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Fix typo in gdb/testsuite/ChangeLog
[deliverable/binutils-gdb.git] / bfd / mach-o.c
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1/* Mach-O support for BFD.
2 Copyright (C) 1999-2020 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 <limits.h>
23#include "bfd.h"
24#include "libbfd.h"
25#include "libiberty.h"
26#include "mach-o.h"
27#include "aout/stab_gnu.h"
28#include "mach-o/reloc.h"
29#include "mach-o/external.h"
30#include <ctype.h>
31#include <stdlib.h>
32#include <string.h>
33
34#define bfd_mach_o_object_p bfd_mach_o_gen_object_p
35#define bfd_mach_o_core_p bfd_mach_o_gen_core_p
36#define bfd_mach_o_mkobject bfd_mach_o_gen_mkobject
37
38#define FILE_ALIGN(off, algn) \
39 (((off) + ((file_ptr) 1 << (algn)) - 1) & ((file_ptr) -1U << (algn)))
40
41static bfd_boolean
42bfd_mach_o_read_dyld_content (bfd *abfd, bfd_mach_o_dyld_info_command *cmd);
43
44unsigned int
45bfd_mach_o_version (bfd *abfd)
46{
47 bfd_mach_o_data_struct *mdata = NULL;
48
49 BFD_ASSERT (bfd_mach_o_valid (abfd));
50 mdata = bfd_mach_o_get_data (abfd);
51
52 return mdata->header.version;
53}
54
55bfd_boolean
56bfd_mach_o_valid (bfd *abfd)
57{
58 if (abfd == NULL || abfd->xvec == NULL)
59 return FALSE;
60
61 if (abfd->xvec->flavour != bfd_target_mach_o_flavour)
62 return FALSE;
63
64 if (bfd_mach_o_get_data (abfd) == NULL)
65 return FALSE;
66 return TRUE;
67}
68
69static INLINE bfd_boolean
70mach_o_wide_p (bfd_mach_o_header *header)
71{
72 switch (header->version)
73 {
74 case 1:
75 return FALSE;
76 case 2:
77 return TRUE;
78 default:
79 BFD_FAIL ();
80 return FALSE;
81 }
82}
83
84static INLINE bfd_boolean
85bfd_mach_o_wide_p (bfd *abfd)
86{
87 return mach_o_wide_p (&bfd_mach_o_get_data (abfd)->header);
88}
89
90/* Tables to translate well known Mach-O segment/section names to bfd
91 names. Use of canonical names (such as .text or .debug_frame) is required
92 by gdb. */
93
94/* __TEXT Segment. */
95static const mach_o_section_name_xlat text_section_names_xlat[] =
96 {
97 { ".text", "__text",
98 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR,
99 BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS, 0},
100 { ".const", "__const",
101 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
102 BFD_MACH_O_S_ATTR_NONE, 0},
103 { ".static_const", "__static_const",
104 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
105 BFD_MACH_O_S_ATTR_NONE, 0},
106 { ".cstring", "__cstring",
107 SEC_READONLY | SEC_DATA | SEC_LOAD | SEC_MERGE | SEC_STRINGS,
108 BFD_MACH_O_S_CSTRING_LITERALS,
109 BFD_MACH_O_S_ATTR_NONE, 0},
110 { ".literal4", "__literal4",
111 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_4BYTE_LITERALS,
112 BFD_MACH_O_S_ATTR_NONE, 2},
113 { ".literal8", "__literal8",
114 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_8BYTE_LITERALS,
115 BFD_MACH_O_S_ATTR_NONE, 3},
116 { ".literal16", "__literal16",
117 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_16BYTE_LITERALS,
118 BFD_MACH_O_S_ATTR_NONE, 4},
119 { ".constructor", "__constructor",
120 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR,
121 BFD_MACH_O_S_ATTR_NONE, 0},
122 { ".destructor", "__destructor",
123 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR,
124 BFD_MACH_O_S_ATTR_NONE, 0},
125 { ".eh_frame", "__eh_frame",
126 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_COALESCED,
127 BFD_MACH_O_S_ATTR_LIVE_SUPPORT
128 | BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS
129 | BFD_MACH_O_S_ATTR_NO_TOC, 2},
130 { NULL, NULL, 0, 0, 0, 0}
131 };
132
133/* __DATA Segment. */
134static const mach_o_section_name_xlat data_section_names_xlat[] =
135 {
136 { ".data", "__data",
137 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
138 BFD_MACH_O_S_ATTR_NONE, 0},
139 { ".bss", "__bss",
140 SEC_NO_FLAGS, BFD_MACH_O_S_ZEROFILL,
141 BFD_MACH_O_S_ATTR_NONE, 0},
142 { ".const_data", "__const",
143 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
144 BFD_MACH_O_S_ATTR_NONE, 0},
145 { ".static_data", "__static_data",
146 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
147 BFD_MACH_O_S_ATTR_NONE, 0},
148 { ".mod_init_func", "__mod_init_func",
149 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS,
150 BFD_MACH_O_S_ATTR_NONE, 2},
151 { ".mod_term_func", "__mod_term_func",
152 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS,
153 BFD_MACH_O_S_ATTR_NONE, 2},
154 { ".dyld", "__dyld",
155 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
156 BFD_MACH_O_S_ATTR_NONE, 0},
157 { ".cfstring", "__cfstring",
158 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
159 BFD_MACH_O_S_ATTR_NONE, 2},
160 { NULL, NULL, 0, 0, 0, 0}
161 };
162
163/* __DWARF Segment. */
164static const mach_o_section_name_xlat dwarf_section_names_xlat[] =
165 {
166 { ".debug_frame", "__debug_frame",
167 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
168 BFD_MACH_O_S_ATTR_DEBUG, 0},
169 { ".debug_info", "__debug_info",
170 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
171 BFD_MACH_O_S_ATTR_DEBUG, 0},
172 { ".debug_abbrev", "__debug_abbrev",
173 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
174 BFD_MACH_O_S_ATTR_DEBUG, 0},
175 { ".debug_aranges", "__debug_aranges",
176 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
177 BFD_MACH_O_S_ATTR_DEBUG, 0},
178 { ".debug_macinfo", "__debug_macinfo",
179 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
180 BFD_MACH_O_S_ATTR_DEBUG, 0},
181 { ".debug_line", "__debug_line",
182 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
183 BFD_MACH_O_S_ATTR_DEBUG, 0},
184 { ".debug_loc", "__debug_loc",
185 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
186 BFD_MACH_O_S_ATTR_DEBUG, 0},
187 { ".debug_pubnames", "__debug_pubnames",
188 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
189 BFD_MACH_O_S_ATTR_DEBUG, 0},
190 { ".debug_pubtypes", "__debug_pubtypes",
191 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
192 BFD_MACH_O_S_ATTR_DEBUG, 0},
193 { ".debug_str", "__debug_str",
194 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
195 BFD_MACH_O_S_ATTR_DEBUG, 0},
196 { ".debug_ranges", "__debug_ranges",
197 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
198 BFD_MACH_O_S_ATTR_DEBUG, 0},
199 { ".debug_macro", "__debug_macro",
200 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
201 BFD_MACH_O_S_ATTR_DEBUG, 0},
202 { ".debug_gdb_scripts", "__debug_gdb_scri",
203 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
204 BFD_MACH_O_S_ATTR_DEBUG, 0},
205 { NULL, NULL, 0, 0, 0, 0}
206 };
207
208/* __OBJC Segment. */
209static const mach_o_section_name_xlat objc_section_names_xlat[] =
210 {
211 { ".objc_class", "__class",
212 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
213 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
214 { ".objc_meta_class", "__meta_class",
215 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
216 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
217 { ".objc_cat_cls_meth", "__cat_cls_meth",
218 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
219 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
220 { ".objc_cat_inst_meth", "__cat_inst_meth",
221 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
222 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
223 { ".objc_protocol", "__protocol",
224 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
225 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
226 { ".objc_string_object", "__string_object",
227 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
228 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
229 { ".objc_cls_meth", "__cls_meth",
230 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
231 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
232 { ".objc_inst_meth", "__inst_meth",
233 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
234 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
235 { ".objc_cls_refs", "__cls_refs",
236 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LITERAL_POINTERS,
237 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
238 { ".objc_message_refs", "__message_refs",
239 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LITERAL_POINTERS,
240 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
241 { ".objc_symbols", "__symbols",
242 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
243 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
244 { ".objc_category", "__category",
245 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
246 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
247 { ".objc_class_vars", "__class_vars",
248 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
249 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
250 { ".objc_instance_vars", "__instance_vars",
251 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
252 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
253 { ".objc_module_info", "__module_info",
254 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
255 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
256 { ".objc_selector_strs", "__selector_strs",
257 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_CSTRING_LITERALS,
258 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
259 { ".objc_image_info", "__image_info",
260 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
261 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
262 { ".objc_selector_fixup", "__sel_fixup",
263 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
264 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
265 /* Objc V1 */
266 { ".objc1_class_ext", "__class_ext",
267 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
268 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
269 { ".objc1_property_list", "__property",
270 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
271 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
272 { ".objc1_protocol_ext", "__protocol_ext",
273 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
274 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
275 { NULL, NULL, 0, 0, 0, 0}
276 };
277
278static const mach_o_segment_name_xlat segsec_names_xlat[] =
279 {
280 { "__TEXT", text_section_names_xlat },
281 { "__DATA", data_section_names_xlat },
282 { "__DWARF", dwarf_section_names_xlat },
283 { "__OBJC", objc_section_names_xlat },
284 { NULL, NULL }
285 };
286
287static const char dsym_subdir[] = ".dSYM/Contents/Resources/DWARF";
288
289/* For both cases bfd-name => mach-o name and vice versa, the specific target
290 is checked before the generic. This allows a target (e.g. ppc for cstring)
291 to override the generic definition with a more specific one. */
292
293/* Fetch the translation from a Mach-O section designation (segment, section)
294 as a bfd short name, if one exists. Otherwise return NULL.
295
296 Allow the segment and section names to be unterminated 16 byte arrays. */
297
298const mach_o_section_name_xlat *
299bfd_mach_o_section_data_for_mach_sect (bfd *abfd, const char *segname,
300 const char *sectname)
301{
302 const struct mach_o_segment_name_xlat *seg;
303 const mach_o_section_name_xlat *sec;
304 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
305
306 /* First try any target-specific translations defined... */
307 if (bed->segsec_names_xlat)
308 for (seg = bed->segsec_names_xlat; seg->segname; seg++)
309 if (strncmp (seg->segname, segname, BFD_MACH_O_SEGNAME_SIZE) == 0)
310 for (sec = seg->sections; sec->mach_o_name; sec++)
311 if (strncmp (sec->mach_o_name, sectname,
312 BFD_MACH_O_SECTNAME_SIZE) == 0)
313 return sec;
314
315 /* ... and then the Mach-O generic ones. */
316 for (seg = segsec_names_xlat; seg->segname; seg++)
317 if (strncmp (seg->segname, segname, BFD_MACH_O_SEGNAME_SIZE) == 0)
318 for (sec = seg->sections; sec->mach_o_name; sec++)
319 if (strncmp (sec->mach_o_name, sectname,
320 BFD_MACH_O_SECTNAME_SIZE) == 0)
321 return sec;
322
323 return NULL;
324}
325
326/* If the bfd_name for this section is a 'canonical' form for which we
327 know the Mach-O data, return the segment name and the data for the
328 Mach-O equivalent. Otherwise return NULL. */
329
330const mach_o_section_name_xlat *
331bfd_mach_o_section_data_for_bfd_name (bfd *abfd, const char *bfd_name,
332 const char **segname)
333{
334 const struct mach_o_segment_name_xlat *seg;
335 const mach_o_section_name_xlat *sec;
336 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
337 *segname = NULL;
338
339 if (bfd_name[0] != '.')
340 return NULL;
341
342 /* First try any target-specific translations defined... */
343 if (bed->segsec_names_xlat)
344 for (seg = bed->segsec_names_xlat; seg->segname; seg++)
345 for (sec = seg->sections; sec->bfd_name; sec++)
346 if (strcmp (bfd_name, sec->bfd_name) == 0)
347 {
348 *segname = seg->segname;
349 return sec;
350 }
351
352 /* ... and then the Mach-O generic ones. */
353 for (seg = segsec_names_xlat; seg->segname; seg++)
354 for (sec = seg->sections; sec->bfd_name; sec++)
355 if (strcmp (bfd_name, sec->bfd_name) == 0)
356 {
357 *segname = seg->segname;
358 return sec;
359 }
360
361 return NULL;
362}
363
364/* Convert Mach-O section name to BFD.
365
366 Try to use standard/canonical names, for which we have tables including
367 default flag settings - which are returned. Otherwise forge a new name
368 in the form "<segmentname>.<sectionname>" this will be prefixed with
369 LC_SEGMENT. if the segment name does not begin with an underscore.
370
371 SEGNAME and SECTNAME are 16 byte arrays (they do not need to be NUL-
372 terminated if the name length is exactly 16 bytes - but must be if the name
373 length is less than 16 characters). */
374
375void
376bfd_mach_o_convert_section_name_to_bfd (bfd *abfd, const char *segname,
377 const char *secname, const char **name,
378 flagword *flags)
379{
380 const mach_o_section_name_xlat *xlat;
381 char *res;
382 unsigned int len;
383 const char *pfx = "";
384
385 *name = NULL;
386 *flags = SEC_NO_FLAGS;
387
388 /* First search for a canonical name...
389 xlat will be non-null if there is an entry for segname, secname. */
390 xlat = bfd_mach_o_section_data_for_mach_sect (abfd, segname, secname);
391 if (xlat)
392 {
393 len = strlen (xlat->bfd_name);
394 res = bfd_alloc (abfd, len + 1);
395 if (res == NULL)
396 return;
397 memcpy (res, xlat->bfd_name, len+1);
398 *name = res;
399 *flags = xlat->bfd_flags;
400 return;
401 }
402
403 /* ... else we make up a bfd name from the segment concatenated with the
404 section. */
405
406 len = 16 + 1 + 16 + 1;
407
408 /* Put "LC_SEGMENT." prefix if the segment name is weird (ie doesn't start
409 with an underscore. */
410 if (segname[0] != '_')
411 {
412 static const char seg_pfx[] = "LC_SEGMENT.";
413
414 pfx = seg_pfx;
415 len += sizeof (seg_pfx) - 1;
416 }
417
418 res = bfd_alloc (abfd, len);
419 if (res == NULL)
420 return;
421 snprintf (res, len, "%s%.16s.%.16s", pfx, segname, secname);
422 *name = res;
423}
424
425/* Convert a bfd section name to a Mach-O segment + section name.
426
427 If the name is a canonical one for which we have a Darwin match
428 return the translation table - which contains defaults for flags,
429 type, attribute and default alignment data.
430
431 Otherwise, expand the bfd_name (assumed to be in the form
432 "[LC_SEGMENT.]<segmentname>.<sectionname>") and return NULL. */
433
434static const mach_o_section_name_xlat *
435bfd_mach_o_convert_section_name_to_mach_o (bfd *abfd ATTRIBUTE_UNUSED,
436 asection *sect,
437 bfd_mach_o_section *section)
438{
439 const mach_o_section_name_xlat *xlat;
440 const char *name = bfd_section_name (sect);
441 const char *segname;
442 const char *dot;
443 unsigned int len;
444 unsigned int seglen;
445 unsigned int seclen;
446
447 memset (section->segname, 0, BFD_MACH_O_SEGNAME_SIZE + 1);
448 memset (section->sectname, 0, BFD_MACH_O_SECTNAME_SIZE + 1);
449
450 /* See if is a canonical name ... */
451 xlat = bfd_mach_o_section_data_for_bfd_name (abfd, name, &segname);
452 if (xlat)
453 {
454 strcpy (section->segname, segname);
455 strcpy (section->sectname, xlat->mach_o_name);
456 return xlat;
457 }
458
459 /* .. else we convert our constructed one back to Mach-O.
460 Strip LC_SEGMENT. prefix, if present. */
461 if (strncmp (name, "LC_SEGMENT.", 11) == 0)
462 name += 11;
463
464 /* Find a dot. */
465 dot = strchr (name, '.');
466 len = strlen (name);
467
468 /* Try to split name into segment and section names. */
469 if (dot && dot != name)
470 {
471 seglen = dot - name;
472 seclen = len - (dot + 1 - name);
473
474 if (seglen <= BFD_MACH_O_SEGNAME_SIZE
475 && seclen <= BFD_MACH_O_SECTNAME_SIZE)
476 {
477 memcpy (section->segname, name, seglen);
478 section->segname[seglen] = 0;
479 memcpy (section->sectname, dot + 1, seclen);
480 section->sectname[seclen] = 0;
481 return NULL;
482 }
483 }
484
485 /* The segment and section names are both missing - don't make them
486 into dots. */
487 if (dot && dot == name)
488 return NULL;
489
490 /* Just duplicate the name into both segment and section. */
491 if (len > 16)
492 len = 16;
493 memcpy (section->segname, name, len);
494 section->segname[len] = 0;
495 memcpy (section->sectname, name, len);
496 section->sectname[len] = 0;
497 return NULL;
498}
499
500/* Return the size of an entry for section SEC.
501 Must be called only for symbol pointer section and symbol stubs
502 sections. */
503
504unsigned int
505bfd_mach_o_section_get_entry_size (bfd *abfd, bfd_mach_o_section *sec)
506{
507 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
508 {
509 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
510 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
511 return bfd_mach_o_wide_p (abfd) ? 8 : 4;
512 case BFD_MACH_O_S_SYMBOL_STUBS:
513 return sec->reserved2;
514 default:
515 BFD_FAIL ();
516 return 0;
517 }
518}
519
520/* Return the number of indirect symbols for a section.
521 Must be called only for symbol pointer section and symbol stubs
522 sections. */
523
524unsigned int
525bfd_mach_o_section_get_nbr_indirect (bfd *abfd, bfd_mach_o_section *sec)
526{
527 unsigned int elsz;
528
529 elsz = bfd_mach_o_section_get_entry_size (abfd, sec);
530 if (elsz == 0)
531 return 0;
532 else
533 return sec->size / elsz;
534}
535
536/* Append command CMD to ABFD. Note that header.ncmds is not updated. */
537
538static void
539bfd_mach_o_append_command (bfd *abfd, bfd_mach_o_load_command *cmd)
540{
541 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
542
543 if (mdata->last_command != NULL)
544 mdata->last_command->next = cmd;
545 else
546 mdata->first_command = cmd;
547 mdata->last_command = cmd;
548 cmd->next = NULL;
549}
550
551/* Copy any private info we understand from the input symbol
552 to the output symbol. */
553
554bfd_boolean
555bfd_mach_o_bfd_copy_private_symbol_data (bfd *ibfd ATTRIBUTE_UNUSED,
556 asymbol *isymbol,
557 bfd *obfd ATTRIBUTE_UNUSED,
558 asymbol *osymbol)
559{
560 bfd_mach_o_asymbol *os, *is;
561
562 os = (bfd_mach_o_asymbol *)osymbol;
563 is = (bfd_mach_o_asymbol *)isymbol;
564 os->n_type = is->n_type;
565 os->n_sect = is->n_sect;
566 os->n_desc = is->n_desc;
567 os->symbol.udata.i = is->symbol.udata.i;
568
569 return TRUE;
570}
571
572/* Copy any private info we understand from the input section
573 to the output section. */
574
575bfd_boolean
576bfd_mach_o_bfd_copy_private_section_data (bfd *ibfd, asection *isection,
577 bfd *obfd, asection *osection)
578{
579 bfd_mach_o_section *os = bfd_mach_o_get_mach_o_section (osection);
580 bfd_mach_o_section *is = bfd_mach_o_get_mach_o_section (isection);
581
582 if (ibfd->xvec->flavour != bfd_target_mach_o_flavour
583 || obfd->xvec->flavour != bfd_target_mach_o_flavour)
584 return TRUE;
585
586 BFD_ASSERT (is != NULL && os != NULL);
587
588 os->flags = is->flags;
589 os->reserved1 = is->reserved1;
590 os->reserved2 = is->reserved2;
591 os->reserved3 = is->reserved3;
592
593 return TRUE;
594}
595
596static const char *
597cputype (unsigned long value)
598{
599 switch (value)
600 {
601 case BFD_MACH_O_CPU_TYPE_VAX: return "VAX";
602 case BFD_MACH_O_CPU_TYPE_MC680x0: return "MC68k";
603 case BFD_MACH_O_CPU_TYPE_I386: return "I386";
604 case BFD_MACH_O_CPU_TYPE_MIPS: return "MIPS";
605 case BFD_MACH_O_CPU_TYPE_MC98000: return "MC98k";
606 case BFD_MACH_O_CPU_TYPE_HPPA: return "HPPA";
607 case BFD_MACH_O_CPU_TYPE_ARM: return "ARM";
608 case BFD_MACH_O_CPU_TYPE_MC88000: return "MC88K";
609 case BFD_MACH_O_CPU_TYPE_SPARC: return "SPARC";
610 case BFD_MACH_O_CPU_TYPE_I860: return "I860";
611 case BFD_MACH_O_CPU_TYPE_ALPHA: return "ALPHA";
612 case BFD_MACH_O_CPU_TYPE_POWERPC: return "PPC";
613 case BFD_MACH_O_CPU_TYPE_POWERPC_64: return "PPC64";
614 case BFD_MACH_O_CPU_TYPE_X86_64: return "X86_64";
615 case BFD_MACH_O_CPU_TYPE_ARM64: return "ARM64";
616 default: return _("<unknown>");
617 }
618}
619
620static const char *
621cpusubtype (unsigned long cpu_type, unsigned long cpu_subtype)
622{
623 static char buffer[128];
624
625 buffer[0] = 0;
626 switch (cpu_subtype & BFD_MACH_O_CPU_SUBTYPE_MASK)
627 {
628 case 0:
629 break;
630 case BFD_MACH_O_CPU_SUBTYPE_LIB64:
631 sprintf (buffer, " (LIB64)"); break;
632 default:
633 sprintf (buffer, _("<unknown mask flags>")); break;
634 }
635
636 cpu_subtype &= ~ BFD_MACH_O_CPU_SUBTYPE_MASK;
637
638 switch (cpu_type)
639 {
640 case BFD_MACH_O_CPU_TYPE_X86_64:
641 case BFD_MACH_O_CPU_TYPE_I386:
642 switch (cpu_subtype)
643 {
644 case BFD_MACH_O_CPU_SUBTYPE_X86_ALL:
645 return strcat (buffer, " (X86_ALL)");
646 default:
647 break;
648 }
649 break;
650
651 case BFD_MACH_O_CPU_TYPE_ARM:
652 switch (cpu_subtype)
653 {
654 case BFD_MACH_O_CPU_SUBTYPE_ARM_ALL:
655 return strcat (buffer, " (ARM_ALL)");
656 case BFD_MACH_O_CPU_SUBTYPE_ARM_V4T:
657 return strcat (buffer, " (ARM_V4T)");
658 case BFD_MACH_O_CPU_SUBTYPE_ARM_V6:
659 return strcat (buffer, " (ARM_V6)");
660 case BFD_MACH_O_CPU_SUBTYPE_ARM_V5TEJ:
661 return strcat (buffer, " (ARM_V5TEJ)");
662 case BFD_MACH_O_CPU_SUBTYPE_ARM_XSCALE:
663 return strcat (buffer, " (ARM_XSCALE)");
664 case BFD_MACH_O_CPU_SUBTYPE_ARM_V7:
665 return strcat (buffer, " (ARM_V7)");
666 default:
667 break;
668 }
669 break;
670
671 case BFD_MACH_O_CPU_TYPE_ARM64:
672 switch (cpu_subtype)
673 {
674 case BFD_MACH_O_CPU_SUBTYPE_ARM64_ALL:
675 return strcat (buffer, " (ARM64_ALL)");
676 case BFD_MACH_O_CPU_SUBTYPE_ARM64_V8:
677 return strcat (buffer, " (ARM64_V8)");
678 default:
679 break;
680 }
681 break;
682
683 default:
684 break;
685 }
686
687 if (cpu_subtype != 0)
688 return strcat (buffer, _(" (<unknown>)"));
689
690 return buffer;
691}
692
693bfd_boolean
694bfd_mach_o_bfd_print_private_bfd_data (bfd *abfd, void *ptr)
695{
696 FILE * file = (FILE *) ptr;
697 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
698
699 fprintf (file, _(" MACH-O header:\n"));
700 fprintf (file, _(" magic: %#lx\n"), (long) mdata->header.magic);
701 fprintf (file, _(" cputype: %#lx (%s)\n"), (long) mdata->header.cputype,
702 cputype (mdata->header.cputype));
703 fprintf (file, _(" cpusubtype: %#lx%s\n"), (long) mdata->header.cpusubtype,
704 cpusubtype (mdata->header.cputype, mdata->header.cpusubtype));
705 fprintf (file, _(" filetype: %#lx\n"), (long) mdata->header.filetype);
706 fprintf (file, _(" ncmds: %#lx\n"), (long) mdata->header.ncmds);
707 fprintf (file, _(" sizeocmds: %#lx\n"), (long) mdata->header.sizeofcmds);
708 fprintf (file, _(" flags: %#lx\n"), (long) mdata->header.flags);
709 fprintf (file, _(" version: %x\n"), mdata->header.version);
710
711 return TRUE;
712}
713
714/* Copy any private info we understand from the input bfd
715 to the output bfd. */
716
717bfd_boolean
718bfd_mach_o_bfd_copy_private_header_data (bfd *ibfd, bfd *obfd)
719{
720 bfd_mach_o_data_struct *imdata;
721 bfd_mach_o_data_struct *omdata;
722 bfd_mach_o_load_command *icmd;
723
724 if (bfd_get_flavour (ibfd) != bfd_target_mach_o_flavour
725 || bfd_get_flavour (obfd) != bfd_target_mach_o_flavour)
726 return TRUE;
727
728 BFD_ASSERT (bfd_mach_o_valid (ibfd));
729 BFD_ASSERT (bfd_mach_o_valid (obfd));
730
731 imdata = bfd_mach_o_get_data (ibfd);
732 omdata = bfd_mach_o_get_data (obfd);
733
734 /* Copy header flags. */
735 omdata->header.flags = imdata->header.flags;
736
737 /* PR 23299. Copy the cputype. */
738 if (imdata->header.cputype != omdata->header.cputype)
739 {
740 if (omdata->header.cputype == 0)
741 omdata->header.cputype = imdata->header.cputype;
742 else if (imdata->header.cputype != 0)
743 /* Urg - what has happened ? */
744 _bfd_error_handler (_("incompatible cputypes in mach-o files: %ld vs %ld"),
745 (long) imdata->header.cputype,
746 (long) omdata->header.cputype);
747 }
748
749 /* Copy the cpusubtype. */
750 omdata->header.cpusubtype = imdata->header.cpusubtype;
751
752 /* Copy commands. */
753 for (icmd = imdata->first_command; icmd != NULL; icmd = icmd->next)
754 {
755 bfd_mach_o_load_command *ocmd;
756
757 switch (icmd->type)
758 {
759 case BFD_MACH_O_LC_LOAD_DYLIB:
760 case BFD_MACH_O_LC_LOAD_DYLINKER:
761 case BFD_MACH_O_LC_DYLD_INFO:
762 /* Command is copied. */
763 ocmd = bfd_alloc (obfd, sizeof (bfd_mach_o_load_command));
764 if (ocmd == NULL)
765 return FALSE;
766
767 /* Copy common fields. */
768 ocmd->type = icmd->type;
769 ocmd->type_required = icmd->type_required;
770 ocmd->offset = 0;
771 ocmd->len = icmd->len;
772 break;
773
774 default:
775 /* Command is not copied. */
776 continue;
777 break;
778 }
779
780 switch (icmd->type)
781 {
782 case BFD_MACH_O_LC_LOAD_DYLIB:
783 {
784 bfd_mach_o_dylib_command *idy = &icmd->command.dylib;
785 bfd_mach_o_dylib_command *ody = &ocmd->command.dylib;
786
787 ody->name_offset = idy->name_offset;
788 ody->timestamp = idy->timestamp;
789 ody->current_version = idy->current_version;
790 ody->compatibility_version = idy->compatibility_version;
791 ody->name_str = idy->name_str;
792 }
793 break;
794
795 case BFD_MACH_O_LC_LOAD_DYLINKER:
796 {
797 bfd_mach_o_dylinker_command *idy = &icmd->command.dylinker;
798 bfd_mach_o_dylinker_command *ody = &ocmd->command.dylinker;
799
800 ody->name_offset = idy->name_offset;
801 ody->name_str = idy->name_str;
802 }
803 break;
804
805 case BFD_MACH_O_LC_DYLD_INFO:
806 {
807 bfd_mach_o_dyld_info_command *idy = &icmd->command.dyld_info;
808 bfd_mach_o_dyld_info_command *ody = &ocmd->command.dyld_info;
809
810 if (bfd_mach_o_read_dyld_content (ibfd, idy))
811 {
812 ody->rebase_size = idy->rebase_size;
813 ody->rebase_content = idy->rebase_content;
814
815 ody->bind_size = idy->bind_size;
816 ody->bind_content = idy->bind_content;
817
818 ody->weak_bind_size = idy->weak_bind_size;
819 ody->weak_bind_content = idy->weak_bind_content;
820
821 ody->lazy_bind_size = idy->lazy_bind_size;
822 ody->lazy_bind_content = idy->lazy_bind_content;
823
824 ody->export_size = idy->export_size;
825 ody->export_content = idy->export_content;
826 }
827 /* PR 17512L: file: 730e492d. */
828 else
829 {
830 ody->rebase_size =
831 ody->bind_size =
832 ody->weak_bind_size =
833 ody->lazy_bind_size =
834 ody->export_size = 0;
835 ody->rebase_content =
836 ody->bind_content =
837 ody->weak_bind_content =
838 ody->lazy_bind_content =
839 ody->export_content = NULL;
840 }
841 }
842 break;
843
844 default:
845 /* That command should be handled. */
846 abort ();
847 }
848
849 /* Insert command. */
850 bfd_mach_o_append_command (obfd, ocmd);
851 }
852
853 return TRUE;
854}
855
856/* This allows us to set up to 32 bits of flags (unless we invent some
857 fiendish scheme to subdivide). For now, we'll just set the file flags
858 without error checking - just overwrite. */
859
860bfd_boolean
861bfd_mach_o_bfd_set_private_flags (bfd *abfd, flagword flags)
862{
863 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
864
865 if (!mdata)
866 return FALSE;
867
868 mdata->header.flags = flags;
869 return TRUE;
870}
871
872/* Count the total number of symbols. */
873
874static long
875bfd_mach_o_count_symbols (bfd *abfd)
876{
877 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
878
879 if (mdata->symtab == NULL)
880 return 0;
881 return mdata->symtab->nsyms;
882}
883
884long
885bfd_mach_o_get_symtab_upper_bound (bfd *abfd)
886{
887 long nsyms = bfd_mach_o_count_symbols (abfd);
888
889 return ((nsyms + 1) * sizeof (asymbol *));
890}
891
892long
893bfd_mach_o_canonicalize_symtab (bfd *abfd, asymbol **alocation)
894{
895 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
896 long nsyms = bfd_mach_o_count_symbols (abfd);
897 bfd_mach_o_symtab_command *sym = mdata->symtab;
898 unsigned long j;
899
900 if (nsyms < 0)
901 return nsyms;
902
903 if (nsyms == 0)
904 {
905 /* Do not try to read symbols if there are none. */
906 alocation[0] = NULL;
907 return 0;
908 }
909
910 if (!bfd_mach_o_read_symtab_symbols (abfd))
911 {
912 _bfd_error_handler
913 (_("bfd_mach_o_canonicalize_symtab: unable to load symbols"));
914 return 0;
915 }
916
917 BFD_ASSERT (sym->symbols != NULL);
918
919 for (j = 0; j < sym->nsyms; j++)
920 alocation[j] = &sym->symbols[j].symbol;
921
922 alocation[j] = NULL;
923
924 return nsyms;
925}
926
927/* Create synthetic symbols for indirect symbols. */
928
929long
930bfd_mach_o_get_synthetic_symtab (bfd *abfd,
931 long symcount ATTRIBUTE_UNUSED,
932 asymbol **syms ATTRIBUTE_UNUSED,
933 long dynsymcount ATTRIBUTE_UNUSED,
934 asymbol **dynsyms ATTRIBUTE_UNUSED,
935 asymbol **ret)
936{
937 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
938 bfd_mach_o_dysymtab_command *dysymtab = mdata->dysymtab;
939 bfd_mach_o_symtab_command *symtab = mdata->symtab;
940 asymbol *s;
941 char * s_start;
942 char * s_end;
943 unsigned long count, i, j, n;
944 size_t size;
945 char *names;
946 char *nul_name;
947 const char stub [] = "$stub";
948
949 *ret = NULL;
950
951 /* Stop now if no symbols or no indirect symbols. */
952 if (dysymtab == NULL || dysymtab->nindirectsyms == 0
953 || symtab == NULL || symtab->symbols == NULL)
954 return 0;
955
956 /* We need to allocate a bfd symbol for every indirect symbol and to
957 allocate the memory for its name. */
958 count = dysymtab->nindirectsyms;
959 size = count * sizeof (asymbol) + 1;
960
961 for (j = 0; j < count; j++)
962 {
963 const char * strng;
964 unsigned int isym = dysymtab->indirect_syms[j];
965
966 /* Some indirect symbols are anonymous. */
967 if (isym < symtab->nsyms && (strng = symtab->symbols[isym].symbol.name))
968 /* PR 17512: file: f5b8eeba. */
969 size += strnlen (strng, symtab->strsize - (strng - symtab->strtab)) + sizeof (stub);
970 }
971
972 s_start = bfd_malloc (size);
973 s = *ret = (asymbol *) s_start;
974 if (s == NULL)
975 return -1;
976 names = (char *) (s + count);
977 nul_name = names;
978 *names++ = 0;
979 s_end = s_start + size;
980
981 n = 0;
982 for (i = 0; i < mdata->nsects; i++)
983 {
984 bfd_mach_o_section *sec = mdata->sections[i];
985 unsigned int first, last;
986 bfd_vma addr;
987 bfd_vma entry_size;
988
989 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
990 {
991 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
992 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
993 case BFD_MACH_O_S_SYMBOL_STUBS:
994 /* Only these sections have indirect symbols. */
995 first = sec->reserved1;
996 last = first + bfd_mach_o_section_get_nbr_indirect (abfd, sec);
997 addr = sec->addr;
998 entry_size = bfd_mach_o_section_get_entry_size (abfd, sec);
999
1000 /* PR 17512: file: 08e15eec. */
1001 if (first >= count || last >= count || first > last)
1002 goto fail;
1003
1004 for (j = first; j < last; j++)
1005 {
1006 unsigned int isym = dysymtab->indirect_syms[j];
1007
1008 /* PR 17512: file: 04d64d9b. */
1009 if (((char *) s) + sizeof (* s) > s_end)
1010 goto fail;
1011
1012 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
1013 s->section = sec->bfdsection;
1014 s->value = addr - sec->addr;
1015 s->udata.p = NULL;
1016
1017 if (isym < symtab->nsyms
1018 && symtab->symbols[isym].symbol.name)
1019 {
1020 const char *sym = symtab->symbols[isym].symbol.name;
1021 size_t len;
1022
1023 s->name = names;
1024 len = strlen (sym);
1025 /* PR 17512: file: 47dfd4d2. */
1026 if (names + len >= s_end)
1027 goto fail;
1028 memcpy (names, sym, len);
1029 names += len;
1030 /* PR 17512: file: 18f340a4. */
1031 if (names + sizeof (stub) >= s_end)
1032 goto fail;
1033 memcpy (names, stub, sizeof (stub));
1034 names += sizeof (stub);
1035 }
1036 else
1037 s->name = nul_name;
1038
1039 addr += entry_size;
1040 s++;
1041 n++;
1042 }
1043 break;
1044 default:
1045 break;
1046 }
1047 }
1048
1049 return n;
1050
1051 fail:
1052 free (s_start);
1053 * ret = NULL;
1054 return -1;
1055}
1056
1057void
1058bfd_mach_o_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
1059 asymbol *symbol,
1060 symbol_info *ret)
1061{
1062 bfd_symbol_info (symbol, ret);
1063}
1064
1065void
1066bfd_mach_o_print_symbol (bfd *abfd,
1067 void * afile,
1068 asymbol *symbol,
1069 bfd_print_symbol_type how)
1070{
1071 FILE *file = (FILE *) afile;
1072 const char *name;
1073 bfd_mach_o_asymbol *asym = (bfd_mach_o_asymbol *)symbol;
1074
1075 switch (how)
1076 {
1077 case bfd_print_symbol_name:
1078 fprintf (file, "%s", symbol->name);
1079 break;
1080 default:
1081 bfd_print_symbol_vandf (abfd, (void *) file, symbol);
1082 if (asym->n_type & BFD_MACH_O_N_STAB)
1083 name = bfd_get_stab_name (asym->n_type);
1084 else
1085 switch (asym->n_type & BFD_MACH_O_N_TYPE)
1086 {
1087 case BFD_MACH_O_N_UNDF:
1088 if (symbol->value == 0)
1089 name = "UND";
1090 else
1091 name = "COM";
1092 break;
1093 case BFD_MACH_O_N_ABS:
1094 name = "ABS";
1095 break;
1096 case BFD_MACH_O_N_INDR:
1097 name = "INDR";
1098 break;
1099 case BFD_MACH_O_N_PBUD:
1100 name = "PBUD";
1101 break;
1102 case BFD_MACH_O_N_SECT:
1103 name = "SECT";
1104 break;
1105 default:
1106 name = "???";
1107 break;
1108 }
1109 if (name == NULL)
1110 name = "";
1111 fprintf (file, " %02x %-6s %02x %04x",
1112 asym->n_type, name, asym->n_sect, asym->n_desc);
1113 if ((asym->n_type & BFD_MACH_O_N_STAB) == 0
1114 && (asym->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_SECT)
1115 fprintf (file, " [%s]", symbol->section->name);
1116 fprintf (file, " %s", symbol->name);
1117 }
1118}
1119
1120static void
1121bfd_mach_o_convert_architecture (bfd_mach_o_cpu_type mtype,
1122 bfd_mach_o_cpu_subtype msubtype,
1123 enum bfd_architecture *type,
1124 unsigned long *subtype)
1125{
1126 *subtype = bfd_arch_unknown;
1127
1128 switch (mtype)
1129 {
1130 case BFD_MACH_O_CPU_TYPE_VAX:
1131 *type = bfd_arch_vax;
1132 break;
1133 case BFD_MACH_O_CPU_TYPE_MC680x0:
1134 *type = bfd_arch_m68k;
1135 break;
1136 case BFD_MACH_O_CPU_TYPE_I386:
1137 *type = bfd_arch_i386;
1138 *subtype = bfd_mach_i386_i386;
1139 break;
1140 case BFD_MACH_O_CPU_TYPE_X86_64:
1141 *type = bfd_arch_i386;
1142 *subtype = bfd_mach_x86_64;
1143 break;
1144 case BFD_MACH_O_CPU_TYPE_MIPS:
1145 *type = bfd_arch_mips;
1146 break;
1147 case BFD_MACH_O_CPU_TYPE_MC98000:
1148 *type = bfd_arch_m98k;
1149 break;
1150 case BFD_MACH_O_CPU_TYPE_HPPA:
1151 *type = bfd_arch_hppa;
1152 break;
1153 case BFD_MACH_O_CPU_TYPE_ARM:
1154 *type = bfd_arch_arm;
1155 switch (msubtype)
1156 {
1157 case BFD_MACH_O_CPU_SUBTYPE_ARM_V4T:
1158 *subtype = bfd_mach_arm_4T;
1159 break;
1160 case BFD_MACH_O_CPU_SUBTYPE_ARM_V6:
1161 *subtype = bfd_mach_arm_4T; /* Best fit ? */
1162 break;
1163 case BFD_MACH_O_CPU_SUBTYPE_ARM_V5TEJ:
1164 *subtype = bfd_mach_arm_5TE;
1165 break;
1166 case BFD_MACH_O_CPU_SUBTYPE_ARM_XSCALE:
1167 *subtype = bfd_mach_arm_XScale;
1168 break;
1169 case BFD_MACH_O_CPU_SUBTYPE_ARM_V7:
1170 *subtype = bfd_mach_arm_5TE; /* Best fit ? */
1171 break;
1172 case BFD_MACH_O_CPU_SUBTYPE_ARM_ALL:
1173 default:
1174 break;
1175 }
1176 break;
1177 case BFD_MACH_O_CPU_TYPE_SPARC:
1178 *type = bfd_arch_sparc;
1179 *subtype = bfd_mach_sparc;
1180 break;
1181 case BFD_MACH_O_CPU_TYPE_ALPHA:
1182 *type = bfd_arch_alpha;
1183 break;
1184 case BFD_MACH_O_CPU_TYPE_POWERPC:
1185 *type = bfd_arch_powerpc;
1186 *subtype = bfd_mach_ppc;
1187 break;
1188 case BFD_MACH_O_CPU_TYPE_POWERPC_64:
1189 *type = bfd_arch_powerpc;
1190 *subtype = bfd_mach_ppc64;
1191 break;
1192 case BFD_MACH_O_CPU_TYPE_ARM64:
1193 *type = bfd_arch_aarch64;
1194 *subtype = bfd_mach_aarch64;
1195 break;
1196 default:
1197 *type = bfd_arch_unknown;
1198 break;
1199 }
1200}
1201
1202/* Write n NUL bytes to ABFD so that LEN + n is a multiple of 4. Return the
1203 number of bytes written or -1 in case of error. */
1204
1205static int
1206bfd_mach_o_pad4 (bfd *abfd, unsigned int len)
1207{
1208 if (len % 4 != 0)
1209 {
1210 char pad[4] = {0,0,0,0};
1211 unsigned int padlen = 4 - (len % 4);
1212
1213 if (bfd_bwrite (pad, padlen, abfd) != padlen)
1214 return -1;
1215
1216 return padlen;
1217 }
1218 else
1219 return 0;
1220}
1221
1222/* Likewise, but for a command. */
1223
1224static int
1225bfd_mach_o_pad_command (bfd *abfd, unsigned int len)
1226{
1227 unsigned int align = bfd_mach_o_wide_p (abfd) ? 8 : 4;
1228
1229 if (len % align != 0)
1230 {
1231 char pad[8] = {0};
1232 unsigned int padlen = align - (len % align);
1233
1234 if (bfd_bwrite (pad, padlen, abfd) != padlen)
1235 return -1;
1236
1237 return padlen;
1238 }
1239 else
1240 return 0;
1241}
1242
1243static bfd_boolean
1244bfd_mach_o_write_header (bfd *abfd, bfd_mach_o_header *header)
1245{
1246 struct mach_o_header_external raw;
1247 unsigned int size;
1248
1249 size = mach_o_wide_p (header) ?
1250 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
1251
1252 bfd_h_put_32 (abfd, header->magic, raw.magic);
1253 bfd_h_put_32 (abfd, header->cputype, raw.cputype);
1254 bfd_h_put_32 (abfd, header->cpusubtype, raw.cpusubtype);
1255 bfd_h_put_32 (abfd, header->filetype, raw.filetype);
1256 bfd_h_put_32 (abfd, header->ncmds, raw.ncmds);
1257 bfd_h_put_32 (abfd, header->sizeofcmds, raw.sizeofcmds);
1258 bfd_h_put_32 (abfd, header->flags, raw.flags);
1259
1260 if (mach_o_wide_p (header))
1261 bfd_h_put_32 (abfd, header->reserved, raw.reserved);
1262
1263 if (bfd_seek (abfd, 0, SEEK_SET) != 0
1264 || bfd_bwrite (&raw, size, abfd) != size)
1265 return FALSE;
1266
1267 return TRUE;
1268}
1269
1270static bfd_boolean
1271bfd_mach_o_write_thread (bfd *abfd, bfd_mach_o_load_command *command)
1272{
1273 bfd_mach_o_thread_command *cmd = &command->command.thread;
1274 unsigned int i;
1275 struct mach_o_thread_command_external raw;
1276 unsigned int offset;
1277
1278 BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD)
1279 || (command->type == BFD_MACH_O_LC_UNIXTHREAD));
1280
1281 offset = BFD_MACH_O_LC_SIZE;
1282 for (i = 0; i < cmd->nflavours; i++)
1283 {
1284 BFD_ASSERT ((cmd->flavours[i].size % 4) == 0);
1285 BFD_ASSERT (cmd->flavours[i].offset ==
1286 (command->offset + offset + BFD_MACH_O_LC_SIZE));
1287
1288 bfd_h_put_32 (abfd, cmd->flavours[i].flavour, raw.flavour);
1289 bfd_h_put_32 (abfd, (cmd->flavours[i].size / 4), raw.count);
1290
1291 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
1292 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1293 return FALSE;
1294
1295 offset += cmd->flavours[i].size + sizeof (raw);
1296 }
1297
1298 return TRUE;
1299}
1300
1301static bfd_boolean
1302bfd_mach_o_write_dylinker (bfd *abfd, bfd_mach_o_load_command *command)
1303{
1304 bfd_mach_o_dylinker_command *cmd = &command->command.dylinker;
1305 struct mach_o_str_command_external raw;
1306 unsigned int namelen;
1307
1308 bfd_h_put_32 (abfd, cmd->name_offset, raw.str);
1309
1310 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1311 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1312 return FALSE;
1313
1314 namelen = strlen (cmd->name_str) + 1;
1315 if (bfd_bwrite (cmd->name_str, namelen, abfd) != namelen)
1316 return FALSE;
1317
1318 if (bfd_mach_o_pad_command (abfd, namelen) < 0)
1319 return FALSE;
1320
1321 return TRUE;
1322}
1323
1324static bfd_boolean
1325bfd_mach_o_write_dylib (bfd *abfd, bfd_mach_o_load_command *command)
1326{
1327 bfd_mach_o_dylib_command *cmd = &command->command.dylib;
1328 struct mach_o_dylib_command_external raw;
1329 unsigned int namelen;
1330
1331 bfd_h_put_32 (abfd, cmd->name_offset, raw.name);
1332 bfd_h_put_32 (abfd, cmd->timestamp, raw.timestamp);
1333 bfd_h_put_32 (abfd, cmd->current_version, raw.current_version);
1334 bfd_h_put_32 (abfd, cmd->compatibility_version, raw.compatibility_version);
1335
1336 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1337 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1338 return FALSE;
1339
1340 namelen = strlen (cmd->name_str) + 1;
1341 if (bfd_bwrite (cmd->name_str, namelen, abfd) != namelen)
1342 return FALSE;
1343
1344 if (bfd_mach_o_pad_command (abfd, namelen) < 0)
1345 return FALSE;
1346
1347 return TRUE;
1348}
1349
1350static bfd_boolean
1351bfd_mach_o_write_main (bfd *abfd, bfd_mach_o_load_command *command)
1352{
1353 bfd_mach_o_main_command *cmd = &command->command.main;
1354 struct mach_o_entry_point_command_external raw;
1355
1356 bfd_h_put_64 (abfd, cmd->entryoff, raw.entryoff);
1357 bfd_h_put_64 (abfd, cmd->stacksize, raw.stacksize);
1358
1359 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1360 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1361 return FALSE;
1362
1363 return TRUE;
1364}
1365
1366static bfd_boolean
1367bfd_mach_o_write_dyld_info (bfd *abfd, bfd_mach_o_load_command *command)
1368{
1369 bfd_mach_o_dyld_info_command *cmd = &command->command.dyld_info;
1370 struct mach_o_dyld_info_command_external raw;
1371
1372 bfd_h_put_32 (abfd, cmd->rebase_off, raw.rebase_off);
1373 bfd_h_put_32 (abfd, cmd->rebase_size, raw.rebase_size);
1374 bfd_h_put_32 (abfd, cmd->bind_off, raw.bind_off);
1375 bfd_h_put_32 (abfd, cmd->bind_size, raw.bind_size);
1376 bfd_h_put_32 (abfd, cmd->weak_bind_off, raw.weak_bind_off);
1377 bfd_h_put_32 (abfd, cmd->weak_bind_size, raw.weak_bind_size);
1378 bfd_h_put_32 (abfd, cmd->lazy_bind_off, raw.lazy_bind_off);
1379 bfd_h_put_32 (abfd, cmd->lazy_bind_size, raw.lazy_bind_size);
1380 bfd_h_put_32 (abfd, cmd->export_off, raw.export_off);
1381 bfd_h_put_32 (abfd, cmd->export_size, raw.export_size);
1382
1383 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1384 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1385 return FALSE;
1386
1387 if (cmd->rebase_size != 0)
1388 if (bfd_seek (abfd, cmd->rebase_off, SEEK_SET) != 0
1389 || (bfd_bwrite (cmd->rebase_content, cmd->rebase_size, abfd) !=
1390 cmd->rebase_size))
1391 return FALSE;
1392
1393 if (cmd->bind_size != 0)
1394 if (bfd_seek (abfd, cmd->bind_off, SEEK_SET) != 0
1395 || (bfd_bwrite (cmd->bind_content, cmd->bind_size, abfd) !=
1396 cmd->bind_size))
1397 return FALSE;
1398
1399 if (cmd->weak_bind_size != 0)
1400 if (bfd_seek (abfd, cmd->weak_bind_off, SEEK_SET) != 0
1401 || (bfd_bwrite (cmd->weak_bind_content, cmd->weak_bind_size, abfd) !=
1402 cmd->weak_bind_size))
1403 return FALSE;
1404
1405 if (cmd->lazy_bind_size != 0)
1406 if (bfd_seek (abfd, cmd->lazy_bind_off, SEEK_SET) != 0
1407 || (bfd_bwrite (cmd->lazy_bind_content, cmd->lazy_bind_size, abfd) !=
1408 cmd->lazy_bind_size))
1409 return FALSE;
1410
1411 if (cmd->export_size != 0)
1412 if (bfd_seek (abfd, cmd->export_off, SEEK_SET) != 0
1413 || (bfd_bwrite (cmd->export_content, cmd->export_size, abfd) !=
1414 cmd->export_size))
1415 return FALSE;
1416
1417 return TRUE;
1418}
1419
1420long
1421bfd_mach_o_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
1422 asection *asect)
1423{
1424#if SIZEOF_LONG == SIZEOF_INT
1425 if (asect->reloc_count >= LONG_MAX / sizeof (arelent *))
1426 {
1427 bfd_set_error (bfd_error_file_too_big);
1428 return -1;
1429 }
1430#endif
1431 return (asect->reloc_count + 1) * sizeof (arelent *);
1432}
1433
1434/* In addition to the need to byte-swap the symbol number, the bit positions
1435 of the fields in the relocation information vary per target endian-ness. */
1436
1437void
1438bfd_mach_o_swap_in_non_scattered_reloc (bfd *abfd, bfd_mach_o_reloc_info *rel,
1439 unsigned char *fields)
1440{
1441 unsigned char info = fields[3];
1442
1443 if (bfd_big_endian (abfd))
1444 {
1445 rel->r_value = (fields[0] << 16) | (fields[1] << 8) | fields[2];
1446 rel->r_type = (info >> BFD_MACH_O_BE_TYPE_SHIFT) & BFD_MACH_O_TYPE_MASK;
1447 rel->r_pcrel = (info & BFD_MACH_O_BE_PCREL) ? 1 : 0;
1448 rel->r_length = (info >> BFD_MACH_O_BE_LENGTH_SHIFT)
1449 & BFD_MACH_O_LENGTH_MASK;
1450 rel->r_extern = (info & BFD_MACH_O_BE_EXTERN) ? 1 : 0;
1451 }
1452 else
1453 {
1454 rel->r_value = (fields[2] << 16) | (fields[1] << 8) | fields[0];
1455 rel->r_type = (info >> BFD_MACH_O_LE_TYPE_SHIFT) & BFD_MACH_O_TYPE_MASK;
1456 rel->r_pcrel = (info & BFD_MACH_O_LE_PCREL) ? 1 : 0;
1457 rel->r_length = (info >> BFD_MACH_O_LE_LENGTH_SHIFT)
1458 & BFD_MACH_O_LENGTH_MASK;
1459 rel->r_extern = (info & BFD_MACH_O_LE_EXTERN) ? 1 : 0;
1460 }
1461}
1462
1463/* Set syms_ptr_ptr and addend of RES. */
1464
1465bfd_boolean
1466bfd_mach_o_canonicalize_non_scattered_reloc (bfd *abfd,
1467 bfd_mach_o_reloc_info *reloc,
1468 arelent *res, asymbol **syms)
1469{
1470 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1471 unsigned int num;
1472 asymbol **sym;
1473
1474 /* Non-scattered relocation. */
1475 reloc->r_scattered = 0;
1476 res->addend = 0;
1477
1478 num = reloc->r_value;
1479
1480 if (reloc->r_extern)
1481 {
1482 /* PR 17512: file: 8396-1185-0.004. */
1483 if (num >= (unsigned) bfd_mach_o_count_symbols (abfd))
1484 sym = bfd_und_section_ptr->symbol_ptr_ptr;
1485 else if (syms == NULL)
1486 sym = bfd_und_section_ptr->symbol_ptr_ptr;
1487 else
1488 /* An external symbol number. */
1489 sym = syms + num;
1490 }
1491 else if (num == 0x00ffffff || num == 0)
1492 {
1493 /* The 'symnum' in a non-scattered PAIR is 0x00ffffff. But as this
1494 is generic code, we don't know wether this is really a PAIR.
1495 This value is almost certainly not a valid section number, hence
1496 this specific case to avoid an assertion failure.
1497 Target specific swap_reloc_in routine should adjust that. */
1498 sym = bfd_abs_section_ptr->symbol_ptr_ptr;
1499 }
1500 else
1501 {
1502 /* PR 17512: file: 006-2964-0.004. */
1503 if (num > mdata->nsects)
1504 {
1505 _bfd_error_handler (_("\
1506malformed mach-o reloc: section index is greater than the number of sections"));
1507 return FALSE;
1508 }
1509
1510 /* A section number. */
1511 sym = mdata->sections[num - 1]->bfdsection->symbol_ptr_ptr;
1512 /* For a symbol defined in section S, the addend (stored in the
1513 binary) contains the address of the section. To comply with
1514 bfd convention, subtract the section address.
1515 Use the address from the header, so that the user can modify
1516 the vma of the section. */
1517 res->addend = -mdata->sections[num - 1]->addr;
1518 }
1519
1520 /* Note: Pairs for PPC LO/HI/HA are not scattered, but contain the offset
1521 in the lower 16bits of the address value. So we have to find the
1522 'symbol' from the preceding reloc. We do this even though the
1523 section symbol is probably not needed here, because NULL symbol
1524 values cause an assert in generic BFD code. This must be done in
1525 the PPC swap_reloc_in routine. */
1526 res->sym_ptr_ptr = sym;
1527
1528 return TRUE;
1529}
1530
1531/* Do most of the work for canonicalize_relocs on RAW: create internal
1532 representation RELOC and set most fields of RES using symbol table SYMS.
1533 Each target still has to set the howto of RES and possibly adjust other
1534 fields.
1535 Previously the Mach-O hook point was simply swap_in, but some targets
1536 (like arm64) don't follow the generic rules (symnum is a value for the
1537 non-scattered relocation ADDEND). */
1538
1539bfd_boolean
1540bfd_mach_o_pre_canonicalize_one_reloc (bfd *abfd,
1541 struct mach_o_reloc_info_external *raw,
1542 bfd_mach_o_reloc_info *reloc,
1543 arelent *res, asymbol **syms)
1544{
1545 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1546 bfd_vma addr;
1547
1548 addr = bfd_get_32 (abfd, raw->r_address);
1549 res->sym_ptr_ptr = NULL;
1550 res->addend = 0;
1551
1552 if (addr & BFD_MACH_O_SR_SCATTERED)
1553 {
1554 unsigned int j;
1555 bfd_vma symnum = bfd_get_32 (abfd, raw->r_symbolnum);
1556
1557 /* Scattered relocation, can't be extern. */
1558 reloc->r_scattered = 1;
1559 reloc->r_extern = 0;
1560
1561 /* Extract section and offset from r_value (symnum). */
1562 reloc->r_value = symnum;
1563 /* FIXME: This breaks when a symbol in a reloc exactly follows the
1564 end of the data for the section (e.g. in a calculation of section
1565 data length). At present, the symbol will end up associated with
1566 the following section or, if it falls within alignment padding, as
1567 null - which will assert later. */
1568 for (j = 0; j < mdata->nsects; j++)
1569 {
1570 bfd_mach_o_section *sect = mdata->sections[j];
1571 if (symnum >= sect->addr && symnum < sect->addr + sect->size)
1572 {
1573 res->sym_ptr_ptr = sect->bfdsection->symbol_ptr_ptr;
1574 res->addend = symnum - sect->addr;
1575 break;
1576 }
1577 }
1578
1579 /* Extract the info and address fields from r_address. */
1580 reloc->r_type = BFD_MACH_O_GET_SR_TYPE (addr);
1581 reloc->r_length = BFD_MACH_O_GET_SR_LENGTH (addr);
1582 reloc->r_pcrel = addr & BFD_MACH_O_SR_PCREL;
1583 reloc->r_address = BFD_MACH_O_GET_SR_TYPE (addr);
1584 res->address = BFD_MACH_O_GET_SR_ADDRESS (addr);
1585 }
1586 else
1587 {
1588 /* Non-scattered relocation. */
1589 reloc->r_scattered = 0;
1590 reloc->r_address = addr;
1591 res->address = addr;
1592
1593 /* The value and info fields have to be extracted dependent on target
1594 endian-ness. */
1595 bfd_mach_o_swap_in_non_scattered_reloc (abfd, reloc, raw->r_symbolnum);
1596
1597 if (!bfd_mach_o_canonicalize_non_scattered_reloc (abfd, reloc,
1598 res, syms))
1599 return FALSE;
1600 }
1601
1602 /* We have set up a reloc with all the information present, so the swapper
1603 can modify address, value and addend fields, if necessary, to convey
1604 information in the generic BFD reloc that is mach-o specific. */
1605
1606 return TRUE;
1607}
1608
1609static int
1610bfd_mach_o_canonicalize_relocs (bfd *abfd, unsigned long filepos,
1611 unsigned long count,
1612 arelent *res, asymbol **syms)
1613{
1614 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1615 unsigned long i;
1616 struct mach_o_reloc_info_external *native_relocs = NULL;
1617 bfd_size_type native_size;
1618
1619 /* Allocate and read relocs. */
1620 native_size = count * BFD_MACH_O_RELENT_SIZE;
1621
1622 /* PR 17512: file: 09477b57. */
1623 if (native_size < count)
1624 goto err;
1625
1626 if (bfd_seek (abfd, filepos, SEEK_SET) != 0)
1627 return -1;
1628 native_relocs = (struct mach_o_reloc_info_external *)
1629 _bfd_malloc_and_read (abfd, native_size, native_size);
1630 if (native_relocs == NULL)
1631 return -1;
1632
1633 for (i = 0; i < count; i++)
1634 {
1635 if (!(*bed->_bfd_mach_o_canonicalize_one_reloc)(abfd, &native_relocs[i],
1636 &res[i], syms, res))
1637 goto err;
1638 }
1639 free (native_relocs);
1640 return i;
1641
1642 err:
1643 free (native_relocs);
1644 if (bfd_get_error () == bfd_error_no_error)
1645 bfd_set_error (bfd_error_invalid_operation);
1646 return -1;
1647}
1648
1649long
1650bfd_mach_o_canonicalize_reloc (bfd *abfd, asection *asect,
1651 arelent **rels, asymbol **syms)
1652{
1653 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1654 unsigned long i;
1655 arelent *res;
1656
1657 if (asect->reloc_count == 0)
1658 return 0;
1659
1660 /* No need to go further if we don't know how to read relocs. */
1661 if (bed->_bfd_mach_o_canonicalize_one_reloc == NULL)
1662 return 0;
1663
1664 if (asect->relocation == NULL)
1665 {
1666 if (asect->reloc_count * sizeof (arelent) < asect->reloc_count)
1667 return -1;
1668 res = bfd_malloc (asect->reloc_count * sizeof (arelent));
1669 if (res == NULL)
1670 return -1;
1671
1672 if (bfd_mach_o_canonicalize_relocs (abfd, asect->rel_filepos,
1673 asect->reloc_count, res, syms) < 0)
1674 {
1675 free (res);
1676 return -1;
1677 }
1678 asect->relocation = res;
1679 }
1680
1681 res = asect->relocation;
1682 for (i = 0; i < asect->reloc_count; i++)
1683 rels[i] = &res[i];
1684 rels[i] = NULL;
1685
1686 return i;
1687}
1688
1689long
1690bfd_mach_o_get_dynamic_reloc_upper_bound (bfd *abfd)
1691{
1692 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1693
1694 if (mdata->dysymtab == NULL)
1695 return 1;
1696 return (mdata->dysymtab->nextrel + mdata->dysymtab->nlocrel + 1)
1697 * sizeof (arelent *);
1698}
1699
1700long
1701bfd_mach_o_canonicalize_dynamic_reloc (bfd *abfd, arelent **rels,
1702 struct bfd_symbol **syms)
1703{
1704 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1705 bfd_mach_o_dysymtab_command *dysymtab = mdata->dysymtab;
1706 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1707 unsigned long i;
1708 arelent *res;
1709
1710 if (dysymtab == NULL)
1711 return 0;
1712 if (dysymtab->nextrel == 0 && dysymtab->nlocrel == 0)
1713 return 0;
1714
1715 /* No need to go further if we don't know how to read relocs. */
1716 if (bed->_bfd_mach_o_canonicalize_one_reloc == NULL)
1717 return 0;
1718
1719 if (mdata->dyn_reloc_cache == NULL)
1720 {
1721 if ((dysymtab->nextrel + dysymtab->nlocrel) * sizeof (arelent)
1722 < (dysymtab->nextrel + dysymtab->nlocrel))
1723 return -1;
1724
1725 res = bfd_malloc ((dysymtab->nextrel + dysymtab->nlocrel)
1726 * sizeof (arelent));
1727 if (res == NULL)
1728 return -1;
1729
1730 if (bfd_mach_o_canonicalize_relocs (abfd, dysymtab->extreloff,
1731 dysymtab->nextrel, res, syms) < 0)
1732 {
1733 free (res);
1734 return -1;
1735 }
1736
1737 if (bfd_mach_o_canonicalize_relocs (abfd, dysymtab->locreloff,
1738 dysymtab->nlocrel,
1739 res + dysymtab->nextrel, syms) < 0)
1740 {
1741 free (res);
1742 return -1;
1743 }
1744
1745 mdata->dyn_reloc_cache = res;
1746 }
1747
1748 res = mdata->dyn_reloc_cache;
1749 for (i = 0; i < dysymtab->nextrel + dysymtab->nlocrel; i++)
1750 rels[i] = &res[i];
1751 rels[i] = NULL;
1752 return i;
1753}
1754
1755/* In addition to the need to byte-swap the symbol number, the bit positions
1756 of the fields in the relocation information vary per target endian-ness. */
1757
1758static void
1759bfd_mach_o_swap_out_non_scattered_reloc (bfd *abfd, unsigned char *fields,
1760 bfd_mach_o_reloc_info *rel)
1761{
1762 unsigned char info = 0;
1763
1764 BFD_ASSERT (rel->r_type <= 15);
1765 BFD_ASSERT (rel->r_length <= 3);
1766
1767 if (bfd_big_endian (abfd))
1768 {
1769 fields[0] = (rel->r_value >> 16) & 0xff;
1770 fields[1] = (rel->r_value >> 8) & 0xff;
1771 fields[2] = rel->r_value & 0xff;
1772 info |= rel->r_type << BFD_MACH_O_BE_TYPE_SHIFT;
1773 info |= rel->r_pcrel ? BFD_MACH_O_BE_PCREL : 0;
1774 info |= rel->r_length << BFD_MACH_O_BE_LENGTH_SHIFT;
1775 info |= rel->r_extern ? BFD_MACH_O_BE_EXTERN : 0;
1776 }
1777 else
1778 {
1779 fields[2] = (rel->r_value >> 16) & 0xff;
1780 fields[1] = (rel->r_value >> 8) & 0xff;
1781 fields[0] = rel->r_value & 0xff;
1782 info |= rel->r_type << BFD_MACH_O_LE_TYPE_SHIFT;
1783 info |= rel->r_pcrel ? BFD_MACH_O_LE_PCREL : 0;
1784 info |= rel->r_length << BFD_MACH_O_LE_LENGTH_SHIFT;
1785 info |= rel->r_extern ? BFD_MACH_O_LE_EXTERN : 0;
1786 }
1787 fields[3] = info;
1788}
1789
1790static bfd_boolean
1791bfd_mach_o_write_relocs (bfd *abfd, bfd_mach_o_section *section)
1792{
1793 unsigned int i;
1794 arelent **entries;
1795 asection *sec;
1796 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1797
1798 sec = section->bfdsection;
1799 if (sec->reloc_count == 0)
1800 return TRUE;
1801
1802 if (bed->_bfd_mach_o_swap_reloc_out == NULL)
1803 return TRUE;
1804
1805 if (bfd_seek (abfd, section->reloff, SEEK_SET) != 0)
1806 return FALSE;
1807
1808 /* Convert and write. */
1809 entries = section->bfdsection->orelocation;
1810 for (i = 0; i < section->nreloc; i++)
1811 {
1812 arelent *rel = entries[i];
1813 struct mach_o_reloc_info_external raw;
1814 bfd_mach_o_reloc_info info, *pinfo = &info;
1815
1816 /* Convert relocation to an intermediate representation. */
1817 if (!(*bed->_bfd_mach_o_swap_reloc_out) (rel, pinfo))
1818 return FALSE;
1819
1820 /* Lower the relocation info. */
1821 if (pinfo->r_scattered)
1822 {
1823 unsigned long v;
1824
1825 v = BFD_MACH_O_SR_SCATTERED
1826 | (pinfo->r_pcrel ? BFD_MACH_O_SR_PCREL : 0)
1827 | BFD_MACH_O_SET_SR_LENGTH (pinfo->r_length)
1828 | BFD_MACH_O_SET_SR_TYPE (pinfo->r_type)
1829 | BFD_MACH_O_SET_SR_ADDRESS (pinfo->r_address);
1830 /* Note: scattered relocs have field in reverse order... */
1831 bfd_put_32 (abfd, v, raw.r_address);
1832 bfd_put_32 (abfd, pinfo->r_value, raw.r_symbolnum);
1833 }
1834 else
1835 {
1836 bfd_put_32 (abfd, pinfo->r_address, raw.r_address);
1837 bfd_mach_o_swap_out_non_scattered_reloc (abfd, raw.r_symbolnum,
1838 pinfo);
1839 }
1840
1841 if (bfd_bwrite (&raw, BFD_MACH_O_RELENT_SIZE, abfd)
1842 != BFD_MACH_O_RELENT_SIZE)
1843 return FALSE;
1844 }
1845 return TRUE;
1846}
1847
1848static bfd_boolean
1849bfd_mach_o_write_section_32 (bfd *abfd, bfd_mach_o_section *section)
1850{
1851 struct mach_o_section_32_external raw;
1852
1853 memcpy (raw.sectname, section->sectname, 16);
1854 memcpy (raw.segname, section->segname, 16);
1855 bfd_h_put_32 (abfd, section->addr, raw.addr);
1856 bfd_h_put_32 (abfd, section->size, raw.size);
1857 bfd_h_put_32 (abfd, section->offset, raw.offset);
1858 bfd_h_put_32 (abfd, section->align, raw.align);
1859 bfd_h_put_32 (abfd, section->reloff, raw.reloff);
1860 bfd_h_put_32 (abfd, section->nreloc, raw.nreloc);
1861 bfd_h_put_32 (abfd, section->flags, raw.flags);
1862 bfd_h_put_32 (abfd, section->reserved1, raw.reserved1);
1863 bfd_h_put_32 (abfd, section->reserved2, raw.reserved2);
1864
1865 if (bfd_bwrite (&raw, BFD_MACH_O_SECTION_SIZE, abfd)
1866 != BFD_MACH_O_SECTION_SIZE)
1867 return FALSE;
1868
1869 return TRUE;
1870}
1871
1872static bfd_boolean
1873bfd_mach_o_write_section_64 (bfd *abfd, bfd_mach_o_section *section)
1874{
1875 struct mach_o_section_64_external raw;
1876
1877 memcpy (raw.sectname, section->sectname, 16);
1878 memcpy (raw.segname, section->segname, 16);
1879 bfd_h_put_64 (abfd, section->addr, raw.addr);
1880 bfd_h_put_64 (abfd, section->size, raw.size);
1881 bfd_h_put_32 (abfd, section->offset, raw.offset);
1882 bfd_h_put_32 (abfd, section->align, raw.align);
1883 bfd_h_put_32 (abfd, section->reloff, raw.reloff);
1884 bfd_h_put_32 (abfd, section->nreloc, raw.nreloc);
1885 bfd_h_put_32 (abfd, section->flags, raw.flags);
1886 bfd_h_put_32 (abfd, section->reserved1, raw.reserved1);
1887 bfd_h_put_32 (abfd, section->reserved2, raw.reserved2);
1888 bfd_h_put_32 (abfd, section->reserved3, raw.reserved3);
1889
1890 if (bfd_bwrite (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd)
1891 != BFD_MACH_O_SECTION_64_SIZE)
1892 return FALSE;
1893
1894 return TRUE;
1895}
1896
1897static bfd_boolean
1898bfd_mach_o_write_segment_32 (bfd *abfd, bfd_mach_o_load_command *command)
1899{
1900 struct mach_o_segment_command_32_external raw;
1901 bfd_mach_o_segment_command *seg = &command->command.segment;
1902 bfd_mach_o_section *sec;
1903
1904 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT);
1905
1906 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1907 if (!bfd_mach_o_write_relocs (abfd, sec))
1908 return FALSE;
1909
1910 memcpy (raw.segname, seg->segname, 16);
1911 bfd_h_put_32 (abfd, seg->vmaddr, raw.vmaddr);
1912 bfd_h_put_32 (abfd, seg->vmsize, raw.vmsize);
1913 bfd_h_put_32 (abfd, seg->fileoff, raw.fileoff);
1914 bfd_h_put_32 (abfd, seg->filesize, raw.filesize);
1915 bfd_h_put_32 (abfd, seg->maxprot, raw.maxprot);
1916 bfd_h_put_32 (abfd, seg->initprot, raw.initprot);
1917 bfd_h_put_32 (abfd, seg->nsects, raw.nsects);
1918 bfd_h_put_32 (abfd, seg->flags, raw.flags);
1919
1920 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1921 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1922 return FALSE;
1923
1924 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1925 if (!bfd_mach_o_write_section_32 (abfd, sec))
1926 return FALSE;
1927
1928 return TRUE;
1929}
1930
1931static bfd_boolean
1932bfd_mach_o_write_segment_64 (bfd *abfd, bfd_mach_o_load_command *command)
1933{
1934 struct mach_o_segment_command_64_external raw;
1935 bfd_mach_o_segment_command *seg = &command->command.segment;
1936 bfd_mach_o_section *sec;
1937
1938 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64);
1939
1940 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1941 if (!bfd_mach_o_write_relocs (abfd, sec))
1942 return FALSE;
1943
1944 memcpy (raw.segname, seg->segname, 16);
1945 bfd_h_put_64 (abfd, seg->vmaddr, raw.vmaddr);
1946 bfd_h_put_64 (abfd, seg->vmsize, raw.vmsize);
1947 bfd_h_put_64 (abfd, seg->fileoff, raw.fileoff);
1948 bfd_h_put_64 (abfd, seg->filesize, raw.filesize);
1949 bfd_h_put_32 (abfd, seg->maxprot, raw.maxprot);
1950 bfd_h_put_32 (abfd, seg->initprot, raw.initprot);
1951 bfd_h_put_32 (abfd, seg->nsects, raw.nsects);
1952 bfd_h_put_32 (abfd, seg->flags, raw.flags);
1953
1954 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1955 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1956 return FALSE;
1957
1958 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1959 if (!bfd_mach_o_write_section_64 (abfd, sec))
1960 return FALSE;
1961
1962 return TRUE;
1963}
1964
1965static bfd_boolean
1966bfd_mach_o_write_symtab_content (bfd *abfd, bfd_mach_o_symtab_command *sym)
1967{
1968 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1969 unsigned long i;
1970 unsigned int wide = bfd_mach_o_wide_p (abfd);
1971 struct bfd_strtab_hash *strtab;
1972 asymbol **symbols = bfd_get_outsymbols (abfd);
1973 int padlen;
1974
1975 /* Write the symbols first. */
1976 if (bfd_seek (abfd, sym->symoff, SEEK_SET) != 0)
1977 return FALSE;
1978
1979 strtab = _bfd_stringtab_init ();
1980 if (strtab == NULL)
1981 return FALSE;
1982
1983 if (sym->nsyms > 0)
1984 /* Although we don't strictly need to do this, for compatibility with
1985 Darwin system tools, actually output an empty string for the index
1986 0 entry. */
1987 _bfd_stringtab_add (strtab, "", TRUE, FALSE);
1988
1989 for (i = 0; i < sym->nsyms; i++)
1990 {
1991 bfd_size_type str_index;
1992 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
1993
1994 if (s->symbol.name == 0 || s->symbol.name[0] == '\0')
1995 /* An index of 0 always means the empty string. */
1996 str_index = 0;
1997 else
1998 {
1999 str_index = _bfd_stringtab_add (strtab, s->symbol.name, TRUE, FALSE);
2000
2001 if (str_index == (bfd_size_type) -1)
2002 goto err;
2003 }
2004
2005 if (wide)
2006 {
2007 struct mach_o_nlist_64_external raw;
2008
2009 bfd_h_put_32 (abfd, str_index, raw.n_strx);
2010 bfd_h_put_8 (abfd, s->n_type, raw.n_type);
2011 bfd_h_put_8 (abfd, s->n_sect, raw.n_sect);
2012 bfd_h_put_16 (abfd, s->n_desc, raw.n_desc);
2013 bfd_h_put_64 (abfd, s->symbol.section->vma + s->symbol.value,
2014 raw.n_value);
2015
2016 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
2017 goto err;
2018 }
2019 else
2020 {
2021 struct mach_o_nlist_external raw;
2022
2023 bfd_h_put_32 (abfd, str_index, raw.n_strx);
2024 bfd_h_put_8 (abfd, s->n_type, raw.n_type);
2025 bfd_h_put_8 (abfd, s->n_sect, raw.n_sect);
2026 bfd_h_put_16 (abfd, s->n_desc, raw.n_desc);
2027 bfd_h_put_32 (abfd, s->symbol.section->vma + s->symbol.value,
2028 raw.n_value);
2029
2030 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
2031 goto err;
2032 }
2033 }
2034 sym->strsize = _bfd_stringtab_size (strtab);
2035 sym->stroff = mdata->filelen;
2036 mdata->filelen += sym->strsize;
2037
2038 if (bfd_seek (abfd, sym->stroff, SEEK_SET) != 0)
2039 goto err;
2040
2041 if (!_bfd_stringtab_emit (abfd, strtab))
2042 goto err;
2043
2044 /* Pad string table. */
2045 padlen = bfd_mach_o_pad4 (abfd, sym->strsize);
2046 if (padlen < 0)
2047 return FALSE;
2048 mdata->filelen += padlen;
2049 sym->strsize += padlen;
2050
2051 return TRUE;
2052
2053 err:
2054 _bfd_stringtab_free (strtab);
2055 sym->strsize = 0;
2056 return FALSE;
2057}
2058
2059static bfd_boolean
2060bfd_mach_o_write_symtab (bfd *abfd, bfd_mach_o_load_command *command)
2061{
2062 bfd_mach_o_symtab_command *sym = &command->command.symtab;
2063 struct mach_o_symtab_command_external raw;
2064
2065 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB);
2066
2067 /* The command. */
2068 bfd_h_put_32 (abfd, sym->symoff, raw.symoff);
2069 bfd_h_put_32 (abfd, sym->nsyms, raw.nsyms);
2070 bfd_h_put_32 (abfd, sym->stroff, raw.stroff);
2071 bfd_h_put_32 (abfd, sym->strsize, raw.strsize);
2072
2073 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
2074 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
2075 return FALSE;
2076
2077 return TRUE;
2078}
2079
2080/* Count the number of indirect symbols in the image.
2081 Requires that the sections are in their final order. */
2082
2083static unsigned int
2084bfd_mach_o_count_indirect_symbols (bfd *abfd, bfd_mach_o_data_struct *mdata)
2085{
2086 unsigned int i;
2087 unsigned int nisyms = 0;
2088
2089 for (i = 0; i < mdata->nsects; ++i)
2090 {
2091 bfd_mach_o_section *sec = mdata->sections[i];
2092
2093 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2094 {
2095 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
2096 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
2097 case BFD_MACH_O_S_SYMBOL_STUBS:
2098 nisyms += bfd_mach_o_section_get_nbr_indirect (abfd, sec);
2099 break;
2100 default:
2101 break;
2102 }
2103 }
2104 return nisyms;
2105}
2106
2107/* Create the dysymtab. */
2108
2109static bfd_boolean
2110bfd_mach_o_build_dysymtab (bfd *abfd, bfd_mach_o_dysymtab_command *cmd)
2111{
2112 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2113
2114 /* TODO:
2115 We are not going to try and fill these in yet and, moreover, we are
2116 going to bail if they are already set. */
2117 if (cmd->nmodtab != 0
2118 || cmd->ntoc != 0
2119 || cmd->nextrefsyms != 0)
2120 {
2121 _bfd_error_handler (_("sorry: modtab, toc and extrefsyms are not yet"
2122 " implemented for dysymtab commands."));
2123 return FALSE;
2124 }
2125
2126 cmd->ilocalsym = 0;
2127
2128 if (bfd_get_symcount (abfd) > 0)
2129 {
2130 asymbol **symbols = bfd_get_outsymbols (abfd);
2131 unsigned long i;
2132
2133 /* Count the number of each kind of symbol. */
2134 for (i = 0; i < bfd_get_symcount (abfd); ++i)
2135 {
2136 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2137 if (s->n_type & (BFD_MACH_O_N_EXT | BFD_MACH_O_N_PEXT))
2138 break;
2139 }
2140 cmd->nlocalsym = i;
2141 cmd->iextdefsym = i;
2142 for (; i < bfd_get_symcount (abfd); ++i)
2143 {
2144 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2145 if ((s->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_UNDF)
2146 break;
2147 }
2148 cmd->nextdefsym = i - cmd->nlocalsym;
2149 cmd->iundefsym = cmd->nextdefsym + cmd->iextdefsym;
2150 cmd->nundefsym = bfd_get_symcount (abfd)
2151 - cmd->nlocalsym
2152 - cmd->nextdefsym;
2153 }
2154 else
2155 {
2156 cmd->nlocalsym = 0;
2157 cmd->iextdefsym = 0;
2158 cmd->nextdefsym = 0;
2159 cmd->iundefsym = 0;
2160 cmd->nundefsym = 0;
2161 }
2162
2163 cmd->nindirectsyms = bfd_mach_o_count_indirect_symbols (abfd, mdata);
2164 if (cmd->nindirectsyms > 0)
2165 {
2166 unsigned i;
2167 unsigned n;
2168
2169 mdata->filelen = FILE_ALIGN (mdata->filelen, 2);
2170 cmd->indirectsymoff = mdata->filelen;
2171 mdata->filelen += cmd->nindirectsyms * 4;
2172
2173 if (cmd->nindirectsyms * 4 < cmd->nindirectsyms)
2174 return FALSE;
2175 cmd->indirect_syms = bfd_zalloc (abfd, cmd->nindirectsyms * 4);
2176 if (cmd->indirect_syms == NULL)
2177 return FALSE;
2178
2179 n = 0;
2180 for (i = 0; i < mdata->nsects; ++i)
2181 {
2182 bfd_mach_o_section *sec = mdata->sections[i];
2183
2184 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2185 {
2186 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
2187 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
2188 case BFD_MACH_O_S_SYMBOL_STUBS:
2189 {
2190 unsigned j, num;
2191 bfd_mach_o_asymbol **isyms = sec->indirect_syms;
2192
2193 num = bfd_mach_o_section_get_nbr_indirect (abfd, sec);
2194 if (isyms == NULL || num == 0)
2195 break;
2196 /* Record the starting index in the reserved1 field. */
2197 sec->reserved1 = n;
2198 for (j = 0; j < num; j++, n++)
2199 {
2200 if (isyms[j] == NULL)
2201 cmd->indirect_syms[n] = BFD_MACH_O_INDIRECT_SYM_LOCAL;
2202 else if (isyms[j]->symbol.section == bfd_abs_section_ptr
2203 && ! (isyms[j]->n_type & BFD_MACH_O_N_EXT))
2204 cmd->indirect_syms[n] = BFD_MACH_O_INDIRECT_SYM_LOCAL
2205 | BFD_MACH_O_INDIRECT_SYM_ABS;
2206 else
2207 cmd->indirect_syms[n] = isyms[j]->symbol.udata.i;
2208 }
2209 }
2210 break;
2211 default:
2212 break;
2213 }
2214 }
2215 }
2216
2217 return TRUE;
2218}
2219
2220/* Write a dysymtab command.
2221 TODO: Possibly coalesce writes of smaller objects. */
2222
2223static bfd_boolean
2224bfd_mach_o_write_dysymtab (bfd *abfd, bfd_mach_o_load_command *command)
2225{
2226 bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab;
2227
2228 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB);
2229
2230 if (cmd->nmodtab != 0)
2231 {
2232 unsigned int i;
2233
2234 if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0)
2235 return FALSE;
2236
2237 for (i = 0; i < cmd->nmodtab; i++)
2238 {
2239 bfd_mach_o_dylib_module *module = &cmd->dylib_module[i];
2240 unsigned int iinit;
2241 unsigned int ninit;
2242
2243 iinit = module->iinit & 0xffff;
2244 iinit |= ((module->iterm & 0xffff) << 16);
2245
2246 ninit = module->ninit & 0xffff;
2247 ninit |= ((module->nterm & 0xffff) << 16);
2248
2249 if (bfd_mach_o_wide_p (abfd))
2250 {
2251 struct mach_o_dylib_module_64_external w;
2252
2253 bfd_h_put_32 (abfd, module->module_name_idx, &w.module_name);
2254 bfd_h_put_32 (abfd, module->iextdefsym, &w.iextdefsym);
2255 bfd_h_put_32 (abfd, module->nextdefsym, &w.nextdefsym);
2256 bfd_h_put_32 (abfd, module->irefsym, &w.irefsym);
2257 bfd_h_put_32 (abfd, module->nrefsym, &w.nrefsym);
2258 bfd_h_put_32 (abfd, module->ilocalsym, &w.ilocalsym);
2259 bfd_h_put_32 (abfd, module->nlocalsym, &w.nlocalsym);
2260 bfd_h_put_32 (abfd, module->iextrel, &w.iextrel);
2261 bfd_h_put_32 (abfd, module->nextrel, &w.nextrel);
2262 bfd_h_put_32 (abfd, iinit, &w.iinit_iterm);
2263 bfd_h_put_32 (abfd, ninit, &w.ninit_nterm);
2264 bfd_h_put_64 (abfd, module->objc_module_info_addr,
2265 &w.objc_module_info_addr);
2266 bfd_h_put_32 (abfd, module->objc_module_info_size,
2267 &w.objc_module_info_size);
2268
2269 if (bfd_bwrite ((void *) &w, sizeof (w), abfd) != sizeof (w))
2270 return FALSE;
2271 }
2272 else
2273 {
2274 struct mach_o_dylib_module_external n;
2275
2276 bfd_h_put_32 (abfd, module->module_name_idx, &n.module_name);
2277 bfd_h_put_32 (abfd, module->iextdefsym, &n.iextdefsym);
2278 bfd_h_put_32 (abfd, module->nextdefsym, &n.nextdefsym);
2279 bfd_h_put_32 (abfd, module->irefsym, &n.irefsym);
2280 bfd_h_put_32 (abfd, module->nrefsym, &n.nrefsym);
2281 bfd_h_put_32 (abfd, module->ilocalsym, &n.ilocalsym);
2282 bfd_h_put_32 (abfd, module->nlocalsym, &n.nlocalsym);
2283 bfd_h_put_32 (abfd, module->iextrel, &n.iextrel);
2284 bfd_h_put_32 (abfd, module->nextrel, &n.nextrel);
2285 bfd_h_put_32 (abfd, iinit, &n.iinit_iterm);
2286 bfd_h_put_32 (abfd, ninit, &n.ninit_nterm);
2287 bfd_h_put_32 (abfd, module->objc_module_info_addr,
2288 &n.objc_module_info_addr);
2289 bfd_h_put_32 (abfd, module->objc_module_info_size,
2290 &n.objc_module_info_size);
2291
2292 if (bfd_bwrite ((void *) &n, sizeof (n), abfd) != sizeof (n))
2293 return FALSE;
2294 }
2295 }
2296 }
2297
2298 if (cmd->ntoc != 0)
2299 {
2300 unsigned int i;
2301
2302 if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0)
2303 return FALSE;
2304
2305 for (i = 0; i < cmd->ntoc; i++)
2306 {
2307 struct mach_o_dylib_table_of_contents_external raw;
2308 bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i];
2309
2310 bfd_h_put_32 (abfd, toc->symbol_index, &raw.symbol_index);
2311 bfd_h_put_32 (abfd, toc->module_index, &raw.module_index);
2312
2313 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
2314 return FALSE;
2315 }
2316 }
2317
2318 if (cmd->nindirectsyms > 0)
2319 {
2320 unsigned int i;
2321
2322 if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0)
2323 return FALSE;
2324
2325 for (i = 0; i < cmd->nindirectsyms; ++i)
2326 {
2327 unsigned char raw[4];
2328
2329 bfd_h_put_32 (abfd, cmd->indirect_syms[i], &raw);
2330 if (bfd_bwrite (raw, sizeof (raw), abfd) != sizeof (raw))
2331 return FALSE;
2332 }
2333 }
2334
2335 if (cmd->nextrefsyms != 0)
2336 {
2337 unsigned int i;
2338
2339 if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0)
2340 return FALSE;
2341
2342 for (i = 0; i < cmd->nextrefsyms; i++)
2343 {
2344 unsigned long v;
2345 unsigned char raw[4];
2346 bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i];
2347
2348 /* Fields isym and flags are written as bit-fields, thus we need
2349 a specific processing for endianness. */
2350
2351 if (bfd_big_endian (abfd))
2352 {
2353 v = ((ref->isym & 0xffffff) << 8);
2354 v |= ref->flags & 0xff;
2355 }
2356 else
2357 {
2358 v = ref->isym & 0xffffff;
2359 v |= ((ref->flags & 0xff) << 24);
2360 }
2361
2362 bfd_h_put_32 (abfd, v, raw);
2363 if (bfd_bwrite (raw, sizeof (raw), abfd) != sizeof (raw))
2364 return FALSE;
2365 }
2366 }
2367
2368 /* The command. */
2369 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0)
2370 return FALSE;
2371 else
2372 {
2373 struct mach_o_dysymtab_command_external raw;
2374
2375 bfd_h_put_32 (abfd, cmd->ilocalsym, &raw.ilocalsym);
2376 bfd_h_put_32 (abfd, cmd->nlocalsym, &raw.nlocalsym);
2377 bfd_h_put_32 (abfd, cmd->iextdefsym, &raw.iextdefsym);
2378 bfd_h_put_32 (abfd, cmd->nextdefsym, &raw.nextdefsym);
2379 bfd_h_put_32 (abfd, cmd->iundefsym, &raw.iundefsym);
2380 bfd_h_put_32 (abfd, cmd->nundefsym, &raw.nundefsym);
2381 bfd_h_put_32 (abfd, cmd->tocoff, &raw.tocoff);
2382 bfd_h_put_32 (abfd, cmd->ntoc, &raw.ntoc);
2383 bfd_h_put_32 (abfd, cmd->modtaboff, &raw.modtaboff);
2384 bfd_h_put_32 (abfd, cmd->nmodtab, &raw.nmodtab);
2385 bfd_h_put_32 (abfd, cmd->extrefsymoff, &raw.extrefsymoff);
2386 bfd_h_put_32 (abfd, cmd->nextrefsyms, &raw.nextrefsyms);
2387 bfd_h_put_32 (abfd, cmd->indirectsymoff, &raw.indirectsymoff);
2388 bfd_h_put_32 (abfd, cmd->nindirectsyms, &raw.nindirectsyms);
2389 bfd_h_put_32 (abfd, cmd->extreloff, &raw.extreloff);
2390 bfd_h_put_32 (abfd, cmd->nextrel, &raw.nextrel);
2391 bfd_h_put_32 (abfd, cmd->locreloff, &raw.locreloff);
2392 bfd_h_put_32 (abfd, cmd->nlocrel, &raw.nlocrel);
2393
2394 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
2395 return FALSE;
2396 }
2397
2398 return TRUE;
2399}
2400
2401static unsigned
2402bfd_mach_o_primary_symbol_sort_key (bfd_mach_o_asymbol *s)
2403{
2404 unsigned mtyp = s->n_type & BFD_MACH_O_N_TYPE;
2405
2406 /* Just leave debug symbols where they are (pretend they are local, and
2407 then they will just be sorted on position). */
2408 if (s->n_type & BFD_MACH_O_N_STAB)
2409 return 0;
2410
2411 /* Local (we should never see an undefined local AFAICT). */
2412 if (! (s->n_type & (BFD_MACH_O_N_EXT | BFD_MACH_O_N_PEXT)))
2413 return 0;
2414
2415 /* Common symbols look like undefined externs. */
2416 if (mtyp == BFD_MACH_O_N_UNDF)
2417 return 2;
2418
2419 /* A defined non-local, non-debug symbol. */
2420 return 1;
2421}
2422
2423static int
2424bfd_mach_o_cf_symbols (const void *a, const void *b)
2425{
2426 bfd_mach_o_asymbol *sa = *(bfd_mach_o_asymbol **) a;
2427 bfd_mach_o_asymbol *sb = *(bfd_mach_o_asymbol **) b;
2428 unsigned int soa, sob;
2429
2430 soa = bfd_mach_o_primary_symbol_sort_key (sa);
2431 sob = bfd_mach_o_primary_symbol_sort_key (sb);
2432 if (soa < sob)
2433 return -1;
2434
2435 if (soa > sob)
2436 return 1;
2437
2438 /* If it's local or stab, just preserve the input order. */
2439 if (soa == 0)
2440 {
2441 if (sa->symbol.udata.i < sb->symbol.udata.i)
2442 return -1;
2443 if (sa->symbol.udata.i > sb->symbol.udata.i)
2444 return 1;
2445
2446 /* This is probably an error. */
2447 return 0;
2448 }
2449
2450 /* The second sort key is name. */
2451 return strcmp (sa->symbol.name, sb->symbol.name);
2452}
2453
2454/* Process the symbols.
2455
2456 This should be OK for single-module files - but it is not likely to work
2457 for multi-module shared libraries.
2458
2459 (a) If the application has not filled in the relevant mach-o fields, make
2460 an estimate.
2461
2462 (b) Order them, like this:
2463 ( i) local.
2464 (unsorted)
2465 ( ii) external defined
2466 (by name)
2467 (iii) external undefined/common
2468 (by name)
2469 ( iv) common
2470 (by name)
2471*/
2472
2473static bfd_boolean
2474bfd_mach_o_mangle_symbols (bfd *abfd)
2475{
2476 unsigned long i;
2477 asymbol **symbols = bfd_get_outsymbols (abfd);
2478
2479 if (symbols == NULL || bfd_get_symcount (abfd) == 0)
2480 return TRUE;
2481
2482 for (i = 0; i < bfd_get_symcount (abfd); i++)
2483 {
2484 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2485
2486 /* We use this value, which is out-of-range as a symbol index, to signal
2487 that the mach-o-specific data are not filled in and need to be created
2488 from the bfd values. It is much preferable for the application to do
2489 this, since more meaningful diagnostics can be made that way. */
2490
2491 if (s->symbol.udata.i == SYM_MACHO_FIELDS_UNSET)
2492 {
2493 /* No symbol information has been set - therefore determine
2494 it from the bfd symbol flags/info. */
2495 if (s->symbol.section == bfd_abs_section_ptr)
2496 s->n_type = BFD_MACH_O_N_ABS;
2497 else if (s->symbol.section == bfd_und_section_ptr)
2498 {
2499 s->n_type = BFD_MACH_O_N_UNDF;
2500 if (s->symbol.flags & BSF_WEAK)
2501 s->n_desc |= BFD_MACH_O_N_WEAK_REF;
2502 /* mach-o automatically makes undefined symbols extern. */
2503 s->n_type |= BFD_MACH_O_N_EXT;
2504 s->symbol.flags |= BSF_GLOBAL;
2505 }
2506 else if (s->symbol.section == bfd_com_section_ptr)
2507 {
2508 s->n_type = BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT;
2509 s->symbol.flags |= BSF_GLOBAL;
2510 }
2511 else
2512 s->n_type = BFD_MACH_O_N_SECT;
2513 }
2514
2515 /* Update external symbol bit in case objcopy changed it. */
2516 if (s->symbol.flags & BSF_GLOBAL)
2517 s->n_type |= BFD_MACH_O_N_EXT;
2518 else
2519 s->n_type &= ~BFD_MACH_O_N_EXT;
2520
2521 /* Put the section index in, where required. */
2522 if ((s->symbol.section != bfd_abs_section_ptr
2523 && s->symbol.section != bfd_und_section_ptr
2524 && s->symbol.section != bfd_com_section_ptr)
2525 || ((s->n_type & BFD_MACH_O_N_STAB) != 0
2526 && s->symbol.name == NULL))
2527 s->n_sect = s->symbol.section->output_section->target_index;
2528
2529 /* Number to preserve order for local and debug syms. */
2530 s->symbol.udata.i = i;
2531 }
2532
2533 /* Sort the symbols. */
2534 qsort ((void *) symbols, (size_t) bfd_get_symcount (abfd),
2535 sizeof (asymbol *), bfd_mach_o_cf_symbols);
2536
2537 for (i = 0; i < bfd_get_symcount (abfd); ++i)
2538 {
2539 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2540 s->symbol.udata.i = i; /* renumber. */
2541 }
2542
2543 return TRUE;
2544}
2545
2546/* We build a flat table of sections, which can be re-ordered if necessary.
2547 Fill in the section number and other mach-o-specific data. */
2548
2549static bfd_boolean
2550bfd_mach_o_mangle_sections (bfd *abfd, bfd_mach_o_data_struct *mdata)
2551{
2552 asection *sec;
2553 unsigned target_index;
2554 unsigned nsect;
2555 size_t amt;
2556
2557 nsect = bfd_count_sections (abfd);
2558
2559 /* Don't do it if it's already set - assume the application knows what it's
2560 doing. */
2561 if (mdata->nsects == nsect
2562 && (mdata->nsects == 0 || mdata->sections != NULL))
2563 return TRUE;
2564
2565 /* We need to check that this can be done... */
2566 if (nsect > 255)
2567 {
2568 _bfd_error_handler (_("mach-o: there are too many sections (%u)"
2569 " maximum is 255,\n"), nsect);
2570 return FALSE;
2571 }
2572
2573 mdata->nsects = nsect;
2574 if (_bfd_mul_overflow (mdata->nsects, sizeof (bfd_mach_o_section *), &amt))
2575 {
2576 bfd_set_error (bfd_error_no_memory);
2577 return FALSE;
2578 }
2579 mdata->sections = bfd_alloc (abfd, amt);
2580 if (mdata->sections == NULL)
2581 return FALSE;
2582
2583 /* Create Mach-O sections.
2584 Section type, attribute and align should have been set when the
2585 section was created - either read in or specified. */
2586 target_index = 0;
2587 for (sec = abfd->sections; sec; sec = sec->next)
2588 {
2589 unsigned bfd_align = bfd_section_alignment (sec);
2590 bfd_mach_o_section *msect = bfd_mach_o_get_mach_o_section (sec);
2591
2592 mdata->sections[target_index] = msect;
2593
2594 msect->addr = bfd_section_vma (sec);
2595 msect->size = bfd_section_size (sec);
2596
2597 /* Use the largest alignment set, in case it was bumped after the
2598 section was created. */
2599 msect->align = msect->align > bfd_align ? msect->align : bfd_align;
2600
2601 msect->offset = 0;
2602 sec->target_index = ++target_index;
2603 }
2604
2605 return TRUE;
2606}
2607
2608bfd_boolean
2609bfd_mach_o_write_contents (bfd *abfd)
2610{
2611 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2612 bfd_mach_o_load_command *cmd;
2613 bfd_mach_o_symtab_command *symtab = NULL;
2614 bfd_mach_o_dysymtab_command *dysymtab = NULL;
2615 bfd_mach_o_segment_command *linkedit = NULL;
2616
2617 /* Make the commands, if not already present. */
2618 if (!abfd->output_has_begun && !bfd_mach_o_build_commands (abfd))
2619 return FALSE;
2620 abfd->output_has_begun = TRUE;
2621
2622 /* Write the header. */
2623 if (!bfd_mach_o_write_header (abfd, &mdata->header))
2624 return FALSE;
2625
2626 /* First pass: allocate the linkedit segment. */
2627 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
2628 switch (cmd->type)
2629 {
2630 case BFD_MACH_O_LC_SEGMENT_64:
2631 case BFD_MACH_O_LC_SEGMENT:
2632 if (strcmp (cmd->command.segment.segname, "__LINKEDIT") == 0)
2633 linkedit = &cmd->command.segment;
2634 break;
2635 case BFD_MACH_O_LC_SYMTAB:
2636 symtab = &cmd->command.symtab;
2637 break;
2638 case BFD_MACH_O_LC_DYSYMTAB:
2639 dysymtab = &cmd->command.dysymtab;
2640 break;
2641 case BFD_MACH_O_LC_DYLD_INFO:
2642 {
2643 bfd_mach_o_dyld_info_command *di = &cmd->command.dyld_info;
2644
2645 if (di->rebase_size != 0)
2646 {
2647 di->rebase_off = mdata->filelen;
2648 mdata->filelen += di->rebase_size;
2649 }
2650 if (di->bind_size != 0)
2651 {
2652 di->bind_off = mdata->filelen;
2653 mdata->filelen += di->bind_size;
2654 }
2655 if (di->weak_bind_size != 0)
2656 {
2657 di->weak_bind_off = mdata->filelen;
2658 mdata->filelen += di->weak_bind_size;
2659 }
2660 if (di->lazy_bind_size != 0)
2661 {
2662 di->lazy_bind_off = mdata->filelen;
2663 mdata->filelen += di->lazy_bind_size;
2664 }
2665 if (di->export_size != 0)
2666 {
2667 di->export_off = mdata->filelen;
2668 mdata->filelen += di->export_size;
2669 }
2670 }
2671 break;
2672 case BFD_MACH_O_LC_LOAD_DYLIB:
2673 case BFD_MACH_O_LC_LOAD_DYLINKER:
2674 case BFD_MACH_O_LC_MAIN:
2675 /* Nothing to do. */
2676 break;
2677 default:
2678 _bfd_error_handler
2679 (_("unable to allocate data for load command %#x"),
2680 cmd->type);
2681 break;
2682 }
2683
2684 /* Specially handle symtab and dysymtab. */
2685
2686 /* Pre-allocate the symbol table (but not the string table). The reason
2687 is that the dysymtab is after the symbol table but before the string
2688 table (required by the native strip tool). */
2689 if (symtab != NULL)
2690 {
2691 unsigned int symlen;
2692 unsigned int wide = bfd_mach_o_wide_p (abfd);
2693
2694 symlen = wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE;
2695
2696 /* Align for symbols. */
2697 mdata->filelen = FILE_ALIGN (mdata->filelen, wide ? 3 : 2);
2698 symtab->symoff = mdata->filelen;
2699
2700 symtab->nsyms = bfd_get_symcount (abfd);
2701 mdata->filelen += symtab->nsyms * symlen;
2702 }
2703
2704 /* Build the dysymtab. */
2705 if (dysymtab != NULL)
2706 if (!bfd_mach_o_build_dysymtab (abfd, dysymtab))
2707 return FALSE;
2708
2709 /* Write symtab and strtab. */
2710 if (symtab != NULL)
2711 if (!bfd_mach_o_write_symtab_content (abfd, symtab))
2712 return FALSE;
2713
2714 /* Adjust linkedit size. */
2715 if (linkedit != NULL)
2716 {
2717 /* bfd_vma pagemask = bfd_mach_o_get_backend_data (abfd)->page_size - 1; */
2718
2719 linkedit->vmsize = mdata->filelen - linkedit->fileoff;
2720 /* linkedit->vmsize = (linkedit->vmsize + pagemask) & ~pagemask; */
2721 linkedit->filesize = mdata->filelen - linkedit->fileoff;
2722
2723 linkedit->initprot = BFD_MACH_O_PROT_READ;
2724 linkedit->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
2725 | BFD_MACH_O_PROT_EXECUTE;
2726 }
2727
2728 /* Second pass: write commands. */
2729 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
2730 {
2731 struct mach_o_load_command_external raw;
2732 unsigned long typeflag;
2733
2734 typeflag = cmd->type | (cmd->type_required ? BFD_MACH_O_LC_REQ_DYLD : 0);
2735
2736 bfd_h_put_32 (abfd, typeflag, raw.cmd);
2737 bfd_h_put_32 (abfd, cmd->len, raw.cmdsize);
2738
2739 if (bfd_seek (abfd, cmd->offset, SEEK_SET) != 0
2740 || bfd_bwrite (&raw, BFD_MACH_O_LC_SIZE, abfd) != 8)
2741 return FALSE;
2742
2743 switch (cmd->type)
2744 {
2745 case BFD_MACH_O_LC_SEGMENT:
2746 if (!bfd_mach_o_write_segment_32 (abfd, cmd))
2747 return FALSE;
2748 break;
2749 case BFD_MACH_O_LC_SEGMENT_64:
2750 if (!bfd_mach_o_write_segment_64 (abfd, cmd))
2751 return FALSE;
2752 break;
2753 case BFD_MACH_O_LC_SYMTAB:
2754 if (!bfd_mach_o_write_symtab (abfd, cmd))
2755 return FALSE;
2756 break;
2757 case BFD_MACH_O_LC_DYSYMTAB:
2758 if (!bfd_mach_o_write_dysymtab (abfd, cmd))
2759 return FALSE;
2760 break;
2761 case BFD_MACH_O_LC_THREAD:
2762 case BFD_MACH_O_LC_UNIXTHREAD:
2763 if (!bfd_mach_o_write_thread (abfd, cmd))
2764 return FALSE;
2765 break;
2766 case BFD_MACH_O_LC_LOAD_DYLIB:
2767 if (!bfd_mach_o_write_dylib (abfd, cmd))
2768 return FALSE;
2769 break;
2770 case BFD_MACH_O_LC_LOAD_DYLINKER:
2771 if (!bfd_mach_o_write_dylinker (abfd, cmd))
2772 return FALSE;
2773 break;
2774 case BFD_MACH_O_LC_MAIN:
2775 if (!bfd_mach_o_write_main (abfd, cmd))
2776 return FALSE;
2777 break;
2778 case BFD_MACH_O_LC_DYLD_INFO:
2779 if (!bfd_mach_o_write_dyld_info (abfd, cmd))
2780 return FALSE;
2781 break;
2782 default:
2783 _bfd_error_handler
2784 (_("unable to write unknown load command %#x"),
2785 cmd->type);
2786 return FALSE;
2787 }
2788 }
2789
2790 return TRUE;
2791}
2792
2793static void
2794bfd_mach_o_append_section_to_segment (bfd_mach_o_segment_command *seg,
2795 bfd_mach_o_section *s)
2796{
2797 if (seg->sect_head == NULL)
2798 seg->sect_head = s;
2799 else
2800 seg->sect_tail->next = s;
2801 seg->sect_tail = s;
2802}
2803
2804/* Create section Mach-O flags from BFD flags. */
2805
2806static void
2807bfd_mach_o_set_section_flags_from_bfd (bfd *abfd ATTRIBUTE_UNUSED,
2808 asection *sec)
2809{
2810 flagword bfd_flags;
2811 bfd_mach_o_section *s = bfd_mach_o_get_mach_o_section (sec);
2812
2813 /* Create default flags. */
2814 bfd_flags = bfd_section_flags (sec);
2815 if ((bfd_flags & SEC_CODE) == SEC_CODE)
2816 s->flags = BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS
2817 | BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS
2818 | BFD_MACH_O_S_REGULAR;
2819 else if ((bfd_flags & (SEC_ALLOC | SEC_LOAD)) == SEC_ALLOC)
2820 s->flags = BFD_MACH_O_S_ZEROFILL;
2821 else if (bfd_flags & SEC_DEBUGGING)
2822 s->flags = BFD_MACH_O_S_REGULAR | BFD_MACH_O_S_ATTR_DEBUG;
2823 else
2824 s->flags = BFD_MACH_O_S_REGULAR;
2825}
2826
2827static bfd_boolean
2828bfd_mach_o_build_obj_seg_command (bfd *abfd, bfd_mach_o_segment_command *seg)
2829{
2830 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2831 unsigned int i, j;
2832
2833 seg->vmaddr = 0;
2834 seg->fileoff = mdata->filelen;
2835 seg->initprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
2836 | BFD_MACH_O_PROT_EXECUTE;
2837 seg->maxprot = seg->initprot;
2838
2839 /* Append sections to the segment.
2840
2841 This is a little tedious, we have to honor the need to account zerofill
2842 sections after all the rest. This forces us to do the calculation of
2843 total vmsize in three passes so that any alignment increments are
2844 properly accounted. */
2845 for (i = 0; i < mdata->nsects; ++i)
2846 {
2847 bfd_mach_o_section *s = mdata->sections[i];
2848 asection *sec = s->bfdsection;
2849
2850 /* Although we account for zerofill section sizes in vm order, they are
2851 placed in the file in source sequence. */
2852 bfd_mach_o_append_section_to_segment (seg, s);
2853 s->offset = 0;
2854
2855 /* Zerofill sections have zero file size & offset, the only content
2856 written to the file is the symbols. */
2857 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) == BFD_MACH_O_S_ZEROFILL
2858 || ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2859 == BFD_MACH_O_S_GB_ZEROFILL))
2860 continue;
2861
2862 /* The Darwin system tools (in MH_OBJECT files, at least) always account
2863 sections, even those with zero size. */
2864 if (s->size > 0)
2865 {
2866 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2867 seg->vmsize += s->size;
2868
2869 /* MH_OBJECT files have unaligned content. */
2870 if (1)
2871 {
2872 seg->filesize = FILE_ALIGN (seg->filesize, s->align);
2873 mdata->filelen = FILE_ALIGN (mdata->filelen, s->align);
2874 }
2875 seg->filesize += s->size;
2876
2877 /* The system tools write even zero-sized sections with an offset
2878 field set to the current file position. */
2879 s->offset = mdata->filelen;
2880 }
2881
2882 sec->filepos = s->offset;
2883 mdata->filelen += s->size;
2884 }
2885
2886 /* Now pass through again, for zerofill, only now we just update the
2887 vmsize, and then for zerofill_GB. */
2888 for (j = 0; j < 2; j++)
2889 {
2890 unsigned int stype;
2891
2892 if (j == 0)
2893 stype = BFD_MACH_O_S_ZEROFILL;
2894 else
2895 stype = BFD_MACH_O_S_GB_ZEROFILL;
2896
2897 for (i = 0; i < mdata->nsects; ++i)
2898 {
2899 bfd_mach_o_section *s = mdata->sections[i];
2900
2901 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != stype)
2902 continue;
2903
2904 if (s->size > 0)
2905 {
2906 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2907 seg->vmsize += s->size;
2908 }
2909 }
2910 }
2911
2912 /* Allocate space for the relocations. */
2913 mdata->filelen = FILE_ALIGN (mdata->filelen, 2);
2914
2915 for (i = 0; i < mdata->nsects; ++i)
2916 {
2917 bfd_mach_o_section *ms = mdata->sections[i];
2918 asection *sec = ms->bfdsection;
2919
2920 ms->nreloc = sec->reloc_count;
2921 if (ms->nreloc == 0)
2922 {
2923 /* Clear nreloc and reloff if there is no relocs. */
2924 ms->reloff = 0;
2925 continue;
2926 }
2927 sec->rel_filepos = mdata->filelen;
2928 ms->reloff = sec->rel_filepos;
2929 mdata->filelen += sec->reloc_count * BFD_MACH_O_RELENT_SIZE;
2930 }
2931
2932 return TRUE;
2933}
2934
2935static bfd_boolean
2936bfd_mach_o_build_exec_seg_command (bfd *abfd, bfd_mach_o_segment_command *seg)
2937{
2938 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2939 unsigned int i;
2940 bfd_vma pagemask = bfd_mach_o_get_backend_data (abfd)->page_size - 1;
2941 bfd_vma vma;
2942 bfd_mach_o_section *s;
2943
2944 seg->vmsize = 0;
2945
2946 seg->fileoff = mdata->filelen;
2947 seg->maxprot = 0;
2948 seg->initprot = 0;
2949 seg->flags = 0;
2950
2951 /* Append sections to the segment. We assume they are properly ordered
2952 by vma (but we check that). */
2953 vma = 0;
2954 for (i = 0; i < mdata->nsects; ++i)
2955 {
2956 s = mdata->sections[i];
2957
2958 /* Consider only sections for this segment. */
2959 if (strcmp (seg->segname, s->segname) != 0)
2960 continue;
2961
2962 bfd_mach_o_append_section_to_segment (seg, s);
2963
2964 if (s->addr < vma)
2965 {
2966 _bfd_error_handler
2967 /* xgettext:c-format */
2968 (_("section address (%#" PRIx64 ") "
2969 "below start of segment (%#" PRIx64 ")"),
2970 (uint64_t) s->addr, (uint64_t) vma);
2971 return FALSE;
2972 }
2973
2974 vma = s->addr + s->size;
2975 }
2976
2977 /* Set segment file offset: make it page aligned. */
2978 vma = seg->sect_head->addr;
2979 seg->vmaddr = vma & ~pagemask;
2980 if ((mdata->filelen & pagemask) > (vma & pagemask))
2981 mdata->filelen += pagemask + 1;
2982 seg->fileoff = mdata->filelen & ~pagemask;
2983 mdata->filelen = seg->fileoff + (vma & pagemask);
2984
2985 /* Set section file offset. */
2986 for (s = seg->sect_head; s != NULL; s = s->next)
2987 {
2988 asection *sec = s->bfdsection;
2989 flagword flags = bfd_section_flags (sec);
2990
2991 /* Adjust segment size. */
2992 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2993 seg->vmsize += s->size;
2994
2995 /* File offset and length. */
2996 seg->filesize = FILE_ALIGN (seg->filesize, s->align);
2997
2998 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != BFD_MACH_O_S_ZEROFILL
2999 && ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK)
3000 != BFD_MACH_O_S_GB_ZEROFILL))
3001 {
3002 mdata->filelen = FILE_ALIGN (mdata->filelen, s->align);
3003
3004 s->offset = mdata->filelen;
3005 s->bfdsection->filepos = s->offset;
3006
3007 seg->filesize += s->size;
3008 mdata->filelen += s->size;
3009 }
3010 else
3011 {
3012 s->offset = 0;
3013 s->bfdsection->filepos = 0;
3014 }
3015
3016 /* Set protection. */
3017 if (flags & SEC_LOAD)
3018 {
3019 if (flags & SEC_CODE)
3020 seg->initprot |= BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_EXECUTE;
3021 if ((flags & (SEC_DATA | SEC_READONLY)) == SEC_DATA)
3022 seg->initprot |= BFD_MACH_O_PROT_WRITE | BFD_MACH_O_PROT_READ;
3023 }
3024
3025 /* Relocs shouldn't appear in non-object files. */
3026 if (s->bfdsection->reloc_count != 0)
3027 return FALSE;
3028 }
3029
3030 /* Set maxprot. */
3031 if (seg->initprot != 0)
3032 seg->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
3033 | BFD_MACH_O_PROT_EXECUTE;
3034 else
3035 seg->maxprot = 0;
3036
3037 /* Round segment size (and file size). */
3038 seg->vmsize = (seg->vmsize + pagemask) & ~pagemask;
3039 seg->filesize = (seg->filesize + pagemask) & ~pagemask;
3040 mdata->filelen = (mdata->filelen + pagemask) & ~pagemask;
3041
3042 return TRUE;
3043}
3044
3045/* Layout the commands: set commands size and offset, set ncmds and sizeofcmds
3046 fields in header. */
3047
3048static bfd_boolean
3049bfd_mach_o_layout_commands (bfd_mach_o_data_struct *mdata)
3050{
3051 unsigned wide = mach_o_wide_p (&mdata->header);
3052 unsigned int hdrlen;
3053 ufile_ptr offset;
3054 bfd_mach_o_load_command *cmd;
3055 unsigned int align;
3056 bfd_boolean ret = TRUE;
3057
3058 hdrlen = wide ? BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
3059 align = wide ? 8 - 1 : 4 - 1;
3060 offset = hdrlen;
3061 mdata->header.ncmds = 0;
3062
3063 for (cmd = mdata->first_command; cmd; cmd = cmd->next)
3064 {
3065 mdata->header.ncmds++;
3066 cmd->offset = offset;
3067
3068 switch (cmd->type)
3069 {
3070 case BFD_MACH_O_LC_SEGMENT_64:
3071 cmd->len = BFD_MACH_O_LC_SEGMENT_64_SIZE
3072 + BFD_MACH_O_SECTION_64_SIZE * cmd->command.segment.nsects;
3073 break;
3074 case BFD_MACH_O_LC_SEGMENT:
3075 cmd->len = BFD_MACH_O_LC_SEGMENT_SIZE
3076 + BFD_MACH_O_SECTION_SIZE * cmd->command.segment.nsects;
3077 break;
3078 case BFD_MACH_O_LC_SYMTAB:
3079 cmd->len = sizeof (struct mach_o_symtab_command_external)
3080 + BFD_MACH_O_LC_SIZE;
3081 break;
3082 case BFD_MACH_O_LC_DYSYMTAB:
3083 cmd->len = sizeof (struct mach_o_dysymtab_command_external)
3084 + BFD_MACH_O_LC_SIZE;
3085 break;
3086 case BFD_MACH_O_LC_LOAD_DYLIB:
3087 cmd->len = sizeof (struct mach_o_dylib_command_external)
3088 + BFD_MACH_O_LC_SIZE;
3089 cmd->command.dylib.name_offset = cmd->len;
3090 cmd->len += strlen (cmd->command.dylib.name_str);
3091 cmd->len = (cmd->len + align) & ~align;
3092 break;
3093 case BFD_MACH_O_LC_LOAD_DYLINKER:
3094 cmd->len = sizeof (struct mach_o_str_command_external)
3095 + BFD_MACH_O_LC_SIZE;
3096 cmd->command.dylinker.name_offset = cmd->len;
3097 cmd->len += strlen (cmd->command.dylinker.name_str);
3098 cmd->len = (cmd->len + align) & ~align;
3099 break;
3100 case BFD_MACH_O_LC_MAIN:
3101 cmd->len = sizeof (struct mach_o_entry_point_command_external)
3102 + BFD_MACH_O_LC_SIZE;
3103 break;
3104 case BFD_MACH_O_LC_DYLD_INFO:
3105 cmd->len = sizeof (struct mach_o_dyld_info_command_external)
3106 + BFD_MACH_O_LC_SIZE;
3107 break;
3108 default:
3109 _bfd_error_handler
3110 (_("unable to layout unknown load command %#x"),
3111 cmd->type);
3112 ret = FALSE;
3113 break;
3114 }
3115
3116 BFD_ASSERT (cmd->len % (align + 1) == 0);
3117 offset += cmd->len;
3118 }
3119 mdata->header.sizeofcmds = offset - hdrlen;
3120 mdata->filelen = offset;
3121
3122 return ret;
3123}
3124
3125/* Subroutine of bfd_mach_o_build_commands: set type, name and nsects of a
3126 segment. */
3127
3128static void
3129bfd_mach_o_init_segment (bfd_mach_o_data_struct *mdata,
3130 bfd_mach_o_load_command *cmd,
3131 const char *segname, unsigned int nbr_sect)
3132{
3133 bfd_mach_o_segment_command *seg = &cmd->command.segment;
3134 unsigned wide = mach_o_wide_p (&mdata->header);
3135
3136 /* Init segment command. */
3137 cmd->type = wide ? BFD_MACH_O_LC_SEGMENT_64 : BFD_MACH_O_LC_SEGMENT;
3138 cmd->type_required = FALSE;
3139
3140 strcpy (seg->segname, segname);
3141 seg->nsects = nbr_sect;
3142
3143 seg->vmaddr = 0;
3144 seg->vmsize = 0;
3145
3146 seg->fileoff = 0;
3147 seg->filesize = 0;
3148 seg->maxprot = 0;
3149 seg->initprot = 0;
3150 seg->flags = 0;
3151 seg->sect_head = NULL;
3152 seg->sect_tail = NULL;
3153}
3154
3155/* Build Mach-O load commands (currently assuming an MH_OBJECT file).
3156 TODO: Other file formats, rebuilding symtab/dysymtab commands for strip
3157 and copy functionality. */
3158
3159bfd_boolean
3160bfd_mach_o_build_commands (bfd *abfd)
3161{
3162 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3163 unsigned wide = mach_o_wide_p (&mdata->header);
3164 unsigned int nbr_segcmd = 0;
3165 bfd_mach_o_load_command *commands;
3166 unsigned int nbr_commands;
3167 int symtab_idx = -1;
3168 int dysymtab_idx = -1;
3169 int main_idx = -1;
3170 unsigned int i;
3171
3172 /* Return now if already built. */
3173 if (mdata->header.ncmds != 0)
3174 return TRUE;
3175
3176 /* Fill in the file type, if not already set. */
3177 if (mdata->header.filetype == 0)
3178 {
3179 if (abfd->flags & EXEC_P)
3180 mdata->header.filetype = BFD_MACH_O_MH_EXECUTE;
3181 else if (abfd->flags & DYNAMIC)
3182 mdata->header.filetype = BFD_MACH_O_MH_DYLIB;
3183 else
3184 mdata->header.filetype = BFD_MACH_O_MH_OBJECT;
3185 }
3186
3187 /* If hasn't already been done, flatten sections list, and sort
3188 if/when required. Must be done before the symbol table is adjusted,
3189 since that depends on properly numbered sections. */
3190 if (mdata->nsects == 0 || mdata->sections == NULL)
3191 if (! bfd_mach_o_mangle_sections (abfd, mdata))
3192 return FALSE;
3193
3194 /* Order the symbol table, fill-in/check mach-o specific fields and
3195 partition out any indirect symbols. */
3196 if (!bfd_mach_o_mangle_symbols (abfd))
3197 return FALSE;
3198
3199 /* Segment commands. */
3200 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT)
3201 {
3202 /* Only one segment for all the sections. But the segment is
3203 optional if there is no sections. */
3204 nbr_segcmd = (mdata->nsects > 0) ? 1 : 0;
3205 }
3206 else
3207 {
3208 bfd_mach_o_section *prev_sect = NULL;
3209
3210 /* One pagezero segment and one linkedit segment. */
3211 nbr_segcmd = 2;
3212
3213 /* Create one segment for associated segment name in sections.
3214 Assume that sections with the same segment name are consecutive. */
3215 for (i = 0; i < mdata->nsects; i++)
3216 {
3217 bfd_mach_o_section *this_sect = mdata->sections[i];
3218
3219 if (prev_sect == NULL
3220 || strcmp (prev_sect->segname, this_sect->segname) != 0)
3221 {
3222 nbr_segcmd++;
3223 prev_sect = this_sect;
3224 }
3225 }
3226 }
3227
3228 nbr_commands = nbr_segcmd;
3229
3230 /* One command for the symbol table (only if there are symbols. */
3231 if (bfd_get_symcount (abfd) > 0)
3232 symtab_idx = nbr_commands++;
3233
3234 /* FIXME:
3235 This is a rather crude test for whether we should build a dysymtab. */
3236 if (bfd_mach_o_should_emit_dysymtab ()
3237 && bfd_get_symcount (abfd))
3238 {
3239 /* If there should be a case where a dysymtab could be emitted without
3240 a symtab (seems improbable), this would need amending. */
3241 dysymtab_idx = nbr_commands++;
3242 }
3243
3244 /* Add an entry point command. */
3245 if (mdata->header.filetype == BFD_MACH_O_MH_EXECUTE
3246 && bfd_get_start_address (abfd) != 0)
3247 main_idx = nbr_commands++;
3248
3249 /* Well, we must have a header, at least. */
3250 mdata->filelen = wide ? BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
3251
3252 /* A bit unusual, but no content is valid;
3253 as -n empty.s -o empty.o */
3254 if (nbr_commands == 0)
3255 {
3256 /* Layout commands (well none...) and set headers command fields. */
3257 return bfd_mach_o_layout_commands (mdata);
3258 }
3259
3260 /* Create commands for segments (and symtabs), prepend them. */
3261 commands = bfd_zalloc (abfd, nbr_commands * sizeof (bfd_mach_o_load_command));
3262 if (commands == NULL)
3263 return FALSE;
3264 for (i = 0; i < nbr_commands - 1; i++)
3265 commands[i].next = &commands[i + 1];
3266 commands[nbr_commands - 1].next = mdata->first_command;
3267 if (mdata->first_command == NULL)
3268 mdata->last_command = &commands[nbr_commands - 1];
3269 mdata->first_command = &commands[0];
3270
3271 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT && nbr_segcmd != 0)
3272 {
3273 /* For object file, there is only one segment. */
3274 bfd_mach_o_init_segment (mdata, &commands[0], "", mdata->nsects);
3275 }
3276 else if (nbr_segcmd != 0)
3277 {
3278 bfd_mach_o_load_command *cmd;
3279
3280 BFD_ASSERT (nbr_segcmd >= 2);
3281
3282 /* The pagezero. */
3283 cmd = &commands[0];
3284 bfd_mach_o_init_segment (mdata, cmd, "__PAGEZERO", 0);
3285
3286 /* Segments from sections. */
3287 cmd++;
3288 for (i = 0; i < mdata->nsects;)
3289 {
3290 const char *segname = mdata->sections[i]->segname;
3291 unsigned int nbr_sect = 1;
3292
3293 /* Count number of sections for this segment. */
3294 for (i++; i < mdata->nsects; i++)
3295 if (strcmp (mdata->sections[i]->segname, segname) == 0)
3296 nbr_sect++;
3297 else
3298 break;
3299
3300 bfd_mach_o_init_segment (mdata, cmd, segname, nbr_sect);
3301 cmd++;
3302 }
3303
3304 /* The linkedit. */
3305 bfd_mach_o_init_segment (mdata, cmd, "__LINKEDIT", 0);
3306 }
3307
3308 if (symtab_idx >= 0)
3309 {
3310 /* Init symtab command. */
3311 bfd_mach_o_load_command *cmd = &commands[symtab_idx];
3312
3313 cmd->type = BFD_MACH_O_LC_SYMTAB;
3314 cmd->type_required = FALSE;
3315 }
3316
3317 /* If required, setup symtab command, see comment above about the quality
3318 of this test. */
3319 if (dysymtab_idx >= 0)
3320 {
3321 bfd_mach_o_load_command *cmd = &commands[dysymtab_idx];
3322
3323 cmd->type = BFD_MACH_O_LC_DYSYMTAB;
3324 cmd->type_required = FALSE;
3325 }
3326
3327 /* Create the main command. */
3328 if (main_idx >= 0)
3329 {
3330 bfd_mach_o_load_command *cmd = &commands[main_idx];
3331
3332 cmd->type = BFD_MACH_O_LC_MAIN;
3333 cmd->type_required = TRUE;
3334
3335 cmd->command.main.entryoff = 0;
3336 cmd->command.main.stacksize = 0;
3337 }
3338
3339 /* Layout commands. */
3340 if (! bfd_mach_o_layout_commands (mdata))
3341 return FALSE;
3342
3343 /* So, now we have sized the commands and the filelen set to that.
3344 Now we can build the segment command and set the section file offsets. */
3345 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT)
3346 {
3347 for (i = 0; i < nbr_segcmd; i++)
3348 if (!bfd_mach_o_build_obj_seg_command
3349 (abfd, &commands[i].command.segment))
3350 return FALSE;
3351 }
3352 else
3353 {
3354 bfd_vma maxvma = 0;
3355
3356 /* Skip pagezero and linkedit segments. */
3357 for (i = 1; i < nbr_segcmd - 1; i++)
3358 {
3359 bfd_mach_o_segment_command *seg = &commands[i].command.segment;
3360
3361 if (!bfd_mach_o_build_exec_seg_command (abfd, seg))
3362 return FALSE;
3363
3364 if (seg->vmaddr + seg->vmsize > maxvma)
3365 maxvma = seg->vmaddr + seg->vmsize;
3366 }
3367
3368 /* Set the size of __PAGEZERO. */
3369 commands[0].command.segment.vmsize =
3370 commands[1].command.segment.vmaddr;
3371
3372 /* Set the vma and fileoff of __LINKEDIT. */
3373 commands[nbr_segcmd - 1].command.segment.vmaddr = maxvma;
3374 commands[nbr_segcmd - 1].command.segment.fileoff = mdata->filelen;
3375
3376 /* Set entry point (once segments have been laid out). */
3377 if (main_idx >= 0)
3378 commands[main_idx].command.main.entryoff =
3379 bfd_get_start_address (abfd) - commands[1].command.segment.vmaddr;
3380 }
3381
3382 return TRUE;
3383}
3384
3385/* Set the contents of a section. */
3386
3387bfd_boolean
3388bfd_mach_o_set_section_contents (bfd *abfd,
3389 asection *section,
3390 const void * location,
3391 file_ptr offset,
3392 bfd_size_type count)
3393{
3394 file_ptr pos;
3395
3396 /* Trying to write the first section contents will trigger the creation of
3397 the load commands if they are not already present. */
3398 if (!abfd->output_has_begun && !bfd_mach_o_build_commands (abfd))
3399 return FALSE;
3400
3401 if (count == 0)
3402 return TRUE;
3403
3404 pos = section->filepos + offset;
3405 if (bfd_seek (abfd, pos, SEEK_SET) != 0
3406 || bfd_bwrite (location, count, abfd) != count)
3407 return FALSE;
3408
3409 return TRUE;
3410}
3411
3412int
3413bfd_mach_o_sizeof_headers (bfd *a ATTRIBUTE_UNUSED,
3414 struct bfd_link_info *info ATTRIBUTE_UNUSED)
3415{
3416 return 0;
3417}
3418
3419/* Make an empty symbol. This is required only because
3420 bfd_make_section_anyway wants to create a symbol for the section. */
3421
3422asymbol *
3423bfd_mach_o_make_empty_symbol (bfd *abfd)
3424{
3425 asymbol *new_symbol;
3426
3427 new_symbol = bfd_zalloc (abfd, sizeof (bfd_mach_o_asymbol));
3428 if (new_symbol == NULL)
3429 return new_symbol;
3430 new_symbol->the_bfd = abfd;
3431 new_symbol->udata.i = SYM_MACHO_FIELDS_UNSET;
3432 return new_symbol;
3433}
3434
3435static bfd_boolean
3436bfd_mach_o_read_header (bfd *abfd, file_ptr hdr_off, bfd_mach_o_header *header)
3437{
3438 struct mach_o_header_external raw;
3439 unsigned int size;
3440 bfd_vma (*get32) (const void *) = NULL;
3441
3442 /* Just read the magic number. */
3443 if (bfd_seek (abfd, hdr_off, SEEK_SET) != 0
3444 || bfd_bread (raw.magic, sizeof (raw.magic), abfd) != 4)
3445 return FALSE;
3446
3447 if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC)
3448 {
3449 header->byteorder = BFD_ENDIAN_BIG;
3450 header->magic = BFD_MACH_O_MH_MAGIC;
3451 header->version = 1;
3452 get32 = bfd_getb32;
3453 }
3454 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC)
3455 {
3456 header->byteorder = BFD_ENDIAN_LITTLE;
3457 header->magic = BFD_MACH_O_MH_MAGIC;
3458 header->version = 1;
3459 get32 = bfd_getl32;
3460 }
3461 else if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64)
3462 {
3463 header->byteorder = BFD_ENDIAN_BIG;
3464 header->magic = BFD_MACH_O_MH_MAGIC_64;
3465 header->version = 2;
3466 get32 = bfd_getb32;
3467 }
3468 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64)
3469 {
3470 header->byteorder = BFD_ENDIAN_LITTLE;
3471 header->magic = BFD_MACH_O_MH_MAGIC_64;
3472 header->version = 2;
3473 get32 = bfd_getl32;
3474 }
3475 else
3476 {
3477 header->byteorder = BFD_ENDIAN_UNKNOWN;
3478 return FALSE;
3479 }
3480
3481 /* Once the size of the header is known, read the full header. */
3482 size = mach_o_wide_p (header) ?
3483 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
3484
3485 if (bfd_seek (abfd, hdr_off, SEEK_SET) != 0
3486 || bfd_bread (&raw, size, abfd) != size)
3487 return FALSE;
3488
3489 header->cputype = (*get32) (raw.cputype);
3490 header->cpusubtype = (*get32) (raw.cpusubtype);
3491 header->filetype = (*get32) (raw.filetype);
3492 header->ncmds = (*get32) (raw.ncmds);
3493 header->sizeofcmds = (*get32) (raw.sizeofcmds);
3494 header->flags = (*get32) (raw.flags);
3495
3496 if (mach_o_wide_p (header))
3497 header->reserved = (*get32) (raw.reserved);
3498 else
3499 header->reserved = 0;
3500
3501 return TRUE;
3502}
3503
3504bfd_boolean
3505bfd_mach_o_new_section_hook (bfd *abfd, asection *sec)
3506{
3507 bfd_mach_o_section *s;
3508 unsigned bfdalign = bfd_section_alignment (sec);
3509
3510 s = bfd_mach_o_get_mach_o_section (sec);
3511 if (s == NULL)
3512 {
3513 flagword bfd_flags;
3514 static const mach_o_section_name_xlat * xlat;
3515
3516 s = (bfd_mach_o_section *) bfd_zalloc (abfd, sizeof (*s));
3517 if (s == NULL)
3518 return FALSE;
3519 sec->used_by_bfd = s;
3520 s->bfdsection = sec;
3521
3522 /* Create the Darwin seg/sect name pair from the bfd name.
3523 If this is a canonical name for which a specific paiting exists
3524 there will also be defined flags, type, attribute and alignment
3525 values. */
3526 xlat = bfd_mach_o_convert_section_name_to_mach_o (abfd, sec, s);
3527 if (xlat != NULL)
3528 {
3529 s->flags = xlat->macho_sectype | xlat->macho_secattr;
3530 s->align = xlat->sectalign > bfdalign ? xlat->sectalign
3531 : bfdalign;
3532 bfd_set_section_alignment (sec, s->align);
3533 bfd_flags = bfd_section_flags (sec);
3534 if (bfd_flags == SEC_NO_FLAGS)
3535 bfd_set_section_flags (sec, xlat->bfd_flags);
3536 }
3537 else
3538 /* Create default flags. */
3539 bfd_mach_o_set_section_flags_from_bfd (abfd, sec);
3540 }
3541
3542 return _bfd_generic_new_section_hook (abfd, sec);
3543}
3544
3545static void
3546bfd_mach_o_init_section_from_mach_o (asection *sec, unsigned long prot)
3547{
3548 flagword flags;
3549 bfd_mach_o_section *section;
3550
3551 flags = bfd_section_flags (sec);
3552 section = bfd_mach_o_get_mach_o_section (sec);
3553
3554 /* TODO: see if we should use the xlat system for doing this by
3555 preference and fall back to this for unknown sections. */
3556
3557 if (flags == SEC_NO_FLAGS)
3558 {
3559 /* Try to guess flags. */
3560 if (section->flags & BFD_MACH_O_S_ATTR_DEBUG)
3561 flags = SEC_DEBUGGING;
3562 else
3563 {
3564 flags = SEC_ALLOC;
3565 if ((section->flags & BFD_MACH_O_SECTION_TYPE_MASK)
3566 != BFD_MACH_O_S_ZEROFILL)
3567 {
3568 flags |= SEC_LOAD;
3569 if (prot & BFD_MACH_O_PROT_EXECUTE)
3570 flags |= SEC_CODE;
3571 if (prot & BFD_MACH_O_PROT_WRITE)
3572 flags |= SEC_DATA;
3573 else if (prot & BFD_MACH_O_PROT_READ)
3574 flags |= SEC_READONLY;
3575 }
3576 }
3577 }
3578 else
3579 {
3580 if ((flags & SEC_DEBUGGING) == 0)
3581 flags |= SEC_ALLOC;
3582 }
3583
3584 if (section->offset != 0)
3585 flags |= SEC_HAS_CONTENTS;
3586 if (section->nreloc != 0)
3587 flags |= SEC_RELOC;
3588
3589 bfd_set_section_flags (sec, flags);
3590
3591 sec->vma = section->addr;
3592 sec->lma = section->addr;
3593 sec->size = section->size;
3594 sec->filepos = section->offset;
3595 sec->alignment_power = section->align;
3596 sec->segment_mark = 0;
3597 sec->reloc_count = section->nreloc;
3598 sec->rel_filepos = section->reloff;
3599}
3600
3601static asection *
3602bfd_mach_o_make_bfd_section (bfd *abfd,
3603 const unsigned char *segname,
3604 const unsigned char *sectname)
3605{
3606 const char *sname;
3607 flagword flags;
3608
3609 bfd_mach_o_convert_section_name_to_bfd
3610 (abfd, (const char *)segname, (const char *)sectname, &sname, &flags);
3611 if (sname == NULL)
3612 return NULL;
3613
3614 return bfd_make_section_anyway_with_flags (abfd, sname, flags);
3615}
3616
3617static asection *
3618bfd_mach_o_read_section_32 (bfd *abfd, unsigned long prot)
3619{
3620 struct mach_o_section_32_external raw;
3621 asection *sec;
3622 bfd_mach_o_section *section;
3623
3624 if (bfd_bread (&raw, BFD_MACH_O_SECTION_SIZE, abfd)
3625 != BFD_MACH_O_SECTION_SIZE)
3626 return NULL;
3627
3628 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname);
3629 if (sec == NULL)
3630 return NULL;
3631
3632 section = bfd_mach_o_get_mach_o_section (sec);
3633 memcpy (section->segname, raw.segname, sizeof (raw.segname));
3634 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0;
3635 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname));
3636 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0;
3637 section->addr = bfd_h_get_32 (abfd, raw.addr);
3638 section->size = bfd_h_get_32 (abfd, raw.size);
3639 section->offset = bfd_h_get_32 (abfd, raw.offset);
3640 section->align = bfd_h_get_32 (abfd, raw.align);
3641 /* PR 17512: file: 0017eb76. */
3642 if (section->align > 64)
3643 {
3644 _bfd_error_handler
3645 (_("bfd_mach_o_read_section_32: overlarge alignment value: %#lx, "
3646 "using 32 instead"), section->align);
3647 section->align = 32;
3648 }
3649 section->reloff = bfd_h_get_32 (abfd, raw.reloff);
3650 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc);
3651 section->flags = bfd_h_get_32 (abfd, raw.flags);
3652 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1);
3653 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2);
3654 section->reserved3 = 0;
3655
3656 bfd_mach_o_init_section_from_mach_o (sec, prot);
3657
3658 return sec;
3659}
3660
3661static asection *
3662bfd_mach_o_read_section_64 (bfd *abfd, unsigned long prot)
3663{
3664 struct mach_o_section_64_external raw;
3665 asection *sec;
3666 bfd_mach_o_section *section;
3667
3668 if (bfd_bread (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd)
3669 != BFD_MACH_O_SECTION_64_SIZE)
3670 return NULL;
3671
3672 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname);
3673 if (sec == NULL)
3674 return NULL;
3675
3676 section = bfd_mach_o_get_mach_o_section (sec);
3677 memcpy (section->segname, raw.segname, sizeof (raw.segname));
3678 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0;
3679 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname));
3680 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0;
3681 section->addr = bfd_h_get_64 (abfd, raw.addr);
3682 section->size = bfd_h_get_64 (abfd, raw.size);
3683 section->offset = bfd_h_get_32 (abfd, raw.offset);
3684 section->align = bfd_h_get_32 (abfd, raw.align);
3685 if (section->align > 64)
3686 {
3687 _bfd_error_handler
3688 (_("bfd_mach_o_read_section_64: overlarge alignment value: %#lx, "
3689 "using 32 instead"), section->align);
3690 section->align = 32;
3691 }
3692 section->reloff = bfd_h_get_32 (abfd, raw.reloff);
3693 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc);
3694 section->flags = bfd_h_get_32 (abfd, raw.flags);
3695 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1);
3696 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2);
3697 section->reserved3 = bfd_h_get_32 (abfd, raw.reserved3);
3698
3699 bfd_mach_o_init_section_from_mach_o (sec, prot);
3700
3701 return sec;
3702}
3703
3704static asection *
3705bfd_mach_o_read_section (bfd *abfd, unsigned long prot, unsigned int wide)
3706{
3707 if (wide)
3708 return bfd_mach_o_read_section_64 (abfd, prot);
3709 else
3710 return bfd_mach_o_read_section_32 (abfd, prot);
3711}
3712
3713static bfd_boolean
3714bfd_mach_o_read_symtab_symbol (bfd *abfd,
3715 bfd_mach_o_symtab_command *sym,
3716 bfd_mach_o_asymbol *s,
3717 unsigned long i)
3718{
3719 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3720 unsigned int wide = mach_o_wide_p (&mdata->header);
3721 unsigned int symwidth =
3722 wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE;
3723 unsigned int symoff = sym->symoff + (i * symwidth);
3724 struct mach_o_nlist_64_external raw;
3725 unsigned char type = -1;
3726 unsigned char section = -1;
3727 short desc = -1;
3728 symvalue value = -1;
3729 unsigned long stroff = -1;
3730 unsigned int symtype = -1;
3731
3732 BFD_ASSERT (sym->strtab != NULL);
3733
3734 if (bfd_seek (abfd, symoff, SEEK_SET) != 0
3735 || bfd_bread (&raw, symwidth, abfd) != symwidth)
3736 {
3737 _bfd_error_handler
3738 /* xgettext:c-format */
3739 (_("bfd_mach_o_read_symtab_symbol: unable to read %d bytes at %u"),
3740 symwidth, symoff);
3741 return FALSE;
3742 }
3743
3744 stroff = bfd_h_get_32 (abfd, raw.n_strx);
3745 type = bfd_h_get_8 (abfd, raw.n_type);
3746 symtype = type & BFD_MACH_O_N_TYPE;
3747 section = bfd_h_get_8 (abfd, raw.n_sect);
3748 desc = bfd_h_get_16 (abfd, raw.n_desc);
3749 if (wide)
3750 value = bfd_h_get_64 (abfd, raw.n_value);
3751 else
3752 value = bfd_h_get_32 (abfd, raw.n_value);
3753
3754 if (stroff >= sym->strsize)
3755 {
3756 _bfd_error_handler
3757 /* xgettext:c-format */
3758 (_("bfd_mach_o_read_symtab_symbol: name out of range (%lu >= %u)"),
3759 stroff,
3760 sym->strsize);
3761 return FALSE;
3762 }
3763
3764 s->symbol.the_bfd = abfd;
3765 s->symbol.name = sym->strtab + stroff;
3766 s->symbol.value = value;
3767 s->symbol.flags = 0x0;
3768 s->symbol.udata.i = i;
3769 s->n_type = type;
3770 s->n_sect = section;
3771 s->n_desc = desc;
3772
3773 if (type & BFD_MACH_O_N_STAB)
3774 {
3775 s->symbol.flags |= BSF_DEBUGGING;
3776 s->symbol.section = bfd_und_section_ptr;
3777 switch (type)
3778 {
3779 case N_FUN:
3780 case N_STSYM:
3781 case N_LCSYM:
3782 case N_BNSYM:
3783 case N_SLINE:
3784 case N_ENSYM:
3785 case N_ECOMM:
3786 case N_ECOML:
3787 case N_GSYM:
3788 if ((section > 0) && (section <= mdata->nsects))
3789 {
3790 s->symbol.section = mdata->sections[section - 1]->bfdsection;
3791 s->symbol.value =
3792 s->symbol.value - mdata->sections[section - 1]->addr;
3793 }
3794 break;
3795 }
3796 }
3797 else
3798 {
3799 if (type & (BFD_MACH_O_N_PEXT | BFD_MACH_O_N_EXT))
3800 s->symbol.flags |= BSF_GLOBAL;
3801 else
3802 s->symbol.flags |= BSF_LOCAL;
3803
3804 switch (symtype)
3805 {
3806 case BFD_MACH_O_N_UNDF:
3807 if (type == (BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT)
3808 && s->symbol.value != 0)
3809 {
3810 /* A common symbol. */
3811 s->symbol.section = bfd_com_section_ptr;
3812 s->symbol.flags = BSF_NO_FLAGS;
3813 }
3814 else
3815 {
3816 s->symbol.section = bfd_und_section_ptr;
3817 if (s->n_desc & BFD_MACH_O_N_WEAK_REF)
3818 s->symbol.flags |= BSF_WEAK;
3819 }
3820 break;
3821 case BFD_MACH_O_N_PBUD:
3822 s->symbol.section = bfd_und_section_ptr;
3823 break;
3824 case BFD_MACH_O_N_ABS:
3825 s->symbol.section = bfd_abs_section_ptr;
3826 break;
3827 case BFD_MACH_O_N_SECT:
3828 if ((section > 0) && (section <= mdata->nsects))
3829 {
3830 s->symbol.section = mdata->sections[section - 1]->bfdsection;
3831 s->symbol.value =
3832 s->symbol.value - mdata->sections[section - 1]->addr;
3833 }
3834 else
3835 {
3836 /* Mach-O uses 0 to mean "no section"; not an error. */
3837 if (section != 0)
3838 {
3839 _bfd_error_handler
3840 /* xgettext:c-format */
3841 (_("bfd_mach_o_read_symtab_symbol: "
3842 "symbol \"%s\" specified invalid section %d (max %lu): "
3843 "setting to undefined"),
3844 s->symbol.name, section, mdata->nsects);
3845 }
3846 s->symbol.section = bfd_und_section_ptr;
3847 }
3848 break;
3849 case BFD_MACH_O_N_INDR:
3850 /* FIXME: we don't follow the BFD convention as this indirect symbol
3851 won't be followed by the referenced one. This looks harmless
3852 unless we start using the linker. */
3853 s->symbol.flags |= BSF_INDIRECT;
3854 s->symbol.section = bfd_ind_section_ptr;
3855 s->symbol.value = 0;
3856 break;
3857 default:
3858 _bfd_error_handler
3859 /* xgettext:c-format */
3860 (_("bfd_mach_o_read_symtab_symbol: "
3861 "symbol \"%s\" specified invalid type field 0x%x: "
3862 "setting to undefined"), s->symbol.name, symtype);
3863 s->symbol.section = bfd_und_section_ptr;
3864 break;
3865 }
3866 }
3867
3868 return TRUE;
3869}
3870
3871bfd_boolean
3872bfd_mach_o_read_symtab_strtab (bfd *abfd)
3873{
3874 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3875 bfd_mach_o_symtab_command *sym = mdata->symtab;
3876
3877 /* Fail if there is no symtab. */
3878 if (sym == NULL)
3879 return FALSE;
3880
3881 /* Success if already loaded. */
3882 if (sym->strtab)
3883 return TRUE;
3884
3885 if (abfd->flags & BFD_IN_MEMORY)
3886 {
3887 struct bfd_in_memory *b;
3888
3889 b = (struct bfd_in_memory *) abfd->iostream;
3890
3891 if ((sym->stroff + sym->strsize) > b->size)
3892 {
3893 bfd_set_error (bfd_error_file_truncated);
3894 return FALSE;
3895 }
3896 sym->strtab = (char *) b->buffer + sym->stroff;
3897 }
3898 else
3899 {
3900 /* See PR 21840 for a reproducer. */
3901 if ((sym->strsize + 1) == 0)
3902 return FALSE;
3903 if (bfd_seek (abfd, sym->stroff, SEEK_SET) != 0)
3904 return FALSE;
3905 sym->strtab = (char *) _bfd_alloc_and_read (abfd, sym->strsize + 1,
3906 sym->strsize);
3907 if (sym->strtab == NULL)
3908 return FALSE;
3909
3910 /* Zero terminate the string table. */
3911 sym->strtab[sym->strsize] = 0;
3912 }
3913
3914 return TRUE;
3915}
3916
3917bfd_boolean
3918bfd_mach_o_read_symtab_symbols (bfd *abfd)
3919{
3920 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3921 bfd_mach_o_symtab_command *sym = mdata->symtab;
3922 unsigned long i;
3923 size_t amt;
3924
3925 if (sym == NULL || sym->symbols)
3926 /* Return now if there are no symbols or if already loaded. */
3927 return TRUE;
3928
3929 if (_bfd_mul_overflow (sym->nsyms, sizeof (bfd_mach_o_asymbol), &amt)
3930 || (sym->symbols = bfd_alloc (abfd, amt)) == NULL)
3931 {
3932 bfd_set_error (bfd_error_no_memory);
3933 _bfd_error_handler (_("bfd_mach_o_read_symtab_symbols: "
3934 "unable to allocate memory for symbols"));
3935 sym->nsyms = 0;
3936 return FALSE;
3937 }
3938
3939 if (!bfd_mach_o_read_symtab_strtab (abfd))
3940 goto fail;
3941
3942 for (i = 0; i < sym->nsyms; i++)
3943 if (!bfd_mach_o_read_symtab_symbol (abfd, sym, &sym->symbols[i], i))
3944 goto fail;
3945
3946 return TRUE;
3947
3948 fail:
3949 bfd_release (abfd, sym->symbols);
3950 sym->symbols = NULL;
3951 sym->nsyms = 0;
3952 return FALSE;
3953}
3954
3955static const char *
3956bfd_mach_o_i386_flavour_string (unsigned int flavour)
3957{
3958 switch ((int) flavour)
3959 {
3960 case BFD_MACH_O_x86_THREAD_STATE32: return "x86_THREAD_STATE32";
3961 case BFD_MACH_O_x86_FLOAT_STATE32: return "x86_FLOAT_STATE32";
3962 case BFD_MACH_O_x86_EXCEPTION_STATE32: return "x86_EXCEPTION_STATE32";
3963 case BFD_MACH_O_x86_THREAD_STATE64: return "x86_THREAD_STATE64";
3964 case BFD_MACH_O_x86_FLOAT_STATE64: return "x86_FLOAT_STATE64";
3965 case BFD_MACH_O_x86_EXCEPTION_STATE64: return "x86_EXCEPTION_STATE64";
3966 case BFD_MACH_O_x86_THREAD_STATE: return "x86_THREAD_STATE";
3967 case BFD_MACH_O_x86_FLOAT_STATE: return "x86_FLOAT_STATE";
3968 case BFD_MACH_O_x86_EXCEPTION_STATE: return "x86_EXCEPTION_STATE";
3969 case BFD_MACH_O_x86_DEBUG_STATE32: return "x86_DEBUG_STATE32";
3970 case BFD_MACH_O_x86_DEBUG_STATE64: return "x86_DEBUG_STATE64";
3971 case BFD_MACH_O_x86_DEBUG_STATE: return "x86_DEBUG_STATE";
3972 case BFD_MACH_O_x86_THREAD_STATE_NONE: return "x86_THREAD_STATE_NONE";
3973 default: return "UNKNOWN";
3974 }
3975}
3976
3977static const char *
3978bfd_mach_o_ppc_flavour_string (unsigned int flavour)
3979{
3980 switch ((int) flavour)
3981 {
3982 case BFD_MACH_O_PPC_THREAD_STATE: return "PPC_THREAD_STATE";
3983 case BFD_MACH_O_PPC_FLOAT_STATE: return "PPC_FLOAT_STATE";
3984 case BFD_MACH_O_PPC_EXCEPTION_STATE: return "PPC_EXCEPTION_STATE";
3985 case BFD_MACH_O_PPC_VECTOR_STATE: return "PPC_VECTOR_STATE";
3986 case BFD_MACH_O_PPC_THREAD_STATE64: return "PPC_THREAD_STATE64";
3987 case BFD_MACH_O_PPC_EXCEPTION_STATE64: return "PPC_EXCEPTION_STATE64";
3988 default: return "UNKNOWN";
3989 }
3990}
3991
3992static unsigned char *
3993bfd_mach_o_alloc_and_read (bfd *abfd, file_ptr filepos, size_t size)
3994{
3995 if (bfd_seek (abfd, filepos, SEEK_SET) != 0)
3996 return NULL;
3997 return _bfd_alloc_and_read (abfd, size, size);
3998}
3999
4000static bfd_boolean
4001bfd_mach_o_read_dylinker (bfd *abfd, bfd_mach_o_load_command *command)
4002{
4003 bfd_mach_o_dylinker_command *cmd = &command->command.dylinker;
4004 struct mach_o_str_command_external raw;
4005 unsigned int nameoff;
4006 unsigned int namelen;
4007
4008 if (command->len < sizeof (raw) + 8)
4009 return FALSE;
4010 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4011 return FALSE;
4012
4013 nameoff = bfd_h_get_32 (abfd, raw.str);
4014 if (nameoff > command->len)
4015 return FALSE;
4016
4017 cmd->name_offset = nameoff;
4018 namelen = command->len - nameoff;
4019 nameoff += command->offset;
4020 cmd->name_str = (char *) bfd_mach_o_alloc_and_read (abfd, nameoff, namelen);
4021 return cmd->name_str != NULL;
4022}
4023
4024static bfd_boolean
4025bfd_mach_o_read_dylib (bfd *abfd, bfd_mach_o_load_command *command)
4026{
4027 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4028 bfd_mach_o_dylib_command *cmd = &command->command.dylib;
4029 struct mach_o_dylib_command_external raw;
4030 unsigned int nameoff;
4031 unsigned int namelen;
4032 file_ptr pos;
4033
4034 if (command->len < sizeof (raw) + 8)
4035 return FALSE;
4036 switch (command->type)
4037 {
4038 case BFD_MACH_O_LC_LOAD_DYLIB:
4039 case BFD_MACH_O_LC_LAZY_LOAD_DYLIB:
4040 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
4041 case BFD_MACH_O_LC_ID_DYLIB:
4042 case BFD_MACH_O_LC_REEXPORT_DYLIB:
4043 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
4044 break;
4045 default:
4046 BFD_FAIL ();
4047 return FALSE;
4048 }
4049
4050 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4051 return FALSE;
4052
4053 nameoff = bfd_h_get_32 (abfd, raw.name);
4054 if (nameoff > command->len)
4055 return FALSE;
4056 cmd->timestamp = bfd_h_get_32 (abfd, raw.timestamp);
4057 cmd->current_version = bfd_h_get_32 (abfd, raw.current_version);
4058 cmd->compatibility_version = bfd_h_get_32 (abfd, raw.compatibility_version);
4059
4060 cmd->name_offset = command->offset + nameoff;
4061 namelen = command->len - nameoff;
4062 pos = mdata->hdr_offset + cmd->name_offset;
4063 cmd->name_str = (char *) bfd_mach_o_alloc_and_read (abfd, pos, namelen);
4064 return cmd->name_str != NULL;
4065}
4066
4067static bfd_boolean
4068bfd_mach_o_read_prebound_dylib (bfd *abfd,
4069 bfd_mach_o_load_command *command)
4070{
4071 bfd_mach_o_prebound_dylib_command *cmd = &command->command.prebound_dylib;
4072 struct mach_o_prebound_dylib_command_external raw;
4073 unsigned int nameoff;
4074 unsigned int modoff;
4075 unsigned int str_len;
4076 unsigned char *str;
4077
4078 if (command->len < sizeof (raw) + 8)
4079 return FALSE;
4080 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4081 return FALSE;
4082
4083 nameoff = bfd_h_get_32 (abfd, raw.name);
4084 modoff = bfd_h_get_32 (abfd, raw.linked_modules);
4085 if (nameoff > command->len || modoff > command->len)
4086 return FALSE;
4087
4088 str_len = command->len - sizeof (raw);
4089 str = _bfd_alloc_and_read (abfd, str_len, str_len);
4090 if (str == NULL)
4091 return FALSE;
4092
4093 cmd->name_offset = command->offset + nameoff;
4094 cmd->nmodules = bfd_h_get_32 (abfd, raw.nmodules);
4095 cmd->linked_modules_offset = command->offset + modoff;
4096
4097 cmd->name_str = (char *)str + nameoff - (sizeof (raw) + BFD_MACH_O_LC_SIZE);
4098 cmd->linked_modules = str + modoff - (sizeof (raw) + BFD_MACH_O_LC_SIZE);
4099 return TRUE;
4100}
4101
4102static bfd_boolean
4103bfd_mach_o_read_prebind_cksum (bfd *abfd,
4104 bfd_mach_o_load_command *command)
4105{
4106 bfd_mach_o_prebind_cksum_command *cmd = &command->command.prebind_cksum;
4107 struct mach_o_prebind_cksum_command_external raw;
4108
4109 if (command->len < sizeof (raw) + 8)
4110 return FALSE;
4111 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4112 return FALSE;
4113
4114 cmd->cksum = bfd_get_32 (abfd, raw.cksum);
4115 return TRUE;
4116}
4117
4118static bfd_boolean
4119bfd_mach_o_read_twolevel_hints (bfd *abfd,
4120 bfd_mach_o_load_command *command)
4121{
4122 bfd_mach_o_twolevel_hints_command *cmd = &command->command.twolevel_hints;
4123 struct mach_o_twolevel_hints_command_external raw;
4124
4125 if (command->len < sizeof (raw) + 8)
4126 return FALSE;
4127 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4128 return FALSE;
4129
4130 cmd->offset = bfd_get_32 (abfd, raw.offset);
4131 cmd->nhints = bfd_get_32 (abfd, raw.nhints);
4132 return TRUE;
4133}
4134
4135static bfd_boolean
4136bfd_mach_o_read_fvmlib (bfd *abfd, bfd_mach_o_load_command *command)
4137{
4138 bfd_mach_o_fvmlib_command *fvm = &command->command.fvmlib;
4139 struct mach_o_fvmlib_command_external raw;
4140 unsigned int nameoff;
4141 unsigned int namelen;
4142
4143 if (command->len < sizeof (raw) + 8)
4144 return FALSE;
4145 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4146 return FALSE;
4147
4148 nameoff = bfd_h_get_32 (abfd, raw.name);
4149 if (nameoff > command->len)
4150 return FALSE;
4151 fvm->minor_version = bfd_h_get_32 (abfd, raw.minor_version);
4152 fvm->header_addr = bfd_h_get_32 (abfd, raw.header_addr);
4153
4154 fvm->name_offset = command->offset + nameoff;
4155 namelen = command->len - nameoff;
4156 fvm->name_str = (char *) bfd_mach_o_alloc_and_read (abfd, fvm->name_offset,
4157 namelen);
4158 return fvm->name_str != NULL;
4159}
4160
4161static bfd_boolean
4162bfd_mach_o_read_thread (bfd *abfd, bfd_mach_o_load_command *command)
4163{
4164 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4165 bfd_mach_o_thread_command *cmd = &command->command.thread;
4166 unsigned int offset;
4167 unsigned int nflavours;
4168 unsigned int i;
4169 struct mach_o_thread_command_external raw;
4170 size_t amt;
4171
4172 BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD)
4173 || (command->type == BFD_MACH_O_LC_UNIXTHREAD));
4174
4175 /* Count the number of threads. */
4176 offset = 8;
4177 nflavours = 0;
4178 while (offset + sizeof (raw) <= command->len)
4179 {
4180 unsigned int count;
4181
4182 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
4183 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4184 return FALSE;
4185
4186 count = bfd_h_get_32 (abfd, raw.count);
4187 if (count > (unsigned) -1 / 4
4188 || command->len - (offset + sizeof (raw)) < count * 4)
4189 return FALSE;
4190 offset += sizeof (raw) + count * 4;
4191 nflavours++;
4192 }
4193 if (nflavours == 0 || offset != command->len)
4194 return FALSE;
4195
4196 /* Allocate threads. */
4197 if (_bfd_mul_overflow (nflavours, sizeof (bfd_mach_o_thread_flavour), &amt))
4198 {
4199 bfd_set_error (bfd_error_file_too_big);
4200 return FALSE;
4201 }
4202 cmd->flavours = bfd_alloc (abfd, amt);
4203 if (cmd->flavours == NULL)
4204 return FALSE;
4205 cmd->nflavours = nflavours;
4206
4207 offset = 8;
4208 nflavours = 0;
4209 while (offset != command->len)
4210 {
4211 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
4212 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4213 return FALSE;
4214
4215 cmd->flavours[nflavours].flavour = bfd_h_get_32 (abfd, raw.flavour);
4216 cmd->flavours[nflavours].offset = command->offset + offset + sizeof (raw);
4217 cmd->flavours[nflavours].size = bfd_h_get_32 (abfd, raw.count) * 4;
4218 offset += cmd->flavours[nflavours].size + sizeof (raw);
4219 nflavours++;
4220 }
4221
4222 for (i = 0; i < nflavours; i++)
4223 {
4224 asection *bfdsec;
4225 unsigned int snamelen;
4226 char *sname;
4227 const char *flavourstr;
4228 const char *prefix = "LC_THREAD";
4229 unsigned int j = 0;
4230
4231 switch (mdata->header.cputype)
4232 {
4233 case BFD_MACH_O_CPU_TYPE_POWERPC:
4234 case BFD_MACH_O_CPU_TYPE_POWERPC_64:
4235 flavourstr =
4236 bfd_mach_o_ppc_flavour_string (cmd->flavours[i].flavour);
4237 break;
4238 case BFD_MACH_O_CPU_TYPE_I386:
4239 case BFD_MACH_O_CPU_TYPE_X86_64:
4240 flavourstr =
4241 bfd_mach_o_i386_flavour_string (cmd->flavours[i].flavour);
4242 break;
4243 default:
4244 flavourstr = "UNKNOWN_ARCHITECTURE";
4245 break;
4246 }
4247
4248 snamelen = strlen (prefix) + 1 + 20 + 1 + strlen (flavourstr) + 1;
4249 sname = bfd_alloc (abfd, snamelen);
4250 if (sname == NULL)
4251 return FALSE;
4252
4253 for (;;)
4254 {
4255 sprintf (sname, "%s.%s.%u", prefix, flavourstr, j);
4256 if (bfd_get_section_by_name (abfd, sname) == NULL)
4257 break;
4258 j++;
4259 }
4260
4261 bfdsec = bfd_make_section_with_flags (abfd, sname, SEC_HAS_CONTENTS);
4262
4263 bfdsec->vma = 0;
4264 bfdsec->lma = 0;
4265 bfdsec->size = cmd->flavours[i].size;
4266 bfdsec->filepos = cmd->flavours[i].offset;
4267 bfdsec->alignment_power = 0x0;
4268
4269 cmd->section = bfdsec;
4270 }
4271
4272 return TRUE;
4273}
4274
4275static bfd_boolean
4276bfd_mach_o_read_dysymtab (bfd *abfd, bfd_mach_o_load_command *command)
4277{
4278 bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab;
4279 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4280
4281 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB);
4282
4283 {
4284 struct mach_o_dysymtab_command_external raw;
4285
4286 if (command->len < sizeof (raw) + 8)
4287 return FALSE;
4288 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4289 return FALSE;
4290
4291 cmd->ilocalsym = bfd_h_get_32 (abfd, raw.ilocalsym);
4292 cmd->nlocalsym = bfd_h_get_32 (abfd, raw.nlocalsym);
4293 cmd->iextdefsym = bfd_h_get_32 (abfd, raw.iextdefsym);
4294 cmd->nextdefsym = bfd_h_get_32 (abfd, raw.nextdefsym);
4295 cmd->iundefsym = bfd_h_get_32 (abfd, raw.iundefsym);
4296 cmd->nundefsym = bfd_h_get_32 (abfd, raw.nundefsym);
4297 cmd->tocoff = bfd_h_get_32 (abfd, raw.tocoff);
4298 cmd->ntoc = bfd_h_get_32 (abfd, raw.ntoc);
4299 cmd->modtaboff = bfd_h_get_32 (abfd, raw.modtaboff);
4300 cmd->nmodtab = bfd_h_get_32 (abfd, raw.nmodtab);
4301 cmd->extrefsymoff = bfd_h_get_32 (abfd, raw.extrefsymoff);
4302 cmd->nextrefsyms = bfd_h_get_32 (abfd, raw.nextrefsyms);
4303 cmd->indirectsymoff = bfd_h_get_32 (abfd, raw.indirectsymoff);
4304 cmd->nindirectsyms = bfd_h_get_32 (abfd, raw.nindirectsyms);
4305 cmd->extreloff = bfd_h_get_32 (abfd, raw.extreloff);
4306 cmd->nextrel = bfd_h_get_32 (abfd, raw.nextrel);
4307 cmd->locreloff = bfd_h_get_32 (abfd, raw.locreloff);
4308 cmd->nlocrel = bfd_h_get_32 (abfd, raw.nlocrel);
4309 }
4310
4311 if (cmd->nmodtab != 0)
4312 {
4313 unsigned int i;
4314 int wide = bfd_mach_o_wide_p (abfd);
4315 unsigned int module_len = wide ? 56 : 52;
4316 size_t amt;
4317
4318 if (_bfd_mul_overflow (cmd->nmodtab,
4319 sizeof (bfd_mach_o_dylib_module), &amt))
4320 {
4321 bfd_set_error (bfd_error_file_too_big);
4322 return FALSE;
4323 }
4324 cmd->dylib_module = bfd_alloc (abfd, amt);
4325 if (cmd->dylib_module == NULL)
4326 return FALSE;
4327
4328 if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0)
4329 return FALSE;
4330
4331 for (i = 0; i < cmd->nmodtab; i++)
4332 {
4333 bfd_mach_o_dylib_module *module = &cmd->dylib_module[i];
4334 unsigned long v;
4335 unsigned char buf[56];
4336
4337 if (bfd_bread ((void *) buf, module_len, abfd) != module_len)
4338 return FALSE;
4339
4340 module->module_name_idx = bfd_h_get_32 (abfd, buf + 0);
4341 module->iextdefsym = bfd_h_get_32 (abfd, buf + 4);
4342 module->nextdefsym = bfd_h_get_32 (abfd, buf + 8);
4343 module->irefsym = bfd_h_get_32 (abfd, buf + 12);
4344 module->nrefsym = bfd_h_get_32 (abfd, buf + 16);
4345 module->ilocalsym = bfd_h_get_32 (abfd, buf + 20);
4346 module->nlocalsym = bfd_h_get_32 (abfd, buf + 24);
4347 module->iextrel = bfd_h_get_32 (abfd, buf + 28);
4348 module->nextrel = bfd_h_get_32 (abfd, buf + 32);
4349 v = bfd_h_get_32 (abfd, buf +36);
4350 module->iinit = v & 0xffff;
4351 module->iterm = (v >> 16) & 0xffff;
4352 v = bfd_h_get_32 (abfd, buf + 40);
4353 module->ninit = v & 0xffff;
4354 module->nterm = (v >> 16) & 0xffff;
4355 if (wide)
4356 {
4357 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 44);
4358 module->objc_module_info_addr = bfd_h_get_64 (abfd, buf + 48);
4359 }
4360 else
4361 {
4362 module->objc_module_info_addr = bfd_h_get_32 (abfd, buf + 44);
4363 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 48);
4364 }
4365 }
4366 }
4367
4368 if (cmd->ntoc != 0)
4369 {
4370 unsigned long i;
4371 size_t amt;
4372
4373 if (_bfd_mul_overflow (cmd->ntoc,
4374 sizeof (bfd_mach_o_dylib_table_of_content), &amt))
4375 {
4376 bfd_set_error (bfd_error_file_too_big);
4377 return FALSE;
4378 }
4379 cmd->dylib_toc = bfd_alloc (abfd, amt);
4380 if (cmd->dylib_toc == NULL)
4381 return FALSE;
4382
4383 if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0)
4384 return FALSE;
4385
4386 for (i = 0; i < cmd->ntoc; i++)
4387 {
4388 struct mach_o_dylib_table_of_contents_external raw;
4389 bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i];
4390
4391 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4392 return FALSE;
4393
4394 toc->symbol_index = bfd_h_get_32 (abfd, raw.symbol_index);
4395 toc->module_index = bfd_h_get_32 (abfd, raw.module_index);
4396 }
4397 }
4398
4399 if (cmd->nindirectsyms != 0)
4400 {
4401 unsigned int i;
4402 size_t amt;
4403
4404 if (_bfd_mul_overflow (cmd->nindirectsyms, sizeof (unsigned int), &amt))
4405 {
4406 bfd_set_error (bfd_error_file_too_big);
4407 return FALSE;
4408 }
4409 cmd->indirect_syms = bfd_alloc (abfd, amt);
4410 if (cmd->indirect_syms == NULL)
4411 return FALSE;
4412
4413 if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0)
4414 return FALSE;
4415
4416 for (i = 0; i < cmd->nindirectsyms; i++)
4417 {
4418 unsigned char raw[4];
4419 unsigned int *is = &cmd->indirect_syms[i];
4420
4421 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw))
4422 return FALSE;
4423
4424 *is = bfd_h_get_32 (abfd, raw);
4425 }
4426 }
4427
4428 if (cmd->nextrefsyms != 0)
4429 {
4430 unsigned long v;
4431 unsigned int i;
4432 size_t amt;
4433
4434 if (_bfd_mul_overflow (cmd->nextrefsyms,
4435 sizeof (bfd_mach_o_dylib_reference), &amt))
4436 {
4437 bfd_set_error (bfd_error_file_too_big);
4438 return FALSE;
4439 }
4440 cmd->ext_refs = bfd_alloc (abfd, amt);
4441 if (cmd->ext_refs == NULL)
4442 return FALSE;
4443
4444 if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0)
4445 return FALSE;
4446
4447 for (i = 0; i < cmd->nextrefsyms; i++)
4448 {
4449 unsigned char raw[4];
4450 bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i];
4451
4452 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw))
4453 return FALSE;
4454
4455 /* Fields isym and flags are written as bit-fields, thus we need
4456 a specific processing for endianness. */
4457 v = bfd_h_get_32 (abfd, raw);
4458 if (bfd_big_endian (abfd))
4459 {
4460 ref->isym = (v >> 8) & 0xffffff;
4461 ref->flags = v & 0xff;
4462 }
4463 else
4464 {
4465 ref->isym = v & 0xffffff;
4466 ref->flags = (v >> 24) & 0xff;
4467 }
4468 }
4469 }
4470
4471 if (mdata->dysymtab)
4472 return FALSE;
4473 mdata->dysymtab = cmd;
4474
4475 return TRUE;
4476}
4477
4478static bfd_boolean
4479bfd_mach_o_read_symtab (bfd *abfd, bfd_mach_o_load_command *command)
4480{
4481 bfd_mach_o_symtab_command *symtab = &command->command.symtab;
4482 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4483 struct mach_o_symtab_command_external raw;
4484
4485 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB);
4486
4487 if (command->len < sizeof (raw) + 8)
4488 return FALSE;
4489 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4490 return FALSE;
4491
4492 symtab->symoff = bfd_h_get_32 (abfd, raw.symoff);
4493 symtab->nsyms = bfd_h_get_32 (abfd, raw.nsyms);
4494 symtab->stroff = bfd_h_get_32 (abfd, raw.stroff);
4495 symtab->strsize = bfd_h_get_32 (abfd, raw.strsize);
4496 symtab->symbols = NULL;
4497 symtab->strtab = NULL;
4498
4499 if (symtab->nsyms != 0)
4500 abfd->flags |= HAS_SYMS;
4501
4502 if (mdata->symtab)
4503 return FALSE;
4504 mdata->symtab = symtab;
4505 return TRUE;
4506}
4507
4508static bfd_boolean
4509bfd_mach_o_read_uuid (bfd *abfd, bfd_mach_o_load_command *command)
4510{
4511 bfd_mach_o_uuid_command *cmd = &command->command.uuid;
4512
4513 BFD_ASSERT (command->type == BFD_MACH_O_LC_UUID);
4514
4515 if (command->len < 16 + 8)
4516 return FALSE;
4517 if (bfd_bread (cmd->uuid, 16, abfd) != 16)
4518 return FALSE;
4519
4520 return TRUE;
4521}
4522
4523static bfd_boolean
4524bfd_mach_o_read_linkedit (bfd *abfd, bfd_mach_o_load_command *command)
4525{
4526 bfd_mach_o_linkedit_command *cmd = &command->command.linkedit;
4527 struct mach_o_linkedit_data_command_external raw;
4528
4529 if (command->len < sizeof (raw) + 8)
4530 return FALSE;
4531 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4532 return FALSE;
4533
4534 cmd->dataoff = bfd_get_32 (abfd, raw.dataoff);
4535 cmd->datasize = bfd_get_32 (abfd, raw.datasize);
4536 return TRUE;
4537}
4538
4539static bfd_boolean
4540bfd_mach_o_read_str (bfd *abfd, bfd_mach_o_load_command *command)
4541{
4542 bfd_mach_o_str_command *cmd = &command->command.str;
4543 struct mach_o_str_command_external raw;
4544 unsigned long off;
4545
4546 if (command->len < sizeof (raw) + 8)
4547 return FALSE;
4548 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4549 return FALSE;
4550
4551 off = bfd_get_32 (abfd, raw.str);
4552 if (off > command->len)
4553 return FALSE;
4554
4555 cmd->stroff = command->offset + off;
4556 cmd->str_len = command->len - off;
4557 cmd->str = (char *) bfd_mach_o_alloc_and_read (abfd, cmd->stroff,
4558 cmd->str_len);
4559 return cmd->str != NULL;
4560}
4561
4562static bfd_boolean
4563bfd_mach_o_read_dyld_content (bfd *abfd, bfd_mach_o_dyld_info_command *cmd)
4564{
4565 /* Read rebase content. */
4566 if (cmd->rebase_content == NULL && cmd->rebase_size != 0)
4567 {
4568 cmd->rebase_content
4569 = bfd_mach_o_alloc_and_read (abfd, cmd->rebase_off, cmd->rebase_size);
4570 if (cmd->rebase_content == NULL)
4571 return FALSE;
4572 }
4573
4574 /* Read bind content. */
4575 if (cmd->bind_content == NULL && cmd->bind_size != 0)
4576 {
4577 cmd->bind_content
4578 = bfd_mach_o_alloc_and_read (abfd, cmd->bind_off, cmd->bind_size);
4579 if (cmd->bind_content == NULL)
4580 return FALSE;
4581 }
4582
4583 /* Read weak bind content. */
4584 if (cmd->weak_bind_content == NULL && cmd->weak_bind_size != 0)
4585 {
4586 cmd->weak_bind_content = bfd_mach_o_alloc_and_read
4587 (abfd, cmd->weak_bind_off, cmd->weak_bind_size);
4588 if (cmd->weak_bind_content == NULL)
4589 return FALSE;
4590 }
4591
4592 /* Read lazy bind content. */
4593 if (cmd->lazy_bind_content == NULL && cmd->lazy_bind_size != 0)
4594 {
4595 cmd->lazy_bind_content = bfd_mach_o_alloc_and_read
4596 (abfd, cmd->lazy_bind_off, cmd->lazy_bind_size);
4597 if (cmd->lazy_bind_content == NULL)
4598 return FALSE;
4599 }
4600
4601 /* Read export content. */
4602 if (cmd->export_content == NULL && cmd->export_size != 0)
4603 {
4604 cmd->export_content = bfd_mach_o_alloc_and_read
4605 (abfd, cmd->export_off, cmd->export_size);
4606 if (cmd->export_content == NULL)
4607 return FALSE;
4608 }
4609
4610 return TRUE;
4611}
4612
4613static bfd_boolean
4614bfd_mach_o_read_dyld_info (bfd *abfd, bfd_mach_o_load_command *command)
4615{
4616 bfd_mach_o_dyld_info_command *cmd = &command->command.dyld_info;
4617 struct mach_o_dyld_info_command_external raw;
4618
4619 if (command->len < sizeof (raw) + 8)
4620 return FALSE;
4621 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4622 return FALSE;
4623
4624 cmd->rebase_off = bfd_get_32 (abfd, raw.rebase_off);
4625 cmd->rebase_size = bfd_get_32 (abfd, raw.rebase_size);
4626 cmd->rebase_content = NULL;
4627 cmd->bind_off = bfd_get_32 (abfd, raw.bind_off);
4628 cmd->bind_size = bfd_get_32 (abfd, raw.bind_size);
4629 cmd->bind_content = NULL;
4630 cmd->weak_bind_off = bfd_get_32 (abfd, raw.weak_bind_off);
4631 cmd->weak_bind_size = bfd_get_32 (abfd, raw.weak_bind_size);
4632 cmd->weak_bind_content = NULL;
4633 cmd->lazy_bind_off = bfd_get_32 (abfd, raw.lazy_bind_off);
4634 cmd->lazy_bind_size = bfd_get_32 (abfd, raw.lazy_bind_size);
4635 cmd->lazy_bind_content = NULL;
4636 cmd->export_off = bfd_get_32 (abfd, raw.export_off);
4637 cmd->export_size = bfd_get_32 (abfd, raw.export_size);
4638 cmd->export_content = NULL;
4639 return TRUE;
4640}
4641
4642static bfd_boolean
4643bfd_mach_o_read_version_min (bfd *abfd, bfd_mach_o_load_command *command)
4644{
4645 bfd_mach_o_version_min_command *cmd = &command->command.version_min;
4646 struct mach_o_version_min_command_external raw;
4647
4648 if (command->len < sizeof (raw) + 8)
4649 return FALSE;
4650 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4651 return FALSE;
4652
4653 cmd->version = bfd_get_32 (abfd, raw.version);
4654 cmd->sdk = bfd_get_32 (abfd, raw.sdk);
4655 return TRUE;
4656}
4657
4658static bfd_boolean
4659bfd_mach_o_read_encryption_info (bfd *abfd, bfd_mach_o_load_command *command)
4660{
4661 bfd_mach_o_encryption_info_command *cmd = &command->command.encryption_info;
4662 struct mach_o_encryption_info_command_external raw;
4663
4664 if (command->len < sizeof (raw) + 8)
4665 return FALSE;
4666 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4667 return FALSE;
4668
4669 cmd->cryptoff = bfd_get_32 (abfd, raw.cryptoff);
4670 cmd->cryptsize = bfd_get_32 (abfd, raw.cryptsize);
4671 cmd->cryptid = bfd_get_32 (abfd, raw.cryptid);
4672 return TRUE;
4673}
4674
4675static bfd_boolean
4676bfd_mach_o_read_encryption_info_64 (bfd *abfd, bfd_mach_o_load_command *command)
4677{
4678 bfd_mach_o_encryption_info_command *cmd = &command->command.encryption_info;
4679 struct mach_o_encryption_info_64_command_external raw;
4680
4681 if (command->len < sizeof (raw) + 8)
4682 return FALSE;
4683 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4684 return FALSE;
4685
4686 cmd->cryptoff = bfd_get_32 (abfd, raw.cryptoff);
4687 cmd->cryptsize = bfd_get_32 (abfd, raw.cryptsize);
4688 cmd->cryptid = bfd_get_32 (abfd, raw.cryptid);
4689 return TRUE;
4690}
4691
4692static bfd_boolean
4693bfd_mach_o_read_main (bfd *abfd, bfd_mach_o_load_command *command)
4694{
4695 bfd_mach_o_main_command *cmd = &command->command.main;
4696 struct mach_o_entry_point_command_external raw;
4697
4698 if (command->len < sizeof (raw) + 8)
4699 return FALSE;
4700 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4701 return FALSE;
4702
4703 cmd->entryoff = bfd_get_64 (abfd, raw.entryoff);
4704 cmd->stacksize = bfd_get_64 (abfd, raw.stacksize);
4705 return TRUE;
4706}
4707
4708static bfd_boolean
4709bfd_mach_o_read_source_version (bfd *abfd, bfd_mach_o_load_command *command)
4710{
4711 bfd_mach_o_source_version_command *cmd = &command->command.source_version;
4712 struct mach_o_source_version_command_external raw;
4713 bfd_uint64_t ver;
4714
4715 if (command->len < sizeof (raw) + 8)
4716 return FALSE;
4717 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4718 return FALSE;
4719
4720 ver = bfd_get_64 (abfd, raw.version);
4721 /* Note: we use a serie of shift to avoid shift > 32 (for which gcc
4722 generates warnings) in case of the host doesn't support 64 bit
4723 integers. */
4724 cmd->e = ver & 0x3ff;
4725 ver >>= 10;
4726 cmd->d = ver & 0x3ff;
4727 ver >>= 10;
4728 cmd->c = ver & 0x3ff;
4729 ver >>= 10;
4730 cmd->b = ver & 0x3ff;
4731 ver >>= 10;
4732 cmd->a = ver & 0xffffff;
4733 return TRUE;
4734}
4735
4736static bfd_boolean
4737bfd_mach_o_read_note (bfd *abfd, bfd_mach_o_load_command *command)
4738{
4739 bfd_mach_o_note_command *cmd = &command->command.note;
4740 struct mach_o_note_command_external raw;
4741
4742 if (command->len < sizeof (raw) + 8)
4743 return FALSE;
4744 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4745 return FALSE;
4746
4747 memcpy (cmd->data_owner, raw.data_owner, 16);
4748 cmd->offset = bfd_get_64 (abfd, raw.offset);
4749 cmd->size = bfd_get_64 (abfd, raw.size);
4750 return TRUE;
4751}
4752
4753static bfd_boolean
4754bfd_mach_o_read_build_version (bfd *abfd, bfd_mach_o_load_command *command)
4755{
4756 bfd_mach_o_build_version_command *cmd = &command->command.build_version;
4757 struct mach_o_build_version_command_external raw;
4758
4759 if (command->len < sizeof (raw) + 8)
4760 return FALSE;
4761 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4762 return FALSE;
4763
4764 cmd->platform = bfd_get_32 (abfd, raw.platform);
4765 cmd->minos = bfd_get_32 (abfd, raw.minos);
4766 cmd->sdk = bfd_get_32 (abfd, raw.sdk);
4767 cmd->ntools = bfd_get_32 (abfd, raw.ntools);
4768 return TRUE;
4769}
4770
4771static bfd_boolean
4772bfd_mach_o_read_segment (bfd *abfd,
4773 bfd_mach_o_load_command *command,
4774 unsigned int wide)
4775{
4776 bfd_mach_o_segment_command *seg = &command->command.segment;
4777 unsigned long i;
4778
4779 if (wide)
4780 {
4781 struct mach_o_segment_command_64_external raw;
4782
4783 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64);
4784
4785 if (command->len < sizeof (raw) + 8)
4786 return FALSE;
4787 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4788 return FALSE;
4789
4790 memcpy (seg->segname, raw.segname, 16);
4791 seg->segname[16] = '\0';
4792
4793 seg->vmaddr = bfd_h_get_64 (abfd, raw.vmaddr);
4794 seg->vmsize = bfd_h_get_64 (abfd, raw.vmsize);
4795 seg->fileoff = bfd_h_get_64 (abfd, raw.fileoff);
4796 seg->filesize = bfd_h_get_64 (abfd, raw.filesize);
4797 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot);
4798 seg->initprot = bfd_h_get_32 (abfd, raw.initprot);
4799 seg->nsects = bfd_h_get_32 (abfd, raw.nsects);
4800 seg->flags = bfd_h_get_32 (abfd, raw.flags);
4801 }
4802 else
4803 {
4804 struct mach_o_segment_command_32_external raw;
4805
4806 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT);
4807
4808 if (command->len < sizeof (raw) + 8)
4809 return FALSE;
4810 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4811 return FALSE;
4812
4813 memcpy (seg->segname, raw.segname, 16);
4814 seg->segname[16] = '\0';
4815
4816 seg->vmaddr = bfd_h_get_32 (abfd, raw.vmaddr);
4817 seg->vmsize = bfd_h_get_32 (abfd, raw.vmsize);
4818 seg->fileoff = bfd_h_get_32 (abfd, raw.fileoff);
4819 seg->filesize = bfd_h_get_32 (abfd, raw.filesize);
4820 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot);
4821 seg->initprot = bfd_h_get_32 (abfd, raw.initprot);
4822 seg->nsects = bfd_h_get_32 (abfd, raw.nsects);
4823 seg->flags = bfd_h_get_32 (abfd, raw.flags);
4824 }
4825 seg->sect_head = NULL;
4826 seg->sect_tail = NULL;
4827
4828 for (i = 0; i < seg->nsects; i++)
4829 {
4830 asection *sec;
4831
4832 sec = bfd_mach_o_read_section (abfd, seg->initprot, wide);
4833 if (sec == NULL)
4834 return FALSE;
4835
4836 bfd_mach_o_append_section_to_segment
4837 (seg, bfd_mach_o_get_mach_o_section (sec));
4838 }
4839
4840 return TRUE;
4841}
4842
4843static bfd_boolean
4844bfd_mach_o_read_segment_32 (bfd *abfd, bfd_mach_o_load_command *command)
4845{
4846 return bfd_mach_o_read_segment (abfd, command, 0);
4847}
4848
4849static bfd_boolean
4850bfd_mach_o_read_segment_64 (bfd *abfd, bfd_mach_o_load_command *command)
4851{
4852 return bfd_mach_o_read_segment (abfd, command, 1);
4853}
4854
4855static bfd_boolean
4856bfd_mach_o_read_command (bfd *abfd, bfd_mach_o_load_command *command)
4857{
4858 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4859 struct mach_o_load_command_external raw;
4860 unsigned int cmd;
4861
4862 /* Read command type and length. */
4863 if (bfd_seek (abfd, mdata->hdr_offset + command->offset, SEEK_SET) != 0
4864 || bfd_bread (&raw, BFD_MACH_O_LC_SIZE, abfd) != BFD_MACH_O_LC_SIZE)
4865 return FALSE;
4866
4867 cmd = bfd_h_get_32 (abfd, raw.cmd);
4868 command->type = cmd & ~BFD_MACH_O_LC_REQ_DYLD;
4869 command->type_required = cmd & BFD_MACH_O_LC_REQ_DYLD ? TRUE : FALSE;
4870 command->len = bfd_h_get_32 (abfd, raw.cmdsize);
4871 if (command->len < 8 || command->len % 4 != 0)
4872 return FALSE;
4873
4874 switch (command->type)
4875 {
4876 case BFD_MACH_O_LC_SEGMENT:
4877 if (!bfd_mach_o_read_segment_32 (abfd, command))
4878 return FALSE;
4879 break;
4880 case BFD_MACH_O_LC_SEGMENT_64:
4881 if (!bfd_mach_o_read_segment_64 (abfd, command))
4882 return FALSE;
4883 break;
4884 case BFD_MACH_O_LC_SYMTAB:
4885 if (!bfd_mach_o_read_symtab (abfd, command))
4886 return FALSE;
4887 break;
4888 case BFD_MACH_O_LC_SYMSEG:
4889 break;
4890 case BFD_MACH_O_LC_THREAD:
4891 case BFD_MACH_O_LC_UNIXTHREAD:
4892 if (!bfd_mach_o_read_thread (abfd, command))
4893 return FALSE;
4894 break;
4895 case BFD_MACH_O_LC_LOAD_DYLINKER:
4896 case BFD_MACH_O_LC_ID_DYLINKER:
4897 case BFD_MACH_O_LC_DYLD_ENVIRONMENT:
4898 if (!bfd_mach_o_read_dylinker (abfd, command))
4899 return FALSE;
4900 break;
4901 case BFD_MACH_O_LC_LOAD_DYLIB:
4902 case BFD_MACH_O_LC_LAZY_LOAD_DYLIB:
4903 case BFD_MACH_O_LC_ID_DYLIB:
4904 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
4905 case BFD_MACH_O_LC_REEXPORT_DYLIB:
4906 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
4907 if (!bfd_mach_o_read_dylib (abfd, command))
4908 return FALSE;
4909 break;
4910 case BFD_MACH_O_LC_PREBOUND_DYLIB:
4911 if (!bfd_mach_o_read_prebound_dylib (abfd, command))
4912 return FALSE;
4913 break;
4914 case BFD_MACH_O_LC_LOADFVMLIB:
4915 case BFD_MACH_O_LC_IDFVMLIB:
4916 if (!bfd_mach_o_read_fvmlib (abfd, command))
4917 return FALSE;
4918 break;
4919 case BFD_MACH_O_LC_IDENT:
4920 case BFD_MACH_O_LC_FVMFILE:
4921 case BFD_MACH_O_LC_PREPAGE:
4922 case BFD_MACH_O_LC_ROUTINES:
4923 case BFD_MACH_O_LC_ROUTINES_64:
4924 break;
4925 case BFD_MACH_O_LC_SUB_FRAMEWORK:
4926 case BFD_MACH_O_LC_SUB_UMBRELLA:
4927 case BFD_MACH_O_LC_SUB_LIBRARY:
4928 case BFD_MACH_O_LC_SUB_CLIENT:
4929 case BFD_MACH_O_LC_RPATH:
4930 if (!bfd_mach_o_read_str (abfd, command))
4931 return FALSE;
4932 break;
4933 case BFD_MACH_O_LC_DYSYMTAB:
4934 if (!bfd_mach_o_read_dysymtab (abfd, command))
4935 return FALSE;
4936 break;
4937 case BFD_MACH_O_LC_PREBIND_CKSUM:
4938 if (!bfd_mach_o_read_prebind_cksum (abfd, command))
4939 return FALSE;
4940 break;
4941 case BFD_MACH_O_LC_TWOLEVEL_HINTS:
4942 if (!bfd_mach_o_read_twolevel_hints (abfd, command))
4943 return FALSE;
4944 break;
4945 case BFD_MACH_O_LC_UUID:
4946 if (!bfd_mach_o_read_uuid (abfd, command))
4947 return FALSE;
4948 break;
4949 case BFD_MACH_O_LC_CODE_SIGNATURE:
4950 case BFD_MACH_O_LC_SEGMENT_SPLIT_INFO:
4951 case BFD_MACH_O_LC_FUNCTION_STARTS:
4952 case BFD_MACH_O_LC_DATA_IN_CODE:
4953 case BFD_MACH_O_LC_DYLIB_CODE_SIGN_DRS:
4954 case BFD_MACH_O_LC_LINKER_OPTIMIZATION_HINT:
4955 if (!bfd_mach_o_read_linkedit (abfd, command))
4956 return FALSE;
4957 break;
4958 case BFD_MACH_O_LC_ENCRYPTION_INFO:
4959 if (!bfd_mach_o_read_encryption_info (abfd, command))
4960 return FALSE;
4961 break;
4962 case BFD_MACH_O_LC_ENCRYPTION_INFO_64:
4963 if (!bfd_mach_o_read_encryption_info_64 (abfd, command))
4964 return FALSE;
4965 break;
4966 case BFD_MACH_O_LC_DYLD_INFO:
4967 if (!bfd_mach_o_read_dyld_info (abfd, command))
4968 return FALSE;
4969 break;
4970 case BFD_MACH_O_LC_VERSION_MIN_MACOSX:
4971 case BFD_MACH_O_LC_VERSION_MIN_IPHONEOS:
4972 case BFD_MACH_O_LC_VERSION_MIN_WATCHOS:
4973 case BFD_MACH_O_LC_VERSION_MIN_TVOS:
4974 if (!bfd_mach_o_read_version_min (abfd, command))
4975 return FALSE;
4976 break;
4977 case BFD_MACH_O_LC_MAIN:
4978 if (!bfd_mach_o_read_main (abfd, command))
4979 return FALSE;
4980 break;
4981 case BFD_MACH_O_LC_SOURCE_VERSION:
4982 if (!bfd_mach_o_read_source_version (abfd, command))
4983 return FALSE;
4984 break;
4985 case BFD_MACH_O_LC_LINKER_OPTIONS:
4986 break;
4987 case BFD_MACH_O_LC_NOTE:
4988 if (!bfd_mach_o_read_note (abfd, command))
4989 return FALSE;
4990 break;
4991 case BFD_MACH_O_LC_BUILD_VERSION:
4992 if (!bfd_mach_o_read_build_version (abfd, command))
4993 return FALSE;
4994 break;
4995 default:
4996 command->len = 0;
4997 _bfd_error_handler (_("%pB: unknown load command %#x"),
4998 abfd, command->type);
4999 return FALSE;
5000 }
5001
5002 return TRUE;
5003}
5004
5005static bfd_boolean
5006bfd_mach_o_flatten_sections (bfd *abfd)
5007{
5008 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5009 bfd_mach_o_load_command *cmd;
5010 long csect = 0;
5011 size_t amt;
5012
5013 /* Count total number of sections. */
5014 mdata->nsects = 0;
5015
5016 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5017 {
5018 if (cmd->type == BFD_MACH_O_LC_SEGMENT
5019 || cmd->type == BFD_MACH_O_LC_SEGMENT_64)
5020 {
5021 bfd_mach_o_segment_command *seg = &cmd->command.segment;
5022
5023 mdata->nsects += seg->nsects;
5024 }
5025 }
5026
5027 /* Allocate sections array. */
5028 if (_bfd_mul_overflow (mdata->nsects, sizeof (bfd_mach_o_section *), &amt))
5029 {
5030 bfd_set_error (bfd_error_file_too_big);
5031 return FALSE;
5032 }
5033 mdata->sections = bfd_alloc (abfd, amt);
5034 if (mdata->sections == NULL && mdata->nsects != 0)
5035 return FALSE;
5036
5037 /* Fill the array. */
5038 csect = 0;
5039
5040 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5041 {
5042 if (cmd->type == BFD_MACH_O_LC_SEGMENT
5043 || cmd->type == BFD_MACH_O_LC_SEGMENT_64)
5044 {
5045 bfd_mach_o_segment_command *seg = &cmd->command.segment;
5046 bfd_mach_o_section *sec;
5047
5048 BFD_ASSERT (csect + seg->nsects <= mdata->nsects);
5049
5050 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
5051 mdata->sections[csect++] = sec;
5052 }
5053 }
5054 return TRUE;
5055}
5056
5057static bfd_boolean
5058bfd_mach_o_scan_start_address (bfd *abfd)
5059{
5060 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5061 bfd_mach_o_thread_command *thr = NULL;
5062 bfd_mach_o_load_command *cmd;
5063 unsigned long i;
5064
5065 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5066 if (cmd->type == BFD_MACH_O_LC_THREAD
5067 || cmd->type == BFD_MACH_O_LC_UNIXTHREAD)
5068 {
5069 thr = &cmd->command.thread;
5070 break;
5071 }
5072 else if (cmd->type == BFD_MACH_O_LC_MAIN && mdata->nsects > 1)
5073 {
5074 bfd_mach_o_main_command *main_cmd = &cmd->command.main;
5075 bfd_mach_o_section *text_sect = mdata->sections[0];
5076
5077 if (text_sect)
5078 {
5079 abfd->start_address = main_cmd->entryoff
5080 + (text_sect->addr - text_sect->offset);
5081 return TRUE;
5082 }
5083 }
5084
5085 /* An object file has no start address, so do not fail if not found. */
5086 if (thr == NULL)
5087 return TRUE;
5088
5089 /* FIXME: create a subtarget hook ? */
5090 for (i = 0; i < thr->nflavours; i++)
5091 {
5092 if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_I386)
5093 && (thr->flavours[i].flavour == BFD_MACH_O_x86_THREAD_STATE32))
5094 {
5095 unsigned char buf[4];
5096
5097 if (bfd_seek (abfd, thr->flavours[i].offset + 40, SEEK_SET) != 0
5098 || bfd_bread (buf, 4, abfd) != 4)
5099 return FALSE;
5100
5101 abfd->start_address = bfd_h_get_32 (abfd, buf);
5102 }
5103 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC)
5104 && (thr->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE))
5105 {
5106 unsigned char buf[4];
5107
5108 if (bfd_seek (abfd, thr->flavours[i].offset + 0, SEEK_SET) != 0
5109 || bfd_bread (buf, 4, abfd) != 4)
5110 return FALSE;
5111
5112 abfd->start_address = bfd_h_get_32 (abfd, buf);
5113 }
5114 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC_64)
5115 && (thr->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE64))
5116 {
5117 unsigned char buf[8];
5118
5119 if (bfd_seek (abfd, thr->flavours[i].offset + 0, SEEK_SET) != 0
5120 || bfd_bread (buf, 8, abfd) != 8)
5121 return FALSE;
5122
5123 abfd->start_address = bfd_h_get_64 (abfd, buf);
5124 }
5125 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_X86_64)
5126 && (thr->flavours[i].flavour == BFD_MACH_O_x86_THREAD_STATE64))
5127 {
5128 unsigned char buf[8];
5129
5130 if (bfd_seek (abfd, thr->flavours[i].offset + (16 * 8), SEEK_SET) != 0
5131 || bfd_bread (buf, 8, abfd) != 8)
5132 return FALSE;
5133
5134 abfd->start_address = bfd_h_get_64 (abfd, buf);
5135 }
5136 }
5137
5138 return TRUE;
5139}
5140
5141bfd_boolean
5142bfd_mach_o_set_arch_mach (bfd *abfd,
5143 enum bfd_architecture arch,
5144 unsigned long machine)
5145{
5146 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
5147
5148 /* If this isn't the right architecture for this backend, and this
5149 isn't the generic backend, fail. */
5150 if (arch != bed->arch
5151 && arch != bfd_arch_unknown
5152 && bed->arch != bfd_arch_unknown)
5153 return FALSE;
5154
5155 return bfd_default_set_arch_mach (abfd, arch, machine);
5156}
5157
5158static bfd_boolean
5159bfd_mach_o_scan (bfd *abfd,
5160 bfd_mach_o_header *header,
5161 bfd_mach_o_data_struct *mdata)
5162{
5163 unsigned int i;
5164 enum bfd_architecture cpu_type;
5165 unsigned long cpu_subtype;
5166 unsigned int hdrsize;
5167
5168 hdrsize = mach_o_wide_p (header) ?
5169 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
5170
5171 mdata->header = *header;
5172
5173 abfd->flags = abfd->flags & BFD_IN_MEMORY;
5174 switch (header->filetype)
5175 {
5176 case BFD_MACH_O_MH_OBJECT:
5177 abfd->flags |= HAS_RELOC;
5178 break;
5179 case BFD_MACH_O_MH_EXECUTE:
5180 abfd->flags |= EXEC_P;
5181 break;
5182 case BFD_MACH_O_MH_DYLIB:
5183 case BFD_MACH_O_MH_BUNDLE:
5184 abfd->flags |= DYNAMIC;
5185 break;
5186 }
5187
5188 abfd->tdata.mach_o_data = mdata;
5189
5190 bfd_mach_o_convert_architecture (header->cputype, header->cpusubtype,
5191 &cpu_type, &cpu_subtype);
5192 if (cpu_type == bfd_arch_unknown)
5193 {
5194 _bfd_error_handler
5195 /* xgettext:c-format */
5196 (_("bfd_mach_o_scan: unknown architecture 0x%lx/0x%lx"),
5197 header->cputype, header->cpusubtype);
5198 return FALSE;
5199 }
5200
5201 bfd_set_arch_mach (abfd, cpu_type, cpu_subtype);
5202
5203 if (header->ncmds != 0)
5204 {
5205 bfd_mach_o_load_command *cmd;
5206 size_t amt;
5207
5208 mdata->first_command = NULL;
5209 mdata->last_command = NULL;
5210
5211 if (_bfd_mul_overflow (header->ncmds,
5212 sizeof (bfd_mach_o_load_command), &amt))
5213 {
5214 bfd_set_error (bfd_error_file_too_big);
5215 return FALSE;
5216 }
5217 cmd = bfd_alloc (abfd, amt);
5218 if (cmd == NULL)
5219 return FALSE;
5220
5221 for (i = 0; i < header->ncmds; i++)
5222 {
5223 bfd_mach_o_load_command *cur = &cmd[i];
5224
5225 bfd_mach_o_append_command (abfd, cur);
5226
5227 if (i == 0)
5228 cur->offset = hdrsize;
5229 else
5230 {
5231 bfd_mach_o_load_command *prev = &cmd[i - 1];
5232 cur->offset = prev->offset + prev->len;
5233 }
5234
5235 if (!bfd_mach_o_read_command (abfd, cur))
5236 return FALSE;
5237 }
5238 }
5239
5240 /* Sections should be flatten before scanning start address. */
5241 if (!bfd_mach_o_flatten_sections (abfd))
5242 return FALSE;
5243 if (!bfd_mach_o_scan_start_address (abfd))
5244 return FALSE;
5245
5246 return TRUE;
5247}
5248
5249bfd_boolean
5250bfd_mach_o_mkobject_init (bfd *abfd)
5251{
5252 bfd_mach_o_data_struct *mdata = NULL;
5253
5254 mdata = bfd_zalloc (abfd, sizeof (bfd_mach_o_data_struct));
5255 if (mdata == NULL)
5256 return FALSE;
5257 abfd->tdata.mach_o_data = mdata;
5258
5259 mdata->header.magic = 0;
5260 mdata->header.cputype = 0;
5261 mdata->header.cpusubtype = 0;
5262 mdata->header.filetype = 0;
5263 mdata->header.ncmds = 0;
5264 mdata->header.sizeofcmds = 0;
5265 mdata->header.flags = 0;
5266 mdata->header.byteorder = BFD_ENDIAN_UNKNOWN;
5267 mdata->first_command = NULL;
5268 mdata->last_command = NULL;
5269 mdata->nsects = 0;
5270 mdata->sections = NULL;
5271 mdata->dyn_reloc_cache = NULL;
5272
5273 return TRUE;
5274}
5275
5276static bfd_boolean
5277bfd_mach_o_gen_mkobject (bfd *abfd)
5278{
5279 bfd_mach_o_data_struct *mdata;
5280
5281 if (!bfd_mach_o_mkobject_init (abfd))
5282 return FALSE;
5283
5284 mdata = bfd_mach_o_get_data (abfd);
5285 mdata->header.magic = BFD_MACH_O_MH_MAGIC;
5286 mdata->header.cputype = 0;
5287 mdata->header.cpusubtype = 0;
5288 mdata->header.byteorder = abfd->xvec->byteorder;
5289 mdata->header.version = 1;
5290
5291 return TRUE;
5292}
5293
5294const bfd_target *
5295bfd_mach_o_header_p (bfd *abfd,
5296 file_ptr hdr_off,
5297 bfd_mach_o_filetype file_type,
5298 bfd_mach_o_cpu_type cpu_type)
5299{
5300 bfd_mach_o_header header;
5301 bfd_mach_o_data_struct *mdata;
5302
5303 if (!bfd_mach_o_read_header (abfd, hdr_off, &header))
5304 goto wrong;
5305
5306 if (! (header.byteorder == BFD_ENDIAN_BIG
5307 || header.byteorder == BFD_ENDIAN_LITTLE))
5308 {
5309 _bfd_error_handler (_("unknown header byte-order value %#x"),
5310 header.byteorder);
5311 goto wrong;
5312 }
5313
5314 if (! ((header.byteorder == BFD_ENDIAN_BIG
5315 && abfd->xvec->byteorder == BFD_ENDIAN_BIG
5316 && abfd->xvec->header_byteorder == BFD_ENDIAN_BIG)
5317 || (header.byteorder == BFD_ENDIAN_LITTLE
5318 && abfd->xvec->byteorder == BFD_ENDIAN_LITTLE
5319 && abfd->xvec->header_byteorder == BFD_ENDIAN_LITTLE)))
5320 goto wrong;
5321
5322 /* Check cputype and filetype.
5323 In case of wildcard, do not accept magics that are handled by existing
5324 targets. */
5325 if (cpu_type)
5326 {
5327 if (header.cputype != cpu_type)
5328 goto wrong;
5329 }
5330 else
5331 {
5332#ifndef BFD64
5333 /* Do not recognize 64 architectures if not configured for 64bit targets.
5334 This could happen only for generic targets. */
5335 if (mach_o_wide_p (&header))
5336 goto wrong;
5337#endif
5338 }
5339
5340 if (file_type)
5341 {
5342 if (header.filetype != file_type)
5343 goto wrong;
5344 }
5345 else
5346 {
5347 switch (header.filetype)
5348 {
5349 case BFD_MACH_O_MH_CORE:
5350 /* Handled by core_p */
5351 goto wrong;
5352 default:
5353 break;
5354 }
5355 }
5356
5357 mdata = (bfd_mach_o_data_struct *) bfd_zalloc (abfd, sizeof (*mdata));
5358 if (mdata == NULL)
5359 goto fail;
5360 mdata->hdr_offset = hdr_off;
5361
5362 if (!bfd_mach_o_scan (abfd, &header, mdata))
5363 goto wrong;
5364
5365 return abfd->xvec;
5366
5367 wrong:
5368 bfd_set_error (bfd_error_wrong_format);
5369
5370 fail:
5371 return NULL;
5372}
5373
5374static const bfd_target *
5375bfd_mach_o_gen_object_p (bfd *abfd)
5376{
5377 return bfd_mach_o_header_p (abfd, 0, 0, 0);
5378}
5379
5380static const bfd_target *
5381bfd_mach_o_gen_core_p (bfd *abfd)
5382{
5383 return bfd_mach_o_header_p (abfd, 0, BFD_MACH_O_MH_CORE, 0);
5384}
5385
5386/* Return the base address of ABFD, ie the address at which the image is
5387 mapped. The possible initial pagezero is ignored. */
5388
5389bfd_vma
5390bfd_mach_o_get_base_address (bfd *abfd)
5391{
5392 bfd_mach_o_data_struct *mdata;
5393 bfd_mach_o_load_command *cmd;
5394
5395 /* Check for Mach-O. */
5396 if (!bfd_mach_o_valid (abfd))
5397 return 0;
5398 mdata = bfd_mach_o_get_data (abfd);
5399
5400 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5401 {
5402 if ((cmd->type == BFD_MACH_O_LC_SEGMENT
5403 || cmd->type == BFD_MACH_O_LC_SEGMENT_64))
5404 {
5405 struct bfd_mach_o_segment_command *segcmd = &cmd->command.segment;
5406
5407 if (segcmd->initprot != 0)
5408 return segcmd->vmaddr;
5409 }
5410 }
5411 return 0;
5412}
5413
5414typedef struct mach_o_fat_archentry
5415{
5416 unsigned long cputype;
5417 unsigned long cpusubtype;
5418 unsigned long offset;
5419 unsigned long size;
5420 unsigned long align;
5421} mach_o_fat_archentry;
5422
5423typedef struct mach_o_fat_data_struct
5424{
5425 unsigned long magic;
5426 unsigned long nfat_arch;
5427 mach_o_fat_archentry *archentries;
5428} mach_o_fat_data_struct;
5429
5430const bfd_target *
5431bfd_mach_o_fat_archive_p (bfd *abfd)
5432{
5433 mach_o_fat_data_struct *adata = NULL;
5434 struct mach_o_fat_header_external hdr;
5435 unsigned long i;
5436 size_t amt;
5437
5438 if (bfd_seek (abfd, 0, SEEK_SET) != 0
5439 || bfd_bread (&hdr, sizeof (hdr), abfd) != sizeof (hdr))
5440 goto error;
5441
5442 adata = bfd_alloc (abfd, sizeof (mach_o_fat_data_struct));
5443 if (adata == NULL)
5444 goto error;
5445
5446 adata->magic = bfd_getb32 (hdr.magic);
5447 adata->nfat_arch = bfd_getb32 (hdr.nfat_arch);
5448 if (adata->magic != 0xcafebabe)
5449 goto error;
5450 /* Avoid matching Java bytecode files, which have the same magic number.
5451 In the Java bytecode file format this field contains the JVM version,
5452 which starts at 43.0. */
5453 if (adata->nfat_arch > 30)
5454 goto error;
5455
5456 if (_bfd_mul_overflow (adata->nfat_arch,
5457 sizeof (mach_o_fat_archentry), &amt))
5458 {
5459 bfd_set_error (bfd_error_file_too_big);
5460 goto error;
5461 }
5462 adata->archentries = bfd_alloc (abfd, amt);
5463 if (adata->archentries == NULL)
5464 goto error;
5465
5466 for (i = 0; i < adata->nfat_arch; i++)
5467 {
5468 struct mach_o_fat_arch_external arch;
5469 if (bfd_bread (&arch, sizeof (arch), abfd) != sizeof (arch))
5470 goto error;
5471 adata->archentries[i].cputype = bfd_getb32 (arch.cputype);
5472 adata->archentries[i].cpusubtype = bfd_getb32 (arch.cpusubtype);
5473 adata->archentries[i].offset = bfd_getb32 (arch.offset);
5474 adata->archentries[i].size = bfd_getb32 (arch.size);
5475 adata->archentries[i].align = bfd_getb32 (arch.align);
5476 }
5477
5478 abfd->tdata.mach_o_fat_data = adata;
5479
5480 return abfd->xvec;
5481
5482 error:
5483 if (adata != NULL)
5484 bfd_release (abfd, adata);
5485 bfd_set_error (bfd_error_wrong_format);
5486 return NULL;
5487}
5488
5489/* Set the filename for a fat binary member ABFD, whose bfd architecture is
5490 ARCH_TYPE/ARCH_SUBTYPE and corresponding entry in header is ENTRY.
5491 Set arelt_data and origin fields too. */
5492
5493static bfd_boolean
5494bfd_mach_o_fat_member_init (bfd *abfd,
5495 enum bfd_architecture arch_type,
5496 unsigned long arch_subtype,
5497 mach_o_fat_archentry *entry)
5498{
5499 struct areltdata *areltdata;
5500 /* Create the member filename. Use ARCH_NAME. */
5501 const bfd_arch_info_type *ap = bfd_lookup_arch (arch_type, arch_subtype);
5502 char *filename;
5503
5504 if (ap)
5505 {
5506 /* Use the architecture name if known. */
5507 filename = bfd_strdup (ap->printable_name);
5508 if (filename == NULL)
5509 return FALSE;
5510 }
5511 else
5512 {
5513 /* Forge a uniq id. */
5514 const size_t namelen = 2 + 8 + 1 + 2 + 8 + 1;
5515 filename = bfd_malloc (namelen);
5516 if (filename == NULL)
5517 return FALSE;
5518 snprintf (filename, namelen, "0x%lx-0x%lx",
5519 entry->cputype, entry->cpusubtype);
5520 }
5521 bfd_set_filename (abfd, filename);
5522
5523 areltdata = bfd_zmalloc (sizeof (struct areltdata));
5524 if (areltdata == NULL)
5525 return FALSE;
5526 areltdata->parsed_size = entry->size;
5527 abfd->arelt_data = areltdata;
5528 abfd->iostream = NULL;
5529 abfd->origin = entry->offset;
5530 return TRUE;
5531}
5532
5533bfd *
5534bfd_mach_o_fat_openr_next_archived_file (bfd *archive, bfd *prev)
5535{
5536 mach_o_fat_data_struct *adata;
5537 mach_o_fat_archentry *entry = NULL;
5538 unsigned long i;
5539 bfd *nbfd;
5540 enum bfd_architecture arch_type;
5541 unsigned long arch_subtype;
5542
5543 adata = (mach_o_fat_data_struct *) archive->tdata.mach_o_fat_data;
5544 BFD_ASSERT (adata != NULL);
5545
5546 /* Find index of previous entry. */
5547 if (prev == NULL)
5548 {
5549 /* Start at first one. */
5550 i = 0;
5551 }
5552 else
5553 {
5554 /* Find index of PREV. */
5555 for (i = 0; i < adata->nfat_arch; i++)
5556 {
5557 if (adata->archentries[i].offset == prev->origin)
5558 break;
5559 }
5560
5561 if (i == adata->nfat_arch)
5562 {
5563 /* Not found. */
5564 bfd_set_error (bfd_error_bad_value);
5565 return NULL;
5566 }
5567
5568 /* Get next entry. */
5569 i++;
5570 }
5571
5572 if (i >= adata->nfat_arch)
5573 {
5574 bfd_set_error (bfd_error_no_more_archived_files);
5575 return NULL;
5576 }
5577
5578 entry = &adata->archentries[i];
5579 nbfd = _bfd_new_bfd_contained_in (archive);
5580 if (nbfd == NULL)
5581 return NULL;
5582
5583 bfd_mach_o_convert_architecture (entry->cputype, entry->cpusubtype,
5584 &arch_type, &arch_subtype);
5585
5586 if (!bfd_mach_o_fat_member_init (nbfd, arch_type, arch_subtype, entry))
5587 {
5588 bfd_close (nbfd);
5589 return NULL;
5590 }
5591
5592 bfd_set_arch_mach (nbfd, arch_type, arch_subtype);
5593
5594 return nbfd;
5595}
5596
5597/* Analogous to stat call. */
5598
5599static int
5600bfd_mach_o_fat_stat_arch_elt (bfd *abfd, struct stat *buf)
5601{
5602 if (abfd->arelt_data == NULL)
5603 {
5604 bfd_set_error (bfd_error_invalid_operation);
5605 return -1;
5606 }
5607
5608 buf->st_mtime = 0;
5609 buf->st_uid = 0;
5610 buf->st_gid = 0;
5611 buf->st_mode = 0644;
5612 buf->st_size = arelt_size (abfd);
5613
5614 return 0;
5615}
5616
5617/* If ABFD format is FORMAT and architecture is ARCH, return it.
5618 If ABFD is a fat image containing a member that corresponds to FORMAT
5619 and ARCH, returns it.
5620 In other case, returns NULL.
5621 This function allows transparent uses of fat images. */
5622
5623bfd *
5624bfd_mach_o_fat_extract (bfd *abfd,
5625 bfd_format format,
5626 const bfd_arch_info_type *arch)
5627{
5628 bfd *res;
5629 mach_o_fat_data_struct *adata;
5630 unsigned int i;
5631
5632 if (bfd_check_format (abfd, format))
5633 {
5634 if (bfd_get_arch_info (abfd) == arch)
5635 return abfd;
5636 return NULL;
5637 }
5638 if (!bfd_check_format (abfd, bfd_archive)
5639 || abfd->xvec != &mach_o_fat_vec)
5640 return NULL;
5641
5642 /* This is a Mach-O fat image. */
5643 adata = (mach_o_fat_data_struct *) abfd->tdata.mach_o_fat_data;
5644 BFD_ASSERT (adata != NULL);
5645
5646 for (i = 0; i < adata->nfat_arch; i++)
5647 {
5648 struct mach_o_fat_archentry *e = &adata->archentries[i];
5649 enum bfd_architecture cpu_type;
5650 unsigned long cpu_subtype;
5651
5652 bfd_mach_o_convert_architecture (e->cputype, e->cpusubtype,
5653 &cpu_type, &cpu_subtype);
5654 if (cpu_type != arch->arch || cpu_subtype != arch->mach)
5655 continue;
5656
5657 /* The architecture is found. */
5658 res = _bfd_new_bfd_contained_in (abfd);
5659 if (res == NULL)
5660 return NULL;
5661
5662 if (bfd_mach_o_fat_member_init (res, cpu_type, cpu_subtype, e)
5663 && bfd_check_format (res, format))
5664 {
5665 BFD_ASSERT (bfd_get_arch_info (res) == arch);
5666 return res;
5667 }
5668 bfd_close (res);
5669 return NULL;
5670 }
5671
5672 return NULL;
5673}
5674
5675static bfd_boolean
5676bfd_mach_o_fat_close_and_cleanup (bfd *abfd)
5677{
5678 _bfd_unlink_from_archive_parent (abfd);
5679 return TRUE;
5680}
5681
5682int
5683bfd_mach_o_lookup_command (bfd *abfd,
5684 bfd_mach_o_load_command_type type,
5685 bfd_mach_o_load_command **mcommand)
5686{
5687 struct mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5688 struct bfd_mach_o_load_command *cmd;
5689 unsigned int num;
5690
5691 BFD_ASSERT (mdata != NULL);
5692 BFD_ASSERT (mcommand != NULL);
5693
5694 num = 0;
5695 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5696 {
5697 if (cmd->type != type)
5698 continue;
5699
5700 if (num == 0)
5701 *mcommand = cmd;
5702 num++;
5703 }
5704
5705 return num;
5706}
5707
5708unsigned long
5709bfd_mach_o_stack_addr (enum bfd_mach_o_cpu_type type)
5710{
5711 switch (type)
5712 {
5713 case BFD_MACH_O_CPU_TYPE_MC680x0:
5714 return 0x04000000;
5715 case BFD_MACH_O_CPU_TYPE_POWERPC:
5716 return 0xc0000000;
5717 case BFD_MACH_O_CPU_TYPE_I386:
5718 return 0xc0000000;
5719 case BFD_MACH_O_CPU_TYPE_SPARC:
5720 return 0xf0000000;
5721 case BFD_MACH_O_CPU_TYPE_HPPA:
5722 return 0xc0000000 - 0x04000000;
5723 default:
5724 return 0;
5725 }
5726}
5727
5728/* The following two tables should be kept, as far as possible, in order of
5729 most frequently used entries to optimize their use from gas. */
5730
5731const bfd_mach_o_xlat_name bfd_mach_o_section_type_name[] =
5732{
5733 { "regular", BFD_MACH_O_S_REGULAR},
5734 { "coalesced", BFD_MACH_O_S_COALESCED},
5735 { "zerofill", BFD_MACH_O_S_ZEROFILL},
5736 { "cstring_literals", BFD_MACH_O_S_CSTRING_LITERALS},
5737 { "4byte_literals", BFD_MACH_O_S_4BYTE_LITERALS},
5738 { "8byte_literals", BFD_MACH_O_S_8BYTE_LITERALS},
5739 { "16byte_literals", BFD_MACH_O_S_16BYTE_LITERALS},
5740 { "literal_pointers", BFD_MACH_O_S_LITERAL_POINTERS},
5741 { "mod_init_func_pointers", BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS},
5742 { "mod_fini_func_pointers", BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS},
5743 { "gb_zerofill", BFD_MACH_O_S_GB_ZEROFILL},
5744 { "interposing", BFD_MACH_O_S_INTERPOSING},
5745 { "dtrace_dof", BFD_MACH_O_S_DTRACE_DOF},
5746 { "non_lazy_symbol_pointers", BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS},
5747 { "lazy_symbol_pointers", BFD_MACH_O_S_LAZY_SYMBOL_POINTERS},
5748 { "symbol_stubs", BFD_MACH_O_S_SYMBOL_STUBS},
5749 { "lazy_dylib_symbol_pointers", BFD_MACH_O_S_LAZY_DYLIB_SYMBOL_POINTERS},
5750 { NULL, 0}
5751};
5752
5753const bfd_mach_o_xlat_name bfd_mach_o_section_attribute_name[] =
5754{
5755 { "pure_instructions", BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS },
5756 { "some_instructions", BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS },
5757 { "loc_reloc", BFD_MACH_O_S_ATTR_LOC_RELOC },
5758 { "ext_reloc", BFD_MACH_O_S_ATTR_EXT_RELOC },
5759 { "debug", BFD_MACH_O_S_ATTR_DEBUG },
5760 { "live_support", BFD_MACH_O_S_ATTR_LIVE_SUPPORT },
5761 { "no_dead_strip", BFD_MACH_O_S_ATTR_NO_DEAD_STRIP },
5762 { "strip_static_syms", BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS },
5763 { "no_toc", BFD_MACH_O_S_ATTR_NO_TOC },
5764 { "self_modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
5765 { "modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
5766 { NULL, 0}
5767};
5768
5769/* Get the section type from NAME. Return 256 if NAME is unknown. */
5770
5771unsigned int
5772bfd_mach_o_get_section_type_from_name (bfd *abfd, const char *name)
5773{
5774 const bfd_mach_o_xlat_name *x;
5775 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
5776
5777 for (x = bfd_mach_o_section_type_name; x->name; x++)
5778 if (strcmp (x->name, name) == 0)
5779 {
5780 /* We found it... does the target support it? */
5781 if (bed->bfd_mach_o_section_type_valid_for_target == NULL
5782 || bed->bfd_mach_o_section_type_valid_for_target (x->val))
5783 return x->val; /* OK. */
5784 else
5785 break; /* Not supported. */
5786 }
5787 /* Maximum section ID = 0xff. */
5788 return 256;
5789}
5790
5791/* Get the section attribute from NAME. Return -1 if NAME is unknown. */
5792
5793unsigned int
5794bfd_mach_o_get_section_attribute_from_name (const char *name)
5795{
5796 const bfd_mach_o_xlat_name *x;
5797
5798 for (x = bfd_mach_o_section_attribute_name; x->name; x++)
5799 if (strcmp (x->name, name) == 0)
5800 return x->val;
5801 return (unsigned int)-1;
5802}
5803
5804int
5805bfd_mach_o_core_fetch_environment (bfd *abfd,
5806 unsigned char **rbuf,
5807 unsigned int *rlen)
5808{
5809 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5810 unsigned long stackaddr = bfd_mach_o_stack_addr (mdata->header.cputype);
5811 bfd_mach_o_load_command *cmd;
5812
5813 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5814 {
5815 bfd_mach_o_segment_command *seg;
5816
5817 if (cmd->type != BFD_MACH_O_LC_SEGMENT)
5818 continue;
5819
5820 seg = &cmd->command.segment;
5821
5822 if ((seg->vmaddr + seg->vmsize) == stackaddr)
5823 {
5824 unsigned long start = seg->fileoff;
5825 unsigned long end = seg->fileoff + seg->filesize;
5826 unsigned char *buf = bfd_malloc (1024);
5827 unsigned long size = 1024;
5828
5829 if (buf == NULL)
5830 return -1;
5831 for (;;)
5832 {
5833 bfd_size_type nread = 0;
5834 unsigned long offset;
5835 int found_nonnull = 0;
5836
5837 if (size > (end - start))
5838 size = (end - start);
5839
5840 buf = bfd_realloc_or_free (buf, size);
5841 if (buf == NULL)
5842 return -1;
5843
5844 if (bfd_seek (abfd, end - size, SEEK_SET) != 0)
5845 {
5846 free (buf);
5847 return -1;
5848 }
5849
5850 nread = bfd_bread (buf, size, abfd);
5851
5852 if (nread != size)
5853 {
5854 free (buf);
5855 return -1;
5856 }
5857
5858 for (offset = 4; offset <= size; offset += 4)
5859 {
5860 unsigned long val;
5861
5862 val = *((unsigned long *) (buf + size - offset));
5863 if (! found_nonnull)
5864 {
5865 if (val != 0)
5866 found_nonnull = 1;
5867 }
5868 else if (val == 0x0)
5869 {
5870 unsigned long bottom;
5871 unsigned long top;
5872
5873 bottom = seg->fileoff + seg->filesize - offset;
5874 top = seg->fileoff + seg->filesize - 4;
5875 *rbuf = bfd_malloc (top - bottom);
5876 if (*rbuf == NULL)
5877 return -1;
5878 *rlen = top - bottom;
5879
5880 memcpy (*rbuf, buf + size - *rlen, *rlen);
5881 free (buf);
5882 return 0;
5883 }
5884 }
5885
5886 if (size == (end - start))
5887 break;
5888
5889 size *= 2;
5890 }
5891
5892 free (buf);
5893 }
5894 }
5895
5896 return -1;
5897}
5898
5899char *
5900bfd_mach_o_core_file_failing_command (bfd *abfd)
5901{
5902 unsigned char *buf = NULL;
5903 unsigned int len = 0;
5904 int ret;
5905
5906 ret = bfd_mach_o_core_fetch_environment (abfd, &buf, &len);
5907 if (ret < 0)
5908 return NULL;
5909
5910 return (char *) buf;
5911}
5912
5913int
5914bfd_mach_o_core_file_failing_signal (bfd *abfd ATTRIBUTE_UNUSED)
5915{
5916 return 0;
5917}
5918
5919static bfd_mach_o_uuid_command *
5920bfd_mach_o_lookup_uuid_command (bfd *abfd)
5921{
5922 bfd_mach_o_load_command *uuid_cmd = NULL;
5923 int ncmd = bfd_mach_o_lookup_command (abfd, BFD_MACH_O_LC_UUID, &uuid_cmd);
5924 if (ncmd != 1 || uuid_cmd == NULL)
5925 return FALSE;
5926 return &uuid_cmd->command.uuid;
5927}
5928
5929/* Return true if ABFD is a dSYM file and its UUID matches UUID_CMD. */
5930
5931static bfd_boolean
5932bfd_mach_o_dsym_for_uuid_p (bfd *abfd, const bfd_mach_o_uuid_command *uuid_cmd)
5933{
5934 bfd_mach_o_uuid_command *dsym_uuid_cmd;
5935
5936 BFD_ASSERT (abfd);
5937 BFD_ASSERT (uuid_cmd);
5938
5939 if (!bfd_check_format (abfd, bfd_object))
5940 return FALSE;
5941
5942 if (bfd_get_flavour (abfd) != bfd_target_mach_o_flavour
5943 || bfd_mach_o_get_data (abfd) == NULL
5944 || bfd_mach_o_get_data (abfd)->header.filetype != BFD_MACH_O_MH_DSYM)
5945 return FALSE;
5946
5947 dsym_uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd);
5948 if (dsym_uuid_cmd == NULL)
5949 return FALSE;
5950
5951 if (memcmp (uuid_cmd->uuid, dsym_uuid_cmd->uuid,
5952 sizeof (uuid_cmd->uuid)) != 0)
5953 return FALSE;
5954
5955 return TRUE;
5956}
5957
5958/* Find a BFD in DSYM_FILENAME which matches ARCH and UUID_CMD.
5959 The caller is responsible for closing the returned BFD object and
5960 its my_archive if the returned BFD is in a fat dSYM. */
5961
5962static bfd *
5963bfd_mach_o_find_dsym (const char *dsym_filename,
5964 const bfd_mach_o_uuid_command *uuid_cmd,
5965 const bfd_arch_info_type *arch)
5966{
5967 bfd *base_dsym_bfd, *dsym_bfd;
5968
5969 BFD_ASSERT (uuid_cmd);
5970
5971 base_dsym_bfd = bfd_openr (dsym_filename, NULL);
5972 if (base_dsym_bfd == NULL)
5973 return NULL;
5974
5975 dsym_bfd = bfd_mach_o_fat_extract (base_dsym_bfd, bfd_object, arch);
5976 if (bfd_mach_o_dsym_for_uuid_p (dsym_bfd, uuid_cmd))
5977 return dsym_bfd;
5978
5979 bfd_close (dsym_bfd);
5980 if (base_dsym_bfd != dsym_bfd)
5981 bfd_close (base_dsym_bfd);
5982
5983 return NULL;
5984}
5985
5986/* Return a BFD created from a dSYM file for ABFD.
5987 The caller is responsible for closing the returned BFD object, its
5988 filename, and its my_archive if the returned BFD is in a fat dSYM. */
5989
5990static bfd *
5991bfd_mach_o_follow_dsym (bfd *abfd)
5992{
5993 char *dsym_filename;
5994 bfd_mach_o_uuid_command *uuid_cmd;
5995 bfd *dsym_bfd, *base_bfd = abfd;
5996 const char *base_basename;
5997
5998 if (abfd == NULL || bfd_get_flavour (abfd) != bfd_target_mach_o_flavour)
5999 return NULL;
6000
6001 if (abfd->my_archive && !bfd_is_thin_archive (abfd->my_archive))
6002 base_bfd = abfd->my_archive;
6003 /* BFD may have been opened from a stream. */
6004 if (base_bfd->filename == NULL)
6005 {
6006 bfd_set_error (bfd_error_invalid_operation);
6007 return NULL;
6008 }
6009 base_basename = lbasename (base_bfd->filename);
6010
6011 uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd);
6012 if (uuid_cmd == NULL)
6013 return NULL;
6014
6015 /* TODO: We assume the DWARF file has the same as the binary's.
6016 It seems apple's GDB checks all files in the dSYM bundle directory.
6017 http://opensource.apple.com/source/gdb/gdb-1708/src/gdb/macosx/macosx-tdep.c
6018 */
6019 dsym_filename = (char *)bfd_malloc (strlen (base_bfd->filename)
6020 + strlen (dsym_subdir) + 1
6021 + strlen (base_basename) + 1);
6022 if (dsym_filename == NULL)
6023 return NULL;
6024
6025 sprintf (dsym_filename, "%s%s/%s",
6026 base_bfd->filename, dsym_subdir, base_basename);
6027
6028 dsym_bfd = bfd_mach_o_find_dsym (dsym_filename, uuid_cmd,
6029 bfd_get_arch_info (abfd));
6030 if (dsym_bfd == NULL)
6031 free (dsym_filename);
6032
6033 return dsym_bfd;
6034}
6035
6036bfd_boolean
6037bfd_mach_o_find_nearest_line (bfd *abfd,
6038 asymbol **symbols,
6039 asection *section,
6040 bfd_vma offset,
6041 const char **filename_ptr,
6042 const char **functionname_ptr,
6043 unsigned int *line_ptr,
6044 unsigned int *discriminator_ptr)
6045{
6046 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
6047 if (mdata == NULL)
6048 return FALSE;
6049 switch (mdata->header.filetype)
6050 {
6051 case BFD_MACH_O_MH_OBJECT:
6052 break;
6053 case BFD_MACH_O_MH_EXECUTE:
6054 case BFD_MACH_O_MH_DYLIB:
6055 case BFD_MACH_O_MH_BUNDLE:
6056 case BFD_MACH_O_MH_KEXT_BUNDLE:
6057 if (mdata->dwarf2_find_line_info == NULL)
6058 {
6059 mdata->dsym_bfd = bfd_mach_o_follow_dsym (abfd);
6060 /* When we couldn't find dSYM for this binary, we look for
6061 the debug information in the binary itself. In this way,
6062 we won't try finding separated dSYM again because
6063 mdata->dwarf2_find_line_info will be filled. */
6064 if (! mdata->dsym_bfd)
6065 break;
6066 if (! _bfd_dwarf2_slurp_debug_info (abfd, mdata->dsym_bfd,
6067 dwarf_debug_sections, symbols,
6068 &mdata->dwarf2_find_line_info,
6069 FALSE))
6070 return FALSE;
6071 }
6072 break;
6073 default:
6074 return FALSE;
6075 }
6076 return _bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset,
6077 filename_ptr, functionname_ptr,
6078 line_ptr, discriminator_ptr,
6079 dwarf_debug_sections,
6080 &mdata->dwarf2_find_line_info);
6081}
6082
6083bfd_boolean
6084bfd_mach_o_close_and_cleanup (bfd *abfd)
6085{
6086 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
6087 if (bfd_get_format (abfd) == bfd_object && mdata != NULL)
6088 {
6089 _bfd_dwarf2_cleanup_debug_info (abfd, &mdata->dwarf2_find_line_info);
6090 bfd_mach_o_free_cached_info (abfd);
6091 if (mdata->dsym_bfd != NULL)
6092 {
6093 bfd *fat_bfd = mdata->dsym_bfd->my_archive;
6094#if 0
6095 /* FIXME: PR 19435: This calculation to find the memory allocated by
6096 bfd_mach_o_follow_dsym for the filename does not always end up
6097 selecting the correct pointer. Unfortunately this problem is
6098 very hard to reproduce on a non Mach-O native system, so until it
6099 can be traced and fixed on such a system, this code will remain
6100 commented out. This does mean that there will be a memory leak,
6101 but it is small, and happens when we are closing down, so it
6102 should not matter too much. */
6103 char *dsym_filename = (char *)(fat_bfd
6104 ? fat_bfd->filename
6105 : mdata->dsym_bfd->filename);
6106#endif
6107 bfd_close (mdata->dsym_bfd);
6108 mdata->dsym_bfd = NULL;
6109 if (fat_bfd)
6110 bfd_close (fat_bfd);
6111#if 0
6112 free (dsym_filename);
6113#endif
6114 }
6115 }
6116
6117 return _bfd_generic_close_and_cleanup (abfd);
6118}
6119
6120bfd_boolean
6121bfd_mach_o_free_cached_info (bfd *abfd)
6122{
6123 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
6124 asection *asect;
6125 free (mdata->dyn_reloc_cache);
6126 mdata->dyn_reloc_cache = NULL;
6127 for (asect = abfd->sections; asect != NULL; asect = asect->next)
6128 {
6129 free (asect->relocation);
6130 asect->relocation = NULL;
6131 }
6132
6133 return TRUE;
6134}
6135
6136#define bfd_mach_o_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
6137#define bfd_mach_o_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_lookup
6138
6139#define bfd_mach_o_canonicalize_one_reloc NULL
6140#define bfd_mach_o_swap_reloc_out NULL
6141#define bfd_mach_o_print_thread NULL
6142#define bfd_mach_o_tgt_seg_table NULL
6143#define bfd_mach_o_section_type_valid_for_tgt NULL
6144
6145#define TARGET_NAME mach_o_be_vec
6146#define TARGET_STRING "mach-o-be"
6147#define TARGET_ARCHITECTURE bfd_arch_unknown
6148#define TARGET_PAGESIZE 1
6149#define TARGET_BIG_ENDIAN 1
6150#define TARGET_ARCHIVE 0
6151#define TARGET_PRIORITY 1
6152#include "mach-o-target.c"
6153
6154#undef TARGET_NAME
6155#undef TARGET_STRING
6156#undef TARGET_ARCHITECTURE
6157#undef TARGET_PAGESIZE
6158#undef TARGET_BIG_ENDIAN
6159#undef TARGET_ARCHIVE
6160#undef TARGET_PRIORITY
6161
6162#define TARGET_NAME mach_o_le_vec
6163#define TARGET_STRING "mach-o-le"
6164#define TARGET_ARCHITECTURE bfd_arch_unknown
6165#define TARGET_PAGESIZE 1
6166#define TARGET_BIG_ENDIAN 0
6167#define TARGET_ARCHIVE 0
6168#define TARGET_PRIORITY 1
6169
6170#include "mach-o-target.c"
6171
6172#undef TARGET_NAME
6173#undef TARGET_STRING
6174#undef TARGET_ARCHITECTURE
6175#undef TARGET_PAGESIZE
6176#undef TARGET_BIG_ENDIAN
6177#undef TARGET_ARCHIVE
6178#undef TARGET_PRIORITY
6179
6180/* Not yet handled: creating an archive. */
6181#define bfd_mach_o_mkarchive _bfd_noarchive_mkarchive
6182
6183#define bfd_mach_o_close_and_cleanup bfd_mach_o_fat_close_and_cleanup
6184
6185/* Not used. */
6186#define bfd_mach_o_generic_stat_arch_elt bfd_mach_o_fat_stat_arch_elt
6187#define bfd_mach_o_openr_next_archived_file bfd_mach_o_fat_openr_next_archived_file
6188#define bfd_mach_o_archive_p bfd_mach_o_fat_archive_p
6189
6190#define TARGET_NAME mach_o_fat_vec
6191#define TARGET_STRING "mach-o-fat"
6192#define TARGET_ARCHITECTURE bfd_arch_unknown
6193#define TARGET_PAGESIZE 1
6194#define TARGET_BIG_ENDIAN 1
6195#define TARGET_ARCHIVE 1
6196#define TARGET_PRIORITY 0
6197
6198#include "mach-o-target.c"
6199
6200#undef TARGET_NAME
6201#undef TARGET_STRING
6202#undef TARGET_ARCHITECTURE
6203#undef TARGET_PAGESIZE
6204#undef TARGET_BIG_ENDIAN
6205#undef TARGET_ARCHIVE
6206#undef TARGET_PRIORITY
GDB Binutils - Deliverables
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