Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* Matsushita 10200 specific support for 32-bit ELF |
c7e2358a AM |
2 | Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, |
3 | 2007, 2010 | |
7898deda | 4 | Free Software Foundation, Inc. |
252b5132 | 5 | |
cd123cb7 | 6 | This file is part of BFD, the Binary File Descriptor library. |
252b5132 | 7 | |
cd123cb7 NC |
8 | This program is free software; you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 3 of the License, or | |
11 | (at your option) any later version. | |
252b5132 | 12 | |
cd123cb7 NC |
13 | This program is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
252b5132 | 17 | |
cd123cb7 NC |
18 | You should have received a copy of the GNU General Public License |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
21 | MA 02110-1301, USA. */ | |
252b5132 | 22 | |
252b5132 | 23 | #include "sysdep.h" |
3db64b00 | 24 | #include "bfd.h" |
252b5132 RH |
25 | #include "libbfd.h" |
26 | #include "elf-bfd.h" | |
27 | ||
28 | static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup | |
29 | PARAMS ((bfd *abfd, bfd_reloc_code_real_type code)); | |
30 | static void mn10200_info_to_howto | |
947216bf | 31 | PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); |
b34976b6 | 32 | static bfd_boolean mn10200_elf_relax_delete_bytes |
252b5132 | 33 | PARAMS ((bfd *, asection *, bfd_vma, int)); |
b34976b6 | 34 | static bfd_boolean mn10200_elf_symbol_address_p |
6cdc0ccc | 35 | PARAMS ((bfd *, asection *, Elf_Internal_Sym *, bfd_vma)); |
917583ad NC |
36 | static bfd_reloc_status_type mn10200_elf_final_link_relocate |
37 | PARAMS ((reloc_howto_type *, bfd *, bfd *, asection *, | |
38 | bfd_byte *, bfd_vma, bfd_vma, bfd_vma, | |
39 | struct bfd_link_info *, asection *, int)); | |
b34976b6 AM |
40 | static bfd_boolean mn10200_elf_relocate_section |
41 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, | |
42 | bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Sym *, | |
43 | asection **)); | |
44 | static bfd_boolean mn10200_elf_relax_section | |
45 | PARAMS ((bfd *, asection *, struct bfd_link_info *, bfd_boolean *)); | |
917583ad NC |
46 | static bfd_byte * mn10200_elf_get_relocated_section_contents |
47 | PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *, | |
b34976b6 | 48 | bfd_byte *, bfd_boolean, asymbol **)); |
252b5132 | 49 | |
27def10f | 50 | enum reloc_type { |
252b5132 RH |
51 | R_MN10200_NONE = 0, |
52 | R_MN10200_32, | |
53 | R_MN10200_16, | |
54 | R_MN10200_8, | |
55 | R_MN10200_24, | |
56 | R_MN10200_PCREL8, | |
57 | R_MN10200_PCREL16, | |
58 | R_MN10200_PCREL24, | |
59 | R_MN10200_MAX | |
60 | }; | |
61 | ||
27def10f | 62 | static reloc_howto_type elf_mn10200_howto_table[] = { |
252b5132 RH |
63 | /* Dummy relocation. Does nothing. */ |
64 | HOWTO (R_MN10200_NONE, | |
65 | 0, | |
66 | 2, | |
67 | 16, | |
b34976b6 | 68 | FALSE, |
252b5132 RH |
69 | 0, |
70 | complain_overflow_bitfield, | |
71 | bfd_elf_generic_reloc, | |
72 | "R_MN10200_NONE", | |
b34976b6 | 73 | FALSE, |
252b5132 RH |
74 | 0, |
75 | 0, | |
b34976b6 | 76 | FALSE), |
252b5132 RH |
77 | /* Standard 32 bit reloc. */ |
78 | HOWTO (R_MN10200_32, | |
79 | 0, | |
80 | 2, | |
81 | 32, | |
b34976b6 | 82 | FALSE, |
252b5132 RH |
83 | 0, |
84 | complain_overflow_bitfield, | |
85 | bfd_elf_generic_reloc, | |
86 | "R_MN10200_32", | |
b34976b6 | 87 | FALSE, |
252b5132 RH |
88 | 0xffffffff, |
89 | 0xffffffff, | |
b34976b6 | 90 | FALSE), |
252b5132 RH |
91 | /* Standard 16 bit reloc. */ |
92 | HOWTO (R_MN10200_16, | |
93 | 0, | |
94 | 1, | |
95 | 16, | |
b34976b6 | 96 | FALSE, |
252b5132 RH |
97 | 0, |
98 | complain_overflow_bitfield, | |
99 | bfd_elf_generic_reloc, | |
100 | "R_MN10200_16", | |
b34976b6 | 101 | FALSE, |
252b5132 RH |
102 | 0xffff, |
103 | 0xffff, | |
b34976b6 | 104 | FALSE), |
252b5132 RH |
105 | /* Standard 8 bit reloc. */ |
106 | HOWTO (R_MN10200_8, | |
107 | 0, | |
108 | 0, | |
109 | 8, | |
b34976b6 | 110 | FALSE, |
252b5132 RH |
111 | 0, |
112 | complain_overflow_bitfield, | |
113 | bfd_elf_generic_reloc, | |
114 | "R_MN10200_8", | |
b34976b6 | 115 | FALSE, |
252b5132 RH |
116 | 0xff, |
117 | 0xff, | |
b34976b6 | 118 | FALSE), |
252b5132 RH |
119 | /* Standard 24 bit reloc. */ |
120 | HOWTO (R_MN10200_24, | |
121 | 0, | |
122 | 2, | |
123 | 24, | |
b34976b6 | 124 | FALSE, |
252b5132 RH |
125 | 0, |
126 | complain_overflow_bitfield, | |
127 | bfd_elf_generic_reloc, | |
128 | "R_MN10200_24", | |
b34976b6 | 129 | FALSE, |
252b5132 RH |
130 | 0xffffff, |
131 | 0xffffff, | |
b34976b6 | 132 | FALSE), |
252b5132 RH |
133 | /* Simple 8 pc-relative reloc. */ |
134 | HOWTO (R_MN10200_PCREL8, | |
135 | 0, | |
136 | 0, | |
137 | 8, | |
b34976b6 | 138 | TRUE, |
252b5132 RH |
139 | 0, |
140 | complain_overflow_bitfield, | |
141 | bfd_elf_generic_reloc, | |
142 | "R_MN10200_PCREL8", | |
b34976b6 | 143 | FALSE, |
252b5132 RH |
144 | 0xff, |
145 | 0xff, | |
b34976b6 | 146 | TRUE), |
252b5132 RH |
147 | /* Simple 16 pc-relative reloc. */ |
148 | HOWTO (R_MN10200_PCREL16, | |
149 | 0, | |
150 | 1, | |
151 | 16, | |
b34976b6 | 152 | TRUE, |
252b5132 RH |
153 | 0, |
154 | complain_overflow_bitfield, | |
155 | bfd_elf_generic_reloc, | |
156 | "R_MN10200_PCREL16", | |
b34976b6 | 157 | FALSE, |
252b5132 RH |
158 | 0xffff, |
159 | 0xffff, | |
b34976b6 | 160 | TRUE), |
252b5132 RH |
161 | /* Simple 32bit pc-relative reloc with a 1 byte adjustment |
162 | to get the pc-relative offset correct. */ | |
163 | HOWTO (R_MN10200_PCREL24, | |
164 | 0, | |
165 | 2, | |
166 | 24, | |
b34976b6 | 167 | TRUE, |
252b5132 RH |
168 | 0, |
169 | complain_overflow_bitfield, | |
170 | bfd_elf_generic_reloc, | |
171 | "R_MN10200_PCREL24", | |
b34976b6 | 172 | FALSE, |
252b5132 RH |
173 | 0xffffff, |
174 | 0xffffff, | |
b34976b6 | 175 | TRUE), |
252b5132 RH |
176 | }; |
177 | ||
27def10f | 178 | struct mn10200_reloc_map { |
252b5132 RH |
179 | bfd_reloc_code_real_type bfd_reloc_val; |
180 | unsigned char elf_reloc_val; | |
181 | }; | |
182 | ||
27def10f KH |
183 | static const struct mn10200_reloc_map mn10200_reloc_map[] = { |
184 | { BFD_RELOC_NONE , R_MN10200_NONE , }, | |
185 | { BFD_RELOC_32 , R_MN10200_32 , }, | |
186 | { BFD_RELOC_16 , R_MN10200_16 , }, | |
187 | { BFD_RELOC_8 , R_MN10200_8 , }, | |
188 | { BFD_RELOC_24 , R_MN10200_24 , }, | |
189 | { BFD_RELOC_8_PCREL , R_MN10200_PCREL8 , }, | |
252b5132 RH |
190 | { BFD_RELOC_16_PCREL, R_MN10200_PCREL16, }, |
191 | { BFD_RELOC_24_PCREL, R_MN10200_PCREL24, }, | |
192 | }; | |
193 | ||
194 | static reloc_howto_type * | |
195 | bfd_elf32_bfd_reloc_type_lookup (abfd, code) | |
5f771d47 | 196 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
197 | bfd_reloc_code_real_type code; |
198 | { | |
199 | unsigned int i; | |
200 | ||
201 | for (i = 0; | |
202 | i < sizeof (mn10200_reloc_map) / sizeof (struct mn10200_reloc_map); | |
203 | i++) | |
204 | { | |
205 | if (mn10200_reloc_map[i].bfd_reloc_val == code) | |
206 | return &elf_mn10200_howto_table[mn10200_reloc_map[i].elf_reloc_val]; | |
207 | } | |
208 | ||
209 | return NULL; | |
210 | } | |
211 | ||
157090f7 AM |
212 | static reloc_howto_type * |
213 | bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
214 | const char *r_name) | |
215 | { | |
216 | unsigned int i; | |
217 | ||
218 | for (i = 0; | |
219 | i < (sizeof (elf_mn10200_howto_table) | |
220 | / sizeof (elf_mn10200_howto_table[0])); | |
221 | i++) | |
222 | if (elf_mn10200_howto_table[i].name != NULL | |
223 | && strcasecmp (elf_mn10200_howto_table[i].name, r_name) == 0) | |
224 | return &elf_mn10200_howto_table[i]; | |
225 | ||
226 | return NULL; | |
227 | } | |
228 | ||
252b5132 RH |
229 | /* Set the howto pointer for an MN10200 ELF reloc. */ |
230 | ||
231 | static void | |
232 | mn10200_info_to_howto (abfd, cache_ptr, dst) | |
5f771d47 | 233 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 | 234 | arelent *cache_ptr; |
947216bf | 235 | Elf_Internal_Rela *dst; |
252b5132 RH |
236 | { |
237 | unsigned int r_type; | |
238 | ||
239 | r_type = ELF32_R_TYPE (dst->r_info); | |
240 | BFD_ASSERT (r_type < (unsigned int) R_MN10200_MAX); | |
241 | cache_ptr->howto = &elf_mn10200_howto_table[r_type]; | |
242 | } | |
243 | ||
244 | /* Perform a relocation as part of a final link. */ | |
917583ad | 245 | |
252b5132 RH |
246 | static bfd_reloc_status_type |
247 | mn10200_elf_final_link_relocate (howto, input_bfd, output_bfd, | |
248 | input_section, contents, offset, value, | |
249 | addend, info, sym_sec, is_local) | |
250 | reloc_howto_type *howto; | |
251 | bfd *input_bfd; | |
5f771d47 | 252 | bfd *output_bfd ATTRIBUTE_UNUSED; |
252b5132 RH |
253 | asection *input_section; |
254 | bfd_byte *contents; | |
255 | bfd_vma offset; | |
256 | bfd_vma value; | |
257 | bfd_vma addend; | |
5f771d47 ILT |
258 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
259 | asection *sym_sec ATTRIBUTE_UNUSED; | |
260 | int is_local ATTRIBUTE_UNUSED; | |
252b5132 RH |
261 | { |
262 | unsigned long r_type = howto->type; | |
263 | bfd_byte *hit_data = contents + offset; | |
264 | ||
265 | switch (r_type) | |
266 | { | |
267 | ||
268 | case R_MN10200_NONE: | |
269 | return bfd_reloc_ok; | |
270 | ||
271 | case R_MN10200_32: | |
272 | value += addend; | |
273 | bfd_put_32 (input_bfd, value, hit_data); | |
274 | return bfd_reloc_ok; | |
275 | ||
276 | case R_MN10200_16: | |
277 | value += addend; | |
278 | ||
27def10f | 279 | if ((long) value > 0x7fff || (long) value < -0x8000) |
252b5132 RH |
280 | return bfd_reloc_overflow; |
281 | ||
282 | bfd_put_16 (input_bfd, value, hit_data); | |
283 | return bfd_reloc_ok; | |
284 | ||
285 | case R_MN10200_8: | |
286 | value += addend; | |
287 | ||
27def10f | 288 | if ((long) value > 0x7f || (long) value < -0x80) |
252b5132 RH |
289 | return bfd_reloc_overflow; |
290 | ||
291 | bfd_put_8 (input_bfd, value, hit_data); | |
292 | return bfd_reloc_ok; | |
293 | ||
294 | case R_MN10200_24: | |
295 | value += addend; | |
296 | ||
27def10f | 297 | if ((long) value > 0x7fffff || (long) value < -0x800000) |
252b5132 RH |
298 | return bfd_reloc_overflow; |
299 | ||
300 | value &= 0xffffff; | |
301 | value |= (bfd_get_32 (input_bfd, hit_data) & 0xff000000); | |
302 | bfd_put_32 (input_bfd, value, hit_data); | |
303 | return bfd_reloc_ok; | |
304 | ||
305 | case R_MN10200_PCREL8: | |
306 | value -= (input_section->output_section->vma | |
307 | + input_section->output_offset); | |
308 | value -= (offset + 1); | |
309 | value += addend; | |
310 | ||
27def10f KH |
311 | if ((long) value > 0xff || (long) value < -0x100) |
312 | return bfd_reloc_overflow; | |
252b5132 RH |
313 | |
314 | bfd_put_8 (input_bfd, value, hit_data); | |
315 | return bfd_reloc_ok; | |
316 | ||
317 | case R_MN10200_PCREL16: | |
318 | value -= (input_section->output_section->vma | |
319 | + input_section->output_offset); | |
320 | value -= (offset + 2); | |
321 | value += addend; | |
322 | ||
27def10f KH |
323 | if ((long) value > 0xffff || (long) value < -0x10000) |
324 | return bfd_reloc_overflow; | |
252b5132 RH |
325 | |
326 | bfd_put_16 (input_bfd, value, hit_data); | |
327 | return bfd_reloc_ok; | |
328 | ||
329 | case R_MN10200_PCREL24: | |
330 | value -= (input_section->output_section->vma | |
331 | + input_section->output_offset); | |
332 | value -= (offset + 3); | |
333 | value += addend; | |
334 | ||
27def10f KH |
335 | if ((long) value > 0xffffff || (long) value < -0x1000000) |
336 | return bfd_reloc_overflow; | |
252b5132 RH |
337 | |
338 | value &= 0xffffff; | |
339 | value |= (bfd_get_32 (input_bfd, hit_data) & 0xff000000); | |
340 | bfd_put_32 (input_bfd, value, hit_data); | |
341 | return bfd_reloc_ok; | |
342 | ||
343 | default: | |
344 | return bfd_reloc_notsupported; | |
345 | } | |
346 | } | |
252b5132 RH |
347 | \f |
348 | /* Relocate an MN10200 ELF section. */ | |
b34976b6 | 349 | static bfd_boolean |
252b5132 RH |
350 | mn10200_elf_relocate_section (output_bfd, info, input_bfd, input_section, |
351 | contents, relocs, local_syms, local_sections) | |
352 | bfd *output_bfd; | |
353 | struct bfd_link_info *info; | |
354 | bfd *input_bfd; | |
355 | asection *input_section; | |
356 | bfd_byte *contents; | |
357 | Elf_Internal_Rela *relocs; | |
358 | Elf_Internal_Sym *local_syms; | |
359 | asection **local_sections; | |
360 | { | |
361 | Elf_Internal_Shdr *symtab_hdr; | |
362 | struct elf_link_hash_entry **sym_hashes; | |
363 | Elf_Internal_Rela *rel, *relend; | |
364 | ||
365 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
366 | sym_hashes = elf_sym_hashes (input_bfd); | |
367 | ||
368 | rel = relocs; | |
369 | relend = relocs + input_section->reloc_count; | |
370 | for (; rel < relend; rel++) | |
371 | { | |
372 | int r_type; | |
373 | reloc_howto_type *howto; | |
374 | unsigned long r_symndx; | |
375 | Elf_Internal_Sym *sym; | |
376 | asection *sec; | |
377 | struct elf_link_hash_entry *h; | |
378 | bfd_vma relocation; | |
379 | bfd_reloc_status_type r; | |
380 | ||
381 | r_symndx = ELF32_R_SYM (rel->r_info); | |
382 | r_type = ELF32_R_TYPE (rel->r_info); | |
383 | howto = elf_mn10200_howto_table + r_type; | |
384 | ||
252b5132 RH |
385 | h = NULL; |
386 | sym = NULL; | |
387 | sec = NULL; | |
388 | if (r_symndx < symtab_hdr->sh_info) | |
389 | { | |
390 | sym = local_syms + r_symndx; | |
391 | sec = local_sections[r_symndx]; | |
8517fae7 | 392 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
252b5132 RH |
393 | } |
394 | else | |
395 | { | |
59c2e50f L |
396 | bfd_boolean unresolved_reloc, warned; |
397 | ||
b2a8e766 AM |
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); | |
252b5132 RH |
402 | } |
403 | ||
ab96bf03 AM |
404 | if (sec != NULL && elf_discarded_section (sec)) |
405 | { | |
406 | /* For relocs against symbols from removed linkonce sections, | |
407 | or sections discarded by a linker script, we just want the | |
408 | section contents zeroed. Avoid any special processing. */ | |
409 | _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset); | |
410 | rel->r_info = 0; | |
411 | rel->r_addend = 0; | |
412 | continue; | |
413 | } | |
414 | ||
415 | if (info->relocatable) | |
416 | continue; | |
417 | ||
252b5132 RH |
418 | r = mn10200_elf_final_link_relocate (howto, input_bfd, output_bfd, |
419 | input_section, | |
420 | contents, rel->r_offset, | |
421 | relocation, rel->r_addend, | |
422 | info, sec, h == NULL); | |
423 | ||
424 | if (r != bfd_reloc_ok) | |
425 | { | |
426 | const char *name; | |
27def10f | 427 | const char *msg = (const char *) 0; |
252b5132 RH |
428 | |
429 | if (h != NULL) | |
430 | name = h->root.root.string; | |
431 | else | |
432 | { | |
433 | name = (bfd_elf_string_from_elf_section | |
434 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); | |
435 | if (name == NULL || *name == '\0') | |
436 | name = bfd_section_name (input_bfd, sec); | |
437 | } | |
438 | ||
439 | switch (r) | |
440 | { | |
441 | case bfd_reloc_overflow: | |
442 | if (! ((*info->callbacks->reloc_overflow) | |
dfeffb9f L |
443 | (info, (h ? &h->root : NULL), name, howto->name, |
444 | (bfd_vma) 0, input_bfd, input_section, | |
445 | rel->r_offset))) | |
b34976b6 | 446 | return FALSE; |
252b5132 RH |
447 | break; |
448 | ||
449 | case bfd_reloc_undefined: | |
450 | if (! ((*info->callbacks->undefined_symbol) | |
451 | (info, name, input_bfd, input_section, | |
b34976b6 AM |
452 | rel->r_offset, TRUE))) |
453 | return FALSE; | |
252b5132 RH |
454 | break; |
455 | ||
456 | case bfd_reloc_outofrange: | |
457 | msg = _("internal error: out of range error"); | |
458 | goto common_error; | |
459 | ||
460 | case bfd_reloc_notsupported: | |
461 | msg = _("internal error: unsupported relocation error"); | |
462 | goto common_error; | |
463 | ||
464 | case bfd_reloc_dangerous: | |
465 | msg = _("internal error: dangerous error"); | |
466 | goto common_error; | |
467 | ||
468 | default: | |
469 | msg = _("internal error: unknown error"); | |
470 | /* fall through */ | |
471 | ||
472 | common_error: | |
473 | if (!((*info->callbacks->warning) | |
474 | (info, msg, name, input_bfd, input_section, | |
475 | rel->r_offset))) | |
b34976b6 | 476 | return FALSE; |
252b5132 RH |
477 | break; |
478 | } | |
479 | } | |
480 | } | |
481 | ||
b34976b6 | 482 | return TRUE; |
252b5132 RH |
483 | } |
484 | ||
485 | /* This function handles relaxing for the mn10200. | |
486 | ||
4cc11e76 | 487 | There are quite a few relaxing opportunities available on the mn10200: |
252b5132 RH |
488 | |
489 | * jsr:24 -> jsr:16 2 bytes | |
490 | ||
491 | * jmp:24 -> jmp:16 2 bytes | |
492 | * jmp:16 -> bra:8 1 byte | |
493 | ||
494 | * If the previous instruction is a conditional branch | |
495 | around the jump/bra, we may be able to reverse its condition | |
496 | and change its target to the jump's target. The jump/bra | |
497 | can then be deleted. 2 bytes | |
498 | ||
499 | * mov abs24 -> mov abs16 2 byte savings | |
500 | ||
501 | * Most instructions which accept imm24 can relax to imm16 2 bytes | |
502 | - Most instructions which accept imm16 can relax to imm8 1 byte | |
503 | ||
504 | * Most instructions which accept d24 can relax to d16 2 bytes | |
505 | - Most instructions which accept d16 can relax to d8 1 byte | |
506 | ||
507 | abs24, imm24, d24 all look the same at the reloc level. It | |
508 | might make the code simpler if we had different relocs for | |
509 | the various relaxable operand types. | |
a7c10850 | 510 | |
252b5132 RH |
511 | We don't handle imm16->imm8 or d16->d8 as they're very rare |
512 | and somewhat more difficult to support. */ | |
513 | ||
b34976b6 | 514 | static bfd_boolean |
252b5132 RH |
515 | mn10200_elf_relax_section (abfd, sec, link_info, again) |
516 | bfd *abfd; | |
517 | asection *sec; | |
518 | struct bfd_link_info *link_info; | |
b34976b6 | 519 | bfd_boolean *again; |
252b5132 RH |
520 | { |
521 | Elf_Internal_Shdr *symtab_hdr; | |
522 | Elf_Internal_Rela *internal_relocs; | |
252b5132 RH |
523 | Elf_Internal_Rela *irel, *irelend; |
524 | bfd_byte *contents = NULL; | |
6cdc0ccc | 525 | Elf_Internal_Sym *isymbuf = NULL; |
252b5132 RH |
526 | |
527 | /* Assume nothing changes. */ | |
b34976b6 | 528 | *again = FALSE; |
252b5132 | 529 | |
1049f94e | 530 | /* We don't have to do anything for a relocatable link, if |
252b5132 RH |
531 | this section does not have relocs, or if this is not a |
532 | code section. */ | |
1049f94e | 533 | if (link_info->relocatable |
252b5132 RH |
534 | || (sec->flags & SEC_RELOC) == 0 |
535 | || sec->reloc_count == 0 | |
536 | || (sec->flags & SEC_CODE) == 0) | |
b34976b6 | 537 | return TRUE; |
252b5132 | 538 | |
252b5132 RH |
539 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
540 | ||
541 | /* Get a copy of the native relocations. */ | |
45d6a902 | 542 | internal_relocs = (_bfd_elf_link_read_relocs |
252b5132 RH |
543 | (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL, |
544 | link_info->keep_memory)); | |
545 | if (internal_relocs == NULL) | |
546 | goto error_return; | |
252b5132 RH |
547 | |
548 | /* Walk through them looking for relaxing opportunities. */ | |
549 | irelend = internal_relocs + sec->reloc_count; | |
550 | for (irel = internal_relocs; irel < irelend; irel++) | |
551 | { | |
552 | bfd_vma symval; | |
553 | ||
554 | /* If this isn't something that can be relaxed, then ignore | |
555 | this reloc. */ | |
556 | if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10200_NONE | |
557 | || ELF32_R_TYPE (irel->r_info) == (int) R_MN10200_8 | |
558 | || ELF32_R_TYPE (irel->r_info) == (int) R_MN10200_MAX) | |
559 | continue; | |
560 | ||
561 | /* Get the section contents if we haven't done so already. */ | |
562 | if (contents == NULL) | |
563 | { | |
564 | /* Get cached copy if it exists. */ | |
565 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
566 | contents = elf_section_data (sec)->this_hdr.contents; | |
567 | else | |
568 | { | |
569 | /* Go get them off disk. */ | |
eea6121a | 570 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) |
252b5132 RH |
571 | goto error_return; |
572 | } | |
573 | } | |
574 | ||
6cdc0ccc AM |
575 | /* Read this BFD's local symbols if we haven't done so already. */ |
576 | if (isymbuf == NULL && symtab_hdr->sh_info != 0) | |
252b5132 | 577 | { |
6cdc0ccc AM |
578 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
579 | if (isymbuf == NULL) | |
580 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
581 | symtab_hdr->sh_info, 0, | |
582 | NULL, NULL, NULL); | |
583 | if (isymbuf == NULL) | |
584 | goto error_return; | |
252b5132 RH |
585 | } |
586 | ||
587 | /* Get the value of the symbol referred to by the reloc. */ | |
588 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) | |
589 | { | |
9ad5cbcf | 590 | /* A local symbol. */ |
6cdc0ccc | 591 | Elf_Internal_Sym *isym; |
252b5132 RH |
592 | asection *sym_sec; |
593 | ||
6cdc0ccc AM |
594 | isym = isymbuf + ELF32_R_SYM (irel->r_info); |
595 | if (isym->st_shndx == SHN_UNDEF) | |
9ad5cbcf | 596 | sym_sec = bfd_und_section_ptr; |
6cdc0ccc | 597 | else if (isym->st_shndx == SHN_ABS) |
9ad5cbcf | 598 | sym_sec = bfd_abs_section_ptr; |
6cdc0ccc | 599 | else if (isym->st_shndx == SHN_COMMON) |
9ad5cbcf AM |
600 | sym_sec = bfd_com_section_ptr; |
601 | else | |
6cdc0ccc AM |
602 | sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); |
603 | symval = (isym->st_value | |
252b5132 RH |
604 | + sym_sec->output_section->vma |
605 | + sym_sec->output_offset); | |
606 | } | |
607 | else | |
608 | { | |
609 | unsigned long indx; | |
610 | struct elf_link_hash_entry *h; | |
611 | ||
612 | /* An external symbol. */ | |
613 | indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; | |
614 | h = elf_sym_hashes (abfd)[indx]; | |
615 | BFD_ASSERT (h != NULL); | |
616 | if (h->root.type != bfd_link_hash_defined | |
617 | && h->root.type != bfd_link_hash_defweak) | |
618 | { | |
619 | /* This appears to be a reference to an undefined | |
620 | symbol. Just ignore it--it will be caught by the | |
621 | regular reloc processing. */ | |
622 | continue; | |
623 | } | |
624 | ||
625 | symval = (h->root.u.def.value | |
626 | + h->root.u.def.section->output_section->vma | |
627 | + h->root.u.def.section->output_offset); | |
628 | } | |
629 | ||
630 | /* For simplicity of coding, we are going to modify the section | |
631 | contents, the section relocs, and the BFD symbol table. We | |
632 | must tell the rest of the code not to free up this | |
633 | information. It would be possible to instead create a table | |
634 | of changes which have to be made, as is done in coff-mips.c; | |
635 | that would be more work, but would require less memory when | |
636 | the linker is run. */ | |
637 | ||
252b5132 RH |
638 | /* Try to turn a 24bit pc-relative branch/call into a 16bit pc-relative |
639 | branch/call. */ | |
640 | if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10200_PCREL24) | |
641 | { | |
642 | bfd_vma value = symval; | |
643 | ||
644 | /* Deal with pc-relative gunk. */ | |
645 | value -= (sec->output_section->vma + sec->output_offset); | |
646 | value -= (irel->r_offset + 3); | |
647 | value += irel->r_addend; | |
648 | ||
649 | /* See if the value will fit in 16 bits, note the high value is | |
650 | 0x7fff + 2 as the target will be two bytes closer if we are | |
651 | able to relax. */ | |
27def10f | 652 | if ((long) value < 0x8001 && (long) value > -0x8000) |
252b5132 RH |
653 | { |
654 | unsigned char code; | |
655 | ||
656 | /* Get the opcode. */ | |
657 | code = bfd_get_8 (abfd, contents + irel->r_offset - 1); | |
658 | ||
659 | if (code != 0xe0 && code != 0xe1) | |
660 | continue; | |
661 | ||
662 | /* Note that we've changed the relocs, section contents, etc. */ | |
663 | elf_section_data (sec)->relocs = internal_relocs; | |
252b5132 | 664 | elf_section_data (sec)->this_hdr.contents = contents; |
6cdc0ccc | 665 | symtab_hdr->contents = (unsigned char *) isymbuf; |
252b5132 RH |
666 | |
667 | /* Fix the opcode. */ | |
668 | if (code == 0xe0) | |
669 | bfd_put_8 (abfd, 0xfc, contents + irel->r_offset - 2); | |
670 | else if (code == 0xe1) | |
671 | bfd_put_8 (abfd, 0xfd, contents + irel->r_offset - 2); | |
672 | ||
673 | /* Fix the relocation's type. */ | |
674 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
675 | R_MN10200_PCREL16); | |
676 | ||
677 | /* The opcode got shorter too, so we have to fix the offset. */ | |
678 | irel->r_offset -= 1; | |
679 | ||
680 | /* Delete two bytes of data. */ | |
681 | if (!mn10200_elf_relax_delete_bytes (abfd, sec, | |
682 | irel->r_offset + 1, 2)) | |
683 | goto error_return; | |
684 | ||
685 | /* That will change things, so, we should relax again. | |
686 | Note that this is not required, and it may be slow. */ | |
b34976b6 | 687 | *again = TRUE; |
252b5132 RH |
688 | } |
689 | } | |
690 | ||
691 | /* Try to turn a 16bit pc-relative branch into a 8bit pc-relative | |
692 | branch. */ | |
693 | if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10200_PCREL16) | |
694 | { | |
695 | bfd_vma value = symval; | |
696 | ||
697 | /* Deal with pc-relative gunk. */ | |
698 | value -= (sec->output_section->vma + sec->output_offset); | |
699 | value -= (irel->r_offset + 2); | |
700 | value += irel->r_addend; | |
701 | ||
702 | /* See if the value will fit in 8 bits, note the high value is | |
703 | 0x7f + 1 as the target will be one bytes closer if we are | |
704 | able to relax. */ | |
27def10f | 705 | if ((long) value < 0x80 && (long) value > -0x80) |
252b5132 RH |
706 | { |
707 | unsigned char code; | |
708 | ||
709 | /* Get the opcode. */ | |
710 | code = bfd_get_8 (abfd, contents + irel->r_offset - 1); | |
711 | ||
712 | if (code != 0xfc) | |
713 | continue; | |
714 | ||
715 | /* Note that we've changed the relocs, section contents, etc. */ | |
716 | elf_section_data (sec)->relocs = internal_relocs; | |
252b5132 | 717 | elf_section_data (sec)->this_hdr.contents = contents; |
6cdc0ccc | 718 | symtab_hdr->contents = (unsigned char *) isymbuf; |
252b5132 RH |
719 | |
720 | /* Fix the opcode. */ | |
721 | bfd_put_8 (abfd, 0xea, contents + irel->r_offset - 1); | |
722 | ||
723 | /* Fix the relocation's type. */ | |
724 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
725 | R_MN10200_PCREL8); | |
726 | ||
727 | /* Delete one byte of data. */ | |
728 | if (!mn10200_elf_relax_delete_bytes (abfd, sec, | |
729 | irel->r_offset + 1, 1)) | |
730 | goto error_return; | |
731 | ||
732 | /* That will change things, so, we should relax again. | |
733 | Note that this is not required, and it may be slow. */ | |
b34976b6 | 734 | *again = TRUE; |
252b5132 RH |
735 | } |
736 | } | |
737 | ||
738 | /* Try to eliminate an unconditional 8 bit pc-relative branch | |
739 | which immediately follows a conditional 8 bit pc-relative | |
740 | branch around the unconditional branch. | |
741 | ||
742 | original: new: | |
743 | bCC lab1 bCC' lab2 | |
744 | bra lab2 | |
745 | lab1: lab1: | |
746 | ||
252b5132 RH |
747 | This happens when the bCC can't reach lab2 at assembly time, |
748 | but due to other relaxations it can reach at link time. */ | |
749 | if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10200_PCREL8) | |
750 | { | |
751 | Elf_Internal_Rela *nrel; | |
752 | bfd_vma value = symval; | |
753 | unsigned char code; | |
754 | ||
755 | /* Deal with pc-relative gunk. */ | |
756 | value -= (sec->output_section->vma + sec->output_offset); | |
757 | value -= (irel->r_offset + 1); | |
758 | value += irel->r_addend; | |
759 | ||
760 | /* Do nothing if this reloc is the last byte in the section. */ | |
eea6121a | 761 | if (irel->r_offset == sec->size) |
252b5132 RH |
762 | continue; |
763 | ||
764 | /* See if the next instruction is an unconditional pc-relative | |
765 | branch, more often than not this test will fail, so we | |
766 | test it first to speed things up. */ | |
767 | code = bfd_get_8 (abfd, contents + irel->r_offset + 1); | |
768 | if (code != 0xea) | |
769 | continue; | |
770 | ||
771 | /* Also make sure the next relocation applies to the next | |
772 | instruction and that it's a pc-relative 8 bit branch. */ | |
773 | nrel = irel + 1; | |
774 | if (nrel == irelend | |
775 | || irel->r_offset + 2 != nrel->r_offset | |
776 | || ELF32_R_TYPE (nrel->r_info) != (int) R_MN10200_PCREL8) | |
777 | continue; | |
778 | ||
779 | /* Make sure our destination immediately follows the | |
780 | unconditional branch. */ | |
781 | if (symval != (sec->output_section->vma + sec->output_offset | |
782 | + irel->r_offset + 3)) | |
783 | continue; | |
784 | ||
785 | /* Now make sure we are a conditional branch. This may not | |
a7c10850 | 786 | be necessary, but why take the chance. |
252b5132 RH |
787 | |
788 | Note these checks assume that R_MN10200_PCREL8 relocs | |
789 | only occur on bCC and bCCx insns. If they occured | |
790 | elsewhere, we'd need to know the start of this insn | |
791 | for this check to be accurate. */ | |
792 | code = bfd_get_8 (abfd, contents + irel->r_offset - 1); | |
793 | if (code != 0xe0 && code != 0xe1 && code != 0xe2 | |
794 | && code != 0xe3 && code != 0xe4 && code != 0xe5 | |
795 | && code != 0xe6 && code != 0xe7 && code != 0xe8 | |
796 | && code != 0xe9 && code != 0xec && code != 0xed | |
797 | && code != 0xee && code != 0xef && code != 0xfc | |
798 | && code != 0xfd && code != 0xfe && code != 0xff) | |
799 | continue; | |
800 | ||
801 | /* We also have to be sure there is no symbol/label | |
802 | at the unconditional branch. */ | |
6cdc0ccc AM |
803 | if (mn10200_elf_symbol_address_p (abfd, sec, isymbuf, |
804 | irel->r_offset + 1)) | |
252b5132 RH |
805 | continue; |
806 | ||
807 | /* Note that we've changed the relocs, section contents, etc. */ | |
808 | elf_section_data (sec)->relocs = internal_relocs; | |
252b5132 | 809 | elf_section_data (sec)->this_hdr.contents = contents; |
6cdc0ccc | 810 | symtab_hdr->contents = (unsigned char *) isymbuf; |
252b5132 RH |
811 | |
812 | /* Reverse the condition of the first branch. */ | |
813 | switch (code) | |
814 | { | |
27def10f KH |
815 | case 0xfc: |
816 | code = 0xfd; | |
817 | break; | |
818 | case 0xfd: | |
819 | code = 0xfc; | |
820 | break; | |
821 | case 0xfe: | |
822 | code = 0xff; | |
823 | break; | |
824 | case 0xff: | |
825 | code = 0xfe; | |
826 | break; | |
827 | case 0xe8: | |
828 | code = 0xe9; | |
829 | break; | |
830 | case 0xe9: | |
831 | code = 0xe8; | |
832 | break; | |
833 | case 0xe0: | |
834 | code = 0xe2; | |
835 | break; | |
836 | case 0xe2: | |
837 | code = 0xe0; | |
838 | break; | |
839 | case 0xe3: | |
840 | code = 0xe1; | |
841 | break; | |
842 | case 0xe1: | |
843 | code = 0xe3; | |
844 | break; | |
845 | case 0xe4: | |
846 | code = 0xe6; | |
847 | break; | |
848 | case 0xe6: | |
849 | code = 0xe4; | |
850 | break; | |
851 | case 0xe7: | |
852 | code = 0xe5; | |
853 | break; | |
854 | case 0xe5: | |
855 | code = 0xe7; | |
856 | break; | |
857 | case 0xec: | |
858 | code = 0xed; | |
859 | break; | |
860 | case 0xed: | |
861 | code = 0xec; | |
862 | break; | |
863 | case 0xee: | |
864 | code = 0xef; | |
865 | break; | |
866 | case 0xef: | |
867 | code = 0xee; | |
868 | break; | |
252b5132 RH |
869 | } |
870 | bfd_put_8 (abfd, code, contents + irel->r_offset - 1); | |
a7c10850 | 871 | |
252b5132 RH |
872 | /* Set the reloc type and symbol for the first branch |
873 | from the second branch. */ | |
874 | irel->r_info = nrel->r_info; | |
875 | ||
876 | /* Make the reloc for the second branch a null reloc. */ | |
877 | nrel->r_info = ELF32_R_INFO (ELF32_R_SYM (nrel->r_info), | |
878 | R_MN10200_NONE); | |
879 | ||
880 | /* Delete two bytes of data. */ | |
881 | if (!mn10200_elf_relax_delete_bytes (abfd, sec, | |
882 | irel->r_offset + 1, 2)) | |
883 | goto error_return; | |
884 | ||
885 | /* That will change things, so, we should relax again. | |
886 | Note that this is not required, and it may be slow. */ | |
b34976b6 | 887 | *again = TRUE; |
252b5132 RH |
888 | } |
889 | ||
890 | /* Try to turn a 24bit immediate, displacement or absolute address | |
891 | into a 16bit immediate, displacement or absolute address. */ | |
892 | if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10200_24) | |
893 | { | |
894 | bfd_vma value = symval; | |
895 | ||
a7c10850 | 896 | /* See if the value will fit in 16 bits. |
252b5132 RH |
897 | We allow any 16bit match here. We prune those we can't |
898 | handle below. */ | |
27def10f | 899 | if ((long) value < 0x7fff && (long) value > -0x8000) |
252b5132 RH |
900 | { |
901 | unsigned char code; | |
902 | ||
903 | /* All insns which have 24bit operands are 5 bytes long, | |
904 | the first byte will always be 0xf4, but we double check | |
905 | it just in case. */ | |
906 | ||
907 | /* Get the first opcode. */ | |
908 | code = bfd_get_8 (abfd, contents + irel->r_offset - 2); | |
909 | ||
910 | if (code != 0xf4) | |
911 | continue; | |
912 | ||
913 | /* Get the second opcode. */ | |
914 | code = bfd_get_8 (abfd, contents + irel->r_offset - 1); | |
915 | ||
916 | switch (code & 0xfc) | |
917 | { | |
918 | /* mov imm24,dn -> mov imm16,dn */ | |
919 | case 0x70: | |
920 | /* Not safe if the high bit is on as relaxing may | |
921 | move the value out of high mem and thus not fit | |
922 | in a signed 16bit value. */ | |
923 | if (value & 0x8000) | |
924 | continue; | |
925 | ||
4cc11e76 | 926 | /* Note that we've changed the relocation contents, etc. */ |
252b5132 | 927 | elf_section_data (sec)->relocs = internal_relocs; |
252b5132 | 928 | elf_section_data (sec)->this_hdr.contents = contents; |
6cdc0ccc | 929 | symtab_hdr->contents = (unsigned char *) isymbuf; |
252b5132 RH |
930 | |
931 | /* Fix the opcode. */ | |
932 | bfd_put_8 (abfd, 0xf8 + (code & 0x03), | |
933 | contents + irel->r_offset - 2); | |
934 | ||
935 | /* Fix the relocation's type. */ | |
936 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
937 | R_MN10200_16); | |
938 | ||
939 | /* The opcode got shorter too, so we have to fix the | |
940 | offset. */ | |
941 | irel->r_offset -= 1; | |
942 | ||
943 | /* Delete two bytes of data. */ | |
944 | if (!mn10200_elf_relax_delete_bytes (abfd, sec, | |
945 | irel->r_offset + 1, 2)) | |
946 | goto error_return; | |
947 | ||
948 | /* That will change things, so, we should relax again. | |
949 | Note that this is not required, and it may be slow. */ | |
b34976b6 | 950 | *again = TRUE; |
252b5132 RH |
951 | break; |
952 | ||
a7c10850 | 953 | /* mov imm24,an -> mov imm16,an |
252b5132 RH |
954 | cmp imm24,an -> cmp imm16,an |
955 | mov (abs24),dn -> mov (abs16),dn | |
956 | mov dn,(abs24) -> mov dn,(abs16) | |
957 | movb dn,(abs24) -> movb dn,(abs16) | |
958 | movbu (abs24),dn -> movbu (abs16),dn */ | |
959 | case 0x74: | |
960 | case 0x7c: | |
961 | case 0xc0: | |
962 | case 0x40: | |
963 | case 0x44: | |
964 | case 0xc8: | |
4cc11e76 | 965 | /* Note that we've changed the relocation contents, etc. */ |
252b5132 | 966 | elf_section_data (sec)->relocs = internal_relocs; |
252b5132 | 967 | elf_section_data (sec)->this_hdr.contents = contents; |
6cdc0ccc | 968 | symtab_hdr->contents = (unsigned char *) isymbuf; |
252b5132 RH |
969 | |
970 | if ((code & 0xfc) == 0x74) | |
971 | code = 0xdc + (code & 0x03); | |
972 | else if ((code & 0xfc) == 0x7c) | |
973 | code = 0xec + (code & 0x03); | |
974 | else if ((code & 0xfc) == 0xc0) | |
975 | code = 0xc8 + (code & 0x03); | |
976 | else if ((code & 0xfc) == 0x40) | |
977 | code = 0xc0 + (code & 0x03); | |
978 | else if ((code & 0xfc) == 0x44) | |
979 | code = 0xc4 + (code & 0x03); | |
980 | else if ((code & 0xfc) == 0xc8) | |
981 | code = 0xcc + (code & 0x03); | |
982 | ||
983 | /* Fix the opcode. */ | |
984 | bfd_put_8 (abfd, code, contents + irel->r_offset - 2); | |
985 | ||
986 | /* Fix the relocation's type. */ | |
987 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
988 | R_MN10200_16); | |
989 | ||
990 | /* The opcode got shorter too, so we have to fix the | |
991 | offset. */ | |
992 | irel->r_offset -= 1; | |
993 | ||
994 | /* Delete two bytes of data. */ | |
995 | if (!mn10200_elf_relax_delete_bytes (abfd, sec, | |
996 | irel->r_offset + 1, 2)) | |
997 | goto error_return; | |
998 | ||
999 | /* That will change things, so, we should relax again. | |
1000 | Note that this is not required, and it may be slow. */ | |
b34976b6 | 1001 | *again = TRUE; |
252b5132 RH |
1002 | break; |
1003 | ||
1004 | /* cmp imm24,dn -> cmp imm16,dn | |
1005 | mov (abs24),an -> mov (abs16),an | |
1006 | mov an,(abs24) -> mov an,(abs16) | |
1007 | add imm24,dn -> add imm16,dn | |
1008 | add imm24,an -> add imm16,an | |
1009 | sub imm24,dn -> sub imm16,dn | |
a7c10850 | 1010 | sub imm24,an -> sub imm16,an |
252b5132 RH |
1011 | And all d24->d16 in memory ops. */ |
1012 | case 0x78: | |
1013 | case 0xd0: | |
1014 | case 0x50: | |
1015 | case 0x60: | |
1016 | case 0x64: | |
1017 | case 0x68: | |
1018 | case 0x6c: | |
1019 | case 0x80: | |
1020 | case 0xf0: | |
1021 | case 0x00: | |
1022 | case 0x10: | |
1023 | case 0xb0: | |
1024 | case 0x30: | |
1025 | case 0xa0: | |
1026 | case 0x20: | |
1027 | case 0x90: | |
1028 | /* Not safe if the high bit is on as relaxing may | |
1029 | move the value out of high mem and thus not fit | |
1030 | in a signed 16bit value. */ | |
1031 | if (((code & 0xfc) == 0x78 | |
27def10f KH |
1032 | || (code & 0xfc) == 0x60 |
1033 | || (code & 0xfc) == 0x64 | |
1034 | || (code & 0xfc) == 0x68 | |
1035 | || (code & 0xfc) == 0x6c | |
1036 | || (code & 0xfc) == 0x80 | |
1037 | || (code & 0xfc) == 0xf0 | |
1038 | || (code & 0xfc) == 0x00 | |
1039 | || (code & 0xfc) == 0x10 | |
1040 | || (code & 0xfc) == 0xb0 | |
1041 | || (code & 0xfc) == 0x30 | |
1042 | || (code & 0xfc) == 0xa0 | |
1043 | || (code & 0xfc) == 0x20 | |
1044 | || (code & 0xfc) == 0x90) | |
1045 | && (value & 0x8000) != 0) | |
252b5132 RH |
1046 | continue; |
1047 | ||
4cc11e76 | 1048 | /* Note that we've changed the relocation contents, etc. */ |
252b5132 | 1049 | elf_section_data (sec)->relocs = internal_relocs; |
252b5132 | 1050 | elf_section_data (sec)->this_hdr.contents = contents; |
6cdc0ccc | 1051 | symtab_hdr->contents = (unsigned char *) isymbuf; |
252b5132 RH |
1052 | |
1053 | /* Fix the opcode. */ | |
1054 | bfd_put_8 (abfd, 0xf7, contents + irel->r_offset - 2); | |
1055 | ||
1056 | if ((code & 0xfc) == 0x78) | |
1057 | code = 0x48 + (code & 0x03); | |
1058 | else if ((code & 0xfc) == 0xd0) | |
1059 | code = 0x30 + (code & 0x03); | |
1060 | else if ((code & 0xfc) == 0x50) | |
1061 | code = 0x20 + (code & 0x03); | |
1062 | else if ((code & 0xfc) == 0x60) | |
1063 | code = 0x18 + (code & 0x03); | |
1064 | else if ((code & 0xfc) == 0x64) | |
1065 | code = 0x08 + (code & 0x03); | |
1066 | else if ((code & 0xfc) == 0x68) | |
1067 | code = 0x1c + (code & 0x03); | |
1068 | else if ((code & 0xfc) == 0x6c) | |
1069 | code = 0x0c + (code & 0x03); | |
1070 | else if ((code & 0xfc) == 0x80) | |
1071 | code = 0xc0 + (code & 0x07); | |
1072 | else if ((code & 0xfc) == 0xf0) | |
1073 | code = 0xb0 + (code & 0x07); | |
1074 | else if ((code & 0xfc) == 0x00) | |
1075 | code = 0x80 + (code & 0x07); | |
1076 | else if ((code & 0xfc) == 0x10) | |
1077 | code = 0xa0 + (code & 0x07); | |
1078 | else if ((code & 0xfc) == 0xb0) | |
1079 | code = 0x70 + (code & 0x07); | |
1080 | else if ((code & 0xfc) == 0x30) | |
1081 | code = 0x60 + (code & 0x07); | |
1082 | else if ((code & 0xfc) == 0xa0) | |
1083 | code = 0xd0 + (code & 0x07); | |
1084 | else if ((code & 0xfc) == 0x20) | |
1085 | code = 0x90 + (code & 0x07); | |
1086 | else if ((code & 0xfc) == 0x90) | |
1087 | code = 0x50 + (code & 0x07); | |
1088 | ||
1089 | bfd_put_8 (abfd, code, contents + irel->r_offset - 1); | |
1090 | ||
1091 | /* Fix the relocation's type. */ | |
1092 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
1093 | R_MN10200_16); | |
1094 | ||
1095 | /* Delete one bytes of data. */ | |
1096 | if (!mn10200_elf_relax_delete_bytes (abfd, sec, | |
1097 | irel->r_offset + 2, 1)) | |
1098 | goto error_return; | |
1099 | ||
1100 | /* That will change things, so, we should relax again. | |
1101 | Note that this is not required, and it may be slow. */ | |
b34976b6 | 1102 | *again = TRUE; |
252b5132 RH |
1103 | break; |
1104 | ||
1105 | /* movb (abs24),dn ->movbu (abs16),dn extxb bn */ | |
1106 | case 0xc4: | |
1107 | /* Note that we've changed the reldection contents, etc. */ | |
1108 | elf_section_data (sec)->relocs = internal_relocs; | |
252b5132 | 1109 | elf_section_data (sec)->this_hdr.contents = contents; |
6cdc0ccc | 1110 | symtab_hdr->contents = (unsigned char *) isymbuf; |
252b5132 RH |
1111 | |
1112 | bfd_put_8 (abfd, 0xcc + (code & 0x03), | |
1113 | contents + irel->r_offset - 2); | |
1114 | ||
1115 | bfd_put_8 (abfd, 0xb8 + (code & 0x03), | |
1116 | contents + irel->r_offset - 1); | |
1117 | ||
1118 | /* Fix the relocation's type. */ | |
1119 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
1120 | R_MN10200_16); | |
1121 | ||
1122 | /* The reloc will be applied one byte in front of its | |
1123 | current location. */ | |
1124 | irel->r_offset -= 1; | |
1125 | ||
1126 | /* Delete one bytes of data. */ | |
1127 | if (!mn10200_elf_relax_delete_bytes (abfd, sec, | |
1128 | irel->r_offset + 2, 1)) | |
1129 | goto error_return; | |
1130 | ||
1131 | /* That will change things, so, we should relax again. | |
1132 | Note that this is not required, and it may be slow. */ | |
b34976b6 | 1133 | *again = TRUE; |
252b5132 RH |
1134 | break; |
1135 | } | |
1136 | } | |
1137 | } | |
1138 | } | |
1139 | ||
6cdc0ccc AM |
1140 | if (isymbuf != NULL |
1141 | && symtab_hdr->contents != (unsigned char *) isymbuf) | |
252b5132 RH |
1142 | { |
1143 | if (! link_info->keep_memory) | |
6cdc0ccc | 1144 | free (isymbuf); |
252b5132 RH |
1145 | else |
1146 | { | |
6cdc0ccc AM |
1147 | /* Cache the symbols for elf_link_input_bfd. */ |
1148 | symtab_hdr->contents = (unsigned char *) isymbuf; | |
252b5132 | 1149 | } |
9ad5cbcf AM |
1150 | } |
1151 | ||
6cdc0ccc AM |
1152 | if (contents != NULL |
1153 | && elf_section_data (sec)->this_hdr.contents != contents) | |
252b5132 RH |
1154 | { |
1155 | if (! link_info->keep_memory) | |
6cdc0ccc AM |
1156 | free (contents); |
1157 | else | |
252b5132 | 1158 | { |
6cdc0ccc AM |
1159 | /* Cache the section contents for elf_link_input_bfd. */ |
1160 | elf_section_data (sec)->this_hdr.contents = contents; | |
252b5132 | 1161 | } |
252b5132 RH |
1162 | } |
1163 | ||
6cdc0ccc AM |
1164 | if (internal_relocs != NULL |
1165 | && elf_section_data (sec)->relocs != internal_relocs) | |
1166 | free (internal_relocs); | |
1167 | ||
b34976b6 | 1168 | return TRUE; |
252b5132 RH |
1169 | |
1170 | error_return: | |
6cdc0ccc AM |
1171 | if (isymbuf != NULL |
1172 | && symtab_hdr->contents != (unsigned char *) isymbuf) | |
1173 | free (isymbuf); | |
1174 | if (contents != NULL | |
1175 | && elf_section_data (sec)->this_hdr.contents != contents) | |
1176 | free (contents); | |
1177 | if (internal_relocs != NULL | |
1178 | && elf_section_data (sec)->relocs != internal_relocs) | |
1179 | free (internal_relocs); | |
9ad5cbcf | 1180 | |
b34976b6 | 1181 | return FALSE; |
252b5132 RH |
1182 | } |
1183 | ||
1184 | /* Delete some bytes from a section while relaxing. */ | |
1185 | ||
b34976b6 | 1186 | static bfd_boolean |
252b5132 RH |
1187 | mn10200_elf_relax_delete_bytes (abfd, sec, addr, count) |
1188 | bfd *abfd; | |
1189 | asection *sec; | |
1190 | bfd_vma addr; | |
1191 | int count; | |
1192 | { | |
1193 | Elf_Internal_Shdr *symtab_hdr; | |
9ad5cbcf | 1194 | unsigned int sec_shndx; |
252b5132 RH |
1195 | bfd_byte *contents; |
1196 | Elf_Internal_Rela *irel, *irelend; | |
252b5132 | 1197 | bfd_vma toaddr; |
6cdc0ccc AM |
1198 | Elf_Internal_Sym *isym; |
1199 | Elf_Internal_Sym *isymend; | |
9ad5cbcf AM |
1200 | struct elf_link_hash_entry **sym_hashes; |
1201 | struct elf_link_hash_entry **end_hashes; | |
1202 | unsigned int symcount; | |
252b5132 | 1203 | |
9ad5cbcf | 1204 | sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); |
252b5132 RH |
1205 | |
1206 | contents = elf_section_data (sec)->this_hdr.contents; | |
1207 | ||
eea6121a | 1208 | toaddr = sec->size; |
252b5132 RH |
1209 | |
1210 | irel = elf_section_data (sec)->relocs; | |
1211 | irelend = irel + sec->reloc_count; | |
1212 | ||
1213 | /* Actually delete the bytes. */ | |
dc810e39 AM |
1214 | memmove (contents + addr, contents + addr + count, |
1215 | (size_t) (toaddr - addr - count)); | |
eea6121a | 1216 | sec->size -= count; |
252b5132 RH |
1217 | |
1218 | /* Adjust all the relocs. */ | |
1219 | for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++) | |
1220 | { | |
1221 | /* Get the new reloc address. */ | |
1222 | if ((irel->r_offset > addr | |
1223 | && irel->r_offset < toaddr)) | |
1224 | irel->r_offset -= count; | |
1225 | } | |
1226 | ||
1227 | /* Adjust the local symbols defined in this section. */ | |
6cdc0ccc AM |
1228 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
1229 | isym = (Elf_Internal_Sym *) symtab_hdr->contents; | |
1230 | for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++) | |
252b5132 | 1231 | { |
6cdc0ccc AM |
1232 | if (isym->st_shndx == sec_shndx |
1233 | && isym->st_value > addr | |
1234 | && isym->st_value < toaddr) | |
1235 | isym->st_value -= count; | |
252b5132 RH |
1236 | } |
1237 | ||
1238 | /* Now adjust the global symbols defined in this section. */ | |
9ad5cbcf AM |
1239 | symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) |
1240 | - symtab_hdr->sh_info); | |
1241 | sym_hashes = elf_sym_hashes (abfd); | |
1242 | end_hashes = sym_hashes + symcount; | |
1243 | for (; sym_hashes < end_hashes; sym_hashes++) | |
252b5132 | 1244 | { |
9ad5cbcf AM |
1245 | struct elf_link_hash_entry *sym_hash = *sym_hashes; |
1246 | if ((sym_hash->root.type == bfd_link_hash_defined | |
1247 | || sym_hash->root.type == bfd_link_hash_defweak) | |
1248 | && sym_hash->root.u.def.section == sec | |
1249 | && sym_hash->root.u.def.value > addr | |
1250 | && sym_hash->root.u.def.value < toaddr) | |
252b5132 | 1251 | { |
9ad5cbcf | 1252 | sym_hash->root.u.def.value -= count; |
252b5132 RH |
1253 | } |
1254 | } | |
1255 | ||
b34976b6 | 1256 | return TRUE; |
252b5132 RH |
1257 | } |
1258 | ||
b34976b6 AM |
1259 | /* Return TRUE if a symbol exists at the given address, else return |
1260 | FALSE. */ | |
1261 | static bfd_boolean | |
6cdc0ccc | 1262 | mn10200_elf_symbol_address_p (abfd, sec, isym, addr) |
252b5132 RH |
1263 | bfd *abfd; |
1264 | asection *sec; | |
6cdc0ccc | 1265 | Elf_Internal_Sym *isym; |
252b5132 RH |
1266 | bfd_vma addr; |
1267 | { | |
1268 | Elf_Internal_Shdr *symtab_hdr; | |
9ad5cbcf | 1269 | unsigned int sec_shndx; |
6cdc0ccc | 1270 | Elf_Internal_Sym *isymend; |
9ad5cbcf AM |
1271 | struct elf_link_hash_entry **sym_hashes; |
1272 | struct elf_link_hash_entry **end_hashes; | |
1273 | unsigned int symcount; | |
252b5132 | 1274 | |
9ad5cbcf | 1275 | sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); |
252b5132 | 1276 | |
6cdc0ccc | 1277 | /* Examine all the local symbols. */ |
9ad5cbcf | 1278 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
6cdc0ccc | 1279 | for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++) |
252b5132 | 1280 | { |
6cdc0ccc AM |
1281 | if (isym->st_shndx == sec_shndx |
1282 | && isym->st_value == addr) | |
b34976b6 | 1283 | return TRUE; |
252b5132 RH |
1284 | } |
1285 | ||
9ad5cbcf AM |
1286 | symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) |
1287 | - symtab_hdr->sh_info); | |
1288 | sym_hashes = elf_sym_hashes (abfd); | |
1289 | end_hashes = sym_hashes + symcount; | |
1290 | for (; sym_hashes < end_hashes; sym_hashes++) | |
252b5132 | 1291 | { |
9ad5cbcf AM |
1292 | struct elf_link_hash_entry *sym_hash = *sym_hashes; |
1293 | if ((sym_hash->root.type == bfd_link_hash_defined | |
1294 | || sym_hash->root.type == bfd_link_hash_defweak) | |
1295 | && sym_hash->root.u.def.section == sec | |
1296 | && sym_hash->root.u.def.value == addr) | |
b34976b6 | 1297 | return TRUE; |
252b5132 | 1298 | } |
9ad5cbcf | 1299 | |
b34976b6 | 1300 | return FALSE; |
252b5132 RH |
1301 | } |
1302 | ||
1303 | /* This is a version of bfd_generic_get_relocated_section_contents | |
1304 | which uses mn10200_elf_relocate_section. */ | |
1305 | ||
1306 | static bfd_byte * | |
1307 | mn10200_elf_get_relocated_section_contents (output_bfd, link_info, link_order, | |
1049f94e | 1308 | data, relocatable, symbols) |
252b5132 RH |
1309 | bfd *output_bfd; |
1310 | struct bfd_link_info *link_info; | |
1311 | struct bfd_link_order *link_order; | |
1312 | bfd_byte *data; | |
1049f94e | 1313 | bfd_boolean relocatable; |
252b5132 RH |
1314 | asymbol **symbols; |
1315 | { | |
1316 | Elf_Internal_Shdr *symtab_hdr; | |
1317 | asection *input_section = link_order->u.indirect.section; | |
1318 | bfd *input_bfd = input_section->owner; | |
1319 | asection **sections = NULL; | |
1320 | Elf_Internal_Rela *internal_relocs = NULL; | |
6cdc0ccc | 1321 | Elf_Internal_Sym *isymbuf = NULL; |
252b5132 RH |
1322 | |
1323 | /* We only need to handle the case of relaxing, or of having a | |
1324 | particular set of section contents, specially. */ | |
1049f94e | 1325 | if (relocatable |
252b5132 RH |
1326 | || elf_section_data (input_section)->this_hdr.contents == NULL) |
1327 | return bfd_generic_get_relocated_section_contents (output_bfd, link_info, | |
1328 | link_order, data, | |
1049f94e | 1329 | relocatable, |
252b5132 RH |
1330 | symbols); |
1331 | ||
1332 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
1333 | ||
1334 | memcpy (data, elf_section_data (input_section)->this_hdr.contents, | |
eea6121a | 1335 | (size_t) input_section->size); |
252b5132 RH |
1336 | |
1337 | if ((input_section->flags & SEC_RELOC) != 0 | |
1338 | && input_section->reloc_count > 0) | |
1339 | { | |
6cdc0ccc AM |
1340 | Elf_Internal_Sym *isym; |
1341 | Elf_Internal_Sym *isymend; | |
252b5132 | 1342 | asection **secpp; |
9ad5cbcf | 1343 | bfd_size_type amt; |
252b5132 | 1344 | |
45d6a902 | 1345 | internal_relocs = (_bfd_elf_link_read_relocs |
252b5132 | 1346 | (input_bfd, input_section, (PTR) NULL, |
b34976b6 | 1347 | (Elf_Internal_Rela *) NULL, FALSE)); |
252b5132 RH |
1348 | if (internal_relocs == NULL) |
1349 | goto error_return; | |
1350 | ||
6cdc0ccc AM |
1351 | if (symtab_hdr->sh_info != 0) |
1352 | { | |
1353 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
1354 | if (isymbuf == NULL) | |
1355 | isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, | |
1356 | symtab_hdr->sh_info, 0, | |
1357 | NULL, NULL, NULL); | |
1358 | if (isymbuf == NULL) | |
1359 | goto error_return; | |
1360 | } | |
252b5132 | 1361 | |
9ad5cbcf AM |
1362 | amt = symtab_hdr->sh_info; |
1363 | amt *= sizeof (asection *); | |
1364 | sections = (asection **) bfd_malloc (amt); | |
1365 | if (sections == NULL && amt != 0) | |
252b5132 RH |
1366 | goto error_return; |
1367 | ||
6cdc0ccc AM |
1368 | isymend = isymbuf + symtab_hdr->sh_info; |
1369 | for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp) | |
252b5132 RH |
1370 | { |
1371 | asection *isec; | |
1372 | ||
6cdc0ccc | 1373 | if (isym->st_shndx == SHN_UNDEF) |
252b5132 | 1374 | isec = bfd_und_section_ptr; |
6cdc0ccc | 1375 | else if (isym->st_shndx == SHN_ABS) |
252b5132 | 1376 | isec = bfd_abs_section_ptr; |
6cdc0ccc | 1377 | else if (isym->st_shndx == SHN_COMMON) |
252b5132 RH |
1378 | isec = bfd_com_section_ptr; |
1379 | else | |
6cdc0ccc | 1380 | isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx); |
252b5132 RH |
1381 | |
1382 | *secpp = isec; | |
1383 | } | |
1384 | ||
1385 | if (! mn10200_elf_relocate_section (output_bfd, link_info, input_bfd, | |
1386 | input_section, data, internal_relocs, | |
6cdc0ccc | 1387 | isymbuf, sections)) |
252b5132 RH |
1388 | goto error_return; |
1389 | ||
1390 | if (sections != NULL) | |
1391 | free (sections); | |
6cdc0ccc AM |
1392 | if (isymbuf != NULL |
1393 | && symtab_hdr->contents != (unsigned char *) isymbuf) | |
1394 | free (isymbuf); | |
1395 | if (elf_section_data (input_section)->relocs != internal_relocs) | |
252b5132 | 1396 | free (internal_relocs); |
252b5132 RH |
1397 | } |
1398 | ||
1399 | return data; | |
1400 | ||
1401 | error_return: | |
252b5132 RH |
1402 | if (sections != NULL) |
1403 | free (sections); | |
6cdc0ccc AM |
1404 | if (isymbuf != NULL |
1405 | && symtab_hdr->contents != (unsigned char *) isymbuf) | |
1406 | free (isymbuf); | |
1407 | if (internal_relocs != NULL | |
1408 | && elf_section_data (input_section)->relocs != internal_relocs) | |
1409 | free (internal_relocs); | |
252b5132 RH |
1410 | return NULL; |
1411 | } | |
1412 | ||
252b5132 RH |
1413 | #define TARGET_LITTLE_SYM bfd_elf32_mn10200_vec |
1414 | #define TARGET_LITTLE_NAME "elf32-mn10200" | |
1415 | #define ELF_ARCH bfd_arch_mn10200 | |
aa4f99bb AO |
1416 | #define ELF_MACHINE_CODE EM_MN10200 |
1417 | #define ELF_MACHINE_ALT1 EM_CYGNUS_MN10200 | |
252b5132 RH |
1418 | #define ELF_MAXPAGESIZE 0x1000 |
1419 | ||
b491616a | 1420 | #define elf_backend_rela_normal 1 |
252b5132 RH |
1421 | #define elf_info_to_howto mn10200_info_to_howto |
1422 | #define elf_info_to_howto_rel 0 | |
1423 | #define elf_backend_relocate_section mn10200_elf_relocate_section | |
1424 | #define bfd_elf32_bfd_relax_section mn10200_elf_relax_section | |
1425 | #define bfd_elf32_bfd_get_relocated_section_contents \ | |
1426 | mn10200_elf_get_relocated_section_contents | |
1427 | ||
1428 | #define elf_symbol_leading_char '_' | |
1429 | ||
1430 | #include "elf32-target.h" |