Commit | Line | Data |
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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 | ||
acf8aed4 AM |
20 | #ifndef USE_REL |
21 | #define USE_REL 0 | |
22 | #endif | |
23 | ||
252b5132 RH |
24 | typedef unsigned long int insn32; |
25 | typedef unsigned short int insn16; | |
26 | ||
b34976b6 | 27 | static bfd_boolean elf32_arm_set_private_flags |
252b5132 | 28 | PARAMS ((bfd *, flagword)); |
b34976b6 | 29 | static bfd_boolean elf32_arm_copy_private_bfd_data |
252b5132 | 30 | PARAMS ((bfd *, bfd *)); |
b34976b6 | 31 | static bfd_boolean elf32_arm_merge_private_bfd_data |
252b5132 | 32 | PARAMS ((bfd *, bfd *)); |
b34976b6 | 33 | static bfd_boolean elf32_arm_print_private_bfd_data |
252b5132 | 34 | PARAMS ((bfd *, PTR)); |
f21f3fe0 | 35 | static int elf32_arm_get_symbol_type |
252b5132 RH |
36 | PARAMS (( Elf_Internal_Sym *, int)); |
37 | static struct bfd_link_hash_table *elf32_arm_link_hash_table_create | |
38 | PARAMS ((bfd *)); | |
39 | static bfd_reloc_status_type elf32_arm_final_link_relocate | |
780a67af NC |
40 | PARAMS ((reloc_howto_type *, bfd *, bfd *, asection *, bfd_byte *, |
41 | Elf_Internal_Rela *, bfd_vma, struct bfd_link_info *, asection *, | |
dc810e39 | 42 | const char *, int, struct elf_link_hash_entry *)); |
252b5132 RH |
43 | static insn32 insert_thumb_branch |
44 | PARAMS ((insn32, int)); | |
45 | static struct elf_link_hash_entry *find_thumb_glue | |
917583ad | 46 | PARAMS ((struct bfd_link_info *, const char *, bfd *)); |
252b5132 | 47 | static struct elf_link_hash_entry *find_arm_glue |
917583ad | 48 | PARAMS ((struct bfd_link_info *, const char *, bfd *)); |
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)); | |
b34976b6 | 57 | static bfd_boolean elf32_arm_relocate_section |
917583ad NC |
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 | |
1e2f5b6e | 61 | PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *, |
917583ad | 62 | struct elf_link_hash_entry *, Elf_Internal_Sym *)); |
b34976b6 | 63 | static bfd_boolean elf32_arm_gc_sweep_hook |
917583ad NC |
64 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
65 | const Elf_Internal_Rela *)); | |
b34976b6 | 66 | static bfd_boolean elf32_arm_check_relocs |
917583ad NC |
67 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
68 | const Elf_Internal_Rela *)); | |
b34976b6 | 69 | static bfd_boolean elf32_arm_find_nearest_line |
917583ad NC |
70 | PARAMS ((bfd *, asection *, asymbol **, bfd_vma, const char **, |
71 | const char **, unsigned int *)); | |
b34976b6 | 72 | static bfd_boolean elf32_arm_adjust_dynamic_symbol |
917583ad | 73 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); |
b34976b6 | 74 | static bfd_boolean elf32_arm_size_dynamic_sections |
917583ad | 75 | PARAMS ((bfd *, struct bfd_link_info *)); |
b34976b6 | 76 | static bfd_boolean elf32_arm_finish_dynamic_symbol |
917583ad NC |
77 | PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, |
78 | Elf_Internal_Sym *)); | |
b34976b6 | 79 | static bfd_boolean elf32_arm_finish_dynamic_sections |
917583ad NC |
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 *)); | |
acf8aed4 | 83 | #if USE_REL |
917583ad NC |
84 | static void arm_add_to_rel |
85 | PARAMS ((bfd *, bfd_byte *, reloc_howto_type *, bfd_signed_vma)); | |
86 | #endif | |
7e392df6 NC |
87 | static enum elf_reloc_type_class elf32_arm_reloc_type_class |
88 | PARAMS ((const Elf_Internal_Rela *)); | |
252b5132 | 89 | |
7e392df6 NC |
90 | #ifndef ELFARM_NABI_C_INCLUDED |
91 | static void record_arm_to_thumb_glue | |
92 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); | |
93 | static void record_thumb_to_arm_glue | |
94 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); | |
b34976b6 | 95 | bfd_boolean bfd_elf32_arm_allocate_interworking_sections |
917583ad | 96 | PARAMS ((struct bfd_link_info *)); |
b34976b6 | 97 | bfd_boolean bfd_elf32_arm_get_bfd_for_interworking |
917583ad | 98 | PARAMS ((bfd *, struct bfd_link_info *)); |
b34976b6 | 99 | bfd_boolean bfd_elf32_arm_process_before_allocation |
917583ad | 100 | PARAMS ((bfd *, struct bfd_link_info *, int)); |
7e392df6 NC |
101 | #endif |
102 | ||
99e4ae17 | 103 | |
fd2ec330 | 104 | #define INTERWORK_FLAG(abfd) (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK) |
9b485d32 | 105 | |
252b5132 RH |
106 | /* The linker script knows the section names for placement. |
107 | The entry_names are used to do simple name mangling on the stubs. | |
108 | Given a function name, and its type, the stub can be found. The | |
9b485d32 | 109 | name can be changed. The only requirement is the %s be present. */ |
252b5132 RH |
110 | #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t" |
111 | #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb" | |
112 | ||
113 | #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7" | |
114 | #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm" | |
115 | ||
116 | /* The name of the dynamic interpreter. This is put in the .interp | |
117 | section. */ | |
118 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" | |
119 | ||
120 | /* The size in bytes of an entry in the procedure linkage table. */ | |
24a1ba0f | 121 | #define PLT_ENTRY_SIZE 16 |
252b5132 RH |
122 | |
123 | /* The first entry in a procedure linkage table looks like | |
124 | this. It is set up so that any shared library function that is | |
59f2c4e7 | 125 | called before the relocation has been set up calls the dynamic |
9b485d32 | 126 | linker first. */ |
24a1ba0f | 127 | static const bfd_vma elf32_arm_plt0_entry [PLT_ENTRY_SIZE / 4] = |
917583ad NC |
128 | { |
129 | 0xe52de004, /* str lr, [sp, #-4]! */ | |
130 | 0xe59fe010, /* ldr lr, [pc, #16] */ | |
131 | 0xe08fe00e, /* add lr, pc, lr */ | |
132 | 0xe5bef008 /* ldr pc, [lr, #8]! */ | |
133 | }; | |
252b5132 RH |
134 | |
135 | /* Subsequent entries in a procedure linkage table look like | |
136 | this. */ | |
24a1ba0f | 137 | static const bfd_vma elf32_arm_plt_entry [PLT_ENTRY_SIZE / 4] = |
99e4ae17 | 138 | { |
917583ad NC |
139 | 0xe59fc004, /* ldr ip, [pc, #4] */ |
140 | 0xe08fc00c, /* add ip, pc, ip */ | |
141 | 0xe59cf000, /* ldr pc, [ip] */ | |
142 | 0x00000000 /* offset to symbol in got */ | |
143 | }; | |
252b5132 | 144 | |
252b5132 RH |
145 | /* The ARM linker needs to keep track of the number of relocs that it |
146 | decides to copy in check_relocs for each symbol. This is so that | |
147 | it can discard PC relative relocs if it doesn't need them when | |
148 | linking with -Bsymbolic. We store the information in a field | |
149 | extending the regular ELF linker hash table. */ | |
150 | ||
151 | /* This structure keeps track of the number of PC relative relocs we | |
152 | have copied for a given symbol. */ | |
252b5132 | 153 | struct elf32_arm_pcrel_relocs_copied |
917583ad NC |
154 | { |
155 | /* Next section. */ | |
156 | struct elf32_arm_pcrel_relocs_copied * next; | |
157 | /* A section in dynobj. */ | |
158 | asection * section; | |
159 | /* Number of relocs copied in this section. */ | |
160 | bfd_size_type count; | |
161 | }; | |
252b5132 | 162 | |
ba96a88f | 163 | /* Arm ELF linker hash entry. */ |
252b5132 | 164 | struct elf32_arm_link_hash_entry |
917583ad NC |
165 | { |
166 | struct elf_link_hash_entry root; | |
252b5132 | 167 | |
917583ad NC |
168 | /* Number of PC relative relocs copied for this symbol. */ |
169 | struct elf32_arm_pcrel_relocs_copied * pcrel_relocs_copied; | |
170 | }; | |
252b5132 RH |
171 | |
172 | /* Declare this now that the above structures are defined. */ | |
b34976b6 | 173 | static bfd_boolean elf32_arm_discard_copies |
252b5132 RH |
174 | PARAMS ((struct elf32_arm_link_hash_entry *, PTR)); |
175 | ||
176 | /* Traverse an arm ELF linker hash table. */ | |
252b5132 RH |
177 | #define elf32_arm_link_hash_traverse(table, func, info) \ |
178 | (elf_link_hash_traverse \ | |
179 | (&(table)->root, \ | |
b34976b6 | 180 | (bfd_boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \ |
252b5132 RH |
181 | (info))) |
182 | ||
183 | /* Get the ARM elf linker hash table from a link_info structure. */ | |
184 | #define elf32_arm_hash_table(info) \ | |
185 | ((struct elf32_arm_link_hash_table *) ((info)->hash)) | |
186 | ||
9b485d32 | 187 | /* ARM ELF linker hash table. */ |
252b5132 | 188 | struct elf32_arm_link_hash_table |
917583ad NC |
189 | { |
190 | /* The main hash table. */ | |
191 | struct elf_link_hash_table root; | |
252b5132 | 192 | |
917583ad | 193 | /* The size in bytes of the section containg the Thumb-to-ARM glue. */ |
dc810e39 | 194 | bfd_size_type thumb_glue_size; |
252b5132 | 195 | |
917583ad | 196 | /* The size in bytes of the section containg the ARM-to-Thumb glue. */ |
dc810e39 | 197 | bfd_size_type arm_glue_size; |
252b5132 | 198 | |
917583ad NC |
199 | /* An arbitary input BFD chosen to hold the glue sections. */ |
200 | bfd * bfd_of_glue_owner; | |
ba96a88f | 201 | |
917583ad NC |
202 | /* A boolean indicating whether knowledge of the ARM's pipeline |
203 | length should be applied by the linker. */ | |
204 | int no_pipeline_knowledge; | |
205 | }; | |
252b5132 | 206 | |
780a67af NC |
207 | /* Create an entry in an ARM ELF linker hash table. */ |
208 | ||
209 | static struct bfd_hash_entry * | |
210 | elf32_arm_link_hash_newfunc (entry, table, string) | |
211 | struct bfd_hash_entry * entry; | |
212 | struct bfd_hash_table * table; | |
213 | const char * string; | |
214 | { | |
215 | struct elf32_arm_link_hash_entry * ret = | |
216 | (struct elf32_arm_link_hash_entry *) entry; | |
217 | ||
218 | /* Allocate the structure if it has not already been allocated by a | |
219 | subclass. */ | |
220 | if (ret == (struct elf32_arm_link_hash_entry *) NULL) | |
221 | ret = ((struct elf32_arm_link_hash_entry *) | |
222 | bfd_hash_allocate (table, | |
223 | sizeof (struct elf32_arm_link_hash_entry))); | |
224 | if (ret == (struct elf32_arm_link_hash_entry *) NULL) | |
225 | return (struct bfd_hash_entry *) ret; | |
226 | ||
227 | /* Call the allocation method of the superclass. */ | |
228 | ret = ((struct elf32_arm_link_hash_entry *) | |
229 | _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, | |
230 | table, string)); | |
231 | if (ret != (struct elf32_arm_link_hash_entry *) NULL) | |
24a1ba0f | 232 | ret->pcrel_relocs_copied = NULL; |
780a67af NC |
233 | |
234 | return (struct bfd_hash_entry *) ret; | |
235 | } | |
236 | ||
9b485d32 | 237 | /* Create an ARM elf linker hash table. */ |
252b5132 RH |
238 | |
239 | static struct bfd_link_hash_table * | |
240 | elf32_arm_link_hash_table_create (abfd) | |
241 | bfd *abfd; | |
242 | { | |
243 | struct elf32_arm_link_hash_table *ret; | |
dc810e39 | 244 | bfd_size_type amt = sizeof (struct elf32_arm_link_hash_table); |
252b5132 | 245 | |
e2d34d7d | 246 | ret = (struct elf32_arm_link_hash_table *) bfd_malloc (amt); |
252b5132 RH |
247 | if (ret == (struct elf32_arm_link_hash_table *) NULL) |
248 | return NULL; | |
249 | ||
250 | if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, | |
780a67af | 251 | elf32_arm_link_hash_newfunc)) |
252b5132 | 252 | { |
e2d34d7d | 253 | free (ret); |
252b5132 RH |
254 | return NULL; |
255 | } | |
256 | ||
257 | ret->thumb_glue_size = 0; | |
258 | ret->arm_glue_size = 0; | |
259 | ret->bfd_of_glue_owner = NULL; | |
ba96a88f | 260 | ret->no_pipeline_knowledge = 0; |
252b5132 RH |
261 | |
262 | return &ret->root.root; | |
263 | } | |
264 | ||
9b485d32 NC |
265 | /* Locate the Thumb encoded calling stub for NAME. */ |
266 | ||
252b5132 RH |
267 | static struct elf_link_hash_entry * |
268 | find_thumb_glue (link_info, name, input_bfd) | |
269 | struct bfd_link_info *link_info; | |
917583ad | 270 | const char *name; |
252b5132 RH |
271 | bfd *input_bfd; |
272 | { | |
273 | char *tmp_name; | |
274 | struct elf_link_hash_entry *hash; | |
275 | struct elf32_arm_link_hash_table *hash_table; | |
276 | ||
277 | /* We need a pointer to the armelf specific hash table. */ | |
278 | hash_table = elf32_arm_hash_table (link_info); | |
279 | ||
dc810e39 AM |
280 | tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name) |
281 | + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1); | |
252b5132 RH |
282 | |
283 | BFD_ASSERT (tmp_name); | |
284 | ||
285 | sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name); | |
286 | ||
287 | hash = elf_link_hash_lookup | |
b34976b6 | 288 | (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE); |
252b5132 RH |
289 | |
290 | if (hash == NULL) | |
291 | /* xgettext:c-format */ | |
8f615d07 AM |
292 | (*_bfd_error_handler) (_("%s: unable to find THUMB glue '%s' for `%s'"), |
293 | bfd_archive_filename (input_bfd), tmp_name, name); | |
252b5132 RH |
294 | |
295 | free (tmp_name); | |
296 | ||
297 | return hash; | |
298 | } | |
299 | ||
9b485d32 NC |
300 | /* Locate the ARM encoded calling stub for NAME. */ |
301 | ||
252b5132 RH |
302 | static struct elf_link_hash_entry * |
303 | find_arm_glue (link_info, name, input_bfd) | |
304 | struct bfd_link_info *link_info; | |
917583ad | 305 | const char *name; |
252b5132 RH |
306 | bfd *input_bfd; |
307 | { | |
308 | char *tmp_name; | |
309 | struct elf_link_hash_entry *myh; | |
310 | struct elf32_arm_link_hash_table *hash_table; | |
311 | ||
312 | /* We need a pointer to the elfarm specific hash table. */ | |
313 | hash_table = elf32_arm_hash_table (link_info); | |
314 | ||
dc810e39 AM |
315 | tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name) |
316 | + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1); | |
252b5132 RH |
317 | |
318 | BFD_ASSERT (tmp_name); | |
319 | ||
320 | sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name); | |
321 | ||
322 | myh = elf_link_hash_lookup | |
b34976b6 | 323 | (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE); |
252b5132 RH |
324 | |
325 | if (myh == NULL) | |
326 | /* xgettext:c-format */ | |
8f615d07 AM |
327 | (*_bfd_error_handler) (_("%s: unable to find ARM glue '%s' for `%s'"), |
328 | bfd_archive_filename (input_bfd), tmp_name, name); | |
252b5132 RH |
329 | |
330 | free (tmp_name); | |
331 | ||
332 | return myh; | |
333 | } | |
334 | ||
9b485d32 | 335 | /* ARM->Thumb glue: |
252b5132 RH |
336 | |
337 | .arm | |
338 | __func_from_arm: | |
339 | ldr r12, __func_addr | |
340 | bx r12 | |
341 | __func_addr: | |
9b485d32 | 342 | .word func @ behave as if you saw a ARM_32 reloc. */ |
252b5132 RH |
343 | |
344 | #define ARM2THUMB_GLUE_SIZE 12 | |
345 | static const insn32 a2t1_ldr_insn = 0xe59fc000; | |
346 | static const insn32 a2t2_bx_r12_insn = 0xe12fff1c; | |
347 | static const insn32 a2t3_func_addr_insn = 0x00000001; | |
348 | ||
9b485d32 | 349 | /* Thumb->ARM: Thumb->(non-interworking aware) ARM |
252b5132 RH |
350 | |
351 | .thumb .thumb | |
352 | .align 2 .align 2 | |
353 | __func_from_thumb: __func_from_thumb: | |
354 | bx pc push {r6, lr} | |
355 | nop ldr r6, __func_addr | |
356 | .arm mov lr, pc | |
357 | __func_change_to_arm: bx r6 | |
358 | b func .arm | |
359 | __func_back_to_thumb: | |
360 | ldmia r13! {r6, lr} | |
361 | bx lr | |
362 | __func_addr: | |
9b485d32 | 363 | .word func */ |
252b5132 RH |
364 | |
365 | #define THUMB2ARM_GLUE_SIZE 8 | |
366 | static const insn16 t2a1_bx_pc_insn = 0x4778; | |
367 | static const insn16 t2a2_noop_insn = 0x46c0; | |
368 | static const insn32 t2a3_b_insn = 0xea000000; | |
369 | ||
7e392df6 | 370 | #ifndef ELFARM_NABI_C_INCLUDED |
b34976b6 | 371 | bfd_boolean |
252b5132 RH |
372 | bfd_elf32_arm_allocate_interworking_sections (info) |
373 | struct bfd_link_info * info; | |
374 | { | |
375 | asection * s; | |
376 | bfd_byte * foo; | |
377 | struct elf32_arm_link_hash_table * globals; | |
378 | ||
379 | globals = elf32_arm_hash_table (info); | |
380 | ||
381 | BFD_ASSERT (globals != NULL); | |
382 | ||
383 | if (globals->arm_glue_size != 0) | |
384 | { | |
385 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
386 | ||
dc810e39 AM |
387 | s = bfd_get_section_by_name (globals->bfd_of_glue_owner, |
388 | ARM2THUMB_GLUE_SECTION_NAME); | |
252b5132 RH |
389 | |
390 | BFD_ASSERT (s != NULL); | |
391 | ||
dc810e39 AM |
392 | foo = (bfd_byte *) bfd_alloc (globals->bfd_of_glue_owner, |
393 | globals->arm_glue_size); | |
252b5132 RH |
394 | |
395 | s->_raw_size = s->_cooked_size = globals->arm_glue_size; | |
396 | s->contents = foo; | |
397 | } | |
398 | ||
399 | if (globals->thumb_glue_size != 0) | |
400 | { | |
401 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
402 | ||
403 | s = bfd_get_section_by_name | |
404 | (globals->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME); | |
405 | ||
406 | BFD_ASSERT (s != NULL); | |
407 | ||
dc810e39 AM |
408 | foo = (bfd_byte *) bfd_alloc (globals->bfd_of_glue_owner, |
409 | globals->thumb_glue_size); | |
252b5132 RH |
410 | |
411 | s->_raw_size = s->_cooked_size = globals->thumb_glue_size; | |
412 | s->contents = foo; | |
413 | } | |
414 | ||
b34976b6 | 415 | return TRUE; |
252b5132 RH |
416 | } |
417 | ||
418 | static void | |
419 | record_arm_to_thumb_glue (link_info, h) | |
420 | struct bfd_link_info * link_info; | |
421 | struct elf_link_hash_entry * h; | |
422 | { | |
423 | const char * name = h->root.root.string; | |
63b0f745 | 424 | asection * s; |
252b5132 RH |
425 | char * tmp_name; |
426 | struct elf_link_hash_entry * myh; | |
14a793b2 | 427 | struct bfd_link_hash_entry * bh; |
252b5132 | 428 | struct elf32_arm_link_hash_table * globals; |
dc810e39 | 429 | bfd_vma val; |
252b5132 RH |
430 | |
431 | globals = elf32_arm_hash_table (link_info); | |
432 | ||
433 | BFD_ASSERT (globals != NULL); | |
434 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
435 | ||
436 | s = bfd_get_section_by_name | |
437 | (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME); | |
438 | ||
252b5132 RH |
439 | BFD_ASSERT (s != NULL); |
440 | ||
dc810e39 AM |
441 | tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name) |
442 | + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1); | |
252b5132 RH |
443 | |
444 | BFD_ASSERT (tmp_name); | |
445 | ||
446 | sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name); | |
447 | ||
448 | myh = elf_link_hash_lookup | |
b34976b6 | 449 | (&(globals)->root, tmp_name, FALSE, FALSE, TRUE); |
252b5132 RH |
450 | |
451 | if (myh != NULL) | |
452 | { | |
9b485d32 | 453 | /* We've already seen this guy. */ |
252b5132 | 454 | free (tmp_name); |
9b485d32 | 455 | return; |
252b5132 RH |
456 | } |
457 | ||
458 | /* The only trick here is using hash_table->arm_glue_size as the value. Even | |
459 | though the section isn't allocated yet, this is where we will be putting | |
460 | it. */ | |
14a793b2 | 461 | bh = NULL; |
dc810e39 AM |
462 | val = globals->arm_glue_size + 1; |
463 | _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner, | |
464 | tmp_name, BSF_GLOBAL, s, val, | |
b34976b6 | 465 | NULL, TRUE, FALSE, &bh); |
252b5132 RH |
466 | |
467 | free (tmp_name); | |
468 | ||
469 | globals->arm_glue_size += ARM2THUMB_GLUE_SIZE; | |
470 | ||
471 | return; | |
472 | } | |
473 | ||
474 | static void | |
475 | record_thumb_to_arm_glue (link_info, h) | |
476 | struct bfd_link_info *link_info; | |
477 | struct elf_link_hash_entry *h; | |
478 | { | |
479 | const char *name = h->root.root.string; | |
63b0f745 | 480 | asection *s; |
252b5132 RH |
481 | char *tmp_name; |
482 | struct elf_link_hash_entry *myh; | |
14a793b2 | 483 | struct bfd_link_hash_entry *bh; |
252b5132 RH |
484 | struct elf32_arm_link_hash_table *hash_table; |
485 | char bind; | |
dc810e39 | 486 | bfd_vma val; |
252b5132 RH |
487 | |
488 | hash_table = elf32_arm_hash_table (link_info); | |
489 | ||
490 | BFD_ASSERT (hash_table != NULL); | |
491 | BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL); | |
492 | ||
493 | s = bfd_get_section_by_name | |
494 | (hash_table->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME); | |
495 | ||
496 | BFD_ASSERT (s != NULL); | |
497 | ||
dc810e39 AM |
498 | tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name) |
499 | + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1); | |
252b5132 RH |
500 | |
501 | BFD_ASSERT (tmp_name); | |
502 | ||
503 | sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name); | |
504 | ||
505 | myh = elf_link_hash_lookup | |
b34976b6 | 506 | (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE); |
252b5132 RH |
507 | |
508 | if (myh != NULL) | |
509 | { | |
9b485d32 | 510 | /* We've already seen this guy. */ |
252b5132 | 511 | free (tmp_name); |
9b485d32 | 512 | return; |
252b5132 RH |
513 | } |
514 | ||
14a793b2 | 515 | bh = NULL; |
dc810e39 AM |
516 | val = hash_table->thumb_glue_size + 1; |
517 | _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner, | |
518 | tmp_name, BSF_GLOBAL, s, val, | |
b34976b6 | 519 | NULL, TRUE, FALSE, &bh); |
252b5132 | 520 | |
9b485d32 | 521 | /* If we mark it 'Thumb', the disassembler will do a better job. */ |
14a793b2 | 522 | myh = (struct elf_link_hash_entry *) bh; |
252b5132 RH |
523 | bind = ELF_ST_BIND (myh->type); |
524 | myh->type = ELF_ST_INFO (bind, STT_ARM_TFUNC); | |
525 | ||
526 | free (tmp_name); | |
527 | ||
252b5132 RH |
528 | #define CHANGE_TO_ARM "__%s_change_to_arm" |
529 | #define BACK_FROM_ARM "__%s_back_from_arm" | |
530 | ||
9b485d32 | 531 | /* Allocate another symbol to mark where we switch to Arm mode. */ |
dc810e39 AM |
532 | tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name) |
533 | + strlen (CHANGE_TO_ARM) + 1); | |
252b5132 RH |
534 | |
535 | BFD_ASSERT (tmp_name); | |
536 | ||
537 | sprintf (tmp_name, CHANGE_TO_ARM, name); | |
538 | ||
14a793b2 | 539 | bh = NULL; |
dc810e39 AM |
540 | val = hash_table->thumb_glue_size + 4, |
541 | _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner, | |
542 | tmp_name, BSF_LOCAL, s, val, | |
b34976b6 | 543 | NULL, TRUE, FALSE, &bh); |
252b5132 RH |
544 | |
545 | free (tmp_name); | |
546 | ||
547 | hash_table->thumb_glue_size += THUMB2ARM_GLUE_SIZE; | |
548 | ||
549 | return; | |
550 | } | |
551 | ||
8afb0e02 NC |
552 | /* Add the glue sections to ABFD. This function is called from the |
553 | linker scripts in ld/emultempl/{armelf}.em. */ | |
9b485d32 | 554 | |
b34976b6 | 555 | bfd_boolean |
8afb0e02 | 556 | bfd_elf32_arm_add_glue_sections_to_bfd (abfd, info) |
252b5132 RH |
557 | bfd *abfd; |
558 | struct bfd_link_info *info; | |
559 | { | |
252b5132 RH |
560 | flagword flags; |
561 | asection *sec; | |
562 | ||
8afb0e02 NC |
563 | /* If we are only performing a partial |
564 | link do not bother adding the glue. */ | |
252b5132 | 565 | if (info->relocateable) |
b34976b6 | 566 | return TRUE; |
252b5132 | 567 | |
252b5132 RH |
568 | sec = bfd_get_section_by_name (abfd, ARM2THUMB_GLUE_SECTION_NAME); |
569 | ||
570 | if (sec == NULL) | |
571 | { | |
57db232e NC |
572 | /* Note: we do not include the flag SEC_LINKER_CREATED, as this |
573 | will prevent elf_link_input_bfd() from processing the contents | |
574 | of this section. */ | |
811b4bf6 | 575 | flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY; |
252b5132 RH |
576 | |
577 | sec = bfd_make_section (abfd, ARM2THUMB_GLUE_SECTION_NAME); | |
578 | ||
579 | if (sec == NULL | |
580 | || !bfd_set_section_flags (abfd, sec, flags) | |
581 | || !bfd_set_section_alignment (abfd, sec, 2)) | |
b34976b6 | 582 | return FALSE; |
9a5aca8c | 583 | |
57db232e NC |
584 | /* Set the gc mark to prevent the section from being removed by garbage |
585 | collection, despite the fact that no relocs refer to this section. */ | |
586 | sec->gc_mark = 1; | |
252b5132 RH |
587 | } |
588 | ||
589 | sec = bfd_get_section_by_name (abfd, THUMB2ARM_GLUE_SECTION_NAME); | |
590 | ||
591 | if (sec == NULL) | |
592 | { | |
811b4bf6 | 593 | flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY; |
252b5132 RH |
594 | |
595 | sec = bfd_make_section (abfd, THUMB2ARM_GLUE_SECTION_NAME); | |
596 | ||
597 | if (sec == NULL | |
598 | || !bfd_set_section_flags (abfd, sec, flags) | |
599 | || !bfd_set_section_alignment (abfd, sec, 2)) | |
b34976b6 | 600 | return FALSE; |
9a5aca8c | 601 | |
57db232e | 602 | sec->gc_mark = 1; |
252b5132 RH |
603 | } |
604 | ||
b34976b6 | 605 | return TRUE; |
8afb0e02 NC |
606 | } |
607 | ||
608 | /* Select a BFD to be used to hold the sections used by the glue code. | |
609 | This function is called from the linker scripts in ld/emultempl/ | |
610 | {armelf/pe}.em */ | |
611 | ||
b34976b6 | 612 | bfd_boolean |
8afb0e02 NC |
613 | bfd_elf32_arm_get_bfd_for_interworking (abfd, info) |
614 | bfd *abfd; | |
615 | struct bfd_link_info *info; | |
616 | { | |
617 | struct elf32_arm_link_hash_table *globals; | |
618 | ||
619 | /* If we are only performing a partial link | |
620 | do not bother getting a bfd to hold the glue. */ | |
621 | if (info->relocateable) | |
b34976b6 | 622 | return TRUE; |
8afb0e02 NC |
623 | |
624 | globals = elf32_arm_hash_table (info); | |
625 | ||
626 | BFD_ASSERT (globals != NULL); | |
627 | ||
628 | if (globals->bfd_of_glue_owner != NULL) | |
b34976b6 | 629 | return TRUE; |
8afb0e02 | 630 | |
252b5132 RH |
631 | /* Save the bfd for later use. */ |
632 | globals->bfd_of_glue_owner = abfd; | |
cedb70c5 | 633 | |
b34976b6 | 634 | return TRUE; |
252b5132 RH |
635 | } |
636 | ||
b34976b6 | 637 | bfd_boolean |
ba96a88f | 638 | bfd_elf32_arm_process_before_allocation (abfd, link_info, no_pipeline_knowledge) |
252b5132 RH |
639 | bfd *abfd; |
640 | struct bfd_link_info *link_info; | |
ba96a88f | 641 | int no_pipeline_knowledge; |
252b5132 RH |
642 | { |
643 | Elf_Internal_Shdr *symtab_hdr; | |
6cdc0ccc | 644 | Elf_Internal_Rela *internal_relocs = NULL; |
252b5132 RH |
645 | Elf_Internal_Rela *irel, *irelend; |
646 | bfd_byte *contents = NULL; | |
252b5132 RH |
647 | |
648 | asection *sec; | |
649 | struct elf32_arm_link_hash_table *globals; | |
650 | ||
651 | /* If we are only performing a partial link do not bother | |
652 | to construct any glue. */ | |
653 | if (link_info->relocateable) | |
b34976b6 | 654 | return TRUE; |
252b5132 RH |
655 | |
656 | /* Here we have a bfd that is to be included on the link. We have a hook | |
657 | to do reloc rummaging, before section sizes are nailed down. */ | |
252b5132 RH |
658 | globals = elf32_arm_hash_table (link_info); |
659 | ||
660 | BFD_ASSERT (globals != NULL); | |
661 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
662 | ||
ba96a88f | 663 | globals->no_pipeline_knowledge = no_pipeline_knowledge; |
f21f3fe0 | 664 | |
252b5132 RH |
665 | /* Rummage around all the relocs and map the glue vectors. */ |
666 | sec = abfd->sections; | |
667 | ||
668 | if (sec == NULL) | |
b34976b6 | 669 | return TRUE; |
252b5132 RH |
670 | |
671 | for (; sec != NULL; sec = sec->next) | |
672 | { | |
673 | if (sec->reloc_count == 0) | |
674 | continue; | |
675 | ||
676 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
252b5132 | 677 | |
9b485d32 | 678 | /* Load the relocs. */ |
6cdc0ccc AM |
679 | internal_relocs |
680 | = _bfd_elf32_link_read_relocs (abfd, sec, (PTR) NULL, | |
b34976b6 | 681 | (Elf_Internal_Rela *) NULL, FALSE); |
252b5132 | 682 | |
6cdc0ccc AM |
683 | if (internal_relocs == NULL) |
684 | goto error_return; | |
252b5132 | 685 | |
6cdc0ccc AM |
686 | irelend = internal_relocs + sec->reloc_count; |
687 | for (irel = internal_relocs; irel < irelend; irel++) | |
252b5132 RH |
688 | { |
689 | long r_type; | |
690 | unsigned long r_index; | |
252b5132 RH |
691 | |
692 | struct elf_link_hash_entry *h; | |
693 | ||
694 | r_type = ELF32_R_TYPE (irel->r_info); | |
695 | r_index = ELF32_R_SYM (irel->r_info); | |
696 | ||
9b485d32 | 697 | /* These are the only relocation types we care about. */ |
ba96a88f | 698 | if ( r_type != R_ARM_PC24 |
252b5132 RH |
699 | && r_type != R_ARM_THM_PC22) |
700 | continue; | |
701 | ||
702 | /* Get the section contents if we haven't done so already. */ | |
703 | if (contents == NULL) | |
704 | { | |
705 | /* Get cached copy if it exists. */ | |
706 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
707 | contents = elf_section_data (sec)->this_hdr.contents; | |
708 | else | |
709 | { | |
710 | /* Go get them off disk. */ | |
711 | contents = (bfd_byte *) bfd_malloc (sec->_raw_size); | |
712 | if (contents == NULL) | |
713 | goto error_return; | |
9b485d32 | 714 | |
252b5132 | 715 | if (!bfd_get_section_contents (abfd, sec, contents, |
dc810e39 | 716 | (file_ptr) 0, sec->_raw_size)) |
252b5132 RH |
717 | goto error_return; |
718 | } | |
719 | } | |
720 | ||
a7c10850 | 721 | /* If the relocation is not against a symbol it cannot concern us. */ |
252b5132 RH |
722 | h = NULL; |
723 | ||
9b485d32 | 724 | /* We don't care about local symbols. */ |
252b5132 RH |
725 | if (r_index < symtab_hdr->sh_info) |
726 | continue; | |
727 | ||
9b485d32 | 728 | /* This is an external symbol. */ |
252b5132 RH |
729 | r_index -= symtab_hdr->sh_info; |
730 | h = (struct elf_link_hash_entry *) | |
731 | elf_sym_hashes (abfd)[r_index]; | |
732 | ||
733 | /* If the relocation is against a static symbol it must be within | |
734 | the current section and so cannot be a cross ARM/Thumb relocation. */ | |
735 | if (h == NULL) | |
736 | continue; | |
737 | ||
738 | switch (r_type) | |
739 | { | |
740 | case R_ARM_PC24: | |
741 | /* This one is a call from arm code. We need to look up | |
2f0ca46a | 742 | the target of the call. If it is a thumb target, we |
252b5132 | 743 | insert glue. */ |
252b5132 RH |
744 | if (ELF_ST_TYPE(h->type) == STT_ARM_TFUNC) |
745 | record_arm_to_thumb_glue (link_info, h); | |
746 | break; | |
747 | ||
748 | case R_ARM_THM_PC22: | |
f21f3fe0 | 749 | /* This one is a call from thumb code. We look |
2f0ca46a | 750 | up the target of the call. If it is not a thumb |
bcbdc74c | 751 | target, we insert glue. */ |
252b5132 RH |
752 | if (ELF_ST_TYPE (h->type) != STT_ARM_TFUNC) |
753 | record_thumb_to_arm_glue (link_info, h); | |
754 | break; | |
755 | ||
756 | default: | |
757 | break; | |
758 | } | |
759 | } | |
6cdc0ccc AM |
760 | |
761 | if (contents != NULL | |
762 | && elf_section_data (sec)->this_hdr.contents != contents) | |
763 | free (contents); | |
764 | contents = NULL; | |
765 | ||
766 | if (internal_relocs != NULL | |
767 | && elf_section_data (sec)->relocs != internal_relocs) | |
768 | free (internal_relocs); | |
769 | internal_relocs = NULL; | |
252b5132 RH |
770 | } |
771 | ||
b34976b6 | 772 | return TRUE; |
9a5aca8c | 773 | |
252b5132 | 774 | error_return: |
6cdc0ccc AM |
775 | if (contents != NULL |
776 | && elf_section_data (sec)->this_hdr.contents != contents) | |
777 | free (contents); | |
778 | if (internal_relocs != NULL | |
779 | && elf_section_data (sec)->relocs != internal_relocs) | |
780 | free (internal_relocs); | |
9a5aca8c | 781 | |
b34976b6 | 782 | return FALSE; |
252b5132 | 783 | } |
7e392df6 | 784 | #endif |
252b5132 RH |
785 | |
786 | /* The thumb form of a long branch is a bit finicky, because the offset | |
787 | encoding is split over two fields, each in it's own instruction. They | |
f21f3fe0 | 788 | can occur in any order. So given a thumb form of long branch, and an |
252b5132 | 789 | offset, insert the offset into the thumb branch and return finished |
f21f3fe0 | 790 | instruction. |
252b5132 | 791 | |
f21f3fe0 | 792 | It takes two thumb instructions to encode the target address. Each has |
252b5132 | 793 | 11 bits to invest. The upper 11 bits are stored in one (identifed by |
f21f3fe0 UD |
794 | H-0.. see below), the lower 11 bits are stored in the other (identified |
795 | by H-1). | |
252b5132 | 796 | |
f21f3fe0 | 797 | Combine together and shifted left by 1 (it's a half word address) and |
252b5132 RH |
798 | there you have it. |
799 | ||
800 | Op: 1111 = F, | |
801 | H-0, upper address-0 = 000 | |
802 | Op: 1111 = F, | |
803 | H-1, lower address-0 = 800 | |
804 | ||
f21f3fe0 | 805 | They can be ordered either way, but the arm tools I've seen always put |
252b5132 RH |
806 | the lower one first. It probably doesn't matter. krk@cygnus.com |
807 | ||
808 | XXX: Actually the order does matter. The second instruction (H-1) | |
809 | moves the computed address into the PC, so it must be the second one | |
810 | in the sequence. The problem, however is that whilst little endian code | |
811 | stores the instructions in HI then LOW order, big endian code does the | |
dfc5f959 | 812 | reverse. nickc@cygnus.com. */ |
252b5132 | 813 | |
dfc5f959 NC |
814 | #define LOW_HI_ORDER 0xF800F000 |
815 | #define HI_LOW_ORDER 0xF000F800 | |
252b5132 RH |
816 | |
817 | static insn32 | |
818 | insert_thumb_branch (br_insn, rel_off) | |
819 | insn32 br_insn; | |
820 | int rel_off; | |
821 | { | |
822 | unsigned int low_bits; | |
823 | unsigned int high_bits; | |
824 | ||
252b5132 RH |
825 | BFD_ASSERT ((rel_off & 1) != 1); |
826 | ||
dfc5f959 NC |
827 | rel_off >>= 1; /* Half word aligned address. */ |
828 | low_bits = rel_off & 0x000007FF; /* The bottom 11 bits. */ | |
829 | high_bits = (rel_off >> 11) & 0x000007FF; /* The top 11 bits. */ | |
252b5132 RH |
830 | |
831 | if ((br_insn & LOW_HI_ORDER) == LOW_HI_ORDER) | |
832 | br_insn = LOW_HI_ORDER | (low_bits << 16) | high_bits; | |
833 | else if ((br_insn & HI_LOW_ORDER) == HI_LOW_ORDER) | |
834 | br_insn = HI_LOW_ORDER | (high_bits << 16) | low_bits; | |
835 | else | |
9b485d32 NC |
836 | /* FIXME: abort is probably not the right call. krk@cygnus.com */ |
837 | abort (); /* error - not a valid branch instruction form. */ | |
252b5132 | 838 | |
252b5132 RH |
839 | return br_insn; |
840 | } | |
841 | ||
9b485d32 NC |
842 | /* Thumb code calling an ARM function. */ |
843 | ||
252b5132 RH |
844 | static int |
845 | elf32_thumb_to_arm_stub (info, name, input_bfd, output_bfd, input_section, | |
846 | hit_data, sym_sec, offset, addend, val) | |
bcbdc74c NC |
847 | struct bfd_link_info * info; |
848 | const char * name; | |
849 | bfd * input_bfd; | |
850 | bfd * output_bfd; | |
851 | asection * input_section; | |
852 | bfd_byte * hit_data; | |
853 | asection * sym_sec; | |
854 | bfd_vma offset; | |
855 | bfd_signed_vma addend; | |
856 | bfd_vma val; | |
252b5132 | 857 | { |
bcbdc74c | 858 | asection * s = 0; |
dc810e39 | 859 | bfd_vma my_offset; |
252b5132 RH |
860 | unsigned long int tmp; |
861 | long int ret_offset; | |
bcbdc74c NC |
862 | struct elf_link_hash_entry * myh; |
863 | struct elf32_arm_link_hash_table * globals; | |
252b5132 RH |
864 | |
865 | myh = find_thumb_glue (info, name, input_bfd); | |
866 | if (myh == NULL) | |
b34976b6 | 867 | return FALSE; |
252b5132 RH |
868 | |
869 | globals = elf32_arm_hash_table (info); | |
870 | ||
871 | BFD_ASSERT (globals != NULL); | |
872 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
873 | ||
874 | my_offset = myh->root.u.def.value; | |
875 | ||
876 | s = bfd_get_section_by_name (globals->bfd_of_glue_owner, | |
877 | THUMB2ARM_GLUE_SECTION_NAME); | |
878 | ||
879 | BFD_ASSERT (s != NULL); | |
880 | BFD_ASSERT (s->contents != NULL); | |
881 | BFD_ASSERT (s->output_section != NULL); | |
882 | ||
883 | if ((my_offset & 0x01) == 0x01) | |
884 | { | |
885 | if (sym_sec != NULL | |
886 | && sym_sec->owner != NULL | |
887 | && !INTERWORK_FLAG (sym_sec->owner)) | |
888 | { | |
8f615d07 | 889 | (*_bfd_error_handler) |
9b485d32 | 890 | (_("%s(%s): warning: interworking not enabled."), |
8f615d07 AM |
891 | bfd_archive_filename (sym_sec->owner), name); |
892 | (*_bfd_error_handler) | |
9b485d32 | 893 | (_(" first occurrence: %s: thumb call to arm"), |
8f615d07 | 894 | bfd_archive_filename (input_bfd)); |
252b5132 | 895 | |
b34976b6 | 896 | return FALSE; |
252b5132 RH |
897 | } |
898 | ||
899 | --my_offset; | |
900 | myh->root.u.def.value = my_offset; | |
901 | ||
dc810e39 | 902 | bfd_put_16 (output_bfd, (bfd_vma) t2a1_bx_pc_insn, |
252b5132 RH |
903 | s->contents + my_offset); |
904 | ||
dc810e39 | 905 | bfd_put_16 (output_bfd, (bfd_vma) t2a2_noop_insn, |
252b5132 RH |
906 | s->contents + my_offset + 2); |
907 | ||
908 | ret_offset = | |
9b485d32 NC |
909 | /* Address of destination of the stub. */ |
910 | ((bfd_signed_vma) val) | |
252b5132 | 911 | - ((bfd_signed_vma) |
9b485d32 NC |
912 | /* Offset from the start of the current section to the start of the stubs. */ |
913 | (s->output_offset | |
914 | /* Offset of the start of this stub from the start of the stubs. */ | |
915 | + my_offset | |
916 | /* Address of the start of the current section. */ | |
917 | + s->output_section->vma) | |
918 | /* The branch instruction is 4 bytes into the stub. */ | |
919 | + 4 | |
920 | /* ARM branches work from the pc of the instruction + 8. */ | |
921 | + 8); | |
252b5132 RH |
922 | |
923 | bfd_put_32 (output_bfd, | |
dc810e39 | 924 | (bfd_vma) t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF), |
252b5132 RH |
925 | s->contents + my_offset + 4); |
926 | } | |
927 | ||
928 | BFD_ASSERT (my_offset <= globals->thumb_glue_size); | |
929 | ||
930 | /* Now go back and fix up the original BL insn to point | |
931 | to here. */ | |
dc810e39 AM |
932 | ret_offset = (s->output_offset |
933 | + my_offset | |
934 | - (input_section->output_offset | |
935 | + offset + addend) | |
936 | - 8); | |
252b5132 RH |
937 | |
938 | tmp = bfd_get_32 (input_bfd, hit_data | |
939 | - input_section->vma); | |
940 | ||
941 | bfd_put_32 (output_bfd, | |
dc810e39 | 942 | (bfd_vma) insert_thumb_branch (tmp, ret_offset), |
252b5132 RH |
943 | hit_data - input_section->vma); |
944 | ||
b34976b6 | 945 | return TRUE; |
252b5132 RH |
946 | } |
947 | ||
9b485d32 NC |
948 | /* Arm code calling a Thumb function. */ |
949 | ||
252b5132 RH |
950 | static int |
951 | elf32_arm_to_thumb_stub (info, name, input_bfd, output_bfd, input_section, | |
952 | hit_data, sym_sec, offset, addend, val) | |
bcbdc74c NC |
953 | struct bfd_link_info * info; |
954 | const char * name; | |
955 | bfd * input_bfd; | |
956 | bfd * output_bfd; | |
957 | asection * input_section; | |
958 | bfd_byte * hit_data; | |
959 | asection * sym_sec; | |
960 | bfd_vma offset; | |
961 | bfd_signed_vma addend; | |
962 | bfd_vma val; | |
252b5132 RH |
963 | { |
964 | unsigned long int tmp; | |
dc810e39 | 965 | bfd_vma my_offset; |
bcbdc74c | 966 | asection * s; |
252b5132 | 967 | long int ret_offset; |
bcbdc74c NC |
968 | struct elf_link_hash_entry * myh; |
969 | struct elf32_arm_link_hash_table * globals; | |
252b5132 RH |
970 | |
971 | myh = find_arm_glue (info, name, input_bfd); | |
972 | if (myh == NULL) | |
b34976b6 | 973 | return FALSE; |
252b5132 RH |
974 | |
975 | globals = elf32_arm_hash_table (info); | |
976 | ||
977 | BFD_ASSERT (globals != NULL); | |
978 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
979 | ||
980 | my_offset = myh->root.u.def.value; | |
981 | s = bfd_get_section_by_name (globals->bfd_of_glue_owner, | |
982 | ARM2THUMB_GLUE_SECTION_NAME); | |
983 | BFD_ASSERT (s != NULL); | |
984 | BFD_ASSERT (s->contents != NULL); | |
985 | BFD_ASSERT (s->output_section != NULL); | |
986 | ||
987 | if ((my_offset & 0x01) == 0x01) | |
988 | { | |
989 | if (sym_sec != NULL | |
990 | && sym_sec->owner != NULL | |
991 | && !INTERWORK_FLAG (sym_sec->owner)) | |
992 | { | |
8f615d07 | 993 | (*_bfd_error_handler) |
9b485d32 | 994 | (_("%s(%s): warning: interworking not enabled."), |
8f615d07 AM |
995 | bfd_archive_filename (sym_sec->owner), name); |
996 | (*_bfd_error_handler) | |
9b485d32 | 997 | (_(" first occurrence: %s: arm call to thumb"), |
8f615d07 | 998 | bfd_archive_filename (input_bfd)); |
252b5132 | 999 | } |
9b485d32 | 1000 | |
252b5132 RH |
1001 | --my_offset; |
1002 | myh->root.u.def.value = my_offset; | |
1003 | ||
dc810e39 | 1004 | bfd_put_32 (output_bfd, (bfd_vma) a2t1_ldr_insn, |
252b5132 RH |
1005 | s->contents + my_offset); |
1006 | ||
dc810e39 | 1007 | bfd_put_32 (output_bfd, (bfd_vma) a2t2_bx_r12_insn, |
252b5132 RH |
1008 | s->contents + my_offset + 4); |
1009 | ||
1010 | /* It's a thumb address. Add the low order bit. */ | |
1011 | bfd_put_32 (output_bfd, val | a2t3_func_addr_insn, | |
1012 | s->contents + my_offset + 8); | |
1013 | } | |
1014 | ||
1015 | BFD_ASSERT (my_offset <= globals->arm_glue_size); | |
1016 | ||
1017 | tmp = bfd_get_32 (input_bfd, hit_data); | |
1018 | tmp = tmp & 0xFF000000; | |
1019 | ||
9b485d32 | 1020 | /* Somehow these are both 4 too far, so subtract 8. */ |
dc810e39 AM |
1021 | ret_offset = (s->output_offset |
1022 | + my_offset | |
1023 | + s->output_section->vma | |
1024 | - (input_section->output_offset | |
1025 | + input_section->output_section->vma | |
1026 | + offset + addend) | |
1027 | - 8); | |
9a5aca8c | 1028 | |
252b5132 RH |
1029 | tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF); |
1030 | ||
dc810e39 | 1031 | bfd_put_32 (output_bfd, (bfd_vma) tmp, hit_data - input_section->vma); |
252b5132 | 1032 | |
b34976b6 | 1033 | return TRUE; |
252b5132 RH |
1034 | } |
1035 | ||
1036 | /* Perform a relocation as part of a final link. */ | |
9b485d32 | 1037 | |
252b5132 RH |
1038 | static bfd_reloc_status_type |
1039 | elf32_arm_final_link_relocate (howto, input_bfd, output_bfd, | |
1040 | input_section, contents, rel, value, | |
780a67af | 1041 | info, sym_sec, sym_name, sym_flags, h) |
252b5132 RH |
1042 | reloc_howto_type * howto; |
1043 | bfd * input_bfd; | |
1044 | bfd * output_bfd; | |
1045 | asection * input_section; | |
1046 | bfd_byte * contents; | |
1047 | Elf_Internal_Rela * rel; | |
1048 | bfd_vma value; | |
1049 | struct bfd_link_info * info; | |
1050 | asection * sym_sec; | |
1051 | const char * sym_name; | |
dc810e39 | 1052 | int sym_flags; |
780a67af | 1053 | struct elf_link_hash_entry * h; |
252b5132 RH |
1054 | { |
1055 | unsigned long r_type = howto->type; | |
1056 | unsigned long r_symndx; | |
1057 | bfd_byte * hit_data = contents + rel->r_offset; | |
1058 | bfd * dynobj = NULL; | |
1059 | Elf_Internal_Shdr * symtab_hdr; | |
1060 | struct elf_link_hash_entry ** sym_hashes; | |
1061 | bfd_vma * local_got_offsets; | |
1062 | asection * sgot = NULL; | |
1063 | asection * splt = NULL; | |
1064 | asection * sreloc = NULL; | |
252b5132 | 1065 | bfd_vma addend; |
ba96a88f NC |
1066 | bfd_signed_vma signed_addend; |
1067 | struct elf32_arm_link_hash_table * globals; | |
f21f3fe0 | 1068 | |
cac15327 NC |
1069 | /* If the start address has been set, then set the EF_ARM_HASENTRY |
1070 | flag. Setting this more than once is redundant, but the cost is | |
1071 | not too high, and it keeps the code simple. | |
99e4ae17 | 1072 | |
cac15327 NC |
1073 | The test is done here, rather than somewhere else, because the |
1074 | start address is only set just before the final link commences. | |
1075 | ||
1076 | Note - if the user deliberately sets a start address of 0, the | |
1077 | flag will not be set. */ | |
1078 | if (bfd_get_start_address (output_bfd) != 0) | |
1079 | elf_elfheader (output_bfd)->e_flags |= EF_ARM_HASENTRY; | |
99e4ae17 | 1080 | |
ba96a88f | 1081 | globals = elf32_arm_hash_table (info); |
f21f3fe0 | 1082 | |
252b5132 RH |
1083 | dynobj = elf_hash_table (info)->dynobj; |
1084 | if (dynobj) | |
1085 | { | |
1086 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
1087 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
1088 | } | |
1089 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; | |
1090 | sym_hashes = elf_sym_hashes (input_bfd); | |
1091 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
1092 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1093 | ||
acf8aed4 | 1094 | #if USE_REL |
ba96a88f NC |
1095 | addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask; |
1096 | ||
1097 | if (addend & ((howto->src_mask + 1) >> 1)) | |
1098 | { | |
1099 | signed_addend = -1; | |
1100 | signed_addend &= ~ howto->src_mask; | |
1101 | signed_addend |= addend; | |
1102 | } | |
1103 | else | |
1104 | signed_addend = addend; | |
252b5132 | 1105 | #else |
ba96a88f | 1106 | addend = signed_addend = rel->r_addend; |
252b5132 | 1107 | #endif |
f21f3fe0 | 1108 | |
252b5132 RH |
1109 | switch (r_type) |
1110 | { | |
1111 | case R_ARM_NONE: | |
1112 | return bfd_reloc_ok; | |
1113 | ||
1114 | case R_ARM_PC24: | |
1115 | case R_ARM_ABS32: | |
1116 | case R_ARM_REL32: | |
dfc5f959 NC |
1117 | #ifndef OLD_ARM_ABI |
1118 | case R_ARM_XPC25: | |
1119 | #endif | |
252b5132 | 1120 | /* When generating a shared object, these relocations are copied |
9b485d32 | 1121 | into the output file to be resolved at run time. */ |
252b5132 | 1122 | if (info->shared |
ec338859 | 1123 | && r_symndx != 0 |
252b5132 | 1124 | && (r_type != R_ARM_PC24 |
99e4ae17 | 1125 | || (h != NULL |
252b5132 RH |
1126 | && h->dynindx != -1 |
1127 | && (! info->symbolic | |
1128 | || (h->elf_link_hash_flags | |
1129 | & ELF_LINK_HASH_DEF_REGULAR) == 0)))) | |
1130 | { | |
947216bf AM |
1131 | Elf_Internal_Rela outrel; |
1132 | bfd_byte *loc; | |
b34976b6 | 1133 | bfd_boolean skip, relocate; |
f21f3fe0 | 1134 | |
252b5132 RH |
1135 | if (sreloc == NULL) |
1136 | { | |
1137 | const char * name; | |
f21f3fe0 | 1138 | |
252b5132 RH |
1139 | name = (bfd_elf_string_from_elf_section |
1140 | (input_bfd, | |
1141 | elf_elfheader (input_bfd)->e_shstrndx, | |
1142 | elf_section_data (input_section)->rel_hdr.sh_name)); | |
1143 | if (name == NULL) | |
1144 | return bfd_reloc_notsupported; | |
f21f3fe0 | 1145 | |
252b5132 RH |
1146 | BFD_ASSERT (strncmp (name, ".rel", 4) == 0 |
1147 | && strcmp (bfd_get_section_name (input_bfd, | |
1148 | input_section), | |
1149 | name + 4) == 0); | |
f21f3fe0 | 1150 | |
252b5132 RH |
1151 | sreloc = bfd_get_section_by_name (dynobj, name); |
1152 | BFD_ASSERT (sreloc != NULL); | |
1153 | } | |
f21f3fe0 | 1154 | |
b34976b6 AM |
1155 | skip = FALSE; |
1156 | relocate = FALSE; | |
f21f3fe0 | 1157 | |
c629eae0 JJ |
1158 | outrel.r_offset = |
1159 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
1160 | rel->r_offset); | |
1161 | if (outrel.r_offset == (bfd_vma) -1) | |
b34976b6 | 1162 | skip = TRUE; |
0bb2d96a | 1163 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 1164 | skip = TRUE, relocate = TRUE; |
252b5132 RH |
1165 | outrel.r_offset += (input_section->output_section->vma |
1166 | + input_section->output_offset); | |
f21f3fe0 | 1167 | |
252b5132 | 1168 | if (skip) |
0bb2d96a | 1169 | memset (&outrel, 0, sizeof outrel); |
252b5132 RH |
1170 | else if (r_type == R_ARM_PC24) |
1171 | { | |
1172 | BFD_ASSERT (h != NULL && h->dynindx != -1); | |
0bb2d96a | 1173 | if ((input_section->flags & SEC_ALLOC) == 0) |
b34976b6 | 1174 | relocate = TRUE; |
252b5132 RH |
1175 | outrel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_PC24); |
1176 | } | |
1177 | else | |
1178 | { | |
1179 | if (h == NULL | |
1180 | || ((info->symbolic || h->dynindx == -1) | |
1181 | && (h->elf_link_hash_flags | |
1182 | & ELF_LINK_HASH_DEF_REGULAR) != 0)) | |
1183 | { | |
b34976b6 | 1184 | relocate = TRUE; |
252b5132 RH |
1185 | outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE); |
1186 | } | |
1187 | else | |
1188 | { | |
1189 | BFD_ASSERT (h->dynindx != -1); | |
0bb2d96a | 1190 | if ((input_section->flags & SEC_ALLOC) == 0) |
b34976b6 | 1191 | relocate = TRUE; |
252b5132 RH |
1192 | outrel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_ABS32); |
1193 | } | |
1194 | } | |
f21f3fe0 | 1195 | |
947216bf AM |
1196 | loc = sreloc->contents; |
1197 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel); | |
1198 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); | |
9a5aca8c | 1199 | |
f21f3fe0 | 1200 | /* If this reloc is against an external symbol, we do not want to |
252b5132 | 1201 | fiddle with the addend. Otherwise, we need to include the symbol |
9b485d32 | 1202 | value so that it becomes an addend for the dynamic reloc. */ |
252b5132 RH |
1203 | if (! relocate) |
1204 | return bfd_reloc_ok; | |
9a5aca8c | 1205 | |
f21f3fe0 | 1206 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
252b5132 RH |
1207 | contents, rel->r_offset, value, |
1208 | (bfd_vma) 0); | |
1209 | } | |
1210 | else switch (r_type) | |
1211 | { | |
dfc5f959 NC |
1212 | #ifndef OLD_ARM_ABI |
1213 | case R_ARM_XPC25: /* Arm BLX instruction. */ | |
1214 | #endif | |
1215 | case R_ARM_PC24: /* Arm B/BL instruction */ | |
1216 | #ifndef OLD_ARM_ABI | |
1217 | if (r_type == R_ARM_XPC25) | |
252b5132 | 1218 | { |
dfc5f959 NC |
1219 | /* Check for Arm calling Arm function. */ |
1220 | /* FIXME: Should we translate the instruction into a BL | |
1221 | instruction instead ? */ | |
1222 | if (sym_flags != STT_ARM_TFUNC) | |
8f615d07 | 1223 | (*_bfd_error_handler) (_("\ |
dfc5f959 | 1224 | %s: Warning: Arm BLX instruction targets Arm function '%s'."), |
8f615d07 AM |
1225 | bfd_archive_filename (input_bfd), |
1226 | h ? h->root.root.string : "(local)"); | |
dfc5f959 NC |
1227 | } |
1228 | else | |
1229 | #endif | |
1230 | { | |
1231 | /* Check for Arm calling Thumb function. */ | |
1232 | if (sym_flags == STT_ARM_TFUNC) | |
1233 | { | |
1234 | elf32_arm_to_thumb_stub (info, sym_name, input_bfd, output_bfd, | |
1235 | input_section, hit_data, sym_sec, rel->r_offset, | |
1236 | signed_addend, value); | |
1237 | return bfd_reloc_ok; | |
1238 | } | |
252b5132 | 1239 | } |
ba96a88f NC |
1240 | |
1241 | if ( strcmp (bfd_get_target (input_bfd), "elf32-littlearm-oabi") == 0 | |
1242 | || strcmp (bfd_get_target (input_bfd), "elf32-bigarm-oabi") == 0) | |
1243 | { | |
1244 | /* The old way of doing things. Trearing the addend as a | |
1245 | byte sized field and adding in the pipeline offset. */ | |
ba96a88f NC |
1246 | value -= (input_section->output_section->vma |
1247 | + input_section->output_offset); | |
1248 | value -= rel->r_offset; | |
1249 | value += addend; | |
f21f3fe0 | 1250 | |
ba96a88f NC |
1251 | if (! globals->no_pipeline_knowledge) |
1252 | value -= 8; | |
1253 | } | |
1254 | else | |
1255 | { | |
1256 | /* The ARM ELF ABI says that this reloc is computed as: S - P + A | |
1257 | where: | |
1258 | S is the address of the symbol in the relocation. | |
1259 | P is address of the instruction being relocated. | |
1260 | A is the addend (extracted from the instruction) in bytes. | |
f21f3fe0 | 1261 | |
ba96a88f NC |
1262 | S is held in 'value'. |
1263 | P is the base address of the section containing the instruction | |
1264 | plus the offset of the reloc into that section, ie: | |
1265 | (input_section->output_section->vma + | |
1266 | input_section->output_offset + | |
1267 | rel->r_offset). | |
1268 | A is the addend, converted into bytes, ie: | |
1269 | (signed_addend * 4) | |
1270 | ||
1271 | Note: None of these operations have knowledge of the pipeline | |
1272 | size of the processor, thus it is up to the assembler to encode | |
1273 | this information into the addend. */ | |
ba96a88f NC |
1274 | value -= (input_section->output_section->vma |
1275 | + input_section->output_offset); | |
1276 | value -= rel->r_offset; | |
1277 | value += (signed_addend << howto->size); | |
f21f3fe0 | 1278 | |
ba96a88f NC |
1279 | /* Previous versions of this code also used to add in the pipeline |
1280 | offset here. This is wrong because the linker is not supposed | |
1281 | to know about such things, and one day it might change. In order | |
1282 | to support old binaries that need the old behaviour however, so | |
1283 | we attempt to detect which ABI was used to create the reloc. */ | |
1284 | if (! globals->no_pipeline_knowledge) | |
f21f3fe0 | 1285 | { |
ba96a88f | 1286 | Elf_Internal_Ehdr * i_ehdrp; /* Elf file header, internal form */ |
f21f3fe0 | 1287 | |
ba96a88f | 1288 | i_ehdrp = elf_elfheader (input_bfd); |
f21f3fe0 | 1289 | |
ba96a88f NC |
1290 | if (i_ehdrp->e_ident[EI_OSABI] == 0) |
1291 | value -= 8; | |
1292 | } | |
1293 | } | |
23080146 | 1294 | |
dcb5e6e6 NC |
1295 | signed_addend = value; |
1296 | signed_addend >>= howto->rightshift; | |
9a5aca8c | 1297 | |
59f2c4e7 NC |
1298 | /* It is not an error for an undefined weak reference to be |
1299 | out of range. Any program that branches to such a symbol | |
9a5aca8c AM |
1300 | is going to crash anyway, so there is no point worrying |
1301 | about getting the destination exactly right. */ | |
59f2c4e7 NC |
1302 | if (! h || h->root.type != bfd_link_hash_undefweak) |
1303 | { | |
9b485d32 | 1304 | /* Perform a signed range check. */ |
dcb5e6e6 | 1305 | if ( signed_addend > ((bfd_signed_vma) (howto->dst_mask >> 1)) |
59f2c4e7 NC |
1306 | || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1))) |
1307 | return bfd_reloc_overflow; | |
1308 | } | |
9a5aca8c | 1309 | |
dcb5e6e6 NC |
1310 | #ifndef OLD_ARM_ABI |
1311 | /* If necessary set the H bit in the BLX instruction. */ | |
1312 | if (r_type == R_ARM_XPC25 && ((value & 2) == 2)) | |
1313 | value = (signed_addend & howto->dst_mask) | |
1314 | | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask)) | |
1315 | | (1 << 24); | |
1316 | else | |
1317 | #endif | |
1318 | value = (signed_addend & howto->dst_mask) | |
1319 | | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask)); | |
252b5132 | 1320 | break; |
f21f3fe0 | 1321 | |
252b5132 RH |
1322 | case R_ARM_ABS32: |
1323 | value += addend; | |
1324 | if (sym_flags == STT_ARM_TFUNC) | |
1325 | value |= 1; | |
1326 | break; | |
f21f3fe0 | 1327 | |
252b5132 RH |
1328 | case R_ARM_REL32: |
1329 | value -= (input_section->output_section->vma | |
62efb346 | 1330 | + input_section->output_offset + rel->r_offset); |
252b5132 RH |
1331 | value += addend; |
1332 | break; | |
1333 | } | |
f21f3fe0 | 1334 | |
252b5132 RH |
1335 | bfd_put_32 (input_bfd, value, hit_data); |
1336 | return bfd_reloc_ok; | |
1337 | ||
1338 | case R_ARM_ABS8: | |
1339 | value += addend; | |
1340 | if ((long) value > 0x7f || (long) value < -0x80) | |
1341 | return bfd_reloc_overflow; | |
1342 | ||
1343 | bfd_put_8 (input_bfd, value, hit_data); | |
1344 | return bfd_reloc_ok; | |
1345 | ||
1346 | case R_ARM_ABS16: | |
1347 | value += addend; | |
1348 | ||
1349 | if ((long) value > 0x7fff || (long) value < -0x8000) | |
1350 | return bfd_reloc_overflow; | |
1351 | ||
1352 | bfd_put_16 (input_bfd, value, hit_data); | |
1353 | return bfd_reloc_ok; | |
1354 | ||
1355 | case R_ARM_ABS12: | |
1356 | /* Support ldr and str instruction for the arm */ | |
1357 | /* Also thumb b (unconditional branch). ??? Really? */ | |
1358 | value += addend; | |
1359 | ||
1360 | if ((long) value > 0x7ff || (long) value < -0x800) | |
1361 | return bfd_reloc_overflow; | |
1362 | ||
1363 | value |= (bfd_get_32 (input_bfd, hit_data) & 0xfffff000); | |
1364 | bfd_put_32 (input_bfd, value, hit_data); | |
1365 | return bfd_reloc_ok; | |
1366 | ||
1367 | case R_ARM_THM_ABS5: | |
9b485d32 | 1368 | /* Support ldr and str instructions for the thumb. */ |
acf8aed4 | 1369 | #if USE_REL |
252b5132 RH |
1370 | /* Need to refetch addend. */ |
1371 | addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask; | |
1372 | /* ??? Need to determine shift amount from operand size. */ | |
1373 | addend >>= howto->rightshift; | |
1374 | #endif | |
1375 | value += addend; | |
1376 | ||
1377 | /* ??? Isn't value unsigned? */ | |
1378 | if ((long) value > 0x1f || (long) value < -0x10) | |
1379 | return bfd_reloc_overflow; | |
1380 | ||
1381 | /* ??? Value needs to be properly shifted into place first. */ | |
1382 | value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f; | |
1383 | bfd_put_16 (input_bfd, value, hit_data); | |
1384 | return bfd_reloc_ok; | |
1385 | ||
dfc5f959 NC |
1386 | #ifndef OLD_ARM_ABI |
1387 | case R_ARM_THM_XPC22: | |
1388 | #endif | |
252b5132 | 1389 | case R_ARM_THM_PC22: |
dfc5f959 | 1390 | /* Thumb BL (branch long instruction). */ |
252b5132 | 1391 | { |
b34976b6 AM |
1392 | bfd_vma relocation; |
1393 | bfd_boolean overflow = FALSE; | |
1394 | bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data); | |
1395 | bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2); | |
df212a7e | 1396 | bfd_signed_vma reloc_signed_max = ((1 << (howto->bitsize - 1)) - 1) >> howto->rightshift; |
ba96a88f | 1397 | bfd_signed_vma reloc_signed_min = ~ reloc_signed_max; |
b34976b6 | 1398 | bfd_vma check; |
252b5132 | 1399 | bfd_signed_vma signed_check; |
252b5132 | 1400 | |
acf8aed4 | 1401 | #if USE_REL |
252b5132 RH |
1402 | /* Need to refetch the addend and squish the two 11 bit pieces |
1403 | together. */ | |
1404 | { | |
ba96a88f NC |
1405 | bfd_vma upper = upper_insn & 0x7ff; |
1406 | bfd_vma lower = lower_insn & 0x7ff; | |
9b485d32 | 1407 | upper = (upper ^ 0x400) - 0x400; /* Sign extend. */ |
252b5132 | 1408 | addend = (upper << 12) | (lower << 1); |
ba96a88f | 1409 | signed_addend = addend; |
252b5132 RH |
1410 | } |
1411 | #endif | |
dfc5f959 NC |
1412 | #ifndef OLD_ARM_ABI |
1413 | if (r_type == R_ARM_THM_XPC22) | |
1414 | { | |
1415 | /* Check for Thumb to Thumb call. */ | |
1416 | /* FIXME: Should we translate the instruction into a BL | |
1417 | instruction instead ? */ | |
1418 | if (sym_flags == STT_ARM_TFUNC) | |
8f615d07 | 1419 | (*_bfd_error_handler) (_("\ |
dfc5f959 | 1420 | %s: Warning: Thumb BLX instruction targets thumb function '%s'."), |
8f615d07 AM |
1421 | bfd_archive_filename (input_bfd), |
1422 | h ? h->root.root.string : "(local)"); | |
dfc5f959 NC |
1423 | } |
1424 | else | |
1425 | #endif | |
252b5132 | 1426 | { |
dfc5f959 NC |
1427 | /* If it is not a call to Thumb, assume call to Arm. |
1428 | If it is a call relative to a section name, then it is not a | |
1429 | function call at all, but rather a long jump. */ | |
1430 | if (sym_flags != STT_ARM_TFUNC && sym_flags != STT_SECTION) | |
1431 | { | |
1432 | if (elf32_thumb_to_arm_stub | |
1433 | (info, sym_name, input_bfd, output_bfd, input_section, | |
1434 | hit_data, sym_sec, rel->r_offset, signed_addend, value)) | |
1435 | return bfd_reloc_ok; | |
1436 | else | |
1437 | return bfd_reloc_dangerous; | |
1438 | } | |
252b5132 | 1439 | } |
f21f3fe0 | 1440 | |
ba96a88f | 1441 | relocation = value + signed_addend; |
f21f3fe0 | 1442 | |
252b5132 | 1443 | relocation -= (input_section->output_section->vma |
ba96a88f NC |
1444 | + input_section->output_offset |
1445 | + rel->r_offset); | |
9a5aca8c | 1446 | |
ba96a88f NC |
1447 | if (! globals->no_pipeline_knowledge) |
1448 | { | |
9b485d32 | 1449 | Elf_Internal_Ehdr * i_ehdrp; /* Elf file header, internal form. */ |
9a5aca8c | 1450 | |
ba96a88f | 1451 | i_ehdrp = elf_elfheader (input_bfd); |
f21f3fe0 | 1452 | |
ba96a88f NC |
1453 | /* Previous versions of this code also used to add in the pipline |
1454 | offset here. This is wrong because the linker is not supposed | |
1455 | to know about such things, and one day it might change. In order | |
1456 | to support old binaries that need the old behaviour however, so | |
1457 | we attempt to detect which ABI was used to create the reloc. */ | |
1458 | if ( strcmp (bfd_get_target (input_bfd), "elf32-littlearm-oabi") == 0 | |
1459 | || strcmp (bfd_get_target (input_bfd), "elf32-bigarm-oabi") == 0 | |
1460 | || i_ehdrp->e_ident[EI_OSABI] == 0) | |
1461 | relocation += 4; | |
1462 | } | |
f21f3fe0 | 1463 | |
252b5132 RH |
1464 | check = relocation >> howto->rightshift; |
1465 | ||
1466 | /* If this is a signed value, the rightshift just dropped | |
1467 | leading 1 bits (assuming twos complement). */ | |
1468 | if ((bfd_signed_vma) relocation >= 0) | |
1469 | signed_check = check; | |
1470 | else | |
1471 | signed_check = check | ~((bfd_vma) -1 >> howto->rightshift); | |
1472 | ||
252b5132 | 1473 | /* Assumes two's complement. */ |
ba96a88f | 1474 | if (signed_check > reloc_signed_max || signed_check < reloc_signed_min) |
b34976b6 | 1475 | overflow = TRUE; |
252b5132 | 1476 | |
df425bc0 | 1477 | #ifndef OLD_ARM_ABI |
4f3c3dbb NC |
1478 | if (r_type == R_ARM_THM_XPC22 |
1479 | && ((lower_insn & 0x1800) == 0x0800)) | |
c62e1cc3 NC |
1480 | /* For a BLX instruction, make sure that the relocation is rounded up |
1481 | to a word boundary. This follows the semantics of the instruction | |
1482 | which specifies that bit 1 of the target address will come from bit | |
1483 | 1 of the base address. */ | |
1484 | relocation = (relocation + 2) & ~ 3; | |
99e4ae17 | 1485 | #endif |
c62e1cc3 NC |
1486 | /* Put RELOCATION back into the insn. */ |
1487 | upper_insn = (upper_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 12) & 0x7ff); | |
1488 | lower_insn = (lower_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 1) & 0x7ff); | |
1489 | ||
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 | { | |
6cf9e9fe | 1501 | bfd_signed_vma relocation; |
51c5503b NC |
1502 | bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1; |
1503 | bfd_signed_vma reloc_signed_min = ~ reloc_signed_max; | |
51c5503b NC |
1504 | bfd_signed_vma signed_check; |
1505 | ||
acf8aed4 | 1506 | #if USE_REL |
51c5503b NC |
1507 | /* Need to refetch addend. */ |
1508 | addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask; | |
6cf9e9fe NC |
1509 | if (addend & ((howto->src_mask + 1) >> 1)) |
1510 | { | |
1511 | signed_addend = -1; | |
1512 | signed_addend &= ~ howto->src_mask; | |
1513 | signed_addend |= addend; | |
1514 | } | |
1515 | else | |
1516 | signed_addend = addend; | |
1517 | /* The value in the insn has been right shifted. We need to | |
1518 | undo this, so that we can perform the address calculation | |
1519 | in terms of bytes. */ | |
1520 | signed_addend <<= howto->rightshift; | |
51c5503b | 1521 | #endif |
6cf9e9fe | 1522 | relocation = value + signed_addend; |
51c5503b NC |
1523 | |
1524 | relocation -= (input_section->output_section->vma | |
1525 | + input_section->output_offset | |
1526 | + rel->r_offset); | |
1527 | ||
6cf9e9fe NC |
1528 | relocation >>= howto->rightshift; |
1529 | signed_check = relocation; | |
1530 | relocation &= howto->dst_mask; | |
51c5503b | 1531 | relocation |= (bfd_get_16 (input_bfd, hit_data) & (~ howto->dst_mask)); |
cedb70c5 | 1532 | |
51c5503b NC |
1533 | bfd_put_16 (input_bfd, relocation, hit_data); |
1534 | ||
1535 | /* Assumes two's complement. */ | |
1536 | if (signed_check > reloc_signed_max || signed_check < reloc_signed_min) | |
1537 | return bfd_reloc_overflow; | |
1538 | ||
1539 | return bfd_reloc_ok; | |
1540 | } | |
cedb70c5 | 1541 | |
252b5132 RH |
1542 | case R_ARM_GNU_VTINHERIT: |
1543 | case R_ARM_GNU_VTENTRY: | |
1544 | return bfd_reloc_ok; | |
1545 | ||
1546 | case R_ARM_COPY: | |
1547 | return bfd_reloc_notsupported; | |
1548 | ||
1549 | case R_ARM_GLOB_DAT: | |
1550 | return bfd_reloc_notsupported; | |
1551 | ||
1552 | case R_ARM_JUMP_SLOT: | |
1553 | return bfd_reloc_notsupported; | |
1554 | ||
1555 | case R_ARM_RELATIVE: | |
1556 | return bfd_reloc_notsupported; | |
1557 | ||
1558 | case R_ARM_GOTOFF: | |
1559 | /* Relocation is relative to the start of the | |
1560 | global offset table. */ | |
1561 | ||
1562 | BFD_ASSERT (sgot != NULL); | |
1563 | if (sgot == NULL) | |
1564 | return bfd_reloc_notsupported; | |
9a5aca8c | 1565 | |
cedb70c5 | 1566 | /* If we are addressing a Thumb function, we need to adjust the |
ee29b9fb RE |
1567 | address by one, so that attempts to call the function pointer will |
1568 | correctly interpret it as Thumb code. */ | |
1569 | if (sym_flags == STT_ARM_TFUNC) | |
1570 | value += 1; | |
1571 | ||
252b5132 RH |
1572 | /* Note that sgot->output_offset is not involved in this |
1573 | calculation. We always want the start of .got. If we | |
1574 | define _GLOBAL_OFFSET_TABLE in a different way, as is | |
1575 | permitted by the ABI, we might have to change this | |
9b485d32 | 1576 | calculation. */ |
252b5132 | 1577 | value -= sgot->output_section->vma; |
f21f3fe0 | 1578 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
99e4ae17 AJ |
1579 | contents, rel->r_offset, value, |
1580 | (bfd_vma) 0); | |
252b5132 RH |
1581 | |
1582 | case R_ARM_GOTPC: | |
a7c10850 | 1583 | /* Use global offset table as symbol value. */ |
252b5132 | 1584 | BFD_ASSERT (sgot != NULL); |
f21f3fe0 | 1585 | |
252b5132 RH |
1586 | if (sgot == NULL) |
1587 | return bfd_reloc_notsupported; | |
1588 | ||
1589 | value = sgot->output_section->vma; | |
f21f3fe0 | 1590 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
99e4ae17 AJ |
1591 | contents, rel->r_offset, value, |
1592 | (bfd_vma) 0); | |
f21f3fe0 | 1593 | |
252b5132 RH |
1594 | case R_ARM_GOT32: |
1595 | /* Relocation is to the entry for this symbol in the | |
9b485d32 | 1596 | global offset table. */ |
252b5132 RH |
1597 | if (sgot == NULL) |
1598 | return bfd_reloc_notsupported; | |
f21f3fe0 | 1599 | |
252b5132 RH |
1600 | if (h != NULL) |
1601 | { | |
1602 | bfd_vma off; | |
f21f3fe0 | 1603 | |
252b5132 RH |
1604 | off = h->got.offset; |
1605 | BFD_ASSERT (off != (bfd_vma) -1); | |
f21f3fe0 | 1606 | |
252b5132 RH |
1607 | if (!elf_hash_table (info)->dynamic_sections_created || |
1608 | (info->shared && (info->symbolic || h->dynindx == -1) | |
1609 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))) | |
1610 | { | |
1611 | /* This is actually a static link, or it is a -Bsymbolic link | |
1612 | and the symbol is defined locally. We must initialize this | |
1613 | entry in the global offset table. Since the offset must | |
1614 | always be a multiple of 4, we use the least significant bit | |
1615 | to record whether we have initialized it already. | |
f21f3fe0 | 1616 | |
252b5132 | 1617 | When doing a dynamic link, we create a .rel.got relocation |
f21f3fe0 | 1618 | entry to initialize the value. This is done in the |
9b485d32 | 1619 | finish_dynamic_symbol routine. */ |
252b5132 RH |
1620 | if ((off & 1) != 0) |
1621 | off &= ~1; | |
1622 | else | |
1623 | { | |
ee29b9fb RE |
1624 | /* If we are addressing a Thumb function, we need to |
1625 | adjust the address by one, so that attempts to | |
1626 | call the function pointer will correctly | |
1627 | interpret it as Thumb code. */ | |
1628 | if (sym_flags == STT_ARM_TFUNC) | |
1629 | value |= 1; | |
1630 | ||
252b5132 RH |
1631 | bfd_put_32 (output_bfd, value, sgot->contents + off); |
1632 | h->got.offset |= 1; | |
1633 | } | |
1634 | } | |
f21f3fe0 | 1635 | |
252b5132 RH |
1636 | value = sgot->output_offset + off; |
1637 | } | |
1638 | else | |
1639 | { | |
1640 | bfd_vma off; | |
f21f3fe0 | 1641 | |
252b5132 RH |
1642 | BFD_ASSERT (local_got_offsets != NULL && |
1643 | local_got_offsets[r_symndx] != (bfd_vma) -1); | |
f21f3fe0 | 1644 | |
252b5132 | 1645 | off = local_got_offsets[r_symndx]; |
f21f3fe0 | 1646 | |
252b5132 RH |
1647 | /* The offset must always be a multiple of 4. We use the |
1648 | least significant bit to record whether we have already | |
9b485d32 | 1649 | generated the necessary reloc. */ |
252b5132 RH |
1650 | if ((off & 1) != 0) |
1651 | off &= ~1; | |
1652 | else | |
1653 | { | |
1654 | bfd_put_32 (output_bfd, value, sgot->contents + off); | |
f21f3fe0 | 1655 | |
252b5132 RH |
1656 | if (info->shared) |
1657 | { | |
1658 | asection * srelgot; | |
947216bf AM |
1659 | Elf_Internal_Rela outrel; |
1660 | bfd_byte *loc; | |
f21f3fe0 | 1661 | |
252b5132 RH |
1662 | srelgot = bfd_get_section_by_name (dynobj, ".rel.got"); |
1663 | BFD_ASSERT (srelgot != NULL); | |
f21f3fe0 | 1664 | |
252b5132 | 1665 | outrel.r_offset = (sgot->output_section->vma |
f21f3fe0 | 1666 | + sgot->output_offset |
252b5132 RH |
1667 | + off); |
1668 | outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE); | |
947216bf AM |
1669 | loc = srelgot->contents; |
1670 | loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rel); | |
1671 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); | |
252b5132 | 1672 | } |
f21f3fe0 | 1673 | |
252b5132 RH |
1674 | local_got_offsets[r_symndx] |= 1; |
1675 | } | |
f21f3fe0 | 1676 | |
252b5132 RH |
1677 | value = sgot->output_offset + off; |
1678 | } | |
9a5aca8c | 1679 | |
f21f3fe0 | 1680 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
99e4ae17 AJ |
1681 | contents, rel->r_offset, value, |
1682 | (bfd_vma) 0); | |
f21f3fe0 | 1683 | |
252b5132 RH |
1684 | case R_ARM_PLT32: |
1685 | /* Relocation is to the entry for this symbol in the | |
1686 | procedure linkage table. */ | |
1687 | ||
1688 | /* Resolve a PLT32 reloc against a local symbol directly, | |
9b485d32 | 1689 | without using the procedure linkage table. */ |
252b5132 RH |
1690 | if (h == NULL) |
1691 | return _bfd_final_link_relocate (howto, input_bfd, input_section, | |
99e4ae17 AJ |
1692 | contents, rel->r_offset, value, |
1693 | (bfd_vma) 0); | |
252b5132 RH |
1694 | |
1695 | if (h->plt.offset == (bfd_vma) -1) | |
1696 | /* We didn't make a PLT entry for this symbol. This | |
1697 | happens when statically linking PIC code, or when | |
1698 | using -Bsymbolic. */ | |
1699 | return _bfd_final_link_relocate (howto, input_bfd, input_section, | |
1700 | contents, rel->r_offset, value, | |
1701 | (bfd_vma) 0); | |
1702 | ||
1703 | BFD_ASSERT(splt != NULL); | |
1704 | if (splt == NULL) | |
1705 | return bfd_reloc_notsupported; | |
1706 | ||
1707 | value = (splt->output_section->vma | |
1708 | + splt->output_offset | |
1709 | + h->plt.offset); | |
1710 | return _bfd_final_link_relocate (howto, input_bfd, input_section, | |
99e4ae17 AJ |
1711 | contents, rel->r_offset, value, |
1712 | (bfd_vma) 0); | |
f21f3fe0 | 1713 | |
252b5132 RH |
1714 | case R_ARM_SBREL32: |
1715 | return bfd_reloc_notsupported; | |
1716 | ||
1717 | case R_ARM_AMP_VCALL9: | |
1718 | return bfd_reloc_notsupported; | |
1719 | ||
1720 | case R_ARM_RSBREL32: | |
1721 | return bfd_reloc_notsupported; | |
1722 | ||
1723 | case R_ARM_THM_RPC22: | |
1724 | return bfd_reloc_notsupported; | |
1725 | ||
1726 | case R_ARM_RREL32: | |
1727 | return bfd_reloc_notsupported; | |
1728 | ||
1729 | case R_ARM_RABS32: | |
1730 | return bfd_reloc_notsupported; | |
1731 | ||
1732 | case R_ARM_RPC24: | |
1733 | return bfd_reloc_notsupported; | |
1734 | ||
1735 | case R_ARM_RBASE: | |
1736 | return bfd_reloc_notsupported; | |
1737 | ||
1738 | default: | |
1739 | return bfd_reloc_notsupported; | |
1740 | } | |
1741 | } | |
1742 | ||
acf8aed4 | 1743 | #if USE_REL |
98c1d4aa NC |
1744 | /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */ |
1745 | static void | |
1746 | arm_add_to_rel (abfd, address, howto, increment) | |
1747 | bfd * abfd; | |
59f2c4e7 | 1748 | bfd_byte * address; |
98c1d4aa NC |
1749 | reloc_howto_type * howto; |
1750 | bfd_signed_vma increment; | |
1751 | { | |
98c1d4aa NC |
1752 | bfd_signed_vma addend; |
1753 | ||
9a5aca8c | 1754 | if (howto->type == R_ARM_THM_PC22) |
98c1d4aa | 1755 | { |
9a5aca8c AM |
1756 | int upper_insn, lower_insn; |
1757 | int upper, lower; | |
98c1d4aa | 1758 | |
9a5aca8c AM |
1759 | upper_insn = bfd_get_16 (abfd, address); |
1760 | lower_insn = bfd_get_16 (abfd, address + 2); | |
1761 | upper = upper_insn & 0x7ff; | |
1762 | lower = lower_insn & 0x7ff; | |
1763 | ||
1764 | addend = (upper << 12) | (lower << 1); | |
ddda4409 | 1765 | addend += increment; |
9a5aca8c | 1766 | addend >>= 1; |
98c1d4aa | 1767 | |
9a5aca8c AM |
1768 | upper_insn = (upper_insn & 0xf800) | ((addend >> 11) & 0x7ff); |
1769 | lower_insn = (lower_insn & 0xf800) | (addend & 0x7ff); | |
1770 | ||
dc810e39 AM |
1771 | bfd_put_16 (abfd, (bfd_vma) upper_insn, address); |
1772 | bfd_put_16 (abfd, (bfd_vma) lower_insn, address + 2); | |
9a5aca8c AM |
1773 | } |
1774 | else | |
1775 | { | |
1776 | bfd_vma contents; | |
1777 | ||
1778 | contents = bfd_get_32 (abfd, address); | |
1779 | ||
1780 | /* Get the (signed) value from the instruction. */ | |
1781 | addend = contents & howto->src_mask; | |
1782 | if (addend & ((howto->src_mask + 1) >> 1)) | |
1783 | { | |
1784 | bfd_signed_vma mask; | |
1785 | ||
1786 | mask = -1; | |
1787 | mask &= ~ howto->src_mask; | |
1788 | addend |= mask; | |
1789 | } | |
1790 | ||
1791 | /* Add in the increment, (which is a byte value). */ | |
1792 | switch (howto->type) | |
1793 | { | |
1794 | default: | |
1795 | addend += increment; | |
1796 | break; | |
1797 | ||
1798 | case R_ARM_PC24: | |
1799 | addend <<= howto->size; | |
dc810e39 | 1800 | addend += increment; |
9a5aca8c AM |
1801 | |
1802 | /* Should we check for overflow here ? */ | |
1803 | ||
1804 | /* Drop any undesired bits. */ | |
1805 | addend >>= howto->rightshift; | |
1806 | break; | |
1807 | } | |
1808 | ||
1809 | contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask); | |
1810 | ||
1811 | bfd_put_32 (abfd, contents, address); | |
ddda4409 | 1812 | } |
98c1d4aa NC |
1813 | } |
1814 | #endif /* USE_REL */ | |
252b5132 RH |
1815 | |
1816 | /* Relocate an ARM ELF section. */ | |
b34976b6 | 1817 | static bfd_boolean |
252b5132 RH |
1818 | elf32_arm_relocate_section (output_bfd, info, input_bfd, input_section, |
1819 | contents, relocs, local_syms, local_sections) | |
b34976b6 AM |
1820 | bfd *output_bfd; |
1821 | struct bfd_link_info *info; | |
1822 | bfd *input_bfd; | |
1823 | asection *input_section; | |
1824 | bfd_byte *contents; | |
1825 | Elf_Internal_Rela *relocs; | |
1826 | Elf_Internal_Sym *local_syms; | |
1827 | asection **local_sections; | |
252b5132 | 1828 | { |
b34976b6 AM |
1829 | Elf_Internal_Shdr *symtab_hdr; |
1830 | struct elf_link_hash_entry **sym_hashes; | |
1831 | Elf_Internal_Rela *rel; | |
1832 | Elf_Internal_Rela *relend; | |
1833 | const char *name; | |
252b5132 | 1834 | |
acf8aed4 | 1835 | #if !USE_REL |
b491616a | 1836 | if (info->relocateable) |
b34976b6 | 1837 | return TRUE; |
b491616a AM |
1838 | #endif |
1839 | ||
252b5132 RH |
1840 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; |
1841 | sym_hashes = elf_sym_hashes (input_bfd); | |
1842 | ||
1843 | rel = relocs; | |
1844 | relend = relocs + input_section->reloc_count; | |
1845 | for (; rel < relend; rel++) | |
1846 | { | |
ba96a88f NC |
1847 | int r_type; |
1848 | reloc_howto_type * howto; | |
1849 | unsigned long r_symndx; | |
1850 | Elf_Internal_Sym * sym; | |
1851 | asection * sec; | |
252b5132 | 1852 | struct elf_link_hash_entry * h; |
ba96a88f NC |
1853 | bfd_vma relocation; |
1854 | bfd_reloc_status_type r; | |
1855 | arelent bfd_reloc; | |
f21f3fe0 | 1856 | |
252b5132 | 1857 | r_symndx = ELF32_R_SYM (rel->r_info); |
ba96a88f | 1858 | r_type = ELF32_R_TYPE (rel->r_info); |
252b5132 | 1859 | |
ba96a88f NC |
1860 | if ( r_type == R_ARM_GNU_VTENTRY |
1861 | || r_type == R_ARM_GNU_VTINHERIT) | |
252b5132 RH |
1862 | continue; |
1863 | ||
dc810e39 | 1864 | elf32_arm_info_to_howto (input_bfd, & bfd_reloc, rel); |
ba96a88f | 1865 | howto = bfd_reloc.howto; |
252b5132 | 1866 | |
acf8aed4 | 1867 | #if USE_REL |
252b5132 RH |
1868 | if (info->relocateable) |
1869 | { | |
1870 | /* This is a relocateable link. We don't have to change | |
1871 | anything, unless the reloc is against a section symbol, | |
1872 | in which case we have to adjust according to where the | |
1873 | section symbol winds up in the output section. */ | |
1874 | if (r_symndx < symtab_hdr->sh_info) | |
1875 | { | |
1876 | sym = local_syms + r_symndx; | |
1877 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
1878 | { | |
1879 | sec = local_sections[r_symndx]; | |
98c1d4aa | 1880 | arm_add_to_rel (input_bfd, contents + rel->r_offset, |
dc810e39 AM |
1881 | howto, |
1882 | (bfd_signed_vma) (sec->output_offset | |
1883 | + sym->st_value)); | |
252b5132 RH |
1884 | } |
1885 | } | |
1886 | ||
1887 | continue; | |
1888 | } | |
b491616a | 1889 | #endif |
252b5132 RH |
1890 | |
1891 | /* This is a final link. */ | |
1892 | h = NULL; | |
1893 | sym = NULL; | |
1894 | sec = NULL; | |
9b485d32 | 1895 | |
252b5132 RH |
1896 | if (r_symndx < symtab_hdr->sh_info) |
1897 | { | |
1898 | sym = local_syms + r_symndx; | |
1899 | sec = local_sections[r_symndx]; | |
acf8aed4 | 1900 | #if USE_REL |
252b5132 RH |
1901 | relocation = (sec->output_section->vma |
1902 | + sec->output_offset | |
1903 | + sym->st_value); | |
f8df10f4 JJ |
1904 | if ((sec->flags & SEC_MERGE) |
1905 | && ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
1906 | { | |
1907 | asection *msec; | |
1908 | bfd_vma addend, value; | |
1909 | ||
1910 | if (howto->rightshift) | |
1911 | { | |
1912 | (*_bfd_error_handler) | |
1913 | (_("%s(%s+0x%lx): %s relocation against SEC_MERGE section"), | |
1914 | bfd_archive_filename (input_bfd), | |
1915 | bfd_get_section_name (input_bfd, input_section), | |
1916 | (long) rel->r_offset, howto->name); | |
b34976b6 | 1917 | return FALSE; |
f8df10f4 JJ |
1918 | } |
1919 | ||
1920 | value = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
1921 | ||
1922 | /* Get the (signed) value from the instruction. */ | |
1923 | addend = value & howto->src_mask; | |
1924 | if (addend & ((howto->src_mask + 1) >> 1)) | |
1925 | { | |
1926 | bfd_signed_vma mask; | |
1927 | ||
1928 | mask = -1; | |
1929 | mask &= ~ howto->src_mask; | |
1930 | addend |= mask; | |
1931 | } | |
1932 | msec = sec; | |
1933 | addend = | |
c629eae0 | 1934 | _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend) |
f8df10f4 JJ |
1935 | - relocation; |
1936 | addend += msec->output_section->vma + msec->output_offset; | |
1937 | value = (value & ~ howto->dst_mask) | (addend & howto->dst_mask); | |
1938 | bfd_put_32 (input_bfd, value, contents + rel->r_offset); | |
1939 | } | |
1940 | #else | |
1941 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel); | |
1942 | #endif | |
252b5132 RH |
1943 | } |
1944 | else | |
1945 | { | |
1946 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
9b485d32 NC |
1947 | |
1948 | while ( h->root.type == bfd_link_hash_indirect | |
252b5132 RH |
1949 | || h->root.type == bfd_link_hash_warning) |
1950 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
9b485d32 NC |
1951 | |
1952 | if ( h->root.type == bfd_link_hash_defined | |
252b5132 RH |
1953 | || h->root.type == bfd_link_hash_defweak) |
1954 | { | |
780a67af | 1955 | int relocation_needed = 1; |
f21f3fe0 | 1956 | |
780a67af | 1957 | sec = h->root.u.def.section; |
f21f3fe0 | 1958 | |
252b5132 | 1959 | /* In these cases, we don't need the relocation value. |
f21f3fe0 | 1960 | We check specially because in some obscure cases |
9b485d32 | 1961 | sec->output_section will be NULL. */ |
252b5132 RH |
1962 | switch (r_type) |
1963 | { | |
1964 | case R_ARM_PC24: | |
1965 | case R_ARM_ABS32: | |
6a360bf4 | 1966 | case R_ARM_THM_PC22: |
252b5132 RH |
1967 | if (info->shared |
1968 | && ( | |
99e4ae17 | 1969 | (!info->symbolic && h->dynindx != -1) |
97eaf9de | 1970 | || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 |
252b5132 | 1971 | ) |
05924f36 PB |
1972 | && ((input_section->flags & SEC_ALLOC) != 0 |
1973 | /* DWARF will emit R_ARM_ABS32 relocations in its | |
1974 | sections against symbols defined externally | |
1975 | in shared libraries. We can't do anything | |
1976 | with them here. */ | |
1977 | || ((input_section->flags & SEC_DEBUGGING) != 0 | |
1978 | && (h->elf_link_hash_flags | |
1979 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0)) | |
252b5132 | 1980 | ) |
780a67af | 1981 | relocation_needed = 0; |
252b5132 | 1982 | break; |
f21f3fe0 | 1983 | |
252b5132 | 1984 | case R_ARM_GOTPC: |
780a67af | 1985 | relocation_needed = 0; |
252b5132 | 1986 | break; |
f21f3fe0 | 1987 | |
252b5132 RH |
1988 | case R_ARM_GOT32: |
1989 | if (elf_hash_table(info)->dynamic_sections_created | |
1990 | && (!info->shared | |
1991 | || (!info->symbolic && h->dynindx != -1) | |
1992 | || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 | |
1993 | ) | |
1994 | ) | |
780a67af | 1995 | relocation_needed = 0; |
252b5132 | 1996 | break; |
f21f3fe0 | 1997 | |
252b5132 RH |
1998 | case R_ARM_PLT32: |
1999 | if (h->plt.offset != (bfd_vma)-1) | |
780a67af | 2000 | relocation_needed = 0; |
252b5132 | 2001 | break; |
f21f3fe0 | 2002 | |
252b5132 RH |
2003 | default: |
2004 | if (sec->output_section == NULL) | |
2005 | { | |
2006 | (*_bfd_error_handler) | |
6a360bf4 NC |
2007 | (_("%s: warning: unresolvable relocation %d against symbol `%s' from %s section"), |
2008 | bfd_archive_filename (input_bfd), | |
2009 | r_type, | |
2010 | h->root.root.string, | |
252b5132 | 2011 | bfd_get_section_name (input_bfd, input_section)); |
780a67af | 2012 | relocation_needed = 0; |
252b5132 RH |
2013 | } |
2014 | } | |
780a67af NC |
2015 | |
2016 | if (relocation_needed) | |
2017 | relocation = h->root.u.def.value | |
2018 | + sec->output_section->vma | |
2019 | + sec->output_offset; | |
2020 | else | |
2021 | relocation = 0; | |
252b5132 RH |
2022 | } |
2023 | else if (h->root.type == bfd_link_hash_undefweak) | |
2024 | relocation = 0; | |
3a27a730 L |
2025 | else if (info->shared && !info->symbolic |
2026 | && !info->no_undefined | |
2027 | && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) | |
a72747a3 | 2028 | relocation = 0; |
252b5132 RH |
2029 | else |
2030 | { | |
2031 | if (!((*info->callbacks->undefined_symbol) | |
2032 | (info, h->root.root.string, input_bfd, | |
5cc7c785 | 2033 | input_section, rel->r_offset, |
3a27a730 L |
2034 | (!info->shared || info->no_undefined |
2035 | || ELF_ST_VISIBILITY (h->other))))) | |
b34976b6 | 2036 | return FALSE; |
252b5132 RH |
2037 | relocation = 0; |
2038 | } | |
2039 | } | |
2040 | ||
2041 | if (h != NULL) | |
2042 | name = h->root.root.string; | |
2043 | else | |
2044 | { | |
2045 | name = (bfd_elf_string_from_elf_section | |
2046 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); | |
2047 | if (name == NULL || *name == '\0') | |
2048 | name = bfd_section_name (input_bfd, sec); | |
2049 | } | |
f21f3fe0 | 2050 | |
252b5132 RH |
2051 | r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd, |
2052 | input_section, contents, rel, | |
2053 | relocation, info, sec, name, | |
2054 | (h ? ELF_ST_TYPE (h->type) : | |
780a67af | 2055 | ELF_ST_TYPE (sym->st_info)), h); |
252b5132 RH |
2056 | |
2057 | if (r != bfd_reloc_ok) | |
2058 | { | |
2059 | const char * msg = (const char *) 0; | |
2060 | ||
2061 | switch (r) | |
2062 | { | |
2063 | case bfd_reloc_overflow: | |
cf919dfd PB |
2064 | /* If the overflowing reloc was to an undefined symbol, |
2065 | we have already printed one error message and there | |
2066 | is no point complaining again. */ | |
2067 | if ((! h || | |
2068 | h->root.type != bfd_link_hash_undefined) | |
2069 | && (!((*info->callbacks->reloc_overflow) | |
2070 | (info, name, howto->name, (bfd_vma) 0, | |
2071 | input_bfd, input_section, rel->r_offset)))) | |
b34976b6 | 2072 | return FALSE; |
252b5132 RH |
2073 | break; |
2074 | ||
2075 | case bfd_reloc_undefined: | |
2076 | if (!((*info->callbacks->undefined_symbol) | |
2077 | (info, name, input_bfd, input_section, | |
b34976b6 AM |
2078 | rel->r_offset, TRUE))) |
2079 | return FALSE; | |
252b5132 RH |
2080 | break; |
2081 | ||
2082 | case bfd_reloc_outofrange: | |
9b485d32 | 2083 | msg = _("internal error: out of range error"); |
252b5132 RH |
2084 | goto common_error; |
2085 | ||
2086 | case bfd_reloc_notsupported: | |
9b485d32 | 2087 | msg = _("internal error: unsupported relocation error"); |
252b5132 RH |
2088 | goto common_error; |
2089 | ||
2090 | case bfd_reloc_dangerous: | |
9b485d32 | 2091 | msg = _("internal error: dangerous error"); |
252b5132 RH |
2092 | goto common_error; |
2093 | ||
2094 | default: | |
9b485d32 | 2095 | msg = _("internal error: unknown error"); |
252b5132 RH |
2096 | /* fall through */ |
2097 | ||
2098 | common_error: | |
2099 | if (!((*info->callbacks->warning) | |
2100 | (info, msg, name, input_bfd, input_section, | |
2101 | rel->r_offset))) | |
b34976b6 | 2102 | return FALSE; |
252b5132 RH |
2103 | break; |
2104 | } | |
2105 | } | |
2106 | } | |
2107 | ||
b34976b6 | 2108 | return TRUE; |
252b5132 RH |
2109 | } |
2110 | ||
fc830a83 | 2111 | /* Function to keep ARM specific flags in the ELF header. */ |
b34976b6 | 2112 | static bfd_boolean |
252b5132 RH |
2113 | elf32_arm_set_private_flags (abfd, flags) |
2114 | bfd *abfd; | |
2115 | flagword flags; | |
2116 | { | |
2117 | if (elf_flags_init (abfd) | |
2118 | && elf_elfheader (abfd)->e_flags != flags) | |
2119 | { | |
fc830a83 NC |
2120 | if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN) |
2121 | { | |
fd2ec330 | 2122 | if (flags & EF_ARM_INTERWORK) |
8f615d07 | 2123 | (*_bfd_error_handler) (_("\ |
ae1a89b7 | 2124 | Warning: Not setting interworking flag of %s since it has already been specified as non-interworking"), |
8f615d07 | 2125 | bfd_archive_filename (abfd)); |
fc830a83 | 2126 | else |
63b0f745 | 2127 | _bfd_error_handler (_("\ |
ae1a89b7 | 2128 | Warning: Clearing the interworking flag of %s due to outside request"), |
63b0f745 | 2129 | bfd_archive_filename (abfd)); |
fc830a83 | 2130 | } |
252b5132 RH |
2131 | } |
2132 | else | |
2133 | { | |
2134 | elf_elfheader (abfd)->e_flags = flags; | |
b34976b6 | 2135 | elf_flags_init (abfd) = TRUE; |
252b5132 RH |
2136 | } |
2137 | ||
b34976b6 | 2138 | return TRUE; |
252b5132 RH |
2139 | } |
2140 | ||
fc830a83 | 2141 | /* Copy backend specific data from one object module to another. */ |
9b485d32 | 2142 | |
b34976b6 | 2143 | static bfd_boolean |
252b5132 RH |
2144 | elf32_arm_copy_private_bfd_data (ibfd, obfd) |
2145 | bfd *ibfd; | |
2146 | bfd *obfd; | |
2147 | { | |
2148 | flagword in_flags; | |
2149 | flagword out_flags; | |
2150 | ||
fc830a83 | 2151 | if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
252b5132 | 2152 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
b34976b6 | 2153 | return TRUE; |
252b5132 | 2154 | |
fc830a83 | 2155 | in_flags = elf_elfheader (ibfd)->e_flags; |
252b5132 RH |
2156 | out_flags = elf_elfheader (obfd)->e_flags; |
2157 | ||
fc830a83 NC |
2158 | if (elf_flags_init (obfd) |
2159 | && EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN | |
2160 | && in_flags != out_flags) | |
252b5132 | 2161 | { |
252b5132 | 2162 | /* Cannot mix APCS26 and APCS32 code. */ |
fd2ec330 | 2163 | if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26)) |
b34976b6 | 2164 | return FALSE; |
252b5132 RH |
2165 | |
2166 | /* Cannot mix float APCS and non-float APCS code. */ | |
fd2ec330 | 2167 | if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT)) |
b34976b6 | 2168 | return FALSE; |
252b5132 RH |
2169 | |
2170 | /* If the src and dest have different interworking flags | |
2171 | then turn off the interworking bit. */ | |
fd2ec330 | 2172 | if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK)) |
252b5132 | 2173 | { |
fd2ec330 | 2174 | if (out_flags & EF_ARM_INTERWORK) |
63b0f745 | 2175 | _bfd_error_handler (_("\ |
ae1a89b7 | 2176 | Warning: Clearing the interworking flag of %s because non-interworking code in %s has been linked with it"), |
06317a27 | 2177 | bfd_get_filename (obfd), |
63b0f745 | 2178 | bfd_archive_filename (ibfd)); |
252b5132 | 2179 | |
fd2ec330 | 2180 | in_flags &= ~EF_ARM_INTERWORK; |
252b5132 | 2181 | } |
1006ba19 PB |
2182 | |
2183 | /* Likewise for PIC, though don't warn for this case. */ | |
fd2ec330 PB |
2184 | if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC)) |
2185 | in_flags &= ~EF_ARM_PIC; | |
252b5132 RH |
2186 | } |
2187 | ||
2188 | elf_elfheader (obfd)->e_flags = in_flags; | |
b34976b6 | 2189 | elf_flags_init (obfd) = TRUE; |
252b5132 | 2190 | |
b34976b6 | 2191 | return TRUE; |
252b5132 RH |
2192 | } |
2193 | ||
2194 | /* Merge backend specific data from an object file to the output | |
2195 | object file when linking. */ | |
9b485d32 | 2196 | |
b34976b6 | 2197 | static bfd_boolean |
252b5132 | 2198 | elf32_arm_merge_private_bfd_data (ibfd, obfd) |
fc830a83 NC |
2199 | bfd * ibfd; |
2200 | bfd * obfd; | |
252b5132 RH |
2201 | { |
2202 | flagword out_flags; | |
2203 | flagword in_flags; | |
b34976b6 AM |
2204 | bfd_boolean flags_compatible = TRUE; |
2205 | bfd_boolean null_input_bfd = TRUE; | |
cf919dfd | 2206 | asection *sec; |
252b5132 | 2207 | |
9b485d32 | 2208 | /* Check if we have the same endianess. */ |
82e51918 | 2209 | if (! _bfd_generic_verify_endian_match (ibfd, obfd)) |
b34976b6 | 2210 | return FALSE; |
1fe494a5 | 2211 | |
252b5132 RH |
2212 | if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
2213 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
b34976b6 | 2214 | return TRUE; |
252b5132 | 2215 | |
252b5132 RH |
2216 | /* The input BFD must have had its flags initialised. */ |
2217 | /* The following seems bogus to me -- The flags are initialized in | |
2218 | the assembler but I don't think an elf_flags_init field is | |
9b485d32 | 2219 | written into the object. */ |
252b5132 RH |
2220 | /* BFD_ASSERT (elf_flags_init (ibfd)); */ |
2221 | ||
2222 | in_flags = elf_elfheader (ibfd)->e_flags; | |
2223 | out_flags = elf_elfheader (obfd)->e_flags; | |
2224 | ||
2225 | if (!elf_flags_init (obfd)) | |
2226 | { | |
fe077fa6 NC |
2227 | /* If the input is the default architecture and had the default |
2228 | flags then do not bother setting the flags for the output | |
2229 | architecture, instead allow future merges to do this. If no | |
2230 | future merges ever set these flags then they will retain their | |
2231 | uninitialised values, which surprise surprise, correspond | |
252b5132 | 2232 | to the default values. */ |
fe077fa6 NC |
2233 | if (bfd_get_arch_info (ibfd)->the_default |
2234 | && elf_elfheader (ibfd)->e_flags == 0) | |
b34976b6 | 2235 | return TRUE; |
252b5132 | 2236 | |
b34976b6 | 2237 | elf_flags_init (obfd) = TRUE; |
252b5132 RH |
2238 | elf_elfheader (obfd)->e_flags = in_flags; |
2239 | ||
2240 | if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) | |
2241 | && bfd_get_arch_info (obfd)->the_default) | |
2242 | return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd)); | |
2243 | ||
b34976b6 | 2244 | return TRUE; |
252b5132 RH |
2245 | } |
2246 | ||
1006ba19 | 2247 | /* Identical flags must be compatible. */ |
252b5132 | 2248 | if (in_flags == out_flags) |
b34976b6 | 2249 | return TRUE; |
252b5132 | 2250 | |
cf919dfd PB |
2251 | /* Check to see if the input BFD actually contains any sections. |
2252 | If not, its flags may not have been initialised either, but it cannot | |
2253 | actually cause any incompatibility. */ | |
2254 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) | |
2255 | { | |
2256 | /* Ignore synthetic glue sections. */ | |
2257 | if (strcmp (sec->name, ".glue_7") | |
2258 | && strcmp (sec->name, ".glue_7t")) | |
2259 | { | |
b34976b6 | 2260 | null_input_bfd = FALSE; |
cf919dfd PB |
2261 | break; |
2262 | } | |
2263 | } | |
2264 | if (null_input_bfd) | |
b34976b6 | 2265 | return TRUE; |
cf919dfd | 2266 | |
252b5132 | 2267 | /* Complain about various flag mismatches. */ |
fc830a83 NC |
2268 | if (EF_ARM_EABI_VERSION (in_flags) != EF_ARM_EABI_VERSION (out_flags)) |
2269 | { | |
63b0f745 | 2270 | _bfd_error_handler (_("\ |
6c571f00 | 2271 | ERROR: %s is compiled for EABI version %d, whereas %s is compiled for version %d"), |
63b0f745 NC |
2272 | bfd_archive_filename (ibfd), |
2273 | (in_flags & EF_ARM_EABIMASK) >> 24, | |
06317a27 | 2274 | bfd_get_filename (obfd), |
63b0f745 | 2275 | (out_flags & EF_ARM_EABIMASK) >> 24); |
b34976b6 | 2276 | return FALSE; |
fc830a83 | 2277 | } |
252b5132 | 2278 | |
1006ba19 PB |
2279 | /* Not sure what needs to be checked for EABI versions >= 1. */ |
2280 | if (EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN) | |
2281 | { | |
fd2ec330 | 2282 | if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26)) |
1006ba19 | 2283 | { |
63b0f745 | 2284 | _bfd_error_handler (_("\ |
6c571f00 | 2285 | ERROR: %s is compiled for APCS-%d, whereas target %s uses APCS-%d"), |
63b0f745 NC |
2286 | bfd_archive_filename (ibfd), |
2287 | in_flags & EF_ARM_APCS_26 ? 26 : 32, | |
06317a27 | 2288 | bfd_get_filename (obfd), |
63b0f745 | 2289 | out_flags & EF_ARM_APCS_26 ? 26 : 32); |
b34976b6 | 2290 | flags_compatible = FALSE; |
1006ba19 | 2291 | } |
252b5132 | 2292 | |
fd2ec330 | 2293 | if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT)) |
1006ba19 | 2294 | { |
5eefb65f NC |
2295 | if (in_flags & EF_ARM_APCS_FLOAT) |
2296 | _bfd_error_handler (_("\ | |
6c571f00 | 2297 | ERROR: %s passes floats in float registers, whereas %s passes them in integer registers"), |
5eefb65f NC |
2298 | bfd_archive_filename (ibfd), |
2299 | bfd_get_filename (obfd)); | |
2300 | else | |
2301 | _bfd_error_handler (_("\ | |
6c571f00 | 2302 | ERROR: %s passes floats in integer registers, whereas %s passes them in float registers"), |
5eefb65f NC |
2303 | bfd_archive_filename (ibfd), |
2304 | bfd_get_filename (obfd)); | |
63b0f745 | 2305 | |
b34976b6 | 2306 | flags_compatible = FALSE; |
1006ba19 | 2307 | } |
252b5132 | 2308 | |
96a846ea | 2309 | if ((in_flags & EF_ARM_VFP_FLOAT) != (out_flags & EF_ARM_VFP_FLOAT)) |
1006ba19 | 2310 | { |
96a846ea RE |
2311 | if (in_flags & EF_ARM_VFP_FLOAT) |
2312 | _bfd_error_handler (_("\ | |
6c571f00 | 2313 | ERROR: %s uses VFP instructions, whereas %s uses FPA instructions"), |
5eefb65f NC |
2314 | bfd_archive_filename (ibfd), |
2315 | bfd_get_filename (obfd)); | |
2316 | else | |
96a846ea | 2317 | _bfd_error_handler (_("\ |
6c571f00 | 2318 | ERROR: %s uses FPA instructions, whereas %s uses VFP instructions"), |
5eefb65f NC |
2319 | bfd_archive_filename (ibfd), |
2320 | bfd_get_filename (obfd)); | |
63b0f745 | 2321 | |
b34976b6 | 2322 | flags_compatible = FALSE; |
1006ba19 | 2323 | } |
96a846ea RE |
2324 | |
2325 | #ifdef EF_ARM_SOFT_FLOAT | |
2326 | if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT)) | |
2327 | { | |
2328 | /* We can allow interworking between code that is VFP format | |
2329 | layout, and uses either soft float or integer regs for | |
2330 | passing floating point arguments and results. We already | |
2331 | know that the APCS_FLOAT flags match; similarly for VFP | |
2332 | flags. */ | |
2333 | if ((in_flags & EF_ARM_APCS_FLOAT) != 0 | |
2334 | || (in_flags & EF_ARM_VFP_FLOAT) == 0) | |
2335 | { | |
2336 | if (in_flags & EF_ARM_SOFT_FLOAT) | |
517662d4 | 2337 | _bfd_error_handler (_("\ |
6c571f00 | 2338 | ERROR: %s uses software FP, whereas %s uses hardware FP"), |
96a846ea RE |
2339 | bfd_archive_filename (ibfd), |
2340 | bfd_get_filename (obfd)); | |
2341 | else | |
517662d4 | 2342 | _bfd_error_handler (_("\ |
6c571f00 | 2343 | ERROR: %s uses hardware FP, whereas %s uses software FP"), |
96a846ea RE |
2344 | bfd_archive_filename (ibfd), |
2345 | bfd_get_filename (obfd)); | |
2346 | ||
b34976b6 | 2347 | flags_compatible = FALSE; |
96a846ea RE |
2348 | } |
2349 | } | |
ee43f35e | 2350 | #endif |
252b5132 | 2351 | |
1006ba19 | 2352 | /* Interworking mismatch is only a warning. */ |
fd2ec330 | 2353 | if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK)) |
8f615d07 | 2354 | { |
e3c8793a NC |
2355 | if (in_flags & EF_ARM_INTERWORK) |
2356 | { | |
2357 | _bfd_error_handler (_("\ | |
2358 | Warning: %s supports interworking, whereas %s does not"), | |
2359 | bfd_archive_filename (ibfd), | |
cedb70c5 | 2360 | bfd_get_filename (obfd)); |
e3c8793a NC |
2361 | } |
2362 | else | |
2363 | { | |
2364 | _bfd_error_handler (_("\ | |
2365 | Warning: %s does not support interworking, whereas %s does"), | |
2366 | bfd_archive_filename (ibfd), | |
2367 | bfd_get_filename (obfd)); | |
2368 | } | |
8f615d07 | 2369 | } |
252b5132 | 2370 | } |
63b0f745 | 2371 | |
1006ba19 | 2372 | return flags_compatible; |
252b5132 RH |
2373 | } |
2374 | ||
9b485d32 NC |
2375 | /* Display the flags field. */ |
2376 | ||
b34976b6 | 2377 | static bfd_boolean |
252b5132 RH |
2378 | elf32_arm_print_private_bfd_data (abfd, ptr) |
2379 | bfd *abfd; | |
2380 | PTR ptr; | |
2381 | { | |
fc830a83 NC |
2382 | FILE * file = (FILE *) ptr; |
2383 | unsigned long flags; | |
252b5132 RH |
2384 | |
2385 | BFD_ASSERT (abfd != NULL && ptr != NULL); | |
2386 | ||
2387 | /* Print normal ELF private data. */ | |
2388 | _bfd_elf_print_private_bfd_data (abfd, ptr); | |
2389 | ||
fc830a83 | 2390 | flags = elf_elfheader (abfd)->e_flags; |
9b485d32 NC |
2391 | /* Ignore init flag - it may not be set, despite the flags field |
2392 | containing valid data. */ | |
252b5132 RH |
2393 | |
2394 | /* xgettext:c-format */ | |
9b485d32 | 2395 | fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); |
252b5132 | 2396 | |
fc830a83 NC |
2397 | switch (EF_ARM_EABI_VERSION (flags)) |
2398 | { | |
2399 | case EF_ARM_EABI_UNKNOWN: | |
2400 | /* The following flag bits are GNU extenstions and not part of the | |
2401 | official ARM ELF extended ABI. Hence they are only decoded if | |
2402 | the EABI version is not set. */ | |
fd2ec330 | 2403 | if (flags & EF_ARM_INTERWORK) |
9b485d32 | 2404 | fprintf (file, _(" [interworking enabled]")); |
9a5aca8c | 2405 | |
fd2ec330 | 2406 | if (flags & EF_ARM_APCS_26) |
6c571f00 | 2407 | fprintf (file, " [APCS-26]"); |
fc830a83 | 2408 | else |
6c571f00 | 2409 | fprintf (file, " [APCS-32]"); |
9a5aca8c | 2410 | |
96a846ea RE |
2411 | if (flags & EF_ARM_VFP_FLOAT) |
2412 | fprintf (file, _(" [VFP float format]")); | |
2413 | else | |
2414 | fprintf (file, _(" [FPA float format]")); | |
2415 | ||
fd2ec330 | 2416 | if (flags & EF_ARM_APCS_FLOAT) |
9b485d32 | 2417 | fprintf (file, _(" [floats passed in float registers]")); |
9a5aca8c | 2418 | |
fd2ec330 | 2419 | if (flags & EF_ARM_PIC) |
9b485d32 | 2420 | fprintf (file, _(" [position independent]")); |
fc830a83 | 2421 | |
fd2ec330 | 2422 | if (flags & EF_ARM_NEW_ABI) |
9b485d32 | 2423 | fprintf (file, _(" [new ABI]")); |
9a5aca8c | 2424 | |
fd2ec330 | 2425 | if (flags & EF_ARM_OLD_ABI) |
9b485d32 | 2426 | fprintf (file, _(" [old ABI]")); |
9a5aca8c | 2427 | |
fd2ec330 | 2428 | if (flags & EF_ARM_SOFT_FLOAT) |
9b485d32 | 2429 | fprintf (file, _(" [software FP]")); |
9a5aca8c | 2430 | |
96a846ea RE |
2431 | flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT |
2432 | | EF_ARM_PIC | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI | |
2433 | | EF_ARM_SOFT_FLOAT | EF_ARM_VFP_FLOAT); | |
fc830a83 | 2434 | break; |
9a5aca8c | 2435 | |
fc830a83 | 2436 | case EF_ARM_EABI_VER1: |
9b485d32 | 2437 | fprintf (file, _(" [Version1 EABI]")); |
9a5aca8c | 2438 | |
fc830a83 | 2439 | if (flags & EF_ARM_SYMSARESORTED) |
9b485d32 | 2440 | fprintf (file, _(" [sorted symbol table]")); |
fc830a83 | 2441 | else |
9b485d32 | 2442 | fprintf (file, _(" [unsorted symbol table]")); |
9a5aca8c | 2443 | |
fc830a83 NC |
2444 | flags &= ~ EF_ARM_SYMSARESORTED; |
2445 | break; | |
9a5aca8c | 2446 | |
fd2ec330 PB |
2447 | case EF_ARM_EABI_VER2: |
2448 | fprintf (file, _(" [Version2 EABI]")); | |
2449 | ||
2450 | if (flags & EF_ARM_SYMSARESORTED) | |
2451 | fprintf (file, _(" [sorted symbol table]")); | |
2452 | else | |
2453 | fprintf (file, _(" [unsorted symbol table]")); | |
2454 | ||
2455 | if (flags & EF_ARM_DYNSYMSUSESEGIDX) | |
2456 | fprintf (file, _(" [dynamic symbols use segment index]")); | |
2457 | ||
2458 | if (flags & EF_ARM_MAPSYMSFIRST) | |
2459 | fprintf (file, _(" [mapping symbols precede others]")); | |
2460 | ||
99e4ae17 | 2461 | flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX |
fd2ec330 PB |
2462 | | EF_ARM_MAPSYMSFIRST); |
2463 | break; | |
2464 | ||
fc830a83 | 2465 | default: |
9b485d32 | 2466 | fprintf (file, _(" <EABI version unrecognised>")); |
fc830a83 NC |
2467 | break; |
2468 | } | |
252b5132 | 2469 | |
fc830a83 | 2470 | flags &= ~ EF_ARM_EABIMASK; |
252b5132 | 2471 | |
fc830a83 | 2472 | if (flags & EF_ARM_RELEXEC) |
9b485d32 | 2473 | fprintf (file, _(" [relocatable executable]")); |
252b5132 | 2474 | |
fc830a83 | 2475 | if (flags & EF_ARM_HASENTRY) |
9b485d32 | 2476 | fprintf (file, _(" [has entry point]")); |
252b5132 | 2477 | |
fc830a83 NC |
2478 | flags &= ~ (EF_ARM_RELEXEC | EF_ARM_HASENTRY); |
2479 | ||
2480 | if (flags) | |
9b485d32 | 2481 | fprintf (file, _("<Unrecognised flag bits set>")); |
9a5aca8c | 2482 | |
252b5132 RH |
2483 | fputc ('\n', file); |
2484 | ||
b34976b6 | 2485 | return TRUE; |
252b5132 RH |
2486 | } |
2487 | ||
2488 | static int | |
2489 | elf32_arm_get_symbol_type (elf_sym, type) | |
2490 | Elf_Internal_Sym * elf_sym; | |
2491 | int type; | |
2492 | { | |
2f0ca46a NC |
2493 | switch (ELF_ST_TYPE (elf_sym->st_info)) |
2494 | { | |
2495 | case STT_ARM_TFUNC: | |
2496 | return ELF_ST_TYPE (elf_sym->st_info); | |
ce855c42 | 2497 | |
2f0ca46a NC |
2498 | case STT_ARM_16BIT: |
2499 | /* If the symbol is not an object, return the STT_ARM_16BIT flag. | |
2500 | This allows us to distinguish between data used by Thumb instructions | |
2501 | and non-data (which is probably code) inside Thumb regions of an | |
2502 | executable. */ | |
2503 | if (type != STT_OBJECT) | |
2504 | return ELF_ST_TYPE (elf_sym->st_info); | |
2505 | break; | |
9a5aca8c | 2506 | |
ce855c42 NC |
2507 | default: |
2508 | break; | |
2f0ca46a NC |
2509 | } |
2510 | ||
2511 | return type; | |
252b5132 | 2512 | } |
f21f3fe0 | 2513 | |
252b5132 | 2514 | static asection * |
1e2f5b6e AM |
2515 | elf32_arm_gc_mark_hook (sec, info, rel, h, sym) |
2516 | asection *sec; | |
5f771d47 | 2517 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
252b5132 RH |
2518 | Elf_Internal_Rela *rel; |
2519 | struct elf_link_hash_entry *h; | |
2520 | Elf_Internal_Sym *sym; | |
2521 | { | |
2522 | if (h != NULL) | |
2523 | { | |
2524 | switch (ELF32_R_TYPE (rel->r_info)) | |
2525 | { | |
2526 | case R_ARM_GNU_VTINHERIT: | |
2527 | case R_ARM_GNU_VTENTRY: | |
2528 | break; | |
2529 | ||
2530 | default: | |
2531 | switch (h->root.type) | |
2532 | { | |
2533 | case bfd_link_hash_defined: | |
2534 | case bfd_link_hash_defweak: | |
2535 | return h->root.u.def.section; | |
2536 | ||
2537 | case bfd_link_hash_common: | |
2538 | return h->root.u.c.p->section; | |
e049a0de ILT |
2539 | |
2540 | default: | |
2541 | break; | |
252b5132 RH |
2542 | } |
2543 | } | |
2544 | } | |
2545 | else | |
1e2f5b6e | 2546 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
9ad5cbcf | 2547 | |
252b5132 RH |
2548 | return NULL; |
2549 | } | |
2550 | ||
780a67af NC |
2551 | /* Update the got entry reference counts for the section being removed. */ |
2552 | ||
b34976b6 | 2553 | static bfd_boolean |
252b5132 | 2554 | elf32_arm_gc_sweep_hook (abfd, info, sec, relocs) |
5f771d47 ILT |
2555 | bfd *abfd ATTRIBUTE_UNUSED; |
2556 | struct bfd_link_info *info ATTRIBUTE_UNUSED; | |
2557 | asection *sec ATTRIBUTE_UNUSED; | |
2558 | const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED; | |
252b5132 | 2559 | { |
780a67af | 2560 | /* We don't support garbage collection of GOT and PLT relocs yet. */ |
b34976b6 | 2561 | return TRUE; |
252b5132 RH |
2562 | } |
2563 | ||
780a67af NC |
2564 | /* Look through the relocs for a section during the first phase. */ |
2565 | ||
b34976b6 | 2566 | static bfd_boolean |
252b5132 | 2567 | elf32_arm_check_relocs (abfd, info, sec, relocs) |
b34976b6 AM |
2568 | bfd *abfd; |
2569 | struct bfd_link_info *info; | |
2570 | asection *sec; | |
2571 | const Elf_Internal_Rela *relocs; | |
252b5132 | 2572 | { |
b34976b6 AM |
2573 | Elf_Internal_Shdr *symtab_hdr; |
2574 | struct elf_link_hash_entry **sym_hashes; | |
2575 | struct elf_link_hash_entry **sym_hashes_end; | |
2576 | const Elf_Internal_Rela *rel; | |
2577 | const Elf_Internal_Rela *rel_end; | |
2578 | bfd *dynobj; | |
2579 | asection *sgot, *srelgot, *sreloc; | |
2580 | bfd_vma *local_got_offsets; | |
9a5aca8c | 2581 | |
252b5132 | 2582 | if (info->relocateable) |
b34976b6 | 2583 | return TRUE; |
9a5aca8c | 2584 | |
252b5132 | 2585 | sgot = srelgot = sreloc = NULL; |
9a5aca8c | 2586 | |
252b5132 RH |
2587 | dynobj = elf_hash_table (info)->dynobj; |
2588 | local_got_offsets = elf_local_got_offsets (abfd); | |
f21f3fe0 | 2589 | |
252b5132 RH |
2590 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
2591 | sym_hashes = elf_sym_hashes (abfd); | |
9b485d32 NC |
2592 | sym_hashes_end = sym_hashes |
2593 | + symtab_hdr->sh_size / sizeof (Elf32_External_Sym); | |
2594 | ||
252b5132 RH |
2595 | if (!elf_bad_symtab (abfd)) |
2596 | sym_hashes_end -= symtab_hdr->sh_info; | |
9b485d32 | 2597 | |
252b5132 RH |
2598 | rel_end = relocs + sec->reloc_count; |
2599 | for (rel = relocs; rel < rel_end; rel++) | |
2600 | { | |
2601 | struct elf_link_hash_entry *h; | |
2602 | unsigned long r_symndx; | |
9a5aca8c | 2603 | |
252b5132 RH |
2604 | r_symndx = ELF32_R_SYM (rel->r_info); |
2605 | if (r_symndx < symtab_hdr->sh_info) | |
2606 | h = NULL; | |
2607 | else | |
2608 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
9a5aca8c | 2609 | |
252b5132 RH |
2610 | /* Some relocs require a global offset table. */ |
2611 | if (dynobj == NULL) | |
2612 | { | |
2613 | switch (ELF32_R_TYPE (rel->r_info)) | |
2614 | { | |
2615 | case R_ARM_GOT32: | |
2616 | case R_ARM_GOTOFF: | |
2617 | case R_ARM_GOTPC: | |
2618 | elf_hash_table (info)->dynobj = dynobj = abfd; | |
2619 | if (! _bfd_elf_create_got_section (dynobj, info)) | |
b34976b6 | 2620 | return FALSE; |
252b5132 RH |
2621 | break; |
2622 | ||
2623 | default: | |
2624 | break; | |
2625 | } | |
2626 | } | |
2627 | ||
2628 | switch (ELF32_R_TYPE (rel->r_info)) | |
2629 | { | |
2630 | case R_ARM_GOT32: | |
2631 | /* This symbol requires a global offset table entry. */ | |
2632 | if (sgot == NULL) | |
2633 | { | |
2634 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
2635 | BFD_ASSERT (sgot != NULL); | |
2636 | } | |
2637 | ||
2638 | /* Get the got relocation section if necessary. */ | |
2639 | if (srelgot == NULL | |
2640 | && (h != NULL || info->shared)) | |
2641 | { | |
2642 | srelgot = bfd_get_section_by_name (dynobj, ".rel.got"); | |
9a5aca8c | 2643 | |
252b5132 RH |
2644 | /* If no got relocation section, make one and initialize. */ |
2645 | if (srelgot == NULL) | |
2646 | { | |
2647 | srelgot = bfd_make_section (dynobj, ".rel.got"); | |
2648 | if (srelgot == NULL | |
2649 | || ! bfd_set_section_flags (dynobj, srelgot, | |
99e4ae17 | 2650 | (SEC_ALLOC |
252b5132 RH |
2651 | | SEC_LOAD |
2652 | | SEC_HAS_CONTENTS | |
2653 | | SEC_IN_MEMORY | |
2654 | | SEC_LINKER_CREATED | |
2655 | | SEC_READONLY)) | |
2656 | || ! bfd_set_section_alignment (dynobj, srelgot, 2)) | |
b34976b6 | 2657 | return FALSE; |
252b5132 RH |
2658 | } |
2659 | } | |
2660 | ||
2661 | if (h != NULL) | |
2662 | { | |
2663 | if (h->got.offset != (bfd_vma) -1) | |
2664 | /* We have already allocated space in the .got. */ | |
2665 | break; | |
f21f3fe0 | 2666 | |
252b5132 RH |
2667 | h->got.offset = sgot->_raw_size; |
2668 | ||
2669 | /* Make sure this symbol is output as a dynamic symbol. */ | |
2670 | if (h->dynindx == -1) | |
2671 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) | |
b34976b6 | 2672 | return FALSE; |
252b5132 RH |
2673 | |
2674 | srelgot->_raw_size += sizeof (Elf32_External_Rel); | |
2675 | } | |
2676 | else | |
2677 | { | |
99e4ae17 | 2678 | /* This is a global offset table entry for a local |
252b5132 RH |
2679 | symbol. */ |
2680 | if (local_got_offsets == NULL) | |
2681 | { | |
dc810e39 | 2682 | bfd_size_type size; |
63b0f745 | 2683 | unsigned int i; |
252b5132 | 2684 | |
dc810e39 AM |
2685 | size = symtab_hdr->sh_info; |
2686 | size *= sizeof (bfd_vma); | |
252b5132 RH |
2687 | local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size); |
2688 | if (local_got_offsets == NULL) | |
b34976b6 | 2689 | return FALSE; |
252b5132 RH |
2690 | elf_local_got_offsets (abfd) = local_got_offsets; |
2691 | for (i = 0; i < symtab_hdr->sh_info; i++) | |
2692 | local_got_offsets[i] = (bfd_vma) -1; | |
2693 | } | |
f21f3fe0 | 2694 | |
252b5132 RH |
2695 | if (local_got_offsets[r_symndx] != (bfd_vma) -1) |
2696 | /* We have already allocated space in the .got. */ | |
2697 | break; | |
2698 | ||
2699 | local_got_offsets[r_symndx] = sgot->_raw_size; | |
2700 | ||
2701 | if (info->shared) | |
2702 | /* If we are generating a shared object, we need to | |
2703 | output a R_ARM_RELATIVE reloc so that the dynamic | |
2704 | linker can adjust this GOT entry. */ | |
2705 | srelgot->_raw_size += sizeof (Elf32_External_Rel); | |
2706 | } | |
2707 | ||
2708 | sgot->_raw_size += 4; | |
2709 | break; | |
2710 | ||
99e4ae17 | 2711 | case R_ARM_PLT32: |
252b5132 RH |
2712 | /* This symbol requires a procedure linkage table entry. We |
2713 | actually build the entry in adjust_dynamic_symbol, | |
2714 | because this might be a case of linking PIC code which is | |
2715 | never referenced by a dynamic object, in which case we | |
2716 | don't need to generate a procedure linkage table entry | |
2717 | after all. */ | |
2718 | ||
2719 | /* If this is a local symbol, we resolve it directly without | |
2720 | creating a procedure linkage table entry. */ | |
2721 | if (h == NULL) | |
2722 | continue; | |
2723 | ||
2724 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; | |
2725 | break; | |
2726 | ||
2727 | case R_ARM_ABS32: | |
2728 | case R_ARM_REL32: | |
2729 | case R_ARM_PC24: | |
2730 | /* If we are creating a shared library, and this is a reloc | |
2731 | against a global symbol, or a non PC relative reloc | |
2732 | against a local symbol, then we need to copy the reloc | |
2733 | into the shared library. However, if we are linking with | |
2734 | -Bsymbolic, we do not need to copy a reloc against a | |
2735 | global symbol which is defined in an object we are | |
2736 | including in the link (i.e., DEF_REGULAR is set). At | |
2737 | this point we have not seen all the input files, so it is | |
2738 | possible that DEF_REGULAR is not set now but will be set | |
2739 | later (it is never cleared). We account for that | |
2740 | possibility below by storing information in the | |
2741 | pcrel_relocs_copied field of the hash table entry. */ | |
2742 | if (info->shared | |
2743 | && (ELF32_R_TYPE (rel->r_info) != R_ARM_PC24 | |
2744 | || (h != NULL | |
2745 | && (! info->symbolic | |
2746 | || (h->elf_link_hash_flags | |
2747 | & ELF_LINK_HASH_DEF_REGULAR) == 0)))) | |
2748 | { | |
2749 | /* When creating a shared object, we must copy these | |
2750 | reloc types into the output file. We create a reloc | |
2751 | section in dynobj and make room for this reloc. */ | |
2752 | if (sreloc == NULL) | |
2753 | { | |
2754 | const char * name; | |
2755 | ||
2756 | name = (bfd_elf_string_from_elf_section | |
2757 | (abfd, | |
2758 | elf_elfheader (abfd)->e_shstrndx, | |
2759 | elf_section_data (sec)->rel_hdr.sh_name)); | |
2760 | if (name == NULL) | |
b34976b6 | 2761 | return FALSE; |
252b5132 RH |
2762 | |
2763 | BFD_ASSERT (strncmp (name, ".rel", 4) == 0 | |
99e4ae17 | 2764 | && strcmp (bfd_get_section_name (abfd, sec), |
252b5132 RH |
2765 | name + 4) == 0); |
2766 | ||
2767 | sreloc = bfd_get_section_by_name (dynobj, name); | |
2768 | if (sreloc == NULL) | |
2769 | { | |
2770 | flagword flags; | |
2771 | ||
2772 | sreloc = bfd_make_section (dynobj, name); | |
2773 | flags = (SEC_HAS_CONTENTS | SEC_READONLY | |
2774 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
2775 | if ((sec->flags & SEC_ALLOC) != 0) | |
2776 | flags |= SEC_ALLOC | SEC_LOAD; | |
2777 | if (sreloc == NULL | |
2778 | || ! bfd_set_section_flags (dynobj, sreloc, flags) | |
2779 | || ! bfd_set_section_alignment (dynobj, sreloc, 2)) | |
b34976b6 | 2780 | return FALSE; |
252b5132 | 2781 | } |
99e4ae17 AJ |
2782 | if (sec->flags & SEC_READONLY) |
2783 | info->flags |= DF_TEXTREL; | |
252b5132 RH |
2784 | } |
2785 | ||
2786 | sreloc->_raw_size += sizeof (Elf32_External_Rel); | |
2787 | /* If we are linking with -Bsymbolic, and this is a | |
2788 | global symbol, we count the number of PC relative | |
2789 | relocations we have entered for this symbol, so that | |
2790 | we can discard them again if the symbol is later | |
2791 | defined by a regular object. Note that this function | |
2792 | is only called if we are using an elf_i386 linker | |
2793 | hash table, which means that h is really a pointer to | |
2794 | an elf_i386_link_hash_entry. */ | |
2795 | if (h != NULL && info->symbolic | |
2796 | && ELF32_R_TYPE (rel->r_info) == R_ARM_PC24) | |
2797 | { | |
2798 | struct elf32_arm_link_hash_entry * eh; | |
2799 | struct elf32_arm_pcrel_relocs_copied * p; | |
2800 | ||
2801 | eh = (struct elf32_arm_link_hash_entry *) h; | |
2802 | ||
2803 | for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next) | |
2804 | if (p->section == sreloc) | |
2805 | break; | |
2806 | ||
2807 | if (p == NULL) | |
2808 | { | |
2809 | p = ((struct elf32_arm_pcrel_relocs_copied *) | |
dc810e39 | 2810 | bfd_alloc (dynobj, (bfd_size_type) sizeof * p)); |
252b5132 | 2811 | if (p == NULL) |
b34976b6 | 2812 | return FALSE; |
252b5132 RH |
2813 | p->next = eh->pcrel_relocs_copied; |
2814 | eh->pcrel_relocs_copied = p; | |
2815 | p->section = sreloc; | |
2816 | p->count = 0; | |
2817 | } | |
2818 | ||
2819 | ++p->count; | |
2820 | } | |
2821 | } | |
2822 | break; | |
2823 | ||
2824 | /* This relocation describes the C++ object vtable hierarchy. | |
2825 | Reconstruct it for later use during GC. */ | |
2826 | case R_ARM_GNU_VTINHERIT: | |
2827 | if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
b34976b6 | 2828 | return FALSE; |
252b5132 | 2829 | break; |
9a5aca8c | 2830 | |
252b5132 RH |
2831 | /* This relocation describes which C++ vtable entries are actually |
2832 | used. Record for later use during GC. */ | |
2833 | case R_ARM_GNU_VTENTRY: | |
d512aa07 | 2834 | if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_offset)) |
b34976b6 | 2835 | return FALSE; |
252b5132 RH |
2836 | break; |
2837 | } | |
2838 | } | |
f21f3fe0 | 2839 | |
b34976b6 | 2840 | return TRUE; |
252b5132 RH |
2841 | } |
2842 | ||
252b5132 RH |
2843 | /* Find the nearest line to a particular section and offset, for error |
2844 | reporting. This code is a duplicate of the code in elf.c, except | |
9b485d32 | 2845 | that it also accepts STT_ARM_TFUNC as a symbol that names a function. */ |
252b5132 | 2846 | |
b34976b6 | 2847 | static bfd_boolean |
252b5132 RH |
2848 | elf32_arm_find_nearest_line |
2849 | (abfd, section, symbols, offset, filename_ptr, functionname_ptr, line_ptr) | |
b34976b6 AM |
2850 | bfd *abfd; |
2851 | asection *section; | |
2852 | asymbol **symbols; | |
2853 | bfd_vma offset; | |
2854 | const char **filename_ptr; | |
2855 | const char **functionname_ptr; | |
2856 | unsigned int *line_ptr; | |
252b5132 | 2857 | { |
b34976b6 AM |
2858 | bfd_boolean found; |
2859 | const char *filename; | |
2860 | asymbol *func; | |
2861 | bfd_vma low_func; | |
2862 | asymbol **p; | |
252b5132 RH |
2863 | |
2864 | if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset, | |
f21f3fe0 | 2865 | filename_ptr, functionname_ptr, |
857ec808 NC |
2866 | line_ptr, 0, |
2867 | &elf_tdata (abfd)->dwarf2_find_line_info)) | |
b34976b6 | 2868 | return TRUE; |
252b5132 RH |
2869 | |
2870 | if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset, | |
2871 | &found, filename_ptr, | |
2872 | functionname_ptr, line_ptr, | |
2873 | &elf_tdata (abfd)->line_info)) | |
b34976b6 | 2874 | return FALSE; |
f21f3fe0 | 2875 | |
252b5132 | 2876 | if (found) |
b34976b6 | 2877 | return TRUE; |
252b5132 RH |
2878 | |
2879 | if (symbols == NULL) | |
b34976b6 | 2880 | return FALSE; |
252b5132 RH |
2881 | |
2882 | filename = NULL; | |
2883 | func = NULL; | |
2884 | low_func = 0; | |
2885 | ||
2886 | for (p = symbols; *p != NULL; p++) | |
2887 | { | |
2888 | elf_symbol_type *q; | |
2889 | ||
2890 | q = (elf_symbol_type *) *p; | |
2891 | ||
2892 | if (bfd_get_section (&q->symbol) != section) | |
2893 | continue; | |
2894 | ||
2895 | switch (ELF_ST_TYPE (q->internal_elf_sym.st_info)) | |
2896 | { | |
2897 | default: | |
2898 | break; | |
2899 | case STT_FILE: | |
2900 | filename = bfd_asymbol_name (&q->symbol); | |
2901 | break; | |
2902 | case STT_NOTYPE: | |
2903 | case STT_FUNC: | |
2904 | case STT_ARM_TFUNC: | |
2905 | if (q->symbol.section == section | |
2906 | && q->symbol.value >= low_func | |
2907 | && q->symbol.value <= offset) | |
2908 | { | |
2909 | func = (asymbol *) q; | |
2910 | low_func = q->symbol.value; | |
2911 | } | |
2912 | break; | |
2913 | } | |
2914 | } | |
2915 | ||
2916 | if (func == NULL) | |
b34976b6 | 2917 | return FALSE; |
252b5132 RH |
2918 | |
2919 | *filename_ptr = filename; | |
2920 | *functionname_ptr = bfd_asymbol_name (func); | |
2921 | *line_ptr = 0; | |
f21f3fe0 | 2922 | |
b34976b6 | 2923 | return TRUE; |
252b5132 RH |
2924 | } |
2925 | ||
2926 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
2927 | regular object. The current definition is in some section of the | |
2928 | dynamic object, but we're not including those sections. We have to | |
2929 | change the definition to something the rest of the link can | |
2930 | understand. */ | |
2931 | ||
b34976b6 | 2932 | static bfd_boolean |
252b5132 RH |
2933 | elf32_arm_adjust_dynamic_symbol (info, h) |
2934 | struct bfd_link_info * info; | |
2935 | struct elf_link_hash_entry * h; | |
2936 | { | |
2937 | bfd * dynobj; | |
2938 | asection * s; | |
2939 | unsigned int power_of_two; | |
2940 | ||
2941 | dynobj = elf_hash_table (info)->dynobj; | |
2942 | ||
2943 | /* Make sure we know what is going on here. */ | |
2944 | BFD_ASSERT (dynobj != NULL | |
2945 | && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) | |
2946 | || h->weakdef != NULL | |
2947 | || ((h->elf_link_hash_flags | |
2948 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
2949 | && (h->elf_link_hash_flags | |
2950 | & ELF_LINK_HASH_REF_REGULAR) != 0 | |
2951 | && (h->elf_link_hash_flags | |
2952 | & ELF_LINK_HASH_DEF_REGULAR) == 0))); | |
2953 | ||
2954 | /* If this is a function, put it in the procedure linkage table. We | |
2955 | will fill in the contents of the procedure linkage table later, | |
2956 | when we know the address of the .got section. */ | |
24a1ba0f | 2957 | if (h->type == STT_FUNC |
252b5132 RH |
2958 | || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) |
2959 | { | |
9d7404b7 NC |
2960 | /* If we link a program (not a DSO), we'll get rid of unnecessary |
2961 | PLT entries; we point to the actual symbols -- even for pic | |
2962 | relocs, because a program built with -fpic should have the same | |
2963 | result as one built without -fpic, specifically considering weak | |
2964 | symbols. | |
2965 | FIXME: m68k and i386 differ here, for unclear reasons. */ | |
252b5132 | 2966 | if (! info->shared |
9d7404b7 | 2967 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0) |
252b5132 RH |
2968 | { |
2969 | /* This case can occur if we saw a PLT32 reloc in an input | |
9d7404b7 NC |
2970 | file, but the symbol was not defined by a dynamic object. |
2971 | In such a case, we don't actually need to build a | |
2972 | procedure linkage table, and we can just do a PC32 reloc | |
2973 | instead. */ | |
252b5132 | 2974 | BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0); |
9d7404b7 | 2975 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; |
b34976b6 | 2976 | return TRUE; |
252b5132 RH |
2977 | } |
2978 | ||
2979 | /* Make sure this symbol is output as a dynamic symbol. */ | |
2980 | if (h->dynindx == -1) | |
2981 | { | |
2982 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) | |
b34976b6 | 2983 | return FALSE; |
252b5132 RH |
2984 | } |
2985 | ||
24a1ba0f | 2986 | s = bfd_get_section_by_name (dynobj, ".plt"); |
252b5132 RH |
2987 | BFD_ASSERT (s != NULL); |
2988 | ||
24a1ba0f | 2989 | /* If this is the first .plt entry, make room for the special |
252b5132 RH |
2990 | first entry. */ |
2991 | if (s->_raw_size == 0) | |
24a1ba0f | 2992 | s->_raw_size += PLT_ENTRY_SIZE; |
252b5132 RH |
2993 | |
2994 | /* If this symbol is not defined in a regular file, and we are | |
2995 | not generating a shared library, then set the symbol to this | |
2996 | location in the .plt. This is required to make function | |
2997 | pointers compare as equal between the normal executable and | |
2998 | the shared library. */ | |
2999 | if (! info->shared | |
3000 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
3001 | { | |
3002 | h->root.u.def.section = s; | |
3003 | h->root.u.def.value = s->_raw_size; | |
3004 | } | |
3005 | ||
3006 | h->plt.offset = s->_raw_size; | |
3007 | ||
3008 | /* Make room for this entry. */ | |
24a1ba0f | 3009 | s->_raw_size += PLT_ENTRY_SIZE; |
252b5132 RH |
3010 | |
3011 | /* We also need to make an entry in the .got.plt section, which | |
3012 | will be placed in the .got section by the linker script. */ | |
252b5132 RH |
3013 | s = bfd_get_section_by_name (dynobj, ".got.plt"); |
3014 | BFD_ASSERT (s != NULL); | |
3015 | s->_raw_size += 4; | |
3016 | ||
3017 | /* We also need to make an entry in the .rel.plt section. */ | |
3018 | ||
3019 | s = bfd_get_section_by_name (dynobj, ".rel.plt"); | |
3020 | BFD_ASSERT (s != NULL); | |
3021 | s->_raw_size += sizeof (Elf32_External_Rel); | |
3022 | ||
b34976b6 | 3023 | return TRUE; |
252b5132 RH |
3024 | } |
3025 | ||
3026 | /* If this is a weak symbol, and there is a real definition, the | |
3027 | processor independent code will have arranged for us to see the | |
3028 | real definition first, and we can just use the same value. */ | |
3029 | if (h->weakdef != NULL) | |
3030 | { | |
3031 | BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined | |
3032 | || h->weakdef->root.type == bfd_link_hash_defweak); | |
3033 | h->root.u.def.section = h->weakdef->root.u.def.section; | |
3034 | h->root.u.def.value = h->weakdef->root.u.def.value; | |
b34976b6 | 3035 | return TRUE; |
252b5132 RH |
3036 | } |
3037 | ||
3038 | /* This is a reference to a symbol defined by a dynamic object which | |
3039 | is not a function. */ | |
3040 | ||
3041 | /* If we are creating a shared library, we must presume that the | |
3042 | only references to the symbol are via the global offset table. | |
3043 | For such cases we need not do anything here; the relocations will | |
3044 | be handled correctly by relocate_section. */ | |
3045 | if (info->shared) | |
b34976b6 | 3046 | return TRUE; |
252b5132 RH |
3047 | |
3048 | /* We must allocate the symbol in our .dynbss section, which will | |
3049 | become part of the .bss section of the executable. There will be | |
3050 | an entry for this symbol in the .dynsym section. The dynamic | |
3051 | object will contain position independent code, so all references | |
3052 | from the dynamic object to this symbol will go through the global | |
3053 | offset table. The dynamic linker will use the .dynsym entry to | |
3054 | determine the address it must put in the global offset table, so | |
3055 | both the dynamic object and the regular object will refer to the | |
3056 | same memory location for the variable. */ | |
252b5132 RH |
3057 | s = bfd_get_section_by_name (dynobj, ".dynbss"); |
3058 | BFD_ASSERT (s != NULL); | |
3059 | ||
3060 | /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to | |
3061 | copy the initial value out of the dynamic object and into the | |
3062 | runtime process image. We need to remember the offset into the | |
3063 | .rel.bss section we are going to use. */ | |
3064 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) | |
3065 | { | |
3066 | asection *srel; | |
3067 | ||
3068 | srel = bfd_get_section_by_name (dynobj, ".rel.bss"); | |
3069 | BFD_ASSERT (srel != NULL); | |
3070 | srel->_raw_size += sizeof (Elf32_External_Rel); | |
3071 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; | |
3072 | } | |
3073 | ||
3074 | /* We need to figure out the alignment required for this symbol. I | |
3075 | have no idea how ELF linkers handle this. */ | |
3076 | power_of_two = bfd_log2 (h->size); | |
3077 | if (power_of_two > 3) | |
3078 | power_of_two = 3; | |
3079 | ||
3080 | /* Apply the required alignment. */ | |
3081 | s->_raw_size = BFD_ALIGN (s->_raw_size, | |
3082 | (bfd_size_type) (1 << power_of_two)); | |
3083 | if (power_of_two > bfd_get_section_alignment (dynobj, s)) | |
3084 | { | |
3085 | if (! bfd_set_section_alignment (dynobj, s, power_of_two)) | |
b34976b6 | 3086 | return FALSE; |
252b5132 RH |
3087 | } |
3088 | ||
3089 | /* Define the symbol as being at this point in the section. */ | |
3090 | h->root.u.def.section = s; | |
3091 | h->root.u.def.value = s->_raw_size; | |
3092 | ||
3093 | /* Increment the section size to make room for the symbol. */ | |
3094 | s->_raw_size += h->size; | |
3095 | ||
b34976b6 | 3096 | return TRUE; |
252b5132 RH |
3097 | } |
3098 | ||
3099 | /* Set the sizes of the dynamic sections. */ | |
3100 | ||
b34976b6 | 3101 | static bfd_boolean |
252b5132 | 3102 | elf32_arm_size_dynamic_sections (output_bfd, info) |
99e4ae17 | 3103 | bfd * output_bfd ATTRIBUTE_UNUSED; |
252b5132 RH |
3104 | struct bfd_link_info * info; |
3105 | { | |
3106 | bfd * dynobj; | |
3107 | asection * s; | |
b34976b6 AM |
3108 | bfd_boolean plt; |
3109 | bfd_boolean relocs; | |
252b5132 RH |
3110 | |
3111 | dynobj = elf_hash_table (info)->dynobj; | |
3112 | BFD_ASSERT (dynobj != NULL); | |
3113 | ||
3114 | if (elf_hash_table (info)->dynamic_sections_created) | |
3115 | { | |
3116 | /* Set the contents of the .interp section to the interpreter. */ | |
3117 | if (! info->shared) | |
3118 | { | |
3119 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
3120 | BFD_ASSERT (s != NULL); | |
3121 | s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; | |
3122 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
3123 | } | |
3124 | } | |
3125 | else | |
3126 | { | |
3127 | /* We may have created entries in the .rel.got section. | |
3128 | However, if we are not creating the dynamic sections, we will | |
3129 | not actually use these entries. Reset the size of .rel.got, | |
3130 | which will cause it to get stripped from the output file | |
3131 | below. */ | |
3132 | s = bfd_get_section_by_name (dynobj, ".rel.got"); | |
3133 | if (s != NULL) | |
3134 | s->_raw_size = 0; | |
3135 | } | |
3136 | ||
3137 | /* If this is a -Bsymbolic shared link, then we need to discard all | |
3138 | PC relative relocs against symbols defined in a regular object. | |
3139 | We allocated space for them in the check_relocs routine, but we | |
3140 | will not fill them in in the relocate_section routine. */ | |
3141 | if (info->shared && info->symbolic) | |
3142 | elf32_arm_link_hash_traverse (elf32_arm_hash_table (info), | |
3143 | elf32_arm_discard_copies, | |
3144 | (PTR) NULL); | |
3145 | ||
3146 | /* The check_relocs and adjust_dynamic_symbol entry points have | |
3147 | determined the sizes of the various dynamic sections. Allocate | |
3148 | memory for them. */ | |
b34976b6 AM |
3149 | plt = FALSE; |
3150 | relocs = FALSE; | |
252b5132 RH |
3151 | for (s = dynobj->sections; s != NULL; s = s->next) |
3152 | { | |
3153 | const char * name; | |
b34976b6 | 3154 | bfd_boolean strip; |
252b5132 RH |
3155 | |
3156 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
3157 | continue; | |
3158 | ||
3159 | /* It's OK to base decisions on the section name, because none | |
3160 | of the dynobj section names depend upon the input files. */ | |
3161 | name = bfd_get_section_name (dynobj, s); | |
3162 | ||
b34976b6 | 3163 | strip = FALSE; |
252b5132 | 3164 | |
24a1ba0f | 3165 | if (strcmp (name, ".plt") == 0) |
252b5132 RH |
3166 | { |
3167 | if (s->_raw_size == 0) | |
3168 | { | |
3169 | /* Strip this section if we don't need it; see the | |
3170 | comment below. */ | |
b34976b6 | 3171 | strip = TRUE; |
252b5132 RH |
3172 | } |
3173 | else | |
3174 | { | |
3175 | /* Remember whether there is a PLT. */ | |
b34976b6 | 3176 | plt = TRUE; |
252b5132 RH |
3177 | } |
3178 | } | |
3179 | else if (strncmp (name, ".rel", 4) == 0) | |
3180 | { | |
3181 | if (s->_raw_size == 0) | |
3182 | { | |
3183 | /* If we don't need this section, strip it from the | |
3184 | output file. This is mostly to handle .rel.bss and | |
3185 | .rel.plt. We must create both sections in | |
3186 | create_dynamic_sections, because they must be created | |
3187 | before the linker maps input sections to output | |
3188 | sections. The linker does that before | |
3189 | adjust_dynamic_symbol is called, and it is that | |
3190 | function which decides whether anything needs to go | |
3191 | into these sections. */ | |
b34976b6 | 3192 | strip = TRUE; |
252b5132 RH |
3193 | } |
3194 | else | |
3195 | { | |
252b5132 RH |
3196 | /* Remember whether there are any reloc sections other |
3197 | than .rel.plt. */ | |
3198 | if (strcmp (name, ".rel.plt") != 0) | |
b34976b6 | 3199 | relocs = TRUE; |
252b5132 RH |
3200 | |
3201 | /* We use the reloc_count field as a counter if we need | |
3202 | to copy relocs into the output file. */ | |
3203 | s->reloc_count = 0; | |
3204 | } | |
3205 | } | |
3206 | else if (strncmp (name, ".got", 4) != 0) | |
3207 | { | |
3208 | /* It's not one of our sections, so don't allocate space. */ | |
3209 | continue; | |
3210 | } | |
3211 | ||
3212 | if (strip) | |
3213 | { | |
52585bb8 | 3214 | _bfd_strip_section_from_output (info, s); |
252b5132 RH |
3215 | continue; |
3216 | } | |
3217 | ||
3218 | /* Allocate memory for the section contents. */ | |
3219 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); | |
3220 | if (s->contents == NULL && s->_raw_size != 0) | |
b34976b6 | 3221 | return FALSE; |
252b5132 RH |
3222 | } |
3223 | ||
3224 | if (elf_hash_table (info)->dynamic_sections_created) | |
3225 | { | |
3226 | /* Add some entries to the .dynamic section. We fill in the | |
3227 | values later, in elf32_arm_finish_dynamic_sections, but we | |
3228 | must add the entries now so that we get the correct size for | |
3229 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
3230 | dynamic linker and used by the debugger. */ | |
dc810e39 AM |
3231 | #define add_dynamic_entry(TAG, VAL) \ |
3232 | bfd_elf32_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL)) | |
3233 | ||
3234 | if (!info->shared) | |
252b5132 | 3235 | { |
dc810e39 | 3236 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 3237 | return FALSE; |
252b5132 RH |
3238 | } |
3239 | ||
3240 | if (plt) | |
3241 | { | |
dc810e39 AM |
3242 | if ( !add_dynamic_entry (DT_PLTGOT, 0) |
3243 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
3244 | || !add_dynamic_entry (DT_PLTREL, DT_REL) | |
3245 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
b34976b6 | 3246 | return FALSE; |
252b5132 RH |
3247 | } |
3248 | ||
3249 | if (relocs) | |
3250 | { | |
dc810e39 AM |
3251 | if ( !add_dynamic_entry (DT_REL, 0) |
3252 | || !add_dynamic_entry (DT_RELSZ, 0) | |
3253 | || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel))) | |
b34976b6 | 3254 | return FALSE; |
252b5132 RH |
3255 | } |
3256 | ||
99e4ae17 | 3257 | if ((info->flags & DF_TEXTREL) != 0) |
252b5132 | 3258 | { |
dc810e39 | 3259 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
b34976b6 | 3260 | return FALSE; |
d6cf2879 | 3261 | info->flags |= DF_TEXTREL; |
252b5132 RH |
3262 | } |
3263 | } | |
dc810e39 | 3264 | #undef add_synamic_entry |
252b5132 | 3265 | |
b34976b6 | 3266 | return TRUE; |
252b5132 RH |
3267 | } |
3268 | ||
3269 | /* This function is called via elf32_arm_link_hash_traverse if we are | |
3270 | creating a shared object with -Bsymbolic. It discards the space | |
3271 | allocated to copy PC relative relocs against symbols which are | |
3272 | defined in regular objects. We allocated space for them in the | |
3273 | check_relocs routine, but we won't fill them in in the | |
3274 | relocate_section routine. */ | |
3275 | ||
b34976b6 | 3276 | static bfd_boolean |
252b5132 RH |
3277 | elf32_arm_discard_copies (h, ignore) |
3278 | struct elf32_arm_link_hash_entry * h; | |
5f771d47 | 3279 | PTR ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
3280 | { |
3281 | struct elf32_arm_pcrel_relocs_copied * s; | |
3282 | ||
e92d460e AM |
3283 | if (h->root.root.type == bfd_link_hash_warning) |
3284 | h = (struct elf32_arm_link_hash_entry *) h->root.root.u.i.link; | |
3285 | ||
252b5132 RH |
3286 | /* We only discard relocs for symbols defined in a regular object. */ |
3287 | if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
b34976b6 | 3288 | return TRUE; |
252b5132 RH |
3289 | |
3290 | for (s = h->pcrel_relocs_copied; s != NULL; s = s->next) | |
3291 | s->section->_raw_size -= s->count * sizeof (Elf32_External_Rel); | |
3292 | ||
b34976b6 | 3293 | return TRUE; |
252b5132 RH |
3294 | } |
3295 | ||
3296 | /* Finish up dynamic symbol handling. We set the contents of various | |
3297 | dynamic sections here. */ | |
3298 | ||
b34976b6 | 3299 | static bfd_boolean |
252b5132 RH |
3300 | elf32_arm_finish_dynamic_symbol (output_bfd, info, h, sym) |
3301 | bfd * output_bfd; | |
3302 | struct bfd_link_info * info; | |
3303 | struct elf_link_hash_entry * h; | |
3304 | Elf_Internal_Sym * sym; | |
3305 | { | |
3306 | bfd * dynobj; | |
3307 | ||
3308 | dynobj = elf_hash_table (info)->dynobj; | |
3309 | ||
3310 | if (h->plt.offset != (bfd_vma) -1) | |
3311 | { | |
3312 | asection * splt; | |
3313 | asection * sgot; | |
3314 | asection * srel; | |
24a1ba0f NC |
3315 | bfd_vma plt_index; |
3316 | bfd_vma got_offset; | |
947216bf AM |
3317 | Elf_Internal_Rela rel; |
3318 | bfd_byte *loc; | |
252b5132 RH |
3319 | |
3320 | /* This symbol has an entry in the procedure linkage table. Set | |
3321 | it up. */ | |
3322 | ||
3323 | BFD_ASSERT (h->dynindx != -1); | |
3324 | ||
3325 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
3326 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); | |
3327 | srel = bfd_get_section_by_name (dynobj, ".rel.plt"); | |
24a1ba0f | 3328 | BFD_ASSERT (splt != NULL && sgot != NULL && srel != NULL); |
252b5132 | 3329 | |
24a1ba0f NC |
3330 | /* Get the index in the procedure linkage table which |
3331 | corresponds to this symbol. This is the index of this symbol | |
3332 | in all the symbols for which we are making plt entries. The | |
3333 | first entry in the procedure linkage table is reserved. */ | |
3334 | plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; | |
252b5132 | 3335 | |
24a1ba0f NC |
3336 | /* Get the offset into the .got table of the entry that |
3337 | corresponds to this function. Each .got entry is 4 bytes. | |
3338 | The first three are reserved. */ | |
3339 | got_offset = (plt_index + 3) * 4; | |
252b5132 RH |
3340 | |
3341 | /* Fill in the entry in the procedure linkage table. */ | |
24a1ba0f NC |
3342 | bfd_put_32 (output_bfd, elf32_arm_plt_entry[0], |
3343 | splt->contents + h->plt.offset + 0); | |
3344 | bfd_put_32 (output_bfd, elf32_arm_plt_entry[1], | |
3345 | splt->contents + h->plt.offset + 4); | |
3346 | bfd_put_32 (output_bfd, elf32_arm_plt_entry[2], | |
3347 | splt->contents + h->plt.offset + 8); | |
3348 | bfd_put_32 (output_bfd, | |
252b5132 RH |
3349 | (sgot->output_section->vma |
3350 | + sgot->output_offset | |
24a1ba0f | 3351 | + got_offset |
252b5132 RH |
3352 | - splt->output_section->vma |
3353 | - splt->output_offset | |
3354 | - h->plt.offset - 12), | |
3355 | splt->contents + h->plt.offset + 12); | |
3356 | ||
24a1ba0f NC |
3357 | /* Fill in the entry in the global offset table. */ |
3358 | bfd_put_32 (output_bfd, | |
3359 | (splt->output_section->vma | |
3360 | + splt->output_offset), | |
3361 | sgot->contents + got_offset); | |
252b5132 RH |
3362 | |
3363 | /* Fill in the entry in the .rel.plt section. */ | |
3364 | rel.r_offset = (sgot->output_section->vma | |
3365 | + sgot->output_offset | |
24a1ba0f | 3366 | + got_offset); |
252b5132 | 3367 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT); |
947216bf AM |
3368 | loc = srel->contents + plt_index * sizeof (Elf32_External_Rel); |
3369 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); | |
252b5132 RH |
3370 | |
3371 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
3372 | { | |
3373 | /* Mark the symbol as undefined, rather than as defined in | |
3374 | the .plt section. Leave the value alone. */ | |
3375 | sym->st_shndx = SHN_UNDEF; | |
d982ba73 PB |
3376 | /* If the symbol is weak, we do need to clear the value. |
3377 | Otherwise, the PLT entry would provide a definition for | |
3378 | the symbol even if the symbol wasn't defined anywhere, | |
3379 | and so the symbol would never be NULL. */ | |
3380 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR_NONWEAK) | |
3381 | == 0) | |
3382 | sym->st_value = 0; | |
252b5132 RH |
3383 | } |
3384 | } | |
3385 | ||
3386 | if (h->got.offset != (bfd_vma) -1) | |
3387 | { | |
3388 | asection * sgot; | |
3389 | asection * srel; | |
947216bf AM |
3390 | Elf_Internal_Rela rel; |
3391 | bfd_byte *loc; | |
252b5132 RH |
3392 | |
3393 | /* This symbol has an entry in the global offset table. Set it | |
3394 | up. */ | |
252b5132 RH |
3395 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
3396 | srel = bfd_get_section_by_name (dynobj, ".rel.got"); | |
3397 | BFD_ASSERT (sgot != NULL && srel != NULL); | |
3398 | ||
3399 | rel.r_offset = (sgot->output_section->vma | |
3400 | + sgot->output_offset | |
dc810e39 | 3401 | + (h->got.offset &~ (bfd_vma) 1)); |
252b5132 RH |
3402 | |
3403 | /* If this is a -Bsymbolic link, and the symbol is defined | |
3404 | locally, we just want to emit a RELATIVE reloc. The entry in | |
3405 | the global offset table will already have been initialized in | |
3406 | the relocate_section function. */ | |
3407 | if (info->shared | |
3408 | && (info->symbolic || h->dynindx == -1) | |
3409 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) | |
3410 | rel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE); | |
3411 | else | |
3412 | { | |
3413 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset); | |
3414 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT); | |
3415 | } | |
3416 | ||
947216bf AM |
3417 | loc = srel->contents + srel->reloc_count++ * sizeof (Elf32_External_Rel); |
3418 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); | |
252b5132 RH |
3419 | } |
3420 | ||
3421 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) | |
3422 | { | |
3423 | asection * s; | |
947216bf AM |
3424 | Elf_Internal_Rela rel; |
3425 | bfd_byte *loc; | |
252b5132 RH |
3426 | |
3427 | /* This symbol needs a copy reloc. Set it up. */ | |
252b5132 RH |
3428 | BFD_ASSERT (h->dynindx != -1 |
3429 | && (h->root.type == bfd_link_hash_defined | |
3430 | || h->root.type == bfd_link_hash_defweak)); | |
3431 | ||
3432 | s = bfd_get_section_by_name (h->root.u.def.section->owner, | |
3433 | ".rel.bss"); | |
3434 | BFD_ASSERT (s != NULL); | |
3435 | ||
3436 | rel.r_offset = (h->root.u.def.value | |
3437 | + h->root.u.def.section->output_section->vma | |
3438 | + h->root.u.def.section->output_offset); | |
3439 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY); | |
947216bf AM |
3440 | loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rel); |
3441 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); | |
252b5132 RH |
3442 | } |
3443 | ||
3444 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
3445 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
3446 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
3447 | sym->st_shndx = SHN_ABS; | |
3448 | ||
b34976b6 | 3449 | return TRUE; |
252b5132 RH |
3450 | } |
3451 | ||
3452 | /* Finish up the dynamic sections. */ | |
3453 | ||
b34976b6 | 3454 | static bfd_boolean |
252b5132 RH |
3455 | elf32_arm_finish_dynamic_sections (output_bfd, info) |
3456 | bfd * output_bfd; | |
3457 | struct bfd_link_info * info; | |
3458 | { | |
3459 | bfd * dynobj; | |
3460 | asection * sgot; | |
3461 | asection * sdyn; | |
3462 | ||
3463 | dynobj = elf_hash_table (info)->dynobj; | |
3464 | ||
3465 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); | |
3466 | BFD_ASSERT (sgot != NULL); | |
3467 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); | |
3468 | ||
3469 | if (elf_hash_table (info)->dynamic_sections_created) | |
3470 | { | |
3471 | asection *splt; | |
3472 | Elf32_External_Dyn *dyncon, *dynconend; | |
3473 | ||
3474 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
24a1ba0f | 3475 | BFD_ASSERT (splt != NULL && sdyn != NULL); |
252b5132 RH |
3476 | |
3477 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
3478 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size); | |
9b485d32 | 3479 | |
252b5132 RH |
3480 | for (; dyncon < dynconend; dyncon++) |
3481 | { | |
3482 | Elf_Internal_Dyn dyn; | |
3483 | const char * name; | |
3484 | asection * s; | |
3485 | ||
3486 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
3487 | ||
3488 | switch (dyn.d_tag) | |
3489 | { | |
3490 | default: | |
3491 | break; | |
3492 | ||
3493 | case DT_PLTGOT: | |
3494 | name = ".got"; | |
3495 | goto get_vma; | |
3496 | case DT_JMPREL: | |
3497 | name = ".rel.plt"; | |
3498 | get_vma: | |
3499 | s = bfd_get_section_by_name (output_bfd, name); | |
3500 | BFD_ASSERT (s != NULL); | |
3501 | dyn.d_un.d_ptr = s->vma; | |
3502 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
3503 | break; | |
3504 | ||
3505 | case DT_PLTRELSZ: | |
3506 | s = bfd_get_section_by_name (output_bfd, ".rel.plt"); | |
3507 | BFD_ASSERT (s != NULL); | |
3508 | if (s->_cooked_size != 0) | |
3509 | dyn.d_un.d_val = s->_cooked_size; | |
3510 | else | |
3511 | dyn.d_un.d_val = s->_raw_size; | |
3512 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
3513 | break; | |
3514 | ||
3515 | case DT_RELSZ: | |
3516 | /* My reading of the SVR4 ABI indicates that the | |
3517 | procedure linkage table relocs (DT_JMPREL) should be | |
3518 | included in the overall relocs (DT_REL). This is | |
3519 | what Solaris does. However, UnixWare can not handle | |
3520 | that case. Therefore, we override the DT_RELSZ entry | |
3521 | here to make it not include the JMPREL relocs. Since | |
3522 | the linker script arranges for .rel.plt to follow all | |
3523 | other relocation sections, we don't have to worry | |
3524 | about changing the DT_REL entry. */ | |
3525 | s = bfd_get_section_by_name (output_bfd, ".rel.plt"); | |
3526 | if (s != NULL) | |
3527 | { | |
3528 | if (s->_cooked_size != 0) | |
3529 | dyn.d_un.d_val -= s->_cooked_size; | |
3530 | else | |
3531 | dyn.d_un.d_val -= s->_raw_size; | |
3532 | } | |
3533 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
3534 | break; | |
88f7bcd5 NC |
3535 | |
3536 | /* Set the bottom bit of DT_INIT/FINI if the | |
3537 | corresponding function is Thumb. */ | |
3538 | case DT_INIT: | |
3539 | name = info->init_function; | |
3540 | goto get_sym; | |
3541 | case DT_FINI: | |
3542 | name = info->fini_function; | |
3543 | get_sym: | |
3544 | /* If it wasn't set by elf_bfd_final_link | |
3545 | then there is nothing to ajdust. */ | |
3546 | if (dyn.d_un.d_val != 0) | |
3547 | { | |
3548 | struct elf_link_hash_entry * eh; | |
3549 | ||
3550 | eh = elf_link_hash_lookup (elf_hash_table (info), name, | |
b34976b6 | 3551 | FALSE, FALSE, TRUE); |
88f7bcd5 NC |
3552 | if (eh != (struct elf_link_hash_entry *) NULL |
3553 | && ELF_ST_TYPE (eh->type) == STT_ARM_TFUNC) | |
3554 | { | |
3555 | dyn.d_un.d_val |= 1; | |
b34976b6 | 3556 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
88f7bcd5 NC |
3557 | } |
3558 | } | |
3559 | break; | |
252b5132 RH |
3560 | } |
3561 | } | |
3562 | ||
24a1ba0f | 3563 | /* Fill in the first entry in the procedure linkage table. */ |
252b5132 | 3564 | if (splt->_raw_size > 0) |
f7a74f8c NC |
3565 | { |
3566 | bfd_put_32 (output_bfd, elf32_arm_plt0_entry[0], splt->contents + 0); | |
3567 | bfd_put_32 (output_bfd, elf32_arm_plt0_entry[1], splt->contents + 4); | |
3568 | bfd_put_32 (output_bfd, elf32_arm_plt0_entry[2], splt->contents + 8); | |
3569 | bfd_put_32 (output_bfd, elf32_arm_plt0_entry[3], splt->contents + 12); | |
3570 | } | |
252b5132 RH |
3571 | |
3572 | /* UnixWare sets the entsize of .plt to 4, although that doesn't | |
3573 | really seem like the right value. */ | |
3574 | elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4; | |
3575 | } | |
3576 | ||
3577 | /* Fill in the first three entries in the global offset table. */ | |
3578 | if (sgot->_raw_size > 0) | |
3579 | { | |
3580 | if (sdyn == NULL) | |
3581 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); | |
3582 | else | |
3583 | bfd_put_32 (output_bfd, | |
3584 | sdyn->output_section->vma + sdyn->output_offset, | |
3585 | sgot->contents); | |
3586 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); | |
3587 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); | |
3588 | } | |
3589 | ||
3590 | elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; | |
3591 | ||
b34976b6 | 3592 | return TRUE; |
252b5132 RH |
3593 | } |
3594 | ||
ba96a88f NC |
3595 | static void |
3596 | elf32_arm_post_process_headers (abfd, link_info) | |
3597 | bfd * abfd; | |
5f771d47 | 3598 | struct bfd_link_info * link_info ATTRIBUTE_UNUSED; |
ba96a88f | 3599 | { |
9b485d32 | 3600 | Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */ |
ba96a88f NC |
3601 | |
3602 | i_ehdrp = elf_elfheader (abfd); | |
3603 | ||
3604 | i_ehdrp->e_ident[EI_OSABI] = ARM_ELF_OS_ABI_VERSION; | |
3605 | i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION; | |
3606 | } | |
3607 | ||
99e4ae17 | 3608 | static enum elf_reloc_type_class |
f51e552e AM |
3609 | elf32_arm_reloc_type_class (rela) |
3610 | const Elf_Internal_Rela *rela; | |
99e4ae17 | 3611 | { |
f51e552e | 3612 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
99e4ae17 AJ |
3613 | { |
3614 | case R_ARM_RELATIVE: | |
3615 | return reloc_class_relative; | |
3616 | case R_ARM_JUMP_SLOT: | |
3617 | return reloc_class_plt; | |
3618 | case R_ARM_COPY: | |
3619 | return reloc_class_copy; | |
3620 | default: | |
3621 | return reloc_class_normal; | |
3622 | } | |
3623 | } | |
3624 | ||
3625 | ||
252b5132 RH |
3626 | #define ELF_ARCH bfd_arch_arm |
3627 | #define ELF_MACHINE_CODE EM_ARM | |
f21f3fe0 | 3628 | #define ELF_MAXPAGESIZE 0x8000 |
252b5132 | 3629 | |
99e4ae17 AJ |
3630 | #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data |
3631 | #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data | |
252b5132 RH |
3632 | #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags |
3633 | #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data | |
3634 | #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create | |
dc810e39 | 3635 | #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup |
252b5132 RH |
3636 | #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line |
3637 | ||
3638 | #define elf_backend_get_symbol_type elf32_arm_get_symbol_type | |
3639 | #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook | |
3640 | #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook | |
3641 | #define elf_backend_check_relocs elf32_arm_check_relocs | |
dc810e39 | 3642 | #define elf_backend_relocate_section elf32_arm_relocate_section |
252b5132 | 3643 | #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol |
24a1ba0f | 3644 | #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections |
252b5132 RH |
3645 | #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol |
3646 | #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections | |
3647 | #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections | |
ba96a88f | 3648 | #define elf_backend_post_process_headers elf32_arm_post_process_headers |
99e4ae17 | 3649 | #define elf_backend_reloc_type_class elf32_arm_reloc_type_class |
252b5132 RH |
3650 | |
3651 | #define elf_backend_can_gc_sections 1 | |
3652 | #define elf_backend_plt_readonly 1 | |
3653 | #define elf_backend_want_got_plt 1 | |
3654 | #define elf_backend_want_plt_sym 0 | |
acf8aed4 | 3655 | #if !USE_REL |
b491616a AM |
3656 | #define elf_backend_rela_normal 1 |
3657 | #endif | |
252b5132 | 3658 | |
04f7c78d | 3659 | #define elf_backend_got_header_size 12 |
24a1ba0f | 3660 | #define elf_backend_plt_header_size PLT_ENTRY_SIZE |
04f7c78d | 3661 | |
252b5132 | 3662 | #include "elf32-target.h" |
7e392df6 | 3663 |