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bfd/
[binutils.git] / bfd / mach-o.c
blob7baf87ba75d7c0f9a71dd8109a14088dfb1fdfa7
1 /* Mach-O support for BFD.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
3 Free Software Foundation, Inc.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
20
21 #include "mach-o.h"
22 #include "bfd.h"
23 #include "sysdep.h"
24 #include "libbfd.h"
25 #include "libiberty.h"
26 #include <ctype.h>
27
28 #ifndef BFD_IO_FUNCS
29 #define BFD_IO_FUNCS 0
30 #endif
31
32 #define bfd_mach_o_mkarchive _bfd_noarchive_mkarchive
33 #define bfd_mach_o_read_ar_hdr _bfd_noarchive_read_ar_hdr
34 #define bfd_mach_o_slurp_armap _bfd_noarchive_slurp_armap
35 #define bfd_mach_o_slurp_extended_name_table _bfd_noarchive_slurp_extended_name_table
36 #define bfd_mach_o_construct_extended_name_table _bfd_noarchive_construct_extended_name_table
37 #define bfd_mach_o_truncate_arname _bfd_noarchive_truncate_arname
38 #define bfd_mach_o_write_armap _bfd_noarchive_write_armap
39 #define bfd_mach_o_get_elt_at_index _bfd_noarchive_get_elt_at_index
40 #define bfd_mach_o_generic_stat_arch_elt _bfd_noarchive_generic_stat_arch_elt
41 #define bfd_mach_o_update_armap_timestamp _bfd_noarchive_update_armap_timestamp
42 #define bfd_mach_o_close_and_cleanup _bfd_generic_close_and_cleanup
43 #define bfd_mach_o_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
44 #define bfd_mach_o_new_section_hook _bfd_generic_new_section_hook
45 #define bfd_mach_o_get_section_contents_in_window _bfd_generic_get_section_contents_in_window
46 #define bfd_mach_o_bfd_is_local_label_name _bfd_nosymbols_bfd_is_local_label_name
47 #define bfd_mach_o_bfd_is_target_special_symbol ((bfd_boolean (*) (bfd *, asymbol *)) bfd_false)
48 #define bfd_mach_o_bfd_is_local_label_name _bfd_nosymbols_bfd_is_local_label_name
49 #define bfd_mach_o_get_lineno _bfd_nosymbols_get_lineno
50 #define bfd_mach_o_find_nearest_line _bfd_nosymbols_find_nearest_line
51 #define bfd_mach_o_find_inliner_info _bfd_nosymbols_find_inliner_info
52 #define bfd_mach_o_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
53 #define bfd_mach_o_read_minisymbols _bfd_generic_read_minisymbols
54 #define bfd_mach_o_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
55 #define bfd_mach_o_get_reloc_upper_bound _bfd_norelocs_get_reloc_upper_bound
56 #define bfd_mach_o_canonicalize_reloc _bfd_norelocs_canonicalize_reloc
57 #define bfd_mach_o_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
58 #define bfd_mach_o_bfd_get_relocated_section_contents bfd_generic_get_relocated_section_contents
59 #define bfd_mach_o_bfd_relax_section bfd_generic_relax_section
60 #define bfd_mach_o_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
61 #define bfd_mach_o_bfd_link_hash_table_free _bfd_generic_link_hash_table_free
62 #define bfd_mach_o_bfd_link_add_symbols _bfd_generic_link_add_symbols
63 #define bfd_mach_o_bfd_link_just_syms _bfd_generic_link_just_syms
64 #define bfd_mach_o_bfd_final_link _bfd_generic_final_link
65 #define bfd_mach_o_bfd_link_split_section _bfd_generic_link_split_section
66 #define bfd_mach_o_set_arch_mach bfd_default_set_arch_mach
67 #define bfd_mach_o_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data
68 #define bfd_mach_o_bfd_set_private_flags _bfd_generic_bfd_set_private_flags
69 #define bfd_mach_o_bfd_print_private_bfd_data _bfd_generic_bfd_print_private_bfd_data
70 #define bfd_mach_o_get_section_contents _bfd_generic_get_section_contents
71 #define bfd_mach_o_set_section_contents _bfd_generic_set_section_contents
72 #define bfd_mach_o_bfd_gc_sections bfd_generic_gc_sections
73 #define bfd_mach_o_bfd_merge_sections bfd_generic_merge_sections
74 #define bfd_mach_o_bfd_is_group_section bfd_generic_is_group_section
75 #define bfd_mach_o_bfd_discard_group bfd_generic_discard_group
76 #define bfd_mach_o_section_already_linked _bfd_generic_section_already_linked
77 #define bfd_mach_o_bfd_copy_private_header_data _bfd_generic_bfd_copy_private_header_data
78 #define bfd_mach_o_core_file_matches_executable_p generic_core_file_matches_executable_p
79
80
81 /* The flags field of a section structure is separated into two parts a section
82 type and section attributes. The section types are mutually exclusive (it
83 can only have one type) but the section attributes are not (it may have more
84 than one attribute). */
85
86 #define SECTION_TYPE 0x000000ff /* 256 section types. */
87 #define SECTION_ATTRIBUTES 0xffffff00 /* 24 section attributes. */
88
89 /* Constants for the section attributes part of the flags field of a section
90 structure. */
91
92 #define SECTION_ATTRIBUTES_USR 0xff000000 /* User-settable attributes. */
93 #define S_ATTR_PURE_INSTRUCTIONS 0x80000000 /* Section contains only true machine instructions. */
94 #define SECTION_ATTRIBUTES_SYS 0x00ffff00 /* System setable attributes. */
95 #define S_ATTR_SOME_INSTRUCTIONS 0x00000400 /* Section contains some machine instructions. */
96 #define S_ATTR_EXT_RELOC 0x00000200 /* Section has external relocation entries. */
97 #define S_ATTR_LOC_RELOC 0x00000100 /* Section has local relocation entries. */
98
99 #define N_STAB 0xe0
100 #define N_TYPE 0x1e
101 #define N_EXT 0x01
102 #define N_UNDF 0x0
103 #define N_ABS 0x2
104 #define N_SECT 0xe
105 #define N_INDR 0xa
106
107 bfd_boolean
108 bfd_mach_o_valid (bfd *abfd)
109 {
110 if (abfd == NULL || abfd->xvec == NULL)
111 return 0;
112
113 if (! ((abfd->xvec == &mach_o_be_vec)
114 || (abfd->xvec == &mach_o_le_vec)
115 || (abfd->xvec == &mach_o_fat_vec)))
116 return 0;
117
118 if (abfd->tdata.mach_o_data == NULL)
119 return 0;
120 return 1;
121 }
122
123 /* Copy any private info we understand from the input symbol
124 to the output symbol. */
125
126 static bfd_boolean
127 bfd_mach_o_bfd_copy_private_symbol_data (bfd *ibfd ATTRIBUTE_UNUSED,
128 asymbol *isymbol ATTRIBUTE_UNUSED,
129 bfd *obfd ATTRIBUTE_UNUSED,
130 asymbol *osymbol ATTRIBUTE_UNUSED)
131 {
132 return TRUE;
133 }
134
135 /* Copy any private info we understand from the input section
136 to the output section. */
137
138 static bfd_boolean
139 bfd_mach_o_bfd_copy_private_section_data (bfd *ibfd ATTRIBUTE_UNUSED,
140 asection *isection ATTRIBUTE_UNUSED,
141 bfd *obfd ATTRIBUTE_UNUSED,
142 asection *osection ATTRIBUTE_UNUSED)
143 {
144 return TRUE;
145 }
146
147 /* Copy any private info we understand from the input bfd
148 to the output bfd. */
149
150 static bfd_boolean
151 bfd_mach_o_bfd_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
152 {
153 BFD_ASSERT (bfd_mach_o_valid (ibfd));
154 BFD_ASSERT (bfd_mach_o_valid (obfd));
155
156 obfd->tdata.mach_o_data = ibfd->tdata.mach_o_data;
157 obfd->tdata.mach_o_data->ibfd = ibfd;
158 return TRUE;
159 }
160
161 static long
162 bfd_mach_o_count_symbols (bfd *abfd)
163 {
164 bfd_mach_o_data_struct *mdata = NULL;
165 long nsyms = 0;
166 unsigned long i;
167
168 BFD_ASSERT (bfd_mach_o_valid (abfd));
169 mdata = abfd->tdata.mach_o_data;
170
171 for (i = 0; i < mdata->header.ncmds; i++)
172 if (mdata->commands[i].type == BFD_MACH_O_LC_SYMTAB)
173 {
174 bfd_mach_o_symtab_command *sym = &mdata->commands[i].command.symtab;
175 nsyms += sym->nsyms;
176 }
177
178 return nsyms;
179 }
180
181 static long
182 bfd_mach_o_get_symtab_upper_bound (bfd *abfd)
183 {
184 long nsyms = bfd_mach_o_count_symbols (abfd);
185
186 if (nsyms < 0)
187 return nsyms;
188
189 return ((nsyms + 1) * sizeof (asymbol *));
190 }
191
192 static long
193 bfd_mach_o_canonicalize_symtab (bfd *abfd, asymbol **alocation)
194 {
195 bfd_mach_o_data_struct *mdata = abfd->tdata.mach_o_data;
196 long nsyms = bfd_mach_o_count_symbols (abfd);
197 asymbol **csym = alocation;
198 unsigned long i, j;
199
200 if (nsyms < 0)
201 return nsyms;
202
203 for (i = 0; i < mdata->header.ncmds; i++)
204 {
205 if (mdata->commands[i].type == BFD_MACH_O_LC_SYMTAB)
206 {
207 bfd_mach_o_symtab_command *sym = &mdata->commands[i].command.symtab;
208
209 if (bfd_mach_o_scan_read_symtab_symbols (abfd, &mdata->commands[i].command.symtab) != 0)
210 {
211 fprintf (stderr, "bfd_mach_o_canonicalize_symtab: unable to load symbols for section %lu\n", i);
212 return 0;
213 }
214
215 BFD_ASSERT (sym->symbols != NULL);
216
217 for (j = 0; j < sym->nsyms; j++)
218 {
219 BFD_ASSERT (csym < (alocation + nsyms));
220 *csym++ = &sym->symbols[j];
221 }
222 }
223 }
224
225 *csym++ = NULL;
226
227 return nsyms;
228 }
229
230 static void
231 bfd_mach_o_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
232 asymbol *symbol,
233 symbol_info *ret)
234 {
235 bfd_symbol_info (symbol, ret);
236 }
237
238 static void
239 bfd_mach_o_print_symbol (bfd *abfd,
240 PTR afile,
241 asymbol *symbol,
242 bfd_print_symbol_type how)
243 {
244 FILE *file = (FILE *) afile;
245
246 switch (how)
247 {
248 case bfd_print_symbol_name:
249 fprintf (file, "%s", symbol->name);
250 break;
251 default:
252 bfd_print_symbol_vandf (abfd, (PTR) file, symbol);
253 fprintf (file, " %-5s %s", symbol->section->name, symbol->name);
254 }
255 }
256
257 static void
258 bfd_mach_o_convert_architecture (bfd_mach_o_cpu_type mtype,
259 bfd_mach_o_cpu_subtype msubtype ATTRIBUTE_UNUSED,
260 enum bfd_architecture *type,
261 unsigned long *subtype)
262 {
263 *subtype = bfd_arch_unknown;
264
265 switch (mtype)
266 {
267 case BFD_MACH_O_CPU_TYPE_VAX: *type = bfd_arch_vax; break;
268 case BFD_MACH_O_CPU_TYPE_MC680x0: *type = bfd_arch_m68k; break;
269 case BFD_MACH_O_CPU_TYPE_I386: *type = bfd_arch_i386; break;
270 case BFD_MACH_O_CPU_TYPE_MIPS: *type = bfd_arch_mips; break;
271 case BFD_MACH_O_CPU_TYPE_MC98000: *type = bfd_arch_m98k; break;
272 case BFD_MACH_O_CPU_TYPE_HPPA: *type = bfd_arch_hppa; break;
273 case BFD_MACH_O_CPU_TYPE_ARM: *type = bfd_arch_arm; break;
274 case BFD_MACH_O_CPU_TYPE_MC88000: *type = bfd_arch_m88k; break;
275 case BFD_MACH_O_CPU_TYPE_SPARC: *type = bfd_arch_sparc; break;
276 case BFD_MACH_O_CPU_TYPE_I860: *type = bfd_arch_i860; break;
277 case BFD_MACH_O_CPU_TYPE_ALPHA: *type = bfd_arch_alpha; break;
278 case BFD_MACH_O_CPU_TYPE_POWERPC: *type = bfd_arch_powerpc; break;
279 default: *type = bfd_arch_unknown; break;
280 }
281
282 switch (*type)
283 {
284 case bfd_arch_i386: *subtype = bfd_mach_i386_i386; break;
285 case bfd_arch_sparc: *subtype = bfd_mach_sparc; break;
286 default:
287 *subtype = bfd_arch_unknown;
288 }
289 }
290
291 static int
292 bfd_mach_o_write_header (bfd *abfd, bfd_mach_o_header *header)
293 {
294 unsigned char buf[28];
295
296 bfd_h_put_32 (abfd, header->magic, buf + 0);
297 bfd_h_put_32 (abfd, header->cputype, buf + 4);
298 bfd_h_put_32 (abfd, header->cpusubtype, buf + 8);
299 bfd_h_put_32 (abfd, header->filetype, buf + 12);
300 bfd_h_put_32 (abfd, header->ncmds, buf + 16);
301 bfd_h_put_32 (abfd, header->sizeofcmds, buf + 20);
302 bfd_h_put_32 (abfd, header->flags, buf + 24);
303
304 bfd_seek (abfd, 0, SEEK_SET);
305 if (bfd_bwrite ((PTR) buf, 28, abfd) != 28)
306 return -1;
307
308 return 0;
309 }
310
311 static int
312 bfd_mach_o_scan_write_thread (bfd *abfd,
313 bfd_mach_o_load_command *command)
314 {
315 bfd_mach_o_thread_command *cmd = &command->command.thread;
316 unsigned int i;
317 unsigned char buf[8];
318 bfd_vma offset;
319 unsigned int nflavours;
320
321 BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD)
322 || (command->type == BFD_MACH_O_LC_UNIXTHREAD));
323
324 offset = 8;
325 nflavours = 0;
326 for (i = 0; i < cmd->nflavours; i++)
327 {
328 BFD_ASSERT ((cmd->flavours[i].size % 4) == 0);
329 BFD_ASSERT (cmd->flavours[i].offset == (command->offset + offset + 8));
330
331 bfd_h_put_32 (abfd, cmd->flavours[i].flavour, buf);
332 bfd_h_put_32 (abfd, (cmd->flavours[i].size / 4), buf + 4);
333
334 bfd_seek (abfd, command->offset + offset, SEEK_SET);
335 if (bfd_bwrite ((PTR) buf, 8, abfd) != 8)
336 return -1;
337
338 offset += cmd->flavours[i].size + 8;
339 }
340
341 return 0;
342 }
343
344 static int
345 bfd_mach_o_scan_write_section (bfd *abfd,
346 bfd_mach_o_section *section,
347 bfd_vma offset)
348 {
349 unsigned char buf[68];
350
351 memcpy (buf, section->sectname, 16);
352 memcpy (buf + 16, section->segname, 16);
353 bfd_h_put_32 (abfd, section->addr, buf + 32);
354 bfd_h_put_32 (abfd, section->size, buf + 36);
355 bfd_h_put_32 (abfd, section->offset, buf + 40);
356 bfd_h_put_32 (abfd, section->align, buf + 44);
357 bfd_h_put_32 (abfd, section->reloff, buf + 48);
358 bfd_h_put_32 (abfd, section->nreloc, buf + 52);
359 bfd_h_put_32 (abfd, section->flags, buf + 56);
360 /* bfd_h_put_32 (abfd, section->reserved1, buf + 60); */
361 /* bfd_h_put_32 (abfd, section->reserved2, buf + 64); */
362
363 bfd_seek (abfd, offset, SEEK_SET);
364 if (bfd_bwrite ((PTR) buf, 68, abfd) != 68)
365 return -1;
366
367 return 0;
368 }
369
370 static int
371 bfd_mach_o_scan_write_segment (bfd *abfd, bfd_mach_o_load_command *command)
372 {
373 unsigned char buf[48];
374 bfd_mach_o_segment_command *seg = &command->command.segment;
375 unsigned long i;
376
377 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT);
378
379 memcpy (buf, seg->segname, 16);
380 bfd_h_put_32 (abfd, seg->vmaddr, buf + 16);
381 bfd_h_put_32 (abfd, seg->vmsize, buf + 20);
382 bfd_h_put_32 (abfd, seg->fileoff, buf + 24);
383 bfd_h_put_32 (abfd, seg->filesize, buf + 28);
384 bfd_h_put_32 (abfd, 0 /* seg->maxprot */, buf + 32);
385 bfd_h_put_32 (abfd, 0 /* seg->initprot */, buf + 36);
386 bfd_h_put_32 (abfd, seg->nsects, buf + 40);
387 bfd_h_put_32 (abfd, seg->flags, buf + 44);
388
389 bfd_seek (abfd, command->offset + 8, SEEK_SET);
390 if (bfd_bwrite ((PTR) buf, 48, abfd) != 48)
391 return -1;
392
393 {
394 char buf[1024];
395 bfd_vma nbytes = seg->filesize;
396 bfd_vma curoff = seg->fileoff;
397
398 while (nbytes > 0)
399 {
400 bfd_vma thisread = nbytes;
401
402 if (thisread > 1024)
403 thisread = 1024;
404
405 bfd_seek (abfd, curoff, SEEK_SET);
406 if (bfd_bread ((PTR) buf, thisread, abfd) != thisread)
407 return -1;
408
409 bfd_seek (abfd, curoff, SEEK_SET);
410 if (bfd_bwrite ((PTR) buf, thisread, abfd) != thisread)
411 return -1;
412
413 nbytes -= thisread;
414 curoff += thisread;
415 }
416 }
417
418 for (i = 0; i < seg->nsects; i++)
419 {
420 bfd_vma segoff = command->offset + 48 + 8 + (i * 68);
421
422 if (bfd_mach_o_scan_write_section (abfd, &seg->sections[i], segoff) != 0)
423 return -1;
424 }
425
426 return 0;
427 }
428
429 static int
430 bfd_mach_o_scan_write_symtab_symbols (bfd *abfd,
431 bfd_mach_o_load_command *command)
432 {
433 bfd_mach_o_symtab_command *sym = &command->command.symtab;
434 asymbol *s = NULL;
435 unsigned long i;
436
437 for (i = 0; i < sym->nsyms; i++)
438 {
439 unsigned char buf[12];
440 bfd_vma symoff = sym->symoff + (i * 12);
441 unsigned char ntype = 0;
442 unsigned char nsect = 0;
443 short ndesc = 0;
444
445 s = &sym->symbols[i];
446
447 /* Instead just set from the stored values. */
448 ntype = (s->udata.i >> 24) & 0xff;
449 nsect = (s->udata.i >> 16) & 0xff;
450 ndesc = s->udata.i & 0xffff;
451
452 bfd_h_put_32 (abfd, s->name - sym->strtab, buf);
453 bfd_h_put_8 (abfd, ntype, buf + 4);
454 bfd_h_put_8 (abfd, nsect, buf + 5);
455 bfd_h_put_16 (abfd, ndesc, buf + 6);
456 bfd_h_put_32 (abfd, s->section->vma + s->value, buf + 8);
457
458 bfd_seek (abfd, symoff, SEEK_SET);
459 if (bfd_bwrite ((PTR) buf, 12, abfd) != 12)
460 {
461 fprintf (stderr, "bfd_mach_o_scan_write_symtab_symbols: unable to write %d bytes at %lu\n",
462 12, (unsigned long) symoff);
463 return -1;
464 }
465 }
466
467 return 0;
468 }
469
470 static int
471 bfd_mach_o_scan_write_symtab (bfd *abfd, bfd_mach_o_load_command *command)
472 {
473 bfd_mach_o_symtab_command *seg = &command->command.symtab;
474 unsigned char buf[16];
475
476 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB);
477
478 bfd_h_put_32 (abfd, seg->symoff, buf);
479 bfd_h_put_32 (abfd, seg->nsyms, buf + 4);
480 bfd_h_put_32 (abfd, seg->stroff, buf + 8);
481 bfd_h_put_32 (abfd, seg->strsize, buf + 12);
482
483 bfd_seek (abfd, command->offset + 8, SEEK_SET);
484 if (bfd_bwrite ((PTR) buf, 16, abfd) != 16)
485 return -1;
486
487 if (bfd_mach_o_scan_write_symtab_symbols (abfd, command) != 0)
488 return -1;
489
490 return 0;
491 }
492
493 static bfd_boolean
494 bfd_mach_o_write_contents (bfd *abfd)
495 {
496 unsigned int i;
497 asection *s;
498
499 bfd_mach_o_data_struct *mdata = abfd->tdata.mach_o_data;
500
501 /* Write data sections first in case they overlap header data to be
502 written later. */
503
504 for (s = abfd->sections; s != (asection *) NULL; s = s->next)
505 ;
506
507 /* Now write header information. */
508 if (bfd_mach_o_write_header (abfd, &mdata->header) != 0)
509 return FALSE;
510
511 for (i = 0; i < mdata->header.ncmds; i++)
512 {
513 unsigned char buf[8];
514 bfd_mach_o_load_command *cur = &mdata->commands[i];
515 unsigned long typeflag;
516
517 typeflag = cur->type_required ? cur->type & BFD_MACH_O_LC_REQ_DYLD : cur->type;
518
519 bfd_h_put_32 (abfd, typeflag, buf);
520 bfd_h_put_32 (abfd, cur->len, buf + 4);
521
522 bfd_seek (abfd, cur->offset, SEEK_SET);
523 if (bfd_bwrite ((PTR) buf, 8, abfd) != 8)
524 return FALSE;
525
526 switch (cur->type)
527 {
528 case BFD_MACH_O_LC_SEGMENT:
529 if (bfd_mach_o_scan_write_segment (abfd, cur) != 0)
530 return FALSE;
531 break;
532 case BFD_MACH_O_LC_SYMTAB:
533 if (bfd_mach_o_scan_write_symtab (abfd, cur) != 0)
534 return FALSE;
535 break;
536 case BFD_MACH_O_LC_SYMSEG:
537 break;
538 case BFD_MACH_O_LC_THREAD:
539 case BFD_MACH_O_LC_UNIXTHREAD:
540 if (bfd_mach_o_scan_write_thread (abfd, cur) != 0)
541 return FALSE;
542 break;
543 case BFD_MACH_O_LC_LOADFVMLIB:
544 case BFD_MACH_O_LC_IDFVMLIB:
545 case BFD_MACH_O_LC_IDENT:
546 case BFD_MACH_O_LC_FVMFILE:
547 case BFD_MACH_O_LC_PREPAGE:
548 case BFD_MACH_O_LC_DYSYMTAB:
549 case BFD_MACH_O_LC_LOAD_DYLIB:
550 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
551 case BFD_MACH_O_LC_ID_DYLIB:
552 case BFD_MACH_O_LC_LOAD_DYLINKER:
553 case BFD_MACH_O_LC_ID_DYLINKER:
554 case BFD_MACH_O_LC_PREBOUND_DYLIB:
555 case BFD_MACH_O_LC_ROUTINES:
556 case BFD_MACH_O_LC_SUB_FRAMEWORK:
557 break;
558 default:
559 fprintf (stderr,
560 "unable to write unknown load command 0x%lx\n",
561 (long) cur->type);
562 return FALSE;
563 }
564 }
565
566 return TRUE;
567 }
568
569 static int
570 bfd_mach_o_sizeof_headers (bfd *a ATTRIBUTE_UNUSED,
571 struct bfd_link_info *info ATTRIBUTE_UNUSED)
572 {
573 return 0;
574 }
575
576 /* Make an empty symbol. This is required only because
577 bfd_make_section_anyway wants to create a symbol for the section. */
578
579 static asymbol *
580 bfd_mach_o_make_empty_symbol (bfd *abfd)
581 {
582 asymbol *new;
583
584 new = bfd_zalloc (abfd, sizeof (* new));
585 if (new == NULL)
586 return new;
587 new->the_bfd = abfd;
588 return new;
589 }
590
591 static int
592 bfd_mach_o_read_header (bfd *abfd, bfd_mach_o_header *header)
593 {
594 unsigned char buf[28];
595 bfd_vma (*get32) (const void *) = NULL;
596
597 bfd_seek (abfd, 0, SEEK_SET);
598
599 if (bfd_bread ((PTR) buf, 28, abfd) != 28)
600 return -1;
601
602 if (bfd_getb32 (buf) == 0xfeedface)
603 {
604 header->byteorder = BFD_ENDIAN_BIG;
605 header->magic = 0xfeedface;
606 get32 = bfd_getb32;
607 }
608 else if (bfd_getl32 (buf) == 0xfeedface)
609 {
610 header->byteorder = BFD_ENDIAN_LITTLE;
611 header->magic = 0xfeedface;
612 get32 = bfd_getl32;
613 }
614 else
615 {
616 header->byteorder = BFD_ENDIAN_UNKNOWN;
617 return -1;
618 }
619
620 header->cputype = (*get32) (buf + 4);
621 header->cpusubtype = (*get32) (buf + 8);
622 header->filetype = (*get32) (buf + 12);
623 header->ncmds = (*get32) (buf + 16);
624 header->sizeofcmds = (*get32) (buf + 20);
625 header->flags = (*get32) (buf + 24);
626
627 return 0;
628 }
629
630 static asection *
631 bfd_mach_o_make_bfd_section (bfd *abfd, bfd_mach_o_section *section)
632 {
633 asection *bfdsec;
634 char *sname;
635 const char *prefix = "LC_SEGMENT";
636 unsigned int snamelen;
637 flagword flags;
638
639 snamelen = strlen (prefix) + 1
640 + strlen (section->segname) + 1
641 + strlen (section->sectname) + 1;
642
643 sname = bfd_alloc (abfd, snamelen);
644 if (sname == NULL)
645 return NULL;
646 sprintf (sname, "%s.%s.%s", prefix, section->segname, section->sectname);
647
648 flags = SEC_ALLOC;
649 if (!(section->flags & BFD_MACH_O_S_ZEROFILL))
650 flags = SEC_HAS_CONTENTS | SEC_LOAD | SEC_ALLOC | SEC_CODE;
651 bfdsec = bfd_make_section_anyway_with_flags (abfd, sname, flags);
652 if (bfdsec == NULL)
653 return NULL;
654
655 bfdsec->vma = section->addr;
656 bfdsec->lma = section->addr;
657 bfdsec->size = section->size;
658 bfdsec->filepos = section->offset;
659 bfdsec->alignment_power = section->align;
660
661 return bfdsec;
662 }
663
664 static int
665 bfd_mach_o_scan_read_section (bfd *abfd,
666 bfd_mach_o_section *section,
667 bfd_vma offset)
668 {
669 unsigned char buf[68];
670
671 bfd_seek (abfd, offset, SEEK_SET);
672 if (bfd_bread ((PTR) buf, 68, abfd) != 68)
673 return -1;
674
675 memcpy (section->sectname, buf, 16);
676 section->sectname[16] = '\0';
677 memcpy (section->segname, buf + 16, 16);
678 section->segname[16] = '\0';
679 section->addr = bfd_h_get_32 (abfd, buf + 32);
680 section->size = bfd_h_get_32 (abfd, buf + 36);
681 section->offset = bfd_h_get_32 (abfd, buf + 40);
682 section->align = bfd_h_get_32 (abfd, buf + 44);
683 section->reloff = bfd_h_get_32 (abfd, buf + 48);
684 section->nreloc = bfd_h_get_32 (abfd, buf + 52);
685 section->flags = bfd_h_get_32 (abfd, buf + 56);
686 section->reserved1 = bfd_h_get_32 (abfd, buf + 60);
687 section->reserved2 = bfd_h_get_32 (abfd, buf + 64);
688 section->bfdsection = bfd_mach_o_make_bfd_section (abfd, section);
689
690 if (section->bfdsection == NULL)
691 return -1;
692
693 return 0;
694 }
695
696 int
697 bfd_mach_o_scan_read_symtab_symbol (bfd *abfd,
698 bfd_mach_o_symtab_command *sym,
699 asymbol *s,
700 unsigned long i)
701 {
702 bfd_mach_o_data_struct *mdata = abfd->tdata.mach_o_data;
703 bfd_vma symoff = sym->symoff + (i * 12);
704 unsigned char buf[12];
705 unsigned char type = -1;
706 unsigned char section = -1;
707 short desc = -1;
708 unsigned long value = -1;
709 unsigned long stroff = -1;
710 unsigned int symtype = -1;
711
712 BFD_ASSERT (sym->strtab != NULL);
713
714 bfd_seek (abfd, symoff, SEEK_SET);
715 if (bfd_bread ((PTR) buf, 12, abfd) != 12)
716 {
717 fprintf (stderr, "bfd_mach_o_scan_read_symtab_symbol: unable to read %d bytes at %lu\n",
718 12, (unsigned long) symoff);
719 return -1;
720 }
721
722 stroff = bfd_h_get_32 (abfd, buf);
723 type = bfd_h_get_8 (abfd, buf + 4);
724 symtype = (type & 0x0e);
725 section = bfd_h_get_8 (abfd, buf + 5) - 1;
726 desc = bfd_h_get_16 (abfd, buf + 6);
727 value = bfd_h_get_32 (abfd, buf + 8);
728
729 if (stroff >= sym->strsize)
730 {
731 fprintf (stderr, "bfd_mach_o_scan_read_symtab_symbol: symbol name out of range (%lu >= %lu)\n",
732 (unsigned long) stroff, (unsigned long) sym->strsize);
733 return -1;
734 }
735
736 s->the_bfd = abfd;
737 s->name = sym->strtab + stroff;
738 s->value = value;
739 s->udata.i = (type << 24) | (section << 16) | desc;
740 s->flags = 0x0;
741
742 if (type & BFD_MACH_O_N_STAB)
743 {
744 s->flags |= BSF_DEBUGGING;
745 s->section = bfd_und_section_ptr;
746 }
747 else
748 {
749 if (type & BFD_MACH_O_N_PEXT)
750 {
751 type &= ~BFD_MACH_O_N_PEXT;
752 s->flags |= BSF_GLOBAL;
753 }
754
755 if (type & BFD_MACH_O_N_EXT)
756 {
757 type &= ~BFD_MACH_O_N_EXT;
758 s->flags |= BSF_GLOBAL;
759 }
760
761 switch (symtype)
762 {
763 case BFD_MACH_O_N_UNDF:
764 s->section = bfd_und_section_ptr;
765 break;
766 case BFD_MACH_O_N_PBUD:
767 s->section = bfd_und_section_ptr;
768 break;
769 case BFD_MACH_O_N_ABS:
770 s->section = bfd_abs_section_ptr;
771 break;
772 case BFD_MACH_O_N_SECT:
773 if ((section > 0) && (section <= mdata->nsects))
774 {
775 s->section = mdata->sections[section - 1]->bfdsection;
776 s->value = s->value - mdata->sections[section - 1]->addr;
777 }
778 else
779 {
780 /* Mach-O uses 0 to mean "no section"; not an error. */
781 if (section != 0)
782 {
783 fprintf (stderr, "bfd_mach_o_scan_read_symtab_symbol: "
784 "symbol \"%s\" specified invalid section %d (max %lu): setting to undefined\n",
785 s->name, section, mdata->nsects);
786 }
787 s->section = bfd_und_section_ptr;
788 }
789 break;
790 case BFD_MACH_O_N_INDR:
791 fprintf (stderr, "bfd_mach_o_scan_read_symtab_symbol: "
792 "symbol \"%s\" is unsupported 'indirect' reference: setting to undefined\n",
793 s->name);
794 s->section = bfd_und_section_ptr;
795 break;
796 default:
797 fprintf (stderr, "bfd_mach_o_scan_read_symtab_symbol: "
798 "symbol \"%s\" specified invalid type field 0x%x: setting to undefined\n",
799 s->name, symtype);
800 s->section = bfd_und_section_ptr;
801 break;
802 }
803 }
804
805 return 0;
806 }
807
808 int
809 bfd_mach_o_scan_read_symtab_strtab (bfd *abfd,
810 bfd_mach_o_symtab_command *sym)
811 {
812 BFD_ASSERT (sym->strtab == NULL);
813
814 if (abfd->flags & BFD_IN_MEMORY)
815 {
816 struct bfd_in_memory *b;
817
818 b = (struct bfd_in_memory *) abfd->iostream;
819
820 if ((sym->stroff + sym->strsize) > b->size)
821 {
822 bfd_set_error (bfd_error_file_truncated);
823 return -1;
824 }
825 sym->strtab = (char *) b->buffer + sym->stroff;
826 return 0;
827 }
828
829 sym->strtab = bfd_alloc (abfd, sym->strsize);
830 if (sym->strtab == NULL)
831 return -1;
832
833 bfd_seek (abfd, sym->stroff, SEEK_SET);
834 if (bfd_bread ((PTR) sym->strtab, sym->strsize, abfd) != sym->strsize)
835 {
836 fprintf (stderr, "bfd_mach_o_scan_read_symtab_strtab: unable to read %lu bytes at %lu\n",
837 sym->strsize, sym->stroff);
838 return -1;
839 }
840
841 return 0;
842 }
843
844 int
845 bfd_mach_o_scan_read_symtab_symbols (bfd *abfd,
846 bfd_mach_o_symtab_command *sym)
847 {
848 unsigned long i;
849 int ret;
850
851 BFD_ASSERT (sym->symbols == NULL);
852 sym->symbols = bfd_alloc (abfd, sym->nsyms * sizeof (asymbol));
853
854 if (sym->symbols == NULL)
855 {
856 fprintf (stderr, "bfd_mach_o_scan_read_symtab_symbols: unable to allocate memory for symbols\n");
857 return -1;
858 }
859
860 ret = bfd_mach_o_scan_read_symtab_strtab (abfd, sym);
861 if (ret != 0)
862 return ret;
863
864 for (i = 0; i < sym->nsyms; i++)
865 {
866 ret = bfd_mach_o_scan_read_symtab_symbol (abfd, sym, &sym->symbols[i], i);
867 if (ret != 0)
868 return ret;
869 }
870
871 return 0;
872 }
873
874 int
875 bfd_mach_o_scan_read_dysymtab_symbol (bfd *abfd,
876 bfd_mach_o_dysymtab_command *dysym,
877 bfd_mach_o_symtab_command *sym,
878 asymbol *s,
879 unsigned long i)
880 {
881 unsigned long isymoff = dysym->indirectsymoff + (i * 4);
882 unsigned long symindex;
883 unsigned char buf[4];
884
885 BFD_ASSERT (i < dysym->nindirectsyms);
886
887 bfd_seek (abfd, isymoff, SEEK_SET);
888 if (bfd_bread ((PTR) buf, 4, abfd) != 4)
889 {
890 fprintf (stderr, "bfd_mach_o_scan_read_dysymtab_symbol: unable to read %lu bytes at %lu\n",
891 (unsigned long) 4, isymoff);
892 return -1;
893 }
894 symindex = bfd_h_get_32 (abfd, buf);
895
896 return bfd_mach_o_scan_read_symtab_symbol (abfd, sym, s, symindex);
897 }
898
899 static const char *
900 bfd_mach_o_i386_flavour_string (unsigned int flavour)
901 {
902 switch ((int) flavour)
903 {
904 case BFD_MACH_O_i386_NEW_THREAD_STATE: return "i386_NEW_THREAD_STATE";
905 case BFD_MACH_O_i386_FLOAT_STATE: return "i386_FLOAT_STATE";
906 case BFD_MACH_O_i386_ISA_PORT_MAP_STATE: return "i386_ISA_PORT_MAP_STATE";
907 case BFD_MACH_O_i386_V86_ASSIST_STATE: return "i386_V86_ASSIST_STATE";
908 case BFD_MACH_O_i386_REGS_SEGS_STATE: return "i386_REGS_SEGS_STATE";
909 case BFD_MACH_O_i386_THREAD_SYSCALL_STATE: return "i386_THREAD_SYSCALL_STATE";
910 case BFD_MACH_O_i386_THREAD_STATE_NONE: return "i386_THREAD_STATE_NONE";
911 case BFD_MACH_O_i386_SAVED_STATE: return "i386_SAVED_STATE";
912 case BFD_MACH_O_i386_THREAD_STATE: return "i386_THREAD_STATE";
913 case BFD_MACH_O_i386_THREAD_FPSTATE: return "i386_THREAD_FPSTATE";
914 case BFD_MACH_O_i386_THREAD_EXCEPTSTATE: return "i386_THREAD_EXCEPTSTATE";
915 case BFD_MACH_O_i386_THREAD_CTHREADSTATE: return "i386_THREAD_CTHREADSTATE";
916 default: return "UNKNOWN";
917 }
918 }
919
920 static const char *
921 bfd_mach_o_ppc_flavour_string (unsigned int flavour)
922 {
923 switch ((int) flavour)
924 {
925 case BFD_MACH_O_PPC_THREAD_STATE: return "PPC_THREAD_STATE";
926 case BFD_MACH_O_PPC_FLOAT_STATE: return "PPC_FLOAT_STATE";
927 case BFD_MACH_O_PPC_EXCEPTION_STATE: return "PPC_EXCEPTION_STATE";
928 case BFD_MACH_O_PPC_VECTOR_STATE: return "PPC_VECTOR_STATE";
929 default: return "UNKNOWN";
930 }
931 }
932
933 static int
934 bfd_mach_o_scan_read_dylinker (bfd *abfd,
935 bfd_mach_o_load_command *command)
936 {
937 bfd_mach_o_dylinker_command *cmd = &command->command.dylinker;
938 unsigned char buf[4];
939 unsigned int nameoff;
940 asection *bfdsec;
941 char *sname;
942 const char *prefix;
943
944 BFD_ASSERT ((command->type == BFD_MACH_O_LC_ID_DYLINKER)
945 || (command->type == BFD_MACH_O_LC_LOAD_DYLINKER));
946
947 bfd_seek (abfd, command->offset + 8, SEEK_SET);
948 if (bfd_bread ((PTR) buf, 4, abfd) != 4)
949 return -1;
950
951 nameoff = bfd_h_get_32 (abfd, buf + 0);
952
953 cmd->name_offset = command->offset + nameoff;
954 cmd->name_len = command->len - nameoff;
955
956 if (command->type == BFD_MACH_O_LC_LOAD_DYLINKER)
957 prefix = "LC_LOAD_DYLINKER";
958 else if (command->type == BFD_MACH_O_LC_ID_DYLINKER)
959 prefix = "LC_ID_DYLINKER";
960 else
961 abort ();
962
963 sname = bfd_alloc (abfd, strlen (prefix) + 1);
964 if (sname == NULL)
965 return -1;
966 strcpy (sname, prefix);
967
968 bfdsec = bfd_make_section_anyway_with_flags (abfd, sname, SEC_HAS_CONTENTS);
969 if (bfdsec == NULL)
970 return -1;
971
972 bfdsec->vma = 0;
973 bfdsec->lma = 0;
974 bfdsec->size = command->len - 8;
975 bfdsec->filepos = command->offset + 8;
976 bfdsec->alignment_power = 0;
977
978 cmd->section = bfdsec;
979
980 return 0;
981 }
982
983 static int
984 bfd_mach_o_scan_read_dylib (bfd *abfd, bfd_mach_o_load_command *command)
985 {
986 bfd_mach_o_dylib_command *cmd = &command->command.dylib;
987 unsigned char buf[16];
988 unsigned int nameoff;
989 asection *bfdsec;
990 char *sname;
991 const char *prefix;
992
993 BFD_ASSERT ((command->type == BFD_MACH_O_LC_ID_DYLIB)
994 || (command->type == BFD_MACH_O_LC_LOAD_DYLIB)
995 || (command->type == BFD_MACH_O_LC_LOAD_WEAK_DYLIB));
996
997 bfd_seek (abfd, command->offset + 8, SEEK_SET);
998 if (bfd_bread ((PTR) buf, 16, abfd) != 16)
999 return -1;
1000
1001 nameoff = bfd_h_get_32 (abfd, buf + 0);
1002 cmd->timestamp = bfd_h_get_32 (abfd, buf + 4);
1003 cmd->current_version = bfd_h_get_32 (abfd, buf + 8);
1004 cmd->compatibility_version = bfd_h_get_32 (abfd, buf + 12);
1005
1006 cmd->name_offset = command->offset + nameoff;
1007 cmd->name_len = command->len - nameoff;
1008
1009 if (command->type == BFD_MACH_O_LC_LOAD_DYLIB)
1010 prefix = "LC_LOAD_DYLIB";
1011 else if (command->type == BFD_MACH_O_LC_LOAD_WEAK_DYLIB)
1012 prefix = "LC_LOAD_WEAK_DYLIB";
1013 else if (command->type == BFD_MACH_O_LC_ID_DYLIB)
1014 prefix = "LC_ID_DYLIB";
1015 else
1016 abort ();
1017
1018 sname = bfd_alloc (abfd, strlen (prefix) + 1);
1019 if (sname == NULL)
1020 return -1;
1021 strcpy (sname, prefix);
1022
1023 bfdsec = bfd_make_section_anyway_with_flags (abfd, sname, SEC_HAS_CONTENTS);
1024 if (bfdsec == NULL)
1025 return -1;
1026
1027 bfdsec->vma = 0;
1028 bfdsec->lma = 0;
1029 bfdsec->size = command->len - 8;
1030 bfdsec->filepos = command->offset + 8;
1031 bfdsec->alignment_power = 0;
1032
1033 cmd->section = bfdsec;
1034
1035 return 0;
1036 }
1037
1038 static int
1039 bfd_mach_o_scan_read_prebound_dylib (bfd *abfd ATTRIBUTE_UNUSED,
1040 bfd_mach_o_load_command *command ATTRIBUTE_UNUSED)
1041 {
1042 /* bfd_mach_o_prebound_dylib_command *cmd = &command->command.prebound_dylib; */
1043
1044 BFD_ASSERT (command->type == BFD_MACH_O_LC_PREBOUND_DYLIB);
1045 return 0;
1046 }
1047
1048 static int
1049 bfd_mach_o_scan_read_thread (bfd *abfd, bfd_mach_o_load_command *command)
1050 {
1051 bfd_mach_o_data_struct *mdata = NULL;
1052 bfd_mach_o_thread_command *cmd = &command->command.thread;
1053 unsigned char buf[8];
1054 bfd_vma offset;
1055 unsigned int nflavours;
1056 unsigned int i;
1057
1058 BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD)
1059 || (command->type == BFD_MACH_O_LC_UNIXTHREAD));
1060
1061 BFD_ASSERT (bfd_mach_o_valid (abfd));
1062 mdata = abfd->tdata.mach_o_data;
1063
1064 offset = 8;
1065 nflavours = 0;
1066 while (offset != command->len)
1067 {
1068 if (offset >= command->len)
1069 return -1;
1070
1071 bfd_seek (abfd, command->offset + offset, SEEK_SET);
1072
1073 if (bfd_bread ((PTR) buf, 8, abfd) != 8)
1074 return -1;
1075
1076 offset += 8 + bfd_h_get_32 (abfd, buf + 4) * 4;
1077 nflavours++;
1078 }
1079
1080 cmd->flavours = bfd_alloc (abfd, nflavours * sizeof (bfd_mach_o_thread_flavour));
1081 if (cmd->flavours == NULL)
1082 return -1;
1083 cmd->nflavours = nflavours;
1084
1085 offset = 8;
1086 nflavours = 0;
1087 while (offset != command->len)
1088 {
1089 if (offset >= command->len)
1090 return -1;
1091
1092 if (nflavours >= cmd->nflavours)
1093 return -1;
1094
1095 bfd_seek (abfd, command->offset + offset, SEEK_SET);
1096
1097 if (bfd_bread ((PTR) buf, 8, abfd) != 8)
1098 return -1;
1099
1100 cmd->flavours[nflavours].flavour = bfd_h_get_32 (abfd, buf);
1101 cmd->flavours[nflavours].offset = command->offset + offset + 8;
1102 cmd->flavours[nflavours].size = bfd_h_get_32 (abfd, buf + 4) * 4;
1103 offset += cmd->flavours[nflavours].size + 8;
1104 nflavours++;
1105 }
1106
1107 for (i = 0; i < nflavours; i++)
1108 {
1109 asection *bfdsec;
1110 unsigned int snamelen;
1111 char *sname;
1112 const char *flavourstr;
1113 const char *prefix = "LC_THREAD";
1114 unsigned int j = 0;
1115
1116 switch (mdata->header.cputype)
1117 {
1118 case BFD_MACH_O_CPU_TYPE_POWERPC:
1119 flavourstr = bfd_mach_o_ppc_flavour_string (cmd->flavours[i].flavour);
1120 break;
1121 case BFD_MACH_O_CPU_TYPE_I386:
1122 flavourstr = bfd_mach_o_i386_flavour_string (cmd->flavours[i].flavour);
1123 break;
1124 default:
1125 flavourstr = "UNKNOWN_ARCHITECTURE";
1126 break;
1127 }
1128
1129 snamelen = strlen (prefix) + 1 + 20 + 1 + strlen (flavourstr) + 1;
1130 sname = bfd_alloc (abfd, snamelen);
1131 if (sname == NULL)
1132 return -1;
1133
1134 for (;;)
1135 {
1136 sprintf (sname, "%s.%s.%u", prefix, flavourstr, j);
1137 if (bfd_get_section_by_name (abfd, sname) == NULL)
1138 break;
1139 j++;
1140 }
1141
1142 bfdsec = bfd_make_section_with_flags (abfd, sname, SEC_HAS_CONTENTS);
1143
1144 bfdsec->vma = 0;
1145 bfdsec->lma = 0;
1146 bfdsec->size = cmd->flavours[i].size;
1147 bfdsec->filepos = cmd->flavours[i].offset;
1148 bfdsec->alignment_power = 0x0;
1149
1150 cmd->section = bfdsec;
1151 }
1152
1153 return 0;
1154 }
1155
1156 static int
1157 bfd_mach_o_scan_read_dysymtab (bfd *abfd, bfd_mach_o_load_command *command)
1158 {
1159 bfd_mach_o_dysymtab_command *seg = &command->command.dysymtab;
1160 unsigned char buf[72];
1161
1162 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB);
1163
1164 bfd_seek (abfd, command->offset + 8, SEEK_SET);
1165 if (bfd_bread ((PTR) buf, 72, abfd) != 72)
1166 return -1;
1167
1168 seg->ilocalsym = bfd_h_get_32 (abfd, buf + 0);
1169 seg->nlocalsym = bfd_h_get_32 (abfd, buf + 4);
1170 seg->iextdefsym = bfd_h_get_32 (abfd, buf + 8);
1171 seg->nextdefsym = bfd_h_get_32 (abfd, buf + 12);
1172 seg->iundefsym = bfd_h_get_32 (abfd, buf + 16);
1173 seg->nundefsym = bfd_h_get_32 (abfd, buf + 20);
1174 seg->tocoff = bfd_h_get_32 (abfd, buf + 24);
1175 seg->ntoc = bfd_h_get_32 (abfd, buf + 28);
1176 seg->modtaboff = bfd_h_get_32 (abfd, buf + 32);
1177 seg->nmodtab = bfd_h_get_32 (abfd, buf + 36);
1178 seg->extrefsymoff = bfd_h_get_32 (abfd, buf + 40);
1179 seg->nextrefsyms = bfd_h_get_32 (abfd, buf + 44);
1180 seg->indirectsymoff = bfd_h_get_32 (abfd, buf + 48);
1181 seg->nindirectsyms = bfd_h_get_32 (abfd, buf + 52);
1182 seg->extreloff = bfd_h_get_32 (abfd, buf + 56);
1183 seg->nextrel = bfd_h_get_32 (abfd, buf + 60);
1184 seg->locreloff = bfd_h_get_32 (abfd, buf + 64);
1185 seg->nlocrel = bfd_h_get_32 (abfd, buf + 68);
1186
1187 return 0;
1188 }
1189
1190 static int
1191 bfd_mach_o_scan_read_symtab (bfd *abfd, bfd_mach_o_load_command *command)
1192 {
1193 bfd_mach_o_symtab_command *seg = &command->command.symtab;
1194 unsigned char buf[16];
1195 asection *bfdsec;
1196 char *sname;
1197 const char *prefix = "LC_SYMTAB.stabs";
1198
1199 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB);
1200
1201 bfd_seek (abfd, command->offset + 8, SEEK_SET);
1202 if (bfd_bread ((PTR) buf, 16, abfd) != 16)
1203 return -1;
1204
1205 seg->symoff = bfd_h_get_32 (abfd, buf);
1206 seg->nsyms = bfd_h_get_32 (abfd, buf + 4);
1207 seg->stroff = bfd_h_get_32 (abfd, buf + 8);
1208 seg->strsize = bfd_h_get_32 (abfd, buf + 12);
1209 seg->symbols = NULL;
1210 seg->strtab = NULL;
1211
1212 sname = bfd_alloc (abfd, strlen (prefix) + 1);
1213 if (sname == NULL)
1214 return -1;
1215 strcpy (sname, prefix);
1216
1217 bfdsec = bfd_make_section_anyway_with_flags (abfd, sname, SEC_HAS_CONTENTS);
1218 if (bfdsec == NULL)
1219 return -1;
1220
1221 bfdsec->vma = 0;
1222 bfdsec->lma = 0;
1223 bfdsec->size = seg->nsyms * 12;
1224 bfdsec->filepos = seg->symoff;
1225 bfdsec->alignment_power = 0;
1226
1227 seg->stabs_segment = bfdsec;
1228
1229 prefix = "LC_SYMTAB.stabstr";
1230 sname = bfd_alloc (abfd, strlen (prefix) + 1);
1231 if (sname == NULL)
1232 return -1;
1233 strcpy (sname, prefix);
1234
1235 bfdsec = bfd_make_section_anyway_with_flags (abfd, sname, SEC_HAS_CONTENTS);
1236 if (bfdsec == NULL)
1237 return -1;
1238
1239 bfdsec->vma = 0;
1240 bfdsec->lma = 0;
1241 bfdsec->size = seg->strsize;
1242 bfdsec->filepos = seg->stroff;
1243 bfdsec->alignment_power = 0;
1244
1245 seg->stabstr_segment = bfdsec;
1246
1247 return 0;
1248 }
1249
1250 static int
1251 bfd_mach_o_scan_read_segment (bfd *abfd, bfd_mach_o_load_command *command)
1252 {
1253 unsigned char buf[48];
1254 bfd_mach_o_segment_command *seg = &command->command.segment;
1255 unsigned long i;
1256 asection *bfdsec;
1257 char *sname;
1258 const char *prefix = "LC_SEGMENT";
1259 unsigned int snamelen;
1260 flagword flags;
1261
1262 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT);
1263
1264 bfd_seek (abfd, command->offset + 8, SEEK_SET);
1265 if (bfd_bread ((PTR) buf, 48, abfd) != 48)
1266 return -1;
1267
1268 memcpy (seg->segname, buf, 16);
1269 seg->vmaddr = bfd_h_get_32 (abfd, buf + 16);
1270 seg->vmsize = bfd_h_get_32 (abfd, buf + 20);
1271 seg->fileoff = bfd_h_get_32 (abfd, buf + 24);
1272 seg->filesize = bfd_h_get_32 (abfd, buf + 28);
1273 /* seg->maxprot = bfd_h_get_32 (abfd, buf + 32); */
1274 /* seg->initprot = bfd_h_get_32 (abfd, buf + 36); */
1275 seg->nsects = bfd_h_get_32 (abfd, buf + 40);
1276 seg->flags = bfd_h_get_32 (abfd, buf + 44);
1277
1278 snamelen = strlen (prefix) + 1 + strlen (seg->segname) + 1;
1279 sname = bfd_alloc (abfd, snamelen);
1280 if (sname == NULL)
1281 return -1;
1282 sprintf (sname, "%s.%s", prefix, seg->segname);
1283
1284 flags = SEC_HAS_CONTENTS | SEC_LOAD | SEC_ALLOC | SEC_CODE;
1285 bfdsec = bfd_make_section_anyway_with_flags (abfd, sname, flags);
1286 if (bfdsec == NULL)
1287 return -1;
1288
1289 bfdsec->vma = seg->vmaddr;
1290 bfdsec->lma = seg->vmaddr;
1291 bfdsec->size = seg->filesize;
1292 bfdsec->filepos = seg->fileoff;
1293 bfdsec->alignment_power = 0x0;
1294
1295 seg->segment = bfdsec;
1296
1297 if (seg->nsects != 0)
1298 {
1299 seg->sections = bfd_alloc (abfd, seg->nsects * sizeof (bfd_mach_o_section));
1300 if (seg->sections == NULL)
1301 return -1;
1302
1303 for (i = 0; i < seg->nsects; i++)
1304 {
1305 bfd_vma segoff = command->offset + 48 + 8 + (i * 68);
1306
1307 if (bfd_mach_o_scan_read_section (abfd, &seg->sections[i],
1308 segoff) != 0)
1309 return -1;
1310 }
1311 }
1312
1313 return 0;
1314 }
1315
1316 static int
1317 bfd_mach_o_scan_read_command (bfd *abfd, bfd_mach_o_load_command *command)
1318 {
1319 unsigned char buf[8];
1320
1321 bfd_seek (abfd, command->offset, SEEK_SET);
1322 if (bfd_bread ((PTR) buf, 8, abfd) != 8)
1323 return -1;
1324
1325 command->type = (bfd_h_get_32 (abfd, buf) & ~BFD_MACH_O_LC_REQ_DYLD);
1326 command->type_required = (bfd_h_get_32 (abfd, buf) & BFD_MACH_O_LC_REQ_DYLD
1327 ? 1 : 0);
1328 command->len = bfd_h_get_32 (abfd, buf + 4);
1329
1330 switch (command->type)
1331 {
1332 case BFD_MACH_O_LC_SEGMENT:
1333 if (bfd_mach_o_scan_read_segment (abfd, command) != 0)
1334 return -1;
1335 break;
1336 case BFD_MACH_O_LC_SYMTAB:
1337 if (bfd_mach_o_scan_read_symtab (abfd, command) != 0)
1338 return -1;
1339 break;
1340 case BFD_MACH_O_LC_SYMSEG:
1341 break;
1342 case BFD_MACH_O_LC_THREAD:
1343 case BFD_MACH_O_LC_UNIXTHREAD:
1344 if (bfd_mach_o_scan_read_thread (abfd, command) != 0)
1345 return -1;
1346 break;
1347 case BFD_MACH_O_LC_LOAD_DYLINKER:
1348 case BFD_MACH_O_LC_ID_DYLINKER:
1349 if (bfd_mach_o_scan_read_dylinker (abfd, command) != 0)
1350 return -1;
1351 break;
1352 case BFD_MACH_O_LC_LOAD_DYLIB:
1353 case BFD_MACH_O_LC_ID_DYLIB:
1354 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
1355 if (bfd_mach_o_scan_read_dylib (abfd, command) != 0)
1356 return -1;
1357 break;
1358 case BFD_MACH_O_LC_PREBOUND_DYLIB:
1359 if (bfd_mach_o_scan_read_prebound_dylib (abfd, command) != 0)
1360 return -1;
1361 break;
1362 case BFD_MACH_O_LC_LOADFVMLIB:
1363 case BFD_MACH_O_LC_IDFVMLIB:
1364 case BFD_MACH_O_LC_IDENT:
1365 case BFD_MACH_O_LC_FVMFILE:
1366 case BFD_MACH_O_LC_PREPAGE:
1367 case BFD_MACH_O_LC_ROUTINES:
1368 case BFD_MACH_O_LC_SUB_FRAMEWORK:
1369 break;
1370 case BFD_MACH_O_LC_DYSYMTAB:
1371 if (bfd_mach_o_scan_read_dysymtab (abfd, command) != 0)
1372 return -1;
1373 break;
1374 case BFD_MACH_O_LC_SUB_UMBRELLA:
1375 case BFD_MACH_O_LC_SUB_CLIENT:
1376 case BFD_MACH_O_LC_SUB_LIBRARY:
1377 case BFD_MACH_O_LC_TWOLEVEL_HINTS:
1378 case BFD_MACH_O_LC_PREBIND_CKSUM:
1379 break;
1380 default:
1381 fprintf (stderr, "unable to read unknown load command 0x%lx\n",
1382 (unsigned long) command->type);
1383 break;
1384 }
1385
1386 return 0;
1387 }
1388
1389 static void
1390 bfd_mach_o_flatten_sections (bfd *abfd)
1391 {
1392 bfd_mach_o_data_struct *mdata = abfd->tdata.mach_o_data;
1393 long csect = 0;
1394 unsigned long i, j;
1395
1396 mdata->nsects = 0;
1397
1398 for (i = 0; i < mdata->header.ncmds; i++)
1399 {
1400 if (mdata->commands[i].type == BFD_MACH_O_LC_SEGMENT)
1401 {
1402 bfd_mach_o_segment_command *seg;
1403
1404 seg = &mdata->commands[i].command.segment;
1405 mdata->nsects += seg->nsects;
1406 }
1407 }
1408
1409 mdata->sections = bfd_alloc (abfd,
1410 mdata->nsects * sizeof (bfd_mach_o_section *));
1411 csect = 0;
1412
1413 for (i = 0; i < mdata->header.ncmds; i++)
1414 {
1415 if (mdata->commands[i].type == BFD_MACH_O_LC_SEGMENT)
1416 {
1417 bfd_mach_o_segment_command *seg;
1418
1419 seg = &mdata->commands[i].command.segment;
1420 BFD_ASSERT (csect + seg->nsects <= mdata->nsects);
1421
1422 for (j = 0; j < seg->nsects; j++)
1423 mdata->sections[csect++] = &seg->sections[j];
1424 }
1425 }
1426 }
1427
1428 int
1429 bfd_mach_o_scan_start_address (bfd *abfd)
1430 {
1431 bfd_mach_o_data_struct *mdata = abfd->tdata.mach_o_data;
1432 bfd_mach_o_thread_command *cmd = NULL;
1433 unsigned long i;
1434
1435 for (i = 0; i < mdata->header.ncmds; i++)
1436 {
1437 if ((mdata->commands[i].type == BFD_MACH_O_LC_THREAD) ||
1438 (mdata->commands[i].type == BFD_MACH_O_LC_UNIXTHREAD))
1439 {
1440 if (cmd == NULL)
1441 cmd = &mdata->commands[i].command.thread;
1442 else
1443 return 0;
1444 }
1445 }
1446
1447 if (cmd == NULL)
1448 return 0;
1449
1450 for (i = 0; i < cmd->nflavours; i++)
1451 {
1452 if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_I386)
1453 && (cmd->flavours[i].flavour
1454 == (unsigned long) BFD_MACH_O_i386_THREAD_STATE))
1455 {
1456 unsigned char buf[4];
1457
1458 bfd_seek (abfd, cmd->flavours[i].offset + 40, SEEK_SET);
1459
1460 if (bfd_bread (buf, 4, abfd) != 4)
1461 return -1;
1462
1463 abfd->start_address = bfd_h_get_32 (abfd, buf);
1464 }
1465 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC)
1466 && (cmd->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE))
1467 {
1468 unsigned char buf[4];
1469
1470 bfd_seek (abfd, cmd->flavours[i].offset + 0, SEEK_SET);
1471
1472 if (bfd_bread (buf, 4, abfd) != 4)
1473 return -1;
1474
1475 abfd->start_address = bfd_h_get_32 (abfd, buf);
1476 }
1477 }
1478
1479 return 0;
1480 }
1481
1482 int
1483 bfd_mach_o_scan (bfd *abfd,
1484 bfd_mach_o_header *header,
1485 bfd_mach_o_data_struct *mdata)
1486 {
1487 unsigned int i;
1488 enum bfd_architecture cputype;
1489 unsigned long cpusubtype;
1490
1491 mdata->header = *header;
1492 mdata->symbols = NULL;
1493
1494 abfd->flags = (abfd->xvec->object_flags
1495 | (abfd->flags & (BFD_IN_MEMORY | BFD_IO_FUNCS)));
1496 abfd->tdata.mach_o_data = mdata;
1497
1498 bfd_mach_o_convert_architecture (header->cputype, header->cpusubtype,
1499 &cputype, &cpusubtype);
1500 if (cputype == bfd_arch_unknown)
1501 {
1502 fprintf (stderr, "bfd_mach_o_scan: unknown architecture 0x%lx/0x%lx\n",
1503 header->cputype, header->cpusubtype);
1504 return -1;
1505 }
1506
1507 bfd_set_arch_mach (abfd, cputype, cpusubtype);
1508
1509 if (header->ncmds != 0)
1510 {
1511 mdata->commands = bfd_alloc (abfd, header->ncmds * sizeof (bfd_mach_o_load_command));
1512 if (mdata->commands == NULL)
1513 return -1;
1514
1515 for (i = 0; i < header->ncmds; i++)
1516 {
1517 bfd_mach_o_load_command *cur = &mdata->commands[i];
1518
1519 if (i == 0)
1520 cur->offset = 28;
1521 else
1522 {
1523 bfd_mach_o_load_command *prev = &mdata->commands[i - 1];
1524 cur->offset = prev->offset + prev->len;
1525 }
1526
1527 if (bfd_mach_o_scan_read_command (abfd, cur) < 0)
1528 return -1;
1529 }
1530 }
1531
1532 if (bfd_mach_o_scan_start_address (abfd) < 0)
1533 return -1;
1534
1535 bfd_mach_o_flatten_sections (abfd);
1536 return 0;
1537 }
1538
1539 bfd_boolean
1540 bfd_mach_o_mkobject (bfd *abfd)
1541 {
1542 bfd_mach_o_data_struct *mdata = NULL;
1543
1544 mdata = bfd_alloc (abfd, sizeof (bfd_mach_o_data_struct));
1545 if (mdata == NULL)
1546 return FALSE;
1547 abfd->tdata.mach_o_data = mdata;
1548
1549 mdata->header.magic = 0;
1550 mdata->header.cputype = 0;
1551 mdata->header.cpusubtype = 0;
1552 mdata->header.filetype = 0;
1553 mdata->header.ncmds = 0;
1554 mdata->header.sizeofcmds = 0;
1555 mdata->header.flags = 0;
1556 mdata->header.byteorder = BFD_ENDIAN_UNKNOWN;
1557 mdata->commands = NULL;
1558 mdata->nsymbols = 0;
1559 mdata->symbols = NULL;
1560 mdata->nsects = 0;
1561 mdata->sections = NULL;
1562 mdata->ibfd = NULL;
1563
1564 return TRUE;
1565 }
1566
1567 const bfd_target *
1568 bfd_mach_o_object_p (bfd *abfd)
1569 {
1570 struct bfd_preserve preserve;
1571 bfd_mach_o_header header;
1572
1573 preserve.marker = NULL;
1574 if (bfd_mach_o_read_header (abfd, &header) != 0)
1575 goto wrong;
1576
1577 if (! (header.byteorder == BFD_ENDIAN_BIG
1578 || header.byteorder == BFD_ENDIAN_LITTLE))
1579 {
1580 fprintf (stderr, "unknown header byte-order value 0x%lx\n",
1581 (long) header.byteorder);
1582 goto wrong;
1583 }
1584
1585 if (! ((header.byteorder == BFD_ENDIAN_BIG
1586 && abfd->xvec->byteorder == BFD_ENDIAN_BIG
1587 && abfd->xvec->header_byteorder == BFD_ENDIAN_BIG)
1588 || (header.byteorder == BFD_ENDIAN_LITTLE
1589 && abfd->xvec->byteorder == BFD_ENDIAN_LITTLE
1590 && abfd->xvec->header_byteorder == BFD_ENDIAN_LITTLE)))
1591 goto wrong;
1592
1593 preserve.marker = bfd_zalloc (abfd, sizeof (bfd_mach_o_data_struct));
1594 if (preserve.marker == NULL
1595 || !bfd_preserve_save (abfd, &preserve))
1596 goto fail;
1597
1598 if (bfd_mach_o_scan (abfd, &header,
1599 (bfd_mach_o_data_struct *) preserve.marker) != 0)
1600 goto wrong;
1601
1602 bfd_preserve_finish (abfd, &preserve);
1603 return abfd->xvec;
1604
1605 wrong:
1606 bfd_set_error (bfd_error_wrong_format);
1607
1608 fail:
1609 if (preserve.marker != NULL)
1610 bfd_preserve_restore (abfd, &preserve);
1611 return NULL;
1612 }
1613
1614 const bfd_target *
1615 bfd_mach_o_core_p (bfd *abfd)
1616 {
1617 struct bfd_preserve preserve;
1618 bfd_mach_o_header header;
1619
1620 preserve.marker = NULL;
1621 if (bfd_mach_o_read_header (abfd, &header) != 0)
1622 goto wrong;
1623
1624 if (! (header.byteorder == BFD_ENDIAN_BIG
1625 || header.byteorder == BFD_ENDIAN_LITTLE))
1626 {
1627 fprintf (stderr, "unknown header byte-order value 0x%lx\n",
1628 (long) header.byteorder);
1629 abort ();
1630 }
1631
1632 if (! ((header.byteorder == BFD_ENDIAN_BIG
1633 && abfd->xvec->byteorder == BFD_ENDIAN_BIG
1634 && abfd->xvec->header_byteorder == BFD_ENDIAN_BIG)
1635 || (header.byteorder == BFD_ENDIAN_LITTLE
1636 && abfd->xvec->byteorder == BFD_ENDIAN_LITTLE
1637 && abfd->xvec->header_byteorder == BFD_ENDIAN_LITTLE)))
1638 goto wrong;
1639
1640 if (header.filetype != BFD_MACH_O_MH_CORE)
1641 goto wrong;
1642
1643 preserve.marker = bfd_zalloc (abfd, sizeof (bfd_mach_o_data_struct));
1644 if (preserve.marker == NULL
1645 || !bfd_preserve_save (abfd, &preserve))
1646 goto fail;
1647
1648 if (bfd_mach_o_scan (abfd, &header,
1649 (bfd_mach_o_data_struct *) preserve.marker) != 0)
1650 goto wrong;
1651
1652 bfd_preserve_finish (abfd, &preserve);
1653 return abfd->xvec;
1654
1655 wrong:
1656 bfd_set_error (bfd_error_wrong_format);
1657
1658 fail:
1659 if (preserve.marker != NULL)
1660 bfd_preserve_restore (abfd, &preserve);
1661 return NULL;
1662 }
1663
1664 typedef struct mach_o_fat_archentry
1665 {
1666 unsigned long cputype;
1667 unsigned long cpusubtype;
1668 unsigned long offset;
1669 unsigned long size;
1670 unsigned long align;
1671 bfd *abfd;
1672 } mach_o_fat_archentry;
1673
1674 typedef struct mach_o_fat_data_struct
1675 {
1676 unsigned long magic;
1677 unsigned long nfat_arch;
1678 mach_o_fat_archentry *archentries;
1679 } mach_o_fat_data_struct;
1680
1681 const bfd_target *
1682 bfd_mach_o_archive_p (bfd *abfd)
1683 {
1684 mach_o_fat_data_struct *adata = NULL;
1685 unsigned char buf[20];
1686 unsigned long i;
1687
1688 bfd_seek (abfd, 0, SEEK_SET);
1689 if (bfd_bread ((PTR) buf, 8, abfd) != 8)
1690 goto error;
1691
1692 adata = bfd_alloc (abfd, sizeof (mach_o_fat_data_struct));
1693 if (adata == NULL)
1694 goto error;
1695
1696 adata->magic = bfd_getb32 (buf);
1697 adata->nfat_arch = bfd_getb32 (buf + 4);
1698 if (adata->magic != 0xcafebabe)
1699 goto error;
1700
1701 adata->archentries =
1702 bfd_alloc (abfd, adata->nfat_arch * sizeof (mach_o_fat_archentry));
1703 if (adata->archentries == NULL)
1704 goto error;
1705
1706 for (i = 0; i < adata->nfat_arch; i++)
1707 {
1708 bfd_seek (abfd, 8 + 20 * i, SEEK_SET);
1709
1710 if (bfd_bread ((PTR) buf, 20, abfd) != 20)
1711 goto error;
1712 adata->archentries[i].cputype = bfd_getb32 (buf);
1713 adata->archentries[i].cpusubtype = bfd_getb32 (buf + 4);
1714 adata->archentries[i].offset = bfd_getb32 (buf + 8);
1715 adata->archentries[i].size = bfd_getb32 (buf + 12);
1716 adata->archentries[i].align = bfd_getb32 (buf + 16);
1717 adata->archentries[i].abfd = NULL;
1718 }
1719
1720 abfd->tdata.mach_o_fat_data = adata;
1721 return abfd->xvec;
1722
1723 error:
1724 if (adata != NULL)
1725 bfd_release (abfd, adata);
1726 bfd_set_error (bfd_error_wrong_format);
1727 return NULL;
1728 }
1729
1730 bfd *
1731 bfd_mach_o_openr_next_archived_file (bfd *archive, bfd *prev)
1732 {
1733 mach_o_fat_data_struct *adata;
1734 mach_o_fat_archentry *entry = NULL;
1735 unsigned long i;
1736
1737 adata = (mach_o_fat_data_struct *) archive->tdata.mach_o_fat_data;
1738 BFD_ASSERT (adata != NULL);
1739
1740 /* Find index of previous entry. */
1741 if (prev == NULL)
1742 i = 0; /* Start at first one. */
1743 else
1744 {
1745 for (i = 0; i < adata->nfat_arch; i++)
1746 {
1747 if (adata->archentries[i].abfd == prev)
1748 break;
1749 }
1750
1751 if (i == adata->nfat_arch)
1752 {
1753 /* Not found. */
1754 bfd_set_error (bfd_error_bad_value);
1755 return NULL;
1756 }
1757 i++; /* Get next entry. */
1758 }
1759
1760 if (i >= adata->nfat_arch)
1761 {
1762 bfd_set_error (bfd_error_no_more_archived_files);
1763 return NULL;
1764 }
1765
1766 entry = &adata->archentries[i];
1767 if (entry->abfd == NULL)
1768 {
1769 bfd *nbfd = _bfd_new_bfd_contained_in (archive);
1770 char *s = NULL;
1771
1772 if (nbfd == NULL)
1773 return NULL;
1774
1775 nbfd->origin = entry->offset;
1776 s = bfd_malloc (strlen (archive->filename) + 1);
1777 if (s == NULL)
1778 return NULL;
1779 strcpy (s, archive->filename);
1780 nbfd->filename = s;
1781 nbfd->iostream = NULL;
1782 entry->abfd = nbfd;
1783 }
1784
1785 return entry->abfd;
1786 }
1787
1788 int
1789 bfd_mach_o_lookup_section (bfd *abfd,
1790 asection *section,
1791 bfd_mach_o_load_command **mcommand,
1792 bfd_mach_o_section **msection)
1793 {
1794 struct mach_o_data_struct *md = abfd->tdata.mach_o_data;
1795 unsigned int i, j, num;
1796
1797 bfd_mach_o_load_command *ncmd = NULL;
1798 bfd_mach_o_section *nsect = NULL;
1799
1800 BFD_ASSERT (mcommand != NULL);
1801 BFD_ASSERT (msection != NULL);
1802
1803 num = 0;
1804 for (i = 0; i < md->header.ncmds; i++)
1805 {
1806 struct bfd_mach_o_load_command *cmd = &md->commands[i];
1807 struct bfd_mach_o_segment_command *seg = NULL;
1808
1809 if (cmd->type != BFD_MACH_O_LC_SEGMENT)
1810 continue;
1811 seg = &cmd->command.segment;
1812
1813 if (seg->segment == section)
1814 {
1815 if (num == 0)
1816 ncmd = cmd;
1817 num++;
1818 }
1819
1820 for (j = 0; j < seg->nsects; j++)
1821 {
1822 struct bfd_mach_o_section *sect = &seg->sections[j];
1823
1824 if (sect->bfdsection == section)
1825 {
1826 if (num == 0)
1827 nsect = sect;
1828 num++;
1829 }
1830 }
1831 }
1832
1833 *mcommand = ncmd;
1834 *msection = nsect;
1835 return num;
1836 }
1837
1838 int
1839 bfd_mach_o_lookup_command (bfd *abfd,
1840 bfd_mach_o_load_command_type type,
1841 bfd_mach_o_load_command **mcommand)
1842 {
1843 struct mach_o_data_struct *md = NULL;
1844 bfd_mach_o_load_command *ncmd = NULL;
1845 unsigned int i, num;
1846
1847 md = abfd->tdata.mach_o_data;
1848
1849 BFD_ASSERT (md != NULL);
1850 BFD_ASSERT (mcommand != NULL);
1851
1852 num = 0;
1853 for (i = 0; i < md->header.ncmds; i++)
1854 {
1855 struct bfd_mach_o_load_command *cmd = &md->commands[i];
1856
1857 if (cmd->type != type)
1858 continue;
1859
1860 if (num == 0)
1861 ncmd = cmd;
1862 num++;
1863 }
1864
1865 *mcommand = ncmd;
1866 return num;
1867 }
1868
1869 unsigned long
1870 bfd_mach_o_stack_addr (enum bfd_mach_o_cpu_type type)
1871 {
1872 switch (type)
1873 {
1874 case BFD_MACH_O_CPU_TYPE_MC680x0:
1875 return 0x04000000;
1876 case BFD_MACH_O_CPU_TYPE_MC88000:
1877 return 0xffffe000;
1878 case BFD_MACH_O_CPU_TYPE_POWERPC:
1879 return 0xc0000000;
1880 case BFD_MACH_O_CPU_TYPE_I386:
1881 return 0xc0000000;
1882 case BFD_MACH_O_CPU_TYPE_SPARC:
1883 return 0xf0000000;
1884 case BFD_MACH_O_CPU_TYPE_I860:
1885 return 0;
1886 case BFD_MACH_O_CPU_TYPE_HPPA:
1887 return 0xc0000000 - 0x04000000;
1888 default:
1889 return 0;
1890 }
1891 }
1892
1893 int
1894 bfd_mach_o_core_fetch_environment (bfd *abfd,
1895 unsigned char **rbuf,
1896 unsigned int *rlen)
1897 {
1898 bfd_mach_o_data_struct *mdata = abfd->tdata.mach_o_data;
1899 unsigned long stackaddr = bfd_mach_o_stack_addr (mdata->header.cputype);
1900 unsigned int i = 0;
1901
1902 for (i = 0; i < mdata->header.ncmds; i++)
1903 {
1904 bfd_mach_o_load_command *cur = &mdata->commands[i];
1905 bfd_mach_o_segment_command *seg = NULL;
1906
1907 if (cur->type != BFD_MACH_O_LC_SEGMENT)
1908 continue;
1909
1910 seg = &cur->command.segment;
1911
1912 if ((seg->vmaddr + seg->vmsize) == stackaddr)
1913 {
1914 unsigned long start = seg->fileoff;
1915 unsigned long end = seg->fileoff + seg->filesize;
1916 unsigned char *buf = bfd_malloc (1024);
1917 unsigned long size = 1024;
1918
1919 for (;;)
1920 {
1921 bfd_size_type nread = 0;
1922 unsigned long offset;
1923 int found_nonnull = 0;
1924
1925 if (size > (end - start))
1926 size = (end - start);
1927
1928 buf = bfd_realloc (buf, size);
1929
1930 bfd_seek (abfd, end - size, SEEK_SET);
1931 nread = bfd_bread (buf, size, abfd);
1932
1933 if (nread != size)
1934 return -1;
1935
1936 for (offset = 4; offset <= size; offset += 4)
1937 {
1938 unsigned long val;
1939
1940 val = *((unsigned long *) (buf + size - offset));
1941 if (! found_nonnull)
1942 {
1943 if (val != 0)
1944 found_nonnull = 1;
1945 }
1946 else if (val == 0x0)
1947 {
1948 unsigned long bottom;
1949 unsigned long top;
1950
1951 bottom = seg->fileoff + seg->filesize - offset;
1952 top = seg->fileoff + seg->filesize - 4;
1953 *rbuf = bfd_malloc (top - bottom);
1954 *rlen = top - bottom;
1955
1956 memcpy (*rbuf, buf + size - *rlen, *rlen);
1957 return 0;
1958 }
1959 }
1960
1961 if (size == (end - start))
1962 break;
1963
1964 size *= 2;
1965 }
1966 }
1967 }
1968
1969 return -1;
1970 }
1971
1972 char *
1973 bfd_mach_o_core_file_failing_command (bfd *abfd)
1974 {
1975 unsigned char *buf = NULL;
1976 unsigned int len = 0;
1977 int ret = -1;
1978
1979 ret = bfd_mach_o_core_fetch_environment (abfd, &buf, &len);
1980 if (ret < 0)
1981 return NULL;
1982
1983 return (char *) buf;
1984 }
1985
1986 int
1987 bfd_mach_o_core_file_failing_signal (bfd *abfd ATTRIBUTE_UNUSED)
1988 {
1989 return 0;
1990 }
1991
1992 #define TARGET_NAME mach_o_be_vec
1993 #define TARGET_STRING "mach-o-be"
1994 #define TARGET_BIG_ENDIAN 1
1995 #define TARGET_ARCHIVE 0
1996
1997 #include "mach-o-target.c"
1998
1999 #undef TARGET_NAME
2000 #undef TARGET_STRING
2001 #undef TARGET_BIG_ENDIAN
2002 #undef TARGET_ARCHIVE
2003
2004 #define TARGET_NAME mach_o_le_vec
2005 #define TARGET_STRING "mach-o-le"
2006 #define TARGET_BIG_ENDIAN 0
2007 #define TARGET_ARCHIVE 0
2008
2009 #include "mach-o-target.c"
2010
2011 #undef TARGET_NAME
2012 #undef TARGET_STRING
2013 #undef TARGET_BIG_ENDIAN
2014 #undef TARGET_ARCHIVE
2015
2016 #define TARGET_NAME mach_o_fat_vec
2017 #define TARGET_STRING "mach-o-fat"
2018 #define TARGET_BIG_ENDIAN 1
2019 #define TARGET_ARCHIVE 1
2020
2021 #include "mach-o-target.c"
2022
2023 #undef TARGET_NAME
2024 #undef TARGET_STRING
2025 #undef TARGET_BIG_ENDIAN
2026 #undef TARGET_ARCHIVE
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