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NDS32/bfd: Add one more argument to control contents cache.
[deliverable/binutils-gdb.git] / bfd / mach-o.c
1 /* Mach-O support for BFD.
2 Copyright (C) 1999-2015 Free Software Foundation, Inc.
3
4 This file is part of BFD, the Binary File Descriptor library.
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
20
21 #include "sysdep.h"
22 #include "mach-o.h"
23 #include "bfd.h"
24 #include "libbfd.h"
25 #include "libiberty.h"
26 #include "aout/stab_gnu.h"
27 #include "mach-o/reloc.h"
28 #include "mach-o/external.h"
29 #include <ctype.h>
30 #include <stdlib.h>
31 #include <string.h>
32
33 #define bfd_mach_o_object_p bfd_mach_o_gen_object_p
34 #define bfd_mach_o_core_p bfd_mach_o_gen_core_p
35 #define bfd_mach_o_mkobject bfd_mach_o_gen_mkobject
36
37 #define FILE_ALIGN(off, algn) \
38 (((off) + ((file_ptr) 1 << (algn)) - 1) & ((file_ptr) -1 << (algn)))
39
40 static bfd_boolean
41 bfd_mach_o_read_dyld_content (bfd *abfd, bfd_mach_o_dyld_info_command *cmd);
42
43 unsigned int
44 bfd_mach_o_version (bfd *abfd)
45 {
46 bfd_mach_o_data_struct *mdata = NULL;
47
48 BFD_ASSERT (bfd_mach_o_valid (abfd));
49 mdata = bfd_mach_o_get_data (abfd);
50
51 return mdata->header.version;
52 }
53
54 bfd_boolean
55 bfd_mach_o_valid (bfd *abfd)
56 {
57 if (abfd == NULL || abfd->xvec == NULL)
58 return FALSE;
59
60 if (abfd->xvec->flavour != bfd_target_mach_o_flavour)
61 return FALSE;
62
63 if (bfd_mach_o_get_data (abfd) == NULL)
64 return FALSE;
65 return TRUE;
66 }
67
68 static INLINE bfd_boolean
69 mach_o_wide_p (bfd_mach_o_header *header)
70 {
71 switch (header->version)
72 {
73 case 1:
74 return FALSE;
75 case 2:
76 return TRUE;
77 default:
78 BFD_FAIL ();
79 return FALSE;
80 }
81 }
82
83 static INLINE bfd_boolean
84 bfd_mach_o_wide_p (bfd *abfd)
85 {
86 return mach_o_wide_p (&bfd_mach_o_get_data (abfd)->header);
87 }
88
89 /* Tables to translate well known Mach-O segment/section names to bfd
90 names. Use of canonical names (such as .text or .debug_frame) is required
91 by gdb. */
92
93 /* __TEXT Segment. */
94 static const mach_o_section_name_xlat text_section_names_xlat[] =
95 {
96 { ".text", "__text",
97 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR,
98 BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS, 0},
99 { ".const", "__const",
100 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
101 BFD_MACH_O_S_ATTR_NONE, 0},
102 { ".static_const", "__static_const",
103 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
104 BFD_MACH_O_S_ATTR_NONE, 0},
105 { ".cstring", "__cstring",
106 SEC_READONLY | SEC_DATA | SEC_LOAD | SEC_MERGE | SEC_STRINGS,
107 BFD_MACH_O_S_CSTRING_LITERALS,
108 BFD_MACH_O_S_ATTR_NONE, 0},
109 { ".literal4", "__literal4",
110 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_4BYTE_LITERALS,
111 BFD_MACH_O_S_ATTR_NONE, 2},
112 { ".literal8", "__literal8",
113 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_8BYTE_LITERALS,
114 BFD_MACH_O_S_ATTR_NONE, 3},
115 { ".literal16", "__literal16",
116 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_16BYTE_LITERALS,
117 BFD_MACH_O_S_ATTR_NONE, 4},
118 { ".constructor", "__constructor",
119 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR,
120 BFD_MACH_O_S_ATTR_NONE, 0},
121 { ".destructor", "__destructor",
122 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR,
123 BFD_MACH_O_S_ATTR_NONE, 0},
124 { ".eh_frame", "__eh_frame",
125 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_COALESCED,
126 BFD_MACH_O_S_ATTR_LIVE_SUPPORT
127 | BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS
128 | BFD_MACH_O_S_ATTR_NO_TOC, 2},
129 { NULL, NULL, 0, 0, 0, 0}
130 };
131
132 /* __DATA Segment. */
133 static const mach_o_section_name_xlat data_section_names_xlat[] =
134 {
135 { ".data", "__data",
136 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
137 BFD_MACH_O_S_ATTR_NONE, 0},
138 { ".bss", "__bss",
139 SEC_NO_FLAGS, BFD_MACH_O_S_ZEROFILL,
140 BFD_MACH_O_S_ATTR_NONE, 0},
141 { ".const_data", "__const",
142 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
143 BFD_MACH_O_S_ATTR_NONE, 0},
144 { ".static_data", "__static_data",
145 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
146 BFD_MACH_O_S_ATTR_NONE, 0},
147 { ".mod_init_func", "__mod_init_func",
148 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS,
149 BFD_MACH_O_S_ATTR_NONE, 2},
150 { ".mod_term_func", "__mod_term_func",
151 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS,
152 BFD_MACH_O_S_ATTR_NONE, 2},
153 { ".dyld", "__dyld",
154 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
155 BFD_MACH_O_S_ATTR_NONE, 0},
156 { ".cfstring", "__cfstring",
157 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
158 BFD_MACH_O_S_ATTR_NONE, 2},
159 { NULL, NULL, 0, 0, 0, 0}
160 };
161
162 /* __DWARF Segment. */
163 static const mach_o_section_name_xlat dwarf_section_names_xlat[] =
164 {
165 { ".debug_frame", "__debug_frame",
166 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
167 BFD_MACH_O_S_ATTR_DEBUG, 0},
168 { ".debug_info", "__debug_info",
169 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
170 BFD_MACH_O_S_ATTR_DEBUG, 0},
171 { ".debug_abbrev", "__debug_abbrev",
172 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
173 BFD_MACH_O_S_ATTR_DEBUG, 0},
174 { ".debug_aranges", "__debug_aranges",
175 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
176 BFD_MACH_O_S_ATTR_DEBUG, 0},
177 { ".debug_macinfo", "__debug_macinfo",
178 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
179 BFD_MACH_O_S_ATTR_DEBUG, 0},
180 { ".debug_line", "__debug_line",
181 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
182 BFD_MACH_O_S_ATTR_DEBUG, 0},
183 { ".debug_loc", "__debug_loc",
184 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
185 BFD_MACH_O_S_ATTR_DEBUG, 0},
186 { ".debug_pubnames", "__debug_pubnames",
187 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
188 BFD_MACH_O_S_ATTR_DEBUG, 0},
189 { ".debug_pubtypes", "__debug_pubtypes",
190 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
191 BFD_MACH_O_S_ATTR_DEBUG, 0},
192 { ".debug_str", "__debug_str",
193 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
194 BFD_MACH_O_S_ATTR_DEBUG, 0},
195 { ".debug_ranges", "__debug_ranges",
196 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
197 BFD_MACH_O_S_ATTR_DEBUG, 0},
198 { ".debug_macro", "__debug_macro",
199 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
200 BFD_MACH_O_S_ATTR_DEBUG, 0},
201 { ".debug_gdb_scripts", "__debug_gdb_scri",
202 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
203 BFD_MACH_O_S_ATTR_DEBUG, 0},
204 { NULL, NULL, 0, 0, 0, 0}
205 };
206
207 /* __OBJC Segment. */
208 static const mach_o_section_name_xlat objc_section_names_xlat[] =
209 {
210 { ".objc_class", "__class",
211 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
212 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
213 { ".objc_meta_class", "__meta_class",
214 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
215 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
216 { ".objc_cat_cls_meth", "__cat_cls_meth",
217 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
218 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
219 { ".objc_cat_inst_meth", "__cat_inst_meth",
220 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
221 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
222 { ".objc_protocol", "__protocol",
223 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
224 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
225 { ".objc_string_object", "__string_object",
226 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
227 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
228 { ".objc_cls_meth", "__cls_meth",
229 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
230 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
231 { ".objc_inst_meth", "__inst_meth",
232 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
233 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
234 { ".objc_cls_refs", "__cls_refs",
235 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LITERAL_POINTERS,
236 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
237 { ".objc_message_refs", "__message_refs",
238 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LITERAL_POINTERS,
239 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
240 { ".objc_symbols", "__symbols",
241 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
242 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
243 { ".objc_category", "__category",
244 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
245 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
246 { ".objc_class_vars", "__class_vars",
247 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
248 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
249 { ".objc_instance_vars", "__instance_vars",
250 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
251 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
252 { ".objc_module_info", "__module_info",
253 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
254 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
255 { ".objc_selector_strs", "__selector_strs",
256 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_CSTRING_LITERALS,
257 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
258 { ".objc_image_info", "__image_info",
259 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
260 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
261 { ".objc_selector_fixup", "__sel_fixup",
262 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
263 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
264 /* Objc V1 */
265 { ".objc1_class_ext", "__class_ext",
266 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
267 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
268 { ".objc1_property_list", "__property",
269 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
270 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
271 { ".objc1_protocol_ext", "__protocol_ext",
272 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
273 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
274 { NULL, NULL, 0, 0, 0, 0}
275 };
276
277 static const mach_o_segment_name_xlat segsec_names_xlat[] =
278 {
279 { "__TEXT", text_section_names_xlat },
280 { "__DATA", data_section_names_xlat },
281 { "__DWARF", dwarf_section_names_xlat },
282 { "__OBJC", objc_section_names_xlat },
283 { NULL, NULL }
284 };
285
286 static const char dsym_subdir[] = ".dSYM/Contents/Resources/DWARF";
287
288 /* For both cases bfd-name => mach-o name and vice versa, the specific target
289 is checked before the generic. This allows a target (e.g. ppc for cstring)
290 to override the generic definition with a more specific one. */
291
292 /* Fetch the translation from a Mach-O section designation (segment, section)
293 as a bfd short name, if one exists. Otherwise return NULL.
294
295 Allow the segment and section names to be unterminated 16 byte arrays. */
296
297 const mach_o_section_name_xlat *
298 bfd_mach_o_section_data_for_mach_sect (bfd *abfd, const char *segname,
299 const char *sectname)
300 {
301 const struct mach_o_segment_name_xlat *seg;
302 const mach_o_section_name_xlat *sec;
303 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
304
305 /* First try any target-specific translations defined... */
306 if (bed->segsec_names_xlat)
307 for (seg = bed->segsec_names_xlat; seg->segname; seg++)
308 if (strncmp (seg->segname, segname, BFD_MACH_O_SEGNAME_SIZE) == 0)
309 for (sec = seg->sections; sec->mach_o_name; sec++)
310 if (strncmp (sec->mach_o_name, sectname,
311 BFD_MACH_O_SECTNAME_SIZE) == 0)
312 return sec;
313
314 /* ... and then the Mach-O generic ones. */
315 for (seg = segsec_names_xlat; seg->segname; seg++)
316 if (strncmp (seg->segname, segname, BFD_MACH_O_SEGNAME_SIZE) == 0)
317 for (sec = seg->sections; sec->mach_o_name; sec++)
318 if (strncmp (sec->mach_o_name, sectname,
319 BFD_MACH_O_SECTNAME_SIZE) == 0)
320 return sec;
321
322 return NULL;
323 }
324
325 /* If the bfd_name for this section is a 'canonical' form for which we
326 know the Mach-O data, return the segment name and the data for the
327 Mach-O equivalent. Otherwise return NULL. */
328
329 const mach_o_section_name_xlat *
330 bfd_mach_o_section_data_for_bfd_name (bfd *abfd, const char *bfd_name,
331 const char **segname)
332 {
333 const struct mach_o_segment_name_xlat *seg;
334 const mach_o_section_name_xlat *sec;
335 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
336 *segname = NULL;
337
338 if (bfd_name[0] != '.')
339 return NULL;
340
341 /* First try any target-specific translations defined... */
342 if (bed->segsec_names_xlat)
343 for (seg = bed->segsec_names_xlat; seg->segname; seg++)
344 for (sec = seg->sections; sec->bfd_name; sec++)
345 if (strcmp (bfd_name, sec->bfd_name) == 0)
346 {
347 *segname = seg->segname;
348 return sec;
349 }
350
351 /* ... and then the Mach-O generic ones. */
352 for (seg = segsec_names_xlat; seg->segname; seg++)
353 for (sec = seg->sections; sec->bfd_name; sec++)
354 if (strcmp (bfd_name, sec->bfd_name) == 0)
355 {
356 *segname = seg->segname;
357 return sec;
358 }
359
360 return NULL;
361 }
362
363 /* Convert Mach-O section name to BFD.
364
365 Try to use standard/canonical names, for which we have tables including
366 default flag settings - which are returned. Otherwise forge a new name
367 in the form "<segmentname>.<sectionname>" this will be prefixed with
368 LC_SEGMENT. if the segment name does not begin with an underscore.
369
370 SEGNAME and SECTNAME are 16 byte arrays (they do not need to be NUL-
371 terminated if the name length is exactly 16 bytes - but must be if the name
372 length is less than 16 characters). */
373
374 void
375 bfd_mach_o_convert_section_name_to_bfd (bfd *abfd, const char *segname,
376 const char *secname, const char **name,
377 flagword *flags)
378 {
379 const mach_o_section_name_xlat *xlat;
380 char *res;
381 unsigned int len;
382 const char *pfx = "";
383
384 *name = NULL;
385 *flags = SEC_NO_FLAGS;
386
387 /* First search for a canonical name...
388 xlat will be non-null if there is an entry for segname, secname. */
389 xlat = bfd_mach_o_section_data_for_mach_sect (abfd, segname, secname);
390 if (xlat)
391 {
392 len = strlen (xlat->bfd_name);
393 res = bfd_alloc (abfd, len+1);
394 if (res == NULL)
395 return;
396 memcpy (res, xlat->bfd_name, len+1);
397 *name = res;
398 *flags = xlat->bfd_flags;
399 return;
400 }
401
402 /* ... else we make up a bfd name from the segment concatenated with the
403 section. */
404
405 len = 16 + 1 + 16 + 1;
406
407 /* Put "LC_SEGMENT." prefix if the segment name is weird (ie doesn't start
408 with an underscore. */
409 if (segname[0] != '_')
410 {
411 static const char seg_pfx[] = "LC_SEGMENT.";
412
413 pfx = seg_pfx;
414 len += sizeof (seg_pfx) - 1;
415 }
416
417 res = bfd_alloc (abfd, len);
418 if (res == NULL)
419 return;
420 snprintf (res, len, "%s%.16s.%.16s", pfx, segname, secname);
421 *name = res;
422 }
423
424 /* Convert a bfd section name to a Mach-O segment + section name.
425
426 If the name is a canonical one for which we have a Darwin match
427 return the translation table - which contains defaults for flags,
428 type, attribute and default alignment data.
429
430 Otherwise, expand the bfd_name (assumed to be in the form
431 "[LC_SEGMENT.]<segmentname>.<sectionname>") and return NULL. */
432
433 static const mach_o_section_name_xlat *
434 bfd_mach_o_convert_section_name_to_mach_o (bfd *abfd ATTRIBUTE_UNUSED,
435 asection *sect,
436 bfd_mach_o_section *section)
437 {
438 const mach_o_section_name_xlat *xlat;
439 const char *name = bfd_get_section_name (abfd, sect);
440 const char *segname;
441 const char *dot;
442 unsigned int len;
443 unsigned int seglen;
444 unsigned int seclen;
445
446 memset (section->segname, 0, BFD_MACH_O_SEGNAME_SIZE + 1);
447 memset (section->sectname, 0, BFD_MACH_O_SECTNAME_SIZE + 1);
448
449 /* See if is a canonical name ... */
450 xlat = bfd_mach_o_section_data_for_bfd_name (abfd, name, &segname);
451 if (xlat)
452 {
453 strcpy (section->segname, segname);
454 strcpy (section->sectname, xlat->mach_o_name);
455 return xlat;
456 }
457
458 /* .. else we convert our constructed one back to Mach-O.
459 Strip LC_SEGMENT. prefix, if present. */
460 if (strncmp (name, "LC_SEGMENT.", 11) == 0)
461 name += 11;
462
463 /* Find a dot. */
464 dot = strchr (name, '.');
465 len = strlen (name);
466
467 /* Try to split name into segment and section names. */
468 if (dot && dot != name)
469 {
470 seglen = dot - name;
471 seclen = len - (dot + 1 - name);
472
473 if (seglen <= BFD_MACH_O_SEGNAME_SIZE
474 && seclen <= BFD_MACH_O_SECTNAME_SIZE)
475 {
476 memcpy (section->segname, name, seglen);
477 section->segname[seglen] = 0;
478 memcpy (section->sectname, dot + 1, seclen);
479 section->sectname[seclen] = 0;
480 return NULL;
481 }
482 }
483
484 /* The segment and section names are both missing - don't make them
485 into dots. */
486 if (dot && dot == name)
487 return NULL;
488
489 /* Just duplicate the name into both segment and section. */
490 if (len > 16)
491 len = 16;
492 memcpy (section->segname, name, len);
493 section->segname[len] = 0;
494 memcpy (section->sectname, name, len);
495 section->sectname[len] = 0;
496 return NULL;
497 }
498
499 /* Return the size of an entry for section SEC.
500 Must be called only for symbol pointer section and symbol stubs
501 sections. */
502
503 unsigned int
504 bfd_mach_o_section_get_entry_size (bfd *abfd, bfd_mach_o_section *sec)
505 {
506 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
507 {
508 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
509 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
510 return bfd_mach_o_wide_p (abfd) ? 8 : 4;
511 case BFD_MACH_O_S_SYMBOL_STUBS:
512 return sec->reserved2;
513 default:
514 BFD_FAIL ();
515 return 0;
516 }
517 }
518
519 /* Return the number of indirect symbols for a section.
520 Must be called only for symbol pointer section and symbol stubs
521 sections. */
522
523 unsigned int
524 bfd_mach_o_section_get_nbr_indirect (bfd *abfd, bfd_mach_o_section *sec)
525 {
526 unsigned int elsz;
527
528 elsz = bfd_mach_o_section_get_entry_size (abfd, sec);
529 if (elsz == 0)
530 return 0;
531 else
532 return sec->size / elsz;
533 }
534
535 /* Append command CMD to ABFD. Note that header.ncmds is not updated. */
536
537 static void
538 bfd_mach_o_append_command (bfd *abfd, bfd_mach_o_load_command *cmd)
539 {
540 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
541
542 if (mdata->last_command != NULL)
543 mdata->last_command->next = cmd;
544 else
545 mdata->first_command = cmd;
546 mdata->last_command = cmd;
547 cmd->next = NULL;
548 }
549
550 /* Copy any private info we understand from the input symbol
551 to the output symbol. */
552
553 bfd_boolean
554 bfd_mach_o_bfd_copy_private_symbol_data (bfd *ibfd ATTRIBUTE_UNUSED,
555 asymbol *isymbol,
556 bfd *obfd ATTRIBUTE_UNUSED,
557 asymbol *osymbol)
558 {
559 bfd_mach_o_asymbol *os, *is;
560
561 os = (bfd_mach_o_asymbol *)osymbol;
562 is = (bfd_mach_o_asymbol *)isymbol;
563 os->n_type = is->n_type;
564 os->n_sect = is->n_sect;
565 os->n_desc = is->n_desc;
566 os->symbol.udata.i = is->symbol.udata.i;
567
568 return TRUE;
569 }
570
571 /* Copy any private info we understand from the input section
572 to the output section. */
573
574 bfd_boolean
575 bfd_mach_o_bfd_copy_private_section_data (bfd *ibfd, asection *isection,
576 bfd *obfd, asection *osection)
577 {
578 bfd_mach_o_section *os = bfd_mach_o_get_mach_o_section (osection);
579 bfd_mach_o_section *is = bfd_mach_o_get_mach_o_section (isection);
580
581 if (ibfd->xvec->flavour != bfd_target_mach_o_flavour
582 || obfd->xvec->flavour != bfd_target_mach_o_flavour)
583 return TRUE;
584
585 BFD_ASSERT (is != NULL && os != NULL);
586
587 os->flags = is->flags;
588 os->reserved1 = is->reserved1;
589 os->reserved2 = is->reserved2;
590 os->reserved3 = is->reserved3;
591
592 return TRUE;
593 }
594
595 /* Copy any private info we understand from the input bfd
596 to the output bfd. */
597
598 bfd_boolean
599 bfd_mach_o_bfd_copy_private_header_data (bfd *ibfd, bfd *obfd)
600 {
601 bfd_mach_o_data_struct *imdata;
602 bfd_mach_o_data_struct *omdata;
603 bfd_mach_o_load_command *icmd;
604
605 if (bfd_get_flavour (ibfd) != bfd_target_mach_o_flavour
606 || bfd_get_flavour (obfd) != bfd_target_mach_o_flavour)
607 return TRUE;
608
609 BFD_ASSERT (bfd_mach_o_valid (ibfd));
610 BFD_ASSERT (bfd_mach_o_valid (obfd));
611
612 imdata = bfd_mach_o_get_data (ibfd);
613 omdata = bfd_mach_o_get_data (obfd);
614
615 /* Copy header flags. */
616 omdata->header.flags = imdata->header.flags;
617
618 /* Copy commands. */
619 for (icmd = imdata->first_command; icmd != NULL; icmd = icmd->next)
620 {
621 bfd_mach_o_load_command *ocmd;
622
623 switch (icmd->type)
624 {
625 case BFD_MACH_O_LC_LOAD_DYLIB:
626 case BFD_MACH_O_LC_LOAD_DYLINKER:
627 case BFD_MACH_O_LC_DYLD_INFO:
628 /* Command is copied. */
629 ocmd = bfd_alloc (obfd, sizeof (bfd_mach_o_load_command));
630 if (ocmd == NULL)
631 return FALSE;
632
633 /* Copy common fields. */
634 ocmd->type = icmd->type;
635 ocmd->type_required = icmd->type_required;
636 ocmd->offset = 0;
637 ocmd->len = icmd->len;
638 break;
639
640 default:
641 /* Command is not copied. */
642 continue;
643 break;
644 }
645
646 switch (icmd->type)
647 {
648 case BFD_MACH_O_LC_LOAD_DYLIB:
649 {
650 bfd_mach_o_dylib_command *idy = &icmd->command.dylib;
651 bfd_mach_o_dylib_command *ody = &ocmd->command.dylib;
652
653 ody->name_offset = idy->name_offset;
654 ody->timestamp = idy->timestamp;
655 ody->current_version = idy->current_version;
656 ody->compatibility_version = idy->compatibility_version;
657 ody->name_str = idy->name_str;
658 }
659 break;
660
661 case BFD_MACH_O_LC_LOAD_DYLINKER:
662 {
663 bfd_mach_o_dylinker_command *idy = &icmd->command.dylinker;
664 bfd_mach_o_dylinker_command *ody = &ocmd->command.dylinker;
665
666 ody->name_offset = idy->name_offset;
667 ody->name_str = idy->name_str;
668 }
669 break;
670
671 case BFD_MACH_O_LC_DYLD_INFO:
672 {
673 bfd_mach_o_dyld_info_command *idy = &icmd->command.dyld_info;
674 bfd_mach_o_dyld_info_command *ody = &ocmd->command.dyld_info;
675
676 if (bfd_mach_o_read_dyld_content (ibfd, idy))
677 {
678 ody->rebase_size = idy->rebase_size;
679 ody->rebase_content = idy->rebase_content;
680
681 ody->bind_size = idy->bind_size;
682 ody->bind_content = idy->bind_content;
683
684 ody->weak_bind_size = idy->weak_bind_size;
685 ody->weak_bind_content = idy->weak_bind_content;
686
687 ody->lazy_bind_size = idy->lazy_bind_size;
688 ody->lazy_bind_content = idy->lazy_bind_content;
689
690 ody->export_size = idy->export_size;
691 ody->export_content = idy->export_content;
692 }
693 /* 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 (bfd_get_symcount (abfd) > 0 && num > bfd_get_symcount (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 native_relocs =
1461 (struct mach_o_reloc_info_external *) bfd_malloc (native_size);
1462 if (native_relocs == NULL)
1463 return -1;
1464
1465 if (bfd_seek (abfd, filepos, SEEK_SET) != 0
1466 || bfd_bread (native_relocs, native_size, abfd) != native_size)
1467 goto err;
1468
1469 for (i = 0; i < count; i++)
1470 {
1471 if (bfd_mach_o_canonicalize_one_reloc (abfd, &native_relocs[i],
1472 &res[i], syms) < 0)
1473 goto err;
1474 }
1475 free (native_relocs);
1476 return i;
1477 err:
1478 free (native_relocs);
1479 return -1;
1480 }
1481
1482 long
1483 bfd_mach_o_canonicalize_reloc (bfd *abfd, asection *asect,
1484 arelent **rels, asymbol **syms)
1485 {
1486 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1487 unsigned long i;
1488 arelent *res;
1489
1490 if (asect->reloc_count == 0)
1491 return 0;
1492
1493 /* No need to go further if we don't know how to read relocs. */
1494 if (bed->_bfd_mach_o_swap_reloc_in == NULL)
1495 return 0;
1496
1497 if (asect->relocation == NULL)
1498 {
1499 res = bfd_malloc (asect->reloc_count * sizeof (arelent));
1500 if (res == NULL)
1501 return -1;
1502
1503 if (bfd_mach_o_canonicalize_relocs (abfd, asect->rel_filepos,
1504 asect->reloc_count, res, syms) < 0)
1505 {
1506 free (res);
1507 return -1;
1508 }
1509 asect->relocation = res;
1510 }
1511
1512 res = asect->relocation;
1513 for (i = 0; i < asect->reloc_count; i++)
1514 rels[i] = &res[i];
1515 rels[i] = NULL;
1516
1517 return i;
1518 }
1519
1520 long
1521 bfd_mach_o_get_dynamic_reloc_upper_bound (bfd *abfd)
1522 {
1523 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1524
1525 if (mdata->dysymtab == NULL)
1526 return 1;
1527 return (mdata->dysymtab->nextrel + mdata->dysymtab->nlocrel + 1)
1528 * sizeof (arelent *);
1529 }
1530
1531 long
1532 bfd_mach_o_canonicalize_dynamic_reloc (bfd *abfd, arelent **rels,
1533 struct bfd_symbol **syms)
1534 {
1535 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1536 bfd_mach_o_dysymtab_command *dysymtab = mdata->dysymtab;
1537 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1538 unsigned long i;
1539 arelent *res;
1540
1541 if (dysymtab == NULL)
1542 return 0;
1543 if (dysymtab->nextrel == 0 && dysymtab->nlocrel == 0)
1544 return 0;
1545
1546 /* No need to go further if we don't know how to read relocs. */
1547 if (bed->_bfd_mach_o_swap_reloc_in == NULL)
1548 return 0;
1549
1550 if (mdata->dyn_reloc_cache == NULL)
1551 {
1552 res = bfd_malloc ((dysymtab->nextrel + dysymtab->nlocrel)
1553 * sizeof (arelent));
1554 if (res == NULL)
1555 return -1;
1556
1557 if (bfd_mach_o_canonicalize_relocs (abfd, dysymtab->extreloff,
1558 dysymtab->nextrel, res, syms) < 0)
1559 {
1560 free (res);
1561 return -1;
1562 }
1563
1564 if (bfd_mach_o_canonicalize_relocs (abfd, dysymtab->locreloff,
1565 dysymtab->nlocrel,
1566 res + dysymtab->nextrel, syms) < 0)
1567 {
1568 free (res);
1569 return -1;
1570 }
1571
1572 mdata->dyn_reloc_cache = res;
1573 }
1574
1575 res = mdata->dyn_reloc_cache;
1576 for (i = 0; i < dysymtab->nextrel + dysymtab->nlocrel; i++)
1577 rels[i] = &res[i];
1578 rels[i] = NULL;
1579 return i;
1580 }
1581
1582 /* In addition to the need to byte-swap the symbol number, the bit positions
1583 of the fields in the relocation information vary per target endian-ness. */
1584
1585 static void
1586 bfd_mach_o_swap_out_non_scattered_reloc (bfd *abfd, unsigned char *fields,
1587 bfd_mach_o_reloc_info *rel)
1588 {
1589 unsigned char info = 0;
1590
1591 BFD_ASSERT (rel->r_type <= 15);
1592 BFD_ASSERT (rel->r_length <= 3);
1593
1594 if (bfd_big_endian (abfd))
1595 {
1596 fields[0] = (rel->r_value >> 16) & 0xff;
1597 fields[1] = (rel->r_value >> 8) & 0xff;
1598 fields[2] = rel->r_value & 0xff;
1599 info |= rel->r_type << BFD_MACH_O_BE_TYPE_SHIFT;
1600 info |= rel->r_pcrel ? BFD_MACH_O_BE_PCREL : 0;
1601 info |= rel->r_length << BFD_MACH_O_BE_LENGTH_SHIFT;
1602 info |= rel->r_extern ? BFD_MACH_O_BE_EXTERN : 0;
1603 }
1604 else
1605 {
1606 fields[2] = (rel->r_value >> 16) & 0xff;
1607 fields[1] = (rel->r_value >> 8) & 0xff;
1608 fields[0] = rel->r_value & 0xff;
1609 info |= rel->r_type << BFD_MACH_O_LE_TYPE_SHIFT;
1610 info |= rel->r_pcrel ? BFD_MACH_O_LE_PCREL : 0;
1611 info |= rel->r_length << BFD_MACH_O_LE_LENGTH_SHIFT;
1612 info |= rel->r_extern ? BFD_MACH_O_LE_EXTERN : 0;
1613 }
1614 fields[3] = info;
1615 }
1616
1617 static bfd_boolean
1618 bfd_mach_o_write_relocs (bfd *abfd, bfd_mach_o_section *section)
1619 {
1620 unsigned int i;
1621 arelent **entries;
1622 asection *sec;
1623 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1624
1625 sec = section->bfdsection;
1626 if (sec->reloc_count == 0)
1627 return TRUE;
1628
1629 if (bed->_bfd_mach_o_swap_reloc_out == NULL)
1630 return TRUE;
1631
1632 if (bfd_seek (abfd, section->reloff, SEEK_SET) != 0)
1633 return FALSE;
1634
1635 /* Convert and write. */
1636 entries = section->bfdsection->orelocation;
1637 for (i = 0; i < section->nreloc; i++)
1638 {
1639 arelent *rel = entries[i];
1640 struct mach_o_reloc_info_external raw;
1641 bfd_mach_o_reloc_info info, *pinfo = &info;
1642
1643 /* Convert relocation to an intermediate representation. */
1644 if (!(*bed->_bfd_mach_o_swap_reloc_out) (rel, pinfo))
1645 return FALSE;
1646
1647 /* Lower the relocation info. */
1648 if (pinfo->r_scattered)
1649 {
1650 unsigned long v;
1651
1652 v = BFD_MACH_O_SR_SCATTERED
1653 | (pinfo->r_pcrel ? BFD_MACH_O_SR_PCREL : 0)
1654 | BFD_MACH_O_SET_SR_LENGTH (pinfo->r_length)
1655 | BFD_MACH_O_SET_SR_TYPE (pinfo->r_type)
1656 | BFD_MACH_O_SET_SR_ADDRESS (pinfo->r_address);
1657 /* Note: scattered relocs have field in reverse order... */
1658 bfd_put_32 (abfd, v, raw.r_address);
1659 bfd_put_32 (abfd, pinfo->r_value, raw.r_symbolnum);
1660 }
1661 else
1662 {
1663 bfd_put_32 (abfd, pinfo->r_address, raw.r_address);
1664 bfd_mach_o_swap_out_non_scattered_reloc (abfd, raw.r_symbolnum,
1665 pinfo);
1666 }
1667
1668 if (bfd_bwrite (&raw, BFD_MACH_O_RELENT_SIZE, abfd)
1669 != BFD_MACH_O_RELENT_SIZE)
1670 return FALSE;
1671 }
1672 return TRUE;
1673 }
1674
1675 static bfd_boolean
1676 bfd_mach_o_write_section_32 (bfd *abfd, bfd_mach_o_section *section)
1677 {
1678 struct mach_o_section_32_external raw;
1679
1680 memcpy (raw.sectname, section->sectname, 16);
1681 memcpy (raw.segname, section->segname, 16);
1682 bfd_h_put_32 (abfd, section->addr, raw.addr);
1683 bfd_h_put_32 (abfd, section->size, raw.size);
1684 bfd_h_put_32 (abfd, section->offset, raw.offset);
1685 bfd_h_put_32 (abfd, section->align, raw.align);
1686 bfd_h_put_32 (abfd, section->reloff, raw.reloff);
1687 bfd_h_put_32 (abfd, section->nreloc, raw.nreloc);
1688 bfd_h_put_32 (abfd, section->flags, raw.flags);
1689 bfd_h_put_32 (abfd, section->reserved1, raw.reserved1);
1690 bfd_h_put_32 (abfd, section->reserved2, raw.reserved2);
1691
1692 if (bfd_bwrite (&raw, BFD_MACH_O_SECTION_SIZE, abfd)
1693 != BFD_MACH_O_SECTION_SIZE)
1694 return FALSE;
1695
1696 return TRUE;
1697 }
1698
1699 static bfd_boolean
1700 bfd_mach_o_write_section_64 (bfd *abfd, bfd_mach_o_section *section)
1701 {
1702 struct mach_o_section_64_external raw;
1703
1704 memcpy (raw.sectname, section->sectname, 16);
1705 memcpy (raw.segname, section->segname, 16);
1706 bfd_h_put_64 (abfd, section->addr, raw.addr);
1707 bfd_h_put_64 (abfd, section->size, raw.size);
1708 bfd_h_put_32 (abfd, section->offset, raw.offset);
1709 bfd_h_put_32 (abfd, section->align, raw.align);
1710 bfd_h_put_32 (abfd, section->reloff, raw.reloff);
1711 bfd_h_put_32 (abfd, section->nreloc, raw.nreloc);
1712 bfd_h_put_32 (abfd, section->flags, raw.flags);
1713 bfd_h_put_32 (abfd, section->reserved1, raw.reserved1);
1714 bfd_h_put_32 (abfd, section->reserved2, raw.reserved2);
1715 bfd_h_put_32 (abfd, section->reserved3, raw.reserved3);
1716
1717 if (bfd_bwrite (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd)
1718 != BFD_MACH_O_SECTION_64_SIZE)
1719 return FALSE;
1720
1721 return TRUE;
1722 }
1723
1724 static bfd_boolean
1725 bfd_mach_o_write_segment_32 (bfd *abfd, bfd_mach_o_load_command *command)
1726 {
1727 struct mach_o_segment_command_32_external raw;
1728 bfd_mach_o_segment_command *seg = &command->command.segment;
1729 bfd_mach_o_section *sec;
1730
1731 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT);
1732
1733 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1734 if (!bfd_mach_o_write_relocs (abfd, sec))
1735 return FALSE;
1736
1737 memcpy (raw.segname, seg->segname, 16);
1738 bfd_h_put_32 (abfd, seg->vmaddr, raw.vmaddr);
1739 bfd_h_put_32 (abfd, seg->vmsize, raw.vmsize);
1740 bfd_h_put_32 (abfd, seg->fileoff, raw.fileoff);
1741 bfd_h_put_32 (abfd, seg->filesize, raw.filesize);
1742 bfd_h_put_32 (abfd, seg->maxprot, raw.maxprot);
1743 bfd_h_put_32 (abfd, seg->initprot, raw.initprot);
1744 bfd_h_put_32 (abfd, seg->nsects, raw.nsects);
1745 bfd_h_put_32 (abfd, seg->flags, raw.flags);
1746
1747 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1748 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1749 return FALSE;
1750
1751 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1752 if (!bfd_mach_o_write_section_32 (abfd, sec))
1753 return FALSE;
1754
1755 return TRUE;
1756 }
1757
1758 static bfd_boolean
1759 bfd_mach_o_write_segment_64 (bfd *abfd, bfd_mach_o_load_command *command)
1760 {
1761 struct mach_o_segment_command_64_external raw;
1762 bfd_mach_o_segment_command *seg = &command->command.segment;
1763 bfd_mach_o_section *sec;
1764
1765 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64);
1766
1767 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1768 if (!bfd_mach_o_write_relocs (abfd, sec))
1769 return FALSE;
1770
1771 memcpy (raw.segname, seg->segname, 16);
1772 bfd_h_put_64 (abfd, seg->vmaddr, raw.vmaddr);
1773 bfd_h_put_64 (abfd, seg->vmsize, raw.vmsize);
1774 bfd_h_put_64 (abfd, seg->fileoff, raw.fileoff);
1775 bfd_h_put_64 (abfd, seg->filesize, raw.filesize);
1776 bfd_h_put_32 (abfd, seg->maxprot, raw.maxprot);
1777 bfd_h_put_32 (abfd, seg->initprot, raw.initprot);
1778 bfd_h_put_32 (abfd, seg->nsects, raw.nsects);
1779 bfd_h_put_32 (abfd, seg->flags, raw.flags);
1780
1781 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1782 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1783 return FALSE;
1784
1785 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1786 if (!bfd_mach_o_write_section_64 (abfd, sec))
1787 return FALSE;
1788
1789 return TRUE;
1790 }
1791
1792 static bfd_boolean
1793 bfd_mach_o_write_symtab_content (bfd *abfd, bfd_mach_o_symtab_command *sym)
1794 {
1795 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1796 unsigned long i;
1797 unsigned int wide = bfd_mach_o_wide_p (abfd);
1798 struct bfd_strtab_hash *strtab;
1799 asymbol **symbols = bfd_get_outsymbols (abfd);
1800 int padlen;
1801
1802 /* Write the symbols first. */
1803 if (bfd_seek (abfd, sym->symoff, SEEK_SET) != 0)
1804 return FALSE;
1805
1806 strtab = _bfd_stringtab_init ();
1807 if (strtab == NULL)
1808 return FALSE;
1809
1810 if (sym->nsyms > 0)
1811 /* Although we don't strictly need to do this, for compatibility with
1812 Darwin system tools, actually output an empty string for the index
1813 0 entry. */
1814 _bfd_stringtab_add (strtab, "", TRUE, FALSE);
1815
1816 for (i = 0; i < sym->nsyms; i++)
1817 {
1818 bfd_size_type str_index;
1819 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
1820
1821 if (s->symbol.name == 0 || s->symbol.name[0] == '\0')
1822 /* An index of 0 always means the empty string. */
1823 str_index = 0;
1824 else
1825 {
1826 str_index = _bfd_stringtab_add (strtab, s->symbol.name, TRUE, FALSE);
1827
1828 if (str_index == (bfd_size_type) -1)
1829 goto err;
1830 }
1831
1832 if (wide)
1833 {
1834 struct mach_o_nlist_64_external raw;
1835
1836 bfd_h_put_32 (abfd, str_index, raw.n_strx);
1837 bfd_h_put_8 (abfd, s->n_type, raw.n_type);
1838 bfd_h_put_8 (abfd, s->n_sect, raw.n_sect);
1839 bfd_h_put_16 (abfd, s->n_desc, raw.n_desc);
1840 bfd_h_put_64 (abfd, s->symbol.section->vma + s->symbol.value,
1841 raw.n_value);
1842
1843 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1844 goto err;
1845 }
1846 else
1847 {
1848 struct mach_o_nlist_external raw;
1849
1850 bfd_h_put_32 (abfd, str_index, raw.n_strx);
1851 bfd_h_put_8 (abfd, s->n_type, raw.n_type);
1852 bfd_h_put_8 (abfd, s->n_sect, raw.n_sect);
1853 bfd_h_put_16 (abfd, s->n_desc, raw.n_desc);
1854 bfd_h_put_32 (abfd, s->symbol.section->vma + s->symbol.value,
1855 raw.n_value);
1856
1857 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1858 goto err;
1859 }
1860 }
1861 sym->strsize = _bfd_stringtab_size (strtab);
1862 sym->stroff = mdata->filelen;
1863 mdata->filelen += sym->strsize;
1864
1865 if (bfd_seek (abfd, sym->stroff, SEEK_SET) != 0)
1866 return FALSE;
1867
1868 if (_bfd_stringtab_emit (abfd, strtab) != TRUE)
1869 goto err;
1870 _bfd_stringtab_free (strtab);
1871
1872 /* Pad string table. */
1873 padlen = bfd_mach_o_pad4 (abfd, sym->strsize);
1874 if (padlen < 0)
1875 return FALSE;
1876 mdata->filelen += padlen;
1877 sym->strsize += padlen;
1878
1879 return TRUE;
1880
1881 err:
1882 _bfd_stringtab_free (strtab);
1883 return FALSE;
1884 }
1885
1886 static bfd_boolean
1887 bfd_mach_o_write_symtab (bfd *abfd, bfd_mach_o_load_command *command)
1888 {
1889 bfd_mach_o_symtab_command *sym = &command->command.symtab;
1890 struct mach_o_symtab_command_external raw;
1891
1892 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB);
1893
1894 /* The command. */
1895 bfd_h_put_32 (abfd, sym->symoff, raw.symoff);
1896 bfd_h_put_32 (abfd, sym->nsyms, raw.nsyms);
1897 bfd_h_put_32 (abfd, sym->stroff, raw.stroff);
1898 bfd_h_put_32 (abfd, sym->strsize, raw.strsize);
1899
1900 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1901 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1902 return FALSE;
1903
1904 return TRUE;
1905 }
1906
1907 /* Count the number of indirect symbols in the image.
1908 Requires that the sections are in their final order. */
1909
1910 static unsigned int
1911 bfd_mach_o_count_indirect_symbols (bfd *abfd, bfd_mach_o_data_struct *mdata)
1912 {
1913 unsigned int i;
1914 unsigned int nisyms = 0;
1915
1916 for (i = 0; i < mdata->nsects; ++i)
1917 {
1918 bfd_mach_o_section *sec = mdata->sections[i];
1919
1920 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
1921 {
1922 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
1923 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
1924 case BFD_MACH_O_S_SYMBOL_STUBS:
1925 nisyms += bfd_mach_o_section_get_nbr_indirect (abfd, sec);
1926 break;
1927 default:
1928 break;
1929 }
1930 }
1931 return nisyms;
1932 }
1933
1934 /* Create the dysymtab. */
1935
1936 static bfd_boolean
1937 bfd_mach_o_build_dysymtab (bfd *abfd, bfd_mach_o_dysymtab_command *cmd)
1938 {
1939 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1940
1941 /* TODO:
1942 We are not going to try and fill these in yet and, moreover, we are
1943 going to bail if they are already set. */
1944 if (cmd->nmodtab != 0
1945 || cmd->ntoc != 0
1946 || cmd->nextrefsyms != 0)
1947 {
1948 (*_bfd_error_handler) (_("sorry: modtab, toc and extrefsyms are not yet"
1949 " implemented for dysymtab commands."));
1950 return FALSE;
1951 }
1952
1953 cmd->ilocalsym = 0;
1954
1955 if (bfd_get_symcount (abfd) > 0)
1956 {
1957 asymbol **symbols = bfd_get_outsymbols (abfd);
1958 unsigned long i;
1959
1960 /* Count the number of each kind of symbol. */
1961 for (i = 0; i < bfd_get_symcount (abfd); ++i)
1962 {
1963 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
1964 if (s->n_type & (BFD_MACH_O_N_EXT | BFD_MACH_O_N_PEXT))
1965 break;
1966 }
1967 cmd->nlocalsym = i;
1968 cmd->iextdefsym = i;
1969 for (; i < bfd_get_symcount (abfd); ++i)
1970 {
1971 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
1972 if ((s->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_UNDF)
1973 break;
1974 }
1975 cmd->nextdefsym = i - cmd->nlocalsym;
1976 cmd->iundefsym = cmd->nextdefsym + cmd->iextdefsym;
1977 cmd->nundefsym = bfd_get_symcount (abfd)
1978 - cmd->nlocalsym
1979 - cmd->nextdefsym;
1980 }
1981 else
1982 {
1983 cmd->nlocalsym = 0;
1984 cmd->iextdefsym = 0;
1985 cmd->nextdefsym = 0;
1986 cmd->iundefsym = 0;
1987 cmd->nundefsym = 0;
1988 }
1989
1990 cmd->nindirectsyms = bfd_mach_o_count_indirect_symbols (abfd, mdata);
1991 if (cmd->nindirectsyms > 0)
1992 {
1993 unsigned i;
1994 unsigned n;
1995
1996 mdata->filelen = FILE_ALIGN (mdata->filelen, 2);
1997 cmd->indirectsymoff = mdata->filelen;
1998 mdata->filelen += cmd->nindirectsyms * 4;
1999
2000 cmd->indirect_syms = bfd_zalloc (abfd, cmd->nindirectsyms * 4);
2001 if (cmd->indirect_syms == NULL)
2002 return FALSE;
2003
2004 n = 0;
2005 for (i = 0; i < mdata->nsects; ++i)
2006 {
2007 bfd_mach_o_section *sec = mdata->sections[i];
2008
2009 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2010 {
2011 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
2012 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
2013 case BFD_MACH_O_S_SYMBOL_STUBS:
2014 {
2015 unsigned j, num;
2016 bfd_mach_o_asymbol **isyms = sec->indirect_syms;
2017
2018 num = bfd_mach_o_section_get_nbr_indirect (abfd, sec);
2019 if (isyms == NULL || num == 0)
2020 break;
2021 /* Record the starting index in the reserved1 field. */
2022 sec->reserved1 = n;
2023 for (j = 0; j < num; j++, n++)
2024 {
2025 if (isyms[j] == NULL)
2026 cmd->indirect_syms[n] = BFD_MACH_O_INDIRECT_SYM_LOCAL;
2027 else if (isyms[j]->symbol.section == bfd_abs_section_ptr
2028 && ! (isyms[j]->n_type & BFD_MACH_O_N_EXT))
2029 cmd->indirect_syms[n] = BFD_MACH_O_INDIRECT_SYM_LOCAL
2030 | BFD_MACH_O_INDIRECT_SYM_ABS;
2031 else
2032 cmd->indirect_syms[n] = isyms[j]->symbol.udata.i;
2033 }
2034 }
2035 break;
2036 default:
2037 break;
2038 }
2039 }
2040 }
2041
2042 return TRUE;
2043 }
2044
2045 /* Write a dysymtab command.
2046 TODO: Possibly coalesce writes of smaller objects. */
2047
2048 static bfd_boolean
2049 bfd_mach_o_write_dysymtab (bfd *abfd, bfd_mach_o_load_command *command)
2050 {
2051 bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab;
2052
2053 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB);
2054
2055 if (cmd->nmodtab != 0)
2056 {
2057 unsigned int i;
2058
2059 if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0)
2060 return FALSE;
2061
2062 for (i = 0; i < cmd->nmodtab; i++)
2063 {
2064 bfd_mach_o_dylib_module *module = &cmd->dylib_module[i];
2065 unsigned int iinit;
2066 unsigned int ninit;
2067
2068 iinit = module->iinit & 0xffff;
2069 iinit |= ((module->iterm & 0xffff) << 16);
2070
2071 ninit = module->ninit & 0xffff;
2072 ninit |= ((module->nterm & 0xffff) << 16);
2073
2074 if (bfd_mach_o_wide_p (abfd))
2075 {
2076 struct mach_o_dylib_module_64_external w;
2077
2078 bfd_h_put_32 (abfd, module->module_name_idx, &w.module_name);
2079 bfd_h_put_32 (abfd, module->iextdefsym, &w.iextdefsym);
2080 bfd_h_put_32 (abfd, module->nextdefsym, &w.nextdefsym);
2081 bfd_h_put_32 (abfd, module->irefsym, &w.irefsym);
2082 bfd_h_put_32 (abfd, module->nrefsym, &w.nrefsym);
2083 bfd_h_put_32 (abfd, module->ilocalsym, &w.ilocalsym);
2084 bfd_h_put_32 (abfd, module->nlocalsym, &w.nlocalsym);
2085 bfd_h_put_32 (abfd, module->iextrel, &w.iextrel);
2086 bfd_h_put_32 (abfd, module->nextrel, &w.nextrel);
2087 bfd_h_put_32 (abfd, iinit, &w.iinit_iterm);
2088 bfd_h_put_32 (abfd, ninit, &w.ninit_nterm);
2089 bfd_h_put_64 (abfd, module->objc_module_info_addr,
2090 &w.objc_module_info_addr);
2091 bfd_h_put_32 (abfd, module->objc_module_info_size,
2092 &w.objc_module_info_size);
2093
2094 if (bfd_bwrite ((void *) &w, sizeof (w), abfd) != sizeof (w))
2095 return FALSE;
2096 }
2097 else
2098 {
2099 struct mach_o_dylib_module_external n;
2100
2101 bfd_h_put_32 (abfd, module->module_name_idx, &n.module_name);
2102 bfd_h_put_32 (abfd, module->iextdefsym, &n.iextdefsym);
2103 bfd_h_put_32 (abfd, module->nextdefsym, &n.nextdefsym);
2104 bfd_h_put_32 (abfd, module->irefsym, &n.irefsym);
2105 bfd_h_put_32 (abfd, module->nrefsym, &n.nrefsym);
2106 bfd_h_put_32 (abfd, module->ilocalsym, &n.ilocalsym);
2107 bfd_h_put_32 (abfd, module->nlocalsym, &n.nlocalsym);
2108 bfd_h_put_32 (abfd, module->iextrel, &n.iextrel);
2109 bfd_h_put_32 (abfd, module->nextrel, &n.nextrel);
2110 bfd_h_put_32 (abfd, iinit, &n.iinit_iterm);
2111 bfd_h_put_32 (abfd, ninit, &n.ninit_nterm);
2112 bfd_h_put_32 (abfd, module->objc_module_info_addr,
2113 &n.objc_module_info_addr);
2114 bfd_h_put_32 (abfd, module->objc_module_info_size,
2115 &n.objc_module_info_size);
2116
2117 if (bfd_bwrite ((void *) &n, sizeof (n), abfd) != sizeof (n))
2118 return FALSE;
2119 }
2120 }
2121 }
2122
2123 if (cmd->ntoc != 0)
2124 {
2125 unsigned int i;
2126
2127 if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0)
2128 return FALSE;
2129
2130 for (i = 0; i < cmd->ntoc; i++)
2131 {
2132 struct mach_o_dylib_table_of_contents_external raw;
2133 bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i];
2134
2135 bfd_h_put_32 (abfd, toc->symbol_index, &raw.symbol_index);
2136 bfd_h_put_32 (abfd, toc->module_index, &raw.module_index);
2137
2138 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
2139 return FALSE;
2140 }
2141 }
2142
2143 if (cmd->nindirectsyms > 0)
2144 {
2145 unsigned int i;
2146
2147 if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0)
2148 return FALSE;
2149
2150 for (i = 0; i < cmd->nindirectsyms; ++i)
2151 {
2152 unsigned char raw[4];
2153
2154 bfd_h_put_32 (abfd, cmd->indirect_syms[i], &raw);
2155 if (bfd_bwrite (raw, sizeof (raw), abfd) != sizeof (raw))
2156 return FALSE;
2157 }
2158 }
2159
2160 if (cmd->nextrefsyms != 0)
2161 {
2162 unsigned int i;
2163
2164 if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0)
2165 return FALSE;
2166
2167 for (i = 0; i < cmd->nextrefsyms; i++)
2168 {
2169 unsigned long v;
2170 unsigned char raw[4];
2171 bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i];
2172
2173 /* Fields isym and flags are written as bit-fields, thus we need
2174 a specific processing for endianness. */
2175
2176 if (bfd_big_endian (abfd))
2177 {
2178 v = ((ref->isym & 0xffffff) << 8);
2179 v |= ref->flags & 0xff;
2180 }
2181 else
2182 {
2183 v = ref->isym & 0xffffff;
2184 v |= ((ref->flags & 0xff) << 24);
2185 }
2186
2187 bfd_h_put_32 (abfd, v, raw);
2188 if (bfd_bwrite (raw, sizeof (raw), abfd) != sizeof (raw))
2189 return FALSE;
2190 }
2191 }
2192
2193 /* The command. */
2194 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0)
2195 return FALSE;
2196 else
2197 {
2198 struct mach_o_dysymtab_command_external raw;
2199
2200 bfd_h_put_32 (abfd, cmd->ilocalsym, &raw.ilocalsym);
2201 bfd_h_put_32 (abfd, cmd->nlocalsym, &raw.nlocalsym);
2202 bfd_h_put_32 (abfd, cmd->iextdefsym, &raw.iextdefsym);
2203 bfd_h_put_32 (abfd, cmd->nextdefsym, &raw.nextdefsym);
2204 bfd_h_put_32 (abfd, cmd->iundefsym, &raw.iundefsym);
2205 bfd_h_put_32 (abfd, cmd->nundefsym, &raw.nundefsym);
2206 bfd_h_put_32 (abfd, cmd->tocoff, &raw.tocoff);
2207 bfd_h_put_32 (abfd, cmd->ntoc, &raw.ntoc);
2208 bfd_h_put_32 (abfd, cmd->modtaboff, &raw.modtaboff);
2209 bfd_h_put_32 (abfd, cmd->nmodtab, &raw.nmodtab);
2210 bfd_h_put_32 (abfd, cmd->extrefsymoff, &raw.extrefsymoff);
2211 bfd_h_put_32 (abfd, cmd->nextrefsyms, &raw.nextrefsyms);
2212 bfd_h_put_32 (abfd, cmd->indirectsymoff, &raw.indirectsymoff);
2213 bfd_h_put_32 (abfd, cmd->nindirectsyms, &raw.nindirectsyms);
2214 bfd_h_put_32 (abfd, cmd->extreloff, &raw.extreloff);
2215 bfd_h_put_32 (abfd, cmd->nextrel, &raw.nextrel);
2216 bfd_h_put_32 (abfd, cmd->locreloff, &raw.locreloff);
2217 bfd_h_put_32 (abfd, cmd->nlocrel, &raw.nlocrel);
2218
2219 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
2220 return FALSE;
2221 }
2222
2223 return TRUE;
2224 }
2225
2226 static unsigned
2227 bfd_mach_o_primary_symbol_sort_key (bfd_mach_o_asymbol *s)
2228 {
2229 unsigned mtyp = s->n_type & BFD_MACH_O_N_TYPE;
2230
2231 /* Just leave debug symbols where they are (pretend they are local, and
2232 then they will just be sorted on position). */
2233 if (s->n_type & BFD_MACH_O_N_STAB)
2234 return 0;
2235
2236 /* Local (we should never see an undefined local AFAICT). */
2237 if (! (s->n_type & (BFD_MACH_O_N_EXT | BFD_MACH_O_N_PEXT)))
2238 return 0;
2239
2240 /* Common symbols look like undefined externs. */
2241 if (mtyp == BFD_MACH_O_N_UNDF)
2242 return 2;
2243
2244 /* A defined non-local, non-debug symbol. */
2245 return 1;
2246 }
2247
2248 static int
2249 bfd_mach_o_cf_symbols (const void *a, const void *b)
2250 {
2251 bfd_mach_o_asymbol *sa = *(bfd_mach_o_asymbol **) a;
2252 bfd_mach_o_asymbol *sb = *(bfd_mach_o_asymbol **) b;
2253 unsigned int soa, sob;
2254
2255 soa = bfd_mach_o_primary_symbol_sort_key (sa);
2256 sob = bfd_mach_o_primary_symbol_sort_key (sb);
2257 if (soa < sob)
2258 return -1;
2259
2260 if (soa > sob)
2261 return 1;
2262
2263 /* If it's local or stab, just preserve the input order. */
2264 if (soa == 0)
2265 {
2266 if (sa->symbol.udata.i < sb->symbol.udata.i)
2267 return -1;
2268 if (sa->symbol.udata.i > sb->symbol.udata.i)
2269 return 1;
2270
2271 /* This is probably an error. */
2272 return 0;
2273 }
2274
2275 /* The second sort key is name. */
2276 return strcmp (sa->symbol.name, sb->symbol.name);
2277 }
2278
2279 /* Process the symbols.
2280
2281 This should be OK for single-module files - but it is not likely to work
2282 for multi-module shared libraries.
2283
2284 (a) If the application has not filled in the relevant mach-o fields, make
2285 an estimate.
2286
2287 (b) Order them, like this:
2288 ( i) local.
2289 (unsorted)
2290 ( ii) external defined
2291 (by name)
2292 (iii) external undefined/common
2293 (by name)
2294 ( iv) common
2295 (by name)
2296 */
2297
2298 static bfd_boolean
2299 bfd_mach_o_mangle_symbols (bfd *abfd)
2300 {
2301 unsigned long i;
2302 asymbol **symbols = bfd_get_outsymbols (abfd);
2303
2304 if (symbols == NULL || bfd_get_symcount (abfd) == 0)
2305 return TRUE;
2306
2307 for (i = 0; i < bfd_get_symcount (abfd); i++)
2308 {
2309 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2310
2311 /* We use this value, which is out-of-range as a symbol index, to signal
2312 that the mach-o-specific data are not filled in and need to be created
2313 from the bfd values. It is much preferable for the application to do
2314 this, since more meaningful diagnostics can be made that way. */
2315
2316 if (s->symbol.udata.i == SYM_MACHO_FIELDS_UNSET)
2317 {
2318 /* No symbol information has been set - therefore determine
2319 it from the bfd symbol flags/info. */
2320 if (s->symbol.section == bfd_abs_section_ptr)
2321 s->n_type = BFD_MACH_O_N_ABS;
2322 else if (s->symbol.section == bfd_und_section_ptr)
2323 {
2324 s->n_type = BFD_MACH_O_N_UNDF;
2325 if (s->symbol.flags & BSF_WEAK)
2326 s->n_desc |= BFD_MACH_O_N_WEAK_REF;
2327 /* mach-o automatically makes undefined symbols extern. */
2328 s->n_type |= BFD_MACH_O_N_EXT;
2329 s->symbol.flags |= BSF_GLOBAL;
2330 }
2331 else if (s->symbol.section == bfd_com_section_ptr)
2332 {
2333 s->n_type = BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT;
2334 s->symbol.flags |= BSF_GLOBAL;
2335 }
2336 else
2337 s->n_type = BFD_MACH_O_N_SECT;
2338
2339 if (s->symbol.flags & BSF_GLOBAL)
2340 s->n_type |= BFD_MACH_O_N_EXT;
2341 }
2342
2343 /* Put the section index in, where required. */
2344 if ((s->symbol.section != bfd_abs_section_ptr
2345 && s->symbol.section != bfd_und_section_ptr
2346 && s->symbol.section != bfd_com_section_ptr)
2347 || ((s->n_type & BFD_MACH_O_N_STAB) != 0
2348 && s->symbol.name == NULL))
2349 s->n_sect = s->symbol.section->output_section->target_index;
2350
2351 /* Number to preserve order for local and debug syms. */
2352 s->symbol.udata.i = i;
2353 }
2354
2355 /* Sort the symbols. */
2356 qsort ((void *) symbols, (size_t) bfd_get_symcount (abfd),
2357 sizeof (asymbol *), bfd_mach_o_cf_symbols);
2358
2359 for (i = 0; i < bfd_get_symcount (abfd); ++i)
2360 {
2361 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2362 s->symbol.udata.i = i; /* renumber. */
2363 }
2364
2365 return TRUE;
2366 }
2367
2368 /* We build a flat table of sections, which can be re-ordered if necessary.
2369 Fill in the section number and other mach-o-specific data. */
2370
2371 static bfd_boolean
2372 bfd_mach_o_mangle_sections (bfd *abfd, bfd_mach_o_data_struct *mdata)
2373 {
2374 asection *sec;
2375 unsigned target_index;
2376 unsigned nsect;
2377
2378 nsect = bfd_count_sections (abfd);
2379
2380 /* Don't do it if it's already set - assume the application knows what it's
2381 doing. */
2382 if (mdata->nsects == nsect
2383 && (mdata->nsects == 0 || mdata->sections != NULL))
2384 return TRUE;
2385
2386 /* We need to check that this can be done... */
2387 if (nsect > 255)
2388 {
2389 (*_bfd_error_handler) (_("mach-o: there are too many sections (%u)"
2390 " maximum is 255,\n"), nsect);
2391 return FALSE;
2392 }
2393
2394 mdata->nsects = nsect;
2395 mdata->sections = bfd_alloc (abfd,
2396 mdata->nsects * sizeof (bfd_mach_o_section *));
2397 if (mdata->sections == NULL)
2398 return FALSE;
2399
2400 /* Create Mach-O sections.
2401 Section type, attribute and align should have been set when the
2402 section was created - either read in or specified. */
2403 target_index = 0;
2404 for (sec = abfd->sections; sec; sec = sec->next)
2405 {
2406 unsigned bfd_align = bfd_get_section_alignment (abfd, sec);
2407 bfd_mach_o_section *msect = bfd_mach_o_get_mach_o_section (sec);
2408
2409 mdata->sections[target_index] = msect;
2410
2411 msect->addr = bfd_get_section_vma (abfd, sec);
2412 msect->size = bfd_get_section_size (sec);
2413
2414 /* Use the largest alignment set, in case it was bumped after the
2415 section was created. */
2416 msect->align = msect->align > bfd_align ? msect->align : bfd_align;
2417
2418 msect->offset = 0;
2419 sec->target_index = ++target_index;
2420 }
2421
2422 return TRUE;
2423 }
2424
2425 bfd_boolean
2426 bfd_mach_o_write_contents (bfd *abfd)
2427 {
2428 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2429 bfd_mach_o_load_command *cmd;
2430 bfd_mach_o_symtab_command *symtab = NULL;
2431 bfd_mach_o_dysymtab_command *dysymtab = NULL;
2432 bfd_mach_o_segment_command *linkedit = NULL;
2433
2434 /* Make the commands, if not already present. */
2435 if (!abfd->output_has_begun && !bfd_mach_o_build_commands (abfd))
2436 return FALSE;
2437 abfd->output_has_begun = TRUE;
2438
2439 /* Write the header. */
2440 if (!bfd_mach_o_write_header (abfd, &mdata->header))
2441 return FALSE;
2442
2443 /* First pass: allocate the linkedit segment. */
2444 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
2445 switch (cmd->type)
2446 {
2447 case BFD_MACH_O_LC_SEGMENT_64:
2448 case BFD_MACH_O_LC_SEGMENT:
2449 if (strcmp (cmd->command.segment.segname, "__LINKEDIT") == 0)
2450 linkedit = &cmd->command.segment;
2451 break;
2452 case BFD_MACH_O_LC_SYMTAB:
2453 symtab = &cmd->command.symtab;
2454 break;
2455 case BFD_MACH_O_LC_DYSYMTAB:
2456 dysymtab = &cmd->command.dysymtab;
2457 break;
2458 case BFD_MACH_O_LC_DYLD_INFO:
2459 {
2460 bfd_mach_o_dyld_info_command *di = &cmd->command.dyld_info;
2461
2462 if (di->rebase_size != 0)
2463 {
2464 di->rebase_off = mdata->filelen;
2465 mdata->filelen += di->rebase_size;
2466 }
2467 if (di->bind_size != 0)
2468 {
2469 di->bind_off = mdata->filelen;
2470 mdata->filelen += di->bind_size;
2471 }
2472 if (di->weak_bind_size != 0)
2473 {
2474 di->weak_bind_off = mdata->filelen;
2475 mdata->filelen += di->weak_bind_size;
2476 }
2477 if (di->lazy_bind_size != 0)
2478 {
2479 di->lazy_bind_off = mdata->filelen;
2480 mdata->filelen += di->lazy_bind_size;
2481 }
2482 if (di->export_size != 0)
2483 {
2484 di->export_off = mdata->filelen;
2485 mdata->filelen += di->export_size;
2486 }
2487 }
2488 break;
2489 case BFD_MACH_O_LC_LOAD_DYLIB:
2490 case BFD_MACH_O_LC_LOAD_DYLINKER:
2491 case BFD_MACH_O_LC_MAIN:
2492 /* Nothing to do. */
2493 break;
2494 default:
2495 (*_bfd_error_handler)
2496 (_("unable to allocate data for load command 0x%lx"),
2497 (unsigned long) cmd->type);
2498 break;
2499 }
2500
2501 /* Specially handle symtab and dysymtab. */
2502
2503 /* Pre-allocate the symbol table (but not the string table). The reason
2504 is that the dysymtab is after the symbol table but before the string
2505 table (required by the native strip tool). */
2506 if (symtab != NULL)
2507 {
2508 unsigned int symlen;
2509 unsigned int wide = bfd_mach_o_wide_p (abfd);
2510
2511 symlen = wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE;
2512
2513 /* Align for symbols. */
2514 mdata->filelen = FILE_ALIGN (mdata->filelen, wide ? 3 : 2);
2515 symtab->symoff = mdata->filelen;
2516
2517 symtab->nsyms = bfd_get_symcount (abfd);
2518 mdata->filelen += symtab->nsyms * symlen;
2519 }
2520
2521 /* Build the dysymtab. */
2522 if (dysymtab != NULL)
2523 if (!bfd_mach_o_build_dysymtab (abfd, dysymtab))
2524 return FALSE;
2525
2526 /* Write symtab and strtab. */
2527 if (symtab != NULL)
2528 if (!bfd_mach_o_write_symtab_content (abfd, symtab))
2529 return FALSE;
2530
2531 /* Adjust linkedit size. */
2532 if (linkedit != NULL)
2533 {
2534 /* bfd_vma pagemask = bfd_mach_o_get_backend_data (abfd)->page_size - 1; */
2535
2536 linkedit->vmsize = mdata->filelen - linkedit->fileoff;
2537 /* linkedit->vmsize = (linkedit->vmsize + pagemask) & ~pagemask; */
2538 linkedit->filesize = mdata->filelen - linkedit->fileoff;
2539
2540 linkedit->initprot = BFD_MACH_O_PROT_READ;
2541 linkedit->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
2542 | BFD_MACH_O_PROT_EXECUTE;
2543 }
2544
2545 /* Second pass: write commands. */
2546 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
2547 {
2548 struct mach_o_load_command_external raw;
2549 unsigned long typeflag;
2550
2551 typeflag = cmd->type | (cmd->type_required ? BFD_MACH_O_LC_REQ_DYLD : 0);
2552
2553 bfd_h_put_32 (abfd, typeflag, raw.cmd);
2554 bfd_h_put_32 (abfd, cmd->len, raw.cmdsize);
2555
2556 if (bfd_seek (abfd, cmd->offset, SEEK_SET) != 0
2557 || bfd_bwrite (&raw, BFD_MACH_O_LC_SIZE, abfd) != 8)
2558 return FALSE;
2559
2560 switch (cmd->type)
2561 {
2562 case BFD_MACH_O_LC_SEGMENT:
2563 if (!bfd_mach_o_write_segment_32 (abfd, cmd))
2564 return FALSE;
2565 break;
2566 case BFD_MACH_O_LC_SEGMENT_64:
2567 if (!bfd_mach_o_write_segment_64 (abfd, cmd))
2568 return FALSE;
2569 break;
2570 case BFD_MACH_O_LC_SYMTAB:
2571 if (!bfd_mach_o_write_symtab (abfd, cmd))
2572 return FALSE;
2573 break;
2574 case BFD_MACH_O_LC_DYSYMTAB:
2575 if (!bfd_mach_o_write_dysymtab (abfd, cmd))
2576 return FALSE;
2577 break;
2578 case BFD_MACH_O_LC_THREAD:
2579 case BFD_MACH_O_LC_UNIXTHREAD:
2580 if (!bfd_mach_o_write_thread (abfd, cmd))
2581 return FALSE;
2582 break;
2583 case BFD_MACH_O_LC_LOAD_DYLIB:
2584 if (!bfd_mach_o_write_dylib (abfd, cmd))
2585 return FALSE;
2586 break;
2587 case BFD_MACH_O_LC_LOAD_DYLINKER:
2588 if (!bfd_mach_o_write_dylinker (abfd, cmd))
2589 return FALSE;
2590 break;
2591 case BFD_MACH_O_LC_MAIN:
2592 if (!bfd_mach_o_write_main (abfd, cmd))
2593 return FALSE;
2594 break;
2595 case BFD_MACH_O_LC_DYLD_INFO:
2596 if (!bfd_mach_o_write_dyld_info (abfd, cmd))
2597 return FALSE;
2598 break;
2599 default:
2600 (*_bfd_error_handler)
2601 (_("unable to write unknown load command 0x%lx"),
2602 (unsigned long) cmd->type);
2603 return FALSE;
2604 }
2605 }
2606
2607 return TRUE;
2608 }
2609
2610 static void
2611 bfd_mach_o_append_section_to_segment (bfd_mach_o_segment_command *seg,
2612 bfd_mach_o_section *s)
2613 {
2614 if (seg->sect_head == NULL)
2615 seg->sect_head = s;
2616 else
2617 seg->sect_tail->next = s;
2618 seg->sect_tail = s;
2619 }
2620
2621 /* Create section Mach-O flags from BFD flags. */
2622
2623 static void
2624 bfd_mach_o_set_section_flags_from_bfd (bfd *abfd ATTRIBUTE_UNUSED,
2625 asection *sec)
2626 {
2627 flagword bfd_flags;
2628 bfd_mach_o_section *s = bfd_mach_o_get_mach_o_section (sec);
2629
2630 /* Create default flags. */
2631 bfd_flags = bfd_get_section_flags (abfd, sec);
2632 if ((bfd_flags & SEC_CODE) == SEC_CODE)
2633 s->flags = BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS
2634 | BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS
2635 | BFD_MACH_O_S_REGULAR;
2636 else if ((bfd_flags & (SEC_ALLOC | SEC_LOAD)) == SEC_ALLOC)
2637 s->flags = BFD_MACH_O_S_ZEROFILL;
2638 else if (bfd_flags & SEC_DEBUGGING)
2639 s->flags = BFD_MACH_O_S_REGULAR | BFD_MACH_O_S_ATTR_DEBUG;
2640 else
2641 s->flags = BFD_MACH_O_S_REGULAR;
2642 }
2643
2644 static bfd_boolean
2645 bfd_mach_o_build_obj_seg_command (bfd *abfd, bfd_mach_o_segment_command *seg)
2646 {
2647 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2648 unsigned int i, j;
2649
2650 seg->vmaddr = 0;
2651 seg->fileoff = mdata->filelen;
2652 seg->initprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
2653 | BFD_MACH_O_PROT_EXECUTE;
2654 seg->maxprot = seg->initprot;
2655
2656 /* Append sections to the segment.
2657
2658 This is a little tedious, we have to honor the need to account zerofill
2659 sections after all the rest. This forces us to do the calculation of
2660 total vmsize in three passes so that any alignment increments are
2661 properly accounted. */
2662 for (i = 0; i < mdata->nsects; ++i)
2663 {
2664 bfd_mach_o_section *s = mdata->sections[i];
2665 asection *sec = s->bfdsection;
2666
2667 /* Although we account for zerofill section sizes in vm order, they are
2668 placed in the file in source sequence. */
2669 bfd_mach_o_append_section_to_segment (seg, s);
2670 s->offset = 0;
2671
2672 /* Zerofill sections have zero file size & offset, the only content
2673 written to the file is the symbols. */
2674 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) == BFD_MACH_O_S_ZEROFILL
2675 || ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2676 == BFD_MACH_O_S_GB_ZEROFILL))
2677 continue;
2678
2679 /* The Darwin system tools (in MH_OBJECT files, at least) always account
2680 sections, even those with zero size. */
2681 if (s->size > 0)
2682 {
2683 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2684 seg->vmsize += s->size;
2685
2686 /* MH_OBJECT files have unaligned content. */
2687 if (1)
2688 {
2689 seg->filesize = FILE_ALIGN (seg->filesize, s->align);
2690 mdata->filelen = FILE_ALIGN (mdata->filelen, s->align);
2691 }
2692 seg->filesize += s->size;
2693
2694 /* The system tools write even zero-sized sections with an offset
2695 field set to the current file position. */
2696 s->offset = mdata->filelen;
2697 }
2698
2699 sec->filepos = s->offset;
2700 mdata->filelen += s->size;
2701 }
2702
2703 /* Now pass through again, for zerofill, only now we just update the
2704 vmsize, and then for zerofill_GB. */
2705 for (j = 0; j < 2; j++)
2706 {
2707 unsigned int stype;
2708
2709 if (j == 0)
2710 stype = BFD_MACH_O_S_ZEROFILL;
2711 else
2712 stype = BFD_MACH_O_S_GB_ZEROFILL;
2713
2714 for (i = 0; i < mdata->nsects; ++i)
2715 {
2716 bfd_mach_o_section *s = mdata->sections[i];
2717
2718 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != stype)
2719 continue;
2720
2721 if (s->size > 0)
2722 {
2723 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2724 seg->vmsize += s->size;
2725 }
2726 }
2727 }
2728
2729 /* Allocate space for the relocations. */
2730 mdata->filelen = FILE_ALIGN (mdata->filelen, 2);
2731
2732 for (i = 0; i < mdata->nsects; ++i)
2733 {
2734 bfd_mach_o_section *ms = mdata->sections[i];
2735 asection *sec = ms->bfdsection;
2736
2737 ms->nreloc = sec->reloc_count;
2738 if (ms->nreloc == 0)
2739 {
2740 /* Clear nreloc and reloff if there is no relocs. */
2741 ms->reloff = 0;
2742 continue;
2743 }
2744 sec->rel_filepos = mdata->filelen;
2745 ms->reloff = sec->rel_filepos;
2746 mdata->filelen += sec->reloc_count * BFD_MACH_O_RELENT_SIZE;
2747 }
2748
2749 return TRUE;
2750 }
2751
2752 static bfd_boolean
2753 bfd_mach_o_build_exec_seg_command (bfd *abfd, bfd_mach_o_segment_command *seg)
2754 {
2755 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2756 unsigned int i;
2757 bfd_vma pagemask = bfd_mach_o_get_backend_data (abfd)->page_size - 1;
2758 bfd_vma vma;
2759 bfd_mach_o_section *s;
2760
2761 seg->vmsize = 0;
2762
2763 seg->fileoff = mdata->filelen;
2764 seg->maxprot = 0;
2765 seg->initprot = 0;
2766 seg->flags = 0;
2767
2768 /* Append sections to the segment. We assume they are properly ordered
2769 by vma (but we check that). */
2770 vma = 0;
2771 for (i = 0; i < mdata->nsects; ++i)
2772 {
2773 s = mdata->sections[i];
2774
2775 /* Consider only sections for this segment. */
2776 if (strcmp (seg->segname, s->segname) != 0)
2777 continue;
2778
2779 bfd_mach_o_append_section_to_segment (seg, s);
2780
2781 if (s->addr < vma)
2782 {
2783 (*_bfd_error_handler)
2784 (_("section address (%lx) below start of segment (%lx)"),
2785 (unsigned long) s->addr, (unsigned long) vma);
2786 return FALSE;
2787 }
2788
2789 vma = s->addr + s->size;
2790 }
2791
2792 /* Set segment file offset: make it page aligned. */
2793 vma = seg->sect_head->addr;
2794 seg->vmaddr = vma & ~pagemask;
2795 if ((mdata->filelen & pagemask) > (vma & pagemask))
2796 mdata->filelen += pagemask + 1;
2797 seg->fileoff = mdata->filelen & ~pagemask;
2798 mdata->filelen = seg->fileoff + (vma & pagemask);
2799
2800 /* Set section file offset. */
2801 for (s = seg->sect_head; s != NULL; s = s->next)
2802 {
2803 asection *sec = s->bfdsection;
2804 flagword flags = bfd_get_section_flags (abfd, sec);
2805
2806 /* Adjust segment size. */
2807 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2808 seg->vmsize += s->size;
2809
2810 /* File offset and length. */
2811 seg->filesize = FILE_ALIGN (seg->filesize, s->align);
2812
2813 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != BFD_MACH_O_S_ZEROFILL
2814 && ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2815 != BFD_MACH_O_S_GB_ZEROFILL))
2816 {
2817 mdata->filelen = FILE_ALIGN (mdata->filelen, s->align);
2818
2819 s->offset = mdata->filelen;
2820 s->bfdsection->filepos = s->offset;
2821
2822 seg->filesize += s->size;
2823 mdata->filelen += s->size;
2824 }
2825 else
2826 {
2827 s->offset = 0;
2828 s->bfdsection->filepos = 0;
2829 }
2830
2831 /* Set protection. */
2832 if (flags & SEC_LOAD)
2833 {
2834 if (flags & SEC_CODE)
2835 seg->initprot |= BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_EXECUTE;
2836 if ((flags & (SEC_DATA | SEC_READONLY)) == SEC_DATA)
2837 seg->initprot |= BFD_MACH_O_PROT_WRITE | BFD_MACH_O_PROT_READ;
2838 }
2839
2840 /* Relocs shouldn't appear in non-object files. */
2841 if (s->bfdsection->reloc_count != 0)
2842 return FALSE;
2843 }
2844
2845 /* Set maxprot. */
2846 if (seg->initprot != 0)
2847 seg->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
2848 | BFD_MACH_O_PROT_EXECUTE;
2849 else
2850 seg->maxprot = 0;
2851
2852 /* Round segment size (and file size). */
2853 seg->vmsize = (seg->vmsize + pagemask) & ~pagemask;
2854 seg->filesize = (seg->filesize + pagemask) & ~pagemask;
2855 mdata->filelen = (mdata->filelen + pagemask) & ~pagemask;
2856
2857 return TRUE;
2858 }
2859
2860 /* Layout the commands: set commands size and offset, set ncmds and sizeofcmds
2861 fields in header. */
2862
2863 static bfd_boolean
2864 bfd_mach_o_layout_commands (bfd_mach_o_data_struct *mdata)
2865 {
2866 unsigned wide = mach_o_wide_p (&mdata->header);
2867 unsigned int hdrlen;
2868 ufile_ptr offset;
2869 bfd_mach_o_load_command *cmd;
2870 unsigned int align;
2871 bfd_boolean ret = TRUE;
2872
2873 hdrlen = wide ? BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
2874 align = wide ? 8 - 1 : 4 - 1;
2875 offset = hdrlen;
2876 mdata->header.ncmds = 0;
2877
2878 for (cmd = mdata->first_command; cmd; cmd = cmd->next)
2879 {
2880 mdata->header.ncmds++;
2881 cmd->offset = offset;
2882
2883 switch (cmd->type)
2884 {
2885 case BFD_MACH_O_LC_SEGMENT_64:
2886 cmd->len = BFD_MACH_O_LC_SEGMENT_64_SIZE
2887 + BFD_MACH_O_SECTION_64_SIZE * cmd->command.segment.nsects;
2888 break;
2889 case BFD_MACH_O_LC_SEGMENT:
2890 cmd->len = BFD_MACH_O_LC_SEGMENT_SIZE
2891 + BFD_MACH_O_SECTION_SIZE * cmd->command.segment.nsects;
2892 break;
2893 case BFD_MACH_O_LC_SYMTAB:
2894 cmd->len = sizeof (struct mach_o_symtab_command_external)
2895 + BFD_MACH_O_LC_SIZE;
2896 break;
2897 case BFD_MACH_O_LC_DYSYMTAB:
2898 cmd->len = sizeof (struct mach_o_dysymtab_command_external)
2899 + BFD_MACH_O_LC_SIZE;
2900 break;
2901 case BFD_MACH_O_LC_LOAD_DYLIB:
2902 cmd->len = sizeof (struct mach_o_dylib_command_external)
2903 + BFD_MACH_O_LC_SIZE;
2904 cmd->command.dylib.name_offset = cmd->len;
2905 cmd->len += strlen (cmd->command.dylib.name_str);
2906 cmd->len = (cmd->len + align) & ~align;
2907 break;
2908 case BFD_MACH_O_LC_LOAD_DYLINKER:
2909 cmd->len = sizeof (struct mach_o_str_command_external)
2910 + BFD_MACH_O_LC_SIZE;
2911 cmd->command.dylinker.name_offset = cmd->len;
2912 cmd->len += strlen (cmd->command.dylinker.name_str);
2913 cmd->len = (cmd->len + align) & ~align;
2914 break;
2915 case BFD_MACH_O_LC_MAIN:
2916 cmd->len = sizeof (struct mach_o_entry_point_command_external)
2917 + BFD_MACH_O_LC_SIZE;
2918 break;
2919 case BFD_MACH_O_LC_DYLD_INFO:
2920 cmd->len = sizeof (struct mach_o_dyld_info_command_external)
2921 + BFD_MACH_O_LC_SIZE;
2922 break;
2923 default:
2924 (*_bfd_error_handler)
2925 (_("unable to layout unknown load command 0x%lx"),
2926 (unsigned long) cmd->type);
2927 ret = FALSE;
2928 break;
2929 }
2930
2931 BFD_ASSERT (cmd->len % (align + 1) == 0);
2932 offset += cmd->len;
2933 }
2934 mdata->header.sizeofcmds = offset - hdrlen;
2935 mdata->filelen = offset;
2936
2937 return ret;
2938 }
2939
2940 /* Subroutine of bfd_mach_o_build_commands: set type, name and nsects of a
2941 segment. */
2942
2943 static void
2944 bfd_mach_o_init_segment (bfd_mach_o_data_struct *mdata,
2945 bfd_mach_o_load_command *cmd,
2946 const char *segname, unsigned int nbr_sect)
2947 {
2948 bfd_mach_o_segment_command *seg = &cmd->command.segment;
2949 unsigned wide = mach_o_wide_p (&mdata->header);
2950
2951 /* Init segment command. */
2952 cmd->type = wide ? BFD_MACH_O_LC_SEGMENT_64 : BFD_MACH_O_LC_SEGMENT;
2953 cmd->type_required = FALSE;
2954
2955 strcpy (seg->segname, segname);
2956 seg->nsects = nbr_sect;
2957
2958 seg->vmaddr = 0;
2959 seg->vmsize = 0;
2960
2961 seg->fileoff = 0;
2962 seg->filesize = 0;
2963 seg->maxprot = 0;
2964 seg->initprot = 0;
2965 seg->flags = 0;
2966 seg->sect_head = NULL;
2967 seg->sect_tail = NULL;
2968 }
2969
2970 /* Build Mach-O load commands (currently assuming an MH_OBJECT file).
2971 TODO: Other file formats, rebuilding symtab/dysymtab commands for strip
2972 and copy functionality. */
2973
2974 bfd_boolean
2975 bfd_mach_o_build_commands (bfd *abfd)
2976 {
2977 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2978 unsigned wide = mach_o_wide_p (&mdata->header);
2979 unsigned int nbr_segcmd = 0;
2980 bfd_mach_o_load_command *commands;
2981 unsigned int nbr_commands;
2982 int symtab_idx = -1;
2983 int dysymtab_idx = -1;
2984 int main_idx = -1;
2985 unsigned int i;
2986
2987 /* Return now if already built. */
2988 if (mdata->header.ncmds != 0)
2989 return TRUE;
2990
2991 /* Fill in the file type, if not already set. */
2992 if (mdata->header.filetype == 0)
2993 {
2994 if (abfd->flags & EXEC_P)
2995 mdata->header.filetype = BFD_MACH_O_MH_EXECUTE;
2996 else if (abfd->flags & DYNAMIC)
2997 mdata->header.filetype = BFD_MACH_O_MH_DYLIB;
2998 else
2999 mdata->header.filetype = BFD_MACH_O_MH_OBJECT;
3000 }
3001
3002 /* If hasn't already been done, flatten sections list, and sort
3003 if/when required. Must be done before the symbol table is adjusted,
3004 since that depends on properly numbered sections. */
3005 if (mdata->nsects == 0 || mdata->sections == NULL)
3006 if (! bfd_mach_o_mangle_sections (abfd, mdata))
3007 return FALSE;
3008
3009 /* Order the symbol table, fill-in/check mach-o specific fields and
3010 partition out any indirect symbols. */
3011 if (!bfd_mach_o_mangle_symbols (abfd))
3012 return FALSE;
3013
3014 /* Segment commands. */
3015 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT)
3016 {
3017 /* Only one segment for all the sections. But the segment is
3018 optional if there is no sections. */
3019 nbr_segcmd = (mdata->nsects > 0) ? 1 : 0;
3020 }
3021 else
3022 {
3023 bfd_mach_o_section *prev_sect = NULL;
3024
3025 /* One pagezero segment and one linkedit segment. */
3026 nbr_segcmd = 2;
3027
3028 /* Create one segment for associated segment name in sections.
3029 Assume that sections with the same segment name are consecutive. */
3030 for (i = 0; i < mdata->nsects; i++)
3031 {
3032 bfd_mach_o_section *this_sect = mdata->sections[i];
3033
3034 if (prev_sect == NULL
3035 || strcmp (prev_sect->segname, this_sect->segname) != 0)
3036 {
3037 nbr_segcmd++;
3038 prev_sect = this_sect;
3039 }
3040 }
3041 }
3042
3043 nbr_commands = nbr_segcmd;
3044
3045 /* One command for the symbol table (only if there are symbols. */
3046 if (bfd_get_symcount (abfd) > 0)
3047 symtab_idx = nbr_commands++;
3048
3049 /* FIXME:
3050 This is a rather crude test for whether we should build a dysymtab. */
3051 if (bfd_mach_o_should_emit_dysymtab ()
3052 && bfd_get_symcount (abfd))
3053 {
3054 /* If there should be a case where a dysymtab could be emitted without
3055 a symtab (seems improbable), this would need amending. */
3056 dysymtab_idx = nbr_commands++;
3057 }
3058
3059 /* Add an entry point command. */
3060 if (mdata->header.filetype == BFD_MACH_O_MH_EXECUTE
3061 && bfd_get_start_address (abfd) != 0)
3062 main_idx = nbr_commands++;
3063
3064 /* Well, we must have a header, at least. */
3065 mdata->filelen = wide ? BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
3066
3067 /* A bit unusual, but no content is valid;
3068 as -n empty.s -o empty.o */
3069 if (nbr_commands == 0)
3070 {
3071 /* Layout commands (well none...) and set headers command fields. */
3072 return bfd_mach_o_layout_commands (mdata);
3073 }
3074
3075 /* Create commands for segments (and symtabs), prepend them. */
3076 commands = bfd_zalloc (abfd, nbr_commands * sizeof (bfd_mach_o_load_command));
3077 if (commands == NULL)
3078 return FALSE;
3079 for (i = 0; i < nbr_commands - 1; i++)
3080 commands[i].next = &commands[i + 1];
3081 commands[nbr_commands - 1].next = mdata->first_command;
3082 if (mdata->first_command == NULL)
3083 mdata->last_command = &commands[nbr_commands - 1];
3084 mdata->first_command = &commands[0];
3085
3086 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT && nbr_segcmd != 0)
3087 {
3088 /* For object file, there is only one segment. */
3089 bfd_mach_o_init_segment (mdata, &commands[0], "", mdata->nsects);
3090 }
3091 else if (nbr_segcmd != 0)
3092 {
3093 bfd_mach_o_load_command *cmd;
3094
3095 BFD_ASSERT (nbr_segcmd >= 2);
3096
3097 /* The pagezero. */
3098 cmd = &commands[0];
3099 bfd_mach_o_init_segment (mdata, cmd, "__PAGEZERO", 0);
3100
3101 /* Segments from sections. */
3102 cmd++;
3103 for (i = 0; i < mdata->nsects;)
3104 {
3105 const char *segname = mdata->sections[i]->segname;
3106 unsigned int nbr_sect = 1;
3107
3108 /* Count number of sections for this segment. */
3109 for (i++; i < mdata->nsects; i++)
3110 if (strcmp (mdata->sections[i]->segname, segname) == 0)
3111 nbr_sect++;
3112 else
3113 break;
3114
3115 bfd_mach_o_init_segment (mdata, cmd, segname, nbr_sect);
3116 cmd++;
3117 }
3118
3119 /* The linkedit. */
3120 bfd_mach_o_init_segment (mdata, cmd, "__LINKEDIT", 0);
3121 }
3122
3123 if (symtab_idx >= 0)
3124 {
3125 /* Init symtab command. */
3126 bfd_mach_o_load_command *cmd = &commands[symtab_idx];
3127
3128 cmd->type = BFD_MACH_O_LC_SYMTAB;
3129 cmd->type_required = FALSE;
3130 }
3131
3132 /* If required, setup symtab command, see comment above about the quality
3133 of this test. */
3134 if (dysymtab_idx >= 0)
3135 {
3136 bfd_mach_o_load_command *cmd = &commands[dysymtab_idx];
3137
3138 cmd->type = BFD_MACH_O_LC_DYSYMTAB;
3139 cmd->type_required = FALSE;
3140 }
3141
3142 /* Create the main command. */
3143 if (main_idx >= 0)
3144 {
3145 bfd_mach_o_load_command *cmd = &commands[main_idx];
3146
3147 cmd->type = BFD_MACH_O_LC_MAIN;
3148 cmd->type_required = TRUE;
3149
3150 cmd->command.main.entryoff = 0;
3151 cmd->command.main.stacksize = 0;
3152 }
3153
3154 /* Layout commands. */
3155 if (! bfd_mach_o_layout_commands (mdata))
3156 return FALSE;
3157
3158 /* So, now we have sized the commands and the filelen set to that.
3159 Now we can build the segment command and set the section file offsets. */
3160 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT)
3161 {
3162 for (i = 0; i < nbr_segcmd; i++)
3163 if (!bfd_mach_o_build_obj_seg_command
3164 (abfd, &commands[i].command.segment))
3165 return FALSE;
3166 }
3167 else
3168 {
3169 bfd_vma maxvma = 0;
3170
3171 /* Skip pagezero and linkedit segments. */
3172 for (i = 1; i < nbr_segcmd - 1; i++)
3173 {
3174 bfd_mach_o_segment_command *seg = &commands[i].command.segment;
3175
3176 if (!bfd_mach_o_build_exec_seg_command (abfd, seg))
3177 return FALSE;
3178
3179 if (seg->vmaddr + seg->vmsize > maxvma)
3180 maxvma = seg->vmaddr + seg->vmsize;
3181 }
3182
3183 /* Set the size of __PAGEZERO. */
3184 commands[0].command.segment.vmsize =
3185 commands[1].command.segment.vmaddr;
3186
3187 /* Set the vma and fileoff of __LINKEDIT. */
3188 commands[nbr_segcmd - 1].command.segment.vmaddr = maxvma;
3189 commands[nbr_segcmd - 1].command.segment.fileoff = mdata->filelen;
3190
3191 /* Set entry point (once segments have been laid out). */
3192 if (main_idx >= 0)
3193 commands[main_idx].command.main.entryoff =
3194 bfd_get_start_address (abfd) - commands[1].command.segment.vmaddr;
3195 }
3196
3197 return TRUE;
3198 }
3199
3200 /* Set the contents of a section. */
3201
3202 bfd_boolean
3203 bfd_mach_o_set_section_contents (bfd *abfd,
3204 asection *section,
3205 const void * location,
3206 file_ptr offset,
3207 bfd_size_type count)
3208 {
3209 file_ptr pos;
3210
3211 /* Trying to write the first section contents will trigger the creation of
3212 the load commands if they are not already present. */
3213 if (!abfd->output_has_begun && !bfd_mach_o_build_commands (abfd))
3214 return FALSE;
3215
3216 if (count == 0)
3217 return TRUE;
3218
3219 pos = section->filepos + offset;
3220 if (bfd_seek (abfd, pos, SEEK_SET) != 0
3221 || bfd_bwrite (location, count, abfd) != count)
3222 return FALSE;
3223
3224 return TRUE;
3225 }
3226
3227 int
3228 bfd_mach_o_sizeof_headers (bfd *a ATTRIBUTE_UNUSED,
3229 struct bfd_link_info *info ATTRIBUTE_UNUSED)
3230 {
3231 return 0;
3232 }
3233
3234 /* Make an empty symbol. This is required only because
3235 bfd_make_section_anyway wants to create a symbol for the section. */
3236
3237 asymbol *
3238 bfd_mach_o_make_empty_symbol (bfd *abfd)
3239 {
3240 asymbol *new_symbol;
3241
3242 new_symbol = bfd_zalloc (abfd, sizeof (bfd_mach_o_asymbol));
3243 if (new_symbol == NULL)
3244 return new_symbol;
3245 new_symbol->the_bfd = abfd;
3246 new_symbol->udata.i = SYM_MACHO_FIELDS_UNSET;
3247 return new_symbol;
3248 }
3249
3250 static bfd_boolean
3251 bfd_mach_o_read_header (bfd *abfd, bfd_mach_o_header *header)
3252 {
3253 struct mach_o_header_external raw;
3254 unsigned int size;
3255 bfd_vma (*get32) (const void *) = NULL;
3256
3257 /* Just read the magic number. */
3258 if (bfd_seek (abfd, 0, SEEK_SET) != 0
3259 || bfd_bread (raw.magic, sizeof (raw.magic), abfd) != 4)
3260 return FALSE;
3261
3262 if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC)
3263 {
3264 header->byteorder = BFD_ENDIAN_BIG;
3265 header->magic = BFD_MACH_O_MH_MAGIC;
3266 header->version = 1;
3267 get32 = bfd_getb32;
3268 }
3269 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC)
3270 {
3271 header->byteorder = BFD_ENDIAN_LITTLE;
3272 header->magic = BFD_MACH_O_MH_MAGIC;
3273 header->version = 1;
3274 get32 = bfd_getl32;
3275 }
3276 else if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64)
3277 {
3278 header->byteorder = BFD_ENDIAN_BIG;
3279 header->magic = BFD_MACH_O_MH_MAGIC_64;
3280 header->version = 2;
3281 get32 = bfd_getb32;
3282 }
3283 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64)
3284 {
3285 header->byteorder = BFD_ENDIAN_LITTLE;
3286 header->magic = BFD_MACH_O_MH_MAGIC_64;
3287 header->version = 2;
3288 get32 = bfd_getl32;
3289 }
3290 else
3291 {
3292 header->byteorder = BFD_ENDIAN_UNKNOWN;
3293 return FALSE;
3294 }
3295
3296 /* Once the size of the header is known, read the full header. */
3297 size = mach_o_wide_p (header) ?
3298 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
3299
3300 if (bfd_seek (abfd, 0, SEEK_SET) != 0
3301 || bfd_bread (&raw, size, abfd) != size)
3302 return FALSE;
3303
3304 header->cputype = (*get32) (raw.cputype);
3305 header->cpusubtype = (*get32) (raw.cpusubtype);
3306 header->filetype = (*get32) (raw.filetype);
3307 header->ncmds = (*get32) (raw.ncmds);
3308 header->sizeofcmds = (*get32) (raw.sizeofcmds);
3309 header->flags = (*get32) (raw.flags);
3310
3311 if (mach_o_wide_p (header))
3312 header->reserved = (*get32) (raw.reserved);
3313 else
3314 header->reserved = 0;
3315
3316 return TRUE;
3317 }
3318
3319 bfd_boolean
3320 bfd_mach_o_new_section_hook (bfd *abfd, asection *sec)
3321 {
3322 bfd_mach_o_section *s;
3323 unsigned bfdalign = bfd_get_section_alignment (abfd, sec);
3324
3325 s = bfd_mach_o_get_mach_o_section (sec);
3326 if (s == NULL)
3327 {
3328 flagword bfd_flags;
3329 static const mach_o_section_name_xlat * xlat;
3330
3331 s = (bfd_mach_o_section *) bfd_zalloc (abfd, sizeof (*s));
3332 if (s == NULL)
3333 return FALSE;
3334 sec->used_by_bfd = s;
3335 s->bfdsection = sec;
3336
3337 /* Create the Darwin seg/sect name pair from the bfd name.
3338 If this is a canonical name for which a specific paiting exists
3339 there will also be defined flags, type, attribute and alignment
3340 values. */
3341 xlat = bfd_mach_o_convert_section_name_to_mach_o (abfd, sec, s);
3342 if (xlat != NULL)
3343 {
3344 s->flags = xlat->macho_sectype | xlat->macho_secattr;
3345 s->align = xlat->sectalign > bfdalign ? xlat->sectalign
3346 : bfdalign;
3347 (void) bfd_set_section_alignment (abfd, sec, s->align);
3348 bfd_flags = bfd_get_section_flags (abfd, sec);
3349 if (bfd_flags == SEC_NO_FLAGS)
3350 bfd_set_section_flags (abfd, sec, xlat->bfd_flags);
3351 }
3352 else
3353 /* Create default flags. */
3354 bfd_mach_o_set_section_flags_from_bfd (abfd, sec);
3355 }
3356
3357 return _bfd_generic_new_section_hook (abfd, sec);
3358 }
3359
3360 static void
3361 bfd_mach_o_init_section_from_mach_o (bfd *abfd, asection *sec,
3362 unsigned long prot)
3363 {
3364 flagword flags;
3365 bfd_mach_o_section *section;
3366
3367 flags = bfd_get_section_flags (abfd, sec);
3368 section = bfd_mach_o_get_mach_o_section (sec);
3369
3370 /* TODO: see if we should use the xlat system for doing this by
3371 preference and fall back to this for unknown sections. */
3372
3373 if (flags == SEC_NO_FLAGS)
3374 {
3375 /* Try to guess flags. */
3376 if (section->flags & BFD_MACH_O_S_ATTR_DEBUG)
3377 flags = SEC_DEBUGGING;
3378 else
3379 {
3380 flags = SEC_ALLOC;
3381 if ((section->flags & BFD_MACH_O_SECTION_TYPE_MASK)
3382 != BFD_MACH_O_S_ZEROFILL)
3383 {
3384 flags |= SEC_LOAD;
3385 if (prot & BFD_MACH_O_PROT_EXECUTE)
3386 flags |= SEC_CODE;
3387 if (prot & BFD_MACH_O_PROT_WRITE)
3388 flags |= SEC_DATA;
3389 else if (prot & BFD_MACH_O_PROT_READ)
3390 flags |= SEC_READONLY;
3391 }
3392 }
3393 }
3394 else
3395 {
3396 if ((flags & SEC_DEBUGGING) == 0)
3397 flags |= SEC_ALLOC;
3398 }
3399
3400 if (section->offset != 0)
3401 flags |= SEC_HAS_CONTENTS;
3402 if (section->nreloc != 0)
3403 flags |= SEC_RELOC;
3404
3405 bfd_set_section_flags (abfd, sec, flags);
3406
3407 sec->vma = section->addr;
3408 sec->lma = section->addr;
3409 sec->size = section->size;
3410 sec->filepos = section->offset;
3411 sec->alignment_power = section->align;
3412 sec->segment_mark = 0;
3413 sec->reloc_count = section->nreloc;
3414 sec->rel_filepos = section->reloff;
3415 }
3416
3417 static asection *
3418 bfd_mach_o_make_bfd_section (bfd *abfd,
3419 const unsigned char *segname,
3420 const unsigned char *sectname)
3421 {
3422 const char *sname;
3423 flagword flags;
3424
3425 bfd_mach_o_convert_section_name_to_bfd
3426 (abfd, (const char *)segname, (const char *)sectname, &sname, &flags);
3427 if (sname == NULL)
3428 return NULL;
3429
3430 return bfd_make_section_anyway_with_flags (abfd, sname, flags);
3431 }
3432
3433 static asection *
3434 bfd_mach_o_read_section_32 (bfd *abfd,
3435 unsigned int offset,
3436 unsigned long prot)
3437 {
3438 struct mach_o_section_32_external raw;
3439 asection *sec;
3440 bfd_mach_o_section *section;
3441
3442 if (bfd_seek (abfd, offset, SEEK_SET) != 0
3443 || (bfd_bread (&raw, BFD_MACH_O_SECTION_SIZE, abfd)
3444 != BFD_MACH_O_SECTION_SIZE))
3445 return NULL;
3446
3447 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname);
3448 if (sec == NULL)
3449 return NULL;
3450
3451 section = bfd_mach_o_get_mach_o_section (sec);
3452 memcpy (section->segname, raw.segname, sizeof (raw.segname));
3453 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0;
3454 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname));
3455 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0;
3456 section->addr = bfd_h_get_32 (abfd, raw.addr);
3457 section->size = bfd_h_get_32 (abfd, raw.size);
3458 section->offset = bfd_h_get_32 (abfd, raw.offset);
3459 section->align = bfd_h_get_32 (abfd, raw.align);
3460 section->reloff = bfd_h_get_32 (abfd, raw.reloff);
3461 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc);
3462 section->flags = bfd_h_get_32 (abfd, raw.flags);
3463 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1);
3464 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2);
3465 section->reserved3 = 0;
3466
3467 bfd_mach_o_init_section_from_mach_o (abfd, sec, prot);
3468
3469 return sec;
3470 }
3471
3472 static asection *
3473 bfd_mach_o_read_section_64 (bfd *abfd,
3474 unsigned int offset,
3475 unsigned long prot)
3476 {
3477 struct mach_o_section_64_external raw;
3478 asection *sec;
3479 bfd_mach_o_section *section;
3480
3481 if (bfd_seek (abfd, offset, SEEK_SET) != 0
3482 || (bfd_bread (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd)
3483 != BFD_MACH_O_SECTION_64_SIZE))
3484 return NULL;
3485
3486 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname);
3487 if (sec == NULL)
3488 return NULL;
3489
3490 section = bfd_mach_o_get_mach_o_section (sec);
3491 memcpy (section->segname, raw.segname, sizeof (raw.segname));
3492 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0;
3493 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname));
3494 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0;
3495 section->addr = bfd_h_get_64 (abfd, raw.addr);
3496 section->size = bfd_h_get_64 (abfd, raw.size);
3497 section->offset = bfd_h_get_32 (abfd, raw.offset);
3498 section->align = bfd_h_get_32 (abfd, raw.align);
3499 section->reloff = bfd_h_get_32 (abfd, raw.reloff);
3500 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc);
3501 section->flags = bfd_h_get_32 (abfd, raw.flags);
3502 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1);
3503 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2);
3504 section->reserved3 = bfd_h_get_32 (abfd, raw.reserved3);
3505
3506 bfd_mach_o_init_section_from_mach_o (abfd, sec, prot);
3507
3508 return sec;
3509 }
3510
3511 static asection *
3512 bfd_mach_o_read_section (bfd *abfd,
3513 unsigned int offset,
3514 unsigned long prot,
3515 unsigned int wide)
3516 {
3517 if (wide)
3518 return bfd_mach_o_read_section_64 (abfd, offset, prot);
3519 else
3520 return bfd_mach_o_read_section_32 (abfd, offset, prot);
3521 }
3522
3523 static bfd_boolean
3524 bfd_mach_o_read_symtab_symbol (bfd *abfd,
3525 bfd_mach_o_symtab_command *sym,
3526 bfd_mach_o_asymbol *s,
3527 unsigned long i)
3528 {
3529 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3530 unsigned int wide = mach_o_wide_p (&mdata->header);
3531 unsigned int symwidth =
3532 wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE;
3533 unsigned int symoff = sym->symoff + (i * symwidth);
3534 struct mach_o_nlist_64_external raw;
3535 unsigned char type = -1;
3536 unsigned char section = -1;
3537 short desc = -1;
3538 symvalue value = -1;
3539 unsigned long stroff = -1;
3540 unsigned int symtype = -1;
3541
3542 BFD_ASSERT (sym->strtab != NULL);
3543
3544 if (bfd_seek (abfd, symoff, SEEK_SET) != 0
3545 || bfd_bread (&raw, symwidth, abfd) != symwidth)
3546 {
3547 (*_bfd_error_handler)
3548 (_("bfd_mach_o_read_symtab_symbol: unable to read %d bytes at %lu"),
3549 symwidth, (unsigned long) symoff);
3550 return FALSE;
3551 }
3552
3553 stroff = bfd_h_get_32 (abfd, raw.n_strx);
3554 type = bfd_h_get_8 (abfd, raw.n_type);
3555 symtype = type & BFD_MACH_O_N_TYPE;
3556 section = bfd_h_get_8 (abfd, raw.n_sect);
3557 desc = bfd_h_get_16 (abfd, raw.n_desc);
3558 if (wide)
3559 value = bfd_h_get_64 (abfd, raw.n_value);
3560 else
3561 value = bfd_h_get_32 (abfd, raw.n_value);
3562
3563 if (stroff >= sym->strsize)
3564 {
3565 (*_bfd_error_handler)
3566 (_("bfd_mach_o_read_symtab_symbol: name out of range (%lu >= %lu)"),
3567 (unsigned long) stroff,
3568 (unsigned long) sym->strsize);
3569 return FALSE;
3570 }
3571
3572 s->symbol.the_bfd = abfd;
3573 s->symbol.name = sym->strtab + stroff;
3574 s->symbol.value = value;
3575 s->symbol.flags = 0x0;
3576 s->symbol.udata.i = i;
3577 s->n_type = type;
3578 s->n_sect = section;
3579 s->n_desc = desc;
3580
3581 if (type & BFD_MACH_O_N_STAB)
3582 {
3583 s->symbol.flags |= BSF_DEBUGGING;
3584 s->symbol.section = bfd_und_section_ptr;
3585 switch (type)
3586 {
3587 case N_FUN:
3588 case N_STSYM:
3589 case N_LCSYM:
3590 case N_BNSYM:
3591 case N_SLINE:
3592 case N_ENSYM:
3593 case N_ECOMM:
3594 case N_ECOML:
3595 case N_GSYM:
3596 if ((section > 0) && (section <= mdata->nsects))
3597 {
3598 s->symbol.section = mdata->sections[section - 1]->bfdsection;
3599 s->symbol.value =
3600 s->symbol.value - mdata->sections[section - 1]->addr;
3601 }
3602 break;
3603 }
3604 }
3605 else
3606 {
3607 if (type & (BFD_MACH_O_N_PEXT | BFD_MACH_O_N_EXT))
3608 s->symbol.flags |= BSF_GLOBAL;
3609 else
3610 s->symbol.flags |= BSF_LOCAL;
3611
3612 switch (symtype)
3613 {
3614 case BFD_MACH_O_N_UNDF:
3615 if (type == (BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT)
3616 && s->symbol.value != 0)
3617 {
3618 /* A common symbol. */
3619 s->symbol.section = bfd_com_section_ptr;
3620 s->symbol.flags = BSF_NO_FLAGS;
3621 }
3622 else
3623 {
3624 s->symbol.section = bfd_und_section_ptr;
3625 if (s->n_desc & BFD_MACH_O_N_WEAK_REF)
3626 s->symbol.flags |= BSF_WEAK;
3627 }
3628 break;
3629 case BFD_MACH_O_N_PBUD:
3630 s->symbol.section = bfd_und_section_ptr;
3631 break;
3632 case BFD_MACH_O_N_ABS:
3633 s->symbol.section = bfd_abs_section_ptr;
3634 break;
3635 case BFD_MACH_O_N_SECT:
3636 if ((section > 0) && (section <= mdata->nsects))
3637 {
3638 s->symbol.section = mdata->sections[section - 1]->bfdsection;
3639 s->symbol.value =
3640 s->symbol.value - mdata->sections[section - 1]->addr;
3641 }
3642 else
3643 {
3644 /* Mach-O uses 0 to mean "no section"; not an error. */
3645 if (section != 0)
3646 {
3647 (*_bfd_error_handler) (_("bfd_mach_o_read_symtab_symbol: "
3648 "symbol \"%s\" specified invalid section %d (max %lu): setting to undefined"),
3649 s->symbol.name, section, mdata->nsects);
3650 }
3651 s->symbol.section = bfd_und_section_ptr;
3652 }
3653 break;
3654 case BFD_MACH_O_N_INDR:
3655 /* FIXME: we don't follow the BFD convention as this indirect symbol
3656 won't be followed by the referenced one. This looks harmless
3657 unless we start using the linker. */
3658 s->symbol.flags |= BSF_INDIRECT;
3659 s->symbol.section = bfd_ind_section_ptr;
3660 s->symbol.value = 0;
3661 break;
3662 default:
3663 (*_bfd_error_handler) (_("bfd_mach_o_read_symtab_symbol: "
3664 "symbol \"%s\" specified invalid type field 0x%x: setting to undefined"),
3665 s->symbol.name, symtype);
3666 s->symbol.section = bfd_und_section_ptr;
3667 break;
3668 }
3669 }
3670
3671 return TRUE;
3672 }
3673
3674 bfd_boolean
3675 bfd_mach_o_read_symtab_strtab (bfd *abfd)
3676 {
3677 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3678 bfd_mach_o_symtab_command *sym = mdata->symtab;
3679
3680 /* Fail if there is no symtab. */
3681 if (sym == NULL)
3682 return FALSE;
3683
3684 /* Success if already loaded. */
3685 if (sym->strtab)
3686 return TRUE;
3687
3688 if (abfd->flags & BFD_IN_MEMORY)
3689 {
3690 struct bfd_in_memory *b;
3691
3692 b = (struct bfd_in_memory *) abfd->iostream;
3693
3694 if ((sym->stroff + sym->strsize) > b->size)
3695 {
3696 bfd_set_error (bfd_error_file_truncated);
3697 return FALSE;
3698 }
3699 sym->strtab = (char *) b->buffer + sym->stroff;
3700 }
3701 else
3702 {
3703 sym->strtab = bfd_alloc (abfd, sym->strsize + 1);
3704 if (sym->strtab == NULL)
3705 return FALSE;
3706
3707 if (bfd_seek (abfd, sym->stroff, SEEK_SET) != 0
3708 || bfd_bread (sym->strtab, sym->strsize, abfd) != sym->strsize)
3709 {
3710 /* PR 17512: file: 10888-1609-0.004. */
3711 bfd_release (abfd, sym->strtab);
3712 sym->strtab = NULL;
3713 bfd_set_error (bfd_error_file_truncated);
3714 return FALSE;
3715 }
3716 /* Zero terminate the string table. */
3717 sym->strtab[sym->strsize] = 0;
3718 }
3719
3720 return TRUE;
3721 }
3722
3723 bfd_boolean
3724 bfd_mach_o_read_symtab_symbols (bfd *abfd)
3725 {
3726 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3727 bfd_mach_o_symtab_command *sym = mdata->symtab;
3728 unsigned long i;
3729
3730 if (sym == NULL || sym->symbols)
3731 /* Return now if there are no symbols or if already loaded. */
3732 return TRUE;
3733
3734 sym->symbols = bfd_alloc (abfd, sym->nsyms * sizeof (bfd_mach_o_asymbol));
3735
3736 if (sym->symbols == NULL)
3737 {
3738 (*_bfd_error_handler) (_("bfd_mach_o_read_symtab_symbols: unable to allocate memory for symbols"));
3739 return FALSE;
3740 }
3741
3742 if (!bfd_mach_o_read_symtab_strtab (abfd))
3743 {
3744 bfd_release (abfd, sym->symbols);
3745 sym->symbols = NULL;
3746 return FALSE;
3747 }
3748
3749 for (i = 0; i < sym->nsyms; i++)
3750 {
3751 if (!bfd_mach_o_read_symtab_symbol (abfd, sym, &sym->symbols[i], i))
3752 {
3753 bfd_release (abfd, sym->symbols);
3754 sym->symbols = NULL;
3755 return FALSE;
3756 }
3757 }
3758
3759 return TRUE;
3760 }
3761
3762 static const char *
3763 bfd_mach_o_i386_flavour_string (unsigned int flavour)
3764 {
3765 switch ((int) flavour)
3766 {
3767 case BFD_MACH_O_x86_THREAD_STATE32: return "x86_THREAD_STATE32";
3768 case BFD_MACH_O_x86_FLOAT_STATE32: return "x86_FLOAT_STATE32";
3769 case BFD_MACH_O_x86_EXCEPTION_STATE32: return "x86_EXCEPTION_STATE32";
3770 case BFD_MACH_O_x86_THREAD_STATE64: return "x86_THREAD_STATE64";
3771 case BFD_MACH_O_x86_FLOAT_STATE64: return "x86_FLOAT_STATE64";
3772 case BFD_MACH_O_x86_EXCEPTION_STATE64: return "x86_EXCEPTION_STATE64";
3773 case BFD_MACH_O_x86_THREAD_STATE: return "x86_THREAD_STATE";
3774 case BFD_MACH_O_x86_FLOAT_STATE: return "x86_FLOAT_STATE";
3775 case BFD_MACH_O_x86_EXCEPTION_STATE: return "x86_EXCEPTION_STATE";
3776 case BFD_MACH_O_x86_DEBUG_STATE32: return "x86_DEBUG_STATE32";
3777 case BFD_MACH_O_x86_DEBUG_STATE64: return "x86_DEBUG_STATE64";
3778 case BFD_MACH_O_x86_DEBUG_STATE: return "x86_DEBUG_STATE";
3779 case BFD_MACH_O_x86_THREAD_STATE_NONE: return "x86_THREAD_STATE_NONE";
3780 default: return "UNKNOWN";
3781 }
3782 }
3783
3784 static const char *
3785 bfd_mach_o_ppc_flavour_string (unsigned int flavour)
3786 {
3787 switch ((int) flavour)
3788 {
3789 case BFD_MACH_O_PPC_THREAD_STATE: return "PPC_THREAD_STATE";
3790 case BFD_MACH_O_PPC_FLOAT_STATE: return "PPC_FLOAT_STATE";
3791 case BFD_MACH_O_PPC_EXCEPTION_STATE: return "PPC_EXCEPTION_STATE";
3792 case BFD_MACH_O_PPC_VECTOR_STATE: return "PPC_VECTOR_STATE";
3793 case BFD_MACH_O_PPC_THREAD_STATE64: return "PPC_THREAD_STATE64";
3794 case BFD_MACH_O_PPC_EXCEPTION_STATE64: return "PPC_EXCEPTION_STATE64";
3795 default: return "UNKNOWN";
3796 }
3797 }
3798
3799 static bfd_boolean
3800 bfd_mach_o_read_dylinker (bfd *abfd, bfd_mach_o_load_command *command)
3801 {
3802 bfd_mach_o_dylinker_command *cmd = &command->command.dylinker;
3803 struct mach_o_str_command_external raw;
3804 unsigned int nameoff;
3805 unsigned int namelen;
3806
3807 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3808 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3809 return FALSE;
3810
3811 nameoff = bfd_h_get_32 (abfd, raw.str);
3812
3813 cmd->name_offset = nameoff;
3814 namelen = command->len - nameoff;
3815 nameoff += command->offset;
3816 cmd->name_str = bfd_alloc (abfd, namelen);
3817 if (cmd->name_str == NULL)
3818 return FALSE;
3819 if (bfd_seek (abfd, nameoff, SEEK_SET) != 0
3820 || bfd_bread (cmd->name_str, namelen, abfd) != namelen)
3821 return FALSE;
3822 return TRUE;
3823 }
3824
3825 static bfd_boolean
3826 bfd_mach_o_read_dylib (bfd *abfd, bfd_mach_o_load_command *command)
3827 {
3828 bfd_mach_o_dylib_command *cmd = &command->command.dylib;
3829 struct mach_o_dylib_command_external raw;
3830 unsigned int nameoff;
3831 unsigned int namelen;
3832
3833 switch (command->type)
3834 {
3835 case BFD_MACH_O_LC_LOAD_DYLIB:
3836 case BFD_MACH_O_LC_LAZY_LOAD_DYLIB:
3837 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
3838 case BFD_MACH_O_LC_ID_DYLIB:
3839 case BFD_MACH_O_LC_REEXPORT_DYLIB:
3840 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
3841 break;
3842 default:
3843 BFD_FAIL ();
3844 return FALSE;
3845 }
3846
3847 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3848 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3849 return FALSE;
3850
3851 nameoff = bfd_h_get_32 (abfd, raw.name);
3852 cmd->timestamp = bfd_h_get_32 (abfd, raw.timestamp);
3853 cmd->current_version = bfd_h_get_32 (abfd, raw.current_version);
3854 cmd->compatibility_version = bfd_h_get_32 (abfd, raw.compatibility_version);
3855
3856 cmd->name_offset = command->offset + nameoff;
3857 namelen = command->len - nameoff;
3858 cmd->name_str = bfd_alloc (abfd, namelen);
3859 if (cmd->name_str == NULL)
3860 return FALSE;
3861 if (bfd_seek (abfd, cmd->name_offset, SEEK_SET) != 0
3862 || bfd_bread (cmd->name_str, namelen, abfd) != namelen)
3863 return FALSE;
3864 return TRUE;
3865 }
3866
3867 static bfd_boolean
3868 bfd_mach_o_read_prebound_dylib (bfd *abfd,
3869 bfd_mach_o_load_command *command)
3870 {
3871 bfd_mach_o_prebound_dylib_command *cmd = &command->command.prebound_dylib;
3872 struct mach_o_prebound_dylib_command_external raw;
3873 unsigned int nameoff;
3874 unsigned int modoff;
3875 unsigned int str_len;
3876 unsigned char *str;
3877
3878 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3879 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3880 return FALSE;
3881
3882 nameoff = bfd_h_get_32 (abfd, raw.name);
3883 modoff = bfd_h_get_32 (abfd, raw.linked_modules);
3884 if (nameoff > command->len || modoff > command->len)
3885 return FALSE;
3886
3887 str_len = command->len - sizeof (raw);
3888 str = bfd_alloc (abfd, str_len);
3889 if (str == NULL)
3890 return FALSE;
3891 if (bfd_bread (str, str_len, abfd) != str_len)
3892 return FALSE;
3893
3894 cmd->name_offset = command->offset + nameoff;
3895 cmd->nmodules = bfd_h_get_32 (abfd, raw.nmodules);
3896 cmd->linked_modules_offset = command->offset + modoff;
3897
3898 cmd->name_str = (char *)str + nameoff - (sizeof (raw) + BFD_MACH_O_LC_SIZE);
3899 cmd->linked_modules = str + modoff - (sizeof (raw) + BFD_MACH_O_LC_SIZE);
3900 return TRUE;
3901 }
3902
3903 static bfd_boolean
3904 bfd_mach_o_read_prebind_cksum (bfd *abfd,
3905 bfd_mach_o_load_command *command)
3906 {
3907 bfd_mach_o_prebind_cksum_command *cmd = &command->command.prebind_cksum;
3908 struct mach_o_prebind_cksum_command_external raw;
3909
3910 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3911 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3912 return FALSE;
3913
3914 cmd->cksum = bfd_get_32 (abfd, raw.cksum);
3915 return TRUE;
3916 }
3917
3918 static bfd_boolean
3919 bfd_mach_o_read_twolevel_hints (bfd *abfd,
3920 bfd_mach_o_load_command *command)
3921 {
3922 bfd_mach_o_twolevel_hints_command *cmd = &command->command.twolevel_hints;
3923 struct mach_o_twolevel_hints_command_external raw;
3924
3925 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3926 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3927 return FALSE;
3928
3929 cmd->offset = bfd_get_32 (abfd, raw.offset);
3930 cmd->nhints = bfd_get_32 (abfd, raw.nhints);
3931 return TRUE;
3932 }
3933
3934 static bfd_boolean
3935 bfd_mach_o_read_fvmlib (bfd *abfd, bfd_mach_o_load_command *command)
3936 {
3937 bfd_mach_o_fvmlib_command *fvm = &command->command.fvmlib;
3938 struct mach_o_fvmlib_command_external raw;
3939 unsigned int nameoff;
3940 unsigned int namelen;
3941
3942 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3943 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3944 return FALSE;
3945
3946 nameoff = bfd_h_get_32 (abfd, raw.name);
3947 fvm->minor_version = bfd_h_get_32 (abfd, raw.minor_version);
3948 fvm->header_addr = bfd_h_get_32 (abfd, raw.header_addr);
3949
3950 fvm->name_offset = command->offset + nameoff;
3951 namelen = command->len - nameoff;
3952 fvm->name_str = bfd_alloc (abfd, namelen);
3953 if (fvm->name_str == NULL)
3954 return FALSE;
3955 if (bfd_seek (abfd, fvm->name_offset, SEEK_SET) != 0
3956 || bfd_bread (fvm->name_str, namelen, abfd) != namelen)
3957 return FALSE;
3958 return TRUE;
3959 }
3960
3961 static bfd_boolean
3962 bfd_mach_o_read_thread (bfd *abfd, bfd_mach_o_load_command *command)
3963 {
3964 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3965 bfd_mach_o_thread_command *cmd = &command->command.thread;
3966 unsigned int offset;
3967 unsigned int nflavours;
3968 unsigned int i;
3969
3970 BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD)
3971 || (command->type == BFD_MACH_O_LC_UNIXTHREAD));
3972
3973 /* Count the number of threads. */
3974 offset = 8;
3975 nflavours = 0;
3976 while (offset != command->len)
3977 {
3978 struct mach_o_thread_command_external raw;
3979
3980 if (offset >= command->len)
3981 return FALSE;
3982
3983 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
3984 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3985 return FALSE;
3986
3987 offset += sizeof (raw) + bfd_h_get_32 (abfd, raw.count) * 4;
3988 nflavours++;
3989 }
3990
3991 /* Allocate threads. */
3992 cmd->flavours = bfd_alloc
3993 (abfd, nflavours * sizeof (bfd_mach_o_thread_flavour));
3994 if (cmd->flavours == NULL)
3995 return FALSE;
3996 cmd->nflavours = nflavours;
3997
3998 offset = 8;
3999 nflavours = 0;
4000 while (offset != command->len)
4001 {
4002 struct mach_o_thread_command_external raw;
4003
4004 if (offset >= command->len)
4005 return FALSE;
4006
4007 if (nflavours >= cmd->nflavours)
4008 return FALSE;
4009
4010 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
4011 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4012 return FALSE;
4013
4014 cmd->flavours[nflavours].flavour = bfd_h_get_32 (abfd, raw.flavour);
4015 cmd->flavours[nflavours].offset = command->offset + offset + sizeof (raw);
4016 cmd->flavours[nflavours].size = bfd_h_get_32 (abfd, raw.count) * 4;
4017 offset += cmd->flavours[nflavours].size + sizeof (raw);
4018 nflavours++;
4019 }
4020
4021 for (i = 0; i < nflavours; i++)
4022 {
4023 asection *bfdsec;
4024 unsigned int snamelen;
4025 char *sname;
4026 const char *flavourstr;
4027 const char *prefix = "LC_THREAD";
4028 unsigned int j = 0;
4029
4030 switch (mdata->header.cputype)
4031 {
4032 case BFD_MACH_O_CPU_TYPE_POWERPC:
4033 case BFD_MACH_O_CPU_TYPE_POWERPC_64:
4034 flavourstr =
4035 bfd_mach_o_ppc_flavour_string (cmd->flavours[i].flavour);
4036 break;
4037 case BFD_MACH_O_CPU_TYPE_I386:
4038 case BFD_MACH_O_CPU_TYPE_X86_64:
4039 flavourstr =
4040 bfd_mach_o_i386_flavour_string (cmd->flavours[i].flavour);
4041 break;
4042 default:
4043 flavourstr = "UNKNOWN_ARCHITECTURE";
4044 break;
4045 }
4046
4047 snamelen = strlen (prefix) + 1 + 20 + 1 + strlen (flavourstr) + 1;
4048 sname = bfd_alloc (abfd, snamelen);
4049 if (sname == NULL)
4050 return FALSE;
4051
4052 for (;;)
4053 {
4054 sprintf (sname, "%s.%s.%u", prefix, flavourstr, j);
4055 if (bfd_get_section_by_name (abfd, sname) == NULL)
4056 break;
4057 j++;
4058 }
4059
4060 bfdsec = bfd_make_section_with_flags (abfd, sname, SEC_HAS_CONTENTS);
4061
4062 bfdsec->vma = 0;
4063 bfdsec->lma = 0;
4064 bfdsec->size = cmd->flavours[i].size;
4065 bfdsec->filepos = cmd->flavours[i].offset;
4066 bfdsec->alignment_power = 0x0;
4067
4068 cmd->section = bfdsec;
4069 }
4070
4071 return TRUE;
4072 }
4073
4074 static bfd_boolean
4075 bfd_mach_o_read_dysymtab (bfd *abfd, bfd_mach_o_load_command *command)
4076 {
4077 bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab;
4078 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4079
4080 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB);
4081
4082 {
4083 struct mach_o_dysymtab_command_external raw;
4084
4085 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4086 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4087 return FALSE;
4088
4089 cmd->ilocalsym = bfd_h_get_32 (abfd, raw.ilocalsym);
4090 cmd->nlocalsym = bfd_h_get_32 (abfd, raw.nlocalsym);
4091 cmd->iextdefsym = bfd_h_get_32 (abfd, raw.iextdefsym);
4092 cmd->nextdefsym = bfd_h_get_32 (abfd, raw.nextdefsym);
4093 cmd->iundefsym = bfd_h_get_32 (abfd, raw.iundefsym);
4094 cmd->nundefsym = bfd_h_get_32 (abfd, raw.nundefsym);
4095 cmd->tocoff = bfd_h_get_32 (abfd, raw.tocoff);
4096 cmd->ntoc = bfd_h_get_32 (abfd, raw.ntoc);
4097 cmd->modtaboff = bfd_h_get_32 (abfd, raw.modtaboff);
4098 cmd->nmodtab = bfd_h_get_32 (abfd, raw.nmodtab);
4099 cmd->extrefsymoff = bfd_h_get_32 (abfd, raw.extrefsymoff);
4100 cmd->nextrefsyms = bfd_h_get_32 (abfd, raw.nextrefsyms);
4101 cmd->indirectsymoff = bfd_h_get_32 (abfd, raw.indirectsymoff);
4102 cmd->nindirectsyms = bfd_h_get_32 (abfd, raw.nindirectsyms);
4103 cmd->extreloff = bfd_h_get_32 (abfd, raw.extreloff);
4104 cmd->nextrel = bfd_h_get_32 (abfd, raw.nextrel);
4105 cmd->locreloff = bfd_h_get_32 (abfd, raw.locreloff);
4106 cmd->nlocrel = bfd_h_get_32 (abfd, raw.nlocrel);
4107 }
4108
4109 if (cmd->nmodtab != 0)
4110 {
4111 unsigned int i;
4112 int wide = bfd_mach_o_wide_p (abfd);
4113 unsigned int module_len = wide ? 56 : 52;
4114
4115 cmd->dylib_module =
4116 bfd_alloc (abfd, cmd->nmodtab * sizeof (bfd_mach_o_dylib_module));
4117 if (cmd->dylib_module == NULL)
4118 return FALSE;
4119
4120 if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0)
4121 return FALSE;
4122
4123 for (i = 0; i < cmd->nmodtab; i++)
4124 {
4125 bfd_mach_o_dylib_module *module = &cmd->dylib_module[i];
4126 unsigned long v;
4127 unsigned char buf[56];
4128
4129 if (bfd_bread ((void *) buf, module_len, abfd) != module_len)
4130 return FALSE;
4131
4132 module->module_name_idx = bfd_h_get_32 (abfd, buf + 0);
4133 module->iextdefsym = bfd_h_get_32 (abfd, buf + 4);
4134 module->nextdefsym = bfd_h_get_32 (abfd, buf + 8);
4135 module->irefsym = bfd_h_get_32 (abfd, buf + 12);
4136 module->nrefsym = bfd_h_get_32 (abfd, buf + 16);
4137 module->ilocalsym = bfd_h_get_32 (abfd, buf + 20);
4138 module->nlocalsym = bfd_h_get_32 (abfd, buf + 24);
4139 module->iextrel = bfd_h_get_32 (abfd, buf + 28);
4140 module->nextrel = bfd_h_get_32 (abfd, buf + 32);
4141 v = bfd_h_get_32 (abfd, buf +36);
4142 module->iinit = v & 0xffff;
4143 module->iterm = (v >> 16) & 0xffff;
4144 v = bfd_h_get_32 (abfd, buf + 40);
4145 module->ninit = v & 0xffff;
4146 module->nterm = (v >> 16) & 0xffff;
4147 if (wide)
4148 {
4149 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 44);
4150 module->objc_module_info_addr = bfd_h_get_64 (abfd, buf + 48);
4151 }
4152 else
4153 {
4154 module->objc_module_info_addr = bfd_h_get_32 (abfd, buf + 44);
4155 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 48);
4156 }
4157 }
4158 }
4159
4160 if (cmd->ntoc != 0)
4161 {
4162 unsigned int i;
4163
4164 cmd->dylib_toc = bfd_alloc
4165 (abfd, cmd->ntoc * sizeof (bfd_mach_o_dylib_table_of_content));
4166 if (cmd->dylib_toc == NULL)
4167 return FALSE;
4168
4169 if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0)
4170 return FALSE;
4171
4172 for (i = 0; i < cmd->ntoc; i++)
4173 {
4174 struct mach_o_dylib_table_of_contents_external raw;
4175 bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i];
4176
4177 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4178 return FALSE;
4179
4180 toc->symbol_index = bfd_h_get_32 (abfd, raw.symbol_index);
4181 toc->module_index = bfd_h_get_32 (abfd, raw.module_index);
4182 }
4183 }
4184
4185 if (cmd->nindirectsyms != 0)
4186 {
4187 unsigned int i;
4188
4189 cmd->indirect_syms = bfd_alloc
4190 (abfd, cmd->nindirectsyms * sizeof (unsigned int));
4191 if (cmd->indirect_syms == NULL)
4192 return FALSE;
4193
4194 if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0)
4195 return FALSE;
4196
4197 for (i = 0; i < cmd->nindirectsyms; i++)
4198 {
4199 unsigned char raw[4];
4200 unsigned int *is = &cmd->indirect_syms[i];
4201
4202 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw))
4203 return FALSE;
4204
4205 *is = bfd_h_get_32 (abfd, raw);
4206 }
4207 }
4208
4209 if (cmd->nextrefsyms != 0)
4210 {
4211 unsigned long v;
4212 unsigned int i;
4213
4214 cmd->ext_refs = bfd_alloc
4215 (abfd, cmd->nextrefsyms * sizeof (bfd_mach_o_dylib_reference));
4216 if (cmd->ext_refs == NULL)
4217 return FALSE;
4218
4219 if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0)
4220 return FALSE;
4221
4222 for (i = 0; i < cmd->nextrefsyms; i++)
4223 {
4224 unsigned char raw[4];
4225 bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i];
4226
4227 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw))
4228 return FALSE;
4229
4230 /* Fields isym and flags are written as bit-fields, thus we need
4231 a specific processing for endianness. */
4232 v = bfd_h_get_32 (abfd, raw);
4233 if (bfd_big_endian (abfd))
4234 {
4235 ref->isym = (v >> 8) & 0xffffff;
4236 ref->flags = v & 0xff;
4237 }
4238 else
4239 {
4240 ref->isym = v & 0xffffff;
4241 ref->flags = (v >> 24) & 0xff;
4242 }
4243 }
4244 }
4245
4246 if (mdata->dysymtab)
4247 return FALSE;
4248 mdata->dysymtab = cmd;
4249
4250 return TRUE;
4251 }
4252
4253 static bfd_boolean
4254 bfd_mach_o_read_symtab (bfd *abfd, bfd_mach_o_load_command *command)
4255 {
4256 bfd_mach_o_symtab_command *symtab = &command->command.symtab;
4257 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4258 struct mach_o_symtab_command_external raw;
4259
4260 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB);
4261
4262 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4263 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4264 return FALSE;
4265
4266 symtab->symoff = bfd_h_get_32 (abfd, raw.symoff);
4267 symtab->nsyms = bfd_h_get_32 (abfd, raw.nsyms);
4268 symtab->stroff = bfd_h_get_32 (abfd, raw.stroff);
4269 symtab->strsize = bfd_h_get_32 (abfd, raw.strsize);
4270 symtab->symbols = NULL;
4271 symtab->strtab = NULL;
4272
4273 if (symtab->nsyms != 0)
4274 abfd->flags |= HAS_SYMS;
4275
4276 if (mdata->symtab)
4277 return FALSE;
4278 mdata->symtab = symtab;
4279 return TRUE;
4280 }
4281
4282 static bfd_boolean
4283 bfd_mach_o_read_uuid (bfd *abfd, bfd_mach_o_load_command *command)
4284 {
4285 bfd_mach_o_uuid_command *cmd = &command->command.uuid;
4286
4287 BFD_ASSERT (command->type == BFD_MACH_O_LC_UUID);
4288
4289 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4290 || bfd_bread (cmd->uuid, 16, abfd) != 16)
4291 return FALSE;
4292
4293 return TRUE;
4294 }
4295
4296 static bfd_boolean
4297 bfd_mach_o_read_linkedit (bfd *abfd, bfd_mach_o_load_command *command)
4298 {
4299 bfd_mach_o_linkedit_command *cmd = &command->command.linkedit;
4300 struct mach_o_linkedit_data_command_external raw;
4301
4302 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4303 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4304 return FALSE;
4305
4306 cmd->dataoff = bfd_get_32 (abfd, raw.dataoff);
4307 cmd->datasize = bfd_get_32 (abfd, raw.datasize);
4308 return TRUE;
4309 }
4310
4311 static bfd_boolean
4312 bfd_mach_o_read_str (bfd *abfd, bfd_mach_o_load_command *command)
4313 {
4314 bfd_mach_o_str_command *cmd = &command->command.str;
4315 struct mach_o_str_command_external raw;
4316 unsigned long off;
4317
4318 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4319 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4320 return FALSE;
4321
4322 off = bfd_get_32 (abfd, raw.str);
4323 cmd->stroff = command->offset + off;
4324 cmd->str_len = command->len - off;
4325 cmd->str = bfd_alloc (abfd, cmd->str_len);
4326 if (cmd->str == NULL)
4327 return FALSE;
4328 if (bfd_seek (abfd, cmd->stroff, SEEK_SET) != 0
4329 || bfd_bread ((void *) cmd->str, cmd->str_len, abfd) != cmd->str_len)
4330 return FALSE;
4331 return TRUE;
4332 }
4333
4334 static unsigned char *
4335 bfd_mach_o_alloc_and_read (bfd *abfd, unsigned int off, unsigned int size)
4336 {
4337 unsigned char *buf;
4338
4339 buf = bfd_alloc (abfd, size);
4340 if (buf == NULL)
4341 return NULL;
4342 if (bfd_seek (abfd, off, SEEK_SET) != 0
4343 || bfd_bread (buf, size, abfd) != size)
4344 return NULL;
4345 return buf;
4346 }
4347
4348 static bfd_boolean
4349 bfd_mach_o_read_dyld_content (bfd *abfd, bfd_mach_o_dyld_info_command *cmd)
4350 {
4351 /* Read rebase content. */
4352 if (cmd->rebase_content == NULL && cmd->rebase_size != 0)
4353 {
4354 cmd->rebase_content =
4355 bfd_mach_o_alloc_and_read (abfd, cmd->rebase_off, cmd->rebase_size);
4356 if (cmd->rebase_content == NULL)
4357 return FALSE;
4358 }
4359
4360 /* Read bind content. */
4361 if (cmd->bind_content == NULL && cmd->bind_size != 0)
4362 {
4363 cmd->bind_content =
4364 bfd_mach_o_alloc_and_read (abfd, cmd->bind_off, cmd->bind_size);
4365 if (cmd->bind_content == NULL)
4366 return FALSE;
4367 }
4368
4369 /* Read weak bind content. */
4370 if (cmd->weak_bind_content == NULL && cmd->weak_bind_size != 0)
4371 {
4372 cmd->weak_bind_content = bfd_mach_o_alloc_and_read
4373 (abfd, cmd->weak_bind_off, cmd->weak_bind_size);
4374 if (cmd->weak_bind_content == NULL)
4375 return FALSE;
4376 }
4377
4378 /* Read lazy bind content. */
4379 if (cmd->lazy_bind_content == NULL && cmd->lazy_bind_size != 0)
4380 {
4381 cmd->lazy_bind_content = bfd_mach_o_alloc_and_read
4382 (abfd, cmd->lazy_bind_off, cmd->lazy_bind_size);
4383 if (cmd->lazy_bind_content == NULL)
4384 return FALSE;
4385 }
4386
4387 /* Read export content. */
4388 if (cmd->export_content == NULL && cmd->export_size != 0)
4389 {
4390 cmd->export_content = bfd_mach_o_alloc_and_read
4391 (abfd, cmd->export_off, cmd->export_size);
4392 if (cmd->export_content == NULL)
4393 return FALSE;
4394 }
4395
4396 return TRUE;
4397 }
4398
4399 static bfd_boolean
4400 bfd_mach_o_read_dyld_info (bfd *abfd, bfd_mach_o_load_command *command)
4401 {
4402 bfd_mach_o_dyld_info_command *cmd = &command->command.dyld_info;
4403 struct mach_o_dyld_info_command_external raw;
4404
4405 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4406 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4407 return FALSE;
4408
4409 cmd->rebase_off = bfd_get_32 (abfd, raw.rebase_off);
4410 cmd->rebase_size = bfd_get_32 (abfd, raw.rebase_size);
4411 cmd->rebase_content = NULL;
4412 cmd->bind_off = bfd_get_32 (abfd, raw.bind_off);
4413 cmd->bind_size = bfd_get_32 (abfd, raw.bind_size);
4414 cmd->bind_content = NULL;
4415 cmd->weak_bind_off = bfd_get_32 (abfd, raw.weak_bind_off);
4416 cmd->weak_bind_size = bfd_get_32 (abfd, raw.weak_bind_size);
4417 cmd->weak_bind_content = NULL;
4418 cmd->lazy_bind_off = bfd_get_32 (abfd, raw.lazy_bind_off);
4419 cmd->lazy_bind_size = bfd_get_32 (abfd, raw.lazy_bind_size);
4420 cmd->lazy_bind_content = NULL;
4421 cmd->export_off = bfd_get_32 (abfd, raw.export_off);
4422 cmd->export_size = bfd_get_32 (abfd, raw.export_size);
4423 cmd->export_content = NULL;
4424 return TRUE;
4425 }
4426
4427 static bfd_boolean
4428 bfd_mach_o_read_version_min (bfd *abfd, bfd_mach_o_load_command *command)
4429 {
4430 bfd_mach_o_version_min_command *cmd = &command->command.version_min;
4431 struct mach_o_version_min_command_external raw;
4432 unsigned int ver;
4433
4434 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4435 || 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_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4453 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4454 return FALSE;
4455
4456 cmd->cryptoff = bfd_get_32 (abfd, raw.cryptoff);
4457 cmd->cryptsize = bfd_get_32 (abfd, raw.cryptsize);
4458 cmd->cryptid = bfd_get_32 (abfd, raw.cryptid);
4459 return TRUE;
4460 }
4461
4462 static bfd_boolean
4463 bfd_mach_o_read_main (bfd *abfd, bfd_mach_o_load_command *command)
4464 {
4465 bfd_mach_o_main_command *cmd = &command->command.main;
4466 struct mach_o_entry_point_command_external raw;
4467
4468 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4469 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4470 return FALSE;
4471
4472 cmd->entryoff = bfd_get_64 (abfd, raw.entryoff);
4473 cmd->stacksize = bfd_get_64 (abfd, raw.stacksize);
4474 return TRUE;
4475 }
4476
4477 static bfd_boolean
4478 bfd_mach_o_read_source_version (bfd *abfd, bfd_mach_o_load_command *command)
4479 {
4480 bfd_mach_o_source_version_command *cmd = &command->command.source_version;
4481 struct mach_o_source_version_command_external raw;
4482 bfd_uint64_t ver;
4483
4484 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4485 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4486 return FALSE;
4487
4488 ver = bfd_get_64 (abfd, raw.version);
4489 /* Note: we use a serie of shift to avoid shift > 32 (for which gcc
4490 generates warnings) in case of the host doesn't support 64 bit
4491 integers. */
4492 cmd->e = ver & 0x3ff;
4493 ver >>= 10;
4494 cmd->d = ver & 0x3ff;
4495 ver >>= 10;
4496 cmd->c = ver & 0x3ff;
4497 ver >>= 10;
4498 cmd->b = ver & 0x3ff;
4499 ver >>= 10;
4500 cmd->a = ver & 0xffffff;
4501 return TRUE;
4502 }
4503
4504 static bfd_boolean
4505 bfd_mach_o_read_segment (bfd *abfd,
4506 bfd_mach_o_load_command *command,
4507 unsigned int wide)
4508 {
4509 bfd_mach_o_segment_command *seg = &command->command.segment;
4510 unsigned long i;
4511
4512 if (wide)
4513 {
4514 struct mach_o_segment_command_64_external raw;
4515
4516 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64);
4517
4518 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4519 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4520 return FALSE;
4521
4522 memcpy (seg->segname, raw.segname, 16);
4523 seg->segname[16] = '\0';
4524
4525 seg->vmaddr = bfd_h_get_64 (abfd, raw.vmaddr);
4526 seg->vmsize = bfd_h_get_64 (abfd, raw.vmsize);
4527 seg->fileoff = bfd_h_get_64 (abfd, raw.fileoff);
4528 seg->filesize = bfd_h_get_64 (abfd, raw.filesize);
4529 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot);
4530 seg->initprot = bfd_h_get_32 (abfd, raw.initprot);
4531 seg->nsects = bfd_h_get_32 (abfd, raw.nsects);
4532 seg->flags = bfd_h_get_32 (abfd, raw.flags);
4533 }
4534 else
4535 {
4536 struct mach_o_segment_command_32_external raw;
4537
4538 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT);
4539
4540 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4541 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4542 return FALSE;
4543
4544 memcpy (seg->segname, raw.segname, 16);
4545 seg->segname[16] = '\0';
4546
4547 seg->vmaddr = bfd_h_get_32 (abfd, raw.vmaddr);
4548 seg->vmsize = bfd_h_get_32 (abfd, raw.vmsize);
4549 seg->fileoff = bfd_h_get_32 (abfd, raw.fileoff);
4550 seg->filesize = bfd_h_get_32 (abfd, raw.filesize);
4551 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot);
4552 seg->initprot = bfd_h_get_32 (abfd, raw.initprot);
4553 seg->nsects = bfd_h_get_32 (abfd, raw.nsects);
4554 seg->flags = bfd_h_get_32 (abfd, raw.flags);
4555 }
4556 seg->sect_head = NULL;
4557 seg->sect_tail = NULL;
4558
4559 for (i = 0; i < seg->nsects; i++)
4560 {
4561 bfd_vma segoff;
4562 asection *sec;
4563
4564 if (wide)
4565 segoff = command->offset + BFD_MACH_O_LC_SEGMENT_64_SIZE
4566 + (i * BFD_MACH_O_SECTION_64_SIZE);
4567 else
4568 segoff = command->offset + BFD_MACH_O_LC_SEGMENT_SIZE
4569 + (i * BFD_MACH_O_SECTION_SIZE);
4570
4571 sec = bfd_mach_o_read_section (abfd, segoff, seg->initprot, wide);
4572 if (sec == NULL)
4573 return FALSE;
4574
4575 bfd_mach_o_append_section_to_segment
4576 (seg, bfd_mach_o_get_mach_o_section (sec));
4577 }
4578
4579 return TRUE;
4580 }
4581
4582 static bfd_boolean
4583 bfd_mach_o_read_segment_32 (bfd *abfd, bfd_mach_o_load_command *command)
4584 {
4585 return bfd_mach_o_read_segment (abfd, command, 0);
4586 }
4587
4588 static bfd_boolean
4589 bfd_mach_o_read_segment_64 (bfd *abfd, bfd_mach_o_load_command *command)
4590 {
4591 return bfd_mach_o_read_segment (abfd, command, 1);
4592 }
4593
4594 static bfd_boolean
4595 bfd_mach_o_read_command (bfd *abfd, bfd_mach_o_load_command *command)
4596 {
4597 struct mach_o_load_command_external raw;
4598 unsigned int cmd;
4599
4600 /* Read command type and length. */
4601 if (bfd_seek (abfd, command->offset, SEEK_SET) != 0
4602 || bfd_bread (&raw, BFD_MACH_O_LC_SIZE, abfd) != BFD_MACH_O_LC_SIZE)
4603 return FALSE;
4604
4605 cmd = bfd_h_get_32 (abfd, raw.cmd);
4606 command->type = cmd & ~BFD_MACH_O_LC_REQ_DYLD;
4607 command->type_required = cmd & BFD_MACH_O_LC_REQ_DYLD ? TRUE : FALSE;
4608 command->len = bfd_h_get_32 (abfd, raw.cmdsize);
4609
4610 switch (command->type)
4611 {
4612 case BFD_MACH_O_LC_SEGMENT:
4613 if (!bfd_mach_o_read_segment_32 (abfd, command))
4614 return FALSE;
4615 break;
4616 case BFD_MACH_O_LC_SEGMENT_64:
4617 if (!bfd_mach_o_read_segment_64 (abfd, command))
4618 return FALSE;
4619 break;
4620 case BFD_MACH_O_LC_SYMTAB:
4621 if (!bfd_mach_o_read_symtab (abfd, command))
4622 return FALSE;
4623 break;
4624 case BFD_MACH_O_LC_SYMSEG:
4625 break;
4626 case BFD_MACH_O_LC_THREAD:
4627 case BFD_MACH_O_LC_UNIXTHREAD:
4628 if (!bfd_mach_o_read_thread (abfd, command))
4629 return FALSE;
4630 break;
4631 case BFD_MACH_O_LC_LOAD_DYLINKER:
4632 case BFD_MACH_O_LC_ID_DYLINKER:
4633 case BFD_MACH_O_LC_DYLD_ENVIRONMENT:
4634 if (!bfd_mach_o_read_dylinker (abfd, command))
4635 return FALSE;
4636 break;
4637 case BFD_MACH_O_LC_LOAD_DYLIB:
4638 case BFD_MACH_O_LC_LAZY_LOAD_DYLIB:
4639 case BFD_MACH_O_LC_ID_DYLIB:
4640 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
4641 case BFD_MACH_O_LC_REEXPORT_DYLIB:
4642 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
4643 if (!bfd_mach_o_read_dylib (abfd, command))
4644 return FALSE;
4645 break;
4646 case BFD_MACH_O_LC_PREBOUND_DYLIB:
4647 if (!bfd_mach_o_read_prebound_dylib (abfd, command))
4648 return FALSE;
4649 break;
4650 case BFD_MACH_O_LC_LOADFVMLIB:
4651 case BFD_MACH_O_LC_IDFVMLIB:
4652 if (!bfd_mach_o_read_fvmlib (abfd, command))
4653 return FALSE;
4654 break;
4655 case BFD_MACH_O_LC_IDENT:
4656 case BFD_MACH_O_LC_FVMFILE:
4657 case BFD_MACH_O_LC_PREPAGE:
4658 case BFD_MACH_O_LC_ROUTINES:
4659 case BFD_MACH_O_LC_ROUTINES_64:
4660 break;
4661 case BFD_MACH_O_LC_SUB_FRAMEWORK:
4662 case BFD_MACH_O_LC_SUB_UMBRELLA:
4663 case BFD_MACH_O_LC_SUB_LIBRARY:
4664 case BFD_MACH_O_LC_SUB_CLIENT:
4665 case BFD_MACH_O_LC_RPATH:
4666 if (!bfd_mach_o_read_str (abfd, command))
4667 return FALSE;
4668 break;
4669 case BFD_MACH_O_LC_DYSYMTAB:
4670 if (!bfd_mach_o_read_dysymtab (abfd, command))
4671 return FALSE;
4672 break;
4673 case BFD_MACH_O_LC_PREBIND_CKSUM:
4674 if (!bfd_mach_o_read_prebind_cksum (abfd, command))
4675 return FALSE;
4676 break;
4677 case BFD_MACH_O_LC_TWOLEVEL_HINTS:
4678 if (!bfd_mach_o_read_twolevel_hints (abfd, command))
4679 return FALSE;
4680 break;
4681 case BFD_MACH_O_LC_UUID:
4682 if (!bfd_mach_o_read_uuid (abfd, command))
4683 return FALSE;
4684 break;
4685 case BFD_MACH_O_LC_CODE_SIGNATURE:
4686 case BFD_MACH_O_LC_SEGMENT_SPLIT_INFO:
4687 case BFD_MACH_O_LC_FUNCTION_STARTS:
4688 case BFD_MACH_O_LC_DATA_IN_CODE:
4689 case BFD_MACH_O_LC_DYLIB_CODE_SIGN_DRS:
4690 if (!bfd_mach_o_read_linkedit (abfd, command))
4691 return FALSE;
4692 break;
4693 case BFD_MACH_O_LC_ENCRYPTION_INFO:
4694 if (!bfd_mach_o_read_encryption_info (abfd, command))
4695 return FALSE;
4696 break;
4697 case BFD_MACH_O_LC_DYLD_INFO:
4698 if (!bfd_mach_o_read_dyld_info (abfd, command))
4699 return FALSE;
4700 break;
4701 case BFD_MACH_O_LC_VERSION_MIN_MACOSX:
4702 case BFD_MACH_O_LC_VERSION_MIN_IPHONEOS:
4703 if (!bfd_mach_o_read_version_min (abfd, command))
4704 return FALSE;
4705 break;
4706 case BFD_MACH_O_LC_MAIN:
4707 if (!bfd_mach_o_read_main (abfd, command))
4708 return FALSE;
4709 break;
4710 case BFD_MACH_O_LC_SOURCE_VERSION:
4711 if (!bfd_mach_o_read_source_version (abfd, command))
4712 return FALSE;
4713 break;
4714 default:
4715 command->len = 0;
4716 (*_bfd_error_handler)(_("%B: unknown load command 0x%lx"),
4717 abfd, (unsigned long) command->type);
4718 return FALSE;
4719 }
4720
4721 return TRUE;
4722 }
4723
4724 static void
4725 bfd_mach_o_flatten_sections (bfd *abfd)
4726 {
4727 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4728 bfd_mach_o_load_command *cmd;
4729 long csect = 0;
4730
4731 /* Count total number of sections. */
4732 mdata->nsects = 0;
4733
4734 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
4735 {
4736 if (cmd->type == BFD_MACH_O_LC_SEGMENT
4737 || cmd->type == BFD_MACH_O_LC_SEGMENT_64)
4738 {
4739 bfd_mach_o_segment_command *seg = &cmd->command.segment;
4740
4741 mdata->nsects += seg->nsects;
4742 }
4743 }
4744
4745 /* Allocate sections array. */
4746 mdata->sections = bfd_alloc (abfd,
4747 mdata->nsects * sizeof (bfd_mach_o_section *));
4748
4749 /* Fill the array. */
4750 csect = 0;
4751
4752 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
4753 {
4754 if (cmd->type == BFD_MACH_O_LC_SEGMENT
4755 || cmd->type == BFD_MACH_O_LC_SEGMENT_64)
4756 {
4757 bfd_mach_o_segment_command *seg = &cmd->command.segment;
4758 bfd_mach_o_section *sec;
4759
4760 BFD_ASSERT (csect + seg->nsects <= mdata->nsects);
4761
4762 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
4763 mdata->sections[csect++] = sec;
4764 }
4765 }
4766 }
4767
4768 static bfd_boolean
4769 bfd_mach_o_scan_start_address (bfd *abfd)
4770 {
4771 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4772 bfd_mach_o_thread_command *thr = NULL;
4773 bfd_mach_o_load_command *cmd;
4774 unsigned long i;
4775
4776 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
4777 if (cmd->type == BFD_MACH_O_LC_THREAD
4778 || cmd->type == BFD_MACH_O_LC_UNIXTHREAD)
4779 {
4780 thr = &cmd->command.thread;
4781 break;
4782 }
4783 else if (cmd->type == BFD_MACH_O_LC_MAIN && mdata->nsects > 1)
4784 {
4785 bfd_mach_o_main_command *main_cmd = &cmd->command.main;
4786 bfd_mach_o_section *text_sect = mdata->sections[0];
4787
4788 if (text_sect)
4789 {
4790 abfd->start_address = main_cmd->entryoff
4791 + (text_sect->addr - text_sect->offset);
4792 return TRUE;
4793 }
4794 }
4795
4796 /* An object file has no start address, so do not fail if not found. */
4797 if (thr == NULL)
4798 return TRUE;
4799
4800 /* FIXME: create a subtarget hook ? */
4801 for (i = 0; i < thr->nflavours; i++)
4802 {
4803 if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_I386)
4804 && (thr->flavours[i].flavour == BFD_MACH_O_x86_THREAD_STATE32))
4805 {
4806 unsigned char buf[4];
4807
4808 if (bfd_seek (abfd, thr->flavours[i].offset + 40, SEEK_SET) != 0
4809 || bfd_bread (buf, 4, abfd) != 4)
4810 return FALSE;
4811
4812 abfd->start_address = bfd_h_get_32 (abfd, buf);
4813 }
4814 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC)
4815 && (thr->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE))
4816 {
4817 unsigned char buf[4];
4818
4819 if (bfd_seek (abfd, thr->flavours[i].offset + 0, SEEK_SET) != 0
4820 || bfd_bread (buf, 4, abfd) != 4)
4821 return FALSE;
4822
4823 abfd->start_address = bfd_h_get_32 (abfd, buf);
4824 }
4825 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC_64)
4826 && (thr->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE64))
4827 {
4828 unsigned char buf[8];
4829
4830 if (bfd_seek (abfd, thr->flavours[i].offset + 0, SEEK_SET) != 0
4831 || bfd_bread (buf, 8, abfd) != 8)
4832 return FALSE;
4833
4834 abfd->start_address = bfd_h_get_64 (abfd, buf);
4835 }
4836 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_X86_64)
4837 && (thr->flavours[i].flavour == BFD_MACH_O_x86_THREAD_STATE64))
4838 {
4839 unsigned char buf[8];
4840
4841 if (bfd_seek (abfd, thr->flavours[i].offset + (16 * 8), SEEK_SET) != 0
4842 || bfd_bread (buf, 8, abfd) != 8)
4843 return FALSE;
4844
4845 abfd->start_address = bfd_h_get_64 (abfd, buf);
4846 }
4847 }
4848
4849 return TRUE;
4850 }
4851
4852 bfd_boolean
4853 bfd_mach_o_set_arch_mach (bfd *abfd,
4854 enum bfd_architecture arch,
4855 unsigned long machine)
4856 {
4857 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
4858
4859 /* If this isn't the right architecture for this backend, and this
4860 isn't the generic backend, fail. */
4861 if (arch != bed->arch
4862 && arch != bfd_arch_unknown
4863 && bed->arch != bfd_arch_unknown)
4864 return FALSE;
4865
4866 return bfd_default_set_arch_mach (abfd, arch, machine);
4867 }
4868
4869 static bfd_boolean
4870 bfd_mach_o_scan (bfd *abfd,
4871 bfd_mach_o_header *header,
4872 bfd_mach_o_data_struct *mdata)
4873 {
4874 unsigned int i;
4875 enum bfd_architecture cputype;
4876 unsigned long cpusubtype;
4877 unsigned int hdrsize;
4878
4879 hdrsize = mach_o_wide_p (header) ?
4880 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
4881
4882 mdata->header = *header;
4883
4884 abfd->flags = abfd->flags & BFD_IN_MEMORY;
4885 switch (header->filetype)
4886 {
4887 case BFD_MACH_O_MH_OBJECT:
4888 abfd->flags |= HAS_RELOC;
4889 break;
4890 case BFD_MACH_O_MH_EXECUTE:
4891 abfd->flags |= EXEC_P;
4892 break;
4893 case BFD_MACH_O_MH_DYLIB:
4894 case BFD_MACH_O_MH_BUNDLE:
4895 abfd->flags |= DYNAMIC;
4896 break;
4897 }
4898
4899 abfd->tdata.mach_o_data = mdata;
4900
4901 bfd_mach_o_convert_architecture (header->cputype, header->cpusubtype,
4902 &cputype, &cpusubtype);
4903 if (cputype == bfd_arch_unknown)
4904 {
4905 (*_bfd_error_handler)
4906 (_("bfd_mach_o_scan: unknown architecture 0x%lx/0x%lx"),
4907 header->cputype, header->cpusubtype);
4908 return FALSE;
4909 }
4910
4911 bfd_set_arch_mach (abfd, cputype, cpusubtype);
4912
4913 if (header->ncmds != 0)
4914 {
4915 bfd_mach_o_load_command *cmd;
4916
4917 mdata->first_command = NULL;
4918 mdata->last_command = NULL;
4919 cmd = bfd_alloc (abfd, header->ncmds * sizeof (bfd_mach_o_load_command));
4920 if (cmd == NULL)
4921 return FALSE;
4922
4923 for (i = 0; i < header->ncmds; i++)
4924 {
4925 bfd_mach_o_load_command *cur = &cmd[i];
4926
4927 bfd_mach_o_append_command (abfd, cur);
4928
4929 if (i == 0)
4930 cur->offset = hdrsize;
4931 else
4932 {
4933 bfd_mach_o_load_command *prev = &cmd[i - 1];
4934 cur->offset = prev->offset + prev->len;
4935 }
4936
4937 if (!bfd_mach_o_read_command (abfd, cur))
4938 return FALSE;
4939 }
4940 }
4941
4942 /* Sections should be flatten before scanning start address. */
4943 bfd_mach_o_flatten_sections (abfd);
4944 if (!bfd_mach_o_scan_start_address (abfd))
4945 return FALSE;
4946
4947 return TRUE;
4948 }
4949
4950 bfd_boolean
4951 bfd_mach_o_mkobject_init (bfd *abfd)
4952 {
4953 bfd_mach_o_data_struct *mdata = NULL;
4954
4955 mdata = bfd_zalloc (abfd, sizeof (bfd_mach_o_data_struct));
4956 if (mdata == NULL)
4957 return FALSE;
4958 abfd->tdata.mach_o_data = mdata;
4959
4960 mdata->header.magic = 0;
4961 mdata->header.cputype = 0;
4962 mdata->header.cpusubtype = 0;
4963 mdata->header.filetype = 0;
4964 mdata->header.ncmds = 0;
4965 mdata->header.sizeofcmds = 0;
4966 mdata->header.flags = 0;
4967 mdata->header.byteorder = BFD_ENDIAN_UNKNOWN;
4968 mdata->first_command = NULL;
4969 mdata->last_command = NULL;
4970 mdata->nsects = 0;
4971 mdata->sections = NULL;
4972 mdata->dyn_reloc_cache = NULL;
4973
4974 return TRUE;
4975 }
4976
4977 static bfd_boolean
4978 bfd_mach_o_gen_mkobject (bfd *abfd)
4979 {
4980 bfd_mach_o_data_struct *mdata;
4981
4982 if (!bfd_mach_o_mkobject_init (abfd))
4983 return FALSE;
4984
4985 mdata = bfd_mach_o_get_data (abfd);
4986 mdata->header.magic = BFD_MACH_O_MH_MAGIC;
4987 mdata->header.cputype = 0;
4988 mdata->header.cpusubtype = 0;
4989 mdata->header.byteorder = abfd->xvec->byteorder;
4990 mdata->header.version = 1;
4991
4992 return TRUE;
4993 }
4994
4995 const bfd_target *
4996 bfd_mach_o_header_p (bfd *abfd,
4997 bfd_mach_o_filetype filetype,
4998 bfd_mach_o_cpu_type cputype)
4999 {
5000 bfd_mach_o_header header;
5001 bfd_mach_o_data_struct *mdata;
5002
5003 if (!bfd_mach_o_read_header (abfd, &header))
5004 goto wrong;
5005
5006 if (! (header.byteorder == BFD_ENDIAN_BIG
5007 || header.byteorder == BFD_ENDIAN_LITTLE))
5008 {
5009 (*_bfd_error_handler) (_("unknown header byte-order value 0x%lx"),
5010 (unsigned long) header.byteorder);
5011 goto wrong;
5012 }
5013
5014 if (! ((header.byteorder == BFD_ENDIAN_BIG
5015 && abfd->xvec->byteorder == BFD_ENDIAN_BIG
5016 && abfd->xvec->header_byteorder == BFD_ENDIAN_BIG)
5017 || (header.byteorder == BFD_ENDIAN_LITTLE
5018 && abfd->xvec->byteorder == BFD_ENDIAN_LITTLE
5019 && abfd->xvec->header_byteorder == BFD_ENDIAN_LITTLE)))
5020 goto wrong;
5021
5022 /* Check cputype and filetype.
5023 In case of wildcard, do not accept magics that are handled by existing
5024 targets. */
5025 if (cputype)
5026 {
5027 if (header.cputype != cputype)
5028 goto wrong;
5029 }
5030 else
5031 {
5032 #ifndef BFD64
5033 /* Do not recognize 64 architectures if not configured for 64bit targets.
5034 This could happen only for generic targets. */
5035 if (mach_o_wide_p (&header))
5036 goto wrong;
5037 #endif
5038 }
5039
5040 if (filetype)
5041 {
5042 if (header.filetype != filetype)
5043 goto wrong;
5044 }
5045 else
5046 {
5047 switch (header.filetype)
5048 {
5049 case BFD_MACH_O_MH_CORE:
5050 /* Handled by core_p */
5051 goto wrong;
5052 default:
5053 break;
5054 }
5055 }
5056
5057 mdata = (bfd_mach_o_data_struct *) bfd_zalloc (abfd, sizeof (*mdata));
5058 if (mdata == NULL)
5059 goto fail;
5060
5061 if (!bfd_mach_o_scan (abfd, &header, mdata))
5062 goto wrong;
5063
5064 return abfd->xvec;
5065
5066 wrong:
5067 bfd_set_error (bfd_error_wrong_format);
5068
5069 fail:
5070 return NULL;
5071 }
5072
5073 static const bfd_target *
5074 bfd_mach_o_gen_object_p (bfd *abfd)
5075 {
5076 return bfd_mach_o_header_p (abfd, 0, 0);
5077 }
5078
5079 static const bfd_target *
5080 bfd_mach_o_gen_core_p (bfd *abfd)
5081 {
5082 return bfd_mach_o_header_p (abfd, BFD_MACH_O_MH_CORE, 0);
5083 }
5084
5085 /* Return the base address of ABFD, ie the address at which the image is
5086 mapped. The possible initial pagezero is ignored. */
5087
5088 bfd_vma
5089 bfd_mach_o_get_base_address (bfd *abfd)
5090 {
5091 bfd_mach_o_data_struct *mdata;
5092 bfd_mach_o_load_command *cmd;
5093
5094 /* Check for Mach-O. */
5095 if (!bfd_mach_o_valid (abfd))
5096 return 0;
5097 mdata = bfd_mach_o_get_data (abfd);
5098
5099 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5100 {
5101 if ((cmd->type == BFD_MACH_O_LC_SEGMENT
5102 || cmd->type == BFD_MACH_O_LC_SEGMENT_64))
5103 {
5104 struct bfd_mach_o_segment_command *segcmd = &cmd->command.segment;
5105
5106 if (segcmd->initprot != 0)
5107 return segcmd->vmaddr;
5108 }
5109 }
5110 return 0;
5111 }
5112
5113 typedef struct mach_o_fat_archentry
5114 {
5115 unsigned long cputype;
5116 unsigned long cpusubtype;
5117 unsigned long offset;
5118 unsigned long size;
5119 unsigned long align;
5120 } mach_o_fat_archentry;
5121
5122 typedef struct mach_o_fat_data_struct
5123 {
5124 unsigned long magic;
5125 unsigned long nfat_arch;
5126 mach_o_fat_archentry *archentries;
5127 } mach_o_fat_data_struct;
5128
5129 const bfd_target *
5130 bfd_mach_o_archive_p (bfd *abfd)
5131 {
5132 mach_o_fat_data_struct *adata = NULL;
5133 struct mach_o_fat_header_external hdr;
5134 unsigned long i;
5135
5136 if (bfd_seek (abfd, 0, SEEK_SET) != 0
5137 || bfd_bread (&hdr, sizeof (hdr), abfd) != sizeof (hdr))
5138 goto error;
5139
5140 adata = bfd_alloc (abfd, sizeof (mach_o_fat_data_struct));
5141 if (adata == NULL)
5142 goto error;
5143
5144 adata->magic = bfd_getb32 (hdr.magic);
5145 adata->nfat_arch = bfd_getb32 (hdr.nfat_arch);
5146 if (adata->magic != 0xcafebabe)
5147 goto error;
5148 /* Avoid matching Java bytecode files, which have the same magic number.
5149 In the Java bytecode file format this field contains the JVM version,
5150 which starts at 43.0. */
5151 if (adata->nfat_arch > 30)
5152 goto error;
5153
5154 adata->archentries =
5155 bfd_alloc (abfd, adata->nfat_arch * sizeof (mach_o_fat_archentry));
5156 if (adata->archentries == NULL)
5157 goto error;
5158
5159 for (i = 0; i < adata->nfat_arch; i++)
5160 {
5161 struct mach_o_fat_arch_external arch;
5162 if (bfd_bread (&arch, sizeof (arch), abfd) != sizeof (arch))
5163 goto error;
5164 adata->archentries[i].cputype = bfd_getb32 (arch.cputype);
5165 adata->archentries[i].cpusubtype = bfd_getb32 (arch.cpusubtype);
5166 adata->archentries[i].offset = bfd_getb32 (arch.offset);
5167 adata->archentries[i].size = bfd_getb32 (arch.size);
5168 adata->archentries[i].align = bfd_getb32 (arch.align);
5169 }
5170
5171 abfd->tdata.mach_o_fat_data = adata;
5172 return abfd->xvec;
5173
5174 error:
5175 if (adata != NULL)
5176 bfd_release (abfd, adata);
5177 bfd_set_error (bfd_error_wrong_format);
5178 return NULL;
5179 }
5180
5181 /* Set the filename for a fat binary member ABFD, whose bfd architecture is
5182 ARCH_TYPE/ARCH_SUBTYPE and corresponding entry in header is ENTRY.
5183 Set arelt_data and origin fields too. */
5184
5185 static void
5186 bfd_mach_o_fat_member_init (bfd *abfd,
5187 enum bfd_architecture arch_type,
5188 unsigned long arch_subtype,
5189 mach_o_fat_archentry *entry)
5190 {
5191 struct areltdata *areltdata;
5192 /* Create the member filename. Use ARCH_NAME. */
5193 const bfd_arch_info_type *ap = bfd_lookup_arch (arch_type, arch_subtype);
5194
5195 if (ap)
5196 {
5197 /* Use the architecture name if known. */
5198 abfd->filename = xstrdup (ap->printable_name);
5199 }
5200 else
5201 {
5202 /* Forge a uniq id. */
5203 const size_t namelen = 2 + 8 + 1 + 2 + 8 + 1;
5204 char *name = xmalloc (namelen);
5205 snprintf (name, namelen, "0x%lx-0x%lx",
5206 entry->cputype, entry->cpusubtype);
5207 abfd->filename = name;
5208 }
5209
5210 areltdata = bfd_zmalloc (sizeof (struct areltdata));
5211 areltdata->parsed_size = entry->size;
5212 abfd->arelt_data = areltdata;
5213 abfd->iostream = NULL;
5214 abfd->origin = entry->offset;
5215 }
5216
5217 bfd *
5218 bfd_mach_o_openr_next_archived_file (bfd *archive, bfd *prev)
5219 {
5220 mach_o_fat_data_struct *adata;
5221 mach_o_fat_archentry *entry = NULL;
5222 unsigned long i;
5223 bfd *nbfd;
5224 enum bfd_architecture arch_type;
5225 unsigned long arch_subtype;
5226
5227 adata = (mach_o_fat_data_struct *) archive->tdata.mach_o_fat_data;
5228 BFD_ASSERT (adata != NULL);
5229
5230 /* Find index of previous entry. */
5231 if (prev == NULL)
5232 {
5233 /* Start at first one. */
5234 i = 0;
5235 }
5236 else
5237 {
5238 /* Find index of PREV. */
5239 for (i = 0; i < adata->nfat_arch; i++)
5240 {
5241 if (adata->archentries[i].offset == prev->origin)
5242 break;
5243 }
5244
5245 if (i == adata->nfat_arch)
5246 {
5247 /* Not found. */
5248 bfd_set_error (bfd_error_bad_value);
5249 return NULL;
5250 }
5251
5252 /* Get next entry. */
5253 i++;
5254 }
5255
5256 if (i >= adata->nfat_arch)
5257 {
5258 bfd_set_error (bfd_error_no_more_archived_files);
5259 return NULL;
5260 }
5261
5262 entry = &adata->archentries[i];
5263 nbfd = _bfd_new_bfd_contained_in (archive);
5264 if (nbfd == NULL)
5265 return NULL;
5266
5267 bfd_mach_o_convert_architecture (entry->cputype, entry->cpusubtype,
5268 &arch_type, &arch_subtype);
5269
5270 bfd_mach_o_fat_member_init (nbfd, arch_type, arch_subtype, entry);
5271
5272 bfd_set_arch_mach (nbfd, arch_type, arch_subtype);
5273
5274 return nbfd;
5275 }
5276
5277 /* Analogous to stat call. */
5278
5279 static int
5280 bfd_mach_o_fat_stat_arch_elt (bfd *abfd, struct stat *buf)
5281 {
5282 if (abfd->arelt_data == NULL)
5283 {
5284 bfd_set_error (bfd_error_invalid_operation);
5285 return -1;
5286 }
5287
5288 buf->st_mtime = 0;
5289 buf->st_uid = 0;
5290 buf->st_gid = 0;
5291 buf->st_mode = 0644;
5292 buf->st_size = arelt_size (abfd);
5293
5294 return 0;
5295 }
5296
5297 /* If ABFD format is FORMAT and architecture is ARCH, return it.
5298 If ABFD is a fat image containing a member that corresponds to FORMAT
5299 and ARCH, returns it.
5300 In other case, returns NULL.
5301 This function allows transparent uses of fat images. */
5302
5303 bfd *
5304 bfd_mach_o_fat_extract (bfd *abfd,
5305 bfd_format format,
5306 const bfd_arch_info_type *arch)
5307 {
5308 bfd *res;
5309 mach_o_fat_data_struct *adata;
5310 unsigned int i;
5311
5312 if (bfd_check_format (abfd, format))
5313 {
5314 if (bfd_get_arch_info (abfd) == arch)
5315 return abfd;
5316 return NULL;
5317 }
5318 if (!bfd_check_format (abfd, bfd_archive)
5319 || abfd->xvec != &mach_o_fat_vec)
5320 return NULL;
5321
5322 /* This is a Mach-O fat image. */
5323 adata = (mach_o_fat_data_struct *) abfd->tdata.mach_o_fat_data;
5324 BFD_ASSERT (adata != NULL);
5325
5326 for (i = 0; i < adata->nfat_arch; i++)
5327 {
5328 struct mach_o_fat_archentry *e = &adata->archentries[i];
5329 enum bfd_architecture cpu_type;
5330 unsigned long cpu_subtype;
5331
5332 bfd_mach_o_convert_architecture (e->cputype, e->cpusubtype,
5333 &cpu_type, &cpu_subtype);
5334 if (cpu_type != arch->arch || cpu_subtype != arch->mach)
5335 continue;
5336
5337 /* The architecture is found. */
5338 res = _bfd_new_bfd_contained_in (abfd);
5339 if (res == NULL)
5340 return NULL;
5341
5342 bfd_mach_o_fat_member_init (res, cpu_type, cpu_subtype, e);
5343
5344 if (bfd_check_format (res, format))
5345 {
5346 BFD_ASSERT (bfd_get_arch_info (res) == arch);
5347 return res;
5348 }
5349 bfd_close (res);
5350 return NULL;
5351 }
5352
5353 return NULL;
5354 }
5355
5356 int
5357 bfd_mach_o_lookup_command (bfd *abfd,
5358 bfd_mach_o_load_command_type type,
5359 bfd_mach_o_load_command **mcommand)
5360 {
5361 struct mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5362 struct bfd_mach_o_load_command *cmd;
5363 unsigned int num;
5364
5365 BFD_ASSERT (mdata != NULL);
5366 BFD_ASSERT (mcommand != NULL);
5367
5368 num = 0;
5369 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5370 {
5371 if (cmd->type != type)
5372 continue;
5373
5374 if (num == 0)
5375 *mcommand = cmd;
5376 num++;
5377 }
5378
5379 return num;
5380 }
5381
5382 unsigned long
5383 bfd_mach_o_stack_addr (enum bfd_mach_o_cpu_type type)
5384 {
5385 switch (type)
5386 {
5387 case BFD_MACH_O_CPU_TYPE_MC680x0:
5388 return 0x04000000;
5389 case BFD_MACH_O_CPU_TYPE_MC88000:
5390 return 0xffffe000;
5391 case BFD_MACH_O_CPU_TYPE_POWERPC:
5392 return 0xc0000000;
5393 case BFD_MACH_O_CPU_TYPE_I386:
5394 return 0xc0000000;
5395 case BFD_MACH_O_CPU_TYPE_SPARC:
5396 return 0xf0000000;
5397 case BFD_MACH_O_CPU_TYPE_I860:
5398 return 0;
5399 case BFD_MACH_O_CPU_TYPE_HPPA:
5400 return 0xc0000000 - 0x04000000;
5401 default:
5402 return 0;
5403 }
5404 }
5405
5406 /* The following two tables should be kept, as far as possible, in order of
5407 most frequently used entries to optimize their use from gas. */
5408
5409 const bfd_mach_o_xlat_name bfd_mach_o_section_type_name[] =
5410 {
5411 { "regular", BFD_MACH_O_S_REGULAR},
5412 { "coalesced", BFD_MACH_O_S_COALESCED},
5413 { "zerofill", BFD_MACH_O_S_ZEROFILL},
5414 { "cstring_literals", BFD_MACH_O_S_CSTRING_LITERALS},
5415 { "4byte_literals", BFD_MACH_O_S_4BYTE_LITERALS},
5416 { "8byte_literals", BFD_MACH_O_S_8BYTE_LITERALS},
5417 { "16byte_literals", BFD_MACH_O_S_16BYTE_LITERALS},
5418 { "literal_pointers", BFD_MACH_O_S_LITERAL_POINTERS},
5419 { "mod_init_func_pointers", BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS},
5420 { "mod_fini_func_pointers", BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS},
5421 { "gb_zerofill", BFD_MACH_O_S_GB_ZEROFILL},
5422 { "interposing", BFD_MACH_O_S_INTERPOSING},
5423 { "dtrace_dof", BFD_MACH_O_S_DTRACE_DOF},
5424 { "non_lazy_symbol_pointers", BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS},
5425 { "lazy_symbol_pointers", BFD_MACH_O_S_LAZY_SYMBOL_POINTERS},
5426 { "symbol_stubs", BFD_MACH_O_S_SYMBOL_STUBS},
5427 { "lazy_dylib_symbol_pointers", BFD_MACH_O_S_LAZY_DYLIB_SYMBOL_POINTERS},
5428 { NULL, 0}
5429 };
5430
5431 const bfd_mach_o_xlat_name bfd_mach_o_section_attribute_name[] =
5432 {
5433 { "pure_instructions", BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS },
5434 { "some_instructions", BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS },
5435 { "loc_reloc", BFD_MACH_O_S_ATTR_LOC_RELOC },
5436 { "ext_reloc", BFD_MACH_O_S_ATTR_EXT_RELOC },
5437 { "debug", BFD_MACH_O_S_ATTR_DEBUG },
5438 { "live_support", BFD_MACH_O_S_ATTR_LIVE_SUPPORT },
5439 { "no_dead_strip", BFD_MACH_O_S_ATTR_NO_DEAD_STRIP },
5440 { "strip_static_syms", BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS },
5441 { "no_toc", BFD_MACH_O_S_ATTR_NO_TOC },
5442 { "self_modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
5443 { "modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
5444 { NULL, 0}
5445 };
5446
5447 /* Get the section type from NAME. Return 256 if NAME is unknown. */
5448
5449 unsigned int
5450 bfd_mach_o_get_section_type_from_name (bfd *abfd, const char *name)
5451 {
5452 const bfd_mach_o_xlat_name *x;
5453 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
5454
5455 for (x = bfd_mach_o_section_type_name; x->name; x++)
5456 if (strcmp (x->name, name) == 0)
5457 {
5458 /* We found it... does the target support it? */
5459 if (bed->bfd_mach_o_section_type_valid_for_target == NULL
5460 || bed->bfd_mach_o_section_type_valid_for_target (x->val))
5461 return x->val; /* OK. */
5462 else
5463 break; /* Not supported. */
5464 }
5465 /* Maximum section ID = 0xff. */
5466 return 256;
5467 }
5468
5469 /* Get the section attribute from NAME. Return -1 if NAME is unknown. */
5470
5471 unsigned int
5472 bfd_mach_o_get_section_attribute_from_name (const char *name)
5473 {
5474 const bfd_mach_o_xlat_name *x;
5475
5476 for (x = bfd_mach_o_section_attribute_name; x->name; x++)
5477 if (strcmp (x->name, name) == 0)
5478 return x->val;
5479 return (unsigned int)-1;
5480 }
5481
5482 int
5483 bfd_mach_o_core_fetch_environment (bfd *abfd,
5484 unsigned char **rbuf,
5485 unsigned int *rlen)
5486 {
5487 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5488 unsigned long stackaddr = bfd_mach_o_stack_addr (mdata->header.cputype);
5489 bfd_mach_o_load_command *cmd;
5490
5491 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5492 {
5493 bfd_mach_o_segment_command *seg;
5494
5495 if (cmd->type != BFD_MACH_O_LC_SEGMENT)
5496 continue;
5497
5498 seg = &cmd->command.segment;
5499
5500 if ((seg->vmaddr + seg->vmsize) == stackaddr)
5501 {
5502 unsigned long start = seg->fileoff;
5503 unsigned long end = seg->fileoff + seg->filesize;
5504 unsigned char *buf = bfd_malloc (1024);
5505 unsigned long size = 1024;
5506
5507 for (;;)
5508 {
5509 bfd_size_type nread = 0;
5510 unsigned long offset;
5511 int found_nonnull = 0;
5512
5513 if (size > (end - start))
5514 size = (end - start);
5515
5516 buf = bfd_realloc_or_free (buf, size);
5517 if (buf == NULL)
5518 return -1;
5519
5520 if (bfd_seek (abfd, end - size, SEEK_SET) != 0)
5521 {
5522 free (buf);
5523 return -1;
5524 }
5525
5526 nread = bfd_bread (buf, size, abfd);
5527
5528 if (nread != size)
5529 {
5530 free (buf);
5531 return -1;
5532 }
5533
5534 for (offset = 4; offset <= size; offset += 4)
5535 {
5536 unsigned long val;
5537
5538 val = *((unsigned long *) (buf + size - offset));
5539 if (! found_nonnull)
5540 {
5541 if (val != 0)
5542 found_nonnull = 1;
5543 }
5544 else if (val == 0x0)
5545 {
5546 unsigned long bottom;
5547 unsigned long top;
5548
5549 bottom = seg->fileoff + seg->filesize - offset;
5550 top = seg->fileoff + seg->filesize - 4;
5551 *rbuf = bfd_malloc (top - bottom);
5552 *rlen = top - bottom;
5553
5554 memcpy (*rbuf, buf + size - *rlen, *rlen);
5555 free (buf);
5556 return 0;
5557 }
5558 }
5559
5560 if (size == (end - start))
5561 break;
5562
5563 size *= 2;
5564 }
5565
5566 free (buf);
5567 }
5568 }
5569
5570 return -1;
5571 }
5572
5573 char *
5574 bfd_mach_o_core_file_failing_command (bfd *abfd)
5575 {
5576 unsigned char *buf = NULL;
5577 unsigned int len = 0;
5578 int ret;
5579
5580 ret = bfd_mach_o_core_fetch_environment (abfd, &buf, &len);
5581 if (ret < 0)
5582 return NULL;
5583
5584 return (char *) buf;
5585 }
5586
5587 int
5588 bfd_mach_o_core_file_failing_signal (bfd *abfd ATTRIBUTE_UNUSED)
5589 {
5590 return 0;
5591 }
5592
5593 static bfd_mach_o_uuid_command *
5594 bfd_mach_o_lookup_uuid_command (bfd *abfd)
5595 {
5596 bfd_mach_o_load_command *uuid_cmd;
5597 int ncmd = bfd_mach_o_lookup_command (abfd, BFD_MACH_O_LC_UUID, &uuid_cmd);
5598 if (ncmd != 1)
5599 return FALSE;
5600 return &uuid_cmd->command.uuid;
5601 }
5602
5603 /* Return true if ABFD is a dSYM file and its UUID matches UUID_CMD. */
5604
5605 static bfd_boolean
5606 bfd_mach_o_dsym_for_uuid_p (bfd *abfd, const bfd_mach_o_uuid_command *uuid_cmd)
5607 {
5608 bfd_mach_o_uuid_command *dsym_uuid_cmd;
5609
5610 BFD_ASSERT (abfd);
5611 BFD_ASSERT (uuid_cmd);
5612
5613 if (!bfd_check_format (abfd, bfd_object))
5614 return FALSE;
5615
5616 if (bfd_get_flavour (abfd) != bfd_target_mach_o_flavour
5617 || bfd_mach_o_get_data (abfd) == NULL
5618 || bfd_mach_o_get_data (abfd)->header.filetype != BFD_MACH_O_MH_DSYM)
5619 return FALSE;
5620
5621 dsym_uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd);
5622 if (dsym_uuid_cmd == NULL)
5623 return FALSE;
5624
5625 if (memcmp (uuid_cmd->uuid, dsym_uuid_cmd->uuid,
5626 sizeof (uuid_cmd->uuid)) != 0)
5627 return FALSE;
5628
5629 return TRUE;
5630 }
5631
5632 /* Find a BFD in DSYM_FILENAME which matches ARCH and UUID_CMD.
5633 The caller is responsible for closing the returned BFD object and
5634 its my_archive if the returned BFD is in a fat dSYM. */
5635
5636 static bfd *
5637 bfd_mach_o_find_dsym (const char *dsym_filename,
5638 const bfd_mach_o_uuid_command *uuid_cmd,
5639 const bfd_arch_info_type *arch)
5640 {
5641 bfd *base_dsym_bfd, *dsym_bfd;
5642
5643 BFD_ASSERT (uuid_cmd);
5644
5645 base_dsym_bfd = bfd_openr (dsym_filename, NULL);
5646 if (base_dsym_bfd == NULL)
5647 return NULL;
5648
5649 dsym_bfd = bfd_mach_o_fat_extract (base_dsym_bfd, bfd_object, arch);
5650 if (bfd_mach_o_dsym_for_uuid_p (dsym_bfd, uuid_cmd))
5651 return dsym_bfd;
5652
5653 bfd_close (dsym_bfd);
5654 if (base_dsym_bfd != dsym_bfd)
5655 bfd_close (base_dsym_bfd);
5656
5657 return NULL;
5658 }
5659
5660 /* Return a BFD created from a dSYM file for ABFD.
5661 The caller is responsible for closing the returned BFD object, its
5662 filename, and its my_archive if the returned BFD is in a fat dSYM. */
5663
5664 static bfd *
5665 bfd_mach_o_follow_dsym (bfd *abfd)
5666 {
5667 char *dsym_filename;
5668 bfd_mach_o_uuid_command *uuid_cmd;
5669 bfd *dsym_bfd, *base_bfd = abfd;
5670 const char *base_basename;
5671
5672 if (abfd == NULL || bfd_get_flavour (abfd) != bfd_target_mach_o_flavour)
5673 return NULL;
5674
5675 if (abfd->my_archive)
5676 base_bfd = abfd->my_archive;
5677 /* BFD may have been opened from a stream. */
5678 if (base_bfd->filename == NULL)
5679 {
5680 bfd_set_error (bfd_error_invalid_operation);
5681 return NULL;
5682 }
5683 base_basename = lbasename (base_bfd->filename);
5684
5685 uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd);
5686 if (uuid_cmd == NULL)
5687 return NULL;
5688
5689 /* TODO: We assume the DWARF file has the same as the binary's.
5690 It seems apple's GDB checks all files in the dSYM bundle directory.
5691 http://opensource.apple.com/source/gdb/gdb-1708/src/gdb/macosx/macosx-tdep.c
5692 */
5693 dsym_filename = (char *)bfd_malloc (strlen (base_bfd->filename)
5694 + strlen (dsym_subdir) + 1
5695 + strlen (base_basename) + 1);
5696 sprintf (dsym_filename, "%s%s/%s",
5697 base_bfd->filename, dsym_subdir, base_basename);
5698
5699 dsym_bfd = bfd_mach_o_find_dsym (dsym_filename, uuid_cmd,
5700 bfd_get_arch_info (abfd));
5701 if (dsym_bfd == NULL)
5702 free (dsym_filename);
5703
5704 return dsym_bfd;
5705 }
5706
5707 bfd_boolean
5708 bfd_mach_o_find_nearest_line (bfd *abfd,
5709 asymbol **symbols,
5710 asection *section,
5711 bfd_vma offset,
5712 const char **filename_ptr,
5713 const char **functionname_ptr,
5714 unsigned int *line_ptr,
5715 unsigned int *discriminator_ptr)
5716 {
5717 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5718 if (mdata == NULL)
5719 return FALSE;
5720 switch (mdata->header.filetype)
5721 {
5722 case BFD_MACH_O_MH_OBJECT:
5723 break;
5724 case BFD_MACH_O_MH_EXECUTE:
5725 case BFD_MACH_O_MH_DYLIB:
5726 case BFD_MACH_O_MH_BUNDLE:
5727 case BFD_MACH_O_MH_KEXT_BUNDLE:
5728 if (mdata->dwarf2_find_line_info == NULL)
5729 {
5730 mdata->dsym_bfd = bfd_mach_o_follow_dsym (abfd);
5731 /* When we couldn't find dSYM for this binary, we look for
5732 the debug information in the binary itself. In this way,
5733 we won't try finding separated dSYM again because
5734 mdata->dwarf2_find_line_info will be filled. */
5735 if (! mdata->dsym_bfd)
5736 break;
5737 if (! _bfd_dwarf2_slurp_debug_info (abfd, mdata->dsym_bfd,
5738 dwarf_debug_sections, symbols,
5739 &mdata->dwarf2_find_line_info,
5740 FALSE))
5741 return FALSE;
5742 }
5743 break;
5744 default:
5745 return FALSE;
5746 }
5747 return _bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset,
5748 filename_ptr, functionname_ptr,
5749 line_ptr, discriminator_ptr,
5750 dwarf_debug_sections, 0,
5751 &mdata->dwarf2_find_line_info);
5752 }
5753
5754 bfd_boolean
5755 bfd_mach_o_close_and_cleanup (bfd *abfd)
5756 {
5757 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5758 if (bfd_get_format (abfd) == bfd_object && mdata != NULL)
5759 {
5760 _bfd_dwarf2_cleanup_debug_info (abfd, &mdata->dwarf2_find_line_info);
5761 bfd_mach_o_free_cached_info (abfd);
5762 if (mdata->dsym_bfd != NULL)
5763 {
5764 bfd *fat_bfd = mdata->dsym_bfd->my_archive;
5765 char *dsym_filename = (char *)(fat_bfd
5766 ? fat_bfd->filename
5767 : mdata->dsym_bfd->filename);
5768 bfd_close (mdata->dsym_bfd);
5769 mdata->dsym_bfd = NULL;
5770 if (fat_bfd)
5771 bfd_close (fat_bfd);
5772 free (dsym_filename);
5773 }
5774 }
5775
5776 if (bfd_get_format (abfd) == bfd_archive
5777 && abfd->xvec == &mach_o_fat_vec)
5778 return TRUE;
5779 return _bfd_generic_close_and_cleanup (abfd);
5780 }
5781
5782 bfd_boolean bfd_mach_o_free_cached_info (bfd *abfd)
5783 {
5784 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5785 asection *asect;
5786 free (mdata->dyn_reloc_cache);
5787 mdata->dyn_reloc_cache = NULL;
5788 for (asect = abfd->sections; asect != NULL; asect = asect->next)
5789 {
5790 free (asect->relocation);
5791 asect->relocation = NULL;
5792 }
5793
5794 return TRUE;
5795 }
5796
5797 #define bfd_mach_o_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
5798 #define bfd_mach_o_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_lookup
5799
5800 #define bfd_mach_o_swap_reloc_in NULL
5801 #define bfd_mach_o_swap_reloc_out NULL
5802 #define bfd_mach_o_print_thread NULL
5803 #define bfd_mach_o_tgt_seg_table NULL
5804 #define bfd_mach_o_section_type_valid_for_tgt NULL
5805
5806 #define TARGET_NAME mach_o_be_vec
5807 #define TARGET_STRING "mach-o-be"
5808 #define TARGET_ARCHITECTURE bfd_arch_unknown
5809 #define TARGET_PAGESIZE 1
5810 #define TARGET_BIG_ENDIAN 1
5811 #define TARGET_ARCHIVE 0
5812 #define TARGET_PRIORITY 1
5813 #include "mach-o-target.c"
5814
5815 #undef TARGET_NAME
5816 #undef TARGET_STRING
5817 #undef TARGET_ARCHITECTURE
5818 #undef TARGET_PAGESIZE
5819 #undef TARGET_BIG_ENDIAN
5820 #undef TARGET_ARCHIVE
5821 #undef TARGET_PRIORITY
5822
5823 #define TARGET_NAME mach_o_le_vec
5824 #define TARGET_STRING "mach-o-le"
5825 #define TARGET_ARCHITECTURE bfd_arch_unknown
5826 #define TARGET_PAGESIZE 1
5827 #define TARGET_BIG_ENDIAN 0
5828 #define TARGET_ARCHIVE 0
5829 #define TARGET_PRIORITY 1
5830
5831 #include "mach-o-target.c"
5832
5833 #undef TARGET_NAME
5834 #undef TARGET_STRING
5835 #undef TARGET_ARCHITECTURE
5836 #undef TARGET_PAGESIZE
5837 #undef TARGET_BIG_ENDIAN
5838 #undef TARGET_ARCHIVE
5839 #undef TARGET_PRIORITY
5840
5841 /* Not yet handled: creating an archive. */
5842 #define bfd_mach_o_mkarchive _bfd_noarchive_mkarchive
5843
5844 /* Not used. */
5845 #define bfd_mach_o_read_ar_hdr _bfd_noarchive_read_ar_hdr
5846 #define bfd_mach_o_write_ar_hdr _bfd_noarchive_write_ar_hdr
5847 #define bfd_mach_o_slurp_armap _bfd_noarchive_slurp_armap
5848 #define bfd_mach_o_slurp_extended_name_table _bfd_noarchive_slurp_extended_name_table
5849 #define bfd_mach_o_construct_extended_name_table _bfd_noarchive_construct_extended_name_table
5850 #define bfd_mach_o_truncate_arname _bfd_noarchive_truncate_arname
5851 #define bfd_mach_o_write_armap _bfd_noarchive_write_armap
5852 #define bfd_mach_o_get_elt_at_index _bfd_noarchive_get_elt_at_index
5853 #define bfd_mach_o_generic_stat_arch_elt bfd_mach_o_fat_stat_arch_elt
5854 #define bfd_mach_o_update_armap_timestamp _bfd_noarchive_update_armap_timestamp
5855
5856 #define TARGET_NAME mach_o_fat_vec
5857 #define TARGET_STRING "mach-o-fat"
5858 #define TARGET_ARCHITECTURE bfd_arch_unknown
5859 #define TARGET_PAGESIZE 1
5860 #define TARGET_BIG_ENDIAN 1
5861 #define TARGET_ARCHIVE 1
5862 #define TARGET_PRIORITY 0
5863
5864 #include "mach-o-target.c"
5865
5866 #undef TARGET_NAME
5867 #undef TARGET_STRING
5868 #undef TARGET_ARCHITECTURE
5869 #undef TARGET_PAGESIZE
5870 #undef TARGET_BIG_ENDIAN
5871 #undef TARGET_ARCHIVE
5872 #undef TARGET_PRIORITY
GDB Binutils - Deliverables
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