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252b5132 | 1 | /* 32-bit ELF support for ARM |
5eefb65f | 2 | Copyright 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc. |
252b5132 RH |
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 | ||
252b5132 RH |
20 | typedef unsigned long int insn32; |
21 | typedef unsigned short int insn16; | |
22 | ||
23 | static boolean elf32_arm_set_private_flags | |
24 | PARAMS ((bfd *, flagword)); | |
25 | static boolean elf32_arm_copy_private_bfd_data | |
26 | PARAMS ((bfd *, bfd *)); | |
27 | static boolean elf32_arm_merge_private_bfd_data | |
28 | PARAMS ((bfd *, bfd *)); | |
29 | static boolean elf32_arm_print_private_bfd_data | |
30 | PARAMS ((bfd *, PTR)); | |
f21f3fe0 | 31 | static int elf32_arm_get_symbol_type |
252b5132 RH |
32 | PARAMS (( Elf_Internal_Sym *, int)); |
33 | static struct bfd_link_hash_table *elf32_arm_link_hash_table_create | |
34 | PARAMS ((bfd *)); | |
35 | static bfd_reloc_status_type elf32_arm_final_link_relocate | |
780a67af NC |
36 | PARAMS ((reloc_howto_type *, bfd *, bfd *, asection *, bfd_byte *, |
37 | Elf_Internal_Rela *, bfd_vma, struct bfd_link_info *, asection *, | |
dc810e39 | 38 | const char *, int, struct elf_link_hash_entry *)); |
252b5132 RH |
39 | static insn32 insert_thumb_branch |
40 | PARAMS ((insn32, int)); | |
41 | static struct elf_link_hash_entry *find_thumb_glue | |
917583ad | 42 | PARAMS ((struct bfd_link_info *, const char *, bfd *)); |
252b5132 | 43 | static struct elf_link_hash_entry *find_arm_glue |
917583ad | 44 | PARAMS ((struct bfd_link_info *, const char *, bfd *)); |
252b5132 RH |
45 | static void record_arm_to_thumb_glue |
46 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); | |
47 | static void record_thumb_to_arm_glue | |
48 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); | |
ba96a88f NC |
49 | static void elf32_arm_post_process_headers |
50 | PARAMS ((bfd *, struct bfd_link_info *)); | |
bcbdc74c NC |
51 | static int elf32_arm_to_thumb_stub |
52 | PARAMS ((struct bfd_link_info *, const char *, bfd *, bfd *, asection *, | |
53 | bfd_byte *, asection *, bfd_vma, bfd_signed_vma, bfd_vma)); | |
54 | static int elf32_thumb_to_arm_stub | |
55 | PARAMS ((struct bfd_link_info *, const char *, bfd *, bfd *, asection *, | |
56 | bfd_byte *, asection *, bfd_vma, bfd_signed_vma, bfd_vma)); | |
917583ad NC |
57 | static boolean elf32_arm_relocate_section |
58 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, | |
59 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); | |
60 | static asection * elf32_arm_gc_mark_hook | |
61 | PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *, | |
62 | struct elf_link_hash_entry *, Elf_Internal_Sym *)); | |
63 | static boolean elf32_arm_gc_sweep_hook | |
64 | PARAMS ((bfd *, struct bfd_link_info *, asection *, | |
65 | const Elf_Internal_Rela *)); | |
66 | static boolean elf32_arm_check_relocs | |
67 | PARAMS ((bfd *, struct bfd_link_info *, asection *, | |
68 | const Elf_Internal_Rela *)); | |
69 | static boolean elf32_arm_find_nearest_line | |
70 | PARAMS ((bfd *, asection *, asymbol **, bfd_vma, const char **, | |
71 | const char **, unsigned int *)); | |
72 | static boolean elf32_arm_adjust_dynamic_symbol | |
73 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); | |
74 | static boolean elf32_arm_size_dynamic_sections | |
75 | PARAMS ((bfd *, struct bfd_link_info *)); | |
76 | static boolean elf32_arm_finish_dynamic_symbol | |
77 | PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, | |
78 | Elf_Internal_Sym *)); | |
79 | static boolean elf32_arm_finish_dynamic_sections | |
80 | PARAMS ((bfd *, struct bfd_link_info *)); | |
81 | static struct bfd_hash_entry * elf32_arm_link_hash_newfunc | |
82 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); | |
83 | #ifdef USE_REL | |
84 | static void arm_add_to_rel | |
85 | PARAMS ((bfd *, bfd_byte *, reloc_howto_type *, bfd_signed_vma)); | |
86 | #endif | |
252b5132 | 87 | |
917583ad NC |
88 | boolean bfd_elf32_arm_allocate_interworking_sections |
89 | PARAMS ((struct bfd_link_info *)); | |
90 | boolean bfd_elf32_arm_get_bfd_for_interworking | |
91 | PARAMS ((bfd *, struct bfd_link_info *)); | |
92 | boolean bfd_elf32_arm_process_before_allocation | |
93 | PARAMS ((bfd *, struct bfd_link_info *, int)); | |
99e4ae17 | 94 | static enum elf_reloc_type_class elf32_arm_reloc_type_class |
f51e552e | 95 | PARAMS ((const Elf_Internal_Rela *)); |
99e4ae17 | 96 | |
fd2ec330 | 97 | #define INTERWORK_FLAG(abfd) (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK) |
9b485d32 | 98 | |
252b5132 RH |
99 | /* The linker script knows the section names for placement. |
100 | The entry_names are used to do simple name mangling on the stubs. | |
101 | Given a function name, and its type, the stub can be found. The | |
9b485d32 | 102 | name can be changed. The only requirement is the %s be present. */ |
252b5132 RH |
103 | #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t" |
104 | #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb" | |
105 | ||
106 | #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7" | |
107 | #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm" | |
108 | ||
109 | /* The name of the dynamic interpreter. This is put in the .interp | |
110 | section. */ | |
111 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" | |
112 | ||
113 | /* The size in bytes of an entry in the procedure linkage table. */ | |
252b5132 RH |
114 | #define PLT_ENTRY_SIZE 16 |
115 | ||
116 | /* The first entry in a procedure linkage table looks like | |
117 | this. It is set up so that any shared library function that is | |
59f2c4e7 | 118 | called before the relocation has been set up calls the dynamic |
9b485d32 | 119 | linker first. */ |
dc810e39 | 120 | static const bfd_vma elf32_arm_plt0_entry [PLT_ENTRY_SIZE / 4] = |
917583ad NC |
121 | { |
122 | 0xe52de004, /* str lr, [sp, #-4]! */ | |
123 | 0xe59fe010, /* ldr lr, [pc, #16] */ | |
124 | 0xe08fe00e, /* add lr, pc, lr */ | |
125 | 0xe5bef008 /* ldr pc, [lr, #8]! */ | |
126 | }; | |
252b5132 RH |
127 | |
128 | /* Subsequent entries in a procedure linkage table look like | |
129 | this. */ | |
dc810e39 | 130 | static const bfd_vma elf32_arm_plt_entry [PLT_ENTRY_SIZE / 4] = |
99e4ae17 | 131 | { |
917583ad NC |
132 | 0xe59fc004, /* ldr ip, [pc, #4] */ |
133 | 0xe08fc00c, /* add ip, pc, ip */ | |
134 | 0xe59cf000, /* ldr pc, [ip] */ | |
135 | 0x00000000 /* offset to symbol in got */ | |
136 | }; | |
252b5132 | 137 | |
252b5132 RH |
138 | /* The ARM linker needs to keep track of the number of relocs that it |
139 | decides to copy in check_relocs for each symbol. This is so that | |
140 | it can discard PC relative relocs if it doesn't need them when | |
141 | linking with -Bsymbolic. We store the information in a field | |
142 | extending the regular ELF linker hash table. */ | |
143 | ||
144 | /* This structure keeps track of the number of PC relative relocs we | |
145 | have copied for a given symbol. */ | |
252b5132 | 146 | struct elf32_arm_pcrel_relocs_copied |
917583ad NC |
147 | { |
148 | /* Next section. */ | |
149 | struct elf32_arm_pcrel_relocs_copied * next; | |
150 | /* A section in dynobj. */ | |
151 | asection * section; | |
152 | /* Number of relocs copied in this section. */ | |
153 | bfd_size_type count; | |
154 | }; | |
252b5132 | 155 | |
ba96a88f | 156 | /* Arm ELF linker hash entry. */ |
252b5132 | 157 | struct elf32_arm_link_hash_entry |
917583ad NC |
158 | { |
159 | struct elf_link_hash_entry root; | |
252b5132 | 160 | |
917583ad NC |
161 | /* Number of PC relative relocs copied for this symbol. */ |
162 | struct elf32_arm_pcrel_relocs_copied * pcrel_relocs_copied; | |
163 | }; | |
252b5132 RH |
164 | |
165 | /* Declare this now that the above structures are defined. */ | |
252b5132 RH |
166 | static boolean elf32_arm_discard_copies |
167 | PARAMS ((struct elf32_arm_link_hash_entry *, PTR)); | |
168 | ||
169 | /* Traverse an arm ELF linker hash table. */ | |
252b5132 RH |
170 | #define elf32_arm_link_hash_traverse(table, func, info) \ |
171 | (elf_link_hash_traverse \ | |
172 | (&(table)->root, \ | |
173 | (boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \ | |
174 | (info))) | |
175 | ||
176 | /* Get the ARM elf linker hash table from a link_info structure. */ | |
177 | #define elf32_arm_hash_table(info) \ | |
178 | ((struct elf32_arm_link_hash_table *) ((info)->hash)) | |
179 | ||
9b485d32 | 180 | /* ARM ELF linker hash table. */ |
252b5132 | 181 | struct elf32_arm_link_hash_table |
917583ad NC |
182 | { |
183 | /* The main hash table. */ | |
184 | struct elf_link_hash_table root; | |
252b5132 | 185 | |
917583ad | 186 | /* The size in bytes of the section containg the Thumb-to-ARM glue. */ |
dc810e39 | 187 | bfd_size_type thumb_glue_size; |
252b5132 | 188 | |
917583ad | 189 | /* The size in bytes of the section containg the ARM-to-Thumb glue. */ |
dc810e39 | 190 | bfd_size_type arm_glue_size; |
252b5132 | 191 | |
917583ad NC |
192 | /* An arbitary input BFD chosen to hold the glue sections. */ |
193 | bfd * bfd_of_glue_owner; | |
ba96a88f | 194 | |
917583ad NC |
195 | /* A boolean indicating whether knowledge of the ARM's pipeline |
196 | length should be applied by the linker. */ | |
197 | int no_pipeline_knowledge; | |
198 | }; | |
252b5132 | 199 | |
780a67af NC |
200 | /* Create an entry in an ARM ELF linker hash table. */ |
201 | ||
202 | static struct bfd_hash_entry * | |
203 | elf32_arm_link_hash_newfunc (entry, table, string) | |
204 | struct bfd_hash_entry * entry; | |
205 | struct bfd_hash_table * table; | |
206 | const char * string; | |
207 | { | |
208 | struct elf32_arm_link_hash_entry * ret = | |
209 | (struct elf32_arm_link_hash_entry *) entry; | |
210 | ||
211 | /* Allocate the structure if it has not already been allocated by a | |
212 | subclass. */ | |
213 | if (ret == (struct elf32_arm_link_hash_entry *) NULL) | |
214 | ret = ((struct elf32_arm_link_hash_entry *) | |
215 | bfd_hash_allocate (table, | |
216 | sizeof (struct elf32_arm_link_hash_entry))); | |
217 | if (ret == (struct elf32_arm_link_hash_entry *) NULL) | |
218 | return (struct bfd_hash_entry *) ret; | |
219 | ||
220 | /* Call the allocation method of the superclass. */ | |
221 | ret = ((struct elf32_arm_link_hash_entry *) | |
222 | _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, | |
223 | table, string)); | |
224 | if (ret != (struct elf32_arm_link_hash_entry *) NULL) | |
225 | ret->pcrel_relocs_copied = NULL; | |
226 | ||
227 | return (struct bfd_hash_entry *) ret; | |
228 | } | |
229 | ||
9b485d32 | 230 | /* Create an ARM elf linker hash table. */ |
252b5132 RH |
231 | |
232 | static struct bfd_link_hash_table * | |
233 | elf32_arm_link_hash_table_create (abfd) | |
234 | bfd *abfd; | |
235 | { | |
236 | struct elf32_arm_link_hash_table *ret; | |
dc810e39 | 237 | bfd_size_type amt = sizeof (struct elf32_arm_link_hash_table); |
252b5132 | 238 | |
e2d34d7d | 239 | ret = (struct elf32_arm_link_hash_table *) bfd_malloc (amt); |
252b5132 RH |
240 | if (ret == (struct elf32_arm_link_hash_table *) NULL) |
241 | return NULL; | |
242 | ||
243 | if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, | |
780a67af | 244 | elf32_arm_link_hash_newfunc)) |
252b5132 | 245 | { |
e2d34d7d | 246 | free (ret); |
252b5132 RH |
247 | return NULL; |
248 | } | |
249 | ||
250 | ret->thumb_glue_size = 0; | |
251 | ret->arm_glue_size = 0; | |
252 | ret->bfd_of_glue_owner = NULL; | |
ba96a88f | 253 | ret->no_pipeline_knowledge = 0; |
252b5132 RH |
254 | |
255 | return &ret->root.root; | |
256 | } | |
257 | ||
9b485d32 NC |
258 | /* Locate the Thumb encoded calling stub for NAME. */ |
259 | ||
252b5132 RH |
260 | static struct elf_link_hash_entry * |
261 | find_thumb_glue (link_info, name, input_bfd) | |
262 | struct bfd_link_info *link_info; | |
917583ad | 263 | const char *name; |
252b5132 RH |
264 | bfd *input_bfd; |
265 | { | |
266 | char *tmp_name; | |
267 | struct elf_link_hash_entry *hash; | |
268 | struct elf32_arm_link_hash_table *hash_table; | |
269 | ||
270 | /* We need a pointer to the armelf specific hash table. */ | |
271 | hash_table = elf32_arm_hash_table (link_info); | |
272 | ||
dc810e39 AM |
273 | tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name) |
274 | + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1); | |
252b5132 RH |
275 | |
276 | BFD_ASSERT (tmp_name); | |
277 | ||
278 | sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name); | |
279 | ||
280 | hash = elf_link_hash_lookup | |
281 | (&(hash_table)->root, tmp_name, false, false, true); | |
282 | ||
283 | if (hash == NULL) | |
284 | /* xgettext:c-format */ | |
8f615d07 AM |
285 | (*_bfd_error_handler) (_("%s: unable to find THUMB glue '%s' for `%s'"), |
286 | bfd_archive_filename (input_bfd), tmp_name, name); | |
252b5132 RH |
287 | |
288 | free (tmp_name); | |
289 | ||
290 | return hash; | |
291 | } | |
292 | ||
9b485d32 NC |
293 | /* Locate the ARM encoded calling stub for NAME. */ |
294 | ||
252b5132 RH |
295 | static struct elf_link_hash_entry * |
296 | find_arm_glue (link_info, name, input_bfd) | |
297 | struct bfd_link_info *link_info; | |
917583ad | 298 | const char *name; |
252b5132 RH |
299 | bfd *input_bfd; |
300 | { | |
301 | char *tmp_name; | |
302 | struct elf_link_hash_entry *myh; | |
303 | struct elf32_arm_link_hash_table *hash_table; | |
304 | ||
305 | /* We need a pointer to the elfarm specific hash table. */ | |
306 | hash_table = elf32_arm_hash_table (link_info); | |
307 | ||
dc810e39 AM |
308 | tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name) |
309 | + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1); | |
252b5132 RH |
310 | |
311 | BFD_ASSERT (tmp_name); | |
312 | ||
313 | sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name); | |
314 | ||
315 | myh = elf_link_hash_lookup | |
316 | (&(hash_table)->root, tmp_name, false, false, true); | |
317 | ||
318 | if (myh == NULL) | |
319 | /* xgettext:c-format */ | |
8f615d07 AM |
320 | (*_bfd_error_handler) (_("%s: unable to find ARM glue '%s' for `%s'"), |
321 | bfd_archive_filename (input_bfd), tmp_name, name); | |
252b5132 RH |
322 | |
323 | free (tmp_name); | |
324 | ||
325 | return myh; | |
326 | } | |
327 | ||
9b485d32 | 328 | /* ARM->Thumb glue: |
252b5132 RH |
329 | |
330 | .arm | |
331 | __func_from_arm: | |
332 | ldr r12, __func_addr | |
333 | bx r12 | |
334 | __func_addr: | |
9b485d32 | 335 | .word func @ behave as if you saw a ARM_32 reloc. */ |
252b5132 RH |
336 | |
337 | #define ARM2THUMB_GLUE_SIZE 12 | |
338 | static const insn32 a2t1_ldr_insn = 0xe59fc000; | |
339 | static const insn32 a2t2_bx_r12_insn = 0xe12fff1c; | |
340 | static const insn32 a2t3_func_addr_insn = 0x00000001; | |
341 | ||
9b485d32 | 342 | /* Thumb->ARM: Thumb->(non-interworking aware) ARM |
252b5132 RH |
343 | |
344 | .thumb .thumb | |
345 | .align 2 .align 2 | |
346 | __func_from_thumb: __func_from_thumb: | |
347 | bx pc push {r6, lr} | |
348 | nop ldr r6, __func_addr | |
349 | .arm mov lr, pc | |
350 | __func_change_to_arm: bx r6 | |
351 | b func .arm | |
352 | __func_back_to_thumb: | |
353 | ldmia r13! {r6, lr} | |
354 | bx lr | |
355 | __func_addr: | |
9b485d32 | 356 | .word func */ |
252b5132 RH |
357 | |
358 | #define THUMB2ARM_GLUE_SIZE 8 | |
359 | static const insn16 t2a1_bx_pc_insn = 0x4778; | |
360 | static const insn16 t2a2_noop_insn = 0x46c0; | |
361 | static const insn32 t2a3_b_insn = 0xea000000; | |
362 | ||
363 | static const insn16 t2a1_push_insn = 0xb540; | |
364 | static const insn16 t2a2_ldr_insn = 0x4e03; | |
365 | static const insn16 t2a3_mov_insn = 0x46fe; | |
366 | static const insn16 t2a4_bx_insn = 0x4730; | |
367 | static const insn32 t2a5_pop_insn = 0xe8bd4040; | |
368 | static const insn32 t2a6_bx_insn = 0xe12fff1e; | |
369 | ||
370 | boolean | |
371 | bfd_elf32_arm_allocate_interworking_sections (info) | |
372 | struct bfd_link_info * info; | |
373 | { | |
374 | asection * s; | |
375 | bfd_byte * foo; | |
376 | struct elf32_arm_link_hash_table * globals; | |
377 | ||
378 | globals = elf32_arm_hash_table (info); | |
379 | ||
380 | BFD_ASSERT (globals != NULL); | |
381 | ||
382 | if (globals->arm_glue_size != 0) | |
383 | { | |
384 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
385 | ||
dc810e39 AM |
386 | s = bfd_get_section_by_name (globals->bfd_of_glue_owner, |
387 | ARM2THUMB_GLUE_SECTION_NAME); | |
252b5132 RH |
388 | |
389 | BFD_ASSERT (s != NULL); | |
390 | ||
dc810e39 AM |
391 | foo = (bfd_byte *) bfd_alloc (globals->bfd_of_glue_owner, |
392 | globals->arm_glue_size); | |
252b5132 RH |
393 | |
394 | s->_raw_size = s->_cooked_size = globals->arm_glue_size; | |
395 | s->contents = foo; | |
396 | } | |
397 | ||
398 | if (globals->thumb_glue_size != 0) | |
399 | { | |
400 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
401 | ||
402 | s = bfd_get_section_by_name | |
403 | (globals->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME); | |
404 | ||
405 | BFD_ASSERT (s != NULL); | |
406 | ||
dc810e39 AM |
407 | foo = (bfd_byte *) bfd_alloc (globals->bfd_of_glue_owner, |
408 | globals->thumb_glue_size); | |
252b5132 RH |
409 | |
410 | s->_raw_size = s->_cooked_size = globals->thumb_glue_size; | |
411 | s->contents = foo; | |
412 | } | |
413 | ||
414 | return true; | |
415 | } | |
416 | ||
417 | static void | |
418 | record_arm_to_thumb_glue (link_info, h) | |
419 | struct bfd_link_info * link_info; | |
420 | struct elf_link_hash_entry * h; | |
421 | { | |
422 | const char * name = h->root.root.string; | |
63b0f745 | 423 | asection * s; |
252b5132 RH |
424 | char * tmp_name; |
425 | struct elf_link_hash_entry * myh; | |
426 | struct elf32_arm_link_hash_table * globals; | |
dc810e39 | 427 | bfd_vma val; |
252b5132 RH |
428 | |
429 | globals = elf32_arm_hash_table (link_info); | |
430 | ||
431 | BFD_ASSERT (globals != NULL); | |
432 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
433 | ||
434 | s = bfd_get_section_by_name | |
435 | (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME); | |
436 | ||
252b5132 RH |
437 | BFD_ASSERT (s != NULL); |
438 | ||
dc810e39 AM |
439 | tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name) |
440 | + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1); | |
252b5132 RH |
441 | |
442 | BFD_ASSERT (tmp_name); | |
443 | ||
444 | sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name); | |
445 | ||
446 | myh = elf_link_hash_lookup | |
447 | (&(globals)->root, tmp_name, false, false, true); | |
448 | ||
449 | if (myh != NULL) | |
450 | { | |
9b485d32 | 451 | /* We've already seen this guy. */ |
252b5132 | 452 | free (tmp_name); |
9b485d32 | 453 | return; |
252b5132 RH |
454 | } |
455 | ||
456 | /* The only trick here is using hash_table->arm_glue_size as the value. Even | |
457 | though the section isn't allocated yet, this is where we will be putting | |
458 | it. */ | |
dc810e39 AM |
459 | val = globals->arm_glue_size + 1; |
460 | _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner, | |
461 | tmp_name, BSF_GLOBAL, s, val, | |
252b5132 RH |
462 | NULL, true, false, |
463 | (struct bfd_link_hash_entry **) &myh); | |
464 | ||
465 | free (tmp_name); | |
466 | ||
467 | globals->arm_glue_size += ARM2THUMB_GLUE_SIZE; | |
468 | ||
469 | return; | |
470 | } | |
471 | ||
472 | static void | |
473 | record_thumb_to_arm_glue (link_info, h) | |
474 | struct bfd_link_info *link_info; | |
475 | struct elf_link_hash_entry *h; | |
476 | { | |
477 | const char *name = h->root.root.string; | |
63b0f745 | 478 | asection *s; |
252b5132 RH |
479 | char *tmp_name; |
480 | struct elf_link_hash_entry *myh; | |
481 | struct elf32_arm_link_hash_table *hash_table; | |
482 | char bind; | |
dc810e39 | 483 | bfd_vma val; |
252b5132 RH |
484 | |
485 | hash_table = elf32_arm_hash_table (link_info); | |
486 | ||
487 | BFD_ASSERT (hash_table != NULL); | |
488 | BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL); | |
489 | ||
490 | s = bfd_get_section_by_name | |
491 | (hash_table->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME); | |
492 | ||
493 | BFD_ASSERT (s != NULL); | |
494 | ||
dc810e39 AM |
495 | tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name) |
496 | + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1); | |
252b5132 RH |
497 | |
498 | BFD_ASSERT (tmp_name); | |
499 | ||
500 | sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name); | |
501 | ||
502 | myh = elf_link_hash_lookup | |
503 | (&(hash_table)->root, tmp_name, false, false, true); | |
504 | ||
505 | if (myh != NULL) | |
506 | { | |
9b485d32 | 507 | /* We've already seen this guy. */ |
252b5132 | 508 | free (tmp_name); |
9b485d32 | 509 | return; |
252b5132 RH |
510 | } |
511 | ||
dc810e39 AM |
512 | val = hash_table->thumb_glue_size + 1; |
513 | _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner, | |
514 | tmp_name, BSF_GLOBAL, s, val, | |
252b5132 RH |
515 | NULL, true, false, |
516 | (struct bfd_link_hash_entry **) &myh); | |
517 | ||
9b485d32 | 518 | /* If we mark it 'Thumb', the disassembler will do a better job. */ |
252b5132 RH |
519 | bind = ELF_ST_BIND (myh->type); |
520 | myh->type = ELF_ST_INFO (bind, STT_ARM_TFUNC); | |
521 | ||
522 | free (tmp_name); | |
523 | ||
252b5132 RH |
524 | #define CHANGE_TO_ARM "__%s_change_to_arm" |
525 | #define BACK_FROM_ARM "__%s_back_from_arm" | |
526 | ||
9b485d32 | 527 | /* Allocate another symbol to mark where we switch to Arm mode. */ |
dc810e39 AM |
528 | tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name) |
529 | + strlen (CHANGE_TO_ARM) + 1); | |
252b5132 RH |
530 | |
531 | BFD_ASSERT (tmp_name); | |
532 | ||
533 | sprintf (tmp_name, CHANGE_TO_ARM, name); | |
534 | ||
535 | myh = NULL; | |
536 | ||
dc810e39 AM |
537 | val = hash_table->thumb_glue_size + 4, |
538 | _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner, | |
539 | tmp_name, BSF_LOCAL, s, val, | |
252b5132 RH |
540 | NULL, true, false, |
541 | (struct bfd_link_hash_entry **) &myh); | |
542 | ||
543 | free (tmp_name); | |
544 | ||
545 | hash_table->thumb_glue_size += THUMB2ARM_GLUE_SIZE; | |
546 | ||
547 | return; | |
548 | } | |
549 | ||
550 | /* Select a BFD to be used to hold the sections used by the glue code. | |
551 | This function is called from the linker scripts in ld/emultempl/ | |
552 | {armelf/pe}.em */ | |
9b485d32 | 553 | |
252b5132 RH |
554 | boolean |
555 | bfd_elf32_arm_get_bfd_for_interworking (abfd, info) | |
556 | bfd *abfd; | |
557 | struct bfd_link_info *info; | |
558 | { | |
559 | struct elf32_arm_link_hash_table *globals; | |
560 | flagword flags; | |
561 | asection *sec; | |
562 | ||
563 | /* If we are only performing a partial link do not bother | |
564 | getting a bfd to hold the glue. */ | |
565 | if (info->relocateable) | |
566 | return true; | |
567 | ||
568 | globals = elf32_arm_hash_table (info); | |
569 | ||
570 | BFD_ASSERT (globals != NULL); | |
571 | ||
572 | if (globals->bfd_of_glue_owner != NULL) | |
573 | return true; | |
574 | ||
575 | sec = bfd_get_section_by_name (abfd, ARM2THUMB_GLUE_SECTION_NAME); | |
576 | ||
577 | if (sec == NULL) | |
578 | { | |
57db232e NC |
579 | /* Note: we do not include the flag SEC_LINKER_CREATED, as this |
580 | will prevent elf_link_input_bfd() from processing the contents | |
581 | of this section. */ | |
811b4bf6 | 582 | flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY; |
252b5132 RH |
583 | |
584 | sec = bfd_make_section (abfd, ARM2THUMB_GLUE_SECTION_NAME); | |
585 | ||
586 | if (sec == NULL | |
587 | || !bfd_set_section_flags (abfd, sec, flags) | |
588 | || !bfd_set_section_alignment (abfd, sec, 2)) | |
589 | return false; | |
9a5aca8c | 590 | |
57db232e NC |
591 | /* Set the gc mark to prevent the section from being removed by garbage |
592 | collection, despite the fact that no relocs refer to this section. */ | |
593 | sec->gc_mark = 1; | |
252b5132 RH |
594 | } |
595 | ||
596 | sec = bfd_get_section_by_name (abfd, THUMB2ARM_GLUE_SECTION_NAME); | |
597 | ||
598 | if (sec == NULL) | |
599 | { | |
811b4bf6 | 600 | flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY; |
252b5132 RH |
601 | |
602 | sec = bfd_make_section (abfd, THUMB2ARM_GLUE_SECTION_NAME); | |
603 | ||
604 | if (sec == NULL | |
605 | || !bfd_set_section_flags (abfd, sec, flags) | |
606 | || !bfd_set_section_alignment (abfd, sec, 2)) | |
607 | return false; | |
9a5aca8c | 608 | |
57db232e | 609 | sec->gc_mark = 1; |
252b5132 RH |
610 | } |
611 | ||
612 | /* Save the bfd for later use. */ | |
613 | globals->bfd_of_glue_owner = abfd; | |
614 | ||
615 | return true; | |
616 | } | |
617 | ||
618 | boolean | |
ba96a88f | 619 | bfd_elf32_arm_process_before_allocation (abfd, link_info, no_pipeline_knowledge) |
252b5132 RH |
620 | bfd *abfd; |
621 | struct bfd_link_info *link_info; | |
ba96a88f | 622 | int no_pipeline_knowledge; |
252b5132 RH |
623 | { |
624 | Elf_Internal_Shdr *symtab_hdr; | |
625 | Elf_Internal_Rela *free_relocs = NULL; | |
626 | Elf_Internal_Rela *irel, *irelend; | |
627 | bfd_byte *contents = NULL; | |
628 | bfd_byte *free_contents = NULL; | |
629 | Elf32_External_Sym *extsyms = NULL; | |
630 | Elf32_External_Sym *free_extsyms = NULL; | |
631 | ||
632 | asection *sec; | |
633 | struct elf32_arm_link_hash_table *globals; | |
634 | ||
635 | /* If we are only performing a partial link do not bother | |
636 | to construct any glue. */ | |
637 | if (link_info->relocateable) | |
638 | return true; | |
639 | ||
640 | /* Here we have a bfd that is to be included on the link. We have a hook | |
641 | to do reloc rummaging, before section sizes are nailed down. */ | |
252b5132 RH |
642 | globals = elf32_arm_hash_table (link_info); |
643 | ||
644 | BFD_ASSERT (globals != NULL); | |
645 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
646 | ||
ba96a88f | 647 | globals->no_pipeline_knowledge = no_pipeline_knowledge; |
f21f3fe0 | 648 | |
252b5132 RH |
649 | /* Rummage around all the relocs and map the glue vectors. */ |
650 | sec = abfd->sections; | |
651 | ||
652 | if (sec == NULL) | |
653 | return true; | |
654 | ||
655 | for (; sec != NULL; sec = sec->next) | |
656 | { | |
657 | if (sec->reloc_count == 0) | |
658 | continue; | |
659 | ||
660 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
252b5132 | 661 | |
9b485d32 | 662 | /* Load the relocs. */ |
252b5132 | 663 | irel = (_bfd_elf32_link_read_relocs (abfd, sec, (PTR) NULL, |
dc810e39 | 664 | (Elf_Internal_Rela *) NULL, false)); |
252b5132 RH |
665 | |
666 | BFD_ASSERT (irel != 0); | |
667 | ||
668 | irelend = irel + sec->reloc_count; | |
669 | for (; irel < irelend; irel++) | |
670 | { | |
671 | long r_type; | |
672 | unsigned long r_index; | |
252b5132 RH |
673 | |
674 | struct elf_link_hash_entry *h; | |
675 | ||
676 | r_type = ELF32_R_TYPE (irel->r_info); | |
677 | r_index = ELF32_R_SYM (irel->r_info); | |
678 | ||
9b485d32 | 679 | /* These are the only relocation types we care about. */ |
ba96a88f | 680 | if ( r_type != R_ARM_PC24 |
252b5132 RH |
681 | && r_type != R_ARM_THM_PC22) |
682 | continue; | |
683 | ||
684 | /* Get the section contents if we haven't done so already. */ | |
685 | if (contents == NULL) | |
686 | { | |
687 | /* Get cached copy if it exists. */ | |
688 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
689 | contents = elf_section_data (sec)->this_hdr.contents; | |
690 | else | |
691 | { | |
692 | /* Go get them off disk. */ | |
693 | contents = (bfd_byte *) bfd_malloc (sec->_raw_size); | |
694 | if (contents == NULL) | |
695 | goto error_return; | |
9b485d32 | 696 | |
252b5132 RH |
697 | free_contents = contents; |
698 | ||
699 | if (!bfd_get_section_contents (abfd, sec, contents, | |
dc810e39 | 700 | (file_ptr) 0, sec->_raw_size)) |
252b5132 RH |
701 | goto error_return; |
702 | } | |
703 | } | |
704 | ||
705 | /* Read this BFD's symbols if we haven't done so already. */ | |
706 | if (extsyms == NULL) | |
707 | { | |
708 | /* Get cached copy if it exists. */ | |
709 | if (symtab_hdr->contents != NULL) | |
710 | extsyms = (Elf32_External_Sym *) symtab_hdr->contents; | |
711 | else | |
712 | { | |
713 | /* Go get them off disk. */ | |
714 | extsyms = ((Elf32_External_Sym *) | |
715 | bfd_malloc (symtab_hdr->sh_size)); | |
716 | if (extsyms == NULL) | |
717 | goto error_return; | |
9b485d32 | 718 | |
252b5132 | 719 | free_extsyms = extsyms; |
9b485d32 | 720 | |
252b5132 | 721 | if (bfd_seek (abfd, symtab_hdr->sh_offset, SEEK_SET) != 0 |
dc810e39 | 722 | || (bfd_bread (extsyms, symtab_hdr->sh_size, abfd) |
252b5132 RH |
723 | != symtab_hdr->sh_size)) |
724 | goto error_return; | |
725 | } | |
726 | } | |
727 | ||
a7c10850 | 728 | /* If the relocation is not against a symbol it cannot concern us. */ |
252b5132 RH |
729 | h = NULL; |
730 | ||
9b485d32 | 731 | /* We don't care about local symbols. */ |
252b5132 RH |
732 | if (r_index < symtab_hdr->sh_info) |
733 | continue; | |
734 | ||
9b485d32 | 735 | /* This is an external symbol. */ |
252b5132 RH |
736 | r_index -= symtab_hdr->sh_info; |
737 | h = (struct elf_link_hash_entry *) | |
738 | elf_sym_hashes (abfd)[r_index]; | |
739 | ||
740 | /* If the relocation is against a static symbol it must be within | |
741 | the current section and so cannot be a cross ARM/Thumb relocation. */ | |
742 | if (h == NULL) | |
743 | continue; | |
744 | ||
745 | switch (r_type) | |
746 | { | |
747 | case R_ARM_PC24: | |
748 | /* This one is a call from arm code. We need to look up | |
2f0ca46a | 749 | the target of the call. If it is a thumb target, we |
252b5132 | 750 | insert glue. */ |
252b5132 RH |
751 | if (ELF_ST_TYPE(h->type) == STT_ARM_TFUNC) |
752 | record_arm_to_thumb_glue (link_info, h); | |
753 | break; | |
754 | ||
755 | case R_ARM_THM_PC22: | |
f21f3fe0 | 756 | /* This one is a call from thumb code. We look |
2f0ca46a | 757 | up the target of the call. If it is not a thumb |
bcbdc74c | 758 | target, we insert glue. */ |
252b5132 RH |
759 | if (ELF_ST_TYPE (h->type) != STT_ARM_TFUNC) |
760 | record_thumb_to_arm_glue (link_info, h); | |
761 | break; | |
762 | ||
763 | default: | |
764 | break; | |
765 | } | |
766 | } | |
767 | } | |
768 | ||
769 | return true; | |
9a5aca8c | 770 | |
252b5132 RH |
771 | error_return: |
772 | if (free_relocs != NULL) | |
773 | free (free_relocs); | |
774 | if (free_contents != NULL) | |
775 | free (free_contents); | |
776 | if (free_extsyms != NULL) | |
777 | free (free_extsyms); | |
9a5aca8c | 778 | |
252b5132 | 779 | return false; |
252b5132 RH |
780 | } |
781 | ||
782 | /* The thumb form of a long branch is a bit finicky, because the offset | |
783 | encoding is split over two fields, each in it's own instruction. They | |
f21f3fe0 | 784 | can occur in any order. So given a thumb form of long branch, and an |
252b5132 | 785 | offset, insert the offset into the thumb branch and return finished |
f21f3fe0 | 786 | instruction. |
252b5132 | 787 | |
f21f3fe0 | 788 | It takes two thumb instructions to encode the target address. Each has |
252b5132 | 789 | 11 bits to invest. The upper 11 bits are stored in one (identifed by |
f21f3fe0 UD |
790 | H-0.. see below), the lower 11 bits are stored in the other (identified |
791 | by H-1). | |
252b5132 | 792 | |
f21f3fe0 | 793 | Combine together and shifted left by 1 (it's a half word address) and |
252b5132 RH |
794 | there you have it. |
795 | ||
796 | Op: 1111 = F, | |
797 | H-0, upper address-0 = 000 | |
798 | Op: 1111 = F, | |
799 | H-1, lower address-0 = 800 | |
800 | ||
f21f3fe0 | 801 | They can be ordered either way, but the arm tools I've seen always put |
252b5132 RH |
802 | the lower one first. It probably doesn't matter. krk@cygnus.com |
803 | ||
804 | XXX: Actually the order does matter. The second instruction (H-1) | |
805 | moves the computed address into the PC, so it must be the second one | |
806 | in the sequence. The problem, however is that whilst little endian code | |
807 | stores the instructions in HI then LOW order, big endian code does the | |
dfc5f959 | 808 | reverse. nickc@cygnus.com. */ |
252b5132 | 809 | |
dfc5f959 NC |
810 | #define LOW_HI_ORDER 0xF800F000 |
811 | #define HI_LOW_ORDER 0xF000F800 | |
252b5132 RH |
812 | |
813 | static insn32 | |
814 | insert_thumb_branch (br_insn, rel_off) | |
815 | insn32 br_insn; | |
816 | int rel_off; | |
817 | { | |
818 | unsigned int low_bits; | |
819 | unsigned int high_bits; | |
820 | ||
252b5132 RH |
821 | BFD_ASSERT ((rel_off & 1) != 1); |
822 | ||
dfc5f959 NC |
823 | rel_off >>= 1; /* Half word aligned address. */ |
824 | low_bits = rel_off & 0x000007FF; /* The bottom 11 bits. */ | |
825 | high_bits = (rel_off >> 11) & 0x000007FF; /* The top 11 bits. */ | |
252b5132 RH |
826 | |
827 | if ((br_insn & LOW_HI_ORDER) == LOW_HI_ORDER) | |
828 | br_insn = LOW_HI_ORDER | (low_bits << 16) | high_bits; | |
829 | else if ((br_insn & HI_LOW_ORDER) == HI_LOW_ORDER) | |
830 | br_insn = HI_LOW_ORDER | (high_bits << 16) | low_bits; | |
831 | else | |
9b485d32 NC |
832 | /* FIXME: abort is probably not the right call. krk@cygnus.com */ |
833 | abort (); /* error - not a valid branch instruction form. */ | |
252b5132 | 834 | |
252b5132 RH |
835 | return br_insn; |
836 | } | |
837 | ||
9b485d32 NC |
838 | /* Thumb code calling an ARM function. */ |
839 | ||
252b5132 RH |
840 | static int |
841 | elf32_thumb_to_arm_stub (info, name, input_bfd, output_bfd, input_section, | |
842 | hit_data, sym_sec, offset, addend, val) | |
bcbdc74c NC |
843 | struct bfd_link_info * info; |
844 | const char * name; | |
845 | bfd * input_bfd; | |
846 | bfd * output_bfd; | |
847 | asection * input_section; | |
848 | bfd_byte * hit_data; | |
849 | asection * sym_sec; | |
850 | bfd_vma offset; | |
851 | bfd_signed_vma addend; | |
852 | bfd_vma val; | |
252b5132 | 853 | { |
bcbdc74c | 854 | asection * s = 0; |
dc810e39 | 855 | bfd_vma my_offset; |
252b5132 RH |
856 | unsigned long int tmp; |
857 | long int ret_offset; | |
bcbdc74c NC |
858 | struct elf_link_hash_entry * myh; |
859 | struct elf32_arm_link_hash_table * globals; | |
252b5132 RH |
860 | |
861 | myh = find_thumb_glue (info, name, input_bfd); | |
862 | if (myh == NULL) | |
863 | return false; | |
864 | ||
865 | globals = elf32_arm_hash_table (info); | |
866 | ||
867 | BFD_ASSERT (globals != NULL); | |
868 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
869 | ||
870 | my_offset = myh->root.u.def.value; | |
871 | ||
872 | s = bfd_get_section_by_name (globals->bfd_of_glue_owner, | |
873 | THUMB2ARM_GLUE_SECTION_NAME); | |
874 | ||
875 | BFD_ASSERT (s != NULL); | |
876 | BFD_ASSERT (s->contents != NULL); | |
877 | BFD_ASSERT (s->output_section != NULL); | |
878 | ||
879 | if ((my_offset & 0x01) == 0x01) | |
880 | { | |
881 | if (sym_sec != NULL | |
882 | && sym_sec->owner != NULL | |
883 | && !INTERWORK_FLAG (sym_sec->owner)) | |
884 | { | |
8f615d07 | 885 | (*_bfd_error_handler) |
9b485d32 | 886 | (_("%s(%s): warning: interworking not enabled."), |
8f615d07 AM |
887 | bfd_archive_filename (sym_sec->owner), name); |
888 | (*_bfd_error_handler) | |
9b485d32 | 889 | (_(" first occurrence: %s: thumb call to arm"), |
8f615d07 | 890 | bfd_archive_filename (input_bfd)); |
252b5132 RH |
891 | |
892 | return false; | |
893 | } | |
894 | ||
895 | --my_offset; | |
896 | myh->root.u.def.value = my_offset; | |
897 | ||
dc810e39 | 898 | bfd_put_16 (output_bfd, (bfd_vma) t2a1_bx_pc_insn, |
252b5132 RH |
899 | s->contents + my_offset); |
900 | ||
dc810e39 | 901 | bfd_put_16 (output_bfd, (bfd_vma) t2a2_noop_insn, |
252b5132 RH |
902 | s->contents + my_offset + 2); |
903 | ||
904 | ret_offset = | |
9b485d32 NC |
905 | /* Address of destination of the stub. */ |
906 | ((bfd_signed_vma) val) | |
252b5132 | 907 | - ((bfd_signed_vma) |
9b485d32 NC |
908 | /* Offset from the start of the current section to the start of the stubs. */ |
909 | (s->output_offset | |
910 | /* Offset of the start of this stub from the start of the stubs. */ | |
911 | + my_offset | |
912 | /* Address of the start of the current section. */ | |
913 | + s->output_section->vma) | |
914 | /* The branch instruction is 4 bytes into the stub. */ | |
915 | + 4 | |
916 | /* ARM branches work from the pc of the instruction + 8. */ | |
917 | + 8); | |
252b5132 RH |
918 | |
919 | bfd_put_32 (output_bfd, | |
dc810e39 | 920 | (bfd_vma) t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF), |
252b5132 RH |
921 | s->contents + my_offset + 4); |
922 | } | |
923 | ||
924 | BFD_ASSERT (my_offset <= globals->thumb_glue_size); | |
925 | ||
926 | /* Now go back and fix up the original BL insn to point | |
927 | to here. */ | |
dc810e39 AM |
928 | ret_offset = (s->output_offset |
929 | + my_offset | |
930 | - (input_section->output_offset | |
931 | + offset + addend) | |
932 | - 8); | |
252b5132 RH |
933 | |
934 | tmp = bfd_get_32 (input_bfd, hit_data | |
935 | - input_section->vma); | |
936 | ||
937 | bfd_put_32 (output_bfd, | |
dc810e39 | 938 | (bfd_vma) insert_thumb_branch (tmp, ret_offset), |
252b5132 RH |
939 | hit_data - input_section->vma); |
940 | ||
941 | return true; | |
942 | } | |
943 | ||
9b485d32 NC |
944 | /* Arm code calling a Thumb function. */ |
945 | ||
252b5132 RH |
946 | static int |
947 | elf32_arm_to_thumb_stub (info, name, input_bfd, output_bfd, input_section, | |
948 | hit_data, sym_sec, offset, addend, val) | |
bcbdc74c NC |
949 | struct bfd_link_info * info; |
950 | const char * name; | |
951 | bfd * input_bfd; | |
952 | bfd * output_bfd; | |
953 | asection * input_section; | |
954 | bfd_byte * hit_data; | |
955 | asection * sym_sec; | |
956 | bfd_vma offset; | |
957 | bfd_signed_vma addend; | |
958 | bfd_vma val; | |
252b5132 RH |
959 | { |
960 | unsigned long int tmp; | |
dc810e39 | 961 | bfd_vma my_offset; |
bcbdc74c | 962 | asection * s; |
252b5132 | 963 | long int ret_offset; |
bcbdc74c NC |
964 | struct elf_link_hash_entry * myh; |
965 | struct elf32_arm_link_hash_table * globals; | |
252b5132 RH |
966 | |
967 | myh = find_arm_glue (info, name, input_bfd); | |
968 | if (myh == NULL) | |
969 | return false; | |
970 | ||
971 | globals = elf32_arm_hash_table (info); | |
972 | ||
973 | BFD_ASSERT (globals != NULL); | |
974 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
975 | ||
976 | my_offset = myh->root.u.def.value; | |
977 | s = bfd_get_section_by_name (globals->bfd_of_glue_owner, | |
978 | ARM2THUMB_GLUE_SECTION_NAME); | |
979 | BFD_ASSERT (s != NULL); | |
980 | BFD_ASSERT (s->contents != NULL); | |
981 | BFD_ASSERT (s->output_section != NULL); | |
982 | ||
983 | if ((my_offset & 0x01) == 0x01) | |
984 | { | |
985 | if (sym_sec != NULL | |
986 | && sym_sec->owner != NULL | |
987 | && !INTERWORK_FLAG (sym_sec->owner)) | |
988 | { | |
8f615d07 | 989 | (*_bfd_error_handler) |
9b485d32 | 990 | (_("%s(%s): warning: interworking not enabled."), |
8f615d07 AM |
991 | bfd_archive_filename (sym_sec->owner), name); |
992 | (*_bfd_error_handler) | |
9b485d32 | 993 | (_(" first occurrence: %s: arm call to thumb"), |
8f615d07 | 994 | bfd_archive_filename (input_bfd)); |
252b5132 | 995 | } |
9b485d32 | 996 | |
252b5132 RH |
997 | --my_offset; |
998 | myh->root.u.def.value = my_offset; | |
999 | ||
dc810e39 | 1000 | bfd_put_32 (output_bfd, (bfd_vma) a2t1_ldr_insn, |
252b5132 RH |
1001 | s->contents + my_offset); |
1002 | ||
dc810e39 | 1003 | bfd_put_32 (output_bfd, (bfd_vma) a2t2_bx_r12_insn, |
252b5132 RH |
1004 | s->contents + my_offset + 4); |
1005 | ||
1006 | /* It's a thumb address. Add the low order bit. */ | |
1007 | bfd_put_32 (output_bfd, val | a2t3_func_addr_insn, | |
1008 | s->contents + my_offset + 8); | |
1009 | } | |
1010 | ||
1011 | BFD_ASSERT (my_offset <= globals->arm_glue_size); | |
1012 | ||
1013 | tmp = bfd_get_32 (input_bfd, hit_data); | |
1014 | tmp = tmp & 0xFF000000; | |
1015 | ||
9b485d32 | 1016 | /* Somehow these are both 4 too far, so subtract 8. */ |
dc810e39 AM |
1017 | ret_offset = (s->output_offset |
1018 | + my_offset | |
1019 | + s->output_section->vma | |
1020 | - (input_section->output_offset | |
1021 | + input_section->output_section->vma | |
1022 | + offset + addend) | |
1023 | - 8); | |
9a5aca8c | 1024 | |
252b5132 RH |
1025 | tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF); |
1026 | ||
dc810e39 | 1027 | bfd_put_32 (output_bfd, (bfd_vma) tmp, hit_data - input_section->vma); |
252b5132 | 1028 | |
252b5132 RH |
1029 | return true; |
1030 | } | |
1031 | ||
1032 | /* Perform a relocation as part of a final link. */ | |
9b485d32 | 1033 | |
252b5132 RH |
1034 | static bfd_reloc_status_type |
1035 | elf32_arm_final_link_relocate (howto, input_bfd, output_bfd, | |
1036 | input_section, contents, rel, value, | |
780a67af | 1037 | info, sym_sec, sym_name, sym_flags, h) |
252b5132 RH |
1038 | reloc_howto_type * howto; |
1039 | bfd * input_bfd; | |
1040 | bfd * output_bfd; | |
1041 | asection * input_section; | |
1042 | bfd_byte * contents; | |
1043 | Elf_Internal_Rela * rel; | |
1044 | bfd_vma value; | |
1045 | struct bfd_link_info * info; | |
1046 | asection * sym_sec; | |
1047 | const char * sym_name; | |
dc810e39 | 1048 | int sym_flags; |
780a67af | 1049 | struct elf_link_hash_entry * h; |
252b5132 RH |
1050 | { |
1051 | unsigned long r_type = howto->type; | |
1052 | unsigned long r_symndx; | |
1053 | bfd_byte * hit_data = contents + rel->r_offset; | |
1054 | bfd * dynobj = NULL; | |
1055 | Elf_Internal_Shdr * symtab_hdr; | |
1056 | struct elf_link_hash_entry ** sym_hashes; | |
1057 | bfd_vma * local_got_offsets; | |
1058 | asection * sgot = NULL; | |
1059 | asection * splt = NULL; | |
1060 | asection * sreloc = NULL; | |
252b5132 | 1061 | bfd_vma addend; |
ba96a88f NC |
1062 | bfd_signed_vma signed_addend; |
1063 | struct elf32_arm_link_hash_table * globals; | |
f21f3fe0 | 1064 | |
cac15327 NC |
1065 | /* If the start address has been set, then set the EF_ARM_HASENTRY |
1066 | flag. Setting this more than once is redundant, but the cost is | |
1067 | not too high, and it keeps the code simple. | |
99e4ae17 | 1068 | |
cac15327 NC |
1069 | The test is done here, rather than somewhere else, because the |
1070 | start address is only set just before the final link commences. | |
1071 | ||
1072 | Note - if the user deliberately sets a start address of 0, the | |
1073 | flag will not be set. */ | |
1074 | if (bfd_get_start_address (output_bfd) != 0) | |
1075 | elf_elfheader (output_bfd)->e_flags |= EF_ARM_HASENTRY; | |
99e4ae17 | 1076 | |
ba96a88f | 1077 | globals = elf32_arm_hash_table (info); |
f21f3fe0 | 1078 | |
252b5132 RH |
1079 | dynobj = elf_hash_table (info)->dynobj; |
1080 | if (dynobj) | |
1081 | { | |
1082 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
1083 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
1084 | } | |
1085 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; | |
1086 | sym_hashes = elf_sym_hashes (input_bfd); | |
1087 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
1088 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1089 | ||
1090 | #ifdef USE_REL | |
ba96a88f NC |
1091 | addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask; |
1092 | ||
1093 | if (addend & ((howto->src_mask + 1) >> 1)) | |
1094 | { | |
1095 | signed_addend = -1; | |
1096 | signed_addend &= ~ howto->src_mask; | |
1097 | signed_addend |= addend; | |
1098 | } | |
1099 | else | |
1100 | signed_addend = addend; | |
252b5132 | 1101 | #else |
ba96a88f | 1102 | addend = signed_addend = rel->r_addend; |
252b5132 | 1103 | #endif |
f21f3fe0 | 1104 | |
252b5132 RH |
1105 | switch (r_type) |
1106 | { | |
1107 | case R_ARM_NONE: | |
1108 | return bfd_reloc_ok; | |
1109 | ||
1110 | case R_ARM_PC24: | |
1111 | case R_ARM_ABS32: | |
1112 | case R_ARM_REL32: | |
dfc5f959 NC |
1113 | #ifndef OLD_ARM_ABI |
1114 | case R_ARM_XPC25: | |
1115 | #endif | |
252b5132 | 1116 | /* When generating a shared object, these relocations are copied |
9b485d32 | 1117 | into the output file to be resolved at run time. */ |
252b5132 | 1118 | if (info->shared |
ec338859 | 1119 | && r_symndx != 0 |
252b5132 | 1120 | && (r_type != R_ARM_PC24 |
99e4ae17 | 1121 | || (h != NULL |
252b5132 RH |
1122 | && h->dynindx != -1 |
1123 | && (! info->symbolic | |
1124 | || (h->elf_link_hash_flags | |
1125 | & ELF_LINK_HASH_DEF_REGULAR) == 0)))) | |
1126 | { | |
1127 | Elf_Internal_Rel outrel; | |
1128 | boolean skip, relocate; | |
f21f3fe0 | 1129 | |
252b5132 RH |
1130 | if (sreloc == NULL) |
1131 | { | |
1132 | const char * name; | |
f21f3fe0 | 1133 | |
252b5132 RH |
1134 | name = (bfd_elf_string_from_elf_section |
1135 | (input_bfd, | |
1136 | elf_elfheader (input_bfd)->e_shstrndx, | |
1137 | elf_section_data (input_section)->rel_hdr.sh_name)); | |
1138 | if (name == NULL) | |
1139 | return bfd_reloc_notsupported; | |
f21f3fe0 | 1140 | |
252b5132 RH |
1141 | BFD_ASSERT (strncmp (name, ".rel", 4) == 0 |
1142 | && strcmp (bfd_get_section_name (input_bfd, | |
1143 | input_section), | |
1144 | name + 4) == 0); | |
f21f3fe0 | 1145 | |
252b5132 RH |
1146 | sreloc = bfd_get_section_by_name (dynobj, name); |
1147 | BFD_ASSERT (sreloc != NULL); | |
1148 | } | |
f21f3fe0 | 1149 | |
252b5132 | 1150 | skip = false; |
0bb2d96a | 1151 | relocate = false; |
f21f3fe0 | 1152 | |
c629eae0 JJ |
1153 | outrel.r_offset = |
1154 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
1155 | rel->r_offset); | |
1156 | if (outrel.r_offset == (bfd_vma) -1) | |
1157 | skip = true; | |
0bb2d96a JJ |
1158 | else if (outrel.r_offset == (bfd_vma) -2) |
1159 | skip = true, relocate = true; | |
252b5132 RH |
1160 | outrel.r_offset += (input_section->output_section->vma |
1161 | + input_section->output_offset); | |
f21f3fe0 | 1162 | |
252b5132 | 1163 | if (skip) |
0bb2d96a | 1164 | memset (&outrel, 0, sizeof outrel); |
252b5132 RH |
1165 | else if (r_type == R_ARM_PC24) |
1166 | { | |
1167 | BFD_ASSERT (h != NULL && h->dynindx != -1); | |
0bb2d96a | 1168 | if ((input_section->flags & SEC_ALLOC) == 0) |
252b5132 RH |
1169 | relocate = true; |
1170 | outrel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_PC24); | |
1171 | } | |
1172 | else | |
1173 | { | |
1174 | if (h == NULL | |
1175 | || ((info->symbolic || h->dynindx == -1) | |
1176 | && (h->elf_link_hash_flags | |
1177 | & ELF_LINK_HASH_DEF_REGULAR) != 0)) | |
1178 | { | |
1179 | relocate = true; | |
1180 | outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE); | |
1181 | } | |
1182 | else | |
1183 | { | |
1184 | BFD_ASSERT (h->dynindx != -1); | |
0bb2d96a | 1185 | if ((input_section->flags & SEC_ALLOC) == 0) |
252b5132 RH |
1186 | relocate = true; |
1187 | outrel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_ABS32); | |
1188 | } | |
1189 | } | |
f21f3fe0 | 1190 | |
252b5132 RH |
1191 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, |
1192 | (((Elf32_External_Rel *) | |
1193 | sreloc->contents) | |
1194 | + sreloc->reloc_count)); | |
1195 | ++sreloc->reloc_count; | |
9a5aca8c | 1196 | |
f21f3fe0 | 1197 | /* If this reloc is against an external symbol, we do not want to |
252b5132 | 1198 | fiddle with the addend. Otherwise, we need to include the symbol |
9b485d32 | 1199 | value so that it becomes an addend for the dynamic reloc. */ |
252b5132 RH |
1200 | if (! relocate) |
1201 | return bfd_reloc_ok; | |
9a5aca8c | 1202 | |
f21f3fe0 | 1203 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
252b5132 RH |
1204 | contents, rel->r_offset, value, |
1205 | (bfd_vma) 0); | |
1206 | } | |
1207 | else switch (r_type) | |
1208 | { | |
dfc5f959 NC |
1209 | #ifndef OLD_ARM_ABI |
1210 | case R_ARM_XPC25: /* Arm BLX instruction. */ | |
1211 | #endif | |
1212 | case R_ARM_PC24: /* Arm B/BL instruction */ | |
1213 | #ifndef OLD_ARM_ABI | |
1214 | if (r_type == R_ARM_XPC25) | |
252b5132 | 1215 | { |
dfc5f959 NC |
1216 | /* Check for Arm calling Arm function. */ |
1217 | /* FIXME: Should we translate the instruction into a BL | |
1218 | instruction instead ? */ | |
1219 | if (sym_flags != STT_ARM_TFUNC) | |
8f615d07 | 1220 | (*_bfd_error_handler) (_("\ |
dfc5f959 | 1221 | %s: Warning: Arm BLX instruction targets Arm function '%s'."), |
8f615d07 AM |
1222 | bfd_archive_filename (input_bfd), |
1223 | h ? h->root.root.string : "(local)"); | |
dfc5f959 NC |
1224 | } |
1225 | else | |
1226 | #endif | |
1227 | { | |
1228 | /* Check for Arm calling Thumb function. */ | |
1229 | if (sym_flags == STT_ARM_TFUNC) | |
1230 | { | |
1231 | elf32_arm_to_thumb_stub (info, sym_name, input_bfd, output_bfd, | |
1232 | input_section, hit_data, sym_sec, rel->r_offset, | |
1233 | signed_addend, value); | |
1234 | return bfd_reloc_ok; | |
1235 | } | |
252b5132 | 1236 | } |
ba96a88f NC |
1237 | |
1238 | if ( strcmp (bfd_get_target (input_bfd), "elf32-littlearm-oabi") == 0 | |
1239 | || strcmp (bfd_get_target (input_bfd), "elf32-bigarm-oabi") == 0) | |
1240 | { | |
1241 | /* The old way of doing things. Trearing the addend as a | |
1242 | byte sized field and adding in the pipeline offset. */ | |
ba96a88f NC |
1243 | value -= (input_section->output_section->vma |
1244 | + input_section->output_offset); | |
1245 | value -= rel->r_offset; | |
1246 | value += addend; | |
f21f3fe0 | 1247 | |
ba96a88f NC |
1248 | if (! globals->no_pipeline_knowledge) |
1249 | value -= 8; | |
1250 | } | |
1251 | else | |
1252 | { | |
1253 | /* The ARM ELF ABI says that this reloc is computed as: S - P + A | |
1254 | where: | |
1255 | S is the address of the symbol in the relocation. | |
1256 | P is address of the instruction being relocated. | |
1257 | A is the addend (extracted from the instruction) in bytes. | |
f21f3fe0 | 1258 | |
ba96a88f NC |
1259 | S is held in 'value'. |
1260 | P is the base address of the section containing the instruction | |
1261 | plus the offset of the reloc into that section, ie: | |
1262 | (input_section->output_section->vma + | |
1263 | input_section->output_offset + | |
1264 | rel->r_offset). | |
1265 | A is the addend, converted into bytes, ie: | |
1266 | (signed_addend * 4) | |
1267 | ||
1268 | Note: None of these operations have knowledge of the pipeline | |
1269 | size of the processor, thus it is up to the assembler to encode | |
1270 | this information into the addend. */ | |
ba96a88f NC |
1271 | value -= (input_section->output_section->vma |
1272 | + input_section->output_offset); | |
1273 | value -= rel->r_offset; | |
1274 | value += (signed_addend << howto->size); | |
f21f3fe0 | 1275 | |
ba96a88f NC |
1276 | /* Previous versions of this code also used to add in the pipeline |
1277 | offset here. This is wrong because the linker is not supposed | |
1278 | to know about such things, and one day it might change. In order | |
1279 | to support old binaries that need the old behaviour however, so | |
1280 | we attempt to detect which ABI was used to create the reloc. */ | |
1281 | if (! globals->no_pipeline_knowledge) | |
f21f3fe0 | 1282 | { |
ba96a88f | 1283 | Elf_Internal_Ehdr * i_ehdrp; /* Elf file header, internal form */ |
f21f3fe0 | 1284 | |
ba96a88f | 1285 | i_ehdrp = elf_elfheader (input_bfd); |
f21f3fe0 | 1286 | |
ba96a88f NC |
1287 | if (i_ehdrp->e_ident[EI_OSABI] == 0) |
1288 | value -= 8; | |
1289 | } | |
1290 | } | |
23080146 | 1291 | |
dcb5e6e6 NC |
1292 | signed_addend = value; |
1293 | signed_addend >>= howto->rightshift; | |
9a5aca8c | 1294 | |
59f2c4e7 NC |
1295 | /* It is not an error for an undefined weak reference to be |
1296 | out of range. Any program that branches to such a symbol | |
9a5aca8c AM |
1297 | is going to crash anyway, so there is no point worrying |
1298 | about getting the destination exactly right. */ | |
59f2c4e7 NC |
1299 | if (! h || h->root.type != bfd_link_hash_undefweak) |
1300 | { | |
9b485d32 | 1301 | /* Perform a signed range check. */ |
dcb5e6e6 | 1302 | if ( signed_addend > ((bfd_signed_vma) (howto->dst_mask >> 1)) |
59f2c4e7 NC |
1303 | || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1))) |
1304 | return bfd_reloc_overflow; | |
1305 | } | |
9a5aca8c | 1306 | |
dcb5e6e6 NC |
1307 | #ifndef OLD_ARM_ABI |
1308 | /* If necessary set the H bit in the BLX instruction. */ | |
1309 | if (r_type == R_ARM_XPC25 && ((value & 2) == 2)) | |
1310 | value = (signed_addend & howto->dst_mask) | |
1311 | | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask)) | |
1312 | | (1 << 24); | |
1313 | else | |
1314 | #endif | |
1315 | value = (signed_addend & howto->dst_mask) | |
1316 | | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask)); | |
252b5132 | 1317 | break; |
f21f3fe0 | 1318 | |
252b5132 RH |
1319 | case R_ARM_ABS32: |
1320 | value += addend; | |
1321 | if (sym_flags == STT_ARM_TFUNC) | |
1322 | value |= 1; | |
1323 | break; | |
f21f3fe0 | 1324 | |
252b5132 RH |
1325 | case R_ARM_REL32: |
1326 | value -= (input_section->output_section->vma | |
62efb346 | 1327 | + input_section->output_offset + rel->r_offset); |
252b5132 RH |
1328 | value += addend; |
1329 | break; | |
1330 | } | |
f21f3fe0 | 1331 | |
252b5132 RH |
1332 | bfd_put_32 (input_bfd, value, hit_data); |
1333 | return bfd_reloc_ok; | |
1334 | ||
1335 | case R_ARM_ABS8: | |
1336 | value += addend; | |
1337 | if ((long) value > 0x7f || (long) value < -0x80) | |
1338 | return bfd_reloc_overflow; | |
1339 | ||
1340 | bfd_put_8 (input_bfd, value, hit_data); | |
1341 | return bfd_reloc_ok; | |
1342 | ||
1343 | case R_ARM_ABS16: | |
1344 | value += addend; | |
1345 | ||
1346 | if ((long) value > 0x7fff || (long) value < -0x8000) | |
1347 | return bfd_reloc_overflow; | |
1348 | ||
1349 | bfd_put_16 (input_bfd, value, hit_data); | |
1350 | return bfd_reloc_ok; | |
1351 | ||
1352 | case R_ARM_ABS12: | |
1353 | /* Support ldr and str instruction for the arm */ | |
1354 | /* Also thumb b (unconditional branch). ??? Really? */ | |
1355 | value += addend; | |
1356 | ||
1357 | if ((long) value > 0x7ff || (long) value < -0x800) | |
1358 | return bfd_reloc_overflow; | |
1359 | ||
1360 | value |= (bfd_get_32 (input_bfd, hit_data) & 0xfffff000); | |
1361 | bfd_put_32 (input_bfd, value, hit_data); | |
1362 | return bfd_reloc_ok; | |
1363 | ||
1364 | case R_ARM_THM_ABS5: | |
9b485d32 | 1365 | /* Support ldr and str instructions for the thumb. */ |
252b5132 RH |
1366 | #ifdef USE_REL |
1367 | /* Need to refetch addend. */ | |
1368 | addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask; | |
1369 | /* ??? Need to determine shift amount from operand size. */ | |
1370 | addend >>= howto->rightshift; | |
1371 | #endif | |
1372 | value += addend; | |
1373 | ||
1374 | /* ??? Isn't value unsigned? */ | |
1375 | if ((long) value > 0x1f || (long) value < -0x10) | |
1376 | return bfd_reloc_overflow; | |
1377 | ||
1378 | /* ??? Value needs to be properly shifted into place first. */ | |
1379 | value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f; | |
1380 | bfd_put_16 (input_bfd, value, hit_data); | |
1381 | return bfd_reloc_ok; | |
1382 | ||
dfc5f959 NC |
1383 | #ifndef OLD_ARM_ABI |
1384 | case R_ARM_THM_XPC22: | |
1385 | #endif | |
252b5132 | 1386 | case R_ARM_THM_PC22: |
dfc5f959 | 1387 | /* Thumb BL (branch long instruction). */ |
252b5132 | 1388 | { |
ba96a88f NC |
1389 | bfd_vma relocation; |
1390 | boolean overflow = false; | |
1391 | bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data); | |
1392 | bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2); | |
df212a7e | 1393 | bfd_signed_vma reloc_signed_max = ((1 << (howto->bitsize - 1)) - 1) >> howto->rightshift; |
ba96a88f NC |
1394 | bfd_signed_vma reloc_signed_min = ~ reloc_signed_max; |
1395 | bfd_vma check; | |
252b5132 | 1396 | bfd_signed_vma signed_check; |
252b5132 RH |
1397 | |
1398 | #ifdef USE_REL | |
1399 | /* Need to refetch the addend and squish the two 11 bit pieces | |
1400 | together. */ | |
1401 | { | |
ba96a88f NC |
1402 | bfd_vma upper = upper_insn & 0x7ff; |
1403 | bfd_vma lower = lower_insn & 0x7ff; | |
9b485d32 | 1404 | upper = (upper ^ 0x400) - 0x400; /* Sign extend. */ |
252b5132 | 1405 | addend = (upper << 12) | (lower << 1); |
ba96a88f | 1406 | signed_addend = addend; |
252b5132 RH |
1407 | } |
1408 | #endif | |
dfc5f959 NC |
1409 | #ifndef OLD_ARM_ABI |
1410 | if (r_type == R_ARM_THM_XPC22) | |
1411 | { | |
1412 | /* Check for Thumb to Thumb call. */ | |
1413 | /* FIXME: Should we translate the instruction into a BL | |
1414 | instruction instead ? */ | |
1415 | if (sym_flags == STT_ARM_TFUNC) | |
8f615d07 | 1416 | (*_bfd_error_handler) (_("\ |
dfc5f959 | 1417 | %s: Warning: Thumb BLX instruction targets thumb function '%s'."), |
8f615d07 AM |
1418 | bfd_archive_filename (input_bfd), |
1419 | h ? h->root.root.string : "(local)"); | |
dfc5f959 NC |
1420 | } |
1421 | else | |
1422 | #endif | |
252b5132 | 1423 | { |
dfc5f959 NC |
1424 | /* If it is not a call to Thumb, assume call to Arm. |
1425 | If it is a call relative to a section name, then it is not a | |
1426 | function call at all, but rather a long jump. */ | |
1427 | if (sym_flags != STT_ARM_TFUNC && sym_flags != STT_SECTION) | |
1428 | { | |
1429 | if (elf32_thumb_to_arm_stub | |
1430 | (info, sym_name, input_bfd, output_bfd, input_section, | |
1431 | hit_data, sym_sec, rel->r_offset, signed_addend, value)) | |
1432 | return bfd_reloc_ok; | |
1433 | else | |
1434 | return bfd_reloc_dangerous; | |
1435 | } | |
252b5132 | 1436 | } |
f21f3fe0 | 1437 | |
ba96a88f | 1438 | relocation = value + signed_addend; |
f21f3fe0 | 1439 | |
252b5132 | 1440 | relocation -= (input_section->output_section->vma |
ba96a88f NC |
1441 | + input_section->output_offset |
1442 | + rel->r_offset); | |
9a5aca8c | 1443 | |
ba96a88f NC |
1444 | if (! globals->no_pipeline_knowledge) |
1445 | { | |
9b485d32 | 1446 | Elf_Internal_Ehdr * i_ehdrp; /* Elf file header, internal form. */ |
9a5aca8c | 1447 | |
ba96a88f | 1448 | i_ehdrp = elf_elfheader (input_bfd); |
f21f3fe0 | 1449 | |
ba96a88f NC |
1450 | /* Previous versions of this code also used to add in the pipline |
1451 | offset here. This is wrong because the linker is not supposed | |
1452 | to know about such things, and one day it might change. In order | |
1453 | to support old binaries that need the old behaviour however, so | |
1454 | we attempt to detect which ABI was used to create the reloc. */ | |
1455 | if ( strcmp (bfd_get_target (input_bfd), "elf32-littlearm-oabi") == 0 | |
1456 | || strcmp (bfd_get_target (input_bfd), "elf32-bigarm-oabi") == 0 | |
1457 | || i_ehdrp->e_ident[EI_OSABI] == 0) | |
1458 | relocation += 4; | |
1459 | } | |
f21f3fe0 | 1460 | |
252b5132 RH |
1461 | check = relocation >> howto->rightshift; |
1462 | ||
1463 | /* If this is a signed value, the rightshift just dropped | |
1464 | leading 1 bits (assuming twos complement). */ | |
1465 | if ((bfd_signed_vma) relocation >= 0) | |
1466 | signed_check = check; | |
1467 | else | |
1468 | signed_check = check | ~((bfd_vma) -1 >> howto->rightshift); | |
1469 | ||
252b5132 | 1470 | /* Assumes two's complement. */ |
ba96a88f | 1471 | if (signed_check > reloc_signed_max || signed_check < reloc_signed_min) |
252b5132 RH |
1472 | overflow = true; |
1473 | ||
1474 | /* Put RELOCATION back into the insn. */ | |
1475 | upper_insn = (upper_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 12) & 0x7ff); | |
1476 | lower_insn = (lower_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 1) & 0x7ff); | |
1477 | ||
df425bc0 | 1478 | #ifndef OLD_ARM_ABI |
4f3c3dbb NC |
1479 | if (r_type == R_ARM_THM_XPC22 |
1480 | && ((lower_insn & 0x1800) == 0x0800)) | |
1481 | /* Remove bit zero of the adjusted offset. Bit zero can only be | |
1482 | set if the upper insn is at a half-word boundary, since the | |
1483 | destination address, an ARM instruction, must always be on a | |
1484 | word boundary. The semantics of the BLX (1) instruction, however, | |
1485 | are that bit zero in the offset must always be zero, and the | |
1486 | corresponding bit one in the target address will be set from bit | |
1487 | one of the source address. */ | |
1488 | lower_insn &= ~1; | |
99e4ae17 | 1489 | #endif |
252b5132 RH |
1490 | /* Put the relocated value back in the object file: */ |
1491 | bfd_put_16 (input_bfd, upper_insn, hit_data); | |
1492 | bfd_put_16 (input_bfd, lower_insn, hit_data + 2); | |
1493 | ||
1494 | return (overflow ? bfd_reloc_overflow : bfd_reloc_ok); | |
1495 | } | |
1496 | break; | |
1497 | ||
51c5503b NC |
1498 | case R_ARM_THM_PC11: |
1499 | /* Thumb B (branch) instruction). */ | |
1500 | { | |
1501 | bfd_vma relocation; | |
1502 | bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1; | |
1503 | bfd_signed_vma reloc_signed_min = ~ reloc_signed_max; | |
1504 | bfd_vma check; | |
1505 | bfd_signed_vma signed_check; | |
1506 | ||
1507 | #ifdef USE_REL | |
1508 | /* Need to refetch addend. */ | |
1509 | addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask; | |
1510 | /* ??? Need to determine shift amount from operand size. */ | |
1511 | addend >>= howto->rightshift; | |
1512 | #endif | |
1513 | relocation = value + addend; | |
1514 | ||
1515 | relocation -= (input_section->output_section->vma | |
1516 | + input_section->output_offset | |
1517 | + rel->r_offset); | |
1518 | ||
1519 | check = relocation >> howto->rightshift; | |
1520 | ||
1521 | /* If this is a signed value, the rightshift just | |
1522 | dropped leading 1 bits (assuming twos complement). */ | |
1523 | if ((bfd_signed_vma) relocation >= 0) | |
1524 | signed_check = check; | |
1525 | else | |
1526 | signed_check = check | ~((bfd_vma) -1 >> howto->rightshift); | |
1527 | ||
1528 | relocation |= (bfd_get_16 (input_bfd, hit_data) & (~ howto->dst_mask)); | |
1529 | ||
1530 | bfd_put_16 (input_bfd, relocation, hit_data); | |
1531 | ||
1532 | /* Assumes two's complement. */ | |
1533 | if (signed_check > reloc_signed_max || signed_check < reloc_signed_min) | |
1534 | return bfd_reloc_overflow; | |
1535 | ||
1536 | return bfd_reloc_ok; | |
1537 | } | |
1538 | ||
252b5132 RH |
1539 | case R_ARM_GNU_VTINHERIT: |
1540 | case R_ARM_GNU_VTENTRY: | |
1541 | return bfd_reloc_ok; | |
1542 | ||
1543 | case R_ARM_COPY: | |
1544 | return bfd_reloc_notsupported; | |
1545 | ||
1546 | case R_ARM_GLOB_DAT: | |
1547 | return bfd_reloc_notsupported; | |
1548 | ||
1549 | case R_ARM_JUMP_SLOT: | |
1550 | return bfd_reloc_notsupported; | |
1551 | ||
1552 | case R_ARM_RELATIVE: | |
1553 | return bfd_reloc_notsupported; | |
1554 | ||
1555 | case R_ARM_GOTOFF: | |
1556 | /* Relocation is relative to the start of the | |
1557 | global offset table. */ | |
1558 | ||
1559 | BFD_ASSERT (sgot != NULL); | |
1560 | if (sgot == NULL) | |
1561 | return bfd_reloc_notsupported; | |
9a5aca8c | 1562 | |
ee29b9fb RE |
1563 | /* If we are addressing a Thumb function, we need to adjust the |
1564 | address by one, so that attempts to call the function pointer will | |
1565 | correctly interpret it as Thumb code. */ | |
1566 | if (sym_flags == STT_ARM_TFUNC) | |
1567 | value += 1; | |
1568 | ||
252b5132 RH |
1569 | /* Note that sgot->output_offset is not involved in this |
1570 | calculation. We always want the start of .got. If we | |
1571 | define _GLOBAL_OFFSET_TABLE in a different way, as is | |
1572 | permitted by the ABI, we might have to change this | |
9b485d32 | 1573 | calculation. */ |
252b5132 | 1574 | value -= sgot->output_section->vma; |
f21f3fe0 | 1575 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
99e4ae17 AJ |
1576 | contents, rel->r_offset, value, |
1577 | (bfd_vma) 0); | |
252b5132 RH |
1578 | |
1579 | case R_ARM_GOTPC: | |
a7c10850 | 1580 | /* Use global offset table as symbol value. */ |
252b5132 | 1581 | BFD_ASSERT (sgot != NULL); |
f21f3fe0 | 1582 | |
252b5132 RH |
1583 | if (sgot == NULL) |
1584 | return bfd_reloc_notsupported; | |
1585 | ||
1586 | value = sgot->output_section->vma; | |
f21f3fe0 | 1587 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
99e4ae17 AJ |
1588 | contents, rel->r_offset, value, |
1589 | (bfd_vma) 0); | |
f21f3fe0 | 1590 | |
252b5132 RH |
1591 | case R_ARM_GOT32: |
1592 | /* Relocation is to the entry for this symbol in the | |
9b485d32 | 1593 | global offset table. */ |
252b5132 RH |
1594 | if (sgot == NULL) |
1595 | return bfd_reloc_notsupported; | |
f21f3fe0 | 1596 | |
252b5132 RH |
1597 | if (h != NULL) |
1598 | { | |
1599 | bfd_vma off; | |
f21f3fe0 | 1600 | |
252b5132 RH |
1601 | off = h->got.offset; |
1602 | BFD_ASSERT (off != (bfd_vma) -1); | |
f21f3fe0 | 1603 | |
252b5132 RH |
1604 | if (!elf_hash_table (info)->dynamic_sections_created || |
1605 | (info->shared && (info->symbolic || h->dynindx == -1) | |
1606 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))) | |
1607 | { | |
1608 | /* This is actually a static link, or it is a -Bsymbolic link | |
1609 | and the symbol is defined locally. We must initialize this | |
1610 | entry in the global offset table. Since the offset must | |
1611 | always be a multiple of 4, we use the least significant bit | |
1612 | to record whether we have initialized it already. | |
f21f3fe0 | 1613 | |
252b5132 | 1614 | When doing a dynamic link, we create a .rel.got relocation |
f21f3fe0 | 1615 | entry to initialize the value. This is done in the |
9b485d32 | 1616 | finish_dynamic_symbol routine. */ |
252b5132 RH |
1617 | if ((off & 1) != 0) |
1618 | off &= ~1; | |
1619 | else | |
1620 | { | |
ee29b9fb RE |
1621 | /* If we are addressing a Thumb function, we need to |
1622 | adjust the address by one, so that attempts to | |
1623 | call the function pointer will correctly | |
1624 | interpret it as Thumb code. */ | |
1625 | if (sym_flags == STT_ARM_TFUNC) | |
1626 | value |= 1; | |
1627 | ||
252b5132 RH |
1628 | bfd_put_32 (output_bfd, value, sgot->contents + off); |
1629 | h->got.offset |= 1; | |
1630 | } | |
1631 | } | |
f21f3fe0 | 1632 | |
252b5132 RH |
1633 | value = sgot->output_offset + off; |
1634 | } | |
1635 | else | |
1636 | { | |
1637 | bfd_vma off; | |
f21f3fe0 | 1638 | |
252b5132 RH |
1639 | BFD_ASSERT (local_got_offsets != NULL && |
1640 | local_got_offsets[r_symndx] != (bfd_vma) -1); | |
f21f3fe0 | 1641 | |
252b5132 | 1642 | off = local_got_offsets[r_symndx]; |
f21f3fe0 | 1643 | |
252b5132 RH |
1644 | /* The offset must always be a multiple of 4. We use the |
1645 | least significant bit to record whether we have already | |
9b485d32 | 1646 | generated the necessary reloc. */ |
252b5132 RH |
1647 | if ((off & 1) != 0) |
1648 | off &= ~1; | |
1649 | else | |
1650 | { | |
1651 | bfd_put_32 (output_bfd, value, sgot->contents + off); | |
f21f3fe0 | 1652 | |
252b5132 RH |
1653 | if (info->shared) |
1654 | { | |
1655 | asection * srelgot; | |
1656 | Elf_Internal_Rel outrel; | |
f21f3fe0 | 1657 | |
252b5132 RH |
1658 | srelgot = bfd_get_section_by_name (dynobj, ".rel.got"); |
1659 | BFD_ASSERT (srelgot != NULL); | |
f21f3fe0 | 1660 | |
252b5132 | 1661 | outrel.r_offset = (sgot->output_section->vma |
f21f3fe0 | 1662 | + sgot->output_offset |
252b5132 RH |
1663 | + off); |
1664 | outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE); | |
1665 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, | |
1666 | (((Elf32_External_Rel *) | |
1667 | srelgot->contents) | |
1668 | + srelgot->reloc_count)); | |
1669 | ++srelgot->reloc_count; | |
1670 | } | |
f21f3fe0 | 1671 | |
252b5132 RH |
1672 | local_got_offsets[r_symndx] |= 1; |
1673 | } | |
f21f3fe0 | 1674 | |
252b5132 RH |
1675 | value = sgot->output_offset + off; |
1676 | } | |
9a5aca8c | 1677 | |
f21f3fe0 | 1678 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
99e4ae17 AJ |
1679 | contents, rel->r_offset, value, |
1680 | (bfd_vma) 0); | |
f21f3fe0 | 1681 | |
252b5132 RH |
1682 | case R_ARM_PLT32: |
1683 | /* Relocation is to the entry for this symbol in the | |
1684 | procedure linkage table. */ | |
1685 | ||
1686 | /* Resolve a PLT32 reloc against a local symbol directly, | |
9b485d32 | 1687 | without using the procedure linkage table. */ |
252b5132 RH |
1688 | if (h == NULL) |
1689 | return _bfd_final_link_relocate (howto, input_bfd, input_section, | |
99e4ae17 AJ |
1690 | contents, rel->r_offset, value, |
1691 | (bfd_vma) 0); | |
252b5132 RH |
1692 | |
1693 | if (h->plt.offset == (bfd_vma) -1) | |
1694 | /* We didn't make a PLT entry for this symbol. This | |
1695 | happens when statically linking PIC code, or when | |
1696 | using -Bsymbolic. */ | |
1697 | return _bfd_final_link_relocate (howto, input_bfd, input_section, | |
1698 | contents, rel->r_offset, value, | |
1699 | (bfd_vma) 0); | |
1700 | ||
1701 | BFD_ASSERT(splt != NULL); | |
1702 | if (splt == NULL) | |
1703 | return bfd_reloc_notsupported; | |
1704 | ||
1705 | value = (splt->output_section->vma | |
1706 | + splt->output_offset | |
1707 | + h->plt.offset); | |
1708 | return _bfd_final_link_relocate (howto, input_bfd, input_section, | |
99e4ae17 AJ |
1709 | contents, rel->r_offset, value, |
1710 | (bfd_vma) 0); | |
f21f3fe0 | 1711 | |
252b5132 RH |
1712 | case R_ARM_SBREL32: |
1713 | return bfd_reloc_notsupported; | |
1714 | ||
1715 | case R_ARM_AMP_VCALL9: | |
1716 | return bfd_reloc_notsupported; | |
1717 | ||
1718 | case R_ARM_RSBREL32: | |
1719 | return bfd_reloc_notsupported; | |
1720 | ||
1721 | case R_ARM_THM_RPC22: | |
1722 | return bfd_reloc_notsupported; | |
1723 | ||
1724 | case R_ARM_RREL32: | |
1725 | return bfd_reloc_notsupported; | |
1726 | ||
1727 | case R_ARM_RABS32: | |
1728 | return bfd_reloc_notsupported; | |
1729 | ||
1730 | case R_ARM_RPC24: | |
1731 | return bfd_reloc_notsupported; | |
1732 | ||
1733 | case R_ARM_RBASE: | |
1734 | return bfd_reloc_notsupported; | |
1735 | ||
1736 | default: | |
1737 | return bfd_reloc_notsupported; | |
1738 | } | |
1739 | } | |
1740 | ||
98c1d4aa NC |
1741 | #ifdef USE_REL |
1742 | /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */ | |
1743 | static void | |
1744 | arm_add_to_rel (abfd, address, howto, increment) | |
1745 | bfd * abfd; | |
59f2c4e7 | 1746 | bfd_byte * address; |
98c1d4aa NC |
1747 | reloc_howto_type * howto; |
1748 | bfd_signed_vma increment; | |
1749 | { | |
98c1d4aa NC |
1750 | bfd_signed_vma addend; |
1751 | ||
9a5aca8c | 1752 | if (howto->type == R_ARM_THM_PC22) |
98c1d4aa | 1753 | { |
9a5aca8c AM |
1754 | int upper_insn, lower_insn; |
1755 | int upper, lower; | |
98c1d4aa | 1756 | |
9a5aca8c AM |
1757 | upper_insn = bfd_get_16 (abfd, address); |
1758 | lower_insn = bfd_get_16 (abfd, address + 2); | |
1759 | upper = upper_insn & 0x7ff; | |
1760 | lower = lower_insn & 0x7ff; | |
1761 | ||
1762 | addend = (upper << 12) | (lower << 1); | |
ddda4409 | 1763 | addend += increment; |
9a5aca8c | 1764 | addend >>= 1; |
98c1d4aa | 1765 | |
9a5aca8c AM |
1766 | upper_insn = (upper_insn & 0xf800) | ((addend >> 11) & 0x7ff); |
1767 | lower_insn = (lower_insn & 0xf800) | (addend & 0x7ff); | |
1768 | ||
dc810e39 AM |
1769 | bfd_put_16 (abfd, (bfd_vma) upper_insn, address); |
1770 | bfd_put_16 (abfd, (bfd_vma) lower_insn, address + 2); | |
9a5aca8c AM |
1771 | } |
1772 | else | |
1773 | { | |
1774 | bfd_vma contents; | |
1775 | ||
1776 | contents = bfd_get_32 (abfd, address); | |
1777 | ||
1778 | /* Get the (signed) value from the instruction. */ | |
1779 | addend = contents & howto->src_mask; | |
1780 | if (addend & ((howto->src_mask + 1) >> 1)) | |
1781 | { | |
1782 | bfd_signed_vma mask; | |
1783 | ||
1784 | mask = -1; | |
1785 | mask &= ~ howto->src_mask; | |
1786 | addend |= mask; | |
1787 | } | |
1788 | ||
1789 | /* Add in the increment, (which is a byte value). */ | |
1790 | switch (howto->type) | |
1791 | { | |
1792 | default: | |
1793 | addend += increment; | |
1794 | break; | |
1795 | ||
1796 | case R_ARM_PC24: | |
1797 | addend <<= howto->size; | |
dc810e39 | 1798 | addend += increment; |
9a5aca8c AM |
1799 | |
1800 | /* Should we check for overflow here ? */ | |
1801 | ||
1802 | /* Drop any undesired bits. */ | |
1803 | addend >>= howto->rightshift; | |
1804 | break; | |
1805 | } | |
1806 | ||
1807 | contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask); | |
1808 | ||
1809 | bfd_put_32 (abfd, contents, address); | |
ddda4409 | 1810 | } |
98c1d4aa NC |
1811 | } |
1812 | #endif /* USE_REL */ | |
252b5132 RH |
1813 | |
1814 | /* Relocate an ARM ELF section. */ | |
1815 | static boolean | |
1816 | elf32_arm_relocate_section (output_bfd, info, input_bfd, input_section, | |
1817 | contents, relocs, local_syms, local_sections) | |
1818 | bfd * output_bfd; | |
1819 | struct bfd_link_info * info; | |
1820 | bfd * input_bfd; | |
1821 | asection * input_section; | |
1822 | bfd_byte * contents; | |
1823 | Elf_Internal_Rela * relocs; | |
1824 | Elf_Internal_Sym * local_syms; | |
1825 | asection ** local_sections; | |
1826 | { | |
1827 | Elf_Internal_Shdr * symtab_hdr; | |
1828 | struct elf_link_hash_entry ** sym_hashes; | |
1829 | Elf_Internal_Rela * rel; | |
1830 | Elf_Internal_Rela * relend; | |
1831 | const char * name; | |
1832 | ||
b491616a AM |
1833 | #ifndef USE_REL |
1834 | if (info->relocateable) | |
1835 | return true; | |
1836 | #endif | |
1837 | ||
252b5132 RH |
1838 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; |
1839 | sym_hashes = elf_sym_hashes (input_bfd); | |
1840 | ||
1841 | rel = relocs; | |
1842 | relend = relocs + input_section->reloc_count; | |
1843 | for (; rel < relend; rel++) | |
1844 | { | |
ba96a88f NC |
1845 | int r_type; |
1846 | reloc_howto_type * howto; | |
1847 | unsigned long r_symndx; | |
1848 | Elf_Internal_Sym * sym; | |
1849 | asection * sec; | |
252b5132 | 1850 | struct elf_link_hash_entry * h; |
ba96a88f NC |
1851 | bfd_vma relocation; |
1852 | bfd_reloc_status_type r; | |
1853 | arelent bfd_reloc; | |
f21f3fe0 | 1854 | |
252b5132 | 1855 | r_symndx = ELF32_R_SYM (rel->r_info); |
ba96a88f | 1856 | r_type = ELF32_R_TYPE (rel->r_info); |
252b5132 | 1857 | |
ba96a88f NC |
1858 | if ( r_type == R_ARM_GNU_VTENTRY |
1859 | || r_type == R_ARM_GNU_VTINHERIT) | |
252b5132 RH |
1860 | continue; |
1861 | ||
dc810e39 AM |
1862 | #ifdef USE_REL |
1863 | elf32_arm_info_to_howto (input_bfd, & bfd_reloc, | |
1864 | (Elf_Internal_Rel *) rel); | |
1865 | #else | |
1866 | elf32_arm_info_to_howto (input_bfd, & bfd_reloc, rel); | |
1867 | #endif | |
ba96a88f | 1868 | howto = bfd_reloc.howto; |
252b5132 | 1869 | |
b491616a | 1870 | #ifdef USE_REL |
252b5132 RH |
1871 | if (info->relocateable) |
1872 | { | |
1873 | /* This is a relocateable link. We don't have to change | |
1874 | anything, unless the reloc is against a section symbol, | |
1875 | in which case we have to adjust according to where the | |
1876 | section symbol winds up in the output section. */ | |
1877 | if (r_symndx < symtab_hdr->sh_info) | |
1878 | { | |
1879 | sym = local_syms + r_symndx; | |
1880 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
1881 | { | |
1882 | sec = local_sections[r_symndx]; | |
98c1d4aa | 1883 | arm_add_to_rel (input_bfd, contents + rel->r_offset, |
dc810e39 AM |
1884 | howto, |
1885 | (bfd_signed_vma) (sec->output_offset | |
1886 | + sym->st_value)); | |
252b5132 RH |
1887 | } |
1888 | } | |
1889 | ||
1890 | continue; | |
1891 | } | |
b491616a | 1892 | #endif |
252b5132 RH |
1893 | |
1894 | /* This is a final link. */ | |
1895 | h = NULL; | |
1896 | sym = NULL; | |
1897 | sec = NULL; | |
9b485d32 | 1898 | |
252b5132 RH |
1899 | if (r_symndx < symtab_hdr->sh_info) |
1900 | { | |
1901 | sym = local_syms + r_symndx; | |
1902 | sec = local_sections[r_symndx]; | |
f8df10f4 | 1903 | #ifdef USE_REL |
252b5132 RH |
1904 | relocation = (sec->output_section->vma |
1905 | + sec->output_offset | |
1906 | + sym->st_value); | |
f8df10f4 JJ |
1907 | if ((sec->flags & SEC_MERGE) |
1908 | && ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
1909 | { | |
1910 | asection *msec; | |
1911 | bfd_vma addend, value; | |
1912 | ||
1913 | if (howto->rightshift) | |
1914 | { | |
1915 | (*_bfd_error_handler) | |
1916 | (_("%s(%s+0x%lx): %s relocation against SEC_MERGE section"), | |
1917 | bfd_archive_filename (input_bfd), | |
1918 | bfd_get_section_name (input_bfd, input_section), | |
1919 | (long) rel->r_offset, howto->name); | |
1920 | return false; | |
1921 | } | |
1922 | ||
1923 | value = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
1924 | ||
1925 | /* Get the (signed) value from the instruction. */ | |
1926 | addend = value & howto->src_mask; | |
1927 | if (addend & ((howto->src_mask + 1) >> 1)) | |
1928 | { | |
1929 | bfd_signed_vma mask; | |
1930 | ||
1931 | mask = -1; | |
1932 | mask &= ~ howto->src_mask; | |
1933 | addend |= mask; | |
1934 | } | |
1935 | msec = sec; | |
1936 | addend = | |
c629eae0 | 1937 | _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend) |
f8df10f4 JJ |
1938 | - relocation; |
1939 | addend += msec->output_section->vma + msec->output_offset; | |
1940 | value = (value & ~ howto->dst_mask) | (addend & howto->dst_mask); | |
1941 | bfd_put_32 (input_bfd, value, contents + rel->r_offset); | |
1942 | } | |
1943 | #else | |
1944 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel); | |
1945 | #endif | |
252b5132 RH |
1946 | } |
1947 | else | |
1948 | { | |
1949 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
9b485d32 NC |
1950 | |
1951 | while ( h->root.type == bfd_link_hash_indirect | |
252b5132 RH |
1952 | || h->root.type == bfd_link_hash_warning) |
1953 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
9b485d32 NC |
1954 | |
1955 | if ( h->root.type == bfd_link_hash_defined | |
252b5132 RH |
1956 | || h->root.type == bfd_link_hash_defweak) |
1957 | { | |
780a67af | 1958 | int relocation_needed = 1; |
f21f3fe0 | 1959 | |
780a67af | 1960 | sec = h->root.u.def.section; |
f21f3fe0 | 1961 | |
252b5132 | 1962 | /* In these cases, we don't need the relocation value. |
f21f3fe0 | 1963 | We check specially because in some obscure cases |
9b485d32 | 1964 | sec->output_section will be NULL. */ |
252b5132 RH |
1965 | switch (r_type) |
1966 | { | |
1967 | case R_ARM_PC24: | |
1968 | case R_ARM_ABS32: | |
6a360bf4 | 1969 | case R_ARM_THM_PC22: |
252b5132 RH |
1970 | if (info->shared |
1971 | && ( | |
99e4ae17 | 1972 | (!info->symbolic && h->dynindx != -1) |
97eaf9de | 1973 | || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 |
252b5132 | 1974 | ) |
05924f36 PB |
1975 | && ((input_section->flags & SEC_ALLOC) != 0 |
1976 | /* DWARF will emit R_ARM_ABS32 relocations in its | |
1977 | sections against symbols defined externally | |
1978 | in shared libraries. We can't do anything | |
1979 | with them here. */ | |
1980 | || ((input_section->flags & SEC_DEBUGGING) != 0 | |
1981 | && (h->elf_link_hash_flags | |
1982 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0)) | |
252b5132 | 1983 | ) |
780a67af | 1984 | relocation_needed = 0; |
252b5132 | 1985 | break; |
f21f3fe0 | 1986 | |
252b5132 | 1987 | case R_ARM_GOTPC: |
780a67af | 1988 | relocation_needed = 0; |
252b5132 | 1989 | break; |
f21f3fe0 | 1990 | |
252b5132 RH |
1991 | case R_ARM_GOT32: |
1992 | if (elf_hash_table(info)->dynamic_sections_created | |
1993 | && (!info->shared | |
1994 | || (!info->symbolic && h->dynindx != -1) | |
1995 | || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 | |
1996 | ) | |
1997 | ) | |
780a67af | 1998 | relocation_needed = 0; |
252b5132 | 1999 | break; |
f21f3fe0 | 2000 | |
252b5132 RH |
2001 | case R_ARM_PLT32: |
2002 | if (h->plt.offset != (bfd_vma)-1) | |
780a67af | 2003 | relocation_needed = 0; |
252b5132 | 2004 | break; |
f21f3fe0 | 2005 | |
252b5132 RH |
2006 | default: |
2007 | if (sec->output_section == NULL) | |
2008 | { | |
2009 | (*_bfd_error_handler) | |
6a360bf4 NC |
2010 | (_("%s: warning: unresolvable relocation %d against symbol `%s' from %s section"), |
2011 | bfd_archive_filename (input_bfd), | |
2012 | r_type, | |
2013 | h->root.root.string, | |
252b5132 | 2014 | bfd_get_section_name (input_bfd, input_section)); |
780a67af | 2015 | relocation_needed = 0; |
252b5132 RH |
2016 | } |
2017 | } | |
780a67af NC |
2018 | |
2019 | if (relocation_needed) | |
2020 | relocation = h->root.u.def.value | |
2021 | + sec->output_section->vma | |
2022 | + sec->output_offset; | |
2023 | else | |
2024 | relocation = 0; | |
252b5132 RH |
2025 | } |
2026 | else if (h->root.type == bfd_link_hash_undefweak) | |
2027 | relocation = 0; | |
3a27a730 L |
2028 | else if (info->shared && !info->symbolic |
2029 | && !info->no_undefined | |
2030 | && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) | |
a72747a3 | 2031 | relocation = 0; |
252b5132 RH |
2032 | else |
2033 | { | |
2034 | if (!((*info->callbacks->undefined_symbol) | |
2035 | (info, h->root.root.string, input_bfd, | |
5cc7c785 | 2036 | input_section, rel->r_offset, |
3a27a730 L |
2037 | (!info->shared || info->no_undefined |
2038 | || ELF_ST_VISIBILITY (h->other))))) | |
252b5132 RH |
2039 | return false; |
2040 | relocation = 0; | |
2041 | } | |
2042 | } | |
2043 | ||
2044 | if (h != NULL) | |
2045 | name = h->root.root.string; | |
2046 | else | |
2047 | { | |
2048 | name = (bfd_elf_string_from_elf_section | |
2049 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); | |
2050 | if (name == NULL || *name == '\0') | |
2051 | name = bfd_section_name (input_bfd, sec); | |
2052 | } | |
f21f3fe0 | 2053 | |
252b5132 RH |
2054 | r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd, |
2055 | input_section, contents, rel, | |
2056 | relocation, info, sec, name, | |
2057 | (h ? ELF_ST_TYPE (h->type) : | |
780a67af | 2058 | ELF_ST_TYPE (sym->st_info)), h); |
252b5132 RH |
2059 | |
2060 | if (r != bfd_reloc_ok) | |
2061 | { | |
2062 | const char * msg = (const char *) 0; | |
2063 | ||
2064 | switch (r) | |
2065 | { | |
2066 | case bfd_reloc_overflow: | |
cf919dfd PB |
2067 | /* If the overflowing reloc was to an undefined symbol, |
2068 | we have already printed one error message and there | |
2069 | is no point complaining again. */ | |
2070 | if ((! h || | |
2071 | h->root.type != bfd_link_hash_undefined) | |
2072 | && (!((*info->callbacks->reloc_overflow) | |
2073 | (info, name, howto->name, (bfd_vma) 0, | |
2074 | input_bfd, input_section, rel->r_offset)))) | |
2075 | return false; | |
252b5132 RH |
2076 | break; |
2077 | ||
2078 | case bfd_reloc_undefined: | |
2079 | if (!((*info->callbacks->undefined_symbol) | |
2080 | (info, name, input_bfd, input_section, | |
5cc7c785 | 2081 | rel->r_offset, true))) |
252b5132 RH |
2082 | return false; |
2083 | break; | |
2084 | ||
2085 | case bfd_reloc_outofrange: | |
9b485d32 | 2086 | msg = _("internal error: out of range error"); |
252b5132 RH |
2087 | goto common_error; |
2088 | ||
2089 | case bfd_reloc_notsupported: | |
9b485d32 | 2090 | msg = _("internal error: unsupported relocation error"); |
252b5132 RH |
2091 | goto common_error; |
2092 | ||
2093 | case bfd_reloc_dangerous: | |
9b485d32 | 2094 | msg = _("internal error: dangerous error"); |
252b5132 RH |
2095 | goto common_error; |
2096 | ||
2097 | default: | |
9b485d32 | 2098 | msg = _("internal error: unknown error"); |
252b5132 RH |
2099 | /* fall through */ |
2100 | ||
2101 | common_error: | |
2102 | if (!((*info->callbacks->warning) | |
2103 | (info, msg, name, input_bfd, input_section, | |
2104 | rel->r_offset))) | |
2105 | return false; | |
2106 | break; | |
2107 | } | |
2108 | } | |
2109 | } | |
2110 | ||
2111 | return true; | |
2112 | } | |
2113 | ||
fc830a83 | 2114 | /* Function to keep ARM specific flags in the ELF header. */ |
252b5132 RH |
2115 | static boolean |
2116 | elf32_arm_set_private_flags (abfd, flags) | |
2117 | bfd *abfd; | |
2118 | flagword flags; | |
2119 | { | |
2120 | if (elf_flags_init (abfd) | |
2121 | && elf_elfheader (abfd)->e_flags != flags) | |
2122 | { | |
fc830a83 NC |
2123 | if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN) |
2124 | { | |
fd2ec330 | 2125 | if (flags & EF_ARM_INTERWORK) |
8f615d07 | 2126 | (*_bfd_error_handler) (_("\ |
ae1a89b7 | 2127 | Warning: Not setting interworking flag of %s since it has already been specified as non-interworking"), |
8f615d07 | 2128 | bfd_archive_filename (abfd)); |
fc830a83 | 2129 | else |
63b0f745 | 2130 | _bfd_error_handler (_("\ |
ae1a89b7 | 2131 | Warning: Clearing the interworking flag of %s due to outside request"), |
63b0f745 | 2132 | bfd_archive_filename (abfd)); |
fc830a83 | 2133 | } |
252b5132 RH |
2134 | } |
2135 | else | |
2136 | { | |
2137 | elf_elfheader (abfd)->e_flags = flags; | |
2138 | elf_flags_init (abfd) = true; | |
2139 | } | |
2140 | ||
2141 | return true; | |
2142 | } | |
2143 | ||
fc830a83 | 2144 | /* Copy backend specific data from one object module to another. */ |
9b485d32 | 2145 | |
252b5132 RH |
2146 | static boolean |
2147 | elf32_arm_copy_private_bfd_data (ibfd, obfd) | |
2148 | bfd *ibfd; | |
2149 | bfd *obfd; | |
2150 | { | |
2151 | flagword in_flags; | |
2152 | flagword out_flags; | |
2153 | ||
fc830a83 | 2154 | if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
252b5132 RH |
2155 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
2156 | return true; | |
2157 | ||
fc830a83 | 2158 | in_flags = elf_elfheader (ibfd)->e_flags; |
252b5132 RH |
2159 | out_flags = elf_elfheader (obfd)->e_flags; |
2160 | ||
fc830a83 NC |
2161 | if (elf_flags_init (obfd) |
2162 | && EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN | |
2163 | && in_flags != out_flags) | |
252b5132 | 2164 | { |
252b5132 | 2165 | /* Cannot mix APCS26 and APCS32 code. */ |
fd2ec330 | 2166 | if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26)) |
252b5132 RH |
2167 | return false; |
2168 | ||
2169 | /* Cannot mix float APCS and non-float APCS code. */ | |
fd2ec330 | 2170 | if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT)) |
252b5132 RH |
2171 | return false; |
2172 | ||
2173 | /* If the src and dest have different interworking flags | |
2174 | then turn off the interworking bit. */ | |
fd2ec330 | 2175 | if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK)) |
252b5132 | 2176 | { |
fd2ec330 | 2177 | if (out_flags & EF_ARM_INTERWORK) |
63b0f745 | 2178 | _bfd_error_handler (_("\ |
ae1a89b7 | 2179 | Warning: Clearing the interworking flag of %s because non-interworking code in %s has been linked with it"), |
06317a27 | 2180 | bfd_get_filename (obfd), |
63b0f745 | 2181 | bfd_archive_filename (ibfd)); |
252b5132 | 2182 | |
fd2ec330 | 2183 | in_flags &= ~EF_ARM_INTERWORK; |
252b5132 | 2184 | } |
1006ba19 PB |
2185 | |
2186 | /* Likewise for PIC, though don't warn for this case. */ | |
fd2ec330 PB |
2187 | if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC)) |
2188 | in_flags &= ~EF_ARM_PIC; | |
252b5132 RH |
2189 | } |
2190 | ||
2191 | elf_elfheader (obfd)->e_flags = in_flags; | |
2192 | elf_flags_init (obfd) = true; | |
2193 | ||
2194 | return true; | |
2195 | } | |
2196 | ||
2197 | /* Merge backend specific data from an object file to the output | |
2198 | object file when linking. */ | |
9b485d32 | 2199 | |
252b5132 RH |
2200 | static boolean |
2201 | elf32_arm_merge_private_bfd_data (ibfd, obfd) | |
fc830a83 NC |
2202 | bfd * ibfd; |
2203 | bfd * obfd; | |
252b5132 RH |
2204 | { |
2205 | flagword out_flags; | |
2206 | flagword in_flags; | |
1006ba19 | 2207 | boolean flags_compatible = true; |
cf919dfd PB |
2208 | boolean null_input_bfd = true; |
2209 | asection *sec; | |
252b5132 | 2210 | |
9b485d32 | 2211 | /* Check if we have the same endianess. */ |
1fe494a5 NC |
2212 | if (_bfd_generic_verify_endian_match (ibfd, obfd) == false) |
2213 | return false; | |
2214 | ||
252b5132 RH |
2215 | if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
2216 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
2217 | return true; | |
2218 | ||
252b5132 RH |
2219 | /* The input BFD must have had its flags initialised. */ |
2220 | /* The following seems bogus to me -- The flags are initialized in | |
2221 | the assembler but I don't think an elf_flags_init field is | |
9b485d32 | 2222 | written into the object. */ |
252b5132 RH |
2223 | /* BFD_ASSERT (elf_flags_init (ibfd)); */ |
2224 | ||
2225 | in_flags = elf_elfheader (ibfd)->e_flags; | |
2226 | out_flags = elf_elfheader (obfd)->e_flags; | |
2227 | ||
2228 | if (!elf_flags_init (obfd)) | |
2229 | { | |
fe077fa6 NC |
2230 | /* If the input is the default architecture and had the default |
2231 | flags then do not bother setting the flags for the output | |
2232 | architecture, instead allow future merges to do this. If no | |
2233 | future merges ever set these flags then they will retain their | |
2234 | uninitialised values, which surprise surprise, correspond | |
252b5132 | 2235 | to the default values. */ |
fe077fa6 NC |
2236 | if (bfd_get_arch_info (ibfd)->the_default |
2237 | && elf_elfheader (ibfd)->e_flags == 0) | |
252b5132 RH |
2238 | return true; |
2239 | ||
2240 | elf_flags_init (obfd) = true; | |
2241 | elf_elfheader (obfd)->e_flags = in_flags; | |
2242 | ||
2243 | if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) | |
2244 | && bfd_get_arch_info (obfd)->the_default) | |
2245 | return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd)); | |
2246 | ||
2247 | return true; | |
2248 | } | |
2249 | ||
1006ba19 | 2250 | /* Identical flags must be compatible. */ |
252b5132 RH |
2251 | if (in_flags == out_flags) |
2252 | return true; | |
2253 | ||
cf919dfd PB |
2254 | /* Check to see if the input BFD actually contains any sections. |
2255 | If not, its flags may not have been initialised either, but it cannot | |
2256 | actually cause any incompatibility. */ | |
2257 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) | |
2258 | { | |
2259 | /* Ignore synthetic glue sections. */ | |
2260 | if (strcmp (sec->name, ".glue_7") | |
2261 | && strcmp (sec->name, ".glue_7t")) | |
2262 | { | |
2263 | null_input_bfd = false; | |
2264 | break; | |
2265 | } | |
2266 | } | |
2267 | if (null_input_bfd) | |
2268 | return true; | |
2269 | ||
252b5132 | 2270 | /* Complain about various flag mismatches. */ |
fc830a83 NC |
2271 | if (EF_ARM_EABI_VERSION (in_flags) != EF_ARM_EABI_VERSION (out_flags)) |
2272 | { | |
63b0f745 | 2273 | _bfd_error_handler (_("\ |
6c571f00 | 2274 | ERROR: %s is compiled for EABI version %d, whereas %s is compiled for version %d"), |
63b0f745 NC |
2275 | bfd_archive_filename (ibfd), |
2276 | (in_flags & EF_ARM_EABIMASK) >> 24, | |
06317a27 | 2277 | bfd_get_filename (obfd), |
63b0f745 | 2278 | (out_flags & EF_ARM_EABIMASK) >> 24); |
1006ba19 | 2279 | return false; |
fc830a83 | 2280 | } |
252b5132 | 2281 | |
1006ba19 PB |
2282 | /* Not sure what needs to be checked for EABI versions >= 1. */ |
2283 | if (EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN) | |
2284 | { | |
fd2ec330 | 2285 | if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26)) |
1006ba19 | 2286 | { |
63b0f745 | 2287 | _bfd_error_handler (_("\ |
6c571f00 | 2288 | ERROR: %s is compiled for APCS-%d, whereas target %s uses APCS-%d"), |
63b0f745 NC |
2289 | bfd_archive_filename (ibfd), |
2290 | in_flags & EF_ARM_APCS_26 ? 26 : 32, | |
06317a27 | 2291 | bfd_get_filename (obfd), |
63b0f745 | 2292 | out_flags & EF_ARM_APCS_26 ? 26 : 32); |
1006ba19 PB |
2293 | flags_compatible = false; |
2294 | } | |
252b5132 | 2295 | |
fd2ec330 | 2296 | if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT)) |
1006ba19 | 2297 | { |
5eefb65f NC |
2298 | if (in_flags & EF_ARM_APCS_FLOAT) |
2299 | _bfd_error_handler (_("\ | |
6c571f00 | 2300 | ERROR: %s passes floats in float registers, whereas %s passes them in integer registers"), |
5eefb65f NC |
2301 | bfd_archive_filename (ibfd), |
2302 | bfd_get_filename (obfd)); | |
2303 | else | |
2304 | _bfd_error_handler (_("\ | |
6c571f00 | 2305 | ERROR: %s passes floats in integer registers, whereas %s passes them in float registers"), |
5eefb65f NC |
2306 | bfd_archive_filename (ibfd), |
2307 | bfd_get_filename (obfd)); | |
63b0f745 | 2308 | |
1006ba19 PB |
2309 | flags_compatible = false; |
2310 | } | |
252b5132 | 2311 | |
96a846ea | 2312 | if ((in_flags & EF_ARM_VFP_FLOAT) != (out_flags & EF_ARM_VFP_FLOAT)) |
1006ba19 | 2313 | { |
96a846ea RE |
2314 | if (in_flags & EF_ARM_VFP_FLOAT) |
2315 | _bfd_error_handler (_("\ | |
6c571f00 | 2316 | ERROR: %s uses VFP instructions, whereas %s uses FPA instructions"), |
5eefb65f NC |
2317 | bfd_archive_filename (ibfd), |
2318 | bfd_get_filename (obfd)); | |
2319 | else | |
96a846ea | 2320 | _bfd_error_handler (_("\ |
6c571f00 | 2321 | ERROR: %s uses FPA instructions, whereas %s uses VFP instructions"), |
5eefb65f NC |
2322 | bfd_archive_filename (ibfd), |
2323 | bfd_get_filename (obfd)); | |
63b0f745 | 2324 | |
1006ba19 PB |
2325 | flags_compatible = false; |
2326 | } | |
96a846ea RE |
2327 | |
2328 | #ifdef EF_ARM_SOFT_FLOAT | |
2329 | if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT)) | |
2330 | { | |
2331 | /* We can allow interworking between code that is VFP format | |
2332 | layout, and uses either soft float or integer regs for | |
2333 | passing floating point arguments and results. We already | |
2334 | know that the APCS_FLOAT flags match; similarly for VFP | |
2335 | flags. */ | |
2336 | if ((in_flags & EF_ARM_APCS_FLOAT) != 0 | |
2337 | || (in_flags & EF_ARM_VFP_FLOAT) == 0) | |
2338 | { | |
2339 | if (in_flags & EF_ARM_SOFT_FLOAT) | |
517662d4 | 2340 | _bfd_error_handler (_("\ |
6c571f00 | 2341 | ERROR: %s uses software FP, whereas %s uses hardware FP"), |
96a846ea RE |
2342 | bfd_archive_filename (ibfd), |
2343 | bfd_get_filename (obfd)); | |
2344 | else | |
517662d4 | 2345 | _bfd_error_handler (_("\ |
6c571f00 | 2346 | ERROR: %s uses hardware FP, whereas %s uses software FP"), |
96a846ea RE |
2347 | bfd_archive_filename (ibfd), |
2348 | bfd_get_filename (obfd)); | |
2349 | ||
2350 | flags_compatible = false; | |
2351 | } | |
2352 | } | |
ee43f35e | 2353 | #endif |
252b5132 | 2354 | |
1006ba19 | 2355 | /* Interworking mismatch is only a warning. */ |
fd2ec330 | 2356 | if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK)) |
8f615d07 | 2357 | { |
e3c8793a NC |
2358 | if (in_flags & EF_ARM_INTERWORK) |
2359 | { | |
2360 | _bfd_error_handler (_("\ | |
2361 | Warning: %s supports interworking, whereas %s does not"), | |
2362 | bfd_archive_filename (ibfd), | |
2363 | bfd_get_filename (obfd)); | |
2364 | } | |
2365 | else | |
2366 | { | |
2367 | _bfd_error_handler (_("\ | |
2368 | Warning: %s does not support interworking, whereas %s does"), | |
2369 | bfd_archive_filename (ibfd), | |
2370 | bfd_get_filename (obfd)); | |
2371 | } | |
8f615d07 | 2372 | } |
252b5132 | 2373 | } |
63b0f745 | 2374 | |
1006ba19 | 2375 | return flags_compatible; |
252b5132 RH |
2376 | } |
2377 | ||
9b485d32 NC |
2378 | /* Display the flags field. */ |
2379 | ||
252b5132 RH |
2380 | static boolean |
2381 | elf32_arm_print_private_bfd_data (abfd, ptr) | |
2382 | bfd *abfd; | |
2383 | PTR ptr; | |
2384 | { | |
fc830a83 NC |
2385 | FILE * file = (FILE *) ptr; |
2386 | unsigned long flags; | |
252b5132 RH |
2387 | |
2388 | BFD_ASSERT (abfd != NULL && ptr != NULL); | |
2389 | ||
2390 | /* Print normal ELF private data. */ | |
2391 | _bfd_elf_print_private_bfd_data (abfd, ptr); | |
2392 | ||
fc830a83 | 2393 | flags = elf_elfheader (abfd)->e_flags; |
9b485d32 NC |
2394 | /* Ignore init flag - it may not be set, despite the flags field |
2395 | containing valid data. */ | |
252b5132 RH |
2396 | |
2397 | /* xgettext:c-format */ | |
9b485d32 | 2398 | fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); |
252b5132 | 2399 | |
fc830a83 NC |
2400 | switch (EF_ARM_EABI_VERSION (flags)) |
2401 | { | |
2402 | case EF_ARM_EABI_UNKNOWN: | |
2403 | /* The following flag bits are GNU extenstions and not part of the | |
2404 | official ARM ELF extended ABI. Hence they are only decoded if | |
2405 | the EABI version is not set. */ | |
fd2ec330 | 2406 | if (flags & EF_ARM_INTERWORK) |
9b485d32 | 2407 | fprintf (file, _(" [interworking enabled]")); |
9a5aca8c | 2408 | |
fd2ec330 | 2409 | if (flags & EF_ARM_APCS_26) |
6c571f00 | 2410 | fprintf (file, " [APCS-26]"); |
fc830a83 | 2411 | else |
6c571f00 | 2412 | fprintf (file, " [APCS-32]"); |
9a5aca8c | 2413 | |
96a846ea RE |
2414 | if (flags & EF_ARM_VFP_FLOAT) |
2415 | fprintf (file, _(" [VFP float format]")); | |
2416 | else | |
2417 | fprintf (file, _(" [FPA float format]")); | |
2418 | ||
fd2ec330 | 2419 | if (flags & EF_ARM_APCS_FLOAT) |
9b485d32 | 2420 | fprintf (file, _(" [floats passed in float registers]")); |
9a5aca8c | 2421 | |
fd2ec330 | 2422 | if (flags & EF_ARM_PIC) |
9b485d32 | 2423 | fprintf (file, _(" [position independent]")); |
fc830a83 | 2424 | |
fd2ec330 | 2425 | if (flags & EF_ARM_NEW_ABI) |
9b485d32 | 2426 | fprintf (file, _(" [new ABI]")); |
9a5aca8c | 2427 | |
fd2ec330 | 2428 | if (flags & EF_ARM_OLD_ABI) |
9b485d32 | 2429 | fprintf (file, _(" [old ABI]")); |
9a5aca8c | 2430 | |
fd2ec330 | 2431 | if (flags & EF_ARM_SOFT_FLOAT) |
9b485d32 | 2432 | fprintf (file, _(" [software FP]")); |
9a5aca8c | 2433 | |
96a846ea RE |
2434 | flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT |
2435 | | EF_ARM_PIC | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI | |
2436 | | EF_ARM_SOFT_FLOAT | EF_ARM_VFP_FLOAT); | |
fc830a83 | 2437 | break; |
9a5aca8c | 2438 | |
fc830a83 | 2439 | case EF_ARM_EABI_VER1: |
9b485d32 | 2440 | fprintf (file, _(" [Version1 EABI]")); |
9a5aca8c | 2441 | |
fc830a83 | 2442 | if (flags & EF_ARM_SYMSARESORTED) |
9b485d32 | 2443 | fprintf (file, _(" [sorted symbol table]")); |
fc830a83 | 2444 | else |
9b485d32 | 2445 | fprintf (file, _(" [unsorted symbol table]")); |
9a5aca8c | 2446 | |
fc830a83 NC |
2447 | flags &= ~ EF_ARM_SYMSARESORTED; |
2448 | break; | |
9a5aca8c | 2449 | |
fd2ec330 PB |
2450 | case EF_ARM_EABI_VER2: |
2451 | fprintf (file, _(" [Version2 EABI]")); | |
2452 | ||
2453 | if (flags & EF_ARM_SYMSARESORTED) | |
2454 | fprintf (file, _(" [sorted symbol table]")); | |
2455 | else | |
2456 | fprintf (file, _(" [unsorted symbol table]")); | |
2457 | ||
2458 | if (flags & EF_ARM_DYNSYMSUSESEGIDX) | |
2459 | fprintf (file, _(" [dynamic symbols use segment index]")); | |
2460 | ||
2461 | if (flags & EF_ARM_MAPSYMSFIRST) | |
2462 | fprintf (file, _(" [mapping symbols precede others]")); | |
2463 | ||
99e4ae17 | 2464 | flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX |
fd2ec330 PB |
2465 | | EF_ARM_MAPSYMSFIRST); |
2466 | break; | |
2467 | ||
fc830a83 | 2468 | default: |
9b485d32 | 2469 | fprintf (file, _(" <EABI version unrecognised>")); |
fc830a83 NC |
2470 | break; |
2471 | } | |
252b5132 | 2472 | |
fc830a83 | 2473 | flags &= ~ EF_ARM_EABIMASK; |
252b5132 | 2474 | |
fc830a83 | 2475 | if (flags & EF_ARM_RELEXEC) |
9b485d32 | 2476 | fprintf (file, _(" [relocatable executable]")); |
252b5132 | 2477 | |
fc830a83 | 2478 | if (flags & EF_ARM_HASENTRY) |
9b485d32 | 2479 | fprintf (file, _(" [has entry point]")); |
252b5132 | 2480 | |
fc830a83 NC |
2481 | flags &= ~ (EF_ARM_RELEXEC | EF_ARM_HASENTRY); |
2482 | ||
2483 | if (flags) | |
9b485d32 | 2484 | fprintf (file, _("<Unrecognised flag bits set>")); |
9a5aca8c | 2485 | |
252b5132 RH |
2486 | fputc ('\n', file); |
2487 | ||
2488 | return true; | |
2489 | } | |
2490 | ||
2491 | static int | |
2492 | elf32_arm_get_symbol_type (elf_sym, type) | |
2493 | Elf_Internal_Sym * elf_sym; | |
2494 | int type; | |
2495 | { | |
2f0ca46a NC |
2496 | switch (ELF_ST_TYPE (elf_sym->st_info)) |
2497 | { | |
2498 | case STT_ARM_TFUNC: | |
2499 | return ELF_ST_TYPE (elf_sym->st_info); | |
ce855c42 | 2500 | |
2f0ca46a NC |
2501 | case STT_ARM_16BIT: |
2502 | /* If the symbol is not an object, return the STT_ARM_16BIT flag. | |
2503 | This allows us to distinguish between data used by Thumb instructions | |
2504 | and non-data (which is probably code) inside Thumb regions of an | |
2505 | executable. */ | |
2506 | if (type != STT_OBJECT) | |
2507 | return ELF_ST_TYPE (elf_sym->st_info); | |
2508 | break; | |
9a5aca8c | 2509 | |
ce855c42 NC |
2510 | default: |
2511 | break; | |
2f0ca46a NC |
2512 | } |
2513 | ||
2514 | return type; | |
252b5132 | 2515 | } |
f21f3fe0 | 2516 | |
252b5132 RH |
2517 | static asection * |
2518 | elf32_arm_gc_mark_hook (abfd, info, rel, h, sym) | |
2519 | bfd *abfd; | |
5f771d47 | 2520 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
252b5132 RH |
2521 | Elf_Internal_Rela *rel; |
2522 | struct elf_link_hash_entry *h; | |
2523 | Elf_Internal_Sym *sym; | |
2524 | { | |
2525 | if (h != NULL) | |
2526 | { | |
2527 | switch (ELF32_R_TYPE (rel->r_info)) | |
2528 | { | |
2529 | case R_ARM_GNU_VTINHERIT: | |
2530 | case R_ARM_GNU_VTENTRY: | |
2531 | break; | |
2532 | ||
2533 | default: | |
2534 | switch (h->root.type) | |
2535 | { | |
2536 | case bfd_link_hash_defined: | |
2537 | case bfd_link_hash_defweak: | |
2538 | return h->root.u.def.section; | |
2539 | ||
2540 | case bfd_link_hash_common: | |
2541 | return h->root.u.c.p->section; | |
e049a0de ILT |
2542 | |
2543 | default: | |
2544 | break; | |
252b5132 RH |
2545 | } |
2546 | } | |
2547 | } | |
2548 | else | |
2549 | { | |
9ad5cbcf AM |
2550 | return bfd_section_from_elf_index (abfd, sym->st_shndx); |
2551 | } | |
2552 | ||
252b5132 RH |
2553 | return NULL; |
2554 | } | |
2555 | ||
780a67af NC |
2556 | /* Update the got entry reference counts for the section being removed. */ |
2557 | ||
252b5132 RH |
2558 | static boolean |
2559 | elf32_arm_gc_sweep_hook (abfd, info, sec, relocs) | |
5f771d47 ILT |
2560 | bfd *abfd ATTRIBUTE_UNUSED; |
2561 | struct bfd_link_info *info ATTRIBUTE_UNUSED; | |
2562 | asection *sec ATTRIBUTE_UNUSED; | |
2563 | const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED; | |
252b5132 | 2564 | { |
780a67af | 2565 | /* We don't support garbage collection of GOT and PLT relocs yet. */ |
252b5132 RH |
2566 | return true; |
2567 | } | |
2568 | ||
780a67af NC |
2569 | /* Look through the relocs for a section during the first phase. */ |
2570 | ||
252b5132 RH |
2571 | static boolean |
2572 | elf32_arm_check_relocs (abfd, info, sec, relocs) | |
2573 | bfd * abfd; | |
2574 | struct bfd_link_info * info; | |
2575 | asection * sec; | |
2576 | const Elf_Internal_Rela * relocs; | |
2577 | { | |
2578 | Elf_Internal_Shdr * symtab_hdr; | |
2579 | struct elf_link_hash_entry ** sym_hashes; | |
2580 | struct elf_link_hash_entry ** sym_hashes_end; | |
2581 | const Elf_Internal_Rela * rel; | |
2582 | const Elf_Internal_Rela * rel_end; | |
2583 | bfd * dynobj; | |
2584 | asection * sgot, *srelgot, *sreloc; | |
2585 | bfd_vma * local_got_offsets; | |
9a5aca8c | 2586 | |
252b5132 RH |
2587 | if (info->relocateable) |
2588 | return true; | |
9a5aca8c | 2589 | |
252b5132 | 2590 | sgot = srelgot = sreloc = NULL; |
9a5aca8c | 2591 | |
252b5132 RH |
2592 | dynobj = elf_hash_table (info)->dynobj; |
2593 | local_got_offsets = elf_local_got_offsets (abfd); | |
f21f3fe0 | 2594 | |
252b5132 RH |
2595 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
2596 | sym_hashes = elf_sym_hashes (abfd); | |
9b485d32 NC |
2597 | sym_hashes_end = sym_hashes |
2598 | + symtab_hdr->sh_size / sizeof (Elf32_External_Sym); | |
2599 | ||
252b5132 RH |
2600 | if (!elf_bad_symtab (abfd)) |
2601 | sym_hashes_end -= symtab_hdr->sh_info; | |
9b485d32 | 2602 | |
252b5132 RH |
2603 | rel_end = relocs + sec->reloc_count; |
2604 | for (rel = relocs; rel < rel_end; rel++) | |
2605 | { | |
2606 | struct elf_link_hash_entry *h; | |
2607 | unsigned long r_symndx; | |
9a5aca8c | 2608 | |
252b5132 RH |
2609 | r_symndx = ELF32_R_SYM (rel->r_info); |
2610 | if (r_symndx < symtab_hdr->sh_info) | |
2611 | h = NULL; | |
2612 | else | |
2613 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
9a5aca8c | 2614 | |
252b5132 RH |
2615 | /* Some relocs require a global offset table. */ |
2616 | if (dynobj == NULL) | |
2617 | { | |
2618 | switch (ELF32_R_TYPE (rel->r_info)) | |
2619 | { | |
2620 | case R_ARM_GOT32: | |
2621 | case R_ARM_GOTOFF: | |
2622 | case R_ARM_GOTPC: | |
2623 | elf_hash_table (info)->dynobj = dynobj = abfd; | |
2624 | if (! _bfd_elf_create_got_section (dynobj, info)) | |
2625 | return false; | |
2626 | break; | |
2627 | ||
2628 | default: | |
2629 | break; | |
2630 | } | |
2631 | } | |
2632 | ||
2633 | switch (ELF32_R_TYPE (rel->r_info)) | |
2634 | { | |
2635 | case R_ARM_GOT32: | |
2636 | /* This symbol requires a global offset table entry. */ | |
2637 | if (sgot == NULL) | |
2638 | { | |
2639 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
2640 | BFD_ASSERT (sgot != NULL); | |
2641 | } | |
2642 | ||
2643 | /* Get the got relocation section if necessary. */ | |
2644 | if (srelgot == NULL | |
2645 | && (h != NULL || info->shared)) | |
2646 | { | |
2647 | srelgot = bfd_get_section_by_name (dynobj, ".rel.got"); | |
9a5aca8c | 2648 | |
252b5132 RH |
2649 | /* If no got relocation section, make one and initialize. */ |
2650 | if (srelgot == NULL) | |
2651 | { | |
2652 | srelgot = bfd_make_section (dynobj, ".rel.got"); | |
2653 | if (srelgot == NULL | |
2654 | || ! bfd_set_section_flags (dynobj, srelgot, | |
99e4ae17 | 2655 | (SEC_ALLOC |
252b5132 RH |
2656 | | SEC_LOAD |
2657 | | SEC_HAS_CONTENTS | |
2658 | | SEC_IN_MEMORY | |
2659 | | SEC_LINKER_CREATED | |
2660 | | SEC_READONLY)) | |
2661 | || ! bfd_set_section_alignment (dynobj, srelgot, 2)) | |
2662 | return false; | |
2663 | } | |
2664 | } | |
2665 | ||
2666 | if (h != NULL) | |
2667 | { | |
2668 | if (h->got.offset != (bfd_vma) -1) | |
2669 | /* We have already allocated space in the .got. */ | |
2670 | break; | |
f21f3fe0 | 2671 | |
252b5132 RH |
2672 | h->got.offset = sgot->_raw_size; |
2673 | ||
2674 | /* Make sure this symbol is output as a dynamic symbol. */ | |
2675 | if (h->dynindx == -1) | |
2676 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) | |
2677 | return false; | |
2678 | ||
2679 | srelgot->_raw_size += sizeof (Elf32_External_Rel); | |
2680 | } | |
2681 | else | |
2682 | { | |
99e4ae17 | 2683 | /* This is a global offset table entry for a local |
252b5132 RH |
2684 | symbol. */ |
2685 | if (local_got_offsets == NULL) | |
2686 | { | |
dc810e39 | 2687 | bfd_size_type size; |
63b0f745 | 2688 | unsigned int i; |
252b5132 | 2689 | |
dc810e39 AM |
2690 | size = symtab_hdr->sh_info; |
2691 | size *= sizeof (bfd_vma); | |
252b5132 RH |
2692 | local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size); |
2693 | if (local_got_offsets == NULL) | |
2694 | return false; | |
2695 | elf_local_got_offsets (abfd) = local_got_offsets; | |
2696 | for (i = 0; i < symtab_hdr->sh_info; i++) | |
2697 | local_got_offsets[i] = (bfd_vma) -1; | |
2698 | } | |
f21f3fe0 | 2699 | |
252b5132 RH |
2700 | if (local_got_offsets[r_symndx] != (bfd_vma) -1) |
2701 | /* We have already allocated space in the .got. */ | |
2702 | break; | |
2703 | ||
2704 | local_got_offsets[r_symndx] = sgot->_raw_size; | |
2705 | ||
2706 | if (info->shared) | |
2707 | /* If we are generating a shared object, we need to | |
2708 | output a R_ARM_RELATIVE reloc so that the dynamic | |
2709 | linker can adjust this GOT entry. */ | |
2710 | srelgot->_raw_size += sizeof (Elf32_External_Rel); | |
2711 | } | |
2712 | ||
2713 | sgot->_raw_size += 4; | |
2714 | break; | |
2715 | ||
99e4ae17 | 2716 | case R_ARM_PLT32: |
252b5132 RH |
2717 | /* This symbol requires a procedure linkage table entry. We |
2718 | actually build the entry in adjust_dynamic_symbol, | |
2719 | because this might be a case of linking PIC code which is | |
2720 | never referenced by a dynamic object, in which case we | |
2721 | don't need to generate a procedure linkage table entry | |
2722 | after all. */ | |
2723 | ||
2724 | /* If this is a local symbol, we resolve it directly without | |
2725 | creating a procedure linkage table entry. */ | |
2726 | if (h == NULL) | |
2727 | continue; | |
2728 | ||
2729 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; | |
2730 | break; | |
2731 | ||
2732 | case R_ARM_ABS32: | |
2733 | case R_ARM_REL32: | |
2734 | case R_ARM_PC24: | |
2735 | /* If we are creating a shared library, and this is a reloc | |
2736 | against a global symbol, or a non PC relative reloc | |
2737 | against a local symbol, then we need to copy the reloc | |
2738 | into the shared library. However, if we are linking with | |
2739 | -Bsymbolic, we do not need to copy a reloc against a | |
2740 | global symbol which is defined in an object we are | |
2741 | including in the link (i.e., DEF_REGULAR is set). At | |
2742 | this point we have not seen all the input files, so it is | |
2743 | possible that DEF_REGULAR is not set now but will be set | |
2744 | later (it is never cleared). We account for that | |
2745 | possibility below by storing information in the | |
2746 | pcrel_relocs_copied field of the hash table entry. */ | |
2747 | if (info->shared | |
2748 | && (ELF32_R_TYPE (rel->r_info) != R_ARM_PC24 | |
2749 | || (h != NULL | |
2750 | && (! info->symbolic | |
2751 | || (h->elf_link_hash_flags | |
2752 | & ELF_LINK_HASH_DEF_REGULAR) == 0)))) | |
2753 | { | |
2754 | /* When creating a shared object, we must copy these | |
2755 | reloc types into the output file. We create a reloc | |
2756 | section in dynobj and make room for this reloc. */ | |
2757 | if (sreloc == NULL) | |
2758 | { | |
2759 | const char * name; | |
2760 | ||
2761 | name = (bfd_elf_string_from_elf_section | |
2762 | (abfd, | |
2763 | elf_elfheader (abfd)->e_shstrndx, | |
2764 | elf_section_data (sec)->rel_hdr.sh_name)); | |
2765 | if (name == NULL) | |
2766 | return false; | |
2767 | ||
2768 | BFD_ASSERT (strncmp (name, ".rel", 4) == 0 | |
99e4ae17 | 2769 | && strcmp (bfd_get_section_name (abfd, sec), |
252b5132 RH |
2770 | name + 4) == 0); |
2771 | ||
2772 | sreloc = bfd_get_section_by_name (dynobj, name); | |
2773 | if (sreloc == NULL) | |
2774 | { | |
2775 | flagword flags; | |
2776 | ||
2777 | sreloc = bfd_make_section (dynobj, name); | |
2778 | flags = (SEC_HAS_CONTENTS | SEC_READONLY | |
2779 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
2780 | if ((sec->flags & SEC_ALLOC) != 0) | |
2781 | flags |= SEC_ALLOC | SEC_LOAD; | |
2782 | if (sreloc == NULL | |
2783 | || ! bfd_set_section_flags (dynobj, sreloc, flags) | |
2784 | || ! bfd_set_section_alignment (dynobj, sreloc, 2)) | |
2785 | return false; | |
2786 | } | |
99e4ae17 AJ |
2787 | if (sec->flags & SEC_READONLY) |
2788 | info->flags |= DF_TEXTREL; | |
252b5132 RH |
2789 | } |
2790 | ||
2791 | sreloc->_raw_size += sizeof (Elf32_External_Rel); | |
2792 | /* If we are linking with -Bsymbolic, and this is a | |
2793 | global symbol, we count the number of PC relative | |
2794 | relocations we have entered for this symbol, so that | |
2795 | we can discard them again if the symbol is later | |
2796 | defined by a regular object. Note that this function | |
2797 | is only called if we are using an elf_i386 linker | |
2798 | hash table, which means that h is really a pointer to | |
2799 | an elf_i386_link_hash_entry. */ | |
2800 | if (h != NULL && info->symbolic | |
2801 | && ELF32_R_TYPE (rel->r_info) == R_ARM_PC24) | |
2802 | { | |
2803 | struct elf32_arm_link_hash_entry * eh; | |
2804 | struct elf32_arm_pcrel_relocs_copied * p; | |
2805 | ||
2806 | eh = (struct elf32_arm_link_hash_entry *) h; | |
2807 | ||
2808 | for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next) | |
2809 | if (p->section == sreloc) | |
2810 | break; | |
2811 | ||
2812 | if (p == NULL) | |
2813 | { | |
2814 | p = ((struct elf32_arm_pcrel_relocs_copied *) | |
dc810e39 | 2815 | bfd_alloc (dynobj, (bfd_size_type) sizeof * p)); |
252b5132 RH |
2816 | if (p == NULL) |
2817 | return false; | |
2818 | p->next = eh->pcrel_relocs_copied; | |
2819 | eh->pcrel_relocs_copied = p; | |
2820 | p->section = sreloc; | |
2821 | p->count = 0; | |
2822 | } | |
2823 | ||
2824 | ++p->count; | |
2825 | } | |
2826 | } | |
2827 | break; | |
2828 | ||
2829 | /* This relocation describes the C++ object vtable hierarchy. | |
2830 | Reconstruct it for later use during GC. */ | |
2831 | case R_ARM_GNU_VTINHERIT: | |
2832 | if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
2833 | return false; | |
2834 | break; | |
9a5aca8c | 2835 | |
252b5132 RH |
2836 | /* This relocation describes which C++ vtable entries are actually |
2837 | used. Record for later use during GC. */ | |
2838 | case R_ARM_GNU_VTENTRY: | |
d512aa07 | 2839 | if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_offset)) |
252b5132 RH |
2840 | return false; |
2841 | break; | |
2842 | } | |
2843 | } | |
f21f3fe0 | 2844 | |
252b5132 RH |
2845 | return true; |
2846 | } | |
2847 | ||
252b5132 RH |
2848 | /* Find the nearest line to a particular section and offset, for error |
2849 | reporting. This code is a duplicate of the code in elf.c, except | |
9b485d32 | 2850 | that it also accepts STT_ARM_TFUNC as a symbol that names a function. */ |
252b5132 RH |
2851 | |
2852 | static boolean | |
2853 | elf32_arm_find_nearest_line | |
2854 | (abfd, section, symbols, offset, filename_ptr, functionname_ptr, line_ptr) | |
2855 | bfd * abfd; | |
2856 | asection * section; | |
2857 | asymbol ** symbols; | |
2858 | bfd_vma offset; | |
917583ad NC |
2859 | const char ** filename_ptr; |
2860 | const char ** functionname_ptr; | |
252b5132 RH |
2861 | unsigned int * line_ptr; |
2862 | { | |
2863 | boolean found; | |
2864 | const char * filename; | |
2865 | asymbol * func; | |
2866 | bfd_vma low_func; | |
2867 | asymbol ** p; | |
2868 | ||
2869 | if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset, | |
f21f3fe0 | 2870 | filename_ptr, functionname_ptr, |
857ec808 NC |
2871 | line_ptr, 0, |
2872 | &elf_tdata (abfd)->dwarf2_find_line_info)) | |
252b5132 RH |
2873 | return true; |
2874 | ||
2875 | if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset, | |
2876 | &found, filename_ptr, | |
2877 | functionname_ptr, line_ptr, | |
2878 | &elf_tdata (abfd)->line_info)) | |
2879 | return false; | |
f21f3fe0 | 2880 | |
252b5132 RH |
2881 | if (found) |
2882 | return true; | |
2883 | ||
2884 | if (symbols == NULL) | |
2885 | return false; | |
2886 | ||
2887 | filename = NULL; | |
2888 | func = NULL; | |
2889 | low_func = 0; | |
2890 | ||
2891 | for (p = symbols; *p != NULL; p++) | |
2892 | { | |
2893 | elf_symbol_type *q; | |
2894 | ||
2895 | q = (elf_symbol_type *) *p; | |
2896 | ||
2897 | if (bfd_get_section (&q->symbol) != section) | |
2898 | continue; | |
2899 | ||
2900 | switch (ELF_ST_TYPE (q->internal_elf_sym.st_info)) | |
2901 | { | |
2902 | default: | |
2903 | break; | |
2904 | case STT_FILE: | |
2905 | filename = bfd_asymbol_name (&q->symbol); | |
2906 | break; | |
2907 | case STT_NOTYPE: | |
2908 | case STT_FUNC: | |
2909 | case STT_ARM_TFUNC: | |
2910 | if (q->symbol.section == section | |
2911 | && q->symbol.value >= low_func | |
2912 | && q->symbol.value <= offset) | |
2913 | { | |
2914 | func = (asymbol *) q; | |
2915 | low_func = q->symbol.value; | |
2916 | } | |
2917 | break; | |
2918 | } | |
2919 | } | |
2920 | ||
2921 | if (func == NULL) | |
2922 | return false; | |
2923 | ||
2924 | *filename_ptr = filename; | |
2925 | *functionname_ptr = bfd_asymbol_name (func); | |
2926 | *line_ptr = 0; | |
f21f3fe0 | 2927 | |
252b5132 RH |
2928 | return true; |
2929 | } | |
2930 | ||
2931 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
2932 | regular object. The current definition is in some section of the | |
2933 | dynamic object, but we're not including those sections. We have to | |
2934 | change the definition to something the rest of the link can | |
2935 | understand. */ | |
2936 | ||
2937 | static boolean | |
2938 | elf32_arm_adjust_dynamic_symbol (info, h) | |
2939 | struct bfd_link_info * info; | |
2940 | struct elf_link_hash_entry * h; | |
2941 | { | |
2942 | bfd * dynobj; | |
2943 | asection * s; | |
2944 | unsigned int power_of_two; | |
2945 | ||
2946 | dynobj = elf_hash_table (info)->dynobj; | |
2947 | ||
2948 | /* Make sure we know what is going on here. */ | |
2949 | BFD_ASSERT (dynobj != NULL | |
2950 | && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) | |
2951 | || h->weakdef != NULL | |
2952 | || ((h->elf_link_hash_flags | |
2953 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
2954 | && (h->elf_link_hash_flags | |
2955 | & ELF_LINK_HASH_REF_REGULAR) != 0 | |
2956 | && (h->elf_link_hash_flags | |
2957 | & ELF_LINK_HASH_DEF_REGULAR) == 0))); | |
2958 | ||
2959 | /* If this is a function, put it in the procedure linkage table. We | |
2960 | will fill in the contents of the procedure linkage table later, | |
2961 | when we know the address of the .got section. */ | |
2962 | if (h->type == STT_FUNC | |
2963 | || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) | |
2964 | { | |
2965 | if (! info->shared | |
2966 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
2967 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0) | |
2968 | { | |
2969 | /* This case can occur if we saw a PLT32 reloc in an input | |
2970 | file, but the symbol was never referred to by a dynamic | |
2971 | object. In such a case, we don't actually need to build | |
2972 | a procedure linkage table, and we can just do a PC32 | |
2973 | reloc instead. */ | |
2974 | BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0); | |
2975 | return true; | |
2976 | } | |
2977 | ||
2978 | /* Make sure this symbol is output as a dynamic symbol. */ | |
2979 | if (h->dynindx == -1) | |
2980 | { | |
2981 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) | |
2982 | return false; | |
2983 | } | |
2984 | ||
2985 | s = bfd_get_section_by_name (dynobj, ".plt"); | |
2986 | BFD_ASSERT (s != NULL); | |
2987 | ||
2988 | /* If this is the first .plt entry, make room for the special | |
2989 | first entry. */ | |
2990 | if (s->_raw_size == 0) | |
2991 | s->_raw_size += PLT_ENTRY_SIZE; | |
2992 | ||
2993 | /* If this symbol is not defined in a regular file, and we are | |
2994 | not generating a shared library, then set the symbol to this | |
2995 | location in the .plt. This is required to make function | |
2996 | pointers compare as equal between the normal executable and | |
2997 | the shared library. */ | |
2998 | if (! info->shared | |
2999 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
3000 | { | |
3001 | h->root.u.def.section = s; | |
3002 | h->root.u.def.value = s->_raw_size; | |
3003 | } | |
3004 | ||
3005 | h->plt.offset = s->_raw_size; | |
3006 | ||
3007 | /* Make room for this entry. */ | |
3008 | s->_raw_size += PLT_ENTRY_SIZE; | |
3009 | ||
3010 | /* We also need to make an entry in the .got.plt section, which | |
3011 | will be placed in the .got section by the linker script. */ | |
252b5132 RH |
3012 | s = bfd_get_section_by_name (dynobj, ".got.plt"); |
3013 | BFD_ASSERT (s != NULL); | |
3014 | s->_raw_size += 4; | |
3015 | ||
3016 | /* We also need to make an entry in the .rel.plt section. */ | |
3017 | ||
3018 | s = bfd_get_section_by_name (dynobj, ".rel.plt"); | |
3019 | BFD_ASSERT (s != NULL); | |
3020 | s->_raw_size += sizeof (Elf32_External_Rel); | |
3021 | ||
3022 | return true; | |
3023 | } | |
3024 | ||
3025 | /* If this is a weak symbol, and there is a real definition, the | |
3026 | processor independent code will have arranged for us to see the | |
3027 | real definition first, and we can just use the same value. */ | |
3028 | if (h->weakdef != NULL) | |
3029 | { | |
3030 | BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined | |
3031 | || h->weakdef->root.type == bfd_link_hash_defweak); | |
3032 | h->root.u.def.section = h->weakdef->root.u.def.section; | |
3033 | h->root.u.def.value = h->weakdef->root.u.def.value; | |
3034 | return true; | |
3035 | } | |
3036 | ||
3037 | /* This is a reference to a symbol defined by a dynamic object which | |
3038 | is not a function. */ | |
3039 | ||
3040 | /* If we are creating a shared library, we must presume that the | |
3041 | only references to the symbol are via the global offset table. | |
3042 | For such cases we need not do anything here; the relocations will | |
3043 | be handled correctly by relocate_section. */ | |
3044 | if (info->shared) | |
3045 | return true; | |
3046 | ||
3047 | /* We must allocate the symbol in our .dynbss section, which will | |
3048 | become part of the .bss section of the executable. There will be | |
3049 | an entry for this symbol in the .dynsym section. The dynamic | |
3050 | object will contain position independent code, so all references | |
3051 | from the dynamic object to this symbol will go through the global | |
3052 | offset table. The dynamic linker will use the .dynsym entry to | |
3053 | determine the address it must put in the global offset table, so | |
3054 | both the dynamic object and the regular object will refer to the | |
3055 | same memory location for the variable. */ | |
252b5132 RH |
3056 | s = bfd_get_section_by_name (dynobj, ".dynbss"); |
3057 | BFD_ASSERT (s != NULL); | |
3058 | ||
3059 | /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to | |
3060 | copy the initial value out of the dynamic object and into the | |
3061 | runtime process image. We need to remember the offset into the | |
3062 | .rel.bss section we are going to use. */ | |
3063 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) | |
3064 | { | |
3065 | asection *srel; | |
3066 | ||
3067 | srel = bfd_get_section_by_name (dynobj, ".rel.bss"); | |
3068 | BFD_ASSERT (srel != NULL); | |
3069 | srel->_raw_size += sizeof (Elf32_External_Rel); | |
3070 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; | |
3071 | } | |
3072 | ||
3073 | /* We need to figure out the alignment required for this symbol. I | |
3074 | have no idea how ELF linkers handle this. */ | |
3075 | power_of_two = bfd_log2 (h->size); | |
3076 | if (power_of_two > 3) | |
3077 | power_of_two = 3; | |
3078 | ||
3079 | /* Apply the required alignment. */ | |
3080 | s->_raw_size = BFD_ALIGN (s->_raw_size, | |
3081 | (bfd_size_type) (1 << power_of_two)); | |
3082 | if (power_of_two > bfd_get_section_alignment (dynobj, s)) | |
3083 | { | |
3084 | if (! bfd_set_section_alignment (dynobj, s, power_of_two)) | |
3085 | return false; | |
3086 | } | |
3087 | ||
3088 | /* Define the symbol as being at this point in the section. */ | |
3089 | h->root.u.def.section = s; | |
3090 | h->root.u.def.value = s->_raw_size; | |
3091 | ||
3092 | /* Increment the section size to make room for the symbol. */ | |
3093 | s->_raw_size += h->size; | |
3094 | ||
3095 | return true; | |
3096 | } | |
3097 | ||
3098 | /* Set the sizes of the dynamic sections. */ | |
3099 | ||
3100 | static boolean | |
3101 | elf32_arm_size_dynamic_sections (output_bfd, info) | |
99e4ae17 | 3102 | bfd * output_bfd ATTRIBUTE_UNUSED; |
252b5132 RH |
3103 | struct bfd_link_info * info; |
3104 | { | |
3105 | bfd * dynobj; | |
3106 | asection * s; | |
3107 | boolean plt; | |
3108 | boolean relocs; | |
252b5132 RH |
3109 | |
3110 | dynobj = elf_hash_table (info)->dynobj; | |
3111 | BFD_ASSERT (dynobj != NULL); | |
3112 | ||
3113 | if (elf_hash_table (info)->dynamic_sections_created) | |
3114 | { | |
3115 | /* Set the contents of the .interp section to the interpreter. */ | |
3116 | if (! info->shared) | |
3117 | { | |
3118 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
3119 | BFD_ASSERT (s != NULL); | |
3120 | s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; | |
3121 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
3122 | } | |
3123 | } | |
3124 | else | |
3125 | { | |
3126 | /* We may have created entries in the .rel.got section. | |
3127 | However, if we are not creating the dynamic sections, we will | |
3128 | not actually use these entries. Reset the size of .rel.got, | |
3129 | which will cause it to get stripped from the output file | |
3130 | below. */ | |
3131 | s = bfd_get_section_by_name (dynobj, ".rel.got"); | |
3132 | if (s != NULL) | |
3133 | s->_raw_size = 0; | |
3134 | } | |
3135 | ||
3136 | /* If this is a -Bsymbolic shared link, then we need to discard all | |
3137 | PC relative relocs against symbols defined in a regular object. | |
3138 | We allocated space for them in the check_relocs routine, but we | |
3139 | will not fill them in in the relocate_section routine. */ | |
3140 | if (info->shared && info->symbolic) | |
3141 | elf32_arm_link_hash_traverse (elf32_arm_hash_table (info), | |
3142 | elf32_arm_discard_copies, | |
3143 | (PTR) NULL); | |
3144 | ||
3145 | /* The check_relocs and adjust_dynamic_symbol entry points have | |
3146 | determined the sizes of the various dynamic sections. Allocate | |
3147 | memory for them. */ | |
3148 | plt = false; | |
3149 | relocs = false; | |
252b5132 RH |
3150 | for (s = dynobj->sections; s != NULL; s = s->next) |
3151 | { | |
3152 | const char * name; | |
3153 | boolean strip; | |
3154 | ||
3155 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
3156 | continue; | |
3157 | ||
3158 | /* It's OK to base decisions on the section name, because none | |
3159 | of the dynobj section names depend upon the input files. */ | |
3160 | name = bfd_get_section_name (dynobj, s); | |
3161 | ||
3162 | strip = false; | |
3163 | ||
3164 | if (strcmp (name, ".plt") == 0) | |
3165 | { | |
3166 | if (s->_raw_size == 0) | |
3167 | { | |
3168 | /* Strip this section if we don't need it; see the | |
3169 | comment below. */ | |
3170 | strip = true; | |
3171 | } | |
3172 | else | |
3173 | { | |
3174 | /* Remember whether there is a PLT. */ | |
3175 | plt = true; | |
3176 | } | |
3177 | } | |
3178 | else if (strncmp (name, ".rel", 4) == 0) | |
3179 | { | |
3180 | if (s->_raw_size == 0) | |
3181 | { | |
3182 | /* If we don't need this section, strip it from the | |
3183 | output file. This is mostly to handle .rel.bss and | |
3184 | .rel.plt. We must create both sections in | |
3185 | create_dynamic_sections, because they must be created | |
3186 | before the linker maps input sections to output | |
3187 | sections. The linker does that before | |
3188 | adjust_dynamic_symbol is called, and it is that | |
3189 | function which decides whether anything needs to go | |
3190 | into these sections. */ | |
3191 | strip = true; | |
3192 | } | |
3193 | else | |
3194 | { | |
252b5132 RH |
3195 | /* Remember whether there are any reloc sections other |
3196 | than .rel.plt. */ | |
3197 | if (strcmp (name, ".rel.plt") != 0) | |
99e4ae17 | 3198 | relocs = true; |
252b5132 RH |
3199 | |
3200 | /* We use the reloc_count field as a counter if we need | |
3201 | to copy relocs into the output file. */ | |
3202 | s->reloc_count = 0; | |
3203 | } | |
3204 | } | |
3205 | else if (strncmp (name, ".got", 4) != 0) | |
3206 | { | |
3207 | /* It's not one of our sections, so don't allocate space. */ | |
3208 | continue; | |
3209 | } | |
3210 | ||
3211 | if (strip) | |
3212 | { | |
3213 | asection ** spp; | |
3214 | ||
3215 | for (spp = &s->output_section->owner->sections; | |
c601ffdb | 3216 | *spp != NULL; |
252b5132 | 3217 | spp = &(*spp)->next) |
c601ffdb AM |
3218 | { |
3219 | if (*spp == s->output_section) | |
3220 | { | |
3221 | bfd_section_list_remove (s->output_section->owner, spp); | |
3222 | --s->output_section->owner->section_count; | |
3223 | break; | |
3224 | } | |
3225 | } | |
252b5132 RH |
3226 | continue; |
3227 | } | |
3228 | ||
3229 | /* Allocate memory for the section contents. */ | |
3230 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); | |
3231 | if (s->contents == NULL && s->_raw_size != 0) | |
3232 | return false; | |
3233 | } | |
3234 | ||
3235 | if (elf_hash_table (info)->dynamic_sections_created) | |
3236 | { | |
3237 | /* Add some entries to the .dynamic section. We fill in the | |
3238 | values later, in elf32_arm_finish_dynamic_sections, but we | |
3239 | must add the entries now so that we get the correct size for | |
3240 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
3241 | dynamic linker and used by the debugger. */ | |
dc810e39 AM |
3242 | #define add_dynamic_entry(TAG, VAL) \ |
3243 | bfd_elf32_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL)) | |
3244 | ||
3245 | if (!info->shared) | |
252b5132 | 3246 | { |
dc810e39 | 3247 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
252b5132 RH |
3248 | return false; |
3249 | } | |
3250 | ||
3251 | if (plt) | |
3252 | { | |
dc810e39 AM |
3253 | if ( !add_dynamic_entry (DT_PLTGOT, 0) |
3254 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
3255 | || !add_dynamic_entry (DT_PLTREL, DT_REL) | |
3256 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
252b5132 RH |
3257 | return false; |
3258 | } | |
3259 | ||
3260 | if (relocs) | |
3261 | { | |
dc810e39 AM |
3262 | if ( !add_dynamic_entry (DT_REL, 0) |
3263 | || !add_dynamic_entry (DT_RELSZ, 0) | |
3264 | || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel))) | |
252b5132 RH |
3265 | return false; |
3266 | } | |
3267 | ||
99e4ae17 | 3268 | if ((info->flags & DF_TEXTREL) != 0) |
252b5132 | 3269 | { |
dc810e39 | 3270 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
252b5132 | 3271 | return false; |
d6cf2879 | 3272 | info->flags |= DF_TEXTREL; |
252b5132 RH |
3273 | } |
3274 | } | |
dc810e39 | 3275 | #undef add_synamic_entry |
252b5132 RH |
3276 | |
3277 | return true; | |
3278 | } | |
3279 | ||
3280 | /* This function is called via elf32_arm_link_hash_traverse if we are | |
3281 | creating a shared object with -Bsymbolic. It discards the space | |
3282 | allocated to copy PC relative relocs against symbols which are | |
3283 | defined in regular objects. We allocated space for them in the | |
3284 | check_relocs routine, but we won't fill them in in the | |
3285 | relocate_section routine. */ | |
3286 | ||
3287 | static boolean | |
3288 | elf32_arm_discard_copies (h, ignore) | |
3289 | struct elf32_arm_link_hash_entry * h; | |
5f771d47 | 3290 | PTR ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
3291 | { |
3292 | struct elf32_arm_pcrel_relocs_copied * s; | |
3293 | ||
e92d460e AM |
3294 | if (h->root.root.type == bfd_link_hash_warning) |
3295 | h = (struct elf32_arm_link_hash_entry *) h->root.root.u.i.link; | |
3296 | ||
252b5132 RH |
3297 | /* We only discard relocs for symbols defined in a regular object. */ |
3298 | if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
3299 | return true; | |
3300 | ||
3301 | for (s = h->pcrel_relocs_copied; s != NULL; s = s->next) | |
3302 | s->section->_raw_size -= s->count * sizeof (Elf32_External_Rel); | |
3303 | ||
3304 | return true; | |
3305 | } | |
3306 | ||
3307 | /* Finish up dynamic symbol handling. We set the contents of various | |
3308 | dynamic sections here. */ | |
3309 | ||
3310 | static boolean | |
3311 | elf32_arm_finish_dynamic_symbol (output_bfd, info, h, sym) | |
3312 | bfd * output_bfd; | |
3313 | struct bfd_link_info * info; | |
3314 | struct elf_link_hash_entry * h; | |
3315 | Elf_Internal_Sym * sym; | |
3316 | { | |
3317 | bfd * dynobj; | |
3318 | ||
3319 | dynobj = elf_hash_table (info)->dynobj; | |
3320 | ||
3321 | if (h->plt.offset != (bfd_vma) -1) | |
3322 | { | |
3323 | asection * splt; | |
3324 | asection * sgot; | |
3325 | asection * srel; | |
3326 | bfd_vma plt_index; | |
3327 | bfd_vma got_offset; | |
3328 | Elf_Internal_Rel rel; | |
3329 | ||
3330 | /* This symbol has an entry in the procedure linkage table. Set | |
3331 | it up. */ | |
3332 | ||
3333 | BFD_ASSERT (h->dynindx != -1); | |
3334 | ||
3335 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
3336 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); | |
3337 | srel = bfd_get_section_by_name (dynobj, ".rel.plt"); | |
3338 | BFD_ASSERT (splt != NULL && sgot != NULL && srel != NULL); | |
3339 | ||
3340 | /* Get the index in the procedure linkage table which | |
3341 | corresponds to this symbol. This is the index of this symbol | |
3342 | in all the symbols for which we are making plt entries. The | |
3343 | first entry in the procedure linkage table is reserved. */ | |
3344 | plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; | |
3345 | ||
3346 | /* Get the offset into the .got table of the entry that | |
3347 | corresponds to this function. Each .got entry is 4 bytes. | |
3348 | The first three are reserved. */ | |
3349 | got_offset = (plt_index + 3) * 4; | |
3350 | ||
3351 | /* Fill in the entry in the procedure linkage table. */ | |
f7a74f8c NC |
3352 | bfd_put_32 (output_bfd, elf32_arm_plt_entry[0], |
3353 | splt->contents + h->plt.offset + 0); | |
3354 | bfd_put_32 (output_bfd, elf32_arm_plt_entry[1], | |
3355 | splt->contents + h->plt.offset + 4); | |
3356 | bfd_put_32 (output_bfd, elf32_arm_plt_entry[2], | |
3357 | splt->contents + h->plt.offset + 8); | |
252b5132 RH |
3358 | bfd_put_32 (output_bfd, |
3359 | (sgot->output_section->vma | |
3360 | + sgot->output_offset | |
f21f3fe0 | 3361 | + got_offset |
252b5132 RH |
3362 | - splt->output_section->vma |
3363 | - splt->output_offset | |
3364 | - h->plt.offset - 12), | |
3365 | splt->contents + h->plt.offset + 12); | |
3366 | ||
3367 | /* Fill in the entry in the global offset table. */ | |
3368 | bfd_put_32 (output_bfd, | |
3369 | (splt->output_section->vma | |
3370 | + splt->output_offset), | |
3371 | sgot->contents + got_offset); | |
3372 | ||
3373 | /* Fill in the entry in the .rel.plt section. */ | |
3374 | rel.r_offset = (sgot->output_section->vma | |
3375 | + sgot->output_offset | |
3376 | + got_offset); | |
3377 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT); | |
3378 | bfd_elf32_swap_reloc_out (output_bfd, &rel, | |
3379 | ((Elf32_External_Rel *) srel->contents | |
3380 | + plt_index)); | |
3381 | ||
3382 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
3383 | { | |
3384 | /* Mark the symbol as undefined, rather than as defined in | |
3385 | the .plt section. Leave the value alone. */ | |
3386 | sym->st_shndx = SHN_UNDEF; | |
d982ba73 PB |
3387 | /* If the symbol is weak, we do need to clear the value. |
3388 | Otherwise, the PLT entry would provide a definition for | |
3389 | the symbol even if the symbol wasn't defined anywhere, | |
3390 | and so the symbol would never be NULL. */ | |
3391 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR_NONWEAK) | |
3392 | == 0) | |
3393 | sym->st_value = 0; | |
252b5132 RH |
3394 | } |
3395 | } | |
3396 | ||
3397 | if (h->got.offset != (bfd_vma) -1) | |
3398 | { | |
3399 | asection * sgot; | |
3400 | asection * srel; | |
3401 | Elf_Internal_Rel rel; | |
3402 | ||
3403 | /* This symbol has an entry in the global offset table. Set it | |
3404 | up. */ | |
252b5132 RH |
3405 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
3406 | srel = bfd_get_section_by_name (dynobj, ".rel.got"); | |
3407 | BFD_ASSERT (sgot != NULL && srel != NULL); | |
3408 | ||
3409 | rel.r_offset = (sgot->output_section->vma | |
3410 | + sgot->output_offset | |
dc810e39 | 3411 | + (h->got.offset &~ (bfd_vma) 1)); |
252b5132 RH |
3412 | |
3413 | /* If this is a -Bsymbolic link, and the symbol is defined | |
3414 | locally, we just want to emit a RELATIVE reloc. The entry in | |
3415 | the global offset table will already have been initialized in | |
3416 | the relocate_section function. */ | |
3417 | if (info->shared | |
3418 | && (info->symbolic || h->dynindx == -1) | |
3419 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) | |
3420 | rel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE); | |
3421 | else | |
3422 | { | |
3423 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset); | |
3424 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT); | |
3425 | } | |
3426 | ||
3427 | bfd_elf32_swap_reloc_out (output_bfd, &rel, | |
3428 | ((Elf32_External_Rel *) srel->contents | |
3429 | + srel->reloc_count)); | |
3430 | ++srel->reloc_count; | |
3431 | } | |
3432 | ||
3433 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) | |
3434 | { | |
3435 | asection * s; | |
3436 | Elf_Internal_Rel rel; | |
3437 | ||
3438 | /* This symbol needs a copy reloc. Set it up. */ | |
252b5132 RH |
3439 | BFD_ASSERT (h->dynindx != -1 |
3440 | && (h->root.type == bfd_link_hash_defined | |
3441 | || h->root.type == bfd_link_hash_defweak)); | |
3442 | ||
3443 | s = bfd_get_section_by_name (h->root.u.def.section->owner, | |
3444 | ".rel.bss"); | |
3445 | BFD_ASSERT (s != NULL); | |
3446 | ||
3447 | rel.r_offset = (h->root.u.def.value | |
3448 | + h->root.u.def.section->output_section->vma | |
3449 | + h->root.u.def.section->output_offset); | |
3450 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY); | |
3451 | bfd_elf32_swap_reloc_out (output_bfd, &rel, | |
3452 | ((Elf32_External_Rel *) s->contents | |
3453 | + s->reloc_count)); | |
3454 | ++s->reloc_count; | |
3455 | } | |
3456 | ||
3457 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
3458 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
3459 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
3460 | sym->st_shndx = SHN_ABS; | |
3461 | ||
3462 | return true; | |
3463 | } | |
3464 | ||
3465 | /* Finish up the dynamic sections. */ | |
3466 | ||
3467 | static boolean | |
3468 | elf32_arm_finish_dynamic_sections (output_bfd, info) | |
3469 | bfd * output_bfd; | |
3470 | struct bfd_link_info * info; | |
3471 | { | |
3472 | bfd * dynobj; | |
3473 | asection * sgot; | |
3474 | asection * sdyn; | |
3475 | ||
3476 | dynobj = elf_hash_table (info)->dynobj; | |
3477 | ||
3478 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); | |
3479 | BFD_ASSERT (sgot != NULL); | |
3480 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); | |
3481 | ||
3482 | if (elf_hash_table (info)->dynamic_sections_created) | |
3483 | { | |
3484 | asection *splt; | |
3485 | Elf32_External_Dyn *dyncon, *dynconend; | |
3486 | ||
3487 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
3488 | BFD_ASSERT (splt != NULL && sdyn != NULL); | |
3489 | ||
3490 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
3491 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size); | |
9b485d32 | 3492 | |
252b5132 RH |
3493 | for (; dyncon < dynconend; dyncon++) |
3494 | { | |
3495 | Elf_Internal_Dyn dyn; | |
3496 | const char * name; | |
3497 | asection * s; | |
3498 | ||
3499 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
3500 | ||
3501 | switch (dyn.d_tag) | |
3502 | { | |
3503 | default: | |
3504 | break; | |
3505 | ||
3506 | case DT_PLTGOT: | |
3507 | name = ".got"; | |
3508 | goto get_vma; | |
3509 | case DT_JMPREL: | |
3510 | name = ".rel.plt"; | |
3511 | get_vma: | |
3512 | s = bfd_get_section_by_name (output_bfd, name); | |
3513 | BFD_ASSERT (s != NULL); | |
3514 | dyn.d_un.d_ptr = s->vma; | |
3515 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
3516 | break; | |
3517 | ||
3518 | case DT_PLTRELSZ: | |
3519 | s = bfd_get_section_by_name (output_bfd, ".rel.plt"); | |
3520 | BFD_ASSERT (s != NULL); | |
3521 | if (s->_cooked_size != 0) | |
3522 | dyn.d_un.d_val = s->_cooked_size; | |
3523 | else | |
3524 | dyn.d_un.d_val = s->_raw_size; | |
3525 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
3526 | break; | |
3527 | ||
3528 | case DT_RELSZ: | |
3529 | /* My reading of the SVR4 ABI indicates that the | |
3530 | procedure linkage table relocs (DT_JMPREL) should be | |
3531 | included in the overall relocs (DT_REL). This is | |
3532 | what Solaris does. However, UnixWare can not handle | |
3533 | that case. Therefore, we override the DT_RELSZ entry | |
3534 | here to make it not include the JMPREL relocs. Since | |
3535 | the linker script arranges for .rel.plt to follow all | |
3536 | other relocation sections, we don't have to worry | |
3537 | about changing the DT_REL entry. */ | |
3538 | s = bfd_get_section_by_name (output_bfd, ".rel.plt"); | |
3539 | if (s != NULL) | |
3540 | { | |
3541 | if (s->_cooked_size != 0) | |
3542 | dyn.d_un.d_val -= s->_cooked_size; | |
3543 | else | |
3544 | dyn.d_un.d_val -= s->_raw_size; | |
3545 | } | |
3546 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
3547 | break; | |
3548 | } | |
3549 | } | |
3550 | ||
3551 | /* Fill in the first entry in the procedure linkage table. */ | |
3552 | if (splt->_raw_size > 0) | |
f7a74f8c NC |
3553 | { |
3554 | bfd_put_32 (output_bfd, elf32_arm_plt0_entry[0], splt->contents + 0); | |
3555 | bfd_put_32 (output_bfd, elf32_arm_plt0_entry[1], splt->contents + 4); | |
3556 | bfd_put_32 (output_bfd, elf32_arm_plt0_entry[2], splt->contents + 8); | |
3557 | bfd_put_32 (output_bfd, elf32_arm_plt0_entry[3], splt->contents + 12); | |
3558 | } | |
252b5132 RH |
3559 | |
3560 | /* UnixWare sets the entsize of .plt to 4, although that doesn't | |
3561 | really seem like the right value. */ | |
3562 | elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4; | |
3563 | } | |
3564 | ||
3565 | /* Fill in the first three entries in the global offset table. */ | |
3566 | if (sgot->_raw_size > 0) | |
3567 | { | |
3568 | if (sdyn == NULL) | |
3569 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); | |
3570 | else | |
3571 | bfd_put_32 (output_bfd, | |
3572 | sdyn->output_section->vma + sdyn->output_offset, | |
3573 | sgot->contents); | |
3574 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); | |
3575 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); | |
3576 | } | |
3577 | ||
3578 | elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; | |
3579 | ||
3580 | return true; | |
3581 | } | |
3582 | ||
ba96a88f NC |
3583 | static void |
3584 | elf32_arm_post_process_headers (abfd, link_info) | |
3585 | bfd * abfd; | |
5f771d47 | 3586 | struct bfd_link_info * link_info ATTRIBUTE_UNUSED; |
ba96a88f | 3587 | { |
9b485d32 | 3588 | Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */ |
ba96a88f NC |
3589 | |
3590 | i_ehdrp = elf_elfheader (abfd); | |
3591 | ||
3592 | i_ehdrp->e_ident[EI_OSABI] = ARM_ELF_OS_ABI_VERSION; | |
3593 | i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION; | |
3594 | } | |
3595 | ||
99e4ae17 | 3596 | static enum elf_reloc_type_class |
f51e552e AM |
3597 | elf32_arm_reloc_type_class (rela) |
3598 | const Elf_Internal_Rela *rela; | |
99e4ae17 | 3599 | { |
f51e552e | 3600 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
99e4ae17 AJ |
3601 | { |
3602 | case R_ARM_RELATIVE: | |
3603 | return reloc_class_relative; | |
3604 | case R_ARM_JUMP_SLOT: | |
3605 | return reloc_class_plt; | |
3606 | case R_ARM_COPY: | |
3607 | return reloc_class_copy; | |
3608 | default: | |
3609 | return reloc_class_normal; | |
3610 | } | |
3611 | } | |
3612 | ||
3613 | ||
252b5132 RH |
3614 | #define ELF_ARCH bfd_arch_arm |
3615 | #define ELF_MACHINE_CODE EM_ARM | |
f21f3fe0 | 3616 | #define ELF_MAXPAGESIZE 0x8000 |
252b5132 | 3617 | |
99e4ae17 AJ |
3618 | #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data |
3619 | #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data | |
252b5132 RH |
3620 | #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags |
3621 | #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data | |
3622 | #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create | |
dc810e39 | 3623 | #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup |
252b5132 RH |
3624 | #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line |
3625 | ||
3626 | #define elf_backend_get_symbol_type elf32_arm_get_symbol_type | |
3627 | #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook | |
3628 | #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook | |
3629 | #define elf_backend_check_relocs elf32_arm_check_relocs | |
dc810e39 | 3630 | #define elf_backend_relocate_section elf32_arm_relocate_section |
252b5132 RH |
3631 | #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol |
3632 | #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections | |
3633 | #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol | |
3634 | #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections | |
3635 | #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections | |
ba96a88f | 3636 | #define elf_backend_post_process_headers elf32_arm_post_process_headers |
99e4ae17 | 3637 | #define elf_backend_reloc_type_class elf32_arm_reloc_type_class |
252b5132 RH |
3638 | |
3639 | #define elf_backend_can_gc_sections 1 | |
3640 | #define elf_backend_plt_readonly 1 | |
3641 | #define elf_backend_want_got_plt 1 | |
3642 | #define elf_backend_want_plt_sym 0 | |
b491616a AM |
3643 | #ifndef USE_REL |
3644 | #define elf_backend_rela_normal 1 | |
3645 | #endif | |
252b5132 | 3646 | |
04f7c78d NC |
3647 | #define elf_backend_got_header_size 12 |
3648 | #define elf_backend_plt_header_size PLT_ENTRY_SIZE | |
3649 | ||
252b5132 | 3650 | #include "elf32-target.h" |