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Fix PR backtrace/15558
[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 unsigned int
41 bfd_mach_o_version (bfd *abfd)
42 {
43 bfd_mach_o_data_struct *mdata = NULL;
44
45 BFD_ASSERT (bfd_mach_o_valid (abfd));
46 mdata = bfd_mach_o_get_data (abfd);
47
48 return mdata->header.version;
49 }
50
51 bfd_boolean
52 bfd_mach_o_valid (bfd *abfd)
53 {
54 if (abfd == NULL || abfd->xvec == NULL)
55 return FALSE;
56
57 if (abfd->xvec->flavour != bfd_target_mach_o_flavour)
58 return FALSE;
59
60 if (bfd_mach_o_get_data (abfd) == NULL)
61 return FALSE;
62 return TRUE;
63 }
64
65 static INLINE bfd_boolean
66 mach_o_wide_p (bfd_mach_o_header *header)
67 {
68 switch (header->version)
69 {
70 case 1:
71 return FALSE;
72 case 2:
73 return TRUE;
74 default:
75 BFD_FAIL ();
76 return FALSE;
77 }
78 }
79
80 static INLINE bfd_boolean
81 bfd_mach_o_wide_p (bfd *abfd)
82 {
83 return mach_o_wide_p (&bfd_mach_o_get_data (abfd)->header);
84 }
85
86 /* Tables to translate well known Mach-O segment/section names to bfd
87 names. Use of canonical names (such as .text or .debug_frame) is required
88 by gdb. */
89
90 /* __TEXT Segment. */
91 static const mach_o_section_name_xlat text_section_names_xlat[] =
92 {
93 { ".text", "__text",
94 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR,
95 BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS, 0},
96 { ".const", "__const",
97 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
98 BFD_MACH_O_S_ATTR_NONE, 0},
99 { ".static_const", "__static_const",
100 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
101 BFD_MACH_O_S_ATTR_NONE, 0},
102 { ".cstring", "__cstring",
103 SEC_READONLY | SEC_DATA | SEC_LOAD | SEC_MERGE | SEC_STRINGS,
104 BFD_MACH_O_S_CSTRING_LITERALS,
105 BFD_MACH_O_S_ATTR_NONE, 0},
106 { ".literal4", "__literal4",
107 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_4BYTE_LITERALS,
108 BFD_MACH_O_S_ATTR_NONE, 2},
109 { ".literal8", "__literal8",
110 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_8BYTE_LITERALS,
111 BFD_MACH_O_S_ATTR_NONE, 3},
112 { ".literal16", "__literal16",
113 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_16BYTE_LITERALS,
114 BFD_MACH_O_S_ATTR_NONE, 4},
115 { ".constructor", "__constructor",
116 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR,
117 BFD_MACH_O_S_ATTR_NONE, 0},
118 { ".destructor", "__destructor",
119 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR,
120 BFD_MACH_O_S_ATTR_NONE, 0},
121 { ".eh_frame", "__eh_frame",
122 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_COALESCED,
123 BFD_MACH_O_S_ATTR_LIVE_SUPPORT
124 | BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS
125 | BFD_MACH_O_S_ATTR_NO_TOC, 2},
126 { NULL, NULL, 0, 0, 0, 0}
127 };
128
129 /* __DATA Segment. */
130 static const mach_o_section_name_xlat data_section_names_xlat[] =
131 {
132 { ".data", "__data",
133 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
134 BFD_MACH_O_S_ATTR_NONE, 0},
135 { ".bss", "__bss",
136 SEC_NO_FLAGS, BFD_MACH_O_S_ZEROFILL,
137 BFD_MACH_O_S_ATTR_NONE, 0},
138 { ".const_data", "__const",
139 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
140 BFD_MACH_O_S_ATTR_NONE, 0},
141 { ".static_data", "__static_data",
142 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
143 BFD_MACH_O_S_ATTR_NONE, 0},
144 { ".mod_init_func", "__mod_init_func",
145 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS,
146 BFD_MACH_O_S_ATTR_NONE, 2},
147 { ".mod_term_func", "__mod_term_func",
148 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS,
149 BFD_MACH_O_S_ATTR_NONE, 2},
150 { ".dyld", "__dyld",
151 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
152 BFD_MACH_O_S_ATTR_NONE, 0},
153 { ".cfstring", "__cfstring",
154 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
155 BFD_MACH_O_S_ATTR_NONE, 2},
156 { NULL, NULL, 0, 0, 0, 0}
157 };
158
159 /* __DWARF Segment. */
160 static const mach_o_section_name_xlat dwarf_section_names_xlat[] =
161 {
162 { ".debug_frame", "__debug_frame",
163 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
164 BFD_MACH_O_S_ATTR_DEBUG, 0},
165 { ".debug_info", "__debug_info",
166 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
167 BFD_MACH_O_S_ATTR_DEBUG, 0},
168 { ".debug_abbrev", "__debug_abbrev",
169 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
170 BFD_MACH_O_S_ATTR_DEBUG, 0},
171 { ".debug_aranges", "__debug_aranges",
172 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
173 BFD_MACH_O_S_ATTR_DEBUG, 0},
174 { ".debug_macinfo", "__debug_macinfo",
175 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
176 BFD_MACH_O_S_ATTR_DEBUG, 0},
177 { ".debug_line", "__debug_line",
178 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
179 BFD_MACH_O_S_ATTR_DEBUG, 0},
180 { ".debug_loc", "__debug_loc",
181 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
182 BFD_MACH_O_S_ATTR_DEBUG, 0},
183 { ".debug_pubnames", "__debug_pubnames",
184 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
185 BFD_MACH_O_S_ATTR_DEBUG, 0},
186 { ".debug_pubtypes", "__debug_pubtypes",
187 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
188 BFD_MACH_O_S_ATTR_DEBUG, 0},
189 { ".debug_str", "__debug_str",
190 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
191 BFD_MACH_O_S_ATTR_DEBUG, 0},
192 { ".debug_ranges", "__debug_ranges",
193 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
194 BFD_MACH_O_S_ATTR_DEBUG, 0},
195 { ".debug_macro", "__debug_macro",
196 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
197 BFD_MACH_O_S_ATTR_DEBUG, 0},
198 { ".debug_gdb_scripts", "__debug_gdb_scri",
199 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
200 BFD_MACH_O_S_ATTR_DEBUG, 0},
201 { NULL, NULL, 0, 0, 0, 0}
202 };
203
204 /* __OBJC Segment. */
205 static const mach_o_section_name_xlat objc_section_names_xlat[] =
206 {
207 { ".objc_class", "__class",
208 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
209 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
210 { ".objc_meta_class", "__meta_class",
211 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
212 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
213 { ".objc_cat_cls_meth", "__cat_cls_meth",
214 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
215 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
216 { ".objc_cat_inst_meth", "__cat_inst_meth",
217 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
218 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
219 { ".objc_protocol", "__protocol",
220 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
221 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
222 { ".objc_string_object", "__string_object",
223 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
224 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
225 { ".objc_cls_meth", "__cls_meth",
226 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
227 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
228 { ".objc_inst_meth", "__inst_meth",
229 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
230 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
231 { ".objc_cls_refs", "__cls_refs",
232 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LITERAL_POINTERS,
233 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
234 { ".objc_message_refs", "__message_refs",
235 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LITERAL_POINTERS,
236 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
237 { ".objc_symbols", "__symbols",
238 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
239 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
240 { ".objc_category", "__category",
241 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
242 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
243 { ".objc_class_vars", "__class_vars",
244 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
245 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
246 { ".objc_instance_vars", "__instance_vars",
247 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
248 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
249 { ".objc_module_info", "__module_info",
250 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
251 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
252 { ".objc_selector_strs", "__selector_strs",
253 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_CSTRING_LITERALS,
254 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
255 { ".objc_image_info", "__image_info",
256 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
257 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
258 { ".objc_selector_fixup", "__sel_fixup",
259 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
260 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
261 /* Objc V1 */
262 { ".objc1_class_ext", "__class_ext",
263 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
264 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
265 { ".objc1_property_list", "__property",
266 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
267 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
268 { ".objc1_protocol_ext", "__protocol_ext",
269 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
270 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
271 { NULL, NULL, 0, 0, 0, 0}
272 };
273
274 static const mach_o_segment_name_xlat segsec_names_xlat[] =
275 {
276 { "__TEXT", text_section_names_xlat },
277 { "__DATA", data_section_names_xlat },
278 { "__DWARF", dwarf_section_names_xlat },
279 { "__OBJC", objc_section_names_xlat },
280 { NULL, NULL }
281 };
282
283 static const char dsym_subdir[] = ".dSYM/Contents/Resources/DWARF";
284
285 /* For both cases bfd-name => mach-o name and vice versa, the specific target
286 is checked before the generic. This allows a target (e.g. ppc for cstring)
287 to override the generic definition with a more specific one. */
288
289 /* Fetch the translation from a Mach-O section designation (segment, section)
290 as a bfd short name, if one exists. Otherwise return NULL.
291
292 Allow the segment and section names to be unterminated 16 byte arrays. */
293
294 const mach_o_section_name_xlat *
295 bfd_mach_o_section_data_for_mach_sect (bfd *abfd, const char *segname,
296 const char *sectname)
297 {
298 const struct mach_o_segment_name_xlat *seg;
299 const mach_o_section_name_xlat *sec;
300 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
301
302 /* First try any target-specific translations defined... */
303 if (bed->segsec_names_xlat)
304 for (seg = bed->segsec_names_xlat; seg->segname; seg++)
305 if (strncmp (seg->segname, segname, BFD_MACH_O_SEGNAME_SIZE) == 0)
306 for (sec = seg->sections; sec->mach_o_name; sec++)
307 if (strncmp (sec->mach_o_name, sectname,
308 BFD_MACH_O_SECTNAME_SIZE) == 0)
309 return sec;
310
311 /* ... and then the Mach-O generic ones. */
312 for (seg = segsec_names_xlat; seg->segname; seg++)
313 if (strncmp (seg->segname, segname, BFD_MACH_O_SEGNAME_SIZE) == 0)
314 for (sec = seg->sections; sec->mach_o_name; sec++)
315 if (strncmp (sec->mach_o_name, sectname,
316 BFD_MACH_O_SECTNAME_SIZE) == 0)
317 return sec;
318
319 return NULL;
320 }
321
322 /* If the bfd_name for this section is a 'canonical' form for which we
323 know the Mach-O data, return the segment name and the data for the
324 Mach-O equivalent. Otherwise return NULL. */
325
326 const mach_o_section_name_xlat *
327 bfd_mach_o_section_data_for_bfd_name (bfd *abfd, const char *bfd_name,
328 const char **segname)
329 {
330 const struct mach_o_segment_name_xlat *seg;
331 const mach_o_section_name_xlat *sec;
332 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
333 *segname = NULL;
334
335 if (bfd_name[0] != '.')
336 return NULL;
337
338 /* First try any target-specific translations defined... */
339 if (bed->segsec_names_xlat)
340 for (seg = bed->segsec_names_xlat; seg->segname; seg++)
341 for (sec = seg->sections; sec->bfd_name; sec++)
342 if (strcmp (bfd_name, sec->bfd_name) == 0)
343 {
344 *segname = seg->segname;
345 return sec;
346 }
347
348 /* ... and then the Mach-O generic ones. */
349 for (seg = segsec_names_xlat; seg->segname; seg++)
350 for (sec = seg->sections; sec->bfd_name; sec++)
351 if (strcmp (bfd_name, sec->bfd_name) == 0)
352 {
353 *segname = seg->segname;
354 return sec;
355 }
356
357 return NULL;
358 }
359
360 /* Convert Mach-O section name to BFD.
361
362 Try to use standard/canonical names, for which we have tables including
363 default flag settings - which are returned. Otherwise forge a new name
364 in the form "<segmentname>.<sectionname>" this will be prefixed with
365 LC_SEGMENT. if the segment name does not begin with an underscore.
366
367 SEGNAME and SECTNAME are 16 byte arrays (they do not need to be NUL-
368 terminated if the name length is exactly 16 bytes - but must be if the name
369 length is less than 16 characters). */
370
371 void
372 bfd_mach_o_convert_section_name_to_bfd (bfd *abfd, const char *segname,
373 const char *secname, const char **name,
374 flagword *flags)
375 {
376 const mach_o_section_name_xlat *xlat;
377 char *res;
378 unsigned int len;
379 const char *pfx = "";
380
381 *name = NULL;
382 *flags = SEC_NO_FLAGS;
383
384 /* First search for a canonical name...
385 xlat will be non-null if there is an entry for segname, secname. */
386 xlat = bfd_mach_o_section_data_for_mach_sect (abfd, segname, secname);
387 if (xlat)
388 {
389 len = strlen (xlat->bfd_name);
390 res = bfd_alloc (abfd, len+1);
391 if (res == NULL)
392 return;
393 memcpy (res, xlat->bfd_name, len+1);
394 *name = res;
395 *flags = xlat->bfd_flags;
396 return;
397 }
398
399 /* ... else we make up a bfd name from the segment concatenated with the
400 section. */
401
402 len = 16 + 1 + 16 + 1;
403
404 /* Put "LC_SEGMENT." prefix if the segment name is weird (ie doesn't start
405 with an underscore. */
406 if (segname[0] != '_')
407 {
408 static const char seg_pfx[] = "LC_SEGMENT.";
409
410 pfx = seg_pfx;
411 len += sizeof (seg_pfx) - 1;
412 }
413
414 res = bfd_alloc (abfd, len);
415 if (res == NULL)
416 return;
417 snprintf (res, len, "%s%.16s.%.16s", pfx, segname, secname);
418 *name = res;
419 }
420
421 /* Convert a bfd section name to a Mach-O segment + section name.
422
423 If the name is a canonical one for which we have a Darwin match
424 return the translation table - which contains defaults for flags,
425 type, attribute and default alignment data.
426
427 Otherwise, expand the bfd_name (assumed to be in the form
428 "[LC_SEGMENT.]<segmentname>.<sectionname>") and return NULL. */
429
430 static const mach_o_section_name_xlat *
431 bfd_mach_o_convert_section_name_to_mach_o (bfd *abfd ATTRIBUTE_UNUSED,
432 asection *sect,
433 bfd_mach_o_section *section)
434 {
435 const mach_o_section_name_xlat *xlat;
436 const char *name = bfd_get_section_name (abfd, sect);
437 const char *segname;
438 const char *dot;
439 unsigned int len;
440 unsigned int seglen;
441 unsigned int seclen;
442
443 memset (section->segname, 0, BFD_MACH_O_SEGNAME_SIZE + 1);
444 memset (section->sectname, 0, BFD_MACH_O_SECTNAME_SIZE + 1);
445
446 /* See if is a canonical name ... */
447 xlat = bfd_mach_o_section_data_for_bfd_name (abfd, name, &segname);
448 if (xlat)
449 {
450 strcpy (section->segname, segname);
451 strcpy (section->sectname, xlat->mach_o_name);
452 return xlat;
453 }
454
455 /* .. else we convert our constructed one back to Mach-O.
456 Strip LC_SEGMENT. prefix, if present. */
457 if (strncmp (name, "LC_SEGMENT.", 11) == 0)
458 name += 11;
459
460 /* Find a dot. */
461 dot = strchr (name, '.');
462 len = strlen (name);
463
464 /* Try to split name into segment and section names. */
465 if (dot && dot != name)
466 {
467 seglen = dot - name;
468 seclen = len - (dot + 1 - name);
469
470 if (seglen <= BFD_MACH_O_SEGNAME_SIZE
471 && seclen <= BFD_MACH_O_SECTNAME_SIZE)
472 {
473 memcpy (section->segname, name, seglen);
474 section->segname[seglen] = 0;
475 memcpy (section->sectname, dot + 1, seclen);
476 section->sectname[seclen] = 0;
477 return NULL;
478 }
479 }
480
481 /* The segment and section names are both missing - don't make them
482 into dots. */
483 if (dot && dot == name)
484 return NULL;
485
486 /* Just duplicate the name into both segment and section. */
487 if (len > 16)
488 len = 16;
489 memcpy (section->segname, name, len);
490 section->segname[len] = 0;
491 memcpy (section->sectname, name, len);
492 section->sectname[len] = 0;
493 return NULL;
494 }
495
496 /* Return the size of an entry for section SEC.
497 Must be called only for symbol pointer section and symbol stubs
498 sections. */
499
500 unsigned int
501 bfd_mach_o_section_get_entry_size (bfd *abfd, bfd_mach_o_section *sec)
502 {
503 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
504 {
505 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
506 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
507 return bfd_mach_o_wide_p (abfd) ? 8 : 4;
508 case BFD_MACH_O_S_SYMBOL_STUBS:
509 return sec->reserved2;
510 default:
511 BFD_FAIL ();
512 return 0;
513 }
514 }
515
516 /* Return the number of indirect symbols for a section.
517 Must be called only for symbol pointer section and symbol stubs
518 sections. */
519
520 unsigned int
521 bfd_mach_o_section_get_nbr_indirect (bfd *abfd, bfd_mach_o_section *sec)
522 {
523 unsigned int elsz;
524
525 elsz = bfd_mach_o_section_get_entry_size (abfd, sec);
526 if (elsz == 0)
527 return 0;
528 else
529 return sec->size / elsz;
530 }
531
532
533 /* Copy any private info we understand from the input symbol
534 to the output symbol. */
535
536 bfd_boolean
537 bfd_mach_o_bfd_copy_private_symbol_data (bfd *ibfd ATTRIBUTE_UNUSED,
538 asymbol *isymbol,
539 bfd *obfd ATTRIBUTE_UNUSED,
540 asymbol *osymbol)
541 {
542 bfd_mach_o_asymbol *os, *is;
543 os = (bfd_mach_o_asymbol *)osymbol;
544 is = (bfd_mach_o_asymbol *)isymbol;
545 os->n_type = is->n_type;
546 os->n_sect = is->n_sect;
547 os->n_desc = is->n_desc;
548 os->symbol.udata.i = is->symbol.udata.i;
549 return TRUE;
550 }
551
552 /* Copy any private info we understand from the input section
553 to the output section. */
554
555 bfd_boolean
556 bfd_mach_o_bfd_copy_private_section_data (bfd *ibfd ATTRIBUTE_UNUSED,
557 asection *isection,
558 bfd *obfd ATTRIBUTE_UNUSED,
559 asection *osection)
560 {
561 if (osection->used_by_bfd == NULL)
562 osection->used_by_bfd = isection->used_by_bfd;
563 else
564 if (isection->used_by_bfd != NULL)
565 memcpy (osection->used_by_bfd, isection->used_by_bfd,
566 sizeof (bfd_mach_o_section));
567
568 if (osection->used_by_bfd != NULL)
569 ((bfd_mach_o_section *)osection->used_by_bfd)->bfdsection = osection;
570
571 return TRUE;
572 }
573
574 /* Copy any private info we understand from the input bfd
575 to the output bfd. */
576
577 bfd_boolean
578 bfd_mach_o_bfd_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
579 {
580 if (bfd_get_flavour (ibfd) != bfd_target_mach_o_flavour
581 || bfd_get_flavour (obfd) != bfd_target_mach_o_flavour)
582 return TRUE;
583
584 BFD_ASSERT (bfd_mach_o_valid (ibfd));
585 BFD_ASSERT (bfd_mach_o_valid (obfd));
586
587 /* FIXME: copy commands. */
588
589 return TRUE;
590 }
591
592 /* This allows us to set up to 32 bits of flags (unless we invent some
593 fiendish scheme to subdivide). For now, we'll just set the file flags
594 without error checking - just overwrite. */
595
596 bfd_boolean
597 bfd_mach_o_bfd_set_private_flags (bfd *abfd, flagword flags)
598 {
599 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
600
601 if (!mdata)
602 return FALSE;
603
604 mdata->header.flags = flags;
605 return TRUE;
606 }
607
608 /* Count the total number of symbols. */
609
610 static long
611 bfd_mach_o_count_symbols (bfd *abfd)
612 {
613 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
614
615 if (mdata->symtab == NULL)
616 return 0;
617 return mdata->symtab->nsyms;
618 }
619
620 long
621 bfd_mach_o_get_symtab_upper_bound (bfd *abfd)
622 {
623 long nsyms = bfd_mach_o_count_symbols (abfd);
624
625 return ((nsyms + 1) * sizeof (asymbol *));
626 }
627
628 long
629 bfd_mach_o_canonicalize_symtab (bfd *abfd, asymbol **alocation)
630 {
631 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
632 long nsyms = bfd_mach_o_count_symbols (abfd);
633 bfd_mach_o_symtab_command *sym = mdata->symtab;
634 unsigned long j;
635
636 if (nsyms < 0)
637 return nsyms;
638
639 if (nsyms == 0)
640 {
641 /* Do not try to read symbols if there are none. */
642 alocation[0] = NULL;
643 return 0;
644 }
645
646 if (!bfd_mach_o_read_symtab_symbols (abfd))
647 {
648 (*_bfd_error_handler)
649 (_("bfd_mach_o_canonicalize_symtab: unable to load symbols"));
650 return 0;
651 }
652
653 BFD_ASSERT (sym->symbols != NULL);
654
655 for (j = 0; j < sym->nsyms; j++)
656 alocation[j] = &sym->symbols[j].symbol;
657
658 alocation[j] = NULL;
659
660 return nsyms;
661 }
662
663 /* Create synthetic symbols for indirect symbols. */
664
665 long
666 bfd_mach_o_get_synthetic_symtab (bfd *abfd,
667 long symcount ATTRIBUTE_UNUSED,
668 asymbol **syms ATTRIBUTE_UNUSED,
669 long dynsymcount ATTRIBUTE_UNUSED,
670 asymbol **dynsyms ATTRIBUTE_UNUSED,
671 asymbol **ret)
672 {
673 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
674 bfd_mach_o_dysymtab_command *dysymtab = mdata->dysymtab;
675 bfd_mach_o_symtab_command *symtab = mdata->symtab;
676 asymbol *s;
677 unsigned long count, i, j, n;
678 size_t size;
679 char *names;
680 char *nul_name;
681
682 *ret = NULL;
683
684 /* Stop now if no symbols or no indirect symbols. */
685 if (dysymtab == NULL || symtab == NULL || symtab->symbols == NULL)
686 return 0;
687
688 if (dysymtab->nindirectsyms == 0)
689 return 0;
690
691 /* We need to allocate a bfd symbol for every indirect symbol and to
692 allocate the memory for its name. */
693 count = dysymtab->nindirectsyms;
694 size = count * sizeof (asymbol) + 1;
695
696 for (j = 0; j < count; j++)
697 {
698 unsigned int isym = dysymtab->indirect_syms[j];
699
700 /* Some indirect symbols are anonymous. */
701 if (isym < symtab->nsyms && symtab->symbols[isym].symbol.name)
702 size += strlen (symtab->symbols[isym].symbol.name) + sizeof ("$stub");
703 }
704
705 s = *ret = (asymbol *) bfd_malloc (size);
706 if (s == NULL)
707 return -1;
708 names = (char *) (s + count);
709 nul_name = names;
710 *names++ = 0;
711
712 n = 0;
713 for (i = 0; i < mdata->nsects; i++)
714 {
715 bfd_mach_o_section *sec = mdata->sections[i];
716 unsigned int first, last;
717 bfd_vma addr;
718 bfd_vma entry_size;
719
720 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
721 {
722 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
723 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
724 case BFD_MACH_O_S_SYMBOL_STUBS:
725 /* Only these sections have indirect symbols. */
726 first = sec->reserved1;
727 last = first + bfd_mach_o_section_get_nbr_indirect (abfd, sec);
728 addr = sec->addr;
729 entry_size = bfd_mach_o_section_get_entry_size (abfd, sec);
730 for (j = first; j < last; j++)
731 {
732 unsigned int isym = dysymtab->indirect_syms[j];
733
734 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
735 s->section = sec->bfdsection;
736 s->value = addr - sec->addr;
737 s->udata.p = NULL;
738
739 if (isym < symtab->nsyms
740 && symtab->symbols[isym].symbol.name)
741 {
742 const char *sym = symtab->symbols[isym].symbol.name;
743 size_t len;
744
745 s->name = names;
746 len = strlen (sym);
747 memcpy (names, sym, len);
748 names += len;
749 memcpy (names, "$stub", sizeof ("$stub"));
750 names += sizeof ("$stub");
751 }
752 else
753 s->name = nul_name;
754
755 addr += entry_size;
756 s++;
757 n++;
758 }
759 break;
760 default:
761 break;
762 }
763 }
764
765 return n;
766 }
767
768 void
769 bfd_mach_o_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
770 asymbol *symbol,
771 symbol_info *ret)
772 {
773 bfd_symbol_info (symbol, ret);
774 }
775
776 void
777 bfd_mach_o_print_symbol (bfd *abfd,
778 void * afile,
779 asymbol *symbol,
780 bfd_print_symbol_type how)
781 {
782 FILE *file = (FILE *) afile;
783 const char *name;
784 bfd_mach_o_asymbol *asym = (bfd_mach_o_asymbol *)symbol;
785
786 switch (how)
787 {
788 case bfd_print_symbol_name:
789 fprintf (file, "%s", symbol->name);
790 break;
791 default:
792 bfd_print_symbol_vandf (abfd, (void *) file, symbol);
793 if (asym->n_type & BFD_MACH_O_N_STAB)
794 name = bfd_get_stab_name (asym->n_type);
795 else
796 switch (asym->n_type & BFD_MACH_O_N_TYPE)
797 {
798 case BFD_MACH_O_N_UNDF:
799 if (symbol->value == 0)
800 name = "UND";
801 else
802 name = "COM";
803 break;
804 case BFD_MACH_O_N_ABS:
805 name = "ABS";
806 break;
807 case BFD_MACH_O_N_INDR:
808 name = "INDR";
809 break;
810 case BFD_MACH_O_N_PBUD:
811 name = "PBUD";
812 break;
813 case BFD_MACH_O_N_SECT:
814 name = "SECT";
815 break;
816 default:
817 name = "???";
818 break;
819 }
820 if (name == NULL)
821 name = "";
822 fprintf (file, " %02x %-6s %02x %04x",
823 asym->n_type, name, asym->n_sect, asym->n_desc);
824 if ((asym->n_type & BFD_MACH_O_N_STAB) == 0
825 && (asym->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_SECT)
826 fprintf (file, " [%s]", symbol->section->name);
827 fprintf (file, " %s", symbol->name);
828 }
829 }
830
831 static void
832 bfd_mach_o_convert_architecture (bfd_mach_o_cpu_type mtype,
833 bfd_mach_o_cpu_subtype msubtype,
834 enum bfd_architecture *type,
835 unsigned long *subtype)
836 {
837 *subtype = bfd_arch_unknown;
838
839 switch (mtype)
840 {
841 case BFD_MACH_O_CPU_TYPE_VAX:
842 *type = bfd_arch_vax;
843 break;
844 case BFD_MACH_O_CPU_TYPE_MC680x0:
845 *type = bfd_arch_m68k;
846 break;
847 case BFD_MACH_O_CPU_TYPE_I386:
848 *type = bfd_arch_i386;
849 *subtype = bfd_mach_i386_i386;
850 break;
851 case BFD_MACH_O_CPU_TYPE_X86_64:
852 *type = bfd_arch_i386;
853 *subtype = bfd_mach_x86_64;
854 break;
855 case BFD_MACH_O_CPU_TYPE_MIPS:
856 *type = bfd_arch_mips;
857 break;
858 case BFD_MACH_O_CPU_TYPE_MC98000:
859 *type = bfd_arch_m98k;
860 break;
861 case BFD_MACH_O_CPU_TYPE_HPPA:
862 *type = bfd_arch_hppa;
863 break;
864 case BFD_MACH_O_CPU_TYPE_ARM:
865 *type = bfd_arch_arm;
866 switch (msubtype)
867 {
868 case BFD_MACH_O_CPU_SUBTYPE_ARM_V4T:
869 *subtype = bfd_mach_arm_4T;
870 break;
871 case BFD_MACH_O_CPU_SUBTYPE_ARM_V6:
872 *subtype = bfd_mach_arm_4T; /* Best fit ? */
873 break;
874 case BFD_MACH_O_CPU_SUBTYPE_ARM_V5TEJ:
875 *subtype = bfd_mach_arm_5TE;
876 break;
877 case BFD_MACH_O_CPU_SUBTYPE_ARM_XSCALE:
878 *subtype = bfd_mach_arm_XScale;
879 break;
880 case BFD_MACH_O_CPU_SUBTYPE_ARM_V7:
881 *subtype = bfd_mach_arm_5TE; /* Best fit ? */
882 break;
883 case BFD_MACH_O_CPU_SUBTYPE_ARM_ALL:
884 default:
885 break;
886 }
887 break;
888 case BFD_MACH_O_CPU_TYPE_MC88000:
889 *type = bfd_arch_m88k;
890 break;
891 case BFD_MACH_O_CPU_TYPE_SPARC:
892 *type = bfd_arch_sparc;
893 *subtype = bfd_mach_sparc;
894 break;
895 case BFD_MACH_O_CPU_TYPE_I860:
896 *type = bfd_arch_i860;
897 break;
898 case BFD_MACH_O_CPU_TYPE_ALPHA:
899 *type = bfd_arch_alpha;
900 break;
901 case BFD_MACH_O_CPU_TYPE_POWERPC:
902 *type = bfd_arch_powerpc;
903 *subtype = bfd_mach_ppc;
904 break;
905 case BFD_MACH_O_CPU_TYPE_POWERPC_64:
906 *type = bfd_arch_powerpc;
907 *subtype = bfd_mach_ppc64;
908 break;
909 case BFD_MACH_O_CPU_TYPE_ARM64:
910 *type = bfd_arch_aarch64;
911 *subtype = bfd_mach_aarch64;
912 break;
913 default:
914 *type = bfd_arch_unknown;
915 break;
916 }
917 }
918
919 static bfd_boolean
920 bfd_mach_o_write_header (bfd *abfd, bfd_mach_o_header *header)
921 {
922 struct mach_o_header_external raw;
923 unsigned int size;
924
925 size = mach_o_wide_p (header) ?
926 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
927
928 bfd_h_put_32 (abfd, header->magic, raw.magic);
929 bfd_h_put_32 (abfd, header->cputype, raw.cputype);
930 bfd_h_put_32 (abfd, header->cpusubtype, raw.cpusubtype);
931 bfd_h_put_32 (abfd, header->filetype, raw.filetype);
932 bfd_h_put_32 (abfd, header->ncmds, raw.ncmds);
933 bfd_h_put_32 (abfd, header->sizeofcmds, raw.sizeofcmds);
934 bfd_h_put_32 (abfd, header->flags, raw.flags);
935
936 if (mach_o_wide_p (header))
937 bfd_h_put_32 (abfd, header->reserved, raw.reserved);
938
939 if (bfd_seek (abfd, 0, SEEK_SET) != 0
940 || bfd_bwrite (&raw, size, abfd) != size)
941 return FALSE;
942
943 return TRUE;
944 }
945
946 static bfd_boolean
947 bfd_mach_o_write_thread (bfd *abfd, bfd_mach_o_load_command *command)
948 {
949 bfd_mach_o_thread_command *cmd = &command->command.thread;
950 unsigned int i;
951 struct mach_o_thread_command_external raw;
952 unsigned int offset;
953
954 BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD)
955 || (command->type == BFD_MACH_O_LC_UNIXTHREAD));
956
957 offset = 8;
958 for (i = 0; i < cmd->nflavours; i++)
959 {
960 BFD_ASSERT ((cmd->flavours[i].size % 4) == 0);
961 BFD_ASSERT (cmd->flavours[i].offset ==
962 (command->offset + offset + BFD_MACH_O_LC_SIZE));
963
964 bfd_h_put_32 (abfd, cmd->flavours[i].flavour, raw.flavour);
965 bfd_h_put_32 (abfd, (cmd->flavours[i].size / 4), raw.count);
966
967 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
968 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
969 return FALSE;
970
971 offset += cmd->flavours[i].size + sizeof (raw);
972 }
973
974 return TRUE;
975 }
976
977 long
978 bfd_mach_o_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
979 asection *asect)
980 {
981 return (asect->reloc_count + 1) * sizeof (arelent *);
982 }
983
984 /* In addition to the need to byte-swap the symbol number, the bit positions
985 of the fields in the relocation information vary per target endian-ness. */
986
987 static void
988 bfd_mach_o_swap_in_non_scattered_reloc (bfd *abfd, bfd_mach_o_reloc_info *rel,
989 unsigned char *fields)
990 {
991 unsigned char info = fields[3];
992
993 if (bfd_big_endian (abfd))
994 {
995 rel->r_value = (fields[0] << 16) | (fields[1] << 8) | fields[2];
996 rel->r_type = (info >> BFD_MACH_O_BE_TYPE_SHIFT) & BFD_MACH_O_TYPE_MASK;
997 rel->r_pcrel = (info & BFD_MACH_O_BE_PCREL) ? 1 : 0;
998 rel->r_length = (info >> BFD_MACH_O_BE_LENGTH_SHIFT)
999 & BFD_MACH_O_LENGTH_MASK;
1000 rel->r_extern = (info & BFD_MACH_O_BE_EXTERN) ? 1 : 0;
1001 }
1002 else
1003 {
1004 rel->r_value = (fields[2] << 16) | (fields[1] << 8) | fields[0];
1005 rel->r_type = (info >> BFD_MACH_O_LE_TYPE_SHIFT) & BFD_MACH_O_TYPE_MASK;
1006 rel->r_pcrel = (info & BFD_MACH_O_LE_PCREL) ? 1 : 0;
1007 rel->r_length = (info >> BFD_MACH_O_LE_LENGTH_SHIFT)
1008 & BFD_MACH_O_LENGTH_MASK;
1009 rel->r_extern = (info & BFD_MACH_O_LE_EXTERN) ? 1 : 0;
1010 }
1011 }
1012
1013 static int
1014 bfd_mach_o_canonicalize_one_reloc (bfd *abfd,
1015 struct mach_o_reloc_info_external *raw,
1016 arelent *res, asymbol **syms)
1017 {
1018 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1019 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1020 bfd_mach_o_reloc_info reloc;
1021 bfd_vma addr;
1022 asymbol **sym;
1023
1024 addr = bfd_get_32 (abfd, raw->r_address);
1025 res->sym_ptr_ptr = NULL;
1026 res->addend = 0;
1027
1028 if (addr & BFD_MACH_O_SR_SCATTERED)
1029 {
1030 unsigned int j;
1031 bfd_vma symnum = bfd_get_32 (abfd, raw->r_symbolnum);
1032
1033 /* Scattered relocation, can't be extern. */
1034 reloc.r_scattered = 1;
1035 reloc.r_extern = 0;
1036
1037 /* Extract section and offset from r_value (symnum). */
1038 reloc.r_value = symnum;
1039 /* FIXME: This breaks when a symbol in a reloc exactly follows the
1040 end of the data for the section (e.g. in a calculation of section
1041 data length). At present, the symbol will end up associated with
1042 the following section or, if it falls within alignment padding, as
1043 null - which will assert later. */
1044 for (j = 0; j < mdata->nsects; j++)
1045 {
1046 bfd_mach_o_section *sect = mdata->sections[j];
1047 if (symnum >= sect->addr && symnum < sect->addr + sect->size)
1048 {
1049 res->sym_ptr_ptr = sect->bfdsection->symbol_ptr_ptr;
1050 res->addend = symnum - sect->addr;
1051 break;
1052 }
1053 }
1054
1055 /* Extract the info and address fields from r_address. */
1056 reloc.r_type = BFD_MACH_O_GET_SR_TYPE (addr);
1057 reloc.r_length = BFD_MACH_O_GET_SR_LENGTH (addr);
1058 reloc.r_pcrel = addr & BFD_MACH_O_SR_PCREL;
1059 reloc.r_address = BFD_MACH_O_GET_SR_TYPE (addr);
1060 res->address = BFD_MACH_O_GET_SR_ADDRESS (addr);
1061 }
1062 else
1063 {
1064 unsigned int num;
1065
1066 /* Non-scattered relocation. */
1067 reloc.r_scattered = 0;
1068
1069 /* The value and info fields have to be extracted dependent on target
1070 endian-ness. */
1071 bfd_mach_o_swap_in_non_scattered_reloc (abfd, &reloc, raw->r_symbolnum);
1072 num = reloc.r_value;
1073
1074 if (reloc.r_extern)
1075 {
1076 /* An external symbol number. */
1077 sym = syms + num;
1078 }
1079 else if (num == 0x00ffffff || num == 0)
1080 {
1081 /* The 'symnum' in a non-scattered PAIR is 0x00ffffff. But as this
1082 is generic code, we don't know wether this is really a PAIR.
1083 This value is almost certainly not a valid section number, hence
1084 this specific case to avoid an assertion failure.
1085 Target specific swap_reloc_in routine should adjust that. */
1086 sym = bfd_abs_section_ptr->symbol_ptr_ptr;
1087 }
1088 else
1089 {
1090 /* A section number. */
1091 BFD_ASSERT (num <= mdata->nsects);
1092
1093 sym = mdata->sections[num - 1]->bfdsection->symbol_ptr_ptr;
1094 /* For a symbol defined in section S, the addend (stored in the
1095 binary) contains the address of the section. To comply with
1096 bfd convention, subtract the section address.
1097 Use the address from the header, so that the user can modify
1098 the vma of the section. */
1099 res->addend = -mdata->sections[num - 1]->addr;
1100 }
1101 /* Note: Pairs for PPC LO/HI/HA are not scattered, but contain the offset
1102 in the lower 16bits of the address value. So we have to find the
1103 'symbol' from the preceding reloc. We do this even though the
1104 section symbol is probably not needed here, because NULL symbol
1105 values cause an assert in generic BFD code. This must be done in
1106 the PPC swap_reloc_in routine. */
1107 res->sym_ptr_ptr = sym;
1108
1109 /* The 'address' is just r_address.
1110 ??? maybe this should be masked with 0xffffff for safety. */
1111 res->address = addr;
1112 reloc.r_address = addr;
1113 }
1114
1115 /* We have set up a reloc with all the information present, so the swapper
1116 can modify address, value and addend fields, if necessary, to convey
1117 information in the generic BFD reloc that is mach-o specific. */
1118
1119 if (!(*bed->_bfd_mach_o_swap_reloc_in)(res, &reloc))
1120 return -1;
1121 return 0;
1122 }
1123
1124 static int
1125 bfd_mach_o_canonicalize_relocs (bfd *abfd, unsigned long filepos,
1126 unsigned long count,
1127 arelent *res, asymbol **syms)
1128 {
1129 unsigned long i;
1130 struct mach_o_reloc_info_external *native_relocs;
1131 bfd_size_type native_size;
1132
1133 /* Allocate and read relocs. */
1134 native_size = count * BFD_MACH_O_RELENT_SIZE;
1135 native_relocs =
1136 (struct mach_o_reloc_info_external *) bfd_malloc (native_size);
1137 if (native_relocs == NULL)
1138 return -1;
1139
1140 if (bfd_seek (abfd, filepos, SEEK_SET) != 0
1141 || bfd_bread (native_relocs, native_size, abfd) != native_size)
1142 goto err;
1143
1144 for (i = 0; i < count; i++)
1145 {
1146 if (bfd_mach_o_canonicalize_one_reloc (abfd, &native_relocs[i],
1147 &res[i], syms) < 0)
1148 goto err;
1149 }
1150 free (native_relocs);
1151 return i;
1152 err:
1153 free (native_relocs);
1154 return -1;
1155 }
1156
1157 long
1158 bfd_mach_o_canonicalize_reloc (bfd *abfd, asection *asect,
1159 arelent **rels, asymbol **syms)
1160 {
1161 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1162 unsigned long i;
1163 arelent *res;
1164
1165 if (asect->reloc_count == 0)
1166 return 0;
1167
1168 /* No need to go further if we don't know how to read relocs. */
1169 if (bed->_bfd_mach_o_swap_reloc_in == NULL)
1170 return 0;
1171
1172 if (asect->relocation == NULL)
1173 {
1174 res = bfd_malloc (asect->reloc_count * sizeof (arelent));
1175 if (res == NULL)
1176 return -1;
1177
1178 if (bfd_mach_o_canonicalize_relocs (abfd, asect->rel_filepos,
1179 asect->reloc_count, res, syms) < 0)
1180 {
1181 free (res);
1182 return -1;
1183 }
1184 asect->relocation = res;
1185 }
1186
1187 res = asect->relocation;
1188 for (i = 0; i < asect->reloc_count; i++)
1189 rels[i] = &res[i];
1190 rels[i] = NULL;
1191
1192 return i;
1193 }
1194
1195 long
1196 bfd_mach_o_get_dynamic_reloc_upper_bound (bfd *abfd)
1197 {
1198 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1199
1200 if (mdata->dysymtab == NULL)
1201 return 1;
1202 return (mdata->dysymtab->nextrel + mdata->dysymtab->nlocrel + 1)
1203 * sizeof (arelent *);
1204 }
1205
1206 long
1207 bfd_mach_o_canonicalize_dynamic_reloc (bfd *abfd, arelent **rels,
1208 struct bfd_symbol **syms)
1209 {
1210 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1211 bfd_mach_o_dysymtab_command *dysymtab = mdata->dysymtab;
1212 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1213 unsigned long i;
1214 arelent *res;
1215
1216 if (dysymtab == NULL)
1217 return 0;
1218 if (dysymtab->nextrel == 0 && dysymtab->nlocrel == 0)
1219 return 0;
1220
1221 /* No need to go further if we don't know how to read relocs. */
1222 if (bed->_bfd_mach_o_swap_reloc_in == NULL)
1223 return 0;
1224
1225 if (mdata->dyn_reloc_cache == NULL)
1226 {
1227 res = bfd_malloc ((dysymtab->nextrel + dysymtab->nlocrel)
1228 * sizeof (arelent));
1229 if (res == NULL)
1230 return -1;
1231
1232 if (bfd_mach_o_canonicalize_relocs (abfd, dysymtab->extreloff,
1233 dysymtab->nextrel, res, syms) < 0)
1234 {
1235 free (res);
1236 return -1;
1237 }
1238
1239 if (bfd_mach_o_canonicalize_relocs (abfd, dysymtab->locreloff,
1240 dysymtab->nlocrel,
1241 res + dysymtab->nextrel, syms) < 0)
1242 {
1243 free (res);
1244 return -1;
1245 }
1246
1247 mdata->dyn_reloc_cache = res;
1248 }
1249
1250 res = mdata->dyn_reloc_cache;
1251 for (i = 0; i < dysymtab->nextrel + dysymtab->nlocrel; i++)
1252 rels[i] = &res[i];
1253 rels[i] = NULL;
1254 return i;
1255 }
1256
1257 /* In addition to the need to byte-swap the symbol number, the bit positions
1258 of the fields in the relocation information vary per target endian-ness. */
1259
1260 static void
1261 bfd_mach_o_swap_out_non_scattered_reloc (bfd *abfd, unsigned char *fields,
1262 bfd_mach_o_reloc_info *rel)
1263 {
1264 unsigned char info = 0;
1265
1266 BFD_ASSERT (rel->r_type <= 15);
1267 BFD_ASSERT (rel->r_length <= 3);
1268
1269 if (bfd_big_endian (abfd))
1270 {
1271 fields[0] = (rel->r_value >> 16) & 0xff;
1272 fields[1] = (rel->r_value >> 8) & 0xff;
1273 fields[2] = rel->r_value & 0xff;
1274 info |= rel->r_type << BFD_MACH_O_BE_TYPE_SHIFT;
1275 info |= rel->r_pcrel ? BFD_MACH_O_BE_PCREL : 0;
1276 info |= rel->r_length << BFD_MACH_O_BE_LENGTH_SHIFT;
1277 info |= rel->r_extern ? BFD_MACH_O_BE_EXTERN : 0;
1278 }
1279 else
1280 {
1281 fields[2] = (rel->r_value >> 16) & 0xff;
1282 fields[1] = (rel->r_value >> 8) & 0xff;
1283 fields[0] = rel->r_value & 0xff;
1284 info |= rel->r_type << BFD_MACH_O_LE_TYPE_SHIFT;
1285 info |= rel->r_pcrel ? BFD_MACH_O_LE_PCREL : 0;
1286 info |= rel->r_length << BFD_MACH_O_LE_LENGTH_SHIFT;
1287 info |= rel->r_extern ? BFD_MACH_O_LE_EXTERN : 0;
1288 }
1289 fields[3] = info;
1290 }
1291
1292 static bfd_boolean
1293 bfd_mach_o_write_relocs (bfd *abfd, bfd_mach_o_section *section)
1294 {
1295 unsigned int i;
1296 arelent **entries;
1297 asection *sec;
1298 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1299
1300 sec = section->bfdsection;
1301 if (sec->reloc_count == 0)
1302 return TRUE;
1303
1304 if (bed->_bfd_mach_o_swap_reloc_out == NULL)
1305 return TRUE;
1306
1307 if (bfd_seek (abfd, section->reloff, SEEK_SET) != 0)
1308 return FALSE;
1309
1310 /* Convert and write. */
1311 entries = section->bfdsection->orelocation;
1312 for (i = 0; i < section->nreloc; i++)
1313 {
1314 arelent *rel = entries[i];
1315 struct mach_o_reloc_info_external raw;
1316 bfd_mach_o_reloc_info info, *pinfo = &info;
1317
1318 /* Convert relocation to an intermediate representation. */
1319 if (!(*bed->_bfd_mach_o_swap_reloc_out) (rel, pinfo))
1320 return FALSE;
1321
1322 /* Lower the relocation info. */
1323 if (pinfo->r_scattered)
1324 {
1325 unsigned long v;
1326
1327 v = BFD_MACH_O_SR_SCATTERED
1328 | (pinfo->r_pcrel ? BFD_MACH_O_SR_PCREL : 0)
1329 | BFD_MACH_O_SET_SR_LENGTH (pinfo->r_length)
1330 | BFD_MACH_O_SET_SR_TYPE (pinfo->r_type)
1331 | BFD_MACH_O_SET_SR_ADDRESS (pinfo->r_address);
1332 /* Note: scattered relocs have field in reverse order... */
1333 bfd_put_32 (abfd, v, raw.r_address);
1334 bfd_put_32 (abfd, pinfo->r_value, raw.r_symbolnum);
1335 }
1336 else
1337 {
1338 bfd_put_32 (abfd, pinfo->r_address, raw.r_address);
1339 bfd_mach_o_swap_out_non_scattered_reloc (abfd, raw.r_symbolnum,
1340 pinfo);
1341 }
1342
1343 if (bfd_bwrite (&raw, BFD_MACH_O_RELENT_SIZE, abfd)
1344 != BFD_MACH_O_RELENT_SIZE)
1345 return FALSE;
1346 }
1347 return TRUE;
1348 }
1349
1350 static bfd_boolean
1351 bfd_mach_o_write_section_32 (bfd *abfd, bfd_mach_o_section *section)
1352 {
1353 struct mach_o_section_32_external raw;
1354
1355 memcpy (raw.sectname, section->sectname, 16);
1356 memcpy (raw.segname, section->segname, 16);
1357 bfd_h_put_32 (abfd, section->addr, raw.addr);
1358 bfd_h_put_32 (abfd, section->size, raw.size);
1359 bfd_h_put_32 (abfd, section->offset, raw.offset);
1360 bfd_h_put_32 (abfd, section->align, raw.align);
1361 bfd_h_put_32 (abfd, section->reloff, raw.reloff);
1362 bfd_h_put_32 (abfd, section->nreloc, raw.nreloc);
1363 bfd_h_put_32 (abfd, section->flags, raw.flags);
1364 bfd_h_put_32 (abfd, section->reserved1, raw.reserved1);
1365 bfd_h_put_32 (abfd, section->reserved2, raw.reserved2);
1366
1367 if (bfd_bwrite (&raw, BFD_MACH_O_SECTION_SIZE, abfd)
1368 != BFD_MACH_O_SECTION_SIZE)
1369 return FALSE;
1370
1371 return TRUE;
1372 }
1373
1374 static bfd_boolean
1375 bfd_mach_o_write_section_64 (bfd *abfd, bfd_mach_o_section *section)
1376 {
1377 struct mach_o_section_64_external raw;
1378
1379 memcpy (raw.sectname, section->sectname, 16);
1380 memcpy (raw.segname, section->segname, 16);
1381 bfd_h_put_64 (abfd, section->addr, raw.addr);
1382 bfd_h_put_64 (abfd, section->size, raw.size);
1383 bfd_h_put_32 (abfd, section->offset, raw.offset);
1384 bfd_h_put_32 (abfd, section->align, raw.align);
1385 bfd_h_put_32 (abfd, section->reloff, raw.reloff);
1386 bfd_h_put_32 (abfd, section->nreloc, raw.nreloc);
1387 bfd_h_put_32 (abfd, section->flags, raw.flags);
1388 bfd_h_put_32 (abfd, section->reserved1, raw.reserved1);
1389 bfd_h_put_32 (abfd, section->reserved2, raw.reserved2);
1390 bfd_h_put_32 (abfd, section->reserved3, raw.reserved3);
1391
1392 if (bfd_bwrite (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd)
1393 != BFD_MACH_O_SECTION_64_SIZE)
1394 return FALSE;
1395
1396 return TRUE;
1397 }
1398
1399 static bfd_boolean
1400 bfd_mach_o_write_segment_32 (bfd *abfd, bfd_mach_o_load_command *command)
1401 {
1402 struct mach_o_segment_command_32_external raw;
1403 bfd_mach_o_segment_command *seg = &command->command.segment;
1404 bfd_mach_o_section *sec;
1405
1406 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT);
1407
1408 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1409 if (!bfd_mach_o_write_relocs (abfd, sec))
1410 return FALSE;
1411
1412 memcpy (raw.segname, seg->segname, 16);
1413 bfd_h_put_32 (abfd, seg->vmaddr, raw.vmaddr);
1414 bfd_h_put_32 (abfd, seg->vmsize, raw.vmsize);
1415 bfd_h_put_32 (abfd, seg->fileoff, raw.fileoff);
1416 bfd_h_put_32 (abfd, seg->filesize, raw.filesize);
1417 bfd_h_put_32 (abfd, seg->maxprot, raw.maxprot);
1418 bfd_h_put_32 (abfd, seg->initprot, raw.initprot);
1419 bfd_h_put_32 (abfd, seg->nsects, raw.nsects);
1420 bfd_h_put_32 (abfd, seg->flags, raw.flags);
1421
1422 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1423 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1424 return FALSE;
1425
1426 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1427 if (!bfd_mach_o_write_section_32 (abfd, sec))
1428 return FALSE;
1429
1430 return TRUE;
1431 }
1432
1433 static bfd_boolean
1434 bfd_mach_o_write_segment_64 (bfd *abfd, bfd_mach_o_load_command *command)
1435 {
1436 struct mach_o_segment_command_64_external raw;
1437 bfd_mach_o_segment_command *seg = &command->command.segment;
1438 bfd_mach_o_section *sec;
1439
1440 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64);
1441
1442 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1443 if (!bfd_mach_o_write_relocs (abfd, sec))
1444 return FALSE;
1445
1446 memcpy (raw.segname, seg->segname, 16);
1447 bfd_h_put_64 (abfd, seg->vmaddr, raw.vmaddr);
1448 bfd_h_put_64 (abfd, seg->vmsize, raw.vmsize);
1449 bfd_h_put_64 (abfd, seg->fileoff, raw.fileoff);
1450 bfd_h_put_64 (abfd, seg->filesize, raw.filesize);
1451 bfd_h_put_32 (abfd, seg->maxprot, raw.maxprot);
1452 bfd_h_put_32 (abfd, seg->initprot, raw.initprot);
1453 bfd_h_put_32 (abfd, seg->nsects, raw.nsects);
1454 bfd_h_put_32 (abfd, seg->flags, raw.flags);
1455
1456 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1457 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1458 return FALSE;
1459
1460 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1461 if (!bfd_mach_o_write_section_64 (abfd, sec))
1462 return FALSE;
1463
1464 return TRUE;
1465 }
1466
1467 static bfd_boolean
1468 bfd_mach_o_write_symtab (bfd *abfd, bfd_mach_o_load_command *command)
1469 {
1470 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1471 bfd_mach_o_symtab_command *sym = &command->command.symtab;
1472 unsigned long i;
1473 unsigned int wide = bfd_mach_o_wide_p (abfd);
1474 unsigned int symlen = wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE;
1475 struct bfd_strtab_hash *strtab;
1476 asymbol **symbols = bfd_get_outsymbols (abfd);
1477
1478 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB);
1479
1480 /* Write the symbols first. */
1481 mdata->filelen = FILE_ALIGN (mdata->filelen, wide ? 3 : 2);
1482 sym->symoff = mdata->filelen;
1483 if (bfd_seek (abfd, sym->symoff, SEEK_SET) != 0)
1484 return FALSE;
1485
1486 sym->nsyms = bfd_get_symcount (abfd);
1487 mdata->filelen += sym->nsyms * symlen;
1488
1489 strtab = _bfd_stringtab_init ();
1490 if (strtab == NULL)
1491 return FALSE;
1492
1493 if (sym->nsyms > 0)
1494 /* Although we don't strictly need to do this, for compatibility with
1495 Darwin system tools, actually output an empty string for the index
1496 0 entry. */
1497 _bfd_stringtab_add (strtab, "", TRUE, FALSE);
1498
1499 for (i = 0; i < sym->nsyms; i++)
1500 {
1501 bfd_size_type str_index;
1502 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
1503
1504 if (s->symbol.name == 0 || s->symbol.name[0] == '\0')
1505 /* An index of 0 always means the empty string. */
1506 str_index = 0;
1507 else
1508 {
1509 str_index = _bfd_stringtab_add (strtab, s->symbol.name, TRUE, FALSE);
1510
1511 if (str_index == (bfd_size_type) -1)
1512 goto err;
1513 }
1514
1515 if (wide)
1516 {
1517 struct mach_o_nlist_64_external raw;
1518
1519 bfd_h_put_32 (abfd, str_index, raw.n_strx);
1520 bfd_h_put_8 (abfd, s->n_type, raw.n_type);
1521 bfd_h_put_8 (abfd, s->n_sect, raw.n_sect);
1522 bfd_h_put_16 (abfd, s->n_desc, raw.n_desc);
1523 bfd_h_put_64 (abfd, s->symbol.section->vma + s->symbol.value,
1524 raw.n_value);
1525
1526 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1527 goto err;
1528 }
1529 else
1530 {
1531 struct mach_o_nlist_external raw;
1532
1533 bfd_h_put_32 (abfd, str_index, raw.n_strx);
1534 bfd_h_put_8 (abfd, s->n_type, raw.n_type);
1535 bfd_h_put_8 (abfd, s->n_sect, raw.n_sect);
1536 bfd_h_put_16 (abfd, s->n_desc, raw.n_desc);
1537 bfd_h_put_32 (abfd, s->symbol.section->vma + s->symbol.value,
1538 raw.n_value);
1539
1540 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1541 goto err;
1542 }
1543 }
1544 sym->strsize = _bfd_stringtab_size (strtab);
1545 sym->stroff = mdata->filelen;
1546 mdata->filelen += sym->strsize;
1547
1548 if (_bfd_stringtab_emit (abfd, strtab) != TRUE)
1549 goto err;
1550 _bfd_stringtab_free (strtab);
1551
1552 /* The command. */
1553 {
1554 struct mach_o_symtab_command_external raw;
1555
1556 bfd_h_put_32 (abfd, sym->symoff, raw.symoff);
1557 bfd_h_put_32 (abfd, sym->nsyms, raw.nsyms);
1558 bfd_h_put_32 (abfd, sym->stroff, raw.stroff);
1559 bfd_h_put_32 (abfd, sym->strsize, raw.strsize);
1560
1561 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1562 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1563 return FALSE;
1564 }
1565
1566 return TRUE;
1567
1568 err:
1569 _bfd_stringtab_free (strtab);
1570 return FALSE;
1571 }
1572
1573 /* Write a dysymtab command.
1574 TODO: Possibly coalesce writes of smaller objects. */
1575
1576 static bfd_boolean
1577 bfd_mach_o_write_dysymtab (bfd *abfd, bfd_mach_o_load_command *command)
1578 {
1579 bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab;
1580
1581 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB);
1582
1583 if (cmd->nmodtab != 0)
1584 {
1585 unsigned int i;
1586
1587 if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0)
1588 return FALSE;
1589
1590 for (i = 0; i < cmd->nmodtab; i++)
1591 {
1592 bfd_mach_o_dylib_module *module = &cmd->dylib_module[i];
1593 unsigned int iinit;
1594 unsigned int ninit;
1595
1596 iinit = module->iinit & 0xffff;
1597 iinit |= ((module->iterm & 0xffff) << 16);
1598
1599 ninit = module->ninit & 0xffff;
1600 ninit |= ((module->nterm & 0xffff) << 16);
1601
1602 if (bfd_mach_o_wide_p (abfd))
1603 {
1604 struct mach_o_dylib_module_64_external w;
1605
1606 bfd_h_put_32 (abfd, module->module_name_idx, &w.module_name);
1607 bfd_h_put_32 (abfd, module->iextdefsym, &w.iextdefsym);
1608 bfd_h_put_32 (abfd, module->nextdefsym, &w.nextdefsym);
1609 bfd_h_put_32 (abfd, module->irefsym, &w.irefsym);
1610 bfd_h_put_32 (abfd, module->nrefsym, &w.nrefsym);
1611 bfd_h_put_32 (abfd, module->ilocalsym, &w.ilocalsym);
1612 bfd_h_put_32 (abfd, module->nlocalsym, &w.nlocalsym);
1613 bfd_h_put_32 (abfd, module->iextrel, &w.iextrel);
1614 bfd_h_put_32 (abfd, module->nextrel, &w.nextrel);
1615 bfd_h_put_32 (abfd, iinit, &w.iinit_iterm);
1616 bfd_h_put_32 (abfd, ninit, &w.ninit_nterm);
1617 bfd_h_put_64 (abfd, module->objc_module_info_addr,
1618 &w.objc_module_info_addr);
1619 bfd_h_put_32 (abfd, module->objc_module_info_size,
1620 &w.objc_module_info_size);
1621
1622 if (bfd_bwrite ((void *) &w, sizeof (w), abfd) != sizeof (w))
1623 return FALSE;
1624 }
1625 else
1626 {
1627 struct mach_o_dylib_module_external n;
1628
1629 bfd_h_put_32 (abfd, module->module_name_idx, &n.module_name);
1630 bfd_h_put_32 (abfd, module->iextdefsym, &n.iextdefsym);
1631 bfd_h_put_32 (abfd, module->nextdefsym, &n.nextdefsym);
1632 bfd_h_put_32 (abfd, module->irefsym, &n.irefsym);
1633 bfd_h_put_32 (abfd, module->nrefsym, &n.nrefsym);
1634 bfd_h_put_32 (abfd, module->ilocalsym, &n.ilocalsym);
1635 bfd_h_put_32 (abfd, module->nlocalsym, &n.nlocalsym);
1636 bfd_h_put_32 (abfd, module->iextrel, &n.iextrel);
1637 bfd_h_put_32 (abfd, module->nextrel, &n.nextrel);
1638 bfd_h_put_32 (abfd, iinit, &n.iinit_iterm);
1639 bfd_h_put_32 (abfd, ninit, &n.ninit_nterm);
1640 bfd_h_put_32 (abfd, module->objc_module_info_addr,
1641 &n.objc_module_info_addr);
1642 bfd_h_put_32 (abfd, module->objc_module_info_size,
1643 &n.objc_module_info_size);
1644
1645 if (bfd_bwrite ((void *) &n, sizeof (n), abfd) != sizeof (n))
1646 return FALSE;
1647 }
1648 }
1649 }
1650
1651 if (cmd->ntoc != 0)
1652 {
1653 unsigned int i;
1654
1655 if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0)
1656 return FALSE;
1657
1658 for (i = 0; i < cmd->ntoc; i++)
1659 {
1660 struct mach_o_dylib_table_of_contents_external raw;
1661 bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i];
1662
1663 bfd_h_put_32 (abfd, toc->symbol_index, &raw.symbol_index);
1664 bfd_h_put_32 (abfd, toc->module_index, &raw.module_index);
1665
1666 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1667 return FALSE;
1668 }
1669 }
1670
1671 if (cmd->nindirectsyms > 0)
1672 {
1673 unsigned int i;
1674
1675 if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0)
1676 return FALSE;
1677
1678 for (i = 0; i < cmd->nindirectsyms; ++i)
1679 {
1680 unsigned char raw[4];
1681
1682 bfd_h_put_32 (abfd, cmd->indirect_syms[i], &raw);
1683 if (bfd_bwrite (raw, sizeof (raw), abfd) != sizeof (raw))
1684 return FALSE;
1685 }
1686 }
1687
1688 if (cmd->nextrefsyms != 0)
1689 {
1690 unsigned int i;
1691
1692 if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0)
1693 return FALSE;
1694
1695 for (i = 0; i < cmd->nextrefsyms; i++)
1696 {
1697 unsigned long v;
1698 unsigned char raw[4];
1699 bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i];
1700
1701 /* Fields isym and flags are written as bit-fields, thus we need
1702 a specific processing for endianness. */
1703
1704 if (bfd_big_endian (abfd))
1705 {
1706 v = ((ref->isym & 0xffffff) << 8);
1707 v |= ref->flags & 0xff;
1708 }
1709 else
1710 {
1711 v = ref->isym & 0xffffff;
1712 v |= ((ref->flags & 0xff) << 24);
1713 }
1714
1715 bfd_h_put_32 (abfd, v, raw);
1716 if (bfd_bwrite (raw, sizeof (raw), abfd) != sizeof (raw))
1717 return FALSE;
1718 }
1719 }
1720
1721 /* The command. */
1722 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0)
1723 return FALSE;
1724 else
1725 {
1726 struct mach_o_dysymtab_command_external raw;
1727
1728 bfd_h_put_32 (abfd, cmd->ilocalsym, &raw.ilocalsym);
1729 bfd_h_put_32 (abfd, cmd->nlocalsym, &raw.nlocalsym);
1730 bfd_h_put_32 (abfd, cmd->iextdefsym, &raw.iextdefsym);
1731 bfd_h_put_32 (abfd, cmd->nextdefsym, &raw.nextdefsym);
1732 bfd_h_put_32 (abfd, cmd->iundefsym, &raw.iundefsym);
1733 bfd_h_put_32 (abfd, cmd->nundefsym, &raw.nundefsym);
1734 bfd_h_put_32 (abfd, cmd->tocoff, &raw.tocoff);
1735 bfd_h_put_32 (abfd, cmd->ntoc, &raw.ntoc);
1736 bfd_h_put_32 (abfd, cmd->modtaboff, &raw.modtaboff);
1737 bfd_h_put_32 (abfd, cmd->nmodtab, &raw.nmodtab);
1738 bfd_h_put_32 (abfd, cmd->extrefsymoff, &raw.extrefsymoff);
1739 bfd_h_put_32 (abfd, cmd->nextrefsyms, &raw.nextrefsyms);
1740 bfd_h_put_32 (abfd, cmd->indirectsymoff, &raw.indirectsymoff);
1741 bfd_h_put_32 (abfd, cmd->nindirectsyms, &raw.nindirectsyms);
1742 bfd_h_put_32 (abfd, cmd->extreloff, &raw.extreloff);
1743 bfd_h_put_32 (abfd, cmd->nextrel, &raw.nextrel);
1744 bfd_h_put_32 (abfd, cmd->locreloff, &raw.locreloff);
1745 bfd_h_put_32 (abfd, cmd->nlocrel, &raw.nlocrel);
1746
1747 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1748 return FALSE;
1749 }
1750
1751 return TRUE;
1752 }
1753
1754 static unsigned
1755 bfd_mach_o_primary_symbol_sort_key (bfd_mach_o_asymbol *s)
1756 {
1757 unsigned mtyp = s->n_type & BFD_MACH_O_N_TYPE;
1758
1759 /* Just leave debug symbols where they are (pretend they are local, and
1760 then they will just be sorted on position). */
1761 if (s->n_type & BFD_MACH_O_N_STAB)
1762 return 0;
1763
1764 /* Local (we should never see an undefined local AFAICT). */
1765 if (! (s->n_type & (BFD_MACH_O_N_EXT | BFD_MACH_O_N_PEXT)))
1766 return 0;
1767
1768 /* Common symbols look like undefined externs. */
1769 if (mtyp == BFD_MACH_O_N_UNDF)
1770 return 2;
1771
1772 /* A defined non-local, non-debug symbol. */
1773 return 1;
1774 }
1775
1776 static int
1777 bfd_mach_o_cf_symbols (const void *a, const void *b)
1778 {
1779 bfd_mach_o_asymbol *sa = *(bfd_mach_o_asymbol **) a;
1780 bfd_mach_o_asymbol *sb = *(bfd_mach_o_asymbol **) b;
1781 unsigned int soa, sob;
1782
1783 soa = bfd_mach_o_primary_symbol_sort_key (sa);
1784 sob = bfd_mach_o_primary_symbol_sort_key (sb);
1785 if (soa < sob)
1786 return -1;
1787
1788 if (soa > sob)
1789 return 1;
1790
1791 /* If it's local or stab, just preserve the input order. */
1792 if (soa == 0)
1793 {
1794 if (sa->symbol.udata.i < sb->symbol.udata.i)
1795 return -1;
1796 if (sa->symbol.udata.i > sb->symbol.udata.i)
1797 return 1;
1798
1799 /* This is probably an error. */
1800 return 0;
1801 }
1802
1803 /* The second sort key is name. */
1804 return strcmp (sa->symbol.name, sb->symbol.name);
1805 }
1806
1807 /* Process the symbols.
1808
1809 This should be OK for single-module files - but it is not likely to work
1810 for multi-module shared libraries.
1811
1812 (a) If the application has not filled in the relevant mach-o fields, make
1813 an estimate.
1814
1815 (b) Order them, like this:
1816 ( i) local.
1817 (unsorted)
1818 ( ii) external defined
1819 (by name)
1820 (iii) external undefined/common
1821 (by name)
1822 ( iv) common
1823 (by name)
1824 */
1825
1826 static bfd_boolean
1827 bfd_mach_o_mangle_symbols (bfd *abfd)
1828 {
1829 unsigned long i;
1830 asymbol **symbols = bfd_get_outsymbols (abfd);
1831
1832 if (symbols == NULL || bfd_get_symcount (abfd) == 0)
1833 return TRUE;
1834
1835 for (i = 0; i < bfd_get_symcount (abfd); i++)
1836 {
1837 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
1838
1839 /* We use this value, which is out-of-range as a symbol index, to signal
1840 that the mach-o-specific data are not filled in and need to be created
1841 from the bfd values. It is much preferable for the application to do
1842 this, since more meaningful diagnostics can be made that way. */
1843
1844 if (s->symbol.udata.i == SYM_MACHO_FIELDS_UNSET)
1845 {
1846 /* No symbol information has been set - therefore determine
1847 it from the bfd symbol flags/info. */
1848 if (s->symbol.section == bfd_abs_section_ptr)
1849 s->n_type = BFD_MACH_O_N_ABS;
1850 else if (s->symbol.section == bfd_und_section_ptr)
1851 {
1852 s->n_type = BFD_MACH_O_N_UNDF;
1853 if (s->symbol.flags & BSF_WEAK)
1854 s->n_desc |= BFD_MACH_O_N_WEAK_REF;
1855 /* mach-o automatically makes undefined symbols extern. */
1856 s->n_type |= BFD_MACH_O_N_EXT;
1857 s->symbol.flags |= BSF_GLOBAL;
1858 }
1859 else if (s->symbol.section == bfd_com_section_ptr)
1860 {
1861 s->n_type = BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT;
1862 s->symbol.flags |= BSF_GLOBAL;
1863 }
1864 else
1865 s->n_type = BFD_MACH_O_N_SECT;
1866
1867 if (s->symbol.flags & BSF_GLOBAL)
1868 s->n_type |= BFD_MACH_O_N_EXT;
1869 }
1870
1871 /* Put the section index in, where required. */
1872 if ((s->symbol.section != bfd_abs_section_ptr
1873 && s->symbol.section != bfd_und_section_ptr
1874 && s->symbol.section != bfd_com_section_ptr)
1875 || ((s->n_type & BFD_MACH_O_N_STAB) != 0
1876 && s->symbol.name == NULL))
1877 s->n_sect = s->symbol.section->output_section->target_index;
1878
1879 /* Number to preserve order for local and debug syms. */
1880 s->symbol.udata.i = i;
1881 }
1882
1883 /* Sort the symbols. */
1884 qsort ((void *) symbols, (size_t) bfd_get_symcount (abfd),
1885 sizeof (asymbol *), bfd_mach_o_cf_symbols);
1886
1887 for (i = 0; i < bfd_get_symcount (abfd); ++i)
1888 {
1889 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
1890 s->symbol.udata.i = i; /* renumber. */
1891 }
1892
1893 return TRUE;
1894 }
1895
1896 /* We build a flat table of sections, which can be re-ordered if necessary.
1897 Fill in the section number and other mach-o-specific data. */
1898
1899 static bfd_boolean
1900 bfd_mach_o_mangle_sections (bfd *abfd, bfd_mach_o_data_struct *mdata)
1901 {
1902 asection *sec;
1903 unsigned target_index;
1904 unsigned nsect;
1905
1906 nsect = bfd_count_sections (abfd);
1907
1908 /* Don't do it if it's already set - assume the application knows what it's
1909 doing. */
1910 if (mdata->nsects == nsect
1911 && (mdata->nsects == 0 || mdata->sections != NULL))
1912 return TRUE;
1913
1914 mdata->nsects = nsect;
1915 mdata->sections = bfd_alloc (abfd,
1916 mdata->nsects * sizeof (bfd_mach_o_section *));
1917 if (mdata->sections == NULL)
1918 return FALSE;
1919
1920 /* We need to check that this can be done... */
1921 if (nsect > 255)
1922 (*_bfd_error_handler) (_("mach-o: there are too many sections (%d)"
1923 " maximum is 255,\n"), nsect);
1924
1925 /* Create Mach-O sections.
1926 Section type, attribute and align should have been set when the
1927 section was created - either read in or specified. */
1928 target_index = 0;
1929 for (sec = abfd->sections; sec; sec = sec->next)
1930 {
1931 unsigned bfd_align = bfd_get_section_alignment (abfd, sec);
1932 bfd_mach_o_section *msect = bfd_mach_o_get_mach_o_section (sec);
1933
1934 mdata->sections[target_index] = msect;
1935
1936 msect->addr = bfd_get_section_vma (abfd, sec);
1937 msect->size = bfd_get_section_size (sec);
1938
1939 /* Use the largest alignment set, in case it was bumped after the
1940 section was created. */
1941 msect->align = msect->align > bfd_align ? msect->align : bfd_align;
1942
1943 msect->offset = 0;
1944 sec->target_index = ++target_index;
1945 }
1946
1947 return TRUE;
1948 }
1949
1950 bfd_boolean
1951 bfd_mach_o_write_contents (bfd *abfd)
1952 {
1953 unsigned int i;
1954 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1955
1956 /* Make the commands, if not already present. */
1957 if (mdata->header.ncmds == 0)
1958 if (!bfd_mach_o_build_commands (abfd))
1959 return FALSE;
1960
1961 if (!bfd_mach_o_write_header (abfd, &mdata->header))
1962 return FALSE;
1963
1964 for (i = 0; i < mdata->header.ncmds; i++)
1965 {
1966 struct mach_o_load_command_external raw;
1967 bfd_mach_o_load_command *cur = &mdata->commands[i];
1968 unsigned long typeflag;
1969
1970 typeflag = cur->type | (cur->type_required ? BFD_MACH_O_LC_REQ_DYLD : 0);
1971
1972 bfd_h_put_32 (abfd, typeflag, raw.cmd);
1973 bfd_h_put_32 (abfd, cur->len, raw.cmdsize);
1974
1975 if (bfd_seek (abfd, cur->offset, SEEK_SET) != 0
1976 || bfd_bwrite (&raw, BFD_MACH_O_LC_SIZE, abfd) != 8)
1977 return FALSE;
1978
1979 switch (cur->type)
1980 {
1981 case BFD_MACH_O_LC_SEGMENT:
1982 if (!bfd_mach_o_write_segment_32 (abfd, cur))
1983 return FALSE;
1984 break;
1985 case BFD_MACH_O_LC_SEGMENT_64:
1986 if (!bfd_mach_o_write_segment_64 (abfd, cur))
1987 return FALSE;
1988 break;
1989 case BFD_MACH_O_LC_SYMTAB:
1990 if (!bfd_mach_o_write_symtab (abfd, cur))
1991 return FALSE;
1992 break;
1993 case BFD_MACH_O_LC_DYSYMTAB:
1994 if (!bfd_mach_o_write_dysymtab (abfd, cur))
1995 return FALSE;
1996 break;
1997 case BFD_MACH_O_LC_SYMSEG:
1998 break;
1999 case BFD_MACH_O_LC_THREAD:
2000 case BFD_MACH_O_LC_UNIXTHREAD:
2001 if (!bfd_mach_o_write_thread (abfd, cur))
2002 return FALSE;
2003 break;
2004 case BFD_MACH_O_LC_LOADFVMLIB:
2005 case BFD_MACH_O_LC_IDFVMLIB:
2006 case BFD_MACH_O_LC_IDENT:
2007 case BFD_MACH_O_LC_FVMFILE:
2008 case BFD_MACH_O_LC_PREPAGE:
2009 case BFD_MACH_O_LC_LOAD_DYLIB:
2010 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
2011 case BFD_MACH_O_LC_ID_DYLIB:
2012 case BFD_MACH_O_LC_REEXPORT_DYLIB:
2013 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
2014 case BFD_MACH_O_LC_LOAD_DYLINKER:
2015 case BFD_MACH_O_LC_ID_DYLINKER:
2016 case BFD_MACH_O_LC_PREBOUND_DYLIB:
2017 case BFD_MACH_O_LC_ROUTINES:
2018 case BFD_MACH_O_LC_SUB_FRAMEWORK:
2019 break;
2020 default:
2021 (*_bfd_error_handler)
2022 (_("unable to write unknown load command 0x%lx"),
2023 (unsigned long) cur->type);
2024 return FALSE;
2025 }
2026 }
2027
2028 return TRUE;
2029 }
2030
2031 static void
2032 bfd_mach_o_append_section_to_segment (bfd_mach_o_segment_command *seg,
2033 asection *sec)
2034 {
2035 bfd_mach_o_section *s = (bfd_mach_o_section *)sec->used_by_bfd;
2036 if (seg->sect_head == NULL)
2037 seg->sect_head = s;
2038 else
2039 seg->sect_tail->next = s;
2040 seg->sect_tail = s;
2041 }
2042
2043 /* Create section Mach-O flags from BFD flags. */
2044
2045 static void
2046 bfd_mach_o_set_section_flags_from_bfd (bfd *abfd ATTRIBUTE_UNUSED,
2047 asection *sec)
2048 {
2049 flagword bfd_flags;
2050 bfd_mach_o_section *s = bfd_mach_o_get_mach_o_section (sec);
2051
2052 /* Create default flags. */
2053 bfd_flags = bfd_get_section_flags (abfd, sec);
2054 if ((bfd_flags & SEC_CODE) == SEC_CODE)
2055 s->flags = BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS
2056 | BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS
2057 | BFD_MACH_O_S_REGULAR;
2058 else if ((bfd_flags & (SEC_ALLOC | SEC_LOAD)) == SEC_ALLOC)
2059 s->flags = BFD_MACH_O_S_ZEROFILL;
2060 else if (bfd_flags & SEC_DEBUGGING)
2061 s->flags = BFD_MACH_O_S_REGULAR | BFD_MACH_O_S_ATTR_DEBUG;
2062 else
2063 s->flags = BFD_MACH_O_S_REGULAR;
2064 }
2065
2066 /* Count the number of sections in the list for the segment named.
2067
2068 The special case of NULL or "" for the segment name is valid for
2069 an MH_OBJECT file and means 'all sections available'.
2070
2071 Requires that the sections table in mdata be filled in.
2072
2073 Returns the number of sections (0 is valid).
2074 Any number > 255 signals an invalid section count, although we will,
2075 perhaps, allow the file to be written (in line with Darwin tools up
2076 to XCode 4).
2077
2078 A section count of (unsigned long) -1 signals a definite error. */
2079
2080 static unsigned long
2081 bfd_mach_o_count_sections_for_seg (const char *segment,
2082 bfd_mach_o_data_struct *mdata)
2083 {
2084 unsigned i,j;
2085 if (mdata == NULL || mdata->sections == NULL)
2086 return (unsigned long) -1;
2087
2088 /* The MH_OBJECT case, all sections are considered; Although nsects is
2089 is an unsigned long, the maximum valid section count is 255 and this
2090 will have been checked already by mangle_sections. */
2091 if (segment == NULL || segment[0] == '\0')
2092 return mdata->nsects;
2093
2094 /* Count the number of sections we see in this segment. */
2095 j = 0;
2096 for (i = 0; i < mdata->nsects; ++i)
2097 {
2098 bfd_mach_o_section *s = mdata->sections[i];
2099 if (strncmp (segment, s->segname, BFD_MACH_O_SEGNAME_SIZE) == 0)
2100 j++;
2101 }
2102 return j;
2103 }
2104
2105 static bfd_boolean
2106 bfd_mach_o_build_seg_command (const char *segment,
2107 bfd_mach_o_data_struct *mdata,
2108 bfd_mach_o_segment_command *seg)
2109 {
2110 unsigned i;
2111 int is_mho = (segment == NULL || segment[0] == '\0');
2112
2113 /* Fill segment command. */
2114 if (is_mho)
2115 memset (seg->segname, 0, sizeof (seg->segname));
2116 else
2117 strncpy (seg->segname, segment, sizeof (seg->segname));
2118
2119 /* TODO: fix this up for non-MH_OBJECT cases. */
2120 seg->vmaddr = 0;
2121 seg->vmsize = 0;
2122
2123 seg->fileoff = mdata->filelen;
2124 seg->filesize = 0;
2125 seg->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
2126 | BFD_MACH_O_PROT_EXECUTE;
2127 seg->initprot = seg->maxprot;
2128 seg->flags = 0;
2129 seg->sect_head = NULL;
2130 seg->sect_tail = NULL;
2131
2132 /* Append sections to the segment.
2133
2134 This is a little tedious, we have to honor the need to account zerofill
2135 sections after all the rest. This forces us to do the calculation of
2136 total vmsize in three passes so that any alignment increments are
2137 properly accounted. */
2138
2139 for (i = 0; i < mdata->nsects; ++i)
2140 {
2141 bfd_mach_o_section *s = mdata->sections[i];
2142 asection *sec = s->bfdsection;
2143
2144 /* If we're not making an MH_OBJECT, check whether this section is from
2145 our segment, and skip if not. Otherwise, just add all sections. */
2146 if (! is_mho
2147 && strncmp (segment, s->segname, BFD_MACH_O_SEGNAME_SIZE) != 0)
2148 continue;
2149
2150 /* Although we account for zerofill section sizes in vm order, they are
2151 placed in the file in source sequence. */
2152 bfd_mach_o_append_section_to_segment (seg, sec);
2153 s->offset = 0;
2154
2155 /* Zerofill sections have zero file size & offset,
2156 and are not written. */
2157 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) == BFD_MACH_O_S_ZEROFILL
2158 || (s->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2159 == BFD_MACH_O_S_GB_ZEROFILL)
2160 continue;
2161
2162 if (s->size > 0)
2163 {
2164 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2165 seg->vmsize += s->size;
2166
2167 seg->filesize = FILE_ALIGN (seg->filesize, s->align);
2168 seg->filesize += s->size;
2169
2170 /* Note: follow alignment even for object file. */
2171 mdata->filelen = FILE_ALIGN (mdata->filelen, s->align);
2172 s->offset = mdata->filelen;
2173 }
2174
2175 sec->filepos = s->offset;
2176 mdata->filelen += s->size;
2177 }
2178
2179 /* Be sure the file offset of the segment is the file offset of its first
2180 section (may have changed due to alignment). */
2181 if (seg->sect_head != NULL)
2182 seg->fileoff = seg->sect_head->offset;
2183
2184 /* Now pass through again, for zerofill, only now we just update the
2185 vmsize. */
2186 for (i = 0; i < mdata->nsects; ++i)
2187 {
2188 bfd_mach_o_section *s = mdata->sections[i];
2189
2190 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != BFD_MACH_O_S_ZEROFILL)
2191 continue;
2192
2193 if (! is_mho
2194 && strncmp (segment, s->segname, BFD_MACH_O_SEGNAME_SIZE) != 0)
2195 continue;
2196
2197 if (s->size > 0)
2198 {
2199 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2200 seg->vmsize += s->size;
2201 }
2202 }
2203
2204 /* Now pass through again, for zerofill_GB. */
2205 for (i = 0; i < mdata->nsects; ++i)
2206 {
2207 bfd_mach_o_section *s = mdata->sections[i];
2208
2209 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != BFD_MACH_O_S_GB_ZEROFILL)
2210 continue;
2211
2212 if (! is_mho
2213 && strncmp (segment, s->segname, BFD_MACH_O_SEGNAME_SIZE) != 0)
2214 continue;
2215
2216 if (s->size > 0)
2217 {
2218 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2219 seg->vmsize += s->size;
2220 }
2221 }
2222
2223 /* Allocate space for the relocations. */
2224 mdata->filelen = FILE_ALIGN (mdata->filelen, 2);
2225
2226 for (i = 0; i < mdata->nsects; ++i)
2227 {
2228 bfd_mach_o_section *ms = mdata->sections[i];
2229 asection *sec = ms->bfdsection;
2230
2231 if ((ms->nreloc = sec->reloc_count) == 0)
2232 {
2233 ms->reloff = 0;
2234 continue;
2235 }
2236 sec->rel_filepos = mdata->filelen;
2237 ms->reloff = sec->rel_filepos;
2238 mdata->filelen += sec->reloc_count * BFD_MACH_O_RELENT_SIZE;
2239 }
2240
2241 return TRUE;
2242 }
2243
2244 /* Count the number of indirect symbols in the image.
2245 Requires that the sections are in their final order. */
2246
2247 static unsigned int
2248 bfd_mach_o_count_indirect_symbols (bfd *abfd, bfd_mach_o_data_struct *mdata)
2249 {
2250 unsigned int i;
2251 unsigned int nisyms = 0;
2252
2253 for (i = 0; i < mdata->nsects; ++i)
2254 {
2255 bfd_mach_o_section *sec = mdata->sections[i];
2256
2257 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2258 {
2259 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
2260 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
2261 case BFD_MACH_O_S_SYMBOL_STUBS:
2262 nisyms += bfd_mach_o_section_get_nbr_indirect (abfd, sec);
2263 break;
2264 default:
2265 break;
2266 }
2267 }
2268 return nisyms;
2269 }
2270
2271 static bfd_boolean
2272 bfd_mach_o_build_dysymtab_command (bfd *abfd,
2273 bfd_mach_o_data_struct *mdata,
2274 bfd_mach_o_load_command *cmd)
2275 {
2276 bfd_mach_o_dysymtab_command *dsym = &cmd->command.dysymtab;
2277
2278 /* TODO:
2279 We are not going to try and fill these in yet and, moreover, we are
2280 going to bail if they are already set. */
2281 if (dsym->nmodtab != 0
2282 || dsym->ntoc != 0
2283 || dsym->nextrefsyms != 0)
2284 {
2285 (*_bfd_error_handler) (_("sorry: modtab, toc and extrefsyms are not yet"
2286 " implemented for dysymtab commands."));
2287 return FALSE;
2288 }
2289
2290 dsym->ilocalsym = 0;
2291
2292 if (bfd_get_symcount (abfd) > 0)
2293 {
2294 asymbol **symbols = bfd_get_outsymbols (abfd);
2295 unsigned long i;
2296
2297 /* Count the number of each kind of symbol. */
2298 for (i = 0; i < bfd_get_symcount (abfd); ++i)
2299 {
2300 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2301 if (s->n_type & (BFD_MACH_O_N_EXT | BFD_MACH_O_N_PEXT))
2302 break;
2303 }
2304 dsym->nlocalsym = i;
2305 dsym->iextdefsym = i;
2306 for (; i < bfd_get_symcount (abfd); ++i)
2307 {
2308 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2309 if ((s->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_UNDF)
2310 break;
2311 }
2312 dsym->nextdefsym = i - dsym->nlocalsym;
2313 dsym->iundefsym = dsym->nextdefsym + dsym->iextdefsym;
2314 dsym->nundefsym = bfd_get_symcount (abfd)
2315 - dsym->nlocalsym
2316 - dsym->nextdefsym;
2317 }
2318 else
2319 {
2320 dsym->nlocalsym = 0;
2321 dsym->iextdefsym = 0;
2322 dsym->nextdefsym = 0;
2323 dsym->iundefsym = 0;
2324 dsym->nundefsym = 0;
2325 }
2326
2327 dsym->nindirectsyms = bfd_mach_o_count_indirect_symbols (abfd, mdata);
2328 if (dsym->nindirectsyms > 0)
2329 {
2330 unsigned i;
2331 unsigned n;
2332
2333 mdata->filelen = FILE_ALIGN (mdata->filelen, 2);
2334 dsym->indirectsymoff = mdata->filelen;
2335 mdata->filelen += dsym->nindirectsyms * 4;
2336
2337 dsym->indirect_syms = bfd_zalloc (abfd, dsym->nindirectsyms * 4);
2338 if (dsym->indirect_syms == NULL)
2339 return FALSE;
2340
2341 n = 0;
2342 for (i = 0; i < mdata->nsects; ++i)
2343 {
2344 bfd_mach_o_section *sec = mdata->sections[i];
2345
2346 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2347 {
2348 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
2349 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
2350 case BFD_MACH_O_S_SYMBOL_STUBS:
2351 {
2352 unsigned j, num;
2353 bfd_mach_o_asymbol **isyms = sec->indirect_syms;
2354
2355 num = bfd_mach_o_section_get_nbr_indirect (abfd, sec);
2356 if (isyms == NULL || num == 0)
2357 break;
2358 /* Record the starting index in the reserved1 field. */
2359 sec->reserved1 = n;
2360 for (j = 0; j < num; j++, n++)
2361 {
2362 if (isyms[j] == NULL)
2363 dsym->indirect_syms[n] = BFD_MACH_O_INDIRECT_SYM_LOCAL;
2364 else if (isyms[j]->symbol.section == bfd_abs_section_ptr
2365 && ! (isyms[j]->n_type & BFD_MACH_O_N_EXT))
2366 dsym->indirect_syms[n] = BFD_MACH_O_INDIRECT_SYM_LOCAL
2367 | BFD_MACH_O_INDIRECT_SYM_ABS;
2368 else
2369 dsym->indirect_syms[n] = isyms[j]->symbol.udata.i;
2370 }
2371 }
2372 break;
2373 default:
2374 break;
2375 }
2376 }
2377 }
2378
2379 return TRUE;
2380 }
2381
2382 /* Build Mach-O load commands (currently assuming an MH_OBJECT file).
2383 TODO: Other file formats, rebuilding symtab/dysymtab commands for strip
2384 and copy functionality. */
2385
2386 bfd_boolean
2387 bfd_mach_o_build_commands (bfd *abfd)
2388 {
2389 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2390 unsigned wide = mach_o_wide_p (&mdata->header);
2391 int segcmd_idx = -1;
2392 int symtab_idx = -1;
2393 int dysymtab_idx = -1;
2394 unsigned long base_offset = 0;
2395
2396 /* Return now if commands are already present. */
2397 if (mdata->header.ncmds)
2398 return FALSE;
2399
2400 /* Fill in the file type, if not already set. */
2401
2402 if (mdata->header.filetype == 0)
2403 {
2404 if (abfd->flags & EXEC_P)
2405 mdata->header.filetype = BFD_MACH_O_MH_EXECUTE;
2406 else if (abfd->flags & DYNAMIC)
2407 mdata->header.filetype = BFD_MACH_O_MH_DYLIB;
2408 else
2409 mdata->header.filetype = BFD_MACH_O_MH_OBJECT;
2410 }
2411
2412 /* If hasn't already been done, flatten sections list, and sort
2413 if/when required. Must be done before the symbol table is adjusted,
2414 since that depends on properly numbered sections. */
2415 if (mdata->nsects == 0 || mdata->sections == NULL)
2416 if (! bfd_mach_o_mangle_sections (abfd, mdata))
2417 return FALSE;
2418
2419 /* Order the symbol table, fill-in/check mach-o specific fields and
2420 partition out any indirect symbols. */
2421 if (!bfd_mach_o_mangle_symbols (abfd))
2422 return FALSE;
2423
2424 /* Very simple command set (only really applicable to MH_OBJECTs):
2425 All the commands are optional - present only when there is suitable data.
2426 (i.e. it is valid to have an empty file)
2427
2428 a command (segment) to contain all the sections,
2429 command for the symbol table,
2430 a command for the dysymtab.
2431
2432 ??? maybe we should assert that this is an MH_OBJECT? */
2433
2434 if (mdata->nsects > 0)
2435 {
2436 segcmd_idx = 0;
2437 mdata->header.ncmds = 1;
2438 }
2439
2440 if (bfd_get_symcount (abfd) > 0)
2441 {
2442 mdata->header.ncmds++;
2443 symtab_idx = segcmd_idx + 1; /* 0 if the seg command is absent. */
2444 }
2445
2446 /* FIXME:
2447 This is a rather crude test for whether we should build a dysymtab. */
2448 if (bfd_mach_o_should_emit_dysymtab ()
2449 && bfd_get_symcount (abfd))
2450 {
2451 mdata->header.ncmds++;
2452 /* If there should be a case where a dysymtab could be emitted without
2453 a symtab (seems improbable), this would need amending. */
2454 dysymtab_idx = symtab_idx + 1;
2455 }
2456
2457 if (wide)
2458 base_offset = BFD_MACH_O_HEADER_64_SIZE;
2459 else
2460 base_offset = BFD_MACH_O_HEADER_SIZE;
2461
2462 /* Well, we must have a header, at least. */
2463 mdata->filelen = base_offset;
2464
2465 /* A bit unusual, but no content is valid;
2466 as -n empty.s -o empty.o */
2467 if (mdata->header.ncmds == 0)
2468 return TRUE;
2469
2470 mdata->commands = bfd_zalloc (abfd, mdata->header.ncmds
2471 * sizeof (bfd_mach_o_load_command));
2472 if (mdata->commands == NULL)
2473 return FALSE;
2474
2475 if (segcmd_idx >= 0)
2476 {
2477 bfd_mach_o_load_command *cmd = &mdata->commands[segcmd_idx];
2478 bfd_mach_o_segment_command *seg = &cmd->command.segment;
2479
2480 /* Count the segctions in the special blank segment used
2481 for MH_OBJECT. */
2482 seg->nsects = bfd_mach_o_count_sections_for_seg (NULL, mdata);
2483 if (seg->nsects == (unsigned long) -1)
2484 return FALSE;
2485
2486 /* Init segment command. */
2487 cmd->offset = base_offset;
2488 if (wide)
2489 {
2490 cmd->type = BFD_MACH_O_LC_SEGMENT_64;
2491 cmd->len = BFD_MACH_O_LC_SEGMENT_64_SIZE
2492 + BFD_MACH_O_SECTION_64_SIZE * seg->nsects;
2493 }
2494 else
2495 {
2496 cmd->type = BFD_MACH_O_LC_SEGMENT;
2497 cmd->len = BFD_MACH_O_LC_SEGMENT_SIZE
2498 + BFD_MACH_O_SECTION_SIZE * seg->nsects;
2499 }
2500
2501 cmd->type_required = FALSE;
2502 mdata->header.sizeofcmds = cmd->len;
2503 mdata->filelen += cmd->len;
2504 }
2505
2506 if (symtab_idx >= 0)
2507 {
2508 /* Init symtab command. */
2509 bfd_mach_o_load_command *cmd = &mdata->commands[symtab_idx];
2510
2511 cmd->type = BFD_MACH_O_LC_SYMTAB;
2512 cmd->offset = base_offset;
2513 if (segcmd_idx >= 0)
2514 cmd->offset += mdata->commands[segcmd_idx].len;
2515
2516 cmd->len = sizeof (struct mach_o_symtab_command_external)
2517 + BFD_MACH_O_LC_SIZE;
2518 cmd->type_required = FALSE;
2519 mdata->header.sizeofcmds += cmd->len;
2520 mdata->filelen += cmd->len;
2521 }
2522
2523 /* If required, setup symtab command, see comment above about the quality
2524 of this test. */
2525 if (dysymtab_idx >= 0)
2526 {
2527 bfd_mach_o_load_command *cmd = &mdata->commands[dysymtab_idx];
2528
2529 cmd->type = BFD_MACH_O_LC_DYSYMTAB;
2530 if (symtab_idx >= 0)
2531 cmd->offset = mdata->commands[symtab_idx].offset
2532 + mdata->commands[symtab_idx].len;
2533 else if (segcmd_idx >= 0)
2534 cmd->offset = mdata->commands[segcmd_idx].offset
2535 + mdata->commands[segcmd_idx].len;
2536 else
2537 cmd->offset = base_offset;
2538
2539 cmd->type_required = FALSE;
2540 cmd->len = sizeof (struct mach_o_dysymtab_command_external)
2541 + BFD_MACH_O_LC_SIZE;
2542
2543 mdata->header.sizeofcmds += cmd->len;
2544 mdata->filelen += cmd->len;
2545 }
2546
2547 /* So, now we have sized the commands and the filelen set to that.
2548 Now we can build the segment command and set the section file offsets. */
2549 if (segcmd_idx >= 0
2550 && ! bfd_mach_o_build_seg_command
2551 (NULL, mdata, &mdata->commands[segcmd_idx].command.segment))
2552 return FALSE;
2553
2554 /* If we're doing a dysymtab, cmd points to its load command. */
2555 if (dysymtab_idx >= 0
2556 && ! bfd_mach_o_build_dysymtab_command (abfd, mdata,
2557 &mdata->commands[dysymtab_idx]))
2558 return FALSE;
2559
2560 /* The symtab command is filled in when the symtab is written. */
2561 return TRUE;
2562 }
2563
2564 /* Set the contents of a section. */
2565
2566 bfd_boolean
2567 bfd_mach_o_set_section_contents (bfd *abfd,
2568 asection *section,
2569 const void * location,
2570 file_ptr offset,
2571 bfd_size_type count)
2572 {
2573 file_ptr pos;
2574
2575 /* Trying to write the first section contents will trigger the creation of
2576 the load commands if they are not already present. */
2577 if (! abfd->output_has_begun && ! bfd_mach_o_build_commands (abfd))
2578 return FALSE;
2579
2580 if (count == 0)
2581 return TRUE;
2582
2583 pos = section->filepos + offset;
2584 if (bfd_seek (abfd, pos, SEEK_SET) != 0
2585 || bfd_bwrite (location, count, abfd) != count)
2586 return FALSE;
2587
2588 return TRUE;
2589 }
2590
2591 int
2592 bfd_mach_o_sizeof_headers (bfd *a ATTRIBUTE_UNUSED,
2593 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2594 {
2595 return 0;
2596 }
2597
2598 /* Make an empty symbol. This is required only because
2599 bfd_make_section_anyway wants to create a symbol for the section. */
2600
2601 asymbol *
2602 bfd_mach_o_make_empty_symbol (bfd *abfd)
2603 {
2604 asymbol *new_symbol;
2605
2606 new_symbol = bfd_zalloc (abfd, sizeof (bfd_mach_o_asymbol));
2607 if (new_symbol == NULL)
2608 return new_symbol;
2609 new_symbol->the_bfd = abfd;
2610 new_symbol->udata.i = SYM_MACHO_FIELDS_UNSET;
2611 return new_symbol;
2612 }
2613
2614 static bfd_boolean
2615 bfd_mach_o_read_header (bfd *abfd, bfd_mach_o_header *header)
2616 {
2617 struct mach_o_header_external raw;
2618 unsigned int size;
2619 bfd_vma (*get32) (const void *) = NULL;
2620
2621 /* Just read the magic number. */
2622 if (bfd_seek (abfd, 0, SEEK_SET) != 0
2623 || bfd_bread (raw.magic, sizeof (raw.magic), abfd) != 4)
2624 return FALSE;
2625
2626 if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC)
2627 {
2628 header->byteorder = BFD_ENDIAN_BIG;
2629 header->magic = BFD_MACH_O_MH_MAGIC;
2630 header->version = 1;
2631 get32 = bfd_getb32;
2632 }
2633 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC)
2634 {
2635 header->byteorder = BFD_ENDIAN_LITTLE;
2636 header->magic = BFD_MACH_O_MH_MAGIC;
2637 header->version = 1;
2638 get32 = bfd_getl32;
2639 }
2640 else if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64)
2641 {
2642 header->byteorder = BFD_ENDIAN_BIG;
2643 header->magic = BFD_MACH_O_MH_MAGIC_64;
2644 header->version = 2;
2645 get32 = bfd_getb32;
2646 }
2647 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64)
2648 {
2649 header->byteorder = BFD_ENDIAN_LITTLE;
2650 header->magic = BFD_MACH_O_MH_MAGIC_64;
2651 header->version = 2;
2652 get32 = bfd_getl32;
2653 }
2654 else
2655 {
2656 header->byteorder = BFD_ENDIAN_UNKNOWN;
2657 return FALSE;
2658 }
2659
2660 /* Once the size of the header is known, read the full header. */
2661 size = mach_o_wide_p (header) ?
2662 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
2663
2664 if (bfd_seek (abfd, 0, SEEK_SET) != 0
2665 || bfd_bread (&raw, size, abfd) != size)
2666 return FALSE;
2667
2668 header->cputype = (*get32) (raw.cputype);
2669 header->cpusubtype = (*get32) (raw.cpusubtype);
2670 header->filetype = (*get32) (raw.filetype);
2671 header->ncmds = (*get32) (raw.ncmds);
2672 header->sizeofcmds = (*get32) (raw.sizeofcmds);
2673 header->flags = (*get32) (raw.flags);
2674
2675 if (mach_o_wide_p (header))
2676 header->reserved = (*get32) (raw.reserved);
2677 else
2678 header->reserved = 0;
2679
2680 return TRUE;
2681 }
2682
2683 bfd_boolean
2684 bfd_mach_o_new_section_hook (bfd *abfd, asection *sec)
2685 {
2686 bfd_mach_o_section *s;
2687 unsigned bfdalign = bfd_get_section_alignment (abfd, sec);
2688
2689 s = bfd_mach_o_get_mach_o_section (sec);
2690 if (s == NULL)
2691 {
2692 flagword bfd_flags;
2693 static const mach_o_section_name_xlat * xlat;
2694
2695 s = (bfd_mach_o_section *) bfd_zalloc (abfd, sizeof (*s));
2696 if (s == NULL)
2697 return FALSE;
2698 sec->used_by_bfd = s;
2699 s->bfdsection = sec;
2700
2701 /* Create the Darwin seg/sect name pair from the bfd name.
2702 If this is a canonical name for which a specific paiting exists
2703 there will also be defined flags, type, attribute and alignment
2704 values. */
2705 xlat = bfd_mach_o_convert_section_name_to_mach_o (abfd, sec, s);
2706 if (xlat != NULL)
2707 {
2708 s->flags = xlat->macho_sectype | xlat->macho_secattr;
2709 s->align = xlat->sectalign > bfdalign ? xlat->sectalign
2710 : bfdalign;
2711 (void) bfd_set_section_alignment (abfd, sec, s->align);
2712 bfd_flags = bfd_get_section_flags (abfd, sec);
2713 if (bfd_flags == SEC_NO_FLAGS)
2714 bfd_set_section_flags (abfd, sec, xlat->bfd_flags);
2715 }
2716 else
2717 /* Create default flags. */
2718 bfd_mach_o_set_section_flags_from_bfd (abfd, sec);
2719 }
2720
2721 return _bfd_generic_new_section_hook (abfd, sec);
2722 }
2723
2724 static void
2725 bfd_mach_o_init_section_from_mach_o (bfd *abfd, asection *sec,
2726 unsigned long prot)
2727 {
2728 flagword flags;
2729 bfd_mach_o_section *section;
2730
2731 flags = bfd_get_section_flags (abfd, sec);
2732 section = bfd_mach_o_get_mach_o_section (sec);
2733
2734 /* TODO: see if we should use the xlat system for doing this by
2735 preference and fall back to this for unknown sections. */
2736
2737 if (flags == SEC_NO_FLAGS)
2738 {
2739 /* Try to guess flags. */
2740 if (section->flags & BFD_MACH_O_S_ATTR_DEBUG)
2741 flags = SEC_DEBUGGING;
2742 else
2743 {
2744 flags = SEC_ALLOC;
2745 if ((section->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2746 != BFD_MACH_O_S_ZEROFILL)
2747 {
2748 flags |= SEC_LOAD;
2749 if (prot & BFD_MACH_O_PROT_EXECUTE)
2750 flags |= SEC_CODE;
2751 if (prot & BFD_MACH_O_PROT_WRITE)
2752 flags |= SEC_DATA;
2753 else if (prot & BFD_MACH_O_PROT_READ)
2754 flags |= SEC_READONLY;
2755 }
2756 }
2757 }
2758 else
2759 {
2760 if ((flags & SEC_DEBUGGING) == 0)
2761 flags |= SEC_ALLOC;
2762 }
2763
2764 if (section->offset != 0)
2765 flags |= SEC_HAS_CONTENTS;
2766 if (section->nreloc != 0)
2767 flags |= SEC_RELOC;
2768
2769 bfd_set_section_flags (abfd, sec, flags);
2770
2771 sec->vma = section->addr;
2772 sec->lma = section->addr;
2773 sec->size = section->size;
2774 sec->filepos = section->offset;
2775 sec->alignment_power = section->align;
2776 sec->segment_mark = 0;
2777 sec->reloc_count = section->nreloc;
2778 sec->rel_filepos = section->reloff;
2779 }
2780
2781 static asection *
2782 bfd_mach_o_make_bfd_section (bfd *abfd,
2783 const unsigned char *segname,
2784 const unsigned char *sectname)
2785 {
2786 const char *sname;
2787 flagword flags;
2788
2789 bfd_mach_o_convert_section_name_to_bfd
2790 (abfd, (const char *)segname, (const char *)sectname, &sname, &flags);
2791 if (sname == NULL)
2792 return NULL;
2793
2794 return bfd_make_section_anyway_with_flags (abfd, sname, flags);
2795 }
2796
2797 static asection *
2798 bfd_mach_o_read_section_32 (bfd *abfd,
2799 unsigned int offset,
2800 unsigned long prot)
2801 {
2802 struct mach_o_section_32_external raw;
2803 asection *sec;
2804 bfd_mach_o_section *section;
2805
2806 if (bfd_seek (abfd, offset, SEEK_SET) != 0
2807 || (bfd_bread (&raw, BFD_MACH_O_SECTION_SIZE, abfd)
2808 != BFD_MACH_O_SECTION_SIZE))
2809 return NULL;
2810
2811 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname);
2812 if (sec == NULL)
2813 return NULL;
2814
2815 section = bfd_mach_o_get_mach_o_section (sec);
2816 memcpy (section->segname, raw.segname, sizeof (raw.segname));
2817 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0;
2818 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname));
2819 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0;
2820 section->addr = bfd_h_get_32 (abfd, raw.addr);
2821 section->size = bfd_h_get_32 (abfd, raw.size);
2822 section->offset = bfd_h_get_32 (abfd, raw.offset);
2823 section->align = bfd_h_get_32 (abfd, raw.align);
2824 section->reloff = bfd_h_get_32 (abfd, raw.reloff);
2825 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc);
2826 section->flags = bfd_h_get_32 (abfd, raw.flags);
2827 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1);
2828 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2);
2829 section->reserved3 = 0;
2830
2831 bfd_mach_o_init_section_from_mach_o (abfd, sec, prot);
2832
2833 return sec;
2834 }
2835
2836 static asection *
2837 bfd_mach_o_read_section_64 (bfd *abfd,
2838 unsigned int offset,
2839 unsigned long prot)
2840 {
2841 struct mach_o_section_64_external raw;
2842 asection *sec;
2843 bfd_mach_o_section *section;
2844
2845 if (bfd_seek (abfd, offset, SEEK_SET) != 0
2846 || (bfd_bread (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd)
2847 != BFD_MACH_O_SECTION_64_SIZE))
2848 return NULL;
2849
2850 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname);
2851 if (sec == NULL)
2852 return NULL;
2853
2854 section = bfd_mach_o_get_mach_o_section (sec);
2855 memcpy (section->segname, raw.segname, sizeof (raw.segname));
2856 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0;
2857 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname));
2858 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0;
2859 section->addr = bfd_h_get_64 (abfd, raw.addr);
2860 section->size = bfd_h_get_64 (abfd, raw.size);
2861 section->offset = bfd_h_get_32 (abfd, raw.offset);
2862 section->align = bfd_h_get_32 (abfd, raw.align);
2863 section->reloff = bfd_h_get_32 (abfd, raw.reloff);
2864 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc);
2865 section->flags = bfd_h_get_32 (abfd, raw.flags);
2866 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1);
2867 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2);
2868 section->reserved3 = bfd_h_get_32 (abfd, raw.reserved3);
2869
2870 bfd_mach_o_init_section_from_mach_o (abfd, sec, prot);
2871
2872 return sec;
2873 }
2874
2875 static asection *
2876 bfd_mach_o_read_section (bfd *abfd,
2877 unsigned int offset,
2878 unsigned long prot,
2879 unsigned int wide)
2880 {
2881 if (wide)
2882 return bfd_mach_o_read_section_64 (abfd, offset, prot);
2883 else
2884 return bfd_mach_o_read_section_32 (abfd, offset, prot);
2885 }
2886
2887 static bfd_boolean
2888 bfd_mach_o_read_symtab_symbol (bfd *abfd,
2889 bfd_mach_o_symtab_command *sym,
2890 bfd_mach_o_asymbol *s,
2891 unsigned long i)
2892 {
2893 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2894 unsigned int wide = mach_o_wide_p (&mdata->header);
2895 unsigned int symwidth =
2896 wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE;
2897 unsigned int symoff = sym->symoff + (i * symwidth);
2898 struct mach_o_nlist_64_external raw;
2899 unsigned char type = -1;
2900 unsigned char section = -1;
2901 short desc = -1;
2902 symvalue value = -1;
2903 unsigned long stroff = -1;
2904 unsigned int symtype = -1;
2905
2906 BFD_ASSERT (sym->strtab != NULL);
2907
2908 if (bfd_seek (abfd, symoff, SEEK_SET) != 0
2909 || bfd_bread (&raw, symwidth, abfd) != symwidth)
2910 {
2911 (*_bfd_error_handler)
2912 (_("bfd_mach_o_read_symtab_symbol: unable to read %d bytes at %lu"),
2913 symwidth, (unsigned long) symoff);
2914 return FALSE;
2915 }
2916
2917 stroff = bfd_h_get_32 (abfd, raw.n_strx);
2918 type = bfd_h_get_8 (abfd, raw.n_type);
2919 symtype = type & BFD_MACH_O_N_TYPE;
2920 section = bfd_h_get_8 (abfd, raw.n_sect);
2921 desc = bfd_h_get_16 (abfd, raw.n_desc);
2922 if (wide)
2923 value = bfd_h_get_64 (abfd, raw.n_value);
2924 else
2925 value = bfd_h_get_32 (abfd, raw.n_value);
2926
2927 if (stroff >= sym->strsize)
2928 {
2929 (*_bfd_error_handler)
2930 (_("bfd_mach_o_read_symtab_symbol: name out of range (%lu >= %lu)"),
2931 (unsigned long) stroff,
2932 (unsigned long) sym->strsize);
2933 return FALSE;
2934 }
2935
2936 s->symbol.the_bfd = abfd;
2937 s->symbol.name = sym->strtab + stroff;
2938 s->symbol.value = value;
2939 s->symbol.flags = 0x0;
2940 s->symbol.udata.i = i;
2941 s->n_type = type;
2942 s->n_sect = section;
2943 s->n_desc = desc;
2944
2945 if (type & BFD_MACH_O_N_STAB)
2946 {
2947 s->symbol.flags |= BSF_DEBUGGING;
2948 s->symbol.section = bfd_und_section_ptr;
2949 switch (type)
2950 {
2951 case N_FUN:
2952 case N_STSYM:
2953 case N_LCSYM:
2954 case N_BNSYM:
2955 case N_SLINE:
2956 case N_ENSYM:
2957 case N_ECOMM:
2958 case N_ECOML:
2959 case N_GSYM:
2960 if ((section > 0) && (section <= mdata->nsects))
2961 {
2962 s->symbol.section = mdata->sections[section - 1]->bfdsection;
2963 s->symbol.value =
2964 s->symbol.value - mdata->sections[section - 1]->addr;
2965 }
2966 break;
2967 }
2968 }
2969 else
2970 {
2971 if (type & (BFD_MACH_O_N_PEXT | BFD_MACH_O_N_EXT))
2972 s->symbol.flags |= BSF_GLOBAL;
2973 else
2974 s->symbol.flags |= BSF_LOCAL;
2975
2976 switch (symtype)
2977 {
2978 case BFD_MACH_O_N_UNDF:
2979 if (type == (BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT)
2980 && s->symbol.value != 0)
2981 {
2982 /* A common symbol. */
2983 s->symbol.section = bfd_com_section_ptr;
2984 s->symbol.flags = BSF_NO_FLAGS;
2985 }
2986 else
2987 {
2988 s->symbol.section = bfd_und_section_ptr;
2989 if (s->n_desc & BFD_MACH_O_N_WEAK_REF)
2990 s->symbol.flags |= BSF_WEAK;
2991 }
2992 break;
2993 case BFD_MACH_O_N_PBUD:
2994 s->symbol.section = bfd_und_section_ptr;
2995 break;
2996 case BFD_MACH_O_N_ABS:
2997 s->symbol.section = bfd_abs_section_ptr;
2998 break;
2999 case BFD_MACH_O_N_SECT:
3000 if ((section > 0) && (section <= mdata->nsects))
3001 {
3002 s->symbol.section = mdata->sections[section - 1]->bfdsection;
3003 s->symbol.value =
3004 s->symbol.value - mdata->sections[section - 1]->addr;
3005 }
3006 else
3007 {
3008 /* Mach-O uses 0 to mean "no section"; not an error. */
3009 if (section != 0)
3010 {
3011 (*_bfd_error_handler) (_("bfd_mach_o_read_symtab_symbol: "
3012 "symbol \"%s\" specified invalid section %d (max %lu): setting to undefined"),
3013 s->symbol.name, section, mdata->nsects);
3014 }
3015 s->symbol.section = bfd_und_section_ptr;
3016 }
3017 break;
3018 case BFD_MACH_O_N_INDR:
3019 /* FIXME: we don't follow the BFD convention as this indirect symbol
3020 won't be followed by the referenced one. This looks harmless
3021 unless we start using the linker. */
3022 s->symbol.flags |= BSF_INDIRECT;
3023 s->symbol.section = bfd_ind_section_ptr;
3024 s->symbol.value = 0;
3025 break;
3026 default:
3027 (*_bfd_error_handler) (_("bfd_mach_o_read_symtab_symbol: "
3028 "symbol \"%s\" specified invalid type field 0x%x: setting to undefined"),
3029 s->symbol.name, symtype);
3030 s->symbol.section = bfd_und_section_ptr;
3031 break;
3032 }
3033 }
3034
3035 return TRUE;
3036 }
3037
3038 bfd_boolean
3039 bfd_mach_o_read_symtab_strtab (bfd *abfd)
3040 {
3041 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3042 bfd_mach_o_symtab_command *sym = mdata->symtab;
3043
3044 /* Fail if there is no symtab. */
3045 if (sym == NULL)
3046 return FALSE;
3047
3048 /* Success if already loaded. */
3049 if (sym->strtab)
3050 return TRUE;
3051
3052 if (abfd->flags & BFD_IN_MEMORY)
3053 {
3054 struct bfd_in_memory *b;
3055
3056 b = (struct bfd_in_memory *) abfd->iostream;
3057
3058 if ((sym->stroff + sym->strsize) > b->size)
3059 {
3060 bfd_set_error (bfd_error_file_truncated);
3061 return FALSE;
3062 }
3063 sym->strtab = (char *) b->buffer + sym->stroff;
3064 }
3065 else
3066 {
3067 sym->strtab = bfd_alloc (abfd, sym->strsize);
3068 if (sym->strtab == NULL)
3069 return FALSE;
3070
3071 if (bfd_seek (abfd, sym->stroff, SEEK_SET) != 0
3072 || bfd_bread (sym->strtab, sym->strsize, abfd) != sym->strsize)
3073 {
3074 bfd_set_error (bfd_error_file_truncated);
3075 return FALSE;
3076 }
3077 }
3078
3079 return TRUE;
3080 }
3081
3082 bfd_boolean
3083 bfd_mach_o_read_symtab_symbols (bfd *abfd)
3084 {
3085 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3086 bfd_mach_o_symtab_command *sym = mdata->symtab;
3087 unsigned long i;
3088
3089 if (sym == NULL || sym->symbols)
3090 {
3091 /* Return now if there are no symbols or if already loaded. */
3092 return TRUE;
3093 }
3094
3095 sym->symbols = bfd_alloc (abfd, sym->nsyms * sizeof (bfd_mach_o_asymbol));
3096
3097 if (sym->symbols == NULL)
3098 {
3099 (*_bfd_error_handler) (_("bfd_mach_o_read_symtab_symbols: unable to allocate memory for symbols"));
3100 return FALSE;
3101 }
3102
3103 if (!bfd_mach_o_read_symtab_strtab (abfd))
3104 return FALSE;
3105
3106 for (i = 0; i < sym->nsyms; i++)
3107 {
3108 if (!bfd_mach_o_read_symtab_symbol (abfd, sym, &sym->symbols[i], i))
3109 return FALSE;
3110 }
3111
3112 return TRUE;
3113 }
3114
3115 static const char *
3116 bfd_mach_o_i386_flavour_string (unsigned int flavour)
3117 {
3118 switch ((int) flavour)
3119 {
3120 case BFD_MACH_O_x86_THREAD_STATE32: return "x86_THREAD_STATE32";
3121 case BFD_MACH_O_x86_FLOAT_STATE32: return "x86_FLOAT_STATE32";
3122 case BFD_MACH_O_x86_EXCEPTION_STATE32: return "x86_EXCEPTION_STATE32";
3123 case BFD_MACH_O_x86_THREAD_STATE64: return "x86_THREAD_STATE64";
3124 case BFD_MACH_O_x86_FLOAT_STATE64: return "x86_FLOAT_STATE64";
3125 case BFD_MACH_O_x86_EXCEPTION_STATE64: return "x86_EXCEPTION_STATE64";
3126 case BFD_MACH_O_x86_THREAD_STATE: return "x86_THREAD_STATE";
3127 case BFD_MACH_O_x86_FLOAT_STATE: return "x86_FLOAT_STATE";
3128 case BFD_MACH_O_x86_EXCEPTION_STATE: return "x86_EXCEPTION_STATE";
3129 case BFD_MACH_O_x86_DEBUG_STATE32: return "x86_DEBUG_STATE32";
3130 case BFD_MACH_O_x86_DEBUG_STATE64: return "x86_DEBUG_STATE64";
3131 case BFD_MACH_O_x86_DEBUG_STATE: return "x86_DEBUG_STATE";
3132 case BFD_MACH_O_x86_THREAD_STATE_NONE: return "x86_THREAD_STATE_NONE";
3133 default: return "UNKNOWN";
3134 }
3135 }
3136
3137 static const char *
3138 bfd_mach_o_ppc_flavour_string (unsigned int flavour)
3139 {
3140 switch ((int) flavour)
3141 {
3142 case BFD_MACH_O_PPC_THREAD_STATE: return "PPC_THREAD_STATE";
3143 case BFD_MACH_O_PPC_FLOAT_STATE: return "PPC_FLOAT_STATE";
3144 case BFD_MACH_O_PPC_EXCEPTION_STATE: return "PPC_EXCEPTION_STATE";
3145 case BFD_MACH_O_PPC_VECTOR_STATE: return "PPC_VECTOR_STATE";
3146 case BFD_MACH_O_PPC_THREAD_STATE64: return "PPC_THREAD_STATE64";
3147 case BFD_MACH_O_PPC_EXCEPTION_STATE64: return "PPC_EXCEPTION_STATE64";
3148 default: return "UNKNOWN";
3149 }
3150 }
3151
3152 static bfd_boolean
3153 bfd_mach_o_read_dylinker (bfd *abfd, bfd_mach_o_load_command *command)
3154 {
3155 bfd_mach_o_dylinker_command *cmd = &command->command.dylinker;
3156 struct mach_o_str_command_external raw;
3157 unsigned int nameoff;
3158
3159 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3160 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3161 return FALSE;
3162
3163 nameoff = bfd_h_get_32 (abfd, raw.str);
3164
3165 cmd->name_offset = command->offset + nameoff;
3166 cmd->name_len = command->len - nameoff;
3167 cmd->name_str = bfd_alloc (abfd, cmd->name_len);
3168 if (cmd->name_str == NULL)
3169 return FALSE;
3170 if (bfd_seek (abfd, cmd->name_offset, SEEK_SET) != 0
3171 || bfd_bread (cmd->name_str, cmd->name_len, abfd) != cmd->name_len)
3172 return FALSE;
3173 return TRUE;
3174 }
3175
3176 static bfd_boolean
3177 bfd_mach_o_read_dylib (bfd *abfd, bfd_mach_o_load_command *command)
3178 {
3179 bfd_mach_o_dylib_command *cmd = &command->command.dylib;
3180 struct mach_o_dylib_command_external raw;
3181 unsigned int nameoff;
3182
3183 switch (command->type)
3184 {
3185 case BFD_MACH_O_LC_LOAD_DYLIB:
3186 case BFD_MACH_O_LC_LAZY_LOAD_DYLIB:
3187 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
3188 case BFD_MACH_O_LC_ID_DYLIB:
3189 case BFD_MACH_O_LC_REEXPORT_DYLIB:
3190 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
3191 break;
3192 default:
3193 BFD_FAIL ();
3194 return FALSE;
3195 }
3196
3197 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3198 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3199 return FALSE;
3200
3201 nameoff = bfd_h_get_32 (abfd, raw.name);
3202 cmd->timestamp = bfd_h_get_32 (abfd, raw.timestamp);
3203 cmd->current_version = bfd_h_get_32 (abfd, raw.current_version);
3204 cmd->compatibility_version = bfd_h_get_32 (abfd, raw.compatibility_version);
3205
3206 cmd->name_offset = command->offset + nameoff;
3207 cmd->name_len = command->len - nameoff;
3208 cmd->name_str = bfd_alloc (abfd, cmd->name_len);
3209 if (cmd->name_str == NULL)
3210 return FALSE;
3211 if (bfd_seek (abfd, cmd->name_offset, SEEK_SET) != 0
3212 || bfd_bread (cmd->name_str, cmd->name_len, abfd) != cmd->name_len)
3213 return FALSE;
3214 return TRUE;
3215 }
3216
3217 static bfd_boolean
3218 bfd_mach_o_read_prebound_dylib (bfd *abfd,
3219 bfd_mach_o_load_command *command)
3220 {
3221 bfd_mach_o_prebound_dylib_command *cmd = &command->command.prebound_dylib;
3222 struct mach_o_prebound_dylib_command_external raw;
3223 unsigned int nameoff;
3224 unsigned int modoff;
3225 unsigned int str_len;
3226 unsigned char *str;
3227
3228 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3229 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3230 return FALSE;
3231
3232 nameoff = bfd_h_get_32 (abfd, raw.name);
3233 modoff = bfd_h_get_32 (abfd, raw.linked_modules);
3234 if (nameoff > command->len || modoff > command->len)
3235 return FALSE;
3236
3237 str_len = command->len - sizeof (raw);
3238 str = bfd_alloc (abfd, str_len);
3239 if (str == NULL)
3240 return FALSE;
3241 if (bfd_bread (str, str_len, abfd) != str_len)
3242 return FALSE;
3243
3244 cmd->name_offset = command->offset + nameoff;
3245 cmd->nmodules = bfd_h_get_32 (abfd, raw.nmodules);
3246 cmd->linked_modules_offset = command->offset + modoff;
3247
3248 cmd->name_str = (char *)str + nameoff - (sizeof (raw) + BFD_MACH_O_LC_SIZE);
3249 cmd->linked_modules = str + modoff - (sizeof (raw) + BFD_MACH_O_LC_SIZE);
3250 return TRUE;
3251 }
3252
3253 static bfd_boolean
3254 bfd_mach_o_read_prebind_cksum (bfd *abfd,
3255 bfd_mach_o_load_command *command)
3256 {
3257 bfd_mach_o_prebind_cksum_command *cmd = &command->command.prebind_cksum;
3258 struct mach_o_prebind_cksum_command_external raw;
3259
3260 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3261 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3262 return FALSE;
3263
3264 cmd->cksum = bfd_get_32 (abfd, raw.cksum);
3265 return TRUE;
3266 }
3267
3268 static bfd_boolean
3269 bfd_mach_o_read_twolevel_hints (bfd *abfd,
3270 bfd_mach_o_load_command *command)
3271 {
3272 bfd_mach_o_twolevel_hints_command *cmd = &command->command.twolevel_hints;
3273 struct mach_o_twolevel_hints_command_external raw;
3274
3275 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3276 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3277 return FALSE;
3278
3279 cmd->offset = bfd_get_32 (abfd, raw.offset);
3280 cmd->nhints = bfd_get_32 (abfd, raw.nhints);
3281 return TRUE;
3282 }
3283
3284 static bfd_boolean
3285 bfd_mach_o_read_fvmlib (bfd *abfd, bfd_mach_o_load_command *command)
3286 {
3287 bfd_mach_o_fvmlib_command *fvm = &command->command.fvmlib;
3288 struct mach_o_fvmlib_command_external raw;
3289 unsigned int nameoff;
3290
3291 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3292 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3293 return FALSE;
3294
3295 nameoff = bfd_h_get_32 (abfd, raw.name);
3296 fvm->minor_version = bfd_h_get_32 (abfd, raw.minor_version);
3297 fvm->header_addr = bfd_h_get_32 (abfd, raw.header_addr);
3298
3299 fvm->name_offset = command->offset + nameoff;
3300 fvm->name_len = command->len - nameoff;
3301 fvm->name_str = bfd_alloc (abfd, fvm->name_len);
3302 if (fvm->name_str == NULL)
3303 return FALSE;
3304 if (bfd_seek (abfd, fvm->name_offset, SEEK_SET) != 0
3305 || bfd_bread (fvm->name_str, fvm->name_len, abfd) != fvm->name_len)
3306 return FALSE;
3307 return TRUE;
3308 }
3309
3310 static bfd_boolean
3311 bfd_mach_o_read_thread (bfd *abfd, bfd_mach_o_load_command *command)
3312 {
3313 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3314 bfd_mach_o_thread_command *cmd = &command->command.thread;
3315 unsigned int offset;
3316 unsigned int nflavours;
3317 unsigned int i;
3318
3319 BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD)
3320 || (command->type == BFD_MACH_O_LC_UNIXTHREAD));
3321
3322 /* Count the number of threads. */
3323 offset = 8;
3324 nflavours = 0;
3325 while (offset != command->len)
3326 {
3327 struct mach_o_thread_command_external raw;
3328
3329 if (offset >= command->len)
3330 return FALSE;
3331
3332 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
3333 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3334 return FALSE;
3335
3336 offset += sizeof (raw) + bfd_h_get_32 (abfd, raw.count) * 4;
3337 nflavours++;
3338 }
3339
3340 /* Allocate threads. */
3341 cmd->flavours = bfd_alloc
3342 (abfd, nflavours * sizeof (bfd_mach_o_thread_flavour));
3343 if (cmd->flavours == NULL)
3344 return FALSE;
3345 cmd->nflavours = nflavours;
3346
3347 offset = 8;
3348 nflavours = 0;
3349 while (offset != command->len)
3350 {
3351 struct mach_o_thread_command_external raw;
3352
3353 if (offset >= command->len)
3354 return FALSE;
3355
3356 if (nflavours >= cmd->nflavours)
3357 return FALSE;
3358
3359 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
3360 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3361 return FALSE;
3362
3363 cmd->flavours[nflavours].flavour = bfd_h_get_32 (abfd, raw.flavour);
3364 cmd->flavours[nflavours].offset = command->offset + offset + sizeof (raw);
3365 cmd->flavours[nflavours].size = bfd_h_get_32 (abfd, raw.count) * 4;
3366 offset += cmd->flavours[nflavours].size + sizeof (raw);
3367 nflavours++;
3368 }
3369
3370 for (i = 0; i < nflavours; i++)
3371 {
3372 asection *bfdsec;
3373 unsigned int snamelen;
3374 char *sname;
3375 const char *flavourstr;
3376 const char *prefix = "LC_THREAD";
3377 unsigned int j = 0;
3378
3379 switch (mdata->header.cputype)
3380 {
3381 case BFD_MACH_O_CPU_TYPE_POWERPC:
3382 case BFD_MACH_O_CPU_TYPE_POWERPC_64:
3383 flavourstr =
3384 bfd_mach_o_ppc_flavour_string (cmd->flavours[i].flavour);
3385 break;
3386 case BFD_MACH_O_CPU_TYPE_I386:
3387 case BFD_MACH_O_CPU_TYPE_X86_64:
3388 flavourstr =
3389 bfd_mach_o_i386_flavour_string (cmd->flavours[i].flavour);
3390 break;
3391 default:
3392 flavourstr = "UNKNOWN_ARCHITECTURE";
3393 break;
3394 }
3395
3396 snamelen = strlen (prefix) + 1 + 20 + 1 + strlen (flavourstr) + 1;
3397 sname = bfd_alloc (abfd, snamelen);
3398 if (sname == NULL)
3399 return FALSE;
3400
3401 for (;;)
3402 {
3403 sprintf (sname, "%s.%s.%u", prefix, flavourstr, j);
3404 if (bfd_get_section_by_name (abfd, sname) == NULL)
3405 break;
3406 j++;
3407 }
3408
3409 bfdsec = bfd_make_section_with_flags (abfd, sname, SEC_HAS_CONTENTS);
3410
3411 bfdsec->vma = 0;
3412 bfdsec->lma = 0;
3413 bfdsec->size = cmd->flavours[i].size;
3414 bfdsec->filepos = cmd->flavours[i].offset;
3415 bfdsec->alignment_power = 0x0;
3416
3417 cmd->section = bfdsec;
3418 }
3419
3420 return TRUE;
3421 }
3422
3423 static bfd_boolean
3424 bfd_mach_o_read_dysymtab (bfd *abfd, bfd_mach_o_load_command *command)
3425 {
3426 bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab;
3427 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3428
3429 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB);
3430
3431 {
3432 struct mach_o_dysymtab_command_external raw;
3433
3434 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3435 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3436 return FALSE;
3437
3438 cmd->ilocalsym = bfd_h_get_32 (abfd, raw.ilocalsym);
3439 cmd->nlocalsym = bfd_h_get_32 (abfd, raw.nlocalsym);
3440 cmd->iextdefsym = bfd_h_get_32 (abfd, raw.iextdefsym);
3441 cmd->nextdefsym = bfd_h_get_32 (abfd, raw.nextdefsym);
3442 cmd->iundefsym = bfd_h_get_32 (abfd, raw.iundefsym);
3443 cmd->nundefsym = bfd_h_get_32 (abfd, raw.nundefsym);
3444 cmd->tocoff = bfd_h_get_32 (abfd, raw.tocoff);
3445 cmd->ntoc = bfd_h_get_32 (abfd, raw.ntoc);
3446 cmd->modtaboff = bfd_h_get_32 (abfd, raw.modtaboff);
3447 cmd->nmodtab = bfd_h_get_32 (abfd, raw.nmodtab);
3448 cmd->extrefsymoff = bfd_h_get_32 (abfd, raw.extrefsymoff);
3449 cmd->nextrefsyms = bfd_h_get_32 (abfd, raw.nextrefsyms);
3450 cmd->indirectsymoff = bfd_h_get_32 (abfd, raw.indirectsymoff);
3451 cmd->nindirectsyms = bfd_h_get_32 (abfd, raw.nindirectsyms);
3452 cmd->extreloff = bfd_h_get_32 (abfd, raw.extreloff);
3453 cmd->nextrel = bfd_h_get_32 (abfd, raw.nextrel);
3454 cmd->locreloff = bfd_h_get_32 (abfd, raw.locreloff);
3455 cmd->nlocrel = bfd_h_get_32 (abfd, raw.nlocrel);
3456 }
3457
3458 if (cmd->nmodtab != 0)
3459 {
3460 unsigned int i;
3461 int wide = bfd_mach_o_wide_p (abfd);
3462 unsigned int module_len = wide ? 56 : 52;
3463
3464 cmd->dylib_module =
3465 bfd_alloc (abfd, cmd->nmodtab * sizeof (bfd_mach_o_dylib_module));
3466 if (cmd->dylib_module == NULL)
3467 return FALSE;
3468
3469 if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0)
3470 return FALSE;
3471
3472 for (i = 0; i < cmd->nmodtab; i++)
3473 {
3474 bfd_mach_o_dylib_module *module = &cmd->dylib_module[i];
3475 unsigned long v;
3476 unsigned char buf[56];
3477
3478 if (bfd_bread ((void *) buf, module_len, abfd) != module_len)
3479 return FALSE;
3480
3481 module->module_name_idx = bfd_h_get_32 (abfd, buf + 0);
3482 module->iextdefsym = bfd_h_get_32 (abfd, buf + 4);
3483 module->nextdefsym = bfd_h_get_32 (abfd, buf + 8);
3484 module->irefsym = bfd_h_get_32 (abfd, buf + 12);
3485 module->nrefsym = bfd_h_get_32 (abfd, buf + 16);
3486 module->ilocalsym = bfd_h_get_32 (abfd, buf + 20);
3487 module->nlocalsym = bfd_h_get_32 (abfd, buf + 24);
3488 module->iextrel = bfd_h_get_32 (abfd, buf + 28);
3489 module->nextrel = bfd_h_get_32 (abfd, buf + 32);
3490 v = bfd_h_get_32 (abfd, buf +36);
3491 module->iinit = v & 0xffff;
3492 module->iterm = (v >> 16) & 0xffff;
3493 v = bfd_h_get_32 (abfd, buf + 40);
3494 module->ninit = v & 0xffff;
3495 module->nterm = (v >> 16) & 0xffff;
3496 if (wide)
3497 {
3498 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 44);
3499 module->objc_module_info_addr = bfd_h_get_64 (abfd, buf + 48);
3500 }
3501 else
3502 {
3503 module->objc_module_info_addr = bfd_h_get_32 (abfd, buf + 44);
3504 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 48);
3505 }
3506 }
3507 }
3508
3509 if (cmd->ntoc != 0)
3510 {
3511 unsigned int i;
3512
3513 cmd->dylib_toc = bfd_alloc
3514 (abfd, cmd->ntoc * sizeof (bfd_mach_o_dylib_table_of_content));
3515 if (cmd->dylib_toc == NULL)
3516 return FALSE;
3517
3518 if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0)
3519 return FALSE;
3520
3521 for (i = 0; i < cmd->ntoc; i++)
3522 {
3523 struct mach_o_dylib_table_of_contents_external raw;
3524 bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i];
3525
3526 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3527 return FALSE;
3528
3529 toc->symbol_index = bfd_h_get_32 (abfd, raw.symbol_index);
3530 toc->module_index = bfd_h_get_32 (abfd, raw.module_index);
3531 }
3532 }
3533
3534 if (cmd->nindirectsyms != 0)
3535 {
3536 unsigned int i;
3537
3538 cmd->indirect_syms = bfd_alloc
3539 (abfd, cmd->nindirectsyms * sizeof (unsigned int));
3540 if (cmd->indirect_syms == NULL)
3541 return FALSE;
3542
3543 if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0)
3544 return FALSE;
3545
3546 for (i = 0; i < cmd->nindirectsyms; i++)
3547 {
3548 unsigned char raw[4];
3549 unsigned int *is = &cmd->indirect_syms[i];
3550
3551 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw))
3552 return FALSE;
3553
3554 *is = bfd_h_get_32 (abfd, raw);
3555 }
3556 }
3557
3558 if (cmd->nextrefsyms != 0)
3559 {
3560 unsigned long v;
3561 unsigned int i;
3562
3563 cmd->ext_refs = bfd_alloc
3564 (abfd, cmd->nextrefsyms * sizeof (bfd_mach_o_dylib_reference));
3565 if (cmd->ext_refs == NULL)
3566 return FALSE;
3567
3568 if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0)
3569 return FALSE;
3570
3571 for (i = 0; i < cmd->nextrefsyms; i++)
3572 {
3573 unsigned char raw[4];
3574 bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i];
3575
3576 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw))
3577 return FALSE;
3578
3579 /* Fields isym and flags are written as bit-fields, thus we need
3580 a specific processing for endianness. */
3581 v = bfd_h_get_32 (abfd, raw);
3582 if (bfd_big_endian (abfd))
3583 {
3584 ref->isym = (v >> 8) & 0xffffff;
3585 ref->flags = v & 0xff;
3586 }
3587 else
3588 {
3589 ref->isym = v & 0xffffff;
3590 ref->flags = (v >> 24) & 0xff;
3591 }
3592 }
3593 }
3594
3595 if (mdata->dysymtab)
3596 return FALSE;
3597 mdata->dysymtab = cmd;
3598
3599 return TRUE;
3600 }
3601
3602 static bfd_boolean
3603 bfd_mach_o_read_symtab (bfd *abfd, bfd_mach_o_load_command *command)
3604 {
3605 bfd_mach_o_symtab_command *symtab = &command->command.symtab;
3606 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3607 struct mach_o_symtab_command_external raw;
3608
3609 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB);
3610
3611 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3612 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3613 return FALSE;
3614
3615 symtab->symoff = bfd_h_get_32 (abfd, raw.symoff);
3616 symtab->nsyms = bfd_h_get_32 (abfd, raw.nsyms);
3617 symtab->stroff = bfd_h_get_32 (abfd, raw.stroff);
3618 symtab->strsize = bfd_h_get_32 (abfd, raw.strsize);
3619 symtab->symbols = NULL;
3620 symtab->strtab = NULL;
3621
3622 if (symtab->nsyms != 0)
3623 abfd->flags |= HAS_SYMS;
3624
3625 if (mdata->symtab)
3626 return FALSE;
3627 mdata->symtab = symtab;
3628 return TRUE;
3629 }
3630
3631 static bfd_boolean
3632 bfd_mach_o_read_uuid (bfd *abfd, bfd_mach_o_load_command *command)
3633 {
3634 bfd_mach_o_uuid_command *cmd = &command->command.uuid;
3635
3636 BFD_ASSERT (command->type == BFD_MACH_O_LC_UUID);
3637
3638 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3639 || bfd_bread (cmd->uuid, 16, abfd) != 16)
3640 return FALSE;
3641
3642 return TRUE;
3643 }
3644
3645 static bfd_boolean
3646 bfd_mach_o_read_linkedit (bfd *abfd, bfd_mach_o_load_command *command)
3647 {
3648 bfd_mach_o_linkedit_command *cmd = &command->command.linkedit;
3649 struct mach_o_linkedit_data_command_external raw;
3650
3651 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3652 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3653 return FALSE;
3654
3655 cmd->dataoff = bfd_get_32 (abfd, raw.dataoff);
3656 cmd->datasize = bfd_get_32 (abfd, raw.datasize);
3657 return TRUE;
3658 }
3659
3660 static bfd_boolean
3661 bfd_mach_o_read_str (bfd *abfd, bfd_mach_o_load_command *command)
3662 {
3663 bfd_mach_o_str_command *cmd = &command->command.str;
3664 struct mach_o_str_command_external raw;
3665 unsigned long off;
3666
3667 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3668 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3669 return FALSE;
3670
3671 off = bfd_get_32 (abfd, raw.str);
3672 cmd->stroff = command->offset + off;
3673 cmd->str_len = command->len - off;
3674 cmd->str = bfd_alloc (abfd, cmd->str_len);
3675 if (cmd->str == NULL)
3676 return FALSE;
3677 if (bfd_seek (abfd, cmd->stroff, SEEK_SET) != 0
3678 || bfd_bread ((void *) cmd->str, cmd->str_len, abfd) != cmd->str_len)
3679 return FALSE;
3680 return TRUE;
3681 }
3682
3683 static bfd_boolean
3684 bfd_mach_o_read_dyld_info (bfd *abfd, bfd_mach_o_load_command *command)
3685 {
3686 bfd_mach_o_dyld_info_command *cmd = &command->command.dyld_info;
3687 struct mach_o_dyld_info_command_external raw;
3688
3689 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3690 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3691 return FALSE;
3692
3693 cmd->rebase_off = bfd_get_32 (abfd, raw.rebase_off);
3694 cmd->rebase_size = bfd_get_32 (abfd, raw.rebase_size);
3695 cmd->bind_off = bfd_get_32 (abfd, raw.bind_off);
3696 cmd->bind_size = bfd_get_32 (abfd, raw.bind_size);
3697 cmd->weak_bind_off = bfd_get_32 (abfd, raw.weak_bind_off);
3698 cmd->weak_bind_size = bfd_get_32 (abfd, raw.weak_bind_size);
3699 cmd->lazy_bind_off = bfd_get_32 (abfd, raw.lazy_bind_off);
3700 cmd->lazy_bind_size = bfd_get_32 (abfd, raw.lazy_bind_size);
3701 cmd->export_off = bfd_get_32 (abfd, raw.export_off);
3702 cmd->export_size = bfd_get_32 (abfd, raw.export_size);
3703 return TRUE;
3704 }
3705
3706 static bfd_boolean
3707 bfd_mach_o_read_version_min (bfd *abfd, bfd_mach_o_load_command *command)
3708 {
3709 bfd_mach_o_version_min_command *cmd = &command->command.version_min;
3710 struct mach_o_version_min_command_external raw;
3711 unsigned int ver;
3712
3713 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3714 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3715 return FALSE;
3716
3717 ver = bfd_get_32 (abfd, raw.version);
3718 cmd->rel = ver >> 16;
3719 cmd->maj = ver >> 8;
3720 cmd->min = ver;
3721 cmd->reserved = bfd_get_32 (abfd, raw.reserved);
3722 return TRUE;
3723 }
3724
3725 static bfd_boolean
3726 bfd_mach_o_read_encryption_info (bfd *abfd, bfd_mach_o_load_command *command)
3727 {
3728 bfd_mach_o_encryption_info_command *cmd = &command->command.encryption_info;
3729 struct mach_o_encryption_info_command_external raw;
3730
3731 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3732 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3733 return FALSE;
3734
3735 cmd->cryptoff = bfd_get_32 (abfd, raw.cryptoff);
3736 cmd->cryptsize = bfd_get_32 (abfd, raw.cryptsize);
3737 cmd->cryptid = bfd_get_32 (abfd, raw.cryptid);
3738 return TRUE;
3739 }
3740
3741 static bfd_boolean
3742 bfd_mach_o_read_main (bfd *abfd, bfd_mach_o_load_command *command)
3743 {
3744 bfd_mach_o_main_command *cmd = &command->command.main;
3745 struct mach_o_entry_point_command_external raw;
3746
3747 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3748 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3749 return FALSE;
3750
3751 cmd->entryoff = bfd_get_64 (abfd, raw.entryoff);
3752 cmd->stacksize = bfd_get_64 (abfd, raw.stacksize);
3753 return TRUE;
3754 }
3755
3756 static bfd_boolean
3757 bfd_mach_o_read_source_version (bfd *abfd, bfd_mach_o_load_command *command)
3758 {
3759 bfd_mach_o_source_version_command *cmd = &command->command.source_version;
3760 struct mach_o_source_version_command_external raw;
3761 bfd_uint64_t ver;
3762
3763 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3764 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3765 return FALSE;
3766
3767 ver = bfd_get_64 (abfd, raw.version);
3768 /* Note: we use a serie of shift to avoid shift > 32 (for which gcc
3769 generates warnings) in case of the host doesn't support 64 bit
3770 integers. */
3771 cmd->e = ver & 0x3ff;
3772 ver >>= 10;
3773 cmd->d = ver & 0x3ff;
3774 ver >>= 10;
3775 cmd->c = ver & 0x3ff;
3776 ver >>= 10;
3777 cmd->b = ver & 0x3ff;
3778 ver >>= 10;
3779 cmd->a = ver & 0xffffff;
3780 return TRUE;
3781 }
3782
3783 static bfd_boolean
3784 bfd_mach_o_read_segment (bfd *abfd,
3785 bfd_mach_o_load_command *command,
3786 unsigned int wide)
3787 {
3788 bfd_mach_o_segment_command *seg = &command->command.segment;
3789 unsigned long i;
3790
3791 if (wide)
3792 {
3793 struct mach_o_segment_command_64_external raw;
3794
3795 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64);
3796
3797 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3798 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3799 return FALSE;
3800
3801 memcpy (seg->segname, raw.segname, 16);
3802 seg->segname[16] = '\0';
3803
3804 seg->vmaddr = bfd_h_get_64 (abfd, raw.vmaddr);
3805 seg->vmsize = bfd_h_get_64 (abfd, raw.vmsize);
3806 seg->fileoff = bfd_h_get_64 (abfd, raw.fileoff);
3807 seg->filesize = bfd_h_get_64 (abfd, raw.filesize);
3808 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot);
3809 seg->initprot = bfd_h_get_32 (abfd, raw.initprot);
3810 seg->nsects = bfd_h_get_32 (abfd, raw.nsects);
3811 seg->flags = bfd_h_get_32 (abfd, raw.flags);
3812 }
3813 else
3814 {
3815 struct mach_o_segment_command_32_external raw;
3816
3817 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT);
3818
3819 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3820 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3821 return FALSE;
3822
3823 memcpy (seg->segname, raw.segname, 16);
3824 seg->segname[16] = '\0';
3825
3826 seg->vmaddr = bfd_h_get_32 (abfd, raw.vmaddr);
3827 seg->vmsize = bfd_h_get_32 (abfd, raw.vmsize);
3828 seg->fileoff = bfd_h_get_32 (abfd, raw.fileoff);
3829 seg->filesize = bfd_h_get_32 (abfd, raw.filesize);
3830 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot);
3831 seg->initprot = bfd_h_get_32 (abfd, raw.initprot);
3832 seg->nsects = bfd_h_get_32 (abfd, raw.nsects);
3833 seg->flags = bfd_h_get_32 (abfd, raw.flags);
3834 }
3835 seg->sect_head = NULL;
3836 seg->sect_tail = NULL;
3837
3838 for (i = 0; i < seg->nsects; i++)
3839 {
3840 bfd_vma segoff;
3841 asection *sec;
3842
3843 if (wide)
3844 segoff = command->offset + BFD_MACH_O_LC_SEGMENT_64_SIZE
3845 + (i * BFD_MACH_O_SECTION_64_SIZE);
3846 else
3847 segoff = command->offset + BFD_MACH_O_LC_SEGMENT_SIZE
3848 + (i * BFD_MACH_O_SECTION_SIZE);
3849
3850 sec = bfd_mach_o_read_section (abfd, segoff, seg->initprot, wide);
3851 if (sec == NULL)
3852 return FALSE;
3853
3854 bfd_mach_o_append_section_to_segment (seg, sec);
3855 }
3856
3857 return TRUE;
3858 }
3859
3860 static bfd_boolean
3861 bfd_mach_o_read_segment_32 (bfd *abfd, bfd_mach_o_load_command *command)
3862 {
3863 return bfd_mach_o_read_segment (abfd, command, 0);
3864 }
3865
3866 static bfd_boolean
3867 bfd_mach_o_read_segment_64 (bfd *abfd, bfd_mach_o_load_command *command)
3868 {
3869 return bfd_mach_o_read_segment (abfd, command, 1);
3870 }
3871
3872 static bfd_boolean
3873 bfd_mach_o_read_command (bfd *abfd, bfd_mach_o_load_command *command)
3874 {
3875 struct mach_o_load_command_external raw;
3876 unsigned int cmd;
3877
3878 /* Read command type and length. */
3879 if (bfd_seek (abfd, command->offset, SEEK_SET) != 0
3880 || bfd_bread (&raw, BFD_MACH_O_LC_SIZE, abfd) != BFD_MACH_O_LC_SIZE)
3881 return FALSE;
3882
3883 cmd = bfd_h_get_32 (abfd, raw.cmd);
3884 command->type = cmd & ~BFD_MACH_O_LC_REQ_DYLD;
3885 command->type_required = cmd & BFD_MACH_O_LC_REQ_DYLD ? TRUE : FALSE;
3886 command->len = bfd_h_get_32 (abfd, raw.cmdsize);
3887
3888 switch (command->type)
3889 {
3890 case BFD_MACH_O_LC_SEGMENT:
3891 if (!bfd_mach_o_read_segment_32 (abfd, command))
3892 return FALSE;
3893 break;
3894 case BFD_MACH_O_LC_SEGMENT_64:
3895 if (!bfd_mach_o_read_segment_64 (abfd, command))
3896 return FALSE;
3897 break;
3898 case BFD_MACH_O_LC_SYMTAB:
3899 if (!bfd_mach_o_read_symtab (abfd, command))
3900 return FALSE;
3901 break;
3902 case BFD_MACH_O_LC_SYMSEG:
3903 break;
3904 case BFD_MACH_O_LC_THREAD:
3905 case BFD_MACH_O_LC_UNIXTHREAD:
3906 if (!bfd_mach_o_read_thread (abfd, command))
3907 return FALSE;
3908 break;
3909 case BFD_MACH_O_LC_LOAD_DYLINKER:
3910 case BFD_MACH_O_LC_ID_DYLINKER:
3911 case BFD_MACH_O_LC_DYLD_ENVIRONMENT:
3912 if (!bfd_mach_o_read_dylinker (abfd, command))
3913 return FALSE;
3914 break;
3915 case BFD_MACH_O_LC_LOAD_DYLIB:
3916 case BFD_MACH_O_LC_LAZY_LOAD_DYLIB:
3917 case BFD_MACH_O_LC_ID_DYLIB:
3918 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
3919 case BFD_MACH_O_LC_REEXPORT_DYLIB:
3920 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
3921 if (!bfd_mach_o_read_dylib (abfd, command))
3922 return FALSE;
3923 break;
3924 case BFD_MACH_O_LC_PREBOUND_DYLIB:
3925 if (!bfd_mach_o_read_prebound_dylib (abfd, command))
3926 return FALSE;
3927 break;
3928 case BFD_MACH_O_LC_LOADFVMLIB:
3929 case BFD_MACH_O_LC_IDFVMLIB:
3930 if (!bfd_mach_o_read_fvmlib (abfd, command))
3931 return FALSE;
3932 break;
3933 case BFD_MACH_O_LC_IDENT:
3934 case BFD_MACH_O_LC_FVMFILE:
3935 case BFD_MACH_O_LC_PREPAGE:
3936 case BFD_MACH_O_LC_ROUTINES:
3937 case BFD_MACH_O_LC_ROUTINES_64:
3938 break;
3939 case BFD_MACH_O_LC_SUB_FRAMEWORK:
3940 case BFD_MACH_O_LC_SUB_UMBRELLA:
3941 case BFD_MACH_O_LC_SUB_LIBRARY:
3942 case BFD_MACH_O_LC_SUB_CLIENT:
3943 case BFD_MACH_O_LC_RPATH:
3944 if (!bfd_mach_o_read_str (abfd, command))
3945 return FALSE;
3946 break;
3947 case BFD_MACH_O_LC_DYSYMTAB:
3948 if (!bfd_mach_o_read_dysymtab (abfd, command))
3949 return FALSE;
3950 break;
3951 case BFD_MACH_O_LC_PREBIND_CKSUM:
3952 if (!bfd_mach_o_read_prebind_cksum (abfd, command))
3953 return FALSE;
3954 break;
3955 case BFD_MACH_O_LC_TWOLEVEL_HINTS:
3956 if (!bfd_mach_o_read_twolevel_hints (abfd, command))
3957 return FALSE;
3958 break;
3959 case BFD_MACH_O_LC_UUID:
3960 if (!bfd_mach_o_read_uuid (abfd, command))
3961 return FALSE;
3962 break;
3963 case BFD_MACH_O_LC_CODE_SIGNATURE:
3964 case BFD_MACH_O_LC_SEGMENT_SPLIT_INFO:
3965 case BFD_MACH_O_LC_FUNCTION_STARTS:
3966 case BFD_MACH_O_LC_DATA_IN_CODE:
3967 case BFD_MACH_O_LC_DYLIB_CODE_SIGN_DRS:
3968 if (!bfd_mach_o_read_linkedit (abfd, command))
3969 return FALSE;
3970 break;
3971 case BFD_MACH_O_LC_ENCRYPTION_INFO:
3972 if (!bfd_mach_o_read_encryption_info (abfd, command))
3973 return FALSE;
3974 break;
3975 case BFD_MACH_O_LC_DYLD_INFO:
3976 if (!bfd_mach_o_read_dyld_info (abfd, command))
3977 return FALSE;
3978 break;
3979 case BFD_MACH_O_LC_VERSION_MIN_MACOSX:
3980 case BFD_MACH_O_LC_VERSION_MIN_IPHONEOS:
3981 if (!bfd_mach_o_read_version_min (abfd, command))
3982 return FALSE;
3983 break;
3984 case BFD_MACH_O_LC_MAIN:
3985 if (!bfd_mach_o_read_main (abfd, command))
3986 return FALSE;
3987 break;
3988 case BFD_MACH_O_LC_SOURCE_VERSION:
3989 if (!bfd_mach_o_read_source_version (abfd, command))
3990 return FALSE;
3991 break;
3992 default:
3993 (*_bfd_error_handler)(_("%B: unknown load command 0x%lx"),
3994 abfd, (unsigned long) command->type);
3995 break;
3996 }
3997
3998 return TRUE;
3999 }
4000
4001 static void
4002 bfd_mach_o_flatten_sections (bfd *abfd)
4003 {
4004 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4005 long csect = 0;
4006 unsigned long i;
4007
4008 /* Count total number of sections. */
4009 mdata->nsects = 0;
4010
4011 for (i = 0; i < mdata->header.ncmds; i++)
4012 {
4013 if (mdata->commands[i].type == BFD_MACH_O_LC_SEGMENT
4014 || mdata->commands[i].type == BFD_MACH_O_LC_SEGMENT_64)
4015 {
4016 bfd_mach_o_segment_command *seg;
4017
4018 seg = &mdata->commands[i].command.segment;
4019 mdata->nsects += seg->nsects;
4020 }
4021 }
4022
4023 /* Allocate sections array. */
4024 mdata->sections = bfd_alloc (abfd,
4025 mdata->nsects * sizeof (bfd_mach_o_section *));
4026
4027 /* Fill the array. */
4028 csect = 0;
4029
4030 for (i = 0; i < mdata->header.ncmds; i++)
4031 {
4032 if (mdata->commands[i].type == BFD_MACH_O_LC_SEGMENT
4033 || mdata->commands[i].type == BFD_MACH_O_LC_SEGMENT_64)
4034 {
4035 bfd_mach_o_segment_command *seg;
4036 bfd_mach_o_section *sec;
4037
4038 seg = &mdata->commands[i].command.segment;
4039 BFD_ASSERT (csect + seg->nsects <= mdata->nsects);
4040
4041 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
4042 mdata->sections[csect++] = sec;
4043 }
4044 }
4045 }
4046
4047 static bfd_boolean
4048 bfd_mach_o_scan_start_address (bfd *abfd)
4049 {
4050 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4051 bfd_mach_o_thread_command *cmd = NULL;
4052 unsigned long i;
4053
4054 for (i = 0; i < mdata->header.ncmds; i++)
4055 if ((mdata->commands[i].type == BFD_MACH_O_LC_THREAD) ||
4056 (mdata->commands[i].type == BFD_MACH_O_LC_UNIXTHREAD))
4057 {
4058 cmd = &mdata->commands[i].command.thread;
4059 break;
4060 }
4061 else if (mdata->commands[i].type == BFD_MACH_O_LC_MAIN
4062 && mdata->nsects > 1)
4063 {
4064 bfd_mach_o_main_command *main_cmd = &mdata->commands[i].command.main;
4065 bfd_mach_o_section *text_sect = mdata->sections[0];
4066 if (text_sect)
4067 {
4068 abfd->start_address = main_cmd->entryoff
4069 + (text_sect->addr - text_sect->offset);
4070 return TRUE;
4071 }
4072 }
4073
4074 /* An object file has no start address, so do not fail if not found. */
4075 if (cmd == NULL)
4076 return TRUE;
4077
4078 /* FIXME: create a subtarget hook ? */
4079 for (i = 0; i < cmd->nflavours; i++)
4080 {
4081 if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_I386)
4082 && (cmd->flavours[i].flavour
4083 == (unsigned long) BFD_MACH_O_x86_THREAD_STATE32))
4084 {
4085 unsigned char buf[4];
4086
4087 if (bfd_seek (abfd, cmd->flavours[i].offset + 40, SEEK_SET) != 0
4088 || bfd_bread (buf, 4, abfd) != 4)
4089 return FALSE;
4090
4091 abfd->start_address = bfd_h_get_32 (abfd, buf);
4092 }
4093 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC)
4094 && (cmd->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE))
4095 {
4096 unsigned char buf[4];
4097
4098 if (bfd_seek (abfd, cmd->flavours[i].offset + 0, SEEK_SET) != 0
4099 || bfd_bread (buf, 4, abfd) != 4)
4100 return FALSE;
4101
4102 abfd->start_address = bfd_h_get_32 (abfd, buf);
4103 }
4104 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC_64)
4105 && (cmd->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE64))
4106 {
4107 unsigned char buf[8];
4108
4109 if (bfd_seek (abfd, cmd->flavours[i].offset + 0, SEEK_SET) != 0
4110 || bfd_bread (buf, 8, abfd) != 8)
4111 return FALSE;
4112
4113 abfd->start_address = bfd_h_get_64 (abfd, buf);
4114 }
4115 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_X86_64)
4116 && (cmd->flavours[i].flavour == BFD_MACH_O_x86_THREAD_STATE64))
4117 {
4118 unsigned char buf[8];
4119
4120 if (bfd_seek (abfd, cmd->flavours[i].offset + (16 * 8), SEEK_SET) != 0
4121 || bfd_bread (buf, 8, abfd) != 8)
4122 return FALSE;
4123
4124 abfd->start_address = bfd_h_get_64 (abfd, buf);
4125 }
4126 }
4127
4128 return TRUE;
4129 }
4130
4131 bfd_boolean
4132 bfd_mach_o_set_arch_mach (bfd *abfd,
4133 enum bfd_architecture arch,
4134 unsigned long machine)
4135 {
4136 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
4137
4138 /* If this isn't the right architecture for this backend, and this
4139 isn't the generic backend, fail. */
4140 if (arch != bed->arch
4141 && arch != bfd_arch_unknown
4142 && bed->arch != bfd_arch_unknown)
4143 return FALSE;
4144
4145 return bfd_default_set_arch_mach (abfd, arch, machine);
4146 }
4147
4148 static bfd_boolean
4149 bfd_mach_o_scan (bfd *abfd,
4150 bfd_mach_o_header *header,
4151 bfd_mach_o_data_struct *mdata)
4152 {
4153 unsigned int i;
4154 enum bfd_architecture cputype;
4155 unsigned long cpusubtype;
4156 unsigned int hdrsize;
4157
4158 hdrsize = mach_o_wide_p (header) ?
4159 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
4160
4161 mdata->header = *header;
4162
4163 abfd->flags = abfd->flags & BFD_IN_MEMORY;
4164 switch (header->filetype)
4165 {
4166 case BFD_MACH_O_MH_OBJECT:
4167 abfd->flags |= HAS_RELOC;
4168 break;
4169 case BFD_MACH_O_MH_EXECUTE:
4170 abfd->flags |= EXEC_P;
4171 break;
4172 case BFD_MACH_O_MH_DYLIB:
4173 case BFD_MACH_O_MH_BUNDLE:
4174 abfd->flags |= DYNAMIC;
4175 break;
4176 }
4177
4178 abfd->tdata.mach_o_data = mdata;
4179
4180 bfd_mach_o_convert_architecture (header->cputype, header->cpusubtype,
4181 &cputype, &cpusubtype);
4182 if (cputype == bfd_arch_unknown)
4183 {
4184 (*_bfd_error_handler)
4185 (_("bfd_mach_o_scan: unknown architecture 0x%lx/0x%lx"),
4186 header->cputype, header->cpusubtype);
4187 return FALSE;
4188 }
4189
4190 bfd_set_arch_mach (abfd, cputype, cpusubtype);
4191
4192 if (header->ncmds != 0)
4193 {
4194 mdata->commands = bfd_alloc
4195 (abfd, header->ncmds * sizeof (bfd_mach_o_load_command));
4196 if (mdata->commands == NULL)
4197 return FALSE;
4198
4199 for (i = 0; i < header->ncmds; i++)
4200 {
4201 bfd_mach_o_load_command *cur = &mdata->commands[i];
4202
4203 if (i == 0)
4204 cur->offset = hdrsize;
4205 else
4206 {
4207 bfd_mach_o_load_command *prev = &mdata->commands[i - 1];
4208 cur->offset = prev->offset + prev->len;
4209 }
4210
4211 if (!bfd_mach_o_read_command (abfd, cur))
4212 return FALSE;
4213 }
4214 }
4215
4216 /* Sections should be flatten before scanning start address. */
4217 bfd_mach_o_flatten_sections (abfd);
4218 if (!bfd_mach_o_scan_start_address (abfd))
4219 return FALSE;
4220
4221 return TRUE;
4222 }
4223
4224 bfd_boolean
4225 bfd_mach_o_mkobject_init (bfd *abfd)
4226 {
4227 bfd_mach_o_data_struct *mdata = NULL;
4228
4229 mdata = bfd_zalloc (abfd, sizeof (bfd_mach_o_data_struct));
4230 if (mdata == NULL)
4231 return FALSE;
4232 abfd->tdata.mach_o_data = mdata;
4233
4234 mdata->header.magic = 0;
4235 mdata->header.cputype = 0;
4236 mdata->header.cpusubtype = 0;
4237 mdata->header.filetype = 0;
4238 mdata->header.ncmds = 0;
4239 mdata->header.sizeofcmds = 0;
4240 mdata->header.flags = 0;
4241 mdata->header.byteorder = BFD_ENDIAN_UNKNOWN;
4242 mdata->commands = NULL;
4243 mdata->nsects = 0;
4244 mdata->sections = NULL;
4245 mdata->dyn_reloc_cache = NULL;
4246
4247 return TRUE;
4248 }
4249
4250 static bfd_boolean
4251 bfd_mach_o_gen_mkobject (bfd *abfd)
4252 {
4253 bfd_mach_o_data_struct *mdata;
4254
4255 if (!bfd_mach_o_mkobject_init (abfd))
4256 return FALSE;
4257
4258 mdata = bfd_mach_o_get_data (abfd);
4259 mdata->header.magic = BFD_MACH_O_MH_MAGIC;
4260 mdata->header.cputype = 0;
4261 mdata->header.cpusubtype = 0;
4262 mdata->header.byteorder = abfd->xvec->byteorder;
4263 mdata->header.version = 1;
4264
4265 return TRUE;
4266 }
4267
4268 const bfd_target *
4269 bfd_mach_o_header_p (bfd *abfd,
4270 bfd_mach_o_filetype filetype,
4271 bfd_mach_o_cpu_type cputype)
4272 {
4273 bfd_mach_o_header header;
4274 bfd_mach_o_data_struct *mdata;
4275
4276 if (!bfd_mach_o_read_header (abfd, &header))
4277 goto wrong;
4278
4279 if (! (header.byteorder == BFD_ENDIAN_BIG
4280 || header.byteorder == BFD_ENDIAN_LITTLE))
4281 {
4282 (*_bfd_error_handler) (_("unknown header byte-order value 0x%lx"),
4283 (unsigned long) header.byteorder);
4284 goto wrong;
4285 }
4286
4287 if (! ((header.byteorder == BFD_ENDIAN_BIG
4288 && abfd->xvec->byteorder == BFD_ENDIAN_BIG
4289 && abfd->xvec->header_byteorder == BFD_ENDIAN_BIG)
4290 || (header.byteorder == BFD_ENDIAN_LITTLE
4291 && abfd->xvec->byteorder == BFD_ENDIAN_LITTLE
4292 && abfd->xvec->header_byteorder == BFD_ENDIAN_LITTLE)))
4293 goto wrong;
4294
4295 /* Check cputype and filetype.
4296 In case of wildcard, do not accept magics that are handled by existing
4297 targets. */
4298 if (cputype)
4299 {
4300 if (header.cputype != cputype)
4301 goto wrong;
4302 }
4303 else
4304 {
4305 #ifndef BFD64
4306 /* Do not recognize 64 architectures if not configured for 64bit targets.
4307 This could happen only for generic targets. */
4308 if (mach_o_wide_p (&header))
4309 goto wrong;
4310 #endif
4311 }
4312
4313 if (filetype)
4314 {
4315 if (header.filetype != filetype)
4316 goto wrong;
4317 }
4318 else
4319 {
4320 switch (header.filetype)
4321 {
4322 case BFD_MACH_O_MH_CORE:
4323 /* Handled by core_p */
4324 goto wrong;
4325 default:
4326 break;
4327 }
4328 }
4329
4330 mdata = (bfd_mach_o_data_struct *) bfd_zalloc (abfd, sizeof (*mdata));
4331 if (mdata == NULL)
4332 goto fail;
4333
4334 if (!bfd_mach_o_scan (abfd, &header, mdata))
4335 goto wrong;
4336
4337 return abfd->xvec;
4338
4339 wrong:
4340 bfd_set_error (bfd_error_wrong_format);
4341
4342 fail:
4343 return NULL;
4344 }
4345
4346 static const bfd_target *
4347 bfd_mach_o_gen_object_p (bfd *abfd)
4348 {
4349 return bfd_mach_o_header_p (abfd, 0, 0);
4350 }
4351
4352 static const bfd_target *
4353 bfd_mach_o_gen_core_p (bfd *abfd)
4354 {
4355 return bfd_mach_o_header_p (abfd, BFD_MACH_O_MH_CORE, 0);
4356 }
4357
4358 /* Return the base address of ABFD, ie the address at which the image is
4359 mapped. The possible initial pagezero is ignored. */
4360
4361 bfd_vma
4362 bfd_mach_o_get_base_address (bfd *abfd)
4363 {
4364 bfd_mach_o_data_struct *mdata;
4365 unsigned int i;
4366
4367 /* Check for Mach-O. */
4368 if (!bfd_mach_o_valid (abfd))
4369 return 0;
4370 mdata = bfd_mach_o_get_data (abfd);
4371
4372 for (i = 0; i < mdata->header.ncmds; i++)
4373 {
4374 bfd_mach_o_load_command *cmd = &mdata->commands[i];
4375 if ((cmd->type == BFD_MACH_O_LC_SEGMENT
4376 || cmd->type == BFD_MACH_O_LC_SEGMENT_64))
4377 {
4378 struct bfd_mach_o_segment_command *segcmd = &cmd->command.segment;
4379
4380 if (segcmd->initprot != 0)
4381 return segcmd->vmaddr;
4382 }
4383 }
4384 return 0;
4385 }
4386
4387 typedef struct mach_o_fat_archentry
4388 {
4389 unsigned long cputype;
4390 unsigned long cpusubtype;
4391 unsigned long offset;
4392 unsigned long size;
4393 unsigned long align;
4394 } mach_o_fat_archentry;
4395
4396 typedef struct mach_o_fat_data_struct
4397 {
4398 unsigned long magic;
4399 unsigned long nfat_arch;
4400 mach_o_fat_archentry *archentries;
4401 } mach_o_fat_data_struct;
4402
4403 const bfd_target *
4404 bfd_mach_o_archive_p (bfd *abfd)
4405 {
4406 mach_o_fat_data_struct *adata = NULL;
4407 struct mach_o_fat_header_external hdr;
4408 unsigned long i;
4409
4410 if (bfd_seek (abfd, 0, SEEK_SET) != 0
4411 || bfd_bread (&hdr, sizeof (hdr), abfd) != sizeof (hdr))
4412 goto error;
4413
4414 adata = bfd_alloc (abfd, sizeof (mach_o_fat_data_struct));
4415 if (adata == NULL)
4416 goto error;
4417
4418 adata->magic = bfd_getb32 (hdr.magic);
4419 adata->nfat_arch = bfd_getb32 (hdr.nfat_arch);
4420 if (adata->magic != 0xcafebabe)
4421 goto error;
4422 /* Avoid matching Java bytecode files, which have the same magic number.
4423 In the Java bytecode file format this field contains the JVM version,
4424 which starts at 43.0. */
4425 if (adata->nfat_arch > 30)
4426 goto error;
4427
4428 adata->archentries =
4429 bfd_alloc (abfd, adata->nfat_arch * sizeof (mach_o_fat_archentry));
4430 if (adata->archentries == NULL)
4431 goto error;
4432
4433 for (i = 0; i < adata->nfat_arch; i++)
4434 {
4435 struct mach_o_fat_arch_external arch;
4436 if (bfd_bread (&arch, sizeof (arch), abfd) != sizeof (arch))
4437 goto error;
4438 adata->archentries[i].cputype = bfd_getb32 (arch.cputype);
4439 adata->archentries[i].cpusubtype = bfd_getb32 (arch.cpusubtype);
4440 adata->archentries[i].offset = bfd_getb32 (arch.offset);
4441 adata->archentries[i].size = bfd_getb32 (arch.size);
4442 adata->archentries[i].align = bfd_getb32 (arch.align);
4443 }
4444
4445 abfd->tdata.mach_o_fat_data = adata;
4446 return abfd->xvec;
4447
4448 error:
4449 if (adata != NULL)
4450 bfd_release (abfd, adata);
4451 bfd_set_error (bfd_error_wrong_format);
4452 return NULL;
4453 }
4454
4455 /* Set the filename for a fat binary member ABFD, whose bfd architecture is
4456 ARCH_TYPE/ARCH_SUBTYPE and corresponding entry in header is ENTRY.
4457 Set arelt_data and origin fields too. */
4458
4459 static void
4460 bfd_mach_o_fat_member_init (bfd *abfd,
4461 enum bfd_architecture arch_type,
4462 unsigned long arch_subtype,
4463 mach_o_fat_archentry *entry)
4464 {
4465 struct areltdata *areltdata;
4466 /* Create the member filename. Use ARCH_NAME. */
4467 const bfd_arch_info_type *ap = bfd_lookup_arch (arch_type, arch_subtype);
4468
4469 if (ap)
4470 {
4471 /* Use the architecture name if known. */
4472 abfd->filename = xstrdup (ap->printable_name);
4473 }
4474 else
4475 {
4476 /* Forge a uniq id. */
4477 const size_t namelen = 2 + 8 + 1 + 2 + 8 + 1;
4478 char *name = xmalloc (namelen);
4479 snprintf (name, namelen, "0x%lx-0x%lx",
4480 entry->cputype, entry->cpusubtype);
4481 abfd->filename = name;
4482 }
4483
4484 areltdata = bfd_zmalloc (sizeof (struct areltdata));
4485 areltdata->parsed_size = entry->size;
4486 abfd->arelt_data = areltdata;
4487 abfd->iostream = NULL;
4488 abfd->origin = entry->offset;
4489 }
4490
4491 bfd *
4492 bfd_mach_o_openr_next_archived_file (bfd *archive, bfd *prev)
4493 {
4494 mach_o_fat_data_struct *adata;
4495 mach_o_fat_archentry *entry = NULL;
4496 unsigned long i;
4497 bfd *nbfd;
4498 enum bfd_architecture arch_type;
4499 unsigned long arch_subtype;
4500
4501 adata = (mach_o_fat_data_struct *) archive->tdata.mach_o_fat_data;
4502 BFD_ASSERT (adata != NULL);
4503
4504 /* Find index of previous entry. */
4505 if (prev == NULL)
4506 {
4507 /* Start at first one. */
4508 i = 0;
4509 }
4510 else
4511 {
4512 /* Find index of PREV. */
4513 for (i = 0; i < adata->nfat_arch; i++)
4514 {
4515 if (adata->archentries[i].offset == prev->origin)
4516 break;
4517 }
4518
4519 if (i == adata->nfat_arch)
4520 {
4521 /* Not found. */
4522 bfd_set_error (bfd_error_bad_value);
4523 return NULL;
4524 }
4525
4526 /* Get next entry. */
4527 i++;
4528 }
4529
4530 if (i >= adata->nfat_arch)
4531 {
4532 bfd_set_error (bfd_error_no_more_archived_files);
4533 return NULL;
4534 }
4535
4536 entry = &adata->archentries[i];
4537 nbfd = _bfd_new_bfd_contained_in (archive);
4538 if (nbfd == NULL)
4539 return NULL;
4540
4541 bfd_mach_o_convert_architecture (entry->cputype, entry->cpusubtype,
4542 &arch_type, &arch_subtype);
4543
4544 bfd_mach_o_fat_member_init (nbfd, arch_type, arch_subtype, entry);
4545
4546 bfd_set_arch_mach (nbfd, arch_type, arch_subtype);
4547
4548 return nbfd;
4549 }
4550
4551 /* Analogous to stat call. */
4552
4553 static int
4554 bfd_mach_o_fat_stat_arch_elt (bfd *abfd, struct stat *buf)
4555 {
4556 if (abfd->arelt_data == NULL)
4557 {
4558 bfd_set_error (bfd_error_invalid_operation);
4559 return -1;
4560 }
4561
4562 buf->st_mtime = 0;
4563 buf->st_uid = 0;
4564 buf->st_gid = 0;
4565 buf->st_mode = 0644;
4566 buf->st_size = arelt_size (abfd);
4567
4568 return 0;
4569 }
4570
4571 /* If ABFD format is FORMAT and architecture is ARCH, return it.
4572 If ABFD is a fat image containing a member that corresponds to FORMAT
4573 and ARCH, returns it.
4574 In other case, returns NULL.
4575 This function allows transparent uses of fat images. */
4576
4577 bfd *
4578 bfd_mach_o_fat_extract (bfd *abfd,
4579 bfd_format format,
4580 const bfd_arch_info_type *arch)
4581 {
4582 bfd *res;
4583 mach_o_fat_data_struct *adata;
4584 unsigned int i;
4585
4586 if (bfd_check_format (abfd, format))
4587 {
4588 if (bfd_get_arch_info (abfd) == arch)
4589 return abfd;
4590 return NULL;
4591 }
4592 if (!bfd_check_format (abfd, bfd_archive)
4593 || abfd->xvec != &mach_o_fat_vec)
4594 return NULL;
4595
4596 /* This is a Mach-O fat image. */
4597 adata = (mach_o_fat_data_struct *) abfd->tdata.mach_o_fat_data;
4598 BFD_ASSERT (adata != NULL);
4599
4600 for (i = 0; i < adata->nfat_arch; i++)
4601 {
4602 struct mach_o_fat_archentry *e = &adata->archentries[i];
4603 enum bfd_architecture cpu_type;
4604 unsigned long cpu_subtype;
4605
4606 bfd_mach_o_convert_architecture (e->cputype, e->cpusubtype,
4607 &cpu_type, &cpu_subtype);
4608 if (cpu_type != arch->arch || cpu_subtype != arch->mach)
4609 continue;
4610
4611 /* The architecture is found. */
4612 res = _bfd_new_bfd_contained_in (abfd);
4613 if (res == NULL)
4614 return NULL;
4615
4616 bfd_mach_o_fat_member_init (res, cpu_type, cpu_subtype, e);
4617
4618 if (bfd_check_format (res, format))
4619 {
4620 BFD_ASSERT (bfd_get_arch_info (res) == arch);
4621 return res;
4622 }
4623 bfd_close (res);
4624 return NULL;
4625 }
4626
4627 return NULL;
4628 }
4629
4630 int
4631 bfd_mach_o_lookup_command (bfd *abfd,
4632 bfd_mach_o_load_command_type type,
4633 bfd_mach_o_load_command **mcommand)
4634 {
4635 struct mach_o_data_struct *md = bfd_mach_o_get_data (abfd);
4636 bfd_mach_o_load_command *ncmd = NULL;
4637 unsigned int i, num;
4638
4639 BFD_ASSERT (md != NULL);
4640 BFD_ASSERT (mcommand != NULL);
4641
4642 num = 0;
4643 for (i = 0; i < md->header.ncmds; i++)
4644 {
4645 struct bfd_mach_o_load_command *cmd = &md->commands[i];
4646
4647 if (cmd->type != type)
4648 continue;
4649
4650 if (num == 0)
4651 ncmd = cmd;
4652 num++;
4653 }
4654
4655 *mcommand = ncmd;
4656 return num;
4657 }
4658
4659 unsigned long
4660 bfd_mach_o_stack_addr (enum bfd_mach_o_cpu_type type)
4661 {
4662 switch (type)
4663 {
4664 case BFD_MACH_O_CPU_TYPE_MC680x0:
4665 return 0x04000000;
4666 case BFD_MACH_O_CPU_TYPE_MC88000:
4667 return 0xffffe000;
4668 case BFD_MACH_O_CPU_TYPE_POWERPC:
4669 return 0xc0000000;
4670 case BFD_MACH_O_CPU_TYPE_I386:
4671 return 0xc0000000;
4672 case BFD_MACH_O_CPU_TYPE_SPARC:
4673 return 0xf0000000;
4674 case BFD_MACH_O_CPU_TYPE_I860:
4675 return 0;
4676 case BFD_MACH_O_CPU_TYPE_HPPA:
4677 return 0xc0000000 - 0x04000000;
4678 default:
4679 return 0;
4680 }
4681 }
4682
4683 /* The following two tables should be kept, as far as possible, in order of
4684 most frequently used entries to optimize their use from gas. */
4685
4686 const bfd_mach_o_xlat_name bfd_mach_o_section_type_name[] =
4687 {
4688 { "regular", BFD_MACH_O_S_REGULAR},
4689 { "coalesced", BFD_MACH_O_S_COALESCED},
4690 { "zerofill", BFD_MACH_O_S_ZEROFILL},
4691 { "cstring_literals", BFD_MACH_O_S_CSTRING_LITERALS},
4692 { "4byte_literals", BFD_MACH_O_S_4BYTE_LITERALS},
4693 { "8byte_literals", BFD_MACH_O_S_8BYTE_LITERALS},
4694 { "16byte_literals", BFD_MACH_O_S_16BYTE_LITERALS},
4695 { "literal_pointers", BFD_MACH_O_S_LITERAL_POINTERS},
4696 { "mod_init_func_pointers", BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS},
4697 { "mod_fini_func_pointers", BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS},
4698 { "gb_zerofill", BFD_MACH_O_S_GB_ZEROFILL},
4699 { "interposing", BFD_MACH_O_S_INTERPOSING},
4700 { "dtrace_dof", BFD_MACH_O_S_DTRACE_DOF},
4701 { "non_lazy_symbol_pointers", BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS},
4702 { "lazy_symbol_pointers", BFD_MACH_O_S_LAZY_SYMBOL_POINTERS},
4703 { "symbol_stubs", BFD_MACH_O_S_SYMBOL_STUBS},
4704 { "lazy_dylib_symbol_pointers", BFD_MACH_O_S_LAZY_DYLIB_SYMBOL_POINTERS},
4705 { NULL, 0}
4706 };
4707
4708 const bfd_mach_o_xlat_name bfd_mach_o_section_attribute_name[] =
4709 {
4710 { "pure_instructions", BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS },
4711 { "some_instructions", BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS },
4712 { "loc_reloc", BFD_MACH_O_S_ATTR_LOC_RELOC },
4713 { "ext_reloc", BFD_MACH_O_S_ATTR_EXT_RELOC },
4714 { "debug", BFD_MACH_O_S_ATTR_DEBUG },
4715 { "live_support", BFD_MACH_O_S_ATTR_LIVE_SUPPORT },
4716 { "no_dead_strip", BFD_MACH_O_S_ATTR_NO_DEAD_STRIP },
4717 { "strip_static_syms", BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS },
4718 { "no_toc", BFD_MACH_O_S_ATTR_NO_TOC },
4719 { "self_modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
4720 { "modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
4721 { NULL, 0}
4722 };
4723
4724 /* Get the section type from NAME. Return 256 if NAME is unknown. */
4725
4726 unsigned int
4727 bfd_mach_o_get_section_type_from_name (bfd *abfd, const char *name)
4728 {
4729 const bfd_mach_o_xlat_name *x;
4730 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
4731
4732 for (x = bfd_mach_o_section_type_name; x->name; x++)
4733 if (strcmp (x->name, name) == 0)
4734 {
4735 /* We found it... does the target support it? */
4736 if (bed->bfd_mach_o_section_type_valid_for_target == NULL
4737 || bed->bfd_mach_o_section_type_valid_for_target (x->val))
4738 return x->val; /* OK. */
4739 else
4740 break; /* Not supported. */
4741 }
4742 /* Maximum section ID = 0xff. */
4743 return 256;
4744 }
4745
4746 /* Get the section attribute from NAME. Return -1 if NAME is unknown. */
4747
4748 unsigned int
4749 bfd_mach_o_get_section_attribute_from_name (const char *name)
4750 {
4751 const bfd_mach_o_xlat_name *x;
4752
4753 for (x = bfd_mach_o_section_attribute_name; x->name; x++)
4754 if (strcmp (x->name, name) == 0)
4755 return x->val;
4756 return (unsigned int)-1;
4757 }
4758
4759 int
4760 bfd_mach_o_core_fetch_environment (bfd *abfd,
4761 unsigned char **rbuf,
4762 unsigned int *rlen)
4763 {
4764 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4765 unsigned long stackaddr = bfd_mach_o_stack_addr (mdata->header.cputype);
4766 unsigned int i = 0;
4767
4768 for (i = 0; i < mdata->header.ncmds; i++)
4769 {
4770 bfd_mach_o_load_command *cur = &mdata->commands[i];
4771 bfd_mach_o_segment_command *seg = NULL;
4772
4773 if (cur->type != BFD_MACH_O_LC_SEGMENT)
4774 continue;
4775
4776 seg = &cur->command.segment;
4777
4778 if ((seg->vmaddr + seg->vmsize) == stackaddr)
4779 {
4780 unsigned long start = seg->fileoff;
4781 unsigned long end = seg->fileoff + seg->filesize;
4782 unsigned char *buf = bfd_malloc (1024);
4783 unsigned long size = 1024;
4784
4785 for (;;)
4786 {
4787 bfd_size_type nread = 0;
4788 unsigned long offset;
4789 int found_nonnull = 0;
4790
4791 if (size > (end - start))
4792 size = (end - start);
4793
4794 buf = bfd_realloc_or_free (buf, size);
4795 if (buf == NULL)
4796 return -1;
4797
4798 if (bfd_seek (abfd, end - size, SEEK_SET) != 0)
4799 {
4800 free (buf);
4801 return -1;
4802 }
4803
4804 nread = bfd_bread (buf, size, abfd);
4805
4806 if (nread != size)
4807 {
4808 free (buf);
4809 return -1;
4810 }
4811
4812 for (offset = 4; offset <= size; offset += 4)
4813 {
4814 unsigned long val;
4815
4816 val = *((unsigned long *) (buf + size - offset));
4817 if (! found_nonnull)
4818 {
4819 if (val != 0)
4820 found_nonnull = 1;
4821 }
4822 else if (val == 0x0)
4823 {
4824 unsigned long bottom;
4825 unsigned long top;
4826
4827 bottom = seg->fileoff + seg->filesize - offset;
4828 top = seg->fileoff + seg->filesize - 4;
4829 *rbuf = bfd_malloc (top - bottom);
4830 *rlen = top - bottom;
4831
4832 memcpy (*rbuf, buf + size - *rlen, *rlen);
4833 free (buf);
4834 return 0;
4835 }
4836 }
4837
4838 if (size == (end - start))
4839 break;
4840
4841 size *= 2;
4842 }
4843
4844 free (buf);
4845 }
4846 }
4847
4848 return -1;
4849 }
4850
4851 char *
4852 bfd_mach_o_core_file_failing_command (bfd *abfd)
4853 {
4854 unsigned char *buf = NULL;
4855 unsigned int len = 0;
4856 int ret;
4857
4858 ret = bfd_mach_o_core_fetch_environment (abfd, &buf, &len);
4859 if (ret < 0)
4860 return NULL;
4861
4862 return (char *) buf;
4863 }
4864
4865 int
4866 bfd_mach_o_core_file_failing_signal (bfd *abfd ATTRIBUTE_UNUSED)
4867 {
4868 return 0;
4869 }
4870
4871 static bfd_mach_o_uuid_command *
4872 bfd_mach_o_lookup_uuid_command (bfd *abfd)
4873 {
4874 bfd_mach_o_load_command *uuid_cmd;
4875 int ncmd = bfd_mach_o_lookup_command (abfd, BFD_MACH_O_LC_UUID, &uuid_cmd);
4876 if (ncmd != 1)
4877 return FALSE;
4878 return &uuid_cmd->command.uuid;
4879 }
4880
4881 /* Return true if ABFD is a dSYM file and its UUID matches UUID_CMD. */
4882
4883 static bfd_boolean
4884 bfd_mach_o_dsym_for_uuid_p (bfd *abfd, const bfd_mach_o_uuid_command *uuid_cmd)
4885 {
4886 bfd_mach_o_uuid_command *dsym_uuid_cmd;
4887
4888 BFD_ASSERT (abfd);
4889 BFD_ASSERT (uuid_cmd);
4890
4891 if (!bfd_check_format (abfd, bfd_object))
4892 return FALSE;
4893
4894 if (bfd_get_flavour (abfd) != bfd_target_mach_o_flavour
4895 || bfd_mach_o_get_data (abfd) == NULL
4896 || bfd_mach_o_get_data (abfd)->header.filetype != BFD_MACH_O_MH_DSYM)
4897 return FALSE;
4898
4899 dsym_uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd);
4900 if (dsym_uuid_cmd == NULL)
4901 return FALSE;
4902
4903 if (memcmp (uuid_cmd->uuid, dsym_uuid_cmd->uuid,
4904 sizeof (uuid_cmd->uuid)) != 0)
4905 return FALSE;
4906
4907 return TRUE;
4908 }
4909
4910 /* Find a BFD in DSYM_FILENAME which matches ARCH and UUID_CMD.
4911 The caller is responsible for closing the returned BFD object and
4912 its my_archive if the returned BFD is in a fat dSYM. */
4913
4914 static bfd *
4915 bfd_mach_o_find_dsym (const char *dsym_filename,
4916 const bfd_mach_o_uuid_command *uuid_cmd,
4917 const bfd_arch_info_type *arch)
4918 {
4919 bfd *base_dsym_bfd, *dsym_bfd;
4920
4921 BFD_ASSERT (uuid_cmd);
4922
4923 base_dsym_bfd = bfd_openr (dsym_filename, NULL);
4924 if (base_dsym_bfd == NULL)
4925 return NULL;
4926
4927 dsym_bfd = bfd_mach_o_fat_extract (base_dsym_bfd, bfd_object, arch);
4928 if (bfd_mach_o_dsym_for_uuid_p (dsym_bfd, uuid_cmd))
4929 return dsym_bfd;
4930
4931 bfd_close (dsym_bfd);
4932 if (base_dsym_bfd != dsym_bfd)
4933 bfd_close (base_dsym_bfd);
4934
4935 return NULL;
4936 }
4937
4938 /* Return a BFD created from a dSYM file for ABFD.
4939 The caller is responsible for closing the returned BFD object, its
4940 filename, and its my_archive if the returned BFD is in a fat dSYM. */
4941
4942 static bfd *
4943 bfd_mach_o_follow_dsym (bfd *abfd)
4944 {
4945 char *dsym_filename;
4946 bfd_mach_o_uuid_command *uuid_cmd;
4947 bfd *dsym_bfd, *base_bfd = abfd;
4948 const char *base_basename;
4949
4950 if (abfd == NULL || bfd_get_flavour (abfd) != bfd_target_mach_o_flavour)
4951 return NULL;
4952
4953 if (abfd->my_archive)
4954 base_bfd = abfd->my_archive;
4955 /* BFD may have been opened from a stream. */
4956 if (base_bfd->filename == NULL)
4957 {
4958 bfd_set_error (bfd_error_invalid_operation);
4959 return NULL;
4960 }
4961 base_basename = lbasename (base_bfd->filename);
4962
4963 uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd);
4964 if (uuid_cmd == NULL)
4965 return NULL;
4966
4967 /* TODO: We assume the DWARF file has the same as the binary's.
4968 It seems apple's GDB checks all files in the dSYM bundle directory.
4969 http://opensource.apple.com/source/gdb/gdb-1708/src/gdb/macosx/macosx-tdep.c
4970 */
4971 dsym_filename = (char *)bfd_malloc (strlen (base_bfd->filename)
4972 + strlen (dsym_subdir) + 1
4973 + strlen (base_basename) + 1);
4974 sprintf (dsym_filename, "%s%s/%s",
4975 base_bfd->filename, dsym_subdir, base_basename);
4976
4977 dsym_bfd = bfd_mach_o_find_dsym (dsym_filename, uuid_cmd,
4978 bfd_get_arch_info (abfd));
4979 if (dsym_bfd == NULL)
4980 free (dsym_filename);
4981
4982 return dsym_bfd;
4983 }
4984
4985 bfd_boolean
4986 bfd_mach_o_find_nearest_line (bfd *abfd,
4987 asection *section,
4988 asymbol **symbols,
4989 bfd_vma offset,
4990 const char **filename_ptr,
4991 const char **functionname_ptr,
4992 unsigned int *line_ptr)
4993 {
4994 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4995 if (mdata == NULL)
4996 return FALSE;
4997 switch (mdata->header.filetype)
4998 {
4999 case BFD_MACH_O_MH_OBJECT:
5000 break;
5001 case BFD_MACH_O_MH_EXECUTE:
5002 case BFD_MACH_O_MH_DYLIB:
5003 case BFD_MACH_O_MH_BUNDLE:
5004 case BFD_MACH_O_MH_KEXT_BUNDLE:
5005 if (mdata->dwarf2_find_line_info == NULL)
5006 {
5007 mdata->dsym_bfd = bfd_mach_o_follow_dsym (abfd);
5008 /* When we couldn't find dSYM for this binary, we look for
5009 the debug information in the binary itself. In this way,
5010 we won't try finding separated dSYM again because
5011 mdata->dwarf2_find_line_info will be filled. */
5012 if (! mdata->dsym_bfd)
5013 break;
5014 if (! _bfd_dwarf2_slurp_debug_info (abfd, mdata->dsym_bfd,
5015 dwarf_debug_sections, symbols,
5016 &mdata->dwarf2_find_line_info))
5017 return FALSE;
5018 }
5019 break;
5020 default:
5021 return FALSE;
5022 }
5023 if (_bfd_dwarf2_find_nearest_line (abfd, dwarf_debug_sections,
5024 section, symbols, offset,
5025 filename_ptr, functionname_ptr,
5026 line_ptr, NULL, 0,
5027 &mdata->dwarf2_find_line_info))
5028 return TRUE;
5029 return FALSE;
5030 }
5031
5032 bfd_boolean
5033 bfd_mach_o_close_and_cleanup (bfd *abfd)
5034 {
5035 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5036 if (bfd_get_format (abfd) == bfd_object && mdata != NULL)
5037 {
5038 _bfd_dwarf2_cleanup_debug_info (abfd, &mdata->dwarf2_find_line_info);
5039 bfd_mach_o_free_cached_info (abfd);
5040 if (mdata->dsym_bfd != NULL)
5041 {
5042 bfd *fat_bfd = mdata->dsym_bfd->my_archive;
5043 char *dsym_filename = (char *)(fat_bfd
5044 ? fat_bfd->filename
5045 : mdata->dsym_bfd->filename);
5046 bfd_close (mdata->dsym_bfd);
5047 mdata->dsym_bfd = NULL;
5048 if (fat_bfd)
5049 bfd_close (fat_bfd);
5050 free (dsym_filename);
5051 }
5052 }
5053
5054 if (bfd_get_format (abfd) == bfd_archive
5055 && abfd->xvec == &mach_o_fat_vec)
5056 return TRUE;
5057 return _bfd_generic_close_and_cleanup (abfd);
5058 }
5059
5060 bfd_boolean bfd_mach_o_free_cached_info (bfd *abfd)
5061 {
5062 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5063 asection *asect;
5064 free (mdata->dyn_reloc_cache);
5065 mdata->dyn_reloc_cache = NULL;
5066 for (asect = abfd->sections; asect != NULL; asect = asect->next)
5067 {
5068 free (asect->relocation);
5069 asect->relocation = NULL;
5070 }
5071
5072 return TRUE;
5073 }
5074
5075 #define bfd_mach_o_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
5076 #define bfd_mach_o_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_lookup
5077
5078 #define bfd_mach_o_swap_reloc_in NULL
5079 #define bfd_mach_o_swap_reloc_out NULL
5080 #define bfd_mach_o_print_thread NULL
5081 #define bfd_mach_o_tgt_seg_table NULL
5082 #define bfd_mach_o_section_type_valid_for_tgt NULL
5083
5084 #define TARGET_NAME mach_o_be_vec
5085 #define TARGET_STRING "mach-o-be"
5086 #define TARGET_ARCHITECTURE bfd_arch_unknown
5087 #define TARGET_PAGESIZE 1
5088 #define TARGET_BIG_ENDIAN 1
5089 #define TARGET_ARCHIVE 0
5090 #define TARGET_PRIORITY 1
5091 #include "mach-o-target.c"
5092
5093 #undef TARGET_NAME
5094 #undef TARGET_STRING
5095 #undef TARGET_ARCHITECTURE
5096 #undef TARGET_PAGESIZE
5097 #undef TARGET_BIG_ENDIAN
5098 #undef TARGET_ARCHIVE
5099 #undef TARGET_PRIORITY
5100
5101 #define TARGET_NAME mach_o_le_vec
5102 #define TARGET_STRING "mach-o-le"
5103 #define TARGET_ARCHITECTURE bfd_arch_unknown
5104 #define TARGET_PAGESIZE 1
5105 #define TARGET_BIG_ENDIAN 0
5106 #define TARGET_ARCHIVE 0
5107 #define TARGET_PRIORITY 1
5108
5109 #include "mach-o-target.c"
5110
5111 #undef TARGET_NAME
5112 #undef TARGET_STRING
5113 #undef TARGET_ARCHITECTURE
5114 #undef TARGET_PAGESIZE
5115 #undef TARGET_BIG_ENDIAN
5116 #undef TARGET_ARCHIVE
5117 #undef TARGET_PRIORITY
5118
5119 /* Not yet handled: creating an archive. */
5120 #define bfd_mach_o_mkarchive _bfd_noarchive_mkarchive
5121
5122 /* Not used. */
5123 #define bfd_mach_o_read_ar_hdr _bfd_noarchive_read_ar_hdr
5124 #define bfd_mach_o_write_ar_hdr _bfd_noarchive_write_ar_hdr
5125 #define bfd_mach_o_slurp_armap _bfd_noarchive_slurp_armap
5126 #define bfd_mach_o_slurp_extended_name_table _bfd_noarchive_slurp_extended_name_table
5127 #define bfd_mach_o_construct_extended_name_table _bfd_noarchive_construct_extended_name_table
5128 #define bfd_mach_o_truncate_arname _bfd_noarchive_truncate_arname
5129 #define bfd_mach_o_write_armap _bfd_noarchive_write_armap
5130 #define bfd_mach_o_get_elt_at_index _bfd_noarchive_get_elt_at_index
5131 #define bfd_mach_o_generic_stat_arch_elt bfd_mach_o_fat_stat_arch_elt
5132 #define bfd_mach_o_update_armap_timestamp _bfd_noarchive_update_armap_timestamp
5133
5134 #define TARGET_NAME mach_o_fat_vec
5135 #define TARGET_STRING "mach-o-fat"
5136 #define TARGET_ARCHITECTURE bfd_arch_unknown
5137 #define TARGET_PAGESIZE 1
5138 #define TARGET_BIG_ENDIAN 1
5139 #define TARGET_ARCHIVE 1
5140 #define TARGET_PRIORITY 0
5141
5142 #include "mach-o-target.c"
5143
5144 #undef TARGET_NAME
5145 #undef TARGET_STRING
5146 #undef TARGET_ARCHITECTURE
5147 #undef TARGET_PAGESIZE
5148 #undef TARGET_BIG_ENDIAN
5149 #undef TARGET_ARCHIVE
5150 #undef TARGET_PRIORITY
GDB Binutils - Deliverables
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