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46dd0622 | 1 | /* BFD back-end for Hitachi Super-H COFF binaries. |
51fbf454 | 2 | Copyright 1993, 1994, 1995 Free Software Foundation, Inc. |
46dd0622 SC |
3 | Contributed by Cygnus Support. |
4 | Written by Steve Chamberlain, <[email protected]>. | |
5 | ||
6 | This file is part of BFD, the Binary File Descriptor library. | |
7 | ||
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 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
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. | |
17 | ||
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 | |
e0981b9b | 20 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
46dd0622 SC |
21 | |
22 | #include "bfd.h" | |
23 | #include "sysdep.h" | |
46dd0622 | 24 | #include "obstack.h" |
6812b607 ILT |
25 | #include "libbfd.h" |
26 | #include "bfdlink.h" | |
46dd0622 SC |
27 | #include "coff/sh.h" |
28 | #include "coff/internal.h" | |
29 | #include "libcoff.h" | |
46dd0622 | 30 | |
e0981b9b ILT |
31 | /* Internal functions. */ |
32 | static bfd_reloc_status_type sh_reloc | |
33 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
34 | static long get_symbol_value PARAMS ((asymbol *)); | |
35 | static boolean sh_relax_section | |
36 | PARAMS ((bfd *, asection *, struct bfd_link_info *, boolean *)); | |
37 | static boolean sh_relax_delete_bytes | |
38 | PARAMS ((bfd *, asection *, bfd_vma, int)); | |
39 | static boolean sh_relocate_section | |
40 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, | |
41 | struct internal_reloc *, struct internal_syment *, asection **)); | |
42 | static bfd_byte *sh_coff_get_relocated_section_contents | |
43 | PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *, | |
44 | bfd_byte *, boolean, asymbol **)); | |
46dd0622 | 45 | |
e0981b9b | 46 | /* Default section alignment to 2**2. */ |
f6f350fe KR |
47 | #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2) |
48 | ||
e0981b9b ILT |
49 | /* Generate long file names. */ |
50 | #define COFF_LONG_FILENAMES | |
46dd0622 | 51 | |
e0981b9b ILT |
52 | /* The supported relocations. There are a lot of relocations defined |
53 | in coff/internal.h which we do not expect to ever see. */ | |
54 | static reloc_howto_type sh_coff_howtos[] = | |
55 | { | |
56 | { 0 }, | |
57 | { 1 }, | |
58 | { 2 }, | |
59 | { 3 }, /* R_SH_PCREL8 */ | |
60 | { 4 }, /* R_SH_PCREL16 */ | |
61 | { 5 }, /* R_SH_HIGH8 */ | |
62 | { 6 }, /* R_SH_IMM24 */ | |
63 | { 7 }, /* R_SH_LOW16 */ | |
64 | { 8 }, | |
65 | { 9 }, /* R_SH_PCDISP8BY4 */ | |
66 | ||
67 | HOWTO (R_SH_PCDISP8BY2, /* type */ | |
68 | 1, /* rightshift */ | |
69 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
70 | 8, /* bitsize */ | |
71 | true, /* pc_relative */ | |
72 | 0, /* bitpos */ | |
73 | complain_overflow_signed, /* complain_on_overflow */ | |
74 | sh_reloc, /* special_function */ | |
75 | "r_pcdisp8by2", /* name */ | |
76 | true, /* partial_inplace */ | |
77 | 0xff, /* src_mask */ | |
78 | 0xff, /* dst_mask */ | |
79 | true), /* pcrel_offset */ | |
80 | ||
81 | { 11 }, /* R_SH_PCDISP8 */ | |
82 | ||
83 | HOWTO (R_SH_PCDISP, /* type */ | |
84 | 1, /* rightshift */ | |
85 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
86 | 12, /* bitsize */ | |
87 | true, /* pc_relative */ | |
88 | 0, /* bitpos */ | |
89 | complain_overflow_signed, /* complain_on_overflow */ | |
90 | sh_reloc, /* special_function */ | |
91 | "r_pcdisp12by2", /* name */ | |
92 | true, /* partial_inplace */ | |
93 | 0xfff, /* src_mask */ | |
94 | 0xfff, /* dst_mask */ | |
95 | true), /* pcrel_offset */ | |
96 | ||
97 | { 13 }, | |
98 | ||
99 | HOWTO (R_SH_IMM32, /* type */ | |
100 | 0, /* rightshift */ | |
101 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
102 | 32, /* bitsize */ | |
103 | false, /* pc_relative */ | |
104 | 0, /* bitpos */ | |
105 | complain_overflow_bitfield, /* complain_on_overflow */ | |
106 | sh_reloc, /* special_function */ | |
107 | "r_imm32", /* name */ | |
108 | true, /* partial_inplace */ | |
109 | 0xffffffff, /* src_mask */ | |
110 | 0xffffffff, /* dst_mask */ | |
111 | false), /* pcrel_offset */ | |
112 | ||
113 | { 15 }, | |
114 | { 16 }, /* R_SH_IMM8 */ | |
115 | { 17 }, /* R_SH_IMM8BY2 */ | |
116 | { 18 }, /* R_SH_IMM8BY4 */ | |
117 | { 19 }, /* R_SH_IMM4 */ | |
118 | { 20 }, /* R_SH_IMM4BY2 */ | |
119 | { 21 }, /* R_SH_IMM4BY4 */ | |
120 | ||
121 | HOWTO (R_SH_PCRELIMM8BY2, /* type */ | |
122 | 1, /* rightshift */ | |
123 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
124 | 8, /* bitsize */ | |
125 | true, /* pc_relative */ | |
126 | 0, /* bitpos */ | |
127 | complain_overflow_unsigned, /* complain_on_overflow */ | |
128 | sh_reloc, /* special_function */ | |
129 | "r_pcrelimm8by2", /* name */ | |
130 | true, /* partial_inplace */ | |
131 | 0xff, /* src_mask */ | |
132 | 0xff, /* dst_mask */ | |
133 | true), /* pcrel_offset */ | |
134 | ||
135 | HOWTO (R_SH_PCRELIMM8BY4, /* type */ | |
136 | 2, /* rightshift */ | |
137 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
138 | 8, /* bitsize */ | |
139 | true, /* pc_relative */ | |
140 | 0, /* bitpos */ | |
141 | complain_overflow_unsigned, /* complain_on_overflow */ | |
142 | sh_reloc, /* special_function */ | |
143 | "r_pcrelimm8by4", /* name */ | |
144 | true, /* partial_inplace */ | |
145 | 0xff, /* src_mask */ | |
146 | 0xff, /* dst_mask */ | |
147 | true), /* pcrel_offset */ | |
148 | ||
149 | HOWTO (R_SH_IMM16, /* type */ | |
150 | 0, /* rightshift */ | |
151 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
152 | 16, /* bitsize */ | |
153 | false, /* pc_relative */ | |
154 | 0, /* bitpos */ | |
155 | complain_overflow_bitfield, /* complain_on_overflow */ | |
156 | sh_reloc, /* special_function */ | |
157 | "r_imm16", /* name */ | |
158 | true, /* partial_inplace */ | |
159 | 0xffff, /* src_mask */ | |
160 | 0xffff, /* dst_mask */ | |
161 | false), /* pcrel_offset */ | |
162 | ||
163 | HOWTO (R_SH_SWITCH16, /* type */ | |
164 | 0, /* rightshift */ | |
165 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
166 | 16, /* bitsize */ | |
167 | false, /* pc_relative */ | |
168 | 0, /* bitpos */ | |
169 | complain_overflow_bitfield, /* complain_on_overflow */ | |
170 | sh_reloc, /* special_function */ | |
171 | "r_switch16", /* name */ | |
172 | true, /* partial_inplace */ | |
173 | 0xffff, /* src_mask */ | |
174 | 0xffff, /* dst_mask */ | |
175 | false), /* pcrel_offset */ | |
46dd0622 | 176 | |
e0981b9b ILT |
177 | HOWTO (R_SH_SWITCH32, /* type */ |
178 | 0, /* rightshift */ | |
179 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
180 | 32, /* bitsize */ | |
181 | false, /* pc_relative */ | |
182 | 0, /* bitpos */ | |
183 | complain_overflow_bitfield, /* complain_on_overflow */ | |
184 | sh_reloc, /* special_function */ | |
185 | "r_switch32", /* name */ | |
186 | true, /* partial_inplace */ | |
187 | 0xffffffff, /* src_mask */ | |
188 | 0xffffffff, /* dst_mask */ | |
189 | false), /* pcrel_offset */ | |
46dd0622 | 190 | |
e0981b9b ILT |
191 | HOWTO (R_SH_USES, /* type */ |
192 | 0, /* rightshift */ | |
193 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
194 | 16, /* bitsize */ | |
195 | false, /* pc_relative */ | |
196 | 0, /* bitpos */ | |
197 | complain_overflow_bitfield, /* complain_on_overflow */ | |
198 | sh_reloc, /* special_function */ | |
199 | "r_uses", /* name */ | |
200 | true, /* partial_inplace */ | |
201 | 0xffff, /* src_mask */ | |
202 | 0xffff, /* dst_mask */ | |
203 | false), /* pcrel_offset */ | |
204 | ||
205 | HOWTO (R_SH_COUNT, /* type */ | |
206 | 0, /* rightshift */ | |
207 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
208 | 32, /* bitsize */ | |
209 | false, /* pc_relative */ | |
210 | 0, /* bitpos */ | |
211 | complain_overflow_bitfield, /* complain_on_overflow */ | |
212 | sh_reloc, /* special_function */ | |
213 | "r_count", /* name */ | |
214 | true, /* partial_inplace */ | |
215 | 0xffffffff, /* src_mask */ | |
216 | 0xffffffff, /* dst_mask */ | |
217 | false), /* pcrel_offset */ | |
218 | ||
219 | HOWTO (R_SH_ALIGN, /* type */ | |
220 | 0, /* rightshift */ | |
221 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
222 | 32, /* bitsize */ | |
223 | false, /* pc_relative */ | |
224 | 0, /* bitpos */ | |
225 | complain_overflow_bitfield, /* complain_on_overflow */ | |
226 | sh_reloc, /* special_function */ | |
227 | "r_align", /* name */ | |
228 | true, /* partial_inplace */ | |
229 | 0xffffffff, /* src_mask */ | |
230 | 0xffffffff, /* dst_mask */ | |
231 | false) /* pcrel_offset */ | |
232 | }; | |
233 | ||
234 | #define SH_COFF_HOWTO_COUNT (sizeof sh_coff_howtos / sizeof sh_coff_howtos[0]) | |
235 | ||
236 | /* Check for a bad magic number. */ | |
46dd0622 | 237 | #define BADMAG(x) SHBADMAG(x) |
46dd0622 | 238 | |
e0981b9b ILT |
239 | /* Customize coffcode.h (this is not currently used). */ |
240 | #define SH 1 | |
241 | ||
242 | /* FIXME: This should not be set here. */ | |
46dd0622 SC |
243 | #define __A_MAGIC_SET__ |
244 | ||
e0981b9b ILT |
245 | /* Swap the r_offset field in and out. */ |
246 | #define SWAP_IN_RELOC_OFFSET bfd_h_get_32 | |
247 | #define SWAP_OUT_RELOC_OFFSET bfd_h_put_32 | |
248 | ||
249 | /* Swap out extra information in the reloc structure. */ | |
250 | #define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) \ | |
251 | do \ | |
252 | { \ | |
253 | dst->r_stuff[0] = 'S'; \ | |
254 | dst->r_stuff[1] = 'C'; \ | |
255 | } \ | |
256 | while (0) | |
257 | ||
258 | /* Get the value of a symbol, when performing a relocation. */ | |
46dd0622 | 259 | |
cf345e36 SC |
260 | static long |
261 | get_symbol_value (symbol) | |
262 | asymbol *symbol; | |
263 | { | |
e0981b9b | 264 | bfd_vma relocation; |
cf345e36 SC |
265 | |
266 | if (bfd_is_com_section (symbol->section)) | |
cf345e36 | 267 | relocation = 0; |
cf345e36 | 268 | else |
e0981b9b ILT |
269 | relocation = (symbol->value + |
270 | symbol->section->output_section->vma + | |
271 | symbol->section->output_offset); | |
cf345e36 | 272 | |
e0981b9b | 273 | return relocation; |
cf345e36 | 274 | } |
46dd0622 | 275 | |
e0981b9b ILT |
276 | /* This macro is used in coffcode.h to get the howto corresponding to |
277 | an internal reloc. */ | |
278 | ||
279 | #define RTYPE2HOWTO(relent, internal) \ | |
280 | ((relent)->howto = \ | |
281 | ((internal)->r_type < SH_COFF_HOWTO_COUNT \ | |
282 | ? &sh_coff_howtos[(internal)->r_type] \ | |
283 | : (reloc_howto_type *) NULL)) | |
284 | ||
285 | /* This is the same as the macro in coffcode.h, except that it copies | |
286 | r_offset into reloc_entry->addend for some relocs. */ | |
287 | #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \ | |
288 | { \ | |
289 | coff_symbol_type *coffsym = (coff_symbol_type *) NULL; \ | |
290 | if (ptr && bfd_asymbol_bfd (ptr) != abfd) \ | |
291 | coffsym = (obj_symbols (abfd) \ | |
292 | + (cache_ptr->sym_ptr_ptr - symbols)); \ | |
293 | else if (ptr) \ | |
294 | coffsym = coff_symbol_from (abfd, ptr); \ | |
295 | if (coffsym != (coff_symbol_type *) NULL \ | |
296 | && coffsym->native->u.syment.n_scnum == 0) \ | |
297 | cache_ptr->addend = 0; \ | |
298 | else if (ptr && bfd_asymbol_bfd (ptr) == abfd \ | |
299 | && ptr->section != (asection *) NULL) \ | |
300 | cache_ptr->addend = - (ptr->section->vma + ptr->value); \ | |
301 | else \ | |
302 | cache_ptr->addend = 0; \ | |
303 | if ((reloc).r_type == R_SH_SWITCH16 \ | |
304 | || (reloc).r_type == R_SH_SWITCH32 \ | |
305 | || (reloc).r_type == R_SH_USES \ | |
306 | || (reloc).r_type == R_SH_COUNT \ | |
307 | || (reloc).r_type == R_SH_ALIGN) \ | |
308 | cache_ptr->addend = (reloc).r_offset; \ | |
cf345e36 SC |
309 | } |
310 | ||
e0981b9b | 311 | /* This is the howto function for the SH relocations. */ |
cf345e36 SC |
312 | |
313 | static bfd_reloc_status_type | |
314 | sh_reloc (abfd, reloc_entry, symbol_in, data, input_section, output_bfd, | |
e0981b9b | 315 | error_message) |
cf345e36 SC |
316 | bfd *abfd; |
317 | arelent *reloc_entry; | |
318 | asymbol *symbol_in; | |
319 | PTR data; | |
320 | asection *input_section; | |
321 | bfd *output_bfd; | |
322 | char **error_message; | |
323 | { | |
cf345e36 | 324 | unsigned long insn; |
e0981b9b | 325 | bfd_vma sym_value; |
cf345e36 | 326 | unsigned short r_type; |
e0981b9b ILT |
327 | bfd_vma addr = reloc_entry->address; |
328 | bfd_byte *hit_data = addr + (bfd_byte *) data; | |
cf345e36 | 329 | |
cf345e36 SC |
330 | r_type = reloc_entry->howto->type; |
331 | ||
e0981b9b ILT |
332 | if (output_bfd != NULL) |
333 | { | |
334 | /* Partial linking--do nothing. */ | |
335 | reloc_entry->address += input_section->output_offset; | |
336 | return bfd_reloc_ok; | |
337 | } | |
338 | ||
339 | /* Almost all relocs have to do with relaxing. If any work must be | |
340 | done for them, it has been done in sh_relax_section. */ | |
341 | if (r_type != R_SH_IMM32 | |
342 | && (r_type != R_SH_PCDISP | |
343 | || (symbol_in->flags & BSF_LOCAL) != 0)) | |
cf345e36 | 344 | return bfd_reloc_ok; |
cf345e36 SC |
345 | |
346 | if (symbol_in != NULL | |
347 | && bfd_is_und_section (symbol_in->section)) | |
e0981b9b | 348 | return bfd_reloc_undefined; |
cf345e36 | 349 | |
e0981b9b | 350 | sym_value = get_symbol_value (symbol_in); |
cf345e36 | 351 | |
e0981b9b | 352 | switch (r_type) |
cf345e36 SC |
353 | { |
354 | case R_SH_IMM32: | |
e0981b9b ILT |
355 | insn = bfd_get_32 (abfd, hit_data); |
356 | insn += sym_value + reloc_entry->addend; | |
357 | bfd_put_32 (abfd, insn, hit_data); | |
358 | break; | |
359 | case R_SH_PCDISP: | |
360 | insn = bfd_get_16 (abfd, hit_data); | |
361 | sym_value += reloc_entry->addend; | |
362 | sym_value -= (input_section->output_section->vma | |
363 | + input_section->output_offset | |
364 | + addr | |
365 | + 4); | |
366 | sym_value += (insn & 0xfff) << 1; | |
367 | if (insn & 0x800) | |
368 | sym_value -= 0x1000; | |
369 | insn = (insn & 0xf000) | (sym_value & 0xfff); | |
370 | bfd_put_16 (abfd, insn, hit_data); | |
ae115e51 | 371 | if (sym_value < (bfd_vma) -0x1000 || sym_value >= 0x1000) |
e0981b9b | 372 | return bfd_reloc_overflow; |
cf345e36 SC |
373 | break; |
374 | default: | |
e0981b9b ILT |
375 | abort (); |
376 | break; | |
cf345e36 SC |
377 | } |
378 | ||
e0981b9b ILT |
379 | return bfd_reloc_ok; |
380 | } | |
381 | ||
382 | /* We can do relaxing. */ | |
383 | #define coff_bfd_relax_section sh_relax_section | |
384 | ||
385 | /* We use the special COFF backend linker. */ | |
386 | #define coff_relocate_section sh_relocate_section | |
387 | ||
388 | /* When relaxing, we need to use special code to get the relocated | |
389 | section contents. */ | |
390 | #define coff_bfd_get_relocated_section_contents \ | |
391 | sh_coff_get_relocated_section_contents | |
392 | ||
393 | #include "coffcode.h" | |
394 | ||
395 | /* This function handles relaxing on the SH. | |
396 | ||
397 | Function calls on the SH look like this: | |
398 | ||
399 | movl L1,r0 | |
400 | ... | |
401 | jsr @r0 | |
402 | ... | |
403 | L1: | |
404 | .long function | |
405 | ||
406 | The compiler and assembler will cooperate to create R_SH_USES | |
407 | relocs on the jsr instructions. The r_offset field of the | |
408 | R_SH_USES reloc is the PC relative offset to the instruction which | |
409 | loads the register (the r_offset field is computed as though it | |
410 | were a jump instruction, so the offset value is actually from four | |
411 | bytes past the instruction). The linker can use this reloc to | |
412 | determine just which function is being called, and thus decide | |
413 | whether it is possible to replace the jsr with a bsr. | |
414 | ||
415 | If multiple function calls are all based on a single register load | |
416 | (i.e., the same function is called multiple times), the compiler | |
417 | guarantees that each function call will have an R_SH_USES reloc. | |
418 | Therefore, if the linker is able to convert each R_SH_USES reloc | |
419 | which refers to that address, it can safely eliminate the register | |
420 | load. | |
421 | ||
422 | When the assembler creates an R_SH_USES reloc, it examines it to | |
423 | determine which address is being loaded (L1 in the above example). | |
424 | It then counts the number of references to that address, and | |
425 | creates an R_SH_COUNT reloc at that address. The r_offset field of | |
426 | the R_SH_COUNT reloc will be the number of references. If the | |
427 | linker is able to eliminate a register load, it can use the | |
428 | R_SH_COUNT reloc to see whether it can also eliminate the function | |
429 | address. */ | |
430 | ||
431 | static boolean | |
432 | sh_relax_section (abfd, sec, link_info, again) | |
433 | bfd *abfd; | |
434 | asection *sec; | |
435 | struct bfd_link_info *link_info; | |
436 | boolean *again; | |
437 | { | |
438 | struct internal_reloc *internal_relocs; | |
439 | struct internal_reloc *free_relocs = NULL; | |
440 | struct internal_reloc *irel, *irelend; | |
441 | bfd_byte *contents = NULL; | |
442 | bfd_byte *free_contents = NULL; | |
443 | ||
444 | *again = false; | |
445 | ||
446 | if (link_info->relocateable | |
447 | || (sec->flags & SEC_RELOC) == 0 | |
448 | || sec->reloc_count == 0) | |
449 | return true; | |
450 | ||
451 | /* If this is the first time we have been called for this section, | |
452 | initialize the cooked size. */ | |
453 | if (sec->_cooked_size == 0) | |
454 | sec->_cooked_size = sec->_raw_size; | |
455 | ||
456 | internal_relocs = (_bfd_coff_read_internal_relocs | |
457 | (abfd, sec, link_info->keep_memory, | |
458 | (bfd_byte *) NULL, false, | |
459 | (struct internal_reloc *) NULL)); | |
460 | if (internal_relocs == NULL) | |
461 | goto error_return; | |
462 | if (! link_info->keep_memory) | |
463 | free_relocs = internal_relocs; | |
464 | ||
465 | irelend = internal_relocs + sec->reloc_count; | |
466 | for (irel = internal_relocs; irel < irelend; irel++) | |
467 | { | |
468 | bfd_vma laddr, paddr, symval; | |
469 | unsigned short insn; | |
470 | struct internal_reloc *irelfn, *irelscan, *irelcount; | |
471 | struct internal_syment sym; | |
472 | bfd_signed_vma foff; | |
473 | ||
474 | if (irel->r_type != R_SH_USES) | |
475 | continue; | |
476 | ||
477 | /* Get the section contents. */ | |
478 | if (contents == NULL) | |
479 | { | |
480 | if (coff_section_data (abfd, sec) != NULL | |
481 | && coff_section_data (abfd, sec)->contents != NULL) | |
482 | contents = coff_section_data (abfd, sec)->contents; | |
483 | else | |
484 | { | |
485 | contents = (bfd_byte *) malloc (sec->_raw_size); | |
486 | if (contents == NULL) | |
487 | { | |
488 | bfd_set_error (bfd_error_no_memory); | |
489 | goto error_return; | |
490 | } | |
491 | free_contents = contents; | |
492 | ||
493 | if (! bfd_get_section_contents (abfd, sec, contents, | |
494 | (file_ptr) 0, sec->_raw_size)) | |
495 | goto error_return; | |
496 | } | |
497 | } | |
498 | ||
499 | /* The r_offset field of the R_SH_USES reloc will point us to | |
500 | the register load. The 4 is because the r_offset field is | |
501 | computed as though it were a jump offset, which are based | |
502 | from 4 bytes after the jump instruction. */ | |
503 | laddr = irel->r_vaddr - sec->vma + 4 + irel->r_offset; | |
504 | if (laddr >= sec->_raw_size) | |
505 | { | |
506 | (*_bfd_error_handler) ("%s: 0x%lx: warning: bad R_SH_USES offset", | |
507 | bfd_get_filename (abfd), | |
508 | (unsigned long) irel->r_vaddr); | |
509 | continue; | |
510 | } | |
511 | insn = bfd_get_16 (abfd, contents + laddr); | |
512 | ||
513 | /* If the instruction is not mov.l NN,rN, we don't know what to | |
514 | do. */ | |
515 | if ((insn & 0xf000) != 0xd000) | |
516 | { | |
517 | ((*_bfd_error_handler) | |
518 | ("%s: 0x%lx: warning: R_SH_USES points to unrecognized insn 0x%x", | |
519 | bfd_get_filename (abfd), (unsigned long) irel->r_vaddr, insn)); | |
520 | continue; | |
521 | } | |
522 | ||
523 | /* Get the address from which the register is being loaded. The | |
524 | displacement in the mov.l instruction is quadrupled. It is a | |
525 | displacement from four bytes after the movl instruction, but, | |
526 | before adding in the PC address, two least significant bits | |
527 | of the PC are cleared. We assume that the section is aligned | |
528 | on a four byte boundary. */ | |
529 | paddr = insn & 0xff; | |
530 | paddr *= 4; | |
531 | paddr += (laddr + 4) &~ 3; | |
532 | if (paddr >= sec->_raw_size) | |
533 | { | |
534 | ((*_bfd_error_handler) | |
535 | ("%s: 0x%lx: warning: bad R_SH_USES load offset", | |
536 | bfd_get_filename (abfd), (unsigned long) irel->r_vaddr)); | |
537 | continue; | |
538 | } | |
539 | ||
540 | /* Get the reloc for the address from which the register is | |
541 | being loaded. This reloc will tell us which function is | |
542 | actually being called. */ | |
543 | paddr += sec->vma; | |
544 | for (irelfn = internal_relocs; irelfn < irelend; irelfn++) | |
545 | if (irelfn->r_vaddr == paddr | |
546 | && irelfn->r_type == R_SH_IMM32) | |
547 | break; | |
548 | if (irelfn >= irelend) | |
549 | { | |
550 | ((*_bfd_error_handler) | |
551 | ("%s: 0x%lx: warning: could not find expected reloc", | |
552 | bfd_get_filename (abfd), (unsigned long) paddr)); | |
553 | continue; | |
554 | } | |
555 | ||
556 | /* Get the value of the symbol referred to by the reloc. */ | |
557 | if (! _bfd_coff_get_external_symbols (abfd)) | |
558 | goto error_return; | |
559 | bfd_coff_swap_sym_in (abfd, | |
560 | ((bfd_byte *) obj_coff_external_syms (abfd) | |
561 | + (irelfn->r_symndx | |
562 | * bfd_coff_symesz (abfd))), | |
563 | &sym); | |
564 | if (sym.n_scnum != 0 && sym.n_scnum != sec->target_index) | |
565 | { | |
566 | ((*_bfd_error_handler) | |
567 | ("%s: 0x%lx: warning: symbol in unexpected section", | |
568 | bfd_get_filename (abfd), (unsigned long) paddr)); | |
569 | continue; | |
570 | } | |
571 | ||
572 | if (sym.n_sclass != C_EXT) | |
573 | { | |
574 | symval = (sym.n_value | |
575 | - sec->vma | |
576 | + sec->output_section->vma | |
577 | + sec->output_offset); | |
578 | } | |
579 | else | |
580 | { | |
581 | struct coff_link_hash_entry *h; | |
cf345e36 | 582 | |
e0981b9b ILT |
583 | h = obj_coff_sym_hashes (abfd)[irelfn->r_symndx]; |
584 | BFD_ASSERT (h != NULL); | |
585 | if (h->root.type != bfd_link_hash_defined | |
586 | && h->root.type != bfd_link_hash_defweak) | |
587 | { | |
588 | /* This appears to be a reference to an undefined | |
589 | symbol. Just ignore it--it will be caught by the | |
590 | regular reloc processing. */ | |
591 | continue; | |
592 | } | |
593 | ||
594 | symval = (h->root.u.def.value | |
595 | + h->root.u.def.section->output_section->vma | |
596 | + h->root.u.def.section->output_offset); | |
597 | } | |
598 | ||
599 | symval += bfd_get_32 (abfd, contents + paddr - sec->vma); | |
600 | ||
601 | /* See if this function call can be shortened. */ | |
602 | foff = (symval | |
603 | - (irel->r_vaddr | |
604 | - sec->vma | |
605 | + sec->output_section->vma | |
606 | + sec->output_offset | |
607 | + 4)); | |
608 | if (foff < -0x1000 || foff >= 0x1000) | |
609 | { | |
610 | /* After all that work, we can't shorten this function call. */ | |
611 | continue; | |
612 | } | |
613 | ||
614 | /* Shorten the function call. */ | |
615 | ||
616 | /* For simplicity of coding, we are going to modify the section | |
617 | contents, the section relocs, and the BFD symbol table. We | |
618 | must tell the rest of the code not to free up this | |
619 | information. It would be possible to instead create a table | |
620 | of changes which have to be made, as is done in coff-mips.c; | |
621 | that would be more work, but would require less memory when | |
622 | the linker is run. */ | |
623 | ||
624 | if (coff_section_data (abfd, sec) == NULL) | |
625 | { | |
626 | sec->used_by_bfd = | |
ae115e51 | 627 | ((PTR) bfd_zalloc (abfd, sizeof (struct coff_section_tdata))); |
e0981b9b ILT |
628 | if (sec->used_by_bfd == NULL) |
629 | { | |
630 | bfd_set_error (bfd_error_no_memory); | |
631 | goto error_return; | |
632 | } | |
633 | } | |
634 | ||
635 | coff_section_data (abfd, sec)->relocs = internal_relocs; | |
636 | coff_section_data (abfd, sec)->keep_relocs = true; | |
637 | free_relocs = NULL; | |
638 | ||
639 | coff_section_data (abfd, sec)->contents = contents; | |
640 | coff_section_data (abfd, sec)->keep_contents = true; | |
641 | free_contents = NULL; | |
642 | ||
643 | obj_coff_keep_syms (abfd) = true; | |
644 | ||
645 | /* Replace the jsr with a bsr. */ | |
646 | ||
647 | /* Change the R_SH_USES reloc into an R_SH_PCDISP reloc, and | |
648 | replace the jsr with a bsr. */ | |
649 | irel->r_type = R_SH_PCDISP; | |
650 | irel->r_symndx = irelfn->r_symndx; | |
651 | if (sym.n_sclass != C_EXT) | |
652 | { | |
653 | /* If this needs to be changed because of future relaxing, | |
654 | it will be handled here like other internal PCDISP | |
655 | relocs. */ | |
656 | bfd_put_16 (abfd, | |
657 | 0xb000 | ((foff >> 1) & 0xfff), | |
658 | contents + irel->r_vaddr - sec->vma); | |
659 | } | |
660 | else | |
661 | { | |
662 | /* We can't fully resolve this yet, because the external | |
663 | symbol value may be changed by future relaxing. We let | |
664 | the final link phase handle it. */ | |
665 | bfd_put_16 (abfd, 0xb000, contents + irel->r_vaddr - sec->vma); | |
666 | } | |
667 | ||
668 | /* See if there is another R_SH_USES reloc referring to the same | |
669 | register load. */ | |
670 | for (irelscan = internal_relocs; irelscan < irelend; irelscan++) | |
671 | if (irelscan->r_type == R_SH_USES | |
672 | && laddr == irelscan->r_vaddr - sec->vma + 4 + irelscan->r_offset) | |
673 | break; | |
674 | if (irelscan < irelend) | |
675 | { | |
676 | /* Some other function call depends upon this register load, | |
677 | and we have not yet converted that function call. | |
678 | Indeed, we may never be able to convert it. There is | |
679 | nothing else we can do at this point. */ | |
680 | continue; | |
681 | } | |
682 | ||
683 | /* Look for a R_SH_COUNT reloc on the location where the | |
684 | function address is stored. Do this before deleting any | |
685 | bytes, to avoid confusion about the address. */ | |
686 | for (irelcount = internal_relocs; irelcount < irelend; irelcount++) | |
687 | if (irelcount->r_vaddr == paddr | |
688 | && irelcount->r_type == R_SH_COUNT) | |
689 | break; | |
690 | ||
691 | /* Delete the register load. */ | |
692 | if (! sh_relax_delete_bytes (abfd, sec, laddr, 2)) | |
693 | goto error_return; | |
694 | ||
695 | /* That will change things, so, just in case it permits some | |
696 | other function call to come within range, we should relax | |
697 | again. Note that this is not required, and it may be slow. */ | |
698 | *again = true; | |
699 | ||
700 | /* Now check whether we got a COUNT reloc. */ | |
701 | if (irelcount >= irelend) | |
702 | { | |
703 | ((*_bfd_error_handler) | |
704 | ("%s: 0x%lx: warning: could not find expected COUNT reloc", | |
705 | bfd_get_filename (abfd), (unsigned long) paddr)); | |
706 | continue; | |
707 | } | |
708 | ||
709 | /* The number of uses is stored in the r_offset field. We've | |
710 | just deleted one. */ | |
711 | if (irelcount->r_offset == 0) | |
712 | { | |
713 | ((*_bfd_error_handler) ("%s: 0x%lx: warning: bad count", | |
714 | bfd_get_filename (abfd), | |
715 | (unsigned long) paddr)); | |
716 | continue; | |
717 | } | |
718 | ||
719 | --irelcount->r_offset; | |
720 | ||
721 | /* If there are no more uses, we can delete the address. Reload | |
722 | the address from irelfn, in case it was changed by the | |
723 | previous call to sh_relax_delete_bytes. */ | |
724 | if (irelcount->r_offset == 0) | |
725 | { | |
726 | if (! sh_relax_delete_bytes (abfd, sec, | |
727 | irelfn->r_vaddr - sec->vma, 4)) | |
728 | goto error_return; | |
729 | } | |
730 | ||
731 | /* We've done all we can with that function call. */ | |
732 | } | |
733 | ||
734 | if (free_relocs != NULL) | |
735 | { | |
736 | free (free_relocs); | |
737 | free_relocs = NULL; | |
738 | } | |
739 | ||
740 | if (free_contents != NULL) | |
741 | { | |
742 | if (! link_info->keep_memory) | |
743 | free (free_contents); | |
744 | else | |
745 | { | |
746 | /* Cache the section contents for coff_link_input_bfd. */ | |
747 | if (coff_section_data (abfd, sec) == NULL) | |
748 | { | |
749 | sec->used_by_bfd = | |
ae115e51 | 750 | ((PTR) bfd_zalloc (abfd, sizeof (struct coff_section_tdata))); |
e0981b9b ILT |
751 | if (sec->used_by_bfd == NULL) |
752 | { | |
753 | bfd_set_error (bfd_error_no_memory); | |
754 | goto error_return; | |
755 | } | |
756 | coff_section_data (abfd, sec)->relocs = NULL; | |
757 | } | |
758 | coff_section_data (abfd, sec)->contents = contents; | |
759 | } | |
760 | } | |
761 | ||
762 | return true; | |
763 | ||
764 | error_return: | |
765 | if (free_relocs != NULL) | |
766 | free (free_relocs); | |
767 | if (free_contents != NULL) | |
768 | free (free_contents); | |
769 | return false; | |
cf345e36 SC |
770 | } |
771 | ||
e0981b9b | 772 | /* Delete some bytes from a section while relaxing. */ |
cf345e36 SC |
773 | |
774 | static boolean | |
e0981b9b ILT |
775 | sh_relax_delete_bytes (abfd, sec, addr, count) |
776 | bfd *abfd; | |
777 | asection *sec; | |
778 | bfd_vma addr; | |
779 | int count; | |
780 | { | |
781 | bfd_byte *contents; | |
782 | struct internal_reloc *irel, *irelend; | |
783 | struct internal_reloc *irelalign; | |
784 | bfd_vma toaddr; | |
785 | bfd_byte *esym, *esymend; | |
786 | bfd_size_type symesz; | |
787 | struct coff_link_hash_entry **sym_hash; | |
788 | asection *o; | |
789 | ||
790 | contents = coff_section_data (abfd, sec)->contents; | |
791 | ||
792 | /* The deletion must stop at the next ALIGN reloc for an aligment | |
793 | power larger than the number of bytes we are deleting. */ | |
794 | ||
795 | irelalign = NULL; | |
796 | toaddr = sec->_cooked_size; | |
797 | ||
798 | irel = coff_section_data (abfd, sec)->relocs; | |
799 | irelend = irel + sec->reloc_count; | |
800 | for (; irel < irelend; irel++) | |
801 | { | |
802 | if (irel->r_type == R_SH_ALIGN | |
803 | && irel->r_vaddr - sec->vma > addr | |
804 | && count < (1 << irel->r_offset)) | |
805 | { | |
806 | irelalign = irel; | |
807 | toaddr = irel->r_vaddr - sec->vma; | |
808 | break; | |
809 | } | |
810 | } | |
811 | ||
812 | /* Actually delete the bytes. */ | |
813 | memmove (contents + addr, contents + addr + count, toaddr - addr - count); | |
814 | if (irelalign == NULL) | |
815 | sec->_cooked_size -= count; | |
816 | else | |
817 | memset (contents + toaddr - count, 0, count); | |
818 | ||
819 | /* Adjust all the relocs. */ | |
820 | for (irel = coff_section_data (abfd, sec)->relocs; irel < irelend; irel++) | |
821 | { | |
822 | bfd_vma nraddr, start, stop; | |
823 | int insn = 0; | |
824 | struct internal_syment sym; | |
825 | int off, adjust, oinsn; | |
826 | bfd_signed_vma voff; | |
827 | boolean overflow; | |
828 | ||
829 | /* Get the new reloc address. */ | |
830 | nraddr = irel->r_vaddr - sec->vma; | |
831 | if ((irel->r_vaddr - sec->vma > addr | |
832 | && irel->r_vaddr - sec->vma < toaddr) | |
833 | || (irel->r_type == R_SH_ALIGN | |
834 | && irel->r_vaddr - sec->vma == toaddr)) | |
835 | nraddr -= count; | |
836 | ||
837 | /* See if this reloc was for the bytes we have deleted, in which | |
838 | case we no longer care about it. */ | |
839 | if (irel->r_vaddr - sec->vma >= addr | |
840 | && irel->r_vaddr - sec->vma < addr + count | |
841 | && irel->r_type != R_SH_ALIGN) | |
842 | irel->r_type = R_SH_UNUSED; | |
843 | ||
844 | /* If this is a PC relative reloc, see if the range it covers | |
845 | includes the bytes we have deleted. */ | |
846 | switch (irel->r_type) | |
847 | { | |
848 | default: | |
849 | break; | |
850 | ||
851 | case R_SH_PCDISP8BY2: | |
852 | case R_SH_PCDISP: | |
853 | case R_SH_PCRELIMM8BY2: | |
854 | case R_SH_PCRELIMM8BY4: | |
855 | start = irel->r_vaddr - sec->vma; | |
856 | insn = bfd_get_16 (abfd, contents + nraddr); | |
857 | break; | |
858 | } | |
859 | ||
860 | switch (irel->r_type) | |
861 | { | |
862 | default: | |
863 | start = stop = addr; | |
864 | break; | |
865 | ||
866 | case R_SH_IMM32: | |
867 | /* If this reloc is against a symbol defined in this | |
868 | section, and the symbol will not be adjusted below, we | |
869 | must check the addend to see it will put the value in | |
870 | range to be adjusted, and hence must be changed. */ | |
871 | bfd_coff_swap_sym_in (abfd, | |
872 | ((bfd_byte *) obj_coff_external_syms (abfd) | |
873 | + (irel->r_symndx | |
874 | * bfd_coff_symesz (abfd))), | |
875 | &sym); | |
876 | if (sym.n_sclass != C_EXT | |
877 | && sym.n_scnum == sec->target_index | |
ae115e51 ILT |
878 | && ((bfd_vma) sym.n_value <= addr |
879 | || (bfd_vma) sym.n_value >= toaddr)) | |
e0981b9b ILT |
880 | { |
881 | bfd_vma val; | |
882 | ||
883 | val = bfd_get_32 (abfd, contents + nraddr); | |
884 | val += sym.n_value; | |
885 | if (val >= addr && val < toaddr) | |
886 | bfd_put_32 (abfd, val - count, contents + nraddr); | |
887 | } | |
888 | start = stop = addr; | |
889 | break; | |
890 | ||
891 | case R_SH_PCDISP8BY2: | |
892 | off = insn & 0xff; | |
893 | if (off & 0x80) | |
894 | off -= 0x100; | |
895 | stop = (bfd_vma) ((bfd_signed_vma) start + 4 + off * 2); | |
896 | break; | |
897 | ||
898 | case R_SH_PCDISP: | |
899 | bfd_coff_swap_sym_in (abfd, | |
900 | ((bfd_byte *) obj_coff_external_syms (abfd) | |
901 | + (irel->r_symndx | |
902 | * bfd_coff_symesz (abfd))), | |
903 | &sym); | |
904 | if (sym.n_sclass == C_EXT) | |
905 | start = stop = addr; | |
906 | else | |
907 | { | |
908 | off = insn & 0xfff; | |
909 | if (off & 0x800) | |
910 | off -= 0x1000; | |
911 | stop = (bfd_vma) ((bfd_signed_vma) start + 4 + off * 2); | |
912 | } | |
913 | break; | |
914 | ||
915 | case R_SH_PCRELIMM8BY2: | |
916 | off = insn & 0xff; | |
917 | stop = start + 4 + off * 2; | |
918 | break; | |
919 | ||
920 | case R_SH_PCRELIMM8BY4: | |
921 | off = insn & 0xff; | |
922 | stop = (start &~ (bfd_vma) 3) + 4 + off * 4; | |
923 | break; | |
924 | ||
925 | case R_SH_SWITCH16: | |
926 | case R_SH_SWITCH32: | |
927 | /* These relocs types represent | |
928 | .word L2-L1 | |
929 | The r_offset field holds the difference between the reloc | |
930 | address and L1. That is the start of the reloc, and | |
931 | adding in the contents gives us the top. We must adjust | |
932 | both the r_offset field and the section contents. */ | |
933 | ||
934 | start = irel->r_vaddr - sec->vma; | |
935 | stop = (bfd_vma) ((bfd_signed_vma) start - (long) irel->r_offset); | |
936 | ||
937 | if (start > addr | |
938 | && start < toaddr | |
939 | && (stop <= addr || stop >= toaddr)) | |
940 | irel->r_offset += count; | |
941 | else if (stop > addr | |
942 | && stop < toaddr | |
943 | && (start <= addr || start >= toaddr)) | |
944 | irel->r_offset -= count; | |
945 | ||
946 | start = stop; | |
947 | ||
948 | if (irel->r_type == R_SH_SWITCH16) | |
949 | voff = bfd_get_signed_16 (abfd, contents + nraddr); | |
950 | else | |
951 | voff = bfd_get_signed_32 (abfd, contents + nraddr); | |
952 | stop = (bfd_vma) ((bfd_signed_vma) start + voff); | |
953 | ||
954 | break; | |
955 | ||
956 | case R_SH_USES: | |
957 | start = irel->r_vaddr - sec->vma; | |
958 | stop = (bfd_vma) ((bfd_signed_vma) start + (long) irel->r_offset); | |
959 | break; | |
960 | } | |
961 | ||
962 | if (start > addr | |
963 | && start < toaddr | |
964 | && (stop <= addr || stop >= toaddr)) | |
965 | adjust = count; | |
966 | else if (stop > addr | |
967 | && stop < toaddr | |
968 | && (start <= addr || start >= toaddr)) | |
969 | adjust = - count; | |
970 | else | |
971 | adjust = 0; | |
972 | ||
973 | if (adjust != 0) | |
974 | { | |
975 | oinsn = insn; | |
976 | overflow = false; | |
977 | switch (irel->r_type) | |
978 | { | |
979 | default: | |
980 | abort (); | |
981 | break; | |
982 | ||
983 | case R_SH_PCDISP8BY2: | |
984 | case R_SH_PCRELIMM8BY2: | |
985 | insn += adjust / 2; | |
986 | if ((oinsn & 0xff00) != (insn & 0xff00)) | |
987 | overflow = true; | |
988 | bfd_put_16 (abfd, insn, contents + nraddr); | |
989 | break; | |
990 | ||
991 | case R_SH_PCDISP: | |
992 | insn += adjust / 2; | |
993 | if ((oinsn & 0xf000) != (insn & 0xf000)) | |
994 | overflow = true; | |
995 | bfd_put_16 (abfd, insn, contents + nraddr); | |
996 | break; | |
997 | ||
998 | case R_SH_PCRELIMM8BY4: | |
999 | BFD_ASSERT (adjust == count || count >= 4); | |
1000 | if (count >= 4) | |
1001 | insn += adjust / 4; | |
1002 | else | |
1003 | { | |
1004 | if ((irel->r_vaddr & 3) == 0) | |
1005 | ++insn; | |
1006 | } | |
1007 | if ((oinsn & 0xff00) != (insn & 0xff00)) | |
1008 | overflow = true; | |
1009 | bfd_put_16 (abfd, insn, contents + nraddr); | |
1010 | break; | |
1011 | ||
1012 | case R_SH_SWITCH16: | |
1013 | voff += adjust; | |
1014 | if (voff < - 0x8000 || voff >= 0x8000) | |
1015 | overflow = true; | |
1016 | bfd_put_signed_16 (abfd, voff, contents + nraddr); | |
1017 | break; | |
1018 | ||
1019 | case R_SH_SWITCH32: | |
1020 | voff += adjust; | |
1021 | bfd_put_signed_32 (abfd, voff, contents + nraddr); | |
1022 | break; | |
1023 | ||
1024 | case R_SH_USES: | |
1025 | irel->r_offset += adjust; | |
1026 | break; | |
1027 | } | |
1028 | ||
1029 | if (overflow) | |
1030 | { | |
1031 | ((*_bfd_error_handler) | |
1032 | ("%s: 0x%lx: fatal: reloc overflow while relaxing", | |
1033 | bfd_get_filename (abfd), (unsigned long) irel->r_vaddr)); | |
1034 | bfd_set_error (bfd_error_bad_value); | |
1035 | return false; | |
1036 | } | |
1037 | } | |
1038 | ||
1039 | irel->r_vaddr = nraddr + sec->vma; | |
1040 | } | |
1041 | ||
1042 | /* Look through all the other sections. If there contain any IMM32 | |
1043 | relocs against internal symbols which we are not going to adjust | |
1044 | below, we may need to adjust the addends. */ | |
1045 | for (o = abfd->sections; o != NULL; o = o->next) | |
1046 | { | |
1047 | struct internal_reloc *internal_relocs; | |
1048 | struct internal_reloc *irelscan, *irelscanend; | |
1049 | bfd_byte *ocontents; | |
1050 | ||
1051 | if (o == sec | |
1052 | || (o->flags & SEC_RELOC) == 0 | |
1053 | || o->reloc_count == 0) | |
1054 | continue; | |
1055 | ||
1056 | /* We always cache the relocs. Perhaps, if info->keep_memory is | |
1057 | false, we should free them, if we are permitted to, when we | |
1058 | leave sh_coff_relax_section. */ | |
1059 | internal_relocs = (_bfd_coff_read_internal_relocs | |
1060 | (abfd, o, true, (bfd_byte *) NULL, false, | |
1061 | (struct internal_reloc *) NULL)); | |
1062 | if (internal_relocs == NULL) | |
1063 | return false; | |
1064 | ||
1065 | ocontents = NULL; | |
1066 | irelscanend = internal_relocs + o->reloc_count; | |
1067 | for (irelscan = internal_relocs; irelscan < irelscanend; irelscan++) | |
1068 | { | |
1069 | struct internal_syment sym; | |
1070 | ||
1071 | if (irelscan->r_type != R_SH_IMM32) | |
1072 | continue; | |
1073 | ||
1074 | bfd_coff_swap_sym_in (abfd, | |
1075 | ((bfd_byte *) obj_coff_external_syms (abfd) | |
1076 | + (irelscan->r_symndx | |
1077 | * bfd_coff_symesz (abfd))), | |
1078 | &sym); | |
1079 | if (sym.n_sclass != C_EXT | |
1080 | && sym.n_scnum == sec->target_index | |
ae115e51 ILT |
1081 | && ((bfd_vma) sym.n_value <= addr |
1082 | || (bfd_vma) sym.n_value >= toaddr)) | |
e0981b9b ILT |
1083 | { |
1084 | bfd_vma val; | |
1085 | ||
1086 | if (ocontents == NULL) | |
1087 | { | |
1088 | if (coff_section_data (abfd, o)->contents != NULL) | |
1089 | ocontents = coff_section_data (abfd, o)->contents; | |
1090 | else | |
1091 | { | |
1092 | /* We always cache the section contents. | |
1093 | Perhaps, if info->keep_memory is false, we | |
1094 | should free them, if we are permitted to, | |
1095 | when we leave sh_coff_relax_section. */ | |
1096 | ocontents = (bfd_byte *) malloc (o->_raw_size); | |
1097 | if (ocontents == NULL) | |
1098 | { | |
1099 | bfd_set_error (bfd_error_no_memory); | |
1100 | return false; | |
1101 | } | |
1102 | if (! bfd_get_section_contents (abfd, o, ocontents, | |
1103 | (file_ptr) 0, | |
1104 | o->_raw_size)) | |
1105 | return false; | |
1106 | coff_section_data (abfd, o)->contents = ocontents; | |
1107 | } | |
1108 | } | |
1109 | ||
1110 | val = bfd_get_32 (abfd, ocontents + irelscan->r_vaddr - o->vma); | |
1111 | val += sym.n_value; | |
1112 | if (val >= addr && val < toaddr) | |
1113 | bfd_put_32 (abfd, val - count, | |
1114 | ocontents + irelscan->r_vaddr - o->vma); | |
1115 | ||
1116 | coff_section_data (abfd, o)->keep_contents = true; | |
1117 | } | |
1118 | } | |
1119 | } | |
1120 | ||
1121 | /* Adjusting the internal symbols will not work if something has | |
1122 | already retrieved the generic symbols. It would be possible to | |
1123 | make this work by adjusting the generic symbols at the same time. | |
1124 | However, this case should not arise in normal usage. */ | |
1125 | if (obj_symbols (abfd) != NULL | |
1126 | || obj_raw_syments (abfd) != NULL) | |
1127 | { | |
1128 | ((*_bfd_error_handler) | |
1129 | ("%s: fatal: generic symbols retrieved before relaxing", | |
1130 | bfd_get_filename (abfd))); | |
1131 | bfd_set_error (bfd_error_invalid_operation); | |
1132 | return false; | |
1133 | } | |
1134 | ||
1135 | /* Adjust all the symbols. */ | |
1136 | sym_hash = obj_coff_sym_hashes (abfd); | |
1137 | symesz = bfd_coff_symesz (abfd); | |
1138 | esym = (bfd_byte *) obj_coff_external_syms (abfd); | |
1139 | esymend = esym + obj_raw_syment_count (abfd) * symesz; | |
1140 | while (esym < esymend) | |
1141 | { | |
1142 | struct internal_syment isym; | |
1143 | ||
1144 | bfd_coff_swap_sym_in (abfd, (PTR) esym, (PTR) &isym); | |
1145 | ||
1146 | if (isym.n_scnum == sec->target_index | |
ae115e51 ILT |
1147 | && (bfd_vma) isym.n_value > addr |
1148 | && (bfd_vma) isym.n_value < toaddr) | |
e0981b9b ILT |
1149 | { |
1150 | isym.n_value -= count; | |
1151 | ||
1152 | bfd_coff_swap_sym_out (abfd, (PTR) &isym, (PTR) esym); | |
1153 | ||
1154 | if (*sym_hash != NULL) | |
1155 | { | |
1156 | BFD_ASSERT ((*sym_hash)->root.type == bfd_link_hash_defined | |
1157 | || (*sym_hash)->root.type == bfd_link_hash_defweak); | |
1158 | BFD_ASSERT ((*sym_hash)->root.u.def.value >= addr | |
1159 | && (*sym_hash)->root.u.def.value < toaddr); | |
1160 | (*sym_hash)->root.u.def.value -= count; | |
1161 | } | |
1162 | } | |
1163 | ||
1164 | esym += (isym.n_numaux + 1) * symesz; | |
1165 | sym_hash += isym.n_numaux + 1; | |
1166 | } | |
1167 | ||
1168 | /* See if we can move the ALIGN reloc forward. We have adjusted | |
1169 | r_vaddr for it already. */ | |
1170 | if (irelalign != NULL) | |
1171 | { | |
1172 | bfd_vma alignaddr; | |
1173 | ||
1174 | alignaddr = BFD_ALIGN (irelalign->r_vaddr - sec->vma, | |
1175 | 1 << irelalign->r_offset); | |
1176 | if (alignaddr != toaddr) | |
1177 | { | |
1178 | /* Tail recursion. */ | |
1179 | return sh_relax_delete_bytes (abfd, sec, | |
1180 | irelalign->r_vaddr - sec->vma, | |
1181 | 1 << irelalign->r_offset); | |
1182 | } | |
1183 | } | |
1184 | ||
1185 | return true; | |
1186 | } | |
1187 | ||
1188 | /* This is a modification of _bfd_coff_generic_relocate_section, which | |
1189 | will handle SH relaxing. */ | |
1190 | ||
1191 | static boolean | |
1192 | sh_relocate_section (output_bfd, info, input_bfd, input_section, contents, | |
1193 | relocs, syms, sections) | |
cf345e36 SC |
1194 | bfd *output_bfd; |
1195 | struct bfd_link_info *info; | |
1196 | bfd *input_bfd; | |
1197 | asection *input_section; | |
1198 | bfd_byte *contents; | |
1199 | struct internal_reloc *relocs; | |
1200 | struct internal_syment *syms; | |
1201 | asection **sections; | |
1202 | { | |
1203 | struct internal_reloc *rel; | |
1204 | struct internal_reloc *relend; | |
1205 | ||
cf345e36 SC |
1206 | rel = relocs; |
1207 | relend = rel + input_section->reloc_count; | |
1208 | for (; rel < relend; rel++) | |
1209 | { | |
1210 | long symndx; | |
cf345e36 SC |
1211 | struct coff_link_hash_entry *h; |
1212 | struct internal_syment *sym; | |
e0981b9b | 1213 | bfd_vma addend; |
cf345e36 | 1214 | bfd_vma val; |
e0981b9b ILT |
1215 | reloc_howto_type *howto; |
1216 | bfd_reloc_status_type rstat; | |
1217 | ||
1218 | /* Almost all relocs have to do with relaxing. If any work must | |
1219 | be done for them, it has been done in sh_relax_section. */ | |
1220 | if (rel->r_type != R_SH_IMM32 | |
1221 | && rel->r_type != R_SH_PCDISP) | |
1222 | continue; | |
cf345e36 SC |
1223 | |
1224 | symndx = rel->r_symndx; | |
cf345e36 SC |
1225 | |
1226 | if (symndx == -1) | |
e0981b9b ILT |
1227 | { |
1228 | h = NULL; | |
1229 | sym = NULL; | |
1230 | } | |
cf345e36 | 1231 | else |
e0981b9b ILT |
1232 | { |
1233 | h = obj_coff_sym_hashes (input_bfd)[symndx]; | |
1234 | sym = syms + symndx; | |
1235 | } | |
cf345e36 | 1236 | |
e0981b9b ILT |
1237 | if (sym != NULL && sym->n_scnum != 0) |
1238 | addend = - sym->n_value; | |
1239 | else | |
1240 | addend = 0; | |
cf345e36 | 1241 | |
e0981b9b ILT |
1242 | if (rel->r_type == R_SH_PCDISP) |
1243 | addend -= 4; | |
1244 | ||
1245 | if (rel->r_type >= SH_COFF_HOWTO_COUNT) | |
1246 | howto = NULL; | |
1247 | else | |
1248 | howto = &sh_coff_howtos[rel->r_type]; | |
1249 | ||
1250 | if (howto == NULL) | |
1251 | { | |
1252 | bfd_set_error (bfd_error_bad_value); | |
1253 | return false; | |
1254 | } | |
1255 | ||
1256 | val = 0; | |
cf345e36 SC |
1257 | |
1258 | if (h == NULL) | |
1259 | { | |
e0981b9b ILT |
1260 | asection *sec; |
1261 | ||
1262 | /* There is nothing to do for an internal PCDISP reloc. */ | |
1263 | if (rel->r_type == R_SH_PCDISP) | |
1264 | continue; | |
1265 | ||
cf345e36 | 1266 | if (symndx == -1) |
e0981b9b ILT |
1267 | { |
1268 | sec = bfd_abs_section_ptr; | |
1269 | val = 0; | |
1270 | } | |
cf345e36 SC |
1271 | else |
1272 | { | |
cf345e36 | 1273 | sec = sections[symndx]; |
e0981b9b | 1274 | val = (sec->output_section->vma |
cf345e36 SC |
1275 | + sec->output_offset |
1276 | + sym->n_value | |
cf345e36 SC |
1277 | - sec->vma); |
1278 | } | |
1279 | } | |
1280 | else | |
1281 | { | |
e0981b9b ILT |
1282 | if (h->root.type == bfd_link_hash_defined |
1283 | || h->root.type == bfd_link_hash_defweak) | |
cf345e36 | 1284 | { |
e0981b9b ILT |
1285 | asection *sec; |
1286 | ||
cf345e36 SC |
1287 | sec = h->root.u.def.section; |
1288 | val = (h->root.u.def.value | |
1289 | + sec->output_section->vma | |
1290 | + sec->output_offset); | |
1291 | } | |
e0981b9b | 1292 | else if (! info->relocateable) |
cf345e36 SC |
1293 | { |
1294 | if (! ((*info->callbacks->undefined_symbol) | |
1295 | (info, h->root.root.string, input_bfd, input_section, | |
1296 | rel->r_vaddr - input_section->vma))) | |
1297 | return false; | |
1298 | } | |
1299 | } | |
1300 | ||
e0981b9b ILT |
1301 | rstat = _bfd_final_link_relocate (howto, input_bfd, input_section, |
1302 | contents, | |
1303 | rel->r_vaddr - input_section->vma, | |
1304 | val, addend); | |
1305 | ||
1306 | switch (rstat) | |
cf345e36 SC |
1307 | { |
1308 | default: | |
e0981b9b ILT |
1309 | abort (); |
1310 | case bfd_reloc_ok: | |
1311 | break; | |
1312 | case bfd_reloc_overflow: | |
cf345e36 | 1313 | { |
e0981b9b ILT |
1314 | const char *name; |
1315 | char buf[SYMNMLEN + 1]; | |
cf345e36 | 1316 | |
e0981b9b ILT |
1317 | if (symndx == -1) |
1318 | name = "*ABS*"; | |
1319 | else if (h != NULL) | |
1320 | name = h->root.root.string; | |
1321 | else if (sym->_n._n_n._n_zeroes == 0 | |
1322 | && sym->_n._n_n._n_offset != 0) | |
1323 | name = obj_coff_strings (input_bfd) + sym->_n._n_n._n_offset; | |
1324 | else | |
1325 | { | |
1326 | strncpy (buf, sym->_n._n_name, SYMNMLEN); | |
1327 | buf[SYMNMLEN] = '\0'; | |
1328 | name = buf; | |
1329 | } | |
cf345e36 | 1330 | |
e0981b9b ILT |
1331 | if (! ((*info->callbacks->reloc_overflow) |
1332 | (info, name, howto->name, (bfd_vma) 0, input_bfd, | |
1333 | input_section, rel->r_vaddr - input_section->vma))) | |
1334 | return false; | |
1335 | } | |
cf345e36 | 1336 | } |
e0981b9b | 1337 | } |
cf345e36 SC |
1338 | |
1339 | return true; | |
1340 | } | |
46dd0622 | 1341 | |
e0981b9b ILT |
1342 | /* This is a version of bfd_generic_get_relocated_section_contents |
1343 | which uses sh_relocate_section. */ | |
1344 | ||
1345 | static bfd_byte * | |
1346 | sh_coff_get_relocated_section_contents (output_bfd, link_info, link_order, | |
1347 | data, relocateable, symbols) | |
1348 | bfd *output_bfd; | |
1349 | struct bfd_link_info *link_info; | |
1350 | struct bfd_link_order *link_order; | |
1351 | bfd_byte *data; | |
1352 | boolean relocateable; | |
1353 | asymbol **symbols; | |
1354 | { | |
1355 | asection *input_section = link_order->u.indirect.section; | |
1356 | bfd *input_bfd = input_section->owner; | |
1357 | asection **sections = NULL; | |
1358 | struct internal_reloc *internal_relocs = NULL; | |
1359 | struct internal_syment *internal_syms = NULL; | |
1360 | ||
1361 | /* We only need to handle the case of relaxing, or of having a | |
1362 | particular set of section contents, specially. */ | |
1363 | if (relocateable | |
1364 | || coff_section_data (input_bfd, input_section) == NULL | |
1365 | || coff_section_data (input_bfd, input_section)->contents == NULL) | |
1366 | return bfd_generic_get_relocated_section_contents (output_bfd, link_info, | |
1367 | link_order, data, | |
1368 | relocateable, | |
1369 | symbols); | |
1370 | ||
1371 | memcpy (data, coff_section_data (input_bfd, input_section)->contents, | |
1372 | input_section->_raw_size); | |
1373 | ||
1374 | if ((input_section->flags & SEC_RELOC) != 0 | |
1375 | && input_section->reloc_count > 0) | |
1376 | { | |
1377 | bfd_size_type symesz = bfd_coff_symesz (input_bfd); | |
1378 | bfd_byte *esym, *esymend; | |
1379 | struct internal_syment *isymp; | |
1380 | asection **secpp; | |
1381 | ||
1382 | if (! _bfd_coff_get_external_symbols (input_bfd)) | |
1383 | goto error_return; | |
1384 | ||
1385 | internal_relocs = (_bfd_coff_read_internal_relocs | |
1386 | (input_bfd, input_section, false, (bfd_byte *) NULL, | |
1387 | false, (struct internal_reloc *) NULL)); | |
1388 | if (internal_relocs == NULL) | |
1389 | goto error_return; | |
1390 | ||
1391 | internal_syms = ((struct internal_syment *) | |
1392 | malloc (obj_raw_syment_count (input_bfd) | |
1393 | * sizeof (struct internal_syment))); | |
1394 | if (internal_syms == NULL) | |
1395 | { | |
1396 | bfd_set_error (bfd_error_no_memory); | |
1397 | goto error_return; | |
1398 | } | |
1399 | ||
1400 | sections = (asection **) malloc (obj_raw_syment_count (input_bfd) | |
1401 | * sizeof (asection *)); | |
1402 | if (sections == NULL) | |
1403 | { | |
1404 | bfd_set_error (bfd_error_no_memory); | |
1405 | goto error_return; | |
1406 | } | |
1407 | ||
1408 | isymp = internal_syms; | |
1409 | secpp = sections; | |
1410 | esym = (bfd_byte *) obj_coff_external_syms (input_bfd); | |
1411 | esymend = esym + obj_raw_syment_count (input_bfd) * symesz; | |
1412 | while (esym < esymend) | |
1413 | { | |
1414 | bfd_coff_swap_sym_in (input_bfd, (PTR) esym, (PTR) isymp); | |
1415 | ||
1416 | if (isymp->n_scnum != 0) | |
1417 | *secpp = coff_section_from_bfd_index (input_bfd, isymp->n_scnum); | |
1418 | else | |
1419 | { | |
1420 | if (isymp->n_value == 0) | |
1421 | *secpp = bfd_und_section_ptr; | |
1422 | else | |
1423 | *secpp = bfd_com_section_ptr; | |
1424 | } | |
1425 | ||
1426 | esym += (isymp->n_numaux + 1) * symesz; | |
1427 | secpp += isymp->n_numaux + 1; | |
1428 | isymp += isymp->n_numaux + 1; | |
1429 | } | |
1430 | ||
1431 | if (! sh_relocate_section (output_bfd, link_info, input_bfd, | |
1432 | input_section, data, internal_relocs, | |
1433 | internal_syms, sections)) | |
1434 | goto error_return; | |
1435 | ||
1436 | free (sections); | |
1437 | sections = NULL; | |
1438 | free (internal_syms); | |
1439 | internal_syms = NULL; | |
1440 | free (internal_relocs); | |
1441 | internal_relocs = NULL; | |
1442 | } | |
1443 | ||
1444 | return data; | |
1445 | ||
1446 | error_return: | |
1447 | if (internal_relocs != NULL) | |
1448 | free (internal_relocs); | |
1449 | if (internal_syms != NULL) | |
1450 | free (internal_syms); | |
1451 | if (sections != NULL) | |
1452 | free (sections); | |
1453 | return NULL; | |
1454 | } | |
1455 | ||
1456 | /* The target vectors. */ | |
46dd0622 | 1457 | |
2f3508ad | 1458 | const bfd_target shcoff_vec = |
46dd0622 SC |
1459 | { |
1460 | "coff-sh", /* name */ | |
1461 | bfd_target_coff_flavour, | |
1462 | true, /* data byte order is big */ | |
1463 | true, /* header byte order is big */ | |
1464 | ||
1465 | (HAS_RELOC | EXEC_P | /* object flags */ | |
1466 | HAS_LINENO | HAS_DEBUG | | |
e0981b9b | 1467 | HAS_SYMS | HAS_LOCALS | WP_TEXT | BFD_IS_RELAXABLE), |
46dd0622 | 1468 | |
e0981b9b | 1469 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), |
46dd0622 SC |
1470 | '_', /* leading symbol underscore */ |
1471 | '/', /* ar_pad_char */ | |
1472 | 15, /* ar_max_namelen */ | |
1473 | 2, /* minimum section alignment */ | |
e0981b9b ILT |
1474 | bfd_getb64, bfd_getb_signed_64, bfd_putb64, |
1475 | bfd_getb32, bfd_getb_signed_32, bfd_putb32, | |
1476 | bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */ | |
1477 | bfd_getb64, bfd_getb_signed_64, bfd_putb64, | |
1478 | bfd_getb32, bfd_getb_signed_32, bfd_putb32, | |
1479 | bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */ | |
46dd0622 SC |
1480 | |
1481 | {_bfd_dummy_target, coff_object_p, /* bfd_check_format */ | |
1482 | bfd_generic_archive_p, _bfd_dummy_target}, | |
1483 | {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */ | |
1484 | bfd_false}, | |
e0981b9b | 1485 | {bfd_false, coff_write_object_contents, /* bfd_write_contents */ |
46dd0622 SC |
1486 | _bfd_write_archive_contents, bfd_false}, |
1487 | ||
e0981b9b ILT |
1488 | BFD_JUMP_TABLE_GENERIC (coff), |
1489 | BFD_JUMP_TABLE_COPY (coff), | |
1490 | BFD_JUMP_TABLE_CORE (_bfd_nocore), | |
1491 | BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), | |
1492 | BFD_JUMP_TABLE_SYMBOLS (coff), | |
1493 | BFD_JUMP_TABLE_RELOCS (coff), | |
1494 | BFD_JUMP_TABLE_WRITE (coff), | |
1495 | BFD_JUMP_TABLE_LINK (coff), | |
1496 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), | |
1497 | ||
1498 | COFF_SWAP_TABLE, | |
46dd0622 | 1499 | }; |
cf345e36 | 1500 | |
7a1d4567 SC |
1501 | const bfd_target shlcoff_vec = |
1502 | { | |
1503 | "coff-shl", /* name */ | |
1504 | bfd_target_coff_flavour, | |
1505 | false, /* data byte order is little */ | |
1506 | false, /* header byte order is little endian too*/ | |
1507 | ||
1508 | (HAS_RELOC | EXEC_P | /* object flags */ | |
1509 | HAS_LINENO | HAS_DEBUG | | |
e0981b9b | 1510 | HAS_SYMS | HAS_LOCALS | WP_TEXT | BFD_IS_RELAXABLE), |
7a1d4567 | 1511 | |
e0981b9b | 1512 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), |
7a1d4567 SC |
1513 | '_', /* leading symbol underscore */ |
1514 | '/', /* ar_pad_char */ | |
1515 | 15, /* ar_max_namelen */ | |
1516 | 2, /* minimum section alignment */ | |
e0981b9b ILT |
1517 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, |
1518 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
1519 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ | |
1520 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, | |
1521 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
1522 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */ | |
1523 | ||
1524 | /* Note that we use a special archive recognizer. | |
1525 | This is so that we only use one archive format for both | |
1526 | object file types */ | |
7a1d4567 | 1527 | {_bfd_dummy_target, coff_object_p, /* bfd_check_format */ |
6e3acf74 | 1528 | _bfd_dummy_target, _bfd_dummy_target}, |
7a1d4567 SC |
1529 | {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */ |
1530 | bfd_false}, | |
e0981b9b | 1531 | {bfd_false, coff_write_object_contents, /* bfd_write_contents */ |
7a1d4567 SC |
1532 | _bfd_write_archive_contents, bfd_false}, |
1533 | ||
e0981b9b ILT |
1534 | BFD_JUMP_TABLE_GENERIC (coff), |
1535 | BFD_JUMP_TABLE_COPY (coff), | |
1536 | BFD_JUMP_TABLE_CORE (_bfd_nocore), | |
1537 | BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), | |
1538 | BFD_JUMP_TABLE_SYMBOLS (coff), | |
1539 | BFD_JUMP_TABLE_RELOCS (coff), | |
1540 | BFD_JUMP_TABLE_WRITE (coff), | |
1541 | BFD_JUMP_TABLE_LINK (coff), | |
1542 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), | |
7a1d4567 | 1543 | |
e0981b9b ILT |
1544 | COFF_SWAP_TABLE, |
1545 | }; |