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