Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* Matsushita 10300 specific support for 32-bit ELF |
e948afaf | 2 | Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002 |
010ac81f | 3 | Free Software Foundation, Inc. |
252b5132 RH |
4 | |
5 | This file is part of BFD, the Binary File Descriptor library. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
20 | ||
21 | #include "bfd.h" | |
22 | #include "sysdep.h" | |
23 | #include "libbfd.h" | |
24 | #include "elf-bfd.h" | |
25 | #include "elf/mn10300.h" | |
26 | ||
917583ad NC |
27 | static bfd_reloc_status_type mn10300_elf_final_link_relocate |
28 | PARAMS ((reloc_howto_type *, bfd *, bfd *, asection *, bfd_byte *, | |
29 | bfd_vma, bfd_vma, bfd_vma, struct bfd_link_info *, | |
30 | asection *, int)); | |
31 | static boolean mn10300_elf_relocate_section | |
32 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, | |
33 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); | |
34 | static boolean mn10300_elf_relax_section | |
35 | PARAMS ((bfd *, asection *, struct bfd_link_info *, boolean *)); | |
36 | static bfd_byte * mn10300_elf_get_relocated_section_contents | |
37 | PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *, | |
38 | bfd_byte *, boolean, asymbol **)); | |
dc810e39 | 39 | static unsigned long elf_mn10300_mach PARAMS ((flagword)); |
917583ad NC |
40 | |
41 | void _bfd_mn10300_elf_final_write_processing PARAMS ((bfd *, boolean)); | |
42 | boolean _bfd_mn10300_elf_object_p PARAMS ((bfd *)); | |
43 | boolean _bfd_mn10300_elf_merge_private_bfd_data PARAMS ((bfd *,bfd *)); | |
44 | ||
010ac81f | 45 | struct elf32_mn10300_link_hash_entry { |
252b5132 RH |
46 | /* The basic elf link hash table entry. */ |
47 | struct elf_link_hash_entry root; | |
48 | ||
49 | /* For function symbols, the number of times this function is | |
50 | called directly (ie by name). */ | |
51 | unsigned int direct_calls; | |
52 | ||
53 | /* For function symbols, the size of this function's stack | |
54 | (if <= 255 bytes). We stuff this into "call" instructions | |
55 | to this target when it's valid and profitable to do so. | |
56 | ||
57 | This does not include stack allocated by movm! */ | |
58 | unsigned char stack_size; | |
59 | ||
60 | /* For function symbols, arguments (if any) for movm instruction | |
61 | in the prologue. We stuff this value into "call" instructions | |
62 | to the target when it's valid and profitable to do so. */ | |
63 | unsigned char movm_args; | |
64 | ||
65 | /* For funtion symbols, the amount of stack space that would be allocated | |
66 | by the movm instruction. This is redundant with movm_args, but we | |
67 | add it to the hash table to avoid computing it over and over. */ | |
68 | unsigned char movm_stack_size; | |
69 | ||
70 | /* When set, convert all "call" instructions to this target into "calls" | |
71 | instructions. */ | |
72 | #define MN10300_CONVERT_CALL_TO_CALLS 0x1 | |
73 | ||
74 | /* Used to mark functions which have had redundant parts of their | |
75 | prologue deleted. */ | |
76 | #define MN10300_DELETED_PROLOGUE_BYTES 0x2 | |
77 | unsigned char flags; | |
78 | }; | |
79 | ||
80 | /* We derive a hash table from the main elf linker hash table so | |
81 | we can store state variables and a secondary hash table without | |
82 | resorting to global variables. */ | |
010ac81f | 83 | struct elf32_mn10300_link_hash_table { |
252b5132 RH |
84 | /* The main hash table. */ |
85 | struct elf_link_hash_table root; | |
86 | ||
87 | /* A hash table for static functions. We could derive a new hash table | |
88 | instead of using the full elf32_mn10300_link_hash_table if we wanted | |
89 | to save some memory. */ | |
90 | struct elf32_mn10300_link_hash_table *static_hash_table; | |
91 | ||
92 | /* Random linker state flags. */ | |
93 | #define MN10300_HASH_ENTRIES_INITIALIZED 0x1 | |
94 | char flags; | |
95 | }; | |
96 | ||
97 | /* For MN10300 linker hash table. */ | |
98 | ||
99 | /* Get the MN10300 ELF linker hash table from a link_info structure. */ | |
100 | ||
101 | #define elf32_mn10300_hash_table(p) \ | |
102 | ((struct elf32_mn10300_link_hash_table *) ((p)->hash)) | |
103 | ||
104 | #define elf32_mn10300_link_hash_traverse(table, func, info) \ | |
105 | (elf_link_hash_traverse \ | |
106 | (&(table)->root, \ | |
107 | (boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \ | |
108 | (info))) | |
109 | ||
110 | static struct bfd_hash_entry *elf32_mn10300_link_hash_newfunc | |
111 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); | |
112 | static struct bfd_link_hash_table *elf32_mn10300_link_hash_table_create | |
113 | PARAMS ((bfd *)); | |
e2d34d7d DJ |
114 | static void elf32_mn10300_link_hash_table_free |
115 | PARAMS ((struct bfd_link_hash_table *)); | |
252b5132 RH |
116 | |
117 | static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup | |
118 | PARAMS ((bfd *abfd, bfd_reloc_code_real_type code)); | |
119 | static void mn10300_info_to_howto | |
120 | PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *)); | |
121 | static boolean mn10300_elf_check_relocs | |
122 | PARAMS ((bfd *, struct bfd_link_info *, asection *, | |
123 | const Elf_Internal_Rela *)); | |
124 | static asection *mn10300_elf_gc_mark_hook | |
1e2f5b6e | 125 | PARAMS ((asection *, struct bfd_link_info *info, Elf_Internal_Rela *, |
252b5132 RH |
126 | struct elf_link_hash_entry *, Elf_Internal_Sym *)); |
127 | static boolean mn10300_elf_relax_delete_bytes | |
128 | PARAMS ((bfd *, asection *, bfd_vma, int)); | |
129 | static boolean mn10300_elf_symbol_address_p | |
6cdc0ccc | 130 | PARAMS ((bfd *, asection *, Elf_Internal_Sym *, bfd_vma)); |
252b5132 RH |
131 | static boolean elf32_mn10300_finish_hash_table_entry |
132 | PARAMS ((struct bfd_hash_entry *, PTR)); | |
133 | static void compute_function_info | |
134 | PARAMS ((bfd *, struct elf32_mn10300_link_hash_entry *, | |
135 | bfd_vma, unsigned char *)); | |
136 | ||
010ac81f | 137 | static reloc_howto_type elf_mn10300_howto_table[] = { |
252b5132 RH |
138 | /* Dummy relocation. Does nothing. */ |
139 | HOWTO (R_MN10300_NONE, | |
140 | 0, | |
141 | 2, | |
142 | 16, | |
143 | false, | |
144 | 0, | |
145 | complain_overflow_bitfield, | |
146 | bfd_elf_generic_reloc, | |
147 | "R_MN10300_NONE", | |
148 | false, | |
149 | 0, | |
150 | 0, | |
151 | false), | |
152 | /* Standard 32 bit reloc. */ | |
153 | HOWTO (R_MN10300_32, | |
154 | 0, | |
155 | 2, | |
156 | 32, | |
157 | false, | |
158 | 0, | |
159 | complain_overflow_bitfield, | |
160 | bfd_elf_generic_reloc, | |
161 | "R_MN10300_32", | |
162 | false, | |
163 | 0xffffffff, | |
164 | 0xffffffff, | |
165 | false), | |
166 | /* Standard 16 bit reloc. */ | |
167 | HOWTO (R_MN10300_16, | |
168 | 0, | |
169 | 1, | |
170 | 16, | |
171 | false, | |
172 | 0, | |
173 | complain_overflow_bitfield, | |
174 | bfd_elf_generic_reloc, | |
175 | "R_MN10300_16", | |
176 | false, | |
177 | 0xffff, | |
178 | 0xffff, | |
179 | false), | |
180 | /* Standard 8 bit reloc. */ | |
181 | HOWTO (R_MN10300_8, | |
182 | 0, | |
183 | 0, | |
184 | 8, | |
185 | false, | |
186 | 0, | |
187 | complain_overflow_bitfield, | |
188 | bfd_elf_generic_reloc, | |
189 | "R_MN10300_8", | |
190 | false, | |
191 | 0xff, | |
192 | 0xff, | |
193 | false), | |
194 | /* Standard 32bit pc-relative reloc. */ | |
195 | HOWTO (R_MN10300_PCREL32, | |
196 | 0, | |
197 | 2, | |
198 | 32, | |
199 | true, | |
200 | 0, | |
201 | complain_overflow_bitfield, | |
202 | bfd_elf_generic_reloc, | |
203 | "R_MN10300_PCREL32", | |
204 | false, | |
205 | 0xffffffff, | |
206 | 0xffffffff, | |
207 | true), | |
208 | /* Standard 16bit pc-relative reloc. */ | |
209 | HOWTO (R_MN10300_PCREL16, | |
210 | 0, | |
211 | 1, | |
212 | 16, | |
213 | true, | |
214 | 0, | |
215 | complain_overflow_bitfield, | |
216 | bfd_elf_generic_reloc, | |
217 | "R_MN10300_PCREL16", | |
218 | false, | |
219 | 0xffff, | |
220 | 0xffff, | |
221 | true), | |
222 | /* Standard 8 pc-relative reloc. */ | |
223 | HOWTO (R_MN10300_PCREL8, | |
224 | 0, | |
225 | 0, | |
226 | 8, | |
227 | true, | |
228 | 0, | |
229 | complain_overflow_bitfield, | |
230 | bfd_elf_generic_reloc, | |
231 | "R_MN10300_PCREL8", | |
232 | false, | |
233 | 0xff, | |
234 | 0xff, | |
235 | true), | |
236 | ||
237 | /* GNU extension to record C++ vtable hierarchy */ | |
238 | HOWTO (R_MN10300_GNU_VTINHERIT, /* type */ | |
239 | 0, /* rightshift */ | |
240 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
241 | 0, /* bitsize */ | |
242 | false, /* pc_relative */ | |
243 | 0, /* bitpos */ | |
244 | complain_overflow_dont, /* complain_on_overflow */ | |
245 | NULL, /* special_function */ | |
246 | "R_MN10300_GNU_VTINHERIT", /* name */ | |
247 | false, /* partial_inplace */ | |
248 | 0, /* src_mask */ | |
249 | 0, /* dst_mask */ | |
250 | false), /* pcrel_offset */ | |
251 | ||
252 | /* GNU extension to record C++ vtable member usage */ | |
253 | HOWTO (R_MN10300_GNU_VTENTRY, /* type */ | |
254 | 0, /* rightshift */ | |
255 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
256 | 0, /* bitsize */ | |
257 | false, /* pc_relative */ | |
258 | 0, /* bitpos */ | |
259 | complain_overflow_dont, /* complain_on_overflow */ | |
260 | NULL, /* special_function */ | |
261 | "R_MN10300_GNU_VTENTRY", /* name */ | |
262 | false, /* partial_inplace */ | |
263 | 0, /* src_mask */ | |
264 | 0, /* dst_mask */ | |
265 | false), /* pcrel_offset */ | |
266 | ||
267 | /* Standard 24 bit reloc. */ | |
268 | HOWTO (R_MN10300_24, | |
269 | 0, | |
270 | 2, | |
271 | 24, | |
272 | false, | |
273 | 0, | |
274 | complain_overflow_bitfield, | |
275 | bfd_elf_generic_reloc, | |
276 | "R_MN10300_24", | |
277 | false, | |
278 | 0xffffff, | |
279 | 0xffffff, | |
280 | false), | |
252b5132 RH |
281 | }; |
282 | ||
010ac81f | 283 | struct mn10300_reloc_map { |
252b5132 RH |
284 | bfd_reloc_code_real_type bfd_reloc_val; |
285 | unsigned char elf_reloc_val; | |
286 | }; | |
287 | ||
010ac81f | 288 | static const struct mn10300_reloc_map mn10300_reloc_map[] = { |
252b5132 RH |
289 | { BFD_RELOC_NONE, R_MN10300_NONE, }, |
290 | { BFD_RELOC_32, R_MN10300_32, }, | |
291 | { BFD_RELOC_16, R_MN10300_16, }, | |
292 | { BFD_RELOC_8, R_MN10300_8, }, | |
293 | { BFD_RELOC_32_PCREL, R_MN10300_PCREL32, }, | |
294 | { BFD_RELOC_16_PCREL, R_MN10300_PCREL16, }, | |
295 | { BFD_RELOC_8_PCREL, R_MN10300_PCREL8, }, | |
296 | { BFD_RELOC_24, R_MN10300_24, }, | |
297 | { BFD_RELOC_VTABLE_INHERIT, R_MN10300_GNU_VTINHERIT }, | |
298 | { BFD_RELOC_VTABLE_ENTRY, R_MN10300_GNU_VTENTRY }, | |
299 | }; | |
300 | ||
301 | static reloc_howto_type * | |
302 | bfd_elf32_bfd_reloc_type_lookup (abfd, code) | |
5f771d47 | 303 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
304 | bfd_reloc_code_real_type code; |
305 | { | |
306 | unsigned int i; | |
307 | ||
308 | for (i = 0; | |
309 | i < sizeof (mn10300_reloc_map) / sizeof (struct mn10300_reloc_map); | |
310 | i++) | |
311 | { | |
312 | if (mn10300_reloc_map[i].bfd_reloc_val == code) | |
313 | return &elf_mn10300_howto_table[mn10300_reloc_map[i].elf_reloc_val]; | |
314 | } | |
315 | ||
316 | return NULL; | |
317 | } | |
318 | ||
319 | /* Set the howto pointer for an MN10300 ELF reloc. */ | |
320 | ||
321 | static void | |
322 | mn10300_info_to_howto (abfd, cache_ptr, dst) | |
5f771d47 | 323 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
324 | arelent *cache_ptr; |
325 | Elf32_Internal_Rela *dst; | |
326 | { | |
327 | unsigned int r_type; | |
328 | ||
329 | r_type = ELF32_R_TYPE (dst->r_info); | |
330 | BFD_ASSERT (r_type < (unsigned int) R_MN10300_MAX); | |
331 | cache_ptr->howto = &elf_mn10300_howto_table[r_type]; | |
332 | } | |
333 | ||
334 | /* Look through the relocs for a section during the first phase. | |
335 | Since we don't do .gots or .plts, we just need to consider the | |
336 | virtual table relocs for gc. */ | |
337 | ||
338 | static boolean | |
339 | mn10300_elf_check_relocs (abfd, info, sec, relocs) | |
340 | bfd *abfd; | |
341 | struct bfd_link_info *info; | |
342 | asection *sec; | |
343 | const Elf_Internal_Rela *relocs; | |
344 | { | |
345 | Elf_Internal_Shdr *symtab_hdr; | |
346 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; | |
347 | const Elf_Internal_Rela *rel; | |
348 | const Elf_Internal_Rela *rel_end; | |
349 | ||
350 | if (info->relocateable) | |
351 | return true; | |
352 | ||
353 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
354 | sym_hashes = elf_sym_hashes (abfd); | |
a7c10850 | 355 | sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym); |
252b5132 RH |
356 | if (!elf_bad_symtab (abfd)) |
357 | sym_hashes_end -= symtab_hdr->sh_info; | |
358 | ||
359 | rel_end = relocs + sec->reloc_count; | |
360 | for (rel = relocs; rel < rel_end; rel++) | |
361 | { | |
362 | struct elf_link_hash_entry *h; | |
363 | unsigned long r_symndx; | |
364 | ||
365 | r_symndx = ELF32_R_SYM (rel->r_info); | |
366 | if (r_symndx < symtab_hdr->sh_info) | |
367 | h = NULL; | |
368 | else | |
369 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
370 | ||
371 | switch (ELF32_R_TYPE (rel->r_info)) | |
372 | { | |
373 | /* This relocation describes the C++ object vtable hierarchy. | |
374 | Reconstruct it for later use during GC. */ | |
375 | case R_MN10300_GNU_VTINHERIT: | |
376 | if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
377 | return false; | |
378 | break; | |
379 | ||
380 | /* This relocation describes which C++ vtable entries are actually | |
381 | used. Record for later use during GC. */ | |
382 | case R_MN10300_GNU_VTENTRY: | |
383 | if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
384 | return false; | |
385 | break; | |
386 | } | |
387 | } | |
388 | ||
389 | return true; | |
390 | } | |
391 | ||
392 | /* Return the section that should be marked against GC for a given | |
393 | relocation. */ | |
394 | ||
395 | static asection * | |
1e2f5b6e AM |
396 | mn10300_elf_gc_mark_hook (sec, info, rel, h, sym) |
397 | asection *sec; | |
5f771d47 | 398 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
252b5132 RH |
399 | Elf_Internal_Rela *rel; |
400 | struct elf_link_hash_entry *h; | |
401 | Elf_Internal_Sym *sym; | |
402 | { | |
403 | if (h != NULL) | |
404 | { | |
405 | switch (ELF32_R_TYPE (rel->r_info)) | |
406 | { | |
407 | case R_MN10300_GNU_VTINHERIT: | |
408 | case R_MN10300_GNU_VTENTRY: | |
409 | break; | |
410 | ||
411 | default: | |
412 | switch (h->root.type) | |
413 | { | |
414 | case bfd_link_hash_defined: | |
415 | case bfd_link_hash_defweak: | |
416 | return h->root.u.def.section; | |
417 | ||
418 | case bfd_link_hash_common: | |
419 | return h->root.u.c.p->section; | |
e049a0de ILT |
420 | |
421 | default: | |
422 | break; | |
252b5132 RH |
423 | } |
424 | } | |
425 | } | |
426 | else | |
1e2f5b6e | 427 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
252b5132 RH |
428 | |
429 | return NULL; | |
430 | } | |
431 | ||
432 | /* Perform a relocation as part of a final link. */ | |
433 | static bfd_reloc_status_type | |
434 | mn10300_elf_final_link_relocate (howto, input_bfd, output_bfd, | |
435 | input_section, contents, offset, value, | |
436 | addend, info, sym_sec, is_local) | |
437 | reloc_howto_type *howto; | |
438 | bfd *input_bfd; | |
5f771d47 | 439 | bfd *output_bfd ATTRIBUTE_UNUSED; |
252b5132 RH |
440 | asection *input_section; |
441 | bfd_byte *contents; | |
442 | bfd_vma offset; | |
443 | bfd_vma value; | |
444 | bfd_vma addend; | |
5f771d47 ILT |
445 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
446 | asection *sym_sec ATTRIBUTE_UNUSED; | |
447 | int is_local ATTRIBUTE_UNUSED; | |
252b5132 RH |
448 | { |
449 | unsigned long r_type = howto->type; | |
450 | bfd_byte *hit_data = contents + offset; | |
451 | ||
452 | switch (r_type) | |
453 | { | |
454 | case R_MN10300_NONE: | |
455 | return bfd_reloc_ok; | |
456 | ||
457 | case R_MN10300_32: | |
458 | value += addend; | |
459 | bfd_put_32 (input_bfd, value, hit_data); | |
460 | return bfd_reloc_ok; | |
461 | ||
462 | case R_MN10300_24: | |
463 | value += addend; | |
464 | ||
010ac81f | 465 | if ((long) value > 0x7fffff || (long) value < -0x800000) |
252b5132 RH |
466 | return bfd_reloc_overflow; |
467 | ||
468 | bfd_put_8 (input_bfd, value & 0xff, hit_data); | |
469 | bfd_put_8 (input_bfd, (value >> 8) & 0xff, hit_data + 1); | |
470 | bfd_put_8 (input_bfd, (value >> 16) & 0xff, hit_data + 2); | |
471 | return bfd_reloc_ok; | |
472 | ||
473 | case R_MN10300_16: | |
474 | value += addend; | |
475 | ||
010ac81f | 476 | if ((long) value > 0x7fff || (long) value < -0x8000) |
252b5132 RH |
477 | return bfd_reloc_overflow; |
478 | ||
479 | bfd_put_16 (input_bfd, value, hit_data); | |
480 | return bfd_reloc_ok; | |
481 | ||
482 | case R_MN10300_8: | |
483 | value += addend; | |
484 | ||
010ac81f | 485 | if ((long) value > 0x7f || (long) value < -0x80) |
252b5132 RH |
486 | return bfd_reloc_overflow; |
487 | ||
488 | bfd_put_8 (input_bfd, value, hit_data); | |
489 | return bfd_reloc_ok; | |
490 | ||
491 | case R_MN10300_PCREL8: | |
492 | value -= (input_section->output_section->vma | |
493 | + input_section->output_offset); | |
494 | value -= offset; | |
495 | value += addend; | |
496 | ||
010ac81f | 497 | if ((long) value > 0xff || (long) value < -0x100) |
252b5132 RH |
498 | return bfd_reloc_overflow; |
499 | ||
500 | bfd_put_8 (input_bfd, value, hit_data); | |
501 | return bfd_reloc_ok; | |
502 | ||
503 | case R_MN10300_PCREL16: | |
504 | value -= (input_section->output_section->vma | |
505 | + input_section->output_offset); | |
506 | value -= offset; | |
507 | value += addend; | |
508 | ||
010ac81f | 509 | if ((long) value > 0xffff || (long) value < -0x10000) |
252b5132 RH |
510 | return bfd_reloc_overflow; |
511 | ||
512 | bfd_put_16 (input_bfd, value, hit_data); | |
513 | return bfd_reloc_ok; | |
514 | ||
515 | case R_MN10300_PCREL32: | |
516 | value -= (input_section->output_section->vma | |
517 | + input_section->output_offset); | |
518 | value -= offset; | |
519 | value += addend; | |
520 | ||
521 | bfd_put_32 (input_bfd, value, hit_data); | |
522 | return bfd_reloc_ok; | |
523 | ||
524 | case R_MN10300_GNU_VTINHERIT: | |
525 | case R_MN10300_GNU_VTENTRY: | |
526 | return bfd_reloc_ok; | |
527 | ||
528 | default: | |
529 | return bfd_reloc_notsupported; | |
530 | } | |
531 | } | |
252b5132 RH |
532 | \f |
533 | /* Relocate an MN10300 ELF section. */ | |
534 | static boolean | |
535 | mn10300_elf_relocate_section (output_bfd, info, input_bfd, input_section, | |
536 | contents, relocs, local_syms, local_sections) | |
537 | bfd *output_bfd; | |
538 | struct bfd_link_info *info; | |
539 | bfd *input_bfd; | |
540 | asection *input_section; | |
541 | bfd_byte *contents; | |
542 | Elf_Internal_Rela *relocs; | |
543 | Elf_Internal_Sym *local_syms; | |
544 | asection **local_sections; | |
545 | { | |
546 | Elf_Internal_Shdr *symtab_hdr; | |
547 | struct elf32_mn10300_link_hash_entry **sym_hashes; | |
548 | Elf_Internal_Rela *rel, *relend; | |
549 | ||
b491616a AM |
550 | if (info->relocateable) |
551 | return true; | |
552 | ||
252b5132 RH |
553 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
554 | sym_hashes = (struct elf32_mn10300_link_hash_entry **) | |
555 | (elf_sym_hashes (input_bfd)); | |
556 | ||
557 | rel = relocs; | |
558 | relend = relocs + input_section->reloc_count; | |
559 | for (; rel < relend; rel++) | |
560 | { | |
561 | int r_type; | |
562 | reloc_howto_type *howto; | |
563 | unsigned long r_symndx; | |
564 | Elf_Internal_Sym *sym; | |
565 | asection *sec; | |
566 | struct elf32_mn10300_link_hash_entry *h; | |
567 | bfd_vma relocation; | |
568 | bfd_reloc_status_type r; | |
569 | ||
570 | r_symndx = ELF32_R_SYM (rel->r_info); | |
571 | r_type = ELF32_R_TYPE (rel->r_info); | |
572 | howto = elf_mn10300_howto_table + r_type; | |
573 | ||
574 | /* Just skip the vtable gc relocs. */ | |
575 | if (r_type == R_MN10300_GNU_VTINHERIT | |
576 | || r_type == R_MN10300_GNU_VTENTRY) | |
577 | continue; | |
578 | ||
252b5132 RH |
579 | h = NULL; |
580 | sym = NULL; | |
581 | sec = NULL; | |
582 | if (r_symndx < symtab_hdr->sh_info) | |
583 | { | |
584 | sym = local_syms + r_symndx; | |
585 | sec = local_sections[r_symndx]; | |
f8df10f4 | 586 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel); |
252b5132 RH |
587 | } |
588 | else | |
589 | { | |
590 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
17ea6349 AO |
591 | while (h->root.root.type == bfd_link_hash_indirect |
592 | || h->root.root.type == bfd_link_hash_warning) | |
252b5132 RH |
593 | h = (struct elf32_mn10300_link_hash_entry *) h->root.root.u.i.link; |
594 | if (h->root.root.type == bfd_link_hash_defined | |
595 | || h->root.root.type == bfd_link_hash_defweak) | |
596 | { | |
597 | sec = h->root.root.u.def.section; | |
598 | relocation = (h->root.root.u.def.value | |
599 | + sec->output_section->vma | |
600 | + sec->output_offset); | |
601 | } | |
602 | else if (h->root.root.type == bfd_link_hash_undefweak) | |
603 | relocation = 0; | |
604 | else | |
605 | { | |
606 | if (! ((*info->callbacks->undefined_symbol) | |
607 | (info, h->root.root.root.string, input_bfd, | |
5cc7c785 | 608 | input_section, rel->r_offset, true))) |
252b5132 RH |
609 | return false; |
610 | relocation = 0; | |
611 | } | |
612 | } | |
613 | ||
614 | r = mn10300_elf_final_link_relocate (howto, input_bfd, output_bfd, | |
615 | input_section, | |
616 | contents, rel->r_offset, | |
617 | relocation, rel->r_addend, | |
618 | info, sec, h == NULL); | |
619 | ||
620 | if (r != bfd_reloc_ok) | |
621 | { | |
622 | const char *name; | |
010ac81f | 623 | const char *msg = (const char *) 0; |
252b5132 RH |
624 | |
625 | if (h != NULL) | |
626 | name = h->root.root.root.string; | |
627 | else | |
628 | { | |
629 | name = (bfd_elf_string_from_elf_section | |
630 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); | |
631 | if (name == NULL || *name == '\0') | |
632 | name = bfd_section_name (input_bfd, sec); | |
633 | } | |
634 | ||
635 | switch (r) | |
636 | { | |
637 | case bfd_reloc_overflow: | |
638 | if (! ((*info->callbacks->reloc_overflow) | |
639 | (info, name, howto->name, (bfd_vma) 0, | |
640 | input_bfd, input_section, rel->r_offset))) | |
641 | return false; | |
642 | break; | |
643 | ||
644 | case bfd_reloc_undefined: | |
645 | if (! ((*info->callbacks->undefined_symbol) | |
646 | (info, name, input_bfd, input_section, | |
5cc7c785 | 647 | rel->r_offset, true))) |
252b5132 RH |
648 | return false; |
649 | break; | |
650 | ||
651 | case bfd_reloc_outofrange: | |
652 | msg = _("internal error: out of range error"); | |
653 | goto common_error; | |
654 | ||
655 | case bfd_reloc_notsupported: | |
656 | msg = _("internal error: unsupported relocation error"); | |
657 | goto common_error; | |
658 | ||
659 | case bfd_reloc_dangerous: | |
660 | msg = _("internal error: dangerous error"); | |
661 | goto common_error; | |
662 | ||
663 | default: | |
664 | msg = _("internal error: unknown error"); | |
665 | /* fall through */ | |
666 | ||
667 | common_error: | |
668 | if (!((*info->callbacks->warning) | |
669 | (info, msg, name, input_bfd, input_section, | |
670 | rel->r_offset))) | |
671 | return false; | |
672 | break; | |
673 | } | |
674 | } | |
675 | } | |
676 | ||
677 | return true; | |
678 | } | |
679 | ||
680 | /* Finish initializing one hash table entry. */ | |
681 | static boolean | |
682 | elf32_mn10300_finish_hash_table_entry (gen_entry, in_args) | |
683 | struct bfd_hash_entry *gen_entry; | |
5f771d47 | 684 | PTR in_args ATTRIBUTE_UNUSED; |
252b5132 RH |
685 | { |
686 | struct elf32_mn10300_link_hash_entry *entry; | |
687 | unsigned int byte_count = 0; | |
688 | ||
010ac81f | 689 | entry = (struct elf32_mn10300_link_hash_entry *) gen_entry; |
252b5132 | 690 | |
e92d460e AM |
691 | if (entry->root.root.type == bfd_link_hash_warning) |
692 | entry = (struct elf32_mn10300_link_hash_entry *) entry->root.root.u.i.link; | |
693 | ||
252b5132 RH |
694 | /* If we already know we want to convert "call" to "calls" for calls |
695 | to this symbol, then return now. */ | |
696 | if (entry->flags == MN10300_CONVERT_CALL_TO_CALLS) | |
697 | return true; | |
698 | ||
699 | /* If there are no named calls to this symbol, or there's nothing we | |
700 | can move from the function itself into the "call" instruction, then | |
701 | note that all "call" instructions should be converted into "calls" | |
702 | instructions and return. */ | |
703 | if (entry->direct_calls == 0 | |
704 | || (entry->stack_size == 0 && entry->movm_args == 0)) | |
705 | { | |
706 | /* Make a note that we should convert "call" instructions to "calls" | |
707 | instructions for calls to this symbol. */ | |
708 | entry->flags |= MN10300_CONVERT_CALL_TO_CALLS; | |
709 | return true; | |
710 | } | |
711 | ||
712 | /* We may be able to move some instructions from the function itself into | |
713 | the "call" instruction. Count how many bytes we might be able to | |
714 | eliminate in the function itself. */ | |
715 | ||
716 | /* A movm instruction is two bytes. */ | |
717 | if (entry->movm_args) | |
718 | byte_count += 2; | |
719 | ||
720 | /* Count the insn to allocate stack space too. */ | |
721 | if (entry->stack_size > 0 && entry->stack_size <= 128) | |
722 | byte_count += 3; | |
723 | else if (entry->stack_size > 0 && entry->stack_size < 256) | |
724 | byte_count += 4; | |
725 | ||
726 | /* If using "call" will result in larger code, then turn all | |
727 | the associated "call" instructions into "calls" instrutions. */ | |
728 | if (byte_count < entry->direct_calls) | |
729 | entry->flags |= MN10300_CONVERT_CALL_TO_CALLS; | |
730 | ||
731 | /* This routine never fails. */ | |
732 | return true; | |
733 | } | |
734 | ||
735 | /* This function handles relaxing for the mn10300. | |
736 | ||
737 | There's quite a few relaxing opportunites available on the mn10300: | |
738 | ||
739 | * calls:32 -> calls:16 2 bytes | |
740 | * call:32 -> call:16 2 bytes | |
741 | ||
742 | * call:32 -> calls:32 1 byte | |
743 | * call:16 -> calls:16 1 byte | |
744 | * These are done anytime using "calls" would result | |
745 | in smaller code, or when necessary to preserve the | |
746 | meaning of the program. | |
747 | ||
748 | * call:32 varies | |
749 | * call:16 | |
750 | * In some circumstances we can move instructions | |
751 | from a function prologue into a "call" instruction. | |
752 | This is only done if the resulting code is no larger | |
753 | than the original code. | |
754 | ||
252b5132 RH |
755 | * jmp:32 -> jmp:16 2 bytes |
756 | * jmp:16 -> bra:8 1 byte | |
757 | ||
758 | * If the previous instruction is a conditional branch | |
759 | around the jump/bra, we may be able to reverse its condition | |
760 | and change its target to the jump's target. The jump/bra | |
761 | can then be deleted. 2 bytes | |
762 | ||
763 | * mov abs32 -> mov abs16 1 or 2 bytes | |
764 | ||
765 | * Most instructions which accept imm32 can relax to imm16 1 or 2 bytes | |
766 | - Most instructions which accept imm16 can relax to imm8 1 or 2 bytes | |
767 | ||
768 | * Most instructions which accept d32 can relax to d16 1 or 2 bytes | |
769 | - Most instructions which accept d16 can relax to d8 1 or 2 bytes | |
770 | ||
771 | We don't handle imm16->imm8 or d16->d8 as they're very rare | |
772 | and somewhat more difficult to support. */ | |
773 | ||
774 | static boolean | |
775 | mn10300_elf_relax_section (abfd, sec, link_info, again) | |
776 | bfd *abfd; | |
777 | asection *sec; | |
778 | struct bfd_link_info *link_info; | |
779 | boolean *again; | |
780 | { | |
781 | Elf_Internal_Shdr *symtab_hdr; | |
782 | Elf_Internal_Rela *internal_relocs = NULL; | |
252b5132 RH |
783 | Elf_Internal_Rela *irel, *irelend; |
784 | bfd_byte *contents = NULL; | |
6cdc0ccc | 785 | Elf_Internal_Sym *isymbuf = NULL; |
252b5132 | 786 | struct elf32_mn10300_link_hash_table *hash_table; |
6cdc0ccc | 787 | asection *section = sec; |
252b5132 RH |
788 | |
789 | /* Assume nothing changes. */ | |
790 | *again = false; | |
791 | ||
792 | /* We need a pointer to the mn10300 specific hash table. */ | |
793 | hash_table = elf32_mn10300_hash_table (link_info); | |
794 | ||
795 | /* Initialize fields in each hash table entry the first time through. */ | |
796 | if ((hash_table->flags & MN10300_HASH_ENTRIES_INITIALIZED) == 0) | |
797 | { | |
798 | bfd *input_bfd; | |
799 | ||
800 | /* Iterate over all the input bfds. */ | |
801 | for (input_bfd = link_info->input_bfds; | |
802 | input_bfd != NULL; | |
803 | input_bfd = input_bfd->link_next) | |
804 | { | |
252b5132 RH |
805 | /* We're going to need all the symbols for each bfd. */ |
806 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
6cdc0ccc | 807 | if (symtab_hdr->sh_info != 0) |
9ad5cbcf | 808 | { |
6cdc0ccc AM |
809 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
810 | if (isymbuf == NULL) | |
811 | isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, | |
812 | symtab_hdr->sh_info, 0, | |
813 | NULL, NULL, NULL); | |
814 | if (isymbuf == NULL) | |
010ac81f KH |
815 | goto error_return; |
816 | } | |
252b5132 RH |
817 | |
818 | /* Iterate over each section in this bfd. */ | |
819 | for (section = input_bfd->sections; | |
820 | section != NULL; | |
821 | section = section->next) | |
822 | { | |
823 | struct elf32_mn10300_link_hash_entry *hash; | |
824 | Elf_Internal_Sym *sym; | |
86033394 | 825 | asection *sym_sec = NULL; |
252b5132 RH |
826 | const char *sym_name; |
827 | char *new_name; | |
252b5132 | 828 | |
e948afaf AO |
829 | /* If there's nothing to do in this section, skip it. */ |
830 | if (! (((section->flags & SEC_RELOC) != 0 | |
831 | && section->reloc_count != 0) | |
832 | || (section->flags & SEC_CODE) != 0)) | |
833 | continue; | |
834 | ||
252b5132 RH |
835 | /* Get cached copy of section contents if it exists. */ |
836 | if (elf_section_data (section)->this_hdr.contents != NULL) | |
837 | contents = elf_section_data (section)->this_hdr.contents; | |
838 | else if (section->_raw_size != 0) | |
839 | { | |
840 | /* Go get them off disk. */ | |
010ac81f | 841 | contents = (bfd_byte *) bfd_malloc (section->_raw_size); |
252b5132 RH |
842 | if (contents == NULL) |
843 | goto error_return; | |
252b5132 RH |
844 | |
845 | if (!bfd_get_section_contents (input_bfd, section, | |
846 | contents, (file_ptr) 0, | |
847 | section->_raw_size)) | |
848 | goto error_return; | |
849 | } | |
850 | else | |
6cdc0ccc | 851 | contents = NULL; |
252b5132 RH |
852 | |
853 | /* If there aren't any relocs, then there's nothing to do. */ | |
854 | if ((section->flags & SEC_RELOC) != 0 | |
855 | && section->reloc_count != 0) | |
856 | { | |
857 | ||
858 | /* Get a copy of the native relocations. */ | |
859 | internal_relocs = (_bfd_elf32_link_read_relocs | |
860 | (input_bfd, section, (PTR) NULL, | |
861 | (Elf_Internal_Rela *) NULL, | |
862 | link_info->keep_memory)); | |
863 | if (internal_relocs == NULL) | |
864 | goto error_return; | |
252b5132 RH |
865 | |
866 | /* Now examine each relocation. */ | |
867 | irel = internal_relocs; | |
868 | irelend = irel + section->reloc_count; | |
869 | for (; irel < irelend; irel++) | |
870 | { | |
871 | long r_type; | |
872 | unsigned long r_index; | |
873 | unsigned char code; | |
874 | ||
875 | r_type = ELF32_R_TYPE (irel->r_info); | |
876 | r_index = ELF32_R_SYM (irel->r_info); | |
877 | ||
010ac81f | 878 | if (r_type < 0 || r_type >= (int) R_MN10300_MAX) |
252b5132 RH |
879 | goto error_return; |
880 | ||
881 | /* We need the name and hash table entry of the target | |
882 | symbol! */ | |
883 | hash = NULL; | |
884 | sym = NULL; | |
885 | sym_sec = NULL; | |
886 | ||
887 | if (r_index < symtab_hdr->sh_info) | |
888 | { | |
889 | /* A local symbol. */ | |
6cdc0ccc | 890 | Elf_Internal_Sym *isym; |
dc810e39 AM |
891 | struct elf_link_hash_table *elftab; |
892 | bfd_size_type amt; | |
252b5132 | 893 | |
6cdc0ccc AM |
894 | isym = isymbuf + r_index; |
895 | if (isym->st_shndx == SHN_UNDEF) | |
252b5132 | 896 | sym_sec = bfd_und_section_ptr; |
6cdc0ccc | 897 | else if (isym->st_shndx == SHN_ABS) |
252b5132 | 898 | sym_sec = bfd_abs_section_ptr; |
6cdc0ccc | 899 | else if (isym->st_shndx == SHN_COMMON) |
252b5132 | 900 | sym_sec = bfd_com_section_ptr; |
9ad5cbcf AM |
901 | else |
902 | sym_sec | |
903 | = bfd_section_from_elf_index (input_bfd, | |
6cdc0ccc | 904 | isym->st_shndx); |
a7c10850 | 905 | |
9ad5cbcf AM |
906 | sym_name |
907 | = bfd_elf_string_from_elf_section (input_bfd, | |
908 | (symtab_hdr | |
909 | ->sh_link), | |
6cdc0ccc | 910 | isym->st_name); |
252b5132 RH |
911 | |
912 | /* If it isn't a function, then we don't care | |
913 | about it. */ | |
6cdc0ccc | 914 | if (ELF_ST_TYPE (isym->st_info) != STT_FUNC) |
252b5132 RH |
915 | continue; |
916 | ||
917 | /* Tack on an ID so we can uniquely identify this | |
918 | local symbol in the global hash table. */ | |
dc810e39 AM |
919 | amt = strlen (sym_name) + 10; |
920 | new_name = bfd_malloc (amt); | |
252b5132 RH |
921 | if (new_name == 0) |
922 | goto error_return; | |
923 | ||
010ac81f KH |
924 | sprintf (new_name, "%s_%08x", |
925 | sym_name, (int) sym_sec); | |
252b5132 RH |
926 | sym_name = new_name; |
927 | ||
dc810e39 AM |
928 | elftab = &hash_table->static_hash_table->root; |
929 | hash = ((struct elf32_mn10300_link_hash_entry *) | |
930 | elf_link_hash_lookup (elftab, sym_name, | |
931 | true, true, false)); | |
252b5132 RH |
932 | free (new_name); |
933 | } | |
934 | else | |
935 | { | |
936 | r_index -= symtab_hdr->sh_info; | |
937 | hash = (struct elf32_mn10300_link_hash_entry *) | |
938 | elf_sym_hashes (input_bfd)[r_index]; | |
939 | } | |
940 | ||
941 | /* If this is not a "call" instruction, then we | |
942 | should convert "call" instructions to "calls" | |
943 | instructions. */ | |
944 | code = bfd_get_8 (input_bfd, | |
945 | contents + irel->r_offset - 1); | |
946 | if (code != 0xdd && code != 0xcd) | |
947 | hash->flags |= MN10300_CONVERT_CALL_TO_CALLS; | |
948 | ||
6cdc0ccc AM |
949 | /* If this is a jump/call, then bump the |
950 | direct_calls counter. Else force "call" to | |
951 | "calls" conversions. */ | |
252b5132 RH |
952 | if (r_type == R_MN10300_PCREL32 |
953 | || r_type == R_MN10300_PCREL16) | |
954 | hash->direct_calls++; | |
955 | else | |
956 | hash->flags |= MN10300_CONVERT_CALL_TO_CALLS; | |
957 | } | |
958 | } | |
959 | ||
960 | /* Now look at the actual contents to get the stack size, | |
961 | and a list of what registers were saved in the prologue | |
962 | (ie movm_args). */ | |
963 | if ((section->flags & SEC_CODE) != 0) | |
964 | { | |
6cdc0ccc | 965 | Elf_Internal_Sym *isym, *isymend; |
9ad5cbcf | 966 | unsigned int sec_shndx; |
6cdc0ccc AM |
967 | struct elf_link_hash_entry **hashes; |
968 | struct elf_link_hash_entry **end_hashes; | |
969 | unsigned int symcount; | |
252b5132 | 970 | |
9ad5cbcf AM |
971 | sec_shndx = _bfd_elf_section_from_bfd_section (input_bfd, |
972 | section); | |
252b5132 | 973 | |
252b5132 RH |
974 | /* Look at each function defined in this section and |
975 | update info for that function. */ | |
6cdc0ccc AM |
976 | isymend = isymbuf + symtab_hdr->sh_info; |
977 | for (isym = isymbuf; isym < isymend; isym++) | |
252b5132 | 978 | { |
6cdc0ccc AM |
979 | if (isym->st_shndx == sec_shndx |
980 | && ELF_ST_TYPE (isym->st_info) == STT_FUNC) | |
252b5132 | 981 | { |
dc810e39 AM |
982 | struct elf_link_hash_table *elftab; |
983 | bfd_size_type amt; | |
984 | ||
6cdc0ccc | 985 | if (isym->st_shndx == SHN_UNDEF) |
252b5132 | 986 | sym_sec = bfd_und_section_ptr; |
6cdc0ccc | 987 | else if (isym->st_shndx == SHN_ABS) |
252b5132 | 988 | sym_sec = bfd_abs_section_ptr; |
6cdc0ccc | 989 | else if (isym->st_shndx == SHN_COMMON) |
252b5132 | 990 | sym_sec = bfd_com_section_ptr; |
9ad5cbcf AM |
991 | else |
992 | sym_sec | |
993 | = bfd_section_from_elf_index (input_bfd, | |
6cdc0ccc | 994 | isym->st_shndx); |
252b5132 | 995 | |
dc810e39 AM |
996 | sym_name = (bfd_elf_string_from_elf_section |
997 | (input_bfd, symtab_hdr->sh_link, | |
6cdc0ccc | 998 | isym->st_name)); |
252b5132 RH |
999 | |
1000 | /* Tack on an ID so we can uniquely identify this | |
1001 | local symbol in the global hash table. */ | |
dc810e39 AM |
1002 | amt = strlen (sym_name) + 10; |
1003 | new_name = bfd_malloc (amt); | |
252b5132 RH |
1004 | if (new_name == 0) |
1005 | goto error_return; | |
1006 | ||
010ac81f KH |
1007 | sprintf (new_name, "%s_%08x", |
1008 | sym_name, (int) sym_sec); | |
252b5132 RH |
1009 | sym_name = new_name; |
1010 | ||
dc810e39 AM |
1011 | elftab = &hash_table->static_hash_table->root; |
1012 | hash = ((struct elf32_mn10300_link_hash_entry *) | |
1013 | elf_link_hash_lookup (elftab, sym_name, | |
1014 | true, true, false)); | |
252b5132 RH |
1015 | free (new_name); |
1016 | compute_function_info (input_bfd, hash, | |
6cdc0ccc | 1017 | isym->st_value, contents); |
252b5132 RH |
1018 | } |
1019 | } | |
1020 | ||
6cdc0ccc AM |
1021 | symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) |
1022 | - symtab_hdr->sh_info); | |
1023 | hashes = elf_sym_hashes (abfd); | |
1024 | end_hashes = hashes + symcount; | |
1025 | for (; hashes < end_hashes; hashes++) | |
252b5132 | 1026 | { |
6cdc0ccc | 1027 | hash = (struct elf32_mn10300_link_hash_entry *) *hashes; |
9ad5cbcf AM |
1028 | if ((hash->root.root.type == bfd_link_hash_defined |
1029 | || hash->root.root.type == bfd_link_hash_defweak) | |
1030 | && hash->root.root.u.def.section == section | |
6cdc0ccc | 1031 | && ELF_ST_TYPE (isym->st_info) == STT_FUNC) |
252b5132 RH |
1032 | compute_function_info (input_bfd, hash, |
1033 | (hash)->root.root.u.def.value, | |
1034 | contents); | |
1035 | } | |
1036 | } | |
1037 | ||
1038 | /* Cache or free any memory we allocated for the relocs. */ | |
6cdc0ccc AM |
1039 | if (internal_relocs != NULL |
1040 | && elf_section_data (section)->relocs != internal_relocs) | |
1041 | free (internal_relocs); | |
1042 | internal_relocs = NULL; | |
252b5132 RH |
1043 | |
1044 | /* Cache or free any memory we allocated for the contents. */ | |
6cdc0ccc AM |
1045 | if (contents != NULL |
1046 | && elf_section_data (section)->this_hdr.contents != contents) | |
252b5132 RH |
1047 | { |
1048 | if (! link_info->keep_memory) | |
6cdc0ccc | 1049 | free (contents); |
252b5132 RH |
1050 | else |
1051 | { | |
1052 | /* Cache the section contents for elf_link_input_bfd. */ | |
1053 | elf_section_data (section)->this_hdr.contents = contents; | |
1054 | } | |
252b5132 | 1055 | } |
6cdc0ccc | 1056 | contents = NULL; |
9ad5cbcf AM |
1057 | } |
1058 | ||
252b5132 | 1059 | /* Cache or free any memory we allocated for the symbols. */ |
6cdc0ccc AM |
1060 | if (isymbuf != NULL |
1061 | && symtab_hdr->contents != (unsigned char *) isymbuf) | |
252b5132 RH |
1062 | { |
1063 | if (! link_info->keep_memory) | |
6cdc0ccc | 1064 | free (isymbuf); |
252b5132 RH |
1065 | else |
1066 | { | |
1067 | /* Cache the symbols for elf_link_input_bfd. */ | |
6cdc0ccc | 1068 | symtab_hdr->contents = (unsigned char *) isymbuf; |
252b5132 | 1069 | } |
252b5132 | 1070 | } |
6cdc0ccc | 1071 | isymbuf = NULL; |
252b5132 RH |
1072 | } |
1073 | ||
1074 | /* Now iterate on each symbol in the hash table and perform | |
1075 | the final initialization steps on each. */ | |
1076 | elf32_mn10300_link_hash_traverse (hash_table, | |
1077 | elf32_mn10300_finish_hash_table_entry, | |
1078 | NULL); | |
1079 | elf32_mn10300_link_hash_traverse (hash_table->static_hash_table, | |
1080 | elf32_mn10300_finish_hash_table_entry, | |
1081 | NULL); | |
1082 | ||
1083 | /* All entries in the hash table are fully initialized. */ | |
1084 | hash_table->flags |= MN10300_HASH_ENTRIES_INITIALIZED; | |
1085 | ||
1086 | /* Now that everything has been initialized, go through each | |
1087 | code section and delete any prologue insns which will be | |
1088 | redundant because their operations will be performed by | |
1089 | a "call" instruction. */ | |
1090 | for (input_bfd = link_info->input_bfds; | |
1091 | input_bfd != NULL; | |
1092 | input_bfd = input_bfd->link_next) | |
1093 | { | |
9ad5cbcf | 1094 | /* We're going to need all the local symbols for each bfd. */ |
252b5132 | 1095 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
6cdc0ccc | 1096 | if (symtab_hdr->sh_info != 0) |
9ad5cbcf | 1097 | { |
6cdc0ccc AM |
1098 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
1099 | if (isymbuf == NULL) | |
1100 | isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, | |
1101 | symtab_hdr->sh_info, 0, | |
1102 | NULL, NULL, NULL); | |
1103 | if (isymbuf == NULL) | |
9ad5cbcf | 1104 | goto error_return; |
010ac81f | 1105 | } |
252b5132 RH |
1106 | |
1107 | /* Walk over each section in this bfd. */ | |
1108 | for (section = input_bfd->sections; | |
1109 | section != NULL; | |
1110 | section = section->next) | |
1111 | { | |
9ad5cbcf | 1112 | unsigned int sec_shndx; |
6cdc0ccc AM |
1113 | Elf_Internal_Sym *isym, *isymend; |
1114 | struct elf_link_hash_entry **hashes; | |
1115 | struct elf_link_hash_entry **end_hashes; | |
1116 | unsigned int symcount; | |
252b5132 RH |
1117 | |
1118 | /* Skip non-code sections and empty sections. */ | |
1119 | if ((section->flags & SEC_CODE) == 0 || section->_raw_size == 0) | |
1120 | continue; | |
1121 | ||
1122 | if (section->reloc_count != 0) | |
1123 | { | |
010ac81f KH |
1124 | /* Get a copy of the native relocations. */ |
1125 | internal_relocs = (_bfd_elf32_link_read_relocs | |
1126 | (input_bfd, section, (PTR) NULL, | |
1127 | (Elf_Internal_Rela *) NULL, | |
1128 | link_info->keep_memory)); | |
1129 | if (internal_relocs == NULL) | |
1130 | goto error_return; | |
252b5132 RH |
1131 | } |
1132 | ||
1133 | /* Get cached copy of section contents if it exists. */ | |
1134 | if (elf_section_data (section)->this_hdr.contents != NULL) | |
1135 | contents = elf_section_data (section)->this_hdr.contents; | |
1136 | else | |
1137 | { | |
1138 | /* Go get them off disk. */ | |
010ac81f | 1139 | contents = (bfd_byte *) bfd_malloc (section->_raw_size); |
252b5132 RH |
1140 | if (contents == NULL) |
1141 | goto error_return; | |
252b5132 RH |
1142 | |
1143 | if (!bfd_get_section_contents (input_bfd, section, | |
1144 | contents, (file_ptr) 0, | |
1145 | section->_raw_size)) | |
1146 | goto error_return; | |
1147 | } | |
1148 | ||
9ad5cbcf AM |
1149 | sec_shndx = _bfd_elf_section_from_bfd_section (input_bfd, |
1150 | section); | |
252b5132 RH |
1151 | |
1152 | /* Now look for any function in this section which needs | |
1153 | insns deleted from its prologue. */ | |
6cdc0ccc AM |
1154 | isymend = isymbuf + symtab_hdr->sh_info; |
1155 | for (isym = isymbuf; isym < isymend; isym++) | |
252b5132 | 1156 | { |
252b5132 | 1157 | struct elf32_mn10300_link_hash_entry *sym_hash; |
86033394 | 1158 | asection *sym_sec = NULL; |
252b5132 | 1159 | const char *sym_name; |
252b5132 | 1160 | char *new_name; |
dc810e39 AM |
1161 | struct elf_link_hash_table *elftab; |
1162 | bfd_size_type amt; | |
252b5132 | 1163 | |
6cdc0ccc | 1164 | if (isym->st_shndx != sec_shndx) |
252b5132 RH |
1165 | continue; |
1166 | ||
6cdc0ccc | 1167 | if (isym->st_shndx == SHN_UNDEF) |
252b5132 | 1168 | sym_sec = bfd_und_section_ptr; |
6cdc0ccc | 1169 | else if (isym->st_shndx == SHN_ABS) |
252b5132 | 1170 | sym_sec = bfd_abs_section_ptr; |
6cdc0ccc | 1171 | else if (isym->st_shndx == SHN_COMMON) |
252b5132 | 1172 | sym_sec = bfd_com_section_ptr; |
86033394 | 1173 | else |
9ad5cbcf | 1174 | sym_sec |
6cdc0ccc | 1175 | = bfd_section_from_elf_index (input_bfd, isym->st_shndx); |
a7c10850 | 1176 | |
9ad5cbcf AM |
1177 | sym_name |
1178 | = bfd_elf_string_from_elf_section (input_bfd, | |
1179 | symtab_hdr->sh_link, | |
6cdc0ccc | 1180 | isym->st_name); |
252b5132 RH |
1181 | |
1182 | /* Tack on an ID so we can uniquely identify this | |
1183 | local symbol in the global hash table. */ | |
dc810e39 AM |
1184 | amt = strlen (sym_name) + 10; |
1185 | new_name = bfd_malloc (amt); | |
252b5132 RH |
1186 | if (new_name == 0) |
1187 | goto error_return; | |
010ac81f | 1188 | sprintf (new_name, "%s_%08x", sym_name, (int) sym_sec); |
252b5132 RH |
1189 | sym_name = new_name; |
1190 | ||
dc810e39 AM |
1191 | elftab = &hash_table->static_hash_table->root; |
1192 | sym_hash = ((struct elf32_mn10300_link_hash_entry *) | |
1193 | elf_link_hash_lookup (elftab, sym_name, | |
1194 | false, false, false)); | |
252b5132 RH |
1195 | |
1196 | free (new_name); | |
1197 | if (sym_hash == NULL) | |
1198 | continue; | |
1199 | ||
9ad5cbcf AM |
1200 | if (! (sym_hash->flags & MN10300_CONVERT_CALL_TO_CALLS) |
1201 | && ! (sym_hash->flags & MN10300_DELETED_PROLOGUE_BYTES)) | |
252b5132 RH |
1202 | { |
1203 | int bytes = 0; | |
1204 | ||
1205 | /* Note that we've changed things. */ | |
1206 | elf_section_data (section)->relocs = internal_relocs; | |
252b5132 | 1207 | elf_section_data (section)->this_hdr.contents = contents; |
6cdc0ccc | 1208 | symtab_hdr->contents = (unsigned char *) isymbuf; |
252b5132 RH |
1209 | |
1210 | /* Count how many bytes we're going to delete. */ | |
1211 | if (sym_hash->movm_args) | |
1212 | bytes += 2; | |
1213 | ||
1214 | if (sym_hash->stack_size && sym_hash->stack_size <= 128) | |
1215 | bytes += 3; | |
1216 | else if (sym_hash->stack_size | |
1217 | && sym_hash->stack_size < 256) | |
1218 | bytes += 4; | |
1219 | ||
1220 | /* Note that we've deleted prologue bytes for this | |
1221 | function. */ | |
1222 | sym_hash->flags |= MN10300_DELETED_PROLOGUE_BYTES; | |
1223 | ||
1224 | /* Actually delete the bytes. */ | |
1225 | if (!mn10300_elf_relax_delete_bytes (input_bfd, | |
1226 | section, | |
6cdc0ccc | 1227 | isym->st_value, |
252b5132 RH |
1228 | bytes)) |
1229 | goto error_return; | |
1230 | ||
1231 | /* Something changed. Not strictly necessary, but | |
1232 | may lead to more relaxing opportunities. */ | |
1233 | *again = true; | |
1234 | } | |
1235 | } | |
1236 | ||
1237 | /* Look for any global functions in this section which | |
1238 | need insns deleted from their prologues. */ | |
6cdc0ccc | 1239 | symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) |
9ad5cbcf | 1240 | - symtab_hdr->sh_info); |
6cdc0ccc AM |
1241 | hashes = elf_sym_hashes (abfd); |
1242 | end_hashes = hashes + symcount; | |
1243 | for (; hashes < end_hashes; hashes++) | |
252b5132 | 1244 | { |
252b5132 RH |
1245 | struct elf32_mn10300_link_hash_entry *sym_hash; |
1246 | ||
6cdc0ccc | 1247 | sym_hash = (struct elf32_mn10300_link_hash_entry *) *hashes; |
9ad5cbcf AM |
1248 | if ((sym_hash->root.root.type == bfd_link_hash_defined |
1249 | || sym_hash->root.root.type == bfd_link_hash_defweak) | |
1250 | && sym_hash->root.root.u.def.section == section | |
1251 | && ! (sym_hash->flags & MN10300_CONVERT_CALL_TO_CALLS) | |
1252 | && ! (sym_hash->flags & MN10300_DELETED_PROLOGUE_BYTES)) | |
252b5132 RH |
1253 | { |
1254 | int bytes = 0; | |
9ad5cbcf | 1255 | bfd_vma symval; |
252b5132 RH |
1256 | |
1257 | /* Note that we've changed things. */ | |
1258 | elf_section_data (section)->relocs = internal_relocs; | |
252b5132 | 1259 | elf_section_data (section)->this_hdr.contents = contents; |
6cdc0ccc | 1260 | symtab_hdr->contents = (unsigned char *) isymbuf; |
252b5132 RH |
1261 | |
1262 | /* Count how many bytes we're going to delete. */ | |
1263 | if (sym_hash->movm_args) | |
1264 | bytes += 2; | |
1265 | ||
1266 | if (sym_hash->stack_size && sym_hash->stack_size <= 128) | |
1267 | bytes += 3; | |
1268 | else if (sym_hash->stack_size | |
1269 | && sym_hash->stack_size < 256) | |
1270 | bytes += 4; | |
1271 | ||
1272 | /* Note that we've deleted prologue bytes for this | |
1273 | function. */ | |
1274 | sym_hash->flags |= MN10300_DELETED_PROLOGUE_BYTES; | |
1275 | ||
1276 | /* Actually delete the bytes. */ | |
9ad5cbcf | 1277 | symval = sym_hash->root.root.u.def.value; |
252b5132 RH |
1278 | if (!mn10300_elf_relax_delete_bytes (input_bfd, |
1279 | section, | |
9ad5cbcf | 1280 | symval, |
252b5132 RH |
1281 | bytes)) |
1282 | goto error_return; | |
1283 | ||
1284 | /* Something changed. Not strictly necessary, but | |
1285 | may lead to more relaxing opportunities. */ | |
1286 | *again = true; | |
1287 | } | |
1288 | } | |
1289 | ||
1290 | /* Cache or free any memory we allocated for the relocs. */ | |
6cdc0ccc AM |
1291 | if (internal_relocs != NULL |
1292 | && elf_section_data (section)->relocs != internal_relocs) | |
1293 | free (internal_relocs); | |
1294 | internal_relocs = NULL; | |
252b5132 RH |
1295 | |
1296 | /* Cache or free any memory we allocated for the contents. */ | |
6cdc0ccc AM |
1297 | if (contents != NULL |
1298 | && elf_section_data (section)->this_hdr.contents != contents) | |
252b5132 RH |
1299 | { |
1300 | if (! link_info->keep_memory) | |
6cdc0ccc | 1301 | free (contents); |
252b5132 RH |
1302 | else |
1303 | { | |
1304 | /* Cache the section contents for elf_link_input_bfd. */ | |
1305 | elf_section_data (section)->this_hdr.contents = contents; | |
1306 | } | |
252b5132 | 1307 | } |
6cdc0ccc | 1308 | contents = NULL; |
9ad5cbcf AM |
1309 | } |
1310 | ||
252b5132 | 1311 | /* Cache or free any memory we allocated for the symbols. */ |
6cdc0ccc AM |
1312 | if (isymbuf != NULL |
1313 | && symtab_hdr->contents != (unsigned char *) isymbuf) | |
252b5132 RH |
1314 | { |
1315 | if (! link_info->keep_memory) | |
6cdc0ccc AM |
1316 | free (isymbuf); |
1317 | else | |
252b5132 | 1318 | { |
6cdc0ccc AM |
1319 | /* Cache the symbols for elf_link_input_bfd. */ |
1320 | symtab_hdr->contents = (unsigned char *) isymbuf; | |
252b5132 | 1321 | } |
252b5132 | 1322 | } |
6cdc0ccc | 1323 | isymbuf = NULL; |
252b5132 RH |
1324 | } |
1325 | } | |
1326 | ||
252b5132 RH |
1327 | /* (Re)initialize for the basic instruction shortening/relaxing pass. */ |
1328 | contents = NULL; | |
252b5132 | 1329 | internal_relocs = NULL; |
6cdc0ccc AM |
1330 | isymbuf = NULL; |
1331 | /* For error_return. */ | |
1332 | section = sec; | |
252b5132 RH |
1333 | |
1334 | /* We don't have to do anything for a relocateable link, if | |
1335 | this section does not have relocs, or if this is not a | |
1336 | code section. */ | |
1337 | if (link_info->relocateable | |
1338 | || (sec->flags & SEC_RELOC) == 0 | |
1339 | || sec->reloc_count == 0 | |
1340 | || (sec->flags & SEC_CODE) == 0) | |
1341 | return true; | |
1342 | ||
1343 | /* If this is the first time we have been called for this section, | |
1344 | initialize the cooked size. */ | |
1345 | if (sec->_cooked_size == 0) | |
1346 | sec->_cooked_size = sec->_raw_size; | |
1347 | ||
1348 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
1349 | ||
1350 | /* Get a copy of the native relocations. */ | |
1351 | internal_relocs = (_bfd_elf32_link_read_relocs | |
1352 | (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL, | |
1353 | link_info->keep_memory)); | |
1354 | if (internal_relocs == NULL) | |
1355 | goto error_return; | |
252b5132 RH |
1356 | |
1357 | /* Walk through them looking for relaxing opportunities. */ | |
1358 | irelend = internal_relocs + sec->reloc_count; | |
1359 | for (irel = internal_relocs; irel < irelend; irel++) | |
1360 | { | |
1361 | bfd_vma symval; | |
1362 | struct elf32_mn10300_link_hash_entry *h = NULL; | |
1363 | ||
1364 | /* If this isn't something that can be relaxed, then ignore | |
1365 | this reloc. */ | |
1366 | if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_NONE | |
1367 | || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_8 | |
1368 | || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_MAX) | |
1369 | continue; | |
1370 | ||
1371 | /* Get the section contents if we haven't done so already. */ | |
1372 | if (contents == NULL) | |
1373 | { | |
1374 | /* Get cached copy if it exists. */ | |
1375 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
1376 | contents = elf_section_data (sec)->this_hdr.contents; | |
1377 | else | |
1378 | { | |
1379 | /* Go get them off disk. */ | |
1380 | contents = (bfd_byte *) bfd_malloc (sec->_raw_size); | |
1381 | if (contents == NULL) | |
1382 | goto error_return; | |
252b5132 RH |
1383 | |
1384 | if (! bfd_get_section_contents (abfd, sec, contents, | |
1385 | (file_ptr) 0, sec->_raw_size)) | |
1386 | goto error_return; | |
1387 | } | |
1388 | } | |
1389 | ||
6cdc0ccc AM |
1390 | /* Read this BFD's symbols if we haven't done so already. */ |
1391 | if (isymbuf == NULL && symtab_hdr->sh_info != 0) | |
252b5132 | 1392 | { |
6cdc0ccc AM |
1393 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
1394 | if (isymbuf == NULL) | |
1395 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
1396 | symtab_hdr->sh_info, 0, | |
1397 | NULL, NULL, NULL); | |
1398 | if (isymbuf == NULL) | |
1399 | goto error_return; | |
252b5132 RH |
1400 | } |
1401 | ||
1402 | /* Get the value of the symbol referred to by the reloc. */ | |
1403 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) | |
1404 | { | |
6cdc0ccc | 1405 | Elf_Internal_Sym *isym; |
86033394 | 1406 | asection *sym_sec = NULL; |
252b5132 RH |
1407 | const char *sym_name; |
1408 | char *new_name; | |
1409 | ||
1410 | /* A local symbol. */ | |
6cdc0ccc AM |
1411 | isym = isymbuf + ELF32_R_SYM (irel->r_info); |
1412 | if (isym->st_shndx == SHN_UNDEF) | |
252b5132 | 1413 | sym_sec = bfd_und_section_ptr; |
6cdc0ccc | 1414 | else if (isym->st_shndx == SHN_ABS) |
252b5132 | 1415 | sym_sec = bfd_abs_section_ptr; |
6cdc0ccc | 1416 | else if (isym->st_shndx == SHN_COMMON) |
252b5132 | 1417 | sym_sec = bfd_com_section_ptr; |
86033394 | 1418 | else |
6cdc0ccc | 1419 | sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); |
a7c10850 | 1420 | |
6cdc0ccc | 1421 | symval = (isym->st_value |
252b5132 RH |
1422 | + sym_sec->output_section->vma |
1423 | + sym_sec->output_offset); | |
1424 | sym_name = bfd_elf_string_from_elf_section (abfd, | |
1425 | symtab_hdr->sh_link, | |
6cdc0ccc | 1426 | isym->st_name); |
252b5132 RH |
1427 | |
1428 | /* Tack on an ID so we can uniquely identify this | |
1429 | local symbol in the global hash table. */ | |
dc810e39 | 1430 | new_name = bfd_malloc ((bfd_size_type) strlen (sym_name) + 10); |
252b5132 RH |
1431 | if (new_name == 0) |
1432 | goto error_return; | |
010ac81f | 1433 | sprintf (new_name, "%s_%08x", sym_name, (int) sym_sec); |
252b5132 RH |
1434 | sym_name = new_name; |
1435 | ||
1436 | h = (struct elf32_mn10300_link_hash_entry *) | |
1437 | elf_link_hash_lookup (&hash_table->static_hash_table->root, | |
1438 | sym_name, false, false, false); | |
1439 | free (new_name); | |
1440 | } | |
1441 | else | |
1442 | { | |
1443 | unsigned long indx; | |
1444 | ||
1445 | /* An external symbol. */ | |
1446 | indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; | |
1447 | h = (struct elf32_mn10300_link_hash_entry *) | |
1448 | (elf_sym_hashes (abfd)[indx]); | |
1449 | BFD_ASSERT (h != NULL); | |
1450 | if (h->root.root.type != bfd_link_hash_defined | |
1451 | && h->root.root.type != bfd_link_hash_defweak) | |
1452 | { | |
1453 | /* This appears to be a reference to an undefined | |
1454 | symbol. Just ignore it--it will be caught by the | |
1455 | regular reloc processing. */ | |
1456 | continue; | |
1457 | } | |
1458 | ||
1459 | symval = (h->root.root.u.def.value | |
1460 | + h->root.root.u.def.section->output_section->vma | |
1461 | + h->root.root.u.def.section->output_offset); | |
1462 | } | |
1463 | ||
1464 | /* For simplicity of coding, we are going to modify the section | |
1465 | contents, the section relocs, and the BFD symbol table. We | |
1466 | must tell the rest of the code not to free up this | |
1467 | information. It would be possible to instead create a table | |
1468 | of changes which have to be made, as is done in coff-mips.c; | |
1469 | that would be more work, but would require less memory when | |
1470 | the linker is run. */ | |
1471 | ||
1472 | /* Try to turn a 32bit pc-relative branch/call into a 16bit pc-relative | |
1473 | branch/call, also deal with "call" -> "calls" conversions and | |
1474 | insertion of prologue data into "call" instructions. */ | |
1475 | if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL32) | |
1476 | { | |
1477 | bfd_vma value = symval; | |
1478 | ||
1479 | /* If we've got a "call" instruction that needs to be turned | |
1480 | into a "calls" instruction, do so now. It saves a byte. */ | |
1481 | if (h && (h->flags & MN10300_CONVERT_CALL_TO_CALLS)) | |
1482 | { | |
1483 | unsigned char code; | |
1484 | ||
1485 | /* Get the opcode. */ | |
1486 | code = bfd_get_8 (abfd, contents + irel->r_offset - 1); | |
1487 | ||
1488 | /* Make sure we're working with a "call" instruction! */ | |
1489 | if (code == 0xdd) | |
1490 | { | |
1491 | /* Note that we've changed the relocs, section contents, | |
1492 | etc. */ | |
1493 | elf_section_data (sec)->relocs = internal_relocs; | |
252b5132 | 1494 | elf_section_data (sec)->this_hdr.contents = contents; |
6cdc0ccc | 1495 | symtab_hdr->contents = (unsigned char *) isymbuf; |
252b5132 RH |
1496 | |
1497 | /* Fix the opcode. */ | |
1498 | bfd_put_8 (abfd, 0xfc, contents + irel->r_offset - 1); | |
1499 | bfd_put_8 (abfd, 0xff, contents + irel->r_offset); | |
1500 | ||
1501 | /* Fix irel->r_offset and irel->r_addend. */ | |
1502 | irel->r_offset += 1; | |
1503 | irel->r_addend += 1; | |
1504 | ||
1505 | /* Delete one byte of data. */ | |
1506 | if (!mn10300_elf_relax_delete_bytes (abfd, sec, | |
1507 | irel->r_offset + 3, 1)) | |
1508 | goto error_return; | |
1509 | ||
1510 | /* That will change things, so, we should relax again. | |
1511 | Note that this is not required, and it may be slow. */ | |
1512 | *again = true; | |
1513 | } | |
1514 | } | |
1515 | else if (h) | |
1516 | { | |
1517 | /* We've got a "call" instruction which needs some data | |
1518 | from target function filled in. */ | |
1519 | unsigned char code; | |
1520 | ||
1521 | /* Get the opcode. */ | |
1522 | code = bfd_get_8 (abfd, contents + irel->r_offset - 1); | |
1523 | ||
1524 | /* Insert data from the target function into the "call" | |
1525 | instruction if needed. */ | |
1526 | if (code == 0xdd) | |
1527 | { | |
1528 | bfd_put_8 (abfd, h->movm_args, contents + irel->r_offset + 4); | |
1529 | bfd_put_8 (abfd, h->stack_size + h->movm_stack_size, | |
1530 | contents + irel->r_offset + 5); | |
1531 | } | |
1532 | } | |
1533 | ||
1534 | /* Deal with pc-relative gunk. */ | |
1535 | value -= (sec->output_section->vma + sec->output_offset); | |
1536 | value -= irel->r_offset; | |
1537 | value += irel->r_addend; | |
1538 | ||
1539 | /* See if the value will fit in 16 bits, note the high value is | |
1540 | 0x7fff + 2 as the target will be two bytes closer if we are | |
1541 | able to relax. */ | |
010ac81f | 1542 | if ((long) value < 0x8001 && (long) value > -0x8000) |
252b5132 RH |
1543 | { |
1544 | unsigned char code; | |
1545 | ||
1546 | /* Get the opcode. */ | |
1547 | code = bfd_get_8 (abfd, contents + irel->r_offset - 1); | |
1548 | ||
1549 | if (code != 0xdc && code != 0xdd && code != 0xff) | |
1550 | continue; | |
1551 | ||
1552 | /* Note that we've changed the relocs, section contents, etc. */ | |
1553 | elf_section_data (sec)->relocs = internal_relocs; | |
252b5132 | 1554 | elf_section_data (sec)->this_hdr.contents = contents; |
6cdc0ccc | 1555 | symtab_hdr->contents = (unsigned char *) isymbuf; |
252b5132 RH |
1556 | |
1557 | /* Fix the opcode. */ | |
1558 | if (code == 0xdc) | |
1559 | bfd_put_8 (abfd, 0xcc, contents + irel->r_offset - 1); | |
1560 | else if (code == 0xdd) | |
1561 | bfd_put_8 (abfd, 0xcd, contents + irel->r_offset - 1); | |
1562 | else if (code == 0xff) | |
1563 | bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2); | |
1564 | ||
1565 | /* Fix the relocation's type. */ | |
1566 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
1567 | R_MN10300_PCREL16); | |
1568 | ||
1569 | /* Delete two bytes of data. */ | |
1570 | if (!mn10300_elf_relax_delete_bytes (abfd, sec, | |
1571 | irel->r_offset + 1, 2)) | |
1572 | goto error_return; | |
1573 | ||
1574 | /* That will change things, so, we should relax again. | |
1575 | Note that this is not required, and it may be slow. */ | |
1576 | *again = true; | |
1577 | } | |
1578 | } | |
1579 | ||
1580 | /* Try to turn a 16bit pc-relative branch into a 8bit pc-relative | |
1581 | branch. */ | |
1582 | if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL16) | |
1583 | { | |
1584 | bfd_vma value = symval; | |
1585 | ||
1586 | /* If we've got a "call" instruction that needs to be turned | |
1587 | into a "calls" instruction, do so now. It saves a byte. */ | |
1588 | if (h && (h->flags & MN10300_CONVERT_CALL_TO_CALLS)) | |
1589 | { | |
1590 | unsigned char code; | |
1591 | ||
1592 | /* Get the opcode. */ | |
1593 | code = bfd_get_8 (abfd, contents + irel->r_offset - 1); | |
1594 | ||
1595 | /* Make sure we're working with a "call" instruction! */ | |
1596 | if (code == 0xcd) | |
1597 | { | |
1598 | /* Note that we've changed the relocs, section contents, | |
1599 | etc. */ | |
1600 | elf_section_data (sec)->relocs = internal_relocs; | |
252b5132 | 1601 | elf_section_data (sec)->this_hdr.contents = contents; |
6cdc0ccc | 1602 | symtab_hdr->contents = (unsigned char *) isymbuf; |
252b5132 RH |
1603 | |
1604 | /* Fix the opcode. */ | |
1605 | bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 1); | |
1606 | bfd_put_8 (abfd, 0xff, contents + irel->r_offset); | |
1607 | ||
1608 | /* Fix irel->r_offset and irel->r_addend. */ | |
1609 | irel->r_offset += 1; | |
1610 | irel->r_addend += 1; | |
1611 | ||
1612 | /* Delete one byte of data. */ | |
1613 | if (!mn10300_elf_relax_delete_bytes (abfd, sec, | |
1614 | irel->r_offset + 1, 1)) | |
1615 | goto error_return; | |
1616 | ||
1617 | /* That will change things, so, we should relax again. | |
1618 | Note that this is not required, and it may be slow. */ | |
1619 | *again = true; | |
1620 | } | |
1621 | } | |
1622 | else if (h) | |
1623 | { | |
1624 | unsigned char code; | |
1625 | ||
1626 | /* Get the opcode. */ | |
1627 | code = bfd_get_8 (abfd, contents + irel->r_offset - 1); | |
1628 | ||
1629 | /* Insert data from the target function into the "call" | |
1630 | instruction if needed. */ | |
1631 | if (code == 0xcd) | |
1632 | { | |
1633 | bfd_put_8 (abfd, h->movm_args, contents + irel->r_offset + 2); | |
1634 | bfd_put_8 (abfd, h->stack_size + h->movm_stack_size, | |
1635 | contents + irel->r_offset + 3); | |
1636 | } | |
1637 | } | |
1638 | ||
1639 | /* Deal with pc-relative gunk. */ | |
1640 | value -= (sec->output_section->vma + sec->output_offset); | |
1641 | value -= irel->r_offset; | |
1642 | value += irel->r_addend; | |
1643 | ||
1644 | /* See if the value will fit in 8 bits, note the high value is | |
1645 | 0x7f + 1 as the target will be one bytes closer if we are | |
1646 | able to relax. */ | |
010ac81f | 1647 | if ((long) value < 0x80 && (long) value > -0x80) |
252b5132 RH |
1648 | { |
1649 | unsigned char code; | |
1650 | ||
1651 | /* Get the opcode. */ | |
1652 | code = bfd_get_8 (abfd, contents + irel->r_offset - 1); | |
1653 | ||
1654 | if (code != 0xcc) | |
1655 | continue; | |
1656 | ||
1657 | /* Note that we've changed the relocs, section contents, etc. */ | |
1658 | elf_section_data (sec)->relocs = internal_relocs; | |
252b5132 | 1659 | elf_section_data (sec)->this_hdr.contents = contents; |
6cdc0ccc | 1660 | symtab_hdr->contents = (unsigned char *) isymbuf; |
252b5132 RH |
1661 | |
1662 | /* Fix the opcode. */ | |
1663 | bfd_put_8 (abfd, 0xca, contents + irel->r_offset - 1); | |
1664 | ||
1665 | /* Fix the relocation's type. */ | |
1666 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
1667 | R_MN10300_PCREL8); | |
1668 | ||
1669 | /* Delete one byte of data. */ | |
1670 | if (!mn10300_elf_relax_delete_bytes (abfd, sec, | |
1671 | irel->r_offset + 1, 1)) | |
1672 | goto error_return; | |
1673 | ||
1674 | /* That will change things, so, we should relax again. | |
1675 | Note that this is not required, and it may be slow. */ | |
1676 | *again = true; | |
1677 | } | |
1678 | } | |
1679 | ||
1680 | /* Try to eliminate an unconditional 8 bit pc-relative branch | |
1681 | which immediately follows a conditional 8 bit pc-relative | |
1682 | branch around the unconditional branch. | |
1683 | ||
1684 | original: new: | |
1685 | bCC lab1 bCC' lab2 | |
1686 | bra lab2 | |
1687 | lab1: lab1: | |
1688 | ||
252b5132 RH |
1689 | This happens when the bCC can't reach lab2 at assembly time, |
1690 | but due to other relaxations it can reach at link time. */ | |
1691 | if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL8) | |
1692 | { | |
1693 | Elf_Internal_Rela *nrel; | |
1694 | bfd_vma value = symval; | |
1695 | unsigned char code; | |
1696 | ||
1697 | /* Deal with pc-relative gunk. */ | |
1698 | value -= (sec->output_section->vma + sec->output_offset); | |
1699 | value -= irel->r_offset; | |
1700 | value += irel->r_addend; | |
1701 | ||
1702 | /* Do nothing if this reloc is the last byte in the section. */ | |
1703 | if (irel->r_offset == sec->_cooked_size) | |
1704 | continue; | |
1705 | ||
1706 | /* See if the next instruction is an unconditional pc-relative | |
1707 | branch, more often than not this test will fail, so we | |
1708 | test it first to speed things up. */ | |
1709 | code = bfd_get_8 (abfd, contents + irel->r_offset + 1); | |
1710 | if (code != 0xca) | |
1711 | continue; | |
1712 | ||
1713 | /* Also make sure the next relocation applies to the next | |
1714 | instruction and that it's a pc-relative 8 bit branch. */ | |
1715 | nrel = irel + 1; | |
1716 | if (nrel == irelend | |
1717 | || irel->r_offset + 2 != nrel->r_offset | |
1718 | || ELF32_R_TYPE (nrel->r_info) != (int) R_MN10300_PCREL8) | |
1719 | continue; | |
1720 | ||
1721 | /* Make sure our destination immediately follows the | |
1722 | unconditional branch. */ | |
1723 | if (symval != (sec->output_section->vma + sec->output_offset | |
1724 | + irel->r_offset + 3)) | |
1725 | continue; | |
1726 | ||
1727 | /* Now make sure we are a conditional branch. This may not | |
1728 | be necessary, but why take the chance. | |
1729 | ||
1730 | Note these checks assume that R_MN10300_PCREL8 relocs | |
1731 | only occur on bCC and bCCx insns. If they occured | |
1732 | elsewhere, we'd need to know the start of this insn | |
1733 | for this check to be accurate. */ | |
1734 | code = bfd_get_8 (abfd, contents + irel->r_offset - 1); | |
1735 | if (code != 0xc0 && code != 0xc1 && code != 0xc2 | |
1736 | && code != 0xc3 && code != 0xc4 && code != 0xc5 | |
1737 | && code != 0xc6 && code != 0xc7 && code != 0xc8 | |
1738 | && code != 0xc9 && code != 0xe8 && code != 0xe9 | |
1739 | && code != 0xea && code != 0xeb) | |
1740 | continue; | |
1741 | ||
1742 | /* We also have to be sure there is no symbol/label | |
1743 | at the unconditional branch. */ | |
6cdc0ccc AM |
1744 | if (mn10300_elf_symbol_address_p (abfd, sec, isymbuf, |
1745 | irel->r_offset + 1)) | |
252b5132 RH |
1746 | continue; |
1747 | ||
1748 | /* Note that we've changed the relocs, section contents, etc. */ | |
1749 | elf_section_data (sec)->relocs = internal_relocs; | |
252b5132 | 1750 | elf_section_data (sec)->this_hdr.contents = contents; |
6cdc0ccc | 1751 | symtab_hdr->contents = (unsigned char *) isymbuf; |
252b5132 RH |
1752 | |
1753 | /* Reverse the condition of the first branch. */ | |
1754 | switch (code) | |
1755 | { | |
010ac81f KH |
1756 | case 0xc8: |
1757 | code = 0xc9; | |
1758 | break; | |
1759 | case 0xc9: | |
1760 | code = 0xc8; | |
1761 | break; | |
1762 | case 0xc0: | |
1763 | code = 0xc2; | |
1764 | break; | |
1765 | case 0xc2: | |
1766 | code = 0xc0; | |
1767 | break; | |
1768 | case 0xc3: | |
1769 | code = 0xc1; | |
1770 | break; | |
1771 | case 0xc1: | |
1772 | code = 0xc3; | |
1773 | break; | |
1774 | case 0xc4: | |
1775 | code = 0xc6; | |
1776 | break; | |
1777 | case 0xc6: | |
1778 | code = 0xc4; | |
1779 | break; | |
1780 | case 0xc7: | |
1781 | code = 0xc5; | |
1782 | break; | |
1783 | case 0xc5: | |
1784 | code = 0xc7; | |
1785 | break; | |
1786 | case 0xe8: | |
1787 | code = 0xe9; | |
1788 | break; | |
1789 | case 0x9d: | |
1790 | code = 0xe8; | |
1791 | break; | |
1792 | case 0xea: | |
1793 | code = 0xeb; | |
1794 | break; | |
1795 | case 0xeb: | |
1796 | code = 0xea; | |
1797 | break; | |
252b5132 RH |
1798 | } |
1799 | bfd_put_8 (abfd, code, contents + irel->r_offset - 1); | |
1800 | ||
1801 | /* Set the reloc type and symbol for the first branch | |
1802 | from the second branch. */ | |
1803 | irel->r_info = nrel->r_info; | |
1804 | ||
1805 | /* Make the reloc for the second branch a null reloc. */ | |
1806 | nrel->r_info = ELF32_R_INFO (ELF32_R_SYM (nrel->r_info), | |
1807 | R_MN10300_NONE); | |
1808 | ||
1809 | /* Delete two bytes of data. */ | |
1810 | if (!mn10300_elf_relax_delete_bytes (abfd, sec, | |
1811 | irel->r_offset + 1, 2)) | |
1812 | goto error_return; | |
1813 | ||
1814 | /* That will change things, so, we should relax again. | |
1815 | Note that this is not required, and it may be slow. */ | |
1816 | *again = true; | |
1817 | } | |
1818 | ||
31f8dc8f JL |
1819 | /* Try to turn a 24 immediate, displacement or absolute address |
1820 | into a 8 immediate, displacement or absolute address. */ | |
1821 | if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_24) | |
1822 | { | |
1823 | bfd_vma value = symval; | |
1824 | value += irel->r_addend; | |
1825 | ||
1826 | /* See if the value will fit in 8 bits. */ | |
010ac81f | 1827 | if ((long) value < 0x7f && (long) value > -0x80) |
31f8dc8f JL |
1828 | { |
1829 | unsigned char code; | |
1830 | ||
1831 | /* AM33 insns which have 24 operands are 6 bytes long and | |
1832 | will have 0xfd as the first byte. */ | |
1833 | ||
1834 | /* Get the first opcode. */ | |
1835 | code = bfd_get_8 (abfd, contents + irel->r_offset - 3); | |
1836 | ||
1837 | if (code == 0xfd) | |
1838 | { | |
010ac81f KH |
1839 | /* Get the second opcode. */ |
1840 | code = bfd_get_8 (abfd, contents + irel->r_offset - 2); | |
31f8dc8f JL |
1841 | |
1842 | /* We can not relax 0x6b, 0x7b, 0x8b, 0x9b as no 24bit | |
1843 | equivalent instructions exists. */ | |
1844 | if (code != 0x6b && code != 0x7b | |
1845 | && code != 0x8b && code != 0x9b | |
1846 | && ((code & 0x0f) == 0x09 || (code & 0x0f) == 0x08 | |
1847 | || (code & 0x0f) == 0x0a || (code & 0x0f) == 0x0b | |
1848 | || (code & 0x0f) == 0x0e)) | |
1849 | { | |
1850 | /* Not safe if the high bit is on as relaxing may | |
1851 | move the value out of high mem and thus not fit | |
1852 | in a signed 8bit value. This is currently over | |
1853 | conservative. */ | |
1854 | if ((value & 0x80) == 0) | |
1855 | { | |
1856 | /* Note that we've changed the relocation contents, | |
1857 | etc. */ | |
1858 | elf_section_data (sec)->relocs = internal_relocs; | |
31f8dc8f | 1859 | elf_section_data (sec)->this_hdr.contents = contents; |
6cdc0ccc | 1860 | symtab_hdr->contents = (unsigned char *) isymbuf; |
31f8dc8f JL |
1861 | |
1862 | /* Fix the opcode. */ | |
1863 | bfd_put_8 (abfd, 0xfb, contents + irel->r_offset - 3); | |
1864 | bfd_put_8 (abfd, code, contents + irel->r_offset - 2); | |
1865 | ||
1866 | /* Fix the relocation's type. */ | |
010ac81f KH |
1867 | irel->r_info = |
1868 | ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
1869 | R_MN10300_8); | |
31f8dc8f JL |
1870 | |
1871 | /* Delete two bytes of data. */ | |
1872 | if (!mn10300_elf_relax_delete_bytes (abfd, sec, | |
1873 | irel->r_offset + 1, 2)) | |
1874 | goto error_return; | |
1875 | ||
1876 | /* That will change things, so, we should relax | |
1877 | again. Note that this is not required, and it | |
010ac81f | 1878 | may be slow. */ |
31f8dc8f JL |
1879 | *again = true; |
1880 | break; | |
1881 | } | |
1882 | } | |
31f8dc8f JL |
1883 | } |
1884 | } | |
1885 | } | |
252b5132 RH |
1886 | |
1887 | /* Try to turn a 32bit immediate, displacement or absolute address | |
1888 | into a 16bit immediate, displacement or absolute address. */ | |
1889 | if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_32) | |
1890 | { | |
1891 | bfd_vma value = symval; | |
1892 | value += irel->r_addend; | |
1893 | ||
31f8dc8f JL |
1894 | /* See if the value will fit in 24 bits. |
1895 | We allow any 16bit match here. We prune those we can't | |
1896 | handle below. */ | |
010ac81f | 1897 | if ((long) value < 0x7fffff && (long) value > -0x800000) |
31f8dc8f JL |
1898 | { |
1899 | unsigned char code; | |
1900 | ||
1901 | /* AM33 insns which have 32bit operands are 7 bytes long and | |
1902 | will have 0xfe as the first byte. */ | |
1903 | ||
1904 | /* Get the first opcode. */ | |
1905 | code = bfd_get_8 (abfd, contents + irel->r_offset - 3); | |
1906 | ||
1907 | if (code == 0xfe) | |
1908 | { | |
1909 | /* Get the second opcode. */ | |
1910 | code = bfd_get_8 (abfd, contents + irel->r_offset - 2); | |
1911 | ||
1912 | /* All the am33 32 -> 24 relaxing possibilities. */ | |
1913 | /* We can not relax 0x6b, 0x7b, 0x8b, 0x9b as no 24bit | |
1914 | equivalent instructions exists. */ | |
010ac81f | 1915 | if (code != 0x6b && code != 0x7b |
31f8dc8f JL |
1916 | && code != 0x8b && code != 0x9b |
1917 | && ((code & 0x0f) == 0x09 || (code & 0x0f) == 0x08 | |
1918 | || (code & 0x0f) == 0x0a || (code & 0x0f) == 0x0b | |
1919 | || (code & 0x0f) == 0x0e)) | |
1920 | { | |
1921 | /* Not safe if the high bit is on as relaxing may | |
1922 | move the value out of high mem and thus not fit | |
1923 | in a signed 16bit value. This is currently over | |
1924 | conservative. */ | |
1925 | if ((value & 0x8000) == 0) | |
1926 | { | |
1927 | /* Note that we've changed the relocation contents, | |
1928 | etc. */ | |
1929 | elf_section_data (sec)->relocs = internal_relocs; | |
31f8dc8f | 1930 | elf_section_data (sec)->this_hdr.contents = contents; |
6cdc0ccc | 1931 | symtab_hdr->contents = (unsigned char *) isymbuf; |
31f8dc8f JL |
1932 | |
1933 | /* Fix the opcode. */ | |
1934 | bfd_put_8 (abfd, 0xfd, contents + irel->r_offset - 3); | |
1935 | bfd_put_8 (abfd, code, contents + irel->r_offset - 2); | |
1936 | ||
1937 | /* Fix the relocation's type. */ | |
010ac81f KH |
1938 | irel->r_info = |
1939 | ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
1940 | R_MN10300_24); | |
31f8dc8f JL |
1941 | |
1942 | /* Delete one byte of data. */ | |
1943 | if (!mn10300_elf_relax_delete_bytes (abfd, sec, | |
1944 | irel->r_offset + 3, 1)) | |
1945 | goto error_return; | |
1946 | ||
1947 | /* That will change things, so, we should relax | |
1948 | again. Note that this is not required, and it | |
010ac81f | 1949 | may be slow. */ |
31f8dc8f JL |
1950 | *again = true; |
1951 | break; | |
1952 | } | |
1953 | } | |
31f8dc8f JL |
1954 | } |
1955 | } | |
252b5132 RH |
1956 | |
1957 | /* See if the value will fit in 16 bits. | |
1958 | We allow any 16bit match here. We prune those we can't | |
1959 | handle below. */ | |
010ac81f | 1960 | if ((long) value < 0x7fff && (long) value > -0x8000) |
252b5132 RH |
1961 | { |
1962 | unsigned char code; | |
1963 | ||
1964 | /* Most insns which have 32bit operands are 6 bytes long; | |
1965 | exceptions are pcrel insns and bit insns. | |
1966 | ||
1967 | We handle pcrel insns above. We don't bother trying | |
1968 | to handle the bit insns here. | |
1969 | ||
1970 | The first byte of the remaining insns will be 0xfc. */ | |
1971 | ||
1972 | /* Get the first opcode. */ | |
1973 | code = bfd_get_8 (abfd, contents + irel->r_offset - 2); | |
1974 | ||
1975 | if (code != 0xfc) | |
1976 | continue; | |
1977 | ||
1978 | /* Get the second opcode. */ | |
1979 | code = bfd_get_8 (abfd, contents + irel->r_offset - 1); | |
1980 | ||
1981 | if ((code & 0xf0) < 0x80) | |
1982 | switch (code & 0xf0) | |
1983 | { | |
1984 | /* mov (d32,am),dn -> mov (d32,am),dn | |
1985 | mov dm,(d32,am) -> mov dn,(d32,am) | |
1986 | mov (d32,am),an -> mov (d32,am),an | |
1987 | mov dm,(d32,am) -> mov dn,(d32,am) | |
1988 | movbu (d32,am),dn -> movbu (d32,am),dn | |
1989 | movbu dm,(d32,am) -> movbu dn,(d32,am) | |
1990 | movhu (d32,am),dn -> movhu (d32,am),dn | |
1991 | movhu dm,(d32,am) -> movhu dn,(d32,am) */ | |
1992 | case 0x00: | |
1993 | case 0x10: | |
1994 | case 0x20: | |
1995 | case 0x30: | |
1996 | case 0x40: | |
1997 | case 0x50: | |
1998 | case 0x60: | |
1999 | case 0x70: | |
2000 | /* Not safe if the high bit is on as relaxing may | |
2001 | move the value out of high mem and thus not fit | |
2002 | in a signed 16bit value. */ | |
2003 | if (code == 0xcc | |
2004 | && (value & 0x8000)) | |
2005 | continue; | |
2006 | ||
2007 | /* Note that we've changed the relocation contents, etc. */ | |
2008 | elf_section_data (sec)->relocs = internal_relocs; | |
252b5132 | 2009 | elf_section_data (sec)->this_hdr.contents = contents; |
6cdc0ccc | 2010 | symtab_hdr->contents = (unsigned char *) isymbuf; |
252b5132 RH |
2011 | |
2012 | /* Fix the opcode. */ | |
2013 | bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2); | |
2014 | bfd_put_8 (abfd, code, contents + irel->r_offset - 1); | |
2015 | ||
2016 | /* Fix the relocation's type. */ | |
2017 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
2018 | R_MN10300_16); | |
2019 | ||
2020 | /* Delete two bytes of data. */ | |
2021 | if (!mn10300_elf_relax_delete_bytes (abfd, sec, | |
2022 | irel->r_offset + 2, 2)) | |
2023 | goto error_return; | |
2024 | ||
2025 | /* That will change things, so, we should relax again. | |
2026 | Note that this is not required, and it may be slow. */ | |
2027 | *again = true; | |
2028 | break; | |
2029 | } | |
2030 | else if ((code & 0xf0) == 0x80 | |
2031 | || (code & 0xf0) == 0x90) | |
2032 | switch (code & 0xf3) | |
2033 | { | |
2034 | /* mov dn,(abs32) -> mov dn,(abs16) | |
2035 | movbu dn,(abs32) -> movbu dn,(abs16) | |
2036 | movhu dn,(abs32) -> movhu dn,(abs16) */ | |
2037 | case 0x81: | |
2038 | case 0x82: | |
2039 | case 0x83: | |
2040 | /* Note that we've changed the relocation contents, etc. */ | |
2041 | elf_section_data (sec)->relocs = internal_relocs; | |
252b5132 | 2042 | elf_section_data (sec)->this_hdr.contents = contents; |
6cdc0ccc | 2043 | symtab_hdr->contents = (unsigned char *) isymbuf; |
252b5132 RH |
2044 | |
2045 | if ((code & 0xf3) == 0x81) | |
2046 | code = 0x01 + (code & 0x0c); | |
2047 | else if ((code & 0xf3) == 0x82) | |
2048 | code = 0x02 + (code & 0x0c); | |
2049 | else if ((code & 0xf3) == 0x83) | |
2050 | code = 0x03 + (code & 0x0c); | |
2051 | else | |
2052 | abort (); | |
2053 | ||
2054 | /* Fix the opcode. */ | |
2055 | bfd_put_8 (abfd, code, contents + irel->r_offset - 2); | |
2056 | ||
2057 | /* Fix the relocation's type. */ | |
2058 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
2059 | R_MN10300_16); | |
2060 | ||
2061 | /* The opcode got shorter too, so we have to fix the | |
2062 | addend and offset too! */ | |
2063 | irel->r_offset -= 1; | |
2064 | ||
2065 | /* Delete three bytes of data. */ | |
2066 | if (!mn10300_elf_relax_delete_bytes (abfd, sec, | |
2067 | irel->r_offset + 1, 3)) | |
2068 | goto error_return; | |
2069 | ||
2070 | /* That will change things, so, we should relax again. | |
2071 | Note that this is not required, and it may be slow. */ | |
2072 | *again = true; | |
2073 | break; | |
2074 | ||
2075 | /* mov am,(abs32) -> mov am,(abs16) | |
2076 | mov am,(d32,sp) -> mov am,(d16,sp) | |
2077 | mov dm,(d32,sp) -> mov dm,(d32,sp) | |
2078 | movbu dm,(d32,sp) -> movbu dm,(d32,sp) | |
2079 | movhu dm,(d32,sp) -> movhu dm,(d32,sp) */ | |
2080 | case 0x80: | |
2081 | case 0x90: | |
2082 | case 0x91: | |
2083 | case 0x92: | |
2084 | case 0x93: | |
2a0fa943 AO |
2085 | /* sp-based offsets are zero-extended. */ |
2086 | if (code >= 0x90 && code <= 0x93 | |
2087 | && (long)value < 0) | |
2088 | continue; | |
2089 | ||
252b5132 RH |
2090 | /* Note that we've changed the relocation contents, etc. */ |
2091 | elf_section_data (sec)->relocs = internal_relocs; | |
252b5132 | 2092 | elf_section_data (sec)->this_hdr.contents = contents; |
6cdc0ccc | 2093 | symtab_hdr->contents = (unsigned char *) isymbuf; |
252b5132 RH |
2094 | |
2095 | /* Fix the opcode. */ | |
2096 | bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2); | |
2097 | bfd_put_8 (abfd, code, contents + irel->r_offset - 1); | |
2098 | ||
2099 | /* Fix the relocation's type. */ | |
2100 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
2101 | R_MN10300_16); | |
2102 | ||
2103 | /* Delete two bytes of data. */ | |
2104 | if (!mn10300_elf_relax_delete_bytes (abfd, sec, | |
2105 | irel->r_offset + 2, 2)) | |
2106 | goto error_return; | |
2107 | ||
2108 | /* That will change things, so, we should relax again. | |
2109 | Note that this is not required, and it may be slow. */ | |
2110 | *again = true; | |
2111 | break; | |
2112 | } | |
2113 | else if ((code & 0xf0) < 0xf0) | |
2114 | switch (code & 0xfc) | |
2115 | { | |
2116 | /* mov imm32,dn -> mov imm16,dn | |
2117 | mov imm32,an -> mov imm16,an | |
2118 | mov (abs32),dn -> mov (abs16),dn | |
2119 | movbu (abs32),dn -> movbu (abs16),dn | |
2120 | movhu (abs32),dn -> movhu (abs16),dn */ | |
2121 | case 0xcc: | |
2122 | case 0xdc: | |
2123 | case 0xa4: | |
2124 | case 0xa8: | |
2125 | case 0xac: | |
2126 | /* Not safe if the high bit is on as relaxing may | |
2127 | move the value out of high mem and thus not fit | |
2128 | in a signed 16bit value. */ | |
2129 | if (code == 0xcc | |
2130 | && (value & 0x8000)) | |
2131 | continue; | |
2132 | ||
2a0fa943 AO |
2133 | /* mov imm16, an zero-extends the immediate. */ |
2134 | if (code == 0xdc | |
2135 | && (long)value < 0) | |
2136 | continue; | |
2137 | ||
252b5132 RH |
2138 | /* Note that we've changed the relocation contents, etc. */ |
2139 | elf_section_data (sec)->relocs = internal_relocs; | |
252b5132 | 2140 | elf_section_data (sec)->this_hdr.contents = contents; |
6cdc0ccc | 2141 | symtab_hdr->contents = (unsigned char *) isymbuf; |
252b5132 RH |
2142 | |
2143 | if ((code & 0xfc) == 0xcc) | |
2144 | code = 0x2c + (code & 0x03); | |
2145 | else if ((code & 0xfc) == 0xdc) | |
2146 | code = 0x24 + (code & 0x03); | |
2147 | else if ((code & 0xfc) == 0xa4) | |
2148 | code = 0x30 + (code & 0x03); | |
2149 | else if ((code & 0xfc) == 0xa8) | |
2150 | code = 0x34 + (code & 0x03); | |
2151 | else if ((code & 0xfc) == 0xac) | |
2152 | code = 0x38 + (code & 0x03); | |
2153 | else | |
2154 | abort (); | |
2155 | ||
2156 | /* Fix the opcode. */ | |
2157 | bfd_put_8 (abfd, code, contents + irel->r_offset - 2); | |
2158 | ||
2159 | /* Fix the relocation's type. */ | |
2160 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
2161 | R_MN10300_16); | |
2162 | ||
2163 | /* The opcode got shorter too, so we have to fix the | |
2164 | addend and offset too! */ | |
2165 | irel->r_offset -= 1; | |
2166 | ||
2167 | /* Delete three bytes of data. */ | |
2168 | if (!mn10300_elf_relax_delete_bytes (abfd, sec, | |
2169 | irel->r_offset + 1, 3)) | |
2170 | goto error_return; | |
2171 | ||
2172 | /* That will change things, so, we should relax again. | |
2173 | Note that this is not required, and it may be slow. */ | |
2174 | *again = true; | |
2175 | break; | |
2176 | ||
2177 | /* mov (abs32),an -> mov (abs16),an | |
2a0fa943 AO |
2178 | mov (d32,sp),an -> mov (d16,sp),an |
2179 | mov (d32,sp),dn -> mov (d16,sp),dn | |
2180 | movbu (d32,sp),dn -> movbu (d16,sp),dn | |
2181 | movhu (d32,sp),dn -> movhu (d16,sp),dn | |
252b5132 RH |
2182 | add imm32,dn -> add imm16,dn |
2183 | cmp imm32,dn -> cmp imm16,dn | |
2184 | add imm32,an -> add imm16,an | |
2185 | cmp imm32,an -> cmp imm16,an | |
2a0fa943 AO |
2186 | and imm32,dn -> and imm16,dn |
2187 | or imm32,dn -> or imm16,dn | |
2188 | xor imm32,dn -> xor imm16,dn | |
2189 | btst imm32,dn -> btst imm16,dn */ | |
252b5132 RH |
2190 | |
2191 | case 0xa0: | |
2192 | case 0xb0: | |
2193 | case 0xb1: | |
2194 | case 0xb2: | |
2195 | case 0xb3: | |
2196 | case 0xc0: | |
2197 | case 0xc8: | |
2198 | ||
2199 | case 0xd0: | |
2200 | case 0xd8: | |
2201 | case 0xe0: | |
2202 | case 0xe1: | |
2203 | case 0xe2: | |
2204 | case 0xe3: | |
2a0fa943 AO |
2205 | /* cmp imm16, an zero-extends the immediate. */ |
2206 | if (code == 0xdc | |
2207 | && (long)value < 0) | |
2208 | continue; | |
2209 | ||
2210 | /* So do sp-based offsets. */ | |
2211 | if (code >= 0xb0 && code <= 0xb3 | |
2212 | && (long)value < 0) | |
2213 | continue; | |
2214 | ||
252b5132 RH |
2215 | /* Note that we've changed the relocation contents, etc. */ |
2216 | elf_section_data (sec)->relocs = internal_relocs; | |
252b5132 | 2217 | elf_section_data (sec)->this_hdr.contents = contents; |
6cdc0ccc | 2218 | symtab_hdr->contents = (unsigned char *) isymbuf; |
252b5132 RH |
2219 | |
2220 | /* Fix the opcode. */ | |
2221 | bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2); | |
2222 | bfd_put_8 (abfd, code, contents + irel->r_offset - 1); | |
2223 | ||
2224 | /* Fix the relocation's type. */ | |
2225 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
2226 | R_MN10300_16); | |
2227 | ||
2228 | /* Delete two bytes of data. */ | |
2229 | if (!mn10300_elf_relax_delete_bytes (abfd, sec, | |
2230 | irel->r_offset + 2, 2)) | |
2231 | goto error_return; | |
2232 | ||
2233 | /* That will change things, so, we should relax again. | |
2234 | Note that this is not required, and it may be slow. */ | |
2235 | *again = true; | |
2236 | break; | |
2237 | } | |
2238 | else if (code == 0xfe) | |
2239 | { | |
2240 | /* add imm32,sp -> add imm16,sp */ | |
2241 | ||
2242 | /* Note that we've changed the relocation contents, etc. */ | |
2243 | elf_section_data (sec)->relocs = internal_relocs; | |
252b5132 | 2244 | elf_section_data (sec)->this_hdr.contents = contents; |
6cdc0ccc | 2245 | symtab_hdr->contents = (unsigned char *) isymbuf; |
252b5132 RH |
2246 | |
2247 | /* Fix the opcode. */ | |
2248 | bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2); | |
2249 | bfd_put_8 (abfd, 0xfe, contents + irel->r_offset - 1); | |
2250 | ||
2251 | /* Fix the relocation's type. */ | |
2252 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
010ac81f | 2253 | R_MN10300_16); |
252b5132 RH |
2254 | |
2255 | /* Delete two bytes of data. */ | |
2256 | if (!mn10300_elf_relax_delete_bytes (abfd, sec, | |
2257 | irel->r_offset + 2, 2)) | |
2258 | goto error_return; | |
2259 | ||
2260 | /* That will change things, so, we should relax again. | |
2261 | Note that this is not required, and it may be slow. */ | |
2262 | *again = true; | |
2263 | break; | |
2264 | } | |
2265 | } | |
2266 | } | |
2267 | } | |
2268 | ||
6cdc0ccc AM |
2269 | if (isymbuf != NULL |
2270 | && symtab_hdr->contents != (unsigned char *) isymbuf) | |
252b5132 RH |
2271 | { |
2272 | if (! link_info->keep_memory) | |
6cdc0ccc | 2273 | free (isymbuf); |
252b5132 RH |
2274 | else |
2275 | { | |
6cdc0ccc AM |
2276 | /* Cache the symbols for elf_link_input_bfd. */ |
2277 | symtab_hdr->contents = (unsigned char *) isymbuf; | |
252b5132 | 2278 | } |
9ad5cbcf AM |
2279 | } |
2280 | ||
6cdc0ccc AM |
2281 | if (contents != NULL |
2282 | && elf_section_data (sec)->this_hdr.contents != contents) | |
252b5132 RH |
2283 | { |
2284 | if (! link_info->keep_memory) | |
6cdc0ccc AM |
2285 | free (contents); |
2286 | else | |
252b5132 | 2287 | { |
6cdc0ccc AM |
2288 | /* Cache the section contents for elf_link_input_bfd. */ |
2289 | elf_section_data (sec)->this_hdr.contents = contents; | |
252b5132 | 2290 | } |
252b5132 RH |
2291 | } |
2292 | ||
6cdc0ccc AM |
2293 | if (internal_relocs != NULL |
2294 | && elf_section_data (sec)->relocs != internal_relocs) | |
2295 | free (internal_relocs); | |
2296 | ||
252b5132 RH |
2297 | return true; |
2298 | ||
2299 | error_return: | |
6cdc0ccc AM |
2300 | if (isymbuf != NULL |
2301 | && symtab_hdr->contents != (unsigned char *) isymbuf) | |
2302 | free (isymbuf); | |
2303 | if (contents != NULL | |
2304 | && elf_section_data (section)->this_hdr.contents != contents) | |
2305 | free (contents); | |
2306 | if (internal_relocs != NULL | |
2307 | && elf_section_data (section)->relocs != internal_relocs) | |
2308 | free (internal_relocs); | |
9ad5cbcf | 2309 | |
252b5132 RH |
2310 | return false; |
2311 | } | |
2312 | ||
2313 | /* Compute the stack size and movm arguments for the function | |
2314 | referred to by HASH at address ADDR in section with | |
2315 | contents CONTENTS, store the information in the hash table. */ | |
2316 | static void | |
2317 | compute_function_info (abfd, hash, addr, contents) | |
2318 | bfd *abfd; | |
2319 | struct elf32_mn10300_link_hash_entry *hash; | |
2320 | bfd_vma addr; | |
2321 | unsigned char *contents; | |
2322 | { | |
2323 | unsigned char byte1, byte2; | |
2324 | /* We only care about a very small subset of the possible prologue | |
2325 | sequences here. Basically we look for: | |
2326 | ||
2327 | movm [d2,d3,a2,a3],sp (optional) | |
2328 | add <size>,sp (optional, and only for sizes which fit in an unsigned | |
2329 | 8 bit number) | |
2330 | ||
2331 | If we find anything else, we quit. */ | |
2332 | ||
2333 | /* Look for movm [regs],sp */ | |
2334 | byte1 = bfd_get_8 (abfd, contents + addr); | |
2335 | byte2 = bfd_get_8 (abfd, contents + addr + 1); | |
2336 | ||
2337 | if (byte1 == 0xcf) | |
2338 | { | |
2339 | hash->movm_args = byte2; | |
2340 | addr += 2; | |
2341 | byte1 = bfd_get_8 (abfd, contents + addr); | |
2342 | byte2 = bfd_get_8 (abfd, contents + addr + 1); | |
2343 | } | |
2344 | ||
2345 | /* Now figure out how much stack space will be allocated by the movm | |
2346 | instruction. We need this kept separate from the funtion's normal | |
2347 | stack space. */ | |
2348 | if (hash->movm_args) | |
2349 | { | |
2350 | /* Space for d2. */ | |
2351 | if (hash->movm_args & 0x80) | |
2352 | hash->movm_stack_size += 4; | |
2353 | ||
2354 | /* Space for d3. */ | |
2355 | if (hash->movm_args & 0x40) | |
2356 | hash->movm_stack_size += 4; | |
2357 | ||
2358 | /* Space for a2. */ | |
2359 | if (hash->movm_args & 0x20) | |
2360 | hash->movm_stack_size += 4; | |
2361 | ||
2362 | /* Space for a3. */ | |
2363 | if (hash->movm_args & 0x10) | |
2364 | hash->movm_stack_size += 4; | |
2365 | ||
2366 | /* "other" space. d0, d1, a0, a1, mdr, lir, lar, 4 byte pad. */ | |
2367 | if (hash->movm_args & 0x08) | |
2368 | hash->movm_stack_size += 8 * 4; | |
2369 | ||
31f8dc8f JL |
2370 | if (bfd_get_mach (abfd) == bfd_mach_am33) |
2371 | { | |
2372 | /* "exother" space. e0, e1, mdrq, mcrh, mcrl, mcvf */ | |
2373 | if (hash->movm_args & 0x1) | |
2374 | hash->movm_stack_size += 6 * 4; | |
2375 | ||
2376 | /* exreg1 space. e4, e5, e6, e7 */ | |
2377 | if (hash->movm_args & 0x2) | |
2378 | hash->movm_stack_size += 4 * 4; | |
2379 | ||
2380 | /* exreg0 space. e2, e3 */ | |
2381 | if (hash->movm_args & 0x4) | |
2382 | hash->movm_stack_size += 2 * 4; | |
2383 | } | |
252b5132 RH |
2384 | } |
2385 | ||
2386 | /* Now look for the two stack adjustment variants. */ | |
2387 | if (byte1 == 0xf8 && byte2 == 0xfe) | |
2388 | { | |
2389 | int temp = bfd_get_8 (abfd, contents + addr + 2); | |
2390 | temp = ((temp & 0xff) ^ (~0x7f)) + 0x80; | |
2391 | ||
2392 | hash->stack_size = -temp; | |
2393 | } | |
2394 | else if (byte1 == 0xfa && byte2 == 0xfe) | |
2395 | { | |
2396 | int temp = bfd_get_16 (abfd, contents + addr + 2); | |
2397 | temp = ((temp & 0xffff) ^ (~0x7fff)) + 0x8000; | |
2398 | temp = -temp; | |
2399 | ||
2400 | if (temp < 255) | |
2401 | hash->stack_size = temp; | |
2402 | } | |
2403 | ||
2404 | /* If the total stack to be allocated by the call instruction is more | |
2405 | than 255 bytes, then we can't remove the stack adjustment by using | |
2406 | "call" (we might still be able to remove the "movm" instruction. */ | |
2407 | if (hash->stack_size + hash->movm_stack_size > 255) | |
2408 | hash->stack_size = 0; | |
2409 | ||
2410 | return; | |
2411 | } | |
2412 | ||
2413 | /* Delete some bytes from a section while relaxing. */ | |
2414 | ||
2415 | static boolean | |
2416 | mn10300_elf_relax_delete_bytes (abfd, sec, addr, count) | |
2417 | bfd *abfd; | |
2418 | asection *sec; | |
2419 | bfd_vma addr; | |
2420 | int count; | |
2421 | { | |
2422 | Elf_Internal_Shdr *symtab_hdr; | |
9ad5cbcf | 2423 | unsigned int sec_shndx; |
252b5132 RH |
2424 | bfd_byte *contents; |
2425 | Elf_Internal_Rela *irel, *irelend; | |
2426 | Elf_Internal_Rela *irelalign; | |
2427 | bfd_vma toaddr; | |
6cdc0ccc | 2428 | Elf_Internal_Sym *isym, *isymend; |
9ad5cbcf AM |
2429 | struct elf_link_hash_entry **sym_hashes; |
2430 | struct elf_link_hash_entry **end_hashes; | |
2431 | unsigned int symcount; | |
252b5132 | 2432 | |
9ad5cbcf | 2433 | sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); |
252b5132 RH |
2434 | |
2435 | contents = elf_section_data (sec)->this_hdr.contents; | |
2436 | ||
2437 | /* The deletion must stop at the next ALIGN reloc for an aligment | |
2438 | power larger than the number of bytes we are deleting. */ | |
2439 | ||
2440 | irelalign = NULL; | |
2441 | toaddr = sec->_cooked_size; | |
2442 | ||
2443 | irel = elf_section_data (sec)->relocs; | |
2444 | irelend = irel + sec->reloc_count; | |
2445 | ||
2446 | /* Actually delete the bytes. */ | |
dc810e39 AM |
2447 | memmove (contents + addr, contents + addr + count, |
2448 | (size_t) (toaddr - addr - count)); | |
252b5132 RH |
2449 | sec->_cooked_size -= count; |
2450 | ||
2451 | /* Adjust all the relocs. */ | |
2452 | for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++) | |
2453 | { | |
2454 | /* Get the new reloc address. */ | |
2455 | if ((irel->r_offset > addr | |
2456 | && irel->r_offset < toaddr)) | |
2457 | irel->r_offset -= count; | |
2458 | } | |
2459 | ||
2460 | /* Adjust the local symbols defined in this section. */ | |
6cdc0ccc AM |
2461 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
2462 | isym = (Elf_Internal_Sym *) symtab_hdr->contents; | |
2463 | for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++) | |
252b5132 | 2464 | { |
6cdc0ccc AM |
2465 | if (isym->st_shndx == sec_shndx |
2466 | && isym->st_value > addr | |
2467 | && isym->st_value < toaddr) | |
2468 | isym->st_value -= count; | |
252b5132 RH |
2469 | } |
2470 | ||
2471 | /* Now adjust the global symbols defined in this section. */ | |
9ad5cbcf AM |
2472 | symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) |
2473 | - symtab_hdr->sh_info); | |
2474 | sym_hashes = elf_sym_hashes (abfd); | |
2475 | end_hashes = sym_hashes + symcount; | |
2476 | for (; sym_hashes < end_hashes; sym_hashes++) | |
252b5132 | 2477 | { |
9ad5cbcf AM |
2478 | struct elf_link_hash_entry *sym_hash = *sym_hashes; |
2479 | if ((sym_hash->root.type == bfd_link_hash_defined | |
2480 | || sym_hash->root.type == bfd_link_hash_defweak) | |
2481 | && sym_hash->root.u.def.section == sec | |
2482 | && sym_hash->root.u.def.value > addr | |
2483 | && sym_hash->root.u.def.value < toaddr) | |
252b5132 | 2484 | { |
9ad5cbcf | 2485 | sym_hash->root.u.def.value -= count; |
252b5132 RH |
2486 | } |
2487 | } | |
2488 | ||
2489 | return true; | |
2490 | } | |
2491 | ||
2492 | /* Return true if a symbol exists at the given address, else return | |
2493 | false. */ | |
2494 | static boolean | |
6cdc0ccc | 2495 | mn10300_elf_symbol_address_p (abfd, sec, isym, addr) |
252b5132 RH |
2496 | bfd *abfd; |
2497 | asection *sec; | |
6cdc0ccc | 2498 | Elf_Internal_Sym *isym; |
252b5132 RH |
2499 | bfd_vma addr; |
2500 | { | |
2501 | Elf_Internal_Shdr *symtab_hdr; | |
9ad5cbcf | 2502 | unsigned int sec_shndx; |
6cdc0ccc | 2503 | Elf_Internal_Sym *isymend; |
9ad5cbcf AM |
2504 | struct elf_link_hash_entry **sym_hashes; |
2505 | struct elf_link_hash_entry **end_hashes; | |
2506 | unsigned int symcount; | |
252b5132 | 2507 | |
9ad5cbcf | 2508 | sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); |
252b5132 RH |
2509 | |
2510 | /* Examine all the symbols. */ | |
9ad5cbcf | 2511 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
6cdc0ccc | 2512 | for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++) |
252b5132 | 2513 | { |
6cdc0ccc AM |
2514 | if (isym->st_shndx == sec_shndx |
2515 | && isym->st_value == addr) | |
252b5132 RH |
2516 | return true; |
2517 | } | |
2518 | ||
9ad5cbcf AM |
2519 | symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) |
2520 | - symtab_hdr->sh_info); | |
2521 | sym_hashes = elf_sym_hashes (abfd); | |
2522 | end_hashes = sym_hashes + symcount; | |
2523 | for (; sym_hashes < end_hashes; sym_hashes++) | |
252b5132 | 2524 | { |
9ad5cbcf AM |
2525 | struct elf_link_hash_entry *sym_hash = *sym_hashes; |
2526 | if ((sym_hash->root.type == bfd_link_hash_defined | |
2527 | || sym_hash->root.type == bfd_link_hash_defweak) | |
2528 | && sym_hash->root.u.def.section == sec | |
2529 | && sym_hash->root.u.def.value == addr) | |
252b5132 RH |
2530 | return true; |
2531 | } | |
9ad5cbcf | 2532 | |
252b5132 RH |
2533 | return false; |
2534 | } | |
2535 | ||
2536 | /* This is a version of bfd_generic_get_relocated_section_contents | |
2537 | which uses mn10300_elf_relocate_section. */ | |
2538 | ||
2539 | static bfd_byte * | |
2540 | mn10300_elf_get_relocated_section_contents (output_bfd, link_info, link_order, | |
2541 | data, relocateable, symbols) | |
2542 | bfd *output_bfd; | |
2543 | struct bfd_link_info *link_info; | |
2544 | struct bfd_link_order *link_order; | |
2545 | bfd_byte *data; | |
2546 | boolean relocateable; | |
2547 | asymbol **symbols; | |
2548 | { | |
2549 | Elf_Internal_Shdr *symtab_hdr; | |
2550 | asection *input_section = link_order->u.indirect.section; | |
2551 | bfd *input_bfd = input_section->owner; | |
2552 | asection **sections = NULL; | |
2553 | Elf_Internal_Rela *internal_relocs = NULL; | |
6cdc0ccc | 2554 | Elf_Internal_Sym *isymbuf = NULL; |
252b5132 RH |
2555 | |
2556 | /* We only need to handle the case of relaxing, or of having a | |
2557 | particular set of section contents, specially. */ | |
2558 | if (relocateable | |
2559 | || elf_section_data (input_section)->this_hdr.contents == NULL) | |
2560 | return bfd_generic_get_relocated_section_contents (output_bfd, link_info, | |
2561 | link_order, data, | |
2562 | relocateable, | |
2563 | symbols); | |
2564 | ||
2565 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
2566 | ||
2567 | memcpy (data, elf_section_data (input_section)->this_hdr.contents, | |
dc810e39 | 2568 | (size_t) input_section->_raw_size); |
252b5132 RH |
2569 | |
2570 | if ((input_section->flags & SEC_RELOC) != 0 | |
2571 | && input_section->reloc_count > 0) | |
2572 | { | |
252b5132 | 2573 | asection **secpp; |
6cdc0ccc | 2574 | Elf_Internal_Sym *isym, *isymend; |
9ad5cbcf | 2575 | bfd_size_type amt; |
252b5132 | 2576 | |
252b5132 RH |
2577 | internal_relocs = (_bfd_elf32_link_read_relocs |
2578 | (input_bfd, input_section, (PTR) NULL, | |
2579 | (Elf_Internal_Rela *) NULL, false)); | |
2580 | if (internal_relocs == NULL) | |
2581 | goto error_return; | |
2582 | ||
6cdc0ccc AM |
2583 | if (symtab_hdr->sh_info != 0) |
2584 | { | |
2585 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
2586 | if (isymbuf == NULL) | |
2587 | isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, | |
2588 | symtab_hdr->sh_info, 0, | |
2589 | NULL, NULL, NULL); | |
2590 | if (isymbuf == NULL) | |
2591 | goto error_return; | |
2592 | } | |
252b5132 | 2593 | |
9ad5cbcf AM |
2594 | amt = symtab_hdr->sh_info; |
2595 | amt *= sizeof (asection *); | |
2596 | sections = (asection **) bfd_malloc (amt); | |
2597 | if (sections == NULL && amt != 0) | |
252b5132 RH |
2598 | goto error_return; |
2599 | ||
6cdc0ccc AM |
2600 | isymend = isymbuf + symtab_hdr->sh_info; |
2601 | for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp) | |
252b5132 RH |
2602 | { |
2603 | asection *isec; | |
2604 | ||
6cdc0ccc | 2605 | if (isym->st_shndx == SHN_UNDEF) |
252b5132 | 2606 | isec = bfd_und_section_ptr; |
6cdc0ccc | 2607 | else if (isym->st_shndx == SHN_ABS) |
252b5132 | 2608 | isec = bfd_abs_section_ptr; |
6cdc0ccc | 2609 | else if (isym->st_shndx == SHN_COMMON) |
252b5132 RH |
2610 | isec = bfd_com_section_ptr; |
2611 | else | |
6cdc0ccc | 2612 | isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx); |
252b5132 RH |
2613 | |
2614 | *secpp = isec; | |
2615 | } | |
2616 | ||
2617 | if (! mn10300_elf_relocate_section (output_bfd, link_info, input_bfd, | |
2618 | input_section, data, internal_relocs, | |
6cdc0ccc | 2619 | isymbuf, sections)) |
252b5132 RH |
2620 | goto error_return; |
2621 | ||
2622 | if (sections != NULL) | |
2623 | free (sections); | |
6cdc0ccc AM |
2624 | if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf) |
2625 | free (isymbuf); | |
252b5132 RH |
2626 | if (internal_relocs != elf_section_data (input_section)->relocs) |
2627 | free (internal_relocs); | |
252b5132 RH |
2628 | } |
2629 | ||
2630 | return data; | |
2631 | ||
2632 | error_return: | |
6cdc0ccc AM |
2633 | if (sections != NULL) |
2634 | free (sections); | |
2635 | if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf) | |
2636 | free (isymbuf); | |
252b5132 RH |
2637 | if (internal_relocs != NULL |
2638 | && internal_relocs != elf_section_data (input_section)->relocs) | |
2639 | free (internal_relocs); | |
252b5132 RH |
2640 | return NULL; |
2641 | } | |
2642 | ||
2643 | /* Assorted hash table functions. */ | |
2644 | ||
2645 | /* Initialize an entry in the link hash table. */ | |
2646 | ||
2647 | /* Create an entry in an MN10300 ELF linker hash table. */ | |
2648 | ||
2649 | static struct bfd_hash_entry * | |
2650 | elf32_mn10300_link_hash_newfunc (entry, table, string) | |
2651 | struct bfd_hash_entry *entry; | |
2652 | struct bfd_hash_table *table; | |
2653 | const char *string; | |
2654 | { | |
2655 | struct elf32_mn10300_link_hash_entry *ret = | |
2656 | (struct elf32_mn10300_link_hash_entry *) entry; | |
2657 | ||
2658 | /* Allocate the structure if it has not already been allocated by a | |
2659 | subclass. */ | |
2660 | if (ret == (struct elf32_mn10300_link_hash_entry *) NULL) | |
2661 | ret = ((struct elf32_mn10300_link_hash_entry *) | |
2662 | bfd_hash_allocate (table, | |
2663 | sizeof (struct elf32_mn10300_link_hash_entry))); | |
2664 | if (ret == (struct elf32_mn10300_link_hash_entry *) NULL) | |
2665 | return (struct bfd_hash_entry *) ret; | |
2666 | ||
2667 | /* Call the allocation method of the superclass. */ | |
2668 | ret = ((struct elf32_mn10300_link_hash_entry *) | |
2669 | _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, | |
2670 | table, string)); | |
2671 | if (ret != (struct elf32_mn10300_link_hash_entry *) NULL) | |
2672 | { | |
2673 | ret->direct_calls = 0; | |
2674 | ret->stack_size = 0; | |
2675 | ret->movm_stack_size = 0; | |
2676 | ret->flags = 0; | |
2677 | ret->movm_args = 0; | |
2678 | } | |
2679 | ||
2680 | return (struct bfd_hash_entry *) ret; | |
2681 | } | |
2682 | ||
2683 | /* Create an mn10300 ELF linker hash table. */ | |
2684 | ||
2685 | static struct bfd_link_hash_table * | |
2686 | elf32_mn10300_link_hash_table_create (abfd) | |
2687 | bfd *abfd; | |
2688 | { | |
2689 | struct elf32_mn10300_link_hash_table *ret; | |
dc810e39 | 2690 | bfd_size_type amt = sizeof (struct elf32_mn10300_link_hash_table); |
252b5132 | 2691 | |
e2d34d7d | 2692 | ret = (struct elf32_mn10300_link_hash_table *) bfd_malloc (amt); |
252b5132 RH |
2693 | if (ret == (struct elf32_mn10300_link_hash_table *) NULL) |
2694 | return NULL; | |
2695 | ||
2696 | if (! _bfd_elf_link_hash_table_init (&ret->root, abfd, | |
2697 | elf32_mn10300_link_hash_newfunc)) | |
2698 | { | |
e2d34d7d | 2699 | free (ret); |
252b5132 RH |
2700 | return NULL; |
2701 | } | |
2702 | ||
2703 | ret->flags = 0; | |
dc810e39 | 2704 | amt = sizeof (struct elf_link_hash_table); |
252b5132 | 2705 | ret->static_hash_table |
e2d34d7d | 2706 | = (struct elf32_mn10300_link_hash_table *) bfd_malloc (amt); |
252b5132 RH |
2707 | if (ret->static_hash_table == NULL) |
2708 | { | |
e2d34d7d | 2709 | free (ret); |
252b5132 RH |
2710 | return NULL; |
2711 | } | |
2712 | ||
2713 | if (! _bfd_elf_link_hash_table_init (&ret->static_hash_table->root, abfd, | |
2714 | elf32_mn10300_link_hash_newfunc)) | |
2715 | { | |
e2d34d7d DJ |
2716 | free (ret->static_hash_table); |
2717 | free (ret); | |
252b5132 RH |
2718 | return NULL; |
2719 | } | |
2720 | return &ret->root.root; | |
2721 | } | |
2722 | ||
e2d34d7d DJ |
2723 | /* Free an mn10300 ELF linker hash table. */ |
2724 | ||
2725 | static void | |
2726 | elf32_mn10300_link_hash_table_free (hash) | |
2727 | struct bfd_link_hash_table *hash; | |
2728 | { | |
2729 | struct elf32_mn10300_link_hash_table *ret | |
2730 | = (struct elf32_mn10300_link_hash_table *) hash; | |
2731 | ||
2732 | _bfd_generic_link_hash_table_free | |
2733 | ((struct bfd_link_hash_table *) ret->static_hash_table); | |
2734 | _bfd_generic_link_hash_table_free | |
2735 | ((struct bfd_link_hash_table *) ret); | |
2736 | } | |
2737 | ||
dc810e39 | 2738 | static unsigned long |
252b5132 RH |
2739 | elf_mn10300_mach (flags) |
2740 | flagword flags; | |
2741 | { | |
2742 | switch (flags & EF_MN10300_MACH) | |
2743 | { | |
010ac81f KH |
2744 | case E_MN10300_MACH_MN10300: |
2745 | default: | |
2746 | return bfd_mach_mn10300; | |
252b5132 | 2747 | |
010ac81f KH |
2748 | case E_MN10300_MACH_AM33: |
2749 | return bfd_mach_am33; | |
252b5132 RH |
2750 | } |
2751 | } | |
2752 | ||
2753 | /* The final processing done just before writing out a MN10300 ELF object | |
2754 | file. This gets the MN10300 architecture right based on the machine | |
2755 | number. */ | |
2756 | ||
252b5132 RH |
2757 | void |
2758 | _bfd_mn10300_elf_final_write_processing (abfd, linker) | |
2759 | bfd *abfd; | |
5f771d47 | 2760 | boolean linker ATTRIBUTE_UNUSED; |
252b5132 RH |
2761 | { |
2762 | unsigned long val; | |
252b5132 RH |
2763 | |
2764 | switch (bfd_get_mach (abfd)) | |
2765 | { | |
010ac81f KH |
2766 | default: |
2767 | case bfd_mach_mn10300: | |
2768 | val = E_MN10300_MACH_MN10300; | |
2769 | break; | |
2770 | ||
2771 | case bfd_mach_am33: | |
2772 | val = E_MN10300_MACH_AM33; | |
2773 | break; | |
252b5132 RH |
2774 | } |
2775 | ||
2776 | elf_elfheader (abfd)->e_flags &= ~ (EF_MN10300_MACH); | |
2777 | elf_elfheader (abfd)->e_flags |= val; | |
2778 | } | |
2779 | ||
2780 | boolean | |
2781 | _bfd_mn10300_elf_object_p (abfd) | |
2782 | bfd *abfd; | |
2783 | { | |
2784 | bfd_default_set_arch_mach (abfd, bfd_arch_mn10300, | |
010ac81f | 2785 | elf_mn10300_mach (elf_elfheader (abfd)->e_flags)); |
252b5132 RH |
2786 | return true; |
2787 | } | |
2788 | ||
2789 | /* Merge backend specific data from an object file to the output | |
2790 | object file when linking. */ | |
2791 | ||
2792 | boolean | |
2793 | _bfd_mn10300_elf_merge_private_bfd_data (ibfd, obfd) | |
2794 | bfd *ibfd; | |
2795 | bfd *obfd; | |
2796 | { | |
2797 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
2798 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
2799 | return true; | |
2800 | ||
2801 | if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) | |
2802 | && bfd_get_mach (obfd) < bfd_get_mach (ibfd)) | |
2803 | { | |
2804 | if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), | |
2805 | bfd_get_mach (ibfd))) | |
2806 | return false; | |
2807 | } | |
2808 | ||
2809 | return true; | |
2810 | } | |
2811 | ||
252b5132 RH |
2812 | #define TARGET_LITTLE_SYM bfd_elf32_mn10300_vec |
2813 | #define TARGET_LITTLE_NAME "elf32-mn10300" | |
2814 | #define ELF_ARCH bfd_arch_mn10300 | |
6f4514dc AO |
2815 | #define ELF_MACHINE_CODE EM_MN10300 |
2816 | #define ELF_MACHINE_ALT1 EM_CYGNUS_MN10300 | |
252b5132 RH |
2817 | #define ELF_MAXPAGESIZE 0x1000 |
2818 | ||
2819 | #define elf_info_to_howto mn10300_info_to_howto | |
2820 | #define elf_info_to_howto_rel 0 | |
2821 | #define elf_backend_can_gc_sections 1 | |
b491616a | 2822 | #define elf_backend_rela_normal 1 |
252b5132 RH |
2823 | #define elf_backend_check_relocs mn10300_elf_check_relocs |
2824 | #define elf_backend_gc_mark_hook mn10300_elf_gc_mark_hook | |
2825 | #define elf_backend_relocate_section mn10300_elf_relocate_section | |
2826 | #define bfd_elf32_bfd_relax_section mn10300_elf_relax_section | |
2827 | #define bfd_elf32_bfd_get_relocated_section_contents \ | |
2828 | mn10300_elf_get_relocated_section_contents | |
2829 | #define bfd_elf32_bfd_link_hash_table_create \ | |
2830 | elf32_mn10300_link_hash_table_create | |
e2d34d7d DJ |
2831 | #define bfd_elf32_bfd_link_hash_table_free \ |
2832 | elf32_mn10300_link_hash_table_free | |
252b5132 RH |
2833 | |
2834 | #define elf_symbol_leading_char '_' | |
2835 | ||
2836 | /* So we can set bits in e_flags. */ | |
2837 | #define elf_backend_final_write_processing \ | |
2838 | _bfd_mn10300_elf_final_write_processing | |
2839 | #define elf_backend_object_p _bfd_mn10300_elf_object_p | |
2840 | ||
2841 | #define bfd_elf32_bfd_merge_private_bfd_data \ | |
2842 | _bfd_mn10300_elf_merge_private_bfd_data | |
2843 | ||
252b5132 | 2844 | #include "elf32-target.h" |