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More fixes for invalid memory accesses triggered by fuzzed binaries.
[deliverable/binutils-gdb.git] / bfd / mach-o.c
1 /* Mach-O support for BFD.
2 Copyright (C) 1999-2015 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 char * s_start;
794 char * s_end;
795 unsigned long count, i, j, n;
796 size_t size;
797 char *names;
798 char *nul_name;
799 const char stub [] = "$stub";
800
801 *ret = NULL;
802
803 /* Stop now if no symbols or no indirect symbols. */
804 if (dysymtab == NULL || dysymtab->nindirectsyms == 0
805 || symtab == NULL || symtab->symbols == NULL)
806 return 0;
807
808 /* We need to allocate a bfd symbol for every indirect symbol and to
809 allocate the memory for its name. */
810 count = dysymtab->nindirectsyms;
811 size = count * sizeof (asymbol) + 1;
812
813 for (j = 0; j < count; j++)
814 {
815 const char * strng;
816 unsigned int isym = dysymtab->indirect_syms[j];
817
818 /* Some indirect symbols are anonymous. */
819 if (isym < symtab->nsyms && (strng = symtab->symbols[isym].symbol.name))
820 /* PR 17512: file: f5b8eeba. */
821 size += strnlen (strng, symtab->strsize - (strng - symtab->strtab)) + sizeof (stub);
822 }
823
824 s_start = bfd_malloc (size);
825 s = *ret = (asymbol *) s_start;
826 if (s == NULL)
827 return -1;
828 names = (char *) (s + count);
829 nul_name = names;
830 *names++ = 0;
831 s_end = s_start + size;
832
833 n = 0;
834 for (i = 0; i < mdata->nsects; i++)
835 {
836 bfd_mach_o_section *sec = mdata->sections[i];
837 unsigned int first, last;
838 bfd_vma addr;
839 bfd_vma entry_size;
840
841 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
842 {
843 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
844 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
845 case BFD_MACH_O_S_SYMBOL_STUBS:
846 /* Only these sections have indirect symbols. */
847 first = sec->reserved1;
848 last = first + bfd_mach_o_section_get_nbr_indirect (abfd, sec);
849 addr = sec->addr;
850 entry_size = bfd_mach_o_section_get_entry_size (abfd, sec);
851
852 /* PR 17512: file: 08e15eec. */
853 if (first >= count || last >= count || first > last)
854 goto fail;
855
856 for (j = first; j < last; j++)
857 {
858 unsigned int isym = dysymtab->indirect_syms[j];
859
860 /* PR 17512: file: 04d64d9b. */
861 if (((char *) s) + sizeof (* s) > s_end)
862 goto fail;
863
864 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
865 s->section = sec->bfdsection;
866 s->value = addr - sec->addr;
867 s->udata.p = NULL;
868
869 if (isym < symtab->nsyms
870 && symtab->symbols[isym].symbol.name)
871 {
872 const char *sym = symtab->symbols[isym].symbol.name;
873 size_t len;
874
875 s->name = names;
876 len = strlen (sym);
877 /* PR 17512: file: 47dfd4d2. */
878 if (names + len >= s_end)
879 goto fail;
880 memcpy (names, sym, len);
881 names += len;
882 /* PR 17512: file: 18f340a4. */
883 if (names + sizeof (stub) >= s_end)
884 goto fail;
885 memcpy (names, stub, sizeof (stub));
886 names += sizeof (stub);
887 }
888 else
889 s->name = nul_name;
890
891 addr += entry_size;
892 s++;
893 n++;
894 }
895 break;
896 default:
897 break;
898 }
899 }
900
901 return n;
902
903 fail:
904 free (s_start);
905 * ret = NULL;
906 return -1;
907 }
908
909 void
910 bfd_mach_o_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
911 asymbol *symbol,
912 symbol_info *ret)
913 {
914 bfd_symbol_info (symbol, ret);
915 }
916
917 void
918 bfd_mach_o_print_symbol (bfd *abfd,
919 void * afile,
920 asymbol *symbol,
921 bfd_print_symbol_type how)
922 {
923 FILE *file = (FILE *) afile;
924 const char *name;
925 bfd_mach_o_asymbol *asym = (bfd_mach_o_asymbol *)symbol;
926
927 switch (how)
928 {
929 case bfd_print_symbol_name:
930 fprintf (file, "%s", symbol->name);
931 break;
932 default:
933 bfd_print_symbol_vandf (abfd, (void *) file, symbol);
934 if (asym->n_type & BFD_MACH_O_N_STAB)
935 name = bfd_get_stab_name (asym->n_type);
936 else
937 switch (asym->n_type & BFD_MACH_O_N_TYPE)
938 {
939 case BFD_MACH_O_N_UNDF:
940 if (symbol->value == 0)
941 name = "UND";
942 else
943 name = "COM";
944 break;
945 case BFD_MACH_O_N_ABS:
946 name = "ABS";
947 break;
948 case BFD_MACH_O_N_INDR:
949 name = "INDR";
950 break;
951 case BFD_MACH_O_N_PBUD:
952 name = "PBUD";
953 break;
954 case BFD_MACH_O_N_SECT:
955 name = "SECT";
956 break;
957 default:
958 name = "???";
959 break;
960 }
961 if (name == NULL)
962 name = "";
963 fprintf (file, " %02x %-6s %02x %04x",
964 asym->n_type, name, asym->n_sect, asym->n_desc);
965 if ((asym->n_type & BFD_MACH_O_N_STAB) == 0
966 && (asym->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_SECT)
967 fprintf (file, " [%s]", symbol->section->name);
968 fprintf (file, " %s", symbol->name);
969 }
970 }
971
972 static void
973 bfd_mach_o_convert_architecture (bfd_mach_o_cpu_type mtype,
974 bfd_mach_o_cpu_subtype msubtype,
975 enum bfd_architecture *type,
976 unsigned long *subtype)
977 {
978 *subtype = bfd_arch_unknown;
979
980 switch (mtype)
981 {
982 case BFD_MACH_O_CPU_TYPE_VAX:
983 *type = bfd_arch_vax;
984 break;
985 case BFD_MACH_O_CPU_TYPE_MC680x0:
986 *type = bfd_arch_m68k;
987 break;
988 case BFD_MACH_O_CPU_TYPE_I386:
989 *type = bfd_arch_i386;
990 *subtype = bfd_mach_i386_i386;
991 break;
992 case BFD_MACH_O_CPU_TYPE_X86_64:
993 *type = bfd_arch_i386;
994 *subtype = bfd_mach_x86_64;
995 break;
996 case BFD_MACH_O_CPU_TYPE_MIPS:
997 *type = bfd_arch_mips;
998 break;
999 case BFD_MACH_O_CPU_TYPE_MC98000:
1000 *type = bfd_arch_m98k;
1001 break;
1002 case BFD_MACH_O_CPU_TYPE_HPPA:
1003 *type = bfd_arch_hppa;
1004 break;
1005 case BFD_MACH_O_CPU_TYPE_ARM:
1006 *type = bfd_arch_arm;
1007 switch (msubtype)
1008 {
1009 case BFD_MACH_O_CPU_SUBTYPE_ARM_V4T:
1010 *subtype = bfd_mach_arm_4T;
1011 break;
1012 case BFD_MACH_O_CPU_SUBTYPE_ARM_V6:
1013 *subtype = bfd_mach_arm_4T; /* Best fit ? */
1014 break;
1015 case BFD_MACH_O_CPU_SUBTYPE_ARM_V5TEJ:
1016 *subtype = bfd_mach_arm_5TE;
1017 break;
1018 case BFD_MACH_O_CPU_SUBTYPE_ARM_XSCALE:
1019 *subtype = bfd_mach_arm_XScale;
1020 break;
1021 case BFD_MACH_O_CPU_SUBTYPE_ARM_V7:
1022 *subtype = bfd_mach_arm_5TE; /* Best fit ? */
1023 break;
1024 case BFD_MACH_O_CPU_SUBTYPE_ARM_ALL:
1025 default:
1026 break;
1027 }
1028 break;
1029 case BFD_MACH_O_CPU_TYPE_MC88000:
1030 *type = bfd_arch_m88k;
1031 break;
1032 case BFD_MACH_O_CPU_TYPE_SPARC:
1033 *type = bfd_arch_sparc;
1034 *subtype = bfd_mach_sparc;
1035 break;
1036 case BFD_MACH_O_CPU_TYPE_I860:
1037 *type = bfd_arch_i860;
1038 break;
1039 case BFD_MACH_O_CPU_TYPE_ALPHA:
1040 *type = bfd_arch_alpha;
1041 break;
1042 case BFD_MACH_O_CPU_TYPE_POWERPC:
1043 *type = bfd_arch_powerpc;
1044 *subtype = bfd_mach_ppc;
1045 break;
1046 case BFD_MACH_O_CPU_TYPE_POWERPC_64:
1047 *type = bfd_arch_powerpc;
1048 *subtype = bfd_mach_ppc64;
1049 break;
1050 case BFD_MACH_O_CPU_TYPE_ARM64:
1051 *type = bfd_arch_aarch64;
1052 *subtype = bfd_mach_aarch64;
1053 break;
1054 default:
1055 *type = bfd_arch_unknown;
1056 break;
1057 }
1058 }
1059
1060 /* Write n NUL bytes to ABFD so that LEN + n is a multiple of 4. Return the
1061 number of bytes written or -1 in case of error. */
1062
1063 static int
1064 bfd_mach_o_pad4 (bfd *abfd, unsigned int len)
1065 {
1066 if (len % 4 != 0)
1067 {
1068 char pad[4] = {0,0,0,0};
1069 unsigned int padlen = 4 - (len % 4);
1070
1071 if (bfd_bwrite (pad, padlen, abfd) != padlen)
1072 return -1;
1073
1074 return padlen;
1075 }
1076 else
1077 return 0;
1078 }
1079
1080 /* Likewise, but for a command. */
1081
1082 static int
1083 bfd_mach_o_pad_command (bfd *abfd, unsigned int len)
1084 {
1085 unsigned int align = bfd_mach_o_wide_p (abfd) ? 8 : 4;
1086
1087 if (len % align != 0)
1088 {
1089 char pad[8] = {0};
1090 unsigned int padlen = align - (len % align);
1091
1092 if (bfd_bwrite (pad, padlen, abfd) != padlen)
1093 return -1;
1094
1095 return padlen;
1096 }
1097 else
1098 return 0;
1099 }
1100
1101 static bfd_boolean
1102 bfd_mach_o_write_header (bfd *abfd, bfd_mach_o_header *header)
1103 {
1104 struct mach_o_header_external raw;
1105 unsigned int size;
1106
1107 size = mach_o_wide_p (header) ?
1108 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
1109
1110 bfd_h_put_32 (abfd, header->magic, raw.magic);
1111 bfd_h_put_32 (abfd, header->cputype, raw.cputype);
1112 bfd_h_put_32 (abfd, header->cpusubtype, raw.cpusubtype);
1113 bfd_h_put_32 (abfd, header->filetype, raw.filetype);
1114 bfd_h_put_32 (abfd, header->ncmds, raw.ncmds);
1115 bfd_h_put_32 (abfd, header->sizeofcmds, raw.sizeofcmds);
1116 bfd_h_put_32 (abfd, header->flags, raw.flags);
1117
1118 if (mach_o_wide_p (header))
1119 bfd_h_put_32 (abfd, header->reserved, raw.reserved);
1120
1121 if (bfd_seek (abfd, 0, SEEK_SET) != 0
1122 || bfd_bwrite (&raw, size, abfd) != size)
1123 return FALSE;
1124
1125 return TRUE;
1126 }
1127
1128 static bfd_boolean
1129 bfd_mach_o_write_thread (bfd *abfd, bfd_mach_o_load_command *command)
1130 {
1131 bfd_mach_o_thread_command *cmd = &command->command.thread;
1132 unsigned int i;
1133 struct mach_o_thread_command_external raw;
1134 unsigned int offset;
1135
1136 BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD)
1137 || (command->type == BFD_MACH_O_LC_UNIXTHREAD));
1138
1139 offset = BFD_MACH_O_LC_SIZE;
1140 for (i = 0; i < cmd->nflavours; i++)
1141 {
1142 BFD_ASSERT ((cmd->flavours[i].size % 4) == 0);
1143 BFD_ASSERT (cmd->flavours[i].offset ==
1144 (command->offset + offset + BFD_MACH_O_LC_SIZE));
1145
1146 bfd_h_put_32 (abfd, cmd->flavours[i].flavour, raw.flavour);
1147 bfd_h_put_32 (abfd, (cmd->flavours[i].size / 4), raw.count);
1148
1149 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
1150 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1151 return FALSE;
1152
1153 offset += cmd->flavours[i].size + sizeof (raw);
1154 }
1155
1156 return TRUE;
1157 }
1158
1159 static bfd_boolean
1160 bfd_mach_o_write_dylinker (bfd *abfd, bfd_mach_o_load_command *command)
1161 {
1162 bfd_mach_o_dylinker_command *cmd = &command->command.dylinker;
1163 struct mach_o_str_command_external raw;
1164 unsigned int namelen;
1165
1166 bfd_h_put_32 (abfd, cmd->name_offset, raw.str);
1167
1168 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1169 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1170 return FALSE;
1171
1172 namelen = strlen (cmd->name_str) + 1;
1173 if (bfd_bwrite (cmd->name_str, namelen, abfd) != namelen)
1174 return FALSE;
1175
1176 if (bfd_mach_o_pad_command (abfd, namelen) < 0)
1177 return FALSE;
1178
1179 return TRUE;
1180 }
1181
1182 static bfd_boolean
1183 bfd_mach_o_write_dylib (bfd *abfd, bfd_mach_o_load_command *command)
1184 {
1185 bfd_mach_o_dylib_command *cmd = &command->command.dylib;
1186 struct mach_o_dylib_command_external raw;
1187 unsigned int namelen;
1188
1189 bfd_h_put_32 (abfd, cmd->name_offset, raw.name);
1190 bfd_h_put_32 (abfd, cmd->timestamp, raw.timestamp);
1191 bfd_h_put_32 (abfd, cmd->current_version, raw.current_version);
1192 bfd_h_put_32 (abfd, cmd->compatibility_version, raw.compatibility_version);
1193
1194 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1195 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1196 return FALSE;
1197
1198 namelen = strlen (cmd->name_str) + 1;
1199 if (bfd_bwrite (cmd->name_str, namelen, abfd) != namelen)
1200 return FALSE;
1201
1202 if (bfd_mach_o_pad_command (abfd, namelen) < 0)
1203 return FALSE;
1204
1205 return TRUE;
1206 }
1207
1208 static bfd_boolean
1209 bfd_mach_o_write_main (bfd *abfd, bfd_mach_o_load_command *command)
1210 {
1211 bfd_mach_o_main_command *cmd = &command->command.main;
1212 struct mach_o_entry_point_command_external raw;
1213
1214 bfd_h_put_64 (abfd, cmd->entryoff, raw.entryoff);
1215 bfd_h_put_64 (abfd, cmd->stacksize, raw.stacksize);
1216
1217 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1218 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1219 return FALSE;
1220
1221 return TRUE;
1222 }
1223
1224 static bfd_boolean
1225 bfd_mach_o_write_dyld_info (bfd *abfd, bfd_mach_o_load_command *command)
1226 {
1227 bfd_mach_o_dyld_info_command *cmd = &command->command.dyld_info;
1228 struct mach_o_dyld_info_command_external raw;
1229
1230 bfd_h_put_32 (abfd, cmd->rebase_off, raw.rebase_off);
1231 bfd_h_put_32 (abfd, cmd->rebase_size, raw.rebase_size);
1232 bfd_h_put_32 (abfd, cmd->bind_off, raw.bind_off);
1233 bfd_h_put_32 (abfd, cmd->bind_size, raw.bind_size);
1234 bfd_h_put_32 (abfd, cmd->weak_bind_off, raw.weak_bind_off);
1235 bfd_h_put_32 (abfd, cmd->weak_bind_size, raw.weak_bind_size);
1236 bfd_h_put_32 (abfd, cmd->lazy_bind_off, raw.lazy_bind_off);
1237 bfd_h_put_32 (abfd, cmd->lazy_bind_size, raw.lazy_bind_size);
1238 bfd_h_put_32 (abfd, cmd->export_off, raw.export_off);
1239 bfd_h_put_32 (abfd, cmd->export_size, raw.export_size);
1240
1241 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1242 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1243 return FALSE;
1244
1245 if (cmd->rebase_size != 0)
1246 if (bfd_seek (abfd, cmd->rebase_off, SEEK_SET) != 0
1247 || (bfd_bwrite (cmd->rebase_content, cmd->rebase_size, abfd) !=
1248 cmd->rebase_size))
1249 return FALSE;
1250
1251 if (cmd->bind_size != 0)
1252 if (bfd_seek (abfd, cmd->bind_off, SEEK_SET) != 0
1253 || (bfd_bwrite (cmd->bind_content, cmd->bind_size, abfd) !=
1254 cmd->bind_size))
1255 return FALSE;
1256
1257 if (cmd->weak_bind_size != 0)
1258 if (bfd_seek (abfd, cmd->weak_bind_off, SEEK_SET) != 0
1259 || (bfd_bwrite (cmd->weak_bind_content, cmd->weak_bind_size, abfd) !=
1260 cmd->weak_bind_size))
1261 return FALSE;
1262
1263 if (cmd->lazy_bind_size != 0)
1264 if (bfd_seek (abfd, cmd->lazy_bind_off, SEEK_SET) != 0
1265 || (bfd_bwrite (cmd->lazy_bind_content, cmd->lazy_bind_size, abfd) !=
1266 cmd->lazy_bind_size))
1267 return FALSE;
1268
1269 if (cmd->export_size != 0)
1270 if (bfd_seek (abfd, cmd->export_off, SEEK_SET) != 0
1271 || (bfd_bwrite (cmd->export_content, cmd->export_size, abfd) !=
1272 cmd->export_size))
1273 return FALSE;
1274
1275 return TRUE;
1276 }
1277
1278 long
1279 bfd_mach_o_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
1280 asection *asect)
1281 {
1282 return (asect->reloc_count + 1) * sizeof (arelent *);
1283 }
1284
1285 /* In addition to the need to byte-swap the symbol number, the bit positions
1286 of the fields in the relocation information vary per target endian-ness. */
1287
1288 static void
1289 bfd_mach_o_swap_in_non_scattered_reloc (bfd *abfd, bfd_mach_o_reloc_info *rel,
1290 unsigned char *fields)
1291 {
1292 unsigned char info = fields[3];
1293
1294 if (bfd_big_endian (abfd))
1295 {
1296 rel->r_value = (fields[0] << 16) | (fields[1] << 8) | fields[2];
1297 rel->r_type = (info >> BFD_MACH_O_BE_TYPE_SHIFT) & BFD_MACH_O_TYPE_MASK;
1298 rel->r_pcrel = (info & BFD_MACH_O_BE_PCREL) ? 1 : 0;
1299 rel->r_length = (info >> BFD_MACH_O_BE_LENGTH_SHIFT)
1300 & BFD_MACH_O_LENGTH_MASK;
1301 rel->r_extern = (info & BFD_MACH_O_BE_EXTERN) ? 1 : 0;
1302 }
1303 else
1304 {
1305 rel->r_value = (fields[2] << 16) | (fields[1] << 8) | fields[0];
1306 rel->r_type = (info >> BFD_MACH_O_LE_TYPE_SHIFT) & BFD_MACH_O_TYPE_MASK;
1307 rel->r_pcrel = (info & BFD_MACH_O_LE_PCREL) ? 1 : 0;
1308 rel->r_length = (info >> BFD_MACH_O_LE_LENGTH_SHIFT)
1309 & BFD_MACH_O_LENGTH_MASK;
1310 rel->r_extern = (info & BFD_MACH_O_LE_EXTERN) ? 1 : 0;
1311 }
1312 }
1313
1314 static int
1315 bfd_mach_o_canonicalize_one_reloc (bfd *abfd,
1316 struct mach_o_reloc_info_external *raw,
1317 arelent *res, asymbol **syms)
1318 {
1319 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1320 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1321 bfd_mach_o_reloc_info reloc;
1322 bfd_vma addr;
1323 asymbol **sym;
1324
1325 addr = bfd_get_32 (abfd, raw->r_address);
1326 res->sym_ptr_ptr = NULL;
1327 res->addend = 0;
1328
1329 if (addr & BFD_MACH_O_SR_SCATTERED)
1330 {
1331 unsigned int j;
1332 bfd_vma symnum = bfd_get_32 (abfd, raw->r_symbolnum);
1333
1334 /* Scattered relocation, can't be extern. */
1335 reloc.r_scattered = 1;
1336 reloc.r_extern = 0;
1337
1338 /* Extract section and offset from r_value (symnum). */
1339 reloc.r_value = symnum;
1340 /* FIXME: This breaks when a symbol in a reloc exactly follows the
1341 end of the data for the section (e.g. in a calculation of section
1342 data length). At present, the symbol will end up associated with
1343 the following section or, if it falls within alignment padding, as
1344 null - which will assert later. */
1345 for (j = 0; j < mdata->nsects; j++)
1346 {
1347 bfd_mach_o_section *sect = mdata->sections[j];
1348 if (symnum >= sect->addr && symnum < sect->addr + sect->size)
1349 {
1350 res->sym_ptr_ptr = sect->bfdsection->symbol_ptr_ptr;
1351 res->addend = symnum - sect->addr;
1352 break;
1353 }
1354 }
1355
1356 /* Extract the info and address fields from r_address. */
1357 reloc.r_type = BFD_MACH_O_GET_SR_TYPE (addr);
1358 reloc.r_length = BFD_MACH_O_GET_SR_LENGTH (addr);
1359 reloc.r_pcrel = addr & BFD_MACH_O_SR_PCREL;
1360 reloc.r_address = BFD_MACH_O_GET_SR_TYPE (addr);
1361 res->address = BFD_MACH_O_GET_SR_ADDRESS (addr);
1362 }
1363 else
1364 {
1365 unsigned int num;
1366
1367 /* Non-scattered relocation. */
1368 reloc.r_scattered = 0;
1369
1370 /* The value and info fields have to be extracted dependent on target
1371 endian-ness. */
1372 bfd_mach_o_swap_in_non_scattered_reloc (abfd, &reloc, raw->r_symbolnum);
1373 num = reloc.r_value;
1374
1375 if (reloc.r_extern)
1376 {
1377 /* PR 17512: file: 8396-1185-0.004. */
1378 if (bfd_get_symcount (abfd) > 0 && num > bfd_get_symcount (abfd))
1379 sym = bfd_und_section_ptr->symbol_ptr_ptr;
1380 else if (syms == NULL)
1381 sym = bfd_und_section_ptr->symbol_ptr_ptr;
1382 else
1383 /* An external symbol number. */
1384 sym = syms + num;
1385 }
1386 else if (num == 0x00ffffff || num == 0)
1387 {
1388 /* The 'symnum' in a non-scattered PAIR is 0x00ffffff. But as this
1389 is generic code, we don't know wether this is really a PAIR.
1390 This value is almost certainly not a valid section number, hence
1391 this specific case to avoid an assertion failure.
1392 Target specific swap_reloc_in routine should adjust that. */
1393 sym = bfd_abs_section_ptr->symbol_ptr_ptr;
1394 }
1395 else
1396 {
1397 /* PR 17512: file: 006-2964-0.004. */
1398 if (num > mdata->nsects)
1399 return -1;
1400
1401 /* A section number. */
1402 sym = mdata->sections[num - 1]->bfdsection->symbol_ptr_ptr;
1403 /* For a symbol defined in section S, the addend (stored in the
1404 binary) contains the address of the section. To comply with
1405 bfd convention, subtract the section address.
1406 Use the address from the header, so that the user can modify
1407 the vma of the section. */
1408 res->addend = -mdata->sections[num - 1]->addr;
1409 }
1410 /* Note: Pairs for PPC LO/HI/HA are not scattered, but contain the offset
1411 in the lower 16bits of the address value. So we have to find the
1412 'symbol' from the preceding reloc. We do this even though the
1413 section symbol is probably not needed here, because NULL symbol
1414 values cause an assert in generic BFD code. This must be done in
1415 the PPC swap_reloc_in routine. */
1416 res->sym_ptr_ptr = sym;
1417
1418 /* The 'address' is just r_address.
1419 ??? maybe this should be masked with 0xffffff for safety. */
1420 res->address = addr;
1421 reloc.r_address = addr;
1422 }
1423
1424 /* We have set up a reloc with all the information present, so the swapper
1425 can modify address, value and addend fields, if necessary, to convey
1426 information in the generic BFD reloc that is mach-o specific. */
1427
1428 if (!(*bed->_bfd_mach_o_swap_reloc_in)(res, &reloc))
1429 return -1;
1430
1431 return 0;
1432 }
1433
1434 static int
1435 bfd_mach_o_canonicalize_relocs (bfd *abfd, unsigned long filepos,
1436 unsigned long count,
1437 arelent *res, asymbol **syms)
1438 {
1439 unsigned long i;
1440 struct mach_o_reloc_info_external *native_relocs;
1441 bfd_size_type native_size;
1442
1443 /* Allocate and read relocs. */
1444 native_size = count * BFD_MACH_O_RELENT_SIZE;
1445
1446 native_relocs =
1447 (struct mach_o_reloc_info_external *) bfd_malloc (native_size);
1448 if (native_relocs == NULL)
1449 return -1;
1450
1451 if (bfd_seek (abfd, filepos, SEEK_SET) != 0
1452 || bfd_bread (native_relocs, native_size, abfd) != native_size)
1453 goto err;
1454
1455 for (i = 0; i < count; i++)
1456 {
1457 if (bfd_mach_o_canonicalize_one_reloc (abfd, &native_relocs[i],
1458 &res[i], syms) < 0)
1459 goto err;
1460 }
1461 free (native_relocs);
1462 return i;
1463 err:
1464 free (native_relocs);
1465 return -1;
1466 }
1467
1468 long
1469 bfd_mach_o_canonicalize_reloc (bfd *abfd, asection *asect,
1470 arelent **rels, asymbol **syms)
1471 {
1472 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1473 unsigned long i;
1474 arelent *res;
1475
1476 if (asect->reloc_count == 0)
1477 return 0;
1478
1479 /* No need to go further if we don't know how to read relocs. */
1480 if (bed->_bfd_mach_o_swap_reloc_in == NULL)
1481 return 0;
1482
1483 if (asect->relocation == NULL)
1484 {
1485 res = bfd_malloc (asect->reloc_count * sizeof (arelent));
1486 if (res == NULL)
1487 return -1;
1488
1489 if (bfd_mach_o_canonicalize_relocs (abfd, asect->rel_filepos,
1490 asect->reloc_count, res, syms) < 0)
1491 {
1492 free (res);
1493 return -1;
1494 }
1495 asect->relocation = res;
1496 }
1497
1498 res = asect->relocation;
1499 for (i = 0; i < asect->reloc_count; i++)
1500 rels[i] = &res[i];
1501 rels[i] = NULL;
1502
1503 return i;
1504 }
1505
1506 long
1507 bfd_mach_o_get_dynamic_reloc_upper_bound (bfd *abfd)
1508 {
1509 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1510
1511 if (mdata->dysymtab == NULL)
1512 return 1;
1513 return (mdata->dysymtab->nextrel + mdata->dysymtab->nlocrel + 1)
1514 * sizeof (arelent *);
1515 }
1516
1517 long
1518 bfd_mach_o_canonicalize_dynamic_reloc (bfd *abfd, arelent **rels,
1519 struct bfd_symbol **syms)
1520 {
1521 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1522 bfd_mach_o_dysymtab_command *dysymtab = mdata->dysymtab;
1523 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1524 unsigned long i;
1525 arelent *res;
1526
1527 if (dysymtab == NULL)
1528 return 0;
1529 if (dysymtab->nextrel == 0 && dysymtab->nlocrel == 0)
1530 return 0;
1531
1532 /* No need to go further if we don't know how to read relocs. */
1533 if (bed->_bfd_mach_o_swap_reloc_in == NULL)
1534 return 0;
1535
1536 if (mdata->dyn_reloc_cache == NULL)
1537 {
1538 res = bfd_malloc ((dysymtab->nextrel + dysymtab->nlocrel)
1539 * sizeof (arelent));
1540 if (res == NULL)
1541 return -1;
1542
1543 if (bfd_mach_o_canonicalize_relocs (abfd, dysymtab->extreloff,
1544 dysymtab->nextrel, res, syms) < 0)
1545 {
1546 free (res);
1547 return -1;
1548 }
1549
1550 if (bfd_mach_o_canonicalize_relocs (abfd, dysymtab->locreloff,
1551 dysymtab->nlocrel,
1552 res + dysymtab->nextrel, syms) < 0)
1553 {
1554 free (res);
1555 return -1;
1556 }
1557
1558 mdata->dyn_reloc_cache = res;
1559 }
1560
1561 res = mdata->dyn_reloc_cache;
1562 for (i = 0; i < dysymtab->nextrel + dysymtab->nlocrel; i++)
1563 rels[i] = &res[i];
1564 rels[i] = NULL;
1565 return i;
1566 }
1567
1568 /* In addition to the need to byte-swap the symbol number, the bit positions
1569 of the fields in the relocation information vary per target endian-ness. */
1570
1571 static void
1572 bfd_mach_o_swap_out_non_scattered_reloc (bfd *abfd, unsigned char *fields,
1573 bfd_mach_o_reloc_info *rel)
1574 {
1575 unsigned char info = 0;
1576
1577 BFD_ASSERT (rel->r_type <= 15);
1578 BFD_ASSERT (rel->r_length <= 3);
1579
1580 if (bfd_big_endian (abfd))
1581 {
1582 fields[0] = (rel->r_value >> 16) & 0xff;
1583 fields[1] = (rel->r_value >> 8) & 0xff;
1584 fields[2] = rel->r_value & 0xff;
1585 info |= rel->r_type << BFD_MACH_O_BE_TYPE_SHIFT;
1586 info |= rel->r_pcrel ? BFD_MACH_O_BE_PCREL : 0;
1587 info |= rel->r_length << BFD_MACH_O_BE_LENGTH_SHIFT;
1588 info |= rel->r_extern ? BFD_MACH_O_BE_EXTERN : 0;
1589 }
1590 else
1591 {
1592 fields[2] = (rel->r_value >> 16) & 0xff;
1593 fields[1] = (rel->r_value >> 8) & 0xff;
1594 fields[0] = rel->r_value & 0xff;
1595 info |= rel->r_type << BFD_MACH_O_LE_TYPE_SHIFT;
1596 info |= rel->r_pcrel ? BFD_MACH_O_LE_PCREL : 0;
1597 info |= rel->r_length << BFD_MACH_O_LE_LENGTH_SHIFT;
1598 info |= rel->r_extern ? BFD_MACH_O_LE_EXTERN : 0;
1599 }
1600 fields[3] = info;
1601 }
1602
1603 static bfd_boolean
1604 bfd_mach_o_write_relocs (bfd *abfd, bfd_mach_o_section *section)
1605 {
1606 unsigned int i;
1607 arelent **entries;
1608 asection *sec;
1609 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1610
1611 sec = section->bfdsection;
1612 if (sec->reloc_count == 0)
1613 return TRUE;
1614
1615 if (bed->_bfd_mach_o_swap_reloc_out == NULL)
1616 return TRUE;
1617
1618 if (bfd_seek (abfd, section->reloff, SEEK_SET) != 0)
1619 return FALSE;
1620
1621 /* Convert and write. */
1622 entries = section->bfdsection->orelocation;
1623 for (i = 0; i < section->nreloc; i++)
1624 {
1625 arelent *rel = entries[i];
1626 struct mach_o_reloc_info_external raw;
1627 bfd_mach_o_reloc_info info, *pinfo = &info;
1628
1629 /* Convert relocation to an intermediate representation. */
1630 if (!(*bed->_bfd_mach_o_swap_reloc_out) (rel, pinfo))
1631 return FALSE;
1632
1633 /* Lower the relocation info. */
1634 if (pinfo->r_scattered)
1635 {
1636 unsigned long v;
1637
1638 v = BFD_MACH_O_SR_SCATTERED
1639 | (pinfo->r_pcrel ? BFD_MACH_O_SR_PCREL : 0)
1640 | BFD_MACH_O_SET_SR_LENGTH (pinfo->r_length)
1641 | BFD_MACH_O_SET_SR_TYPE (pinfo->r_type)
1642 | BFD_MACH_O_SET_SR_ADDRESS (pinfo->r_address);
1643 /* Note: scattered relocs have field in reverse order... */
1644 bfd_put_32 (abfd, v, raw.r_address);
1645 bfd_put_32 (abfd, pinfo->r_value, raw.r_symbolnum);
1646 }
1647 else
1648 {
1649 bfd_put_32 (abfd, pinfo->r_address, raw.r_address);
1650 bfd_mach_o_swap_out_non_scattered_reloc (abfd, raw.r_symbolnum,
1651 pinfo);
1652 }
1653
1654 if (bfd_bwrite (&raw, BFD_MACH_O_RELENT_SIZE, abfd)
1655 != BFD_MACH_O_RELENT_SIZE)
1656 return FALSE;
1657 }
1658 return TRUE;
1659 }
1660
1661 static bfd_boolean
1662 bfd_mach_o_write_section_32 (bfd *abfd, bfd_mach_o_section *section)
1663 {
1664 struct mach_o_section_32_external raw;
1665
1666 memcpy (raw.sectname, section->sectname, 16);
1667 memcpy (raw.segname, section->segname, 16);
1668 bfd_h_put_32 (abfd, section->addr, raw.addr);
1669 bfd_h_put_32 (abfd, section->size, raw.size);
1670 bfd_h_put_32 (abfd, section->offset, raw.offset);
1671 bfd_h_put_32 (abfd, section->align, raw.align);
1672 bfd_h_put_32 (abfd, section->reloff, raw.reloff);
1673 bfd_h_put_32 (abfd, section->nreloc, raw.nreloc);
1674 bfd_h_put_32 (abfd, section->flags, raw.flags);
1675 bfd_h_put_32 (abfd, section->reserved1, raw.reserved1);
1676 bfd_h_put_32 (abfd, section->reserved2, raw.reserved2);
1677
1678 if (bfd_bwrite (&raw, BFD_MACH_O_SECTION_SIZE, abfd)
1679 != BFD_MACH_O_SECTION_SIZE)
1680 return FALSE;
1681
1682 return TRUE;
1683 }
1684
1685 static bfd_boolean
1686 bfd_mach_o_write_section_64 (bfd *abfd, bfd_mach_o_section *section)
1687 {
1688 struct mach_o_section_64_external raw;
1689
1690 memcpy (raw.sectname, section->sectname, 16);
1691 memcpy (raw.segname, section->segname, 16);
1692 bfd_h_put_64 (abfd, section->addr, raw.addr);
1693 bfd_h_put_64 (abfd, section->size, raw.size);
1694 bfd_h_put_32 (abfd, section->offset, raw.offset);
1695 bfd_h_put_32 (abfd, section->align, raw.align);
1696 bfd_h_put_32 (abfd, section->reloff, raw.reloff);
1697 bfd_h_put_32 (abfd, section->nreloc, raw.nreloc);
1698 bfd_h_put_32 (abfd, section->flags, raw.flags);
1699 bfd_h_put_32 (abfd, section->reserved1, raw.reserved1);
1700 bfd_h_put_32 (abfd, section->reserved2, raw.reserved2);
1701 bfd_h_put_32 (abfd, section->reserved3, raw.reserved3);
1702
1703 if (bfd_bwrite (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd)
1704 != BFD_MACH_O_SECTION_64_SIZE)
1705 return FALSE;
1706
1707 return TRUE;
1708 }
1709
1710 static bfd_boolean
1711 bfd_mach_o_write_segment_32 (bfd *abfd, bfd_mach_o_load_command *command)
1712 {
1713 struct mach_o_segment_command_32_external raw;
1714 bfd_mach_o_segment_command *seg = &command->command.segment;
1715 bfd_mach_o_section *sec;
1716
1717 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT);
1718
1719 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1720 if (!bfd_mach_o_write_relocs (abfd, sec))
1721 return FALSE;
1722
1723 memcpy (raw.segname, seg->segname, 16);
1724 bfd_h_put_32 (abfd, seg->vmaddr, raw.vmaddr);
1725 bfd_h_put_32 (abfd, seg->vmsize, raw.vmsize);
1726 bfd_h_put_32 (abfd, seg->fileoff, raw.fileoff);
1727 bfd_h_put_32 (abfd, seg->filesize, raw.filesize);
1728 bfd_h_put_32 (abfd, seg->maxprot, raw.maxprot);
1729 bfd_h_put_32 (abfd, seg->initprot, raw.initprot);
1730 bfd_h_put_32 (abfd, seg->nsects, raw.nsects);
1731 bfd_h_put_32 (abfd, seg->flags, raw.flags);
1732
1733 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1734 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1735 return FALSE;
1736
1737 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1738 if (!bfd_mach_o_write_section_32 (abfd, sec))
1739 return FALSE;
1740
1741 return TRUE;
1742 }
1743
1744 static bfd_boolean
1745 bfd_mach_o_write_segment_64 (bfd *abfd, bfd_mach_o_load_command *command)
1746 {
1747 struct mach_o_segment_command_64_external raw;
1748 bfd_mach_o_segment_command *seg = &command->command.segment;
1749 bfd_mach_o_section *sec;
1750
1751 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64);
1752
1753 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1754 if (!bfd_mach_o_write_relocs (abfd, sec))
1755 return FALSE;
1756
1757 memcpy (raw.segname, seg->segname, 16);
1758 bfd_h_put_64 (abfd, seg->vmaddr, raw.vmaddr);
1759 bfd_h_put_64 (abfd, seg->vmsize, raw.vmsize);
1760 bfd_h_put_64 (abfd, seg->fileoff, raw.fileoff);
1761 bfd_h_put_64 (abfd, seg->filesize, raw.filesize);
1762 bfd_h_put_32 (abfd, seg->maxprot, raw.maxprot);
1763 bfd_h_put_32 (abfd, seg->initprot, raw.initprot);
1764 bfd_h_put_32 (abfd, seg->nsects, raw.nsects);
1765 bfd_h_put_32 (abfd, seg->flags, raw.flags);
1766
1767 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1768 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1769 return FALSE;
1770
1771 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1772 if (!bfd_mach_o_write_section_64 (abfd, sec))
1773 return FALSE;
1774
1775 return TRUE;
1776 }
1777
1778 static bfd_boolean
1779 bfd_mach_o_write_symtab_content (bfd *abfd, bfd_mach_o_symtab_command *sym)
1780 {
1781 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1782 unsigned long i;
1783 unsigned int wide = bfd_mach_o_wide_p (abfd);
1784 struct bfd_strtab_hash *strtab;
1785 asymbol **symbols = bfd_get_outsymbols (abfd);
1786 int padlen;
1787
1788 /* Write the symbols first. */
1789 if (bfd_seek (abfd, sym->symoff, SEEK_SET) != 0)
1790 return FALSE;
1791
1792 strtab = _bfd_stringtab_init ();
1793 if (strtab == NULL)
1794 return FALSE;
1795
1796 if (sym->nsyms > 0)
1797 /* Although we don't strictly need to do this, for compatibility with
1798 Darwin system tools, actually output an empty string for the index
1799 0 entry. */
1800 _bfd_stringtab_add (strtab, "", TRUE, FALSE);
1801
1802 for (i = 0; i < sym->nsyms; i++)
1803 {
1804 bfd_size_type str_index;
1805 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
1806
1807 if (s->symbol.name == 0 || s->symbol.name[0] == '\0')
1808 /* An index of 0 always means the empty string. */
1809 str_index = 0;
1810 else
1811 {
1812 str_index = _bfd_stringtab_add (strtab, s->symbol.name, TRUE, FALSE);
1813
1814 if (str_index == (bfd_size_type) -1)
1815 goto err;
1816 }
1817
1818 if (wide)
1819 {
1820 struct mach_o_nlist_64_external raw;
1821
1822 bfd_h_put_32 (abfd, str_index, raw.n_strx);
1823 bfd_h_put_8 (abfd, s->n_type, raw.n_type);
1824 bfd_h_put_8 (abfd, s->n_sect, raw.n_sect);
1825 bfd_h_put_16 (abfd, s->n_desc, raw.n_desc);
1826 bfd_h_put_64 (abfd, s->symbol.section->vma + s->symbol.value,
1827 raw.n_value);
1828
1829 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1830 goto err;
1831 }
1832 else
1833 {
1834 struct mach_o_nlist_external raw;
1835
1836 bfd_h_put_32 (abfd, str_index, raw.n_strx);
1837 bfd_h_put_8 (abfd, s->n_type, raw.n_type);
1838 bfd_h_put_8 (abfd, s->n_sect, raw.n_sect);
1839 bfd_h_put_16 (abfd, s->n_desc, raw.n_desc);
1840 bfd_h_put_32 (abfd, s->symbol.section->vma + s->symbol.value,
1841 raw.n_value);
1842
1843 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1844 goto err;
1845 }
1846 }
1847 sym->strsize = _bfd_stringtab_size (strtab);
1848 sym->stroff = mdata->filelen;
1849 mdata->filelen += sym->strsize;
1850
1851 if (bfd_seek (abfd, sym->stroff, SEEK_SET) != 0)
1852 return FALSE;
1853
1854 if (_bfd_stringtab_emit (abfd, strtab) != TRUE)
1855 goto err;
1856 _bfd_stringtab_free (strtab);
1857
1858 /* Pad string table. */
1859 padlen = bfd_mach_o_pad4 (abfd, sym->strsize);
1860 if (padlen < 0)
1861 return FALSE;
1862 mdata->filelen += padlen;
1863 sym->strsize += padlen;
1864
1865 return TRUE;
1866
1867 err:
1868 _bfd_stringtab_free (strtab);
1869 return FALSE;
1870 }
1871
1872 static bfd_boolean
1873 bfd_mach_o_write_symtab (bfd *abfd, bfd_mach_o_load_command *command)
1874 {
1875 bfd_mach_o_symtab_command *sym = &command->command.symtab;
1876 struct mach_o_symtab_command_external raw;
1877
1878 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB);
1879
1880 /* The command. */
1881 bfd_h_put_32 (abfd, sym->symoff, raw.symoff);
1882 bfd_h_put_32 (abfd, sym->nsyms, raw.nsyms);
1883 bfd_h_put_32 (abfd, sym->stroff, raw.stroff);
1884 bfd_h_put_32 (abfd, sym->strsize, raw.strsize);
1885
1886 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1887 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1888 return FALSE;
1889
1890 return TRUE;
1891 }
1892
1893 /* Count the number of indirect symbols in the image.
1894 Requires that the sections are in their final order. */
1895
1896 static unsigned int
1897 bfd_mach_o_count_indirect_symbols (bfd *abfd, bfd_mach_o_data_struct *mdata)
1898 {
1899 unsigned int i;
1900 unsigned int nisyms = 0;
1901
1902 for (i = 0; i < mdata->nsects; ++i)
1903 {
1904 bfd_mach_o_section *sec = mdata->sections[i];
1905
1906 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
1907 {
1908 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
1909 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
1910 case BFD_MACH_O_S_SYMBOL_STUBS:
1911 nisyms += bfd_mach_o_section_get_nbr_indirect (abfd, sec);
1912 break;
1913 default:
1914 break;
1915 }
1916 }
1917 return nisyms;
1918 }
1919
1920 /* Create the dysymtab. */
1921
1922 static bfd_boolean
1923 bfd_mach_o_build_dysymtab (bfd *abfd, bfd_mach_o_dysymtab_command *cmd)
1924 {
1925 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1926
1927 /* TODO:
1928 We are not going to try and fill these in yet and, moreover, we are
1929 going to bail if they are already set. */
1930 if (cmd->nmodtab != 0
1931 || cmd->ntoc != 0
1932 || cmd->nextrefsyms != 0)
1933 {
1934 (*_bfd_error_handler) (_("sorry: modtab, toc and extrefsyms are not yet"
1935 " implemented for dysymtab commands."));
1936 return FALSE;
1937 }
1938
1939 cmd->ilocalsym = 0;
1940
1941 if (bfd_get_symcount (abfd) > 0)
1942 {
1943 asymbol **symbols = bfd_get_outsymbols (abfd);
1944 unsigned long i;
1945
1946 /* Count the number of each kind of symbol. */
1947 for (i = 0; i < bfd_get_symcount (abfd); ++i)
1948 {
1949 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
1950 if (s->n_type & (BFD_MACH_O_N_EXT | BFD_MACH_O_N_PEXT))
1951 break;
1952 }
1953 cmd->nlocalsym = i;
1954 cmd->iextdefsym = i;
1955 for (; i < bfd_get_symcount (abfd); ++i)
1956 {
1957 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
1958 if ((s->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_UNDF)
1959 break;
1960 }
1961 cmd->nextdefsym = i - cmd->nlocalsym;
1962 cmd->iundefsym = cmd->nextdefsym + cmd->iextdefsym;
1963 cmd->nundefsym = bfd_get_symcount (abfd)
1964 - cmd->nlocalsym
1965 - cmd->nextdefsym;
1966 }
1967 else
1968 {
1969 cmd->nlocalsym = 0;
1970 cmd->iextdefsym = 0;
1971 cmd->nextdefsym = 0;
1972 cmd->iundefsym = 0;
1973 cmd->nundefsym = 0;
1974 }
1975
1976 cmd->nindirectsyms = bfd_mach_o_count_indirect_symbols (abfd, mdata);
1977 if (cmd->nindirectsyms > 0)
1978 {
1979 unsigned i;
1980 unsigned n;
1981
1982 mdata->filelen = FILE_ALIGN (mdata->filelen, 2);
1983 cmd->indirectsymoff = mdata->filelen;
1984 mdata->filelen += cmd->nindirectsyms * 4;
1985
1986 cmd->indirect_syms = bfd_zalloc (abfd, cmd->nindirectsyms * 4);
1987 if (cmd->indirect_syms == NULL)
1988 return FALSE;
1989
1990 n = 0;
1991 for (i = 0; i < mdata->nsects; ++i)
1992 {
1993 bfd_mach_o_section *sec = mdata->sections[i];
1994
1995 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
1996 {
1997 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
1998 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
1999 case BFD_MACH_O_S_SYMBOL_STUBS:
2000 {
2001 unsigned j, num;
2002 bfd_mach_o_asymbol **isyms = sec->indirect_syms;
2003
2004 num = bfd_mach_o_section_get_nbr_indirect (abfd, sec);
2005 if (isyms == NULL || num == 0)
2006 break;
2007 /* Record the starting index in the reserved1 field. */
2008 sec->reserved1 = n;
2009 for (j = 0; j < num; j++, n++)
2010 {
2011 if (isyms[j] == NULL)
2012 cmd->indirect_syms[n] = BFD_MACH_O_INDIRECT_SYM_LOCAL;
2013 else if (isyms[j]->symbol.section == bfd_abs_section_ptr
2014 && ! (isyms[j]->n_type & BFD_MACH_O_N_EXT))
2015 cmd->indirect_syms[n] = BFD_MACH_O_INDIRECT_SYM_LOCAL
2016 | BFD_MACH_O_INDIRECT_SYM_ABS;
2017 else
2018 cmd->indirect_syms[n] = isyms[j]->symbol.udata.i;
2019 }
2020 }
2021 break;
2022 default:
2023 break;
2024 }
2025 }
2026 }
2027
2028 return TRUE;
2029 }
2030
2031 /* Write a dysymtab command.
2032 TODO: Possibly coalesce writes of smaller objects. */
2033
2034 static bfd_boolean
2035 bfd_mach_o_write_dysymtab (bfd *abfd, bfd_mach_o_load_command *command)
2036 {
2037 bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab;
2038
2039 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB);
2040
2041 if (cmd->nmodtab != 0)
2042 {
2043 unsigned int i;
2044
2045 if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0)
2046 return FALSE;
2047
2048 for (i = 0; i < cmd->nmodtab; i++)
2049 {
2050 bfd_mach_o_dylib_module *module = &cmd->dylib_module[i];
2051 unsigned int iinit;
2052 unsigned int ninit;
2053
2054 iinit = module->iinit & 0xffff;
2055 iinit |= ((module->iterm & 0xffff) << 16);
2056
2057 ninit = module->ninit & 0xffff;
2058 ninit |= ((module->nterm & 0xffff) << 16);
2059
2060 if (bfd_mach_o_wide_p (abfd))
2061 {
2062 struct mach_o_dylib_module_64_external w;
2063
2064 bfd_h_put_32 (abfd, module->module_name_idx, &w.module_name);
2065 bfd_h_put_32 (abfd, module->iextdefsym, &w.iextdefsym);
2066 bfd_h_put_32 (abfd, module->nextdefsym, &w.nextdefsym);
2067 bfd_h_put_32 (abfd, module->irefsym, &w.irefsym);
2068 bfd_h_put_32 (abfd, module->nrefsym, &w.nrefsym);
2069 bfd_h_put_32 (abfd, module->ilocalsym, &w.ilocalsym);
2070 bfd_h_put_32 (abfd, module->nlocalsym, &w.nlocalsym);
2071 bfd_h_put_32 (abfd, module->iextrel, &w.iextrel);
2072 bfd_h_put_32 (abfd, module->nextrel, &w.nextrel);
2073 bfd_h_put_32 (abfd, iinit, &w.iinit_iterm);
2074 bfd_h_put_32 (abfd, ninit, &w.ninit_nterm);
2075 bfd_h_put_64 (abfd, module->objc_module_info_addr,
2076 &w.objc_module_info_addr);
2077 bfd_h_put_32 (abfd, module->objc_module_info_size,
2078 &w.objc_module_info_size);
2079
2080 if (bfd_bwrite ((void *) &w, sizeof (w), abfd) != sizeof (w))
2081 return FALSE;
2082 }
2083 else
2084 {
2085 struct mach_o_dylib_module_external n;
2086
2087 bfd_h_put_32 (abfd, module->module_name_idx, &n.module_name);
2088 bfd_h_put_32 (abfd, module->iextdefsym, &n.iextdefsym);
2089 bfd_h_put_32 (abfd, module->nextdefsym, &n.nextdefsym);
2090 bfd_h_put_32 (abfd, module->irefsym, &n.irefsym);
2091 bfd_h_put_32 (abfd, module->nrefsym, &n.nrefsym);
2092 bfd_h_put_32 (abfd, module->ilocalsym, &n.ilocalsym);
2093 bfd_h_put_32 (abfd, module->nlocalsym, &n.nlocalsym);
2094 bfd_h_put_32 (abfd, module->iextrel, &n.iextrel);
2095 bfd_h_put_32 (abfd, module->nextrel, &n.nextrel);
2096 bfd_h_put_32 (abfd, iinit, &n.iinit_iterm);
2097 bfd_h_put_32 (abfd, ninit, &n.ninit_nterm);
2098 bfd_h_put_32 (abfd, module->objc_module_info_addr,
2099 &n.objc_module_info_addr);
2100 bfd_h_put_32 (abfd, module->objc_module_info_size,
2101 &n.objc_module_info_size);
2102
2103 if (bfd_bwrite ((void *) &n, sizeof (n), abfd) != sizeof (n))
2104 return FALSE;
2105 }
2106 }
2107 }
2108
2109 if (cmd->ntoc != 0)
2110 {
2111 unsigned int i;
2112
2113 if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0)
2114 return FALSE;
2115
2116 for (i = 0; i < cmd->ntoc; i++)
2117 {
2118 struct mach_o_dylib_table_of_contents_external raw;
2119 bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i];
2120
2121 bfd_h_put_32 (abfd, toc->symbol_index, &raw.symbol_index);
2122 bfd_h_put_32 (abfd, toc->module_index, &raw.module_index);
2123
2124 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
2125 return FALSE;
2126 }
2127 }
2128
2129 if (cmd->nindirectsyms > 0)
2130 {
2131 unsigned int i;
2132
2133 if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0)
2134 return FALSE;
2135
2136 for (i = 0; i < cmd->nindirectsyms; ++i)
2137 {
2138 unsigned char raw[4];
2139
2140 bfd_h_put_32 (abfd, cmd->indirect_syms[i], &raw);
2141 if (bfd_bwrite (raw, sizeof (raw), abfd) != sizeof (raw))
2142 return FALSE;
2143 }
2144 }
2145
2146 if (cmd->nextrefsyms != 0)
2147 {
2148 unsigned int i;
2149
2150 if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0)
2151 return FALSE;
2152
2153 for (i = 0; i < cmd->nextrefsyms; i++)
2154 {
2155 unsigned long v;
2156 unsigned char raw[4];
2157 bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i];
2158
2159 /* Fields isym and flags are written as bit-fields, thus we need
2160 a specific processing for endianness. */
2161
2162 if (bfd_big_endian (abfd))
2163 {
2164 v = ((ref->isym & 0xffffff) << 8);
2165 v |= ref->flags & 0xff;
2166 }
2167 else
2168 {
2169 v = ref->isym & 0xffffff;
2170 v |= ((ref->flags & 0xff) << 24);
2171 }
2172
2173 bfd_h_put_32 (abfd, v, raw);
2174 if (bfd_bwrite (raw, sizeof (raw), abfd) != sizeof (raw))
2175 return FALSE;
2176 }
2177 }
2178
2179 /* The command. */
2180 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0)
2181 return FALSE;
2182 else
2183 {
2184 struct mach_o_dysymtab_command_external raw;
2185
2186 bfd_h_put_32 (abfd, cmd->ilocalsym, &raw.ilocalsym);
2187 bfd_h_put_32 (abfd, cmd->nlocalsym, &raw.nlocalsym);
2188 bfd_h_put_32 (abfd, cmd->iextdefsym, &raw.iextdefsym);
2189 bfd_h_put_32 (abfd, cmd->nextdefsym, &raw.nextdefsym);
2190 bfd_h_put_32 (abfd, cmd->iundefsym, &raw.iundefsym);
2191 bfd_h_put_32 (abfd, cmd->nundefsym, &raw.nundefsym);
2192 bfd_h_put_32 (abfd, cmd->tocoff, &raw.tocoff);
2193 bfd_h_put_32 (abfd, cmd->ntoc, &raw.ntoc);
2194 bfd_h_put_32 (abfd, cmd->modtaboff, &raw.modtaboff);
2195 bfd_h_put_32 (abfd, cmd->nmodtab, &raw.nmodtab);
2196 bfd_h_put_32 (abfd, cmd->extrefsymoff, &raw.extrefsymoff);
2197 bfd_h_put_32 (abfd, cmd->nextrefsyms, &raw.nextrefsyms);
2198 bfd_h_put_32 (abfd, cmd->indirectsymoff, &raw.indirectsymoff);
2199 bfd_h_put_32 (abfd, cmd->nindirectsyms, &raw.nindirectsyms);
2200 bfd_h_put_32 (abfd, cmd->extreloff, &raw.extreloff);
2201 bfd_h_put_32 (abfd, cmd->nextrel, &raw.nextrel);
2202 bfd_h_put_32 (abfd, cmd->locreloff, &raw.locreloff);
2203 bfd_h_put_32 (abfd, cmd->nlocrel, &raw.nlocrel);
2204
2205 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
2206 return FALSE;
2207 }
2208
2209 return TRUE;
2210 }
2211
2212 static unsigned
2213 bfd_mach_o_primary_symbol_sort_key (bfd_mach_o_asymbol *s)
2214 {
2215 unsigned mtyp = s->n_type & BFD_MACH_O_N_TYPE;
2216
2217 /* Just leave debug symbols where they are (pretend they are local, and
2218 then they will just be sorted on position). */
2219 if (s->n_type & BFD_MACH_O_N_STAB)
2220 return 0;
2221
2222 /* Local (we should never see an undefined local AFAICT). */
2223 if (! (s->n_type & (BFD_MACH_O_N_EXT | BFD_MACH_O_N_PEXT)))
2224 return 0;
2225
2226 /* Common symbols look like undefined externs. */
2227 if (mtyp == BFD_MACH_O_N_UNDF)
2228 return 2;
2229
2230 /* A defined non-local, non-debug symbol. */
2231 return 1;
2232 }
2233
2234 static int
2235 bfd_mach_o_cf_symbols (const void *a, const void *b)
2236 {
2237 bfd_mach_o_asymbol *sa = *(bfd_mach_o_asymbol **) a;
2238 bfd_mach_o_asymbol *sb = *(bfd_mach_o_asymbol **) b;
2239 unsigned int soa, sob;
2240
2241 soa = bfd_mach_o_primary_symbol_sort_key (sa);
2242 sob = bfd_mach_o_primary_symbol_sort_key (sb);
2243 if (soa < sob)
2244 return -1;
2245
2246 if (soa > sob)
2247 return 1;
2248
2249 /* If it's local or stab, just preserve the input order. */
2250 if (soa == 0)
2251 {
2252 if (sa->symbol.udata.i < sb->symbol.udata.i)
2253 return -1;
2254 if (sa->symbol.udata.i > sb->symbol.udata.i)
2255 return 1;
2256
2257 /* This is probably an error. */
2258 return 0;
2259 }
2260
2261 /* The second sort key is name. */
2262 return strcmp (sa->symbol.name, sb->symbol.name);
2263 }
2264
2265 /* Process the symbols.
2266
2267 This should be OK for single-module files - but it is not likely to work
2268 for multi-module shared libraries.
2269
2270 (a) If the application has not filled in the relevant mach-o fields, make
2271 an estimate.
2272
2273 (b) Order them, like this:
2274 ( i) local.
2275 (unsorted)
2276 ( ii) external defined
2277 (by name)
2278 (iii) external undefined/common
2279 (by name)
2280 ( iv) common
2281 (by name)
2282 */
2283
2284 static bfd_boolean
2285 bfd_mach_o_mangle_symbols (bfd *abfd)
2286 {
2287 unsigned long i;
2288 asymbol **symbols = bfd_get_outsymbols (abfd);
2289
2290 if (symbols == NULL || bfd_get_symcount (abfd) == 0)
2291 return TRUE;
2292
2293 for (i = 0; i < bfd_get_symcount (abfd); i++)
2294 {
2295 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2296
2297 /* We use this value, which is out-of-range as a symbol index, to signal
2298 that the mach-o-specific data are not filled in and need to be created
2299 from the bfd values. It is much preferable for the application to do
2300 this, since more meaningful diagnostics can be made that way. */
2301
2302 if (s->symbol.udata.i == SYM_MACHO_FIELDS_UNSET)
2303 {
2304 /* No symbol information has been set - therefore determine
2305 it from the bfd symbol flags/info. */
2306 if (s->symbol.section == bfd_abs_section_ptr)
2307 s->n_type = BFD_MACH_O_N_ABS;
2308 else if (s->symbol.section == bfd_und_section_ptr)
2309 {
2310 s->n_type = BFD_MACH_O_N_UNDF;
2311 if (s->symbol.flags & BSF_WEAK)
2312 s->n_desc |= BFD_MACH_O_N_WEAK_REF;
2313 /* mach-o automatically makes undefined symbols extern. */
2314 s->n_type |= BFD_MACH_O_N_EXT;
2315 s->symbol.flags |= BSF_GLOBAL;
2316 }
2317 else if (s->symbol.section == bfd_com_section_ptr)
2318 {
2319 s->n_type = BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT;
2320 s->symbol.flags |= BSF_GLOBAL;
2321 }
2322 else
2323 s->n_type = BFD_MACH_O_N_SECT;
2324
2325 if (s->symbol.flags & BSF_GLOBAL)
2326 s->n_type |= BFD_MACH_O_N_EXT;
2327 }
2328
2329 /* Put the section index in, where required. */
2330 if ((s->symbol.section != bfd_abs_section_ptr
2331 && s->symbol.section != bfd_und_section_ptr
2332 && s->symbol.section != bfd_com_section_ptr)
2333 || ((s->n_type & BFD_MACH_O_N_STAB) != 0
2334 && s->symbol.name == NULL))
2335 s->n_sect = s->symbol.section->output_section->target_index;
2336
2337 /* Number to preserve order for local and debug syms. */
2338 s->symbol.udata.i = i;
2339 }
2340
2341 /* Sort the symbols. */
2342 qsort ((void *) symbols, (size_t) bfd_get_symcount (abfd),
2343 sizeof (asymbol *), bfd_mach_o_cf_symbols);
2344
2345 for (i = 0; i < bfd_get_symcount (abfd); ++i)
2346 {
2347 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2348 s->symbol.udata.i = i; /* renumber. */
2349 }
2350
2351 return TRUE;
2352 }
2353
2354 /* We build a flat table of sections, which can be re-ordered if necessary.
2355 Fill in the section number and other mach-o-specific data. */
2356
2357 static bfd_boolean
2358 bfd_mach_o_mangle_sections (bfd *abfd, bfd_mach_o_data_struct *mdata)
2359 {
2360 asection *sec;
2361 unsigned target_index;
2362 unsigned nsect;
2363
2364 nsect = bfd_count_sections (abfd);
2365
2366 /* Don't do it if it's already set - assume the application knows what it's
2367 doing. */
2368 if (mdata->nsects == nsect
2369 && (mdata->nsects == 0 || mdata->sections != NULL))
2370 return TRUE;
2371
2372 /* We need to check that this can be done... */
2373 if (nsect > 255)
2374 {
2375 (*_bfd_error_handler) (_("mach-o: there are too many sections (%u)"
2376 " maximum is 255,\n"), nsect);
2377 return FALSE;
2378 }
2379
2380 mdata->nsects = nsect;
2381 mdata->sections = bfd_alloc (abfd,
2382 mdata->nsects * sizeof (bfd_mach_o_section *));
2383 if (mdata->sections == NULL)
2384 return FALSE;
2385
2386 /* Create Mach-O sections.
2387 Section type, attribute and align should have been set when the
2388 section was created - either read in or specified. */
2389 target_index = 0;
2390 for (sec = abfd->sections; sec; sec = sec->next)
2391 {
2392 unsigned bfd_align = bfd_get_section_alignment (abfd, sec);
2393 bfd_mach_o_section *msect = bfd_mach_o_get_mach_o_section (sec);
2394
2395 mdata->sections[target_index] = msect;
2396
2397 msect->addr = bfd_get_section_vma (abfd, sec);
2398 msect->size = bfd_get_section_size (sec);
2399
2400 /* Use the largest alignment set, in case it was bumped after the
2401 section was created. */
2402 msect->align = msect->align > bfd_align ? msect->align : bfd_align;
2403
2404 msect->offset = 0;
2405 sec->target_index = ++target_index;
2406 }
2407
2408 return TRUE;
2409 }
2410
2411 bfd_boolean
2412 bfd_mach_o_write_contents (bfd *abfd)
2413 {
2414 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2415 bfd_mach_o_load_command *cmd;
2416 bfd_mach_o_symtab_command *symtab = NULL;
2417 bfd_mach_o_dysymtab_command *dysymtab = NULL;
2418 bfd_mach_o_segment_command *linkedit = NULL;
2419
2420 /* Make the commands, if not already present. */
2421 if (!abfd->output_has_begun && !bfd_mach_o_build_commands (abfd))
2422 return FALSE;
2423 abfd->output_has_begun = TRUE;
2424
2425 /* Write the header. */
2426 if (!bfd_mach_o_write_header (abfd, &mdata->header))
2427 return FALSE;
2428
2429 /* First pass: allocate the linkedit segment. */
2430 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
2431 switch (cmd->type)
2432 {
2433 case BFD_MACH_O_LC_SEGMENT_64:
2434 case BFD_MACH_O_LC_SEGMENT:
2435 if (strcmp (cmd->command.segment.segname, "__LINKEDIT") == 0)
2436 linkedit = &cmd->command.segment;
2437 break;
2438 case BFD_MACH_O_LC_SYMTAB:
2439 symtab = &cmd->command.symtab;
2440 break;
2441 case BFD_MACH_O_LC_DYSYMTAB:
2442 dysymtab = &cmd->command.dysymtab;
2443 break;
2444 case BFD_MACH_O_LC_DYLD_INFO:
2445 {
2446 bfd_mach_o_dyld_info_command *di = &cmd->command.dyld_info;
2447
2448 if (di->rebase_size != 0)
2449 {
2450 di->rebase_off = mdata->filelen;
2451 mdata->filelen += di->rebase_size;
2452 }
2453 if (di->bind_size != 0)
2454 {
2455 di->bind_off = mdata->filelen;
2456 mdata->filelen += di->bind_size;
2457 }
2458 if (di->weak_bind_size != 0)
2459 {
2460 di->weak_bind_off = mdata->filelen;
2461 mdata->filelen += di->weak_bind_size;
2462 }
2463 if (di->lazy_bind_size != 0)
2464 {
2465 di->lazy_bind_off = mdata->filelen;
2466 mdata->filelen += di->lazy_bind_size;
2467 }
2468 if (di->export_size != 0)
2469 {
2470 di->export_off = mdata->filelen;
2471 mdata->filelen += di->export_size;
2472 }
2473 }
2474 break;
2475 case BFD_MACH_O_LC_LOAD_DYLIB:
2476 case BFD_MACH_O_LC_LOAD_DYLINKER:
2477 case BFD_MACH_O_LC_MAIN:
2478 /* Nothing to do. */
2479 break;
2480 default:
2481 (*_bfd_error_handler)
2482 (_("unable to allocate data for load command 0x%lx"),
2483 (unsigned long) cmd->type);
2484 break;
2485 }
2486
2487 /* Specially handle symtab and dysymtab. */
2488
2489 /* Pre-allocate the symbol table (but not the string table). The reason
2490 is that the dysymtab is after the symbol table but before the string
2491 table (required by the native strip tool). */
2492 if (symtab != NULL)
2493 {
2494 unsigned int symlen;
2495 unsigned int wide = bfd_mach_o_wide_p (abfd);
2496
2497 symlen = wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE;
2498
2499 /* Align for symbols. */
2500 mdata->filelen = FILE_ALIGN (mdata->filelen, wide ? 3 : 2);
2501 symtab->symoff = mdata->filelen;
2502
2503 symtab->nsyms = bfd_get_symcount (abfd);
2504 mdata->filelen += symtab->nsyms * symlen;
2505 }
2506
2507 /* Build the dysymtab. */
2508 if (dysymtab != NULL)
2509 if (!bfd_mach_o_build_dysymtab (abfd, dysymtab))
2510 return FALSE;
2511
2512 /* Write symtab and strtab. */
2513 if (symtab != NULL)
2514 if (!bfd_mach_o_write_symtab_content (abfd, symtab))
2515 return FALSE;
2516
2517 /* Adjust linkedit size. */
2518 if (linkedit != NULL)
2519 {
2520 /* bfd_vma pagemask = bfd_mach_o_get_backend_data (abfd)->page_size - 1; */
2521
2522 linkedit->vmsize = mdata->filelen - linkedit->fileoff;
2523 /* linkedit->vmsize = (linkedit->vmsize + pagemask) & ~pagemask; */
2524 linkedit->filesize = mdata->filelen - linkedit->fileoff;
2525
2526 linkedit->initprot = BFD_MACH_O_PROT_READ;
2527 linkedit->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
2528 | BFD_MACH_O_PROT_EXECUTE;
2529 }
2530
2531 /* Second pass: write commands. */
2532 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
2533 {
2534 struct mach_o_load_command_external raw;
2535 unsigned long typeflag;
2536
2537 typeflag = cmd->type | (cmd->type_required ? BFD_MACH_O_LC_REQ_DYLD : 0);
2538
2539 bfd_h_put_32 (abfd, typeflag, raw.cmd);
2540 bfd_h_put_32 (abfd, cmd->len, raw.cmdsize);
2541
2542 if (bfd_seek (abfd, cmd->offset, SEEK_SET) != 0
2543 || bfd_bwrite (&raw, BFD_MACH_O_LC_SIZE, abfd) != 8)
2544 return FALSE;
2545
2546 switch (cmd->type)
2547 {
2548 case BFD_MACH_O_LC_SEGMENT:
2549 if (!bfd_mach_o_write_segment_32 (abfd, cmd))
2550 return FALSE;
2551 break;
2552 case BFD_MACH_O_LC_SEGMENT_64:
2553 if (!bfd_mach_o_write_segment_64 (abfd, cmd))
2554 return FALSE;
2555 break;
2556 case BFD_MACH_O_LC_SYMTAB:
2557 if (!bfd_mach_o_write_symtab (abfd, cmd))
2558 return FALSE;
2559 break;
2560 case BFD_MACH_O_LC_DYSYMTAB:
2561 if (!bfd_mach_o_write_dysymtab (abfd, cmd))
2562 return FALSE;
2563 break;
2564 case BFD_MACH_O_LC_THREAD:
2565 case BFD_MACH_O_LC_UNIXTHREAD:
2566 if (!bfd_mach_o_write_thread (abfd, cmd))
2567 return FALSE;
2568 break;
2569 case BFD_MACH_O_LC_LOAD_DYLIB:
2570 if (!bfd_mach_o_write_dylib (abfd, cmd))
2571 return FALSE;
2572 break;
2573 case BFD_MACH_O_LC_LOAD_DYLINKER:
2574 if (!bfd_mach_o_write_dylinker (abfd, cmd))
2575 return FALSE;
2576 break;
2577 case BFD_MACH_O_LC_MAIN:
2578 if (!bfd_mach_o_write_main (abfd, cmd))
2579 return FALSE;
2580 break;
2581 case BFD_MACH_O_LC_DYLD_INFO:
2582 if (!bfd_mach_o_write_dyld_info (abfd, cmd))
2583 return FALSE;
2584 break;
2585 default:
2586 (*_bfd_error_handler)
2587 (_("unable to write unknown load command 0x%lx"),
2588 (unsigned long) cmd->type);
2589 return FALSE;
2590 }
2591 }
2592
2593 return TRUE;
2594 }
2595
2596 static void
2597 bfd_mach_o_append_section_to_segment (bfd_mach_o_segment_command *seg,
2598 bfd_mach_o_section *s)
2599 {
2600 if (seg->sect_head == NULL)
2601 seg->sect_head = s;
2602 else
2603 seg->sect_tail->next = s;
2604 seg->sect_tail = s;
2605 }
2606
2607 /* Create section Mach-O flags from BFD flags. */
2608
2609 static void
2610 bfd_mach_o_set_section_flags_from_bfd (bfd *abfd ATTRIBUTE_UNUSED,
2611 asection *sec)
2612 {
2613 flagword bfd_flags;
2614 bfd_mach_o_section *s = bfd_mach_o_get_mach_o_section (sec);
2615
2616 /* Create default flags. */
2617 bfd_flags = bfd_get_section_flags (abfd, sec);
2618 if ((bfd_flags & SEC_CODE) == SEC_CODE)
2619 s->flags = BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS
2620 | BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS
2621 | BFD_MACH_O_S_REGULAR;
2622 else if ((bfd_flags & (SEC_ALLOC | SEC_LOAD)) == SEC_ALLOC)
2623 s->flags = BFD_MACH_O_S_ZEROFILL;
2624 else if (bfd_flags & SEC_DEBUGGING)
2625 s->flags = BFD_MACH_O_S_REGULAR | BFD_MACH_O_S_ATTR_DEBUG;
2626 else
2627 s->flags = BFD_MACH_O_S_REGULAR;
2628 }
2629
2630 static bfd_boolean
2631 bfd_mach_o_build_obj_seg_command (bfd *abfd, bfd_mach_o_segment_command *seg)
2632 {
2633 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2634 unsigned int i, j;
2635
2636 seg->vmaddr = 0;
2637 seg->fileoff = mdata->filelen;
2638 seg->initprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
2639 | BFD_MACH_O_PROT_EXECUTE;
2640 seg->maxprot = seg->initprot;
2641
2642 /* Append sections to the segment.
2643
2644 This is a little tedious, we have to honor the need to account zerofill
2645 sections after all the rest. This forces us to do the calculation of
2646 total vmsize in three passes so that any alignment increments are
2647 properly accounted. */
2648 for (i = 0; i < mdata->nsects; ++i)
2649 {
2650 bfd_mach_o_section *s = mdata->sections[i];
2651 asection *sec = s->bfdsection;
2652
2653 /* Although we account for zerofill section sizes in vm order, they are
2654 placed in the file in source sequence. */
2655 bfd_mach_o_append_section_to_segment (seg, s);
2656 s->offset = 0;
2657
2658 /* Zerofill sections have zero file size & offset, the only content
2659 written to the file is the symbols. */
2660 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) == BFD_MACH_O_S_ZEROFILL
2661 || ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2662 == BFD_MACH_O_S_GB_ZEROFILL))
2663 continue;
2664
2665 /* The Darwin system tools (in MH_OBJECT files, at least) always account
2666 sections, even those with zero size. */
2667 if (s->size > 0)
2668 {
2669 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2670 seg->vmsize += s->size;
2671
2672 /* MH_OBJECT files have unaligned content. */
2673 if (1)
2674 {
2675 seg->filesize = FILE_ALIGN (seg->filesize, s->align);
2676 mdata->filelen = FILE_ALIGN (mdata->filelen, s->align);
2677 }
2678 seg->filesize += s->size;
2679
2680 /* The system tools write even zero-sized sections with an offset
2681 field set to the current file position. */
2682 s->offset = mdata->filelen;
2683 }
2684
2685 sec->filepos = s->offset;
2686 mdata->filelen += s->size;
2687 }
2688
2689 /* Now pass through again, for zerofill, only now we just update the
2690 vmsize, and then for zerofill_GB. */
2691 for (j = 0; j < 2; j++)
2692 {
2693 unsigned int stype;
2694
2695 if (j == 0)
2696 stype = BFD_MACH_O_S_ZEROFILL;
2697 else
2698 stype = BFD_MACH_O_S_GB_ZEROFILL;
2699
2700 for (i = 0; i < mdata->nsects; ++i)
2701 {
2702 bfd_mach_o_section *s = mdata->sections[i];
2703
2704 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != stype)
2705 continue;
2706
2707 if (s->size > 0)
2708 {
2709 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2710 seg->vmsize += s->size;
2711 }
2712 }
2713 }
2714
2715 /* Allocate space for the relocations. */
2716 mdata->filelen = FILE_ALIGN (mdata->filelen, 2);
2717
2718 for (i = 0; i < mdata->nsects; ++i)
2719 {
2720 bfd_mach_o_section *ms = mdata->sections[i];
2721 asection *sec = ms->bfdsection;
2722
2723 ms->nreloc = sec->reloc_count;
2724 if (ms->nreloc == 0)
2725 {
2726 /* Clear nreloc and reloff if there is no relocs. */
2727 ms->reloff = 0;
2728 continue;
2729 }
2730 sec->rel_filepos = mdata->filelen;
2731 ms->reloff = sec->rel_filepos;
2732 mdata->filelen += sec->reloc_count * BFD_MACH_O_RELENT_SIZE;
2733 }
2734
2735 return TRUE;
2736 }
2737
2738 static bfd_boolean
2739 bfd_mach_o_build_exec_seg_command (bfd *abfd, bfd_mach_o_segment_command *seg)
2740 {
2741 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2742 unsigned int i;
2743 bfd_vma pagemask = bfd_mach_o_get_backend_data (abfd)->page_size - 1;
2744 bfd_vma vma;
2745 bfd_mach_o_section *s;
2746
2747 seg->vmsize = 0;
2748
2749 seg->fileoff = mdata->filelen;
2750 seg->maxprot = 0;
2751 seg->initprot = 0;
2752 seg->flags = 0;
2753
2754 /* Append sections to the segment. We assume they are properly ordered
2755 by vma (but we check that). */
2756 vma = 0;
2757 for (i = 0; i < mdata->nsects; ++i)
2758 {
2759 s = mdata->sections[i];
2760
2761 /* Consider only sections for this segment. */
2762 if (strcmp (seg->segname, s->segname) != 0)
2763 continue;
2764
2765 bfd_mach_o_append_section_to_segment (seg, s);
2766
2767 BFD_ASSERT (s->addr >= vma);
2768 vma = s->addr + s->size;
2769 }
2770
2771 /* Set segment file offset: make it page aligned. */
2772 vma = seg->sect_head->addr;
2773 seg->vmaddr = vma & ~pagemask;
2774 if ((mdata->filelen & pagemask) > (vma & pagemask))
2775 mdata->filelen += pagemask + 1;
2776 seg->fileoff = mdata->filelen & ~pagemask;
2777 mdata->filelen = seg->fileoff + (vma & pagemask);
2778
2779 /* Set section file offset. */
2780 for (s = seg->sect_head; s != NULL; s = s->next)
2781 {
2782 asection *sec = s->bfdsection;
2783 flagword flags = bfd_get_section_flags (abfd, sec);
2784
2785 /* Adjust segment size. */
2786 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2787 seg->vmsize += s->size;
2788
2789 /* File offset and length. */
2790 seg->filesize = FILE_ALIGN (seg->filesize, s->align);
2791
2792 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != BFD_MACH_O_S_ZEROFILL
2793 && ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2794 != BFD_MACH_O_S_GB_ZEROFILL))
2795 {
2796 mdata->filelen = FILE_ALIGN (mdata->filelen, s->align);
2797
2798 s->offset = mdata->filelen;
2799 s->bfdsection->filepos = s->offset;
2800
2801 seg->filesize += s->size;
2802 mdata->filelen += s->size;
2803 }
2804 else
2805 {
2806 s->offset = 0;
2807 s->bfdsection->filepos = 0;
2808 }
2809
2810 /* Set protection. */
2811 if (flags & SEC_LOAD)
2812 {
2813 if (flags & SEC_CODE)
2814 seg->initprot |= BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_EXECUTE;
2815 if ((flags & (SEC_DATA | SEC_READONLY)) == SEC_DATA)
2816 seg->initprot |= BFD_MACH_O_PROT_WRITE | BFD_MACH_O_PROT_READ;
2817 }
2818
2819 /* Relocs shouldn't appear in non-object files. */
2820 if (s->bfdsection->reloc_count != 0)
2821 return FALSE;
2822 }
2823
2824 /* Set maxprot. */
2825 if (seg->initprot != 0)
2826 seg->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
2827 | BFD_MACH_O_PROT_EXECUTE;
2828 else
2829 seg->maxprot = 0;
2830
2831 /* Round segment size (and file size). */
2832 seg->vmsize = (seg->vmsize + pagemask) & ~pagemask;
2833 seg->filesize = (seg->filesize + pagemask) & ~pagemask;
2834 mdata->filelen = (mdata->filelen + pagemask) & ~pagemask;
2835
2836 return TRUE;
2837 }
2838
2839 /* Layout the commands: set commands size and offset, set ncmds and sizeofcmds
2840 fields in header. */
2841
2842 static void
2843 bfd_mach_o_layout_commands (bfd_mach_o_data_struct *mdata)
2844 {
2845 unsigned wide = mach_o_wide_p (&mdata->header);
2846 unsigned int hdrlen;
2847 ufile_ptr offset;
2848 bfd_mach_o_load_command *cmd;
2849 unsigned int align;
2850
2851 hdrlen = wide ? BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
2852 align = wide ? 8 - 1 : 4 - 1;
2853 offset = hdrlen;
2854 mdata->header.ncmds = 0;
2855
2856 for (cmd = mdata->first_command; cmd; cmd = cmd->next)
2857 {
2858 mdata->header.ncmds++;
2859 cmd->offset = offset;
2860
2861 switch (cmd->type)
2862 {
2863 case BFD_MACH_O_LC_SEGMENT_64:
2864 cmd->len = BFD_MACH_O_LC_SEGMENT_64_SIZE
2865 + BFD_MACH_O_SECTION_64_SIZE * cmd->command.segment.nsects;
2866 break;
2867 case BFD_MACH_O_LC_SEGMENT:
2868 cmd->len = BFD_MACH_O_LC_SEGMENT_SIZE
2869 + BFD_MACH_O_SECTION_SIZE * cmd->command.segment.nsects;
2870 break;
2871 case BFD_MACH_O_LC_SYMTAB:
2872 cmd->len = sizeof (struct mach_o_symtab_command_external)
2873 + BFD_MACH_O_LC_SIZE;
2874 break;
2875 case BFD_MACH_O_LC_DYSYMTAB:
2876 cmd->len = sizeof (struct mach_o_dysymtab_command_external)
2877 + BFD_MACH_O_LC_SIZE;
2878 break;
2879 case BFD_MACH_O_LC_LOAD_DYLIB:
2880 cmd->len = sizeof (struct mach_o_dylib_command_external)
2881 + BFD_MACH_O_LC_SIZE;
2882 cmd->command.dylib.name_offset = cmd->len;
2883 cmd->len += strlen (cmd->command.dylib.name_str);
2884 cmd->len = (cmd->len + align) & ~align;
2885 break;
2886 case BFD_MACH_O_LC_LOAD_DYLINKER:
2887 cmd->len = sizeof (struct mach_o_str_command_external)
2888 + BFD_MACH_O_LC_SIZE;
2889 cmd->command.dylinker.name_offset = cmd->len;
2890 cmd->len += strlen (cmd->command.dylinker.name_str);
2891 cmd->len = (cmd->len + align) & ~align;
2892 break;
2893 case BFD_MACH_O_LC_MAIN:
2894 cmd->len = sizeof (struct mach_o_entry_point_command_external)
2895 + BFD_MACH_O_LC_SIZE;
2896 break;
2897 case BFD_MACH_O_LC_DYLD_INFO:
2898 cmd->len = sizeof (struct mach_o_dyld_info_command_external)
2899 + BFD_MACH_O_LC_SIZE;
2900 break;
2901 default:
2902 (*_bfd_error_handler)
2903 (_("unable to layout unknown load command 0x%lx"),
2904 (unsigned long) cmd->type);
2905 break;
2906 }
2907
2908 BFD_ASSERT (cmd->len % (align + 1) == 0);
2909 offset += cmd->len;
2910 }
2911 mdata->header.sizeofcmds = offset - hdrlen;
2912 mdata->filelen = offset;
2913 }
2914
2915 /* Subroutine of bfd_mach_o_build_commands: set type, name and nsects of a
2916 segment. */
2917
2918 static void
2919 bfd_mach_o_init_segment (bfd_mach_o_data_struct *mdata,
2920 bfd_mach_o_load_command *cmd,
2921 const char *segname, unsigned int nbr_sect)
2922 {
2923 bfd_mach_o_segment_command *seg = &cmd->command.segment;
2924 unsigned wide = mach_o_wide_p (&mdata->header);
2925
2926 /* Init segment command. */
2927 cmd->type = wide ? BFD_MACH_O_LC_SEGMENT_64 : BFD_MACH_O_LC_SEGMENT;
2928 cmd->type_required = FALSE;
2929
2930 strcpy (seg->segname, segname);
2931 seg->nsects = nbr_sect;
2932
2933 seg->vmaddr = 0;
2934 seg->vmsize = 0;
2935
2936 seg->fileoff = 0;
2937 seg->filesize = 0;
2938 seg->maxprot = 0;
2939 seg->initprot = 0;
2940 seg->flags = 0;
2941 seg->sect_head = NULL;
2942 seg->sect_tail = NULL;
2943 }
2944
2945 /* Build Mach-O load commands (currently assuming an MH_OBJECT file).
2946 TODO: Other file formats, rebuilding symtab/dysymtab commands for strip
2947 and copy functionality. */
2948
2949 bfd_boolean
2950 bfd_mach_o_build_commands (bfd *abfd)
2951 {
2952 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2953 unsigned wide = mach_o_wide_p (&mdata->header);
2954 unsigned int nbr_segcmd = 0;
2955 bfd_mach_o_load_command *commands;
2956 unsigned int nbr_commands;
2957 int symtab_idx = -1;
2958 int dysymtab_idx = -1;
2959 int main_idx = -1;
2960 unsigned int i;
2961
2962 /* Return now if already built. */
2963 if (mdata->header.ncmds != 0)
2964 return TRUE;
2965
2966 /* Fill in the file type, if not already set. */
2967 if (mdata->header.filetype == 0)
2968 {
2969 if (abfd->flags & EXEC_P)
2970 mdata->header.filetype = BFD_MACH_O_MH_EXECUTE;
2971 else if (abfd->flags & DYNAMIC)
2972 mdata->header.filetype = BFD_MACH_O_MH_DYLIB;
2973 else
2974 mdata->header.filetype = BFD_MACH_O_MH_OBJECT;
2975 }
2976
2977 /* If hasn't already been done, flatten sections list, and sort
2978 if/when required. Must be done before the symbol table is adjusted,
2979 since that depends on properly numbered sections. */
2980 if (mdata->nsects == 0 || mdata->sections == NULL)
2981 if (! bfd_mach_o_mangle_sections (abfd, mdata))
2982 return FALSE;
2983
2984 /* Order the symbol table, fill-in/check mach-o specific fields and
2985 partition out any indirect symbols. */
2986 if (!bfd_mach_o_mangle_symbols (abfd))
2987 return FALSE;
2988
2989 /* Segment commands. */
2990 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT)
2991 {
2992 /* Only one segment for all the sections. But the segment is
2993 optional if there is no sections. */
2994 nbr_segcmd = (mdata->nsects > 0) ? 1 : 0;
2995 }
2996 else
2997 {
2998 bfd_mach_o_section *prev_sect = NULL;
2999
3000 /* One pagezero segment and one linkedit segment. */
3001 nbr_segcmd = 2;
3002
3003 /* Create one segment for associated segment name in sections.
3004 Assume that sections with the same segment name are consecutive. */
3005 for (i = 0; i < mdata->nsects; i++)
3006 {
3007 bfd_mach_o_section *this_sect = mdata->sections[i];
3008
3009 if (prev_sect == NULL
3010 || strcmp (prev_sect->segname, this_sect->segname) != 0)
3011 {
3012 nbr_segcmd++;
3013 prev_sect = this_sect;
3014 }
3015 }
3016 }
3017
3018 nbr_commands = nbr_segcmd;
3019
3020 /* One command for the symbol table (only if there are symbols. */
3021 if (bfd_get_symcount (abfd) > 0)
3022 symtab_idx = nbr_commands++;
3023
3024 /* FIXME:
3025 This is a rather crude test for whether we should build a dysymtab. */
3026 if (bfd_mach_o_should_emit_dysymtab ()
3027 && bfd_get_symcount (abfd))
3028 {
3029 /* If there should be a case where a dysymtab could be emitted without
3030 a symtab (seems improbable), this would need amending. */
3031 dysymtab_idx = nbr_commands++;
3032 }
3033
3034 /* Add an entry point command. */
3035 if (mdata->header.filetype == BFD_MACH_O_MH_EXECUTE
3036 && bfd_get_start_address (abfd) != 0)
3037 main_idx = nbr_commands++;
3038
3039 /* Well, we must have a header, at least. */
3040 mdata->filelen = wide ? BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
3041
3042 /* A bit unusual, but no content is valid;
3043 as -n empty.s -o empty.o */
3044 if (nbr_commands == 0)
3045 {
3046 /* Layout commands (well none...) and set headers command fields. */
3047 bfd_mach_o_layout_commands (mdata);
3048 return TRUE;
3049 }
3050
3051 /* Create commands for segments (and symtabs), prepend them. */
3052 commands = bfd_zalloc (abfd, nbr_commands * sizeof (bfd_mach_o_load_command));
3053 if (commands == NULL)
3054 return FALSE;
3055 for (i = 0; i < nbr_commands - 1; i++)
3056 commands[i].next = &commands[i + 1];
3057 commands[nbr_commands - 1].next = mdata->first_command;
3058 if (mdata->first_command == NULL)
3059 mdata->last_command = &commands[nbr_commands - 1];
3060 mdata->first_command = &commands[0];
3061
3062 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT && nbr_segcmd != 0)
3063 {
3064 /* For object file, there is only one segment. */
3065 bfd_mach_o_init_segment (mdata, &commands[0], "", mdata->nsects);
3066 }
3067 else if (nbr_segcmd != 0)
3068 {
3069 bfd_mach_o_load_command *cmd;
3070
3071 BFD_ASSERT (nbr_segcmd >= 2);
3072
3073 /* The pagezero. */
3074 cmd = &commands[0];
3075 bfd_mach_o_init_segment (mdata, cmd, "__PAGEZERO", 0);
3076
3077 /* Segments from sections. */
3078 cmd++;
3079 for (i = 0; i < mdata->nsects;)
3080 {
3081 const char *segname = mdata->sections[i]->segname;
3082 unsigned int nbr_sect = 1;
3083
3084 /* Count number of sections for this segment. */
3085 for (i++; i < mdata->nsects; i++)
3086 if (strcmp (mdata->sections[i]->segname, segname) == 0)
3087 nbr_sect++;
3088 else
3089 break;
3090
3091 bfd_mach_o_init_segment (mdata, cmd, segname, nbr_sect);
3092 cmd++;
3093 }
3094
3095 /* The linkedit. */
3096 bfd_mach_o_init_segment (mdata, cmd, "__LINKEDIT", 0);
3097 }
3098
3099 if (symtab_idx >= 0)
3100 {
3101 /* Init symtab command. */
3102 bfd_mach_o_load_command *cmd = &commands[symtab_idx];
3103
3104 cmd->type = BFD_MACH_O_LC_SYMTAB;
3105 cmd->type_required = FALSE;
3106 }
3107
3108 /* If required, setup symtab command, see comment above about the quality
3109 of this test. */
3110 if (dysymtab_idx >= 0)
3111 {
3112 bfd_mach_o_load_command *cmd = &commands[dysymtab_idx];
3113
3114 cmd->type = BFD_MACH_O_LC_DYSYMTAB;
3115 cmd->type_required = FALSE;
3116 }
3117
3118 /* Create the main command. */
3119 if (main_idx >= 0)
3120 {
3121 bfd_mach_o_load_command *cmd = &commands[main_idx];
3122
3123 cmd->type = BFD_MACH_O_LC_MAIN;
3124 cmd->type_required = TRUE;
3125
3126 cmd->command.main.entryoff = 0;
3127 cmd->command.main.stacksize = 0;
3128 }
3129
3130 /* Layout commands. */
3131 bfd_mach_o_layout_commands (mdata);
3132
3133 /* So, now we have sized the commands and the filelen set to that.
3134 Now we can build the segment command and set the section file offsets. */
3135 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT)
3136 {
3137 for (i = 0; i < nbr_segcmd; i++)
3138 if (!bfd_mach_o_build_obj_seg_command
3139 (abfd, &commands[i].command.segment))
3140 return FALSE;
3141 }
3142 else
3143 {
3144 bfd_vma maxvma = 0;
3145
3146 /* Skip pagezero and linkedit segments. */
3147 for (i = 1; i < nbr_segcmd - 1; i++)
3148 {
3149 bfd_mach_o_segment_command *seg = &commands[i].command.segment;
3150
3151 if (!bfd_mach_o_build_exec_seg_command (abfd, seg))
3152 return FALSE;
3153
3154 if (seg->vmaddr + seg->vmsize > maxvma)
3155 maxvma = seg->vmaddr + seg->vmsize;
3156 }
3157
3158 /* Set the size of __PAGEZERO. */
3159 commands[0].command.segment.vmsize =
3160 commands[1].command.segment.vmaddr;
3161
3162 /* Set the vma and fileoff of __LINKEDIT. */
3163 commands[nbr_segcmd - 1].command.segment.vmaddr = maxvma;
3164 commands[nbr_segcmd - 1].command.segment.fileoff = mdata->filelen;
3165
3166 /* Set entry point (once segments have been laid out). */
3167 if (main_idx >= 0)
3168 commands[main_idx].command.main.entryoff =
3169 bfd_get_start_address (abfd) - commands[1].command.segment.vmaddr;
3170 }
3171
3172 return TRUE;
3173 }
3174
3175 /* Set the contents of a section. */
3176
3177 bfd_boolean
3178 bfd_mach_o_set_section_contents (bfd *abfd,
3179 asection *section,
3180 const void * location,
3181 file_ptr offset,
3182 bfd_size_type count)
3183 {
3184 file_ptr pos;
3185
3186 /* Trying to write the first section contents will trigger the creation of
3187 the load commands if they are not already present. */
3188 if (!abfd->output_has_begun && !bfd_mach_o_build_commands (abfd))
3189 return FALSE;
3190
3191 if (count == 0)
3192 return TRUE;
3193
3194 pos = section->filepos + offset;
3195 if (bfd_seek (abfd, pos, SEEK_SET) != 0
3196 || bfd_bwrite (location, count, abfd) != count)
3197 return FALSE;
3198
3199 return TRUE;
3200 }
3201
3202 int
3203 bfd_mach_o_sizeof_headers (bfd *a ATTRIBUTE_UNUSED,
3204 struct bfd_link_info *info ATTRIBUTE_UNUSED)
3205 {
3206 return 0;
3207 }
3208
3209 /* Make an empty symbol. This is required only because
3210 bfd_make_section_anyway wants to create a symbol for the section. */
3211
3212 asymbol *
3213 bfd_mach_o_make_empty_symbol (bfd *abfd)
3214 {
3215 asymbol *new_symbol;
3216
3217 new_symbol = bfd_zalloc (abfd, sizeof (bfd_mach_o_asymbol));
3218 if (new_symbol == NULL)
3219 return new_symbol;
3220 new_symbol->the_bfd = abfd;
3221 new_symbol->udata.i = SYM_MACHO_FIELDS_UNSET;
3222 return new_symbol;
3223 }
3224
3225 static bfd_boolean
3226 bfd_mach_o_read_header (bfd *abfd, bfd_mach_o_header *header)
3227 {
3228 struct mach_o_header_external raw;
3229 unsigned int size;
3230 bfd_vma (*get32) (const void *) = NULL;
3231
3232 /* Just read the magic number. */
3233 if (bfd_seek (abfd, 0, SEEK_SET) != 0
3234 || bfd_bread (raw.magic, sizeof (raw.magic), abfd) != 4)
3235 return FALSE;
3236
3237 if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC)
3238 {
3239 header->byteorder = BFD_ENDIAN_BIG;
3240 header->magic = BFD_MACH_O_MH_MAGIC;
3241 header->version = 1;
3242 get32 = bfd_getb32;
3243 }
3244 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC)
3245 {
3246 header->byteorder = BFD_ENDIAN_LITTLE;
3247 header->magic = BFD_MACH_O_MH_MAGIC;
3248 header->version = 1;
3249 get32 = bfd_getl32;
3250 }
3251 else if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64)
3252 {
3253 header->byteorder = BFD_ENDIAN_BIG;
3254 header->magic = BFD_MACH_O_MH_MAGIC_64;
3255 header->version = 2;
3256 get32 = bfd_getb32;
3257 }
3258 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64)
3259 {
3260 header->byteorder = BFD_ENDIAN_LITTLE;
3261 header->magic = BFD_MACH_O_MH_MAGIC_64;
3262 header->version = 2;
3263 get32 = bfd_getl32;
3264 }
3265 else
3266 {
3267 header->byteorder = BFD_ENDIAN_UNKNOWN;
3268 return FALSE;
3269 }
3270
3271 /* Once the size of the header is known, read the full header. */
3272 size = mach_o_wide_p (header) ?
3273 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
3274
3275 if (bfd_seek (abfd, 0, SEEK_SET) != 0
3276 || bfd_bread (&raw, size, abfd) != size)
3277 return FALSE;
3278
3279 header->cputype = (*get32) (raw.cputype);
3280 header->cpusubtype = (*get32) (raw.cpusubtype);
3281 header->filetype = (*get32) (raw.filetype);
3282 header->ncmds = (*get32) (raw.ncmds);
3283 header->sizeofcmds = (*get32) (raw.sizeofcmds);
3284 header->flags = (*get32) (raw.flags);
3285
3286 if (mach_o_wide_p (header))
3287 header->reserved = (*get32) (raw.reserved);
3288 else
3289 header->reserved = 0;
3290
3291 return TRUE;
3292 }
3293
3294 bfd_boolean
3295 bfd_mach_o_new_section_hook (bfd *abfd, asection *sec)
3296 {
3297 bfd_mach_o_section *s;
3298 unsigned bfdalign = bfd_get_section_alignment (abfd, sec);
3299
3300 s = bfd_mach_o_get_mach_o_section (sec);
3301 if (s == NULL)
3302 {
3303 flagword bfd_flags;
3304 static const mach_o_section_name_xlat * xlat;
3305
3306 s = (bfd_mach_o_section *) bfd_zalloc (abfd, sizeof (*s));
3307 if (s == NULL)
3308 return FALSE;
3309 sec->used_by_bfd = s;
3310 s->bfdsection = sec;
3311
3312 /* Create the Darwin seg/sect name pair from the bfd name.
3313 If this is a canonical name for which a specific paiting exists
3314 there will also be defined flags, type, attribute and alignment
3315 values. */
3316 xlat = bfd_mach_o_convert_section_name_to_mach_o (abfd, sec, s);
3317 if (xlat != NULL)
3318 {
3319 s->flags = xlat->macho_sectype | xlat->macho_secattr;
3320 s->align = xlat->sectalign > bfdalign ? xlat->sectalign
3321 : bfdalign;
3322 (void) bfd_set_section_alignment (abfd, sec, s->align);
3323 bfd_flags = bfd_get_section_flags (abfd, sec);
3324 if (bfd_flags == SEC_NO_FLAGS)
3325 bfd_set_section_flags (abfd, sec, xlat->bfd_flags);
3326 }
3327 else
3328 /* Create default flags. */
3329 bfd_mach_o_set_section_flags_from_bfd (abfd, sec);
3330 }
3331
3332 return _bfd_generic_new_section_hook (abfd, sec);
3333 }
3334
3335 static void
3336 bfd_mach_o_init_section_from_mach_o (bfd *abfd, asection *sec,
3337 unsigned long prot)
3338 {
3339 flagword flags;
3340 bfd_mach_o_section *section;
3341
3342 flags = bfd_get_section_flags (abfd, sec);
3343 section = bfd_mach_o_get_mach_o_section (sec);
3344
3345 /* TODO: see if we should use the xlat system for doing this by
3346 preference and fall back to this for unknown sections. */
3347
3348 if (flags == SEC_NO_FLAGS)
3349 {
3350 /* Try to guess flags. */
3351 if (section->flags & BFD_MACH_O_S_ATTR_DEBUG)
3352 flags = SEC_DEBUGGING;
3353 else
3354 {
3355 flags = SEC_ALLOC;
3356 if ((section->flags & BFD_MACH_O_SECTION_TYPE_MASK)
3357 != BFD_MACH_O_S_ZEROFILL)
3358 {
3359 flags |= SEC_LOAD;
3360 if (prot & BFD_MACH_O_PROT_EXECUTE)
3361 flags |= SEC_CODE;
3362 if (prot & BFD_MACH_O_PROT_WRITE)
3363 flags |= SEC_DATA;
3364 else if (prot & BFD_MACH_O_PROT_READ)
3365 flags |= SEC_READONLY;
3366 }
3367 }
3368 }
3369 else
3370 {
3371 if ((flags & SEC_DEBUGGING) == 0)
3372 flags |= SEC_ALLOC;
3373 }
3374
3375 if (section->offset != 0)
3376 flags |= SEC_HAS_CONTENTS;
3377 if (section->nreloc != 0)
3378 flags |= SEC_RELOC;
3379
3380 bfd_set_section_flags (abfd, sec, flags);
3381
3382 sec->vma = section->addr;
3383 sec->lma = section->addr;
3384 sec->size = section->size;
3385 sec->filepos = section->offset;
3386 sec->alignment_power = section->align;
3387 sec->segment_mark = 0;
3388 sec->reloc_count = section->nreloc;
3389 sec->rel_filepos = section->reloff;
3390 }
3391
3392 static asection *
3393 bfd_mach_o_make_bfd_section (bfd *abfd,
3394 const unsigned char *segname,
3395 const unsigned char *sectname)
3396 {
3397 const char *sname;
3398 flagword flags;
3399
3400 bfd_mach_o_convert_section_name_to_bfd
3401 (abfd, (const char *)segname, (const char *)sectname, &sname, &flags);
3402 if (sname == NULL)
3403 return NULL;
3404
3405 return bfd_make_section_anyway_with_flags (abfd, sname, flags);
3406 }
3407
3408 static asection *
3409 bfd_mach_o_read_section_32 (bfd *abfd,
3410 unsigned int offset,
3411 unsigned long prot)
3412 {
3413 struct mach_o_section_32_external raw;
3414 asection *sec;
3415 bfd_mach_o_section *section;
3416
3417 if (bfd_seek (abfd, offset, SEEK_SET) != 0
3418 || (bfd_bread (&raw, BFD_MACH_O_SECTION_SIZE, abfd)
3419 != BFD_MACH_O_SECTION_SIZE))
3420 return NULL;
3421
3422 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname);
3423 if (sec == NULL)
3424 return NULL;
3425
3426 section = bfd_mach_o_get_mach_o_section (sec);
3427 memcpy (section->segname, raw.segname, sizeof (raw.segname));
3428 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0;
3429 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname));
3430 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0;
3431 section->addr = bfd_h_get_32 (abfd, raw.addr);
3432 section->size = bfd_h_get_32 (abfd, raw.size);
3433 section->offset = bfd_h_get_32 (abfd, raw.offset);
3434 section->align = bfd_h_get_32 (abfd, raw.align);
3435 section->reloff = bfd_h_get_32 (abfd, raw.reloff);
3436 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc);
3437 section->flags = bfd_h_get_32 (abfd, raw.flags);
3438 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1);
3439 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2);
3440 section->reserved3 = 0;
3441
3442 bfd_mach_o_init_section_from_mach_o (abfd, sec, prot);
3443
3444 return sec;
3445 }
3446
3447 static asection *
3448 bfd_mach_o_read_section_64 (bfd *abfd,
3449 unsigned int offset,
3450 unsigned long prot)
3451 {
3452 struct mach_o_section_64_external raw;
3453 asection *sec;
3454 bfd_mach_o_section *section;
3455
3456 if (bfd_seek (abfd, offset, SEEK_SET) != 0
3457 || (bfd_bread (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd)
3458 != BFD_MACH_O_SECTION_64_SIZE))
3459 return NULL;
3460
3461 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname);
3462 if (sec == NULL)
3463 return NULL;
3464
3465 section = bfd_mach_o_get_mach_o_section (sec);
3466 memcpy (section->segname, raw.segname, sizeof (raw.segname));
3467 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0;
3468 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname));
3469 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0;
3470 section->addr = bfd_h_get_64 (abfd, raw.addr);
3471 section->size = bfd_h_get_64 (abfd, raw.size);
3472 section->offset = bfd_h_get_32 (abfd, raw.offset);
3473 section->align = bfd_h_get_32 (abfd, raw.align);
3474 section->reloff = bfd_h_get_32 (abfd, raw.reloff);
3475 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc);
3476 section->flags = bfd_h_get_32 (abfd, raw.flags);
3477 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1);
3478 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2);
3479 section->reserved3 = bfd_h_get_32 (abfd, raw.reserved3);
3480
3481 bfd_mach_o_init_section_from_mach_o (abfd, sec, prot);
3482
3483 return sec;
3484 }
3485
3486 static asection *
3487 bfd_mach_o_read_section (bfd *abfd,
3488 unsigned int offset,
3489 unsigned long prot,
3490 unsigned int wide)
3491 {
3492 if (wide)
3493 return bfd_mach_o_read_section_64 (abfd, offset, prot);
3494 else
3495 return bfd_mach_o_read_section_32 (abfd, offset, prot);
3496 }
3497
3498 static bfd_boolean
3499 bfd_mach_o_read_symtab_symbol (bfd *abfd,
3500 bfd_mach_o_symtab_command *sym,
3501 bfd_mach_o_asymbol *s,
3502 unsigned long i)
3503 {
3504 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3505 unsigned int wide = mach_o_wide_p (&mdata->header);
3506 unsigned int symwidth =
3507 wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE;
3508 unsigned int symoff = sym->symoff + (i * symwidth);
3509 struct mach_o_nlist_64_external raw;
3510 unsigned char type = -1;
3511 unsigned char section = -1;
3512 short desc = -1;
3513 symvalue value = -1;
3514 unsigned long stroff = -1;
3515 unsigned int symtype = -1;
3516
3517 BFD_ASSERT (sym->strtab != NULL);
3518
3519 if (bfd_seek (abfd, symoff, SEEK_SET) != 0
3520 || bfd_bread (&raw, symwidth, abfd) != symwidth)
3521 {
3522 (*_bfd_error_handler)
3523 (_("bfd_mach_o_read_symtab_symbol: unable to read %d bytes at %lu"),
3524 symwidth, (unsigned long) symoff);
3525 return FALSE;
3526 }
3527
3528 stroff = bfd_h_get_32 (abfd, raw.n_strx);
3529 type = bfd_h_get_8 (abfd, raw.n_type);
3530 symtype = type & BFD_MACH_O_N_TYPE;
3531 section = bfd_h_get_8 (abfd, raw.n_sect);
3532 desc = bfd_h_get_16 (abfd, raw.n_desc);
3533 if (wide)
3534 value = bfd_h_get_64 (abfd, raw.n_value);
3535 else
3536 value = bfd_h_get_32 (abfd, raw.n_value);
3537
3538 if (stroff >= sym->strsize)
3539 {
3540 (*_bfd_error_handler)
3541 (_("bfd_mach_o_read_symtab_symbol: name out of range (%lu >= %lu)"),
3542 (unsigned long) stroff,
3543 (unsigned long) sym->strsize);
3544 return FALSE;
3545 }
3546
3547 s->symbol.the_bfd = abfd;
3548 s->symbol.name = sym->strtab + stroff;
3549 s->symbol.value = value;
3550 s->symbol.flags = 0x0;
3551 s->symbol.udata.i = i;
3552 s->n_type = type;
3553 s->n_sect = section;
3554 s->n_desc = desc;
3555
3556 if (type & BFD_MACH_O_N_STAB)
3557 {
3558 s->symbol.flags |= BSF_DEBUGGING;
3559 s->symbol.section = bfd_und_section_ptr;
3560 switch (type)
3561 {
3562 case N_FUN:
3563 case N_STSYM:
3564 case N_LCSYM:
3565 case N_BNSYM:
3566 case N_SLINE:
3567 case N_ENSYM:
3568 case N_ECOMM:
3569 case N_ECOML:
3570 case N_GSYM:
3571 if ((section > 0) && (section <= mdata->nsects))
3572 {
3573 s->symbol.section = mdata->sections[section - 1]->bfdsection;
3574 s->symbol.value =
3575 s->symbol.value - mdata->sections[section - 1]->addr;
3576 }
3577 break;
3578 }
3579 }
3580 else
3581 {
3582 if (type & (BFD_MACH_O_N_PEXT | BFD_MACH_O_N_EXT))
3583 s->symbol.flags |= BSF_GLOBAL;
3584 else
3585 s->symbol.flags |= BSF_LOCAL;
3586
3587 switch (symtype)
3588 {
3589 case BFD_MACH_O_N_UNDF:
3590 if (type == (BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT)
3591 && s->symbol.value != 0)
3592 {
3593 /* A common symbol. */
3594 s->symbol.section = bfd_com_section_ptr;
3595 s->symbol.flags = BSF_NO_FLAGS;
3596 }
3597 else
3598 {
3599 s->symbol.section = bfd_und_section_ptr;
3600 if (s->n_desc & BFD_MACH_O_N_WEAK_REF)
3601 s->symbol.flags |= BSF_WEAK;
3602 }
3603 break;
3604 case BFD_MACH_O_N_PBUD:
3605 s->symbol.section = bfd_und_section_ptr;
3606 break;
3607 case BFD_MACH_O_N_ABS:
3608 s->symbol.section = bfd_abs_section_ptr;
3609 break;
3610 case BFD_MACH_O_N_SECT:
3611 if ((section > 0) && (section <= mdata->nsects))
3612 {
3613 s->symbol.section = mdata->sections[section - 1]->bfdsection;
3614 s->symbol.value =
3615 s->symbol.value - mdata->sections[section - 1]->addr;
3616 }
3617 else
3618 {
3619 /* Mach-O uses 0 to mean "no section"; not an error. */
3620 if (section != 0)
3621 {
3622 (*_bfd_error_handler) (_("bfd_mach_o_read_symtab_symbol: "
3623 "symbol \"%s\" specified invalid section %d (max %lu): setting to undefined"),
3624 s->symbol.name, section, mdata->nsects);
3625 }
3626 s->symbol.section = bfd_und_section_ptr;
3627 }
3628 break;
3629 case BFD_MACH_O_N_INDR:
3630 /* FIXME: we don't follow the BFD convention as this indirect symbol
3631 won't be followed by the referenced one. This looks harmless
3632 unless we start using the linker. */
3633 s->symbol.flags |= BSF_INDIRECT;
3634 s->symbol.section = bfd_ind_section_ptr;
3635 s->symbol.value = 0;
3636 break;
3637 default:
3638 (*_bfd_error_handler) (_("bfd_mach_o_read_symtab_symbol: "
3639 "symbol \"%s\" specified invalid type field 0x%x: setting to undefined"),
3640 s->symbol.name, symtype);
3641 s->symbol.section = bfd_und_section_ptr;
3642 break;
3643 }
3644 }
3645
3646 return TRUE;
3647 }
3648
3649 bfd_boolean
3650 bfd_mach_o_read_symtab_strtab (bfd *abfd)
3651 {
3652 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3653 bfd_mach_o_symtab_command *sym = mdata->symtab;
3654
3655 /* Fail if there is no symtab. */
3656 if (sym == NULL)
3657 return FALSE;
3658
3659 /* Success if already loaded. */
3660 if (sym->strtab)
3661 return TRUE;
3662
3663 if (abfd->flags & BFD_IN_MEMORY)
3664 {
3665 struct bfd_in_memory *b;
3666
3667 b = (struct bfd_in_memory *) abfd->iostream;
3668
3669 if ((sym->stroff + sym->strsize) > b->size)
3670 {
3671 bfd_set_error (bfd_error_file_truncated);
3672 return FALSE;
3673 }
3674 sym->strtab = (char *) b->buffer + sym->stroff;
3675 }
3676 else
3677 {
3678 sym->strtab = bfd_alloc (abfd, sym->strsize);
3679 if (sym->strtab == NULL)
3680 return FALSE;
3681
3682 if (bfd_seek (abfd, sym->stroff, SEEK_SET) != 0
3683 || bfd_bread (sym->strtab, sym->strsize, abfd) != sym->strsize)
3684 {
3685 /* PR 17512: file: 10888-1609-0.004. */
3686 bfd_release (abfd, sym->strtab);
3687 sym->strtab = NULL;
3688 bfd_set_error (bfd_error_file_truncated);
3689 return FALSE;
3690 }
3691 }
3692
3693 return TRUE;
3694 }
3695
3696 bfd_boolean
3697 bfd_mach_o_read_symtab_symbols (bfd *abfd)
3698 {
3699 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3700 bfd_mach_o_symtab_command *sym = mdata->symtab;
3701 unsigned long i;
3702
3703 if (sym == NULL || sym->symbols)
3704 /* Return now if there are no symbols or if already loaded. */
3705 return TRUE;
3706
3707 sym->symbols = bfd_alloc (abfd, sym->nsyms * sizeof (bfd_mach_o_asymbol));
3708
3709 if (sym->symbols == NULL)
3710 {
3711 (*_bfd_error_handler) (_("bfd_mach_o_read_symtab_symbols: unable to allocate memory for symbols"));
3712 return FALSE;
3713 }
3714
3715 if (!bfd_mach_o_read_symtab_strtab (abfd))
3716 {
3717 bfd_release (abfd, sym->symbols);
3718 sym->symbols = NULL;
3719 return FALSE;
3720 }
3721
3722 for (i = 0; i < sym->nsyms; i++)
3723 {
3724 if (!bfd_mach_o_read_symtab_symbol (abfd, sym, &sym->symbols[i], i))
3725 {
3726 bfd_release (abfd, sym->symbols);
3727 sym->symbols = NULL;
3728 return FALSE;
3729 }
3730 }
3731
3732 return TRUE;
3733 }
3734
3735 static const char *
3736 bfd_mach_o_i386_flavour_string (unsigned int flavour)
3737 {
3738 switch ((int) flavour)
3739 {
3740 case BFD_MACH_O_x86_THREAD_STATE32: return "x86_THREAD_STATE32";
3741 case BFD_MACH_O_x86_FLOAT_STATE32: return "x86_FLOAT_STATE32";
3742 case BFD_MACH_O_x86_EXCEPTION_STATE32: return "x86_EXCEPTION_STATE32";
3743 case BFD_MACH_O_x86_THREAD_STATE64: return "x86_THREAD_STATE64";
3744 case BFD_MACH_O_x86_FLOAT_STATE64: return "x86_FLOAT_STATE64";
3745 case BFD_MACH_O_x86_EXCEPTION_STATE64: return "x86_EXCEPTION_STATE64";
3746 case BFD_MACH_O_x86_THREAD_STATE: return "x86_THREAD_STATE";
3747 case BFD_MACH_O_x86_FLOAT_STATE: return "x86_FLOAT_STATE";
3748 case BFD_MACH_O_x86_EXCEPTION_STATE: return "x86_EXCEPTION_STATE";
3749 case BFD_MACH_O_x86_DEBUG_STATE32: return "x86_DEBUG_STATE32";
3750 case BFD_MACH_O_x86_DEBUG_STATE64: return "x86_DEBUG_STATE64";
3751 case BFD_MACH_O_x86_DEBUG_STATE: return "x86_DEBUG_STATE";
3752 case BFD_MACH_O_x86_THREAD_STATE_NONE: return "x86_THREAD_STATE_NONE";
3753 default: return "UNKNOWN";
3754 }
3755 }
3756
3757 static const char *
3758 bfd_mach_o_ppc_flavour_string (unsigned int flavour)
3759 {
3760 switch ((int) flavour)
3761 {
3762 case BFD_MACH_O_PPC_THREAD_STATE: return "PPC_THREAD_STATE";
3763 case BFD_MACH_O_PPC_FLOAT_STATE: return "PPC_FLOAT_STATE";
3764 case BFD_MACH_O_PPC_EXCEPTION_STATE: return "PPC_EXCEPTION_STATE";
3765 case BFD_MACH_O_PPC_VECTOR_STATE: return "PPC_VECTOR_STATE";
3766 case BFD_MACH_O_PPC_THREAD_STATE64: return "PPC_THREAD_STATE64";
3767 case BFD_MACH_O_PPC_EXCEPTION_STATE64: return "PPC_EXCEPTION_STATE64";
3768 default: return "UNKNOWN";
3769 }
3770 }
3771
3772 static bfd_boolean
3773 bfd_mach_o_read_dylinker (bfd *abfd, bfd_mach_o_load_command *command)
3774 {
3775 bfd_mach_o_dylinker_command *cmd = &command->command.dylinker;
3776 struct mach_o_str_command_external raw;
3777 unsigned int nameoff;
3778 unsigned int namelen;
3779
3780 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3781 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3782 return FALSE;
3783
3784 nameoff = bfd_h_get_32 (abfd, raw.str);
3785
3786 cmd->name_offset = nameoff;
3787 namelen = command->len - nameoff;
3788 nameoff += command->offset;
3789 cmd->name_str = bfd_alloc (abfd, namelen);
3790 if (cmd->name_str == NULL)
3791 return FALSE;
3792 if (bfd_seek (abfd, nameoff, SEEK_SET) != 0
3793 || bfd_bread (cmd->name_str, namelen, abfd) != namelen)
3794 return FALSE;
3795 return TRUE;
3796 }
3797
3798 static bfd_boolean
3799 bfd_mach_o_read_dylib (bfd *abfd, bfd_mach_o_load_command *command)
3800 {
3801 bfd_mach_o_dylib_command *cmd = &command->command.dylib;
3802 struct mach_o_dylib_command_external raw;
3803 unsigned int nameoff;
3804 unsigned int namelen;
3805
3806 switch (command->type)
3807 {
3808 case BFD_MACH_O_LC_LOAD_DYLIB:
3809 case BFD_MACH_O_LC_LAZY_LOAD_DYLIB:
3810 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
3811 case BFD_MACH_O_LC_ID_DYLIB:
3812 case BFD_MACH_O_LC_REEXPORT_DYLIB:
3813 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
3814 break;
3815 default:
3816 BFD_FAIL ();
3817 return FALSE;
3818 }
3819
3820 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3821 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3822 return FALSE;
3823
3824 nameoff = bfd_h_get_32 (abfd, raw.name);
3825 cmd->timestamp = bfd_h_get_32 (abfd, raw.timestamp);
3826 cmd->current_version = bfd_h_get_32 (abfd, raw.current_version);
3827 cmd->compatibility_version = bfd_h_get_32 (abfd, raw.compatibility_version);
3828
3829 cmd->name_offset = command->offset + nameoff;
3830 namelen = command->len - nameoff;
3831 cmd->name_str = bfd_alloc (abfd, namelen);
3832 if (cmd->name_str == NULL)
3833 return FALSE;
3834 if (bfd_seek (abfd, cmd->name_offset, SEEK_SET) != 0
3835 || bfd_bread (cmd->name_str, namelen, abfd) != namelen)
3836 return FALSE;
3837 return TRUE;
3838 }
3839
3840 static bfd_boolean
3841 bfd_mach_o_read_prebound_dylib (bfd *abfd,
3842 bfd_mach_o_load_command *command)
3843 {
3844 bfd_mach_o_prebound_dylib_command *cmd = &command->command.prebound_dylib;
3845 struct mach_o_prebound_dylib_command_external raw;
3846 unsigned int nameoff;
3847 unsigned int modoff;
3848 unsigned int str_len;
3849 unsigned char *str;
3850
3851 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3852 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3853 return FALSE;
3854
3855 nameoff = bfd_h_get_32 (abfd, raw.name);
3856 modoff = bfd_h_get_32 (abfd, raw.linked_modules);
3857 if (nameoff > command->len || modoff > command->len)
3858 return FALSE;
3859
3860 str_len = command->len - sizeof (raw);
3861 str = bfd_alloc (abfd, str_len);
3862 if (str == NULL)
3863 return FALSE;
3864 if (bfd_bread (str, str_len, abfd) != str_len)
3865 return FALSE;
3866
3867 cmd->name_offset = command->offset + nameoff;
3868 cmd->nmodules = bfd_h_get_32 (abfd, raw.nmodules);
3869 cmd->linked_modules_offset = command->offset + modoff;
3870
3871 cmd->name_str = (char *)str + nameoff - (sizeof (raw) + BFD_MACH_O_LC_SIZE);
3872 cmd->linked_modules = str + modoff - (sizeof (raw) + BFD_MACH_O_LC_SIZE);
3873 return TRUE;
3874 }
3875
3876 static bfd_boolean
3877 bfd_mach_o_read_prebind_cksum (bfd *abfd,
3878 bfd_mach_o_load_command *command)
3879 {
3880 bfd_mach_o_prebind_cksum_command *cmd = &command->command.prebind_cksum;
3881 struct mach_o_prebind_cksum_command_external raw;
3882
3883 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3884 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3885 return FALSE;
3886
3887 cmd->cksum = bfd_get_32 (abfd, raw.cksum);
3888 return TRUE;
3889 }
3890
3891 static bfd_boolean
3892 bfd_mach_o_read_twolevel_hints (bfd *abfd,
3893 bfd_mach_o_load_command *command)
3894 {
3895 bfd_mach_o_twolevel_hints_command *cmd = &command->command.twolevel_hints;
3896 struct mach_o_twolevel_hints_command_external raw;
3897
3898 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3899 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3900 return FALSE;
3901
3902 cmd->offset = bfd_get_32 (abfd, raw.offset);
3903 cmd->nhints = bfd_get_32 (abfd, raw.nhints);
3904 return TRUE;
3905 }
3906
3907 static bfd_boolean
3908 bfd_mach_o_read_fvmlib (bfd *abfd, bfd_mach_o_load_command *command)
3909 {
3910 bfd_mach_o_fvmlib_command *fvm = &command->command.fvmlib;
3911 struct mach_o_fvmlib_command_external raw;
3912 unsigned int nameoff;
3913 unsigned int namelen;
3914
3915 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3916 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3917 return FALSE;
3918
3919 nameoff = bfd_h_get_32 (abfd, raw.name);
3920 fvm->minor_version = bfd_h_get_32 (abfd, raw.minor_version);
3921 fvm->header_addr = bfd_h_get_32 (abfd, raw.header_addr);
3922
3923 fvm->name_offset = command->offset + nameoff;
3924 namelen = command->len - nameoff;
3925 fvm->name_str = bfd_alloc (abfd, namelen);
3926 if (fvm->name_str == NULL)
3927 return FALSE;
3928 if (bfd_seek (abfd, fvm->name_offset, SEEK_SET) != 0
3929 || bfd_bread (fvm->name_str, namelen, abfd) != namelen)
3930 return FALSE;
3931 return TRUE;
3932 }
3933
3934 static bfd_boolean
3935 bfd_mach_o_read_thread (bfd *abfd, bfd_mach_o_load_command *command)
3936 {
3937 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3938 bfd_mach_o_thread_command *cmd = &command->command.thread;
3939 unsigned int offset;
3940 unsigned int nflavours;
3941 unsigned int i;
3942
3943 BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD)
3944 || (command->type == BFD_MACH_O_LC_UNIXTHREAD));
3945
3946 /* Count the number of threads. */
3947 offset = 8;
3948 nflavours = 0;
3949 while (offset != command->len)
3950 {
3951 struct mach_o_thread_command_external raw;
3952
3953 if (offset >= command->len)
3954 return FALSE;
3955
3956 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
3957 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3958 return FALSE;
3959
3960 offset += sizeof (raw) + bfd_h_get_32 (abfd, raw.count) * 4;
3961 nflavours++;
3962 }
3963
3964 /* Allocate threads. */
3965 cmd->flavours = bfd_alloc
3966 (abfd, nflavours * sizeof (bfd_mach_o_thread_flavour));
3967 if (cmd->flavours == NULL)
3968 return FALSE;
3969 cmd->nflavours = nflavours;
3970
3971 offset = 8;
3972 nflavours = 0;
3973 while (offset != command->len)
3974 {
3975 struct mach_o_thread_command_external raw;
3976
3977 if (offset >= command->len)
3978 return FALSE;
3979
3980 if (nflavours >= cmd->nflavours)
3981 return FALSE;
3982
3983 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
3984 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3985 return FALSE;
3986
3987 cmd->flavours[nflavours].flavour = bfd_h_get_32 (abfd, raw.flavour);
3988 cmd->flavours[nflavours].offset = command->offset + offset + sizeof (raw);
3989 cmd->flavours[nflavours].size = bfd_h_get_32 (abfd, raw.count) * 4;
3990 offset += cmd->flavours[nflavours].size + sizeof (raw);
3991 nflavours++;
3992 }
3993
3994 for (i = 0; i < nflavours; i++)
3995 {
3996 asection *bfdsec;
3997 unsigned int snamelen;
3998 char *sname;
3999 const char *flavourstr;
4000 const char *prefix = "LC_THREAD";
4001 unsigned int j = 0;
4002
4003 switch (mdata->header.cputype)
4004 {
4005 case BFD_MACH_O_CPU_TYPE_POWERPC:
4006 case BFD_MACH_O_CPU_TYPE_POWERPC_64:
4007 flavourstr =
4008 bfd_mach_o_ppc_flavour_string (cmd->flavours[i].flavour);
4009 break;
4010 case BFD_MACH_O_CPU_TYPE_I386:
4011 case BFD_MACH_O_CPU_TYPE_X86_64:
4012 flavourstr =
4013 bfd_mach_o_i386_flavour_string (cmd->flavours[i].flavour);
4014 break;
4015 default:
4016 flavourstr = "UNKNOWN_ARCHITECTURE";
4017 break;
4018 }
4019
4020 snamelen = strlen (prefix) + 1 + 20 + 1 + strlen (flavourstr) + 1;
4021 sname = bfd_alloc (abfd, snamelen);
4022 if (sname == NULL)
4023 return FALSE;
4024
4025 for (;;)
4026 {
4027 sprintf (sname, "%s.%s.%u", prefix, flavourstr, j);
4028 if (bfd_get_section_by_name (abfd, sname) == NULL)
4029 break;
4030 j++;
4031 }
4032
4033 bfdsec = bfd_make_section_with_flags (abfd, sname, SEC_HAS_CONTENTS);
4034
4035 bfdsec->vma = 0;
4036 bfdsec->lma = 0;
4037 bfdsec->size = cmd->flavours[i].size;
4038 bfdsec->filepos = cmd->flavours[i].offset;
4039 bfdsec->alignment_power = 0x0;
4040
4041 cmd->section = bfdsec;
4042 }
4043
4044 return TRUE;
4045 }
4046
4047 static bfd_boolean
4048 bfd_mach_o_read_dysymtab (bfd *abfd, bfd_mach_o_load_command *command)
4049 {
4050 bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab;
4051 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4052
4053 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB);
4054
4055 {
4056 struct mach_o_dysymtab_command_external raw;
4057
4058 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4059 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4060 return FALSE;
4061
4062 cmd->ilocalsym = bfd_h_get_32 (abfd, raw.ilocalsym);
4063 cmd->nlocalsym = bfd_h_get_32 (abfd, raw.nlocalsym);
4064 cmd->iextdefsym = bfd_h_get_32 (abfd, raw.iextdefsym);
4065 cmd->nextdefsym = bfd_h_get_32 (abfd, raw.nextdefsym);
4066 cmd->iundefsym = bfd_h_get_32 (abfd, raw.iundefsym);
4067 cmd->nundefsym = bfd_h_get_32 (abfd, raw.nundefsym);
4068 cmd->tocoff = bfd_h_get_32 (abfd, raw.tocoff);
4069 cmd->ntoc = bfd_h_get_32 (abfd, raw.ntoc);
4070 cmd->modtaboff = bfd_h_get_32 (abfd, raw.modtaboff);
4071 cmd->nmodtab = bfd_h_get_32 (abfd, raw.nmodtab);
4072 cmd->extrefsymoff = bfd_h_get_32 (abfd, raw.extrefsymoff);
4073 cmd->nextrefsyms = bfd_h_get_32 (abfd, raw.nextrefsyms);
4074 cmd->indirectsymoff = bfd_h_get_32 (abfd, raw.indirectsymoff);
4075 cmd->nindirectsyms = bfd_h_get_32 (abfd, raw.nindirectsyms);
4076 cmd->extreloff = bfd_h_get_32 (abfd, raw.extreloff);
4077 cmd->nextrel = bfd_h_get_32 (abfd, raw.nextrel);
4078 cmd->locreloff = bfd_h_get_32 (abfd, raw.locreloff);
4079 cmd->nlocrel = bfd_h_get_32 (abfd, raw.nlocrel);
4080 }
4081
4082 if (cmd->nmodtab != 0)
4083 {
4084 unsigned int i;
4085 int wide = bfd_mach_o_wide_p (abfd);
4086 unsigned int module_len = wide ? 56 : 52;
4087
4088 cmd->dylib_module =
4089 bfd_alloc (abfd, cmd->nmodtab * sizeof (bfd_mach_o_dylib_module));
4090 if (cmd->dylib_module == NULL)
4091 return FALSE;
4092
4093 if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0)
4094 return FALSE;
4095
4096 for (i = 0; i < cmd->nmodtab; i++)
4097 {
4098 bfd_mach_o_dylib_module *module = &cmd->dylib_module[i];
4099 unsigned long v;
4100 unsigned char buf[56];
4101
4102 if (bfd_bread ((void *) buf, module_len, abfd) != module_len)
4103 return FALSE;
4104
4105 module->module_name_idx = bfd_h_get_32 (abfd, buf + 0);
4106 module->iextdefsym = bfd_h_get_32 (abfd, buf + 4);
4107 module->nextdefsym = bfd_h_get_32 (abfd, buf + 8);
4108 module->irefsym = bfd_h_get_32 (abfd, buf + 12);
4109 module->nrefsym = bfd_h_get_32 (abfd, buf + 16);
4110 module->ilocalsym = bfd_h_get_32 (abfd, buf + 20);
4111 module->nlocalsym = bfd_h_get_32 (abfd, buf + 24);
4112 module->iextrel = bfd_h_get_32 (abfd, buf + 28);
4113 module->nextrel = bfd_h_get_32 (abfd, buf + 32);
4114 v = bfd_h_get_32 (abfd, buf +36);
4115 module->iinit = v & 0xffff;
4116 module->iterm = (v >> 16) & 0xffff;
4117 v = bfd_h_get_32 (abfd, buf + 40);
4118 module->ninit = v & 0xffff;
4119 module->nterm = (v >> 16) & 0xffff;
4120 if (wide)
4121 {
4122 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 44);
4123 module->objc_module_info_addr = bfd_h_get_64 (abfd, buf + 48);
4124 }
4125 else
4126 {
4127 module->objc_module_info_addr = bfd_h_get_32 (abfd, buf + 44);
4128 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 48);
4129 }
4130 }
4131 }
4132
4133 if (cmd->ntoc != 0)
4134 {
4135 unsigned int i;
4136
4137 cmd->dylib_toc = bfd_alloc
4138 (abfd, cmd->ntoc * sizeof (bfd_mach_o_dylib_table_of_content));
4139 if (cmd->dylib_toc == NULL)
4140 return FALSE;
4141
4142 if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0)
4143 return FALSE;
4144
4145 for (i = 0; i < cmd->ntoc; i++)
4146 {
4147 struct mach_o_dylib_table_of_contents_external raw;
4148 bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i];
4149
4150 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4151 return FALSE;
4152
4153 toc->symbol_index = bfd_h_get_32 (abfd, raw.symbol_index);
4154 toc->module_index = bfd_h_get_32 (abfd, raw.module_index);
4155 }
4156 }
4157
4158 if (cmd->nindirectsyms != 0)
4159 {
4160 unsigned int i;
4161
4162 cmd->indirect_syms = bfd_alloc
4163 (abfd, cmd->nindirectsyms * sizeof (unsigned int));
4164 if (cmd->indirect_syms == NULL)
4165 return FALSE;
4166
4167 if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0)
4168 return FALSE;
4169
4170 for (i = 0; i < cmd->nindirectsyms; i++)
4171 {
4172 unsigned char raw[4];
4173 unsigned int *is = &cmd->indirect_syms[i];
4174
4175 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw))
4176 return FALSE;
4177
4178 *is = bfd_h_get_32 (abfd, raw);
4179 }
4180 }
4181
4182 if (cmd->nextrefsyms != 0)
4183 {
4184 unsigned long v;
4185 unsigned int i;
4186
4187 cmd->ext_refs = bfd_alloc
4188 (abfd, cmd->nextrefsyms * sizeof (bfd_mach_o_dylib_reference));
4189 if (cmd->ext_refs == NULL)
4190 return FALSE;
4191
4192 if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0)
4193 return FALSE;
4194
4195 for (i = 0; i < cmd->nextrefsyms; i++)
4196 {
4197 unsigned char raw[4];
4198 bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i];
4199
4200 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw))
4201 return FALSE;
4202
4203 /* Fields isym and flags are written as bit-fields, thus we need
4204 a specific processing for endianness. */
4205 v = bfd_h_get_32 (abfd, raw);
4206 if (bfd_big_endian (abfd))
4207 {
4208 ref->isym = (v >> 8) & 0xffffff;
4209 ref->flags = v & 0xff;
4210 }
4211 else
4212 {
4213 ref->isym = v & 0xffffff;
4214 ref->flags = (v >> 24) & 0xff;
4215 }
4216 }
4217 }
4218
4219 if (mdata->dysymtab)
4220 return FALSE;
4221 mdata->dysymtab = cmd;
4222
4223 return TRUE;
4224 }
4225
4226 static bfd_boolean
4227 bfd_mach_o_read_symtab (bfd *abfd, bfd_mach_o_load_command *command)
4228 {
4229 bfd_mach_o_symtab_command *symtab = &command->command.symtab;
4230 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4231 struct mach_o_symtab_command_external raw;
4232
4233 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB);
4234
4235 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4236 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4237 return FALSE;
4238
4239 symtab->symoff = bfd_h_get_32 (abfd, raw.symoff);
4240 symtab->nsyms = bfd_h_get_32 (abfd, raw.nsyms);
4241 symtab->stroff = bfd_h_get_32 (abfd, raw.stroff);
4242 symtab->strsize = bfd_h_get_32 (abfd, raw.strsize);
4243 symtab->symbols = NULL;
4244 symtab->strtab = NULL;
4245
4246 if (symtab->nsyms != 0)
4247 abfd->flags |= HAS_SYMS;
4248
4249 if (mdata->symtab)
4250 return FALSE;
4251 mdata->symtab = symtab;
4252 return TRUE;
4253 }
4254
4255 static bfd_boolean
4256 bfd_mach_o_read_uuid (bfd *abfd, bfd_mach_o_load_command *command)
4257 {
4258 bfd_mach_o_uuid_command *cmd = &command->command.uuid;
4259
4260 BFD_ASSERT (command->type == BFD_MACH_O_LC_UUID);
4261
4262 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4263 || bfd_bread (cmd->uuid, 16, abfd) != 16)
4264 return FALSE;
4265
4266 return TRUE;
4267 }
4268
4269 static bfd_boolean
4270 bfd_mach_o_read_linkedit (bfd *abfd, bfd_mach_o_load_command *command)
4271 {
4272 bfd_mach_o_linkedit_command *cmd = &command->command.linkedit;
4273 struct mach_o_linkedit_data_command_external raw;
4274
4275 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4276 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4277 return FALSE;
4278
4279 cmd->dataoff = bfd_get_32 (abfd, raw.dataoff);
4280 cmd->datasize = bfd_get_32 (abfd, raw.datasize);
4281 return TRUE;
4282 }
4283
4284 static bfd_boolean
4285 bfd_mach_o_read_str (bfd *abfd, bfd_mach_o_load_command *command)
4286 {
4287 bfd_mach_o_str_command *cmd = &command->command.str;
4288 struct mach_o_str_command_external raw;
4289 unsigned long off;
4290
4291 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4292 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4293 return FALSE;
4294
4295 off = bfd_get_32 (abfd, raw.str);
4296 cmd->stroff = command->offset + off;
4297 cmd->str_len = command->len - off;
4298 cmd->str = bfd_alloc (abfd, cmd->str_len);
4299 if (cmd->str == NULL)
4300 return FALSE;
4301 if (bfd_seek (abfd, cmd->stroff, SEEK_SET) != 0
4302 || bfd_bread ((void *) cmd->str, cmd->str_len, abfd) != cmd->str_len)
4303 return FALSE;
4304 return TRUE;
4305 }
4306
4307 static unsigned char *
4308 bfd_mach_o_alloc_and_read (bfd *abfd, unsigned int off, unsigned int size)
4309 {
4310 unsigned char *buf;
4311
4312 buf = bfd_alloc (abfd, size);
4313 if (buf == NULL)
4314 return NULL;
4315 if (bfd_seek (abfd, off, SEEK_SET) != 0
4316 || bfd_bread (buf, size, abfd) != size)
4317 return NULL;
4318 return buf;
4319 }
4320
4321 static bfd_boolean
4322 bfd_mach_o_read_dyld_content (bfd *abfd, bfd_mach_o_dyld_info_command *cmd)
4323 {
4324 /* Read rebase content. */
4325 if (cmd->rebase_content == NULL && cmd->rebase_size != 0)
4326 {
4327 cmd->rebase_content =
4328 bfd_mach_o_alloc_and_read (abfd, cmd->rebase_off, cmd->rebase_size);
4329 if (cmd->rebase_content == NULL)
4330 return FALSE;
4331 }
4332
4333 /* Read bind content. */
4334 if (cmd->bind_content == NULL && cmd->bind_size != 0)
4335 {
4336 cmd->bind_content =
4337 bfd_mach_o_alloc_and_read (abfd, cmd->bind_off, cmd->bind_size);
4338 if (cmd->bind_content == NULL)
4339 return FALSE;
4340 }
4341
4342 /* Read weak bind content. */
4343 if (cmd->weak_bind_content == NULL && cmd->weak_bind_size != 0)
4344 {
4345 cmd->weak_bind_content = bfd_mach_o_alloc_and_read
4346 (abfd, cmd->weak_bind_off, cmd->weak_bind_size);
4347 if (cmd->weak_bind_content == NULL)
4348 return FALSE;
4349 }
4350
4351 /* Read lazy bind content. */
4352 if (cmd->lazy_bind_content == NULL && cmd->lazy_bind_size != 0)
4353 {
4354 cmd->lazy_bind_content = bfd_mach_o_alloc_and_read
4355 (abfd, cmd->lazy_bind_off, cmd->lazy_bind_size);
4356 if (cmd->lazy_bind_content == NULL)
4357 return FALSE;
4358 }
4359
4360 /* Read export content. */
4361 if (cmd->export_content == NULL && cmd->export_size != 0)
4362 {
4363 cmd->export_content = bfd_mach_o_alloc_and_read
4364 (abfd, cmd->export_off, cmd->export_size);
4365 if (cmd->export_content == NULL)
4366 return FALSE;
4367 }
4368
4369 return TRUE;
4370 }
4371
4372 static bfd_boolean
4373 bfd_mach_o_read_dyld_info (bfd *abfd, bfd_mach_o_load_command *command)
4374 {
4375 bfd_mach_o_dyld_info_command *cmd = &command->command.dyld_info;
4376 struct mach_o_dyld_info_command_external raw;
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 cmd->rebase_off = bfd_get_32 (abfd, raw.rebase_off);
4383 cmd->rebase_size = bfd_get_32 (abfd, raw.rebase_size);
4384 cmd->rebase_content = NULL;
4385 cmd->bind_off = bfd_get_32 (abfd, raw.bind_off);
4386 cmd->bind_size = bfd_get_32 (abfd, raw.bind_size);
4387 cmd->bind_content = NULL;
4388 cmd->weak_bind_off = bfd_get_32 (abfd, raw.weak_bind_off);
4389 cmd->weak_bind_size = bfd_get_32 (abfd, raw.weak_bind_size);
4390 cmd->weak_bind_content = NULL;
4391 cmd->lazy_bind_off = bfd_get_32 (abfd, raw.lazy_bind_off);
4392 cmd->lazy_bind_size = bfd_get_32 (abfd, raw.lazy_bind_size);
4393 cmd->lazy_bind_content = NULL;
4394 cmd->export_off = bfd_get_32 (abfd, raw.export_off);
4395 cmd->export_size = bfd_get_32 (abfd, raw.export_size);
4396 cmd->export_content = NULL;
4397 return TRUE;
4398 }
4399
4400 static bfd_boolean
4401 bfd_mach_o_read_version_min (bfd *abfd, bfd_mach_o_load_command *command)
4402 {
4403 bfd_mach_o_version_min_command *cmd = &command->command.version_min;
4404 struct mach_o_version_min_command_external raw;
4405 unsigned int ver;
4406
4407 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4408 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4409 return FALSE;
4410
4411 ver = bfd_get_32 (abfd, raw.version);
4412 cmd->rel = ver >> 16;
4413 cmd->maj = ver >> 8;
4414 cmd->min = ver;
4415 cmd->reserved = bfd_get_32 (abfd, raw.reserved);
4416 return TRUE;
4417 }
4418
4419 static bfd_boolean
4420 bfd_mach_o_read_encryption_info (bfd *abfd, bfd_mach_o_load_command *command)
4421 {
4422 bfd_mach_o_encryption_info_command *cmd = &command->command.encryption_info;
4423 struct mach_o_encryption_info_command_external raw;
4424
4425 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4426 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4427 return FALSE;
4428
4429 cmd->cryptoff = bfd_get_32 (abfd, raw.cryptoff);
4430 cmd->cryptsize = bfd_get_32 (abfd, raw.cryptsize);
4431 cmd->cryptid = bfd_get_32 (abfd, raw.cryptid);
4432 return TRUE;
4433 }
4434
4435 static bfd_boolean
4436 bfd_mach_o_read_main (bfd *abfd, bfd_mach_o_load_command *command)
4437 {
4438 bfd_mach_o_main_command *cmd = &command->command.main;
4439 struct mach_o_entry_point_command_external raw;
4440
4441 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4442 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4443 return FALSE;
4444
4445 cmd->entryoff = bfd_get_64 (abfd, raw.entryoff);
4446 cmd->stacksize = bfd_get_64 (abfd, raw.stacksize);
4447 return TRUE;
4448 }
4449
4450 static bfd_boolean
4451 bfd_mach_o_read_source_version (bfd *abfd, bfd_mach_o_load_command *command)
4452 {
4453 bfd_mach_o_source_version_command *cmd = &command->command.source_version;
4454 struct mach_o_source_version_command_external raw;
4455 bfd_uint64_t ver;
4456
4457 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4458 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4459 return FALSE;
4460
4461 ver = bfd_get_64 (abfd, raw.version);
4462 /* Note: we use a serie of shift to avoid shift > 32 (for which gcc
4463 generates warnings) in case of the host doesn't support 64 bit
4464 integers. */
4465 cmd->e = ver & 0x3ff;
4466 ver >>= 10;
4467 cmd->d = ver & 0x3ff;
4468 ver >>= 10;
4469 cmd->c = ver & 0x3ff;
4470 ver >>= 10;
4471 cmd->b = ver & 0x3ff;
4472 ver >>= 10;
4473 cmd->a = ver & 0xffffff;
4474 return TRUE;
4475 }
4476
4477 static bfd_boolean
4478 bfd_mach_o_read_segment (bfd *abfd,
4479 bfd_mach_o_load_command *command,
4480 unsigned int wide)
4481 {
4482 bfd_mach_o_segment_command *seg = &command->command.segment;
4483 unsigned long i;
4484
4485 if (wide)
4486 {
4487 struct mach_o_segment_command_64_external raw;
4488
4489 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64);
4490
4491 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4492 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4493 return FALSE;
4494
4495 memcpy (seg->segname, raw.segname, 16);
4496 seg->segname[16] = '\0';
4497
4498 seg->vmaddr = bfd_h_get_64 (abfd, raw.vmaddr);
4499 seg->vmsize = bfd_h_get_64 (abfd, raw.vmsize);
4500 seg->fileoff = bfd_h_get_64 (abfd, raw.fileoff);
4501 seg->filesize = bfd_h_get_64 (abfd, raw.filesize);
4502 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot);
4503 seg->initprot = bfd_h_get_32 (abfd, raw.initprot);
4504 seg->nsects = bfd_h_get_32 (abfd, raw.nsects);
4505 seg->flags = bfd_h_get_32 (abfd, raw.flags);
4506 }
4507 else
4508 {
4509 struct mach_o_segment_command_32_external raw;
4510
4511 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT);
4512
4513 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4514 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4515 return FALSE;
4516
4517 memcpy (seg->segname, raw.segname, 16);
4518 seg->segname[16] = '\0';
4519
4520 seg->vmaddr = bfd_h_get_32 (abfd, raw.vmaddr);
4521 seg->vmsize = bfd_h_get_32 (abfd, raw.vmsize);
4522 seg->fileoff = bfd_h_get_32 (abfd, raw.fileoff);
4523 seg->filesize = bfd_h_get_32 (abfd, raw.filesize);
4524 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot);
4525 seg->initprot = bfd_h_get_32 (abfd, raw.initprot);
4526 seg->nsects = bfd_h_get_32 (abfd, raw.nsects);
4527 seg->flags = bfd_h_get_32 (abfd, raw.flags);
4528 }
4529 seg->sect_head = NULL;
4530 seg->sect_tail = NULL;
4531
4532 for (i = 0; i < seg->nsects; i++)
4533 {
4534 bfd_vma segoff;
4535 asection *sec;
4536
4537 if (wide)
4538 segoff = command->offset + BFD_MACH_O_LC_SEGMENT_64_SIZE
4539 + (i * BFD_MACH_O_SECTION_64_SIZE);
4540 else
4541 segoff = command->offset + BFD_MACH_O_LC_SEGMENT_SIZE
4542 + (i * BFD_MACH_O_SECTION_SIZE);
4543
4544 sec = bfd_mach_o_read_section (abfd, segoff, seg->initprot, wide);
4545 if (sec == NULL)
4546 return FALSE;
4547
4548 bfd_mach_o_append_section_to_segment
4549 (seg, bfd_mach_o_get_mach_o_section (sec));
4550 }
4551
4552 return TRUE;
4553 }
4554
4555 static bfd_boolean
4556 bfd_mach_o_read_segment_32 (bfd *abfd, bfd_mach_o_load_command *command)
4557 {
4558 return bfd_mach_o_read_segment (abfd, command, 0);
4559 }
4560
4561 static bfd_boolean
4562 bfd_mach_o_read_segment_64 (bfd *abfd, bfd_mach_o_load_command *command)
4563 {
4564 return bfd_mach_o_read_segment (abfd, command, 1);
4565 }
4566
4567 static bfd_boolean
4568 bfd_mach_o_read_command (bfd *abfd, bfd_mach_o_load_command *command)
4569 {
4570 struct mach_o_load_command_external raw;
4571 unsigned int cmd;
4572
4573 /* Read command type and length. */
4574 if (bfd_seek (abfd, command->offset, SEEK_SET) != 0
4575 || bfd_bread (&raw, BFD_MACH_O_LC_SIZE, abfd) != BFD_MACH_O_LC_SIZE)
4576 return FALSE;
4577
4578 cmd = bfd_h_get_32 (abfd, raw.cmd);
4579 command->type = cmd & ~BFD_MACH_O_LC_REQ_DYLD;
4580 command->type_required = cmd & BFD_MACH_O_LC_REQ_DYLD ? TRUE : FALSE;
4581 command->len = bfd_h_get_32 (abfd, raw.cmdsize);
4582
4583 switch (command->type)
4584 {
4585 case BFD_MACH_O_LC_SEGMENT:
4586 if (!bfd_mach_o_read_segment_32 (abfd, command))
4587 return FALSE;
4588 break;
4589 case BFD_MACH_O_LC_SEGMENT_64:
4590 if (!bfd_mach_o_read_segment_64 (abfd, command))
4591 return FALSE;
4592 break;
4593 case BFD_MACH_O_LC_SYMTAB:
4594 if (!bfd_mach_o_read_symtab (abfd, command))
4595 return FALSE;
4596 break;
4597 case BFD_MACH_O_LC_SYMSEG:
4598 break;
4599 case BFD_MACH_O_LC_THREAD:
4600 case BFD_MACH_O_LC_UNIXTHREAD:
4601 if (!bfd_mach_o_read_thread (abfd, command))
4602 return FALSE;
4603 break;
4604 case BFD_MACH_O_LC_LOAD_DYLINKER:
4605 case BFD_MACH_O_LC_ID_DYLINKER:
4606 case BFD_MACH_O_LC_DYLD_ENVIRONMENT:
4607 if (!bfd_mach_o_read_dylinker (abfd, command))
4608 return FALSE;
4609 break;
4610 case BFD_MACH_O_LC_LOAD_DYLIB:
4611 case BFD_MACH_O_LC_LAZY_LOAD_DYLIB:
4612 case BFD_MACH_O_LC_ID_DYLIB:
4613 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
4614 case BFD_MACH_O_LC_REEXPORT_DYLIB:
4615 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
4616 if (!bfd_mach_o_read_dylib (abfd, command))
4617 return FALSE;
4618 break;
4619 case BFD_MACH_O_LC_PREBOUND_DYLIB:
4620 if (!bfd_mach_o_read_prebound_dylib (abfd, command))
4621 return FALSE;
4622 break;
4623 case BFD_MACH_O_LC_LOADFVMLIB:
4624 case BFD_MACH_O_LC_IDFVMLIB:
4625 if (!bfd_mach_o_read_fvmlib (abfd, command))
4626 return FALSE;
4627 break;
4628 case BFD_MACH_O_LC_IDENT:
4629 case BFD_MACH_O_LC_FVMFILE:
4630 case BFD_MACH_O_LC_PREPAGE:
4631 case BFD_MACH_O_LC_ROUTINES:
4632 case BFD_MACH_O_LC_ROUTINES_64:
4633 break;
4634 case BFD_MACH_O_LC_SUB_FRAMEWORK:
4635 case BFD_MACH_O_LC_SUB_UMBRELLA:
4636 case BFD_MACH_O_LC_SUB_LIBRARY:
4637 case BFD_MACH_O_LC_SUB_CLIENT:
4638 case BFD_MACH_O_LC_RPATH:
4639 if (!bfd_mach_o_read_str (abfd, command))
4640 return FALSE;
4641 break;
4642 case BFD_MACH_O_LC_DYSYMTAB:
4643 if (!bfd_mach_o_read_dysymtab (abfd, command))
4644 return FALSE;
4645 break;
4646 case BFD_MACH_O_LC_PREBIND_CKSUM:
4647 if (!bfd_mach_o_read_prebind_cksum (abfd, command))
4648 return FALSE;
4649 break;
4650 case BFD_MACH_O_LC_TWOLEVEL_HINTS:
4651 if (!bfd_mach_o_read_twolevel_hints (abfd, command))
4652 return FALSE;
4653 break;
4654 case BFD_MACH_O_LC_UUID:
4655 if (!bfd_mach_o_read_uuid (abfd, command))
4656 return FALSE;
4657 break;
4658 case BFD_MACH_O_LC_CODE_SIGNATURE:
4659 case BFD_MACH_O_LC_SEGMENT_SPLIT_INFO:
4660 case BFD_MACH_O_LC_FUNCTION_STARTS:
4661 case BFD_MACH_O_LC_DATA_IN_CODE:
4662 case BFD_MACH_O_LC_DYLIB_CODE_SIGN_DRS:
4663 if (!bfd_mach_o_read_linkedit (abfd, command))
4664 return FALSE;
4665 break;
4666 case BFD_MACH_O_LC_ENCRYPTION_INFO:
4667 if (!bfd_mach_o_read_encryption_info (abfd, command))
4668 return FALSE;
4669 break;
4670 case BFD_MACH_O_LC_DYLD_INFO:
4671 if (!bfd_mach_o_read_dyld_info (abfd, command))
4672 return FALSE;
4673 break;
4674 case BFD_MACH_O_LC_VERSION_MIN_MACOSX:
4675 case BFD_MACH_O_LC_VERSION_MIN_IPHONEOS:
4676 if (!bfd_mach_o_read_version_min (abfd, command))
4677 return FALSE;
4678 break;
4679 case BFD_MACH_O_LC_MAIN:
4680 if (!bfd_mach_o_read_main (abfd, command))
4681 return FALSE;
4682 break;
4683 case BFD_MACH_O_LC_SOURCE_VERSION:
4684 if (!bfd_mach_o_read_source_version (abfd, command))
4685 return FALSE;
4686 break;
4687 default:
4688 {
4689 static bfd_boolean unknown_set = FALSE;
4690 static unsigned long unknown_command = 0;
4691
4692 /* Prevent reams of error messages when parsing corrupt binaries. */
4693 if (!unknown_set)
4694 unknown_set = TRUE;
4695 else if (command->type == unknown_command)
4696 break;
4697 unknown_command = command->type;
4698
4699 (*_bfd_error_handler)(_("%B: unknown load command 0x%lx"),
4700 abfd, (unsigned long) command->type);
4701 break;
4702 }
4703 }
4704
4705 return TRUE;
4706 }
4707
4708 static void
4709 bfd_mach_o_flatten_sections (bfd *abfd)
4710 {
4711 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4712 bfd_mach_o_load_command *cmd;
4713 long csect = 0;
4714
4715 /* Count total number of sections. */
4716 mdata->nsects = 0;
4717
4718 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
4719 {
4720 if (cmd->type == BFD_MACH_O_LC_SEGMENT
4721 || cmd->type == BFD_MACH_O_LC_SEGMENT_64)
4722 {
4723 bfd_mach_o_segment_command *seg = &cmd->command.segment;
4724
4725 mdata->nsects += seg->nsects;
4726 }
4727 }
4728
4729 /* Allocate sections array. */
4730 mdata->sections = bfd_alloc (abfd,
4731 mdata->nsects * sizeof (bfd_mach_o_section *));
4732
4733 /* Fill the array. */
4734 csect = 0;
4735
4736 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
4737 {
4738 if (cmd->type == BFD_MACH_O_LC_SEGMENT
4739 || cmd->type == BFD_MACH_O_LC_SEGMENT_64)
4740 {
4741 bfd_mach_o_segment_command *seg = &cmd->command.segment;
4742 bfd_mach_o_section *sec;
4743
4744 BFD_ASSERT (csect + seg->nsects <= mdata->nsects);
4745
4746 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
4747 mdata->sections[csect++] = sec;
4748 }
4749 }
4750 }
4751
4752 static bfd_boolean
4753 bfd_mach_o_scan_start_address (bfd *abfd)
4754 {
4755 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4756 bfd_mach_o_thread_command *thr = NULL;
4757 bfd_mach_o_load_command *cmd;
4758 unsigned long i;
4759
4760 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
4761 if (cmd->type == BFD_MACH_O_LC_THREAD
4762 || cmd->type == BFD_MACH_O_LC_UNIXTHREAD)
4763 {
4764 thr = &cmd->command.thread;
4765 break;
4766 }
4767 else if (cmd->type == BFD_MACH_O_LC_MAIN && mdata->nsects > 1)
4768 {
4769 bfd_mach_o_main_command *main_cmd = &cmd->command.main;
4770 bfd_mach_o_section *text_sect = mdata->sections[0];
4771
4772 if (text_sect)
4773 {
4774 abfd->start_address = main_cmd->entryoff
4775 + (text_sect->addr - text_sect->offset);
4776 return TRUE;
4777 }
4778 }
4779
4780 /* An object file has no start address, so do not fail if not found. */
4781 if (thr == NULL)
4782 return TRUE;
4783
4784 /* FIXME: create a subtarget hook ? */
4785 for (i = 0; i < thr->nflavours; i++)
4786 {
4787 if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_I386)
4788 && (thr->flavours[i].flavour == BFD_MACH_O_x86_THREAD_STATE32))
4789 {
4790 unsigned char buf[4];
4791
4792 if (bfd_seek (abfd, thr->flavours[i].offset + 40, SEEK_SET) != 0
4793 || bfd_bread (buf, 4, abfd) != 4)
4794 return FALSE;
4795
4796 abfd->start_address = bfd_h_get_32 (abfd, buf);
4797 }
4798 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC)
4799 && (thr->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE))
4800 {
4801 unsigned char buf[4];
4802
4803 if (bfd_seek (abfd, thr->flavours[i].offset + 0, SEEK_SET) != 0
4804 || bfd_bread (buf, 4, abfd) != 4)
4805 return FALSE;
4806
4807 abfd->start_address = bfd_h_get_32 (abfd, buf);
4808 }
4809 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC_64)
4810 && (thr->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE64))
4811 {
4812 unsigned char buf[8];
4813
4814 if (bfd_seek (abfd, thr->flavours[i].offset + 0, SEEK_SET) != 0
4815 || bfd_bread (buf, 8, abfd) != 8)
4816 return FALSE;
4817
4818 abfd->start_address = bfd_h_get_64 (abfd, buf);
4819 }
4820 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_X86_64)
4821 && (thr->flavours[i].flavour == BFD_MACH_O_x86_THREAD_STATE64))
4822 {
4823 unsigned char buf[8];
4824
4825 if (bfd_seek (abfd, thr->flavours[i].offset + (16 * 8), SEEK_SET) != 0
4826 || bfd_bread (buf, 8, abfd) != 8)
4827 return FALSE;
4828
4829 abfd->start_address = bfd_h_get_64 (abfd, buf);
4830 }
4831 }
4832
4833 return TRUE;
4834 }
4835
4836 bfd_boolean
4837 bfd_mach_o_set_arch_mach (bfd *abfd,
4838 enum bfd_architecture arch,
4839 unsigned long machine)
4840 {
4841 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
4842
4843 /* If this isn't the right architecture for this backend, and this
4844 isn't the generic backend, fail. */
4845 if (arch != bed->arch
4846 && arch != bfd_arch_unknown
4847 && bed->arch != bfd_arch_unknown)
4848 return FALSE;
4849
4850 return bfd_default_set_arch_mach (abfd, arch, machine);
4851 }
4852
4853 static bfd_boolean
4854 bfd_mach_o_scan (bfd *abfd,
4855 bfd_mach_o_header *header,
4856 bfd_mach_o_data_struct *mdata)
4857 {
4858 unsigned int i;
4859 enum bfd_architecture cputype;
4860 unsigned long cpusubtype;
4861 unsigned int hdrsize;
4862
4863 hdrsize = mach_o_wide_p (header) ?
4864 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
4865
4866 mdata->header = *header;
4867
4868 abfd->flags = abfd->flags & BFD_IN_MEMORY;
4869 switch (header->filetype)
4870 {
4871 case BFD_MACH_O_MH_OBJECT:
4872 abfd->flags |= HAS_RELOC;
4873 break;
4874 case BFD_MACH_O_MH_EXECUTE:
4875 abfd->flags |= EXEC_P;
4876 break;
4877 case BFD_MACH_O_MH_DYLIB:
4878 case BFD_MACH_O_MH_BUNDLE:
4879 abfd->flags |= DYNAMIC;
4880 break;
4881 }
4882
4883 abfd->tdata.mach_o_data = mdata;
4884
4885 bfd_mach_o_convert_architecture (header->cputype, header->cpusubtype,
4886 &cputype, &cpusubtype);
4887 if (cputype == bfd_arch_unknown)
4888 {
4889 (*_bfd_error_handler)
4890 (_("bfd_mach_o_scan: unknown architecture 0x%lx/0x%lx"),
4891 header->cputype, header->cpusubtype);
4892 return FALSE;
4893 }
4894
4895 bfd_set_arch_mach (abfd, cputype, cpusubtype);
4896
4897 if (header->ncmds != 0)
4898 {
4899 bfd_mach_o_load_command *cmd;
4900
4901 mdata->first_command = NULL;
4902 mdata->last_command = NULL;
4903 cmd = bfd_alloc (abfd, header->ncmds * sizeof (bfd_mach_o_load_command));
4904 if (cmd == NULL)
4905 return FALSE;
4906
4907 for (i = 0; i < header->ncmds; i++)
4908 {
4909 bfd_mach_o_load_command *cur = &cmd[i];
4910
4911 bfd_mach_o_append_command (abfd, cur);
4912
4913 if (i == 0)
4914 cur->offset = hdrsize;
4915 else
4916 {
4917 bfd_mach_o_load_command *prev = &cmd[i - 1];
4918 cur->offset = prev->offset + prev->len;
4919 }
4920
4921 if (!bfd_mach_o_read_command (abfd, cur))
4922 return FALSE;
4923 }
4924 }
4925
4926 /* Sections should be flatten before scanning start address. */
4927 bfd_mach_o_flatten_sections (abfd);
4928 if (!bfd_mach_o_scan_start_address (abfd))
4929 return FALSE;
4930
4931 return TRUE;
4932 }
4933
4934 bfd_boolean
4935 bfd_mach_o_mkobject_init (bfd *abfd)
4936 {
4937 bfd_mach_o_data_struct *mdata = NULL;
4938
4939 mdata = bfd_zalloc (abfd, sizeof (bfd_mach_o_data_struct));
4940 if (mdata == NULL)
4941 return FALSE;
4942 abfd->tdata.mach_o_data = mdata;
4943
4944 mdata->header.magic = 0;
4945 mdata->header.cputype = 0;
4946 mdata->header.cpusubtype = 0;
4947 mdata->header.filetype = 0;
4948 mdata->header.ncmds = 0;
4949 mdata->header.sizeofcmds = 0;
4950 mdata->header.flags = 0;
4951 mdata->header.byteorder = BFD_ENDIAN_UNKNOWN;
4952 mdata->first_command = NULL;
4953 mdata->last_command = NULL;
4954 mdata->nsects = 0;
4955 mdata->sections = NULL;
4956 mdata->dyn_reloc_cache = NULL;
4957
4958 return TRUE;
4959 }
4960
4961 static bfd_boolean
4962 bfd_mach_o_gen_mkobject (bfd *abfd)
4963 {
4964 bfd_mach_o_data_struct *mdata;
4965
4966 if (!bfd_mach_o_mkobject_init (abfd))
4967 return FALSE;
4968
4969 mdata = bfd_mach_o_get_data (abfd);
4970 mdata->header.magic = BFD_MACH_O_MH_MAGIC;
4971 mdata->header.cputype = 0;
4972 mdata->header.cpusubtype = 0;
4973 mdata->header.byteorder = abfd->xvec->byteorder;
4974 mdata->header.version = 1;
4975
4976 return TRUE;
4977 }
4978
4979 const bfd_target *
4980 bfd_mach_o_header_p (bfd *abfd,
4981 bfd_mach_o_filetype filetype,
4982 bfd_mach_o_cpu_type cputype)
4983 {
4984 bfd_mach_o_header header;
4985 bfd_mach_o_data_struct *mdata;
4986
4987 if (!bfd_mach_o_read_header (abfd, &header))
4988 goto wrong;
4989
4990 if (! (header.byteorder == BFD_ENDIAN_BIG
4991 || header.byteorder == BFD_ENDIAN_LITTLE))
4992 {
4993 (*_bfd_error_handler) (_("unknown header byte-order value 0x%lx"),
4994 (unsigned long) header.byteorder);
4995 goto wrong;
4996 }
4997
4998 if (! ((header.byteorder == BFD_ENDIAN_BIG
4999 && abfd->xvec->byteorder == BFD_ENDIAN_BIG
5000 && abfd->xvec->header_byteorder == BFD_ENDIAN_BIG)
5001 || (header.byteorder == BFD_ENDIAN_LITTLE
5002 && abfd->xvec->byteorder == BFD_ENDIAN_LITTLE
5003 && abfd->xvec->header_byteorder == BFD_ENDIAN_LITTLE)))
5004 goto wrong;
5005
5006 /* Check cputype and filetype.
5007 In case of wildcard, do not accept magics that are handled by existing
5008 targets. */
5009 if (cputype)
5010 {
5011 if (header.cputype != cputype)
5012 goto wrong;
5013 }
5014 else
5015 {
5016 #ifndef BFD64
5017 /* Do not recognize 64 architectures if not configured for 64bit targets.
5018 This could happen only for generic targets. */
5019 if (mach_o_wide_p (&header))
5020 goto wrong;
5021 #endif
5022 }
5023
5024 if (filetype)
5025 {
5026 if (header.filetype != filetype)
5027 goto wrong;
5028 }
5029 else
5030 {
5031 switch (header.filetype)
5032 {
5033 case BFD_MACH_O_MH_CORE:
5034 /* Handled by core_p */
5035 goto wrong;
5036 default:
5037 break;
5038 }
5039 }
5040
5041 mdata = (bfd_mach_o_data_struct *) bfd_zalloc (abfd, sizeof (*mdata));
5042 if (mdata == NULL)
5043 goto fail;
5044
5045 if (!bfd_mach_o_scan (abfd, &header, mdata))
5046 goto wrong;
5047
5048 return abfd->xvec;
5049
5050 wrong:
5051 bfd_set_error (bfd_error_wrong_format);
5052
5053 fail:
5054 return NULL;
5055 }
5056
5057 static const bfd_target *
5058 bfd_mach_o_gen_object_p (bfd *abfd)
5059 {
5060 return bfd_mach_o_header_p (abfd, 0, 0);
5061 }
5062
5063 static const bfd_target *
5064 bfd_mach_o_gen_core_p (bfd *abfd)
5065 {
5066 return bfd_mach_o_header_p (abfd, BFD_MACH_O_MH_CORE, 0);
5067 }
5068
5069 /* Return the base address of ABFD, ie the address at which the image is
5070 mapped. The possible initial pagezero is ignored. */
5071
5072 bfd_vma
5073 bfd_mach_o_get_base_address (bfd *abfd)
5074 {
5075 bfd_mach_o_data_struct *mdata;
5076 bfd_mach_o_load_command *cmd;
5077
5078 /* Check for Mach-O. */
5079 if (!bfd_mach_o_valid (abfd))
5080 return 0;
5081 mdata = bfd_mach_o_get_data (abfd);
5082
5083 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5084 {
5085 if ((cmd->type == BFD_MACH_O_LC_SEGMENT
5086 || cmd->type == BFD_MACH_O_LC_SEGMENT_64))
5087 {
5088 struct bfd_mach_o_segment_command *segcmd = &cmd->command.segment;
5089
5090 if (segcmd->initprot != 0)
5091 return segcmd->vmaddr;
5092 }
5093 }
5094 return 0;
5095 }
5096
5097 typedef struct mach_o_fat_archentry
5098 {
5099 unsigned long cputype;
5100 unsigned long cpusubtype;
5101 unsigned long offset;
5102 unsigned long size;
5103 unsigned long align;
5104 } mach_o_fat_archentry;
5105
5106 typedef struct mach_o_fat_data_struct
5107 {
5108 unsigned long magic;
5109 unsigned long nfat_arch;
5110 mach_o_fat_archentry *archentries;
5111 } mach_o_fat_data_struct;
5112
5113 const bfd_target *
5114 bfd_mach_o_archive_p (bfd *abfd)
5115 {
5116 mach_o_fat_data_struct *adata = NULL;
5117 struct mach_o_fat_header_external hdr;
5118 unsigned long i;
5119
5120 if (bfd_seek (abfd, 0, SEEK_SET) != 0
5121 || bfd_bread (&hdr, sizeof (hdr), abfd) != sizeof (hdr))
5122 goto error;
5123
5124 adata = bfd_alloc (abfd, sizeof (mach_o_fat_data_struct));
5125 if (adata == NULL)
5126 goto error;
5127
5128 adata->magic = bfd_getb32 (hdr.magic);
5129 adata->nfat_arch = bfd_getb32 (hdr.nfat_arch);
5130 if (adata->magic != 0xcafebabe)
5131 goto error;
5132 /* Avoid matching Java bytecode files, which have the same magic number.
5133 In the Java bytecode file format this field contains the JVM version,
5134 which starts at 43.0. */
5135 if (adata->nfat_arch > 30)
5136 goto error;
5137
5138 adata->archentries =
5139 bfd_alloc (abfd, adata->nfat_arch * sizeof (mach_o_fat_archentry));
5140 if (adata->archentries == NULL)
5141 goto error;
5142
5143 for (i = 0; i < adata->nfat_arch; i++)
5144 {
5145 struct mach_o_fat_arch_external arch;
5146 if (bfd_bread (&arch, sizeof (arch), abfd) != sizeof (arch))
5147 goto error;
5148 adata->archentries[i].cputype = bfd_getb32 (arch.cputype);
5149 adata->archentries[i].cpusubtype = bfd_getb32 (arch.cpusubtype);
5150 adata->archentries[i].offset = bfd_getb32 (arch.offset);
5151 adata->archentries[i].size = bfd_getb32 (arch.size);
5152 adata->archentries[i].align = bfd_getb32 (arch.align);
5153 }
5154
5155 abfd->tdata.mach_o_fat_data = adata;
5156 return abfd->xvec;
5157
5158 error:
5159 if (adata != NULL)
5160 bfd_release (abfd, adata);
5161 bfd_set_error (bfd_error_wrong_format);
5162 return NULL;
5163 }
5164
5165 /* Set the filename for a fat binary member ABFD, whose bfd architecture is
5166 ARCH_TYPE/ARCH_SUBTYPE and corresponding entry in header is ENTRY.
5167 Set arelt_data and origin fields too. */
5168
5169 static void
5170 bfd_mach_o_fat_member_init (bfd *abfd,
5171 enum bfd_architecture arch_type,
5172 unsigned long arch_subtype,
5173 mach_o_fat_archentry *entry)
5174 {
5175 struct areltdata *areltdata;
5176 /* Create the member filename. Use ARCH_NAME. */
5177 const bfd_arch_info_type *ap = bfd_lookup_arch (arch_type, arch_subtype);
5178
5179 if (ap)
5180 {
5181 /* Use the architecture name if known. */
5182 abfd->filename = xstrdup (ap->printable_name);
5183 }
5184 else
5185 {
5186 /* Forge a uniq id. */
5187 const size_t namelen = 2 + 8 + 1 + 2 + 8 + 1;
5188 char *name = xmalloc (namelen);
5189 snprintf (name, namelen, "0x%lx-0x%lx",
5190 entry->cputype, entry->cpusubtype);
5191 abfd->filename = name;
5192 }
5193
5194 areltdata = bfd_zmalloc (sizeof (struct areltdata));
5195 areltdata->parsed_size = entry->size;
5196 abfd->arelt_data = areltdata;
5197 abfd->iostream = NULL;
5198 abfd->origin = entry->offset;
5199 }
5200
5201 bfd *
5202 bfd_mach_o_openr_next_archived_file (bfd *archive, bfd *prev)
5203 {
5204 mach_o_fat_data_struct *adata;
5205 mach_o_fat_archentry *entry = NULL;
5206 unsigned long i;
5207 bfd *nbfd;
5208 enum bfd_architecture arch_type;
5209 unsigned long arch_subtype;
5210
5211 adata = (mach_o_fat_data_struct *) archive->tdata.mach_o_fat_data;
5212 BFD_ASSERT (adata != NULL);
5213
5214 /* Find index of previous entry. */
5215 if (prev == NULL)
5216 {
5217 /* Start at first one. */
5218 i = 0;
5219 }
5220 else
5221 {
5222 /* Find index of PREV. */
5223 for (i = 0; i < adata->nfat_arch; i++)
5224 {
5225 if (adata->archentries[i].offset == prev->origin)
5226 break;
5227 }
5228
5229 if (i == adata->nfat_arch)
5230 {
5231 /* Not found. */
5232 bfd_set_error (bfd_error_bad_value);
5233 return NULL;
5234 }
5235
5236 /* Get next entry. */
5237 i++;
5238 }
5239
5240 if (i >= adata->nfat_arch)
5241 {
5242 bfd_set_error (bfd_error_no_more_archived_files);
5243 return NULL;
5244 }
5245
5246 entry = &adata->archentries[i];
5247 nbfd = _bfd_new_bfd_contained_in (archive);
5248 if (nbfd == NULL)
5249 return NULL;
5250
5251 bfd_mach_o_convert_architecture (entry->cputype, entry->cpusubtype,
5252 &arch_type, &arch_subtype);
5253
5254 bfd_mach_o_fat_member_init (nbfd, arch_type, arch_subtype, entry);
5255
5256 bfd_set_arch_mach (nbfd, arch_type, arch_subtype);
5257
5258 return nbfd;
5259 }
5260
5261 /* Analogous to stat call. */
5262
5263 static int
5264 bfd_mach_o_fat_stat_arch_elt (bfd *abfd, struct stat *buf)
5265 {
5266 if (abfd->arelt_data == NULL)
5267 {
5268 bfd_set_error (bfd_error_invalid_operation);
5269 return -1;
5270 }
5271
5272 buf->st_mtime = 0;
5273 buf->st_uid = 0;
5274 buf->st_gid = 0;
5275 buf->st_mode = 0644;
5276 buf->st_size = arelt_size (abfd);
5277
5278 return 0;
5279 }
5280
5281 /* If ABFD format is FORMAT and architecture is ARCH, return it.
5282 If ABFD is a fat image containing a member that corresponds to FORMAT
5283 and ARCH, returns it.
5284 In other case, returns NULL.
5285 This function allows transparent uses of fat images. */
5286
5287 bfd *
5288 bfd_mach_o_fat_extract (bfd *abfd,
5289 bfd_format format,
5290 const bfd_arch_info_type *arch)
5291 {
5292 bfd *res;
5293 mach_o_fat_data_struct *adata;
5294 unsigned int i;
5295
5296 if (bfd_check_format (abfd, format))
5297 {
5298 if (bfd_get_arch_info (abfd) == arch)
5299 return abfd;
5300 return NULL;
5301 }
5302 if (!bfd_check_format (abfd, bfd_archive)
5303 || abfd->xvec != &mach_o_fat_vec)
5304 return NULL;
5305
5306 /* This is a Mach-O fat image. */
5307 adata = (mach_o_fat_data_struct *) abfd->tdata.mach_o_fat_data;
5308 BFD_ASSERT (adata != NULL);
5309
5310 for (i = 0; i < adata->nfat_arch; i++)
5311 {
5312 struct mach_o_fat_archentry *e = &adata->archentries[i];
5313 enum bfd_architecture cpu_type;
5314 unsigned long cpu_subtype;
5315
5316 bfd_mach_o_convert_architecture (e->cputype, e->cpusubtype,
5317 &cpu_type, &cpu_subtype);
5318 if (cpu_type != arch->arch || cpu_subtype != arch->mach)
5319 continue;
5320
5321 /* The architecture is found. */
5322 res = _bfd_new_bfd_contained_in (abfd);
5323 if (res == NULL)
5324 return NULL;
5325
5326 bfd_mach_o_fat_member_init (res, cpu_type, cpu_subtype, e);
5327
5328 if (bfd_check_format (res, format))
5329 {
5330 BFD_ASSERT (bfd_get_arch_info (res) == arch);
5331 return res;
5332 }
5333 bfd_close (res);
5334 return NULL;
5335 }
5336
5337 return NULL;
5338 }
5339
5340 int
5341 bfd_mach_o_lookup_command (bfd *abfd,
5342 bfd_mach_o_load_command_type type,
5343 bfd_mach_o_load_command **mcommand)
5344 {
5345 struct mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5346 struct bfd_mach_o_load_command *cmd;
5347 unsigned int num;
5348
5349 BFD_ASSERT (mdata != NULL);
5350 BFD_ASSERT (mcommand != NULL);
5351
5352 num = 0;
5353 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5354 {
5355 if (cmd->type != type)
5356 continue;
5357
5358 if (num == 0)
5359 *mcommand = cmd;
5360 num++;
5361 }
5362
5363 return num;
5364 }
5365
5366 unsigned long
5367 bfd_mach_o_stack_addr (enum bfd_mach_o_cpu_type type)
5368 {
5369 switch (type)
5370 {
5371 case BFD_MACH_O_CPU_TYPE_MC680x0:
5372 return 0x04000000;
5373 case BFD_MACH_O_CPU_TYPE_MC88000:
5374 return 0xffffe000;
5375 case BFD_MACH_O_CPU_TYPE_POWERPC:
5376 return 0xc0000000;
5377 case BFD_MACH_O_CPU_TYPE_I386:
5378 return 0xc0000000;
5379 case BFD_MACH_O_CPU_TYPE_SPARC:
5380 return 0xf0000000;
5381 case BFD_MACH_O_CPU_TYPE_I860:
5382 return 0;
5383 case BFD_MACH_O_CPU_TYPE_HPPA:
5384 return 0xc0000000 - 0x04000000;
5385 default:
5386 return 0;
5387 }
5388 }
5389
5390 /* The following two tables should be kept, as far as possible, in order of
5391 most frequently used entries to optimize their use from gas. */
5392
5393 const bfd_mach_o_xlat_name bfd_mach_o_section_type_name[] =
5394 {
5395 { "regular", BFD_MACH_O_S_REGULAR},
5396 { "coalesced", BFD_MACH_O_S_COALESCED},
5397 { "zerofill", BFD_MACH_O_S_ZEROFILL},
5398 { "cstring_literals", BFD_MACH_O_S_CSTRING_LITERALS},
5399 { "4byte_literals", BFD_MACH_O_S_4BYTE_LITERALS},
5400 { "8byte_literals", BFD_MACH_O_S_8BYTE_LITERALS},
5401 { "16byte_literals", BFD_MACH_O_S_16BYTE_LITERALS},
5402 { "literal_pointers", BFD_MACH_O_S_LITERAL_POINTERS},
5403 { "mod_init_func_pointers", BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS},
5404 { "mod_fini_func_pointers", BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS},
5405 { "gb_zerofill", BFD_MACH_O_S_GB_ZEROFILL},
5406 { "interposing", BFD_MACH_O_S_INTERPOSING},
5407 { "dtrace_dof", BFD_MACH_O_S_DTRACE_DOF},
5408 { "non_lazy_symbol_pointers", BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS},
5409 { "lazy_symbol_pointers", BFD_MACH_O_S_LAZY_SYMBOL_POINTERS},
5410 { "symbol_stubs", BFD_MACH_O_S_SYMBOL_STUBS},
5411 { "lazy_dylib_symbol_pointers", BFD_MACH_O_S_LAZY_DYLIB_SYMBOL_POINTERS},
5412 { NULL, 0}
5413 };
5414
5415 const bfd_mach_o_xlat_name bfd_mach_o_section_attribute_name[] =
5416 {
5417 { "pure_instructions", BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS },
5418 { "some_instructions", BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS },
5419 { "loc_reloc", BFD_MACH_O_S_ATTR_LOC_RELOC },
5420 { "ext_reloc", BFD_MACH_O_S_ATTR_EXT_RELOC },
5421 { "debug", BFD_MACH_O_S_ATTR_DEBUG },
5422 { "live_support", BFD_MACH_O_S_ATTR_LIVE_SUPPORT },
5423 { "no_dead_strip", BFD_MACH_O_S_ATTR_NO_DEAD_STRIP },
5424 { "strip_static_syms", BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS },
5425 { "no_toc", BFD_MACH_O_S_ATTR_NO_TOC },
5426 { "self_modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
5427 { "modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
5428 { NULL, 0}
5429 };
5430
5431 /* Get the section type from NAME. Return 256 if NAME is unknown. */
5432
5433 unsigned int
5434 bfd_mach_o_get_section_type_from_name (bfd *abfd, const char *name)
5435 {
5436 const bfd_mach_o_xlat_name *x;
5437 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
5438
5439 for (x = bfd_mach_o_section_type_name; x->name; x++)
5440 if (strcmp (x->name, name) == 0)
5441 {
5442 /* We found it... does the target support it? */
5443 if (bed->bfd_mach_o_section_type_valid_for_target == NULL
5444 || bed->bfd_mach_o_section_type_valid_for_target (x->val))
5445 return x->val; /* OK. */
5446 else
5447 break; /* Not supported. */
5448 }
5449 /* Maximum section ID = 0xff. */
5450 return 256;
5451 }
5452
5453 /* Get the section attribute from NAME. Return -1 if NAME is unknown. */
5454
5455 unsigned int
5456 bfd_mach_o_get_section_attribute_from_name (const char *name)
5457 {
5458 const bfd_mach_o_xlat_name *x;
5459
5460 for (x = bfd_mach_o_section_attribute_name; x->name; x++)
5461 if (strcmp (x->name, name) == 0)
5462 return x->val;
5463 return (unsigned int)-1;
5464 }
5465
5466 int
5467 bfd_mach_o_core_fetch_environment (bfd *abfd,
5468 unsigned char **rbuf,
5469 unsigned int *rlen)
5470 {
5471 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5472 unsigned long stackaddr = bfd_mach_o_stack_addr (mdata->header.cputype);
5473 bfd_mach_o_load_command *cmd;
5474
5475 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5476 {
5477 bfd_mach_o_segment_command *seg;
5478
5479 if (cmd->type != BFD_MACH_O_LC_SEGMENT)
5480 continue;
5481
5482 seg = &cmd->command.segment;
5483
5484 if ((seg->vmaddr + seg->vmsize) == stackaddr)
5485 {
5486 unsigned long start = seg->fileoff;
5487 unsigned long end = seg->fileoff + seg->filesize;
5488 unsigned char *buf = bfd_malloc (1024);
5489 unsigned long size = 1024;
5490
5491 for (;;)
5492 {
5493 bfd_size_type nread = 0;
5494 unsigned long offset;
5495 int found_nonnull = 0;
5496
5497 if (size > (end - start))
5498 size = (end - start);
5499
5500 buf = bfd_realloc_or_free (buf, size);
5501 if (buf == NULL)
5502 return -1;
5503
5504 if (bfd_seek (abfd, end - size, SEEK_SET) != 0)
5505 {
5506 free (buf);
5507 return -1;
5508 }
5509
5510 nread = bfd_bread (buf, size, abfd);
5511
5512 if (nread != size)
5513 {
5514 free (buf);
5515 return -1;
5516 }
5517
5518 for (offset = 4; offset <= size; offset += 4)
5519 {
5520 unsigned long val;
5521
5522 val = *((unsigned long *) (buf + size - offset));
5523 if (! found_nonnull)
5524 {
5525 if (val != 0)
5526 found_nonnull = 1;
5527 }
5528 else if (val == 0x0)
5529 {
5530 unsigned long bottom;
5531 unsigned long top;
5532
5533 bottom = seg->fileoff + seg->filesize - offset;
5534 top = seg->fileoff + seg->filesize - 4;
5535 *rbuf = bfd_malloc (top - bottom);
5536 *rlen = top - bottom;
5537
5538 memcpy (*rbuf, buf + size - *rlen, *rlen);
5539 free (buf);
5540 return 0;
5541 }
5542 }
5543
5544 if (size == (end - start))
5545 break;
5546
5547 size *= 2;
5548 }
5549
5550 free (buf);
5551 }
5552 }
5553
5554 return -1;
5555 }
5556
5557 char *
5558 bfd_mach_o_core_file_failing_command (bfd *abfd)
5559 {
5560 unsigned char *buf = NULL;
5561 unsigned int len = 0;
5562 int ret;
5563
5564 ret = bfd_mach_o_core_fetch_environment (abfd, &buf, &len);
5565 if (ret < 0)
5566 return NULL;
5567
5568 return (char *) buf;
5569 }
5570
5571 int
5572 bfd_mach_o_core_file_failing_signal (bfd *abfd ATTRIBUTE_UNUSED)
5573 {
5574 return 0;
5575 }
5576
5577 static bfd_mach_o_uuid_command *
5578 bfd_mach_o_lookup_uuid_command (bfd *abfd)
5579 {
5580 bfd_mach_o_load_command *uuid_cmd;
5581 int ncmd = bfd_mach_o_lookup_command (abfd, BFD_MACH_O_LC_UUID, &uuid_cmd);
5582 if (ncmd != 1)
5583 return FALSE;
5584 return &uuid_cmd->command.uuid;
5585 }
5586
5587 /* Return true if ABFD is a dSYM file and its UUID matches UUID_CMD. */
5588
5589 static bfd_boolean
5590 bfd_mach_o_dsym_for_uuid_p (bfd *abfd, const bfd_mach_o_uuid_command *uuid_cmd)
5591 {
5592 bfd_mach_o_uuid_command *dsym_uuid_cmd;
5593
5594 BFD_ASSERT (abfd);
5595 BFD_ASSERT (uuid_cmd);
5596
5597 if (!bfd_check_format (abfd, bfd_object))
5598 return FALSE;
5599
5600 if (bfd_get_flavour (abfd) != bfd_target_mach_o_flavour
5601 || bfd_mach_o_get_data (abfd) == NULL
5602 || bfd_mach_o_get_data (abfd)->header.filetype != BFD_MACH_O_MH_DSYM)
5603 return FALSE;
5604
5605 dsym_uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd);
5606 if (dsym_uuid_cmd == NULL)
5607 return FALSE;
5608
5609 if (memcmp (uuid_cmd->uuid, dsym_uuid_cmd->uuid,
5610 sizeof (uuid_cmd->uuid)) != 0)
5611 return FALSE;
5612
5613 return TRUE;
5614 }
5615
5616 /* Find a BFD in DSYM_FILENAME which matches ARCH and UUID_CMD.
5617 The caller is responsible for closing the returned BFD object and
5618 its my_archive if the returned BFD is in a fat dSYM. */
5619
5620 static bfd *
5621 bfd_mach_o_find_dsym (const char *dsym_filename,
5622 const bfd_mach_o_uuid_command *uuid_cmd,
5623 const bfd_arch_info_type *arch)
5624 {
5625 bfd *base_dsym_bfd, *dsym_bfd;
5626
5627 BFD_ASSERT (uuid_cmd);
5628
5629 base_dsym_bfd = bfd_openr (dsym_filename, NULL);
5630 if (base_dsym_bfd == NULL)
5631 return NULL;
5632
5633 dsym_bfd = bfd_mach_o_fat_extract (base_dsym_bfd, bfd_object, arch);
5634 if (bfd_mach_o_dsym_for_uuid_p (dsym_bfd, uuid_cmd))
5635 return dsym_bfd;
5636
5637 bfd_close (dsym_bfd);
5638 if (base_dsym_bfd != dsym_bfd)
5639 bfd_close (base_dsym_bfd);
5640
5641 return NULL;
5642 }
5643
5644 /* Return a BFD created from a dSYM file for ABFD.
5645 The caller is responsible for closing the returned BFD object, its
5646 filename, and its my_archive if the returned BFD is in a fat dSYM. */
5647
5648 static bfd *
5649 bfd_mach_o_follow_dsym (bfd *abfd)
5650 {
5651 char *dsym_filename;
5652 bfd_mach_o_uuid_command *uuid_cmd;
5653 bfd *dsym_bfd, *base_bfd = abfd;
5654 const char *base_basename;
5655
5656 if (abfd == NULL || bfd_get_flavour (abfd) != bfd_target_mach_o_flavour)
5657 return NULL;
5658
5659 if (abfd->my_archive)
5660 base_bfd = abfd->my_archive;
5661 /* BFD may have been opened from a stream. */
5662 if (base_bfd->filename == NULL)
5663 {
5664 bfd_set_error (bfd_error_invalid_operation);
5665 return NULL;
5666 }
5667 base_basename = lbasename (base_bfd->filename);
5668
5669 uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd);
5670 if (uuid_cmd == NULL)
5671 return NULL;
5672
5673 /* TODO: We assume the DWARF file has the same as the binary's.
5674 It seems apple's GDB checks all files in the dSYM bundle directory.
5675 http://opensource.apple.com/source/gdb/gdb-1708/src/gdb/macosx/macosx-tdep.c
5676 */
5677 dsym_filename = (char *)bfd_malloc (strlen (base_bfd->filename)
5678 + strlen (dsym_subdir) + 1
5679 + strlen (base_basename) + 1);
5680 sprintf (dsym_filename, "%s%s/%s",
5681 base_bfd->filename, dsym_subdir, base_basename);
5682
5683 dsym_bfd = bfd_mach_o_find_dsym (dsym_filename, uuid_cmd,
5684 bfd_get_arch_info (abfd));
5685 if (dsym_bfd == NULL)
5686 free (dsym_filename);
5687
5688 return dsym_bfd;
5689 }
5690
5691 bfd_boolean
5692 bfd_mach_o_find_nearest_line (bfd *abfd,
5693 asymbol **symbols,
5694 asection *section,
5695 bfd_vma offset,
5696 const char **filename_ptr,
5697 const char **functionname_ptr,
5698 unsigned int *line_ptr,
5699 unsigned int *discriminator_ptr)
5700 {
5701 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5702 if (mdata == NULL)
5703 return FALSE;
5704 switch (mdata->header.filetype)
5705 {
5706 case BFD_MACH_O_MH_OBJECT:
5707 break;
5708 case BFD_MACH_O_MH_EXECUTE:
5709 case BFD_MACH_O_MH_DYLIB:
5710 case BFD_MACH_O_MH_BUNDLE:
5711 case BFD_MACH_O_MH_KEXT_BUNDLE:
5712 if (mdata->dwarf2_find_line_info == NULL)
5713 {
5714 mdata->dsym_bfd = bfd_mach_o_follow_dsym (abfd);
5715 /* When we couldn't find dSYM for this binary, we look for
5716 the debug information in the binary itself. In this way,
5717 we won't try finding separated dSYM again because
5718 mdata->dwarf2_find_line_info will be filled. */
5719 if (! mdata->dsym_bfd)
5720 break;
5721 if (! _bfd_dwarf2_slurp_debug_info (abfd, mdata->dsym_bfd,
5722 dwarf_debug_sections, symbols,
5723 &mdata->dwarf2_find_line_info,
5724 FALSE))
5725 return FALSE;
5726 }
5727 break;
5728 default:
5729 return FALSE;
5730 }
5731 return _bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset,
5732 filename_ptr, functionname_ptr,
5733 line_ptr, discriminator_ptr,
5734 dwarf_debug_sections, 0,
5735 &mdata->dwarf2_find_line_info);
5736 }
5737
5738 bfd_boolean
5739 bfd_mach_o_close_and_cleanup (bfd *abfd)
5740 {
5741 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5742 if (bfd_get_format (abfd) == bfd_object && mdata != NULL)
5743 {
5744 _bfd_dwarf2_cleanup_debug_info (abfd, &mdata->dwarf2_find_line_info);
5745 bfd_mach_o_free_cached_info (abfd);
5746 if (mdata->dsym_bfd != NULL)
5747 {
5748 bfd *fat_bfd = mdata->dsym_bfd->my_archive;
5749 char *dsym_filename = (char *)(fat_bfd
5750 ? fat_bfd->filename
5751 : mdata->dsym_bfd->filename);
5752 bfd_close (mdata->dsym_bfd);
5753 mdata->dsym_bfd = NULL;
5754 if (fat_bfd)
5755 bfd_close (fat_bfd);
5756 free (dsym_filename);
5757 }
5758 }
5759
5760 if (bfd_get_format (abfd) == bfd_archive
5761 && abfd->xvec == &mach_o_fat_vec)
5762 return TRUE;
5763 return _bfd_generic_close_and_cleanup (abfd);
5764 }
5765
5766 bfd_boolean bfd_mach_o_free_cached_info (bfd *abfd)
5767 {
5768 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5769 asection *asect;
5770 free (mdata->dyn_reloc_cache);
5771 mdata->dyn_reloc_cache = NULL;
5772 for (asect = abfd->sections; asect != NULL; asect = asect->next)
5773 {
5774 free (asect->relocation);
5775 asect->relocation = NULL;
5776 }
5777
5778 return TRUE;
5779 }
5780
5781 #define bfd_mach_o_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
5782 #define bfd_mach_o_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_lookup
5783
5784 #define bfd_mach_o_swap_reloc_in NULL
5785 #define bfd_mach_o_swap_reloc_out NULL
5786 #define bfd_mach_o_print_thread NULL
5787 #define bfd_mach_o_tgt_seg_table NULL
5788 #define bfd_mach_o_section_type_valid_for_tgt NULL
5789
5790 #define TARGET_NAME mach_o_be_vec
5791 #define TARGET_STRING "mach-o-be"
5792 #define TARGET_ARCHITECTURE bfd_arch_unknown
5793 #define TARGET_PAGESIZE 1
5794 #define TARGET_BIG_ENDIAN 1
5795 #define TARGET_ARCHIVE 0
5796 #define TARGET_PRIORITY 1
5797 #include "mach-o-target.c"
5798
5799 #undef TARGET_NAME
5800 #undef TARGET_STRING
5801 #undef TARGET_ARCHITECTURE
5802 #undef TARGET_PAGESIZE
5803 #undef TARGET_BIG_ENDIAN
5804 #undef TARGET_ARCHIVE
5805 #undef TARGET_PRIORITY
5806
5807 #define TARGET_NAME mach_o_le_vec
5808 #define TARGET_STRING "mach-o-le"
5809 #define TARGET_ARCHITECTURE bfd_arch_unknown
5810 #define TARGET_PAGESIZE 1
5811 #define TARGET_BIG_ENDIAN 0
5812 #define TARGET_ARCHIVE 0
5813 #define TARGET_PRIORITY 1
5814
5815 #include "mach-o-target.c"
5816
5817 #undef TARGET_NAME
5818 #undef TARGET_STRING
5819 #undef TARGET_ARCHITECTURE
5820 #undef TARGET_PAGESIZE
5821 #undef TARGET_BIG_ENDIAN
5822 #undef TARGET_ARCHIVE
5823 #undef TARGET_PRIORITY
5824
5825 /* Not yet handled: creating an archive. */
5826 #define bfd_mach_o_mkarchive _bfd_noarchive_mkarchive
5827
5828 /* Not used. */
5829 #define bfd_mach_o_read_ar_hdr _bfd_noarchive_read_ar_hdr
5830 #define bfd_mach_o_write_ar_hdr _bfd_noarchive_write_ar_hdr
5831 #define bfd_mach_o_slurp_armap _bfd_noarchive_slurp_armap
5832 #define bfd_mach_o_slurp_extended_name_table _bfd_noarchive_slurp_extended_name_table
5833 #define bfd_mach_o_construct_extended_name_table _bfd_noarchive_construct_extended_name_table
5834 #define bfd_mach_o_truncate_arname _bfd_noarchive_truncate_arname
5835 #define bfd_mach_o_write_armap _bfd_noarchive_write_armap
5836 #define bfd_mach_o_get_elt_at_index _bfd_noarchive_get_elt_at_index
5837 #define bfd_mach_o_generic_stat_arch_elt bfd_mach_o_fat_stat_arch_elt
5838 #define bfd_mach_o_update_armap_timestamp _bfd_noarchive_update_armap_timestamp
5839
5840 #define TARGET_NAME mach_o_fat_vec
5841 #define TARGET_STRING "mach-o-fat"
5842 #define TARGET_ARCHITECTURE bfd_arch_unknown
5843 #define TARGET_PAGESIZE 1
5844 #define TARGET_BIG_ENDIAN 1
5845 #define TARGET_ARCHIVE 1
5846 #define TARGET_PRIORITY 0
5847
5848 #include "mach-o-target.c"
5849
5850 #undef TARGET_NAME
5851 #undef TARGET_STRING
5852 #undef TARGET_ARCHITECTURE
5853 #undef TARGET_PAGESIZE
5854 #undef TARGET_BIG_ENDIAN
5855 #undef TARGET_ARCHIVE
5856 #undef TARGET_PRIORITY
GDB Binutils - Deliverables
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