Commit | Line | Data |
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252b5132 | 1 | /* Matsushita 10300 specific support for 32-bit ELF |
a022216b | 2 | Copyright (C) 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc. |
252b5132 RH |
3 | |
4 | This file is part of BFD, the Binary File Descriptor library. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
19 | ||
20 | #include "bfd.h" | |
21 | #include "sysdep.h" | |
22 | #include "libbfd.h" | |
23 | #include "elf-bfd.h" | |
24 | #include "elf/mn10300.h" | |
25 | ||
26 | struct elf32_mn10300_link_hash_entry | |
27 | { | |
28 | /* The basic elf link hash table entry. */ | |
29 | struct elf_link_hash_entry root; | |
30 | ||
31 | /* For function symbols, the number of times this function is | |
32 | called directly (ie by name). */ | |
33 | unsigned int direct_calls; | |
34 | ||
35 | /* For function symbols, the size of this function's stack | |
36 | (if <= 255 bytes). We stuff this into "call" instructions | |
37 | to this target when it's valid and profitable to do so. | |
38 | ||
39 | This does not include stack allocated by movm! */ | |
40 | unsigned char stack_size; | |
41 | ||
42 | /* For function symbols, arguments (if any) for movm instruction | |
43 | in the prologue. We stuff this value into "call" instructions | |
44 | to the target when it's valid and profitable to do so. */ | |
45 | unsigned char movm_args; | |
46 | ||
47 | /* For funtion symbols, the amount of stack space that would be allocated | |
48 | by the movm instruction. This is redundant with movm_args, but we | |
49 | add it to the hash table to avoid computing it over and over. */ | |
50 | unsigned char movm_stack_size; | |
51 | ||
52 | /* When set, convert all "call" instructions to this target into "calls" | |
53 | instructions. */ | |
54 | #define MN10300_CONVERT_CALL_TO_CALLS 0x1 | |
55 | ||
56 | /* Used to mark functions which have had redundant parts of their | |
57 | prologue deleted. */ | |
58 | #define MN10300_DELETED_PROLOGUE_BYTES 0x2 | |
59 | unsigned char flags; | |
60 | }; | |
61 | ||
62 | /* We derive a hash table from the main elf linker hash table so | |
63 | we can store state variables and a secondary hash table without | |
64 | resorting to global variables. */ | |
65 | struct elf32_mn10300_link_hash_table | |
66 | { | |
67 | /* The main hash table. */ | |
68 | struct elf_link_hash_table root; | |
69 | ||
70 | /* A hash table for static functions. We could derive a new hash table | |
71 | instead of using the full elf32_mn10300_link_hash_table if we wanted | |
72 | to save some memory. */ | |
73 | struct elf32_mn10300_link_hash_table *static_hash_table; | |
74 | ||
75 | /* Random linker state flags. */ | |
76 | #define MN10300_HASH_ENTRIES_INITIALIZED 0x1 | |
77 | char flags; | |
78 | }; | |
79 | ||
80 | /* For MN10300 linker hash table. */ | |
81 | ||
82 | /* Get the MN10300 ELF linker hash table from a link_info structure. */ | |
83 | ||
84 | #define elf32_mn10300_hash_table(p) \ | |
85 | ((struct elf32_mn10300_link_hash_table *) ((p)->hash)) | |
86 | ||
87 | #define elf32_mn10300_link_hash_traverse(table, func, info) \ | |
88 | (elf_link_hash_traverse \ | |
89 | (&(table)->root, \ | |
90 | (boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \ | |
91 | (info))) | |
92 | ||
93 | static struct bfd_hash_entry *elf32_mn10300_link_hash_newfunc | |
94 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); | |
95 | static struct bfd_link_hash_table *elf32_mn10300_link_hash_table_create | |
96 | PARAMS ((bfd *)); | |
97 | ||
98 | static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup | |
99 | PARAMS ((bfd *abfd, bfd_reloc_code_real_type code)); | |
100 | static void mn10300_info_to_howto | |
101 | PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *)); | |
102 | static boolean mn10300_elf_check_relocs | |
103 | PARAMS ((bfd *, struct bfd_link_info *, asection *, | |
104 | const Elf_Internal_Rela *)); | |
105 | static asection *mn10300_elf_gc_mark_hook | |
106 | PARAMS ((bfd *, struct bfd_link_info *info, Elf_Internal_Rela *, | |
107 | struct elf_link_hash_entry *, Elf_Internal_Sym *)); | |
108 | static boolean mn10300_elf_relax_delete_bytes | |
109 | PARAMS ((bfd *, asection *, bfd_vma, int)); | |
110 | static boolean mn10300_elf_symbol_address_p | |
111 | PARAMS ((bfd *, asection *, Elf32_External_Sym *, bfd_vma)); | |
112 | static boolean elf32_mn10300_finish_hash_table_entry | |
113 | PARAMS ((struct bfd_hash_entry *, PTR)); | |
114 | static void compute_function_info | |
115 | PARAMS ((bfd *, struct elf32_mn10300_link_hash_entry *, | |
116 | bfd_vma, unsigned char *)); | |
117 | ||
118 | /* We have to use RELA instructions since md_apply_fix3 in the assembler | |
119 | does absolutely nothing. */ | |
120 | #define USE_RELA | |
121 | ||
252b5132 RH |
122 | static reloc_howto_type elf_mn10300_howto_table[] = |
123 | { | |
124 | /* Dummy relocation. Does nothing. */ | |
125 | HOWTO (R_MN10300_NONE, | |
126 | 0, | |
127 | 2, | |
128 | 16, | |
129 | false, | |
130 | 0, | |
131 | complain_overflow_bitfield, | |
132 | bfd_elf_generic_reloc, | |
133 | "R_MN10300_NONE", | |
134 | false, | |
135 | 0, | |
136 | 0, | |
137 | false), | |
138 | /* Standard 32 bit reloc. */ | |
139 | HOWTO (R_MN10300_32, | |
140 | 0, | |
141 | 2, | |
142 | 32, | |
143 | false, | |
144 | 0, | |
145 | complain_overflow_bitfield, | |
146 | bfd_elf_generic_reloc, | |
147 | "R_MN10300_32", | |
148 | false, | |
149 | 0xffffffff, | |
150 | 0xffffffff, | |
151 | false), | |
152 | /* Standard 16 bit reloc. */ | |
153 | HOWTO (R_MN10300_16, | |
154 | 0, | |
155 | 1, | |
156 | 16, | |
157 | false, | |
158 | 0, | |
159 | complain_overflow_bitfield, | |
160 | bfd_elf_generic_reloc, | |
161 | "R_MN10300_16", | |
162 | false, | |
163 | 0xffff, | |
164 | 0xffff, | |
165 | false), | |
166 | /* Standard 8 bit reloc. */ | |
167 | HOWTO (R_MN10300_8, | |
168 | 0, | |
169 | 0, | |
170 | 8, | |
171 | false, | |
172 | 0, | |
173 | complain_overflow_bitfield, | |
174 | bfd_elf_generic_reloc, | |
175 | "R_MN10300_8", | |
176 | false, | |
177 | 0xff, | |
178 | 0xff, | |
179 | false), | |
180 | /* Standard 32bit pc-relative reloc. */ | |
181 | HOWTO (R_MN10300_PCREL32, | |
182 | 0, | |
183 | 2, | |
184 | 32, | |
185 | true, | |
186 | 0, | |
187 | complain_overflow_bitfield, | |
188 | bfd_elf_generic_reloc, | |
189 | "R_MN10300_PCREL32", | |
190 | false, | |
191 | 0xffffffff, | |
192 | 0xffffffff, | |
193 | true), | |
194 | /* Standard 16bit pc-relative reloc. */ | |
195 | HOWTO (R_MN10300_PCREL16, | |
196 | 0, | |
197 | 1, | |
198 | 16, | |
199 | true, | |
200 | 0, | |
201 | complain_overflow_bitfield, | |
202 | bfd_elf_generic_reloc, | |
203 | "R_MN10300_PCREL16", | |
204 | false, | |
205 | 0xffff, | |
206 | 0xffff, | |
207 | true), | |
208 | /* Standard 8 pc-relative reloc. */ | |
209 | HOWTO (R_MN10300_PCREL8, | |
210 | 0, | |
211 | 0, | |
212 | 8, | |
213 | true, | |
214 | 0, | |
215 | complain_overflow_bitfield, | |
216 | bfd_elf_generic_reloc, | |
217 | "R_MN10300_PCREL8", | |
218 | false, | |
219 | 0xff, | |
220 | 0xff, | |
221 | true), | |
222 | ||
223 | /* GNU extension to record C++ vtable hierarchy */ | |
224 | HOWTO (R_MN10300_GNU_VTINHERIT, /* type */ | |
225 | 0, /* rightshift */ | |
226 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
227 | 0, /* bitsize */ | |
228 | false, /* pc_relative */ | |
229 | 0, /* bitpos */ | |
230 | complain_overflow_dont, /* complain_on_overflow */ | |
231 | NULL, /* special_function */ | |
232 | "R_MN10300_GNU_VTINHERIT", /* name */ | |
233 | false, /* partial_inplace */ | |
234 | 0, /* src_mask */ | |
235 | 0, /* dst_mask */ | |
236 | false), /* pcrel_offset */ | |
237 | ||
238 | /* GNU extension to record C++ vtable member usage */ | |
239 | HOWTO (R_MN10300_GNU_VTENTRY, /* type */ | |
240 | 0, /* rightshift */ | |
241 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
242 | 0, /* bitsize */ | |
243 | false, /* pc_relative */ | |
244 | 0, /* bitpos */ | |
245 | complain_overflow_dont, /* complain_on_overflow */ | |
246 | NULL, /* special_function */ | |
247 | "R_MN10300_GNU_VTENTRY", /* name */ | |
248 | false, /* partial_inplace */ | |
249 | 0, /* src_mask */ | |
250 | 0, /* dst_mask */ | |
251 | false), /* pcrel_offset */ | |
252 | ||
253 | /* Standard 24 bit reloc. */ | |
254 | HOWTO (R_MN10300_24, | |
255 | 0, | |
256 | 2, | |
257 | 24, | |
258 | false, | |
259 | 0, | |
260 | complain_overflow_bitfield, | |
261 | bfd_elf_generic_reloc, | |
262 | "R_MN10300_24", | |
263 | false, | |
264 | 0xffffff, | |
265 | 0xffffff, | |
266 | false), | |
267 | ||
268 | }; | |
269 | ||
270 | struct mn10300_reloc_map | |
271 | { | |
272 | bfd_reloc_code_real_type bfd_reloc_val; | |
273 | unsigned char elf_reloc_val; | |
274 | }; | |
275 | ||
276 | static const struct mn10300_reloc_map mn10300_reloc_map[] = | |
277 | { | |
278 | { BFD_RELOC_NONE, R_MN10300_NONE, }, | |
279 | { BFD_RELOC_32, R_MN10300_32, }, | |
280 | { BFD_RELOC_16, R_MN10300_16, }, | |
281 | { BFD_RELOC_8, R_MN10300_8, }, | |
282 | { BFD_RELOC_32_PCREL, R_MN10300_PCREL32, }, | |
283 | { BFD_RELOC_16_PCREL, R_MN10300_PCREL16, }, | |
284 | { BFD_RELOC_8_PCREL, R_MN10300_PCREL8, }, | |
285 | { BFD_RELOC_24, R_MN10300_24, }, | |
286 | { BFD_RELOC_VTABLE_INHERIT, R_MN10300_GNU_VTINHERIT }, | |
287 | { BFD_RELOC_VTABLE_ENTRY, R_MN10300_GNU_VTENTRY }, | |
288 | }; | |
289 | ||
290 | static reloc_howto_type * | |
291 | bfd_elf32_bfd_reloc_type_lookup (abfd, code) | |
5f771d47 | 292 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
293 | bfd_reloc_code_real_type code; |
294 | { | |
295 | unsigned int i; | |
296 | ||
297 | for (i = 0; | |
298 | i < sizeof (mn10300_reloc_map) / sizeof (struct mn10300_reloc_map); | |
299 | i++) | |
300 | { | |
301 | if (mn10300_reloc_map[i].bfd_reloc_val == code) | |
302 | return &elf_mn10300_howto_table[mn10300_reloc_map[i].elf_reloc_val]; | |
303 | } | |
304 | ||
305 | return NULL; | |
306 | } | |
307 | ||
308 | /* Set the howto pointer for an MN10300 ELF reloc. */ | |
309 | ||
310 | static void | |
311 | mn10300_info_to_howto (abfd, cache_ptr, dst) | |
5f771d47 | 312 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
313 | arelent *cache_ptr; |
314 | Elf32_Internal_Rela *dst; | |
315 | { | |
316 | unsigned int r_type; | |
317 | ||
318 | r_type = ELF32_R_TYPE (dst->r_info); | |
319 | BFD_ASSERT (r_type < (unsigned int) R_MN10300_MAX); | |
320 | cache_ptr->howto = &elf_mn10300_howto_table[r_type]; | |
321 | } | |
322 | ||
323 | /* Look through the relocs for a section during the first phase. | |
324 | Since we don't do .gots or .plts, we just need to consider the | |
325 | virtual table relocs for gc. */ | |
326 | ||
327 | static boolean | |
328 | mn10300_elf_check_relocs (abfd, info, sec, relocs) | |
329 | bfd *abfd; | |
330 | struct bfd_link_info *info; | |
331 | asection *sec; | |
332 | const Elf_Internal_Rela *relocs; | |
333 | { | |
334 | Elf_Internal_Shdr *symtab_hdr; | |
335 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; | |
336 | const Elf_Internal_Rela *rel; | |
337 | const Elf_Internal_Rela *rel_end; | |
338 | ||
339 | if (info->relocateable) | |
340 | return true; | |
341 | ||
342 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
343 | sym_hashes = elf_sym_hashes (abfd); | |
a7c10850 | 344 | sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym); |
252b5132 RH |
345 | if (!elf_bad_symtab (abfd)) |
346 | sym_hashes_end -= symtab_hdr->sh_info; | |
347 | ||
348 | rel_end = relocs + sec->reloc_count; | |
349 | for (rel = relocs; rel < rel_end; rel++) | |
350 | { | |
351 | struct elf_link_hash_entry *h; | |
352 | unsigned long r_symndx; | |
353 | ||
354 | r_symndx = ELF32_R_SYM (rel->r_info); | |
355 | if (r_symndx < symtab_hdr->sh_info) | |
356 | h = NULL; | |
357 | else | |
358 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
359 | ||
360 | switch (ELF32_R_TYPE (rel->r_info)) | |
361 | { | |
362 | /* This relocation describes the C++ object vtable hierarchy. | |
363 | Reconstruct it for later use during GC. */ | |
364 | case R_MN10300_GNU_VTINHERIT: | |
365 | if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
366 | return false; | |
367 | break; | |
368 | ||
369 | /* This relocation describes which C++ vtable entries are actually | |
370 | used. Record for later use during GC. */ | |
371 | case R_MN10300_GNU_VTENTRY: | |
372 | if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
373 | return false; | |
374 | break; | |
375 | } | |
376 | } | |
377 | ||
378 | return true; | |
379 | } | |
380 | ||
381 | /* Return the section that should be marked against GC for a given | |
382 | relocation. */ | |
383 | ||
384 | static asection * | |
385 | mn10300_elf_gc_mark_hook (abfd, info, rel, h, sym) | |
386 | bfd *abfd; | |
5f771d47 | 387 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
252b5132 RH |
388 | Elf_Internal_Rela *rel; |
389 | struct elf_link_hash_entry *h; | |
390 | Elf_Internal_Sym *sym; | |
391 | { | |
392 | if (h != NULL) | |
393 | { | |
394 | switch (ELF32_R_TYPE (rel->r_info)) | |
395 | { | |
396 | case R_MN10300_GNU_VTINHERIT: | |
397 | case R_MN10300_GNU_VTENTRY: | |
398 | break; | |
399 | ||
400 | default: | |
401 | switch (h->root.type) | |
402 | { | |
403 | case bfd_link_hash_defined: | |
404 | case bfd_link_hash_defweak: | |
405 | return h->root.u.def.section; | |
406 | ||
407 | case bfd_link_hash_common: | |
408 | return h->root.u.c.p->section; | |
e049a0de ILT |
409 | |
410 | default: | |
411 | break; | |
252b5132 RH |
412 | } |
413 | } | |
414 | } | |
415 | else | |
416 | { | |
417 | if (!(elf_bad_symtab (abfd) | |
418 | && ELF_ST_BIND (sym->st_info) != STB_LOCAL) | |
419 | && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE) | |
420 | && sym->st_shndx != SHN_COMMON)) | |
421 | { | |
422 | return bfd_section_from_elf_index (abfd, sym->st_shndx); | |
423 | } | |
424 | } | |
425 | ||
426 | return NULL; | |
427 | } | |
428 | ||
429 | /* Perform a relocation as part of a final link. */ | |
430 | static bfd_reloc_status_type | |
431 | mn10300_elf_final_link_relocate (howto, input_bfd, output_bfd, | |
432 | input_section, contents, offset, value, | |
433 | addend, info, sym_sec, is_local) | |
434 | reloc_howto_type *howto; | |
435 | bfd *input_bfd; | |
5f771d47 | 436 | bfd *output_bfd ATTRIBUTE_UNUSED; |
252b5132 RH |
437 | asection *input_section; |
438 | bfd_byte *contents; | |
439 | bfd_vma offset; | |
440 | bfd_vma value; | |
441 | bfd_vma addend; | |
5f771d47 ILT |
442 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
443 | asection *sym_sec ATTRIBUTE_UNUSED; | |
444 | int is_local ATTRIBUTE_UNUSED; | |
252b5132 RH |
445 | { |
446 | unsigned long r_type = howto->type; | |
447 | bfd_byte *hit_data = contents + offset; | |
448 | ||
449 | switch (r_type) | |
450 | { | |
451 | case R_MN10300_NONE: | |
452 | return bfd_reloc_ok; | |
453 | ||
454 | case R_MN10300_32: | |
455 | value += addend; | |
456 | bfd_put_32 (input_bfd, value, hit_data); | |
457 | return bfd_reloc_ok; | |
458 | ||
459 | case R_MN10300_24: | |
460 | value += addend; | |
461 | ||
462 | if ((long)value > 0x7fffff || (long)value < -0x800000) | |
463 | return bfd_reloc_overflow; | |
464 | ||
465 | bfd_put_8 (input_bfd, value & 0xff, hit_data); | |
466 | bfd_put_8 (input_bfd, (value >> 8) & 0xff, hit_data + 1); | |
467 | bfd_put_8 (input_bfd, (value >> 16) & 0xff, hit_data + 2); | |
468 | return bfd_reloc_ok; | |
469 | ||
470 | case R_MN10300_16: | |
471 | value += addend; | |
472 | ||
473 | if ((long)value > 0x7fff || (long)value < -0x8000) | |
474 | return bfd_reloc_overflow; | |
475 | ||
476 | bfd_put_16 (input_bfd, value, hit_data); | |
477 | return bfd_reloc_ok; | |
478 | ||
479 | case R_MN10300_8: | |
480 | value += addend; | |
481 | ||
482 | if ((long)value > 0x7f || (long)value < -0x80) | |
483 | return bfd_reloc_overflow; | |
484 | ||
485 | bfd_put_8 (input_bfd, value, hit_data); | |
486 | return bfd_reloc_ok; | |
487 | ||
488 | case R_MN10300_PCREL8: | |
489 | value -= (input_section->output_section->vma | |
490 | + input_section->output_offset); | |
491 | value -= offset; | |
492 | value += addend; | |
493 | ||
494 | if ((long)value > 0xff || (long)value < -0x100) | |
495 | return bfd_reloc_overflow; | |
496 | ||
497 | bfd_put_8 (input_bfd, value, hit_data); | |
498 | return bfd_reloc_ok; | |
499 | ||
500 | case R_MN10300_PCREL16: | |
501 | value -= (input_section->output_section->vma | |
502 | + input_section->output_offset); | |
503 | value -= offset; | |
504 | value += addend; | |
505 | ||
506 | if ((long)value > 0xffff || (long)value < -0x10000) | |
507 | return bfd_reloc_overflow; | |
508 | ||
509 | bfd_put_16 (input_bfd, value, hit_data); | |
510 | return bfd_reloc_ok; | |
511 | ||
512 | case R_MN10300_PCREL32: | |
513 | value -= (input_section->output_section->vma | |
514 | + input_section->output_offset); | |
515 | value -= offset; | |
516 | value += addend; | |
517 | ||
518 | bfd_put_32 (input_bfd, value, hit_data); | |
519 | return bfd_reloc_ok; | |
520 | ||
521 | case R_MN10300_GNU_VTINHERIT: | |
522 | case R_MN10300_GNU_VTENTRY: | |
523 | return bfd_reloc_ok; | |
524 | ||
525 | default: | |
526 | return bfd_reloc_notsupported; | |
527 | } | |
528 | } | |
529 | ||
530 | \f | |
531 | /* Relocate an MN10300 ELF section. */ | |
532 | static boolean | |
533 | mn10300_elf_relocate_section (output_bfd, info, input_bfd, input_section, | |
534 | contents, relocs, local_syms, local_sections) | |
535 | bfd *output_bfd; | |
536 | struct bfd_link_info *info; | |
537 | bfd *input_bfd; | |
538 | asection *input_section; | |
539 | bfd_byte *contents; | |
540 | Elf_Internal_Rela *relocs; | |
541 | Elf_Internal_Sym *local_syms; | |
542 | asection **local_sections; | |
543 | { | |
544 | Elf_Internal_Shdr *symtab_hdr; | |
545 | struct elf32_mn10300_link_hash_entry **sym_hashes; | |
546 | Elf_Internal_Rela *rel, *relend; | |
547 | ||
548 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
549 | sym_hashes = (struct elf32_mn10300_link_hash_entry **) | |
550 | (elf_sym_hashes (input_bfd)); | |
551 | ||
552 | rel = relocs; | |
553 | relend = relocs + input_section->reloc_count; | |
554 | for (; rel < relend; rel++) | |
555 | { | |
556 | int r_type; | |
557 | reloc_howto_type *howto; | |
558 | unsigned long r_symndx; | |
559 | Elf_Internal_Sym *sym; | |
560 | asection *sec; | |
561 | struct elf32_mn10300_link_hash_entry *h; | |
562 | bfd_vma relocation; | |
563 | bfd_reloc_status_type r; | |
564 | ||
565 | r_symndx = ELF32_R_SYM (rel->r_info); | |
566 | r_type = ELF32_R_TYPE (rel->r_info); | |
567 | howto = elf_mn10300_howto_table + r_type; | |
568 | ||
569 | /* Just skip the vtable gc relocs. */ | |
570 | if (r_type == R_MN10300_GNU_VTINHERIT | |
571 | || r_type == R_MN10300_GNU_VTENTRY) | |
572 | continue; | |
573 | ||
574 | if (info->relocateable) | |
575 | { | |
576 | /* This is a relocateable link. We don't have to change | |
577 | anything, unless the reloc is against a section symbol, | |
578 | in which case we have to adjust according to where the | |
579 | section symbol winds up in the output section. */ | |
580 | if (r_symndx < symtab_hdr->sh_info) | |
581 | { | |
582 | sym = local_syms + r_symndx; | |
583 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
584 | { | |
585 | sec = local_sections[r_symndx]; | |
586 | rel->r_addend += sec->output_offset + sym->st_value; | |
587 | } | |
588 | } | |
589 | ||
590 | continue; | |
591 | } | |
592 | ||
593 | /* This is a final link. */ | |
594 | h = NULL; | |
595 | sym = NULL; | |
596 | sec = NULL; | |
597 | if (r_symndx < symtab_hdr->sh_info) | |
598 | { | |
599 | sym = local_syms + r_symndx; | |
600 | sec = local_sections[r_symndx]; | |
601 | relocation = (sec->output_section->vma | |
602 | + sec->output_offset | |
603 | + sym->st_value); | |
604 | } | |
605 | else | |
606 | { | |
607 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
608 | while (h->root.type == bfd_link_hash_indirect | |
609 | || h->root.type == bfd_link_hash_warning) | |
610 | h = (struct elf32_mn10300_link_hash_entry *) h->root.root.u.i.link; | |
611 | if (h->root.root.type == bfd_link_hash_defined | |
612 | || h->root.root.type == bfd_link_hash_defweak) | |
613 | { | |
614 | sec = h->root.root.u.def.section; | |
615 | relocation = (h->root.root.u.def.value | |
616 | + sec->output_section->vma | |
617 | + sec->output_offset); | |
618 | } | |
619 | else if (h->root.root.type == bfd_link_hash_undefweak) | |
620 | relocation = 0; | |
621 | else | |
622 | { | |
623 | if (! ((*info->callbacks->undefined_symbol) | |
624 | (info, h->root.root.root.string, input_bfd, | |
5cc7c785 | 625 | input_section, rel->r_offset, true))) |
252b5132 RH |
626 | return false; |
627 | relocation = 0; | |
628 | } | |
629 | } | |
630 | ||
631 | r = mn10300_elf_final_link_relocate (howto, input_bfd, output_bfd, | |
632 | input_section, | |
633 | contents, rel->r_offset, | |
634 | relocation, rel->r_addend, | |
635 | info, sec, h == NULL); | |
636 | ||
637 | if (r != bfd_reloc_ok) | |
638 | { | |
639 | const char *name; | |
640 | const char *msg = (const char *)0; | |
641 | ||
642 | if (h != NULL) | |
643 | name = h->root.root.root.string; | |
644 | else | |
645 | { | |
646 | name = (bfd_elf_string_from_elf_section | |
647 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); | |
648 | if (name == NULL || *name == '\0') | |
649 | name = bfd_section_name (input_bfd, sec); | |
650 | } | |
651 | ||
652 | switch (r) | |
653 | { | |
654 | case bfd_reloc_overflow: | |
655 | if (! ((*info->callbacks->reloc_overflow) | |
656 | (info, name, howto->name, (bfd_vma) 0, | |
657 | input_bfd, input_section, rel->r_offset))) | |
658 | return false; | |
659 | break; | |
660 | ||
661 | case bfd_reloc_undefined: | |
662 | if (! ((*info->callbacks->undefined_symbol) | |
663 | (info, name, input_bfd, input_section, | |
5cc7c785 | 664 | rel->r_offset, true))) |
252b5132 RH |
665 | return false; |
666 | break; | |
667 | ||
668 | case bfd_reloc_outofrange: | |
669 | msg = _("internal error: out of range error"); | |
670 | goto common_error; | |
671 | ||
672 | case bfd_reloc_notsupported: | |
673 | msg = _("internal error: unsupported relocation error"); | |
674 | goto common_error; | |
675 | ||
676 | case bfd_reloc_dangerous: | |
677 | msg = _("internal error: dangerous error"); | |
678 | goto common_error; | |
679 | ||
680 | default: | |
681 | msg = _("internal error: unknown error"); | |
682 | /* fall through */ | |
683 | ||
684 | common_error: | |
685 | if (!((*info->callbacks->warning) | |
686 | (info, msg, name, input_bfd, input_section, | |
687 | rel->r_offset))) | |
688 | return false; | |
689 | break; | |
690 | } | |
691 | } | |
692 | } | |
693 | ||
694 | return true; | |
695 | } | |
696 | ||
697 | /* Finish initializing one hash table entry. */ | |
698 | static boolean | |
699 | elf32_mn10300_finish_hash_table_entry (gen_entry, in_args) | |
700 | struct bfd_hash_entry *gen_entry; | |
5f771d47 | 701 | PTR in_args ATTRIBUTE_UNUSED; |
252b5132 RH |
702 | { |
703 | struct elf32_mn10300_link_hash_entry *entry; | |
704 | unsigned int byte_count = 0; | |
705 | ||
706 | entry = (struct elf32_mn10300_link_hash_entry *)gen_entry; | |
707 | ||
708 | /* If we already know we want to convert "call" to "calls" for calls | |
709 | to this symbol, then return now. */ | |
710 | if (entry->flags == MN10300_CONVERT_CALL_TO_CALLS) | |
711 | return true; | |
712 | ||
713 | /* If there are no named calls to this symbol, or there's nothing we | |
714 | can move from the function itself into the "call" instruction, then | |
715 | note that all "call" instructions should be converted into "calls" | |
716 | instructions and return. */ | |
717 | if (entry->direct_calls == 0 | |
718 | || (entry->stack_size == 0 && entry->movm_args == 0)) | |
719 | { | |
720 | /* Make a note that we should convert "call" instructions to "calls" | |
721 | instructions for calls to this symbol. */ | |
722 | entry->flags |= MN10300_CONVERT_CALL_TO_CALLS; | |
723 | return true; | |
724 | } | |
725 | ||
726 | /* We may be able to move some instructions from the function itself into | |
727 | the "call" instruction. Count how many bytes we might be able to | |
728 | eliminate in the function itself. */ | |
729 | ||
730 | /* A movm instruction is two bytes. */ | |
731 | if (entry->movm_args) | |
732 | byte_count += 2; | |
733 | ||
734 | /* Count the insn to allocate stack space too. */ | |
735 | if (entry->stack_size > 0 && entry->stack_size <= 128) | |
736 | byte_count += 3; | |
737 | else if (entry->stack_size > 0 && entry->stack_size < 256) | |
738 | byte_count += 4; | |
739 | ||
740 | /* If using "call" will result in larger code, then turn all | |
741 | the associated "call" instructions into "calls" instrutions. */ | |
742 | if (byte_count < entry->direct_calls) | |
743 | entry->flags |= MN10300_CONVERT_CALL_TO_CALLS; | |
744 | ||
745 | /* This routine never fails. */ | |
746 | return true; | |
747 | } | |
748 | ||
749 | /* This function handles relaxing for the mn10300. | |
750 | ||
751 | There's quite a few relaxing opportunites available on the mn10300: | |
752 | ||
753 | * calls:32 -> calls:16 2 bytes | |
754 | * call:32 -> call:16 2 bytes | |
755 | ||
756 | * call:32 -> calls:32 1 byte | |
757 | * call:16 -> calls:16 1 byte | |
758 | * These are done anytime using "calls" would result | |
759 | in smaller code, or when necessary to preserve the | |
760 | meaning of the program. | |
761 | ||
762 | * call:32 varies | |
763 | * call:16 | |
764 | * In some circumstances we can move instructions | |
765 | from a function prologue into a "call" instruction. | |
766 | This is only done if the resulting code is no larger | |
767 | than the original code. | |
768 | ||
252b5132 RH |
769 | * jmp:32 -> jmp:16 2 bytes |
770 | * jmp:16 -> bra:8 1 byte | |
771 | ||
772 | * If the previous instruction is a conditional branch | |
773 | around the jump/bra, we may be able to reverse its condition | |
774 | and change its target to the jump's target. The jump/bra | |
775 | can then be deleted. 2 bytes | |
776 | ||
777 | * mov abs32 -> mov abs16 1 or 2 bytes | |
778 | ||
779 | * Most instructions which accept imm32 can relax to imm16 1 or 2 bytes | |
780 | - Most instructions which accept imm16 can relax to imm8 1 or 2 bytes | |
781 | ||
782 | * Most instructions which accept d32 can relax to d16 1 or 2 bytes | |
783 | - Most instructions which accept d16 can relax to d8 1 or 2 bytes | |
784 | ||
785 | We don't handle imm16->imm8 or d16->d8 as they're very rare | |
786 | and somewhat more difficult to support. */ | |
787 | ||
788 | static boolean | |
789 | mn10300_elf_relax_section (abfd, sec, link_info, again) | |
790 | bfd *abfd; | |
791 | asection *sec; | |
792 | struct bfd_link_info *link_info; | |
793 | boolean *again; | |
794 | { | |
795 | Elf_Internal_Shdr *symtab_hdr; | |
796 | Elf_Internal_Rela *internal_relocs = NULL; | |
797 | Elf_Internal_Rela *free_relocs = NULL; | |
798 | Elf_Internal_Rela *irel, *irelend; | |
799 | bfd_byte *contents = NULL; | |
800 | bfd_byte *free_contents = NULL; | |
801 | Elf32_External_Sym *extsyms = NULL; | |
802 | Elf32_External_Sym *free_extsyms = NULL; | |
803 | struct elf32_mn10300_link_hash_table *hash_table; | |
804 | ||
805 | /* Assume nothing changes. */ | |
806 | *again = false; | |
807 | ||
808 | /* We need a pointer to the mn10300 specific hash table. */ | |
809 | hash_table = elf32_mn10300_hash_table (link_info); | |
810 | ||
811 | /* Initialize fields in each hash table entry the first time through. */ | |
812 | if ((hash_table->flags & MN10300_HASH_ENTRIES_INITIALIZED) == 0) | |
813 | { | |
814 | bfd *input_bfd; | |
815 | ||
816 | /* Iterate over all the input bfds. */ | |
817 | for (input_bfd = link_info->input_bfds; | |
818 | input_bfd != NULL; | |
819 | input_bfd = input_bfd->link_next) | |
820 | { | |
821 | asection *section; | |
822 | ||
823 | /* We're going to need all the symbols for each bfd. */ | |
824 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
825 | ||
826 | /* Get cached copy if it exists. */ | |
827 | if (symtab_hdr->contents != NULL) | |
828 | extsyms = (Elf32_External_Sym *) symtab_hdr->contents; | |
829 | else | |
830 | { | |
831 | /* Go get them off disk. */ | |
832 | extsyms = ((Elf32_External_Sym *) | |
833 | bfd_malloc (symtab_hdr->sh_size)); | |
834 | if (extsyms == NULL) | |
835 | goto error_return; | |
836 | free_extsyms = extsyms; | |
837 | if (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0 | |
838 | || (bfd_read (extsyms, 1, symtab_hdr->sh_size, input_bfd) | |
839 | != symtab_hdr->sh_size)) | |
840 | goto error_return; | |
841 | } | |
842 | ||
843 | /* Iterate over each section in this bfd. */ | |
844 | for (section = input_bfd->sections; | |
845 | section != NULL; | |
846 | section = section->next) | |
847 | { | |
848 | struct elf32_mn10300_link_hash_entry *hash; | |
849 | Elf_Internal_Sym *sym; | |
86033394 | 850 | asection *sym_sec = NULL; |
252b5132 RH |
851 | const char *sym_name; |
852 | char *new_name; | |
252b5132 RH |
853 | |
854 | /* Get cached copy of section contents if it exists. */ | |
855 | if (elf_section_data (section)->this_hdr.contents != NULL) | |
856 | contents = elf_section_data (section)->this_hdr.contents; | |
857 | else if (section->_raw_size != 0) | |
858 | { | |
859 | /* Go get them off disk. */ | |
860 | contents = (bfd_byte *)bfd_malloc (section->_raw_size); | |
861 | if (contents == NULL) | |
862 | goto error_return; | |
863 | free_contents = contents; | |
864 | ||
865 | if (!bfd_get_section_contents (input_bfd, section, | |
866 | contents, (file_ptr) 0, | |
867 | section->_raw_size)) | |
868 | goto error_return; | |
869 | } | |
870 | else | |
871 | { | |
872 | contents = NULL; | |
873 | free_contents = NULL; | |
874 | } | |
875 | ||
876 | /* If there aren't any relocs, then there's nothing to do. */ | |
877 | if ((section->flags & SEC_RELOC) != 0 | |
878 | && section->reloc_count != 0) | |
879 | { | |
880 | ||
881 | /* Get a copy of the native relocations. */ | |
882 | internal_relocs = (_bfd_elf32_link_read_relocs | |
883 | (input_bfd, section, (PTR) NULL, | |
884 | (Elf_Internal_Rela *) NULL, | |
885 | link_info->keep_memory)); | |
886 | if (internal_relocs == NULL) | |
887 | goto error_return; | |
888 | if (! link_info->keep_memory) | |
889 | free_relocs = internal_relocs; | |
890 | ||
891 | /* Now examine each relocation. */ | |
892 | irel = internal_relocs; | |
893 | irelend = irel + section->reloc_count; | |
894 | for (; irel < irelend; irel++) | |
895 | { | |
896 | long r_type; | |
897 | unsigned long r_index; | |
898 | unsigned char code; | |
899 | ||
900 | r_type = ELF32_R_TYPE (irel->r_info); | |
901 | r_index = ELF32_R_SYM (irel->r_info); | |
902 | ||
903 | if (r_type < 0 || r_type >= (int)R_MN10300_MAX) | |
904 | goto error_return; | |
905 | ||
906 | /* We need the name and hash table entry of the target | |
907 | symbol! */ | |
908 | hash = NULL; | |
909 | sym = NULL; | |
910 | sym_sec = NULL; | |
911 | ||
912 | if (r_index < symtab_hdr->sh_info) | |
913 | { | |
914 | /* A local symbol. */ | |
915 | Elf_Internal_Sym isym; | |
916 | ||
917 | bfd_elf32_swap_symbol_in (input_bfd, | |
918 | extsyms + r_index, &isym); | |
919 | ||
920 | if (isym.st_shndx == SHN_UNDEF) | |
921 | sym_sec = bfd_und_section_ptr; | |
922 | else if (isym.st_shndx > 0 | |
923 | && isym.st_shndx < SHN_LORESERVE) | |
924 | sym_sec | |
925 | = bfd_section_from_elf_index (input_bfd, | |
926 | isym.st_shndx); | |
927 | else if (isym.st_shndx == SHN_ABS) | |
928 | sym_sec = bfd_abs_section_ptr; | |
929 | else if (isym.st_shndx == SHN_COMMON) | |
930 | sym_sec = bfd_com_section_ptr; | |
a7c10850 | 931 | |
252b5132 RH |
932 | sym_name = bfd_elf_string_from_elf_section (input_bfd, |
933 | symtab_hdr->sh_link, | |
934 | isym.st_name); | |
935 | ||
936 | /* If it isn't a function, then we don't care | |
937 | about it. */ | |
938 | if (r_index < symtab_hdr->sh_info | |
939 | && ELF_ST_TYPE (isym.st_info) != STT_FUNC) | |
940 | continue; | |
941 | ||
942 | /* Tack on an ID so we can uniquely identify this | |
943 | local symbol in the global hash table. */ | |
944 | new_name = bfd_malloc (strlen (sym_name) + 10); | |
945 | if (new_name == 0) | |
946 | goto error_return; | |
947 | ||
948 | sprintf (new_name, "%s_%08x", sym_name, (int)sym_sec); | |
949 | sym_name = new_name; | |
950 | ||
951 | hash = (struct elf32_mn10300_link_hash_entry *) | |
952 | elf_link_hash_lookup (&hash_table->static_hash_table->root, | |
953 | sym_name, true, | |
954 | true, false); | |
955 | free (new_name); | |
956 | } | |
957 | else | |
958 | { | |
959 | r_index -= symtab_hdr->sh_info; | |
960 | hash = (struct elf32_mn10300_link_hash_entry *) | |
961 | elf_sym_hashes (input_bfd)[r_index]; | |
962 | } | |
963 | ||
964 | /* If this is not a "call" instruction, then we | |
965 | should convert "call" instructions to "calls" | |
966 | instructions. */ | |
967 | code = bfd_get_8 (input_bfd, | |
968 | contents + irel->r_offset - 1); | |
969 | if (code != 0xdd && code != 0xcd) | |
970 | hash->flags |= MN10300_CONVERT_CALL_TO_CALLS; | |
971 | ||
972 | /* If this is a jump/call, then bump the direct_calls | |
973 | counter. Else force "call" to "calls" conversions. */ | |
974 | if (r_type == R_MN10300_PCREL32 | |
975 | || r_type == R_MN10300_PCREL16) | |
976 | hash->direct_calls++; | |
977 | else | |
978 | hash->flags |= MN10300_CONVERT_CALL_TO_CALLS; | |
979 | } | |
980 | } | |
981 | ||
982 | /* Now look at the actual contents to get the stack size, | |
983 | and a list of what registers were saved in the prologue | |
984 | (ie movm_args). */ | |
985 | if ((section->flags & SEC_CODE) != 0) | |
986 | { | |
987 | ||
988 | Elf32_External_Sym *esym, *esymend; | |
989 | int idx, shndx; | |
990 | ||
991 | shndx = _bfd_elf_section_from_bfd_section (input_bfd, | |
992 | section); | |
993 | ||
252b5132 RH |
994 | /* Look at each function defined in this section and |
995 | update info for that function. */ | |
996 | esym = extsyms; | |
997 | esymend = esym + symtab_hdr->sh_info; | |
998 | for (; esym < esymend; esym++) | |
999 | { | |
1000 | Elf_Internal_Sym isym; | |
1001 | ||
1002 | bfd_elf32_swap_symbol_in (input_bfd, esym, &isym); | |
1003 | if (isym.st_shndx == shndx | |
1004 | && ELF_ST_TYPE (isym.st_info) == STT_FUNC) | |
1005 | { | |
1006 | if (isym.st_shndx == SHN_UNDEF) | |
1007 | sym_sec = bfd_und_section_ptr; | |
1008 | else if (isym.st_shndx > 0 | |
1009 | && isym.st_shndx < SHN_LORESERVE) | |
1010 | sym_sec | |
1011 | = bfd_section_from_elf_index (input_bfd, | |
1012 | isym.st_shndx); | |
1013 | else if (isym.st_shndx == SHN_ABS) | |
1014 | sym_sec = bfd_abs_section_ptr; | |
1015 | else if (isym.st_shndx == SHN_COMMON) | |
1016 | sym_sec = bfd_com_section_ptr; | |
1017 | ||
1018 | sym_name = bfd_elf_string_from_elf_section (input_bfd, | |
1019 | symtab_hdr->sh_link, | |
1020 | isym.st_name); | |
1021 | ||
1022 | /* Tack on an ID so we can uniquely identify this | |
1023 | local symbol in the global hash table. */ | |
1024 | new_name = bfd_malloc (strlen (sym_name) + 10); | |
1025 | if (new_name == 0) | |
1026 | goto error_return; | |
1027 | ||
1028 | sprintf (new_name, "%s_%08x", sym_name, (int)sym_sec); | |
1029 | sym_name = new_name; | |
1030 | ||
1031 | hash = (struct elf32_mn10300_link_hash_entry *) | |
1032 | elf_link_hash_lookup (&hash_table->static_hash_table->root, | |
1033 | sym_name, true, | |
1034 | true, false); | |
1035 | free (new_name); | |
1036 | compute_function_info (input_bfd, hash, | |
1037 | isym.st_value, contents); | |
1038 | } | |
1039 | } | |
1040 | ||
1041 | esym = extsyms + symtab_hdr->sh_info; | |
1042 | esymend = extsyms + (symtab_hdr->sh_size | |
1043 | / sizeof (Elf32_External_Sym)); | |
1044 | for (idx = 0; esym < esymend; esym++, idx++) | |
1045 | { | |
1046 | Elf_Internal_Sym isym; | |
1047 | ||
1048 | bfd_elf32_swap_symbol_in (input_bfd, esym, &isym); | |
1049 | hash = (struct elf32_mn10300_link_hash_entry *) | |
1050 | elf_sym_hashes (input_bfd)[idx]; | |
1051 | if (isym.st_shndx == shndx | |
1052 | && ELF_ST_TYPE (isym.st_info) == STT_FUNC | |
1053 | && (hash)->root.root.u.def.section == section | |
1054 | && ((hash)->root.root.type == bfd_link_hash_defined | |
1055 | || (hash)->root.root.type == bfd_link_hash_defweak)) | |
1056 | compute_function_info (input_bfd, hash, | |
1057 | (hash)->root.root.u.def.value, | |
1058 | contents); | |
1059 | } | |
1060 | } | |
1061 | ||
1062 | /* Cache or free any memory we allocated for the relocs. */ | |
1063 | if (free_relocs != NULL) | |
1064 | { | |
1065 | free (free_relocs); | |
1066 | free_relocs = NULL; | |
1067 | } | |
1068 | ||
1069 | /* Cache or free any memory we allocated for the contents. */ | |
1070 | if (free_contents != NULL) | |
1071 | { | |
1072 | if (! link_info->keep_memory) | |
1073 | free (free_contents); | |
1074 | else | |
1075 | { | |
1076 | /* Cache the section contents for elf_link_input_bfd. */ | |
1077 | elf_section_data (section)->this_hdr.contents = contents; | |
1078 | } | |
1079 | free_contents = NULL; | |
1080 | } | |
1081 | } | |
1082 | ||
1083 | /* Cache or free any memory we allocated for the symbols. */ | |
1084 | if (free_extsyms != NULL) | |
1085 | { | |
1086 | if (! link_info->keep_memory) | |
1087 | free (free_extsyms); | |
1088 | else | |
1089 | { | |
1090 | /* Cache the symbols for elf_link_input_bfd. */ | |
1091 | symtab_hdr->contents = extsyms; | |
1092 | } | |
1093 | free_extsyms = NULL; | |
1094 | } | |
1095 | } | |
1096 | ||
1097 | /* Now iterate on each symbol in the hash table and perform | |
1098 | the final initialization steps on each. */ | |
1099 | elf32_mn10300_link_hash_traverse (hash_table, | |
1100 | elf32_mn10300_finish_hash_table_entry, | |
1101 | NULL); | |
1102 | elf32_mn10300_link_hash_traverse (hash_table->static_hash_table, | |
1103 | elf32_mn10300_finish_hash_table_entry, | |
1104 | NULL); | |
1105 | ||
1106 | /* All entries in the hash table are fully initialized. */ | |
1107 | hash_table->flags |= MN10300_HASH_ENTRIES_INITIALIZED; | |
1108 | ||
1109 | /* Now that everything has been initialized, go through each | |
1110 | code section and delete any prologue insns which will be | |
1111 | redundant because their operations will be performed by | |
1112 | a "call" instruction. */ | |
1113 | for (input_bfd = link_info->input_bfds; | |
1114 | input_bfd != NULL; | |
1115 | input_bfd = input_bfd->link_next) | |
1116 | { | |
1117 | asection *section; | |
1118 | ||
1119 | /* We're going to need all the symbols for each bfd. */ | |
1120 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
1121 | ||
1122 | /* Get cached copy if it exists. */ | |
1123 | if (symtab_hdr->contents != NULL) | |
1124 | extsyms = (Elf32_External_Sym *) symtab_hdr->contents; | |
1125 | else | |
1126 | { | |
1127 | /* Go get them off disk. */ | |
1128 | extsyms = ((Elf32_External_Sym *) | |
1129 | bfd_malloc (symtab_hdr->sh_size)); | |
1130 | if (extsyms == NULL) | |
1131 | goto error_return; | |
1132 | free_extsyms = extsyms; | |
1133 | if (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0 | |
1134 | || (bfd_read (extsyms, 1, symtab_hdr->sh_size, input_bfd) | |
1135 | != symtab_hdr->sh_size)) | |
1136 | goto error_return; | |
1137 | } | |
1138 | ||
1139 | /* Walk over each section in this bfd. */ | |
1140 | for (section = input_bfd->sections; | |
1141 | section != NULL; | |
1142 | section = section->next) | |
1143 | { | |
1144 | int shndx; | |
1145 | Elf32_External_Sym *esym, *esymend; | |
1146 | int idx; | |
1147 | ||
1148 | /* Skip non-code sections and empty sections. */ | |
1149 | if ((section->flags & SEC_CODE) == 0 || section->_raw_size == 0) | |
1150 | continue; | |
1151 | ||
1152 | if (section->reloc_count != 0) | |
1153 | { | |
1154 | /* Get a copy of the native relocations. */ | |
1155 | internal_relocs = (_bfd_elf32_link_read_relocs | |
1156 | (input_bfd, section, (PTR) NULL, | |
1157 | (Elf_Internal_Rela *) NULL, | |
1158 | link_info->keep_memory)); | |
1159 | if (internal_relocs == NULL) | |
1160 | goto error_return; | |
1161 | if (! link_info->keep_memory) | |
1162 | free_relocs = internal_relocs; | |
1163 | } | |
1164 | ||
1165 | /* Get cached copy of section contents if it exists. */ | |
1166 | if (elf_section_data (section)->this_hdr.contents != NULL) | |
1167 | contents = elf_section_data (section)->this_hdr.contents; | |
1168 | else | |
1169 | { | |
1170 | /* Go get them off disk. */ | |
1171 | contents = (bfd_byte *)bfd_malloc (section->_raw_size); | |
1172 | if (contents == NULL) | |
1173 | goto error_return; | |
1174 | free_contents = contents; | |
1175 | ||
1176 | if (!bfd_get_section_contents (input_bfd, section, | |
1177 | contents, (file_ptr) 0, | |
1178 | section->_raw_size)) | |
1179 | goto error_return; | |
1180 | } | |
1181 | ||
252b5132 RH |
1182 | shndx = _bfd_elf_section_from_bfd_section (input_bfd, section); |
1183 | ||
1184 | /* Now look for any function in this section which needs | |
1185 | insns deleted from its prologue. */ | |
1186 | esym = extsyms; | |
1187 | esymend = esym + symtab_hdr->sh_info; | |
1188 | for (; esym < esymend; esym++) | |
1189 | { | |
1190 | Elf_Internal_Sym isym; | |
1191 | struct elf32_mn10300_link_hash_entry *sym_hash; | |
86033394 | 1192 | asection *sym_sec = NULL; |
252b5132 | 1193 | const char *sym_name; |
252b5132 RH |
1194 | char *new_name; |
1195 | ||
1196 | bfd_elf32_swap_symbol_in (input_bfd, esym, &isym); | |
1197 | ||
1198 | if (isym.st_shndx != shndx) | |
1199 | continue; | |
1200 | ||
1201 | if (isym.st_shndx == SHN_UNDEF) | |
1202 | sym_sec = bfd_und_section_ptr; | |
1203 | else if (isym.st_shndx > 0 && isym.st_shndx < SHN_LORESERVE) | |
1204 | sym_sec | |
1205 | = bfd_section_from_elf_index (input_bfd, isym.st_shndx); | |
1206 | else if (isym.st_shndx == SHN_ABS) | |
1207 | sym_sec = bfd_abs_section_ptr; | |
1208 | else if (isym.st_shndx == SHN_COMMON) | |
1209 | sym_sec = bfd_com_section_ptr; | |
86033394 NC |
1210 | else |
1211 | abort (); | |
a7c10850 | 1212 | |
252b5132 RH |
1213 | sym_name = bfd_elf_string_from_elf_section (input_bfd, |
1214 | symtab_hdr->sh_link, | |
1215 | isym.st_name); | |
1216 | ||
1217 | /* Tack on an ID so we can uniquely identify this | |
1218 | local symbol in the global hash table. */ | |
1219 | new_name = bfd_malloc (strlen (sym_name) + 10); | |
1220 | if (new_name == 0) | |
1221 | goto error_return; | |
1222 | sprintf (new_name, "%s_%08x", sym_name, (int)sym_sec); | |
1223 | sym_name = new_name; | |
1224 | ||
1225 | sym_hash = (struct elf32_mn10300_link_hash_entry *) | |
1226 | elf_link_hash_lookup (&hash_table->static_hash_table->root, | |
1227 | sym_name, false, | |
1228 | false, false); | |
1229 | ||
1230 | free (new_name); | |
1231 | if (sym_hash == NULL) | |
1232 | continue; | |
1233 | ||
1234 | if (! ((sym_hash)->flags & MN10300_CONVERT_CALL_TO_CALLS) | |
1235 | && ! ((sym_hash)->flags & MN10300_DELETED_PROLOGUE_BYTES)) | |
1236 | { | |
1237 | int bytes = 0; | |
1238 | ||
1239 | /* Note that we've changed things. */ | |
1240 | elf_section_data (section)->relocs = internal_relocs; | |
1241 | free_relocs = NULL; | |
1242 | ||
1243 | elf_section_data (section)->this_hdr.contents = contents; | |
1244 | free_contents = NULL; | |
1245 | ||
1246 | symtab_hdr->contents = (bfd_byte *)extsyms; | |
1247 | free_extsyms = NULL; | |
1248 | ||
1249 | /* Count how many bytes we're going to delete. */ | |
1250 | if (sym_hash->movm_args) | |
1251 | bytes += 2; | |
1252 | ||
1253 | if (sym_hash->stack_size && sym_hash->stack_size <= 128) | |
1254 | bytes += 3; | |
1255 | else if (sym_hash->stack_size | |
1256 | && sym_hash->stack_size < 256) | |
1257 | bytes += 4; | |
1258 | ||
1259 | /* Note that we've deleted prologue bytes for this | |
1260 | function. */ | |
1261 | sym_hash->flags |= MN10300_DELETED_PROLOGUE_BYTES; | |
1262 | ||
1263 | /* Actually delete the bytes. */ | |
1264 | if (!mn10300_elf_relax_delete_bytes (input_bfd, | |
1265 | section, | |
1266 | isym.st_value, | |
1267 | bytes)) | |
1268 | goto error_return; | |
1269 | ||
1270 | /* Something changed. Not strictly necessary, but | |
1271 | may lead to more relaxing opportunities. */ | |
1272 | *again = true; | |
1273 | } | |
1274 | } | |
1275 | ||
1276 | /* Look for any global functions in this section which | |
1277 | need insns deleted from their prologues. */ | |
1278 | esym = extsyms + symtab_hdr->sh_info; | |
1279 | esymend = extsyms + (symtab_hdr->sh_size | |
1280 | / sizeof (Elf32_External_Sym)); | |
1281 | for (idx = 0; esym < esymend; esym++, idx++) | |
1282 | { | |
1283 | Elf_Internal_Sym isym; | |
1284 | struct elf32_mn10300_link_hash_entry *sym_hash; | |
1285 | ||
1286 | bfd_elf32_swap_symbol_in (input_bfd, esym, &isym); | |
1287 | sym_hash = (struct elf32_mn10300_link_hash_entry *) | |
1288 | (elf_sym_hashes (input_bfd)[idx]); | |
1289 | if (isym.st_shndx == shndx | |
1290 | && (sym_hash)->root.root.u.def.section == section | |
1291 | && ! ((sym_hash)->flags & MN10300_CONVERT_CALL_TO_CALLS) | |
1292 | && ! ((sym_hash)->flags & MN10300_DELETED_PROLOGUE_BYTES)) | |
1293 | { | |
1294 | int bytes = 0; | |
1295 | ||
1296 | /* Note that we've changed things. */ | |
1297 | elf_section_data (section)->relocs = internal_relocs; | |
1298 | free_relocs = NULL; | |
1299 | ||
1300 | elf_section_data (section)->this_hdr.contents = contents; | |
1301 | free_contents = NULL; | |
1302 | ||
1303 | symtab_hdr->contents = (bfd_byte *)extsyms; | |
1304 | free_extsyms = NULL; | |
1305 | ||
1306 | /* Count how many bytes we're going to delete. */ | |
1307 | if (sym_hash->movm_args) | |
1308 | bytes += 2; | |
1309 | ||
1310 | if (sym_hash->stack_size && sym_hash->stack_size <= 128) | |
1311 | bytes += 3; | |
1312 | else if (sym_hash->stack_size | |
1313 | && sym_hash->stack_size < 256) | |
1314 | bytes += 4; | |
1315 | ||
1316 | /* Note that we've deleted prologue bytes for this | |
1317 | function. */ | |
1318 | sym_hash->flags |= MN10300_DELETED_PROLOGUE_BYTES; | |
1319 | ||
1320 | /* Actually delete the bytes. */ | |
1321 | if (!mn10300_elf_relax_delete_bytes (input_bfd, | |
1322 | section, | |
1323 | (sym_hash)->root.root.u.def.value, | |
1324 | bytes)) | |
1325 | goto error_return; | |
1326 | ||
1327 | /* Something changed. Not strictly necessary, but | |
1328 | may lead to more relaxing opportunities. */ | |
1329 | *again = true; | |
1330 | } | |
1331 | } | |
1332 | ||
1333 | /* Cache or free any memory we allocated for the relocs. */ | |
1334 | if (free_relocs != NULL) | |
1335 | { | |
1336 | free (free_relocs); | |
1337 | free_relocs = NULL; | |
1338 | } | |
1339 | ||
1340 | /* Cache or free any memory we allocated for the contents. */ | |
1341 | if (free_contents != NULL) | |
1342 | { | |
1343 | if (! link_info->keep_memory) | |
1344 | free (free_contents); | |
1345 | else | |
1346 | { | |
1347 | /* Cache the section contents for elf_link_input_bfd. */ | |
1348 | elf_section_data (section)->this_hdr.contents = contents; | |
1349 | } | |
1350 | free_contents = NULL; | |
1351 | } | |
1352 | } | |
1353 | ||
1354 | /* Cache or free any memory we allocated for the symbols. */ | |
1355 | if (free_extsyms != NULL) | |
1356 | { | |
1357 | if (! link_info->keep_memory) | |
1358 | free (free_extsyms); | |
1359 | else | |
1360 | { | |
1361 | /* Cache the symbols for elf_link_input_bfd. */ | |
1362 | symtab_hdr->contents = extsyms; | |
1363 | } | |
1364 | free_extsyms = NULL; | |
1365 | } | |
1366 | } | |
1367 | } | |
1368 | ||
252b5132 RH |
1369 | /* (Re)initialize for the basic instruction shortening/relaxing pass. */ |
1370 | contents = NULL; | |
1371 | extsyms = NULL; | |
1372 | internal_relocs = NULL; | |
1373 | free_relocs = NULL; | |
1374 | free_contents = NULL; | |
1375 | free_extsyms = NULL; | |
1376 | ||
1377 | /* We don't have to do anything for a relocateable link, if | |
1378 | this section does not have relocs, or if this is not a | |
1379 | code section. */ | |
1380 | if (link_info->relocateable | |
1381 | || (sec->flags & SEC_RELOC) == 0 | |
1382 | || sec->reloc_count == 0 | |
1383 | || (sec->flags & SEC_CODE) == 0) | |
1384 | return true; | |
1385 | ||
1386 | /* If this is the first time we have been called for this section, | |
1387 | initialize the cooked size. */ | |
1388 | if (sec->_cooked_size == 0) | |
1389 | sec->_cooked_size = sec->_raw_size; | |
1390 | ||
1391 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
1392 | ||
1393 | /* Get a copy of the native relocations. */ | |
1394 | internal_relocs = (_bfd_elf32_link_read_relocs | |
1395 | (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL, | |
1396 | link_info->keep_memory)); | |
1397 | if (internal_relocs == NULL) | |
1398 | goto error_return; | |
1399 | if (! link_info->keep_memory) | |
1400 | free_relocs = internal_relocs; | |
1401 | ||
1402 | /* Walk through them looking for relaxing opportunities. */ | |
1403 | irelend = internal_relocs + sec->reloc_count; | |
1404 | for (irel = internal_relocs; irel < irelend; irel++) | |
1405 | { | |
1406 | bfd_vma symval; | |
1407 | struct elf32_mn10300_link_hash_entry *h = NULL; | |
1408 | ||
1409 | /* If this isn't something that can be relaxed, then ignore | |
1410 | this reloc. */ | |
1411 | if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_NONE | |
1412 | || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_8 | |
1413 | || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_MAX) | |
1414 | continue; | |
1415 | ||
1416 | /* Get the section contents if we haven't done so already. */ | |
1417 | if (contents == NULL) | |
1418 | { | |
1419 | /* Get cached copy if it exists. */ | |
1420 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
1421 | contents = elf_section_data (sec)->this_hdr.contents; | |
1422 | else | |
1423 | { | |
1424 | /* Go get them off disk. */ | |
1425 | contents = (bfd_byte *) bfd_malloc (sec->_raw_size); | |
1426 | if (contents == NULL) | |
1427 | goto error_return; | |
1428 | free_contents = contents; | |
1429 | ||
1430 | if (! bfd_get_section_contents (abfd, sec, contents, | |
1431 | (file_ptr) 0, sec->_raw_size)) | |
1432 | goto error_return; | |
1433 | } | |
1434 | } | |
1435 | ||
1436 | /* Read this BFD's symbols if we haven't done so already. */ | |
1437 | if (extsyms == NULL) | |
1438 | { | |
1439 | /* Get cached copy if it exists. */ | |
1440 | if (symtab_hdr->contents != NULL) | |
1441 | extsyms = (Elf32_External_Sym *) symtab_hdr->contents; | |
1442 | else | |
1443 | { | |
1444 | /* Go get them off disk. */ | |
1445 | extsyms = ((Elf32_External_Sym *) | |
1446 | bfd_malloc (symtab_hdr->sh_size)); | |
1447 | if (extsyms == NULL) | |
1448 | goto error_return; | |
1449 | free_extsyms = extsyms; | |
1450 | if (bfd_seek (abfd, symtab_hdr->sh_offset, SEEK_SET) != 0 | |
1451 | || (bfd_read (extsyms, 1, symtab_hdr->sh_size, abfd) | |
1452 | != symtab_hdr->sh_size)) | |
1453 | goto error_return; | |
1454 | } | |
1455 | } | |
1456 | ||
1457 | /* Get the value of the symbol referred to by the reloc. */ | |
1458 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) | |
1459 | { | |
1460 | Elf_Internal_Sym isym; | |
86033394 | 1461 | asection *sym_sec = NULL; |
252b5132 RH |
1462 | const char *sym_name; |
1463 | char *new_name; | |
1464 | ||
1465 | /* A local symbol. */ | |
1466 | bfd_elf32_swap_symbol_in (abfd, | |
1467 | extsyms + ELF32_R_SYM (irel->r_info), | |
1468 | &isym); | |
1469 | ||
1470 | if (isym.st_shndx == SHN_UNDEF) | |
1471 | sym_sec = bfd_und_section_ptr; | |
1472 | else if (isym.st_shndx > 0 && isym.st_shndx < SHN_LORESERVE) | |
1473 | sym_sec = bfd_section_from_elf_index (abfd, isym.st_shndx); | |
1474 | else if (isym.st_shndx == SHN_ABS) | |
1475 | sym_sec = bfd_abs_section_ptr; | |
1476 | else if (isym.st_shndx == SHN_COMMON) | |
1477 | sym_sec = bfd_com_section_ptr; | |
86033394 NC |
1478 | else |
1479 | abort (); | |
a7c10850 | 1480 | |
252b5132 RH |
1481 | symval = (isym.st_value |
1482 | + sym_sec->output_section->vma | |
1483 | + sym_sec->output_offset); | |
1484 | sym_name = bfd_elf_string_from_elf_section (abfd, | |
1485 | symtab_hdr->sh_link, | |
1486 | isym.st_name); | |
1487 | ||
1488 | /* Tack on an ID so we can uniquely identify this | |
1489 | local symbol in the global hash table. */ | |
1490 | new_name = bfd_malloc (strlen (sym_name) + 10); | |
1491 | if (new_name == 0) | |
1492 | goto error_return; | |
1493 | sprintf (new_name, "%s_%08x", sym_name, (int)sym_sec); | |
1494 | sym_name = new_name; | |
1495 | ||
1496 | h = (struct elf32_mn10300_link_hash_entry *) | |
1497 | elf_link_hash_lookup (&hash_table->static_hash_table->root, | |
1498 | sym_name, false, false, false); | |
1499 | free (new_name); | |
1500 | } | |
1501 | else | |
1502 | { | |
1503 | unsigned long indx; | |
1504 | ||
1505 | /* An external symbol. */ | |
1506 | indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; | |
1507 | h = (struct elf32_mn10300_link_hash_entry *) | |
1508 | (elf_sym_hashes (abfd)[indx]); | |
1509 | BFD_ASSERT (h != NULL); | |
1510 | if (h->root.root.type != bfd_link_hash_defined | |
1511 | && h->root.root.type != bfd_link_hash_defweak) | |
1512 | { | |
1513 | /* This appears to be a reference to an undefined | |
1514 | symbol. Just ignore it--it will be caught by the | |
1515 | regular reloc processing. */ | |
1516 | continue; | |
1517 | } | |
1518 | ||
1519 | symval = (h->root.root.u.def.value | |
1520 | + h->root.root.u.def.section->output_section->vma | |
1521 | + h->root.root.u.def.section->output_offset); | |
1522 | } | |
1523 | ||
1524 | /* For simplicity of coding, we are going to modify the section | |
1525 | contents, the section relocs, and the BFD symbol table. We | |
1526 | must tell the rest of the code not to free up this | |
1527 | information. It would be possible to instead create a table | |
1528 | of changes which have to be made, as is done in coff-mips.c; | |
1529 | that would be more work, but would require less memory when | |
1530 | the linker is run. */ | |
1531 | ||
1532 | /* Try to turn a 32bit pc-relative branch/call into a 16bit pc-relative | |
1533 | branch/call, also deal with "call" -> "calls" conversions and | |
1534 | insertion of prologue data into "call" instructions. */ | |
1535 | if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL32) | |
1536 | { | |
1537 | bfd_vma value = symval; | |
1538 | ||
1539 | /* If we've got a "call" instruction that needs to be turned | |
1540 | into a "calls" instruction, do so now. It saves a byte. */ | |
1541 | if (h && (h->flags & MN10300_CONVERT_CALL_TO_CALLS)) | |
1542 | { | |
1543 | unsigned char code; | |
1544 | ||
1545 | /* Get the opcode. */ | |
1546 | code = bfd_get_8 (abfd, contents + irel->r_offset - 1); | |
1547 | ||
1548 | /* Make sure we're working with a "call" instruction! */ | |
1549 | if (code == 0xdd) | |
1550 | { | |
1551 | /* Note that we've changed the relocs, section contents, | |
1552 | etc. */ | |
1553 | elf_section_data (sec)->relocs = internal_relocs; | |
1554 | free_relocs = NULL; | |
1555 | ||
1556 | elf_section_data (sec)->this_hdr.contents = contents; | |
1557 | free_contents = NULL; | |
1558 | ||
1559 | symtab_hdr->contents = (bfd_byte *) extsyms; | |
1560 | free_extsyms = NULL; | |
1561 | ||
1562 | /* Fix the opcode. */ | |
1563 | bfd_put_8 (abfd, 0xfc, contents + irel->r_offset - 1); | |
1564 | bfd_put_8 (abfd, 0xff, contents + irel->r_offset); | |
1565 | ||
1566 | /* Fix irel->r_offset and irel->r_addend. */ | |
1567 | irel->r_offset += 1; | |
1568 | irel->r_addend += 1; | |
1569 | ||
1570 | /* Delete one byte of data. */ | |
1571 | if (!mn10300_elf_relax_delete_bytes (abfd, sec, | |
1572 | irel->r_offset + 3, 1)) | |
1573 | goto error_return; | |
1574 | ||
1575 | /* That will change things, so, we should relax again. | |
1576 | Note that this is not required, and it may be slow. */ | |
1577 | *again = true; | |
1578 | } | |
1579 | } | |
1580 | else if (h) | |
1581 | { | |
1582 | /* We've got a "call" instruction which needs some data | |
1583 | from target function filled in. */ | |
1584 | unsigned char code; | |
1585 | ||
1586 | /* Get the opcode. */ | |
1587 | code = bfd_get_8 (abfd, contents + irel->r_offset - 1); | |
1588 | ||
1589 | /* Insert data from the target function into the "call" | |
1590 | instruction if needed. */ | |
1591 | if (code == 0xdd) | |
1592 | { | |
1593 | bfd_put_8 (abfd, h->movm_args, contents + irel->r_offset + 4); | |
1594 | bfd_put_8 (abfd, h->stack_size + h->movm_stack_size, | |
1595 | contents + irel->r_offset + 5); | |
1596 | } | |
1597 | } | |
1598 | ||
1599 | /* Deal with pc-relative gunk. */ | |
1600 | value -= (sec->output_section->vma + sec->output_offset); | |
1601 | value -= irel->r_offset; | |
1602 | value += irel->r_addend; | |
1603 | ||
1604 | /* See if the value will fit in 16 bits, note the high value is | |
1605 | 0x7fff + 2 as the target will be two bytes closer if we are | |
1606 | able to relax. */ | |
1607 | if ((long)value < 0x8001 && (long)value > -0x8000) | |
1608 | { | |
1609 | unsigned char code; | |
1610 | ||
1611 | /* Get the opcode. */ | |
1612 | code = bfd_get_8 (abfd, contents + irel->r_offset - 1); | |
1613 | ||
1614 | if (code != 0xdc && code != 0xdd && code != 0xff) | |
1615 | continue; | |
1616 | ||
1617 | /* Note that we've changed the relocs, section contents, etc. */ | |
1618 | elf_section_data (sec)->relocs = internal_relocs; | |
1619 | free_relocs = NULL; | |
1620 | ||
1621 | elf_section_data (sec)->this_hdr.contents = contents; | |
1622 | free_contents = NULL; | |
1623 | ||
1624 | symtab_hdr->contents = (bfd_byte *) extsyms; | |
1625 | free_extsyms = NULL; | |
1626 | ||
1627 | /* Fix the opcode. */ | |
1628 | if (code == 0xdc) | |
1629 | bfd_put_8 (abfd, 0xcc, contents + irel->r_offset - 1); | |
1630 | else if (code == 0xdd) | |
1631 | bfd_put_8 (abfd, 0xcd, contents + irel->r_offset - 1); | |
1632 | else if (code == 0xff) | |
1633 | bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2); | |
1634 | ||
1635 | /* Fix the relocation's type. */ | |
1636 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
1637 | R_MN10300_PCREL16); | |
1638 | ||
1639 | /* Delete two bytes of data. */ | |
1640 | if (!mn10300_elf_relax_delete_bytes (abfd, sec, | |
1641 | irel->r_offset + 1, 2)) | |
1642 | goto error_return; | |
1643 | ||
1644 | /* That will change things, so, we should relax again. | |
1645 | Note that this is not required, and it may be slow. */ | |
1646 | *again = true; | |
1647 | } | |
1648 | } | |
1649 | ||
1650 | /* Try to turn a 16bit pc-relative branch into a 8bit pc-relative | |
1651 | branch. */ | |
1652 | if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL16) | |
1653 | { | |
1654 | bfd_vma value = symval; | |
1655 | ||
1656 | /* If we've got a "call" instruction that needs to be turned | |
1657 | into a "calls" instruction, do so now. It saves a byte. */ | |
1658 | if (h && (h->flags & MN10300_CONVERT_CALL_TO_CALLS)) | |
1659 | { | |
1660 | unsigned char code; | |
1661 | ||
1662 | /* Get the opcode. */ | |
1663 | code = bfd_get_8 (abfd, contents + irel->r_offset - 1); | |
1664 | ||
1665 | /* Make sure we're working with a "call" instruction! */ | |
1666 | if (code == 0xcd) | |
1667 | { | |
1668 | /* Note that we've changed the relocs, section contents, | |
1669 | etc. */ | |
1670 | elf_section_data (sec)->relocs = internal_relocs; | |
1671 | free_relocs = NULL; | |
1672 | ||
1673 | elf_section_data (sec)->this_hdr.contents = contents; | |
1674 | free_contents = NULL; | |
1675 | ||
1676 | symtab_hdr->contents = (bfd_byte *) extsyms; | |
1677 | free_extsyms = NULL; | |
1678 | ||
1679 | /* Fix the opcode. */ | |
1680 | bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 1); | |
1681 | bfd_put_8 (abfd, 0xff, contents + irel->r_offset); | |
1682 | ||
1683 | /* Fix irel->r_offset and irel->r_addend. */ | |
1684 | irel->r_offset += 1; | |
1685 | irel->r_addend += 1; | |
1686 | ||
1687 | /* Delete one byte of data. */ | |
1688 | if (!mn10300_elf_relax_delete_bytes (abfd, sec, | |
1689 | irel->r_offset + 1, 1)) | |
1690 | goto error_return; | |
1691 | ||
1692 | /* That will change things, so, we should relax again. | |
1693 | Note that this is not required, and it may be slow. */ | |
1694 | *again = true; | |
1695 | } | |
1696 | } | |
1697 | else if (h) | |
1698 | { | |
1699 | unsigned char code; | |
1700 | ||
1701 | /* Get the opcode. */ | |
1702 | code = bfd_get_8 (abfd, contents + irel->r_offset - 1); | |
1703 | ||
1704 | /* Insert data from the target function into the "call" | |
1705 | instruction if needed. */ | |
1706 | if (code == 0xcd) | |
1707 | { | |
1708 | bfd_put_8 (abfd, h->movm_args, contents + irel->r_offset + 2); | |
1709 | bfd_put_8 (abfd, h->stack_size + h->movm_stack_size, | |
1710 | contents + irel->r_offset + 3); | |
1711 | } | |
1712 | } | |
1713 | ||
1714 | /* Deal with pc-relative gunk. */ | |
1715 | value -= (sec->output_section->vma + sec->output_offset); | |
1716 | value -= irel->r_offset; | |
1717 | value += irel->r_addend; | |
1718 | ||
1719 | /* See if the value will fit in 8 bits, note the high value is | |
1720 | 0x7f + 1 as the target will be one bytes closer if we are | |
1721 | able to relax. */ | |
1722 | if ((long)value < 0x80 && (long)value > -0x80) | |
1723 | { | |
1724 | unsigned char code; | |
1725 | ||
1726 | /* Get the opcode. */ | |
1727 | code = bfd_get_8 (abfd, contents + irel->r_offset - 1); | |
1728 | ||
1729 | if (code != 0xcc) | |
1730 | continue; | |
1731 | ||
1732 | /* Note that we've changed the relocs, section contents, etc. */ | |
1733 | elf_section_data (sec)->relocs = internal_relocs; | |
1734 | free_relocs = NULL; | |
1735 | ||
1736 | elf_section_data (sec)->this_hdr.contents = contents; | |
1737 | free_contents = NULL; | |
1738 | ||
1739 | symtab_hdr->contents = (bfd_byte *) extsyms; | |
1740 | free_extsyms = NULL; | |
1741 | ||
1742 | /* Fix the opcode. */ | |
1743 | bfd_put_8 (abfd, 0xca, contents + irel->r_offset - 1); | |
1744 | ||
1745 | /* Fix the relocation's type. */ | |
1746 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
1747 | R_MN10300_PCREL8); | |
1748 | ||
1749 | /* Delete one byte of data. */ | |
1750 | if (!mn10300_elf_relax_delete_bytes (abfd, sec, | |
1751 | irel->r_offset + 1, 1)) | |
1752 | goto error_return; | |
1753 | ||
1754 | /* That will change things, so, we should relax again. | |
1755 | Note that this is not required, and it may be slow. */ | |
1756 | *again = true; | |
1757 | } | |
1758 | } | |
1759 | ||
1760 | /* Try to eliminate an unconditional 8 bit pc-relative branch | |
1761 | which immediately follows a conditional 8 bit pc-relative | |
1762 | branch around the unconditional branch. | |
1763 | ||
1764 | original: new: | |
1765 | bCC lab1 bCC' lab2 | |
1766 | bra lab2 | |
1767 | lab1: lab1: | |
1768 | ||
252b5132 RH |
1769 | This happens when the bCC can't reach lab2 at assembly time, |
1770 | but due to other relaxations it can reach at link time. */ | |
1771 | if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL8) | |
1772 | { | |
1773 | Elf_Internal_Rela *nrel; | |
1774 | bfd_vma value = symval; | |
1775 | unsigned char code; | |
1776 | ||
1777 | /* Deal with pc-relative gunk. */ | |
1778 | value -= (sec->output_section->vma + sec->output_offset); | |
1779 | value -= irel->r_offset; | |
1780 | value += irel->r_addend; | |
1781 | ||
1782 | /* Do nothing if this reloc is the last byte in the section. */ | |
1783 | if (irel->r_offset == sec->_cooked_size) | |
1784 | continue; | |
1785 | ||
1786 | /* See if the next instruction is an unconditional pc-relative | |
1787 | branch, more often than not this test will fail, so we | |
1788 | test it first to speed things up. */ | |
1789 | code = bfd_get_8 (abfd, contents + irel->r_offset + 1); | |
1790 | if (code != 0xca) | |
1791 | continue; | |
1792 | ||
1793 | /* Also make sure the next relocation applies to the next | |
1794 | instruction and that it's a pc-relative 8 bit branch. */ | |
1795 | nrel = irel + 1; | |
1796 | if (nrel == irelend | |
1797 | || irel->r_offset + 2 != nrel->r_offset | |
1798 | || ELF32_R_TYPE (nrel->r_info) != (int) R_MN10300_PCREL8) | |
1799 | continue; | |
1800 | ||
1801 | /* Make sure our destination immediately follows the | |
1802 | unconditional branch. */ | |
1803 | if (symval != (sec->output_section->vma + sec->output_offset | |
1804 | + irel->r_offset + 3)) | |
1805 | continue; | |
1806 | ||
1807 | /* Now make sure we are a conditional branch. This may not | |
1808 | be necessary, but why take the chance. | |
1809 | ||
1810 | Note these checks assume that R_MN10300_PCREL8 relocs | |
1811 | only occur on bCC and bCCx insns. If they occured | |
1812 | elsewhere, we'd need to know the start of this insn | |
1813 | for this check to be accurate. */ | |
1814 | code = bfd_get_8 (abfd, contents + irel->r_offset - 1); | |
1815 | if (code != 0xc0 && code != 0xc1 && code != 0xc2 | |
1816 | && code != 0xc3 && code != 0xc4 && code != 0xc5 | |
1817 | && code != 0xc6 && code != 0xc7 && code != 0xc8 | |
1818 | && code != 0xc9 && code != 0xe8 && code != 0xe9 | |
1819 | && code != 0xea && code != 0xeb) | |
1820 | continue; | |
1821 | ||
1822 | /* We also have to be sure there is no symbol/label | |
1823 | at the unconditional branch. */ | |
1824 | if (mn10300_elf_symbol_address_p (abfd, sec, extsyms, | |
1825 | irel->r_offset + 1)) | |
1826 | continue; | |
1827 | ||
1828 | /* Note that we've changed the relocs, section contents, etc. */ | |
1829 | elf_section_data (sec)->relocs = internal_relocs; | |
1830 | free_relocs = NULL; | |
1831 | ||
1832 | elf_section_data (sec)->this_hdr.contents = contents; | |
1833 | free_contents = NULL; | |
1834 | ||
1835 | symtab_hdr->contents = (bfd_byte *) extsyms; | |
1836 | free_extsyms = NULL; | |
1837 | ||
1838 | /* Reverse the condition of the first branch. */ | |
1839 | switch (code) | |
1840 | { | |
1841 | case 0xc8: | |
1842 | code = 0xc9; | |
1843 | break; | |
1844 | case 0xc9: | |
1845 | code = 0xc8; | |
1846 | break; | |
1847 | case 0xc0: | |
1848 | code = 0xc2; | |
1849 | break; | |
1850 | case 0xc2: | |
1851 | code = 0xc0; | |
1852 | break; | |
1853 | case 0xc3: | |
1854 | code = 0xc1; | |
1855 | break; | |
1856 | case 0xc1: | |
1857 | code = 0xc3; | |
1858 | break; | |
1859 | case 0xc4: | |
1860 | code = 0xc6; | |
1861 | break; | |
1862 | case 0xc6: | |
1863 | code = 0xc4; | |
1864 | break; | |
1865 | case 0xc7: | |
1866 | code = 0xc5; | |
1867 | break; | |
1868 | case 0xc5: | |
1869 | code = 0xc7; | |
1870 | break; | |
1871 | case 0xe8: | |
1872 | code = 0xe9; | |
1873 | break; | |
1874 | case 0x9d: | |
1875 | code = 0xe8; | |
1876 | break; | |
1877 | case 0xea: | |
1878 | code = 0xeb; | |
1879 | break; | |
1880 | case 0xeb: | |
1881 | code = 0xea; | |
1882 | break; | |
1883 | } | |
1884 | bfd_put_8 (abfd, code, contents + irel->r_offset - 1); | |
1885 | ||
1886 | /* Set the reloc type and symbol for the first branch | |
1887 | from the second branch. */ | |
1888 | irel->r_info = nrel->r_info; | |
1889 | ||
1890 | /* Make the reloc for the second branch a null reloc. */ | |
1891 | nrel->r_info = ELF32_R_INFO (ELF32_R_SYM (nrel->r_info), | |
1892 | R_MN10300_NONE); | |
1893 | ||
1894 | /* Delete two bytes of data. */ | |
1895 | if (!mn10300_elf_relax_delete_bytes (abfd, sec, | |
1896 | irel->r_offset + 1, 2)) | |
1897 | goto error_return; | |
1898 | ||
1899 | /* That will change things, so, we should relax again. | |
1900 | Note that this is not required, and it may be slow. */ | |
1901 | *again = true; | |
1902 | } | |
1903 | ||
31f8dc8f JL |
1904 | /* Try to turn a 24 immediate, displacement or absolute address |
1905 | into a 8 immediate, displacement or absolute address. */ | |
1906 | if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_24) | |
1907 | { | |
1908 | bfd_vma value = symval; | |
1909 | value += irel->r_addend; | |
1910 | ||
1911 | /* See if the value will fit in 8 bits. */ | |
1912 | if ((long)value < 0x7f && (long)value > -0x80) | |
1913 | { | |
1914 | unsigned char code; | |
1915 | ||
1916 | /* AM33 insns which have 24 operands are 6 bytes long and | |
1917 | will have 0xfd as the first byte. */ | |
1918 | ||
1919 | /* Get the first opcode. */ | |
1920 | code = bfd_get_8 (abfd, contents + irel->r_offset - 3); | |
1921 | ||
1922 | if (code == 0xfd) | |
1923 | { | |
1924 | /* Get the second opcode. */ | |
1925 | code = bfd_get_8 (abfd, contents + irel->r_offset - 2); | |
1926 | ||
1927 | /* We can not relax 0x6b, 0x7b, 0x8b, 0x9b as no 24bit | |
1928 | equivalent instructions exists. */ | |
1929 | if (code != 0x6b && code != 0x7b | |
1930 | && code != 0x8b && code != 0x9b | |
1931 | && ((code & 0x0f) == 0x09 || (code & 0x0f) == 0x08 | |
1932 | || (code & 0x0f) == 0x0a || (code & 0x0f) == 0x0b | |
1933 | || (code & 0x0f) == 0x0e)) | |
1934 | { | |
1935 | /* Not safe if the high bit is on as relaxing may | |
1936 | move the value out of high mem and thus not fit | |
1937 | in a signed 8bit value. This is currently over | |
1938 | conservative. */ | |
1939 | if ((value & 0x80) == 0) | |
1940 | { | |
1941 | /* Note that we've changed the relocation contents, | |
1942 | etc. */ | |
1943 | elf_section_data (sec)->relocs = internal_relocs; | |
1944 | free_relocs = NULL; | |
1945 | ||
1946 | elf_section_data (sec)->this_hdr.contents = contents; | |
1947 | free_contents = NULL; | |
1948 | ||
1949 | symtab_hdr->contents = (bfd_byte *) extsyms; | |
1950 | free_extsyms = NULL; | |
1951 | ||
1952 | /* Fix the opcode. */ | |
1953 | bfd_put_8 (abfd, 0xfb, contents + irel->r_offset - 3); | |
1954 | bfd_put_8 (abfd, code, contents + irel->r_offset - 2); | |
1955 | ||
1956 | /* Fix the relocation's type. */ | |
1957 | irel->r_info | |
1958 | = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
1959 | R_MN10300_8); | |
1960 | ||
1961 | /* Delete two bytes of data. */ | |
1962 | if (!mn10300_elf_relax_delete_bytes (abfd, sec, | |
1963 | irel->r_offset + 1, 2)) | |
1964 | goto error_return; | |
1965 | ||
1966 | /* That will change things, so, we should relax | |
1967 | again. Note that this is not required, and it | |
1968 | may be slow. */ | |
1969 | *again = true; | |
1970 | break; | |
1971 | } | |
1972 | } | |
1973 | ||
1974 | } | |
1975 | } | |
1976 | } | |
252b5132 RH |
1977 | |
1978 | /* Try to turn a 32bit immediate, displacement or absolute address | |
1979 | into a 16bit immediate, displacement or absolute address. */ | |
1980 | if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_32) | |
1981 | { | |
1982 | bfd_vma value = symval; | |
1983 | value += irel->r_addend; | |
1984 | ||
31f8dc8f JL |
1985 | /* See if the value will fit in 24 bits. |
1986 | We allow any 16bit match here. We prune those we can't | |
1987 | handle below. */ | |
1988 | if ((long)value < 0x7fffff && (long)value > -0x800000) | |
1989 | { | |
1990 | unsigned char code; | |
1991 | ||
1992 | /* AM33 insns which have 32bit operands are 7 bytes long and | |
1993 | will have 0xfe as the first byte. */ | |
1994 | ||
1995 | /* Get the first opcode. */ | |
1996 | code = bfd_get_8 (abfd, contents + irel->r_offset - 3); | |
1997 | ||
1998 | if (code == 0xfe) | |
1999 | { | |
2000 | /* Get the second opcode. */ | |
2001 | code = bfd_get_8 (abfd, contents + irel->r_offset - 2); | |
2002 | ||
2003 | /* All the am33 32 -> 24 relaxing possibilities. */ | |
2004 | /* We can not relax 0x6b, 0x7b, 0x8b, 0x9b as no 24bit | |
2005 | equivalent instructions exists. */ | |
2006 | if (code != 0x6b && code != 0x7b | |
2007 | && code != 0x8b && code != 0x9b | |
2008 | && ((code & 0x0f) == 0x09 || (code & 0x0f) == 0x08 | |
2009 | || (code & 0x0f) == 0x0a || (code & 0x0f) == 0x0b | |
2010 | || (code & 0x0f) == 0x0e)) | |
2011 | { | |
2012 | /* Not safe if the high bit is on as relaxing may | |
2013 | move the value out of high mem and thus not fit | |
2014 | in a signed 16bit value. This is currently over | |
2015 | conservative. */ | |
2016 | if ((value & 0x8000) == 0) | |
2017 | { | |
2018 | /* Note that we've changed the relocation contents, | |
2019 | etc. */ | |
2020 | elf_section_data (sec)->relocs = internal_relocs; | |
2021 | free_relocs = NULL; | |
2022 | ||
2023 | elf_section_data (sec)->this_hdr.contents = contents; | |
2024 | free_contents = NULL; | |
2025 | ||
2026 | symtab_hdr->contents = (bfd_byte *) extsyms; | |
2027 | free_extsyms = NULL; | |
2028 | ||
2029 | /* Fix the opcode. */ | |
2030 | bfd_put_8 (abfd, 0xfd, contents + irel->r_offset - 3); | |
2031 | bfd_put_8 (abfd, code, contents + irel->r_offset - 2); | |
2032 | ||
2033 | /* Fix the relocation's type. */ | |
2034 | irel->r_info | |
2035 | = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
2036 | R_MN10300_24); | |
2037 | ||
2038 | /* Delete one byte of data. */ | |
2039 | if (!mn10300_elf_relax_delete_bytes (abfd, sec, | |
2040 | irel->r_offset + 3, 1)) | |
2041 | goto error_return; | |
2042 | ||
2043 | /* That will change things, so, we should relax | |
2044 | again. Note that this is not required, and it | |
2045 | may be slow. */ | |
2046 | *again = true; | |
2047 | break; | |
2048 | } | |
2049 | } | |
2050 | ||
2051 | } | |
2052 | } | |
252b5132 RH |
2053 | |
2054 | /* See if the value will fit in 16 bits. | |
2055 | We allow any 16bit match here. We prune those we can't | |
2056 | handle below. */ | |
2057 | if ((long)value < 0x7fff && (long)value > -0x8000) | |
2058 | { | |
2059 | unsigned char code; | |
2060 | ||
2061 | /* Most insns which have 32bit operands are 6 bytes long; | |
2062 | exceptions are pcrel insns and bit insns. | |
2063 | ||
2064 | We handle pcrel insns above. We don't bother trying | |
2065 | to handle the bit insns here. | |
2066 | ||
2067 | The first byte of the remaining insns will be 0xfc. */ | |
2068 | ||
2069 | /* Get the first opcode. */ | |
2070 | code = bfd_get_8 (abfd, contents + irel->r_offset - 2); | |
2071 | ||
2072 | if (code != 0xfc) | |
2073 | continue; | |
2074 | ||
2075 | /* Get the second opcode. */ | |
2076 | code = bfd_get_8 (abfd, contents + irel->r_offset - 1); | |
2077 | ||
2078 | if ((code & 0xf0) < 0x80) | |
2079 | switch (code & 0xf0) | |
2080 | { | |
2081 | /* mov (d32,am),dn -> mov (d32,am),dn | |
2082 | mov dm,(d32,am) -> mov dn,(d32,am) | |
2083 | mov (d32,am),an -> mov (d32,am),an | |
2084 | mov dm,(d32,am) -> mov dn,(d32,am) | |
2085 | movbu (d32,am),dn -> movbu (d32,am),dn | |
2086 | movbu dm,(d32,am) -> movbu dn,(d32,am) | |
2087 | movhu (d32,am),dn -> movhu (d32,am),dn | |
2088 | movhu dm,(d32,am) -> movhu dn,(d32,am) */ | |
2089 | case 0x00: | |
2090 | case 0x10: | |
2091 | case 0x20: | |
2092 | case 0x30: | |
2093 | case 0x40: | |
2094 | case 0x50: | |
2095 | case 0x60: | |
2096 | case 0x70: | |
2097 | /* Not safe if the high bit is on as relaxing may | |
2098 | move the value out of high mem and thus not fit | |
2099 | in a signed 16bit value. */ | |
2100 | if (code == 0xcc | |
2101 | && (value & 0x8000)) | |
2102 | continue; | |
2103 | ||
2104 | /* Note that we've changed the relocation contents, etc. */ | |
2105 | elf_section_data (sec)->relocs = internal_relocs; | |
2106 | free_relocs = NULL; | |
2107 | ||
2108 | elf_section_data (sec)->this_hdr.contents = contents; | |
2109 | free_contents = NULL; | |
2110 | ||
2111 | symtab_hdr->contents = (bfd_byte *) extsyms; | |
2112 | free_extsyms = NULL; | |
2113 | ||
2114 | /* Fix the opcode. */ | |
2115 | bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2); | |
2116 | bfd_put_8 (abfd, code, contents + irel->r_offset - 1); | |
2117 | ||
2118 | /* Fix the relocation's type. */ | |
2119 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
2120 | R_MN10300_16); | |
2121 | ||
2122 | /* Delete two bytes of data. */ | |
2123 | if (!mn10300_elf_relax_delete_bytes (abfd, sec, | |
2124 | irel->r_offset + 2, 2)) | |
2125 | goto error_return; | |
2126 | ||
2127 | /* That will change things, so, we should relax again. | |
2128 | Note that this is not required, and it may be slow. */ | |
2129 | *again = true; | |
2130 | break; | |
2131 | } | |
2132 | else if ((code & 0xf0) == 0x80 | |
2133 | || (code & 0xf0) == 0x90) | |
2134 | switch (code & 0xf3) | |
2135 | { | |
2136 | /* mov dn,(abs32) -> mov dn,(abs16) | |
2137 | movbu dn,(abs32) -> movbu dn,(abs16) | |
2138 | movhu dn,(abs32) -> movhu dn,(abs16) */ | |
2139 | case 0x81: | |
2140 | case 0x82: | |
2141 | case 0x83: | |
2142 | /* Note that we've changed the relocation contents, etc. */ | |
2143 | elf_section_data (sec)->relocs = internal_relocs; | |
2144 | free_relocs = NULL; | |
2145 | ||
2146 | elf_section_data (sec)->this_hdr.contents = contents; | |
2147 | free_contents = NULL; | |
2148 | ||
2149 | symtab_hdr->contents = (bfd_byte *) extsyms; | |
2150 | free_extsyms = NULL; | |
2151 | ||
2152 | if ((code & 0xf3) == 0x81) | |
2153 | code = 0x01 + (code & 0x0c); | |
2154 | else if ((code & 0xf3) == 0x82) | |
2155 | code = 0x02 + (code & 0x0c); | |
2156 | else if ((code & 0xf3) == 0x83) | |
2157 | code = 0x03 + (code & 0x0c); | |
2158 | else | |
2159 | abort (); | |
2160 | ||
2161 | /* Fix the opcode. */ | |
2162 | bfd_put_8 (abfd, code, contents + irel->r_offset - 2); | |
2163 | ||
2164 | /* Fix the relocation's type. */ | |
2165 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
2166 | R_MN10300_16); | |
2167 | ||
2168 | /* The opcode got shorter too, so we have to fix the | |
2169 | addend and offset too! */ | |
2170 | irel->r_offset -= 1; | |
2171 | ||
2172 | /* Delete three bytes of data. */ | |
2173 | if (!mn10300_elf_relax_delete_bytes (abfd, sec, | |
2174 | irel->r_offset + 1, 3)) | |
2175 | goto error_return; | |
2176 | ||
2177 | /* That will change things, so, we should relax again. | |
2178 | Note that this is not required, and it may be slow. */ | |
2179 | *again = true; | |
2180 | break; | |
2181 | ||
2182 | /* mov am,(abs32) -> mov am,(abs16) | |
2183 | mov am,(d32,sp) -> mov am,(d16,sp) | |
2184 | mov dm,(d32,sp) -> mov dm,(d32,sp) | |
2185 | movbu dm,(d32,sp) -> movbu dm,(d32,sp) | |
2186 | movhu dm,(d32,sp) -> movhu dm,(d32,sp) */ | |
2187 | case 0x80: | |
2188 | case 0x90: | |
2189 | case 0x91: | |
2190 | case 0x92: | |
2191 | case 0x93: | |
2192 | /* Note that we've changed the relocation contents, etc. */ | |
2193 | elf_section_data (sec)->relocs = internal_relocs; | |
2194 | free_relocs = NULL; | |
2195 | ||
2196 | elf_section_data (sec)->this_hdr.contents = contents; | |
2197 | free_contents = NULL; | |
2198 | ||
2199 | symtab_hdr->contents = (bfd_byte *) extsyms; | |
2200 | free_extsyms = NULL; | |
2201 | ||
2202 | /* Fix the opcode. */ | |
2203 | bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2); | |
2204 | bfd_put_8 (abfd, code, contents + irel->r_offset - 1); | |
2205 | ||
2206 | /* Fix the relocation's type. */ | |
2207 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
2208 | R_MN10300_16); | |
2209 | ||
2210 | /* Delete two bytes of data. */ | |
2211 | if (!mn10300_elf_relax_delete_bytes (abfd, sec, | |
2212 | irel->r_offset + 2, 2)) | |
2213 | goto error_return; | |
2214 | ||
2215 | /* That will change things, so, we should relax again. | |
2216 | Note that this is not required, and it may be slow. */ | |
2217 | *again = true; | |
2218 | break; | |
2219 | } | |
2220 | else if ((code & 0xf0) < 0xf0) | |
2221 | switch (code & 0xfc) | |
2222 | { | |
2223 | /* mov imm32,dn -> mov imm16,dn | |
2224 | mov imm32,an -> mov imm16,an | |
2225 | mov (abs32),dn -> mov (abs16),dn | |
2226 | movbu (abs32),dn -> movbu (abs16),dn | |
2227 | movhu (abs32),dn -> movhu (abs16),dn */ | |
2228 | case 0xcc: | |
2229 | case 0xdc: | |
2230 | case 0xa4: | |
2231 | case 0xa8: | |
2232 | case 0xac: | |
2233 | /* Not safe if the high bit is on as relaxing may | |
2234 | move the value out of high mem and thus not fit | |
2235 | in a signed 16bit value. */ | |
2236 | if (code == 0xcc | |
2237 | && (value & 0x8000)) | |
2238 | continue; | |
2239 | ||
2240 | /* Note that we've changed the relocation contents, etc. */ | |
2241 | elf_section_data (sec)->relocs = internal_relocs; | |
2242 | free_relocs = NULL; | |
2243 | ||
2244 | elf_section_data (sec)->this_hdr.contents = contents; | |
2245 | free_contents = NULL; | |
2246 | ||
2247 | symtab_hdr->contents = (bfd_byte *) extsyms; | |
2248 | free_extsyms = NULL; | |
2249 | ||
2250 | if ((code & 0xfc) == 0xcc) | |
2251 | code = 0x2c + (code & 0x03); | |
2252 | else if ((code & 0xfc) == 0xdc) | |
2253 | code = 0x24 + (code & 0x03); | |
2254 | else if ((code & 0xfc) == 0xa4) | |
2255 | code = 0x30 + (code & 0x03); | |
2256 | else if ((code & 0xfc) == 0xa8) | |
2257 | code = 0x34 + (code & 0x03); | |
2258 | else if ((code & 0xfc) == 0xac) | |
2259 | code = 0x38 + (code & 0x03); | |
2260 | else | |
2261 | abort (); | |
2262 | ||
2263 | /* Fix the opcode. */ | |
2264 | bfd_put_8 (abfd, code, contents + irel->r_offset - 2); | |
2265 | ||
2266 | /* Fix the relocation's type. */ | |
2267 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
2268 | R_MN10300_16); | |
2269 | ||
2270 | /* The opcode got shorter too, so we have to fix the | |
2271 | addend and offset too! */ | |
2272 | irel->r_offset -= 1; | |
2273 | ||
2274 | /* Delete three bytes of data. */ | |
2275 | if (!mn10300_elf_relax_delete_bytes (abfd, sec, | |
2276 | irel->r_offset + 1, 3)) | |
2277 | goto error_return; | |
2278 | ||
2279 | /* That will change things, so, we should relax again. | |
2280 | Note that this is not required, and it may be slow. */ | |
2281 | *again = true; | |
2282 | break; | |
2283 | ||
2284 | /* mov (abs32),an -> mov (abs16),an | |
2285 | mov (d32,sp),an -> mov (d32,sp),an | |
2286 | mov (d32,sp),dn -> mov (d32,sp),dn | |
2287 | movbu (d32,sp),dn -> movbu (d32,sp),dn | |
2288 | movhu (d32,sp),dn -> movhu (d32,sp),dn | |
2289 | add imm32,dn -> add imm16,dn | |
2290 | cmp imm32,dn -> cmp imm16,dn | |
2291 | add imm32,an -> add imm16,an | |
2292 | cmp imm32,an -> cmp imm16,an | |
2293 | and imm32,dn -> and imm32,dn | |
2294 | or imm32,dn -> or imm32,dn | |
2295 | xor imm32,dn -> xor imm32,dn | |
2296 | btst imm32,dn -> btst imm32,dn */ | |
2297 | ||
2298 | case 0xa0: | |
2299 | case 0xb0: | |
2300 | case 0xb1: | |
2301 | case 0xb2: | |
2302 | case 0xb3: | |
2303 | case 0xc0: | |
2304 | case 0xc8: | |
2305 | ||
2306 | case 0xd0: | |
2307 | case 0xd8: | |
2308 | case 0xe0: | |
2309 | case 0xe1: | |
2310 | case 0xe2: | |
2311 | case 0xe3: | |
2312 | /* Note that we've changed the relocation contents, etc. */ | |
2313 | elf_section_data (sec)->relocs = internal_relocs; | |
2314 | free_relocs = NULL; | |
2315 | ||
2316 | elf_section_data (sec)->this_hdr.contents = contents; | |
2317 | free_contents = NULL; | |
2318 | ||
2319 | symtab_hdr->contents = (bfd_byte *) extsyms; | |
2320 | free_extsyms = NULL; | |
2321 | ||
2322 | /* Fix the opcode. */ | |
2323 | bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2); | |
2324 | bfd_put_8 (abfd, code, contents + irel->r_offset - 1); | |
2325 | ||
2326 | /* Fix the relocation's type. */ | |
2327 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
2328 | R_MN10300_16); | |
2329 | ||
2330 | /* Delete two bytes of data. */ | |
2331 | if (!mn10300_elf_relax_delete_bytes (abfd, sec, | |
2332 | irel->r_offset + 2, 2)) | |
2333 | goto error_return; | |
2334 | ||
2335 | /* That will change things, so, we should relax again. | |
2336 | Note that this is not required, and it may be slow. */ | |
2337 | *again = true; | |
2338 | break; | |
2339 | } | |
2340 | else if (code == 0xfe) | |
2341 | { | |
2342 | /* add imm32,sp -> add imm16,sp */ | |
2343 | ||
2344 | /* Note that we've changed the relocation contents, etc. */ | |
2345 | elf_section_data (sec)->relocs = internal_relocs; | |
2346 | free_relocs = NULL; | |
2347 | ||
2348 | elf_section_data (sec)->this_hdr.contents = contents; | |
2349 | free_contents = NULL; | |
2350 | ||
2351 | symtab_hdr->contents = (bfd_byte *) extsyms; | |
2352 | free_extsyms = NULL; | |
2353 | ||
2354 | /* Fix the opcode. */ | |
2355 | bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2); | |
2356 | bfd_put_8 (abfd, 0xfe, contents + irel->r_offset - 1); | |
2357 | ||
2358 | /* Fix the relocation's type. */ | |
2359 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
2360 | R_MN10300_16); | |
2361 | ||
2362 | /* Delete two bytes of data. */ | |
2363 | if (!mn10300_elf_relax_delete_bytes (abfd, sec, | |
2364 | irel->r_offset + 2, 2)) | |
2365 | goto error_return; | |
2366 | ||
2367 | /* That will change things, so, we should relax again. | |
2368 | Note that this is not required, and it may be slow. */ | |
2369 | *again = true; | |
2370 | break; | |
2371 | } | |
2372 | } | |
2373 | } | |
2374 | } | |
2375 | ||
2376 | if (free_relocs != NULL) | |
2377 | { | |
2378 | free (free_relocs); | |
2379 | free_relocs = NULL; | |
2380 | } | |
2381 | ||
2382 | if (free_contents != NULL) | |
2383 | { | |
2384 | if (! link_info->keep_memory) | |
2385 | free (free_contents); | |
2386 | else | |
2387 | { | |
2388 | /* Cache the section contents for elf_link_input_bfd. */ | |
2389 | elf_section_data (sec)->this_hdr.contents = contents; | |
2390 | } | |
2391 | free_contents = NULL; | |
2392 | } | |
2393 | ||
2394 | if (free_extsyms != NULL) | |
2395 | { | |
2396 | if (! link_info->keep_memory) | |
2397 | free (free_extsyms); | |
2398 | else | |
2399 | { | |
2400 | /* Cache the symbols for elf_link_input_bfd. */ | |
2401 | symtab_hdr->contents = extsyms; | |
2402 | } | |
2403 | free_extsyms = NULL; | |
2404 | } | |
2405 | ||
2406 | return true; | |
2407 | ||
2408 | error_return: | |
2409 | if (free_relocs != NULL) | |
2410 | free (free_relocs); | |
2411 | if (free_contents != NULL) | |
2412 | free (free_contents); | |
2413 | if (free_extsyms != NULL) | |
2414 | free (free_extsyms); | |
2415 | return false; | |
2416 | } | |
2417 | ||
2418 | /* Compute the stack size and movm arguments for the function | |
2419 | referred to by HASH at address ADDR in section with | |
2420 | contents CONTENTS, store the information in the hash table. */ | |
2421 | static void | |
2422 | compute_function_info (abfd, hash, addr, contents) | |
2423 | bfd *abfd; | |
2424 | struct elf32_mn10300_link_hash_entry *hash; | |
2425 | bfd_vma addr; | |
2426 | unsigned char *contents; | |
2427 | { | |
2428 | unsigned char byte1, byte2; | |
2429 | /* We only care about a very small subset of the possible prologue | |
2430 | sequences here. Basically we look for: | |
2431 | ||
2432 | movm [d2,d3,a2,a3],sp (optional) | |
2433 | add <size>,sp (optional, and only for sizes which fit in an unsigned | |
2434 | 8 bit number) | |
2435 | ||
2436 | If we find anything else, we quit. */ | |
2437 | ||
2438 | /* Look for movm [regs],sp */ | |
2439 | byte1 = bfd_get_8 (abfd, contents + addr); | |
2440 | byte2 = bfd_get_8 (abfd, contents + addr + 1); | |
2441 | ||
2442 | if (byte1 == 0xcf) | |
2443 | { | |
2444 | hash->movm_args = byte2; | |
2445 | addr += 2; | |
2446 | byte1 = bfd_get_8 (abfd, contents + addr); | |
2447 | byte2 = bfd_get_8 (abfd, contents + addr + 1); | |
2448 | } | |
2449 | ||
2450 | /* Now figure out how much stack space will be allocated by the movm | |
2451 | instruction. We need this kept separate from the funtion's normal | |
2452 | stack space. */ | |
2453 | if (hash->movm_args) | |
2454 | { | |
2455 | /* Space for d2. */ | |
2456 | if (hash->movm_args & 0x80) | |
2457 | hash->movm_stack_size += 4; | |
2458 | ||
2459 | /* Space for d3. */ | |
2460 | if (hash->movm_args & 0x40) | |
2461 | hash->movm_stack_size += 4; | |
2462 | ||
2463 | /* Space for a2. */ | |
2464 | if (hash->movm_args & 0x20) | |
2465 | hash->movm_stack_size += 4; | |
2466 | ||
2467 | /* Space for a3. */ | |
2468 | if (hash->movm_args & 0x10) | |
2469 | hash->movm_stack_size += 4; | |
2470 | ||
2471 | /* "other" space. d0, d1, a0, a1, mdr, lir, lar, 4 byte pad. */ | |
2472 | if (hash->movm_args & 0x08) | |
2473 | hash->movm_stack_size += 8 * 4; | |
2474 | ||
31f8dc8f JL |
2475 | if (bfd_get_mach (abfd) == bfd_mach_am33) |
2476 | { | |
2477 | /* "exother" space. e0, e1, mdrq, mcrh, mcrl, mcvf */ | |
2478 | if (hash->movm_args & 0x1) | |
2479 | hash->movm_stack_size += 6 * 4; | |
2480 | ||
2481 | /* exreg1 space. e4, e5, e6, e7 */ | |
2482 | if (hash->movm_args & 0x2) | |
2483 | hash->movm_stack_size += 4 * 4; | |
2484 | ||
2485 | /* exreg0 space. e2, e3 */ | |
2486 | if (hash->movm_args & 0x4) | |
2487 | hash->movm_stack_size += 2 * 4; | |
2488 | } | |
252b5132 RH |
2489 | } |
2490 | ||
2491 | /* Now look for the two stack adjustment variants. */ | |
2492 | if (byte1 == 0xf8 && byte2 == 0xfe) | |
2493 | { | |
2494 | int temp = bfd_get_8 (abfd, contents + addr + 2); | |
2495 | temp = ((temp & 0xff) ^ (~0x7f)) + 0x80; | |
2496 | ||
2497 | hash->stack_size = -temp; | |
2498 | } | |
2499 | else if (byte1 == 0xfa && byte2 == 0xfe) | |
2500 | { | |
2501 | int temp = bfd_get_16 (abfd, contents + addr + 2); | |
2502 | temp = ((temp & 0xffff) ^ (~0x7fff)) + 0x8000; | |
2503 | temp = -temp; | |
2504 | ||
2505 | if (temp < 255) | |
2506 | hash->stack_size = temp; | |
2507 | } | |
2508 | ||
2509 | /* If the total stack to be allocated by the call instruction is more | |
2510 | than 255 bytes, then we can't remove the stack adjustment by using | |
2511 | "call" (we might still be able to remove the "movm" instruction. */ | |
2512 | if (hash->stack_size + hash->movm_stack_size > 255) | |
2513 | hash->stack_size = 0; | |
2514 | ||
2515 | return; | |
2516 | } | |
2517 | ||
2518 | /* Delete some bytes from a section while relaxing. */ | |
2519 | ||
2520 | static boolean | |
2521 | mn10300_elf_relax_delete_bytes (abfd, sec, addr, count) | |
2522 | bfd *abfd; | |
2523 | asection *sec; | |
2524 | bfd_vma addr; | |
2525 | int count; | |
2526 | { | |
2527 | Elf_Internal_Shdr *symtab_hdr; | |
2528 | Elf32_External_Sym *extsyms; | |
2529 | int shndx, index; | |
2530 | bfd_byte *contents; | |
2531 | Elf_Internal_Rela *irel, *irelend; | |
2532 | Elf_Internal_Rela *irelalign; | |
2533 | bfd_vma toaddr; | |
2534 | Elf32_External_Sym *esym, *esymend; | |
2535 | struct elf32_mn10300_link_hash_entry *sym_hash; | |
2536 | ||
2537 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
2538 | extsyms = (Elf32_External_Sym *) symtab_hdr->contents; | |
2539 | ||
2540 | shndx = _bfd_elf_section_from_bfd_section (abfd, sec); | |
2541 | ||
2542 | contents = elf_section_data (sec)->this_hdr.contents; | |
2543 | ||
2544 | /* The deletion must stop at the next ALIGN reloc for an aligment | |
2545 | power larger than the number of bytes we are deleting. */ | |
2546 | ||
2547 | irelalign = NULL; | |
2548 | toaddr = sec->_cooked_size; | |
2549 | ||
2550 | irel = elf_section_data (sec)->relocs; | |
2551 | irelend = irel + sec->reloc_count; | |
2552 | ||
2553 | /* Actually delete the bytes. */ | |
2554 | memmove (contents + addr, contents + addr + count, toaddr - addr - count); | |
2555 | sec->_cooked_size -= count; | |
2556 | ||
2557 | /* Adjust all the relocs. */ | |
2558 | for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++) | |
2559 | { | |
2560 | /* Get the new reloc address. */ | |
2561 | if ((irel->r_offset > addr | |
2562 | && irel->r_offset < toaddr)) | |
2563 | irel->r_offset -= count; | |
2564 | } | |
2565 | ||
2566 | /* Adjust the local symbols defined in this section. */ | |
2567 | esym = extsyms; | |
2568 | esymend = esym + symtab_hdr->sh_info; | |
2569 | for (; esym < esymend; esym++) | |
2570 | { | |
2571 | Elf_Internal_Sym isym; | |
2572 | ||
2573 | bfd_elf32_swap_symbol_in (abfd, esym, &isym); | |
2574 | ||
2575 | if (isym.st_shndx == shndx | |
2576 | && isym.st_value > addr | |
2577 | && isym.st_value < toaddr) | |
2578 | { | |
2579 | isym.st_value -= count; | |
2580 | bfd_elf32_swap_symbol_out (abfd, &isym, esym); | |
2581 | } | |
2582 | } | |
2583 | ||
2584 | /* Now adjust the global symbols defined in this section. */ | |
2585 | esym = extsyms + symtab_hdr->sh_info; | |
2586 | esymend = extsyms + (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)); | |
2587 | for (index = 0; esym < esymend; esym++, index++) | |
2588 | { | |
2589 | Elf_Internal_Sym isym; | |
2590 | ||
2591 | bfd_elf32_swap_symbol_in (abfd, esym, &isym); | |
2592 | sym_hash = (struct elf32_mn10300_link_hash_entry *) | |
2593 | (elf_sym_hashes (abfd)[index]); | |
2594 | if (isym.st_shndx == shndx | |
2595 | && ((sym_hash)->root.root.type == bfd_link_hash_defined | |
2596 | || (sym_hash)->root.root.type == bfd_link_hash_defweak) | |
2597 | && (sym_hash)->root.root.u.def.section == sec | |
2598 | && (sym_hash)->root.root.u.def.value > addr | |
2599 | && (sym_hash)->root.root.u.def.value < toaddr) | |
2600 | { | |
2601 | (sym_hash)->root.root.u.def.value -= count; | |
2602 | } | |
2603 | } | |
2604 | ||
2605 | return true; | |
2606 | } | |
2607 | ||
2608 | /* Return true if a symbol exists at the given address, else return | |
2609 | false. */ | |
2610 | static boolean | |
2611 | mn10300_elf_symbol_address_p (abfd, sec, extsyms, addr) | |
2612 | bfd *abfd; | |
2613 | asection *sec; | |
2614 | Elf32_External_Sym *extsyms; | |
2615 | bfd_vma addr; | |
2616 | { | |
2617 | Elf_Internal_Shdr *symtab_hdr; | |
2618 | int shndx; | |
2619 | Elf32_External_Sym *esym, *esymend; | |
2620 | struct elf32_mn10300_link_hash_entry **sym_hash, **sym_hash_end; | |
2621 | ||
2622 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
2623 | shndx = _bfd_elf_section_from_bfd_section (abfd, sec); | |
2624 | ||
2625 | /* Examine all the symbols. */ | |
2626 | esym = extsyms; | |
2627 | esymend = esym + symtab_hdr->sh_info; | |
2628 | for (; esym < esymend; esym++) | |
2629 | { | |
2630 | Elf_Internal_Sym isym; | |
2631 | ||
2632 | bfd_elf32_swap_symbol_in (abfd, esym, &isym); | |
2633 | ||
2634 | if (isym.st_shndx == shndx | |
2635 | && isym.st_value == addr) | |
2636 | return true; | |
2637 | } | |
2638 | ||
a7c10850 | 2639 | sym_hash = (struct elf32_mn10300_link_hash_entry **) (elf_sym_hashes (abfd)); |
252b5132 RH |
2640 | sym_hash_end = (sym_hash |
2641 | + (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) | |
2642 | - symtab_hdr->sh_info)); | |
2643 | for (; sym_hash < sym_hash_end; sym_hash++) | |
2644 | { | |
2645 | if (((*sym_hash)->root.root.type == bfd_link_hash_defined | |
2646 | || (*sym_hash)->root.root.type == bfd_link_hash_defweak) | |
2647 | && (*sym_hash)->root.root.u.def.section == sec | |
2648 | && (*sym_hash)->root.root.u.def.value == addr) | |
2649 | return true; | |
2650 | } | |
2651 | return false; | |
2652 | } | |
2653 | ||
2654 | /* This is a version of bfd_generic_get_relocated_section_contents | |
2655 | which uses mn10300_elf_relocate_section. */ | |
2656 | ||
2657 | static bfd_byte * | |
2658 | mn10300_elf_get_relocated_section_contents (output_bfd, link_info, link_order, | |
2659 | data, relocateable, symbols) | |
2660 | bfd *output_bfd; | |
2661 | struct bfd_link_info *link_info; | |
2662 | struct bfd_link_order *link_order; | |
2663 | bfd_byte *data; | |
2664 | boolean relocateable; | |
2665 | asymbol **symbols; | |
2666 | { | |
2667 | Elf_Internal_Shdr *symtab_hdr; | |
2668 | asection *input_section = link_order->u.indirect.section; | |
2669 | bfd *input_bfd = input_section->owner; | |
2670 | asection **sections = NULL; | |
2671 | Elf_Internal_Rela *internal_relocs = NULL; | |
2672 | Elf32_External_Sym *external_syms = NULL; | |
2673 | Elf_Internal_Sym *internal_syms = NULL; | |
2674 | ||
2675 | /* We only need to handle the case of relaxing, or of having a | |
2676 | particular set of section contents, specially. */ | |
2677 | if (relocateable | |
2678 | || elf_section_data (input_section)->this_hdr.contents == NULL) | |
2679 | return bfd_generic_get_relocated_section_contents (output_bfd, link_info, | |
2680 | link_order, data, | |
2681 | relocateable, | |
2682 | symbols); | |
2683 | ||
2684 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
2685 | ||
2686 | memcpy (data, elf_section_data (input_section)->this_hdr.contents, | |
2687 | input_section->_raw_size); | |
2688 | ||
2689 | if ((input_section->flags & SEC_RELOC) != 0 | |
2690 | && input_section->reloc_count > 0) | |
2691 | { | |
2692 | Elf_Internal_Sym *isymp; | |
2693 | asection **secpp; | |
2694 | Elf32_External_Sym *esym, *esymend; | |
2695 | ||
2696 | if (symtab_hdr->contents != NULL) | |
2697 | external_syms = (Elf32_External_Sym *) symtab_hdr->contents; | |
2698 | else | |
2699 | { | |
2700 | external_syms = ((Elf32_External_Sym *) | |
2701 | bfd_malloc (symtab_hdr->sh_info | |
2702 | * sizeof (Elf32_External_Sym))); | |
2703 | if (external_syms == NULL && symtab_hdr->sh_info > 0) | |
2704 | goto error_return; | |
2705 | if (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0 | |
2706 | || (bfd_read (external_syms, sizeof (Elf32_External_Sym), | |
2707 | symtab_hdr->sh_info, input_bfd) | |
2708 | != (symtab_hdr->sh_info * sizeof (Elf32_External_Sym)))) | |
2709 | goto error_return; | |
2710 | } | |
2711 | ||
2712 | internal_relocs = (_bfd_elf32_link_read_relocs | |
2713 | (input_bfd, input_section, (PTR) NULL, | |
2714 | (Elf_Internal_Rela *) NULL, false)); | |
2715 | if (internal_relocs == NULL) | |
2716 | goto error_return; | |
2717 | ||
2718 | internal_syms = ((Elf_Internal_Sym *) | |
2719 | bfd_malloc (symtab_hdr->sh_info | |
2720 | * sizeof (Elf_Internal_Sym))); | |
2721 | if (internal_syms == NULL && symtab_hdr->sh_info > 0) | |
2722 | goto error_return; | |
2723 | ||
2724 | sections = (asection **) bfd_malloc (symtab_hdr->sh_info | |
2725 | * sizeof (asection *)); | |
2726 | if (sections == NULL && symtab_hdr->sh_info > 0) | |
2727 | goto error_return; | |
2728 | ||
2729 | isymp = internal_syms; | |
2730 | secpp = sections; | |
2731 | esym = external_syms; | |
2732 | esymend = esym + symtab_hdr->sh_info; | |
2733 | for (; esym < esymend; ++esym, ++isymp, ++secpp) | |
2734 | { | |
2735 | asection *isec; | |
2736 | ||
2737 | bfd_elf32_swap_symbol_in (input_bfd, esym, isymp); | |
2738 | ||
2739 | if (isymp->st_shndx == SHN_UNDEF) | |
2740 | isec = bfd_und_section_ptr; | |
2741 | else if (isymp->st_shndx > 0 && isymp->st_shndx < SHN_LORESERVE) | |
2742 | isec = bfd_section_from_elf_index (input_bfd, isymp->st_shndx); | |
2743 | else if (isymp->st_shndx == SHN_ABS) | |
2744 | isec = bfd_abs_section_ptr; | |
2745 | else if (isymp->st_shndx == SHN_COMMON) | |
2746 | isec = bfd_com_section_ptr; | |
2747 | else | |
2748 | { | |
2749 | /* Who knows? */ | |
2750 | isec = NULL; | |
2751 | } | |
2752 | ||
2753 | *secpp = isec; | |
2754 | } | |
2755 | ||
2756 | if (! mn10300_elf_relocate_section (output_bfd, link_info, input_bfd, | |
2757 | input_section, data, internal_relocs, | |
2758 | internal_syms, sections)) | |
2759 | goto error_return; | |
2760 | ||
2761 | if (sections != NULL) | |
2762 | free (sections); | |
2763 | sections = NULL; | |
2764 | if (internal_syms != NULL) | |
2765 | free (internal_syms); | |
2766 | internal_syms = NULL; | |
2767 | if (external_syms != NULL && symtab_hdr->contents == NULL) | |
2768 | free (external_syms); | |
2769 | external_syms = NULL; | |
2770 | if (internal_relocs != elf_section_data (input_section)->relocs) | |
2771 | free (internal_relocs); | |
2772 | internal_relocs = NULL; | |
2773 | } | |
2774 | ||
2775 | return data; | |
2776 | ||
2777 | error_return: | |
2778 | if (internal_relocs != NULL | |
2779 | && internal_relocs != elf_section_data (input_section)->relocs) | |
2780 | free (internal_relocs); | |
2781 | if (external_syms != NULL && symtab_hdr->contents == NULL) | |
2782 | free (external_syms); | |
2783 | if (internal_syms != NULL) | |
2784 | free (internal_syms); | |
2785 | if (sections != NULL) | |
2786 | free (sections); | |
2787 | return NULL; | |
2788 | } | |
2789 | ||
2790 | /* Assorted hash table functions. */ | |
2791 | ||
2792 | /* Initialize an entry in the link hash table. */ | |
2793 | ||
2794 | /* Create an entry in an MN10300 ELF linker hash table. */ | |
2795 | ||
2796 | static struct bfd_hash_entry * | |
2797 | elf32_mn10300_link_hash_newfunc (entry, table, string) | |
2798 | struct bfd_hash_entry *entry; | |
2799 | struct bfd_hash_table *table; | |
2800 | const char *string; | |
2801 | { | |
2802 | struct elf32_mn10300_link_hash_entry *ret = | |
2803 | (struct elf32_mn10300_link_hash_entry *) entry; | |
2804 | ||
2805 | /* Allocate the structure if it has not already been allocated by a | |
2806 | subclass. */ | |
2807 | if (ret == (struct elf32_mn10300_link_hash_entry *) NULL) | |
2808 | ret = ((struct elf32_mn10300_link_hash_entry *) | |
2809 | bfd_hash_allocate (table, | |
2810 | sizeof (struct elf32_mn10300_link_hash_entry))); | |
2811 | if (ret == (struct elf32_mn10300_link_hash_entry *) NULL) | |
2812 | return (struct bfd_hash_entry *) ret; | |
2813 | ||
2814 | /* Call the allocation method of the superclass. */ | |
2815 | ret = ((struct elf32_mn10300_link_hash_entry *) | |
2816 | _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, | |
2817 | table, string)); | |
2818 | if (ret != (struct elf32_mn10300_link_hash_entry *) NULL) | |
2819 | { | |
2820 | ret->direct_calls = 0; | |
2821 | ret->stack_size = 0; | |
2822 | ret->movm_stack_size = 0; | |
2823 | ret->flags = 0; | |
2824 | ret->movm_args = 0; | |
2825 | } | |
2826 | ||
2827 | return (struct bfd_hash_entry *) ret; | |
2828 | } | |
2829 | ||
2830 | /* Create an mn10300 ELF linker hash table. */ | |
2831 | ||
2832 | static struct bfd_link_hash_table * | |
2833 | elf32_mn10300_link_hash_table_create (abfd) | |
2834 | bfd *abfd; | |
2835 | { | |
2836 | struct elf32_mn10300_link_hash_table *ret; | |
2837 | ||
2838 | ret = ((struct elf32_mn10300_link_hash_table *) | |
2839 | bfd_alloc (abfd, sizeof (struct elf32_mn10300_link_hash_table))); | |
2840 | if (ret == (struct elf32_mn10300_link_hash_table *) NULL) | |
2841 | return NULL; | |
2842 | ||
2843 | if (! _bfd_elf_link_hash_table_init (&ret->root, abfd, | |
2844 | elf32_mn10300_link_hash_newfunc)) | |
2845 | { | |
2846 | bfd_release (abfd, ret); | |
2847 | return NULL; | |
2848 | } | |
2849 | ||
2850 | ret->flags = 0; | |
2851 | ret->static_hash_table | |
2852 | = ((struct elf32_mn10300_link_hash_table *) | |
2853 | bfd_alloc (abfd, sizeof (struct elf_link_hash_table))); | |
2854 | if (ret->static_hash_table == NULL) | |
2855 | { | |
2856 | bfd_release (abfd, ret); | |
2857 | return NULL; | |
2858 | } | |
2859 | ||
2860 | if (! _bfd_elf_link_hash_table_init (&ret->static_hash_table->root, abfd, | |
2861 | elf32_mn10300_link_hash_newfunc)) | |
2862 | { | |
2863 | bfd_release (abfd, ret->static_hash_table); | |
2864 | bfd_release (abfd, ret); | |
2865 | return NULL; | |
2866 | } | |
2867 | return &ret->root.root; | |
2868 | } | |
2869 | ||
2870 | static int | |
2871 | elf_mn10300_mach (flags) | |
2872 | flagword flags; | |
2873 | { | |
2874 | switch (flags & EF_MN10300_MACH) | |
2875 | { | |
2876 | case E_MN10300_MACH_MN10300: | |
2877 | default: | |
2878 | return bfd_mach_mn10300; | |
2879 | ||
31f8dc8f JL |
2880 | case E_MN10300_MACH_AM33: |
2881 | return bfd_mach_am33; | |
252b5132 RH |
2882 | } |
2883 | } | |
2884 | ||
2885 | /* The final processing done just before writing out a MN10300 ELF object | |
2886 | file. This gets the MN10300 architecture right based on the machine | |
2887 | number. */ | |
2888 | ||
252b5132 RH |
2889 | void |
2890 | _bfd_mn10300_elf_final_write_processing (abfd, linker) | |
2891 | bfd *abfd; | |
5f771d47 | 2892 | boolean linker ATTRIBUTE_UNUSED; |
252b5132 RH |
2893 | { |
2894 | unsigned long val; | |
252b5132 RH |
2895 | |
2896 | switch (bfd_get_mach (abfd)) | |
2897 | { | |
2898 | default: | |
2899 | case bfd_mach_mn10300: | |
2900 | val = E_MN10300_MACH_MN10300; | |
2901 | break; | |
2902 | ||
31f8dc8f JL |
2903 | case bfd_mach_am33: |
2904 | val = E_MN10300_MACH_AM33; | |
2905 | break; | |
252b5132 RH |
2906 | } |
2907 | ||
2908 | elf_elfheader (abfd)->e_flags &= ~ (EF_MN10300_MACH); | |
2909 | elf_elfheader (abfd)->e_flags |= val; | |
2910 | } | |
2911 | ||
2912 | boolean | |
2913 | _bfd_mn10300_elf_object_p (abfd) | |
2914 | bfd *abfd; | |
2915 | { | |
2916 | bfd_default_set_arch_mach (abfd, bfd_arch_mn10300, | |
2917 | elf_mn10300_mach (elf_elfheader (abfd)->e_flags)); | |
2918 | return true; | |
2919 | } | |
2920 | ||
2921 | /* Merge backend specific data from an object file to the output | |
2922 | object file when linking. */ | |
2923 | ||
2924 | boolean | |
2925 | _bfd_mn10300_elf_merge_private_bfd_data (ibfd, obfd) | |
2926 | bfd *ibfd; | |
2927 | bfd *obfd; | |
2928 | { | |
2929 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
2930 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
2931 | return true; | |
2932 | ||
2933 | if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) | |
2934 | && bfd_get_mach (obfd) < bfd_get_mach (ibfd)) | |
2935 | { | |
2936 | if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), | |
2937 | bfd_get_mach (ibfd))) | |
2938 | return false; | |
2939 | } | |
2940 | ||
2941 | return true; | |
2942 | } | |
2943 | ||
252b5132 RH |
2944 | #define TARGET_LITTLE_SYM bfd_elf32_mn10300_vec |
2945 | #define TARGET_LITTLE_NAME "elf32-mn10300" | |
2946 | #define ELF_ARCH bfd_arch_mn10300 | |
2947 | #define ELF_MACHINE_CODE EM_CYGNUS_MN10300 | |
2948 | #define ELF_MAXPAGESIZE 0x1000 | |
2949 | ||
2950 | #define elf_info_to_howto mn10300_info_to_howto | |
2951 | #define elf_info_to_howto_rel 0 | |
2952 | #define elf_backend_can_gc_sections 1 | |
2953 | #define elf_backend_check_relocs mn10300_elf_check_relocs | |
2954 | #define elf_backend_gc_mark_hook mn10300_elf_gc_mark_hook | |
2955 | #define elf_backend_relocate_section mn10300_elf_relocate_section | |
2956 | #define bfd_elf32_bfd_relax_section mn10300_elf_relax_section | |
2957 | #define bfd_elf32_bfd_get_relocated_section_contents \ | |
2958 | mn10300_elf_get_relocated_section_contents | |
2959 | #define bfd_elf32_bfd_link_hash_table_create \ | |
2960 | elf32_mn10300_link_hash_table_create | |
2961 | ||
2962 | #define elf_symbol_leading_char '_' | |
2963 | ||
2964 | /* So we can set bits in e_flags. */ | |
2965 | #define elf_backend_final_write_processing \ | |
2966 | _bfd_mn10300_elf_final_write_processing | |
2967 | #define elf_backend_object_p _bfd_mn10300_elf_object_p | |
2968 | ||
2969 | #define bfd_elf32_bfd_merge_private_bfd_data \ | |
2970 | _bfd_mn10300_elf_merge_private_bfd_data | |
2971 | ||
252b5132 | 2972 | #include "elf32-target.h" |