Commit | Line | Data |
---|---|---|
3f8107ab | 1 | /* ft32-specific support for 32-bit ELF. |
b3adc24a | 2 | Copyright (C) 2013-2020 Free Software Foundation, Inc. |
3f8107ab AM |
3 | |
4 | Copied from elf32-moxie.c which is.. | |
b3adc24a | 5 | Copyright (C) 2009-2020 Free Software Foundation, Inc. |
3f8107ab AM |
6 | Free Software Foundation, Inc. |
7 | ||
8 | This file is part of BFD, the Binary File Descriptor library. | |
9 | ||
10 | This program is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 3 of the License, or | |
13 | (at your option) any later version. | |
14 | ||
15 | This program is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
21 | along with this program; if not, write to the Free Software | |
22 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
23 | MA 02110-1301, USA. */ | |
24 | ||
25 | #include "sysdep.h" | |
26 | #include "bfd.h" | |
27 | #include "libbfd.h" | |
28 | #include "elf-bfd.h" | |
29 | #include "elf/ft32.h" | |
81b42bca | 30 | #include "opcode/ft32.h" |
3f8107ab | 31 | |
81b42bca JB |
32 | static bfd_boolean debug_relax = FALSE; |
33 | ||
34 | static bfd_reloc_status_type | |
35 | bfd_elf_ft32_diff_reloc (bfd *, arelent *, asymbol *, void *, | |
36 | asection *, bfd *, char **); | |
3f8107ab AM |
37 | |
38 | static reloc_howto_type ft32_elf_howto_table [] = | |
39 | { | |
40 | /* This reloc does nothing. */ | |
41 | HOWTO (R_FT32_NONE, /* type */ | |
42 | 0, /* rightshift */ | |
43 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
44 | 32, /* bitsize */ | |
45 | FALSE, /* pc_relative */ | |
46 | 0, /* bitpos */ | |
47 | complain_overflow_bitfield, /* complain_on_overflow */ | |
48 | bfd_elf_generic_reloc, /* special_function */ | |
49 | "R_FT32_NONE", /* name */ | |
50 | FALSE, /* partial_inplace */ | |
51 | 0, /* src_mask */ | |
52 | 0, /* dst_mask */ | |
53 | FALSE), /* pcrel_offset */ | |
54 | ||
55 | /* A 32 bit absolute relocation. */ | |
56 | ||
57 | HOWTO (R_FT32_32, /* type */ | |
58 | 0, /* rightshift */ | |
59 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
60 | 32, /* bitsize */ | |
61 | FALSE, /* pc_relative */ | |
62 | 0, /* bitpos */ | |
63 | complain_overflow_bitfield, /* complain_on_overflow */ | |
64 | bfd_elf_generic_reloc, /* special_function */ | |
65 | "R_FT32_32", /* name */ | |
66 | FALSE, /* partial_inplace */ | |
67 | 0x00000000, /* src_mask */ | |
68 | 0xffffffff, /* dst_mask */ | |
69 | FALSE), /* pcrel_offset */ | |
70 | ||
71 | HOWTO (R_FT32_16, /* type */ | |
72 | 0, /* rightshift */ | |
73 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
74 | 16, /* bitsize */ | |
75 | FALSE, /* pc_relative */ | |
76 | 0, /* bitpos */ | |
81b42bca | 77 | complain_overflow_dont, /* complain_on_overflow */ |
3f8107ab AM |
78 | bfd_elf_generic_reloc, /* special_function */ |
79 | "R_FT32_16", /* name */ | |
80 | FALSE, /* partial_inplace */ | |
81 | 0x00000000, /* src_mask */ | |
82 | 0x0000ffff, /* dst_mask */ | |
83 | FALSE), /* pcrel_offset */ | |
84 | ||
85 | HOWTO (R_FT32_8, /* type */ | |
86 | 0, /* rightshift */ | |
87 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
88 | 8, /* bitsize */ | |
89 | FALSE, /* pc_relative */ | |
90 | 0, /* bitpos */ | |
91 | complain_overflow_signed, /* complain_on_overflow */ | |
92 | bfd_elf_generic_reloc, /* special_function */ | |
93 | "R_FT32_8", /* name */ | |
94 | FALSE, /* partial_inplace */ | |
95 | 0x00000000, /* src_mask */ | |
96 | 0x000000ff, /* dst_mask */ | |
97 | FALSE), /* pcrel_offset */ | |
98 | ||
99 | HOWTO (R_FT32_10, /* type */ | |
100 | 0, /* rightshift */ | |
101 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
102 | 10, /* bitsize */ | |
103 | FALSE, /* pc_relative */ | |
104 | 4, /* bitpos */ | |
81b42bca | 105 | complain_overflow_bitfield, /* complain_on_overflow */ |
3f8107ab AM |
106 | bfd_elf_generic_reloc, /* special_function */ |
107 | "R_FT32_10", /* name */ | |
108 | FALSE, /* partial_inplace */ | |
109 | 0x00000000, /* src_mask */ | |
110 | 0x00003ff0, /* dst_mask */ | |
111 | FALSE), /* pcrel_offset */ | |
112 | ||
113 | HOWTO (R_FT32_20, /* type */ | |
114 | 0, /* rightshift */ | |
115 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
116 | 20, /* bitsize */ | |
117 | FALSE, /* pc_relative */ | |
118 | 0, /* bitpos */ | |
119 | complain_overflow_dont, /* complain_on_overflow */ | |
120 | bfd_elf_generic_reloc, /* special_function */ | |
121 | "R_FT32_20", /* name */ | |
122 | FALSE, /* partial_inplace */ | |
123 | 0x00000000, /* src_mask */ | |
124 | 0x000fffff, /* dst_mask */ | |
125 | FALSE), /* pcrel_offset */ | |
126 | ||
127 | HOWTO (R_FT32_17, /* type */ | |
128 | 0, /* rightshift */ | |
129 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
130 | 17, /* bitsize */ | |
131 | FALSE, /* pc_relative */ | |
132 | 0, /* bitpos */ | |
133 | complain_overflow_dont, /* complain_on_overflow */ | |
134 | bfd_elf_generic_reloc, /* special_function */ | |
135 | "R_FT32_17", /* name */ | |
136 | FALSE, /* partial_inplace */ | |
137 | 0x00000000, /* src_mask */ | |
138 | 0x0001ffff, /* dst_mask */ | |
139 | FALSE), /* pcrel_offset */ | |
140 | ||
141 | HOWTO (R_FT32_18, /* type */ | |
142 | 2, /* rightshift */ | |
143 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
144 | 18, /* bitsize */ | |
145 | FALSE, /* pc_relative */ | |
146 | 0, /* bitpos */ | |
ef32532f | 147 | complain_overflow_dont, /* complain_on_overflow */ |
3f8107ab AM |
148 | bfd_elf_generic_reloc, /* special_function */ |
149 | "R_FT32_18", /* name */ | |
81b42bca | 150 | FALSE, /* partial_inplace */ |
3f8107ab AM |
151 | 0x00000000, /* src_mask */ |
152 | 0x0003ffff, /* dst_mask */ | |
153 | FALSE), /* pcrel_offset */ | |
154 | ||
81b42bca JB |
155 | HOWTO (R_FT32_RELAX, /* type */ |
156 | 0, /* rightshift */ | |
157 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
158 | 10, /* bitsize */ | |
159 | FALSE, /* pc_relative */ | |
160 | 4, /* bitpos */ | |
161 | complain_overflow_signed, /* complain_on_overflow */ | |
162 | bfd_elf_generic_reloc, /* special_function */ | |
163 | "R_FT32_RELAX", /* name */ | |
164 | FALSE, /* partial_inplace */ | |
165 | 0x00000000, /* src_mask */ | |
166 | 0x00000000, /* dst_mask */ | |
167 | FALSE), /* pcrel_offset */ | |
168 | ||
169 | HOWTO (R_FT32_SC0, /* type */ | |
170 | 0, /* rightshift */ | |
171 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
172 | 10, /* bitsize */ | |
173 | FALSE, /* pc_relative */ | |
174 | 4, /* bitpos */ | |
175 | complain_overflow_signed, /* complain_on_overflow */ | |
176 | bfd_elf_generic_reloc, /* special_function */ | |
07d6d2b8 | 177 | "R_FT32_SC0", /* name */ |
81b42bca JB |
178 | FALSE, /* partial_inplace */ |
179 | 0x00000000, /* src_mask */ | |
180 | 0x00000000, /* dst_mask */ | |
181 | FALSE), /* pcrel_offset */ | |
182 | HOWTO (R_FT32_SC1, /* type */ | |
183 | 2, /* rightshift */ | |
184 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
185 | 22, /* bitsize */ | |
186 | TRUE, /* pc_relative */ | |
187 | 7, /* bitpos */ | |
188 | complain_overflow_dont, /* complain_on_overflow */ | |
189 | bfd_elf_generic_reloc, /* special_function */ | |
07d6d2b8 | 190 | "R_FT32_SC1", /* name */ |
81b42bca JB |
191 | TRUE, /* partial_inplace */ |
192 | 0x07ffff80, /* src_mask */ | |
193 | 0x07ffff80, /* dst_mask */ | |
194 | FALSE), /* pcrel_offset */ | |
3b4b0a62 JB |
195 | HOWTO (R_FT32_15, /* type */ |
196 | 0, /* rightshift */ | |
197 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
198 | 15, /* bitsize */ | |
199 | FALSE, /* pc_relative */ | |
200 | 0, /* bitpos */ | |
201 | complain_overflow_dont, /* complain_on_overflow */ | |
202 | bfd_elf_generic_reloc, /* special_function */ | |
203 | "R_FT32_15", /* name */ | |
204 | FALSE, /* partial_inplace */ | |
205 | 0x00000000, /* src_mask */ | |
206 | 0x00007fff, /* dst_mask */ | |
207 | FALSE), /* pcrel_offset */ | |
07d6d2b8 AM |
208 | HOWTO (R_FT32_DIFF32, /* type */ |
209 | 0, /* rightshift */ | |
210 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
211 | 32, /* bitsize */ | |
212 | FALSE, /* pc_relative */ | |
213 | 0, /* bitpos */ | |
81b42bca JB |
214 | complain_overflow_dont, /* complain_on_overflow */ |
215 | bfd_elf_ft32_diff_reloc, /* special_function */ | |
07d6d2b8 AM |
216 | "R_FT32_DIFF32", /* name */ |
217 | FALSE, /* partial_inplace */ | |
218 | 0, /* src_mask */ | |
219 | 0xffffffff, /* dst_mask */ | |
220 | FALSE), /* pcrel_offset */ | |
3f8107ab AM |
221 | }; |
222 | \f | |
81b42bca | 223 | \f |
3f8107ab AM |
224 | /* Map BFD reloc types to FT32 ELF reloc types. */ |
225 | ||
226 | struct ft32_reloc_map | |
227 | { | |
228 | bfd_reloc_code_real_type bfd_reloc_val; | |
229 | unsigned int ft32_reloc_val; | |
230 | }; | |
231 | ||
232 | static const struct ft32_reloc_map ft32_reloc_map [] = | |
233 | { | |
07d6d2b8 AM |
234 | { BFD_RELOC_NONE, R_FT32_NONE }, |
235 | { BFD_RELOC_32, R_FT32_32 }, | |
236 | { BFD_RELOC_16, R_FT32_16 }, | |
237 | { BFD_RELOC_8, R_FT32_8 }, | |
238 | { BFD_RELOC_FT32_10, R_FT32_10 }, | |
239 | { BFD_RELOC_FT32_20, R_FT32_20 }, | |
240 | { BFD_RELOC_FT32_17, R_FT32_17 }, | |
241 | { BFD_RELOC_FT32_18, R_FT32_18 }, | |
242 | { BFD_RELOC_FT32_RELAX, R_FT32_RELAX }, | |
243 | { BFD_RELOC_FT32_SC0, R_FT32_SC0 }, | |
244 | { BFD_RELOC_FT32_SC1, R_FT32_SC1 }, | |
245 | { BFD_RELOC_FT32_15, R_FT32_15 }, | |
246 | { BFD_RELOC_FT32_DIFF32, R_FT32_DIFF32 }, | |
3f8107ab AM |
247 | }; |
248 | ||
81b42bca JB |
249 | /* Perform a diff relocation. Nothing to do, as the difference value is |
250 | already written into the section's contents. */ | |
251 | ||
252 | static bfd_reloc_status_type | |
253 | bfd_elf_ft32_diff_reloc (bfd *abfd ATTRIBUTE_UNUSED, | |
254 | arelent *reloc_entry ATTRIBUTE_UNUSED, | |
255 | asymbol *symbol ATTRIBUTE_UNUSED, | |
256 | void *data ATTRIBUTE_UNUSED, | |
257 | asection *input_section ATTRIBUTE_UNUSED, | |
258 | bfd *output_bfd ATTRIBUTE_UNUSED, | |
259 | char **error_message ATTRIBUTE_UNUSED) | |
260 | { | |
261 | return bfd_reloc_ok; | |
262 | } | |
263 | ||
3f8107ab AM |
264 | static reloc_howto_type * |
265 | ft32_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
266 | bfd_reloc_code_real_type code) | |
267 | { | |
268 | unsigned int i; | |
269 | ||
270 | for (i = sizeof (ft32_reloc_map) / sizeof (ft32_reloc_map[0]); | |
271 | --i;) | |
272 | if (ft32_reloc_map [i].bfd_reloc_val == code) | |
273 | return & ft32_elf_howto_table [ft32_reloc_map[i].ft32_reloc_val]; | |
274 | ||
275 | return NULL; | |
276 | } | |
277 | ||
278 | static reloc_howto_type * | |
279 | ft32_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name) | |
280 | { | |
281 | unsigned int i; | |
282 | ||
283 | for (i = 0; | |
284 | i < sizeof (ft32_elf_howto_table) / sizeof (ft32_elf_howto_table[0]); | |
285 | i++) | |
286 | if (ft32_elf_howto_table[i].name != NULL | |
287 | && strcasecmp (ft32_elf_howto_table[i].name, r_name) == 0) | |
288 | return &ft32_elf_howto_table[i]; | |
289 | ||
290 | return NULL; | |
291 | } | |
292 | ||
293 | /* Set the howto pointer for an FT32 ELF reloc. */ | |
294 | ||
f3185997 NC |
295 | static bfd_boolean |
296 | ft32_info_to_howto_rela (bfd *abfd, | |
3f8107ab AM |
297 | arelent *cache_ptr, |
298 | Elf_Internal_Rela *dst) | |
299 | { | |
300 | unsigned int r_type; | |
301 | ||
302 | r_type = ELF32_R_TYPE (dst->r_info); | |
5224fa03 | 303 | if (r_type >= (unsigned int) R_FT32_max) |
f3185997 NC |
304 | { |
305 | /* xgettext:c-format */ | |
306 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), | |
307 | abfd, r_type); | |
308 | bfd_set_error (bfd_error_bad_value); | |
309 | return FALSE; | |
310 | } | |
311 | ||
3f8107ab | 312 | cache_ptr->howto = & ft32_elf_howto_table [r_type]; |
f3185997 | 313 | return cache_ptr->howto != NULL; |
3f8107ab | 314 | } |
81b42bca | 315 | |
3f8107ab AM |
316 | /* Relocate an FT32 ELF section. |
317 | ||
318 | The RELOCATE_SECTION function is called by the new ELF backend linker | |
319 | to handle the relocations for a section. | |
320 | ||
321 | The relocs are always passed as Rela structures; if the section | |
322 | actually uses Rel structures, the r_addend field will always be | |
323 | zero. | |
324 | ||
325 | This function is responsible for adjusting the section contents as | |
326 | necessary, and (if using Rela relocs and generating a relocatable | |
327 | output file) adjusting the reloc addend as necessary. | |
328 | ||
329 | This function does not have to worry about setting the reloc | |
330 | address or the reloc symbol index. | |
331 | ||
332 | LOCAL_SYMS is a pointer to the swapped in local symbols. | |
333 | ||
334 | LOCAL_SECTIONS is an array giving the section in the input file | |
335 | corresponding to the st_shndx field of each local symbol. | |
336 | ||
337 | The global hash table entry for the global symbols can be found | |
338 | via elf_sym_hashes (input_bfd). | |
339 | ||
340 | When generating relocatable output, this function must handle | |
341 | STB_LOCAL/STT_SECTION symbols specially. The output symbol is | |
342 | going to be the section symbol corresponding to the output | |
343 | section, which means that the addend must be adjusted | |
344 | accordingly. */ | |
345 | ||
346 | static bfd_boolean | |
347 | ft32_elf_relocate_section (bfd *output_bfd, | |
348 | struct bfd_link_info *info, | |
349 | bfd *input_bfd, | |
350 | asection *input_section, | |
351 | bfd_byte *contents, | |
352 | Elf_Internal_Rela *relocs, | |
353 | Elf_Internal_Sym *local_syms, | |
354 | asection **local_sections) | |
355 | { | |
356 | Elf_Internal_Shdr *symtab_hdr; | |
357 | struct elf_link_hash_entry **sym_hashes; | |
358 | Elf_Internal_Rela *rel; | |
359 | Elf_Internal_Rela *relend; | |
360 | ||
361 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; | |
362 | sym_hashes = elf_sym_hashes (input_bfd); | |
363 | relend = relocs + input_section->reloc_count; | |
364 | ||
365 | for (rel = relocs; rel < relend; rel ++) | |
366 | { | |
367 | reloc_howto_type *howto; | |
368 | unsigned long r_symndx; | |
369 | Elf_Internal_Sym *sym; | |
370 | asection *sec; | |
371 | struct elf_link_hash_entry *h; | |
372 | bfd_vma relocation; | |
373 | bfd_reloc_status_type r; | |
374 | const char *name; | |
375 | int r_type; | |
376 | ||
377 | r_type = ELF32_R_TYPE (rel->r_info); | |
378 | r_symndx = ELF32_R_SYM (rel->r_info); | |
379 | howto = ft32_elf_howto_table + r_type; | |
380 | h = NULL; | |
381 | sym = NULL; | |
382 | sec = NULL; | |
383 | ||
384 | if (r_symndx < symtab_hdr->sh_info) | |
385 | { | |
386 | sym = local_syms + r_symndx; | |
387 | sec = local_sections [r_symndx]; | |
388 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); | |
389 | ||
390 | name = bfd_elf_string_from_elf_section | |
391 | (input_bfd, symtab_hdr->sh_link, sym->st_name); | |
fd361982 | 392 | name = name == NULL ? bfd_section_name (sec) : name; |
3f8107ab AM |
393 | } |
394 | else | |
395 | { | |
396 | bfd_boolean unresolved_reloc, warned, ignored; | |
397 | ||
398 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, | |
399 | r_symndx, symtab_hdr, sym_hashes, | |
400 | h, sec, relocation, | |
401 | unresolved_reloc, warned, ignored); | |
402 | ||
403 | name = h->root.root.string; | |
404 | } | |
405 | ||
406 | if (sec != NULL && discarded_section (sec)) | |
407 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, | |
408 | rel, 1, relend, howto, 0, contents); | |
409 | ||
0e1862bb | 410 | if (bfd_link_relocatable (info)) |
3f8107ab AM |
411 | continue; |
412 | ||
81b42bca JB |
413 | switch (howto->type) |
414 | { | |
415 | case R_FT32_SC0: | |
416 | { | |
417 | unsigned int insn; | |
418 | int offset; | |
419 | unsigned int code15[2]; | |
420 | ||
421 | insn = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
422 | ft32_split_shortcode (insn, code15); | |
423 | ||
424 | offset = (int)relocation; | |
425 | offset += (int)(rel->r_addend - rel->r_offset); | |
426 | offset -= (input_section->output_section->vma + | |
427 | input_section->output_offset); | |
428 | if ((offset < -1024) || (offset >= 1024)) | |
429 | { | |
430 | r = bfd_reloc_outofrange; | |
431 | break; | |
432 | } | |
433 | code15[0] |= ((offset / 4) & 511); | |
434 | insn = ft32_merge_shortcode (code15); | |
435 | bfd_put_32 (input_bfd, insn, contents + rel->r_offset); | |
436 | } | |
437 | r = bfd_reloc_ok; | |
438 | break; | |
439 | ||
440 | case R_FT32_SC1: | |
441 | { | |
442 | unsigned int insn; | |
443 | int offset; | |
444 | unsigned int code15[2]; | |
445 | ||
446 | insn = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
447 | ft32_split_shortcode (insn, code15); | |
448 | ||
449 | offset = (int)relocation; | |
450 | offset += (int)(rel->r_addend - rel->r_offset); | |
451 | offset -= (input_section->output_section->vma + | |
452 | input_section->output_offset); | |
453 | if ((offset < -1024) || (offset >= 1024)) | |
454 | { | |
455 | r = bfd_reloc_outofrange; | |
456 | break; | |
457 | } | |
458 | code15[1] |= ((offset / 4) & 511); | |
459 | insn = ft32_merge_shortcode (code15); | |
460 | bfd_put_32 (input_bfd, insn, contents + rel->r_offset); | |
461 | } | |
462 | r = bfd_reloc_ok; | |
463 | break; | |
464 | ||
465 | case R_FT32_DIFF32: | |
466 | r = bfd_reloc_ok; | |
467 | break; | |
468 | ||
469 | default: | |
470 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
471 | contents, rel->r_offset, | |
472 | relocation, rel->r_addend); | |
473 | break; | |
474 | } | |
3f8107ab AM |
475 | |
476 | if (r != bfd_reloc_ok) | |
477 | { | |
478 | const char * msg = NULL; | |
479 | ||
480 | switch (r) | |
481 | { | |
482 | case bfd_reloc_overflow: | |
1a72702b | 483 | (*info->callbacks->reloc_overflow) |
3f8107ab AM |
484 | (info, (h ? &h->root : NULL), name, howto->name, |
485 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); | |
486 | break; | |
487 | ||
488 | case bfd_reloc_undefined: | |
1a72702b AM |
489 | (*info->callbacks->undefined_symbol) |
490 | (info, name, input_bfd, input_section, rel->r_offset, TRUE); | |
3f8107ab AM |
491 | break; |
492 | ||
493 | case bfd_reloc_outofrange: | |
494 | msg = _("internal error: out of range error"); | |
495 | break; | |
496 | ||
497 | case bfd_reloc_notsupported: | |
498 | msg = _("internal error: unsupported relocation error"); | |
499 | break; | |
500 | ||
501 | case bfd_reloc_dangerous: | |
502 | msg = _("internal error: dangerous relocation"); | |
503 | break; | |
504 | ||
505 | default: | |
506 | msg = _("internal error: unknown error"); | |
507 | break; | |
508 | } | |
509 | ||
510 | if (msg) | |
1a72702b AM |
511 | (*info->callbacks->warning) (info, msg, name, input_bfd, |
512 | input_section, rel->r_offset); | |
3f8107ab AM |
513 | } |
514 | } | |
515 | ||
516 | return TRUE; | |
517 | } | |
518 | \f | |
81b42bca JB |
519 | /* Relaxation. */ |
520 | ||
521 | static bfd_boolean | |
522 | ft32_reloc_shortable | |
07d6d2b8 AM |
523 | (bfd * abfd, |
524 | asection * sec, | |
525 | Elf_Internal_Sym * isymbuf ATTRIBUTE_UNUSED, | |
526 | bfd_byte * contents, | |
527 | bfd_vma pc ATTRIBUTE_UNUSED, | |
81b42bca | 528 | Elf_Internal_Rela * irel, |
07d6d2b8 | 529 | unsigned int * sc) |
81b42bca JB |
530 | { |
531 | Elf_Internal_Shdr *symtab_hdr ATTRIBUTE_UNUSED; | |
532 | bfd_vma symval; | |
533 | ||
534 | enum elf_ft32_reloc_type r_type; | |
535 | reloc_howto_type *howto = NULL; | |
536 | unsigned int insn; | |
537 | int offset; | |
538 | bfd_vma dot, value; | |
539 | ||
540 | r_type = ELF32_R_TYPE (irel->r_info); | |
541 | howto = &ft32_elf_howto_table [r_type]; | |
542 | ||
543 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
544 | ||
545 | /* Get the value of the symbol referred to by the reloc. */ | |
546 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) | |
547 | { | |
548 | /* A local symbol. */ | |
549 | Elf_Internal_Sym *isym; | |
550 | asection *sym_sec; | |
551 | ||
552 | isym = isymbuf + ELF32_R_SYM (irel->r_info); | |
553 | sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
554 | symval = isym->st_value; | |
555 | /* If the reloc is absolute, it will not have | |
556 | a symbol or section associated with it. */ | |
557 | if (sym_sec) | |
558 | symval += sym_sec->output_section->vma | |
559 | + sym_sec->output_offset; | |
560 | } | |
561 | else | |
562 | { | |
563 | unsigned long indx; | |
564 | struct elf_link_hash_entry *h; | |
565 | ||
566 | /* An external symbol. */ | |
567 | indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; | |
568 | h = elf_sym_hashes (abfd)[indx]; | |
569 | BFD_ASSERT (h != NULL); | |
570 | if (h->root.type != bfd_link_hash_defined | |
571 | && h->root.type != bfd_link_hash_defweak) | |
572 | /* This appears to be a reference to an undefined | |
573 | symbol. Just ignore it--it will be caught by the | |
574 | regular reloc processing. */ | |
575 | return FALSE; | |
576 | ||
577 | symval = (h->root.u.def.value | |
578 | + h->root.u.def.section->output_section->vma | |
579 | + h->root.u.def.section->output_offset); | |
580 | } | |
581 | ||
582 | switch (r_type) | |
583 | { | |
584 | case R_FT32_8: | |
585 | case R_FT32_10: | |
586 | case R_FT32_16: | |
587 | case R_FT32_20: | |
588 | case R_FT32_RELAX: | |
589 | if (symval != 0) | |
590 | return FALSE; | |
591 | insn = bfd_get_32 (abfd, contents + irel->r_offset); | |
592 | insn |= ((symval + irel->r_addend) << howto->bitpos) & howto->dst_mask; | |
593 | return ft32_shortcode (insn, sc); | |
594 | ||
595 | case R_FT32_18: | |
596 | insn = bfd_get_32 (abfd, contents + irel->r_offset); | |
597 | /* Get the address of this instruction. */ | |
598 | dot = (sec->output_section->vma | |
599 | + sec->output_offset + irel->r_offset); | |
600 | value = symval + irel->r_addend; | |
601 | offset = (value - dot) / 4; | |
602 | ||
603 | if ((dot > 0x8c) && (-256 <= offset) && (offset < 256)) | |
604 | { | |
605 | switch (insn) | |
606 | { | |
607 | case 0x00200000: *sc = (3 << 13) | (0 << 9); return TRUE; | |
608 | case 0x00280000: *sc = (3 << 13) | (1 << 9); return TRUE; | |
609 | case 0x00600000: *sc = (3 << 13) | (2 << 9); return TRUE; | |
610 | case 0x00680000: *sc = (3 << 13) | (3 << 9); return TRUE; | |
611 | case 0x00a00000: *sc = (3 << 13) | (4 << 9); return TRUE; | |
612 | case 0x00a80000: *sc = (3 << 13) | (5 << 9); return TRUE; | |
613 | case 0x00e00000: *sc = (3 << 13) | (6 << 9); return TRUE; | |
614 | case 0x00e80000: *sc = (3 << 13) | (7 << 9); return TRUE; | |
615 | case 0x01200000: *sc = (3 << 13) | (8 << 9); return TRUE; | |
616 | case 0x01280000: *sc = (3 << 13) | (9 << 9); return TRUE; | |
617 | case 0x01600000: *sc = (3 << 13) | (10 << 9); return TRUE; | |
618 | case 0x01680000: *sc = (3 << 13) | (11 << 9); return TRUE; | |
619 | case 0x01a00000: *sc = (3 << 13) | (12 << 9); return TRUE; | |
620 | case 0x01a80000: *sc = (3 << 13) | (13 << 9); return TRUE; | |
621 | ||
622 | case 0x00300000: *sc = (3 << 13) | (14 << 9); return TRUE; | |
623 | case 0x00340000: *sc = (3 << 13) | (15 << 9); return TRUE; | |
624 | ||
625 | default: | |
626 | break; | |
627 | } | |
628 | } | |
629 | break; | |
630 | ||
631 | default: | |
632 | break; | |
633 | } | |
634 | return FALSE; | |
635 | } | |
636 | ||
637 | /* Returns whether the relocation type passed is a diff reloc. */ | |
638 | ||
639 | static bfd_boolean | |
640 | elf32_ft32_is_diff_reloc (Elf_Internal_Rela *irel) | |
641 | { | |
642 | return (ELF32_R_TYPE (irel->r_info) == R_FT32_DIFF32); | |
643 | } | |
644 | ||
645 | /* Reduce the diff value written in the section by count if the shrinked | |
646 | insn address happens to fall between the two symbols for which this | |
647 | diff reloc was emitted. */ | |
648 | ||
649 | static bfd_boolean | |
650 | elf32_ft32_adjust_diff_reloc_value (bfd *abfd, | |
651 | struct bfd_section *isec, | |
652 | Elf_Internal_Rela *irel, | |
653 | bfd_vma symval, | |
654 | bfd_vma shrinked_insn_address, | |
655 | int count) | |
656 | { | |
657 | unsigned char * reloc_contents = NULL; | |
658 | unsigned char * isec_contents = elf_section_data (isec)->this_hdr.contents; | |
659 | bfd_signed_vma x = 0; | |
660 | bfd_vma sym2_address; | |
661 | bfd_vma sym1_address; | |
662 | bfd_vma start_address; | |
663 | bfd_vma end_address; | |
664 | ||
665 | ||
666 | if (isec_contents == NULL) | |
667 | { | |
668 | if (! bfd_malloc_and_get_section (abfd, isec, &isec_contents)) | |
669 | return FALSE; | |
670 | ||
671 | elf_section_data (isec)->this_hdr.contents = isec_contents; | |
672 | } | |
673 | ||
674 | reloc_contents = isec_contents + irel->r_offset; | |
675 | ||
676 | /* Read value written in object file. */ | |
677 | switch (ELF32_R_TYPE (irel->r_info)) | |
678 | { | |
679 | case R_FT32_DIFF32: | |
680 | x = bfd_get_signed_32 (abfd, reloc_contents); | |
681 | break; | |
682 | ||
683 | default: | |
684 | return FALSE; | |
685 | } | |
686 | ||
687 | /* For a diff reloc sym1 - sym2 the diff at assembly time (x) is written | |
688 | into the object file at the reloc offset. sym2's logical value is | |
689 | symval (<start_of_section>) + reloc addend. Compute the start and end | |
690 | addresses and check if the shrinked insn falls between sym1 and sym2. */ | |
691 | sym2_address = symval + irel->r_addend; | |
692 | sym1_address = sym2_address - x; | |
693 | ||
694 | /* Don't assume sym2 is bigger than sym1 - the difference | |
695 | could be negative. Compute start and end addresses, and | |
696 | use those to see if they span shrinked_insn_address. */ | |
697 | start_address = sym1_address < sym2_address ? sym1_address : sym2_address; | |
698 | end_address = sym1_address > sym2_address ? sym1_address : sym2_address; | |
699 | ||
700 | if (shrinked_insn_address >= start_address | |
701 | && shrinked_insn_address < end_address) | |
702 | { | |
703 | /* Reduce the diff value by count bytes and write it back into section | |
704 | contents. */ | |
705 | bfd_signed_vma new_diff = x < 0 ? x + count : x - count; | |
706 | ||
707 | if (sym2_address > shrinked_insn_address) | |
708 | irel->r_addend -= count; | |
709 | ||
710 | switch (ELF32_R_TYPE (irel->r_info)) | |
711 | { | |
712 | case R_FT32_DIFF32: | |
713 | bfd_put_signed_32 (abfd, new_diff & 0xFFFFFFFF, reloc_contents); | |
714 | break; | |
715 | ||
716 | default: | |
717 | return FALSE; | |
718 | } | |
719 | } | |
720 | ||
721 | return TRUE; | |
722 | } | |
723 | ||
724 | static bfd_boolean | |
725 | elf32_ft32_adjust_reloc_if_spans_insn (bfd *abfd, | |
726 | asection *isec, | |
727 | Elf_Internal_Rela *irel, bfd_vma symval, | |
728 | bfd_vma shrinked_insn_address, | |
729 | bfd_vma shrink_boundary, | |
730 | int count) | |
731 | { | |
732 | ||
733 | if (elf32_ft32_is_diff_reloc (irel)) | |
734 | { | |
735 | if (!elf32_ft32_adjust_diff_reloc_value (abfd, isec, irel, | |
07d6d2b8 AM |
736 | symval, |
737 | shrinked_insn_address, | |
738 | count)) | |
739 | return FALSE; | |
81b42bca JB |
740 | } |
741 | else | |
742 | { | |
743 | bfd_vma reloc_value = symval + irel->r_addend; | |
744 | bfd_boolean addend_within_shrink_boundary = | |
745 | (reloc_value <= shrink_boundary); | |
746 | bfd_boolean reloc_spans_insn = | |
747 | (symval <= shrinked_insn_address | |
748 | && reloc_value > shrinked_insn_address | |
749 | && addend_within_shrink_boundary); | |
750 | ||
751 | if (! reloc_spans_insn) | |
752 | return TRUE; | |
753 | ||
754 | irel->r_addend -= count; | |
755 | ||
756 | if (debug_relax) | |
757 | printf ("Relocation's addend needed to be fixed \n"); | |
758 | } | |
759 | return TRUE; | |
760 | } | |
761 | ||
762 | /* Delete some bytes from a section while relaxing. */ | |
763 | ||
764 | static bfd_boolean | |
765 | elf32_ft32_relax_delete_bytes (struct bfd_link_info *link_info, bfd * abfd, | |
766 | asection * sec, bfd_vma addr, int count) | |
767 | { | |
768 | Elf_Internal_Shdr *symtab_hdr; | |
769 | unsigned int sec_shndx; | |
770 | bfd_byte *contents; | |
771 | Elf_Internal_Rela *irel, *irelend; | |
772 | bfd_vma toaddr; | |
773 | Elf_Internal_Sym *isym; | |
774 | Elf_Internal_Sym *isymend; | |
775 | struct elf_link_hash_entry **sym_hashes; | |
776 | struct elf_link_hash_entry **end_hashes; | |
777 | struct elf_link_hash_entry **start_hashes; | |
778 | unsigned int symcount; | |
779 | Elf_Internal_Sym *isymbuf = NULL; | |
780 | ||
781 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
782 | sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); | |
783 | ||
784 | contents = elf_section_data (sec)->this_hdr.contents; | |
785 | ||
786 | toaddr = sec->size; | |
787 | ||
788 | irel = elf_section_data (sec)->relocs; | |
789 | irelend = irel + sec->reloc_count; | |
790 | ||
791 | /* Actually delete the bytes. */ | |
792 | memmove (contents + addr, contents + addr + count, | |
793 | (size_t) (toaddr - addr - count)); | |
794 | sec->size -= count; | |
795 | ||
796 | /* Adjust all the relocs. */ | |
797 | for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++) | |
798 | /* Get the new reloc address. */ | |
799 | if ((irel->r_offset > addr && irel->r_offset < toaddr)) | |
800 | irel->r_offset -= count; | |
801 | ||
802 | /* The reloc's own addresses are now ok. However, we need to readjust | |
803 | the reloc's addend, i.e. the reloc's value if two conditions are met: | |
804 | 1.) the reloc is relative to a symbol in this section that | |
805 | is located in front of the shrinked instruction | |
806 | 2.) symbol plus addend end up behind the shrinked instruction. | |
807 | ||
808 | The most common case where this happens are relocs relative to | |
809 | the section-start symbol. | |
810 | ||
811 | This step needs to be done for all of the sections of the bfd. */ | |
812 | { | |
813 | struct bfd_section *isec; | |
814 | ||
815 | for (isec = abfd->sections; isec; isec = isec->next) | |
816 | { | |
817 | bfd_vma symval; | |
818 | bfd_vma shrinked_insn_address; | |
819 | ||
820 | if (isec->reloc_count == 0) | |
821 | continue; | |
822 | ||
823 | shrinked_insn_address = (sec->output_section->vma | |
824 | + sec->output_offset + addr - count); | |
825 | ||
826 | irel = elf_section_data (isec)->relocs; | |
827 | /* PR 12161: Read in the relocs for this section if necessary. */ | |
828 | if (irel == NULL) | |
829 | irel = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL, TRUE); | |
830 | ||
831 | for (irelend = irel + isec->reloc_count; irel < irelend; irel++) | |
832 | { | |
833 | /* Read this BFD's local symbols if we haven't done | |
834 | so already. */ | |
835 | if (isymbuf == NULL && symtab_hdr->sh_info != 0) | |
836 | { | |
837 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
838 | if (isymbuf == NULL) | |
839 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
840 | symtab_hdr->sh_info, 0, | |
841 | NULL, NULL, NULL); | |
842 | if (isymbuf == NULL) | |
843 | return FALSE; | |
844 | } | |
845 | ||
846 | /* Get the value of the symbol referred to by the reloc. */ | |
847 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) | |
848 | { | |
849 | /* A local symbol. */ | |
850 | asection *sym_sec; | |
851 | ||
852 | isym = isymbuf + ELF32_R_SYM (irel->r_info); | |
853 | sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
854 | symval = isym->st_value; | |
855 | /* If the reloc is absolute, it will not have | |
856 | a symbol or section associated with it. */ | |
857 | if (sym_sec == sec) | |
858 | { | |
859 | symval += sym_sec->output_section->vma | |
860 | + sym_sec->output_offset; | |
861 | ||
862 | if (debug_relax) | |
863 | printf ("Checking if the relocation's " | |
864 | "addend needs corrections.\n" | |
865 | "Address of anchor symbol: 0x%x \n" | |
866 | "Address of relocation target: 0x%x \n" | |
867 | "Address of relaxed insn: 0x%x \n", | |
868 | (unsigned int) symval, | |
869 | (unsigned int) (symval + irel->r_addend), | |
870 | (unsigned int) shrinked_insn_address); | |
871 | ||
872 | if (symval <= shrinked_insn_address | |
873 | && (symval + irel->r_addend) > shrinked_insn_address) | |
874 | { | |
875 | /* If there is an alignment boundary, we only need to | |
876 | adjust addends that end up below the boundary. */ | |
877 | bfd_vma shrink_boundary = (toaddr | |
878 | + sec->output_section->vma | |
879 | + sec->output_offset); | |
880 | ||
881 | if (debug_relax) | |
882 | printf | |
883 | ("Relocation's addend needed to be fixed \n"); | |
884 | ||
07d6d2b8 AM |
885 | if (!elf32_ft32_adjust_reloc_if_spans_insn (abfd, isec, |
886 | irel, symval, | |
887 | shrinked_insn_address, | |
888 | shrink_boundary, | |
889 | count)) | |
890 | return FALSE; | |
81b42bca JB |
891 | } |
892 | } | |
893 | /* else reference symbol is absolute. No adjustment needed. */ | |
894 | } | |
895 | /* else...Reference symbol is extern. No need for adjusting | |
896 | the addend. */ | |
897 | } | |
898 | } | |
899 | } | |
900 | ||
901 | /* Adjust the local symbols defined in this section. */ | |
902 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
903 | isym = (Elf_Internal_Sym *) symtab_hdr->contents; | |
904 | if (isym) | |
905 | { | |
906 | for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++) | |
907 | { | |
908 | if (isym->st_shndx == sec_shndx | |
909 | && isym->st_value > addr && isym->st_value < toaddr) | |
910 | isym->st_value -= count; | |
911 | } | |
912 | } | |
913 | ||
914 | /* Now adjust the global symbols defined in this section. */ | |
915 | symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) | |
916 | - symtab_hdr->sh_info); | |
917 | sym_hashes = start_hashes = elf_sym_hashes (abfd); | |
918 | end_hashes = sym_hashes + symcount; | |
919 | ||
920 | for (; sym_hashes < end_hashes; sym_hashes++) | |
921 | { | |
922 | struct elf_link_hash_entry *sym_hash = *sym_hashes; | |
923 | ||
924 | /* The '--wrap SYMBOL' option is causing a pain when the object file, | |
07d6d2b8 AM |
925 | containing the definition of __wrap_SYMBOL, includes a direct |
926 | call to SYMBOL as well. Since both __wrap_SYMBOL and SYMBOL reference | |
927 | the same symbol (which is __wrap_SYMBOL), but still exist as two | |
928 | different symbols in 'sym_hashes', we don't want to adjust | |
929 | the global symbol __wrap_SYMBOL twice. | |
930 | This check is only relevant when symbols are being wrapped. */ | |
81b42bca JB |
931 | if (link_info->wrap_hash != NULL) |
932 | { | |
933 | struct elf_link_hash_entry **cur_sym_hashes; | |
934 | ||
935 | /* Loop only over the symbols whom been already checked. */ | |
936 | for (cur_sym_hashes = start_hashes; cur_sym_hashes < sym_hashes; | |
937 | cur_sym_hashes++) | |
938 | /* If the current symbol is identical to 'sym_hash', that means | |
939 | the symbol was already adjusted (or at least checked). */ | |
940 | if (*cur_sym_hashes == sym_hash) | |
941 | break; | |
942 | ||
943 | /* Don't adjust the symbol again. */ | |
944 | if (cur_sym_hashes < sym_hashes) | |
945 | continue; | |
946 | } | |
947 | ||
948 | if ((sym_hash->root.type == bfd_link_hash_defined | |
949 | || sym_hash->root.type == bfd_link_hash_defweak) | |
950 | && sym_hash->root.u.def.section == sec | |
951 | && sym_hash->root.u.def.value > addr | |
952 | && sym_hash->root.u.def.value < toaddr) | |
953 | sym_hash->root.u.def.value -= count; | |
954 | } | |
955 | ||
956 | return TRUE; | |
957 | } | |
958 | ||
959 | /* Return TRUE if LOC can be a target of a branch, jump or call. */ | |
960 | ||
961 | static bfd_boolean | |
962 | elf32_ft32_relax_is_branch_target (struct bfd_link_info *link_info, | |
963 | bfd * abfd, asection * sec, | |
964 | bfd_vma loc) | |
965 | { | |
966 | Elf_Internal_Shdr *symtab_hdr; | |
967 | Elf_Internal_Rela *irel, *irelend; | |
968 | Elf_Internal_Sym *isym; | |
969 | Elf_Internal_Sym *isymbuf = NULL; | |
970 | bfd_vma symval; | |
971 | struct bfd_section *isec; | |
972 | ||
973 | struct elf_link_hash_entry **sym_hashes; | |
974 | struct elf_link_hash_entry **end_hashes; | |
975 | struct elf_link_hash_entry **start_hashes; | |
976 | unsigned int symcount; | |
977 | ||
978 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
979 | ||
980 | /* Now we check for relocations pointing to ret. */ | |
981 | for (isec = abfd->sections; isec; isec = isec->next) | |
982 | { | |
983 | irel = elf_section_data (isec)->relocs; | |
984 | if (irel == NULL) | |
985 | irel = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL, TRUE); | |
986 | ||
987 | irelend = irel + isec->reloc_count; | |
988 | ||
989 | for (; irel < irelend; irel++) | |
990 | { | |
991 | /* Read this BFD's local symbols if we haven't done | |
992 | so already. */ | |
993 | if (isymbuf == NULL && symtab_hdr->sh_info != 0) | |
994 | { | |
995 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
996 | if (isymbuf == NULL) | |
997 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
998 | symtab_hdr->sh_info, 0, | |
999 | NULL, NULL, NULL); | |
1000 | if (isymbuf == NULL) | |
1001 | return FALSE; | |
1002 | } | |
1003 | ||
1004 | /* Get the value of the symbol referred to by the reloc. */ | |
1005 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) | |
1006 | { | |
1007 | /* A local symbol. */ | |
1008 | asection *sym_sec; | |
1009 | ||
1010 | isym = isymbuf + ELF32_R_SYM (irel->r_info); | |
1011 | sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
1012 | symval = isym->st_value; | |
1013 | /* If the reloc is absolute, it will not have | |
1014 | a symbol or section associated with it. */ | |
1015 | if (sym_sec == sec) | |
1016 | { | |
1017 | symval += sym_sec->output_section->vma | |
07d6d2b8 | 1018 | + sym_sec->output_offset; |
81b42bca JB |
1019 | |
1020 | if (debug_relax) | |
1021 | printf ("0x%x: Address of anchor symbol: 0x%x " | |
1022 | "Address of relocation target: 0x%x \n", | |
1023 | (unsigned int) irel->r_offset, | |
1024 | (unsigned int) symval, | |
1025 | (unsigned int) (symval + irel->r_addend)); | |
1026 | if ((irel->r_addend) == loc) | |
1027 | return TRUE; | |
1028 | } | |
1029 | } | |
1030 | } | |
1031 | } | |
1032 | ||
1033 | symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) | |
1034 | - symtab_hdr->sh_info); | |
1035 | sym_hashes = start_hashes = elf_sym_hashes (abfd); | |
1036 | end_hashes = sym_hashes + symcount; | |
1037 | ||
1038 | for (; sym_hashes < end_hashes; sym_hashes++) | |
1039 | { | |
1040 | struct elf_link_hash_entry *sym_hash = *sym_hashes; | |
1041 | ||
1042 | /* The '--wrap SYMBOL' option is causing a pain when the object file, | |
1043 | containing the definition of __wrap_SYMBOL, includes a direct | |
1044 | call to SYMBOL as well. Since both __wrap_SYMBOL and SYMBOL reference | |
1045 | the same symbol (which is __wrap_SYMBOL), but still exist as two | |
1046 | different symbols in 'sym_hashes', we don't want to adjust | |
1047 | the global symbol __wrap_SYMBOL twice. | |
1048 | This check is only relevant when symbols are being wrapped. */ | |
1049 | if (link_info->wrap_hash != NULL) | |
1050 | { | |
1051 | struct elf_link_hash_entry **cur_sym_hashes; | |
1052 | ||
1053 | /* Loop only over the symbols whom been already checked. */ | |
1054 | for (cur_sym_hashes = start_hashes; cur_sym_hashes < sym_hashes; | |
1055 | cur_sym_hashes++) | |
1056 | /* If the current symbol is identical to 'sym_hash', that means | |
1057 | the symbol was already adjusted (or at least checked). */ | |
1058 | if (*cur_sym_hashes == sym_hash) | |
1059 | break; | |
1060 | ||
1061 | /* Don't adjust the symbol again. */ | |
1062 | if (cur_sym_hashes < sym_hashes) | |
1063 | continue; | |
1064 | } | |
1065 | ||
1066 | if ((sym_hash->root.type == bfd_link_hash_defined | |
1067 | || sym_hash->root.type == bfd_link_hash_defweak) | |
1068 | && sym_hash->root.u.def.section == sec | |
1069 | && sym_hash->root.u.def.value == loc) | |
1070 | return TRUE; | |
1071 | } | |
1072 | ||
1073 | return FALSE; | |
1074 | } | |
1075 | ||
1076 | static bfd_boolean | |
1077 | ft32_elf_relax_section | |
07d6d2b8 AM |
1078 | (bfd * abfd, |
1079 | asection * sec, | |
81b42bca | 1080 | struct bfd_link_info * link_info, |
07d6d2b8 | 1081 | bfd_boolean * again) |
81b42bca JB |
1082 | { |
1083 | Elf_Internal_Rela * free_relocs = NULL; | |
1084 | Elf_Internal_Rela * internal_relocs; | |
1085 | Elf_Internal_Rela * irelend; | |
1086 | Elf_Internal_Rela * irel; | |
07d6d2b8 | 1087 | bfd_byte * contents = NULL; |
81b42bca JB |
1088 | Elf_Internal_Shdr * symtab_hdr; |
1089 | Elf_Internal_Sym * isymbuf = NULL; | |
1090 | ||
1091 | /* Assume nothing changes. */ | |
1092 | *again = FALSE; | |
1093 | ||
1094 | /* We don't have to do anything for a relocatable link, if | |
1095 | this section does not have relocs, or if this is not a | |
1096 | code section. */ | |
1097 | if (bfd_link_relocatable (link_info) | |
1098 | || (sec->flags & SEC_RELOC) == 0 | |
1099 | || sec->reloc_count == 0 | |
1100 | || (sec->flags & SEC_CODE) == 0) | |
1101 | return TRUE; | |
1102 | ||
1103 | /* Get the section contents. */ | |
1104 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
1105 | contents = elf_section_data (sec)->this_hdr.contents; | |
1106 | /* Go get them off disk. */ | |
1107 | else | |
1108 | { | |
1109 | if (! bfd_malloc_and_get_section (abfd, sec, &contents)) | |
1110 | goto error_return; | |
1111 | elf_section_data (sec)->this_hdr.contents = contents; | |
1112 | } | |
1113 | ||
1114 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
1115 | ||
1116 | /* Read this BFD's local symbols if we haven't done so already. */ | |
1117 | if (isymbuf == NULL && symtab_hdr->sh_info != 0) | |
1118 | { | |
1119 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
1120 | if (isymbuf == NULL) | |
1121 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
1122 | symtab_hdr->sh_info, 0, | |
1123 | NULL, NULL, NULL); | |
1124 | if (isymbuf == NULL) | |
1125 | goto error_return; | |
1126 | symtab_hdr->contents = (unsigned char *) isymbuf; | |
1127 | } | |
1128 | ||
1129 | internal_relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, | |
1130 | link_info->keep_memory); | |
1131 | if (internal_relocs == NULL) | |
1132 | goto error_return; | |
1133 | if (! link_info->keep_memory) | |
1134 | free_relocs = internal_relocs; | |
1135 | ||
1136 | /* Walk through them looking for relaxing opportunities. */ | |
1137 | irelend = internal_relocs + sec->reloc_count; | |
1138 | ||
1139 | /* Test every adjacent pair of relocs. If both have shortcodes, | |
1140 | fuse them and delete the relocs. */ | |
1141 | irel = internal_relocs; | |
1142 | while (irel < irelend - 1) | |
1143 | { | |
1144 | Elf_Internal_Rela * irel_next = irel + 1; | |
1145 | unsigned int sc0, sc1; | |
1146 | bfd_vma pc; | |
1147 | ||
1148 | pc = irel->r_offset; | |
1149 | ||
1150 | if (((pc + 4) == (irel_next->r_offset)) | |
1151 | && ft32_reloc_shortable (abfd, sec, isymbuf, contents, pc, irel, | |
1152 | &sc0) | |
1153 | && ft32_reloc_shortable (abfd, sec, isymbuf, contents, pc, | |
1154 | irel_next, &sc1) | |
1155 | && !elf32_ft32_relax_is_branch_target (link_info, abfd, sec, | |
1156 | irel_next->r_offset)) | |
1157 | { | |
1158 | unsigned int code30 = (sc1 << 15) | sc0; | |
1159 | unsigned int code27 = code30 >> 3; | |
1160 | unsigned int code3 = code30 & 7; | |
1161 | static const unsigned char pat3[] = {2, 3, 4, 5, 6, 9, 10, 14}; | |
1162 | unsigned int pattern = pat3[code3]; | |
1163 | unsigned int fused = (pattern << 27) | code27; | |
1164 | ||
1165 | /* Move second reloc to same place as first. */ | |
1166 | irel_next->r_offset = irel->r_offset; | |
1167 | ||
1168 | /* Change both relocs to R_FT32_NONE. */ | |
1169 | ||
1170 | if (ELF32_R_TYPE (irel->r_info) == R_FT32_18) | |
1171 | { | |
1172 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
07d6d2b8 | 1173 | R_FT32_SC0); |
81b42bca JB |
1174 | } |
1175 | else | |
1176 | { | |
1177 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
07d6d2b8 | 1178 | R_FT32_NONE); |
81b42bca JB |
1179 | } |
1180 | ||
1181 | if (ELF32_R_TYPE (irel_next->r_info) == R_FT32_18) | |
1182 | { | |
1183 | irel_next->r_info = ELF32_R_INFO (ELF32_R_SYM (irel_next->r_info), | |
1184 | R_FT32_SC1); | |
1185 | } | |
1186 | else | |
1187 | { | |
1188 | irel_next->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
1189 | R_FT32_NONE); | |
1190 | } | |
1191 | ||
1192 | /* Replace the first insn with the fused version. */ | |
1193 | bfd_put_32 (abfd, fused, contents + irel->r_offset); | |
1194 | ||
1195 | /* Delete the second insn. */ | |
1196 | if (!elf32_ft32_relax_delete_bytes (link_info, abfd, sec, | |
1197 | irel->r_offset + 4, 4)) | |
1198 | goto error_return; | |
1199 | ||
1200 | /* That will change things, so, we should relax again. | |
1201 | Note that this is not required, and it may be slow. */ | |
1202 | *again = TRUE; | |
1203 | ||
1204 | irel += 2; | |
1205 | } | |
1206 | else | |
1207 | { | |
1208 | irel += 1; | |
1209 | } | |
1210 | } | |
1211 | ||
1212 | if (isymbuf != NULL | |
1213 | && symtab_hdr->contents != (unsigned char *) isymbuf) | |
1214 | { | |
1215 | if (! link_info->keep_memory) | |
1216 | free (isymbuf); | |
1217 | else | |
1218 | /* Cache the symbols for elf_link_input_bfd. */ | |
1219 | symtab_hdr->contents = (unsigned char *) isymbuf; | |
1220 | } | |
1221 | ||
1222 | if (contents != NULL | |
1223 | && elf_section_data (sec)->this_hdr.contents != contents) | |
1224 | { | |
1225 | if (! link_info->keep_memory) | |
1226 | free (contents); | |
1227 | else | |
1228 | /* Cache the section contents for elf_link_input_bfd. */ | |
1229 | elf_section_data (sec)->this_hdr.contents = contents; | |
1230 | ||
1231 | } | |
1232 | ||
c9594989 | 1233 | if (elf_section_data (sec)->relocs != internal_relocs) |
81b42bca JB |
1234 | free (internal_relocs); |
1235 | ||
1236 | return TRUE; | |
1237 | ||
1238 | error_return: | |
c9594989 | 1239 | free (free_relocs); |
81b42bca JB |
1240 | |
1241 | return TRUE; | |
1242 | } | |
1243 | \f | |
3f8107ab AM |
1244 | #define ELF_ARCH bfd_arch_ft32 |
1245 | #define ELF_MACHINE_CODE EM_FT32 | |
1246 | #define ELF_MAXPAGESIZE 0x1 | |
1247 | ||
1248 | #define TARGET_LITTLE_SYM ft32_elf32_vec | |
1249 | #define TARGET_LITTLE_NAME "elf32-ft32" | |
1250 | ||
1251 | #define elf_info_to_howto_rel NULL | |
1252 | #define elf_info_to_howto ft32_info_to_howto_rela | |
1253 | #define elf_backend_relocate_section ft32_elf_relocate_section | |
1254 | ||
1255 | #define elf_backend_can_gc_sections 1 | |
1256 | #define elf_backend_rela_normal 1 | |
1257 | ||
1258 | #define bfd_elf32_bfd_reloc_type_lookup ft32_reloc_type_lookup | |
1259 | #define bfd_elf32_bfd_reloc_name_lookup ft32_reloc_name_lookup | |
1260 | ||
81b42bca JB |
1261 | #define bfd_elf32_bfd_relax_section ft32_elf_relax_section |
1262 | ||
3f8107ab | 1263 | #include "elf32-target.h" |