Commit | Line | Data |
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ae1b99e4 | 1 | /* Matsushita 10300 specific support for 32-bit ELF |
8821be29 | 2 | Copyright (C) 1996, 1997 Free Software Foundation, Inc. |
efc2b064 JL |
3 | |
4 | This file is part of BFD, the Binary File Descriptor library. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
19 | ||
20 | #include "bfd.h" | |
21 | #include "sysdep.h" | |
22 | #include "libbfd.h" | |
23 | #include "elf-bfd.h" | |
24 | ||
25 | static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup | |
26 | PARAMS ((bfd *abfd, bfd_reloc_code_real_type code)); | |
943686fa JL |
27 | static void mn10300_info_to_howto |
28 | PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *)); | |
12fdaaf8 JL |
29 | static bfd_reloc_status_type bfd_elf32_mn10300_reloc |
30 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
31 | ||
efc2b064 | 32 | |
943686fa JL |
33 | /* We have to use RELA instructions since md_apply_fix3 in the assembler |
34 | does absolutely nothing. */ | |
35 | #define USE_RELA | |
efc2b064 JL |
36 | |
37 | enum reloc_type | |
38 | { | |
ae1b99e4 | 39 | R_MN10300_NONE = 0, |
c3239e66 JL |
40 | R_MN10300_32, |
41 | R_MN10300_16, | |
42 | R_MN10300_8, | |
77bf22e6 JL |
43 | R_MN10300_PCREL32, |
44 | R_MN10300_PCREL16, | |
45 | R_MN10300_PCREL8, | |
ae1b99e4 | 46 | R_MN10300_MAX |
efc2b064 JL |
47 | }; |
48 | ||
ae1b99e4 | 49 | static reloc_howto_type elf_mn10300_howto_table[] = |
efc2b064 | 50 | { |
207e944c | 51 | /* Dummy relocation. Does nothing. */ |
ae1b99e4 | 52 | HOWTO (R_MN10300_NONE, |
efc2b064 JL |
53 | 0, |
54 | 2, | |
55 | 16, | |
56 | false, | |
57 | 0, | |
58 | complain_overflow_bitfield, | |
59 | bfd_elf_generic_reloc, | |
ae1b99e4 | 60 | "R_MN10300_NONE", |
efc2b064 JL |
61 | false, |
62 | 0, | |
63 | 0, | |
64 | false), | |
207e944c | 65 | /* Standard 32 bit reloc. */ |
c3239e66 JL |
66 | HOWTO (R_MN10300_32, |
67 | 0, | |
68 | 2, | |
69 | 32, | |
70 | false, | |
71 | 0, | |
72 | complain_overflow_bitfield, | |
73 | bfd_elf_generic_reloc, | |
74 | "R_MN10300_32", | |
d28f058e | 75 | false, |
c3239e66 JL |
76 | 0xffffffff, |
77 | 0xffffffff, | |
78 | false), | |
207e944c | 79 | /* Standard 16 bit reloc. */ |
c3239e66 JL |
80 | HOWTO (R_MN10300_16, |
81 | 0, | |
82 | 1, | |
83 | 16, | |
84 | false, | |
85 | 0, | |
86 | complain_overflow_bitfield, | |
87 | bfd_elf_generic_reloc, | |
88 | "R_MN10300_16", | |
d28f058e | 89 | false, |
c3239e66 JL |
90 | 0xffff, |
91 | 0xffff, | |
92 | false), | |
207e944c | 93 | /* Standard 8 bit reloc. */ |
c3239e66 JL |
94 | HOWTO (R_MN10300_8, |
95 | 0, | |
96 | 0, | |
97 | 8, | |
98 | false, | |
99 | 0, | |
100 | complain_overflow_bitfield, | |
101 | bfd_elf_generic_reloc, | |
102 | "R_MN10300_8", | |
d28f058e | 103 | false, |
c3239e66 JL |
104 | 0xff, |
105 | 0xff, | |
106 | false), | |
77bf22e6 JL |
107 | /* Standard 32bit pc-relative reloc. */ |
108 | HOWTO (R_MN10300_PCREL32, | |
12fdaaf8 JL |
109 | 0, |
110 | 2, | |
111 | 32, | |
112 | true, | |
113 | 0, | |
114 | complain_overflow_bitfield, | |
77bf22e6 JL |
115 | bfd_elf_generic_reloc, |
116 | "R_MN10300_PCREL32", | |
117 | false, | |
c3239e66 JL |
118 | 0xffffffff, |
119 | 0xffffffff, | |
77bf22e6 JL |
120 | true), |
121 | /* Standard 16bit pc-relative reloc. */ | |
122 | HOWTO (R_MN10300_PCREL16, | |
c3239e66 JL |
123 | 0, |
124 | 1, | |
125 | 16, | |
126 | true, | |
127 | 0, | |
128 | complain_overflow_bitfield, | |
77bf22e6 JL |
129 | bfd_elf_generic_reloc, |
130 | "R_MN10300_PCREL16", | |
131 | false, | |
c3239e66 JL |
132 | 0xffff, |
133 | 0xffff, | |
77bf22e6 JL |
134 | true), |
135 | /* Standard 8 pc-relative reloc. */ | |
136 | HOWTO (R_MN10300_PCREL8, | |
c3239e66 JL |
137 | 0, |
138 | 0, | |
139 | 8, | |
140 | true, | |
141 | 0, | |
142 | complain_overflow_bitfield, | |
77bf22e6 JL |
143 | bfd_elf_generic_reloc, |
144 | "R_MN10300_PCREL8", | |
145 | false, | |
c3239e66 JL |
146 | 0xff, |
147 | 0xff, | |
12fdaaf8 | 148 | true), |
efc2b064 JL |
149 | }; |
150 | ||
ae1b99e4 | 151 | struct mn10300_reloc_map |
efc2b064 JL |
152 | { |
153 | unsigned char bfd_reloc_val; | |
154 | unsigned char elf_reloc_val; | |
155 | }; | |
156 | ||
ae1b99e4 | 157 | static const struct mn10300_reloc_map mn10300_reloc_map[] = |
efc2b064 | 158 | { |
ae1b99e4 | 159 | { BFD_RELOC_NONE, R_MN10300_NONE, }, |
c3239e66 JL |
160 | { BFD_RELOC_32, R_MN10300_32, }, |
161 | { BFD_RELOC_16, R_MN10300_16, }, | |
162 | { BFD_RELOC_8, R_MN10300_8, }, | |
77bf22e6 JL |
163 | { BFD_RELOC_32_PCREL, R_MN10300_PCREL32, }, |
164 | { BFD_RELOC_16_PCREL, R_MN10300_PCREL16, }, | |
165 | { BFD_RELOC_8_PCREL, R_MN10300_PCREL8, }, | |
efc2b064 JL |
166 | }; |
167 | ||
168 | static reloc_howto_type * | |
169 | bfd_elf32_bfd_reloc_type_lookup (abfd, code) | |
170 | bfd *abfd; | |
171 | bfd_reloc_code_real_type code; | |
172 | { | |
173 | unsigned int i; | |
174 | ||
175 | for (i = 0; | |
ae1b99e4 | 176 | i < sizeof (mn10300_reloc_map) / sizeof (struct mn10300_reloc_map); |
efc2b064 JL |
177 | i++) |
178 | { | |
ae1b99e4 JL |
179 | if (mn10300_reloc_map[i].bfd_reloc_val == code) |
180 | return &elf_mn10300_howto_table[mn10300_reloc_map[i].elf_reloc_val]; | |
efc2b064 JL |
181 | } |
182 | ||
183 | return NULL; | |
184 | } | |
185 | ||
12fdaaf8 | 186 | /* Set the howto pointer for an MN10300 ELF reloc. */ |
efc2b064 JL |
187 | |
188 | static void | |
943686fa | 189 | mn10300_info_to_howto (abfd, cache_ptr, dst) |
efc2b064 JL |
190 | bfd *abfd; |
191 | arelent *cache_ptr; | |
943686fa | 192 | Elf32_Internal_Rela *dst; |
efc2b064 JL |
193 | { |
194 | unsigned int r_type; | |
195 | ||
196 | r_type = ELF32_R_TYPE (dst->r_info); | |
ae1b99e4 JL |
197 | BFD_ASSERT (r_type < (unsigned int) R_MN10300_MAX); |
198 | cache_ptr->howto = &elf_mn10300_howto_table[r_type]; | |
efc2b064 JL |
199 | } |
200 | ||
5847e6dd JL |
201 | /* Perform a relocation as part of a final link. */ |
202 | static bfd_reloc_status_type | |
203 | mn10300_elf_final_link_relocate (howto, input_bfd, output_bfd, | |
204 | input_section, contents, offset, value, | |
205 | addend, info, sym_sec, is_local) | |
206 | reloc_howto_type *howto; | |
207 | bfd *input_bfd; | |
208 | bfd *output_bfd; | |
209 | asection *input_section; | |
210 | bfd_byte *contents; | |
211 | bfd_vma offset; | |
212 | bfd_vma value; | |
213 | bfd_vma addend; | |
214 | struct bfd_link_info *info; | |
215 | asection *sym_sec; | |
216 | int is_local; | |
217 | { | |
218 | unsigned long r_type = howto->type; | |
219 | bfd_byte *hit_data = contents + offset; | |
220 | ||
221 | switch (r_type) | |
222 | { | |
223 | ||
224 | case R_MN10300_NONE: | |
225 | return bfd_reloc_ok; | |
226 | ||
227 | case R_MN10300_32: | |
228 | value += addend; | |
229 | bfd_put_32 (input_bfd, value, hit_data); | |
230 | return bfd_reloc_ok; | |
231 | ||
232 | case R_MN10300_16: | |
233 | value += addend; | |
234 | ||
235 | if ((long)value > 0x7fff || (long)value < -0x8000) | |
236 | return bfd_reloc_overflow; | |
237 | ||
238 | bfd_put_16 (input_bfd, value, hit_data); | |
239 | return bfd_reloc_ok; | |
240 | ||
241 | case R_MN10300_8: | |
242 | value += addend; | |
243 | ||
244 | if ((long)value > 0x7fff || (long)value < -0x8000) | |
245 | return bfd_reloc_overflow; | |
246 | ||
247 | bfd_put_8 (input_bfd, value, hit_data); | |
248 | return bfd_reloc_ok; | |
249 | ||
250 | case R_MN10300_PCREL8: | |
251 | value -= (input_section->output_section->vma | |
252 | + input_section->output_offset); | |
253 | value -= offset; | |
254 | value += addend; | |
255 | ||
256 | if ((long)value > 0xff || (long)value < -0x100) | |
257 | return bfd_reloc_overflow; | |
258 | ||
259 | bfd_put_8 (input_bfd, value, hit_data); | |
260 | return bfd_reloc_ok; | |
261 | ||
262 | case R_MN10300_PCREL16: | |
263 | value -= (input_section->output_section->vma | |
264 | + input_section->output_offset); | |
265 | value -= offset; | |
266 | value += addend; | |
267 | ||
268 | if ((long)value > 0xffff || (long)value < -0x10000) | |
269 | return bfd_reloc_overflow; | |
270 | ||
271 | bfd_put_16 (input_bfd, value, hit_data); | |
272 | return bfd_reloc_ok; | |
273 | ||
274 | case R_MN10300_PCREL32: | |
275 | value -= (input_section->output_section->vma | |
276 | + input_section->output_offset); | |
277 | value -= offset; | |
278 | value += addend; | |
279 | ||
280 | bfd_put_32 (input_bfd, value, hit_data); | |
281 | return bfd_reloc_ok; | |
282 | ||
283 | default: | |
284 | return bfd_reloc_notsupported; | |
285 | } | |
286 | } | |
287 | ||
288 | \f | |
289 | /* Relocate an MN10300 ELF section. */ | |
290 | static boolean | |
291 | mn10300_elf_relocate_section (output_bfd, info, input_bfd, input_section, | |
292 | contents, relocs, local_syms, local_sections) | |
293 | bfd *output_bfd; | |
294 | struct bfd_link_info *info; | |
295 | bfd *input_bfd; | |
296 | asection *input_section; | |
297 | bfd_byte *contents; | |
298 | Elf_Internal_Rela *relocs; | |
299 | Elf_Internal_Sym *local_syms; | |
300 | asection **local_sections; | |
301 | { | |
302 | Elf_Internal_Shdr *symtab_hdr; | |
303 | struct elf_link_hash_entry **sym_hashes; | |
304 | Elf_Internal_Rela *rel, *relend; | |
305 | ||
306 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
307 | sym_hashes = elf_sym_hashes (input_bfd); | |
308 | ||
309 | rel = relocs; | |
310 | relend = relocs + input_section->reloc_count; | |
311 | for (; rel < relend; rel++) | |
312 | { | |
313 | int r_type; | |
314 | reloc_howto_type *howto; | |
315 | unsigned long r_symndx; | |
316 | Elf_Internal_Sym *sym; | |
317 | asection *sec; | |
318 | struct elf_link_hash_entry *h; | |
319 | bfd_vma relocation; | |
320 | bfd_reloc_status_type r; | |
321 | ||
322 | r_symndx = ELF32_R_SYM (rel->r_info); | |
323 | r_type = ELF32_R_TYPE (rel->r_info); | |
324 | howto = elf_mn10300_howto_table + r_type; | |
325 | ||
326 | if (info->relocateable) | |
327 | { | |
328 | /* This is a relocateable link. We don't have to change | |
329 | anything, unless the reloc is against a section symbol, | |
330 | in which case we have to adjust according to where the | |
331 | section symbol winds up in the output section. */ | |
332 | if (r_symndx < symtab_hdr->sh_info) | |
333 | { | |
334 | sym = local_syms + r_symndx; | |
335 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
336 | { | |
337 | sec = local_sections[r_symndx]; | |
338 | rel->r_addend += sec->output_offset + sym->st_value; | |
339 | } | |
340 | } | |
341 | ||
342 | continue; | |
343 | } | |
344 | ||
345 | /* This is a final link. */ | |
346 | h = NULL; | |
347 | sym = NULL; | |
348 | sec = NULL; | |
349 | if (r_symndx < symtab_hdr->sh_info) | |
350 | { | |
351 | sym = local_syms + r_symndx; | |
352 | sec = local_sections[r_symndx]; | |
353 | relocation = (sec->output_section->vma | |
354 | + sec->output_offset | |
355 | + sym->st_value); | |
356 | } | |
357 | else | |
358 | { | |
359 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
360 | while (h->root.type == bfd_link_hash_indirect | |
361 | || h->root.type == bfd_link_hash_warning) | |
362 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
363 | if (h->root.type == bfd_link_hash_defined | |
364 | || h->root.type == bfd_link_hash_defweak) | |
365 | { | |
366 | sec = h->root.u.def.section; | |
367 | relocation = (h->root.u.def.value | |
368 | + sec->output_section->vma | |
369 | + sec->output_offset); | |
370 | } | |
371 | else if (h->root.type == bfd_link_hash_undefweak) | |
372 | relocation = 0; | |
373 | else | |
374 | { | |
375 | if (! ((*info->callbacks->undefined_symbol) | |
376 | (info, h->root.root.string, input_bfd, | |
377 | input_section, rel->r_offset))) | |
378 | return false; | |
379 | relocation = 0; | |
380 | } | |
381 | } | |
382 | ||
383 | r = mn10300_elf_final_link_relocate (howto, input_bfd, output_bfd, | |
384 | input_section, | |
385 | contents, rel->r_offset, | |
386 | relocation, rel->r_addend, | |
387 | info, sec, h == NULL); | |
388 | ||
389 | if (r != bfd_reloc_ok) | |
390 | { | |
391 | const char *name; | |
392 | const char *msg = (const char *)0; | |
393 | ||
394 | if (h != NULL) | |
395 | name = h->root.root.string; | |
396 | else | |
397 | { | |
398 | name = (bfd_elf_string_from_elf_section | |
399 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); | |
400 | if (name == NULL || *name == '\0') | |
401 | name = bfd_section_name (input_bfd, sec); | |
402 | } | |
403 | ||
404 | switch (r) | |
405 | { | |
406 | case bfd_reloc_overflow: | |
407 | if (! ((*info->callbacks->reloc_overflow) | |
408 | (info, name, howto->name, (bfd_vma) 0, | |
409 | input_bfd, input_section, rel->r_offset))) | |
410 | return false; | |
411 | break; | |
412 | ||
413 | case bfd_reloc_undefined: | |
414 | if (! ((*info->callbacks->undefined_symbol) | |
415 | (info, name, input_bfd, input_section, | |
416 | rel->r_offset))) | |
417 | return false; | |
418 | break; | |
419 | ||
420 | case bfd_reloc_outofrange: | |
421 | msg = "internal error: out of range error"; | |
422 | goto common_error; | |
423 | ||
424 | case bfd_reloc_notsupported: | |
425 | msg = "internal error: unsupported relocation error"; | |
426 | goto common_error; | |
427 | ||
428 | case bfd_reloc_dangerous: | |
429 | msg = "internal error: dangerous error"; | |
430 | goto common_error; | |
431 | ||
432 | default: | |
433 | msg = "internal error: unknown error"; | |
434 | /* fall through */ | |
435 | ||
436 | common_error: | |
437 | if (!((*info->callbacks->warning) | |
438 | (info, msg, name, input_bfd, input_section, | |
439 | rel->r_offset))) | |
440 | return false; | |
441 | break; | |
442 | } | |
443 | } | |
444 | } | |
445 | ||
446 | return true; | |
447 | } | |
448 | ||
ae1b99e4 JL |
449 | #define TARGET_LITTLE_SYM bfd_elf32_mn10300_vec |
450 | #define TARGET_LITTLE_NAME "elf32-mn10300" | |
451 | #define ELF_ARCH bfd_arch_mn10300 | |
452 | #define ELF_MACHINE_CODE EM_CYGNUS_MN10300 | |
efc2b064 JL |
453 | #define ELF_MAXPAGESIZE 0x1000 |
454 | ||
943686fa JL |
455 | #define elf_info_to_howto mn10300_info_to_howto |
456 | #define elf_info_to_howto_rel 0 | |
5847e6dd | 457 | #define elf_backend_relocate_section mn10300_elf_relocate_section |
efc2b064 | 458 | |
31cffd2e JL |
459 | #define elf_symbol_leading_char '_' |
460 | ||
efc2b064 | 461 | #include "elf32-target.h" |