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Remove syntactic sugar
[deliverable/binutils-gdb.git] / bfd / mach-o.c
1 /* Mach-O support for BFD.
2 Copyright (C) 1999-2016 Free Software Foundation, Inc.
3
4 This file is part of BFD, the Binary File Descriptor library.
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
20
21 #include "sysdep.h"
22 #include "mach-o.h"
23 #include "bfd.h"
24 #include "libbfd.h"
25 #include "libiberty.h"
26 #include "aout/stab_gnu.h"
27 #include "mach-o/reloc.h"
28 #include "mach-o/external.h"
29 #include <ctype.h>
30 #include <stdlib.h>
31 #include <string.h>
32
33 #define bfd_mach_o_object_p bfd_mach_o_gen_object_p
34 #define bfd_mach_o_core_p bfd_mach_o_gen_core_p
35 #define bfd_mach_o_mkobject bfd_mach_o_gen_mkobject
36
37 #define FILE_ALIGN(off, algn) \
38 (((off) + ((file_ptr) 1 << (algn)) - 1) & ((file_ptr) -1U << (algn)))
39
40 static bfd_boolean
41 bfd_mach_o_read_dyld_content (bfd *abfd, bfd_mach_o_dyld_info_command *cmd);
42
43 unsigned int
44 bfd_mach_o_version (bfd *abfd)
45 {
46 bfd_mach_o_data_struct *mdata = NULL;
47
48 BFD_ASSERT (bfd_mach_o_valid (abfd));
49 mdata = bfd_mach_o_get_data (abfd);
50
51 return mdata->header.version;
52 }
53
54 bfd_boolean
55 bfd_mach_o_valid (bfd *abfd)
56 {
57 if (abfd == NULL || abfd->xvec == NULL)
58 return FALSE;
59
60 if (abfd->xvec->flavour != bfd_target_mach_o_flavour)
61 return FALSE;
62
63 if (bfd_mach_o_get_data (abfd) == NULL)
64 return FALSE;
65 return TRUE;
66 }
67
68 static INLINE bfd_boolean
69 mach_o_wide_p (bfd_mach_o_header *header)
70 {
71 switch (header->version)
72 {
73 case 1:
74 return FALSE;
75 case 2:
76 return TRUE;
77 default:
78 BFD_FAIL ();
79 return FALSE;
80 }
81 }
82
83 static INLINE bfd_boolean
84 bfd_mach_o_wide_p (bfd *abfd)
85 {
86 return mach_o_wide_p (&bfd_mach_o_get_data (abfd)->header);
87 }
88
89 /* Tables to translate well known Mach-O segment/section names to bfd
90 names. Use of canonical names (such as .text or .debug_frame) is required
91 by gdb. */
92
93 /* __TEXT Segment. */
94 static const mach_o_section_name_xlat text_section_names_xlat[] =
95 {
96 { ".text", "__text",
97 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR,
98 BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS, 0},
99 { ".const", "__const",
100 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
101 BFD_MACH_O_S_ATTR_NONE, 0},
102 { ".static_const", "__static_const",
103 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
104 BFD_MACH_O_S_ATTR_NONE, 0},
105 { ".cstring", "__cstring",
106 SEC_READONLY | SEC_DATA | SEC_LOAD | SEC_MERGE | SEC_STRINGS,
107 BFD_MACH_O_S_CSTRING_LITERALS,
108 BFD_MACH_O_S_ATTR_NONE, 0},
109 { ".literal4", "__literal4",
110 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_4BYTE_LITERALS,
111 BFD_MACH_O_S_ATTR_NONE, 2},
112 { ".literal8", "__literal8",
113 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_8BYTE_LITERALS,
114 BFD_MACH_O_S_ATTR_NONE, 3},
115 { ".literal16", "__literal16",
116 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_16BYTE_LITERALS,
117 BFD_MACH_O_S_ATTR_NONE, 4},
118 { ".constructor", "__constructor",
119 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR,
120 BFD_MACH_O_S_ATTR_NONE, 0},
121 { ".destructor", "__destructor",
122 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR,
123 BFD_MACH_O_S_ATTR_NONE, 0},
124 { ".eh_frame", "__eh_frame",
125 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_COALESCED,
126 BFD_MACH_O_S_ATTR_LIVE_SUPPORT
127 | BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS
128 | BFD_MACH_O_S_ATTR_NO_TOC, 2},
129 { NULL, NULL, 0, 0, 0, 0}
130 };
131
132 /* __DATA Segment. */
133 static const mach_o_section_name_xlat data_section_names_xlat[] =
134 {
135 { ".data", "__data",
136 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
137 BFD_MACH_O_S_ATTR_NONE, 0},
138 { ".bss", "__bss",
139 SEC_NO_FLAGS, BFD_MACH_O_S_ZEROFILL,
140 BFD_MACH_O_S_ATTR_NONE, 0},
141 { ".const_data", "__const",
142 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
143 BFD_MACH_O_S_ATTR_NONE, 0},
144 { ".static_data", "__static_data",
145 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
146 BFD_MACH_O_S_ATTR_NONE, 0},
147 { ".mod_init_func", "__mod_init_func",
148 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS,
149 BFD_MACH_O_S_ATTR_NONE, 2},
150 { ".mod_term_func", "__mod_term_func",
151 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS,
152 BFD_MACH_O_S_ATTR_NONE, 2},
153 { ".dyld", "__dyld",
154 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
155 BFD_MACH_O_S_ATTR_NONE, 0},
156 { ".cfstring", "__cfstring",
157 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
158 BFD_MACH_O_S_ATTR_NONE, 2},
159 { NULL, NULL, 0, 0, 0, 0}
160 };
161
162 /* __DWARF Segment. */
163 static const mach_o_section_name_xlat dwarf_section_names_xlat[] =
164 {
165 { ".debug_frame", "__debug_frame",
166 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
167 BFD_MACH_O_S_ATTR_DEBUG, 0},
168 { ".debug_info", "__debug_info",
169 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
170 BFD_MACH_O_S_ATTR_DEBUG, 0},
171 { ".debug_abbrev", "__debug_abbrev",
172 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
173 BFD_MACH_O_S_ATTR_DEBUG, 0},
174 { ".debug_aranges", "__debug_aranges",
175 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
176 BFD_MACH_O_S_ATTR_DEBUG, 0},
177 { ".debug_macinfo", "__debug_macinfo",
178 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
179 BFD_MACH_O_S_ATTR_DEBUG, 0},
180 { ".debug_line", "__debug_line",
181 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
182 BFD_MACH_O_S_ATTR_DEBUG, 0},
183 { ".debug_loc", "__debug_loc",
184 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
185 BFD_MACH_O_S_ATTR_DEBUG, 0},
186 { ".debug_pubnames", "__debug_pubnames",
187 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
188 BFD_MACH_O_S_ATTR_DEBUG, 0},
189 { ".debug_pubtypes", "__debug_pubtypes",
190 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
191 BFD_MACH_O_S_ATTR_DEBUG, 0},
192 { ".debug_str", "__debug_str",
193 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
194 BFD_MACH_O_S_ATTR_DEBUG, 0},
195 { ".debug_ranges", "__debug_ranges",
196 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
197 BFD_MACH_O_S_ATTR_DEBUG, 0},
198 { ".debug_macro", "__debug_macro",
199 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
200 BFD_MACH_O_S_ATTR_DEBUG, 0},
201 { ".debug_gdb_scripts", "__debug_gdb_scri",
202 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
203 BFD_MACH_O_S_ATTR_DEBUG, 0},
204 { NULL, NULL, 0, 0, 0, 0}
205 };
206
207 /* __OBJC Segment. */
208 static const mach_o_section_name_xlat objc_section_names_xlat[] =
209 {
210 { ".objc_class", "__class",
211 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
212 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
213 { ".objc_meta_class", "__meta_class",
214 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
215 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
216 { ".objc_cat_cls_meth", "__cat_cls_meth",
217 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
218 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
219 { ".objc_cat_inst_meth", "__cat_inst_meth",
220 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
221 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
222 { ".objc_protocol", "__protocol",
223 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
224 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
225 { ".objc_string_object", "__string_object",
226 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
227 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
228 { ".objc_cls_meth", "__cls_meth",
229 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
230 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
231 { ".objc_inst_meth", "__inst_meth",
232 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
233 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
234 { ".objc_cls_refs", "__cls_refs",
235 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LITERAL_POINTERS,
236 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
237 { ".objc_message_refs", "__message_refs",
238 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LITERAL_POINTERS,
239 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
240 { ".objc_symbols", "__symbols",
241 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
242 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
243 { ".objc_category", "__category",
244 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
245 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
246 { ".objc_class_vars", "__class_vars",
247 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
248 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
249 { ".objc_instance_vars", "__instance_vars",
250 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
251 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
252 { ".objc_module_info", "__module_info",
253 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
254 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
255 { ".objc_selector_strs", "__selector_strs",
256 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_CSTRING_LITERALS,
257 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
258 { ".objc_image_info", "__image_info",
259 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
260 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
261 { ".objc_selector_fixup", "__sel_fixup",
262 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
263 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
264 /* Objc V1 */
265 { ".objc1_class_ext", "__class_ext",
266 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
267 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
268 { ".objc1_property_list", "__property",
269 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
270 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
271 { ".objc1_protocol_ext", "__protocol_ext",
272 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
273 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
274 { NULL, NULL, 0, 0, 0, 0}
275 };
276
277 static const mach_o_segment_name_xlat segsec_names_xlat[] =
278 {
279 { "__TEXT", text_section_names_xlat },
280 { "__DATA", data_section_names_xlat },
281 { "__DWARF", dwarf_section_names_xlat },
282 { "__OBJC", objc_section_names_xlat },
283 { NULL, NULL }
284 };
285
286 static const char dsym_subdir[] = ".dSYM/Contents/Resources/DWARF";
287
288 /* For both cases bfd-name => mach-o name and vice versa, the specific target
289 is checked before the generic. This allows a target (e.g. ppc for cstring)
290 to override the generic definition with a more specific one. */
291
292 /* Fetch the translation from a Mach-O section designation (segment, section)
293 as a bfd short name, if one exists. Otherwise return NULL.
294
295 Allow the segment and section names to be unterminated 16 byte arrays. */
296
297 const mach_o_section_name_xlat *
298 bfd_mach_o_section_data_for_mach_sect (bfd *abfd, const char *segname,
299 const char *sectname)
300 {
301 const struct mach_o_segment_name_xlat *seg;
302 const mach_o_section_name_xlat *sec;
303 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
304
305 /* First try any target-specific translations defined... */
306 if (bed->segsec_names_xlat)
307 for (seg = bed->segsec_names_xlat; seg->segname; seg++)
308 if (strncmp (seg->segname, segname, BFD_MACH_O_SEGNAME_SIZE) == 0)
309 for (sec = seg->sections; sec->mach_o_name; sec++)
310 if (strncmp (sec->mach_o_name, sectname,
311 BFD_MACH_O_SECTNAME_SIZE) == 0)
312 return sec;
313
314 /* ... and then the Mach-O generic ones. */
315 for (seg = segsec_names_xlat; seg->segname; seg++)
316 if (strncmp (seg->segname, segname, BFD_MACH_O_SEGNAME_SIZE) == 0)
317 for (sec = seg->sections; sec->mach_o_name; sec++)
318 if (strncmp (sec->mach_o_name, sectname,
319 BFD_MACH_O_SECTNAME_SIZE) == 0)
320 return sec;
321
322 return NULL;
323 }
324
325 /* If the bfd_name for this section is a 'canonical' form for which we
326 know the Mach-O data, return the segment name and the data for the
327 Mach-O equivalent. Otherwise return NULL. */
328
329 const mach_o_section_name_xlat *
330 bfd_mach_o_section_data_for_bfd_name (bfd *abfd, const char *bfd_name,
331 const char **segname)
332 {
333 const struct mach_o_segment_name_xlat *seg;
334 const mach_o_section_name_xlat *sec;
335 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
336 *segname = NULL;
337
338 if (bfd_name[0] != '.')
339 return NULL;
340
341 /* First try any target-specific translations defined... */
342 if (bed->segsec_names_xlat)
343 for (seg = bed->segsec_names_xlat; seg->segname; seg++)
344 for (sec = seg->sections; sec->bfd_name; sec++)
345 if (strcmp (bfd_name, sec->bfd_name) == 0)
346 {
347 *segname = seg->segname;
348 return sec;
349 }
350
351 /* ... and then the Mach-O generic ones. */
352 for (seg = segsec_names_xlat; seg->segname; seg++)
353 for (sec = seg->sections; sec->bfd_name; sec++)
354 if (strcmp (bfd_name, sec->bfd_name) == 0)
355 {
356 *segname = seg->segname;
357 return sec;
358 }
359
360 return NULL;
361 }
362
363 /* Convert Mach-O section name to BFD.
364
365 Try to use standard/canonical names, for which we have tables including
366 default flag settings - which are returned. Otherwise forge a new name
367 in the form "<segmentname>.<sectionname>" this will be prefixed with
368 LC_SEGMENT. if the segment name does not begin with an underscore.
369
370 SEGNAME and SECTNAME are 16 byte arrays (they do not need to be NUL-
371 terminated if the name length is exactly 16 bytes - but must be if the name
372 length is less than 16 characters). */
373
374 void
375 bfd_mach_o_convert_section_name_to_bfd (bfd *abfd, const char *segname,
376 const char *secname, const char **name,
377 flagword *flags)
378 {
379 const mach_o_section_name_xlat *xlat;
380 char *res;
381 unsigned int len;
382 const char *pfx = "";
383
384 *name = NULL;
385 *flags = SEC_NO_FLAGS;
386
387 /* First search for a canonical name...
388 xlat will be non-null if there is an entry for segname, secname. */
389 xlat = bfd_mach_o_section_data_for_mach_sect (abfd, segname, secname);
390 if (xlat)
391 {
392 len = strlen (xlat->bfd_name);
393 res = bfd_alloc (abfd, len + 1);
394 if (res == NULL)
395 return;
396 memcpy (res, xlat->bfd_name, len+1);
397 *name = res;
398 *flags = xlat->bfd_flags;
399 return;
400 }
401
402 /* ... else we make up a bfd name from the segment concatenated with the
403 section. */
404
405 len = 16 + 1 + 16 + 1;
406
407 /* Put "LC_SEGMENT." prefix if the segment name is weird (ie doesn't start
408 with an underscore. */
409 if (segname[0] != '_')
410 {
411 static const char seg_pfx[] = "LC_SEGMENT.";
412
413 pfx = seg_pfx;
414 len += sizeof (seg_pfx) - 1;
415 }
416
417 res = bfd_alloc (abfd, len);
418 if (res == NULL)
419 return;
420 snprintf (res, len, "%s%.16s.%.16s", pfx, segname, secname);
421 *name = res;
422 }
423
424 /* Convert a bfd section name to a Mach-O segment + section name.
425
426 If the name is a canonical one for which we have a Darwin match
427 return the translation table - which contains defaults for flags,
428 type, attribute and default alignment data.
429
430 Otherwise, expand the bfd_name (assumed to be in the form
431 "[LC_SEGMENT.]<segmentname>.<sectionname>") and return NULL. */
432
433 static const mach_o_section_name_xlat *
434 bfd_mach_o_convert_section_name_to_mach_o (bfd *abfd ATTRIBUTE_UNUSED,
435 asection *sect,
436 bfd_mach_o_section *section)
437 {
438 const mach_o_section_name_xlat *xlat;
439 const char *name = bfd_get_section_name (abfd, sect);
440 const char *segname;
441 const char *dot;
442 unsigned int len;
443 unsigned int seglen;
444 unsigned int seclen;
445
446 memset (section->segname, 0, BFD_MACH_O_SEGNAME_SIZE + 1);
447 memset (section->sectname, 0, BFD_MACH_O_SECTNAME_SIZE + 1);
448
449 /* See if is a canonical name ... */
450 xlat = bfd_mach_o_section_data_for_bfd_name (abfd, name, &segname);
451 if (xlat)
452 {
453 strcpy (section->segname, segname);
454 strcpy (section->sectname, xlat->mach_o_name);
455 return xlat;
456 }
457
458 /* .. else we convert our constructed one back to Mach-O.
459 Strip LC_SEGMENT. prefix, if present. */
460 if (strncmp (name, "LC_SEGMENT.", 11) == 0)
461 name += 11;
462
463 /* Find a dot. */
464 dot = strchr (name, '.');
465 len = strlen (name);
466
467 /* Try to split name into segment and section names. */
468 if (dot && dot != name)
469 {
470 seglen = dot - name;
471 seclen = len - (dot + 1 - name);
472
473 if (seglen <= BFD_MACH_O_SEGNAME_SIZE
474 && seclen <= BFD_MACH_O_SECTNAME_SIZE)
475 {
476 memcpy (section->segname, name, seglen);
477 section->segname[seglen] = 0;
478 memcpy (section->sectname, dot + 1, seclen);
479 section->sectname[seclen] = 0;
480 return NULL;
481 }
482 }
483
484 /* The segment and section names are both missing - don't make them
485 into dots. */
486 if (dot && dot == name)
487 return NULL;
488
489 /* Just duplicate the name into both segment and section. */
490 if (len > 16)
491 len = 16;
492 memcpy (section->segname, name, len);
493 section->segname[len] = 0;
494 memcpy (section->sectname, name, len);
495 section->sectname[len] = 0;
496 return NULL;
497 }
498
499 /* Return the size of an entry for section SEC.
500 Must be called only for symbol pointer section and symbol stubs
501 sections. */
502
503 unsigned int
504 bfd_mach_o_section_get_entry_size (bfd *abfd, bfd_mach_o_section *sec)
505 {
506 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
507 {
508 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
509 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
510 return bfd_mach_o_wide_p (abfd) ? 8 : 4;
511 case BFD_MACH_O_S_SYMBOL_STUBS:
512 return sec->reserved2;
513 default:
514 BFD_FAIL ();
515 return 0;
516 }
517 }
518
519 /* Return the number of indirect symbols for a section.
520 Must be called only for symbol pointer section and symbol stubs
521 sections. */
522
523 unsigned int
524 bfd_mach_o_section_get_nbr_indirect (bfd *abfd, bfd_mach_o_section *sec)
525 {
526 unsigned int elsz;
527
528 elsz = bfd_mach_o_section_get_entry_size (abfd, sec);
529 if (elsz == 0)
530 return 0;
531 else
532 return sec->size / elsz;
533 }
534
535 /* Append command CMD to ABFD. Note that header.ncmds is not updated. */
536
537 static void
538 bfd_mach_o_append_command (bfd *abfd, bfd_mach_o_load_command *cmd)
539 {
540 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
541
542 if (mdata->last_command != NULL)
543 mdata->last_command->next = cmd;
544 else
545 mdata->first_command = cmd;
546 mdata->last_command = cmd;
547 cmd->next = NULL;
548 }
549
550 /* Copy any private info we understand from the input symbol
551 to the output symbol. */
552
553 bfd_boolean
554 bfd_mach_o_bfd_copy_private_symbol_data (bfd *ibfd ATTRIBUTE_UNUSED,
555 asymbol *isymbol,
556 bfd *obfd ATTRIBUTE_UNUSED,
557 asymbol *osymbol)
558 {
559 bfd_mach_o_asymbol *os, *is;
560
561 os = (bfd_mach_o_asymbol *)osymbol;
562 is = (bfd_mach_o_asymbol *)isymbol;
563 os->n_type = is->n_type;
564 os->n_sect = is->n_sect;
565 os->n_desc = is->n_desc;
566 os->symbol.udata.i = is->symbol.udata.i;
567
568 return TRUE;
569 }
570
571 /* Copy any private info we understand from the input section
572 to the output section. */
573
574 bfd_boolean
575 bfd_mach_o_bfd_copy_private_section_data (bfd *ibfd, asection *isection,
576 bfd *obfd, asection *osection)
577 {
578 bfd_mach_o_section *os = bfd_mach_o_get_mach_o_section (osection);
579 bfd_mach_o_section *is = bfd_mach_o_get_mach_o_section (isection);
580
581 if (ibfd->xvec->flavour != bfd_target_mach_o_flavour
582 || obfd->xvec->flavour != bfd_target_mach_o_flavour)
583 return TRUE;
584
585 BFD_ASSERT (is != NULL && os != NULL);
586
587 os->flags = is->flags;
588 os->reserved1 = is->reserved1;
589 os->reserved2 = is->reserved2;
590 os->reserved3 = is->reserved3;
591
592 return TRUE;
593 }
594
595 /* Copy any private info we understand from the input bfd
596 to the output bfd. */
597
598 bfd_boolean
599 bfd_mach_o_bfd_copy_private_header_data (bfd *ibfd, bfd *obfd)
600 {
601 bfd_mach_o_data_struct *imdata;
602 bfd_mach_o_data_struct *omdata;
603 bfd_mach_o_load_command *icmd;
604
605 if (bfd_get_flavour (ibfd) != bfd_target_mach_o_flavour
606 || bfd_get_flavour (obfd) != bfd_target_mach_o_flavour)
607 return TRUE;
608
609 BFD_ASSERT (bfd_mach_o_valid (ibfd));
610 BFD_ASSERT (bfd_mach_o_valid (obfd));
611
612 imdata = bfd_mach_o_get_data (ibfd);
613 omdata = bfd_mach_o_get_data (obfd);
614
615 /* Copy header flags. */
616 omdata->header.flags = imdata->header.flags;
617
618 /* Copy commands. */
619 for (icmd = imdata->first_command; icmd != NULL; icmd = icmd->next)
620 {
621 bfd_mach_o_load_command *ocmd;
622
623 switch (icmd->type)
624 {
625 case BFD_MACH_O_LC_LOAD_DYLIB:
626 case BFD_MACH_O_LC_LOAD_DYLINKER:
627 case BFD_MACH_O_LC_DYLD_INFO:
628 /* Command is copied. */
629 ocmd = bfd_alloc (obfd, sizeof (bfd_mach_o_load_command));
630 if (ocmd == NULL)
631 return FALSE;
632
633 /* Copy common fields. */
634 ocmd->type = icmd->type;
635 ocmd->type_required = icmd->type_required;
636 ocmd->offset = 0;
637 ocmd->len = icmd->len;
638 break;
639
640 default:
641 /* Command is not copied. */
642 continue;
643 break;
644 }
645
646 switch (icmd->type)
647 {
648 case BFD_MACH_O_LC_LOAD_DYLIB:
649 {
650 bfd_mach_o_dylib_command *idy = &icmd->command.dylib;
651 bfd_mach_o_dylib_command *ody = &ocmd->command.dylib;
652
653 ody->name_offset = idy->name_offset;
654 ody->timestamp = idy->timestamp;
655 ody->current_version = idy->current_version;
656 ody->compatibility_version = idy->compatibility_version;
657 ody->name_str = idy->name_str;
658 }
659 break;
660
661 case BFD_MACH_O_LC_LOAD_DYLINKER:
662 {
663 bfd_mach_o_dylinker_command *idy = &icmd->command.dylinker;
664 bfd_mach_o_dylinker_command *ody = &ocmd->command.dylinker;
665
666 ody->name_offset = idy->name_offset;
667 ody->name_str = idy->name_str;
668 }
669 break;
670
671 case BFD_MACH_O_LC_DYLD_INFO:
672 {
673 bfd_mach_o_dyld_info_command *idy = &icmd->command.dyld_info;
674 bfd_mach_o_dyld_info_command *ody = &ocmd->command.dyld_info;
675
676 if (bfd_mach_o_read_dyld_content (ibfd, idy))
677 {
678 ody->rebase_size = idy->rebase_size;
679 ody->rebase_content = idy->rebase_content;
680
681 ody->bind_size = idy->bind_size;
682 ody->bind_content = idy->bind_content;
683
684 ody->weak_bind_size = idy->weak_bind_size;
685 ody->weak_bind_content = idy->weak_bind_content;
686
687 ody->lazy_bind_size = idy->lazy_bind_size;
688 ody->lazy_bind_content = idy->lazy_bind_content;
689
690 ody->export_size = idy->export_size;
691 ody->export_content = idy->export_content;
692 }
693 /* PR 17512L: file: 730e492d. */
694 else
695 {
696 ody->rebase_size =
697 ody->bind_size =
698 ody->weak_bind_size =
699 ody->lazy_bind_size =
700 ody->export_size = 0;
701 ody->rebase_content =
702 ody->bind_content =
703 ody->weak_bind_content =
704 ody->lazy_bind_content =
705 ody->export_content = NULL;
706 }
707 }
708 break;
709
710 default:
711 /* That command should be handled. */
712 abort ();
713 }
714
715 /* Insert command. */
716 bfd_mach_o_append_command (obfd, ocmd);
717 }
718
719 return TRUE;
720 }
721
722 /* This allows us to set up to 32 bits of flags (unless we invent some
723 fiendish scheme to subdivide). For now, we'll just set the file flags
724 without error checking - just overwrite. */
725
726 bfd_boolean
727 bfd_mach_o_bfd_set_private_flags (bfd *abfd, flagword flags)
728 {
729 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
730
731 if (!mdata)
732 return FALSE;
733
734 mdata->header.flags = flags;
735 return TRUE;
736 }
737
738 /* Count the total number of symbols. */
739
740 static long
741 bfd_mach_o_count_symbols (bfd *abfd)
742 {
743 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
744
745 if (mdata->symtab == NULL)
746 return 0;
747 return mdata->symtab->nsyms;
748 }
749
750 long
751 bfd_mach_o_get_symtab_upper_bound (bfd *abfd)
752 {
753 long nsyms = bfd_mach_o_count_symbols (abfd);
754
755 return ((nsyms + 1) * sizeof (asymbol *));
756 }
757
758 long
759 bfd_mach_o_canonicalize_symtab (bfd *abfd, asymbol **alocation)
760 {
761 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
762 long nsyms = bfd_mach_o_count_symbols (abfd);
763 bfd_mach_o_symtab_command *sym = mdata->symtab;
764 unsigned long j;
765
766 if (nsyms < 0)
767 return nsyms;
768
769 if (nsyms == 0)
770 {
771 /* Do not try to read symbols if there are none. */
772 alocation[0] = NULL;
773 return 0;
774 }
775
776 if (!bfd_mach_o_read_symtab_symbols (abfd))
777 {
778 _bfd_error_handler
779 (_("bfd_mach_o_canonicalize_symtab: unable to load symbols"));
780 return 0;
781 }
782
783 BFD_ASSERT (sym->symbols != NULL);
784
785 for (j = 0; j < sym->nsyms; j++)
786 alocation[j] = &sym->symbols[j].symbol;
787
788 alocation[j] = NULL;
789
790 return nsyms;
791 }
792
793 /* Create synthetic symbols for indirect symbols. */
794
795 long
796 bfd_mach_o_get_synthetic_symtab (bfd *abfd,
797 long symcount ATTRIBUTE_UNUSED,
798 asymbol **syms ATTRIBUTE_UNUSED,
799 long dynsymcount ATTRIBUTE_UNUSED,
800 asymbol **dynsyms ATTRIBUTE_UNUSED,
801 asymbol **ret)
802 {
803 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
804 bfd_mach_o_dysymtab_command *dysymtab = mdata->dysymtab;
805 bfd_mach_o_symtab_command *symtab = mdata->symtab;
806 asymbol *s;
807 char * s_start;
808 char * s_end;
809 unsigned long count, i, j, n;
810 size_t size;
811 char *names;
812 char *nul_name;
813 const char stub [] = "$stub";
814
815 *ret = NULL;
816
817 /* Stop now if no symbols or no indirect symbols. */
818 if (dysymtab == NULL || dysymtab->nindirectsyms == 0
819 || symtab == NULL || symtab->symbols == NULL)
820 return 0;
821
822 /* We need to allocate a bfd symbol for every indirect symbol and to
823 allocate the memory for its name. */
824 count = dysymtab->nindirectsyms;
825 size = count * sizeof (asymbol) + 1;
826
827 for (j = 0; j < count; j++)
828 {
829 const char * strng;
830 unsigned int isym = dysymtab->indirect_syms[j];
831
832 /* Some indirect symbols are anonymous. */
833 if (isym < symtab->nsyms && (strng = symtab->symbols[isym].symbol.name))
834 /* PR 17512: file: f5b8eeba. */
835 size += strnlen (strng, symtab->strsize - (strng - symtab->strtab)) + sizeof (stub);
836 }
837
838 s_start = bfd_malloc (size);
839 s = *ret = (asymbol *) s_start;
840 if (s == NULL)
841 return -1;
842 names = (char *) (s + count);
843 nul_name = names;
844 *names++ = 0;
845 s_end = s_start + size;
846
847 n = 0;
848 for (i = 0; i < mdata->nsects; i++)
849 {
850 bfd_mach_o_section *sec = mdata->sections[i];
851 unsigned int first, last;
852 bfd_vma addr;
853 bfd_vma entry_size;
854
855 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
856 {
857 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
858 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
859 case BFD_MACH_O_S_SYMBOL_STUBS:
860 /* Only these sections have indirect symbols. */
861 first = sec->reserved1;
862 last = first + bfd_mach_o_section_get_nbr_indirect (abfd, sec);
863 addr = sec->addr;
864 entry_size = bfd_mach_o_section_get_entry_size (abfd, sec);
865
866 /* PR 17512: file: 08e15eec. */
867 if (first >= count || last >= count || first > last)
868 goto fail;
869
870 for (j = first; j < last; j++)
871 {
872 unsigned int isym = dysymtab->indirect_syms[j];
873
874 /* PR 17512: file: 04d64d9b. */
875 if (((char *) s) + sizeof (* s) > s_end)
876 goto fail;
877
878 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
879 s->section = sec->bfdsection;
880 s->value = addr - sec->addr;
881 s->udata.p = NULL;
882
883 if (isym < symtab->nsyms
884 && symtab->symbols[isym].symbol.name)
885 {
886 const char *sym = symtab->symbols[isym].symbol.name;
887 size_t len;
888
889 s->name = names;
890 len = strlen (sym);
891 /* PR 17512: file: 47dfd4d2. */
892 if (names + len >= s_end)
893 goto fail;
894 memcpy (names, sym, len);
895 names += len;
896 /* PR 17512: file: 18f340a4. */
897 if (names + sizeof (stub) >= s_end)
898 goto fail;
899 memcpy (names, stub, sizeof (stub));
900 names += sizeof (stub);
901 }
902 else
903 s->name = nul_name;
904
905 addr += entry_size;
906 s++;
907 n++;
908 }
909 break;
910 default:
911 break;
912 }
913 }
914
915 return n;
916
917 fail:
918 free (s_start);
919 * ret = NULL;
920 return -1;
921 }
922
923 void
924 bfd_mach_o_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
925 asymbol *symbol,
926 symbol_info *ret)
927 {
928 bfd_symbol_info (symbol, ret);
929 }
930
931 void
932 bfd_mach_o_print_symbol (bfd *abfd,
933 void * afile,
934 asymbol *symbol,
935 bfd_print_symbol_type how)
936 {
937 FILE *file = (FILE *) afile;
938 const char *name;
939 bfd_mach_o_asymbol *asym = (bfd_mach_o_asymbol *)symbol;
940
941 switch (how)
942 {
943 case bfd_print_symbol_name:
944 fprintf (file, "%s", symbol->name);
945 break;
946 default:
947 bfd_print_symbol_vandf (abfd, (void *) file, symbol);
948 if (asym->n_type & BFD_MACH_O_N_STAB)
949 name = bfd_get_stab_name (asym->n_type);
950 else
951 switch (asym->n_type & BFD_MACH_O_N_TYPE)
952 {
953 case BFD_MACH_O_N_UNDF:
954 if (symbol->value == 0)
955 name = "UND";
956 else
957 name = "COM";
958 break;
959 case BFD_MACH_O_N_ABS:
960 name = "ABS";
961 break;
962 case BFD_MACH_O_N_INDR:
963 name = "INDR";
964 break;
965 case BFD_MACH_O_N_PBUD:
966 name = "PBUD";
967 break;
968 case BFD_MACH_O_N_SECT:
969 name = "SECT";
970 break;
971 default:
972 name = "???";
973 break;
974 }
975 if (name == NULL)
976 name = "";
977 fprintf (file, " %02x %-6s %02x %04x",
978 asym->n_type, name, asym->n_sect, asym->n_desc);
979 if ((asym->n_type & BFD_MACH_O_N_STAB) == 0
980 && (asym->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_SECT)
981 fprintf (file, " [%s]", symbol->section->name);
982 fprintf (file, " %s", symbol->name);
983 }
984 }
985
986 static void
987 bfd_mach_o_convert_architecture (bfd_mach_o_cpu_type mtype,
988 bfd_mach_o_cpu_subtype msubtype,
989 enum bfd_architecture *type,
990 unsigned long *subtype)
991 {
992 *subtype = bfd_arch_unknown;
993
994 switch (mtype)
995 {
996 case BFD_MACH_O_CPU_TYPE_VAX:
997 *type = bfd_arch_vax;
998 break;
999 case BFD_MACH_O_CPU_TYPE_MC680x0:
1000 *type = bfd_arch_m68k;
1001 break;
1002 case BFD_MACH_O_CPU_TYPE_I386:
1003 *type = bfd_arch_i386;
1004 *subtype = bfd_mach_i386_i386;
1005 break;
1006 case BFD_MACH_O_CPU_TYPE_X86_64:
1007 *type = bfd_arch_i386;
1008 *subtype = bfd_mach_x86_64;
1009 break;
1010 case BFD_MACH_O_CPU_TYPE_MIPS:
1011 *type = bfd_arch_mips;
1012 break;
1013 case BFD_MACH_O_CPU_TYPE_MC98000:
1014 *type = bfd_arch_m98k;
1015 break;
1016 case BFD_MACH_O_CPU_TYPE_HPPA:
1017 *type = bfd_arch_hppa;
1018 break;
1019 case BFD_MACH_O_CPU_TYPE_ARM:
1020 *type = bfd_arch_arm;
1021 switch (msubtype)
1022 {
1023 case BFD_MACH_O_CPU_SUBTYPE_ARM_V4T:
1024 *subtype = bfd_mach_arm_4T;
1025 break;
1026 case BFD_MACH_O_CPU_SUBTYPE_ARM_V6:
1027 *subtype = bfd_mach_arm_4T; /* Best fit ? */
1028 break;
1029 case BFD_MACH_O_CPU_SUBTYPE_ARM_V5TEJ:
1030 *subtype = bfd_mach_arm_5TE;
1031 break;
1032 case BFD_MACH_O_CPU_SUBTYPE_ARM_XSCALE:
1033 *subtype = bfd_mach_arm_XScale;
1034 break;
1035 case BFD_MACH_O_CPU_SUBTYPE_ARM_V7:
1036 *subtype = bfd_mach_arm_5TE; /* Best fit ? */
1037 break;
1038 case BFD_MACH_O_CPU_SUBTYPE_ARM_ALL:
1039 default:
1040 break;
1041 }
1042 break;
1043 case BFD_MACH_O_CPU_TYPE_MC88000:
1044 *type = bfd_arch_m88k;
1045 break;
1046 case BFD_MACH_O_CPU_TYPE_SPARC:
1047 *type = bfd_arch_sparc;
1048 *subtype = bfd_mach_sparc;
1049 break;
1050 case BFD_MACH_O_CPU_TYPE_I860:
1051 *type = bfd_arch_i860;
1052 break;
1053 case BFD_MACH_O_CPU_TYPE_ALPHA:
1054 *type = bfd_arch_alpha;
1055 break;
1056 case BFD_MACH_O_CPU_TYPE_POWERPC:
1057 *type = bfd_arch_powerpc;
1058 *subtype = bfd_mach_ppc;
1059 break;
1060 case BFD_MACH_O_CPU_TYPE_POWERPC_64:
1061 *type = bfd_arch_powerpc;
1062 *subtype = bfd_mach_ppc64;
1063 break;
1064 case BFD_MACH_O_CPU_TYPE_ARM64:
1065 *type = bfd_arch_aarch64;
1066 *subtype = bfd_mach_aarch64;
1067 break;
1068 default:
1069 *type = bfd_arch_unknown;
1070 break;
1071 }
1072 }
1073
1074 /* Write n NUL bytes to ABFD so that LEN + n is a multiple of 4. Return the
1075 number of bytes written or -1 in case of error. */
1076
1077 static int
1078 bfd_mach_o_pad4 (bfd *abfd, unsigned int len)
1079 {
1080 if (len % 4 != 0)
1081 {
1082 char pad[4] = {0,0,0,0};
1083 unsigned int padlen = 4 - (len % 4);
1084
1085 if (bfd_bwrite (pad, padlen, abfd) != padlen)
1086 return -1;
1087
1088 return padlen;
1089 }
1090 else
1091 return 0;
1092 }
1093
1094 /* Likewise, but for a command. */
1095
1096 static int
1097 bfd_mach_o_pad_command (bfd *abfd, unsigned int len)
1098 {
1099 unsigned int align = bfd_mach_o_wide_p (abfd) ? 8 : 4;
1100
1101 if (len % align != 0)
1102 {
1103 char pad[8] = {0};
1104 unsigned int padlen = align - (len % align);
1105
1106 if (bfd_bwrite (pad, padlen, abfd) != padlen)
1107 return -1;
1108
1109 return padlen;
1110 }
1111 else
1112 return 0;
1113 }
1114
1115 static bfd_boolean
1116 bfd_mach_o_write_header (bfd *abfd, bfd_mach_o_header *header)
1117 {
1118 struct mach_o_header_external raw;
1119 unsigned int size;
1120
1121 size = mach_o_wide_p (header) ?
1122 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
1123
1124 bfd_h_put_32 (abfd, header->magic, raw.magic);
1125 bfd_h_put_32 (abfd, header->cputype, raw.cputype);
1126 bfd_h_put_32 (abfd, header->cpusubtype, raw.cpusubtype);
1127 bfd_h_put_32 (abfd, header->filetype, raw.filetype);
1128 bfd_h_put_32 (abfd, header->ncmds, raw.ncmds);
1129 bfd_h_put_32 (abfd, header->sizeofcmds, raw.sizeofcmds);
1130 bfd_h_put_32 (abfd, header->flags, raw.flags);
1131
1132 if (mach_o_wide_p (header))
1133 bfd_h_put_32 (abfd, header->reserved, raw.reserved);
1134
1135 if (bfd_seek (abfd, 0, SEEK_SET) != 0
1136 || bfd_bwrite (&raw, size, abfd) != size)
1137 return FALSE;
1138
1139 return TRUE;
1140 }
1141
1142 static bfd_boolean
1143 bfd_mach_o_write_thread (bfd *abfd, bfd_mach_o_load_command *command)
1144 {
1145 bfd_mach_o_thread_command *cmd = &command->command.thread;
1146 unsigned int i;
1147 struct mach_o_thread_command_external raw;
1148 unsigned int offset;
1149
1150 BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD)
1151 || (command->type == BFD_MACH_O_LC_UNIXTHREAD));
1152
1153 offset = BFD_MACH_O_LC_SIZE;
1154 for (i = 0; i < cmd->nflavours; i++)
1155 {
1156 BFD_ASSERT ((cmd->flavours[i].size % 4) == 0);
1157 BFD_ASSERT (cmd->flavours[i].offset ==
1158 (command->offset + offset + BFD_MACH_O_LC_SIZE));
1159
1160 bfd_h_put_32 (abfd, cmd->flavours[i].flavour, raw.flavour);
1161 bfd_h_put_32 (abfd, (cmd->flavours[i].size / 4), raw.count);
1162
1163 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
1164 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1165 return FALSE;
1166
1167 offset += cmd->flavours[i].size + sizeof (raw);
1168 }
1169
1170 return TRUE;
1171 }
1172
1173 static bfd_boolean
1174 bfd_mach_o_write_dylinker (bfd *abfd, bfd_mach_o_load_command *command)
1175 {
1176 bfd_mach_o_dylinker_command *cmd = &command->command.dylinker;
1177 struct mach_o_str_command_external raw;
1178 unsigned int namelen;
1179
1180 bfd_h_put_32 (abfd, cmd->name_offset, raw.str);
1181
1182 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1183 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1184 return FALSE;
1185
1186 namelen = strlen (cmd->name_str) + 1;
1187 if (bfd_bwrite (cmd->name_str, namelen, abfd) != namelen)
1188 return FALSE;
1189
1190 if (bfd_mach_o_pad_command (abfd, namelen) < 0)
1191 return FALSE;
1192
1193 return TRUE;
1194 }
1195
1196 static bfd_boolean
1197 bfd_mach_o_write_dylib (bfd *abfd, bfd_mach_o_load_command *command)
1198 {
1199 bfd_mach_o_dylib_command *cmd = &command->command.dylib;
1200 struct mach_o_dylib_command_external raw;
1201 unsigned int namelen;
1202
1203 bfd_h_put_32 (abfd, cmd->name_offset, raw.name);
1204 bfd_h_put_32 (abfd, cmd->timestamp, raw.timestamp);
1205 bfd_h_put_32 (abfd, cmd->current_version, raw.current_version);
1206 bfd_h_put_32 (abfd, cmd->compatibility_version, raw.compatibility_version);
1207
1208 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1209 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1210 return FALSE;
1211
1212 namelen = strlen (cmd->name_str) + 1;
1213 if (bfd_bwrite (cmd->name_str, namelen, abfd) != namelen)
1214 return FALSE;
1215
1216 if (bfd_mach_o_pad_command (abfd, namelen) < 0)
1217 return FALSE;
1218
1219 return TRUE;
1220 }
1221
1222 static bfd_boolean
1223 bfd_mach_o_write_main (bfd *abfd, bfd_mach_o_load_command *command)
1224 {
1225 bfd_mach_o_main_command *cmd = &command->command.main;
1226 struct mach_o_entry_point_command_external raw;
1227
1228 bfd_h_put_64 (abfd, cmd->entryoff, raw.entryoff);
1229 bfd_h_put_64 (abfd, cmd->stacksize, raw.stacksize);
1230
1231 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1232 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1233 return FALSE;
1234
1235 return TRUE;
1236 }
1237
1238 static bfd_boolean
1239 bfd_mach_o_write_dyld_info (bfd *abfd, bfd_mach_o_load_command *command)
1240 {
1241 bfd_mach_o_dyld_info_command *cmd = &command->command.dyld_info;
1242 struct mach_o_dyld_info_command_external raw;
1243
1244 bfd_h_put_32 (abfd, cmd->rebase_off, raw.rebase_off);
1245 bfd_h_put_32 (abfd, cmd->rebase_size, raw.rebase_size);
1246 bfd_h_put_32 (abfd, cmd->bind_off, raw.bind_off);
1247 bfd_h_put_32 (abfd, cmd->bind_size, raw.bind_size);
1248 bfd_h_put_32 (abfd, cmd->weak_bind_off, raw.weak_bind_off);
1249 bfd_h_put_32 (abfd, cmd->weak_bind_size, raw.weak_bind_size);
1250 bfd_h_put_32 (abfd, cmd->lazy_bind_off, raw.lazy_bind_off);
1251 bfd_h_put_32 (abfd, cmd->lazy_bind_size, raw.lazy_bind_size);
1252 bfd_h_put_32 (abfd, cmd->export_off, raw.export_off);
1253 bfd_h_put_32 (abfd, cmd->export_size, raw.export_size);
1254
1255 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1256 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1257 return FALSE;
1258
1259 if (cmd->rebase_size != 0)
1260 if (bfd_seek (abfd, cmd->rebase_off, SEEK_SET) != 0
1261 || (bfd_bwrite (cmd->rebase_content, cmd->rebase_size, abfd) !=
1262 cmd->rebase_size))
1263 return FALSE;
1264
1265 if (cmd->bind_size != 0)
1266 if (bfd_seek (abfd, cmd->bind_off, SEEK_SET) != 0
1267 || (bfd_bwrite (cmd->bind_content, cmd->bind_size, abfd) !=
1268 cmd->bind_size))
1269 return FALSE;
1270
1271 if (cmd->weak_bind_size != 0)
1272 if (bfd_seek (abfd, cmd->weak_bind_off, SEEK_SET) != 0
1273 || (bfd_bwrite (cmd->weak_bind_content, cmd->weak_bind_size, abfd) !=
1274 cmd->weak_bind_size))
1275 return FALSE;
1276
1277 if (cmd->lazy_bind_size != 0)
1278 if (bfd_seek (abfd, cmd->lazy_bind_off, SEEK_SET) != 0
1279 || (bfd_bwrite (cmd->lazy_bind_content, cmd->lazy_bind_size, abfd) !=
1280 cmd->lazy_bind_size))
1281 return FALSE;
1282
1283 if (cmd->export_size != 0)
1284 if (bfd_seek (abfd, cmd->export_off, SEEK_SET) != 0
1285 || (bfd_bwrite (cmd->export_content, cmd->export_size, abfd) !=
1286 cmd->export_size))
1287 return FALSE;
1288
1289 return TRUE;
1290 }
1291
1292 long
1293 bfd_mach_o_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
1294 asection *asect)
1295 {
1296 return (asect->reloc_count + 1) * sizeof (arelent *);
1297 }
1298
1299 /* In addition to the need to byte-swap the symbol number, the bit positions
1300 of the fields in the relocation information vary per target endian-ness. */
1301
1302 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 /* Set syms_ptr_ptr and addend of RES. */
1329
1330 bfd_boolean
1331 bfd_mach_o_canonicalize_non_scattered_reloc (bfd *abfd,
1332 bfd_mach_o_reloc_info *reloc,
1333 arelent *res, asymbol **syms)
1334 {
1335 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1336 unsigned int num;
1337 asymbol **sym;
1338
1339 /* Non-scattered relocation. */
1340 reloc->r_scattered = 0;
1341 res->addend = 0;
1342
1343 num = reloc->r_value;
1344
1345 if (reloc->r_extern)
1346 {
1347 /* PR 17512: file: 8396-1185-0.004. */
1348 if (num >= (unsigned) bfd_mach_o_count_symbols (abfd))
1349 sym = bfd_und_section_ptr->symbol_ptr_ptr;
1350 else if (syms == NULL)
1351 sym = bfd_und_section_ptr->symbol_ptr_ptr;
1352 else
1353 /* An external symbol number. */
1354 sym = syms + num;
1355 }
1356 else if (num == 0x00ffffff || num == 0)
1357 {
1358 /* The 'symnum' in a non-scattered PAIR is 0x00ffffff. But as this
1359 is generic code, we don't know wether this is really a PAIR.
1360 This value is almost certainly not a valid section number, hence
1361 this specific case to avoid an assertion failure.
1362 Target specific swap_reloc_in routine should adjust that. */
1363 sym = bfd_abs_section_ptr->symbol_ptr_ptr;
1364 }
1365 else
1366 {
1367 /* PR 17512: file: 006-2964-0.004. */
1368 if (num > mdata->nsects)
1369 return FALSE;
1370
1371 /* A section number. */
1372 sym = mdata->sections[num - 1]->bfdsection->symbol_ptr_ptr;
1373 /* For a symbol defined in section S, the addend (stored in the
1374 binary) contains the address of the section. To comply with
1375 bfd convention, subtract the section address.
1376 Use the address from the header, so that the user can modify
1377 the vma of the section. */
1378 res->addend = -mdata->sections[num - 1]->addr;
1379 }
1380
1381 /* Note: Pairs for PPC LO/HI/HA are not scattered, but contain the offset
1382 in the lower 16bits of the address value. So we have to find the
1383 'symbol' from the preceding reloc. We do this even though the
1384 section symbol is probably not needed here, because NULL symbol
1385 values cause an assert in generic BFD code. This must be done in
1386 the PPC swap_reloc_in routine. */
1387 res->sym_ptr_ptr = sym;
1388
1389 return TRUE;
1390 }
1391
1392 /* Do most of the work for canonicalize_relocs on RAW: create internal
1393 representation RELOC and set most fields of RES using symbol table SYMS.
1394 Each target still has to set the howto of RES and possibly adjust other
1395 fields.
1396 Previously the Mach-O hook point was simply swap_in, but some targets
1397 (like arm64) don't follow the generic rules (symnum is a value for the
1398 non-scattered relocation ADDEND). */
1399
1400 bfd_boolean
1401 bfd_mach_o_pre_canonicalize_one_reloc (bfd *abfd,
1402 struct mach_o_reloc_info_external *raw,
1403 bfd_mach_o_reloc_info *reloc,
1404 arelent *res, asymbol **syms)
1405 {
1406 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1407 bfd_vma addr;
1408
1409 addr = bfd_get_32 (abfd, raw->r_address);
1410 res->sym_ptr_ptr = NULL;
1411 res->addend = 0;
1412
1413 if (addr & BFD_MACH_O_SR_SCATTERED)
1414 {
1415 unsigned int j;
1416 bfd_vma symnum = bfd_get_32 (abfd, raw->r_symbolnum);
1417
1418 /* Scattered relocation, can't be extern. */
1419 reloc->r_scattered = 1;
1420 reloc->r_extern = 0;
1421
1422 /* Extract section and offset from r_value (symnum). */
1423 reloc->r_value = symnum;
1424 /* FIXME: This breaks when a symbol in a reloc exactly follows the
1425 end of the data for the section (e.g. in a calculation of section
1426 data length). At present, the symbol will end up associated with
1427 the following section or, if it falls within alignment padding, as
1428 null - which will assert later. */
1429 for (j = 0; j < mdata->nsects; j++)
1430 {
1431 bfd_mach_o_section *sect = mdata->sections[j];
1432 if (symnum >= sect->addr && symnum < sect->addr + sect->size)
1433 {
1434 res->sym_ptr_ptr = sect->bfdsection->symbol_ptr_ptr;
1435 res->addend = symnum - sect->addr;
1436 break;
1437 }
1438 }
1439
1440 /* Extract the info and address fields from r_address. */
1441 reloc->r_type = BFD_MACH_O_GET_SR_TYPE (addr);
1442 reloc->r_length = BFD_MACH_O_GET_SR_LENGTH (addr);
1443 reloc->r_pcrel = addr & BFD_MACH_O_SR_PCREL;
1444 reloc->r_address = BFD_MACH_O_GET_SR_TYPE (addr);
1445 res->address = BFD_MACH_O_GET_SR_ADDRESS (addr);
1446 }
1447 else
1448 {
1449 /* Non-scattered relocation. */
1450 reloc->r_scattered = 0;
1451 reloc->r_address = addr;
1452 res->address = addr;
1453
1454 /* The value and info fields have to be extracted dependent on target
1455 endian-ness. */
1456 bfd_mach_o_swap_in_non_scattered_reloc (abfd, reloc, raw->r_symbolnum);
1457
1458 if (!bfd_mach_o_canonicalize_non_scattered_reloc (abfd, reloc,
1459 res, syms))
1460 return FALSE;
1461 }
1462
1463 /* We have set up a reloc with all the information present, so the swapper
1464 can modify address, value and addend fields, if necessary, to convey
1465 information in the generic BFD reloc that is mach-o specific. */
1466
1467 return TRUE;
1468 }
1469
1470 static int
1471 bfd_mach_o_canonicalize_relocs (bfd *abfd, unsigned long filepos,
1472 unsigned long count,
1473 arelent *res, asymbol **syms)
1474 {
1475 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1476 unsigned long i;
1477 struct mach_o_reloc_info_external *native_relocs;
1478 bfd_size_type native_size;
1479
1480 /* Allocate and read relocs. */
1481 native_size = count * BFD_MACH_O_RELENT_SIZE;
1482
1483 /* PR 17512: file: 09477b57. */
1484 if (native_size < count)
1485 return -1;
1486
1487 native_relocs =
1488 (struct mach_o_reloc_info_external *) bfd_malloc (native_size);
1489 if (native_relocs == NULL)
1490 return -1;
1491
1492 if (bfd_seek (abfd, filepos, SEEK_SET) != 0
1493 || bfd_bread (native_relocs, native_size, abfd) != native_size)
1494 goto err;
1495
1496 for (i = 0; i < count; i++)
1497 {
1498 if (!(*bed->_bfd_mach_o_canonicalize_one_reloc)(abfd, &native_relocs[i],
1499 &res[i], syms))
1500 goto err;
1501 }
1502 free (native_relocs);
1503 return i;
1504 err:
1505 free (native_relocs);
1506 return -1;
1507 }
1508
1509 long
1510 bfd_mach_o_canonicalize_reloc (bfd *abfd, asection *asect,
1511 arelent **rels, asymbol **syms)
1512 {
1513 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1514 unsigned long i;
1515 arelent *res;
1516
1517 if (asect->reloc_count == 0)
1518 return 0;
1519
1520 /* No need to go further if we don't know how to read relocs. */
1521 if (bed->_bfd_mach_o_canonicalize_one_reloc == NULL)
1522 return 0;
1523
1524 if (asect->relocation == NULL)
1525 {
1526 if (asect->reloc_count * sizeof (arelent) < asect->reloc_count)
1527 return -1;
1528 res = bfd_malloc (asect->reloc_count * sizeof (arelent));
1529 if (res == NULL)
1530 return -1;
1531
1532 if (bfd_mach_o_canonicalize_relocs (abfd, asect->rel_filepos,
1533 asect->reloc_count, res, syms) < 0)
1534 {
1535 free (res);
1536 return -1;
1537 }
1538 asect->relocation = res;
1539 }
1540
1541 res = asect->relocation;
1542 for (i = 0; i < asect->reloc_count; i++)
1543 rels[i] = &res[i];
1544 rels[i] = NULL;
1545
1546 return i;
1547 }
1548
1549 long
1550 bfd_mach_o_get_dynamic_reloc_upper_bound (bfd *abfd)
1551 {
1552 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1553
1554 if (mdata->dysymtab == NULL)
1555 return 1;
1556 return (mdata->dysymtab->nextrel + mdata->dysymtab->nlocrel + 1)
1557 * sizeof (arelent *);
1558 }
1559
1560 long
1561 bfd_mach_o_canonicalize_dynamic_reloc (bfd *abfd, arelent **rels,
1562 struct bfd_symbol **syms)
1563 {
1564 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1565 bfd_mach_o_dysymtab_command *dysymtab = mdata->dysymtab;
1566 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1567 unsigned long i;
1568 arelent *res;
1569
1570 if (dysymtab == NULL)
1571 return 0;
1572 if (dysymtab->nextrel == 0 && dysymtab->nlocrel == 0)
1573 return 0;
1574
1575 /* No need to go further if we don't know how to read relocs. */
1576 if (bed->_bfd_mach_o_canonicalize_one_reloc == NULL)
1577 return 0;
1578
1579 if (mdata->dyn_reloc_cache == NULL)
1580 {
1581 if ((dysymtab->nextrel + dysymtab->nlocrel) * sizeof (arelent)
1582 < (dysymtab->nextrel + dysymtab->nlocrel))
1583 return -1;
1584
1585 res = bfd_malloc ((dysymtab->nextrel + dysymtab->nlocrel)
1586 * sizeof (arelent));
1587 if (res == NULL)
1588 return -1;
1589
1590 if (bfd_mach_o_canonicalize_relocs (abfd, dysymtab->extreloff,
1591 dysymtab->nextrel, res, syms) < 0)
1592 {
1593 free (res);
1594 return -1;
1595 }
1596
1597 if (bfd_mach_o_canonicalize_relocs (abfd, dysymtab->locreloff,
1598 dysymtab->nlocrel,
1599 res + dysymtab->nextrel, syms) < 0)
1600 {
1601 free (res);
1602 return -1;
1603 }
1604
1605 mdata->dyn_reloc_cache = res;
1606 }
1607
1608 res = mdata->dyn_reloc_cache;
1609 for (i = 0; i < dysymtab->nextrel + dysymtab->nlocrel; i++)
1610 rels[i] = &res[i];
1611 rels[i] = NULL;
1612 return i;
1613 }
1614
1615 /* In addition to the need to byte-swap the symbol number, the bit positions
1616 of the fields in the relocation information vary per target endian-ness. */
1617
1618 static void
1619 bfd_mach_o_swap_out_non_scattered_reloc (bfd *abfd, unsigned char *fields,
1620 bfd_mach_o_reloc_info *rel)
1621 {
1622 unsigned char info = 0;
1623
1624 BFD_ASSERT (rel->r_type <= 15);
1625 BFD_ASSERT (rel->r_length <= 3);
1626
1627 if (bfd_big_endian (abfd))
1628 {
1629 fields[0] = (rel->r_value >> 16) & 0xff;
1630 fields[1] = (rel->r_value >> 8) & 0xff;
1631 fields[2] = rel->r_value & 0xff;
1632 info |= rel->r_type << BFD_MACH_O_BE_TYPE_SHIFT;
1633 info |= rel->r_pcrel ? BFD_MACH_O_BE_PCREL : 0;
1634 info |= rel->r_length << BFD_MACH_O_BE_LENGTH_SHIFT;
1635 info |= rel->r_extern ? BFD_MACH_O_BE_EXTERN : 0;
1636 }
1637 else
1638 {
1639 fields[2] = (rel->r_value >> 16) & 0xff;
1640 fields[1] = (rel->r_value >> 8) & 0xff;
1641 fields[0] = rel->r_value & 0xff;
1642 info |= rel->r_type << BFD_MACH_O_LE_TYPE_SHIFT;
1643 info |= rel->r_pcrel ? BFD_MACH_O_LE_PCREL : 0;
1644 info |= rel->r_length << BFD_MACH_O_LE_LENGTH_SHIFT;
1645 info |= rel->r_extern ? BFD_MACH_O_LE_EXTERN : 0;
1646 }
1647 fields[3] = info;
1648 }
1649
1650 static bfd_boolean
1651 bfd_mach_o_write_relocs (bfd *abfd, bfd_mach_o_section *section)
1652 {
1653 unsigned int i;
1654 arelent **entries;
1655 asection *sec;
1656 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1657
1658 sec = section->bfdsection;
1659 if (sec->reloc_count == 0)
1660 return TRUE;
1661
1662 if (bed->_bfd_mach_o_swap_reloc_out == NULL)
1663 return TRUE;
1664
1665 if (bfd_seek (abfd, section->reloff, SEEK_SET) != 0)
1666 return FALSE;
1667
1668 /* Convert and write. */
1669 entries = section->bfdsection->orelocation;
1670 for (i = 0; i < section->nreloc; i++)
1671 {
1672 arelent *rel = entries[i];
1673 struct mach_o_reloc_info_external raw;
1674 bfd_mach_o_reloc_info info, *pinfo = &info;
1675
1676 /* Convert relocation to an intermediate representation. */
1677 if (!(*bed->_bfd_mach_o_swap_reloc_out) (rel, pinfo))
1678 return FALSE;
1679
1680 /* Lower the relocation info. */
1681 if (pinfo->r_scattered)
1682 {
1683 unsigned long v;
1684
1685 v = BFD_MACH_O_SR_SCATTERED
1686 | (pinfo->r_pcrel ? BFD_MACH_O_SR_PCREL : 0)
1687 | BFD_MACH_O_SET_SR_LENGTH (pinfo->r_length)
1688 | BFD_MACH_O_SET_SR_TYPE (pinfo->r_type)
1689 | BFD_MACH_O_SET_SR_ADDRESS (pinfo->r_address);
1690 /* Note: scattered relocs have field in reverse order... */
1691 bfd_put_32 (abfd, v, raw.r_address);
1692 bfd_put_32 (abfd, pinfo->r_value, raw.r_symbolnum);
1693 }
1694 else
1695 {
1696 bfd_put_32 (abfd, pinfo->r_address, raw.r_address);
1697 bfd_mach_o_swap_out_non_scattered_reloc (abfd, raw.r_symbolnum,
1698 pinfo);
1699 }
1700
1701 if (bfd_bwrite (&raw, BFD_MACH_O_RELENT_SIZE, abfd)
1702 != BFD_MACH_O_RELENT_SIZE)
1703 return FALSE;
1704 }
1705 return TRUE;
1706 }
1707
1708 static bfd_boolean
1709 bfd_mach_o_write_section_32 (bfd *abfd, bfd_mach_o_section *section)
1710 {
1711 struct mach_o_section_32_external raw;
1712
1713 memcpy (raw.sectname, section->sectname, 16);
1714 memcpy (raw.segname, section->segname, 16);
1715 bfd_h_put_32 (abfd, section->addr, raw.addr);
1716 bfd_h_put_32 (abfd, section->size, raw.size);
1717 bfd_h_put_32 (abfd, section->offset, raw.offset);
1718 bfd_h_put_32 (abfd, section->align, raw.align);
1719 bfd_h_put_32 (abfd, section->reloff, raw.reloff);
1720 bfd_h_put_32 (abfd, section->nreloc, raw.nreloc);
1721 bfd_h_put_32 (abfd, section->flags, raw.flags);
1722 bfd_h_put_32 (abfd, section->reserved1, raw.reserved1);
1723 bfd_h_put_32 (abfd, section->reserved2, raw.reserved2);
1724
1725 if (bfd_bwrite (&raw, BFD_MACH_O_SECTION_SIZE, abfd)
1726 != BFD_MACH_O_SECTION_SIZE)
1727 return FALSE;
1728
1729 return TRUE;
1730 }
1731
1732 static bfd_boolean
1733 bfd_mach_o_write_section_64 (bfd *abfd, bfd_mach_o_section *section)
1734 {
1735 struct mach_o_section_64_external raw;
1736
1737 memcpy (raw.sectname, section->sectname, 16);
1738 memcpy (raw.segname, section->segname, 16);
1739 bfd_h_put_64 (abfd, section->addr, raw.addr);
1740 bfd_h_put_64 (abfd, section->size, raw.size);
1741 bfd_h_put_32 (abfd, section->offset, raw.offset);
1742 bfd_h_put_32 (abfd, section->align, raw.align);
1743 bfd_h_put_32 (abfd, section->reloff, raw.reloff);
1744 bfd_h_put_32 (abfd, section->nreloc, raw.nreloc);
1745 bfd_h_put_32 (abfd, section->flags, raw.flags);
1746 bfd_h_put_32 (abfd, section->reserved1, raw.reserved1);
1747 bfd_h_put_32 (abfd, section->reserved2, raw.reserved2);
1748 bfd_h_put_32 (abfd, section->reserved3, raw.reserved3);
1749
1750 if (bfd_bwrite (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd)
1751 != BFD_MACH_O_SECTION_64_SIZE)
1752 return FALSE;
1753
1754 return TRUE;
1755 }
1756
1757 static bfd_boolean
1758 bfd_mach_o_write_segment_32 (bfd *abfd, bfd_mach_o_load_command *command)
1759 {
1760 struct mach_o_segment_command_32_external raw;
1761 bfd_mach_o_segment_command *seg = &command->command.segment;
1762 bfd_mach_o_section *sec;
1763
1764 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT);
1765
1766 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1767 if (!bfd_mach_o_write_relocs (abfd, sec))
1768 return FALSE;
1769
1770 memcpy (raw.segname, seg->segname, 16);
1771 bfd_h_put_32 (abfd, seg->vmaddr, raw.vmaddr);
1772 bfd_h_put_32 (abfd, seg->vmsize, raw.vmsize);
1773 bfd_h_put_32 (abfd, seg->fileoff, raw.fileoff);
1774 bfd_h_put_32 (abfd, seg->filesize, raw.filesize);
1775 bfd_h_put_32 (abfd, seg->maxprot, raw.maxprot);
1776 bfd_h_put_32 (abfd, seg->initprot, raw.initprot);
1777 bfd_h_put_32 (abfd, seg->nsects, raw.nsects);
1778 bfd_h_put_32 (abfd, seg->flags, raw.flags);
1779
1780 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1781 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1782 return FALSE;
1783
1784 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1785 if (!bfd_mach_o_write_section_32 (abfd, sec))
1786 return FALSE;
1787
1788 return TRUE;
1789 }
1790
1791 static bfd_boolean
1792 bfd_mach_o_write_segment_64 (bfd *abfd, bfd_mach_o_load_command *command)
1793 {
1794 struct mach_o_segment_command_64_external raw;
1795 bfd_mach_o_segment_command *seg = &command->command.segment;
1796 bfd_mach_o_section *sec;
1797
1798 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64);
1799
1800 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1801 if (!bfd_mach_o_write_relocs (abfd, sec))
1802 return FALSE;
1803
1804 memcpy (raw.segname, seg->segname, 16);
1805 bfd_h_put_64 (abfd, seg->vmaddr, raw.vmaddr);
1806 bfd_h_put_64 (abfd, seg->vmsize, raw.vmsize);
1807 bfd_h_put_64 (abfd, seg->fileoff, raw.fileoff);
1808 bfd_h_put_64 (abfd, seg->filesize, raw.filesize);
1809 bfd_h_put_32 (abfd, seg->maxprot, raw.maxprot);
1810 bfd_h_put_32 (abfd, seg->initprot, raw.initprot);
1811 bfd_h_put_32 (abfd, seg->nsects, raw.nsects);
1812 bfd_h_put_32 (abfd, seg->flags, raw.flags);
1813
1814 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1815 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1816 return FALSE;
1817
1818 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1819 if (!bfd_mach_o_write_section_64 (abfd, sec))
1820 return FALSE;
1821
1822 return TRUE;
1823 }
1824
1825 static bfd_boolean
1826 bfd_mach_o_write_symtab_content (bfd *abfd, bfd_mach_o_symtab_command *sym)
1827 {
1828 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1829 unsigned long i;
1830 unsigned int wide = bfd_mach_o_wide_p (abfd);
1831 struct bfd_strtab_hash *strtab;
1832 asymbol **symbols = bfd_get_outsymbols (abfd);
1833 int padlen;
1834
1835 /* Write the symbols first. */
1836 if (bfd_seek (abfd, sym->symoff, SEEK_SET) != 0)
1837 return FALSE;
1838
1839 strtab = _bfd_stringtab_init ();
1840 if (strtab == NULL)
1841 return FALSE;
1842
1843 if (sym->nsyms > 0)
1844 /* Although we don't strictly need to do this, for compatibility with
1845 Darwin system tools, actually output an empty string for the index
1846 0 entry. */
1847 _bfd_stringtab_add (strtab, "", TRUE, FALSE);
1848
1849 for (i = 0; i < sym->nsyms; i++)
1850 {
1851 bfd_size_type str_index;
1852 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
1853
1854 if (s->symbol.name == 0 || s->symbol.name[0] == '\0')
1855 /* An index of 0 always means the empty string. */
1856 str_index = 0;
1857 else
1858 {
1859 str_index = _bfd_stringtab_add (strtab, s->symbol.name, TRUE, FALSE);
1860
1861 if (str_index == (bfd_size_type) -1)
1862 goto err;
1863 }
1864
1865 if (wide)
1866 {
1867 struct mach_o_nlist_64_external raw;
1868
1869 bfd_h_put_32 (abfd, str_index, raw.n_strx);
1870 bfd_h_put_8 (abfd, s->n_type, raw.n_type);
1871 bfd_h_put_8 (abfd, s->n_sect, raw.n_sect);
1872 bfd_h_put_16 (abfd, s->n_desc, raw.n_desc);
1873 bfd_h_put_64 (abfd, s->symbol.section->vma + s->symbol.value,
1874 raw.n_value);
1875
1876 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1877 goto err;
1878 }
1879 else
1880 {
1881 struct mach_o_nlist_external raw;
1882
1883 bfd_h_put_32 (abfd, str_index, raw.n_strx);
1884 bfd_h_put_8 (abfd, s->n_type, raw.n_type);
1885 bfd_h_put_8 (abfd, s->n_sect, raw.n_sect);
1886 bfd_h_put_16 (abfd, s->n_desc, raw.n_desc);
1887 bfd_h_put_32 (abfd, s->symbol.section->vma + s->symbol.value,
1888 raw.n_value);
1889
1890 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1891 goto err;
1892 }
1893 }
1894 sym->strsize = _bfd_stringtab_size (strtab);
1895 sym->stroff = mdata->filelen;
1896 mdata->filelen += sym->strsize;
1897
1898 if (bfd_seek (abfd, sym->stroff, SEEK_SET) != 0)
1899 goto err;
1900
1901 if (_bfd_stringtab_emit (abfd, strtab) != TRUE)
1902 goto err;
1903
1904 /* Pad string table. */
1905 padlen = bfd_mach_o_pad4 (abfd, sym->strsize);
1906 if (padlen < 0)
1907 return FALSE;
1908 mdata->filelen += padlen;
1909 sym->strsize += padlen;
1910
1911 return TRUE;
1912
1913 err:
1914 _bfd_stringtab_free (strtab);
1915 sym->strsize = 0;
1916 return FALSE;
1917 }
1918
1919 static bfd_boolean
1920 bfd_mach_o_write_symtab (bfd *abfd, bfd_mach_o_load_command *command)
1921 {
1922 bfd_mach_o_symtab_command *sym = &command->command.symtab;
1923 struct mach_o_symtab_command_external raw;
1924
1925 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB);
1926
1927 /* The command. */
1928 bfd_h_put_32 (abfd, sym->symoff, raw.symoff);
1929 bfd_h_put_32 (abfd, sym->nsyms, raw.nsyms);
1930 bfd_h_put_32 (abfd, sym->stroff, raw.stroff);
1931 bfd_h_put_32 (abfd, sym->strsize, raw.strsize);
1932
1933 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1934 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1935 return FALSE;
1936
1937 return TRUE;
1938 }
1939
1940 /* Count the number of indirect symbols in the image.
1941 Requires that the sections are in their final order. */
1942
1943 static unsigned int
1944 bfd_mach_o_count_indirect_symbols (bfd *abfd, bfd_mach_o_data_struct *mdata)
1945 {
1946 unsigned int i;
1947 unsigned int nisyms = 0;
1948
1949 for (i = 0; i < mdata->nsects; ++i)
1950 {
1951 bfd_mach_o_section *sec = mdata->sections[i];
1952
1953 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
1954 {
1955 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
1956 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
1957 case BFD_MACH_O_S_SYMBOL_STUBS:
1958 nisyms += bfd_mach_o_section_get_nbr_indirect (abfd, sec);
1959 break;
1960 default:
1961 break;
1962 }
1963 }
1964 return nisyms;
1965 }
1966
1967 /* Create the dysymtab. */
1968
1969 static bfd_boolean
1970 bfd_mach_o_build_dysymtab (bfd *abfd, bfd_mach_o_dysymtab_command *cmd)
1971 {
1972 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1973
1974 /* TODO:
1975 We are not going to try and fill these in yet and, moreover, we are
1976 going to bail if they are already set. */
1977 if (cmd->nmodtab != 0
1978 || cmd->ntoc != 0
1979 || cmd->nextrefsyms != 0)
1980 {
1981 _bfd_error_handler (_("sorry: modtab, toc and extrefsyms are not yet"
1982 " implemented for dysymtab commands."));
1983 return FALSE;
1984 }
1985
1986 cmd->ilocalsym = 0;
1987
1988 if (bfd_get_symcount (abfd) > 0)
1989 {
1990 asymbol **symbols = bfd_get_outsymbols (abfd);
1991 unsigned long i;
1992
1993 /* Count the number of each kind of symbol. */
1994 for (i = 0; i < bfd_get_symcount (abfd); ++i)
1995 {
1996 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
1997 if (s->n_type & (BFD_MACH_O_N_EXT | BFD_MACH_O_N_PEXT))
1998 break;
1999 }
2000 cmd->nlocalsym = i;
2001 cmd->iextdefsym = i;
2002 for (; i < bfd_get_symcount (abfd); ++i)
2003 {
2004 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2005 if ((s->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_UNDF)
2006 break;
2007 }
2008 cmd->nextdefsym = i - cmd->nlocalsym;
2009 cmd->iundefsym = cmd->nextdefsym + cmd->iextdefsym;
2010 cmd->nundefsym = bfd_get_symcount (abfd)
2011 - cmd->nlocalsym
2012 - cmd->nextdefsym;
2013 }
2014 else
2015 {
2016 cmd->nlocalsym = 0;
2017 cmd->iextdefsym = 0;
2018 cmd->nextdefsym = 0;
2019 cmd->iundefsym = 0;
2020 cmd->nundefsym = 0;
2021 }
2022
2023 cmd->nindirectsyms = bfd_mach_o_count_indirect_symbols (abfd, mdata);
2024 if (cmd->nindirectsyms > 0)
2025 {
2026 unsigned i;
2027 unsigned n;
2028
2029 mdata->filelen = FILE_ALIGN (mdata->filelen, 2);
2030 cmd->indirectsymoff = mdata->filelen;
2031 mdata->filelen += cmd->nindirectsyms * 4;
2032
2033 if (cmd->nindirectsyms * 4 < cmd->nindirectsyms)
2034 return FALSE;
2035 cmd->indirect_syms = bfd_zalloc (abfd, cmd->nindirectsyms * 4);
2036 if (cmd->indirect_syms == NULL)
2037 return FALSE;
2038
2039 n = 0;
2040 for (i = 0; i < mdata->nsects; ++i)
2041 {
2042 bfd_mach_o_section *sec = mdata->sections[i];
2043
2044 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2045 {
2046 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
2047 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
2048 case BFD_MACH_O_S_SYMBOL_STUBS:
2049 {
2050 unsigned j, num;
2051 bfd_mach_o_asymbol **isyms = sec->indirect_syms;
2052
2053 num = bfd_mach_o_section_get_nbr_indirect (abfd, sec);
2054 if (isyms == NULL || num == 0)
2055 break;
2056 /* Record the starting index in the reserved1 field. */
2057 sec->reserved1 = n;
2058 for (j = 0; j < num; j++, n++)
2059 {
2060 if (isyms[j] == NULL)
2061 cmd->indirect_syms[n] = BFD_MACH_O_INDIRECT_SYM_LOCAL;
2062 else if (isyms[j]->symbol.section == bfd_abs_section_ptr
2063 && ! (isyms[j]->n_type & BFD_MACH_O_N_EXT))
2064 cmd->indirect_syms[n] = BFD_MACH_O_INDIRECT_SYM_LOCAL
2065 | BFD_MACH_O_INDIRECT_SYM_ABS;
2066 else
2067 cmd->indirect_syms[n] = isyms[j]->symbol.udata.i;
2068 }
2069 }
2070 break;
2071 default:
2072 break;
2073 }
2074 }
2075 }
2076
2077 return TRUE;
2078 }
2079
2080 /* Write a dysymtab command.
2081 TODO: Possibly coalesce writes of smaller objects. */
2082
2083 static bfd_boolean
2084 bfd_mach_o_write_dysymtab (bfd *abfd, bfd_mach_o_load_command *command)
2085 {
2086 bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab;
2087
2088 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB);
2089
2090 if (cmd->nmodtab != 0)
2091 {
2092 unsigned int i;
2093
2094 if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0)
2095 return FALSE;
2096
2097 for (i = 0; i < cmd->nmodtab; i++)
2098 {
2099 bfd_mach_o_dylib_module *module = &cmd->dylib_module[i];
2100 unsigned int iinit;
2101 unsigned int ninit;
2102
2103 iinit = module->iinit & 0xffff;
2104 iinit |= ((module->iterm & 0xffff) << 16);
2105
2106 ninit = module->ninit & 0xffff;
2107 ninit |= ((module->nterm & 0xffff) << 16);
2108
2109 if (bfd_mach_o_wide_p (abfd))
2110 {
2111 struct mach_o_dylib_module_64_external w;
2112
2113 bfd_h_put_32 (abfd, module->module_name_idx, &w.module_name);
2114 bfd_h_put_32 (abfd, module->iextdefsym, &w.iextdefsym);
2115 bfd_h_put_32 (abfd, module->nextdefsym, &w.nextdefsym);
2116 bfd_h_put_32 (abfd, module->irefsym, &w.irefsym);
2117 bfd_h_put_32 (abfd, module->nrefsym, &w.nrefsym);
2118 bfd_h_put_32 (abfd, module->ilocalsym, &w.ilocalsym);
2119 bfd_h_put_32 (abfd, module->nlocalsym, &w.nlocalsym);
2120 bfd_h_put_32 (abfd, module->iextrel, &w.iextrel);
2121 bfd_h_put_32 (abfd, module->nextrel, &w.nextrel);
2122 bfd_h_put_32 (abfd, iinit, &w.iinit_iterm);
2123 bfd_h_put_32 (abfd, ninit, &w.ninit_nterm);
2124 bfd_h_put_64 (abfd, module->objc_module_info_addr,
2125 &w.objc_module_info_addr);
2126 bfd_h_put_32 (abfd, module->objc_module_info_size,
2127 &w.objc_module_info_size);
2128
2129 if (bfd_bwrite ((void *) &w, sizeof (w), abfd) != sizeof (w))
2130 return FALSE;
2131 }
2132 else
2133 {
2134 struct mach_o_dylib_module_external n;
2135
2136 bfd_h_put_32 (abfd, module->module_name_idx, &n.module_name);
2137 bfd_h_put_32 (abfd, module->iextdefsym, &n.iextdefsym);
2138 bfd_h_put_32 (abfd, module->nextdefsym, &n.nextdefsym);
2139 bfd_h_put_32 (abfd, module->irefsym, &n.irefsym);
2140 bfd_h_put_32 (abfd, module->nrefsym, &n.nrefsym);
2141 bfd_h_put_32 (abfd, module->ilocalsym, &n.ilocalsym);
2142 bfd_h_put_32 (abfd, module->nlocalsym, &n.nlocalsym);
2143 bfd_h_put_32 (abfd, module->iextrel, &n.iextrel);
2144 bfd_h_put_32 (abfd, module->nextrel, &n.nextrel);
2145 bfd_h_put_32 (abfd, iinit, &n.iinit_iterm);
2146 bfd_h_put_32 (abfd, ninit, &n.ninit_nterm);
2147 bfd_h_put_32 (abfd, module->objc_module_info_addr,
2148 &n.objc_module_info_addr);
2149 bfd_h_put_32 (abfd, module->objc_module_info_size,
2150 &n.objc_module_info_size);
2151
2152 if (bfd_bwrite ((void *) &n, sizeof (n), abfd) != sizeof (n))
2153 return FALSE;
2154 }
2155 }
2156 }
2157
2158 if (cmd->ntoc != 0)
2159 {
2160 unsigned int i;
2161
2162 if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0)
2163 return FALSE;
2164
2165 for (i = 0; i < cmd->ntoc; i++)
2166 {
2167 struct mach_o_dylib_table_of_contents_external raw;
2168 bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i];
2169
2170 bfd_h_put_32 (abfd, toc->symbol_index, &raw.symbol_index);
2171 bfd_h_put_32 (abfd, toc->module_index, &raw.module_index);
2172
2173 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
2174 return FALSE;
2175 }
2176 }
2177
2178 if (cmd->nindirectsyms > 0)
2179 {
2180 unsigned int i;
2181
2182 if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0)
2183 return FALSE;
2184
2185 for (i = 0; i < cmd->nindirectsyms; ++i)
2186 {
2187 unsigned char raw[4];
2188
2189 bfd_h_put_32 (abfd, cmd->indirect_syms[i], &raw);
2190 if (bfd_bwrite (raw, sizeof (raw), abfd) != sizeof (raw))
2191 return FALSE;
2192 }
2193 }
2194
2195 if (cmd->nextrefsyms != 0)
2196 {
2197 unsigned int i;
2198
2199 if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0)
2200 return FALSE;
2201
2202 for (i = 0; i < cmd->nextrefsyms; i++)
2203 {
2204 unsigned long v;
2205 unsigned char raw[4];
2206 bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i];
2207
2208 /* Fields isym and flags are written as bit-fields, thus we need
2209 a specific processing for endianness. */
2210
2211 if (bfd_big_endian (abfd))
2212 {
2213 v = ((ref->isym & 0xffffff) << 8);
2214 v |= ref->flags & 0xff;
2215 }
2216 else
2217 {
2218 v = ref->isym & 0xffffff;
2219 v |= ((ref->flags & 0xff) << 24);
2220 }
2221
2222 bfd_h_put_32 (abfd, v, raw);
2223 if (bfd_bwrite (raw, sizeof (raw), abfd) != sizeof (raw))
2224 return FALSE;
2225 }
2226 }
2227
2228 /* The command. */
2229 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0)
2230 return FALSE;
2231 else
2232 {
2233 struct mach_o_dysymtab_command_external raw;
2234
2235 bfd_h_put_32 (abfd, cmd->ilocalsym, &raw.ilocalsym);
2236 bfd_h_put_32 (abfd, cmd->nlocalsym, &raw.nlocalsym);
2237 bfd_h_put_32 (abfd, cmd->iextdefsym, &raw.iextdefsym);
2238 bfd_h_put_32 (abfd, cmd->nextdefsym, &raw.nextdefsym);
2239 bfd_h_put_32 (abfd, cmd->iundefsym, &raw.iundefsym);
2240 bfd_h_put_32 (abfd, cmd->nundefsym, &raw.nundefsym);
2241 bfd_h_put_32 (abfd, cmd->tocoff, &raw.tocoff);
2242 bfd_h_put_32 (abfd, cmd->ntoc, &raw.ntoc);
2243 bfd_h_put_32 (abfd, cmd->modtaboff, &raw.modtaboff);
2244 bfd_h_put_32 (abfd, cmd->nmodtab, &raw.nmodtab);
2245 bfd_h_put_32 (abfd, cmd->extrefsymoff, &raw.extrefsymoff);
2246 bfd_h_put_32 (abfd, cmd->nextrefsyms, &raw.nextrefsyms);
2247 bfd_h_put_32 (abfd, cmd->indirectsymoff, &raw.indirectsymoff);
2248 bfd_h_put_32 (abfd, cmd->nindirectsyms, &raw.nindirectsyms);
2249 bfd_h_put_32 (abfd, cmd->extreloff, &raw.extreloff);
2250 bfd_h_put_32 (abfd, cmd->nextrel, &raw.nextrel);
2251 bfd_h_put_32 (abfd, cmd->locreloff, &raw.locreloff);
2252 bfd_h_put_32 (abfd, cmd->nlocrel, &raw.nlocrel);
2253
2254 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
2255 return FALSE;
2256 }
2257
2258 return TRUE;
2259 }
2260
2261 static unsigned
2262 bfd_mach_o_primary_symbol_sort_key (bfd_mach_o_asymbol *s)
2263 {
2264 unsigned mtyp = s->n_type & BFD_MACH_O_N_TYPE;
2265
2266 /* Just leave debug symbols where they are (pretend they are local, and
2267 then they will just be sorted on position). */
2268 if (s->n_type & BFD_MACH_O_N_STAB)
2269 return 0;
2270
2271 /* Local (we should never see an undefined local AFAICT). */
2272 if (! (s->n_type & (BFD_MACH_O_N_EXT | BFD_MACH_O_N_PEXT)))
2273 return 0;
2274
2275 /* Common symbols look like undefined externs. */
2276 if (mtyp == BFD_MACH_O_N_UNDF)
2277 return 2;
2278
2279 /* A defined non-local, non-debug symbol. */
2280 return 1;
2281 }
2282
2283 static int
2284 bfd_mach_o_cf_symbols (const void *a, const void *b)
2285 {
2286 bfd_mach_o_asymbol *sa = *(bfd_mach_o_asymbol **) a;
2287 bfd_mach_o_asymbol *sb = *(bfd_mach_o_asymbol **) b;
2288 unsigned int soa, sob;
2289
2290 soa = bfd_mach_o_primary_symbol_sort_key (sa);
2291 sob = bfd_mach_o_primary_symbol_sort_key (sb);
2292 if (soa < sob)
2293 return -1;
2294
2295 if (soa > sob)
2296 return 1;
2297
2298 /* If it's local or stab, just preserve the input order. */
2299 if (soa == 0)
2300 {
2301 if (sa->symbol.udata.i < sb->symbol.udata.i)
2302 return -1;
2303 if (sa->symbol.udata.i > sb->symbol.udata.i)
2304 return 1;
2305
2306 /* This is probably an error. */
2307 return 0;
2308 }
2309
2310 /* The second sort key is name. */
2311 return strcmp (sa->symbol.name, sb->symbol.name);
2312 }
2313
2314 /* Process the symbols.
2315
2316 This should be OK for single-module files - but it is not likely to work
2317 for multi-module shared libraries.
2318
2319 (a) If the application has not filled in the relevant mach-o fields, make
2320 an estimate.
2321
2322 (b) Order them, like this:
2323 ( i) local.
2324 (unsorted)
2325 ( ii) external defined
2326 (by name)
2327 (iii) external undefined/common
2328 (by name)
2329 ( iv) common
2330 (by name)
2331 */
2332
2333 static bfd_boolean
2334 bfd_mach_o_mangle_symbols (bfd *abfd)
2335 {
2336 unsigned long i;
2337 asymbol **symbols = bfd_get_outsymbols (abfd);
2338
2339 if (symbols == NULL || bfd_get_symcount (abfd) == 0)
2340 return TRUE;
2341
2342 for (i = 0; i < bfd_get_symcount (abfd); i++)
2343 {
2344 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2345
2346 /* We use this value, which is out-of-range as a symbol index, to signal
2347 that the mach-o-specific data are not filled in and need to be created
2348 from the bfd values. It is much preferable for the application to do
2349 this, since more meaningful diagnostics can be made that way. */
2350
2351 if (s->symbol.udata.i == SYM_MACHO_FIELDS_UNSET)
2352 {
2353 /* No symbol information has been set - therefore determine
2354 it from the bfd symbol flags/info. */
2355 if (s->symbol.section == bfd_abs_section_ptr)
2356 s->n_type = BFD_MACH_O_N_ABS;
2357 else if (s->symbol.section == bfd_und_section_ptr)
2358 {
2359 s->n_type = BFD_MACH_O_N_UNDF;
2360 if (s->symbol.flags & BSF_WEAK)
2361 s->n_desc |= BFD_MACH_O_N_WEAK_REF;
2362 /* mach-o automatically makes undefined symbols extern. */
2363 s->n_type |= BFD_MACH_O_N_EXT;
2364 s->symbol.flags |= BSF_GLOBAL;
2365 }
2366 else if (s->symbol.section == bfd_com_section_ptr)
2367 {
2368 s->n_type = BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT;
2369 s->symbol.flags |= BSF_GLOBAL;
2370 }
2371 else
2372 s->n_type = BFD_MACH_O_N_SECT;
2373
2374 if (s->symbol.flags & BSF_GLOBAL)
2375 s->n_type |= BFD_MACH_O_N_EXT;
2376 }
2377
2378 /* Put the section index in, where required. */
2379 if ((s->symbol.section != bfd_abs_section_ptr
2380 && s->symbol.section != bfd_und_section_ptr
2381 && s->symbol.section != bfd_com_section_ptr)
2382 || ((s->n_type & BFD_MACH_O_N_STAB) != 0
2383 && s->symbol.name == NULL))
2384 s->n_sect = s->symbol.section->output_section->target_index;
2385
2386 /* Number to preserve order for local and debug syms. */
2387 s->symbol.udata.i = i;
2388 }
2389
2390 /* Sort the symbols. */
2391 qsort ((void *) symbols, (size_t) bfd_get_symcount (abfd),
2392 sizeof (asymbol *), bfd_mach_o_cf_symbols);
2393
2394 for (i = 0; i < bfd_get_symcount (abfd); ++i)
2395 {
2396 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2397 s->symbol.udata.i = i; /* renumber. */
2398 }
2399
2400 return TRUE;
2401 }
2402
2403 /* We build a flat table of sections, which can be re-ordered if necessary.
2404 Fill in the section number and other mach-o-specific data. */
2405
2406 static bfd_boolean
2407 bfd_mach_o_mangle_sections (bfd *abfd, bfd_mach_o_data_struct *mdata)
2408 {
2409 asection *sec;
2410 unsigned target_index;
2411 unsigned nsect;
2412
2413 nsect = bfd_count_sections (abfd);
2414
2415 /* Don't do it if it's already set - assume the application knows what it's
2416 doing. */
2417 if (mdata->nsects == nsect
2418 && (mdata->nsects == 0 || mdata->sections != NULL))
2419 return TRUE;
2420
2421 /* We need to check that this can be done... */
2422 if (nsect > 255)
2423 {
2424 _bfd_error_handler (_("mach-o: there are too many sections (%u)"
2425 " maximum is 255,\n"), nsect);
2426 return FALSE;
2427 }
2428
2429 mdata->nsects = nsect;
2430 mdata->sections = bfd_alloc2 (abfd,
2431 mdata->nsects, sizeof (bfd_mach_o_section *));
2432 if (mdata->sections == NULL)
2433 return FALSE;
2434
2435 /* Create Mach-O sections.
2436 Section type, attribute and align should have been set when the
2437 section was created - either read in or specified. */
2438 target_index = 0;
2439 for (sec = abfd->sections; sec; sec = sec->next)
2440 {
2441 unsigned bfd_align = bfd_get_section_alignment (abfd, sec);
2442 bfd_mach_o_section *msect = bfd_mach_o_get_mach_o_section (sec);
2443
2444 mdata->sections[target_index] = msect;
2445
2446 msect->addr = bfd_get_section_vma (abfd, sec);
2447 msect->size = bfd_get_section_size (sec);
2448
2449 /* Use the largest alignment set, in case it was bumped after the
2450 section was created. */
2451 msect->align = msect->align > bfd_align ? msect->align : bfd_align;
2452
2453 msect->offset = 0;
2454 sec->target_index = ++target_index;
2455 }
2456
2457 return TRUE;
2458 }
2459
2460 bfd_boolean
2461 bfd_mach_o_write_contents (bfd *abfd)
2462 {
2463 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2464 bfd_mach_o_load_command *cmd;
2465 bfd_mach_o_symtab_command *symtab = NULL;
2466 bfd_mach_o_dysymtab_command *dysymtab = NULL;
2467 bfd_mach_o_segment_command *linkedit = NULL;
2468
2469 /* Make the commands, if not already present. */
2470 if (!abfd->output_has_begun && !bfd_mach_o_build_commands (abfd))
2471 return FALSE;
2472 abfd->output_has_begun = TRUE;
2473
2474 /* Write the header. */
2475 if (!bfd_mach_o_write_header (abfd, &mdata->header))
2476 return FALSE;
2477
2478 /* First pass: allocate the linkedit segment. */
2479 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
2480 switch (cmd->type)
2481 {
2482 case BFD_MACH_O_LC_SEGMENT_64:
2483 case BFD_MACH_O_LC_SEGMENT:
2484 if (strcmp (cmd->command.segment.segname, "__LINKEDIT") == 0)
2485 linkedit = &cmd->command.segment;
2486 break;
2487 case BFD_MACH_O_LC_SYMTAB:
2488 symtab = &cmd->command.symtab;
2489 break;
2490 case BFD_MACH_O_LC_DYSYMTAB:
2491 dysymtab = &cmd->command.dysymtab;
2492 break;
2493 case BFD_MACH_O_LC_DYLD_INFO:
2494 {
2495 bfd_mach_o_dyld_info_command *di = &cmd->command.dyld_info;
2496
2497 if (di->rebase_size != 0)
2498 {
2499 di->rebase_off = mdata->filelen;
2500 mdata->filelen += di->rebase_size;
2501 }
2502 if (di->bind_size != 0)
2503 {
2504 di->bind_off = mdata->filelen;
2505 mdata->filelen += di->bind_size;
2506 }
2507 if (di->weak_bind_size != 0)
2508 {
2509 di->weak_bind_off = mdata->filelen;
2510 mdata->filelen += di->weak_bind_size;
2511 }
2512 if (di->lazy_bind_size != 0)
2513 {
2514 di->lazy_bind_off = mdata->filelen;
2515 mdata->filelen += di->lazy_bind_size;
2516 }
2517 if (di->export_size != 0)
2518 {
2519 di->export_off = mdata->filelen;
2520 mdata->filelen += di->export_size;
2521 }
2522 }
2523 break;
2524 case BFD_MACH_O_LC_LOAD_DYLIB:
2525 case BFD_MACH_O_LC_LOAD_DYLINKER:
2526 case BFD_MACH_O_LC_MAIN:
2527 /* Nothing to do. */
2528 break;
2529 default:
2530 _bfd_error_handler
2531 (_("unable to allocate data for load command 0x%lx"),
2532 (unsigned long) cmd->type);
2533 break;
2534 }
2535
2536 /* Specially handle symtab and dysymtab. */
2537
2538 /* Pre-allocate the symbol table (but not the string table). The reason
2539 is that the dysymtab is after the symbol table but before the string
2540 table (required by the native strip tool). */
2541 if (symtab != NULL)
2542 {
2543 unsigned int symlen;
2544 unsigned int wide = bfd_mach_o_wide_p (abfd);
2545
2546 symlen = wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE;
2547
2548 /* Align for symbols. */
2549 mdata->filelen = FILE_ALIGN (mdata->filelen, wide ? 3 : 2);
2550 symtab->symoff = mdata->filelen;
2551
2552 symtab->nsyms = bfd_get_symcount (abfd);
2553 mdata->filelen += symtab->nsyms * symlen;
2554 }
2555
2556 /* Build the dysymtab. */
2557 if (dysymtab != NULL)
2558 if (!bfd_mach_o_build_dysymtab (abfd, dysymtab))
2559 return FALSE;
2560
2561 /* Write symtab and strtab. */
2562 if (symtab != NULL)
2563 if (!bfd_mach_o_write_symtab_content (abfd, symtab))
2564 return FALSE;
2565
2566 /* Adjust linkedit size. */
2567 if (linkedit != NULL)
2568 {
2569 /* bfd_vma pagemask = bfd_mach_o_get_backend_data (abfd)->page_size - 1; */
2570
2571 linkedit->vmsize = mdata->filelen - linkedit->fileoff;
2572 /* linkedit->vmsize = (linkedit->vmsize + pagemask) & ~pagemask; */
2573 linkedit->filesize = mdata->filelen - linkedit->fileoff;
2574
2575 linkedit->initprot = BFD_MACH_O_PROT_READ;
2576 linkedit->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
2577 | BFD_MACH_O_PROT_EXECUTE;
2578 }
2579
2580 /* Second pass: write commands. */
2581 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
2582 {
2583 struct mach_o_load_command_external raw;
2584 unsigned long typeflag;
2585
2586 typeflag = cmd->type | (cmd->type_required ? BFD_MACH_O_LC_REQ_DYLD : 0);
2587
2588 bfd_h_put_32 (abfd, typeflag, raw.cmd);
2589 bfd_h_put_32 (abfd, cmd->len, raw.cmdsize);
2590
2591 if (bfd_seek (abfd, cmd->offset, SEEK_SET) != 0
2592 || bfd_bwrite (&raw, BFD_MACH_O_LC_SIZE, abfd) != 8)
2593 return FALSE;
2594
2595 switch (cmd->type)
2596 {
2597 case BFD_MACH_O_LC_SEGMENT:
2598 if (!bfd_mach_o_write_segment_32 (abfd, cmd))
2599 return FALSE;
2600 break;
2601 case BFD_MACH_O_LC_SEGMENT_64:
2602 if (!bfd_mach_o_write_segment_64 (abfd, cmd))
2603 return FALSE;
2604 break;
2605 case BFD_MACH_O_LC_SYMTAB:
2606 if (!bfd_mach_o_write_symtab (abfd, cmd))
2607 return FALSE;
2608 break;
2609 case BFD_MACH_O_LC_DYSYMTAB:
2610 if (!bfd_mach_o_write_dysymtab (abfd, cmd))
2611 return FALSE;
2612 break;
2613 case BFD_MACH_O_LC_THREAD:
2614 case BFD_MACH_O_LC_UNIXTHREAD:
2615 if (!bfd_mach_o_write_thread (abfd, cmd))
2616 return FALSE;
2617 break;
2618 case BFD_MACH_O_LC_LOAD_DYLIB:
2619 if (!bfd_mach_o_write_dylib (abfd, cmd))
2620 return FALSE;
2621 break;
2622 case BFD_MACH_O_LC_LOAD_DYLINKER:
2623 if (!bfd_mach_o_write_dylinker (abfd, cmd))
2624 return FALSE;
2625 break;
2626 case BFD_MACH_O_LC_MAIN:
2627 if (!bfd_mach_o_write_main (abfd, cmd))
2628 return FALSE;
2629 break;
2630 case BFD_MACH_O_LC_DYLD_INFO:
2631 if (!bfd_mach_o_write_dyld_info (abfd, cmd))
2632 return FALSE;
2633 break;
2634 default:
2635 _bfd_error_handler
2636 (_("unable to write unknown load command 0x%lx"),
2637 (unsigned long) cmd->type);
2638 return FALSE;
2639 }
2640 }
2641
2642 return TRUE;
2643 }
2644
2645 static void
2646 bfd_mach_o_append_section_to_segment (bfd_mach_o_segment_command *seg,
2647 bfd_mach_o_section *s)
2648 {
2649 if (seg->sect_head == NULL)
2650 seg->sect_head = s;
2651 else
2652 seg->sect_tail->next = s;
2653 seg->sect_tail = s;
2654 }
2655
2656 /* Create section Mach-O flags from BFD flags. */
2657
2658 static void
2659 bfd_mach_o_set_section_flags_from_bfd (bfd *abfd ATTRIBUTE_UNUSED,
2660 asection *sec)
2661 {
2662 flagword bfd_flags;
2663 bfd_mach_o_section *s = bfd_mach_o_get_mach_o_section (sec);
2664
2665 /* Create default flags. */
2666 bfd_flags = bfd_get_section_flags (abfd, sec);
2667 if ((bfd_flags & SEC_CODE) == SEC_CODE)
2668 s->flags = BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS
2669 | BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS
2670 | BFD_MACH_O_S_REGULAR;
2671 else if ((bfd_flags & (SEC_ALLOC | SEC_LOAD)) == SEC_ALLOC)
2672 s->flags = BFD_MACH_O_S_ZEROFILL;
2673 else if (bfd_flags & SEC_DEBUGGING)
2674 s->flags = BFD_MACH_O_S_REGULAR | BFD_MACH_O_S_ATTR_DEBUG;
2675 else
2676 s->flags = BFD_MACH_O_S_REGULAR;
2677 }
2678
2679 static bfd_boolean
2680 bfd_mach_o_build_obj_seg_command (bfd *abfd, bfd_mach_o_segment_command *seg)
2681 {
2682 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2683 unsigned int i, j;
2684
2685 seg->vmaddr = 0;
2686 seg->fileoff = mdata->filelen;
2687 seg->initprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
2688 | BFD_MACH_O_PROT_EXECUTE;
2689 seg->maxprot = seg->initprot;
2690
2691 /* Append sections to the segment.
2692
2693 This is a little tedious, we have to honor the need to account zerofill
2694 sections after all the rest. This forces us to do the calculation of
2695 total vmsize in three passes so that any alignment increments are
2696 properly accounted. */
2697 for (i = 0; i < mdata->nsects; ++i)
2698 {
2699 bfd_mach_o_section *s = mdata->sections[i];
2700 asection *sec = s->bfdsection;
2701
2702 /* Although we account for zerofill section sizes in vm order, they are
2703 placed in the file in source sequence. */
2704 bfd_mach_o_append_section_to_segment (seg, s);
2705 s->offset = 0;
2706
2707 /* Zerofill sections have zero file size & offset, the only content
2708 written to the file is the symbols. */
2709 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) == BFD_MACH_O_S_ZEROFILL
2710 || ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2711 == BFD_MACH_O_S_GB_ZEROFILL))
2712 continue;
2713
2714 /* The Darwin system tools (in MH_OBJECT files, at least) always account
2715 sections, even those with zero size. */
2716 if (s->size > 0)
2717 {
2718 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2719 seg->vmsize += s->size;
2720
2721 /* MH_OBJECT files have unaligned content. */
2722 if (1)
2723 {
2724 seg->filesize = FILE_ALIGN (seg->filesize, s->align);
2725 mdata->filelen = FILE_ALIGN (mdata->filelen, s->align);
2726 }
2727 seg->filesize += s->size;
2728
2729 /* The system tools write even zero-sized sections with an offset
2730 field set to the current file position. */
2731 s->offset = mdata->filelen;
2732 }
2733
2734 sec->filepos = s->offset;
2735 mdata->filelen += s->size;
2736 }
2737
2738 /* Now pass through again, for zerofill, only now we just update the
2739 vmsize, and then for zerofill_GB. */
2740 for (j = 0; j < 2; j++)
2741 {
2742 unsigned int stype;
2743
2744 if (j == 0)
2745 stype = BFD_MACH_O_S_ZEROFILL;
2746 else
2747 stype = BFD_MACH_O_S_GB_ZEROFILL;
2748
2749 for (i = 0; i < mdata->nsects; ++i)
2750 {
2751 bfd_mach_o_section *s = mdata->sections[i];
2752
2753 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != stype)
2754 continue;
2755
2756 if (s->size > 0)
2757 {
2758 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2759 seg->vmsize += s->size;
2760 }
2761 }
2762 }
2763
2764 /* Allocate space for the relocations. */
2765 mdata->filelen = FILE_ALIGN (mdata->filelen, 2);
2766
2767 for (i = 0; i < mdata->nsects; ++i)
2768 {
2769 bfd_mach_o_section *ms = mdata->sections[i];
2770 asection *sec = ms->bfdsection;
2771
2772 ms->nreloc = sec->reloc_count;
2773 if (ms->nreloc == 0)
2774 {
2775 /* Clear nreloc and reloff if there is no relocs. */
2776 ms->reloff = 0;
2777 continue;
2778 }
2779 sec->rel_filepos = mdata->filelen;
2780 ms->reloff = sec->rel_filepos;
2781 mdata->filelen += sec->reloc_count * BFD_MACH_O_RELENT_SIZE;
2782 }
2783
2784 return TRUE;
2785 }
2786
2787 static bfd_boolean
2788 bfd_mach_o_build_exec_seg_command (bfd *abfd, bfd_mach_o_segment_command *seg)
2789 {
2790 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2791 unsigned int i;
2792 bfd_vma pagemask = bfd_mach_o_get_backend_data (abfd)->page_size - 1;
2793 bfd_vma vma;
2794 bfd_mach_o_section *s;
2795
2796 seg->vmsize = 0;
2797
2798 seg->fileoff = mdata->filelen;
2799 seg->maxprot = 0;
2800 seg->initprot = 0;
2801 seg->flags = 0;
2802
2803 /* Append sections to the segment. We assume they are properly ordered
2804 by vma (but we check that). */
2805 vma = 0;
2806 for (i = 0; i < mdata->nsects; ++i)
2807 {
2808 s = mdata->sections[i];
2809
2810 /* Consider only sections for this segment. */
2811 if (strcmp (seg->segname, s->segname) != 0)
2812 continue;
2813
2814 bfd_mach_o_append_section_to_segment (seg, s);
2815
2816 if (s->addr < vma)
2817 {
2818 _bfd_error_handler
2819 (_("section address (%lx) below start of segment (%lx)"),
2820 (unsigned long) s->addr, (unsigned long) vma);
2821 return FALSE;
2822 }
2823
2824 vma = s->addr + s->size;
2825 }
2826
2827 /* Set segment file offset: make it page aligned. */
2828 vma = seg->sect_head->addr;
2829 seg->vmaddr = vma & ~pagemask;
2830 if ((mdata->filelen & pagemask) > (vma & pagemask))
2831 mdata->filelen += pagemask + 1;
2832 seg->fileoff = mdata->filelen & ~pagemask;
2833 mdata->filelen = seg->fileoff + (vma & pagemask);
2834
2835 /* Set section file offset. */
2836 for (s = seg->sect_head; s != NULL; s = s->next)
2837 {
2838 asection *sec = s->bfdsection;
2839 flagword flags = bfd_get_section_flags (abfd, sec);
2840
2841 /* Adjust segment size. */
2842 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2843 seg->vmsize += s->size;
2844
2845 /* File offset and length. */
2846 seg->filesize = FILE_ALIGN (seg->filesize, s->align);
2847
2848 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != BFD_MACH_O_S_ZEROFILL
2849 && ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2850 != BFD_MACH_O_S_GB_ZEROFILL))
2851 {
2852 mdata->filelen = FILE_ALIGN (mdata->filelen, s->align);
2853
2854 s->offset = mdata->filelen;
2855 s->bfdsection->filepos = s->offset;
2856
2857 seg->filesize += s->size;
2858 mdata->filelen += s->size;
2859 }
2860 else
2861 {
2862 s->offset = 0;
2863 s->bfdsection->filepos = 0;
2864 }
2865
2866 /* Set protection. */
2867 if (flags & SEC_LOAD)
2868 {
2869 if (flags & SEC_CODE)
2870 seg->initprot |= BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_EXECUTE;
2871 if ((flags & (SEC_DATA | SEC_READONLY)) == SEC_DATA)
2872 seg->initprot |= BFD_MACH_O_PROT_WRITE | BFD_MACH_O_PROT_READ;
2873 }
2874
2875 /* Relocs shouldn't appear in non-object files. */
2876 if (s->bfdsection->reloc_count != 0)
2877 return FALSE;
2878 }
2879
2880 /* Set maxprot. */
2881 if (seg->initprot != 0)
2882 seg->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
2883 | BFD_MACH_O_PROT_EXECUTE;
2884 else
2885 seg->maxprot = 0;
2886
2887 /* Round segment size (and file size). */
2888 seg->vmsize = (seg->vmsize + pagemask) & ~pagemask;
2889 seg->filesize = (seg->filesize + pagemask) & ~pagemask;
2890 mdata->filelen = (mdata->filelen + pagemask) & ~pagemask;
2891
2892 return TRUE;
2893 }
2894
2895 /* Layout the commands: set commands size and offset, set ncmds and sizeofcmds
2896 fields in header. */
2897
2898 static bfd_boolean
2899 bfd_mach_o_layout_commands (bfd_mach_o_data_struct *mdata)
2900 {
2901 unsigned wide = mach_o_wide_p (&mdata->header);
2902 unsigned int hdrlen;
2903 ufile_ptr offset;
2904 bfd_mach_o_load_command *cmd;
2905 unsigned int align;
2906 bfd_boolean ret = TRUE;
2907
2908 hdrlen = wide ? BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
2909 align = wide ? 8 - 1 : 4 - 1;
2910 offset = hdrlen;
2911 mdata->header.ncmds = 0;
2912
2913 for (cmd = mdata->first_command; cmd; cmd = cmd->next)
2914 {
2915 mdata->header.ncmds++;
2916 cmd->offset = offset;
2917
2918 switch (cmd->type)
2919 {
2920 case BFD_MACH_O_LC_SEGMENT_64:
2921 cmd->len = BFD_MACH_O_LC_SEGMENT_64_SIZE
2922 + BFD_MACH_O_SECTION_64_SIZE * cmd->command.segment.nsects;
2923 break;
2924 case BFD_MACH_O_LC_SEGMENT:
2925 cmd->len = BFD_MACH_O_LC_SEGMENT_SIZE
2926 + BFD_MACH_O_SECTION_SIZE * cmd->command.segment.nsects;
2927 break;
2928 case BFD_MACH_O_LC_SYMTAB:
2929 cmd->len = sizeof (struct mach_o_symtab_command_external)
2930 + BFD_MACH_O_LC_SIZE;
2931 break;
2932 case BFD_MACH_O_LC_DYSYMTAB:
2933 cmd->len = sizeof (struct mach_o_dysymtab_command_external)
2934 + BFD_MACH_O_LC_SIZE;
2935 break;
2936 case BFD_MACH_O_LC_LOAD_DYLIB:
2937 cmd->len = sizeof (struct mach_o_dylib_command_external)
2938 + BFD_MACH_O_LC_SIZE;
2939 cmd->command.dylib.name_offset = cmd->len;
2940 cmd->len += strlen (cmd->command.dylib.name_str);
2941 cmd->len = (cmd->len + align) & ~align;
2942 break;
2943 case BFD_MACH_O_LC_LOAD_DYLINKER:
2944 cmd->len = sizeof (struct mach_o_str_command_external)
2945 + BFD_MACH_O_LC_SIZE;
2946 cmd->command.dylinker.name_offset = cmd->len;
2947 cmd->len += strlen (cmd->command.dylinker.name_str);
2948 cmd->len = (cmd->len + align) & ~align;
2949 break;
2950 case BFD_MACH_O_LC_MAIN:
2951 cmd->len = sizeof (struct mach_o_entry_point_command_external)
2952 + BFD_MACH_O_LC_SIZE;
2953 break;
2954 case BFD_MACH_O_LC_DYLD_INFO:
2955 cmd->len = sizeof (struct mach_o_dyld_info_command_external)
2956 + BFD_MACH_O_LC_SIZE;
2957 break;
2958 default:
2959 _bfd_error_handler
2960 (_("unable to layout unknown load command 0x%lx"),
2961 (unsigned long) cmd->type);
2962 ret = FALSE;
2963 break;
2964 }
2965
2966 BFD_ASSERT (cmd->len % (align + 1) == 0);
2967 offset += cmd->len;
2968 }
2969 mdata->header.sizeofcmds = offset - hdrlen;
2970 mdata->filelen = offset;
2971
2972 return ret;
2973 }
2974
2975 /* Subroutine of bfd_mach_o_build_commands: set type, name and nsects of a
2976 segment. */
2977
2978 static void
2979 bfd_mach_o_init_segment (bfd_mach_o_data_struct *mdata,
2980 bfd_mach_o_load_command *cmd,
2981 const char *segname, unsigned int nbr_sect)
2982 {
2983 bfd_mach_o_segment_command *seg = &cmd->command.segment;
2984 unsigned wide = mach_o_wide_p (&mdata->header);
2985
2986 /* Init segment command. */
2987 cmd->type = wide ? BFD_MACH_O_LC_SEGMENT_64 : BFD_MACH_O_LC_SEGMENT;
2988 cmd->type_required = FALSE;
2989
2990 strcpy (seg->segname, segname);
2991 seg->nsects = nbr_sect;
2992
2993 seg->vmaddr = 0;
2994 seg->vmsize = 0;
2995
2996 seg->fileoff = 0;
2997 seg->filesize = 0;
2998 seg->maxprot = 0;
2999 seg->initprot = 0;
3000 seg->flags = 0;
3001 seg->sect_head = NULL;
3002 seg->sect_tail = NULL;
3003 }
3004
3005 /* Build Mach-O load commands (currently assuming an MH_OBJECT file).
3006 TODO: Other file formats, rebuilding symtab/dysymtab commands for strip
3007 and copy functionality. */
3008
3009 bfd_boolean
3010 bfd_mach_o_build_commands (bfd *abfd)
3011 {
3012 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3013 unsigned wide = mach_o_wide_p (&mdata->header);
3014 unsigned int nbr_segcmd = 0;
3015 bfd_mach_o_load_command *commands;
3016 unsigned int nbr_commands;
3017 int symtab_idx = -1;
3018 int dysymtab_idx = -1;
3019 int main_idx = -1;
3020 unsigned int i;
3021
3022 /* Return now if already built. */
3023 if (mdata->header.ncmds != 0)
3024 return TRUE;
3025
3026 /* Fill in the file type, if not already set. */
3027 if (mdata->header.filetype == 0)
3028 {
3029 if (abfd->flags & EXEC_P)
3030 mdata->header.filetype = BFD_MACH_O_MH_EXECUTE;
3031 else if (abfd->flags & DYNAMIC)
3032 mdata->header.filetype = BFD_MACH_O_MH_DYLIB;
3033 else
3034 mdata->header.filetype = BFD_MACH_O_MH_OBJECT;
3035 }
3036
3037 /* If hasn't already been done, flatten sections list, and sort
3038 if/when required. Must be done before the symbol table is adjusted,
3039 since that depends on properly numbered sections. */
3040 if (mdata->nsects == 0 || mdata->sections == NULL)
3041 if (! bfd_mach_o_mangle_sections (abfd, mdata))
3042 return FALSE;
3043
3044 /* Order the symbol table, fill-in/check mach-o specific fields and
3045 partition out any indirect symbols. */
3046 if (!bfd_mach_o_mangle_symbols (abfd))
3047 return FALSE;
3048
3049 /* Segment commands. */
3050 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT)
3051 {
3052 /* Only one segment for all the sections. But the segment is
3053 optional if there is no sections. */
3054 nbr_segcmd = (mdata->nsects > 0) ? 1 : 0;
3055 }
3056 else
3057 {
3058 bfd_mach_o_section *prev_sect = NULL;
3059
3060 /* One pagezero segment and one linkedit segment. */
3061 nbr_segcmd = 2;
3062
3063 /* Create one segment for associated segment name in sections.
3064 Assume that sections with the same segment name are consecutive. */
3065 for (i = 0; i < mdata->nsects; i++)
3066 {
3067 bfd_mach_o_section *this_sect = mdata->sections[i];
3068
3069 if (prev_sect == NULL
3070 || strcmp (prev_sect->segname, this_sect->segname) != 0)
3071 {
3072 nbr_segcmd++;
3073 prev_sect = this_sect;
3074 }
3075 }
3076 }
3077
3078 nbr_commands = nbr_segcmd;
3079
3080 /* One command for the symbol table (only if there are symbols. */
3081 if (bfd_get_symcount (abfd) > 0)
3082 symtab_idx = nbr_commands++;
3083
3084 /* FIXME:
3085 This is a rather crude test for whether we should build a dysymtab. */
3086 if (bfd_mach_o_should_emit_dysymtab ()
3087 && bfd_get_symcount (abfd))
3088 {
3089 /* If there should be a case where a dysymtab could be emitted without
3090 a symtab (seems improbable), this would need amending. */
3091 dysymtab_idx = nbr_commands++;
3092 }
3093
3094 /* Add an entry point command. */
3095 if (mdata->header.filetype == BFD_MACH_O_MH_EXECUTE
3096 && bfd_get_start_address (abfd) != 0)
3097 main_idx = nbr_commands++;
3098
3099 /* Well, we must have a header, at least. */
3100 mdata->filelen = wide ? BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
3101
3102 /* A bit unusual, but no content is valid;
3103 as -n empty.s -o empty.o */
3104 if (nbr_commands == 0)
3105 {
3106 /* Layout commands (well none...) and set headers command fields. */
3107 return bfd_mach_o_layout_commands (mdata);
3108 }
3109
3110 /* Create commands for segments (and symtabs), prepend them. */
3111 commands = bfd_zalloc (abfd, nbr_commands * sizeof (bfd_mach_o_load_command));
3112 if (commands == NULL)
3113 return FALSE;
3114 for (i = 0; i < nbr_commands - 1; i++)
3115 commands[i].next = &commands[i + 1];
3116 commands[nbr_commands - 1].next = mdata->first_command;
3117 if (mdata->first_command == NULL)
3118 mdata->last_command = &commands[nbr_commands - 1];
3119 mdata->first_command = &commands[0];
3120
3121 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT && nbr_segcmd != 0)
3122 {
3123 /* For object file, there is only one segment. */
3124 bfd_mach_o_init_segment (mdata, &commands[0], "", mdata->nsects);
3125 }
3126 else if (nbr_segcmd != 0)
3127 {
3128 bfd_mach_o_load_command *cmd;
3129
3130 BFD_ASSERT (nbr_segcmd >= 2);
3131
3132 /* The pagezero. */
3133 cmd = &commands[0];
3134 bfd_mach_o_init_segment (mdata, cmd, "__PAGEZERO", 0);
3135
3136 /* Segments from sections. */
3137 cmd++;
3138 for (i = 0; i < mdata->nsects;)
3139 {
3140 const char *segname = mdata->sections[i]->segname;
3141 unsigned int nbr_sect = 1;
3142
3143 /* Count number of sections for this segment. */
3144 for (i++; i < mdata->nsects; i++)
3145 if (strcmp (mdata->sections[i]->segname, segname) == 0)
3146 nbr_sect++;
3147 else
3148 break;
3149
3150 bfd_mach_o_init_segment (mdata, cmd, segname, nbr_sect);
3151 cmd++;
3152 }
3153
3154 /* The linkedit. */
3155 bfd_mach_o_init_segment (mdata, cmd, "__LINKEDIT", 0);
3156 }
3157
3158 if (symtab_idx >= 0)
3159 {
3160 /* Init symtab command. */
3161 bfd_mach_o_load_command *cmd = &commands[symtab_idx];
3162
3163 cmd->type = BFD_MACH_O_LC_SYMTAB;
3164 cmd->type_required = FALSE;
3165 }
3166
3167 /* If required, setup symtab command, see comment above about the quality
3168 of this test. */
3169 if (dysymtab_idx >= 0)
3170 {
3171 bfd_mach_o_load_command *cmd = &commands[dysymtab_idx];
3172
3173 cmd->type = BFD_MACH_O_LC_DYSYMTAB;
3174 cmd->type_required = FALSE;
3175 }
3176
3177 /* Create the main command. */
3178 if (main_idx >= 0)
3179 {
3180 bfd_mach_o_load_command *cmd = &commands[main_idx];
3181
3182 cmd->type = BFD_MACH_O_LC_MAIN;
3183 cmd->type_required = TRUE;
3184
3185 cmd->command.main.entryoff = 0;
3186 cmd->command.main.stacksize = 0;
3187 }
3188
3189 /* Layout commands. */
3190 if (! bfd_mach_o_layout_commands (mdata))
3191 return FALSE;
3192
3193 /* So, now we have sized the commands and the filelen set to that.
3194 Now we can build the segment command and set the section file offsets. */
3195 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT)
3196 {
3197 for (i = 0; i < nbr_segcmd; i++)
3198 if (!bfd_mach_o_build_obj_seg_command
3199 (abfd, &commands[i].command.segment))
3200 return FALSE;
3201 }
3202 else
3203 {
3204 bfd_vma maxvma = 0;
3205
3206 /* Skip pagezero and linkedit segments. */
3207 for (i = 1; i < nbr_segcmd - 1; i++)
3208 {
3209 bfd_mach_o_segment_command *seg = &commands[i].command.segment;
3210
3211 if (!bfd_mach_o_build_exec_seg_command (abfd, seg))
3212 return FALSE;
3213
3214 if (seg->vmaddr + seg->vmsize > maxvma)
3215 maxvma = seg->vmaddr + seg->vmsize;
3216 }
3217
3218 /* Set the size of __PAGEZERO. */
3219 commands[0].command.segment.vmsize =
3220 commands[1].command.segment.vmaddr;
3221
3222 /* Set the vma and fileoff of __LINKEDIT. */
3223 commands[nbr_segcmd - 1].command.segment.vmaddr = maxvma;
3224 commands[nbr_segcmd - 1].command.segment.fileoff = mdata->filelen;
3225
3226 /* Set entry point (once segments have been laid out). */
3227 if (main_idx >= 0)
3228 commands[main_idx].command.main.entryoff =
3229 bfd_get_start_address (abfd) - commands[1].command.segment.vmaddr;
3230 }
3231
3232 return TRUE;
3233 }
3234
3235 /* Set the contents of a section. */
3236
3237 bfd_boolean
3238 bfd_mach_o_set_section_contents (bfd *abfd,
3239 asection *section,
3240 const void * location,
3241 file_ptr offset,
3242 bfd_size_type count)
3243 {
3244 file_ptr pos;
3245
3246 /* Trying to write the first section contents will trigger the creation of
3247 the load commands if they are not already present. */
3248 if (!abfd->output_has_begun && !bfd_mach_o_build_commands (abfd))
3249 return FALSE;
3250
3251 if (count == 0)
3252 return TRUE;
3253
3254 pos = section->filepos + offset;
3255 if (bfd_seek (abfd, pos, SEEK_SET) != 0
3256 || bfd_bwrite (location, count, abfd) != count)
3257 return FALSE;
3258
3259 return TRUE;
3260 }
3261
3262 int
3263 bfd_mach_o_sizeof_headers (bfd *a ATTRIBUTE_UNUSED,
3264 struct bfd_link_info *info ATTRIBUTE_UNUSED)
3265 {
3266 return 0;
3267 }
3268
3269 /* Make an empty symbol. This is required only because
3270 bfd_make_section_anyway wants to create a symbol for the section. */
3271
3272 asymbol *
3273 bfd_mach_o_make_empty_symbol (bfd *abfd)
3274 {
3275 asymbol *new_symbol;
3276
3277 new_symbol = bfd_zalloc (abfd, sizeof (bfd_mach_o_asymbol));
3278 if (new_symbol == NULL)
3279 return new_symbol;
3280 new_symbol->the_bfd = abfd;
3281 new_symbol->udata.i = SYM_MACHO_FIELDS_UNSET;
3282 return new_symbol;
3283 }
3284
3285 static bfd_boolean
3286 bfd_mach_o_read_header (bfd *abfd, file_ptr hdr_off, bfd_mach_o_header *header)
3287 {
3288 struct mach_o_header_external raw;
3289 unsigned int size;
3290 bfd_vma (*get32) (const void *) = NULL;
3291
3292 /* Just read the magic number. */
3293 if (bfd_seek (abfd, hdr_off, SEEK_SET) != 0
3294 || bfd_bread (raw.magic, sizeof (raw.magic), abfd) != 4)
3295 return FALSE;
3296
3297 if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC)
3298 {
3299 header->byteorder = BFD_ENDIAN_BIG;
3300 header->magic = BFD_MACH_O_MH_MAGIC;
3301 header->version = 1;
3302 get32 = bfd_getb32;
3303 }
3304 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC)
3305 {
3306 header->byteorder = BFD_ENDIAN_LITTLE;
3307 header->magic = BFD_MACH_O_MH_MAGIC;
3308 header->version = 1;
3309 get32 = bfd_getl32;
3310 }
3311 else if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64)
3312 {
3313 header->byteorder = BFD_ENDIAN_BIG;
3314 header->magic = BFD_MACH_O_MH_MAGIC_64;
3315 header->version = 2;
3316 get32 = bfd_getb32;
3317 }
3318 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64)
3319 {
3320 header->byteorder = BFD_ENDIAN_LITTLE;
3321 header->magic = BFD_MACH_O_MH_MAGIC_64;
3322 header->version = 2;
3323 get32 = bfd_getl32;
3324 }
3325 else
3326 {
3327 header->byteorder = BFD_ENDIAN_UNKNOWN;
3328 return FALSE;
3329 }
3330
3331 /* Once the size of the header is known, read the full header. */
3332 size = mach_o_wide_p (header) ?
3333 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
3334
3335 if (bfd_seek (abfd, hdr_off, SEEK_SET) != 0
3336 || bfd_bread (&raw, size, abfd) != size)
3337 return FALSE;
3338
3339 header->cputype = (*get32) (raw.cputype);
3340 header->cpusubtype = (*get32) (raw.cpusubtype);
3341 header->filetype = (*get32) (raw.filetype);
3342 header->ncmds = (*get32) (raw.ncmds);
3343 header->sizeofcmds = (*get32) (raw.sizeofcmds);
3344 header->flags = (*get32) (raw.flags);
3345
3346 if (mach_o_wide_p (header))
3347 header->reserved = (*get32) (raw.reserved);
3348 else
3349 header->reserved = 0;
3350
3351 return TRUE;
3352 }
3353
3354 bfd_boolean
3355 bfd_mach_o_new_section_hook (bfd *abfd, asection *sec)
3356 {
3357 bfd_mach_o_section *s;
3358 unsigned bfdalign = bfd_get_section_alignment (abfd, sec);
3359
3360 s = bfd_mach_o_get_mach_o_section (sec);
3361 if (s == NULL)
3362 {
3363 flagword bfd_flags;
3364 static const mach_o_section_name_xlat * xlat;
3365
3366 s = (bfd_mach_o_section *) bfd_zalloc (abfd, sizeof (*s));
3367 if (s == NULL)
3368 return FALSE;
3369 sec->used_by_bfd = s;
3370 s->bfdsection = sec;
3371
3372 /* Create the Darwin seg/sect name pair from the bfd name.
3373 If this is a canonical name for which a specific paiting exists
3374 there will also be defined flags, type, attribute and alignment
3375 values. */
3376 xlat = bfd_mach_o_convert_section_name_to_mach_o (abfd, sec, s);
3377 if (xlat != NULL)
3378 {
3379 s->flags = xlat->macho_sectype | xlat->macho_secattr;
3380 s->align = xlat->sectalign > bfdalign ? xlat->sectalign
3381 : bfdalign;
3382 (void) bfd_set_section_alignment (abfd, sec, s->align);
3383 bfd_flags = bfd_get_section_flags (abfd, sec);
3384 if (bfd_flags == SEC_NO_FLAGS)
3385 bfd_set_section_flags (abfd, sec, xlat->bfd_flags);
3386 }
3387 else
3388 /* Create default flags. */
3389 bfd_mach_o_set_section_flags_from_bfd (abfd, sec);
3390 }
3391
3392 return _bfd_generic_new_section_hook (abfd, sec);
3393 }
3394
3395 static void
3396 bfd_mach_o_init_section_from_mach_o (bfd *abfd, asection *sec,
3397 unsigned long prot)
3398 {
3399 flagword flags;
3400 bfd_mach_o_section *section;
3401
3402 flags = bfd_get_section_flags (abfd, sec);
3403 section = bfd_mach_o_get_mach_o_section (sec);
3404
3405 /* TODO: see if we should use the xlat system for doing this by
3406 preference and fall back to this for unknown sections. */
3407
3408 if (flags == SEC_NO_FLAGS)
3409 {
3410 /* Try to guess flags. */
3411 if (section->flags & BFD_MACH_O_S_ATTR_DEBUG)
3412 flags = SEC_DEBUGGING;
3413 else
3414 {
3415 flags = SEC_ALLOC;
3416 if ((section->flags & BFD_MACH_O_SECTION_TYPE_MASK)
3417 != BFD_MACH_O_S_ZEROFILL)
3418 {
3419 flags |= SEC_LOAD;
3420 if (prot & BFD_MACH_O_PROT_EXECUTE)
3421 flags |= SEC_CODE;
3422 if (prot & BFD_MACH_O_PROT_WRITE)
3423 flags |= SEC_DATA;
3424 else if (prot & BFD_MACH_O_PROT_READ)
3425 flags |= SEC_READONLY;
3426 }
3427 }
3428 }
3429 else
3430 {
3431 if ((flags & SEC_DEBUGGING) == 0)
3432 flags |= SEC_ALLOC;
3433 }
3434
3435 if (section->offset != 0)
3436 flags |= SEC_HAS_CONTENTS;
3437 if (section->nreloc != 0)
3438 flags |= SEC_RELOC;
3439
3440 bfd_set_section_flags (abfd, sec, flags);
3441
3442 sec->vma = section->addr;
3443 sec->lma = section->addr;
3444 sec->size = section->size;
3445 sec->filepos = section->offset;
3446 sec->alignment_power = section->align;
3447 sec->segment_mark = 0;
3448 sec->reloc_count = section->nreloc;
3449 sec->rel_filepos = section->reloff;
3450 }
3451
3452 static asection *
3453 bfd_mach_o_make_bfd_section (bfd *abfd,
3454 const unsigned char *segname,
3455 const unsigned char *sectname)
3456 {
3457 const char *sname;
3458 flagword flags;
3459
3460 bfd_mach_o_convert_section_name_to_bfd
3461 (abfd, (const char *)segname, (const char *)sectname, &sname, &flags);
3462 if (sname == NULL)
3463 return NULL;
3464
3465 return bfd_make_section_anyway_with_flags (abfd, sname, flags);
3466 }
3467
3468 static asection *
3469 bfd_mach_o_read_section_32 (bfd *abfd, unsigned long prot)
3470 {
3471 struct mach_o_section_32_external raw;
3472 asection *sec;
3473 bfd_mach_o_section *section;
3474
3475 if (bfd_bread (&raw, BFD_MACH_O_SECTION_SIZE, abfd)
3476 != BFD_MACH_O_SECTION_SIZE)
3477 return NULL;
3478
3479 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname);
3480 if (sec == NULL)
3481 return NULL;
3482
3483 section = bfd_mach_o_get_mach_o_section (sec);
3484 memcpy (section->segname, raw.segname, sizeof (raw.segname));
3485 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0;
3486 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname));
3487 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0;
3488 section->addr = bfd_h_get_32 (abfd, raw.addr);
3489 section->size = bfd_h_get_32 (abfd, raw.size);
3490 section->offset = bfd_h_get_32 (abfd, raw.offset);
3491 section->align = bfd_h_get_32 (abfd, raw.align);
3492 /* PR 17512: file: 0017eb76. */
3493 if (section->align > 64)
3494 {
3495 _bfd_error_handler
3496 (_("bfd_mach_o_read_section_32: overlarge alignment value: 0x%x, "
3497 "using 32 instead"), section->align);
3498 section->align = 32;
3499 }
3500 section->reloff = bfd_h_get_32 (abfd, raw.reloff);
3501 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc);
3502 section->flags = bfd_h_get_32 (abfd, raw.flags);
3503 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1);
3504 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2);
3505 section->reserved3 = 0;
3506
3507 bfd_mach_o_init_section_from_mach_o (abfd, sec, prot);
3508
3509 return sec;
3510 }
3511
3512 static asection *
3513 bfd_mach_o_read_section_64 (bfd *abfd, unsigned long prot)
3514 {
3515 struct mach_o_section_64_external raw;
3516 asection *sec;
3517 bfd_mach_o_section *section;
3518
3519 if (bfd_bread (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd)
3520 != BFD_MACH_O_SECTION_64_SIZE)
3521 return NULL;
3522
3523 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname);
3524 if (sec == NULL)
3525 return NULL;
3526
3527 section = bfd_mach_o_get_mach_o_section (sec);
3528 memcpy (section->segname, raw.segname, sizeof (raw.segname));
3529 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0;
3530 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname));
3531 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0;
3532 section->addr = bfd_h_get_64 (abfd, raw.addr);
3533 section->size = bfd_h_get_64 (abfd, raw.size);
3534 section->offset = bfd_h_get_32 (abfd, raw.offset);
3535 section->align = bfd_h_get_32 (abfd, raw.align);
3536 if (section->align > 64)
3537 {
3538 _bfd_error_handler
3539 (_("bfd_mach_o_read_section_64: overlarge alignment value: 0x%x, "
3540 "using 32 instead"), section->align);
3541 section->align = 32;
3542 }
3543 section->reloff = bfd_h_get_32 (abfd, raw.reloff);
3544 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc);
3545 section->flags = bfd_h_get_32 (abfd, raw.flags);
3546 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1);
3547 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2);
3548 section->reserved3 = bfd_h_get_32 (abfd, raw.reserved3);
3549
3550 bfd_mach_o_init_section_from_mach_o (abfd, sec, prot);
3551
3552 return sec;
3553 }
3554
3555 static asection *
3556 bfd_mach_o_read_section (bfd *abfd, unsigned long prot, unsigned int wide)
3557 {
3558 if (wide)
3559 return bfd_mach_o_read_section_64 (abfd, prot);
3560 else
3561 return bfd_mach_o_read_section_32 (abfd, prot);
3562 }
3563
3564 static bfd_boolean
3565 bfd_mach_o_read_symtab_symbol (bfd *abfd,
3566 bfd_mach_o_symtab_command *sym,
3567 bfd_mach_o_asymbol *s,
3568 unsigned long i)
3569 {
3570 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3571 unsigned int wide = mach_o_wide_p (&mdata->header);
3572 unsigned int symwidth =
3573 wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE;
3574 unsigned int symoff = sym->symoff + (i * symwidth);
3575 struct mach_o_nlist_64_external raw;
3576 unsigned char type = -1;
3577 unsigned char section = -1;
3578 short desc = -1;
3579 symvalue value = -1;
3580 unsigned long stroff = -1;
3581 unsigned int symtype = -1;
3582
3583 BFD_ASSERT (sym->strtab != NULL);
3584
3585 if (bfd_seek (abfd, symoff, SEEK_SET) != 0
3586 || bfd_bread (&raw, symwidth, abfd) != symwidth)
3587 {
3588 _bfd_error_handler
3589 (_("bfd_mach_o_read_symtab_symbol: unable to read %d bytes at %lu"),
3590 symwidth, (unsigned long) symoff);
3591 return FALSE;
3592 }
3593
3594 stroff = bfd_h_get_32 (abfd, raw.n_strx);
3595 type = bfd_h_get_8 (abfd, raw.n_type);
3596 symtype = type & BFD_MACH_O_N_TYPE;
3597 section = bfd_h_get_8 (abfd, raw.n_sect);
3598 desc = bfd_h_get_16 (abfd, raw.n_desc);
3599 if (wide)
3600 value = bfd_h_get_64 (abfd, raw.n_value);
3601 else
3602 value = bfd_h_get_32 (abfd, raw.n_value);
3603
3604 if (stroff >= sym->strsize)
3605 {
3606 _bfd_error_handler
3607 (_("bfd_mach_o_read_symtab_symbol: name out of range (%lu >= %lu)"),
3608 (unsigned long) stroff,
3609 (unsigned long) sym->strsize);
3610 return FALSE;
3611 }
3612
3613 s->symbol.the_bfd = abfd;
3614 s->symbol.name = sym->strtab + stroff;
3615 s->symbol.value = value;
3616 s->symbol.flags = 0x0;
3617 s->symbol.udata.i = i;
3618 s->n_type = type;
3619 s->n_sect = section;
3620 s->n_desc = desc;
3621
3622 if (type & BFD_MACH_O_N_STAB)
3623 {
3624 s->symbol.flags |= BSF_DEBUGGING;
3625 s->symbol.section = bfd_und_section_ptr;
3626 switch (type)
3627 {
3628 case N_FUN:
3629 case N_STSYM:
3630 case N_LCSYM:
3631 case N_BNSYM:
3632 case N_SLINE:
3633 case N_ENSYM:
3634 case N_ECOMM:
3635 case N_ECOML:
3636 case N_GSYM:
3637 if ((section > 0) && (section <= mdata->nsects))
3638 {
3639 s->symbol.section = mdata->sections[section - 1]->bfdsection;
3640 s->symbol.value =
3641 s->symbol.value - mdata->sections[section - 1]->addr;
3642 }
3643 break;
3644 }
3645 }
3646 else
3647 {
3648 if (type & (BFD_MACH_O_N_PEXT | BFD_MACH_O_N_EXT))
3649 s->symbol.flags |= BSF_GLOBAL;
3650 else
3651 s->symbol.flags |= BSF_LOCAL;
3652
3653 switch (symtype)
3654 {
3655 case BFD_MACH_O_N_UNDF:
3656 if (type == (BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT)
3657 && s->symbol.value != 0)
3658 {
3659 /* A common symbol. */
3660 s->symbol.section = bfd_com_section_ptr;
3661 s->symbol.flags = BSF_NO_FLAGS;
3662 }
3663 else
3664 {
3665 s->symbol.section = bfd_und_section_ptr;
3666 if (s->n_desc & BFD_MACH_O_N_WEAK_REF)
3667 s->symbol.flags |= BSF_WEAK;
3668 }
3669 break;
3670 case BFD_MACH_O_N_PBUD:
3671 s->symbol.section = bfd_und_section_ptr;
3672 break;
3673 case BFD_MACH_O_N_ABS:
3674 s->symbol.section = bfd_abs_section_ptr;
3675 break;
3676 case BFD_MACH_O_N_SECT:
3677 if ((section > 0) && (section <= mdata->nsects))
3678 {
3679 s->symbol.section = mdata->sections[section - 1]->bfdsection;
3680 s->symbol.value =
3681 s->symbol.value - mdata->sections[section - 1]->addr;
3682 }
3683 else
3684 {
3685 /* Mach-O uses 0 to mean "no section"; not an error. */
3686 if (section != 0)
3687 {
3688 _bfd_error_handler
3689 (_("bfd_mach_o_read_symtab_symbol: "
3690 "symbol \"%s\" specified invalid section %d (max %lu): "
3691 "setting to undefined"),
3692 s->symbol.name, section, mdata->nsects);
3693 }
3694 s->symbol.section = bfd_und_section_ptr;
3695 }
3696 break;
3697 case BFD_MACH_O_N_INDR:
3698 /* FIXME: we don't follow the BFD convention as this indirect symbol
3699 won't be followed by the referenced one. This looks harmless
3700 unless we start using the linker. */
3701 s->symbol.flags |= BSF_INDIRECT;
3702 s->symbol.section = bfd_ind_section_ptr;
3703 s->symbol.value = 0;
3704 break;
3705 default:
3706 _bfd_error_handler
3707 (_("bfd_mach_o_read_symtab_symbol: "
3708 "symbol \"%s\" specified invalid type field 0x%x: "
3709 "setting to undefined"), s->symbol.name, symtype);
3710 s->symbol.section = bfd_und_section_ptr;
3711 break;
3712 }
3713 }
3714
3715 return TRUE;
3716 }
3717
3718 bfd_boolean
3719 bfd_mach_o_read_symtab_strtab (bfd *abfd)
3720 {
3721 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3722 bfd_mach_o_symtab_command *sym = mdata->symtab;
3723
3724 /* Fail if there is no symtab. */
3725 if (sym == NULL)
3726 return FALSE;
3727
3728 /* Success if already loaded. */
3729 if (sym->strtab)
3730 return TRUE;
3731
3732 if (abfd->flags & BFD_IN_MEMORY)
3733 {
3734 struct bfd_in_memory *b;
3735
3736 b = (struct bfd_in_memory *) abfd->iostream;
3737
3738 if ((sym->stroff + sym->strsize) > b->size)
3739 {
3740 bfd_set_error (bfd_error_file_truncated);
3741 return FALSE;
3742 }
3743 sym->strtab = (char *) b->buffer + sym->stroff;
3744 }
3745 else
3746 {
3747 sym->strtab = bfd_alloc (abfd, sym->strsize + 1);
3748 if (sym->strtab == NULL)
3749 return FALSE;
3750
3751 if (bfd_seek (abfd, sym->stroff, SEEK_SET) != 0
3752 || bfd_bread (sym->strtab, sym->strsize, abfd) != sym->strsize)
3753 {
3754 /* PR 17512: file: 10888-1609-0.004. */
3755 bfd_release (abfd, sym->strtab);
3756 sym->strtab = NULL;
3757 bfd_set_error (bfd_error_file_truncated);
3758 return FALSE;
3759 }
3760 /* Zero terminate the string table. */
3761 sym->strtab[sym->strsize] = 0;
3762 }
3763
3764 return TRUE;
3765 }
3766
3767 bfd_boolean
3768 bfd_mach_o_read_symtab_symbols (bfd *abfd)
3769 {
3770 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3771 bfd_mach_o_symtab_command *sym = mdata->symtab;
3772 unsigned long i;
3773
3774 if (sym == NULL || sym->symbols)
3775 /* Return now if there are no symbols or if already loaded. */
3776 return TRUE;
3777
3778 sym->symbols = bfd_alloc2 (abfd, sym->nsyms, sizeof (bfd_mach_o_asymbol));
3779 if (sym->symbols == NULL)
3780 {
3781 _bfd_error_handler (_("bfd_mach_o_read_symtab_symbols: "
3782 "unable to allocate memory for symbols"));
3783 sym->nsyms = 0;
3784 return FALSE;
3785 }
3786
3787 if (!bfd_mach_o_read_symtab_strtab (abfd))
3788 goto fail;
3789
3790 for (i = 0; i < sym->nsyms; i++)
3791 if (!bfd_mach_o_read_symtab_symbol (abfd, sym, &sym->symbols[i], i))
3792 goto fail;
3793
3794 return TRUE;
3795
3796 fail:
3797 bfd_release (abfd, sym->symbols);
3798 sym->symbols = NULL;
3799 sym->nsyms = 0;
3800 return FALSE;
3801 }
3802
3803 static const char *
3804 bfd_mach_o_i386_flavour_string (unsigned int flavour)
3805 {
3806 switch ((int) flavour)
3807 {
3808 case BFD_MACH_O_x86_THREAD_STATE32: return "x86_THREAD_STATE32";
3809 case BFD_MACH_O_x86_FLOAT_STATE32: return "x86_FLOAT_STATE32";
3810 case BFD_MACH_O_x86_EXCEPTION_STATE32: return "x86_EXCEPTION_STATE32";
3811 case BFD_MACH_O_x86_THREAD_STATE64: return "x86_THREAD_STATE64";
3812 case BFD_MACH_O_x86_FLOAT_STATE64: return "x86_FLOAT_STATE64";
3813 case BFD_MACH_O_x86_EXCEPTION_STATE64: return "x86_EXCEPTION_STATE64";
3814 case BFD_MACH_O_x86_THREAD_STATE: return "x86_THREAD_STATE";
3815 case BFD_MACH_O_x86_FLOAT_STATE: return "x86_FLOAT_STATE";
3816 case BFD_MACH_O_x86_EXCEPTION_STATE: return "x86_EXCEPTION_STATE";
3817 case BFD_MACH_O_x86_DEBUG_STATE32: return "x86_DEBUG_STATE32";
3818 case BFD_MACH_O_x86_DEBUG_STATE64: return "x86_DEBUG_STATE64";
3819 case BFD_MACH_O_x86_DEBUG_STATE: return "x86_DEBUG_STATE";
3820 case BFD_MACH_O_x86_THREAD_STATE_NONE: return "x86_THREAD_STATE_NONE";
3821 default: return "UNKNOWN";
3822 }
3823 }
3824
3825 static const char *
3826 bfd_mach_o_ppc_flavour_string (unsigned int flavour)
3827 {
3828 switch ((int) flavour)
3829 {
3830 case BFD_MACH_O_PPC_THREAD_STATE: return "PPC_THREAD_STATE";
3831 case BFD_MACH_O_PPC_FLOAT_STATE: return "PPC_FLOAT_STATE";
3832 case BFD_MACH_O_PPC_EXCEPTION_STATE: return "PPC_EXCEPTION_STATE";
3833 case BFD_MACH_O_PPC_VECTOR_STATE: return "PPC_VECTOR_STATE";
3834 case BFD_MACH_O_PPC_THREAD_STATE64: return "PPC_THREAD_STATE64";
3835 case BFD_MACH_O_PPC_EXCEPTION_STATE64: return "PPC_EXCEPTION_STATE64";
3836 default: return "UNKNOWN";
3837 }
3838 }
3839
3840 static bfd_boolean
3841 bfd_mach_o_read_dylinker (bfd *abfd, bfd_mach_o_load_command *command)
3842 {
3843 bfd_mach_o_dylinker_command *cmd = &command->command.dylinker;
3844 struct mach_o_str_command_external raw;
3845 unsigned int nameoff;
3846 unsigned int namelen;
3847
3848 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3849 return FALSE;
3850
3851 nameoff = bfd_h_get_32 (abfd, raw.str);
3852
3853 cmd->name_offset = nameoff;
3854 namelen = command->len - nameoff;
3855 nameoff += command->offset;
3856 cmd->name_str = bfd_alloc (abfd, namelen);
3857 if (cmd->name_str == NULL)
3858 return FALSE;
3859 if (bfd_seek (abfd, nameoff, SEEK_SET) != 0
3860 || bfd_bread (cmd->name_str, namelen, abfd) != namelen)
3861 return FALSE;
3862 return TRUE;
3863 }
3864
3865 static bfd_boolean
3866 bfd_mach_o_read_dylib (bfd *abfd, bfd_mach_o_load_command *command)
3867 {
3868 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3869 bfd_mach_o_dylib_command *cmd = &command->command.dylib;
3870 struct mach_o_dylib_command_external raw;
3871 unsigned int nameoff;
3872 unsigned int namelen;
3873
3874 switch (command->type)
3875 {
3876 case BFD_MACH_O_LC_LOAD_DYLIB:
3877 case BFD_MACH_O_LC_LAZY_LOAD_DYLIB:
3878 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
3879 case BFD_MACH_O_LC_ID_DYLIB:
3880 case BFD_MACH_O_LC_REEXPORT_DYLIB:
3881 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
3882 break;
3883 default:
3884 BFD_FAIL ();
3885 return FALSE;
3886 }
3887
3888 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3889 return FALSE;
3890
3891 nameoff = bfd_h_get_32 (abfd, raw.name);
3892 cmd->timestamp = bfd_h_get_32 (abfd, raw.timestamp);
3893 cmd->current_version = bfd_h_get_32 (abfd, raw.current_version);
3894 cmd->compatibility_version = bfd_h_get_32 (abfd, raw.compatibility_version);
3895
3896 cmd->name_offset = command->offset + nameoff;
3897 namelen = command->len - nameoff;
3898 cmd->name_str = bfd_alloc (abfd, namelen);
3899 if (cmd->name_str == NULL)
3900 return FALSE;
3901 if (bfd_seek (abfd, mdata->hdr_offset + cmd->name_offset, SEEK_SET) != 0
3902 || bfd_bread (cmd->name_str, namelen, abfd) != namelen)
3903 return FALSE;
3904 return TRUE;
3905 }
3906
3907 static bfd_boolean
3908 bfd_mach_o_read_prebound_dylib (bfd *abfd,
3909 bfd_mach_o_load_command *command)
3910 {
3911 bfd_mach_o_prebound_dylib_command *cmd = &command->command.prebound_dylib;
3912 struct mach_o_prebound_dylib_command_external raw;
3913 unsigned int nameoff;
3914 unsigned int modoff;
3915 unsigned int str_len;
3916 unsigned char *str;
3917
3918 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3919 return FALSE;
3920
3921 nameoff = bfd_h_get_32 (abfd, raw.name);
3922 modoff = bfd_h_get_32 (abfd, raw.linked_modules);
3923 if (nameoff > command->len || modoff > command->len)
3924 return FALSE;
3925
3926 str_len = command->len - sizeof (raw);
3927 str = bfd_alloc (abfd, str_len);
3928 if (str == NULL)
3929 return FALSE;
3930 if (bfd_bread (str, str_len, abfd) != str_len)
3931 return FALSE;
3932
3933 cmd->name_offset = command->offset + nameoff;
3934 cmd->nmodules = bfd_h_get_32 (abfd, raw.nmodules);
3935 cmd->linked_modules_offset = command->offset + modoff;
3936
3937 cmd->name_str = (char *)str + nameoff - (sizeof (raw) + BFD_MACH_O_LC_SIZE);
3938 cmd->linked_modules = str + modoff - (sizeof (raw) + BFD_MACH_O_LC_SIZE);
3939 return TRUE;
3940 }
3941
3942 static bfd_boolean
3943 bfd_mach_o_read_prebind_cksum (bfd *abfd,
3944 bfd_mach_o_load_command *command)
3945 {
3946 bfd_mach_o_prebind_cksum_command *cmd = &command->command.prebind_cksum;
3947 struct mach_o_prebind_cksum_command_external raw;
3948
3949 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3950 return FALSE;
3951
3952 cmd->cksum = bfd_get_32 (abfd, raw.cksum);
3953 return TRUE;
3954 }
3955
3956 static bfd_boolean
3957 bfd_mach_o_read_twolevel_hints (bfd *abfd,
3958 bfd_mach_o_load_command *command)
3959 {
3960 bfd_mach_o_twolevel_hints_command *cmd = &command->command.twolevel_hints;
3961 struct mach_o_twolevel_hints_command_external raw;
3962
3963 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3964 return FALSE;
3965
3966 cmd->offset = bfd_get_32 (abfd, raw.offset);
3967 cmd->nhints = bfd_get_32 (abfd, raw.nhints);
3968 return TRUE;
3969 }
3970
3971 static bfd_boolean
3972 bfd_mach_o_read_fvmlib (bfd *abfd, bfd_mach_o_load_command *command)
3973 {
3974 bfd_mach_o_fvmlib_command *fvm = &command->command.fvmlib;
3975 struct mach_o_fvmlib_command_external raw;
3976 unsigned int nameoff;
3977 unsigned int namelen;
3978
3979 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3980 return FALSE;
3981
3982 nameoff = bfd_h_get_32 (abfd, raw.name);
3983 fvm->minor_version = bfd_h_get_32 (abfd, raw.minor_version);
3984 fvm->header_addr = bfd_h_get_32 (abfd, raw.header_addr);
3985
3986 fvm->name_offset = command->offset + nameoff;
3987 namelen = command->len - nameoff;
3988 fvm->name_str = bfd_alloc (abfd, namelen);
3989 if (fvm->name_str == NULL)
3990 return FALSE;
3991 if (bfd_seek (abfd, fvm->name_offset, SEEK_SET) != 0
3992 || bfd_bread (fvm->name_str, namelen, abfd) != namelen)
3993 return FALSE;
3994 return TRUE;
3995 }
3996
3997 static bfd_boolean
3998 bfd_mach_o_read_thread (bfd *abfd, bfd_mach_o_load_command *command)
3999 {
4000 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4001 bfd_mach_o_thread_command *cmd = &command->command.thread;
4002 unsigned int offset;
4003 unsigned int nflavours;
4004 unsigned int i;
4005
4006 BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD)
4007 || (command->type == BFD_MACH_O_LC_UNIXTHREAD));
4008
4009 /* Count the number of threads. */
4010 offset = 8;
4011 nflavours = 0;
4012 while (offset != command->len)
4013 {
4014 struct mach_o_thread_command_external raw;
4015
4016 if (offset >= command->len)
4017 return FALSE;
4018
4019 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
4020 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4021 return FALSE;
4022
4023 offset += sizeof (raw) + bfd_h_get_32 (abfd, raw.count) * 4;
4024 nflavours++;
4025 }
4026
4027 /* Allocate threads. */
4028 cmd->flavours = bfd_alloc2
4029 (abfd, nflavours, sizeof (bfd_mach_o_thread_flavour));
4030 if (cmd->flavours == NULL)
4031 return FALSE;
4032 cmd->nflavours = nflavours;
4033
4034 offset = 8;
4035 nflavours = 0;
4036 while (offset != command->len)
4037 {
4038 struct mach_o_thread_command_external raw;
4039
4040 if (offset >= command->len)
4041 return FALSE;
4042
4043 if (nflavours >= cmd->nflavours)
4044 return FALSE;
4045
4046 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
4047 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4048 return FALSE;
4049
4050 cmd->flavours[nflavours].flavour = bfd_h_get_32 (abfd, raw.flavour);
4051 cmd->flavours[nflavours].offset = command->offset + offset + sizeof (raw);
4052 cmd->flavours[nflavours].size = bfd_h_get_32 (abfd, raw.count) * 4;
4053 offset += cmd->flavours[nflavours].size + sizeof (raw);
4054 nflavours++;
4055 }
4056
4057 for (i = 0; i < nflavours; i++)
4058 {
4059 asection *bfdsec;
4060 unsigned int snamelen;
4061 char *sname;
4062 const char *flavourstr;
4063 const char *prefix = "LC_THREAD";
4064 unsigned int j = 0;
4065
4066 switch (mdata->header.cputype)
4067 {
4068 case BFD_MACH_O_CPU_TYPE_POWERPC:
4069 case BFD_MACH_O_CPU_TYPE_POWERPC_64:
4070 flavourstr =
4071 bfd_mach_o_ppc_flavour_string (cmd->flavours[i].flavour);
4072 break;
4073 case BFD_MACH_O_CPU_TYPE_I386:
4074 case BFD_MACH_O_CPU_TYPE_X86_64:
4075 flavourstr =
4076 bfd_mach_o_i386_flavour_string (cmd->flavours[i].flavour);
4077 break;
4078 default:
4079 flavourstr = "UNKNOWN_ARCHITECTURE";
4080 break;
4081 }
4082
4083 snamelen = strlen (prefix) + 1 + 20 + 1 + strlen (flavourstr) + 1;
4084 sname = bfd_alloc (abfd, snamelen);
4085 if (sname == NULL)
4086 return FALSE;
4087
4088 for (;;)
4089 {
4090 sprintf (sname, "%s.%s.%u", prefix, flavourstr, j);
4091 if (bfd_get_section_by_name (abfd, sname) == NULL)
4092 break;
4093 j++;
4094 }
4095
4096 bfdsec = bfd_make_section_with_flags (abfd, sname, SEC_HAS_CONTENTS);
4097
4098 bfdsec->vma = 0;
4099 bfdsec->lma = 0;
4100 bfdsec->size = cmd->flavours[i].size;
4101 bfdsec->filepos = cmd->flavours[i].offset;
4102 bfdsec->alignment_power = 0x0;
4103
4104 cmd->section = bfdsec;
4105 }
4106
4107 return TRUE;
4108 }
4109
4110 static bfd_boolean
4111 bfd_mach_o_read_dysymtab (bfd *abfd, bfd_mach_o_load_command *command)
4112 {
4113 bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab;
4114 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4115
4116 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB);
4117
4118 {
4119 struct mach_o_dysymtab_command_external raw;
4120
4121 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4122 return FALSE;
4123
4124 cmd->ilocalsym = bfd_h_get_32 (abfd, raw.ilocalsym);
4125 cmd->nlocalsym = bfd_h_get_32 (abfd, raw.nlocalsym);
4126 cmd->iextdefsym = bfd_h_get_32 (abfd, raw.iextdefsym);
4127 cmd->nextdefsym = bfd_h_get_32 (abfd, raw.nextdefsym);
4128 cmd->iundefsym = bfd_h_get_32 (abfd, raw.iundefsym);
4129 cmd->nundefsym = bfd_h_get_32 (abfd, raw.nundefsym);
4130 cmd->tocoff = bfd_h_get_32 (abfd, raw.tocoff);
4131 cmd->ntoc = bfd_h_get_32 (abfd, raw.ntoc);
4132 cmd->modtaboff = bfd_h_get_32 (abfd, raw.modtaboff);
4133 cmd->nmodtab = bfd_h_get_32 (abfd, raw.nmodtab);
4134 cmd->extrefsymoff = bfd_h_get_32 (abfd, raw.extrefsymoff);
4135 cmd->nextrefsyms = bfd_h_get_32 (abfd, raw.nextrefsyms);
4136 cmd->indirectsymoff = bfd_h_get_32 (abfd, raw.indirectsymoff);
4137 cmd->nindirectsyms = bfd_h_get_32 (abfd, raw.nindirectsyms);
4138 cmd->extreloff = bfd_h_get_32 (abfd, raw.extreloff);
4139 cmd->nextrel = bfd_h_get_32 (abfd, raw.nextrel);
4140 cmd->locreloff = bfd_h_get_32 (abfd, raw.locreloff);
4141 cmd->nlocrel = bfd_h_get_32 (abfd, raw.nlocrel);
4142 }
4143
4144 if (cmd->nmodtab != 0)
4145 {
4146 unsigned int i;
4147 int wide = bfd_mach_o_wide_p (abfd);
4148 unsigned int module_len = wide ? 56 : 52;
4149
4150 cmd->dylib_module =
4151 bfd_alloc2 (abfd, cmd->nmodtab, sizeof (bfd_mach_o_dylib_module));
4152 if (cmd->dylib_module == NULL)
4153 return FALSE;
4154
4155 if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0)
4156 return FALSE;
4157
4158 for (i = 0; i < cmd->nmodtab; i++)
4159 {
4160 bfd_mach_o_dylib_module *module = &cmd->dylib_module[i];
4161 unsigned long v;
4162 unsigned char buf[56];
4163
4164 if (bfd_bread ((void *) buf, module_len, abfd) != module_len)
4165 return FALSE;
4166
4167 module->module_name_idx = bfd_h_get_32 (abfd, buf + 0);
4168 module->iextdefsym = bfd_h_get_32 (abfd, buf + 4);
4169 module->nextdefsym = bfd_h_get_32 (abfd, buf + 8);
4170 module->irefsym = bfd_h_get_32 (abfd, buf + 12);
4171 module->nrefsym = bfd_h_get_32 (abfd, buf + 16);
4172 module->ilocalsym = bfd_h_get_32 (abfd, buf + 20);
4173 module->nlocalsym = bfd_h_get_32 (abfd, buf + 24);
4174 module->iextrel = bfd_h_get_32 (abfd, buf + 28);
4175 module->nextrel = bfd_h_get_32 (abfd, buf + 32);
4176 v = bfd_h_get_32 (abfd, buf +36);
4177 module->iinit = v & 0xffff;
4178 module->iterm = (v >> 16) & 0xffff;
4179 v = bfd_h_get_32 (abfd, buf + 40);
4180 module->ninit = v & 0xffff;
4181 module->nterm = (v >> 16) & 0xffff;
4182 if (wide)
4183 {
4184 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 44);
4185 module->objc_module_info_addr = bfd_h_get_64 (abfd, buf + 48);
4186 }
4187 else
4188 {
4189 module->objc_module_info_addr = bfd_h_get_32 (abfd, buf + 44);
4190 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 48);
4191 }
4192 }
4193 }
4194
4195 if (cmd->ntoc != 0)
4196 {
4197 unsigned long i;
4198
4199 cmd->dylib_toc = bfd_alloc2
4200 (abfd, cmd->ntoc, sizeof (bfd_mach_o_dylib_table_of_content));
4201 if (cmd->dylib_toc == NULL)
4202 return FALSE;
4203
4204 if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0)
4205 return FALSE;
4206
4207 for (i = 0; i < cmd->ntoc; i++)
4208 {
4209 struct mach_o_dylib_table_of_contents_external raw;
4210 bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i];
4211
4212 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4213 return FALSE;
4214
4215 toc->symbol_index = bfd_h_get_32 (abfd, raw.symbol_index);
4216 toc->module_index = bfd_h_get_32 (abfd, raw.module_index);
4217 }
4218 }
4219
4220 if (cmd->nindirectsyms != 0)
4221 {
4222 unsigned int i;
4223
4224 cmd->indirect_syms = bfd_alloc2
4225 (abfd, cmd->nindirectsyms, sizeof (unsigned int));
4226 if (cmd->indirect_syms == NULL)
4227 return FALSE;
4228
4229 if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0)
4230 return FALSE;
4231
4232 for (i = 0; i < cmd->nindirectsyms; i++)
4233 {
4234 unsigned char raw[4];
4235 unsigned int *is = &cmd->indirect_syms[i];
4236
4237 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw))
4238 return FALSE;
4239
4240 *is = bfd_h_get_32 (abfd, raw);
4241 }
4242 }
4243
4244 if (cmd->nextrefsyms != 0)
4245 {
4246 unsigned long v;
4247 unsigned int i;
4248
4249 cmd->ext_refs = bfd_alloc2
4250 (abfd, cmd->nextrefsyms, sizeof (bfd_mach_o_dylib_reference));
4251 if (cmd->ext_refs == NULL)
4252 return FALSE;
4253
4254 if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0)
4255 return FALSE;
4256
4257 for (i = 0; i < cmd->nextrefsyms; i++)
4258 {
4259 unsigned char raw[4];
4260 bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i];
4261
4262 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw))
4263 return FALSE;
4264
4265 /* Fields isym and flags are written as bit-fields, thus we need
4266 a specific processing for endianness. */
4267 v = bfd_h_get_32 (abfd, raw);
4268 if (bfd_big_endian (abfd))
4269 {
4270 ref->isym = (v >> 8) & 0xffffff;
4271 ref->flags = v & 0xff;
4272 }
4273 else
4274 {
4275 ref->isym = v & 0xffffff;
4276 ref->flags = (v >> 24) & 0xff;
4277 }
4278 }
4279 }
4280
4281 if (mdata->dysymtab)
4282 return FALSE;
4283 mdata->dysymtab = cmd;
4284
4285 return TRUE;
4286 }
4287
4288 static bfd_boolean
4289 bfd_mach_o_read_symtab (bfd *abfd, bfd_mach_o_load_command *command)
4290 {
4291 bfd_mach_o_symtab_command *symtab = &command->command.symtab;
4292 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4293 struct mach_o_symtab_command_external raw;
4294
4295 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB);
4296
4297 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4298 return FALSE;
4299
4300 symtab->symoff = bfd_h_get_32 (abfd, raw.symoff);
4301 symtab->nsyms = bfd_h_get_32 (abfd, raw.nsyms);
4302 symtab->stroff = bfd_h_get_32 (abfd, raw.stroff);
4303 symtab->strsize = bfd_h_get_32 (abfd, raw.strsize);
4304 symtab->symbols = NULL;
4305 symtab->strtab = NULL;
4306
4307 if (symtab->nsyms != 0)
4308 abfd->flags |= HAS_SYMS;
4309
4310 if (mdata->symtab)
4311 return FALSE;
4312 mdata->symtab = symtab;
4313 return TRUE;
4314 }
4315
4316 static bfd_boolean
4317 bfd_mach_o_read_uuid (bfd *abfd, bfd_mach_o_load_command *command)
4318 {
4319 bfd_mach_o_uuid_command *cmd = &command->command.uuid;
4320
4321 BFD_ASSERT (command->type == BFD_MACH_O_LC_UUID);
4322
4323 if (bfd_bread (cmd->uuid, 16, abfd) != 16)
4324 return FALSE;
4325
4326 return TRUE;
4327 }
4328
4329 static bfd_boolean
4330 bfd_mach_o_read_linkedit (bfd *abfd, bfd_mach_o_load_command *command)
4331 {
4332 bfd_mach_o_linkedit_command *cmd = &command->command.linkedit;
4333 struct mach_o_linkedit_data_command_external raw;
4334
4335 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4336 return FALSE;
4337
4338 cmd->dataoff = bfd_get_32 (abfd, raw.dataoff);
4339 cmd->datasize = bfd_get_32 (abfd, raw.datasize);
4340 return TRUE;
4341 }
4342
4343 static bfd_boolean
4344 bfd_mach_o_read_str (bfd *abfd, bfd_mach_o_load_command *command)
4345 {
4346 bfd_mach_o_str_command *cmd = &command->command.str;
4347 struct mach_o_str_command_external raw;
4348 unsigned long off;
4349
4350 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4351 return FALSE;
4352
4353 off = bfd_get_32 (abfd, raw.str);
4354 cmd->stroff = command->offset + off;
4355 cmd->str_len = command->len - off;
4356 cmd->str = bfd_alloc (abfd, cmd->str_len);
4357 if (cmd->str == NULL)
4358 return FALSE;
4359 if (bfd_seek (abfd, cmd->stroff, SEEK_SET) != 0
4360 || bfd_bread ((void *) cmd->str, cmd->str_len, abfd) != cmd->str_len)
4361 return FALSE;
4362 return TRUE;
4363 }
4364
4365 static unsigned char *
4366 bfd_mach_o_alloc_and_read (bfd *abfd, unsigned int off, unsigned int size)
4367 {
4368 unsigned char *buf;
4369
4370 buf = bfd_alloc (abfd, size);
4371 if (buf == NULL)
4372 return NULL;
4373 if (bfd_seek (abfd, off, SEEK_SET) != 0
4374 || bfd_bread (buf, size, abfd) != size)
4375 return NULL;
4376 return buf;
4377 }
4378
4379 static bfd_boolean
4380 bfd_mach_o_read_dyld_content (bfd *abfd, bfd_mach_o_dyld_info_command *cmd)
4381 {
4382 /* Read rebase content. */
4383 if (cmd->rebase_content == NULL && cmd->rebase_size != 0)
4384 {
4385 cmd->rebase_content =
4386 bfd_mach_o_alloc_and_read (abfd, cmd->rebase_off, cmd->rebase_size);
4387 if (cmd->rebase_content == NULL)
4388 return FALSE;
4389 }
4390
4391 /* Read bind content. */
4392 if (cmd->bind_content == NULL && cmd->bind_size != 0)
4393 {
4394 cmd->bind_content =
4395 bfd_mach_o_alloc_and_read (abfd, cmd->bind_off, cmd->bind_size);
4396 if (cmd->bind_content == NULL)
4397 return FALSE;
4398 }
4399
4400 /* Read weak bind content. */
4401 if (cmd->weak_bind_content == NULL && cmd->weak_bind_size != 0)
4402 {
4403 cmd->weak_bind_content = bfd_mach_o_alloc_and_read
4404 (abfd, cmd->weak_bind_off, cmd->weak_bind_size);
4405 if (cmd->weak_bind_content == NULL)
4406 return FALSE;
4407 }
4408
4409 /* Read lazy bind content. */
4410 if (cmd->lazy_bind_content == NULL && cmd->lazy_bind_size != 0)
4411 {
4412 cmd->lazy_bind_content = bfd_mach_o_alloc_and_read
4413 (abfd, cmd->lazy_bind_off, cmd->lazy_bind_size);
4414 if (cmd->lazy_bind_content == NULL)
4415 return FALSE;
4416 }
4417
4418 /* Read export content. */
4419 if (cmd->export_content == NULL && cmd->export_size != 0)
4420 {
4421 cmd->export_content = bfd_mach_o_alloc_and_read
4422 (abfd, cmd->export_off, cmd->export_size);
4423 if (cmd->export_content == NULL)
4424 return FALSE;
4425 }
4426
4427 return TRUE;
4428 }
4429
4430 static bfd_boolean
4431 bfd_mach_o_read_dyld_info (bfd *abfd, bfd_mach_o_load_command *command)
4432 {
4433 bfd_mach_o_dyld_info_command *cmd = &command->command.dyld_info;
4434 struct mach_o_dyld_info_command_external raw;
4435
4436 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4437 return FALSE;
4438
4439 cmd->rebase_off = bfd_get_32 (abfd, raw.rebase_off);
4440 cmd->rebase_size = bfd_get_32 (abfd, raw.rebase_size);
4441 cmd->rebase_content = NULL;
4442 cmd->bind_off = bfd_get_32 (abfd, raw.bind_off);
4443 cmd->bind_size = bfd_get_32 (abfd, raw.bind_size);
4444 cmd->bind_content = NULL;
4445 cmd->weak_bind_off = bfd_get_32 (abfd, raw.weak_bind_off);
4446 cmd->weak_bind_size = bfd_get_32 (abfd, raw.weak_bind_size);
4447 cmd->weak_bind_content = NULL;
4448 cmd->lazy_bind_off = bfd_get_32 (abfd, raw.lazy_bind_off);
4449 cmd->lazy_bind_size = bfd_get_32 (abfd, raw.lazy_bind_size);
4450 cmd->lazy_bind_content = NULL;
4451 cmd->export_off = bfd_get_32 (abfd, raw.export_off);
4452 cmd->export_size = bfd_get_32 (abfd, raw.export_size);
4453 cmd->export_content = NULL;
4454 return TRUE;
4455 }
4456
4457 static bfd_boolean
4458 bfd_mach_o_read_version_min (bfd *abfd, bfd_mach_o_load_command *command)
4459 {
4460 bfd_mach_o_version_min_command *cmd = &command->command.version_min;
4461 struct mach_o_version_min_command_external raw;
4462 unsigned int ver;
4463
4464 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4465 return FALSE;
4466
4467 ver = bfd_get_32 (abfd, raw.version);
4468 cmd->rel = ver >> 16;
4469 cmd->maj = ver >> 8;
4470 cmd->min = ver;
4471 cmd->reserved = bfd_get_32 (abfd, raw.reserved);
4472 return TRUE;
4473 }
4474
4475 static bfd_boolean
4476 bfd_mach_o_read_encryption_info (bfd *abfd, bfd_mach_o_load_command *command)
4477 {
4478 bfd_mach_o_encryption_info_command *cmd = &command->command.encryption_info;
4479 struct mach_o_encryption_info_command_external raw;
4480
4481 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4482 return FALSE;
4483
4484 cmd->cryptoff = bfd_get_32 (abfd, raw.cryptoff);
4485 cmd->cryptsize = bfd_get_32 (abfd, raw.cryptsize);
4486 cmd->cryptid = bfd_get_32 (abfd, raw.cryptid);
4487 return TRUE;
4488 }
4489
4490 static bfd_boolean
4491 bfd_mach_o_read_encryption_info_64 (bfd *abfd, bfd_mach_o_load_command *command)
4492 {
4493 bfd_mach_o_encryption_info_command *cmd = &command->command.encryption_info;
4494 struct mach_o_encryption_info_64_command_external raw;
4495
4496 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4497 return FALSE;
4498
4499 cmd->cryptoff = bfd_get_32 (abfd, raw.cryptoff);
4500 cmd->cryptsize = bfd_get_32 (abfd, raw.cryptsize);
4501 cmd->cryptid = bfd_get_32 (abfd, raw.cryptid);
4502 return TRUE;
4503 }
4504
4505 static bfd_boolean
4506 bfd_mach_o_read_main (bfd *abfd, bfd_mach_o_load_command *command)
4507 {
4508 bfd_mach_o_main_command *cmd = &command->command.main;
4509 struct mach_o_entry_point_command_external raw;
4510
4511 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4512 return FALSE;
4513
4514 cmd->entryoff = bfd_get_64 (abfd, raw.entryoff);
4515 cmd->stacksize = bfd_get_64 (abfd, raw.stacksize);
4516 return TRUE;
4517 }
4518
4519 static bfd_boolean
4520 bfd_mach_o_read_source_version (bfd *abfd, bfd_mach_o_load_command *command)
4521 {
4522 bfd_mach_o_source_version_command *cmd = &command->command.source_version;
4523 struct mach_o_source_version_command_external raw;
4524 bfd_uint64_t ver;
4525
4526 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4527 return FALSE;
4528
4529 ver = bfd_get_64 (abfd, raw.version);
4530 /* Note: we use a serie of shift to avoid shift > 32 (for which gcc
4531 generates warnings) in case of the host doesn't support 64 bit
4532 integers. */
4533 cmd->e = ver & 0x3ff;
4534 ver >>= 10;
4535 cmd->d = ver & 0x3ff;
4536 ver >>= 10;
4537 cmd->c = ver & 0x3ff;
4538 ver >>= 10;
4539 cmd->b = ver & 0x3ff;
4540 ver >>= 10;
4541 cmd->a = ver & 0xffffff;
4542 return TRUE;
4543 }
4544
4545 static bfd_boolean
4546 bfd_mach_o_read_segment (bfd *abfd,
4547 bfd_mach_o_load_command *command,
4548 unsigned int wide)
4549 {
4550 bfd_mach_o_segment_command *seg = &command->command.segment;
4551 unsigned long i;
4552
4553 if (wide)
4554 {
4555 struct mach_o_segment_command_64_external raw;
4556
4557 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64);
4558
4559 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4560 return FALSE;
4561
4562 memcpy (seg->segname, raw.segname, 16);
4563 seg->segname[16] = '\0';
4564
4565 seg->vmaddr = bfd_h_get_64 (abfd, raw.vmaddr);
4566 seg->vmsize = bfd_h_get_64 (abfd, raw.vmsize);
4567 seg->fileoff = bfd_h_get_64 (abfd, raw.fileoff);
4568 seg->filesize = bfd_h_get_64 (abfd, raw.filesize);
4569 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot);
4570 seg->initprot = bfd_h_get_32 (abfd, raw.initprot);
4571 seg->nsects = bfd_h_get_32 (abfd, raw.nsects);
4572 seg->flags = bfd_h_get_32 (abfd, raw.flags);
4573 }
4574 else
4575 {
4576 struct mach_o_segment_command_32_external raw;
4577
4578 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT);
4579
4580 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4581 return FALSE;
4582
4583 memcpy (seg->segname, raw.segname, 16);
4584 seg->segname[16] = '\0';
4585
4586 seg->vmaddr = bfd_h_get_32 (abfd, raw.vmaddr);
4587 seg->vmsize = bfd_h_get_32 (abfd, raw.vmsize);
4588 seg->fileoff = bfd_h_get_32 (abfd, raw.fileoff);
4589 seg->filesize = bfd_h_get_32 (abfd, raw.filesize);
4590 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot);
4591 seg->initprot = bfd_h_get_32 (abfd, raw.initprot);
4592 seg->nsects = bfd_h_get_32 (abfd, raw.nsects);
4593 seg->flags = bfd_h_get_32 (abfd, raw.flags);
4594 }
4595 seg->sect_head = NULL;
4596 seg->sect_tail = NULL;
4597
4598 for (i = 0; i < seg->nsects; i++)
4599 {
4600 asection *sec;
4601
4602 sec = bfd_mach_o_read_section (abfd, seg->initprot, wide);
4603 if (sec == NULL)
4604 return FALSE;
4605
4606 bfd_mach_o_append_section_to_segment
4607 (seg, bfd_mach_o_get_mach_o_section (sec));
4608 }
4609
4610 return TRUE;
4611 }
4612
4613 static bfd_boolean
4614 bfd_mach_o_read_segment_32 (bfd *abfd, bfd_mach_o_load_command *command)
4615 {
4616 return bfd_mach_o_read_segment (abfd, command, 0);
4617 }
4618
4619 static bfd_boolean
4620 bfd_mach_o_read_segment_64 (bfd *abfd, bfd_mach_o_load_command *command)
4621 {
4622 return bfd_mach_o_read_segment (abfd, command, 1);
4623 }
4624
4625 static bfd_boolean
4626 bfd_mach_o_read_command (bfd *abfd, bfd_mach_o_load_command *command)
4627 {
4628 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4629 struct mach_o_load_command_external raw;
4630 unsigned int cmd;
4631
4632 /* Read command type and length. */
4633 if (bfd_seek (abfd, mdata->hdr_offset + command->offset, SEEK_SET) != 0
4634 || bfd_bread (&raw, BFD_MACH_O_LC_SIZE, abfd) != BFD_MACH_O_LC_SIZE)
4635 return FALSE;
4636
4637 cmd = bfd_h_get_32 (abfd, raw.cmd);
4638 command->type = cmd & ~BFD_MACH_O_LC_REQ_DYLD;
4639 command->type_required = cmd & BFD_MACH_O_LC_REQ_DYLD ? TRUE : FALSE;
4640 command->len = bfd_h_get_32 (abfd, raw.cmdsize);
4641
4642 switch (command->type)
4643 {
4644 case BFD_MACH_O_LC_SEGMENT:
4645 if (!bfd_mach_o_read_segment_32 (abfd, command))
4646 return FALSE;
4647 break;
4648 case BFD_MACH_O_LC_SEGMENT_64:
4649 if (!bfd_mach_o_read_segment_64 (abfd, command))
4650 return FALSE;
4651 break;
4652 case BFD_MACH_O_LC_SYMTAB:
4653 if (!bfd_mach_o_read_symtab (abfd, command))
4654 return FALSE;
4655 break;
4656 case BFD_MACH_O_LC_SYMSEG:
4657 break;
4658 case BFD_MACH_O_LC_THREAD:
4659 case BFD_MACH_O_LC_UNIXTHREAD:
4660 if (!bfd_mach_o_read_thread (abfd, command))
4661 return FALSE;
4662 break;
4663 case BFD_MACH_O_LC_LOAD_DYLINKER:
4664 case BFD_MACH_O_LC_ID_DYLINKER:
4665 case BFD_MACH_O_LC_DYLD_ENVIRONMENT:
4666 if (!bfd_mach_o_read_dylinker (abfd, command))
4667 return FALSE;
4668 break;
4669 case BFD_MACH_O_LC_LOAD_DYLIB:
4670 case BFD_MACH_O_LC_LAZY_LOAD_DYLIB:
4671 case BFD_MACH_O_LC_ID_DYLIB:
4672 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
4673 case BFD_MACH_O_LC_REEXPORT_DYLIB:
4674 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
4675 if (!bfd_mach_o_read_dylib (abfd, command))
4676 return FALSE;
4677 break;
4678 case BFD_MACH_O_LC_PREBOUND_DYLIB:
4679 if (!bfd_mach_o_read_prebound_dylib (abfd, command))
4680 return FALSE;
4681 break;
4682 case BFD_MACH_O_LC_LOADFVMLIB:
4683 case BFD_MACH_O_LC_IDFVMLIB:
4684 if (!bfd_mach_o_read_fvmlib (abfd, command))
4685 return FALSE;
4686 break;
4687 case BFD_MACH_O_LC_IDENT:
4688 case BFD_MACH_O_LC_FVMFILE:
4689 case BFD_MACH_O_LC_PREPAGE:
4690 case BFD_MACH_O_LC_ROUTINES:
4691 case BFD_MACH_O_LC_ROUTINES_64:
4692 break;
4693 case BFD_MACH_O_LC_SUB_FRAMEWORK:
4694 case BFD_MACH_O_LC_SUB_UMBRELLA:
4695 case BFD_MACH_O_LC_SUB_LIBRARY:
4696 case BFD_MACH_O_LC_SUB_CLIENT:
4697 case BFD_MACH_O_LC_RPATH:
4698 if (!bfd_mach_o_read_str (abfd, command))
4699 return FALSE;
4700 break;
4701 case BFD_MACH_O_LC_DYSYMTAB:
4702 if (!bfd_mach_o_read_dysymtab (abfd, command))
4703 return FALSE;
4704 break;
4705 case BFD_MACH_O_LC_PREBIND_CKSUM:
4706 if (!bfd_mach_o_read_prebind_cksum (abfd, command))
4707 return FALSE;
4708 break;
4709 case BFD_MACH_O_LC_TWOLEVEL_HINTS:
4710 if (!bfd_mach_o_read_twolevel_hints (abfd, command))
4711 return FALSE;
4712 break;
4713 case BFD_MACH_O_LC_UUID:
4714 if (!bfd_mach_o_read_uuid (abfd, command))
4715 return FALSE;
4716 break;
4717 case BFD_MACH_O_LC_CODE_SIGNATURE:
4718 case BFD_MACH_O_LC_SEGMENT_SPLIT_INFO:
4719 case BFD_MACH_O_LC_FUNCTION_STARTS:
4720 case BFD_MACH_O_LC_DATA_IN_CODE:
4721 case BFD_MACH_O_LC_DYLIB_CODE_SIGN_DRS:
4722 case BFD_MACH_O_LC_LINKER_OPTIMIZATION_HINT:
4723 if (!bfd_mach_o_read_linkedit (abfd, command))
4724 return FALSE;
4725 break;
4726 case BFD_MACH_O_LC_ENCRYPTION_INFO:
4727 if (!bfd_mach_o_read_encryption_info (abfd, command))
4728 return FALSE;
4729 break;
4730 case BFD_MACH_O_LC_ENCRYPTION_INFO_64:
4731 if (!bfd_mach_o_read_encryption_info_64 (abfd, command))
4732 return FALSE;
4733 break;
4734 case BFD_MACH_O_LC_DYLD_INFO:
4735 if (!bfd_mach_o_read_dyld_info (abfd, command))
4736 return FALSE;
4737 break;
4738 case BFD_MACH_O_LC_VERSION_MIN_MACOSX:
4739 case BFD_MACH_O_LC_VERSION_MIN_IPHONEOS:
4740 case BFD_MACH_O_LC_VERSION_MIN_WATCHOS:
4741 if (!bfd_mach_o_read_version_min (abfd, command))
4742 return FALSE;
4743 break;
4744 case BFD_MACH_O_LC_MAIN:
4745 if (!bfd_mach_o_read_main (abfd, command))
4746 return FALSE;
4747 break;
4748 case BFD_MACH_O_LC_SOURCE_VERSION:
4749 if (!bfd_mach_o_read_source_version (abfd, command))
4750 return FALSE;
4751 break;
4752 default:
4753 command->len = 0;
4754 _bfd_error_handler (_("%B: unknown load command 0x%lx"),
4755 abfd, (unsigned long) command->type);
4756 return FALSE;
4757 }
4758
4759 return TRUE;
4760 }
4761
4762 static void
4763 bfd_mach_o_flatten_sections (bfd *abfd)
4764 {
4765 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4766 bfd_mach_o_load_command *cmd;
4767 long csect = 0;
4768
4769 /* Count total number of sections. */
4770 mdata->nsects = 0;
4771
4772 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
4773 {
4774 if (cmd->type == BFD_MACH_O_LC_SEGMENT
4775 || cmd->type == BFD_MACH_O_LC_SEGMENT_64)
4776 {
4777 bfd_mach_o_segment_command *seg = &cmd->command.segment;
4778
4779 mdata->nsects += seg->nsects;
4780 }
4781 }
4782
4783 /* Allocate sections array. */
4784 mdata->sections = bfd_alloc2 (abfd,
4785 mdata->nsects, sizeof (bfd_mach_o_section *));
4786
4787 /* Fill the array. */
4788 csect = 0;
4789
4790 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
4791 {
4792 if (cmd->type == BFD_MACH_O_LC_SEGMENT
4793 || cmd->type == BFD_MACH_O_LC_SEGMENT_64)
4794 {
4795 bfd_mach_o_segment_command *seg = &cmd->command.segment;
4796 bfd_mach_o_section *sec;
4797
4798 BFD_ASSERT (csect + seg->nsects <= mdata->nsects);
4799
4800 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
4801 mdata->sections[csect++] = sec;
4802 }
4803 }
4804 }
4805
4806 static bfd_boolean
4807 bfd_mach_o_scan_start_address (bfd *abfd)
4808 {
4809 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4810 bfd_mach_o_thread_command *thr = NULL;
4811 bfd_mach_o_load_command *cmd;
4812 unsigned long i;
4813
4814 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
4815 if (cmd->type == BFD_MACH_O_LC_THREAD
4816 || cmd->type == BFD_MACH_O_LC_UNIXTHREAD)
4817 {
4818 thr = &cmd->command.thread;
4819 break;
4820 }
4821 else if (cmd->type == BFD_MACH_O_LC_MAIN && mdata->nsects > 1)
4822 {
4823 bfd_mach_o_main_command *main_cmd = &cmd->command.main;
4824 bfd_mach_o_section *text_sect = mdata->sections[0];
4825
4826 if (text_sect)
4827 {
4828 abfd->start_address = main_cmd->entryoff
4829 + (text_sect->addr - text_sect->offset);
4830 return TRUE;
4831 }
4832 }
4833
4834 /* An object file has no start address, so do not fail if not found. */
4835 if (thr == NULL)
4836 return TRUE;
4837
4838 /* FIXME: create a subtarget hook ? */
4839 for (i = 0; i < thr->nflavours; i++)
4840 {
4841 if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_I386)
4842 && (thr->flavours[i].flavour == BFD_MACH_O_x86_THREAD_STATE32))
4843 {
4844 unsigned char buf[4];
4845
4846 if (bfd_seek (abfd, thr->flavours[i].offset + 40, SEEK_SET) != 0
4847 || bfd_bread (buf, 4, abfd) != 4)
4848 return FALSE;
4849
4850 abfd->start_address = bfd_h_get_32 (abfd, buf);
4851 }
4852 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC)
4853 && (thr->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE))
4854 {
4855 unsigned char buf[4];
4856
4857 if (bfd_seek (abfd, thr->flavours[i].offset + 0, SEEK_SET) != 0
4858 || bfd_bread (buf, 4, abfd) != 4)
4859 return FALSE;
4860
4861 abfd->start_address = bfd_h_get_32 (abfd, buf);
4862 }
4863 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC_64)
4864 && (thr->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE64))
4865 {
4866 unsigned char buf[8];
4867
4868 if (bfd_seek (abfd, thr->flavours[i].offset + 0, SEEK_SET) != 0
4869 || bfd_bread (buf, 8, abfd) != 8)
4870 return FALSE;
4871
4872 abfd->start_address = bfd_h_get_64 (abfd, buf);
4873 }
4874 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_X86_64)
4875 && (thr->flavours[i].flavour == BFD_MACH_O_x86_THREAD_STATE64))
4876 {
4877 unsigned char buf[8];
4878
4879 if (bfd_seek (abfd, thr->flavours[i].offset + (16 * 8), SEEK_SET) != 0
4880 || bfd_bread (buf, 8, abfd) != 8)
4881 return FALSE;
4882
4883 abfd->start_address = bfd_h_get_64 (abfd, buf);
4884 }
4885 }
4886
4887 return TRUE;
4888 }
4889
4890 bfd_boolean
4891 bfd_mach_o_set_arch_mach (bfd *abfd,
4892 enum bfd_architecture arch,
4893 unsigned long machine)
4894 {
4895 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
4896
4897 /* If this isn't the right architecture for this backend, and this
4898 isn't the generic backend, fail. */
4899 if (arch != bed->arch
4900 && arch != bfd_arch_unknown
4901 && bed->arch != bfd_arch_unknown)
4902 return FALSE;
4903
4904 return bfd_default_set_arch_mach (abfd, arch, machine);
4905 }
4906
4907 static bfd_boolean
4908 bfd_mach_o_scan (bfd *abfd,
4909 bfd_mach_o_header *header,
4910 bfd_mach_o_data_struct *mdata)
4911 {
4912 unsigned int i;
4913 enum bfd_architecture cputype;
4914 unsigned long cpusubtype;
4915 unsigned int hdrsize;
4916
4917 hdrsize = mach_o_wide_p (header) ?
4918 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
4919
4920 mdata->header = *header;
4921
4922 abfd->flags = abfd->flags & BFD_IN_MEMORY;
4923 switch (header->filetype)
4924 {
4925 case BFD_MACH_O_MH_OBJECT:
4926 abfd->flags |= HAS_RELOC;
4927 break;
4928 case BFD_MACH_O_MH_EXECUTE:
4929 abfd->flags |= EXEC_P;
4930 break;
4931 case BFD_MACH_O_MH_DYLIB:
4932 case BFD_MACH_O_MH_BUNDLE:
4933 abfd->flags |= DYNAMIC;
4934 break;
4935 }
4936
4937 abfd->tdata.mach_o_data = mdata;
4938
4939 bfd_mach_o_convert_architecture (header->cputype, header->cpusubtype,
4940 &cputype, &cpusubtype);
4941 if (cputype == bfd_arch_unknown)
4942 {
4943 _bfd_error_handler
4944 (_("bfd_mach_o_scan: unknown architecture 0x%lx/0x%lx"),
4945 header->cputype, header->cpusubtype);
4946 return FALSE;
4947 }
4948
4949 bfd_set_arch_mach (abfd, cputype, cpusubtype);
4950
4951 if (header->ncmds != 0)
4952 {
4953 bfd_mach_o_load_command *cmd;
4954
4955 mdata->first_command = NULL;
4956 mdata->last_command = NULL;
4957
4958 cmd = bfd_alloc2 (abfd, header->ncmds, sizeof (bfd_mach_o_load_command));
4959 if (cmd == NULL)
4960 return FALSE;
4961
4962 for (i = 0; i < header->ncmds; i++)
4963 {
4964 bfd_mach_o_load_command *cur = &cmd[i];
4965
4966 bfd_mach_o_append_command (abfd, cur);
4967
4968 if (i == 0)
4969 cur->offset = hdrsize;
4970 else
4971 {
4972 bfd_mach_o_load_command *prev = &cmd[i - 1];
4973 cur->offset = prev->offset + prev->len;
4974 }
4975
4976 if (!bfd_mach_o_read_command (abfd, cur))
4977 return FALSE;
4978 }
4979 }
4980
4981 /* Sections should be flatten before scanning start address. */
4982 bfd_mach_o_flatten_sections (abfd);
4983 if (!bfd_mach_o_scan_start_address (abfd))
4984 return FALSE;
4985
4986 return TRUE;
4987 }
4988
4989 bfd_boolean
4990 bfd_mach_o_mkobject_init (bfd *abfd)
4991 {
4992 bfd_mach_o_data_struct *mdata = NULL;
4993
4994 mdata = bfd_zalloc (abfd, sizeof (bfd_mach_o_data_struct));
4995 if (mdata == NULL)
4996 return FALSE;
4997 abfd->tdata.mach_o_data = mdata;
4998
4999 mdata->header.magic = 0;
5000 mdata->header.cputype = 0;
5001 mdata->header.cpusubtype = 0;
5002 mdata->header.filetype = 0;
5003 mdata->header.ncmds = 0;
5004 mdata->header.sizeofcmds = 0;
5005 mdata->header.flags = 0;
5006 mdata->header.byteorder = BFD_ENDIAN_UNKNOWN;
5007 mdata->first_command = NULL;
5008 mdata->last_command = NULL;
5009 mdata->nsects = 0;
5010 mdata->sections = NULL;
5011 mdata->dyn_reloc_cache = NULL;
5012
5013 return TRUE;
5014 }
5015
5016 static bfd_boolean
5017 bfd_mach_o_gen_mkobject (bfd *abfd)
5018 {
5019 bfd_mach_o_data_struct *mdata;
5020
5021 if (!bfd_mach_o_mkobject_init (abfd))
5022 return FALSE;
5023
5024 mdata = bfd_mach_o_get_data (abfd);
5025 mdata->header.magic = BFD_MACH_O_MH_MAGIC;
5026 mdata->header.cputype = 0;
5027 mdata->header.cpusubtype = 0;
5028 mdata->header.byteorder = abfd->xvec->byteorder;
5029 mdata->header.version = 1;
5030
5031 return TRUE;
5032 }
5033
5034 const bfd_target *
5035 bfd_mach_o_header_p (bfd *abfd,
5036 file_ptr hdr_off,
5037 bfd_mach_o_filetype filetype,
5038 bfd_mach_o_cpu_type cputype)
5039 {
5040 bfd_mach_o_header header;
5041 bfd_mach_o_data_struct *mdata;
5042
5043 if (!bfd_mach_o_read_header (abfd, hdr_off, &header))
5044 goto wrong;
5045
5046 if (! (header.byteorder == BFD_ENDIAN_BIG
5047 || header.byteorder == BFD_ENDIAN_LITTLE))
5048 {
5049 _bfd_error_handler (_("unknown header byte-order value 0x%lx"),
5050 (unsigned long) header.byteorder);
5051 goto wrong;
5052 }
5053
5054 if (! ((header.byteorder == BFD_ENDIAN_BIG
5055 && abfd->xvec->byteorder == BFD_ENDIAN_BIG
5056 && abfd->xvec->header_byteorder == BFD_ENDIAN_BIG)
5057 || (header.byteorder == BFD_ENDIAN_LITTLE
5058 && abfd->xvec->byteorder == BFD_ENDIAN_LITTLE
5059 && abfd->xvec->header_byteorder == BFD_ENDIAN_LITTLE)))
5060 goto wrong;
5061
5062 /* Check cputype and filetype.
5063 In case of wildcard, do not accept magics that are handled by existing
5064 targets. */
5065 if (cputype)
5066 {
5067 if (header.cputype != cputype)
5068 goto wrong;
5069 }
5070 else
5071 {
5072 #ifndef BFD64
5073 /* Do not recognize 64 architectures if not configured for 64bit targets.
5074 This could happen only for generic targets. */
5075 if (mach_o_wide_p (&header))
5076 goto wrong;
5077 #endif
5078 }
5079
5080 if (filetype)
5081 {
5082 if (header.filetype != filetype)
5083 goto wrong;
5084 }
5085 else
5086 {
5087 switch (header.filetype)
5088 {
5089 case BFD_MACH_O_MH_CORE:
5090 /* Handled by core_p */
5091 goto wrong;
5092 default:
5093 break;
5094 }
5095 }
5096
5097 mdata = (bfd_mach_o_data_struct *) bfd_zalloc (abfd, sizeof (*mdata));
5098 if (mdata == NULL)
5099 goto fail;
5100 mdata->hdr_offset = hdr_off;
5101
5102 if (!bfd_mach_o_scan (abfd, &header, mdata))
5103 goto wrong;
5104
5105 return abfd->xvec;
5106
5107 wrong:
5108 bfd_set_error (bfd_error_wrong_format);
5109
5110 fail:
5111 return NULL;
5112 }
5113
5114 static const bfd_target *
5115 bfd_mach_o_gen_object_p (bfd *abfd)
5116 {
5117 return bfd_mach_o_header_p (abfd, 0, 0, 0);
5118 }
5119
5120 static const bfd_target *
5121 bfd_mach_o_gen_core_p (bfd *abfd)
5122 {
5123 return bfd_mach_o_header_p (abfd, 0, BFD_MACH_O_MH_CORE, 0);
5124 }
5125
5126 /* Return the base address of ABFD, ie the address at which the image is
5127 mapped. The possible initial pagezero is ignored. */
5128
5129 bfd_vma
5130 bfd_mach_o_get_base_address (bfd *abfd)
5131 {
5132 bfd_mach_o_data_struct *mdata;
5133 bfd_mach_o_load_command *cmd;
5134
5135 /* Check for Mach-O. */
5136 if (!bfd_mach_o_valid (abfd))
5137 return 0;
5138 mdata = bfd_mach_o_get_data (abfd);
5139
5140 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5141 {
5142 if ((cmd->type == BFD_MACH_O_LC_SEGMENT
5143 || cmd->type == BFD_MACH_O_LC_SEGMENT_64))
5144 {
5145 struct bfd_mach_o_segment_command *segcmd = &cmd->command.segment;
5146
5147 if (segcmd->initprot != 0)
5148 return segcmd->vmaddr;
5149 }
5150 }
5151 return 0;
5152 }
5153
5154 typedef struct mach_o_fat_archentry
5155 {
5156 unsigned long cputype;
5157 unsigned long cpusubtype;
5158 unsigned long offset;
5159 unsigned long size;
5160 unsigned long align;
5161 } mach_o_fat_archentry;
5162
5163 typedef struct mach_o_fat_data_struct
5164 {
5165 unsigned long magic;
5166 unsigned long nfat_arch;
5167 mach_o_fat_archentry *archentries;
5168 } mach_o_fat_data_struct;
5169
5170 const bfd_target *
5171 bfd_mach_o_fat_archive_p (bfd *abfd)
5172 {
5173 mach_o_fat_data_struct *adata = NULL;
5174 struct mach_o_fat_header_external hdr;
5175 unsigned long i;
5176
5177 if (bfd_seek (abfd, 0, SEEK_SET) != 0
5178 || bfd_bread (&hdr, sizeof (hdr), abfd) != sizeof (hdr))
5179 goto error;
5180
5181 adata = bfd_alloc (abfd, sizeof (mach_o_fat_data_struct));
5182 if (adata == NULL)
5183 goto error;
5184
5185 adata->magic = bfd_getb32 (hdr.magic);
5186 adata->nfat_arch = bfd_getb32 (hdr.nfat_arch);
5187 if (adata->magic != 0xcafebabe)
5188 goto error;
5189 /* Avoid matching Java bytecode files, which have the same magic number.
5190 In the Java bytecode file format this field contains the JVM version,
5191 which starts at 43.0. */
5192 if (adata->nfat_arch > 30)
5193 goto error;
5194
5195 adata->archentries =
5196 bfd_alloc2 (abfd, adata->nfat_arch, sizeof (mach_o_fat_archentry));
5197 if (adata->archentries == NULL)
5198 goto error;
5199
5200 for (i = 0; i < adata->nfat_arch; i++)
5201 {
5202 struct mach_o_fat_arch_external arch;
5203 if (bfd_bread (&arch, sizeof (arch), abfd) != sizeof (arch))
5204 goto error;
5205 adata->archentries[i].cputype = bfd_getb32 (arch.cputype);
5206 adata->archentries[i].cpusubtype = bfd_getb32 (arch.cpusubtype);
5207 adata->archentries[i].offset = bfd_getb32 (arch.offset);
5208 adata->archentries[i].size = bfd_getb32 (arch.size);
5209 adata->archentries[i].align = bfd_getb32 (arch.align);
5210 }
5211
5212 abfd->tdata.mach_o_fat_data = adata;
5213
5214 return abfd->xvec;
5215
5216 error:
5217 if (adata != NULL)
5218 bfd_release (abfd, adata);
5219 bfd_set_error (bfd_error_wrong_format);
5220 return NULL;
5221 }
5222
5223 /* Set the filename for a fat binary member ABFD, whose bfd architecture is
5224 ARCH_TYPE/ARCH_SUBTYPE and corresponding entry in header is ENTRY.
5225 Set arelt_data and origin fields too. */
5226
5227 static void
5228 bfd_mach_o_fat_member_init (bfd *abfd,
5229 enum bfd_architecture arch_type,
5230 unsigned long arch_subtype,
5231 mach_o_fat_archentry *entry)
5232 {
5233 struct areltdata *areltdata;
5234 /* Create the member filename. Use ARCH_NAME. */
5235 const bfd_arch_info_type *ap = bfd_lookup_arch (arch_type, arch_subtype);
5236
5237 if (ap)
5238 {
5239 /* Use the architecture name if known. */
5240 abfd->filename = xstrdup (ap->printable_name);
5241 }
5242 else
5243 {
5244 /* Forge a uniq id. */
5245 const size_t namelen = 2 + 8 + 1 + 2 + 8 + 1;
5246 char *name = xmalloc (namelen);
5247 snprintf (name, namelen, "0x%lx-0x%lx",
5248 entry->cputype, entry->cpusubtype);
5249 abfd->filename = name;
5250 }
5251
5252 areltdata = bfd_zmalloc (sizeof (struct areltdata));
5253 areltdata->parsed_size = entry->size;
5254 abfd->arelt_data = areltdata;
5255 abfd->iostream = NULL;
5256 abfd->origin = entry->offset;
5257 }
5258
5259 bfd *
5260 bfd_mach_o_fat_openr_next_archived_file (bfd *archive, bfd *prev)
5261 {
5262 mach_o_fat_data_struct *adata;
5263 mach_o_fat_archentry *entry = NULL;
5264 unsigned long i;
5265 bfd *nbfd;
5266 enum bfd_architecture arch_type;
5267 unsigned long arch_subtype;
5268
5269 adata = (mach_o_fat_data_struct *) archive->tdata.mach_o_fat_data;
5270 BFD_ASSERT (adata != NULL);
5271
5272 /* Find index of previous entry. */
5273 if (prev == NULL)
5274 {
5275 /* Start at first one. */
5276 i = 0;
5277 }
5278 else
5279 {
5280 /* Find index of PREV. */
5281 for (i = 0; i < adata->nfat_arch; i++)
5282 {
5283 if (adata->archentries[i].offset == prev->origin)
5284 break;
5285 }
5286
5287 if (i == adata->nfat_arch)
5288 {
5289 /* Not found. */
5290 bfd_set_error (bfd_error_bad_value);
5291 return NULL;
5292 }
5293
5294 /* Get next entry. */
5295 i++;
5296 }
5297
5298 if (i >= adata->nfat_arch)
5299 {
5300 bfd_set_error (bfd_error_no_more_archived_files);
5301 return NULL;
5302 }
5303
5304 entry = &adata->archentries[i];
5305 nbfd = _bfd_new_bfd_contained_in (archive);
5306 if (nbfd == NULL)
5307 return NULL;
5308
5309 bfd_mach_o_convert_architecture (entry->cputype, entry->cpusubtype,
5310 &arch_type, &arch_subtype);
5311
5312 bfd_mach_o_fat_member_init (nbfd, arch_type, arch_subtype, entry);
5313
5314 bfd_set_arch_mach (nbfd, arch_type, arch_subtype);
5315
5316 return nbfd;
5317 }
5318
5319 /* Analogous to stat call. */
5320
5321 static int
5322 bfd_mach_o_fat_stat_arch_elt (bfd *abfd, struct stat *buf)
5323 {
5324 if (abfd->arelt_data == NULL)
5325 {
5326 bfd_set_error (bfd_error_invalid_operation);
5327 return -1;
5328 }
5329
5330 buf->st_mtime = 0;
5331 buf->st_uid = 0;
5332 buf->st_gid = 0;
5333 buf->st_mode = 0644;
5334 buf->st_size = arelt_size (abfd);
5335
5336 return 0;
5337 }
5338
5339 /* If ABFD format is FORMAT and architecture is ARCH, return it.
5340 If ABFD is a fat image containing a member that corresponds to FORMAT
5341 and ARCH, returns it.
5342 In other case, returns NULL.
5343 This function allows transparent uses of fat images. */
5344
5345 bfd *
5346 bfd_mach_o_fat_extract (bfd *abfd,
5347 bfd_format format,
5348 const bfd_arch_info_type *arch)
5349 {
5350 bfd *res;
5351 mach_o_fat_data_struct *adata;
5352 unsigned int i;
5353
5354 if (bfd_check_format (abfd, format))
5355 {
5356 if (bfd_get_arch_info (abfd) == arch)
5357 return abfd;
5358 return NULL;
5359 }
5360 if (!bfd_check_format (abfd, bfd_archive)
5361 || abfd->xvec != &mach_o_fat_vec)
5362 return NULL;
5363
5364 /* This is a Mach-O fat image. */
5365 adata = (mach_o_fat_data_struct *) abfd->tdata.mach_o_fat_data;
5366 BFD_ASSERT (adata != NULL);
5367
5368 for (i = 0; i < adata->nfat_arch; i++)
5369 {
5370 struct mach_o_fat_archentry *e = &adata->archentries[i];
5371 enum bfd_architecture cpu_type;
5372 unsigned long cpu_subtype;
5373
5374 bfd_mach_o_convert_architecture (e->cputype, e->cpusubtype,
5375 &cpu_type, &cpu_subtype);
5376 if (cpu_type != arch->arch || cpu_subtype != arch->mach)
5377 continue;
5378
5379 /* The architecture is found. */
5380 res = _bfd_new_bfd_contained_in (abfd);
5381 if (res == NULL)
5382 return NULL;
5383
5384 bfd_mach_o_fat_member_init (res, cpu_type, cpu_subtype, e);
5385
5386 if (bfd_check_format (res, format))
5387 {
5388 BFD_ASSERT (bfd_get_arch_info (res) == arch);
5389 return res;
5390 }
5391 bfd_close (res);
5392 return NULL;
5393 }
5394
5395 return NULL;
5396 }
5397
5398 int
5399 bfd_mach_o_lookup_command (bfd *abfd,
5400 bfd_mach_o_load_command_type type,
5401 bfd_mach_o_load_command **mcommand)
5402 {
5403 struct mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5404 struct bfd_mach_o_load_command *cmd;
5405 unsigned int num;
5406
5407 BFD_ASSERT (mdata != NULL);
5408 BFD_ASSERT (mcommand != NULL);
5409
5410 num = 0;
5411 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5412 {
5413 if (cmd->type != type)
5414 continue;
5415
5416 if (num == 0)
5417 *mcommand = cmd;
5418 num++;
5419 }
5420
5421 return num;
5422 }
5423
5424 unsigned long
5425 bfd_mach_o_stack_addr (enum bfd_mach_o_cpu_type type)
5426 {
5427 switch (type)
5428 {
5429 case BFD_MACH_O_CPU_TYPE_MC680x0:
5430 return 0x04000000;
5431 case BFD_MACH_O_CPU_TYPE_MC88000:
5432 return 0xffffe000;
5433 case BFD_MACH_O_CPU_TYPE_POWERPC:
5434 return 0xc0000000;
5435 case BFD_MACH_O_CPU_TYPE_I386:
5436 return 0xc0000000;
5437 case BFD_MACH_O_CPU_TYPE_SPARC:
5438 return 0xf0000000;
5439 case BFD_MACH_O_CPU_TYPE_I860:
5440 return 0;
5441 case BFD_MACH_O_CPU_TYPE_HPPA:
5442 return 0xc0000000 - 0x04000000;
5443 default:
5444 return 0;
5445 }
5446 }
5447
5448 /* The following two tables should be kept, as far as possible, in order of
5449 most frequently used entries to optimize their use from gas. */
5450
5451 const bfd_mach_o_xlat_name bfd_mach_o_section_type_name[] =
5452 {
5453 { "regular", BFD_MACH_O_S_REGULAR},
5454 { "coalesced", BFD_MACH_O_S_COALESCED},
5455 { "zerofill", BFD_MACH_O_S_ZEROFILL},
5456 { "cstring_literals", BFD_MACH_O_S_CSTRING_LITERALS},
5457 { "4byte_literals", BFD_MACH_O_S_4BYTE_LITERALS},
5458 { "8byte_literals", BFD_MACH_O_S_8BYTE_LITERALS},
5459 { "16byte_literals", BFD_MACH_O_S_16BYTE_LITERALS},
5460 { "literal_pointers", BFD_MACH_O_S_LITERAL_POINTERS},
5461 { "mod_init_func_pointers", BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS},
5462 { "mod_fini_func_pointers", BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS},
5463 { "gb_zerofill", BFD_MACH_O_S_GB_ZEROFILL},
5464 { "interposing", BFD_MACH_O_S_INTERPOSING},
5465 { "dtrace_dof", BFD_MACH_O_S_DTRACE_DOF},
5466 { "non_lazy_symbol_pointers", BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS},
5467 { "lazy_symbol_pointers", BFD_MACH_O_S_LAZY_SYMBOL_POINTERS},
5468 { "symbol_stubs", BFD_MACH_O_S_SYMBOL_STUBS},
5469 { "lazy_dylib_symbol_pointers", BFD_MACH_O_S_LAZY_DYLIB_SYMBOL_POINTERS},
5470 { NULL, 0}
5471 };
5472
5473 const bfd_mach_o_xlat_name bfd_mach_o_section_attribute_name[] =
5474 {
5475 { "pure_instructions", BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS },
5476 { "some_instructions", BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS },
5477 { "loc_reloc", BFD_MACH_O_S_ATTR_LOC_RELOC },
5478 { "ext_reloc", BFD_MACH_O_S_ATTR_EXT_RELOC },
5479 { "debug", BFD_MACH_O_S_ATTR_DEBUG },
5480 { "live_support", BFD_MACH_O_S_ATTR_LIVE_SUPPORT },
5481 { "no_dead_strip", BFD_MACH_O_S_ATTR_NO_DEAD_STRIP },
5482 { "strip_static_syms", BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS },
5483 { "no_toc", BFD_MACH_O_S_ATTR_NO_TOC },
5484 { "self_modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
5485 { "modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
5486 { NULL, 0}
5487 };
5488
5489 /* Get the section type from NAME. Return 256 if NAME is unknown. */
5490
5491 unsigned int
5492 bfd_mach_o_get_section_type_from_name (bfd *abfd, const char *name)
5493 {
5494 const bfd_mach_o_xlat_name *x;
5495 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
5496
5497 for (x = bfd_mach_o_section_type_name; x->name; x++)
5498 if (strcmp (x->name, name) == 0)
5499 {
5500 /* We found it... does the target support it? */
5501 if (bed->bfd_mach_o_section_type_valid_for_target == NULL
5502 || bed->bfd_mach_o_section_type_valid_for_target (x->val))
5503 return x->val; /* OK. */
5504 else
5505 break; /* Not supported. */
5506 }
5507 /* Maximum section ID = 0xff. */
5508 return 256;
5509 }
5510
5511 /* Get the section attribute from NAME. Return -1 if NAME is unknown. */
5512
5513 unsigned int
5514 bfd_mach_o_get_section_attribute_from_name (const char *name)
5515 {
5516 const bfd_mach_o_xlat_name *x;
5517
5518 for (x = bfd_mach_o_section_attribute_name; x->name; x++)
5519 if (strcmp (x->name, name) == 0)
5520 return x->val;
5521 return (unsigned int)-1;
5522 }
5523
5524 int
5525 bfd_mach_o_core_fetch_environment (bfd *abfd,
5526 unsigned char **rbuf,
5527 unsigned int *rlen)
5528 {
5529 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5530 unsigned long stackaddr = bfd_mach_o_stack_addr (mdata->header.cputype);
5531 bfd_mach_o_load_command *cmd;
5532
5533 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5534 {
5535 bfd_mach_o_segment_command *seg;
5536
5537 if (cmd->type != BFD_MACH_O_LC_SEGMENT)
5538 continue;
5539
5540 seg = &cmd->command.segment;
5541
5542 if ((seg->vmaddr + seg->vmsize) == stackaddr)
5543 {
5544 unsigned long start = seg->fileoff;
5545 unsigned long end = seg->fileoff + seg->filesize;
5546 unsigned char *buf = bfd_malloc (1024);
5547 unsigned long size = 1024;
5548
5549 for (;;)
5550 {
5551 bfd_size_type nread = 0;
5552 unsigned long offset;
5553 int found_nonnull = 0;
5554
5555 if (size > (end - start))
5556 size = (end - start);
5557
5558 buf = bfd_realloc_or_free (buf, size);
5559 if (buf == NULL)
5560 return -1;
5561
5562 if (bfd_seek (abfd, end - size, SEEK_SET) != 0)
5563 {
5564 free (buf);
5565 return -1;
5566 }
5567
5568 nread = bfd_bread (buf, size, abfd);
5569
5570 if (nread != size)
5571 {
5572 free (buf);
5573 return -1;
5574 }
5575
5576 for (offset = 4; offset <= size; offset += 4)
5577 {
5578 unsigned long val;
5579
5580 val = *((unsigned long *) (buf + size - offset));
5581 if (! found_nonnull)
5582 {
5583 if (val != 0)
5584 found_nonnull = 1;
5585 }
5586 else if (val == 0x0)
5587 {
5588 unsigned long bottom;
5589 unsigned long top;
5590
5591 bottom = seg->fileoff + seg->filesize - offset;
5592 top = seg->fileoff + seg->filesize - 4;
5593 *rbuf = bfd_malloc (top - bottom);
5594 *rlen = top - bottom;
5595
5596 memcpy (*rbuf, buf + size - *rlen, *rlen);
5597 free (buf);
5598 return 0;
5599 }
5600 }
5601
5602 if (size == (end - start))
5603 break;
5604
5605 size *= 2;
5606 }
5607
5608 free (buf);
5609 }
5610 }
5611
5612 return -1;
5613 }
5614
5615 char *
5616 bfd_mach_o_core_file_failing_command (bfd *abfd)
5617 {
5618 unsigned char *buf = NULL;
5619 unsigned int len = 0;
5620 int ret;
5621
5622 ret = bfd_mach_o_core_fetch_environment (abfd, &buf, &len);
5623 if (ret < 0)
5624 return NULL;
5625
5626 return (char *) buf;
5627 }
5628
5629 int
5630 bfd_mach_o_core_file_failing_signal (bfd *abfd ATTRIBUTE_UNUSED)
5631 {
5632 return 0;
5633 }
5634
5635 static bfd_mach_o_uuid_command *
5636 bfd_mach_o_lookup_uuid_command (bfd *abfd)
5637 {
5638 bfd_mach_o_load_command *uuid_cmd;
5639 int ncmd = bfd_mach_o_lookup_command (abfd, BFD_MACH_O_LC_UUID, &uuid_cmd);
5640 if (ncmd != 1)
5641 return FALSE;
5642 return &uuid_cmd->command.uuid;
5643 }
5644
5645 /* Return true if ABFD is a dSYM file and its UUID matches UUID_CMD. */
5646
5647 static bfd_boolean
5648 bfd_mach_o_dsym_for_uuid_p (bfd *abfd, const bfd_mach_o_uuid_command *uuid_cmd)
5649 {
5650 bfd_mach_o_uuid_command *dsym_uuid_cmd;
5651
5652 BFD_ASSERT (abfd);
5653 BFD_ASSERT (uuid_cmd);
5654
5655 if (!bfd_check_format (abfd, bfd_object))
5656 return FALSE;
5657
5658 if (bfd_get_flavour (abfd) != bfd_target_mach_o_flavour
5659 || bfd_mach_o_get_data (abfd) == NULL
5660 || bfd_mach_o_get_data (abfd)->header.filetype != BFD_MACH_O_MH_DSYM)
5661 return FALSE;
5662
5663 dsym_uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd);
5664 if (dsym_uuid_cmd == NULL)
5665 return FALSE;
5666
5667 if (memcmp (uuid_cmd->uuid, dsym_uuid_cmd->uuid,
5668 sizeof (uuid_cmd->uuid)) != 0)
5669 return FALSE;
5670
5671 return TRUE;
5672 }
5673
5674 /* Find a BFD in DSYM_FILENAME which matches ARCH and UUID_CMD.
5675 The caller is responsible for closing the returned BFD object and
5676 its my_archive if the returned BFD is in a fat dSYM. */
5677
5678 static bfd *
5679 bfd_mach_o_find_dsym (const char *dsym_filename,
5680 const bfd_mach_o_uuid_command *uuid_cmd,
5681 const bfd_arch_info_type *arch)
5682 {
5683 bfd *base_dsym_bfd, *dsym_bfd;
5684
5685 BFD_ASSERT (uuid_cmd);
5686
5687 base_dsym_bfd = bfd_openr (dsym_filename, NULL);
5688 if (base_dsym_bfd == NULL)
5689 return NULL;
5690
5691 dsym_bfd = bfd_mach_o_fat_extract (base_dsym_bfd, bfd_object, arch);
5692 if (bfd_mach_o_dsym_for_uuid_p (dsym_bfd, uuid_cmd))
5693 return dsym_bfd;
5694
5695 bfd_close (dsym_bfd);
5696 if (base_dsym_bfd != dsym_bfd)
5697 bfd_close (base_dsym_bfd);
5698
5699 return NULL;
5700 }
5701
5702 /* Return a BFD created from a dSYM file for ABFD.
5703 The caller is responsible for closing the returned BFD object, its
5704 filename, and its my_archive if the returned BFD is in a fat dSYM. */
5705
5706 static bfd *
5707 bfd_mach_o_follow_dsym (bfd *abfd)
5708 {
5709 char *dsym_filename;
5710 bfd_mach_o_uuid_command *uuid_cmd;
5711 bfd *dsym_bfd, *base_bfd = abfd;
5712 const char *base_basename;
5713
5714 if (abfd == NULL || bfd_get_flavour (abfd) != bfd_target_mach_o_flavour)
5715 return NULL;
5716
5717 if (abfd->my_archive && !bfd_is_thin_archive (abfd->my_archive))
5718 base_bfd = abfd->my_archive;
5719 /* BFD may have been opened from a stream. */
5720 if (base_bfd->filename == NULL)
5721 {
5722 bfd_set_error (bfd_error_invalid_operation);
5723 return NULL;
5724 }
5725 base_basename = lbasename (base_bfd->filename);
5726
5727 uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd);
5728 if (uuid_cmd == NULL)
5729 return NULL;
5730
5731 /* TODO: We assume the DWARF file has the same as the binary's.
5732 It seems apple's GDB checks all files in the dSYM bundle directory.
5733 http://opensource.apple.com/source/gdb/gdb-1708/src/gdb/macosx/macosx-tdep.c
5734 */
5735 dsym_filename = (char *)bfd_malloc (strlen (base_bfd->filename)
5736 + strlen (dsym_subdir) + 1
5737 + strlen (base_basename) + 1);
5738 sprintf (dsym_filename, "%s%s/%s",
5739 base_bfd->filename, dsym_subdir, base_basename);
5740
5741 dsym_bfd = bfd_mach_o_find_dsym (dsym_filename, uuid_cmd,
5742 bfd_get_arch_info (abfd));
5743 if (dsym_bfd == NULL)
5744 free (dsym_filename);
5745
5746 return dsym_bfd;
5747 }
5748
5749 bfd_boolean
5750 bfd_mach_o_find_nearest_line (bfd *abfd,
5751 asymbol **symbols,
5752 asection *section,
5753 bfd_vma offset,
5754 const char **filename_ptr,
5755 const char **functionname_ptr,
5756 unsigned int *line_ptr,
5757 unsigned int *discriminator_ptr)
5758 {
5759 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5760 if (mdata == NULL)
5761 return FALSE;
5762 switch (mdata->header.filetype)
5763 {
5764 case BFD_MACH_O_MH_OBJECT:
5765 break;
5766 case BFD_MACH_O_MH_EXECUTE:
5767 case BFD_MACH_O_MH_DYLIB:
5768 case BFD_MACH_O_MH_BUNDLE:
5769 case BFD_MACH_O_MH_KEXT_BUNDLE:
5770 if (mdata->dwarf2_find_line_info == NULL)
5771 {
5772 mdata->dsym_bfd = bfd_mach_o_follow_dsym (abfd);
5773 /* When we couldn't find dSYM for this binary, we look for
5774 the debug information in the binary itself. In this way,
5775 we won't try finding separated dSYM again because
5776 mdata->dwarf2_find_line_info will be filled. */
5777 if (! mdata->dsym_bfd)
5778 break;
5779 if (! _bfd_dwarf2_slurp_debug_info (abfd, mdata->dsym_bfd,
5780 dwarf_debug_sections, symbols,
5781 &mdata->dwarf2_find_line_info,
5782 FALSE))
5783 return FALSE;
5784 }
5785 break;
5786 default:
5787 return FALSE;
5788 }
5789 return _bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset,
5790 filename_ptr, functionname_ptr,
5791 line_ptr, discriminator_ptr,
5792 dwarf_debug_sections, 0,
5793 &mdata->dwarf2_find_line_info);
5794 }
5795
5796 bfd_boolean
5797 bfd_mach_o_close_and_cleanup (bfd *abfd)
5798 {
5799 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5800 if (bfd_get_format (abfd) == bfd_object && mdata != NULL)
5801 {
5802 _bfd_dwarf2_cleanup_debug_info (abfd, &mdata->dwarf2_find_line_info);
5803 bfd_mach_o_free_cached_info (abfd);
5804 if (mdata->dsym_bfd != NULL)
5805 {
5806 bfd *fat_bfd = mdata->dsym_bfd->my_archive;
5807 #if 0
5808 /* FIXME: PR 19435: This calculation to find the memory allocated by
5809 bfd_mach_o_follow_dsym for the filename does not always end up
5810 selecting the correct pointer. Unfortunately this problem is
5811 very hard to reproduce on a non Mach-O native system, so until it
5812 can be traced and fixed on such a system, this code will remain
5813 commented out. This does mean that there will be a memory leak,
5814 but it is small, and happens when we are closing down, so it
5815 should not matter too much. */
5816 char *dsym_filename = (char *)(fat_bfd
5817 ? fat_bfd->filename
5818 : mdata->dsym_bfd->filename);
5819 #endif
5820 bfd_close (mdata->dsym_bfd);
5821 mdata->dsym_bfd = NULL;
5822 if (fat_bfd)
5823 bfd_close (fat_bfd);
5824 #if 0
5825 free (dsym_filename);
5826 #endif
5827 }
5828 }
5829
5830 return _bfd_generic_close_and_cleanup (abfd);
5831 }
5832
5833 bfd_boolean bfd_mach_o_free_cached_info (bfd *abfd)
5834 {
5835 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5836 asection *asect;
5837 free (mdata->dyn_reloc_cache);
5838 mdata->dyn_reloc_cache = NULL;
5839 for (asect = abfd->sections; asect != NULL; asect = asect->next)
5840 {
5841 free (asect->relocation);
5842 asect->relocation = NULL;
5843 }
5844
5845 return TRUE;
5846 }
5847
5848 #define bfd_mach_o_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
5849 #define bfd_mach_o_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_lookup
5850
5851 #define bfd_mach_o_canonicalize_one_reloc NULL
5852 #define bfd_mach_o_swap_reloc_out NULL
5853 #define bfd_mach_o_print_thread NULL
5854 #define bfd_mach_o_tgt_seg_table NULL
5855 #define bfd_mach_o_section_type_valid_for_tgt NULL
5856
5857 #define TARGET_NAME mach_o_be_vec
5858 #define TARGET_STRING "mach-o-be"
5859 #define TARGET_ARCHITECTURE bfd_arch_unknown
5860 #define TARGET_PAGESIZE 1
5861 #define TARGET_BIG_ENDIAN 1
5862 #define TARGET_ARCHIVE 0
5863 #define TARGET_PRIORITY 1
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
5873
5874 #define TARGET_NAME mach_o_le_vec
5875 #define TARGET_STRING "mach-o-le"
5876 #define TARGET_ARCHITECTURE bfd_arch_unknown
5877 #define TARGET_PAGESIZE 1
5878 #define TARGET_BIG_ENDIAN 0
5879 #define TARGET_ARCHIVE 0
5880 #define TARGET_PRIORITY 1
5881
5882 #include "mach-o-target.c"
5883
5884 #undef TARGET_NAME
5885 #undef TARGET_STRING
5886 #undef TARGET_ARCHITECTURE
5887 #undef TARGET_PAGESIZE
5888 #undef TARGET_BIG_ENDIAN
5889 #undef TARGET_ARCHIVE
5890 #undef TARGET_PRIORITY
5891
5892 /* Not yet handled: creating an archive. */
5893 #define bfd_mach_o_mkarchive _bfd_noarchive_mkarchive
5894
5895 #define bfd_mach_o_close_and_cleanup bfd_true
5896
5897 /* Not used. */
5898 #define bfd_mach_o_generic_stat_arch_elt bfd_mach_o_fat_stat_arch_elt
5899 #define bfd_mach_o_openr_next_archived_file bfd_mach_o_fat_openr_next_archived_file
5900 #define bfd_mach_o_archive_p bfd_mach_o_fat_archive_p
5901
5902 #define TARGET_NAME mach_o_fat_vec
5903 #define TARGET_STRING "mach-o-fat"
5904 #define TARGET_ARCHITECTURE bfd_arch_unknown
5905 #define TARGET_PAGESIZE 1
5906 #define TARGET_BIG_ENDIAN 1
5907 #define TARGET_ARCHIVE 1
5908 #define TARGET_PRIORITY 0
5909
5910 #include "mach-o-target.c"
5911
5912 #undef TARGET_NAME
5913 #undef TARGET_STRING
5914 #undef TARGET_ARCHITECTURE
5915 #undef TARGET_PAGESIZE
5916 #undef TARGET_BIG_ENDIAN
5917 #undef TARGET_ARCHIVE
5918 #undef TARGET_PRIORITY
GDB Binutils - Deliverables
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