Commit | Line | Data |
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252b5132 | 1 | /* BFD back-end for ARM COFF files. |
17505c5c | 2 | Copyright 1990, 91, 92, 93, 94, 95, 96, 97, 98, 99, 2000 |
252b5132 RH |
3 | Free Software Foundation, Inc. |
4 | Written by Cygnus Support. | |
5 | ||
6 | This file is part of BFD, the Binary File Descriptor library. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
21 | ||
22 | #include "bfd.h" | |
23 | #include "sysdep.h" | |
24 | #include "libbfd.h" | |
25 | ||
26 | #include "coff/arm.h" | |
27 | ||
28 | #include "coff/internal.h" | |
29 | ||
30 | #ifdef COFF_WITH_PE | |
31 | #include "coff/pe.h" | |
32 | #endif | |
33 | ||
34 | #include "libcoff.h" | |
35 | ||
36 | /* Macros for manipulation the bits in the flags field of the coff data | |
37 | structure. */ | |
38 | #define APCS_26_FLAG( abfd ) (coff_data (abfd)->flags & F_APCS_26) | |
39 | #define APCS_FLOAT_FLAG( abfd ) (coff_data (abfd)->flags & F_APCS_FLOAT) | |
40 | #define PIC_FLAG( abfd ) (coff_data (abfd)->flags & F_PIC) | |
41 | #define APCS_SET( abfd ) (coff_data (abfd)->flags & F_APCS_SET) | |
42 | #define SET_APCS_FLAGS( abfd, flgs) (coff_data (abfd)->flags = \ | |
43 | (coff_data (abfd)->flags & ~ (F_APCS_26 | F_APCS_FLOAT | F_PIC)) \ | |
44 | | (flgs | F_APCS_SET)) | |
45 | #define INTERWORK_FLAG( abfd ) (coff_data (abfd)->flags & F_INTERWORK) | |
46 | #define INTERWORK_SET( abfd ) (coff_data (abfd)->flags & F_INTERWORK_SET) | |
47 | #define SET_INTERWORK_FLAG( abfd, flg ) (coff_data (abfd)->flags = \ | |
48 | (coff_data (abfd)->flags & ~ F_INTERWORK) \ | |
49 | | (flg | F_INTERWORK_SET)) | |
af74ae99 NC |
50 | |
51 | #ifndef NUM_ELEM | |
52 | #define NUM_ELEM(a) ((sizeof (a)) / sizeof ((a)[0])) | |
53 | #endif | |
d70910e8 | 54 | |
252b5132 RH |
55 | typedef enum {bunknown, b9, b12, b23} thumb_pcrel_branchtype; |
56 | /* some typedefs for holding instructions */ | |
57 | typedef unsigned long int insn32; | |
58 | typedef unsigned short int insn16; | |
59 | ||
252b5132 RH |
60 | /* Forward declarations for stupid compilers. */ |
61 | static boolean coff_arm_relocate_section | |
62 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, | |
63 | struct internal_reloc *, struct internal_syment *, asection **)); | |
64 | static bfd_reloc_status_type aoutarm_fix_pcrel_26_done | |
65 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
66 | static bfd_reloc_status_type aoutarm_fix_pcrel_26 | |
67 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
68 | static bfd_reloc_status_type coff_thumb_pcrel_23 | |
69 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
70 | static bfd_reloc_status_type coff_thumb_pcrel_12 | |
71 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
72 | static bfd_reloc_status_type coff_thumb_pcrel_9 | |
73 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
74 | static bfd_reloc_status_type coff_arm_reloc | |
75 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
76 | static boolean coff_arm_adjust_symndx | |
77 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, | |
78 | asection *, struct internal_reloc *, boolean *)); | |
d70910e8 | 79 | static reloc_howto_type * coff_arm_rtype_to_howto |
252b5132 RH |
80 | PARAMS ((bfd *, asection *, struct internal_reloc *, |
81 | struct coff_link_hash_entry *, struct internal_syment *, bfd_vma *)); | |
82 | static bfd_reloc_status_type coff_thumb_pcrel_common | |
83 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **, | |
84 | thumb_pcrel_branchtype)); | |
85 | static CONST struct reloc_howto_struct * coff_arm_reloc_type_lookup | |
86 | PARAMS ((bfd *, bfd_reloc_code_real_type)); | |
87 | static struct bfd_link_hash_table * coff_arm_link_hash_table_create | |
88 | PARAMS ((bfd *)); | |
89 | static insn32 insert_thumb_branch | |
90 | PARAMS ((insn32, int)); | |
91 | static struct coff_link_hash_entry * find_thumb_glue | |
92 | PARAMS ((struct bfd_link_info *, CONST char *, bfd *)); | |
93 | static struct coff_link_hash_entry * find_arm_glue | |
94 | PARAMS ((struct bfd_link_info *, CONST char *, bfd *)); | |
e049a0de | 95 | #ifndef COFF_IMAGE_WITH_PE |
252b5132 RH |
96 | static void record_arm_to_thumb_glue |
97 | PARAMS ((struct bfd_link_info *, struct coff_link_hash_entry *)); | |
98 | static void record_thumb_to_arm_glue | |
99 | PARAMS ((struct bfd_link_info *, struct coff_link_hash_entry *)); | |
e049a0de | 100 | #endif |
252b5132 RH |
101 | static boolean coff_arm_merge_private_bfd_data |
102 | PARAMS ((bfd *, bfd *)); | |
103 | static boolean coff_arm_print_private_bfd_data | |
104 | PARAMS ((bfd *, PTR)); | |
105 | static boolean _bfd_coff_arm_set_private_flags | |
106 | PARAMS ((bfd *, flagword)); | |
107 | static boolean coff_arm_copy_private_bfd_data | |
108 | PARAMS ((bfd *, bfd *)); | |
109 | static boolean coff_arm_is_local_label_name | |
110 | PARAMS ((bfd *, const char *)); | |
111 | static boolean coff_arm_link_output_has_begun | |
112 | PARAMS ((bfd *, struct coff_final_link_info *)); | |
113 | static boolean coff_arm_final_link_postscript | |
114 | PARAMS ((bfd *, struct coff_final_link_info *)); | |
115 | ||
116 | /* The linker script knows the section names for placement. | |
117 | The entry_names are used to do simple name mangling on the stubs. | |
118 | Given a function name, and its type, the stub can be found. The | |
119 | name can be changed. The only requirement is the %s be present. | |
120 | */ | |
d70910e8 | 121 | |
252b5132 RH |
122 | #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t" |
123 | #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb" | |
124 | ||
125 | #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7" | |
126 | #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm" | |
127 | ||
d70910e8 | 128 | /* Used by the assembler. */ |
252b5132 RH |
129 | static bfd_reloc_status_type |
130 | coff_arm_reloc (abfd, reloc_entry, symbol, data, input_section, output_bfd, | |
131 | error_message) | |
132 | bfd *abfd; | |
133 | arelent *reloc_entry; | |
5f771d47 | 134 | asymbol *symbol ATTRIBUTE_UNUSED; |
252b5132 | 135 | PTR data; |
5f771d47 | 136 | asection *input_section ATTRIBUTE_UNUSED; |
252b5132 | 137 | bfd *output_bfd; |
5f771d47 | 138 | char **error_message ATTRIBUTE_UNUSED; |
252b5132 RH |
139 | { |
140 | symvalue diff; | |
141 | if (output_bfd == (bfd *) NULL) | |
142 | return bfd_reloc_continue; | |
143 | ||
144 | diff = reloc_entry->addend; | |
145 | ||
146 | #define DOIT(x) \ | |
147 | x = ((x & ~howto->dst_mask) | (((x & howto->src_mask) + diff) & howto->dst_mask)) | |
148 | ||
149 | if (diff != 0) | |
150 | { | |
151 | reloc_howto_type *howto = reloc_entry->howto; | |
152 | unsigned char *addr = (unsigned char *) data + reloc_entry->address; | |
153 | ||
154 | switch (howto->size) | |
155 | { | |
156 | case 0: | |
157 | { | |
158 | char x = bfd_get_8 (abfd, addr); | |
159 | DOIT (x); | |
160 | bfd_put_8 (abfd, x, addr); | |
161 | } | |
162 | break; | |
163 | ||
164 | case 1: | |
165 | { | |
166 | short x = bfd_get_16 (abfd, addr); | |
167 | DOIT (x); | |
168 | bfd_put_16 (abfd, x, addr); | |
169 | } | |
170 | break; | |
171 | ||
172 | case 2: | |
173 | { | |
174 | long x = bfd_get_32 (abfd, addr); | |
175 | DOIT (x); | |
176 | bfd_put_32 (abfd, x, addr); | |
177 | } | |
178 | break; | |
179 | ||
180 | default: | |
181 | abort (); | |
182 | } | |
183 | } | |
184 | ||
185 | /* Now let bfd_perform_relocation finish everything up. */ | |
186 | return bfd_reloc_continue; | |
187 | } | |
188 | ||
189 | /* If USER_LABEL_PREFIX is defined as "_" (see coff_arm_is_local_label_name() | |
190 | in this file), then TARGET_UNDERSCORE should be defined, otherwise it | |
191 | should not. */ | |
192 | #ifndef TARGET_UNDERSCORE | |
193 | #define TARGET_UNDERSCORE '_' | |
194 | #endif | |
195 | ||
196 | #ifndef PCRELOFFSET | |
197 | #define PCRELOFFSET true | |
198 | #endif | |
199 | ||
200 | /* These most certainly belong somewhere else. Just had to get rid of | |
17505c5c | 201 | the manifest constants in the code. */ |
252b5132 RH |
202 | #define ARM_8 0 |
203 | #define ARM_16 1 | |
204 | #define ARM_32 2 | |
205 | #define ARM_26 3 | |
206 | #define ARM_DISP8 4 | |
207 | #define ARM_DISP16 5 | |
208 | #define ARM_DISP32 6 | |
209 | #define ARM_26D 7 | |
210 | /* 8 is unused */ | |
211 | #define ARM_NEG16 9 | |
212 | #define ARM_NEG32 10 | |
213 | #define ARM_RVA32 11 | |
214 | #define ARM_THUMB9 12 | |
215 | #define ARM_THUMB12 13 | |
216 | #define ARM_THUMB23 14 | |
217 | ||
17505c5c NC |
218 | #ifdef ARM_WINCE |
219 | #undef ARM_32 | |
220 | #undef ARM_RVA32 | |
221 | #undef ARM_26 | |
222 | #undef ARM_THUMB12 | |
223 | #undef ARM_26D | |
224 | ||
225 | #define ARM_32 1 | |
226 | #define ARM_RVA32 2 | |
227 | #define ARM_26 3 | |
228 | #define ARM_THUMB12 4 | |
229 | #define ARM_26D 5 | |
230 | #define ARM_SECTION 14 | |
231 | #define ARM_SECREL 15 | |
232 | #endif | |
233 | ||
d70910e8 | 234 | static reloc_howto_type aoutarm_std_reloc_howto[] = |
252b5132 RH |
235 | { |
236 | /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */ | |
17505c5c NC |
237 | #ifdef ARM_WINCE |
238 | EMPTY_HOWTO (-1), | |
d70910e8 | 239 | HOWTO (ARM_32, |
17505c5c | 240 | 0, |
d70910e8 | 241 | 2, |
17505c5c NC |
242 | 32, |
243 | false, | |
244 | 0, | |
245 | complain_overflow_bitfield, | |
246 | coff_arm_reloc, | |
247 | "ARM_32", | |
248 | true, | |
249 | 0xffffffff, | |
250 | 0xffffffff, | |
251 | PCRELOFFSET), | |
d70910e8 | 252 | HOWTO (ARM_RVA32, |
17505c5c | 253 | 0, |
d70910e8 | 254 | 2, |
17505c5c NC |
255 | 32, |
256 | false, | |
257 | 0, | |
258 | complain_overflow_bitfield, | |
259 | coff_arm_reloc, | |
260 | "ARM_RVA32", | |
261 | true, | |
262 | 0xffffffff, | |
263 | 0xffffffff, | |
264 | PCRELOFFSET), | |
265 | HOWTO (ARM_26, | |
266 | 2, | |
267 | 2, | |
268 | 24, | |
269 | true, | |
270 | 0, | |
271 | complain_overflow_signed, | |
272 | aoutarm_fix_pcrel_26 , | |
273 | "ARM_26", | |
274 | false, | |
275 | 0x00ffffff, | |
d70910e8 | 276 | 0x00ffffff, |
17505c5c NC |
277 | PCRELOFFSET), |
278 | HOWTO (ARM_THUMB12, | |
279 | 1, | |
280 | 1, | |
281 | 11, | |
282 | true, | |
283 | 0, | |
284 | complain_overflow_signed, | |
285 | coff_thumb_pcrel_12 , | |
286 | "ARM_THUMB12", | |
287 | false, | |
288 | 0x000007ff, | |
d70910e8 | 289 | 0x000007ff, |
17505c5c | 290 | PCRELOFFSET), |
d70910e8 KH |
291 | HOWTO (ARM_26D, |
292 | 2, | |
17505c5c NC |
293 | 2, |
294 | 24, | |
295 | false, | |
296 | 0, | |
297 | complain_overflow_dont, | |
d70910e8 | 298 | aoutarm_fix_pcrel_26_done, |
17505c5c NC |
299 | "ARM_26D", |
300 | true, | |
301 | 0x00ffffff, | |
302 | 0x0, | |
303 | false), | |
304 | EMPTY_HOWTO (-1), | |
305 | EMPTY_HOWTO (-1), | |
306 | EMPTY_HOWTO (-1), | |
307 | EMPTY_HOWTO (-1), | |
308 | EMPTY_HOWTO (-1), | |
309 | EMPTY_HOWTO (-1), | |
310 | EMPTY_HOWTO (-1), | |
311 | EMPTY_HOWTO (-1), | |
d70910e8 KH |
312 | HOWTO (ARM_SECTION, |
313 | 0, | |
314 | 1, | |
315 | 16, | |
17505c5c NC |
316 | false, |
317 | 0, | |
318 | complain_overflow_bitfield, | |
319 | coff_arm_reloc, | |
d70910e8 | 320 | "ARM_16", |
17505c5c NC |
321 | true, |
322 | 0x0000ffff, | |
d70910e8 | 323 | 0x0000ffff, |
17505c5c | 324 | PCRELOFFSET), |
d70910e8 | 325 | HOWTO (ARM_SECREL, |
17505c5c | 326 | 0, |
d70910e8 | 327 | 2, |
17505c5c NC |
328 | 32, |
329 | false, | |
330 | 0, | |
331 | complain_overflow_bitfield, | |
332 | coff_arm_reloc, | |
333 | "ARM_32", | |
334 | true, | |
335 | 0xffffffff, | |
336 | 0xffffffff, | |
337 | PCRELOFFSET), | |
338 | #else /* not ARM_WINCE */ | |
252b5132 RH |
339 | HOWTO(ARM_8, /* type */ |
340 | 0, /* rightshift */ | |
341 | 0, /* size */ | |
342 | 8, /* bitsize */ | |
343 | false, /* pc_relative */ | |
344 | 0, /* bitpos */ | |
345 | complain_overflow_bitfield, /* complain_on_overflow */ | |
346 | coff_arm_reloc, /* special_function */ | |
347 | "ARM_8", /* name */ | |
348 | true, /* partial_inplace */ | |
349 | 0x000000ff, /* src_mask */ | |
350 | 0x000000ff, /* dst_mask */ | |
351 | PCRELOFFSET /* pcrel_offset */), | |
d70910e8 KH |
352 | HOWTO(ARM_16, |
353 | 0, | |
354 | 1, | |
355 | 16, | |
252b5132 RH |
356 | false, |
357 | 0, | |
358 | complain_overflow_bitfield, | |
359 | coff_arm_reloc, | |
d70910e8 | 360 | "ARM_16", |
252b5132 RH |
361 | true, |
362 | 0x0000ffff, | |
d70910e8 | 363 | 0x0000ffff, |
252b5132 | 364 | PCRELOFFSET), |
d70910e8 | 365 | HOWTO(ARM_32, |
252b5132 | 366 | 0, |
d70910e8 | 367 | 2, |
252b5132 RH |
368 | 32, |
369 | false, | |
370 | 0, | |
371 | complain_overflow_bitfield, | |
372 | coff_arm_reloc, | |
373 | "ARM_32", | |
374 | true, | |
375 | 0xffffffff, | |
376 | 0xffffffff, | |
377 | PCRELOFFSET), | |
378 | HOWTO(ARM_26, | |
379 | 2, | |
380 | 2, | |
381 | 24, | |
382 | true, | |
383 | 0, | |
384 | complain_overflow_signed, | |
385 | aoutarm_fix_pcrel_26 , | |
386 | "ARM_26", | |
387 | false, | |
388 | 0x00ffffff, | |
d70910e8 | 389 | 0x00ffffff, |
252b5132 | 390 | PCRELOFFSET), |
d70910e8 | 391 | HOWTO(ARM_DISP8, |
252b5132 RH |
392 | 0, |
393 | 0, | |
d70910e8 | 394 | 8, |
252b5132 RH |
395 | true, |
396 | 0, | |
d70910e8 | 397 | complain_overflow_signed, |
252b5132 | 398 | coff_arm_reloc, |
d70910e8 | 399 | "ARM_DISP8", |
252b5132 RH |
400 | true, |
401 | 0x000000ff, | |
402 | 0x000000ff, | |
403 | true), | |
d70910e8 | 404 | HOWTO( ARM_DISP16, |
252b5132 RH |
405 | 0, |
406 | 1, | |
407 | 16, | |
408 | true, | |
409 | 0, | |
d70910e8 | 410 | complain_overflow_signed, |
252b5132 RH |
411 | coff_arm_reloc, |
412 | "ARM_DISP16", | |
413 | true, | |
414 | 0x0000ffff, | |
415 | 0x0000ffff, | |
416 | true), | |
417 | HOWTO( ARM_DISP32, | |
418 | 0, | |
419 | 2, | |
420 | 32, | |
421 | true, | |
422 | 0, | |
d70910e8 | 423 | complain_overflow_signed, |
252b5132 RH |
424 | coff_arm_reloc, |
425 | "ARM_DISP32", | |
426 | true, | |
427 | 0xffffffff, | |
428 | 0xffffffff, | |
429 | true), | |
d70910e8 KH |
430 | HOWTO( ARM_26D, |
431 | 2, | |
252b5132 RH |
432 | 2, |
433 | 24, | |
434 | false, | |
435 | 0, | |
436 | complain_overflow_dont, | |
d70910e8 | 437 | aoutarm_fix_pcrel_26_done, |
252b5132 RH |
438 | "ARM_26D", |
439 | true, | |
440 | 0x00ffffff, | |
441 | 0x0, | |
442 | false), | |
443 | /* 8 is unused */ | |
5f771d47 | 444 | EMPTY_HOWTO (-1), |
252b5132 RH |
445 | HOWTO( ARM_NEG16, |
446 | 0, | |
447 | -1, | |
448 | 16, | |
449 | false, | |
d70910e8 | 450 | 0, |
252b5132 RH |
451 | complain_overflow_bitfield, |
452 | coff_arm_reloc, | |
453 | "ARM_NEG16", | |
d70910e8 KH |
454 | true, |
455 | 0x0000ffff, | |
252b5132 | 456 | 0x0000ffff, |
252b5132 | 457 | false), |
d70910e8 KH |
458 | HOWTO( ARM_NEG32, |
459 | 0, | |
252b5132 RH |
460 | -2, |
461 | 32, | |
462 | false, | |
463 | 0, | |
464 | complain_overflow_bitfield, | |
465 | coff_arm_reloc, | |
466 | "ARM_NEG32", | |
467 | true, | |
468 | 0xffffffff, | |
469 | 0xffffffff, | |
470 | false), | |
d70910e8 | 471 | HOWTO( ARM_RVA32, |
252b5132 | 472 | 0, |
d70910e8 | 473 | 2, |
252b5132 RH |
474 | 32, |
475 | false, | |
476 | 0, | |
477 | complain_overflow_bitfield, | |
478 | coff_arm_reloc, | |
479 | "ARM_RVA32", | |
480 | true, | |
481 | 0xffffffff, | |
482 | 0xffffffff, | |
483 | PCRELOFFSET), | |
484 | HOWTO( ARM_THUMB9, | |
485 | 1, | |
486 | 1, | |
487 | 8, | |
488 | true, | |
489 | 0, | |
490 | complain_overflow_signed, | |
491 | coff_thumb_pcrel_9 , | |
492 | "ARM_THUMB9", | |
493 | false, | |
494 | 0x000000ff, | |
d70910e8 | 495 | 0x000000ff, |
252b5132 RH |
496 | PCRELOFFSET), |
497 | HOWTO( ARM_THUMB12, | |
498 | 1, | |
499 | 1, | |
500 | 11, | |
501 | true, | |
502 | 0, | |
503 | complain_overflow_signed, | |
504 | coff_thumb_pcrel_12 , | |
505 | "ARM_THUMB12", | |
506 | false, | |
507 | 0x000007ff, | |
d70910e8 | 508 | 0x000007ff, |
252b5132 RH |
509 | PCRELOFFSET), |
510 | HOWTO( ARM_THUMB23, | |
511 | 1, | |
512 | 2, | |
513 | 22, | |
514 | true, | |
515 | 0, | |
516 | complain_overflow_signed, | |
517 | coff_thumb_pcrel_23 , | |
518 | "ARM_THUMB23", | |
519 | false, | |
520 | 0x07ff07ff, | |
d70910e8 | 521 | 0x07ff07ff, |
17505c5c NC |
522 | PCRELOFFSET) |
523 | #endif /* not ARM_WINCE */ | |
252b5132 RH |
524 | }; |
525 | ||
af74ae99 NC |
526 | #define NUM_RELOCS NUM_ELEM (aoutarm_std_reloc_howto) |
527 | ||
252b5132 RH |
528 | #ifdef COFF_WITH_PE |
529 | /* Return true if this relocation should | |
d70910e8 | 530 | appear in the output .reloc section. */ |
252b5132 RH |
531 | |
532 | static boolean | |
533 | in_reloc_p (abfd, howto) | |
5f771d47 | 534 | bfd * abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
535 | reloc_howto_type * howto; |
536 | { | |
537 | return !howto->pc_relative && howto->type != ARM_RVA32; | |
d70910e8 | 538 | } |
252b5132 RH |
539 | #endif |
540 | ||
af74ae99 NC |
541 | #define RTYPE2HOWTO(cache_ptr, dst) \ |
542 | (cache_ptr)->howto = \ | |
543 | (dst)->r_type < NUM_RELOCS \ | |
544 | ? aoutarm_std_reloc_howto + (dst)->r_type \ | |
545 | : NULL | |
252b5132 RH |
546 | |
547 | #define coff_rtype_to_howto coff_arm_rtype_to_howto | |
548 | ||
549 | static reloc_howto_type * | |
550 | coff_arm_rtype_to_howto (abfd, sec, rel, h, sym, addendp) | |
5f771d47 | 551 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
552 | asection *sec; |
553 | struct internal_reloc *rel; | |
5f771d47 ILT |
554 | struct coff_link_hash_entry *h ATTRIBUTE_UNUSED; |
555 | struct internal_syment *sym ATTRIBUTE_UNUSED; | |
252b5132 RH |
556 | bfd_vma *addendp; |
557 | { | |
af74ae99 | 558 | reloc_howto_type * howto; |
252b5132 | 559 | |
af74ae99 NC |
560 | if (rel->r_type >= NUM_RELOCS) |
561 | return NULL; | |
d70910e8 | 562 | |
252b5132 RH |
563 | howto = aoutarm_std_reloc_howto + rel->r_type; |
564 | ||
565 | if (rel->r_type == ARM_RVA32) | |
17505c5c | 566 | *addendp -= pe_data (sec->output_section->owner)->pe_opthdr.ImageBase; |
252b5132 RH |
567 | |
568 | return howto; | |
252b5132 | 569 | } |
d70910e8 | 570 | /* Used by the assembler. */ |
252b5132 RH |
571 | |
572 | static bfd_reloc_status_type | |
573 | aoutarm_fix_pcrel_26_done (abfd, reloc_entry, symbol, data, input_section, | |
574 | output_bfd, error_message) | |
5f771d47 ILT |
575 | bfd *abfd ATTRIBUTE_UNUSED; |
576 | arelent *reloc_entry ATTRIBUTE_UNUSED; | |
577 | asymbol *symbol ATTRIBUTE_UNUSED; | |
578 | PTR data ATTRIBUTE_UNUSED; | |
579 | asection *input_section ATTRIBUTE_UNUSED; | |
580 | bfd *output_bfd ATTRIBUTE_UNUSED; | |
581 | char **error_message ATTRIBUTE_UNUSED; | |
252b5132 RH |
582 | { |
583 | /* This is dead simple at present. */ | |
584 | return bfd_reloc_ok; | |
585 | } | |
586 | ||
d70910e8 | 587 | /* Used by the assembler. */ |
252b5132 RH |
588 | |
589 | static bfd_reloc_status_type | |
590 | aoutarm_fix_pcrel_26 (abfd, reloc_entry, symbol, data, input_section, | |
591 | output_bfd, error_message) | |
592 | bfd *abfd; | |
593 | arelent *reloc_entry; | |
594 | asymbol *symbol; | |
595 | PTR data; | |
596 | asection *input_section; | |
597 | bfd *output_bfd; | |
5f771d47 | 598 | char **error_message ATTRIBUTE_UNUSED; |
252b5132 RH |
599 | { |
600 | bfd_vma relocation; | |
601 | bfd_size_type addr = reloc_entry->address; | |
602 | long target = bfd_get_32 (abfd, (bfd_byte *) data + addr); | |
603 | bfd_reloc_status_type flag = bfd_reloc_ok; | |
d70910e8 | 604 | |
252b5132 RH |
605 | /* If this is an undefined symbol, return error */ |
606 | if (symbol->section == &bfd_und_section | |
607 | && (symbol->flags & BSF_WEAK) == 0) | |
608 | return output_bfd ? bfd_reloc_continue : bfd_reloc_undefined; | |
609 | ||
610 | /* If the sections are different, and we are doing a partial relocation, | |
611 | just ignore it for now. */ | |
612 | if (symbol->section->name != input_section->name | |
613 | && output_bfd != (bfd *)NULL) | |
614 | return bfd_reloc_continue; | |
615 | ||
616 | relocation = (target & 0x00ffffff) << 2; | |
617 | relocation = (relocation ^ 0x02000000) - 0x02000000; /* Sign extend */ | |
618 | relocation += symbol->value; | |
619 | relocation += symbol->section->output_section->vma; | |
620 | relocation += symbol->section->output_offset; | |
621 | relocation += reloc_entry->addend; | |
622 | relocation -= input_section->output_section->vma; | |
623 | relocation -= input_section->output_offset; | |
624 | relocation -= addr; | |
d70910e8 | 625 | |
252b5132 RH |
626 | if (relocation & 3) |
627 | return bfd_reloc_overflow; | |
628 | ||
629 | /* Check for overflow */ | |
630 | if (relocation & 0x02000000) | |
631 | { | |
632 | if ((relocation & ~ (bfd_vma) 0x03ffffff) != ~ (bfd_vma) 0x03ffffff) | |
633 | flag = bfd_reloc_overflow; | |
634 | } | |
635 | else if (relocation & ~0x03ffffff) | |
636 | flag = bfd_reloc_overflow; | |
637 | ||
638 | target &= ~0x00ffffff; | |
639 | target |= (relocation >> 2) & 0x00ffffff; | |
640 | bfd_put_32 (abfd, target, (bfd_byte *) data + addr); | |
641 | ||
642 | /* Now the ARM magic... Change the reloc type so that it is marked as done. | |
643 | Strictly this is only necessary if we are doing a partial relocation. */ | |
644 | reloc_entry->howto = &aoutarm_std_reloc_howto[ARM_26D]; | |
645 | ||
646 | return flag; | |
647 | } | |
648 | ||
649 | static bfd_reloc_status_type | |
650 | coff_thumb_pcrel_common (abfd, reloc_entry, symbol, data, input_section, | |
651 | output_bfd, error_message, btype) | |
652 | bfd *abfd; | |
653 | arelent *reloc_entry; | |
654 | asymbol *symbol; | |
655 | PTR data; | |
656 | asection *input_section; | |
657 | bfd *output_bfd; | |
5f771d47 | 658 | char **error_message ATTRIBUTE_UNUSED; |
252b5132 RH |
659 | thumb_pcrel_branchtype btype; |
660 | { | |
661 | bfd_vma relocation = 0; | |
662 | bfd_size_type addr = reloc_entry->address; | |
663 | long target = bfd_get_32 (abfd, (bfd_byte *) data + addr); | |
664 | bfd_reloc_status_type flag = bfd_reloc_ok; | |
665 | bfd_vma dstmsk; | |
666 | bfd_vma offmsk; | |
667 | bfd_vma signbit; | |
668 | ||
669 | /* NOTE: This routine is currently used by GAS, but not by the link | |
670 | phase. */ | |
671 | ||
672 | switch (btype) | |
673 | { | |
674 | case b9: | |
675 | dstmsk = 0x000000ff; | |
676 | offmsk = 0x000001fe; | |
677 | signbit = 0x00000100; | |
678 | break; | |
679 | ||
680 | case b12: | |
681 | dstmsk = 0x000007ff; | |
682 | offmsk = 0x00000ffe; | |
683 | signbit = 0x00000800; | |
684 | break; | |
685 | ||
686 | case b23: | |
687 | dstmsk = 0x07ff07ff; | |
688 | offmsk = 0x007fffff; | |
689 | signbit = 0x00400000; | |
690 | break; | |
691 | ||
692 | default: | |
693 | abort (); | |
694 | } | |
d70910e8 | 695 | |
252b5132 RH |
696 | /* If this is an undefined symbol, return error */ |
697 | if (symbol->section == &bfd_und_section | |
698 | && (symbol->flags & BSF_WEAK) == 0) | |
699 | return output_bfd ? bfd_reloc_continue : bfd_reloc_undefined; | |
700 | ||
701 | /* If the sections are different, and we are doing a partial relocation, | |
702 | just ignore it for now. */ | |
703 | if (symbol->section->name != input_section->name | |
704 | && output_bfd != (bfd *)NULL) | |
705 | return bfd_reloc_continue; | |
706 | ||
707 | switch (btype) | |
708 | { | |
709 | case b9: | |
710 | case b12: | |
711 | relocation = ((target & dstmsk) << 1); | |
712 | break; | |
713 | ||
714 | case b23: | |
715 | if (bfd_big_endian (abfd)) | |
716 | relocation = ((target & 0x7ff) << 1) | ((target & 0x07ff0000) >> 4); | |
717 | else | |
718 | relocation = ((target & 0x7ff) << 12) | ((target & 0x07ff0000) >> 15); | |
719 | break; | |
720 | ||
721 | default: | |
722 | abort (); | |
723 | } | |
724 | ||
725 | relocation = (relocation ^ signbit) - signbit; /* Sign extend */ | |
726 | relocation += symbol->value; | |
727 | relocation += symbol->section->output_section->vma; | |
728 | relocation += symbol->section->output_offset; | |
729 | relocation += reloc_entry->addend; | |
730 | relocation -= input_section->output_section->vma; | |
731 | relocation -= input_section->output_offset; | |
732 | relocation -= addr; | |
733 | ||
734 | if (relocation & 1) | |
735 | return bfd_reloc_overflow; | |
736 | ||
737 | /* Check for overflow */ | |
738 | if (relocation & signbit) | |
739 | { | |
740 | if ((relocation & ~offmsk) != ~offmsk) | |
741 | flag = bfd_reloc_overflow; | |
742 | } | |
743 | else if (relocation & ~offmsk) | |
744 | flag = bfd_reloc_overflow; | |
745 | ||
746 | target &= ~dstmsk; | |
747 | switch (btype) | |
748 | { | |
749 | case b9: | |
750 | case b12: | |
751 | target |= (relocation >> 1); | |
752 | break; | |
753 | ||
754 | case b23: | |
755 | if (bfd_big_endian (abfd)) | |
756 | target |= ((relocation & 0xfff) >> 1) | ((relocation << 4) & 0x07ff0000); | |
757 | else | |
758 | target |= ((relocation & 0xffe) << 15) | ((relocation >> 12) & 0x7ff); | |
759 | break; | |
760 | ||
761 | default: | |
762 | abort (); | |
763 | } | |
764 | ||
765 | bfd_put_32 (abfd, target, (bfd_byte *) data + addr); | |
766 | ||
767 | /* Now the ARM magic... Change the reloc type so that it is marked as done. | |
768 | Strictly this is only necessary if we are doing a partial relocation. */ | |
769 | reloc_entry->howto = & aoutarm_std_reloc_howto [ARM_26D]; | |
d70910e8 | 770 | |
252b5132 RH |
771 | /* TODO: We should possibly have DONE entries for the THUMB PCREL relocations */ |
772 | return flag; | |
773 | } | |
774 | ||
775 | static bfd_reloc_status_type | |
776 | coff_thumb_pcrel_23 (abfd, reloc_entry, symbol, data, input_section, | |
777 | output_bfd, error_message) | |
778 | bfd *abfd; | |
779 | arelent *reloc_entry; | |
780 | asymbol *symbol; | |
781 | PTR data; | |
782 | asection *input_section; | |
783 | bfd *output_bfd; | |
784 | char **error_message; | |
785 | { | |
786 | return coff_thumb_pcrel_common (abfd, reloc_entry, symbol, data, | |
787 | input_section, output_bfd, error_message, b23); | |
788 | } | |
789 | ||
790 | static bfd_reloc_status_type | |
791 | coff_thumb_pcrel_12 (abfd, reloc_entry, symbol, data, input_section, | |
792 | output_bfd, error_message) | |
793 | bfd *abfd; | |
794 | arelent *reloc_entry; | |
795 | asymbol *symbol; | |
796 | PTR data; | |
797 | asection *input_section; | |
798 | bfd *output_bfd; | |
799 | char **error_message; | |
800 | { | |
801 | return coff_thumb_pcrel_common (abfd, reloc_entry, symbol, data, | |
802 | input_section, output_bfd, error_message, b12); | |
803 | } | |
804 | ||
805 | static bfd_reloc_status_type | |
806 | coff_thumb_pcrel_9 (abfd, reloc_entry, symbol, data, input_section, | |
807 | output_bfd, error_message) | |
808 | bfd *abfd; | |
809 | arelent *reloc_entry; | |
810 | asymbol *symbol; | |
811 | PTR data; | |
812 | asection *input_section; | |
813 | bfd *output_bfd; | |
814 | char **error_message; | |
815 | { | |
816 | return coff_thumb_pcrel_common (abfd, reloc_entry, symbol, data, | |
817 | input_section, output_bfd, error_message, b9); | |
818 | } | |
819 | ||
252b5132 RH |
820 | static CONST struct reloc_howto_struct * |
821 | coff_arm_reloc_type_lookup (abfd, code) | |
822 | bfd * abfd; | |
823 | bfd_reloc_code_real_type code; | |
824 | { | |
af74ae99 | 825 | #define ASTD(i,j) case i: return aoutarm_std_reloc_howto + j |
d70910e8 | 826 | |
252b5132 RH |
827 | if (code == BFD_RELOC_CTOR) |
828 | switch (bfd_get_arch_info (abfd)->bits_per_address) | |
829 | { | |
830 | case 32: | |
831 | code = BFD_RELOC_32; | |
832 | break; | |
833 | default: return (CONST struct reloc_howto_struct *) 0; | |
834 | } | |
835 | ||
836 | switch (code) | |
837 | { | |
17505c5c NC |
838 | #ifdef ARM_WINCE |
839 | ASTD (BFD_RELOC_32, ARM_32); | |
840 | ASTD (BFD_RELOC_RVA, ARM_RVA32); | |
841 | ASTD (BFD_RELOC_ARM_PCREL_BRANCH, ARM_26); | |
842 | ASTD (BFD_RELOC_THUMB_PCREL_BRANCH12, ARM_THUMB12); | |
843 | #else | |
252b5132 RH |
844 | ASTD (BFD_RELOC_8, ARM_8); |
845 | ASTD (BFD_RELOC_16, ARM_16); | |
846 | ASTD (BFD_RELOC_32, ARM_32); | |
847 | ASTD (BFD_RELOC_ARM_PCREL_BRANCH, ARM_26); | |
077b8428 | 848 | ASTD (BFD_RELOC_ARM_PCREL_BLX, ARM_26); |
252b5132 RH |
849 | ASTD (BFD_RELOC_8_PCREL, ARM_DISP8); |
850 | ASTD (BFD_RELOC_16_PCREL, ARM_DISP16); | |
851 | ASTD (BFD_RELOC_32_PCREL, ARM_DISP32); | |
852 | ASTD (BFD_RELOC_RVA, ARM_RVA32); | |
853 | ASTD (BFD_RELOC_THUMB_PCREL_BRANCH9, ARM_THUMB9); | |
854 | ASTD (BFD_RELOC_THUMB_PCREL_BRANCH12, ARM_THUMB12); | |
855 | ASTD (BFD_RELOC_THUMB_PCREL_BRANCH23, ARM_THUMB23); | |
d70910e8 | 856 | #endif |
252b5132 RH |
857 | default: return (CONST struct reloc_howto_struct *) 0; |
858 | } | |
859 | } | |
860 | ||
861 | #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2) | |
862 | #define COFF_PAGE_SIZE 0x1000 | |
863 | /* Turn a howto into a reloc nunmber */ | |
864 | ||
865 | #define SELECT_RELOC(x,howto) { x.r_type = howto->type; } | |
866 | #define BADMAG(x) ARMBADMAG(x) | |
867 | #define ARM 1 /* Customize coffcode.h */ | |
868 | ||
869 | /* Extend the coff_link_hash_table structure with a few ARM specific fields. | |
870 | This allows us to store global data here without actually creating any | |
871 | global variables, which is a no-no in the BFD world. */ | |
872 | struct coff_arm_link_hash_table | |
873 | { | |
874 | /* The original coff_link_hash_table structure. MUST be first field. */ | |
875 | struct coff_link_hash_table root; | |
d70910e8 | 876 | |
252b5132 RH |
877 | /* The size in bytes of the section containg the Thumb-to-ARM glue. */ |
878 | long int thumb_glue_size; | |
d70910e8 | 879 | |
252b5132 RH |
880 | /* The size in bytes of the section containg the ARM-to-Thumb glue. */ |
881 | long int arm_glue_size; | |
882 | ||
883 | /* An arbitary input BFD chosen to hold the glue sections. */ | |
884 | bfd * bfd_of_glue_owner; | |
885 | ||
d70910e8 | 886 | /* Support interworking with old, non-interworking aware ARM code. */ |
252b5132 RH |
887 | int support_old_code; |
888 | }; | |
889 | ||
890 | /* Get the ARM coff linker hash table from a link_info structure. */ | |
891 | #define coff_arm_hash_table(info) \ | |
892 | ((struct coff_arm_link_hash_table *) ((info)->hash)) | |
893 | ||
894 | /* Create an ARM coff linker hash table. */ | |
895 | ||
896 | static struct bfd_link_hash_table * | |
897 | coff_arm_link_hash_table_create (abfd) | |
898 | bfd * abfd; | |
899 | { | |
900 | struct coff_arm_link_hash_table * ret; | |
901 | ||
902 | ret = ((struct coff_arm_link_hash_table *) | |
903 | bfd_alloc (abfd, sizeof (struct coff_arm_link_hash_table))); | |
904 | if (ret == (struct coff_arm_link_hash_table *) NULL) | |
905 | return NULL; | |
906 | ||
907 | if (! _bfd_coff_link_hash_table_init | |
908 | (& ret->root, abfd, _bfd_coff_link_hash_newfunc)) | |
909 | { | |
910 | bfd_release (abfd, ret); | |
911 | return (struct bfd_link_hash_table *) NULL; | |
912 | } | |
913 | ||
914 | ret->thumb_glue_size = 0; | |
915 | ret->arm_glue_size = 0; | |
916 | ret->bfd_of_glue_owner = NULL; | |
917 | ||
918 | return & ret->root.root; | |
919 | } | |
920 | ||
271025eb | 921 | static void |
252b5132 RH |
922 | arm_emit_base_file_entry (info, output_bfd, input_section, reloc_offset) |
923 | struct bfd_link_info *info; | |
924 | bfd *output_bfd; | |
925 | asection *input_section; | |
926 | bfd_vma reloc_offset; | |
927 | { | |
928 | bfd_vma addr = reloc_offset | |
929 | - input_section->vma | |
930 | + input_section->output_offset | |
931 | + input_section->output_section->vma; | |
932 | ||
933 | if (coff_data(output_bfd)->pe) | |
934 | addr -= pe_data(output_bfd)->pe_opthdr.ImageBase; | |
935 | fwrite (&addr, 1, sizeof (addr), (FILE *) info->base_file); | |
936 | ||
937 | } | |
938 | \f | |
939 | /* The thumb form of a long branch is a bit finicky, because the offset | |
940 | encoding is split over two fields, each in it's own instruction. They | |
d70910e8 | 941 | can occur in any order. So given a thumb form of long branch, and an |
252b5132 | 942 | offset, insert the offset into the thumb branch and return finished |
d70910e8 | 943 | instruction. |
252b5132 | 944 | |
d70910e8 | 945 | It takes two thumb instructions to encode the target address. Each has |
252b5132 | 946 | 11 bits to invest. The upper 11 bits are stored in one (identifed by |
d70910e8 KH |
947 | H-0.. see below), the lower 11 bits are stored in the other (identified |
948 | by H-1). | |
252b5132 | 949 | |
d70910e8 | 950 | Combine together and shifted left by 1 (it's a half word address) and |
252b5132 RH |
951 | there you have it. |
952 | ||
953 | Op: 1111 = F, | |
954 | H-0, upper address-0 = 000 | |
955 | Op: 1111 = F, | |
956 | H-1, lower address-0 = 800 | |
957 | ||
d70910e8 | 958 | They can be ordered either way, but the arm tools I've seen always put |
252b5132 RH |
959 | the lower one first. It probably doesn't matter. krk@cygnus.com |
960 | ||
961 | XXX: Actually the order does matter. The second instruction (H-1) | |
962 | moves the computed address into the PC, so it must be the second one | |
963 | in the sequence. The problem, however is that whilst little endian code | |
964 | stores the instructions in HI then LOW order, big endian code does the | |
965 | reverse. nickc@cygnus.com */ | |
966 | ||
967 | #define LOW_HI_ORDER 0xF800F000 | |
968 | #define HI_LOW_ORDER 0xF000F800 | |
969 | ||
970 | static insn32 | |
971 | insert_thumb_branch (br_insn, rel_off) | |
972 | insn32 br_insn; | |
973 | int rel_off; | |
974 | { | |
975 | unsigned int low_bits; | |
976 | unsigned int high_bits; | |
977 | ||
252b5132 RH |
978 | BFD_ASSERT((rel_off & 1) != 1); |
979 | ||
980 | rel_off >>= 1; /* half word aligned address */ | |
981 | low_bits = rel_off & 0x000007FF; /* the bottom 11 bits */ | |
982 | high_bits = (rel_off >> 11) & 0x000007FF; /* the top 11 bits */ | |
983 | ||
984 | if ((br_insn & LOW_HI_ORDER) == LOW_HI_ORDER) | |
985 | br_insn = LOW_HI_ORDER | (low_bits << 16) | high_bits; | |
986 | else if ((br_insn & HI_LOW_ORDER) == HI_LOW_ORDER) | |
987 | br_insn = HI_LOW_ORDER | (high_bits << 16) | low_bits; | |
988 | else | |
c5930ee6 | 989 | abort (); /* error - not a valid branch instruction form */ |
252b5132 RH |
990 | |
991 | /* FIXME: abort is probably not the right call. krk@cygnus.com */ | |
992 | ||
993 | return br_insn; | |
994 | } | |
252b5132 RH |
995 | \f |
996 | static struct coff_link_hash_entry * | |
997 | find_thumb_glue (info, name, input_bfd) | |
998 | struct bfd_link_info * info; | |
999 | CONST char * name; | |
1000 | bfd * input_bfd; | |
1001 | { | |
1002 | char * tmp_name; | |
1003 | struct coff_link_hash_entry * myh; | |
1004 | ||
1005 | tmp_name = ((char *) | |
1006 | bfd_malloc (strlen (name) + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1)); | |
1007 | ||
1008 | BFD_ASSERT (tmp_name); | |
1009 | ||
1010 | sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name); | |
d70910e8 | 1011 | |
252b5132 RH |
1012 | myh = coff_link_hash_lookup |
1013 | (coff_hash_table (info), tmp_name, false, false, true); | |
d70910e8 | 1014 | |
252b5132 RH |
1015 | if (myh == NULL) |
1016 | /* xgettext:c-format */ | |
1017 | _bfd_error_handler (_("%s: unable to find THUMB glue '%s' for `%s'"), | |
1018 | bfd_get_filename (input_bfd), tmp_name, name); | |
d70910e8 | 1019 | |
252b5132 RH |
1020 | free (tmp_name); |
1021 | ||
1022 | return myh; | |
1023 | } | |
1024 | ||
1025 | static struct coff_link_hash_entry * | |
1026 | find_arm_glue (info, name, input_bfd) | |
1027 | struct bfd_link_info * info; | |
1028 | CONST char * name; | |
1029 | bfd * input_bfd; | |
1030 | { | |
1031 | char * tmp_name; | |
1032 | struct coff_link_hash_entry * myh; | |
1033 | ||
1034 | tmp_name = ((char *) | |
1035 | bfd_malloc (strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1)); | |
1036 | ||
1037 | BFD_ASSERT (tmp_name); | |
1038 | ||
1039 | sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name); | |
d70910e8 | 1040 | |
252b5132 RH |
1041 | myh = coff_link_hash_lookup |
1042 | (coff_hash_table (info), tmp_name, false, false, true); | |
1043 | ||
1044 | if (myh == NULL) | |
1045 | /* xgettext:c-format */ | |
1046 | _bfd_error_handler (_("%s: unable to find ARM glue '%s' for `%s'"), | |
1047 | bfd_get_filename (input_bfd), tmp_name, name); | |
d70910e8 | 1048 | |
252b5132 RH |
1049 | free (tmp_name); |
1050 | ||
1051 | return myh; | |
1052 | } | |
1053 | ||
1054 | /* | |
1055 | ARM->Thumb glue: | |
1056 | ||
1057 | .arm | |
1058 | __func_from_arm: | |
1059 | ldr r12, __func_addr | |
1060 | bx r12 | |
1061 | __func_addr: | |
1062 | .word func @ behave as if you saw a ARM_32 reloc | |
1063 | */ | |
1064 | ||
1065 | #define ARM2THUMB_GLUE_SIZE 12 | |
1066 | static const insn32 a2t1_ldr_insn = 0xe59fc000; | |
1067 | static const insn32 a2t2_bx_r12_insn = 0xe12fff1c; | |
1068 | static const insn32 a2t3_func_addr_insn = 0x00000001; | |
1069 | ||
252b5132 RH |
1070 | /* |
1071 | Thumb->ARM: Thumb->(non-interworking aware) ARM | |
1072 | ||
1073 | .thumb .thumb | |
1074 | .align 2 .align 2 | |
1075 | __func_from_thumb: __func_from_thumb: | |
1076 | bx pc push {r6, lr} | |
1077 | nop ldr r6, __func_addr | |
1078 | .arm mov lr, pc | |
1079 | __func_change_to_arm: bx r6 | |
1080 | b func .arm | |
1081 | __func_back_to_thumb: | |
1082 | ldmia r13! {r6, lr} | |
1083 | bx lr | |
1084 | __func_addr: | |
d70910e8 | 1085 | .word func |
252b5132 RH |
1086 | */ |
1087 | ||
1088 | #define THUMB2ARM_GLUE_SIZE (globals->support_old_code ? 20 : 8) | |
1089 | static const insn16 t2a1_bx_pc_insn = 0x4778; | |
1090 | static const insn16 t2a2_noop_insn = 0x46c0; | |
1091 | static const insn32 t2a3_b_insn = 0xea000000; | |
1092 | ||
252b5132 RH |
1093 | static const insn16 t2a1_push_insn = 0xb540; |
1094 | static const insn16 t2a2_ldr_insn = 0x4e03; | |
1095 | static const insn16 t2a3_mov_insn = 0x46fe; | |
1096 | static const insn16 t2a4_bx_insn = 0x4730; | |
1097 | static const insn32 t2a5_pop_insn = 0xe8bd4040; | |
1098 | static const insn32 t2a6_bx_insn = 0xe12fff1e; | |
1099 | ||
1100 | /* TODO: | |
1101 | We should really create new local (static) symbols in destination | |
1102 | object for each stub we create. We should also create local | |
1103 | (static) symbols within the stubs when switching between ARM and | |
1104 | Thumb code. This will ensure that the debugger and disassembler | |
1105 | can present a better view of stubs. | |
1106 | ||
1107 | We can treat stubs like literal sections, and for the THUMB9 ones | |
1108 | (short addressing range) we should be able to insert the stubs | |
1109 | between sections. i.e. the simplest approach (since relocations | |
1110 | are done on a section basis) is to dump the stubs at the end of | |
1111 | processing a section. That way we can always try and minimise the | |
1112 | offset to and from a stub. However, this does not map well onto | |
1113 | the way that the linker/BFD does its work: mapping all input | |
1114 | sections to output sections via the linker script before doing | |
1115 | all the processing. | |
1116 | ||
1117 | Unfortunately it may be easier to just to disallow short range | |
1118 | Thumb->ARM stubs (i.e. no conditional inter-working branches, | |
1119 | only branch-and-link (BL) calls. This will simplify the processing | |
1120 | since we can then put all of the stubs into their own section. | |
1121 | ||
1122 | TODO: | |
1123 | On a different subject, rather than complaining when a | |
1124 | branch cannot fit in the number of bits available for the | |
1125 | instruction we should generate a trampoline stub (needed to | |
1126 | address the complete 32bit address space). */ | |
1127 | ||
d70910e8 | 1128 | /* The standard COFF backend linker does not cope with the special |
252b5132 RH |
1129 | Thumb BRANCH23 relocation. The alternative would be to split the |
1130 | BRANCH23 into seperate HI23 and LO23 relocations. However, it is a | |
d70910e8 | 1131 | bit simpler simply providing our own relocation driver. */ |
252b5132 RH |
1132 | |
1133 | /* The reloc processing routine for the ARM/Thumb COFF linker. NOTE: | |
1134 | This code is a very slightly modified copy of | |
1135 | _bfd_coff_generic_relocate_section. It would be a much more | |
1136 | maintainable solution to have a MACRO that could be expanded within | |
1137 | _bfd_coff_generic_relocate_section that would only be provided for | |
1138 | ARM/Thumb builds. It is only the code marked THUMBEXTENSION that | |
1139 | is different from the original. */ | |
1140 | ||
1141 | static boolean | |
1142 | coff_arm_relocate_section (output_bfd, info, input_bfd, input_section, | |
1143 | contents, relocs, syms, sections) | |
1144 | bfd *output_bfd; | |
1145 | struct bfd_link_info *info; | |
1146 | bfd *input_bfd; | |
1147 | asection *input_section; | |
1148 | bfd_byte *contents; | |
1149 | struct internal_reloc *relocs; | |
1150 | struct internal_syment *syms; | |
1151 | asection **sections; | |
1152 | { | |
1153 | struct internal_reloc * rel; | |
1154 | struct internal_reloc * relend; | |
1155 | ||
1156 | rel = relocs; | |
1157 | relend = rel + input_section->reloc_count; | |
1158 | ||
1159 | for (; rel < relend; rel++) | |
1160 | { | |
1161 | int done = 0; | |
1162 | long symndx; | |
1163 | struct coff_link_hash_entry * h; | |
1164 | struct internal_syment * sym; | |
1165 | bfd_vma addend; | |
1166 | bfd_vma val; | |
1167 | reloc_howto_type * howto; | |
1168 | bfd_reloc_status_type rstat; | |
1169 | bfd_vma h_val; | |
1170 | ||
1171 | symndx = rel->r_symndx; | |
1172 | ||
1173 | if (symndx == -1) | |
1174 | { | |
1175 | h = NULL; | |
1176 | sym = NULL; | |
1177 | } | |
1178 | else | |
d70910e8 | 1179 | { |
252b5132 RH |
1180 | h = obj_coff_sym_hashes (input_bfd)[symndx]; |
1181 | sym = syms + symndx; | |
1182 | } | |
1183 | ||
1184 | /* COFF treats common symbols in one of two ways. Either the | |
1185 | size of the symbol is included in the section contents, or it | |
1186 | is not. We assume that the size is not included, and force | |
1187 | the rtype_to_howto function to adjust the addend as needed. */ | |
1188 | ||
1189 | if (sym != NULL && sym->n_scnum != 0) | |
1190 | addend = - sym->n_value; | |
1191 | else | |
1192 | addend = 0; | |
1193 | ||
252b5132 RH |
1194 | howto = coff_rtype_to_howto (input_bfd, input_section, rel, h, |
1195 | sym, &addend); | |
1196 | if (howto == NULL) | |
1197 | return false; | |
1198 | ||
1199 | /* The relocation_section function will skip pcrel_offset relocs | |
1200 | when doing a relocateable link. However, we want to convert | |
1201 | ARM26 to ARM26D relocs if possible. We return a fake howto in | |
1202 | this case without pcrel_offset set, and adjust the addend to | |
1203 | compensate. */ | |
1204 | if (rel->r_type == ARM_26 | |
1205 | && h != NULL | |
1206 | && info->relocateable | |
1207 | && (h->root.type == bfd_link_hash_defined | |
1208 | || h->root.type == bfd_link_hash_defweak) | |
1209 | && h->root.u.def.section->output_section == input_section->output_section) | |
1210 | { | |
d70910e8 | 1211 | static reloc_howto_type fake_arm26_reloc = |
252b5132 RH |
1212 | HOWTO (ARM_26, |
1213 | 2, | |
1214 | 2, | |
1215 | 24, | |
1216 | true, | |
1217 | 0, | |
1218 | complain_overflow_signed, | |
1219 | aoutarm_fix_pcrel_26 , | |
1220 | "ARM_26", | |
1221 | false, | |
1222 | 0x00ffffff, | |
d70910e8 | 1223 | 0x00ffffff, |
252b5132 RH |
1224 | false); |
1225 | ||
1226 | addend -= rel->r_vaddr - input_section->vma; | |
1227 | howto = &fake_arm26_reloc; | |
1228 | } | |
1229 | ||
17505c5c NC |
1230 | #ifdef ARM_WINCE |
1231 | /* MS ARM-CE makes the reloc relative to the opcode's pc, not | |
d70910e8 | 1232 | the next opcode's pc, so is off by one. */ |
17505c5c NC |
1233 | if (howto->pc_relative && !info->relocateable) |
1234 | addend -= 8; | |
1235 | #endif | |
d70910e8 | 1236 | |
252b5132 RH |
1237 | /* If we are doing a relocateable link, then we can just ignore |
1238 | a PC relative reloc that is pcrel_offset. It will already | |
1239 | have the correct value. If this is not a relocateable link, | |
1240 | then we should ignore the symbol value. */ | |
1241 | if (howto->pc_relative && howto->pcrel_offset) | |
1242 | { | |
1243 | if (info->relocateable) | |
1244 | continue; | |
ed1de528 AO |
1245 | #if 0 /* We must not ignore the symbol value. If the symbol is |
1246 | within the same section, the relocation should have already | |
1247 | been fixed, but if it is not, we'll be handed a reloc into | |
1248 | the beginning of the symbol's section, so we must not cancel | |
1249 | out the symbol's value, otherwise we'll be adding it in | |
1250 | twice. */ | |
252b5132 RH |
1251 | if (sym != NULL && sym->n_scnum != 0) |
1252 | addend += sym->n_value; | |
ed1de528 | 1253 | #endif |
252b5132 RH |
1254 | } |
1255 | ||
1256 | val = 0; | |
1257 | ||
1258 | if (h == NULL) | |
1259 | { | |
1260 | asection *sec; | |
1261 | ||
1262 | if (symndx == -1) | |
1263 | { | |
1264 | sec = bfd_abs_section_ptr; | |
1265 | val = 0; | |
1266 | } | |
1267 | else | |
1268 | { | |
1269 | sec = sections[symndx]; | |
1270 | val = (sec->output_section->vma | |
1271 | + sec->output_offset | |
1272 | + sym->n_value | |
1273 | - sec->vma); | |
1274 | } | |
1275 | } | |
1276 | else | |
1277 | { | |
1278 | #if 1 /* THUMBEXTENSION */ | |
1279 | /* We don't output the stubs if we are generating a | |
1280 | relocatable output file, since we may as well leave the | |
1281 | stub generation to the final linker pass. If we fail to | |
1282 | verify that the name is defined, we'll try to build stubs | |
d70910e8 | 1283 | for an undefined name... */ |
252b5132 RH |
1284 | if (! info->relocateable |
1285 | && ( h->root.type == bfd_link_hash_defined | |
1286 | || h->root.type == bfd_link_hash_defweak)) | |
1287 | { | |
1288 | asection * h_sec = h->root.u.def.section; | |
1289 | const char * name = h->root.root.string; | |
d70910e8 | 1290 | |
252b5132 RH |
1291 | /* h locates the symbol referenced in the reloc. */ |
1292 | h_val = (h->root.u.def.value | |
1293 | + h_sec->output_section->vma | |
1294 | + h_sec->output_offset); | |
1295 | ||
1296 | if (howto->type == ARM_26) | |
1297 | { | |
1298 | if ( h->class == C_THUMBSTATFUNC | |
1299 | || h->class == C_THUMBEXTFUNC) | |
1300 | { | |
1301 | /* Arm code calling a Thumb function */ | |
1302 | unsigned long int tmp; | |
1303 | long int my_offset; | |
1304 | asection * s; | |
1305 | long int ret_offset; | |
d70910e8 | 1306 | struct coff_link_hash_entry * myh; |
252b5132 | 1307 | struct coff_arm_link_hash_table * globals; |
d70910e8 | 1308 | |
252b5132 RH |
1309 | myh = find_arm_glue (info, name, input_bfd); |
1310 | if (myh == NULL) | |
1311 | return false; | |
1312 | ||
1313 | globals = coff_arm_hash_table (info); | |
1314 | ||
1315 | BFD_ASSERT (globals != NULL); | |
1316 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
d70910e8 | 1317 | |
252b5132 | 1318 | my_offset = myh->root.u.def.value; |
d70910e8 KH |
1319 | |
1320 | s = bfd_get_section_by_name (globals->bfd_of_glue_owner, | |
252b5132 RH |
1321 | ARM2THUMB_GLUE_SECTION_NAME); |
1322 | BFD_ASSERT (s != NULL); | |
1323 | BFD_ASSERT (s->contents != NULL); | |
1324 | BFD_ASSERT (s->output_section != NULL); | |
1325 | ||
1326 | if ((my_offset & 0x01) == 0x01) | |
1327 | { | |
1328 | if (h_sec->owner != NULL | |
1329 | && INTERWORK_SET (h_sec->owner) | |
1330 | && ! INTERWORK_FLAG (h_sec->owner)) | |
1331 | { | |
1332 | _bfd_error_handler | |
1333 | /* xgettext:c-format */ | |
1334 | (_("%s(%s): warning: interworking not enabled."), | |
1335 | bfd_get_filename (h_sec->owner), name); | |
1336 | _bfd_error_handler | |
1337 | /* xgettext:c-format */ | |
1338 | (_(" first occurrence: %s: arm call to thumb"), | |
1339 | bfd_get_filename (input_bfd)); | |
1340 | } | |
1341 | ||
1342 | --my_offset; | |
1343 | myh->root.u.def.value = my_offset; | |
1344 | ||
1345 | bfd_put_32 (output_bfd, a2t1_ldr_insn, | |
1346 | s->contents + my_offset); | |
d70910e8 | 1347 | |
252b5132 RH |
1348 | bfd_put_32 (output_bfd, a2t2_bx_r12_insn, |
1349 | s->contents + my_offset + 4); | |
d70910e8 | 1350 | |
252b5132 RH |
1351 | /* It's a thumb address. Add the low order bit. */ |
1352 | bfd_put_32 (output_bfd, h_val | a2t3_func_addr_insn, | |
1353 | s->contents + my_offset + 8); | |
1354 | ||
1355 | if (info->base_file) | |
d70910e8 | 1356 | arm_emit_base_file_entry (info, output_bfd, s, |
fa0e42e4 | 1357 | my_offset + 8); |
252b5132 RH |
1358 | |
1359 | } | |
1360 | ||
1361 | BFD_ASSERT (my_offset <= globals->arm_glue_size); | |
1362 | ||
1363 | tmp = bfd_get_32 (input_bfd, contents + rel->r_vaddr | |
1364 | - input_section->vma); | |
d70910e8 | 1365 | |
252b5132 RH |
1366 | tmp = tmp & 0xFF000000; |
1367 | ||
d70910e8 | 1368 | /* Somehow these are both 4 too far, so subtract 8. */ |
252b5132 RH |
1369 | ret_offset = |
1370 | s->output_offset | |
d70910e8 | 1371 | + my_offset |
252b5132 RH |
1372 | + s->output_section->vma |
1373 | - (input_section->output_offset | |
d70910e8 | 1374 | + input_section->output_section->vma |
252b5132 RH |
1375 | + rel->r_vaddr) |
1376 | - 8; | |
1377 | ||
1378 | tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF); | |
d70910e8 | 1379 | |
252b5132 RH |
1380 | bfd_put_32 (output_bfd, tmp, contents + rel->r_vaddr |
1381 | - input_section->vma); | |
252b5132 RH |
1382 | done = 1; |
1383 | } | |
1384 | } | |
d70910e8 | 1385 | |
17505c5c | 1386 | #ifndef ARM_WINCE |
252b5132 RH |
1387 | /* Note: We used to check for ARM_THUMB9 and ARM_THUMB12 */ |
1388 | else if (howto->type == ARM_THUMB23) | |
1389 | { | |
d70910e8 | 1390 | if ( h->class == C_EXT |
252b5132 RH |
1391 | || h->class == C_STAT |
1392 | || h->class == C_LABEL) | |
1393 | { | |
1394 | /* Thumb code calling an ARM function */ | |
1395 | asection * s = 0; | |
1396 | long int my_offset; | |
1397 | unsigned long int tmp; | |
1398 | long int ret_offset; | |
1399 | struct coff_link_hash_entry * myh; | |
1400 | struct coff_arm_link_hash_table * globals; | |
1401 | ||
1402 | myh = find_thumb_glue (info, name, input_bfd); | |
1403 | if (myh == NULL) | |
1404 | return false; | |
1405 | ||
1406 | globals = coff_arm_hash_table (info); | |
d70910e8 | 1407 | |
252b5132 RH |
1408 | BFD_ASSERT (globals != NULL); |
1409 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
d70910e8 | 1410 | |
252b5132 | 1411 | my_offset = myh->root.u.def.value; |
d70910e8 KH |
1412 | |
1413 | s = bfd_get_section_by_name (globals->bfd_of_glue_owner, | |
252b5132 | 1414 | THUMB2ARM_GLUE_SECTION_NAME); |
d70910e8 | 1415 | |
252b5132 RH |
1416 | BFD_ASSERT (s != NULL); |
1417 | BFD_ASSERT (s->contents != NULL); | |
1418 | BFD_ASSERT (s->output_section != NULL); | |
d70910e8 | 1419 | |
252b5132 RH |
1420 | if ((my_offset & 0x01) == 0x01) |
1421 | { | |
1422 | if (h_sec->owner != NULL | |
1423 | && INTERWORK_SET (h_sec->owner) | |
1424 | && ! INTERWORK_FLAG (h_sec->owner) | |
1425 | && ! globals->support_old_code) | |
1426 | { | |
1427 | _bfd_error_handler | |
1428 | /* xgettext:c-format */ | |
1429 | (_("%s(%s): warning: interworking not enabled."), | |
1430 | bfd_get_filename (h_sec->owner), name); | |
1431 | _bfd_error_handler | |
1432 | /* xgettext:c-format */ | |
1433 | (_(" first occurrence: %s: thumb call to arm"), | |
1434 | bfd_get_filename (input_bfd)); | |
1435 | _bfd_error_handler | |
1436 | (_(" consider relinking with --support-old-code enabled")); | |
1437 | } | |
d70910e8 | 1438 | |
252b5132 RH |
1439 | -- my_offset; |
1440 | myh->root.u.def.value = my_offset; | |
1441 | ||
1442 | if (globals->support_old_code) | |
1443 | { | |
1444 | bfd_put_16 (output_bfd, t2a1_push_insn, | |
1445 | s->contents + my_offset); | |
d70910e8 | 1446 | |
252b5132 RH |
1447 | bfd_put_16 (output_bfd, t2a2_ldr_insn, |
1448 | s->contents + my_offset + 2); | |
1449 | ||
1450 | bfd_put_16 (output_bfd, t2a3_mov_insn, | |
1451 | s->contents + my_offset + 4); | |
1452 | ||
1453 | bfd_put_16 (output_bfd, t2a4_bx_insn, | |
1454 | s->contents + my_offset + 6); | |
d70910e8 | 1455 | |
252b5132 RH |
1456 | bfd_put_32 (output_bfd, t2a5_pop_insn, |
1457 | s->contents + my_offset + 8); | |
d70910e8 | 1458 | |
252b5132 RH |
1459 | bfd_put_32 (output_bfd, t2a6_bx_insn, |
1460 | s->contents + my_offset + 12); | |
d70910e8 | 1461 | |
252b5132 RH |
1462 | /* Store the address of the function in the last word of the stub. */ |
1463 | bfd_put_32 (output_bfd, h_val, | |
1464 | s->contents + my_offset + 16); | |
fa0e42e4 CM |
1465 | |
1466 | if (info->base_file) | |
1467 | arm_emit_base_file_entry (info, output_bfd, s, my_offset + 16); | |
252b5132 RH |
1468 | } |
1469 | else | |
1470 | { | |
1471 | bfd_put_16 (output_bfd, t2a1_bx_pc_insn, | |
1472 | s->contents + my_offset); | |
d70910e8 | 1473 | |
252b5132 RH |
1474 | bfd_put_16 (output_bfd, t2a2_noop_insn, |
1475 | s->contents + my_offset + 2); | |
d70910e8 | 1476 | |
252b5132 RH |
1477 | ret_offset = |
1478 | ((bfd_signed_vma) h_val) /* Address of destination of the stub */ | |
1479 | - ((bfd_signed_vma) | |
1480 | (s->output_offset /* Offset from the start of the current section to the start of the stubs. */ | |
1481 | + my_offset /* Offset of the start of this stub from the start of the stubs. */ | |
1482 | + s->output_section->vma) /* Address of the start of the current section. */ | |
1483 | + 4 /* The branch instruction is 4 bytes into the stub. */ | |
1484 | + 8); /* ARM branches work from the pc of the instruction + 8. */ | |
d70910e8 | 1485 | |
252b5132 RH |
1486 | bfd_put_32 (output_bfd, |
1487 | t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF), | |
1488 | s->contents + my_offset + 4); | |
1489 | ||
252b5132 RH |
1490 | } |
1491 | } | |
1492 | ||
1493 | BFD_ASSERT (my_offset <= globals->thumb_glue_size); | |
1494 | ||
1495 | /* Now go back and fix up the original BL insn to point | |
1496 | to here. */ | |
1497 | ret_offset = | |
1498 | s->output_offset | |
1499 | + my_offset | |
1500 | - (input_section->output_offset | |
1501 | + rel->r_vaddr) | |
1502 | -4; | |
d70910e8 | 1503 | |
252b5132 RH |
1504 | tmp = bfd_get_32 (input_bfd, contents + rel->r_vaddr |
1505 | - input_section->vma); | |
1506 | ||
1507 | bfd_put_32 (output_bfd, | |
1508 | insert_thumb_branch (tmp, ret_offset), | |
1509 | contents + rel->r_vaddr | |
1510 | - input_section->vma); | |
d70910e8 | 1511 | |
252b5132 RH |
1512 | done = 1; |
1513 | } | |
1514 | } | |
17505c5c | 1515 | #endif |
252b5132 | 1516 | } |
d70910e8 | 1517 | |
252b5132 RH |
1518 | /* If the relocation type and destination symbol does not |
1519 | fall into one of the above categories, then we can just | |
d70910e8 | 1520 | perform a direct link. */ |
252b5132 RH |
1521 | |
1522 | if (done) | |
1523 | rstat = bfd_reloc_ok; | |
d70910e8 | 1524 | else |
252b5132 RH |
1525 | #endif /* THUMBEXTENSION */ |
1526 | if ( h->root.type == bfd_link_hash_defined | |
1527 | || h->root.type == bfd_link_hash_defweak) | |
1528 | { | |
1529 | asection *sec; | |
1530 | ||
1531 | sec = h->root.u.def.section; | |
1532 | val = (h->root.u.def.value | |
1533 | + sec->output_section->vma | |
1534 | + sec->output_offset); | |
1535 | } | |
1536 | ||
1537 | else if (! info->relocateable) | |
1538 | { | |
1539 | if (! ((*info->callbacks->undefined_symbol) | |
1540 | (info, h->root.root.string, input_bfd, input_section, | |
5cc7c785 | 1541 | rel->r_vaddr - input_section->vma, true))) |
252b5132 RH |
1542 | return false; |
1543 | } | |
1544 | } | |
1545 | ||
1546 | if (info->base_file) | |
1547 | { | |
d70910e8 | 1548 | /* Emit a reloc if the backend thinks it needs it. */ |
252b5132 RH |
1549 | if (sym && pe_data(output_bfd)->in_reloc_p(output_bfd, howto)) |
1550 | arm_emit_base_file_entry (info, output_bfd, input_section, rel->r_vaddr); | |
1551 | } | |
d70910e8 | 1552 | |
252b5132 RH |
1553 | #if 1 /* THUMBEXTENSION */ |
1554 | if (done) | |
1555 | rstat = bfd_reloc_ok; | |
17505c5c | 1556 | #ifndef ARM_WINCE |
252b5132 RH |
1557 | /* Only perform this fix during the final link, not a relocatable link. nickc@cygnus.com */ |
1558 | else if (! info->relocateable | |
1559 | && howto->type == ARM_THUMB23) | |
1560 | { | |
1561 | /* This is pretty much a copy of what the default | |
1562 | _bfd_final_link_relocate and _bfd_relocate_contents | |
1563 | routines do to perform a relocation, with special | |
1564 | processing for the split addressing of the Thumb BL | |
1565 | instruction. Again, it would probably be simpler adding a | |
1566 | ThumbBRANCH23 specific macro expansion into the default | |
1567 | code. */ | |
d70910e8 | 1568 | |
252b5132 | 1569 | bfd_vma address = rel->r_vaddr - input_section->vma; |
d70910e8 | 1570 | |
252b5132 RH |
1571 | if (address > input_section->_raw_size) |
1572 | rstat = bfd_reloc_outofrange; | |
1573 | else | |
1574 | { | |
1575 | bfd_vma relocation = val + addend; | |
1576 | int size = bfd_get_reloc_size (howto); | |
1577 | boolean overflow = false; | |
1578 | bfd_byte * location = contents + address; | |
1579 | bfd_vma x = bfd_get_32 (input_bfd, location); | |
1580 | bfd_vma src_mask = 0x007FFFFE; | |
1581 | bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1; | |
1582 | bfd_signed_vma reloc_signed_min = ~reloc_signed_max; | |
1583 | bfd_vma check; | |
1584 | bfd_signed_vma signed_check; | |
1585 | bfd_vma add; | |
1586 | bfd_signed_vma signed_add; | |
1587 | ||
1588 | BFD_ASSERT (size == 4); | |
d70910e8 | 1589 | |
252b5132 RH |
1590 | /* howto->pc_relative should be TRUE for type 14 BRANCH23 */ |
1591 | relocation -= (input_section->output_section->vma | |
1592 | + input_section->output_offset); | |
d70910e8 | 1593 | |
252b5132 RH |
1594 | /* howto->pcrel_offset should be TRUE for type 14 BRANCH23 */ |
1595 | relocation -= address; | |
d70910e8 KH |
1596 | |
1597 | /* No need to negate the relocation with BRANCH23. */ | |
252b5132 RH |
1598 | /* howto->complain_on_overflow == complain_overflow_signed for BRANCH23. */ |
1599 | /* howto->rightshift == 1 */ | |
1600 | /* Drop unwanted bits from the value we are relocating to. */ | |
d70910e8 | 1601 | |
252b5132 | 1602 | check = relocation >> howto->rightshift; |
d70910e8 | 1603 | |
252b5132 RH |
1604 | /* If this is a signed value, the rightshift just dropped |
1605 | leading 1 bits (assuming twos complement). */ | |
1606 | if ((bfd_signed_vma) relocation >= 0) | |
1607 | signed_check = check; | |
1608 | else | |
1609 | signed_check = (check | |
1610 | | ((bfd_vma) - 1 | |
1611 | & ~((bfd_vma) - 1 >> howto->rightshift))); | |
d70910e8 | 1612 | |
252b5132 RH |
1613 | /* Get the value from the object file. */ |
1614 | if (bfd_big_endian (input_bfd)) | |
1615 | { | |
1616 | add = (((x) & 0x07ff0000) >> 4) | (((x) & 0x7ff) << 1); | |
1617 | } | |
1618 | else | |
1619 | { | |
1620 | add = ((((x) & 0x7ff) << 12) | (((x) & 0x07ff0000) >> 15)); | |
1621 | } | |
1622 | ||
1623 | /* Get the value from the object file with an appropriate sign. | |
1624 | The expression involving howto->src_mask isolates the upper | |
1625 | bit of src_mask. If that bit is set in the value we are | |
1626 | adding, it is negative, and we subtract out that number times | |
1627 | two. If src_mask includes the highest possible bit, then we | |
1628 | can not get the upper bit, but that does not matter since | |
1629 | signed_add needs no adjustment to become negative in that | |
1630 | case. */ | |
d70910e8 | 1631 | |
252b5132 | 1632 | signed_add = add; |
d70910e8 | 1633 | |
252b5132 RH |
1634 | if ((add & (((~ src_mask) >> 1) & src_mask)) != 0) |
1635 | signed_add -= (((~ src_mask) >> 1) & src_mask) << 1; | |
d70910e8 | 1636 | |
252b5132 RH |
1637 | /* Add the value from the object file, shifted so that it is a |
1638 | straight number. */ | |
1639 | /* howto->bitpos == 0 */ | |
d70910e8 | 1640 | |
252b5132 RH |
1641 | signed_check += signed_add; |
1642 | relocation += signed_add; | |
1643 | ||
1644 | BFD_ASSERT (howto->complain_on_overflow == complain_overflow_signed); | |
1645 | ||
1646 | /* Assumes two's complement. */ | |
1647 | if ( signed_check > reloc_signed_max | |
1648 | || signed_check < reloc_signed_min) | |
1649 | overflow = true; | |
d70910e8 | 1650 | |
252b5132 | 1651 | /* Put RELOCATION into the correct bits: */ |
d70910e8 | 1652 | |
252b5132 RH |
1653 | if (bfd_big_endian (input_bfd)) |
1654 | { | |
1655 | relocation = (((relocation & 0xffe) >> 1) | ((relocation << 4) & 0x07ff0000)); | |
1656 | } | |
1657 | else | |
1658 | { | |
1659 | relocation = (((relocation & 0xffe) << 15) | ((relocation >> 12) & 0x7ff)); | |
1660 | } | |
d70910e8 | 1661 | |
252b5132 RH |
1662 | /* Add RELOCATION to the correct bits of X: */ |
1663 | x = ((x & ~howto->dst_mask) | relocation); | |
1664 | ||
1665 | /* Put the relocated value back in the object file: */ | |
1666 | bfd_put_32 (input_bfd, x, location); | |
1667 | ||
1668 | rstat = overflow ? bfd_reloc_overflow : bfd_reloc_ok; | |
1669 | } | |
1670 | } | |
17505c5c | 1671 | #endif |
252b5132 RH |
1672 | else |
1673 | #endif /* THUMBEXTENSION */ | |
1674 | rstat = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
1675 | contents, | |
1676 | rel->r_vaddr - input_section->vma, | |
1677 | val, addend); | |
1678 | #if 1 /* THUMBEXTENSION */ | |
d70910e8 | 1679 | /* FIXME: |
252b5132 RH |
1680 | Is this the best way to fix up thumb addresses? krk@cygnus.com |
1681 | Probably not, but it works, and if it works it don't need fixing! nickc@cygnus.com */ | |
1682 | /* Only perform this fix during the final link, not a relocatable link. nickc@cygnus.com */ | |
1683 | if (! info->relocateable | |
b44267fd | 1684 | && (rel->r_type == ARM_32 || rel->r_type == ARM_RVA32)) |
252b5132 RH |
1685 | { |
1686 | /* Determine if we need to set the bottom bit of a relocated address | |
1687 | because the address is the address of a Thumb code symbol. */ | |
d70910e8 | 1688 | |
252b5132 | 1689 | int patchit = false; |
d70910e8 | 1690 | |
252b5132 RH |
1691 | if (h != NULL |
1692 | && ( h->class == C_THUMBSTATFUNC | |
1693 | || h->class == C_THUMBEXTFUNC)) | |
1694 | { | |
1695 | patchit = true; | |
1696 | } | |
1697 | else if (sym != NULL | |
1698 | && sym->n_scnum > N_UNDEF) | |
1699 | { | |
1700 | /* No hash entry - use the symbol instead. */ | |
1701 | ||
1702 | if ( sym->n_sclass == C_THUMBSTATFUNC | |
1703 | || sym->n_sclass == C_THUMBEXTFUNC) | |
1704 | patchit = true; | |
1705 | } | |
1706 | ||
1707 | if (patchit) | |
1708 | { | |
1709 | bfd_byte * location = contents + rel->r_vaddr - input_section->vma; | |
1710 | bfd_vma x = bfd_get_32 (input_bfd, location); | |
1711 | ||
1712 | bfd_put_32 (input_bfd, x | 1, location); | |
1713 | } | |
1714 | } | |
d70910e8 KH |
1715 | #endif /* THUMBEXTENSION */ |
1716 | ||
252b5132 RH |
1717 | switch (rstat) |
1718 | { | |
1719 | default: | |
1720 | abort (); | |
1721 | case bfd_reloc_ok: | |
1722 | break; | |
1723 | case bfd_reloc_outofrange: | |
1724 | (*_bfd_error_handler) | |
1725 | (_("%s: bad reloc address 0x%lx in section `%s'"), | |
1726 | bfd_get_filename (input_bfd), | |
1727 | (unsigned long) rel->r_vaddr, | |
1728 | bfd_get_section_name (input_bfd, input_section)); | |
1729 | return false; | |
1730 | case bfd_reloc_overflow: | |
1731 | { | |
1732 | const char *name; | |
1733 | char buf[SYMNMLEN + 1]; | |
1734 | ||
1735 | if (symndx == -1) | |
1736 | name = "*ABS*"; | |
1737 | else if (h != NULL) | |
1738 | name = h->root.root.string; | |
1739 | else | |
1740 | { | |
1741 | name = _bfd_coff_internal_syment_name (input_bfd, sym, buf); | |
1742 | if (name == NULL) | |
1743 | return false; | |
1744 | } | |
1745 | ||
1746 | if (! ((*info->callbacks->reloc_overflow) | |
1747 | (info, name, howto->name, (bfd_vma) 0, input_bfd, | |
1748 | input_section, rel->r_vaddr - input_section->vma))) | |
1749 | return false; | |
1750 | } | |
1751 | } | |
1752 | } | |
1753 | ||
1754 | return true; | |
1755 | } | |
1756 | ||
e049a0de ILT |
1757 | #ifndef COFF_IMAGE_WITH_PE |
1758 | ||
252b5132 | 1759 | boolean |
d70910e8 | 1760 | bfd_arm_allocate_interworking_sections (info) |
252b5132 RH |
1761 | struct bfd_link_info * info; |
1762 | { | |
1763 | asection * s; | |
1764 | bfd_byte * foo; | |
1765 | struct coff_arm_link_hash_table * globals; | |
1766 | #if 0 | |
1767 | static char test_char = '1'; | |
1768 | #endif | |
1769 | ||
1770 | globals = coff_arm_hash_table (info); | |
d70910e8 | 1771 | |
252b5132 RH |
1772 | BFD_ASSERT (globals != NULL); |
1773 | ||
1774 | if (globals->arm_glue_size != 0) | |
1775 | { | |
1776 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
d70910e8 | 1777 | |
252b5132 RH |
1778 | s = bfd_get_section_by_name |
1779 | (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME); | |
1780 | ||
1781 | BFD_ASSERT (s != NULL); | |
d70910e8 | 1782 | |
252b5132 RH |
1783 | foo = (bfd_byte *) bfd_alloc |
1784 | (globals->bfd_of_glue_owner, globals->arm_glue_size); | |
1785 | #if 0 | |
1786 | memset (foo, test_char, globals->arm_glue_size); | |
1787 | #endif | |
d70910e8 | 1788 | |
252b5132 RH |
1789 | s->_raw_size = s->_cooked_size = globals->arm_glue_size; |
1790 | s->contents = foo; | |
1791 | } | |
1792 | ||
1793 | if (globals->thumb_glue_size != 0) | |
1794 | { | |
1795 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
d70910e8 | 1796 | |
252b5132 RH |
1797 | s = bfd_get_section_by_name |
1798 | (globals->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME); | |
1799 | ||
1800 | BFD_ASSERT (s != NULL); | |
d70910e8 | 1801 | |
252b5132 RH |
1802 | foo = (bfd_byte *) bfd_alloc |
1803 | (globals->bfd_of_glue_owner, globals->thumb_glue_size); | |
1804 | #if 0 | |
1805 | memset (foo, test_char, globals->thumb_glue_size); | |
1806 | #endif | |
d70910e8 | 1807 | |
252b5132 RH |
1808 | s->_raw_size = s->_cooked_size = globals->thumb_glue_size; |
1809 | s->contents = foo; | |
1810 | } | |
1811 | ||
1812 | return true; | |
1813 | } | |
1814 | ||
1815 | static void | |
1816 | record_arm_to_thumb_glue (info, h) | |
1817 | struct bfd_link_info * info; | |
1818 | struct coff_link_hash_entry * h; | |
1819 | { | |
1820 | const char * name = h->root.root.string; | |
1821 | register asection * s; | |
1822 | char * tmp_name; | |
1823 | struct coff_link_hash_entry * myh; | |
1824 | struct coff_arm_link_hash_table * globals; | |
1825 | ||
1826 | globals = coff_arm_hash_table (info); | |
1827 | ||
1828 | BFD_ASSERT (globals != NULL); | |
1829 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
1830 | ||
1831 | s = bfd_get_section_by_name | |
1832 | (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME); | |
1833 | ||
1834 | BFD_ASSERT (s != NULL); | |
1835 | ||
1836 | tmp_name = ((char *) | |
1837 | bfd_malloc (strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1)); | |
1838 | ||
1839 | BFD_ASSERT (tmp_name); | |
1840 | ||
1841 | sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name); | |
d70910e8 | 1842 | |
252b5132 RH |
1843 | myh = coff_link_hash_lookup |
1844 | (coff_hash_table (info), tmp_name, false, false, true); | |
d70910e8 | 1845 | |
252b5132 RH |
1846 | if (myh != NULL) |
1847 | { | |
1848 | free (tmp_name); | |
1849 | return; /* we've already seen this guy */ | |
1850 | } | |
1851 | ||
1852 | /* The only trick here is using globals->arm_glue_size as the value. Even | |
1853 | though the section isn't allocated yet, this is where we will be putting | |
1854 | it. */ | |
1855 | ||
1856 | bfd_coff_link_add_one_symbol (info, globals->bfd_of_glue_owner, tmp_name, | |
d70910e8 | 1857 | BSF_GLOBAL, |
252b5132 | 1858 | s, globals->arm_glue_size + 1, |
d70910e8 | 1859 | NULL, true, false, |
252b5132 | 1860 | (struct bfd_link_hash_entry **) & myh); |
d70910e8 | 1861 | |
252b5132 | 1862 | free (tmp_name); |
d70910e8 | 1863 | |
252b5132 RH |
1864 | globals->arm_glue_size += ARM2THUMB_GLUE_SIZE; |
1865 | ||
1866 | return; | |
1867 | } | |
1868 | ||
1869 | static void | |
1870 | record_thumb_to_arm_glue (info, h) | |
1871 | struct bfd_link_info * info; | |
1872 | struct coff_link_hash_entry * h; | |
1873 | { | |
1874 | const char * name = h->root.root.string; | |
1875 | register asection * s; | |
1876 | char * tmp_name; | |
1877 | struct coff_link_hash_entry * myh; | |
1878 | struct coff_arm_link_hash_table * globals; | |
1879 | ||
252b5132 | 1880 | globals = coff_arm_hash_table (info); |
d70910e8 | 1881 | |
252b5132 RH |
1882 | BFD_ASSERT (globals != NULL); |
1883 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
1884 | ||
1885 | s = bfd_get_section_by_name | |
1886 | (globals->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME); | |
1887 | ||
1888 | BFD_ASSERT (s != NULL); | |
1889 | ||
1890 | tmp_name = (char *) bfd_malloc (strlen (name) + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1); | |
1891 | ||
1892 | BFD_ASSERT (tmp_name); | |
1893 | ||
1894 | sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name); | |
1895 | ||
1896 | myh = coff_link_hash_lookup | |
1897 | (coff_hash_table (info), tmp_name, false, false, true); | |
d70910e8 | 1898 | |
252b5132 RH |
1899 | if (myh != NULL) |
1900 | { | |
1901 | free (tmp_name); | |
1902 | return; /* we've already seen this guy */ | |
1903 | } | |
1904 | ||
1905 | bfd_coff_link_add_one_symbol (info, globals->bfd_of_glue_owner, tmp_name, | |
1906 | BSF_GLOBAL, s, globals->thumb_glue_size + 1, | |
d70910e8 | 1907 | NULL, true, false, |
252b5132 | 1908 | (struct bfd_link_hash_entry **) & myh); |
d70910e8 | 1909 | |
252b5132 RH |
1910 | /* If we mark it 'thumb', the disassembler will do a better job. */ |
1911 | myh->class = C_THUMBEXTFUNC; | |
1912 | ||
1913 | free (tmp_name); | |
1914 | ||
1915 | /* Allocate another symbol to mark where we switch to arm mode. */ | |
d70910e8 | 1916 | |
252b5132 RH |
1917 | #define CHANGE_TO_ARM "__%s_change_to_arm" |
1918 | #define BACK_FROM_ARM "__%s_back_from_arm" | |
d70910e8 | 1919 | |
252b5132 | 1920 | tmp_name = (char *) bfd_malloc (strlen (name) + strlen (CHANGE_TO_ARM) + 1); |
d70910e8 | 1921 | |
252b5132 | 1922 | BFD_ASSERT (tmp_name); |
d70910e8 | 1923 | |
252b5132 RH |
1924 | sprintf (tmp_name, globals->support_old_code ? BACK_FROM_ARM : CHANGE_TO_ARM, name); |
1925 | ||
1926 | myh = NULL; | |
d70910e8 | 1927 | |
252b5132 RH |
1928 | bfd_coff_link_add_one_symbol (info, globals->bfd_of_glue_owner, tmp_name, |
1929 | BSF_LOCAL, s, globals->thumb_glue_size | |
1930 | + (globals->support_old_code ? 8 : 4), | |
d70910e8 | 1931 | NULL, true, false, |
252b5132 RH |
1932 | (struct bfd_link_hash_entry **) & myh); |
1933 | ||
d70910e8 KH |
1934 | free (tmp_name); |
1935 | ||
252b5132 RH |
1936 | globals->thumb_glue_size += THUMB2ARM_GLUE_SIZE; |
1937 | ||
1938 | return; | |
1939 | } | |
1940 | ||
1941 | /* Select a BFD to be used to hold the sections used by the glue code. | |
1942 | This function is called from the linker scripts in ld/emultempl/ | |
1943 | {armcoff/pe}.em */ | |
e049a0de | 1944 | |
252b5132 RH |
1945 | boolean |
1946 | bfd_arm_get_bfd_for_interworking (abfd, info) | |
1947 | bfd * abfd; | |
1948 | struct bfd_link_info * info; | |
1949 | { | |
1950 | struct coff_arm_link_hash_table * globals; | |
1951 | flagword flags; | |
1952 | asection * sec; | |
d70910e8 | 1953 | |
252b5132 RH |
1954 | /* If we are only performing a partial link do not bother |
1955 | getting a bfd to hold the glue. */ | |
1956 | if (info->relocateable) | |
1957 | return true; | |
d70910e8 | 1958 | |
252b5132 | 1959 | globals = coff_arm_hash_table (info); |
d70910e8 | 1960 | |
252b5132 RH |
1961 | BFD_ASSERT (globals != NULL); |
1962 | ||
1963 | if (globals->bfd_of_glue_owner != NULL) | |
1964 | return true; | |
d70910e8 | 1965 | |
252b5132 | 1966 | sec = bfd_get_section_by_name (abfd, ARM2THUMB_GLUE_SECTION_NAME); |
d70910e8 KH |
1967 | |
1968 | if (sec == NULL) | |
252b5132 | 1969 | { |
ba3d4249 | 1970 | flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY; |
d70910e8 | 1971 | |
252b5132 | 1972 | sec = bfd_make_section (abfd, ARM2THUMB_GLUE_SECTION_NAME); |
d70910e8 | 1973 | |
252b5132 RH |
1974 | if (sec == NULL |
1975 | || ! bfd_set_section_flags (abfd, sec, flags) | |
1976 | || ! bfd_set_section_alignment (abfd, sec, 2)) | |
1977 | return false; | |
1978 | } | |
1979 | ||
1980 | sec = bfd_get_section_by_name (abfd, THUMB2ARM_GLUE_SECTION_NAME); | |
1981 | ||
d70910e8 | 1982 | if (sec == NULL) |
252b5132 | 1983 | { |
ba3d4249 | 1984 | flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY; |
d70910e8 | 1985 | |
252b5132 | 1986 | sec = bfd_make_section (abfd, THUMB2ARM_GLUE_SECTION_NAME); |
d70910e8 | 1987 | |
252b5132 RH |
1988 | if (sec == NULL |
1989 | || ! bfd_set_section_flags (abfd, sec, flags) | |
1990 | || ! bfd_set_section_alignment (abfd, sec, 2)) | |
1991 | return false; | |
1992 | } | |
d70910e8 | 1993 | |
252b5132 RH |
1994 | /* Save the bfd for later use. */ |
1995 | globals->bfd_of_glue_owner = abfd; | |
d70910e8 | 1996 | |
252b5132 RH |
1997 | return true; |
1998 | } | |
1999 | ||
2000 | boolean | |
2001 | bfd_arm_process_before_allocation (abfd, info, support_old_code) | |
2002 | bfd * abfd; | |
2003 | struct bfd_link_info * info; | |
2004 | int support_old_code; | |
2005 | { | |
2006 | asection * sec; | |
2007 | struct coff_arm_link_hash_table * globals; | |
2008 | ||
2009 | /* If we are only performing a partial link do not bother | |
2010 | to construct any glue. */ | |
2011 | if (info->relocateable) | |
2012 | return true; | |
d70910e8 | 2013 | |
252b5132 RH |
2014 | /* Here we have a bfd that is to be included on the link. We have a hook |
2015 | to do reloc rummaging, before section sizes are nailed down. */ | |
2016 | ||
2017 | _bfd_coff_get_external_symbols (abfd); | |
2018 | ||
2019 | globals = coff_arm_hash_table (info); | |
d70910e8 | 2020 | |
252b5132 RH |
2021 | BFD_ASSERT (globals != NULL); |
2022 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
2023 | ||
2024 | globals->support_old_code = support_old_code; | |
d70910e8 | 2025 | |
252b5132 RH |
2026 | /* Rummage around all the relocs and map the glue vectors. */ |
2027 | sec = abfd->sections; | |
2028 | ||
2029 | if (sec == NULL) | |
2030 | return true; | |
2031 | ||
2032 | for (; sec != NULL; sec = sec->next) | |
2033 | { | |
2034 | struct internal_reloc * i; | |
2035 | struct internal_reloc * rel; | |
2036 | ||
d70910e8 | 2037 | if (sec->reloc_count == 0) |
252b5132 RH |
2038 | continue; |
2039 | ||
2040 | /* Load the relocs. */ | |
d70910e8 KH |
2041 | /* FIXME: there may be a storage leak here. */ |
2042 | ||
252b5132 | 2043 | i = _bfd_coff_read_internal_relocs (abfd, sec, 1, 0, 0, 0); |
d70910e8 | 2044 | |
252b5132 RH |
2045 | BFD_ASSERT (i != 0); |
2046 | ||
d70910e8 | 2047 | for (rel = i; rel < i + sec->reloc_count; ++rel) |
252b5132 RH |
2048 | { |
2049 | unsigned short r_type = rel->r_type; | |
86033394 | 2050 | long symndx; |
252b5132 RH |
2051 | struct coff_link_hash_entry * h; |
2052 | ||
2053 | symndx = rel->r_symndx; | |
2054 | ||
d70910e8 | 2055 | /* If the relocation is not against a symbol it cannot concern us. */ |
252b5132 RH |
2056 | if (symndx == -1) |
2057 | continue; | |
2058 | ||
17505c5c | 2059 | /* If the index is outside of the range of our table, something has gone wrong. */ |
af74ae99 NC |
2060 | if (symndx >= obj_conv_table_size (abfd)) |
2061 | { | |
2062 | _bfd_error_handler (_("%s: illegal symbol index in reloc: %d"), | |
2063 | bfd_get_filename (abfd), symndx); | |
2064 | continue; | |
2065 | } | |
d70910e8 | 2066 | |
252b5132 RH |
2067 | h = obj_coff_sym_hashes (abfd)[symndx]; |
2068 | ||
2069 | /* If the relocation is against a static symbol it must be within | |
2070 | the current section and so cannot be a cross ARM/Thumb relocation. */ | |
2071 | if (h == NULL) | |
2072 | continue; | |
2073 | ||
2074 | switch (r_type) | |
2075 | { | |
2076 | case ARM_26: | |
2077 | /* This one is a call from arm code. We need to look up | |
2078 | the target of the call. If it is a thumb target, we | |
2079 | insert glue. */ | |
d70910e8 | 2080 | |
252b5132 RH |
2081 | if (h->class == C_THUMBEXTFUNC) |
2082 | record_arm_to_thumb_glue (info, h); | |
2083 | break; | |
d70910e8 | 2084 | |
17505c5c | 2085 | #ifndef ARM_WINCE |
252b5132 RH |
2086 | case ARM_THUMB23: |
2087 | /* This one is a call from thumb code. We used to look | |
2088 | for ARM_THUMB9 and ARM_THUMB12 as well. We need to look | |
2089 | up the target of the call. If it is an arm target, we | |
2090 | insert glue. If the symbol does not exist it will be | |
2091 | given a class of C_EXT and so we will generate a stub | |
2092 | for it. This is not really a problem, since the link | |
2093 | is doomed anyway. */ | |
2094 | ||
2095 | switch (h->class) | |
2096 | { | |
2097 | case C_EXT: | |
2098 | case C_STAT: | |
2099 | case C_LABEL: | |
2100 | record_thumb_to_arm_glue (info, h); | |
2101 | break; | |
2102 | default: | |
2103 | ; | |
2104 | } | |
2105 | break; | |
17505c5c | 2106 | #endif |
d70910e8 | 2107 | |
252b5132 RH |
2108 | default: |
2109 | break; | |
2110 | } | |
2111 | } | |
2112 | } | |
2113 | ||
2114 | return true; | |
2115 | } | |
2116 | ||
e049a0de ILT |
2117 | #endif /* ! defined (COFF_IMAGE_WITH_PE) */ |
2118 | ||
252b5132 RH |
2119 | #define coff_bfd_reloc_type_lookup coff_arm_reloc_type_lookup |
2120 | #define coff_relocate_section coff_arm_relocate_section | |
2121 | #define coff_bfd_is_local_label_name coff_arm_is_local_label_name | |
2122 | #define coff_adjust_symndx coff_arm_adjust_symndx | |
2123 | #define coff_link_output_has_begun coff_arm_link_output_has_begun | |
2124 | #define coff_final_link_postscript coff_arm_final_link_postscript | |
2125 | #define coff_bfd_merge_private_bfd_data coff_arm_merge_private_bfd_data | |
2126 | #define coff_bfd_print_private_bfd_data coff_arm_print_private_bfd_data | |
2127 | #define coff_bfd_set_private_flags _bfd_coff_arm_set_private_flags | |
2128 | #define coff_bfd_copy_private_bfd_data coff_arm_copy_private_bfd_data | |
2129 | #define coff_bfd_link_hash_table_create coff_arm_link_hash_table_create | |
2130 | ||
252b5132 RH |
2131 | /* When doing a relocateable link, we want to convert ARM26 relocs |
2132 | into ARM26D relocs. */ | |
2133 | ||
2134 | static boolean | |
2135 | coff_arm_adjust_symndx (obfd, info, ibfd, sec, irel, adjustedp) | |
5f771d47 ILT |
2136 | bfd *obfd ATTRIBUTE_UNUSED; |
2137 | struct bfd_link_info *info ATTRIBUTE_UNUSED; | |
252b5132 RH |
2138 | bfd *ibfd; |
2139 | asection *sec; | |
2140 | struct internal_reloc *irel; | |
2141 | boolean *adjustedp; | |
2142 | { | |
2143 | if (irel->r_type == 3) | |
2144 | { | |
2145 | struct coff_link_hash_entry *h; | |
2146 | ||
2147 | h = obj_coff_sym_hashes (ibfd)[irel->r_symndx]; | |
2148 | if (h != NULL | |
2149 | && (h->root.type == bfd_link_hash_defined | |
2150 | || h->root.type == bfd_link_hash_defweak) | |
2151 | && h->root.u.def.section->output_section == sec->output_section) | |
2152 | irel->r_type = 7; | |
2153 | } | |
2154 | *adjustedp = false; | |
2155 | return true; | |
2156 | } | |
2157 | ||
2158 | /* Called when merging the private data areas of two BFDs. | |
2159 | This is important as it allows us to detect if we are | |
2160 | attempting to merge binaries compiled for different ARM | |
2161 | targets, eg different CPUs or differents APCS's. */ | |
2162 | ||
2163 | static boolean | |
2164 | coff_arm_merge_private_bfd_data (ibfd, obfd) | |
2165 | bfd * ibfd; | |
2166 | bfd * obfd; | |
2167 | { | |
2168 | BFD_ASSERT (ibfd != NULL && obfd != NULL); | |
2169 | ||
2170 | if (ibfd == obfd) | |
2171 | return true; | |
2172 | ||
2173 | /* If the two formats are different we cannot merge anything. | |
2174 | This is not an error, since it is permissable to change the | |
2175 | input and output formats. */ | |
2176 | if ( ibfd->xvec->flavour != bfd_target_coff_flavour | |
2177 | || obfd->xvec->flavour != bfd_target_coff_flavour) | |
2178 | return true; | |
2179 | ||
2180 | /* Verify that the APCS is the same for the two BFDs */ | |
2181 | if (APCS_SET (ibfd)) | |
2182 | { | |
2183 | if (APCS_SET (obfd)) | |
2184 | { | |
2185 | /* If the src and dest have different APCS flag bits set, fail. */ | |
2186 | if (APCS_26_FLAG (obfd) != APCS_26_FLAG (ibfd)) | |
2187 | { | |
2188 | _bfd_error_handler | |
2189 | /* xgettext: c-format */ | |
2190 | (_("%s: ERROR: compiled for APCS-%d whereas target %s uses APCS-%d"), | |
2191 | bfd_get_filename (ibfd), APCS_26_FLAG (ibfd) ? 26 : 32, | |
2192 | bfd_get_filename (obfd), APCS_26_FLAG (obfd) ? 26 : 32 | |
2193 | ); | |
2194 | ||
2195 | bfd_set_error (bfd_error_wrong_format); | |
2196 | return false; | |
2197 | } | |
d70910e8 | 2198 | |
252b5132 RH |
2199 | if (APCS_FLOAT_FLAG (obfd) != APCS_FLOAT_FLAG (ibfd)) |
2200 | { | |
2201 | const char *msg; | |
2202 | ||
2203 | if (APCS_FLOAT_FLAG (ibfd)) | |
2204 | /* xgettext: c-format */ | |
2205 | msg = _("%s: ERROR: passes floats in float registers whereas target %s uses integer registers"); | |
2206 | else | |
2207 | /* xgettext: c-format */ | |
2208 | msg = _("%s: ERROR: passes floats in integer registers whereas target %s uses float registers"); | |
d70910e8 | 2209 | |
252b5132 RH |
2210 | _bfd_error_handler (msg, bfd_get_filename (ibfd), |
2211 | bfd_get_filename (obfd)); | |
2212 | ||
2213 | bfd_set_error (bfd_error_wrong_format); | |
2214 | return false; | |
2215 | } | |
d70910e8 | 2216 | |
252b5132 RH |
2217 | if (PIC_FLAG (obfd) != PIC_FLAG (ibfd)) |
2218 | { | |
2219 | const char * msg; | |
2220 | ||
2221 | if (PIC_FLAG (ibfd)) | |
2222 | /* xgettext: c-format */ | |
2223 | msg = _("%s: ERROR: compiled as position independent code, whereas target %s is absolute position"); | |
2224 | else | |
2225 | /* xgettext: c-format */ | |
2226 | msg = _("%s: ERROR: compiled as absolute position code, whereas target %s is position independent"); | |
2227 | _bfd_error_handler (msg, bfd_get_filename (ibfd), | |
2228 | bfd_get_filename (obfd)); | |
2229 | ||
2230 | bfd_set_error (bfd_error_wrong_format); | |
2231 | return false; | |
2232 | } | |
2233 | } | |
2234 | else | |
2235 | { | |
2236 | SET_APCS_FLAGS (obfd, APCS_26_FLAG (ibfd) | APCS_FLOAT_FLAG (ibfd) | PIC_FLAG (ibfd)); | |
d70910e8 | 2237 | |
252b5132 RH |
2238 | /* Set up the arch and fields as well as these are probably wrong. */ |
2239 | bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd)); | |
2240 | } | |
2241 | } | |
2242 | ||
2243 | /* Check the interworking support. */ | |
2244 | if (INTERWORK_SET (ibfd)) | |
2245 | { | |
2246 | if (INTERWORK_SET (obfd)) | |
2247 | { | |
2248 | /* If the src and dest differ in their interworking issue a warning. */ | |
2249 | if (INTERWORK_FLAG (obfd) != INTERWORK_FLAG (ibfd)) | |
2250 | { | |
2251 | const char * msg; | |
2252 | ||
2253 | if (INTERWORK_FLAG (ibfd)) | |
2254 | /* xgettext: c-format */ | |
2255 | msg = _("Warning: input file %s supports interworking, whereas %s does not."); | |
2256 | else | |
2257 | /* xgettext: c-format */ | |
2258 | msg = _("Warning: input file %s does not support interworking, whereas %s does."); | |
d70910e8 | 2259 | |
252b5132 RH |
2260 | _bfd_error_handler (msg, bfd_get_filename (ibfd), |
2261 | bfd_get_filename (obfd)); | |
2262 | } | |
2263 | } | |
2264 | else | |
2265 | { | |
2266 | SET_INTERWORK_FLAG (obfd, INTERWORK_FLAG (ibfd)); | |
2267 | } | |
2268 | } | |
2269 | ||
2270 | return true; | |
2271 | } | |
2272 | ||
252b5132 RH |
2273 | /* Display the flags field. */ |
2274 | ||
2275 | static boolean | |
2276 | coff_arm_print_private_bfd_data (abfd, ptr) | |
2277 | bfd * abfd; | |
2278 | PTR ptr; | |
2279 | { | |
2280 | FILE * file = (FILE *) ptr; | |
d70910e8 | 2281 | |
252b5132 | 2282 | BFD_ASSERT (abfd != NULL && ptr != NULL); |
d70910e8 | 2283 | |
252b5132 RH |
2284 | /* xgettext:c-format */ |
2285 | fprintf (file, _("private flags = %x:"), coff_data (abfd)->flags); | |
d70910e8 | 2286 | |
252b5132 RH |
2287 | if (APCS_SET (abfd)) |
2288 | { | |
2289 | /* xgettext: APCS is ARM Prodecure Call Standard, it should not be translated. */ | |
2290 | fprintf (file, " [APCS-%d]", APCS_26_FLAG (abfd) ? 26 : 32); | |
2291 | ||
2292 | if (APCS_FLOAT_FLAG (abfd)) | |
2293 | fprintf (file, _(" [floats passed in float registers]")); | |
2294 | else | |
2295 | fprintf (file, _(" [floats passed in integer registers]")); | |
2296 | ||
2297 | if (PIC_FLAG (abfd)) | |
2298 | fprintf (file, _(" [position independent]")); | |
2299 | else | |
2300 | fprintf (file, _(" [absolute position]")); | |
2301 | } | |
d70910e8 | 2302 | |
252b5132 RH |
2303 | if (! INTERWORK_SET (abfd)) |
2304 | fprintf (file, _(" [interworking flag not initialised]")); | |
2305 | else if (INTERWORK_FLAG (abfd)) | |
2306 | fprintf (file, _(" [interworking supported]")); | |
2307 | else | |
2308 | fprintf (file, _(" [interworking not supported]")); | |
d70910e8 | 2309 | |
252b5132 | 2310 | fputc ('\n', file); |
d70910e8 | 2311 | |
252b5132 RH |
2312 | return true; |
2313 | } | |
2314 | ||
252b5132 RH |
2315 | /* Copies the given flags into the coff_tdata.flags field. |
2316 | Typically these flags come from the f_flags[] field of | |
2317 | the COFF filehdr structure, which contains important, | |
2318 | target specific information. | |
2319 | Note: Although this function is static, it is explicitly | |
2320 | called from both coffcode.h and peicode.h. */ | |
2321 | ||
2322 | static boolean | |
2323 | _bfd_coff_arm_set_private_flags (abfd, flags) | |
2324 | bfd * abfd; | |
2325 | flagword flags; | |
2326 | { | |
2327 | flagword flag; | |
2328 | ||
2329 | BFD_ASSERT (abfd != NULL); | |
2330 | ||
2331 | flag = (flags & F_APCS26) ? F_APCS_26 : 0; | |
d70910e8 | 2332 | |
252b5132 RH |
2333 | /* Make sure that the APCS field has not been initialised to the opposite |
2334 | value. */ | |
2335 | if (APCS_SET (abfd) | |
2336 | && ( (APCS_26_FLAG (abfd) != flag) | |
2337 | || (APCS_FLOAT_FLAG (abfd) != (flags & F_APCS_FLOAT)) | |
948221a8 | 2338 | || (PIC_FLAG (abfd) != (flags & F_PIC)) |
252b5132 RH |
2339 | )) |
2340 | return false; | |
2341 | ||
2342 | flag |= (flags & (F_APCS_FLOAT | F_PIC)); | |
d70910e8 | 2343 | |
252b5132 RH |
2344 | SET_APCS_FLAGS (abfd, flag); |
2345 | ||
2346 | flag = (flags & F_INTERWORK); | |
d70910e8 | 2347 | |
252b5132 RH |
2348 | /* If the BFD has already had its interworking flag set, but it |
2349 | is different from the value that we have been asked to set, | |
2350 | then assume that that merged code will not support interworking | |
2351 | and set the flag accordingly. */ | |
2352 | if (INTERWORK_SET (abfd) && (INTERWORK_FLAG (abfd) != flag)) | |
2353 | { | |
2354 | if (flag) | |
2355 | /* xgettext: c-format */ | |
2356 | _bfd_error_handler (_("Warning: Not setting interworking flag of %s, since it has already been specified as non-interworking"), | |
2357 | bfd_get_filename (abfd)); | |
2358 | else | |
2359 | /* xgettext: c-format */ | |
2360 | _bfd_error_handler (_("Warning: Clearing the interworking flag of %s due to outside request"), | |
2361 | bfd_get_filename (abfd)); | |
2362 | flag = 0; | |
2363 | } | |
2364 | ||
2365 | SET_INTERWORK_FLAG (abfd, flag); | |
2366 | ||
2367 | return true; | |
2368 | } | |
2369 | ||
252b5132 RH |
2370 | /* Copy the important parts of the target specific data |
2371 | from one instance of a BFD to another. */ | |
2372 | ||
2373 | static boolean | |
2374 | coff_arm_copy_private_bfd_data (src, dest) | |
2375 | bfd * src; | |
2376 | bfd * dest; | |
2377 | { | |
2378 | BFD_ASSERT (src != NULL && dest != NULL); | |
d70910e8 | 2379 | |
252b5132 RH |
2380 | if (src == dest) |
2381 | return true; | |
2382 | ||
2383 | /* If the destination is not in the same format as the source, do not do | |
2384 | the copy. */ | |
2385 | if (src->xvec != dest->xvec) | |
2386 | return true; | |
2387 | ||
2388 | /* copy the flags field */ | |
2389 | if (APCS_SET (src)) | |
2390 | { | |
2391 | if (APCS_SET (dest)) | |
2392 | { | |
2393 | /* If the src and dest have different APCS flag bits set, fail. */ | |
2394 | if (APCS_26_FLAG (dest) != APCS_26_FLAG (src)) | |
2395 | return false; | |
d70910e8 | 2396 | |
252b5132 RH |
2397 | if (APCS_FLOAT_FLAG (dest) != APCS_FLOAT_FLAG (src)) |
2398 | return false; | |
d70910e8 | 2399 | |
252b5132 RH |
2400 | if (PIC_FLAG (dest) != PIC_FLAG (src)) |
2401 | return false; | |
2402 | } | |
2403 | else | |
2404 | SET_APCS_FLAGS (dest, APCS_26_FLAG (src) | APCS_FLOAT_FLAG (src) | |
2405 | | PIC_FLAG (src)); | |
2406 | } | |
2407 | ||
2408 | if (INTERWORK_SET (src)) | |
2409 | { | |
2410 | if (INTERWORK_SET (dest)) | |
2411 | { | |
2412 | /* If the src and dest have different interworking flags then turn | |
2413 | off the interworking bit. */ | |
2414 | if (INTERWORK_FLAG (dest) != INTERWORK_FLAG (src)) | |
2415 | { | |
2416 | if (INTERWORK_FLAG (dest)) | |
2417 | { | |
2418 | /* xgettext:c-format */ | |
2419 | _bfd_error_handler (("Warning: Clearing the interworking bit of %s, because the non-interworking code in %s has been copied into it"), | |
2420 | bfd_get_filename (dest), | |
2421 | bfd_get_filename (src)); | |
2422 | } | |
d70910e8 | 2423 | |
252b5132 RH |
2424 | SET_INTERWORK_FLAG (dest, 0); |
2425 | } | |
2426 | } | |
2427 | else | |
2428 | { | |
2429 | SET_INTERWORK_FLAG (dest, INTERWORK_FLAG (src)); | |
2430 | } | |
2431 | } | |
2432 | ||
2433 | return true; | |
2434 | } | |
2435 | ||
2436 | /* Note: the definitions here of LOCAL_LABEL_PREFIX and USER_LABEL_PREIFX | |
c31c1f70 NC |
2437 | *must* match the definitions in gcc/config/arm/{coff|semi|aout}.h. */ |
2438 | #define LOCAL_LABEL_PREFIX "" | |
252b5132 RH |
2439 | #ifndef USER_LABEL_PREFIX |
2440 | #define USER_LABEL_PREFIX "_" | |
2441 | #endif | |
2442 | ||
f8111282 NC |
2443 | /* Like _bfd_coff_is_local_label_name, but |
2444 | a) test against USER_LABEL_PREFIX, to avoid stripping labels known to be | |
2445 | non-local. | |
2446 | b) Allow other prefixes than ".", e.g. an empty prefix would cause all | |
2447 | labels of the form Lxxx to be stripped. */ | |
252b5132 RH |
2448 | static boolean |
2449 | coff_arm_is_local_label_name (abfd, name) | |
5f771d47 | 2450 | bfd * abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
2451 | const char * name; |
2452 | { | |
252b5132 RH |
2453 | #ifdef USER_LABEL_PREFIX |
2454 | if (USER_LABEL_PREFIX[0] != 0) | |
2455 | { | |
2456 | if (strncmp (name, USER_LABEL_PREFIX, strlen (USER_LABEL_PREFIX)) == 0) | |
2457 | return false; | |
2458 | } | |
2459 | #endif | |
f8111282 NC |
2460 | |
2461 | #ifdef LOCAL_LABEL_PREFIX | |
2462 | /* If there is a prefix for local labels then look for this. | |
d70910e8 KH |
2463 | If the prefix exists, but it is empty, then ignore the test. */ |
2464 | ||
f8111282 | 2465 | if (LOCAL_LABEL_PREFIX[0] != 0) |
252b5132 | 2466 | { |
f8111282 | 2467 | int len = strlen (LOCAL_LABEL_PREFIX); |
d70910e8 | 2468 | |
f8111282 NC |
2469 | if (strncmp (name, LOCAL_LABEL_PREFIX, len) != 0) |
2470 | return false; | |
d70910e8 | 2471 | |
f8111282 NC |
2472 | /* Perform the checks below for the rest of the name. */ |
2473 | name += len; | |
252b5132 | 2474 | } |
f8111282 | 2475 | #endif |
d70910e8 | 2476 | |
f8111282 | 2477 | return name[0] == 'L'; |
252b5132 RH |
2478 | } |
2479 | ||
2480 | /* This piece of machinery exists only to guarantee that the bfd that holds | |
d70910e8 | 2481 | the glue section is written last. |
252b5132 RH |
2482 | |
2483 | This does depend on bfd_make_section attaching a new section to the | |
d70910e8 | 2484 | end of the section list for the bfd. |
252b5132 RH |
2485 | |
2486 | krk@cygnus.com */ | |
2487 | ||
2488 | static boolean | |
2489 | coff_arm_link_output_has_begun (sub, info) | |
2490 | bfd * sub; | |
2491 | struct coff_final_link_info * info; | |
2492 | { | |
2493 | return (sub->output_has_begun | |
2494 | || sub == coff_arm_hash_table (info->info)->bfd_of_glue_owner); | |
2495 | } | |
2496 | ||
2497 | static boolean | |
2498 | coff_arm_final_link_postscript (abfd, pfinfo) | |
5f771d47 | 2499 | bfd * abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
2500 | struct coff_final_link_info * pfinfo; |
2501 | { | |
2502 | struct coff_arm_link_hash_table * globals; | |
2503 | ||
2504 | globals = coff_arm_hash_table (pfinfo->info); | |
d70910e8 | 2505 | |
252b5132 | 2506 | BFD_ASSERT (globals != NULL); |
d70910e8 | 2507 | |
252b5132 RH |
2508 | if (globals->bfd_of_glue_owner != NULL) |
2509 | { | |
2510 | if (! _bfd_coff_link_input_bfd (pfinfo, globals->bfd_of_glue_owner)) | |
2511 | return false; | |
d70910e8 | 2512 | |
252b5132 RH |
2513 | globals->bfd_of_glue_owner->output_has_begun = true; |
2514 | } | |
d70910e8 | 2515 | |
252b5132 RH |
2516 | return true; |
2517 | } | |
2518 | ||
252b5132 RH |
2519 | #include "coffcode.h" |
2520 | ||
c3c89269 NC |
2521 | #ifndef TARGET_LITTLE_SYM |
2522 | #define TARGET_LITTLE_SYM armcoff_little_vec | |
252b5132 | 2523 | #endif |
c3c89269 NC |
2524 | #ifndef TARGET_LITTLE_NAME |
2525 | #define TARGET_LITTLE_NAME "coff-arm-little" | |
252b5132 | 2526 | #endif |
c3c89269 NC |
2527 | #ifndef TARGET_BIG_SYM |
2528 | #define TARGET_BIG_SYM armcoff_big_vec | |
252b5132 | 2529 | #endif |
c3c89269 NC |
2530 | #ifndef TARGET_BIG_NAME |
2531 | #define TARGET_BIG_NAME "coff-arm-big" | |
252b5132 | 2532 | #endif |
252b5132 | 2533 | |
c3c89269 NC |
2534 | #ifndef TARGET_UNDERSCORE |
2535 | #define TARGET_UNDERSCORE 0 | |
252b5132 | 2536 | #endif |
c3c89269 | 2537 | |
f78c5281 | 2538 | #ifndef EXTRA_S_FLAGS |
c3c89269 NC |
2539 | #ifdef COFF_WITH_PE |
2540 | #define EXTRA_S_FLAGS (SEC_LINK_ONCE | SEC_LINK_DUPLICATES) | |
252b5132 | 2541 | #else |
c3c89269 | 2542 | #define EXTRA_S_FLAGS 0 |
252b5132 | 2543 | #endif |
f78c5281 | 2544 | #endif |
252b5132 | 2545 | |
c3c89269 NC |
2546 | /* Forward declaration for use initialising alternative_target field. */ |
2547 | extern const bfd_target TARGET_BIG_SYM ; | |
252b5132 | 2548 | |
c3c89269 NC |
2549 | /* Target vectors. */ |
2550 | CREATE_LITTLE_COFF_TARGET_VEC (TARGET_LITTLE_SYM, TARGET_LITTLE_NAME, D_PAGED, EXTRA_S_FLAGS, TARGET_UNDERSCORE, & TARGET_BIG_SYM) | |
2551 | CREATE_BIG_COFF_TARGET_VEC (TARGET_BIG_SYM, TARGET_BIG_NAME, D_PAGED, EXTRA_S_FLAGS, TARGET_UNDERSCORE, & TARGET_LITTLE_SYM) |