1 /* PowerPC-specific support for 32-bit ELF
2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005, 2006 Free Software Foundation, Inc.
4 Written by Ian Lance Taylor, Cygnus Support.
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the
20 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
21 Boston, MA 02110-1301, USA. */
22
23 /* This file is based on a preliminary PowerPC ELF ABI. The
24 information may not match the final PowerPC ELF ABI. It includes
25 suggestions from the in-progress Embedded PowerPC ABI, and that
26 information may also not match. */
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/ppc.h"
34 #include "elf32-ppc.h"
35 #include "elf-vxworks.h"
36
37 /* RELA relocations are used here. */
38
39 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
40 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
41 static bfd_reloc_status_type ppc_elf_unhandled_reloc
42 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
43
44 /* Branch prediction bit for branch taken relocs. */
45 #define BRANCH_PREDICT_BIT 0x200000
46 /* Mask to set RA in memory instructions. */
47 #define RA_REGISTER_MASK 0x001f0000
48 /* Value to shift register by to insert RA. */
49 #define RA_REGISTER_SHIFT 16
50
51 /* The name of the dynamic interpreter. This is put in the .interp
52 section. */
53 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
54
55 /* For old-style PLT. */
56 /* The number of single-slot PLT entries (the rest use two slots). */
57 #define PLT_NUM_SINGLE_ENTRIES 8192
58
59 /* For new-style .glink and .plt. */
60 #define GLINK_PLTRESOLVE 16*4
61 #define GLINK_ENTRY_SIZE 4*4
62
63 /* VxWorks uses its own plt layout, filled in by the static linker. */
64
65 /* The standard VxWorks PLT entry. */
66 #define VXWORKS_PLT_ENTRY_SIZE 32
67 static const bfd_vma ppc_elf_vxworks_plt_entry
68 [VXWORKS_PLT_ENTRY_SIZE / 4] =
69 {
70 0x3d800000, /* lis r12,0 */
71 0x818c0000, /* lwz r12,0(r12) */
72 0x7d8903a6, /* mtctr r12 */
73 0x4e800420, /* bctr */
74 0x39600000, /* li r11,0 */
75 0x48000000, /* b 14 <.PLT0resolve+0x4> */
76 0x60000000, /* nop */
77 0x60000000, /* nop */
78 };
79 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
80 [VXWORKS_PLT_ENTRY_SIZE / 4] =
81 {
82 0x3d9e0000, /* addis r12,r30,0 */
83 0x818c0000, /* lwz r12,0(r12) */
84 0x7d8903a6, /* mtctr r12 */
85 0x4e800420, /* bctr */
86 0x39600000, /* li r11,0 */
87 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
88 0x60000000, /* nop */
89 0x60000000, /* nop */
90 };
91
92 /* The initial VxWorks PLT entry. */
93 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
94 static const bfd_vma ppc_elf_vxworks_plt0_entry
95 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
96 {
97 0x3d800000, /* lis r12,0 */
98 0x398c0000, /* addi r12,r12,0 */
99 0x800c0008, /* lwz r0,8(r12) */
100 0x7c0903a6, /* mtctr r0 */
101 0x818c0004, /* lwz r12,4(r12) */
102 0x4e800420, /* bctr */
103 0x60000000, /* nop */
104 0x60000000, /* nop */
105 };
106 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
107 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
108 {
109 0x819e0008, /* lwz r12,8(r30) */
110 0x7d8903a6, /* mtctr r12 */
111 0x819e0004, /* lwz r12,4(r30) */
112 0x4e800420, /* bctr */
113 0x60000000, /* nop */
114 0x60000000, /* nop */
115 0x60000000, /* nop */
116 0x60000000, /* nop */
117 };
118
119 /* For executables, we have some additional relocations in
120 .rela.plt.unloaded, for the kernel loader. */
121
122 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
123 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
124 /* The number of relocations in the PLTResolve slot. */
125 #define VXWORKS_PLTRESOLVE_RELOCS 2
126 /* The number of relocations in the PLTResolve slot when when creating
127 a shared library. */
128 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
129
130 /* Some instructions. */
131 #define ADDIS_11_11 0x3d6b0000
132 #define ADDIS_11_30 0x3d7e0000
133 #define ADDIS_12_12 0x3d8c0000
134 #define ADDI_11_11 0x396b0000
135 #define ADD_0_11_11 0x7c0b5a14
136 #define ADD_11_0_11 0x7d605a14
137 #define B 0x48000000
138 #define BCL_20_31 0x429f0005
139 #define BCTR 0x4e800420
140 #define LIS_11 0x3d600000
141 #define LIS_12 0x3d800000
142 #define LWZU_0_12 0x840c0000
143 #define LWZ_0_12 0x800c0000
144 #define LWZ_11_11 0x816b0000
145 #define LWZ_11_30 0x817e0000
146 #define LWZ_12_12 0x818c0000
147 #define MFLR_0 0x7c0802a6
148 #define MFLR_12 0x7d8802a6
149 #define MTCTR_0 0x7c0903a6
150 #define MTCTR_11 0x7d6903a6
151 #define MTLR_0 0x7c0803a6
152 #define NOP 0x60000000
153 #define SUB_11_11_12 0x7d6c5850
154
155 /* Offset of tp and dtp pointers from start of TLS block. */
156 #define TP_OFFSET 0x7000
157 #define DTP_OFFSET 0x8000
158
159 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
160
161 static reloc_howto_type ppc_elf_howto_raw[] = {
162 /* This reloc does nothing. */
163 HOWTO (R_PPC_NONE, /* type */
164 0, /* rightshift */
165 2, /* size (0 = byte, 1 = short, 2 = long) */
166 32, /* bitsize */
167 FALSE, /* pc_relative */
168 0, /* bitpos */
169 complain_overflow_bitfield, /* complain_on_overflow */
170 bfd_elf_generic_reloc, /* special_function */
171 "R_PPC_NONE", /* name */
172 FALSE, /* partial_inplace */
173 0, /* src_mask */
174 0, /* dst_mask */
175 FALSE), /* pcrel_offset */
176
177 /* A standard 32 bit relocation. */
178 HOWTO (R_PPC_ADDR32, /* type */
179 0, /* rightshift */
180 2, /* size (0 = byte, 1 = short, 2 = long) */
181 32, /* bitsize */
182 FALSE, /* pc_relative */
183 0, /* bitpos */
184 complain_overflow_bitfield, /* complain_on_overflow */
185 bfd_elf_generic_reloc, /* special_function */
186 "R_PPC_ADDR32", /* name */
187 FALSE, /* partial_inplace */
188 0, /* src_mask */
189 0xffffffff, /* dst_mask */
190 FALSE), /* pcrel_offset */
191
192 /* An absolute 26 bit branch; the lower two bits must be zero.
193 FIXME: we don't check that, we just clear them. */
194 HOWTO (R_PPC_ADDR24, /* type */
195 0, /* rightshift */
196 2, /* size (0 = byte, 1 = short, 2 = long) */
197 26, /* bitsize */
198 FALSE, /* pc_relative */
199 0, /* bitpos */
200 complain_overflow_bitfield, /* complain_on_overflow */
201 bfd_elf_generic_reloc, /* special_function */
202 "R_PPC_ADDR24", /* name */
203 FALSE, /* partial_inplace */
204 0, /* src_mask */
205 0x3fffffc, /* dst_mask */
206 FALSE), /* pcrel_offset */
207
208 /* A standard 16 bit relocation. */
209 HOWTO (R_PPC_ADDR16, /* type */
210 0, /* rightshift */
211 1, /* size (0 = byte, 1 = short, 2 = long) */
212 16, /* bitsize */
213 FALSE, /* pc_relative */
214 0, /* bitpos */
215 complain_overflow_bitfield, /* complain_on_overflow */
216 bfd_elf_generic_reloc, /* special_function */
217 "R_PPC_ADDR16", /* name */
218 FALSE, /* partial_inplace */
219 0, /* src_mask */
220 0xffff, /* dst_mask */
221 FALSE), /* pcrel_offset */
222
223 /* A 16 bit relocation without overflow. */
224 HOWTO (R_PPC_ADDR16_LO, /* type */
225 0, /* rightshift */
226 1, /* size (0 = byte, 1 = short, 2 = long) */
227 16, /* bitsize */
228 FALSE, /* pc_relative */
229 0, /* bitpos */
230 complain_overflow_dont,/* complain_on_overflow */
231 bfd_elf_generic_reloc, /* special_function */
232 "R_PPC_ADDR16_LO", /* name */
233 FALSE, /* partial_inplace */
234 0, /* src_mask */
235 0xffff, /* dst_mask */
236 FALSE), /* pcrel_offset */
237
238 /* The high order 16 bits of an address. */
239 HOWTO (R_PPC_ADDR16_HI, /* type */
240 16, /* rightshift */
241 1, /* size (0 = byte, 1 = short, 2 = long) */
242 16, /* bitsize */
243 FALSE, /* pc_relative */
244 0, /* bitpos */
245 complain_overflow_dont, /* complain_on_overflow */
246 bfd_elf_generic_reloc, /* special_function */
247 "R_PPC_ADDR16_HI", /* name */
248 FALSE, /* partial_inplace */
249 0, /* src_mask */
250 0xffff, /* dst_mask */
251 FALSE), /* pcrel_offset */
252
253 /* The high order 16 bits of an address, plus 1 if the contents of
254 the low 16 bits, treated as a signed number, is negative. */
255 HOWTO (R_PPC_ADDR16_HA, /* type */
256 16, /* rightshift */
257 1, /* size (0 = byte, 1 = short, 2 = long) */
258 16, /* bitsize */
259 FALSE, /* pc_relative */
260 0, /* bitpos */
261 complain_overflow_dont, /* complain_on_overflow */
262 ppc_elf_addr16_ha_reloc, /* special_function */
263 "R_PPC_ADDR16_HA", /* name */
264 FALSE, /* partial_inplace */
265 0, /* src_mask */
266 0xffff, /* dst_mask */
267 FALSE), /* pcrel_offset */
268
269 /* An absolute 16 bit branch; the lower two bits must be zero.
270 FIXME: we don't check that, we just clear them. */
271 HOWTO (R_PPC_ADDR14, /* type */
272 0, /* rightshift */
273 2, /* size (0 = byte, 1 = short, 2 = long) */
274 16, /* bitsize */
275 FALSE, /* pc_relative */
276 0, /* bitpos */
277 complain_overflow_bitfield, /* complain_on_overflow */
278 bfd_elf_generic_reloc, /* special_function */
279 "R_PPC_ADDR14", /* name */
280 FALSE, /* partial_inplace */
281 0, /* src_mask */
282 0xfffc, /* dst_mask */
283 FALSE), /* pcrel_offset */
284
285 /* An absolute 16 bit branch, for which bit 10 should be set to
286 indicate that the branch is expected to be taken. The lower two
287 bits must be zero. */
288 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
289 0, /* rightshift */
290 2, /* size (0 = byte, 1 = short, 2 = long) */
291 16, /* bitsize */
292 FALSE, /* pc_relative */
293 0, /* bitpos */
294 complain_overflow_bitfield, /* complain_on_overflow */
295 bfd_elf_generic_reloc, /* special_function */
296 "R_PPC_ADDR14_BRTAKEN",/* name */
297 FALSE, /* partial_inplace */
298 0, /* src_mask */
299 0xfffc, /* dst_mask */
300 FALSE), /* pcrel_offset */
301
302 /* An absolute 16 bit branch, for which bit 10 should be set to
303 indicate that the branch is not expected to be taken. The lower
304 two bits must be zero. */
305 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
306 0, /* rightshift */
307 2, /* size (0 = byte, 1 = short, 2 = long) */
308 16, /* bitsize */
309 FALSE, /* pc_relative */
310 0, /* bitpos */
311 complain_overflow_bitfield, /* complain_on_overflow */
312 bfd_elf_generic_reloc, /* special_function */
313 "R_PPC_ADDR14_BRNTAKEN",/* name */
314 FALSE, /* partial_inplace */
315 0, /* src_mask */
316 0xfffc, /* dst_mask */
317 FALSE), /* pcrel_offset */
318
319 /* A relative 26 bit branch; the lower two bits must be zero. */
320 HOWTO (R_PPC_REL24, /* type */
321 0, /* rightshift */
322 2, /* size (0 = byte, 1 = short, 2 = long) */
323 26, /* bitsize */
324 TRUE, /* pc_relative */
325 0, /* bitpos */
326 complain_overflow_signed, /* complain_on_overflow */
327 bfd_elf_generic_reloc, /* special_function */
328 "R_PPC_REL24", /* name */
329 FALSE, /* partial_inplace */
330 0, /* src_mask */
331 0x3fffffc, /* dst_mask */
332 TRUE), /* pcrel_offset */
333
334 /* A relative 16 bit branch; the lower two bits must be zero. */
335 HOWTO (R_PPC_REL14, /* type */
336 0, /* rightshift */
337 2, /* size (0 = byte, 1 = short, 2 = long) */
338 16, /* bitsize */
339 TRUE, /* pc_relative */
340 0, /* bitpos */
341 complain_overflow_signed, /* complain_on_overflow */
342 bfd_elf_generic_reloc, /* special_function */
343 "R_PPC_REL14", /* name */
344 FALSE, /* partial_inplace */
345 0, /* src_mask */
346 0xfffc, /* dst_mask */
347 TRUE), /* pcrel_offset */
348
349 /* A relative 16 bit branch. Bit 10 should be set to indicate that
350 the branch is expected to be taken. The lower two bits must be
351 zero. */
352 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
353 0, /* rightshift */
354 2, /* size (0 = byte, 1 = short, 2 = long) */
355 16, /* bitsize */
356 TRUE, /* pc_relative */
357 0, /* bitpos */
358 complain_overflow_signed, /* complain_on_overflow */
359 bfd_elf_generic_reloc, /* special_function */
360 "R_PPC_REL14_BRTAKEN", /* name */
361 FALSE, /* partial_inplace */
362 0, /* src_mask */
363 0xfffc, /* dst_mask */
364 TRUE), /* pcrel_offset */
365
366 /* A relative 16 bit branch. Bit 10 should be set to indicate that
367 the branch is not expected to be taken. The lower two bits must
368 be zero. */
369 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
370 0, /* rightshift */
371 2, /* size (0 = byte, 1 = short, 2 = long) */
372 16, /* bitsize */
373 TRUE, /* pc_relative */
374 0, /* bitpos */
375 complain_overflow_signed, /* complain_on_overflow */
376 bfd_elf_generic_reloc, /* special_function */
377 "R_PPC_REL14_BRNTAKEN",/* name */
378 FALSE, /* partial_inplace */
379 0, /* src_mask */
380 0xfffc, /* dst_mask */
381 TRUE), /* pcrel_offset */
382
383 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
384 symbol. */
385 HOWTO (R_PPC_GOT16, /* type */
386 0, /* rightshift */
387 1, /* size (0 = byte, 1 = short, 2 = long) */
388 16, /* bitsize */
389 FALSE, /* pc_relative */
390 0, /* bitpos */
391 complain_overflow_signed, /* complain_on_overflow */
392 bfd_elf_generic_reloc, /* special_function */
393 "R_PPC_GOT16", /* name */
394 FALSE, /* partial_inplace */
395 0, /* src_mask */
396 0xffff, /* dst_mask */
397 FALSE), /* pcrel_offset */
398
399 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
400 the symbol. */
401 HOWTO (R_PPC_GOT16_LO, /* type */
402 0, /* rightshift */
403 1, /* size (0 = byte, 1 = short, 2 = long) */
404 16, /* bitsize */
405 FALSE, /* pc_relative */
406 0, /* bitpos */
407 complain_overflow_dont, /* complain_on_overflow */
408 bfd_elf_generic_reloc, /* special_function */
409 "R_PPC_GOT16_LO", /* name */
410 FALSE, /* partial_inplace */
411 0, /* src_mask */
412 0xffff, /* dst_mask */
413 FALSE), /* pcrel_offset */
414
415 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
416 the symbol. */
417 HOWTO (R_PPC_GOT16_HI, /* type */
418 16, /* rightshift */
419 1, /* size (0 = byte, 1 = short, 2 = long) */
420 16, /* bitsize */
421 FALSE, /* pc_relative */
422 0, /* bitpos */
423 complain_overflow_bitfield, /* complain_on_overflow */
424 bfd_elf_generic_reloc, /* special_function */
425 "R_PPC_GOT16_HI", /* name */
426 FALSE, /* partial_inplace */
427 0, /* src_mask */
428 0xffff, /* dst_mask */
429 FALSE), /* pcrel_offset */
430
431 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
432 the symbol. */
433 HOWTO (R_PPC_GOT16_HA, /* type */
434 16, /* rightshift */
435 1, /* size (0 = byte, 1 = short, 2 = long) */
436 16, /* bitsize */
437 FALSE, /* pc_relative */
438 0, /* bitpos */
439 complain_overflow_bitfield, /* complain_on_overflow */
440 ppc_elf_addr16_ha_reloc, /* special_function */
441 "R_PPC_GOT16_HA", /* name */
442 FALSE, /* partial_inplace */
443 0, /* src_mask */
444 0xffff, /* dst_mask */
445 FALSE), /* pcrel_offset */
446
447 /* Like R_PPC_REL24, but referring to the procedure linkage table
448 entry for the symbol. */
449 HOWTO (R_PPC_PLTREL24, /* type */
450 0, /* rightshift */
451 2, /* size (0 = byte, 1 = short, 2 = long) */
452 26, /* bitsize */
453 TRUE, /* pc_relative */
454 0, /* bitpos */
455 complain_overflow_signed, /* complain_on_overflow */
456 bfd_elf_generic_reloc, /* special_function */
457 "R_PPC_PLTREL24", /* name */
458 FALSE, /* partial_inplace */
459 0, /* src_mask */
460 0x3fffffc, /* dst_mask */
461 TRUE), /* pcrel_offset */
462
463 /* This is used only by the dynamic linker. The symbol should exist
464 both in the object being run and in some shared library. The
465 dynamic linker copies the data addressed by the symbol from the
466 shared library into the object, because the object being
467 run has to have the data at some particular address. */
468 HOWTO (R_PPC_COPY, /* type */
469 0, /* rightshift */
470 2, /* size (0 = byte, 1 = short, 2 = long) */
471 32, /* bitsize */
472 FALSE, /* pc_relative */
473 0, /* bitpos */
474 complain_overflow_bitfield, /* complain_on_overflow */
475 bfd_elf_generic_reloc, /* special_function */
476 "R_PPC_COPY", /* name */
477 FALSE, /* partial_inplace */
478 0, /* src_mask */
479 0, /* dst_mask */
480 FALSE), /* pcrel_offset */
481
482 /* Like R_PPC_ADDR32, but used when setting global offset table
483 entries. */
484 HOWTO (R_PPC_GLOB_DAT, /* type */
485 0, /* rightshift */
486 2, /* size (0 = byte, 1 = short, 2 = long) */
487 32, /* bitsize */
488 FALSE, /* pc_relative */
489 0, /* bitpos */
490 complain_overflow_bitfield, /* complain_on_overflow */
491 bfd_elf_generic_reloc, /* special_function */
492 "R_PPC_GLOB_DAT", /* name */
493 FALSE, /* partial_inplace */
494 0, /* src_mask */
495 0xffffffff, /* dst_mask */
496 FALSE), /* pcrel_offset */
497
498 /* Marks a procedure linkage table entry for a symbol. */
499 HOWTO (R_PPC_JMP_SLOT, /* type */
500 0, /* rightshift */
501 2, /* size (0 = byte, 1 = short, 2 = long) */
502 32, /* bitsize */
503 FALSE, /* pc_relative */
504 0, /* bitpos */
505 complain_overflow_bitfield, /* complain_on_overflow */
506 bfd_elf_generic_reloc, /* special_function */
507 "R_PPC_JMP_SLOT", /* name */
508 FALSE, /* partial_inplace */
509 0, /* src_mask */
510 0, /* dst_mask */
511 FALSE), /* pcrel_offset */
512
513 /* Used only by the dynamic linker. When the object is run, this
514 longword is set to the load address of the object, plus the
515 addend. */
516 HOWTO (R_PPC_RELATIVE, /* type */
517 0, /* rightshift */
518 2, /* size (0 = byte, 1 = short, 2 = long) */
519 32, /* bitsize */
520 FALSE, /* pc_relative */
521 0, /* bitpos */
522 complain_overflow_bitfield, /* complain_on_overflow */
523 bfd_elf_generic_reloc, /* special_function */
524 "R_PPC_RELATIVE", /* name */
525 FALSE, /* partial_inplace */
526 0, /* src_mask */
527 0xffffffff, /* dst_mask */
528 FALSE), /* pcrel_offset */
529
530 /* Like R_PPC_REL24, but uses the value of the symbol within the
531 object rather than the final value. Normally used for
532 _GLOBAL_OFFSET_TABLE_. */
533 HOWTO (R_PPC_LOCAL24PC, /* type */
534 0, /* rightshift */
535 2, /* size (0 = byte, 1 = short, 2 = long) */
536 26, /* bitsize */
537 TRUE, /* pc_relative */
538 0, /* bitpos */
539 complain_overflow_signed, /* complain_on_overflow */
540 bfd_elf_generic_reloc, /* special_function */
541 "R_PPC_LOCAL24PC", /* name */
542 FALSE, /* partial_inplace */
543 0, /* src_mask */
544 0x3fffffc, /* dst_mask */
545 TRUE), /* pcrel_offset */
546
547 /* Like R_PPC_ADDR32, but may be unaligned. */
548 HOWTO (R_PPC_UADDR32, /* type */
549 0, /* rightshift */
550 2, /* size (0 = byte, 1 = short, 2 = long) */
551 32, /* bitsize */
552 FALSE, /* pc_relative */
553 0, /* bitpos */
554 complain_overflow_bitfield, /* complain_on_overflow */
555 bfd_elf_generic_reloc, /* special_function */
556 "R_PPC_UADDR32", /* name */
557 FALSE, /* partial_inplace */
558 0, /* src_mask */
559 0xffffffff, /* dst_mask */
560 FALSE), /* pcrel_offset */
561
562 /* Like R_PPC_ADDR16, but may be unaligned. */
563 HOWTO (R_PPC_UADDR16, /* type */
564 0, /* rightshift */
565 1, /* size (0 = byte, 1 = short, 2 = long) */
566 16, /* bitsize */
567 FALSE, /* pc_relative */
568 0, /* bitpos */
569 complain_overflow_bitfield, /* complain_on_overflow */
570 bfd_elf_generic_reloc, /* special_function */
571 "R_PPC_UADDR16", /* name */
572 FALSE, /* partial_inplace */
573 0, /* src_mask */
574 0xffff, /* dst_mask */
575 FALSE), /* pcrel_offset */
576
577 /* 32-bit PC relative */
578 HOWTO (R_PPC_REL32, /* type */
579 0, /* rightshift */
580 2, /* size (0 = byte, 1 = short, 2 = long) */
581 32, /* bitsize */
582 TRUE, /* pc_relative */
583 0, /* bitpos */
584 complain_overflow_bitfield, /* complain_on_overflow */
585 bfd_elf_generic_reloc, /* special_function */
586 "R_PPC_REL32", /* name */
587 FALSE, /* partial_inplace */
588 0, /* src_mask */
589 0xffffffff, /* dst_mask */
590 TRUE), /* pcrel_offset */
591
592 /* 32-bit relocation to the symbol's procedure linkage table.
593 FIXME: not supported. */
594 HOWTO (R_PPC_PLT32, /* type */
595 0, /* rightshift */
596 2, /* size (0 = byte, 1 = short, 2 = long) */
597 32, /* bitsize */
598 FALSE, /* pc_relative */
599 0, /* bitpos */
600 complain_overflow_bitfield, /* complain_on_overflow */
601 bfd_elf_generic_reloc, /* special_function */
602 "R_PPC_PLT32", /* name */
603 FALSE, /* partial_inplace */
604 0, /* src_mask */
605 0, /* dst_mask */
606 FALSE), /* pcrel_offset */
607
608 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
609 FIXME: not supported. */
610 HOWTO (R_PPC_PLTREL32, /* type */
611 0, /* rightshift */
612 2, /* size (0 = byte, 1 = short, 2 = long) */
613 32, /* bitsize */
614 TRUE, /* pc_relative */
615 0, /* bitpos */
616 complain_overflow_bitfield, /* complain_on_overflow */
617 bfd_elf_generic_reloc, /* special_function */
618 "R_PPC_PLTREL32", /* name */
619 FALSE, /* partial_inplace */
620 0, /* src_mask */
621 0, /* dst_mask */
622 TRUE), /* pcrel_offset */
623
624 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
625 the symbol. */
626 HOWTO (R_PPC_PLT16_LO, /* type */
627 0, /* rightshift */
628 1, /* size (0 = byte, 1 = short, 2 = long) */
629 16, /* bitsize */
630 FALSE, /* pc_relative */
631 0, /* bitpos */
632 complain_overflow_dont, /* complain_on_overflow */
633 bfd_elf_generic_reloc, /* special_function */
634 "R_PPC_PLT16_LO", /* name */
635 FALSE, /* partial_inplace */
636 0, /* src_mask */
637 0xffff, /* dst_mask */
638 FALSE), /* pcrel_offset */
639
640 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
641 the symbol. */
642 HOWTO (R_PPC_PLT16_HI, /* type */
643 16, /* rightshift */
644 1, /* size (0 = byte, 1 = short, 2 = long) */
645 16, /* bitsize */
646 FALSE, /* pc_relative */
647 0, /* bitpos */
648 complain_overflow_bitfield, /* complain_on_overflow */
649 bfd_elf_generic_reloc, /* special_function */
650 "R_PPC_PLT16_HI", /* name */
651 FALSE, /* partial_inplace */
652 0, /* src_mask */
653 0xffff, /* dst_mask */
654 FALSE), /* pcrel_offset */
655
656 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
657 the symbol. */
658 HOWTO (R_PPC_PLT16_HA, /* type */
659 16, /* rightshift */
660 1, /* size (0 = byte, 1 = short, 2 = long) */
661 16, /* bitsize */
662 FALSE, /* pc_relative */
663 0, /* bitpos */
664 complain_overflow_bitfield, /* complain_on_overflow */
665 ppc_elf_addr16_ha_reloc, /* special_function */
666 "R_PPC_PLT16_HA", /* name */
667 FALSE, /* partial_inplace */
668 0, /* src_mask */
669 0xffff, /* dst_mask */
670 FALSE), /* pcrel_offset */
671
672 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
673 small data items. */
674 HOWTO (R_PPC_SDAREL16, /* type */
675 0, /* rightshift */
676 1, /* size (0 = byte, 1 = short, 2 = long) */
677 16, /* bitsize */
678 FALSE, /* pc_relative */
679 0, /* bitpos */
680 complain_overflow_signed, /* complain_on_overflow */
681 bfd_elf_generic_reloc, /* special_function */
682 "R_PPC_SDAREL16", /* name */
683 FALSE, /* partial_inplace */
684 0, /* src_mask */
685 0xffff, /* dst_mask */
686 FALSE), /* pcrel_offset */
687
688 /* 16-bit section relative relocation. */
689 HOWTO (R_PPC_SECTOFF, /* type */
690 0, /* rightshift */
691 1, /* size (0 = byte, 1 = short, 2 = long) */
692 16, /* bitsize */
693 FALSE, /* pc_relative */
694 0, /* bitpos */
695 complain_overflow_bitfield, /* complain_on_overflow */
696 bfd_elf_generic_reloc, /* special_function */
697 "R_PPC_SECTOFF", /* name */
698 FALSE, /* partial_inplace */
699 0, /* src_mask */
700 0xffff, /* dst_mask */
701 FALSE), /* pcrel_offset */
702
703 /* 16-bit lower half section relative relocation. */
704 HOWTO (R_PPC_SECTOFF_LO, /* type */
705 0, /* rightshift */
706 1, /* size (0 = byte, 1 = short, 2 = long) */
707 16, /* bitsize */
708 FALSE, /* pc_relative */
709 0, /* bitpos */
710 complain_overflow_dont, /* complain_on_overflow */
711 bfd_elf_generic_reloc, /* special_function */
712 "R_PPC_SECTOFF_LO", /* name */
713 FALSE, /* partial_inplace */
714 0, /* src_mask */
715 0xffff, /* dst_mask */
716 FALSE), /* pcrel_offset */
717
718 /* 16-bit upper half section relative relocation. */
719 HOWTO (R_PPC_SECTOFF_HI, /* type */
720 16, /* rightshift */
721 1, /* size (0 = byte, 1 = short, 2 = long) */
722 16, /* bitsize */
723 FALSE, /* pc_relative */
724 0, /* bitpos */
725 complain_overflow_bitfield, /* complain_on_overflow */
726 bfd_elf_generic_reloc, /* special_function */
727 "R_PPC_SECTOFF_HI", /* name */
728 FALSE, /* partial_inplace */
729 0, /* src_mask */
730 0xffff, /* dst_mask */
731 FALSE), /* pcrel_offset */
732
733 /* 16-bit upper half adjusted section relative relocation. */
734 HOWTO (R_PPC_SECTOFF_HA, /* type */
735 16, /* rightshift */
736 1, /* size (0 = byte, 1 = short, 2 = long) */
737 16, /* bitsize */
738 FALSE, /* pc_relative */
739 0, /* bitpos */
740 complain_overflow_bitfield, /* complain_on_overflow */
741 ppc_elf_addr16_ha_reloc, /* special_function */
742 "R_PPC_SECTOFF_HA", /* name */
743 FALSE, /* partial_inplace */
744 0, /* src_mask */
745 0xffff, /* dst_mask */
746 FALSE), /* pcrel_offset */
747
748 /* Marker reloc for TLS. */
749 HOWTO (R_PPC_TLS,
750 0, /* rightshift */
751 2, /* size (0 = byte, 1 = short, 2 = long) */
752 32, /* bitsize */
753 FALSE, /* pc_relative */
754 0, /* bitpos */
755 complain_overflow_dont, /* complain_on_overflow */
756 bfd_elf_generic_reloc, /* special_function */
757 "R_PPC_TLS", /* name */
758 FALSE, /* partial_inplace */
759 0, /* src_mask */
760 0, /* dst_mask */
761 FALSE), /* pcrel_offset */
762
763 /* Computes the load module index of the load module that contains the
764 definition of its TLS sym. */
765 HOWTO (R_PPC_DTPMOD32,
766 0, /* rightshift */
767 2, /* size (0 = byte, 1 = short, 2 = long) */
768 32, /* bitsize */
769 FALSE, /* pc_relative */
770 0, /* bitpos */
771 complain_overflow_dont, /* complain_on_overflow */
772 ppc_elf_unhandled_reloc, /* special_function */
773 "R_PPC_DTPMOD32", /* name */
774 FALSE, /* partial_inplace */
775 0, /* src_mask */
776 0xffffffff, /* dst_mask */
777 FALSE), /* pcrel_offset */
778
779 /* Computes a dtv-relative displacement, the difference between the value
780 of sym+add and the base address of the thread-local storage block that
781 contains the definition of sym, minus 0x8000. */
782 HOWTO (R_PPC_DTPREL32,
783 0, /* rightshift */
784 2, /* size (0 = byte, 1 = short, 2 = long) */
785 32, /* bitsize */
786 FALSE, /* pc_relative */
787 0, /* bitpos */
788 complain_overflow_dont, /* complain_on_overflow */
789 ppc_elf_unhandled_reloc, /* special_function */
790 "R_PPC_DTPREL32", /* name */
791 FALSE, /* partial_inplace */
792 0, /* src_mask */
793 0xffffffff, /* dst_mask */
794 FALSE), /* pcrel_offset */
795
796 /* A 16 bit dtprel reloc. */
797 HOWTO (R_PPC_DTPREL16,
798 0, /* rightshift */
799 1, /* size (0 = byte, 1 = short, 2 = long) */
800 16, /* bitsize */
801 FALSE, /* pc_relative */
802 0, /* bitpos */
803 complain_overflow_signed, /* complain_on_overflow */
804 ppc_elf_unhandled_reloc, /* special_function */
805 "R_PPC_DTPREL16", /* name */
806 FALSE, /* partial_inplace */
807 0, /* src_mask */
808 0xffff, /* dst_mask */
809 FALSE), /* pcrel_offset */
810
811 /* Like DTPREL16, but no overflow. */
812 HOWTO (R_PPC_DTPREL16_LO,
813 0, /* rightshift */
814 1, /* size (0 = byte, 1 = short, 2 = long) */
815 16, /* bitsize */
816 FALSE, /* pc_relative */
817 0, /* bitpos */
818 complain_overflow_dont, /* complain_on_overflow */
819 ppc_elf_unhandled_reloc, /* special_function */
820 "R_PPC_DTPREL16_LO", /* name */
821 FALSE, /* partial_inplace */
822 0, /* src_mask */
823 0xffff, /* dst_mask */
824 FALSE), /* pcrel_offset */
825
826 /* Like DTPREL16_LO, but next higher group of 16 bits. */
827 HOWTO (R_PPC_DTPREL16_HI,
828 16, /* rightshift */
829 1, /* size (0 = byte, 1 = short, 2 = long) */
830 16, /* bitsize */
831 FALSE, /* pc_relative */
832 0, /* bitpos */
833 complain_overflow_dont, /* complain_on_overflow */
834 ppc_elf_unhandled_reloc, /* special_function */
835 "R_PPC_DTPREL16_HI", /* name */
836 FALSE, /* partial_inplace */
837 0, /* src_mask */
838 0xffff, /* dst_mask */
839 FALSE), /* pcrel_offset */
840
841 /* Like DTPREL16_HI, but adjust for low 16 bits. */
842 HOWTO (R_PPC_DTPREL16_HA,
843 16, /* rightshift */
844 1, /* size (0 = byte, 1 = short, 2 = long) */
845 16, /* bitsize */
846 FALSE, /* pc_relative */
847 0, /* bitpos */
848 complain_overflow_dont, /* complain_on_overflow */
849 ppc_elf_unhandled_reloc, /* special_function */
850 "R_PPC_DTPREL16_HA", /* name */
851 FALSE, /* partial_inplace */
852 0, /* src_mask */
853 0xffff, /* dst_mask */
854 FALSE), /* pcrel_offset */
855
856 /* Computes a tp-relative displacement, the difference between the value of
857 sym+add and the value of the thread pointer (r13). */
858 HOWTO (R_PPC_TPREL32,
859 0, /* rightshift */
860 2, /* size (0 = byte, 1 = short, 2 = long) */
861 32, /* bitsize */
862 FALSE, /* pc_relative */
863 0, /* bitpos */
864 complain_overflow_dont, /* complain_on_overflow */
865 ppc_elf_unhandled_reloc, /* special_function */
866 "R_PPC_TPREL32", /* name */
867 FALSE, /* partial_inplace */
868 0, /* src_mask */
869 0xffffffff, /* dst_mask */
870 FALSE), /* pcrel_offset */
871
872 /* A 16 bit tprel reloc. */
873 HOWTO (R_PPC_TPREL16,
874 0, /* rightshift */
875 1, /* size (0 = byte, 1 = short, 2 = long) */
876 16, /* bitsize */
877 FALSE, /* pc_relative */
878 0, /* bitpos */
879 complain_overflow_signed, /* complain_on_overflow */
880 ppc_elf_unhandled_reloc, /* special_function */
881 "R_PPC_TPREL16", /* name */
882 FALSE, /* partial_inplace */
883 0, /* src_mask */
884 0xffff, /* dst_mask */
885 FALSE), /* pcrel_offset */
886
887 /* Like TPREL16, but no overflow. */
888 HOWTO (R_PPC_TPREL16_LO,
889 0, /* rightshift */
890 1, /* size (0 = byte, 1 = short, 2 = long) */
891 16, /* bitsize */
892 FALSE, /* pc_relative */
893 0, /* bitpos */
894 complain_overflow_dont, /* complain_on_overflow */
895 ppc_elf_unhandled_reloc, /* special_function */
896 "R_PPC_TPREL16_LO", /* name */
897 FALSE, /* partial_inplace */
898 0, /* src_mask */
899 0xffff, /* dst_mask */
900 FALSE), /* pcrel_offset */
901
902 /* Like TPREL16_LO, but next higher group of 16 bits. */
903 HOWTO (R_PPC_TPREL16_HI,
904 16, /* rightshift */
905 1, /* size (0 = byte, 1 = short, 2 = long) */
906 16, /* bitsize */
907 FALSE, /* pc_relative */
908 0, /* bitpos */
909 complain_overflow_dont, /* complain_on_overflow */
910 ppc_elf_unhandled_reloc, /* special_function */
911 "R_PPC_TPREL16_HI", /* name */
912 FALSE, /* partial_inplace */
913 0, /* src_mask */
914 0xffff, /* dst_mask */
915 FALSE), /* pcrel_offset */
916
917 /* Like TPREL16_HI, but adjust for low 16 bits. */
918 HOWTO (R_PPC_TPREL16_HA,
919 16, /* rightshift */
920 1, /* size (0 = byte, 1 = short, 2 = long) */
921 16, /* bitsize */
922 FALSE, /* pc_relative */
923 0, /* bitpos */
924 complain_overflow_dont, /* complain_on_overflow */
925 ppc_elf_unhandled_reloc, /* special_function */
926 "R_PPC_TPREL16_HA", /* name */
927 FALSE, /* partial_inplace */
928 0, /* src_mask */
929 0xffff, /* dst_mask */
930 FALSE), /* pcrel_offset */
931
932 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
933 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
934 to the first entry. */
935 HOWTO (R_PPC_GOT_TLSGD16,
936 0, /* rightshift */
937 1, /* size (0 = byte, 1 = short, 2 = long) */
938 16, /* bitsize */
939 FALSE, /* pc_relative */
940 0, /* bitpos */
941 complain_overflow_signed, /* complain_on_overflow */
942 ppc_elf_unhandled_reloc, /* special_function */
943 "R_PPC_GOT_TLSGD16", /* name */
944 FALSE, /* partial_inplace */
945 0, /* src_mask */
946 0xffff, /* dst_mask */
947 FALSE), /* pcrel_offset */
948
949 /* Like GOT_TLSGD16, but no overflow. */
950 HOWTO (R_PPC_GOT_TLSGD16_LO,
951 0, /* rightshift */
952 1, /* size (0 = byte, 1 = short, 2 = long) */
953 16, /* bitsize */
954 FALSE, /* pc_relative */
955 0, /* bitpos */
956 complain_overflow_dont, /* complain_on_overflow */
957 ppc_elf_unhandled_reloc, /* special_function */
958 "R_PPC_GOT_TLSGD16_LO", /* name */
959 FALSE, /* partial_inplace */
960 0, /* src_mask */
961 0xffff, /* dst_mask */
962 FALSE), /* pcrel_offset */
963
964 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
965 HOWTO (R_PPC_GOT_TLSGD16_HI,
966 16, /* rightshift */
967 1, /* size (0 = byte, 1 = short, 2 = long) */
968 16, /* bitsize */
969 FALSE, /* pc_relative */
970 0, /* bitpos */
971 complain_overflow_dont, /* complain_on_overflow */
972 ppc_elf_unhandled_reloc, /* special_function */
973 "R_PPC_GOT_TLSGD16_HI", /* name */
974 FALSE, /* partial_inplace */
975 0, /* src_mask */
976 0xffff, /* dst_mask */
977 FALSE), /* pcrel_offset */
978
979 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
980 HOWTO (R_PPC_GOT_TLSGD16_HA,
981 16, /* rightshift */
982 1, /* size (0 = byte, 1 = short, 2 = long) */
983 16, /* bitsize */
984 FALSE, /* pc_relative */
985 0, /* bitpos */
986 complain_overflow_dont, /* complain_on_overflow */
987 ppc_elf_unhandled_reloc, /* special_function */
988 "R_PPC_GOT_TLSGD16_HA", /* name */
989 FALSE, /* partial_inplace */
990 0, /* src_mask */
991 0xffff, /* dst_mask */
992 FALSE), /* pcrel_offset */
993
994 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
995 with values (sym+add)@dtpmod and zero, and computes the offset to the
996 first entry. */
997 HOWTO (R_PPC_GOT_TLSLD16,
998 0, /* rightshift */
999 1, /* size (0 = byte, 1 = short, 2 = long) */
1000 16, /* bitsize */
1001 FALSE, /* pc_relative */
1002 0, /* bitpos */
1003 complain_overflow_signed, /* complain_on_overflow */
1004 ppc_elf_unhandled_reloc, /* special_function */
1005 "R_PPC_GOT_TLSLD16", /* name */
1006 FALSE, /* partial_inplace */
1007 0, /* src_mask */
1008 0xffff, /* dst_mask */
1009 FALSE), /* pcrel_offset */
1010
1011 /* Like GOT_TLSLD16, but no overflow. */
1012 HOWTO (R_PPC_GOT_TLSLD16_LO,
1013 0, /* 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 ppc_elf_unhandled_reloc, /* special_function */
1020 "R_PPC_GOT_TLSLD16_LO", /* name */
1021 FALSE, /* partial_inplace */
1022 0, /* src_mask */
1023 0xffff, /* dst_mask */
1024 FALSE), /* pcrel_offset */
1025
1026 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1027 HOWTO (R_PPC_GOT_TLSLD16_HI,
1028 16, /* rightshift */
1029 1, /* size (0 = byte, 1 = short, 2 = long) */
1030 16, /* bitsize */
1031 FALSE, /* pc_relative */
1032 0, /* bitpos */
1033 complain_overflow_dont, /* complain_on_overflow */
1034 ppc_elf_unhandled_reloc, /* special_function */
1035 "R_PPC_GOT_TLSLD16_HI", /* name */
1036 FALSE, /* partial_inplace */
1037 0, /* src_mask */
1038 0xffff, /* dst_mask */
1039 FALSE), /* pcrel_offset */
1040
1041 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1042 HOWTO (R_PPC_GOT_TLSLD16_HA,
1043 16, /* rightshift */
1044 1, /* size (0 = byte, 1 = short, 2 = long) */
1045 16, /* bitsize */
1046 FALSE, /* pc_relative */
1047 0, /* bitpos */
1048 complain_overflow_dont, /* complain_on_overflow */
1049 ppc_elf_unhandled_reloc, /* special_function */
1050 "R_PPC_GOT_TLSLD16_HA", /* name */
1051 FALSE, /* partial_inplace */
1052 0, /* src_mask */
1053 0xffff, /* dst_mask */
1054 FALSE), /* pcrel_offset */
1055
1056 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1057 the offset to the entry. */
1058 HOWTO (R_PPC_GOT_DTPREL16,
1059 0, /* rightshift */
1060 1, /* size (0 = byte, 1 = short, 2 = long) */
1061 16, /* bitsize */
1062 FALSE, /* pc_relative */
1063 0, /* bitpos */
1064 complain_overflow_signed, /* complain_on_overflow */
1065 ppc_elf_unhandled_reloc, /* special_function */
1066 "R_PPC_GOT_DTPREL16", /* name */
1067 FALSE, /* partial_inplace */
1068 0, /* src_mask */
1069 0xffff, /* dst_mask */
1070 FALSE), /* pcrel_offset */
1071
1072 /* Like GOT_DTPREL16, but no overflow. */
1073 HOWTO (R_PPC_GOT_DTPREL16_LO,
1074 0, /* rightshift */
1075 1, /* size (0 = byte, 1 = short, 2 = long) */
1076 16, /* bitsize */
1077 FALSE, /* pc_relative */
1078 0, /* bitpos */
1079 complain_overflow_dont, /* complain_on_overflow */
1080 ppc_elf_unhandled_reloc, /* special_function */
1081 "R_PPC_GOT_DTPREL16_LO", /* name */
1082 FALSE, /* partial_inplace */
1083 0, /* src_mask */
1084 0xffff, /* dst_mask */
1085 FALSE), /* pcrel_offset */
1086
1087 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1088 HOWTO (R_PPC_GOT_DTPREL16_HI,
1089 16, /* rightshift */
1090 1, /* size (0 = byte, 1 = short, 2 = long) */
1091 16, /* bitsize */
1092 FALSE, /* pc_relative */
1093 0, /* bitpos */
1094 complain_overflow_dont, /* complain_on_overflow */
1095 ppc_elf_unhandled_reloc, /* special_function */
1096 "R_PPC_GOT_DTPREL16_HI", /* name */
1097 FALSE, /* partial_inplace */
1098 0, /* src_mask */
1099 0xffff, /* dst_mask */
1100 FALSE), /* pcrel_offset */
1101
1102 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1103 HOWTO (R_PPC_GOT_DTPREL16_HA,
1104 16, /* rightshift */
1105 1, /* size (0 = byte, 1 = short, 2 = long) */
1106 16, /* bitsize */
1107 FALSE, /* pc_relative */
1108 0, /* bitpos */
1109 complain_overflow_dont, /* complain_on_overflow */
1110 ppc_elf_unhandled_reloc, /* special_function */
1111 "R_PPC_GOT_DTPREL16_HA", /* name */
1112 FALSE, /* partial_inplace */
1113 0, /* src_mask */
1114 0xffff, /* dst_mask */
1115 FALSE), /* pcrel_offset */
1116
1117 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1118 offset to the entry. */
1119 HOWTO (R_PPC_GOT_TPREL16,
1120 0, /* rightshift */
1121 1, /* size (0 = byte, 1 = short, 2 = long) */
1122 16, /* bitsize */
1123 FALSE, /* pc_relative */
1124 0, /* bitpos */
1125 complain_overflow_signed, /* complain_on_overflow */
1126 ppc_elf_unhandled_reloc, /* special_function */
1127 "R_PPC_GOT_TPREL16", /* name */
1128 FALSE, /* partial_inplace */
1129 0, /* src_mask */
1130 0xffff, /* dst_mask */
1131 FALSE), /* pcrel_offset */
1132
1133 /* Like GOT_TPREL16, but no overflow. */
1134 HOWTO (R_PPC_GOT_TPREL16_LO,
1135 0, /* rightshift */
1136 1, /* size (0 = byte, 1 = short, 2 = long) */
1137 16, /* bitsize */
1138 FALSE, /* pc_relative */
1139 0, /* bitpos */
1140 complain_overflow_dont, /* complain_on_overflow */
1141 ppc_elf_unhandled_reloc, /* special_function */
1142 "R_PPC_GOT_TPREL16_LO", /* name */
1143 FALSE, /* partial_inplace */
1144 0, /* src_mask */
1145 0xffff, /* dst_mask */
1146 FALSE), /* pcrel_offset */
1147
1148 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1149 HOWTO (R_PPC_GOT_TPREL16_HI,
1150 16, /* rightshift */
1151 1, /* size (0 = byte, 1 = short, 2 = long) */
1152 16, /* bitsize */
1153 FALSE, /* pc_relative */
1154 0, /* bitpos */
1155 complain_overflow_dont, /* complain_on_overflow */
1156 ppc_elf_unhandled_reloc, /* special_function */
1157 "R_PPC_GOT_TPREL16_HI", /* name */
1158 FALSE, /* partial_inplace */
1159 0, /* src_mask */
1160 0xffff, /* dst_mask */
1161 FALSE), /* pcrel_offset */
1162
1163 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1164 HOWTO (R_PPC_GOT_TPREL16_HA,
1165 16, /* rightshift */
1166 1, /* size (0 = byte, 1 = short, 2 = long) */
1167 16, /* bitsize */
1168 FALSE, /* pc_relative */
1169 0, /* bitpos */
1170 complain_overflow_dont, /* complain_on_overflow */
1171 ppc_elf_unhandled_reloc, /* special_function */
1172 "R_PPC_GOT_TPREL16_HA", /* name */
1173 FALSE, /* partial_inplace */
1174 0, /* src_mask */
1175 0xffff, /* dst_mask */
1176 FALSE), /* pcrel_offset */
1177
1178 /* The remaining relocs are from the Embedded ELF ABI, and are not
1179 in the SVR4 ELF ABI. */
1180
1181 /* 32 bit value resulting from the addend minus the symbol. */
1182 HOWTO (R_PPC_EMB_NADDR32, /* type */
1183 0, /* rightshift */
1184 2, /* size (0 = byte, 1 = short, 2 = long) */
1185 32, /* bitsize */
1186 FALSE, /* pc_relative */
1187 0, /* bitpos */
1188 complain_overflow_bitfield, /* complain_on_overflow */
1189 bfd_elf_generic_reloc, /* special_function */
1190 "R_PPC_EMB_NADDR32", /* name */
1191 FALSE, /* partial_inplace */
1192 0, /* src_mask */
1193 0xffffffff, /* dst_mask */
1194 FALSE), /* pcrel_offset */
1195
1196 /* 16 bit value resulting from the addend minus the symbol. */
1197 HOWTO (R_PPC_EMB_NADDR16, /* 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_bitfield, /* complain_on_overflow */
1204 bfd_elf_generic_reloc, /* special_function */
1205 "R_PPC_EMB_NADDR16", /* name */
1206 FALSE, /* partial_inplace */
1207 0, /* src_mask */
1208 0xffff, /* dst_mask */
1209 FALSE), /* pcrel_offset */
1210
1211 /* 16 bit value resulting from the addend minus the symbol. */
1212 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1213 0, /* rightshift */
1214 1, /* size (0 = byte, 1 = short, 2 = long) */
1215 16, /* bitsize */
1216 FALSE, /* pc_relative */
1217 0, /* bitpos */
1218 complain_overflow_dont,/* complain_on_overflow */
1219 bfd_elf_generic_reloc, /* special_function */
1220 "R_PPC_EMB_ADDR16_LO", /* name */
1221 FALSE, /* partial_inplace */
1222 0, /* src_mask */
1223 0xffff, /* dst_mask */
1224 FALSE), /* pcrel_offset */
1225
1226 /* The high order 16 bits of the addend minus the symbol. */
1227 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1228 16, /* rightshift */
1229 1, /* size (0 = byte, 1 = short, 2 = long) */
1230 16, /* bitsize */
1231 FALSE, /* pc_relative */
1232 0, /* bitpos */
1233 complain_overflow_dont, /* complain_on_overflow */
1234 bfd_elf_generic_reloc, /* special_function */
1235 "R_PPC_EMB_NADDR16_HI", /* name */
1236 FALSE, /* partial_inplace */
1237 0, /* src_mask */
1238 0xffff, /* dst_mask */
1239 FALSE), /* pcrel_offset */
1240
1241 /* The high order 16 bits of the result of the addend minus the address,
1242 plus 1 if the contents of the low 16 bits, treated as a signed number,
1243 is negative. */
1244 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1245 16, /* rightshift */
1246 1, /* size (0 = byte, 1 = short, 2 = long) */
1247 16, /* bitsize */
1248 FALSE, /* pc_relative */
1249 0, /* bitpos */
1250 complain_overflow_dont, /* complain_on_overflow */
1251 ppc_elf_addr16_ha_reloc, /* special_function */
1252 "R_PPC_EMB_NADDR16_HA", /* name */
1253 FALSE, /* partial_inplace */
1254 0, /* src_mask */
1255 0xffff, /* dst_mask */
1256 FALSE), /* pcrel_offset */
1257
1258 /* 16 bit value resulting from allocating a 4 byte word to hold an
1259 address in the .sdata section, and returning the offset from
1260 _SDA_BASE_ for that relocation. */
1261 HOWTO (R_PPC_EMB_SDAI16, /* type */
1262 0, /* rightshift */
1263 1, /* size (0 = byte, 1 = short, 2 = long) */
1264 16, /* bitsize */
1265 FALSE, /* pc_relative */
1266 0, /* bitpos */
1267 complain_overflow_bitfield, /* complain_on_overflow */
1268 bfd_elf_generic_reloc, /* special_function */
1269 "R_PPC_EMB_SDAI16", /* name */
1270 FALSE, /* partial_inplace */
1271 0, /* src_mask */
1272 0xffff, /* dst_mask */
1273 FALSE), /* pcrel_offset */
1274
1275 /* 16 bit value resulting from allocating a 4 byte word to hold an
1276 address in the .sdata2 section, and returning the offset from
1277 _SDA2_BASE_ for that relocation. */
1278 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1279 0, /* rightshift */
1280 1, /* size (0 = byte, 1 = short, 2 = long) */
1281 16, /* bitsize */
1282 FALSE, /* pc_relative */
1283 0, /* bitpos */
1284 complain_overflow_bitfield, /* complain_on_overflow */
1285 bfd_elf_generic_reloc, /* special_function */
1286 "R_PPC_EMB_SDA2I16", /* name */
1287 FALSE, /* partial_inplace */
1288 0, /* src_mask */
1289 0xffff, /* dst_mask */
1290 FALSE), /* pcrel_offset */
1291
1292 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1293 small data items. */
1294 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1295 0, /* rightshift */
1296 1, /* size (0 = byte, 1 = short, 2 = long) */
1297 16, /* bitsize */
1298 FALSE, /* pc_relative */
1299 0, /* bitpos */
1300 complain_overflow_signed, /* complain_on_overflow */
1301 bfd_elf_generic_reloc, /* special_function */
1302 "R_PPC_EMB_SDA2REL", /* name */
1303 FALSE, /* partial_inplace */
1304 0, /* src_mask */
1305 0xffff, /* dst_mask */
1306 FALSE), /* pcrel_offset */
1307
1308 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1309 signed offset from the appropriate base, and filling in the register
1310 field with the appropriate register (0, 2, or 13). */
1311 HOWTO (R_PPC_EMB_SDA21, /* type */
1312 0, /* rightshift */
1313 2, /* size (0 = byte, 1 = short, 2 = long) */
1314 16, /* bitsize */
1315 FALSE, /* pc_relative */
1316 0, /* bitpos */
1317 complain_overflow_signed, /* complain_on_overflow */
1318 bfd_elf_generic_reloc, /* special_function */
1319 "R_PPC_EMB_SDA21", /* name */
1320 FALSE, /* partial_inplace */
1321 0, /* src_mask */
1322 0xffff, /* dst_mask */
1323 FALSE), /* pcrel_offset */
1324
1325 /* Relocation not handled: R_PPC_EMB_MRKREF */
1326 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1327 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1328 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1329 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1330 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1331
1332 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1333 in the 16 bit signed offset from the appropriate base, and filling in the
1334 register field with the appropriate register (0, 2, or 13). */
1335 HOWTO (R_PPC_EMB_RELSDA, /* type */
1336 0, /* rightshift */
1337 1, /* size (0 = byte, 1 = short, 2 = long) */
1338 16, /* bitsize */
1339 TRUE, /* pc_relative */
1340 0, /* bitpos */
1341 complain_overflow_signed, /* complain_on_overflow */
1342 bfd_elf_generic_reloc, /* special_function */
1343 "R_PPC_EMB_RELSDA", /* name */
1344 FALSE, /* partial_inplace */
1345 0, /* src_mask */
1346 0xffff, /* dst_mask */
1347 FALSE), /* pcrel_offset */
1348
1349 /* A 16 bit relative relocation. */
1350 HOWTO (R_PPC_REL16, /* type */
1351 0, /* rightshift */
1352 1, /* size (0 = byte, 1 = short, 2 = long) */
1353 16, /* bitsize */
1354 TRUE, /* pc_relative */
1355 0, /* bitpos */
1356 complain_overflow_bitfield, /* complain_on_overflow */
1357 bfd_elf_generic_reloc, /* special_function */
1358 "R_PPC_REL16", /* name */
1359 FALSE, /* partial_inplace */
1360 0, /* src_mask */
1361 0xffff, /* dst_mask */
1362 TRUE), /* pcrel_offset */
1363
1364 /* A 16 bit relative relocation without overflow. */
1365 HOWTO (R_PPC_REL16_LO, /* type */
1366 0, /* rightshift */
1367 1, /* size (0 = byte, 1 = short, 2 = long) */
1368 16, /* bitsize */
1369 TRUE, /* pc_relative */
1370 0, /* bitpos */
1371 complain_overflow_dont,/* complain_on_overflow */
1372 bfd_elf_generic_reloc, /* special_function */
1373 "R_PPC_REL16_LO", /* name */
1374 FALSE, /* partial_inplace */
1375 0, /* src_mask */
1376 0xffff, /* dst_mask */
1377 TRUE), /* pcrel_offset */
1378
1379 /* The high order 16 bits of a relative address. */
1380 HOWTO (R_PPC_REL16_HI, /* type */
1381 16, /* rightshift */
1382 1, /* size (0 = byte, 1 = short, 2 = long) */
1383 16, /* bitsize */
1384 TRUE, /* pc_relative */
1385 0, /* bitpos */
1386 complain_overflow_dont, /* complain_on_overflow */
1387 bfd_elf_generic_reloc, /* special_function */
1388 "R_PPC_REL16_HI", /* name */
1389 FALSE, /* partial_inplace */
1390 0, /* src_mask */
1391 0xffff, /* dst_mask */
1392 TRUE), /* pcrel_offset */
1393
1394 /* The high order 16 bits of a relative address, plus 1 if the contents of
1395 the low 16 bits, treated as a signed number, is negative. */
1396 HOWTO (R_PPC_REL16_HA, /* type */
1397 16, /* rightshift */
1398 1, /* size (0 = byte, 1 = short, 2 = long) */
1399 16, /* bitsize */
1400 TRUE, /* pc_relative */
1401 0, /* bitpos */
1402 complain_overflow_dont, /* complain_on_overflow */
1403 ppc_elf_addr16_ha_reloc, /* special_function */
1404 "R_PPC_REL16_HA", /* name */
1405 FALSE, /* partial_inplace */
1406 0, /* src_mask */
1407 0xffff, /* dst_mask */
1408 TRUE), /* pcrel_offset */
1409
1410 /* GNU extension to record C++ vtable hierarchy. */
1411 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1412 0, /* rightshift */
1413 0, /* size (0 = byte, 1 = short, 2 = long) */
1414 0, /* bitsize */
1415 FALSE, /* pc_relative */
1416 0, /* bitpos */
1417 complain_overflow_dont, /* complain_on_overflow */
1418 NULL, /* special_function */
1419 "R_PPC_GNU_VTINHERIT", /* name */
1420 FALSE, /* partial_inplace */
1421 0, /* src_mask */
1422 0, /* dst_mask */
1423 FALSE), /* pcrel_offset */
1424
1425 /* GNU extension to record C++ vtable member usage. */
1426 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1427 0, /* rightshift */
1428 0, /* size (0 = byte, 1 = short, 2 = long) */
1429 0, /* bitsize */
1430 FALSE, /* pc_relative */
1431 0, /* bitpos */
1432 complain_overflow_dont, /* complain_on_overflow */
1433 NULL, /* special_function */
1434 "R_PPC_GNU_VTENTRY", /* name */
1435 FALSE, /* partial_inplace */
1436 0, /* src_mask */
1437 0, /* dst_mask */
1438 FALSE), /* pcrel_offset */
1439
1440 /* Phony reloc to handle AIX style TOC entries. */
1441 HOWTO (R_PPC_TOC16, /* type */
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_signed, /* complain_on_overflow */
1448 bfd_elf_generic_reloc, /* special_function */
1449 "R_PPC_TOC16", /* name */
1450 FALSE, /* partial_inplace */
1451 0, /* src_mask */
1452 0xffff, /* dst_mask */
1453 FALSE), /* pcrel_offset */
1454 };
1455
1456 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1457
1458 static void
ppc_elf_howto_init(void)1459 ppc_elf_howto_init (void)
1460 {
1461 unsigned int i, type;
1462
1463 for (i = 0;
1464 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1465 i++)
1466 {
1467 type = ppc_elf_howto_raw[i].type;
1468 if (type >= (sizeof (ppc_elf_howto_table)
1469 / sizeof (ppc_elf_howto_table[0])))
1470 abort ();
1471 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1472 }
1473 }
1474
1475 static reloc_howto_type *
ppc_elf_reloc_type_lookup(bfd * abfd ATTRIBUTE_UNUSED,bfd_reloc_code_real_type code)1476 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1477 bfd_reloc_code_real_type code)
1478 {
1479 enum elf_ppc_reloc_type r;
1480
1481 /* Initialize howto table if not already done. */
1482 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1483 ppc_elf_howto_init ();
1484
1485 switch (code)
1486 {
1487 default:
1488 return NULL;
1489
1490 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1491 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1492 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1493 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1494 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1495 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1496 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1497 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1498 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1499 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1500 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1501 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1502 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1503 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1504 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1505 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1506 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1507 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1508 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1509 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1510 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1511 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1512 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1513 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1514 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1515 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1516 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1517 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1518 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1519 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1520 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1521 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1522 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1523 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1524 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1525 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1526 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1527 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1528 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1529 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1530 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1531 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1532 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1533 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1534 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1535 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1536 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1537 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1538 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1539 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1540 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1541 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1542 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1543 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1544 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1545 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1546 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1547 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1548 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1549 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1550 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1551 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1552 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1553 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1554 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1555 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1556 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1557 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1558 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1559 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1560 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1561 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1562 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1563 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1564 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1565 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1566 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1567 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1568 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1569 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
1570 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
1571 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
1572 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
1573 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
1574 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
1575 }
1576
1577 return ppc_elf_howto_table[r];
1578 };
1579
1580 /* Set the howto pointer for a PowerPC ELF reloc. */
1581
1582 static void
ppc_elf_info_to_howto(bfd * abfd ATTRIBUTE_UNUSED,arelent * cache_ptr,Elf_Internal_Rela * dst)1583 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
1584 arelent *cache_ptr,
1585 Elf_Internal_Rela *dst)
1586 {
1587 /* Initialize howto table if not already done. */
1588 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1589 ppc_elf_howto_init ();
1590
1591 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
1592 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
1593 }
1594
1595 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
1596
1597 static bfd_reloc_status_type
ppc_elf_addr16_ha_reloc(bfd * abfd ATTRIBUTE_UNUSED,arelent * reloc_entry,asymbol * symbol,void * data ATTRIBUTE_UNUSED,asection * input_section,bfd * output_bfd,char ** error_message ATTRIBUTE_UNUSED)1598 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1599 arelent *reloc_entry,
1600 asymbol *symbol,
1601 void *data ATTRIBUTE_UNUSED,
1602 asection *input_section,
1603 bfd *output_bfd,
1604 char **error_message ATTRIBUTE_UNUSED)
1605 {
1606 bfd_vma relocation;
1607
1608 if (output_bfd != NULL)
1609 {
1610 reloc_entry->address += input_section->output_offset;
1611 return bfd_reloc_ok;
1612 }
1613
1614 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
1615 return bfd_reloc_outofrange;
1616
1617 if (bfd_is_com_section (symbol->section))
1618 relocation = 0;
1619 else
1620 relocation = symbol->value;
1621
1622 relocation += symbol->section->output_section->vma;
1623 relocation += symbol->section->output_offset;
1624 relocation += reloc_entry->addend;
1625 if (reloc_entry->howto->pc_relative)
1626 relocation -= reloc_entry->address;
1627
1628 reloc_entry->addend += (relocation & 0x8000) << 1;
1629
1630 return bfd_reloc_continue;
1631 }
1632
1633 static bfd_reloc_status_type
ppc_elf_unhandled_reloc(bfd * abfd,arelent * reloc_entry,asymbol * symbol,void * data,asection * input_section,bfd * output_bfd,char ** error_message)1634 ppc_elf_unhandled_reloc (bfd *abfd,
1635 arelent *reloc_entry,
1636 asymbol *symbol,
1637 void *data,
1638 asection *input_section,
1639 bfd *output_bfd,
1640 char **error_message)
1641 {
1642 /* If this is a relocatable link (output_bfd test tells us), just
1643 call the generic function. Any adjustment will be done at final
1644 link time. */
1645 if (output_bfd != NULL)
1646 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1647 input_section, output_bfd, error_message);
1648
1649 if (error_message != NULL)
1650 {
1651 static char buf[60];
1652 sprintf (buf, _("generic linker can't handle %s"),
1653 reloc_entry->howto->name);
1654 *error_message = buf;
1655 }
1656 return bfd_reloc_dangerous;
1657 }
1658
1659 /* Sections created by the linker. */
1660
1661 typedef struct elf_linker_section
1662 {
1663 /* Pointer to the bfd section. */
1664 asection *section;
1665 /* Section name. */
1666 const char *name;
1667 /* Associated bss section name. */
1668 const char *bss_name;
1669 /* Associated symbol name. */
1670 const char *sym_name;
1671 /* Associated symbol. */
1672 struct elf_link_hash_entry *sym;
1673 } elf_linker_section_t;
1674
1675 /* Linked list of allocated pointer entries. This hangs off of the
1676 symbol lists, and provides allows us to return different pointers,
1677 based on different addend's. */
1678
1679 typedef struct elf_linker_section_pointers
1680 {
1681 /* next allocated pointer for this symbol */
1682 struct elf_linker_section_pointers *next;
1683 /* offset of pointer from beginning of section */
1684 bfd_vma offset;
1685 /* addend used */
1686 bfd_vma addend;
1687 /* which linker section this is */
1688 elf_linker_section_t *lsect;
1689 } elf_linker_section_pointers_t;
1690
1691 struct ppc_elf_obj_tdata
1692 {
1693 struct elf_obj_tdata elf;
1694
1695 /* A mapping from local symbols to offsets into the various linker
1696 sections added. This is index by the symbol index. */
1697 elf_linker_section_pointers_t **linker_section_pointers;
1698 };
1699
1700 #define ppc_elf_tdata(bfd) \
1701 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
1702
1703 #define elf_local_ptr_offsets(bfd) \
1704 (ppc_elf_tdata (bfd)->linker_section_pointers)
1705
1706 /* Override the generic function because we store some extras. */
1707
1708 static bfd_boolean
ppc_elf_mkobject(bfd * abfd)1709 ppc_elf_mkobject (bfd *abfd)
1710 {
1711 bfd_size_type amt = sizeof (struct ppc_elf_obj_tdata);
1712 abfd->tdata.any = bfd_zalloc (abfd, amt);
1713 if (abfd->tdata.any == NULL)
1714 return FALSE;
1715 return TRUE;
1716 }
1717
1718 /* Fix bad default arch selected for a 32 bit input bfd when the
1719 default is 64 bit. */
1720
1721 static bfd_boolean
ppc_elf_object_p(bfd * abfd)1722 ppc_elf_object_p (bfd *abfd)
1723 {
1724 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
1725 {
1726 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
1727
1728 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
1729 {
1730 /* Relies on arch after 64 bit default being 32 bit default. */
1731 abfd->arch_info = abfd->arch_info->next;
1732 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
1733 }
1734 }
1735 return TRUE;
1736 }
1737
1738 /* Function to set whether a module needs the -mrelocatable bit set. */
1739
1740 static bfd_boolean
ppc_elf_set_private_flags(bfd * abfd,flagword flags)1741 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
1742 {
1743 BFD_ASSERT (!elf_flags_init (abfd)
1744 || elf_elfheader (abfd)->e_flags == flags);
1745
1746 elf_elfheader (abfd)->e_flags = flags;
1747 elf_flags_init (abfd) = TRUE;
1748 return TRUE;
1749 }
1750
1751 /* Support for core dump NOTE sections. */
1752
1753 static bfd_boolean
ppc_elf_grok_prstatus(bfd * abfd,Elf_Internal_Note * note)1754 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1755 {
1756 int offset;
1757 unsigned int size;
1758
1759 switch (note->descsz)
1760 {
1761 default:
1762 return FALSE;
1763
1764 case 268: /* Linux/PPC. */
1765 /* pr_cursig */
1766 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1767
1768 /* pr_pid */
1769 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1770
1771 /* pr_reg */
1772 offset = 72;
1773 size = 192;
1774
1775 break;
1776 }
1777
1778 /* Make a ".reg/999" section. */
1779 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1780 size, note->descpos + offset);
1781 }
1782
1783 static bfd_boolean
ppc_elf_grok_psinfo(bfd * abfd,Elf_Internal_Note * note)1784 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1785 {
1786 switch (note->descsz)
1787 {
1788 default:
1789 return FALSE;
1790
1791 case 128: /* Linux/PPC elf_prpsinfo. */
1792 elf_tdata (abfd)->core_program
1793 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
1794 elf_tdata (abfd)->core_command
1795 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
1796 }
1797
1798 /* Note that for some reason, a spurious space is tacked
1799 onto the end of the args in some (at least one anyway)
1800 implementations, so strip it off if it exists. */
1801
1802 {
1803 char *command = elf_tdata (abfd)->core_command;
1804 int n = strlen (command);
1805
1806 if (0 < n && command[n - 1] == ' ')
1807 command[n - 1] = '\0';
1808 }
1809
1810 return TRUE;
1811 }
1812
1813 /* Return address for Ith PLT stub in section PLT, for relocation REL
1814 or (bfd_vma) -1 if it should not be included. */
1815
1816 static bfd_vma
ppc_elf_plt_sym_val(bfd_vma i ATTRIBUTE_UNUSED,const asection * plt ATTRIBUTE_UNUSED,const arelent * rel)1817 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
1818 const asection *plt ATTRIBUTE_UNUSED,
1819 const arelent *rel)
1820 {
1821 return rel->address;
1822 }
1823
1824 /* Handle a PowerPC specific section when reading an object file. This
1825 is called when bfd_section_from_shdr finds a section with an unknown
1826 type. */
1827
1828 static bfd_boolean
ppc_elf_section_from_shdr(bfd * abfd,Elf_Internal_Shdr * hdr,const char * name,int shindex)1829 ppc_elf_section_from_shdr (bfd *abfd,
1830 Elf_Internal_Shdr *hdr,
1831 const char *name,
1832 int shindex)
1833 {
1834 asection *newsect;
1835 flagword flags;
1836
1837 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1838 return FALSE;
1839
1840 newsect = hdr->bfd_section;
1841 flags = bfd_get_section_flags (abfd, newsect);
1842 if (hdr->sh_flags & SHF_EXCLUDE)
1843 flags |= SEC_EXCLUDE;
1844
1845 if (hdr->sh_type == SHT_ORDERED)
1846 flags |= SEC_SORT_ENTRIES;
1847
1848 bfd_set_section_flags (abfd, newsect, flags);
1849 return TRUE;
1850 }
1851
1852 /* Set up any other section flags and such that may be necessary. */
1853
1854 static bfd_boolean
ppc_elf_fake_sections(bfd * abfd ATTRIBUTE_UNUSED,Elf_Internal_Shdr * shdr,asection * asect)1855 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1856 Elf_Internal_Shdr *shdr,
1857 asection *asect)
1858 {
1859 if ((asect->flags & (SEC_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE)
1860 shdr->sh_flags |= SHF_EXCLUDE;
1861
1862 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
1863 shdr->sh_type = SHT_ORDERED;
1864
1865 return TRUE;
1866 }
1867
1868 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
1869 need to bump up the number of section headers. */
1870
1871 static int
ppc_elf_additional_program_headers(bfd * abfd)1872 ppc_elf_additional_program_headers (bfd *abfd)
1873 {
1874 asection *s;
1875 int ret = 0;
1876
1877 s = bfd_get_section_by_name (abfd, ".sbss2");
1878 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1879 ++ret;
1880
1881 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
1882 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1883 ++ret;
1884
1885 return ret;
1886 }
1887
1888 /* Add extra PPC sections -- Note, for now, make .sbss2 and
1889 .PPC.EMB.sbss0 a normal section, and not a bss section so
1890 that the linker doesn't crater when trying to make more than
1891 2 sections. */
1892
1893 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
1894 {
1895 { ".plt", 4, 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
1896 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
1897 { ".sbss2", 6, -2, SHT_PROGBITS, SHF_ALLOC },
1898 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1899 { ".sdata2", 7, -2, SHT_PROGBITS, SHF_ALLOC },
1900 { ".tags", 5, 0, SHT_ORDERED, SHF_ALLOC },
1901 { ".PPC.EMB.apuinfo", 16, 0, SHT_NOTE, 0 },
1902 { ".PPC.EMB.sbss0", 14, 0, SHT_PROGBITS, SHF_ALLOC },
1903 { ".PPC.EMB.sdata0", 15, 0, SHT_PROGBITS, SHF_ALLOC },
1904 { NULL, 0, 0, 0, 0 }
1905 };
1906
1907 /* This is what we want for new plt/got. */
1908 static struct bfd_elf_special_section ppc_alt_plt =
1909 { ".plt", 4, 0, SHT_PROGBITS, SHF_ALLOC };
1910
1911 static const struct bfd_elf_special_section *
ppc_elf_get_sec_type_attr(bfd * abfd ATTRIBUTE_UNUSED,asection * sec)1912 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
1913 {
1914 const struct bfd_elf_special_section *ssect;
1915
1916 /* See if this is one of the special sections. */
1917 if (sec->name == NULL)
1918 return NULL;
1919
1920 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
1921 sec->use_rela_p);
1922 if (ssect != NULL)
1923 {
1924 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
1925 ssect = &ppc_alt_plt;
1926 return ssect;
1927 }
1928
1929 return _bfd_elf_get_sec_type_attr (abfd, sec);
1930 }
1931
1932 /* Very simple linked list structure for recording apuinfo values. */
1933 typedef struct apuinfo_list
1934 {
1935 struct apuinfo_list *next;
1936 unsigned long value;
1937 }
1938 apuinfo_list;
1939
1940 static apuinfo_list *head;
1941
1942
1943 static void
apuinfo_list_init(void)1944 apuinfo_list_init (void)
1945 {
1946 head = NULL;
1947 }
1948
1949 static void
apuinfo_list_add(unsigned long value)1950 apuinfo_list_add (unsigned long value)
1951 {
1952 apuinfo_list *entry = head;
1953
1954 while (entry != NULL)
1955 {
1956 if (entry->value == value)
1957 return;
1958 entry = entry->next;
1959 }
1960
1961 entry = bfd_malloc (sizeof (* entry));
1962 if (entry == NULL)
1963 return;
1964
1965 entry->value = value;
1966 entry->next = head;
1967 head = entry;
1968 }
1969
1970 static unsigned
apuinfo_list_length(void)1971 apuinfo_list_length (void)
1972 {
1973 apuinfo_list *entry;
1974 unsigned long count;
1975
1976 for (entry = head, count = 0;
1977 entry;
1978 entry = entry->next)
1979 ++ count;
1980
1981 return count;
1982 }
1983
1984 static inline unsigned long
apuinfo_list_element(unsigned long number)1985 apuinfo_list_element (unsigned long number)
1986 {
1987 apuinfo_list * entry;
1988
1989 for (entry = head;
1990 entry && number --;
1991 entry = entry->next)
1992 ;
1993
1994 return entry ? entry->value : 0;
1995 }
1996
1997 static void
apuinfo_list_finish(void)1998 apuinfo_list_finish (void)
1999 {
2000 apuinfo_list *entry;
2001
2002 for (entry = head; entry;)
2003 {
2004 apuinfo_list *next = entry->next;
2005 free (entry);
2006 entry = next;
2007 }
2008
2009 head = NULL;
2010 }
2011
2012 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2013 #define APUINFO_LABEL "APUinfo"
2014
2015 /* Scan the input BFDs and create a linked list of
2016 the APUinfo values that will need to be emitted. */
2017
2018 static void
ppc_elf_begin_write_processing(bfd * abfd,struct bfd_link_info * link_info)2019 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2020 {
2021 bfd *ibfd;
2022 asection *asec;
2023 char *buffer;
2024 unsigned num_input_sections;
2025 bfd_size_type output_section_size;
2026 unsigned i;
2027 unsigned num_entries;
2028 unsigned long offset;
2029 unsigned long length;
2030 const char *error_message = NULL;
2031
2032 if (link_info == NULL)
2033 return;
2034
2035 /* Scan the input bfds, looking for apuinfo sections. */
2036 num_input_sections = 0;
2037 output_section_size = 0;
2038
2039 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2040 {
2041 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2042 if (asec)
2043 {
2044 ++ num_input_sections;
2045 output_section_size += asec->size;
2046 }
2047 }
2048
2049 /* We need at least one input sections
2050 in order to make merging worthwhile. */
2051 if (num_input_sections < 1)
2052 return;
2053
2054 /* Just make sure that the output section exists as well. */
2055 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2056 if (asec == NULL)
2057 return;
2058
2059 /* Allocate a buffer for the contents of the input sections. */
2060 buffer = bfd_malloc (output_section_size);
2061 if (buffer == NULL)
2062 return;
2063
2064 offset = 0;
2065 apuinfo_list_init ();
2066
2067 /* Read in the input sections contents. */
2068 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2069 {
2070 unsigned long datum;
2071 char *ptr;
2072
2073 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2074 if (asec == NULL)
2075 continue;
2076
2077 length = asec->size;
2078 if (length < 24)
2079 {
2080 error_message = _("corrupt or empty %s section in %B");
2081 goto fail;
2082 }
2083
2084 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2085 || (bfd_bread (buffer + offset, length, ibfd) != length))
2086 {
2087 error_message = _("unable to read in %s section from %B");
2088 goto fail;
2089 }
2090
2091 /* Process the contents of the section. */
2092 ptr = buffer + offset;
2093 error_message = _("corrupt %s section in %B");
2094
2095 /* Verify the contents of the header. Note - we have to
2096 extract the values this way in order to allow for a
2097 host whose endian-ness is different from the target. */
2098 datum = bfd_get_32 (ibfd, ptr);
2099 if (datum != sizeof APUINFO_LABEL)
2100 goto fail;
2101
2102 datum = bfd_get_32 (ibfd, ptr + 8);
2103 if (datum != 0x2)
2104 goto fail;
2105
2106 if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
2107 goto fail;
2108
2109 /* Get the number of bytes used for apuinfo entries. */
2110 datum = bfd_get_32 (ibfd, ptr + 4);
2111 if (datum + 20 != length)
2112 goto fail;
2113
2114 /* Make sure that we do not run off the end of the section. */
2115 if (offset + length > output_section_size)
2116 goto fail;
2117
2118 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2119 for (i = 0; i < datum; i += 4)
2120 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
2121
2122 /* Update the offset. */
2123 offset += length;
2124 }
2125
2126 error_message = NULL;
2127
2128 /* Compute the size of the output section. */
2129 num_entries = apuinfo_list_length ();
2130 output_section_size = 20 + num_entries * 4;
2131
2132 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2133
2134 if (! bfd_set_section_size (abfd, asec, output_section_size))
2135 ibfd = abfd,
2136 error_message = _("warning: unable to set size of %s section in %B");
2137
2138 fail:
2139 free (buffer);
2140
2141 if (error_message)
2142 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2143 }
2144
2145 /* Prevent the output section from accumulating the input sections'
2146 contents. We have already stored this in our linked list structure. */
2147
2148 static bfd_boolean
ppc_elf_write_section(bfd * abfd ATTRIBUTE_UNUSED,asection * asec,bfd_byte * contents ATTRIBUTE_UNUSED)2149 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2150 asection *asec,
2151 bfd_byte *contents ATTRIBUTE_UNUSED)
2152 {
2153 return (apuinfo_list_length ()
2154 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
2155 }
2156
2157 /* Finally we can generate the output section. */
2158
2159 static void
ppc_elf_final_write_processing(bfd * abfd,bfd_boolean linker ATTRIBUTE_UNUSED)2160 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2161 {
2162 bfd_byte *buffer;
2163 asection *asec;
2164 unsigned i;
2165 unsigned num_entries;
2166 bfd_size_type length;
2167
2168 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2169 if (asec == NULL)
2170 return;
2171
2172 if (apuinfo_list_length () == 0)
2173 return;
2174
2175 length = asec->size;
2176 if (length < 20)
2177 return;
2178
2179 buffer = bfd_malloc (length);
2180 if (buffer == NULL)
2181 {
2182 (*_bfd_error_handler)
2183 (_("failed to allocate space for new APUinfo section."));
2184 return;
2185 }
2186
2187 /* Create the apuinfo header. */
2188 num_entries = apuinfo_list_length ();
2189 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2190 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2191 bfd_put_32 (abfd, 0x2, buffer + 8);
2192 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2193
2194 length = 20;
2195 for (i = 0; i < num_entries; i++)
2196 {
2197 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2198 length += 4;
2199 }
2200
2201 if (length != asec->size)
2202 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2203
2204 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2205 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2206
2207 free (buffer);
2208
2209 apuinfo_list_finish ();
2210 }
2211
2212 /* The following functions are specific to the ELF linker, while
2213 functions above are used generally. They appear in this file more
2214 or less in the order in which they are called. eg.
2215 ppc_elf_check_relocs is called early in the link process,
2216 ppc_elf_finish_dynamic_sections is one of the last functions
2217 called. */
2218
2219 /* The PPC linker needs to keep track of the number of relocs that it
2220 decides to copy as dynamic relocs in check_relocs for each symbol.
2221 This is so that it can later discard them if they are found to be
2222 unnecessary. We store the information in a field extending the
2223 regular ELF linker hash table. */
2224
2225 struct ppc_elf_dyn_relocs
2226 {
2227 struct ppc_elf_dyn_relocs *next;
2228
2229 /* The input section of the reloc. */
2230 asection *sec;
2231
2232 /* Total number of relocs copied for the input section. */
2233 bfd_size_type count;
2234
2235 /* Number of pc-relative relocs copied for the input section. */
2236 bfd_size_type pc_count;
2237 };
2238
2239 /* Track PLT entries needed for a given symbol. We might need more
2240 than one glink entry per symbol. */
2241 struct plt_entry
2242 {
2243 struct plt_entry *next;
2244
2245 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
2246 This field stores the offset into .got2 used to initialise the
2247 GOT pointer reg. It will always be at least 32768 (and for
2248 current gcc this is the only offset used). */
2249 bfd_vma addend;
2250
2251 /* The .got2 section. */
2252 asection *sec;
2253
2254 /* PLT refcount or offset. */
2255 union
2256 {
2257 bfd_signed_vma refcount;
2258 bfd_vma offset;
2259 } plt;
2260
2261 /* .glink stub offset. */
2262 bfd_vma glink_offset;
2263 };
2264
2265 /* Of those relocs that might be copied as dynamic relocs, this macro
2266 selects those that must be copied when linking a shared library,
2267 even when the symbol is local. */
2268
2269 #define MUST_BE_DYN_RELOC(RTYPE) \
2270 ((RTYPE) != R_PPC_REL24 \
2271 && (RTYPE) != R_PPC_REL14 \
2272 && (RTYPE) != R_PPC_REL14_BRTAKEN \
2273 && (RTYPE) != R_PPC_REL14_BRNTAKEN \
2274 && (RTYPE) != R_PPC_REL32)
2275
2276 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2277 copying dynamic variables from a shared lib into an app's dynbss
2278 section, and instead use a dynamic relocation to point into the
2279 shared lib. */
2280 #define ELIMINATE_COPY_RELOCS 1
2281
2282 /* PPC ELF linker hash entry. */
2283
2284 struct ppc_elf_link_hash_entry
2285 {
2286 struct elf_link_hash_entry elf;
2287
2288 /* If this symbol is used in the linker created sections, the processor
2289 specific backend uses this field to map the field into the offset
2290 from the beginning of the section. */
2291 elf_linker_section_pointers_t *linker_section_pointer;
2292
2293 /* Track dynamic relocs copied for this symbol. */
2294 struct ppc_elf_dyn_relocs *dyn_relocs;
2295
2296 /* Contexts in which symbol is used in the GOT (or TOC).
2297 TLS_GD .. TLS_TLS bits are or'd into the mask as the
2298 corresponding relocs are encountered during check_relocs.
2299 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2300 indicate the corresponding GOT entry type is not needed. */
2301 #define TLS_GD 1 /* GD reloc. */
2302 #define TLS_LD 2 /* LD reloc. */
2303 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2304 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2305 #define TLS_TLS 16 /* Any TLS reloc. */
2306 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
2307 char tls_mask;
2308
2309 /* Nonzero if we have seen a small data relocation referring to this
2310 symbol. */
2311 unsigned char has_sda_refs;
2312 };
2313
2314 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
2315
2316 enum ppc_elf_plt_type {
2317 PLT_UNSET,
2318 PLT_OLD,
2319 PLT_NEW,
2320 PLT_VXWORKS
2321 };
2322
2323 /* PPC ELF linker hash table. */
2324
2325 struct ppc_elf_link_hash_table
2326 {
2327 struct elf_link_hash_table elf;
2328
2329 /* Short-cuts to get to dynamic linker sections. */
2330 asection *got;
2331 asection *relgot;
2332 asection *glink;
2333 asection *plt;
2334 asection *relplt;
2335 asection *dynbss;
2336 asection *relbss;
2337 asection *dynsbss;
2338 asection *relsbss;
2339 elf_linker_section_t sdata[2];
2340 asection *sbss;
2341
2342 /* Shortcut to .__tls_get_addr. */
2343 struct elf_link_hash_entry *tls_get_addr;
2344
2345 /* TLS local dynamic got entry handling. */
2346 union {
2347 bfd_signed_vma refcount;
2348 bfd_vma offset;
2349 } tlsld_got;
2350
2351 /* Offset of PltResolve function in glink. */
2352 bfd_vma glink_pltresolve;
2353
2354 /* Size of reserved GOT entries. */
2355 unsigned int got_header_size;
2356 /* Non-zero if allocating the header left a gap. */
2357 unsigned int got_gap;
2358
2359 /* The type of PLT we have chosen to use. */
2360 enum ppc_elf_plt_type plt_type;
2361
2362 /* Whether we can use the new PLT layout. */
2363 unsigned int can_use_new_plt:1;
2364
2365 /* Set if we should emit symbols for stubs. */
2366 unsigned int emit_stub_syms:1;
2367
2368 /* Small local sym to section mapping cache. */
2369 struct sym_sec_cache sym_sec;
2370
2371 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
2372 asection *srelplt2;
2373
2374 /* The .got.plt section (VxWorks only)*/
2375 asection *sgotplt;
2376
2377 /* True if the target system is VxWorks. */
2378 int is_vxworks;
2379
2380 /* The size of PLT entries. */
2381 int plt_entry_size;
2382 /* The distance between adjacent PLT slots. */
2383 int plt_slot_size;
2384 /* The size of the first PLT entry. */
2385 int plt_initial_entry_size;
2386 };
2387
2388 /* Get the PPC ELF linker hash table from a link_info structure. */
2389
2390 #define ppc_elf_hash_table(p) \
2391 ((struct ppc_elf_link_hash_table *) (p)->hash)
2392
2393 /* Create an entry in a PPC ELF linker hash table. */
2394
2395 static struct bfd_hash_entry *
ppc_elf_link_hash_newfunc(struct bfd_hash_entry * entry,struct bfd_hash_table * table,const char * string)2396 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2397 struct bfd_hash_table *table,
2398 const char *string)
2399 {
2400 /* Allocate the structure if it has not already been allocated by a
2401 subclass. */
2402 if (entry == NULL)
2403 {
2404 entry = bfd_hash_allocate (table,
2405 sizeof (struct ppc_elf_link_hash_entry));
2406 if (entry == NULL)
2407 return entry;
2408 }
2409
2410 /* Call the allocation method of the superclass. */
2411 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2412 if (entry != NULL)
2413 {
2414 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
2415 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
2416 ppc_elf_hash_entry (entry)->tls_mask = 0;
2417 }
2418
2419 return entry;
2420 }
2421
2422 /* Create a PPC ELF linker hash table. */
2423
2424 static struct bfd_link_hash_table *
ppc_elf_link_hash_table_create(bfd * abfd)2425 ppc_elf_link_hash_table_create (bfd *abfd)
2426 {
2427 struct ppc_elf_link_hash_table *ret;
2428
2429 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
2430 if (ret == NULL)
2431 return NULL;
2432
2433 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
2434 ppc_elf_link_hash_newfunc,
2435 sizeof (struct ppc_elf_link_hash_entry)))
2436 {
2437 free (ret);
2438 return NULL;
2439 }
2440
2441 ret->elf.init_plt_refcount.refcount = 0;
2442 ret->elf.init_plt_refcount.glist = NULL;
2443 ret->elf.init_plt_offset.offset = 0;
2444 ret->elf.init_plt_offset.glist = NULL;
2445
2446 ret->sdata[0].name = ".sdata";
2447 ret->sdata[0].sym_name = "_SDA_BASE_";
2448 ret->sdata[0].bss_name = ".sbss";
2449
2450 ret->sdata[1].name = ".sdata2";
2451 ret->sdata[1].sym_name = "_SDA2_BASE_";
2452 ret->sdata[1].bss_name = ".sbss2";
2453
2454 ret->plt_entry_size = 12;
2455 ret->plt_slot_size = 8;
2456 ret->plt_initial_entry_size = 72;
2457
2458 ret->is_vxworks = 0;
2459
2460 return &ret->elf.root;
2461 }
2462
2463 /* Create .got and the related sections. */
2464
2465 static bfd_boolean
ppc_elf_create_got(bfd * abfd,struct bfd_link_info * info)2466 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2467 {
2468 struct ppc_elf_link_hash_table *htab;
2469 asection *s;
2470 flagword flags;
2471
2472 if (!_bfd_elf_create_got_section (abfd, info))
2473 return FALSE;
2474
2475 htab = ppc_elf_hash_table (info);
2476 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2477 if (s == NULL)
2478 abort ();
2479
2480 if (htab->is_vxworks)
2481 {
2482 htab->sgotplt = bfd_get_section_by_name (abfd, ".got.plt");
2483 if (!htab->sgotplt)
2484 abort ();
2485 }
2486 else
2487 {
2488 /* The powerpc .got has a blrl instruction in it. Mark it
2489 executable. */
2490 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
2491 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2492 if (!bfd_set_section_flags (abfd, s, flags))
2493 return FALSE;
2494 }
2495
2496 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2497 | SEC_LINKER_CREATED | SEC_READONLY);
2498 htab->relgot = bfd_make_section_with_flags (abfd, ".rela.got", flags);
2499 if (!htab->relgot
2500 || ! bfd_set_section_alignment (abfd, htab->relgot, 2))
2501 return FALSE;
2502
2503 return TRUE;
2504 }
2505
2506 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2507 to output sections (just like _bfd_elf_create_dynamic_sections has
2508 to create .dynbss and .rela.bss). */
2509
2510 static bfd_boolean
ppc_elf_create_dynamic_sections(bfd * abfd,struct bfd_link_info * info)2511 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2512 {
2513 struct ppc_elf_link_hash_table *htab;
2514 asection *s;
2515 flagword flags;
2516
2517 htab = ppc_elf_hash_table (info);
2518
2519 if (htab->got == NULL
2520 && !ppc_elf_create_got (abfd, info))
2521 return FALSE;
2522
2523 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2524 return FALSE;
2525
2526 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2527 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2528
2529 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags | SEC_CODE);
2530 htab->glink = s;
2531 if (s == NULL
2532 || !bfd_set_section_alignment (abfd, s, 4))
2533 return FALSE;
2534
2535 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2536 s = bfd_make_section_with_flags (abfd, ".dynsbss",
2537 SEC_ALLOC | SEC_LINKER_CREATED);
2538 htab->dynsbss = s;
2539 if (s == NULL)
2540 return FALSE;
2541
2542 if (! info->shared)
2543 {
2544 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2545 s = bfd_make_section_with_flags (abfd, ".rela.sbss", flags);
2546 htab->relsbss = s;
2547 if (s == NULL
2548 || ! bfd_set_section_alignment (abfd, s, 2))
2549 return FALSE;
2550 }
2551
2552 if (htab->is_vxworks
2553 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
2554 return FALSE;
2555
2556 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2557 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2558 if (s == NULL)
2559 abort ();
2560
2561 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
2562 if (htab->plt_type == PLT_VXWORKS)
2563 /* The VxWorks PLT is a loaded section with contents. */
2564 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
2565 return bfd_set_section_flags (abfd, s, flags);
2566 }
2567
2568 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2569
2570 static void
ppc_elf_copy_indirect_symbol(struct bfd_link_info * info,struct elf_link_hash_entry * dir,struct elf_link_hash_entry * ind)2571 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
2572 struct elf_link_hash_entry *dir,
2573 struct elf_link_hash_entry *ind)
2574 {
2575 struct ppc_elf_link_hash_entry *edir, *eind;
2576
2577 edir = (struct ppc_elf_link_hash_entry *) dir;
2578 eind = (struct ppc_elf_link_hash_entry *) ind;
2579
2580 if (eind->dyn_relocs != NULL)
2581 {
2582 if (edir->dyn_relocs != NULL)
2583 {
2584 struct ppc_elf_dyn_relocs **pp;
2585 struct ppc_elf_dyn_relocs *p;
2586
2587 /* Add reloc counts against the indirect sym to the direct sym
2588 list. Merge any entries against the same section. */
2589 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2590 {
2591 struct ppc_elf_dyn_relocs *q;
2592
2593 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2594 if (q->sec == p->sec)
2595 {
2596 q->pc_count += p->pc_count;
2597 q->count += p->count;
2598 *pp = p->next;
2599 break;
2600 }
2601 if (q == NULL)
2602 pp = &p->next;
2603 }
2604 *pp = edir->dyn_relocs;
2605 }
2606
2607 edir->dyn_relocs = eind->dyn_relocs;
2608 eind->dyn_relocs = NULL;
2609 }
2610
2611 edir->tls_mask |= eind->tls_mask;
2612 edir->has_sda_refs |= eind->has_sda_refs;
2613
2614 /* If called to transfer flags for a weakdef during processing
2615 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
2616 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
2617 if (!(ELIMINATE_COPY_RELOCS
2618 && eind->elf.root.type != bfd_link_hash_indirect
2619 && edir->elf.dynamic_adjusted))
2620 edir->elf.non_got_ref |= eind->elf.non_got_ref;
2621
2622 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
2623 edir->elf.ref_regular |= eind->elf.ref_regular;
2624 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
2625 edir->elf.needs_plt |= eind->elf.needs_plt;
2626
2627 /* If we were called to copy over info for a weak sym, that's all. */
2628 if (eind->elf.root.type != bfd_link_hash_indirect)
2629 return;
2630
2631 /* Copy over the GOT refcount entries that we may have already seen to
2632 the symbol which just became indirect. */
2633 edir->elf.got.refcount += eind->elf.got.refcount;
2634 eind->elf.got.refcount = 0;
2635
2636 /* And plt entries. */
2637 if (eind->elf.plt.plist != NULL)
2638 {
2639 if (edir->elf.plt.plist != NULL)
2640 {
2641 struct plt_entry **entp;
2642 struct plt_entry *ent;
2643
2644 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
2645 {
2646 struct plt_entry *dent;
2647
2648 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
2649 if (dent->sec == ent->sec && dent->addend == ent->addend)
2650 {
2651 dent->plt.refcount += ent->plt.refcount;
2652 *entp = ent->next;
2653 break;
2654 }
2655 if (dent == NULL)
2656 entp = &ent->next;
2657 }
2658 *entp = edir->elf.plt.plist;
2659 }
2660
2661 edir->elf.plt.plist = eind->elf.plt.plist;
2662 eind->elf.plt.plist = NULL;
2663 }
2664
2665 if (eind->elf.dynindx != -1)
2666 {
2667 if (edir->elf.dynindx != -1)
2668 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
2669 edir->elf.dynstr_index);
2670 edir->elf.dynindx = eind->elf.dynindx;
2671 edir->elf.dynstr_index = eind->elf.dynstr_index;
2672 eind->elf.dynindx = -1;
2673 eind->elf.dynstr_index = 0;
2674 }
2675 }
2676
2677 /* Return 1 if target is one of ours. */
2678
2679 static bfd_boolean
is_ppc_elf_target(const struct bfd_target * targ)2680 is_ppc_elf_target (const struct bfd_target *targ)
2681 {
2682 extern const bfd_target bfd_elf32_powerpc_vec;
2683 extern const bfd_target bfd_elf32_powerpc_vxworks_vec;
2684 extern const bfd_target bfd_elf32_powerpcle_vec;
2685
2686 return (targ == &bfd_elf32_powerpc_vec
2687 || targ == &bfd_elf32_powerpc_vxworks_vec
2688 || targ == &bfd_elf32_powerpcle_vec);
2689 }
2690
2691 /* Hook called by the linker routine which adds symbols from an object
2692 file. We use it to put .comm items in .sbss, and not .bss. */
2693
2694 static bfd_boolean
ppc_elf_add_symbol_hook(bfd * abfd,struct bfd_link_info * info,Elf_Internal_Sym * sym,const char ** namep ATTRIBUTE_UNUSED,flagword * flagsp ATTRIBUTE_UNUSED,asection ** secp,bfd_vma * valp)2695 ppc_elf_add_symbol_hook (bfd *abfd,
2696 struct bfd_link_info *info,
2697 Elf_Internal_Sym *sym,
2698 const char **namep ATTRIBUTE_UNUSED,
2699 flagword *flagsp ATTRIBUTE_UNUSED,
2700 asection **secp,
2701 bfd_vma *valp)
2702 {
2703 if (sym->st_shndx == SHN_COMMON
2704 && !info->relocatable
2705 && sym->st_size <= elf_gp_size (abfd)
2706 && is_ppc_elf_target (info->hash->creator))
2707 {
2708 /* Common symbols less than or equal to -G nn bytes are automatically
2709 put into .sbss. */
2710 struct ppc_elf_link_hash_table *htab;
2711
2712 htab = ppc_elf_hash_table (info);
2713 if (htab->sbss == NULL)
2714 {
2715 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
2716
2717 if (!htab->elf.dynobj)
2718 htab->elf.dynobj = abfd;
2719
2720 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2721 ".sbss",
2722 flags);
2723 if (htab->sbss == NULL)
2724 return FALSE;
2725 }
2726
2727 *secp = htab->sbss;
2728 *valp = sym->st_size;
2729 }
2730
2731 return TRUE;
2732 }
2733
2734 static bfd_boolean
create_sdata_sym(struct ppc_elf_link_hash_table * htab,elf_linker_section_t * lsect)2735 create_sdata_sym (struct ppc_elf_link_hash_table *htab,
2736 elf_linker_section_t *lsect)
2737 {
2738 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
2739 TRUE, FALSE, TRUE);
2740 if (lsect->sym == NULL)
2741 return FALSE;
2742 if (lsect->sym->root.type == bfd_link_hash_new)
2743 lsect->sym->non_elf = 0;
2744 lsect->sym->ref_regular = 1;
2745 return TRUE;
2746 }
2747
2748 /* Create a special linker section. */
2749
2750 static bfd_boolean
ppc_elf_create_linker_section(bfd * abfd,struct bfd_link_info * info,flagword flags,elf_linker_section_t * lsect)2751 ppc_elf_create_linker_section (bfd *abfd,
2752 struct bfd_link_info *info,
2753 flagword flags,
2754 elf_linker_section_t *lsect)
2755 {
2756 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2757 asection *s;
2758
2759 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2760 | SEC_LINKER_CREATED);
2761
2762 /* Record the first bfd that needs the special sections. */
2763 if (!htab->elf.dynobj)
2764 htab->elf.dynobj = abfd;
2765
2766 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2767 lsect->name,
2768 flags);
2769 if (s == NULL
2770 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2771 return FALSE;
2772 lsect->section = s;
2773
2774 return create_sdata_sym (htab, lsect);
2775 }
2776
2777 /* Find a linker generated pointer with a given addend and type. */
2778
2779 static elf_linker_section_pointers_t *
elf_find_pointer_linker_section(elf_linker_section_pointers_t * linker_pointers,bfd_vma addend,elf_linker_section_t * lsect)2780 elf_find_pointer_linker_section
2781 (elf_linker_section_pointers_t *linker_pointers,
2782 bfd_vma addend,
2783 elf_linker_section_t *lsect)
2784 {
2785 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
2786 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
2787 return linker_pointers;
2788
2789 return NULL;
2790 }
2791
2792 /* Allocate a pointer to live in a linker created section. */
2793
2794 static bfd_boolean
elf_create_pointer_linker_section(bfd * abfd,elf_linker_section_t * lsect,struct elf_link_hash_entry * h,const Elf_Internal_Rela * rel)2795 elf_create_pointer_linker_section (bfd *abfd,
2796 elf_linker_section_t *lsect,
2797 struct elf_link_hash_entry *h,
2798 const Elf_Internal_Rela *rel)
2799 {
2800 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
2801 elf_linker_section_pointers_t *linker_section_ptr;
2802 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2803 bfd_size_type amt;
2804
2805 BFD_ASSERT (lsect != NULL);
2806
2807 /* Is this a global symbol? */
2808 if (h != NULL)
2809 {
2810 struct ppc_elf_link_hash_entry *eh;
2811
2812 /* Has this symbol already been allocated? If so, our work is done. */
2813 eh = (struct ppc_elf_link_hash_entry *) h;
2814 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
2815 rel->r_addend,
2816 lsect))
2817 return TRUE;
2818
2819 ptr_linker_section_ptr = &eh->linker_section_pointer;
2820 }
2821 else
2822 {
2823 /* Allocation of a pointer to a local symbol. */
2824 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
2825
2826 /* Allocate a table to hold the local symbols if first time. */
2827 if (!ptr)
2828 {
2829 unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info;
2830
2831 amt = num_symbols;
2832 amt *= sizeof (elf_linker_section_pointers_t *);
2833 ptr = bfd_zalloc (abfd, amt);
2834
2835 if (!ptr)
2836 return FALSE;
2837
2838 elf_local_ptr_offsets (abfd) = ptr;
2839 }
2840
2841 /* Has this symbol already been allocated? If so, our work is done. */
2842 if (elf_find_pointer_linker_section (ptr[r_symndx],
2843 rel->r_addend,
2844 lsect))
2845 return TRUE;
2846
2847 ptr_linker_section_ptr = &ptr[r_symndx];
2848 }
2849
2850 /* Allocate space for a pointer in the linker section, and allocate
2851 a new pointer record from internal memory. */
2852 BFD_ASSERT (ptr_linker_section_ptr != NULL);
2853 amt = sizeof (elf_linker_section_pointers_t);
2854 linker_section_ptr = bfd_alloc (abfd, amt);
2855
2856 if (!linker_section_ptr)
2857 return FALSE;
2858
2859 linker_section_ptr->next = *ptr_linker_section_ptr;
2860 linker_section_ptr->addend = rel->r_addend;
2861 linker_section_ptr->lsect = lsect;
2862 *ptr_linker_section_ptr = linker_section_ptr;
2863
2864 linker_section_ptr->offset = lsect->section->size;
2865 lsect->section->size += 4;
2866
2867 #ifdef DEBUG
2868 fprintf (stderr,
2869 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
2870 lsect->name, (long) linker_section_ptr->offset,
2871 (long) lsect->section->size);
2872 #endif
2873
2874 return TRUE;
2875 }
2876
2877 static bfd_boolean
update_local_sym_info(bfd * abfd,Elf_Internal_Shdr * symtab_hdr,unsigned long r_symndx,int tls_type)2878 update_local_sym_info (bfd *abfd,
2879 Elf_Internal_Shdr *symtab_hdr,
2880 unsigned long r_symndx,
2881 int tls_type)
2882 {
2883 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
2884 char *local_got_tls_masks;
2885
2886 if (local_got_refcounts == NULL)
2887 {
2888 bfd_size_type size = symtab_hdr->sh_info;
2889
2890 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
2891 local_got_refcounts = bfd_zalloc (abfd, size);
2892 if (local_got_refcounts == NULL)
2893 return FALSE;
2894 elf_local_got_refcounts (abfd) = local_got_refcounts;
2895 }
2896
2897 local_got_refcounts[r_symndx] += 1;
2898 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
2899 local_got_tls_masks[r_symndx] |= tls_type;
2900 return TRUE;
2901 }
2902
2903 static bfd_boolean
update_plt_info(bfd * abfd,struct elf_link_hash_entry * h,asection * sec,bfd_vma addend)2904 update_plt_info (bfd *abfd, struct elf_link_hash_entry *h,
2905 asection *sec, bfd_vma addend)
2906 {
2907 struct plt_entry *ent;
2908
2909 if (addend < 32768)
2910 sec = NULL;
2911 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
2912 if (ent->sec == sec && ent->addend == addend)
2913 break;
2914 if (ent == NULL)
2915 {
2916 bfd_size_type amt = sizeof (*ent);
2917 ent = bfd_alloc (abfd, amt);
2918 if (ent == NULL)
2919 return FALSE;
2920 ent->next = h->plt.plist;
2921 ent->sec = sec;
2922 ent->addend = addend;
2923 ent->plt.refcount = 0;
2924 h->plt.plist = ent;
2925 }
2926 ent->plt.refcount += 1;
2927 return TRUE;
2928 }
2929
2930 static struct plt_entry *
find_plt_ent(struct elf_link_hash_entry * h,asection * sec,bfd_vma addend)2931 find_plt_ent (struct elf_link_hash_entry *h, asection *sec, bfd_vma addend)
2932 {
2933 struct plt_entry *ent;
2934
2935 if (addend < 32768)
2936 sec = NULL;
2937 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
2938 if (ent->sec == sec && ent->addend == addend)
2939 break;
2940 return ent;
2941 }
2942
2943 static void
bad_shared_reloc(bfd * abfd,enum elf_ppc_reloc_type r_type)2944 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
2945 {
2946 (*_bfd_error_handler)
2947 (_("%B: relocation %s cannot be used when making a shared object"),
2948 abfd,
2949 ppc_elf_howto_table[r_type]->name);
2950 bfd_set_error (bfd_error_bad_value);
2951 }
2952
2953 /* Look through the relocs for a section during the first phase, and
2954 allocate space in the global offset table or procedure linkage
2955 table. */
2956
2957 static bfd_boolean
ppc_elf_check_relocs(bfd * abfd,struct bfd_link_info * info,asection * sec,const Elf_Internal_Rela * relocs)2958 ppc_elf_check_relocs (bfd *abfd,
2959 struct bfd_link_info *info,
2960 asection *sec,
2961 const Elf_Internal_Rela *relocs)
2962 {
2963 struct ppc_elf_link_hash_table *htab;
2964 Elf_Internal_Shdr *symtab_hdr;
2965 struct elf_link_hash_entry **sym_hashes;
2966 const Elf_Internal_Rela *rel;
2967 const Elf_Internal_Rela *rel_end;
2968 asection *got2, *sreloc;
2969
2970 if (info->relocatable)
2971 return TRUE;
2972
2973 /* Don't do anything special with non-loaded, non-alloced sections.
2974 In particular, any relocs in such sections should not affect GOT
2975 and PLT reference counting (ie. we don't allow them to create GOT
2976 or PLT entries), there's no possibility or desire to optimize TLS
2977 relocs, and there's not much point in propagating relocs to shared
2978 libs that the dynamic linker won't relocate. */
2979 if ((sec->flags & SEC_ALLOC) == 0)
2980 return TRUE;
2981
2982 #ifdef DEBUG
2983 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
2984 sec, abfd);
2985 #endif
2986
2987 /* Initialize howto table if not already done. */
2988 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2989 ppc_elf_howto_init ();
2990
2991 htab = ppc_elf_hash_table (info);
2992 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2993 sym_hashes = elf_sym_hashes (abfd);
2994 got2 = bfd_get_section_by_name (abfd, ".got2");
2995 sreloc = NULL;
2996
2997 rel_end = relocs + sec->reloc_count;
2998 for (rel = relocs; rel < rel_end; rel++)
2999 {
3000 unsigned long r_symndx;
3001 enum elf_ppc_reloc_type r_type;
3002 struct elf_link_hash_entry *h;
3003 int tls_type = 0;
3004
3005 r_symndx = ELF32_R_SYM (rel->r_info);
3006 if (r_symndx < symtab_hdr->sh_info)
3007 h = NULL;
3008 else
3009 {
3010 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3011 while (h->root.type == bfd_link_hash_indirect
3012 || h->root.type == bfd_link_hash_warning)
3013 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3014 }
3015
3016 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3017 This shows up in particular in an R_PPC_ADDR32 in the eabi
3018 startup code. */
3019 if (h != NULL
3020 && htab->got == NULL
3021 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3022 {
3023 if (htab->elf.dynobj == NULL)
3024 htab->elf.dynobj = abfd;
3025 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3026 return FALSE;
3027 BFD_ASSERT (h == htab->elf.hgot);
3028 }
3029
3030 r_type = ELF32_R_TYPE (rel->r_info);
3031 switch (r_type)
3032 {
3033 case R_PPC_GOT_TLSLD16:
3034 case R_PPC_GOT_TLSLD16_LO:
3035 case R_PPC_GOT_TLSLD16_HI:
3036 case R_PPC_GOT_TLSLD16_HA:
3037 htab->tlsld_got.refcount += 1;
3038 tls_type = TLS_TLS | TLS_LD;
3039 goto dogottls;
3040
3041 case R_PPC_GOT_TLSGD16:
3042 case R_PPC_GOT_TLSGD16_LO:
3043 case R_PPC_GOT_TLSGD16_HI:
3044 case R_PPC_GOT_TLSGD16_HA:
3045 tls_type = TLS_TLS | TLS_GD;
3046 goto dogottls;
3047
3048 case R_PPC_GOT_TPREL16:
3049 case R_PPC_GOT_TPREL16_LO:
3050 case R_PPC_GOT_TPREL16_HI:
3051 case R_PPC_GOT_TPREL16_HA:
3052 if (info->shared)
3053 info->flags |= DF_STATIC_TLS;
3054 tls_type = TLS_TLS | TLS_TPREL;
3055 goto dogottls;
3056
3057 case R_PPC_GOT_DTPREL16:
3058 case R_PPC_GOT_DTPREL16_LO:
3059 case R_PPC_GOT_DTPREL16_HI:
3060 case R_PPC_GOT_DTPREL16_HA:
3061 tls_type = TLS_TLS | TLS_DTPREL;
3062 dogottls:
3063 sec->has_tls_reloc = 1;
3064 /* Fall thru */
3065
3066 /* GOT16 relocations */
3067 case R_PPC_GOT16:
3068 case R_PPC_GOT16_LO:
3069 case R_PPC_GOT16_HI:
3070 case R_PPC_GOT16_HA:
3071 /* This symbol requires a global offset table entry. */
3072 if (htab->got == NULL)
3073 {
3074 if (htab->elf.dynobj == NULL)
3075 htab->elf.dynobj = abfd;
3076 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3077 return FALSE;
3078 }
3079 if (h != NULL)
3080 {
3081 h->got.refcount += 1;
3082 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3083 }
3084 else
3085 /* This is a global offset table entry for a local symbol. */
3086 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3087 return FALSE;
3088 break;
3089
3090 /* Indirect .sdata relocation. */
3091 case R_PPC_EMB_SDAI16:
3092 if (info->shared)
3093 {
3094 bad_shared_reloc (abfd, r_type);
3095 return FALSE;
3096 }
3097 if (htab->sdata[0].section == NULL
3098 && !ppc_elf_create_linker_section (abfd, info, 0,
3099 &htab->sdata[0]))
3100 return FALSE;
3101 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
3102 h, rel))
3103 return FALSE;
3104 if (h != NULL)
3105 {
3106 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3107 h->non_got_ref = TRUE;
3108 }
3109 break;
3110
3111 /* Indirect .sdata2 relocation. */
3112 case R_PPC_EMB_SDA2I16:
3113 if (info->shared)
3114 {
3115 bad_shared_reloc (abfd, r_type);
3116 return FALSE;
3117 }
3118 if (htab->sdata[1].section == NULL
3119 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3120 &htab->sdata[1]))
3121 return FALSE;
3122 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
3123 h, rel))
3124 return FALSE;
3125 if (h != NULL)
3126 {
3127 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3128 h->non_got_ref = TRUE;
3129 }
3130 break;
3131
3132 case R_PPC_SDAREL16:
3133 if (info->shared)
3134 {
3135 bad_shared_reloc (abfd, r_type);
3136 return FALSE;
3137 }
3138 if (htab->sdata[0].sym == NULL
3139 && !create_sdata_sym (htab, &htab->sdata[0]))
3140 return FALSE;
3141 if (h != NULL)
3142 {
3143 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3144 h->non_got_ref = TRUE;
3145 }
3146 break;
3147
3148 case R_PPC_EMB_SDA2REL:
3149 if (info->shared)
3150 {
3151 bad_shared_reloc (abfd, r_type);
3152 return FALSE;
3153 }
3154 if (htab->sdata[1].sym == NULL
3155 && !create_sdata_sym (htab, &htab->sdata[1]))
3156 return FALSE;
3157 if (h != NULL)
3158 {
3159 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3160 h->non_got_ref = TRUE;
3161 }
3162 break;
3163
3164 case R_PPC_EMB_SDA21:
3165 case R_PPC_EMB_RELSDA:
3166 if (info->shared)
3167 {
3168 bad_shared_reloc (abfd, r_type);
3169 return FALSE;
3170 }
3171 if (htab->sdata[0].sym == NULL
3172 && !create_sdata_sym (htab, &htab->sdata[0]))
3173 return FALSE;
3174 if (htab->sdata[1].sym == NULL
3175 && !create_sdata_sym (htab, &htab->sdata[1]))
3176 return FALSE;
3177 if (h != NULL)
3178 {
3179 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3180 h->non_got_ref = TRUE;
3181 }
3182 break;
3183
3184 case R_PPC_EMB_NADDR32:
3185 case R_PPC_EMB_NADDR16:
3186 case R_PPC_EMB_NADDR16_LO:
3187 case R_PPC_EMB_NADDR16_HI:
3188 case R_PPC_EMB_NADDR16_HA:
3189 if (info->shared)
3190 {
3191 bad_shared_reloc (abfd, r_type);
3192 return FALSE;
3193 }
3194 if (h != NULL)
3195 h->non_got_ref = TRUE;
3196 break;
3197
3198 case R_PPC_PLT32:
3199 case R_PPC_PLTREL24:
3200 case R_PPC_PLTREL32:
3201 case R_PPC_PLT16_LO:
3202 case R_PPC_PLT16_HI:
3203 case R_PPC_PLT16_HA:
3204 #ifdef DEBUG
3205 fprintf (stderr, "Reloc requires a PLT entry\n");
3206 #endif
3207 /* This symbol requires a procedure linkage table entry. We
3208 actually build the entry in finish_dynamic_symbol,
3209 because this might be a case of linking PIC code without
3210 linking in any dynamic objects, in which case we don't
3211 need to generate a procedure linkage table after all. */
3212
3213 if (h == NULL)
3214 {
3215 /* It does not make sense to have a procedure linkage
3216 table entry for a local symbol. */
3217 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
3218 "local symbol"),
3219 abfd,
3220 sec,
3221 (long) rel->r_offset,
3222 ppc_elf_howto_table[r_type]->name);
3223 bfd_set_error (bfd_error_bad_value);
3224 return FALSE;
3225 }
3226 else
3227 {
3228 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
3229
3230 h->needs_plt = 1;
3231 if (!update_plt_info (abfd, h, got2, addend))
3232 return FALSE;
3233 }
3234 break;
3235
3236 /* The following relocations don't need to propagate the
3237 relocation if linking a shared object since they are
3238 section relative. */
3239 case R_PPC_SECTOFF:
3240 case R_PPC_SECTOFF_LO:
3241 case R_PPC_SECTOFF_HI:
3242 case R_PPC_SECTOFF_HA:
3243 case R_PPC_DTPREL16:
3244 case R_PPC_DTPREL16_LO:
3245 case R_PPC_DTPREL16_HI:
3246 case R_PPC_DTPREL16_HA:
3247 case R_PPC_TOC16:
3248 break;
3249
3250 case R_PPC_REL16:
3251 case R_PPC_REL16_LO:
3252 case R_PPC_REL16_HI:
3253 case R_PPC_REL16_HA:
3254 htab->can_use_new_plt = 1;
3255 break;
3256
3257 /* These are just markers. */
3258 case R_PPC_TLS:
3259 case R_PPC_EMB_MRKREF:
3260 case R_PPC_NONE:
3261 case R_PPC_max:
3262 case R_PPC_RELAX32:
3263 case R_PPC_RELAX32PC:
3264 case R_PPC_RELAX32_PLT:
3265 case R_PPC_RELAX32PC_PLT:
3266 break;
3267
3268 /* These should only appear in dynamic objects. */
3269 case R_PPC_COPY:
3270 case R_PPC_GLOB_DAT:
3271 case R_PPC_JMP_SLOT:
3272 case R_PPC_RELATIVE:
3273 break;
3274
3275 /* These aren't handled yet. We'll report an error later. */
3276 case R_PPC_ADDR30:
3277 case R_PPC_EMB_RELSEC16:
3278 case R_PPC_EMB_RELST_LO:
3279 case R_PPC_EMB_RELST_HI:
3280 case R_PPC_EMB_RELST_HA:
3281 case R_PPC_EMB_BIT_FLD:
3282 break;
3283
3284 /* This refers only to functions defined in the shared library. */
3285 case R_PPC_LOCAL24PC:
3286 if (h && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
3287 htab->plt_type = PLT_OLD;
3288 break;
3289
3290 /* This relocation describes the C++ object vtable hierarchy.
3291 Reconstruct it for later use during GC. */
3292 case R_PPC_GNU_VTINHERIT:
3293 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3294 return FALSE;
3295 break;
3296
3297 /* This relocation describes which C++ vtable entries are actually
3298 used. Record for later use during GC. */
3299 case R_PPC_GNU_VTENTRY:
3300 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3301 return FALSE;
3302 break;
3303
3304 /* We shouldn't really be seeing these. */
3305 case R_PPC_TPREL32:
3306 if (info->shared)
3307 info->flags |= DF_STATIC_TLS;
3308 goto dodyn;
3309
3310 /* Nor these. */
3311 case R_PPC_DTPMOD32:
3312 case R_PPC_DTPREL32:
3313 goto dodyn;
3314
3315 case R_PPC_TPREL16:
3316 case R_PPC_TPREL16_LO:
3317 case R_PPC_TPREL16_HI:
3318 case R_PPC_TPREL16_HA:
3319 if (info->shared)
3320 info->flags |= DF_STATIC_TLS;
3321 goto dodyn;
3322
3323 case R_PPC_REL32:
3324 if (h == NULL
3325 && got2 != NULL
3326 && (sec->flags & SEC_CODE) != 0
3327 && (info->shared || info->pie)
3328 && htab->plt_type == PLT_UNSET)
3329 {
3330 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3331 the start of a function, which assembles to a REL32
3332 reference to .got2. If we detect one of these, then
3333 force the old PLT layout because the linker cannot
3334 reliably deduce the GOT pointer value needed for
3335 PLT call stubs. */
3336 asection *s;
3337
3338 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
3339 r_symndx);
3340 if (s == got2)
3341 htab->plt_type = PLT_OLD;
3342 }
3343 if (h == NULL || h == htab->elf.hgot)
3344 break;
3345 goto dodyn1;
3346
3347 case R_PPC_REL24:
3348 case R_PPC_REL14:
3349 case R_PPC_REL14_BRTAKEN:
3350 case R_PPC_REL14_BRNTAKEN:
3351 if (h == NULL)
3352 break;
3353 if (h == htab->elf.hgot)
3354 {
3355 if (htab->plt_type == PLT_UNSET)
3356 htab->plt_type = PLT_OLD;
3357 break;
3358 }
3359 /* fall through */
3360
3361 case R_PPC_ADDR32:
3362 case R_PPC_ADDR24:
3363 case R_PPC_ADDR16:
3364 case R_PPC_ADDR16_LO:
3365 case R_PPC_ADDR16_HI:
3366 case R_PPC_ADDR16_HA:
3367 case R_PPC_ADDR14:
3368 case R_PPC_ADDR14_BRTAKEN:
3369 case R_PPC_ADDR14_BRNTAKEN:
3370 case R_PPC_UADDR32:
3371 case R_PPC_UADDR16:
3372 dodyn1:
3373 if (h != NULL && !info->shared)
3374 {
3375 /* We may need a plt entry if the symbol turns out to be
3376 a function defined in a dynamic object. */
3377 if (!update_plt_info (abfd, h, NULL, 0))
3378 return FALSE;
3379
3380 /* We may need a copy reloc too. */
3381 h->non_got_ref = 1;
3382 }
3383
3384 dodyn:
3385 /* If we are creating a shared library, and this is a reloc
3386 against a global symbol, or a non PC relative reloc
3387 against a local symbol, then we need to copy the reloc
3388 into the shared library. However, if we are linking with
3389 -Bsymbolic, we do not need to copy a reloc against a
3390 global symbol which is defined in an object we are
3391 including in the link (i.e., DEF_REGULAR is set). At
3392 this point we have not seen all the input files, so it is
3393 possible that DEF_REGULAR is not set now but will be set
3394 later (it is never cleared). In case of a weak definition,
3395 DEF_REGULAR may be cleared later by a strong definition in
3396 a shared library. We account for that possibility below by
3397 storing information in the dyn_relocs field of the hash
3398 table entry. A similar situation occurs when creating
3399 shared libraries and symbol visibility changes render the
3400 symbol local.
3401
3402 If on the other hand, we are creating an executable, we
3403 may need to keep relocations for symbols satisfied by a
3404 dynamic library if we manage to avoid copy relocs for the
3405 symbol. */
3406 if ((info->shared
3407 && (MUST_BE_DYN_RELOC (r_type)
3408 || (h != NULL
3409 && (! info->symbolic
3410 || h->root.type == bfd_link_hash_defweak
3411 || !h->def_regular))))
3412 || (ELIMINATE_COPY_RELOCS
3413 && !info->shared
3414 && h != NULL
3415 && (h->root.type == bfd_link_hash_defweak
3416 || !h->def_regular)))
3417 {
3418 struct ppc_elf_dyn_relocs *p;
3419 struct ppc_elf_dyn_relocs **head;
3420
3421 #ifdef DEBUG
3422 fprintf (stderr,
3423 "ppc_elf_check_relocs needs to "
3424 "create relocation for %s\n",
3425 (h && h->root.root.string
3426 ? h->root.root.string : "<unknown>"));
3427 #endif
3428 if (sreloc == NULL)
3429 {
3430 const char *name;
3431
3432 name = (bfd_elf_string_from_elf_section
3433 (abfd,
3434 elf_elfheader (abfd)->e_shstrndx,
3435 elf_section_data (sec)->rel_hdr.sh_name));
3436 if (name == NULL)
3437 return FALSE;
3438
3439 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
3440 && strcmp (bfd_get_section_name (abfd, sec),
3441 name + 5) == 0);
3442
3443 if (htab->elf.dynobj == NULL)
3444 htab->elf.dynobj = abfd;
3445 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
3446 if (sreloc == NULL)
3447 {
3448 flagword flags;
3449
3450 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3451 | SEC_IN_MEMORY | SEC_LINKER_CREATED
3452 | SEC_ALLOC | SEC_LOAD);
3453 sreloc = bfd_make_section_with_flags (htab->elf.dynobj,
3454 name,
3455 flags);
3456 if (sreloc == NULL
3457 || ! bfd_set_section_alignment (htab->elf.dynobj,
3458 sreloc, 2))
3459 return FALSE;
3460 }
3461 elf_section_data (sec)->sreloc = sreloc;
3462 }
3463
3464 /* If this is a global symbol, we count the number of
3465 relocations we need for this symbol. */
3466 if (h != NULL)
3467 {
3468 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3469 }
3470 else
3471 {
3472 /* Track dynamic relocs needed for local syms too.
3473 We really need local syms available to do this
3474 easily. Oh well. */
3475
3476 asection *s;
3477 void *vpp;
3478
3479 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
3480 sec, r_symndx);
3481 if (s == NULL)
3482 return FALSE;
3483
3484 vpp = &elf_section_data (s)->local_dynrel;
3485 head = (struct ppc_elf_dyn_relocs **) vpp;
3486 }
3487
3488 p = *head;
3489 if (p == NULL || p->sec != sec)
3490 {
3491 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3492 if (p == NULL)
3493 return FALSE;
3494 p->next = *head;
3495 *head = p;
3496 p->sec = sec;
3497 p->count = 0;
3498 p->pc_count = 0;
3499 }
3500
3501 p->count += 1;
3502 if (!MUST_BE_DYN_RELOC (r_type))
3503 p->pc_count += 1;
3504 }
3505
3506 break;
3507 }
3508 }
3509
3510 return TRUE;
3511 }
3512
3513 /* Merge backend specific data from an object file to the output
3514 object file when linking. */
3515
3516 static bfd_boolean
ppc_elf_merge_private_bfd_data(bfd * ibfd,bfd * obfd)3517 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3518 {
3519 flagword old_flags;
3520 flagword new_flags;
3521 bfd_boolean error;
3522
3523 if (!is_ppc_elf_target (ibfd->xvec)
3524 || !is_ppc_elf_target (obfd->xvec))
3525 return TRUE;
3526
3527 /* Check if we have the same endianess. */
3528 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3529 return FALSE;
3530
3531 new_flags = elf_elfheader (ibfd)->e_flags;
3532 old_flags = elf_elfheader (obfd)->e_flags;
3533 if (!elf_flags_init (obfd))
3534 {
3535 /* First call, no flags set. */
3536 elf_flags_init (obfd) = TRUE;
3537 elf_elfheader (obfd)->e_flags = new_flags;
3538 }
3539
3540 /* Compatible flags are ok. */
3541 else if (new_flags == old_flags)
3542 ;
3543
3544 /* Incompatible flags. */
3545 else
3546 {
3547 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
3548 to be linked with either. */
3549 error = FALSE;
3550 if ((new_flags & EF_PPC_RELOCATABLE) != 0
3551 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
3552 {
3553 error = TRUE;
3554 (*_bfd_error_handler)
3555 (_("%B: compiled with -mrelocatable and linked with "
3556 "modules compiled normally"), ibfd);
3557 }
3558 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
3559 && (old_flags & EF_PPC_RELOCATABLE) != 0)
3560 {
3561 error = TRUE;
3562 (*_bfd_error_handler)
3563 (_("%B: compiled normally and linked with "
3564 "modules compiled with -mrelocatable"), ibfd);
3565 }
3566
3567 /* The output is -mrelocatable-lib iff both the input files are. */
3568 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
3569 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
3570
3571 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
3572 but each input file is either -mrelocatable or -mrelocatable-lib. */
3573 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
3574 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
3575 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
3576 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
3577
3578 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
3579 any module uses it. */
3580 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
3581
3582 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3583 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3584
3585 /* Warn about any other mismatches. */
3586 if (new_flags != old_flags)
3587 {
3588 error = TRUE;
3589 (*_bfd_error_handler)
3590 (_("%B: uses different e_flags (0x%lx) fields "
3591 "than previous modules (0x%lx)"),
3592 ibfd, (long) new_flags, (long) old_flags);
3593 }
3594
3595 if (error)
3596 {
3597 bfd_set_error (bfd_error_bad_value);
3598 return FALSE;
3599 }
3600 }
3601
3602 return TRUE;
3603 }
3604
3605 /* Choose which PLT scheme to use, and set .plt flags appropriately.
3606 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
3607 int
ppc_elf_select_plt_layout(bfd * output_bfd ATTRIBUTE_UNUSED,struct bfd_link_info * info,int force_old_plt,int emit_stub_syms)3608 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
3609 struct bfd_link_info *info,
3610 int force_old_plt,
3611 int emit_stub_syms)
3612 {
3613 struct ppc_elf_link_hash_table *htab;
3614 flagword flags;
3615
3616 htab = ppc_elf_hash_table (info);
3617
3618 if (htab->plt_type == PLT_UNSET)
3619 htab->plt_type = (force_old_plt || !htab->can_use_new_plt
3620 ? PLT_OLD : PLT_NEW);
3621
3622 htab->emit_stub_syms = emit_stub_syms;
3623
3624 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
3625
3626 if (htab->plt_type == PLT_NEW)
3627 {
3628 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
3629 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3630
3631 /* The new PLT is a loaded section. */
3632 if (htab->plt != NULL
3633 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
3634 return -1;
3635
3636 /* The new GOT is not executable. */
3637 if (htab->got != NULL
3638 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
3639 return -1;
3640 }
3641 else
3642 {
3643 /* Stop an unused .glink section from affecting .text alignment. */
3644 if (htab->glink != NULL
3645 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
3646 return -1;
3647 }
3648 return htab->plt_type == PLT_NEW;
3649 }
3650
3651 /* Return the section that should be marked against GC for a given
3652 relocation. */
3653
3654 static asection *
ppc_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)3655 ppc_elf_gc_mark_hook (asection *sec,
3656 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3657 Elf_Internal_Rela *rel,
3658 struct elf_link_hash_entry *h,
3659 Elf_Internal_Sym *sym)
3660 {
3661 if (h != NULL)
3662 {
3663 switch (ELF32_R_TYPE (rel->r_info))
3664 {
3665 case R_PPC_GNU_VTINHERIT:
3666 case R_PPC_GNU_VTENTRY:
3667 break;
3668
3669 default:
3670 switch (h->root.type)
3671 {
3672 case bfd_link_hash_defined:
3673 case bfd_link_hash_defweak:
3674 return h->root.u.def.section;
3675
3676 case bfd_link_hash_common:
3677 return h->root.u.c.p->section;
3678
3679 default:
3680 break;
3681 }
3682 }
3683 }
3684 else
3685 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
3686
3687 return NULL;
3688 }
3689
3690 /* Update the got, plt and dynamic reloc reference counts for the
3691 section being removed. */
3692
3693 static bfd_boolean
ppc_elf_gc_sweep_hook(bfd * abfd,struct bfd_link_info * info,asection * sec,const Elf_Internal_Rela * relocs)3694 ppc_elf_gc_sweep_hook (bfd *abfd,
3695 struct bfd_link_info *info,
3696 asection *sec,
3697 const Elf_Internal_Rela *relocs)
3698 {
3699 struct ppc_elf_link_hash_table *htab;
3700 Elf_Internal_Shdr *symtab_hdr;
3701 struct elf_link_hash_entry **sym_hashes;
3702 bfd_signed_vma *local_got_refcounts;
3703 const Elf_Internal_Rela *rel, *relend;
3704 asection *got2;
3705
3706 if ((sec->flags & SEC_ALLOC) == 0)
3707 return TRUE;
3708
3709 elf_section_data (sec)->local_dynrel = NULL;
3710
3711 htab = ppc_elf_hash_table (info);
3712 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3713 sym_hashes = elf_sym_hashes (abfd);
3714 local_got_refcounts = elf_local_got_refcounts (abfd);
3715 got2 = bfd_get_section_by_name (abfd, ".got2");
3716
3717 relend = relocs + sec->reloc_count;
3718 for (rel = relocs; rel < relend; rel++)
3719 {
3720 unsigned long r_symndx;
3721 enum elf_ppc_reloc_type r_type;
3722 struct elf_link_hash_entry *h = NULL;
3723
3724 r_symndx = ELF32_R_SYM (rel->r_info);
3725 if (r_symndx >= symtab_hdr->sh_info)
3726 {
3727 struct ppc_elf_dyn_relocs **pp, *p;
3728 struct ppc_elf_link_hash_entry *eh;
3729
3730 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3731 while (h->root.type == bfd_link_hash_indirect
3732 || h->root.type == bfd_link_hash_warning)
3733 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3734 eh = (struct ppc_elf_link_hash_entry *) h;
3735
3736 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
3737 if (p->sec == sec)
3738 {
3739 /* Everything must go for SEC. */
3740 *pp = p->next;
3741 break;
3742 }
3743 }
3744
3745 r_type = ELF32_R_TYPE (rel->r_info);
3746 switch (r_type)
3747 {
3748 case R_PPC_GOT_TLSLD16:
3749 case R_PPC_GOT_TLSLD16_LO:
3750 case R_PPC_GOT_TLSLD16_HI:
3751 case R_PPC_GOT_TLSLD16_HA:
3752 htab->tlsld_got.refcount -= 1;
3753 /* Fall thru */
3754
3755 case R_PPC_GOT_TLSGD16:
3756 case R_PPC_GOT_TLSGD16_LO:
3757 case R_PPC_GOT_TLSGD16_HI:
3758 case R_PPC_GOT_TLSGD16_HA:
3759 case R_PPC_GOT_TPREL16:
3760 case R_PPC_GOT_TPREL16_LO:
3761 case R_PPC_GOT_TPREL16_HI:
3762 case R_PPC_GOT_TPREL16_HA:
3763 case R_PPC_GOT_DTPREL16:
3764 case R_PPC_GOT_DTPREL16_LO:
3765 case R_PPC_GOT_DTPREL16_HI:
3766 case R_PPC_GOT_DTPREL16_HA:
3767 case R_PPC_GOT16:
3768 case R_PPC_GOT16_LO:
3769 case R_PPC_GOT16_HI:
3770 case R_PPC_GOT16_HA:
3771 if (h != NULL)
3772 {
3773 if (h->got.refcount > 0)
3774 h->got.refcount--;
3775 }
3776 else if (local_got_refcounts != NULL)
3777 {
3778 if (local_got_refcounts[r_symndx] > 0)
3779 local_got_refcounts[r_symndx]--;
3780 }
3781 break;
3782
3783 case R_PPC_REL24:
3784 case R_PPC_REL14:
3785 case R_PPC_REL14_BRTAKEN:
3786 case R_PPC_REL14_BRNTAKEN:
3787 case R_PPC_REL32:
3788 if (h == NULL || h == htab->elf.hgot)
3789 break;
3790 /* Fall thru */
3791
3792 case R_PPC_ADDR32:
3793 case R_PPC_ADDR24:
3794 case R_PPC_ADDR16:
3795 case R_PPC_ADDR16_LO:
3796 case R_PPC_ADDR16_HI:
3797 case R_PPC_ADDR16_HA:
3798 case R_PPC_ADDR14:
3799 case R_PPC_ADDR14_BRTAKEN:
3800 case R_PPC_ADDR14_BRNTAKEN:
3801 case R_PPC_UADDR32:
3802 case R_PPC_UADDR16:
3803 if (info->shared)
3804 break;
3805
3806 case R_PPC_PLT32:
3807 case R_PPC_PLTREL24:
3808 case R_PPC_PLTREL32:
3809 case R_PPC_PLT16_LO:
3810 case R_PPC_PLT16_HI:
3811 case R_PPC_PLT16_HA:
3812 if (h != NULL)
3813 {
3814 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
3815 struct plt_entry *ent = find_plt_ent (h, got2, addend);
3816 if (ent != NULL && ent->plt.refcount > 0)
3817 ent->plt.refcount -= 1;
3818 }
3819 break;
3820
3821 default:
3822 break;
3823 }
3824 }
3825 return TRUE;
3826 }
3827
3828 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
3829
3830 asection *
ppc_elf_tls_setup(bfd * obfd,struct bfd_link_info * info)3831 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
3832 {
3833 struct ppc_elf_link_hash_table *htab;
3834
3835 htab = ppc_elf_hash_table (info);
3836 if (htab->plt_type == PLT_NEW
3837 && htab->plt != NULL
3838 && htab->plt->output_section != NULL)
3839 {
3840 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
3841 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
3842 }
3843
3844 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3845 FALSE, FALSE, TRUE);
3846 return _bfd_elf_tls_setup (obfd, info);
3847 }
3848
3849 /* Run through all the TLS relocs looking for optimization
3850 opportunities. */
3851
3852 bfd_boolean
ppc_elf_tls_optimize(bfd * obfd ATTRIBUTE_UNUSED,struct bfd_link_info * info)3853 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
3854 struct bfd_link_info *info)
3855 {
3856 bfd *ibfd;
3857 asection *sec;
3858 struct ppc_elf_link_hash_table *htab;
3859
3860 if (info->relocatable || info->shared)
3861 return TRUE;
3862
3863 htab = ppc_elf_hash_table (info);
3864 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3865 {
3866 Elf_Internal_Sym *locsyms = NULL;
3867 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3868
3869 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
3870 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
3871 {
3872 Elf_Internal_Rela *relstart, *rel, *relend;
3873 int expecting_tls_get_addr;
3874
3875 /* Read the relocations. */
3876 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
3877 info->keep_memory);
3878 if (relstart == NULL)
3879 return FALSE;
3880
3881 expecting_tls_get_addr = 0;
3882 relend = relstart + sec->reloc_count;
3883 for (rel = relstart; rel < relend; rel++)
3884 {
3885 enum elf_ppc_reloc_type r_type;
3886 unsigned long r_symndx;
3887 struct elf_link_hash_entry *h = NULL;
3888 char *tls_mask;
3889 char tls_set, tls_clear;
3890 bfd_boolean is_local;
3891
3892 r_symndx = ELF32_R_SYM (rel->r_info);
3893 if (r_symndx >= symtab_hdr->sh_info)
3894 {
3895 struct elf_link_hash_entry **sym_hashes;
3896
3897 sym_hashes = elf_sym_hashes (ibfd);
3898 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3899 while (h->root.type == bfd_link_hash_indirect
3900 || h->root.type == bfd_link_hash_warning)
3901 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3902 }
3903
3904 is_local = FALSE;
3905 if (h == NULL
3906 || !h->def_dynamic)
3907 is_local = TRUE;
3908
3909 r_type = ELF32_R_TYPE (rel->r_info);
3910 switch (r_type)
3911 {
3912 case R_PPC_GOT_TLSLD16:
3913 case R_PPC_GOT_TLSLD16_LO:
3914 case R_PPC_GOT_TLSLD16_HI:
3915 case R_PPC_GOT_TLSLD16_HA:
3916 /* These relocs should never be against a symbol
3917 defined in a shared lib. Leave them alone if
3918 that turns out to be the case. */
3919 expecting_tls_get_addr = 0;
3920 htab->tlsld_got.refcount -= 1;
3921 if (!is_local)
3922 continue;
3923
3924 /* LD -> LE */
3925 tls_set = 0;
3926 tls_clear = TLS_LD;
3927 expecting_tls_get_addr = 1;
3928 break;
3929
3930 case R_PPC_GOT_TLSGD16:
3931 case R_PPC_GOT_TLSGD16_LO:
3932 case R_PPC_GOT_TLSGD16_HI:
3933 case R_PPC_GOT_TLSGD16_HA:
3934 if (is_local)
3935 /* GD -> LE */
3936 tls_set = 0;
3937 else
3938 /* GD -> IE */
3939 tls_set = TLS_TLS | TLS_TPRELGD;
3940 tls_clear = TLS_GD;
3941 expecting_tls_get_addr = 1;
3942 break;
3943
3944 case R_PPC_GOT_TPREL16:
3945 case R_PPC_GOT_TPREL16_LO:
3946 case R_PPC_GOT_TPREL16_HI:
3947 case R_PPC_GOT_TPREL16_HA:
3948 expecting_tls_get_addr = 0;
3949 if (is_local)
3950 {
3951 /* IE -> LE */
3952 tls_set = 0;
3953 tls_clear = TLS_TPREL;
3954 break;
3955 }
3956 else
3957 continue;
3958
3959 case R_PPC_REL14:
3960 case R_PPC_REL14_BRTAKEN:
3961 case R_PPC_REL14_BRNTAKEN:
3962 case R_PPC_REL24:
3963 if (expecting_tls_get_addr
3964 && h != NULL
3965 && h == htab->tls_get_addr)
3966 {
3967 struct plt_entry *ent = find_plt_ent (h, NULL, 0);
3968 if (ent != NULL && ent->plt.refcount > 0)
3969 ent->plt.refcount -= 1;
3970 }
3971 expecting_tls_get_addr = 0;
3972 continue;
3973
3974 default:
3975 expecting_tls_get_addr = 0;
3976 continue;
3977 }
3978
3979 if (h != NULL)
3980 {
3981 if (tls_set == 0)
3982 {
3983 /* We managed to get rid of a got entry. */
3984 if (h->got.refcount > 0)
3985 h->got.refcount -= 1;
3986 }
3987 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
3988 }
3989 else
3990 {
3991 Elf_Internal_Sym *sym;
3992 bfd_signed_vma *lgot_refs;
3993 char *lgot_masks;
3994
3995 if (locsyms == NULL)
3996 {
3997 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
3998 if (locsyms == NULL)
3999 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4000 symtab_hdr->sh_info,
4001 0, NULL, NULL, NULL);
4002 if (locsyms == NULL)
4003 {
4004 if (elf_section_data (sec)->relocs != relstart)
4005 free (relstart);
4006 return FALSE;
4007 }
4008 }
4009 sym = locsyms + r_symndx;
4010 lgot_refs = elf_local_got_refcounts (ibfd);
4011 if (lgot_refs == NULL)
4012 abort ();
4013 if (tls_set == 0)
4014 {
4015 /* We managed to get rid of a got entry. */
4016 if (lgot_refs[r_symndx] > 0)
4017 lgot_refs[r_symndx] -= 1;
4018 }
4019 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
4020 tls_mask = &lgot_masks[r_symndx];
4021 }
4022
4023 *tls_mask |= tls_set;
4024 *tls_mask &= ~tls_clear;
4025 }
4026
4027 if (elf_section_data (sec)->relocs != relstart)
4028 free (relstart);
4029 }
4030
4031 if (locsyms != NULL
4032 && (symtab_hdr->contents != (unsigned char *) locsyms))
4033 {
4034 if (!info->keep_memory)
4035 free (locsyms);
4036 else
4037 symtab_hdr->contents = (unsigned char *) locsyms;
4038 }
4039 }
4040 return TRUE;
4041 }
4042
4043 /* Adjust a symbol defined by a dynamic object and referenced by a
4044 regular object. The current definition is in some section of the
4045 dynamic object, but we're not including those sections. We have to
4046 change the definition to something the rest of the link can
4047 understand. */
4048
4049 static bfd_boolean
ppc_elf_adjust_dynamic_symbol(struct bfd_link_info * info,struct elf_link_hash_entry * h)4050 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4051 struct elf_link_hash_entry *h)
4052 {
4053 struct ppc_elf_link_hash_table *htab;
4054 asection *s;
4055 unsigned int power_of_two;
4056
4057 #ifdef DEBUG
4058 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
4059 h->root.root.string);
4060 #endif
4061
4062 /* Make sure we know what is going on here. */
4063 htab = ppc_elf_hash_table (info);
4064 BFD_ASSERT (htab->elf.dynobj != NULL
4065 && (h->needs_plt
4066 || h->u.weakdef != NULL
4067 || (h->def_dynamic
4068 && h->ref_regular
4069 && !h->def_regular)));
4070
4071 /* Deal with function syms. */
4072 if (h->type == STT_FUNC
4073 || h->needs_plt)
4074 {
4075 /* Clear procedure linkage table information for any symbol that
4076 won't need a .plt entry. */
4077 struct plt_entry *ent;
4078 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4079 if (ent->plt.refcount > 0)
4080 break;
4081 if (ent == NULL
4082 || SYMBOL_CALLS_LOCAL (info, h)
4083 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4084 && h->root.type == bfd_link_hash_undefweak))
4085 {
4086 /* A PLT entry is not required/allowed when:
4087
4088 1. We are not using ld.so; because then the PLT entry
4089 can't be set up, so we can't use one. In this case,
4090 ppc_elf_adjust_dynamic_symbol won't even be called.
4091
4092 2. GC has rendered the entry unused.
4093
4094 3. We know for certain that a call to this symbol
4095 will go to this object, or will remain undefined. */
4096 h->plt.plist = NULL;
4097 h->needs_plt = 0;
4098 }
4099 return TRUE;
4100 }
4101 else
4102 h->plt.plist = NULL;
4103
4104 /* If this is a weak symbol, and there is a real definition, the
4105 processor independent code will have arranged for us to see the
4106 real definition first, and we can just use the same value. */
4107 if (h->u.weakdef != NULL)
4108 {
4109 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4110 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4111 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4112 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4113 if (ELIMINATE_COPY_RELOCS)
4114 h->non_got_ref = h->u.weakdef->non_got_ref;
4115 return TRUE;
4116 }
4117
4118 /* This is a reference to a symbol defined by a dynamic object which
4119 is not a function. */
4120
4121 /* If we are creating a shared library, we must presume that the
4122 only references to the symbol are via the global offset table.
4123 For such cases we need not do anything here; the relocations will
4124 be handled correctly by relocate_section. */
4125 if (info->shared)
4126 return TRUE;
4127
4128 /* If there are no references to this symbol that do not use the
4129 GOT, we don't need to generate a copy reloc. */
4130 if (!h->non_got_ref)
4131 return TRUE;
4132
4133 /* If we didn't find any dynamic relocs in read-only sections, then we'll
4134 be keeping the dynamic relocs and avoiding the copy reloc. We can't
4135 do this if there are any small data relocations. */
4136 if (ELIMINATE_COPY_RELOCS
4137 && !ppc_elf_hash_entry (h)->has_sda_refs)
4138 {
4139 struct ppc_elf_dyn_relocs *p;
4140 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4141 {
4142 s = p->sec->output_section;
4143 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4144 break;
4145 }
4146
4147 if (p == NULL)
4148 {
4149 h->non_got_ref = 0;
4150 return TRUE;
4151 }
4152 }
4153
4154 if (h->size == 0)
4155 {
4156 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
4157 h->root.root.string);
4158 return TRUE;
4159 }
4160
4161 /* We must allocate the symbol in our .dynbss section, which will
4162 become part of the .bss section of the executable. There will be
4163 an entry for this symbol in the .dynsym section. The dynamic
4164 object will contain position independent code, so all references
4165 from the dynamic object to this symbol will go through the global
4166 offset table. The dynamic linker will use the .dynsym entry to
4167 determine the address it must put in the global offset table, so
4168 both the dynamic object and the regular object will refer to the
4169 same memory location for the variable.
4170
4171 Of course, if the symbol is referenced using SDAREL relocs, we
4172 must instead allocate it in .sbss. */
4173
4174 if (ppc_elf_hash_entry (h)->has_sda_refs)
4175 s = htab->dynsbss;
4176 else
4177 s = htab->dynbss;
4178 BFD_ASSERT (s != NULL);
4179
4180 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
4181 copy the initial value out of the dynamic object and into the
4182 runtime process image. We need to remember the offset into the
4183 .rela.bss section we are going to use. */
4184 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4185 {
4186 asection *srel;
4187
4188 if (ppc_elf_hash_entry (h)->has_sda_refs)
4189 srel = htab->relsbss;
4190 else
4191 srel = htab->relbss;
4192 BFD_ASSERT (srel != NULL);
4193 srel->size += sizeof (Elf32_External_Rela);
4194 h->needs_copy = 1;
4195 }
4196
4197 /* We need to figure out the alignment required for this symbol. I
4198 have no idea how ELF linkers handle this. */
4199 power_of_two = bfd_log2 (h->size);
4200 if (power_of_two > 4)
4201 power_of_two = 4;
4202
4203 /* Apply the required alignment. */
4204 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
4205 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
4206 {
4207 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
4208 return FALSE;
4209 }
4210
4211 /* Define the symbol as being at this point in the section. */
4212 h->root.u.def.section = s;
4213 h->root.u.def.value = s->size;
4214
4215 /* Increment the section size to make room for the symbol. */
4216 s->size += h->size;
4217
4218 return TRUE;
4219 }
4220
4221 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
4222 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
4223 specifying the addend on the plt relocation. For -fpic code, the sym
4224 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
4225 xxxxxxxx.got2.plt_pic32.<callee>. */
4226
4227 static bfd_boolean
add_stub_sym(struct plt_entry * ent,struct elf_link_hash_entry * h,struct bfd_link_info * info)4228 add_stub_sym (struct plt_entry *ent,
4229 struct elf_link_hash_entry *h,
4230 struct bfd_link_info *info)
4231 {
4232 struct elf_link_hash_entry *sh;
4233 size_t len1, len2, len3;
4234 char *name;
4235 const char *stub;
4236 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
4237
4238 if (info->shared || info->pie)
4239 stub = ".plt_pic32.";
4240 else
4241 stub = ".plt_call32.";
4242
4243 len1 = strlen (h->root.root.string);
4244 len2 = strlen (stub);
4245 len3 = 0;
4246 if (ent->sec)
4247 len3 = strlen (ent->sec->name);
4248 name = bfd_malloc (len1 + len2 + len3 + 9);
4249 if (name == NULL)
4250 return FALSE;
4251 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
4252 if (ent->sec)
4253 memcpy (name + 8, ent->sec->name, len3);
4254 memcpy (name + 8 + len3, stub, len2);
4255 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
4256 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
4257 if (sh == NULL)
4258 return FALSE;
4259 if (sh->root.type == bfd_link_hash_new)
4260 {
4261 sh->root.type = bfd_link_hash_defined;
4262 sh->root.u.def.section = htab->glink;
4263 sh->root.u.def.value = ent->glink_offset;
4264 sh->ref_regular = 1;
4265 sh->def_regular = 1;
4266 sh->ref_regular_nonweak = 1;
4267 sh->forced_local = 1;
4268 sh->non_elf = 0;
4269 }
4270 return TRUE;
4271 }
4272
4273 /* Allocate NEED contiguous space in .got, and return the offset.
4274 Handles allocation of the got header when crossing 32k. */
4275
4276 static bfd_vma
allocate_got(struct ppc_elf_link_hash_table * htab,unsigned int need)4277 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
4278 {
4279 bfd_vma where;
4280 unsigned int max_before_header;
4281
4282 if (htab->plt_type == PLT_VXWORKS)
4283 {
4284 where = htab->got->size;
4285 htab->got->size += need;
4286 }
4287 else
4288 {
4289 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
4290 if (need <= htab->got_gap)
4291 {
4292 where = max_before_header - htab->got_gap;
4293 htab->got_gap -= need;
4294 }
4295 else
4296 {
4297 if (htab->got->size + need > max_before_header
4298 && htab->got->size <= max_before_header)
4299 {
4300 htab->got_gap = max_before_header - htab->got->size;
4301 htab->got->size = max_before_header + htab->got_header_size;
4302 }
4303 where = htab->got->size;
4304 htab->got->size += need;
4305 }
4306 }
4307 return where;
4308 }
4309
4310 /* Allocate space in associated reloc sections for dynamic relocs. */
4311
4312 static bfd_boolean
allocate_dynrelocs(struct elf_link_hash_entry * h,void * inf)4313 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
4314 {
4315 struct bfd_link_info *info = inf;
4316 struct ppc_elf_link_hash_entry *eh;
4317 struct ppc_elf_link_hash_table *htab;
4318 struct ppc_elf_dyn_relocs *p;
4319
4320 if (h->root.type == bfd_link_hash_indirect)
4321 return TRUE;
4322
4323 if (h->root.type == bfd_link_hash_warning)
4324 /* When warning symbols are created, they **replace** the "real"
4325 entry in the hash table, thus we never get to see the real
4326 symbol in a hash traversal. So look at it now. */
4327 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4328
4329 htab = ppc_elf_hash_table (info);
4330 if (htab->elf.dynamic_sections_created)
4331 {
4332 struct plt_entry *ent;
4333 bfd_boolean doneone = FALSE;
4334 bfd_vma plt_offset = 0, glink_offset = 0;
4335
4336 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4337 if (ent->plt.refcount > 0)
4338 {
4339 /* Make sure this symbol is output as a dynamic symbol. */
4340 if (h->dynindx == -1
4341 && !h->forced_local)
4342 {
4343 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4344 return FALSE;
4345 }
4346
4347 if (info->shared
4348 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
4349 {
4350 asection *s = htab->plt;
4351
4352 if (htab->plt_type == PLT_NEW)
4353 {
4354 if (!doneone)
4355 {
4356 plt_offset = s->size;
4357 s->size += 4;
4358 }
4359 ent->plt.offset = plt_offset;
4360
4361 s = htab->glink;
4362 if (!doneone || info->shared || info->pie)
4363 {
4364 glink_offset = s->size;
4365 s->size += GLINK_ENTRY_SIZE;
4366 }
4367 if (!doneone
4368 && !info->shared
4369 && !h->def_regular)
4370 {
4371 h->root.u.def.section = s;
4372 h->root.u.def.value = glink_offset;
4373 }
4374 ent->glink_offset = glink_offset;
4375
4376 if (htab->emit_stub_syms
4377 && !add_stub_sym (ent, h, info))
4378 return FALSE;
4379 }
4380 else
4381 {
4382 if (!doneone)
4383 {
4384 /* If this is the first .plt entry, make room
4385 for the special first entry. */
4386 if (s->size == 0)
4387 s->size += htab->plt_initial_entry_size;
4388
4389 /* The PowerPC PLT is actually composed of two
4390 parts, the first part is 2 words (for a load
4391 and a jump), and then there is a remaining
4392 word available at the end. */
4393 plt_offset = (htab->plt_initial_entry_size
4394 + (htab->plt_slot_size
4395 * ((s->size
4396 - htab->plt_initial_entry_size)
4397 / htab->plt_entry_size)));
4398
4399 /* If this symbol is not defined in a regular
4400 file, and we are not generating a shared
4401 library, then set the symbol to this location
4402 in the .plt. This is required to make
4403 function pointers compare as equal between
4404 the normal executable and the shared library. */
4405 if (! info->shared
4406 && !h->def_regular)
4407 {
4408 h->root.u.def.section = s;
4409 h->root.u.def.value = plt_offset;
4410 }
4411
4412 /* Make room for this entry. */
4413 s->size += htab->plt_entry_size;
4414 /* After the 8192nd entry, room for two entries
4415 is allocated. */
4416 if (htab->plt_type == PLT_OLD
4417 && (s->size - htab->plt_initial_entry_size)
4418 / htab->plt_entry_size
4419 > PLT_NUM_SINGLE_ENTRIES)
4420 s->size += htab->plt_entry_size;
4421 }
4422 ent->plt.offset = plt_offset;
4423 }
4424
4425 /* We also need to make an entry in the .rela.plt section. */
4426 if (!doneone)
4427 {
4428 htab->relplt->size += sizeof (Elf32_External_Rela);
4429
4430 if (htab->plt_type == PLT_VXWORKS)
4431 {
4432 /* Allocate space for the unloaded relocations. */
4433 if (!info->shared)
4434 {
4435 if (ent->plt.offset
4436 == (bfd_vma) htab->plt_initial_entry_size)
4437 {
4438 htab->srelplt2->size
4439 += sizeof (Elf32_External_Rela)
4440 * VXWORKS_PLTRESOLVE_RELOCS;
4441 }
4442
4443 htab->srelplt2->size
4444 += sizeof (Elf32_External_Rela)
4445 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS;
4446 }
4447
4448 /* Every PLT entry has an associated GOT entry in
4449 .got.plt. */
4450 htab->sgotplt->size += 4;
4451 }
4452 doneone = TRUE;
4453 }
4454 }
4455 else
4456 ent->plt.offset = (bfd_vma) -1;
4457
4458 if (!doneone)
4459 {
4460 h->plt.plist = NULL;
4461 h->needs_plt = 0;
4462 }
4463 }
4464 }
4465 else
4466 {
4467 h->plt.plist = NULL;
4468 h->needs_plt = 0;
4469 }
4470
4471 eh = (struct ppc_elf_link_hash_entry *) h;
4472 if (eh->elf.got.refcount > 0)
4473 {
4474 /* Make sure this symbol is output as a dynamic symbol. */
4475 if (eh->elf.dynindx == -1
4476 && !eh->elf.forced_local)
4477 {
4478 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
4479 return FALSE;
4480 }
4481
4482 if (eh->tls_mask == (TLS_TLS | TLS_LD)
4483 && !eh->elf.def_dynamic)
4484 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
4485 eh->elf.got.offset = (bfd_vma) -1;
4486 else
4487 {
4488 bfd_boolean dyn;
4489 unsigned int need = 0;
4490 if ((eh->tls_mask & TLS_TLS) != 0)
4491 {
4492 if ((eh->tls_mask & TLS_LD) != 0)
4493 need += 8;
4494 if ((eh->tls_mask & TLS_GD) != 0)
4495 need += 8;
4496 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
4497 need += 4;
4498 if ((eh->tls_mask & TLS_DTPREL) != 0)
4499 need += 4;
4500 }
4501 else
4502 need += 4;
4503 eh->elf.got.offset = allocate_got (htab, need);
4504 dyn = htab->elf.dynamic_sections_created;
4505 if ((info->shared
4506 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
4507 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
4508 || eh->elf.root.type != bfd_link_hash_undefweak))
4509 {
4510 /* All the entries we allocated need relocs.
4511 Except LD only needs one. */
4512 if ((eh->tls_mask & TLS_LD) != 0)
4513 need -= 4;
4514 htab->relgot->size += need * (sizeof (Elf32_External_Rela) / 4);
4515 }
4516 }
4517 }
4518 else
4519 eh->elf.got.offset = (bfd_vma) -1;
4520
4521 if (eh->dyn_relocs == NULL)
4522 return TRUE;
4523
4524 /* In the shared -Bsymbolic case, discard space allocated for
4525 dynamic pc-relative relocs against symbols which turn out to be
4526 defined in regular objects. For the normal shared case, discard
4527 space for relocs that have become local due to symbol visibility
4528 changes. */
4529
4530 if (info->shared)
4531 {
4532 /* Relocs that use pc_count are those that appear on a call insn,
4533 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
4534 generated via assembly. We want calls to protected symbols to
4535 resolve directly to the function rather than going via the plt.
4536 If people want function pointer comparisons to work as expected
4537 then they should avoid writing weird assembly. */
4538 if (SYMBOL_CALLS_LOCAL (info, h))
4539 {
4540 struct ppc_elf_dyn_relocs **pp;
4541
4542 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
4543 {
4544 p->count -= p->pc_count;
4545 p->pc_count = 0;
4546 if (p->count == 0)
4547 *pp = p->next;
4548 else
4549 pp = &p->next;
4550 }
4551 }
4552
4553 /* Also discard relocs on undefined weak syms with non-default
4554 visibility. */
4555 if (eh->dyn_relocs != NULL
4556 && h->root.type == bfd_link_hash_undefweak)
4557 {
4558 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4559 eh->dyn_relocs = NULL;
4560
4561 /* Make sure undefined weak symbols are output as a dynamic
4562 symbol in PIEs. */
4563 else if (h->dynindx == -1
4564 && !h->forced_local)
4565 {
4566 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4567 return FALSE;
4568 }
4569 }
4570 }
4571 else if (ELIMINATE_COPY_RELOCS)
4572 {
4573 /* For the non-shared case, discard space for relocs against
4574 symbols which turn out to need copy relocs or are not
4575 dynamic. */
4576
4577 if (!h->non_got_ref
4578 && h->def_dynamic
4579 && !h->def_regular)
4580 {
4581 /* Make sure this symbol is output as a dynamic symbol.
4582 Undefined weak syms won't yet be marked as dynamic. */
4583 if (h->dynindx == -1
4584 && !h->forced_local)
4585 {
4586 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4587 return FALSE;
4588 }
4589
4590 /* If that succeeded, we know we'll be keeping all the
4591 relocs. */
4592 if (h->dynindx != -1)
4593 goto keep;
4594 }
4595
4596 eh->dyn_relocs = NULL;
4597
4598 keep: ;
4599 }
4600
4601 /* Finally, allocate space. */
4602 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4603 {
4604 asection *sreloc = elf_section_data (p->sec)->sreloc;
4605 sreloc->size += p->count * sizeof (Elf32_External_Rela);
4606 }
4607
4608 return TRUE;
4609 }
4610
4611 /* Find any dynamic relocs that apply to read-only sections. */
4612
4613 static bfd_boolean
readonly_dynrelocs(struct elf_link_hash_entry * h,void * info)4614 readonly_dynrelocs (struct elf_link_hash_entry *h, void *info)
4615 {
4616 struct ppc_elf_dyn_relocs *p;
4617
4618 if (h->root.type == bfd_link_hash_indirect)
4619 return TRUE;
4620
4621 if (h->root.type == bfd_link_hash_warning)
4622 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4623
4624 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4625 {
4626 asection *s = p->sec->output_section;
4627
4628 if (s != NULL
4629 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
4630 == (SEC_READONLY | SEC_ALLOC)))
4631 {
4632 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
4633
4634 /* Not an error, just cut short the traversal. */
4635 return FALSE;
4636 }
4637 }
4638 return TRUE;
4639 }
4640
4641 /* Set the sizes of the dynamic sections. */
4642
4643 static bfd_boolean
ppc_elf_size_dynamic_sections(bfd * output_bfd ATTRIBUTE_UNUSED,struct bfd_link_info * info)4644 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
4645 struct bfd_link_info *info)
4646 {
4647 struct ppc_elf_link_hash_table *htab;
4648 asection *s;
4649 bfd_boolean relocs;
4650 bfd *ibfd;
4651
4652 #ifdef DEBUG
4653 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
4654 #endif
4655
4656 htab = ppc_elf_hash_table (info);
4657 BFD_ASSERT (htab->elf.dynobj != NULL);
4658
4659 if (elf_hash_table (info)->dynamic_sections_created)
4660 {
4661 /* Set the contents of the .interp section to the interpreter. */
4662 if (info->executable && !info->static_link)
4663 {
4664 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
4665 BFD_ASSERT (s != NULL);
4666 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4667 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4668 }
4669 }
4670
4671 if (htab->plt_type == PLT_OLD)
4672 htab->got_header_size = 16;
4673 else if (htab->plt_type == PLT_NEW)
4674 htab->got_header_size = 12;
4675
4676 /* Set up .got offsets for local syms, and space for local dynamic
4677 relocs. */
4678 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4679 {
4680 bfd_signed_vma *local_got;
4681 bfd_signed_vma *end_local_got;
4682 char *lgot_masks;
4683 bfd_size_type locsymcount;
4684 Elf_Internal_Shdr *symtab_hdr;
4685
4686 if (!is_ppc_elf_target (ibfd->xvec))
4687 continue;
4688
4689 for (s = ibfd->sections; s != NULL; s = s->next)
4690 {
4691 struct ppc_elf_dyn_relocs *p;
4692
4693 for (p = ((struct ppc_elf_dyn_relocs *)
4694 elf_section_data (s)->local_dynrel);
4695 p != NULL;
4696 p = p->next)
4697 {
4698 if (!bfd_is_abs_section (p->sec)
4699 && bfd_is_abs_section (p->sec->output_section))
4700 {
4701 /* Input section has been discarded, either because
4702 it is a copy of a linkonce section or due to
4703 linker script /DISCARD/, so we'll be discarding
4704 the relocs too. */
4705 }
4706 else if (p->count != 0)
4707 {
4708 elf_section_data (p->sec)->sreloc->size
4709 += p->count * sizeof (Elf32_External_Rela);
4710 if ((p->sec->output_section->flags
4711 & (SEC_READONLY | SEC_ALLOC))
4712 == (SEC_READONLY | SEC_ALLOC))
4713 info->flags |= DF_TEXTREL;
4714 }
4715 }
4716 }
4717
4718 local_got = elf_local_got_refcounts (ibfd);
4719 if (!local_got)
4720 continue;
4721
4722 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4723 locsymcount = symtab_hdr->sh_info;
4724 end_local_got = local_got + locsymcount;
4725 lgot_masks = (char *) end_local_got;
4726 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
4727 if (*local_got > 0)
4728 {
4729 if (*lgot_masks == (TLS_TLS | TLS_LD))
4730 {
4731 /* If just an LD reloc, we'll just use
4732 htab->tlsld_got.offset. */
4733 htab->tlsld_got.refcount += 1;
4734 *local_got = (bfd_vma) -1;
4735 }
4736 else
4737 {
4738 unsigned int need = 0;
4739 if ((*lgot_masks & TLS_TLS) != 0)
4740 {
4741 if ((*lgot_masks & TLS_GD) != 0)
4742 need += 8;
4743 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
4744 need += 4;
4745 if ((*lgot_masks & TLS_DTPREL) != 0)
4746 need += 4;
4747 }
4748 else
4749 need += 4;
4750 *local_got = allocate_got (htab, need);
4751 if (info->shared)
4752 htab->relgot->size += (need
4753 * (sizeof (Elf32_External_Rela) / 4));
4754 }
4755 }
4756 else
4757 *local_got = (bfd_vma) -1;
4758 }
4759
4760 if (htab->tlsld_got.refcount > 0)
4761 {
4762 htab->tlsld_got.offset = allocate_got (htab, 8);
4763 if (info->shared)
4764 htab->relgot->size += sizeof (Elf32_External_Rela);
4765 }
4766 else
4767 htab->tlsld_got.offset = (bfd_vma) -1;
4768
4769 /* Allocate space for global sym dynamic relocs. */
4770 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
4771
4772 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
4773 {
4774 unsigned int g_o_t = 32768;
4775
4776 /* If we haven't allocated the header, do so now. When we get here,
4777 for old plt/got the got size will be 0 to 32764 (not allocated),
4778 or 32780 to 65536 (header allocated). For new plt/got, the
4779 corresponding ranges are 0 to 32768 and 32780 to 65536. */
4780 if (htab->got->size <= 32768)
4781 {
4782 g_o_t = htab->got->size;
4783 if (htab->plt_type == PLT_OLD)
4784 g_o_t += 4;
4785 htab->got->size += htab->got_header_size;
4786 }
4787
4788 htab->elf.hgot->root.u.def.value = g_o_t;
4789 }
4790
4791 if (htab->glink != NULL && htab->glink->size != 0)
4792 {
4793 htab->glink_pltresolve = htab->glink->size;
4794 /* Space for the branch table. */
4795 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
4796 /* Pad out to align the start of PLTresolve. */
4797 htab->glink->size += -htab->glink->size & 15;
4798 htab->glink->size += GLINK_PLTRESOLVE;
4799
4800 if (htab->emit_stub_syms)
4801 {
4802 struct elf_link_hash_entry *sh;
4803 sh = elf_link_hash_lookup (&htab->elf, "__glink",
4804 TRUE, FALSE, FALSE);
4805 if (sh == NULL)
4806 return FALSE;
4807 if (sh->root.type == bfd_link_hash_new)
4808 {
4809 sh->root.type = bfd_link_hash_defined;
4810 sh->root.u.def.section = htab->glink;
4811 sh->root.u.def.value = htab->glink_pltresolve;
4812 sh->ref_regular = 1;
4813 sh->def_regular = 1;
4814 sh->ref_regular_nonweak = 1;
4815 sh->forced_local = 1;
4816 sh->non_elf = 0;
4817 }
4818 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
4819 TRUE, FALSE, FALSE);
4820 if (sh == NULL)
4821 return FALSE;
4822 if (sh->root.type == bfd_link_hash_new)
4823 {
4824 sh->root.type = bfd_link_hash_defined;
4825 sh->root.u.def.section = htab->glink;
4826 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
4827 sh->ref_regular = 1;
4828 sh->def_regular = 1;
4829 sh->ref_regular_nonweak = 1;
4830 sh->forced_local = 1;
4831 sh->non_elf = 0;
4832 }
4833 }
4834 }
4835
4836 /* We've now determined the sizes of the various dynamic sections.
4837 Allocate memory for them. */
4838 relocs = FALSE;
4839 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
4840 {
4841 bfd_boolean strip_section = TRUE;
4842
4843 if ((s->flags & SEC_LINKER_CREATED) == 0)
4844 continue;
4845
4846 if (s == htab->plt
4847 || s == htab->glink
4848 || s == htab->got
4849 || s == htab->sgotplt
4850 || s == htab->sbss
4851 || s == htab->dynbss
4852 || s == htab->dynsbss)
4853 {
4854 /* We'd like to strip these sections if they aren't needed, but if
4855 we've exported dynamic symbols from them we must leave them.
4856 It's too late to tell BFD to get rid of the symbols. */
4857 if ((s == htab->plt || s == htab->got) && htab->elf.hplt != NULL)
4858 strip_section = FALSE;
4859 /* Strip this section if we don't need it; see the
4860 comment below. */
4861 }
4862 else if (s == htab->sdata[0].section
4863 || s == htab->sdata[1].section)
4864 {
4865 /* Strip these too. */
4866 }
4867 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
4868 {
4869 if (s->size != 0)
4870 {
4871 /* Remember whether there are any relocation sections. */
4872 relocs = TRUE;
4873
4874 /* We use the reloc_count field as a counter if we need
4875 to copy relocs into the output file. */
4876 s->reloc_count = 0;
4877 }
4878 }
4879 else
4880 {
4881 /* It's not one of our sections, so don't allocate space. */
4882 continue;
4883 }
4884
4885 if (s->size == 0 && strip_section)
4886 {
4887 /* If we don't need this section, strip it from the
4888 output file. This is mostly to handle .rela.bss and
4889 .rela.plt. We must create both sections in
4890 create_dynamic_sections, because they must be created
4891 before the linker maps input sections to output
4892 sections. The linker does that before
4893 adjust_dynamic_symbol is called, and it is that
4894 function which decides whether anything needs to go
4895 into these sections. */
4896 s->flags |= SEC_EXCLUDE;
4897 continue;
4898 }
4899
4900 if ((s->flags & SEC_HAS_CONTENTS) == 0)
4901 continue;
4902
4903 /* Allocate memory for the section contents. */
4904 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
4905 if (s->contents == NULL)
4906 return FALSE;
4907 }
4908
4909 if (htab->elf.dynamic_sections_created)
4910 {
4911 /* Add some entries to the .dynamic section. We fill in the
4912 values later, in ppc_elf_finish_dynamic_sections, but we
4913 must add the entries now so that we get the correct size for
4914 the .dynamic section. The DT_DEBUG entry is filled in by the
4915 dynamic linker and used by the debugger. */
4916 #define add_dynamic_entry(TAG, VAL) \
4917 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
4918
4919 if (info->executable)
4920 {
4921 if (!add_dynamic_entry (DT_DEBUG, 0))
4922 return FALSE;
4923 }
4924
4925 if (htab->plt != NULL && htab->plt->size != 0)
4926 {
4927 if (!add_dynamic_entry (DT_PLTGOT, 0)
4928 || !add_dynamic_entry (DT_PLTRELSZ, 0)
4929 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
4930 || !add_dynamic_entry (DT_JMPREL, 0))
4931 return FALSE;
4932 }
4933
4934 if (htab->glink != NULL && htab->glink->size != 0)
4935 {
4936 if (!add_dynamic_entry (DT_PPC_GOT, 0))
4937 return FALSE;
4938 }
4939
4940 if (relocs)
4941 {
4942 if (!add_dynamic_entry (DT_RELA, 0)
4943 || !add_dynamic_entry (DT_RELASZ, 0)
4944 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
4945 return FALSE;
4946 }
4947
4948 /* If any dynamic relocs apply to a read-only section, then we
4949 need a DT_TEXTREL entry. */
4950 if ((info->flags & DF_TEXTREL) == 0)
4951 elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs,
4952 info);
4953
4954 if ((info->flags & DF_TEXTREL) != 0)
4955 {
4956 if (!add_dynamic_entry (DT_TEXTREL, 0))
4957 return FALSE;
4958 }
4959 }
4960 #undef add_dynamic_entry
4961
4962 return TRUE;
4963 }
4964
4965 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
4966
4967 static const int shared_stub_entry[] =
4968 {
4969 0x7c0802a6, /* mflr 0 */
4970 0x429f0005, /* bcl 20, 31, .Lxxx */
4971 0x7d6802a6, /* mflr 11 */
4972 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
4973 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
4974 0x7c0803a6, /* mtlr 0 */
4975 0x7d6903a6, /* mtctr 11 */
4976 0x4e800420, /* bctr */
4977 };
4978
4979 static const int stub_entry[] =
4980 {
4981 0x3d600000, /* lis 11,xxx@ha */
4982 0x396b0000, /* addi 11,11,xxx@l */
4983 0x7d6903a6, /* mtctr 11 */
4984 0x4e800420, /* bctr */
4985 };
4986
4987 static bfd_boolean
ppc_elf_relax_section(bfd * abfd,asection * isec,struct bfd_link_info * link_info,bfd_boolean * again)4988 ppc_elf_relax_section (bfd *abfd,
4989 asection *isec,
4990 struct bfd_link_info *link_info,
4991 bfd_boolean *again)
4992 {
4993 struct one_fixup
4994 {
4995 struct one_fixup *next;
4996 asection *tsec;
4997 bfd_vma toff;
4998 bfd_vma trampoff;
4999 };
5000
5001 Elf_Internal_Shdr *symtab_hdr;
5002 bfd_byte *contents = NULL;
5003 Elf_Internal_Sym *isymbuf = NULL;
5004 Elf_Internal_Rela *internal_relocs = NULL;
5005 Elf_Internal_Rela *irel, *irelend;
5006 struct one_fixup *fixups = NULL;
5007 bfd_boolean changed;
5008 struct ppc_elf_link_hash_table *htab;
5009 bfd_size_type trampoff;
5010 asection *got2;
5011
5012 *again = FALSE;
5013
5014 /* Nothing to do if there are no relocations, and no need to do
5015 anything with non-alloc sections. */
5016 if ((isec->flags & SEC_ALLOC) == 0
5017 || (isec->flags & SEC_RELOC) == 0
5018 || isec->reloc_count == 0)
5019 return TRUE;
5020
5021 trampoff = (isec->size + 3) & (bfd_vma) -4;
5022 /* Space for a branch around any trampolines. */
5023 trampoff += 4;
5024
5025 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5026
5027 /* Get a copy of the native relocations. */
5028 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
5029 link_info->keep_memory);
5030 if (internal_relocs == NULL)
5031 goto error_return;
5032
5033 htab = ppc_elf_hash_table (link_info);
5034 got2 = bfd_get_section_by_name (abfd, ".got2");
5035
5036 irelend = internal_relocs + isec->reloc_count;
5037 for (irel = internal_relocs; irel < irelend; irel++)
5038 {
5039 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
5040 bfd_vma symaddr, reladdr, toff, roff;
5041 asection *tsec;
5042 struct one_fixup *f;
5043 size_t insn_offset = 0;
5044 bfd_vma max_branch_offset, val;
5045 bfd_byte *hit_addr;
5046 unsigned long t0;
5047 unsigned char sym_type;
5048
5049 switch (r_type)
5050 {
5051 case R_PPC_REL24:
5052 case R_PPC_LOCAL24PC:
5053 case R_PPC_PLTREL24:
5054 max_branch_offset = 1 << 25;
5055 break;
5056
5057 case R_PPC_REL14:
5058 case R_PPC_REL14_BRTAKEN:
5059 case R_PPC_REL14_BRNTAKEN:
5060 max_branch_offset = 1 << 15;
5061 break;
5062
5063 default:
5064 continue;
5065 }
5066
5067 /* Get the value of the symbol referred to by the reloc. */
5068 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5069 {
5070 /* A local symbol. */
5071 Elf_Internal_Sym *isym;
5072
5073 /* Read this BFD's local symbols. */
5074 if (isymbuf == NULL)
5075 {
5076 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5077 if (isymbuf == NULL)
5078 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5079 symtab_hdr->sh_info, 0,
5080 NULL, NULL, NULL);
5081 if (isymbuf == 0)
5082 goto error_return;
5083 }
5084 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5085 if (isym->st_shndx == SHN_UNDEF)
5086 continue; /* We can't do anything with undefined symbols. */
5087 else if (isym->st_shndx == SHN_ABS)
5088 tsec = bfd_abs_section_ptr;
5089 else if (isym->st_shndx == SHN_COMMON)
5090 tsec = bfd_com_section_ptr;
5091 else
5092 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5093
5094 toff = isym->st_value;
5095 sym_type = ELF_ST_TYPE (isym->st_info);
5096 }
5097 else
5098 {
5099 /* Global symbol handling. */
5100 unsigned long indx;
5101 struct elf_link_hash_entry *h;
5102
5103 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5104 h = elf_sym_hashes (abfd)[indx];
5105
5106 while (h->root.type == bfd_link_hash_indirect
5107 || h->root.type == bfd_link_hash_warning)
5108 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5109
5110 tsec = NULL;
5111 toff = 0;
5112 if (r_type == R_PPC_PLTREL24
5113 && htab->plt != NULL)
5114 {
5115 struct plt_entry *ent = find_plt_ent (h, got2, irel->r_addend);
5116
5117 if (ent != NULL)
5118 {
5119 if (htab->plt_type == PLT_NEW)
5120 {
5121 tsec = htab->glink;
5122 toff = ent->glink_offset;
5123 }
5124 else
5125 {
5126 tsec = htab->plt;
5127 toff = ent->plt.offset;
5128 }
5129 }
5130 }
5131 if (tsec != NULL)
5132 ;
5133 else if (h->root.type == bfd_link_hash_defined
5134 || h->root.type == bfd_link_hash_defweak)
5135 {
5136 tsec = h->root.u.def.section;
5137 toff = h->root.u.def.value;
5138 }
5139 else
5140 continue;
5141
5142 sym_type = h->type;
5143 }
5144
5145 /* If the branch and target are in the same section, you have
5146 no hope of adding stubs. We'll error out later should the
5147 branch overflow. */
5148 if (tsec == isec)
5149 continue;
5150
5151 /* There probably isn't any reason to handle symbols in
5152 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
5153 attribute for a code section, and we are only looking at
5154 branches. However, implement it correctly here as a
5155 reference for other target relax_section functions. */
5156 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
5157 {
5158 /* At this stage in linking, no SEC_MERGE symbol has been
5159 adjusted, so all references to such symbols need to be
5160 passed through _bfd_merged_section_offset. (Later, in
5161 relocate_section, all SEC_MERGE symbols *except* for
5162 section symbols have been adjusted.)
5163
5164 gas may reduce relocations against symbols in SEC_MERGE
5165 sections to a relocation against the section symbol when
5166 the original addend was zero. When the reloc is against
5167 a section symbol we should include the addend in the
5168 offset passed to _bfd_merged_section_offset, since the
5169 location of interest is the original symbol. On the
5170 other hand, an access to "sym+addend" where "sym" is not
5171 a section symbol should not include the addend; Such an
5172 access is presumed to be an offset from "sym"; The
5173 location of interest is just "sym". */
5174 if (sym_type == STT_SECTION)
5175 toff += irel->r_addend;
5176
5177 toff = _bfd_merged_section_offset (abfd, &tsec,
5178 elf_section_data (tsec)->sec_info,
5179 toff);
5180
5181 if (sym_type != STT_SECTION)
5182 toff += irel->r_addend;
5183 }
5184 /* PLTREL24 addends are special. */
5185 else if (r_type != R_PPC_PLTREL24)
5186 toff += irel->r_addend;
5187
5188 /* Attempted -shared link of non-pic code loses. */
5189 if (tsec->output_section == NULL)
5190 continue;
5191
5192 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
5193
5194 roff = irel->r_offset;
5195 reladdr = isec->output_section->vma + isec->output_offset + roff;
5196
5197 /* If the branch is in range, no need to do anything. */
5198 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
5199 continue;
5200
5201 /* Look for an existing fixup to this address. */
5202 for (f = fixups; f ; f = f->next)
5203 if (f->tsec == tsec && f->toff == toff)
5204 break;
5205
5206 if (f == NULL)
5207 {
5208 size_t size;
5209 unsigned long stub_rtype;
5210
5211 val = trampoff - roff;
5212 if (val >= max_branch_offset)
5213 /* Oh dear, we can't reach a trampoline. Don't try to add
5214 one. We'll report an error later. */
5215 continue;
5216
5217 if (link_info->shared)
5218 {
5219 size = 4 * ARRAY_SIZE (shared_stub_entry);
5220 insn_offset = 12;
5221 stub_rtype = R_PPC_RELAX32PC;
5222 }
5223 else
5224 {
5225 size = 4 * ARRAY_SIZE (stub_entry);
5226 insn_offset = 0;
5227 stub_rtype = R_PPC_RELAX32;
5228 }
5229
5230 if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
5231 != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
5232 abort ();
5233 if (tsec == htab->plt
5234 || tsec == htab->glink)
5235 stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
5236
5237 /* Hijack the old relocation. Since we need two
5238 relocations for this use a "composite" reloc. */
5239 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
5240 stub_rtype);
5241 irel->r_offset = trampoff + insn_offset;
5242 if (r_type == R_PPC_PLTREL24 &&
5243 (stub_rtype == R_PPC_RELAX32 || stub_rtype == R_PPC_RELAX32PC))
5244 irel->r_addend = 0;
5245
5246 /* Record the fixup so we don't do it again this section. */
5247 f = bfd_malloc (sizeof (*f));
5248 f->next = fixups;
5249 f->tsec = tsec;
5250 f->toff = toff;
5251 f->trampoff = trampoff;
5252 fixups = f;
5253
5254 trampoff += size;
5255 }
5256 else
5257 {
5258 val = f->trampoff - roff;
5259 if (val >= max_branch_offset)
5260 continue;
5261
5262 /* Nop out the reloc, since we're finalizing things here. */
5263 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
5264 }
5265
5266 /* Get the section contents. */
5267 if (contents == NULL)
5268 {
5269 /* Get cached copy if it exists. */
5270 if (elf_section_data (isec)->this_hdr.contents != NULL)
5271 contents = elf_section_data (isec)->this_hdr.contents;
5272 else
5273 {
5274 /* Go get them off disk. */
5275 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
5276 goto error_return;
5277 }
5278 }
5279
5280 /* Fix up the existing branch to hit the trampoline. */
5281 hit_addr = contents + roff;
5282 switch (r_type)
5283 {
5284 case R_PPC_REL24:
5285 case R_PPC_LOCAL24PC:
5286 case R_PPC_PLTREL24:
5287 t0 = bfd_get_32 (abfd, hit_addr);
5288 t0 &= ~0x3fffffc;
5289 t0 |= val & 0x3fffffc;
5290 bfd_put_32 (abfd, t0, hit_addr);
5291 break;
5292
5293 case R_PPC_REL14:
5294 case R_PPC_REL14_BRTAKEN:
5295 case R_PPC_REL14_BRNTAKEN:
5296 t0 = bfd_get_32 (abfd, hit_addr);
5297 t0 &= ~0xfffc;
5298 t0 |= val & 0xfffc;
5299 bfd_put_32 (abfd, t0, hit_addr);
5300 break;
5301 }
5302 }
5303
5304 /* Write out the trampolines. */
5305 changed = fixups != NULL;
5306 if (fixups != NULL)
5307 {
5308 const int *stub;
5309 bfd_byte *dest;
5310 bfd_vma val;
5311 int i, size;
5312
5313 do
5314 {
5315 struct one_fixup *f = fixups;
5316 fixups = fixups->next;
5317 free (f);
5318 }
5319 while (fixups);
5320
5321 contents = bfd_realloc (contents, trampoff);
5322 if (contents == NULL)
5323 goto error_return;
5324
5325 isec->size = (isec->size + 3) & (bfd_vma) -4;
5326 /* Branch around the trampolines. */
5327 val = trampoff - isec->size + 0x48000000;
5328 dest = contents + isec->size;
5329 isec->size = trampoff;
5330 bfd_put_32 (abfd, val, dest);
5331 dest += 4;
5332
5333 if (link_info->shared)
5334 {
5335 stub = shared_stub_entry;
5336 size = ARRAY_SIZE (shared_stub_entry);
5337 }
5338 else
5339 {
5340 stub = stub_entry;
5341 size = ARRAY_SIZE (stub_entry);
5342 }
5343
5344 i = 0;
5345 while (dest < contents + trampoff)
5346 {
5347 bfd_put_32 (abfd, stub[i], dest);
5348 i++;
5349 if (i == size)
5350 i = 0;
5351 dest += 4;
5352 }
5353 BFD_ASSERT (i == 0);
5354 }
5355
5356 if (isymbuf != NULL
5357 && symtab_hdr->contents != (unsigned char *) isymbuf)
5358 {
5359 if (! link_info->keep_memory)
5360 free (isymbuf);
5361 else
5362 {
5363 /* Cache the symbols for elf_link_input_bfd. */
5364 symtab_hdr->contents = (unsigned char *) isymbuf;
5365 }
5366 }
5367
5368 if (contents != NULL
5369 && elf_section_data (isec)->this_hdr.contents != contents)
5370 {
5371 if (!changed && !link_info->keep_memory)
5372 free (contents);
5373 else
5374 {
5375 /* Cache the section contents for elf_link_input_bfd. */
5376 elf_section_data (isec)->this_hdr.contents = contents;
5377 }
5378 }
5379
5380 if (elf_section_data (isec)->relocs != internal_relocs)
5381 {
5382 if (!changed)
5383 free (internal_relocs);
5384 else
5385 elf_section_data (isec)->relocs = internal_relocs;
5386 }
5387
5388 *again = changed;
5389 return TRUE;
5390
5391 error_return:
5392 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
5393 free (isymbuf);
5394 if (contents != NULL
5395 && elf_section_data (isec)->this_hdr.contents != contents)
5396 free (contents);
5397 if (internal_relocs != NULL
5398 && elf_section_data (isec)->relocs != internal_relocs)
5399 free (internal_relocs);
5400 return FALSE;
5401 }
5402
5403 /* What to do when ld finds relocations against symbols defined in
5404 discarded sections. */
5405
5406 static unsigned int
ppc_elf_action_discarded(asection * sec)5407 ppc_elf_action_discarded (asection *sec)
5408 {
5409 if (strcmp (".fixup", sec->name) == 0)
5410 return 0;
5411
5412 if (strcmp (".got2", sec->name) == 0)
5413 return 0;
5414
5415 return _bfd_elf_default_action_discarded (sec);
5416 }
5417
5418 /* Fill in the address for a pointer generated in a linker section. */
5419
5420 static bfd_vma
elf_finish_pointer_linker_section(bfd * input_bfd,elf_linker_section_t * lsect,struct elf_link_hash_entry * h,bfd_vma relocation,const Elf_Internal_Rela * rel)5421 elf_finish_pointer_linker_section (bfd *input_bfd,
5422 elf_linker_section_t *lsect,
5423 struct elf_link_hash_entry *h,
5424 bfd_vma relocation,
5425 const Elf_Internal_Rela *rel)
5426 {
5427 elf_linker_section_pointers_t *linker_section_ptr;
5428
5429 BFD_ASSERT (lsect != NULL);
5430
5431 if (h != NULL)
5432 {
5433 /* Handle global symbol. */
5434 struct ppc_elf_link_hash_entry *eh;
5435
5436 eh = (struct ppc_elf_link_hash_entry *) h;
5437 BFD_ASSERT (eh->elf.def_regular);
5438 linker_section_ptr = eh->linker_section_pointer;
5439 }
5440 else
5441 {
5442 /* Handle local symbol. */
5443 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
5444
5445 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
5446 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
5447 }
5448
5449 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
5450 rel->r_addend,
5451 lsect);
5452 BFD_ASSERT (linker_section_ptr != NULL);
5453
5454 /* Offset will always be a multiple of four, so use the bottom bit
5455 as a "written" flag. */
5456 if ((linker_section_ptr->offset & 1) == 0)
5457 {
5458 bfd_put_32 (lsect->section->owner,
5459 relocation + linker_section_ptr->addend,
5460 lsect->section->contents + linker_section_ptr->offset);
5461 linker_section_ptr->offset += 1;
5462 }
5463
5464 relocation = (lsect->section->output_offset
5465 + linker_section_ptr->offset - 1
5466 - 0x8000);
5467
5468 #ifdef DEBUG
5469 fprintf (stderr,
5470 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
5471 lsect->name, (long) relocation, (long) relocation);
5472 #endif
5473
5474 /* Subtract out the addend, because it will get added back in by the normal
5475 processing. */
5476 return relocation - linker_section_ptr->addend;
5477 }
5478
5479 /* The RELOCATE_SECTION function is called by the ELF backend linker
5480 to handle the relocations for a section.
5481
5482 The relocs are always passed as Rela structures; if the section
5483 actually uses Rel structures, the r_addend field will always be
5484 zero.
5485
5486 This function is responsible for adjust the section contents as
5487 necessary, and (if using Rela relocs and generating a
5488 relocatable output file) adjusting the reloc addend as
5489 necessary.
5490
5491 This function does not have to worry about setting the reloc
5492 address or the reloc symbol index.
5493
5494 LOCAL_SYMS is a pointer to the swapped in local symbols.
5495
5496 LOCAL_SECTIONS is an array giving the section in the input file
5497 corresponding to the st_shndx field of each local symbol.
5498
5499 The global hash table entry for the global symbols can be found
5500 via elf_sym_hashes (input_bfd).
5501
5502 When generating relocatable output, this function must handle
5503 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
5504 going to be the section symbol corresponding to the output
5505 section, which means that the addend must be adjusted
5506 accordingly. */
5507
5508 static bfd_boolean
ppc_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)5509 ppc_elf_relocate_section (bfd *output_bfd,
5510 struct bfd_link_info *info,
5511 bfd *input_bfd,
5512 asection *input_section,
5513 bfd_byte *contents,
5514 Elf_Internal_Rela *relocs,
5515 Elf_Internal_Sym *local_syms,
5516 asection **local_sections)
5517 {
5518 Elf_Internal_Shdr *symtab_hdr;
5519 struct elf_link_hash_entry **sym_hashes;
5520 struct ppc_elf_link_hash_table *htab;
5521 Elf_Internal_Rela *rel;
5522 Elf_Internal_Rela *relend;
5523 Elf_Internal_Rela outrel;
5524 bfd_byte *loc;
5525 asection *got2, *sreloc = NULL;
5526 bfd_vma *local_got_offsets;
5527 bfd_boolean ret = TRUE;
5528
5529 #ifdef DEBUG
5530 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
5531 "%ld relocations%s",
5532 input_bfd, input_section,
5533 (long) input_section->reloc_count,
5534 (info->relocatable) ? " (relocatable)" : "");
5535 #endif
5536
5537 got2 = bfd_get_section_by_name (input_bfd, ".got2");
5538
5539 if (info->relocatable)
5540 {
5541 if (got2 == NULL)
5542 return TRUE;
5543
5544 rel = relocs;
5545 relend = relocs + input_section->reloc_count;
5546 for (; rel < relend; rel++)
5547 {
5548 enum elf_ppc_reloc_type r_type;
5549
5550 r_type = ELF32_R_TYPE (rel->r_info);
5551 if (r_type == R_PPC_PLTREL24
5552 && rel->r_addend >= 32768)
5553 {
5554 /* R_PPC_PLTREL24 is rather special. If non-zero, the
5555 addend specifies the GOT pointer offset within .got2. */
5556 rel->r_addend += got2->output_offset;
5557 }
5558 }
5559 return TRUE;
5560 }
5561
5562 /* Initialize howto table if not already done. */
5563 if (!ppc_elf_howto_table[R_PPC_ADDR32])
5564 ppc_elf_howto_init ();
5565
5566 htab = ppc_elf_hash_table (info);
5567 local_got_offsets = elf_local_got_offsets (input_bfd);
5568 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
5569 sym_hashes = elf_sym_hashes (input_bfd);
5570 rel = relocs;
5571 relend = relocs + input_section->reloc_count;
5572 for (; rel < relend; rel++)
5573 {
5574 enum elf_ppc_reloc_type r_type;
5575 bfd_vma addend;
5576 bfd_reloc_status_type r;
5577 Elf_Internal_Sym *sym;
5578 asection *sec;
5579 struct elf_link_hash_entry *h;
5580 const char *sym_name;
5581 reloc_howto_type *howto;
5582 unsigned long r_symndx;
5583 bfd_vma relocation;
5584 bfd_vma branch_bit, insn, from;
5585 bfd_boolean unresolved_reloc;
5586 bfd_boolean warned;
5587 unsigned int tls_type, tls_mask, tls_gd;
5588
5589 r_type = ELF32_R_TYPE (rel->r_info);
5590 sym = NULL;
5591 sec = NULL;
5592 h = NULL;
5593 unresolved_reloc = FALSE;
5594 warned = FALSE;
5595 r_symndx = ELF32_R_SYM (rel->r_info);
5596
5597 if (r_symndx < symtab_hdr->sh_info)
5598 {
5599 sym = local_syms + r_symndx;
5600 sec = local_sections[r_symndx];
5601 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
5602
5603 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
5604 }
5605 else
5606 {
5607 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
5608 r_symndx, symtab_hdr, sym_hashes,
5609 h, sec, relocation,
5610 unresolved_reloc, warned);
5611
5612 sym_name = h->root.root.string;
5613 }
5614
5615 /* TLS optimizations. Replace instruction sequences and relocs
5616 based on information we collected in tls_optimize. We edit
5617 RELOCS so that --emit-relocs will output something sensible
5618 for the final instruction stream. */
5619 tls_mask = 0;
5620 tls_gd = 0;
5621 if (IS_PPC_TLS_RELOC (r_type))
5622 {
5623 if (h != NULL)
5624 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
5625 else if (local_got_offsets != NULL)
5626 {
5627 char *lgot_masks;
5628 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
5629 tls_mask = lgot_masks[r_symndx];
5630 }
5631 }
5632
5633 /* Ensure reloc mapping code below stays sane. */
5634 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
5635 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
5636 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
5637 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
5638 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
5639 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
5640 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
5641 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
5642 abort ();
5643 switch (r_type)
5644 {
5645 default:
5646 break;
5647
5648 case R_PPC_GOT_TPREL16:
5649 case R_PPC_GOT_TPREL16_LO:
5650 if (tls_mask != 0
5651 && (tls_mask & TLS_TPREL) == 0)
5652 {
5653 bfd_vma insn;
5654 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
5655 insn &= 31 << 21;
5656 insn |= 0x3c020000; /* addis 0,2,0 */
5657 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
5658 r_type = R_PPC_TPREL16_HA;
5659 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5660 }
5661 break;
5662
5663 case R_PPC_TLS:
5664 if (tls_mask != 0
5665 && (tls_mask & TLS_TPREL) == 0)
5666 {
5667 bfd_vma insn, rtra;
5668 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5669 if ((insn & ((31 << 26) | (31 << 11)))
5670 == ((31 << 26) | (2 << 11)))
5671 rtra = insn & ((1 << 26) - (1 << 16));
5672 else if ((insn & ((31 << 26) | (31 << 16)))
5673 == ((31 << 26) | (2 << 16)))
5674 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
5675 else
5676 abort ();
5677 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
5678 /* add -> addi. */
5679 insn = 14 << 26;
5680 else if ((insn & (31 << 1)) == 23 << 1
5681 && ((insn & (31 << 6)) < 14 << 6
5682 || ((insn & (31 << 6)) >= 16 << 6
5683 && (insn & (31 << 6)) < 24 << 6)))
5684 /* load and store indexed -> dform. */
5685 insn = (32 | ((insn >> 6) & 31)) << 26;
5686 else if ((insn & (31 << 1)) == 21 << 1
5687 && (insn & (0x1a << 6)) == 0)
5688 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
5689 insn = (((58 | ((insn >> 6) & 4)) << 26)
5690 | ((insn >> 6) & 1));
5691 else if ((insn & (31 << 1)) == 21 << 1
5692 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
5693 /* lwax -> lwa. */
5694 insn = (58 << 26) | 2;
5695 else
5696 abort ();
5697 insn |= rtra;
5698 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5699 r_type = R_PPC_TPREL16_LO;
5700 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5701 /* Was PPC_TLS which sits on insn boundary, now
5702 PPC_TPREL16_LO which is at insn+2. */
5703 rel->r_offset += 2;
5704 }
5705 break;
5706
5707 case R_PPC_GOT_TLSGD16_HI:
5708 case R_PPC_GOT_TLSGD16_HA:
5709 tls_gd = TLS_TPRELGD;
5710 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5711 goto tls_gdld_hi;
5712 break;
5713
5714 case R_PPC_GOT_TLSLD16_HI:
5715 case R_PPC_GOT_TLSLD16_HA:
5716 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5717 {
5718 tls_gdld_hi:
5719 if ((tls_mask & tls_gd) != 0)
5720 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5721 + R_PPC_GOT_TPREL16);
5722 else
5723 {
5724 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
5725 rel->r_offset -= 2;
5726 r_type = R_PPC_NONE;
5727 }
5728 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5729 }
5730 break;
5731
5732 case R_PPC_GOT_TLSGD16:
5733 case R_PPC_GOT_TLSGD16_LO:
5734 tls_gd = TLS_TPRELGD;
5735 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5736 goto tls_get_addr_check;
5737 break;
5738
5739 case R_PPC_GOT_TLSLD16:
5740 case R_PPC_GOT_TLSLD16_LO:
5741 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5742 {
5743 tls_get_addr_check:
5744 if (rel + 1 < relend)
5745 {
5746 enum elf_ppc_reloc_type r_type2;
5747 unsigned long r_symndx2;
5748 struct elf_link_hash_entry *h2;
5749 bfd_vma insn1, insn2;
5750 bfd_vma offset;
5751
5752 /* The next instruction should be a call to
5753 __tls_get_addr. Peek at the reloc to be sure. */
5754 r_type2 = ELF32_R_TYPE (rel[1].r_info);
5755 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
5756 if (r_symndx2 < symtab_hdr->sh_info
5757 || (r_type2 != R_PPC_REL14
5758 && r_type2 != R_PPC_REL14_BRTAKEN
5759 && r_type2 != R_PPC_REL14_BRNTAKEN
5760 && r_type2 != R_PPC_REL24
5761 && r_type2 != R_PPC_PLTREL24))
5762 break;
5763
5764 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
5765 while (h2->root.type == bfd_link_hash_indirect
5766 || h2->root.type == bfd_link_hash_warning)
5767 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
5768 if (h2 == NULL || h2 != htab->tls_get_addr)
5769 break;
5770
5771 /* OK, it checks out. Replace the call. */
5772 offset = rel[1].r_offset;
5773 insn1 = bfd_get_32 (output_bfd,
5774 contents + rel->r_offset - 2);
5775 if ((tls_mask & tls_gd) != 0)
5776 {
5777 /* IE */
5778 insn1 &= (1 << 26) - 1;
5779 insn1 |= 32 << 26; /* lwz */
5780 insn2 = 0x7c631214; /* add 3,3,2 */
5781 rel[1].r_info = ELF32_R_INFO (r_symndx2, R_PPC_NONE);
5782 rel[1].r_addend = 0;
5783 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5784 + R_PPC_GOT_TPREL16);
5785 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5786 }
5787 else
5788 {
5789 /* LE */
5790 insn1 = 0x3c620000; /* addis 3,2,0 */
5791 insn2 = 0x38630000; /* addi 3,3,0 */
5792 if (tls_gd == 0)
5793 {
5794 /* Was an LD reloc. */
5795 r_symndx = 0;
5796 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
5797 }
5798 r_type = R_PPC_TPREL16_HA;
5799 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5800 rel[1].r_info = ELF32_R_INFO (r_symndx,
5801 R_PPC_TPREL16_LO);
5802 rel[1].r_offset += 2;
5803 rel[1].r_addend = rel->r_addend;
5804 }
5805 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
5806 bfd_put_32 (output_bfd, insn2, contents + offset);
5807 if (tls_gd == 0)
5808 {
5809 /* We changed the symbol on an LD reloc. Start over
5810 in order to get h, sym, sec etc. right. */
5811 rel--;
5812 continue;
5813 }
5814 }
5815 }
5816 break;
5817 }
5818
5819 /* Handle other relocations that tweak non-addend part of insn. */
5820 branch_bit = 0;
5821 switch (r_type)
5822 {
5823 default:
5824 break;
5825
5826 /* Branch taken prediction relocations. */
5827 case R_PPC_ADDR14_BRTAKEN:
5828 case R_PPC_REL14_BRTAKEN:
5829 branch_bit = BRANCH_PREDICT_BIT;
5830 /* Fall thru */
5831
5832 /* Branch not taken prediction relocations. */
5833 case R_PPC_ADDR14_BRNTAKEN:
5834 case R_PPC_REL14_BRNTAKEN:
5835 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5836 insn &= ~BRANCH_PREDICT_BIT;
5837 insn |= branch_bit;
5838
5839 from = (rel->r_offset
5840 + input_section->output_offset
5841 + input_section->output_section->vma);
5842
5843 /* Invert 'y' bit if not the default. */
5844 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
5845 insn ^= BRANCH_PREDICT_BIT;
5846
5847 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5848 break;
5849 }
5850
5851 addend = rel->r_addend;
5852 tls_type = 0;
5853 howto = NULL;
5854 if (r_type < R_PPC_max)
5855 howto = ppc_elf_howto_table[r_type];
5856 switch (r_type)
5857 {
5858 default:
5859 (*_bfd_error_handler)
5860 (_("%B: unknown relocation type %d for symbol %s"),
5861 input_bfd, (int) r_type, sym_name);
5862
5863 bfd_set_error (bfd_error_bad_value);
5864 ret = FALSE;
5865 continue;
5866
5867 case R_PPC_NONE:
5868 case R_PPC_TLS:
5869 case R_PPC_EMB_MRKREF:
5870 case R_PPC_GNU_VTINHERIT:
5871 case R_PPC_GNU_VTENTRY:
5872 continue;
5873
5874 /* GOT16 relocations. Like an ADDR16 using the symbol's
5875 address in the GOT as relocation value instead of the
5876 symbol's value itself. Also, create a GOT entry for the
5877 symbol and put the symbol value there. */
5878 case R_PPC_GOT_TLSGD16:
5879 case R_PPC_GOT_TLSGD16_LO:
5880 case R_PPC_GOT_TLSGD16_HI:
5881 case R_PPC_GOT_TLSGD16_HA:
5882 tls_type = TLS_TLS | TLS_GD;
5883 goto dogot;
5884
5885 case R_PPC_GOT_TLSLD16:
5886 case R_PPC_GOT_TLSLD16_LO:
5887 case R_PPC_GOT_TLSLD16_HI:
5888 case R_PPC_GOT_TLSLD16_HA:
5889 tls_type = TLS_TLS | TLS_LD;
5890 goto dogot;
5891
5892 case R_PPC_GOT_TPREL16:
5893 case R_PPC_GOT_TPREL16_LO:
5894 case R_PPC_GOT_TPREL16_HI:
5895 case R_PPC_GOT_TPREL16_HA:
5896 tls_type = TLS_TLS | TLS_TPREL;
5897 goto dogot;
5898
5899 case R_PPC_GOT_DTPREL16:
5900 case R_PPC_GOT_DTPREL16_LO:
5901 case R_PPC_GOT_DTPREL16_HI:
5902 case R_PPC_GOT_DTPREL16_HA:
5903 tls_type = TLS_TLS | TLS_DTPREL;
5904 goto dogot;
5905
5906 case R_PPC_GOT16:
5907 case R_PPC_GOT16_LO:
5908 case R_PPC_GOT16_HI:
5909 case R_PPC_GOT16_HA:
5910 dogot:
5911 {
5912 /* Relocation is to the entry for this symbol in the global
5913 offset table. */
5914 bfd_vma off;
5915 bfd_vma *offp;
5916 unsigned long indx;
5917
5918 if (htab->got == NULL)
5919 abort ();
5920
5921 indx = 0;
5922 if (tls_type == (TLS_TLS | TLS_LD)
5923 && (h == NULL
5924 || !h->def_dynamic))
5925 offp = &htab->tlsld_got.offset;
5926 else if (h != NULL)
5927 {
5928 bfd_boolean dyn;
5929 dyn = htab->elf.dynamic_sections_created;
5930 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
5931 || (info->shared
5932 && SYMBOL_REFERENCES_LOCAL (info, h)))
5933 /* This is actually a static link, or it is a
5934 -Bsymbolic link and the symbol is defined
5935 locally, or the symbol was forced to be local
5936 because of a version file. */
5937 ;
5938 else
5939 {
5940 indx = h->dynindx;
5941 unresolved_reloc = FALSE;
5942 }
5943 offp = &h->got.offset;
5944 }
5945 else
5946 {
5947 if (local_got_offsets == NULL)
5948 abort ();
5949 offp = &local_got_offsets[r_symndx];
5950 }
5951
5952 /* The offset must always be a multiple of 4. We use the
5953 least significant bit to record whether we have already
5954 processed this entry. */
5955 off = *offp;
5956 if ((off & 1) != 0)
5957 off &= ~1;
5958 else
5959 {
5960 unsigned int tls_m = (tls_mask
5961 & (TLS_LD | TLS_GD | TLS_DTPREL
5962 | TLS_TPREL | TLS_TPRELGD));
5963
5964 if (offp == &htab->tlsld_got.offset)
5965 tls_m = TLS_LD;
5966 else if (h == NULL
5967 || !h->def_dynamic)
5968 tls_m &= ~TLS_LD;
5969
5970 /* We might have multiple got entries for this sym.
5971 Initialize them all. */
5972 do
5973 {
5974 int tls_ty = 0;
5975
5976 if ((tls_m & TLS_LD) != 0)
5977 {
5978 tls_ty = TLS_TLS | TLS_LD;
5979 tls_m &= ~TLS_LD;
5980 }
5981 else if ((tls_m & TLS_GD) != 0)
5982 {
5983 tls_ty = TLS_TLS | TLS_GD;
5984 tls_m &= ~TLS_GD;
5985 }
5986 else if ((tls_m & TLS_DTPREL) != 0)
5987 {
5988 tls_ty = TLS_TLS | TLS_DTPREL;
5989 tls_m &= ~TLS_DTPREL;
5990 }
5991 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
5992 {
5993 tls_ty = TLS_TLS | TLS_TPREL;
5994 tls_m = 0;
5995 }
5996
5997 /* Generate relocs for the dynamic linker. */
5998 if ((info->shared || indx != 0)
5999 && (h == NULL
6000 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6001 || h->root.type != bfd_link_hash_undefweak))
6002 {
6003 outrel.r_offset = (htab->got->output_section->vma
6004 + htab->got->output_offset
6005 + off);
6006 outrel.r_addend = 0;
6007 if (tls_ty & (TLS_LD | TLS_GD))
6008 {
6009 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
6010 if (tls_ty == (TLS_TLS | TLS_GD))
6011 {
6012 loc = htab->relgot->contents;
6013 loc += (htab->relgot->reloc_count++
6014 * sizeof (Elf32_External_Rela));
6015 bfd_elf32_swap_reloca_out (output_bfd,
6016 &outrel, loc);
6017 outrel.r_offset += 4;
6018 outrel.r_info
6019 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6020 }
6021 }
6022 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
6023 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6024 else if (tls_ty == (TLS_TLS | TLS_TPREL))
6025 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
6026 else if (indx == 0)
6027 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
6028 else
6029 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
6030 if (indx == 0)
6031 {
6032 outrel.r_addend += relocation;
6033 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
6034 outrel.r_addend -= htab->elf.tls_sec->vma;
6035 }
6036 loc = htab->relgot->contents;
6037 loc += (htab->relgot->reloc_count++
6038 * sizeof (Elf32_External_Rela));
6039 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6040 }
6041
6042 /* Init the .got section contents if we're not
6043 emitting a reloc. */
6044 else
6045 {
6046 bfd_vma value = relocation;
6047
6048 if (tls_ty == (TLS_TLS | TLS_LD))
6049 value = 1;
6050 else if (tls_ty != 0)
6051 {
6052 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
6053 if (tls_ty == (TLS_TLS | TLS_TPREL))
6054 value += DTP_OFFSET - TP_OFFSET;
6055
6056 if (tls_ty == (TLS_TLS | TLS_GD))
6057 {
6058 bfd_put_32 (output_bfd, value,
6059 htab->got->contents + off + 4);
6060 value = 1;
6061 }
6062 }
6063 bfd_put_32 (output_bfd, value,
6064 htab->got->contents + off);
6065 }
6066
6067 off += 4;
6068 if (tls_ty & (TLS_LD | TLS_GD))
6069 off += 4;
6070 }
6071 while (tls_m != 0);
6072
6073 off = *offp;
6074 *offp = off | 1;
6075 }
6076
6077 if (off >= (bfd_vma) -2)
6078 abort ();
6079
6080 if ((tls_type & TLS_TLS) != 0)
6081 {
6082 if (tls_type != (TLS_TLS | TLS_LD))
6083 {
6084 if ((tls_mask & TLS_LD) != 0
6085 && !(h == NULL
6086 || !h->def_dynamic))
6087 off += 8;
6088 if (tls_type != (TLS_TLS | TLS_GD))
6089 {
6090 if ((tls_mask & TLS_GD) != 0)
6091 off += 8;
6092 if (tls_type != (TLS_TLS | TLS_DTPREL))
6093 {
6094 if ((tls_mask & TLS_DTPREL) != 0)
6095 off += 4;
6096 }
6097 }
6098 }
6099 }
6100
6101 relocation = htab->got->output_offset + off;
6102 relocation -= htab->elf.hgot->root.u.def.value;
6103
6104 /* Addends on got relocations don't make much sense.
6105 x+off@got is actually x@got+off, and since the got is
6106 generated by a hash table traversal, the value in the
6107 got at entry m+n bears little relation to the entry m. */
6108 if (addend != 0)
6109 (*_bfd_error_handler)
6110 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
6111 input_bfd,
6112 input_section,
6113 (long) rel->r_offset,
6114 howto->name,
6115 sym_name);
6116 }
6117 break;
6118
6119 /* Relocations that need no special processing. */
6120 case R_PPC_LOCAL24PC:
6121 /* It makes no sense to point a local relocation
6122 at a symbol not in this object. */
6123 if (unresolved_reloc)
6124 {
6125 if (! (*info->callbacks->undefined_symbol) (info,
6126 h->root.root.string,
6127 input_bfd,
6128 input_section,
6129 rel->r_offset,
6130 TRUE))
6131 return FALSE;
6132 continue;
6133 }
6134 break;
6135
6136 case R_PPC_DTPREL16:
6137 case R_PPC_DTPREL16_LO:
6138 case R_PPC_DTPREL16_HI:
6139 case R_PPC_DTPREL16_HA:
6140 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6141 break;
6142
6143 /* Relocations that may need to be propagated if this is a shared
6144 object. */
6145 case R_PPC_TPREL16:
6146 case R_PPC_TPREL16_LO:
6147 case R_PPC_TPREL16_HI:
6148 case R_PPC_TPREL16_HA:
6149 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6150 /* The TPREL16 relocs shouldn't really be used in shared
6151 libs as they will result in DT_TEXTREL being set, but
6152 support them anyway. */
6153 goto dodyn;
6154
6155 case R_PPC_TPREL32:
6156 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6157 goto dodyn;
6158
6159 case R_PPC_DTPREL32:
6160 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6161 goto dodyn;
6162
6163 case R_PPC_DTPMOD32:
6164 relocation = 1;
6165 addend = 0;
6166 goto dodyn;
6167
6168 case R_PPC_REL16:
6169 case R_PPC_REL16_LO:
6170 case R_PPC_REL16_HI:
6171 case R_PPC_REL16_HA:
6172 break;
6173
6174 case R_PPC_REL24:
6175 case R_PPC_REL32:
6176 case R_PPC_REL14:
6177 case R_PPC_REL14_BRTAKEN:
6178 case R_PPC_REL14_BRNTAKEN:
6179 /* If these relocations are not to a named symbol, they can be
6180 handled right here, no need to bother the dynamic linker. */
6181 if (SYMBOL_REFERENCES_LOCAL (info, h)
6182 || h == htab->elf.hgot)
6183 break;
6184 /* fall through */
6185
6186 /* Relocations that always need to be propagated if this is a shared
6187 object. */
6188 case R_PPC_ADDR32:
6189 case R_PPC_ADDR24:
6190 case R_PPC_ADDR16:
6191 case R_PPC_ADDR16_LO:
6192 case R_PPC_ADDR16_HI:
6193 case R_PPC_ADDR16_HA:
6194 case R_PPC_ADDR14:
6195 case R_PPC_ADDR14_BRTAKEN:
6196 case R_PPC_ADDR14_BRNTAKEN:
6197 case R_PPC_UADDR32:
6198 case R_PPC_UADDR16:
6199 /* r_symndx will be zero only for relocs against symbols
6200 from removed linkonce sections, or sections discarded by
6201 a linker script. */
6202 dodyn:
6203 if (r_symndx == 0)
6204 break;
6205 /* Fall thru. */
6206
6207 if ((input_section->flags & SEC_ALLOC) == 0)
6208 break;
6209 /* Fall thru. */
6210
6211 if ((info->shared
6212 && (h == NULL
6213 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6214 || h->root.type != bfd_link_hash_undefweak)
6215 && (MUST_BE_DYN_RELOC (r_type)
6216 || !SYMBOL_CALLS_LOCAL (info, h)))
6217 || (ELIMINATE_COPY_RELOCS
6218 && !info->shared
6219 && h != NULL
6220 && h->dynindx != -1
6221 && !h->non_got_ref
6222 && h->def_dynamic
6223 && !h->def_regular))
6224 {
6225 int skip;
6226
6227 #ifdef DEBUG
6228 fprintf (stderr, "ppc_elf_relocate_section needs to "
6229 "create relocation for %s\n",
6230 (h && h->root.root.string
6231 ? h->root.root.string : "<unknown>"));
6232 #endif
6233
6234 /* When generating a shared object, these relocations
6235 are copied into the output file to be resolved at run
6236 time. */
6237 if (sreloc == NULL)
6238 {
6239 const char *name;
6240
6241 name = (bfd_elf_string_from_elf_section
6242 (input_bfd,
6243 elf_elfheader (input_bfd)->e_shstrndx,
6244 elf_section_data (input_section)->rel_hdr.sh_name));
6245 if (name == NULL)
6246 return FALSE;
6247
6248 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
6249 && strcmp (bfd_get_section_name (input_bfd,
6250 input_section),
6251 name + 5) == 0);
6252
6253 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
6254 BFD_ASSERT (sreloc != NULL);
6255 }
6256
6257 skip = 0;
6258
6259 outrel.r_offset =
6260 _bfd_elf_section_offset (output_bfd, info, input_section,
6261 rel->r_offset);
6262 if (outrel.r_offset == (bfd_vma) -1
6263 || outrel.r_offset == (bfd_vma) -2)
6264 skip = (int) outrel.r_offset;
6265 outrel.r_offset += (input_section->output_section->vma
6266 + input_section->output_offset);
6267
6268 if (skip)
6269 memset (&outrel, 0, sizeof outrel);
6270 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
6271 {
6272 unresolved_reloc = FALSE;
6273 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
6274 outrel.r_addend = rel->r_addend;
6275 }
6276 else
6277 {
6278 outrel.r_addend = relocation + rel->r_addend;
6279
6280 if (r_type == R_PPC_ADDR32)
6281 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
6282 else
6283 {
6284 long indx;
6285
6286 if (bfd_is_abs_section (sec))
6287 indx = 0;
6288 else if (sec == NULL || sec->owner == NULL)
6289 {
6290 bfd_set_error (bfd_error_bad_value);
6291 return FALSE;
6292 }
6293 else
6294 {
6295 asection *osec;
6296
6297 /* We are turning this relocation into one
6298 against a section symbol. It would be
6299 proper to subtract the symbol's value,
6300 osec->vma, from the emitted reloc addend,
6301 but ld.so expects buggy relocs. */
6302 osec = sec->output_section;
6303 indx = elf_section_data (osec)->dynindx;
6304 BFD_ASSERT (indx > 0);
6305 #ifdef DEBUG
6306 if (indx <= 0)
6307 printf ("indx=%d section=%s flags=%08x name=%s\n",
6308 indx, osec->name, osec->flags,
6309 h->root.root.string);
6310 #endif
6311 }
6312
6313 outrel.r_info = ELF32_R_INFO (indx, r_type);
6314 }
6315 }
6316
6317 loc = sreloc->contents;
6318 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
6319 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6320
6321 if (skip == -1)
6322 continue;
6323
6324 /* This reloc will be computed at runtime. We clear the memory
6325 so that it contains predictable value. */
6326 if (! skip
6327 && ((input_section->flags & SEC_ALLOC) != 0
6328 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
6329 {
6330 relocation = howto->pc_relative ? outrel.r_offset : 0;
6331 addend = 0;
6332 break;
6333 }
6334 }
6335 break;
6336
6337 case R_PPC_RELAX32PC_PLT:
6338 case R_PPC_RELAX32_PLT:
6339 {
6340 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6341
6342 if (htab->plt_type == PLT_NEW)
6343 relocation = (htab->glink->output_section->vma
6344 + htab->glink->output_offset
6345 + ent->glink_offset);
6346 else
6347 relocation = (htab->plt->output_section->vma
6348 + htab->plt->output_offset
6349 + ent->plt.offset);
6350 addend = 0;
6351 }
6352 if (r_type == R_PPC_RELAX32_PLT)
6353 goto relax32;
6354 /* Fall thru */
6355
6356 case R_PPC_RELAX32PC:
6357 relocation -= (input_section->output_section->vma
6358 + input_section->output_offset
6359 + rel->r_offset - 4);
6360 /* Fall thru */
6361
6362 case R_PPC_RELAX32:
6363 relax32:
6364 {
6365 unsigned long t0;
6366 unsigned long t1;
6367
6368 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
6369 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
6370
6371 /* We're clearing the bits for R_PPC_ADDR16_HA
6372 and R_PPC_ADDR16_LO here. */
6373 t0 &= ~0xffff;
6374 t1 &= ~0xffff;
6375
6376 /* t0 is HA, t1 is LO */
6377 relocation += addend;
6378 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
6379 t1 |= relocation & 0xffff;
6380
6381 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
6382 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
6383 }
6384 continue;
6385
6386 /* Indirect .sdata relocation. */
6387 case R_PPC_EMB_SDAI16:
6388 BFD_ASSERT (htab->sdata[0].section != NULL);
6389 relocation
6390 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
6391 h, relocation, rel);
6392 break;
6393
6394 /* Indirect .sdata2 relocation. */
6395 case R_PPC_EMB_SDA2I16:
6396 BFD_ASSERT (htab->sdata[1].section != NULL);
6397 relocation
6398 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
6399 h, relocation, rel);
6400 break;
6401
6402 /* Handle the TOC16 reloc. We want to use the offset within the .got
6403 section, not the actual VMA. This is appropriate when generating
6404 an embedded ELF object, for which the .got section acts like the
6405 AIX .toc section. */
6406 case R_PPC_TOC16: /* phony GOT16 relocations */
6407 BFD_ASSERT (sec != NULL);
6408 BFD_ASSERT (bfd_is_und_section (sec)
6409 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
6410 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
6411
6412 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
6413 break;
6414
6415 case R_PPC_PLTREL24:
6416 /* Relocation is to the entry for this symbol in the
6417 procedure linkage table. */
6418 {
6419 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6420
6421 addend = 0;
6422 if (ent == NULL
6423 || htab->plt == NULL)
6424 {
6425 /* We didn't make a PLT entry for this symbol. This
6426 happens when statically linking PIC code, or when
6427 using -Bsymbolic. */
6428 break;
6429 }
6430
6431 unresolved_reloc = FALSE;
6432 if (htab->plt_type == PLT_NEW)
6433 relocation = (htab->glink->output_section->vma
6434 + htab->glink->output_offset
6435 + ent->glink_offset);
6436 else
6437 relocation = (htab->plt->output_section->vma
6438 + htab->plt->output_offset
6439 + ent->plt.offset);
6440 }
6441 break;
6442
6443 /* Relocate against _SDA_BASE_. */
6444 case R_PPC_SDAREL16:
6445 {
6446 const char *name;
6447 struct elf_link_hash_entry *sh;
6448
6449 BFD_ASSERT (sec != NULL);
6450 name = bfd_get_section_name (abfd, sec->output_section);
6451 if (! ((strncmp (name, ".sdata", 6) == 0
6452 && (name[6] == 0 || name[6] == '.'))
6453 || (strncmp (name, ".sbss", 5) == 0
6454 && (name[5] == 0 || name[5] == '.'))))
6455 {
6456 (*_bfd_error_handler)
6457 (_("%B: the target (%s) of a %s relocation is "
6458 "in the wrong output section (%s)"),
6459 input_bfd,
6460 sym_name,
6461 howto->name,
6462 name);
6463 }
6464 sh = htab->sdata[0].sym;
6465 addend -= (sh->root.u.def.value
6466 + sh->root.u.def.section->output_offset
6467 + sh->root.u.def.section->output_section->vma);
6468 }
6469 break;
6470
6471 /* Relocate against _SDA2_BASE_. */
6472 case R_PPC_EMB_SDA2REL:
6473 {
6474 const char *name;
6475 struct elf_link_hash_entry *sh;
6476
6477 BFD_ASSERT (sec != NULL);
6478 name = bfd_get_section_name (abfd, sec->output_section);
6479 if (! (strncmp (name, ".sdata2", 7) == 0
6480 || strncmp (name, ".sbss2", 6) == 0))
6481 {
6482 (*_bfd_error_handler)
6483 (_("%B: the target (%s) of a %s relocation is "
6484 "in the wrong output section (%s)"),
6485 input_bfd,
6486 sym_name,
6487 howto->name,
6488 name);
6489
6490 bfd_set_error (bfd_error_bad_value);
6491 ret = FALSE;
6492 continue;
6493 }
6494 sh = htab->sdata[1].sym;
6495 addend -= (sh->root.u.def.value
6496 + sh->root.u.def.section->output_offset
6497 + sh->root.u.def.section->output_section->vma);
6498 }
6499 break;
6500
6501 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
6502 case R_PPC_EMB_SDA21:
6503 case R_PPC_EMB_RELSDA:
6504 {
6505 const char *name;
6506 int reg;
6507 struct elf_link_hash_entry *sh;
6508
6509 BFD_ASSERT (sec != NULL);
6510 name = bfd_get_section_name (abfd, sec->output_section);
6511 if (((strncmp (name, ".sdata", 6) == 0
6512 && (name[6] == 0 || name[6] == '.'))
6513 || (strncmp (name, ".sbss", 5) == 0
6514 && (name[5] == 0 || name[5] == '.'))))
6515 {
6516 reg = 13;
6517 sh = htab->sdata[0].sym;
6518 addend -= (sh->root.u.def.value
6519 + sh->root.u.def.section->output_offset
6520 + sh->root.u.def.section->output_section->vma);
6521 }
6522
6523 else if (strncmp (name, ".sdata2", 7) == 0
6524 || strncmp (name, ".sbss2", 6) == 0)
6525 {
6526 reg = 2;
6527 sh = htab->sdata[1].sym;
6528 addend -= (sh->root.u.def.value
6529 + sh->root.u.def.section->output_offset
6530 + sh->root.u.def.section->output_section->vma);
6531 }
6532
6533 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
6534 || strcmp (name, ".PPC.EMB.sbss0") == 0)
6535 {
6536 reg = 0;
6537 }
6538
6539 else
6540 {
6541 (*_bfd_error_handler)
6542 (_("%B: the target (%s) of a %s relocation is "
6543 "in the wrong output section (%s)"),
6544 input_bfd,
6545 sym_name,
6546 howto->name,
6547 name);
6548
6549 bfd_set_error (bfd_error_bad_value);
6550 ret = FALSE;
6551 continue;
6552 }
6553
6554 if (r_type == R_PPC_EMB_SDA21)
6555 { /* fill in register field */
6556 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6557 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
6558 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6559 }
6560 }
6561 break;
6562
6563 /* Relocate against the beginning of the section. */
6564 case R_PPC_SECTOFF:
6565 case R_PPC_SECTOFF_LO:
6566 case R_PPC_SECTOFF_HI:
6567 case R_PPC_SECTOFF_HA:
6568 BFD_ASSERT (sec != NULL);
6569 addend -= sec->output_section->vma;
6570 break;
6571
6572 /* Negative relocations. */
6573 case R_PPC_EMB_NADDR32:
6574 case R_PPC_EMB_NADDR16:
6575 case R_PPC_EMB_NADDR16_LO:
6576 case R_PPC_EMB_NADDR16_HI:
6577 case R_PPC_EMB_NADDR16_HA:
6578 addend -= 2 * relocation;
6579 break;
6580
6581 case R_PPC_COPY:
6582 case R_PPC_GLOB_DAT:
6583 case R_PPC_JMP_SLOT:
6584 case R_PPC_RELATIVE:
6585 case R_PPC_PLT32:
6586 case R_PPC_PLTREL32:
6587 case R_PPC_PLT16_LO:
6588 case R_PPC_PLT16_HI:
6589 case R_PPC_PLT16_HA:
6590 case R_PPC_ADDR30:
6591 case R_PPC_EMB_RELSEC16:
6592 case R_PPC_EMB_RELST_LO:
6593 case R_PPC_EMB_RELST_HI:
6594 case R_PPC_EMB_RELST_HA:
6595 case R_PPC_EMB_BIT_FLD:
6596 (*_bfd_error_handler)
6597 (_("%B: relocation %s is not yet supported for symbol %s."),
6598 input_bfd,
6599 howto->name,
6600 sym_name);
6601
6602 bfd_set_error (bfd_error_invalid_operation);
6603 ret = FALSE;
6604 continue;
6605 }
6606
6607 /* Do any further special processing. */
6608 switch (r_type)
6609 {
6610 default:
6611 break;
6612
6613 case R_PPC_ADDR16_HA:
6614 case R_PPC_REL16_HA:
6615 case R_PPC_GOT16_HA:
6616 case R_PPC_PLT16_HA:
6617 case R_PPC_SECTOFF_HA:
6618 case R_PPC_TPREL16_HA:
6619 case R_PPC_DTPREL16_HA:
6620 case R_PPC_GOT_TLSGD16_HA:
6621 case R_PPC_GOT_TLSLD16_HA:
6622 case R_PPC_GOT_TPREL16_HA:
6623 case R_PPC_GOT_DTPREL16_HA:
6624 case R_PPC_EMB_NADDR16_HA:
6625 case R_PPC_EMB_RELST_HA:
6626 /* It's just possible that this symbol is a weak symbol
6627 that's not actually defined anywhere. In that case,
6628 'sec' would be NULL, and we should leave the symbol
6629 alone (it will be set to zero elsewhere in the link). */
6630 if (sec != NULL)
6631 /* Add 0x10000 if sign bit in 0:15 is set.
6632 Bits 0:15 are not used. */
6633 addend += 0x8000;
6634 break;
6635 }
6636
6637 #ifdef DEBUG
6638 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
6639 "offset = %ld, addend = %ld\n",
6640 howto->name,
6641 (int) r_type,
6642 sym_name,
6643 r_symndx,
6644 (long) rel->r_offset,
6645 (long) addend);
6646 #endif
6647
6648 if (unresolved_reloc
6649 && !((input_section->flags & SEC_DEBUGGING) != 0
6650 && h->def_dynamic))
6651 {
6652 (*_bfd_error_handler)
6653 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
6654 input_bfd,
6655 input_section,
6656 (long) rel->r_offset,
6657 howto->name,
6658 sym_name);
6659 ret = FALSE;
6660 }
6661
6662 r = _bfd_final_link_relocate (howto,
6663 input_bfd,
6664 input_section,
6665 contents,
6666 rel->r_offset,
6667 relocation,
6668 addend);
6669
6670 if (r != bfd_reloc_ok)
6671 {
6672 if (r == bfd_reloc_overflow)
6673 {
6674 if (warned)
6675 continue;
6676 if (h != NULL
6677 && h->root.type == bfd_link_hash_undefweak
6678 && howto->pc_relative)
6679 {
6680 /* Assume this is a call protected by other code that
6681 detect the symbol is undefined. If this is the case,
6682 we can safely ignore the overflow. If not, the
6683 program is hosed anyway, and a little warning isn't
6684 going to help. */
6685
6686 continue;
6687 }
6688
6689 if (! (*info->callbacks->reloc_overflow) (info,
6690 (h ? &h->root : NULL),
6691 sym_name,
6692 howto->name,
6693 rel->r_addend,
6694 input_bfd,
6695 input_section,
6696 rel->r_offset))
6697 return FALSE;
6698 }
6699 else
6700 {
6701 (*_bfd_error_handler)
6702 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
6703 input_bfd, input_section,
6704 (long) rel->r_offset, howto->name, sym_name, (int) r);
6705 ret = FALSE;
6706 }
6707 }
6708 }
6709
6710 #ifdef DEBUG
6711 fprintf (stderr, "\n");
6712 #endif
6713
6714 return ret;
6715 }
6716
6717 #define PPC_LO(v) ((v) & 0xffff)
6718 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6719 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6720
6721 /* Finish up dynamic symbol handling. We set the contents of various
6722 dynamic sections here. */
6723
6724 static bfd_boolean
ppc_elf_finish_dynamic_symbol(bfd * output_bfd,struct bfd_link_info * info,struct elf_link_hash_entry * h,Elf_Internal_Sym * sym)6725 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
6726 struct bfd_link_info *info,
6727 struct elf_link_hash_entry *h,
6728 Elf_Internal_Sym *sym)
6729 {
6730 struct ppc_elf_link_hash_table *htab;
6731 struct plt_entry *ent;
6732 bfd_boolean doneone;
6733
6734 #ifdef DEBUG
6735 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
6736 h->root.root.string);
6737 #endif
6738
6739 htab = ppc_elf_hash_table (info);
6740 BFD_ASSERT (htab->elf.dynobj != NULL);
6741
6742 doneone = FALSE;
6743 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6744 if (ent->plt.offset != (bfd_vma) -1)
6745 {
6746 if (!doneone)
6747 {
6748 Elf_Internal_Rela rela;
6749 bfd_byte *loc;
6750 bfd_vma reloc_index;
6751
6752 if (htab->plt_type == PLT_NEW)
6753 reloc_index = ent->plt.offset / 4;
6754 else
6755 {
6756 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
6757 / htab->plt_slot_size);
6758 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
6759 && htab->plt_type == PLT_OLD)
6760 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
6761 }
6762
6763 /* This symbol has an entry in the procedure linkage table.
6764 Set it up. */
6765 if (htab->plt_type == PLT_VXWORKS)
6766 {
6767 bfd_vma got_offset;
6768 const bfd_vma *plt_entry;
6769
6770 /* The first three entries in .got.plt are reserved. */
6771 got_offset = (reloc_index + 3) * 4;
6772
6773 /* Use the right PLT. */
6774 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
6775 : ppc_elf_vxworks_plt_entry;
6776
6777 /* Fill in the .plt on VxWorks. */
6778 if (info->shared)
6779 {
6780 bfd_vma got_offset_hi = (got_offset >> 16)
6781 + ((got_offset & 0x8000) >> 15);
6782
6783 bfd_put_32 (output_bfd,
6784 plt_entry[0] | (got_offset_hi & 0xffff),
6785 htab->plt->contents + ent->plt.offset + 0);
6786 bfd_put_32 (output_bfd,
6787 plt_entry[1] | (got_offset & 0xffff),
6788 htab->plt->contents + ent->plt.offset + 4);
6789 }
6790 else
6791 {
6792 bfd_vma got_loc
6793 = (got_offset
6794 + htab->elf.hgot->root.u.def.value
6795 + htab->elf.hgot->root.u.def.section->output_offset
6796 + htab->elf.hgot->root.u.def.section->output_section->vma);
6797 bfd_vma got_loc_hi = (got_loc >> 16)
6798 + ((got_loc & 0x8000) >> 15);
6799
6800 bfd_put_32 (output_bfd,
6801 plt_entry[0] | (got_loc_hi & 0xffff),
6802 htab->plt->contents + ent->plt.offset + 0);
6803 bfd_put_32 (output_bfd,
6804 plt_entry[1] | (got_loc & 0xffff),
6805 htab->plt->contents + ent->plt.offset + 4);
6806 }
6807
6808 bfd_put_32 (output_bfd, plt_entry[2],
6809 htab->plt->contents + ent->plt.offset + 8);
6810 bfd_put_32 (output_bfd, plt_entry[3],
6811 htab->plt->contents + ent->plt.offset + 12);
6812
6813 /* This instruction is an immediate load. The value loaded is
6814 the byte offset of the R_PPC_JMP_SLOT relocation from the
6815 start of the .rela.plt section. The value is stored in the
6816 low-order 16 bits of the load instruction. */
6817 /* NOTE: It appears that this is now an index rather than a
6818 prescaled offset. */
6819 bfd_put_32 (output_bfd,
6820 plt_entry[4] | reloc_index,
6821 htab->plt->contents + ent->plt.offset + 16);
6822 /* This instruction is a PC-relative branch whose target is
6823 the start of the PLT section. The address of this branch
6824 instruction is 20 bytes beyond the start of this PLT entry.
6825 The address is encoded in bits 6-29, inclusive. The value
6826 stored is right-shifted by two bits, permitting a 26-bit
6827 offset. */
6828 bfd_put_32 (output_bfd,
6829 (plt_entry[5]
6830 | (-(ent->plt.offset + 20) & 0x03fffffc)),
6831 htab->plt->contents + ent->plt.offset + 20);
6832 bfd_put_32 (output_bfd, plt_entry[6],
6833 htab->plt->contents + ent->plt.offset + 24);
6834 bfd_put_32 (output_bfd, plt_entry[7],
6835 htab->plt->contents + ent->plt.offset + 28);
6836
6837 /* Fill in the GOT entry corresponding to this PLT slot with
6838 the address immediately after the the "bctr" instruction
6839 in this PLT entry. */
6840 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
6841 + htab->plt->output_offset
6842 + ent->plt.offset + 16),
6843 htab->sgotplt->contents + got_offset);
6844
6845 if (!info->shared)
6846 {
6847 /* Fill in a couple of entries in .rela.plt.unloaded. */
6848 loc = htab->srelplt2->contents
6849 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
6850 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
6851 * sizeof (Elf32_External_Rela));
6852
6853 /* Provide the @ha relocation for the first instruction. */
6854 rela.r_offset = (htab->plt->output_section->vma
6855 + htab->plt->output_offset
6856 + ent->plt.offset + 2);
6857 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
6858 R_PPC_ADDR16_HA);
6859 rela.r_addend = got_offset;
6860 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6861 loc += sizeof (Elf32_External_Rela);
6862
6863 /* Provide the @l relocation for the second instruction. */
6864 rela.r_offset = (htab->plt->output_section->vma
6865 + htab->plt->output_offset
6866 + ent->plt.offset + 6);
6867 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
6868 R_PPC_ADDR16_LO);
6869 rela.r_addend = got_offset;
6870 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6871 loc += sizeof (Elf32_External_Rela);
6872
6873 /* Provide a relocation for the GOT entry corresponding to this
6874 PLT slot. Point it at the middle of the .plt entry. */
6875 rela.r_offset = (htab->sgotplt->output_section->vma
6876 + htab->sgotplt->output_offset
6877 + got_offset);
6878 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
6879 R_PPC_ADDR32);
6880 rela.r_addend = ent->plt.offset + 16;
6881 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6882 }
6883
6884 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
6885 In particular, the offset for the relocation is not the
6886 address of the PLT entry for this function, as specified
6887 by the ABI. Instead, the offset is set to the address of
6888 the GOT slot for this function. See EABI 4.4.4.1. */
6889 rela.r_offset = (htab->sgotplt->output_section->vma
6890 + htab->sgotplt->output_offset
6891 + got_offset);
6892
6893 }
6894 else
6895 {
6896 rela.r_offset = (htab->plt->output_section->vma
6897 + htab->plt->output_offset
6898 + ent->plt.offset);
6899 if (htab->plt_type == PLT_OLD)
6900 {
6901 /* We don't need to fill in the .plt. The ppc dynamic
6902 linker will fill it in. */
6903 }
6904 else
6905 {
6906 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
6907 + htab->glink->output_section->vma
6908 + htab->glink->output_offset);
6909 bfd_put_32 (output_bfd, val,
6910 htab->plt->contents + ent->plt.offset);
6911 }
6912 }
6913
6914 /* Fill in the entry in the .rela.plt section. */
6915 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
6916 rela.r_addend = 0;
6917
6918 loc = (htab->relplt->contents
6919 + reloc_index * sizeof (Elf32_External_Rela));
6920 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6921
6922 if (!h->def_regular)
6923 {
6924 /* Mark the symbol as undefined, rather than as defined in
6925 the .plt section. Leave the value alone. */
6926 sym->st_shndx = SHN_UNDEF;
6927 /* If the symbol is weak, we do need to clear the value.
6928 Otherwise, the PLT entry would provide a definition for
6929 the symbol even if the symbol wasn't defined anywhere,
6930 and so the symbol would never be NULL. */
6931 if (!h->ref_regular_nonweak)
6932 sym->st_value = 0;
6933 }
6934 doneone = TRUE;
6935 }
6936
6937 if (htab->plt_type == PLT_NEW)
6938 {
6939 bfd_vma plt;
6940 unsigned char *p;
6941
6942 plt = (ent->plt.offset
6943 + htab->plt->output_section->vma
6944 + htab->plt->output_offset);
6945 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
6946
6947 if (info->shared || info->pie)
6948 {
6949 bfd_vma got = 0;
6950
6951 if (ent->addend >= 32768)
6952 got = (ent->addend
6953 + ent->sec->output_section->vma
6954 + ent->sec->output_offset);
6955 else if (htab->elf.hgot != NULL)
6956 got = (htab->elf.hgot->root.u.def.value
6957 + htab->elf.hgot->root.u.def.section->output_section->vma
6958 + htab->elf.hgot->root.u.def.section->output_offset);
6959
6960 plt -= got;
6961
6962 if (plt + 0x8000 < 0x10000)
6963 {
6964 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
6965 p += 4;
6966 bfd_put_32 (output_bfd, MTCTR_11, p);
6967 p += 4;
6968 bfd_put_32 (output_bfd, BCTR, p);
6969 p += 4;
6970 bfd_put_32 (output_bfd, NOP, p);
6971 p += 4;
6972 }
6973 else
6974 {
6975 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
6976 p += 4;
6977 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6978 p += 4;
6979 bfd_put_32 (output_bfd, MTCTR_11, p);
6980 p += 4;
6981 bfd_put_32 (output_bfd, BCTR, p);
6982 p += 4;
6983 }
6984 }
6985 else
6986 {
6987 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
6988 p += 4;
6989 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6990 p += 4;
6991 bfd_put_32 (output_bfd, MTCTR_11, p);
6992 p += 4;
6993 bfd_put_32 (output_bfd, BCTR, p);
6994 p += 4;
6995
6996 /* We only need one non-PIC glink stub. */
6997 break;
6998 }
6999 }
7000 else
7001 break;
7002 }
7003
7004 if (h->needs_copy)
7005 {
7006 asection *s;
7007 Elf_Internal_Rela rela;
7008 bfd_byte *loc;
7009
7010 /* This symbols needs a copy reloc. Set it up. */
7011
7012 #ifdef DEBUG
7013 fprintf (stderr, ", copy");
7014 #endif
7015
7016 BFD_ASSERT (h->dynindx != -1);
7017
7018 if (ppc_elf_hash_entry (h)->has_sda_refs)
7019 s = htab->relsbss;
7020 else
7021 s = htab->relbss;
7022 BFD_ASSERT (s != NULL);
7023
7024 rela.r_offset = (h->root.u.def.value
7025 + h->root.u.def.section->output_section->vma
7026 + h->root.u.def.section->output_offset);
7027 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
7028 rela.r_addend = 0;
7029 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
7030 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7031 }
7032
7033 #ifdef DEBUG
7034 fprintf (stderr, "\n");
7035 #endif
7036
7037 /* Mark some specially defined symbols as absolute. */
7038 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
7039 || (!htab->is_vxworks
7040 && (h == htab->elf.hgot
7041 || strcmp (h->root.root.string,
7042 "_PROCEDURE_LINKAGE_TABLE_") == 0)))
7043 sym->st_shndx = SHN_ABS;
7044
7045 return TRUE;
7046 }
7047
7048 static enum elf_reloc_type_class
ppc_elf_reloc_type_class(const Elf_Internal_Rela * rela)7049 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
7050 {
7051 switch (ELF32_R_TYPE (rela->r_info))
7052 {
7053 case R_PPC_RELATIVE:
7054 return reloc_class_relative;
7055 case R_PPC_REL24:
7056 case R_PPC_ADDR24:
7057 case R_PPC_JMP_SLOT:
7058 return reloc_class_plt;
7059 case R_PPC_COPY:
7060 return reloc_class_copy;
7061 default:
7062 return reloc_class_normal;
7063 }
7064 }
7065
7066 /* Finish up the dynamic sections. */
7067
7068 static bfd_boolean
ppc_elf_finish_dynamic_sections(bfd * output_bfd,struct bfd_link_info * info)7069 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
7070 struct bfd_link_info *info)
7071 {
7072 asection *sdyn;
7073 asection *splt;
7074 struct ppc_elf_link_hash_table *htab;
7075 bfd_vma got;
7076 bfd * dynobj;
7077
7078 #ifdef DEBUG
7079 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
7080 #endif
7081
7082 htab = ppc_elf_hash_table (info);
7083 dynobj = elf_hash_table (info)->dynobj;
7084 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
7085 if (htab->is_vxworks)
7086 splt = bfd_get_section_by_name (dynobj, ".plt");
7087 else
7088 splt = NULL;
7089
7090 got = 0;
7091 if (htab->elf.hgot != NULL)
7092 got = (htab->elf.hgot->root.u.def.value
7093 + htab->elf.hgot->root.u.def.section->output_section->vma
7094 + htab->elf.hgot->root.u.def.section->output_offset);
7095
7096 if (htab->elf.dynamic_sections_created)
7097 {
7098 Elf32_External_Dyn *dyncon, *dynconend;
7099
7100 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
7101
7102 dyncon = (Elf32_External_Dyn *) sdyn->contents;
7103 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
7104 for (; dyncon < dynconend; dyncon++)
7105 {
7106 Elf_Internal_Dyn dyn;
7107 asection *s;
7108
7109 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
7110
7111 switch (dyn.d_tag)
7112 {
7113 case DT_PLTGOT:
7114 if (htab->is_vxworks)
7115 s = htab->sgotplt;
7116 else
7117 s = htab->plt;
7118 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7119 break;
7120
7121 case DT_PLTRELSZ:
7122 dyn.d_un.d_val = htab->relplt->size;
7123 break;
7124
7125 case DT_JMPREL:
7126 s = htab->relplt;
7127 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7128 break;
7129
7130 case DT_PPC_GOT:
7131 dyn.d_un.d_ptr = got;
7132 break;
7133
7134 case DT_RELASZ:
7135 if (htab->is_vxworks)
7136 {
7137 if (htab->relplt)
7138 dyn.d_un.d_ptr -= htab->relplt->size;
7139 break;
7140 }
7141 continue;
7142
7143 default:
7144 continue;
7145 }
7146
7147 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7148 }
7149 }
7150
7151 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
7152 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
7153 if (htab->got != NULL)
7154 {
7155 unsigned char *p = htab->got->contents;
7156 bfd_vma val;
7157
7158 p += htab->elf.hgot->root.u.def.value;
7159 if (htab->plt_type == PLT_OLD)
7160 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, p - 4);
7161
7162 val = 0;
7163 if (sdyn != NULL)
7164 val = sdyn->output_section->vma + sdyn->output_offset;
7165 bfd_put_32 (output_bfd, val, p);
7166
7167 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
7168 }
7169
7170 /* Fill in the first entry in the VxWorks procedure linkage table. */
7171 if (splt && splt->size > 0)
7172 {
7173 /* Use the right PLT. */
7174 static const bfd_vma *plt_entry = NULL;
7175 plt_entry = info->shared ?
7176 ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
7177
7178 if (!info->shared)
7179 {
7180 bfd_vma got_value =
7181 (htab->elf.hgot->root.u.def.section->output_section->vma
7182 + htab->elf.hgot->root.u.def.section->output_offset
7183 + htab->elf.hgot->root.u.def.value);
7184 bfd_vma got_hi = (got_value >> 16) + ((got_value & 0x8000) >> 15);
7185
7186 bfd_put_32 (output_bfd, plt_entry[0] | (got_hi & 0xffff),
7187 splt->contents + 0);
7188 bfd_put_32 (output_bfd, plt_entry[1] | (got_value & 0xffff),
7189 splt->contents + 4);
7190 }
7191 else
7192 {
7193 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
7194 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
7195 }
7196 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
7197 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
7198 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
7199 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
7200 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
7201 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
7202
7203 if (! info->shared)
7204 {
7205 Elf_Internal_Rela rela;
7206 bfd_byte *loc;
7207
7208 loc = htab->srelplt2->contents;
7209
7210 /* Output the @ha relocation for the first instruction. */
7211 rela.r_offset = (htab->plt->output_section->vma
7212 + htab->plt->output_offset
7213 + 2);
7214 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7215 rela.r_addend = 0;
7216 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7217 loc += sizeof (Elf32_External_Rela);
7218
7219 /* Output the @l relocation for the second instruction. */
7220 rela.r_offset = (htab->plt->output_section->vma
7221 + htab->plt->output_offset
7222 + 6);
7223 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7224 rela.r_addend = 0;
7225 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7226 loc += sizeof (Elf32_External_Rela);
7227
7228 /* Fix up the remaining relocations. They may have the wrong
7229 symbol index for _G_O_T_ or _P_L_T_ depending on the order
7230 in which symbols were output. */
7231 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
7232 {
7233 Elf_Internal_Rela rel;
7234
7235 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7236 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7237 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7238 loc += sizeof (Elf32_External_Rela);
7239
7240 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7241 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7242 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7243 loc += sizeof (Elf32_External_Rela);
7244
7245 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7246 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
7247 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7248 loc += sizeof (Elf32_External_Rela);
7249 }
7250 }
7251 }
7252
7253 if (htab->glink != NULL && htab->glink->contents != NULL)
7254 {
7255 unsigned char *p;
7256 unsigned char *endp;
7257 bfd_vma res0;
7258 unsigned int i;
7259
7260 /*
7261 * PIC glink code is the following:
7262 *
7263 * # ith PLT code stub.
7264 * addis 11,30,(plt+(i-1)*4-got)@ha
7265 * lwz 11,(plt+(i-1)*4-got)@l(11)
7266 * mtctr 11
7267 * bctr
7268 *
7269 * # A table of branches, one for each plt entry.
7270 * # The idea is that the plt call stub loads ctr (and r11) with these
7271 * # addresses, so (r11 - res_0) gives the plt index * 4.
7272 * res_0: b PLTresolve
7273 * res_1: b PLTresolve
7274 * .
7275 * # Some number of entries towards the end can be nops
7276 * res_n_m3: nop
7277 * res_n_m2: nop
7278 * res_n_m1:
7279 *
7280 * PLTresolve:
7281 * addis 11,11,(1f-res_0)@ha
7282 * mflr 0
7283 * bcl 20,31,1f
7284 * 1: addi 11,11,(1b-res_0)@l
7285 * mflr 12
7286 * mtlr 0
7287 * sub 11,11,12 # r11 = index * 4
7288 * addis 12,12,(got+4-1b)@ha
7289 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
7290 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
7291 * mtctr 0
7292 * add 0,11,11
7293 * add 11,0,11 # r11 = index * 12 = reloc offset.
7294 * bctr
7295 */
7296 static const unsigned int pic_plt_resolve[] =
7297 {
7298 ADDIS_11_11,
7299 MFLR_0,
7300 BCL_20_31,
7301 ADDI_11_11,
7302 MFLR_12,
7303 MTLR_0,
7304 SUB_11_11_12,
7305 ADDIS_12_12,
7306 LWZ_0_12,
7307 LWZ_12_12,
7308 MTCTR_0,
7309 ADD_0_11_11,
7310 ADD_11_0_11,
7311 BCTR,
7312 NOP,
7313 NOP
7314 };
7315
7316 static const unsigned int plt_resolve[] =
7317 {
7318 LIS_12,
7319 ADDIS_11_11,
7320 LWZ_0_12,
7321 ADDI_11_11,
7322 MTCTR_0,
7323 ADD_0_11_11,
7324 LWZ_12_12,
7325 ADD_11_0_11,
7326 BCTR,
7327 NOP,
7328 NOP,
7329 NOP,
7330 NOP,
7331 NOP,
7332 NOP,
7333 NOP
7334 };
7335
7336 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
7337 abort ();
7338 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
7339 abort ();
7340
7341 /* Build the branch table, one for each plt entry (less one),
7342 and perhaps some padding. */
7343 p = htab->glink->contents;
7344 p += htab->glink_pltresolve;
7345 endp = htab->glink->contents;
7346 endp += htab->glink->size - GLINK_PLTRESOLVE;
7347 while (p < endp - 8 * 4)
7348 {
7349 bfd_put_32 (output_bfd, B + endp - p, p);
7350 p += 4;
7351 }
7352 while (p < endp)
7353 {
7354 bfd_put_32 (output_bfd, NOP, p);
7355 p += 4;
7356 }
7357
7358 res0 = (htab->glink_pltresolve
7359 + htab->glink->output_section->vma
7360 + htab->glink->output_offset);
7361
7362 /* Last comes the PLTresolve stub. */
7363 if (info->shared || info->pie)
7364 {
7365 bfd_vma bcl;
7366
7367 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
7368 {
7369 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
7370 p += 4;
7371 }
7372 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
7373
7374 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
7375 + htab->glink->output_section->vma
7376 + htab->glink->output_offset);
7377
7378 bfd_put_32 (output_bfd,
7379 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
7380 bfd_put_32 (output_bfd,
7381 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
7382 bfd_put_32 (output_bfd,
7383 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
7384 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
7385 {
7386 bfd_put_32 (output_bfd,
7387 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7388 bfd_put_32 (output_bfd,
7389 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
7390 }
7391 else
7392 {
7393 bfd_put_32 (output_bfd,
7394 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7395 bfd_put_32 (output_bfd,
7396 LWZ_12_12 + 4, p + 9*4);
7397 }
7398 }
7399 else
7400 {
7401 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
7402 {
7403 bfd_put_32 (output_bfd, plt_resolve[i], p);
7404 p += 4;
7405 }
7406 p -= 4 * ARRAY_SIZE (plt_resolve);
7407
7408 bfd_put_32 (output_bfd,
7409 LIS_12 + PPC_HA (got + 4), p + 0*4);
7410 bfd_put_32 (output_bfd,
7411 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
7412 bfd_put_32 (output_bfd,
7413 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
7414 if (PPC_HA (got + 4) == PPC_HA (got + 8))
7415 {
7416 bfd_put_32 (output_bfd,
7417 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
7418 bfd_put_32 (output_bfd,
7419 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
7420 }
7421 else
7422 {
7423 bfd_put_32 (output_bfd,
7424 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
7425 bfd_put_32 (output_bfd,
7426 LWZ_12_12 + 4, p + 6*4);
7427 }
7428 }
7429 }
7430
7431 return TRUE;
7432 }
7433
7434 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
7435 #define TARGET_LITTLE_NAME "elf32-powerpcle"
7436 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
7437 #define TARGET_BIG_NAME "elf32-powerpc"
7438 #define ELF_ARCH bfd_arch_powerpc
7439 #define ELF_MACHINE_CODE EM_PPC
7440 #ifdef __QNXTARGET__
7441 #define ELF_MAXPAGESIZE 0x1000
7442 #else
7443 #define ELF_MAXPAGESIZE 0x10000
7444 #endif
7445 #define ELF_MINPAGESIZE 0x1000
7446 #define elf_info_to_howto ppc_elf_info_to_howto
7447
7448 #ifdef EM_CYGNUS_POWERPC
7449 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
7450 #endif
7451
7452 #ifdef EM_PPC_OLD
7453 #define ELF_MACHINE_ALT2 EM_PPC_OLD
7454 #endif
7455
7456 #define elf_backend_plt_not_loaded 1
7457 #define elf_backend_can_gc_sections 0
7458 #define elf_backend_can_refcount 1
7459 #define elf_backend_rela_normal 1
7460
7461 #define bfd_elf32_mkobject ppc_elf_mkobject
7462 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
7463 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
7464 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
7465 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
7466 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
7467
7468 #define elf_backend_object_p ppc_elf_object_p
7469 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
7470 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
7471 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
7472 #define elf_backend_relocate_section ppc_elf_relocate_section
7473 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
7474 #define elf_backend_check_relocs ppc_elf_check_relocs
7475 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
7476 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
7477 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
7478 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
7479 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
7480 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
7481 #define elf_backend_fake_sections ppc_elf_fake_sections
7482 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
7483 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
7484 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
7485 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
7486 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
7487 #define elf_backend_final_write_processing ppc_elf_final_write_processing
7488 #define elf_backend_write_section ppc_elf_write_section
7489 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
7490 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
7491 #define elf_backend_action_discarded ppc_elf_action_discarded
7492
7493 #include "elf32-target.h"
7494
7495 /* VxWorks Target */
7496
7497 #undef TARGET_LITTLE_SYM
7498 #undef TARGET_LITTLE_NAME
7499
7500 #undef TARGET_BIG_SYM
7501 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
7502 #undef TARGET_BIG_NAME
7503 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
7504
7505 /* VxWorks uses the elf default section flags for .plt. */
7506 static const struct bfd_elf_special_section *
ppc_elf_vxworks_get_sec_type_attr(bfd * abfd ATTRIBUTE_UNUSED,asection * sec)7507 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
7508 {
7509 if (sec->name == NULL)
7510 return NULL;
7511
7512 if (strcmp (sec->name, ".plt") == 0)
7513 return _bfd_elf_get_sec_type_attr (abfd, sec);
7514
7515 return ppc_elf_get_sec_type_attr (abfd, sec);
7516 }
7517
7518 /* Like ppc_elf_link_hash_table_create, but overrides
7519 appropriately for VxWorks. */
7520 static struct bfd_link_hash_table *
ppc_elf_vxworks_link_hash_table_create(bfd * abfd)7521 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
7522 {
7523 struct bfd_link_hash_table *ret;
7524
7525 ret = ppc_elf_link_hash_table_create (abfd);
7526 if (ret)
7527 {
7528 struct ppc_elf_link_hash_table *htab
7529 = (struct ppc_elf_link_hash_table *)ret;
7530 htab->is_vxworks = 1;
7531 htab->plt_type = PLT_VXWORKS;
7532 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
7533 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
7534 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
7535 }
7536 return ret;
7537 }
7538
7539 /* Tweak magic VxWorks symbols as they are loaded. */
7540 static bfd_boolean
ppc_elf_vxworks_add_symbol_hook(bfd * abfd,struct bfd_link_info * info,Elf_Internal_Sym * sym,const char ** namep ATTRIBUTE_UNUSED,flagword * flagsp ATTRIBUTE_UNUSED,asection ** secp,bfd_vma * valp)7541 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
7542 struct bfd_link_info *info,
7543 Elf_Internal_Sym *sym,
7544 const char **namep ATTRIBUTE_UNUSED,
7545 flagword *flagsp ATTRIBUTE_UNUSED,
7546 asection **secp,
7547 bfd_vma *valp)
7548 {
7549 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
7550 valp))
7551 return FALSE;
7552
7553 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
7554 }
7555
7556 static void
ppc_elf_vxworks_final_write_processing(bfd * abfd,bfd_boolean linker)7557 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
7558 {
7559 ppc_elf_final_write_processing(abfd, linker);
7560 elf_vxworks_final_write_processing(abfd, linker);
7561 }
7562
7563 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
7564 define it. */
7565 #undef elf_backend_want_plt_sym
7566 #define elf_backend_want_plt_sym 1
7567 #undef elf_backend_want_got_plt
7568 #define elf_backend_want_got_plt 1
7569 #undef elf_backend_got_symbol_offset
7570 #define elf_backend_got_symbol_offset 0
7571 #undef elf_backend_plt_not_loaded
7572 #define elf_backend_plt_not_loaded 0
7573 #undef elf_backend_plt_readonly
7574 #define elf_backend_plt_readonly 1
7575 #undef elf_backend_got_header_size
7576 #define elf_backend_got_header_size 12
7577
7578 #undef bfd_elf32_bfd_link_hash_table_create
7579 #define bfd_elf32_bfd_link_hash_table_create \
7580 ppc_elf_vxworks_link_hash_table_create
7581 #undef elf_backend_add_symbol_hook
7582 #define elf_backend_add_symbol_hook \
7583 ppc_elf_vxworks_add_symbol_hook
7584 #undef elf_backend_link_output_symbol_hook
7585 #define elf_backend_link_output_symbol_hook \
7586 elf_vxworks_link_output_symbol_hook
7587 #undef elf_backend_final_write_processing
7588 #define elf_backend_final_write_processing \
7589 ppc_elf_vxworks_final_write_processing
7590 #undef elf_backend_get_sec_type_attr
7591 #define elf_backend_get_sec_type_attr \
7592 ppc_elf_vxworks_get_sec_type_attr
7593 #undef elf_backend_emit_relocs
7594 #define elf_backend_emit_relocs \
7595 elf_vxworks_emit_relocs
7596
7597 #undef elf32_bed
7598 #define elf32_bed ppc_elf_vxworks_bed
7599
7600 #include "elf32-target.h"
7601