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mach-o cleanup: remove useless calls to bfd_seek.
[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) -1U << (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 /* PR 17512L: file: 730e492d. */
694 else
695 {
696 ody->rebase_size =
697 ody->bind_size =
698 ody->weak_bind_size =
699 ody->lazy_bind_size =
700 ody->export_size = 0;
701 ody->rebase_content =
702 ody->bind_content =
703 ody->weak_bind_content =
704 ody->lazy_bind_content =
705 ody->export_content = NULL;
706 }
707 }
708 break;
709
710 default:
711 /* That command should be handled. */
712 abort ();
713 }
714
715 /* Insert command. */
716 bfd_mach_o_append_command (obfd, ocmd);
717 }
718
719 return TRUE;
720 }
721
722 /* This allows us to set up to 32 bits of flags (unless we invent some
723 fiendish scheme to subdivide). For now, we'll just set the file flags
724 without error checking - just overwrite. */
725
726 bfd_boolean
727 bfd_mach_o_bfd_set_private_flags (bfd *abfd, flagword flags)
728 {
729 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
730
731 if (!mdata)
732 return FALSE;
733
734 mdata->header.flags = flags;
735 return TRUE;
736 }
737
738 /* Count the total number of symbols. */
739
740 static long
741 bfd_mach_o_count_symbols (bfd *abfd)
742 {
743 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
744
745 if (mdata->symtab == NULL)
746 return 0;
747 return mdata->symtab->nsyms;
748 }
749
750 long
751 bfd_mach_o_get_symtab_upper_bound (bfd *abfd)
752 {
753 long nsyms = bfd_mach_o_count_symbols (abfd);
754
755 return ((nsyms + 1) * sizeof (asymbol *));
756 }
757
758 long
759 bfd_mach_o_canonicalize_symtab (bfd *abfd, asymbol **alocation)
760 {
761 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
762 long nsyms = bfd_mach_o_count_symbols (abfd);
763 bfd_mach_o_symtab_command *sym = mdata->symtab;
764 unsigned long j;
765
766 if (nsyms < 0)
767 return nsyms;
768
769 if (nsyms == 0)
770 {
771 /* Do not try to read symbols if there are none. */
772 alocation[0] = NULL;
773 return 0;
774 }
775
776 if (!bfd_mach_o_read_symtab_symbols (abfd))
777 {
778 (*_bfd_error_handler)
779 (_("bfd_mach_o_canonicalize_symtab: unable to load symbols"));
780 return 0;
781 }
782
783 BFD_ASSERT (sym->symbols != NULL);
784
785 for (j = 0; j < sym->nsyms; j++)
786 alocation[j] = &sym->symbols[j].symbol;
787
788 alocation[j] = NULL;
789
790 return nsyms;
791 }
792
793 /* Create synthetic symbols for indirect symbols. */
794
795 long
796 bfd_mach_o_get_synthetic_symtab (bfd *abfd,
797 long symcount ATTRIBUTE_UNUSED,
798 asymbol **syms ATTRIBUTE_UNUSED,
799 long dynsymcount ATTRIBUTE_UNUSED,
800 asymbol **dynsyms ATTRIBUTE_UNUSED,
801 asymbol **ret)
802 {
803 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
804 bfd_mach_o_dysymtab_command *dysymtab = mdata->dysymtab;
805 bfd_mach_o_symtab_command *symtab = mdata->symtab;
806 asymbol *s;
807 char * s_start;
808 char * s_end;
809 unsigned long count, i, j, n;
810 size_t size;
811 char *names;
812 char *nul_name;
813 const char stub [] = "$stub";
814
815 *ret = NULL;
816
817 /* Stop now if no symbols or no indirect symbols. */
818 if (dysymtab == NULL || dysymtab->nindirectsyms == 0
819 || symtab == NULL || symtab->symbols == NULL)
820 return 0;
821
822 /* We need to allocate a bfd symbol for every indirect symbol and to
823 allocate the memory for its name. */
824 count = dysymtab->nindirectsyms;
825 size = count * sizeof (asymbol) + 1;
826
827 for (j = 0; j < count; j++)
828 {
829 const char * strng;
830 unsigned int isym = dysymtab->indirect_syms[j];
831
832 /* Some indirect symbols are anonymous. */
833 if (isym < symtab->nsyms && (strng = symtab->symbols[isym].symbol.name))
834 /* PR 17512: file: f5b8eeba. */
835 size += strnlen (strng, symtab->strsize - (strng - symtab->strtab)) + sizeof (stub);
836 }
837
838 s_start = bfd_malloc (size);
839 s = *ret = (asymbol *) s_start;
840 if (s == NULL)
841 return -1;
842 names = (char *) (s + count);
843 nul_name = names;
844 *names++ = 0;
845 s_end = s_start + size;
846
847 n = 0;
848 for (i = 0; i < mdata->nsects; i++)
849 {
850 bfd_mach_o_section *sec = mdata->sections[i];
851 unsigned int first, last;
852 bfd_vma addr;
853 bfd_vma entry_size;
854
855 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
856 {
857 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
858 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
859 case BFD_MACH_O_S_SYMBOL_STUBS:
860 /* Only these sections have indirect symbols. */
861 first = sec->reserved1;
862 last = first + bfd_mach_o_section_get_nbr_indirect (abfd, sec);
863 addr = sec->addr;
864 entry_size = bfd_mach_o_section_get_entry_size (abfd, sec);
865
866 /* PR 17512: file: 08e15eec. */
867 if (first >= count || last >= count || first > last)
868 goto fail;
869
870 for (j = first; j < last; j++)
871 {
872 unsigned int isym = dysymtab->indirect_syms[j];
873
874 /* PR 17512: file: 04d64d9b. */
875 if (((char *) s) + sizeof (* s) > s_end)
876 goto fail;
877
878 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
879 s->section = sec->bfdsection;
880 s->value = addr - sec->addr;
881 s->udata.p = NULL;
882
883 if (isym < symtab->nsyms
884 && symtab->symbols[isym].symbol.name)
885 {
886 const char *sym = symtab->symbols[isym].symbol.name;
887 size_t len;
888
889 s->name = names;
890 len = strlen (sym);
891 /* PR 17512: file: 47dfd4d2. */
892 if (names + len >= s_end)
893 goto fail;
894 memcpy (names, sym, len);
895 names += len;
896 /* PR 17512: file: 18f340a4. */
897 if (names + sizeof (stub) >= s_end)
898 goto fail;
899 memcpy (names, stub, sizeof (stub));
900 names += sizeof (stub);
901 }
902 else
903 s->name = nul_name;
904
905 addr += entry_size;
906 s++;
907 n++;
908 }
909 break;
910 default:
911 break;
912 }
913 }
914
915 return n;
916
917 fail:
918 free (s_start);
919 * ret = NULL;
920 return -1;
921 }
922
923 void
924 bfd_mach_o_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
925 asymbol *symbol,
926 symbol_info *ret)
927 {
928 bfd_symbol_info (symbol, ret);
929 }
930
931 void
932 bfd_mach_o_print_symbol (bfd *abfd,
933 void * afile,
934 asymbol *symbol,
935 bfd_print_symbol_type how)
936 {
937 FILE *file = (FILE *) afile;
938 const char *name;
939 bfd_mach_o_asymbol *asym = (bfd_mach_o_asymbol *)symbol;
940
941 switch (how)
942 {
943 case bfd_print_symbol_name:
944 fprintf (file, "%s", symbol->name);
945 break;
946 default:
947 bfd_print_symbol_vandf (abfd, (void *) file, symbol);
948 if (asym->n_type & BFD_MACH_O_N_STAB)
949 name = bfd_get_stab_name (asym->n_type);
950 else
951 switch (asym->n_type & BFD_MACH_O_N_TYPE)
952 {
953 case BFD_MACH_O_N_UNDF:
954 if (symbol->value == 0)
955 name = "UND";
956 else
957 name = "COM";
958 break;
959 case BFD_MACH_O_N_ABS:
960 name = "ABS";
961 break;
962 case BFD_MACH_O_N_INDR:
963 name = "INDR";
964 break;
965 case BFD_MACH_O_N_PBUD:
966 name = "PBUD";
967 break;
968 case BFD_MACH_O_N_SECT:
969 name = "SECT";
970 break;
971 default:
972 name = "???";
973 break;
974 }
975 if (name == NULL)
976 name = "";
977 fprintf (file, " %02x %-6s %02x %04x",
978 asym->n_type, name, asym->n_sect, asym->n_desc);
979 if ((asym->n_type & BFD_MACH_O_N_STAB) == 0
980 && (asym->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_SECT)
981 fprintf (file, " [%s]", symbol->section->name);
982 fprintf (file, " %s", symbol->name);
983 }
984 }
985
986 static void
987 bfd_mach_o_convert_architecture (bfd_mach_o_cpu_type mtype,
988 bfd_mach_o_cpu_subtype msubtype,
989 enum bfd_architecture *type,
990 unsigned long *subtype)
991 {
992 *subtype = bfd_arch_unknown;
993
994 switch (mtype)
995 {
996 case BFD_MACH_O_CPU_TYPE_VAX:
997 *type = bfd_arch_vax;
998 break;
999 case BFD_MACH_O_CPU_TYPE_MC680x0:
1000 *type = bfd_arch_m68k;
1001 break;
1002 case BFD_MACH_O_CPU_TYPE_I386:
1003 *type = bfd_arch_i386;
1004 *subtype = bfd_mach_i386_i386;
1005 break;
1006 case BFD_MACH_O_CPU_TYPE_X86_64:
1007 *type = bfd_arch_i386;
1008 *subtype = bfd_mach_x86_64;
1009 break;
1010 case BFD_MACH_O_CPU_TYPE_MIPS:
1011 *type = bfd_arch_mips;
1012 break;
1013 case BFD_MACH_O_CPU_TYPE_MC98000:
1014 *type = bfd_arch_m98k;
1015 break;
1016 case BFD_MACH_O_CPU_TYPE_HPPA:
1017 *type = bfd_arch_hppa;
1018 break;
1019 case BFD_MACH_O_CPU_TYPE_ARM:
1020 *type = bfd_arch_arm;
1021 switch (msubtype)
1022 {
1023 case BFD_MACH_O_CPU_SUBTYPE_ARM_V4T:
1024 *subtype = bfd_mach_arm_4T;
1025 break;
1026 case BFD_MACH_O_CPU_SUBTYPE_ARM_V6:
1027 *subtype = bfd_mach_arm_4T; /* Best fit ? */
1028 break;
1029 case BFD_MACH_O_CPU_SUBTYPE_ARM_V5TEJ:
1030 *subtype = bfd_mach_arm_5TE;
1031 break;
1032 case BFD_MACH_O_CPU_SUBTYPE_ARM_XSCALE:
1033 *subtype = bfd_mach_arm_XScale;
1034 break;
1035 case BFD_MACH_O_CPU_SUBTYPE_ARM_V7:
1036 *subtype = bfd_mach_arm_5TE; /* Best fit ? */
1037 break;
1038 case BFD_MACH_O_CPU_SUBTYPE_ARM_ALL:
1039 default:
1040 break;
1041 }
1042 break;
1043 case BFD_MACH_O_CPU_TYPE_MC88000:
1044 *type = bfd_arch_m88k;
1045 break;
1046 case BFD_MACH_O_CPU_TYPE_SPARC:
1047 *type = bfd_arch_sparc;
1048 *subtype = bfd_mach_sparc;
1049 break;
1050 case BFD_MACH_O_CPU_TYPE_I860:
1051 *type = bfd_arch_i860;
1052 break;
1053 case BFD_MACH_O_CPU_TYPE_ALPHA:
1054 *type = bfd_arch_alpha;
1055 break;
1056 case BFD_MACH_O_CPU_TYPE_POWERPC:
1057 *type = bfd_arch_powerpc;
1058 *subtype = bfd_mach_ppc;
1059 break;
1060 case BFD_MACH_O_CPU_TYPE_POWERPC_64:
1061 *type = bfd_arch_powerpc;
1062 *subtype = bfd_mach_ppc64;
1063 break;
1064 case BFD_MACH_O_CPU_TYPE_ARM64:
1065 *type = bfd_arch_aarch64;
1066 *subtype = bfd_mach_aarch64;
1067 break;
1068 default:
1069 *type = bfd_arch_unknown;
1070 break;
1071 }
1072 }
1073
1074 /* Write n NUL bytes to ABFD so that LEN + n is a multiple of 4. Return the
1075 number of bytes written or -1 in case of error. */
1076
1077 static int
1078 bfd_mach_o_pad4 (bfd *abfd, unsigned int len)
1079 {
1080 if (len % 4 != 0)
1081 {
1082 char pad[4] = {0,0,0,0};
1083 unsigned int padlen = 4 - (len % 4);
1084
1085 if (bfd_bwrite (pad, padlen, abfd) != padlen)
1086 return -1;
1087
1088 return padlen;
1089 }
1090 else
1091 return 0;
1092 }
1093
1094 /* Likewise, but for a command. */
1095
1096 static int
1097 bfd_mach_o_pad_command (bfd *abfd, unsigned int len)
1098 {
1099 unsigned int align = bfd_mach_o_wide_p (abfd) ? 8 : 4;
1100
1101 if (len % align != 0)
1102 {
1103 char pad[8] = {0};
1104 unsigned int padlen = align - (len % align);
1105
1106 if (bfd_bwrite (pad, padlen, abfd) != padlen)
1107 return -1;
1108
1109 return padlen;
1110 }
1111 else
1112 return 0;
1113 }
1114
1115 static bfd_boolean
1116 bfd_mach_o_write_header (bfd *abfd, bfd_mach_o_header *header)
1117 {
1118 struct mach_o_header_external raw;
1119 unsigned int size;
1120
1121 size = mach_o_wide_p (header) ?
1122 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
1123
1124 bfd_h_put_32 (abfd, header->magic, raw.magic);
1125 bfd_h_put_32 (abfd, header->cputype, raw.cputype);
1126 bfd_h_put_32 (abfd, header->cpusubtype, raw.cpusubtype);
1127 bfd_h_put_32 (abfd, header->filetype, raw.filetype);
1128 bfd_h_put_32 (abfd, header->ncmds, raw.ncmds);
1129 bfd_h_put_32 (abfd, header->sizeofcmds, raw.sizeofcmds);
1130 bfd_h_put_32 (abfd, header->flags, raw.flags);
1131
1132 if (mach_o_wide_p (header))
1133 bfd_h_put_32 (abfd, header->reserved, raw.reserved);
1134
1135 if (bfd_seek (abfd, 0, SEEK_SET) != 0
1136 || bfd_bwrite (&raw, size, abfd) != size)
1137 return FALSE;
1138
1139 return TRUE;
1140 }
1141
1142 static bfd_boolean
1143 bfd_mach_o_write_thread (bfd *abfd, bfd_mach_o_load_command *command)
1144 {
1145 bfd_mach_o_thread_command *cmd = &command->command.thread;
1146 unsigned int i;
1147 struct mach_o_thread_command_external raw;
1148 unsigned int offset;
1149
1150 BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD)
1151 || (command->type == BFD_MACH_O_LC_UNIXTHREAD));
1152
1153 offset = BFD_MACH_O_LC_SIZE;
1154 for (i = 0; i < cmd->nflavours; i++)
1155 {
1156 BFD_ASSERT ((cmd->flavours[i].size % 4) == 0);
1157 BFD_ASSERT (cmd->flavours[i].offset ==
1158 (command->offset + offset + BFD_MACH_O_LC_SIZE));
1159
1160 bfd_h_put_32 (abfd, cmd->flavours[i].flavour, raw.flavour);
1161 bfd_h_put_32 (abfd, (cmd->flavours[i].size / 4), raw.count);
1162
1163 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
1164 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1165 return FALSE;
1166
1167 offset += cmd->flavours[i].size + sizeof (raw);
1168 }
1169
1170 return TRUE;
1171 }
1172
1173 static bfd_boolean
1174 bfd_mach_o_write_dylinker (bfd *abfd, bfd_mach_o_load_command *command)
1175 {
1176 bfd_mach_o_dylinker_command *cmd = &command->command.dylinker;
1177 struct mach_o_str_command_external raw;
1178 unsigned int namelen;
1179
1180 bfd_h_put_32 (abfd, cmd->name_offset, raw.str);
1181
1182 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1183 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1184 return FALSE;
1185
1186 namelen = strlen (cmd->name_str) + 1;
1187 if (bfd_bwrite (cmd->name_str, namelen, abfd) != namelen)
1188 return FALSE;
1189
1190 if (bfd_mach_o_pad_command (abfd, namelen) < 0)
1191 return FALSE;
1192
1193 return TRUE;
1194 }
1195
1196 static bfd_boolean
1197 bfd_mach_o_write_dylib (bfd *abfd, bfd_mach_o_load_command *command)
1198 {
1199 bfd_mach_o_dylib_command *cmd = &command->command.dylib;
1200 struct mach_o_dylib_command_external raw;
1201 unsigned int namelen;
1202
1203 bfd_h_put_32 (abfd, cmd->name_offset, raw.name);
1204 bfd_h_put_32 (abfd, cmd->timestamp, raw.timestamp);
1205 bfd_h_put_32 (abfd, cmd->current_version, raw.current_version);
1206 bfd_h_put_32 (abfd, cmd->compatibility_version, raw.compatibility_version);
1207
1208 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1209 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1210 return FALSE;
1211
1212 namelen = strlen (cmd->name_str) + 1;
1213 if (bfd_bwrite (cmd->name_str, namelen, abfd) != namelen)
1214 return FALSE;
1215
1216 if (bfd_mach_o_pad_command (abfd, namelen) < 0)
1217 return FALSE;
1218
1219 return TRUE;
1220 }
1221
1222 static bfd_boolean
1223 bfd_mach_o_write_main (bfd *abfd, bfd_mach_o_load_command *command)
1224 {
1225 bfd_mach_o_main_command *cmd = &command->command.main;
1226 struct mach_o_entry_point_command_external raw;
1227
1228 bfd_h_put_64 (abfd, cmd->entryoff, raw.entryoff);
1229 bfd_h_put_64 (abfd, cmd->stacksize, raw.stacksize);
1230
1231 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1232 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1233 return FALSE;
1234
1235 return TRUE;
1236 }
1237
1238 static bfd_boolean
1239 bfd_mach_o_write_dyld_info (bfd *abfd, bfd_mach_o_load_command *command)
1240 {
1241 bfd_mach_o_dyld_info_command *cmd = &command->command.dyld_info;
1242 struct mach_o_dyld_info_command_external raw;
1243
1244 bfd_h_put_32 (abfd, cmd->rebase_off, raw.rebase_off);
1245 bfd_h_put_32 (abfd, cmd->rebase_size, raw.rebase_size);
1246 bfd_h_put_32 (abfd, cmd->bind_off, raw.bind_off);
1247 bfd_h_put_32 (abfd, cmd->bind_size, raw.bind_size);
1248 bfd_h_put_32 (abfd, cmd->weak_bind_off, raw.weak_bind_off);
1249 bfd_h_put_32 (abfd, cmd->weak_bind_size, raw.weak_bind_size);
1250 bfd_h_put_32 (abfd, cmd->lazy_bind_off, raw.lazy_bind_off);
1251 bfd_h_put_32 (abfd, cmd->lazy_bind_size, raw.lazy_bind_size);
1252 bfd_h_put_32 (abfd, cmd->export_off, raw.export_off);
1253 bfd_h_put_32 (abfd, cmd->export_size, raw.export_size);
1254
1255 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1256 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1257 return FALSE;
1258
1259 if (cmd->rebase_size != 0)
1260 if (bfd_seek (abfd, cmd->rebase_off, SEEK_SET) != 0
1261 || (bfd_bwrite (cmd->rebase_content, cmd->rebase_size, abfd) !=
1262 cmd->rebase_size))
1263 return FALSE;
1264
1265 if (cmd->bind_size != 0)
1266 if (bfd_seek (abfd, cmd->bind_off, SEEK_SET) != 0
1267 || (bfd_bwrite (cmd->bind_content, cmd->bind_size, abfd) !=
1268 cmd->bind_size))
1269 return FALSE;
1270
1271 if (cmd->weak_bind_size != 0)
1272 if (bfd_seek (abfd, cmd->weak_bind_off, SEEK_SET) != 0
1273 || (bfd_bwrite (cmd->weak_bind_content, cmd->weak_bind_size, abfd) !=
1274 cmd->weak_bind_size))
1275 return FALSE;
1276
1277 if (cmd->lazy_bind_size != 0)
1278 if (bfd_seek (abfd, cmd->lazy_bind_off, SEEK_SET) != 0
1279 || (bfd_bwrite (cmd->lazy_bind_content, cmd->lazy_bind_size, abfd) !=
1280 cmd->lazy_bind_size))
1281 return FALSE;
1282
1283 if (cmd->export_size != 0)
1284 if (bfd_seek (abfd, cmd->export_off, SEEK_SET) != 0
1285 || (bfd_bwrite (cmd->export_content, cmd->export_size, abfd) !=
1286 cmd->export_size))
1287 return FALSE;
1288
1289 return TRUE;
1290 }
1291
1292 long
1293 bfd_mach_o_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
1294 asection *asect)
1295 {
1296 return (asect->reloc_count + 1) * sizeof (arelent *);
1297 }
1298
1299 /* In addition to the need to byte-swap the symbol number, the bit positions
1300 of the fields in the relocation information vary per target endian-ness. */
1301
1302 static void
1303 bfd_mach_o_swap_in_non_scattered_reloc (bfd *abfd, bfd_mach_o_reloc_info *rel,
1304 unsigned char *fields)
1305 {
1306 unsigned char info = fields[3];
1307
1308 if (bfd_big_endian (abfd))
1309 {
1310 rel->r_value = (fields[0] << 16) | (fields[1] << 8) | fields[2];
1311 rel->r_type = (info >> BFD_MACH_O_BE_TYPE_SHIFT) & BFD_MACH_O_TYPE_MASK;
1312 rel->r_pcrel = (info & BFD_MACH_O_BE_PCREL) ? 1 : 0;
1313 rel->r_length = (info >> BFD_MACH_O_BE_LENGTH_SHIFT)
1314 & BFD_MACH_O_LENGTH_MASK;
1315 rel->r_extern = (info & BFD_MACH_O_BE_EXTERN) ? 1 : 0;
1316 }
1317 else
1318 {
1319 rel->r_value = (fields[2] << 16) | (fields[1] << 8) | fields[0];
1320 rel->r_type = (info >> BFD_MACH_O_LE_TYPE_SHIFT) & BFD_MACH_O_TYPE_MASK;
1321 rel->r_pcrel = (info & BFD_MACH_O_LE_PCREL) ? 1 : 0;
1322 rel->r_length = (info >> BFD_MACH_O_LE_LENGTH_SHIFT)
1323 & BFD_MACH_O_LENGTH_MASK;
1324 rel->r_extern = (info & BFD_MACH_O_LE_EXTERN) ? 1 : 0;
1325 }
1326 }
1327
1328 static int
1329 bfd_mach_o_canonicalize_one_reloc (bfd *abfd,
1330 struct mach_o_reloc_info_external *raw,
1331 arelent *res, asymbol **syms)
1332 {
1333 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1334 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1335 bfd_mach_o_reloc_info reloc;
1336 bfd_vma addr;
1337 asymbol **sym;
1338
1339 addr = bfd_get_32 (abfd, raw->r_address);
1340 res->sym_ptr_ptr = NULL;
1341 res->addend = 0;
1342
1343 if (addr & BFD_MACH_O_SR_SCATTERED)
1344 {
1345 unsigned int j;
1346 bfd_vma symnum = bfd_get_32 (abfd, raw->r_symbolnum);
1347
1348 /* Scattered relocation, can't be extern. */
1349 reloc.r_scattered = 1;
1350 reloc.r_extern = 0;
1351
1352 /* Extract section and offset from r_value (symnum). */
1353 reloc.r_value = symnum;
1354 /* FIXME: This breaks when a symbol in a reloc exactly follows the
1355 end of the data for the section (e.g. in a calculation of section
1356 data length). At present, the symbol will end up associated with
1357 the following section or, if it falls within alignment padding, as
1358 null - which will assert later. */
1359 for (j = 0; j < mdata->nsects; j++)
1360 {
1361 bfd_mach_o_section *sect = mdata->sections[j];
1362 if (symnum >= sect->addr && symnum < sect->addr + sect->size)
1363 {
1364 res->sym_ptr_ptr = sect->bfdsection->symbol_ptr_ptr;
1365 res->addend = symnum - sect->addr;
1366 break;
1367 }
1368 }
1369
1370 /* Extract the info and address fields from r_address. */
1371 reloc.r_type = BFD_MACH_O_GET_SR_TYPE (addr);
1372 reloc.r_length = BFD_MACH_O_GET_SR_LENGTH (addr);
1373 reloc.r_pcrel = addr & BFD_MACH_O_SR_PCREL;
1374 reloc.r_address = BFD_MACH_O_GET_SR_TYPE (addr);
1375 res->address = BFD_MACH_O_GET_SR_ADDRESS (addr);
1376 }
1377 else
1378 {
1379 unsigned int num;
1380
1381 /* Non-scattered relocation. */
1382 reloc.r_scattered = 0;
1383
1384 /* The value and info fields have to be extracted dependent on target
1385 endian-ness. */
1386 bfd_mach_o_swap_in_non_scattered_reloc (abfd, &reloc, raw->r_symbolnum);
1387 num = reloc.r_value;
1388
1389 if (reloc.r_extern)
1390 {
1391 /* PR 17512: file: 8396-1185-0.004. */
1392 if (num >= (unsigned) bfd_mach_o_count_symbols (abfd))
1393 sym = bfd_und_section_ptr->symbol_ptr_ptr;
1394 else if (syms == NULL)
1395 sym = bfd_und_section_ptr->symbol_ptr_ptr;
1396 else
1397 /* An external symbol number. */
1398 sym = syms + num;
1399 }
1400 else if (num == 0x00ffffff || num == 0)
1401 {
1402 /* The 'symnum' in a non-scattered PAIR is 0x00ffffff. But as this
1403 is generic code, we don't know wether this is really a PAIR.
1404 This value is almost certainly not a valid section number, hence
1405 this specific case to avoid an assertion failure.
1406 Target specific swap_reloc_in routine should adjust that. */
1407 sym = bfd_abs_section_ptr->symbol_ptr_ptr;
1408 }
1409 else
1410 {
1411 /* PR 17512: file: 006-2964-0.004. */
1412 if (num > mdata->nsects)
1413 return -1;
1414
1415 /* A section number. */
1416 sym = mdata->sections[num - 1]->bfdsection->symbol_ptr_ptr;
1417 /* For a symbol defined in section S, the addend (stored in the
1418 binary) contains the address of the section. To comply with
1419 bfd convention, subtract the section address.
1420 Use the address from the header, so that the user can modify
1421 the vma of the section. */
1422 res->addend = -mdata->sections[num - 1]->addr;
1423 }
1424 /* Note: Pairs for PPC LO/HI/HA are not scattered, but contain the offset
1425 in the lower 16bits of the address value. So we have to find the
1426 'symbol' from the preceding reloc. We do this even though the
1427 section symbol is probably not needed here, because NULL symbol
1428 values cause an assert in generic BFD code. This must be done in
1429 the PPC swap_reloc_in routine. */
1430 res->sym_ptr_ptr = sym;
1431
1432 /* The 'address' is just r_address.
1433 ??? maybe this should be masked with 0xffffff for safety. */
1434 res->address = addr;
1435 reloc.r_address = addr;
1436 }
1437
1438 /* We have set up a reloc with all the information present, so the swapper
1439 can modify address, value and addend fields, if necessary, to convey
1440 information in the generic BFD reloc that is mach-o specific. */
1441
1442 if (!(*bed->_bfd_mach_o_swap_reloc_in)(res, &reloc))
1443 return -1;
1444
1445 return 0;
1446 }
1447
1448 static int
1449 bfd_mach_o_canonicalize_relocs (bfd *abfd, unsigned long filepos,
1450 unsigned long count,
1451 arelent *res, asymbol **syms)
1452 {
1453 unsigned long i;
1454 struct mach_o_reloc_info_external *native_relocs;
1455 bfd_size_type native_size;
1456
1457 /* Allocate and read relocs. */
1458 native_size = count * BFD_MACH_O_RELENT_SIZE;
1459
1460 /* PR 17512: file: 09477b57. */
1461 if (native_size < count)
1462 return -1;
1463
1464 native_relocs =
1465 (struct mach_o_reloc_info_external *) bfd_malloc (native_size);
1466 if (native_relocs == NULL)
1467 return -1;
1468
1469 if (bfd_seek (abfd, filepos, SEEK_SET) != 0
1470 || bfd_bread (native_relocs, native_size, abfd) != native_size)
1471 goto err;
1472
1473 for (i = 0; i < count; i++)
1474 {
1475 if (bfd_mach_o_canonicalize_one_reloc (abfd, &native_relocs[i],
1476 &res[i], syms) < 0)
1477 goto err;
1478 }
1479 free (native_relocs);
1480 return i;
1481 err:
1482 free (native_relocs);
1483 return -1;
1484 }
1485
1486 long
1487 bfd_mach_o_canonicalize_reloc (bfd *abfd, asection *asect,
1488 arelent **rels, asymbol **syms)
1489 {
1490 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1491 unsigned long i;
1492 arelent *res;
1493
1494 if (asect->reloc_count == 0)
1495 return 0;
1496
1497 /* No need to go further if we don't know how to read relocs. */
1498 if (bed->_bfd_mach_o_swap_reloc_in == NULL)
1499 return 0;
1500
1501 if (asect->relocation == NULL)
1502 {
1503 if (asect->reloc_count * sizeof (arelent) < asect->reloc_count)
1504 return -1;
1505 res = bfd_malloc (asect->reloc_count * sizeof (arelent));
1506 if (res == NULL)
1507 return -1;
1508
1509 if (bfd_mach_o_canonicalize_relocs (abfd, asect->rel_filepos,
1510 asect->reloc_count, res, syms) < 0)
1511 {
1512 free (res);
1513 return -1;
1514 }
1515 asect->relocation = res;
1516 }
1517
1518 res = asect->relocation;
1519 for (i = 0; i < asect->reloc_count; i++)
1520 rels[i] = &res[i];
1521 rels[i] = NULL;
1522
1523 return i;
1524 }
1525
1526 long
1527 bfd_mach_o_get_dynamic_reloc_upper_bound (bfd *abfd)
1528 {
1529 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1530
1531 if (mdata->dysymtab == NULL)
1532 return 1;
1533 return (mdata->dysymtab->nextrel + mdata->dysymtab->nlocrel + 1)
1534 * sizeof (arelent *);
1535 }
1536
1537 long
1538 bfd_mach_o_canonicalize_dynamic_reloc (bfd *abfd, arelent **rels,
1539 struct bfd_symbol **syms)
1540 {
1541 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1542 bfd_mach_o_dysymtab_command *dysymtab = mdata->dysymtab;
1543 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1544 unsigned long i;
1545 arelent *res;
1546
1547 if (dysymtab == NULL)
1548 return 0;
1549 if (dysymtab->nextrel == 0 && dysymtab->nlocrel == 0)
1550 return 0;
1551
1552 /* No need to go further if we don't know how to read relocs. */
1553 if (bed->_bfd_mach_o_swap_reloc_in == NULL)
1554 return 0;
1555
1556 if (mdata->dyn_reloc_cache == NULL)
1557 {
1558 if ((dysymtab->nextrel + dysymtab->nlocrel) * sizeof (arelent)
1559 < (dysymtab->nextrel + dysymtab->nlocrel))
1560 return -1;
1561
1562 res = bfd_malloc ((dysymtab->nextrel + dysymtab->nlocrel)
1563 * sizeof (arelent));
1564 if (res == NULL)
1565 return -1;
1566
1567 if (bfd_mach_o_canonicalize_relocs (abfd, dysymtab->extreloff,
1568 dysymtab->nextrel, res, syms) < 0)
1569 {
1570 free (res);
1571 return -1;
1572 }
1573
1574 if (bfd_mach_o_canonicalize_relocs (abfd, dysymtab->locreloff,
1575 dysymtab->nlocrel,
1576 res + dysymtab->nextrel, syms) < 0)
1577 {
1578 free (res);
1579 return -1;
1580 }
1581
1582 mdata->dyn_reloc_cache = res;
1583 }
1584
1585 res = mdata->dyn_reloc_cache;
1586 for (i = 0; i < dysymtab->nextrel + dysymtab->nlocrel; i++)
1587 rels[i] = &res[i];
1588 rels[i] = NULL;
1589 return i;
1590 }
1591
1592 /* In addition to the need to byte-swap the symbol number, the bit positions
1593 of the fields in the relocation information vary per target endian-ness. */
1594
1595 static void
1596 bfd_mach_o_swap_out_non_scattered_reloc (bfd *abfd, unsigned char *fields,
1597 bfd_mach_o_reloc_info *rel)
1598 {
1599 unsigned char info = 0;
1600
1601 BFD_ASSERT (rel->r_type <= 15);
1602 BFD_ASSERT (rel->r_length <= 3);
1603
1604 if (bfd_big_endian (abfd))
1605 {
1606 fields[0] = (rel->r_value >> 16) & 0xff;
1607 fields[1] = (rel->r_value >> 8) & 0xff;
1608 fields[2] = rel->r_value & 0xff;
1609 info |= rel->r_type << BFD_MACH_O_BE_TYPE_SHIFT;
1610 info |= rel->r_pcrel ? BFD_MACH_O_BE_PCREL : 0;
1611 info |= rel->r_length << BFD_MACH_O_BE_LENGTH_SHIFT;
1612 info |= rel->r_extern ? BFD_MACH_O_BE_EXTERN : 0;
1613 }
1614 else
1615 {
1616 fields[2] = (rel->r_value >> 16) & 0xff;
1617 fields[1] = (rel->r_value >> 8) & 0xff;
1618 fields[0] = rel->r_value & 0xff;
1619 info |= rel->r_type << BFD_MACH_O_LE_TYPE_SHIFT;
1620 info |= rel->r_pcrel ? BFD_MACH_O_LE_PCREL : 0;
1621 info |= rel->r_length << BFD_MACH_O_LE_LENGTH_SHIFT;
1622 info |= rel->r_extern ? BFD_MACH_O_LE_EXTERN : 0;
1623 }
1624 fields[3] = info;
1625 }
1626
1627 static bfd_boolean
1628 bfd_mach_o_write_relocs (bfd *abfd, bfd_mach_o_section *section)
1629 {
1630 unsigned int i;
1631 arelent **entries;
1632 asection *sec;
1633 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1634
1635 sec = section->bfdsection;
1636 if (sec->reloc_count == 0)
1637 return TRUE;
1638
1639 if (bed->_bfd_mach_o_swap_reloc_out == NULL)
1640 return TRUE;
1641
1642 if (bfd_seek (abfd, section->reloff, SEEK_SET) != 0)
1643 return FALSE;
1644
1645 /* Convert and write. */
1646 entries = section->bfdsection->orelocation;
1647 for (i = 0; i < section->nreloc; i++)
1648 {
1649 arelent *rel = entries[i];
1650 struct mach_o_reloc_info_external raw;
1651 bfd_mach_o_reloc_info info, *pinfo = &info;
1652
1653 /* Convert relocation to an intermediate representation. */
1654 if (!(*bed->_bfd_mach_o_swap_reloc_out) (rel, pinfo))
1655 return FALSE;
1656
1657 /* Lower the relocation info. */
1658 if (pinfo->r_scattered)
1659 {
1660 unsigned long v;
1661
1662 v = BFD_MACH_O_SR_SCATTERED
1663 | (pinfo->r_pcrel ? BFD_MACH_O_SR_PCREL : 0)
1664 | BFD_MACH_O_SET_SR_LENGTH (pinfo->r_length)
1665 | BFD_MACH_O_SET_SR_TYPE (pinfo->r_type)
1666 | BFD_MACH_O_SET_SR_ADDRESS (pinfo->r_address);
1667 /* Note: scattered relocs have field in reverse order... */
1668 bfd_put_32 (abfd, v, raw.r_address);
1669 bfd_put_32 (abfd, pinfo->r_value, raw.r_symbolnum);
1670 }
1671 else
1672 {
1673 bfd_put_32 (abfd, pinfo->r_address, raw.r_address);
1674 bfd_mach_o_swap_out_non_scattered_reloc (abfd, raw.r_symbolnum,
1675 pinfo);
1676 }
1677
1678 if (bfd_bwrite (&raw, BFD_MACH_O_RELENT_SIZE, abfd)
1679 != BFD_MACH_O_RELENT_SIZE)
1680 return FALSE;
1681 }
1682 return TRUE;
1683 }
1684
1685 static bfd_boolean
1686 bfd_mach_o_write_section_32 (bfd *abfd, bfd_mach_o_section *section)
1687 {
1688 struct mach_o_section_32_external raw;
1689
1690 memcpy (raw.sectname, section->sectname, 16);
1691 memcpy (raw.segname, section->segname, 16);
1692 bfd_h_put_32 (abfd, section->addr, raw.addr);
1693 bfd_h_put_32 (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
1702 if (bfd_bwrite (&raw, BFD_MACH_O_SECTION_SIZE, abfd)
1703 != BFD_MACH_O_SECTION_SIZE)
1704 return FALSE;
1705
1706 return TRUE;
1707 }
1708
1709 static bfd_boolean
1710 bfd_mach_o_write_section_64 (bfd *abfd, bfd_mach_o_section *section)
1711 {
1712 struct mach_o_section_64_external raw;
1713
1714 memcpy (raw.sectname, section->sectname, 16);
1715 memcpy (raw.segname, section->segname, 16);
1716 bfd_h_put_64 (abfd, section->addr, raw.addr);
1717 bfd_h_put_64 (abfd, section->size, raw.size);
1718 bfd_h_put_32 (abfd, section->offset, raw.offset);
1719 bfd_h_put_32 (abfd, section->align, raw.align);
1720 bfd_h_put_32 (abfd, section->reloff, raw.reloff);
1721 bfd_h_put_32 (abfd, section->nreloc, raw.nreloc);
1722 bfd_h_put_32 (abfd, section->flags, raw.flags);
1723 bfd_h_put_32 (abfd, section->reserved1, raw.reserved1);
1724 bfd_h_put_32 (abfd, section->reserved2, raw.reserved2);
1725 bfd_h_put_32 (abfd, section->reserved3, raw.reserved3);
1726
1727 if (bfd_bwrite (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd)
1728 != BFD_MACH_O_SECTION_64_SIZE)
1729 return FALSE;
1730
1731 return TRUE;
1732 }
1733
1734 static bfd_boolean
1735 bfd_mach_o_write_segment_32 (bfd *abfd, bfd_mach_o_load_command *command)
1736 {
1737 struct mach_o_segment_command_32_external raw;
1738 bfd_mach_o_segment_command *seg = &command->command.segment;
1739 bfd_mach_o_section *sec;
1740
1741 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT);
1742
1743 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1744 if (!bfd_mach_o_write_relocs (abfd, sec))
1745 return FALSE;
1746
1747 memcpy (raw.segname, seg->segname, 16);
1748 bfd_h_put_32 (abfd, seg->vmaddr, raw.vmaddr);
1749 bfd_h_put_32 (abfd, seg->vmsize, raw.vmsize);
1750 bfd_h_put_32 (abfd, seg->fileoff, raw.fileoff);
1751 bfd_h_put_32 (abfd, seg->filesize, raw.filesize);
1752 bfd_h_put_32 (abfd, seg->maxprot, raw.maxprot);
1753 bfd_h_put_32 (abfd, seg->initprot, raw.initprot);
1754 bfd_h_put_32 (abfd, seg->nsects, raw.nsects);
1755 bfd_h_put_32 (abfd, seg->flags, raw.flags);
1756
1757 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1758 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1759 return FALSE;
1760
1761 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1762 if (!bfd_mach_o_write_section_32 (abfd, sec))
1763 return FALSE;
1764
1765 return TRUE;
1766 }
1767
1768 static bfd_boolean
1769 bfd_mach_o_write_segment_64 (bfd *abfd, bfd_mach_o_load_command *command)
1770 {
1771 struct mach_o_segment_command_64_external raw;
1772 bfd_mach_o_segment_command *seg = &command->command.segment;
1773 bfd_mach_o_section *sec;
1774
1775 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64);
1776
1777 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1778 if (!bfd_mach_o_write_relocs (abfd, sec))
1779 return FALSE;
1780
1781 memcpy (raw.segname, seg->segname, 16);
1782 bfd_h_put_64 (abfd, seg->vmaddr, raw.vmaddr);
1783 bfd_h_put_64 (abfd, seg->vmsize, raw.vmsize);
1784 bfd_h_put_64 (abfd, seg->fileoff, raw.fileoff);
1785 bfd_h_put_64 (abfd, seg->filesize, raw.filesize);
1786 bfd_h_put_32 (abfd, seg->maxprot, raw.maxprot);
1787 bfd_h_put_32 (abfd, seg->initprot, raw.initprot);
1788 bfd_h_put_32 (abfd, seg->nsects, raw.nsects);
1789 bfd_h_put_32 (abfd, seg->flags, raw.flags);
1790
1791 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1792 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1793 return FALSE;
1794
1795 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1796 if (!bfd_mach_o_write_section_64 (abfd, sec))
1797 return FALSE;
1798
1799 return TRUE;
1800 }
1801
1802 static bfd_boolean
1803 bfd_mach_o_write_symtab_content (bfd *abfd, bfd_mach_o_symtab_command *sym)
1804 {
1805 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1806 unsigned long i;
1807 unsigned int wide = bfd_mach_o_wide_p (abfd);
1808 struct bfd_strtab_hash *strtab;
1809 asymbol **symbols = bfd_get_outsymbols (abfd);
1810 int padlen;
1811
1812 /* Write the symbols first. */
1813 if (bfd_seek (abfd, sym->symoff, SEEK_SET) != 0)
1814 return FALSE;
1815
1816 strtab = _bfd_stringtab_init ();
1817 if (strtab == NULL)
1818 return FALSE;
1819
1820 if (sym->nsyms > 0)
1821 /* Although we don't strictly need to do this, for compatibility with
1822 Darwin system tools, actually output an empty string for the index
1823 0 entry. */
1824 _bfd_stringtab_add (strtab, "", TRUE, FALSE);
1825
1826 for (i = 0; i < sym->nsyms; i++)
1827 {
1828 bfd_size_type str_index;
1829 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
1830
1831 if (s->symbol.name == 0 || s->symbol.name[0] == '\0')
1832 /* An index of 0 always means the empty string. */
1833 str_index = 0;
1834 else
1835 {
1836 str_index = _bfd_stringtab_add (strtab, s->symbol.name, TRUE, FALSE);
1837
1838 if (str_index == (bfd_size_type) -1)
1839 goto err;
1840 }
1841
1842 if (wide)
1843 {
1844 struct mach_o_nlist_64_external raw;
1845
1846 bfd_h_put_32 (abfd, str_index, raw.n_strx);
1847 bfd_h_put_8 (abfd, s->n_type, raw.n_type);
1848 bfd_h_put_8 (abfd, s->n_sect, raw.n_sect);
1849 bfd_h_put_16 (abfd, s->n_desc, raw.n_desc);
1850 bfd_h_put_64 (abfd, s->symbol.section->vma + s->symbol.value,
1851 raw.n_value);
1852
1853 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1854 goto err;
1855 }
1856 else
1857 {
1858 struct mach_o_nlist_external raw;
1859
1860 bfd_h_put_32 (abfd, str_index, raw.n_strx);
1861 bfd_h_put_8 (abfd, s->n_type, raw.n_type);
1862 bfd_h_put_8 (abfd, s->n_sect, raw.n_sect);
1863 bfd_h_put_16 (abfd, s->n_desc, raw.n_desc);
1864 bfd_h_put_32 (abfd, s->symbol.section->vma + s->symbol.value,
1865 raw.n_value);
1866
1867 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1868 goto err;
1869 }
1870 }
1871 sym->strsize = _bfd_stringtab_size (strtab);
1872 sym->stroff = mdata->filelen;
1873 mdata->filelen += sym->strsize;
1874
1875 if (bfd_seek (abfd, sym->stroff, SEEK_SET) != 0)
1876 goto err;
1877
1878 if (_bfd_stringtab_emit (abfd, strtab) != TRUE)
1879 goto err;
1880
1881 /* Pad string table. */
1882 padlen = bfd_mach_o_pad4 (abfd, sym->strsize);
1883 if (padlen < 0)
1884 return FALSE;
1885 mdata->filelen += padlen;
1886 sym->strsize += padlen;
1887
1888 return TRUE;
1889
1890 err:
1891 _bfd_stringtab_free (strtab);
1892 sym->strsize = 0;
1893 return FALSE;
1894 }
1895
1896 static bfd_boolean
1897 bfd_mach_o_write_symtab (bfd *abfd, bfd_mach_o_load_command *command)
1898 {
1899 bfd_mach_o_symtab_command *sym = &command->command.symtab;
1900 struct mach_o_symtab_command_external raw;
1901
1902 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB);
1903
1904 /* The command. */
1905 bfd_h_put_32 (abfd, sym->symoff, raw.symoff);
1906 bfd_h_put_32 (abfd, sym->nsyms, raw.nsyms);
1907 bfd_h_put_32 (abfd, sym->stroff, raw.stroff);
1908 bfd_h_put_32 (abfd, sym->strsize, raw.strsize);
1909
1910 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1911 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1912 return FALSE;
1913
1914 return TRUE;
1915 }
1916
1917 /* Count the number of indirect symbols in the image.
1918 Requires that the sections are in their final order. */
1919
1920 static unsigned int
1921 bfd_mach_o_count_indirect_symbols (bfd *abfd, bfd_mach_o_data_struct *mdata)
1922 {
1923 unsigned int i;
1924 unsigned int nisyms = 0;
1925
1926 for (i = 0; i < mdata->nsects; ++i)
1927 {
1928 bfd_mach_o_section *sec = mdata->sections[i];
1929
1930 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
1931 {
1932 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
1933 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
1934 case BFD_MACH_O_S_SYMBOL_STUBS:
1935 nisyms += bfd_mach_o_section_get_nbr_indirect (abfd, sec);
1936 break;
1937 default:
1938 break;
1939 }
1940 }
1941 return nisyms;
1942 }
1943
1944 /* Create the dysymtab. */
1945
1946 static bfd_boolean
1947 bfd_mach_o_build_dysymtab (bfd *abfd, bfd_mach_o_dysymtab_command *cmd)
1948 {
1949 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1950
1951 /* TODO:
1952 We are not going to try and fill these in yet and, moreover, we are
1953 going to bail if they are already set. */
1954 if (cmd->nmodtab != 0
1955 || cmd->ntoc != 0
1956 || cmd->nextrefsyms != 0)
1957 {
1958 (*_bfd_error_handler) (_("sorry: modtab, toc and extrefsyms are not yet"
1959 " implemented for dysymtab commands."));
1960 return FALSE;
1961 }
1962
1963 cmd->ilocalsym = 0;
1964
1965 if (bfd_get_symcount (abfd) > 0)
1966 {
1967 asymbol **symbols = bfd_get_outsymbols (abfd);
1968 unsigned long i;
1969
1970 /* Count the number of each kind of symbol. */
1971 for (i = 0; i < bfd_get_symcount (abfd); ++i)
1972 {
1973 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
1974 if (s->n_type & (BFD_MACH_O_N_EXT | BFD_MACH_O_N_PEXT))
1975 break;
1976 }
1977 cmd->nlocalsym = i;
1978 cmd->iextdefsym = i;
1979 for (; i < bfd_get_symcount (abfd); ++i)
1980 {
1981 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
1982 if ((s->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_UNDF)
1983 break;
1984 }
1985 cmd->nextdefsym = i - cmd->nlocalsym;
1986 cmd->iundefsym = cmd->nextdefsym + cmd->iextdefsym;
1987 cmd->nundefsym = bfd_get_symcount (abfd)
1988 - cmd->nlocalsym
1989 - cmd->nextdefsym;
1990 }
1991 else
1992 {
1993 cmd->nlocalsym = 0;
1994 cmd->iextdefsym = 0;
1995 cmd->nextdefsym = 0;
1996 cmd->iundefsym = 0;
1997 cmd->nundefsym = 0;
1998 }
1999
2000 cmd->nindirectsyms = bfd_mach_o_count_indirect_symbols (abfd, mdata);
2001 if (cmd->nindirectsyms > 0)
2002 {
2003 unsigned i;
2004 unsigned n;
2005
2006 mdata->filelen = FILE_ALIGN (mdata->filelen, 2);
2007 cmd->indirectsymoff = mdata->filelen;
2008 mdata->filelen += cmd->nindirectsyms * 4;
2009
2010 if (cmd->nindirectsyms * 4 < cmd->nindirectsyms)
2011 return FALSE;
2012 cmd->indirect_syms = bfd_zalloc (abfd, cmd->nindirectsyms * 4);
2013 if (cmd->indirect_syms == NULL)
2014 return FALSE;
2015
2016 n = 0;
2017 for (i = 0; i < mdata->nsects; ++i)
2018 {
2019 bfd_mach_o_section *sec = mdata->sections[i];
2020
2021 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2022 {
2023 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
2024 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
2025 case BFD_MACH_O_S_SYMBOL_STUBS:
2026 {
2027 unsigned j, num;
2028 bfd_mach_o_asymbol **isyms = sec->indirect_syms;
2029
2030 num = bfd_mach_o_section_get_nbr_indirect (abfd, sec);
2031 if (isyms == NULL || num == 0)
2032 break;
2033 /* Record the starting index in the reserved1 field. */
2034 sec->reserved1 = n;
2035 for (j = 0; j < num; j++, n++)
2036 {
2037 if (isyms[j] == NULL)
2038 cmd->indirect_syms[n] = BFD_MACH_O_INDIRECT_SYM_LOCAL;
2039 else if (isyms[j]->symbol.section == bfd_abs_section_ptr
2040 && ! (isyms[j]->n_type & BFD_MACH_O_N_EXT))
2041 cmd->indirect_syms[n] = BFD_MACH_O_INDIRECT_SYM_LOCAL
2042 | BFD_MACH_O_INDIRECT_SYM_ABS;
2043 else
2044 cmd->indirect_syms[n] = isyms[j]->symbol.udata.i;
2045 }
2046 }
2047 break;
2048 default:
2049 break;
2050 }
2051 }
2052 }
2053
2054 return TRUE;
2055 }
2056
2057 /* Write a dysymtab command.
2058 TODO: Possibly coalesce writes of smaller objects. */
2059
2060 static bfd_boolean
2061 bfd_mach_o_write_dysymtab (bfd *abfd, bfd_mach_o_load_command *command)
2062 {
2063 bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab;
2064
2065 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB);
2066
2067 if (cmd->nmodtab != 0)
2068 {
2069 unsigned int i;
2070
2071 if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0)
2072 return FALSE;
2073
2074 for (i = 0; i < cmd->nmodtab; i++)
2075 {
2076 bfd_mach_o_dylib_module *module = &cmd->dylib_module[i];
2077 unsigned int iinit;
2078 unsigned int ninit;
2079
2080 iinit = module->iinit & 0xffff;
2081 iinit |= ((module->iterm & 0xffff) << 16);
2082
2083 ninit = module->ninit & 0xffff;
2084 ninit |= ((module->nterm & 0xffff) << 16);
2085
2086 if (bfd_mach_o_wide_p (abfd))
2087 {
2088 struct mach_o_dylib_module_64_external w;
2089
2090 bfd_h_put_32 (abfd, module->module_name_idx, &w.module_name);
2091 bfd_h_put_32 (abfd, module->iextdefsym, &w.iextdefsym);
2092 bfd_h_put_32 (abfd, module->nextdefsym, &w.nextdefsym);
2093 bfd_h_put_32 (abfd, module->irefsym, &w.irefsym);
2094 bfd_h_put_32 (abfd, module->nrefsym, &w.nrefsym);
2095 bfd_h_put_32 (abfd, module->ilocalsym, &w.ilocalsym);
2096 bfd_h_put_32 (abfd, module->nlocalsym, &w.nlocalsym);
2097 bfd_h_put_32 (abfd, module->iextrel, &w.iextrel);
2098 bfd_h_put_32 (abfd, module->nextrel, &w.nextrel);
2099 bfd_h_put_32 (abfd, iinit, &w.iinit_iterm);
2100 bfd_h_put_32 (abfd, ninit, &w.ninit_nterm);
2101 bfd_h_put_64 (abfd, module->objc_module_info_addr,
2102 &w.objc_module_info_addr);
2103 bfd_h_put_32 (abfd, module->objc_module_info_size,
2104 &w.objc_module_info_size);
2105
2106 if (bfd_bwrite ((void *) &w, sizeof (w), abfd) != sizeof (w))
2107 return FALSE;
2108 }
2109 else
2110 {
2111 struct mach_o_dylib_module_external n;
2112
2113 bfd_h_put_32 (abfd, module->module_name_idx, &n.module_name);
2114 bfd_h_put_32 (abfd, module->iextdefsym, &n.iextdefsym);
2115 bfd_h_put_32 (abfd, module->nextdefsym, &n.nextdefsym);
2116 bfd_h_put_32 (abfd, module->irefsym, &n.irefsym);
2117 bfd_h_put_32 (abfd, module->nrefsym, &n.nrefsym);
2118 bfd_h_put_32 (abfd, module->ilocalsym, &n.ilocalsym);
2119 bfd_h_put_32 (abfd, module->nlocalsym, &n.nlocalsym);
2120 bfd_h_put_32 (abfd, module->iextrel, &n.iextrel);
2121 bfd_h_put_32 (abfd, module->nextrel, &n.nextrel);
2122 bfd_h_put_32 (abfd, iinit, &n.iinit_iterm);
2123 bfd_h_put_32 (abfd, ninit, &n.ninit_nterm);
2124 bfd_h_put_32 (abfd, module->objc_module_info_addr,
2125 &n.objc_module_info_addr);
2126 bfd_h_put_32 (abfd, module->objc_module_info_size,
2127 &n.objc_module_info_size);
2128
2129 if (bfd_bwrite ((void *) &n, sizeof (n), abfd) != sizeof (n))
2130 return FALSE;
2131 }
2132 }
2133 }
2134
2135 if (cmd->ntoc != 0)
2136 {
2137 unsigned int i;
2138
2139 if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0)
2140 return FALSE;
2141
2142 for (i = 0; i < cmd->ntoc; i++)
2143 {
2144 struct mach_o_dylib_table_of_contents_external raw;
2145 bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i];
2146
2147 bfd_h_put_32 (abfd, toc->symbol_index, &raw.symbol_index);
2148 bfd_h_put_32 (abfd, toc->module_index, &raw.module_index);
2149
2150 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
2151 return FALSE;
2152 }
2153 }
2154
2155 if (cmd->nindirectsyms > 0)
2156 {
2157 unsigned int i;
2158
2159 if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0)
2160 return FALSE;
2161
2162 for (i = 0; i < cmd->nindirectsyms; ++i)
2163 {
2164 unsigned char raw[4];
2165
2166 bfd_h_put_32 (abfd, cmd->indirect_syms[i], &raw);
2167 if (bfd_bwrite (raw, sizeof (raw), abfd) != sizeof (raw))
2168 return FALSE;
2169 }
2170 }
2171
2172 if (cmd->nextrefsyms != 0)
2173 {
2174 unsigned int i;
2175
2176 if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0)
2177 return FALSE;
2178
2179 for (i = 0; i < cmd->nextrefsyms; i++)
2180 {
2181 unsigned long v;
2182 unsigned char raw[4];
2183 bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i];
2184
2185 /* Fields isym and flags are written as bit-fields, thus we need
2186 a specific processing for endianness. */
2187
2188 if (bfd_big_endian (abfd))
2189 {
2190 v = ((ref->isym & 0xffffff) << 8);
2191 v |= ref->flags & 0xff;
2192 }
2193 else
2194 {
2195 v = ref->isym & 0xffffff;
2196 v |= ((ref->flags & 0xff) << 24);
2197 }
2198
2199 bfd_h_put_32 (abfd, v, raw);
2200 if (bfd_bwrite (raw, sizeof (raw), abfd) != sizeof (raw))
2201 return FALSE;
2202 }
2203 }
2204
2205 /* The command. */
2206 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0)
2207 return FALSE;
2208 else
2209 {
2210 struct mach_o_dysymtab_command_external raw;
2211
2212 bfd_h_put_32 (abfd, cmd->ilocalsym, &raw.ilocalsym);
2213 bfd_h_put_32 (abfd, cmd->nlocalsym, &raw.nlocalsym);
2214 bfd_h_put_32 (abfd, cmd->iextdefsym, &raw.iextdefsym);
2215 bfd_h_put_32 (abfd, cmd->nextdefsym, &raw.nextdefsym);
2216 bfd_h_put_32 (abfd, cmd->iundefsym, &raw.iundefsym);
2217 bfd_h_put_32 (abfd, cmd->nundefsym, &raw.nundefsym);
2218 bfd_h_put_32 (abfd, cmd->tocoff, &raw.tocoff);
2219 bfd_h_put_32 (abfd, cmd->ntoc, &raw.ntoc);
2220 bfd_h_put_32 (abfd, cmd->modtaboff, &raw.modtaboff);
2221 bfd_h_put_32 (abfd, cmd->nmodtab, &raw.nmodtab);
2222 bfd_h_put_32 (abfd, cmd->extrefsymoff, &raw.extrefsymoff);
2223 bfd_h_put_32 (abfd, cmd->nextrefsyms, &raw.nextrefsyms);
2224 bfd_h_put_32 (abfd, cmd->indirectsymoff, &raw.indirectsymoff);
2225 bfd_h_put_32 (abfd, cmd->nindirectsyms, &raw.nindirectsyms);
2226 bfd_h_put_32 (abfd, cmd->extreloff, &raw.extreloff);
2227 bfd_h_put_32 (abfd, cmd->nextrel, &raw.nextrel);
2228 bfd_h_put_32 (abfd, cmd->locreloff, &raw.locreloff);
2229 bfd_h_put_32 (abfd, cmd->nlocrel, &raw.nlocrel);
2230
2231 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
2232 return FALSE;
2233 }
2234
2235 return TRUE;
2236 }
2237
2238 static unsigned
2239 bfd_mach_o_primary_symbol_sort_key (bfd_mach_o_asymbol *s)
2240 {
2241 unsigned mtyp = s->n_type & BFD_MACH_O_N_TYPE;
2242
2243 /* Just leave debug symbols where they are (pretend they are local, and
2244 then they will just be sorted on position). */
2245 if (s->n_type & BFD_MACH_O_N_STAB)
2246 return 0;
2247
2248 /* Local (we should never see an undefined local AFAICT). */
2249 if (! (s->n_type & (BFD_MACH_O_N_EXT | BFD_MACH_O_N_PEXT)))
2250 return 0;
2251
2252 /* Common symbols look like undefined externs. */
2253 if (mtyp == BFD_MACH_O_N_UNDF)
2254 return 2;
2255
2256 /* A defined non-local, non-debug symbol. */
2257 return 1;
2258 }
2259
2260 static int
2261 bfd_mach_o_cf_symbols (const void *a, const void *b)
2262 {
2263 bfd_mach_o_asymbol *sa = *(bfd_mach_o_asymbol **) a;
2264 bfd_mach_o_asymbol *sb = *(bfd_mach_o_asymbol **) b;
2265 unsigned int soa, sob;
2266
2267 soa = bfd_mach_o_primary_symbol_sort_key (sa);
2268 sob = bfd_mach_o_primary_symbol_sort_key (sb);
2269 if (soa < sob)
2270 return -1;
2271
2272 if (soa > sob)
2273 return 1;
2274
2275 /* If it's local or stab, just preserve the input order. */
2276 if (soa == 0)
2277 {
2278 if (sa->symbol.udata.i < sb->symbol.udata.i)
2279 return -1;
2280 if (sa->symbol.udata.i > sb->symbol.udata.i)
2281 return 1;
2282
2283 /* This is probably an error. */
2284 return 0;
2285 }
2286
2287 /* The second sort key is name. */
2288 return strcmp (sa->symbol.name, sb->symbol.name);
2289 }
2290
2291 /* Process the symbols.
2292
2293 This should be OK for single-module files - but it is not likely to work
2294 for multi-module shared libraries.
2295
2296 (a) If the application has not filled in the relevant mach-o fields, make
2297 an estimate.
2298
2299 (b) Order them, like this:
2300 ( i) local.
2301 (unsorted)
2302 ( ii) external defined
2303 (by name)
2304 (iii) external undefined/common
2305 (by name)
2306 ( iv) common
2307 (by name)
2308 */
2309
2310 static bfd_boolean
2311 bfd_mach_o_mangle_symbols (bfd *abfd)
2312 {
2313 unsigned long i;
2314 asymbol **symbols = bfd_get_outsymbols (abfd);
2315
2316 if (symbols == NULL || bfd_get_symcount (abfd) == 0)
2317 return TRUE;
2318
2319 for (i = 0; i < bfd_get_symcount (abfd); i++)
2320 {
2321 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2322
2323 /* We use this value, which is out-of-range as a symbol index, to signal
2324 that the mach-o-specific data are not filled in and need to be created
2325 from the bfd values. It is much preferable for the application to do
2326 this, since more meaningful diagnostics can be made that way. */
2327
2328 if (s->symbol.udata.i == SYM_MACHO_FIELDS_UNSET)
2329 {
2330 /* No symbol information has been set - therefore determine
2331 it from the bfd symbol flags/info. */
2332 if (s->symbol.section == bfd_abs_section_ptr)
2333 s->n_type = BFD_MACH_O_N_ABS;
2334 else if (s->symbol.section == bfd_und_section_ptr)
2335 {
2336 s->n_type = BFD_MACH_O_N_UNDF;
2337 if (s->symbol.flags & BSF_WEAK)
2338 s->n_desc |= BFD_MACH_O_N_WEAK_REF;
2339 /* mach-o automatically makes undefined symbols extern. */
2340 s->n_type |= BFD_MACH_O_N_EXT;
2341 s->symbol.flags |= BSF_GLOBAL;
2342 }
2343 else if (s->symbol.section == bfd_com_section_ptr)
2344 {
2345 s->n_type = BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT;
2346 s->symbol.flags |= BSF_GLOBAL;
2347 }
2348 else
2349 s->n_type = BFD_MACH_O_N_SECT;
2350
2351 if (s->symbol.flags & BSF_GLOBAL)
2352 s->n_type |= BFD_MACH_O_N_EXT;
2353 }
2354
2355 /* Put the section index in, where required. */
2356 if ((s->symbol.section != bfd_abs_section_ptr
2357 && s->symbol.section != bfd_und_section_ptr
2358 && s->symbol.section != bfd_com_section_ptr)
2359 || ((s->n_type & BFD_MACH_O_N_STAB) != 0
2360 && s->symbol.name == NULL))
2361 s->n_sect = s->symbol.section->output_section->target_index;
2362
2363 /* Number to preserve order for local and debug syms. */
2364 s->symbol.udata.i = i;
2365 }
2366
2367 /* Sort the symbols. */
2368 qsort ((void *) symbols, (size_t) bfd_get_symcount (abfd),
2369 sizeof (asymbol *), bfd_mach_o_cf_symbols);
2370
2371 for (i = 0; i < bfd_get_symcount (abfd); ++i)
2372 {
2373 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2374 s->symbol.udata.i = i; /* renumber. */
2375 }
2376
2377 return TRUE;
2378 }
2379
2380 /* We build a flat table of sections, which can be re-ordered if necessary.
2381 Fill in the section number and other mach-o-specific data. */
2382
2383 static bfd_boolean
2384 bfd_mach_o_mangle_sections (bfd *abfd, bfd_mach_o_data_struct *mdata)
2385 {
2386 asection *sec;
2387 unsigned target_index;
2388 unsigned nsect;
2389
2390 nsect = bfd_count_sections (abfd);
2391
2392 /* Don't do it if it's already set - assume the application knows what it's
2393 doing. */
2394 if (mdata->nsects == nsect
2395 && (mdata->nsects == 0 || mdata->sections != NULL))
2396 return TRUE;
2397
2398 /* We need to check that this can be done... */
2399 if (nsect > 255)
2400 {
2401 (*_bfd_error_handler) (_("mach-o: there are too many sections (%u)"
2402 " maximum is 255,\n"), nsect);
2403 return FALSE;
2404 }
2405
2406 mdata->nsects = nsect;
2407 mdata->sections = bfd_alloc2 (abfd,
2408 mdata->nsects, sizeof (bfd_mach_o_section *));
2409 if (mdata->sections == NULL)
2410 return FALSE;
2411
2412 /* Create Mach-O sections.
2413 Section type, attribute and align should have been set when the
2414 section was created - either read in or specified. */
2415 target_index = 0;
2416 for (sec = abfd->sections; sec; sec = sec->next)
2417 {
2418 unsigned bfd_align = bfd_get_section_alignment (abfd, sec);
2419 bfd_mach_o_section *msect = bfd_mach_o_get_mach_o_section (sec);
2420
2421 mdata->sections[target_index] = msect;
2422
2423 msect->addr = bfd_get_section_vma (abfd, sec);
2424 msect->size = bfd_get_section_size (sec);
2425
2426 /* Use the largest alignment set, in case it was bumped after the
2427 section was created. */
2428 msect->align = msect->align > bfd_align ? msect->align : bfd_align;
2429
2430 msect->offset = 0;
2431 sec->target_index = ++target_index;
2432 }
2433
2434 return TRUE;
2435 }
2436
2437 bfd_boolean
2438 bfd_mach_o_write_contents (bfd *abfd)
2439 {
2440 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2441 bfd_mach_o_load_command *cmd;
2442 bfd_mach_o_symtab_command *symtab = NULL;
2443 bfd_mach_o_dysymtab_command *dysymtab = NULL;
2444 bfd_mach_o_segment_command *linkedit = NULL;
2445
2446 /* Make the commands, if not already present. */
2447 if (!abfd->output_has_begun && !bfd_mach_o_build_commands (abfd))
2448 return FALSE;
2449 abfd->output_has_begun = TRUE;
2450
2451 /* Write the header. */
2452 if (!bfd_mach_o_write_header (abfd, &mdata->header))
2453 return FALSE;
2454
2455 /* First pass: allocate the linkedit segment. */
2456 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
2457 switch (cmd->type)
2458 {
2459 case BFD_MACH_O_LC_SEGMENT_64:
2460 case BFD_MACH_O_LC_SEGMENT:
2461 if (strcmp (cmd->command.segment.segname, "__LINKEDIT") == 0)
2462 linkedit = &cmd->command.segment;
2463 break;
2464 case BFD_MACH_O_LC_SYMTAB:
2465 symtab = &cmd->command.symtab;
2466 break;
2467 case BFD_MACH_O_LC_DYSYMTAB:
2468 dysymtab = &cmd->command.dysymtab;
2469 break;
2470 case BFD_MACH_O_LC_DYLD_INFO:
2471 {
2472 bfd_mach_o_dyld_info_command *di = &cmd->command.dyld_info;
2473
2474 if (di->rebase_size != 0)
2475 {
2476 di->rebase_off = mdata->filelen;
2477 mdata->filelen += di->rebase_size;
2478 }
2479 if (di->bind_size != 0)
2480 {
2481 di->bind_off = mdata->filelen;
2482 mdata->filelen += di->bind_size;
2483 }
2484 if (di->weak_bind_size != 0)
2485 {
2486 di->weak_bind_off = mdata->filelen;
2487 mdata->filelen += di->weak_bind_size;
2488 }
2489 if (di->lazy_bind_size != 0)
2490 {
2491 di->lazy_bind_off = mdata->filelen;
2492 mdata->filelen += di->lazy_bind_size;
2493 }
2494 if (di->export_size != 0)
2495 {
2496 di->export_off = mdata->filelen;
2497 mdata->filelen += di->export_size;
2498 }
2499 }
2500 break;
2501 case BFD_MACH_O_LC_LOAD_DYLIB:
2502 case BFD_MACH_O_LC_LOAD_DYLINKER:
2503 case BFD_MACH_O_LC_MAIN:
2504 /* Nothing to do. */
2505 break;
2506 default:
2507 (*_bfd_error_handler)
2508 (_("unable to allocate data for load command 0x%lx"),
2509 (unsigned long) cmd->type);
2510 break;
2511 }
2512
2513 /* Specially handle symtab and dysymtab. */
2514
2515 /* Pre-allocate the symbol table (but not the string table). The reason
2516 is that the dysymtab is after the symbol table but before the string
2517 table (required by the native strip tool). */
2518 if (symtab != NULL)
2519 {
2520 unsigned int symlen;
2521 unsigned int wide = bfd_mach_o_wide_p (abfd);
2522
2523 symlen = wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE;
2524
2525 /* Align for symbols. */
2526 mdata->filelen = FILE_ALIGN (mdata->filelen, wide ? 3 : 2);
2527 symtab->symoff = mdata->filelen;
2528
2529 symtab->nsyms = bfd_get_symcount (abfd);
2530 mdata->filelen += symtab->nsyms * symlen;
2531 }
2532
2533 /* Build the dysymtab. */
2534 if (dysymtab != NULL)
2535 if (!bfd_mach_o_build_dysymtab (abfd, dysymtab))
2536 return FALSE;
2537
2538 /* Write symtab and strtab. */
2539 if (symtab != NULL)
2540 if (!bfd_mach_o_write_symtab_content (abfd, symtab))
2541 return FALSE;
2542
2543 /* Adjust linkedit size. */
2544 if (linkedit != NULL)
2545 {
2546 /* bfd_vma pagemask = bfd_mach_o_get_backend_data (abfd)->page_size - 1; */
2547
2548 linkedit->vmsize = mdata->filelen - linkedit->fileoff;
2549 /* linkedit->vmsize = (linkedit->vmsize + pagemask) & ~pagemask; */
2550 linkedit->filesize = mdata->filelen - linkedit->fileoff;
2551
2552 linkedit->initprot = BFD_MACH_O_PROT_READ;
2553 linkedit->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
2554 | BFD_MACH_O_PROT_EXECUTE;
2555 }
2556
2557 /* Second pass: write commands. */
2558 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
2559 {
2560 struct mach_o_load_command_external raw;
2561 unsigned long typeflag;
2562
2563 typeflag = cmd->type | (cmd->type_required ? BFD_MACH_O_LC_REQ_DYLD : 0);
2564
2565 bfd_h_put_32 (abfd, typeflag, raw.cmd);
2566 bfd_h_put_32 (abfd, cmd->len, raw.cmdsize);
2567
2568 if (bfd_seek (abfd, cmd->offset, SEEK_SET) != 0
2569 || bfd_bwrite (&raw, BFD_MACH_O_LC_SIZE, abfd) != 8)
2570 return FALSE;
2571
2572 switch (cmd->type)
2573 {
2574 case BFD_MACH_O_LC_SEGMENT:
2575 if (!bfd_mach_o_write_segment_32 (abfd, cmd))
2576 return FALSE;
2577 break;
2578 case BFD_MACH_O_LC_SEGMENT_64:
2579 if (!bfd_mach_o_write_segment_64 (abfd, cmd))
2580 return FALSE;
2581 break;
2582 case BFD_MACH_O_LC_SYMTAB:
2583 if (!bfd_mach_o_write_symtab (abfd, cmd))
2584 return FALSE;
2585 break;
2586 case BFD_MACH_O_LC_DYSYMTAB:
2587 if (!bfd_mach_o_write_dysymtab (abfd, cmd))
2588 return FALSE;
2589 break;
2590 case BFD_MACH_O_LC_THREAD:
2591 case BFD_MACH_O_LC_UNIXTHREAD:
2592 if (!bfd_mach_o_write_thread (abfd, cmd))
2593 return FALSE;
2594 break;
2595 case BFD_MACH_O_LC_LOAD_DYLIB:
2596 if (!bfd_mach_o_write_dylib (abfd, cmd))
2597 return FALSE;
2598 break;
2599 case BFD_MACH_O_LC_LOAD_DYLINKER:
2600 if (!bfd_mach_o_write_dylinker (abfd, cmd))
2601 return FALSE;
2602 break;
2603 case BFD_MACH_O_LC_MAIN:
2604 if (!bfd_mach_o_write_main (abfd, cmd))
2605 return FALSE;
2606 break;
2607 case BFD_MACH_O_LC_DYLD_INFO:
2608 if (!bfd_mach_o_write_dyld_info (abfd, cmd))
2609 return FALSE;
2610 break;
2611 default:
2612 (*_bfd_error_handler)
2613 (_("unable to write unknown load command 0x%lx"),
2614 (unsigned long) cmd->type);
2615 return FALSE;
2616 }
2617 }
2618
2619 return TRUE;
2620 }
2621
2622 static void
2623 bfd_mach_o_append_section_to_segment (bfd_mach_o_segment_command *seg,
2624 bfd_mach_o_section *s)
2625 {
2626 if (seg->sect_head == NULL)
2627 seg->sect_head = s;
2628 else
2629 seg->sect_tail->next = s;
2630 seg->sect_tail = s;
2631 }
2632
2633 /* Create section Mach-O flags from BFD flags. */
2634
2635 static void
2636 bfd_mach_o_set_section_flags_from_bfd (bfd *abfd ATTRIBUTE_UNUSED,
2637 asection *sec)
2638 {
2639 flagword bfd_flags;
2640 bfd_mach_o_section *s = bfd_mach_o_get_mach_o_section (sec);
2641
2642 /* Create default flags. */
2643 bfd_flags = bfd_get_section_flags (abfd, sec);
2644 if ((bfd_flags & SEC_CODE) == SEC_CODE)
2645 s->flags = BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS
2646 | BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS
2647 | BFD_MACH_O_S_REGULAR;
2648 else if ((bfd_flags & (SEC_ALLOC | SEC_LOAD)) == SEC_ALLOC)
2649 s->flags = BFD_MACH_O_S_ZEROFILL;
2650 else if (bfd_flags & SEC_DEBUGGING)
2651 s->flags = BFD_MACH_O_S_REGULAR | BFD_MACH_O_S_ATTR_DEBUG;
2652 else
2653 s->flags = BFD_MACH_O_S_REGULAR;
2654 }
2655
2656 static bfd_boolean
2657 bfd_mach_o_build_obj_seg_command (bfd *abfd, bfd_mach_o_segment_command *seg)
2658 {
2659 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2660 unsigned int i, j;
2661
2662 seg->vmaddr = 0;
2663 seg->fileoff = mdata->filelen;
2664 seg->initprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
2665 | BFD_MACH_O_PROT_EXECUTE;
2666 seg->maxprot = seg->initprot;
2667
2668 /* Append sections to the segment.
2669
2670 This is a little tedious, we have to honor the need to account zerofill
2671 sections after all the rest. This forces us to do the calculation of
2672 total vmsize in three passes so that any alignment increments are
2673 properly accounted. */
2674 for (i = 0; i < mdata->nsects; ++i)
2675 {
2676 bfd_mach_o_section *s = mdata->sections[i];
2677 asection *sec = s->bfdsection;
2678
2679 /* Although we account for zerofill section sizes in vm order, they are
2680 placed in the file in source sequence. */
2681 bfd_mach_o_append_section_to_segment (seg, s);
2682 s->offset = 0;
2683
2684 /* Zerofill sections have zero file size & offset, the only content
2685 written to the file is the symbols. */
2686 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) == BFD_MACH_O_S_ZEROFILL
2687 || ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2688 == BFD_MACH_O_S_GB_ZEROFILL))
2689 continue;
2690
2691 /* The Darwin system tools (in MH_OBJECT files, at least) always account
2692 sections, even those with zero size. */
2693 if (s->size > 0)
2694 {
2695 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2696 seg->vmsize += s->size;
2697
2698 /* MH_OBJECT files have unaligned content. */
2699 if (1)
2700 {
2701 seg->filesize = FILE_ALIGN (seg->filesize, s->align);
2702 mdata->filelen = FILE_ALIGN (mdata->filelen, s->align);
2703 }
2704 seg->filesize += s->size;
2705
2706 /* The system tools write even zero-sized sections with an offset
2707 field set to the current file position. */
2708 s->offset = mdata->filelen;
2709 }
2710
2711 sec->filepos = s->offset;
2712 mdata->filelen += s->size;
2713 }
2714
2715 /* Now pass through again, for zerofill, only now we just update the
2716 vmsize, and then for zerofill_GB. */
2717 for (j = 0; j < 2; j++)
2718 {
2719 unsigned int stype;
2720
2721 if (j == 0)
2722 stype = BFD_MACH_O_S_ZEROFILL;
2723 else
2724 stype = BFD_MACH_O_S_GB_ZEROFILL;
2725
2726 for (i = 0; i < mdata->nsects; ++i)
2727 {
2728 bfd_mach_o_section *s = mdata->sections[i];
2729
2730 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != stype)
2731 continue;
2732
2733 if (s->size > 0)
2734 {
2735 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2736 seg->vmsize += s->size;
2737 }
2738 }
2739 }
2740
2741 /* Allocate space for the relocations. */
2742 mdata->filelen = FILE_ALIGN (mdata->filelen, 2);
2743
2744 for (i = 0; i < mdata->nsects; ++i)
2745 {
2746 bfd_mach_o_section *ms = mdata->sections[i];
2747 asection *sec = ms->bfdsection;
2748
2749 ms->nreloc = sec->reloc_count;
2750 if (ms->nreloc == 0)
2751 {
2752 /* Clear nreloc and reloff if there is no relocs. */
2753 ms->reloff = 0;
2754 continue;
2755 }
2756 sec->rel_filepos = mdata->filelen;
2757 ms->reloff = sec->rel_filepos;
2758 mdata->filelen += sec->reloc_count * BFD_MACH_O_RELENT_SIZE;
2759 }
2760
2761 return TRUE;
2762 }
2763
2764 static bfd_boolean
2765 bfd_mach_o_build_exec_seg_command (bfd *abfd, bfd_mach_o_segment_command *seg)
2766 {
2767 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2768 unsigned int i;
2769 bfd_vma pagemask = bfd_mach_o_get_backend_data (abfd)->page_size - 1;
2770 bfd_vma vma;
2771 bfd_mach_o_section *s;
2772
2773 seg->vmsize = 0;
2774
2775 seg->fileoff = mdata->filelen;
2776 seg->maxprot = 0;
2777 seg->initprot = 0;
2778 seg->flags = 0;
2779
2780 /* Append sections to the segment. We assume they are properly ordered
2781 by vma (but we check that). */
2782 vma = 0;
2783 for (i = 0; i < mdata->nsects; ++i)
2784 {
2785 s = mdata->sections[i];
2786
2787 /* Consider only sections for this segment. */
2788 if (strcmp (seg->segname, s->segname) != 0)
2789 continue;
2790
2791 bfd_mach_o_append_section_to_segment (seg, s);
2792
2793 if (s->addr < vma)
2794 {
2795 (*_bfd_error_handler)
2796 (_("section address (%lx) below start of segment (%lx)"),
2797 (unsigned long) s->addr, (unsigned long) vma);
2798 return FALSE;
2799 }
2800
2801 vma = s->addr + s->size;
2802 }
2803
2804 /* Set segment file offset: make it page aligned. */
2805 vma = seg->sect_head->addr;
2806 seg->vmaddr = vma & ~pagemask;
2807 if ((mdata->filelen & pagemask) > (vma & pagemask))
2808 mdata->filelen += pagemask + 1;
2809 seg->fileoff = mdata->filelen & ~pagemask;
2810 mdata->filelen = seg->fileoff + (vma & pagemask);
2811
2812 /* Set section file offset. */
2813 for (s = seg->sect_head; s != NULL; s = s->next)
2814 {
2815 asection *sec = s->bfdsection;
2816 flagword flags = bfd_get_section_flags (abfd, sec);
2817
2818 /* Adjust segment size. */
2819 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2820 seg->vmsize += s->size;
2821
2822 /* File offset and length. */
2823 seg->filesize = FILE_ALIGN (seg->filesize, s->align);
2824
2825 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != BFD_MACH_O_S_ZEROFILL
2826 && ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2827 != BFD_MACH_O_S_GB_ZEROFILL))
2828 {
2829 mdata->filelen = FILE_ALIGN (mdata->filelen, s->align);
2830
2831 s->offset = mdata->filelen;
2832 s->bfdsection->filepos = s->offset;
2833
2834 seg->filesize += s->size;
2835 mdata->filelen += s->size;
2836 }
2837 else
2838 {
2839 s->offset = 0;
2840 s->bfdsection->filepos = 0;
2841 }
2842
2843 /* Set protection. */
2844 if (flags & SEC_LOAD)
2845 {
2846 if (flags & SEC_CODE)
2847 seg->initprot |= BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_EXECUTE;
2848 if ((flags & (SEC_DATA | SEC_READONLY)) == SEC_DATA)
2849 seg->initprot |= BFD_MACH_O_PROT_WRITE | BFD_MACH_O_PROT_READ;
2850 }
2851
2852 /* Relocs shouldn't appear in non-object files. */
2853 if (s->bfdsection->reloc_count != 0)
2854 return FALSE;
2855 }
2856
2857 /* Set maxprot. */
2858 if (seg->initprot != 0)
2859 seg->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
2860 | BFD_MACH_O_PROT_EXECUTE;
2861 else
2862 seg->maxprot = 0;
2863
2864 /* Round segment size (and file size). */
2865 seg->vmsize = (seg->vmsize + pagemask) & ~pagemask;
2866 seg->filesize = (seg->filesize + pagemask) & ~pagemask;
2867 mdata->filelen = (mdata->filelen + pagemask) & ~pagemask;
2868
2869 return TRUE;
2870 }
2871
2872 /* Layout the commands: set commands size and offset, set ncmds and sizeofcmds
2873 fields in header. */
2874
2875 static bfd_boolean
2876 bfd_mach_o_layout_commands (bfd_mach_o_data_struct *mdata)
2877 {
2878 unsigned wide = mach_o_wide_p (&mdata->header);
2879 unsigned int hdrlen;
2880 ufile_ptr offset;
2881 bfd_mach_o_load_command *cmd;
2882 unsigned int align;
2883 bfd_boolean ret = TRUE;
2884
2885 hdrlen = wide ? BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
2886 align = wide ? 8 - 1 : 4 - 1;
2887 offset = hdrlen;
2888 mdata->header.ncmds = 0;
2889
2890 for (cmd = mdata->first_command; cmd; cmd = cmd->next)
2891 {
2892 mdata->header.ncmds++;
2893 cmd->offset = offset;
2894
2895 switch (cmd->type)
2896 {
2897 case BFD_MACH_O_LC_SEGMENT_64:
2898 cmd->len = BFD_MACH_O_LC_SEGMENT_64_SIZE
2899 + BFD_MACH_O_SECTION_64_SIZE * cmd->command.segment.nsects;
2900 break;
2901 case BFD_MACH_O_LC_SEGMENT:
2902 cmd->len = BFD_MACH_O_LC_SEGMENT_SIZE
2903 + BFD_MACH_O_SECTION_SIZE * cmd->command.segment.nsects;
2904 break;
2905 case BFD_MACH_O_LC_SYMTAB:
2906 cmd->len = sizeof (struct mach_o_symtab_command_external)
2907 + BFD_MACH_O_LC_SIZE;
2908 break;
2909 case BFD_MACH_O_LC_DYSYMTAB:
2910 cmd->len = sizeof (struct mach_o_dysymtab_command_external)
2911 + BFD_MACH_O_LC_SIZE;
2912 break;
2913 case BFD_MACH_O_LC_LOAD_DYLIB:
2914 cmd->len = sizeof (struct mach_o_dylib_command_external)
2915 + BFD_MACH_O_LC_SIZE;
2916 cmd->command.dylib.name_offset = cmd->len;
2917 cmd->len += strlen (cmd->command.dylib.name_str);
2918 cmd->len = (cmd->len + align) & ~align;
2919 break;
2920 case BFD_MACH_O_LC_LOAD_DYLINKER:
2921 cmd->len = sizeof (struct mach_o_str_command_external)
2922 + BFD_MACH_O_LC_SIZE;
2923 cmd->command.dylinker.name_offset = cmd->len;
2924 cmd->len += strlen (cmd->command.dylinker.name_str);
2925 cmd->len = (cmd->len + align) & ~align;
2926 break;
2927 case BFD_MACH_O_LC_MAIN:
2928 cmd->len = sizeof (struct mach_o_entry_point_command_external)
2929 + BFD_MACH_O_LC_SIZE;
2930 break;
2931 case BFD_MACH_O_LC_DYLD_INFO:
2932 cmd->len = sizeof (struct mach_o_dyld_info_command_external)
2933 + BFD_MACH_O_LC_SIZE;
2934 break;
2935 default:
2936 (*_bfd_error_handler)
2937 (_("unable to layout unknown load command 0x%lx"),
2938 (unsigned long) cmd->type);
2939 ret = FALSE;
2940 break;
2941 }
2942
2943 BFD_ASSERT (cmd->len % (align + 1) == 0);
2944 offset += cmd->len;
2945 }
2946 mdata->header.sizeofcmds = offset - hdrlen;
2947 mdata->filelen = offset;
2948
2949 return ret;
2950 }
2951
2952 /* Subroutine of bfd_mach_o_build_commands: set type, name and nsects of a
2953 segment. */
2954
2955 static void
2956 bfd_mach_o_init_segment (bfd_mach_o_data_struct *mdata,
2957 bfd_mach_o_load_command *cmd,
2958 const char *segname, unsigned int nbr_sect)
2959 {
2960 bfd_mach_o_segment_command *seg = &cmd->command.segment;
2961 unsigned wide = mach_o_wide_p (&mdata->header);
2962
2963 /* Init segment command. */
2964 cmd->type = wide ? BFD_MACH_O_LC_SEGMENT_64 : BFD_MACH_O_LC_SEGMENT;
2965 cmd->type_required = FALSE;
2966
2967 strcpy (seg->segname, segname);
2968 seg->nsects = nbr_sect;
2969
2970 seg->vmaddr = 0;
2971 seg->vmsize = 0;
2972
2973 seg->fileoff = 0;
2974 seg->filesize = 0;
2975 seg->maxprot = 0;
2976 seg->initprot = 0;
2977 seg->flags = 0;
2978 seg->sect_head = NULL;
2979 seg->sect_tail = NULL;
2980 }
2981
2982 /* Build Mach-O load commands (currently assuming an MH_OBJECT file).
2983 TODO: Other file formats, rebuilding symtab/dysymtab commands for strip
2984 and copy functionality. */
2985
2986 bfd_boolean
2987 bfd_mach_o_build_commands (bfd *abfd)
2988 {
2989 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2990 unsigned wide = mach_o_wide_p (&mdata->header);
2991 unsigned int nbr_segcmd = 0;
2992 bfd_mach_o_load_command *commands;
2993 unsigned int nbr_commands;
2994 int symtab_idx = -1;
2995 int dysymtab_idx = -1;
2996 int main_idx = -1;
2997 unsigned int i;
2998
2999 /* Return now if already built. */
3000 if (mdata->header.ncmds != 0)
3001 return TRUE;
3002
3003 /* Fill in the file type, if not already set. */
3004 if (mdata->header.filetype == 0)
3005 {
3006 if (abfd->flags & EXEC_P)
3007 mdata->header.filetype = BFD_MACH_O_MH_EXECUTE;
3008 else if (abfd->flags & DYNAMIC)
3009 mdata->header.filetype = BFD_MACH_O_MH_DYLIB;
3010 else
3011 mdata->header.filetype = BFD_MACH_O_MH_OBJECT;
3012 }
3013
3014 /* If hasn't already been done, flatten sections list, and sort
3015 if/when required. Must be done before the symbol table is adjusted,
3016 since that depends on properly numbered sections. */
3017 if (mdata->nsects == 0 || mdata->sections == NULL)
3018 if (! bfd_mach_o_mangle_sections (abfd, mdata))
3019 return FALSE;
3020
3021 /* Order the symbol table, fill-in/check mach-o specific fields and
3022 partition out any indirect symbols. */
3023 if (!bfd_mach_o_mangle_symbols (abfd))
3024 return FALSE;
3025
3026 /* Segment commands. */
3027 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT)
3028 {
3029 /* Only one segment for all the sections. But the segment is
3030 optional if there is no sections. */
3031 nbr_segcmd = (mdata->nsects > 0) ? 1 : 0;
3032 }
3033 else
3034 {
3035 bfd_mach_o_section *prev_sect = NULL;
3036
3037 /* One pagezero segment and one linkedit segment. */
3038 nbr_segcmd = 2;
3039
3040 /* Create one segment for associated segment name in sections.
3041 Assume that sections with the same segment name are consecutive. */
3042 for (i = 0; i < mdata->nsects; i++)
3043 {
3044 bfd_mach_o_section *this_sect = mdata->sections[i];
3045
3046 if (prev_sect == NULL
3047 || strcmp (prev_sect->segname, this_sect->segname) != 0)
3048 {
3049 nbr_segcmd++;
3050 prev_sect = this_sect;
3051 }
3052 }
3053 }
3054
3055 nbr_commands = nbr_segcmd;
3056
3057 /* One command for the symbol table (only if there are symbols. */
3058 if (bfd_get_symcount (abfd) > 0)
3059 symtab_idx = nbr_commands++;
3060
3061 /* FIXME:
3062 This is a rather crude test for whether we should build a dysymtab. */
3063 if (bfd_mach_o_should_emit_dysymtab ()
3064 && bfd_get_symcount (abfd))
3065 {
3066 /* If there should be a case where a dysymtab could be emitted without
3067 a symtab (seems improbable), this would need amending. */
3068 dysymtab_idx = nbr_commands++;
3069 }
3070
3071 /* Add an entry point command. */
3072 if (mdata->header.filetype == BFD_MACH_O_MH_EXECUTE
3073 && bfd_get_start_address (abfd) != 0)
3074 main_idx = nbr_commands++;
3075
3076 /* Well, we must have a header, at least. */
3077 mdata->filelen = wide ? BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
3078
3079 /* A bit unusual, but no content is valid;
3080 as -n empty.s -o empty.o */
3081 if (nbr_commands == 0)
3082 {
3083 /* Layout commands (well none...) and set headers command fields. */
3084 return bfd_mach_o_layout_commands (mdata);
3085 }
3086
3087 /* Create commands for segments (and symtabs), prepend them. */
3088 commands = bfd_zalloc (abfd, nbr_commands * sizeof (bfd_mach_o_load_command));
3089 if (commands == NULL)
3090 return FALSE;
3091 for (i = 0; i < nbr_commands - 1; i++)
3092 commands[i].next = &commands[i + 1];
3093 commands[nbr_commands - 1].next = mdata->first_command;
3094 if (mdata->first_command == NULL)
3095 mdata->last_command = &commands[nbr_commands - 1];
3096 mdata->first_command = &commands[0];
3097
3098 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT && nbr_segcmd != 0)
3099 {
3100 /* For object file, there is only one segment. */
3101 bfd_mach_o_init_segment (mdata, &commands[0], "", mdata->nsects);
3102 }
3103 else if (nbr_segcmd != 0)
3104 {
3105 bfd_mach_o_load_command *cmd;
3106
3107 BFD_ASSERT (nbr_segcmd >= 2);
3108
3109 /* The pagezero. */
3110 cmd = &commands[0];
3111 bfd_mach_o_init_segment (mdata, cmd, "__PAGEZERO", 0);
3112
3113 /* Segments from sections. */
3114 cmd++;
3115 for (i = 0; i < mdata->nsects;)
3116 {
3117 const char *segname = mdata->sections[i]->segname;
3118 unsigned int nbr_sect = 1;
3119
3120 /* Count number of sections for this segment. */
3121 for (i++; i < mdata->nsects; i++)
3122 if (strcmp (mdata->sections[i]->segname, segname) == 0)
3123 nbr_sect++;
3124 else
3125 break;
3126
3127 bfd_mach_o_init_segment (mdata, cmd, segname, nbr_sect);
3128 cmd++;
3129 }
3130
3131 /* The linkedit. */
3132 bfd_mach_o_init_segment (mdata, cmd, "__LINKEDIT", 0);
3133 }
3134
3135 if (symtab_idx >= 0)
3136 {
3137 /* Init symtab command. */
3138 bfd_mach_o_load_command *cmd = &commands[symtab_idx];
3139
3140 cmd->type = BFD_MACH_O_LC_SYMTAB;
3141 cmd->type_required = FALSE;
3142 }
3143
3144 /* If required, setup symtab command, see comment above about the quality
3145 of this test. */
3146 if (dysymtab_idx >= 0)
3147 {
3148 bfd_mach_o_load_command *cmd = &commands[dysymtab_idx];
3149
3150 cmd->type = BFD_MACH_O_LC_DYSYMTAB;
3151 cmd->type_required = FALSE;
3152 }
3153
3154 /* Create the main command. */
3155 if (main_idx >= 0)
3156 {
3157 bfd_mach_o_load_command *cmd = &commands[main_idx];
3158
3159 cmd->type = BFD_MACH_O_LC_MAIN;
3160 cmd->type_required = TRUE;
3161
3162 cmd->command.main.entryoff = 0;
3163 cmd->command.main.stacksize = 0;
3164 }
3165
3166 /* Layout commands. */
3167 if (! bfd_mach_o_layout_commands (mdata))
3168 return FALSE;
3169
3170 /* So, now we have sized the commands and the filelen set to that.
3171 Now we can build the segment command and set the section file offsets. */
3172 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT)
3173 {
3174 for (i = 0; i < nbr_segcmd; i++)
3175 if (!bfd_mach_o_build_obj_seg_command
3176 (abfd, &commands[i].command.segment))
3177 return FALSE;
3178 }
3179 else
3180 {
3181 bfd_vma maxvma = 0;
3182
3183 /* Skip pagezero and linkedit segments. */
3184 for (i = 1; i < nbr_segcmd - 1; i++)
3185 {
3186 bfd_mach_o_segment_command *seg = &commands[i].command.segment;
3187
3188 if (!bfd_mach_o_build_exec_seg_command (abfd, seg))
3189 return FALSE;
3190
3191 if (seg->vmaddr + seg->vmsize > maxvma)
3192 maxvma = seg->vmaddr + seg->vmsize;
3193 }
3194
3195 /* Set the size of __PAGEZERO. */
3196 commands[0].command.segment.vmsize =
3197 commands[1].command.segment.vmaddr;
3198
3199 /* Set the vma and fileoff of __LINKEDIT. */
3200 commands[nbr_segcmd - 1].command.segment.vmaddr = maxvma;
3201 commands[nbr_segcmd - 1].command.segment.fileoff = mdata->filelen;
3202
3203 /* Set entry point (once segments have been laid out). */
3204 if (main_idx >= 0)
3205 commands[main_idx].command.main.entryoff =
3206 bfd_get_start_address (abfd) - commands[1].command.segment.vmaddr;
3207 }
3208
3209 return TRUE;
3210 }
3211
3212 /* Set the contents of a section. */
3213
3214 bfd_boolean
3215 bfd_mach_o_set_section_contents (bfd *abfd,
3216 asection *section,
3217 const void * location,
3218 file_ptr offset,
3219 bfd_size_type count)
3220 {
3221 file_ptr pos;
3222
3223 /* Trying to write the first section contents will trigger the creation of
3224 the load commands if they are not already present. */
3225 if (!abfd->output_has_begun && !bfd_mach_o_build_commands (abfd))
3226 return FALSE;
3227
3228 if (count == 0)
3229 return TRUE;
3230
3231 pos = section->filepos + offset;
3232 if (bfd_seek (abfd, pos, SEEK_SET) != 0
3233 || bfd_bwrite (location, count, abfd) != count)
3234 return FALSE;
3235
3236 return TRUE;
3237 }
3238
3239 int
3240 bfd_mach_o_sizeof_headers (bfd *a ATTRIBUTE_UNUSED,
3241 struct bfd_link_info *info ATTRIBUTE_UNUSED)
3242 {
3243 return 0;
3244 }
3245
3246 /* Make an empty symbol. This is required only because
3247 bfd_make_section_anyway wants to create a symbol for the section. */
3248
3249 asymbol *
3250 bfd_mach_o_make_empty_symbol (bfd *abfd)
3251 {
3252 asymbol *new_symbol;
3253
3254 new_symbol = bfd_zalloc (abfd, sizeof (bfd_mach_o_asymbol));
3255 if (new_symbol == NULL)
3256 return new_symbol;
3257 new_symbol->the_bfd = abfd;
3258 new_symbol->udata.i = SYM_MACHO_FIELDS_UNSET;
3259 return new_symbol;
3260 }
3261
3262 static bfd_boolean
3263 bfd_mach_o_read_header (bfd *abfd, file_ptr hdr_off, bfd_mach_o_header *header)
3264 {
3265 struct mach_o_header_external raw;
3266 unsigned int size;
3267 bfd_vma (*get32) (const void *) = NULL;
3268
3269 /* Just read the magic number. */
3270 if (bfd_seek (abfd, hdr_off, SEEK_SET) != 0
3271 || bfd_bread (raw.magic, sizeof (raw.magic), abfd) != 4)
3272 return FALSE;
3273
3274 if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC)
3275 {
3276 header->byteorder = BFD_ENDIAN_BIG;
3277 header->magic = BFD_MACH_O_MH_MAGIC;
3278 header->version = 1;
3279 get32 = bfd_getb32;
3280 }
3281 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC)
3282 {
3283 header->byteorder = BFD_ENDIAN_LITTLE;
3284 header->magic = BFD_MACH_O_MH_MAGIC;
3285 header->version = 1;
3286 get32 = bfd_getl32;
3287 }
3288 else if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64)
3289 {
3290 header->byteorder = BFD_ENDIAN_BIG;
3291 header->magic = BFD_MACH_O_MH_MAGIC_64;
3292 header->version = 2;
3293 get32 = bfd_getb32;
3294 }
3295 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64)
3296 {
3297 header->byteorder = BFD_ENDIAN_LITTLE;
3298 header->magic = BFD_MACH_O_MH_MAGIC_64;
3299 header->version = 2;
3300 get32 = bfd_getl32;
3301 }
3302 else
3303 {
3304 header->byteorder = BFD_ENDIAN_UNKNOWN;
3305 return FALSE;
3306 }
3307
3308 /* Once the size of the header is known, read the full header. */
3309 size = mach_o_wide_p (header) ?
3310 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
3311
3312 if (bfd_seek (abfd, hdr_off, SEEK_SET) != 0
3313 || bfd_bread (&raw, size, abfd) != size)
3314 return FALSE;
3315
3316 header->cputype = (*get32) (raw.cputype);
3317 header->cpusubtype = (*get32) (raw.cpusubtype);
3318 header->filetype = (*get32) (raw.filetype);
3319 header->ncmds = (*get32) (raw.ncmds);
3320 header->sizeofcmds = (*get32) (raw.sizeofcmds);
3321 header->flags = (*get32) (raw.flags);
3322
3323 if (mach_o_wide_p (header))
3324 header->reserved = (*get32) (raw.reserved);
3325 else
3326 header->reserved = 0;
3327
3328 return TRUE;
3329 }
3330
3331 bfd_boolean
3332 bfd_mach_o_new_section_hook (bfd *abfd, asection *sec)
3333 {
3334 bfd_mach_o_section *s;
3335 unsigned bfdalign = bfd_get_section_alignment (abfd, sec);
3336
3337 s = bfd_mach_o_get_mach_o_section (sec);
3338 if (s == NULL)
3339 {
3340 flagword bfd_flags;
3341 static const mach_o_section_name_xlat * xlat;
3342
3343 s = (bfd_mach_o_section *) bfd_zalloc (abfd, sizeof (*s));
3344 if (s == NULL)
3345 return FALSE;
3346 sec->used_by_bfd = s;
3347 s->bfdsection = sec;
3348
3349 /* Create the Darwin seg/sect name pair from the bfd name.
3350 If this is a canonical name for which a specific paiting exists
3351 there will also be defined flags, type, attribute and alignment
3352 values. */
3353 xlat = bfd_mach_o_convert_section_name_to_mach_o (abfd, sec, s);
3354 if (xlat != NULL)
3355 {
3356 s->flags = xlat->macho_sectype | xlat->macho_secattr;
3357 s->align = xlat->sectalign > bfdalign ? xlat->sectalign
3358 : bfdalign;
3359 (void) bfd_set_section_alignment (abfd, sec, s->align);
3360 bfd_flags = bfd_get_section_flags (abfd, sec);
3361 if (bfd_flags == SEC_NO_FLAGS)
3362 bfd_set_section_flags (abfd, sec, xlat->bfd_flags);
3363 }
3364 else
3365 /* Create default flags. */
3366 bfd_mach_o_set_section_flags_from_bfd (abfd, sec);
3367 }
3368
3369 return _bfd_generic_new_section_hook (abfd, sec);
3370 }
3371
3372 static void
3373 bfd_mach_o_init_section_from_mach_o (bfd *abfd, asection *sec,
3374 unsigned long prot)
3375 {
3376 flagword flags;
3377 bfd_mach_o_section *section;
3378
3379 flags = bfd_get_section_flags (abfd, sec);
3380 section = bfd_mach_o_get_mach_o_section (sec);
3381
3382 /* TODO: see if we should use the xlat system for doing this by
3383 preference and fall back to this for unknown sections. */
3384
3385 if (flags == SEC_NO_FLAGS)
3386 {
3387 /* Try to guess flags. */
3388 if (section->flags & BFD_MACH_O_S_ATTR_DEBUG)
3389 flags = SEC_DEBUGGING;
3390 else
3391 {
3392 flags = SEC_ALLOC;
3393 if ((section->flags & BFD_MACH_O_SECTION_TYPE_MASK)
3394 != BFD_MACH_O_S_ZEROFILL)
3395 {
3396 flags |= SEC_LOAD;
3397 if (prot & BFD_MACH_O_PROT_EXECUTE)
3398 flags |= SEC_CODE;
3399 if (prot & BFD_MACH_O_PROT_WRITE)
3400 flags |= SEC_DATA;
3401 else if (prot & BFD_MACH_O_PROT_READ)
3402 flags |= SEC_READONLY;
3403 }
3404 }
3405 }
3406 else
3407 {
3408 if ((flags & SEC_DEBUGGING) == 0)
3409 flags |= SEC_ALLOC;
3410 }
3411
3412 if (section->offset != 0)
3413 flags |= SEC_HAS_CONTENTS;
3414 if (section->nreloc != 0)
3415 flags |= SEC_RELOC;
3416
3417 bfd_set_section_flags (abfd, sec, flags);
3418
3419 sec->vma = section->addr;
3420 sec->lma = section->addr;
3421 sec->size = section->size;
3422 sec->filepos = section->offset;
3423 sec->alignment_power = section->align;
3424 sec->segment_mark = 0;
3425 sec->reloc_count = section->nreloc;
3426 sec->rel_filepos = section->reloff;
3427 }
3428
3429 static asection *
3430 bfd_mach_o_make_bfd_section (bfd *abfd,
3431 const unsigned char *segname,
3432 const unsigned char *sectname)
3433 {
3434 const char *sname;
3435 flagword flags;
3436
3437 bfd_mach_o_convert_section_name_to_bfd
3438 (abfd, (const char *)segname, (const char *)sectname, &sname, &flags);
3439 if (sname == NULL)
3440 return NULL;
3441
3442 return bfd_make_section_anyway_with_flags (abfd, sname, flags);
3443 }
3444
3445 static asection *
3446 bfd_mach_o_read_section_32 (bfd *abfd, unsigned long prot)
3447 {
3448 struct mach_o_section_32_external raw;
3449 asection *sec;
3450 bfd_mach_o_section *section;
3451
3452 if (bfd_bread (&raw, BFD_MACH_O_SECTION_SIZE, abfd)
3453 != BFD_MACH_O_SECTION_SIZE)
3454 return NULL;
3455
3456 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname);
3457 if (sec == NULL)
3458 return NULL;
3459
3460 section = bfd_mach_o_get_mach_o_section (sec);
3461 memcpy (section->segname, raw.segname, sizeof (raw.segname));
3462 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0;
3463 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname));
3464 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0;
3465 section->addr = bfd_h_get_32 (abfd, raw.addr);
3466 section->size = bfd_h_get_32 (abfd, raw.size);
3467 section->offset = bfd_h_get_32 (abfd, raw.offset);
3468 section->align = bfd_h_get_32 (abfd, raw.align);
3469 /* PR 17512: file: 0017eb76. */
3470 if (section->align > 64)
3471 {
3472 (*_bfd_error_handler) (_("bfd_mach_o_read_section_32: overlarge alignment value: 0x%x, using 32 instead"),
3473 section->align);
3474 section->align = 32;
3475 }
3476 section->reloff = bfd_h_get_32 (abfd, raw.reloff);
3477 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc);
3478 section->flags = bfd_h_get_32 (abfd, raw.flags);
3479 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1);
3480 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2);
3481 section->reserved3 = 0;
3482
3483 bfd_mach_o_init_section_from_mach_o (abfd, sec, prot);
3484
3485 return sec;
3486 }
3487
3488 static asection *
3489 bfd_mach_o_read_section_64 (bfd *abfd, unsigned long prot)
3490 {
3491 struct mach_o_section_64_external raw;
3492 asection *sec;
3493 bfd_mach_o_section *section;
3494
3495 if (bfd_bread (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd)
3496 != BFD_MACH_O_SECTION_64_SIZE)
3497 return NULL;
3498
3499 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname);
3500 if (sec == NULL)
3501 return NULL;
3502
3503 section = bfd_mach_o_get_mach_o_section (sec);
3504 memcpy (section->segname, raw.segname, sizeof (raw.segname));
3505 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0;
3506 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname));
3507 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0;
3508 section->addr = bfd_h_get_64 (abfd, raw.addr);
3509 section->size = bfd_h_get_64 (abfd, raw.size);
3510 section->offset = bfd_h_get_32 (abfd, raw.offset);
3511 section->align = bfd_h_get_32 (abfd, raw.align);
3512 if (section->align > 64)
3513 {
3514 (*_bfd_error_handler) (_("bfd_mach_o_read_section_64: overlarge alignment value: 0x%x, using 32 instead"),
3515 section->align);
3516 section->align = 32;
3517 }
3518 section->reloff = bfd_h_get_32 (abfd, raw.reloff);
3519 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc);
3520 section->flags = bfd_h_get_32 (abfd, raw.flags);
3521 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1);
3522 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2);
3523 section->reserved3 = bfd_h_get_32 (abfd, raw.reserved3);
3524
3525 bfd_mach_o_init_section_from_mach_o (abfd, sec, prot);
3526
3527 return sec;
3528 }
3529
3530 static asection *
3531 bfd_mach_o_read_section (bfd *abfd, unsigned long prot, unsigned int wide)
3532 {
3533 if (wide)
3534 return bfd_mach_o_read_section_64 (abfd, prot);
3535 else
3536 return bfd_mach_o_read_section_32 (abfd, prot);
3537 }
3538
3539 static bfd_boolean
3540 bfd_mach_o_read_symtab_symbol (bfd *abfd,
3541 bfd_mach_o_symtab_command *sym,
3542 bfd_mach_o_asymbol *s,
3543 unsigned long i)
3544 {
3545 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3546 unsigned int wide = mach_o_wide_p (&mdata->header);
3547 unsigned int symwidth =
3548 wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE;
3549 unsigned int symoff = sym->symoff + (i * symwidth);
3550 struct mach_o_nlist_64_external raw;
3551 unsigned char type = -1;
3552 unsigned char section = -1;
3553 short desc = -1;
3554 symvalue value = -1;
3555 unsigned long stroff = -1;
3556 unsigned int symtype = -1;
3557
3558 BFD_ASSERT (sym->strtab != NULL);
3559
3560 if (bfd_seek (abfd, symoff, SEEK_SET) != 0
3561 || bfd_bread (&raw, symwidth, abfd) != symwidth)
3562 {
3563 (*_bfd_error_handler)
3564 (_("bfd_mach_o_read_symtab_symbol: unable to read %d bytes at %lu"),
3565 symwidth, (unsigned long) symoff);
3566 return FALSE;
3567 }
3568
3569 stroff = bfd_h_get_32 (abfd, raw.n_strx);
3570 type = bfd_h_get_8 (abfd, raw.n_type);
3571 symtype = type & BFD_MACH_O_N_TYPE;
3572 section = bfd_h_get_8 (abfd, raw.n_sect);
3573 desc = bfd_h_get_16 (abfd, raw.n_desc);
3574 if (wide)
3575 value = bfd_h_get_64 (abfd, raw.n_value);
3576 else
3577 value = bfd_h_get_32 (abfd, raw.n_value);
3578
3579 if (stroff >= sym->strsize)
3580 {
3581 (*_bfd_error_handler)
3582 (_("bfd_mach_o_read_symtab_symbol: name out of range (%lu >= %lu)"),
3583 (unsigned long) stroff,
3584 (unsigned long) sym->strsize);
3585 return FALSE;
3586 }
3587
3588 s->symbol.the_bfd = abfd;
3589 s->symbol.name = sym->strtab + stroff;
3590 s->symbol.value = value;
3591 s->symbol.flags = 0x0;
3592 s->symbol.udata.i = i;
3593 s->n_type = type;
3594 s->n_sect = section;
3595 s->n_desc = desc;
3596
3597 if (type & BFD_MACH_O_N_STAB)
3598 {
3599 s->symbol.flags |= BSF_DEBUGGING;
3600 s->symbol.section = bfd_und_section_ptr;
3601 switch (type)
3602 {
3603 case N_FUN:
3604 case N_STSYM:
3605 case N_LCSYM:
3606 case N_BNSYM:
3607 case N_SLINE:
3608 case N_ENSYM:
3609 case N_ECOMM:
3610 case N_ECOML:
3611 case N_GSYM:
3612 if ((section > 0) && (section <= mdata->nsects))
3613 {
3614 s->symbol.section = mdata->sections[section - 1]->bfdsection;
3615 s->symbol.value =
3616 s->symbol.value - mdata->sections[section - 1]->addr;
3617 }
3618 break;
3619 }
3620 }
3621 else
3622 {
3623 if (type & (BFD_MACH_O_N_PEXT | BFD_MACH_O_N_EXT))
3624 s->symbol.flags |= BSF_GLOBAL;
3625 else
3626 s->symbol.flags |= BSF_LOCAL;
3627
3628 switch (symtype)
3629 {
3630 case BFD_MACH_O_N_UNDF:
3631 if (type == (BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT)
3632 && s->symbol.value != 0)
3633 {
3634 /* A common symbol. */
3635 s->symbol.section = bfd_com_section_ptr;
3636 s->symbol.flags = BSF_NO_FLAGS;
3637 }
3638 else
3639 {
3640 s->symbol.section = bfd_und_section_ptr;
3641 if (s->n_desc & BFD_MACH_O_N_WEAK_REF)
3642 s->symbol.flags |= BSF_WEAK;
3643 }
3644 break;
3645 case BFD_MACH_O_N_PBUD:
3646 s->symbol.section = bfd_und_section_ptr;
3647 break;
3648 case BFD_MACH_O_N_ABS:
3649 s->symbol.section = bfd_abs_section_ptr;
3650 break;
3651 case BFD_MACH_O_N_SECT:
3652 if ((section > 0) && (section <= mdata->nsects))
3653 {
3654 s->symbol.section = mdata->sections[section - 1]->bfdsection;
3655 s->symbol.value =
3656 s->symbol.value - mdata->sections[section - 1]->addr;
3657 }
3658 else
3659 {
3660 /* Mach-O uses 0 to mean "no section"; not an error. */
3661 if (section != 0)
3662 {
3663 (*_bfd_error_handler) (_("bfd_mach_o_read_symtab_symbol: "
3664 "symbol \"%s\" specified invalid section %d (max %lu): setting to undefined"),
3665 s->symbol.name, section, mdata->nsects);
3666 }
3667 s->symbol.section = bfd_und_section_ptr;
3668 }
3669 break;
3670 case BFD_MACH_O_N_INDR:
3671 /* FIXME: we don't follow the BFD convention as this indirect symbol
3672 won't be followed by the referenced one. This looks harmless
3673 unless we start using the linker. */
3674 s->symbol.flags |= BSF_INDIRECT;
3675 s->symbol.section = bfd_ind_section_ptr;
3676 s->symbol.value = 0;
3677 break;
3678 default:
3679 (*_bfd_error_handler) (_("bfd_mach_o_read_symtab_symbol: "
3680 "symbol \"%s\" specified invalid type field 0x%x: setting to undefined"),
3681 s->symbol.name, symtype);
3682 s->symbol.section = bfd_und_section_ptr;
3683 break;
3684 }
3685 }
3686
3687 return TRUE;
3688 }
3689
3690 bfd_boolean
3691 bfd_mach_o_read_symtab_strtab (bfd *abfd)
3692 {
3693 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3694 bfd_mach_o_symtab_command *sym = mdata->symtab;
3695
3696 /* Fail if there is no symtab. */
3697 if (sym == NULL)
3698 return FALSE;
3699
3700 /* Success if already loaded. */
3701 if (sym->strtab)
3702 return TRUE;
3703
3704 if (abfd->flags & BFD_IN_MEMORY)
3705 {
3706 struct bfd_in_memory *b;
3707
3708 b = (struct bfd_in_memory *) abfd->iostream;
3709
3710 if ((sym->stroff + sym->strsize) > b->size)
3711 {
3712 bfd_set_error (bfd_error_file_truncated);
3713 return FALSE;
3714 }
3715 sym->strtab = (char *) b->buffer + sym->stroff;
3716 }
3717 else
3718 {
3719 sym->strtab = bfd_alloc (abfd, sym->strsize + 1);
3720 if (sym->strtab == NULL)
3721 return FALSE;
3722
3723 if (bfd_seek (abfd, sym->stroff, SEEK_SET) != 0
3724 || bfd_bread (sym->strtab, sym->strsize, abfd) != sym->strsize)
3725 {
3726 /* PR 17512: file: 10888-1609-0.004. */
3727 bfd_release (abfd, sym->strtab);
3728 sym->strtab = NULL;
3729 bfd_set_error (bfd_error_file_truncated);
3730 return FALSE;
3731 }
3732 /* Zero terminate the string table. */
3733 sym->strtab[sym->strsize] = 0;
3734 }
3735
3736 return TRUE;
3737 }
3738
3739 bfd_boolean
3740 bfd_mach_o_read_symtab_symbols (bfd *abfd)
3741 {
3742 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3743 bfd_mach_o_symtab_command *sym = mdata->symtab;
3744 unsigned long i;
3745
3746 if (sym == NULL || sym->symbols)
3747 /* Return now if there are no symbols or if already loaded. */
3748 return TRUE;
3749
3750 sym->symbols = bfd_alloc2 (abfd, sym->nsyms, sizeof (bfd_mach_o_asymbol));
3751 if (sym->symbols == NULL)
3752 {
3753 (*_bfd_error_handler) (_("bfd_mach_o_read_symtab_symbols: unable to allocate memory for symbols"));
3754 sym->nsyms = 0;
3755 return FALSE;
3756 }
3757
3758 if (!bfd_mach_o_read_symtab_strtab (abfd))
3759 goto fail;
3760
3761 for (i = 0; i < sym->nsyms; i++)
3762 if (!bfd_mach_o_read_symtab_symbol (abfd, sym, &sym->symbols[i], i))
3763 goto fail;
3764
3765 return TRUE;
3766
3767 fail:
3768 bfd_release (abfd, sym->symbols);
3769 sym->symbols = NULL;
3770 sym->nsyms = 0;
3771 return FALSE;
3772 }
3773
3774 static const char *
3775 bfd_mach_o_i386_flavour_string (unsigned int flavour)
3776 {
3777 switch ((int) flavour)
3778 {
3779 case BFD_MACH_O_x86_THREAD_STATE32: return "x86_THREAD_STATE32";
3780 case BFD_MACH_O_x86_FLOAT_STATE32: return "x86_FLOAT_STATE32";
3781 case BFD_MACH_O_x86_EXCEPTION_STATE32: return "x86_EXCEPTION_STATE32";
3782 case BFD_MACH_O_x86_THREAD_STATE64: return "x86_THREAD_STATE64";
3783 case BFD_MACH_O_x86_FLOAT_STATE64: return "x86_FLOAT_STATE64";
3784 case BFD_MACH_O_x86_EXCEPTION_STATE64: return "x86_EXCEPTION_STATE64";
3785 case BFD_MACH_O_x86_THREAD_STATE: return "x86_THREAD_STATE";
3786 case BFD_MACH_O_x86_FLOAT_STATE: return "x86_FLOAT_STATE";
3787 case BFD_MACH_O_x86_EXCEPTION_STATE: return "x86_EXCEPTION_STATE";
3788 case BFD_MACH_O_x86_DEBUG_STATE32: return "x86_DEBUG_STATE32";
3789 case BFD_MACH_O_x86_DEBUG_STATE64: return "x86_DEBUG_STATE64";
3790 case BFD_MACH_O_x86_DEBUG_STATE: return "x86_DEBUG_STATE";
3791 case BFD_MACH_O_x86_THREAD_STATE_NONE: return "x86_THREAD_STATE_NONE";
3792 default: return "UNKNOWN";
3793 }
3794 }
3795
3796 static const char *
3797 bfd_mach_o_ppc_flavour_string (unsigned int flavour)
3798 {
3799 switch ((int) flavour)
3800 {
3801 case BFD_MACH_O_PPC_THREAD_STATE: return "PPC_THREAD_STATE";
3802 case BFD_MACH_O_PPC_FLOAT_STATE: return "PPC_FLOAT_STATE";
3803 case BFD_MACH_O_PPC_EXCEPTION_STATE: return "PPC_EXCEPTION_STATE";
3804 case BFD_MACH_O_PPC_VECTOR_STATE: return "PPC_VECTOR_STATE";
3805 case BFD_MACH_O_PPC_THREAD_STATE64: return "PPC_THREAD_STATE64";
3806 case BFD_MACH_O_PPC_EXCEPTION_STATE64: return "PPC_EXCEPTION_STATE64";
3807 default: return "UNKNOWN";
3808 }
3809 }
3810
3811 static bfd_boolean
3812 bfd_mach_o_read_dylinker (bfd *abfd, bfd_mach_o_load_command *command)
3813 {
3814 bfd_mach_o_dylinker_command *cmd = &command->command.dylinker;
3815 struct mach_o_str_command_external raw;
3816 unsigned int nameoff;
3817 unsigned int namelen;
3818
3819 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3820 return FALSE;
3821
3822 nameoff = bfd_h_get_32 (abfd, raw.str);
3823
3824 cmd->name_offset = nameoff;
3825 namelen = command->len - nameoff;
3826 nameoff += command->offset;
3827 cmd->name_str = bfd_alloc (abfd, namelen);
3828 if (cmd->name_str == NULL)
3829 return FALSE;
3830 if (bfd_seek (abfd, nameoff, SEEK_SET) != 0
3831 || bfd_bread (cmd->name_str, namelen, abfd) != namelen)
3832 return FALSE;
3833 return TRUE;
3834 }
3835
3836 static bfd_boolean
3837 bfd_mach_o_read_dylib (bfd *abfd, bfd_mach_o_load_command *command)
3838 {
3839 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3840 bfd_mach_o_dylib_command *cmd = &command->command.dylib;
3841 struct mach_o_dylib_command_external raw;
3842 unsigned int nameoff;
3843 unsigned int namelen;
3844
3845 switch (command->type)
3846 {
3847 case BFD_MACH_O_LC_LOAD_DYLIB:
3848 case BFD_MACH_O_LC_LAZY_LOAD_DYLIB:
3849 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
3850 case BFD_MACH_O_LC_ID_DYLIB:
3851 case BFD_MACH_O_LC_REEXPORT_DYLIB:
3852 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
3853 break;
3854 default:
3855 BFD_FAIL ();
3856 return FALSE;
3857 }
3858
3859 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3860 return FALSE;
3861
3862 nameoff = bfd_h_get_32 (abfd, raw.name);
3863 cmd->timestamp = bfd_h_get_32 (abfd, raw.timestamp);
3864 cmd->current_version = bfd_h_get_32 (abfd, raw.current_version);
3865 cmd->compatibility_version = bfd_h_get_32 (abfd, raw.compatibility_version);
3866
3867 cmd->name_offset = command->offset + nameoff;
3868 namelen = command->len - nameoff;
3869 cmd->name_str = bfd_alloc (abfd, namelen);
3870 if (cmd->name_str == NULL)
3871 return FALSE;
3872 if (bfd_seek (abfd, mdata->hdr_offset + cmd->name_offset, SEEK_SET) != 0
3873 || bfd_bread (cmd->name_str, namelen, abfd) != namelen)
3874 return FALSE;
3875 return TRUE;
3876 }
3877
3878 static bfd_boolean
3879 bfd_mach_o_read_prebound_dylib (bfd *abfd,
3880 bfd_mach_o_load_command *command)
3881 {
3882 bfd_mach_o_prebound_dylib_command *cmd = &command->command.prebound_dylib;
3883 struct mach_o_prebound_dylib_command_external raw;
3884 unsigned int nameoff;
3885 unsigned int modoff;
3886 unsigned int str_len;
3887 unsigned char *str;
3888
3889 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3890 return FALSE;
3891
3892 nameoff = bfd_h_get_32 (abfd, raw.name);
3893 modoff = bfd_h_get_32 (abfd, raw.linked_modules);
3894 if (nameoff > command->len || modoff > command->len)
3895 return FALSE;
3896
3897 str_len = command->len - sizeof (raw);
3898 str = bfd_alloc (abfd, str_len);
3899 if (str == NULL)
3900 return FALSE;
3901 if (bfd_bread (str, str_len, abfd) != str_len)
3902 return FALSE;
3903
3904 cmd->name_offset = command->offset + nameoff;
3905 cmd->nmodules = bfd_h_get_32 (abfd, raw.nmodules);
3906 cmd->linked_modules_offset = command->offset + modoff;
3907
3908 cmd->name_str = (char *)str + nameoff - (sizeof (raw) + BFD_MACH_O_LC_SIZE);
3909 cmd->linked_modules = str + modoff - (sizeof (raw) + BFD_MACH_O_LC_SIZE);
3910 return TRUE;
3911 }
3912
3913 static bfd_boolean
3914 bfd_mach_o_read_prebind_cksum (bfd *abfd,
3915 bfd_mach_o_load_command *command)
3916 {
3917 bfd_mach_o_prebind_cksum_command *cmd = &command->command.prebind_cksum;
3918 struct mach_o_prebind_cksum_command_external raw;
3919
3920 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3921 return FALSE;
3922
3923 cmd->cksum = bfd_get_32 (abfd, raw.cksum);
3924 return TRUE;
3925 }
3926
3927 static bfd_boolean
3928 bfd_mach_o_read_twolevel_hints (bfd *abfd,
3929 bfd_mach_o_load_command *command)
3930 {
3931 bfd_mach_o_twolevel_hints_command *cmd = &command->command.twolevel_hints;
3932 struct mach_o_twolevel_hints_command_external raw;
3933
3934 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3935 return FALSE;
3936
3937 cmd->offset = bfd_get_32 (abfd, raw.offset);
3938 cmd->nhints = bfd_get_32 (abfd, raw.nhints);
3939 return TRUE;
3940 }
3941
3942 static bfd_boolean
3943 bfd_mach_o_read_fvmlib (bfd *abfd, bfd_mach_o_load_command *command)
3944 {
3945 bfd_mach_o_fvmlib_command *fvm = &command->command.fvmlib;
3946 struct mach_o_fvmlib_command_external raw;
3947 unsigned int nameoff;
3948 unsigned int namelen;
3949
3950 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3951 return FALSE;
3952
3953 nameoff = bfd_h_get_32 (abfd, raw.name);
3954 fvm->minor_version = bfd_h_get_32 (abfd, raw.minor_version);
3955 fvm->header_addr = bfd_h_get_32 (abfd, raw.header_addr);
3956
3957 fvm->name_offset = command->offset + nameoff;
3958 namelen = command->len - nameoff;
3959 fvm->name_str = bfd_alloc (abfd, namelen);
3960 if (fvm->name_str == NULL)
3961 return FALSE;
3962 if (bfd_seek (abfd, fvm->name_offset, SEEK_SET) != 0
3963 || bfd_bread (fvm->name_str, namelen, abfd) != namelen)
3964 return FALSE;
3965 return TRUE;
3966 }
3967
3968 static bfd_boolean
3969 bfd_mach_o_read_thread (bfd *abfd, bfd_mach_o_load_command *command)
3970 {
3971 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3972 bfd_mach_o_thread_command *cmd = &command->command.thread;
3973 unsigned int offset;
3974 unsigned int nflavours;
3975 unsigned int i;
3976
3977 BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD)
3978 || (command->type == BFD_MACH_O_LC_UNIXTHREAD));
3979
3980 /* Count the number of threads. */
3981 offset = 8;
3982 nflavours = 0;
3983 while (offset != command->len)
3984 {
3985 struct mach_o_thread_command_external raw;
3986
3987 if (offset >= command->len)
3988 return FALSE;
3989
3990 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
3991 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3992 return FALSE;
3993
3994 offset += sizeof (raw) + bfd_h_get_32 (abfd, raw.count) * 4;
3995 nflavours++;
3996 }
3997
3998 /* Allocate threads. */
3999 cmd->flavours = bfd_alloc2
4000 (abfd, nflavours, sizeof (bfd_mach_o_thread_flavour));
4001 if (cmd->flavours == NULL)
4002 return FALSE;
4003 cmd->nflavours = nflavours;
4004
4005 offset = 8;
4006 nflavours = 0;
4007 while (offset != command->len)
4008 {
4009 struct mach_o_thread_command_external raw;
4010
4011 if (offset >= command->len)
4012 return FALSE;
4013
4014 if (nflavours >= cmd->nflavours)
4015 return FALSE;
4016
4017 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
4018 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4019 return FALSE;
4020
4021 cmd->flavours[nflavours].flavour = bfd_h_get_32 (abfd, raw.flavour);
4022 cmd->flavours[nflavours].offset = command->offset + offset + sizeof (raw);
4023 cmd->flavours[nflavours].size = bfd_h_get_32 (abfd, raw.count) * 4;
4024 offset += cmd->flavours[nflavours].size + sizeof (raw);
4025 nflavours++;
4026 }
4027
4028 for (i = 0; i < nflavours; i++)
4029 {
4030 asection *bfdsec;
4031 unsigned int snamelen;
4032 char *sname;
4033 const char *flavourstr;
4034 const char *prefix = "LC_THREAD";
4035 unsigned int j = 0;
4036
4037 switch (mdata->header.cputype)
4038 {
4039 case BFD_MACH_O_CPU_TYPE_POWERPC:
4040 case BFD_MACH_O_CPU_TYPE_POWERPC_64:
4041 flavourstr =
4042 bfd_mach_o_ppc_flavour_string (cmd->flavours[i].flavour);
4043 break;
4044 case BFD_MACH_O_CPU_TYPE_I386:
4045 case BFD_MACH_O_CPU_TYPE_X86_64:
4046 flavourstr =
4047 bfd_mach_o_i386_flavour_string (cmd->flavours[i].flavour);
4048 break;
4049 default:
4050 flavourstr = "UNKNOWN_ARCHITECTURE";
4051 break;
4052 }
4053
4054 snamelen = strlen (prefix) + 1 + 20 + 1 + strlen (flavourstr) + 1;
4055 sname = bfd_alloc (abfd, snamelen);
4056 if (sname == NULL)
4057 return FALSE;
4058
4059 for (;;)
4060 {
4061 sprintf (sname, "%s.%s.%u", prefix, flavourstr, j);
4062 if (bfd_get_section_by_name (abfd, sname) == NULL)
4063 break;
4064 j++;
4065 }
4066
4067 bfdsec = bfd_make_section_with_flags (abfd, sname, SEC_HAS_CONTENTS);
4068
4069 bfdsec->vma = 0;
4070 bfdsec->lma = 0;
4071 bfdsec->size = cmd->flavours[i].size;
4072 bfdsec->filepos = cmd->flavours[i].offset;
4073 bfdsec->alignment_power = 0x0;
4074
4075 cmd->section = bfdsec;
4076 }
4077
4078 return TRUE;
4079 }
4080
4081 static bfd_boolean
4082 bfd_mach_o_read_dysymtab (bfd *abfd, bfd_mach_o_load_command *command)
4083 {
4084 bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab;
4085 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4086
4087 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB);
4088
4089 {
4090 struct mach_o_dysymtab_command_external raw;
4091
4092 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4093 return FALSE;
4094
4095 cmd->ilocalsym = bfd_h_get_32 (abfd, raw.ilocalsym);
4096 cmd->nlocalsym = bfd_h_get_32 (abfd, raw.nlocalsym);
4097 cmd->iextdefsym = bfd_h_get_32 (abfd, raw.iextdefsym);
4098 cmd->nextdefsym = bfd_h_get_32 (abfd, raw.nextdefsym);
4099 cmd->iundefsym = bfd_h_get_32 (abfd, raw.iundefsym);
4100 cmd->nundefsym = bfd_h_get_32 (abfd, raw.nundefsym);
4101 cmd->tocoff = bfd_h_get_32 (abfd, raw.tocoff);
4102 cmd->ntoc = bfd_h_get_32 (abfd, raw.ntoc);
4103 cmd->modtaboff = bfd_h_get_32 (abfd, raw.modtaboff);
4104 cmd->nmodtab = bfd_h_get_32 (abfd, raw.nmodtab);
4105 cmd->extrefsymoff = bfd_h_get_32 (abfd, raw.extrefsymoff);
4106 cmd->nextrefsyms = bfd_h_get_32 (abfd, raw.nextrefsyms);
4107 cmd->indirectsymoff = bfd_h_get_32 (abfd, raw.indirectsymoff);
4108 cmd->nindirectsyms = bfd_h_get_32 (abfd, raw.nindirectsyms);
4109 cmd->extreloff = bfd_h_get_32 (abfd, raw.extreloff);
4110 cmd->nextrel = bfd_h_get_32 (abfd, raw.nextrel);
4111 cmd->locreloff = bfd_h_get_32 (abfd, raw.locreloff);
4112 cmd->nlocrel = bfd_h_get_32 (abfd, raw.nlocrel);
4113 }
4114
4115 if (cmd->nmodtab != 0)
4116 {
4117 unsigned int i;
4118 int wide = bfd_mach_o_wide_p (abfd);
4119 unsigned int module_len = wide ? 56 : 52;
4120
4121 cmd->dylib_module =
4122 bfd_alloc2 (abfd, cmd->nmodtab, sizeof (bfd_mach_o_dylib_module));
4123 if (cmd->dylib_module == NULL)
4124 return FALSE;
4125
4126 if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0)
4127 return FALSE;
4128
4129 for (i = 0; i < cmd->nmodtab; i++)
4130 {
4131 bfd_mach_o_dylib_module *module = &cmd->dylib_module[i];
4132 unsigned long v;
4133 unsigned char buf[56];
4134
4135 if (bfd_bread ((void *) buf, module_len, abfd) != module_len)
4136 return FALSE;
4137
4138 module->module_name_idx = bfd_h_get_32 (abfd, buf + 0);
4139 module->iextdefsym = bfd_h_get_32 (abfd, buf + 4);
4140 module->nextdefsym = bfd_h_get_32 (abfd, buf + 8);
4141 module->irefsym = bfd_h_get_32 (abfd, buf + 12);
4142 module->nrefsym = bfd_h_get_32 (abfd, buf + 16);
4143 module->ilocalsym = bfd_h_get_32 (abfd, buf + 20);
4144 module->nlocalsym = bfd_h_get_32 (abfd, buf + 24);
4145 module->iextrel = bfd_h_get_32 (abfd, buf + 28);
4146 module->nextrel = bfd_h_get_32 (abfd, buf + 32);
4147 v = bfd_h_get_32 (abfd, buf +36);
4148 module->iinit = v & 0xffff;
4149 module->iterm = (v >> 16) & 0xffff;
4150 v = bfd_h_get_32 (abfd, buf + 40);
4151 module->ninit = v & 0xffff;
4152 module->nterm = (v >> 16) & 0xffff;
4153 if (wide)
4154 {
4155 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 44);
4156 module->objc_module_info_addr = bfd_h_get_64 (abfd, buf + 48);
4157 }
4158 else
4159 {
4160 module->objc_module_info_addr = bfd_h_get_32 (abfd, buf + 44);
4161 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 48);
4162 }
4163 }
4164 }
4165
4166 if (cmd->ntoc != 0)
4167 {
4168 unsigned long i;
4169
4170 cmd->dylib_toc = bfd_alloc2
4171 (abfd, cmd->ntoc, sizeof (bfd_mach_o_dylib_table_of_content));
4172 if (cmd->dylib_toc == NULL)
4173 return FALSE;
4174
4175 if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0)
4176 return FALSE;
4177
4178 for (i = 0; i < cmd->ntoc; i++)
4179 {
4180 struct mach_o_dylib_table_of_contents_external raw;
4181 bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i];
4182
4183 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4184 return FALSE;
4185
4186 toc->symbol_index = bfd_h_get_32 (abfd, raw.symbol_index);
4187 toc->module_index = bfd_h_get_32 (abfd, raw.module_index);
4188 }
4189 }
4190
4191 if (cmd->nindirectsyms != 0)
4192 {
4193 unsigned int i;
4194
4195 cmd->indirect_syms = bfd_alloc2
4196 (abfd, cmd->nindirectsyms, sizeof (unsigned int));
4197 if (cmd->indirect_syms == NULL)
4198 return FALSE;
4199
4200 if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0)
4201 return FALSE;
4202
4203 for (i = 0; i < cmd->nindirectsyms; i++)
4204 {
4205 unsigned char raw[4];
4206 unsigned int *is = &cmd->indirect_syms[i];
4207
4208 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw))
4209 return FALSE;
4210
4211 *is = bfd_h_get_32 (abfd, raw);
4212 }
4213 }
4214
4215 if (cmd->nextrefsyms != 0)
4216 {
4217 unsigned long v;
4218 unsigned int i;
4219
4220 cmd->ext_refs = bfd_alloc2
4221 (abfd, cmd->nextrefsyms, sizeof (bfd_mach_o_dylib_reference));
4222 if (cmd->ext_refs == NULL)
4223 return FALSE;
4224
4225 if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0)
4226 return FALSE;
4227
4228 for (i = 0; i < cmd->nextrefsyms; i++)
4229 {
4230 unsigned char raw[4];
4231 bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i];
4232
4233 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw))
4234 return FALSE;
4235
4236 /* Fields isym and flags are written as bit-fields, thus we need
4237 a specific processing for endianness. */
4238 v = bfd_h_get_32 (abfd, raw);
4239 if (bfd_big_endian (abfd))
4240 {
4241 ref->isym = (v >> 8) & 0xffffff;
4242 ref->flags = v & 0xff;
4243 }
4244 else
4245 {
4246 ref->isym = v & 0xffffff;
4247 ref->flags = (v >> 24) & 0xff;
4248 }
4249 }
4250 }
4251
4252 if (mdata->dysymtab)
4253 return FALSE;
4254 mdata->dysymtab = cmd;
4255
4256 return TRUE;
4257 }
4258
4259 static bfd_boolean
4260 bfd_mach_o_read_symtab (bfd *abfd, bfd_mach_o_load_command *command)
4261 {
4262 bfd_mach_o_symtab_command *symtab = &command->command.symtab;
4263 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4264 struct mach_o_symtab_command_external raw;
4265
4266 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB);
4267
4268 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4269 return FALSE;
4270
4271 symtab->symoff = bfd_h_get_32 (abfd, raw.symoff);
4272 symtab->nsyms = bfd_h_get_32 (abfd, raw.nsyms);
4273 symtab->stroff = bfd_h_get_32 (abfd, raw.stroff);
4274 symtab->strsize = bfd_h_get_32 (abfd, raw.strsize);
4275 symtab->symbols = NULL;
4276 symtab->strtab = NULL;
4277
4278 if (symtab->nsyms != 0)
4279 abfd->flags |= HAS_SYMS;
4280
4281 if (mdata->symtab)
4282 return FALSE;
4283 mdata->symtab = symtab;
4284 return TRUE;
4285 }
4286
4287 static bfd_boolean
4288 bfd_mach_o_read_uuid (bfd *abfd, bfd_mach_o_load_command *command)
4289 {
4290 bfd_mach_o_uuid_command *cmd = &command->command.uuid;
4291
4292 BFD_ASSERT (command->type == BFD_MACH_O_LC_UUID);
4293
4294 if (bfd_bread (cmd->uuid, 16, abfd) != 16)
4295 return FALSE;
4296
4297 return TRUE;
4298 }
4299
4300 static bfd_boolean
4301 bfd_mach_o_read_linkedit (bfd *abfd, bfd_mach_o_load_command *command)
4302 {
4303 bfd_mach_o_linkedit_command *cmd = &command->command.linkedit;
4304 struct mach_o_linkedit_data_command_external raw;
4305
4306 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4307 return FALSE;
4308
4309 cmd->dataoff = bfd_get_32 (abfd, raw.dataoff);
4310 cmd->datasize = bfd_get_32 (abfd, raw.datasize);
4311 return TRUE;
4312 }
4313
4314 static bfd_boolean
4315 bfd_mach_o_read_str (bfd *abfd, bfd_mach_o_load_command *command)
4316 {
4317 bfd_mach_o_str_command *cmd = &command->command.str;
4318 struct mach_o_str_command_external raw;
4319 unsigned long off;
4320
4321 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4322 return FALSE;
4323
4324 off = bfd_get_32 (abfd, raw.str);
4325 cmd->stroff = command->offset + off;
4326 cmd->str_len = command->len - off;
4327 cmd->str = bfd_alloc (abfd, cmd->str_len);
4328 if (cmd->str == NULL)
4329 return FALSE;
4330 if (bfd_seek (abfd, cmd->stroff, SEEK_SET) != 0
4331 || bfd_bread ((void *) cmd->str, cmd->str_len, abfd) != cmd->str_len)
4332 return FALSE;
4333 return TRUE;
4334 }
4335
4336 static unsigned char *
4337 bfd_mach_o_alloc_and_read (bfd *abfd, unsigned int off, unsigned int size)
4338 {
4339 unsigned char *buf;
4340
4341 buf = bfd_alloc (abfd, size);
4342 if (buf == NULL)
4343 return NULL;
4344 if (bfd_seek (abfd, off, SEEK_SET) != 0
4345 || bfd_bread (buf, size, abfd) != size)
4346 return NULL;
4347 return buf;
4348 }
4349
4350 static bfd_boolean
4351 bfd_mach_o_read_dyld_content (bfd *abfd, bfd_mach_o_dyld_info_command *cmd)
4352 {
4353 /* Read rebase content. */
4354 if (cmd->rebase_content == NULL && cmd->rebase_size != 0)
4355 {
4356 cmd->rebase_content =
4357 bfd_mach_o_alloc_and_read (abfd, cmd->rebase_off, cmd->rebase_size);
4358 if (cmd->rebase_content == NULL)
4359 return FALSE;
4360 }
4361
4362 /* Read bind content. */
4363 if (cmd->bind_content == NULL && cmd->bind_size != 0)
4364 {
4365 cmd->bind_content =
4366 bfd_mach_o_alloc_and_read (abfd, cmd->bind_off, cmd->bind_size);
4367 if (cmd->bind_content == NULL)
4368 return FALSE;
4369 }
4370
4371 /* Read weak bind content. */
4372 if (cmd->weak_bind_content == NULL && cmd->weak_bind_size != 0)
4373 {
4374 cmd->weak_bind_content = bfd_mach_o_alloc_and_read
4375 (abfd, cmd->weak_bind_off, cmd->weak_bind_size);
4376 if (cmd->weak_bind_content == NULL)
4377 return FALSE;
4378 }
4379
4380 /* Read lazy bind content. */
4381 if (cmd->lazy_bind_content == NULL && cmd->lazy_bind_size != 0)
4382 {
4383 cmd->lazy_bind_content = bfd_mach_o_alloc_and_read
4384 (abfd, cmd->lazy_bind_off, cmd->lazy_bind_size);
4385 if (cmd->lazy_bind_content == NULL)
4386 return FALSE;
4387 }
4388
4389 /* Read export content. */
4390 if (cmd->export_content == NULL && cmd->export_size != 0)
4391 {
4392 cmd->export_content = bfd_mach_o_alloc_and_read
4393 (abfd, cmd->export_off, cmd->export_size);
4394 if (cmd->export_content == NULL)
4395 return FALSE;
4396 }
4397
4398 return TRUE;
4399 }
4400
4401 static bfd_boolean
4402 bfd_mach_o_read_dyld_info (bfd *abfd, bfd_mach_o_load_command *command)
4403 {
4404 bfd_mach_o_dyld_info_command *cmd = &command->command.dyld_info;
4405 struct mach_o_dyld_info_command_external raw;
4406
4407 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4408 return FALSE;
4409
4410 cmd->rebase_off = bfd_get_32 (abfd, raw.rebase_off);
4411 cmd->rebase_size = bfd_get_32 (abfd, raw.rebase_size);
4412 cmd->rebase_content = NULL;
4413 cmd->bind_off = bfd_get_32 (abfd, raw.bind_off);
4414 cmd->bind_size = bfd_get_32 (abfd, raw.bind_size);
4415 cmd->bind_content = NULL;
4416 cmd->weak_bind_off = bfd_get_32 (abfd, raw.weak_bind_off);
4417 cmd->weak_bind_size = bfd_get_32 (abfd, raw.weak_bind_size);
4418 cmd->weak_bind_content = NULL;
4419 cmd->lazy_bind_off = bfd_get_32 (abfd, raw.lazy_bind_off);
4420 cmd->lazy_bind_size = bfd_get_32 (abfd, raw.lazy_bind_size);
4421 cmd->lazy_bind_content = NULL;
4422 cmd->export_off = bfd_get_32 (abfd, raw.export_off);
4423 cmd->export_size = bfd_get_32 (abfd, raw.export_size);
4424 cmd->export_content = NULL;
4425 return TRUE;
4426 }
4427
4428 static bfd_boolean
4429 bfd_mach_o_read_version_min (bfd *abfd, bfd_mach_o_load_command *command)
4430 {
4431 bfd_mach_o_version_min_command *cmd = &command->command.version_min;
4432 struct mach_o_version_min_command_external raw;
4433 unsigned int ver;
4434
4435 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4436 return FALSE;
4437
4438 ver = bfd_get_32 (abfd, raw.version);
4439 cmd->rel = ver >> 16;
4440 cmd->maj = ver >> 8;
4441 cmd->min = ver;
4442 cmd->reserved = bfd_get_32 (abfd, raw.reserved);
4443 return TRUE;
4444 }
4445
4446 static bfd_boolean
4447 bfd_mach_o_read_encryption_info (bfd *abfd, bfd_mach_o_load_command *command)
4448 {
4449 bfd_mach_o_encryption_info_command *cmd = &command->command.encryption_info;
4450 struct mach_o_encryption_info_command_external raw;
4451
4452 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4453 return FALSE;
4454
4455 cmd->cryptoff = bfd_get_32 (abfd, raw.cryptoff);
4456 cmd->cryptsize = bfd_get_32 (abfd, raw.cryptsize);
4457 cmd->cryptid = bfd_get_32 (abfd, raw.cryptid);
4458 return TRUE;
4459 }
4460
4461 static bfd_boolean
4462 bfd_mach_o_read_encryption_info_64 (bfd *abfd, bfd_mach_o_load_command *command)
4463 {
4464 bfd_mach_o_encryption_info_command *cmd = &command->command.encryption_info;
4465 struct mach_o_encryption_info_64_command_external raw;
4466
4467 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4468 return FALSE;
4469
4470 cmd->cryptoff = bfd_get_32 (abfd, raw.cryptoff);
4471 cmd->cryptsize = bfd_get_32 (abfd, raw.cryptsize);
4472 cmd->cryptid = bfd_get_32 (abfd, raw.cryptid);
4473 return TRUE;
4474 }
4475
4476 static bfd_boolean
4477 bfd_mach_o_read_main (bfd *abfd, bfd_mach_o_load_command *command)
4478 {
4479 bfd_mach_o_main_command *cmd = &command->command.main;
4480 struct mach_o_entry_point_command_external raw;
4481
4482 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4483 return FALSE;
4484
4485 cmd->entryoff = bfd_get_64 (abfd, raw.entryoff);
4486 cmd->stacksize = bfd_get_64 (abfd, raw.stacksize);
4487 return TRUE;
4488 }
4489
4490 static bfd_boolean
4491 bfd_mach_o_read_source_version (bfd *abfd, bfd_mach_o_load_command *command)
4492 {
4493 bfd_mach_o_source_version_command *cmd = &command->command.source_version;
4494 struct mach_o_source_version_command_external raw;
4495 bfd_uint64_t ver;
4496
4497 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4498 return FALSE;
4499
4500 ver = bfd_get_64 (abfd, raw.version);
4501 /* Note: we use a serie of shift to avoid shift > 32 (for which gcc
4502 generates warnings) in case of the host doesn't support 64 bit
4503 integers. */
4504 cmd->e = ver & 0x3ff;
4505 ver >>= 10;
4506 cmd->d = ver & 0x3ff;
4507 ver >>= 10;
4508 cmd->c = ver & 0x3ff;
4509 ver >>= 10;
4510 cmd->b = ver & 0x3ff;
4511 ver >>= 10;
4512 cmd->a = ver & 0xffffff;
4513 return TRUE;
4514 }
4515
4516 static bfd_boolean
4517 bfd_mach_o_read_segment (bfd *abfd,
4518 bfd_mach_o_load_command *command,
4519 unsigned int wide)
4520 {
4521 bfd_mach_o_segment_command *seg = &command->command.segment;
4522 unsigned long i;
4523
4524 if (wide)
4525 {
4526 struct mach_o_segment_command_64_external raw;
4527
4528 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64);
4529
4530 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4531 return FALSE;
4532
4533 memcpy (seg->segname, raw.segname, 16);
4534 seg->segname[16] = '\0';
4535
4536 seg->vmaddr = bfd_h_get_64 (abfd, raw.vmaddr);
4537 seg->vmsize = bfd_h_get_64 (abfd, raw.vmsize);
4538 seg->fileoff = bfd_h_get_64 (abfd, raw.fileoff);
4539 seg->filesize = bfd_h_get_64 (abfd, raw.filesize);
4540 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot);
4541 seg->initprot = bfd_h_get_32 (abfd, raw.initprot);
4542 seg->nsects = bfd_h_get_32 (abfd, raw.nsects);
4543 seg->flags = bfd_h_get_32 (abfd, raw.flags);
4544 }
4545 else
4546 {
4547 struct mach_o_segment_command_32_external raw;
4548
4549 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT);
4550
4551 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4552 return FALSE;
4553
4554 memcpy (seg->segname, raw.segname, 16);
4555 seg->segname[16] = '\0';
4556
4557 seg->vmaddr = bfd_h_get_32 (abfd, raw.vmaddr);
4558 seg->vmsize = bfd_h_get_32 (abfd, raw.vmsize);
4559 seg->fileoff = bfd_h_get_32 (abfd, raw.fileoff);
4560 seg->filesize = bfd_h_get_32 (abfd, raw.filesize);
4561 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot);
4562 seg->initprot = bfd_h_get_32 (abfd, raw.initprot);
4563 seg->nsects = bfd_h_get_32 (abfd, raw.nsects);
4564 seg->flags = bfd_h_get_32 (abfd, raw.flags);
4565 }
4566 seg->sect_head = NULL;
4567 seg->sect_tail = NULL;
4568
4569 for (i = 0; i < seg->nsects; i++)
4570 {
4571 asection *sec;
4572
4573 sec = bfd_mach_o_read_section (abfd, seg->initprot, wide);
4574 if (sec == NULL)
4575 return FALSE;
4576
4577 bfd_mach_o_append_section_to_segment
4578 (seg, bfd_mach_o_get_mach_o_section (sec));
4579 }
4580
4581 return TRUE;
4582 }
4583
4584 static bfd_boolean
4585 bfd_mach_o_read_segment_32 (bfd *abfd, bfd_mach_o_load_command *command)
4586 {
4587 return bfd_mach_o_read_segment (abfd, command, 0);
4588 }
4589
4590 static bfd_boolean
4591 bfd_mach_o_read_segment_64 (bfd *abfd, bfd_mach_o_load_command *command)
4592 {
4593 return bfd_mach_o_read_segment (abfd, command, 1);
4594 }
4595
4596 static bfd_boolean
4597 bfd_mach_o_read_command (bfd *abfd, bfd_mach_o_load_command *command)
4598 {
4599 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4600 struct mach_o_load_command_external raw;
4601 unsigned int cmd;
4602
4603 /* Read command type and length. */
4604 if (bfd_seek (abfd, mdata->hdr_offset + command->offset, SEEK_SET) != 0
4605 || bfd_bread (&raw, BFD_MACH_O_LC_SIZE, abfd) != BFD_MACH_O_LC_SIZE)
4606 return FALSE;
4607
4608 cmd = bfd_h_get_32 (abfd, raw.cmd);
4609 command->type = cmd & ~BFD_MACH_O_LC_REQ_DYLD;
4610 command->type_required = cmd & BFD_MACH_O_LC_REQ_DYLD ? TRUE : FALSE;
4611 command->len = bfd_h_get_32 (abfd, raw.cmdsize);
4612
4613 switch (command->type)
4614 {
4615 case BFD_MACH_O_LC_SEGMENT:
4616 if (!bfd_mach_o_read_segment_32 (abfd, command))
4617 return FALSE;
4618 break;
4619 case BFD_MACH_O_LC_SEGMENT_64:
4620 if (!bfd_mach_o_read_segment_64 (abfd, command))
4621 return FALSE;
4622 break;
4623 case BFD_MACH_O_LC_SYMTAB:
4624 if (!bfd_mach_o_read_symtab (abfd, command))
4625 return FALSE;
4626 break;
4627 case BFD_MACH_O_LC_SYMSEG:
4628 break;
4629 case BFD_MACH_O_LC_THREAD:
4630 case BFD_MACH_O_LC_UNIXTHREAD:
4631 if (!bfd_mach_o_read_thread (abfd, command))
4632 return FALSE;
4633 break;
4634 case BFD_MACH_O_LC_LOAD_DYLINKER:
4635 case BFD_MACH_O_LC_ID_DYLINKER:
4636 case BFD_MACH_O_LC_DYLD_ENVIRONMENT:
4637 if (!bfd_mach_o_read_dylinker (abfd, command))
4638 return FALSE;
4639 break;
4640 case BFD_MACH_O_LC_LOAD_DYLIB:
4641 case BFD_MACH_O_LC_LAZY_LOAD_DYLIB:
4642 case BFD_MACH_O_LC_ID_DYLIB:
4643 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
4644 case BFD_MACH_O_LC_REEXPORT_DYLIB:
4645 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
4646 if (!bfd_mach_o_read_dylib (abfd, command))
4647 return FALSE;
4648 break;
4649 case BFD_MACH_O_LC_PREBOUND_DYLIB:
4650 if (!bfd_mach_o_read_prebound_dylib (abfd, command))
4651 return FALSE;
4652 break;
4653 case BFD_MACH_O_LC_LOADFVMLIB:
4654 case BFD_MACH_O_LC_IDFVMLIB:
4655 if (!bfd_mach_o_read_fvmlib (abfd, command))
4656 return FALSE;
4657 break;
4658 case BFD_MACH_O_LC_IDENT:
4659 case BFD_MACH_O_LC_FVMFILE:
4660 case BFD_MACH_O_LC_PREPAGE:
4661 case BFD_MACH_O_LC_ROUTINES:
4662 case BFD_MACH_O_LC_ROUTINES_64:
4663 break;
4664 case BFD_MACH_O_LC_SUB_FRAMEWORK:
4665 case BFD_MACH_O_LC_SUB_UMBRELLA:
4666 case BFD_MACH_O_LC_SUB_LIBRARY:
4667 case BFD_MACH_O_LC_SUB_CLIENT:
4668 case BFD_MACH_O_LC_RPATH:
4669 if (!bfd_mach_o_read_str (abfd, command))
4670 return FALSE;
4671 break;
4672 case BFD_MACH_O_LC_DYSYMTAB:
4673 if (!bfd_mach_o_read_dysymtab (abfd, command))
4674 return FALSE;
4675 break;
4676 case BFD_MACH_O_LC_PREBIND_CKSUM:
4677 if (!bfd_mach_o_read_prebind_cksum (abfd, command))
4678 return FALSE;
4679 break;
4680 case BFD_MACH_O_LC_TWOLEVEL_HINTS:
4681 if (!bfd_mach_o_read_twolevel_hints (abfd, command))
4682 return FALSE;
4683 break;
4684 case BFD_MACH_O_LC_UUID:
4685 if (!bfd_mach_o_read_uuid (abfd, command))
4686 return FALSE;
4687 break;
4688 case BFD_MACH_O_LC_CODE_SIGNATURE:
4689 case BFD_MACH_O_LC_SEGMENT_SPLIT_INFO:
4690 case BFD_MACH_O_LC_FUNCTION_STARTS:
4691 case BFD_MACH_O_LC_DATA_IN_CODE:
4692 case BFD_MACH_O_LC_DYLIB_CODE_SIGN_DRS:
4693 case BFD_MACH_O_LC_LINKER_OPTIMIZATION_HINT:
4694 if (!bfd_mach_o_read_linkedit (abfd, command))
4695 return FALSE;
4696 break;
4697 case BFD_MACH_O_LC_ENCRYPTION_INFO:
4698 if (!bfd_mach_o_read_encryption_info (abfd, command))
4699 return FALSE;
4700 break;
4701 case BFD_MACH_O_LC_ENCRYPTION_INFO_64:
4702 if (!bfd_mach_o_read_encryption_info_64 (abfd, command))
4703 return FALSE;
4704 break;
4705 case BFD_MACH_O_LC_DYLD_INFO:
4706 if (!bfd_mach_o_read_dyld_info (abfd, command))
4707 return FALSE;
4708 break;
4709 case BFD_MACH_O_LC_VERSION_MIN_MACOSX:
4710 case BFD_MACH_O_LC_VERSION_MIN_IPHONEOS:
4711 case BFD_MACH_O_LC_VERSION_MIN_WATCHOS:
4712 if (!bfd_mach_o_read_version_min (abfd, command))
4713 return FALSE;
4714 break;
4715 case BFD_MACH_O_LC_MAIN:
4716 if (!bfd_mach_o_read_main (abfd, command))
4717 return FALSE;
4718 break;
4719 case BFD_MACH_O_LC_SOURCE_VERSION:
4720 if (!bfd_mach_o_read_source_version (abfd, command))
4721 return FALSE;
4722 break;
4723 default:
4724 command->len = 0;
4725 (*_bfd_error_handler)(_("%B: unknown load command 0x%lx"),
4726 abfd, (unsigned long) command->type);
4727 return FALSE;
4728 }
4729
4730 return TRUE;
4731 }
4732
4733 static void
4734 bfd_mach_o_flatten_sections (bfd *abfd)
4735 {
4736 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4737 bfd_mach_o_load_command *cmd;
4738 long csect = 0;
4739
4740 /* Count total number of sections. */
4741 mdata->nsects = 0;
4742
4743 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
4744 {
4745 if (cmd->type == BFD_MACH_O_LC_SEGMENT
4746 || cmd->type == BFD_MACH_O_LC_SEGMENT_64)
4747 {
4748 bfd_mach_o_segment_command *seg = &cmd->command.segment;
4749
4750 mdata->nsects += seg->nsects;
4751 }
4752 }
4753
4754 /* Allocate sections array. */
4755 mdata->sections = bfd_alloc2 (abfd,
4756 mdata->nsects, sizeof (bfd_mach_o_section *));
4757
4758 /* Fill the array. */
4759 csect = 0;
4760
4761 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
4762 {
4763 if (cmd->type == BFD_MACH_O_LC_SEGMENT
4764 || cmd->type == BFD_MACH_O_LC_SEGMENT_64)
4765 {
4766 bfd_mach_o_segment_command *seg = &cmd->command.segment;
4767 bfd_mach_o_section *sec;
4768
4769 BFD_ASSERT (csect + seg->nsects <= mdata->nsects);
4770
4771 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
4772 mdata->sections[csect++] = sec;
4773 }
4774 }
4775 }
4776
4777 static bfd_boolean
4778 bfd_mach_o_scan_start_address (bfd *abfd)
4779 {
4780 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4781 bfd_mach_o_thread_command *thr = NULL;
4782 bfd_mach_o_load_command *cmd;
4783 unsigned long i;
4784
4785 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
4786 if (cmd->type == BFD_MACH_O_LC_THREAD
4787 || cmd->type == BFD_MACH_O_LC_UNIXTHREAD)
4788 {
4789 thr = &cmd->command.thread;
4790 break;
4791 }
4792 else if (cmd->type == BFD_MACH_O_LC_MAIN && mdata->nsects > 1)
4793 {
4794 bfd_mach_o_main_command *main_cmd = &cmd->command.main;
4795 bfd_mach_o_section *text_sect = mdata->sections[0];
4796
4797 if (text_sect)
4798 {
4799 abfd->start_address = main_cmd->entryoff
4800 + (text_sect->addr - text_sect->offset);
4801 return TRUE;
4802 }
4803 }
4804
4805 /* An object file has no start address, so do not fail if not found. */
4806 if (thr == NULL)
4807 return TRUE;
4808
4809 /* FIXME: create a subtarget hook ? */
4810 for (i = 0; i < thr->nflavours; i++)
4811 {
4812 if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_I386)
4813 && (thr->flavours[i].flavour == BFD_MACH_O_x86_THREAD_STATE32))
4814 {
4815 unsigned char buf[4];
4816
4817 if (bfd_seek (abfd, thr->flavours[i].offset + 40, SEEK_SET) != 0
4818 || bfd_bread (buf, 4, abfd) != 4)
4819 return FALSE;
4820
4821 abfd->start_address = bfd_h_get_32 (abfd, buf);
4822 }
4823 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC)
4824 && (thr->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE))
4825 {
4826 unsigned char buf[4];
4827
4828 if (bfd_seek (abfd, thr->flavours[i].offset + 0, SEEK_SET) != 0
4829 || bfd_bread (buf, 4, abfd) != 4)
4830 return FALSE;
4831
4832 abfd->start_address = bfd_h_get_32 (abfd, buf);
4833 }
4834 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC_64)
4835 && (thr->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE64))
4836 {
4837 unsigned char buf[8];
4838
4839 if (bfd_seek (abfd, thr->flavours[i].offset + 0, SEEK_SET) != 0
4840 || bfd_bread (buf, 8, abfd) != 8)
4841 return FALSE;
4842
4843 abfd->start_address = bfd_h_get_64 (abfd, buf);
4844 }
4845 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_X86_64)
4846 && (thr->flavours[i].flavour == BFD_MACH_O_x86_THREAD_STATE64))
4847 {
4848 unsigned char buf[8];
4849
4850 if (bfd_seek (abfd, thr->flavours[i].offset + (16 * 8), SEEK_SET) != 0
4851 || bfd_bread (buf, 8, abfd) != 8)
4852 return FALSE;
4853
4854 abfd->start_address = bfd_h_get_64 (abfd, buf);
4855 }
4856 }
4857
4858 return TRUE;
4859 }
4860
4861 bfd_boolean
4862 bfd_mach_o_set_arch_mach (bfd *abfd,
4863 enum bfd_architecture arch,
4864 unsigned long machine)
4865 {
4866 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
4867
4868 /* If this isn't the right architecture for this backend, and this
4869 isn't the generic backend, fail. */
4870 if (arch != bed->arch
4871 && arch != bfd_arch_unknown
4872 && bed->arch != bfd_arch_unknown)
4873 return FALSE;
4874
4875 return bfd_default_set_arch_mach (abfd, arch, machine);
4876 }
4877
4878 static bfd_boolean
4879 bfd_mach_o_scan (bfd *abfd,
4880 bfd_mach_o_header *header,
4881 bfd_mach_o_data_struct *mdata)
4882 {
4883 unsigned int i;
4884 enum bfd_architecture cputype;
4885 unsigned long cpusubtype;
4886 unsigned int hdrsize;
4887
4888 hdrsize = mach_o_wide_p (header) ?
4889 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
4890
4891 mdata->header = *header;
4892
4893 abfd->flags = abfd->flags & BFD_IN_MEMORY;
4894 switch (header->filetype)
4895 {
4896 case BFD_MACH_O_MH_OBJECT:
4897 abfd->flags |= HAS_RELOC;
4898 break;
4899 case BFD_MACH_O_MH_EXECUTE:
4900 abfd->flags |= EXEC_P;
4901 break;
4902 case BFD_MACH_O_MH_DYLIB:
4903 case BFD_MACH_O_MH_BUNDLE:
4904 abfd->flags |= DYNAMIC;
4905 break;
4906 }
4907
4908 abfd->tdata.mach_o_data = mdata;
4909
4910 bfd_mach_o_convert_architecture (header->cputype, header->cpusubtype,
4911 &cputype, &cpusubtype);
4912 if (cputype == bfd_arch_unknown)
4913 {
4914 (*_bfd_error_handler)
4915 (_("bfd_mach_o_scan: unknown architecture 0x%lx/0x%lx"),
4916 header->cputype, header->cpusubtype);
4917 return FALSE;
4918 }
4919
4920 bfd_set_arch_mach (abfd, cputype, cpusubtype);
4921
4922 if (header->ncmds != 0)
4923 {
4924 bfd_mach_o_load_command *cmd;
4925
4926 mdata->first_command = NULL;
4927 mdata->last_command = NULL;
4928
4929 cmd = bfd_alloc2 (abfd, header->ncmds, sizeof (bfd_mach_o_load_command));
4930 if (cmd == NULL)
4931 return FALSE;
4932
4933 for (i = 0; i < header->ncmds; i++)
4934 {
4935 bfd_mach_o_load_command *cur = &cmd[i];
4936
4937 bfd_mach_o_append_command (abfd, cur);
4938
4939 if (i == 0)
4940 cur->offset = hdrsize;
4941 else
4942 {
4943 bfd_mach_o_load_command *prev = &cmd[i - 1];
4944 cur->offset = prev->offset + prev->len;
4945 }
4946
4947 if (!bfd_mach_o_read_command (abfd, cur))
4948 return FALSE;
4949 }
4950 }
4951
4952 /* Sections should be flatten before scanning start address. */
4953 bfd_mach_o_flatten_sections (abfd);
4954 if (!bfd_mach_o_scan_start_address (abfd))
4955 return FALSE;
4956
4957 return TRUE;
4958 }
4959
4960 bfd_boolean
4961 bfd_mach_o_mkobject_init (bfd *abfd)
4962 {
4963 bfd_mach_o_data_struct *mdata = NULL;
4964
4965 mdata = bfd_zalloc (abfd, sizeof (bfd_mach_o_data_struct));
4966 if (mdata == NULL)
4967 return FALSE;
4968 abfd->tdata.mach_o_data = mdata;
4969
4970 mdata->header.magic = 0;
4971 mdata->header.cputype = 0;
4972 mdata->header.cpusubtype = 0;
4973 mdata->header.filetype = 0;
4974 mdata->header.ncmds = 0;
4975 mdata->header.sizeofcmds = 0;
4976 mdata->header.flags = 0;
4977 mdata->header.byteorder = BFD_ENDIAN_UNKNOWN;
4978 mdata->first_command = NULL;
4979 mdata->last_command = NULL;
4980 mdata->nsects = 0;
4981 mdata->sections = NULL;
4982 mdata->dyn_reloc_cache = NULL;
4983
4984 return TRUE;
4985 }
4986
4987 static bfd_boolean
4988 bfd_mach_o_gen_mkobject (bfd *abfd)
4989 {
4990 bfd_mach_o_data_struct *mdata;
4991
4992 if (!bfd_mach_o_mkobject_init (abfd))
4993 return FALSE;
4994
4995 mdata = bfd_mach_o_get_data (abfd);
4996 mdata->header.magic = BFD_MACH_O_MH_MAGIC;
4997 mdata->header.cputype = 0;
4998 mdata->header.cpusubtype = 0;
4999 mdata->header.byteorder = abfd->xvec->byteorder;
5000 mdata->header.version = 1;
5001
5002 return TRUE;
5003 }
5004
5005 const bfd_target *
5006 bfd_mach_o_header_p (bfd *abfd,
5007 file_ptr hdr_off,
5008 bfd_mach_o_filetype filetype,
5009 bfd_mach_o_cpu_type cputype)
5010 {
5011 bfd_mach_o_header header;
5012 bfd_mach_o_data_struct *mdata;
5013
5014 if (!bfd_mach_o_read_header (abfd, hdr_off, &header))
5015 goto wrong;
5016
5017 if (! (header.byteorder == BFD_ENDIAN_BIG
5018 || header.byteorder == BFD_ENDIAN_LITTLE))
5019 {
5020 (*_bfd_error_handler) (_("unknown header byte-order value 0x%lx"),
5021 (unsigned long) header.byteorder);
5022 goto wrong;
5023 }
5024
5025 if (! ((header.byteorder == BFD_ENDIAN_BIG
5026 && abfd->xvec->byteorder == BFD_ENDIAN_BIG
5027 && abfd->xvec->header_byteorder == BFD_ENDIAN_BIG)
5028 || (header.byteorder == BFD_ENDIAN_LITTLE
5029 && abfd->xvec->byteorder == BFD_ENDIAN_LITTLE
5030 && abfd->xvec->header_byteorder == BFD_ENDIAN_LITTLE)))
5031 goto wrong;
5032
5033 /* Check cputype and filetype.
5034 In case of wildcard, do not accept magics that are handled by existing
5035 targets. */
5036 if (cputype)
5037 {
5038 if (header.cputype != cputype)
5039 goto wrong;
5040 }
5041 else
5042 {
5043 #ifndef BFD64
5044 /* Do not recognize 64 architectures if not configured for 64bit targets.
5045 This could happen only for generic targets. */
5046 if (mach_o_wide_p (&header))
5047 goto wrong;
5048 #endif
5049 }
5050
5051 if (filetype)
5052 {
5053 if (header.filetype != filetype)
5054 goto wrong;
5055 }
5056 else
5057 {
5058 switch (header.filetype)
5059 {
5060 case BFD_MACH_O_MH_CORE:
5061 /* Handled by core_p */
5062 goto wrong;
5063 default:
5064 break;
5065 }
5066 }
5067
5068 mdata = (bfd_mach_o_data_struct *) bfd_zalloc (abfd, sizeof (*mdata));
5069 if (mdata == NULL)
5070 goto fail;
5071 mdata->hdr_offset = hdr_off;
5072
5073 if (!bfd_mach_o_scan (abfd, &header, mdata))
5074 goto wrong;
5075
5076 return abfd->xvec;
5077
5078 wrong:
5079 bfd_set_error (bfd_error_wrong_format);
5080
5081 fail:
5082 return NULL;
5083 }
5084
5085 static const bfd_target *
5086 bfd_mach_o_gen_object_p (bfd *abfd)
5087 {
5088 return bfd_mach_o_header_p (abfd, 0, 0, 0);
5089 }
5090
5091 static const bfd_target *
5092 bfd_mach_o_gen_core_p (bfd *abfd)
5093 {
5094 return bfd_mach_o_header_p (abfd, 0, BFD_MACH_O_MH_CORE, 0);
5095 }
5096
5097 /* Return the base address of ABFD, ie the address at which the image is
5098 mapped. The possible initial pagezero is ignored. */
5099
5100 bfd_vma
5101 bfd_mach_o_get_base_address (bfd *abfd)
5102 {
5103 bfd_mach_o_data_struct *mdata;
5104 bfd_mach_o_load_command *cmd;
5105
5106 /* Check for Mach-O. */
5107 if (!bfd_mach_o_valid (abfd))
5108 return 0;
5109 mdata = bfd_mach_o_get_data (abfd);
5110
5111 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5112 {
5113 if ((cmd->type == BFD_MACH_O_LC_SEGMENT
5114 || cmd->type == BFD_MACH_O_LC_SEGMENT_64))
5115 {
5116 struct bfd_mach_o_segment_command *segcmd = &cmd->command.segment;
5117
5118 if (segcmd->initprot != 0)
5119 return segcmd->vmaddr;
5120 }
5121 }
5122 return 0;
5123 }
5124
5125 typedef struct mach_o_fat_archentry
5126 {
5127 unsigned long cputype;
5128 unsigned long cpusubtype;
5129 unsigned long offset;
5130 unsigned long size;
5131 unsigned long align;
5132 } mach_o_fat_archentry;
5133
5134 typedef struct mach_o_fat_data_struct
5135 {
5136 unsigned long magic;
5137 unsigned long nfat_arch;
5138 mach_o_fat_archentry *archentries;
5139 } mach_o_fat_data_struct;
5140
5141 const bfd_target *
5142 bfd_mach_o_fat_archive_p (bfd *abfd)
5143 {
5144 mach_o_fat_data_struct *adata = NULL;
5145 struct mach_o_fat_header_external hdr;
5146 unsigned long i;
5147
5148 if (bfd_seek (abfd, 0, SEEK_SET) != 0
5149 || bfd_bread (&hdr, sizeof (hdr), abfd) != sizeof (hdr))
5150 goto error;
5151
5152 adata = bfd_alloc (abfd, sizeof (mach_o_fat_data_struct));
5153 if (adata == NULL)
5154 goto error;
5155
5156 adata->magic = bfd_getb32 (hdr.magic);
5157 adata->nfat_arch = bfd_getb32 (hdr.nfat_arch);
5158 if (adata->magic != 0xcafebabe)
5159 goto error;
5160 /* Avoid matching Java bytecode files, which have the same magic number.
5161 In the Java bytecode file format this field contains the JVM version,
5162 which starts at 43.0. */
5163 if (adata->nfat_arch > 30)
5164 goto error;
5165
5166 adata->archentries =
5167 bfd_alloc2 (abfd, adata->nfat_arch, sizeof (mach_o_fat_archentry));
5168 if (adata->archentries == NULL)
5169 goto error;
5170
5171 for (i = 0; i < adata->nfat_arch; i++)
5172 {
5173 struct mach_o_fat_arch_external arch;
5174 if (bfd_bread (&arch, sizeof (arch), abfd) != sizeof (arch))
5175 goto error;
5176 adata->archentries[i].cputype = bfd_getb32 (arch.cputype);
5177 adata->archentries[i].cpusubtype = bfd_getb32 (arch.cpusubtype);
5178 adata->archentries[i].offset = bfd_getb32 (arch.offset);
5179 adata->archentries[i].size = bfd_getb32 (arch.size);
5180 adata->archentries[i].align = bfd_getb32 (arch.align);
5181 }
5182
5183 abfd->tdata.mach_o_fat_data = adata;
5184
5185 return abfd->xvec;
5186
5187 error:
5188 if (adata != NULL)
5189 bfd_release (abfd, adata);
5190 bfd_set_error (bfd_error_wrong_format);
5191 return NULL;
5192 }
5193
5194 /* Set the filename for a fat binary member ABFD, whose bfd architecture is
5195 ARCH_TYPE/ARCH_SUBTYPE and corresponding entry in header is ENTRY.
5196 Set arelt_data and origin fields too. */
5197
5198 static void
5199 bfd_mach_o_fat_member_init (bfd *abfd,
5200 enum bfd_architecture arch_type,
5201 unsigned long arch_subtype,
5202 mach_o_fat_archentry *entry)
5203 {
5204 struct areltdata *areltdata;
5205 /* Create the member filename. Use ARCH_NAME. */
5206 const bfd_arch_info_type *ap = bfd_lookup_arch (arch_type, arch_subtype);
5207
5208 if (ap)
5209 {
5210 /* Use the architecture name if known. */
5211 abfd->filename = xstrdup (ap->printable_name);
5212 }
5213 else
5214 {
5215 /* Forge a uniq id. */
5216 const size_t namelen = 2 + 8 + 1 + 2 + 8 + 1;
5217 char *name = xmalloc (namelen);
5218 snprintf (name, namelen, "0x%lx-0x%lx",
5219 entry->cputype, entry->cpusubtype);
5220 abfd->filename = name;
5221 }
5222
5223 areltdata = bfd_zmalloc (sizeof (struct areltdata));
5224 areltdata->parsed_size = entry->size;
5225 abfd->arelt_data = areltdata;
5226 abfd->iostream = NULL;
5227 abfd->origin = entry->offset;
5228 }
5229
5230 bfd *
5231 bfd_mach_o_fat_openr_next_archived_file (bfd *archive, bfd *prev)
5232 {
5233 mach_o_fat_data_struct *adata;
5234 mach_o_fat_archentry *entry = NULL;
5235 unsigned long i;
5236 bfd *nbfd;
5237 enum bfd_architecture arch_type;
5238 unsigned long arch_subtype;
5239
5240 adata = (mach_o_fat_data_struct *) archive->tdata.mach_o_fat_data;
5241 BFD_ASSERT (adata != NULL);
5242
5243 /* Find index of previous entry. */
5244 if (prev == NULL)
5245 {
5246 /* Start at first one. */
5247 i = 0;
5248 }
5249 else
5250 {
5251 /* Find index of PREV. */
5252 for (i = 0; i < adata->nfat_arch; i++)
5253 {
5254 if (adata->archentries[i].offset == prev->origin)
5255 break;
5256 }
5257
5258 if (i == adata->nfat_arch)
5259 {
5260 /* Not found. */
5261 bfd_set_error (bfd_error_bad_value);
5262 return NULL;
5263 }
5264
5265 /* Get next entry. */
5266 i++;
5267 }
5268
5269 if (i >= adata->nfat_arch)
5270 {
5271 bfd_set_error (bfd_error_no_more_archived_files);
5272 return NULL;
5273 }
5274
5275 entry = &adata->archentries[i];
5276 nbfd = _bfd_new_bfd_contained_in (archive);
5277 if (nbfd == NULL)
5278 return NULL;
5279
5280 bfd_mach_o_convert_architecture (entry->cputype, entry->cpusubtype,
5281 &arch_type, &arch_subtype);
5282
5283 bfd_mach_o_fat_member_init (nbfd, arch_type, arch_subtype, entry);
5284
5285 bfd_set_arch_mach (nbfd, arch_type, arch_subtype);
5286
5287 return nbfd;
5288 }
5289
5290 /* Analogous to stat call. */
5291
5292 static int
5293 bfd_mach_o_fat_stat_arch_elt (bfd *abfd, struct stat *buf)
5294 {
5295 if (abfd->arelt_data == NULL)
5296 {
5297 bfd_set_error (bfd_error_invalid_operation);
5298 return -1;
5299 }
5300
5301 buf->st_mtime = 0;
5302 buf->st_uid = 0;
5303 buf->st_gid = 0;
5304 buf->st_mode = 0644;
5305 buf->st_size = arelt_size (abfd);
5306
5307 return 0;
5308 }
5309
5310 /* If ABFD format is FORMAT and architecture is ARCH, return it.
5311 If ABFD is a fat image containing a member that corresponds to FORMAT
5312 and ARCH, returns it.
5313 In other case, returns NULL.
5314 This function allows transparent uses of fat images. */
5315
5316 bfd *
5317 bfd_mach_o_fat_extract (bfd *abfd,
5318 bfd_format format,
5319 const bfd_arch_info_type *arch)
5320 {
5321 bfd *res;
5322 mach_o_fat_data_struct *adata;
5323 unsigned int i;
5324
5325 if (bfd_check_format (abfd, format))
5326 {
5327 if (bfd_get_arch_info (abfd) == arch)
5328 return abfd;
5329 return NULL;
5330 }
5331 if (!bfd_check_format (abfd, bfd_archive)
5332 || abfd->xvec != &mach_o_fat_vec)
5333 return NULL;
5334
5335 /* This is a Mach-O fat image. */
5336 adata = (mach_o_fat_data_struct *) abfd->tdata.mach_o_fat_data;
5337 BFD_ASSERT (adata != NULL);
5338
5339 for (i = 0; i < adata->nfat_arch; i++)
5340 {
5341 struct mach_o_fat_archentry *e = &adata->archentries[i];
5342 enum bfd_architecture cpu_type;
5343 unsigned long cpu_subtype;
5344
5345 bfd_mach_o_convert_architecture (e->cputype, e->cpusubtype,
5346 &cpu_type, &cpu_subtype);
5347 if (cpu_type != arch->arch || cpu_subtype != arch->mach)
5348 continue;
5349
5350 /* The architecture is found. */
5351 res = _bfd_new_bfd_contained_in (abfd);
5352 if (res == NULL)
5353 return NULL;
5354
5355 bfd_mach_o_fat_member_init (res, cpu_type, cpu_subtype, e);
5356
5357 if (bfd_check_format (res, format))
5358 {
5359 BFD_ASSERT (bfd_get_arch_info (res) == arch);
5360 return res;
5361 }
5362 bfd_close (res);
5363 return NULL;
5364 }
5365
5366 return NULL;
5367 }
5368
5369 int
5370 bfd_mach_o_lookup_command (bfd *abfd,
5371 bfd_mach_o_load_command_type type,
5372 bfd_mach_o_load_command **mcommand)
5373 {
5374 struct mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5375 struct bfd_mach_o_load_command *cmd;
5376 unsigned int num;
5377
5378 BFD_ASSERT (mdata != NULL);
5379 BFD_ASSERT (mcommand != NULL);
5380
5381 num = 0;
5382 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5383 {
5384 if (cmd->type != type)
5385 continue;
5386
5387 if (num == 0)
5388 *mcommand = cmd;
5389 num++;
5390 }
5391
5392 return num;
5393 }
5394
5395 unsigned long
5396 bfd_mach_o_stack_addr (enum bfd_mach_o_cpu_type type)
5397 {
5398 switch (type)
5399 {
5400 case BFD_MACH_O_CPU_TYPE_MC680x0:
5401 return 0x04000000;
5402 case BFD_MACH_O_CPU_TYPE_MC88000:
5403 return 0xffffe000;
5404 case BFD_MACH_O_CPU_TYPE_POWERPC:
5405 return 0xc0000000;
5406 case BFD_MACH_O_CPU_TYPE_I386:
5407 return 0xc0000000;
5408 case BFD_MACH_O_CPU_TYPE_SPARC:
5409 return 0xf0000000;
5410 case BFD_MACH_O_CPU_TYPE_I860:
5411 return 0;
5412 case BFD_MACH_O_CPU_TYPE_HPPA:
5413 return 0xc0000000 - 0x04000000;
5414 default:
5415 return 0;
5416 }
5417 }
5418
5419 /* The following two tables should be kept, as far as possible, in order of
5420 most frequently used entries to optimize their use from gas. */
5421
5422 const bfd_mach_o_xlat_name bfd_mach_o_section_type_name[] =
5423 {
5424 { "regular", BFD_MACH_O_S_REGULAR},
5425 { "coalesced", BFD_MACH_O_S_COALESCED},
5426 { "zerofill", BFD_MACH_O_S_ZEROFILL},
5427 { "cstring_literals", BFD_MACH_O_S_CSTRING_LITERALS},
5428 { "4byte_literals", BFD_MACH_O_S_4BYTE_LITERALS},
5429 { "8byte_literals", BFD_MACH_O_S_8BYTE_LITERALS},
5430 { "16byte_literals", BFD_MACH_O_S_16BYTE_LITERALS},
5431 { "literal_pointers", BFD_MACH_O_S_LITERAL_POINTERS},
5432 { "mod_init_func_pointers", BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS},
5433 { "mod_fini_func_pointers", BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS},
5434 { "gb_zerofill", BFD_MACH_O_S_GB_ZEROFILL},
5435 { "interposing", BFD_MACH_O_S_INTERPOSING},
5436 { "dtrace_dof", BFD_MACH_O_S_DTRACE_DOF},
5437 { "non_lazy_symbol_pointers", BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS},
5438 { "lazy_symbol_pointers", BFD_MACH_O_S_LAZY_SYMBOL_POINTERS},
5439 { "symbol_stubs", BFD_MACH_O_S_SYMBOL_STUBS},
5440 { "lazy_dylib_symbol_pointers", BFD_MACH_O_S_LAZY_DYLIB_SYMBOL_POINTERS},
5441 { NULL, 0}
5442 };
5443
5444 const bfd_mach_o_xlat_name bfd_mach_o_section_attribute_name[] =
5445 {
5446 { "pure_instructions", BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS },
5447 { "some_instructions", BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS },
5448 { "loc_reloc", BFD_MACH_O_S_ATTR_LOC_RELOC },
5449 { "ext_reloc", BFD_MACH_O_S_ATTR_EXT_RELOC },
5450 { "debug", BFD_MACH_O_S_ATTR_DEBUG },
5451 { "live_support", BFD_MACH_O_S_ATTR_LIVE_SUPPORT },
5452 { "no_dead_strip", BFD_MACH_O_S_ATTR_NO_DEAD_STRIP },
5453 { "strip_static_syms", BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS },
5454 { "no_toc", BFD_MACH_O_S_ATTR_NO_TOC },
5455 { "self_modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
5456 { "modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
5457 { NULL, 0}
5458 };
5459
5460 /* Get the section type from NAME. Return 256 if NAME is unknown. */
5461
5462 unsigned int
5463 bfd_mach_o_get_section_type_from_name (bfd *abfd, const char *name)
5464 {
5465 const bfd_mach_o_xlat_name *x;
5466 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
5467
5468 for (x = bfd_mach_o_section_type_name; x->name; x++)
5469 if (strcmp (x->name, name) == 0)
5470 {
5471 /* We found it... does the target support it? */
5472 if (bed->bfd_mach_o_section_type_valid_for_target == NULL
5473 || bed->bfd_mach_o_section_type_valid_for_target (x->val))
5474 return x->val; /* OK. */
5475 else
5476 break; /* Not supported. */
5477 }
5478 /* Maximum section ID = 0xff. */
5479 return 256;
5480 }
5481
5482 /* Get the section attribute from NAME. Return -1 if NAME is unknown. */
5483
5484 unsigned int
5485 bfd_mach_o_get_section_attribute_from_name (const char *name)
5486 {
5487 const bfd_mach_o_xlat_name *x;
5488
5489 for (x = bfd_mach_o_section_attribute_name; x->name; x++)
5490 if (strcmp (x->name, name) == 0)
5491 return x->val;
5492 return (unsigned int)-1;
5493 }
5494
5495 int
5496 bfd_mach_o_core_fetch_environment (bfd *abfd,
5497 unsigned char **rbuf,
5498 unsigned int *rlen)
5499 {
5500 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5501 unsigned long stackaddr = bfd_mach_o_stack_addr (mdata->header.cputype);
5502 bfd_mach_o_load_command *cmd;
5503
5504 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5505 {
5506 bfd_mach_o_segment_command *seg;
5507
5508 if (cmd->type != BFD_MACH_O_LC_SEGMENT)
5509 continue;
5510
5511 seg = &cmd->command.segment;
5512
5513 if ((seg->vmaddr + seg->vmsize) == stackaddr)
5514 {
5515 unsigned long start = seg->fileoff;
5516 unsigned long end = seg->fileoff + seg->filesize;
5517 unsigned char *buf = bfd_malloc (1024);
5518 unsigned long size = 1024;
5519
5520 for (;;)
5521 {
5522 bfd_size_type nread = 0;
5523 unsigned long offset;
5524 int found_nonnull = 0;
5525
5526 if (size > (end - start))
5527 size = (end - start);
5528
5529 buf = bfd_realloc_or_free (buf, size);
5530 if (buf == NULL)
5531 return -1;
5532
5533 if (bfd_seek (abfd, end - size, SEEK_SET) != 0)
5534 {
5535 free (buf);
5536 return -1;
5537 }
5538
5539 nread = bfd_bread (buf, size, abfd);
5540
5541 if (nread != size)
5542 {
5543 free (buf);
5544 return -1;
5545 }
5546
5547 for (offset = 4; offset <= size; offset += 4)
5548 {
5549 unsigned long val;
5550
5551 val = *((unsigned long *) (buf + size - offset));
5552 if (! found_nonnull)
5553 {
5554 if (val != 0)
5555 found_nonnull = 1;
5556 }
5557 else if (val == 0x0)
5558 {
5559 unsigned long bottom;
5560 unsigned long top;
5561
5562 bottom = seg->fileoff + seg->filesize - offset;
5563 top = seg->fileoff + seg->filesize - 4;
5564 *rbuf = bfd_malloc (top - bottom);
5565 *rlen = top - bottom;
5566
5567 memcpy (*rbuf, buf + size - *rlen, *rlen);
5568 free (buf);
5569 return 0;
5570 }
5571 }
5572
5573 if (size == (end - start))
5574 break;
5575
5576 size *= 2;
5577 }
5578
5579 free (buf);
5580 }
5581 }
5582
5583 return -1;
5584 }
5585
5586 char *
5587 bfd_mach_o_core_file_failing_command (bfd *abfd)
5588 {
5589 unsigned char *buf = NULL;
5590 unsigned int len = 0;
5591 int ret;
5592
5593 ret = bfd_mach_o_core_fetch_environment (abfd, &buf, &len);
5594 if (ret < 0)
5595 return NULL;
5596
5597 return (char *) buf;
5598 }
5599
5600 int
5601 bfd_mach_o_core_file_failing_signal (bfd *abfd ATTRIBUTE_UNUSED)
5602 {
5603 return 0;
5604 }
5605
5606 static bfd_mach_o_uuid_command *
5607 bfd_mach_o_lookup_uuid_command (bfd *abfd)
5608 {
5609 bfd_mach_o_load_command *uuid_cmd;
5610 int ncmd = bfd_mach_o_lookup_command (abfd, BFD_MACH_O_LC_UUID, &uuid_cmd);
5611 if (ncmd != 1)
5612 return FALSE;
5613 return &uuid_cmd->command.uuid;
5614 }
5615
5616 /* Return true if ABFD is a dSYM file and its UUID matches UUID_CMD. */
5617
5618 static bfd_boolean
5619 bfd_mach_o_dsym_for_uuid_p (bfd *abfd, const bfd_mach_o_uuid_command *uuid_cmd)
5620 {
5621 bfd_mach_o_uuid_command *dsym_uuid_cmd;
5622
5623 BFD_ASSERT (abfd);
5624 BFD_ASSERT (uuid_cmd);
5625
5626 if (!bfd_check_format (abfd, bfd_object))
5627 return FALSE;
5628
5629 if (bfd_get_flavour (abfd) != bfd_target_mach_o_flavour
5630 || bfd_mach_o_get_data (abfd) == NULL
5631 || bfd_mach_o_get_data (abfd)->header.filetype != BFD_MACH_O_MH_DSYM)
5632 return FALSE;
5633
5634 dsym_uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd);
5635 if (dsym_uuid_cmd == NULL)
5636 return FALSE;
5637
5638 if (memcmp (uuid_cmd->uuid, dsym_uuid_cmd->uuid,
5639 sizeof (uuid_cmd->uuid)) != 0)
5640 return FALSE;
5641
5642 return TRUE;
5643 }
5644
5645 /* Find a BFD in DSYM_FILENAME which matches ARCH and UUID_CMD.
5646 The caller is responsible for closing the returned BFD object and
5647 its my_archive if the returned BFD is in a fat dSYM. */
5648
5649 static bfd *
5650 bfd_mach_o_find_dsym (const char *dsym_filename,
5651 const bfd_mach_o_uuid_command *uuid_cmd,
5652 const bfd_arch_info_type *arch)
5653 {
5654 bfd *base_dsym_bfd, *dsym_bfd;
5655
5656 BFD_ASSERT (uuid_cmd);
5657
5658 base_dsym_bfd = bfd_openr (dsym_filename, NULL);
5659 if (base_dsym_bfd == NULL)
5660 return NULL;
5661
5662 dsym_bfd = bfd_mach_o_fat_extract (base_dsym_bfd, bfd_object, arch);
5663 if (bfd_mach_o_dsym_for_uuid_p (dsym_bfd, uuid_cmd))
5664 return dsym_bfd;
5665
5666 bfd_close (dsym_bfd);
5667 if (base_dsym_bfd != dsym_bfd)
5668 bfd_close (base_dsym_bfd);
5669
5670 return NULL;
5671 }
5672
5673 /* Return a BFD created from a dSYM file for ABFD.
5674 The caller is responsible for closing the returned BFD object, its
5675 filename, and its my_archive if the returned BFD is in a fat dSYM. */
5676
5677 static bfd *
5678 bfd_mach_o_follow_dsym (bfd *abfd)
5679 {
5680 char *dsym_filename;
5681 bfd_mach_o_uuid_command *uuid_cmd;
5682 bfd *dsym_bfd, *base_bfd = abfd;
5683 const char *base_basename;
5684
5685 if (abfd == NULL || bfd_get_flavour (abfd) != bfd_target_mach_o_flavour)
5686 return NULL;
5687
5688 if (abfd->my_archive)
5689 base_bfd = abfd->my_archive;
5690 /* BFD may have been opened from a stream. */
5691 if (base_bfd->filename == NULL)
5692 {
5693 bfd_set_error (bfd_error_invalid_operation);
5694 return NULL;
5695 }
5696 base_basename = lbasename (base_bfd->filename);
5697
5698 uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd);
5699 if (uuid_cmd == NULL)
5700 return NULL;
5701
5702 /* TODO: We assume the DWARF file has the same as the binary's.
5703 It seems apple's GDB checks all files in the dSYM bundle directory.
5704 http://opensource.apple.com/source/gdb/gdb-1708/src/gdb/macosx/macosx-tdep.c
5705 */
5706 dsym_filename = (char *)bfd_malloc (strlen (base_bfd->filename)
5707 + strlen (dsym_subdir) + 1
5708 + strlen (base_basename) + 1);
5709 sprintf (dsym_filename, "%s%s/%s",
5710 base_bfd->filename, dsym_subdir, base_basename);
5711
5712 dsym_bfd = bfd_mach_o_find_dsym (dsym_filename, uuid_cmd,
5713 bfd_get_arch_info (abfd));
5714 if (dsym_bfd == NULL)
5715 free (dsym_filename);
5716
5717 return dsym_bfd;
5718 }
5719
5720 bfd_boolean
5721 bfd_mach_o_find_nearest_line (bfd *abfd,
5722 asymbol **symbols,
5723 asection *section,
5724 bfd_vma offset,
5725 const char **filename_ptr,
5726 const char **functionname_ptr,
5727 unsigned int *line_ptr,
5728 unsigned int *discriminator_ptr)
5729 {
5730 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5731 if (mdata == NULL)
5732 return FALSE;
5733 switch (mdata->header.filetype)
5734 {
5735 case BFD_MACH_O_MH_OBJECT:
5736 break;
5737 case BFD_MACH_O_MH_EXECUTE:
5738 case BFD_MACH_O_MH_DYLIB:
5739 case BFD_MACH_O_MH_BUNDLE:
5740 case BFD_MACH_O_MH_KEXT_BUNDLE:
5741 if (mdata->dwarf2_find_line_info == NULL)
5742 {
5743 mdata->dsym_bfd = bfd_mach_o_follow_dsym (abfd);
5744 /* When we couldn't find dSYM for this binary, we look for
5745 the debug information in the binary itself. In this way,
5746 we won't try finding separated dSYM again because
5747 mdata->dwarf2_find_line_info will be filled. */
5748 if (! mdata->dsym_bfd)
5749 break;
5750 if (! _bfd_dwarf2_slurp_debug_info (abfd, mdata->dsym_bfd,
5751 dwarf_debug_sections, symbols,
5752 &mdata->dwarf2_find_line_info,
5753 FALSE))
5754 return FALSE;
5755 }
5756 break;
5757 default:
5758 return FALSE;
5759 }
5760 return _bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset,
5761 filename_ptr, functionname_ptr,
5762 line_ptr, discriminator_ptr,
5763 dwarf_debug_sections, 0,
5764 &mdata->dwarf2_find_line_info);
5765 }
5766
5767 bfd_boolean
5768 bfd_mach_o_close_and_cleanup (bfd *abfd)
5769 {
5770 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5771 if (bfd_get_format (abfd) == bfd_object && mdata != NULL)
5772 {
5773 _bfd_dwarf2_cleanup_debug_info (abfd, &mdata->dwarf2_find_line_info);
5774 bfd_mach_o_free_cached_info (abfd);
5775 if (mdata->dsym_bfd != NULL)
5776 {
5777 bfd *fat_bfd = mdata->dsym_bfd->my_archive;
5778 char *dsym_filename = (char *)(fat_bfd
5779 ? fat_bfd->filename
5780 : mdata->dsym_bfd->filename);
5781 bfd_close (mdata->dsym_bfd);
5782 mdata->dsym_bfd = NULL;
5783 if (fat_bfd)
5784 bfd_close (fat_bfd);
5785 free (dsym_filename);
5786 }
5787 }
5788
5789 return _bfd_generic_close_and_cleanup (abfd);
5790 }
5791
5792 bfd_boolean bfd_mach_o_free_cached_info (bfd *abfd)
5793 {
5794 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5795 asection *asect;
5796 free (mdata->dyn_reloc_cache);
5797 mdata->dyn_reloc_cache = NULL;
5798 for (asect = abfd->sections; asect != NULL; asect = asect->next)
5799 {
5800 free (asect->relocation);
5801 asect->relocation = NULL;
5802 }
5803
5804 return TRUE;
5805 }
5806
5807 #define bfd_mach_o_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
5808 #define bfd_mach_o_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_lookup
5809
5810 #define bfd_mach_o_swap_reloc_in NULL
5811 #define bfd_mach_o_swap_reloc_out NULL
5812 #define bfd_mach_o_print_thread NULL
5813 #define bfd_mach_o_tgt_seg_table NULL
5814 #define bfd_mach_o_section_type_valid_for_tgt NULL
5815
5816 #define TARGET_NAME mach_o_be_vec
5817 #define TARGET_STRING "mach-o-be"
5818 #define TARGET_ARCHITECTURE bfd_arch_unknown
5819 #define TARGET_PAGESIZE 1
5820 #define TARGET_BIG_ENDIAN 1
5821 #define TARGET_ARCHIVE 0
5822 #define TARGET_PRIORITY 1
5823 #include "mach-o-target.c"
5824
5825 #undef TARGET_NAME
5826 #undef TARGET_STRING
5827 #undef TARGET_ARCHITECTURE
5828 #undef TARGET_PAGESIZE
5829 #undef TARGET_BIG_ENDIAN
5830 #undef TARGET_ARCHIVE
5831 #undef TARGET_PRIORITY
5832
5833 #define TARGET_NAME mach_o_le_vec
5834 #define TARGET_STRING "mach-o-le"
5835 #define TARGET_ARCHITECTURE bfd_arch_unknown
5836 #define TARGET_PAGESIZE 1
5837 #define TARGET_BIG_ENDIAN 0
5838 #define TARGET_ARCHIVE 0
5839 #define TARGET_PRIORITY 1
5840
5841 #include "mach-o-target.c"
5842
5843 #undef TARGET_NAME
5844 #undef TARGET_STRING
5845 #undef TARGET_ARCHITECTURE
5846 #undef TARGET_PAGESIZE
5847 #undef TARGET_BIG_ENDIAN
5848 #undef TARGET_ARCHIVE
5849 #undef TARGET_PRIORITY
5850
5851 /* Not yet handled: creating an archive. */
5852 #define bfd_mach_o_mkarchive _bfd_noarchive_mkarchive
5853
5854 #define bfd_mach_o_close_and_cleanup bfd_true
5855
5856 /* Not used. */
5857 #define bfd_mach_o_generic_stat_arch_elt bfd_mach_o_fat_stat_arch_elt
5858 #define bfd_mach_o_openr_next_archived_file bfd_mach_o_fat_openr_next_archived_file
5859 #define bfd_mach_o_archive_p bfd_mach_o_fat_archive_p
5860
5861 #define TARGET_NAME mach_o_fat_vec
5862 #define TARGET_STRING "mach-o-fat"
5863 #define TARGET_ARCHITECTURE bfd_arch_unknown
5864 #define TARGET_PAGESIZE 1
5865 #define TARGET_BIG_ENDIAN 1
5866 #define TARGET_ARCHIVE 1
5867 #define TARGET_PRIORITY 0
5868
5869 #include "mach-o-target.c"
5870
5871 #undef TARGET_NAME
5872 #undef TARGET_STRING
5873 #undef TARGET_ARCHITECTURE
5874 #undef TARGET_PAGESIZE
5875 #undef TARGET_BIG_ENDIAN
5876 #undef TARGET_ARCHIVE
5877 #undef TARGET_PRIORITY
GDB Binutils - Deliverables
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