1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004
3 Free Software Foundation, Inc.
4 Written by Linus Nordberg, Swox AB <info@swox.com>,
5 based on elf32-ppc.c by Ian Lance Taylor.
6 Largely rewritten by Alan Modra <amodra@bigpond.net.au>
7
8 This file is part of BFD, the Binary File Descriptor library.
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License along
21 with this program; if not, write to the Free Software Foundation, Inc.,
22 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
23
24 /* The 64-bit PowerPC ELF ABI may be found at
25 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
26 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
27
28 #include "bfd.h"
29 #include "sysdep.h"
30 #include "bfdlink.h"
31 #include "libbfd.h"
32 #include "elf-bfd.h"
33 #include "elf/ppc64.h"
34 #include "elf64-ppc.h"
35
36 static bfd_reloc_status_type ppc64_elf_ha_reloc
37 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
38 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_toc_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc64_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52
53
54 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
55 #define TARGET_LITTLE_NAME "elf64-powerpcle"
56 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
57 #define TARGET_BIG_NAME "elf64-powerpc"
58 #define ELF_ARCH bfd_arch_powerpc
59 #define ELF_MACHINE_CODE EM_PPC64
60 #define ELF_MAXPAGESIZE 0x10000
61 #define elf_info_to_howto ppc64_elf_info_to_howto
62
63 #define elf_backend_want_got_sym 0
64 #define elf_backend_want_plt_sym 0
65 #define elf_backend_plt_alignment 3
66 #define elf_backend_plt_not_loaded 1
67 #define elf_backend_got_symbol_offset 0
68 #define elf_backend_got_header_size 8
69 #define elf_backend_can_gc_sections 1
70 #define elf_backend_can_refcount 1
71 #define elf_backend_rela_normal 1
72
73 #define bfd_elf64_mkobject ppc64_elf_mkobject
74 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
75 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
76 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
77 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
78 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
79
80 #define elf_backend_object_p ppc64_elf_object_p
81 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
82 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
83 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
84 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
85 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
86 #define elf_backend_check_relocs ppc64_elf_check_relocs
87 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
88 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
89 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
90 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
91 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
92 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
93 #define elf_backend_relocate_section ppc64_elf_relocate_section
94 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
95 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
96 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
97 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
98 #define elf_backend_special_sections ppc64_elf_special_sections
99
100 /* The name of the dynamic interpreter. This is put in the .interp
101 section. */
102 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
103
104 /* The size in bytes of an entry in the procedure linkage table. */
105 #define PLT_ENTRY_SIZE 24
106
107 /* The initial size of the plt reserved for the dynamic linker. */
108 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
109
110 /* TOC base pointers offset from start of TOC. */
111 #define TOC_BASE_OFF 0x8000
112
113 /* Offset of tp and dtp pointers from start of TLS block. */
114 #define TP_OFFSET 0x7000
115 #define DTP_OFFSET 0x8000
116
117 /* .plt call stub instructions. The normal stub is like this, but
118 sometimes the .plt entry crosses a 64k boundary and we need to
119 insert an addis to adjust r12. */
120 #define PLT_CALL_STUB_SIZE (7*4)
121 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
122 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
123 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
124 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
125 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
126 /* ld %r11,xxx+16@l(%r12) */
127 #define BCTR 0x4e800420 /* bctr */
128
129
130 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
131 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
132
133 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
134
135 /* glink call stub instructions. We enter with the index in R0, and the
136 address of glink entry in CTR. From that, we can calculate PLT0. */
137 #define GLINK_CALL_STUB_SIZE (16*4)
138 #define MFCTR_R12 0x7d8902a6 /* mfctr %r12 */
139 #define SLDI_R11_R0_3 0x780b1f24 /* sldi %r11,%r0,3 */
140 #define ADDIC_R2_R0_32K 0x34408000 /* addic. %r2,%r0,-32768 */
141 #define SUB_R12_R12_R11 0x7d8b6050 /* sub %r12,%r12,%r11 */
142 #define SRADI_R2_R2_63 0x7c42fe76 /* sradi %r2,%r2,63 */
143 #define SLDI_R11_R0_2 0x780b1764 /* sldi %r11,%r0,2 */
144 #define AND_R2_R2_R11 0x7c425838 /* and %r2,%r2,%r11 */
145 /* sub %r12,%r12,%r11 */
146 #define ADD_R12_R12_R2 0x7d8c1214 /* add %r12,%r12,%r2 */
147 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
148 /* ld %r11,xxx@l(%r12) */
149 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,xxx@l */
150 /* ld %r2,8(%r12) */
151 /* mtctr %r11 */
152 /* ld %r11,16(%r12) */
153 /* bctr */
154
155 /* Pad with this. */
156 #define NOP 0x60000000
157
158 /* Some other nops. */
159 #define CROR_151515 0x4def7b82
160 #define CROR_313131 0x4ffffb82
161
162 /* .glink entries for the first 32k functions are two instructions. */
163 #define LI_R0_0 0x38000000 /* li %r0,0 */
164 #define B_DOT 0x48000000 /* b . */
165
166 /* After that, we need two instructions to load the index, followed by
167 a branch. */
168 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
169 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
170
171 /* Instructions to save and restore floating point regs. */
172 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
173 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
174 #define BLR 0x4e800020 /* blr */
175
176 /* Since .opd is an array of descriptors and each entry will end up
177 with identical R_PPC64_RELATIVE relocs, there is really no need to
178 propagate .opd relocs; The dynamic linker should be taught to
179 relocate .opd without reloc entries. */
180 #ifndef NO_OPD_RELOCS
181 #define NO_OPD_RELOCS 0
182 #endif
183
184 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
185
186 /* Relocation HOWTO's. */
187 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
188
189 static reloc_howto_type ppc64_elf_howto_raw[] = {
190 /* This reloc does nothing. */
191 HOWTO (R_PPC64_NONE, /* type */
192 0, /* rightshift */
193 2, /* size (0 = byte, 1 = short, 2 = long) */
194 32, /* bitsize */
195 FALSE, /* pc_relative */
196 0, /* bitpos */
197 complain_overflow_dont, /* complain_on_overflow */
198 bfd_elf_generic_reloc, /* special_function */
199 "R_PPC64_NONE", /* name */
200 FALSE, /* partial_inplace */
201 0, /* src_mask */
202 0, /* dst_mask */
203 FALSE), /* pcrel_offset */
204
205 /* A standard 32 bit relocation. */
206 HOWTO (R_PPC64_ADDR32, /* type */
207 0, /* rightshift */
208 2, /* size (0 = byte, 1 = short, 2 = long) */
209 32, /* bitsize */
210 FALSE, /* pc_relative */
211 0, /* bitpos */
212 complain_overflow_bitfield, /* complain_on_overflow */
213 bfd_elf_generic_reloc, /* special_function */
214 "R_PPC64_ADDR32", /* name */
215 FALSE, /* partial_inplace */
216 0, /* src_mask */
217 0xffffffff, /* dst_mask */
218 FALSE), /* pcrel_offset */
219
220 /* An absolute 26 bit branch; the lower two bits must be zero.
221 FIXME: we don't check that, we just clear them. */
222 HOWTO (R_PPC64_ADDR24, /* type */
223 0, /* rightshift */
224 2, /* size (0 = byte, 1 = short, 2 = long) */
225 26, /* bitsize */
226 FALSE, /* pc_relative */
227 0, /* bitpos */
228 complain_overflow_bitfield, /* complain_on_overflow */
229 bfd_elf_generic_reloc, /* special_function */
230 "R_PPC64_ADDR24", /* name */
231 FALSE, /* partial_inplace */
232 0, /* src_mask */
233 0x03fffffc, /* dst_mask */
234 FALSE), /* pcrel_offset */
235
236 /* A standard 16 bit relocation. */
237 HOWTO (R_PPC64_ADDR16, /* type */
238 0, /* rightshift */
239 1, /* size (0 = byte, 1 = short, 2 = long) */
240 16, /* bitsize */
241 FALSE, /* pc_relative */
242 0, /* bitpos */
243 complain_overflow_bitfield, /* complain_on_overflow */
244 bfd_elf_generic_reloc, /* special_function */
245 "R_PPC64_ADDR16", /* name */
246 FALSE, /* partial_inplace */
247 0, /* src_mask */
248 0xffff, /* dst_mask */
249 FALSE), /* pcrel_offset */
250
251 /* A 16 bit relocation without overflow. */
252 HOWTO (R_PPC64_ADDR16_LO, /* type */
253 0, /* rightshift */
254 1, /* size (0 = byte, 1 = short, 2 = long) */
255 16, /* bitsize */
256 FALSE, /* pc_relative */
257 0, /* bitpos */
258 complain_overflow_dont,/* complain_on_overflow */
259 bfd_elf_generic_reloc, /* special_function */
260 "R_PPC64_ADDR16_LO", /* name */
261 FALSE, /* partial_inplace */
262 0, /* src_mask */
263 0xffff, /* dst_mask */
264 FALSE), /* pcrel_offset */
265
266 /* Bits 16-31 of an address. */
267 HOWTO (R_PPC64_ADDR16_HI, /* type */
268 16, /* rightshift */
269 1, /* size (0 = byte, 1 = short, 2 = long) */
270 16, /* bitsize */
271 FALSE, /* pc_relative */
272 0, /* bitpos */
273 complain_overflow_dont, /* complain_on_overflow */
274 bfd_elf_generic_reloc, /* special_function */
275 "R_PPC64_ADDR16_HI", /* name */
276 FALSE, /* partial_inplace */
277 0, /* src_mask */
278 0xffff, /* dst_mask */
279 FALSE), /* pcrel_offset */
280
281 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
282 bits, treated as a signed number, is negative. */
283 HOWTO (R_PPC64_ADDR16_HA, /* type */
284 16, /* rightshift */
285 1, /* size (0 = byte, 1 = short, 2 = long) */
286 16, /* bitsize */
287 FALSE, /* pc_relative */
288 0, /* bitpos */
289 complain_overflow_dont, /* complain_on_overflow */
290 ppc64_elf_ha_reloc, /* special_function */
291 "R_PPC64_ADDR16_HA", /* name */
292 FALSE, /* partial_inplace */
293 0, /* src_mask */
294 0xffff, /* dst_mask */
295 FALSE), /* pcrel_offset */
296
297 /* An absolute 16 bit branch; the lower two bits must be zero.
298 FIXME: we don't check that, we just clear them. */
299 HOWTO (R_PPC64_ADDR14, /* type */
300 0, /* rightshift */
301 2, /* size (0 = byte, 1 = short, 2 = long) */
302 16, /* bitsize */
303 FALSE, /* pc_relative */
304 0, /* bitpos */
305 complain_overflow_bitfield, /* complain_on_overflow */
306 bfd_elf_generic_reloc, /* special_function */
307 "R_PPC64_ADDR14", /* name */
308 FALSE, /* partial_inplace */
309 0, /* src_mask */
310 0x0000fffc, /* dst_mask */
311 FALSE), /* pcrel_offset */
312
313 /* An absolute 16 bit branch, for which bit 10 should be set to
314 indicate that the branch is expected to be taken. The lower two
315 bits must be zero. */
316 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
317 0, /* rightshift */
318 2, /* size (0 = byte, 1 = short, 2 = long) */
319 16, /* bitsize */
320 FALSE, /* pc_relative */
321 0, /* bitpos */
322 complain_overflow_bitfield, /* complain_on_overflow */
323 ppc64_elf_brtaken_reloc, /* special_function */
324 "R_PPC64_ADDR14_BRTAKEN",/* name */
325 FALSE, /* partial_inplace */
326 0, /* src_mask */
327 0x0000fffc, /* dst_mask */
328 FALSE), /* pcrel_offset */
329
330 /* An absolute 16 bit branch, for which bit 10 should be set to
331 indicate that the branch is not expected to be taken. The lower
332 two bits must be zero. */
333 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
334 0, /* rightshift */
335 2, /* size (0 = byte, 1 = short, 2 = long) */
336 16, /* bitsize */
337 FALSE, /* pc_relative */
338 0, /* bitpos */
339 complain_overflow_bitfield, /* complain_on_overflow */
340 ppc64_elf_brtaken_reloc, /* special_function */
341 "R_PPC64_ADDR14_BRNTAKEN",/* name */
342 FALSE, /* partial_inplace */
343 0, /* src_mask */
344 0x0000fffc, /* dst_mask */
345 FALSE), /* pcrel_offset */
346
347 /* A relative 26 bit branch; the lower two bits must be zero. */
348 HOWTO (R_PPC64_REL24, /* type */
349 0, /* rightshift */
350 2, /* size (0 = byte, 1 = short, 2 = long) */
351 26, /* bitsize */
352 TRUE, /* pc_relative */
353 0, /* bitpos */
354 complain_overflow_signed, /* complain_on_overflow */
355 bfd_elf_generic_reloc, /* special_function */
356 "R_PPC64_REL24", /* name */
357 FALSE, /* partial_inplace */
358 0, /* src_mask */
359 0x03fffffc, /* dst_mask */
360 TRUE), /* pcrel_offset */
361
362 /* A relative 16 bit branch; the lower two bits must be zero. */
363 HOWTO (R_PPC64_REL14, /* type */
364 0, /* rightshift */
365 2, /* size (0 = byte, 1 = short, 2 = long) */
366 16, /* bitsize */
367 TRUE, /* pc_relative */
368 0, /* bitpos */
369 complain_overflow_signed, /* complain_on_overflow */
370 bfd_elf_generic_reloc, /* special_function */
371 "R_PPC64_REL14", /* name */
372 FALSE, /* partial_inplace */
373 0, /* src_mask */
374 0x0000fffc, /* dst_mask */
375 TRUE), /* pcrel_offset */
376
377 /* A relative 16 bit branch. Bit 10 should be set to indicate that
378 the branch is expected to be taken. The lower two bits must be
379 zero. */
380 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
381 0, /* rightshift */
382 2, /* size (0 = byte, 1 = short, 2 = long) */
383 16, /* bitsize */
384 TRUE, /* pc_relative */
385 0, /* bitpos */
386 complain_overflow_signed, /* complain_on_overflow */
387 ppc64_elf_brtaken_reloc, /* special_function */
388 "R_PPC64_REL14_BRTAKEN", /* name */
389 FALSE, /* partial_inplace */
390 0, /* src_mask */
391 0x0000fffc, /* dst_mask */
392 TRUE), /* pcrel_offset */
393
394 /* A relative 16 bit branch. Bit 10 should be set to indicate that
395 the branch is not expected to be taken. The lower two bits must
396 be zero. */
397 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
398 0, /* rightshift */
399 2, /* size (0 = byte, 1 = short, 2 = long) */
400 16, /* bitsize */
401 TRUE, /* pc_relative */
402 0, /* bitpos */
403 complain_overflow_signed, /* complain_on_overflow */
404 ppc64_elf_brtaken_reloc, /* special_function */
405 "R_PPC64_REL14_BRNTAKEN",/* name */
406 FALSE, /* partial_inplace */
407 0, /* src_mask */
408 0x0000fffc, /* dst_mask */
409 TRUE), /* pcrel_offset */
410
411 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
412 symbol. */
413 HOWTO (R_PPC64_GOT16, /* type */
414 0, /* rightshift */
415 1, /* size (0 = byte, 1 = short, 2 = long) */
416 16, /* bitsize */
417 FALSE, /* pc_relative */
418 0, /* bitpos */
419 complain_overflow_signed, /* complain_on_overflow */
420 ppc64_elf_unhandled_reloc, /* special_function */
421 "R_PPC64_GOT16", /* name */
422 FALSE, /* partial_inplace */
423 0, /* src_mask */
424 0xffff, /* dst_mask */
425 FALSE), /* pcrel_offset */
426
427 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
428 the symbol. */
429 HOWTO (R_PPC64_GOT16_LO, /* type */
430 0, /* rightshift */
431 1, /* size (0 = byte, 1 = short, 2 = long) */
432 16, /* bitsize */
433 FALSE, /* pc_relative */
434 0, /* bitpos */
435 complain_overflow_dont, /* complain_on_overflow */
436 ppc64_elf_unhandled_reloc, /* special_function */
437 "R_PPC64_GOT16_LO", /* name */
438 FALSE, /* partial_inplace */
439 0, /* src_mask */
440 0xffff, /* dst_mask */
441 FALSE), /* pcrel_offset */
442
443 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
444 the symbol. */
445 HOWTO (R_PPC64_GOT16_HI, /* type */
446 16, /* rightshift */
447 1, /* size (0 = byte, 1 = short, 2 = long) */
448 16, /* bitsize */
449 FALSE, /* pc_relative */
450 0, /* bitpos */
451 complain_overflow_dont,/* complain_on_overflow */
452 ppc64_elf_unhandled_reloc, /* special_function */
453 "R_PPC64_GOT16_HI", /* name */
454 FALSE, /* partial_inplace */
455 0, /* src_mask */
456 0xffff, /* dst_mask */
457 FALSE), /* pcrel_offset */
458
459 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
460 the symbol. */
461 HOWTO (R_PPC64_GOT16_HA, /* type */
462 16, /* rightshift */
463 1, /* size (0 = byte, 1 = short, 2 = long) */
464 16, /* bitsize */
465 FALSE, /* pc_relative */
466 0, /* bitpos */
467 complain_overflow_dont,/* complain_on_overflow */
468 ppc64_elf_unhandled_reloc, /* special_function */
469 "R_PPC64_GOT16_HA", /* name */
470 FALSE, /* partial_inplace */
471 0, /* src_mask */
472 0xffff, /* dst_mask */
473 FALSE), /* pcrel_offset */
474
475 /* This is used only by the dynamic linker. The symbol should exist
476 both in the object being run and in some shared library. The
477 dynamic linker copies the data addressed by the symbol from the
478 shared library into the object, because the object being
479 run has to have the data at some particular address. */
480 HOWTO (R_PPC64_COPY, /* type */
481 0, /* rightshift */
482 0, /* this one is variable size */
483 0, /* bitsize */
484 FALSE, /* pc_relative */
485 0, /* bitpos */
486 complain_overflow_dont, /* complain_on_overflow */
487 ppc64_elf_unhandled_reloc, /* special_function */
488 "R_PPC64_COPY", /* name */
489 FALSE, /* partial_inplace */
490 0, /* src_mask */
491 0, /* dst_mask */
492 FALSE), /* pcrel_offset */
493
494 /* Like R_PPC64_ADDR64, but used when setting global offset table
495 entries. */
496 HOWTO (R_PPC64_GLOB_DAT, /* type */
497 0, /* rightshift */
498 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
499 64, /* bitsize */
500 FALSE, /* pc_relative */
501 0, /* bitpos */
502 complain_overflow_dont, /* complain_on_overflow */
503 ppc64_elf_unhandled_reloc, /* special_function */
504 "R_PPC64_GLOB_DAT", /* name */
505 FALSE, /* partial_inplace */
506 0, /* src_mask */
507 ONES (64), /* dst_mask */
508 FALSE), /* pcrel_offset */
509
510 /* Created by the link editor. Marks a procedure linkage table
511 entry for a symbol. */
512 HOWTO (R_PPC64_JMP_SLOT, /* type */
513 0, /* rightshift */
514 0, /* size (0 = byte, 1 = short, 2 = long) */
515 0, /* bitsize */
516 FALSE, /* pc_relative */
517 0, /* bitpos */
518 complain_overflow_dont, /* complain_on_overflow */
519 ppc64_elf_unhandled_reloc, /* special_function */
520 "R_PPC64_JMP_SLOT", /* name */
521 FALSE, /* partial_inplace */
522 0, /* src_mask */
523 0, /* dst_mask */
524 FALSE), /* pcrel_offset */
525
526 /* Used only by the dynamic linker. When the object is run, this
527 doubleword64 is set to the load address of the object, plus the
528 addend. */
529 HOWTO (R_PPC64_RELATIVE, /* type */
530 0, /* rightshift */
531 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
532 64, /* bitsize */
533 FALSE, /* pc_relative */
534 0, /* bitpos */
535 complain_overflow_dont, /* complain_on_overflow */
536 bfd_elf_generic_reloc, /* special_function */
537 "R_PPC64_RELATIVE", /* name */
538 FALSE, /* partial_inplace */
539 0, /* src_mask */
540 ONES (64), /* dst_mask */
541 FALSE), /* pcrel_offset */
542
543 /* Like R_PPC64_ADDR32, but may be unaligned. */
544 HOWTO (R_PPC64_UADDR32, /* type */
545 0, /* rightshift */
546 2, /* size (0 = byte, 1 = short, 2 = long) */
547 32, /* bitsize */
548 FALSE, /* pc_relative */
549 0, /* bitpos */
550 complain_overflow_bitfield, /* complain_on_overflow */
551 bfd_elf_generic_reloc, /* special_function */
552 "R_PPC64_UADDR32", /* name */
553 FALSE, /* partial_inplace */
554 0, /* src_mask */
555 0xffffffff, /* dst_mask */
556 FALSE), /* pcrel_offset */
557
558 /* Like R_PPC64_ADDR16, but may be unaligned. */
559 HOWTO (R_PPC64_UADDR16, /* type */
560 0, /* rightshift */
561 1, /* size (0 = byte, 1 = short, 2 = long) */
562 16, /* bitsize */
563 FALSE, /* pc_relative */
564 0, /* bitpos */
565 complain_overflow_bitfield, /* complain_on_overflow */
566 bfd_elf_generic_reloc, /* special_function */
567 "R_PPC64_UADDR16", /* name */
568 FALSE, /* partial_inplace */
569 0, /* src_mask */
570 0xffff, /* dst_mask */
571 FALSE), /* pcrel_offset */
572
573 /* 32-bit PC relative. */
574 HOWTO (R_PPC64_REL32, /* type */
575 0, /* rightshift */
576 2, /* size (0 = byte, 1 = short, 2 = long) */
577 32, /* bitsize */
578 TRUE, /* pc_relative */
579 0, /* bitpos */
580 /* FIXME: Verify. Was complain_overflow_bitfield. */
581 complain_overflow_signed, /* complain_on_overflow */
582 bfd_elf_generic_reloc, /* special_function */
583 "R_PPC64_REL32", /* name */
584 FALSE, /* partial_inplace */
585 0, /* src_mask */
586 0xffffffff, /* dst_mask */
587 TRUE), /* pcrel_offset */
588
589 /* 32-bit relocation to the symbol's procedure linkage table. */
590 HOWTO (R_PPC64_PLT32, /* type */
591 0, /* rightshift */
592 2, /* size (0 = byte, 1 = short, 2 = long) */
593 32, /* bitsize */
594 FALSE, /* pc_relative */
595 0, /* bitpos */
596 complain_overflow_bitfield, /* complain_on_overflow */
597 ppc64_elf_unhandled_reloc, /* special_function */
598 "R_PPC64_PLT32", /* name */
599 FALSE, /* partial_inplace */
600 0, /* src_mask */
601 0xffffffff, /* dst_mask */
602 FALSE), /* pcrel_offset */
603
604 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
605 FIXME: R_PPC64_PLTREL32 not supported. */
606 HOWTO (R_PPC64_PLTREL32, /* type */
607 0, /* rightshift */
608 2, /* size (0 = byte, 1 = short, 2 = long) */
609 32, /* bitsize */
610 TRUE, /* pc_relative */
611 0, /* bitpos */
612 complain_overflow_signed, /* complain_on_overflow */
613 bfd_elf_generic_reloc, /* special_function */
614 "R_PPC64_PLTREL32", /* name */
615 FALSE, /* partial_inplace */
616 0, /* src_mask */
617 0xffffffff, /* dst_mask */
618 TRUE), /* pcrel_offset */
619
620 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
621 the symbol. */
622 HOWTO (R_PPC64_PLT16_LO, /* type */
623 0, /* rightshift */
624 1, /* size (0 = byte, 1 = short, 2 = long) */
625 16, /* bitsize */
626 FALSE, /* pc_relative */
627 0, /* bitpos */
628 complain_overflow_dont, /* complain_on_overflow */
629 ppc64_elf_unhandled_reloc, /* special_function */
630 "R_PPC64_PLT16_LO", /* name */
631 FALSE, /* partial_inplace */
632 0, /* src_mask */
633 0xffff, /* dst_mask */
634 FALSE), /* pcrel_offset */
635
636 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
637 the symbol. */
638 HOWTO (R_PPC64_PLT16_HI, /* type */
639 16, /* rightshift */
640 1, /* size (0 = byte, 1 = short, 2 = long) */
641 16, /* bitsize */
642 FALSE, /* pc_relative */
643 0, /* bitpos */
644 complain_overflow_dont, /* complain_on_overflow */
645 ppc64_elf_unhandled_reloc, /* special_function */
646 "R_PPC64_PLT16_HI", /* name */
647 FALSE, /* partial_inplace */
648 0, /* src_mask */
649 0xffff, /* dst_mask */
650 FALSE), /* pcrel_offset */
651
652 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
653 the symbol. */
654 HOWTO (R_PPC64_PLT16_HA, /* type */
655 16, /* rightshift */
656 1, /* size (0 = byte, 1 = short, 2 = long) */
657 16, /* bitsize */
658 FALSE, /* pc_relative */
659 0, /* bitpos */
660 complain_overflow_dont, /* complain_on_overflow */
661 ppc64_elf_unhandled_reloc, /* special_function */
662 "R_PPC64_PLT16_HA", /* name */
663 FALSE, /* partial_inplace */
664 0, /* src_mask */
665 0xffff, /* dst_mask */
666 FALSE), /* pcrel_offset */
667
668 /* 16-bit section relative relocation. */
669 HOWTO (R_PPC64_SECTOFF, /* type */
670 0, /* rightshift */
671 1, /* size (0 = byte, 1 = short, 2 = long) */
672 16, /* bitsize */
673 FALSE, /* pc_relative */
674 0, /* bitpos */
675 complain_overflow_bitfield, /* complain_on_overflow */
676 ppc64_elf_sectoff_reloc, /* special_function */
677 "R_PPC64_SECTOFF", /* name */
678 FALSE, /* partial_inplace */
679 0, /* src_mask */
680 0xffff, /* dst_mask */
681 FALSE), /* pcrel_offset */
682
683 /* Like R_PPC64_SECTOFF, but no overflow warning. */
684 HOWTO (R_PPC64_SECTOFF_LO, /* type */
685 0, /* rightshift */
686 1, /* size (0 = byte, 1 = short, 2 = long) */
687 16, /* bitsize */
688 FALSE, /* pc_relative */
689 0, /* bitpos */
690 complain_overflow_dont, /* complain_on_overflow */
691 ppc64_elf_sectoff_reloc, /* special_function */
692 "R_PPC64_SECTOFF_LO", /* name */
693 FALSE, /* partial_inplace */
694 0, /* src_mask */
695 0xffff, /* dst_mask */
696 FALSE), /* pcrel_offset */
697
698 /* 16-bit upper half section relative relocation. */
699 HOWTO (R_PPC64_SECTOFF_HI, /* type */
700 16, /* rightshift */
701 1, /* size (0 = byte, 1 = short, 2 = long) */
702 16, /* bitsize */
703 FALSE, /* pc_relative */
704 0, /* bitpos */
705 complain_overflow_dont, /* complain_on_overflow */
706 ppc64_elf_sectoff_reloc, /* special_function */
707 "R_PPC64_SECTOFF_HI", /* name */
708 FALSE, /* partial_inplace */
709 0, /* src_mask */
710 0xffff, /* dst_mask */
711 FALSE), /* pcrel_offset */
712
713 /* 16-bit upper half adjusted section relative relocation. */
714 HOWTO (R_PPC64_SECTOFF_HA, /* type */
715 16, /* rightshift */
716 1, /* size (0 = byte, 1 = short, 2 = long) */
717 16, /* bitsize */
718 FALSE, /* pc_relative */
719 0, /* bitpos */
720 complain_overflow_dont, /* complain_on_overflow */
721 ppc64_elf_sectoff_ha_reloc, /* special_function */
722 "R_PPC64_SECTOFF_HA", /* name */
723 FALSE, /* partial_inplace */
724 0, /* src_mask */
725 0xffff, /* dst_mask */
726 FALSE), /* pcrel_offset */
727
728 /* Like R_PPC64_REL24 without touching the two least significant bits. */
729 HOWTO (R_PPC64_REL30, /* type */
730 2, /* rightshift */
731 2, /* size (0 = byte, 1 = short, 2 = long) */
732 30, /* bitsize */
733 TRUE, /* pc_relative */
734 0, /* bitpos */
735 complain_overflow_dont, /* complain_on_overflow */
736 bfd_elf_generic_reloc, /* special_function */
737 "R_PPC64_REL30", /* name */
738 FALSE, /* partial_inplace */
739 0, /* src_mask */
740 0xfffffffc, /* dst_mask */
741 TRUE), /* pcrel_offset */
742
743 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
744
745 /* A standard 64-bit relocation. */
746 HOWTO (R_PPC64_ADDR64, /* type */
747 0, /* rightshift */
748 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
749 64, /* bitsize */
750 FALSE, /* pc_relative */
751 0, /* bitpos */
752 complain_overflow_dont, /* complain_on_overflow */
753 bfd_elf_generic_reloc, /* special_function */
754 "R_PPC64_ADDR64", /* name */
755 FALSE, /* partial_inplace */
756 0, /* src_mask */
757 ONES (64), /* dst_mask */
758 FALSE), /* pcrel_offset */
759
760 /* The bits 32-47 of an address. */
761 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
762 32, /* rightshift */
763 1, /* size (0 = byte, 1 = short, 2 = long) */
764 16, /* bitsize */
765 FALSE, /* pc_relative */
766 0, /* bitpos */
767 complain_overflow_dont, /* complain_on_overflow */
768 bfd_elf_generic_reloc, /* special_function */
769 "R_PPC64_ADDR16_HIGHER", /* name */
770 FALSE, /* partial_inplace */
771 0, /* src_mask */
772 0xffff, /* dst_mask */
773 FALSE), /* pcrel_offset */
774
775 /* The bits 32-47 of an address, plus 1 if the contents of the low
776 16 bits, treated as a signed number, is negative. */
777 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
778 32, /* rightshift */
779 1, /* size (0 = byte, 1 = short, 2 = long) */
780 16, /* bitsize */
781 FALSE, /* pc_relative */
782 0, /* bitpos */
783 complain_overflow_dont, /* complain_on_overflow */
784 ppc64_elf_ha_reloc, /* special_function */
785 "R_PPC64_ADDR16_HIGHERA", /* name */
786 FALSE, /* partial_inplace */
787 0, /* src_mask */
788 0xffff, /* dst_mask */
789 FALSE), /* pcrel_offset */
790
791 /* The bits 48-63 of an address. */
792 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
793 48, /* rightshift */
794 1, /* size (0 = byte, 1 = short, 2 = long) */
795 16, /* bitsize */
796 FALSE, /* pc_relative */
797 0, /* bitpos */
798 complain_overflow_dont, /* complain_on_overflow */
799 bfd_elf_generic_reloc, /* special_function */
800 "R_PPC64_ADDR16_HIGHEST", /* name */
801 FALSE, /* partial_inplace */
802 0, /* src_mask */
803 0xffff, /* dst_mask */
804 FALSE), /* pcrel_offset */
805
806 /* The bits 48-63 of an address, plus 1 if the contents of the low
807 16 bits, treated as a signed number, is negative. */
808 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
809 48, /* rightshift */
810 1, /* size (0 = byte, 1 = short, 2 = long) */
811 16, /* bitsize */
812 FALSE, /* pc_relative */
813 0, /* bitpos */
814 complain_overflow_dont, /* complain_on_overflow */
815 ppc64_elf_ha_reloc, /* special_function */
816 "R_PPC64_ADDR16_HIGHESTA", /* name */
817 FALSE, /* partial_inplace */
818 0, /* src_mask */
819 0xffff, /* dst_mask */
820 FALSE), /* pcrel_offset */
821
822 /* Like ADDR64, but may be unaligned. */
823 HOWTO (R_PPC64_UADDR64, /* type */
824 0, /* rightshift */
825 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
826 64, /* bitsize */
827 FALSE, /* pc_relative */
828 0, /* bitpos */
829 complain_overflow_dont, /* complain_on_overflow */
830 bfd_elf_generic_reloc, /* special_function */
831 "R_PPC64_UADDR64", /* name */
832 FALSE, /* partial_inplace */
833 0, /* src_mask */
834 ONES (64), /* dst_mask */
835 FALSE), /* pcrel_offset */
836
837 /* 64-bit relative relocation. */
838 HOWTO (R_PPC64_REL64, /* type */
839 0, /* rightshift */
840 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
841 64, /* bitsize */
842 TRUE, /* pc_relative */
843 0, /* bitpos */
844 complain_overflow_dont, /* complain_on_overflow */
845 bfd_elf_generic_reloc, /* special_function */
846 "R_PPC64_REL64", /* name */
847 FALSE, /* partial_inplace */
848 0, /* src_mask */
849 ONES (64), /* dst_mask */
850 TRUE), /* pcrel_offset */
851
852 /* 64-bit relocation to the symbol's procedure linkage table. */
853 HOWTO (R_PPC64_PLT64, /* type */
854 0, /* rightshift */
855 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
856 64, /* bitsize */
857 FALSE, /* pc_relative */
858 0, /* bitpos */
859 complain_overflow_dont, /* complain_on_overflow */
860 ppc64_elf_unhandled_reloc, /* special_function */
861 "R_PPC64_PLT64", /* name */
862 FALSE, /* partial_inplace */
863 0, /* src_mask */
864 ONES (64), /* dst_mask */
865 FALSE), /* pcrel_offset */
866
867 /* 64-bit PC relative relocation to the symbol's procedure linkage
868 table. */
869 /* FIXME: R_PPC64_PLTREL64 not supported. */
870 HOWTO (R_PPC64_PLTREL64, /* type */
871 0, /* rightshift */
872 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
873 64, /* bitsize */
874 TRUE, /* pc_relative */
875 0, /* bitpos */
876 complain_overflow_dont, /* complain_on_overflow */
877 ppc64_elf_unhandled_reloc, /* special_function */
878 "R_PPC64_PLTREL64", /* name */
879 FALSE, /* partial_inplace */
880 0, /* src_mask */
881 ONES (64), /* dst_mask */
882 TRUE), /* pcrel_offset */
883
884 /* 16 bit TOC-relative relocation. */
885
886 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
887 HOWTO (R_PPC64_TOC16, /* type */
888 0, /* rightshift */
889 1, /* size (0 = byte, 1 = short, 2 = long) */
890 16, /* bitsize */
891 FALSE, /* pc_relative */
892 0, /* bitpos */
893 complain_overflow_signed, /* complain_on_overflow */
894 ppc64_elf_toc_reloc, /* special_function */
895 "R_PPC64_TOC16", /* name */
896 FALSE, /* partial_inplace */
897 0, /* src_mask */
898 0xffff, /* dst_mask */
899 FALSE), /* pcrel_offset */
900
901 /* 16 bit TOC-relative relocation without overflow. */
902
903 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
904 HOWTO (R_PPC64_TOC16_LO, /* type */
905 0, /* rightshift */
906 1, /* size (0 = byte, 1 = short, 2 = long) */
907 16, /* bitsize */
908 FALSE, /* pc_relative */
909 0, /* bitpos */
910 complain_overflow_dont, /* complain_on_overflow */
911 ppc64_elf_toc_reloc, /* special_function */
912 "R_PPC64_TOC16_LO", /* name */
913 FALSE, /* partial_inplace */
914 0, /* src_mask */
915 0xffff, /* dst_mask */
916 FALSE), /* pcrel_offset */
917
918 /* 16 bit TOC-relative relocation, high 16 bits. */
919
920 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
921 HOWTO (R_PPC64_TOC16_HI, /* type */
922 16, /* rightshift */
923 1, /* size (0 = byte, 1 = short, 2 = long) */
924 16, /* bitsize */
925 FALSE, /* pc_relative */
926 0, /* bitpos */
927 complain_overflow_dont, /* complain_on_overflow */
928 ppc64_elf_toc_reloc, /* special_function */
929 "R_PPC64_TOC16_HI", /* name */
930 FALSE, /* partial_inplace */
931 0, /* src_mask */
932 0xffff, /* dst_mask */
933 FALSE), /* pcrel_offset */
934
935 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
936 contents of the low 16 bits, treated as a signed number, is
937 negative. */
938
939 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
940 HOWTO (R_PPC64_TOC16_HA, /* type */
941 16, /* rightshift */
942 1, /* size (0 = byte, 1 = short, 2 = long) */
943 16, /* bitsize */
944 FALSE, /* pc_relative */
945 0, /* bitpos */
946 complain_overflow_dont, /* complain_on_overflow */
947 ppc64_elf_toc_ha_reloc, /* special_function */
948 "R_PPC64_TOC16_HA", /* name */
949 FALSE, /* partial_inplace */
950 0, /* src_mask */
951 0xffff, /* dst_mask */
952 FALSE), /* pcrel_offset */
953
954 /* 64-bit relocation; insert value of TOC base (.TOC.). */
955
956 /* R_PPC64_TOC 51 doubleword64 .TOC. */
957 HOWTO (R_PPC64_TOC, /* type */
958 0, /* rightshift */
959 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
960 64, /* bitsize */
961 FALSE, /* pc_relative */
962 0, /* bitpos */
963 complain_overflow_bitfield, /* complain_on_overflow */
964 ppc64_elf_toc64_reloc, /* special_function */
965 "R_PPC64_TOC", /* name */
966 FALSE, /* partial_inplace */
967 0, /* src_mask */
968 ONES (64), /* dst_mask */
969 FALSE), /* pcrel_offset */
970
971 /* Like R_PPC64_GOT16, but also informs the link editor that the
972 value to relocate may (!) refer to a PLT entry which the link
973 editor (a) may replace with the symbol value. If the link editor
974 is unable to fully resolve the symbol, it may (b) create a PLT
975 entry and store the address to the new PLT entry in the GOT.
976 This permits lazy resolution of function symbols at run time.
977 The link editor may also skip all of this and just (c) emit a
978 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
979 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
980 HOWTO (R_PPC64_PLTGOT16, /* type */
981 0, /* rightshift */
982 1, /* size (0 = byte, 1 = short, 2 = long) */
983 16, /* bitsize */
984 FALSE, /* pc_relative */
985 0, /* bitpos */
986 complain_overflow_signed, /* complain_on_overflow */
987 ppc64_elf_unhandled_reloc, /* special_function */
988 "R_PPC64_PLTGOT16", /* name */
989 FALSE, /* partial_inplace */
990 0, /* src_mask */
991 0xffff, /* dst_mask */
992 FALSE), /* pcrel_offset */
993
994 /* Like R_PPC64_PLTGOT16, but without overflow. */
995 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
996 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
997 0, /* rightshift */
998 1, /* size (0 = byte, 1 = short, 2 = long) */
999 16, /* bitsize */
1000 FALSE, /* pc_relative */
1001 0, /* bitpos */
1002 complain_overflow_dont, /* complain_on_overflow */
1003 ppc64_elf_unhandled_reloc, /* special_function */
1004 "R_PPC64_PLTGOT16_LO", /* name */
1005 FALSE, /* partial_inplace */
1006 0, /* src_mask */
1007 0xffff, /* dst_mask */
1008 FALSE), /* pcrel_offset */
1009
1010 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1011 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1012 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1013 16, /* rightshift */
1014 1, /* size (0 = byte, 1 = short, 2 = long) */
1015 16, /* bitsize */
1016 FALSE, /* pc_relative */
1017 0, /* bitpos */
1018 complain_overflow_dont, /* complain_on_overflow */
1019 ppc64_elf_unhandled_reloc, /* special_function */
1020 "R_PPC64_PLTGOT16_HI", /* name */
1021 FALSE, /* partial_inplace */
1022 0, /* src_mask */
1023 0xffff, /* dst_mask */
1024 FALSE), /* pcrel_offset */
1025
1026 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1027 1 if the contents of the low 16 bits, treated as a signed number,
1028 is negative. */
1029 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1030 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1031 16, /* rightshift */
1032 1, /* size (0 = byte, 1 = short, 2 = long) */
1033 16, /* bitsize */
1034 FALSE, /* pc_relative */
1035 0, /* bitpos */
1036 complain_overflow_dont,/* complain_on_overflow */
1037 ppc64_elf_unhandled_reloc, /* special_function */
1038 "R_PPC64_PLTGOT16_HA", /* name */
1039 FALSE, /* partial_inplace */
1040 0, /* src_mask */
1041 0xffff, /* dst_mask */
1042 FALSE), /* pcrel_offset */
1043
1044 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1045 HOWTO (R_PPC64_ADDR16_DS, /* type */
1046 0, /* rightshift */
1047 1, /* size (0 = byte, 1 = short, 2 = long) */
1048 16, /* bitsize */
1049 FALSE, /* pc_relative */
1050 0, /* bitpos */
1051 complain_overflow_bitfield, /* complain_on_overflow */
1052 bfd_elf_generic_reloc, /* special_function */
1053 "R_PPC64_ADDR16_DS", /* name */
1054 FALSE, /* partial_inplace */
1055 0, /* src_mask */
1056 0xfffc, /* dst_mask */
1057 FALSE), /* pcrel_offset */
1058
1059 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1060 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1061 0, /* rightshift */
1062 1, /* size (0 = byte, 1 = short, 2 = long) */
1063 16, /* bitsize */
1064 FALSE, /* pc_relative */
1065 0, /* bitpos */
1066 complain_overflow_dont,/* complain_on_overflow */
1067 bfd_elf_generic_reloc, /* special_function */
1068 "R_PPC64_ADDR16_LO_DS",/* name */
1069 FALSE, /* partial_inplace */
1070 0, /* src_mask */
1071 0xfffc, /* dst_mask */
1072 FALSE), /* pcrel_offset */
1073
1074 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1075 HOWTO (R_PPC64_GOT16_DS, /* type */
1076 0, /* rightshift */
1077 1, /* size (0 = byte, 1 = short, 2 = long) */
1078 16, /* bitsize */
1079 FALSE, /* pc_relative */
1080 0, /* bitpos */
1081 complain_overflow_signed, /* complain_on_overflow */
1082 ppc64_elf_unhandled_reloc, /* special_function */
1083 "R_PPC64_GOT16_DS", /* name */
1084 FALSE, /* partial_inplace */
1085 0, /* src_mask */
1086 0xfffc, /* dst_mask */
1087 FALSE), /* pcrel_offset */
1088
1089 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1090 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1091 0, /* rightshift */
1092 1, /* size (0 = byte, 1 = short, 2 = long) */
1093 16, /* bitsize */
1094 FALSE, /* pc_relative */
1095 0, /* bitpos */
1096 complain_overflow_dont, /* complain_on_overflow */
1097 ppc64_elf_unhandled_reloc, /* special_function */
1098 "R_PPC64_GOT16_LO_DS", /* name */
1099 FALSE, /* partial_inplace */
1100 0, /* src_mask */
1101 0xfffc, /* dst_mask */
1102 FALSE), /* pcrel_offset */
1103
1104 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1105 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1106 0, /* rightshift */
1107 1, /* size (0 = byte, 1 = short, 2 = long) */
1108 16, /* bitsize */
1109 FALSE, /* pc_relative */
1110 0, /* bitpos */
1111 complain_overflow_dont, /* complain_on_overflow */
1112 ppc64_elf_unhandled_reloc, /* special_function */
1113 "R_PPC64_PLT16_LO_DS", /* name */
1114 FALSE, /* partial_inplace */
1115 0, /* src_mask */
1116 0xfffc, /* dst_mask */
1117 FALSE), /* pcrel_offset */
1118
1119 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1120 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1121 0, /* rightshift */
1122 1, /* size (0 = byte, 1 = short, 2 = long) */
1123 16, /* bitsize */
1124 FALSE, /* pc_relative */
1125 0, /* bitpos */
1126 complain_overflow_bitfield, /* complain_on_overflow */
1127 ppc64_elf_sectoff_reloc, /* special_function */
1128 "R_PPC64_SECTOFF_DS", /* name */
1129 FALSE, /* partial_inplace */
1130 0, /* src_mask */
1131 0xfffc, /* dst_mask */
1132 FALSE), /* pcrel_offset */
1133
1134 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1135 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1136 0, /* rightshift */
1137 1, /* size (0 = byte, 1 = short, 2 = long) */
1138 16, /* bitsize */
1139 FALSE, /* pc_relative */
1140 0, /* bitpos */
1141 complain_overflow_dont, /* complain_on_overflow */
1142 ppc64_elf_sectoff_reloc, /* special_function */
1143 "R_PPC64_SECTOFF_LO_DS",/* name */
1144 FALSE, /* partial_inplace */
1145 0, /* src_mask */
1146 0xfffc, /* dst_mask */
1147 FALSE), /* pcrel_offset */
1148
1149 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1150 HOWTO (R_PPC64_TOC16_DS, /* type */
1151 0, /* rightshift */
1152 1, /* size (0 = byte, 1 = short, 2 = long) */
1153 16, /* bitsize */
1154 FALSE, /* pc_relative */
1155 0, /* bitpos */
1156 complain_overflow_signed, /* complain_on_overflow */
1157 ppc64_elf_toc_reloc, /* special_function */
1158 "R_PPC64_TOC16_DS", /* name */
1159 FALSE, /* partial_inplace */
1160 0, /* src_mask */
1161 0xfffc, /* dst_mask */
1162 FALSE), /* pcrel_offset */
1163
1164 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1165 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1166 0, /* rightshift */
1167 1, /* size (0 = byte, 1 = short, 2 = long) */
1168 16, /* bitsize */
1169 FALSE, /* pc_relative */
1170 0, /* bitpos */
1171 complain_overflow_dont, /* complain_on_overflow */
1172 ppc64_elf_toc_reloc, /* special_function */
1173 "R_PPC64_TOC16_LO_DS", /* name */
1174 FALSE, /* partial_inplace */
1175 0, /* src_mask */
1176 0xfffc, /* dst_mask */
1177 FALSE), /* pcrel_offset */
1178
1179 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1180 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1181 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1182 0, /* rightshift */
1183 1, /* size (0 = byte, 1 = short, 2 = long) */
1184 16, /* bitsize */
1185 FALSE, /* pc_relative */
1186 0, /* bitpos */
1187 complain_overflow_signed, /* complain_on_overflow */
1188 ppc64_elf_unhandled_reloc, /* special_function */
1189 "R_PPC64_PLTGOT16_DS", /* name */
1190 FALSE, /* partial_inplace */
1191 0, /* src_mask */
1192 0xfffc, /* dst_mask */
1193 FALSE), /* pcrel_offset */
1194
1195 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1196 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1197 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1198 0, /* rightshift */
1199 1, /* size (0 = byte, 1 = short, 2 = long) */
1200 16, /* bitsize */
1201 FALSE, /* pc_relative */
1202 0, /* bitpos */
1203 complain_overflow_dont, /* complain_on_overflow */
1204 ppc64_elf_unhandled_reloc, /* special_function */
1205 "R_PPC64_PLTGOT16_LO_DS",/* name */
1206 FALSE, /* partial_inplace */
1207 0, /* src_mask */
1208 0xfffc, /* dst_mask */
1209 FALSE), /* pcrel_offset */
1210
1211 /* Marker reloc for TLS. */
1212 HOWTO (R_PPC64_TLS,
1213 0, /* rightshift */
1214 2, /* size (0 = byte, 1 = short, 2 = long) */
1215 32, /* bitsize */
1216 FALSE, /* pc_relative */
1217 0, /* bitpos */
1218 complain_overflow_dont, /* complain_on_overflow */
1219 bfd_elf_generic_reloc, /* special_function */
1220 "R_PPC64_TLS", /* name */
1221 FALSE, /* partial_inplace */
1222 0, /* src_mask */
1223 0, /* dst_mask */
1224 FALSE), /* pcrel_offset */
1225
1226 /* Computes the load module index of the load module that contains the
1227 definition of its TLS sym. */
1228 HOWTO (R_PPC64_DTPMOD64,
1229 0, /* rightshift */
1230 4, /* size (0 = byte, 1 = short, 2 = long) */
1231 64, /* bitsize */
1232 FALSE, /* pc_relative */
1233 0, /* bitpos */
1234 complain_overflow_dont, /* complain_on_overflow */
1235 ppc64_elf_unhandled_reloc, /* special_function */
1236 "R_PPC64_DTPMOD64", /* name */
1237 FALSE, /* partial_inplace */
1238 0, /* src_mask */
1239 ONES (64), /* dst_mask */
1240 FALSE), /* pcrel_offset */
1241
1242 /* Computes a dtv-relative displacement, the difference between the value
1243 of sym+add and the base address of the thread-local storage block that
1244 contains the definition of sym, minus 0x8000. */
1245 HOWTO (R_PPC64_DTPREL64,
1246 0, /* rightshift */
1247 4, /* size (0 = byte, 1 = short, 2 = long) */
1248 64, /* bitsize */
1249 FALSE, /* pc_relative */
1250 0, /* bitpos */
1251 complain_overflow_dont, /* complain_on_overflow */
1252 ppc64_elf_unhandled_reloc, /* special_function */
1253 "R_PPC64_DTPREL64", /* name */
1254 FALSE, /* partial_inplace */
1255 0, /* src_mask */
1256 ONES (64), /* dst_mask */
1257 FALSE), /* pcrel_offset */
1258
1259 /* A 16 bit dtprel reloc. */
1260 HOWTO (R_PPC64_DTPREL16,
1261 0, /* rightshift */
1262 1, /* size (0 = byte, 1 = short, 2 = long) */
1263 16, /* bitsize */
1264 FALSE, /* pc_relative */
1265 0, /* bitpos */
1266 complain_overflow_signed, /* complain_on_overflow */
1267 ppc64_elf_unhandled_reloc, /* special_function */
1268 "R_PPC64_DTPREL16", /* name */
1269 FALSE, /* partial_inplace */
1270 0, /* src_mask */
1271 0xffff, /* dst_mask */
1272 FALSE), /* pcrel_offset */
1273
1274 /* Like DTPREL16, but no overflow. */
1275 HOWTO (R_PPC64_DTPREL16_LO,
1276 0, /* rightshift */
1277 1, /* size (0 = byte, 1 = short, 2 = long) */
1278 16, /* bitsize */
1279 FALSE, /* pc_relative */
1280 0, /* bitpos */
1281 complain_overflow_dont, /* complain_on_overflow */
1282 ppc64_elf_unhandled_reloc, /* special_function */
1283 "R_PPC64_DTPREL16_LO", /* name */
1284 FALSE, /* partial_inplace */
1285 0, /* src_mask */
1286 0xffff, /* dst_mask */
1287 FALSE), /* pcrel_offset */
1288
1289 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1290 HOWTO (R_PPC64_DTPREL16_HI,
1291 16, /* rightshift */
1292 1, /* size (0 = byte, 1 = short, 2 = long) */
1293 16, /* bitsize */
1294 FALSE, /* pc_relative */
1295 0, /* bitpos */
1296 complain_overflow_dont, /* complain_on_overflow */
1297 ppc64_elf_unhandled_reloc, /* special_function */
1298 "R_PPC64_DTPREL16_HI", /* name */
1299 FALSE, /* partial_inplace */
1300 0, /* src_mask */
1301 0xffff, /* dst_mask */
1302 FALSE), /* pcrel_offset */
1303
1304 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1305 HOWTO (R_PPC64_DTPREL16_HA,
1306 16, /* rightshift */
1307 1, /* size (0 = byte, 1 = short, 2 = long) */
1308 16, /* bitsize */
1309 FALSE, /* pc_relative */
1310 0, /* bitpos */
1311 complain_overflow_dont, /* complain_on_overflow */
1312 ppc64_elf_unhandled_reloc, /* special_function */
1313 "R_PPC64_DTPREL16_HA", /* name */
1314 FALSE, /* partial_inplace */
1315 0, /* src_mask */
1316 0xffff, /* dst_mask */
1317 FALSE), /* pcrel_offset */
1318
1319 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1320 HOWTO (R_PPC64_DTPREL16_HIGHER,
1321 32, /* rightshift */
1322 1, /* size (0 = byte, 1 = short, 2 = long) */
1323 16, /* bitsize */
1324 FALSE, /* pc_relative */
1325 0, /* bitpos */
1326 complain_overflow_dont, /* complain_on_overflow */
1327 ppc64_elf_unhandled_reloc, /* special_function */
1328 "R_PPC64_DTPREL16_HIGHER", /* name */
1329 FALSE, /* partial_inplace */
1330 0, /* src_mask */
1331 0xffff, /* dst_mask */
1332 FALSE), /* pcrel_offset */
1333
1334 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1335 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1336 32, /* rightshift */
1337 1, /* size (0 = byte, 1 = short, 2 = long) */
1338 16, /* bitsize */
1339 FALSE, /* pc_relative */
1340 0, /* bitpos */
1341 complain_overflow_dont, /* complain_on_overflow */
1342 ppc64_elf_unhandled_reloc, /* special_function */
1343 "R_PPC64_DTPREL16_HIGHERA", /* name */
1344 FALSE, /* partial_inplace */
1345 0, /* src_mask */
1346 0xffff, /* dst_mask */
1347 FALSE), /* pcrel_offset */
1348
1349 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1350 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1351 48, /* rightshift */
1352 1, /* size (0 = byte, 1 = short, 2 = long) */
1353 16, /* bitsize */
1354 FALSE, /* pc_relative */
1355 0, /* bitpos */
1356 complain_overflow_dont, /* complain_on_overflow */
1357 ppc64_elf_unhandled_reloc, /* special_function */
1358 "R_PPC64_DTPREL16_HIGHEST", /* name */
1359 FALSE, /* partial_inplace */
1360 0, /* src_mask */
1361 0xffff, /* dst_mask */
1362 FALSE), /* pcrel_offset */
1363
1364 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1365 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1366 48, /* rightshift */
1367 1, /* size (0 = byte, 1 = short, 2 = long) */
1368 16, /* bitsize */
1369 FALSE, /* pc_relative */
1370 0, /* bitpos */
1371 complain_overflow_dont, /* complain_on_overflow */
1372 ppc64_elf_unhandled_reloc, /* special_function */
1373 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1374 FALSE, /* partial_inplace */
1375 0, /* src_mask */
1376 0xffff, /* dst_mask */
1377 FALSE), /* pcrel_offset */
1378
1379 /* Like DTPREL16, but for insns with a DS field. */
1380 HOWTO (R_PPC64_DTPREL16_DS,
1381 0, /* rightshift */
1382 1, /* size (0 = byte, 1 = short, 2 = long) */
1383 16, /* bitsize */
1384 FALSE, /* pc_relative */
1385 0, /* bitpos */
1386 complain_overflow_signed, /* complain_on_overflow */
1387 ppc64_elf_unhandled_reloc, /* special_function */
1388 "R_PPC64_DTPREL16_DS", /* name */
1389 FALSE, /* partial_inplace */
1390 0, /* src_mask */
1391 0xfffc, /* dst_mask */
1392 FALSE), /* pcrel_offset */
1393
1394 /* Like DTPREL16_DS, but no overflow. */
1395 HOWTO (R_PPC64_DTPREL16_LO_DS,
1396 0, /* rightshift */
1397 1, /* size (0 = byte, 1 = short, 2 = long) */
1398 16, /* bitsize */
1399 FALSE, /* pc_relative */
1400 0, /* bitpos */
1401 complain_overflow_dont, /* complain_on_overflow */
1402 ppc64_elf_unhandled_reloc, /* special_function */
1403 "R_PPC64_DTPREL16_LO_DS", /* name */
1404 FALSE, /* partial_inplace */
1405 0, /* src_mask */
1406 0xfffc, /* dst_mask */
1407 FALSE), /* pcrel_offset */
1408
1409 /* Computes a tp-relative displacement, the difference between the value of
1410 sym+add and the value of the thread pointer (r13). */
1411 HOWTO (R_PPC64_TPREL64,
1412 0, /* rightshift */
1413 4, /* size (0 = byte, 1 = short, 2 = long) */
1414 64, /* bitsize */
1415 FALSE, /* pc_relative */
1416 0, /* bitpos */
1417 complain_overflow_dont, /* complain_on_overflow */
1418 ppc64_elf_unhandled_reloc, /* special_function */
1419 "R_PPC64_TPREL64", /* name */
1420 FALSE, /* partial_inplace */
1421 0, /* src_mask */
1422 ONES (64), /* dst_mask */
1423 FALSE), /* pcrel_offset */
1424
1425 /* A 16 bit tprel reloc. */
1426 HOWTO (R_PPC64_TPREL16,
1427 0, /* rightshift */
1428 1, /* size (0 = byte, 1 = short, 2 = long) */
1429 16, /* bitsize */
1430 FALSE, /* pc_relative */
1431 0, /* bitpos */
1432 complain_overflow_signed, /* complain_on_overflow */
1433 ppc64_elf_unhandled_reloc, /* special_function */
1434 "R_PPC64_TPREL16", /* name */
1435 FALSE, /* partial_inplace */
1436 0, /* src_mask */
1437 0xffff, /* dst_mask */
1438 FALSE), /* pcrel_offset */
1439
1440 /* Like TPREL16, but no overflow. */
1441 HOWTO (R_PPC64_TPREL16_LO,
1442 0, /* rightshift */
1443 1, /* size (0 = byte, 1 = short, 2 = long) */
1444 16, /* bitsize */
1445 FALSE, /* pc_relative */
1446 0, /* bitpos */
1447 complain_overflow_dont, /* complain_on_overflow */
1448 ppc64_elf_unhandled_reloc, /* special_function */
1449 "R_PPC64_TPREL16_LO", /* name */
1450 FALSE, /* partial_inplace */
1451 0, /* src_mask */
1452 0xffff, /* dst_mask */
1453 FALSE), /* pcrel_offset */
1454
1455 /* Like TPREL16_LO, but next higher group of 16 bits. */
1456 HOWTO (R_PPC64_TPREL16_HI,
1457 16, /* rightshift */
1458 1, /* size (0 = byte, 1 = short, 2 = long) */
1459 16, /* bitsize */
1460 FALSE, /* pc_relative */
1461 0, /* bitpos */
1462 complain_overflow_dont, /* complain_on_overflow */
1463 ppc64_elf_unhandled_reloc, /* special_function */
1464 "R_PPC64_TPREL16_HI", /* name */
1465 FALSE, /* partial_inplace */
1466 0, /* src_mask */
1467 0xffff, /* dst_mask */
1468 FALSE), /* pcrel_offset */
1469
1470 /* Like TPREL16_HI, but adjust for low 16 bits. */
1471 HOWTO (R_PPC64_TPREL16_HA,
1472 16, /* rightshift */
1473 1, /* size (0 = byte, 1 = short, 2 = long) */
1474 16, /* bitsize */
1475 FALSE, /* pc_relative */
1476 0, /* bitpos */
1477 complain_overflow_dont, /* complain_on_overflow */
1478 ppc64_elf_unhandled_reloc, /* special_function */
1479 "R_PPC64_TPREL16_HA", /* name */
1480 FALSE, /* partial_inplace */
1481 0, /* src_mask */
1482 0xffff, /* dst_mask */
1483 FALSE), /* pcrel_offset */
1484
1485 /* Like TPREL16_HI, but next higher group of 16 bits. */
1486 HOWTO (R_PPC64_TPREL16_HIGHER,
1487 32, /* rightshift */
1488 1, /* size (0 = byte, 1 = short, 2 = long) */
1489 16, /* bitsize */
1490 FALSE, /* pc_relative */
1491 0, /* bitpos */
1492 complain_overflow_dont, /* complain_on_overflow */
1493 ppc64_elf_unhandled_reloc, /* special_function */
1494 "R_PPC64_TPREL16_HIGHER", /* name */
1495 FALSE, /* partial_inplace */
1496 0, /* src_mask */
1497 0xffff, /* dst_mask */
1498 FALSE), /* pcrel_offset */
1499
1500 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1501 HOWTO (R_PPC64_TPREL16_HIGHERA,
1502 32, /* rightshift */
1503 1, /* size (0 = byte, 1 = short, 2 = long) */
1504 16, /* bitsize */
1505 FALSE, /* pc_relative */
1506 0, /* bitpos */
1507 complain_overflow_dont, /* complain_on_overflow */
1508 ppc64_elf_unhandled_reloc, /* special_function */
1509 "R_PPC64_TPREL16_HIGHERA", /* name */
1510 FALSE, /* partial_inplace */
1511 0, /* src_mask */
1512 0xffff, /* dst_mask */
1513 FALSE), /* pcrel_offset */
1514
1515 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1516 HOWTO (R_PPC64_TPREL16_HIGHEST,
1517 48, /* rightshift */
1518 1, /* size (0 = byte, 1 = short, 2 = long) */
1519 16, /* bitsize */
1520 FALSE, /* pc_relative */
1521 0, /* bitpos */
1522 complain_overflow_dont, /* complain_on_overflow */
1523 ppc64_elf_unhandled_reloc, /* special_function */
1524 "R_PPC64_TPREL16_HIGHEST", /* name */
1525 FALSE, /* partial_inplace */
1526 0, /* src_mask */
1527 0xffff, /* dst_mask */
1528 FALSE), /* pcrel_offset */
1529
1530 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1531 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1532 48, /* rightshift */
1533 1, /* size (0 = byte, 1 = short, 2 = long) */
1534 16, /* bitsize */
1535 FALSE, /* pc_relative */
1536 0, /* bitpos */
1537 complain_overflow_dont, /* complain_on_overflow */
1538 ppc64_elf_unhandled_reloc, /* special_function */
1539 "R_PPC64_TPREL16_HIGHESTA", /* name */
1540 FALSE, /* partial_inplace */
1541 0, /* src_mask */
1542 0xffff, /* dst_mask */
1543 FALSE), /* pcrel_offset */
1544
1545 /* Like TPREL16, but for insns with a DS field. */
1546 HOWTO (R_PPC64_TPREL16_DS,
1547 0, /* rightshift */
1548 1, /* size (0 = byte, 1 = short, 2 = long) */
1549 16, /* bitsize */
1550 FALSE, /* pc_relative */
1551 0, /* bitpos */
1552 complain_overflow_signed, /* complain_on_overflow */
1553 ppc64_elf_unhandled_reloc, /* special_function */
1554 "R_PPC64_TPREL16_DS", /* name */
1555 FALSE, /* partial_inplace */
1556 0, /* src_mask */
1557 0xfffc, /* dst_mask */
1558 FALSE), /* pcrel_offset */
1559
1560 /* Like TPREL16_DS, but no overflow. */
1561 HOWTO (R_PPC64_TPREL16_LO_DS,
1562 0, /* rightshift */
1563 1, /* size (0 = byte, 1 = short, 2 = long) */
1564 16, /* bitsize */
1565 FALSE, /* pc_relative */
1566 0, /* bitpos */
1567 complain_overflow_dont, /* complain_on_overflow */
1568 ppc64_elf_unhandled_reloc, /* special_function */
1569 "R_PPC64_TPREL16_LO_DS", /* name */
1570 FALSE, /* partial_inplace */
1571 0, /* src_mask */
1572 0xfffc, /* dst_mask */
1573 FALSE), /* pcrel_offset */
1574
1575 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1576 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1577 to the first entry relative to the TOC base (r2). */
1578 HOWTO (R_PPC64_GOT_TLSGD16,
1579 0, /* rightshift */
1580 1, /* size (0 = byte, 1 = short, 2 = long) */
1581 16, /* bitsize */
1582 FALSE, /* pc_relative */
1583 0, /* bitpos */
1584 complain_overflow_signed, /* complain_on_overflow */
1585 ppc64_elf_unhandled_reloc, /* special_function */
1586 "R_PPC64_GOT_TLSGD16", /* name */
1587 FALSE, /* partial_inplace */
1588 0, /* src_mask */
1589 0xffff, /* dst_mask */
1590 FALSE), /* pcrel_offset */
1591
1592 /* Like GOT_TLSGD16, but no overflow. */
1593 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1594 0, /* rightshift */
1595 1, /* size (0 = byte, 1 = short, 2 = long) */
1596 16, /* bitsize */
1597 FALSE, /* pc_relative */
1598 0, /* bitpos */
1599 complain_overflow_dont, /* complain_on_overflow */
1600 ppc64_elf_unhandled_reloc, /* special_function */
1601 "R_PPC64_GOT_TLSGD16_LO", /* name */
1602 FALSE, /* partial_inplace */
1603 0, /* src_mask */
1604 0xffff, /* dst_mask */
1605 FALSE), /* pcrel_offset */
1606
1607 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1608 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1609 16, /* rightshift */
1610 1, /* size (0 = byte, 1 = short, 2 = long) */
1611 16, /* bitsize */
1612 FALSE, /* pc_relative */
1613 0, /* bitpos */
1614 complain_overflow_dont, /* complain_on_overflow */
1615 ppc64_elf_unhandled_reloc, /* special_function */
1616 "R_PPC64_GOT_TLSGD16_HI", /* name */
1617 FALSE, /* partial_inplace */
1618 0, /* src_mask */
1619 0xffff, /* dst_mask */
1620 FALSE), /* pcrel_offset */
1621
1622 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1623 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1624 16, /* rightshift */
1625 1, /* size (0 = byte, 1 = short, 2 = long) */
1626 16, /* bitsize */
1627 FALSE, /* pc_relative */
1628 0, /* bitpos */
1629 complain_overflow_dont, /* complain_on_overflow */
1630 ppc64_elf_unhandled_reloc, /* special_function */
1631 "R_PPC64_GOT_TLSGD16_HA", /* name */
1632 FALSE, /* partial_inplace */
1633 0, /* src_mask */
1634 0xffff, /* dst_mask */
1635 FALSE), /* pcrel_offset */
1636
1637 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1638 with values (sym+add)@dtpmod and zero, and computes the offset to the
1639 first entry relative to the TOC base (r2). */
1640 HOWTO (R_PPC64_GOT_TLSLD16,
1641 0, /* rightshift */
1642 1, /* size (0 = byte, 1 = short, 2 = long) */
1643 16, /* bitsize */
1644 FALSE, /* pc_relative */
1645 0, /* bitpos */
1646 complain_overflow_signed, /* complain_on_overflow */
1647 ppc64_elf_unhandled_reloc, /* special_function */
1648 "R_PPC64_GOT_TLSLD16", /* name */
1649 FALSE, /* partial_inplace */
1650 0, /* src_mask */
1651 0xffff, /* dst_mask */
1652 FALSE), /* pcrel_offset */
1653
1654 /* Like GOT_TLSLD16, but no overflow. */
1655 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1656 0, /* rightshift */
1657 1, /* size (0 = byte, 1 = short, 2 = long) */
1658 16, /* bitsize */
1659 FALSE, /* pc_relative */
1660 0, /* bitpos */
1661 complain_overflow_dont, /* complain_on_overflow */
1662 ppc64_elf_unhandled_reloc, /* special_function */
1663 "R_PPC64_GOT_TLSLD16_LO", /* name */
1664 FALSE, /* partial_inplace */
1665 0, /* src_mask */
1666 0xffff, /* dst_mask */
1667 FALSE), /* pcrel_offset */
1668
1669 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1670 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1671 16, /* rightshift */
1672 1, /* size (0 = byte, 1 = short, 2 = long) */
1673 16, /* bitsize */
1674 FALSE, /* pc_relative */
1675 0, /* bitpos */
1676 complain_overflow_dont, /* complain_on_overflow */
1677 ppc64_elf_unhandled_reloc, /* special_function */
1678 "R_PPC64_GOT_TLSLD16_HI", /* name */
1679 FALSE, /* partial_inplace */
1680 0, /* src_mask */
1681 0xffff, /* dst_mask */
1682 FALSE), /* pcrel_offset */
1683
1684 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1685 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1686 16, /* rightshift */
1687 1, /* size (0 = byte, 1 = short, 2 = long) */
1688 16, /* bitsize */
1689 FALSE, /* pc_relative */
1690 0, /* bitpos */
1691 complain_overflow_dont, /* complain_on_overflow */
1692 ppc64_elf_unhandled_reloc, /* special_function */
1693 "R_PPC64_GOT_TLSLD16_HA", /* name */
1694 FALSE, /* partial_inplace */
1695 0, /* src_mask */
1696 0xffff, /* dst_mask */
1697 FALSE), /* pcrel_offset */
1698
1699 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1700 the offset to the entry relative to the TOC base (r2). */
1701 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1702 0, /* rightshift */
1703 1, /* size (0 = byte, 1 = short, 2 = long) */
1704 16, /* bitsize */
1705 FALSE, /* pc_relative */
1706 0, /* bitpos */
1707 complain_overflow_signed, /* complain_on_overflow */
1708 ppc64_elf_unhandled_reloc, /* special_function */
1709 "R_PPC64_GOT_DTPREL16_DS", /* name */
1710 FALSE, /* partial_inplace */
1711 0, /* src_mask */
1712 0xfffc, /* dst_mask */
1713 FALSE), /* pcrel_offset */
1714
1715 /* Like GOT_DTPREL16_DS, but no overflow. */
1716 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1717 0, /* rightshift */
1718 1, /* size (0 = byte, 1 = short, 2 = long) */
1719 16, /* bitsize */
1720 FALSE, /* pc_relative */
1721 0, /* bitpos */
1722 complain_overflow_dont, /* complain_on_overflow */
1723 ppc64_elf_unhandled_reloc, /* special_function */
1724 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1725 FALSE, /* partial_inplace */
1726 0, /* src_mask */
1727 0xfffc, /* dst_mask */
1728 FALSE), /* pcrel_offset */
1729
1730 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1731 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1732 16, /* rightshift */
1733 1, /* size (0 = byte, 1 = short, 2 = long) */
1734 16, /* bitsize */
1735 FALSE, /* pc_relative */
1736 0, /* bitpos */
1737 complain_overflow_dont, /* complain_on_overflow */
1738 ppc64_elf_unhandled_reloc, /* special_function */
1739 "R_PPC64_GOT_DTPREL16_HI", /* name */
1740 FALSE, /* partial_inplace */
1741 0, /* src_mask */
1742 0xffff, /* dst_mask */
1743 FALSE), /* pcrel_offset */
1744
1745 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1746 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1747 16, /* rightshift */
1748 1, /* size (0 = byte, 1 = short, 2 = long) */
1749 16, /* bitsize */
1750 FALSE, /* pc_relative */
1751 0, /* bitpos */
1752 complain_overflow_dont, /* complain_on_overflow */
1753 ppc64_elf_unhandled_reloc, /* special_function */
1754 "R_PPC64_GOT_DTPREL16_HA", /* name */
1755 FALSE, /* partial_inplace */
1756 0, /* src_mask */
1757 0xffff, /* dst_mask */
1758 FALSE), /* pcrel_offset */
1759
1760 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1761 offset to the entry relative to the TOC base (r2). */
1762 HOWTO (R_PPC64_GOT_TPREL16_DS,
1763 0, /* rightshift */
1764 1, /* size (0 = byte, 1 = short, 2 = long) */
1765 16, /* bitsize */
1766 FALSE, /* pc_relative */
1767 0, /* bitpos */
1768 complain_overflow_signed, /* complain_on_overflow */
1769 ppc64_elf_unhandled_reloc, /* special_function */
1770 "R_PPC64_GOT_TPREL16_DS", /* name */
1771 FALSE, /* partial_inplace */
1772 0, /* src_mask */
1773 0xfffc, /* dst_mask */
1774 FALSE), /* pcrel_offset */
1775
1776 /* Like GOT_TPREL16_DS, but no overflow. */
1777 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1778 0, /* rightshift */
1779 1, /* size (0 = byte, 1 = short, 2 = long) */
1780 16, /* bitsize */
1781 FALSE, /* pc_relative */
1782 0, /* bitpos */
1783 complain_overflow_dont, /* complain_on_overflow */
1784 ppc64_elf_unhandled_reloc, /* special_function */
1785 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1786 FALSE, /* partial_inplace */
1787 0, /* src_mask */
1788 0xfffc, /* dst_mask */
1789 FALSE), /* pcrel_offset */
1790
1791 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1792 HOWTO (R_PPC64_GOT_TPREL16_HI,
1793 16, /* rightshift */
1794 1, /* size (0 = byte, 1 = short, 2 = long) */
1795 16, /* bitsize */
1796 FALSE, /* pc_relative */
1797 0, /* bitpos */
1798 complain_overflow_dont, /* complain_on_overflow */
1799 ppc64_elf_unhandled_reloc, /* special_function */
1800 "R_PPC64_GOT_TPREL16_HI", /* name */
1801 FALSE, /* partial_inplace */
1802 0, /* src_mask */
1803 0xffff, /* dst_mask */
1804 FALSE), /* pcrel_offset */
1805
1806 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1807 HOWTO (R_PPC64_GOT_TPREL16_HA,
1808 16, /* rightshift */
1809 1, /* size (0 = byte, 1 = short, 2 = long) */
1810 16, /* bitsize */
1811 FALSE, /* pc_relative */
1812 0, /* bitpos */
1813 complain_overflow_dont, /* complain_on_overflow */
1814 ppc64_elf_unhandled_reloc, /* special_function */
1815 "R_PPC64_GOT_TPREL16_HA", /* name */
1816 FALSE, /* partial_inplace */
1817 0, /* src_mask */
1818 0xffff, /* dst_mask */
1819 FALSE), /* pcrel_offset */
1820
1821 /* GNU extension to record C++ vtable hierarchy. */
1822 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1823 0, /* rightshift */
1824 0, /* size (0 = byte, 1 = short, 2 = long) */
1825 0, /* bitsize */
1826 FALSE, /* pc_relative */
1827 0, /* bitpos */
1828 complain_overflow_dont, /* complain_on_overflow */
1829 NULL, /* special_function */
1830 "R_PPC64_GNU_VTINHERIT", /* name */
1831 FALSE, /* partial_inplace */
1832 0, /* src_mask */
1833 0, /* dst_mask */
1834 FALSE), /* pcrel_offset */
1835
1836 /* GNU extension to record C++ vtable member usage. */
1837 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1838 0, /* rightshift */
1839 0, /* size (0 = byte, 1 = short, 2 = long) */
1840 0, /* bitsize */
1841 FALSE, /* pc_relative */
1842 0, /* bitpos */
1843 complain_overflow_dont, /* complain_on_overflow */
1844 NULL, /* special_function */
1845 "R_PPC64_GNU_VTENTRY", /* name */
1846 FALSE, /* partial_inplace */
1847 0, /* src_mask */
1848 0, /* dst_mask */
1849 FALSE), /* pcrel_offset */
1850 };
1851
1852
1853 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1854 be done. */
1855
1856 static void
ppc_howto_init(void)1857 ppc_howto_init (void)
1858 {
1859 unsigned int i, type;
1860
1861 for (i = 0;
1862 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
1863 i++)
1864 {
1865 type = ppc64_elf_howto_raw[i].type;
1866 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
1867 / sizeof (ppc64_elf_howto_table[0])));
1868 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
1869 }
1870 }
1871
1872 static reloc_howto_type *
ppc64_elf_reloc_type_lookup(bfd * abfd ATTRIBUTE_UNUSED,bfd_reloc_code_real_type code)1873 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1874 bfd_reloc_code_real_type code)
1875 {
1876 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
1877
1878 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
1879 /* Initialize howto table if needed. */
1880 ppc_howto_init ();
1881
1882 switch (code)
1883 {
1884 default:
1885 return NULL;
1886
1887 case BFD_RELOC_NONE: r = R_PPC64_NONE;
1888 break;
1889 case BFD_RELOC_32: r = R_PPC64_ADDR32;
1890 break;
1891 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
1892 break;
1893 case BFD_RELOC_16: r = R_PPC64_ADDR16;
1894 break;
1895 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
1896 break;
1897 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
1898 break;
1899 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
1900 break;
1901 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
1902 break;
1903 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
1904 break;
1905 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
1906 break;
1907 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
1908 break;
1909 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
1910 break;
1911 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
1912 break;
1913 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
1914 break;
1915 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
1916 break;
1917 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
1918 break;
1919 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
1920 break;
1921 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
1922 break;
1923 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
1924 break;
1925 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
1926 break;
1927 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
1928 break;
1929 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
1930 break;
1931 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
1932 break;
1933 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
1934 break;
1935 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
1936 break;
1937 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
1938 break;
1939 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
1940 break;
1941 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
1942 break;
1943 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
1944 break;
1945 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
1946 break;
1947 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
1948 break;
1949 case BFD_RELOC_64: r = R_PPC64_ADDR64;
1950 break;
1951 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
1952 break;
1953 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
1954 break;
1955 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
1956 break;
1957 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
1958 break;
1959 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
1960 break;
1961 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
1962 break;
1963 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
1964 break;
1965 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
1966 break;
1967 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
1968 break;
1969 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
1970 break;
1971 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
1972 break;
1973 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
1974 break;
1975 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
1976 break;
1977 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
1978 break;
1979 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
1980 break;
1981 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
1982 break;
1983 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
1984 break;
1985 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
1986 break;
1987 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
1988 break;
1989 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
1990 break;
1991 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
1992 break;
1993 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
1994 break;
1995 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
1996 break;
1997 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
1998 break;
1999 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2000 break;
2001 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2002 break;
2003 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2004 break;
2005 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2006 break;
2007 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2008 break;
2009 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2010 break;
2011 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2012 break;
2013 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2014 break;
2015 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2016 break;
2017 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2018 break;
2019 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2020 break;
2021 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2022 break;
2023 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2024 break;
2025 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2026 break;
2027 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2028 break;
2029 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2030 break;
2031 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2032 break;
2033 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2034 break;
2035 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2036 break;
2037 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2038 break;
2039 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2040 break;
2041 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2042 break;
2043 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2044 break;
2045 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2046 break;
2047 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2048 break;
2049 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2050 break;
2051 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2052 break;
2053 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2054 break;
2055 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2056 break;
2057 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2058 break;
2059 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2060 break;
2061 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2062 break;
2063 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2064 break;
2065 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2066 break;
2067 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2068 break;
2069 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2070 break;
2071 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2072 break;
2073 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2074 break;
2075 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2076 break;
2077 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2078 break;
2079 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2080 break;
2081 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2082 break;
2083 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2084 break;
2085 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2086 break;
2087 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2088 break;
2089 }
2090
2091 return ppc64_elf_howto_table[r];
2092 };
2093
2094 /* Set the howto pointer for a PowerPC ELF reloc. */
2095
2096 static void
ppc64_elf_info_to_howto(bfd * abfd ATTRIBUTE_UNUSED,arelent * cache_ptr,Elf_Internal_Rela * dst)2097 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2098 Elf_Internal_Rela *dst)
2099 {
2100 unsigned int type;
2101
2102 /* Initialize howto table if needed. */
2103 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2104 ppc_howto_init ();
2105
2106 type = ELF64_R_TYPE (dst->r_info);
2107 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2108 / sizeof (ppc64_elf_howto_table[0])));
2109 cache_ptr->howto = ppc64_elf_howto_table[type];
2110 }
2111
2112 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2113
2114 static bfd_reloc_status_type
ppc64_elf_ha_reloc(bfd * abfd,arelent * reloc_entry,asymbol * symbol,void * data,asection * input_section,bfd * output_bfd,char ** error_message)2115 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2116 void *data, asection *input_section,
2117 bfd *output_bfd, char **error_message)
2118 {
2119 /* If this is a relocatable link (output_bfd test tells us), just
2120 call the generic function. Any adjustment will be done at final
2121 link time. */
2122 if (output_bfd != NULL)
2123 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2124 input_section, output_bfd, error_message);
2125
2126 /* Adjust the addend for sign extension of the low 16 bits.
2127 We won't actually be using the low 16 bits, so trashing them
2128 doesn't matter. */
2129 reloc_entry->addend += 0x8000;
2130 return bfd_reloc_continue;
2131 }
2132
2133 static bfd_reloc_status_type
ppc64_elf_brtaken_reloc(bfd * abfd,arelent * reloc_entry,asymbol * symbol,void * data,asection * input_section,bfd * output_bfd,char ** error_message)2134 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2135 void *data, asection *input_section,
2136 bfd *output_bfd, char **error_message)
2137 {
2138 long insn;
2139 enum elf_ppc64_reloc_type r_type;
2140 bfd_size_type octets;
2141 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2142 bfd_boolean is_power4 = FALSE;
2143
2144 /* If this is a relocatable link (output_bfd test tells us), just
2145 call the generic function. Any adjustment will be done at final
2146 link time. */
2147 if (output_bfd != NULL)
2148 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2149 input_section, output_bfd, error_message);
2150
2151 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2152 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2153 insn &= ~(0x01 << 21);
2154 r_type = reloc_entry->howto->type;
2155 if (r_type == R_PPC64_ADDR14_BRTAKEN
2156 || r_type == R_PPC64_REL14_BRTAKEN)
2157 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2158
2159 if (is_power4)
2160 {
2161 /* Set 'a' bit. This is 0b00010 in BO field for branch
2162 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2163 for branch on CTR insns (BO == 1a00t or 1a01t). */
2164 if ((insn & (0x14 << 21)) == (0x04 << 21))
2165 insn |= 0x02 << 21;
2166 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2167 insn |= 0x08 << 21;
2168 else
2169 return bfd_reloc_continue;
2170 }
2171 else
2172 {
2173 bfd_vma target = 0;
2174 bfd_vma from;
2175
2176 if (!bfd_is_com_section (symbol->section))
2177 target = symbol->value;
2178 target += symbol->section->output_section->vma;
2179 target += symbol->section->output_offset;
2180 target += reloc_entry->addend;
2181
2182 from = (reloc_entry->address
2183 + input_section->output_offset
2184 + input_section->output_section->vma);
2185
2186 /* Invert 'y' bit if not the default. */
2187 if ((bfd_signed_vma) (target - from) < 0)
2188 insn ^= 0x01 << 21;
2189 }
2190 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2191 return bfd_reloc_continue;
2192 }
2193
2194 static bfd_reloc_status_type
ppc64_elf_sectoff_reloc(bfd * abfd,arelent * reloc_entry,asymbol * symbol,void * data,asection * input_section,bfd * output_bfd,char ** error_message)2195 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2196 void *data, asection *input_section,
2197 bfd *output_bfd, char **error_message)
2198 {
2199 /* If this is a relocatable link (output_bfd test tells us), just
2200 call the generic function. Any adjustment will be done at final
2201 link time. */
2202 if (output_bfd != NULL)
2203 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2204 input_section, output_bfd, error_message);
2205
2206 /* Subtract the symbol section base address. */
2207 reloc_entry->addend -= symbol->section->output_section->vma;
2208 return bfd_reloc_continue;
2209 }
2210
2211 static bfd_reloc_status_type
ppc64_elf_sectoff_ha_reloc(bfd * abfd,arelent * reloc_entry,asymbol * symbol,void * data,asection * input_section,bfd * output_bfd,char ** error_message)2212 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2213 void *data, asection *input_section,
2214 bfd *output_bfd, char **error_message)
2215 {
2216 /* If this is a relocatable link (output_bfd test tells us), just
2217 call the generic function. Any adjustment will be done at final
2218 link time. */
2219 if (output_bfd != NULL)
2220 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2221 input_section, output_bfd, error_message);
2222
2223 /* Subtract the symbol section base address. */
2224 reloc_entry->addend -= symbol->section->output_section->vma;
2225
2226 /* Adjust the addend for sign extension of the low 16 bits. */
2227 reloc_entry->addend += 0x8000;
2228 return bfd_reloc_continue;
2229 }
2230
2231 static bfd_reloc_status_type
ppc64_elf_toc_reloc(bfd * abfd,arelent * reloc_entry,asymbol * symbol,void * data,asection * input_section,bfd * output_bfd,char ** error_message)2232 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2233 void *data, asection *input_section,
2234 bfd *output_bfd, char **error_message)
2235 {
2236 bfd_vma TOCstart;
2237
2238 /* If this is a relocatable link (output_bfd test tells us), just
2239 call the generic function. Any adjustment will be done at final
2240 link time. */
2241 if (output_bfd != NULL)
2242 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2243 input_section, output_bfd, error_message);
2244
2245 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2246 if (TOCstart == 0)
2247 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2248
2249 /* Subtract the TOC base address. */
2250 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2251 return bfd_reloc_continue;
2252 }
2253
2254 static bfd_reloc_status_type
ppc64_elf_toc_ha_reloc(bfd * abfd,arelent * reloc_entry,asymbol * symbol,void * data,asection * input_section,bfd * output_bfd,char ** error_message)2255 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2256 void *data, asection *input_section,
2257 bfd *output_bfd, char **error_message)
2258 {
2259 bfd_vma TOCstart;
2260
2261 /* If this is a relocatable link (output_bfd test tells us), just
2262 call the generic function. Any adjustment will be done at final
2263 link time. */
2264 if (output_bfd != NULL)
2265 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2266 input_section, output_bfd, error_message);
2267
2268 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2269 if (TOCstart == 0)
2270 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2271
2272 /* Subtract the TOC base address. */
2273 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2274
2275 /* Adjust the addend for sign extension of the low 16 bits. */
2276 reloc_entry->addend += 0x8000;
2277 return bfd_reloc_continue;
2278 }
2279
2280 static bfd_reloc_status_type
ppc64_elf_toc64_reloc(bfd * abfd,arelent * reloc_entry,asymbol * symbol,void * data,asection * input_section,bfd * output_bfd,char ** error_message)2281 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2282 void *data, asection *input_section,
2283 bfd *output_bfd, char **error_message)
2284 {
2285 bfd_vma TOCstart;
2286 bfd_size_type octets;
2287
2288 /* If this is a relocatable link (output_bfd test tells us), just
2289 call the generic function. Any adjustment will be done at final
2290 link time. */
2291 if (output_bfd != NULL)
2292 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2293 input_section, output_bfd, error_message);
2294
2295 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2296 if (TOCstart == 0)
2297 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2298
2299 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2300 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2301 return bfd_reloc_ok;
2302 }
2303
2304 static bfd_reloc_status_type
ppc64_elf_unhandled_reloc(bfd * abfd,arelent * reloc_entry,asymbol * symbol,void * data,asection * input_section,bfd * output_bfd,char ** error_message)2305 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2306 void *data, asection *input_section,
2307 bfd *output_bfd, char **error_message)
2308 {
2309 /* If this is a relocatable link (output_bfd test tells us), just
2310 call the generic function. Any adjustment will be done at final
2311 link time. */
2312 if (output_bfd != NULL)
2313 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2314 input_section, output_bfd, error_message);
2315
2316 if (error_message != NULL)
2317 {
2318 static char buf[60];
2319 sprintf (buf, "generic linker can't handle %s",
2320 reloc_entry->howto->name);
2321 *error_message = buf;
2322 }
2323 return bfd_reloc_dangerous;
2324 }
2325
2326 struct ppc64_elf_obj_tdata
2327 {
2328 struct elf_obj_tdata elf;
2329
2330 /* Shortcuts to dynamic linker sections. */
2331 asection *got;
2332 asection *relgot;
2333
2334 /* TLS local dynamic got entry handling. Suppose for multiple GOT
2335 sections means we potentially need one of these for each input bfd. */
2336 union {
2337 bfd_signed_vma refcount;
2338 bfd_vma offset;
2339 } tlsld_got;
2340 };
2341
2342 #define ppc64_elf_tdata(bfd) \
2343 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2344
2345 #define ppc64_tlsld_got(bfd) \
2346 (&ppc64_elf_tdata (bfd)->tlsld_got)
2347
2348 /* Override the generic function because we store some extras. */
2349
2350 static bfd_boolean
ppc64_elf_mkobject(bfd * abfd)2351 ppc64_elf_mkobject (bfd *abfd)
2352 {
2353 bfd_size_type amt = sizeof (struct ppc64_elf_obj_tdata);
2354 abfd->tdata.any = bfd_zalloc (abfd, amt);
2355 if (abfd->tdata.any == NULL)
2356 return FALSE;
2357 return TRUE;
2358 }
2359
2360 /* Fix bad default arch selected for a 64 bit input bfd when the
2361 default is 32 bit. */
2362
2363 static bfd_boolean
ppc64_elf_object_p(bfd * abfd)2364 ppc64_elf_object_p (bfd *abfd)
2365 {
2366 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2367 {
2368 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2369
2370 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2371 {
2372 /* Relies on arch after 32 bit default being 64 bit default. */
2373 abfd->arch_info = abfd->arch_info->next;
2374 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2375 }
2376 }
2377 return TRUE;
2378 }
2379
2380 /* Support for core dump NOTE sections. */
2381
2382 static bfd_boolean
ppc64_elf_grok_prstatus(bfd * abfd,Elf_Internal_Note * note)2383 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2384 {
2385 size_t offset, raw_size;
2386
2387 if (note->descsz != 504)
2388 return FALSE;
2389
2390 /* pr_cursig */
2391 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2392
2393 /* pr_pid */
2394 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
2395
2396 /* pr_reg */
2397 offset = 112;
2398 raw_size = 384;
2399
2400 /* Make a ".reg/999" section. */
2401 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2402 raw_size, note->descpos + offset);
2403 }
2404
2405 static bfd_boolean
ppc64_elf_grok_psinfo(bfd * abfd,Elf_Internal_Note * note)2406 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2407 {
2408 if (note->descsz != 136)
2409 return FALSE;
2410
2411 elf_tdata (abfd)->core_program
2412 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2413 elf_tdata (abfd)->core_command
2414 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2415
2416 return TRUE;
2417 }
2418
2419 /* Merge backend specific data from an object file to the output
2420 object file when linking. */
2421
2422 static bfd_boolean
ppc64_elf_merge_private_bfd_data(bfd * ibfd,bfd * obfd)2423 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2424 {
2425 /* Check if we have the same endianess. */
2426 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2427 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2428 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2429 {
2430 const char *msg;
2431
2432 if (bfd_big_endian (ibfd))
2433 msg = _("%s: compiled for a big endian system "
2434 "and target is little endian");
2435 else
2436 msg = _("%s: compiled for a little endian system "
2437 "and target is big endian");
2438
2439 (*_bfd_error_handler) (msg, bfd_archive_filename (ibfd));
2440
2441 bfd_set_error (bfd_error_wrong_format);
2442 return FALSE;
2443 }
2444
2445 return TRUE;
2446 }
2447
2448 /* Add extra PPC sections. */
2449
2450 static struct bfd_elf_special_section const ppc64_elf_special_sections[]=
2451 {
2452 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2453 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2454 { ".plt", 4, 0, SHT_NOBITS, 0 },
2455 { ".toc", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2456 { ".toc1", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2457 { ".tocbss", 7, 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2458 { NULL, 0, 0, 0, 0 }
2459 };
2460
2461 struct _ppc64_elf_section_data
2462 {
2463 struct bfd_elf_section_data elf;
2464
2465 /* An array with one entry for each opd function descriptor. */
2466 union
2467 {
2468 /* Points to the function code section for local opd entries. */
2469 asection **func_sec;
2470 /* After editing .opd, adjust references to opd local syms. */
2471 long *adjust;
2472 } opd;
2473
2474 /* An array for toc sections, indexed by offset/8.
2475 Specifies the relocation symbol index used at a given toc offset. */
2476 unsigned *t_symndx;
2477 };
2478
2479 #define ppc64_elf_section_data(sec) \
2480 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2481
2482 static bfd_boolean
ppc64_elf_new_section_hook(bfd * abfd,asection * sec)2483 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2484 {
2485 struct _ppc64_elf_section_data *sdata;
2486 bfd_size_type amt = sizeof (*sdata);
2487
2488 sdata = bfd_zalloc (abfd, amt);
2489 if (sdata == NULL)
2490 return FALSE;
2491 sec->used_by_bfd = sdata;
2492
2493 return _bfd_elf_new_section_hook (abfd, sec);
2494 }
2495
2496 /* The following functions are specific to the ELF linker, while
2497 functions above are used generally. Those named ppc64_elf_* are
2498 called by the main ELF linker code. They appear in this file more
2499 or less in the order in which they are called. eg.
2500 ppc64_elf_check_relocs is called early in the link process,
2501 ppc64_elf_finish_dynamic_sections is one of the last functions
2502 called.
2503
2504 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
2505 functions have both a function code symbol and a function descriptor
2506 symbol. A call to foo in a relocatable object file looks like:
2507
2508 . .text
2509 . x:
2510 . bl .foo
2511 . nop
2512
2513 The function definition in another object file might be:
2514
2515 . .section .opd
2516 . foo: .quad .foo
2517 . .quad .TOC.@tocbase
2518 . .quad 0
2519 .
2520 . .text
2521 . .foo: blr
2522
2523 When the linker resolves the call during a static link, the branch
2524 unsurprisingly just goes to .foo and the .opd information is unused.
2525 If the function definition is in a shared library, things are a little
2526 different: The call goes via a plt call stub, the opd information gets
2527 copied to the plt, and the linker patches the nop.
2528
2529 . x:
2530 . bl .foo_stub
2531 . ld 2,40(1)
2532 .
2533 .
2534 . .foo_stub:
2535 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
2536 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
2537 . std 2,40(1) # this is the general idea
2538 . ld 11,0(12)
2539 . ld 2,8(12)
2540 . mtctr 11
2541 . ld 11,16(12)
2542 . bctr
2543 .
2544 . .section .plt
2545 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
2546
2547 The "reloc ()" notation is supposed to indicate that the linker emits
2548 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
2549 copying.
2550
2551 What are the difficulties here? Well, firstly, the relocations
2552 examined by the linker in check_relocs are against the function code
2553 sym .foo, while the dynamic relocation in the plt is emitted against
2554 the function descriptor symbol, foo. Somewhere along the line, we need
2555 to carefully copy dynamic link information from one symbol to the other.
2556 Secondly, the generic part of the elf linker will make .foo a dynamic
2557 symbol as is normal for most other backends. We need foo dynamic
2558 instead, at least for an application final link. However, when
2559 creating a shared library containing foo, we need to have both symbols
2560 dynamic so that references to .foo are satisfied during the early
2561 stages of linking. Otherwise the linker might decide to pull in a
2562 definition from some other object, eg. a static library. */
2563
2564 /* The linker needs to keep track of the number of relocs that it
2565 decides to copy as dynamic relocs in check_relocs for each symbol.
2566 This is so that it can later discard them if they are found to be
2567 unnecessary. We store the information in a field extending the
2568 regular ELF linker hash table. */
2569
2570 struct ppc_dyn_relocs
2571 {
2572 struct ppc_dyn_relocs *next;
2573
2574 /* The input section of the reloc. */
2575 asection *sec;
2576
2577 /* Total number of relocs copied for the input section. */
2578 bfd_size_type count;
2579
2580 /* Number of pc-relative relocs copied for the input section. */
2581 bfd_size_type pc_count;
2582 };
2583
2584 /* Track GOT entries needed for a given symbol. We might need more
2585 than one got entry per symbol. */
2586 struct got_entry
2587 {
2588 struct got_entry *next;
2589
2590 /* The symbol addend that we'll be placing in the GOT. */
2591 bfd_vma addend;
2592
2593 /* Unlike other ELF targets, we use separate GOT entries for the same
2594 symbol referenced from different input files. This is to support
2595 automatic multiple TOC/GOT sections, where the TOC base can vary
2596 from one input file to another.
2597
2598 Point to the BFD owning this GOT entry. */
2599 bfd *owner;
2600
2601 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2602 TLS_TPREL or TLS_DTPREL for tls entries. */
2603 char tls_type;
2604
2605 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2606 union
2607 {
2608 bfd_signed_vma refcount;
2609 bfd_vma offset;
2610 } got;
2611 };
2612
2613 /* The same for PLT. */
2614 struct plt_entry
2615 {
2616 struct plt_entry *next;
2617
2618 bfd_vma addend;
2619
2620 union
2621 {
2622 bfd_signed_vma refcount;
2623 bfd_vma offset;
2624 } plt;
2625 };
2626
2627 /* Of those relocs that might be copied as dynamic relocs, this macro
2628 selects those that must be copied when linking a shared library,
2629 even when the symbol is local. */
2630
2631 #define MUST_BE_DYN_RELOC(RTYPE) \
2632 ((RTYPE) != R_PPC64_REL32 \
2633 && (RTYPE) != R_PPC64_REL64 \
2634 && (RTYPE) != R_PPC64_REL30)
2635
2636 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2637 copying dynamic variables from a shared lib into an app's dynbss
2638 section, and instead use a dynamic relocation to point into the
2639 shared lib. With code that gcc generates, it's vital that this be
2640 enabled; In the PowerPC64 ABI, the address of a function is actually
2641 the address of a function descriptor, which resides in the .opd
2642 section. gcc uses the descriptor directly rather than going via the
2643 GOT as some other ABI's do, which means that initialized function
2644 pointers must reference the descriptor. Thus, a function pointer
2645 initialized to the address of a function in a shared library will
2646 either require a copy reloc, or a dynamic reloc. Using a copy reloc
2647 redefines the function descriptor symbol to point to the copy. This
2648 presents a problem as a plt entry for that function is also
2649 initialized from the function descriptor symbol and the copy reloc
2650 may not be initialized first. */
2651 #define ELIMINATE_COPY_RELOCS 1
2652
2653 /* Section name for stubs is the associated section name plus this
2654 string. */
2655 #define STUB_SUFFIX ".stub"
2656
2657 /* Linker stubs.
2658 ppc_stub_long_branch:
2659 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
2660 destination, but a 24 bit branch in a stub section will reach.
2661 . b dest
2662
2663 ppc_stub_plt_branch:
2664 Similar to the above, but a 24 bit branch in the stub section won't
2665 reach its destination.
2666 . addis %r12,%r2,xxx@toc@ha
2667 . ld %r11,xxx@toc@l(%r12)
2668 . mtctr %r11
2669 . bctr
2670
2671 ppc_stub_plt_call:
2672 Used to call a function in a shared library.
2673 . addis %r12,%r2,xxx@toc@ha
2674 . std %r2,40(%r1)
2675 . ld %r11,xxx+0@toc@l(%r12)
2676 . ld %r2,xxx+8@toc@l(%r12)
2677 . mtctr %r11
2678 . ld %r11,xxx+16@toc@l(%r12)
2679 . bctr
2680
2681 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
2682 code to adjust the value and save r2 to support multiple toc sections.
2683 A ppc_stub_long_branch with an r2 offset looks like:
2684 . std %r2,40(%r1)
2685 . addis %r2,%r2,off@ha
2686 . addi %r2,%r2,off@l
2687 . b dest
2688
2689 A ppc_stub_plt_branch with an r2 offset looks like:
2690 . std %r2,40(%r1)
2691 . addis %r12,%r2,xxx@toc@ha
2692 . ld %r11,xxx@toc@l(%r12)
2693 . addis %r2,%r2,off@ha
2694 . addi %r2,%r2,off@l
2695 . mtctr %r11
2696 . bctr
2697 */
2698
2699 enum ppc_stub_type {
2700 ppc_stub_none,
2701 ppc_stub_long_branch,
2702 ppc_stub_long_branch_r2off,
2703 ppc_stub_plt_branch,
2704 ppc_stub_plt_branch_r2off,
2705 ppc_stub_plt_call
2706 };
2707
2708 struct ppc_stub_hash_entry {
2709
2710 /* Base hash table entry structure. */
2711 struct bfd_hash_entry root;
2712
2713 enum ppc_stub_type stub_type;
2714
2715 /* The stub section. */
2716 asection *stub_sec;
2717
2718 /* Offset within stub_sec of the beginning of this stub. */
2719 bfd_vma stub_offset;
2720
2721 /* Given the symbol's value and its section we can determine its final
2722 value when building the stubs (so the stub knows where to jump. */
2723 bfd_vma target_value;
2724 asection *target_section;
2725
2726 /* The symbol table entry, if any, that this was derived from. */
2727 struct ppc_link_hash_entry *h;
2728
2729 /* And the reloc addend that this was derived from. */
2730 bfd_vma addend;
2731
2732 /* Where this stub is being called from, or, in the case of combined
2733 stub sections, the first input section in the group. */
2734 asection *id_sec;
2735 };
2736
2737 struct ppc_branch_hash_entry {
2738
2739 /* Base hash table entry structure. */
2740 struct bfd_hash_entry root;
2741
2742 /* Offset within .branch_lt. */
2743 unsigned int offset;
2744
2745 /* Generation marker. */
2746 unsigned int iter;
2747 };
2748
2749 struct ppc_link_hash_entry
2750 {
2751 struct elf_link_hash_entry elf;
2752
2753 /* A pointer to the most recently used stub hash entry against this
2754 symbol. */
2755 struct ppc_stub_hash_entry *stub_cache;
2756
2757 /* Track dynamic relocs copied for this symbol. */
2758 struct ppc_dyn_relocs *dyn_relocs;
2759
2760 /* Link between function code and descriptor symbols. */
2761 struct elf_link_hash_entry *oh;
2762
2763 /* Flag function code and descriptor symbols. */
2764 unsigned int is_func:1;
2765 unsigned int is_func_descriptor:1;
2766 unsigned int is_entry:1;
2767
2768 /* Whether global opd sym has been adjusted or not. */
2769 unsigned int adjust_done:1;
2770
2771 /* Contexts in which symbol is used in the GOT (or TOC).
2772 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
2773 corresponding relocs are encountered during check_relocs.
2774 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2775 indicate the corresponding GOT entry type is not needed.
2776 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
2777 a TPREL one. We use a separate flag rather than setting TPREL
2778 just for convenience in distinguishing the two cases. */
2779 #define TLS_GD 1 /* GD reloc. */
2780 #define TLS_LD 2 /* LD reloc. */
2781 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2782 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2783 #define TLS_TLS 16 /* Any TLS reloc. */
2784 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
2785 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
2786 char tls_mask;
2787 };
2788
2789 /* ppc64 ELF linker hash table. */
2790
2791 struct ppc_link_hash_table
2792 {
2793 struct elf_link_hash_table elf;
2794
2795 /* The stub hash table. */
2796 struct bfd_hash_table stub_hash_table;
2797
2798 /* Another hash table for plt_branch stubs. */
2799 struct bfd_hash_table branch_hash_table;
2800
2801 /* Linker stub bfd. */
2802 bfd *stub_bfd;
2803
2804 /* Linker call-backs. */
2805 asection * (*add_stub_section) (const char *, asection *);
2806 void (*layout_sections_again) (void);
2807
2808 /* Array to keep track of which stub sections have been created, and
2809 information on stub grouping. */
2810 struct map_stub {
2811 /* This is the section to which stubs in the group will be attached. */
2812 asection *link_sec;
2813 /* The stub section. */
2814 asection *stub_sec;
2815 /* Along with elf_gp, specifies the TOC pointer used in this group. */
2816 bfd_vma toc_off;
2817 } *stub_group;
2818
2819 /* Support for multiple toc sections. */
2820 unsigned int no_multi_toc;
2821 unsigned int multi_toc_needed;
2822
2823 /* Temp used when calculating TOC pointers. */
2824 bfd_vma toc_curr;
2825
2826 /* Highest input section id. */
2827 int top_id;
2828
2829 /* Highest output section index. */
2830 int top_index;
2831
2832 /* List of input sections for each output section. */
2833 asection **input_list;
2834
2835 /* Short-cuts to get to dynamic linker sections. */
2836 asection *got;
2837 asection *plt;
2838 asection *relplt;
2839 asection *dynbss;
2840 asection *relbss;
2841 asection *glink;
2842 asection *sfpr;
2843 asection *brlt;
2844 asection *relbrlt;
2845
2846 /* Shortcut to .__tls_get_addr. */
2847 struct elf_link_hash_entry *tls_get_addr;
2848
2849 /* Statistics. */
2850 unsigned long stub_count[ppc_stub_plt_call];
2851
2852 /* Set if we should emit symbols for stubs. */
2853 unsigned int emit_stub_syms;
2854
2855 /* Set on error. */
2856 unsigned int stub_error;
2857
2858 /* Flag set when small branches are detected. Used to
2859 select suitable defaults for the stub group size. */
2860 unsigned int has_14bit_branch;
2861
2862 /* Set if we detect a reference undefined weak symbol. */
2863 unsigned int have_undefweak;
2864
2865 /* Incremented every time we size stubs. */
2866 unsigned int stub_iteration;
2867
2868 /* Small local sym to section mapping cache. */
2869 struct sym_sec_cache sym_sec;
2870 };
2871
2872 /* Get the ppc64 ELF linker hash table from a link_info structure. */
2873
2874 #define ppc_hash_table(p) \
2875 ((struct ppc_link_hash_table *) ((p)->hash))
2876
2877 #define ppc_stub_hash_lookup(table, string, create, copy) \
2878 ((struct ppc_stub_hash_entry *) \
2879 bfd_hash_lookup ((table), (string), (create), (copy)))
2880
2881 #define ppc_branch_hash_lookup(table, string, create, copy) \
2882 ((struct ppc_branch_hash_entry *) \
2883 bfd_hash_lookup ((table), (string), (create), (copy)))
2884
2885 /* Create an entry in the stub hash table. */
2886
2887 static struct bfd_hash_entry *
stub_hash_newfunc(struct bfd_hash_entry * entry,struct bfd_hash_table * table,const char * string)2888 stub_hash_newfunc (struct bfd_hash_entry *entry,
2889 struct bfd_hash_table *table,
2890 const char *string)
2891 {
2892 /* Allocate the structure if it has not already been allocated by a
2893 subclass. */
2894 if (entry == NULL)
2895 {
2896 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
2897 if (entry == NULL)
2898 return entry;
2899 }
2900
2901 /* Call the allocation method of the superclass. */
2902 entry = bfd_hash_newfunc (entry, table, string);
2903 if (entry != NULL)
2904 {
2905 struct ppc_stub_hash_entry *eh;
2906
2907 /* Initialize the local fields. */
2908 eh = (struct ppc_stub_hash_entry *) entry;
2909 eh->stub_type = ppc_stub_none;
2910 eh->stub_sec = NULL;
2911 eh->stub_offset = 0;
2912 eh->target_value = 0;
2913 eh->target_section = NULL;
2914 eh->h = NULL;
2915 eh->id_sec = NULL;
2916 }
2917
2918 return entry;
2919 }
2920
2921 /* Create an entry in the branch hash table. */
2922
2923 static struct bfd_hash_entry *
branch_hash_newfunc(struct bfd_hash_entry * entry,struct bfd_hash_table * table,const char * string)2924 branch_hash_newfunc (struct bfd_hash_entry *entry,
2925 struct bfd_hash_table *table,
2926 const char *string)
2927 {
2928 /* Allocate the structure if it has not already been allocated by a
2929 subclass. */
2930 if (entry == NULL)
2931 {
2932 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
2933 if (entry == NULL)
2934 return entry;
2935 }
2936
2937 /* Call the allocation method of the superclass. */
2938 entry = bfd_hash_newfunc (entry, table, string);
2939 if (entry != NULL)
2940 {
2941 struct ppc_branch_hash_entry *eh;
2942
2943 /* Initialize the local fields. */
2944 eh = (struct ppc_branch_hash_entry *) entry;
2945 eh->offset = 0;
2946 eh->iter = 0;
2947 }
2948
2949 return entry;
2950 }
2951
2952 /* Create an entry in a ppc64 ELF linker hash table. */
2953
2954 static struct bfd_hash_entry *
link_hash_newfunc(struct bfd_hash_entry * entry,struct bfd_hash_table * table,const char * string)2955 link_hash_newfunc (struct bfd_hash_entry *entry,
2956 struct bfd_hash_table *table,
2957 const char *string)
2958 {
2959 /* Allocate the structure if it has not already been allocated by a
2960 subclass. */
2961 if (entry == NULL)
2962 {
2963 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
2964 if (entry == NULL)
2965 return entry;
2966 }
2967
2968 /* Call the allocation method of the superclass. */
2969 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2970 if (entry != NULL)
2971 {
2972 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
2973
2974 eh->stub_cache = NULL;
2975 eh->dyn_relocs = NULL;
2976 eh->oh = NULL;
2977 eh->is_func = 0;
2978 eh->is_func_descriptor = 0;
2979 eh->is_entry = 0;
2980 eh->adjust_done = 0;
2981 eh->tls_mask = 0;
2982 }
2983
2984 return entry;
2985 }
2986
2987 /* Create a ppc64 ELF linker hash table. */
2988
2989 static struct bfd_link_hash_table *
ppc64_elf_link_hash_table_create(bfd * abfd)2990 ppc64_elf_link_hash_table_create (bfd *abfd)
2991 {
2992 struct ppc_link_hash_table *htab;
2993 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
2994
2995 htab = bfd_zmalloc (amt);
2996 if (htab == NULL)
2997 return NULL;
2998
2999 if (! _bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc))
3000 {
3001 free (htab);
3002 return NULL;
3003 }
3004
3005 /* Init the stub hash table too. */
3006 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc))
3007 return NULL;
3008
3009 /* And the branch hash table. */
3010 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc))
3011 return NULL;
3012
3013 /* Initializing two fields of the union is just cosmetic. We really
3014 only care about glist, but when compiled on a 32-bit host the
3015 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3016 debugger inspection of these fields look nicer. */
3017 htab->elf.init_refcount.refcount = 0;
3018 htab->elf.init_refcount.glist = NULL;
3019 htab->elf.init_offset.offset = 0;
3020 htab->elf.init_offset.glist = NULL;
3021
3022 return &htab->elf.root;
3023 }
3024
3025 /* Free the derived linker hash table. */
3026
3027 static void
ppc64_elf_link_hash_table_free(struct bfd_link_hash_table * hash)3028 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3029 {
3030 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3031
3032 bfd_hash_table_free (&ret->stub_hash_table);
3033 bfd_hash_table_free (&ret->branch_hash_table);
3034 _bfd_generic_link_hash_table_free (hash);
3035 }
3036
3037 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3038
3039 void
ppc64_elf_init_stub_bfd(bfd * abfd,struct bfd_link_info * info)3040 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3041 {
3042 struct ppc_link_hash_table *htab;
3043
3044 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3045
3046 /* Always hook our dynamic sections into the first bfd, which is the
3047 linker created stub bfd. This ensures that the GOT header is at
3048 the start of the output TOC section. */
3049 htab = ppc_hash_table (info);
3050 htab->stub_bfd = abfd;
3051 htab->elf.dynobj = abfd;
3052 }
3053
3054 /* Build a name for an entry in the stub hash table. */
3055
3056 static char *
ppc_stub_name(const asection * input_section,const asection * sym_sec,const struct ppc_link_hash_entry * h,const Elf_Internal_Rela * rel)3057 ppc_stub_name (const asection *input_section,
3058 const asection *sym_sec,
3059 const struct ppc_link_hash_entry *h,
3060 const Elf_Internal_Rela *rel)
3061 {
3062 char *stub_name;
3063 bfd_size_type len;
3064
3065 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3066 offsets from a sym as a branch target? In fact, we could
3067 probably assume the addend is always zero. */
3068 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3069
3070 if (h)
3071 {
3072 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3073 stub_name = bfd_malloc (len);
3074 if (stub_name != NULL)
3075 {
3076 sprintf (stub_name, "%08x.%s+%x",
3077 input_section->id & 0xffffffff,
3078 h->elf.root.root.string,
3079 (int) rel->r_addend & 0xffffffff);
3080 }
3081 }
3082 else
3083 {
3084 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3085 stub_name = bfd_malloc (len);
3086 if (stub_name != NULL)
3087 {
3088 sprintf (stub_name, "%08x.%x:%x+%x",
3089 input_section->id & 0xffffffff,
3090 sym_sec->id & 0xffffffff,
3091 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3092 (int) rel->r_addend & 0xffffffff);
3093 }
3094 }
3095 return stub_name;
3096 }
3097
3098 /* Look up an entry in the stub hash. Stub entries are cached because
3099 creating the stub name takes a bit of time. */
3100
3101 static struct ppc_stub_hash_entry *
ppc_get_stub_entry(const asection * input_section,const asection * sym_sec,struct elf_link_hash_entry * hash,const Elf_Internal_Rela * rel,struct ppc_link_hash_table * htab)3102 ppc_get_stub_entry (const asection *input_section,
3103 const asection *sym_sec,
3104 struct elf_link_hash_entry *hash,
3105 const Elf_Internal_Rela *rel,
3106 struct ppc_link_hash_table *htab)
3107 {
3108 struct ppc_stub_hash_entry *stub_entry;
3109 struct ppc_link_hash_entry *h = (struct ppc_link_hash_entry *) hash;
3110 const asection *id_sec;
3111
3112 /* If this input section is part of a group of sections sharing one
3113 stub section, then use the id of the first section in the group.
3114 Stub names need to include a section id, as there may well be
3115 more than one stub used to reach say, printf, and we need to
3116 distinguish between them. */
3117 id_sec = htab->stub_group[input_section->id].link_sec;
3118
3119 if (h != NULL && h->stub_cache != NULL
3120 && h->stub_cache->h == h
3121 && h->stub_cache->id_sec == id_sec)
3122 {
3123 stub_entry = h->stub_cache;
3124 }
3125 else
3126 {
3127 char *stub_name;
3128
3129 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
3130 if (stub_name == NULL)
3131 return NULL;
3132
3133 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3134 stub_name, FALSE, FALSE);
3135 if (h != NULL)
3136 h->stub_cache = stub_entry;
3137
3138 free (stub_name);
3139 }
3140
3141 return stub_entry;
3142 }
3143
3144 /* Add a new stub entry to the stub hash. Not all fields of the new
3145 stub entry are initialised. */
3146
3147 static struct ppc_stub_hash_entry *
ppc_add_stub(const char * stub_name,asection * section,struct ppc_link_hash_table * htab)3148 ppc_add_stub (const char *stub_name,
3149 asection *section,
3150 struct ppc_link_hash_table *htab)
3151 {
3152 asection *link_sec;
3153 asection *stub_sec;
3154 struct ppc_stub_hash_entry *stub_entry;
3155
3156 link_sec = htab->stub_group[section->id].link_sec;
3157 stub_sec = htab->stub_group[section->id].stub_sec;
3158 if (stub_sec == NULL)
3159 {
3160 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3161 if (stub_sec == NULL)
3162 {
3163 size_t namelen;
3164 bfd_size_type len;
3165 char *s_name;
3166
3167 namelen = strlen (link_sec->name);
3168 len = namelen + sizeof (STUB_SUFFIX);
3169 s_name = bfd_alloc (htab->stub_bfd, len);
3170 if (s_name == NULL)
3171 return NULL;
3172
3173 memcpy (s_name, link_sec->name, namelen);
3174 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3175 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3176 if (stub_sec == NULL)
3177 return NULL;
3178 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3179 }
3180 htab->stub_group[section->id].stub_sec = stub_sec;
3181 }
3182
3183 /* Enter this entry into the linker stub hash table. */
3184 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3185 TRUE, FALSE);
3186 if (stub_entry == NULL)
3187 {
3188 (*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
3189 bfd_archive_filename (section->owner),
3190 stub_name);
3191 return NULL;
3192 }
3193
3194 stub_entry->stub_sec = stub_sec;
3195 stub_entry->stub_offset = 0;
3196 stub_entry->id_sec = link_sec;
3197 return stub_entry;
3198 }
3199
3200 /* Create sections for linker generated code. */
3201
3202 static bfd_boolean
create_linkage_sections(bfd * dynobj,struct bfd_link_info * info)3203 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
3204 {
3205 struct ppc_link_hash_table *htab;
3206 flagword flags;
3207
3208 htab = ppc_hash_table (info);
3209
3210 /* Create .sfpr for code to save and restore fp regs. */
3211 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
3212 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3213 htab->sfpr = bfd_make_section_anyway (dynobj, ".sfpr");
3214 if (htab->sfpr == NULL
3215 || ! bfd_set_section_flags (dynobj, htab->sfpr, flags)
3216 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
3217 return FALSE;
3218
3219 /* Create .glink for lazy dynamic linking support. */
3220 htab->glink = bfd_make_section_anyway (dynobj, ".glink");
3221 if (htab->glink == NULL
3222 || ! bfd_set_section_flags (dynobj, htab->glink, flags)
3223 || ! bfd_set_section_alignment (dynobj, htab->glink, 2))
3224 return FALSE;
3225
3226 /* Create .branch_lt for plt_branch stubs. */
3227 flags = (SEC_ALLOC | SEC_LOAD
3228 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3229 htab->brlt = bfd_make_section_anyway (dynobj, ".branch_lt");
3230 if (htab->brlt == NULL
3231 || ! bfd_set_section_flags (dynobj, htab->brlt, flags)
3232 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
3233 return FALSE;
3234
3235 if (info->shared)
3236 {
3237 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3238 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3239 htab->relbrlt = bfd_make_section_anyway (dynobj, ".rela.branch_lt");
3240 if (!htab->relbrlt
3241 || ! bfd_set_section_flags (dynobj, htab->relbrlt, flags)
3242 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
3243 return FALSE;
3244 }
3245 return TRUE;
3246 }
3247
3248 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
3249 not already done. */
3250
3251 static bfd_boolean
create_got_section(bfd * abfd,struct bfd_link_info * info)3252 create_got_section (bfd *abfd, struct bfd_link_info *info)
3253 {
3254 asection *got, *relgot;
3255 flagword flags;
3256 struct ppc_link_hash_table *htab = ppc_hash_table (info);
3257
3258 if (!htab->got)
3259 {
3260 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
3261 return FALSE;
3262
3263 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
3264 if (!htab->got)
3265 abort ();
3266 }
3267
3268 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3269 | SEC_LINKER_CREATED);
3270
3271 got = bfd_make_section (abfd, ".got");
3272 if (!got
3273 || !bfd_set_section_flags (abfd, got, flags)
3274 || !bfd_set_section_alignment (abfd, got, 3))
3275 return FALSE;
3276
3277 relgot = bfd_make_section (abfd, ".rela.got");
3278 if (!relgot
3279 || ! bfd_set_section_flags (abfd, relgot, flags | SEC_READONLY)
3280 || ! bfd_set_section_alignment (abfd, relgot, 3))
3281 return FALSE;
3282
3283 ppc64_elf_tdata (abfd)->got = got;
3284 ppc64_elf_tdata (abfd)->relgot = relgot;
3285 return TRUE;
3286 }
3287
3288 /* Create the dynamic sections, and set up shortcuts. */
3289
3290 static bfd_boolean
ppc64_elf_create_dynamic_sections(bfd * dynobj,struct bfd_link_info * info)3291 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
3292 {
3293 struct ppc_link_hash_table *htab;
3294
3295 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
3296 return FALSE;
3297
3298 htab = ppc_hash_table (info);
3299 if (!htab->got)
3300 htab->got = bfd_get_section_by_name (dynobj, ".got");
3301 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
3302 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
3303 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
3304 if (!info->shared)
3305 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
3306
3307 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
3308 || (!info->shared && !htab->relbss))
3309 abort ();
3310
3311 return TRUE;
3312 }
3313
3314 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3315
3316 static void
ppc64_elf_copy_indirect_symbol(const struct elf_backend_data * bed ATTRIBUTE_UNUSED,struct elf_link_hash_entry * dir,struct elf_link_hash_entry * ind)3317 ppc64_elf_copy_indirect_symbol
3318 (const struct elf_backend_data *bed ATTRIBUTE_UNUSED,
3319 struct elf_link_hash_entry *dir,
3320 struct elf_link_hash_entry *ind)
3321 {
3322 struct ppc_link_hash_entry *edir, *eind;
3323 flagword mask;
3324
3325 edir = (struct ppc_link_hash_entry *) dir;
3326 eind = (struct ppc_link_hash_entry *) ind;
3327
3328 /* Copy over any dynamic relocs we may have on the indirect sym. */
3329 if (eind->dyn_relocs != NULL)
3330 {
3331 if (edir->dyn_relocs != NULL)
3332 {
3333 struct ppc_dyn_relocs **pp;
3334 struct ppc_dyn_relocs *p;
3335
3336 if (eind->elf.root.type == bfd_link_hash_indirect)
3337 abort ();
3338
3339 /* Add reloc counts against the weak sym to the strong sym
3340 list. Merge any entries against the same section. */
3341 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3342 {
3343 struct ppc_dyn_relocs *q;
3344
3345 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3346 if (q->sec == p->sec)
3347 {
3348 q->pc_count += p->pc_count;
3349 q->count += p->count;
3350 *pp = p->next;
3351 break;
3352 }
3353 if (q == NULL)
3354 pp = &p->next;
3355 }
3356 *pp = edir->dyn_relocs;
3357 }
3358
3359 edir->dyn_relocs = eind->dyn_relocs;
3360 eind->dyn_relocs = NULL;
3361 }
3362
3363 edir->is_func |= eind->is_func;
3364 edir->is_func_descriptor |= eind->is_func_descriptor;
3365 edir->is_entry |= eind->is_entry;
3366 edir->tls_mask |= eind->tls_mask;
3367
3368 mask = (ELF_LINK_HASH_REF_DYNAMIC | ELF_LINK_HASH_REF_REGULAR
3369 | ELF_LINK_HASH_REF_REGULAR_NONWEAK | ELF_LINK_NON_GOT_REF
3370 | ELF_LINK_HASH_NEEDS_PLT);
3371 /* If called to transfer flags for a weakdef during processing
3372 of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF.
3373 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3374 if (ELIMINATE_COPY_RELOCS
3375 && eind->elf.root.type != bfd_link_hash_indirect
3376 && (edir->elf.elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0)
3377 mask &= ~ELF_LINK_NON_GOT_REF;
3378
3379 edir->elf.elf_link_hash_flags |= eind->elf.elf_link_hash_flags & mask;
3380
3381 /* If we were called to copy over info for a weak sym, that's all. */
3382 if (eind->elf.root.type != bfd_link_hash_indirect)
3383 return;
3384
3385 /* Copy over got entries that we may have already seen to the
3386 symbol which just became indirect. */
3387 if (eind->elf.got.glist != NULL)
3388 {
3389 if (edir->elf.got.glist != NULL)
3390 {
3391 struct got_entry **entp;
3392 struct got_entry *ent;
3393
3394 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
3395 {
3396 struct got_entry *dent;
3397
3398 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
3399 if (dent->addend == ent->addend
3400 && dent->owner == ent->owner
3401 && dent->tls_type == ent->tls_type)
3402 {
3403 dent->got.refcount += ent->got.refcount;
3404 *entp = ent->next;
3405 break;
3406 }
3407 if (dent == NULL)
3408 entp = &ent->next;
3409 }
3410 *entp = edir->elf.got.glist;
3411 }
3412
3413 edir->elf.got.glist = eind->elf.got.glist;
3414 eind->elf.got.glist = NULL;
3415 }
3416
3417 /* And plt entries. */
3418 if (eind->elf.plt.plist != NULL)
3419 {
3420 if (edir->elf.plt.plist != NULL)
3421 {
3422 struct plt_entry **entp;
3423 struct plt_entry *ent;
3424
3425 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3426 {
3427 struct plt_entry *dent;
3428
3429 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3430 if (dent->addend == ent->addend)
3431 {
3432 dent->plt.refcount += ent->plt.refcount;
3433 *entp = ent->next;
3434 break;
3435 }
3436 if (dent == NULL)
3437 entp = &ent->next;
3438 }
3439 *entp = edir->elf.plt.plist;
3440 }
3441
3442 edir->elf.plt.plist = eind->elf.plt.plist;
3443 eind->elf.plt.plist = NULL;
3444 }
3445
3446 if (edir->elf.dynindx == -1)
3447 {
3448 edir->elf.dynindx = eind->elf.dynindx;
3449 edir->elf.dynstr_index = eind->elf.dynstr_index;
3450 eind->elf.dynindx = -1;
3451 eind->elf.dynstr_index = 0;
3452 }
3453 else
3454 BFD_ASSERT (eind->elf.dynindx == -1);
3455 }
3456
3457 /* Set a flag, used by ppc64_elf_gc_mark_hook, on the entry symbol and
3458 symbols undefined on the command-line. */
3459
3460 bfd_boolean
ppc64_elf_mark_entry_syms(struct bfd_link_info * info)3461 ppc64_elf_mark_entry_syms (struct bfd_link_info *info)
3462 {
3463 struct ppc_link_hash_table *htab;
3464 struct bfd_sym_chain *sym;
3465
3466 htab = ppc_hash_table (info);
3467 for (sym = info->gc_sym_list; sym; sym = sym->next)
3468 {
3469 struct elf_link_hash_entry *h;
3470
3471 h = elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
3472 if (h != NULL)
3473 ((struct ppc_link_hash_entry *) h)->is_entry = 1;
3474 }
3475 return TRUE;
3476 }
3477
3478 /* Hack symbols defined in .opd sections to be function type. */
3479
3480 static bfd_boolean
ppc64_elf_add_symbol_hook(bfd * ibfd ATTRIBUTE_UNUSED,struct bfd_link_info * info ATTRIBUTE_UNUSED,Elf_Internal_Sym * isym,const char ** name ATTRIBUTE_UNUSED,flagword * flags ATTRIBUTE_UNUSED,asection ** sec,bfd_vma * value ATTRIBUTE_UNUSED)3481 ppc64_elf_add_symbol_hook (bfd *ibfd ATTRIBUTE_UNUSED,
3482 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3483 Elf_Internal_Sym *isym,
3484 const char **name ATTRIBUTE_UNUSED,
3485 flagword *flags ATTRIBUTE_UNUSED,
3486 asection **sec,
3487 bfd_vma *value ATTRIBUTE_UNUSED)
3488 {
3489 if (strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
3490 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
3491 return TRUE;
3492 }
3493
3494 static bfd_boolean
update_local_sym_info(bfd * abfd,Elf_Internal_Shdr * symtab_hdr,unsigned long r_symndx,bfd_vma r_addend,int tls_type)3495 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
3496 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
3497 {
3498 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
3499 char *local_got_tls_masks;
3500
3501 if (local_got_ents == NULL)
3502 {
3503 bfd_size_type size = symtab_hdr->sh_info;
3504
3505 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
3506 local_got_ents = bfd_zalloc (abfd, size);
3507 if (local_got_ents == NULL)
3508 return FALSE;
3509 elf_local_got_ents (abfd) = local_got_ents;
3510 }
3511
3512 if ((tls_type & TLS_EXPLICIT) == 0)
3513 {
3514 struct got_entry *ent;
3515
3516 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
3517 if (ent->addend == r_addend
3518 && ent->owner == abfd
3519 && ent->tls_type == tls_type)
3520 break;
3521 if (ent == NULL)
3522 {
3523 bfd_size_type amt = sizeof (*ent);
3524 ent = bfd_alloc (abfd, amt);
3525 if (ent == NULL)
3526 return FALSE;
3527 ent->next = local_got_ents[r_symndx];
3528 ent->addend = r_addend;
3529 ent->owner = abfd;
3530 ent->tls_type = tls_type;
3531 ent->got.refcount = 0;
3532 local_got_ents[r_symndx] = ent;
3533 }
3534 ent->got.refcount += 1;
3535 }
3536
3537 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
3538 local_got_tls_masks[r_symndx] |= tls_type;
3539 return TRUE;
3540 }
3541
3542 static bfd_boolean
update_plt_info(bfd * abfd,struct ppc_link_hash_entry * eh,bfd_vma addend)3543 update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
3544 {
3545 struct plt_entry *ent;
3546
3547 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
3548 if (ent->addend == addend)
3549 break;
3550 if (ent == NULL)
3551 {
3552 bfd_size_type amt = sizeof (*ent);
3553 ent = bfd_alloc (abfd, amt);
3554 if (ent == NULL)
3555 return FALSE;
3556 ent->next = eh->elf.plt.plist;
3557 ent->addend = addend;
3558 ent->plt.refcount = 0;
3559 eh->elf.plt.plist = ent;
3560 }
3561 ent->plt.refcount += 1;
3562 eh->elf.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
3563 eh->is_func = 1;
3564 return TRUE;
3565 }
3566
3567 /* Find the function descriptor hash entry from the given function code
3568 hash entry FH. Link the entries via their OH fields. */
3569 static struct ppc_link_hash_entry *
get_fdh(struct ppc_link_hash_entry * fh,struct ppc_link_hash_table * htab)3570 get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
3571 {
3572 struct ppc_link_hash_entry *fdh = (struct ppc_link_hash_entry *) fh->oh;
3573
3574 if (fdh == NULL)
3575 {
3576 const char *fd_name = fh->elf.root.root.string + 1;
3577
3578 fdh = (struct ppc_link_hash_entry *)
3579 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
3580 if (fdh != NULL)
3581 {
3582 fdh->is_func_descriptor = 1;
3583 fdh->oh = &fh->elf;
3584 fh->is_func = 1;
3585 fh->oh = &fdh->elf;
3586 }
3587 }
3588
3589 return fdh;
3590 }
3591
3592 /* Look through the relocs for a section during the first phase, and
3593 calculate needed space in the global offset table, procedure
3594 linkage table, and dynamic reloc sections. */
3595
3596 static bfd_boolean
ppc64_elf_check_relocs(bfd * abfd,struct bfd_link_info * info,asection * sec,const Elf_Internal_Rela * relocs)3597 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
3598 asection *sec, const Elf_Internal_Rela *relocs)
3599 {
3600 struct ppc_link_hash_table *htab;
3601 Elf_Internal_Shdr *symtab_hdr;
3602 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
3603 const Elf_Internal_Rela *rel;
3604 const Elf_Internal_Rela *rel_end;
3605 asection *sreloc;
3606 asection **opd_sym_map;
3607
3608 if (info->relocatable)
3609 return TRUE;
3610
3611 /* Don't do anything special with non-loaded, non-alloced sections.
3612 In particular, any relocs in such sections should not affect GOT
3613 and PLT reference counting (ie. we don't allow them to create GOT
3614 or PLT entries), there's no possibility or desire to optimize TLS
3615 relocs, and there's not much point in propagating relocs to shared
3616 libs that the dynamic linker won't relocate. */
3617 if ((sec->flags & SEC_ALLOC) == 0)
3618 return TRUE;
3619
3620 htab = ppc_hash_table (info);
3621 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3622
3623 sym_hashes = elf_sym_hashes (abfd);
3624 sym_hashes_end = (sym_hashes
3625 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
3626 - symtab_hdr->sh_info);
3627
3628 sreloc = NULL;
3629 opd_sym_map = NULL;
3630 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
3631 {
3632 /* Garbage collection needs some extra help with .opd sections.
3633 We don't want to necessarily keep everything referenced by
3634 relocs in .opd, as that would keep all functions. Instead,
3635 if we reference an .opd symbol (a function descriptor), we
3636 want to keep the function code symbol's section. This is
3637 easy for global symbols, but for local syms we need to keep
3638 information about the associated function section. Later, if
3639 edit_opd deletes entries, we'll use this array to adjust
3640 local syms in .opd. */
3641 union opd_info {
3642 asection *func_section;
3643 long entry_adjust;
3644 };
3645 bfd_size_type amt;
3646
3647 amt = sec->_raw_size * sizeof (union opd_info) / 24;
3648 opd_sym_map = bfd_zalloc (abfd, amt);
3649 if (opd_sym_map == NULL)
3650 return FALSE;
3651 ppc64_elf_section_data (sec)->opd.func_sec = opd_sym_map;
3652 }
3653
3654 if (htab->sfpr == NULL
3655 && !create_linkage_sections (htab->elf.dynobj, info))
3656 return FALSE;
3657
3658 rel_end = relocs + sec->reloc_count;
3659 for (rel = relocs; rel < rel_end; rel++)
3660 {
3661 unsigned long r_symndx;
3662 struct elf_link_hash_entry *h;
3663 enum elf_ppc64_reloc_type r_type;
3664 int tls_type = 0;
3665
3666 r_symndx = ELF64_R_SYM (rel->r_info);
3667 if (r_symndx < symtab_hdr->sh_info)
3668 h = NULL;
3669 else
3670 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3671
3672 r_type = ELF64_R_TYPE (rel->r_info);
3673 switch (r_type)
3674 {
3675 case R_PPC64_GOT_TLSLD16:
3676 case R_PPC64_GOT_TLSLD16_LO:
3677 case R_PPC64_GOT_TLSLD16_HI:
3678 case R_PPC64_GOT_TLSLD16_HA:
3679 ppc64_tlsld_got (abfd)->refcount += 1;
3680 tls_type = TLS_TLS | TLS_LD;
3681 goto dogottls;
3682
3683 case R_PPC64_GOT_TLSGD16:
3684 case R_PPC64_GOT_TLSGD16_LO:
3685 case R_PPC64_GOT_TLSGD16_HI:
3686 case R_PPC64_GOT_TLSGD16_HA:
3687 tls_type = TLS_TLS | TLS_GD;
3688 goto dogottls;
3689
3690 case R_PPC64_GOT_TPREL16_DS:
3691 case R_PPC64_GOT_TPREL16_LO_DS:
3692 case R_PPC64_GOT_TPREL16_HI:
3693 case R_PPC64_GOT_TPREL16_HA:
3694 if (info->shared)
3695 info->flags |= DF_STATIC_TLS;
3696 tls_type = TLS_TLS | TLS_TPREL;
3697 goto dogottls;
3698
3699 case R_PPC64_GOT_DTPREL16_DS:
3700 case R_PPC64_GOT_DTPREL16_LO_DS:
3701 case R_PPC64_GOT_DTPREL16_HI:
3702 case R_PPC64_GOT_DTPREL16_HA:
3703 tls_type = TLS_TLS | TLS_DTPREL;
3704 dogottls:
3705 sec->has_tls_reloc = 1;
3706 /* Fall thru */
3707
3708 case R_PPC64_GOT16:
3709 case R_PPC64_GOT16_DS:
3710 case R_PPC64_GOT16_HA:
3711 case R_PPC64_GOT16_HI:
3712 case R_PPC64_GOT16_LO:
3713 case R_PPC64_GOT16_LO_DS:
3714 /* This symbol requires a global offset table entry. */
3715 sec->has_gp_reloc = 1;
3716 if (ppc64_elf_tdata (abfd)->got == NULL
3717 && !create_got_section (abfd, info))
3718 return FALSE;
3719
3720 if (h != NULL)
3721 {
3722 struct ppc_link_hash_entry *eh;
3723 struct got_entry *ent;
3724
3725 eh = (struct ppc_link_hash_entry *) h;
3726 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
3727 if (ent->addend == rel->r_addend
3728 && ent->owner == abfd
3729 && ent->tls_type == tls_type)
3730 break;
3731 if (ent == NULL)
3732 {
3733 bfd_size_type amt = sizeof (*ent);
3734 ent = bfd_alloc (abfd, amt);
3735 if (ent == NULL)
3736 return FALSE;
3737 ent->next = eh->elf.got.glist;
3738 ent->addend = rel->r_addend;
3739 ent->owner = abfd;
3740 ent->tls_type = tls_type;
3741 ent->got.refcount = 0;
3742 eh->elf.got.glist = ent;
3743 }
3744 ent->got.refcount += 1;
3745 eh->tls_mask |= tls_type;
3746 }
3747 else
3748 /* This is a global offset table entry for a local symbol. */
3749 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
3750 rel->r_addend, tls_type))
3751 return FALSE;
3752 break;
3753
3754 case R_PPC64_PLT16_HA:
3755 case R_PPC64_PLT16_HI:
3756 case R_PPC64_PLT16_LO:
3757 case R_PPC64_PLT32:
3758 case R_PPC64_PLT64:
3759 /* This symbol requires a procedure linkage table entry. We
3760 actually build the entry in adjust_dynamic_symbol,
3761 because this might be a case of linking PIC code without
3762 linking in any dynamic objects, in which case we don't
3763 need to generate a procedure linkage table after all. */
3764 if (h == NULL)
3765 {
3766 /* It does not make sense to have a procedure linkage
3767 table entry for a local symbol. */
3768 bfd_set_error (bfd_error_bad_value);
3769 return FALSE;
3770 }
3771 else
3772 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
3773 rel->r_addend))
3774 return FALSE;
3775 break;
3776
3777 /* The following relocations don't need to propagate the
3778 relocation if linking a shared object since they are
3779 section relative. */
3780 case R_PPC64_SECTOFF:
3781 case R_PPC64_SECTOFF_LO:
3782 case R_PPC64_SECTOFF_HI:
3783 case R_PPC64_SECTOFF_HA:
3784 case R_PPC64_SECTOFF_DS:
3785 case R_PPC64_SECTOFF_LO_DS:
3786 case R_PPC64_DTPREL16:
3787 case R_PPC64_DTPREL16_LO:
3788 case R_PPC64_DTPREL16_HI:
3789 case R_PPC64_DTPREL16_HA:
3790 case R_PPC64_DTPREL16_DS:
3791 case R_PPC64_DTPREL16_LO_DS:
3792 case R_PPC64_DTPREL16_HIGHER:
3793 case R_PPC64_DTPREL16_HIGHERA:
3794 case R_PPC64_DTPREL16_HIGHEST:
3795 case R_PPC64_DTPREL16_HIGHESTA:
3796 break;
3797
3798 /* Nor do these. */
3799 case R_PPC64_TOC16:
3800 case R_PPC64_TOC16_LO:
3801 case R_PPC64_TOC16_HI:
3802 case R_PPC64_TOC16_HA:
3803 case R_PPC64_TOC16_DS:
3804 case R_PPC64_TOC16_LO_DS:
3805 sec->has_gp_reloc = 1;
3806 break;
3807
3808 /* This relocation describes the C++ object vtable hierarchy.
3809 Reconstruct it for later use during GC. */
3810 case R_PPC64_GNU_VTINHERIT:
3811 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3812 return FALSE;
3813 break;
3814
3815 /* This relocation describes which C++ vtable entries are actually
3816 used. Record for later use during GC. */
3817 case R_PPC64_GNU_VTENTRY:
3818 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3819 return FALSE;
3820 break;
3821
3822 case R_PPC64_REL14:
3823 case R_PPC64_REL14_BRTAKEN:
3824 case R_PPC64_REL14_BRNTAKEN:
3825 htab->has_14bit_branch = 1;
3826 /* Fall through. */
3827
3828 case R_PPC64_REL24:
3829 if (h != NULL
3830 && h->root.root.string[0] == '.'
3831 && h->root.root.string[1] != 0)
3832 {
3833 /* We may need a .plt entry if the function this reloc
3834 refers to is in a shared lib. */
3835 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
3836 rel->r_addend))
3837 return FALSE;
3838 if (h == htab->tls_get_addr)
3839 sec->has_tls_reloc = 1;
3840 else if ((strncmp (h->root.root.string, ".__tls_get_addr", 15)
3841 == 0)
3842 && (h->root.root.string[15] == 0
3843 || h->root.root.string[15] == '@'))
3844 {
3845 htab->tls_get_addr = h;
3846 sec->has_tls_reloc = 1;
3847 }
3848 }
3849 break;
3850
3851 case R_PPC64_TPREL64:
3852 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
3853 if (info->shared)
3854 info->flags |= DF_STATIC_TLS;
3855 goto dotlstoc;
3856
3857 case R_PPC64_DTPMOD64:
3858 if (rel + 1 < rel_end
3859 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
3860 && rel[1].r_offset == rel->r_offset + 8)
3861 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
3862 else
3863 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
3864 goto dotlstoc;
3865
3866 case R_PPC64_DTPREL64:
3867 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
3868 if (rel != relocs
3869 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
3870 && rel[-1].r_offset == rel->r_offset - 8)
3871 /* This is the second reloc of a dtpmod, dtprel pair.
3872 Don't mark with TLS_DTPREL. */
3873 goto dodyn;
3874
3875 dotlstoc:
3876 sec->has_tls_reloc = 1;
3877 if (h != NULL)
3878 {
3879 struct ppc_link_hash_entry *eh;
3880 eh = (struct ppc_link_hash_entry *) h;
3881 eh->tls_mask |= tls_type;
3882 }
3883 else
3884 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
3885 rel->r_addend, tls_type))
3886 return FALSE;
3887
3888 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
3889 {
3890 /* One extra to simplify get_tls_mask. */
3891 bfd_size_type amt = sec->_raw_size * sizeof (unsigned) / 8 + 1;
3892 ppc64_elf_section_data (sec)->t_symndx = bfd_zalloc (abfd, amt);
3893 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
3894 return FALSE;
3895 }
3896 BFD_ASSERT (rel->r_offset % 8 == 0);
3897 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8] = r_symndx;
3898
3899 /* Mark the second slot of a GD or LD entry.
3900 -1 to indicate GD and -2 to indicate LD. */
3901 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
3902 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -1;
3903 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
3904 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -2;
3905 goto dodyn;
3906
3907 case R_PPC64_TPREL16:
3908 case R_PPC64_TPREL16_LO:
3909 case R_PPC64_TPREL16_HI:
3910 case R_PPC64_TPREL16_HA:
3911 case R_PPC64_TPREL16_DS:
3912 case R_PPC64_TPREL16_LO_DS:
3913 case R_PPC64_TPREL16_HIGHER:
3914 case R_PPC64_TPREL16_HIGHERA:
3915 case R_PPC64_TPREL16_HIGHEST:
3916 case R_PPC64_TPREL16_HIGHESTA:
3917 if (info->shared)
3918 {
3919 info->flags |= DF_STATIC_TLS;
3920 goto dodyn;
3921 }
3922 break;
3923
3924 case R_PPC64_ADDR64:
3925 if (opd_sym_map != NULL
3926 && h != NULL
3927 && h->root.root.string[0] == '.'
3928 && h->root.root.string[1] != 0)
3929 get_fdh ((struct ppc_link_hash_entry *) h, htab);
3930
3931 if (opd_sym_map != NULL
3932 && h == NULL
3933 && rel + 1 < rel_end
3934 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
3935 {
3936 asection *s;
3937
3938 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
3939 r_symndx);
3940 if (s == NULL)
3941 return FALSE;
3942 else if (s != sec)
3943 opd_sym_map[rel->r_offset / 24] = s;
3944 }
3945 /* Fall through. */
3946
3947 case R_PPC64_REL30:
3948 case R_PPC64_REL32:
3949 case R_PPC64_REL64:
3950 case R_PPC64_ADDR14:
3951 case R_PPC64_ADDR14_BRNTAKEN:
3952 case R_PPC64_ADDR14_BRTAKEN:
3953 case R_PPC64_ADDR16:
3954 case R_PPC64_ADDR16_DS:
3955 case R_PPC64_ADDR16_HA:
3956 case R_PPC64_ADDR16_HI:
3957 case R_PPC64_ADDR16_HIGHER:
3958 case R_PPC64_ADDR16_HIGHERA:
3959 case R_PPC64_ADDR16_HIGHEST:
3960 case R_PPC64_ADDR16_HIGHESTA:
3961 case R_PPC64_ADDR16_LO:
3962 case R_PPC64_ADDR16_LO_DS:
3963 case R_PPC64_ADDR24:
3964 case R_PPC64_ADDR32:
3965 case R_PPC64_UADDR16:
3966 case R_PPC64_UADDR32:
3967 case R_PPC64_UADDR64:
3968 case R_PPC64_TOC:
3969 if (h != NULL && !info->shared)
3970 /* We may need a copy reloc. */
3971 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
3972
3973 /* Don't propagate .opd relocs. */
3974 if (NO_OPD_RELOCS && opd_sym_map != NULL)
3975 break;
3976
3977 /* If we are creating a shared library, and this is a reloc
3978 against a global symbol, or a non PC relative reloc
3979 against a local symbol, then we need to copy the reloc
3980 into the shared library. However, if we are linking with
3981 -Bsymbolic, we do not need to copy a reloc against a
3982 global symbol which is defined in an object we are
3983 including in the link (i.e., DEF_REGULAR is set). At
3984 this point we have not seen all the input files, so it is
3985 possible that DEF_REGULAR is not set now but will be set
3986 later (it is never cleared). In case of a weak definition,
3987 DEF_REGULAR may be cleared later by a strong definition in
3988 a shared library. We account for that possibility below by
3989 storing information in the dyn_relocs field of the hash
3990 table entry. A similar situation occurs when creating
3991 shared libraries and symbol visibility changes render the
3992 symbol local.
3993
3994 If on the other hand, we are creating an executable, we
3995 may need to keep relocations for symbols satisfied by a
3996 dynamic library if we manage to avoid copy relocs for the
3997 symbol. */
3998 dodyn:
3999 if ((info->shared
4000 && (MUST_BE_DYN_RELOC (r_type)
4001 || (h != NULL
4002 && (! info->symbolic
4003 || h->root.type == bfd_link_hash_defweak
4004 || (h->elf_link_hash_flags
4005 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
4006 || (ELIMINATE_COPY_RELOCS
4007 && !info->shared
4008 && h != NULL
4009 && (h->root.type == bfd_link_hash_defweak
4010 || (h->elf_link_hash_flags
4011 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
4012 {
4013 struct ppc_dyn_relocs *p;
4014 struct ppc_dyn_relocs **head;
4015
4016 /* We must copy these reloc types into the output file.
4017 Create a reloc section in dynobj and make room for
4018 this reloc. */
4019 if (sreloc == NULL)
4020 {
4021 const char *name;
4022 bfd *dynobj;
4023
4024 name = (bfd_elf_string_from_elf_section
4025 (abfd,
4026 elf_elfheader (abfd)->e_shstrndx,
4027 elf_section_data (sec)->rel_hdr.sh_name));
4028 if (name == NULL)
4029 return FALSE;
4030
4031 if (strncmp (name, ".rela", 5) != 0
4032 || strcmp (bfd_get_section_name (abfd, sec),
4033 name + 5) != 0)
4034 {
4035 (*_bfd_error_handler)
4036 (_("%s: bad relocation section name `%s\'"),
4037 bfd_archive_filename (abfd), name);
4038 bfd_set_error (bfd_error_bad_value);
4039 }
4040
4041 dynobj = htab->elf.dynobj;
4042 sreloc = bfd_get_section_by_name (dynobj, name);
4043 if (sreloc == NULL)
4044 {
4045 flagword flags;
4046
4047 sreloc = bfd_make_section (dynobj, name);
4048 flags = (SEC_HAS_CONTENTS | SEC_READONLY
4049 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4050 if ((sec->flags & SEC_ALLOC) != 0)
4051 flags |= SEC_ALLOC | SEC_LOAD;
4052 if (sreloc == NULL
4053 || ! bfd_set_section_flags (dynobj, sreloc, flags)
4054 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
4055 return FALSE;
4056 }
4057 elf_section_data (sec)->sreloc = sreloc;
4058 }
4059
4060 /* If this is a global symbol, we count the number of
4061 relocations we need for this symbol. */
4062 if (h != NULL)
4063 {
4064 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
4065 }
4066 else
4067 {
4068 /* Track dynamic relocs needed for local syms too.
4069 We really need local syms available to do this
4070 easily. Oh well. */
4071
4072 asection *s;
4073 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4074 sec, r_symndx);
4075 if (s == NULL)
4076 return FALSE;
4077
4078 head = ((struct ppc_dyn_relocs **)
4079 &elf_section_data (s)->local_dynrel);
4080 }
4081
4082 p = *head;
4083 if (p == NULL || p->sec != sec)
4084 {
4085 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4086 if (p == NULL)
4087 return FALSE;
4088 p->next = *head;
4089 *head = p;
4090 p->sec = sec;
4091 p->count = 0;
4092 p->pc_count = 0;
4093 }
4094
4095 p->count += 1;
4096 if (!MUST_BE_DYN_RELOC (r_type))
4097 p->pc_count += 1;
4098 }
4099 break;
4100
4101 default:
4102 break;
4103 }
4104 }
4105
4106 return TRUE;
4107 }
4108
4109 /* Return the section that should be marked against GC for a given
4110 relocation. */
4111
4112 static asection *
ppc64_elf_gc_mark_hook(asection * sec,struct bfd_link_info * info ATTRIBUTE_UNUSED,Elf_Internal_Rela * rel,struct elf_link_hash_entry * h,Elf_Internal_Sym * sym)4113 ppc64_elf_gc_mark_hook (asection *sec,
4114 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4115 Elf_Internal_Rela *rel,
4116 struct elf_link_hash_entry *h,
4117 Elf_Internal_Sym *sym)
4118 {
4119 asection *rsec = NULL;
4120
4121 if (h != NULL)
4122 {
4123 enum elf_ppc64_reloc_type r_type;
4124 struct ppc_link_hash_entry *fdh;
4125
4126 r_type = ELF64_R_TYPE (rel->r_info);
4127 switch (r_type)
4128 {
4129 case R_PPC64_GNU_VTINHERIT:
4130 case R_PPC64_GNU_VTENTRY:
4131 break;
4132
4133 default:
4134 switch (h->root.type)
4135 {
4136 case bfd_link_hash_defined:
4137 case bfd_link_hash_defweak:
4138 fdh = (struct ppc_link_hash_entry *) h;
4139
4140 /* Function descriptor syms cause the associated
4141 function code sym section to be marked. */
4142 if (fdh->is_func_descriptor)
4143 rsec = fdh->oh->root.u.def.section;
4144
4145 /* Function entry syms return NULL if they are in .opd
4146 and are not ._start (or others undefined on the ld
4147 command line). Thus we avoid marking all function
4148 sections, as all functions are referenced in .opd. */
4149 else if ((fdh->oh != NULL
4150 && ((struct ppc_link_hash_entry *) fdh->oh)->is_entry)
4151 || ppc64_elf_section_data (sec)->opd.func_sec == NULL)
4152 rsec = h->root.u.def.section;
4153 break;
4154
4155 case bfd_link_hash_common:
4156 rsec = h->root.u.c.p->section;
4157 break;
4158
4159 default:
4160 break;
4161 }
4162 }
4163 }
4164 else
4165 {
4166 asection **opd_sym_section;
4167
4168 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
4169 opd_sym_section = ppc64_elf_section_data (rsec)->opd.func_sec;
4170 if (opd_sym_section != NULL)
4171 rsec = opd_sym_section[sym->st_value / 24];
4172 else if (ppc64_elf_section_data (sec)->opd.func_sec != NULL)
4173 rsec = NULL;
4174 }
4175
4176 return rsec;
4177 }
4178
4179 /* Update the .got, .plt. and dynamic reloc reference counts for the
4180 section being removed. */
4181
4182 static bfd_boolean
ppc64_elf_gc_sweep_hook(bfd * abfd,struct bfd_link_info * info,asection * sec,const Elf_Internal_Rela * relocs)4183 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
4184 asection *sec, const Elf_Internal_Rela *relocs)
4185 {
4186 struct ppc_link_hash_table *htab;
4187 Elf_Internal_Shdr *symtab_hdr;
4188 struct elf_link_hash_entry **sym_hashes;
4189 struct got_entry **local_got_ents;
4190 const Elf_Internal_Rela *rel, *relend;
4191
4192 if ((sec->flags & SEC_ALLOC) == 0)
4193 return TRUE;
4194
4195 elf_section_data (sec)->local_dynrel = NULL;
4196
4197 htab = ppc_hash_table (info);
4198 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4199 sym_hashes = elf_sym_hashes (abfd);
4200 local_got_ents = elf_local_got_ents (abfd);
4201
4202 relend = relocs + sec->reloc_count;
4203 for (rel = relocs; rel < relend; rel++)
4204 {
4205 unsigned long r_symndx;
4206 enum elf_ppc64_reloc_type r_type;
4207 struct elf_link_hash_entry *h = NULL;
4208 char tls_type = 0;
4209
4210 r_symndx = ELF64_R_SYM (rel->r_info);
4211 r_type = ELF64_R_TYPE (rel->r_info);
4212 if (r_symndx >= symtab_hdr->sh_info)
4213 {
4214 struct ppc_link_hash_entry *eh;
4215 struct ppc_dyn_relocs **pp;
4216 struct ppc_dyn_relocs *p;
4217
4218 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4219 eh = (struct ppc_link_hash_entry *) h;
4220
4221 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4222 if (p->sec == sec)
4223 {
4224 /* Everything must go for SEC. */
4225 *pp = p->next;
4226 break;
4227 }
4228 }
4229
4230 switch (r_type)
4231 {
4232 case R_PPC64_GOT_TLSLD16:
4233 case R_PPC64_GOT_TLSLD16_LO:
4234 case R_PPC64_GOT_TLSLD16_HI:
4235 case R_PPC64_GOT_TLSLD16_HA:
4236 ppc64_tlsld_got (abfd)->refcount -= 1;
4237 tls_type = TLS_TLS | TLS_LD;
4238 goto dogot;
4239
4240 case R_PPC64_GOT_TLSGD16:
4241 case R_PPC64_GOT_TLSGD16_LO:
4242 case R_PPC64_GOT_TLSGD16_HI:
4243 case R_PPC64_GOT_TLSGD16_HA:
4244 tls_type = TLS_TLS | TLS_GD;
4245 goto dogot;
4246
4247 case R_PPC64_GOT_TPREL16_DS:
4248 case R_PPC64_GOT_TPREL16_LO_DS:
4249 case R_PPC64_GOT_TPREL16_HI:
4250 case R_PPC64_GOT_TPREL16_HA:
4251 tls_type = TLS_TLS | TLS_TPREL;
4252 goto dogot;
4253
4254 case R_PPC64_GOT_DTPREL16_DS:
4255 case R_PPC64_GOT_DTPREL16_LO_DS:
4256 case R_PPC64_GOT_DTPREL16_HI:
4257 case R_PPC64_GOT_DTPREL16_HA:
4258 tls_type = TLS_TLS | TLS_DTPREL;
4259 goto dogot;
4260
4261 case R_PPC64_GOT16:
4262 case R_PPC64_GOT16_DS:
4263 case R_PPC64_GOT16_HA:
4264 case R_PPC64_GOT16_HI:
4265 case R_PPC64_GOT16_LO:
4266 case R_PPC64_GOT16_LO_DS:
4267 dogot:
4268 {
4269 struct got_entry *ent;
4270
4271 if (h != NULL)
4272 ent = h->got.glist;
4273 else
4274 ent = local_got_ents[r_symndx];
4275
4276 for (; ent != NULL; ent = ent->next)
4277 if (ent->addend == rel->r_addend
4278 && ent->owner == abfd
4279 && ent->tls_type == tls_type)
4280 break;
4281 if (ent == NULL)
4282 abort ();
4283 if (ent->got.refcount > 0)
4284 ent->got.refcount -= 1;
4285 }
4286 break;
4287
4288 case R_PPC64_PLT16_HA:
4289 case R_PPC64_PLT16_HI:
4290 case R_PPC64_PLT16_LO:
4291 case R_PPC64_PLT32:
4292 case R_PPC64_PLT64:
4293 case R_PPC64_REL14:
4294 case R_PPC64_REL14_BRNTAKEN:
4295 case R_PPC64_REL14_BRTAKEN:
4296 case R_PPC64_REL24:
4297 if (h != NULL)
4298 {
4299 struct plt_entry *ent;
4300
4301 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4302 if (ent->addend == rel->r_addend)
4303 break;
4304 if (ent == NULL)
4305 abort ();
4306 if (ent->plt.refcount > 0)
4307 ent->plt.refcount -= 1;
4308 }
4309 break;
4310
4311 default:
4312 break;
4313 }
4314 }
4315 return TRUE;
4316 }
4317
4318 /* Called via elf_link_hash_traverse to transfer dynamic linking
4319 information on function code symbol entries to their corresponding
4320 function descriptor symbol entries. */
4321 static bfd_boolean
func_desc_adjust(struct elf_link_hash_entry * h,void * inf)4322 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
4323 {
4324 struct bfd_link_info *info;
4325 struct ppc_link_hash_table *htab;
4326 struct plt_entry *ent;
4327 struct ppc_link_hash_entry *fh;
4328 struct ppc_link_hash_entry *fdh;
4329 bfd_boolean force_local;
4330
4331 fh = (struct ppc_link_hash_entry *) h;
4332 if (fh->elf.root.type == bfd_link_hash_indirect)
4333 return TRUE;
4334
4335 if (fh->elf.root.type == bfd_link_hash_warning)
4336 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
4337
4338 info = inf;
4339 htab = ppc_hash_table (info);
4340
4341 /* If this is a function code symbol, transfer dynamic linking
4342 information to the function descriptor symbol. */
4343 if (!fh->is_func)
4344 return TRUE;
4345
4346 if (fh->elf.root.type == bfd_link_hash_undefweak
4347 && (fh->elf.elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR))
4348 htab->have_undefweak = TRUE;
4349
4350 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
4351 if (ent->plt.refcount > 0)
4352 break;
4353 if (ent == NULL
4354 || fh->elf.root.root.string[0] != '.'
4355 || fh->elf.root.root.string[1] == '\0')
4356 return TRUE;
4357
4358 /* Find the corresponding function descriptor symbol. Create it
4359 as undefined if necessary. */
4360
4361 fdh = get_fdh (fh, htab);
4362 if (fdh != NULL)
4363 while (fdh->elf.root.type == bfd_link_hash_indirect
4364 || fdh->elf.root.type == bfd_link_hash_warning)
4365 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
4366
4367 if (fdh == NULL
4368 && info->shared
4369 && (fh->elf.root.type == bfd_link_hash_undefined
4370 || fh->elf.root.type == bfd_link_hash_undefweak))
4371 {
4372 bfd *abfd;
4373 asymbol *newsym;
4374 struct bfd_link_hash_entry *bh;
4375
4376 abfd = fh->elf.root.u.undef.abfd;
4377 newsym = bfd_make_empty_symbol (abfd);
4378 newsym->name = fh->elf.root.root.string + 1;
4379 newsym->section = bfd_und_section_ptr;
4380 newsym->value = 0;
4381 newsym->flags = BSF_OBJECT;
4382 if (fh->elf.root.type == bfd_link_hash_undefweak)
4383 newsym->flags |= BSF_WEAK;
4384
4385 bh = &fdh->elf.root;
4386 if ( !(_bfd_generic_link_add_one_symbol
4387 (info, abfd, newsym->name, newsym->flags,
4388 newsym->section, newsym->value, NULL, FALSE, FALSE, &bh)))
4389 {
4390 return FALSE;
4391 }
4392 fdh = (struct ppc_link_hash_entry *) bh;
4393 fdh->elf.elf_link_hash_flags &= ~ELF_LINK_NON_ELF;
4394 fdh->elf.size = 24;
4395 fdh->elf.type = STT_OBJECT;
4396 }
4397
4398 if (fdh != NULL
4399 && (fdh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0
4400 && (info->shared
4401 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
4402 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0
4403 || (fdh->elf.root.type == bfd_link_hash_undefweak
4404 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
4405 {
4406 if (fdh->elf.dynindx == -1)
4407 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
4408 return FALSE;
4409 fdh->elf.elf_link_hash_flags
4410 |= (fh->elf.elf_link_hash_flags & (ELF_LINK_HASH_REF_REGULAR
4411 | ELF_LINK_HASH_REF_DYNAMIC
4412 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
4413 | ELF_LINK_NON_GOT_REF));
4414 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
4415 {
4416 fdh->elf.plt.plist = fh->elf.plt.plist;
4417 fdh->elf.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
4418 }
4419 fdh->is_func_descriptor = 1;
4420 fdh->oh = &fh->elf;
4421 fh->oh = &fdh->elf;
4422 }
4423
4424 /* Now that the info is on the function descriptor, clear the
4425 function code sym info. Any function code syms for which we
4426 don't have a definition in a regular file, we force local.
4427 This prevents a shared library from exporting syms that have
4428 been imported from another library. Function code syms that
4429 are really in the library we must leave global to prevent the
4430 linker dragging in a definition from a static library. */
4431 force_local
4432 = (info->shared
4433 && ((fh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
4434 || fdh == NULL
4435 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
4436 || (fdh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0));
4437 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
4438
4439 return TRUE;
4440 }
4441
4442 #define MIN_SAVE_FPR 14
4443 #define MAX_SAVE_FPR 31
4444
4445 /* Called near the start of bfd_elf_size_dynamic_sections. We use
4446 this hook to a) provide some gcc support functions, and b) transfer
4447 dynamic linking information gathered so far on function code symbol
4448 entries, to their corresponding function descriptor symbol entries. */
4449 static bfd_boolean
ppc64_elf_func_desc_adjust(bfd * obfd ATTRIBUTE_UNUSED,struct bfd_link_info * info)4450 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
4451 struct bfd_link_info *info)
4452 {
4453 struct ppc_link_hash_table *htab;
4454 unsigned int lowest_savef = MAX_SAVE_FPR + 2;
4455 unsigned int lowest_restf = MAX_SAVE_FPR + 2;
4456 unsigned int i;
4457 struct elf_link_hash_entry *h;
4458 bfd_byte *p;
4459 char sym[10];
4460
4461 htab = ppc_hash_table (info);
4462
4463 if (htab->sfpr == NULL)
4464 /* We don't have any relocs. */
4465 return TRUE;
4466
4467 /* First provide any missing ._savef* and ._restf* functions. */
4468 memcpy (sym, "._savef14", 10);
4469 for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++)
4470 {
4471 sym[7] = i / 10 + '0';
4472 sym[8] = i % 10 + '0';
4473 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
4474 if (h != NULL
4475 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
4476 {
4477 if (lowest_savef > i)
4478 lowest_savef = i;
4479 h->root.type = bfd_link_hash_defined;
4480 h->root.u.def.section = htab->sfpr;
4481 h->root.u.def.value = (i - lowest_savef) * 4;
4482 h->type = STT_FUNC;
4483 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
4484 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
4485 }
4486 }
4487
4488 memcpy (sym, "._restf14", 10);
4489 for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++)
4490 {
4491 sym[7] = i / 10 + '0';
4492 sym[8] = i % 10 + '0';
4493 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
4494 if (h != NULL
4495 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
4496 {
4497 if (lowest_restf > i)
4498 lowest_restf = i;
4499 h->root.type = bfd_link_hash_defined;
4500 h->root.u.def.section = htab->sfpr;
4501 h->root.u.def.value = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4
4502 + (i - lowest_restf) * 4);
4503 h->type = STT_FUNC;
4504 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
4505 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
4506 }
4507 }
4508
4509 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
4510
4511 htab->sfpr->_raw_size = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4
4512 + (MAX_SAVE_FPR + 2 - lowest_restf) * 4);
4513
4514 if (htab->sfpr->_raw_size == 0)
4515 {
4516 if (!htab->have_undefweak)
4517 {
4518 _bfd_strip_section_from_output (info, htab->sfpr);
4519 return TRUE;
4520 }
4521
4522 htab->sfpr->_raw_size = 4;
4523 }
4524
4525 p = bfd_alloc (htab->elf.dynobj, htab->sfpr->_raw_size);
4526 if (p == NULL)
4527 return FALSE;
4528 htab->sfpr->contents = p;
4529
4530 for (i = lowest_savef; i <= MAX_SAVE_FPR; i++)
4531 {
4532 unsigned int fpr = i << 21;
4533 unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8;
4534 bfd_put_32 (htab->elf.dynobj, STFD_FR0_0R1 + fpr + stackoff, p);
4535 p += 4;
4536 }
4537 if (lowest_savef <= MAX_SAVE_FPR)
4538 {
4539 bfd_put_32 (htab->elf.dynobj, BLR, p);
4540 p += 4;
4541 }
4542
4543 for (i = lowest_restf; i <= MAX_SAVE_FPR; i++)
4544 {
4545 unsigned int fpr = i << 21;
4546 unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8;
4547 bfd_put_32 (htab->elf.dynobj, LFD_FR0_0R1 + fpr + stackoff, p);
4548 p += 4;
4549 }
4550 if (lowest_restf <= MAX_SAVE_FPR
4551 || htab->sfpr->_raw_size == 4)
4552 {
4553 bfd_put_32 (htab->elf.dynobj, BLR, p);
4554 }
4555
4556 return TRUE;
4557 }
4558
4559 /* Adjust a symbol defined by a dynamic object and referenced by a
4560 regular object. The current definition is in some section of the
4561 dynamic object, but we're not including those sections. We have to
4562 change the definition to something the rest of the link can
4563 understand. */
4564
4565 static bfd_boolean
ppc64_elf_adjust_dynamic_symbol(struct bfd_link_info * info,struct elf_link_hash_entry * h)4566 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4567 struct elf_link_hash_entry *h)
4568 {
4569 struct ppc_link_hash_table *htab;
4570 asection *s;
4571 unsigned int power_of_two;
4572
4573 htab = ppc_hash_table (info);
4574
4575 /* Deal with function syms. */
4576 if (h->type == STT_FUNC
4577 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
4578 {
4579 /* Clear procedure linkage table information for any symbol that
4580 won't need a .plt entry. */
4581 struct plt_entry *ent;
4582 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4583 if (ent->plt.refcount > 0)
4584 break;
4585 if (!((struct ppc_link_hash_entry *) h)->is_func_descriptor
4586 || ent == NULL
4587 || SYMBOL_CALLS_LOCAL (info, h)
4588 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4589 && h->root.type == bfd_link_hash_undefweak))
4590 {
4591 h->plt.plist = NULL;
4592 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
4593 }
4594 }
4595 else
4596 h->plt.plist = NULL;
4597
4598 /* If this is a weak symbol, and there is a real definition, the
4599 processor independent code will have arranged for us to see the
4600 real definition first, and we can just use the same value. */
4601 if (h->weakdef != NULL)
4602 {
4603 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
4604 || h->weakdef->root.type == bfd_link_hash_defweak);
4605 h->root.u.def.section = h->weakdef->root.u.def.section;
4606 h->root.u.def.value = h->weakdef->root.u.def.value;
4607 if (ELIMINATE_COPY_RELOCS)
4608 h->elf_link_hash_flags
4609 = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF)
4610 | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF));
4611 return TRUE;
4612 }
4613
4614 /* If we are creating a shared library, we must presume that the
4615 only references to the symbol are via the global offset table.
4616 For such cases we need not do anything here; the relocations will
4617 be handled correctly by relocate_section. */
4618 if (info->shared)
4619 return TRUE;
4620
4621 /* If there are no references to this symbol that do not use the
4622 GOT, we don't need to generate a copy reloc. */
4623 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
4624 return TRUE;
4625
4626 if (ELIMINATE_COPY_RELOCS)
4627 {
4628 struct ppc_link_hash_entry * eh;
4629 struct ppc_dyn_relocs *p;
4630
4631 eh = (struct ppc_link_hash_entry *) h;
4632 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4633 {
4634 s = p->sec->output_section;
4635 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4636 break;
4637 }
4638
4639 /* If we didn't find any dynamic relocs in read-only sections, then
4640 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
4641 if (p == NULL)
4642 {
4643 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
4644 return TRUE;
4645 }
4646 }
4647
4648 if (h->plt.plist != NULL)
4649 {
4650 /* We should never get here, but unfortunately there are versions
4651 of gcc out there that improperly (for this ABI) put initialized
4652 function pointers, vtable refs and suchlike in read-only
4653 sections. Allow them to proceed, but warn that this might
4654 break at runtime. */
4655 (*_bfd_error_handler)
4656 (_("copy reloc against `%s' requires lazy plt linking; "
4657 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
4658 h->root.root.string);
4659 }
4660
4661 /* This is a reference to a symbol defined by a dynamic object which
4662 is not a function. */
4663
4664 /* We must allocate the symbol in our .dynbss section, which will
4665 become part of the .bss section of the executable. There will be
4666 an entry for this symbol in the .dynsym section. The dynamic
4667 object will contain position independent code, so all references
4668 from the dynamic object to this symbol will go through the global
4669 offset table. The dynamic linker will use the .dynsym entry to
4670 determine the address it must put in the global offset table, so
4671 both the dynamic object and the regular object will refer to the
4672 same memory location for the variable. */
4673
4674 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
4675 to copy the initial value out of the dynamic object and into the
4676 runtime process image. We need to remember the offset into the
4677 .rela.bss section we are going to use. */
4678 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4679 {
4680 htab->relbss->_raw_size += sizeof (Elf64_External_Rela);
4681 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
4682 }
4683
4684 /* We need to figure out the alignment required for this symbol. I
4685 have no idea how ELF linkers handle this. */
4686 power_of_two = bfd_log2 (h->size);
4687 if (power_of_two > 4)
4688 power_of_two = 4;
4689
4690 /* Apply the required alignment. */
4691 s = htab->dynbss;
4692 s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two));
4693 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
4694 {
4695 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
4696 return FALSE;
4697 }
4698
4699 /* Define the symbol as being at this point in the section. */
4700 h->root.u.def.section = s;
4701 h->root.u.def.value = s->_raw_size;
4702
4703 /* Increment the section size to make room for the symbol. */
4704 s->_raw_size += h->size;
4705
4706 return TRUE;
4707 }
4708
4709 /* If given a function descriptor symbol, hide both the function code
4710 sym and the descriptor. */
4711 static void
ppc64_elf_hide_symbol(struct bfd_link_info * info,struct elf_link_hash_entry * h,bfd_boolean force_local)4712 ppc64_elf_hide_symbol (struct bfd_link_info *info,
4713 struct elf_link_hash_entry *h,
4714 bfd_boolean force_local)
4715 {
4716 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
4717
4718 if (((struct ppc_link_hash_entry *) h)->is_func_descriptor)
4719 {
4720 struct elf_link_hash_entry *fh = ((struct ppc_link_hash_entry *) h)->oh;
4721
4722 if (fh == NULL)
4723 {
4724 const char *p, *q;
4725 struct ppc_link_hash_table *htab;
4726 char save;
4727
4728 /* We aren't supposed to use alloca in BFD because on
4729 systems which do not have alloca the version in libiberty
4730 calls xmalloc, which might cause the program to crash
4731 when it runs out of memory. This function doesn't have a
4732 return status, so there's no way to gracefully return an
4733 error. So cheat. We know that string[-1] can be safely
4734 dereferenced; It's either a string in an ELF string
4735 table, or allocated in an objalloc structure. */
4736
4737 p = h->root.root.string - 1;
4738 save = *p;
4739 *(char *) p = '.';
4740 htab = ppc_hash_table (info);
4741 fh = elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
4742 *(char *) p = save;
4743
4744 /* Unfortunately, if it so happens that the string we were
4745 looking for was allocated immediately before this string,
4746 then we overwrote the string terminator. That's the only
4747 reason the lookup should fail. */
4748 if (fh == NULL)
4749 {
4750 q = h->root.root.string + strlen (h->root.root.string);
4751 while (q >= h->root.root.string && *q == *p)
4752 --q, --p;
4753 if (q < h->root.root.string && *p == '.')
4754 fh = elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
4755 }
4756 if (fh != NULL)
4757 {
4758 ((struct ppc_link_hash_entry *) h)->oh = fh;
4759 ((struct ppc_link_hash_entry *) fh)->oh = h;
4760 }
4761 }
4762 if (fh != NULL)
4763 _bfd_elf_link_hash_hide_symbol (info, fh, force_local);
4764 }
4765 }
4766
4767 static bfd_boolean
get_sym_h(struct elf_link_hash_entry ** hp,Elf_Internal_Sym ** symp,asection ** symsecp,char ** tls_maskp,Elf_Internal_Sym ** locsymsp,unsigned long r_symndx,bfd * ibfd)4768 get_sym_h (struct elf_link_hash_entry **hp, Elf_Internal_Sym **symp,
4769 asection **symsecp, char **tls_maskp, Elf_Internal_Sym **locsymsp,
4770 unsigned long r_symndx, bfd *ibfd)
4771 {
4772 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4773
4774 if (r_symndx >= symtab_hdr->sh_info)
4775 {
4776 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
4777 struct elf_link_hash_entry *h;
4778
4779 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4780 while (h->root.type == bfd_link_hash_indirect
4781 || h->root.type == bfd_link_hash_warning)
4782 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4783
4784 if (hp != NULL)
4785 *hp = h;
4786
4787 if (symp != NULL)
4788 *symp = NULL;
4789
4790 if (symsecp != NULL)
4791 {
4792 asection *symsec = NULL;
4793 if (h->root.type == bfd_link_hash_defined
4794 || h->root.type == bfd_link_hash_defweak)
4795 symsec = h->root.u.def.section;
4796 *symsecp = symsec;
4797 }
4798
4799 if (tls_maskp != NULL)
4800 {
4801 struct ppc_link_hash_entry *eh;
4802
4803 eh = (struct ppc_link_hash_entry *) h;
4804 *tls_maskp = &eh->tls_mask;
4805 }
4806 }
4807 else
4808 {
4809 Elf_Internal_Sym *sym;
4810 Elf_Internal_Sym *locsyms = *locsymsp;
4811
4812 if (locsyms == NULL)
4813 {
4814 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4815 if (locsyms == NULL)
4816 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4817 symtab_hdr->sh_info,
4818 0, NULL, NULL, NULL);
4819 if (locsyms == NULL)
4820 return FALSE;
4821 *locsymsp = locsyms;
4822 }
4823 sym = locsyms + r_symndx;
4824
4825 if (hp != NULL)
4826 *hp = NULL;
4827
4828 if (symp != NULL)
4829 *symp = sym;
4830
4831 if (symsecp != NULL)
4832 {
4833 asection *symsec = NULL;
4834 if ((sym->st_shndx != SHN_UNDEF
4835 && sym->st_shndx < SHN_LORESERVE)
4836 || sym->st_shndx > SHN_HIRESERVE)
4837 symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
4838 *symsecp = symsec;
4839 }
4840
4841 if (tls_maskp != NULL)
4842 {
4843 struct got_entry **lgot_ents;
4844 char *tls_mask;
4845
4846 tls_mask = NULL;
4847 lgot_ents = elf_local_got_ents (ibfd);
4848 if (lgot_ents != NULL)
4849 {
4850 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
4851 tls_mask = &lgot_masks[r_symndx];
4852 }
4853 *tls_maskp = tls_mask;
4854 }
4855 }
4856 return TRUE;
4857 }
4858
4859 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
4860 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
4861 type suitable for optimization, and 1 otherwise. */
4862
4863 static int
get_tls_mask(char ** tls_maskp,unsigned long * toc_symndx,Elf_Internal_Sym ** locsymsp,const Elf_Internal_Rela * rel,bfd * ibfd)4864 get_tls_mask (char **tls_maskp, unsigned long *toc_symndx,
4865 Elf_Internal_Sym **locsymsp,
4866 const Elf_Internal_Rela *rel, bfd *ibfd)
4867 {
4868 unsigned long r_symndx;
4869 int next_r;
4870 struct elf_link_hash_entry *h;
4871 Elf_Internal_Sym *sym;
4872 asection *sec;
4873 bfd_vma off;
4874
4875 r_symndx = ELF64_R_SYM (rel->r_info);
4876 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
4877 return 0;
4878
4879 if ((*tls_maskp != NULL && **tls_maskp != 0)
4880 || sec == NULL
4881 || ppc64_elf_section_data (sec)->t_symndx == NULL)
4882 return 1;
4883
4884 /* Look inside a TOC section too. */
4885 if (h != NULL)
4886 {
4887 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
4888 off = h->root.u.def.value;
4889 }
4890 else
4891 off = sym->st_value;
4892 off += rel->r_addend;
4893 BFD_ASSERT (off % 8 == 0);
4894 r_symndx = ppc64_elf_section_data (sec)->t_symndx[off / 8];
4895 next_r = ppc64_elf_section_data (sec)->t_symndx[off / 8 + 1];
4896 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
4897 return 0;
4898 if (toc_symndx != NULL)
4899 *toc_symndx = r_symndx;
4900 if ((h == NULL
4901 || ((h->root.type == bfd_link_hash_defined
4902 || h->root.type == bfd_link_hash_defweak)
4903 && !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)))
4904 && (next_r == -1 || next_r == -2))
4905 return 1 - next_r;
4906 return 1;
4907 }
4908
4909 /* Adjust all global syms defined in opd sections. In gcc generated
4910 code these will already have been done, but I suppose we have to
4911 cater for all sorts of hand written assembly. */
4912
4913 static bfd_boolean
adjust_opd_syms(struct elf_link_hash_entry * h,void * inf ATTRIBUTE_UNUSED)4914 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
4915 {
4916 struct ppc_link_hash_entry *eh;
4917 asection *sym_sec;
4918 long *opd_adjust;
4919
4920 if (h->root.type == bfd_link_hash_indirect)
4921 return TRUE;
4922
4923 if (h->root.type == bfd_link_hash_warning)
4924 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4925
4926 if (h->root.type != bfd_link_hash_defined
4927 && h->root.type != bfd_link_hash_defweak)
4928 return TRUE;
4929
4930 eh = (struct ppc_link_hash_entry *) h;
4931 if (eh->adjust_done)
4932 return TRUE;
4933
4934 sym_sec = eh->elf.root.u.def.section;
4935 if (sym_sec != NULL
4936 && elf_section_data (sym_sec) != NULL
4937 && (opd_adjust = ppc64_elf_section_data (sym_sec)->opd.adjust) != NULL)
4938 {
4939 eh->elf.root.u.def.value += opd_adjust[eh->elf.root.u.def.value / 24];
4940 eh->adjust_done = 1;
4941 }
4942 return TRUE;
4943 }
4944
4945 /* Remove unused Official Procedure Descriptor entries. Currently we
4946 only remove those associated with functions in discarded link-once
4947 sections, or weakly defined functions that have been overridden. It
4948 would be possible to remove many more entries for statically linked
4949 applications. */
4950
4951 bfd_boolean
ppc64_elf_edit_opd(bfd * obfd,struct bfd_link_info * info)4952 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info)
4953 {
4954 bfd *ibfd;
4955 bfd_boolean some_edited = FALSE;
4956
4957 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4958 {
4959 asection *sec;
4960 Elf_Internal_Rela *relstart, *rel, *relend;
4961 Elf_Internal_Shdr *symtab_hdr;
4962 Elf_Internal_Sym *local_syms;
4963 struct elf_link_hash_entry **sym_hashes;
4964 bfd_vma offset;
4965 bfd_size_type amt;
4966 long *adjust;
4967 bfd_boolean need_edit;
4968
4969 sec = bfd_get_section_by_name (ibfd, ".opd");
4970 if (sec == NULL)
4971 continue;
4972
4973 amt = sec->_raw_size * sizeof (long) / 24;
4974 adjust = ppc64_elf_section_data (sec)->opd.adjust;
4975 if (adjust == NULL)
4976 {
4977 /* Must be a ld -r link. ie. check_relocs hasn't been
4978 called. */
4979 adjust = bfd_zalloc (obfd, amt);
4980 ppc64_elf_section_data (sec)->opd.adjust = adjust;
4981 }
4982 memset (adjust, 0, amt);
4983
4984 if (sec->output_section == bfd_abs_section_ptr)
4985 continue;
4986
4987 /* Look through the section relocs. */
4988 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
4989 continue;
4990
4991 local_syms = NULL;
4992 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4993 sym_hashes = elf_sym_hashes (ibfd);
4994
4995 /* Read the relocations. */
4996 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4997 info->keep_memory);
4998 if (relstart == NULL)
4999 return FALSE;
5000
5001 /* First run through the relocs to check they are sane, and to
5002 determine whether we need to edit this opd section. */
5003 need_edit = FALSE;
5004 offset = 0;
5005 relend = relstart + sec->reloc_count;
5006 for (rel = relstart; rel < relend; )
5007 {
5008 enum elf_ppc64_reloc_type r_type;
5009 unsigned long r_symndx;
5010 asection *sym_sec;
5011 struct elf_link_hash_entry *h;
5012 Elf_Internal_Sym *sym;
5013
5014 /* .opd contains a regular array of 24 byte entries. We're
5015 only interested in the reloc pointing to a function entry
5016 point. */
5017 if (rel->r_offset != offset
5018 || rel + 1 >= relend
5019 || (rel + 1)->r_offset != offset + 8)
5020 {
5021 /* If someone messes with .opd alignment then after a
5022 "ld -r" we might have padding in the middle of .opd.
5023 Also, there's nothing to prevent someone putting
5024 something silly in .opd with the assembler. No .opd
5025 optimization for them! */
5026 (*_bfd_error_handler)
5027 (_("%s: .opd is not a regular array of opd entries"),
5028 bfd_archive_filename (ibfd));
5029 need_edit = FALSE;
5030 break;
5031 }
5032
5033 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
5034 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
5035 {
5036 (*_bfd_error_handler)
5037 (_("%s: unexpected reloc type %u in .opd section"),
5038 bfd_archive_filename (ibfd), r_type);
5039 need_edit = FALSE;
5040 break;
5041 }
5042
5043 r_symndx = ELF64_R_SYM (rel->r_info);
5044 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
5045 r_symndx, ibfd))
5046 goto error_ret;
5047
5048 if (sym_sec == NULL || sym_sec->owner == NULL)
5049 {
5050 const char *sym_name;
5051 if (h != NULL)
5052 sym_name = h->root.root.string;
5053 else
5054 sym_name = bfd_elf_local_sym_name (ibfd, sym);
5055
5056 (*_bfd_error_handler)
5057 (_("%s: undefined sym `%s' in .opd section"),
5058 bfd_archive_filename (ibfd),
5059 sym_name);
5060 need_edit = FALSE;
5061 break;
5062 }
5063
5064 /* opd entries are always for functions defined in the
5065 current input bfd. If the symbol isn't defined in the
5066 input bfd, then we won't be using the function in this
5067 bfd; It must be defined in a linkonce section in another
5068 bfd, or is weak. It's also possible that we are
5069 discarding the function due to a linker script /DISCARD/,
5070 which we test for via the output_section. */
5071 if (sym_sec->owner != ibfd
5072 || sym_sec->output_section == bfd_abs_section_ptr)
5073 need_edit = TRUE;
5074
5075 offset += 24;
5076 rel += 2;
5077 /* Allow for the possibility of a reloc on the third word. */
5078 if (rel < relend
5079 && rel->r_offset == offset - 8)
5080 rel += 1;
5081 }
5082
5083 if (need_edit)
5084 {
5085 Elf_Internal_Rela *write_rel;
5086 bfd_byte *rptr, *wptr;
5087 bfd_boolean skip;
5088
5089 /* This seems a waste of time as input .opd sections are all
5090 zeros as generated by gcc, but I suppose there's no reason
5091 this will always be so. We might start putting something in
5092 the third word of .opd entries. */
5093 if ((sec->flags & SEC_IN_MEMORY) == 0)
5094 {
5095 bfd_byte *loc = bfd_alloc (ibfd, sec->_raw_size);
5096 if (loc == NULL
5097 || !bfd_get_section_contents (ibfd, sec, loc, 0,
5098 sec->_raw_size))
5099 {
5100 error_ret:
5101 if (local_syms != NULL
5102 && symtab_hdr->contents != (unsigned char *) local_syms)
5103 free (local_syms);
5104 if (elf_section_data (sec)->relocs != relstart)
5105 free (relstart);
5106 return FALSE;
5107 }
5108 sec->contents = loc;
5109 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
5110 }
5111
5112 elf_section_data (sec)->relocs = relstart;
5113
5114 wptr = sec->contents;
5115 rptr = sec->contents;
5116 write_rel = relstart;
5117 skip = FALSE;
5118 offset = 0;
5119 for (rel = relstart; rel < relend; rel++)
5120 {
5121 unsigned long r_symndx;
5122 asection *sym_sec;
5123 struct elf_link_hash_entry *h;
5124 Elf_Internal_Sym *sym;
5125
5126 r_symndx = ELF64_R_SYM (rel->r_info);
5127 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
5128 r_symndx, ibfd))
5129 goto error_ret;
5130
5131 if (rel->r_offset == offset)
5132 {
5133 struct ppc_link_hash_entry *fdh = NULL;
5134 if (h != NULL)
5135 fdh = get_fdh ((struct ppc_link_hash_entry *) h,
5136 ppc_hash_table (info));
5137
5138 skip = (sym_sec->owner != ibfd
5139 || sym_sec->output_section == bfd_abs_section_ptr);
5140 if (skip)
5141 {
5142 if (h != NULL && sym_sec->owner == ibfd)
5143 {
5144 /* Arrange for the function descriptor sym
5145 to be dropped. */
5146 fdh->elf.root.u.def.value = 0;
5147 fdh->elf.root.u.def.section = sym_sec;
5148 }
5149 }
5150 else
5151 {
5152 /* We'll be keeping this opd entry. */
5153
5154 if (h != NULL)
5155 {
5156 /* Redefine the function descriptor symbol to
5157 this location in the opd section. It is
5158 necessary to update the value here rather
5159 than using an array of adjustments as we do
5160 for local symbols, because various places
5161 in the generic ELF code use the value
5162 stored in u.def.value. */
5163 fdh->elf.root.u.def.value = wptr - sec->contents;
5164 fdh->adjust_done = 1;
5165 }
5166
5167 /* Local syms are a bit tricky. We could
5168 tweak them as they can be cached, but
5169 we'd need to look through the local syms
5170 for the function descriptor sym which we
5171 don't have at the moment. So keep an
5172 array of adjustments. */
5173 adjust[rel->r_offset / 24] = wptr - rptr;
5174
5175 if (wptr != rptr)
5176 memcpy (wptr, rptr, 24);
5177 wptr += 24;
5178 }
5179 rptr += 24;
5180 offset += 24;
5181 }
5182
5183 if (skip)
5184 {
5185 BFD_ASSERT (MUST_BE_DYN_RELOC (ELF64_R_TYPE (rel->r_info)));
5186 if (info->shared)
5187 {
5188 /* We won't be needing dynamic relocs here. */
5189 struct ppc_dyn_relocs **pp;
5190 struct ppc_dyn_relocs *p;
5191
5192 if (h != NULL)
5193 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5194 else if (sym_sec != NULL)
5195 pp = ((struct ppc_dyn_relocs **)
5196 &elf_section_data (sym_sec)->local_dynrel);
5197 else
5198 pp = ((struct ppc_dyn_relocs **)
5199 &elf_section_data (sec)->local_dynrel);
5200 while ((p = *pp) != NULL)
5201 {
5202 if (p->sec == sec)
5203 {
5204 p->count -= 1;
5205 if (p->count == 0)
5206 *pp = p->next;
5207 break;
5208 }
5209 pp = &p->next;
5210 }
5211 }
5212 }
5213 else
5214 {
5215 /* We need to adjust any reloc offsets to point to the
5216 new opd entries. While we're at it, we may as well
5217 remove redundant relocs. */
5218 rel->r_offset += wptr - rptr;
5219 if (write_rel != rel)
5220 memcpy (write_rel, rel, sizeof (*rel));
5221 ++write_rel;
5222 }
5223 }
5224
5225 sec->_cooked_size = wptr - sec->contents;
5226 sec->reloc_count = write_rel - relstart;
5227 /* Fudge the size too, as this is used later in
5228 elf_bfd_final_link if we are emitting relocs. */
5229 elf_section_data (sec)->rel_hdr.sh_size
5230 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
5231 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
5232 some_edited = TRUE;
5233 }
5234 else if (elf_section_data (sec)->relocs != relstart)
5235 free (relstart);
5236
5237 if (local_syms != NULL
5238 && symtab_hdr->contents != (unsigned char *) local_syms)
5239 {
5240 if (!info->keep_memory)
5241 free (local_syms);
5242 else
5243 symtab_hdr->contents = (unsigned char *) local_syms;
5244 }
5245 }
5246
5247 if (some_edited)
5248 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
5249
5250 return TRUE;
5251 }
5252
5253 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
5254
5255 asection *
ppc64_elf_tls_setup(bfd * obfd,struct bfd_link_info * info)5256 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5257 {
5258 struct ppc_link_hash_table *htab;
5259
5260 htab = ppc_hash_table (info);
5261 if (htab->tls_get_addr != NULL)
5262 {
5263 struct elf_link_hash_entry *h = htab->tls_get_addr;
5264
5265 while (h->root.type == bfd_link_hash_indirect
5266 || h->root.type == bfd_link_hash_warning)
5267 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5268
5269 htab->tls_get_addr = h;
5270 }
5271
5272 return _bfd_elf_tls_setup (obfd, info);
5273 }
5274
5275 /* Run through all the TLS relocs looking for optimization
5276 opportunities. The linker has been hacked (see ppc64elf.em) to do
5277 a preliminary section layout so that we know the TLS segment
5278 offsets. We can't optimize earlier because some optimizations need
5279 to know the tp offset, and we need to optimize before allocating
5280 dynamic relocations. */
5281
5282 bfd_boolean
ppc64_elf_tls_optimize(bfd * obfd ATTRIBUTE_UNUSED,struct bfd_link_info * info)5283 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
5284 {
5285 bfd *ibfd;
5286 asection *sec;
5287 struct ppc_link_hash_table *htab;
5288
5289 if (info->relocatable || info->shared)
5290 return TRUE;
5291
5292 htab = ppc_hash_table (info);
5293 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5294 {
5295 Elf_Internal_Sym *locsyms = NULL;
5296
5297 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5298 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5299 {
5300 Elf_Internal_Rela *relstart, *rel, *relend;
5301 int expecting_tls_get_addr;
5302
5303 /* Read the relocations. */
5304 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5305 info->keep_memory);
5306 if (relstart == NULL)
5307 return FALSE;
5308
5309 expecting_tls_get_addr = 0;
5310 relend = relstart + sec->reloc_count;
5311 for (rel = relstart; rel < relend; rel++)
5312 {
5313 enum elf_ppc64_reloc_type r_type;
5314 unsigned long r_symndx;
5315 struct elf_link_hash_entry *h;
5316 Elf_Internal_Sym *sym;
5317 asection *sym_sec;
5318 char *tls_mask;
5319 char tls_set, tls_clear, tls_type = 0;
5320 bfd_vma value;
5321 bfd_boolean ok_tprel, is_local;
5322
5323 r_symndx = ELF64_R_SYM (rel->r_info);
5324 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
5325 r_symndx, ibfd))
5326 {
5327 err_free_rel:
5328 if (elf_section_data (sec)->relocs != relstart)
5329 free (relstart);
5330 if (locsyms != NULL
5331 && (elf_tdata (ibfd)->symtab_hdr.contents
5332 != (unsigned char *) locsyms))
5333 free (locsyms);
5334 return FALSE;
5335 }
5336
5337 if (h != NULL)
5338 {
5339 if (h->root.type != bfd_link_hash_defined
5340 && h->root.type != bfd_link_hash_defweak)
5341 continue;
5342 value = h->root.u.def.value;
5343 }
5344 else
5345 {
5346 value = sym->st_value;
5347
5348 if (elf_section_data (sym_sec) != NULL)
5349 {
5350 long *adjust;
5351 adjust = ppc64_elf_section_data (sym_sec)->opd.adjust;
5352 if (adjust != NULL)
5353 value += adjust[value / 24];
5354 }
5355 }
5356
5357 ok_tprel = FALSE;
5358 is_local = FALSE;
5359 if (h == NULL
5360 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
5361 {
5362 is_local = TRUE;
5363 value += sym_sec->output_offset;
5364 value += sym_sec->output_section->vma;
5365 value -= htab->elf.tls_sec->vma;
5366 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
5367 < (bfd_vma) 1 << 32);
5368 }
5369
5370 r_type = ELF64_R_TYPE (rel->r_info);
5371 switch (r_type)
5372 {
5373 case R_PPC64_GOT_TLSLD16:
5374 case R_PPC64_GOT_TLSLD16_LO:
5375 case R_PPC64_GOT_TLSLD16_HI:
5376 case R_PPC64_GOT_TLSLD16_HA:
5377 /* These relocs should never be against a symbol
5378 defined in a shared lib. Leave them alone if
5379 that turns out to be the case. */
5380 ppc64_tlsld_got (ibfd)->refcount -= 1;
5381 if (!is_local)
5382 continue;
5383
5384 /* LD -> LE */
5385 tls_set = 0;
5386 tls_clear = TLS_LD;
5387 tls_type = TLS_TLS | TLS_LD;
5388 expecting_tls_get_addr = 1;
5389 break;
5390
5391 case R_PPC64_GOT_TLSGD16:
5392 case R_PPC64_GOT_TLSGD16_LO:
5393 case R_PPC64_GOT_TLSGD16_HI:
5394 case R_PPC64_GOT_TLSGD16_HA:
5395 if (ok_tprel)
5396 /* GD -> LE */
5397 tls_set = 0;
5398 else
5399 /* GD -> IE */
5400 tls_set = TLS_TLS | TLS_TPRELGD;
5401 tls_clear = TLS_GD;
5402 tls_type = TLS_TLS | TLS_GD;
5403 expecting_tls_get_addr = 1;
5404 break;
5405
5406 case R_PPC64_GOT_TPREL16_DS:
5407 case R_PPC64_GOT_TPREL16_LO_DS:
5408 case R_PPC64_GOT_TPREL16_HI:
5409 case R_PPC64_GOT_TPREL16_HA:
5410 expecting_tls_get_addr = 0;
5411 if (ok_tprel)
5412 {
5413 /* IE -> LE */
5414 tls_set = 0;
5415 tls_clear = TLS_TPREL;
5416 tls_type = TLS_TLS | TLS_TPREL;
5417 break;
5418 }
5419 else
5420 continue;
5421
5422 case R_PPC64_REL14:
5423 case R_PPC64_REL14_BRTAKEN:
5424 case R_PPC64_REL14_BRNTAKEN:
5425 case R_PPC64_REL24:
5426 if (h != NULL
5427 && h == htab->tls_get_addr)
5428 {
5429 if (!expecting_tls_get_addr
5430 && rel != relstart
5431 && ((ELF64_R_TYPE (rel[-1].r_info)
5432 == R_PPC64_TOC16)
5433 || (ELF64_R_TYPE (rel[-1].r_info)
5434 == R_PPC64_TOC16_LO)))
5435 {
5436 /* Check for toc tls entries. */
5437 char *toc_tls;
5438 int retval;
5439
5440 retval = get_tls_mask (&toc_tls, NULL, &locsyms,
5441 rel - 1, ibfd);
5442 if (retval == 0)
5443 goto err_free_rel;
5444 if (toc_tls != NULL)
5445 expecting_tls_get_addr = retval > 1;
5446 }
5447
5448 if (expecting_tls_get_addr)
5449 {
5450 struct plt_entry *ent;
5451 for (ent = h->plt.plist; ent; ent = ent->next)
5452 if (ent->addend == 0)
5453 {
5454 if (ent->plt.refcount > 0)
5455 ent->plt.refcount -= 1;
5456 break;
5457 }
5458 }
5459 }
5460 expecting_tls_get_addr = 0;
5461 continue;
5462
5463 case R_PPC64_TPREL64:
5464 expecting_tls_get_addr = 0;
5465 if (ok_tprel)
5466 {
5467 /* IE -> LE */
5468 tls_set = TLS_EXPLICIT;
5469 tls_clear = TLS_TPREL;
5470 break;
5471 }
5472 else
5473 continue;
5474
5475 case R_PPC64_DTPMOD64:
5476 expecting_tls_get_addr = 0;
5477 if (rel + 1 < relend
5478 && (rel[1].r_info
5479 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
5480 && rel[1].r_offset == rel->r_offset + 8)
5481 {
5482 if (ok_tprel)
5483 /* GD -> LE */
5484 tls_set = TLS_EXPLICIT | TLS_GD;
5485 else
5486 /* GD -> IE */
5487 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
5488 tls_clear = TLS_GD;
5489 }
5490 else
5491 {
5492 if (!is_local)
5493 continue;
5494
5495 /* LD -> LE */
5496 tls_set = TLS_EXPLICIT;
5497 tls_clear = TLS_LD;
5498 }
5499 break;
5500
5501 default:
5502 expecting_tls_get_addr = 0;
5503 continue;
5504 }
5505
5506 if ((tls_set & TLS_EXPLICIT) == 0)
5507 {
5508 struct got_entry *ent;
5509
5510 /* Adjust got entry for this reloc. */
5511 if (h != NULL)
5512 ent = h->got.glist;
5513 else
5514 ent = elf_local_got_ents (ibfd)[r_symndx];
5515
5516 for (; ent != NULL; ent = ent->next)
5517 if (ent->addend == rel->r_addend
5518 && ent->owner == ibfd
5519 && ent->tls_type == tls_type)
5520 break;
5521 if (ent == NULL)
5522 abort ();
5523
5524 if (tls_set == 0)
5525 {
5526 /* We managed to get rid of a got entry. */
5527 if (ent->got.refcount > 0)
5528 ent->got.refcount -= 1;
5529 }
5530 }
5531 else if (h != NULL)
5532 {
5533 struct ppc_link_hash_entry * eh;
5534 struct ppc_dyn_relocs **pp;
5535 struct ppc_dyn_relocs *p;
5536
5537 /* Adjust dynamic relocs. */
5538 eh = (struct ppc_link_hash_entry *) h;
5539 for (pp = &eh->dyn_relocs;
5540 (p = *pp) != NULL;
5541 pp = &p->next)
5542 if (p->sec == sec)
5543 {
5544 /* If we got rid of a DTPMOD/DTPREL reloc
5545 pair then we'll lose one or two dyn
5546 relocs. */
5547 if (tls_set == (TLS_EXPLICIT | TLS_GD))
5548 p->count -= 1;
5549 p->count -= 1;
5550 if (p->count == 0)
5551 *pp = p->next;
5552 break;
5553 }
5554 }
5555
5556 *tls_mask |= tls_set;
5557 *tls_mask &= ~tls_clear;
5558 }
5559
5560 if (elf_section_data (sec)->relocs != relstart)
5561 free (relstart);
5562 }
5563
5564 if (locsyms != NULL
5565 && (elf_tdata (ibfd)->symtab_hdr.contents
5566 != (unsigned char *) locsyms))
5567 {
5568 if (!info->keep_memory)
5569 free (locsyms);
5570 else
5571 elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms;
5572 }
5573 }
5574 return TRUE;
5575 }
5576
5577 /* Allocate space in .plt, .got and associated reloc sections for
5578 dynamic relocs. */
5579
5580 static bfd_boolean
allocate_dynrelocs(struct elf_link_hash_entry * h,void * inf)5581 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5582 {
5583 struct bfd_link_info *info;
5584 struct ppc_link_hash_table *htab;
5585 asection *s;
5586 struct ppc_link_hash_entry *eh;
5587 struct ppc_dyn_relocs *p;
5588 struct got_entry *gent;
5589
5590 if (h->root.type == bfd_link_hash_indirect)
5591 return TRUE;
5592
5593 if (h->root.type == bfd_link_hash_warning)
5594 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5595
5596 info = (struct bfd_link_info *) inf;
5597 htab = ppc_hash_table (info);
5598
5599 if (htab->elf.dynamic_sections_created
5600 && h->dynindx != -1
5601 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
5602 {
5603 struct plt_entry *pent;
5604 bfd_boolean doneone = FALSE;
5605 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
5606 if (pent->plt.refcount > 0)
5607 {
5608 BFD_ASSERT (((struct ppc_link_hash_entry *) h)->is_func_descriptor);
5609
5610 /* If this is the first .plt entry, make room for the special
5611 first entry. */
5612 s = htab->plt;
5613 if (s->_raw_size == 0)
5614 s->_raw_size += PLT_INITIAL_ENTRY_SIZE;
5615
5616 pent->plt.offset = s->_raw_size;
5617
5618 /* Make room for this entry. */
5619 s->_raw_size += PLT_ENTRY_SIZE;
5620
5621 /* Make room for the .glink code. */
5622 s = htab->glink;
5623 if (s->_raw_size == 0)
5624 s->_raw_size += GLINK_CALL_STUB_SIZE;
5625 /* We need bigger stubs past index 32767. */
5626 if (s->_raw_size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
5627 s->_raw_size += 4;
5628 s->_raw_size += 2*4;
5629
5630 /* We also need to make an entry in the .rela.plt section. */
5631 s = htab->relplt;
5632 s->_raw_size += sizeof (Elf64_External_Rela);
5633 doneone = TRUE;
5634 }
5635 else
5636 pent->plt.offset = (bfd_vma) -1;
5637 if (!doneone)
5638 {
5639 h->plt.plist = NULL;
5640 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
5641 }
5642 }
5643 else
5644 {
5645 h->plt.plist = NULL;
5646 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
5647 }
5648
5649 eh = (struct ppc_link_hash_entry *) h;
5650 /* Run through the TLS GD got entries first if we're changing them
5651 to TPREL. */
5652 if ((eh->tls_mask & TLS_TPRELGD) != 0)
5653 for (gent = h->got.glist; gent != NULL; gent = gent->next)
5654 if (gent->got.refcount > 0
5655 && (gent->tls_type & TLS_GD) != 0)
5656 {
5657 /* This was a GD entry that has been converted to TPREL. If
5658 there happens to be a TPREL entry we can use that one. */
5659 struct got_entry *ent;
5660 for (ent = h->got.glist; ent != NULL; ent = ent->next)
5661 if (ent->got.refcount > 0
5662 && (ent->tls_type & TLS_TPREL) != 0
5663 && ent->addend == gent->addend
5664 && ent->owner == gent->owner)
5665 {
5666 gent->got.refcount = 0;
5667 break;
5668 }
5669
5670 /* If not, then we'll be using our own TPREL entry. */
5671 if (gent->got.refcount != 0)
5672 gent->tls_type = TLS_TLS | TLS_TPREL;
5673 }
5674
5675 for (gent = h->got.glist; gent != NULL; gent = gent->next)
5676 if (gent->got.refcount > 0)
5677 {
5678 bfd_boolean dyn;
5679
5680 /* Make sure this symbol is output as a dynamic symbol.
5681 Undefined weak syms won't yet be marked as dynamic,
5682 nor will all TLS symbols. */
5683 if (h->dynindx == -1
5684 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
5685 {
5686 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5687 return FALSE;
5688 }
5689
5690 if ((gent->tls_type & TLS_LD) != 0
5691 && !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
5692 {
5693 gent->got.offset = ppc64_tlsld_got (gent->owner)->offset;
5694 continue;
5695 }
5696
5697 s = ppc64_elf_tdata (gent->owner)->got;
5698 gent->got.offset = s->_raw_size;
5699 s->_raw_size
5700 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
5701 dyn = htab->elf.dynamic_sections_created;
5702 if ((info->shared
5703 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
5704 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5705 || h->root.type != bfd_link_hash_undefweak))
5706 ppc64_elf_tdata (gent->owner)->relgot->_raw_size
5707 += (gent->tls_type & eh->tls_mask & TLS_GD
5708 ? 2 * sizeof (Elf64_External_Rela)
5709 : sizeof (Elf64_External_Rela));
5710 }
5711 else
5712 gent->got.offset = (bfd_vma) -1;
5713
5714 if (eh->dyn_relocs == NULL)
5715 return TRUE;
5716
5717 /* In the shared -Bsymbolic case, discard space allocated for
5718 dynamic pc-relative relocs against symbols which turn out to be
5719 defined in regular objects. For the normal shared case, discard
5720 space for relocs that have become local due to symbol visibility
5721 changes. */
5722
5723 if (info->shared)
5724 {
5725 /* Relocs that use pc_count are those that appear on a call insn,
5726 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
5727 generated via assembly. We want calls to protected symbols to
5728 resolve directly to the function rather than going via the plt.
5729 If people want function pointer comparisons to work as expected
5730 then they should avoid writing weird assembly. */
5731 if (SYMBOL_CALLS_LOCAL (info, h))
5732 {
5733 struct ppc_dyn_relocs **pp;
5734
5735 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5736 {
5737 p->count -= p->pc_count;
5738 p->pc_count = 0;
5739 if (p->count == 0)
5740 *pp = p->next;
5741 else
5742 pp = &p->next;
5743 }
5744 }
5745
5746 /* Also discard relocs on undefined weak syms with non-default
5747 visibility. */
5748 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5749 && h->root.type == bfd_link_hash_undefweak)
5750 eh->dyn_relocs = NULL;
5751 }
5752 else if (ELIMINATE_COPY_RELOCS)
5753 {
5754 /* For the non-shared case, discard space for relocs against
5755 symbols which turn out to need copy relocs or are not
5756 dynamic. */
5757
5758 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
5759 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
5760 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
5761 {
5762 /* Make sure this symbol is output as a dynamic symbol.
5763 Undefined weak syms won't yet be marked as dynamic. */
5764 if (h->dynindx == -1
5765 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
5766 {
5767 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5768 return FALSE;
5769 }
5770
5771 /* If that succeeded, we know we'll be keeping all the
5772 relocs. */
5773 if (h->dynindx != -1)
5774 goto keep;
5775 }
5776
5777 eh->dyn_relocs = NULL;
5778
5779 keep: ;
5780 }
5781
5782 /* Finally, allocate space. */
5783 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5784 {
5785 asection *sreloc = elf_section_data (p->sec)->sreloc;
5786 sreloc->_raw_size += p->count * sizeof (Elf64_External_Rela);
5787 }
5788
5789 return TRUE;
5790 }
5791
5792 /* Find any dynamic relocs that apply to read-only sections. */
5793
5794 static bfd_boolean
readonly_dynrelocs(struct elf_link_hash_entry * h,void * inf)5795 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5796 {
5797 struct ppc_link_hash_entry *eh;
5798 struct ppc_dyn_relocs *p;
5799
5800 if (h->root.type == bfd_link_hash_warning)
5801 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5802
5803 eh = (struct ppc_link_hash_entry *) h;
5804 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5805 {
5806 asection *s = p->sec->output_section;
5807
5808 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5809 {
5810 struct bfd_link_info *info = inf;
5811
5812 info->flags |= DF_TEXTREL;
5813
5814 /* Not an error, just cut short the traversal. */
5815 return FALSE;
5816 }
5817 }
5818 return TRUE;
5819 }
5820
5821 /* Set the sizes of the dynamic sections. */
5822
5823 static bfd_boolean
ppc64_elf_size_dynamic_sections(bfd * output_bfd ATTRIBUTE_UNUSED,struct bfd_link_info * info)5824 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
5825 struct bfd_link_info *info)
5826 {
5827 struct ppc_link_hash_table *htab;
5828 bfd *dynobj;
5829 asection *s;
5830 bfd_boolean relocs;
5831 bfd *ibfd;
5832
5833 htab = ppc_hash_table (info);
5834 dynobj = htab->elf.dynobj;
5835 if (dynobj == NULL)
5836 abort ();
5837
5838 if (htab->elf.dynamic_sections_created)
5839 {
5840 /* Set the contents of the .interp section to the interpreter. */
5841 if (info->executable)
5842 {
5843 s = bfd_get_section_by_name (dynobj, ".interp");
5844 if (s == NULL)
5845 abort ();
5846 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
5847 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5848 }
5849 }
5850
5851 /* Set up .got offsets for local syms, and space for local dynamic
5852 relocs. */
5853 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5854 {
5855 struct got_entry **lgot_ents;
5856 struct got_entry **end_lgot_ents;
5857 char *lgot_masks;
5858 bfd_size_type locsymcount;
5859 Elf_Internal_Shdr *symtab_hdr;
5860 asection *srel;
5861
5862 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
5863 continue;
5864
5865 if (ppc64_tlsld_got (ibfd)->refcount > 0)
5866 {
5867 s = ppc64_elf_tdata (ibfd)->got;
5868 ppc64_tlsld_got (ibfd)->offset = s->_raw_size;
5869 s->_raw_size += 16;
5870 if (info->shared)
5871 {
5872 srel = ppc64_elf_tdata (ibfd)->relgot;
5873 srel->_raw_size += sizeof (Elf64_External_Rela);
5874 }
5875 }
5876 else
5877 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
5878
5879 for (s = ibfd->sections; s != NULL; s = s->next)
5880 {
5881 struct ppc_dyn_relocs *p;
5882
5883 for (p = *((struct ppc_dyn_relocs **)
5884 &elf_section_data (s)->local_dynrel);
5885 p != NULL;
5886 p = p->next)
5887 {
5888 if (!bfd_is_abs_section (p->sec)
5889 && bfd_is_abs_section (p->sec->output_section))
5890 {
5891 /* Input section has been discarded, either because
5892 it is a copy of a linkonce section or due to
5893 linker script /DISCARD/, so we'll be discarding
5894 the relocs too. */
5895 }
5896 else if (p->count != 0)
5897 {
5898 srel = elf_section_data (p->sec)->sreloc;
5899 srel->_raw_size += p->count * sizeof (Elf64_External_Rela);
5900 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
5901 info->flags |= DF_TEXTREL;
5902 }
5903 }
5904 }
5905
5906 lgot_ents = elf_local_got_ents (ibfd);
5907 if (!lgot_ents)
5908 continue;
5909
5910 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5911 locsymcount = symtab_hdr->sh_info;
5912 end_lgot_ents = lgot_ents + locsymcount;
5913 lgot_masks = (char *) end_lgot_ents;
5914 s = ppc64_elf_tdata (ibfd)->got;
5915 srel = ppc64_elf_tdata (ibfd)->relgot;
5916 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
5917 {
5918 struct got_entry *ent;
5919
5920 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
5921 if (ent->got.refcount > 0)
5922 {
5923 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
5924 {
5925 if (ppc64_tlsld_got (ibfd)->offset == (bfd_vma) -1)
5926 {
5927 ppc64_tlsld_got (ibfd)->offset = s->_raw_size;
5928 s->_raw_size += 16;
5929 if (info->shared)
5930 srel->_raw_size += sizeof (Elf64_External_Rela);
5931 }
5932 ent->got.offset = ppc64_tlsld_got (ibfd)->offset;
5933 }
5934 else
5935 {
5936 ent->got.offset = s->_raw_size;
5937 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
5938 {
5939 s->_raw_size += 16;
5940 if (info->shared)
5941 srel->_raw_size += 2 * sizeof (Elf64_External_Rela);
5942 }
5943 else
5944 {
5945 s->_raw_size += 8;
5946 if (info->shared)
5947 srel->_raw_size += sizeof (Elf64_External_Rela);
5948 }
5949 }
5950 }
5951 else
5952 ent->got.offset = (bfd_vma) -1;
5953 }
5954 }
5955
5956 /* Allocate global sym .plt and .got entries, and space for global
5957 sym dynamic relocs. */
5958 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
5959
5960 /* We now have determined the sizes of the various dynamic sections.
5961 Allocate memory for them. */
5962 relocs = FALSE;
5963 for (s = dynobj->sections; s != NULL; s = s->next)
5964 {
5965 if ((s->flags & SEC_LINKER_CREATED) == 0)
5966 continue;
5967
5968 /* Reset _cooked_size since prelim layout will set it wrongly,
5969 and a non-zero _cooked_size sticks. */
5970 s->_cooked_size = 0;
5971
5972 if (s == htab->brlt || s == htab->relbrlt)
5973 /* These haven't been allocated yet; don't strip. */
5974 continue;
5975 else if (s == htab->got
5976 || s == htab->plt
5977 || s == htab->glink)
5978 {
5979 /* Strip this section if we don't need it; see the
5980 comment below. */
5981 }
5982 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
5983 {
5984 if (s->_raw_size == 0)
5985 {
5986 /* If we don't need this section, strip it from the
5987 output file. This is mostly to handle .rela.bss and
5988 .rela.plt. We must create both sections in
5989 create_dynamic_sections, because they must be created
5990 before the linker maps input sections to output
5991 sections. The linker does that before
5992 adjust_dynamic_symbol is called, and it is that
5993 function which decides whether anything needs to go
5994 into these sections. */
5995 }
5996 else
5997 {
5998 if (s != htab->relplt)
5999 relocs = TRUE;
6000
6001 /* We use the reloc_count field as a counter if we need
6002 to copy relocs into the output file. */
6003 s->reloc_count = 0;
6004 }
6005 }
6006 else
6007 {
6008 /* It's not one of our sections, so don't allocate space. */
6009 continue;
6010 }
6011
6012 if (s->_raw_size == 0)
6013 {
6014 _bfd_strip_section_from_output (info, s);
6015 continue;
6016 }
6017
6018 /* .plt is in the bss section. We don't initialise it. */
6019 if (s == htab->plt)
6020 continue;
6021
6022 /* Allocate memory for the section contents. We use bfd_zalloc
6023 here in case unused entries are not reclaimed before the
6024 section's contents are written out. This should not happen,
6025 but this way if it does we get a R_PPC64_NONE reloc in .rela
6026 sections instead of garbage.
6027 We also rely on the section contents being zero when writing
6028 the GOT. */
6029 s->contents = bfd_zalloc (dynobj, s->_raw_size);
6030 if (s->contents == NULL)
6031 return FALSE;
6032 }
6033
6034 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6035 {
6036 s = ppc64_elf_tdata (ibfd)->got;
6037 if (s != NULL && s != htab->got)
6038 {
6039 s->_cooked_size = 0;
6040 if (s->_raw_size == 0)
6041 _bfd_strip_section_from_output (info, s);
6042 else
6043 {
6044 s->contents = bfd_zalloc (ibfd, s->_raw_size);
6045 if (s->contents == NULL)
6046 return FALSE;
6047 }
6048 }
6049 s = ppc64_elf_tdata (ibfd)->relgot;
6050 if (s != NULL)
6051 {
6052 s->_cooked_size = 0;
6053 if (s->_raw_size == 0)
6054 _bfd_strip_section_from_output (info, s);
6055 else
6056 {
6057 s->contents = bfd_zalloc (ibfd, s->_raw_size);
6058 if (s->contents == NULL)
6059 return FALSE;
6060 relocs = TRUE;
6061 s->reloc_count = 0;
6062 }
6063 }
6064 }
6065
6066 if (htab->elf.dynamic_sections_created)
6067 {
6068 /* Add some entries to the .dynamic section. We fill in the
6069 values later, in ppc64_elf_finish_dynamic_sections, but we
6070 must add the entries now so that we get the correct size for
6071 the .dynamic section. The DT_DEBUG entry is filled in by the
6072 dynamic linker and used by the debugger. */
6073 #define add_dynamic_entry(TAG, VAL) \
6074 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6075
6076 if (info->executable)
6077 {
6078 if (!add_dynamic_entry (DT_DEBUG, 0))
6079 return FALSE;
6080 }
6081
6082 if (htab->plt != NULL && htab->plt->_raw_size != 0)
6083 {
6084 if (!add_dynamic_entry (DT_PLTGOT, 0)
6085 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6086 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6087 || !add_dynamic_entry (DT_JMPREL, 0)
6088 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
6089 return FALSE;
6090 }
6091
6092 if (NO_OPD_RELOCS)
6093 {
6094 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
6095 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
6096 return FALSE;
6097 }
6098
6099 if (relocs)
6100 {
6101 if (!add_dynamic_entry (DT_RELA, 0)
6102 || !add_dynamic_entry (DT_RELASZ, 0)
6103 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
6104 return FALSE;
6105
6106 /* If any dynamic relocs apply to a read-only section,
6107 then we need a DT_TEXTREL entry. */
6108 if ((info->flags & DF_TEXTREL) == 0)
6109 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
6110
6111 if ((info->flags & DF_TEXTREL) != 0)
6112 {
6113 if (!add_dynamic_entry (DT_TEXTREL, 0))
6114 return FALSE;
6115 }
6116 }
6117 }
6118 #undef add_dynamic_entry
6119
6120 return TRUE;
6121 }
6122
6123 /* Determine the type of stub needed, if any, for a call. */
6124
6125 static inline enum ppc_stub_type
ppc_type_of_stub(asection * input_sec,const Elf_Internal_Rela * rel,struct ppc_link_hash_entry ** hash,bfd_vma destination)6126 ppc_type_of_stub (asection *input_sec,
6127 const Elf_Internal_Rela *rel,
6128 struct ppc_link_hash_entry **hash,
6129 bfd_vma destination)
6130 {
6131 struct ppc_link_hash_entry *h = *hash;
6132 bfd_vma location;
6133 bfd_vma branch_offset;
6134 bfd_vma max_branch_offset;
6135 enum elf_ppc64_reloc_type r_type;
6136
6137 if (h != NULL)
6138 {
6139 if (h->oh != NULL
6140 && h->oh->dynindx != -1)
6141 {
6142 struct plt_entry *ent;
6143 for (ent = h->oh->plt.plist; ent != NULL; ent = ent->next)
6144 if (ent->addend == rel->r_addend
6145 && ent->plt.offset != (bfd_vma) -1)
6146 {
6147 *hash = (struct ppc_link_hash_entry *) h->oh;
6148 return ppc_stub_plt_call;
6149 }
6150 }
6151
6152 if (!(h->elf.root.type == bfd_link_hash_defined
6153 || h->elf.root.type == bfd_link_hash_defweak)
6154 || h->elf.root.u.def.section->output_section == NULL)
6155 return ppc_stub_none;
6156 }
6157
6158 /* Determine where the call point is. */
6159 location = (input_sec->output_offset
6160 + input_sec->output_section->vma
6161 + rel->r_offset);
6162
6163 branch_offset = destination - location;
6164 r_type = ELF64_R_TYPE (rel->r_info);
6165
6166 /* Determine if a long branch stub is needed. */
6167 max_branch_offset = 1 << 25;
6168 if (r_type != R_PPC64_REL24)
6169 max_branch_offset = 1 << 15;
6170
6171 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
6172 /* We need a stub. Figure out whether a long_branch or plt_branch
6173 is needed later. */
6174 return ppc_stub_long_branch;
6175
6176 return ppc_stub_none;
6177 }
6178
6179 /* Build a .plt call stub. */
6180
6181 static inline bfd_byte *
build_plt_stub(bfd * obfd,bfd_byte * p,int offset)6182 build_plt_stub (bfd *obfd, bfd_byte *p, int offset)
6183 {
6184 #define PPC_LO(v) ((v) & 0xffff)
6185 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6186 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6187
6188 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
6189 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
6190 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
6191 if (PPC_HA (offset + 8) != PPC_HA (offset))
6192 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
6193 offset += 8;
6194 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
6195 if (PPC_HA (offset + 8) != PPC_HA (offset))
6196 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
6197 offset += 8;
6198 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
6199 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
6200 bfd_put_32 (obfd, BCTR, p), p += 4;
6201 return p;
6202 }
6203
6204 static bfd_boolean
ppc_build_one_stub(struct bfd_hash_entry * gen_entry,void * in_arg)6205 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
6206 {
6207 struct ppc_stub_hash_entry *stub_entry;
6208 struct ppc_branch_hash_entry *br_entry;
6209 struct bfd_link_info *info;
6210 struct ppc_link_hash_table *htab;
6211 bfd_byte *loc;
6212 bfd_byte *p;
6213 unsigned int indx;
6214 struct plt_entry *ent;
6215 bfd_vma off;
6216 int size;
6217
6218 /* Massage our args to the form they really have. */
6219 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
6220 info = in_arg;
6221
6222 htab = ppc_hash_table (info);
6223
6224 /* Make a note of the offset within the stubs for this entry. */
6225 stub_entry->stub_offset = stub_entry->stub_sec->_cooked_size;
6226 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
6227
6228 htab->stub_count[stub_entry->stub_type - 1] += 1;
6229 switch (stub_entry->stub_type)
6230 {
6231 case ppc_stub_long_branch:
6232 case ppc_stub_long_branch_r2off:
6233 /* Branches are relative. This is where we are going to. */
6234 off = (stub_entry->target_value
6235 + stub_entry->target_section->output_offset
6236 + stub_entry->target_section->output_section->vma);
6237
6238 /* And this is where we are coming from. */
6239 off -= (stub_entry->stub_offset
6240 + stub_entry->stub_sec->output_offset
6241 + stub_entry->stub_sec->output_section->vma);
6242
6243 if (stub_entry->stub_type != ppc_stub_long_branch_r2off)
6244 size = 4;
6245 else
6246 {
6247 bfd_vma r2off;
6248
6249 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
6250 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6251 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
6252 loc += 4;
6253 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
6254 loc += 4;
6255 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
6256 loc += 4;
6257 off -= 12;
6258 size = 16;
6259 }
6260 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
6261
6262 BFD_ASSERT (off + (1 << 25) < (bfd_vma) (1 << 26));
6263 break;
6264
6265 case ppc_stub_plt_branch:
6266 case ppc_stub_plt_branch_r2off:
6267 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
6268 stub_entry->root.string + 9,
6269 FALSE, FALSE);
6270 if (br_entry == NULL)
6271 {
6272 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
6273 stub_entry->root.string + 9);
6274 htab->stub_error = TRUE;
6275 return FALSE;
6276 }
6277
6278 off = (stub_entry->target_value
6279 + stub_entry->target_section->output_offset
6280 + stub_entry->target_section->output_section->vma);
6281
6282 bfd_put_64 (htab->brlt->owner, off,
6283 htab->brlt->contents + br_entry->offset);
6284
6285 if (info->shared)
6286 {
6287 /* Create a reloc for the branch lookup table entry. */
6288 Elf_Internal_Rela rela;
6289 bfd_byte *rl;
6290
6291 rela.r_offset = (br_entry->offset
6292 + htab->brlt->output_offset
6293 + htab->brlt->output_section->vma);
6294 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
6295 rela.r_addend = off;
6296
6297 rl = htab->relbrlt->contents;
6298 rl += htab->relbrlt->reloc_count++ * sizeof (Elf64_External_Rela);
6299 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
6300 }
6301
6302 off = (br_entry->offset
6303 + htab->brlt->output_offset
6304 + htab->brlt->output_section->vma
6305 - elf_gp (htab->brlt->output_section->owner)
6306 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6307
6308 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
6309 {
6310 (*_bfd_error_handler)
6311 (_("linkage table error against `%s'"),
6312 stub_entry->root.string);
6313 bfd_set_error (bfd_error_bad_value);
6314 htab->stub_error = TRUE;
6315 return FALSE;
6316 }
6317
6318 indx = off;
6319 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
6320 {
6321 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
6322 loc += 4;
6323 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
6324 size = 16;
6325 }
6326 else
6327 {
6328 bfd_vma r2off;
6329
6330 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
6331 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6332 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
6333 loc += 4;
6334 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
6335 loc += 4;
6336 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
6337 loc += 4;
6338 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
6339 loc += 4;
6340 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
6341 size = 28;
6342 }
6343 loc += 4;
6344 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
6345 loc += 4;
6346 bfd_put_32 (htab->stub_bfd, BCTR, loc);
6347 break;
6348
6349 case ppc_stub_plt_call:
6350 /* Do the best we can for shared libraries built without
6351 exporting ".foo" for each "foo". This can happen when symbol
6352 versioning scripts strip all bar a subset of symbols. */
6353 if (stub_entry->h->oh->root.type != bfd_link_hash_defined
6354 && stub_entry->h->oh->root.type != bfd_link_hash_defweak)
6355 {
6356 /* Point the symbol at the stub. There may be multiple stubs,
6357 we don't really care; The main thing is to make this sym
6358 defined somewhere. Maybe defining the symbol in the stub
6359 section is a silly idea. If we didn't do this, htab->top_id
6360 could disappear. */
6361 stub_entry->h->oh->root.type = bfd_link_hash_defined;
6362 stub_entry->h->oh->root.u.def.section = stub_entry->stub_sec;
6363 stub_entry->h->oh->root.u.def.value = stub_entry->stub_offset;
6364 }
6365
6366 /* Now build the stub. */
6367 off = (bfd_vma) -1;
6368 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
6369 if (ent->addend == stub_entry->addend)
6370 {
6371 off = ent->plt.offset;
6372 break;
6373 }
6374 if (off >= (bfd_vma) -2)
6375 abort ();
6376
6377 off &= ~ (bfd_vma) 1;
6378 off += (htab->plt->output_offset
6379 + htab->plt->output_section->vma
6380 - elf_gp (htab->plt->output_section->owner)
6381 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6382
6383 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
6384 {
6385 (*_bfd_error_handler)
6386 (_("linkage table error against `%s'"),
6387 stub_entry->h->elf.root.root.string);
6388 bfd_set_error (bfd_error_bad_value);
6389 htab->stub_error = TRUE;
6390 return FALSE;
6391 }
6392
6393 p = build_plt_stub (htab->stub_bfd, loc, off);
6394 size = p - loc;
6395 break;
6396
6397 default:
6398 BFD_FAIL ();
6399 return FALSE;
6400 }
6401
6402 stub_entry->stub_sec->_cooked_size += size;
6403
6404 if (htab->emit_stub_syms
6405 && !(stub_entry->stub_type == ppc_stub_plt_call
6406 && stub_entry->h->oh->root.type == bfd_link_hash_defined
6407 && stub_entry->h->oh->root.u.def.section == stub_entry->stub_sec
6408 && stub_entry->h->oh->root.u.def.value == stub_entry->stub_offset))
6409 {
6410 struct elf_link_hash_entry *h;
6411 h = elf_link_hash_lookup (&htab->elf, stub_entry->root.string,
6412 TRUE, FALSE, FALSE);
6413 if (h == NULL)
6414 return FALSE;
6415 if (h->root.type == bfd_link_hash_new)
6416 {
6417 h->root.type = bfd_link_hash_defined;
6418 h->root.u.def.section = stub_entry->stub_sec;
6419 h->root.u.def.value = stub_entry->stub_offset;
6420 h->elf_link_hash_flags = (ELF_LINK_HASH_REF_REGULAR
6421 | ELF_LINK_HASH_DEF_REGULAR
6422 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
6423 | ELF_LINK_FORCED_LOCAL);
6424 }
6425 }
6426
6427 return TRUE;
6428 }
6429
6430 /* As above, but don't actually build the stub. Just bump offset so
6431 we know stub section sizes, and select plt_branch stubs where
6432 long_branch stubs won't do. */
6433
6434 static bfd_boolean
ppc_size_one_stub(struct bfd_hash_entry * gen_entry,void * in_arg)6435 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
6436 {
6437 struct ppc_stub_hash_entry *stub_entry;
6438 struct bfd_link_info *info;
6439 struct ppc_link_hash_table *htab;
6440 bfd_vma off;
6441 int size;
6442
6443 /* Massage our args to the form they really have. */
6444 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
6445 info = in_arg;
6446
6447 htab = ppc_hash_table (info);
6448
6449 if (stub_entry->stub_type == ppc_stub_plt_call)
6450 {
6451 struct plt_entry *ent;
6452 off = (bfd_vma) -1;
6453 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
6454 if (ent->addend == stub_entry->addend)
6455 {
6456 off = ent->plt.offset & ~(bfd_vma) 1;
6457 break;
6458 }
6459 if (off >= (bfd_vma) -2)
6460 abort ();
6461 off += (htab->plt->output_offset
6462 + htab->plt->output_section->vma
6463 - elf_gp (htab->plt->output_section->owner)
6464 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6465
6466 size = PLT_CALL_STUB_SIZE;
6467 if (PPC_HA (off + 16) != PPC_HA (off))
6468 size += 4;
6469 }
6470 else
6471 {
6472 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
6473 variants. */
6474 off = (stub_entry->target_value
6475 + stub_entry->target_section->output_offset
6476 + stub_entry->target_section->output_section->vma);
6477 off -= (stub_entry->stub_sec->_raw_size
6478 + stub_entry->stub_sec->output_offset
6479 + stub_entry->stub_sec->output_section->vma);
6480
6481 /* Reset the stub type from the plt variant in case we now
6482 can reach with a shorter stub. */
6483 if (stub_entry->stub_type >= ppc_stub_plt_branch)
6484 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
6485
6486 size = 4;
6487 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
6488 {
6489 off -= 12;
6490 size = 16;
6491 }
6492
6493 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
6494 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
6495 {
6496 struct ppc_branch_hash_entry *br_entry;
6497
6498 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
6499 stub_entry->root.string + 9,
6500 TRUE, FALSE);
6501 if (br_entry == NULL)
6502 {
6503 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
6504 stub_entry->root.string + 9);
6505 htab->stub_error = TRUE;
6506 return FALSE;
6507 }
6508
6509 if (br_entry->iter != htab->stub_iteration)
6510 {
6511 br_entry->iter = htab->stub_iteration;
6512 br_entry->offset = htab->brlt->_raw_size;
6513 htab->brlt->_raw_size += 8;
6514
6515 if (info->shared)
6516 htab->relbrlt->_raw_size += sizeof (Elf64_External_Rela);
6517 }
6518
6519 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
6520 size = 16;
6521 if (stub_entry->stub_type != ppc_stub_plt_branch)
6522 size = 28;
6523 }
6524 }
6525
6526 stub_entry->stub_sec->_raw_size += size;
6527 return TRUE;
6528 }
6529
6530 /* Set up various things so that we can make a list of input sections
6531 for each output section included in the link. Returns -1 on error,
6532 0 when no stubs will be needed, and 1 on success. */
6533
6534 int
ppc64_elf_setup_section_lists(bfd * output_bfd,struct bfd_link_info * info)6535 ppc64_elf_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info)
6536 {
6537 bfd *input_bfd;
6538 int top_id, top_index, id;
6539 asection *section;
6540 asection **input_list;
6541 bfd_size_type amt;
6542 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6543
6544 if (htab->brlt == NULL)
6545 return 0;
6546
6547 /* Find the top input section id. */
6548 for (input_bfd = info->input_bfds, top_id = 3;
6549 input_bfd != NULL;
6550 input_bfd = input_bfd->link_next)
6551 {
6552 for (section = input_bfd->sections;
6553 section != NULL;
6554 section = section->next)
6555 {
6556 if (top_id < section->id)
6557 top_id = section->id;
6558 }
6559 }
6560
6561 htab->top_id = top_id;
6562 amt = sizeof (struct map_stub) * (top_id + 1);
6563 htab->stub_group = bfd_zmalloc (amt);
6564 if (htab->stub_group == NULL)
6565 return -1;
6566
6567 /* Set toc_off for com, und, abs and ind sections. */
6568 for (id = 0; id < 3; id++)
6569 htab->stub_group[id].toc_off = TOC_BASE_OFF;
6570
6571 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
6572
6573 /* We can't use output_bfd->section_count here to find the top output
6574 section index as some sections may have been removed, and
6575 _bfd_strip_section_from_output doesn't renumber the indices. */
6576 for (section = output_bfd->sections, top_index = 0;
6577 section != NULL;
6578 section = section->next)
6579 {
6580 if (top_index < section->index)
6581 top_index = section->index;
6582 }
6583
6584 htab->top_index = top_index;
6585 amt = sizeof (asection *) * (top_index + 1);
6586 input_list = bfd_zmalloc (amt);
6587 htab->input_list = input_list;
6588 if (input_list == NULL)
6589 return -1;
6590
6591 return 1;
6592 }
6593
6594 /* The linker repeatedly calls this function for each TOC input section
6595 and linker generated GOT section. Group input bfds such that the toc
6596 within a group is less than 64k in size. Will break with cute linker
6597 scripts that play games with dot in the output toc section. */
6598
6599 void
ppc64_elf_next_toc_section(struct bfd_link_info * info,asection * isec)6600 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
6601 {
6602 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6603
6604 if (!htab->no_multi_toc)
6605 {
6606 bfd_vma addr = isec->output_offset + isec->output_section->vma;
6607 bfd_vma off = addr - htab->toc_curr;
6608 if (off + isec->_raw_size > 0x10000)
6609 {
6610 htab->toc_curr = addr;
6611 htab->multi_toc_needed = 1;
6612 }
6613 elf_gp (isec->owner) = (htab->toc_curr
6614 - elf_gp (isec->output_section->owner)
6615 + TOC_BASE_OFF);
6616 }
6617 }
6618
6619 /* Called after the last call to the above function. */
6620
6621 void
ppc64_elf_reinit_toc(bfd * output_bfd ATTRIBUTE_UNUSED,struct bfd_link_info * info)6622 ppc64_elf_reinit_toc (bfd *output_bfd ATTRIBUTE_UNUSED,
6623 struct bfd_link_info *info)
6624 {
6625 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6626
6627 /* toc_curr tracks the TOC offset used for code sections below in
6628 ppc64_elf_next_input_section. Start off at 0x8000. */
6629 htab->toc_curr = TOC_BASE_OFF;
6630 }
6631
6632 /* No toc references were found in ISEC. If the code in ISEC makes no
6633 calls, then there's no need to use toc adjusting stubs when branching
6634 into ISEC. Actually, indirect calls from ISEC are OK as they will
6635 load r2. */
6636
6637 static int
toc_adjusting_stub_needed(struct bfd_link_info * info,asection * isec)6638 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
6639 {
6640 bfd_byte *contents;
6641 bfd_size_type i;
6642 int ret;
6643 int branch_ok;
6644
6645 /* We know none of our code bearing sections will need toc stubs. */
6646 if ((isec->flags & SEC_LINKER_CREATED) != 0)
6647 return 0;
6648
6649 if (isec->_raw_size == 0)
6650 return 0;
6651
6652 /* Hack for linux kernel. .fixup contains branches, but only back to
6653 the function that hit an exception. */
6654 branch_ok = strcmp (isec->name, ".fixup") == 0;
6655
6656 contents = elf_section_data (isec)->this_hdr.contents;
6657 if (contents == NULL)
6658 {
6659 contents = bfd_malloc (isec->_raw_size);
6660 if (contents == NULL)
6661 return -1;
6662 if (! bfd_get_section_contents (isec->owner, isec, contents,
6663 0, isec->_raw_size))
6664 {
6665 free (contents);
6666 return -1;
6667 }
6668 if (info->keep_memory)
6669 elf_section_data (isec)->this_hdr.contents = contents;
6670 }
6671
6672 /* Code scan, because we don't necessarily have relocs on calls to
6673 static functions. */
6674 ret = 0;
6675 for (i = 0; i < isec->_raw_size; i += 4)
6676 {
6677 unsigned long insn = bfd_get_32 (isec->owner, contents + i);
6678 /* Is this a branch? */
6679 if ((insn & (0x3f << 26)) == (18 << 26)
6680 /* If branch and link, it's a function call. */
6681 && ((insn & 1) != 0
6682 /* Sibling calls use a plain branch. I don't know a way
6683 of deciding whether a branch is really a sibling call. */
6684 || !branch_ok))
6685 {
6686 ret = 1;
6687 break;
6688 }
6689 }
6690
6691 if (elf_section_data (isec)->this_hdr.contents != contents)
6692 free (contents);
6693 return ret;
6694 }
6695
6696 /* The linker repeatedly calls this function for each input section,
6697 in the order that input sections are linked into output sections.
6698 Build lists of input sections to determine groupings between which
6699 we may insert linker stubs. */
6700
6701 bfd_boolean
ppc64_elf_next_input_section(struct bfd_link_info * info,asection * isec)6702 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
6703 {
6704 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6705 int ret;
6706
6707 if ((isec->output_section->flags & SEC_CODE) != 0
6708 && isec->output_section->index <= htab->top_index)
6709 {
6710 asection **list = htab->input_list + isec->output_section->index;
6711 /* Steal the link_sec pointer for our list. */
6712 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
6713 /* This happens to make the list in reverse order,
6714 which is what we want. */
6715 PREV_SEC (isec) = *list;
6716 *list = isec;
6717 }
6718
6719 /* If a code section has a function that uses the TOC then we need
6720 to use the right TOC (obviously). Also, make sure that .opd gets
6721 the correct TOC value for R_PPC64_TOC relocs that don't have or
6722 can't find their function symbol (shouldn't ever happen now). */
6723 if (isec->has_gp_reloc || (isec->flags & SEC_CODE) == 0)
6724 {
6725 if (elf_gp (isec->owner) != 0)
6726 htab->toc_curr = elf_gp (isec->owner);
6727 }
6728 else if ((ret = toc_adjusting_stub_needed (info, isec)) < 0)
6729 return FALSE;
6730 else
6731 isec->has_gp_reloc = ret;
6732
6733 /* Functions that don't use the TOC can belong in any TOC group.
6734 Use the last TOC base. This happens to make _init and _fini
6735 pasting work. */
6736 htab->stub_group[isec->id].toc_off = htab->toc_curr;
6737 return TRUE;
6738 }
6739
6740 /* See whether we can group stub sections together. Grouping stub
6741 sections may result in fewer stubs. More importantly, we need to
6742 put all .init* and .fini* stubs at the beginning of the .init or
6743 .fini output sections respectively, because glibc splits the
6744 _init and _fini functions into multiple parts. Putting a stub in
6745 the middle of a function is not a good idea. */
6746
6747 static void
group_sections(struct ppc_link_hash_table * htab,bfd_size_type stub_group_size,bfd_boolean stubs_always_before_branch)6748 group_sections (struct ppc_link_hash_table *htab,
6749 bfd_size_type stub_group_size,
6750 bfd_boolean stubs_always_before_branch)
6751 {
6752 asection **list = htab->input_list + htab->top_index;
6753 do
6754 {
6755 asection *tail = *list;
6756 while (tail != NULL)
6757 {
6758 asection *curr;
6759 asection *prev;
6760 bfd_size_type total;
6761 bfd_boolean big_sec;
6762 bfd_vma curr_toc;
6763
6764 curr = tail;
6765 if (tail->_cooked_size)
6766 total = tail->_cooked_size;
6767 else
6768 total = tail->_raw_size;
6769 big_sec = total >= stub_group_size;
6770 curr_toc = htab->stub_group[tail->id].toc_off;
6771
6772 while ((prev = PREV_SEC (curr)) != NULL
6773 && ((total += curr->output_offset - prev->output_offset)
6774 < stub_group_size)
6775 && htab->stub_group[prev->id].toc_off == curr_toc)
6776 curr = prev;
6777
6778 /* OK, the size from the start of CURR to the end is less
6779 than stub_group_size and thus can be handled by one stub
6780 section. (or the tail section is itself larger than
6781 stub_group_size, in which case we may be toast.) We
6782 should really be keeping track of the total size of stubs
6783 added here, as stubs contribute to the final output
6784 section size. That's a little tricky, and this way will
6785 only break if stubs added make the total size more than
6786 2^25, ie. for the default stub_group_size, if stubs total
6787 more than 2097152 bytes, or nearly 75000 plt call stubs. */
6788 do
6789 {
6790 prev = PREV_SEC (tail);
6791 /* Set up this stub group. */
6792 htab->stub_group[tail->id].link_sec = curr;
6793 }
6794 while (tail != curr && (tail = prev) != NULL);
6795
6796 /* But wait, there's more! Input sections up to stub_group_size
6797 bytes before the stub section can be handled by it too.
6798 Don't do this if we have a really large section after the
6799 stubs, as adding more stubs increases the chance that
6800 branches may not reach into the stub section. */
6801 if (!stubs_always_before_branch && !big_sec)
6802 {
6803 total = 0;
6804 while (prev != NULL
6805 && ((total += tail->output_offset - prev->output_offset)
6806 < stub_group_size)
6807 && htab->stub_group[prev->id].toc_off == curr_toc)
6808 {
6809 tail = prev;
6810 prev = PREV_SEC (tail);
6811 htab->stub_group[tail->id].link_sec = curr;
6812 }
6813 }
6814 tail = prev;
6815 }
6816 }
6817 while (list-- != htab->input_list);
6818 free (htab->input_list);
6819 #undef PREV_SEC
6820 }
6821
6822 /* Determine and set the size of the stub section for a final link.
6823
6824 The basic idea here is to examine all the relocations looking for
6825 PC-relative calls to a target that is unreachable with a "bl"
6826 instruction. */
6827
6828 bfd_boolean
ppc64_elf_size_stubs(bfd * output_bfd,struct bfd_link_info * info,bfd_signed_vma group_size,asection * (* add_stub_section)(const char *,asection *),void (* layout_sections_again)(void))6829 ppc64_elf_size_stubs (bfd *output_bfd,
6830 struct bfd_link_info *info,
6831 bfd_signed_vma group_size,
6832 asection *(*add_stub_section) (const char *, asection *),
6833 void (*layout_sections_again) (void))
6834 {
6835 bfd_size_type stub_group_size;
6836 bfd_boolean stubs_always_before_branch;
6837 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6838
6839 /* Stash our params away. */
6840 htab->add_stub_section = add_stub_section;
6841 htab->layout_sections_again = layout_sections_again;
6842 stubs_always_before_branch = group_size < 0;
6843 if (group_size < 0)
6844 stub_group_size = -group_size;
6845 else
6846 stub_group_size = group_size;
6847 if (stub_group_size == 1)
6848 {
6849 /* Default values. */
6850 if (stubs_always_before_branch)
6851 {
6852 stub_group_size = 0x1e00000;
6853 if (htab->has_14bit_branch)
6854 stub_group_size = 0x7800;
6855 }
6856 else
6857 {
6858 stub_group_size = 0x1c00000;
6859 if (htab->has_14bit_branch)
6860 stub_group_size = 0x7000;
6861 }
6862 }
6863
6864 group_sections (htab, stub_group_size, stubs_always_before_branch);
6865
6866 while (1)
6867 {
6868 bfd *input_bfd;
6869 unsigned int bfd_indx;
6870 asection *stub_sec;
6871 bfd_boolean stub_changed;
6872
6873 htab->stub_iteration += 1;
6874 stub_changed = FALSE;
6875
6876 for (input_bfd = info->input_bfds, bfd_indx = 0;
6877 input_bfd != NULL;
6878 input_bfd = input_bfd->link_next, bfd_indx++)
6879 {
6880 Elf_Internal_Shdr *symtab_hdr;
6881 asection *section;
6882 Elf_Internal_Sym *local_syms = NULL;
6883
6884 /* We'll need the symbol table in a second. */
6885 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
6886 if (symtab_hdr->sh_info == 0)
6887 continue;
6888
6889 /* Walk over each section attached to the input bfd. */
6890 for (section = input_bfd->sections;
6891 section != NULL;
6892 section = section->next)
6893 {
6894 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
6895
6896 /* If there aren't any relocs, then there's nothing more
6897 to do. */
6898 if ((section->flags & SEC_RELOC) == 0
6899 || section->reloc_count == 0)
6900 continue;
6901
6902 /* If this section is a link-once section that will be
6903 discarded, then don't create any stubs. */
6904 if (section->output_section == NULL
6905 || section->output_section->owner != output_bfd)
6906 continue;
6907
6908 /* Get the relocs. */
6909 internal_relocs
6910 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
6911 info->keep_memory);
6912 if (internal_relocs == NULL)
6913 goto error_ret_free_local;
6914
6915 /* Now examine each relocation. */
6916 irela = internal_relocs;
6917 irelaend = irela + section->reloc_count;
6918 for (; irela < irelaend; irela++)
6919 {
6920 enum elf_ppc64_reloc_type r_type;
6921 unsigned int r_indx;
6922 enum ppc_stub_type stub_type;
6923 struct ppc_stub_hash_entry *stub_entry;
6924 asection *sym_sec;
6925 bfd_vma sym_value;
6926 bfd_vma destination;
6927 struct ppc_link_hash_entry *hash;
6928 struct elf_link_hash_entry *h;
6929 Elf_Internal_Sym *sym;
6930 char *stub_name;
6931 const asection *id_sec;
6932
6933 r_type = ELF64_R_TYPE (irela->r_info);
6934 r_indx = ELF64_R_SYM (irela->r_info);
6935
6936 if (r_type >= R_PPC64_max)
6937 {
6938 bfd_set_error (bfd_error_bad_value);
6939 goto error_ret_free_internal;
6940 }
6941
6942 /* Only look for stubs on branch instructions. */
6943 if (r_type != R_PPC64_REL24
6944 && r_type != R_PPC64_REL14
6945 && r_type != R_PPC64_REL14_BRTAKEN
6946 && r_type != R_PPC64_REL14_BRNTAKEN)
6947 continue;
6948
6949 /* Now determine the call target, its name, value,
6950 section. */
6951 destination = 0;
6952 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6953 r_indx, input_bfd))
6954 goto error_ret_free_internal;
6955 hash = (struct ppc_link_hash_entry *) h;
6956
6957 if (hash == NULL)
6958 {
6959 /* It's a local symbol. */
6960 sym_value = sym->st_value;
6961 destination = (sym_value + irela->r_addend
6962 + sym_sec->output_offset
6963 + sym_sec->output_section->vma);
6964 }
6965 else
6966 {
6967 /* It's an external symbol. */
6968 sym_value = 0;
6969 if (hash->elf.root.type == bfd_link_hash_defined
6970 || hash->elf.root.type == bfd_link_hash_defweak)
6971 {
6972 sym_value = hash->elf.root.u.def.value;
6973 if (sym_sec->output_section != NULL)
6974 destination = (sym_value + irela->r_addend
6975 + sym_sec->output_offset
6976 + sym_sec->output_section->vma);
6977 }
6978 else if (hash->elf.root.type == bfd_link_hash_undefweak)
6979 ;
6980 else if (hash->elf.root.type == bfd_link_hash_undefined)
6981 ;
6982 else
6983 {
6984 bfd_set_error (bfd_error_bad_value);
6985 goto error_ret_free_internal;
6986 }
6987 }
6988
6989 /* Determine what (if any) linker stub is needed. */
6990 stub_type = ppc_type_of_stub (section, irela, &hash,
6991 destination);
6992
6993 if (stub_type != ppc_stub_plt_call)
6994 {
6995 /* Check whether we need a TOC adjusting stub.
6996 Since the linker pastes together pieces from
6997 different object files when creating the
6998 _init and _fini functions, it may be that a
6999 call to what looks like a local sym is in
7000 fact a call needing a TOC adjustment. */
7001 if (sym_sec != NULL
7002 && sym_sec->output_section != NULL
7003 && (htab->stub_group[sym_sec->id].toc_off
7004 != htab->stub_group[section->id].toc_off)
7005 && sym_sec->has_gp_reloc
7006 && section->has_gp_reloc)
7007 stub_type = ppc_stub_long_branch_r2off;
7008 }
7009
7010 if (stub_type == ppc_stub_none)
7011 continue;
7012
7013 /* __tls_get_addr calls might be eliminated. */
7014 if (stub_type != ppc_stub_plt_call
7015 && hash != NULL
7016 && &hash->elf == htab->tls_get_addr
7017 && section->has_tls_reloc
7018 && irela != internal_relocs)
7019 {
7020 /* Get tls info. */
7021 char *tls_mask;
7022
7023 if (!get_tls_mask (&tls_mask, NULL, &local_syms,
7024 irela - 1, input_bfd))
7025 goto error_ret_free_internal;
7026 if (*tls_mask != 0)
7027 continue;
7028 }
7029
7030 /* Support for grouping stub sections. */
7031 id_sec = htab->stub_group[section->id].link_sec;
7032
7033 /* Get the name of this stub. */
7034 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
7035 if (!stub_name)
7036 goto error_ret_free_internal;
7037
7038 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
7039 stub_name, FALSE, FALSE);
7040 if (stub_entry != NULL)
7041 {
7042 /* The proper stub has already been created. */
7043 free (stub_name);
7044 continue;
7045 }
7046
7047 stub_entry = ppc_add_stub (stub_name, section, htab);
7048 if (stub_entry == NULL)
7049 {
7050 free (stub_name);
7051 error_ret_free_internal:
7052 if (elf_section_data (section)->relocs == NULL)
7053 free (internal_relocs);
7054 error_ret_free_local:
7055 if (local_syms != NULL
7056 && (symtab_hdr->contents
7057 != (unsigned char *) local_syms))
7058 free (local_syms);
7059 return FALSE;
7060 }
7061
7062 stub_entry->stub_type = stub_type;
7063 stub_entry->target_value = sym_value;
7064 stub_entry->target_section = sym_sec;
7065 stub_entry->h = hash;
7066 stub_entry->addend = irela->r_addend;
7067 stub_changed = TRUE;
7068 }
7069
7070 /* We're done with the internal relocs, free them. */
7071 if (elf_section_data (section)->relocs != internal_relocs)
7072 free (internal_relocs);
7073 }
7074
7075 if (local_syms != NULL
7076 && symtab_hdr->contents != (unsigned char *) local_syms)
7077 {
7078 if (!info->keep_memory)
7079 free (local_syms);
7080 else
7081 symtab_hdr->contents = (unsigned char *) local_syms;
7082 }
7083 }
7084
7085 if (!stub_changed)
7086 break;
7087
7088 /* OK, we've added some stubs. Find out the new size of the
7089 stub sections. */
7090 for (stub_sec = htab->stub_bfd->sections;
7091 stub_sec != NULL;
7092 stub_sec = stub_sec->next)
7093 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
7094 {
7095 stub_sec->_raw_size = 0;
7096 stub_sec->_cooked_size = 0;
7097 }
7098 htab->brlt->_raw_size = 0;
7099 htab->brlt->_cooked_size = 0;
7100 if (info->shared)
7101 {
7102 htab->relbrlt->_raw_size = 0;
7103 htab->relbrlt->_cooked_size = 0;
7104 }
7105
7106 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
7107
7108 /* Ask the linker to do its stuff. */
7109 (*htab->layout_sections_again) ();
7110 }
7111
7112 /* It would be nice to strip .branch_lt from the output if the
7113 section is empty, but it's too late. If we strip sections here,
7114 the dynamic symbol table is corrupted since the section symbol
7115 for the stripped section isn't written. */
7116
7117 return TRUE;
7118 }
7119
7120 /* Called after we have determined section placement. If sections
7121 move, we'll be called again. Provide a value for TOCstart. */
7122
7123 bfd_vma
ppc64_elf_toc(bfd * obfd)7124 ppc64_elf_toc (bfd *obfd)
7125 {
7126 asection *s;
7127 bfd_vma TOCstart;
7128
7129 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
7130 order. The TOC starts where the first of these sections starts. */
7131 s = bfd_get_section_by_name (obfd, ".got");
7132 if (s == NULL)
7133 s = bfd_get_section_by_name (obfd, ".toc");
7134 if (s == NULL)
7135 s = bfd_get_section_by_name (obfd, ".tocbss");
7136 if (s == NULL)
7137 s = bfd_get_section_by_name (obfd, ".plt");
7138 if (s == NULL)
7139 {
7140 /* This may happen for
7141 o references to TOC base (SYM@toc / TOC[tc0]) without a
7142 .toc directive
7143 o bad linker script
7144 o --gc-sections and empty TOC sections
7145
7146 FIXME: Warn user? */
7147
7148 /* Look for a likely section. We probably won't even be
7149 using TOCstart. */
7150 for (s = obfd->sections; s != NULL; s = s->next)
7151 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
7152 == (SEC_ALLOC | SEC_SMALL_DATA))
7153 break;
7154 if (s == NULL)
7155 for (s = obfd->sections; s != NULL; s = s->next)
7156 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
7157 == (SEC_ALLOC | SEC_SMALL_DATA))
7158 break;
7159 if (s == NULL)
7160 for (s = obfd->sections; s != NULL; s = s->next)
7161 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
7162 break;
7163 if (s == NULL)
7164 for (s = obfd->sections; s != NULL; s = s->next)
7165 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
7166 break;
7167 }
7168
7169 TOCstart = 0;
7170 if (s != NULL)
7171 TOCstart = s->output_section->vma + s->output_offset;
7172
7173 return TOCstart;
7174 }
7175
7176 /* Build all the stubs associated with the current output file.
7177 The stubs are kept in a hash table attached to the main linker
7178 hash table. This function is called via gldelf64ppc_finish. */
7179
7180 bfd_boolean
ppc64_elf_build_stubs(bfd_boolean emit_stub_syms,struct bfd_link_info * info,char ** stats)7181 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
7182 struct bfd_link_info *info,
7183 char **stats)
7184 {
7185 struct ppc_link_hash_table *htab = ppc_hash_table (info);
7186 asection *stub_sec;
7187 bfd_byte *p;
7188 int stub_sec_count = 0;
7189
7190 htab->emit_stub_syms = emit_stub_syms;
7191 for (stub_sec = htab->stub_bfd->sections;
7192 stub_sec != NULL;
7193 stub_sec = stub_sec->next)
7194 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
7195 {
7196 bfd_size_type size;
7197
7198 /* Allocate memory to hold the linker stubs. */
7199 size = stub_sec->_raw_size;
7200 if (size != 0)
7201 {
7202 stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
7203 if (stub_sec->contents == NULL)
7204 return FALSE;
7205 }
7206 stub_sec->_cooked_size = 0;
7207 }
7208
7209 if (htab->plt != NULL)
7210 {
7211 unsigned int indx;
7212 bfd_vma plt0;
7213
7214 /* Build the .glink plt call stub. */
7215 plt0 = (htab->plt->output_section->vma
7216 + htab->plt->output_offset
7217 - (htab->glink->output_section->vma
7218 + htab->glink->output_offset
7219 + GLINK_CALL_STUB_SIZE));
7220 if (plt0 + 0x80008000 > 0xffffffff)
7221 {
7222 (*_bfd_error_handler) (_(".glink and .plt too far apart"));
7223 bfd_set_error (bfd_error_bad_value);
7224 return FALSE;
7225 }
7226
7227 if (htab->emit_stub_syms)
7228 {
7229 struct elf_link_hash_entry *h;
7230 h = elf_link_hash_lookup (&htab->elf, "__glink", TRUE, FALSE, FALSE);
7231 if (h == NULL)
7232 return FALSE;
7233 if (h->root.type == bfd_link_hash_new)
7234 {
7235 h->root.type = bfd_link_hash_defined;
7236 h->root.u.def.section = htab->glink;
7237 h->root.u.def.value = 0;
7238 h->elf_link_hash_flags = (ELF_LINK_HASH_REF_REGULAR
7239 | ELF_LINK_HASH_DEF_REGULAR
7240 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
7241 | ELF_LINK_FORCED_LOCAL);
7242 }
7243 }
7244 p = htab->glink->contents;
7245 bfd_put_32 (htab->glink->owner, MFCTR_R12, p);
7246 p += 4;
7247 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_3, p);
7248 p += 4;
7249 bfd_put_32 (htab->glink->owner, ADDIC_R2_R0_32K, p);
7250 p += 4;
7251 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
7252 p += 4;
7253 bfd_put_32 (htab->glink->owner, SRADI_R2_R2_63, p);
7254 p += 4;
7255 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_2, p);
7256 p += 4;
7257 bfd_put_32 (htab->glink->owner, AND_R2_R2_R11, p);
7258 p += 4;
7259 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
7260 p += 4;
7261 bfd_put_32 (htab->glink->owner, ADD_R12_R12_R2, p);
7262 p += 4;
7263 bfd_put_32 (htab->glink->owner, ADDIS_R12_R12 | PPC_HA (plt0), p);
7264 p += 4;
7265 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | PPC_LO (plt0), p);
7266 p += 4;
7267 bfd_put_32 (htab->glink->owner, ADDI_R12_R12 | PPC_LO (plt0), p);
7268 p += 4;
7269 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
7270 p += 4;
7271 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
7272 p += 4;
7273 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
7274 p += 4;
7275 bfd_put_32 (htab->glink->owner, BCTR, p);
7276 p += 4;
7277
7278 /* Build the .glink lazy link call stubs. */
7279 indx = 0;
7280 while (p < htab->glink->contents + htab->glink->_raw_size)
7281 {
7282 if (indx < 0x8000)
7283 {
7284 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
7285 p += 4;
7286 }
7287 else
7288 {
7289 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
7290 p += 4;
7291 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
7292 p += 4;
7293 }
7294 bfd_put_32 (htab->glink->owner,
7295 B_DOT | ((htab->glink->contents - p) & 0x3fffffc), p);
7296 indx++;
7297 p += 4;
7298 }
7299 htab->glink->_cooked_size = p - htab->glink->contents;
7300 }
7301
7302 if (htab->brlt->_raw_size != 0)
7303 {
7304 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
7305 htab->brlt->_raw_size);
7306 if (htab->brlt->contents == NULL)
7307 return FALSE;
7308 }
7309 if (info->shared && htab->relbrlt->_raw_size != 0)
7310 {
7311 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
7312 htab->relbrlt->_raw_size);
7313 if (htab->relbrlt->contents == NULL)
7314 return FALSE;
7315 }
7316
7317 /* Build the stubs as directed by the stub hash table. */
7318 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
7319
7320 for (stub_sec = htab->stub_bfd->sections;
7321 stub_sec != NULL;
7322 stub_sec = stub_sec->next)
7323 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
7324 {
7325 stub_sec_count += 1;
7326 if (stub_sec->_raw_size != stub_sec->_cooked_size)
7327 break;
7328 }
7329
7330 if (stub_sec != NULL
7331 || htab->glink->_raw_size != htab->glink->_cooked_size)
7332 {
7333 htab->stub_error = TRUE;
7334 (*_bfd_error_handler) (_("stubs don't match calculated size"));
7335 }
7336
7337 if (htab->stub_error)
7338 return FALSE;
7339
7340 if (stats != NULL)
7341 {
7342 *stats = bfd_malloc (500);
7343 if (*stats == NULL)
7344 return FALSE;
7345
7346 sprintf (*stats, _("linker stubs in %u groups\n"
7347 " branch %lu\n"
7348 " toc adjust %lu\n"
7349 " long branch %lu\n"
7350 " long toc adj %lu\n"
7351 " plt call %lu"),
7352 stub_sec_count,
7353 htab->stub_count[ppc_stub_long_branch - 1],
7354 htab->stub_count[ppc_stub_long_branch_r2off - 1],
7355 htab->stub_count[ppc_stub_plt_branch - 1],
7356 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
7357 htab->stub_count[ppc_stub_plt_call - 1]);
7358 }
7359 return TRUE;
7360 }
7361
7362 /* The RELOCATE_SECTION function is called by the ELF backend linker
7363 to handle the relocations for a section.
7364
7365 The relocs are always passed as Rela structures; if the section
7366 actually uses Rel structures, the r_addend field will always be
7367 zero.
7368
7369 This function is responsible for adjust the section contents as
7370 necessary, and (if using Rela relocs and generating a
7371 relocatable output file) adjusting the reloc addend as
7372 necessary.
7373
7374 This function does not have to worry about setting the reloc
7375 address or the reloc symbol index.
7376
7377 LOCAL_SYMS is a pointer to the swapped in local symbols.
7378
7379 LOCAL_SECTIONS is an array giving the section in the input file
7380 corresponding to the st_shndx field of each local symbol.
7381
7382 The global hash table entry for the global symbols can be found
7383 via elf_sym_hashes (input_bfd).
7384
7385 When generating relocatable output, this function must handle
7386 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7387 going to be the section symbol corresponding to the output
7388 section, which means that the addend must be adjusted
7389 accordingly. */
7390
7391 static bfd_boolean
ppc64_elf_relocate_section(bfd * output_bfd,struct bfd_link_info * info,bfd * input_bfd,asection * input_section,bfd_byte * contents,Elf_Internal_Rela * relocs,Elf_Internal_Sym * local_syms,asection ** local_sections)7392 ppc64_elf_relocate_section (bfd *output_bfd,
7393 struct bfd_link_info *info,
7394 bfd *input_bfd,
7395 asection *input_section,
7396 bfd_byte *contents,
7397 Elf_Internal_Rela *relocs,
7398 Elf_Internal_Sym *local_syms,
7399 asection **local_sections)
7400 {
7401 struct ppc_link_hash_table *htab;
7402 Elf_Internal_Shdr *symtab_hdr;
7403 struct elf_link_hash_entry **sym_hashes;
7404 Elf_Internal_Rela *rel;
7405 Elf_Internal_Rela *relend;
7406 Elf_Internal_Rela outrel;
7407 bfd_byte *loc;
7408 struct got_entry **local_got_ents;
7409 bfd_vma TOCstart;
7410 bfd_boolean ret = TRUE;
7411 bfd_boolean is_opd;
7412 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
7413 bfd_boolean is_power4 = FALSE;
7414
7415 if (info->relocatable)
7416 return TRUE;
7417
7418 /* Initialize howto table if needed. */
7419 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
7420 ppc_howto_init ();
7421
7422 htab = ppc_hash_table (info);
7423 local_got_ents = elf_local_got_ents (input_bfd);
7424 TOCstart = elf_gp (output_bfd);
7425 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
7426 sym_hashes = elf_sym_hashes (input_bfd);
7427 is_opd = ppc64_elf_section_data (input_section)->opd.adjust != NULL;
7428
7429 rel = relocs;
7430 relend = relocs + input_section->reloc_count;
7431 for (; rel < relend; rel++)
7432 {
7433 enum elf_ppc64_reloc_type r_type;
7434 bfd_vma addend;
7435 bfd_reloc_status_type r;
7436 Elf_Internal_Sym *sym;
7437 asection *sec;
7438 struct elf_link_hash_entry *h;
7439 struct elf_link_hash_entry *fdh;
7440 const char *sym_name;
7441 unsigned long r_symndx, toc_symndx;
7442 char tls_mask, tls_gd, tls_type;
7443 char sym_type;
7444 bfd_vma relocation;
7445 bfd_boolean unresolved_reloc;
7446 bfd_boolean warned;
7447 unsigned long insn, mask;
7448 struct ppc_stub_hash_entry *stub_entry;
7449 bfd_vma max_br_offset;
7450 bfd_vma from;
7451
7452 r_type = ELF64_R_TYPE (rel->r_info);
7453 r_symndx = ELF64_R_SYM (rel->r_info);
7454
7455 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
7456 symbol of the previous ADDR64 reloc. The symbol gives us the
7457 proper TOC base to use. */
7458 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
7459 && rel != relocs
7460 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
7461 && is_opd)
7462 r_symndx = ELF64_R_SYM (rel[-1].r_info);
7463
7464 sym = NULL;
7465 sec = NULL;
7466 h = NULL;
7467 sym_name = NULL;
7468 unresolved_reloc = FALSE;
7469 warned = FALSE;
7470
7471 if (r_symndx < symtab_hdr->sh_info)
7472 {
7473 /* It's a local symbol. */
7474 sym = local_syms + r_symndx;
7475 sec = local_sections[r_symndx];
7476 sym_name = bfd_elf_local_sym_name (input_bfd, sym);
7477 sym_type = ELF64_ST_TYPE (sym->st_info);
7478 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7479 if (elf_section_data (sec) != NULL)
7480 {
7481 long *opd_sym_adjust;
7482
7483 opd_sym_adjust = ppc64_elf_section_data (sec)->opd.adjust;
7484 if (opd_sym_adjust != NULL)
7485 relocation += opd_sym_adjust[sym->st_value / 24];
7486 }
7487 }
7488 else
7489 {
7490 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
7491 r_symndx, symtab_hdr, sym_hashes,
7492 h, sec, relocation,
7493 unresolved_reloc, warned);
7494 sym_name = h->root.root.string;
7495 sym_type = h->type;
7496 }
7497
7498 /* TLS optimizations. Replace instruction sequences and relocs
7499 based on information we collected in tls_optimize. We edit
7500 RELOCS so that --emit-relocs will output something sensible
7501 for the final instruction stream. */
7502 tls_mask = 0;
7503 tls_gd = 0;
7504 toc_symndx = 0;
7505 if (IS_PPC64_TLS_RELOC (r_type))
7506 {
7507 if (h != NULL)
7508 tls_mask = ((struct ppc_link_hash_entry *) h)->tls_mask;
7509 else if (local_got_ents != NULL)
7510 {
7511 char *lgot_masks;
7512 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
7513 tls_mask = lgot_masks[r_symndx];
7514 }
7515 if (tls_mask == 0 && r_type == R_PPC64_TLS)
7516 {
7517 /* Check for toc tls entries. */
7518 char *toc_tls;
7519
7520 if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
7521 rel, input_bfd))
7522 return FALSE;
7523
7524 if (toc_tls)
7525 tls_mask = *toc_tls;
7526 }
7527 }
7528
7529 /* Check that tls relocs are used with tls syms, and non-tls
7530 relocs are used with non-tls syms. */
7531 if (r_symndx != 0
7532 && r_type != R_PPC64_NONE
7533 && (h == NULL
7534 || h->root.type == bfd_link_hash_defined
7535 || h->root.type == bfd_link_hash_defweak)
7536 && IS_PPC64_TLS_RELOC (r_type) != (sym_type == STT_TLS))
7537 {
7538 if (r_type == R_PPC64_TLS && tls_mask != 0)
7539 /* R_PPC64_TLS is OK against a symbol in the TOC. */
7540 ;
7541 else
7542 (*_bfd_error_handler)
7543 (sym_type == STT_TLS
7544 ? _("%s(%s+0x%lx): %s used with TLS symbol %s")
7545 : _("%s(%s+0x%lx): %s used with non-TLS symbol %s"),
7546 bfd_archive_filename (input_bfd),
7547 input_section->name,
7548 (long) rel->r_offset,
7549 ppc64_elf_howto_table[r_type]->name,
7550 sym_name);
7551 }
7552
7553 /* Ensure reloc mapping code below stays sane. */
7554 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
7555 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
7556 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
7557 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
7558 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
7559 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
7560 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
7561 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
7562 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
7563 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
7564 abort ();
7565
7566 switch (r_type)
7567 {
7568 default:
7569 break;
7570
7571 case R_PPC64_TOC16:
7572 case R_PPC64_TOC16_LO:
7573 case R_PPC64_TOC16_DS:
7574 case R_PPC64_TOC16_LO_DS:
7575 {
7576 /* Check for toc tls entries. */
7577 char *toc_tls;
7578 int retval;
7579
7580 retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
7581 rel, input_bfd);
7582 if (retval == 0)
7583 return FALSE;
7584
7585 if (toc_tls)
7586 {
7587 tls_mask = *toc_tls;
7588 if (r_type == R_PPC64_TOC16_DS
7589 || r_type == R_PPC64_TOC16_LO_DS)
7590 {
7591 if (tls_mask != 0
7592 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
7593 goto toctprel;
7594 }
7595 else
7596 {
7597 /* If we found a GD reloc pair, then we might be
7598 doing a GD->IE transition. */
7599 if (retval == 2)
7600 {
7601 tls_gd = TLS_TPRELGD;
7602 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
7603 goto tls_get_addr_check;
7604 }
7605 else if (retval == 3)
7606 {
7607 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
7608 goto tls_get_addr_check;
7609 }
7610 }
7611 }
7612 }
7613 break;
7614
7615 case R_PPC64_GOT_TPREL16_DS:
7616 case R_PPC64_GOT_TPREL16_LO_DS:
7617 if (tls_mask != 0
7618 && (tls_mask & TLS_TPREL) == 0)
7619 {
7620 toctprel:
7621 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
7622 insn &= 31 << 21;
7623 insn |= 0x3c0d0000; /* addis 0,13,0 */
7624 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
7625 r_type = R_PPC64_TPREL16_HA;
7626 if (toc_symndx != 0)
7627 {
7628 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
7629 /* We changed the symbol. Start over in order to
7630 get h, sym, sec etc. right. */
7631 rel--;
7632 continue;
7633 }
7634 else
7635 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7636 }
7637 break;
7638
7639 case R_PPC64_TLS:
7640 if (tls_mask != 0
7641 && (tls_mask & TLS_TPREL) == 0)
7642 {
7643 bfd_vma rtra;
7644 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7645 if ((insn & ((0x3f << 26) | (31 << 11)))
7646 == ((31 << 26) | (13 << 11)))
7647 rtra = insn & ((1 << 26) - (1 << 16));
7648 else if ((insn & ((0x3f << 26) | (31 << 16)))
7649 == ((31 << 26) | (13 << 16)))
7650 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
7651 else
7652 abort ();
7653 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
7654 /* add -> addi. */
7655 insn = 14 << 26;
7656 else if ((insn & (31 << 1)) == 23 << 1
7657 && ((insn & (31 << 6)) < 14 << 6
7658 || ((insn & (31 << 6)) >= 16 << 6
7659 && (insn & (31 << 6)) < 24 << 6)))
7660 /* load and store indexed -> dform. */
7661 insn = (32 | ((insn >> 6) & 31)) << 26;
7662 else if ((insn & (31 << 1)) == 21 << 1
7663 && (insn & (0x1a << 6)) == 0)
7664 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7665 insn = (((58 | ((insn >> 6) & 4)) << 26)
7666 | ((insn >> 6) & 1));
7667 else if ((insn & (31 << 1)) == 21 << 1
7668 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
7669 /* lwax -> lwa. */
7670 insn = (58 << 26) | 2;
7671 else
7672 abort ();
7673 insn |= rtra;
7674 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7675 /* Was PPC64_TLS which sits on insn boundary, now
7676 PPC64_TPREL16_LO which is at insn+2. */
7677 rel->r_offset += 2;
7678 r_type = R_PPC64_TPREL16_LO;
7679 if (toc_symndx != 0)
7680 {
7681 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
7682 /* We changed the symbol. Start over in order to
7683 get h, sym, sec etc. right. */
7684 rel--;
7685 continue;
7686 }
7687 else
7688 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7689 }
7690 break;
7691
7692 case R_PPC64_GOT_TLSGD16_HI:
7693 case R_PPC64_GOT_TLSGD16_HA:
7694 tls_gd = TLS_TPRELGD;
7695 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
7696 goto tls_gdld_hi;
7697 break;
7698
7699 case R_PPC64_GOT_TLSLD16_HI:
7700 case R_PPC64_GOT_TLSLD16_HA:
7701 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
7702 {
7703 tls_gdld_hi:
7704 if ((tls_mask & tls_gd) != 0)
7705 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
7706 + R_PPC64_GOT_TPREL16_DS);
7707 else
7708 {
7709 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
7710 rel->r_offset -= 2;
7711 r_type = R_PPC64_NONE;
7712 }
7713 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7714 }
7715 break;
7716
7717 case R_PPC64_GOT_TLSGD16:
7718 case R_PPC64_GOT_TLSGD16_LO:
7719 tls_gd = TLS_TPRELGD;
7720 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
7721 goto tls_get_addr_check;
7722 break;
7723
7724 case R_PPC64_GOT_TLSLD16:
7725 case R_PPC64_GOT_TLSLD16_LO:
7726 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
7727 {
7728 tls_get_addr_check:
7729 if (rel + 1 < relend)
7730 {
7731 enum elf_ppc64_reloc_type r_type2;
7732 unsigned long r_symndx2;
7733 struct elf_link_hash_entry *h2;
7734 bfd_vma insn1, insn2, insn3;
7735 bfd_vma offset;
7736
7737 /* The next instruction should be a call to
7738 __tls_get_addr. Peek at the reloc to be sure. */
7739 r_type2 = ELF64_R_TYPE (rel[1].r_info);
7740 r_symndx2 = ELF64_R_SYM (rel[1].r_info);
7741 if (r_symndx2 < symtab_hdr->sh_info
7742 || (r_type2 != R_PPC64_REL14
7743 && r_type2 != R_PPC64_REL14_BRTAKEN
7744 && r_type2 != R_PPC64_REL14_BRNTAKEN
7745 && r_type2 != R_PPC64_REL24))
7746 break;
7747
7748 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
7749 while (h2->root.type == bfd_link_hash_indirect
7750 || h2->root.type == bfd_link_hash_warning)
7751 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
7752 if (h2 == NULL || h2 != htab->tls_get_addr)
7753 break;
7754
7755 /* OK, it checks out. Replace the call. */
7756 offset = rel[1].r_offset;
7757 insn1 = bfd_get_32 (output_bfd,
7758 contents + rel->r_offset - 2);
7759 insn3 = bfd_get_32 (output_bfd,
7760 contents + offset + 4);
7761 if ((tls_mask & tls_gd) != 0)
7762 {
7763 /* IE */
7764 insn1 &= (1 << 26) - (1 << 2);
7765 insn1 |= 58 << 26; /* ld */
7766 insn2 = 0x7c636a14; /* add 3,3,13 */
7767 rel[1].r_info = ELF64_R_INFO (r_symndx2, R_PPC64_NONE);
7768 if ((tls_mask & TLS_EXPLICIT) == 0)
7769 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
7770 + R_PPC64_GOT_TPREL16_DS);
7771 else
7772 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
7773 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7774 }
7775 else
7776 {
7777 /* LE */
7778 insn1 = 0x3c6d0000; /* addis 3,13,0 */
7779 insn2 = 0x38630000; /* addi 3,3,0 */
7780 if (tls_gd == 0)
7781 {
7782 /* Was an LD reloc. */
7783 r_symndx = 0;
7784 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7785 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7786 }
7787 else if (toc_symndx != 0)
7788 r_symndx = toc_symndx;
7789 r_type = R_PPC64_TPREL16_HA;
7790 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7791 rel[1].r_info = ELF64_R_INFO (r_symndx,
7792 R_PPC64_TPREL16_LO);
7793 rel[1].r_offset += 2;
7794 }
7795 if (insn3 == NOP
7796 || insn3 == CROR_151515 || insn3 == CROR_313131)
7797 {
7798 insn3 = insn2;
7799 insn2 = NOP;
7800 rel[1].r_offset += 4;
7801 }
7802 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
7803 bfd_put_32 (output_bfd, insn2, contents + offset);
7804 bfd_put_32 (output_bfd, insn3, contents + offset + 4);
7805 if (tls_gd == 0 || toc_symndx != 0)
7806 {
7807 /* We changed the symbol. Start over in order
7808 to get h, sym, sec etc. right. */
7809 rel--;
7810 continue;
7811 }
7812 }
7813 }
7814 break;
7815
7816 case R_PPC64_DTPMOD64:
7817 if (rel + 1 < relend
7818 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
7819 && rel[1].r_offset == rel->r_offset + 8)
7820 {
7821 if ((tls_mask & TLS_GD) == 0)
7822 {
7823 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
7824 if ((tls_mask & TLS_TPRELGD) != 0)
7825 r_type = R_PPC64_TPREL64;
7826 else
7827 {
7828 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
7829 r_type = R_PPC64_NONE;
7830 }
7831 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7832 }
7833 }
7834 else
7835 {
7836 if ((tls_mask & TLS_LD) == 0)
7837 {
7838 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
7839 r_type = R_PPC64_NONE;
7840 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7841 }
7842 }
7843 break;
7844
7845 case R_PPC64_TPREL64:
7846 if ((tls_mask & TLS_TPREL) == 0)
7847 {
7848 r_type = R_PPC64_NONE;
7849 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7850 }
7851 break;
7852 }
7853
7854 /* Handle other relocations that tweak non-addend part of insn. */
7855 insn = 0;
7856 switch (r_type)
7857 {
7858 default:
7859 break;
7860
7861 /* Branch taken prediction relocations. */
7862 case R_PPC64_ADDR14_BRTAKEN:
7863 case R_PPC64_REL14_BRTAKEN:
7864 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
7865 /* Fall thru. */
7866
7867 /* Branch not taken prediction relocations. */
7868 case R_PPC64_ADDR14_BRNTAKEN:
7869 case R_PPC64_REL14_BRNTAKEN:
7870 insn |= bfd_get_32 (output_bfd,
7871 contents + rel->r_offset) & ~(0x01 << 21);
7872 if (is_power4)
7873 {
7874 /* Set 'a' bit. This is 0b00010 in BO field for branch
7875 on CR(BI) insns (BO == 001at or 011at), and 0b01000
7876 for branch on CTR insns (BO == 1a00t or 1a01t). */
7877 if ((insn & (0x14 << 21)) == (0x04 << 21))
7878 insn |= 0x02 << 21;
7879 else if ((insn & (0x14 << 21)) == (0x10 << 21))
7880 insn |= 0x08 << 21;
7881 else
7882 break;
7883 }
7884 else
7885 {
7886 from = (rel->r_offset
7887 + input_section->output_offset
7888 + input_section->output_section->vma);
7889
7890 /* Invert 'y' bit if not the default. */
7891 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
7892 insn ^= 0x01 << 21;
7893 }
7894
7895 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7896 break;
7897
7898 case R_PPC64_REL24:
7899 /* Calls to functions with a different TOC, such as calls to
7900 shared objects, need to alter the TOC pointer. This is
7901 done using a linkage stub. A REL24 branching to these
7902 linkage stubs needs to be followed by a nop, as the nop
7903 will be replaced with an instruction to restore the TOC
7904 base pointer. */
7905 if (((h != NULL
7906 && (fdh = ((struct ppc_link_hash_entry *) h)->oh) != NULL
7907 && fdh->plt.plist != NULL)
7908 || ((fdh = h, sec) != NULL
7909 && sec->output_section != NULL
7910 && (htab->stub_group[sec->id].toc_off
7911 != htab->stub_group[input_section->id].toc_off)))
7912 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
7913 rel, htab)) != NULL
7914 && (stub_entry->stub_type == ppc_stub_plt_call
7915 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
7916 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
7917 {
7918 bfd_boolean can_plt_call = 0;
7919
7920 if (rel->r_offset + 8 <= input_section->_cooked_size)
7921 {
7922 insn = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
7923 if (insn == NOP
7924 || insn == CROR_151515 || insn == CROR_313131)
7925 {
7926 bfd_put_32 (input_bfd, LD_R2_40R1,
7927 contents + rel->r_offset + 4);
7928 can_plt_call = 1;
7929 }
7930 }
7931
7932 if (!can_plt_call)
7933 {
7934 if (stub_entry->stub_type == ppc_stub_plt_call)
7935 {
7936 /* If this is a plain branch rather than a branch
7937 and link, don't require a nop. */
7938 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
7939 if ((insn & 1) == 0)
7940 can_plt_call = 1;
7941 }
7942 else if (h != NULL
7943 && strcmp (h->root.root.string,
7944 ".__libc_start_main") == 0)
7945 {
7946 /* Allow crt1 branch to go via a toc adjusting stub. */
7947 can_plt_call = 1;
7948 }
7949 else
7950 {
7951 if (strcmp (input_section->output_section->name,
7952 ".init") == 0
7953 || strcmp (input_section->output_section->name,
7954 ".fini") == 0)
7955 (*_bfd_error_handler)
7956 (_("%s(%s+0x%lx): automatic multiple TOCs "
7957 "not supported using your crt files; "
7958 "recompile with -mminimal-toc or upgrade gcc"),
7959 bfd_archive_filename (input_bfd),
7960 input_section->name,
7961 (long) rel->r_offset);
7962 else
7963 (*_bfd_error_handler)
7964 (_("%s(%s+0x%lx): sibling call optimization to `%s' "
7965 "does not allow automatic multiple TOCs; "
7966 "recompile with -mminimal-toc or "
7967 "-fno-optimize-sibling-calls, "
7968 "or make `%s' extern"),
7969 bfd_archive_filename (input_bfd),
7970 input_section->name,
7971 (long) rel->r_offset,
7972 sym_name,
7973 sym_name);
7974 bfd_set_error (bfd_error_bad_value);
7975 ret = FALSE;
7976 }
7977 }
7978
7979 if (can_plt_call)
7980 {
7981 relocation = (stub_entry->stub_offset
7982 + stub_entry->stub_sec->output_offset
7983 + stub_entry->stub_sec->output_section->vma);
7984 if (stub_entry->stub_type == ppc_stub_plt_call)
7985 unresolved_reloc = FALSE;
7986 }
7987 }
7988
7989 if (h != NULL
7990 && h->root.type == bfd_link_hash_undefweak
7991 && relocation == 0
7992 && rel->r_addend == 0)
7993 {
7994 /* Tweak calls to undefined weak functions to point at a
7995 blr. We can thus call a weak function without first
7996 checking whether the function is defined. We have a
7997 blr at the end of .sfpr. */
7998 BFD_ASSERT (htab->sfpr->_raw_size != 0);
7999 relocation = (htab->sfpr->_raw_size - 4
8000 + htab->sfpr->output_offset
8001 + htab->sfpr->output_section->vma);
8002 from = (rel->r_offset
8003 + input_section->output_offset
8004 + input_section->output_section->vma);
8005
8006 /* But let's not be silly about it. If the blr isn't in
8007 reach, just go to the next instruction. */
8008 if (relocation - from + (1 << 25) >= (1 << 26)
8009 || htab->sfpr->_raw_size == 0)
8010 relocation = from + 4;
8011 }
8012 break;
8013 }
8014
8015 /* Set `addend'. */
8016 tls_type = 0;
8017 addend = rel->r_addend;
8018 switch (r_type)
8019 {
8020 default:
8021 (*_bfd_error_handler)
8022 (_("%s: unknown relocation type %d for symbol %s"),
8023 bfd_archive_filename (input_bfd), (int) r_type, sym_name);
8024
8025 bfd_set_error (bfd_error_bad_value);
8026 ret = FALSE;
8027 continue;
8028
8029 case R_PPC64_NONE:
8030 case R_PPC64_TLS:
8031 case R_PPC64_GNU_VTINHERIT:
8032 case R_PPC64_GNU_VTENTRY:
8033 continue;
8034
8035 /* GOT16 relocations. Like an ADDR16 using the symbol's
8036 address in the GOT as relocation value instead of the
8037 symbol's value itself. Also, create a GOT entry for the
8038 symbol and put the symbol value there. */
8039 case R_PPC64_GOT_TLSGD16:
8040 case R_PPC64_GOT_TLSGD16_LO:
8041 case R_PPC64_GOT_TLSGD16_HI:
8042 case R_PPC64_GOT_TLSGD16_HA:
8043 tls_type = TLS_TLS | TLS_GD;
8044 goto dogot;
8045
8046 case R_PPC64_GOT_TLSLD16:
8047 case R_PPC64_GOT_TLSLD16_LO:
8048 case R_PPC64_GOT_TLSLD16_HI:
8049 case R_PPC64_GOT_TLSLD16_HA:
8050 tls_type = TLS_TLS | TLS_LD;
8051 goto dogot;
8052
8053 case R_PPC64_GOT_TPREL16_DS:
8054 case R_PPC64_GOT_TPREL16_LO_DS:
8055 case R_PPC64_GOT_TPREL16_HI:
8056 case R_PPC64_GOT_TPREL16_HA:
8057 tls_type = TLS_TLS | TLS_TPREL;
8058 goto dogot;
8059
8060 case R_PPC64_GOT_DTPREL16_DS:
8061 case R_PPC64_GOT_DTPREL16_LO_DS:
8062 case R_PPC64_GOT_DTPREL16_HI:
8063 case R_PPC64_GOT_DTPREL16_HA:
8064 tls_type = TLS_TLS | TLS_DTPREL;
8065 goto dogot;
8066
8067 case R_PPC64_GOT16:
8068 case R_PPC64_GOT16_LO:
8069 case R_PPC64_GOT16_HI:
8070 case R_PPC64_GOT16_HA:
8071 case R_PPC64_GOT16_DS:
8072 case R_PPC64_GOT16_LO_DS:
8073 dogot:
8074 {
8075 /* Relocation is to the entry for this symbol in the global
8076 offset table. */
8077 asection *got;
8078 bfd_vma *offp;
8079 bfd_vma off;
8080 unsigned long indx = 0;
8081
8082 if (tls_type == (TLS_TLS | TLS_LD)
8083 && (h == NULL
8084 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)))
8085 offp = &ppc64_tlsld_got (input_bfd)->offset;
8086 else
8087 {
8088 struct got_entry *ent;
8089
8090 if (h != NULL)
8091 {
8092 bfd_boolean dyn = htab->elf.dynamic_sections_created;
8093 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
8094 || (info->shared
8095 && SYMBOL_REFERENCES_LOCAL (info, h)))
8096 /* This is actually a static link, or it is a
8097 -Bsymbolic link and the symbol is defined
8098 locally, or the symbol was forced to be local
8099 because of a version file. */
8100 ;
8101 else
8102 {
8103 indx = h->dynindx;
8104 unresolved_reloc = FALSE;
8105 }
8106 ent = h->got.glist;
8107 }
8108 else
8109 {
8110 if (local_got_ents == NULL)
8111 abort ();
8112 ent = local_got_ents[r_symndx];
8113 }
8114
8115 for (; ent != NULL; ent = ent->next)
8116 if (ent->addend == rel->r_addend
8117 && ent->owner == input_bfd
8118 && ent->tls_type == tls_type)
8119 break;
8120 if (ent == NULL)
8121 abort ();
8122 offp = &ent->got.offset;
8123 }
8124
8125 got = ppc64_elf_tdata (input_bfd)->got;
8126 if (got == NULL)
8127 abort ();
8128
8129 /* The offset must always be a multiple of 8. We use the
8130 least significant bit to record whether we have already
8131 processed this entry. */
8132 off = *offp;
8133 if ((off & 1) != 0)
8134 off &= ~1;
8135 else
8136 {
8137 /* Generate relocs for the dynamic linker, except in
8138 the case of TLSLD where we'll use one entry per
8139 module. */
8140 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
8141
8142 *offp = off | 1;
8143 if ((info->shared || indx != 0)
8144 && (h == NULL
8145 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8146 || h->root.type != bfd_link_hash_undefweak))
8147 {
8148 outrel.r_offset = (got->output_section->vma
8149 + got->output_offset
8150 + off);
8151 outrel.r_addend = rel->r_addend;
8152 if (tls_type & (TLS_LD | TLS_GD))
8153 {
8154 outrel.r_addend = 0;
8155 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
8156 if (tls_type == (TLS_TLS | TLS_GD))
8157 {
8158 loc = relgot->contents;
8159 loc += (relgot->reloc_count++
8160 * sizeof (Elf64_External_Rela));
8161 bfd_elf64_swap_reloca_out (output_bfd,
8162 &outrel, loc);
8163 outrel.r_offset += 8;
8164 outrel.r_addend = rel->r_addend;
8165 outrel.r_info
8166 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
8167 }
8168 }
8169 else if (tls_type == (TLS_TLS | TLS_DTPREL))
8170 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
8171 else if (tls_type == (TLS_TLS | TLS_TPREL))
8172 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
8173 else if (indx == 0)
8174 {
8175 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
8176
8177 /* Write the .got section contents for the sake
8178 of prelink. */
8179 loc = got->contents + off;
8180 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
8181 loc);
8182 }
8183 else
8184 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
8185
8186 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
8187 {
8188 outrel.r_addend += relocation;
8189 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8190 outrel.r_addend -= htab->elf.tls_sec->vma;
8191 }
8192 loc = relgot->contents;
8193 loc += (relgot->reloc_count++
8194 * sizeof (Elf64_External_Rela));
8195 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
8196 }
8197
8198 /* Init the .got section contents here if we're not
8199 emitting a reloc. */
8200 else
8201 {
8202 relocation += rel->r_addend;
8203 if (tls_type == (TLS_TLS | TLS_LD))
8204 relocation = 1;
8205 else if (tls_type != 0)
8206 {
8207 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
8208 if (tls_type == (TLS_TLS | TLS_TPREL))
8209 relocation += DTP_OFFSET - TP_OFFSET;
8210
8211 if (tls_type == (TLS_TLS | TLS_GD))
8212 {
8213 bfd_put_64 (output_bfd, relocation,
8214 got->contents + off + 8);
8215 relocation = 1;
8216 }
8217 }
8218
8219 bfd_put_64 (output_bfd, relocation,
8220 got->contents + off);
8221 }
8222 }
8223
8224 if (off >= (bfd_vma) -2)
8225 abort ();
8226
8227 relocation = got->output_offset + off;
8228
8229 /* TOC base (r2) is TOC start plus 0x8000. */
8230 addend = -TOC_BASE_OFF;
8231 }
8232 break;
8233
8234 case R_PPC64_PLT16_HA:
8235 case R_PPC64_PLT16_HI:
8236 case R_PPC64_PLT16_LO:
8237 case R_PPC64_PLT32:
8238 case R_PPC64_PLT64:
8239 /* Relocation is to the entry for this symbol in the
8240 procedure linkage table. */
8241
8242 /* Resolve a PLT reloc against a local symbol directly,
8243 without using the procedure linkage table. */
8244 if (h == NULL)
8245 break;
8246
8247 /* It's possible that we didn't make a PLT entry for this
8248 symbol. This happens when statically linking PIC code,
8249 or when using -Bsymbolic. Go find a match if there is a
8250 PLT entry. */
8251 if (htab->plt != NULL)
8252 {
8253 struct plt_entry *ent;
8254 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
8255 if (ent->addend == rel->r_addend
8256 && ent->plt.offset != (bfd_vma) -1)
8257 {
8258 relocation = (htab->plt->output_section->vma
8259 + htab->plt->output_offset
8260 + ent->plt.offset);
8261 unresolved_reloc = FALSE;
8262 }
8263 }
8264 break;
8265
8266 case R_PPC64_TOC:
8267 /* Relocation value is TOC base. */
8268 relocation = TOCstart;
8269 if (r_symndx == 0)
8270 relocation += htab->stub_group[input_section->id].toc_off;
8271 else if (unresolved_reloc)
8272 ;
8273 else if (sec != NULL && sec->id <= htab->top_id)
8274 relocation += htab->stub_group[sec->id].toc_off;
8275 else
8276 unresolved_reloc = TRUE;
8277 goto dodyn2;
8278
8279 /* TOC16 relocs. We want the offset relative to the TOC base,
8280 which is the address of the start of the TOC plus 0x8000.
8281 The TOC consists of sections .got, .toc, .tocbss, and .plt,
8282 in this order. */
8283 case R_PPC64_TOC16:
8284 case R_PPC64_TOC16_LO:
8285 case R_PPC64_TOC16_HI:
8286 case R_PPC64_TOC16_DS:
8287 case R_PPC64_TOC16_LO_DS:
8288 case R_PPC64_TOC16_HA:
8289 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
8290 break;
8291
8292 /* Relocate against the beginning of the section. */
8293 case R_PPC64_SECTOFF:
8294 case R_PPC64_SECTOFF_LO:
8295 case R_PPC64_SECTOFF_HI:
8296 case R_PPC64_SECTOFF_DS:
8297 case R_PPC64_SECTOFF_LO_DS:
8298 case R_PPC64_SECTOFF_HA:
8299 if (sec != NULL)
8300 addend -= sec->output_section->vma;
8301 break;
8302
8303 case R_PPC64_REL14:
8304 case R_PPC64_REL14_BRNTAKEN:
8305 case R_PPC64_REL14_BRTAKEN:
8306 case R_PPC64_REL24:
8307 break;
8308
8309 case R_PPC64_TPREL16:
8310 case R_PPC64_TPREL16_LO:
8311 case R_PPC64_TPREL16_HI:
8312 case R_PPC64_TPREL16_HA:
8313 case R_PPC64_TPREL16_DS:
8314 case R_PPC64_TPREL16_LO_DS:
8315 case R_PPC64_TPREL16_HIGHER:
8316 case R_PPC64_TPREL16_HIGHERA:
8317 case R_PPC64_TPREL16_HIGHEST:
8318 case R_PPC64_TPREL16_HIGHESTA:
8319 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8320 if (info->shared)
8321 /* The TPREL16 relocs shouldn't really be used in shared
8322 libs as they will result in DT_TEXTREL being set, but
8323 support them anyway. */
8324 goto dodyn;
8325 break;
8326
8327 case R_PPC64_DTPREL16:
8328 case R_PPC64_DTPREL16_LO:
8329 case R_PPC64_DTPREL16_HI:
8330 case R_PPC64_DTPREL16_HA:
8331 case R_PPC64_DTPREL16_DS:
8332 case R_PPC64_DTPREL16_LO_DS:
8333 case R_PPC64_DTPREL16_HIGHER:
8334 case R_PPC64_DTPREL16_HIGHERA:
8335 case R_PPC64_DTPREL16_HIGHEST:
8336 case R_PPC64_DTPREL16_HIGHESTA:
8337 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8338 break;
8339
8340 case R_PPC64_DTPMOD64:
8341 relocation = 1;
8342 addend = 0;
8343 goto dodyn;
8344
8345 case R_PPC64_TPREL64:
8346 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8347 goto dodyn;
8348
8349 case R_PPC64_DTPREL64:
8350 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8351 /* Fall thru */
8352
8353 /* Relocations that may need to be propagated if this is a
8354 dynamic object. */
8355 case R_PPC64_REL30:
8356 case R_PPC64_REL32:
8357 case R_PPC64_REL64:
8358 case R_PPC64_ADDR14:
8359 case R_PPC64_ADDR14_BRNTAKEN:
8360 case R_PPC64_ADDR14_BRTAKEN:
8361 case R_PPC64_ADDR16:
8362 case R_PPC64_ADDR16_DS:
8363 case R_PPC64_ADDR16_HA:
8364 case R_PPC64_ADDR16_HI:
8365 case R_PPC64_ADDR16_HIGHER:
8366 case R_PPC64_ADDR16_HIGHERA:
8367 case R_PPC64_ADDR16_HIGHEST:
8368 case R_PPC64_ADDR16_HIGHESTA:
8369 case R_PPC64_ADDR16_LO:
8370 case R_PPC64_ADDR16_LO_DS:
8371 case R_PPC64_ADDR24:
8372 case R_PPC64_ADDR32:
8373 case R_PPC64_ADDR64:
8374 case R_PPC64_UADDR16:
8375 case R_PPC64_UADDR32:
8376 case R_PPC64_UADDR64:
8377 /* r_symndx will be zero only for relocs against symbols
8378 from removed linkonce sections, or sections discarded by
8379 a linker script. */
8380 dodyn:
8381 if (r_symndx == 0)
8382 break;
8383 /* Fall thru. */
8384
8385 dodyn2:
8386 if ((input_section->flags & SEC_ALLOC) == 0)
8387 break;
8388
8389 if (NO_OPD_RELOCS && is_opd)
8390 break;
8391
8392 if ((info->shared
8393 && (h == NULL
8394 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8395 || h->root.type != bfd_link_hash_undefweak)
8396 && (MUST_BE_DYN_RELOC (r_type)
8397 || !SYMBOL_CALLS_LOCAL (info, h)))
8398 || (ELIMINATE_COPY_RELOCS
8399 && !info->shared
8400 && h != NULL
8401 && h->dynindx != -1
8402 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
8403 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
8404 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0))
8405 {
8406 Elf_Internal_Rela outrel;
8407 bfd_boolean skip, relocate;
8408 asection *sreloc;
8409 bfd_byte *loc;
8410 bfd_vma out_off;
8411
8412 /* When generating a dynamic object, these relocations
8413 are copied into the output file to be resolved at run
8414 time. */
8415
8416 skip = FALSE;
8417 relocate = FALSE;
8418
8419 out_off = _bfd_elf_section_offset (output_bfd, info,
8420 input_section, rel->r_offset);
8421 if (out_off == (bfd_vma) -1)
8422 skip = TRUE;
8423 else if (out_off == (bfd_vma) -2)
8424 skip = TRUE, relocate = TRUE;
8425 out_off += (input_section->output_section->vma
8426 + input_section->output_offset);
8427 outrel.r_offset = out_off;
8428 outrel.r_addend = rel->r_addend;
8429
8430 /* Optimize unaligned reloc use. */
8431 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
8432 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
8433 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
8434 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
8435 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
8436 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
8437 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
8438 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
8439 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
8440
8441 if (skip)
8442 memset (&outrel, 0, sizeof outrel);
8443 else if (!SYMBOL_REFERENCES_LOCAL (info, h)
8444 && !is_opd
8445 && r_type != R_PPC64_TOC)
8446 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
8447 else
8448 {
8449 /* This symbol is local, or marked to become local,
8450 or this is an opd section reloc which must point
8451 at a local function. */
8452 outrel.r_addend += relocation;
8453 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
8454 {
8455 if (is_opd && h != NULL)
8456 {
8457 /* Lie about opd entries. This case occurs
8458 when building shared libraries and we
8459 reference a function in another shared
8460 lib. The same thing happens for a weak
8461 definition in an application that's
8462 overridden by a strong definition in a
8463 shared lib. (I believe this is a generic
8464 bug in binutils handling of weak syms.)
8465 In these cases we won't use the opd
8466 entry in this lib. */
8467 unresolved_reloc = FALSE;
8468 }
8469 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8470
8471 /* We need to relocate .opd contents for ld.so.
8472 Prelink also wants simple and consistent rules
8473 for relocs. This make all RELATIVE relocs have
8474 *r_offset equal to r_addend. */
8475 relocate = TRUE;
8476 }
8477 else
8478 {
8479 long indx = 0;
8480
8481 if (bfd_is_abs_section (sec))
8482 ;
8483 else if (sec == NULL || sec->owner == NULL)
8484 {
8485 bfd_set_error (bfd_error_bad_value);
8486 return FALSE;
8487 }
8488 else
8489 {
8490 asection *osec;
8491
8492 osec = sec->output_section;
8493 indx = elf_section_data (osec)->dynindx;
8494
8495 /* We are turning this relocation into one
8496 against a section symbol, so subtract out
8497 the output section's address but not the
8498 offset of the input section in the output
8499 section. */
8500 outrel.r_addend -= osec->vma;
8501 }
8502
8503 outrel.r_info = ELF64_R_INFO (indx, r_type);
8504 }
8505 }
8506
8507 sreloc = elf_section_data (input_section)->sreloc;
8508 if (sreloc == NULL)
8509 abort ();
8510
8511 loc = sreloc->contents;
8512 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
8513 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
8514
8515 /* If this reloc is against an external symbol, it will
8516 be computed at runtime, so there's no need to do
8517 anything now. However, for the sake of prelink ensure
8518 that the section contents are a known value. */
8519 if (! relocate)
8520 {
8521 unresolved_reloc = FALSE;
8522 /* The value chosen here is quite arbitrary as ld.so
8523 ignores section contents except for the special
8524 case of .opd where the contents might be accessed
8525 before relocation. Choose zero, as that won't
8526 cause reloc overflow. */
8527 relocation = 0;
8528 addend = 0;
8529 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
8530 to improve backward compatibility with older
8531 versions of ld. */
8532 if (r_type == R_PPC64_ADDR64)
8533 addend = outrel.r_addend;
8534 /* Adjust pc_relative relocs to have zero in *r_offset. */
8535 else if (ppc64_elf_howto_table[r_type]->pc_relative)
8536 addend = (input_section->output_section->vma
8537 + input_section->output_offset
8538 + rel->r_offset);
8539 }
8540 }
8541 break;
8542
8543 case R_PPC64_COPY:
8544 case R_PPC64_GLOB_DAT:
8545 case R_PPC64_JMP_SLOT:
8546 case R_PPC64_RELATIVE:
8547 /* We shouldn't ever see these dynamic relocs in relocatable
8548 files. */
8549 /* Fall through. */
8550
8551 case R_PPC64_PLTGOT16:
8552 case R_PPC64_PLTGOT16_DS:
8553 case R_PPC64_PLTGOT16_HA:
8554 case R_PPC64_PLTGOT16_HI:
8555 case R_PPC64_PLTGOT16_LO:
8556 case R_PPC64_PLTGOT16_LO_DS:
8557 case R_PPC64_PLTREL32:
8558 case R_PPC64_PLTREL64:
8559 /* These ones haven't been implemented yet. */
8560
8561 (*_bfd_error_handler)
8562 (_("%s: relocation %s is not supported for symbol %s."),
8563 bfd_archive_filename (input_bfd),
8564 ppc64_elf_howto_table[r_type]->name, sym_name);
8565
8566 bfd_set_error (bfd_error_invalid_operation);
8567 ret = FALSE;
8568 continue;
8569 }
8570
8571 /* Do any further special processing. */
8572 switch (r_type)
8573 {
8574 default:
8575 break;
8576
8577 case R_PPC64_ADDR16_HA:
8578 case R_PPC64_ADDR16_HIGHERA:
8579 case R_PPC64_ADDR16_HIGHESTA:
8580 case R_PPC64_GOT16_HA:
8581 case R_PPC64_PLTGOT16_HA:
8582 case R_PPC64_PLT16_HA:
8583 case R_PPC64_TOC16_HA:
8584 case R_PPC64_SECTOFF_HA:
8585 case R_PPC64_TPREL16_HA:
8586 case R_PPC64_DTPREL16_HA:
8587 case R_PPC64_GOT_TLSGD16_HA:
8588 case R_PPC64_GOT_TLSLD16_HA:
8589 case R_PPC64_GOT_TPREL16_HA:
8590 case R_PPC64_GOT_DTPREL16_HA:
8591 case R_PPC64_TPREL16_HIGHER:
8592 case R_PPC64_TPREL16_HIGHERA:
8593 case R_PPC64_TPREL16_HIGHEST:
8594 case R_PPC64_TPREL16_HIGHESTA:
8595 case R_PPC64_DTPREL16_HIGHER:
8596 case R_PPC64_DTPREL16_HIGHERA:
8597 case R_PPC64_DTPREL16_HIGHEST:
8598 case R_PPC64_DTPREL16_HIGHESTA:
8599 /* It's just possible that this symbol is a weak symbol
8600 that's not actually defined anywhere. In that case,
8601 'sec' would be NULL, and we should leave the symbol
8602 alone (it will be set to zero elsewhere in the link). */
8603 if (sec != NULL)
8604 /* Add 0x10000 if sign bit in 0:15 is set.
8605 Bits 0:15 are not used. */
8606 addend += 0x8000;
8607 break;
8608
8609 case R_PPC64_ADDR16_DS:
8610 case R_PPC64_ADDR16_LO_DS:
8611 case R_PPC64_GOT16_DS:
8612 case R_PPC64_GOT16_LO_DS:
8613 case R_PPC64_PLT16_LO_DS:
8614 case R_PPC64_SECTOFF_DS:
8615 case R_PPC64_SECTOFF_LO_DS:
8616 case R_PPC64_TOC16_DS:
8617 case R_PPC64_TOC16_LO_DS:
8618 case R_PPC64_PLTGOT16_DS:
8619 case R_PPC64_PLTGOT16_LO_DS:
8620 case R_PPC64_GOT_TPREL16_DS:
8621 case R_PPC64_GOT_TPREL16_LO_DS:
8622 case R_PPC64_GOT_DTPREL16_DS:
8623 case R_PPC64_GOT_DTPREL16_LO_DS:
8624 case R_PPC64_TPREL16_DS:
8625 case R_PPC64_TPREL16_LO_DS:
8626 case R_PPC64_DTPREL16_DS:
8627 case R_PPC64_DTPREL16_LO_DS:
8628 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
8629 mask = 3;
8630 /* If this reloc is against an lq insn, then the value must be
8631 a multiple of 16. This is somewhat of a hack, but the
8632 "correct" way to do this by defining _DQ forms of all the
8633 _DS relocs bloats all reloc switches in this file. It
8634 doesn't seem to make much sense to use any of these relocs
8635 in data, so testing the insn should be safe. */
8636 if ((insn & (0x3f << 26)) == (56u << 26))
8637 mask = 15;
8638 if (((relocation + addend) & mask) != 0)
8639 {
8640 (*_bfd_error_handler)
8641 (_("%s: error: relocation %s not a multiple of %d"),
8642 bfd_archive_filename (input_bfd),
8643 ppc64_elf_howto_table[r_type]->name,
8644 mask + 1);
8645 bfd_set_error (bfd_error_bad_value);
8646 ret = FALSE;
8647 continue;
8648 }
8649 break;
8650
8651 case R_PPC64_REL14:
8652 case R_PPC64_REL14_BRNTAKEN:
8653 case R_PPC64_REL14_BRTAKEN:
8654 max_br_offset = 1 << 15;
8655 goto branch_check;
8656
8657 case R_PPC64_REL24:
8658 max_br_offset = 1 << 25;
8659
8660 branch_check:
8661 /* If the branch is out of reach or the TOC register needs
8662 adjusting, then redirect the call to the local stub for
8663 this function. */
8664 from = (rel->r_offset
8665 + input_section->output_offset
8666 + input_section->output_section->vma);
8667 if ((relocation + addend - from + max_br_offset >= 2 * max_br_offset
8668 || (sec != NULL
8669 && sec->output_section != NULL
8670 && sec->id <= htab->top_id
8671 && (htab->stub_group[sec->id].toc_off
8672 != htab->stub_group[input_section->id].toc_off)))
8673 && (stub_entry = ppc_get_stub_entry (input_section, sec, h,
8674 rel, htab)) != NULL)
8675 {
8676 /* Munge up the value and addend so that we call the stub
8677 rather than the procedure directly. */
8678 relocation = (stub_entry->stub_offset
8679 + stub_entry->stub_sec->output_offset
8680 + stub_entry->stub_sec->output_section->vma);
8681 addend = 0;
8682 }
8683 break;
8684 }
8685
8686 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
8687 because such sections are not SEC_ALLOC and thus ld.so will
8688 not process them. */
8689 if (unresolved_reloc
8690 && !((input_section->flags & SEC_DEBUGGING) != 0
8691 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
8692 {
8693 (*_bfd_error_handler)
8694 (_("%s(%s+0x%lx): unresolvable %s relocation against symbol `%s'"),
8695 bfd_archive_filename (input_bfd),
8696 bfd_get_section_name (input_bfd, input_section),
8697 (long) rel->r_offset,
8698 ppc64_elf_howto_table[(int) r_type]->name,
8699 h->root.root.string);
8700 ret = FALSE;
8701 }
8702
8703 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
8704 input_bfd,
8705 input_section,
8706 contents,
8707 rel->r_offset,
8708 relocation,
8709 addend);
8710
8711 if (r != bfd_reloc_ok)
8712 {
8713 if (sym_name == NULL)
8714 sym_name = "(null)";
8715 if (r == bfd_reloc_overflow)
8716 {
8717 if (warned)
8718 continue;
8719 if (h != NULL
8720 && h->root.type == bfd_link_hash_undefweak
8721 && ppc64_elf_howto_table[r_type]->pc_relative)
8722 {
8723 /* Assume this is a call protected by other code that
8724 detects the symbol is undefined. If this is the case,
8725 we can safely ignore the overflow. If not, the
8726 program is hosed anyway, and a little warning isn't
8727 going to help. */
8728
8729 continue;
8730 }
8731
8732 if (!((*info->callbacks->reloc_overflow)
8733 (info, sym_name, ppc64_elf_howto_table[r_type]->name,
8734 rel->r_addend, input_bfd, input_section, rel->r_offset)))
8735 return FALSE;
8736 }
8737 else
8738 {
8739 (*_bfd_error_handler)
8740 (_("%s(%s+0x%lx): %s reloc against `%s': error %d"),
8741 bfd_archive_filename (input_bfd),
8742 bfd_get_section_name (input_bfd, input_section),
8743 (long) rel->r_offset,
8744 ppc64_elf_howto_table[r_type]->name,
8745 sym_name,
8746 (int) r);
8747 ret = FALSE;
8748 }
8749 }
8750 }
8751
8752 return ret;
8753 }
8754
8755 /* Adjust the value of any local symbols in opd sections. */
8756
8757 static bfd_boolean
ppc64_elf_output_symbol_hook(struct bfd_link_info * info,const char * name ATTRIBUTE_UNUSED,Elf_Internal_Sym * elfsym,asection * input_sec,struct elf_link_hash_entry * h)8758 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
8759 const char *name ATTRIBUTE_UNUSED,
8760 Elf_Internal_Sym *elfsym,
8761 asection *input_sec,
8762 struct elf_link_hash_entry *h)
8763 {
8764 long *adjust;
8765 bfd_vma value;
8766
8767 if (h != NULL
8768 || input_sec == NULL
8769 || ppc64_elf_section_data (input_sec) == NULL
8770 || (adjust = ppc64_elf_section_data (input_sec)->opd.adjust) == NULL)
8771 return TRUE;
8772
8773 value = elfsym->st_value - input_sec->output_offset;
8774 if (!info->relocatable)
8775 value -= input_sec->output_section->vma;
8776
8777 elfsym->st_value += adjust[value / 24];
8778 return TRUE;
8779 }
8780
8781 /* Finish up dynamic symbol handling. We set the contents of various
8782 dynamic sections here. */
8783
8784 static bfd_boolean
ppc64_elf_finish_dynamic_symbol(bfd * output_bfd,struct bfd_link_info * info,struct elf_link_hash_entry * h,Elf_Internal_Sym * sym)8785 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
8786 struct bfd_link_info *info,
8787 struct elf_link_hash_entry *h,
8788 Elf_Internal_Sym *sym)
8789 {
8790 struct ppc_link_hash_table *htab;
8791 bfd *dynobj;
8792
8793 htab = ppc_hash_table (info);
8794 dynobj = htab->elf.dynobj;
8795
8796 if (((struct ppc_link_hash_entry *) h)->is_func_descriptor)
8797 {
8798 struct plt_entry *ent;
8799 Elf_Internal_Rela rela;
8800 bfd_byte *loc;
8801
8802 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
8803 if (ent->plt.offset != (bfd_vma) -1)
8804 {
8805 /* This symbol has an entry in the procedure linkage
8806 table. Set it up. */
8807
8808 if (htab->plt == NULL
8809 || htab->relplt == NULL
8810 || htab->glink == NULL)
8811 abort ();
8812
8813 /* Create a JMP_SLOT reloc to inform the dynamic linker to
8814 fill in the PLT entry. */
8815 rela.r_offset = (htab->plt->output_section->vma
8816 + htab->plt->output_offset
8817 + ent->plt.offset);
8818 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
8819 rela.r_addend = ent->addend;
8820
8821 loc = htab->relplt->contents;
8822 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
8823 * sizeof (Elf64_External_Rela));
8824 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
8825 }
8826 }
8827
8828 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
8829 {
8830 Elf_Internal_Rela rela;
8831 bfd_byte *loc;
8832
8833 /* This symbol needs a copy reloc. Set it up. */
8834
8835 if (h->dynindx == -1
8836 || (h->root.type != bfd_link_hash_defined
8837 && h->root.type != bfd_link_hash_defweak)
8838 || htab->relbss == NULL)
8839 abort ();
8840
8841 rela.r_offset = (h->root.u.def.value
8842 + h->root.u.def.section->output_section->vma
8843 + h->root.u.def.section->output_offset);
8844 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
8845 rela.r_addend = 0;
8846 loc = htab->relbss->contents;
8847 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
8848 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
8849 }
8850
8851 /* Mark some specially defined symbols as absolute. */
8852 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
8853 sym->st_shndx = SHN_ABS;
8854
8855 return TRUE;
8856 }
8857
8858 /* Used to decide how to sort relocs in an optimal manner for the
8859 dynamic linker, before writing them out. */
8860
8861 static enum elf_reloc_type_class
ppc64_elf_reloc_type_class(const Elf_Internal_Rela * rela)8862 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
8863 {
8864 enum elf_ppc64_reloc_type r_type;
8865
8866 r_type = ELF64_R_TYPE (rela->r_info);
8867 switch (r_type)
8868 {
8869 case R_PPC64_RELATIVE:
8870 return reloc_class_relative;
8871 case R_PPC64_JMP_SLOT:
8872 return reloc_class_plt;
8873 case R_PPC64_COPY:
8874 return reloc_class_copy;
8875 default:
8876 return reloc_class_normal;
8877 }
8878 }
8879
8880 /* Finish up the dynamic sections. */
8881
8882 static bfd_boolean
ppc64_elf_finish_dynamic_sections(bfd * output_bfd,struct bfd_link_info * info)8883 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
8884 struct bfd_link_info *info)
8885 {
8886 struct ppc_link_hash_table *htab;
8887 bfd *dynobj;
8888 asection *sdyn;
8889
8890 htab = ppc_hash_table (info);
8891 dynobj = htab->elf.dynobj;
8892 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
8893
8894 if (htab->elf.dynamic_sections_created)
8895 {
8896 Elf64_External_Dyn *dyncon, *dynconend;
8897
8898 if (sdyn == NULL || htab->got == NULL)
8899 abort ();
8900
8901 dyncon = (Elf64_External_Dyn *) sdyn->contents;
8902 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
8903 for (; dyncon < dynconend; dyncon++)
8904 {
8905 Elf_Internal_Dyn dyn;
8906 asection *s;
8907
8908 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
8909
8910 switch (dyn.d_tag)
8911 {
8912 default:
8913 continue;
8914
8915 case DT_PPC64_GLINK:
8916 s = htab->glink;
8917 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8918 /* We stupidly defined DT_PPC64_GLINK to be the start
8919 of glink rather than the first entry point, which is
8920 what ld.so needs, and now have a bigger stub to
8921 support automatic multiple TOCs. */
8922 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
8923 break;
8924
8925 case DT_PPC64_OPD:
8926 s = bfd_get_section_by_name (output_bfd, ".opd");
8927 if (s == NULL)
8928 continue;
8929 dyn.d_un.d_ptr = s->vma;
8930 break;
8931
8932 case DT_PPC64_OPDSZ:
8933 s = bfd_get_section_by_name (output_bfd, ".opd");
8934 if (s == NULL)
8935 continue;
8936 dyn.d_un.d_val = s->_raw_size;
8937 break;
8938
8939 case DT_PLTGOT:
8940 s = htab->plt;
8941 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8942 break;
8943
8944 case DT_JMPREL:
8945 s = htab->relplt;
8946 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8947 break;
8948
8949 case DT_PLTRELSZ:
8950 dyn.d_un.d_val = htab->relplt->_raw_size;
8951 break;
8952
8953 case DT_RELASZ:
8954 /* Don't count procedure linkage table relocs in the
8955 overall reloc count. */
8956 s = htab->relplt;
8957 if (s == NULL)
8958 continue;
8959 dyn.d_un.d_val -= s->_raw_size;
8960 break;
8961
8962 case DT_RELA:
8963 /* We may not be using the standard ELF linker script.
8964 If .rela.plt is the first .rela section, we adjust
8965 DT_RELA to not include it. */
8966 s = htab->relplt;
8967 if (s == NULL)
8968 continue;
8969 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
8970 continue;
8971 dyn.d_un.d_ptr += s->_raw_size;
8972 break;
8973 }
8974
8975 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
8976 }
8977 }
8978
8979 if (htab->got != NULL && htab->got->_raw_size != 0)
8980 {
8981 /* Fill in the first entry in the global offset table.
8982 We use it to hold the link-time TOCbase. */
8983 bfd_put_64 (output_bfd,
8984 elf_gp (output_bfd) + TOC_BASE_OFF,
8985 htab->got->contents);
8986
8987 /* Set .got entry size. */
8988 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
8989 }
8990
8991 if (htab->plt != NULL && htab->plt->_raw_size != 0)
8992 {
8993 /* Set .plt entry size. */
8994 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
8995 = PLT_ENTRY_SIZE;
8996 }
8997
8998 /* We need to handle writing out multiple GOT sections ourselves,
8999 since we didn't add them to DYNOBJ. */
9000 while ((dynobj = dynobj->link_next) != NULL)
9001 {
9002 asection *s;
9003 s = ppc64_elf_tdata (dynobj)->got;
9004 if (s != NULL
9005 && s->_raw_size != 0
9006 && s->output_section != bfd_abs_section_ptr
9007 && !bfd_set_section_contents (output_bfd, s->output_section,
9008 s->contents, s->output_offset,
9009 s->_raw_size))
9010 return FALSE;
9011 s = ppc64_elf_tdata (dynobj)->relgot;
9012 if (s != NULL
9013 && s->_raw_size != 0
9014 && s->output_section != bfd_abs_section_ptr
9015 && !bfd_set_section_contents (output_bfd, s->output_section,
9016 s->contents, s->output_offset,
9017 s->_raw_size))
9018 return FALSE;
9019 }
9020
9021 return TRUE;
9022 }
9023
9024 #include "elf64-target.h"
9025