1 /* CRIS-specific support for 32-bit ELF.
2    Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
3    2010  Free Software Foundation, Inc.
4    Contributed by Axis Communications AB.
5    Written by Hans-Peter Nilsson, based on elf32-fr30.c
6    PIC and shlib bits based primarily on elf32-m68k.c and elf32-i386.c.
7 
8    This file is part of BFD, the Binary File Descriptor library.
9 
10    This program is free software; you can redistribute it and/or modify
11    it under the terms of the GNU General Public License as published by
12    the Free Software Foundation; either version 3 of the License, or
13    (at your option) any later version.
14 
15    This program is distributed in the hope that it will be useful,
16    but WITHOUT ANY WARRANTY; without even the implied warranty of
17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18    GNU General Public License for more details.
19 
20    You should have received a copy of the GNU General Public License
21    along with this program; if not, write to the Free Software
22    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
23    MA 02110-1301, USA.  */
24 
25 #include "sysdep.h"
26 #include "bfd.h"
27 #include "libbfd.h"
28 #include "elf-bfd.h"
29 #include "elf/cris.h"
30 #include <limits.h>
31 
32 /* Forward declarations.  */
33 static reloc_howto_type * cris_reloc_type_lookup
34   PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
35 
36 static void cris_info_to_howto_rela
37   PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
38 
39 static bfd_reloc_status_type cris_elf_pcrel_reloc
40   PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
41 
42 static bfd_boolean cris_elf_grok_prstatus
43   PARAMS ((bfd *abfd, Elf_Internal_Note *note));
44 
45 static bfd_boolean cris_elf_grok_psinfo
46   PARAMS ((bfd *abfd, Elf_Internal_Note *note));
47 
48 static bfd_boolean cris_elf_relocate_section
49   PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
50 	   Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
51 
52 static bfd_reloc_status_type cris_final_link_relocate
53   PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *,
54 	   Elf_Internal_Rela *, bfd_vma));
55 
56 static bfd_boolean cris_elf_object_p PARAMS ((bfd *));
57 
58 static void cris_elf_final_write_processing PARAMS ((bfd *, bfd_boolean));
59 
60 static bfd_boolean cris_elf_set_mach_from_flags
61   PARAMS ((bfd *, unsigned long int));
62 
63 static bfd_boolean cris_elf_print_private_bfd_data PARAMS ((bfd *, PTR));
64 
65 static bfd_boolean cris_elf_merge_private_bfd_data PARAMS ((bfd *, bfd *));
66 static bfd_boolean cris_elf_copy_private_bfd_data PARAMS ((bfd *, bfd *));
67 
68 struct elf_cris_link_hash_entry;
69 static bfd_boolean elf_cris_discard_excess_dso_dynamics
70   PARAMS ((struct elf_cris_link_hash_entry *, PTR));
71 static bfd_boolean elf_cris_discard_excess_program_dynamics
72   PARAMS ((struct elf_cris_link_hash_entry *, PTR));
73 static bfd_boolean elf_cris_adjust_gotplt_to_got
74   PARAMS ((struct elf_cris_link_hash_entry *, PTR));
75 static bfd_boolean elf_cris_try_fold_plt_to_got
76   PARAMS ((struct elf_cris_link_hash_entry *, PTR));
77 static struct bfd_hash_entry *elf_cris_link_hash_newfunc
78   PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
79 static struct bfd_link_hash_table *elf_cris_link_hash_table_create
80   PARAMS ((bfd *));
81 static bfd_boolean elf_cris_adjust_dynamic_symbol
82   PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
83 static bfd_boolean cris_elf_check_relocs
84   PARAMS ((bfd *, struct bfd_link_info *, asection *,
85 	   const Elf_Internal_Rela *));
86 
87 static bfd_boolean elf_cris_size_dynamic_sections
88   PARAMS ((bfd *, struct bfd_link_info *));
89 static bfd_boolean elf_cris_finish_dynamic_symbol
90   PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
91 	   Elf_Internal_Sym *));
92 static bfd_boolean elf_cris_finish_dynamic_sections
93   PARAMS ((bfd *, struct bfd_link_info *));
94 static void elf_cris_hide_symbol
95   PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean));
96 static enum elf_reloc_type_class elf_cris_reloc_type_class
97   PARAMS ((const Elf_Internal_Rela *));
98 
99 static reloc_howto_type cris_elf_howto_table [] =
100 {
101   /* This reloc does nothing.  */
102   HOWTO (R_CRIS_NONE,		/* type */
103 	 0,			/* rightshift */
104 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
105 	 32,			/* bitsize */
106 	 FALSE,			/* pc_relative */
107 	 0,			/* bitpos */
108 	 complain_overflow_bitfield, /* complain_on_overflow */
109 	 bfd_elf_generic_reloc,	/* special_function */
110 	 "R_CRIS_NONE",		/* name */
111 	 FALSE,			/* partial_inplace */
112 	 0,			/* src_mask */
113 	 0,			/* dst_mask */
114 	 FALSE),		/* pcrel_offset */
115 
116   /* An 8 bit absolute relocation.  */
117   HOWTO (R_CRIS_8,		/* type */
118 	 0,			/* rightshift */
119 	 0,			/* size (0 = byte, 1 = short, 2 = long) */
120 	 8,			/* bitsize */
121 	 FALSE,			/* pc_relative */
122 	 0,			/* bitpos */
123 	 complain_overflow_bitfield, /* complain_on_overflow */
124 	 bfd_elf_generic_reloc,	/* special_function */
125 	 "R_CRIS_8",		/* name */
126 	 FALSE,			/* partial_inplace */
127 	 0x0000,		/* src_mask */
128 	 0x00ff,		/* dst_mask */
129 	 FALSE),		/* pcrel_offset */
130 
131   /* A 16 bit absolute relocation.  */
132   HOWTO (R_CRIS_16,		/* type */
133 	 0,			/* rightshift */
134 	 1,			/* size (0 = byte, 1 = short, 2 = long) */
135 	 16,			/* bitsize */
136 	 FALSE,			/* pc_relative */
137 	 0,			/* bitpos */
138 	 complain_overflow_bitfield, /* complain_on_overflow */
139 	 bfd_elf_generic_reloc,	/* special_function */
140 	 "R_CRIS_16",		/* name */
141 	 FALSE,			/* partial_inplace */
142 	 0x00000000,		/* src_mask */
143 	 0x0000ffff,		/* dst_mask */
144 	 FALSE),		/* pcrel_offset */
145 
146   /* A 32 bit absolute relocation.  */
147   HOWTO (R_CRIS_32,		/* type */
148 	 0,			/* rightshift */
149 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
150 	 32,			/* bitsize */
151 	 FALSE,			/* pc_relative */
152 	 0,			/* bitpos */
153 	 /* We don't want overflow complaints for 64-bit vma builds
154 	    for e.g. sym+0x40000000 (or actually sym-0xc0000000 in
155 	    32-bit ELF) where sym=0xc0001234.
156 	    Don't do this for the PIC relocs, as we don't expect to
157 	    see them with large offsets.  */
158 	 complain_overflow_dont, /* complain_on_overflow */
159 	 bfd_elf_generic_reloc,	/* special_function */
160 	 "R_CRIS_32",		/* name */
161 	 FALSE,			/* partial_inplace */
162 	 0x00000000,		/* src_mask */
163 	 0xffffffff,		/* dst_mask */
164 	 FALSE),		/* pcrel_offset */
165 
166   /* An 8 bit PC-relative relocation.  */
167   HOWTO (R_CRIS_8_PCREL,	/* type */
168 	 0,			/* rightshift */
169 	 0,			/* size (0 = byte, 1 = short, 2 = long) */
170 	 8,			/* bitsize */
171 	 TRUE,			/* pc_relative */
172 	 0,			/* bitpos */
173 	 complain_overflow_bitfield, /* complain_on_overflow */
174 	 cris_elf_pcrel_reloc,	/* special_function */
175 	 "R_CRIS_8_PCREL",	/* name */
176 	 FALSE,			/* partial_inplace */
177 	 0x0000,		/* src_mask */
178 	 0x00ff,		/* dst_mask */
179 	 TRUE),			/* pcrel_offset */
180 
181   /* A 16 bit PC-relative relocation.  */
182   HOWTO (R_CRIS_16_PCREL,	/* type */
183 	 0,			/* rightshift */
184 	 1,			/* size (0 = byte, 1 = short, 2 = long) */
185 	 16,			/* bitsize */
186 	 TRUE,			/* pc_relative */
187 	 0,			/* bitpos */
188 	 complain_overflow_bitfield, /* complain_on_overflow */
189 	 cris_elf_pcrel_reloc,	/* special_function */
190 	 "R_CRIS_16_PCREL",	/* name */
191 	 FALSE,			/* partial_inplace */
192 	 0x00000000,		/* src_mask */
193 	 0x0000ffff,		/* dst_mask */
194 	 TRUE),			/* pcrel_offset */
195 
196   /* A 32 bit PC-relative relocation.  */
197   HOWTO (R_CRIS_32_PCREL,	/* type */
198 	 0,			/* rightshift */
199 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
200 	 32,			/* bitsize */
201 	 TRUE,			/* pc_relative */
202 	 0,			/* bitpos */
203 	 complain_overflow_bitfield, /* complain_on_overflow */
204 	 cris_elf_pcrel_reloc,	/* special_function */
205 	 "R_CRIS_32_PCREL",	/* name */
206 	 FALSE,			/* partial_inplace */
207 	 0x00000000,		/* src_mask */
208 	 0xffffffff,		/* dst_mask */
209 	 TRUE),			/* pcrel_offset */
210 
211   /* GNU extension to record C++ vtable hierarchy.  */
212   HOWTO (R_CRIS_GNU_VTINHERIT,	/* type */
213 	 0,			/* rightshift */
214 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
215 	 0,			/* bitsize */
216 	 FALSE,			/* pc_relative */
217 	 0,			/* bitpos */
218 	 complain_overflow_dont, /* complain_on_overflow */
219 	 NULL,			/* special_function */
220 	 "R_CRIS_GNU_VTINHERIT", /* name */
221 	 FALSE,			/* partial_inplace */
222 	 0,			/* src_mask */
223 	 0,			/* dst_mask */
224 	 FALSE),		/* pcrel_offset */
225 
226   /* GNU extension to record C++ vtable member usage.  */
227   HOWTO (R_CRIS_GNU_VTENTRY,	/* type */
228 	 0,			/* rightshift */
229 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
230 	 0,			/* bitsize */
231 	 FALSE,			/* pc_relative */
232 	 0,			/* bitpos */
233 	 complain_overflow_dont, /* complain_on_overflow */
234 	 _bfd_elf_rel_vtable_reloc_fn,	/* special_function */
235 	 "R_CRIS_GNU_VTENTRY",	 /* name */
236 	 FALSE,			/* partial_inplace */
237 	 0,			/* src_mask */
238 	 0,			/* dst_mask */
239 	 FALSE),		/* pcrel_offset */
240 
241   /* This is used only by the dynamic linker.  The symbol should exist
242      both in the object being run and in some shared library.  The
243      dynamic linker copies the data addressed by the symbol from the
244      shared library into the object, because the object being
245      run has to have the data at some particular address.  */
246   HOWTO (R_CRIS_COPY,		/* type */
247 	 0,			/* rightshift */
248 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
249 	 32,			/* bitsize */
250 	 FALSE,			/* pc_relative */
251 	 0,			/* bitpos */
252 	 complain_overflow_bitfield, /* complain_on_overflow */
253 	 bfd_elf_generic_reloc,	/* special_function */
254 	 "R_CRIS_COPY",		/* name */
255 	 FALSE,			/* partial_inplace */
256 	 0,			/* src_mask */
257 	 0,			/* dst_mask */
258 	 FALSE),		/* pcrel_offset */
259 
260   /* Like R_CRIS_32, but used when setting global offset table entries.  */
261   HOWTO (R_CRIS_GLOB_DAT,	/* type */
262 	 0,			/* rightshift */
263 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
264 	 32,			/* bitsize */
265 	 FALSE,			/* pc_relative */
266 	 0,			/* bitpos */
267 	 complain_overflow_bitfield, /* complain_on_overflow */
268 	 bfd_elf_generic_reloc,	/* special_function */
269 	 "R_CRIS_GLOB_DAT",	/* name */
270 	 FALSE,			/* partial_inplace */
271 	 0,			/* src_mask */
272 	 0xffffffff,		/* dst_mask */
273 	 FALSE),		/* pcrel_offset */
274 
275   /* Marks a procedure linkage table entry for a symbol.  */
276   HOWTO (R_CRIS_JUMP_SLOT,	/* type */
277 	 0,			/* rightshift */
278 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
279 	 32,			/* bitsize */
280 	 FALSE,			/* pc_relative */
281 	 0,			/* bitpos */
282 	 complain_overflow_bitfield, /* complain_on_overflow */
283 	 bfd_elf_generic_reloc,	/* special_function */
284 	 "R_CRIS_JUMP_SLOT",	/* name */
285 	 FALSE,			/* partial_inplace */
286 	 0,			/* src_mask */
287 	 0,			/* dst_mask */
288 	 FALSE),		/* pcrel_offset */
289 
290   /* Used only by the dynamic linker.  When the object is run, this
291      longword is set to the load address of the object, plus the
292      addend.  */
293   HOWTO (R_CRIS_RELATIVE,	/* type */
294 	 0,			/* rightshift */
295 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
296 	 32,			/* bitsize */
297 	 FALSE,			/* pc_relative */
298 	 0,			/* bitpos */
299 	 complain_overflow_bitfield, /* complain_on_overflow */
300 	 bfd_elf_generic_reloc,	/* special_function */
301 	 "R_CRIS_RELATIVE",	/* name */
302 	 FALSE,			/* partial_inplace */
303 	 0,			/* src_mask */
304 	 0xffffffff,		/* dst_mask */
305 	 FALSE),		/* pcrel_offset */
306 
307   /* Like R_CRIS_32, but referring to the GOT table entry for the symbol.  */
308   HOWTO (R_CRIS_16_GOT,		/* type */
309 	 0,			/* rightshift */
310 	 1,			/* size (0 = byte, 1 = short, 2 = long) */
311 	 16,			/* bitsize */
312 	 FALSE,			/* pc_relative */
313 	 0,			/* bitpos */
314 	 complain_overflow_bitfield, /* complain_on_overflow */
315 	 bfd_elf_generic_reloc,	/* special_function */
316 	 "R_CRIS_16_GOT",	/* name */
317 	 FALSE,			/* partial_inplace */
318 	 0,			/* src_mask */
319 	 0xffff,		/* dst_mask */
320 	 FALSE),		/* pcrel_offset */
321 
322   HOWTO (R_CRIS_32_GOT,		/* type */
323 	 0,			/* rightshift */
324 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
325 	 32,			/* bitsize */
326 	 FALSE,			/* pc_relative */
327 	 0,			/* bitpos */
328 	 complain_overflow_bitfield, /* complain_on_overflow */
329 	 bfd_elf_generic_reloc,	/* special_function */
330 	 "R_CRIS_32_GOT",	/* name */
331 	 FALSE,			/* partial_inplace */
332 	 0,			/* src_mask */
333 	 0xffffffff,		/* dst_mask */
334 	 FALSE),		/* pcrel_offset */
335 
336   /* Like R_CRIS_32_GOT, but referring to (and requesting a) PLT part of
337      the GOT table for the symbol.  */
338   HOWTO (R_CRIS_16_GOTPLT,	/* type */
339 	 0,			/* rightshift */
340 	 1,			/* size (0 = byte, 1 = short, 2 = long) */
341 	 16,			/* bitsize */
342 	 FALSE,			/* pc_relative */
343 	 0,			/* bitpos */
344 	 complain_overflow_bitfield, /* complain_on_overflow */
345 	 bfd_elf_generic_reloc,	/* special_function */
346 	 "R_CRIS_16_GOTPLT",	/* name */
347 	 FALSE,			/* partial_inplace */
348 	 0,			/* src_mask */
349 	 0xffff,		/* dst_mask */
350 	 FALSE),		/* pcrel_offset */
351 
352   HOWTO (R_CRIS_32_GOTPLT,	/* type */
353 	 0,			/* rightshift */
354 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
355 	 32,			/* bitsize */
356 	 FALSE,			/* pc_relative */
357 	 0,			/* bitpos */
358 	 complain_overflow_bitfield, /* complain_on_overflow */
359 	 bfd_elf_generic_reloc,	/* special_function */
360 	 "R_CRIS_32_GOTPLT",	/* name */
361 	 FALSE,			/* partial_inplace */
362 	 0,			/* src_mask */
363 	 0xffffffff,		/* dst_mask */
364 	 FALSE),		/* pcrel_offset */
365 
366   /* A 32-bit offset from GOT to (local const) symbol: no GOT entry should
367      be necessary.  */
368   HOWTO (R_CRIS_32_GOTREL,	/* type */
369 	 0,			/* rightshift */
370 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
371 	 32,			/* bitsize */
372 	 FALSE,			/* pc_relative */
373 	 0,			/* bitpos */
374 	 complain_overflow_bitfield, /* complain_on_overflow */
375 	 bfd_elf_generic_reloc,	/* special_function */
376 	 "R_CRIS_32_GOTREL",	/* name */
377 	 FALSE,			/* partial_inplace */
378 	 0,			/* src_mask */
379 	 0xffffffff,		/* dst_mask */
380 	 FALSE),		/* pcrel_offset */
381 
382   /* A 32-bit offset from GOT to entry for this symbol in PLT and request
383      to create PLT entry for symbol.  */
384   HOWTO (R_CRIS_32_PLT_GOTREL,	/* type */
385 	 0,			/* rightshift */
386 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
387 	 32,			/* bitsize */
388 	 FALSE,			/* pc_relative */
389 	 0,			/* bitpos */
390 	 complain_overflow_bitfield, /* complain_on_overflow */
391 	 bfd_elf_generic_reloc,	/* special_function */
392 	 "R_CRIS_32_PLT_GOTREL", /* name */
393 	 FALSE,			/* partial_inplace */
394 	 0,			/* src_mask */
395 	 0xffffffff,		/* dst_mask */
396 	 FALSE),		/* pcrel_offset */
397 
398   /* A 32-bit offset from PC (location after the relocation) + addend to
399      entry for this symbol in PLT and request to create PLT entry for
400      symbol.  */
401   HOWTO (R_CRIS_32_PLT_PCREL,	/* type */
402 	 0,			/* rightshift */
403 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
404 	 32,			/* bitsize */
405 	 TRUE,			/* pc_relative */
406 	 0,			/* bitpos */
407 	 complain_overflow_bitfield, /* complain_on_overflow */
408 	 cris_elf_pcrel_reloc,	/* special_function */
409 	 "R_CRIS_32_PLT_PCREL",	/* name */
410 	 FALSE,			/* partial_inplace */
411 	 0,			/* src_mask */
412 	 0xffffffff,		/* dst_mask */
413 	 TRUE),			/* pcrel_offset */
414 
415   /* We don't handle these in any special manner and cross-format
416      linking is not supported; just recognize them enough to pass them
417      around.  FIXME: do the same for most PIC relocs and add sanity
418      tests to actually refuse gracefully to handle these and PIC
419      relocs for cross-format linking.  */
420 #define TLSHOWTO32(name) \
421  HOWTO (name, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, \
422         bfd_elf_generic_reloc, #name, FALSE, 0, 0xffffffff, FALSE)
423 #define TLSHOWTO16X(name, X)	     \
424  HOWTO (name, 0, 1, 16, FALSE, 0, complain_overflow_ ## X, \
425         bfd_elf_generic_reloc, #name, FALSE, 0, 0xffff, FALSE)
426 #define TLSHOWTO16(name) TLSHOWTO16X(name, unsigned)
427 #define TLSHOWTO16S(name) TLSHOWTO16X(name, signed)
428 
429   TLSHOWTO32 (R_CRIS_32_GOT_GD),
430   TLSHOWTO16 (R_CRIS_16_GOT_GD),
431   TLSHOWTO32 (R_CRIS_32_GD),
432   TLSHOWTO32 (R_CRIS_DTP),
433   TLSHOWTO32 (R_CRIS_32_DTPREL),
434   TLSHOWTO16S (R_CRIS_16_DTPREL),
435   TLSHOWTO32 (R_CRIS_32_GOT_TPREL),
436   TLSHOWTO16S (R_CRIS_16_GOT_TPREL),
437   TLSHOWTO32 (R_CRIS_32_TPREL),
438   TLSHOWTO16S (R_CRIS_16_TPREL),
439   TLSHOWTO32 (R_CRIS_DTPMOD),
440   TLSHOWTO32 (R_CRIS_32_IE)
441 };
442 
443 /* Map BFD reloc types to CRIS ELF reloc types.  */
444 
445 struct cris_reloc_map
446 {
447   bfd_reloc_code_real_type bfd_reloc_val;
448   unsigned int cris_reloc_val;
449 };
450 
451 static const struct cris_reloc_map cris_reloc_map [] =
452 {
453   { BFD_RELOC_NONE,		R_CRIS_NONE },
454   { BFD_RELOC_8,		R_CRIS_8 },
455   { BFD_RELOC_16,		R_CRIS_16 },
456   { BFD_RELOC_32,		R_CRIS_32 },
457   { BFD_RELOC_8_PCREL,		R_CRIS_8_PCREL },
458   { BFD_RELOC_16_PCREL,		R_CRIS_16_PCREL },
459   { BFD_RELOC_32_PCREL,		R_CRIS_32_PCREL },
460   { BFD_RELOC_VTABLE_INHERIT,	R_CRIS_GNU_VTINHERIT },
461   { BFD_RELOC_VTABLE_ENTRY,	R_CRIS_GNU_VTENTRY },
462   { BFD_RELOC_CRIS_COPY,	R_CRIS_COPY },
463   { BFD_RELOC_CRIS_GLOB_DAT,	R_CRIS_GLOB_DAT },
464   { BFD_RELOC_CRIS_JUMP_SLOT,	R_CRIS_JUMP_SLOT },
465   { BFD_RELOC_CRIS_RELATIVE,	R_CRIS_RELATIVE },
466   { BFD_RELOC_CRIS_16_GOT,	R_CRIS_16_GOT },
467   { BFD_RELOC_CRIS_32_GOT,	R_CRIS_32_GOT },
468   { BFD_RELOC_CRIS_16_GOTPLT,	R_CRIS_16_GOTPLT },
469   { BFD_RELOC_CRIS_32_GOTPLT,	R_CRIS_32_GOTPLT },
470   { BFD_RELOC_CRIS_32_GOTREL,	R_CRIS_32_GOTREL },
471   { BFD_RELOC_CRIS_32_PLT_GOTREL, R_CRIS_32_PLT_GOTREL },
472   { BFD_RELOC_CRIS_32_PLT_PCREL, R_CRIS_32_PLT_PCREL },
473   { BFD_RELOC_CRIS_32_GOT_GD,	R_CRIS_32_GOT_GD },
474   { BFD_RELOC_CRIS_16_GOT_GD,	R_CRIS_16_GOT_GD },
475   { BFD_RELOC_CRIS_32_GD,	R_CRIS_32_GD },
476   { BFD_RELOC_CRIS_DTP,	R_CRIS_DTP },
477   { BFD_RELOC_CRIS_32_DTPREL,	R_CRIS_32_DTPREL },
478   { BFD_RELOC_CRIS_16_DTPREL,	R_CRIS_16_DTPREL },
479   { BFD_RELOC_CRIS_32_GOT_TPREL, R_CRIS_32_GOT_TPREL },
480   { BFD_RELOC_CRIS_16_GOT_TPREL, R_CRIS_16_GOT_TPREL },
481   { BFD_RELOC_CRIS_32_TPREL,	R_CRIS_32_TPREL },
482   { BFD_RELOC_CRIS_16_TPREL,	R_CRIS_16_TPREL },
483   { BFD_RELOC_CRIS_DTPMOD,	R_CRIS_DTPMOD },
484   { BFD_RELOC_CRIS_32_IE,	R_CRIS_32_IE }
485 };
486 
487 static reloc_howto_type *
cris_reloc_type_lookup(abfd,code)488 cris_reloc_type_lookup (abfd, code)
489      bfd * abfd ATTRIBUTE_UNUSED;
490      bfd_reloc_code_real_type code;
491 {
492   unsigned int i;
493 
494   for (i = 0; i < sizeof (cris_reloc_map) / sizeof (cris_reloc_map[0]); i++)
495     if (cris_reloc_map [i].bfd_reloc_val == code)
496       return & cris_elf_howto_table [cris_reloc_map[i].cris_reloc_val];
497 
498   return NULL;
499 }
500 
501 static reloc_howto_type *
cris_reloc_name_lookup(bfd * abfd ATTRIBUTE_UNUSED,const char * r_name)502 cris_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
503 {
504   unsigned int i;
505 
506   for (i = 0;
507        i < sizeof (cris_elf_howto_table) / sizeof (cris_elf_howto_table[0]);
508        i++)
509     if (cris_elf_howto_table[i].name != NULL
510 	&& strcasecmp (cris_elf_howto_table[i].name, r_name) == 0)
511       return &cris_elf_howto_table[i];
512 
513   return NULL;
514 }
515 
516 /* Set the howto pointer for an CRIS ELF reloc.  */
517 
518 static void
cris_info_to_howto_rela(abfd,cache_ptr,dst)519 cris_info_to_howto_rela (abfd, cache_ptr, dst)
520      bfd * abfd ATTRIBUTE_UNUSED;
521      arelent * cache_ptr;
522      Elf_Internal_Rela * dst;
523 {
524   enum elf_cris_reloc_type r_type;
525 
526   r_type = ELF32_R_TYPE (dst->r_info);
527   BFD_ASSERT (r_type < (unsigned int) R_CRIS_max);
528   cache_ptr->howto = & cris_elf_howto_table [r_type];
529 }
530 
531 bfd_reloc_status_type
cris_elf_pcrel_reloc(abfd,reloc_entry,symbol,data,input_section,output_bfd,error_message)532 cris_elf_pcrel_reloc (abfd, reloc_entry, symbol, data, input_section,
533 		      output_bfd, error_message)
534      bfd *abfd ATTRIBUTE_UNUSED;
535      arelent *reloc_entry;
536      asymbol *symbol;
537      PTR data ATTRIBUTE_UNUSED;
538      asection *input_section;
539      bfd *output_bfd;
540      char **error_message ATTRIBUTE_UNUSED;
541 {
542   /* By default (using only bfd_elf_generic_reloc when linking to
543      non-ELF formats) PC-relative relocs are relative to the beginning
544      of the reloc.  CRIS PC-relative relocs are relative to the position
545      *after* the reloc because that's what pre-CRISv32 PC points to
546      after reading an insn field with that reloc.  (For CRISv32, PC is
547      actually relative to the start of the insn, but we keep the old
548      definition.)  Still, we use as much generic machinery as we can.
549 
550      Only adjust when doing a final link.  */
551   if (output_bfd == (bfd *) NULL)
552     reloc_entry->addend -= 1 << reloc_entry->howto->size;
553 
554   return
555     bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
556 			   input_section, output_bfd, error_message);
557 }
558 
559 /* Support for core dump NOTE sections.
560    The slightly unintuitive code layout is an attempt to keep at least
561    some similarities with other ports, hoping to simplify general
562    changes, while still keeping Linux/CRIS and Linux/CRISv32 code apart.  */
563 
564 static bfd_boolean
cris_elf_grok_prstatus(abfd,note)565 cris_elf_grok_prstatus (abfd, note)
566      bfd *abfd;
567      Elf_Internal_Note *note;
568 {
569   int offset;
570   size_t size;
571 
572   if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
573     switch (note->descsz)
574       {
575       default:
576 	return FALSE;
577 
578       case 202:		/* Linux/CRISv32 */
579 	/* pr_cursig */
580 	elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
581 
582 	/* pr_pid */
583 	elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 22);
584 
585 	/* pr_reg */
586 	offset = 70;
587 	size = 128;
588 
589 	break;
590       }
591   else
592     switch (note->descsz)
593       {
594       default:
595 	return FALSE;
596 
597       case 214:		/* Linux/CRIS */
598 	/* pr_cursig */
599 	elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
600 
601 	/* pr_pid */
602 	elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 22);
603 
604 	/* pr_reg */
605 	offset = 70;
606 	size = 140;
607 
608 	break;
609       }
610 
611   /* Make a ".reg/999" section.  */
612   return _bfd_elfcore_make_pseudosection (abfd, ".reg",
613 					  size, note->descpos + offset);
614 }
615 
616 static bfd_boolean
cris_elf_grok_psinfo(abfd,note)617 cris_elf_grok_psinfo (abfd, note)
618      bfd *abfd;
619      Elf_Internal_Note *note;
620 {
621   if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
622     switch (note->descsz)
623       {
624       default:
625 	return FALSE;
626 
627       case 124:		/* Linux/CRISv32 elf_prpsinfo */
628 	elf_tdata (abfd)->core_program
629 	  = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
630 	elf_tdata (abfd)->core_command
631 	  = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
632       }
633   else
634     switch (note->descsz)
635       {
636       default:
637 	return FALSE;
638 
639       case 124:		/* Linux/CRIS elf_prpsinfo */
640 	elf_tdata (abfd)->core_program
641 	  = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
642 	elf_tdata (abfd)->core_command
643 	  = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
644       }
645 
646   /* Note that for some reason, a spurious space is tacked
647      onto the end of the args in some (at least one anyway)
648      implementations, so strip it off if it exists.  */
649 
650   {
651     char *command = elf_tdata (abfd)->core_command;
652     int n = strlen (command);
653 
654     if (0 < n && command[n - 1] == ' ')
655       command[n - 1] = '\0';
656   }
657 
658   return TRUE;
659 }
660 
661 /* The name of the dynamic interpreter.  This is put in the .interp
662    section.  */
663 
664 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
665 
666 /* The size in bytes of an entry in the procedure linkage table.  */
667 
668 #define PLT_ENTRY_SIZE 20
669 #define PLT_ENTRY_SIZE_V32 26
670 
671 /* The first entry in an absolute procedure linkage table looks like this.  */
672 
673 static const bfd_byte elf_cris_plt0_entry[PLT_ENTRY_SIZE] =
674 {
675   0xfc, 0xe1,
676   0x7e, 0x7e,	/* push mof.  */
677   0x7f, 0x0d,   /*  (dip [pc+]) */
678   0, 0, 0, 0,	/*  Replaced with address of .got + 4.  */
679   0x30, 0x7a,	/* move [...],mof */
680   0x7f, 0x0d,   /*  (dip [pc+]) */
681   0, 0, 0, 0,	/*  Replaced with address of .got + 8.  */
682   0x30, 0x09	/* jump [...] */
683 };
684 
685 static const bfd_byte elf_cris_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
686 {
687   0x84, 0xe2,	/* subq 4,$sp */
688   0x6f, 0xfe,	/* move.d 0,$acr */
689   0, 0, 0, 0,	/*  Replaced by address of .got + 4.  */
690   0x7e, 0x7a,	/* move $mof,[$sp] */
691   0x3f, 0x7a,	/* move [$acr],$mof */
692   0x04, 0xf2,	/* addq 4,acr */
693   0x6f, 0xfa,	/* move.d [$acr],$acr */
694   0xbf, 0x09,	/* jump $acr */
695   0xb0, 0x05,	/* nop */
696   0, 0		/*  Pad out to 26 bytes.  */
697 };
698 
699 /* Subsequent entries in an absolute procedure linkage table look like
700    this.  */
701 
702 static const bfd_byte elf_cris_plt_entry[PLT_ENTRY_SIZE] =
703 {
704   0x7f, 0x0d,   /*  (dip [pc+]) */
705   0, 0, 0, 0,	/*  Replaced with address of this symbol in .got.  */
706   0x30, 0x09,	/* jump [...] */
707   0x3f,	 0x7e,	/* move [pc+],mof */
708   0, 0, 0, 0,	/*  Replaced with offset into relocation table.  */
709   0x2f, 0xfe,	/* add.d [pc+],pc */
710   0xec, 0xff,
711   0xff, 0xff	/*  Replaced with offset to start of .plt.  */
712 };
713 
714 static const bfd_byte elf_cris_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
715 {
716   0x6f, 0xfe,	/* move.d 0,$acr */
717   0, 0, 0, 0,	/*  Replaced with address of this symbol in .got.  */
718   0x6f, 0xfa,   /* move.d [$acr],$acr */
719   0xbf, 0x09,   /* jump $acr */
720   0xb0, 0x05,	/* nop */
721   0x3f, 0x7e,	/* move 0,mof */
722   0, 0, 0, 0,	/*  Replaced with offset into relocation table. */
723   0xbf, 0x0e,	/* ba start_of_plt0_entry */
724   0, 0, 0, 0,	/*  Replaced with offset to plt0 entry.  */
725   0xb0, 0x05	/* nop */
726 };
727 
728 /* The first entry in a PIC procedure linkage table looks like this.  */
729 
730 static const bfd_byte elf_cris_pic_plt0_entry[PLT_ENTRY_SIZE] =
731 {
732   0xfc, 0xe1, 0x7e, 0x7e,	/* push mof */
733   0x04, 0x01, 0x30, 0x7a,	/* move [r0+4],mof */
734   0x08, 0x01, 0x30, 0x09,	/* jump [r0+8] */
735   0, 0, 0, 0, 0, 0, 0, 0,	/*  Pad out to 20 bytes.  */
736 };
737 
738 static const bfd_byte elf_cris_pic_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
739 {
740   0x84, 0xe2,	/* subq 4,$sp */
741   0x04, 0x01,	/* addoq 4,$r0,$acr */
742   0x7e, 0x7a,	/* move $mof,[$sp] */
743   0x3f, 0x7a,	/* move [$acr],$mof */
744   0x04, 0xf2,	/* addq 4,$acr */
745   0x6f, 0xfa,	/* move.d [$acr],$acr */
746   0xbf, 0x09,	/* jump $acr */
747   0xb0, 0x05,	/* nop */
748   0, 0,		/*  Pad out to 26 bytes.  */
749   0, 0, 0, 0,
750   0, 0, 0, 0
751 };
752 
753 /* Subsequent entries in a PIC procedure linkage table look like this.  */
754 
755 static const bfd_byte elf_cris_pic_plt_entry[PLT_ENTRY_SIZE] =
756 {
757   0x6f, 0x0d,   /*  (bdap [pc+].d,r0) */
758   0, 0, 0, 0,	/*  Replaced with offset of this symbol in .got.  */
759   0x30, 0x09,	/* jump [...] */
760   0x3f, 0x7e,	/* move [pc+],mof */
761   0, 0, 0, 0,	/*  Replaced with offset into relocation table.  */
762   0x2f, 0xfe,	/* add.d [pc+],pc */
763   0xec, 0xff,	/*  Replaced with offset to start of .plt.  */
764   0xff, 0xff
765 };
766 
767 static const bfd_byte elf_cris_pic_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
768 {
769   0x6f, 0x0d,	/* addo.d 0,$r0,$acr */
770   0, 0, 0, 0,	/*  Replaced with offset of this symbol in .got.  */
771   0x6f, 0xfa,	/* move.d [$acr],$acr */
772   0xbf, 0x09,	/* jump $acr */
773   0xb0, 0x05,	/* nop */
774   0x3f, 0x7e,	/* move relocoffs,$mof */
775   0, 0, 0, 0,	/*  Replaced with offset into relocation table.  */
776   0xbf, 0x0e,	/* ba start_of_plt */
777   0, 0, 0, 0,	/*  Replaced with offset to start of .plt.  */
778   0xb0, 0x05	/* nop */
779 };
780 
781 /* We copy elf32-m68k.c and elf32-i386.c for the basic linker hash bits
782    (and most other PIC/shlib stuff).  Check that we don't drift away
783    without reason.
784 
785    The CRIS linker, like the m68k and i386 linkers (and probably the rest
786    too) needs to keep track of the number of relocs that it decides to
787    copy in check_relocs for each symbol.  This is so that it can discard
788    PC relative relocs if it doesn't need them when linking with
789    -Bsymbolic.  We store the information in a field extending the regular
790    ELF linker hash table.  */
791 
792 /* This structure keeps track of the number of PC relative relocs we have
793    copied for a given symbol.  */
794 
795 struct elf_cris_pcrel_relocs_copied
796 {
797   /* Next section.  */
798   struct elf_cris_pcrel_relocs_copied *next;
799 
800   /* A section in dynobj.  */
801   asection *section;
802 
803   /* Number of relocs copied in this section.  */
804   bfd_size_type count;
805 
806   /* Example of reloc being copied, for message.  */
807   enum elf_cris_reloc_type r_type;
808 };
809 
810 /* CRIS ELF linker hash entry.  */
811 
812 struct elf_cris_link_hash_entry
813 {
814   struct elf_link_hash_entry root;
815 
816   /* Number of PC relative relocs copied for this symbol.  */
817   struct elf_cris_pcrel_relocs_copied *pcrel_relocs_copied;
818 
819   /* The GOTPLT references are CRIS-specific; the goal is to avoid having
820      both a general GOT and a PLT-specific GOT entry for the same symbol,
821      when it is referenced both as a function and as a function pointer.
822 
823      Number of GOTPLT references for a function.  */
824   bfd_signed_vma gotplt_refcount;
825 
826   /* Actual GOTPLT index for this symbol, if applicable, or zero if not
827      (zero is never used as an index).  FIXME: We should be able to fold
828      this with gotplt_refcount in a union, like the got and plt unions in
829      elf_link_hash_entry.  */
830   bfd_size_type gotplt_offset;
831 
832   /* The root.got.refcount is the sum of the regular reference counts
833      (this) and those members below.  We have to keep a separate count
834      to track when we've found the first (or last) reference to a
835      regular got entry.  The offset is in root.got.offset.  */
836   bfd_signed_vma reg_got_refcount;
837 
838   /* Similar to the above, the number of reloc references to this
839      symbols that need a R_CRIS_32_TPREL slot.  The offset is in
840      root.got.offset, because this and .dtp_refcount can't validly
841      happen when there's also a regular GOT entry; that's invalid
842      input for which an error is emitted.  */
843   bfd_signed_vma tprel_refcount;
844 
845   /* Similar to the above, the number of reloc references to this
846      symbols that need a R_CRIS_DTP slot.  The offset is in
847      root.got.offset; plus 4 if .tprel_refcount > 0.  */
848   bfd_signed_vma dtp_refcount;
849 };
850 
851 /* The local_got_refcounts and local_got_offsets are a multiple of
852    LSNUM in size, namely LGOT_ALLOC_NELTS_FOR(LSNUM) (plus one for the
853    refcount for GOT itself, see code), with the summary / group offset
854    for local symbols located at offset N, reference counts for
855    ordinary (address) relocs at offset N + LSNUM, for R_CRIS_DTP
856    relocs at offset N + 2*LSNUM, and for R_CRIS_32_TPREL relocs at N +
857    3*LSNUM.  */
858 
859 #define LGOT_REG_NDX(x) ((x) + symtab_hdr->sh_info)
860 #define LGOT_DTP_NDX(x) ((x) + 2 * symtab_hdr->sh_info)
861 #define LGOT_TPREL_NDX(x) ((x) + 3 * symtab_hdr->sh_info)
862 #define LGOT_ALLOC_NELTS_FOR(x) ((x) * 4)
863 
864 /* CRIS ELF linker hash table.  */
865 
866 struct elf_cris_link_hash_table
867 {
868   struct elf_link_hash_table root;
869 
870   /* We can't use the PLT offset and calculate to get the GOTPLT offset,
871      since we try and avoid creating GOTPLT:s when there's already a GOT.
872      Instead, we keep and update the next available index here.  */
873   bfd_size_type next_gotplt_entry;
874 
875   /* The number of R_CRIS_32_DTPREL and R_CRIS_16_DTPREL that have
876      been seen for any input; if != 0, then the constant-offset
877      R_CRIS_DTPMOD is needed for this DSO/executable.  This turns
878      negative at relocation, so that we don't need an extra flag for
879      when the reloc is output.  */
880   bfd_signed_vma dtpmod_refcount;
881 };
882 
883 /* Traverse a CRIS ELF linker hash table.  */
884 
885 #define elf_cris_link_hash_traverse(table, func, info)			\
886   (elf_link_hash_traverse						\
887    (&(table)->root,							\
888     (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func),	\
889     (info)))
890 
891 /* Get the CRIS ELF linker hash table from a link_info structure.  */
892 
893 #define elf_cris_hash_table(p) \
894   (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
895   == CRIS_ELF_DATA ? ((struct elf_cris_link_hash_table *) ((p)->hash)) : NULL)
896 
897 /* Get the CRIS ELF linker hash entry from a regular hash entry (the
898    "parent class").  The .root reference is just a simple type
899    check on the argument.  */
900 
901 #define elf_cris_hash_entry(p) \
902  ((struct elf_cris_link_hash_entry *) (&(p)->root))
903 
904 /* Create an entry in a CRIS ELF linker hash table.  */
905 
906 static struct bfd_hash_entry *
elf_cris_link_hash_newfunc(struct bfd_hash_entry * entry,struct bfd_hash_table * table,const char * string)907 elf_cris_link_hash_newfunc (struct bfd_hash_entry *entry,
908 			    struct bfd_hash_table *table,
909 			    const char *string)
910 {
911   struct elf_cris_link_hash_entry *ret =
912     (struct elf_cris_link_hash_entry *) entry;
913 
914   /* Allocate the structure if it has not already been allocated by a
915      subclass.  */
916   if (ret == (struct elf_cris_link_hash_entry *) NULL)
917     ret = ((struct elf_cris_link_hash_entry *)
918 	   bfd_hash_allocate (table,
919 			      sizeof (struct elf_cris_link_hash_entry)));
920   if (ret == (struct elf_cris_link_hash_entry *) NULL)
921     return (struct bfd_hash_entry *) ret;
922 
923   /* Call the allocation method of the superclass.  */
924   ret = ((struct elf_cris_link_hash_entry *)
925 	 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
926 				     table, string));
927   if (ret != (struct elf_cris_link_hash_entry *) NULL)
928     {
929       ret->pcrel_relocs_copied = NULL;
930       ret->gotplt_refcount = 0;
931       ret->gotplt_offset = 0;
932       ret->dtp_refcount = 0;
933       ret->tprel_refcount = 0;
934       ret->reg_got_refcount = 0;
935     }
936 
937   return (struct bfd_hash_entry *) ret;
938 }
939 
940 /* Create a CRIS ELF linker hash table.  */
941 
942 static struct bfd_link_hash_table *
elf_cris_link_hash_table_create(bfd * abfd)943 elf_cris_link_hash_table_create (bfd *abfd)
944 {
945   struct elf_cris_link_hash_table *ret;
946   bfd_size_type amt = sizeof (struct elf_cris_link_hash_table);
947 
948   ret = ((struct elf_cris_link_hash_table *) bfd_malloc (amt));
949   if (ret == (struct elf_cris_link_hash_table *) NULL)
950     return NULL;
951 
952   if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
953 				      elf_cris_link_hash_newfunc,
954 				      sizeof (struct elf_cris_link_hash_entry),
955 				      CRIS_ELF_DATA))
956     {
957       free (ret);
958       return NULL;
959     }
960 
961   /* Initialize to skip over the first three entries in the gotplt; they
962      are used for run-time symbol evaluation.  */
963   ret->next_gotplt_entry = 12;
964 
965   /* We haven't seen any R_CRIS_nn_GOT_TPREL initially.  */
966   ret->dtpmod_refcount = 0;
967 
968   return &ret->root.root;
969 }
970 
971 /* Perform a single relocation.  By default we use the standard BFD
972    routines, with a few tweaks.  */
973 
974 static bfd_reloc_status_type
cris_final_link_relocate(howto,input_bfd,input_section,contents,rel,relocation)975 cris_final_link_relocate (howto, input_bfd, input_section, contents, rel,
976 			  relocation)
977      reloc_howto_type *  howto;
978      bfd *               input_bfd;
979      asection *          input_section;
980      bfd_byte *          contents;
981      Elf_Internal_Rela * rel;
982      bfd_vma             relocation;
983 {
984   bfd_reloc_status_type r;
985   enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
986 
987   /* PC-relative relocations are relative to the position *after*
988      the reloc.  Note that for R_CRIS_8_PCREL the adjustment is
989      not a single byte, since PC must be 16-bit-aligned.  */
990   switch (r_type)
991     {
992       /* Check that the 16-bit GOT relocs are positive.  */
993     case R_CRIS_16_GOTPLT:
994     case R_CRIS_16_GOT:
995       if ((bfd_signed_vma) relocation < 0)
996 	return bfd_reloc_overflow;
997       break;
998 
999     case R_CRIS_32_PLT_PCREL:
1000     case R_CRIS_32_PCREL:
1001       relocation -= 2;
1002       /* Fall through.  */
1003     case R_CRIS_8_PCREL:
1004     case R_CRIS_16_PCREL:
1005       relocation -= 2;
1006       break;
1007 
1008     default:
1009       break;
1010     }
1011 
1012   r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1013 				contents, rel->r_offset,
1014 				relocation, rel->r_addend);
1015   return r;
1016 }
1017 
1018 
1019 /* The number of errors left before we stop outputting reloc-specific
1020    explanatory messages.  By coincidence, this works nicely together
1021    with the default number of messages you'll get from LD about
1022    "relocation truncated to fit" messages before you get an
1023    "additional relocation overflows omitted from the output".  */
1024 static int additional_relocation_error_msg_count = 10;
1025 
1026 /* Relocate an CRIS ELF section.  See elf32-fr30.c, from where this was
1027    copied, for further comments.  */
1028 
1029 static bfd_boolean
cris_elf_relocate_section(bfd * output_bfd ATTRIBUTE_UNUSED,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)1030 cris_elf_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED,
1031 			   struct bfd_link_info *info,
1032 			   bfd *input_bfd,
1033 			   asection *input_section,
1034 			   bfd_byte *contents,
1035 			   Elf_Internal_Rela *relocs,
1036 			   Elf_Internal_Sym *local_syms,
1037 			   asection **local_sections)
1038 {
1039   struct elf_cris_link_hash_table * htab;
1040   bfd *dynobj;
1041   Elf_Internal_Shdr *symtab_hdr;
1042   struct elf_link_hash_entry **sym_hashes;
1043   bfd_vma *local_got_offsets;
1044   asection *sgot;
1045   asection *splt;
1046   asection *sreloc;
1047   Elf_Internal_Rela *rel;
1048   Elf_Internal_Rela *relend;
1049   asection *srelgot;
1050 
1051   htab = elf_cris_hash_table (info);
1052   if (htab == NULL)
1053     return FALSE;
1054 
1055   dynobj = elf_hash_table (info)->dynobj;
1056   local_got_offsets = elf_local_got_offsets (input_bfd);
1057   symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1058   sym_hashes = elf_sym_hashes (input_bfd);
1059   relend     = relocs + input_section->reloc_count;
1060 
1061   sgot = NULL;
1062   splt = NULL;
1063   sreloc = NULL;
1064   srelgot = NULL;
1065 
1066   if (dynobj != NULL)
1067     {
1068       splt = bfd_get_section_by_name (dynobj, ".plt");
1069       sgot = bfd_get_section_by_name (dynobj, ".got");
1070     }
1071 
1072   for (rel = relocs; rel < relend; rel ++)
1073     {
1074       reloc_howto_type *howto;
1075       unsigned long r_symndx;
1076       Elf_Internal_Sym *sym;
1077       asection *sec;
1078       struct elf_link_hash_entry *h;
1079       bfd_vma relocation;
1080       bfd_reloc_status_type r;
1081       const char *symname = NULL;
1082       enum elf_cris_reloc_type r_type;
1083 
1084       r_type = ELF32_R_TYPE (rel->r_info);
1085 
1086       if (   r_type == R_CRIS_GNU_VTINHERIT
1087 	  || r_type == R_CRIS_GNU_VTENTRY)
1088 	continue;
1089 
1090       r_symndx = ELF32_R_SYM (rel->r_info);
1091       howto  = cris_elf_howto_table + r_type;
1092       h      = NULL;
1093       sym    = NULL;
1094       sec    = NULL;
1095 
1096       if (r_symndx < symtab_hdr->sh_info)
1097 	{
1098 	  sym = local_syms + r_symndx;
1099 	  sec = local_sections [r_symndx];
1100 	  relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1101 
1102 	  symname = (bfd_elf_string_from_elf_section
1103 		     (input_bfd, symtab_hdr->sh_link, sym->st_name));
1104 	  if (symname == NULL)
1105 	    symname = bfd_section_name (input_bfd, sec);
1106 	}
1107       else
1108 	{
1109 	  bfd_boolean warned;
1110 	  bfd_boolean unresolved_reloc;
1111 
1112 	  RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1113 				   r_symndx, symtab_hdr, sym_hashes,
1114 				   h, sec, relocation,
1115 				   unresolved_reloc, warned);
1116 
1117 	  symname = h->root.root.string;
1118 
1119 	  if (unresolved_reloc
1120 	      /* Perhaps we should detect the cases that
1121 		 sec->output_section is expected to be NULL like i386 and
1122 		 m68k, but apparently (and according to elfxx-ia64.c) all
1123 		 valid cases are where the symbol is defined in a shared
1124 		 object which we link dynamically against.  This includes
1125 		 PLT relocs for which we've created a PLT entry and other
1126 		 relocs for which we're prepared to create dynamic
1127 		 relocations.
1128 
1129 		 For now, new situations cause us to just err when
1130 		 sec->output_offset is NULL but the object with the symbol
1131 		 is *not* dynamically linked against.  Thus this will
1132 		 automatically remind us so we can see if there are other
1133 		 valid cases we need to revisit.  */
1134 	      && (sec->owner->flags & DYNAMIC) != 0)
1135 	    relocation = 0;
1136 
1137 	  else if (h->root.type == bfd_link_hash_defined
1138 		   || h->root.type == bfd_link_hash_defweak)
1139 	    {
1140 	      /* Here follow the cases where the relocation value must
1141 		 be zero (or when further handling is simplified when
1142 		 zero).  I can't claim to understand the various
1143 		 conditions and they weren't described in the files
1144 		 where I copied them from (elf32-m68k.c and
1145 		 elf32-i386.c), but let's mention examples of where
1146 		 they happen.  FIXME: Perhaps define and use a
1147 		 dynamic_symbol_p function like ia64.
1148 
1149 		 - When creating a shared library, we can have an
1150 		 ordinary relocation for a symbol defined in a shared
1151 		 library (perhaps the one we create).  We then make
1152 		 the relocation value zero, as the value seen now will
1153 		 be added into the relocation addend in this shared
1154 		 library, but must be handled only at dynamic-link
1155 		 time.  FIXME: Not sure this example covers the
1156 		 h->elf_link_hash_flags test, though it's there in
1157 		 other targets.  */
1158 	      if (info->shared
1159 		  && ((! info->symbolic && h->dynindx != -1)
1160 		      || !h->def_regular)
1161 		  && (input_section->flags & SEC_ALLOC) != 0
1162 		  && (r_type == R_CRIS_8
1163 		      || r_type == R_CRIS_16
1164 		      || r_type == R_CRIS_32
1165 		      || r_type == R_CRIS_8_PCREL
1166 		      || r_type == R_CRIS_16_PCREL
1167 		      || r_type == R_CRIS_32_PCREL))
1168 		relocation = 0;
1169 	      else if (!info->relocatable && unresolved_reloc)
1170 		{
1171 		  _bfd_error_handler
1172 		    (_("%B, section %A: unresolvable relocation %s against symbol `%s'"),
1173 		     input_bfd,
1174 		     input_section,
1175 		     cris_elf_howto_table[r_type].name,
1176 		     symname);
1177 		  bfd_set_error (bfd_error_bad_value);
1178 		  return FALSE;
1179 		}
1180 	    }
1181 	}
1182 
1183       if (sec != NULL && elf_discarded_section (sec))
1184 	RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1185 					 rel, relend, howto, contents);
1186 
1187       if (info->relocatable)
1188 	continue;
1189 
1190       switch (r_type)
1191 	{
1192 	case R_CRIS_16_GOTPLT:
1193 	case R_CRIS_32_GOTPLT:
1194 	  /* This is like the case for R_CRIS_32_GOT and R_CRIS_16_GOT,
1195 	     but we require a PLT, and the PLT handling will take care of
1196 	     filling in the PLT-specific GOT entry.  For the GOT offset,
1197 	     calculate it as we do when filling it in for the .got.plt
1198 	     section.  If we don't have a PLT, punt to GOT handling.  */
1199 	  if (h != NULL
1200 	      && ((struct elf_cris_link_hash_entry *) h)->gotplt_offset != 0)
1201 	    {
1202 	      asection *sgotplt
1203 		= bfd_get_section_by_name (dynobj, ".got.plt");
1204 	      bfd_vma got_offset;
1205 
1206 	      BFD_ASSERT (h->dynindx != -1);
1207 	      BFD_ASSERT (sgotplt != NULL);
1208 
1209 	      got_offset
1210 		= ((struct elf_cris_link_hash_entry *) h)->gotplt_offset;
1211 
1212 	      relocation = got_offset;
1213 	      break;
1214 	    }
1215 
1216 	  /* We didn't make a PLT entry for this symbol.  Maybe everything is
1217 	     folded into the GOT.  Other than folding, this happens when
1218 	     statically linking PIC code, or when using -Bsymbolic.  Check
1219 	     that we instead have a GOT entry as done for us by
1220 	     elf_cris_adjust_dynamic_symbol, and drop through into the
1221 	     ordinary GOT cases.  This must not happen for the
1222 	     executable, because any reference it does to a function
1223 	     that is satisfied by a DSO must generate a PLT.  We assume
1224 	     these call-specific relocs don't address non-functions.  */
1225 	  if (h != NULL
1226 	      && (h->got.offset == (bfd_vma) -1
1227 		  || (!info->shared
1228 		      && !(h->def_regular
1229 			   || (!h->def_dynamic
1230 			       && h->root.type == bfd_link_hash_undefweak)))))
1231 	    {
1232 	      (*_bfd_error_handler)
1233 		((h->got.offset == (bfd_vma) -1)
1234 		 ? _("%B, section %A: No PLT nor GOT for relocation %s"
1235 		     " against symbol `%s'")
1236 		 : _("%B, section %A: No PLT for relocation %s"
1237 		     " against symbol `%s'"),
1238 		 input_bfd,
1239 		 input_section,
1240 		 cris_elf_howto_table[r_type].name,
1241 		 (symname != NULL && symname[0] != '\0'
1242 		  ? symname : _("[whose name is lost]")));
1243 
1244 	      /* FIXME: Perhaps blaming input is not the right thing to
1245 		 do; this is probably an internal error.  But it is true
1246 		 that we didn't like that particular input.  */
1247 	      bfd_set_error (bfd_error_bad_value);
1248 	      return FALSE;
1249 	    }
1250 	  /* Fall through.  */
1251 
1252 	  /* The size of the actual relocation is not used here; we only
1253 	     fill in the GOT table here.  */
1254 	case R_CRIS_16_GOT:
1255 	case R_CRIS_32_GOT:
1256 	  {
1257 	    bfd_vma off;
1258 
1259 	    /* Note that despite using RELA relocations, the .got contents
1260 	       is always filled in with the link-relative relocation
1261 	       value; the addend.  */
1262 
1263 	    if (h != NULL)
1264 	      {
1265 		off = h->got.offset;
1266 		BFD_ASSERT (off != (bfd_vma) -1);
1267 
1268 		if (!elf_hash_table (info)->dynamic_sections_created
1269 		    || (! info->shared
1270 			&& (h->def_regular
1271 			    || h->type == STT_FUNC
1272 			    || h->needs_plt))
1273 		    || (info->shared
1274 			&& (info->symbolic || h->dynindx == -1)
1275 			&& h->def_regular))
1276 		  {
1277 		    /* This wasn't checked above for ! info->shared, but
1278 		       must hold there if we get here; the symbol must
1279 		       be defined in the regular program or be undefweak
1280 		       or be a function or otherwise need a PLT.  */
1281 		    BFD_ASSERT (!elf_hash_table (info)->dynamic_sections_created
1282 				|| info->shared
1283 				|| h->def_regular
1284 				|| h->type == STT_FUNC
1285 				|| h->needs_plt
1286 				|| h->root.type == bfd_link_hash_undefweak);
1287 
1288 		    /* This is actually a static link, or it is a
1289 		       -Bsymbolic link and the symbol is defined locally,
1290 		       or is undefweak, or the symbol was forced to be
1291 		       local because of a version file, or we're not
1292 		       creating a dynamic object.  We must initialize this
1293 		       entry in the global offset table.  Since the offset
1294 		       must always be a multiple of 4, we use the least
1295 		       significant bit to record whether we have
1296 		       initialized it already.
1297 
1298 		       If this GOT entry should be runtime-initialized, we
1299 		       will create a .rela.got relocation entry to
1300 		       initialize the value.  This is done in the
1301 		       finish_dynamic_symbol routine.  */
1302 		    if ((off & 1) != 0)
1303 		      off &= ~1;
1304 		    else
1305 		      {
1306 			bfd_put_32 (output_bfd, relocation,
1307 				    sgot->contents + off);
1308 			h->got.offset |= 1;
1309 		      }
1310 		  }
1311 	      }
1312 	    else
1313 	      {
1314 		BFD_ASSERT (local_got_offsets != NULL
1315 			    && local_got_offsets[r_symndx] != (bfd_vma) -1);
1316 
1317 		off = local_got_offsets[r_symndx];
1318 
1319 		/* The offset must always be a multiple of 4.  We use
1320 		   the least significant bit to record whether we have
1321 		   already generated the necessary reloc.  */
1322 		if ((off & 1) != 0)
1323 		  off &= ~1;
1324 		else
1325 		  {
1326 		    bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1327 
1328 		    if (info->shared)
1329 		      {
1330 			Elf_Internal_Rela outrel;
1331 			bfd_byte *loc;
1332 
1333 			if (srelgot == NULL)
1334 			  srelgot
1335 			    = bfd_get_section_by_name (dynobj, ".rela.got");
1336 			BFD_ASSERT (srelgot != NULL);
1337 
1338 			outrel.r_offset = (sgot->output_section->vma
1339 					   + sgot->output_offset
1340 					   + off);
1341 			outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1342 			outrel.r_addend = relocation;
1343 			loc = srelgot->contents;
1344 			loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1345 			bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1346 		      }
1347 
1348 		    local_got_offsets[r_symndx] |= 1;
1349 		  }
1350 	      }
1351 
1352 	    relocation = sgot->output_offset + off;
1353 	    if (rel->r_addend != 0)
1354 	      {
1355 		/* We can't do anything for a relocation which is against
1356 		   a symbol *plus offset*.  GOT holds relocations for
1357 		   symbols.  Make this an error; the compiler isn't
1358 		   allowed to pass us these kinds of things.  */
1359 		if (h == NULL)
1360 		  (*_bfd_error_handler)
1361 		    (_("%B, section %A: relocation %s with non-zero addend %d"
1362 		       " against local symbol"),
1363 		     input_bfd,
1364 		     input_section,
1365 		     cris_elf_howto_table[r_type].name,
1366 		     rel->r_addend);
1367 		else
1368 		  (*_bfd_error_handler)
1369 		    (_("%B, section %A: relocation %s with non-zero addend %d"
1370 		       " against symbol `%s'"),
1371 		     input_bfd,
1372 		     input_section,
1373 		     cris_elf_howto_table[r_type].name,
1374 		     rel->r_addend,
1375 		     symname[0] != '\0' ? symname : _("[whose name is lost]"));
1376 
1377 		bfd_set_error (bfd_error_bad_value);
1378 		return FALSE;
1379 	      }
1380 	  }
1381 	  break;
1382 
1383 	case R_CRIS_32_GOTREL:
1384 	  /* This relocation must only be performed against local symbols.
1385 	     It's also ok when we link a program and the symbol is either
1386 	     defined in an ordinary (non-DSO) object or is undefined weak.  */
1387 	  if (h != NULL
1388 	      && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1389 	      && !(!info->shared
1390 		   && (h->def_regular
1391 		       || (!h->def_dynamic
1392 			   && h->root.type == bfd_link_hash_undefweak))))
1393 	    {
1394 	      (*_bfd_error_handler)
1395 		(_("%B, section %A: relocation %s is"
1396 		   " not allowed for global symbol: `%s'"),
1397 		 input_bfd,
1398 		 input_section,
1399 		 cris_elf_howto_table[r_type].name,
1400 		 symname);
1401 	      bfd_set_error (bfd_error_bad_value);
1402 	      return FALSE;
1403 	    }
1404 
1405 	  /* This can happen if we get a link error with the input ELF
1406 	     variant mismatching the output variant.  Emit an error so
1407 	     it's noticed if it happens elsewhere.  */
1408 	  if (sgot == NULL)
1409 	    {
1410 	      (*_bfd_error_handler)
1411 		(_("%B, section %A: relocation %s with no GOT created"),
1412 		 input_bfd,
1413 		 input_section,
1414 		 cris_elf_howto_table[r_type].name);
1415 	      bfd_set_error (bfd_error_bad_value);
1416 	      return FALSE;
1417 	    }
1418 
1419 	  /* This relocation is like a PC-relative one, except the
1420 	     reference point is the location of GOT.  Note that
1421 	     sgot->output_offset is not involved in this calculation.  We
1422 	     always want the start of entire .got section, not the
1423 	     position after the reserved header.  */
1424 	  relocation -= sgot->output_section->vma;
1425 	  break;
1426 
1427 	case R_CRIS_32_PLT_PCREL:
1428 	  /* Relocation is to the entry for this symbol in the
1429 	     procedure linkage table.  */
1430 
1431 	  /* Resolve a PLT_PCREL reloc against a local symbol directly,
1432 	     without using the procedure linkage table.  */
1433 	  if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1434 	    break;
1435 
1436 	  if (h->plt.offset == (bfd_vma) -1
1437 	      || splt == NULL)
1438 	    {
1439 	      /* We didn't make a PLT entry for this symbol.  This
1440 		 happens when statically linking PIC code, or when
1441 		 using -Bsymbolic.  */
1442 	      break;
1443 	    }
1444 
1445 	  relocation = (splt->output_section->vma
1446 			+ splt->output_offset
1447 			+ h->plt.offset);
1448 	  break;
1449 
1450 	case R_CRIS_32_PLT_GOTREL:
1451 	  /* Like R_CRIS_32_PLT_PCREL, but the reference point is the
1452 	     start of the .got section.  See also comment at
1453 	     R_CRIS_32_GOT.  */
1454 	  relocation -= sgot->output_section->vma;
1455 
1456 	  /* Resolve a PLT_GOTREL reloc against a local symbol directly,
1457 	     without using the procedure linkage table.  */
1458 	  if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1459 	    break;
1460 
1461 	  if (h->plt.offset == (bfd_vma) -1
1462 	      || splt == NULL)
1463 	    {
1464 	      /* We didn't make a PLT entry for this symbol.  This
1465 		 happens when statically linking PIC code, or when
1466 		 using -Bsymbolic.  */
1467 	      break;
1468 	    }
1469 
1470 	  relocation = (splt->output_section->vma
1471 			+ splt->output_offset
1472 			+ h->plt.offset
1473 			- sgot->output_section->vma);
1474 	  break;
1475 
1476 	case R_CRIS_8_PCREL:
1477 	case R_CRIS_16_PCREL:
1478 	case R_CRIS_32_PCREL:
1479 	  /* If the symbol was local, we need no shlib-specific handling.  */
1480 	  if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1481 	      || h->dynindx == -1)
1482 	    break;
1483 
1484 	  /* Fall through.  */
1485 	case R_CRIS_8:
1486 	case R_CRIS_16:
1487 	case R_CRIS_32:
1488 	  if (info->shared
1489 	      && r_symndx != STN_UNDEF
1490 	      && (input_section->flags & SEC_ALLOC) != 0
1491 	      && ((r_type != R_CRIS_8_PCREL
1492 		   && r_type != R_CRIS_16_PCREL
1493 		   && r_type != R_CRIS_32_PCREL)
1494 		  || (!info->symbolic
1495 		      || (h != NULL && !h->def_regular))))
1496 	    {
1497 	      Elf_Internal_Rela outrel;
1498 	      bfd_byte *loc;
1499 	      bfd_boolean skip, relocate;
1500 
1501 	      /* When generating a shared object, these relocations
1502 		 are copied into the output file to be resolved at run
1503 		 time.  */
1504 
1505 	      if (sreloc == NULL)
1506 		{
1507 		  sreloc = _bfd_elf_get_dynamic_reloc_section
1508 		    (dynobj, input_section, /*rela?*/ TRUE);
1509 		  /* The section should have been created in cris_elf_check_relocs,
1510 		     but that function will not be called for objects which fail in
1511 		     cris_elf_merge_private_bfd_data.  */
1512 		  if (sreloc == NULL)
1513 		    {
1514 		      bfd_set_error (bfd_error_bad_value);
1515 		      return FALSE;
1516 		    }
1517 		}
1518 
1519 	      skip = FALSE;
1520 	      relocate = FALSE;
1521 
1522 	      outrel.r_offset =
1523 		_bfd_elf_section_offset (output_bfd, info, input_section,
1524 					 rel->r_offset);
1525 	      if (outrel.r_offset == (bfd_vma) -1)
1526 		skip = TRUE;
1527 	      else if (outrel.r_offset == (bfd_vma) -2
1528 		       /* For now, undefined weak symbols with non-default
1529 			  visibility (yielding 0), like exception info for
1530 			  discarded sections, will get a R_CRIS_NONE
1531 			  relocation rather than no relocation, because we
1532 			  notice too late that the symbol doesn't need a
1533 			  relocation.  */
1534 		       || (h != NULL
1535 			   && h->root.type == bfd_link_hash_undefweak
1536 			   && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT))
1537 		skip = TRUE, relocate = TRUE;
1538 	      outrel.r_offset += (input_section->output_section->vma
1539 				  + input_section->output_offset);
1540 
1541 	      if (skip)
1542 		memset (&outrel, 0, sizeof outrel);
1543 	      /* h->dynindx may be -1 if the symbol was marked to
1544 		 become local.  */
1545 	      else if (h != NULL
1546 		       && ((! info->symbolic && h->dynindx != -1)
1547 			   || !h->def_regular))
1548 		{
1549 		  BFD_ASSERT (h->dynindx != -1);
1550 		  outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1551 		  outrel.r_addend = relocation + rel->r_addend;
1552 		}
1553 	      else
1554 		{
1555 		  outrel.r_addend = relocation + rel->r_addend;
1556 
1557 		  if (r_type == R_CRIS_32)
1558 		    {
1559 		      relocate = TRUE;
1560 		      outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1561 		    }
1562 		  else
1563 		    {
1564 		      long indx;
1565 
1566 		      if (bfd_is_abs_section (sec))
1567 			indx = 0;
1568 		      else if (sec == NULL || sec->owner == NULL)
1569 			{
1570 			  bfd_set_error (bfd_error_bad_value);
1571 			  return FALSE;
1572 			}
1573 		      else
1574 			{
1575 			  asection *osec;
1576 
1577 			  /* We are turning this relocation into one
1578 			     against a section symbol.  It would be
1579 			     proper to subtract the symbol's value,
1580 			     osec->vma, from the emitted reloc addend,
1581 			     but ld.so expects buggy relocs.  */
1582 			  osec = sec->output_section;
1583 			  indx = elf_section_data (osec)->dynindx;
1584 			  if (indx == 0)
1585 			    {
1586 			      osec = htab->root.text_index_section;
1587 			      indx = elf_section_data (osec)->dynindx;
1588 			    }
1589 			  BFD_ASSERT (indx != 0);
1590 			}
1591 
1592 		      outrel.r_info = ELF32_R_INFO (indx, r_type);
1593 		    }
1594 		}
1595 
1596 	      loc = sreloc->contents;
1597 	      loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1598 	      bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1599 
1600 	      /* This reloc will be computed at runtime, so there's no
1601                  need to do anything now, except for R_CRIS_32 relocations
1602                  that have been turned into R_CRIS_RELATIVE.  */
1603 	      if (!relocate)
1604 		continue;
1605 	    }
1606 
1607 	  break;
1608 
1609 	case R_CRIS_16_DTPREL:
1610 	case R_CRIS_32_DTPREL:
1611 	  /* This relocation must only be performed against local
1612 	     symbols, or to sections that are not loadable.  It's also
1613 	     ok when we link a program and the symbol is defined in an
1614 	     ordinary (non-DSO) object (if it's undefined there, we've
1615 	     already seen an error).  */
1616 	  if (h != NULL
1617 	      && (input_section->flags & SEC_ALLOC) != 0
1618 	      && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1619 	      && (info->shared
1620 		  || (!h->def_regular
1621 		      && h->root.type != bfd_link_hash_undefined)))
1622 	    {
1623 	      (*_bfd_error_handler)
1624 		((h->root.type == bfd_link_hash_undefined)
1625 		 /* We shouldn't get here for GCC-emitted code.  */
1626 		 ? _("%B, section %A: relocation %s has an undefined"
1627 		     " reference to `%s', perhaps a declaration mixup?")
1628 		 : ("%B, section %A: relocation %s is"
1629 		     " not allowed for `%s', a global symbol with default"
1630 		     " visibility, perhaps a declaration mixup?"),
1631 		 input_bfd,
1632 		 input_section,
1633 		 cris_elf_howto_table[r_type].name,
1634 		 symname != NULL && symname[0] != '\0'
1635 		 ? symname : _("[whose name is lost]"));
1636 	      bfd_set_error (bfd_error_bad_value);
1637 	      return FALSE;
1638 	    }
1639 
1640 	  BFD_ASSERT ((input_section->flags & SEC_ALLOC) == 0
1641 		      || htab->dtpmod_refcount != 0);
1642 
1643 	  /* Fill in a R_CRIS_DTPMOD reloc at offset 3 if we haven't
1644 	     already done so.  Note that we do this in .got.plt, not
1645 	     in .got, as .got.plt contains the first part, still the
1646 	     reloc is against .got, because the linker script directs
1647 	     (is required to direct) them both into .got.  */
1648 	  if (htab->dtpmod_refcount > 0
1649 	      && (input_section->flags & SEC_ALLOC) != 0)
1650 	    {
1651 	      asection *sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
1652 	      BFD_ASSERT (sgotplt != NULL);
1653 
1654 	      if (info->shared)
1655 		{
1656 		  Elf_Internal_Rela outrel;
1657 		  bfd_byte *loc;
1658 
1659 		  if (srelgot == NULL)
1660 		    srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1661 		  BFD_ASSERT (srelgot != NULL);
1662 		  loc = srelgot->contents;
1663 		  loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1664 
1665 		  bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 12);
1666 		  bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16);
1667 		  outrel.r_offset = (sgotplt->output_section->vma
1668 				     + sgotplt->output_offset
1669 				     + 12);
1670 		  outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTPMOD);
1671 		  outrel.r_addend = 0;
1672 		  bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1673 		}
1674 	      else
1675 		{
1676 		  /* For an executable, the GOT entry contents is known.  */
1677 		  bfd_put_32 (output_bfd, (bfd_vma) 1, sgotplt->contents + 12);
1678 		  bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16);
1679 		}
1680 
1681 	      /* Reverse the sign to mark that we've emitted the
1682 		 required GOT entry.  */
1683 	      htab->dtpmod_refcount = - htab->dtpmod_refcount;
1684 	    }
1685 
1686 	  /* The relocation is the offset from the start of the module
1687 	     TLS block to the (local) symbol.  */
1688 	  relocation -= elf_hash_table (info)->tls_sec == NULL
1689 	    ? 0 : elf_hash_table (info)->tls_sec->vma;
1690 	  break;
1691 
1692 	case R_CRIS_32_GD:
1693 	  if (info->shared)
1694 	    {
1695 	      bfd_set_error (bfd_error_invalid_operation);
1696 
1697 	      /* We've already informed in cris_elf_check_relocs that
1698 		 this is an error.  */
1699 	      return FALSE;
1700 	    }
1701 	  /* Fall through.  */
1702 
1703 	case R_CRIS_16_GOT_GD:
1704 	case R_CRIS_32_GOT_GD:
1705 	  if (rel->r_addend != 0)
1706 	    {
1707 	      /* We can't do anything for a relocation which is against a
1708 		 symbol *plus offset*.  The GOT holds relocations for
1709 		 symbols.  Make this an error; the compiler isn't allowed
1710 		 to pass us these kinds of things.  */
1711 	      (*_bfd_error_handler)
1712 		(_("%B, section %A: relocation %s with non-zero addend %d"
1713 		   " against symbol `%s'"),
1714 		 input_bfd,
1715 		 input_section,
1716 		 cris_elf_howto_table[r_type].name,
1717 		 rel->r_addend,
1718 		 symname[0] != '\0' ? symname : _("[whose name is lost]"));
1719 
1720 	      bfd_set_error (bfd_error_bad_value);
1721 	      return FALSE;
1722 	    }
1723 
1724 	  if (!info->shared
1725 	      && (h == NULL || h->def_regular || ELF_COMMON_DEF_P (h)))
1726 	    {
1727 	      /* Known contents of the GOT.  */
1728 	      bfd_vma off;
1729 
1730 	      /* The symbol is defined in the program, so just write
1731 		 (1, known_tpoffset) into the GOT.  */
1732 	      relocation -= elf_hash_table (info)->tls_sec->vma;
1733 
1734 	      if (h != NULL)
1735 		{
1736 		  off = elf_cris_hash_entry (h)->tprel_refcount > 0
1737 		    ? h->got.offset + 4 : h->got.offset;
1738 		}
1739 	      else
1740 		{
1741 		  off = local_got_offsets[r_symndx];
1742 		  if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)])
1743 		    off += 4;
1744 		}
1745 
1746 	      /* We use bit 1 of the offset as a flag for GOT entry with
1747 		 the R_CRIS_DTP reloc, setting it when we've emitted the
1748 		 GOT entry and reloc.  Bit 0 is used for R_CRIS_32_TPREL
1749 		 relocs.  */
1750 	      if ((off & 2) == 0)
1751 		{
1752 		  off &= ~3;
1753 
1754 		  if (h != NULL)
1755 		    h->got.offset |= 2;
1756 		  else
1757 		    local_got_offsets[r_symndx] |= 2;
1758 
1759 		  bfd_put_32 (output_bfd, 1, sgot->contents + off);
1760 		  bfd_put_32 (output_bfd, relocation, sgot->contents + off + 4);
1761 		}
1762 	      else
1763 		off &= ~3;
1764 
1765 	      relocation = sgot->output_offset + off
1766 		+ (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0);
1767 	    }
1768 	  else
1769 	    {
1770 	      /* Not all parts of the GOT entry are known; emit a real
1771 		 relocation.  */
1772 	      bfd_vma off;
1773 
1774 	      if (h != NULL)
1775 		off = elf_cris_hash_entry (h)->tprel_refcount > 0
1776 		  ? h->got.offset + 4 : h->got.offset;
1777 	      else
1778 		{
1779 		  off = local_got_offsets[r_symndx];
1780 		  if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)])
1781 		    off += 4;
1782 		}
1783 
1784 	      /* See above re bit 1 and bit 0 usage.  */
1785 	      if ((off & 2) == 0)
1786 		{
1787 		  Elf_Internal_Rela outrel;
1788 		  bfd_byte *loc;
1789 
1790 		  off &= ~3;
1791 
1792 		  if (h != NULL)
1793 		    h->got.offset |= 2;
1794 		  else
1795 		    local_got_offsets[r_symndx] |= 2;
1796 
1797 		  /* Clear the target contents of the GOT (just as a
1798 		     gesture; it's already cleared on allocation): this
1799 		     relocation is not like the other dynrelocs.  */
1800 		  bfd_put_32 (output_bfd, 0, sgot->contents + off);
1801 		  bfd_put_32 (output_bfd, 0, sgot->contents + off + 4);
1802 
1803 		  if (srelgot == NULL)
1804 		    srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1805 		  BFD_ASSERT (srelgot != NULL);
1806 
1807 		  if (h != NULL && h->dynindx != -1)
1808 		    {
1809 		      outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_DTP);
1810 		      relocation = 0;
1811 		    }
1812 		  else
1813 		    {
1814 		      outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTP);
1815 
1816 		      /* NULL if we had an error.  */
1817 		      relocation -= elf_hash_table (info)->tls_sec == NULL
1818 			? 0 : elf_hash_table (info)->tls_sec->vma;
1819 		    }
1820 
1821 		  outrel.r_offset = (sgot->output_section->vma
1822 				     + sgot->output_offset
1823 				     + off);
1824 		  outrel.r_addend = relocation;
1825 		  loc = srelgot->contents;
1826 		  loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1827 
1828 		  /* NULL if we had an error.  */
1829 		  if (srelgot->contents != NULL)
1830 		    bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1831 		}
1832 	      else
1833 		off &= ~3;
1834 
1835 	      relocation = sgot->output_offset + off
1836 		+ (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0);
1837 	    }
1838 
1839 	  /* The GOT-relative offset to the GOT entry is the
1840 	     relocation, or for R_CRIS_32_GD, the actual address of
1841 	     the GOT entry.  */
1842 	  break;
1843 
1844 	case R_CRIS_32_IE:
1845 	  if (info->shared)
1846 	    {
1847 	      bfd_set_error (bfd_error_invalid_operation);
1848 
1849 	      /* We've already informed in cris_elf_check_relocs that
1850 		 this is an error.  */
1851 	      return FALSE;
1852 	    }
1853 	  /* Fall through.  */
1854 
1855 	case R_CRIS_32_GOT_TPREL:
1856 	case R_CRIS_16_GOT_TPREL:
1857 	  if (rel->r_addend != 0)
1858 	    {
1859 	      /* We can't do anything for a relocation which is
1860 		 against a symbol *plus offset*.  GOT holds
1861 		 relocations for symbols.  Make this an error; the
1862 		 compiler isn't allowed to pass us these kinds of
1863 		 things.  */
1864 	      (*_bfd_error_handler)
1865 		(_("%B, section %A: relocation %s with non-zero addend %d"
1866 		   " against symbol `%s'"),
1867 		 input_bfd,
1868 		 input_section,
1869 		 cris_elf_howto_table[r_type].name,
1870 		 rel->r_addend,
1871 		 symname[0] != '\0' ? symname : _("[whose name is lost]"));
1872 	      bfd_set_error (bfd_error_bad_value);
1873 	      return FALSE;
1874 	    }
1875 
1876 	  if (!info->shared && (h == NULL || h->def_regular))
1877 	    {
1878 	      /* Known contents of the GOT.  */
1879 	      bfd_vma off;
1880 
1881 	      /* The symbol is defined in the program, so just write
1882 		 the -prog_tls_size+known_tpoffset into the GOT.  */
1883 	      relocation -= elf_hash_table (info)->tls_sec->vma;
1884 	      relocation -= elf_hash_table (info)->tls_size;
1885 
1886 	      if (h != NULL)
1887 		off = h->got.offset;
1888 	      else
1889 		off = local_got_offsets[r_symndx];
1890 
1891 	      /* Bit 0 is used to mark whether we've emitted the required
1892 		 entry (and if needed R_CRIS_32_TPREL reloc).  Bit 1
1893 		 is used similarly for R_CRIS_DTP, see above.  */
1894 	      if ((off & 1) == 0)
1895 		{
1896 		  off &= ~3;
1897 
1898 		  if (h != NULL)
1899 		    h->got.offset |= 1;
1900 		  else
1901 		    local_got_offsets[r_symndx] |= 1;
1902 
1903 		  bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1904 		}
1905 	      else
1906 		off &= ~3;
1907 
1908 	      relocation = sgot->output_offset + off
1909 		+ (r_type == R_CRIS_32_IE ? sgot->output_section->vma : 0);
1910 	    }
1911 	  else
1912 	    {
1913 	      /* Emit a real relocation.  */
1914 	      bfd_vma off;
1915 
1916 	      if (h != NULL)
1917 		off = h->got.offset;
1918 	      else
1919 		off = local_got_offsets[r_symndx];
1920 
1921 	      /* See above re usage of bit 0 and 1.  */
1922 	      if ((off & 1) == 0)
1923 		{
1924 		  Elf_Internal_Rela outrel;
1925 		  bfd_byte *loc;
1926 
1927 		  off &= ~3;
1928 
1929 		  if (h != NULL)
1930 		    h->got.offset |= 1;
1931 		  else
1932 		    local_got_offsets[r_symndx] |= 1;
1933 
1934 		  if (srelgot == NULL)
1935 		    srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1936 		  BFD_ASSERT (srelgot != NULL);
1937 
1938 		  if (h != NULL && h->dynindx != -1)
1939 		    {
1940 		      outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_32_TPREL);
1941 		      relocation = 0;
1942 		    }
1943 		  else
1944 		    {
1945 		      outrel.r_info = ELF32_R_INFO (0, R_CRIS_32_TPREL);
1946 
1947 		      /* NULL if we had an error.  */
1948 		      relocation -= elf_hash_table (info)->tls_sec == NULL
1949 			? 0 : elf_hash_table (info)->tls_sec->vma;
1950 		    }
1951 
1952 		  /* Just "define" the initial contents in some
1953 		     semi-logical way.  */
1954 		  bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1955 
1956 		  outrel.r_offset = (sgot->output_section->vma
1957 				     + sgot->output_offset
1958 				     + off);
1959 		  outrel.r_addend = relocation;
1960 		  loc = srelgot->contents;
1961 		  loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1962 		  /* NULL if we had an error.  */
1963 		  if (srelgot->contents != NULL)
1964 		    bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1965 		}
1966 	      else
1967 		off &= ~3;
1968 
1969 	      relocation = sgot->output_offset + off
1970 		+ (r_type == R_CRIS_32_IE ? sgot->output_section->vma : 0);
1971 	    }
1972 
1973 	  /* The GOT-relative offset to the GOT entry is the relocation,
1974 	     or for R_CRIS_32_GD, the actual address of the GOT entry.  */
1975 	  break;
1976 
1977 	case R_CRIS_16_TPREL:
1978 	case R_CRIS_32_TPREL:
1979 	  /* This relocation must only be performed against symbols
1980 	     defined in an ordinary (non-DSO) object.  */
1981 	  if (info->shared)
1982 	    {
1983 	      bfd_set_error (bfd_error_invalid_operation);
1984 
1985 	      /* We've already informed in cris_elf_check_relocs that
1986 		 this is an error.  */
1987 	      return FALSE;
1988 	    }
1989 
1990 	  if (h != NULL
1991 	      && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1992 	      && !(h->def_regular || ELF_COMMON_DEF_P (h))
1993 	      /* If it's undefined, then an error message has already
1994 		 been emitted.  */
1995 	      && h->root.type != bfd_link_hash_undefined)
1996 	    {
1997 	      (*_bfd_error_handler)
1998 		(_("%B, section %A: relocation %s is"
1999 		   " not allowed for symbol: `%s'"
2000 		   " which is defined outside the program,"
2001 		   " perhaps a declaration mixup?"),
2002 		 input_bfd,
2003 		 input_section,
2004 		 cris_elf_howto_table[r_type].name,
2005 		 symname);
2006 	      bfd_set_error (bfd_error_bad_value);
2007 	      return FALSE;
2008 	    }
2009 
2010 	  /* NULL if we had an error.  */
2011 	  relocation -= elf_hash_table (info)->tls_sec == NULL
2012 	    ? 0
2013 	    : (elf_hash_table (info)->tls_sec->vma
2014 	       + elf_hash_table (info)->tls_size);
2015 
2016 	  /* The TLS-relative offset is the relocation.  */
2017 	  break;
2018 
2019 	default:
2020 	  BFD_FAIL ();
2021 	  return FALSE;
2022 	}
2023 
2024       r = cris_final_link_relocate (howto, input_bfd, input_section,
2025 				     contents, rel, relocation);
2026 
2027       if (r != bfd_reloc_ok)
2028 	{
2029 	  const char * msg = (const char *) NULL;
2030 
2031 	  switch (r)
2032 	    {
2033 	    case bfd_reloc_overflow:
2034 	      r = info->callbacks->reloc_overflow
2035 		(info, (h ? &h->root : NULL), symname, howto->name,
2036 		 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
2037 	      if (additional_relocation_error_msg_count > 0)
2038 		{
2039 		  additional_relocation_error_msg_count--;
2040 		  switch (r_type)
2041 		    {
2042 		    case R_CRIS_16_GOTPLT:
2043 		    case R_CRIS_16_GOT:
2044 
2045 		      /* Not just TLS is involved here, so we make
2046 			 generation and message depend on -fPIC/-fpic
2047 			 only.  */
2048 		    case R_CRIS_16_GOT_TPREL:
2049 		    case R_CRIS_16_GOT_GD:
2050 		      (*_bfd_error_handler)
2051 			(_("(too many global variables for -fpic:"
2052 			   " recompile with -fPIC)"));
2053 		      break;
2054 
2055 		    case R_CRIS_16_TPREL:
2056 		    case R_CRIS_16_DTPREL:
2057 		      (*_bfd_error_handler)
2058 			(_("(thread-local data too big for -fpic or"
2059 			   " -msmall-tls: recompile with -fPIC or"
2060 			   " -mno-small-tls)"));
2061 		      break;
2062 
2063 		      /* No known cause for overflow for other relocs.  */
2064 		    default:
2065 		      break;
2066 		    }
2067 		}
2068 	      break;
2069 
2070 	    case bfd_reloc_undefined:
2071 	      r = info->callbacks->undefined_symbol
2072 		(info, symname, input_bfd, input_section, rel->r_offset,
2073 		 TRUE);
2074 	      break;
2075 
2076 	    case bfd_reloc_outofrange:
2077 	      msg = _("internal error: out of range error");
2078 	      break;
2079 
2080 	    case bfd_reloc_notsupported:
2081 	      msg = _("internal error: unsupported relocation error");
2082 	      break;
2083 
2084 	    case bfd_reloc_dangerous:
2085 	      msg = _("internal error: dangerous relocation");
2086 	      break;
2087 
2088 	    default:
2089 	      msg = _("internal error: unknown error");
2090 	      break;
2091 	    }
2092 
2093 	  if (msg)
2094 	    r = info->callbacks->warning
2095 	      (info, msg, symname, input_bfd, input_section, rel->r_offset);
2096 
2097 	  if (! r)
2098 	    return FALSE;
2099 	}
2100     }
2101 
2102   return TRUE;
2103 }
2104 
2105 /* Finish up dynamic symbol handling.  We set the contents of various
2106    dynamic sections here.  */
2107 
2108 static bfd_boolean
elf_cris_finish_dynamic_symbol(bfd * output_bfd,struct bfd_link_info * info,struct elf_link_hash_entry * h,Elf_Internal_Sym * sym)2109 elf_cris_finish_dynamic_symbol (bfd *output_bfd,
2110 				struct bfd_link_info *info,
2111 				struct elf_link_hash_entry *h,
2112 				Elf_Internal_Sym *sym)
2113 {
2114   struct elf_cris_link_hash_table * htab;
2115   bfd *dynobj;
2116 
2117   /* Where in the plt entry to put values.  */
2118   int plt_off1 = 2, plt_off2 = 10, plt_off3 = 16;
2119 
2120   /* What offset to add to the distance to the first PLT entry for the
2121      value at plt_off3.   */
2122   int plt_off3_value_bias = 4;
2123 
2124   /* Where in the PLT entry the call-dynlink-stub is (happens to be same
2125      for PIC and non-PIC for v32 and pre-v32).  */
2126   int plt_stub_offset = 8;
2127   int plt_entry_size = PLT_ENTRY_SIZE;
2128   const bfd_byte *plt_entry = elf_cris_plt_entry;
2129   const bfd_byte *plt_pic_entry = elf_cris_pic_plt_entry;
2130 
2131   htab = elf_cris_hash_table (info);
2132   if (htab == NULL)
2133     return FALSE;
2134 
2135   /* Adjust the various PLT entry offsets.  */
2136   if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
2137     {
2138       plt_off2 = 14;
2139       plt_off3 = 20;
2140       plt_off3_value_bias = -2;
2141       plt_stub_offset = 12;
2142       plt_entry_size = PLT_ENTRY_SIZE_V32;
2143       plt_entry = elf_cris_plt_entry_v32;
2144       plt_pic_entry = elf_cris_pic_plt_entry_v32;
2145     }
2146 
2147   dynobj = elf_hash_table (info)->dynobj;
2148 
2149   if (h->plt.offset != (bfd_vma) -1)
2150     {
2151       asection *splt;
2152       asection *sgotplt;
2153       asection *srela;
2154       bfd_vma got_base;
2155 
2156       bfd_vma gotplt_offset
2157 	= elf_cris_hash_entry (h)->gotplt_offset;
2158       Elf_Internal_Rela rela;
2159       bfd_byte *loc;
2160       bfd_boolean has_gotplt = gotplt_offset != 0;
2161 
2162       /* Get the index in the .rela.plt relocations for the .got.plt
2163 	 entry that corresponds to this symbol.
2164 	 We have to count backwards here, and the result is only valid
2165 	 as an index into .rela.plt.  We also have to undo the effect
2166 	 of the R_CRIS_DTPMOD entry at .got index 3 (offset 12 into
2167 	 .got.plt) for which gotplt_offset is adjusted, because while
2168 	 that entry goes into .got.plt, its relocation goes into
2169 	 .rela.got, not .rela.plt.  (It's not PLT-specific; not to be
2170 	 processed as part of the runtime lazy .rela.plt relocation).
2171 	 FIXME: There be literal constants here...  */
2172       bfd_vma rela_plt_index
2173 	= (htab->dtpmod_refcount != 0
2174 	   ? gotplt_offset/4 - 2 - 3 : gotplt_offset/4 - 3);
2175 
2176       /* Get the offset into the .got table of the entry that corresponds
2177 	 to this function.  Note that we embed knowledge that "incoming"
2178 	 .got goes after .got.plt in the output without padding (pointer
2179 	 aligned).  However, that knowledge is present in several other
2180 	 places too.  */
2181       bfd_vma got_offset
2182 	= (has_gotplt
2183 	   ? gotplt_offset
2184 	   : h->got.offset + htab->next_gotplt_entry);
2185 
2186       /* This symbol has an entry in the procedure linkage table.  Set it
2187 	 up.  */
2188 
2189       BFD_ASSERT (h->dynindx != -1);
2190 
2191       splt = bfd_get_section_by_name (dynobj, ".plt");
2192       sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
2193       srela = bfd_get_section_by_name (dynobj, ".rela.plt");
2194       BFD_ASSERT (splt != NULL && sgotplt != NULL
2195 		  && (! has_gotplt || srela != NULL));
2196 
2197       got_base = sgotplt->output_section->vma + sgotplt->output_offset;
2198 
2199       /* Fill in the entry in the procedure linkage table.  */
2200       if (! info->shared)
2201 	{
2202 	  memcpy (splt->contents + h->plt.offset, plt_entry,
2203 		  plt_entry_size);
2204 
2205 	  /* We need to enter the absolute address of the GOT entry here.  */
2206 	  bfd_put_32 (output_bfd, got_base + got_offset,
2207 		      splt->contents + h->plt.offset + plt_off1);
2208 	}
2209       else
2210 	{
2211 	  memcpy (splt->contents + h->plt.offset, plt_pic_entry,
2212 		  plt_entry_size);
2213 	  bfd_put_32 (output_bfd, got_offset,
2214 		      splt->contents + h->plt.offset + plt_off1);
2215 	}
2216 
2217       /* Fill in the plt entry and make a relocation, if this is a "real"
2218 	 PLT entry.  */
2219       if (has_gotplt)
2220 	{
2221 	  /* Fill in the offset to the reloc table.  */
2222 	  bfd_put_32 (output_bfd,
2223 		      rela_plt_index * sizeof (Elf32_External_Rela),
2224 		      splt->contents + h->plt.offset + plt_off2);
2225 
2226 	  /* Fill in the offset to the first PLT entry, where to "jump".  */
2227 	  bfd_put_32 (output_bfd,
2228 		      - (h->plt.offset + plt_off3 + plt_off3_value_bias),
2229 		      splt->contents + h->plt.offset + plt_off3);
2230 
2231 	  /* Fill in the entry in the global offset table with the address of
2232 	     the relocating stub.  */
2233 	  bfd_put_32 (output_bfd,
2234 		      (splt->output_section->vma
2235 		       + splt->output_offset
2236 		       + h->plt.offset
2237 		       + plt_stub_offset),
2238 		      sgotplt->contents + got_offset);
2239 
2240 	  /* Fill in the entry in the .rela.plt section.  */
2241 	  rela.r_offset = (sgotplt->output_section->vma
2242 			   + sgotplt->output_offset
2243 			   + got_offset);
2244 	  rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_JUMP_SLOT);
2245 	  rela.r_addend = 0;
2246 	  loc = srela->contents + rela_plt_index * sizeof (Elf32_External_Rela);
2247 	  bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2248 	}
2249 
2250       if (!h->def_regular)
2251 	{
2252 	  /* Mark the symbol as undefined, rather than as defined in
2253 	     the .plt section.  Leave the value alone.  */
2254 	  sym->st_shndx = SHN_UNDEF;
2255 
2256 	  /* FIXME: From elf32-sparc.c 2001-02-19 (1.18).  I still don't
2257 	     know whether resetting the value is significant; if it really
2258 	     is, rather than a quirk or bug in the sparc port, then I
2259 	     believe we'd see this elsewhere.  */
2260 	  /* If the symbol is weak, we do need to clear the value.
2261 	     Otherwise, the PLT entry would provide a definition for
2262 	     the symbol even if the symbol wasn't defined anywhere,
2263 	     and so the symbol would never be NULL.  */
2264 	  if (!h->ref_regular_nonweak)
2265 	    sym->st_value = 0;
2266 	}
2267     }
2268 
2269   /* For an ordinary program, we emit .got relocs only for symbols that
2270      are in the dynamic-symbols table and are either defined by the
2271      program or are undefined weak symbols, or are function symbols
2272      where we do not output a PLT: the PLT reloc was output above and all
2273      references to the function symbol are redirected to the PLT.  */
2274   if (h->got.offset != (bfd_vma) -1
2275       && (elf_cris_hash_entry (h)->reg_got_refcount > 0)
2276       && (info->shared
2277 	  || (h->dynindx != -1
2278 	      && h->plt.offset == (bfd_vma) -1
2279 	      && !h->def_regular
2280 	      && h->root.type != bfd_link_hash_undefweak)))
2281     {
2282       asection *sgot;
2283       asection *srela;
2284       Elf_Internal_Rela rela;
2285       bfd_byte *loc;
2286       bfd_byte *where;
2287 
2288       /* This symbol has an entry in the global offset table.  Set it up.  */
2289 
2290       sgot = bfd_get_section_by_name (dynobj, ".got");
2291       srela = bfd_get_section_by_name (dynobj, ".rela.got");
2292       BFD_ASSERT (sgot != NULL && srela != NULL);
2293 
2294       rela.r_offset = (sgot->output_section->vma
2295 		       + sgot->output_offset
2296 		       + (h->got.offset &~ (bfd_vma) 1));
2297 
2298       /* If this is a static link, or it is a -Bsymbolic link and the
2299 	 symbol is defined locally or was forced to be local because
2300 	 of a version file, we just want to emit a RELATIVE reloc.
2301 	 The entry in the global offset table will already have been
2302 	 initialized in the relocate_section function.  */
2303       where = sgot->contents + (h->got.offset &~ (bfd_vma) 1);
2304       if (! elf_hash_table (info)->dynamic_sections_created
2305 	  || (info->shared
2306 	      && (info->symbolic || h->dynindx == -1)
2307 	      && h->def_regular))
2308 	{
2309 	  rela.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
2310 	  rela.r_addend = bfd_get_signed_32 (output_bfd, where);
2311 	}
2312       else
2313 	{
2314 	  bfd_put_32 (output_bfd, (bfd_vma) 0, where);
2315 	  rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_GLOB_DAT);
2316 	  rela.r_addend = 0;
2317 	}
2318 
2319       loc = srela->contents;
2320       loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
2321       bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2322     }
2323 
2324   if (h->needs_copy)
2325     {
2326       asection *s;
2327       Elf_Internal_Rela rela;
2328       bfd_byte *loc;
2329 
2330       /* This symbol needs a copy reloc.  Set it up.  */
2331 
2332       BFD_ASSERT (h->dynindx != -1
2333 		  && (h->root.type == bfd_link_hash_defined
2334 		      || h->root.type == bfd_link_hash_defweak));
2335 
2336       s = bfd_get_section_by_name (h->root.u.def.section->owner,
2337 				   ".rela.bss");
2338       BFD_ASSERT (s != NULL);
2339 
2340       rela.r_offset = (h->root.u.def.value
2341 		       + h->root.u.def.section->output_section->vma
2342 		       + h->root.u.def.section->output_offset);
2343       rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_COPY);
2344       rela.r_addend = 0;
2345       loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
2346       bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2347     }
2348 
2349   /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute.  */
2350   if (strcmp (h->root.root.string, "_DYNAMIC") == 0
2351       || h == elf_hash_table (info)->hgot)
2352     sym->st_shndx = SHN_ABS;
2353 
2354   return TRUE;
2355 }
2356 
2357 /* Finish up the dynamic sections.  Do *not* emit relocs here, as their
2358    offsets were changed, as part of -z combreloc handling, from those we
2359    computed.  */
2360 
2361 static bfd_boolean
elf_cris_finish_dynamic_sections(output_bfd,info)2362 elf_cris_finish_dynamic_sections (output_bfd, info)
2363      bfd *output_bfd;
2364      struct bfd_link_info *info;
2365 {
2366   bfd *dynobj;
2367   asection *sgot;
2368   asection *sdyn;
2369 
2370   dynobj = elf_hash_table (info)->dynobj;
2371 
2372   sgot = bfd_get_section_by_name (dynobj, ".got.plt");
2373   BFD_ASSERT (sgot != NULL);
2374   sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
2375 
2376   if (elf_hash_table (info)->dynamic_sections_created)
2377     {
2378       asection *splt;
2379       Elf32_External_Dyn *dyncon, *dynconend;
2380 
2381       splt = bfd_get_section_by_name (dynobj, ".plt");
2382       BFD_ASSERT (splt != NULL && sdyn != NULL);
2383 
2384       dyncon = (Elf32_External_Dyn *) sdyn->contents;
2385       dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
2386       for (; dyncon < dynconend; dyncon++)
2387 	{
2388 	  Elf_Internal_Dyn dyn;
2389 	  asection *s;
2390 
2391 	  bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
2392 
2393 	  switch (dyn.d_tag)
2394 	    {
2395 	    default:
2396 	      break;
2397 
2398 	    case DT_PLTGOT:
2399 	      s = bfd_get_section_by_name (output_bfd, ".got");
2400 	      BFD_ASSERT (s != NULL);
2401 	      dyn.d_un.d_ptr = s->vma;
2402 	      bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2403 	      break;
2404 
2405 	    case DT_JMPREL:
2406 	      /* Yes, we *can* have a .plt and no .plt.rela, for instance
2407 		 if all symbols are found in the .got (not .got.plt).  */
2408 	      s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2409 	      dyn.d_un.d_ptr = s != NULL ? s->vma : 0;
2410 	      bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2411 	      break;
2412 
2413 	    case DT_PLTRELSZ:
2414 	      s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2415 	      if (s == NULL)
2416 		dyn.d_un.d_val = 0;
2417 	      else
2418 		dyn.d_un.d_val = s->size;
2419 	      bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2420 	      break;
2421 
2422 	    case DT_RELASZ:
2423 	      /* The procedure linkage table relocs (DT_JMPREL) should
2424 		 not be included in the overall relocs (DT_RELA).
2425 		 Therefore, we override the DT_RELASZ entry here to
2426 		 make it not include the JMPREL relocs.  Since the
2427 		 linker script arranges for .rela.plt to follow all
2428 		 other relocation sections, we don't have to worry
2429 		 about changing the DT_RELA entry.  */
2430 	      s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2431 	      if (s != NULL)
2432 		dyn.d_un.d_val -= s->size;
2433 	      bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2434 	      break;
2435 	    }
2436 	}
2437 
2438       /* Fill in the first entry in the procedure linkage table.  */
2439       if (splt->size > 0)
2440 	{
2441 	  if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
2442 	    {
2443 	      if (info->shared)
2444 		memcpy (splt->contents, elf_cris_pic_plt0_entry_v32,
2445 			PLT_ENTRY_SIZE_V32);
2446 	      else
2447 		{
2448 		  memcpy (splt->contents, elf_cris_plt0_entry_v32,
2449 			  PLT_ENTRY_SIZE_V32);
2450 		  bfd_put_32 (output_bfd,
2451 			      sgot->output_section->vma
2452 			      + sgot->output_offset + 4,
2453 			      splt->contents + 4);
2454 
2455 		  elf_section_data (splt->output_section)->this_hdr.sh_entsize
2456 		    = PLT_ENTRY_SIZE_V32;
2457 		}
2458 	    }
2459 	  else
2460 	    {
2461 	      if (info->shared)
2462 		memcpy (splt->contents, elf_cris_pic_plt0_entry,
2463 			PLT_ENTRY_SIZE);
2464 	      else
2465 		{
2466 		  memcpy (splt->contents, elf_cris_plt0_entry,
2467 			  PLT_ENTRY_SIZE);
2468 		  bfd_put_32 (output_bfd,
2469 			      sgot->output_section->vma
2470 			      + sgot->output_offset + 4,
2471 			      splt->contents + 6);
2472 		  bfd_put_32 (output_bfd,
2473 			      sgot->output_section->vma
2474 			      + sgot->output_offset + 8,
2475 			      splt->contents + 14);
2476 
2477 		  elf_section_data (splt->output_section)->this_hdr.sh_entsize
2478 		    = PLT_ENTRY_SIZE;
2479 		}
2480             }
2481 	}
2482     }
2483 
2484   /* Fill in the first three entries in the global offset table.  */
2485   if (sgot->size > 0)
2486     {
2487       if (sdyn == NULL)
2488 	bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
2489       else
2490 	bfd_put_32 (output_bfd,
2491 		    sdyn->output_section->vma + sdyn->output_offset,
2492 		    sgot->contents);
2493       bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
2494       bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
2495     }
2496 
2497   elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2498 
2499   return TRUE;
2500 }
2501 
2502 /* Return the section that should be marked against GC for a given
2503    relocation.  */
2504 
2505 static asection *
cris_elf_gc_mark_hook(asection * sec,struct bfd_link_info * info,Elf_Internal_Rela * rel,struct elf_link_hash_entry * h,Elf_Internal_Sym * sym)2506 cris_elf_gc_mark_hook (asection *sec,
2507 		       struct bfd_link_info *info,
2508 		       Elf_Internal_Rela *rel,
2509 		       struct elf_link_hash_entry *h,
2510 		       Elf_Internal_Sym *sym)
2511 {
2512   enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
2513   if (h != NULL)
2514     switch (r_type)
2515       {
2516       case R_CRIS_GNU_VTINHERIT:
2517       case R_CRIS_GNU_VTENTRY:
2518 	return NULL;
2519 
2520       default:
2521 	break;
2522       }
2523 
2524   return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2525 }
2526 
2527 /* Update the got entry reference counts for the section being removed.  */
2528 
2529 static bfd_boolean
cris_elf_gc_sweep_hook(bfd * abfd,struct bfd_link_info * info,asection * sec,const Elf_Internal_Rela * relocs)2530 cris_elf_gc_sweep_hook (bfd *abfd,
2531 			struct bfd_link_info *info,
2532 			asection *sec,
2533 			const Elf_Internal_Rela *relocs)
2534 {
2535   struct elf_cris_link_hash_table * htab;
2536   Elf_Internal_Shdr *symtab_hdr;
2537   struct elf_link_hash_entry **sym_hashes;
2538   bfd_signed_vma *local_got_refcounts;
2539   const Elf_Internal_Rela *rel, *relend;
2540   bfd *dynobj;
2541   asection *sgot;
2542   asection *srelgot;
2543 
2544   if (info->relocatable)
2545     return TRUE;
2546 
2547   dynobj = elf_hash_table (info)->dynobj;
2548   if (dynobj == NULL)
2549     return TRUE;
2550 
2551   htab = elf_cris_hash_table (info);
2552   if (htab == NULL)
2553     return FALSE;
2554 
2555   symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2556   sym_hashes = elf_sym_hashes (abfd);
2557   local_got_refcounts = elf_local_got_refcounts (abfd);
2558 
2559   sgot = bfd_get_section_by_name (dynobj, ".got");
2560   srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
2561 
2562   relend = relocs + sec->reloc_count;
2563   for (rel = relocs; rel < relend; rel++)
2564     {
2565       unsigned long r_symndx;
2566       struct elf_link_hash_entry *h = NULL;
2567       bfd_signed_vma got_element_size = 4;
2568       bfd_signed_vma *specific_refcount = NULL;
2569       enum elf_cris_reloc_type r_type;
2570 
2571       r_symndx = ELF32_R_SYM (rel->r_info);
2572       if (r_symndx >= symtab_hdr->sh_info)
2573 	{
2574 	  h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2575 	  while (h->root.type == bfd_link_hash_indirect
2576 		 || h->root.type == bfd_link_hash_warning)
2577 	    h = (struct elf_link_hash_entry *) h->root.u.i.link;
2578 	}
2579 
2580       r_type = ELF32_R_TYPE (rel->r_info);
2581       switch (r_type)
2582 	{
2583 	case R_CRIS_32_GOT:
2584 	case R_CRIS_16_GOT:
2585 	case R_CRIS_16_GOTPLT:
2586 	case R_CRIS_32_GOTPLT:
2587 	  specific_refcount = h != NULL
2588 	    ? &((struct elf_cris_link_hash_entry *) h)->reg_got_refcount
2589 	    : &local_got_refcounts[LGOT_REG_NDX (r_symndx)];
2590 	  break;
2591 
2592 	case R_CRIS_32_GD:
2593 	case R_CRIS_32_GOT_GD:
2594 	case R_CRIS_16_GOT_GD:
2595 	  got_element_size = 8;
2596 	  specific_refcount = h != NULL
2597 	    ? &((struct elf_cris_link_hash_entry *) h)->dtp_refcount
2598 	    : &local_got_refcounts[LGOT_DTP_NDX (r_symndx)];
2599 	  break;
2600 
2601 	case R_CRIS_32_IE:
2602 	case R_CRIS_16_GOT_TPREL:
2603 	case R_CRIS_32_GOT_TPREL:
2604 	  specific_refcount = h != NULL
2605 	    ? &((struct elf_cris_link_hash_entry *) h)->tprel_refcount
2606 	    : &local_got_refcounts[LGOT_TPREL_NDX (r_symndx)];
2607 	  break;
2608 
2609 	default:
2610 	  break;
2611 	}
2612 
2613       switch (r_type)
2614 	{
2615 	case R_CRIS_32_IE:
2616 	case R_CRIS_32_GD:
2617 	case R_CRIS_16_GOT_TPREL:
2618 	case R_CRIS_32_GOT_TPREL:
2619 	case R_CRIS_32_GOT_GD:
2620 	case R_CRIS_16_GOT_GD:
2621 	case R_CRIS_16_GOT:
2622 	case R_CRIS_32_GOT:
2623 	  if (h != NULL)
2624 	    {
2625 	      /* If the counters are 0 when we got here, we've
2626 		 miscounted somehow somewhere, an internal error.  */
2627 	      BFD_ASSERT (h->got.refcount > 0);
2628 	      --h->got.refcount;
2629 
2630 	      BFD_ASSERT (*specific_refcount > 0);
2631 	      --*specific_refcount;
2632 	      if (*specific_refcount == 0)
2633 		{
2634 		  /* We don't need the .got entry any more.  */
2635 		  sgot->size -= got_element_size;
2636 		  srelgot->size -= sizeof (Elf32_External_Rela);
2637 		}
2638 	      break;
2639 	    }
2640 
2641 	local_got_reloc:
2642 	  if (local_got_refcounts != NULL)
2643 	    {
2644 	      /* If the counters are 0 when we got here, we've
2645 		 miscounted somehow somewhere, an internal error.  */
2646 	      BFD_ASSERT (local_got_refcounts[r_symndx] > 0);
2647 	      --local_got_refcounts[r_symndx];
2648 
2649 	      BFD_ASSERT (*specific_refcount > 0);
2650 	      --*specific_refcount;
2651 	      if (*specific_refcount == 0)
2652 		{
2653 		  /* We don't need the .got entry any more.  */
2654 		  sgot->size -= got_element_size;
2655 		  if (info->shared)
2656 		    srelgot->size -= sizeof (Elf32_External_Rela);
2657 		}
2658 	    }
2659 	  break;
2660 
2661 	case R_CRIS_16_GOTPLT:
2662 	case R_CRIS_32_GOTPLT:
2663 	  /* For local symbols, treat these like GOT relocs.  */
2664 	  if (h == NULL)
2665 	    goto local_got_reloc;
2666 	  /* Fall through.  */
2667 
2668 	case R_CRIS_32_PLT_GOTREL:
2669 	  /* FIXME: We don't garbage-collect away the .got section.  */
2670 	  if (local_got_refcounts != NULL)
2671 	    local_got_refcounts[-1]--;
2672 	  /* Fall through.  */
2673 
2674 	case R_CRIS_8_PCREL:
2675 	case R_CRIS_16_PCREL:
2676 	case R_CRIS_32_PCREL:
2677 	case R_CRIS_32_PLT_PCREL:
2678 	  if (h != NULL)
2679 	    {
2680 	      if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2681 		  && h->plt.refcount > 0)
2682 		--h->plt.refcount;
2683 	    }
2684 	  break;
2685 
2686 	case R_CRIS_32_DTPREL:
2687 	  /* This'd be a .dtpreld entry in e.g. debug info.  */
2688 	  if ((sec->flags & SEC_ALLOC) == 0)
2689 	    break;
2690 	  /* Fall through.  */
2691 	case R_CRIS_16_DTPREL:
2692 	  htab->dtpmod_refcount--;
2693 	  if (htab->dtpmod_refcount == 0)
2694 	    htab->next_gotplt_entry -= 8;
2695 	  BFD_ASSERT (local_got_refcounts != NULL);
2696 	  local_got_refcounts[-1]--;
2697 	  break;
2698 
2699 	default:
2700 	  break;
2701 	}
2702     }
2703 
2704   return TRUE;
2705 }
2706 
2707 /* The elf_backend_plt_sym_val hook function.  */
2708 
2709 static bfd_vma
cris_elf_plt_sym_val(bfd_vma i,const asection * plt,const arelent * rel ATTRIBUTE_UNUSED)2710 cris_elf_plt_sym_val (bfd_vma i, const asection *plt,
2711 		      const arelent *rel ATTRIBUTE_UNUSED)
2712 {
2713   bfd_size_type plt_entry_size;
2714 
2715   plt_entry_size
2716     = (bfd_get_mach (plt->owner) == bfd_mach_cris_v32
2717        ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE);
2718 
2719   return plt->vma + (i + 1) * plt_entry_size;
2720 }
2721 
2722 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
2723    entry but we found we will not create any.  Called when we find we will
2724    not have any PLT for this symbol, by for example
2725    elf_cris_adjust_dynamic_symbol when we're doing a proper dynamic link,
2726    or elf_cris_size_dynamic_sections if no dynamic sections will be
2727    created (we're only linking static objects).  */
2728 
2729 static bfd_boolean
elf_cris_adjust_gotplt_to_got(h,p)2730 elf_cris_adjust_gotplt_to_got (h, p)
2731      struct elf_cris_link_hash_entry *h;
2732      PTR p;
2733 {
2734   struct bfd_link_info *info = (struct bfd_link_info *) p;
2735 
2736   if (h->root.root.type == bfd_link_hash_warning)
2737     h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link;
2738 
2739   /* If nobody wanted a GOTPLT with this symbol, we're done.  */
2740   if (h->gotplt_refcount <= 0)
2741     return TRUE;
2742 
2743   if (h->reg_got_refcount > 0)
2744     {
2745       /* There's a GOT entry for this symbol.  Just adjust the refcounts.
2746 	 Probably not necessary at this stage, but keeping them accurate
2747 	 helps avoiding surprises later.  */
2748       h->root.got.refcount += h->gotplt_refcount;
2749       h->reg_got_refcount += h->gotplt_refcount;
2750       h->gotplt_refcount = 0;
2751     }
2752   else
2753     {
2754       /* No GOT entry for this symbol.  We need to create one.  */
2755       bfd *dynobj = elf_hash_table (info)->dynobj;
2756       asection *sgot;
2757       asection *srelgot;
2758 
2759       BFD_ASSERT (dynobj != NULL);
2760       sgot = bfd_get_section_by_name (dynobj, ".got");
2761       srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
2762 
2763       /* Put accurate refcounts there.  */
2764       h->root.got.refcount += h->gotplt_refcount;
2765       h->reg_got_refcount = h->gotplt_refcount;
2766 
2767       h->gotplt_refcount = 0;
2768 
2769       /* We always have a .got and a .rela.got section if there were
2770 	 GOTPLT relocs in input.  */
2771       BFD_ASSERT (sgot != NULL && srelgot != NULL);
2772 
2773       /* Allocate space in the .got section.  */
2774       sgot->size += 4;
2775 
2776       /* Allocate relocation space.  */
2777       srelgot->size += sizeof (Elf32_External_Rela);
2778     }
2779 
2780   return TRUE;
2781 }
2782 
2783 /* Try to fold PLT entries with GOT entries.  There are two cases when we
2784    want to do this:
2785 
2786    - When all PLT references are GOTPLT references, and there are GOT
2787      references, and this is not the executable.  We don't have to
2788      generate a PLT at all.
2789 
2790    - When there are both (ordinary) PLT references and GOT references,
2791      and this isn't the executable.
2792      We want to make the PLT reference use the ordinary GOT entry rather
2793      than R_CRIS_JUMP_SLOT, a run-time dynamically resolved GOTPLT entry,
2794      since the GOT entry will have to be resolved at startup anyway.
2795 
2796    Though the latter case is handled when room for the PLT is allocated,
2797    not here.
2798 
2799    By folding into the GOT, we may need a round-trip to a PLT in the
2800    executable for calls, a loss in performance.  Still, losing a
2801    reloc is a win in size and at least in start-up time.
2802 
2803    Note that this function is called before symbols are forced local by
2804    version scripts.  The differing cases are handled by
2805    elf_cris_hide_symbol.  */
2806 
2807 static bfd_boolean
elf_cris_try_fold_plt_to_got(h,p)2808 elf_cris_try_fold_plt_to_got (h, p)
2809      struct elf_cris_link_hash_entry *h;
2810      PTR p;
2811 {
2812   struct bfd_link_info *info = (struct bfd_link_info *) p;
2813 
2814   /* If there are no GOT references for this symbol, we can't fold any
2815      other reference so there's nothing to do.  Likewise if there are no
2816      PLT references; GOTPLT references included.  */
2817   if (h->root.got.refcount <= 0 || h->root.plt.refcount <= 0)
2818     return TRUE;
2819 
2820   /* GOTPLT relocs are supposed to be included into the PLT refcount.  */
2821   BFD_ASSERT (h->gotplt_refcount <= h->root.plt.refcount);
2822 
2823   if (h->gotplt_refcount == h->root.plt.refcount)
2824     {
2825       /* The only PLT references are GOTPLT references, and there are GOT
2826 	 references.  Convert PLT to GOT references.  */
2827       if (! elf_cris_adjust_gotplt_to_got (h, info))
2828 	return FALSE;
2829 
2830       /* Clear the PLT references, so no PLT will be created.  */
2831       h->root.plt.offset = (bfd_vma) -1;
2832     }
2833 
2834   return TRUE;
2835 }
2836 
2837 /* Our own version of hide_symbol, so that we can adjust a GOTPLT reloc
2838    to use a GOT entry (and create one) rather than requiring a GOTPLT
2839    entry.  */
2840 
2841 static void
elf_cris_hide_symbol(info,h,force_local)2842 elf_cris_hide_symbol (info, h, force_local)
2843      struct bfd_link_info *info;
2844      struct elf_link_hash_entry *h;
2845      bfd_boolean force_local;
2846 {
2847   elf_cris_adjust_gotplt_to_got ((struct elf_cris_link_hash_entry *) h, info);
2848 
2849   _bfd_elf_link_hash_hide_symbol (info, h, force_local);
2850 }
2851 
2852 /* Adjust a symbol defined by a dynamic object and referenced by a
2853    regular object.  The current definition is in some section of the
2854    dynamic object, but we're not including those sections.  We have to
2855    change the definition to something the rest of the link can
2856    understand.  */
2857 
2858 static bfd_boolean
elf_cris_adjust_dynamic_symbol(struct bfd_link_info * info,struct elf_link_hash_entry * h)2859 elf_cris_adjust_dynamic_symbol (struct bfd_link_info *info,
2860 				struct elf_link_hash_entry *h)
2861 {
2862   struct elf_cris_link_hash_table * htab;
2863   bfd *dynobj;
2864   asection *s;
2865   bfd_size_type plt_entry_size;
2866 
2867   htab = elf_cris_hash_table (info);
2868   if (htab == NULL)
2869     return FALSE;
2870 
2871   dynobj = elf_hash_table (info)->dynobj;
2872 
2873   /* Make sure we know what is going on here.  */
2874   BFD_ASSERT (dynobj != NULL
2875 	      && (h->needs_plt
2876 		  || h->u.weakdef != NULL
2877 		  || (h->def_dynamic
2878 		      && h->ref_regular
2879 		      && !h->def_regular)));
2880 
2881   plt_entry_size
2882     = (bfd_get_mach (dynobj) == bfd_mach_cris_v32
2883        ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE);
2884 
2885   /* If this is a function, put it in the procedure linkage table.  We
2886      will fill in the contents of the procedure linkage table later,
2887      when we know the address of the .got section.  */
2888   if (h->type == STT_FUNC
2889       || h->needs_plt)
2890     {
2891       /* If we link a program (not a DSO), we'll get rid of unnecessary
2892 	 PLT entries; we point to the actual symbols -- even for pic
2893 	 relocs, because a program built with -fpic should have the same
2894 	 result as one built without -fpic, specifically considering weak
2895 	 symbols.
2896 	 FIXME: m68k and i386 differ here, for unclear reasons.  */
2897       if (! info->shared
2898 	  && !h->def_dynamic)
2899 	{
2900 	  /* This case can occur if we saw a PLT reloc in an input file,
2901 	     but the symbol was not defined by a dynamic object.  In such
2902 	     a case, we don't actually need to build a procedure linkage
2903 	     table, and we can just do an absolute or PC reloc instead, or
2904 	     change a .got.plt index to a .got index for GOTPLT relocs.  */
2905 	  BFD_ASSERT (h->needs_plt);
2906 	  h->needs_plt = 0;
2907 	  h->plt.offset = (bfd_vma) -1;
2908 	  return
2909 	    elf_cris_adjust_gotplt_to_got ((struct
2910 					    elf_cris_link_hash_entry *) h,
2911 					   info);
2912 	}
2913 
2914       /* If we had a R_CRIS_GLOB_DAT that didn't have to point to a PLT;
2915 	 where a pointer-equivalent symbol was unimportant (i.e. more
2916 	 like R_CRIS_JUMP_SLOT after symbol evaluation) we could get rid
2917 	 of the PLT.  We can't for the executable, because the GOT
2918 	 entries will point to the PLT there (and be constant).  */
2919       if (info->shared
2920 	  && !elf_cris_try_fold_plt_to_got ((struct elf_cris_link_hash_entry*)
2921 					    h, info))
2922 	return FALSE;
2923 
2924       /* GC or folding may have rendered this entry unused.  */
2925       if (h->plt.refcount <= 0)
2926 	{
2927 	  h->needs_plt = 0;
2928 	  h->plt.offset = (bfd_vma) -1;
2929 	  return TRUE;
2930 	}
2931 
2932       /* Make sure this symbol is output as a dynamic symbol.  */
2933       if (h->dynindx == -1)
2934 	{
2935 	  if (! bfd_elf_link_record_dynamic_symbol (info, h))
2936 	    return FALSE;
2937 	}
2938 
2939       s = bfd_get_section_by_name (dynobj, ".plt");
2940       BFD_ASSERT (s != NULL);
2941 
2942       /* If this is the first .plt entry, make room for the special
2943 	 first entry.  */
2944       if (s->size == 0)
2945 	s->size += plt_entry_size;
2946 
2947       /* If this symbol is not defined in a regular file, and we are
2948 	 not generating a shared library, then set the symbol to this
2949 	 location in the .plt.  */
2950       if (!info->shared
2951 	  && !h->def_regular)
2952 	{
2953 	  h->root.u.def.section = s;
2954 	  h->root.u.def.value = s->size;
2955 	}
2956 
2957       /* If there's already a GOT entry, use that, not a .got.plt.  A
2958 	 GOT field still has a reference count when we get here; it's
2959 	 not yet changed to an offset.  We can't do this for an
2960 	 executable, because then the reloc associated with the PLT
2961 	 would get a non-PLT reloc pointing to the PLT.  FIXME: Move
2962 	 this to elf_cris_try_fold_plt_to_got.  */
2963       if (info->shared && h->got.refcount > 0)
2964 	{
2965 	  h->got.refcount += h->plt.refcount;
2966 
2967 	  /* Mark the PLT offset to use the GOT entry by setting the low
2968 	     bit in the plt offset; it is always a multiple of
2969 	     plt_entry_size (which is at least a multiple of 2).  */
2970 	  BFD_ASSERT ((s->size % plt_entry_size) == 0);
2971 
2972 	  /* Change the PLT refcount to an offset.  */
2973 	  h->plt.offset = s->size;
2974 
2975 	  /* By not setting gotplt_offset (i.e. it remains at 0), we signal
2976 	     that the got entry should be used instead.  */
2977 	  BFD_ASSERT (((struct elf_cris_link_hash_entry *)
2978 		       h)->gotplt_offset == 0);
2979 
2980 	  /* Make room for this entry.  */
2981 	  s->size += plt_entry_size;
2982 
2983 	  return TRUE;
2984 	}
2985 
2986       /* No GOT reference for this symbol; prepare for an ordinary PLT.  */
2987       h->plt.offset = s->size;
2988 
2989       /* Make room for this entry.  */
2990       s->size += plt_entry_size;
2991 
2992       /* We also need to make an entry in the .got.plt section, which
2993 	 will be placed in the .got section by the linker script.  */
2994       ((struct elf_cris_link_hash_entry *) h)->gotplt_offset
2995 	= htab->next_gotplt_entry;
2996       htab->next_gotplt_entry += 4;
2997 
2998       s = bfd_get_section_by_name (dynobj, ".got.plt");
2999       BFD_ASSERT (s != NULL);
3000       s->size += 4;
3001 
3002       /* We also need to make an entry in the .rela.plt section.  */
3003 
3004       s = bfd_get_section_by_name (dynobj, ".rela.plt");
3005       BFD_ASSERT (s != NULL);
3006       s->size += sizeof (Elf32_External_Rela);
3007 
3008       return TRUE;
3009     }
3010 
3011   /* Reinitialize the plt offset now that it is not used as a reference
3012      count any more.  */
3013   h->plt.offset = (bfd_vma) -1;
3014 
3015   /* If this is a weak symbol, and there is a real definition, the
3016      processor independent code will have arranged for us to see the
3017      real definition first, and we can just use the same value.  */
3018   if (h->u.weakdef != NULL)
3019     {
3020       BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
3021 		  || h->u.weakdef->root.type == bfd_link_hash_defweak);
3022       h->root.u.def.section = h->u.weakdef->root.u.def.section;
3023       h->root.u.def.value = h->u.weakdef->root.u.def.value;
3024       return TRUE;
3025     }
3026 
3027   /* This is a reference to a symbol defined by a dynamic object which
3028      is not a function.  */
3029 
3030   /* If we are creating a shared library, we must presume that the
3031      only references to the symbol are via the global offset table.
3032      For such cases we need not do anything here; the relocations will
3033      be handled correctly by relocate_section.  */
3034   if (info->shared)
3035     return TRUE;
3036 
3037   /* If there are no references to this symbol that do not use the
3038      GOT, we don't need to generate a copy reloc.  */
3039   if (!h->non_got_ref)
3040     return TRUE;
3041 
3042   if (h->size == 0)
3043     {
3044       (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
3045 			     h->root.root.string);
3046       return TRUE;
3047     }
3048 
3049   /* We must allocate the symbol in our .dynbss section, which will
3050      become part of the .bss section of the executable.  There will be
3051      an entry for this symbol in the .dynsym section.  The dynamic
3052      object will contain position independent code, so all references
3053      from the dynamic object to this symbol will go through the global
3054      offset table.  The dynamic linker will use the .dynsym entry to
3055      determine the address it must put in the global offset table, so
3056      both the dynamic object and the regular object will refer to the
3057      same memory location for the variable.  */
3058 
3059   s = bfd_get_section_by_name (dynobj, ".dynbss");
3060   BFD_ASSERT (s != NULL);
3061 
3062   /* We must generate a R_CRIS_COPY reloc to tell the dynamic linker to
3063      copy the initial value out of the dynamic object and into the
3064      runtime process image.  We need to remember the offset into the
3065      .rela.bss section we are going to use.  */
3066   if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
3067     {
3068       asection *srel;
3069 
3070       srel = bfd_get_section_by_name (dynobj, ".rela.bss");
3071       BFD_ASSERT (srel != NULL);
3072       srel->size += sizeof (Elf32_External_Rela);
3073       h->needs_copy = 1;
3074     }
3075 
3076   return _bfd_elf_adjust_dynamic_copy (h, s);
3077 }
3078 
3079 /* Adjust our "subclass" elements for an indirect symbol.  */
3080 
3081 static void
elf_cris_copy_indirect_symbol(struct bfd_link_info * info,struct elf_link_hash_entry * dir,struct elf_link_hash_entry * ind)3082 elf_cris_copy_indirect_symbol (struct bfd_link_info *info,
3083 			       struct elf_link_hash_entry *dir,
3084 			       struct elf_link_hash_entry *ind)
3085 {
3086   struct elf_cris_link_hash_entry *edir, *eind;
3087 
3088   edir = (struct elf_cris_link_hash_entry *) dir;
3089   eind = (struct elf_cris_link_hash_entry *) ind;
3090 
3091   /* Only indirect symbols are replaced; we're not interested in
3092      updating any of EIND's fields for other symbols.  */
3093   if (eind->root.root.type != bfd_link_hash_indirect)
3094     {
3095       /* Still, we need to copy flags for e.g. weak definitions.  */
3096       _bfd_elf_link_hash_copy_indirect (info, dir, ind);
3097       return;
3098     }
3099 
3100   BFD_ASSERT (edir->gotplt_offset == 0 || eind->gotplt_offset == 0);
3101 
3102 #define XMOVOPZ(F, OP, Z) edir->F OP eind->F; eind->F = Z
3103 #define XMOVE(F) XMOVOPZ (F, +=, 0)
3104   if (eind->pcrel_relocs_copied != NULL)
3105     {
3106       if (edir->pcrel_relocs_copied != NULL)
3107 	{
3108 	  struct elf_cris_pcrel_relocs_copied **pp;
3109 	  struct elf_cris_pcrel_relocs_copied *p;
3110 
3111 	  /* Add reloc counts against the indirect sym to the direct sym
3112 	     list.  Merge any entries against the same section.  */
3113 	  for (pp = &eind->pcrel_relocs_copied; *pp != NULL;)
3114 	    {
3115 	      struct elf_cris_pcrel_relocs_copied *q;
3116 	      p = *pp;
3117 	      for (q = edir->pcrel_relocs_copied; q != NULL; q = q->next)
3118 		if (q->section == p->section)
3119 		  {
3120 		    q->count += p->count;
3121 		    *pp = p->next;
3122 		    break;
3123 		  }
3124 	      if (q == NULL)
3125 		pp = &p->next;
3126 	    }
3127 	  *pp = edir->pcrel_relocs_copied;
3128 	}
3129       XMOVOPZ (pcrel_relocs_copied, =, NULL);
3130     }
3131   XMOVE (gotplt_refcount);
3132   XMOVE (gotplt_offset);
3133   XMOVE (reg_got_refcount);
3134   XMOVE (tprel_refcount);
3135   XMOVE (dtp_refcount);
3136 #undef XMOVE
3137 #undef XMOVOPZ
3138 
3139   _bfd_elf_link_hash_copy_indirect (info, dir, ind);
3140 }
3141 
3142 /* Look through the relocs for a section during the first phase.  */
3143 
3144 static bfd_boolean
cris_elf_check_relocs(bfd * abfd,struct bfd_link_info * info,asection * sec,const Elf_Internal_Rela * relocs)3145 cris_elf_check_relocs (bfd *abfd,
3146 		       struct bfd_link_info *info,
3147 		       asection *sec,
3148 		       const Elf_Internal_Rela *relocs)
3149 {
3150   struct elf_cris_link_hash_table * htab;
3151   bfd *dynobj;
3152   Elf_Internal_Shdr *symtab_hdr;
3153   struct elf_link_hash_entry **sym_hashes;
3154   bfd_signed_vma *local_got_refcounts;
3155   const Elf_Internal_Rela *rel;
3156   const Elf_Internal_Rela *rel_end;
3157   asection *sgot;
3158   asection *srelgot;
3159   asection *sreloc;
3160 
3161   if (info->relocatable)
3162     return TRUE;
3163 
3164   htab = elf_cris_hash_table (info);
3165   if (htab == NULL)
3166     return FALSE;
3167 
3168   dynobj = elf_hash_table (info)->dynobj;
3169   symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3170   sym_hashes = elf_sym_hashes (abfd);
3171   local_got_refcounts = elf_local_got_refcounts (abfd);
3172 
3173   sgot = NULL;
3174   srelgot = NULL;
3175   sreloc = NULL;
3176 
3177   rel_end = relocs + sec->reloc_count;
3178   for (rel = relocs; rel < rel_end; rel++)
3179     {
3180       struct elf_link_hash_entry *h;
3181       unsigned long r_symndx;
3182       enum elf_cris_reloc_type r_type;
3183       bfd_signed_vma got_element_size = 4;
3184       unsigned long r_symndx_lgot = INT_MAX;
3185 
3186       r_symndx = ELF32_R_SYM (rel->r_info);
3187       if (r_symndx < symtab_hdr->sh_info)
3188 	{
3189 	  h = NULL;
3190 	  r_symndx_lgot = LGOT_REG_NDX (r_symndx);
3191 	}
3192       else
3193 	{
3194 	  h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3195 	  while (h->root.type == bfd_link_hash_indirect
3196 		 || h->root.type == bfd_link_hash_warning)
3197 	    h = (struct elf_link_hash_entry *) h->root.u.i.link;
3198 	}
3199 
3200       r_type = ELF32_R_TYPE (rel->r_info);
3201 
3202       /* Some relocs require linker-created sections; we need to hang them
3203 	 on the first input bfd we found that contained dynamic relocs.  */
3204       switch (r_type)
3205 	{
3206 	case R_CRIS_32_DTPREL:
3207 	  if ((sec->flags & SEC_ALLOC) == 0)
3208 	    /* This'd be a .dtpreld entry in e.g. debug info.  We have
3209 	       several different switch statements below, but none of
3210 	       that is needed; we need no preparations for resolving
3211 	       R_CRIS_32_DTPREL into a non-allocated section (debug
3212 	       info), so let's just move on to the next
3213 	       relocation.  */
3214 	    continue;
3215 	  /* Fall through.  */
3216 	case R_CRIS_16_DTPREL:
3217 	  /* The first .got.plt entry is right after the R_CRIS_DTPMOD
3218 	     entry at index 3. */
3219 	  if (htab->dtpmod_refcount == 0)
3220 	    htab->next_gotplt_entry += 8;
3221 
3222 	  htab->dtpmod_refcount++;
3223 	  /* Fall through.  */
3224 
3225 	case R_CRIS_32_IE:
3226 	case R_CRIS_32_GD:
3227 	case R_CRIS_16_GOT_GD:
3228 	case R_CRIS_32_GOT_GD:
3229 	case R_CRIS_32_GOT_TPREL:
3230 	case R_CRIS_16_GOT_TPREL:
3231 	case R_CRIS_16_GOT:
3232 	case R_CRIS_32_GOT:
3233 	case R_CRIS_32_GOTREL:
3234 	case R_CRIS_32_PLT_GOTREL:
3235 	case R_CRIS_32_PLT_PCREL:
3236 	case R_CRIS_16_GOTPLT:
3237 	case R_CRIS_32_GOTPLT:
3238 	  if (dynobj == NULL)
3239 	    {
3240 	      elf_hash_table (info)->dynobj = dynobj = abfd;
3241 
3242 	      /* We could handle this if we can get a handle on the
3243 		 output bfd in elf_cris_adjust_dynamic_symbol.  Failing
3244 		 that, we must insist on dynobj being a specific mach.  */
3245 	      if (bfd_get_mach (dynobj) == bfd_mach_cris_v10_v32)
3246 		{
3247 		  (*_bfd_error_handler)
3248 		    (_("%B, section %A:\n  v10/v32 compatible object %s"
3249 		       " must not contain a PIC relocation"),
3250 		     abfd, sec);
3251 		  return FALSE;
3252 		}
3253 
3254 	      /* Create the .got section, so we can assume it's always
3255 		 present whenever there's a dynobj.  */
3256 	      if (!_bfd_elf_create_got_section (dynobj, info))
3257 		return FALSE;
3258 	    }
3259 
3260 	  if (sgot == NULL)
3261 	    sgot = bfd_get_section_by_name (dynobj, ".got");
3262 
3263 	  if (local_got_refcounts == NULL)
3264 	    {
3265 	      bfd_size_type amt;
3266 
3267 	      /* We use index local_got_refcounts[-1] to count all
3268 		 GOT-relative relocations that do not have explicit
3269 		 GOT entries.  */
3270 	      amt = LGOT_ALLOC_NELTS_FOR (symtab_hdr->sh_info) + 1;
3271 	      amt *= sizeof (bfd_signed_vma);
3272 	      local_got_refcounts = ((bfd_signed_vma *) bfd_zalloc (abfd, amt));
3273 	      if (local_got_refcounts == NULL)
3274 		return FALSE;
3275 
3276 	      local_got_refcounts++;
3277 	      elf_local_got_refcounts (abfd) = local_got_refcounts;
3278 	    }
3279 	  break;
3280 
3281 	default:
3282 	  break;
3283 	}
3284 
3285       /* Some relocs require a global offset table (but perhaps not a
3286 	 specific GOT entry).  */
3287       switch (r_type)
3288 	{
3289 	case R_CRIS_16_DTPREL:
3290 	case R_CRIS_32_DTPREL:
3291 	  /* Not requesting .got.rela for an executable: the contents
3292 	     of the first entry is constant there.  For a shared
3293 	     library, we need .got.rela for the R_CRIS_DTPMOD
3294 	     relocation at index 3.  */
3295 	  if (!info->shared)
3296 	    break;
3297 	  /* Fall through.  */
3298 
3299 	case R_CRIS_32_IE:
3300 	case R_CRIS_32_GD:
3301 	case R_CRIS_16_GOT_GD:
3302 	case R_CRIS_32_GOT_GD:
3303 	case R_CRIS_32_GOT_TPREL:
3304 	case R_CRIS_16_GOT_TPREL:
3305 	  /* Fall through.  */
3306 
3307 	  /* For R_CRIS_16_GOTPLT and R_CRIS_32_GOTPLT, we need a GOT
3308 	     entry only for local symbols.  Unfortunately, we don't know
3309 	     until later on if there's a version script that forces the
3310 	     symbol local.  We must have the .rela.got section in place
3311 	     before we know if the symbol looks global now, so we need
3312 	     to treat the reloc just like for R_CRIS_16_GOT and
3313 	     R_CRIS_32_GOT.  */
3314 	case R_CRIS_16_GOTPLT:
3315 	case R_CRIS_32_GOTPLT:
3316 	case R_CRIS_16_GOT:
3317 	case R_CRIS_32_GOT:
3318 	  if (srelgot == NULL
3319 	      && (h != NULL || info->shared))
3320 	    {
3321 	      srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
3322 	      if (srelgot == NULL)
3323 		{
3324 		  srelgot = bfd_make_section_with_flags (dynobj,
3325 							 ".rela.got",
3326 							 (SEC_ALLOC
3327 							  | SEC_LOAD
3328 							  | SEC_HAS_CONTENTS
3329 							  | SEC_IN_MEMORY
3330 							  | SEC_LINKER_CREATED
3331 							  | SEC_READONLY));
3332 		  if (srelgot == NULL
3333 		      || !bfd_set_section_alignment (dynobj, srelgot, 2))
3334 		    return FALSE;
3335 		}
3336 	    }
3337 	  break;
3338 
3339 	default:
3340 	  break;
3341 	}
3342 
3343       /* Warn and error for invalid input.  */
3344       switch (r_type)
3345 	{
3346 	case R_CRIS_32_IE:
3347 	case R_CRIS_32_TPREL:
3348 	case R_CRIS_16_TPREL:
3349 	case R_CRIS_32_GD:
3350 	  if (info->shared)
3351 	    {
3352 	      (*_bfd_error_handler)
3353 		(_("%B, section %A:\n  relocation %s not valid"
3354 		   " in a shared object;"
3355 		   " typically an option mixup, recompile with -fPIC"),
3356 		 abfd,
3357 		 sec,
3358 		 cris_elf_howto_table[r_type].name);
3359 	      /* Don't return FALSE here; we want messages for all of
3360 		 these and the error behavior is ungraceful
3361 		 anyway.  */
3362 	    }
3363 	default:
3364 	  break;
3365 	}
3366 
3367       switch (r_type)
3368 	{
3369 	case R_CRIS_32_GD:
3370 	case R_CRIS_16_GOT_GD:
3371 	case R_CRIS_32_GOT_GD:
3372 	  /* These are requests for tls_index entries, run-time R_CRIS_DTP.  */
3373 	  got_element_size = 8;
3374 	  r_symndx_lgot = LGOT_DTP_NDX (r_symndx);
3375 	  break;
3376 
3377 	case R_CRIS_16_DTPREL:
3378 	case R_CRIS_32_DTPREL:
3379 	  /* These two just request for the constant-index
3380 	     module-local tls_index-sized GOT entry, which we add
3381 	     elsewhere.  */
3382 	  break;
3383 
3384 	case R_CRIS_32_IE:
3385 	case R_CRIS_32_GOT_TPREL:
3386 	case R_CRIS_16_GOT_TPREL:
3387 	  r_symndx_lgot = LGOT_TPREL_NDX (r_symndx);
3388 
3389 	  /* Those relocs also require that a DSO is of type
3390 	     Initial Exec.  Like other targets, we don't reset this
3391 	     flag even if the relocs are GC:ed away.  */
3392 	  if (info->shared)
3393 	    info->flags |= DF_STATIC_TLS;
3394 	  break;
3395 
3396 	  /* Let's list the other assembler-generated TLS-relocs too,
3397 	     just to show that they're not forgotten. */
3398 	case R_CRIS_16_TPREL:
3399 	case R_CRIS_32_TPREL:
3400 	default:
3401 	  break;
3402 	}
3403 
3404       switch (r_type)
3405         {
3406 	case R_CRIS_16_GOTPLT:
3407 	case R_CRIS_32_GOTPLT:
3408 	  /* Mark that we need a GOT entry if the PLT entry (and its GOT
3409 	     entry) is eliminated.  We can only do this for a non-local
3410 	     symbol.  */
3411 	  if (h != NULL)
3412 	    {
3413 	      elf_cris_hash_entry (h)->gotplt_refcount++;
3414 	      goto handle_gotplt_reloc;
3415 	    }
3416 	  /* If h is NULL then this is a local symbol, and we must make a
3417 	     GOT entry for it, so handle it like a GOT reloc.  */
3418 	  /* Fall through.  */
3419 
3420 	case R_CRIS_32_IE:
3421 	case R_CRIS_32_GD:
3422 	case R_CRIS_16_GOT_GD:
3423 	case R_CRIS_32_GOT_GD:
3424 	case R_CRIS_32_GOT_TPREL:
3425 	case R_CRIS_16_GOT_TPREL:
3426 	case R_CRIS_16_GOT:
3427 	case R_CRIS_32_GOT:
3428 	  /* This symbol requires a global offset table entry.  */
3429 	  if (h != NULL)
3430 	    {
3431 	      if (h->got.refcount == 0)
3432 		{
3433 		  /* Make sure this symbol is output as a dynamic symbol.  */
3434 		  if (h->dynindx == -1)
3435 		    {
3436 		      if (!bfd_elf_link_record_dynamic_symbol (info, h))
3437 			return FALSE;
3438 		    }
3439 		}
3440 
3441 	      /* Update the sum of reloc counts for this symbol.  */
3442 	      h->got.refcount++;
3443 
3444 	      switch (r_type)
3445 		{
3446 		case R_CRIS_16_GOT:
3447 		case R_CRIS_32_GOT:
3448 		  if (elf_cris_hash_entry (h)->reg_got_refcount == 0)
3449 		    {
3450 		      /* Allocate space in the .got section.  */
3451 		      sgot->size += got_element_size;
3452 		      /* Allocate relocation space.  */
3453 		      srelgot->size += sizeof (Elf32_External_Rela);
3454 		    }
3455 		  elf_cris_hash_entry (h)->reg_got_refcount++;
3456 		  break;
3457 
3458 		case R_CRIS_32_GD:
3459 		case R_CRIS_16_GOT_GD:
3460 		case R_CRIS_32_GOT_GD:
3461 		  if (elf_cris_hash_entry (h)->dtp_refcount == 0)
3462 		    {
3463 		      /* Allocate space in the .got section.  */
3464 		      sgot->size += got_element_size;
3465 		      /* Allocate relocation space.  */
3466 		      srelgot->size += sizeof (Elf32_External_Rela);
3467 		    }
3468 		  elf_cris_hash_entry (h)->dtp_refcount++;
3469 		  break;
3470 
3471 		case R_CRIS_32_IE:
3472 		case R_CRIS_32_GOT_TPREL:
3473 		case R_CRIS_16_GOT_TPREL:
3474 		  if (elf_cris_hash_entry (h)->tprel_refcount == 0)
3475 		    {
3476 		      /* Allocate space in the .got section.  */
3477 		      sgot->size += got_element_size;
3478 		      /* Allocate relocation space.  */
3479 		      srelgot->size += sizeof (Elf32_External_Rela);
3480 		    }
3481 		  elf_cris_hash_entry (h)->tprel_refcount++;
3482 		  break;
3483 
3484 		default:
3485 		  BFD_FAIL ();
3486 		  break;
3487 		}
3488 	    }
3489 	  else
3490 	    {
3491 	      /* This is a global offset table entry for a local symbol.  */
3492 	      if (local_got_refcounts[r_symndx_lgot] == 0)
3493 		{
3494 		  sgot->size += got_element_size;
3495 		  if (info->shared)
3496 		    {
3497 		      /* If we are generating a shared object, we need
3498 			 to output a R_CRIS_RELATIVE reloc so that the
3499 			 dynamic linker can adjust this GOT entry.
3500 			 Similarly for non-regular got entries.  */
3501 		      srelgot->size += sizeof (Elf32_External_Rela);
3502 		    }
3503 		}
3504 	      /* Update the reloc-specific count.  */
3505 	      local_got_refcounts[r_symndx_lgot]++;
3506 
3507 	      /* This one is the sum of all the others.  */
3508 	      local_got_refcounts[r_symndx]++;
3509 	    }
3510 	  break;
3511 
3512 	case R_CRIS_16_DTPREL:
3513 	case R_CRIS_32_DTPREL:
3514 	case R_CRIS_32_GOTREL:
3515 	  /* This reference requires a global offset table.
3516 	     FIXME: The actual refcount isn't used currently; the .got
3517 	     section can't be removed if there were any references in the
3518 	     input.  */
3519 	  local_got_refcounts[-1]++;
3520 	  break;
3521 
3522 	handle_gotplt_reloc:
3523 
3524 	case R_CRIS_32_PLT_GOTREL:
3525 	  /* This reference requires a global offset table.  */
3526 	  local_got_refcounts[-1]++;
3527 	  /* Fall through.  */
3528 
3529 	case R_CRIS_32_PLT_PCREL:
3530 	  /* This symbol requires a procedure linkage table entry.  We
3531 	     actually build the entry in adjust_dynamic_symbol,
3532              because this might be a case of linking PIC code which is
3533              never referenced by a dynamic object, in which case we
3534              don't need to generate a procedure linkage table entry
3535              after all.  */
3536 
3537 	  /* Beware: if we'd check for visibility of the symbol here
3538 	     (and not marking the need for a PLT when non-visible), we'd
3539 	     get into trouble with keeping handling consistent with
3540 	     regards to relocs found before definition and GOTPLT
3541 	     handling.  Eliminable PLT entries will be dealt with later
3542 	     anyway.  */
3543 	  if (h == NULL)
3544 	    continue;
3545 
3546 	  h->needs_plt = 1;
3547 	  h->plt.refcount++;
3548 	  break;
3549 
3550 	case R_CRIS_8:
3551 	case R_CRIS_16:
3552 	case R_CRIS_32:
3553 	  /* Let's help debug shared library creation.  Any of these
3554 	     relocs *can* be used in shared libs, but pages containing
3555 	     them cannot be shared, so they're not appropriate for
3556 	     common use.  Don't warn for sections we don't care about,
3557 	     such as debug sections or non-constant sections.  We
3558 	     can't help tables of (global) function pointers, for
3559 	     example, though they must be emitted in a (writable) data
3560 	     section to avoid having impure text sections.  */
3561 	  if (info->shared
3562 	      && (sec->flags & SEC_ALLOC) != 0
3563 	      && (sec->flags & SEC_READONLY) != 0)
3564 	    {
3565 	      /* FIXME: How do we make this optionally a warning only?  */
3566 	      (*_bfd_error_handler)
3567 		(_("%B, section %A:\n  relocation %s should not"
3568 		   " be used in a shared object; recompile with -fPIC"),
3569 		 abfd,
3570 		 sec,
3571 		 cris_elf_howto_table[r_type].name);
3572 	    }
3573 	  if (h != NULL)
3574 	    {
3575 	      h->non_got_ref = 1;
3576 
3577 	      /* Make sure a plt entry is created for this symbol if it
3578 		 turns out to be a function defined by a dynamic object.  */
3579 	      if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
3580 		h->plt.refcount++;
3581 	    }
3582 
3583 	  /* If we are creating a shared library and this is not a local
3584 	     symbol, we need to copy the reloc into the shared library.
3585 	     However when linking with -Bsymbolic and this is a global
3586 	     symbol which is defined in an object we are including in the
3587 	     link (i.e., DEF_REGULAR is set), then we can resolve the
3588 	     reloc directly.  At this point we have not seen all the input
3589 	     files, so it is possible that DEF_REGULAR is not set now but
3590 	     will be set later (it is never cleared).  In case of a weak
3591 	     definition, DEF_REGULAR may be cleared later by a strong
3592 	     definition in a shared library.  We account for that
3593 	     possibility below by storing information in the relocs_copied
3594 	     field of the hash table entry.  A similar situation occurs
3595 	     when creating shared libraries and symbol visibility changes
3596 	     render the symbol local.  */
3597 
3598 	  /* No need to do anything if we're not creating a shared object.  */
3599 	  if (! info->shared)
3600 	    break;
3601 
3602 	  /* We don't need to handle relocs into sections not going into
3603 	     the "real" output.  */
3604 	  if ((sec->flags & SEC_ALLOC) == 0)
3605 	    break;
3606 
3607 	  /* We may need to create a reloc section in the dynobj and made room
3608 	     for this reloc.  */
3609 	  if (sreloc == NULL)
3610 	    {
3611 	      sreloc = _bfd_elf_make_dynamic_reloc_section
3612 		(sec, dynobj, 2, abfd, /*rela?*/ TRUE);
3613 
3614 	      if (sreloc == NULL)
3615 		return FALSE;
3616 	    }
3617 
3618 	  if (sec->flags & SEC_READONLY)
3619 	    info->flags |= DF_TEXTREL;
3620 
3621 	  sreloc->size += sizeof (Elf32_External_Rela);
3622 	  break;
3623 
3624 	case R_CRIS_8_PCREL:
3625 	case R_CRIS_16_PCREL:
3626 	case R_CRIS_32_PCREL:
3627 	  if (h != NULL)
3628 	    {
3629 	      h->non_got_ref = 1;
3630 
3631 	      /* Make sure a plt entry is created for this symbol if it
3632 		 turns out to be a function defined by a dynamic object.  */
3633 	      if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
3634 		h->plt.refcount++;
3635 	    }
3636 
3637 	  /* If we are creating a shared library and this is not a local
3638 	     symbol, we need to copy the reloc into the shared library.
3639 	     However when linking with -Bsymbolic and this is a global
3640 	     symbol which is defined in an object we are including in the
3641 	     link (i.e., DEF_REGULAR is set), then we can resolve the
3642 	     reloc directly.  At this point we have not seen all the input
3643 	     files, so it is possible that DEF_REGULAR is not set now but
3644 	     will be set later (it is never cleared).  In case of a weak
3645 	     definition, DEF_REGULAR may be cleared later by a strong
3646 	     definition in a shared library.  We account for that
3647 	     possibility below by storing information in the relocs_copied
3648 	     field of the hash table entry.  A similar situation occurs
3649 	     when creating shared libraries and symbol visibility changes
3650 	     render the symbol local.  */
3651 
3652 	  /* No need to do anything if we're not creating a shared object.  */
3653 	  if (! info->shared)
3654 	    break;
3655 
3656 	  /* We don't need to handle relocs into sections not going into
3657 	     the "real" output.  */
3658 	  if ((sec->flags & SEC_ALLOC) == 0)
3659 	    break;
3660 
3661 	  /* If the symbol is local, then we know already we can
3662 	     eliminate the reloc.  */
3663 	  if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3664 	    break;
3665 
3666 	  /* If this is with -Bsymbolic and the symbol isn't weak, and
3667 	     is defined by an ordinary object (the ones we include in
3668 	     this shared library) then we can also eliminate the
3669 	     reloc.  See comment above for more eliminable cases which
3670 	     we can't identify at this time.  */
3671 	  if (info->symbolic
3672 	      && h->root.type != bfd_link_hash_defweak
3673 	      && h->def_regular)
3674 	    break;
3675 
3676 	  /* We may need to create a reloc section in the dynobj and made room
3677 	     for this reloc.  */
3678 	  if (sreloc == NULL)
3679 	    {
3680 	      sreloc = _bfd_elf_make_dynamic_reloc_section
3681 		(sec, dynobj, 2, abfd, /*rela?*/ TRUE);
3682 
3683 	      if (sreloc == NULL)
3684 		return FALSE;
3685 	    }
3686 
3687 	  sreloc->size += sizeof (Elf32_External_Rela);
3688 
3689 	  /* We count the number of PC relative relocations we have
3690 	     entered for this symbol, so that we can discard them
3691 	     again if the symbol is later defined by a regular object.
3692 	     We know that h is really a pointer to an
3693 	     elf_cris_link_hash_entry.  */
3694 	  {
3695 	    struct elf_cris_link_hash_entry *eh;
3696 	    struct elf_cris_pcrel_relocs_copied *p;
3697 
3698 	    eh = elf_cris_hash_entry (h);
3699 
3700 	    for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
3701 	      if (p->section == sec)
3702 		break;
3703 
3704 	    if (p == NULL)
3705 	      {
3706 		p = ((struct elf_cris_pcrel_relocs_copied *)
3707 		     bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
3708 		if (p == NULL)
3709 		  return FALSE;
3710 		p->next = eh->pcrel_relocs_copied;
3711 		eh->pcrel_relocs_copied = p;
3712 		p->section = sec;
3713 		p->count = 0;
3714 		p->r_type = r_type;
3715 	      }
3716 
3717 	    ++p->count;
3718 	  }
3719 	  break;
3720 
3721         /* This relocation describes the C++ object vtable hierarchy.
3722            Reconstruct it for later use during GC.  */
3723         case R_CRIS_GNU_VTINHERIT:
3724           if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3725             return FALSE;
3726           break;
3727 
3728         /* This relocation describes which C++ vtable entries are actually
3729            used.  Record for later use during GC.  */
3730         case R_CRIS_GNU_VTENTRY:
3731           BFD_ASSERT (h != NULL);
3732           if (h != NULL
3733               && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3734             return FALSE;
3735           break;
3736 
3737 	case R_CRIS_16_TPREL:
3738 	case R_CRIS_32_TPREL:
3739 	  /* Already warned above, when necessary.  */
3740 	  break;
3741 
3742 	default:
3743 	  /* Other relocs do not appear here.  */
3744 	  bfd_set_error (bfd_error_bad_value);
3745 	  return FALSE;
3746         }
3747     }
3748 
3749   return TRUE;
3750 }
3751 
3752 /* Set the sizes of the dynamic sections.  */
3753 
3754 static bfd_boolean
elf_cris_size_dynamic_sections(bfd * output_bfd ATTRIBUTE_UNUSED,struct bfd_link_info * info)3755 elf_cris_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
3756 				struct bfd_link_info *info)
3757 {
3758   struct elf_cris_link_hash_table * htab;
3759   bfd *dynobj;
3760   asection *s;
3761   bfd_boolean plt;
3762   bfd_boolean relocs;
3763 
3764   htab = elf_cris_hash_table (info);
3765   if (htab == NULL)
3766     return FALSE;
3767 
3768   dynobj = elf_hash_table (info)->dynobj;
3769   BFD_ASSERT (dynobj != NULL);
3770 
3771   if (elf_hash_table (info)->dynamic_sections_created)
3772     {
3773       /* Set the contents of the .interp section to the interpreter.  */
3774       if (info->executable)
3775 	{
3776 	  s = bfd_get_section_by_name (dynobj, ".interp");
3777 	  BFD_ASSERT (s != NULL);
3778 	  s->size = sizeof ELF_DYNAMIC_INTERPRETER;
3779 	  s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
3780 	}
3781     }
3782   else
3783     {
3784       /* Adjust all expected GOTPLT uses to use a GOT entry instead.  */
3785       elf_cris_link_hash_traverse (htab, elf_cris_adjust_gotplt_to_got,
3786 				   info);
3787 
3788       /* We may have created entries in the .rela.got section.
3789 	 However, if we are not creating the dynamic sections, we will
3790 	 not actually use these entries.  Reset the size of .rela.got,
3791 	 which will cause it to get stripped from the output file
3792 	 below.  */
3793       s = bfd_get_section_by_name (dynobj, ".rela.got");
3794       if (s != NULL)
3795 	s->size = 0;
3796     }
3797 
3798   /* If this is a -Bsymbolic shared link, then we need to discard all PC
3799      relative relocs against symbols defined in a regular object.  We
3800      allocated space for them in the check_relocs routine, but we will not
3801      fill them in in the relocate_section routine.  We also discard space
3802      for relocs that have become for local symbols due to symbol
3803      visibility changes.  For programs, we discard space for relocs for
3804      symbols not referenced by any dynamic object.  */
3805   if (info->shared)
3806     elf_cris_link_hash_traverse (htab,
3807 				 elf_cris_discard_excess_dso_dynamics,
3808 				 info);
3809   else
3810     elf_cris_link_hash_traverse (htab,
3811 				 elf_cris_discard_excess_program_dynamics,
3812 				 info);
3813 
3814   /* The check_relocs and adjust_dynamic_symbol entry points have
3815      determined the sizes of the various dynamic sections.  Allocate
3816      memory for them.  */
3817   plt = FALSE;
3818   relocs = FALSE;
3819   for (s = dynobj->sections; s != NULL; s = s->next)
3820     {
3821       const char *name;
3822 
3823       if ((s->flags & SEC_LINKER_CREATED) == 0)
3824 	continue;
3825 
3826       /* It's OK to base decisions on the section name, because none
3827 	 of the dynobj section names depend upon the input files.  */
3828       name = bfd_get_section_name (dynobj, s);
3829 
3830       if (strcmp (name, ".plt") == 0)
3831 	{
3832 	  /* Remember whether there is a PLT.  */
3833 	  plt = s->size != 0;
3834 	}
3835       else if (strcmp (name, ".got.plt") == 0)
3836 	{
3837 	  /* The .got.plt contains the .got header as well as the
3838 	     actual .got.plt contents.  The .got header may contain a
3839 	     R_CRIS_DTPMOD entry at index 3.  */
3840 	  s->size += htab->dtpmod_refcount != 0
3841 	    ? 8 : 0;
3842 	}
3843       else if (CONST_STRNEQ (name, ".rela"))
3844 	{
3845 	  if (strcmp (name, ".rela.got") == 0
3846 	      && htab->dtpmod_refcount != 0
3847 	      && info->shared)
3848 	    s->size += sizeof (Elf32_External_Rela);
3849 
3850 	  if (s->size != 0)
3851 	    {
3852 	      /* Remember whether there are any reloc sections other
3853                  than .rela.plt.  */
3854 	      if (strcmp (name, ".rela.plt") != 0)
3855 		  relocs = TRUE;
3856 
3857 	      /* We use the reloc_count field as a counter if we need
3858 		 to copy relocs into the output file.  */
3859 	      s->reloc_count = 0;
3860 	    }
3861 	}
3862       else if (! CONST_STRNEQ (name, ".got")
3863 	       && strcmp (name, ".dynbss") != 0)
3864 	{
3865 	  /* It's not one of our sections, so don't allocate space.  */
3866 	  continue;
3867 	}
3868 
3869       if (s->size == 0)
3870 	{
3871 	  /* If we don't need this section, strip it from the
3872 	     output file.  This is mostly to handle .rela.bss and
3873 	     .rela.plt.  We must create both sections in
3874 	     create_dynamic_sections, because they must be created
3875 	     before the linker maps input sections to output
3876 	     sections.  The linker does that before
3877 	     adjust_dynamic_symbol is called, and it is that
3878 	     function which decides whether anything needs to go
3879 	     into these sections.  */
3880 	  s->flags |= SEC_EXCLUDE;
3881 	  continue;
3882 	}
3883 
3884       if ((s->flags & SEC_HAS_CONTENTS) == 0)
3885 	continue;
3886 
3887       /* Allocate memory for the section contents. We use bfd_zalloc here
3888 	 in case unused entries are not reclaimed before the section's
3889 	 contents are written out.  This should not happen, but this way
3890 	 if it does, we will not write out garbage.  For reloc sections,
3891 	 this will make entries have the type R_CRIS_NONE.  */
3892       s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
3893       if (s->contents == NULL)
3894 	return FALSE;
3895     }
3896 
3897   if (elf_hash_table (info)->dynamic_sections_created)
3898     {
3899       /* Add some entries to the .dynamic section.  We fill in the
3900 	 values later, in elf_cris_finish_dynamic_sections, but we
3901 	 must add the entries now so that we get the correct size for
3902 	 the .dynamic section.  The DT_DEBUG entry is filled in by the
3903 	 dynamic linker and used by the debugger.  */
3904 #define add_dynamic_entry(TAG, VAL) \
3905   _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3906 
3907       if (!info->shared)
3908 	{
3909 	  if (!add_dynamic_entry (DT_DEBUG, 0))
3910 	    return FALSE;
3911 	}
3912 
3913       if (plt)
3914 	{
3915 	  if (!add_dynamic_entry (DT_PLTGOT, 0)
3916 	      || !add_dynamic_entry (DT_PLTRELSZ, 0)
3917 	      || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3918 	      || !add_dynamic_entry (DT_JMPREL, 0))
3919 	    return FALSE;
3920 	}
3921 
3922       if (relocs)
3923 	{
3924 	  if (!add_dynamic_entry (DT_RELA, 0)
3925 	      || !add_dynamic_entry (DT_RELASZ, 0)
3926 	      || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3927 	    return FALSE;
3928 	}
3929 
3930       if ((info->flags & DF_TEXTREL) != 0)
3931 	{
3932 	  if (!add_dynamic_entry (DT_TEXTREL, 0))
3933 	    return FALSE;
3934 	  info->flags |= DF_TEXTREL;
3935 	}
3936     }
3937 #undef add_dynamic_entry
3938 
3939   return TRUE;
3940 }
3941 
3942 /* This function is called via elf_cris_link_hash_traverse if we are
3943    creating a shared object.  In the -Bsymbolic case, it discards the
3944    space allocated to copy PC relative relocs against symbols which
3945    are defined in regular objects.  For the normal non-symbolic case,
3946    we also discard space for relocs that have become local due to
3947    symbol visibility changes.  We allocated space for them in the
3948    check_relocs routine, but we won't fill them in in the
3949    relocate_section routine.  */
3950 
3951 static bfd_boolean
elf_cris_discard_excess_dso_dynamics(h,inf)3952 elf_cris_discard_excess_dso_dynamics (h, inf)
3953      struct elf_cris_link_hash_entry *h;
3954      PTR inf;
3955 {
3956   struct elf_cris_pcrel_relocs_copied *s;
3957   struct bfd_link_info *info = (struct bfd_link_info *) inf;
3958 
3959   if (h->root.root.type == bfd_link_hash_warning)
3960     h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link;
3961 
3962   /* If a symbol has been forced local or we have found a regular
3963      definition for the symbolic link case, then we won't be needing
3964      any relocs.  */
3965   if (h->root.def_regular
3966       && (h->root.forced_local
3967 	  || info->symbolic))
3968     {
3969       for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
3970 	{
3971 	  asection *sreloc
3972 	    = _bfd_elf_get_dynamic_reloc_section (elf_hash_table (info)
3973 						  ->dynobj,
3974 						  s->section,
3975 						  /*rela?*/ TRUE);
3976 	  sreloc->size -= s->count * sizeof (Elf32_External_Rela);
3977 	}
3978       return TRUE;
3979     }
3980 
3981   /* If we have accounted for PC-relative relocs for read-only
3982      sections, now is the time to warn for them.  We can't do it in
3983      cris_elf_check_relocs, because we don't know the status of all
3984      symbols at that time (and it's common to force symbols local
3985      late).  */
3986 
3987   for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
3988     if ((s->section->flags & SEC_READONLY) != 0)
3989       {
3990 	/* FIXME: How do we make this optionally a warning only?  */
3991 	(*_bfd_error_handler)
3992 	  (_("%B, section `%A', to symbol `%s':\n"
3993 	     "  relocation %s should not be used"
3994 	     " in a shared object; recompile with -fPIC"),
3995 	   s->section->owner,
3996 	   s->section,
3997 	   h->root.root.root.string,
3998 	   cris_elf_howto_table[s->r_type].name);
3999 
4000 	info->flags |= DF_TEXTREL;
4001       }
4002 
4003   return TRUE;
4004 }
4005 
4006 /* This function is called via elf_cris_link_hash_traverse if we are *not*
4007    creating a shared object.  We discard space for relocs for symbols put
4008    in the .got, but which we found we do not have to resolve at run-time.  */
4009 
4010 static bfd_boolean
elf_cris_discard_excess_program_dynamics(h,inf)4011 elf_cris_discard_excess_program_dynamics (h, inf)
4012      struct elf_cris_link_hash_entry *h;
4013      PTR inf;
4014 {
4015   struct bfd_link_info *info = (struct bfd_link_info *) inf;
4016 
4017   if (h->root.root.type == bfd_link_hash_warning)
4018     h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link;
4019 
4020   /* If we're not creating a shared library and have a symbol which is
4021      referred to by .got references, but the symbol is defined locally,
4022      (or rather, not defined by a DSO) then lose the reloc for the .got
4023      (don't allocate room for it).  Likewise for relocs for something
4024      for which we create a PLT.  */
4025   if (!h->root.def_dynamic
4026       || h->root.plt.refcount > 0)
4027     {
4028       if (h->reg_got_refcount > 0
4029 	  /* The size of this section is only valid and in sync with the
4030 	     various reference counts if we do dynamic; don't decrement it
4031 	     otherwise.  */
4032 	  && elf_hash_table (info)->dynamic_sections_created)
4033 	{
4034 	  bfd *dynobj = elf_hash_table (info)->dynobj;
4035 	  asection *srelgot;
4036 
4037 	  BFD_ASSERT (dynobj != NULL);
4038 
4039 	  srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
4040 
4041 	  BFD_ASSERT (srelgot != NULL);
4042 
4043 	  srelgot->size -= sizeof (Elf32_External_Rela);
4044 	}
4045 
4046       /* If the locally-defined symbol isn't used by a DSO, then we don't
4047 	 have to export it as a dynamic symbol.  This was already done for
4048 	 functions; doing this for all symbols would presumably not
4049 	 introduce new problems.  Of course we don't do this if we're
4050 	 exporting all dynamic symbols.  */
4051       if (! info->export_dynamic
4052 	  && h->root.dynindx != -1
4053 	  && !h->root.def_dynamic
4054 	  && !h->root.ref_dynamic)
4055 	{
4056 	  h->root.dynindx = -1;
4057 	  _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4058 				  h->root.dynstr_index);
4059 	}
4060     }
4061 
4062   return TRUE;
4063 }
4064 
4065 /* Reject a file depending on presence and expectation of prefixed
4066    underscores on symbols.  */
4067 
4068 static bfd_boolean
cris_elf_object_p(abfd)4069 cris_elf_object_p (abfd)
4070      bfd *abfd;
4071 {
4072   if (! cris_elf_set_mach_from_flags (abfd, elf_elfheader (abfd)->e_flags))
4073     return FALSE;
4074 
4075   if ((elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE))
4076     return (bfd_get_symbol_leading_char (abfd) == '_');
4077   else
4078     return (bfd_get_symbol_leading_char (abfd) == 0);
4079 }
4080 
4081 /* Mark presence or absence of leading underscore.  Set machine type
4082    flags from mach type.  */
4083 
4084 static void
cris_elf_final_write_processing(abfd,linker)4085 cris_elf_final_write_processing (abfd, linker)
4086      bfd *abfd;
4087      bfd_boolean linker ATTRIBUTE_UNUSED;
4088 {
4089   unsigned long e_flags = elf_elfheader (abfd)->e_flags;
4090 
4091   e_flags &= ~EF_CRIS_UNDERSCORE;
4092   if (bfd_get_symbol_leading_char (abfd) == '_')
4093     e_flags |= EF_CRIS_UNDERSCORE;
4094 
4095   switch (bfd_get_mach (abfd))
4096     {
4097     case bfd_mach_cris_v0_v10:
4098       e_flags |= EF_CRIS_VARIANT_ANY_V0_V10;
4099       break;
4100 
4101     case bfd_mach_cris_v10_v32:
4102       e_flags |= EF_CRIS_VARIANT_COMMON_V10_V32;
4103       break;
4104 
4105     case bfd_mach_cris_v32:
4106       e_flags |= EF_CRIS_VARIANT_V32;
4107       break;
4108 
4109     default:
4110       _bfd_abort (__FILE__, __LINE__,
4111 		  _("Unexpected machine number"));
4112     }
4113 
4114   elf_elfheader (abfd)->e_flags = e_flags;
4115 }
4116 
4117 /* Set the mach type from e_flags value.  */
4118 
4119 static bfd_boolean
cris_elf_set_mach_from_flags(abfd,flags)4120 cris_elf_set_mach_from_flags (abfd, flags)
4121      bfd *abfd;
4122      unsigned long flags;
4123 {
4124   switch (flags & EF_CRIS_VARIANT_MASK)
4125     {
4126     case EF_CRIS_VARIANT_ANY_V0_V10:
4127       bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v0_v10);
4128       break;
4129 
4130     case EF_CRIS_VARIANT_V32:
4131       bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v32);
4132       break;
4133 
4134     case EF_CRIS_VARIANT_COMMON_V10_V32:
4135       bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v10_v32);
4136       break;
4137 
4138     default:
4139       /* Since we don't recognize them, we obviously can't support them
4140 	 with this code; we'd have to require that all future handling
4141 	 would be optional.  */
4142       bfd_set_error (bfd_error_wrong_format);
4143       return FALSE;
4144     }
4145 
4146   return TRUE;
4147 }
4148 
4149 /* Display the flags field.  */
4150 
4151 static bfd_boolean
cris_elf_print_private_bfd_data(abfd,ptr)4152 cris_elf_print_private_bfd_data (abfd, ptr)
4153      bfd *abfd;
4154      PTR ptr;
4155 {
4156   FILE *file = (FILE *) ptr;
4157 
4158   BFD_ASSERT (abfd != NULL && ptr != NULL);
4159 
4160   _bfd_elf_print_private_bfd_data (abfd, ptr);
4161 
4162   fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
4163 
4164   if (elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE)
4165     fprintf (file, _(" [symbols have a _ prefix]"));
4166   if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
4167       == EF_CRIS_VARIANT_COMMON_V10_V32)
4168     fprintf (file, _(" [v10 and v32]"));
4169   if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
4170       == EF_CRIS_VARIANT_V32)
4171     fprintf (file, _(" [v32]"));
4172 
4173   fputc ('\n', file);
4174   return TRUE;
4175 }
4176 
4177 /* Don't mix files with and without a leading underscore.  */
4178 
4179 static bfd_boolean
cris_elf_merge_private_bfd_data(ibfd,obfd)4180 cris_elf_merge_private_bfd_data (ibfd, obfd)
4181      bfd *ibfd;
4182      bfd *obfd;
4183 {
4184   int imach, omach;
4185 
4186   if (! _bfd_generic_verify_endian_match (ibfd, obfd))
4187     return FALSE;
4188 
4189   if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4190       || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4191     return TRUE;
4192 
4193   imach = bfd_get_mach (ibfd);
4194 
4195   if (! elf_flags_init (obfd))
4196     {
4197       /* This happens when ld starts out with a 'blank' output file.  */
4198       elf_flags_init (obfd) = TRUE;
4199 
4200       /* We ignore the linker-set mach, and instead set it according to
4201 	 the first input file.  This would also happen if we could
4202 	 somehow filter out the OUTPUT_ARCH () setting from elf.sc.
4203 	 This allows us to keep the same linker config across
4204 	 cris(v0..v10) and crisv32.  The drawback is that we can't force
4205 	 the output type, which might be a sane thing to do for a
4206 	 v10+v32 compatibility object.  */
4207       if (! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
4208 	return FALSE;
4209     }
4210 
4211   if (bfd_get_symbol_leading_char (ibfd)
4212       != bfd_get_symbol_leading_char (obfd))
4213     {
4214       (*_bfd_error_handler)
4215 	(bfd_get_symbol_leading_char (ibfd) == '_'
4216 	 ? _("%B: uses _-prefixed symbols, but writing file with non-prefixed symbols")
4217 	 : _("%B: uses non-prefixed symbols, but writing file with _-prefixed symbols"),
4218 	 ibfd);
4219       bfd_set_error (bfd_error_bad_value);
4220       return FALSE;
4221     }
4222 
4223   omach = bfd_get_mach (obfd);
4224 
4225   if (imach != omach)
4226     {
4227       /* We can get an incompatible combination only if either is
4228 	 bfd_mach_cris_v32, and the other one isn't compatible.  */
4229       if ((imach == bfd_mach_cris_v32
4230 	   && omach != bfd_mach_cris_v10_v32)
4231 	  || (omach == bfd_mach_cris_v32
4232 	      && imach != bfd_mach_cris_v10_v32))
4233 	{
4234 	  (*_bfd_error_handler)
4235 	    ((imach == bfd_mach_cris_v32)
4236 	     ? _("%B contains CRIS v32 code, incompatible"
4237 		 " with previous objects")
4238 	     : _("%B contains non-CRIS-v32 code, incompatible"
4239 		 " with previous objects"),
4240 	     ibfd);
4241 	  bfd_set_error (bfd_error_bad_value);
4242 	  return FALSE;
4243 	}
4244 
4245       /* We don't have to check the case where the input is compatible
4246 	 with v10 and v32, because the output is already known to be set
4247 	 to the other (compatible) mach.  */
4248       if (omach == bfd_mach_cris_v10_v32
4249 	  && ! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
4250 	return FALSE;
4251     }
4252 
4253   return TRUE;
4254 }
4255 
4256 /* Do side-effects of e_flags copying to obfd.  */
4257 
4258 static bfd_boolean
cris_elf_copy_private_bfd_data(ibfd,obfd)4259 cris_elf_copy_private_bfd_data (ibfd, obfd)
4260      bfd *ibfd;
4261      bfd *obfd;
4262 {
4263   /* Call the base function.  */
4264   if (!_bfd_elf_copy_private_bfd_data (ibfd, obfd))
4265     return FALSE;
4266 
4267   /* If output is big-endian for some obscure reason, stop here.  */
4268   if (_bfd_generic_verify_endian_match (ibfd, obfd) == FALSE)
4269     return FALSE;
4270 
4271   if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4272       || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4273     return TRUE;
4274 
4275   /* Do what we really came here for.  */
4276   return bfd_set_arch_mach (obfd, bfd_arch_cris, bfd_get_mach (ibfd));
4277 }
4278 
4279 static enum elf_reloc_type_class
elf_cris_reloc_type_class(rela)4280 elf_cris_reloc_type_class (rela)
4281      const Elf_Internal_Rela *rela;
4282 {
4283   enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rela->r_info);
4284   switch (r_type)
4285     {
4286     case R_CRIS_RELATIVE:
4287       return reloc_class_relative;
4288     case R_CRIS_JUMP_SLOT:
4289       return reloc_class_plt;
4290     case R_CRIS_COPY:
4291       return reloc_class_copy;
4292     default:
4293       return reloc_class_normal;
4294     }
4295 }
4296 
4297 /* The elf_backend_got_elt_size worker.  For one symbol, we can have up to
4298    two GOT entries from three types with two different sizes.  We handle
4299    it as a single entry, so we can use the regular offset-calculation
4300    machinery.  */
4301 
4302 static bfd_vma
elf_cris_got_elt_size(bfd * abfd ATTRIBUTE_UNUSED,struct bfd_link_info * info ATTRIBUTE_UNUSED,struct elf_link_hash_entry * hr,bfd * ibfd,unsigned long symndx)4303 elf_cris_got_elt_size (bfd *abfd ATTRIBUTE_UNUSED,
4304 		       struct bfd_link_info *info ATTRIBUTE_UNUSED,
4305 		       struct elf_link_hash_entry *hr,
4306 		       bfd *ibfd,
4307 		       unsigned long symndx)
4308 {
4309   struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) hr;
4310   bfd_vma eltsiz = 0;
4311 
4312   /* We may have one regular GOT entry or up to two TLS GOT
4313      entries.  */
4314   if (h == NULL)
4315     {
4316       Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4317       bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (ibfd);
4318 
4319       BFD_ASSERT (local_got_refcounts != NULL);
4320 
4321       if (local_got_refcounts[LGOT_REG_NDX (symndx)] > 0)
4322 	{
4323 	  /* We can't have a variable referred to both as a regular
4324 	     variable and through TLS relocs.  */
4325 	  BFD_ASSERT (local_got_refcounts[LGOT_DTP_NDX (symndx)] == 0
4326 		      && local_got_refcounts[LGOT_TPREL_NDX (symndx)] == 0);
4327 	  return 4;
4328 	}
4329 
4330       if (local_got_refcounts[LGOT_DTP_NDX (symndx)] > 0)
4331 	eltsiz += 8;
4332 
4333       if (local_got_refcounts[LGOT_TPREL_NDX (symndx)] > 0)
4334 	eltsiz += 4;
4335     }
4336   else
4337     {
4338       struct elf_cris_link_hash_entry *hh = elf_cris_hash_entry (h);
4339       if (hh->reg_got_refcount > 0)
4340 	{
4341 	  /* The actual error-on-input is emitted elsewhere.  */
4342 	  BFD_ASSERT (hh->dtp_refcount == 0 && hh->tprel_refcount == 0);
4343 	  return 4;
4344 	}
4345 
4346       if (hh->dtp_refcount > 0)
4347 	eltsiz += 8;
4348 
4349       if (hh->tprel_refcount > 0)
4350 	eltsiz += 4;
4351     }
4352 
4353   /* We're only called when h->got.refcount is non-zero, so we must
4354      have a non-zero size.  */
4355   BFD_ASSERT (eltsiz != 0);
4356   return eltsiz;
4357 }
4358 
4359 #define ELF_ARCH		bfd_arch_cris
4360 #define ELF_TARGET_ID		CRIS_ELF_DATA
4361 #define ELF_MACHINE_CODE	EM_CRIS
4362 #define ELF_MAXPAGESIZE		0x2000
4363 
4364 #define TARGET_LITTLE_SYM	bfd_elf32_cris_vec
4365 #define TARGET_LITTLE_NAME	"elf32-cris"
4366 #define elf_symbol_leading_char 0
4367 
4368 #define elf_info_to_howto_rel			NULL
4369 #define elf_info_to_howto			cris_info_to_howto_rela
4370 #define elf_backend_relocate_section		cris_elf_relocate_section
4371 #define elf_backend_gc_mark_hook		cris_elf_gc_mark_hook
4372 #define elf_backend_gc_sweep_hook		cris_elf_gc_sweep_hook
4373 #define elf_backend_plt_sym_val			cris_elf_plt_sym_val
4374 #define elf_backend_check_relocs                cris_elf_check_relocs
4375 #define elf_backend_grok_prstatus		cris_elf_grok_prstatus
4376 #define elf_backend_grok_psinfo			cris_elf_grok_psinfo
4377 
4378 #define elf_backend_can_gc_sections		1
4379 #define elf_backend_can_refcount		1
4380 
4381 #define elf_backend_object_p			cris_elf_object_p
4382 #define elf_backend_final_write_processing \
4383 	cris_elf_final_write_processing
4384 #define bfd_elf32_bfd_print_private_bfd_data \
4385 	cris_elf_print_private_bfd_data
4386 #define bfd_elf32_bfd_merge_private_bfd_data \
4387 	cris_elf_merge_private_bfd_data
4388 #define bfd_elf32_bfd_copy_private_bfd_data \
4389 	cris_elf_copy_private_bfd_data
4390 
4391 #define bfd_elf32_bfd_reloc_type_lookup		cris_reloc_type_lookup
4392 #define bfd_elf32_bfd_reloc_name_lookup	cris_reloc_name_lookup
4393 
4394 #define bfd_elf32_bfd_link_hash_table_create \
4395 	elf_cris_link_hash_table_create
4396 #define elf_backend_adjust_dynamic_symbol \
4397 	elf_cris_adjust_dynamic_symbol
4398 #define elf_backend_copy_indirect_symbol \
4399 	elf_cris_copy_indirect_symbol
4400 #define elf_backend_size_dynamic_sections \
4401 	elf_cris_size_dynamic_sections
4402 #define elf_backend_init_index_section		_bfd_elf_init_1_index_section
4403 #define elf_backend_finish_dynamic_symbol \
4404 	elf_cris_finish_dynamic_symbol
4405 #define elf_backend_finish_dynamic_sections \
4406 	elf_cris_finish_dynamic_sections
4407 #define elf_backend_create_dynamic_sections \
4408 	_bfd_elf_create_dynamic_sections
4409 #define bfd_elf32_bfd_final_link \
4410 	bfd_elf_gc_common_final_link
4411 #define elf_backend_hide_symbol			elf_cris_hide_symbol
4412 #define elf_backend_reloc_type_class		elf_cris_reloc_type_class
4413 
4414 #define elf_backend_want_got_plt	1
4415 #define elf_backend_plt_readonly	1
4416 #define elf_backend_want_plt_sym	0
4417 #define elf_backend_got_header_size	12
4418 #define elf_backend_got_elt_size elf_cris_got_elt_size
4419 
4420 /* Later, we my want to optimize RELA entries into REL entries for dynamic
4421    linking and libraries (if it's a win of any significance).  Until then,
4422    take the easy route.  */
4423 #define elf_backend_may_use_rel_p 0
4424 #define elf_backend_may_use_rela_p 1
4425 #define elf_backend_rela_normal		1
4426 
4427 #include "elf32-target.h"
4428 
4429 #undef TARGET_LITTLE_SYM
4430 #undef TARGET_LITTLE_NAME
4431 #undef elf_symbol_leading_char
4432 
4433 #define TARGET_LITTLE_SYM bfd_elf32_us_cris_vec
4434 #define TARGET_LITTLE_NAME "elf32-us-cris"
4435 #define elf_symbol_leading_char '_'
4436 #undef elf32_bed
4437 #define elf32_bed elf32_us_cris_bed
4438 
4439 #include "elf32-target.h"
4440