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More fixes for memory access errors triggered by attemps to examine corrupted binaries.
[deliverable/binutils-gdb.git] / bfd / mach-o.c
1 /* Mach-O support for BFD.
2 Copyright (C) 1999-2014 Free Software Foundation, Inc.
3
4 This file is part of BFD, the Binary File Descriptor library.
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
20
21 #include "sysdep.h"
22 #include "mach-o.h"
23 #include "bfd.h"
24 #include "libbfd.h"
25 #include "libiberty.h"
26 #include "aout/stab_gnu.h"
27 #include "mach-o/reloc.h"
28 #include "mach-o/external.h"
29 #include <ctype.h>
30 #include <stdlib.h>
31 #include <string.h>
32
33 #define bfd_mach_o_object_p bfd_mach_o_gen_object_p
34 #define bfd_mach_o_core_p bfd_mach_o_gen_core_p
35 #define bfd_mach_o_mkobject bfd_mach_o_gen_mkobject
36
37 #define FILE_ALIGN(off, algn) \
38 (((off) + ((file_ptr) 1 << (algn)) - 1) & ((file_ptr) -1 << (algn)))
39
40 static bfd_boolean
41 bfd_mach_o_read_dyld_content (bfd *abfd, bfd_mach_o_dyld_info_command *cmd);
42
43 unsigned int
44 bfd_mach_o_version (bfd *abfd)
45 {
46 bfd_mach_o_data_struct *mdata = NULL;
47
48 BFD_ASSERT (bfd_mach_o_valid (abfd));
49 mdata = bfd_mach_o_get_data (abfd);
50
51 return mdata->header.version;
52 }
53
54 bfd_boolean
55 bfd_mach_o_valid (bfd *abfd)
56 {
57 if (abfd == NULL || abfd->xvec == NULL)
58 return FALSE;
59
60 if (abfd->xvec->flavour != bfd_target_mach_o_flavour)
61 return FALSE;
62
63 if (bfd_mach_o_get_data (abfd) == NULL)
64 return FALSE;
65 return TRUE;
66 }
67
68 static INLINE bfd_boolean
69 mach_o_wide_p (bfd_mach_o_header *header)
70 {
71 switch (header->version)
72 {
73 case 1:
74 return FALSE;
75 case 2:
76 return TRUE;
77 default:
78 BFD_FAIL ();
79 return FALSE;
80 }
81 }
82
83 static INLINE bfd_boolean
84 bfd_mach_o_wide_p (bfd *abfd)
85 {
86 return mach_o_wide_p (&bfd_mach_o_get_data (abfd)->header);
87 }
88
89 /* Tables to translate well known Mach-O segment/section names to bfd
90 names. Use of canonical names (such as .text or .debug_frame) is required
91 by gdb. */
92
93 /* __TEXT Segment. */
94 static const mach_o_section_name_xlat text_section_names_xlat[] =
95 {
96 { ".text", "__text",
97 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR,
98 BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS, 0},
99 { ".const", "__const",
100 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
101 BFD_MACH_O_S_ATTR_NONE, 0},
102 { ".static_const", "__static_const",
103 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
104 BFD_MACH_O_S_ATTR_NONE, 0},
105 { ".cstring", "__cstring",
106 SEC_READONLY | SEC_DATA | SEC_LOAD | SEC_MERGE | SEC_STRINGS,
107 BFD_MACH_O_S_CSTRING_LITERALS,
108 BFD_MACH_O_S_ATTR_NONE, 0},
109 { ".literal4", "__literal4",
110 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_4BYTE_LITERALS,
111 BFD_MACH_O_S_ATTR_NONE, 2},
112 { ".literal8", "__literal8",
113 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_8BYTE_LITERALS,
114 BFD_MACH_O_S_ATTR_NONE, 3},
115 { ".literal16", "__literal16",
116 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_16BYTE_LITERALS,
117 BFD_MACH_O_S_ATTR_NONE, 4},
118 { ".constructor", "__constructor",
119 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR,
120 BFD_MACH_O_S_ATTR_NONE, 0},
121 { ".destructor", "__destructor",
122 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR,
123 BFD_MACH_O_S_ATTR_NONE, 0},
124 { ".eh_frame", "__eh_frame",
125 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_COALESCED,
126 BFD_MACH_O_S_ATTR_LIVE_SUPPORT
127 | BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS
128 | BFD_MACH_O_S_ATTR_NO_TOC, 2},
129 { NULL, NULL, 0, 0, 0, 0}
130 };
131
132 /* __DATA Segment. */
133 static const mach_o_section_name_xlat data_section_names_xlat[] =
134 {
135 { ".data", "__data",
136 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
137 BFD_MACH_O_S_ATTR_NONE, 0},
138 { ".bss", "__bss",
139 SEC_NO_FLAGS, BFD_MACH_O_S_ZEROFILL,
140 BFD_MACH_O_S_ATTR_NONE, 0},
141 { ".const_data", "__const",
142 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
143 BFD_MACH_O_S_ATTR_NONE, 0},
144 { ".static_data", "__static_data",
145 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
146 BFD_MACH_O_S_ATTR_NONE, 0},
147 { ".mod_init_func", "__mod_init_func",
148 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS,
149 BFD_MACH_O_S_ATTR_NONE, 2},
150 { ".mod_term_func", "__mod_term_func",
151 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS,
152 BFD_MACH_O_S_ATTR_NONE, 2},
153 { ".dyld", "__dyld",
154 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
155 BFD_MACH_O_S_ATTR_NONE, 0},
156 { ".cfstring", "__cfstring",
157 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
158 BFD_MACH_O_S_ATTR_NONE, 2},
159 { NULL, NULL, 0, 0, 0, 0}
160 };
161
162 /* __DWARF Segment. */
163 static const mach_o_section_name_xlat dwarf_section_names_xlat[] =
164 {
165 { ".debug_frame", "__debug_frame",
166 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
167 BFD_MACH_O_S_ATTR_DEBUG, 0},
168 { ".debug_info", "__debug_info",
169 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
170 BFD_MACH_O_S_ATTR_DEBUG, 0},
171 { ".debug_abbrev", "__debug_abbrev",
172 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
173 BFD_MACH_O_S_ATTR_DEBUG, 0},
174 { ".debug_aranges", "__debug_aranges",
175 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
176 BFD_MACH_O_S_ATTR_DEBUG, 0},
177 { ".debug_macinfo", "__debug_macinfo",
178 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
179 BFD_MACH_O_S_ATTR_DEBUG, 0},
180 { ".debug_line", "__debug_line",
181 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
182 BFD_MACH_O_S_ATTR_DEBUG, 0},
183 { ".debug_loc", "__debug_loc",
184 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
185 BFD_MACH_O_S_ATTR_DEBUG, 0},
186 { ".debug_pubnames", "__debug_pubnames",
187 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
188 BFD_MACH_O_S_ATTR_DEBUG, 0},
189 { ".debug_pubtypes", "__debug_pubtypes",
190 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
191 BFD_MACH_O_S_ATTR_DEBUG, 0},
192 { ".debug_str", "__debug_str",
193 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
194 BFD_MACH_O_S_ATTR_DEBUG, 0},
195 { ".debug_ranges", "__debug_ranges",
196 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
197 BFD_MACH_O_S_ATTR_DEBUG, 0},
198 { ".debug_macro", "__debug_macro",
199 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
200 BFD_MACH_O_S_ATTR_DEBUG, 0},
201 { ".debug_gdb_scripts", "__debug_gdb_scri",
202 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
203 BFD_MACH_O_S_ATTR_DEBUG, 0},
204 { NULL, NULL, 0, 0, 0, 0}
205 };
206
207 /* __OBJC Segment. */
208 static const mach_o_section_name_xlat objc_section_names_xlat[] =
209 {
210 { ".objc_class", "__class",
211 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
212 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
213 { ".objc_meta_class", "__meta_class",
214 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
215 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
216 { ".objc_cat_cls_meth", "__cat_cls_meth",
217 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
218 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
219 { ".objc_cat_inst_meth", "__cat_inst_meth",
220 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
221 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
222 { ".objc_protocol", "__protocol",
223 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
224 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
225 { ".objc_string_object", "__string_object",
226 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
227 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
228 { ".objc_cls_meth", "__cls_meth",
229 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
230 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
231 { ".objc_inst_meth", "__inst_meth",
232 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
233 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
234 { ".objc_cls_refs", "__cls_refs",
235 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LITERAL_POINTERS,
236 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
237 { ".objc_message_refs", "__message_refs",
238 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LITERAL_POINTERS,
239 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
240 { ".objc_symbols", "__symbols",
241 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
242 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
243 { ".objc_category", "__category",
244 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
245 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
246 { ".objc_class_vars", "__class_vars",
247 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
248 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
249 { ".objc_instance_vars", "__instance_vars",
250 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
251 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
252 { ".objc_module_info", "__module_info",
253 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
254 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
255 { ".objc_selector_strs", "__selector_strs",
256 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_CSTRING_LITERALS,
257 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
258 { ".objc_image_info", "__image_info",
259 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
260 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
261 { ".objc_selector_fixup", "__sel_fixup",
262 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
263 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
264 /* Objc V1 */
265 { ".objc1_class_ext", "__class_ext",
266 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
267 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
268 { ".objc1_property_list", "__property",
269 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
270 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
271 { ".objc1_protocol_ext", "__protocol_ext",
272 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
273 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
274 { NULL, NULL, 0, 0, 0, 0}
275 };
276
277 static const mach_o_segment_name_xlat segsec_names_xlat[] =
278 {
279 { "__TEXT", text_section_names_xlat },
280 { "__DATA", data_section_names_xlat },
281 { "__DWARF", dwarf_section_names_xlat },
282 { "__OBJC", objc_section_names_xlat },
283 { NULL, NULL }
284 };
285
286 static const char dsym_subdir[] = ".dSYM/Contents/Resources/DWARF";
287
288 /* For both cases bfd-name => mach-o name and vice versa, the specific target
289 is checked before the generic. This allows a target (e.g. ppc for cstring)
290 to override the generic definition with a more specific one. */
291
292 /* Fetch the translation from a Mach-O section designation (segment, section)
293 as a bfd short name, if one exists. Otherwise return NULL.
294
295 Allow the segment and section names to be unterminated 16 byte arrays. */
296
297 const mach_o_section_name_xlat *
298 bfd_mach_o_section_data_for_mach_sect (bfd *abfd, const char *segname,
299 const char *sectname)
300 {
301 const struct mach_o_segment_name_xlat *seg;
302 const mach_o_section_name_xlat *sec;
303 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
304
305 /* First try any target-specific translations defined... */
306 if (bed->segsec_names_xlat)
307 for (seg = bed->segsec_names_xlat; seg->segname; seg++)
308 if (strncmp (seg->segname, segname, BFD_MACH_O_SEGNAME_SIZE) == 0)
309 for (sec = seg->sections; sec->mach_o_name; sec++)
310 if (strncmp (sec->mach_o_name, sectname,
311 BFD_MACH_O_SECTNAME_SIZE) == 0)
312 return sec;
313
314 /* ... and then the Mach-O generic ones. */
315 for (seg = segsec_names_xlat; seg->segname; seg++)
316 if (strncmp (seg->segname, segname, BFD_MACH_O_SEGNAME_SIZE) == 0)
317 for (sec = seg->sections; sec->mach_o_name; sec++)
318 if (strncmp (sec->mach_o_name, sectname,
319 BFD_MACH_O_SECTNAME_SIZE) == 0)
320 return sec;
321
322 return NULL;
323 }
324
325 /* If the bfd_name for this section is a 'canonical' form for which we
326 know the Mach-O data, return the segment name and the data for the
327 Mach-O equivalent. Otherwise return NULL. */
328
329 const mach_o_section_name_xlat *
330 bfd_mach_o_section_data_for_bfd_name (bfd *abfd, const char *bfd_name,
331 const char **segname)
332 {
333 const struct mach_o_segment_name_xlat *seg;
334 const mach_o_section_name_xlat *sec;
335 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
336 *segname = NULL;
337
338 if (bfd_name[0] != '.')
339 return NULL;
340
341 /* First try any target-specific translations defined... */
342 if (bed->segsec_names_xlat)
343 for (seg = bed->segsec_names_xlat; seg->segname; seg++)
344 for (sec = seg->sections; sec->bfd_name; sec++)
345 if (strcmp (bfd_name, sec->bfd_name) == 0)
346 {
347 *segname = seg->segname;
348 return sec;
349 }
350
351 /* ... and then the Mach-O generic ones. */
352 for (seg = segsec_names_xlat; seg->segname; seg++)
353 for (sec = seg->sections; sec->bfd_name; sec++)
354 if (strcmp (bfd_name, sec->bfd_name) == 0)
355 {
356 *segname = seg->segname;
357 return sec;
358 }
359
360 return NULL;
361 }
362
363 /* Convert Mach-O section name to BFD.
364
365 Try to use standard/canonical names, for which we have tables including
366 default flag settings - which are returned. Otherwise forge a new name
367 in the form "<segmentname>.<sectionname>" this will be prefixed with
368 LC_SEGMENT. if the segment name does not begin with an underscore.
369
370 SEGNAME and SECTNAME are 16 byte arrays (they do not need to be NUL-
371 terminated if the name length is exactly 16 bytes - but must be if the name
372 length is less than 16 characters). */
373
374 void
375 bfd_mach_o_convert_section_name_to_bfd (bfd *abfd, const char *segname,
376 const char *secname, const char **name,
377 flagword *flags)
378 {
379 const mach_o_section_name_xlat *xlat;
380 char *res;
381 unsigned int len;
382 const char *pfx = "";
383
384 *name = NULL;
385 *flags = SEC_NO_FLAGS;
386
387 /* First search for a canonical name...
388 xlat will be non-null if there is an entry for segname, secname. */
389 xlat = bfd_mach_o_section_data_for_mach_sect (abfd, segname, secname);
390 if (xlat)
391 {
392 len = strlen (xlat->bfd_name);
393 res = bfd_alloc (abfd, len+1);
394 if (res == NULL)
395 return;
396 memcpy (res, xlat->bfd_name, len+1);
397 *name = res;
398 *flags = xlat->bfd_flags;
399 return;
400 }
401
402 /* ... else we make up a bfd name from the segment concatenated with the
403 section. */
404
405 len = 16 + 1 + 16 + 1;
406
407 /* Put "LC_SEGMENT." prefix if the segment name is weird (ie doesn't start
408 with an underscore. */
409 if (segname[0] != '_')
410 {
411 static const char seg_pfx[] = "LC_SEGMENT.";
412
413 pfx = seg_pfx;
414 len += sizeof (seg_pfx) - 1;
415 }
416
417 res = bfd_alloc (abfd, len);
418 if (res == NULL)
419 return;
420 snprintf (res, len, "%s%.16s.%.16s", pfx, segname, secname);
421 *name = res;
422 }
423
424 /* Convert a bfd section name to a Mach-O segment + section name.
425
426 If the name is a canonical one for which we have a Darwin match
427 return the translation table - which contains defaults for flags,
428 type, attribute and default alignment data.
429
430 Otherwise, expand the bfd_name (assumed to be in the form
431 "[LC_SEGMENT.]<segmentname>.<sectionname>") and return NULL. */
432
433 static const mach_o_section_name_xlat *
434 bfd_mach_o_convert_section_name_to_mach_o (bfd *abfd ATTRIBUTE_UNUSED,
435 asection *sect,
436 bfd_mach_o_section *section)
437 {
438 const mach_o_section_name_xlat *xlat;
439 const char *name = bfd_get_section_name (abfd, sect);
440 const char *segname;
441 const char *dot;
442 unsigned int len;
443 unsigned int seglen;
444 unsigned int seclen;
445
446 memset (section->segname, 0, BFD_MACH_O_SEGNAME_SIZE + 1);
447 memset (section->sectname, 0, BFD_MACH_O_SECTNAME_SIZE + 1);
448
449 /* See if is a canonical name ... */
450 xlat = bfd_mach_o_section_data_for_bfd_name (abfd, name, &segname);
451 if (xlat)
452 {
453 strcpy (section->segname, segname);
454 strcpy (section->sectname, xlat->mach_o_name);
455 return xlat;
456 }
457
458 /* .. else we convert our constructed one back to Mach-O.
459 Strip LC_SEGMENT. prefix, if present. */
460 if (strncmp (name, "LC_SEGMENT.", 11) == 0)
461 name += 11;
462
463 /* Find a dot. */
464 dot = strchr (name, '.');
465 len = strlen (name);
466
467 /* Try to split name into segment and section names. */
468 if (dot && dot != name)
469 {
470 seglen = dot - name;
471 seclen = len - (dot + 1 - name);
472
473 if (seglen <= BFD_MACH_O_SEGNAME_SIZE
474 && seclen <= BFD_MACH_O_SECTNAME_SIZE)
475 {
476 memcpy (section->segname, name, seglen);
477 section->segname[seglen] = 0;
478 memcpy (section->sectname, dot + 1, seclen);
479 section->sectname[seclen] = 0;
480 return NULL;
481 }
482 }
483
484 /* The segment and section names are both missing - don't make them
485 into dots. */
486 if (dot && dot == name)
487 return NULL;
488
489 /* Just duplicate the name into both segment and section. */
490 if (len > 16)
491 len = 16;
492 memcpy (section->segname, name, len);
493 section->segname[len] = 0;
494 memcpy (section->sectname, name, len);
495 section->sectname[len] = 0;
496 return NULL;
497 }
498
499 /* Return the size of an entry for section SEC.
500 Must be called only for symbol pointer section and symbol stubs
501 sections. */
502
503 unsigned int
504 bfd_mach_o_section_get_entry_size (bfd *abfd, bfd_mach_o_section *sec)
505 {
506 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
507 {
508 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
509 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
510 return bfd_mach_o_wide_p (abfd) ? 8 : 4;
511 case BFD_MACH_O_S_SYMBOL_STUBS:
512 return sec->reserved2;
513 default:
514 BFD_FAIL ();
515 return 0;
516 }
517 }
518
519 /* Return the number of indirect symbols for a section.
520 Must be called only for symbol pointer section and symbol stubs
521 sections. */
522
523 unsigned int
524 bfd_mach_o_section_get_nbr_indirect (bfd *abfd, bfd_mach_o_section *sec)
525 {
526 unsigned int elsz;
527
528 elsz = bfd_mach_o_section_get_entry_size (abfd, sec);
529 if (elsz == 0)
530 return 0;
531 else
532 return sec->size / elsz;
533 }
534
535 /* Append command CMD to ABFD. Note that header.ncmds is not updated. */
536
537 static void
538 bfd_mach_o_append_command (bfd *abfd, bfd_mach_o_load_command *cmd)
539 {
540 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
541
542 if (mdata->last_command != NULL)
543 mdata->last_command->next = cmd;
544 else
545 mdata->first_command = cmd;
546 mdata->last_command = cmd;
547 cmd->next = NULL;
548 }
549
550 /* Copy any private info we understand from the input symbol
551 to the output symbol. */
552
553 bfd_boolean
554 bfd_mach_o_bfd_copy_private_symbol_data (bfd *ibfd ATTRIBUTE_UNUSED,
555 asymbol *isymbol,
556 bfd *obfd ATTRIBUTE_UNUSED,
557 asymbol *osymbol)
558 {
559 bfd_mach_o_asymbol *os, *is;
560
561 os = (bfd_mach_o_asymbol *)osymbol;
562 is = (bfd_mach_o_asymbol *)isymbol;
563 os->n_type = is->n_type;
564 os->n_sect = is->n_sect;
565 os->n_desc = is->n_desc;
566 os->symbol.udata.i = is->symbol.udata.i;
567
568 return TRUE;
569 }
570
571 /* Copy any private info we understand from the input section
572 to the output section. */
573
574 bfd_boolean
575 bfd_mach_o_bfd_copy_private_section_data (bfd *ibfd, asection *isection,
576 bfd *obfd, asection *osection)
577 {
578 bfd_mach_o_section *os = bfd_mach_o_get_mach_o_section (osection);
579 bfd_mach_o_section *is = bfd_mach_o_get_mach_o_section (isection);
580
581 if (ibfd->xvec->flavour != bfd_target_mach_o_flavour
582 || obfd->xvec->flavour != bfd_target_mach_o_flavour)
583 return TRUE;
584
585 BFD_ASSERT (is != NULL && os != NULL);
586
587 os->flags = is->flags;
588 os->reserved1 = is->reserved1;
589 os->reserved2 = is->reserved2;
590 os->reserved3 = is->reserved3;
591
592 return TRUE;
593 }
594
595 /* Copy any private info we understand from the input bfd
596 to the output bfd. */
597
598 bfd_boolean
599 bfd_mach_o_bfd_copy_private_header_data (bfd *ibfd, bfd *obfd)
600 {
601 bfd_mach_o_data_struct *imdata;
602 bfd_mach_o_data_struct *omdata;
603 bfd_mach_o_load_command *icmd;
604
605 if (bfd_get_flavour (ibfd) != bfd_target_mach_o_flavour
606 || bfd_get_flavour (obfd) != bfd_target_mach_o_flavour)
607 return TRUE;
608
609 BFD_ASSERT (bfd_mach_o_valid (ibfd));
610 BFD_ASSERT (bfd_mach_o_valid (obfd));
611
612 imdata = bfd_mach_o_get_data (ibfd);
613 omdata = bfd_mach_o_get_data (obfd);
614
615 /* Copy header flags. */
616 omdata->header.flags = imdata->header.flags;
617
618 /* Copy commands. */
619 for (icmd = imdata->first_command; icmd != NULL; icmd = icmd->next)
620 {
621 bfd_mach_o_load_command *ocmd;
622
623 switch (icmd->type)
624 {
625 case BFD_MACH_O_LC_LOAD_DYLIB:
626 case BFD_MACH_O_LC_LOAD_DYLINKER:
627 case BFD_MACH_O_LC_DYLD_INFO:
628 /* Command is copied. */
629 ocmd = bfd_alloc (obfd, sizeof (bfd_mach_o_load_command));
630 if (ocmd == NULL)
631 return FALSE;
632
633 /* Copy common fields. */
634 ocmd->type = icmd->type;
635 ocmd->type_required = icmd->type_required;
636 ocmd->offset = 0;
637 ocmd->len = icmd->len;
638 break;
639
640 default:
641 /* Command is not copied. */
642 continue;
643 break;
644 }
645
646 switch (icmd->type)
647 {
648 case BFD_MACH_O_LC_LOAD_DYLIB:
649 {
650 bfd_mach_o_dylib_command *idy = &icmd->command.dylib;
651 bfd_mach_o_dylib_command *ody = &ocmd->command.dylib;
652
653 ody->name_offset = idy->name_offset;
654 ody->timestamp = idy->timestamp;
655 ody->current_version = idy->current_version;
656 ody->compatibility_version = idy->compatibility_version;
657 ody->name_str = idy->name_str;
658 }
659 break;
660
661 case BFD_MACH_O_LC_LOAD_DYLINKER:
662 {
663 bfd_mach_o_dylinker_command *idy = &icmd->command.dylinker;
664 bfd_mach_o_dylinker_command *ody = &ocmd->command.dylinker;
665
666 ody->name_offset = idy->name_offset;
667 ody->name_str = idy->name_str;
668 }
669 break;
670
671 case BFD_MACH_O_LC_DYLD_INFO:
672 {
673 bfd_mach_o_dyld_info_command *idy = &icmd->command.dyld_info;
674 bfd_mach_o_dyld_info_command *ody = &ocmd->command.dyld_info;
675
676 if (bfd_mach_o_read_dyld_content (ibfd, idy))
677 {
678 ody->rebase_size = idy->rebase_size;
679 ody->rebase_content = idy->rebase_content;
680
681 ody->bind_size = idy->bind_size;
682 ody->bind_content = idy->bind_content;
683
684 ody->weak_bind_size = idy->weak_bind_size;
685 ody->weak_bind_content = idy->weak_bind_content;
686
687 ody->lazy_bind_size = idy->lazy_bind_size;
688 ody->lazy_bind_content = idy->lazy_bind_content;
689
690 ody->export_size = idy->export_size;
691 ody->export_content = idy->export_content;
692 }
693 }
694 break;
695
696 default:
697 /* That command should be handled. */
698 abort ();
699 }
700
701 /* Insert command. */
702 bfd_mach_o_append_command (obfd, ocmd);
703 }
704
705 return TRUE;
706 }
707
708 /* This allows us to set up to 32 bits of flags (unless we invent some
709 fiendish scheme to subdivide). For now, we'll just set the file flags
710 without error checking - just overwrite. */
711
712 bfd_boolean
713 bfd_mach_o_bfd_set_private_flags (bfd *abfd, flagword flags)
714 {
715 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
716
717 if (!mdata)
718 return FALSE;
719
720 mdata->header.flags = flags;
721 return TRUE;
722 }
723
724 /* Count the total number of symbols. */
725
726 static long
727 bfd_mach_o_count_symbols (bfd *abfd)
728 {
729 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
730
731 if (mdata->symtab == NULL)
732 return 0;
733 return mdata->symtab->nsyms;
734 }
735
736 long
737 bfd_mach_o_get_symtab_upper_bound (bfd *abfd)
738 {
739 long nsyms = bfd_mach_o_count_symbols (abfd);
740
741 return ((nsyms + 1) * sizeof (asymbol *));
742 }
743
744 long
745 bfd_mach_o_canonicalize_symtab (bfd *abfd, asymbol **alocation)
746 {
747 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
748 long nsyms = bfd_mach_o_count_symbols (abfd);
749 bfd_mach_o_symtab_command *sym = mdata->symtab;
750 unsigned long j;
751
752 if (nsyms < 0)
753 return nsyms;
754
755 if (nsyms == 0)
756 {
757 /* Do not try to read symbols if there are none. */
758 alocation[0] = NULL;
759 return 0;
760 }
761
762 if (!bfd_mach_o_read_symtab_symbols (abfd))
763 {
764 (*_bfd_error_handler)
765 (_("bfd_mach_o_canonicalize_symtab: unable to load symbols"));
766 return 0;
767 }
768
769 BFD_ASSERT (sym->symbols != NULL);
770
771 for (j = 0; j < sym->nsyms; j++)
772 alocation[j] = &sym->symbols[j].symbol;
773
774 alocation[j] = NULL;
775
776 return nsyms;
777 }
778
779 /* Create synthetic symbols for indirect symbols. */
780
781 long
782 bfd_mach_o_get_synthetic_symtab (bfd *abfd,
783 long symcount ATTRIBUTE_UNUSED,
784 asymbol **syms ATTRIBUTE_UNUSED,
785 long dynsymcount ATTRIBUTE_UNUSED,
786 asymbol **dynsyms ATTRIBUTE_UNUSED,
787 asymbol **ret)
788 {
789 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
790 bfd_mach_o_dysymtab_command *dysymtab = mdata->dysymtab;
791 bfd_mach_o_symtab_command *symtab = mdata->symtab;
792 asymbol *s;
793 unsigned long count, i, j, n;
794 size_t size;
795 char *names;
796 char *nul_name;
797
798 *ret = NULL;
799
800 /* Stop now if no symbols or no indirect symbols. */
801 if (dysymtab == NULL || symtab == NULL || symtab->symbols == NULL)
802 return 0;
803
804 if (dysymtab->nindirectsyms == 0)
805 return 0;
806
807 /* We need to allocate a bfd symbol for every indirect symbol and to
808 allocate the memory for its name. */
809 count = dysymtab->nindirectsyms;
810 size = count * sizeof (asymbol) + 1;
811
812 for (j = 0; j < count; j++)
813 {
814 unsigned int isym = dysymtab->indirect_syms[j];
815
816 /* Some indirect symbols are anonymous. */
817 if (isym < symtab->nsyms && symtab->symbols[isym].symbol.name)
818 size += strlen (symtab->symbols[isym].symbol.name) + sizeof ("$stub");
819 }
820
821 s = *ret = (asymbol *) bfd_malloc (size);
822 if (s == NULL)
823 return -1;
824 names = (char *) (s + count);
825 nul_name = names;
826 *names++ = 0;
827
828 n = 0;
829 for (i = 0; i < mdata->nsects; i++)
830 {
831 bfd_mach_o_section *sec = mdata->sections[i];
832 unsigned int first, last;
833 bfd_vma addr;
834 bfd_vma entry_size;
835
836 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
837 {
838 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
839 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
840 case BFD_MACH_O_S_SYMBOL_STUBS:
841 /* Only these sections have indirect symbols. */
842 first = sec->reserved1;
843 last = first + bfd_mach_o_section_get_nbr_indirect (abfd, sec);
844 addr = sec->addr;
845 entry_size = bfd_mach_o_section_get_entry_size (abfd, sec);
846 for (j = first; j < last; j++)
847 {
848 unsigned int isym = dysymtab->indirect_syms[j];
849
850 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
851 s->section = sec->bfdsection;
852 s->value = addr - sec->addr;
853 s->udata.p = NULL;
854
855 if (isym < symtab->nsyms
856 && symtab->symbols[isym].symbol.name)
857 {
858 const char *sym = symtab->symbols[isym].symbol.name;
859 size_t len;
860
861 s->name = names;
862 len = strlen (sym);
863 memcpy (names, sym, len);
864 names += len;
865 memcpy (names, "$stub", sizeof ("$stub"));
866 names += sizeof ("$stub");
867 }
868 else
869 s->name = nul_name;
870
871 addr += entry_size;
872 s++;
873 n++;
874 }
875 break;
876 default:
877 break;
878 }
879 }
880
881 return n;
882 }
883
884 void
885 bfd_mach_o_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
886 asymbol *symbol,
887 symbol_info *ret)
888 {
889 bfd_symbol_info (symbol, ret);
890 }
891
892 void
893 bfd_mach_o_print_symbol (bfd *abfd,
894 void * afile,
895 asymbol *symbol,
896 bfd_print_symbol_type how)
897 {
898 FILE *file = (FILE *) afile;
899 const char *name;
900 bfd_mach_o_asymbol *asym = (bfd_mach_o_asymbol *)symbol;
901
902 switch (how)
903 {
904 case bfd_print_symbol_name:
905 fprintf (file, "%s", symbol->name);
906 break;
907 default:
908 bfd_print_symbol_vandf (abfd, (void *) file, symbol);
909 if (asym->n_type & BFD_MACH_O_N_STAB)
910 name = bfd_get_stab_name (asym->n_type);
911 else
912 switch (asym->n_type & BFD_MACH_O_N_TYPE)
913 {
914 case BFD_MACH_O_N_UNDF:
915 if (symbol->value == 0)
916 name = "UND";
917 else
918 name = "COM";
919 break;
920 case BFD_MACH_O_N_ABS:
921 name = "ABS";
922 break;
923 case BFD_MACH_O_N_INDR:
924 name = "INDR";
925 break;
926 case BFD_MACH_O_N_PBUD:
927 name = "PBUD";
928 break;
929 case BFD_MACH_O_N_SECT:
930 name = "SECT";
931 break;
932 default:
933 name = "???";
934 break;
935 }
936 if (name == NULL)
937 name = "";
938 fprintf (file, " %02x %-6s %02x %04x",
939 asym->n_type, name, asym->n_sect, asym->n_desc);
940 if ((asym->n_type & BFD_MACH_O_N_STAB) == 0
941 && (asym->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_SECT)
942 fprintf (file, " [%s]", symbol->section->name);
943 fprintf (file, " %s", symbol->name);
944 }
945 }
946
947 static void
948 bfd_mach_o_convert_architecture (bfd_mach_o_cpu_type mtype,
949 bfd_mach_o_cpu_subtype msubtype,
950 enum bfd_architecture *type,
951 unsigned long *subtype)
952 {
953 *subtype = bfd_arch_unknown;
954
955 switch (mtype)
956 {
957 case BFD_MACH_O_CPU_TYPE_VAX:
958 *type = bfd_arch_vax;
959 break;
960 case BFD_MACH_O_CPU_TYPE_MC680x0:
961 *type = bfd_arch_m68k;
962 break;
963 case BFD_MACH_O_CPU_TYPE_I386:
964 *type = bfd_arch_i386;
965 *subtype = bfd_mach_i386_i386;
966 break;
967 case BFD_MACH_O_CPU_TYPE_X86_64:
968 *type = bfd_arch_i386;
969 *subtype = bfd_mach_x86_64;
970 break;
971 case BFD_MACH_O_CPU_TYPE_MIPS:
972 *type = bfd_arch_mips;
973 break;
974 case BFD_MACH_O_CPU_TYPE_MC98000:
975 *type = bfd_arch_m98k;
976 break;
977 case BFD_MACH_O_CPU_TYPE_HPPA:
978 *type = bfd_arch_hppa;
979 break;
980 case BFD_MACH_O_CPU_TYPE_ARM:
981 *type = bfd_arch_arm;
982 switch (msubtype)
983 {
984 case BFD_MACH_O_CPU_SUBTYPE_ARM_V4T:
985 *subtype = bfd_mach_arm_4T;
986 break;
987 case BFD_MACH_O_CPU_SUBTYPE_ARM_V6:
988 *subtype = bfd_mach_arm_4T; /* Best fit ? */
989 break;
990 case BFD_MACH_O_CPU_SUBTYPE_ARM_V5TEJ:
991 *subtype = bfd_mach_arm_5TE;
992 break;
993 case BFD_MACH_O_CPU_SUBTYPE_ARM_XSCALE:
994 *subtype = bfd_mach_arm_XScale;
995 break;
996 case BFD_MACH_O_CPU_SUBTYPE_ARM_V7:
997 *subtype = bfd_mach_arm_5TE; /* Best fit ? */
998 break;
999 case BFD_MACH_O_CPU_SUBTYPE_ARM_ALL:
1000 default:
1001 break;
1002 }
1003 break;
1004 case BFD_MACH_O_CPU_TYPE_MC88000:
1005 *type = bfd_arch_m88k;
1006 break;
1007 case BFD_MACH_O_CPU_TYPE_SPARC:
1008 *type = bfd_arch_sparc;
1009 *subtype = bfd_mach_sparc;
1010 break;
1011 case BFD_MACH_O_CPU_TYPE_I860:
1012 *type = bfd_arch_i860;
1013 break;
1014 case BFD_MACH_O_CPU_TYPE_ALPHA:
1015 *type = bfd_arch_alpha;
1016 break;
1017 case BFD_MACH_O_CPU_TYPE_POWERPC:
1018 *type = bfd_arch_powerpc;
1019 *subtype = bfd_mach_ppc;
1020 break;
1021 case BFD_MACH_O_CPU_TYPE_POWERPC_64:
1022 *type = bfd_arch_powerpc;
1023 *subtype = bfd_mach_ppc64;
1024 break;
1025 case BFD_MACH_O_CPU_TYPE_ARM64:
1026 *type = bfd_arch_aarch64;
1027 *subtype = bfd_mach_aarch64;
1028 break;
1029 default:
1030 *type = bfd_arch_unknown;
1031 break;
1032 }
1033 }
1034
1035 /* Write n NUL bytes to ABFD so that LEN + n is a multiple of 4. Return the
1036 number of bytes written or -1 in case of error. */
1037
1038 static int
1039 bfd_mach_o_pad4 (bfd *abfd, unsigned int len)
1040 {
1041 if (len % 4 != 0)
1042 {
1043 char pad[4] = {0,0,0,0};
1044 unsigned int padlen = 4 - (len % 4);
1045
1046 if (bfd_bwrite (pad, padlen, abfd) != padlen)
1047 return -1;
1048
1049 return padlen;
1050 }
1051 else
1052 return 0;
1053 }
1054
1055 /* Likewise, but for a command. */
1056
1057 static int
1058 bfd_mach_o_pad_command (bfd *abfd, unsigned int len)
1059 {
1060 unsigned int align = bfd_mach_o_wide_p (abfd) ? 8 : 4;
1061
1062 if (len % align != 0)
1063 {
1064 char pad[8] = {0};
1065 unsigned int padlen = align - (len % align);
1066
1067 if (bfd_bwrite (pad, padlen, abfd) != padlen)
1068 return -1;
1069
1070 return padlen;
1071 }
1072 else
1073 return 0;
1074 }
1075
1076 static bfd_boolean
1077 bfd_mach_o_write_header (bfd *abfd, bfd_mach_o_header *header)
1078 {
1079 struct mach_o_header_external raw;
1080 unsigned int size;
1081
1082 size = mach_o_wide_p (header) ?
1083 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
1084
1085 bfd_h_put_32 (abfd, header->magic, raw.magic);
1086 bfd_h_put_32 (abfd, header->cputype, raw.cputype);
1087 bfd_h_put_32 (abfd, header->cpusubtype, raw.cpusubtype);
1088 bfd_h_put_32 (abfd, header->filetype, raw.filetype);
1089 bfd_h_put_32 (abfd, header->ncmds, raw.ncmds);
1090 bfd_h_put_32 (abfd, header->sizeofcmds, raw.sizeofcmds);
1091 bfd_h_put_32 (abfd, header->flags, raw.flags);
1092
1093 if (mach_o_wide_p (header))
1094 bfd_h_put_32 (abfd, header->reserved, raw.reserved);
1095
1096 if (bfd_seek (abfd, 0, SEEK_SET) != 0
1097 || bfd_bwrite (&raw, size, abfd) != size)
1098 return FALSE;
1099
1100 return TRUE;
1101 }
1102
1103 static bfd_boolean
1104 bfd_mach_o_write_thread (bfd *abfd, bfd_mach_o_load_command *command)
1105 {
1106 bfd_mach_o_thread_command *cmd = &command->command.thread;
1107 unsigned int i;
1108 struct mach_o_thread_command_external raw;
1109 unsigned int offset;
1110
1111 BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD)
1112 || (command->type == BFD_MACH_O_LC_UNIXTHREAD));
1113
1114 offset = BFD_MACH_O_LC_SIZE;
1115 for (i = 0; i < cmd->nflavours; i++)
1116 {
1117 BFD_ASSERT ((cmd->flavours[i].size % 4) == 0);
1118 BFD_ASSERT (cmd->flavours[i].offset ==
1119 (command->offset + offset + BFD_MACH_O_LC_SIZE));
1120
1121 bfd_h_put_32 (abfd, cmd->flavours[i].flavour, raw.flavour);
1122 bfd_h_put_32 (abfd, (cmd->flavours[i].size / 4), raw.count);
1123
1124 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
1125 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1126 return FALSE;
1127
1128 offset += cmd->flavours[i].size + sizeof (raw);
1129 }
1130
1131 return TRUE;
1132 }
1133
1134 static bfd_boolean
1135 bfd_mach_o_write_dylinker (bfd *abfd, bfd_mach_o_load_command *command)
1136 {
1137 bfd_mach_o_dylinker_command *cmd = &command->command.dylinker;
1138 struct mach_o_str_command_external raw;
1139 unsigned int namelen;
1140
1141 bfd_h_put_32 (abfd, cmd->name_offset, raw.str);
1142
1143 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1144 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1145 return FALSE;
1146
1147 namelen = strlen (cmd->name_str) + 1;
1148 if (bfd_bwrite (cmd->name_str, namelen, abfd) != namelen)
1149 return FALSE;
1150
1151 if (bfd_mach_o_pad_command (abfd, namelen) < 0)
1152 return FALSE;
1153
1154 return TRUE;
1155 }
1156
1157 static bfd_boolean
1158 bfd_mach_o_write_dylib (bfd *abfd, bfd_mach_o_load_command *command)
1159 {
1160 bfd_mach_o_dylib_command *cmd = &command->command.dylib;
1161 struct mach_o_dylib_command_external raw;
1162 unsigned int namelen;
1163
1164 bfd_h_put_32 (abfd, cmd->name_offset, raw.name);
1165 bfd_h_put_32 (abfd, cmd->timestamp, raw.timestamp);
1166 bfd_h_put_32 (abfd, cmd->current_version, raw.current_version);
1167 bfd_h_put_32 (abfd, cmd->compatibility_version, raw.compatibility_version);
1168
1169 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1170 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1171 return FALSE;
1172
1173 namelen = strlen (cmd->name_str) + 1;
1174 if (bfd_bwrite (cmd->name_str, namelen, abfd) != namelen)
1175 return FALSE;
1176
1177 if (bfd_mach_o_pad_command (abfd, namelen) < 0)
1178 return FALSE;
1179
1180 return TRUE;
1181 }
1182
1183 static bfd_boolean
1184 bfd_mach_o_write_main (bfd *abfd, bfd_mach_o_load_command *command)
1185 {
1186 bfd_mach_o_main_command *cmd = &command->command.main;
1187 struct mach_o_entry_point_command_external raw;
1188
1189 bfd_h_put_64 (abfd, cmd->entryoff, raw.entryoff);
1190 bfd_h_put_64 (abfd, cmd->stacksize, raw.stacksize);
1191
1192 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1193 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1194 return FALSE;
1195
1196 return TRUE;
1197 }
1198
1199 static bfd_boolean
1200 bfd_mach_o_write_dyld_info (bfd *abfd, bfd_mach_o_load_command *command)
1201 {
1202 bfd_mach_o_dyld_info_command *cmd = &command->command.dyld_info;
1203 struct mach_o_dyld_info_command_external raw;
1204
1205 bfd_h_put_32 (abfd, cmd->rebase_off, raw.rebase_off);
1206 bfd_h_put_32 (abfd, cmd->rebase_size, raw.rebase_size);
1207 bfd_h_put_32 (abfd, cmd->bind_off, raw.bind_off);
1208 bfd_h_put_32 (abfd, cmd->bind_size, raw.bind_size);
1209 bfd_h_put_32 (abfd, cmd->weak_bind_off, raw.weak_bind_off);
1210 bfd_h_put_32 (abfd, cmd->weak_bind_size, raw.weak_bind_size);
1211 bfd_h_put_32 (abfd, cmd->lazy_bind_off, raw.lazy_bind_off);
1212 bfd_h_put_32 (abfd, cmd->lazy_bind_size, raw.lazy_bind_size);
1213 bfd_h_put_32 (abfd, cmd->export_off, raw.export_off);
1214 bfd_h_put_32 (abfd, cmd->export_size, raw.export_size);
1215
1216 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1217 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1218 return FALSE;
1219
1220 if (cmd->rebase_size != 0)
1221 if (bfd_seek (abfd, cmd->rebase_off, SEEK_SET) != 0
1222 || (bfd_bwrite (cmd->rebase_content, cmd->rebase_size, abfd) !=
1223 cmd->rebase_size))
1224 return FALSE;
1225
1226 if (cmd->bind_size != 0)
1227 if (bfd_seek (abfd, cmd->bind_off, SEEK_SET) != 0
1228 || (bfd_bwrite (cmd->bind_content, cmd->bind_size, abfd) !=
1229 cmd->bind_size))
1230 return FALSE;
1231
1232 if (cmd->weak_bind_size != 0)
1233 if (bfd_seek (abfd, cmd->weak_bind_off, SEEK_SET) != 0
1234 || (bfd_bwrite (cmd->weak_bind_content, cmd->weak_bind_size, abfd) !=
1235 cmd->weak_bind_size))
1236 return FALSE;
1237
1238 if (cmd->lazy_bind_size != 0)
1239 if (bfd_seek (abfd, cmd->lazy_bind_off, SEEK_SET) != 0
1240 || (bfd_bwrite (cmd->lazy_bind_content, cmd->lazy_bind_size, abfd) !=
1241 cmd->lazy_bind_size))
1242 return FALSE;
1243
1244 if (cmd->export_size != 0)
1245 if (bfd_seek (abfd, cmd->export_off, SEEK_SET) != 0
1246 || (bfd_bwrite (cmd->export_content, cmd->export_size, abfd) !=
1247 cmd->export_size))
1248 return FALSE;
1249
1250 return TRUE;
1251 }
1252
1253 long
1254 bfd_mach_o_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
1255 asection *asect)
1256 {
1257 return (asect->reloc_count + 1) * sizeof (arelent *);
1258 }
1259
1260 /* In addition to the need to byte-swap the symbol number, the bit positions
1261 of the fields in the relocation information vary per target endian-ness. */
1262
1263 static void
1264 bfd_mach_o_swap_in_non_scattered_reloc (bfd *abfd, bfd_mach_o_reloc_info *rel,
1265 unsigned char *fields)
1266 {
1267 unsigned char info = fields[3];
1268
1269 if (bfd_big_endian (abfd))
1270 {
1271 rel->r_value = (fields[0] << 16) | (fields[1] << 8) | fields[2];
1272 rel->r_type = (info >> BFD_MACH_O_BE_TYPE_SHIFT) & BFD_MACH_O_TYPE_MASK;
1273 rel->r_pcrel = (info & BFD_MACH_O_BE_PCREL) ? 1 : 0;
1274 rel->r_length = (info >> BFD_MACH_O_BE_LENGTH_SHIFT)
1275 & BFD_MACH_O_LENGTH_MASK;
1276 rel->r_extern = (info & BFD_MACH_O_BE_EXTERN) ? 1 : 0;
1277 }
1278 else
1279 {
1280 rel->r_value = (fields[2] << 16) | (fields[1] << 8) | fields[0];
1281 rel->r_type = (info >> BFD_MACH_O_LE_TYPE_SHIFT) & BFD_MACH_O_TYPE_MASK;
1282 rel->r_pcrel = (info & BFD_MACH_O_LE_PCREL) ? 1 : 0;
1283 rel->r_length = (info >> BFD_MACH_O_LE_LENGTH_SHIFT)
1284 & BFD_MACH_O_LENGTH_MASK;
1285 rel->r_extern = (info & BFD_MACH_O_LE_EXTERN) ? 1 : 0;
1286 }
1287 }
1288
1289 static int
1290 bfd_mach_o_canonicalize_one_reloc (bfd *abfd,
1291 struct mach_o_reloc_info_external *raw,
1292 arelent *res, asymbol **syms)
1293 {
1294 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1295 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1296 bfd_mach_o_reloc_info reloc;
1297 bfd_vma addr;
1298 asymbol **sym;
1299
1300 addr = bfd_get_32 (abfd, raw->r_address);
1301 res->sym_ptr_ptr = NULL;
1302 res->addend = 0;
1303
1304 if (addr & BFD_MACH_O_SR_SCATTERED)
1305 {
1306 unsigned int j;
1307 bfd_vma symnum = bfd_get_32 (abfd, raw->r_symbolnum);
1308
1309 /* Scattered relocation, can't be extern. */
1310 reloc.r_scattered = 1;
1311 reloc.r_extern = 0;
1312
1313 /* Extract section and offset from r_value (symnum). */
1314 reloc.r_value = symnum;
1315 /* FIXME: This breaks when a symbol in a reloc exactly follows the
1316 end of the data for the section (e.g. in a calculation of section
1317 data length). At present, the symbol will end up associated with
1318 the following section or, if it falls within alignment padding, as
1319 null - which will assert later. */
1320 for (j = 0; j < mdata->nsects; j++)
1321 {
1322 bfd_mach_o_section *sect = mdata->sections[j];
1323 if (symnum >= sect->addr && symnum < sect->addr + sect->size)
1324 {
1325 res->sym_ptr_ptr = sect->bfdsection->symbol_ptr_ptr;
1326 res->addend = symnum - sect->addr;
1327 break;
1328 }
1329 }
1330
1331 /* Extract the info and address fields from r_address. */
1332 reloc.r_type = BFD_MACH_O_GET_SR_TYPE (addr);
1333 reloc.r_length = BFD_MACH_O_GET_SR_LENGTH (addr);
1334 reloc.r_pcrel = addr & BFD_MACH_O_SR_PCREL;
1335 reloc.r_address = BFD_MACH_O_GET_SR_TYPE (addr);
1336 res->address = BFD_MACH_O_GET_SR_ADDRESS (addr);
1337 }
1338 else
1339 {
1340 unsigned int num;
1341
1342 /* Non-scattered relocation. */
1343 reloc.r_scattered = 0;
1344
1345 /* The value and info fields have to be extracted dependent on target
1346 endian-ness. */
1347 bfd_mach_o_swap_in_non_scattered_reloc (abfd, &reloc, raw->r_symbolnum);
1348 num = reloc.r_value;
1349
1350 if (reloc.r_extern)
1351 {
1352 /* PR 17512: file: 8396-1185-0.004. */
1353 if (num >= bfd_get_symcount (abfd))
1354 sym = bfd_und_section_ptr->symbol_ptr_ptr;
1355 else
1356 /* An external symbol number. */
1357 sym = syms + num;
1358 }
1359 else if (num == 0x00ffffff || num == 0)
1360 {
1361 /* The 'symnum' in a non-scattered PAIR is 0x00ffffff. But as this
1362 is generic code, we don't know wether this is really a PAIR.
1363 This value is almost certainly not a valid section number, hence
1364 this specific case to avoid an assertion failure.
1365 Target specific swap_reloc_in routine should adjust that. */
1366 sym = bfd_abs_section_ptr->symbol_ptr_ptr;
1367 }
1368 else
1369 {
1370 /* PR 17512: file: 006-2964-0.004. */
1371 if (num >= mdata->nsects)
1372 return -1;
1373
1374 /* A section number. */
1375 sym = mdata->sections[num - 1]->bfdsection->symbol_ptr_ptr;
1376 /* For a symbol defined in section S, the addend (stored in the
1377 binary) contains the address of the section. To comply with
1378 bfd convention, subtract the section address.
1379 Use the address from the header, so that the user can modify
1380 the vma of the section. */
1381 res->addend = -mdata->sections[num - 1]->addr;
1382 }
1383 /* Note: Pairs for PPC LO/HI/HA are not scattered, but contain the offset
1384 in the lower 16bits of the address value. So we have to find the
1385 'symbol' from the preceding reloc. We do this even though the
1386 section symbol is probably not needed here, because NULL symbol
1387 values cause an assert in generic BFD code. This must be done in
1388 the PPC swap_reloc_in routine. */
1389 res->sym_ptr_ptr = sym;
1390
1391 /* The 'address' is just r_address.
1392 ??? maybe this should be masked with 0xffffff for safety. */
1393 res->address = addr;
1394 reloc.r_address = addr;
1395 }
1396
1397 /* We have set up a reloc with all the information present, so the swapper
1398 can modify address, value and addend fields, if necessary, to convey
1399 information in the generic BFD reloc that is mach-o specific. */
1400
1401 if (!(*bed->_bfd_mach_o_swap_reloc_in)(res, &reloc))
1402 return -1;
1403 return 0;
1404 }
1405
1406 static int
1407 bfd_mach_o_canonicalize_relocs (bfd *abfd, unsigned long filepos,
1408 unsigned long count,
1409 arelent *res, asymbol **syms)
1410 {
1411 unsigned long i;
1412 struct mach_o_reloc_info_external *native_relocs;
1413 bfd_size_type native_size;
1414
1415 /* Allocate and read relocs. */
1416 native_size = count * BFD_MACH_O_RELENT_SIZE;
1417 native_relocs =
1418 (struct mach_o_reloc_info_external *) bfd_malloc (native_size);
1419 if (native_relocs == NULL)
1420 return -1;
1421
1422 if (bfd_seek (abfd, filepos, SEEK_SET) != 0
1423 || bfd_bread (native_relocs, native_size, abfd) != native_size)
1424 goto err;
1425
1426 for (i = 0; i < count; i++)
1427 {
1428 if (bfd_mach_o_canonicalize_one_reloc (abfd, &native_relocs[i],
1429 &res[i], syms) < 0)
1430 goto err;
1431 }
1432 free (native_relocs);
1433 return i;
1434 err:
1435 free (native_relocs);
1436 return -1;
1437 }
1438
1439 long
1440 bfd_mach_o_canonicalize_reloc (bfd *abfd, asection *asect,
1441 arelent **rels, asymbol **syms)
1442 {
1443 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1444 unsigned long i;
1445 arelent *res;
1446
1447 if (asect->reloc_count == 0)
1448 return 0;
1449
1450 /* No need to go further if we don't know how to read relocs. */
1451 if (bed->_bfd_mach_o_swap_reloc_in == NULL)
1452 return 0;
1453
1454 if (asect->relocation == NULL)
1455 {
1456 res = bfd_malloc (asect->reloc_count * sizeof (arelent));
1457 if (res == NULL)
1458 return -1;
1459
1460 if (bfd_mach_o_canonicalize_relocs (abfd, asect->rel_filepos,
1461 asect->reloc_count, res, syms) < 0)
1462 {
1463 free (res);
1464 return -1;
1465 }
1466 asect->relocation = res;
1467 }
1468
1469 res = asect->relocation;
1470 for (i = 0; i < asect->reloc_count; i++)
1471 rels[i] = &res[i];
1472 rels[i] = NULL;
1473
1474 return i;
1475 }
1476
1477 long
1478 bfd_mach_o_get_dynamic_reloc_upper_bound (bfd *abfd)
1479 {
1480 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1481
1482 if (mdata->dysymtab == NULL)
1483 return 1;
1484 return (mdata->dysymtab->nextrel + mdata->dysymtab->nlocrel + 1)
1485 * sizeof (arelent *);
1486 }
1487
1488 long
1489 bfd_mach_o_canonicalize_dynamic_reloc (bfd *abfd, arelent **rels,
1490 struct bfd_symbol **syms)
1491 {
1492 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1493 bfd_mach_o_dysymtab_command *dysymtab = mdata->dysymtab;
1494 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1495 unsigned long i;
1496 arelent *res;
1497
1498 if (dysymtab == NULL)
1499 return 0;
1500 if (dysymtab->nextrel == 0 && dysymtab->nlocrel == 0)
1501 return 0;
1502
1503 /* No need to go further if we don't know how to read relocs. */
1504 if (bed->_bfd_mach_o_swap_reloc_in == NULL)
1505 return 0;
1506
1507 if (mdata->dyn_reloc_cache == NULL)
1508 {
1509 res = bfd_malloc ((dysymtab->nextrel + dysymtab->nlocrel)
1510 * sizeof (arelent));
1511 if (res == NULL)
1512 return -1;
1513
1514 if (bfd_mach_o_canonicalize_relocs (abfd, dysymtab->extreloff,
1515 dysymtab->nextrel, res, syms) < 0)
1516 {
1517 free (res);
1518 return -1;
1519 }
1520
1521 if (bfd_mach_o_canonicalize_relocs (abfd, dysymtab->locreloff,
1522 dysymtab->nlocrel,
1523 res + dysymtab->nextrel, syms) < 0)
1524 {
1525 free (res);
1526 return -1;
1527 }
1528
1529 mdata->dyn_reloc_cache = res;
1530 }
1531
1532 res = mdata->dyn_reloc_cache;
1533 for (i = 0; i < dysymtab->nextrel + dysymtab->nlocrel; i++)
1534 rels[i] = &res[i];
1535 rels[i] = NULL;
1536 return i;
1537 }
1538
1539 /* In addition to the need to byte-swap the symbol number, the bit positions
1540 of the fields in the relocation information vary per target endian-ness. */
1541
1542 static void
1543 bfd_mach_o_swap_out_non_scattered_reloc (bfd *abfd, unsigned char *fields,
1544 bfd_mach_o_reloc_info *rel)
1545 {
1546 unsigned char info = 0;
1547
1548 BFD_ASSERT (rel->r_type <= 15);
1549 BFD_ASSERT (rel->r_length <= 3);
1550
1551 if (bfd_big_endian (abfd))
1552 {
1553 fields[0] = (rel->r_value >> 16) & 0xff;
1554 fields[1] = (rel->r_value >> 8) & 0xff;
1555 fields[2] = rel->r_value & 0xff;
1556 info |= rel->r_type << BFD_MACH_O_BE_TYPE_SHIFT;
1557 info |= rel->r_pcrel ? BFD_MACH_O_BE_PCREL : 0;
1558 info |= rel->r_length << BFD_MACH_O_BE_LENGTH_SHIFT;
1559 info |= rel->r_extern ? BFD_MACH_O_BE_EXTERN : 0;
1560 }
1561 else
1562 {
1563 fields[2] = (rel->r_value >> 16) & 0xff;
1564 fields[1] = (rel->r_value >> 8) & 0xff;
1565 fields[0] = rel->r_value & 0xff;
1566 info |= rel->r_type << BFD_MACH_O_LE_TYPE_SHIFT;
1567 info |= rel->r_pcrel ? BFD_MACH_O_LE_PCREL : 0;
1568 info |= rel->r_length << BFD_MACH_O_LE_LENGTH_SHIFT;
1569 info |= rel->r_extern ? BFD_MACH_O_LE_EXTERN : 0;
1570 }
1571 fields[3] = info;
1572 }
1573
1574 static bfd_boolean
1575 bfd_mach_o_write_relocs (bfd *abfd, bfd_mach_o_section *section)
1576 {
1577 unsigned int i;
1578 arelent **entries;
1579 asection *sec;
1580 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1581
1582 sec = section->bfdsection;
1583 if (sec->reloc_count == 0)
1584 return TRUE;
1585
1586 if (bed->_bfd_mach_o_swap_reloc_out == NULL)
1587 return TRUE;
1588
1589 if (bfd_seek (abfd, section->reloff, SEEK_SET) != 0)
1590 return FALSE;
1591
1592 /* Convert and write. */
1593 entries = section->bfdsection->orelocation;
1594 for (i = 0; i < section->nreloc; i++)
1595 {
1596 arelent *rel = entries[i];
1597 struct mach_o_reloc_info_external raw;
1598 bfd_mach_o_reloc_info info, *pinfo = &info;
1599
1600 /* Convert relocation to an intermediate representation. */
1601 if (!(*bed->_bfd_mach_o_swap_reloc_out) (rel, pinfo))
1602 return FALSE;
1603
1604 /* Lower the relocation info. */
1605 if (pinfo->r_scattered)
1606 {
1607 unsigned long v;
1608
1609 v = BFD_MACH_O_SR_SCATTERED
1610 | (pinfo->r_pcrel ? BFD_MACH_O_SR_PCREL : 0)
1611 | BFD_MACH_O_SET_SR_LENGTH (pinfo->r_length)
1612 | BFD_MACH_O_SET_SR_TYPE (pinfo->r_type)
1613 | BFD_MACH_O_SET_SR_ADDRESS (pinfo->r_address);
1614 /* Note: scattered relocs have field in reverse order... */
1615 bfd_put_32 (abfd, v, raw.r_address);
1616 bfd_put_32 (abfd, pinfo->r_value, raw.r_symbolnum);
1617 }
1618 else
1619 {
1620 bfd_put_32 (abfd, pinfo->r_address, raw.r_address);
1621 bfd_mach_o_swap_out_non_scattered_reloc (abfd, raw.r_symbolnum,
1622 pinfo);
1623 }
1624
1625 if (bfd_bwrite (&raw, BFD_MACH_O_RELENT_SIZE, abfd)
1626 != BFD_MACH_O_RELENT_SIZE)
1627 return FALSE;
1628 }
1629 return TRUE;
1630 }
1631
1632 static bfd_boolean
1633 bfd_mach_o_write_section_32 (bfd *abfd, bfd_mach_o_section *section)
1634 {
1635 struct mach_o_section_32_external raw;
1636
1637 memcpy (raw.sectname, section->sectname, 16);
1638 memcpy (raw.segname, section->segname, 16);
1639 bfd_h_put_32 (abfd, section->addr, raw.addr);
1640 bfd_h_put_32 (abfd, section->size, raw.size);
1641 bfd_h_put_32 (abfd, section->offset, raw.offset);
1642 bfd_h_put_32 (abfd, section->align, raw.align);
1643 bfd_h_put_32 (abfd, section->reloff, raw.reloff);
1644 bfd_h_put_32 (abfd, section->nreloc, raw.nreloc);
1645 bfd_h_put_32 (abfd, section->flags, raw.flags);
1646 bfd_h_put_32 (abfd, section->reserved1, raw.reserved1);
1647 bfd_h_put_32 (abfd, section->reserved2, raw.reserved2);
1648
1649 if (bfd_bwrite (&raw, BFD_MACH_O_SECTION_SIZE, abfd)
1650 != BFD_MACH_O_SECTION_SIZE)
1651 return FALSE;
1652
1653 return TRUE;
1654 }
1655
1656 static bfd_boolean
1657 bfd_mach_o_write_section_64 (bfd *abfd, bfd_mach_o_section *section)
1658 {
1659 struct mach_o_section_64_external raw;
1660
1661 memcpy (raw.sectname, section->sectname, 16);
1662 memcpy (raw.segname, section->segname, 16);
1663 bfd_h_put_64 (abfd, section->addr, raw.addr);
1664 bfd_h_put_64 (abfd, section->size, raw.size);
1665 bfd_h_put_32 (abfd, section->offset, raw.offset);
1666 bfd_h_put_32 (abfd, section->align, raw.align);
1667 bfd_h_put_32 (abfd, section->reloff, raw.reloff);
1668 bfd_h_put_32 (abfd, section->nreloc, raw.nreloc);
1669 bfd_h_put_32 (abfd, section->flags, raw.flags);
1670 bfd_h_put_32 (abfd, section->reserved1, raw.reserved1);
1671 bfd_h_put_32 (abfd, section->reserved2, raw.reserved2);
1672 bfd_h_put_32 (abfd, section->reserved3, raw.reserved3);
1673
1674 if (bfd_bwrite (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd)
1675 != BFD_MACH_O_SECTION_64_SIZE)
1676 return FALSE;
1677
1678 return TRUE;
1679 }
1680
1681 static bfd_boolean
1682 bfd_mach_o_write_segment_32 (bfd *abfd, bfd_mach_o_load_command *command)
1683 {
1684 struct mach_o_segment_command_32_external raw;
1685 bfd_mach_o_segment_command *seg = &command->command.segment;
1686 bfd_mach_o_section *sec;
1687
1688 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT);
1689
1690 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1691 if (!bfd_mach_o_write_relocs (abfd, sec))
1692 return FALSE;
1693
1694 memcpy (raw.segname, seg->segname, 16);
1695 bfd_h_put_32 (abfd, seg->vmaddr, raw.vmaddr);
1696 bfd_h_put_32 (abfd, seg->vmsize, raw.vmsize);
1697 bfd_h_put_32 (abfd, seg->fileoff, raw.fileoff);
1698 bfd_h_put_32 (abfd, seg->filesize, raw.filesize);
1699 bfd_h_put_32 (abfd, seg->maxprot, raw.maxprot);
1700 bfd_h_put_32 (abfd, seg->initprot, raw.initprot);
1701 bfd_h_put_32 (abfd, seg->nsects, raw.nsects);
1702 bfd_h_put_32 (abfd, seg->flags, raw.flags);
1703
1704 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1705 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1706 return FALSE;
1707
1708 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1709 if (!bfd_mach_o_write_section_32 (abfd, sec))
1710 return FALSE;
1711
1712 return TRUE;
1713 }
1714
1715 static bfd_boolean
1716 bfd_mach_o_write_segment_64 (bfd *abfd, bfd_mach_o_load_command *command)
1717 {
1718 struct mach_o_segment_command_64_external raw;
1719 bfd_mach_o_segment_command *seg = &command->command.segment;
1720 bfd_mach_o_section *sec;
1721
1722 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64);
1723
1724 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1725 if (!bfd_mach_o_write_relocs (abfd, sec))
1726 return FALSE;
1727
1728 memcpy (raw.segname, seg->segname, 16);
1729 bfd_h_put_64 (abfd, seg->vmaddr, raw.vmaddr);
1730 bfd_h_put_64 (abfd, seg->vmsize, raw.vmsize);
1731 bfd_h_put_64 (abfd, seg->fileoff, raw.fileoff);
1732 bfd_h_put_64 (abfd, seg->filesize, raw.filesize);
1733 bfd_h_put_32 (abfd, seg->maxprot, raw.maxprot);
1734 bfd_h_put_32 (abfd, seg->initprot, raw.initprot);
1735 bfd_h_put_32 (abfd, seg->nsects, raw.nsects);
1736 bfd_h_put_32 (abfd, seg->flags, raw.flags);
1737
1738 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1739 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1740 return FALSE;
1741
1742 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1743 if (!bfd_mach_o_write_section_64 (abfd, sec))
1744 return FALSE;
1745
1746 return TRUE;
1747 }
1748
1749 static bfd_boolean
1750 bfd_mach_o_write_symtab_content (bfd *abfd, bfd_mach_o_symtab_command *sym)
1751 {
1752 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1753 unsigned long i;
1754 unsigned int wide = bfd_mach_o_wide_p (abfd);
1755 struct bfd_strtab_hash *strtab;
1756 asymbol **symbols = bfd_get_outsymbols (abfd);
1757 int padlen;
1758
1759 /* Write the symbols first. */
1760 if (bfd_seek (abfd, sym->symoff, SEEK_SET) != 0)
1761 return FALSE;
1762
1763 strtab = _bfd_stringtab_init ();
1764 if (strtab == NULL)
1765 return FALSE;
1766
1767 if (sym->nsyms > 0)
1768 /* Although we don't strictly need to do this, for compatibility with
1769 Darwin system tools, actually output an empty string for the index
1770 0 entry. */
1771 _bfd_stringtab_add (strtab, "", TRUE, FALSE);
1772
1773 for (i = 0; i < sym->nsyms; i++)
1774 {
1775 bfd_size_type str_index;
1776 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
1777
1778 if (s->symbol.name == 0 || s->symbol.name[0] == '\0')
1779 /* An index of 0 always means the empty string. */
1780 str_index = 0;
1781 else
1782 {
1783 str_index = _bfd_stringtab_add (strtab, s->symbol.name, TRUE, FALSE);
1784
1785 if (str_index == (bfd_size_type) -1)
1786 goto err;
1787 }
1788
1789 if (wide)
1790 {
1791 struct mach_o_nlist_64_external raw;
1792
1793 bfd_h_put_32 (abfd, str_index, raw.n_strx);
1794 bfd_h_put_8 (abfd, s->n_type, raw.n_type);
1795 bfd_h_put_8 (abfd, s->n_sect, raw.n_sect);
1796 bfd_h_put_16 (abfd, s->n_desc, raw.n_desc);
1797 bfd_h_put_64 (abfd, s->symbol.section->vma + s->symbol.value,
1798 raw.n_value);
1799
1800 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1801 goto err;
1802 }
1803 else
1804 {
1805 struct mach_o_nlist_external raw;
1806
1807 bfd_h_put_32 (abfd, str_index, raw.n_strx);
1808 bfd_h_put_8 (abfd, s->n_type, raw.n_type);
1809 bfd_h_put_8 (abfd, s->n_sect, raw.n_sect);
1810 bfd_h_put_16 (abfd, s->n_desc, raw.n_desc);
1811 bfd_h_put_32 (abfd, s->symbol.section->vma + s->symbol.value,
1812 raw.n_value);
1813
1814 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1815 goto err;
1816 }
1817 }
1818 sym->strsize = _bfd_stringtab_size (strtab);
1819 sym->stroff = mdata->filelen;
1820 mdata->filelen += sym->strsize;
1821
1822 if (bfd_seek (abfd, sym->stroff, SEEK_SET) != 0)
1823 return FALSE;
1824
1825 if (_bfd_stringtab_emit (abfd, strtab) != TRUE)
1826 goto err;
1827 _bfd_stringtab_free (strtab);
1828
1829 /* Pad string table. */
1830 padlen = bfd_mach_o_pad4 (abfd, sym->strsize);
1831 if (padlen < 0)
1832 return FALSE;
1833 mdata->filelen += padlen;
1834 sym->strsize += padlen;
1835
1836 return TRUE;
1837
1838 err:
1839 _bfd_stringtab_free (strtab);
1840 return FALSE;
1841 }
1842
1843 static bfd_boolean
1844 bfd_mach_o_write_symtab (bfd *abfd, bfd_mach_o_load_command *command)
1845 {
1846 bfd_mach_o_symtab_command *sym = &command->command.symtab;
1847 struct mach_o_symtab_command_external raw;
1848
1849 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB);
1850
1851 /* The command. */
1852 bfd_h_put_32 (abfd, sym->symoff, raw.symoff);
1853 bfd_h_put_32 (abfd, sym->nsyms, raw.nsyms);
1854 bfd_h_put_32 (abfd, sym->stroff, raw.stroff);
1855 bfd_h_put_32 (abfd, sym->strsize, raw.strsize);
1856
1857 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1858 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1859 return FALSE;
1860
1861 return TRUE;
1862 }
1863
1864 /* Count the number of indirect symbols in the image.
1865 Requires that the sections are in their final order. */
1866
1867 static unsigned int
1868 bfd_mach_o_count_indirect_symbols (bfd *abfd, bfd_mach_o_data_struct *mdata)
1869 {
1870 unsigned int i;
1871 unsigned int nisyms = 0;
1872
1873 for (i = 0; i < mdata->nsects; ++i)
1874 {
1875 bfd_mach_o_section *sec = mdata->sections[i];
1876
1877 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
1878 {
1879 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
1880 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
1881 case BFD_MACH_O_S_SYMBOL_STUBS:
1882 nisyms += bfd_mach_o_section_get_nbr_indirect (abfd, sec);
1883 break;
1884 default:
1885 break;
1886 }
1887 }
1888 return nisyms;
1889 }
1890
1891 /* Create the dysymtab. */
1892
1893 static bfd_boolean
1894 bfd_mach_o_build_dysymtab (bfd *abfd, bfd_mach_o_dysymtab_command *cmd)
1895 {
1896 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1897
1898 /* TODO:
1899 We are not going to try and fill these in yet and, moreover, we are
1900 going to bail if they are already set. */
1901 if (cmd->nmodtab != 0
1902 || cmd->ntoc != 0
1903 || cmd->nextrefsyms != 0)
1904 {
1905 (*_bfd_error_handler) (_("sorry: modtab, toc and extrefsyms are not yet"
1906 " implemented for dysymtab commands."));
1907 return FALSE;
1908 }
1909
1910 cmd->ilocalsym = 0;
1911
1912 if (bfd_get_symcount (abfd) > 0)
1913 {
1914 asymbol **symbols = bfd_get_outsymbols (abfd);
1915 unsigned long i;
1916
1917 /* Count the number of each kind of symbol. */
1918 for (i = 0; i < bfd_get_symcount (abfd); ++i)
1919 {
1920 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
1921 if (s->n_type & (BFD_MACH_O_N_EXT | BFD_MACH_O_N_PEXT))
1922 break;
1923 }
1924 cmd->nlocalsym = i;
1925 cmd->iextdefsym = i;
1926 for (; i < bfd_get_symcount (abfd); ++i)
1927 {
1928 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
1929 if ((s->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_UNDF)
1930 break;
1931 }
1932 cmd->nextdefsym = i - cmd->nlocalsym;
1933 cmd->iundefsym = cmd->nextdefsym + cmd->iextdefsym;
1934 cmd->nundefsym = bfd_get_symcount (abfd)
1935 - cmd->nlocalsym
1936 - cmd->nextdefsym;
1937 }
1938 else
1939 {
1940 cmd->nlocalsym = 0;
1941 cmd->iextdefsym = 0;
1942 cmd->nextdefsym = 0;
1943 cmd->iundefsym = 0;
1944 cmd->nundefsym = 0;
1945 }
1946
1947 cmd->nindirectsyms = bfd_mach_o_count_indirect_symbols (abfd, mdata);
1948 if (cmd->nindirectsyms > 0)
1949 {
1950 unsigned i;
1951 unsigned n;
1952
1953 mdata->filelen = FILE_ALIGN (mdata->filelen, 2);
1954 cmd->indirectsymoff = mdata->filelen;
1955 mdata->filelen += cmd->nindirectsyms * 4;
1956
1957 cmd->indirect_syms = bfd_zalloc (abfd, cmd->nindirectsyms * 4);
1958 if (cmd->indirect_syms == NULL)
1959 return FALSE;
1960
1961 n = 0;
1962 for (i = 0; i < mdata->nsects; ++i)
1963 {
1964 bfd_mach_o_section *sec = mdata->sections[i];
1965
1966 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
1967 {
1968 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
1969 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
1970 case BFD_MACH_O_S_SYMBOL_STUBS:
1971 {
1972 unsigned j, num;
1973 bfd_mach_o_asymbol **isyms = sec->indirect_syms;
1974
1975 num = bfd_mach_o_section_get_nbr_indirect (abfd, sec);
1976 if (isyms == NULL || num == 0)
1977 break;
1978 /* Record the starting index in the reserved1 field. */
1979 sec->reserved1 = n;
1980 for (j = 0; j < num; j++, n++)
1981 {
1982 if (isyms[j] == NULL)
1983 cmd->indirect_syms[n] = BFD_MACH_O_INDIRECT_SYM_LOCAL;
1984 else if (isyms[j]->symbol.section == bfd_abs_section_ptr
1985 && ! (isyms[j]->n_type & BFD_MACH_O_N_EXT))
1986 cmd->indirect_syms[n] = BFD_MACH_O_INDIRECT_SYM_LOCAL
1987 | BFD_MACH_O_INDIRECT_SYM_ABS;
1988 else
1989 cmd->indirect_syms[n] = isyms[j]->symbol.udata.i;
1990 }
1991 }
1992 break;
1993 default:
1994 break;
1995 }
1996 }
1997 }
1998
1999 return TRUE;
2000 }
2001
2002 /* Write a dysymtab command.
2003 TODO: Possibly coalesce writes of smaller objects. */
2004
2005 static bfd_boolean
2006 bfd_mach_o_write_dysymtab (bfd *abfd, bfd_mach_o_load_command *command)
2007 {
2008 bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab;
2009
2010 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB);
2011
2012 if (cmd->nmodtab != 0)
2013 {
2014 unsigned int i;
2015
2016 if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0)
2017 return FALSE;
2018
2019 for (i = 0; i < cmd->nmodtab; i++)
2020 {
2021 bfd_mach_o_dylib_module *module = &cmd->dylib_module[i];
2022 unsigned int iinit;
2023 unsigned int ninit;
2024
2025 iinit = module->iinit & 0xffff;
2026 iinit |= ((module->iterm & 0xffff) << 16);
2027
2028 ninit = module->ninit & 0xffff;
2029 ninit |= ((module->nterm & 0xffff) << 16);
2030
2031 if (bfd_mach_o_wide_p (abfd))
2032 {
2033 struct mach_o_dylib_module_64_external w;
2034
2035 bfd_h_put_32 (abfd, module->module_name_idx, &w.module_name);
2036 bfd_h_put_32 (abfd, module->iextdefsym, &w.iextdefsym);
2037 bfd_h_put_32 (abfd, module->nextdefsym, &w.nextdefsym);
2038 bfd_h_put_32 (abfd, module->irefsym, &w.irefsym);
2039 bfd_h_put_32 (abfd, module->nrefsym, &w.nrefsym);
2040 bfd_h_put_32 (abfd, module->ilocalsym, &w.ilocalsym);
2041 bfd_h_put_32 (abfd, module->nlocalsym, &w.nlocalsym);
2042 bfd_h_put_32 (abfd, module->iextrel, &w.iextrel);
2043 bfd_h_put_32 (abfd, module->nextrel, &w.nextrel);
2044 bfd_h_put_32 (abfd, iinit, &w.iinit_iterm);
2045 bfd_h_put_32 (abfd, ninit, &w.ninit_nterm);
2046 bfd_h_put_64 (abfd, module->objc_module_info_addr,
2047 &w.objc_module_info_addr);
2048 bfd_h_put_32 (abfd, module->objc_module_info_size,
2049 &w.objc_module_info_size);
2050
2051 if (bfd_bwrite ((void *) &w, sizeof (w), abfd) != sizeof (w))
2052 return FALSE;
2053 }
2054 else
2055 {
2056 struct mach_o_dylib_module_external n;
2057
2058 bfd_h_put_32 (abfd, module->module_name_idx, &n.module_name);
2059 bfd_h_put_32 (abfd, module->iextdefsym, &n.iextdefsym);
2060 bfd_h_put_32 (abfd, module->nextdefsym, &n.nextdefsym);
2061 bfd_h_put_32 (abfd, module->irefsym, &n.irefsym);
2062 bfd_h_put_32 (abfd, module->nrefsym, &n.nrefsym);
2063 bfd_h_put_32 (abfd, module->ilocalsym, &n.ilocalsym);
2064 bfd_h_put_32 (abfd, module->nlocalsym, &n.nlocalsym);
2065 bfd_h_put_32 (abfd, module->iextrel, &n.iextrel);
2066 bfd_h_put_32 (abfd, module->nextrel, &n.nextrel);
2067 bfd_h_put_32 (abfd, iinit, &n.iinit_iterm);
2068 bfd_h_put_32 (abfd, ninit, &n.ninit_nterm);
2069 bfd_h_put_32 (abfd, module->objc_module_info_addr,
2070 &n.objc_module_info_addr);
2071 bfd_h_put_32 (abfd, module->objc_module_info_size,
2072 &n.objc_module_info_size);
2073
2074 if (bfd_bwrite ((void *) &n, sizeof (n), abfd) != sizeof (n))
2075 return FALSE;
2076 }
2077 }
2078 }
2079
2080 if (cmd->ntoc != 0)
2081 {
2082 unsigned int i;
2083
2084 if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0)
2085 return FALSE;
2086
2087 for (i = 0; i < cmd->ntoc; i++)
2088 {
2089 struct mach_o_dylib_table_of_contents_external raw;
2090 bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i];
2091
2092 bfd_h_put_32 (abfd, toc->symbol_index, &raw.symbol_index);
2093 bfd_h_put_32 (abfd, toc->module_index, &raw.module_index);
2094
2095 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
2096 return FALSE;
2097 }
2098 }
2099
2100 if (cmd->nindirectsyms > 0)
2101 {
2102 unsigned int i;
2103
2104 if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0)
2105 return FALSE;
2106
2107 for (i = 0; i < cmd->nindirectsyms; ++i)
2108 {
2109 unsigned char raw[4];
2110
2111 bfd_h_put_32 (abfd, cmd->indirect_syms[i], &raw);
2112 if (bfd_bwrite (raw, sizeof (raw), abfd) != sizeof (raw))
2113 return FALSE;
2114 }
2115 }
2116
2117 if (cmd->nextrefsyms != 0)
2118 {
2119 unsigned int i;
2120
2121 if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0)
2122 return FALSE;
2123
2124 for (i = 0; i < cmd->nextrefsyms; i++)
2125 {
2126 unsigned long v;
2127 unsigned char raw[4];
2128 bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i];
2129
2130 /* Fields isym and flags are written as bit-fields, thus we need
2131 a specific processing for endianness. */
2132
2133 if (bfd_big_endian (abfd))
2134 {
2135 v = ((ref->isym & 0xffffff) << 8);
2136 v |= ref->flags & 0xff;
2137 }
2138 else
2139 {
2140 v = ref->isym & 0xffffff;
2141 v |= ((ref->flags & 0xff) << 24);
2142 }
2143
2144 bfd_h_put_32 (abfd, v, raw);
2145 if (bfd_bwrite (raw, sizeof (raw), abfd) != sizeof (raw))
2146 return FALSE;
2147 }
2148 }
2149
2150 /* The command. */
2151 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0)
2152 return FALSE;
2153 else
2154 {
2155 struct mach_o_dysymtab_command_external raw;
2156
2157 bfd_h_put_32 (abfd, cmd->ilocalsym, &raw.ilocalsym);
2158 bfd_h_put_32 (abfd, cmd->nlocalsym, &raw.nlocalsym);
2159 bfd_h_put_32 (abfd, cmd->iextdefsym, &raw.iextdefsym);
2160 bfd_h_put_32 (abfd, cmd->nextdefsym, &raw.nextdefsym);
2161 bfd_h_put_32 (abfd, cmd->iundefsym, &raw.iundefsym);
2162 bfd_h_put_32 (abfd, cmd->nundefsym, &raw.nundefsym);
2163 bfd_h_put_32 (abfd, cmd->tocoff, &raw.tocoff);
2164 bfd_h_put_32 (abfd, cmd->ntoc, &raw.ntoc);
2165 bfd_h_put_32 (abfd, cmd->modtaboff, &raw.modtaboff);
2166 bfd_h_put_32 (abfd, cmd->nmodtab, &raw.nmodtab);
2167 bfd_h_put_32 (abfd, cmd->extrefsymoff, &raw.extrefsymoff);
2168 bfd_h_put_32 (abfd, cmd->nextrefsyms, &raw.nextrefsyms);
2169 bfd_h_put_32 (abfd, cmd->indirectsymoff, &raw.indirectsymoff);
2170 bfd_h_put_32 (abfd, cmd->nindirectsyms, &raw.nindirectsyms);
2171 bfd_h_put_32 (abfd, cmd->extreloff, &raw.extreloff);
2172 bfd_h_put_32 (abfd, cmd->nextrel, &raw.nextrel);
2173 bfd_h_put_32 (abfd, cmd->locreloff, &raw.locreloff);
2174 bfd_h_put_32 (abfd, cmd->nlocrel, &raw.nlocrel);
2175
2176 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
2177 return FALSE;
2178 }
2179
2180 return TRUE;
2181 }
2182
2183 static unsigned
2184 bfd_mach_o_primary_symbol_sort_key (bfd_mach_o_asymbol *s)
2185 {
2186 unsigned mtyp = s->n_type & BFD_MACH_O_N_TYPE;
2187
2188 /* Just leave debug symbols where they are (pretend they are local, and
2189 then they will just be sorted on position). */
2190 if (s->n_type & BFD_MACH_O_N_STAB)
2191 return 0;
2192
2193 /* Local (we should never see an undefined local AFAICT). */
2194 if (! (s->n_type & (BFD_MACH_O_N_EXT | BFD_MACH_O_N_PEXT)))
2195 return 0;
2196
2197 /* Common symbols look like undefined externs. */
2198 if (mtyp == BFD_MACH_O_N_UNDF)
2199 return 2;
2200
2201 /* A defined non-local, non-debug symbol. */
2202 return 1;
2203 }
2204
2205 static int
2206 bfd_mach_o_cf_symbols (const void *a, const void *b)
2207 {
2208 bfd_mach_o_asymbol *sa = *(bfd_mach_o_asymbol **) a;
2209 bfd_mach_o_asymbol *sb = *(bfd_mach_o_asymbol **) b;
2210 unsigned int soa, sob;
2211
2212 soa = bfd_mach_o_primary_symbol_sort_key (sa);
2213 sob = bfd_mach_o_primary_symbol_sort_key (sb);
2214 if (soa < sob)
2215 return -1;
2216
2217 if (soa > sob)
2218 return 1;
2219
2220 /* If it's local or stab, just preserve the input order. */
2221 if (soa == 0)
2222 {
2223 if (sa->symbol.udata.i < sb->symbol.udata.i)
2224 return -1;
2225 if (sa->symbol.udata.i > sb->symbol.udata.i)
2226 return 1;
2227
2228 /* This is probably an error. */
2229 return 0;
2230 }
2231
2232 /* The second sort key is name. */
2233 return strcmp (sa->symbol.name, sb->symbol.name);
2234 }
2235
2236 /* Process the symbols.
2237
2238 This should be OK for single-module files - but it is not likely to work
2239 for multi-module shared libraries.
2240
2241 (a) If the application has not filled in the relevant mach-o fields, make
2242 an estimate.
2243
2244 (b) Order them, like this:
2245 ( i) local.
2246 (unsorted)
2247 ( ii) external defined
2248 (by name)
2249 (iii) external undefined/common
2250 (by name)
2251 ( iv) common
2252 (by name)
2253 */
2254
2255 static bfd_boolean
2256 bfd_mach_o_mangle_symbols (bfd *abfd)
2257 {
2258 unsigned long i;
2259 asymbol **symbols = bfd_get_outsymbols (abfd);
2260
2261 if (symbols == NULL || bfd_get_symcount (abfd) == 0)
2262 return TRUE;
2263
2264 for (i = 0; i < bfd_get_symcount (abfd); i++)
2265 {
2266 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2267
2268 /* We use this value, which is out-of-range as a symbol index, to signal
2269 that the mach-o-specific data are not filled in and need to be created
2270 from the bfd values. It is much preferable for the application to do
2271 this, since more meaningful diagnostics can be made that way. */
2272
2273 if (s->symbol.udata.i == SYM_MACHO_FIELDS_UNSET)
2274 {
2275 /* No symbol information has been set - therefore determine
2276 it from the bfd symbol flags/info. */
2277 if (s->symbol.section == bfd_abs_section_ptr)
2278 s->n_type = BFD_MACH_O_N_ABS;
2279 else if (s->symbol.section == bfd_und_section_ptr)
2280 {
2281 s->n_type = BFD_MACH_O_N_UNDF;
2282 if (s->symbol.flags & BSF_WEAK)
2283 s->n_desc |= BFD_MACH_O_N_WEAK_REF;
2284 /* mach-o automatically makes undefined symbols extern. */
2285 s->n_type |= BFD_MACH_O_N_EXT;
2286 s->symbol.flags |= BSF_GLOBAL;
2287 }
2288 else if (s->symbol.section == bfd_com_section_ptr)
2289 {
2290 s->n_type = BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT;
2291 s->symbol.flags |= BSF_GLOBAL;
2292 }
2293 else
2294 s->n_type = BFD_MACH_O_N_SECT;
2295
2296 if (s->symbol.flags & BSF_GLOBAL)
2297 s->n_type |= BFD_MACH_O_N_EXT;
2298 }
2299
2300 /* Put the section index in, where required. */
2301 if ((s->symbol.section != bfd_abs_section_ptr
2302 && s->symbol.section != bfd_und_section_ptr
2303 && s->symbol.section != bfd_com_section_ptr)
2304 || ((s->n_type & BFD_MACH_O_N_STAB) != 0
2305 && s->symbol.name == NULL))
2306 s->n_sect = s->symbol.section->output_section->target_index;
2307
2308 /* Number to preserve order for local and debug syms. */
2309 s->symbol.udata.i = i;
2310 }
2311
2312 /* Sort the symbols. */
2313 qsort ((void *) symbols, (size_t) bfd_get_symcount (abfd),
2314 sizeof (asymbol *), bfd_mach_o_cf_symbols);
2315
2316 for (i = 0; i < bfd_get_symcount (abfd); ++i)
2317 {
2318 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2319 s->symbol.udata.i = i; /* renumber. */
2320 }
2321
2322 return TRUE;
2323 }
2324
2325 /* We build a flat table of sections, which can be re-ordered if necessary.
2326 Fill in the section number and other mach-o-specific data. */
2327
2328 static bfd_boolean
2329 bfd_mach_o_mangle_sections (bfd *abfd, bfd_mach_o_data_struct *mdata)
2330 {
2331 asection *sec;
2332 unsigned target_index;
2333 unsigned nsect;
2334
2335 nsect = bfd_count_sections (abfd);
2336
2337 /* Don't do it if it's already set - assume the application knows what it's
2338 doing. */
2339 if (mdata->nsects == nsect
2340 && (mdata->nsects == 0 || mdata->sections != NULL))
2341 return TRUE;
2342
2343 /* We need to check that this can be done... */
2344 if (nsect > 255)
2345 {
2346 (*_bfd_error_handler) (_("mach-o: there are too many sections (%u)"
2347 " maximum is 255,\n"), nsect);
2348 return FALSE;
2349 }
2350
2351 mdata->nsects = nsect;
2352 mdata->sections = bfd_alloc (abfd,
2353 mdata->nsects * sizeof (bfd_mach_o_section *));
2354 if (mdata->sections == NULL)
2355 return FALSE;
2356
2357 /* Create Mach-O sections.
2358 Section type, attribute and align should have been set when the
2359 section was created - either read in or specified. */
2360 target_index = 0;
2361 for (sec = abfd->sections; sec; sec = sec->next)
2362 {
2363 unsigned bfd_align = bfd_get_section_alignment (abfd, sec);
2364 bfd_mach_o_section *msect = bfd_mach_o_get_mach_o_section (sec);
2365
2366 mdata->sections[target_index] = msect;
2367
2368 msect->addr = bfd_get_section_vma (abfd, sec);
2369 msect->size = bfd_get_section_size (sec);
2370
2371 /* Use the largest alignment set, in case it was bumped after the
2372 section was created. */
2373 msect->align = msect->align > bfd_align ? msect->align : bfd_align;
2374
2375 msect->offset = 0;
2376 sec->target_index = ++target_index;
2377 }
2378
2379 return TRUE;
2380 }
2381
2382 bfd_boolean
2383 bfd_mach_o_write_contents (bfd *abfd)
2384 {
2385 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2386 bfd_mach_o_load_command *cmd;
2387 bfd_mach_o_symtab_command *symtab = NULL;
2388 bfd_mach_o_dysymtab_command *dysymtab = NULL;
2389 bfd_mach_o_segment_command *linkedit = NULL;
2390
2391 /* Make the commands, if not already present. */
2392 if (!abfd->output_has_begun && !bfd_mach_o_build_commands (abfd))
2393 return FALSE;
2394 abfd->output_has_begun = TRUE;
2395
2396 /* Write the header. */
2397 if (!bfd_mach_o_write_header (abfd, &mdata->header))
2398 return FALSE;
2399
2400 /* First pass: allocate the linkedit segment. */
2401 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
2402 switch (cmd->type)
2403 {
2404 case BFD_MACH_O_LC_SEGMENT_64:
2405 case BFD_MACH_O_LC_SEGMENT:
2406 if (strcmp (cmd->command.segment.segname, "__LINKEDIT") == 0)
2407 linkedit = &cmd->command.segment;
2408 break;
2409 case BFD_MACH_O_LC_SYMTAB:
2410 symtab = &cmd->command.symtab;
2411 break;
2412 case BFD_MACH_O_LC_DYSYMTAB:
2413 dysymtab = &cmd->command.dysymtab;
2414 break;
2415 case BFD_MACH_O_LC_DYLD_INFO:
2416 {
2417 bfd_mach_o_dyld_info_command *di = &cmd->command.dyld_info;
2418
2419 if (di->rebase_size != 0)
2420 {
2421 di->rebase_off = mdata->filelen;
2422 mdata->filelen += di->rebase_size;
2423 }
2424 if (di->bind_size != 0)
2425 {
2426 di->bind_off = mdata->filelen;
2427 mdata->filelen += di->bind_size;
2428 }
2429 if (di->weak_bind_size != 0)
2430 {
2431 di->weak_bind_off = mdata->filelen;
2432 mdata->filelen += di->weak_bind_size;
2433 }
2434 if (di->lazy_bind_size != 0)
2435 {
2436 di->lazy_bind_off = mdata->filelen;
2437 mdata->filelen += di->lazy_bind_size;
2438 }
2439 if (di->export_size != 0)
2440 {
2441 di->export_off = mdata->filelen;
2442 mdata->filelen += di->export_size;
2443 }
2444 }
2445 break;
2446 case BFD_MACH_O_LC_LOAD_DYLIB:
2447 case BFD_MACH_O_LC_LOAD_DYLINKER:
2448 case BFD_MACH_O_LC_MAIN:
2449 /* Nothing to do. */
2450 break;
2451 default:
2452 (*_bfd_error_handler)
2453 (_("unable to allocate data for load command 0x%lx"),
2454 (unsigned long) cmd->type);
2455 break;
2456 }
2457
2458 /* Specially handle symtab and dysymtab. */
2459
2460 /* Pre-allocate the symbol table (but not the string table). The reason
2461 is that the dysymtab is after the symbol table but before the string
2462 table (required by the native strip tool). */
2463 if (symtab != NULL)
2464 {
2465 unsigned int symlen;
2466 unsigned int wide = bfd_mach_o_wide_p (abfd);
2467
2468 symlen = wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE;
2469
2470 /* Align for symbols. */
2471 mdata->filelen = FILE_ALIGN (mdata->filelen, wide ? 3 : 2);
2472 symtab->symoff = mdata->filelen;
2473
2474 symtab->nsyms = bfd_get_symcount (abfd);
2475 mdata->filelen += symtab->nsyms * symlen;
2476 }
2477
2478 /* Build the dysymtab. */
2479 if (dysymtab != NULL)
2480 if (!bfd_mach_o_build_dysymtab (abfd, dysymtab))
2481 return FALSE;
2482
2483 /* Write symtab and strtab. */
2484 if (symtab != NULL)
2485 if (!bfd_mach_o_write_symtab_content (abfd, symtab))
2486 return FALSE;
2487
2488 /* Adjust linkedit size. */
2489 if (linkedit != NULL)
2490 {
2491 /* bfd_vma pagemask = bfd_mach_o_get_backend_data (abfd)->page_size - 1; */
2492
2493 linkedit->vmsize = mdata->filelen - linkedit->fileoff;
2494 /* linkedit->vmsize = (linkedit->vmsize + pagemask) & ~pagemask; */
2495 linkedit->filesize = mdata->filelen - linkedit->fileoff;
2496
2497 linkedit->initprot = BFD_MACH_O_PROT_READ;
2498 linkedit->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
2499 | BFD_MACH_O_PROT_EXECUTE;
2500 }
2501
2502 /* Second pass: write commands. */
2503 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
2504 {
2505 struct mach_o_load_command_external raw;
2506 unsigned long typeflag;
2507
2508 typeflag = cmd->type | (cmd->type_required ? BFD_MACH_O_LC_REQ_DYLD : 0);
2509
2510 bfd_h_put_32 (abfd, typeflag, raw.cmd);
2511 bfd_h_put_32 (abfd, cmd->len, raw.cmdsize);
2512
2513 if (bfd_seek (abfd, cmd->offset, SEEK_SET) != 0
2514 || bfd_bwrite (&raw, BFD_MACH_O_LC_SIZE, abfd) != 8)
2515 return FALSE;
2516
2517 switch (cmd->type)
2518 {
2519 case BFD_MACH_O_LC_SEGMENT:
2520 if (!bfd_mach_o_write_segment_32 (abfd, cmd))
2521 return FALSE;
2522 break;
2523 case BFD_MACH_O_LC_SEGMENT_64:
2524 if (!bfd_mach_o_write_segment_64 (abfd, cmd))
2525 return FALSE;
2526 break;
2527 case BFD_MACH_O_LC_SYMTAB:
2528 if (!bfd_mach_o_write_symtab (abfd, cmd))
2529 return FALSE;
2530 break;
2531 case BFD_MACH_O_LC_DYSYMTAB:
2532 if (!bfd_mach_o_write_dysymtab (abfd, cmd))
2533 return FALSE;
2534 break;
2535 case BFD_MACH_O_LC_THREAD:
2536 case BFD_MACH_O_LC_UNIXTHREAD:
2537 if (!bfd_mach_o_write_thread (abfd, cmd))
2538 return FALSE;
2539 break;
2540 case BFD_MACH_O_LC_LOAD_DYLIB:
2541 if (!bfd_mach_o_write_dylib (abfd, cmd))
2542 return FALSE;
2543 break;
2544 case BFD_MACH_O_LC_LOAD_DYLINKER:
2545 if (!bfd_mach_o_write_dylinker (abfd, cmd))
2546 return FALSE;
2547 break;
2548 case BFD_MACH_O_LC_MAIN:
2549 if (!bfd_mach_o_write_main (abfd, cmd))
2550 return FALSE;
2551 break;
2552 case BFD_MACH_O_LC_DYLD_INFO:
2553 if (!bfd_mach_o_write_dyld_info (abfd, cmd))
2554 return FALSE;
2555 break;
2556 default:
2557 (*_bfd_error_handler)
2558 (_("unable to write unknown load command 0x%lx"),
2559 (unsigned long) cmd->type);
2560 return FALSE;
2561 }
2562 }
2563
2564 return TRUE;
2565 }
2566
2567 static void
2568 bfd_mach_o_append_section_to_segment (bfd_mach_o_segment_command *seg,
2569 bfd_mach_o_section *s)
2570 {
2571 if (seg->sect_head == NULL)
2572 seg->sect_head = s;
2573 else
2574 seg->sect_tail->next = s;
2575 seg->sect_tail = s;
2576 }
2577
2578 /* Create section Mach-O flags from BFD flags. */
2579
2580 static void
2581 bfd_mach_o_set_section_flags_from_bfd (bfd *abfd ATTRIBUTE_UNUSED,
2582 asection *sec)
2583 {
2584 flagword bfd_flags;
2585 bfd_mach_o_section *s = bfd_mach_o_get_mach_o_section (sec);
2586
2587 /* Create default flags. */
2588 bfd_flags = bfd_get_section_flags (abfd, sec);
2589 if ((bfd_flags & SEC_CODE) == SEC_CODE)
2590 s->flags = BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS
2591 | BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS
2592 | BFD_MACH_O_S_REGULAR;
2593 else if ((bfd_flags & (SEC_ALLOC | SEC_LOAD)) == SEC_ALLOC)
2594 s->flags = BFD_MACH_O_S_ZEROFILL;
2595 else if (bfd_flags & SEC_DEBUGGING)
2596 s->flags = BFD_MACH_O_S_REGULAR | BFD_MACH_O_S_ATTR_DEBUG;
2597 else
2598 s->flags = BFD_MACH_O_S_REGULAR;
2599 }
2600
2601 static bfd_boolean
2602 bfd_mach_o_build_obj_seg_command (bfd *abfd, bfd_mach_o_segment_command *seg)
2603 {
2604 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2605 unsigned int i, j;
2606
2607 seg->vmaddr = 0;
2608 seg->fileoff = mdata->filelen;
2609 seg->initprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
2610 | BFD_MACH_O_PROT_EXECUTE;
2611 seg->maxprot = seg->initprot;
2612
2613 /* Append sections to the segment.
2614
2615 This is a little tedious, we have to honor the need to account zerofill
2616 sections after all the rest. This forces us to do the calculation of
2617 total vmsize in three passes so that any alignment increments are
2618 properly accounted. */
2619 for (i = 0; i < mdata->nsects; ++i)
2620 {
2621 bfd_mach_o_section *s = mdata->sections[i];
2622 asection *sec = s->bfdsection;
2623
2624 /* Although we account for zerofill section sizes in vm order, they are
2625 placed in the file in source sequence. */
2626 bfd_mach_o_append_section_to_segment (seg, s);
2627 s->offset = 0;
2628
2629 /* Zerofill sections have zero file size & offset, the only content
2630 written to the file is the symbols. */
2631 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) == BFD_MACH_O_S_ZEROFILL
2632 || ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2633 == BFD_MACH_O_S_GB_ZEROFILL))
2634 continue;
2635
2636 /* The Darwin system tools (in MH_OBJECT files, at least) always account
2637 sections, even those with zero size. */
2638 if (s->size > 0)
2639 {
2640 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2641 seg->vmsize += s->size;
2642
2643 /* MH_OBJECT files have unaligned content. */
2644 if (1)
2645 {
2646 seg->filesize = FILE_ALIGN (seg->filesize, s->align);
2647 mdata->filelen = FILE_ALIGN (mdata->filelen, s->align);
2648 }
2649 seg->filesize += s->size;
2650
2651 /* The system tools write even zero-sized sections with an offset
2652 field set to the current file position. */
2653 s->offset = mdata->filelen;
2654 }
2655
2656 sec->filepos = s->offset;
2657 mdata->filelen += s->size;
2658 }
2659
2660 /* Now pass through again, for zerofill, only now we just update the
2661 vmsize, and then for zerofill_GB. */
2662 for (j = 0; j < 2; j++)
2663 {
2664 unsigned int stype;
2665
2666 if (j == 0)
2667 stype = BFD_MACH_O_S_ZEROFILL;
2668 else
2669 stype = BFD_MACH_O_S_GB_ZEROFILL;
2670
2671 for (i = 0; i < mdata->nsects; ++i)
2672 {
2673 bfd_mach_o_section *s = mdata->sections[i];
2674
2675 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != stype)
2676 continue;
2677
2678 if (s->size > 0)
2679 {
2680 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2681 seg->vmsize += s->size;
2682 }
2683 }
2684 }
2685
2686 /* Allocate space for the relocations. */
2687 mdata->filelen = FILE_ALIGN (mdata->filelen, 2);
2688
2689 for (i = 0; i < mdata->nsects; ++i)
2690 {
2691 bfd_mach_o_section *ms = mdata->sections[i];
2692 asection *sec = ms->bfdsection;
2693
2694 ms->nreloc = sec->reloc_count;
2695 if (ms->nreloc == 0)
2696 {
2697 /* Clear nreloc and reloff if there is no relocs. */
2698 ms->reloff = 0;
2699 continue;
2700 }
2701 sec->rel_filepos = mdata->filelen;
2702 ms->reloff = sec->rel_filepos;
2703 mdata->filelen += sec->reloc_count * BFD_MACH_O_RELENT_SIZE;
2704 }
2705
2706 return TRUE;
2707 }
2708
2709 static bfd_boolean
2710 bfd_mach_o_build_exec_seg_command (bfd *abfd, bfd_mach_o_segment_command *seg)
2711 {
2712 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2713 unsigned int i;
2714 bfd_vma pagemask = bfd_mach_o_get_backend_data (abfd)->page_size - 1;
2715 bfd_vma vma;
2716 bfd_mach_o_section *s;
2717
2718 seg->vmsize = 0;
2719
2720 seg->fileoff = mdata->filelen;
2721 seg->maxprot = 0;
2722 seg->initprot = 0;
2723 seg->flags = 0;
2724
2725 /* Append sections to the segment. We assume they are properly ordered
2726 by vma (but we check that). */
2727 vma = 0;
2728 for (i = 0; i < mdata->nsects; ++i)
2729 {
2730 s = mdata->sections[i];
2731
2732 /* Consider only sections for this segment. */
2733 if (strcmp (seg->segname, s->segname) != 0)
2734 continue;
2735
2736 bfd_mach_o_append_section_to_segment (seg, s);
2737
2738 BFD_ASSERT (s->addr >= vma);
2739 vma = s->addr + s->size;
2740 }
2741
2742 /* Set segment file offset: make it page aligned. */
2743 vma = seg->sect_head->addr;
2744 seg->vmaddr = vma & ~pagemask;
2745 if ((mdata->filelen & pagemask) > (vma & pagemask))
2746 mdata->filelen += pagemask + 1;
2747 seg->fileoff = mdata->filelen & ~pagemask;
2748 mdata->filelen = seg->fileoff + (vma & pagemask);
2749
2750 /* Set section file offset. */
2751 for (s = seg->sect_head; s != NULL; s = s->next)
2752 {
2753 asection *sec = s->bfdsection;
2754 flagword flags = bfd_get_section_flags (abfd, sec);
2755
2756 /* Adjust segment size. */
2757 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2758 seg->vmsize += s->size;
2759
2760 /* File offset and length. */
2761 seg->filesize = FILE_ALIGN (seg->filesize, s->align);
2762
2763 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != BFD_MACH_O_S_ZEROFILL
2764 && ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2765 != BFD_MACH_O_S_GB_ZEROFILL))
2766 {
2767 mdata->filelen = FILE_ALIGN (mdata->filelen, s->align);
2768
2769 s->offset = mdata->filelen;
2770 s->bfdsection->filepos = s->offset;
2771
2772 seg->filesize += s->size;
2773 mdata->filelen += s->size;
2774 }
2775 else
2776 {
2777 s->offset = 0;
2778 s->bfdsection->filepos = 0;
2779 }
2780
2781 /* Set protection. */
2782 if (flags & SEC_LOAD)
2783 {
2784 if (flags & SEC_CODE)
2785 seg->initprot |= BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_EXECUTE;
2786 if ((flags & (SEC_DATA | SEC_READONLY)) == SEC_DATA)
2787 seg->initprot |= BFD_MACH_O_PROT_WRITE | BFD_MACH_O_PROT_READ;
2788 }
2789
2790 /* Relocs shouldn't appear in non-object files. */
2791 if (s->bfdsection->reloc_count != 0)
2792 return FALSE;
2793 }
2794
2795 /* Set maxprot. */
2796 if (seg->initprot != 0)
2797 seg->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
2798 | BFD_MACH_O_PROT_EXECUTE;
2799 else
2800 seg->maxprot = 0;
2801
2802 /* Round segment size (and file size). */
2803 seg->vmsize = (seg->vmsize + pagemask) & ~pagemask;
2804 seg->filesize = (seg->filesize + pagemask) & ~pagemask;
2805 mdata->filelen = (mdata->filelen + pagemask) & ~pagemask;
2806
2807 return TRUE;
2808 }
2809
2810 /* Layout the commands: set commands size and offset, set ncmds and sizeofcmds
2811 fields in header. */
2812
2813 static void
2814 bfd_mach_o_layout_commands (bfd_mach_o_data_struct *mdata)
2815 {
2816 unsigned wide = mach_o_wide_p (&mdata->header);
2817 unsigned int hdrlen;
2818 ufile_ptr offset;
2819 bfd_mach_o_load_command *cmd;
2820 unsigned int align;
2821
2822 hdrlen = wide ? BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
2823 align = wide ? 8 - 1 : 4 - 1;
2824 offset = hdrlen;
2825 mdata->header.ncmds = 0;
2826
2827 for (cmd = mdata->first_command; cmd; cmd = cmd->next)
2828 {
2829 mdata->header.ncmds++;
2830 cmd->offset = offset;
2831
2832 switch (cmd->type)
2833 {
2834 case BFD_MACH_O_LC_SEGMENT_64:
2835 cmd->len = BFD_MACH_O_LC_SEGMENT_64_SIZE
2836 + BFD_MACH_O_SECTION_64_SIZE * cmd->command.segment.nsects;
2837 break;
2838 case BFD_MACH_O_LC_SEGMENT:
2839 cmd->len = BFD_MACH_O_LC_SEGMENT_SIZE
2840 + BFD_MACH_O_SECTION_SIZE * cmd->command.segment.nsects;
2841 break;
2842 case BFD_MACH_O_LC_SYMTAB:
2843 cmd->len = sizeof (struct mach_o_symtab_command_external)
2844 + BFD_MACH_O_LC_SIZE;
2845 break;
2846 case BFD_MACH_O_LC_DYSYMTAB:
2847 cmd->len = sizeof (struct mach_o_dysymtab_command_external)
2848 + BFD_MACH_O_LC_SIZE;
2849 break;
2850 case BFD_MACH_O_LC_LOAD_DYLIB:
2851 cmd->len = sizeof (struct mach_o_dylib_command_external)
2852 + BFD_MACH_O_LC_SIZE;
2853 cmd->command.dylib.name_offset = cmd->len;
2854 cmd->len += strlen (cmd->command.dylib.name_str);
2855 cmd->len = (cmd->len + align) & ~align;
2856 break;
2857 case BFD_MACH_O_LC_LOAD_DYLINKER:
2858 cmd->len = sizeof (struct mach_o_str_command_external)
2859 + BFD_MACH_O_LC_SIZE;
2860 cmd->command.dylinker.name_offset = cmd->len;
2861 cmd->len += strlen (cmd->command.dylinker.name_str);
2862 cmd->len = (cmd->len + align) & ~align;
2863 break;
2864 case BFD_MACH_O_LC_MAIN:
2865 cmd->len = sizeof (struct mach_o_entry_point_command_external)
2866 + BFD_MACH_O_LC_SIZE;
2867 break;
2868 case BFD_MACH_O_LC_DYLD_INFO:
2869 cmd->len = sizeof (struct mach_o_dyld_info_command_external)
2870 + BFD_MACH_O_LC_SIZE;
2871 break;
2872 default:
2873 (*_bfd_error_handler)
2874 (_("unable to layout unknown load command 0x%lx"),
2875 (unsigned long) cmd->type);
2876 break;
2877 }
2878
2879 BFD_ASSERT (cmd->len % (align + 1) == 0);
2880 offset += cmd->len;
2881 }
2882 mdata->header.sizeofcmds = offset - hdrlen;
2883 mdata->filelen = offset;
2884 }
2885
2886 /* Subroutine of bfd_mach_o_build_commands: set type, name and nsects of a
2887 segment. */
2888
2889 static void
2890 bfd_mach_o_init_segment (bfd_mach_o_data_struct *mdata,
2891 bfd_mach_o_load_command *cmd,
2892 const char *segname, unsigned int nbr_sect)
2893 {
2894 bfd_mach_o_segment_command *seg = &cmd->command.segment;
2895 unsigned wide = mach_o_wide_p (&mdata->header);
2896
2897 /* Init segment command. */
2898 cmd->type = wide ? BFD_MACH_O_LC_SEGMENT_64 : BFD_MACH_O_LC_SEGMENT;
2899 cmd->type_required = FALSE;
2900
2901 strcpy (seg->segname, segname);
2902 seg->nsects = nbr_sect;
2903
2904 seg->vmaddr = 0;
2905 seg->vmsize = 0;
2906
2907 seg->fileoff = 0;
2908 seg->filesize = 0;
2909 seg->maxprot = 0;
2910 seg->initprot = 0;
2911 seg->flags = 0;
2912 seg->sect_head = NULL;
2913 seg->sect_tail = NULL;
2914 }
2915
2916 /* Build Mach-O load commands (currently assuming an MH_OBJECT file).
2917 TODO: Other file formats, rebuilding symtab/dysymtab commands for strip
2918 and copy functionality. */
2919
2920 bfd_boolean
2921 bfd_mach_o_build_commands (bfd *abfd)
2922 {
2923 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2924 unsigned wide = mach_o_wide_p (&mdata->header);
2925 unsigned int nbr_segcmd = 0;
2926 bfd_mach_o_load_command *commands;
2927 unsigned int nbr_commands;
2928 int symtab_idx = -1;
2929 int dysymtab_idx = -1;
2930 int main_idx = -1;
2931 unsigned int i;
2932
2933 /* Return now if already built. */
2934 if (mdata->header.ncmds != 0)
2935 return TRUE;
2936
2937 /* Fill in the file type, if not already set. */
2938 if (mdata->header.filetype == 0)
2939 {
2940 if (abfd->flags & EXEC_P)
2941 mdata->header.filetype = BFD_MACH_O_MH_EXECUTE;
2942 else if (abfd->flags & DYNAMIC)
2943 mdata->header.filetype = BFD_MACH_O_MH_DYLIB;
2944 else
2945 mdata->header.filetype = BFD_MACH_O_MH_OBJECT;
2946 }
2947
2948 /* If hasn't already been done, flatten sections list, and sort
2949 if/when required. Must be done before the symbol table is adjusted,
2950 since that depends on properly numbered sections. */
2951 if (mdata->nsects == 0 || mdata->sections == NULL)
2952 if (! bfd_mach_o_mangle_sections (abfd, mdata))
2953 return FALSE;
2954
2955 /* Order the symbol table, fill-in/check mach-o specific fields and
2956 partition out any indirect symbols. */
2957 if (!bfd_mach_o_mangle_symbols (abfd))
2958 return FALSE;
2959
2960 /* Segment commands. */
2961 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT)
2962 {
2963 /* Only one segment for all the sections. But the segment is
2964 optional if there is no sections. */
2965 nbr_segcmd = (mdata->nsects > 0) ? 1 : 0;
2966 }
2967 else
2968 {
2969 bfd_mach_o_section *prev_sect = NULL;
2970
2971 /* One pagezero segment and one linkedit segment. */
2972 nbr_segcmd = 2;
2973
2974 /* Create one segment for associated segment name in sections.
2975 Assume that sections with the same segment name are consecutive. */
2976 for (i = 0; i < mdata->nsects; i++)
2977 {
2978 bfd_mach_o_section *this_sect = mdata->sections[i];
2979
2980 if (prev_sect == NULL
2981 || strcmp (prev_sect->segname, this_sect->segname) != 0)
2982 {
2983 nbr_segcmd++;
2984 prev_sect = this_sect;
2985 }
2986 }
2987 }
2988
2989 nbr_commands = nbr_segcmd;
2990
2991 /* One command for the symbol table (only if there are symbols. */
2992 if (bfd_get_symcount (abfd) > 0)
2993 symtab_idx = nbr_commands++;
2994
2995 /* FIXME:
2996 This is a rather crude test for whether we should build a dysymtab. */
2997 if (bfd_mach_o_should_emit_dysymtab ()
2998 && bfd_get_symcount (abfd))
2999 {
3000 /* If there should be a case where a dysymtab could be emitted without
3001 a symtab (seems improbable), this would need amending. */
3002 dysymtab_idx = nbr_commands++;
3003 }
3004
3005 /* Add an entry point command. */
3006 if (mdata->header.filetype == BFD_MACH_O_MH_EXECUTE
3007 && bfd_get_start_address (abfd) != 0)
3008 main_idx = nbr_commands++;
3009
3010 /* Well, we must have a header, at least. */
3011 mdata->filelen = wide ? BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
3012
3013 /* A bit unusual, but no content is valid;
3014 as -n empty.s -o empty.o */
3015 if (nbr_commands == 0)
3016 {
3017 /* Layout commands (well none...) and set headers command fields. */
3018 bfd_mach_o_layout_commands (mdata);
3019 return TRUE;
3020 }
3021
3022 /* Create commands for segments (and symtabs), prepend them. */
3023 commands = bfd_zalloc (abfd, nbr_commands * sizeof (bfd_mach_o_load_command));
3024 if (commands == NULL)
3025 return FALSE;
3026 for (i = 0; i < nbr_commands - 1; i++)
3027 commands[i].next = &commands[i + 1];
3028 commands[nbr_commands - 1].next = mdata->first_command;
3029 if (mdata->first_command == NULL)
3030 mdata->last_command = &commands[nbr_commands - 1];
3031 mdata->first_command = &commands[0];
3032
3033 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT && nbr_segcmd != 0)
3034 {
3035 /* For object file, there is only one segment. */
3036 bfd_mach_o_init_segment (mdata, &commands[0], "", mdata->nsects);
3037 }
3038 else if (nbr_segcmd != 0)
3039 {
3040 bfd_mach_o_load_command *cmd;
3041
3042 BFD_ASSERT (nbr_segcmd >= 2);
3043
3044 /* The pagezero. */
3045 cmd = &commands[0];
3046 bfd_mach_o_init_segment (mdata, cmd, "__PAGEZERO", 0);
3047
3048 /* Segments from sections. */
3049 cmd++;
3050 for (i = 0; i < mdata->nsects;)
3051 {
3052 const char *segname = mdata->sections[i]->segname;
3053 unsigned int nbr_sect = 1;
3054
3055 /* Count number of sections for this segment. */
3056 for (i++; i < mdata->nsects; i++)
3057 if (strcmp (mdata->sections[i]->segname, segname) == 0)
3058 nbr_sect++;
3059 else
3060 break;
3061
3062 bfd_mach_o_init_segment (mdata, cmd, segname, nbr_sect);
3063 cmd++;
3064 }
3065
3066 /* The linkedit. */
3067 bfd_mach_o_init_segment (mdata, cmd, "__LINKEDIT", 0);
3068 }
3069
3070 if (symtab_idx >= 0)
3071 {
3072 /* Init symtab command. */
3073 bfd_mach_o_load_command *cmd = &commands[symtab_idx];
3074
3075 cmd->type = BFD_MACH_O_LC_SYMTAB;
3076 cmd->type_required = FALSE;
3077 }
3078
3079 /* If required, setup symtab command, see comment above about the quality
3080 of this test. */
3081 if (dysymtab_idx >= 0)
3082 {
3083 bfd_mach_o_load_command *cmd = &commands[dysymtab_idx];
3084
3085 cmd->type = BFD_MACH_O_LC_DYSYMTAB;
3086 cmd->type_required = FALSE;
3087 }
3088
3089 /* Create the main command. */
3090 if (main_idx >= 0)
3091 {
3092 bfd_mach_o_load_command *cmd = &commands[main_idx];
3093
3094 cmd->type = BFD_MACH_O_LC_MAIN;
3095 cmd->type_required = TRUE;
3096
3097 cmd->command.main.entryoff = 0;
3098 cmd->command.main.stacksize = 0;
3099 }
3100
3101 /* Layout commands. */
3102 bfd_mach_o_layout_commands (mdata);
3103
3104 /* So, now we have sized the commands and the filelen set to that.
3105 Now we can build the segment command and set the section file offsets. */
3106 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT)
3107 {
3108 for (i = 0; i < nbr_segcmd; i++)
3109 if (!bfd_mach_o_build_obj_seg_command
3110 (abfd, &commands[i].command.segment))
3111 return FALSE;
3112 }
3113 else
3114 {
3115 bfd_vma maxvma = 0;
3116
3117 /* Skip pagezero and linkedit segments. */
3118 for (i = 1; i < nbr_segcmd - 1; i++)
3119 {
3120 bfd_mach_o_segment_command *seg = &commands[i].command.segment;
3121
3122 if (!bfd_mach_o_build_exec_seg_command (abfd, seg))
3123 return FALSE;
3124
3125 if (seg->vmaddr + seg->vmsize > maxvma)
3126 maxvma = seg->vmaddr + seg->vmsize;
3127 }
3128
3129 /* Set the size of __PAGEZERO. */
3130 commands[0].command.segment.vmsize =
3131 commands[1].command.segment.vmaddr;
3132
3133 /* Set the vma and fileoff of __LINKEDIT. */
3134 commands[nbr_segcmd - 1].command.segment.vmaddr = maxvma;
3135 commands[nbr_segcmd - 1].command.segment.fileoff = mdata->filelen;
3136
3137 /* Set entry point (once segments have been laid out). */
3138 if (main_idx >= 0)
3139 commands[main_idx].command.main.entryoff =
3140 bfd_get_start_address (abfd) - commands[1].command.segment.vmaddr;
3141 }
3142
3143 return TRUE;
3144 }
3145
3146 /* Set the contents of a section. */
3147
3148 bfd_boolean
3149 bfd_mach_o_set_section_contents (bfd *abfd,
3150 asection *section,
3151 const void * location,
3152 file_ptr offset,
3153 bfd_size_type count)
3154 {
3155 file_ptr pos;
3156
3157 /* Trying to write the first section contents will trigger the creation of
3158 the load commands if they are not already present. */
3159 if (!abfd->output_has_begun && !bfd_mach_o_build_commands (abfd))
3160 return FALSE;
3161
3162 if (count == 0)
3163 return TRUE;
3164
3165 pos = section->filepos + offset;
3166 if (bfd_seek (abfd, pos, SEEK_SET) != 0
3167 || bfd_bwrite (location, count, abfd) != count)
3168 return FALSE;
3169
3170 return TRUE;
3171 }
3172
3173 int
3174 bfd_mach_o_sizeof_headers (bfd *a ATTRIBUTE_UNUSED,
3175 struct bfd_link_info *info ATTRIBUTE_UNUSED)
3176 {
3177 return 0;
3178 }
3179
3180 /* Make an empty symbol. This is required only because
3181 bfd_make_section_anyway wants to create a symbol for the section. */
3182
3183 asymbol *
3184 bfd_mach_o_make_empty_symbol (bfd *abfd)
3185 {
3186 asymbol *new_symbol;
3187
3188 new_symbol = bfd_zalloc (abfd, sizeof (bfd_mach_o_asymbol));
3189 if (new_symbol == NULL)
3190 return new_symbol;
3191 new_symbol->the_bfd = abfd;
3192 new_symbol->udata.i = SYM_MACHO_FIELDS_UNSET;
3193 return new_symbol;
3194 }
3195
3196 static bfd_boolean
3197 bfd_mach_o_read_header (bfd *abfd, bfd_mach_o_header *header)
3198 {
3199 struct mach_o_header_external raw;
3200 unsigned int size;
3201 bfd_vma (*get32) (const void *) = NULL;
3202
3203 /* Just read the magic number. */
3204 if (bfd_seek (abfd, 0, SEEK_SET) != 0
3205 || bfd_bread (raw.magic, sizeof (raw.magic), abfd) != 4)
3206 return FALSE;
3207
3208 if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC)
3209 {
3210 header->byteorder = BFD_ENDIAN_BIG;
3211 header->magic = BFD_MACH_O_MH_MAGIC;
3212 header->version = 1;
3213 get32 = bfd_getb32;
3214 }
3215 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC)
3216 {
3217 header->byteorder = BFD_ENDIAN_LITTLE;
3218 header->magic = BFD_MACH_O_MH_MAGIC;
3219 header->version = 1;
3220 get32 = bfd_getl32;
3221 }
3222 else if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64)
3223 {
3224 header->byteorder = BFD_ENDIAN_BIG;
3225 header->magic = BFD_MACH_O_MH_MAGIC_64;
3226 header->version = 2;
3227 get32 = bfd_getb32;
3228 }
3229 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64)
3230 {
3231 header->byteorder = BFD_ENDIAN_LITTLE;
3232 header->magic = BFD_MACH_O_MH_MAGIC_64;
3233 header->version = 2;
3234 get32 = bfd_getl32;
3235 }
3236 else
3237 {
3238 header->byteorder = BFD_ENDIAN_UNKNOWN;
3239 return FALSE;
3240 }
3241
3242 /* Once the size of the header is known, read the full header. */
3243 size = mach_o_wide_p (header) ?
3244 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
3245
3246 if (bfd_seek (abfd, 0, SEEK_SET) != 0
3247 || bfd_bread (&raw, size, abfd) != size)
3248 return FALSE;
3249
3250 header->cputype = (*get32) (raw.cputype);
3251 header->cpusubtype = (*get32) (raw.cpusubtype);
3252 header->filetype = (*get32) (raw.filetype);
3253 header->ncmds = (*get32) (raw.ncmds);
3254 header->sizeofcmds = (*get32) (raw.sizeofcmds);
3255 header->flags = (*get32) (raw.flags);
3256
3257 if (mach_o_wide_p (header))
3258 header->reserved = (*get32) (raw.reserved);
3259 else
3260 header->reserved = 0;
3261
3262 return TRUE;
3263 }
3264
3265 bfd_boolean
3266 bfd_mach_o_new_section_hook (bfd *abfd, asection *sec)
3267 {
3268 bfd_mach_o_section *s;
3269 unsigned bfdalign = bfd_get_section_alignment (abfd, sec);
3270
3271 s = bfd_mach_o_get_mach_o_section (sec);
3272 if (s == NULL)
3273 {
3274 flagword bfd_flags;
3275 static const mach_o_section_name_xlat * xlat;
3276
3277 s = (bfd_mach_o_section *) bfd_zalloc (abfd, sizeof (*s));
3278 if (s == NULL)
3279 return FALSE;
3280 sec->used_by_bfd = s;
3281 s->bfdsection = sec;
3282
3283 /* Create the Darwin seg/sect name pair from the bfd name.
3284 If this is a canonical name for which a specific paiting exists
3285 there will also be defined flags, type, attribute and alignment
3286 values. */
3287 xlat = bfd_mach_o_convert_section_name_to_mach_o (abfd, sec, s);
3288 if (xlat != NULL)
3289 {
3290 s->flags = xlat->macho_sectype | xlat->macho_secattr;
3291 s->align = xlat->sectalign > bfdalign ? xlat->sectalign
3292 : bfdalign;
3293 (void) bfd_set_section_alignment (abfd, sec, s->align);
3294 bfd_flags = bfd_get_section_flags (abfd, sec);
3295 if (bfd_flags == SEC_NO_FLAGS)
3296 bfd_set_section_flags (abfd, sec, xlat->bfd_flags);
3297 }
3298 else
3299 /* Create default flags. */
3300 bfd_mach_o_set_section_flags_from_bfd (abfd, sec);
3301 }
3302
3303 return _bfd_generic_new_section_hook (abfd, sec);
3304 }
3305
3306 static void
3307 bfd_mach_o_init_section_from_mach_o (bfd *abfd, asection *sec,
3308 unsigned long prot)
3309 {
3310 flagword flags;
3311 bfd_mach_o_section *section;
3312
3313 flags = bfd_get_section_flags (abfd, sec);
3314 section = bfd_mach_o_get_mach_o_section (sec);
3315
3316 /* TODO: see if we should use the xlat system for doing this by
3317 preference and fall back to this for unknown sections. */
3318
3319 if (flags == SEC_NO_FLAGS)
3320 {
3321 /* Try to guess flags. */
3322 if (section->flags & BFD_MACH_O_S_ATTR_DEBUG)
3323 flags = SEC_DEBUGGING;
3324 else
3325 {
3326 flags = SEC_ALLOC;
3327 if ((section->flags & BFD_MACH_O_SECTION_TYPE_MASK)
3328 != BFD_MACH_O_S_ZEROFILL)
3329 {
3330 flags |= SEC_LOAD;
3331 if (prot & BFD_MACH_O_PROT_EXECUTE)
3332 flags |= SEC_CODE;
3333 if (prot & BFD_MACH_O_PROT_WRITE)
3334 flags |= SEC_DATA;
3335 else if (prot & BFD_MACH_O_PROT_READ)
3336 flags |= SEC_READONLY;
3337 }
3338 }
3339 }
3340 else
3341 {
3342 if ((flags & SEC_DEBUGGING) == 0)
3343 flags |= SEC_ALLOC;
3344 }
3345
3346 if (section->offset != 0)
3347 flags |= SEC_HAS_CONTENTS;
3348 if (section->nreloc != 0)
3349 flags |= SEC_RELOC;
3350
3351 bfd_set_section_flags (abfd, sec, flags);
3352
3353 sec->vma = section->addr;
3354 sec->lma = section->addr;
3355 sec->size = section->size;
3356 sec->filepos = section->offset;
3357 sec->alignment_power = section->align;
3358 sec->segment_mark = 0;
3359 sec->reloc_count = section->nreloc;
3360 sec->rel_filepos = section->reloff;
3361 }
3362
3363 static asection *
3364 bfd_mach_o_make_bfd_section (bfd *abfd,
3365 const unsigned char *segname,
3366 const unsigned char *sectname)
3367 {
3368 const char *sname;
3369 flagword flags;
3370
3371 bfd_mach_o_convert_section_name_to_bfd
3372 (abfd, (const char *)segname, (const char *)sectname, &sname, &flags);
3373 if (sname == NULL)
3374 return NULL;
3375
3376 return bfd_make_section_anyway_with_flags (abfd, sname, flags);
3377 }
3378
3379 static asection *
3380 bfd_mach_o_read_section_32 (bfd *abfd,
3381 unsigned int offset,
3382 unsigned long prot)
3383 {
3384 struct mach_o_section_32_external raw;
3385 asection *sec;
3386 bfd_mach_o_section *section;
3387
3388 if (bfd_seek (abfd, offset, SEEK_SET) != 0
3389 || (bfd_bread (&raw, BFD_MACH_O_SECTION_SIZE, abfd)
3390 != BFD_MACH_O_SECTION_SIZE))
3391 return NULL;
3392
3393 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname);
3394 if (sec == NULL)
3395 return NULL;
3396
3397 section = bfd_mach_o_get_mach_o_section (sec);
3398 memcpy (section->segname, raw.segname, sizeof (raw.segname));
3399 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0;
3400 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname));
3401 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0;
3402 section->addr = bfd_h_get_32 (abfd, raw.addr);
3403 section->size = bfd_h_get_32 (abfd, raw.size);
3404 section->offset = bfd_h_get_32 (abfd, raw.offset);
3405 section->align = bfd_h_get_32 (abfd, raw.align);
3406 section->reloff = bfd_h_get_32 (abfd, raw.reloff);
3407 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc);
3408 section->flags = bfd_h_get_32 (abfd, raw.flags);
3409 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1);
3410 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2);
3411 section->reserved3 = 0;
3412
3413 bfd_mach_o_init_section_from_mach_o (abfd, sec, prot);
3414
3415 return sec;
3416 }
3417
3418 static asection *
3419 bfd_mach_o_read_section_64 (bfd *abfd,
3420 unsigned int offset,
3421 unsigned long prot)
3422 {
3423 struct mach_o_section_64_external raw;
3424 asection *sec;
3425 bfd_mach_o_section *section;
3426
3427 if (bfd_seek (abfd, offset, SEEK_SET) != 0
3428 || (bfd_bread (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd)
3429 != BFD_MACH_O_SECTION_64_SIZE))
3430 return NULL;
3431
3432 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname);
3433 if (sec == NULL)
3434 return NULL;
3435
3436 section = bfd_mach_o_get_mach_o_section (sec);
3437 memcpy (section->segname, raw.segname, sizeof (raw.segname));
3438 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0;
3439 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname));
3440 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0;
3441 section->addr = bfd_h_get_64 (abfd, raw.addr);
3442 section->size = bfd_h_get_64 (abfd, raw.size);
3443 section->offset = bfd_h_get_32 (abfd, raw.offset);
3444 section->align = bfd_h_get_32 (abfd, raw.align);
3445 section->reloff = bfd_h_get_32 (abfd, raw.reloff);
3446 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc);
3447 section->flags = bfd_h_get_32 (abfd, raw.flags);
3448 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1);
3449 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2);
3450 section->reserved3 = bfd_h_get_32 (abfd, raw.reserved3);
3451
3452 bfd_mach_o_init_section_from_mach_o (abfd, sec, prot);
3453
3454 return sec;
3455 }
3456
3457 static asection *
3458 bfd_mach_o_read_section (bfd *abfd,
3459 unsigned int offset,
3460 unsigned long prot,
3461 unsigned int wide)
3462 {
3463 if (wide)
3464 return bfd_mach_o_read_section_64 (abfd, offset, prot);
3465 else
3466 return bfd_mach_o_read_section_32 (abfd, offset, prot);
3467 }
3468
3469 static bfd_boolean
3470 bfd_mach_o_read_symtab_symbol (bfd *abfd,
3471 bfd_mach_o_symtab_command *sym,
3472 bfd_mach_o_asymbol *s,
3473 unsigned long i)
3474 {
3475 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3476 unsigned int wide = mach_o_wide_p (&mdata->header);
3477 unsigned int symwidth =
3478 wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE;
3479 unsigned int symoff = sym->symoff + (i * symwidth);
3480 struct mach_o_nlist_64_external raw;
3481 unsigned char type = -1;
3482 unsigned char section = -1;
3483 short desc = -1;
3484 symvalue value = -1;
3485 unsigned long stroff = -1;
3486 unsigned int symtype = -1;
3487
3488 BFD_ASSERT (sym->strtab != NULL);
3489
3490 if (bfd_seek (abfd, symoff, SEEK_SET) != 0
3491 || bfd_bread (&raw, symwidth, abfd) != symwidth)
3492 {
3493 (*_bfd_error_handler)
3494 (_("bfd_mach_o_read_symtab_symbol: unable to read %d bytes at %lu"),
3495 symwidth, (unsigned long) symoff);
3496 return FALSE;
3497 }
3498
3499 stroff = bfd_h_get_32 (abfd, raw.n_strx);
3500 type = bfd_h_get_8 (abfd, raw.n_type);
3501 symtype = type & BFD_MACH_O_N_TYPE;
3502 section = bfd_h_get_8 (abfd, raw.n_sect);
3503 desc = bfd_h_get_16 (abfd, raw.n_desc);
3504 if (wide)
3505 value = bfd_h_get_64 (abfd, raw.n_value);
3506 else
3507 value = bfd_h_get_32 (abfd, raw.n_value);
3508
3509 if (stroff >= sym->strsize)
3510 {
3511 (*_bfd_error_handler)
3512 (_("bfd_mach_o_read_symtab_symbol: name out of range (%lu >= %lu)"),
3513 (unsigned long) stroff,
3514 (unsigned long) sym->strsize);
3515 return FALSE;
3516 }
3517
3518 s->symbol.the_bfd = abfd;
3519 s->symbol.name = sym->strtab + stroff;
3520 s->symbol.value = value;
3521 s->symbol.flags = 0x0;
3522 s->symbol.udata.i = i;
3523 s->n_type = type;
3524 s->n_sect = section;
3525 s->n_desc = desc;
3526
3527 if (type & BFD_MACH_O_N_STAB)
3528 {
3529 s->symbol.flags |= BSF_DEBUGGING;
3530 s->symbol.section = bfd_und_section_ptr;
3531 switch (type)
3532 {
3533 case N_FUN:
3534 case N_STSYM:
3535 case N_LCSYM:
3536 case N_BNSYM:
3537 case N_SLINE:
3538 case N_ENSYM:
3539 case N_ECOMM:
3540 case N_ECOML:
3541 case N_GSYM:
3542 if ((section > 0) && (section <= mdata->nsects))
3543 {
3544 s->symbol.section = mdata->sections[section - 1]->bfdsection;
3545 s->symbol.value =
3546 s->symbol.value - mdata->sections[section - 1]->addr;
3547 }
3548 break;
3549 }
3550 }
3551 else
3552 {
3553 if (type & (BFD_MACH_O_N_PEXT | BFD_MACH_O_N_EXT))
3554 s->symbol.flags |= BSF_GLOBAL;
3555 else
3556 s->symbol.flags |= BSF_LOCAL;
3557
3558 switch (symtype)
3559 {
3560 case BFD_MACH_O_N_UNDF:
3561 if (type == (BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT)
3562 && s->symbol.value != 0)
3563 {
3564 /* A common symbol. */
3565 s->symbol.section = bfd_com_section_ptr;
3566 s->symbol.flags = BSF_NO_FLAGS;
3567 }
3568 else
3569 {
3570 s->symbol.section = bfd_und_section_ptr;
3571 if (s->n_desc & BFD_MACH_O_N_WEAK_REF)
3572 s->symbol.flags |= BSF_WEAK;
3573 }
3574 break;
3575 case BFD_MACH_O_N_PBUD:
3576 s->symbol.section = bfd_und_section_ptr;
3577 break;
3578 case BFD_MACH_O_N_ABS:
3579 s->symbol.section = bfd_abs_section_ptr;
3580 break;
3581 case BFD_MACH_O_N_SECT:
3582 if ((section > 0) && (section <= mdata->nsects))
3583 {
3584 s->symbol.section = mdata->sections[section - 1]->bfdsection;
3585 s->symbol.value =
3586 s->symbol.value - mdata->sections[section - 1]->addr;
3587 }
3588 else
3589 {
3590 /* Mach-O uses 0 to mean "no section"; not an error. */
3591 if (section != 0)
3592 {
3593 (*_bfd_error_handler) (_("bfd_mach_o_read_symtab_symbol: "
3594 "symbol \"%s\" specified invalid section %d (max %lu): setting to undefined"),
3595 s->symbol.name, section, mdata->nsects);
3596 }
3597 s->symbol.section = bfd_und_section_ptr;
3598 }
3599 break;
3600 case BFD_MACH_O_N_INDR:
3601 /* FIXME: we don't follow the BFD convention as this indirect symbol
3602 won't be followed by the referenced one. This looks harmless
3603 unless we start using the linker. */
3604 s->symbol.flags |= BSF_INDIRECT;
3605 s->symbol.section = bfd_ind_section_ptr;
3606 s->symbol.value = 0;
3607 break;
3608 default:
3609 (*_bfd_error_handler) (_("bfd_mach_o_read_symtab_symbol: "
3610 "symbol \"%s\" specified invalid type field 0x%x: setting to undefined"),
3611 s->symbol.name, symtype);
3612 s->symbol.section = bfd_und_section_ptr;
3613 break;
3614 }
3615 }
3616
3617 return TRUE;
3618 }
3619
3620 bfd_boolean
3621 bfd_mach_o_read_symtab_strtab (bfd *abfd)
3622 {
3623 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3624 bfd_mach_o_symtab_command *sym = mdata->symtab;
3625
3626 /* Fail if there is no symtab. */
3627 if (sym == NULL)
3628 return FALSE;
3629
3630 /* Success if already loaded. */
3631 if (sym->strtab)
3632 return TRUE;
3633
3634 if (abfd->flags & BFD_IN_MEMORY)
3635 {
3636 struct bfd_in_memory *b;
3637
3638 b = (struct bfd_in_memory *) abfd->iostream;
3639
3640 if ((sym->stroff + sym->strsize) > b->size)
3641 {
3642 bfd_set_error (bfd_error_file_truncated);
3643 return FALSE;
3644 }
3645 sym->strtab = (char *) b->buffer + sym->stroff;
3646 }
3647 else
3648 {
3649 sym->strtab = bfd_alloc (abfd, sym->strsize);
3650 if (sym->strtab == NULL)
3651 return FALSE;
3652
3653 if (bfd_seek (abfd, sym->stroff, SEEK_SET) != 0
3654 || bfd_bread (sym->strtab, sym->strsize, abfd) != sym->strsize)
3655 {
3656 /* PR 17512: file: 10888-1609-0.004. */
3657 bfd_release (abfd, sym->strtab);
3658 sym->strtab = NULL;
3659 bfd_set_error (bfd_error_file_truncated);
3660 return FALSE;
3661 }
3662 }
3663
3664 return TRUE;
3665 }
3666
3667 bfd_boolean
3668 bfd_mach_o_read_symtab_symbols (bfd *abfd)
3669 {
3670 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3671 bfd_mach_o_symtab_command *sym = mdata->symtab;
3672 unsigned long i;
3673
3674 if (sym == NULL || sym->symbols)
3675 /* Return now if there are no symbols or if already loaded. */
3676 return TRUE;
3677
3678 sym->symbols = bfd_alloc (abfd, sym->nsyms * sizeof (bfd_mach_o_asymbol));
3679
3680 if (sym->symbols == NULL)
3681 {
3682 (*_bfd_error_handler) (_("bfd_mach_o_read_symtab_symbols: unable to allocate memory for symbols"));
3683 return FALSE;
3684 }
3685
3686 if (!bfd_mach_o_read_symtab_strtab (abfd))
3687 {
3688 bfd_release (abfd, sym->symbols);
3689 sym->symbols = NULL;
3690 return FALSE;
3691 }
3692
3693 for (i = 0; i < sym->nsyms; i++)
3694 {
3695 if (!bfd_mach_o_read_symtab_symbol (abfd, sym, &sym->symbols[i], i))
3696 {
3697 bfd_release (abfd, sym->symbols);
3698 sym->symbols = NULL;
3699 return FALSE;
3700 }
3701 }
3702
3703 return TRUE;
3704 }
3705
3706 static const char *
3707 bfd_mach_o_i386_flavour_string (unsigned int flavour)
3708 {
3709 switch ((int) flavour)
3710 {
3711 case BFD_MACH_O_x86_THREAD_STATE32: return "x86_THREAD_STATE32";
3712 case BFD_MACH_O_x86_FLOAT_STATE32: return "x86_FLOAT_STATE32";
3713 case BFD_MACH_O_x86_EXCEPTION_STATE32: return "x86_EXCEPTION_STATE32";
3714 case BFD_MACH_O_x86_THREAD_STATE64: return "x86_THREAD_STATE64";
3715 case BFD_MACH_O_x86_FLOAT_STATE64: return "x86_FLOAT_STATE64";
3716 case BFD_MACH_O_x86_EXCEPTION_STATE64: return "x86_EXCEPTION_STATE64";
3717 case BFD_MACH_O_x86_THREAD_STATE: return "x86_THREAD_STATE";
3718 case BFD_MACH_O_x86_FLOAT_STATE: return "x86_FLOAT_STATE";
3719 case BFD_MACH_O_x86_EXCEPTION_STATE: return "x86_EXCEPTION_STATE";
3720 case BFD_MACH_O_x86_DEBUG_STATE32: return "x86_DEBUG_STATE32";
3721 case BFD_MACH_O_x86_DEBUG_STATE64: return "x86_DEBUG_STATE64";
3722 case BFD_MACH_O_x86_DEBUG_STATE: return "x86_DEBUG_STATE";
3723 case BFD_MACH_O_x86_THREAD_STATE_NONE: return "x86_THREAD_STATE_NONE";
3724 default: return "UNKNOWN";
3725 }
3726 }
3727
3728 static const char *
3729 bfd_mach_o_ppc_flavour_string (unsigned int flavour)
3730 {
3731 switch ((int) flavour)
3732 {
3733 case BFD_MACH_O_PPC_THREAD_STATE: return "PPC_THREAD_STATE";
3734 case BFD_MACH_O_PPC_FLOAT_STATE: return "PPC_FLOAT_STATE";
3735 case BFD_MACH_O_PPC_EXCEPTION_STATE: return "PPC_EXCEPTION_STATE";
3736 case BFD_MACH_O_PPC_VECTOR_STATE: return "PPC_VECTOR_STATE";
3737 case BFD_MACH_O_PPC_THREAD_STATE64: return "PPC_THREAD_STATE64";
3738 case BFD_MACH_O_PPC_EXCEPTION_STATE64: return "PPC_EXCEPTION_STATE64";
3739 default: return "UNKNOWN";
3740 }
3741 }
3742
3743 static bfd_boolean
3744 bfd_mach_o_read_dylinker (bfd *abfd, bfd_mach_o_load_command *command)
3745 {
3746 bfd_mach_o_dylinker_command *cmd = &command->command.dylinker;
3747 struct mach_o_str_command_external raw;
3748 unsigned int nameoff;
3749 unsigned int namelen;
3750
3751 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3752 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3753 return FALSE;
3754
3755 nameoff = bfd_h_get_32 (abfd, raw.str);
3756
3757 cmd->name_offset = nameoff;
3758 namelen = command->len - nameoff;
3759 nameoff += command->offset;
3760 cmd->name_str = bfd_alloc (abfd, namelen);
3761 if (cmd->name_str == NULL)
3762 return FALSE;
3763 if (bfd_seek (abfd, nameoff, SEEK_SET) != 0
3764 || bfd_bread (cmd->name_str, namelen, abfd) != namelen)
3765 return FALSE;
3766 return TRUE;
3767 }
3768
3769 static bfd_boolean
3770 bfd_mach_o_read_dylib (bfd *abfd, bfd_mach_o_load_command *command)
3771 {
3772 bfd_mach_o_dylib_command *cmd = &command->command.dylib;
3773 struct mach_o_dylib_command_external raw;
3774 unsigned int nameoff;
3775 unsigned int namelen;
3776
3777 switch (command->type)
3778 {
3779 case BFD_MACH_O_LC_LOAD_DYLIB:
3780 case BFD_MACH_O_LC_LAZY_LOAD_DYLIB:
3781 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
3782 case BFD_MACH_O_LC_ID_DYLIB:
3783 case BFD_MACH_O_LC_REEXPORT_DYLIB:
3784 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
3785 break;
3786 default:
3787 BFD_FAIL ();
3788 return FALSE;
3789 }
3790
3791 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3792 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3793 return FALSE;
3794
3795 nameoff = bfd_h_get_32 (abfd, raw.name);
3796 cmd->timestamp = bfd_h_get_32 (abfd, raw.timestamp);
3797 cmd->current_version = bfd_h_get_32 (abfd, raw.current_version);
3798 cmd->compatibility_version = bfd_h_get_32 (abfd, raw.compatibility_version);
3799
3800 cmd->name_offset = command->offset + nameoff;
3801 namelen = command->len - nameoff;
3802 cmd->name_str = bfd_alloc (abfd, namelen);
3803 if (cmd->name_str == NULL)
3804 return FALSE;
3805 if (bfd_seek (abfd, cmd->name_offset, SEEK_SET) != 0
3806 || bfd_bread (cmd->name_str, namelen, abfd) != namelen)
3807 return FALSE;
3808 return TRUE;
3809 }
3810
3811 static bfd_boolean
3812 bfd_mach_o_read_prebound_dylib (bfd *abfd,
3813 bfd_mach_o_load_command *command)
3814 {
3815 bfd_mach_o_prebound_dylib_command *cmd = &command->command.prebound_dylib;
3816 struct mach_o_prebound_dylib_command_external raw;
3817 unsigned int nameoff;
3818 unsigned int modoff;
3819 unsigned int str_len;
3820 unsigned char *str;
3821
3822 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3823 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3824 return FALSE;
3825
3826 nameoff = bfd_h_get_32 (abfd, raw.name);
3827 modoff = bfd_h_get_32 (abfd, raw.linked_modules);
3828 if (nameoff > command->len || modoff > command->len)
3829 return FALSE;
3830
3831 str_len = command->len - sizeof (raw);
3832 str = bfd_alloc (abfd, str_len);
3833 if (str == NULL)
3834 return FALSE;
3835 if (bfd_bread (str, str_len, abfd) != str_len)
3836 return FALSE;
3837
3838 cmd->name_offset = command->offset + nameoff;
3839 cmd->nmodules = bfd_h_get_32 (abfd, raw.nmodules);
3840 cmd->linked_modules_offset = command->offset + modoff;
3841
3842 cmd->name_str = (char *)str + nameoff - (sizeof (raw) + BFD_MACH_O_LC_SIZE);
3843 cmd->linked_modules = str + modoff - (sizeof (raw) + BFD_MACH_O_LC_SIZE);
3844 return TRUE;
3845 }
3846
3847 static bfd_boolean
3848 bfd_mach_o_read_prebind_cksum (bfd *abfd,
3849 bfd_mach_o_load_command *command)
3850 {
3851 bfd_mach_o_prebind_cksum_command *cmd = &command->command.prebind_cksum;
3852 struct mach_o_prebind_cksum_command_external raw;
3853
3854 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3855 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3856 return FALSE;
3857
3858 cmd->cksum = bfd_get_32 (abfd, raw.cksum);
3859 return TRUE;
3860 }
3861
3862 static bfd_boolean
3863 bfd_mach_o_read_twolevel_hints (bfd *abfd,
3864 bfd_mach_o_load_command *command)
3865 {
3866 bfd_mach_o_twolevel_hints_command *cmd = &command->command.twolevel_hints;
3867 struct mach_o_twolevel_hints_command_external raw;
3868
3869 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3870 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3871 return FALSE;
3872
3873 cmd->offset = bfd_get_32 (abfd, raw.offset);
3874 cmd->nhints = bfd_get_32 (abfd, raw.nhints);
3875 return TRUE;
3876 }
3877
3878 static bfd_boolean
3879 bfd_mach_o_read_fvmlib (bfd *abfd, bfd_mach_o_load_command *command)
3880 {
3881 bfd_mach_o_fvmlib_command *fvm = &command->command.fvmlib;
3882 struct mach_o_fvmlib_command_external raw;
3883 unsigned int nameoff;
3884 unsigned int namelen;
3885
3886 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3887 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3888 return FALSE;
3889
3890 nameoff = bfd_h_get_32 (abfd, raw.name);
3891 fvm->minor_version = bfd_h_get_32 (abfd, raw.minor_version);
3892 fvm->header_addr = bfd_h_get_32 (abfd, raw.header_addr);
3893
3894 fvm->name_offset = command->offset + nameoff;
3895 namelen = command->len - nameoff;
3896 fvm->name_str = bfd_alloc (abfd, namelen);
3897 if (fvm->name_str == NULL)
3898 return FALSE;
3899 if (bfd_seek (abfd, fvm->name_offset, SEEK_SET) != 0
3900 || bfd_bread (fvm->name_str, namelen, abfd) != namelen)
3901 return FALSE;
3902 return TRUE;
3903 }
3904
3905 static bfd_boolean
3906 bfd_mach_o_read_thread (bfd *abfd, bfd_mach_o_load_command *command)
3907 {
3908 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3909 bfd_mach_o_thread_command *cmd = &command->command.thread;
3910 unsigned int offset;
3911 unsigned int nflavours;
3912 unsigned int i;
3913
3914 BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD)
3915 || (command->type == BFD_MACH_O_LC_UNIXTHREAD));
3916
3917 /* Count the number of threads. */
3918 offset = 8;
3919 nflavours = 0;
3920 while (offset != command->len)
3921 {
3922 struct mach_o_thread_command_external raw;
3923
3924 if (offset >= command->len)
3925 return FALSE;
3926
3927 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
3928 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3929 return FALSE;
3930
3931 offset += sizeof (raw) + bfd_h_get_32 (abfd, raw.count) * 4;
3932 nflavours++;
3933 }
3934
3935 /* Allocate threads. */
3936 cmd->flavours = bfd_alloc
3937 (abfd, nflavours * sizeof (bfd_mach_o_thread_flavour));
3938 if (cmd->flavours == NULL)
3939 return FALSE;
3940 cmd->nflavours = nflavours;
3941
3942 offset = 8;
3943 nflavours = 0;
3944 while (offset != command->len)
3945 {
3946 struct mach_o_thread_command_external raw;
3947
3948 if (offset >= command->len)
3949 return FALSE;
3950
3951 if (nflavours >= cmd->nflavours)
3952 return FALSE;
3953
3954 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
3955 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3956 return FALSE;
3957
3958 cmd->flavours[nflavours].flavour = bfd_h_get_32 (abfd, raw.flavour);
3959 cmd->flavours[nflavours].offset = command->offset + offset + sizeof (raw);
3960 cmd->flavours[nflavours].size = bfd_h_get_32 (abfd, raw.count) * 4;
3961 offset += cmd->flavours[nflavours].size + sizeof (raw);
3962 nflavours++;
3963 }
3964
3965 for (i = 0; i < nflavours; i++)
3966 {
3967 asection *bfdsec;
3968 unsigned int snamelen;
3969 char *sname;
3970 const char *flavourstr;
3971 const char *prefix = "LC_THREAD";
3972 unsigned int j = 0;
3973
3974 switch (mdata->header.cputype)
3975 {
3976 case BFD_MACH_O_CPU_TYPE_POWERPC:
3977 case BFD_MACH_O_CPU_TYPE_POWERPC_64:
3978 flavourstr =
3979 bfd_mach_o_ppc_flavour_string (cmd->flavours[i].flavour);
3980 break;
3981 case BFD_MACH_O_CPU_TYPE_I386:
3982 case BFD_MACH_O_CPU_TYPE_X86_64:
3983 flavourstr =
3984 bfd_mach_o_i386_flavour_string (cmd->flavours[i].flavour);
3985 break;
3986 default:
3987 flavourstr = "UNKNOWN_ARCHITECTURE";
3988 break;
3989 }
3990
3991 snamelen = strlen (prefix) + 1 + 20 + 1 + strlen (flavourstr) + 1;
3992 sname = bfd_alloc (abfd, snamelen);
3993 if (sname == NULL)
3994 return FALSE;
3995
3996 for (;;)
3997 {
3998 sprintf (sname, "%s.%s.%u", prefix, flavourstr, j);
3999 if (bfd_get_section_by_name (abfd, sname) == NULL)
4000 break;
4001 j++;
4002 }
4003
4004 bfdsec = bfd_make_section_with_flags (abfd, sname, SEC_HAS_CONTENTS);
4005
4006 bfdsec->vma = 0;
4007 bfdsec->lma = 0;
4008 bfdsec->size = cmd->flavours[i].size;
4009 bfdsec->filepos = cmd->flavours[i].offset;
4010 bfdsec->alignment_power = 0x0;
4011
4012 cmd->section = bfdsec;
4013 }
4014
4015 return TRUE;
4016 }
4017
4018 static bfd_boolean
4019 bfd_mach_o_read_dysymtab (bfd *abfd, bfd_mach_o_load_command *command)
4020 {
4021 bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab;
4022 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4023
4024 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB);
4025
4026 {
4027 struct mach_o_dysymtab_command_external raw;
4028
4029 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4030 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4031 return FALSE;
4032
4033 cmd->ilocalsym = bfd_h_get_32 (abfd, raw.ilocalsym);
4034 cmd->nlocalsym = bfd_h_get_32 (abfd, raw.nlocalsym);
4035 cmd->iextdefsym = bfd_h_get_32 (abfd, raw.iextdefsym);
4036 cmd->nextdefsym = bfd_h_get_32 (abfd, raw.nextdefsym);
4037 cmd->iundefsym = bfd_h_get_32 (abfd, raw.iundefsym);
4038 cmd->nundefsym = bfd_h_get_32 (abfd, raw.nundefsym);
4039 cmd->tocoff = bfd_h_get_32 (abfd, raw.tocoff);
4040 cmd->ntoc = bfd_h_get_32 (abfd, raw.ntoc);
4041 cmd->modtaboff = bfd_h_get_32 (abfd, raw.modtaboff);
4042 cmd->nmodtab = bfd_h_get_32 (abfd, raw.nmodtab);
4043 cmd->extrefsymoff = bfd_h_get_32 (abfd, raw.extrefsymoff);
4044 cmd->nextrefsyms = bfd_h_get_32 (abfd, raw.nextrefsyms);
4045 cmd->indirectsymoff = bfd_h_get_32 (abfd, raw.indirectsymoff);
4046 cmd->nindirectsyms = bfd_h_get_32 (abfd, raw.nindirectsyms);
4047 cmd->extreloff = bfd_h_get_32 (abfd, raw.extreloff);
4048 cmd->nextrel = bfd_h_get_32 (abfd, raw.nextrel);
4049 cmd->locreloff = bfd_h_get_32 (abfd, raw.locreloff);
4050 cmd->nlocrel = bfd_h_get_32 (abfd, raw.nlocrel);
4051 }
4052
4053 if (cmd->nmodtab != 0)
4054 {
4055 unsigned int i;
4056 int wide = bfd_mach_o_wide_p (abfd);
4057 unsigned int module_len = wide ? 56 : 52;
4058
4059 cmd->dylib_module =
4060 bfd_alloc (abfd, cmd->nmodtab * sizeof (bfd_mach_o_dylib_module));
4061 if (cmd->dylib_module == NULL)
4062 return FALSE;
4063
4064 if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0)
4065 return FALSE;
4066
4067 for (i = 0; i < cmd->nmodtab; i++)
4068 {
4069 bfd_mach_o_dylib_module *module = &cmd->dylib_module[i];
4070 unsigned long v;
4071 unsigned char buf[56];
4072
4073 if (bfd_bread ((void *) buf, module_len, abfd) != module_len)
4074 return FALSE;
4075
4076 module->module_name_idx = bfd_h_get_32 (abfd, buf + 0);
4077 module->iextdefsym = bfd_h_get_32 (abfd, buf + 4);
4078 module->nextdefsym = bfd_h_get_32 (abfd, buf + 8);
4079 module->irefsym = bfd_h_get_32 (abfd, buf + 12);
4080 module->nrefsym = bfd_h_get_32 (abfd, buf + 16);
4081 module->ilocalsym = bfd_h_get_32 (abfd, buf + 20);
4082 module->nlocalsym = bfd_h_get_32 (abfd, buf + 24);
4083 module->iextrel = bfd_h_get_32 (abfd, buf + 28);
4084 module->nextrel = bfd_h_get_32 (abfd, buf + 32);
4085 v = bfd_h_get_32 (abfd, buf +36);
4086 module->iinit = v & 0xffff;
4087 module->iterm = (v >> 16) & 0xffff;
4088 v = bfd_h_get_32 (abfd, buf + 40);
4089 module->ninit = v & 0xffff;
4090 module->nterm = (v >> 16) & 0xffff;
4091 if (wide)
4092 {
4093 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 44);
4094 module->objc_module_info_addr = bfd_h_get_64 (abfd, buf + 48);
4095 }
4096 else
4097 {
4098 module->objc_module_info_addr = bfd_h_get_32 (abfd, buf + 44);
4099 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 48);
4100 }
4101 }
4102 }
4103
4104 if (cmd->ntoc != 0)
4105 {
4106 unsigned int i;
4107
4108 cmd->dylib_toc = bfd_alloc
4109 (abfd, cmd->ntoc * sizeof (bfd_mach_o_dylib_table_of_content));
4110 if (cmd->dylib_toc == NULL)
4111 return FALSE;
4112
4113 if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0)
4114 return FALSE;
4115
4116 for (i = 0; i < cmd->ntoc; i++)
4117 {
4118 struct mach_o_dylib_table_of_contents_external raw;
4119 bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i];
4120
4121 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4122 return FALSE;
4123
4124 toc->symbol_index = bfd_h_get_32 (abfd, raw.symbol_index);
4125 toc->module_index = bfd_h_get_32 (abfd, raw.module_index);
4126 }
4127 }
4128
4129 if (cmd->nindirectsyms != 0)
4130 {
4131 unsigned int i;
4132
4133 cmd->indirect_syms = bfd_alloc
4134 (abfd, cmd->nindirectsyms * sizeof (unsigned int));
4135 if (cmd->indirect_syms == NULL)
4136 return FALSE;
4137
4138 if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0)
4139 return FALSE;
4140
4141 for (i = 0; i < cmd->nindirectsyms; i++)
4142 {
4143 unsigned char raw[4];
4144 unsigned int *is = &cmd->indirect_syms[i];
4145
4146 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw))
4147 return FALSE;
4148
4149 *is = bfd_h_get_32 (abfd, raw);
4150 }
4151 }
4152
4153 if (cmd->nextrefsyms != 0)
4154 {
4155 unsigned long v;
4156 unsigned int i;
4157
4158 cmd->ext_refs = bfd_alloc
4159 (abfd, cmd->nextrefsyms * sizeof (bfd_mach_o_dylib_reference));
4160 if (cmd->ext_refs == NULL)
4161 return FALSE;
4162
4163 if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0)
4164 return FALSE;
4165
4166 for (i = 0; i < cmd->nextrefsyms; i++)
4167 {
4168 unsigned char raw[4];
4169 bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i];
4170
4171 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw))
4172 return FALSE;
4173
4174 /* Fields isym and flags are written as bit-fields, thus we need
4175 a specific processing for endianness. */
4176 v = bfd_h_get_32 (abfd, raw);
4177 if (bfd_big_endian (abfd))
4178 {
4179 ref->isym = (v >> 8) & 0xffffff;
4180 ref->flags = v & 0xff;
4181 }
4182 else
4183 {
4184 ref->isym = v & 0xffffff;
4185 ref->flags = (v >> 24) & 0xff;
4186 }
4187 }
4188 }
4189
4190 if (mdata->dysymtab)
4191 return FALSE;
4192 mdata->dysymtab = cmd;
4193
4194 return TRUE;
4195 }
4196
4197 static bfd_boolean
4198 bfd_mach_o_read_symtab (bfd *abfd, bfd_mach_o_load_command *command)
4199 {
4200 bfd_mach_o_symtab_command *symtab = &command->command.symtab;
4201 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4202 struct mach_o_symtab_command_external raw;
4203
4204 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB);
4205
4206 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4207 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4208 return FALSE;
4209
4210 symtab->symoff = bfd_h_get_32 (abfd, raw.symoff);
4211 symtab->nsyms = bfd_h_get_32 (abfd, raw.nsyms);
4212 symtab->stroff = bfd_h_get_32 (abfd, raw.stroff);
4213 symtab->strsize = bfd_h_get_32 (abfd, raw.strsize);
4214 symtab->symbols = NULL;
4215 symtab->strtab = NULL;
4216
4217 if (symtab->nsyms != 0)
4218 abfd->flags |= HAS_SYMS;
4219
4220 if (mdata->symtab)
4221 return FALSE;
4222 mdata->symtab = symtab;
4223 return TRUE;
4224 }
4225
4226 static bfd_boolean
4227 bfd_mach_o_read_uuid (bfd *abfd, bfd_mach_o_load_command *command)
4228 {
4229 bfd_mach_o_uuid_command *cmd = &command->command.uuid;
4230
4231 BFD_ASSERT (command->type == BFD_MACH_O_LC_UUID);
4232
4233 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4234 || bfd_bread (cmd->uuid, 16, abfd) != 16)
4235 return FALSE;
4236
4237 return TRUE;
4238 }
4239
4240 static bfd_boolean
4241 bfd_mach_o_read_linkedit (bfd *abfd, bfd_mach_o_load_command *command)
4242 {
4243 bfd_mach_o_linkedit_command *cmd = &command->command.linkedit;
4244 struct mach_o_linkedit_data_command_external raw;
4245
4246 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4247 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4248 return FALSE;
4249
4250 cmd->dataoff = bfd_get_32 (abfd, raw.dataoff);
4251 cmd->datasize = bfd_get_32 (abfd, raw.datasize);
4252 return TRUE;
4253 }
4254
4255 static bfd_boolean
4256 bfd_mach_o_read_str (bfd *abfd, bfd_mach_o_load_command *command)
4257 {
4258 bfd_mach_o_str_command *cmd = &command->command.str;
4259 struct mach_o_str_command_external raw;
4260 unsigned long off;
4261
4262 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4263 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4264 return FALSE;
4265
4266 off = bfd_get_32 (abfd, raw.str);
4267 cmd->stroff = command->offset + off;
4268 cmd->str_len = command->len - off;
4269 cmd->str = bfd_alloc (abfd, cmd->str_len);
4270 if (cmd->str == NULL)
4271 return FALSE;
4272 if (bfd_seek (abfd, cmd->stroff, SEEK_SET) != 0
4273 || bfd_bread ((void *) cmd->str, cmd->str_len, abfd) != cmd->str_len)
4274 return FALSE;
4275 return TRUE;
4276 }
4277
4278 static unsigned char *
4279 bfd_mach_o_alloc_and_read (bfd *abfd, unsigned int off, unsigned int size)
4280 {
4281 unsigned char *buf;
4282
4283 buf = bfd_alloc (abfd, size);
4284 if (buf == NULL)
4285 return NULL;
4286 if (bfd_seek (abfd, off, SEEK_SET) != 0
4287 || bfd_bread (buf, size, abfd) != size)
4288 return NULL;
4289 return buf;
4290 }
4291
4292 static bfd_boolean
4293 bfd_mach_o_read_dyld_content (bfd *abfd, bfd_mach_o_dyld_info_command *cmd)
4294 {
4295 /* Read rebase content. */
4296 if (cmd->rebase_content == NULL && cmd->rebase_size != 0)
4297 {
4298 cmd->rebase_content =
4299 bfd_mach_o_alloc_and_read (abfd, cmd->rebase_off, cmd->rebase_size);
4300 if (cmd->rebase_content == NULL)
4301 return FALSE;
4302 }
4303
4304 /* Read bind content. */
4305 if (cmd->bind_content == NULL && cmd->bind_size != 0)
4306 {
4307 cmd->bind_content =
4308 bfd_mach_o_alloc_and_read (abfd, cmd->bind_off, cmd->bind_size);
4309 if (cmd->bind_content == NULL)
4310 return FALSE;
4311 }
4312
4313 /* Read weak bind content. */
4314 if (cmd->weak_bind_content == NULL && cmd->weak_bind_size != 0)
4315 {
4316 cmd->weak_bind_content = bfd_mach_o_alloc_and_read
4317 (abfd, cmd->weak_bind_off, cmd->weak_bind_size);
4318 if (cmd->weak_bind_content == NULL)
4319 return FALSE;
4320 }
4321
4322 /* Read lazy bind content. */
4323 if (cmd->lazy_bind_content == NULL && cmd->lazy_bind_size != 0)
4324 {
4325 cmd->lazy_bind_content = bfd_mach_o_alloc_and_read
4326 (abfd, cmd->lazy_bind_off, cmd->lazy_bind_size);
4327 if (cmd->lazy_bind_content == NULL)
4328 return FALSE;
4329 }
4330
4331 /* Read export content. */
4332 if (cmd->export_content == NULL && cmd->export_size != 0)
4333 {
4334 cmd->export_content = bfd_mach_o_alloc_and_read
4335 (abfd, cmd->export_off, cmd->export_size);
4336 if (cmd->export_content == NULL)
4337 return FALSE;
4338 }
4339
4340 return TRUE;
4341 }
4342
4343 static bfd_boolean
4344 bfd_mach_o_read_dyld_info (bfd *abfd, bfd_mach_o_load_command *command)
4345 {
4346 bfd_mach_o_dyld_info_command *cmd = &command->command.dyld_info;
4347 struct mach_o_dyld_info_command_external raw;
4348
4349 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4350 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4351 return FALSE;
4352
4353 cmd->rebase_off = bfd_get_32 (abfd, raw.rebase_off);
4354 cmd->rebase_size = bfd_get_32 (abfd, raw.rebase_size);
4355 cmd->rebase_content = NULL;
4356 cmd->bind_off = bfd_get_32 (abfd, raw.bind_off);
4357 cmd->bind_size = bfd_get_32 (abfd, raw.bind_size);
4358 cmd->bind_content = NULL;
4359 cmd->weak_bind_off = bfd_get_32 (abfd, raw.weak_bind_off);
4360 cmd->weak_bind_size = bfd_get_32 (abfd, raw.weak_bind_size);
4361 cmd->weak_bind_content = NULL;
4362 cmd->lazy_bind_off = bfd_get_32 (abfd, raw.lazy_bind_off);
4363 cmd->lazy_bind_size = bfd_get_32 (abfd, raw.lazy_bind_size);
4364 cmd->lazy_bind_content = NULL;
4365 cmd->export_off = bfd_get_32 (abfd, raw.export_off);
4366 cmd->export_size = bfd_get_32 (abfd, raw.export_size);
4367 cmd->export_content = NULL;
4368 return TRUE;
4369 }
4370
4371 static bfd_boolean
4372 bfd_mach_o_read_version_min (bfd *abfd, bfd_mach_o_load_command *command)
4373 {
4374 bfd_mach_o_version_min_command *cmd = &command->command.version_min;
4375 struct mach_o_version_min_command_external raw;
4376 unsigned int ver;
4377
4378 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4379 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4380 return FALSE;
4381
4382 ver = bfd_get_32 (abfd, raw.version);
4383 cmd->rel = ver >> 16;
4384 cmd->maj = ver >> 8;
4385 cmd->min = ver;
4386 cmd->reserved = bfd_get_32 (abfd, raw.reserved);
4387 return TRUE;
4388 }
4389
4390 static bfd_boolean
4391 bfd_mach_o_read_encryption_info (bfd *abfd, bfd_mach_o_load_command *command)
4392 {
4393 bfd_mach_o_encryption_info_command *cmd = &command->command.encryption_info;
4394 struct mach_o_encryption_info_command_external raw;
4395
4396 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4397 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4398 return FALSE;
4399
4400 cmd->cryptoff = bfd_get_32 (abfd, raw.cryptoff);
4401 cmd->cryptsize = bfd_get_32 (abfd, raw.cryptsize);
4402 cmd->cryptid = bfd_get_32 (abfd, raw.cryptid);
4403 return TRUE;
4404 }
4405
4406 static bfd_boolean
4407 bfd_mach_o_read_main (bfd *abfd, bfd_mach_o_load_command *command)
4408 {
4409 bfd_mach_o_main_command *cmd = &command->command.main;
4410 struct mach_o_entry_point_command_external raw;
4411
4412 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4413 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4414 return FALSE;
4415
4416 cmd->entryoff = bfd_get_64 (abfd, raw.entryoff);
4417 cmd->stacksize = bfd_get_64 (abfd, raw.stacksize);
4418 return TRUE;
4419 }
4420
4421 static bfd_boolean
4422 bfd_mach_o_read_source_version (bfd *abfd, bfd_mach_o_load_command *command)
4423 {
4424 bfd_mach_o_source_version_command *cmd = &command->command.source_version;
4425 struct mach_o_source_version_command_external raw;
4426 bfd_uint64_t ver;
4427
4428 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4429 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4430 return FALSE;
4431
4432 ver = bfd_get_64 (abfd, raw.version);
4433 /* Note: we use a serie of shift to avoid shift > 32 (for which gcc
4434 generates warnings) in case of the host doesn't support 64 bit
4435 integers. */
4436 cmd->e = ver & 0x3ff;
4437 ver >>= 10;
4438 cmd->d = ver & 0x3ff;
4439 ver >>= 10;
4440 cmd->c = ver & 0x3ff;
4441 ver >>= 10;
4442 cmd->b = ver & 0x3ff;
4443 ver >>= 10;
4444 cmd->a = ver & 0xffffff;
4445 return TRUE;
4446 }
4447
4448 static bfd_boolean
4449 bfd_mach_o_read_segment (bfd *abfd,
4450 bfd_mach_o_load_command *command,
4451 unsigned int wide)
4452 {
4453 bfd_mach_o_segment_command *seg = &command->command.segment;
4454 unsigned long i;
4455
4456 if (wide)
4457 {
4458 struct mach_o_segment_command_64_external raw;
4459
4460 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64);
4461
4462 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4463 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4464 return FALSE;
4465
4466 memcpy (seg->segname, raw.segname, 16);
4467 seg->segname[16] = '\0';
4468
4469 seg->vmaddr = bfd_h_get_64 (abfd, raw.vmaddr);
4470 seg->vmsize = bfd_h_get_64 (abfd, raw.vmsize);
4471 seg->fileoff = bfd_h_get_64 (abfd, raw.fileoff);
4472 seg->filesize = bfd_h_get_64 (abfd, raw.filesize);
4473 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot);
4474 seg->initprot = bfd_h_get_32 (abfd, raw.initprot);
4475 seg->nsects = bfd_h_get_32 (abfd, raw.nsects);
4476 seg->flags = bfd_h_get_32 (abfd, raw.flags);
4477 }
4478 else
4479 {
4480 struct mach_o_segment_command_32_external raw;
4481
4482 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT);
4483
4484 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4485 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4486 return FALSE;
4487
4488 memcpy (seg->segname, raw.segname, 16);
4489 seg->segname[16] = '\0';
4490
4491 seg->vmaddr = bfd_h_get_32 (abfd, raw.vmaddr);
4492 seg->vmsize = bfd_h_get_32 (abfd, raw.vmsize);
4493 seg->fileoff = bfd_h_get_32 (abfd, raw.fileoff);
4494 seg->filesize = bfd_h_get_32 (abfd, raw.filesize);
4495 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot);
4496 seg->initprot = bfd_h_get_32 (abfd, raw.initprot);
4497 seg->nsects = bfd_h_get_32 (abfd, raw.nsects);
4498 seg->flags = bfd_h_get_32 (abfd, raw.flags);
4499 }
4500 seg->sect_head = NULL;
4501 seg->sect_tail = NULL;
4502
4503 for (i = 0; i < seg->nsects; i++)
4504 {
4505 bfd_vma segoff;
4506 asection *sec;
4507
4508 if (wide)
4509 segoff = command->offset + BFD_MACH_O_LC_SEGMENT_64_SIZE
4510 + (i * BFD_MACH_O_SECTION_64_SIZE);
4511 else
4512 segoff = command->offset + BFD_MACH_O_LC_SEGMENT_SIZE
4513 + (i * BFD_MACH_O_SECTION_SIZE);
4514
4515 sec = bfd_mach_o_read_section (abfd, segoff, seg->initprot, wide);
4516 if (sec == NULL)
4517 return FALSE;
4518
4519 bfd_mach_o_append_section_to_segment
4520 (seg, bfd_mach_o_get_mach_o_section (sec));
4521 }
4522
4523 return TRUE;
4524 }
4525
4526 static bfd_boolean
4527 bfd_mach_o_read_segment_32 (bfd *abfd, bfd_mach_o_load_command *command)
4528 {
4529 return bfd_mach_o_read_segment (abfd, command, 0);
4530 }
4531
4532 static bfd_boolean
4533 bfd_mach_o_read_segment_64 (bfd *abfd, bfd_mach_o_load_command *command)
4534 {
4535 return bfd_mach_o_read_segment (abfd, command, 1);
4536 }
4537
4538 static bfd_boolean
4539 bfd_mach_o_read_command (bfd *abfd, bfd_mach_o_load_command *command)
4540 {
4541 struct mach_o_load_command_external raw;
4542 unsigned int cmd;
4543
4544 /* Read command type and length. */
4545 if (bfd_seek (abfd, command->offset, SEEK_SET) != 0
4546 || bfd_bread (&raw, BFD_MACH_O_LC_SIZE, abfd) != BFD_MACH_O_LC_SIZE)
4547 return FALSE;
4548
4549 cmd = bfd_h_get_32 (abfd, raw.cmd);
4550 command->type = cmd & ~BFD_MACH_O_LC_REQ_DYLD;
4551 command->type_required = cmd & BFD_MACH_O_LC_REQ_DYLD ? TRUE : FALSE;
4552 command->len = bfd_h_get_32 (abfd, raw.cmdsize);
4553
4554 switch (command->type)
4555 {
4556 case BFD_MACH_O_LC_SEGMENT:
4557 if (!bfd_mach_o_read_segment_32 (abfd, command))
4558 return FALSE;
4559 break;
4560 case BFD_MACH_O_LC_SEGMENT_64:
4561 if (!bfd_mach_o_read_segment_64 (abfd, command))
4562 return FALSE;
4563 break;
4564 case BFD_MACH_O_LC_SYMTAB:
4565 if (!bfd_mach_o_read_symtab (abfd, command))
4566 return FALSE;
4567 break;
4568 case BFD_MACH_O_LC_SYMSEG:
4569 break;
4570 case BFD_MACH_O_LC_THREAD:
4571 case BFD_MACH_O_LC_UNIXTHREAD:
4572 if (!bfd_mach_o_read_thread (abfd, command))
4573 return FALSE;
4574 break;
4575 case BFD_MACH_O_LC_LOAD_DYLINKER:
4576 case BFD_MACH_O_LC_ID_DYLINKER:
4577 case BFD_MACH_O_LC_DYLD_ENVIRONMENT:
4578 if (!bfd_mach_o_read_dylinker (abfd, command))
4579 return FALSE;
4580 break;
4581 case BFD_MACH_O_LC_LOAD_DYLIB:
4582 case BFD_MACH_O_LC_LAZY_LOAD_DYLIB:
4583 case BFD_MACH_O_LC_ID_DYLIB:
4584 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
4585 case BFD_MACH_O_LC_REEXPORT_DYLIB:
4586 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
4587 if (!bfd_mach_o_read_dylib (abfd, command))
4588 return FALSE;
4589 break;
4590 case BFD_MACH_O_LC_PREBOUND_DYLIB:
4591 if (!bfd_mach_o_read_prebound_dylib (abfd, command))
4592 return FALSE;
4593 break;
4594 case BFD_MACH_O_LC_LOADFVMLIB:
4595 case BFD_MACH_O_LC_IDFVMLIB:
4596 if (!bfd_mach_o_read_fvmlib (abfd, command))
4597 return FALSE;
4598 break;
4599 case BFD_MACH_O_LC_IDENT:
4600 case BFD_MACH_O_LC_FVMFILE:
4601 case BFD_MACH_O_LC_PREPAGE:
4602 case BFD_MACH_O_LC_ROUTINES:
4603 case BFD_MACH_O_LC_ROUTINES_64:
4604 break;
4605 case BFD_MACH_O_LC_SUB_FRAMEWORK:
4606 case BFD_MACH_O_LC_SUB_UMBRELLA:
4607 case BFD_MACH_O_LC_SUB_LIBRARY:
4608 case BFD_MACH_O_LC_SUB_CLIENT:
4609 case BFD_MACH_O_LC_RPATH:
4610 if (!bfd_mach_o_read_str (abfd, command))
4611 return FALSE;
4612 break;
4613 case BFD_MACH_O_LC_DYSYMTAB:
4614 if (!bfd_mach_o_read_dysymtab (abfd, command))
4615 return FALSE;
4616 break;
4617 case BFD_MACH_O_LC_PREBIND_CKSUM:
4618 if (!bfd_mach_o_read_prebind_cksum (abfd, command))
4619 return FALSE;
4620 break;
4621 case BFD_MACH_O_LC_TWOLEVEL_HINTS:
4622 if (!bfd_mach_o_read_twolevel_hints (abfd, command))
4623 return FALSE;
4624 break;
4625 case BFD_MACH_O_LC_UUID:
4626 if (!bfd_mach_o_read_uuid (abfd, command))
4627 return FALSE;
4628 break;
4629 case BFD_MACH_O_LC_CODE_SIGNATURE:
4630 case BFD_MACH_O_LC_SEGMENT_SPLIT_INFO:
4631 case BFD_MACH_O_LC_FUNCTION_STARTS:
4632 case BFD_MACH_O_LC_DATA_IN_CODE:
4633 case BFD_MACH_O_LC_DYLIB_CODE_SIGN_DRS:
4634 if (!bfd_mach_o_read_linkedit (abfd, command))
4635 return FALSE;
4636 break;
4637 case BFD_MACH_O_LC_ENCRYPTION_INFO:
4638 if (!bfd_mach_o_read_encryption_info (abfd, command))
4639 return FALSE;
4640 break;
4641 case BFD_MACH_O_LC_DYLD_INFO:
4642 if (!bfd_mach_o_read_dyld_info (abfd, command))
4643 return FALSE;
4644 break;
4645 case BFD_MACH_O_LC_VERSION_MIN_MACOSX:
4646 case BFD_MACH_O_LC_VERSION_MIN_IPHONEOS:
4647 if (!bfd_mach_o_read_version_min (abfd, command))
4648 return FALSE;
4649 break;
4650 case BFD_MACH_O_LC_MAIN:
4651 if (!bfd_mach_o_read_main (abfd, command))
4652 return FALSE;
4653 break;
4654 case BFD_MACH_O_LC_SOURCE_VERSION:
4655 if (!bfd_mach_o_read_source_version (abfd, command))
4656 return FALSE;
4657 break;
4658 default:
4659 (*_bfd_error_handler)(_("%B: unknown load command 0x%lx"),
4660 abfd, (unsigned long) command->type);
4661 break;
4662 }
4663
4664 return TRUE;
4665 }
4666
4667 static void
4668 bfd_mach_o_flatten_sections (bfd *abfd)
4669 {
4670 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4671 bfd_mach_o_load_command *cmd;
4672 long csect = 0;
4673
4674 /* Count total number of sections. */
4675 mdata->nsects = 0;
4676
4677 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
4678 {
4679 if (cmd->type == BFD_MACH_O_LC_SEGMENT
4680 || cmd->type == BFD_MACH_O_LC_SEGMENT_64)
4681 {
4682 bfd_mach_o_segment_command *seg = &cmd->command.segment;
4683
4684 mdata->nsects += seg->nsects;
4685 }
4686 }
4687
4688 /* Allocate sections array. */
4689 mdata->sections = bfd_alloc (abfd,
4690 mdata->nsects * sizeof (bfd_mach_o_section *));
4691
4692 /* Fill the array. */
4693 csect = 0;
4694
4695 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
4696 {
4697 if (cmd->type == BFD_MACH_O_LC_SEGMENT
4698 || cmd->type == BFD_MACH_O_LC_SEGMENT_64)
4699 {
4700 bfd_mach_o_segment_command *seg = &cmd->command.segment;
4701 bfd_mach_o_section *sec;
4702
4703 BFD_ASSERT (csect + seg->nsects <= mdata->nsects);
4704
4705 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
4706 mdata->sections[csect++] = sec;
4707 }
4708 }
4709 }
4710
4711 static bfd_boolean
4712 bfd_mach_o_scan_start_address (bfd *abfd)
4713 {
4714 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4715 bfd_mach_o_thread_command *thr = NULL;
4716 bfd_mach_o_load_command *cmd;
4717 unsigned long i;
4718
4719 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
4720 if (cmd->type == BFD_MACH_O_LC_THREAD
4721 || cmd->type == BFD_MACH_O_LC_UNIXTHREAD)
4722 {
4723 thr = &cmd->command.thread;
4724 break;
4725 }
4726 else if (cmd->type == BFD_MACH_O_LC_MAIN && mdata->nsects > 1)
4727 {
4728 bfd_mach_o_main_command *main_cmd = &cmd->command.main;
4729 bfd_mach_o_section *text_sect = mdata->sections[0];
4730
4731 if (text_sect)
4732 {
4733 abfd->start_address = main_cmd->entryoff
4734 + (text_sect->addr - text_sect->offset);
4735 return TRUE;
4736 }
4737 }
4738
4739 /* An object file has no start address, so do not fail if not found. */
4740 if (thr == NULL)
4741 return TRUE;
4742
4743 /* FIXME: create a subtarget hook ? */
4744 for (i = 0; i < thr->nflavours; i++)
4745 {
4746 if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_I386)
4747 && (thr->flavours[i].flavour == BFD_MACH_O_x86_THREAD_STATE32))
4748 {
4749 unsigned char buf[4];
4750
4751 if (bfd_seek (abfd, thr->flavours[i].offset + 40, SEEK_SET) != 0
4752 || bfd_bread (buf, 4, abfd) != 4)
4753 return FALSE;
4754
4755 abfd->start_address = bfd_h_get_32 (abfd, buf);
4756 }
4757 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC)
4758 && (thr->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE))
4759 {
4760 unsigned char buf[4];
4761
4762 if (bfd_seek (abfd, thr->flavours[i].offset + 0, SEEK_SET) != 0
4763 || bfd_bread (buf, 4, abfd) != 4)
4764 return FALSE;
4765
4766 abfd->start_address = bfd_h_get_32 (abfd, buf);
4767 }
4768 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC_64)
4769 && (thr->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE64))
4770 {
4771 unsigned char buf[8];
4772
4773 if (bfd_seek (abfd, thr->flavours[i].offset + 0, SEEK_SET) != 0
4774 || bfd_bread (buf, 8, abfd) != 8)
4775 return FALSE;
4776
4777 abfd->start_address = bfd_h_get_64 (abfd, buf);
4778 }
4779 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_X86_64)
4780 && (thr->flavours[i].flavour == BFD_MACH_O_x86_THREAD_STATE64))
4781 {
4782 unsigned char buf[8];
4783
4784 if (bfd_seek (abfd, thr->flavours[i].offset + (16 * 8), SEEK_SET) != 0
4785 || bfd_bread (buf, 8, abfd) != 8)
4786 return FALSE;
4787
4788 abfd->start_address = bfd_h_get_64 (abfd, buf);
4789 }
4790 }
4791
4792 return TRUE;
4793 }
4794
4795 bfd_boolean
4796 bfd_mach_o_set_arch_mach (bfd *abfd,
4797 enum bfd_architecture arch,
4798 unsigned long machine)
4799 {
4800 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
4801
4802 /* If this isn't the right architecture for this backend, and this
4803 isn't the generic backend, fail. */
4804 if (arch != bed->arch
4805 && arch != bfd_arch_unknown
4806 && bed->arch != bfd_arch_unknown)
4807 return FALSE;
4808
4809 return bfd_default_set_arch_mach (abfd, arch, machine);
4810 }
4811
4812 static bfd_boolean
4813 bfd_mach_o_scan (bfd *abfd,
4814 bfd_mach_o_header *header,
4815 bfd_mach_o_data_struct *mdata)
4816 {
4817 unsigned int i;
4818 enum bfd_architecture cputype;
4819 unsigned long cpusubtype;
4820 unsigned int hdrsize;
4821
4822 hdrsize = mach_o_wide_p (header) ?
4823 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
4824
4825 mdata->header = *header;
4826
4827 abfd->flags = abfd->flags & BFD_IN_MEMORY;
4828 switch (header->filetype)
4829 {
4830 case BFD_MACH_O_MH_OBJECT:
4831 abfd->flags |= HAS_RELOC;
4832 break;
4833 case BFD_MACH_O_MH_EXECUTE:
4834 abfd->flags |= EXEC_P;
4835 break;
4836 case BFD_MACH_O_MH_DYLIB:
4837 case BFD_MACH_O_MH_BUNDLE:
4838 abfd->flags |= DYNAMIC;
4839 break;
4840 }
4841
4842 abfd->tdata.mach_o_data = mdata;
4843
4844 bfd_mach_o_convert_architecture (header->cputype, header->cpusubtype,
4845 &cputype, &cpusubtype);
4846 if (cputype == bfd_arch_unknown)
4847 {
4848 (*_bfd_error_handler)
4849 (_("bfd_mach_o_scan: unknown architecture 0x%lx/0x%lx"),
4850 header->cputype, header->cpusubtype);
4851 return FALSE;
4852 }
4853
4854 bfd_set_arch_mach (abfd, cputype, cpusubtype);
4855
4856 if (header->ncmds != 0)
4857 {
4858 bfd_mach_o_load_command *cmd;
4859
4860 mdata->first_command = NULL;
4861 mdata->last_command = NULL;
4862 cmd = bfd_alloc (abfd, header->ncmds * sizeof (bfd_mach_o_load_command));
4863 if (cmd == NULL)
4864 return FALSE;
4865
4866 for (i = 0; i < header->ncmds; i++)
4867 {
4868 bfd_mach_o_load_command *cur = &cmd[i];
4869
4870 bfd_mach_o_append_command (abfd, cur);
4871
4872 if (i == 0)
4873 cur->offset = hdrsize;
4874 else
4875 {
4876 bfd_mach_o_load_command *prev = &cmd[i - 1];
4877 cur->offset = prev->offset + prev->len;
4878 }
4879
4880 if (!bfd_mach_o_read_command (abfd, cur))
4881 return FALSE;
4882 }
4883 }
4884
4885 /* Sections should be flatten before scanning start address. */
4886 bfd_mach_o_flatten_sections (abfd);
4887 if (!bfd_mach_o_scan_start_address (abfd))
4888 return FALSE;
4889
4890 return TRUE;
4891 }
4892
4893 bfd_boolean
4894 bfd_mach_o_mkobject_init (bfd *abfd)
4895 {
4896 bfd_mach_o_data_struct *mdata = NULL;
4897
4898 mdata = bfd_zalloc (abfd, sizeof (bfd_mach_o_data_struct));
4899 if (mdata == NULL)
4900 return FALSE;
4901 abfd->tdata.mach_o_data = mdata;
4902
4903 mdata->header.magic = 0;
4904 mdata->header.cputype = 0;
4905 mdata->header.cpusubtype = 0;
4906 mdata->header.filetype = 0;
4907 mdata->header.ncmds = 0;
4908 mdata->header.sizeofcmds = 0;
4909 mdata->header.flags = 0;
4910 mdata->header.byteorder = BFD_ENDIAN_UNKNOWN;
4911 mdata->first_command = NULL;
4912 mdata->last_command = NULL;
4913 mdata->nsects = 0;
4914 mdata->sections = NULL;
4915 mdata->dyn_reloc_cache = NULL;
4916
4917 return TRUE;
4918 }
4919
4920 static bfd_boolean
4921 bfd_mach_o_gen_mkobject (bfd *abfd)
4922 {
4923 bfd_mach_o_data_struct *mdata;
4924
4925 if (!bfd_mach_o_mkobject_init (abfd))
4926 return FALSE;
4927
4928 mdata = bfd_mach_o_get_data (abfd);
4929 mdata->header.magic = BFD_MACH_O_MH_MAGIC;
4930 mdata->header.cputype = 0;
4931 mdata->header.cpusubtype = 0;
4932 mdata->header.byteorder = abfd->xvec->byteorder;
4933 mdata->header.version = 1;
4934
4935 return TRUE;
4936 }
4937
4938 const bfd_target *
4939 bfd_mach_o_header_p (bfd *abfd,
4940 bfd_mach_o_filetype filetype,
4941 bfd_mach_o_cpu_type cputype)
4942 {
4943 bfd_mach_o_header header;
4944 bfd_mach_o_data_struct *mdata;
4945
4946 if (!bfd_mach_o_read_header (abfd, &header))
4947 goto wrong;
4948
4949 if (! (header.byteorder == BFD_ENDIAN_BIG
4950 || header.byteorder == BFD_ENDIAN_LITTLE))
4951 {
4952 (*_bfd_error_handler) (_("unknown header byte-order value 0x%lx"),
4953 (unsigned long) header.byteorder);
4954 goto wrong;
4955 }
4956
4957 if (! ((header.byteorder == BFD_ENDIAN_BIG
4958 && abfd->xvec->byteorder == BFD_ENDIAN_BIG
4959 && abfd->xvec->header_byteorder == BFD_ENDIAN_BIG)
4960 || (header.byteorder == BFD_ENDIAN_LITTLE
4961 && abfd->xvec->byteorder == BFD_ENDIAN_LITTLE
4962 && abfd->xvec->header_byteorder == BFD_ENDIAN_LITTLE)))
4963 goto wrong;
4964
4965 /* Check cputype and filetype.
4966 In case of wildcard, do not accept magics that are handled by existing
4967 targets. */
4968 if (cputype)
4969 {
4970 if (header.cputype != cputype)
4971 goto wrong;
4972 }
4973 else
4974 {
4975 #ifndef BFD64
4976 /* Do not recognize 64 architectures if not configured for 64bit targets.
4977 This could happen only for generic targets. */
4978 if (mach_o_wide_p (&header))
4979 goto wrong;
4980 #endif
4981 }
4982
4983 if (filetype)
4984 {
4985 if (header.filetype != filetype)
4986 goto wrong;
4987 }
4988 else
4989 {
4990 switch (header.filetype)
4991 {
4992 case BFD_MACH_O_MH_CORE:
4993 /* Handled by core_p */
4994 goto wrong;
4995 default:
4996 break;
4997 }
4998 }
4999
5000 mdata = (bfd_mach_o_data_struct *) bfd_zalloc (abfd, sizeof (*mdata));
5001 if (mdata == NULL)
5002 goto fail;
5003
5004 if (!bfd_mach_o_scan (abfd, &header, mdata))
5005 goto wrong;
5006
5007 return abfd->xvec;
5008
5009 wrong:
5010 bfd_set_error (bfd_error_wrong_format);
5011
5012 fail:
5013 return NULL;
5014 }
5015
5016 static const bfd_target *
5017 bfd_mach_o_gen_object_p (bfd *abfd)
5018 {
5019 return bfd_mach_o_header_p (abfd, 0, 0);
5020 }
5021
5022 static const bfd_target *
5023 bfd_mach_o_gen_core_p (bfd *abfd)
5024 {
5025 return bfd_mach_o_header_p (abfd, BFD_MACH_O_MH_CORE, 0);
5026 }
5027
5028 /* Return the base address of ABFD, ie the address at which the image is
5029 mapped. The possible initial pagezero is ignored. */
5030
5031 bfd_vma
5032 bfd_mach_o_get_base_address (bfd *abfd)
5033 {
5034 bfd_mach_o_data_struct *mdata;
5035 bfd_mach_o_load_command *cmd;
5036
5037 /* Check for Mach-O. */
5038 if (!bfd_mach_o_valid (abfd))
5039 return 0;
5040 mdata = bfd_mach_o_get_data (abfd);
5041
5042 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5043 {
5044 if ((cmd->type == BFD_MACH_O_LC_SEGMENT
5045 || cmd->type == BFD_MACH_O_LC_SEGMENT_64))
5046 {
5047 struct bfd_mach_o_segment_command *segcmd = &cmd->command.segment;
5048
5049 if (segcmd->initprot != 0)
5050 return segcmd->vmaddr;
5051 }
5052 }
5053 return 0;
5054 }
5055
5056 typedef struct mach_o_fat_archentry
5057 {
5058 unsigned long cputype;
5059 unsigned long cpusubtype;
5060 unsigned long offset;
5061 unsigned long size;
5062 unsigned long align;
5063 } mach_o_fat_archentry;
5064
5065 typedef struct mach_o_fat_data_struct
5066 {
5067 unsigned long magic;
5068 unsigned long nfat_arch;
5069 mach_o_fat_archentry *archentries;
5070 } mach_o_fat_data_struct;
5071
5072 const bfd_target *
5073 bfd_mach_o_archive_p (bfd *abfd)
5074 {
5075 mach_o_fat_data_struct *adata = NULL;
5076 struct mach_o_fat_header_external hdr;
5077 unsigned long i;
5078
5079 if (bfd_seek (abfd, 0, SEEK_SET) != 0
5080 || bfd_bread (&hdr, sizeof (hdr), abfd) != sizeof (hdr))
5081 goto error;
5082
5083 adata = bfd_alloc (abfd, sizeof (mach_o_fat_data_struct));
5084 if (adata == NULL)
5085 goto error;
5086
5087 adata->magic = bfd_getb32 (hdr.magic);
5088 adata->nfat_arch = bfd_getb32 (hdr.nfat_arch);
5089 if (adata->magic != 0xcafebabe)
5090 goto error;
5091 /* Avoid matching Java bytecode files, which have the same magic number.
5092 In the Java bytecode file format this field contains the JVM version,
5093 which starts at 43.0. */
5094 if (adata->nfat_arch > 30)
5095 goto error;
5096
5097 adata->archentries =
5098 bfd_alloc (abfd, adata->nfat_arch * sizeof (mach_o_fat_archentry));
5099 if (adata->archentries == NULL)
5100 goto error;
5101
5102 for (i = 0; i < adata->nfat_arch; i++)
5103 {
5104 struct mach_o_fat_arch_external arch;
5105 if (bfd_bread (&arch, sizeof (arch), abfd) != sizeof (arch))
5106 goto error;
5107 adata->archentries[i].cputype = bfd_getb32 (arch.cputype);
5108 adata->archentries[i].cpusubtype = bfd_getb32 (arch.cpusubtype);
5109 adata->archentries[i].offset = bfd_getb32 (arch.offset);
5110 adata->archentries[i].size = bfd_getb32 (arch.size);
5111 adata->archentries[i].align = bfd_getb32 (arch.align);
5112 }
5113
5114 abfd->tdata.mach_o_fat_data = adata;
5115 return abfd->xvec;
5116
5117 error:
5118 if (adata != NULL)
5119 bfd_release (abfd, adata);
5120 bfd_set_error (bfd_error_wrong_format);
5121 return NULL;
5122 }
5123
5124 /* Set the filename for a fat binary member ABFD, whose bfd architecture is
5125 ARCH_TYPE/ARCH_SUBTYPE and corresponding entry in header is ENTRY.
5126 Set arelt_data and origin fields too. */
5127
5128 static void
5129 bfd_mach_o_fat_member_init (bfd *abfd,
5130 enum bfd_architecture arch_type,
5131 unsigned long arch_subtype,
5132 mach_o_fat_archentry *entry)
5133 {
5134 struct areltdata *areltdata;
5135 /* Create the member filename. Use ARCH_NAME. */
5136 const bfd_arch_info_type *ap = bfd_lookup_arch (arch_type, arch_subtype);
5137
5138 if (ap)
5139 {
5140 /* Use the architecture name if known. */
5141 abfd->filename = xstrdup (ap->printable_name);
5142 }
5143 else
5144 {
5145 /* Forge a uniq id. */
5146 const size_t namelen = 2 + 8 + 1 + 2 + 8 + 1;
5147 char *name = xmalloc (namelen);
5148 snprintf (name, namelen, "0x%lx-0x%lx",
5149 entry->cputype, entry->cpusubtype);
5150 abfd->filename = name;
5151 }
5152
5153 areltdata = bfd_zmalloc (sizeof (struct areltdata));
5154 areltdata->parsed_size = entry->size;
5155 abfd->arelt_data = areltdata;
5156 abfd->iostream = NULL;
5157 abfd->origin = entry->offset;
5158 }
5159
5160 bfd *
5161 bfd_mach_o_openr_next_archived_file (bfd *archive, bfd *prev)
5162 {
5163 mach_o_fat_data_struct *adata;
5164 mach_o_fat_archentry *entry = NULL;
5165 unsigned long i;
5166 bfd *nbfd;
5167 enum bfd_architecture arch_type;
5168 unsigned long arch_subtype;
5169
5170 adata = (mach_o_fat_data_struct *) archive->tdata.mach_o_fat_data;
5171 BFD_ASSERT (adata != NULL);
5172
5173 /* Find index of previous entry. */
5174 if (prev == NULL)
5175 {
5176 /* Start at first one. */
5177 i = 0;
5178 }
5179 else
5180 {
5181 /* Find index of PREV. */
5182 for (i = 0; i < adata->nfat_arch; i++)
5183 {
5184 if (adata->archentries[i].offset == prev->origin)
5185 break;
5186 }
5187
5188 if (i == adata->nfat_arch)
5189 {
5190 /* Not found. */
5191 bfd_set_error (bfd_error_bad_value);
5192 return NULL;
5193 }
5194
5195 /* Get next entry. */
5196 i++;
5197 }
5198
5199 if (i >= adata->nfat_arch)
5200 {
5201 bfd_set_error (bfd_error_no_more_archived_files);
5202 return NULL;
5203 }
5204
5205 entry = &adata->archentries[i];
5206 nbfd = _bfd_new_bfd_contained_in (archive);
5207 if (nbfd == NULL)
5208 return NULL;
5209
5210 bfd_mach_o_convert_architecture (entry->cputype, entry->cpusubtype,
5211 &arch_type, &arch_subtype);
5212
5213 bfd_mach_o_fat_member_init (nbfd, arch_type, arch_subtype, entry);
5214
5215 bfd_set_arch_mach (nbfd, arch_type, arch_subtype);
5216
5217 return nbfd;
5218 }
5219
5220 /* Analogous to stat call. */
5221
5222 static int
5223 bfd_mach_o_fat_stat_arch_elt (bfd *abfd, struct stat *buf)
5224 {
5225 if (abfd->arelt_data == NULL)
5226 {
5227 bfd_set_error (bfd_error_invalid_operation);
5228 return -1;
5229 }
5230
5231 buf->st_mtime = 0;
5232 buf->st_uid = 0;
5233 buf->st_gid = 0;
5234 buf->st_mode = 0644;
5235 buf->st_size = arelt_size (abfd);
5236
5237 return 0;
5238 }
5239
5240 /* If ABFD format is FORMAT and architecture is ARCH, return it.
5241 If ABFD is a fat image containing a member that corresponds to FORMAT
5242 and ARCH, returns it.
5243 In other case, returns NULL.
5244 This function allows transparent uses of fat images. */
5245
5246 bfd *
5247 bfd_mach_o_fat_extract (bfd *abfd,
5248 bfd_format format,
5249 const bfd_arch_info_type *arch)
5250 {
5251 bfd *res;
5252 mach_o_fat_data_struct *adata;
5253 unsigned int i;
5254
5255 if (bfd_check_format (abfd, format))
5256 {
5257 if (bfd_get_arch_info (abfd) == arch)
5258 return abfd;
5259 return NULL;
5260 }
5261 if (!bfd_check_format (abfd, bfd_archive)
5262 || abfd->xvec != &mach_o_fat_vec)
5263 return NULL;
5264
5265 /* This is a Mach-O fat image. */
5266 adata = (mach_o_fat_data_struct *) abfd->tdata.mach_o_fat_data;
5267 BFD_ASSERT (adata != NULL);
5268
5269 for (i = 0; i < adata->nfat_arch; i++)
5270 {
5271 struct mach_o_fat_archentry *e = &adata->archentries[i];
5272 enum bfd_architecture cpu_type;
5273 unsigned long cpu_subtype;
5274
5275 bfd_mach_o_convert_architecture (e->cputype, e->cpusubtype,
5276 &cpu_type, &cpu_subtype);
5277 if (cpu_type != arch->arch || cpu_subtype != arch->mach)
5278 continue;
5279
5280 /* The architecture is found. */
5281 res = _bfd_new_bfd_contained_in (abfd);
5282 if (res == NULL)
5283 return NULL;
5284
5285 bfd_mach_o_fat_member_init (res, cpu_type, cpu_subtype, e);
5286
5287 if (bfd_check_format (res, format))
5288 {
5289 BFD_ASSERT (bfd_get_arch_info (res) == arch);
5290 return res;
5291 }
5292 bfd_close (res);
5293 return NULL;
5294 }
5295
5296 return NULL;
5297 }
5298
5299 int
5300 bfd_mach_o_lookup_command (bfd *abfd,
5301 bfd_mach_o_load_command_type type,
5302 bfd_mach_o_load_command **mcommand)
5303 {
5304 struct mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5305 struct bfd_mach_o_load_command *cmd;
5306 unsigned int num;
5307
5308 BFD_ASSERT (mdata != NULL);
5309 BFD_ASSERT (mcommand != NULL);
5310
5311 num = 0;
5312 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5313 {
5314 if (cmd->type != type)
5315 continue;
5316
5317 if (num == 0)
5318 *mcommand = cmd;
5319 num++;
5320 }
5321
5322 return num;
5323 }
5324
5325 unsigned long
5326 bfd_mach_o_stack_addr (enum bfd_mach_o_cpu_type type)
5327 {
5328 switch (type)
5329 {
5330 case BFD_MACH_O_CPU_TYPE_MC680x0:
5331 return 0x04000000;
5332 case BFD_MACH_O_CPU_TYPE_MC88000:
5333 return 0xffffe000;
5334 case BFD_MACH_O_CPU_TYPE_POWERPC:
5335 return 0xc0000000;
5336 case BFD_MACH_O_CPU_TYPE_I386:
5337 return 0xc0000000;
5338 case BFD_MACH_O_CPU_TYPE_SPARC:
5339 return 0xf0000000;
5340 case BFD_MACH_O_CPU_TYPE_I860:
5341 return 0;
5342 case BFD_MACH_O_CPU_TYPE_HPPA:
5343 return 0xc0000000 - 0x04000000;
5344 default:
5345 return 0;
5346 }
5347 }
5348
5349 /* The following two tables should be kept, as far as possible, in order of
5350 most frequently used entries to optimize their use from gas. */
5351
5352 const bfd_mach_o_xlat_name bfd_mach_o_section_type_name[] =
5353 {
5354 { "regular", BFD_MACH_O_S_REGULAR},
5355 { "coalesced", BFD_MACH_O_S_COALESCED},
5356 { "zerofill", BFD_MACH_O_S_ZEROFILL},
5357 { "cstring_literals", BFD_MACH_O_S_CSTRING_LITERALS},
5358 { "4byte_literals", BFD_MACH_O_S_4BYTE_LITERALS},
5359 { "8byte_literals", BFD_MACH_O_S_8BYTE_LITERALS},
5360 { "16byte_literals", BFD_MACH_O_S_16BYTE_LITERALS},
5361 { "literal_pointers", BFD_MACH_O_S_LITERAL_POINTERS},
5362 { "mod_init_func_pointers", BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS},
5363 { "mod_fini_func_pointers", BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS},
5364 { "gb_zerofill", BFD_MACH_O_S_GB_ZEROFILL},
5365 { "interposing", BFD_MACH_O_S_INTERPOSING},
5366 { "dtrace_dof", BFD_MACH_O_S_DTRACE_DOF},
5367 { "non_lazy_symbol_pointers", BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS},
5368 { "lazy_symbol_pointers", BFD_MACH_O_S_LAZY_SYMBOL_POINTERS},
5369 { "symbol_stubs", BFD_MACH_O_S_SYMBOL_STUBS},
5370 { "lazy_dylib_symbol_pointers", BFD_MACH_O_S_LAZY_DYLIB_SYMBOL_POINTERS},
5371 { NULL, 0}
5372 };
5373
5374 const bfd_mach_o_xlat_name bfd_mach_o_section_attribute_name[] =
5375 {
5376 { "pure_instructions", BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS },
5377 { "some_instructions", BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS },
5378 { "loc_reloc", BFD_MACH_O_S_ATTR_LOC_RELOC },
5379 { "ext_reloc", BFD_MACH_O_S_ATTR_EXT_RELOC },
5380 { "debug", BFD_MACH_O_S_ATTR_DEBUG },
5381 { "live_support", BFD_MACH_O_S_ATTR_LIVE_SUPPORT },
5382 { "no_dead_strip", BFD_MACH_O_S_ATTR_NO_DEAD_STRIP },
5383 { "strip_static_syms", BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS },
5384 { "no_toc", BFD_MACH_O_S_ATTR_NO_TOC },
5385 { "self_modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
5386 { "modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
5387 { NULL, 0}
5388 };
5389
5390 /* Get the section type from NAME. Return 256 if NAME is unknown. */
5391
5392 unsigned int
5393 bfd_mach_o_get_section_type_from_name (bfd *abfd, const char *name)
5394 {
5395 const bfd_mach_o_xlat_name *x;
5396 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
5397
5398 for (x = bfd_mach_o_section_type_name; x->name; x++)
5399 if (strcmp (x->name, name) == 0)
5400 {
5401 /* We found it... does the target support it? */
5402 if (bed->bfd_mach_o_section_type_valid_for_target == NULL
5403 || bed->bfd_mach_o_section_type_valid_for_target (x->val))
5404 return x->val; /* OK. */
5405 else
5406 break; /* Not supported. */
5407 }
5408 /* Maximum section ID = 0xff. */
5409 return 256;
5410 }
5411
5412 /* Get the section attribute from NAME. Return -1 if NAME is unknown. */
5413
5414 unsigned int
5415 bfd_mach_o_get_section_attribute_from_name (const char *name)
5416 {
5417 const bfd_mach_o_xlat_name *x;
5418
5419 for (x = bfd_mach_o_section_attribute_name; x->name; x++)
5420 if (strcmp (x->name, name) == 0)
5421 return x->val;
5422 return (unsigned int)-1;
5423 }
5424
5425 int
5426 bfd_mach_o_core_fetch_environment (bfd *abfd,
5427 unsigned char **rbuf,
5428 unsigned int *rlen)
5429 {
5430 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5431 unsigned long stackaddr = bfd_mach_o_stack_addr (mdata->header.cputype);
5432 bfd_mach_o_load_command *cmd;
5433
5434 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5435 {
5436 bfd_mach_o_segment_command *seg;
5437
5438 if (cmd->type != BFD_MACH_O_LC_SEGMENT)
5439 continue;
5440
5441 seg = &cmd->command.segment;
5442
5443 if ((seg->vmaddr + seg->vmsize) == stackaddr)
5444 {
5445 unsigned long start = seg->fileoff;
5446 unsigned long end = seg->fileoff + seg->filesize;
5447 unsigned char *buf = bfd_malloc (1024);
5448 unsigned long size = 1024;
5449
5450 for (;;)
5451 {
5452 bfd_size_type nread = 0;
5453 unsigned long offset;
5454 int found_nonnull = 0;
5455
5456 if (size > (end - start))
5457 size = (end - start);
5458
5459 buf = bfd_realloc_or_free (buf, size);
5460 if (buf == NULL)
5461 return -1;
5462
5463 if (bfd_seek (abfd, end - size, SEEK_SET) != 0)
5464 {
5465 free (buf);
5466 return -1;
5467 }
5468
5469 nread = bfd_bread (buf, size, abfd);
5470
5471 if (nread != size)
5472 {
5473 free (buf);
5474 return -1;
5475 }
5476
5477 for (offset = 4; offset <= size; offset += 4)
5478 {
5479 unsigned long val;
5480
5481 val = *((unsigned long *) (buf + size - offset));
5482 if (! found_nonnull)
5483 {
5484 if (val != 0)
5485 found_nonnull = 1;
5486 }
5487 else if (val == 0x0)
5488 {
5489 unsigned long bottom;
5490 unsigned long top;
5491
5492 bottom = seg->fileoff + seg->filesize - offset;
5493 top = seg->fileoff + seg->filesize - 4;
5494 *rbuf = bfd_malloc (top - bottom);
5495 *rlen = top - bottom;
5496
5497 memcpy (*rbuf, buf + size - *rlen, *rlen);
5498 free (buf);
5499 return 0;
5500 }
5501 }
5502
5503 if (size == (end - start))
5504 break;
5505
5506 size *= 2;
5507 }
5508
5509 free (buf);
5510 }
5511 }
5512
5513 return -1;
5514 }
5515
5516 char *
5517 bfd_mach_o_core_file_failing_command (bfd *abfd)
5518 {
5519 unsigned char *buf = NULL;
5520 unsigned int len = 0;
5521 int ret;
5522
5523 ret = bfd_mach_o_core_fetch_environment (abfd, &buf, &len);
5524 if (ret < 0)
5525 return NULL;
5526
5527 return (char *) buf;
5528 }
5529
5530 int
5531 bfd_mach_o_core_file_failing_signal (bfd *abfd ATTRIBUTE_UNUSED)
5532 {
5533 return 0;
5534 }
5535
5536 static bfd_mach_o_uuid_command *
5537 bfd_mach_o_lookup_uuid_command (bfd *abfd)
5538 {
5539 bfd_mach_o_load_command *uuid_cmd;
5540 int ncmd = bfd_mach_o_lookup_command (abfd, BFD_MACH_O_LC_UUID, &uuid_cmd);
5541 if (ncmd != 1)
5542 return FALSE;
5543 return &uuid_cmd->command.uuid;
5544 }
5545
5546 /* Return true if ABFD is a dSYM file and its UUID matches UUID_CMD. */
5547
5548 static bfd_boolean
5549 bfd_mach_o_dsym_for_uuid_p (bfd *abfd, const bfd_mach_o_uuid_command *uuid_cmd)
5550 {
5551 bfd_mach_o_uuid_command *dsym_uuid_cmd;
5552
5553 BFD_ASSERT (abfd);
5554 BFD_ASSERT (uuid_cmd);
5555
5556 if (!bfd_check_format (abfd, bfd_object))
5557 return FALSE;
5558
5559 if (bfd_get_flavour (abfd) != bfd_target_mach_o_flavour
5560 || bfd_mach_o_get_data (abfd) == NULL
5561 || bfd_mach_o_get_data (abfd)->header.filetype != BFD_MACH_O_MH_DSYM)
5562 return FALSE;
5563
5564 dsym_uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd);
5565 if (dsym_uuid_cmd == NULL)
5566 return FALSE;
5567
5568 if (memcmp (uuid_cmd->uuid, dsym_uuid_cmd->uuid,
5569 sizeof (uuid_cmd->uuid)) != 0)
5570 return FALSE;
5571
5572 return TRUE;
5573 }
5574
5575 /* Find a BFD in DSYM_FILENAME which matches ARCH and UUID_CMD.
5576 The caller is responsible for closing the returned BFD object and
5577 its my_archive if the returned BFD is in a fat dSYM. */
5578
5579 static bfd *
5580 bfd_mach_o_find_dsym (const char *dsym_filename,
5581 const bfd_mach_o_uuid_command *uuid_cmd,
5582 const bfd_arch_info_type *arch)
5583 {
5584 bfd *base_dsym_bfd, *dsym_bfd;
5585
5586 BFD_ASSERT (uuid_cmd);
5587
5588 base_dsym_bfd = bfd_openr (dsym_filename, NULL);
5589 if (base_dsym_bfd == NULL)
5590 return NULL;
5591
5592 dsym_bfd = bfd_mach_o_fat_extract (base_dsym_bfd, bfd_object, arch);
5593 if (bfd_mach_o_dsym_for_uuid_p (dsym_bfd, uuid_cmd))
5594 return dsym_bfd;
5595
5596 bfd_close (dsym_bfd);
5597 if (base_dsym_bfd != dsym_bfd)
5598 bfd_close (base_dsym_bfd);
5599
5600 return NULL;
5601 }
5602
5603 /* Return a BFD created from a dSYM file for ABFD.
5604 The caller is responsible for closing the returned BFD object, its
5605 filename, and its my_archive if the returned BFD is in a fat dSYM. */
5606
5607 static bfd *
5608 bfd_mach_o_follow_dsym (bfd *abfd)
5609 {
5610 char *dsym_filename;
5611 bfd_mach_o_uuid_command *uuid_cmd;
5612 bfd *dsym_bfd, *base_bfd = abfd;
5613 const char *base_basename;
5614
5615 if (abfd == NULL || bfd_get_flavour (abfd) != bfd_target_mach_o_flavour)
5616 return NULL;
5617
5618 if (abfd->my_archive)
5619 base_bfd = abfd->my_archive;
5620 /* BFD may have been opened from a stream. */
5621 if (base_bfd->filename == NULL)
5622 {
5623 bfd_set_error (bfd_error_invalid_operation);
5624 return NULL;
5625 }
5626 base_basename = lbasename (base_bfd->filename);
5627
5628 uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd);
5629 if (uuid_cmd == NULL)
5630 return NULL;
5631
5632 /* TODO: We assume the DWARF file has the same as the binary's.
5633 It seems apple's GDB checks all files in the dSYM bundle directory.
5634 http://opensource.apple.com/source/gdb/gdb-1708/src/gdb/macosx/macosx-tdep.c
5635 */
5636 dsym_filename = (char *)bfd_malloc (strlen (base_bfd->filename)
5637 + strlen (dsym_subdir) + 1
5638 + strlen (base_basename) + 1);
5639 sprintf (dsym_filename, "%s%s/%s",
5640 base_bfd->filename, dsym_subdir, base_basename);
5641
5642 dsym_bfd = bfd_mach_o_find_dsym (dsym_filename, uuid_cmd,
5643 bfd_get_arch_info (abfd));
5644 if (dsym_bfd == NULL)
5645 free (dsym_filename);
5646
5647 return dsym_bfd;
5648 }
5649
5650 bfd_boolean
5651 bfd_mach_o_find_nearest_line (bfd *abfd,
5652 asymbol **symbols,
5653 asection *section,
5654 bfd_vma offset,
5655 const char **filename_ptr,
5656 const char **functionname_ptr,
5657 unsigned int *line_ptr,
5658 unsigned int *discriminator_ptr)
5659 {
5660 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5661 if (mdata == NULL)
5662 return FALSE;
5663 switch (mdata->header.filetype)
5664 {
5665 case BFD_MACH_O_MH_OBJECT:
5666 break;
5667 case BFD_MACH_O_MH_EXECUTE:
5668 case BFD_MACH_O_MH_DYLIB:
5669 case BFD_MACH_O_MH_BUNDLE:
5670 case BFD_MACH_O_MH_KEXT_BUNDLE:
5671 if (mdata->dwarf2_find_line_info == NULL)
5672 {
5673 mdata->dsym_bfd = bfd_mach_o_follow_dsym (abfd);
5674 /* When we couldn't find dSYM for this binary, we look for
5675 the debug information in the binary itself. In this way,
5676 we won't try finding separated dSYM again because
5677 mdata->dwarf2_find_line_info will be filled. */
5678 if (! mdata->dsym_bfd)
5679 break;
5680 if (! _bfd_dwarf2_slurp_debug_info (abfd, mdata->dsym_bfd,
5681 dwarf_debug_sections, symbols,
5682 &mdata->dwarf2_find_line_info,
5683 FALSE))
5684 return FALSE;
5685 }
5686 break;
5687 default:
5688 return FALSE;
5689 }
5690 return _bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset,
5691 filename_ptr, functionname_ptr,
5692 line_ptr, discriminator_ptr,
5693 dwarf_debug_sections, 0,
5694 &mdata->dwarf2_find_line_info);
5695 }
5696
5697 bfd_boolean
5698 bfd_mach_o_close_and_cleanup (bfd *abfd)
5699 {
5700 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5701 if (bfd_get_format (abfd) == bfd_object && mdata != NULL)
5702 {
5703 _bfd_dwarf2_cleanup_debug_info (abfd, &mdata->dwarf2_find_line_info);
5704 bfd_mach_o_free_cached_info (abfd);
5705 if (mdata->dsym_bfd != NULL)
5706 {
5707 bfd *fat_bfd = mdata->dsym_bfd->my_archive;
5708 char *dsym_filename = (char *)(fat_bfd
5709 ? fat_bfd->filename
5710 : mdata->dsym_bfd->filename);
5711 bfd_close (mdata->dsym_bfd);
5712 mdata->dsym_bfd = NULL;
5713 if (fat_bfd)
5714 bfd_close (fat_bfd);
5715 free (dsym_filename);
5716 }
5717 }
5718
5719 if (bfd_get_format (abfd) == bfd_archive
5720 && abfd->xvec == &mach_o_fat_vec)
5721 return TRUE;
5722 return _bfd_generic_close_and_cleanup (abfd);
5723 }
5724
5725 bfd_boolean bfd_mach_o_free_cached_info (bfd *abfd)
5726 {
5727 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5728 asection *asect;
5729 free (mdata->dyn_reloc_cache);
5730 mdata->dyn_reloc_cache = NULL;
5731 for (asect = abfd->sections; asect != NULL; asect = asect->next)
5732 {
5733 free (asect->relocation);
5734 asect->relocation = NULL;
5735 }
5736
5737 return TRUE;
5738 }
5739
5740 #define bfd_mach_o_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
5741 #define bfd_mach_o_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_lookup
5742
5743 #define bfd_mach_o_swap_reloc_in NULL
5744 #define bfd_mach_o_swap_reloc_out NULL
5745 #define bfd_mach_o_print_thread NULL
5746 #define bfd_mach_o_tgt_seg_table NULL
5747 #define bfd_mach_o_section_type_valid_for_tgt NULL
5748
5749 #define TARGET_NAME mach_o_be_vec
5750 #define TARGET_STRING "mach-o-be"
5751 #define TARGET_ARCHITECTURE bfd_arch_unknown
5752 #define TARGET_PAGESIZE 1
5753 #define TARGET_BIG_ENDIAN 1
5754 #define TARGET_ARCHIVE 0
5755 #define TARGET_PRIORITY 1
5756 #include "mach-o-target.c"
5757
5758 #undef TARGET_NAME
5759 #undef TARGET_STRING
5760 #undef TARGET_ARCHITECTURE
5761 #undef TARGET_PAGESIZE
5762 #undef TARGET_BIG_ENDIAN
5763 #undef TARGET_ARCHIVE
5764 #undef TARGET_PRIORITY
5765
5766 #define TARGET_NAME mach_o_le_vec
5767 #define TARGET_STRING "mach-o-le"
5768 #define TARGET_ARCHITECTURE bfd_arch_unknown
5769 #define TARGET_PAGESIZE 1
5770 #define TARGET_BIG_ENDIAN 0
5771 #define TARGET_ARCHIVE 0
5772 #define TARGET_PRIORITY 1
5773
5774 #include "mach-o-target.c"
5775
5776 #undef TARGET_NAME
5777 #undef TARGET_STRING
5778 #undef TARGET_ARCHITECTURE
5779 #undef TARGET_PAGESIZE
5780 #undef TARGET_BIG_ENDIAN
5781 #undef TARGET_ARCHIVE
5782 #undef TARGET_PRIORITY
5783
5784 /* Not yet handled: creating an archive. */
5785 #define bfd_mach_o_mkarchive _bfd_noarchive_mkarchive
5786
5787 /* Not used. */
5788 #define bfd_mach_o_read_ar_hdr _bfd_noarchive_read_ar_hdr
5789 #define bfd_mach_o_write_ar_hdr _bfd_noarchive_write_ar_hdr
5790 #define bfd_mach_o_slurp_armap _bfd_noarchive_slurp_armap
5791 #define bfd_mach_o_slurp_extended_name_table _bfd_noarchive_slurp_extended_name_table
5792 #define bfd_mach_o_construct_extended_name_table _bfd_noarchive_construct_extended_name_table
5793 #define bfd_mach_o_truncate_arname _bfd_noarchive_truncate_arname
5794 #define bfd_mach_o_write_armap _bfd_noarchive_write_armap
5795 #define bfd_mach_o_get_elt_at_index _bfd_noarchive_get_elt_at_index
5796 #define bfd_mach_o_generic_stat_arch_elt bfd_mach_o_fat_stat_arch_elt
5797 #define bfd_mach_o_update_armap_timestamp _bfd_noarchive_update_armap_timestamp
5798
5799 #define TARGET_NAME mach_o_fat_vec
5800 #define TARGET_STRING "mach-o-fat"
5801 #define TARGET_ARCHITECTURE bfd_arch_unknown
5802 #define TARGET_PAGESIZE 1
5803 #define TARGET_BIG_ENDIAN 1
5804 #define TARGET_ARCHIVE 1
5805 #define TARGET_PRIORITY 0
5806
5807 #include "mach-o-target.c"
5808
5809 #undef TARGET_NAME
5810 #undef TARGET_STRING
5811 #undef TARGET_ARCHITECTURE
5812 #undef TARGET_PAGESIZE
5813 #undef TARGET_BIG_ENDIAN
5814 #undef TARGET_ARCHIVE
5815 #undef TARGET_PRIORITY
GDB Binutils - Deliverables
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