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252b5132 RH |
1 | /* 32-bit ELF support for ARM |
2 | Copyright 1998, 1999 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of BFD, the Binary File Descriptor library. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
19 | ||
20 | ||
21 | typedef unsigned long int insn32; | |
22 | typedef unsigned short int insn16; | |
23 | ||
24 | static boolean elf32_arm_set_private_flags | |
25 | PARAMS ((bfd *, flagword)); | |
26 | static boolean elf32_arm_copy_private_bfd_data | |
27 | PARAMS ((bfd *, bfd *)); | |
28 | static boolean elf32_arm_merge_private_bfd_data | |
29 | PARAMS ((bfd *, bfd *)); | |
30 | static boolean elf32_arm_print_private_bfd_data | |
31 | PARAMS ((bfd *, PTR)); | |
f21f3fe0 | 32 | static int elf32_arm_get_symbol_type |
252b5132 RH |
33 | PARAMS (( Elf_Internal_Sym *, int)); |
34 | static struct bfd_link_hash_table *elf32_arm_link_hash_table_create | |
35 | PARAMS ((bfd *)); | |
36 | static bfd_reloc_status_type elf32_arm_final_link_relocate | |
780a67af NC |
37 | PARAMS ((reloc_howto_type *, bfd *, bfd *, asection *, bfd_byte *, |
38 | Elf_Internal_Rela *, bfd_vma, struct bfd_link_info *, asection *, | |
39 | const char *, unsigned char, struct elf_link_hash_entry *)); | |
252b5132 RH |
40 | |
41 | static insn32 insert_thumb_branch | |
42 | PARAMS ((insn32, int)); | |
43 | static struct elf_link_hash_entry *find_thumb_glue | |
44 | PARAMS ((struct bfd_link_info *, CONST char *, bfd *)); | |
45 | static struct elf_link_hash_entry *find_arm_glue | |
46 | PARAMS ((struct bfd_link_info *, CONST char *, bfd *)); | |
47 | static void record_arm_to_thumb_glue | |
48 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); | |
49 | static void record_thumb_to_arm_glue | |
50 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); | |
ba96a88f NC |
51 | static void elf32_arm_post_process_headers |
52 | PARAMS ((bfd *, struct bfd_link_info *)); | |
bcbdc74c NC |
53 | static int elf32_arm_to_thumb_stub |
54 | PARAMS ((struct bfd_link_info *, const char *, bfd *, bfd *, asection *, | |
55 | bfd_byte *, asection *, bfd_vma, bfd_signed_vma, bfd_vma)); | |
56 | static int elf32_thumb_to_arm_stub | |
57 | PARAMS ((struct bfd_link_info *, const char *, bfd *, bfd *, asection *, | |
58 | bfd_byte *, asection *, bfd_vma, bfd_signed_vma, bfd_vma)); | |
252b5132 RH |
59 | |
60 | /* The linker script knows the section names for placement. | |
61 | The entry_names are used to do simple name mangling on the stubs. | |
62 | Given a function name, and its type, the stub can be found. The | |
63 | name can be changed. The only requirement is the %s be present. | |
64 | */ | |
65 | ||
66 | #define INTERWORK_FLAG( abfd ) (elf_elfheader (abfd)->e_flags & EF_INTERWORK) | |
67 | ||
68 | #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t" | |
69 | #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb" | |
70 | ||
71 | #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7" | |
72 | #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm" | |
73 | ||
74 | /* The name of the dynamic interpreter. This is put in the .interp | |
75 | section. */ | |
76 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" | |
77 | ||
78 | /* The size in bytes of an entry in the procedure linkage table. */ | |
79 | ||
80 | #define PLT_ENTRY_SIZE 16 | |
81 | ||
82 | /* The first entry in a procedure linkage table looks like | |
83 | this. It is set up so that any shared library function that is | |
84 | called before the relocation has been set up calles the dynamic | |
85 | linker first */ | |
86 | ||
87 | static const bfd_byte elf32_arm_plt0_entry [PLT_ENTRY_SIZE] = | |
88 | { | |
89 | 0x04, 0xe0, 0x2d, 0xe5, /* str lr, [sp, #-4]! */ | |
90 | 0x10, 0xe0, 0x9f, 0xe5, /* ldr lr, [pc, #16] */ | |
91 | 0x0e, 0xe0, 0x8f, 0xe0, /* adr lr, pc, lr */ | |
92 | 0x08, 0xf0, 0xbe, 0xe5 /* ldr pc, [lr, #-4] */ | |
93 | }; | |
94 | ||
95 | /* Subsequent entries in a procedure linkage table look like | |
96 | this. */ | |
97 | ||
98 | static const bfd_byte elf32_arm_plt_entry [PLT_ENTRY_SIZE] = | |
99 | { | |
100 | 0x04, 0xc0, 0x9f, 0xe5, /* ldr ip, [pc, #4] */ | |
101 | 0x0c, 0xc0, 0x8f, 0xe0, /* add ip, pc, ip */ | |
102 | 0x00, 0xf0, 0x9c, 0xe5, /* ldr pc, [ip] */ | |
103 | 0x00, 0x00, 0x00, 0x00 /* offset to symbol in got */ | |
104 | }; | |
105 | ||
106 | ||
107 | /* The ARM linker needs to keep track of the number of relocs that it | |
108 | decides to copy in check_relocs for each symbol. This is so that | |
109 | it can discard PC relative relocs if it doesn't need them when | |
110 | linking with -Bsymbolic. We store the information in a field | |
111 | extending the regular ELF linker hash table. */ | |
112 | ||
113 | /* This structure keeps track of the number of PC relative relocs we | |
114 | have copied for a given symbol. */ | |
115 | ||
116 | struct elf32_arm_pcrel_relocs_copied | |
117 | { | |
118 | /* Next section. */ | |
119 | struct elf32_arm_pcrel_relocs_copied * next; | |
120 | /* A section in dynobj. */ | |
121 | asection * section; | |
122 | /* Number of relocs copied in this section. */ | |
123 | bfd_size_type count; | |
124 | }; | |
125 | ||
ba96a88f | 126 | /* Arm ELF linker hash entry. */ |
252b5132 RH |
127 | |
128 | struct elf32_arm_link_hash_entry | |
129 | { | |
130 | struct elf_link_hash_entry root; | |
131 | ||
132 | /* Number of PC relative relocs copied for this symbol. */ | |
133 | struct elf32_arm_pcrel_relocs_copied * pcrel_relocs_copied; | |
134 | }; | |
135 | ||
136 | /* Declare this now that the above structures are defined. */ | |
137 | ||
138 | static boolean elf32_arm_discard_copies | |
139 | PARAMS ((struct elf32_arm_link_hash_entry *, PTR)); | |
140 | ||
141 | /* Traverse an arm ELF linker hash table. */ | |
142 | ||
143 | #define elf32_arm_link_hash_traverse(table, func, info) \ | |
144 | (elf_link_hash_traverse \ | |
145 | (&(table)->root, \ | |
146 | (boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \ | |
147 | (info))) | |
148 | ||
149 | /* Get the ARM elf linker hash table from a link_info structure. */ | |
150 | #define elf32_arm_hash_table(info) \ | |
151 | ((struct elf32_arm_link_hash_table *) ((info)->hash)) | |
152 | ||
153 | /* ARM ELF linker hash table */ | |
154 | struct elf32_arm_link_hash_table | |
155 | { | |
156 | /* The main hash table. */ | |
157 | struct elf_link_hash_table root; | |
158 | ||
159 | /* The size in bytes of the section containg the Thumb-to-ARM glue. */ | |
160 | long int thumb_glue_size; | |
161 | ||
162 | /* The size in bytes of the section containg the ARM-to-Thumb glue. */ | |
163 | long int arm_glue_size; | |
164 | ||
165 | /* An arbitary input BFD chosen to hold the glue sections. */ | |
166 | bfd * bfd_of_glue_owner; | |
ba96a88f NC |
167 | |
168 | /* A boolean indicating whether knowledge of the ARM's pipeline | |
169 | length should be applied by the linker. */ | |
170 | int no_pipeline_knowledge; | |
252b5132 RH |
171 | }; |
172 | ||
173 | ||
780a67af NC |
174 | /* Create an entry in an ARM ELF linker hash table. */ |
175 | ||
176 | static struct bfd_hash_entry * | |
177 | elf32_arm_link_hash_newfunc (entry, table, string) | |
178 | struct bfd_hash_entry * entry; | |
179 | struct bfd_hash_table * table; | |
180 | const char * string; | |
181 | { | |
182 | struct elf32_arm_link_hash_entry * ret = | |
183 | (struct elf32_arm_link_hash_entry *) entry; | |
184 | ||
185 | /* Allocate the structure if it has not already been allocated by a | |
186 | subclass. */ | |
187 | if (ret == (struct elf32_arm_link_hash_entry *) NULL) | |
188 | ret = ((struct elf32_arm_link_hash_entry *) | |
189 | bfd_hash_allocate (table, | |
190 | sizeof (struct elf32_arm_link_hash_entry))); | |
191 | if (ret == (struct elf32_arm_link_hash_entry *) NULL) | |
192 | return (struct bfd_hash_entry *) ret; | |
193 | ||
194 | /* Call the allocation method of the superclass. */ | |
195 | ret = ((struct elf32_arm_link_hash_entry *) | |
196 | _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, | |
197 | table, string)); | |
198 | if (ret != (struct elf32_arm_link_hash_entry *) NULL) | |
199 | ret->pcrel_relocs_copied = NULL; | |
200 | ||
201 | return (struct bfd_hash_entry *) ret; | |
202 | } | |
203 | ||
252b5132 RH |
204 | /* Create an ARM elf linker hash table */ |
205 | ||
206 | static struct bfd_link_hash_table * | |
207 | elf32_arm_link_hash_table_create (abfd) | |
208 | bfd *abfd; | |
209 | { | |
210 | struct elf32_arm_link_hash_table *ret; | |
211 | ||
212 | ret = ((struct elf32_arm_link_hash_table *) | |
213 | bfd_alloc (abfd, sizeof (struct elf32_arm_link_hash_table))); | |
214 | if (ret == (struct elf32_arm_link_hash_table *) NULL) | |
215 | return NULL; | |
216 | ||
217 | if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, | |
780a67af | 218 | elf32_arm_link_hash_newfunc)) |
252b5132 RH |
219 | { |
220 | bfd_release (abfd, ret); | |
221 | return NULL; | |
222 | } | |
223 | ||
224 | ret->thumb_glue_size = 0; | |
225 | ret->arm_glue_size = 0; | |
226 | ret->bfd_of_glue_owner = NULL; | |
ba96a88f | 227 | ret->no_pipeline_knowledge = 0; |
252b5132 RH |
228 | |
229 | return &ret->root.root; | |
230 | } | |
231 | ||
232 | static struct elf_link_hash_entry * | |
233 | find_thumb_glue (link_info, name, input_bfd) | |
234 | struct bfd_link_info *link_info; | |
235 | CONST char *name; | |
236 | bfd *input_bfd; | |
237 | { | |
238 | char *tmp_name; | |
239 | struct elf_link_hash_entry *hash; | |
240 | struct elf32_arm_link_hash_table *hash_table; | |
241 | ||
242 | /* We need a pointer to the armelf specific hash table. */ | |
243 | hash_table = elf32_arm_hash_table (link_info); | |
244 | ||
245 | ||
246 | tmp_name = ((char *) | |
247 | bfd_malloc (strlen (name) + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1)); | |
248 | ||
249 | BFD_ASSERT (tmp_name); | |
250 | ||
251 | sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name); | |
252 | ||
253 | hash = elf_link_hash_lookup | |
254 | (&(hash_table)->root, tmp_name, false, false, true); | |
255 | ||
256 | if (hash == NULL) | |
257 | /* xgettext:c-format */ | |
258 | _bfd_error_handler (_ ("%s: unable to find THUMB glue '%s' for `%s'"), | |
259 | bfd_get_filename (input_bfd), tmp_name, name); | |
260 | ||
261 | free (tmp_name); | |
262 | ||
263 | return hash; | |
264 | } | |
265 | ||
266 | static struct elf_link_hash_entry * | |
267 | find_arm_glue (link_info, name, input_bfd) | |
268 | struct bfd_link_info *link_info; | |
269 | CONST char *name; | |
270 | bfd *input_bfd; | |
271 | { | |
272 | char *tmp_name; | |
273 | struct elf_link_hash_entry *myh; | |
274 | struct elf32_arm_link_hash_table *hash_table; | |
275 | ||
276 | /* We need a pointer to the elfarm specific hash table. */ | |
277 | hash_table = elf32_arm_hash_table (link_info); | |
278 | ||
279 | tmp_name = ((char *) | |
280 | bfd_malloc (strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1)); | |
281 | ||
282 | BFD_ASSERT (tmp_name); | |
283 | ||
284 | sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name); | |
285 | ||
286 | myh = elf_link_hash_lookup | |
287 | (&(hash_table)->root, tmp_name, false, false, true); | |
288 | ||
289 | if (myh == NULL) | |
290 | /* xgettext:c-format */ | |
291 | _bfd_error_handler (_ ("%s: unable to find ARM glue '%s' for `%s'"), | |
292 | bfd_get_filename (input_bfd), tmp_name, name); | |
293 | ||
294 | free (tmp_name); | |
295 | ||
296 | return myh; | |
297 | } | |
298 | ||
299 | /* | |
300 | ARM->Thumb glue: | |
301 | ||
302 | .arm | |
303 | __func_from_arm: | |
304 | ldr r12, __func_addr | |
305 | bx r12 | |
306 | __func_addr: | |
307 | .word func @ behave as if you saw a ARM_32 reloc | |
308 | */ | |
309 | ||
310 | #define ARM2THUMB_GLUE_SIZE 12 | |
311 | static const insn32 a2t1_ldr_insn = 0xe59fc000; | |
312 | static const insn32 a2t2_bx_r12_insn = 0xe12fff1c; | |
313 | static const insn32 a2t3_func_addr_insn = 0x00000001; | |
314 | ||
315 | /* | |
316 | Thumb->ARM: Thumb->(non-interworking aware) ARM | |
317 | ||
318 | .thumb .thumb | |
319 | .align 2 .align 2 | |
320 | __func_from_thumb: __func_from_thumb: | |
321 | bx pc push {r6, lr} | |
322 | nop ldr r6, __func_addr | |
323 | .arm mov lr, pc | |
324 | __func_change_to_arm: bx r6 | |
325 | b func .arm | |
326 | __func_back_to_thumb: | |
327 | ldmia r13! {r6, lr} | |
328 | bx lr | |
329 | __func_addr: | |
f21f3fe0 | 330 | .word func |
252b5132 RH |
331 | */ |
332 | ||
333 | #define THUMB2ARM_GLUE_SIZE 8 | |
334 | static const insn16 t2a1_bx_pc_insn = 0x4778; | |
335 | static const insn16 t2a2_noop_insn = 0x46c0; | |
336 | static const insn32 t2a3_b_insn = 0xea000000; | |
337 | ||
338 | static const insn16 t2a1_push_insn = 0xb540; | |
339 | static const insn16 t2a2_ldr_insn = 0x4e03; | |
340 | static const insn16 t2a3_mov_insn = 0x46fe; | |
341 | static const insn16 t2a4_bx_insn = 0x4730; | |
342 | static const insn32 t2a5_pop_insn = 0xe8bd4040; | |
343 | static const insn32 t2a6_bx_insn = 0xe12fff1e; | |
344 | ||
345 | boolean | |
346 | bfd_elf32_arm_allocate_interworking_sections (info) | |
347 | struct bfd_link_info * info; | |
348 | { | |
349 | asection * s; | |
350 | bfd_byte * foo; | |
351 | struct elf32_arm_link_hash_table * globals; | |
352 | ||
353 | globals = elf32_arm_hash_table (info); | |
354 | ||
355 | BFD_ASSERT (globals != NULL); | |
356 | ||
357 | if (globals->arm_glue_size != 0) | |
358 | { | |
359 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
360 | ||
361 | s = bfd_get_section_by_name | |
362 | (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME); | |
363 | ||
364 | BFD_ASSERT (s != NULL); | |
365 | ||
366 | foo = (bfd_byte *) bfd_alloc | |
367 | (globals->bfd_of_glue_owner, globals->arm_glue_size); | |
368 | ||
369 | s->_raw_size = s->_cooked_size = globals->arm_glue_size; | |
370 | s->contents = foo; | |
371 | } | |
372 | ||
373 | if (globals->thumb_glue_size != 0) | |
374 | { | |
375 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
376 | ||
377 | s = bfd_get_section_by_name | |
378 | (globals->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME); | |
379 | ||
380 | BFD_ASSERT (s != NULL); | |
381 | ||
382 | foo = (bfd_byte *) bfd_alloc | |
383 | (globals->bfd_of_glue_owner, globals->thumb_glue_size); | |
384 | ||
385 | s->_raw_size = s->_cooked_size = globals->thumb_glue_size; | |
386 | s->contents = foo; | |
387 | } | |
388 | ||
389 | return true; | |
390 | } | |
391 | ||
392 | static void | |
393 | record_arm_to_thumb_glue (link_info, h) | |
394 | struct bfd_link_info * link_info; | |
395 | struct elf_link_hash_entry * h; | |
396 | { | |
397 | const char * name = h->root.root.string; | |
398 | register asection * s; | |
399 | char * tmp_name; | |
400 | struct elf_link_hash_entry * myh; | |
401 | struct elf32_arm_link_hash_table * globals; | |
402 | ||
403 | globals = elf32_arm_hash_table (link_info); | |
404 | ||
405 | BFD_ASSERT (globals != NULL); | |
406 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
407 | ||
408 | s = bfd_get_section_by_name | |
409 | (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME); | |
410 | ||
411 | ||
412 | BFD_ASSERT (s != NULL); | |
413 | ||
414 | tmp_name = ((char *) | |
415 | bfd_malloc (strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1)); | |
416 | ||
417 | BFD_ASSERT (tmp_name); | |
418 | ||
419 | sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name); | |
420 | ||
421 | myh = elf_link_hash_lookup | |
422 | (&(globals)->root, tmp_name, false, false, true); | |
423 | ||
424 | if (myh != NULL) | |
425 | { | |
426 | free (tmp_name); | |
427 | return; /* we've already seen this guy */ | |
428 | } | |
429 | ||
430 | /* The only trick here is using hash_table->arm_glue_size as the value. Even | |
431 | though the section isn't allocated yet, this is where we will be putting | |
432 | it. */ | |
433 | ||
434 | _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner, tmp_name, | |
435 | BSF_GLOBAL, | |
436 | s, globals->arm_glue_size + 1, | |
437 | NULL, true, false, | |
438 | (struct bfd_link_hash_entry **) &myh); | |
439 | ||
440 | free (tmp_name); | |
441 | ||
442 | globals->arm_glue_size += ARM2THUMB_GLUE_SIZE; | |
443 | ||
444 | return; | |
445 | } | |
446 | ||
447 | static void | |
448 | record_thumb_to_arm_glue (link_info, h) | |
449 | struct bfd_link_info *link_info; | |
450 | struct elf_link_hash_entry *h; | |
451 | { | |
452 | const char *name = h->root.root.string; | |
453 | register asection *s; | |
454 | char *tmp_name; | |
455 | struct elf_link_hash_entry *myh; | |
456 | struct elf32_arm_link_hash_table *hash_table; | |
457 | char bind; | |
458 | ||
459 | hash_table = elf32_arm_hash_table (link_info); | |
460 | ||
461 | BFD_ASSERT (hash_table != NULL); | |
462 | BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL); | |
463 | ||
464 | s = bfd_get_section_by_name | |
465 | (hash_table->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME); | |
466 | ||
467 | BFD_ASSERT (s != NULL); | |
468 | ||
469 | tmp_name = (char *) bfd_malloc (strlen (name) + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1); | |
470 | ||
471 | BFD_ASSERT (tmp_name); | |
472 | ||
473 | sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name); | |
474 | ||
475 | myh = elf_link_hash_lookup | |
476 | (&(hash_table)->root, tmp_name, false, false, true); | |
477 | ||
478 | if (myh != NULL) | |
479 | { | |
480 | free (tmp_name); | |
481 | return; /* we've already seen this guy */ | |
482 | } | |
483 | ||
484 | _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner, tmp_name, | |
485 | BSF_GLOBAL, s, hash_table->thumb_glue_size + 1, | |
486 | NULL, true, false, | |
487 | (struct bfd_link_hash_entry **) &myh); | |
488 | ||
489 | /* If we mark it 'thumb', the disassembler will do a better job. */ | |
490 | bind = ELF_ST_BIND (myh->type); | |
491 | myh->type = ELF_ST_INFO (bind, STT_ARM_TFUNC); | |
492 | ||
493 | free (tmp_name); | |
494 | ||
495 | /* Allocate another symbol to mark where we switch to arm mode. */ | |
496 | ||
497 | #define CHANGE_TO_ARM "__%s_change_to_arm" | |
498 | #define BACK_FROM_ARM "__%s_back_from_arm" | |
499 | ||
500 | tmp_name = (char *) bfd_malloc (strlen (name) + strlen (CHANGE_TO_ARM) + 1); | |
501 | ||
502 | BFD_ASSERT (tmp_name); | |
503 | ||
504 | sprintf (tmp_name, CHANGE_TO_ARM, name); | |
505 | ||
506 | myh = NULL; | |
507 | ||
508 | _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner, tmp_name, | |
509 | BSF_LOCAL, s, hash_table->thumb_glue_size + 4, | |
510 | NULL, true, false, | |
511 | (struct bfd_link_hash_entry **) &myh); | |
512 | ||
513 | free (tmp_name); | |
514 | ||
515 | hash_table->thumb_glue_size += THUMB2ARM_GLUE_SIZE; | |
516 | ||
517 | return; | |
518 | } | |
519 | ||
520 | /* Select a BFD to be used to hold the sections used by the glue code. | |
521 | This function is called from the linker scripts in ld/emultempl/ | |
522 | {armelf/pe}.em */ | |
523 | boolean | |
524 | bfd_elf32_arm_get_bfd_for_interworking (abfd, info) | |
525 | bfd *abfd; | |
526 | struct bfd_link_info *info; | |
527 | { | |
528 | struct elf32_arm_link_hash_table *globals; | |
529 | flagword flags; | |
530 | asection *sec; | |
531 | ||
532 | /* If we are only performing a partial link do not bother | |
533 | getting a bfd to hold the glue. */ | |
534 | if (info->relocateable) | |
535 | return true; | |
536 | ||
537 | globals = elf32_arm_hash_table (info); | |
538 | ||
539 | BFD_ASSERT (globals != NULL); | |
540 | ||
541 | if (globals->bfd_of_glue_owner != NULL) | |
542 | return true; | |
543 | ||
544 | sec = bfd_get_section_by_name (abfd, ARM2THUMB_GLUE_SECTION_NAME); | |
545 | ||
546 | if (sec == NULL) | |
547 | { | |
548 | flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY; | |
549 | ||
550 | sec = bfd_make_section (abfd, ARM2THUMB_GLUE_SECTION_NAME); | |
551 | ||
552 | if (sec == NULL | |
553 | || !bfd_set_section_flags (abfd, sec, flags) | |
554 | || !bfd_set_section_alignment (abfd, sec, 2)) | |
555 | return false; | |
556 | } | |
557 | ||
558 | sec = bfd_get_section_by_name (abfd, THUMB2ARM_GLUE_SECTION_NAME); | |
559 | ||
560 | if (sec == NULL) | |
561 | { | |
562 | flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY; | |
563 | ||
564 | sec = bfd_make_section (abfd, THUMB2ARM_GLUE_SECTION_NAME); | |
565 | ||
566 | if (sec == NULL | |
567 | || !bfd_set_section_flags (abfd, sec, flags) | |
568 | || !bfd_set_section_alignment (abfd, sec, 2)) | |
569 | return false; | |
570 | } | |
571 | ||
572 | /* Save the bfd for later use. */ | |
573 | globals->bfd_of_glue_owner = abfd; | |
574 | ||
575 | return true; | |
576 | } | |
577 | ||
578 | boolean | |
ba96a88f | 579 | bfd_elf32_arm_process_before_allocation (abfd, link_info, no_pipeline_knowledge) |
252b5132 RH |
580 | bfd *abfd; |
581 | struct bfd_link_info *link_info; | |
ba96a88f | 582 | int no_pipeline_knowledge; |
252b5132 RH |
583 | { |
584 | Elf_Internal_Shdr *symtab_hdr; | |
585 | Elf_Internal_Rela *free_relocs = NULL; | |
586 | Elf_Internal_Rela *irel, *irelend; | |
587 | bfd_byte *contents = NULL; | |
588 | bfd_byte *free_contents = NULL; | |
589 | Elf32_External_Sym *extsyms = NULL; | |
590 | Elf32_External_Sym *free_extsyms = NULL; | |
591 | ||
592 | asection *sec; | |
593 | struct elf32_arm_link_hash_table *globals; | |
594 | ||
595 | /* If we are only performing a partial link do not bother | |
596 | to construct any glue. */ | |
597 | if (link_info->relocateable) | |
598 | return true; | |
599 | ||
600 | /* Here we have a bfd that is to be included on the link. We have a hook | |
601 | to do reloc rummaging, before section sizes are nailed down. */ | |
602 | ||
603 | globals = elf32_arm_hash_table (link_info); | |
604 | ||
605 | BFD_ASSERT (globals != NULL); | |
606 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
607 | ||
ba96a88f | 608 | globals->no_pipeline_knowledge = no_pipeline_knowledge; |
f21f3fe0 | 609 | |
252b5132 RH |
610 | /* Rummage around all the relocs and map the glue vectors. */ |
611 | sec = abfd->sections; | |
612 | ||
613 | if (sec == NULL) | |
614 | return true; | |
615 | ||
616 | for (; sec != NULL; sec = sec->next) | |
617 | { | |
618 | if (sec->reloc_count == 0) | |
619 | continue; | |
620 | ||
621 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
622 | /* Load the relocs. */ | |
623 | ||
624 | irel = (_bfd_elf32_link_read_relocs (abfd, sec, (PTR) NULL, | |
625 | (Elf_Internal_Rela *) NULL, false)); | |
626 | ||
627 | BFD_ASSERT (irel != 0); | |
628 | ||
629 | irelend = irel + sec->reloc_count; | |
630 | for (; irel < irelend; irel++) | |
631 | { | |
632 | long r_type; | |
633 | unsigned long r_index; | |
252b5132 RH |
634 | |
635 | struct elf_link_hash_entry *h; | |
636 | ||
637 | r_type = ELF32_R_TYPE (irel->r_info); | |
638 | r_index = ELF32_R_SYM (irel->r_info); | |
639 | ||
640 | /* These are the only relocation types we care about */ | |
ba96a88f | 641 | if ( r_type != R_ARM_PC24 |
252b5132 RH |
642 | && r_type != R_ARM_THM_PC22) |
643 | continue; | |
644 | ||
645 | /* Get the section contents if we haven't done so already. */ | |
646 | if (contents == NULL) | |
647 | { | |
648 | /* Get cached copy if it exists. */ | |
649 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
650 | contents = elf_section_data (sec)->this_hdr.contents; | |
651 | else | |
652 | { | |
653 | /* Go get them off disk. */ | |
654 | contents = (bfd_byte *) bfd_malloc (sec->_raw_size); | |
655 | if (contents == NULL) | |
656 | goto error_return; | |
657 | free_contents = contents; | |
658 | ||
659 | if (!bfd_get_section_contents (abfd, sec, contents, | |
660 | (file_ptr) 0, sec->_raw_size)) | |
661 | goto error_return; | |
662 | } | |
663 | } | |
664 | ||
665 | /* Read this BFD's symbols if we haven't done so already. */ | |
666 | if (extsyms == NULL) | |
667 | { | |
668 | /* Get cached copy if it exists. */ | |
669 | if (symtab_hdr->contents != NULL) | |
670 | extsyms = (Elf32_External_Sym *) symtab_hdr->contents; | |
671 | else | |
672 | { | |
673 | /* Go get them off disk. */ | |
674 | extsyms = ((Elf32_External_Sym *) | |
675 | bfd_malloc (symtab_hdr->sh_size)); | |
676 | if (extsyms == NULL) | |
677 | goto error_return; | |
678 | free_extsyms = extsyms; | |
679 | if (bfd_seek (abfd, symtab_hdr->sh_offset, SEEK_SET) != 0 | |
680 | || (bfd_read (extsyms, 1, symtab_hdr->sh_size, abfd) | |
681 | != symtab_hdr->sh_size)) | |
682 | goto error_return; | |
683 | } | |
684 | } | |
685 | ||
686 | /* If the relocation is not against a symbol it cannot concern us. */ | |
687 | ||
688 | h = NULL; | |
689 | ||
690 | /* We don't care about local symbols */ | |
691 | if (r_index < symtab_hdr->sh_info) | |
692 | continue; | |
693 | ||
694 | /* This is an external symbol */ | |
695 | r_index -= symtab_hdr->sh_info; | |
696 | h = (struct elf_link_hash_entry *) | |
697 | elf_sym_hashes (abfd)[r_index]; | |
698 | ||
699 | /* If the relocation is against a static symbol it must be within | |
700 | the current section and so cannot be a cross ARM/Thumb relocation. */ | |
701 | if (h == NULL) | |
702 | continue; | |
703 | ||
704 | switch (r_type) | |
705 | { | |
706 | case R_ARM_PC24: | |
707 | /* This one is a call from arm code. We need to look up | |
708 | the target of the call. If it is a thumb target, we | |
709 | insert glue. */ | |
710 | ||
711 | if (ELF_ST_TYPE(h->type) == STT_ARM_TFUNC) | |
712 | record_arm_to_thumb_glue (link_info, h); | |
713 | break; | |
714 | ||
715 | case R_ARM_THM_PC22: | |
f21f3fe0 | 716 | /* This one is a call from thumb code. We look |
252b5132 | 717 | up the target of the call. If it is not a thumb |
bcbdc74c | 718 | target, we insert glue. */ |
252b5132 RH |
719 | |
720 | if (ELF_ST_TYPE (h->type) != STT_ARM_TFUNC) | |
721 | record_thumb_to_arm_glue (link_info, h); | |
722 | break; | |
723 | ||
724 | default: | |
725 | break; | |
726 | } | |
727 | } | |
728 | } | |
729 | ||
730 | return true; | |
731 | error_return: | |
732 | if (free_relocs != NULL) | |
733 | free (free_relocs); | |
734 | if (free_contents != NULL) | |
735 | free (free_contents); | |
736 | if (free_extsyms != NULL) | |
737 | free (free_extsyms); | |
738 | return false; | |
739 | ||
740 | } | |
741 | ||
742 | /* The thumb form of a long branch is a bit finicky, because the offset | |
743 | encoding is split over two fields, each in it's own instruction. They | |
f21f3fe0 | 744 | can occur in any order. So given a thumb form of long branch, and an |
252b5132 | 745 | offset, insert the offset into the thumb branch and return finished |
f21f3fe0 | 746 | instruction. |
252b5132 | 747 | |
f21f3fe0 | 748 | It takes two thumb instructions to encode the target address. Each has |
252b5132 | 749 | 11 bits to invest. The upper 11 bits are stored in one (identifed by |
f21f3fe0 UD |
750 | H-0.. see below), the lower 11 bits are stored in the other (identified |
751 | by H-1). | |
252b5132 | 752 | |
f21f3fe0 | 753 | Combine together and shifted left by 1 (it's a half word address) and |
252b5132 RH |
754 | there you have it. |
755 | ||
756 | Op: 1111 = F, | |
757 | H-0, upper address-0 = 000 | |
758 | Op: 1111 = F, | |
759 | H-1, lower address-0 = 800 | |
760 | ||
f21f3fe0 | 761 | They can be ordered either way, but the arm tools I've seen always put |
252b5132 RH |
762 | the lower one first. It probably doesn't matter. krk@cygnus.com |
763 | ||
764 | XXX: Actually the order does matter. The second instruction (H-1) | |
765 | moves the computed address into the PC, so it must be the second one | |
766 | in the sequence. The problem, however is that whilst little endian code | |
767 | stores the instructions in HI then LOW order, big endian code does the | |
768 | reverse. nickc@cygnus.com */ | |
769 | ||
770 | #define LOW_HI_ORDER 0xF800F000 | |
771 | #define HI_LOW_ORDER 0xF000F800 | |
772 | ||
773 | static insn32 | |
774 | insert_thumb_branch (br_insn, rel_off) | |
775 | insn32 br_insn; | |
776 | int rel_off; | |
777 | { | |
778 | unsigned int low_bits; | |
779 | unsigned int high_bits; | |
780 | ||
781 | ||
782 | BFD_ASSERT ((rel_off & 1) != 1); | |
783 | ||
784 | rel_off >>= 1; /* half word aligned address */ | |
785 | low_bits = rel_off & 0x000007FF; /* the bottom 11 bits */ | |
786 | high_bits = (rel_off >> 11) & 0x000007FF; /* the top 11 bits */ | |
787 | ||
788 | if ((br_insn & LOW_HI_ORDER) == LOW_HI_ORDER) | |
789 | br_insn = LOW_HI_ORDER | (low_bits << 16) | high_bits; | |
790 | else if ((br_insn & HI_LOW_ORDER) == HI_LOW_ORDER) | |
791 | br_insn = HI_LOW_ORDER | (high_bits << 16) | low_bits; | |
792 | else | |
793 | abort (); /* error - not a valid branch instruction form */ | |
794 | ||
795 | /* FIXME: abort is probably not the right call. krk@cygnus.com */ | |
796 | ||
797 | return br_insn; | |
798 | } | |
799 | ||
800 | /* Thumb code calling an ARM function */ | |
801 | static int | |
802 | elf32_thumb_to_arm_stub (info, name, input_bfd, output_bfd, input_section, | |
803 | hit_data, sym_sec, offset, addend, val) | |
bcbdc74c NC |
804 | struct bfd_link_info * info; |
805 | const char * name; | |
806 | bfd * input_bfd; | |
807 | bfd * output_bfd; | |
808 | asection * input_section; | |
809 | bfd_byte * hit_data; | |
810 | asection * sym_sec; | |
811 | bfd_vma offset; | |
812 | bfd_signed_vma addend; | |
813 | bfd_vma val; | |
252b5132 | 814 | { |
bcbdc74c | 815 | asection * s = 0; |
252b5132 RH |
816 | long int my_offset; |
817 | unsigned long int tmp; | |
818 | long int ret_offset; | |
bcbdc74c NC |
819 | struct elf_link_hash_entry * myh; |
820 | struct elf32_arm_link_hash_table * globals; | |
252b5132 RH |
821 | |
822 | myh = find_thumb_glue (info, name, input_bfd); | |
823 | if (myh == NULL) | |
824 | return false; | |
825 | ||
826 | globals = elf32_arm_hash_table (info); | |
827 | ||
828 | BFD_ASSERT (globals != NULL); | |
829 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
830 | ||
831 | my_offset = myh->root.u.def.value; | |
832 | ||
833 | s = bfd_get_section_by_name (globals->bfd_of_glue_owner, | |
834 | THUMB2ARM_GLUE_SECTION_NAME); | |
835 | ||
836 | BFD_ASSERT (s != NULL); | |
837 | BFD_ASSERT (s->contents != NULL); | |
838 | BFD_ASSERT (s->output_section != NULL); | |
839 | ||
840 | if ((my_offset & 0x01) == 0x01) | |
841 | { | |
842 | if (sym_sec != NULL | |
843 | && sym_sec->owner != NULL | |
844 | && !INTERWORK_FLAG (sym_sec->owner)) | |
845 | { | |
846 | _bfd_error_handler | |
847 | (_ ("%s(%s): warning: interworking not enabled."), | |
848 | bfd_get_filename (sym_sec->owner), name); | |
849 | _bfd_error_handler | |
850 | (_ (" first occurrence: %s: thumb call to arm"), | |
851 | bfd_get_filename (input_bfd)); | |
852 | ||
853 | return false; | |
854 | } | |
855 | ||
856 | --my_offset; | |
857 | myh->root.u.def.value = my_offset; | |
858 | ||
859 | bfd_put_16 (output_bfd, t2a1_bx_pc_insn, | |
860 | s->contents + my_offset); | |
861 | ||
862 | bfd_put_16 (output_bfd, t2a2_noop_insn, | |
863 | s->contents + my_offset + 2); | |
864 | ||
865 | ret_offset = | |
866 | ((bfd_signed_vma) val) /* Address of destination of the stub */ | |
867 | - ((bfd_signed_vma) | |
868 | (s->output_offset /* Offset from the start of the current section to the start of the stubs. */ | |
869 | + my_offset /* Offset of the start of this stub from the start of the stubs. */ | |
870 | + s->output_section->vma) /* Address of the start of the current section. */ | |
871 | + 4 /* The branch instruction is 4 bytes into the stub. */ | |
872 | + 8); /* ARM branches work from the pc of the instruction + 8. */ | |
873 | ||
874 | bfd_put_32 (output_bfd, | |
875 | t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF), | |
876 | s->contents + my_offset + 4); | |
877 | } | |
878 | ||
879 | BFD_ASSERT (my_offset <= globals->thumb_glue_size); | |
880 | ||
881 | /* Now go back and fix up the original BL insn to point | |
882 | to here. */ | |
883 | ret_offset = | |
884 | s->output_offset | |
885 | + my_offset | |
886 | - (input_section->output_offset | |
887 | + offset + addend) | |
888 | - 4; | |
889 | ||
890 | tmp = bfd_get_32 (input_bfd, hit_data | |
891 | - input_section->vma); | |
892 | ||
893 | bfd_put_32 (output_bfd, | |
894 | insert_thumb_branch (tmp, ret_offset), | |
895 | hit_data - input_section->vma); | |
896 | ||
897 | return true; | |
898 | } | |
899 | ||
900 | /* Arm code calling a Thumb function */ | |
901 | static int | |
902 | elf32_arm_to_thumb_stub (info, name, input_bfd, output_bfd, input_section, | |
903 | hit_data, sym_sec, offset, addend, val) | |
bcbdc74c NC |
904 | struct bfd_link_info * info; |
905 | const char * name; | |
906 | bfd * input_bfd; | |
907 | bfd * output_bfd; | |
908 | asection * input_section; | |
909 | bfd_byte * hit_data; | |
910 | asection * sym_sec; | |
911 | bfd_vma offset; | |
912 | bfd_signed_vma addend; | |
913 | bfd_vma val; | |
252b5132 RH |
914 | { |
915 | unsigned long int tmp; | |
916 | long int my_offset; | |
bcbdc74c | 917 | asection * s; |
252b5132 | 918 | long int ret_offset; |
bcbdc74c NC |
919 | struct elf_link_hash_entry * myh; |
920 | struct elf32_arm_link_hash_table * globals; | |
252b5132 RH |
921 | |
922 | myh = find_arm_glue (info, name, input_bfd); | |
923 | if (myh == NULL) | |
924 | return false; | |
925 | ||
926 | globals = elf32_arm_hash_table (info); | |
927 | ||
928 | BFD_ASSERT (globals != NULL); | |
929 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
930 | ||
931 | my_offset = myh->root.u.def.value; | |
932 | s = bfd_get_section_by_name (globals->bfd_of_glue_owner, | |
933 | ARM2THUMB_GLUE_SECTION_NAME); | |
934 | BFD_ASSERT (s != NULL); | |
935 | BFD_ASSERT (s->contents != NULL); | |
936 | BFD_ASSERT (s->output_section != NULL); | |
937 | ||
938 | if ((my_offset & 0x01) == 0x01) | |
939 | { | |
940 | if (sym_sec != NULL | |
941 | && sym_sec->owner != NULL | |
942 | && !INTERWORK_FLAG (sym_sec->owner)) | |
943 | { | |
944 | _bfd_error_handler | |
945 | (_ ("%s(%s): warning: interworking not enabled."), | |
946 | bfd_get_filename (sym_sec->owner), name); | |
947 | _bfd_error_handler | |
948 | (_ (" first occurrence: %s: arm call to thumb"), | |
949 | bfd_get_filename (input_bfd)); | |
950 | } | |
951 | --my_offset; | |
952 | myh->root.u.def.value = my_offset; | |
953 | ||
954 | bfd_put_32 (output_bfd, a2t1_ldr_insn, | |
955 | s->contents + my_offset); | |
956 | ||
957 | bfd_put_32 (output_bfd, a2t2_bx_r12_insn, | |
958 | s->contents + my_offset + 4); | |
959 | ||
960 | /* It's a thumb address. Add the low order bit. */ | |
961 | bfd_put_32 (output_bfd, val | a2t3_func_addr_insn, | |
962 | s->contents + my_offset + 8); | |
963 | } | |
964 | ||
965 | BFD_ASSERT (my_offset <= globals->arm_glue_size); | |
966 | ||
967 | tmp = bfd_get_32 (input_bfd, hit_data); | |
968 | tmp = tmp & 0xFF000000; | |
969 | ||
970 | /* Somehow these are both 4 too far, so subtract 8. */ | |
971 | ret_offset = s->output_offset | |
972 | + my_offset | |
973 | + s->output_section->vma | |
974 | - (input_section->output_offset | |
975 | + input_section->output_section->vma | |
976 | + offset + addend) | |
977 | - 8; | |
bcbdc74c | 978 | |
252b5132 RH |
979 | tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF); |
980 | ||
981 | bfd_put_32 (output_bfd, tmp, hit_data | |
982 | - input_section->vma); | |
983 | ||
252b5132 RH |
984 | return true; |
985 | } | |
986 | ||
987 | /* Perform a relocation as part of a final link. */ | |
988 | static bfd_reloc_status_type | |
989 | elf32_arm_final_link_relocate (howto, input_bfd, output_bfd, | |
990 | input_section, contents, rel, value, | |
780a67af | 991 | info, sym_sec, sym_name, sym_flags, h) |
252b5132 RH |
992 | reloc_howto_type * howto; |
993 | bfd * input_bfd; | |
994 | bfd * output_bfd; | |
995 | asection * input_section; | |
996 | bfd_byte * contents; | |
997 | Elf_Internal_Rela * rel; | |
998 | bfd_vma value; | |
999 | struct bfd_link_info * info; | |
1000 | asection * sym_sec; | |
1001 | const char * sym_name; | |
1002 | unsigned char sym_flags; | |
780a67af | 1003 | struct elf_link_hash_entry * h; |
252b5132 RH |
1004 | { |
1005 | unsigned long r_type = howto->type; | |
1006 | unsigned long r_symndx; | |
1007 | bfd_byte * hit_data = contents + rel->r_offset; | |
1008 | bfd * dynobj = NULL; | |
1009 | Elf_Internal_Shdr * symtab_hdr; | |
1010 | struct elf_link_hash_entry ** sym_hashes; | |
1011 | bfd_vma * local_got_offsets; | |
1012 | asection * sgot = NULL; | |
1013 | asection * splt = NULL; | |
1014 | asection * sreloc = NULL; | |
252b5132 | 1015 | bfd_vma addend; |
ba96a88f NC |
1016 | bfd_signed_vma signed_addend; |
1017 | struct elf32_arm_link_hash_table * globals; | |
f21f3fe0 | 1018 | |
ba96a88f | 1019 | globals = elf32_arm_hash_table (info); |
f21f3fe0 | 1020 | |
252b5132 RH |
1021 | dynobj = elf_hash_table (info)->dynobj; |
1022 | if (dynobj) | |
1023 | { | |
1024 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
1025 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
1026 | } | |
1027 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; | |
1028 | sym_hashes = elf_sym_hashes (input_bfd); | |
1029 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
1030 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1031 | ||
1032 | #ifdef USE_REL | |
ba96a88f NC |
1033 | addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask; |
1034 | ||
1035 | if (addend & ((howto->src_mask + 1) >> 1)) | |
1036 | { | |
1037 | signed_addend = -1; | |
1038 | signed_addend &= ~ howto->src_mask; | |
1039 | signed_addend |= addend; | |
1040 | } | |
1041 | else | |
1042 | signed_addend = addend; | |
252b5132 | 1043 | #else |
ba96a88f | 1044 | addend = signed_addend = rel->r_addend; |
252b5132 | 1045 | #endif |
f21f3fe0 | 1046 | |
252b5132 RH |
1047 | switch (r_type) |
1048 | { | |
1049 | case R_ARM_NONE: | |
1050 | return bfd_reloc_ok; | |
1051 | ||
1052 | case R_ARM_PC24: | |
1053 | case R_ARM_ABS32: | |
1054 | case R_ARM_REL32: | |
1055 | /* When generating a shared object, these relocations are copied | |
1056 | into the output file to be resolved at run time. */ | |
f21f3fe0 | 1057 | |
252b5132 RH |
1058 | if (info->shared |
1059 | && (r_type != R_ARM_PC24 | |
1060 | || (h != NULL | |
1061 | && h->dynindx != -1 | |
1062 | && (! info->symbolic | |
1063 | || (h->elf_link_hash_flags | |
1064 | & ELF_LINK_HASH_DEF_REGULAR) == 0)))) | |
1065 | { | |
1066 | Elf_Internal_Rel outrel; | |
1067 | boolean skip, relocate; | |
f21f3fe0 | 1068 | |
252b5132 RH |
1069 | if (sreloc == NULL) |
1070 | { | |
1071 | const char * name; | |
f21f3fe0 | 1072 | |
252b5132 RH |
1073 | name = (bfd_elf_string_from_elf_section |
1074 | (input_bfd, | |
1075 | elf_elfheader (input_bfd)->e_shstrndx, | |
1076 | elf_section_data (input_section)->rel_hdr.sh_name)); | |
1077 | if (name == NULL) | |
1078 | return bfd_reloc_notsupported; | |
f21f3fe0 | 1079 | |
252b5132 RH |
1080 | BFD_ASSERT (strncmp (name, ".rel", 4) == 0 |
1081 | && strcmp (bfd_get_section_name (input_bfd, | |
1082 | input_section), | |
1083 | name + 4) == 0); | |
f21f3fe0 | 1084 | |
252b5132 RH |
1085 | sreloc = bfd_get_section_by_name (dynobj, name); |
1086 | BFD_ASSERT (sreloc != NULL); | |
1087 | } | |
f21f3fe0 | 1088 | |
252b5132 | 1089 | skip = false; |
f21f3fe0 | 1090 | |
252b5132 RH |
1091 | if (elf_section_data (input_section)->stab_info == NULL) |
1092 | outrel.r_offset = rel->r_offset; | |
1093 | else | |
1094 | { | |
1095 | bfd_vma off; | |
f21f3fe0 | 1096 | |
252b5132 RH |
1097 | off = (_bfd_stab_section_offset |
1098 | (output_bfd, &elf_hash_table (info)->stab_info, | |
1099 | input_section, | |
1100 | & elf_section_data (input_section)->stab_info, | |
1101 | rel->r_offset)); | |
1102 | if (off == (bfd_vma) -1) | |
1103 | skip = true; | |
1104 | outrel.r_offset = off; | |
1105 | } | |
f21f3fe0 | 1106 | |
252b5132 RH |
1107 | outrel.r_offset += (input_section->output_section->vma |
1108 | + input_section->output_offset); | |
f21f3fe0 | 1109 | |
252b5132 RH |
1110 | if (skip) |
1111 | { | |
1112 | memset (&outrel, 0, sizeof outrel); | |
1113 | relocate = false; | |
1114 | } | |
1115 | else if (r_type == R_ARM_PC24) | |
1116 | { | |
1117 | BFD_ASSERT (h != NULL && h->dynindx != -1); | |
1118 | if ((input_section->flags & SEC_ALLOC) != 0) | |
1119 | relocate = false; | |
1120 | else | |
1121 | relocate = true; | |
1122 | outrel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_PC24); | |
1123 | } | |
1124 | else | |
1125 | { | |
1126 | if (h == NULL | |
1127 | || ((info->symbolic || h->dynindx == -1) | |
1128 | && (h->elf_link_hash_flags | |
1129 | & ELF_LINK_HASH_DEF_REGULAR) != 0)) | |
1130 | { | |
1131 | relocate = true; | |
1132 | outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE); | |
1133 | } | |
1134 | else | |
1135 | { | |
1136 | BFD_ASSERT (h->dynindx != -1); | |
1137 | if ((input_section->flags & SEC_ALLOC) != 0) | |
1138 | relocate = false; | |
1139 | else | |
1140 | relocate = true; | |
1141 | outrel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_ABS32); | |
1142 | } | |
1143 | } | |
f21f3fe0 | 1144 | |
252b5132 RH |
1145 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, |
1146 | (((Elf32_External_Rel *) | |
1147 | sreloc->contents) | |
1148 | + sreloc->reloc_count)); | |
1149 | ++sreloc->reloc_count; | |
dece4658 | 1150 | |
f21f3fe0 | 1151 | /* If this reloc is against an external symbol, we do not want to |
252b5132 RH |
1152 | fiddle with the addend. Otherwise, we need to include the symbol |
1153 | value so that it becomes an addend for the dynamic reloc. */ | |
1154 | if (! relocate) | |
1155 | return bfd_reloc_ok; | |
f21f3fe0 | 1156 | |
dece4658 | 1157 | |
f21f3fe0 | 1158 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
252b5132 RH |
1159 | contents, rel->r_offset, value, |
1160 | (bfd_vma) 0); | |
1161 | } | |
1162 | else switch (r_type) | |
1163 | { | |
1164 | case R_ARM_PC24: | |
1165 | /* Arm B/BL instruction */ | |
f21f3fe0 | 1166 | |
252b5132 RH |
1167 | /* Check for arm calling thumb function. */ |
1168 | if (sym_flags == STT_ARM_TFUNC) | |
1169 | { | |
1170 | elf32_arm_to_thumb_stub (info, sym_name, input_bfd, output_bfd, | |
bcbdc74c NC |
1171 | input_section, hit_data, sym_sec, rel->r_offset, |
1172 | signed_addend, value); | |
252b5132 RH |
1173 | return bfd_reloc_ok; |
1174 | } | |
ba96a88f NC |
1175 | |
1176 | if ( strcmp (bfd_get_target (input_bfd), "elf32-littlearm-oabi") == 0 | |
1177 | || strcmp (bfd_get_target (input_bfd), "elf32-bigarm-oabi") == 0) | |
1178 | { | |
1179 | /* The old way of doing things. Trearing the addend as a | |
1180 | byte sized field and adding in the pipeline offset. */ | |
f21f3fe0 | 1181 | |
ba96a88f NC |
1182 | value -= (input_section->output_section->vma |
1183 | + input_section->output_offset); | |
1184 | value -= rel->r_offset; | |
1185 | value += addend; | |
f21f3fe0 | 1186 | |
ba96a88f NC |
1187 | if (! globals->no_pipeline_knowledge) |
1188 | value -= 8; | |
1189 | } | |
1190 | else | |
1191 | { | |
1192 | /* The ARM ELF ABI says that this reloc is computed as: S - P + A | |
1193 | where: | |
1194 | S is the address of the symbol in the relocation. | |
1195 | P is address of the instruction being relocated. | |
1196 | A is the addend (extracted from the instruction) in bytes. | |
f21f3fe0 | 1197 | |
ba96a88f NC |
1198 | S is held in 'value'. |
1199 | P is the base address of the section containing the instruction | |
1200 | plus the offset of the reloc into that section, ie: | |
1201 | (input_section->output_section->vma + | |
1202 | input_section->output_offset + | |
1203 | rel->r_offset). | |
1204 | A is the addend, converted into bytes, ie: | |
1205 | (signed_addend * 4) | |
1206 | ||
1207 | Note: None of these operations have knowledge of the pipeline | |
1208 | size of the processor, thus it is up to the assembler to encode | |
1209 | this information into the addend. */ | |
1210 | ||
1211 | value -= (input_section->output_section->vma | |
1212 | + input_section->output_offset); | |
1213 | value -= rel->r_offset; | |
1214 | value += (signed_addend << howto->size); | |
f21f3fe0 | 1215 | |
ba96a88f NC |
1216 | /* Previous versions of this code also used to add in the pipeline |
1217 | offset here. This is wrong because the linker is not supposed | |
1218 | to know about such things, and one day it might change. In order | |
1219 | to support old binaries that need the old behaviour however, so | |
1220 | we attempt to detect which ABI was used to create the reloc. */ | |
1221 | if (! globals->no_pipeline_knowledge) | |
f21f3fe0 | 1222 | { |
ba96a88f | 1223 | Elf_Internal_Ehdr * i_ehdrp; /* Elf file header, internal form */ |
f21f3fe0 | 1224 | |
ba96a88f | 1225 | i_ehdrp = elf_elfheader (input_bfd); |
f21f3fe0 | 1226 | |
ba96a88f NC |
1227 | if (i_ehdrp->e_ident[EI_OSABI] == 0) |
1228 | value -= 8; | |
1229 | } | |
1230 | } | |
23080146 NC |
1231 | |
1232 | /* Perform a signed range check. */ | |
1233 | signed_addend = value; | |
1234 | signed_addend >>= howto->rightshift; | |
1235 | if (signed_addend > ((bfd_signed_vma)(howto->dst_mask >> 1)) | |
1236 | || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1))) | |
1237 | return bfd_reloc_overflow; | |
dece4658 | 1238 | |
23080146 NC |
1239 | value = (signed_addend & howto->dst_mask) |
1240 | | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask)); | |
252b5132 | 1241 | break; |
f21f3fe0 | 1242 | |
252b5132 RH |
1243 | case R_ARM_ABS32: |
1244 | value += addend; | |
1245 | if (sym_flags == STT_ARM_TFUNC) | |
1246 | value |= 1; | |
1247 | break; | |
f21f3fe0 | 1248 | |
252b5132 RH |
1249 | case R_ARM_REL32: |
1250 | value -= (input_section->output_section->vma | |
1251 | + input_section->output_offset); | |
1252 | value += addend; | |
1253 | break; | |
1254 | } | |
f21f3fe0 | 1255 | |
252b5132 RH |
1256 | bfd_put_32 (input_bfd, value, hit_data); |
1257 | return bfd_reloc_ok; | |
1258 | ||
1259 | case R_ARM_ABS8: | |
1260 | value += addend; | |
1261 | if ((long) value > 0x7f || (long) value < -0x80) | |
1262 | return bfd_reloc_overflow; | |
1263 | ||
1264 | bfd_put_8 (input_bfd, value, hit_data); | |
1265 | return bfd_reloc_ok; | |
1266 | ||
1267 | case R_ARM_ABS16: | |
1268 | value += addend; | |
1269 | ||
1270 | if ((long) value > 0x7fff || (long) value < -0x8000) | |
1271 | return bfd_reloc_overflow; | |
1272 | ||
1273 | bfd_put_16 (input_bfd, value, hit_data); | |
1274 | return bfd_reloc_ok; | |
1275 | ||
1276 | case R_ARM_ABS12: | |
1277 | /* Support ldr and str instruction for the arm */ | |
1278 | /* Also thumb b (unconditional branch). ??? Really? */ | |
1279 | value += addend; | |
1280 | ||
1281 | if ((long) value > 0x7ff || (long) value < -0x800) | |
1282 | return bfd_reloc_overflow; | |
1283 | ||
1284 | value |= (bfd_get_32 (input_bfd, hit_data) & 0xfffff000); | |
1285 | bfd_put_32 (input_bfd, value, hit_data); | |
1286 | return bfd_reloc_ok; | |
1287 | ||
1288 | case R_ARM_THM_ABS5: | |
1289 | /* Support ldr and str instructions for the thumb. */ | |
1290 | #ifdef USE_REL | |
1291 | /* Need to refetch addend. */ | |
1292 | addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask; | |
1293 | /* ??? Need to determine shift amount from operand size. */ | |
1294 | addend >>= howto->rightshift; | |
1295 | #endif | |
1296 | value += addend; | |
1297 | ||
1298 | /* ??? Isn't value unsigned? */ | |
1299 | if ((long) value > 0x1f || (long) value < -0x10) | |
1300 | return bfd_reloc_overflow; | |
1301 | ||
1302 | /* ??? Value needs to be properly shifted into place first. */ | |
1303 | value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f; | |
1304 | bfd_put_16 (input_bfd, value, hit_data); | |
1305 | return bfd_reloc_ok; | |
1306 | ||
1307 | case R_ARM_THM_PC22: | |
1308 | /* Thumb BL (branch long instruction). */ | |
1309 | { | |
ba96a88f NC |
1310 | bfd_vma relocation; |
1311 | boolean overflow = false; | |
1312 | bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data); | |
1313 | bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2); | |
252b5132 | 1314 | bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1; |
ba96a88f NC |
1315 | bfd_signed_vma reloc_signed_min = ~ reloc_signed_max; |
1316 | bfd_vma check; | |
252b5132 | 1317 | bfd_signed_vma signed_check; |
252b5132 RH |
1318 | |
1319 | #ifdef USE_REL | |
1320 | /* Need to refetch the addend and squish the two 11 bit pieces | |
1321 | together. */ | |
1322 | { | |
ba96a88f NC |
1323 | bfd_vma upper = upper_insn & 0x7ff; |
1324 | bfd_vma lower = lower_insn & 0x7ff; | |
252b5132 RH |
1325 | upper = (upper ^ 0x400) - 0x400; /* sign extend */ |
1326 | addend = (upper << 12) | (lower << 1); | |
ba96a88f | 1327 | signed_addend = addend; |
252b5132 RH |
1328 | } |
1329 | #endif | |
1330 | ||
bcbdc74c NC |
1331 | /* If it is not a call to thumb, assume call to arm. |
1332 | If it is a call relative to a section name, then it is not a | |
1333 | function call at all, but rather a long jump. */ | |
1334 | if (sym_flags != STT_ARM_TFUNC && sym_flags != STT_SECTION) | |
252b5132 RH |
1335 | { |
1336 | if (elf32_thumb_to_arm_stub | |
1337 | (info, sym_name, input_bfd, output_bfd, input_section, | |
bcbdc74c | 1338 | hit_data, sym_sec, rel->r_offset, signed_addend, value)) |
252b5132 RH |
1339 | return bfd_reloc_ok; |
1340 | else | |
1341 | return bfd_reloc_dangerous; | |
1342 | } | |
f21f3fe0 | 1343 | |
ba96a88f | 1344 | relocation = value + signed_addend; |
f21f3fe0 | 1345 | |
252b5132 | 1346 | relocation -= (input_section->output_section->vma |
ba96a88f NC |
1347 | + input_section->output_offset |
1348 | + rel->r_offset); | |
dece4658 | 1349 | |
ba96a88f NC |
1350 | if (! globals->no_pipeline_knowledge) |
1351 | { | |
1352 | Elf_Internal_Ehdr * i_ehdrp; /* Elf file header, internal form */ | |
dece4658 | 1353 | |
ba96a88f | 1354 | i_ehdrp = elf_elfheader (input_bfd); |
f21f3fe0 | 1355 | |
ba96a88f NC |
1356 | /* Previous versions of this code also used to add in the pipline |
1357 | offset here. This is wrong because the linker is not supposed | |
1358 | to know about such things, and one day it might change. In order | |
1359 | to support old binaries that need the old behaviour however, so | |
1360 | we attempt to detect which ABI was used to create the reloc. */ | |
1361 | if ( strcmp (bfd_get_target (input_bfd), "elf32-littlearm-oabi") == 0 | |
1362 | || strcmp (bfd_get_target (input_bfd), "elf32-bigarm-oabi") == 0 | |
1363 | || i_ehdrp->e_ident[EI_OSABI] == 0) | |
1364 | relocation += 4; | |
1365 | } | |
f21f3fe0 | 1366 | |
252b5132 RH |
1367 | check = relocation >> howto->rightshift; |
1368 | ||
1369 | /* If this is a signed value, the rightshift just dropped | |
1370 | leading 1 bits (assuming twos complement). */ | |
1371 | if ((bfd_signed_vma) relocation >= 0) | |
1372 | signed_check = check; | |
1373 | else | |
1374 | signed_check = check | ~((bfd_vma) -1 >> howto->rightshift); | |
1375 | ||
252b5132 | 1376 | /* Assumes two's complement. */ |
ba96a88f | 1377 | if (signed_check > reloc_signed_max || signed_check < reloc_signed_min) |
252b5132 RH |
1378 | overflow = true; |
1379 | ||
1380 | /* Put RELOCATION back into the insn. */ | |
1381 | upper_insn = (upper_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 12) & 0x7ff); | |
1382 | lower_insn = (lower_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 1) & 0x7ff); | |
1383 | ||
1384 | /* Put the relocated value back in the object file: */ | |
1385 | bfd_put_16 (input_bfd, upper_insn, hit_data); | |
1386 | bfd_put_16 (input_bfd, lower_insn, hit_data + 2); | |
1387 | ||
1388 | return (overflow ? bfd_reloc_overflow : bfd_reloc_ok); | |
1389 | } | |
1390 | break; | |
1391 | ||
1392 | case R_ARM_GNU_VTINHERIT: | |
1393 | case R_ARM_GNU_VTENTRY: | |
1394 | return bfd_reloc_ok; | |
1395 | ||
1396 | case R_ARM_COPY: | |
1397 | return bfd_reloc_notsupported; | |
1398 | ||
1399 | case R_ARM_GLOB_DAT: | |
1400 | return bfd_reloc_notsupported; | |
1401 | ||
1402 | case R_ARM_JUMP_SLOT: | |
1403 | return bfd_reloc_notsupported; | |
1404 | ||
1405 | case R_ARM_RELATIVE: | |
1406 | return bfd_reloc_notsupported; | |
1407 | ||
1408 | case R_ARM_GOTOFF: | |
1409 | /* Relocation is relative to the start of the | |
1410 | global offset table. */ | |
1411 | ||
1412 | BFD_ASSERT (sgot != NULL); | |
1413 | if (sgot == NULL) | |
1414 | return bfd_reloc_notsupported; | |
dece4658 | 1415 | |
252b5132 RH |
1416 | /* Note that sgot->output_offset is not involved in this |
1417 | calculation. We always want the start of .got. If we | |
1418 | define _GLOBAL_OFFSET_TABLE in a different way, as is | |
1419 | permitted by the ABI, we might have to change this | |
1420 | calculation. */ | |
f21f3fe0 | 1421 | |
252b5132 | 1422 | value -= sgot->output_section->vma; |
f21f3fe0 | 1423 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
252b5132 RH |
1424 | contents, rel->r_offset, value, |
1425 | (bfd_vma) 0); | |
1426 | ||
1427 | case R_ARM_GOTPC: | |
1428 | /* Use global offset table as symbol value. */ | |
1429 | ||
1430 | BFD_ASSERT (sgot != NULL); | |
f21f3fe0 | 1431 | |
252b5132 RH |
1432 | if (sgot == NULL) |
1433 | return bfd_reloc_notsupported; | |
1434 | ||
1435 | value = sgot->output_section->vma; | |
f21f3fe0 | 1436 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
252b5132 RH |
1437 | contents, rel->r_offset, value, |
1438 | (bfd_vma) 0); | |
f21f3fe0 | 1439 | |
252b5132 RH |
1440 | case R_ARM_GOT32: |
1441 | /* Relocation is to the entry for this symbol in the | |
1442 | global offset table. */ | |
1443 | if (sgot == NULL) | |
1444 | return bfd_reloc_notsupported; | |
f21f3fe0 | 1445 | |
252b5132 RH |
1446 | if (h != NULL) |
1447 | { | |
1448 | bfd_vma off; | |
f21f3fe0 | 1449 | |
252b5132 RH |
1450 | off = h->got.offset; |
1451 | BFD_ASSERT (off != (bfd_vma) -1); | |
f21f3fe0 | 1452 | |
252b5132 RH |
1453 | if (!elf_hash_table (info)->dynamic_sections_created || |
1454 | (info->shared && (info->symbolic || h->dynindx == -1) | |
1455 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))) | |
1456 | { | |
1457 | /* This is actually a static link, or it is a -Bsymbolic link | |
1458 | and the symbol is defined locally. We must initialize this | |
1459 | entry in the global offset table. Since the offset must | |
1460 | always be a multiple of 4, we use the least significant bit | |
1461 | to record whether we have initialized it already. | |
f21f3fe0 | 1462 | |
252b5132 | 1463 | When doing a dynamic link, we create a .rel.got relocation |
f21f3fe0 | 1464 | entry to initialize the value. This is done in the |
252b5132 | 1465 | finish_dynamic_symbol routine. */ |
f21f3fe0 | 1466 | |
252b5132 RH |
1467 | if ((off & 1) != 0) |
1468 | off &= ~1; | |
1469 | else | |
1470 | { | |
1471 | bfd_put_32 (output_bfd, value, sgot->contents + off); | |
1472 | h->got.offset |= 1; | |
1473 | } | |
1474 | } | |
f21f3fe0 | 1475 | |
252b5132 RH |
1476 | value = sgot->output_offset + off; |
1477 | } | |
1478 | else | |
1479 | { | |
1480 | bfd_vma off; | |
f21f3fe0 | 1481 | |
252b5132 RH |
1482 | BFD_ASSERT (local_got_offsets != NULL && |
1483 | local_got_offsets[r_symndx] != (bfd_vma) -1); | |
f21f3fe0 | 1484 | |
252b5132 | 1485 | off = local_got_offsets[r_symndx]; |
f21f3fe0 | 1486 | |
252b5132 RH |
1487 | /* The offset must always be a multiple of 4. We use the |
1488 | least significant bit to record whether we have already | |
1489 | generated the necessary reloc. */ | |
1490 | if ((off & 1) != 0) | |
1491 | off &= ~1; | |
1492 | else | |
1493 | { | |
1494 | bfd_put_32 (output_bfd, value, sgot->contents + off); | |
f21f3fe0 | 1495 | |
252b5132 RH |
1496 | if (info->shared) |
1497 | { | |
1498 | asection * srelgot; | |
1499 | Elf_Internal_Rel outrel; | |
f21f3fe0 | 1500 | |
252b5132 RH |
1501 | srelgot = bfd_get_section_by_name (dynobj, ".rel.got"); |
1502 | BFD_ASSERT (srelgot != NULL); | |
f21f3fe0 | 1503 | |
252b5132 | 1504 | outrel.r_offset = (sgot->output_section->vma |
f21f3fe0 | 1505 | + sgot->output_offset |
252b5132 RH |
1506 | + off); |
1507 | outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE); | |
1508 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, | |
1509 | (((Elf32_External_Rel *) | |
1510 | srelgot->contents) | |
1511 | + srelgot->reloc_count)); | |
1512 | ++srelgot->reloc_count; | |
1513 | } | |
f21f3fe0 | 1514 | |
252b5132 RH |
1515 | local_got_offsets[r_symndx] |= 1; |
1516 | } | |
f21f3fe0 | 1517 | |
252b5132 RH |
1518 | value = sgot->output_offset + off; |
1519 | } | |
dece4658 | 1520 | |
f21f3fe0 | 1521 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
252b5132 RH |
1522 | contents, rel->r_offset, value, |
1523 | (bfd_vma) 0); | |
f21f3fe0 | 1524 | |
252b5132 RH |
1525 | case R_ARM_PLT32: |
1526 | /* Relocation is to the entry for this symbol in the | |
1527 | procedure linkage table. */ | |
1528 | ||
1529 | /* Resolve a PLT32 reloc against a local symbol directly, | |
1530 | without using the procedure linkage table. */ | |
1531 | if (h == NULL) | |
1532 | return _bfd_final_link_relocate (howto, input_bfd, input_section, | |
1533 | contents, rel->r_offset, value, | |
1534 | (bfd_vma) 0); | |
1535 | ||
1536 | if (h->plt.offset == (bfd_vma) -1) | |
1537 | /* We didn't make a PLT entry for this symbol. This | |
1538 | happens when statically linking PIC code, or when | |
1539 | using -Bsymbolic. */ | |
1540 | return _bfd_final_link_relocate (howto, input_bfd, input_section, | |
1541 | contents, rel->r_offset, value, | |
1542 | (bfd_vma) 0); | |
1543 | ||
1544 | BFD_ASSERT(splt != NULL); | |
1545 | if (splt == NULL) | |
1546 | return bfd_reloc_notsupported; | |
1547 | ||
1548 | value = (splt->output_section->vma | |
1549 | + splt->output_offset | |
1550 | + h->plt.offset); | |
1551 | return _bfd_final_link_relocate (howto, input_bfd, input_section, | |
1552 | contents, rel->r_offset, value, | |
1553 | (bfd_vma) 0); | |
f21f3fe0 | 1554 | |
252b5132 RH |
1555 | case R_ARM_SBREL32: |
1556 | return bfd_reloc_notsupported; | |
1557 | ||
1558 | case R_ARM_AMP_VCALL9: | |
1559 | return bfd_reloc_notsupported; | |
1560 | ||
1561 | case R_ARM_RSBREL32: | |
1562 | return bfd_reloc_notsupported; | |
1563 | ||
1564 | case R_ARM_THM_RPC22: | |
1565 | return bfd_reloc_notsupported; | |
1566 | ||
1567 | case R_ARM_RREL32: | |
1568 | return bfd_reloc_notsupported; | |
1569 | ||
1570 | case R_ARM_RABS32: | |
1571 | return bfd_reloc_notsupported; | |
1572 | ||
1573 | case R_ARM_RPC24: | |
1574 | return bfd_reloc_notsupported; | |
1575 | ||
1576 | case R_ARM_RBASE: | |
1577 | return bfd_reloc_notsupported; | |
1578 | ||
1579 | default: | |
1580 | return bfd_reloc_notsupported; | |
1581 | } | |
1582 | } | |
1583 | ||
98c1d4aa NC |
1584 | #ifdef USE_REL |
1585 | /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */ | |
1586 | static void | |
1587 | arm_add_to_rel (abfd, address, howto, increment) | |
1588 | bfd * abfd; | |
1589 | bfd_vma address; | |
1590 | reloc_howto_type * howto; | |
1591 | bfd_signed_vma increment; | |
1592 | { | |
1593 | bfd_vma contents; | |
1594 | bfd_signed_vma addend; | |
1595 | ||
1596 | contents = bfd_get_32 (abfd, address); | |
1597 | ||
1598 | /* Get the (signed) value from the instruction. */ | |
1599 | addend = contents & howto->src_mask; | |
1600 | if (addend & ((howto->src_mask + 1) >> 1)) | |
1601 | { | |
1602 | bfd_signed_vma mask; | |
1603 | ||
1604 | mask = -1; | |
1605 | mask &= ~ howto->src_mask; | |
1606 | addend |= mask; | |
1607 | } | |
1608 | ||
1609 | /* Add in the increment, (which is a byte value). */ | |
ddda4409 NC |
1610 | switch (howto->type) |
1611 | { | |
1612 | case R_ARM_THM_PC22: | |
1613 | default: | |
1614 | addend += increment; | |
1615 | break; | |
98c1d4aa | 1616 | |
ddda4409 NC |
1617 | case R_ARM_PC24: |
1618 | addend <<= howto->size; | |
1619 | addend += increment; | |
1620 | ||
1621 | /* Should we check for overflow here ? */ | |
98c1d4aa | 1622 | |
ddda4409 NC |
1623 | /* Drop any undesired bits. */ |
1624 | addend >>= howto->rightshift; | |
1625 | break; | |
1626 | } | |
98c1d4aa NC |
1627 | |
1628 | contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask); | |
1629 | ||
1630 | bfd_put_32 (abfd, contents, address); | |
1631 | } | |
1632 | #endif /* USE_REL */ | |
252b5132 RH |
1633 | |
1634 | /* Relocate an ARM ELF section. */ | |
1635 | static boolean | |
1636 | elf32_arm_relocate_section (output_bfd, info, input_bfd, input_section, | |
1637 | contents, relocs, local_syms, local_sections) | |
1638 | bfd * output_bfd; | |
1639 | struct bfd_link_info * info; | |
1640 | bfd * input_bfd; | |
1641 | asection * input_section; | |
1642 | bfd_byte * contents; | |
1643 | Elf_Internal_Rela * relocs; | |
1644 | Elf_Internal_Sym * local_syms; | |
1645 | asection ** local_sections; | |
1646 | { | |
1647 | Elf_Internal_Shdr * symtab_hdr; | |
1648 | struct elf_link_hash_entry ** sym_hashes; | |
1649 | Elf_Internal_Rela * rel; | |
1650 | Elf_Internal_Rela * relend; | |
1651 | const char * name; | |
1652 | ||
1653 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; | |
1654 | sym_hashes = elf_sym_hashes (input_bfd); | |
1655 | ||
1656 | rel = relocs; | |
1657 | relend = relocs + input_section->reloc_count; | |
1658 | for (; rel < relend; rel++) | |
1659 | { | |
ba96a88f NC |
1660 | int r_type; |
1661 | reloc_howto_type * howto; | |
1662 | unsigned long r_symndx; | |
1663 | Elf_Internal_Sym * sym; | |
1664 | asection * sec; | |
252b5132 | 1665 | struct elf_link_hash_entry * h; |
ba96a88f NC |
1666 | bfd_vma relocation; |
1667 | bfd_reloc_status_type r; | |
1668 | arelent bfd_reloc; | |
f21f3fe0 | 1669 | |
252b5132 | 1670 | r_symndx = ELF32_R_SYM (rel->r_info); |
ba96a88f | 1671 | r_type = ELF32_R_TYPE (rel->r_info); |
252b5132 | 1672 | |
ba96a88f NC |
1673 | if ( r_type == R_ARM_GNU_VTENTRY |
1674 | || r_type == R_ARM_GNU_VTINHERIT) | |
252b5132 RH |
1675 | continue; |
1676 | ||
ba96a88f NC |
1677 | elf32_arm_info_to_howto (input_bfd, & bfd_reloc, rel); |
1678 | howto = bfd_reloc.howto; | |
252b5132 RH |
1679 | |
1680 | if (info->relocateable) | |
1681 | { | |
1682 | /* This is a relocateable link. We don't have to change | |
1683 | anything, unless the reloc is against a section symbol, | |
1684 | in which case we have to adjust according to where the | |
1685 | section symbol winds up in the output section. */ | |
1686 | if (r_symndx < symtab_hdr->sh_info) | |
1687 | { | |
1688 | sym = local_syms + r_symndx; | |
1689 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
1690 | { | |
1691 | sec = local_sections[r_symndx]; | |
1692 | #ifdef USE_REL | |
98c1d4aa NC |
1693 | arm_add_to_rel (input_bfd, contents + rel->r_offset, |
1694 | howto, sec->output_offset + sym->st_value); | |
252b5132 RH |
1695 | #else |
1696 | rel->r_addend += (sec->output_offset + sym->st_value) | |
1697 | >> howto->rightshift; | |
1698 | #endif | |
1699 | } | |
1700 | } | |
1701 | ||
1702 | continue; | |
1703 | } | |
1704 | ||
1705 | /* This is a final link. */ | |
1706 | h = NULL; | |
1707 | sym = NULL; | |
1708 | sec = NULL; | |
1709 | if (r_symndx < symtab_hdr->sh_info) | |
1710 | { | |
1711 | sym = local_syms + r_symndx; | |
1712 | sec = local_sections[r_symndx]; | |
1713 | relocation = (sec->output_section->vma | |
1714 | + sec->output_offset | |
1715 | + sym->st_value); | |
1716 | } | |
1717 | else | |
1718 | { | |
1719 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1720 | while (h->root.type == bfd_link_hash_indirect | |
1721 | || h->root.type == bfd_link_hash_warning) | |
1722 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1723 | if (h->root.type == bfd_link_hash_defined | |
1724 | || h->root.type == bfd_link_hash_defweak) | |
1725 | { | |
780a67af | 1726 | int relocation_needed = 1; |
f21f3fe0 | 1727 | |
780a67af | 1728 | sec = h->root.u.def.section; |
f21f3fe0 | 1729 | |
252b5132 | 1730 | /* In these cases, we don't need the relocation value. |
f21f3fe0 | 1731 | We check specially because in some obscure cases |
252b5132 RH |
1732 | sec->output_section will be NULL. */ |
1733 | switch (r_type) | |
1734 | { | |
1735 | case R_ARM_PC24: | |
1736 | case R_ARM_ABS32: | |
1737 | if (info->shared | |
1738 | && ( | |
1739 | (!info->symbolic && h->dynindx != -1) | |
97eaf9de | 1740 | || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 |
252b5132 RH |
1741 | ) |
1742 | && ((input_section->flags & SEC_ALLOC) != 0) | |
1743 | ) | |
780a67af | 1744 | relocation_needed = 0; |
252b5132 | 1745 | break; |
f21f3fe0 | 1746 | |
252b5132 | 1747 | case R_ARM_GOTPC: |
780a67af | 1748 | relocation_needed = 0; |
252b5132 | 1749 | break; |
f21f3fe0 | 1750 | |
252b5132 RH |
1751 | case R_ARM_GOT32: |
1752 | if (elf_hash_table(info)->dynamic_sections_created | |
1753 | && (!info->shared | |
1754 | || (!info->symbolic && h->dynindx != -1) | |
1755 | || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 | |
1756 | ) | |
1757 | ) | |
780a67af | 1758 | relocation_needed = 0; |
252b5132 | 1759 | break; |
f21f3fe0 | 1760 | |
252b5132 RH |
1761 | case R_ARM_PLT32: |
1762 | if (h->plt.offset != (bfd_vma)-1) | |
780a67af | 1763 | relocation_needed = 0; |
252b5132 | 1764 | break; |
f21f3fe0 | 1765 | |
252b5132 RH |
1766 | default: |
1767 | if (sec->output_section == NULL) | |
1768 | { | |
1769 | (*_bfd_error_handler) | |
1770 | (_("%s: warning: unresolvable relocation against symbol `%s' from %s section"), | |
1771 | bfd_get_filename (input_bfd), h->root.root.string, | |
1772 | bfd_get_section_name (input_bfd, input_section)); | |
780a67af | 1773 | relocation_needed = 0; |
252b5132 RH |
1774 | } |
1775 | } | |
780a67af NC |
1776 | |
1777 | if (relocation_needed) | |
1778 | relocation = h->root.u.def.value | |
1779 | + sec->output_section->vma | |
1780 | + sec->output_offset; | |
1781 | else | |
1782 | relocation = 0; | |
252b5132 RH |
1783 | } |
1784 | else if (h->root.type == bfd_link_hash_undefweak) | |
1785 | relocation = 0; | |
a72747a3 NC |
1786 | else if (info->shared && !info->symbolic && !info->no_undefined) |
1787 | relocation = 0; | |
252b5132 RH |
1788 | else |
1789 | { | |
1790 | if (!((*info->callbacks->undefined_symbol) | |
1791 | (info, h->root.root.string, input_bfd, | |
1792 | input_section, rel->r_offset))) | |
1793 | return false; | |
1794 | relocation = 0; | |
1795 | } | |
1796 | } | |
1797 | ||
1798 | if (h != NULL) | |
1799 | name = h->root.root.string; | |
1800 | else | |
1801 | { | |
1802 | name = (bfd_elf_string_from_elf_section | |
1803 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); | |
1804 | if (name == NULL || *name == '\0') | |
1805 | name = bfd_section_name (input_bfd, sec); | |
1806 | } | |
f21f3fe0 | 1807 | |
252b5132 RH |
1808 | r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd, |
1809 | input_section, contents, rel, | |
1810 | relocation, info, sec, name, | |
1811 | (h ? ELF_ST_TYPE (h->type) : | |
780a67af | 1812 | ELF_ST_TYPE (sym->st_info)), h); |
252b5132 RH |
1813 | |
1814 | if (r != bfd_reloc_ok) | |
1815 | { | |
1816 | const char * msg = (const char *) 0; | |
1817 | ||
1818 | switch (r) | |
1819 | { | |
1820 | case bfd_reloc_overflow: | |
1821 | if (!((*info->callbacks->reloc_overflow) | |
1822 | (info, name, howto->name, (bfd_vma) 0, | |
1823 | input_bfd, input_section, rel->r_offset))) | |
1824 | return false; | |
1825 | break; | |
1826 | ||
1827 | case bfd_reloc_undefined: | |
1828 | if (!((*info->callbacks->undefined_symbol) | |
1829 | (info, name, input_bfd, input_section, | |
1830 | rel->r_offset))) | |
1831 | return false; | |
1832 | break; | |
1833 | ||
1834 | case bfd_reloc_outofrange: | |
1835 | msg = _ ("internal error: out of range error"); | |
1836 | goto common_error; | |
1837 | ||
1838 | case bfd_reloc_notsupported: | |
1839 | msg = _ ("internal error: unsupported relocation error"); | |
1840 | goto common_error; | |
1841 | ||
1842 | case bfd_reloc_dangerous: | |
1843 | msg = _ ("internal error: dangerous error"); | |
1844 | goto common_error; | |
1845 | ||
1846 | default: | |
1847 | msg = _ ("internal error: unknown error"); | |
1848 | /* fall through */ | |
1849 | ||
1850 | common_error: | |
1851 | if (!((*info->callbacks->warning) | |
1852 | (info, msg, name, input_bfd, input_section, | |
1853 | rel->r_offset))) | |
1854 | return false; | |
1855 | break; | |
1856 | } | |
1857 | } | |
1858 | } | |
1859 | ||
1860 | return true; | |
1861 | } | |
1862 | ||
1863 | /* Function to keep ARM specific flags in the ELF header. */ | |
1864 | static boolean | |
1865 | elf32_arm_set_private_flags (abfd, flags) | |
1866 | bfd *abfd; | |
1867 | flagword flags; | |
1868 | { | |
1869 | if (elf_flags_init (abfd) | |
1870 | && elf_elfheader (abfd)->e_flags != flags) | |
1871 | { | |
1872 | if (flags & EF_INTERWORK) | |
1873 | _bfd_error_handler (_ ("\ | |
1874 | Warning: Not setting interwork flag of %s since it has already been specified as non-interworking"), | |
1875 | bfd_get_filename (abfd)); | |
1876 | else | |
1877 | _bfd_error_handler (_ ("\ | |
1878 | Warning: Clearing the interwork flag of %s due to outside request"), | |
1879 | bfd_get_filename (abfd)); | |
1880 | } | |
1881 | else | |
1882 | { | |
1883 | elf_elfheader (abfd)->e_flags = flags; | |
1884 | elf_flags_init (abfd) = true; | |
1885 | } | |
1886 | ||
1887 | return true; | |
1888 | } | |
1889 | ||
1890 | /* Copy backend specific data from one object module to another */ | |
1891 | static boolean | |
1892 | elf32_arm_copy_private_bfd_data (ibfd, obfd) | |
1893 | bfd *ibfd; | |
1894 | bfd *obfd; | |
1895 | { | |
1896 | flagword in_flags; | |
1897 | flagword out_flags; | |
1898 | ||
1899 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
1900 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
1901 | return true; | |
1902 | ||
1903 | in_flags = elf_elfheader (ibfd)->e_flags; | |
1904 | out_flags = elf_elfheader (obfd)->e_flags; | |
1905 | ||
1906 | if (elf_flags_init (obfd) && in_flags != out_flags) | |
1907 | { | |
1908 | /* Cannot mix PIC and non-PIC code. */ | |
1909 | if ((in_flags & EF_PIC) != (out_flags & EF_PIC)) | |
1910 | return false; | |
1911 | ||
1912 | /* Cannot mix APCS26 and APCS32 code. */ | |
1913 | if ((in_flags & EF_APCS_26) != (out_flags & EF_APCS_26)) | |
1914 | return false; | |
1915 | ||
1916 | /* Cannot mix float APCS and non-float APCS code. */ | |
1917 | if ((in_flags & EF_APCS_FLOAT) != (out_flags & EF_APCS_FLOAT)) | |
1918 | return false; | |
1919 | ||
1920 | /* If the src and dest have different interworking flags | |
1921 | then turn off the interworking bit. */ | |
1922 | if ((in_flags & EF_INTERWORK) != (out_flags & EF_INTERWORK)) | |
1923 | { | |
1924 | if (out_flags & EF_INTERWORK) | |
1925 | _bfd_error_handler (_ ("\ | |
1926 | Warning: Clearing the interwork flag in %s because non-interworking code in %s has been linked with it"), | |
1927 | bfd_get_filename (obfd), bfd_get_filename (ibfd)); | |
1928 | ||
1929 | in_flags &= ~EF_INTERWORK; | |
1930 | } | |
1931 | } | |
1932 | ||
1933 | elf_elfheader (obfd)->e_flags = in_flags; | |
1934 | elf_flags_init (obfd) = true; | |
1935 | ||
1936 | return true; | |
1937 | } | |
1938 | ||
1939 | /* Merge backend specific data from an object file to the output | |
1940 | object file when linking. */ | |
1941 | static boolean | |
1942 | elf32_arm_merge_private_bfd_data (ibfd, obfd) | |
1943 | bfd *ibfd; | |
1944 | bfd *obfd; | |
1945 | { | |
1946 | flagword out_flags; | |
1947 | flagword in_flags; | |
1948 | ||
1949 | if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
1950 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
1951 | return true; | |
1952 | ||
1953 | /* Check if we have the same endianess */ | |
1954 | if ( ibfd->xvec->byteorder != obfd->xvec->byteorder | |
1955 | && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN | |
1956 | && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN) | |
1957 | { | |
1958 | (*_bfd_error_handler) | |
1959 | (_("%s: compiled for a %s endian system and target is %s endian"), | |
1960 | bfd_get_filename (ibfd), | |
1961 | bfd_big_endian (ibfd) ? "big" : "little", | |
1962 | bfd_big_endian (obfd) ? "big" : "little"); | |
1963 | ||
1964 | bfd_set_error (bfd_error_wrong_format); | |
1965 | return false; | |
1966 | } | |
1967 | ||
1968 | /* The input BFD must have had its flags initialised. */ | |
1969 | /* The following seems bogus to me -- The flags are initialized in | |
1970 | the assembler but I don't think an elf_flags_init field is | |
1971 | written into the object */ | |
1972 | /* BFD_ASSERT (elf_flags_init (ibfd)); */ | |
1973 | ||
1974 | in_flags = elf_elfheader (ibfd)->e_flags; | |
1975 | out_flags = elf_elfheader (obfd)->e_flags; | |
1976 | ||
1977 | if (!elf_flags_init (obfd)) | |
1978 | { | |
1979 | /* If the input is the default architecture then do not | |
1980 | bother setting the flags for the output architecture, | |
1981 | instead allow future merges to do this. If no future | |
1982 | merges ever set these flags then they will retain their | |
1983 | unitialised values, which surprise surprise, correspond | |
1984 | to the default values. */ | |
1985 | if (bfd_get_arch_info (ibfd)->the_default) | |
1986 | return true; | |
1987 | ||
1988 | elf_flags_init (obfd) = true; | |
1989 | elf_elfheader (obfd)->e_flags = in_flags; | |
1990 | ||
1991 | if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) | |
1992 | && bfd_get_arch_info (obfd)->the_default) | |
1993 | return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd)); | |
1994 | ||
1995 | return true; | |
1996 | } | |
1997 | ||
1998 | /* Check flag compatibility. */ | |
1999 | if (in_flags == out_flags) | |
2000 | return true; | |
2001 | ||
2002 | /* Complain about various flag mismatches. */ | |
2003 | ||
2004 | if ((in_flags & EF_APCS_26) != (out_flags & EF_APCS_26)) | |
2005 | _bfd_error_handler (_ ("\ | |
2006 | Error: %s compiled for APCS-%d, whereas %s is compiled for APCS-%d"), | |
2007 | bfd_get_filename (ibfd), | |
2008 | in_flags & EF_APCS_26 ? 26 : 32, | |
2009 | bfd_get_filename (obfd), | |
2010 | out_flags & EF_APCS_26 ? 26 : 32); | |
2011 | ||
2012 | if ((in_flags & EF_APCS_FLOAT) != (out_flags & EF_APCS_FLOAT)) | |
2013 | _bfd_error_handler (_ ("\ | |
2014 | Error: %s passes floats in %s registers, whereas %s passes them in %s registers"), | |
2015 | bfd_get_filename (ibfd), | |
2016 | in_flags & EF_APCS_FLOAT ? _ ("float") : _ ("integer"), | |
2017 | bfd_get_filename (obfd), | |
2018 | out_flags & EF_APCS_26 ? _ ("float") : _ ("integer")); | |
2019 | ||
2020 | if ((in_flags & EF_PIC) != (out_flags & EF_PIC)) | |
2021 | _bfd_error_handler (_ ("\ | |
2022 | Error: %s is compiled as position %s code, whereas %s is not"), | |
2023 | bfd_get_filename (ibfd), | |
2024 | in_flags & EF_PIC ? _ ("independent") : _ ("dependent"), | |
2025 | bfd_get_filename (obfd)); | |
2026 | ||
2027 | /* Interworking mismatch is only a warning. */ | |
2028 | if ((in_flags & EF_INTERWORK) != (out_flags & EF_INTERWORK)) | |
2029 | { | |
2030 | _bfd_error_handler (_ ("\ | |
2031 | Warning: %s %s interworking, whereas %s %s"), | |
2032 | bfd_get_filename (ibfd), | |
2033 | in_flags & EF_INTERWORK ? _ ("supports") : _ ("does not support"), | |
2034 | bfd_get_filename (obfd), | |
2035 | out_flags & EF_INTERWORK ? _ ("does not") : _ ("does")); | |
2036 | return true; | |
2037 | } | |
2038 | ||
2039 | return false; | |
2040 | } | |
2041 | ||
2042 | /* Display the flags field */ | |
2043 | static boolean | |
2044 | elf32_arm_print_private_bfd_data (abfd, ptr) | |
2045 | bfd *abfd; | |
2046 | PTR ptr; | |
2047 | { | |
2048 | FILE *file = (FILE *) ptr; | |
2049 | ||
2050 | BFD_ASSERT (abfd != NULL && ptr != NULL); | |
2051 | ||
2052 | /* Print normal ELF private data. */ | |
2053 | _bfd_elf_print_private_bfd_data (abfd, ptr); | |
2054 | ||
2055 | /* Ignore init flag - it may not be set, despite the flags field containing valid data. */ | |
2056 | ||
2057 | /* xgettext:c-format */ | |
2058 | fprintf (file, _ ("private flags = %lx:"), elf_elfheader (abfd)->e_flags); | |
2059 | ||
2060 | if (elf_elfheader (abfd)->e_flags & EF_INTERWORK) | |
2061 | fprintf (file, _ (" [interworking enabled]")); | |
2062 | else | |
2063 | fprintf (file, _ (" [interworking not enabled]")); | |
2064 | ||
2065 | if (elf_elfheader (abfd)->e_flags & EF_APCS_26) | |
2066 | fprintf (file, _ (" [APCS-26]")); | |
2067 | else | |
2068 | fprintf (file, _ (" [APCS-32]")); | |
2069 | ||
2070 | if (elf_elfheader (abfd)->e_flags & EF_APCS_FLOAT) | |
2071 | fprintf (file, _ (" [floats passed in float registers]")); | |
2072 | else | |
2073 | fprintf (file, _ (" [floats passed in integer registers]")); | |
2074 | ||
2075 | if (elf_elfheader (abfd)->e_flags & EF_PIC) | |
2076 | fprintf (file, _ (" [position independent]")); | |
2077 | else | |
2078 | fprintf (file, _ (" [absolute position]")); | |
2079 | ||
2080 | fputc ('\n', file); | |
2081 | ||
2082 | return true; | |
2083 | } | |
2084 | ||
2085 | static int | |
2086 | elf32_arm_get_symbol_type (elf_sym, type) | |
2087 | Elf_Internal_Sym * elf_sym; | |
2088 | int type; | |
2089 | { | |
2090 | if (ELF_ST_TYPE (elf_sym->st_info) == STT_ARM_TFUNC) | |
2091 | return ELF_ST_TYPE (elf_sym->st_info); | |
2092 | else | |
2093 | return type; | |
2094 | } | |
f21f3fe0 | 2095 | |
252b5132 RH |
2096 | static asection * |
2097 | elf32_arm_gc_mark_hook (abfd, info, rel, h, sym) | |
2098 | bfd *abfd; | |
5f771d47 | 2099 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
252b5132 RH |
2100 | Elf_Internal_Rela *rel; |
2101 | struct elf_link_hash_entry *h; | |
2102 | Elf_Internal_Sym *sym; | |
2103 | { | |
2104 | if (h != NULL) | |
2105 | { | |
2106 | switch (ELF32_R_TYPE (rel->r_info)) | |
2107 | { | |
2108 | case R_ARM_GNU_VTINHERIT: | |
2109 | case R_ARM_GNU_VTENTRY: | |
2110 | break; | |
2111 | ||
2112 | default: | |
2113 | switch (h->root.type) | |
2114 | { | |
2115 | case bfd_link_hash_defined: | |
2116 | case bfd_link_hash_defweak: | |
2117 | return h->root.u.def.section; | |
2118 | ||
2119 | case bfd_link_hash_common: | |
2120 | return h->root.u.c.p->section; | |
e049a0de ILT |
2121 | |
2122 | default: | |
2123 | break; | |
252b5132 RH |
2124 | } |
2125 | } | |
2126 | } | |
2127 | else | |
2128 | { | |
2129 | if (!(elf_bad_symtab (abfd) | |
2130 | && ELF_ST_BIND (sym->st_info) != STB_LOCAL) | |
2131 | && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE) | |
2132 | && sym->st_shndx != SHN_COMMON)) | |
2133 | { | |
2134 | return bfd_section_from_elf_index (abfd, sym->st_shndx); | |
2135 | } | |
2136 | } | |
2137 | return NULL; | |
2138 | } | |
2139 | ||
780a67af NC |
2140 | /* Update the got entry reference counts for the section being removed. */ |
2141 | ||
252b5132 RH |
2142 | static boolean |
2143 | elf32_arm_gc_sweep_hook (abfd, info, sec, relocs) | |
5f771d47 ILT |
2144 | bfd *abfd ATTRIBUTE_UNUSED; |
2145 | struct bfd_link_info *info ATTRIBUTE_UNUSED; | |
2146 | asection *sec ATTRIBUTE_UNUSED; | |
2147 | const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED; | |
252b5132 | 2148 | { |
780a67af | 2149 | /* We don't support garbage collection of GOT and PLT relocs yet. */ |
252b5132 RH |
2150 | return true; |
2151 | } | |
2152 | ||
780a67af NC |
2153 | /* Look through the relocs for a section during the first phase. */ |
2154 | ||
252b5132 RH |
2155 | static boolean |
2156 | elf32_arm_check_relocs (abfd, info, sec, relocs) | |
2157 | bfd * abfd; | |
2158 | struct bfd_link_info * info; | |
2159 | asection * sec; | |
2160 | const Elf_Internal_Rela * relocs; | |
2161 | { | |
2162 | Elf_Internal_Shdr * symtab_hdr; | |
2163 | struct elf_link_hash_entry ** sym_hashes; | |
2164 | struct elf_link_hash_entry ** sym_hashes_end; | |
2165 | const Elf_Internal_Rela * rel; | |
2166 | const Elf_Internal_Rela * rel_end; | |
2167 | bfd * dynobj; | |
2168 | asection * sgot, *srelgot, *sreloc; | |
2169 | bfd_vma * local_got_offsets; | |
dece4658 | 2170 | |
252b5132 RH |
2171 | if (info->relocateable) |
2172 | return true; | |
dece4658 | 2173 | |
252b5132 | 2174 | sgot = srelgot = sreloc = NULL; |
dece4658 | 2175 | |
252b5132 RH |
2176 | dynobj = elf_hash_table (info)->dynobj; |
2177 | local_got_offsets = elf_local_got_offsets (abfd); | |
f21f3fe0 | 2178 | |
252b5132 RH |
2179 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
2180 | sym_hashes = elf_sym_hashes (abfd); | |
2181 | sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym); | |
2182 | if (!elf_bad_symtab (abfd)) | |
2183 | sym_hashes_end -= symtab_hdr->sh_info; | |
dece4658 | 2184 | |
252b5132 RH |
2185 | rel_end = relocs + sec->reloc_count; |
2186 | for (rel = relocs; rel < rel_end; rel++) | |
2187 | { | |
2188 | struct elf_link_hash_entry *h; | |
2189 | unsigned long r_symndx; | |
dece4658 | 2190 | |
252b5132 RH |
2191 | r_symndx = ELF32_R_SYM (rel->r_info); |
2192 | if (r_symndx < symtab_hdr->sh_info) | |
2193 | h = NULL; | |
2194 | else | |
2195 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
dece4658 | 2196 | |
252b5132 RH |
2197 | /* Some relocs require a global offset table. */ |
2198 | if (dynobj == NULL) | |
2199 | { | |
2200 | switch (ELF32_R_TYPE (rel->r_info)) | |
2201 | { | |
2202 | case R_ARM_GOT32: | |
2203 | case R_ARM_GOTOFF: | |
2204 | case R_ARM_GOTPC: | |
2205 | elf_hash_table (info)->dynobj = dynobj = abfd; | |
2206 | if (! _bfd_elf_create_got_section (dynobj, info)) | |
2207 | return false; | |
2208 | break; | |
2209 | ||
2210 | default: | |
2211 | break; | |
2212 | } | |
2213 | } | |
2214 | ||
2215 | switch (ELF32_R_TYPE (rel->r_info)) | |
2216 | { | |
2217 | case R_ARM_GOT32: | |
2218 | /* This symbol requires a global offset table entry. */ | |
2219 | if (sgot == NULL) | |
2220 | { | |
2221 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
2222 | BFD_ASSERT (sgot != NULL); | |
2223 | } | |
2224 | ||
2225 | /* Get the got relocation section if necessary. */ | |
2226 | if (srelgot == NULL | |
2227 | && (h != NULL || info->shared)) | |
2228 | { | |
2229 | srelgot = bfd_get_section_by_name (dynobj, ".rel.got"); | |
dece4658 | 2230 | |
252b5132 RH |
2231 | /* If no got relocation section, make one and initialize. */ |
2232 | if (srelgot == NULL) | |
2233 | { | |
2234 | srelgot = bfd_make_section (dynobj, ".rel.got"); | |
2235 | if (srelgot == NULL | |
2236 | || ! bfd_set_section_flags (dynobj, srelgot, | |
2237 | (SEC_ALLOC | |
2238 | | SEC_LOAD | |
2239 | | SEC_HAS_CONTENTS | |
2240 | | SEC_IN_MEMORY | |
2241 | | SEC_LINKER_CREATED | |
2242 | | SEC_READONLY)) | |
2243 | || ! bfd_set_section_alignment (dynobj, srelgot, 2)) | |
2244 | return false; | |
2245 | } | |
2246 | } | |
2247 | ||
2248 | if (h != NULL) | |
2249 | { | |
2250 | if (h->got.offset != (bfd_vma) -1) | |
2251 | /* We have already allocated space in the .got. */ | |
2252 | break; | |
f21f3fe0 | 2253 | |
252b5132 RH |
2254 | h->got.offset = sgot->_raw_size; |
2255 | ||
2256 | /* Make sure this symbol is output as a dynamic symbol. */ | |
2257 | if (h->dynindx == -1) | |
2258 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) | |
2259 | return false; | |
2260 | ||
2261 | srelgot->_raw_size += sizeof (Elf32_External_Rel); | |
2262 | } | |
2263 | else | |
2264 | { | |
2265 | /* This is a global offset table entry for a local | |
2266 | symbol. */ | |
2267 | if (local_got_offsets == NULL) | |
2268 | { | |
2269 | size_t size; | |
2270 | register unsigned int i; | |
2271 | ||
2272 | size = symtab_hdr->sh_info * sizeof (bfd_vma); | |
2273 | local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size); | |
2274 | if (local_got_offsets == NULL) | |
2275 | return false; | |
2276 | elf_local_got_offsets (abfd) = local_got_offsets; | |
2277 | for (i = 0; i < symtab_hdr->sh_info; i++) | |
2278 | local_got_offsets[i] = (bfd_vma) -1; | |
2279 | } | |
f21f3fe0 | 2280 | |
252b5132 RH |
2281 | if (local_got_offsets[r_symndx] != (bfd_vma) -1) |
2282 | /* We have already allocated space in the .got. */ | |
2283 | break; | |
2284 | ||
2285 | local_got_offsets[r_symndx] = sgot->_raw_size; | |
2286 | ||
2287 | if (info->shared) | |
2288 | /* If we are generating a shared object, we need to | |
2289 | output a R_ARM_RELATIVE reloc so that the dynamic | |
2290 | linker can adjust this GOT entry. */ | |
2291 | srelgot->_raw_size += sizeof (Elf32_External_Rel); | |
2292 | } | |
2293 | ||
2294 | sgot->_raw_size += 4; | |
2295 | break; | |
2296 | ||
2297 | case R_ARM_PLT32: | |
2298 | /* This symbol requires a procedure linkage table entry. We | |
2299 | actually build the entry in adjust_dynamic_symbol, | |
2300 | because this might be a case of linking PIC code which is | |
2301 | never referenced by a dynamic object, in which case we | |
2302 | don't need to generate a procedure linkage table entry | |
2303 | after all. */ | |
2304 | ||
2305 | /* If this is a local symbol, we resolve it directly without | |
2306 | creating a procedure linkage table entry. */ | |
2307 | if (h == NULL) | |
2308 | continue; | |
2309 | ||
2310 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; | |
2311 | break; | |
2312 | ||
2313 | case R_ARM_ABS32: | |
2314 | case R_ARM_REL32: | |
2315 | case R_ARM_PC24: | |
2316 | /* If we are creating a shared library, and this is a reloc | |
2317 | against a global symbol, or a non PC relative reloc | |
2318 | against a local symbol, then we need to copy the reloc | |
2319 | into the shared library. However, if we are linking with | |
2320 | -Bsymbolic, we do not need to copy a reloc against a | |
2321 | global symbol which is defined in an object we are | |
2322 | including in the link (i.e., DEF_REGULAR is set). At | |
2323 | this point we have not seen all the input files, so it is | |
2324 | possible that DEF_REGULAR is not set now but will be set | |
2325 | later (it is never cleared). We account for that | |
2326 | possibility below by storing information in the | |
2327 | pcrel_relocs_copied field of the hash table entry. */ | |
2328 | if (info->shared | |
2329 | && (ELF32_R_TYPE (rel->r_info) != R_ARM_PC24 | |
2330 | || (h != NULL | |
2331 | && (! info->symbolic | |
2332 | || (h->elf_link_hash_flags | |
2333 | & ELF_LINK_HASH_DEF_REGULAR) == 0)))) | |
2334 | { | |
2335 | /* When creating a shared object, we must copy these | |
2336 | reloc types into the output file. We create a reloc | |
2337 | section in dynobj and make room for this reloc. */ | |
2338 | if (sreloc == NULL) | |
2339 | { | |
2340 | const char * name; | |
2341 | ||
2342 | name = (bfd_elf_string_from_elf_section | |
2343 | (abfd, | |
2344 | elf_elfheader (abfd)->e_shstrndx, | |
2345 | elf_section_data (sec)->rel_hdr.sh_name)); | |
2346 | if (name == NULL) | |
2347 | return false; | |
2348 | ||
2349 | BFD_ASSERT (strncmp (name, ".rel", 4) == 0 | |
2350 | && strcmp (bfd_get_section_name (abfd, sec), | |
2351 | name + 4) == 0); | |
2352 | ||
2353 | sreloc = bfd_get_section_by_name (dynobj, name); | |
2354 | if (sreloc == NULL) | |
2355 | { | |
2356 | flagword flags; | |
2357 | ||
2358 | sreloc = bfd_make_section (dynobj, name); | |
2359 | flags = (SEC_HAS_CONTENTS | SEC_READONLY | |
2360 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
2361 | if ((sec->flags & SEC_ALLOC) != 0) | |
2362 | flags |= SEC_ALLOC | SEC_LOAD; | |
2363 | if (sreloc == NULL | |
2364 | || ! bfd_set_section_flags (dynobj, sreloc, flags) | |
2365 | || ! bfd_set_section_alignment (dynobj, sreloc, 2)) | |
2366 | return false; | |
2367 | } | |
2368 | } | |
2369 | ||
2370 | sreloc->_raw_size += sizeof (Elf32_External_Rel); | |
2371 | /* If we are linking with -Bsymbolic, and this is a | |
2372 | global symbol, we count the number of PC relative | |
2373 | relocations we have entered for this symbol, so that | |
2374 | we can discard them again if the symbol is later | |
2375 | defined by a regular object. Note that this function | |
2376 | is only called if we are using an elf_i386 linker | |
2377 | hash table, which means that h is really a pointer to | |
2378 | an elf_i386_link_hash_entry. */ | |
2379 | if (h != NULL && info->symbolic | |
2380 | && ELF32_R_TYPE (rel->r_info) == R_ARM_PC24) | |
2381 | { | |
2382 | struct elf32_arm_link_hash_entry * eh; | |
2383 | struct elf32_arm_pcrel_relocs_copied * p; | |
2384 | ||
2385 | eh = (struct elf32_arm_link_hash_entry *) h; | |
2386 | ||
2387 | for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next) | |
2388 | if (p->section == sreloc) | |
2389 | break; | |
2390 | ||
2391 | if (p == NULL) | |
2392 | { | |
2393 | p = ((struct elf32_arm_pcrel_relocs_copied *) | |
2394 | bfd_alloc (dynobj, sizeof * p)); | |
f21f3fe0 | 2395 | |
252b5132 RH |
2396 | if (p == NULL) |
2397 | return false; | |
2398 | p->next = eh->pcrel_relocs_copied; | |
2399 | eh->pcrel_relocs_copied = p; | |
2400 | p->section = sreloc; | |
2401 | p->count = 0; | |
2402 | } | |
2403 | ||
2404 | ++p->count; | |
2405 | } | |
2406 | } | |
2407 | break; | |
2408 | ||
2409 | /* This relocation describes the C++ object vtable hierarchy. | |
2410 | Reconstruct it for later use during GC. */ | |
2411 | case R_ARM_GNU_VTINHERIT: | |
2412 | if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
2413 | return false; | |
2414 | break; | |
dece4658 | 2415 | |
252b5132 RH |
2416 | /* This relocation describes which C++ vtable entries are actually |
2417 | used. Record for later use during GC. */ | |
2418 | case R_ARM_GNU_VTENTRY: | |
d512aa07 | 2419 | if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_offset)) |
252b5132 RH |
2420 | return false; |
2421 | break; | |
2422 | } | |
2423 | } | |
f21f3fe0 | 2424 | |
252b5132 RH |
2425 | return true; |
2426 | } | |
2427 | ||
f21f3fe0 | 2428 | |
252b5132 RH |
2429 | /* Find the nearest line to a particular section and offset, for error |
2430 | reporting. This code is a duplicate of the code in elf.c, except | |
2431 | that it also accepts STT_ARM_TFUNC as a symbol that names a function. */ | |
2432 | ||
2433 | static boolean | |
2434 | elf32_arm_find_nearest_line | |
2435 | (abfd, section, symbols, offset, filename_ptr, functionname_ptr, line_ptr) | |
2436 | bfd * abfd; | |
2437 | asection * section; | |
2438 | asymbol ** symbols; | |
2439 | bfd_vma offset; | |
2440 | CONST char ** filename_ptr; | |
2441 | CONST char ** functionname_ptr; | |
2442 | unsigned int * line_ptr; | |
2443 | { | |
2444 | boolean found; | |
2445 | const char * filename; | |
2446 | asymbol * func; | |
2447 | bfd_vma low_func; | |
2448 | asymbol ** p; | |
2449 | ||
2450 | if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset, | |
f21f3fe0 | 2451 | filename_ptr, functionname_ptr, |
5e38c3b8 | 2452 | line_ptr, 0)) |
252b5132 RH |
2453 | return true; |
2454 | ||
2455 | if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset, | |
2456 | &found, filename_ptr, | |
2457 | functionname_ptr, line_ptr, | |
2458 | &elf_tdata (abfd)->line_info)) | |
2459 | return false; | |
f21f3fe0 | 2460 | |
252b5132 RH |
2461 | if (found) |
2462 | return true; | |
2463 | ||
2464 | if (symbols == NULL) | |
2465 | return false; | |
2466 | ||
2467 | filename = NULL; | |
2468 | func = NULL; | |
2469 | low_func = 0; | |
2470 | ||
2471 | for (p = symbols; *p != NULL; p++) | |
2472 | { | |
2473 | elf_symbol_type *q; | |
2474 | ||
2475 | q = (elf_symbol_type *) *p; | |
2476 | ||
2477 | if (bfd_get_section (&q->symbol) != section) | |
2478 | continue; | |
2479 | ||
2480 | switch (ELF_ST_TYPE (q->internal_elf_sym.st_info)) | |
2481 | { | |
2482 | default: | |
2483 | break; | |
2484 | case STT_FILE: | |
2485 | filename = bfd_asymbol_name (&q->symbol); | |
2486 | break; | |
2487 | case STT_NOTYPE: | |
2488 | case STT_FUNC: | |
2489 | case STT_ARM_TFUNC: | |
2490 | if (q->symbol.section == section | |
2491 | && q->symbol.value >= low_func | |
2492 | && q->symbol.value <= offset) | |
2493 | { | |
2494 | func = (asymbol *) q; | |
2495 | low_func = q->symbol.value; | |
2496 | } | |
2497 | break; | |
2498 | } | |
2499 | } | |
2500 | ||
2501 | if (func == NULL) | |
2502 | return false; | |
2503 | ||
2504 | *filename_ptr = filename; | |
2505 | *functionname_ptr = bfd_asymbol_name (func); | |
2506 | *line_ptr = 0; | |
f21f3fe0 | 2507 | |
252b5132 RH |
2508 | return true; |
2509 | } | |
2510 | ||
2511 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
2512 | regular object. The current definition is in some section of the | |
2513 | dynamic object, but we're not including those sections. We have to | |
2514 | change the definition to something the rest of the link can | |
2515 | understand. */ | |
2516 | ||
2517 | static boolean | |
2518 | elf32_arm_adjust_dynamic_symbol (info, h) | |
2519 | struct bfd_link_info * info; | |
2520 | struct elf_link_hash_entry * h; | |
2521 | { | |
2522 | bfd * dynobj; | |
2523 | asection * s; | |
2524 | unsigned int power_of_two; | |
2525 | ||
2526 | dynobj = elf_hash_table (info)->dynobj; | |
2527 | ||
2528 | /* Make sure we know what is going on here. */ | |
2529 | BFD_ASSERT (dynobj != NULL | |
2530 | && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) | |
2531 | || h->weakdef != NULL | |
2532 | || ((h->elf_link_hash_flags | |
2533 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
2534 | && (h->elf_link_hash_flags | |
2535 | & ELF_LINK_HASH_REF_REGULAR) != 0 | |
2536 | && (h->elf_link_hash_flags | |
2537 | & ELF_LINK_HASH_DEF_REGULAR) == 0))); | |
2538 | ||
2539 | /* If this is a function, put it in the procedure linkage table. We | |
2540 | will fill in the contents of the procedure linkage table later, | |
2541 | when we know the address of the .got section. */ | |
2542 | if (h->type == STT_FUNC | |
2543 | || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) | |
2544 | { | |
2545 | if (! info->shared | |
2546 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
2547 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0) | |
2548 | { | |
2549 | /* This case can occur if we saw a PLT32 reloc in an input | |
2550 | file, but the symbol was never referred to by a dynamic | |
2551 | object. In such a case, we don't actually need to build | |
2552 | a procedure linkage table, and we can just do a PC32 | |
2553 | reloc instead. */ | |
2554 | BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0); | |
2555 | return true; | |
2556 | } | |
2557 | ||
2558 | /* Make sure this symbol is output as a dynamic symbol. */ | |
2559 | if (h->dynindx == -1) | |
2560 | { | |
2561 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) | |
2562 | return false; | |
2563 | } | |
2564 | ||
2565 | s = bfd_get_section_by_name (dynobj, ".plt"); | |
2566 | BFD_ASSERT (s != NULL); | |
2567 | ||
2568 | /* If this is the first .plt entry, make room for the special | |
2569 | first entry. */ | |
2570 | if (s->_raw_size == 0) | |
2571 | s->_raw_size += PLT_ENTRY_SIZE; | |
2572 | ||
2573 | /* If this symbol is not defined in a regular file, and we are | |
2574 | not generating a shared library, then set the symbol to this | |
2575 | location in the .plt. This is required to make function | |
2576 | pointers compare as equal between the normal executable and | |
2577 | the shared library. */ | |
2578 | if (! info->shared | |
2579 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
2580 | { | |
2581 | h->root.u.def.section = s; | |
2582 | h->root.u.def.value = s->_raw_size; | |
2583 | } | |
2584 | ||
2585 | h->plt.offset = s->_raw_size; | |
2586 | ||
2587 | /* Make room for this entry. */ | |
2588 | s->_raw_size += PLT_ENTRY_SIZE; | |
2589 | ||
2590 | /* We also need to make an entry in the .got.plt section, which | |
2591 | will be placed in the .got section by the linker script. */ | |
2592 | ||
2593 | s = bfd_get_section_by_name (dynobj, ".got.plt"); | |
2594 | BFD_ASSERT (s != NULL); | |
2595 | s->_raw_size += 4; | |
2596 | ||
2597 | /* We also need to make an entry in the .rel.plt section. */ | |
2598 | ||
2599 | s = bfd_get_section_by_name (dynobj, ".rel.plt"); | |
2600 | BFD_ASSERT (s != NULL); | |
2601 | s->_raw_size += sizeof (Elf32_External_Rel); | |
2602 | ||
2603 | return true; | |
2604 | } | |
2605 | ||
2606 | /* If this is a weak symbol, and there is a real definition, the | |
2607 | processor independent code will have arranged for us to see the | |
2608 | real definition first, and we can just use the same value. */ | |
2609 | if (h->weakdef != NULL) | |
2610 | { | |
2611 | BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined | |
2612 | || h->weakdef->root.type == bfd_link_hash_defweak); | |
2613 | h->root.u.def.section = h->weakdef->root.u.def.section; | |
2614 | h->root.u.def.value = h->weakdef->root.u.def.value; | |
2615 | return true; | |
2616 | } | |
2617 | ||
2618 | /* This is a reference to a symbol defined by a dynamic object which | |
2619 | is not a function. */ | |
2620 | ||
2621 | /* If we are creating a shared library, we must presume that the | |
2622 | only references to the symbol are via the global offset table. | |
2623 | For such cases we need not do anything here; the relocations will | |
2624 | be handled correctly by relocate_section. */ | |
2625 | if (info->shared) | |
2626 | return true; | |
2627 | ||
2628 | /* We must allocate the symbol in our .dynbss section, which will | |
2629 | become part of the .bss section of the executable. There will be | |
2630 | an entry for this symbol in the .dynsym section. The dynamic | |
2631 | object will contain position independent code, so all references | |
2632 | from the dynamic object to this symbol will go through the global | |
2633 | offset table. The dynamic linker will use the .dynsym entry to | |
2634 | determine the address it must put in the global offset table, so | |
2635 | both the dynamic object and the regular object will refer to the | |
2636 | same memory location for the variable. */ | |
2637 | ||
2638 | s = bfd_get_section_by_name (dynobj, ".dynbss"); | |
2639 | BFD_ASSERT (s != NULL); | |
2640 | ||
2641 | /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to | |
2642 | copy the initial value out of the dynamic object and into the | |
2643 | runtime process image. We need to remember the offset into the | |
2644 | .rel.bss section we are going to use. */ | |
2645 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) | |
2646 | { | |
2647 | asection *srel; | |
2648 | ||
2649 | srel = bfd_get_section_by_name (dynobj, ".rel.bss"); | |
2650 | BFD_ASSERT (srel != NULL); | |
2651 | srel->_raw_size += sizeof (Elf32_External_Rel); | |
2652 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; | |
2653 | } | |
2654 | ||
2655 | /* We need to figure out the alignment required for this symbol. I | |
2656 | have no idea how ELF linkers handle this. */ | |
2657 | power_of_two = bfd_log2 (h->size); | |
2658 | if (power_of_two > 3) | |
2659 | power_of_two = 3; | |
2660 | ||
2661 | /* Apply the required alignment. */ | |
2662 | s->_raw_size = BFD_ALIGN (s->_raw_size, | |
2663 | (bfd_size_type) (1 << power_of_two)); | |
2664 | if (power_of_two > bfd_get_section_alignment (dynobj, s)) | |
2665 | { | |
2666 | if (! bfd_set_section_alignment (dynobj, s, power_of_two)) | |
2667 | return false; | |
2668 | } | |
2669 | ||
2670 | /* Define the symbol as being at this point in the section. */ | |
2671 | h->root.u.def.section = s; | |
2672 | h->root.u.def.value = s->_raw_size; | |
2673 | ||
2674 | /* Increment the section size to make room for the symbol. */ | |
2675 | s->_raw_size += h->size; | |
2676 | ||
2677 | return true; | |
2678 | } | |
2679 | ||
2680 | /* Set the sizes of the dynamic sections. */ | |
2681 | ||
2682 | static boolean | |
2683 | elf32_arm_size_dynamic_sections (output_bfd, info) | |
2684 | bfd * output_bfd; | |
2685 | struct bfd_link_info * info; | |
2686 | { | |
2687 | bfd * dynobj; | |
2688 | asection * s; | |
2689 | boolean plt; | |
2690 | boolean relocs; | |
2691 | boolean reltext; | |
2692 | ||
2693 | dynobj = elf_hash_table (info)->dynobj; | |
2694 | BFD_ASSERT (dynobj != NULL); | |
2695 | ||
2696 | if (elf_hash_table (info)->dynamic_sections_created) | |
2697 | { | |
2698 | /* Set the contents of the .interp section to the interpreter. */ | |
2699 | if (! info->shared) | |
2700 | { | |
2701 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
2702 | BFD_ASSERT (s != NULL); | |
2703 | s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; | |
2704 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
2705 | } | |
2706 | } | |
2707 | else | |
2708 | { | |
2709 | /* We may have created entries in the .rel.got section. | |
2710 | However, if we are not creating the dynamic sections, we will | |
2711 | not actually use these entries. Reset the size of .rel.got, | |
2712 | which will cause it to get stripped from the output file | |
2713 | below. */ | |
2714 | s = bfd_get_section_by_name (dynobj, ".rel.got"); | |
2715 | if (s != NULL) | |
2716 | s->_raw_size = 0; | |
2717 | } | |
2718 | ||
2719 | /* If this is a -Bsymbolic shared link, then we need to discard all | |
2720 | PC relative relocs against symbols defined in a regular object. | |
2721 | We allocated space for them in the check_relocs routine, but we | |
2722 | will not fill them in in the relocate_section routine. */ | |
2723 | if (info->shared && info->symbolic) | |
2724 | elf32_arm_link_hash_traverse (elf32_arm_hash_table (info), | |
2725 | elf32_arm_discard_copies, | |
2726 | (PTR) NULL); | |
2727 | ||
2728 | /* The check_relocs and adjust_dynamic_symbol entry points have | |
2729 | determined the sizes of the various dynamic sections. Allocate | |
2730 | memory for them. */ | |
2731 | plt = false; | |
2732 | relocs = false; | |
2733 | reltext = false; | |
2734 | for (s = dynobj->sections; s != NULL; s = s->next) | |
2735 | { | |
2736 | const char * name; | |
2737 | boolean strip; | |
2738 | ||
2739 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
2740 | continue; | |
2741 | ||
2742 | /* It's OK to base decisions on the section name, because none | |
2743 | of the dynobj section names depend upon the input files. */ | |
2744 | name = bfd_get_section_name (dynobj, s); | |
2745 | ||
2746 | strip = false; | |
2747 | ||
2748 | if (strcmp (name, ".plt") == 0) | |
2749 | { | |
2750 | if (s->_raw_size == 0) | |
2751 | { | |
2752 | /* Strip this section if we don't need it; see the | |
2753 | comment below. */ | |
2754 | strip = true; | |
2755 | } | |
2756 | else | |
2757 | { | |
2758 | /* Remember whether there is a PLT. */ | |
2759 | plt = true; | |
2760 | } | |
2761 | } | |
2762 | else if (strncmp (name, ".rel", 4) == 0) | |
2763 | { | |
2764 | if (s->_raw_size == 0) | |
2765 | { | |
2766 | /* If we don't need this section, strip it from the | |
2767 | output file. This is mostly to handle .rel.bss and | |
2768 | .rel.plt. We must create both sections in | |
2769 | create_dynamic_sections, because they must be created | |
2770 | before the linker maps input sections to output | |
2771 | sections. The linker does that before | |
2772 | adjust_dynamic_symbol is called, and it is that | |
2773 | function which decides whether anything needs to go | |
2774 | into these sections. */ | |
2775 | strip = true; | |
2776 | } | |
2777 | else | |
2778 | { | |
2779 | asection * target; | |
2780 | ||
2781 | /* Remember whether there are any reloc sections other | |
2782 | than .rel.plt. */ | |
2783 | if (strcmp (name, ".rel.plt") != 0) | |
2784 | { | |
2785 | const char *outname; | |
2786 | ||
2787 | relocs = true; | |
2788 | ||
2789 | /* If this relocation section applies to a read only | |
2790 | section, then we probably need a DT_TEXTREL | |
2791 | entry. The entries in the .rel.plt section | |
2792 | really apply to the .got section, which we | |
2793 | created ourselves and so know is not readonly. */ | |
2794 | outname = bfd_get_section_name (output_bfd, | |
2795 | s->output_section); | |
2796 | target = bfd_get_section_by_name (output_bfd, outname + 4); | |
2797 | if (target != NULL | |
2798 | && (target->flags & SEC_READONLY) != 0 | |
2799 | && (target->flags & SEC_ALLOC) != 0) | |
2800 | reltext = true; | |
2801 | } | |
2802 | ||
2803 | /* We use the reloc_count field as a counter if we need | |
2804 | to copy relocs into the output file. */ | |
2805 | s->reloc_count = 0; | |
2806 | } | |
2807 | } | |
2808 | else if (strncmp (name, ".got", 4) != 0) | |
2809 | { | |
2810 | /* It's not one of our sections, so don't allocate space. */ | |
2811 | continue; | |
2812 | } | |
2813 | ||
2814 | if (strip) | |
2815 | { | |
2816 | asection ** spp; | |
2817 | ||
2818 | for (spp = &s->output_section->owner->sections; | |
2819 | *spp != s->output_section; | |
2820 | spp = &(*spp)->next) | |
2821 | ; | |
2822 | *spp = s->output_section->next; | |
2823 | --s->output_section->owner->section_count; | |
2824 | ||
2825 | continue; | |
2826 | } | |
2827 | ||
2828 | /* Allocate memory for the section contents. */ | |
2829 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); | |
2830 | if (s->contents == NULL && s->_raw_size != 0) | |
2831 | return false; | |
2832 | } | |
2833 | ||
2834 | if (elf_hash_table (info)->dynamic_sections_created) | |
2835 | { | |
2836 | /* Add some entries to the .dynamic section. We fill in the | |
2837 | values later, in elf32_arm_finish_dynamic_sections, but we | |
2838 | must add the entries now so that we get the correct size for | |
2839 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
2840 | dynamic linker and used by the debugger. */ | |
2841 | if (! info->shared) | |
2842 | { | |
2843 | if (! bfd_elf32_add_dynamic_entry (info, DT_DEBUG, 0)) | |
2844 | return false; | |
2845 | } | |
2846 | ||
2847 | if (plt) | |
2848 | { | |
2849 | if (! bfd_elf32_add_dynamic_entry (info, DT_PLTGOT, 0) | |
2850 | || ! bfd_elf32_add_dynamic_entry (info, DT_PLTRELSZ, 0) | |
2851 | || ! bfd_elf32_add_dynamic_entry (info, DT_PLTREL, DT_REL) | |
2852 | || ! bfd_elf32_add_dynamic_entry (info, DT_JMPREL, 0)) | |
2853 | return false; | |
2854 | } | |
2855 | ||
2856 | if (relocs) | |
2857 | { | |
2858 | if (! bfd_elf32_add_dynamic_entry (info, DT_REL, 0) | |
2859 | || ! bfd_elf32_add_dynamic_entry (info, DT_RELSZ, 0) | |
2860 | || ! bfd_elf32_add_dynamic_entry (info, DT_RELENT, | |
2861 | sizeof (Elf32_External_Rel))) | |
2862 | return false; | |
2863 | } | |
2864 | ||
2865 | if (reltext) | |
2866 | { | |
2867 | if (! bfd_elf32_add_dynamic_entry (info, DT_TEXTREL, 0)) | |
2868 | return false; | |
2869 | } | |
2870 | } | |
2871 | ||
2872 | return true; | |
2873 | } | |
2874 | ||
2875 | /* This function is called via elf32_arm_link_hash_traverse if we are | |
2876 | creating a shared object with -Bsymbolic. It discards the space | |
2877 | allocated to copy PC relative relocs against symbols which are | |
2878 | defined in regular objects. We allocated space for them in the | |
2879 | check_relocs routine, but we won't fill them in in the | |
2880 | relocate_section routine. */ | |
2881 | ||
2882 | static boolean | |
2883 | elf32_arm_discard_copies (h, ignore) | |
2884 | struct elf32_arm_link_hash_entry * h; | |
5f771d47 | 2885 | PTR ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
2886 | { |
2887 | struct elf32_arm_pcrel_relocs_copied * s; | |
2888 | ||
2889 | /* We only discard relocs for symbols defined in a regular object. */ | |
2890 | if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
2891 | return true; | |
2892 | ||
2893 | for (s = h->pcrel_relocs_copied; s != NULL; s = s->next) | |
2894 | s->section->_raw_size -= s->count * sizeof (Elf32_External_Rel); | |
2895 | ||
2896 | return true; | |
2897 | } | |
2898 | ||
2899 | /* Finish up dynamic symbol handling. We set the contents of various | |
2900 | dynamic sections here. */ | |
2901 | ||
2902 | static boolean | |
2903 | elf32_arm_finish_dynamic_symbol (output_bfd, info, h, sym) | |
2904 | bfd * output_bfd; | |
2905 | struct bfd_link_info * info; | |
2906 | struct elf_link_hash_entry * h; | |
2907 | Elf_Internal_Sym * sym; | |
2908 | { | |
2909 | bfd * dynobj; | |
2910 | ||
2911 | dynobj = elf_hash_table (info)->dynobj; | |
2912 | ||
2913 | if (h->plt.offset != (bfd_vma) -1) | |
2914 | { | |
2915 | asection * splt; | |
2916 | asection * sgot; | |
2917 | asection * srel; | |
2918 | bfd_vma plt_index; | |
2919 | bfd_vma got_offset; | |
2920 | Elf_Internal_Rel rel; | |
2921 | ||
2922 | /* This symbol has an entry in the procedure linkage table. Set | |
2923 | it up. */ | |
2924 | ||
2925 | BFD_ASSERT (h->dynindx != -1); | |
2926 | ||
2927 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
2928 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); | |
2929 | srel = bfd_get_section_by_name (dynobj, ".rel.plt"); | |
2930 | BFD_ASSERT (splt != NULL && sgot != NULL && srel != NULL); | |
2931 | ||
2932 | /* Get the index in the procedure linkage table which | |
2933 | corresponds to this symbol. This is the index of this symbol | |
2934 | in all the symbols for which we are making plt entries. The | |
2935 | first entry in the procedure linkage table is reserved. */ | |
2936 | plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; | |
2937 | ||
2938 | /* Get the offset into the .got table of the entry that | |
2939 | corresponds to this function. Each .got entry is 4 bytes. | |
2940 | The first three are reserved. */ | |
2941 | got_offset = (plt_index + 3) * 4; | |
2942 | ||
2943 | /* Fill in the entry in the procedure linkage table. */ | |
2944 | memcpy (splt->contents + h->plt.offset, | |
2945 | elf32_arm_plt_entry, | |
2946 | PLT_ENTRY_SIZE); | |
2947 | bfd_put_32 (output_bfd, | |
2948 | (sgot->output_section->vma | |
2949 | + sgot->output_offset | |
f21f3fe0 | 2950 | + got_offset |
252b5132 RH |
2951 | - splt->output_section->vma |
2952 | - splt->output_offset | |
2953 | - h->plt.offset - 12), | |
2954 | splt->contents + h->plt.offset + 12); | |
2955 | ||
2956 | /* Fill in the entry in the global offset table. */ | |
2957 | bfd_put_32 (output_bfd, | |
2958 | (splt->output_section->vma | |
2959 | + splt->output_offset), | |
2960 | sgot->contents + got_offset); | |
2961 | ||
2962 | /* Fill in the entry in the .rel.plt section. */ | |
2963 | rel.r_offset = (sgot->output_section->vma | |
2964 | + sgot->output_offset | |
2965 | + got_offset); | |
2966 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT); | |
2967 | bfd_elf32_swap_reloc_out (output_bfd, &rel, | |
2968 | ((Elf32_External_Rel *) srel->contents | |
2969 | + plt_index)); | |
2970 | ||
2971 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
2972 | { | |
2973 | /* Mark the symbol as undefined, rather than as defined in | |
2974 | the .plt section. Leave the value alone. */ | |
2975 | sym->st_shndx = SHN_UNDEF; | |
2976 | } | |
2977 | } | |
2978 | ||
2979 | if (h->got.offset != (bfd_vma) -1) | |
2980 | { | |
2981 | asection * sgot; | |
2982 | asection * srel; | |
2983 | Elf_Internal_Rel rel; | |
2984 | ||
2985 | /* This symbol has an entry in the global offset table. Set it | |
2986 | up. */ | |
f21f3fe0 | 2987 | |
252b5132 RH |
2988 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
2989 | srel = bfd_get_section_by_name (dynobj, ".rel.got"); | |
2990 | BFD_ASSERT (sgot != NULL && srel != NULL); | |
2991 | ||
2992 | rel.r_offset = (sgot->output_section->vma | |
2993 | + sgot->output_offset | |
2994 | + (h->got.offset &~ 1)); | |
2995 | ||
2996 | /* If this is a -Bsymbolic link, and the symbol is defined | |
2997 | locally, we just want to emit a RELATIVE reloc. The entry in | |
2998 | the global offset table will already have been initialized in | |
2999 | the relocate_section function. */ | |
3000 | if (info->shared | |
3001 | && (info->symbolic || h->dynindx == -1) | |
3002 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) | |
3003 | rel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE); | |
3004 | else | |
3005 | { | |
3006 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset); | |
3007 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT); | |
3008 | } | |
3009 | ||
3010 | bfd_elf32_swap_reloc_out (output_bfd, &rel, | |
3011 | ((Elf32_External_Rel *) srel->contents | |
3012 | + srel->reloc_count)); | |
3013 | ++srel->reloc_count; | |
3014 | } | |
3015 | ||
3016 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) | |
3017 | { | |
3018 | asection * s; | |
3019 | Elf_Internal_Rel rel; | |
3020 | ||
3021 | /* This symbol needs a copy reloc. Set it up. */ | |
3022 | ||
3023 | BFD_ASSERT (h->dynindx != -1 | |
3024 | && (h->root.type == bfd_link_hash_defined | |
3025 | || h->root.type == bfd_link_hash_defweak)); | |
3026 | ||
3027 | s = bfd_get_section_by_name (h->root.u.def.section->owner, | |
3028 | ".rel.bss"); | |
3029 | BFD_ASSERT (s != NULL); | |
3030 | ||
3031 | rel.r_offset = (h->root.u.def.value | |
3032 | + h->root.u.def.section->output_section->vma | |
3033 | + h->root.u.def.section->output_offset); | |
3034 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY); | |
3035 | bfd_elf32_swap_reloc_out (output_bfd, &rel, | |
3036 | ((Elf32_External_Rel *) s->contents | |
3037 | + s->reloc_count)); | |
3038 | ++s->reloc_count; | |
3039 | } | |
3040 | ||
3041 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
3042 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
3043 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
3044 | sym->st_shndx = SHN_ABS; | |
3045 | ||
3046 | return true; | |
3047 | } | |
3048 | ||
3049 | /* Finish up the dynamic sections. */ | |
3050 | ||
3051 | static boolean | |
3052 | elf32_arm_finish_dynamic_sections (output_bfd, info) | |
3053 | bfd * output_bfd; | |
3054 | struct bfd_link_info * info; | |
3055 | { | |
3056 | bfd * dynobj; | |
3057 | asection * sgot; | |
3058 | asection * sdyn; | |
3059 | ||
3060 | dynobj = elf_hash_table (info)->dynobj; | |
3061 | ||
3062 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); | |
3063 | BFD_ASSERT (sgot != NULL); | |
3064 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); | |
3065 | ||
3066 | if (elf_hash_table (info)->dynamic_sections_created) | |
3067 | { | |
3068 | asection *splt; | |
3069 | Elf32_External_Dyn *dyncon, *dynconend; | |
3070 | ||
3071 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
3072 | BFD_ASSERT (splt != NULL && sdyn != NULL); | |
3073 | ||
3074 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
3075 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size); | |
3076 | for (; dyncon < dynconend; dyncon++) | |
3077 | { | |
3078 | Elf_Internal_Dyn dyn; | |
3079 | const char * name; | |
3080 | asection * s; | |
3081 | ||
3082 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
3083 | ||
3084 | switch (dyn.d_tag) | |
3085 | { | |
3086 | default: | |
3087 | break; | |
3088 | ||
3089 | case DT_PLTGOT: | |
3090 | name = ".got"; | |
3091 | goto get_vma; | |
3092 | case DT_JMPREL: | |
3093 | name = ".rel.plt"; | |
3094 | get_vma: | |
3095 | s = bfd_get_section_by_name (output_bfd, name); | |
3096 | BFD_ASSERT (s != NULL); | |
3097 | dyn.d_un.d_ptr = s->vma; | |
3098 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
3099 | break; | |
3100 | ||
3101 | case DT_PLTRELSZ: | |
3102 | s = bfd_get_section_by_name (output_bfd, ".rel.plt"); | |
3103 | BFD_ASSERT (s != NULL); | |
3104 | if (s->_cooked_size != 0) | |
3105 | dyn.d_un.d_val = s->_cooked_size; | |
3106 | else | |
3107 | dyn.d_un.d_val = s->_raw_size; | |
3108 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
3109 | break; | |
3110 | ||
3111 | case DT_RELSZ: | |
3112 | /* My reading of the SVR4 ABI indicates that the | |
3113 | procedure linkage table relocs (DT_JMPREL) should be | |
3114 | included in the overall relocs (DT_REL). This is | |
3115 | what Solaris does. However, UnixWare can not handle | |
3116 | that case. Therefore, we override the DT_RELSZ entry | |
3117 | here to make it not include the JMPREL relocs. Since | |
3118 | the linker script arranges for .rel.plt to follow all | |
3119 | other relocation sections, we don't have to worry | |
3120 | about changing the DT_REL entry. */ | |
3121 | s = bfd_get_section_by_name (output_bfd, ".rel.plt"); | |
3122 | if (s != NULL) | |
3123 | { | |
3124 | if (s->_cooked_size != 0) | |
3125 | dyn.d_un.d_val -= s->_cooked_size; | |
3126 | else | |
3127 | dyn.d_un.d_val -= s->_raw_size; | |
3128 | } | |
3129 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
3130 | break; | |
3131 | } | |
3132 | } | |
3133 | ||
3134 | /* Fill in the first entry in the procedure linkage table. */ | |
3135 | if (splt->_raw_size > 0) | |
3136 | memcpy (splt->contents, elf32_arm_plt0_entry, PLT_ENTRY_SIZE); | |
3137 | ||
3138 | /* UnixWare sets the entsize of .plt to 4, although that doesn't | |
3139 | really seem like the right value. */ | |
3140 | elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4; | |
3141 | } | |
3142 | ||
3143 | /* Fill in the first three entries in the global offset table. */ | |
3144 | if (sgot->_raw_size > 0) | |
3145 | { | |
3146 | if (sdyn == NULL) | |
3147 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); | |
3148 | else | |
3149 | bfd_put_32 (output_bfd, | |
3150 | sdyn->output_section->vma + sdyn->output_offset, | |
3151 | sgot->contents); | |
3152 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); | |
3153 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); | |
3154 | } | |
3155 | ||
3156 | elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; | |
3157 | ||
3158 | return true; | |
3159 | } | |
3160 | ||
ba96a88f NC |
3161 | static void |
3162 | elf32_arm_post_process_headers (abfd, link_info) | |
3163 | bfd * abfd; | |
5f771d47 | 3164 | struct bfd_link_info * link_info ATTRIBUTE_UNUSED; |
ba96a88f NC |
3165 | { |
3166 | Elf_Internal_Ehdr * i_ehdrp; /* Elf file header, internal form */ | |
3167 | ||
3168 | i_ehdrp = elf_elfheader (abfd); | |
3169 | ||
3170 | i_ehdrp->e_ident[EI_OSABI] = ARM_ELF_OS_ABI_VERSION; | |
3171 | i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION; | |
3172 | } | |
3173 | ||
3174 | ||
252b5132 RH |
3175 | #define ELF_ARCH bfd_arch_arm |
3176 | #define ELF_MACHINE_CODE EM_ARM | |
f21f3fe0 | 3177 | #define ELF_MAXPAGESIZE 0x8000 |
252b5132 RH |
3178 | |
3179 | ||
3180 | #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data | |
3181 | #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data | |
3182 | #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags | |
3183 | #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data | |
3184 | #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create | |
3185 | #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup | |
3186 | #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line | |
3187 | ||
3188 | #define elf_backend_get_symbol_type elf32_arm_get_symbol_type | |
3189 | #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook | |
3190 | #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook | |
3191 | #define elf_backend_check_relocs elf32_arm_check_relocs | |
3192 | #define elf_backend_relocate_section elf32_arm_relocate_section | |
3193 | #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol | |
3194 | #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections | |
3195 | #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol | |
3196 | #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections | |
3197 | #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections | |
ba96a88f | 3198 | #define elf_backend_post_process_headers elf32_arm_post_process_headers |
252b5132 RH |
3199 | |
3200 | #define elf_backend_can_gc_sections 1 | |
3201 | #define elf_backend_plt_readonly 1 | |
3202 | #define elf_backend_want_got_plt 1 | |
3203 | #define elf_backend_want_plt_sym 0 | |
3204 | ||
04f7c78d NC |
3205 | #define elf_backend_got_header_size 12 |
3206 | #define elf_backend_plt_header_size PLT_ENTRY_SIZE | |
3207 | ||
252b5132 | 3208 | #include "elf32-target.h" |