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[deliverable/binutils-gdb.git] / bfd / mach-o.c
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
41 static bfd_boolean
42 bfd_mach_o_read_dyld_content (bfd *abfd, bfd_mach_o_dyld_info_command *cmd);
43
44 unsigned int
45 bfd_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
55 bfd_boolean
56 bfd_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
69 static INLINE bfd_boolean
70 mach_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
84 static INLINE bfd_boolean
85 bfd_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. */
95 static 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. */
134 static 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. */
164 static 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. */
209 static 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
278 static 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
287 static 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
298 const mach_o_section_name_xlat *
299 bfd_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
330 const mach_o_section_name_xlat *
331 bfd_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
375 void
376 bfd_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
434 static const mach_o_section_name_xlat *
435 bfd_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
504 unsigned int
505 bfd_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
524 unsigned int
525 bfd_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
538 static void
539 bfd_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
554 bfd_boolean
555 bfd_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
575 bfd_boolean
576 bfd_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
596 static const char *
597 cputype (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
620 static const char *
621 cpusubtype (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
693 bfd_boolean
694 bfd_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
717 bfd_boolean
718 bfd_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
860 bfd_boolean
861 bfd_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
874 static long
875 bfd_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
884 long
885 bfd_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
892 long
893 bfd_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
929 long
930 bfd_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
1057 void
1058 bfd_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
1065 void
1066 bfd_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
1120 static void
1121 bfd_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
1205 static int
1206 bfd_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
1224 static int
1225 bfd_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
1243 static bfd_boolean
1244 bfd_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
1270 static bfd_boolean
1271 bfd_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
1301 static bfd_boolean
1302 bfd_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
1324 static bfd_boolean
1325 bfd_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
1350 static bfd_boolean
1351 bfd_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
1366 static bfd_boolean
1367 bfd_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
1420 long
1421 bfd_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
1437 void
1438 bfd_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
1465 bfd_boolean
1466 bfd_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 (_("\
1506 malformed 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
1539 bfd_boolean
1540 bfd_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
1609 static int
1610 bfd_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 native_relocs =
1627 (struct mach_o_reloc_info_external *) bfd_malloc (native_size);
1628 if (native_relocs == NULL)
1629 return -1;
1630
1631 if (bfd_seek (abfd, filepos, SEEK_SET) != 0
1632 || bfd_bread (native_relocs, native_size, abfd) != native_size)
1633 goto err;
1634
1635 for (i = 0; i < count; i++)
1636 {
1637 if (!(*bed->_bfd_mach_o_canonicalize_one_reloc)(abfd, &native_relocs[i],
1638 &res[i], syms, res))
1639 goto err;
1640 }
1641 free (native_relocs);
1642 return i;
1643
1644 err:
1645 free (native_relocs);
1646 if (bfd_get_error () == bfd_error_no_error)
1647 bfd_set_error (bfd_error_invalid_operation);
1648 return -1;
1649 }
1650
1651 long
1652 bfd_mach_o_canonicalize_reloc (bfd *abfd, asection *asect,
1653 arelent **rels, asymbol **syms)
1654 {
1655 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1656 unsigned long i;
1657 arelent *res;
1658
1659 if (asect->reloc_count == 0)
1660 return 0;
1661
1662 /* No need to go further if we don't know how to read relocs. */
1663 if (bed->_bfd_mach_o_canonicalize_one_reloc == NULL)
1664 return 0;
1665
1666 if (asect->relocation == NULL)
1667 {
1668 if (asect->reloc_count * sizeof (arelent) < asect->reloc_count)
1669 return -1;
1670 res = bfd_malloc (asect->reloc_count * sizeof (arelent));
1671 if (res == NULL)
1672 return -1;
1673
1674 if (bfd_mach_o_canonicalize_relocs (abfd, asect->rel_filepos,
1675 asect->reloc_count, res, syms) < 0)
1676 {
1677 free (res);
1678 return -1;
1679 }
1680 asect->relocation = res;
1681 }
1682
1683 res = asect->relocation;
1684 for (i = 0; i < asect->reloc_count; i++)
1685 rels[i] = &res[i];
1686 rels[i] = NULL;
1687
1688 return i;
1689 }
1690
1691 long
1692 bfd_mach_o_get_dynamic_reloc_upper_bound (bfd *abfd)
1693 {
1694 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1695
1696 if (mdata->dysymtab == NULL)
1697 return 1;
1698 return (mdata->dysymtab->nextrel + mdata->dysymtab->nlocrel + 1)
1699 * sizeof (arelent *);
1700 }
1701
1702 long
1703 bfd_mach_o_canonicalize_dynamic_reloc (bfd *abfd, arelent **rels,
1704 struct bfd_symbol **syms)
1705 {
1706 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1707 bfd_mach_o_dysymtab_command *dysymtab = mdata->dysymtab;
1708 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1709 unsigned long i;
1710 arelent *res;
1711
1712 if (dysymtab == NULL)
1713 return 0;
1714 if (dysymtab->nextrel == 0 && dysymtab->nlocrel == 0)
1715 return 0;
1716
1717 /* No need to go further if we don't know how to read relocs. */
1718 if (bed->_bfd_mach_o_canonicalize_one_reloc == NULL)
1719 return 0;
1720
1721 if (mdata->dyn_reloc_cache == NULL)
1722 {
1723 if ((dysymtab->nextrel + dysymtab->nlocrel) * sizeof (arelent)
1724 < (dysymtab->nextrel + dysymtab->nlocrel))
1725 return -1;
1726
1727 res = bfd_malloc ((dysymtab->nextrel + dysymtab->nlocrel)
1728 * sizeof (arelent));
1729 if (res == NULL)
1730 return -1;
1731
1732 if (bfd_mach_o_canonicalize_relocs (abfd, dysymtab->extreloff,
1733 dysymtab->nextrel, res, syms) < 0)
1734 {
1735 free (res);
1736 return -1;
1737 }
1738
1739 if (bfd_mach_o_canonicalize_relocs (abfd, dysymtab->locreloff,
1740 dysymtab->nlocrel,
1741 res + dysymtab->nextrel, syms) < 0)
1742 {
1743 free (res);
1744 return -1;
1745 }
1746
1747 mdata->dyn_reloc_cache = res;
1748 }
1749
1750 res = mdata->dyn_reloc_cache;
1751 for (i = 0; i < dysymtab->nextrel + dysymtab->nlocrel; i++)
1752 rels[i] = &res[i];
1753 rels[i] = NULL;
1754 return i;
1755 }
1756
1757 /* In addition to the need to byte-swap the symbol number, the bit positions
1758 of the fields in the relocation information vary per target endian-ness. */
1759
1760 static void
1761 bfd_mach_o_swap_out_non_scattered_reloc (bfd *abfd, unsigned char *fields,
1762 bfd_mach_o_reloc_info *rel)
1763 {
1764 unsigned char info = 0;
1765
1766 BFD_ASSERT (rel->r_type <= 15);
1767 BFD_ASSERT (rel->r_length <= 3);
1768
1769 if (bfd_big_endian (abfd))
1770 {
1771 fields[0] = (rel->r_value >> 16) & 0xff;
1772 fields[1] = (rel->r_value >> 8) & 0xff;
1773 fields[2] = rel->r_value & 0xff;
1774 info |= rel->r_type << BFD_MACH_O_BE_TYPE_SHIFT;
1775 info |= rel->r_pcrel ? BFD_MACH_O_BE_PCREL : 0;
1776 info |= rel->r_length << BFD_MACH_O_BE_LENGTH_SHIFT;
1777 info |= rel->r_extern ? BFD_MACH_O_BE_EXTERN : 0;
1778 }
1779 else
1780 {
1781 fields[2] = (rel->r_value >> 16) & 0xff;
1782 fields[1] = (rel->r_value >> 8) & 0xff;
1783 fields[0] = rel->r_value & 0xff;
1784 info |= rel->r_type << BFD_MACH_O_LE_TYPE_SHIFT;
1785 info |= rel->r_pcrel ? BFD_MACH_O_LE_PCREL : 0;
1786 info |= rel->r_length << BFD_MACH_O_LE_LENGTH_SHIFT;
1787 info |= rel->r_extern ? BFD_MACH_O_LE_EXTERN : 0;
1788 }
1789 fields[3] = info;
1790 }
1791
1792 static bfd_boolean
1793 bfd_mach_o_write_relocs (bfd *abfd, bfd_mach_o_section *section)
1794 {
1795 unsigned int i;
1796 arelent **entries;
1797 asection *sec;
1798 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1799
1800 sec = section->bfdsection;
1801 if (sec->reloc_count == 0)
1802 return TRUE;
1803
1804 if (bed->_bfd_mach_o_swap_reloc_out == NULL)
1805 return TRUE;
1806
1807 if (bfd_seek (abfd, section->reloff, SEEK_SET) != 0)
1808 return FALSE;
1809
1810 /* Convert and write. */
1811 entries = section->bfdsection->orelocation;
1812 for (i = 0; i < section->nreloc; i++)
1813 {
1814 arelent *rel = entries[i];
1815 struct mach_o_reloc_info_external raw;
1816 bfd_mach_o_reloc_info info, *pinfo = &info;
1817
1818 /* Convert relocation to an intermediate representation. */
1819 if (!(*bed->_bfd_mach_o_swap_reloc_out) (rel, pinfo))
1820 return FALSE;
1821
1822 /* Lower the relocation info. */
1823 if (pinfo->r_scattered)
1824 {
1825 unsigned long v;
1826
1827 v = BFD_MACH_O_SR_SCATTERED
1828 | (pinfo->r_pcrel ? BFD_MACH_O_SR_PCREL : 0)
1829 | BFD_MACH_O_SET_SR_LENGTH (pinfo->r_length)
1830 | BFD_MACH_O_SET_SR_TYPE (pinfo->r_type)
1831 | BFD_MACH_O_SET_SR_ADDRESS (pinfo->r_address);
1832 /* Note: scattered relocs have field in reverse order... */
1833 bfd_put_32 (abfd, v, raw.r_address);
1834 bfd_put_32 (abfd, pinfo->r_value, raw.r_symbolnum);
1835 }
1836 else
1837 {
1838 bfd_put_32 (abfd, pinfo->r_address, raw.r_address);
1839 bfd_mach_o_swap_out_non_scattered_reloc (abfd, raw.r_symbolnum,
1840 pinfo);
1841 }
1842
1843 if (bfd_bwrite (&raw, BFD_MACH_O_RELENT_SIZE, abfd)
1844 != BFD_MACH_O_RELENT_SIZE)
1845 return FALSE;
1846 }
1847 return TRUE;
1848 }
1849
1850 static bfd_boolean
1851 bfd_mach_o_write_section_32 (bfd *abfd, bfd_mach_o_section *section)
1852 {
1853 struct mach_o_section_32_external raw;
1854
1855 memcpy (raw.sectname, section->sectname, 16);
1856 memcpy (raw.segname, section->segname, 16);
1857 bfd_h_put_32 (abfd, section->addr, raw.addr);
1858 bfd_h_put_32 (abfd, section->size, raw.size);
1859 bfd_h_put_32 (abfd, section->offset, raw.offset);
1860 bfd_h_put_32 (abfd, section->align, raw.align);
1861 bfd_h_put_32 (abfd, section->reloff, raw.reloff);
1862 bfd_h_put_32 (abfd, section->nreloc, raw.nreloc);
1863 bfd_h_put_32 (abfd, section->flags, raw.flags);
1864 bfd_h_put_32 (abfd, section->reserved1, raw.reserved1);
1865 bfd_h_put_32 (abfd, section->reserved2, raw.reserved2);
1866
1867 if (bfd_bwrite (&raw, BFD_MACH_O_SECTION_SIZE, abfd)
1868 != BFD_MACH_O_SECTION_SIZE)
1869 return FALSE;
1870
1871 return TRUE;
1872 }
1873
1874 static bfd_boolean
1875 bfd_mach_o_write_section_64 (bfd *abfd, bfd_mach_o_section *section)
1876 {
1877 struct mach_o_section_64_external raw;
1878
1879 memcpy (raw.sectname, section->sectname, 16);
1880 memcpy (raw.segname, section->segname, 16);
1881 bfd_h_put_64 (abfd, section->addr, raw.addr);
1882 bfd_h_put_64 (abfd, section->size, raw.size);
1883 bfd_h_put_32 (abfd, section->offset, raw.offset);
1884 bfd_h_put_32 (abfd, section->align, raw.align);
1885 bfd_h_put_32 (abfd, section->reloff, raw.reloff);
1886 bfd_h_put_32 (abfd, section->nreloc, raw.nreloc);
1887 bfd_h_put_32 (abfd, section->flags, raw.flags);
1888 bfd_h_put_32 (abfd, section->reserved1, raw.reserved1);
1889 bfd_h_put_32 (abfd, section->reserved2, raw.reserved2);
1890 bfd_h_put_32 (abfd, section->reserved3, raw.reserved3);
1891
1892 if (bfd_bwrite (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd)
1893 != BFD_MACH_O_SECTION_64_SIZE)
1894 return FALSE;
1895
1896 return TRUE;
1897 }
1898
1899 static bfd_boolean
1900 bfd_mach_o_write_segment_32 (bfd *abfd, bfd_mach_o_load_command *command)
1901 {
1902 struct mach_o_segment_command_32_external raw;
1903 bfd_mach_o_segment_command *seg = &command->command.segment;
1904 bfd_mach_o_section *sec;
1905
1906 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT);
1907
1908 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1909 if (!bfd_mach_o_write_relocs (abfd, sec))
1910 return FALSE;
1911
1912 memcpy (raw.segname, seg->segname, 16);
1913 bfd_h_put_32 (abfd, seg->vmaddr, raw.vmaddr);
1914 bfd_h_put_32 (abfd, seg->vmsize, raw.vmsize);
1915 bfd_h_put_32 (abfd, seg->fileoff, raw.fileoff);
1916 bfd_h_put_32 (abfd, seg->filesize, raw.filesize);
1917 bfd_h_put_32 (abfd, seg->maxprot, raw.maxprot);
1918 bfd_h_put_32 (abfd, seg->initprot, raw.initprot);
1919 bfd_h_put_32 (abfd, seg->nsects, raw.nsects);
1920 bfd_h_put_32 (abfd, seg->flags, raw.flags);
1921
1922 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1923 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1924 return FALSE;
1925
1926 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1927 if (!bfd_mach_o_write_section_32 (abfd, sec))
1928 return FALSE;
1929
1930 return TRUE;
1931 }
1932
1933 static bfd_boolean
1934 bfd_mach_o_write_segment_64 (bfd *abfd, bfd_mach_o_load_command *command)
1935 {
1936 struct mach_o_segment_command_64_external raw;
1937 bfd_mach_o_segment_command *seg = &command->command.segment;
1938 bfd_mach_o_section *sec;
1939
1940 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64);
1941
1942 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1943 if (!bfd_mach_o_write_relocs (abfd, sec))
1944 return FALSE;
1945
1946 memcpy (raw.segname, seg->segname, 16);
1947 bfd_h_put_64 (abfd, seg->vmaddr, raw.vmaddr);
1948 bfd_h_put_64 (abfd, seg->vmsize, raw.vmsize);
1949 bfd_h_put_64 (abfd, seg->fileoff, raw.fileoff);
1950 bfd_h_put_64 (abfd, seg->filesize, raw.filesize);
1951 bfd_h_put_32 (abfd, seg->maxprot, raw.maxprot);
1952 bfd_h_put_32 (abfd, seg->initprot, raw.initprot);
1953 bfd_h_put_32 (abfd, seg->nsects, raw.nsects);
1954 bfd_h_put_32 (abfd, seg->flags, raw.flags);
1955
1956 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1957 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1958 return FALSE;
1959
1960 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1961 if (!bfd_mach_o_write_section_64 (abfd, sec))
1962 return FALSE;
1963
1964 return TRUE;
1965 }
1966
1967 static bfd_boolean
1968 bfd_mach_o_write_symtab_content (bfd *abfd, bfd_mach_o_symtab_command *sym)
1969 {
1970 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1971 unsigned long i;
1972 unsigned int wide = bfd_mach_o_wide_p (abfd);
1973 struct bfd_strtab_hash *strtab;
1974 asymbol **symbols = bfd_get_outsymbols (abfd);
1975 int padlen;
1976
1977 /* Write the symbols first. */
1978 if (bfd_seek (abfd, sym->symoff, SEEK_SET) != 0)
1979 return FALSE;
1980
1981 strtab = _bfd_stringtab_init ();
1982 if (strtab == NULL)
1983 return FALSE;
1984
1985 if (sym->nsyms > 0)
1986 /* Although we don't strictly need to do this, for compatibility with
1987 Darwin system tools, actually output an empty string for the index
1988 0 entry. */
1989 _bfd_stringtab_add (strtab, "", TRUE, FALSE);
1990
1991 for (i = 0; i < sym->nsyms; i++)
1992 {
1993 bfd_size_type str_index;
1994 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
1995
1996 if (s->symbol.name == 0 || s->symbol.name[0] == '\0')
1997 /* An index of 0 always means the empty string. */
1998 str_index = 0;
1999 else
2000 {
2001 str_index = _bfd_stringtab_add (strtab, s->symbol.name, TRUE, FALSE);
2002
2003 if (str_index == (bfd_size_type) -1)
2004 goto err;
2005 }
2006
2007 if (wide)
2008 {
2009 struct mach_o_nlist_64_external raw;
2010
2011 bfd_h_put_32 (abfd, str_index, raw.n_strx);
2012 bfd_h_put_8 (abfd, s->n_type, raw.n_type);
2013 bfd_h_put_8 (abfd, s->n_sect, raw.n_sect);
2014 bfd_h_put_16 (abfd, s->n_desc, raw.n_desc);
2015 bfd_h_put_64 (abfd, s->symbol.section->vma + s->symbol.value,
2016 raw.n_value);
2017
2018 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
2019 goto err;
2020 }
2021 else
2022 {
2023 struct mach_o_nlist_external raw;
2024
2025 bfd_h_put_32 (abfd, str_index, raw.n_strx);
2026 bfd_h_put_8 (abfd, s->n_type, raw.n_type);
2027 bfd_h_put_8 (abfd, s->n_sect, raw.n_sect);
2028 bfd_h_put_16 (abfd, s->n_desc, raw.n_desc);
2029 bfd_h_put_32 (abfd, s->symbol.section->vma + s->symbol.value,
2030 raw.n_value);
2031
2032 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
2033 goto err;
2034 }
2035 }
2036 sym->strsize = _bfd_stringtab_size (strtab);
2037 sym->stroff = mdata->filelen;
2038 mdata->filelen += sym->strsize;
2039
2040 if (bfd_seek (abfd, sym->stroff, SEEK_SET) != 0)
2041 goto err;
2042
2043 if (!_bfd_stringtab_emit (abfd, strtab))
2044 goto err;
2045
2046 /* Pad string table. */
2047 padlen = bfd_mach_o_pad4 (abfd, sym->strsize);
2048 if (padlen < 0)
2049 return FALSE;
2050 mdata->filelen += padlen;
2051 sym->strsize += padlen;
2052
2053 return TRUE;
2054
2055 err:
2056 _bfd_stringtab_free (strtab);
2057 sym->strsize = 0;
2058 return FALSE;
2059 }
2060
2061 static bfd_boolean
2062 bfd_mach_o_write_symtab (bfd *abfd, bfd_mach_o_load_command *command)
2063 {
2064 bfd_mach_o_symtab_command *sym = &command->command.symtab;
2065 struct mach_o_symtab_command_external raw;
2066
2067 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB);
2068
2069 /* The command. */
2070 bfd_h_put_32 (abfd, sym->symoff, raw.symoff);
2071 bfd_h_put_32 (abfd, sym->nsyms, raw.nsyms);
2072 bfd_h_put_32 (abfd, sym->stroff, raw.stroff);
2073 bfd_h_put_32 (abfd, sym->strsize, raw.strsize);
2074
2075 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
2076 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
2077 return FALSE;
2078
2079 return TRUE;
2080 }
2081
2082 /* Count the number of indirect symbols in the image.
2083 Requires that the sections are in their final order. */
2084
2085 static unsigned int
2086 bfd_mach_o_count_indirect_symbols (bfd *abfd, bfd_mach_o_data_struct *mdata)
2087 {
2088 unsigned int i;
2089 unsigned int nisyms = 0;
2090
2091 for (i = 0; i < mdata->nsects; ++i)
2092 {
2093 bfd_mach_o_section *sec = mdata->sections[i];
2094
2095 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2096 {
2097 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
2098 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
2099 case BFD_MACH_O_S_SYMBOL_STUBS:
2100 nisyms += bfd_mach_o_section_get_nbr_indirect (abfd, sec);
2101 break;
2102 default:
2103 break;
2104 }
2105 }
2106 return nisyms;
2107 }
2108
2109 /* Create the dysymtab. */
2110
2111 static bfd_boolean
2112 bfd_mach_o_build_dysymtab (bfd *abfd, bfd_mach_o_dysymtab_command *cmd)
2113 {
2114 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2115
2116 /* TODO:
2117 We are not going to try and fill these in yet and, moreover, we are
2118 going to bail if they are already set. */
2119 if (cmd->nmodtab != 0
2120 || cmd->ntoc != 0
2121 || cmd->nextrefsyms != 0)
2122 {
2123 _bfd_error_handler (_("sorry: modtab, toc and extrefsyms are not yet"
2124 " implemented for dysymtab commands."));
2125 return FALSE;
2126 }
2127
2128 cmd->ilocalsym = 0;
2129
2130 if (bfd_get_symcount (abfd) > 0)
2131 {
2132 asymbol **symbols = bfd_get_outsymbols (abfd);
2133 unsigned long i;
2134
2135 /* Count the number of each kind of symbol. */
2136 for (i = 0; i < bfd_get_symcount (abfd); ++i)
2137 {
2138 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2139 if (s->n_type & (BFD_MACH_O_N_EXT | BFD_MACH_O_N_PEXT))
2140 break;
2141 }
2142 cmd->nlocalsym = i;
2143 cmd->iextdefsym = i;
2144 for (; i < bfd_get_symcount (abfd); ++i)
2145 {
2146 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2147 if ((s->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_UNDF)
2148 break;
2149 }
2150 cmd->nextdefsym = i - cmd->nlocalsym;
2151 cmd->iundefsym = cmd->nextdefsym + cmd->iextdefsym;
2152 cmd->nundefsym = bfd_get_symcount (abfd)
2153 - cmd->nlocalsym
2154 - cmd->nextdefsym;
2155 }
2156 else
2157 {
2158 cmd->nlocalsym = 0;
2159 cmd->iextdefsym = 0;
2160 cmd->nextdefsym = 0;
2161 cmd->iundefsym = 0;
2162 cmd->nundefsym = 0;
2163 }
2164
2165 cmd->nindirectsyms = bfd_mach_o_count_indirect_symbols (abfd, mdata);
2166 if (cmd->nindirectsyms > 0)
2167 {
2168 unsigned i;
2169 unsigned n;
2170
2171 mdata->filelen = FILE_ALIGN (mdata->filelen, 2);
2172 cmd->indirectsymoff = mdata->filelen;
2173 mdata->filelen += cmd->nindirectsyms * 4;
2174
2175 if (cmd->nindirectsyms * 4 < cmd->nindirectsyms)
2176 return FALSE;
2177 cmd->indirect_syms = bfd_zalloc (abfd, cmd->nindirectsyms * 4);
2178 if (cmd->indirect_syms == NULL)
2179 return FALSE;
2180
2181 n = 0;
2182 for (i = 0; i < mdata->nsects; ++i)
2183 {
2184 bfd_mach_o_section *sec = mdata->sections[i];
2185
2186 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2187 {
2188 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
2189 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
2190 case BFD_MACH_O_S_SYMBOL_STUBS:
2191 {
2192 unsigned j, num;
2193 bfd_mach_o_asymbol **isyms = sec->indirect_syms;
2194
2195 num = bfd_mach_o_section_get_nbr_indirect (abfd, sec);
2196 if (isyms == NULL || num == 0)
2197 break;
2198 /* Record the starting index in the reserved1 field. */
2199 sec->reserved1 = n;
2200 for (j = 0; j < num; j++, n++)
2201 {
2202 if (isyms[j] == NULL)
2203 cmd->indirect_syms[n] = BFD_MACH_O_INDIRECT_SYM_LOCAL;
2204 else if (isyms[j]->symbol.section == bfd_abs_section_ptr
2205 && ! (isyms[j]->n_type & BFD_MACH_O_N_EXT))
2206 cmd->indirect_syms[n] = BFD_MACH_O_INDIRECT_SYM_LOCAL
2207 | BFD_MACH_O_INDIRECT_SYM_ABS;
2208 else
2209 cmd->indirect_syms[n] = isyms[j]->symbol.udata.i;
2210 }
2211 }
2212 break;
2213 default:
2214 break;
2215 }
2216 }
2217 }
2218
2219 return TRUE;
2220 }
2221
2222 /* Write a dysymtab command.
2223 TODO: Possibly coalesce writes of smaller objects. */
2224
2225 static bfd_boolean
2226 bfd_mach_o_write_dysymtab (bfd *abfd, bfd_mach_o_load_command *command)
2227 {
2228 bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab;
2229
2230 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB);
2231
2232 if (cmd->nmodtab != 0)
2233 {
2234 unsigned int i;
2235
2236 if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0)
2237 return FALSE;
2238
2239 for (i = 0; i < cmd->nmodtab; i++)
2240 {
2241 bfd_mach_o_dylib_module *module = &cmd->dylib_module[i];
2242 unsigned int iinit;
2243 unsigned int ninit;
2244
2245 iinit = module->iinit & 0xffff;
2246 iinit |= ((module->iterm & 0xffff) << 16);
2247
2248 ninit = module->ninit & 0xffff;
2249 ninit |= ((module->nterm & 0xffff) << 16);
2250
2251 if (bfd_mach_o_wide_p (abfd))
2252 {
2253 struct mach_o_dylib_module_64_external w;
2254
2255 bfd_h_put_32 (abfd, module->module_name_idx, &w.module_name);
2256 bfd_h_put_32 (abfd, module->iextdefsym, &w.iextdefsym);
2257 bfd_h_put_32 (abfd, module->nextdefsym, &w.nextdefsym);
2258 bfd_h_put_32 (abfd, module->irefsym, &w.irefsym);
2259 bfd_h_put_32 (abfd, module->nrefsym, &w.nrefsym);
2260 bfd_h_put_32 (abfd, module->ilocalsym, &w.ilocalsym);
2261 bfd_h_put_32 (abfd, module->nlocalsym, &w.nlocalsym);
2262 bfd_h_put_32 (abfd, module->iextrel, &w.iextrel);
2263 bfd_h_put_32 (abfd, module->nextrel, &w.nextrel);
2264 bfd_h_put_32 (abfd, iinit, &w.iinit_iterm);
2265 bfd_h_put_32 (abfd, ninit, &w.ninit_nterm);
2266 bfd_h_put_64 (abfd, module->objc_module_info_addr,
2267 &w.objc_module_info_addr);
2268 bfd_h_put_32 (abfd, module->objc_module_info_size,
2269 &w.objc_module_info_size);
2270
2271 if (bfd_bwrite ((void *) &w, sizeof (w), abfd) != sizeof (w))
2272 return FALSE;
2273 }
2274 else
2275 {
2276 struct mach_o_dylib_module_external n;
2277
2278 bfd_h_put_32 (abfd, module->module_name_idx, &n.module_name);
2279 bfd_h_put_32 (abfd, module->iextdefsym, &n.iextdefsym);
2280 bfd_h_put_32 (abfd, module->nextdefsym, &n.nextdefsym);
2281 bfd_h_put_32 (abfd, module->irefsym, &n.irefsym);
2282 bfd_h_put_32 (abfd, module->nrefsym, &n.nrefsym);
2283 bfd_h_put_32 (abfd, module->ilocalsym, &n.ilocalsym);
2284 bfd_h_put_32 (abfd, module->nlocalsym, &n.nlocalsym);
2285 bfd_h_put_32 (abfd, module->iextrel, &n.iextrel);
2286 bfd_h_put_32 (abfd, module->nextrel, &n.nextrel);
2287 bfd_h_put_32 (abfd, iinit, &n.iinit_iterm);
2288 bfd_h_put_32 (abfd, ninit, &n.ninit_nterm);
2289 bfd_h_put_32 (abfd, module->objc_module_info_addr,
2290 &n.objc_module_info_addr);
2291 bfd_h_put_32 (abfd, module->objc_module_info_size,
2292 &n.objc_module_info_size);
2293
2294 if (bfd_bwrite ((void *) &n, sizeof (n), abfd) != sizeof (n))
2295 return FALSE;
2296 }
2297 }
2298 }
2299
2300 if (cmd->ntoc != 0)
2301 {
2302 unsigned int i;
2303
2304 if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0)
2305 return FALSE;
2306
2307 for (i = 0; i < cmd->ntoc; i++)
2308 {
2309 struct mach_o_dylib_table_of_contents_external raw;
2310 bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i];
2311
2312 bfd_h_put_32 (abfd, toc->symbol_index, &raw.symbol_index);
2313 bfd_h_put_32 (abfd, toc->module_index, &raw.module_index);
2314
2315 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
2316 return FALSE;
2317 }
2318 }
2319
2320 if (cmd->nindirectsyms > 0)
2321 {
2322 unsigned int i;
2323
2324 if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0)
2325 return FALSE;
2326
2327 for (i = 0; i < cmd->nindirectsyms; ++i)
2328 {
2329 unsigned char raw[4];
2330
2331 bfd_h_put_32 (abfd, cmd->indirect_syms[i], &raw);
2332 if (bfd_bwrite (raw, sizeof (raw), abfd) != sizeof (raw))
2333 return FALSE;
2334 }
2335 }
2336
2337 if (cmd->nextrefsyms != 0)
2338 {
2339 unsigned int i;
2340
2341 if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0)
2342 return FALSE;
2343
2344 for (i = 0; i < cmd->nextrefsyms; i++)
2345 {
2346 unsigned long v;
2347 unsigned char raw[4];
2348 bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i];
2349
2350 /* Fields isym and flags are written as bit-fields, thus we need
2351 a specific processing for endianness. */
2352
2353 if (bfd_big_endian (abfd))
2354 {
2355 v = ((ref->isym & 0xffffff) << 8);
2356 v |= ref->flags & 0xff;
2357 }
2358 else
2359 {
2360 v = ref->isym & 0xffffff;
2361 v |= ((ref->flags & 0xff) << 24);
2362 }
2363
2364 bfd_h_put_32 (abfd, v, raw);
2365 if (bfd_bwrite (raw, sizeof (raw), abfd) != sizeof (raw))
2366 return FALSE;
2367 }
2368 }
2369
2370 /* The command. */
2371 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0)
2372 return FALSE;
2373 else
2374 {
2375 struct mach_o_dysymtab_command_external raw;
2376
2377 bfd_h_put_32 (abfd, cmd->ilocalsym, &raw.ilocalsym);
2378 bfd_h_put_32 (abfd, cmd->nlocalsym, &raw.nlocalsym);
2379 bfd_h_put_32 (abfd, cmd->iextdefsym, &raw.iextdefsym);
2380 bfd_h_put_32 (abfd, cmd->nextdefsym, &raw.nextdefsym);
2381 bfd_h_put_32 (abfd, cmd->iundefsym, &raw.iundefsym);
2382 bfd_h_put_32 (abfd, cmd->nundefsym, &raw.nundefsym);
2383 bfd_h_put_32 (abfd, cmd->tocoff, &raw.tocoff);
2384 bfd_h_put_32 (abfd, cmd->ntoc, &raw.ntoc);
2385 bfd_h_put_32 (abfd, cmd->modtaboff, &raw.modtaboff);
2386 bfd_h_put_32 (abfd, cmd->nmodtab, &raw.nmodtab);
2387 bfd_h_put_32 (abfd, cmd->extrefsymoff, &raw.extrefsymoff);
2388 bfd_h_put_32 (abfd, cmd->nextrefsyms, &raw.nextrefsyms);
2389 bfd_h_put_32 (abfd, cmd->indirectsymoff, &raw.indirectsymoff);
2390 bfd_h_put_32 (abfd, cmd->nindirectsyms, &raw.nindirectsyms);
2391 bfd_h_put_32 (abfd, cmd->extreloff, &raw.extreloff);
2392 bfd_h_put_32 (abfd, cmd->nextrel, &raw.nextrel);
2393 bfd_h_put_32 (abfd, cmd->locreloff, &raw.locreloff);
2394 bfd_h_put_32 (abfd, cmd->nlocrel, &raw.nlocrel);
2395
2396 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
2397 return FALSE;
2398 }
2399
2400 return TRUE;
2401 }
2402
2403 static unsigned
2404 bfd_mach_o_primary_symbol_sort_key (bfd_mach_o_asymbol *s)
2405 {
2406 unsigned mtyp = s->n_type & BFD_MACH_O_N_TYPE;
2407
2408 /* Just leave debug symbols where they are (pretend they are local, and
2409 then they will just be sorted on position). */
2410 if (s->n_type & BFD_MACH_O_N_STAB)
2411 return 0;
2412
2413 /* Local (we should never see an undefined local AFAICT). */
2414 if (! (s->n_type & (BFD_MACH_O_N_EXT | BFD_MACH_O_N_PEXT)))
2415 return 0;
2416
2417 /* Common symbols look like undefined externs. */
2418 if (mtyp == BFD_MACH_O_N_UNDF)
2419 return 2;
2420
2421 /* A defined non-local, non-debug symbol. */
2422 return 1;
2423 }
2424
2425 static int
2426 bfd_mach_o_cf_symbols (const void *a, const void *b)
2427 {
2428 bfd_mach_o_asymbol *sa = *(bfd_mach_o_asymbol **) a;
2429 bfd_mach_o_asymbol *sb = *(bfd_mach_o_asymbol **) b;
2430 unsigned int soa, sob;
2431
2432 soa = bfd_mach_o_primary_symbol_sort_key (sa);
2433 sob = bfd_mach_o_primary_symbol_sort_key (sb);
2434 if (soa < sob)
2435 return -1;
2436
2437 if (soa > sob)
2438 return 1;
2439
2440 /* If it's local or stab, just preserve the input order. */
2441 if (soa == 0)
2442 {
2443 if (sa->symbol.udata.i < sb->symbol.udata.i)
2444 return -1;
2445 if (sa->symbol.udata.i > sb->symbol.udata.i)
2446 return 1;
2447
2448 /* This is probably an error. */
2449 return 0;
2450 }
2451
2452 /* The second sort key is name. */
2453 return strcmp (sa->symbol.name, sb->symbol.name);
2454 }
2455
2456 /* Process the symbols.
2457
2458 This should be OK for single-module files - but it is not likely to work
2459 for multi-module shared libraries.
2460
2461 (a) If the application has not filled in the relevant mach-o fields, make
2462 an estimate.
2463
2464 (b) Order them, like this:
2465 ( i) local.
2466 (unsorted)
2467 ( ii) external defined
2468 (by name)
2469 (iii) external undefined/common
2470 (by name)
2471 ( iv) common
2472 (by name)
2473 */
2474
2475 static bfd_boolean
2476 bfd_mach_o_mangle_symbols (bfd *abfd)
2477 {
2478 unsigned long i;
2479 asymbol **symbols = bfd_get_outsymbols (abfd);
2480
2481 if (symbols == NULL || bfd_get_symcount (abfd) == 0)
2482 return TRUE;
2483
2484 for (i = 0; i < bfd_get_symcount (abfd); i++)
2485 {
2486 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2487
2488 /* We use this value, which is out-of-range as a symbol index, to signal
2489 that the mach-o-specific data are not filled in and need to be created
2490 from the bfd values. It is much preferable for the application to do
2491 this, since more meaningful diagnostics can be made that way. */
2492
2493 if (s->symbol.udata.i == SYM_MACHO_FIELDS_UNSET)
2494 {
2495 /* No symbol information has been set - therefore determine
2496 it from the bfd symbol flags/info. */
2497 if (s->symbol.section == bfd_abs_section_ptr)
2498 s->n_type = BFD_MACH_O_N_ABS;
2499 else if (s->symbol.section == bfd_und_section_ptr)
2500 {
2501 s->n_type = BFD_MACH_O_N_UNDF;
2502 if (s->symbol.flags & BSF_WEAK)
2503 s->n_desc |= BFD_MACH_O_N_WEAK_REF;
2504 /* mach-o automatically makes undefined symbols extern. */
2505 s->n_type |= BFD_MACH_O_N_EXT;
2506 s->symbol.flags |= BSF_GLOBAL;
2507 }
2508 else if (s->symbol.section == bfd_com_section_ptr)
2509 {
2510 s->n_type = BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT;
2511 s->symbol.flags |= BSF_GLOBAL;
2512 }
2513 else
2514 s->n_type = BFD_MACH_O_N_SECT;
2515 }
2516
2517 /* Update external symbol bit in case objcopy changed it. */
2518 if (s->symbol.flags & BSF_GLOBAL)
2519 s->n_type |= BFD_MACH_O_N_EXT;
2520 else
2521 s->n_type &= ~BFD_MACH_O_N_EXT;
2522
2523 /* Put the section index in, where required. */
2524 if ((s->symbol.section != bfd_abs_section_ptr
2525 && s->symbol.section != bfd_und_section_ptr
2526 && s->symbol.section != bfd_com_section_ptr)
2527 || ((s->n_type & BFD_MACH_O_N_STAB) != 0
2528 && s->symbol.name == NULL))
2529 s->n_sect = s->symbol.section->output_section->target_index;
2530
2531 /* Number to preserve order for local and debug syms. */
2532 s->symbol.udata.i = i;
2533 }
2534
2535 /* Sort the symbols. */
2536 qsort ((void *) symbols, (size_t) bfd_get_symcount (abfd),
2537 sizeof (asymbol *), bfd_mach_o_cf_symbols);
2538
2539 for (i = 0; i < bfd_get_symcount (abfd); ++i)
2540 {
2541 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2542 s->symbol.udata.i = i; /* renumber. */
2543 }
2544
2545 return TRUE;
2546 }
2547
2548 /* We build a flat table of sections, which can be re-ordered if necessary.
2549 Fill in the section number and other mach-o-specific data. */
2550
2551 static bfd_boolean
2552 bfd_mach_o_mangle_sections (bfd *abfd, bfd_mach_o_data_struct *mdata)
2553 {
2554 asection *sec;
2555 unsigned target_index;
2556 unsigned nsect;
2557
2558 nsect = bfd_count_sections (abfd);
2559
2560 /* Don't do it if it's already set - assume the application knows what it's
2561 doing. */
2562 if (mdata->nsects == nsect
2563 && (mdata->nsects == 0 || mdata->sections != NULL))
2564 return TRUE;
2565
2566 /* We need to check that this can be done... */
2567 if (nsect > 255)
2568 {
2569 _bfd_error_handler (_("mach-o: there are too many sections (%u)"
2570 " maximum is 255,\n"), nsect);
2571 return FALSE;
2572 }
2573
2574 mdata->nsects = nsect;
2575 mdata->sections = bfd_alloc2 (abfd,
2576 mdata->nsects, sizeof (bfd_mach_o_section *));
2577 if (mdata->sections == NULL)
2578 return FALSE;
2579
2580 /* Create Mach-O sections.
2581 Section type, attribute and align should have been set when the
2582 section was created - either read in or specified. */
2583 target_index = 0;
2584 for (sec = abfd->sections; sec; sec = sec->next)
2585 {
2586 unsigned bfd_align = bfd_section_alignment (sec);
2587 bfd_mach_o_section *msect = bfd_mach_o_get_mach_o_section (sec);
2588
2589 mdata->sections[target_index] = msect;
2590
2591 msect->addr = bfd_section_vma (sec);
2592 msect->size = bfd_section_size (sec);
2593
2594 /* Use the largest alignment set, in case it was bumped after the
2595 section was created. */
2596 msect->align = msect->align > bfd_align ? msect->align : bfd_align;
2597
2598 msect->offset = 0;
2599 sec->target_index = ++target_index;
2600 }
2601
2602 return TRUE;
2603 }
2604
2605 bfd_boolean
2606 bfd_mach_o_write_contents (bfd *abfd)
2607 {
2608 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2609 bfd_mach_o_load_command *cmd;
2610 bfd_mach_o_symtab_command *symtab = NULL;
2611 bfd_mach_o_dysymtab_command *dysymtab = NULL;
2612 bfd_mach_o_segment_command *linkedit = NULL;
2613
2614 /* Make the commands, if not already present. */
2615 if (!abfd->output_has_begun && !bfd_mach_o_build_commands (abfd))
2616 return FALSE;
2617 abfd->output_has_begun = TRUE;
2618
2619 /* Write the header. */
2620 if (!bfd_mach_o_write_header (abfd, &mdata->header))
2621 return FALSE;
2622
2623 /* First pass: allocate the linkedit segment. */
2624 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
2625 switch (cmd->type)
2626 {
2627 case BFD_MACH_O_LC_SEGMENT_64:
2628 case BFD_MACH_O_LC_SEGMENT:
2629 if (strcmp (cmd->command.segment.segname, "__LINKEDIT") == 0)
2630 linkedit = &cmd->command.segment;
2631 break;
2632 case BFD_MACH_O_LC_SYMTAB:
2633 symtab = &cmd->command.symtab;
2634 break;
2635 case BFD_MACH_O_LC_DYSYMTAB:
2636 dysymtab = &cmd->command.dysymtab;
2637 break;
2638 case BFD_MACH_O_LC_DYLD_INFO:
2639 {
2640 bfd_mach_o_dyld_info_command *di = &cmd->command.dyld_info;
2641
2642 if (di->rebase_size != 0)
2643 {
2644 di->rebase_off = mdata->filelen;
2645 mdata->filelen += di->rebase_size;
2646 }
2647 if (di->bind_size != 0)
2648 {
2649 di->bind_off = mdata->filelen;
2650 mdata->filelen += di->bind_size;
2651 }
2652 if (di->weak_bind_size != 0)
2653 {
2654 di->weak_bind_off = mdata->filelen;
2655 mdata->filelen += di->weak_bind_size;
2656 }
2657 if (di->lazy_bind_size != 0)
2658 {
2659 di->lazy_bind_off = mdata->filelen;
2660 mdata->filelen += di->lazy_bind_size;
2661 }
2662 if (di->export_size != 0)
2663 {
2664 di->export_off = mdata->filelen;
2665 mdata->filelen += di->export_size;
2666 }
2667 }
2668 break;
2669 case BFD_MACH_O_LC_LOAD_DYLIB:
2670 case BFD_MACH_O_LC_LOAD_DYLINKER:
2671 case BFD_MACH_O_LC_MAIN:
2672 /* Nothing to do. */
2673 break;
2674 default:
2675 _bfd_error_handler
2676 (_("unable to allocate data for load command %#x"),
2677 cmd->type);
2678 break;
2679 }
2680
2681 /* Specially handle symtab and dysymtab. */
2682
2683 /* Pre-allocate the symbol table (but not the string table). The reason
2684 is that the dysymtab is after the symbol table but before the string
2685 table (required by the native strip tool). */
2686 if (symtab != NULL)
2687 {
2688 unsigned int symlen;
2689 unsigned int wide = bfd_mach_o_wide_p (abfd);
2690
2691 symlen = wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE;
2692
2693 /* Align for symbols. */
2694 mdata->filelen = FILE_ALIGN (mdata->filelen, wide ? 3 : 2);
2695 symtab->symoff = mdata->filelen;
2696
2697 symtab->nsyms = bfd_get_symcount (abfd);
2698 mdata->filelen += symtab->nsyms * symlen;
2699 }
2700
2701 /* Build the dysymtab. */
2702 if (dysymtab != NULL)
2703 if (!bfd_mach_o_build_dysymtab (abfd, dysymtab))
2704 return FALSE;
2705
2706 /* Write symtab and strtab. */
2707 if (symtab != NULL)
2708 if (!bfd_mach_o_write_symtab_content (abfd, symtab))
2709 return FALSE;
2710
2711 /* Adjust linkedit size. */
2712 if (linkedit != NULL)
2713 {
2714 /* bfd_vma pagemask = bfd_mach_o_get_backend_data (abfd)->page_size - 1; */
2715
2716 linkedit->vmsize = mdata->filelen - linkedit->fileoff;
2717 /* linkedit->vmsize = (linkedit->vmsize + pagemask) & ~pagemask; */
2718 linkedit->filesize = mdata->filelen - linkedit->fileoff;
2719
2720 linkedit->initprot = BFD_MACH_O_PROT_READ;
2721 linkedit->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
2722 | BFD_MACH_O_PROT_EXECUTE;
2723 }
2724
2725 /* Second pass: write commands. */
2726 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
2727 {
2728 struct mach_o_load_command_external raw;
2729 unsigned long typeflag;
2730
2731 typeflag = cmd->type | (cmd->type_required ? BFD_MACH_O_LC_REQ_DYLD : 0);
2732
2733 bfd_h_put_32 (abfd, typeflag, raw.cmd);
2734 bfd_h_put_32 (abfd, cmd->len, raw.cmdsize);
2735
2736 if (bfd_seek (abfd, cmd->offset, SEEK_SET) != 0
2737 || bfd_bwrite (&raw, BFD_MACH_O_LC_SIZE, abfd) != 8)
2738 return FALSE;
2739
2740 switch (cmd->type)
2741 {
2742 case BFD_MACH_O_LC_SEGMENT:
2743 if (!bfd_mach_o_write_segment_32 (abfd, cmd))
2744 return FALSE;
2745 break;
2746 case BFD_MACH_O_LC_SEGMENT_64:
2747 if (!bfd_mach_o_write_segment_64 (abfd, cmd))
2748 return FALSE;
2749 break;
2750 case BFD_MACH_O_LC_SYMTAB:
2751 if (!bfd_mach_o_write_symtab (abfd, cmd))
2752 return FALSE;
2753 break;
2754 case BFD_MACH_O_LC_DYSYMTAB:
2755 if (!bfd_mach_o_write_dysymtab (abfd, cmd))
2756 return FALSE;
2757 break;
2758 case BFD_MACH_O_LC_THREAD:
2759 case BFD_MACH_O_LC_UNIXTHREAD:
2760 if (!bfd_mach_o_write_thread (abfd, cmd))
2761 return FALSE;
2762 break;
2763 case BFD_MACH_O_LC_LOAD_DYLIB:
2764 if (!bfd_mach_o_write_dylib (abfd, cmd))
2765 return FALSE;
2766 break;
2767 case BFD_MACH_O_LC_LOAD_DYLINKER:
2768 if (!bfd_mach_o_write_dylinker (abfd, cmd))
2769 return FALSE;
2770 break;
2771 case BFD_MACH_O_LC_MAIN:
2772 if (!bfd_mach_o_write_main (abfd, cmd))
2773 return FALSE;
2774 break;
2775 case BFD_MACH_O_LC_DYLD_INFO:
2776 if (!bfd_mach_o_write_dyld_info (abfd, cmd))
2777 return FALSE;
2778 break;
2779 default:
2780 _bfd_error_handler
2781 (_("unable to write unknown load command %#x"),
2782 cmd->type);
2783 return FALSE;
2784 }
2785 }
2786
2787 return TRUE;
2788 }
2789
2790 static void
2791 bfd_mach_o_append_section_to_segment (bfd_mach_o_segment_command *seg,
2792 bfd_mach_o_section *s)
2793 {
2794 if (seg->sect_head == NULL)
2795 seg->sect_head = s;
2796 else
2797 seg->sect_tail->next = s;
2798 seg->sect_tail = s;
2799 }
2800
2801 /* Create section Mach-O flags from BFD flags. */
2802
2803 static void
2804 bfd_mach_o_set_section_flags_from_bfd (bfd *abfd ATTRIBUTE_UNUSED,
2805 asection *sec)
2806 {
2807 flagword bfd_flags;
2808 bfd_mach_o_section *s = bfd_mach_o_get_mach_o_section (sec);
2809
2810 /* Create default flags. */
2811 bfd_flags = bfd_section_flags (sec);
2812 if ((bfd_flags & SEC_CODE) == SEC_CODE)
2813 s->flags = BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS
2814 | BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS
2815 | BFD_MACH_O_S_REGULAR;
2816 else if ((bfd_flags & (SEC_ALLOC | SEC_LOAD)) == SEC_ALLOC)
2817 s->flags = BFD_MACH_O_S_ZEROFILL;
2818 else if (bfd_flags & SEC_DEBUGGING)
2819 s->flags = BFD_MACH_O_S_REGULAR | BFD_MACH_O_S_ATTR_DEBUG;
2820 else
2821 s->flags = BFD_MACH_O_S_REGULAR;
2822 }
2823
2824 static bfd_boolean
2825 bfd_mach_o_build_obj_seg_command (bfd *abfd, bfd_mach_o_segment_command *seg)
2826 {
2827 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2828 unsigned int i, j;
2829
2830 seg->vmaddr = 0;
2831 seg->fileoff = mdata->filelen;
2832 seg->initprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
2833 | BFD_MACH_O_PROT_EXECUTE;
2834 seg->maxprot = seg->initprot;
2835
2836 /* Append sections to the segment.
2837
2838 This is a little tedious, we have to honor the need to account zerofill
2839 sections after all the rest. This forces us to do the calculation of
2840 total vmsize in three passes so that any alignment increments are
2841 properly accounted. */
2842 for (i = 0; i < mdata->nsects; ++i)
2843 {
2844 bfd_mach_o_section *s = mdata->sections[i];
2845 asection *sec = s->bfdsection;
2846
2847 /* Although we account for zerofill section sizes in vm order, they are
2848 placed in the file in source sequence. */
2849 bfd_mach_o_append_section_to_segment (seg, s);
2850 s->offset = 0;
2851
2852 /* Zerofill sections have zero file size & offset, the only content
2853 written to the file is the symbols. */
2854 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) == BFD_MACH_O_S_ZEROFILL
2855 || ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2856 == BFD_MACH_O_S_GB_ZEROFILL))
2857 continue;
2858
2859 /* The Darwin system tools (in MH_OBJECT files, at least) always account
2860 sections, even those with zero size. */
2861 if (s->size > 0)
2862 {
2863 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2864 seg->vmsize += s->size;
2865
2866 /* MH_OBJECT files have unaligned content. */
2867 if (1)
2868 {
2869 seg->filesize = FILE_ALIGN (seg->filesize, s->align);
2870 mdata->filelen = FILE_ALIGN (mdata->filelen, s->align);
2871 }
2872 seg->filesize += s->size;
2873
2874 /* The system tools write even zero-sized sections with an offset
2875 field set to the current file position. */
2876 s->offset = mdata->filelen;
2877 }
2878
2879 sec->filepos = s->offset;
2880 mdata->filelen += s->size;
2881 }
2882
2883 /* Now pass through again, for zerofill, only now we just update the
2884 vmsize, and then for zerofill_GB. */
2885 for (j = 0; j < 2; j++)
2886 {
2887 unsigned int stype;
2888
2889 if (j == 0)
2890 stype = BFD_MACH_O_S_ZEROFILL;
2891 else
2892 stype = BFD_MACH_O_S_GB_ZEROFILL;
2893
2894 for (i = 0; i < mdata->nsects; ++i)
2895 {
2896 bfd_mach_o_section *s = mdata->sections[i];
2897
2898 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != stype)
2899 continue;
2900
2901 if (s->size > 0)
2902 {
2903 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2904 seg->vmsize += s->size;
2905 }
2906 }
2907 }
2908
2909 /* Allocate space for the relocations. */
2910 mdata->filelen = FILE_ALIGN (mdata->filelen, 2);
2911
2912 for (i = 0; i < mdata->nsects; ++i)
2913 {
2914 bfd_mach_o_section *ms = mdata->sections[i];
2915 asection *sec = ms->bfdsection;
2916
2917 ms->nreloc = sec->reloc_count;
2918 if (ms->nreloc == 0)
2919 {
2920 /* Clear nreloc and reloff if there is no relocs. */
2921 ms->reloff = 0;
2922 continue;
2923 }
2924 sec->rel_filepos = mdata->filelen;
2925 ms->reloff = sec->rel_filepos;
2926 mdata->filelen += sec->reloc_count * BFD_MACH_O_RELENT_SIZE;
2927 }
2928
2929 return TRUE;
2930 }
2931
2932 static bfd_boolean
2933 bfd_mach_o_build_exec_seg_command (bfd *abfd, bfd_mach_o_segment_command *seg)
2934 {
2935 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2936 unsigned int i;
2937 bfd_vma pagemask = bfd_mach_o_get_backend_data (abfd)->page_size - 1;
2938 bfd_vma vma;
2939 bfd_mach_o_section *s;
2940
2941 seg->vmsize = 0;
2942
2943 seg->fileoff = mdata->filelen;
2944 seg->maxprot = 0;
2945 seg->initprot = 0;
2946 seg->flags = 0;
2947
2948 /* Append sections to the segment. We assume they are properly ordered
2949 by vma (but we check that). */
2950 vma = 0;
2951 for (i = 0; i < mdata->nsects; ++i)
2952 {
2953 s = mdata->sections[i];
2954
2955 /* Consider only sections for this segment. */
2956 if (strcmp (seg->segname, s->segname) != 0)
2957 continue;
2958
2959 bfd_mach_o_append_section_to_segment (seg, s);
2960
2961 if (s->addr < vma)
2962 {
2963 _bfd_error_handler
2964 /* xgettext:c-format */
2965 (_("section address (%#" PRIx64 ") "
2966 "below start of segment (%#" PRIx64 ")"),
2967 (uint64_t) s->addr, (uint64_t) vma);
2968 return FALSE;
2969 }
2970
2971 vma = s->addr + s->size;
2972 }
2973
2974 /* Set segment file offset: make it page aligned. */
2975 vma = seg->sect_head->addr;
2976 seg->vmaddr = vma & ~pagemask;
2977 if ((mdata->filelen & pagemask) > (vma & pagemask))
2978 mdata->filelen += pagemask + 1;
2979 seg->fileoff = mdata->filelen & ~pagemask;
2980 mdata->filelen = seg->fileoff + (vma & pagemask);
2981
2982 /* Set section file offset. */
2983 for (s = seg->sect_head; s != NULL; s = s->next)
2984 {
2985 asection *sec = s->bfdsection;
2986 flagword flags = bfd_section_flags (sec);
2987
2988 /* Adjust segment size. */
2989 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2990 seg->vmsize += s->size;
2991
2992 /* File offset and length. */
2993 seg->filesize = FILE_ALIGN (seg->filesize, s->align);
2994
2995 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != BFD_MACH_O_S_ZEROFILL
2996 && ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2997 != BFD_MACH_O_S_GB_ZEROFILL))
2998 {
2999 mdata->filelen = FILE_ALIGN (mdata->filelen, s->align);
3000
3001 s->offset = mdata->filelen;
3002 s->bfdsection->filepos = s->offset;
3003
3004 seg->filesize += s->size;
3005 mdata->filelen += s->size;
3006 }
3007 else
3008 {
3009 s->offset = 0;
3010 s->bfdsection->filepos = 0;
3011 }
3012
3013 /* Set protection. */
3014 if (flags & SEC_LOAD)
3015 {
3016 if (flags & SEC_CODE)
3017 seg->initprot |= BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_EXECUTE;
3018 if ((flags & (SEC_DATA | SEC_READONLY)) == SEC_DATA)
3019 seg->initprot |= BFD_MACH_O_PROT_WRITE | BFD_MACH_O_PROT_READ;
3020 }
3021
3022 /* Relocs shouldn't appear in non-object files. */
3023 if (s->bfdsection->reloc_count != 0)
3024 return FALSE;
3025 }
3026
3027 /* Set maxprot. */
3028 if (seg->initprot != 0)
3029 seg->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
3030 | BFD_MACH_O_PROT_EXECUTE;
3031 else
3032 seg->maxprot = 0;
3033
3034 /* Round segment size (and file size). */
3035 seg->vmsize = (seg->vmsize + pagemask) & ~pagemask;
3036 seg->filesize = (seg->filesize + pagemask) & ~pagemask;
3037 mdata->filelen = (mdata->filelen + pagemask) & ~pagemask;
3038
3039 return TRUE;
3040 }
3041
3042 /* Layout the commands: set commands size and offset, set ncmds and sizeofcmds
3043 fields in header. */
3044
3045 static bfd_boolean
3046 bfd_mach_o_layout_commands (bfd_mach_o_data_struct *mdata)
3047 {
3048 unsigned wide = mach_o_wide_p (&mdata->header);
3049 unsigned int hdrlen;
3050 ufile_ptr offset;
3051 bfd_mach_o_load_command *cmd;
3052 unsigned int align;
3053 bfd_boolean ret = TRUE;
3054
3055 hdrlen = wide ? BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
3056 align = wide ? 8 - 1 : 4 - 1;
3057 offset = hdrlen;
3058 mdata->header.ncmds = 0;
3059
3060 for (cmd = mdata->first_command; cmd; cmd = cmd->next)
3061 {
3062 mdata->header.ncmds++;
3063 cmd->offset = offset;
3064
3065 switch (cmd->type)
3066 {
3067 case BFD_MACH_O_LC_SEGMENT_64:
3068 cmd->len = BFD_MACH_O_LC_SEGMENT_64_SIZE
3069 + BFD_MACH_O_SECTION_64_SIZE * cmd->command.segment.nsects;
3070 break;
3071 case BFD_MACH_O_LC_SEGMENT:
3072 cmd->len = BFD_MACH_O_LC_SEGMENT_SIZE
3073 + BFD_MACH_O_SECTION_SIZE * cmd->command.segment.nsects;
3074 break;
3075 case BFD_MACH_O_LC_SYMTAB:
3076 cmd->len = sizeof (struct mach_o_symtab_command_external)
3077 + BFD_MACH_O_LC_SIZE;
3078 break;
3079 case BFD_MACH_O_LC_DYSYMTAB:
3080 cmd->len = sizeof (struct mach_o_dysymtab_command_external)
3081 + BFD_MACH_O_LC_SIZE;
3082 break;
3083 case BFD_MACH_O_LC_LOAD_DYLIB:
3084 cmd->len = sizeof (struct mach_o_dylib_command_external)
3085 + BFD_MACH_O_LC_SIZE;
3086 cmd->command.dylib.name_offset = cmd->len;
3087 cmd->len += strlen (cmd->command.dylib.name_str);
3088 cmd->len = (cmd->len + align) & ~align;
3089 break;
3090 case BFD_MACH_O_LC_LOAD_DYLINKER:
3091 cmd->len = sizeof (struct mach_o_str_command_external)
3092 + BFD_MACH_O_LC_SIZE;
3093 cmd->command.dylinker.name_offset = cmd->len;
3094 cmd->len += strlen (cmd->command.dylinker.name_str);
3095 cmd->len = (cmd->len + align) & ~align;
3096 break;
3097 case BFD_MACH_O_LC_MAIN:
3098 cmd->len = sizeof (struct mach_o_entry_point_command_external)
3099 + BFD_MACH_O_LC_SIZE;
3100 break;
3101 case BFD_MACH_O_LC_DYLD_INFO:
3102 cmd->len = sizeof (struct mach_o_dyld_info_command_external)
3103 + BFD_MACH_O_LC_SIZE;
3104 break;
3105 default:
3106 _bfd_error_handler
3107 (_("unable to layout unknown load command %#x"),
3108 cmd->type);
3109 ret = FALSE;
3110 break;
3111 }
3112
3113 BFD_ASSERT (cmd->len % (align + 1) == 0);
3114 offset += cmd->len;
3115 }
3116 mdata->header.sizeofcmds = offset - hdrlen;
3117 mdata->filelen = offset;
3118
3119 return ret;
3120 }
3121
3122 /* Subroutine of bfd_mach_o_build_commands: set type, name and nsects of a
3123 segment. */
3124
3125 static void
3126 bfd_mach_o_init_segment (bfd_mach_o_data_struct *mdata,
3127 bfd_mach_o_load_command *cmd,
3128 const char *segname, unsigned int nbr_sect)
3129 {
3130 bfd_mach_o_segment_command *seg = &cmd->command.segment;
3131 unsigned wide = mach_o_wide_p (&mdata->header);
3132
3133 /* Init segment command. */
3134 cmd->type = wide ? BFD_MACH_O_LC_SEGMENT_64 : BFD_MACH_O_LC_SEGMENT;
3135 cmd->type_required = FALSE;
3136
3137 strcpy (seg->segname, segname);
3138 seg->nsects = nbr_sect;
3139
3140 seg->vmaddr = 0;
3141 seg->vmsize = 0;
3142
3143 seg->fileoff = 0;
3144 seg->filesize = 0;
3145 seg->maxprot = 0;
3146 seg->initprot = 0;
3147 seg->flags = 0;
3148 seg->sect_head = NULL;
3149 seg->sect_tail = NULL;
3150 }
3151
3152 /* Build Mach-O load commands (currently assuming an MH_OBJECT file).
3153 TODO: Other file formats, rebuilding symtab/dysymtab commands for strip
3154 and copy functionality. */
3155
3156 bfd_boolean
3157 bfd_mach_o_build_commands (bfd *abfd)
3158 {
3159 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3160 unsigned wide = mach_o_wide_p (&mdata->header);
3161 unsigned int nbr_segcmd = 0;
3162 bfd_mach_o_load_command *commands;
3163 unsigned int nbr_commands;
3164 int symtab_idx = -1;
3165 int dysymtab_idx = -1;
3166 int main_idx = -1;
3167 unsigned int i;
3168
3169 /* Return now if already built. */
3170 if (mdata->header.ncmds != 0)
3171 return TRUE;
3172
3173 /* Fill in the file type, if not already set. */
3174 if (mdata->header.filetype == 0)
3175 {
3176 if (abfd->flags & EXEC_P)
3177 mdata->header.filetype = BFD_MACH_O_MH_EXECUTE;
3178 else if (abfd->flags & DYNAMIC)
3179 mdata->header.filetype = BFD_MACH_O_MH_DYLIB;
3180 else
3181 mdata->header.filetype = BFD_MACH_O_MH_OBJECT;
3182 }
3183
3184 /* If hasn't already been done, flatten sections list, and sort
3185 if/when required. Must be done before the symbol table is adjusted,
3186 since that depends on properly numbered sections. */
3187 if (mdata->nsects == 0 || mdata->sections == NULL)
3188 if (! bfd_mach_o_mangle_sections (abfd, mdata))
3189 return FALSE;
3190
3191 /* Order the symbol table, fill-in/check mach-o specific fields and
3192 partition out any indirect symbols. */
3193 if (!bfd_mach_o_mangle_symbols (abfd))
3194 return FALSE;
3195
3196 /* Segment commands. */
3197 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT)
3198 {
3199 /* Only one segment for all the sections. But the segment is
3200 optional if there is no sections. */
3201 nbr_segcmd = (mdata->nsects > 0) ? 1 : 0;
3202 }
3203 else
3204 {
3205 bfd_mach_o_section *prev_sect = NULL;
3206
3207 /* One pagezero segment and one linkedit segment. */
3208 nbr_segcmd = 2;
3209
3210 /* Create one segment for associated segment name in sections.
3211 Assume that sections with the same segment name are consecutive. */
3212 for (i = 0; i < mdata->nsects; i++)
3213 {
3214 bfd_mach_o_section *this_sect = mdata->sections[i];
3215
3216 if (prev_sect == NULL
3217 || strcmp (prev_sect->segname, this_sect->segname) != 0)
3218 {
3219 nbr_segcmd++;
3220 prev_sect = this_sect;
3221 }
3222 }
3223 }
3224
3225 nbr_commands = nbr_segcmd;
3226
3227 /* One command for the symbol table (only if there are symbols. */
3228 if (bfd_get_symcount (abfd) > 0)
3229 symtab_idx = nbr_commands++;
3230
3231 /* FIXME:
3232 This is a rather crude test for whether we should build a dysymtab. */
3233 if (bfd_mach_o_should_emit_dysymtab ()
3234 && bfd_get_symcount (abfd))
3235 {
3236 /* If there should be a case where a dysymtab could be emitted without
3237 a symtab (seems improbable), this would need amending. */
3238 dysymtab_idx = nbr_commands++;
3239 }
3240
3241 /* Add an entry point command. */
3242 if (mdata->header.filetype == BFD_MACH_O_MH_EXECUTE
3243 && bfd_get_start_address (abfd) != 0)
3244 main_idx = nbr_commands++;
3245
3246 /* Well, we must have a header, at least. */
3247 mdata->filelen = wide ? BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
3248
3249 /* A bit unusual, but no content is valid;
3250 as -n empty.s -o empty.o */
3251 if (nbr_commands == 0)
3252 {
3253 /* Layout commands (well none...) and set headers command fields. */
3254 return bfd_mach_o_layout_commands (mdata);
3255 }
3256
3257 /* Create commands for segments (and symtabs), prepend them. */
3258 commands = bfd_zalloc (abfd, nbr_commands * sizeof (bfd_mach_o_load_command));
3259 if (commands == NULL)
3260 return FALSE;
3261 for (i = 0; i < nbr_commands - 1; i++)
3262 commands[i].next = &commands[i + 1];
3263 commands[nbr_commands - 1].next = mdata->first_command;
3264 if (mdata->first_command == NULL)
3265 mdata->last_command = &commands[nbr_commands - 1];
3266 mdata->first_command = &commands[0];
3267
3268 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT && nbr_segcmd != 0)
3269 {
3270 /* For object file, there is only one segment. */
3271 bfd_mach_o_init_segment (mdata, &commands[0], "", mdata->nsects);
3272 }
3273 else if (nbr_segcmd != 0)
3274 {
3275 bfd_mach_o_load_command *cmd;
3276
3277 BFD_ASSERT (nbr_segcmd >= 2);
3278
3279 /* The pagezero. */
3280 cmd = &commands[0];
3281 bfd_mach_o_init_segment (mdata, cmd, "__PAGEZERO", 0);
3282
3283 /* Segments from sections. */
3284 cmd++;
3285 for (i = 0; i < mdata->nsects;)
3286 {
3287 const char *segname = mdata->sections[i]->segname;
3288 unsigned int nbr_sect = 1;
3289
3290 /* Count number of sections for this segment. */
3291 for (i++; i < mdata->nsects; i++)
3292 if (strcmp (mdata->sections[i]->segname, segname) == 0)
3293 nbr_sect++;
3294 else
3295 break;
3296
3297 bfd_mach_o_init_segment (mdata, cmd, segname, nbr_sect);
3298 cmd++;
3299 }
3300
3301 /* The linkedit. */
3302 bfd_mach_o_init_segment (mdata, cmd, "__LINKEDIT", 0);
3303 }
3304
3305 if (symtab_idx >= 0)
3306 {
3307 /* Init symtab command. */
3308 bfd_mach_o_load_command *cmd = &commands[symtab_idx];
3309
3310 cmd->type = BFD_MACH_O_LC_SYMTAB;
3311 cmd->type_required = FALSE;
3312 }
3313
3314 /* If required, setup symtab command, see comment above about the quality
3315 of this test. */
3316 if (dysymtab_idx >= 0)
3317 {
3318 bfd_mach_o_load_command *cmd = &commands[dysymtab_idx];
3319
3320 cmd->type = BFD_MACH_O_LC_DYSYMTAB;
3321 cmd->type_required = FALSE;
3322 }
3323
3324 /* Create the main command. */
3325 if (main_idx >= 0)
3326 {
3327 bfd_mach_o_load_command *cmd = &commands[main_idx];
3328
3329 cmd->type = BFD_MACH_O_LC_MAIN;
3330 cmd->type_required = TRUE;
3331
3332 cmd->command.main.entryoff = 0;
3333 cmd->command.main.stacksize = 0;
3334 }
3335
3336 /* Layout commands. */
3337 if (! bfd_mach_o_layout_commands (mdata))
3338 return FALSE;
3339
3340 /* So, now we have sized the commands and the filelen set to that.
3341 Now we can build the segment command and set the section file offsets. */
3342 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT)
3343 {
3344 for (i = 0; i < nbr_segcmd; i++)
3345 if (!bfd_mach_o_build_obj_seg_command
3346 (abfd, &commands[i].command.segment))
3347 return FALSE;
3348 }
3349 else
3350 {
3351 bfd_vma maxvma = 0;
3352
3353 /* Skip pagezero and linkedit segments. */
3354 for (i = 1; i < nbr_segcmd - 1; i++)
3355 {
3356 bfd_mach_o_segment_command *seg = &commands[i].command.segment;
3357
3358 if (!bfd_mach_o_build_exec_seg_command (abfd, seg))
3359 return FALSE;
3360
3361 if (seg->vmaddr + seg->vmsize > maxvma)
3362 maxvma = seg->vmaddr + seg->vmsize;
3363 }
3364
3365 /* Set the size of __PAGEZERO. */
3366 commands[0].command.segment.vmsize =
3367 commands[1].command.segment.vmaddr;
3368
3369 /* Set the vma and fileoff of __LINKEDIT. */
3370 commands[nbr_segcmd - 1].command.segment.vmaddr = maxvma;
3371 commands[nbr_segcmd - 1].command.segment.fileoff = mdata->filelen;
3372
3373 /* Set entry point (once segments have been laid out). */
3374 if (main_idx >= 0)
3375 commands[main_idx].command.main.entryoff =
3376 bfd_get_start_address (abfd) - commands[1].command.segment.vmaddr;
3377 }
3378
3379 return TRUE;
3380 }
3381
3382 /* Set the contents of a section. */
3383
3384 bfd_boolean
3385 bfd_mach_o_set_section_contents (bfd *abfd,
3386 asection *section,
3387 const void * location,
3388 file_ptr offset,
3389 bfd_size_type count)
3390 {
3391 file_ptr pos;
3392
3393 /* Trying to write the first section contents will trigger the creation of
3394 the load commands if they are not already present. */
3395 if (!abfd->output_has_begun && !bfd_mach_o_build_commands (abfd))
3396 return FALSE;
3397
3398 if (count == 0)
3399 return TRUE;
3400
3401 pos = section->filepos + offset;
3402 if (bfd_seek (abfd, pos, SEEK_SET) != 0
3403 || bfd_bwrite (location, count, abfd) != count)
3404 return FALSE;
3405
3406 return TRUE;
3407 }
3408
3409 int
3410 bfd_mach_o_sizeof_headers (bfd *a ATTRIBUTE_UNUSED,
3411 struct bfd_link_info *info ATTRIBUTE_UNUSED)
3412 {
3413 return 0;
3414 }
3415
3416 /* Make an empty symbol. This is required only because
3417 bfd_make_section_anyway wants to create a symbol for the section. */
3418
3419 asymbol *
3420 bfd_mach_o_make_empty_symbol (bfd *abfd)
3421 {
3422 asymbol *new_symbol;
3423
3424 new_symbol = bfd_zalloc (abfd, sizeof (bfd_mach_o_asymbol));
3425 if (new_symbol == NULL)
3426 return new_symbol;
3427 new_symbol->the_bfd = abfd;
3428 new_symbol->udata.i = SYM_MACHO_FIELDS_UNSET;
3429 return new_symbol;
3430 }
3431
3432 static bfd_boolean
3433 bfd_mach_o_read_header (bfd *abfd, file_ptr hdr_off, bfd_mach_o_header *header)
3434 {
3435 struct mach_o_header_external raw;
3436 unsigned int size;
3437 bfd_vma (*get32) (const void *) = NULL;
3438
3439 /* Just read the magic number. */
3440 if (bfd_seek (abfd, hdr_off, SEEK_SET) != 0
3441 || bfd_bread (raw.magic, sizeof (raw.magic), abfd) != 4)
3442 return FALSE;
3443
3444 if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC)
3445 {
3446 header->byteorder = BFD_ENDIAN_BIG;
3447 header->magic = BFD_MACH_O_MH_MAGIC;
3448 header->version = 1;
3449 get32 = bfd_getb32;
3450 }
3451 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC)
3452 {
3453 header->byteorder = BFD_ENDIAN_LITTLE;
3454 header->magic = BFD_MACH_O_MH_MAGIC;
3455 header->version = 1;
3456 get32 = bfd_getl32;
3457 }
3458 else if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64)
3459 {
3460 header->byteorder = BFD_ENDIAN_BIG;
3461 header->magic = BFD_MACH_O_MH_MAGIC_64;
3462 header->version = 2;
3463 get32 = bfd_getb32;
3464 }
3465 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64)
3466 {
3467 header->byteorder = BFD_ENDIAN_LITTLE;
3468 header->magic = BFD_MACH_O_MH_MAGIC_64;
3469 header->version = 2;
3470 get32 = bfd_getl32;
3471 }
3472 else
3473 {
3474 header->byteorder = BFD_ENDIAN_UNKNOWN;
3475 return FALSE;
3476 }
3477
3478 /* Once the size of the header is known, read the full header. */
3479 size = mach_o_wide_p (header) ?
3480 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
3481
3482 if (bfd_seek (abfd, hdr_off, SEEK_SET) != 0
3483 || bfd_bread (&raw, size, abfd) != size)
3484 return FALSE;
3485
3486 header->cputype = (*get32) (raw.cputype);
3487 header->cpusubtype = (*get32) (raw.cpusubtype);
3488 header->filetype = (*get32) (raw.filetype);
3489 header->ncmds = (*get32) (raw.ncmds);
3490 header->sizeofcmds = (*get32) (raw.sizeofcmds);
3491 header->flags = (*get32) (raw.flags);
3492
3493 if (mach_o_wide_p (header))
3494 header->reserved = (*get32) (raw.reserved);
3495 else
3496 header->reserved = 0;
3497
3498 return TRUE;
3499 }
3500
3501 bfd_boolean
3502 bfd_mach_o_new_section_hook (bfd *abfd, asection *sec)
3503 {
3504 bfd_mach_o_section *s;
3505 unsigned bfdalign = bfd_section_alignment (sec);
3506
3507 s = bfd_mach_o_get_mach_o_section (sec);
3508 if (s == NULL)
3509 {
3510 flagword bfd_flags;
3511 static const mach_o_section_name_xlat * xlat;
3512
3513 s = (bfd_mach_o_section *) bfd_zalloc (abfd, sizeof (*s));
3514 if (s == NULL)
3515 return FALSE;
3516 sec->used_by_bfd = s;
3517 s->bfdsection = sec;
3518
3519 /* Create the Darwin seg/sect name pair from the bfd name.
3520 If this is a canonical name for which a specific paiting exists
3521 there will also be defined flags, type, attribute and alignment
3522 values. */
3523 xlat = bfd_mach_o_convert_section_name_to_mach_o (abfd, sec, s);
3524 if (xlat != NULL)
3525 {
3526 s->flags = xlat->macho_sectype | xlat->macho_secattr;
3527 s->align = xlat->sectalign > bfdalign ? xlat->sectalign
3528 : bfdalign;
3529 bfd_set_section_alignment (sec, s->align);
3530 bfd_flags = bfd_section_flags (sec);
3531 if (bfd_flags == SEC_NO_FLAGS)
3532 bfd_set_section_flags (sec, xlat->bfd_flags);
3533 }
3534 else
3535 /* Create default flags. */
3536 bfd_mach_o_set_section_flags_from_bfd (abfd, sec);
3537 }
3538
3539 return _bfd_generic_new_section_hook (abfd, sec);
3540 }
3541
3542 static void
3543 bfd_mach_o_init_section_from_mach_o (asection *sec, unsigned long prot)
3544 {
3545 flagword flags;
3546 bfd_mach_o_section *section;
3547
3548 flags = bfd_section_flags (sec);
3549 section = bfd_mach_o_get_mach_o_section (sec);
3550
3551 /* TODO: see if we should use the xlat system for doing this by
3552 preference and fall back to this for unknown sections. */
3553
3554 if (flags == SEC_NO_FLAGS)
3555 {
3556 /* Try to guess flags. */
3557 if (section->flags & BFD_MACH_O_S_ATTR_DEBUG)
3558 flags = SEC_DEBUGGING;
3559 else
3560 {
3561 flags = SEC_ALLOC;
3562 if ((section->flags & BFD_MACH_O_SECTION_TYPE_MASK)
3563 != BFD_MACH_O_S_ZEROFILL)
3564 {
3565 flags |= SEC_LOAD;
3566 if (prot & BFD_MACH_O_PROT_EXECUTE)
3567 flags |= SEC_CODE;
3568 if (prot & BFD_MACH_O_PROT_WRITE)
3569 flags |= SEC_DATA;
3570 else if (prot & BFD_MACH_O_PROT_READ)
3571 flags |= SEC_READONLY;
3572 }
3573 }
3574 }
3575 else
3576 {
3577 if ((flags & SEC_DEBUGGING) == 0)
3578 flags |= SEC_ALLOC;
3579 }
3580
3581 if (section->offset != 0)
3582 flags |= SEC_HAS_CONTENTS;
3583 if (section->nreloc != 0)
3584 flags |= SEC_RELOC;
3585
3586 bfd_set_section_flags (sec, flags);
3587
3588 sec->vma = section->addr;
3589 sec->lma = section->addr;
3590 sec->size = section->size;
3591 sec->filepos = section->offset;
3592 sec->alignment_power = section->align;
3593 sec->segment_mark = 0;
3594 sec->reloc_count = section->nreloc;
3595 sec->rel_filepos = section->reloff;
3596 }
3597
3598 static asection *
3599 bfd_mach_o_make_bfd_section (bfd *abfd,
3600 const unsigned char *segname,
3601 const unsigned char *sectname)
3602 {
3603 const char *sname;
3604 flagword flags;
3605
3606 bfd_mach_o_convert_section_name_to_bfd
3607 (abfd, (const char *)segname, (const char *)sectname, &sname, &flags);
3608 if (sname == NULL)
3609 return NULL;
3610
3611 return bfd_make_section_anyway_with_flags (abfd, sname, flags);
3612 }
3613
3614 static asection *
3615 bfd_mach_o_read_section_32 (bfd *abfd, unsigned long prot)
3616 {
3617 struct mach_o_section_32_external raw;
3618 asection *sec;
3619 bfd_mach_o_section *section;
3620
3621 if (bfd_bread (&raw, BFD_MACH_O_SECTION_SIZE, abfd)
3622 != BFD_MACH_O_SECTION_SIZE)
3623 return NULL;
3624
3625 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname);
3626 if (sec == NULL)
3627 return NULL;
3628
3629 section = bfd_mach_o_get_mach_o_section (sec);
3630 memcpy (section->segname, raw.segname, sizeof (raw.segname));
3631 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0;
3632 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname));
3633 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0;
3634 section->addr = bfd_h_get_32 (abfd, raw.addr);
3635 section->size = bfd_h_get_32 (abfd, raw.size);
3636 section->offset = bfd_h_get_32 (abfd, raw.offset);
3637 section->align = bfd_h_get_32 (abfd, raw.align);
3638 /* PR 17512: file: 0017eb76. */
3639 if (section->align > 64)
3640 {
3641 _bfd_error_handler
3642 (_("bfd_mach_o_read_section_32: overlarge alignment value: %#lx, "
3643 "using 32 instead"), section->align);
3644 section->align = 32;
3645 }
3646 section->reloff = bfd_h_get_32 (abfd, raw.reloff);
3647 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc);
3648 section->flags = bfd_h_get_32 (abfd, raw.flags);
3649 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1);
3650 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2);
3651 section->reserved3 = 0;
3652
3653 bfd_mach_o_init_section_from_mach_o (sec, prot);
3654
3655 return sec;
3656 }
3657
3658 static asection *
3659 bfd_mach_o_read_section_64 (bfd *abfd, unsigned long prot)
3660 {
3661 struct mach_o_section_64_external raw;
3662 asection *sec;
3663 bfd_mach_o_section *section;
3664
3665 if (bfd_bread (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd)
3666 != BFD_MACH_O_SECTION_64_SIZE)
3667 return NULL;
3668
3669 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname);
3670 if (sec == NULL)
3671 return NULL;
3672
3673 section = bfd_mach_o_get_mach_o_section (sec);
3674 memcpy (section->segname, raw.segname, sizeof (raw.segname));
3675 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0;
3676 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname));
3677 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0;
3678 section->addr = bfd_h_get_64 (abfd, raw.addr);
3679 section->size = bfd_h_get_64 (abfd, raw.size);
3680 section->offset = bfd_h_get_32 (abfd, raw.offset);
3681 section->align = bfd_h_get_32 (abfd, raw.align);
3682 if (section->align > 64)
3683 {
3684 _bfd_error_handler
3685 (_("bfd_mach_o_read_section_64: overlarge alignment value: %#lx, "
3686 "using 32 instead"), section->align);
3687 section->align = 32;
3688 }
3689 section->reloff = bfd_h_get_32 (abfd, raw.reloff);
3690 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc);
3691 section->flags = bfd_h_get_32 (abfd, raw.flags);
3692 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1);
3693 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2);
3694 section->reserved3 = bfd_h_get_32 (abfd, raw.reserved3);
3695
3696 bfd_mach_o_init_section_from_mach_o (sec, prot);
3697
3698 return sec;
3699 }
3700
3701 static asection *
3702 bfd_mach_o_read_section (bfd *abfd, unsigned long prot, unsigned int wide)
3703 {
3704 if (wide)
3705 return bfd_mach_o_read_section_64 (abfd, prot);
3706 else
3707 return bfd_mach_o_read_section_32 (abfd, prot);
3708 }
3709
3710 static bfd_boolean
3711 bfd_mach_o_read_symtab_symbol (bfd *abfd,
3712 bfd_mach_o_symtab_command *sym,
3713 bfd_mach_o_asymbol *s,
3714 unsigned long i)
3715 {
3716 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3717 unsigned int wide = mach_o_wide_p (&mdata->header);
3718 unsigned int symwidth =
3719 wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE;
3720 unsigned int symoff = sym->symoff + (i * symwidth);
3721 struct mach_o_nlist_64_external raw;
3722 unsigned char type = -1;
3723 unsigned char section = -1;
3724 short desc = -1;
3725 symvalue value = -1;
3726 unsigned long stroff = -1;
3727 unsigned int symtype = -1;
3728
3729 BFD_ASSERT (sym->strtab != NULL);
3730
3731 if (bfd_seek (abfd, symoff, SEEK_SET) != 0
3732 || bfd_bread (&raw, symwidth, abfd) != symwidth)
3733 {
3734 _bfd_error_handler
3735 /* xgettext:c-format */
3736 (_("bfd_mach_o_read_symtab_symbol: unable to read %d bytes at %u"),
3737 symwidth, symoff);
3738 return FALSE;
3739 }
3740
3741 stroff = bfd_h_get_32 (abfd, raw.n_strx);
3742 type = bfd_h_get_8 (abfd, raw.n_type);
3743 symtype = type & BFD_MACH_O_N_TYPE;
3744 section = bfd_h_get_8 (abfd, raw.n_sect);
3745 desc = bfd_h_get_16 (abfd, raw.n_desc);
3746 if (wide)
3747 value = bfd_h_get_64 (abfd, raw.n_value);
3748 else
3749 value = bfd_h_get_32 (abfd, raw.n_value);
3750
3751 if (stroff >= sym->strsize)
3752 {
3753 _bfd_error_handler
3754 /* xgettext:c-format */
3755 (_("bfd_mach_o_read_symtab_symbol: name out of range (%lu >= %u)"),
3756 stroff,
3757 sym->strsize);
3758 return FALSE;
3759 }
3760
3761 s->symbol.the_bfd = abfd;
3762 s->symbol.name = sym->strtab + stroff;
3763 s->symbol.value = value;
3764 s->symbol.flags = 0x0;
3765 s->symbol.udata.i = i;
3766 s->n_type = type;
3767 s->n_sect = section;
3768 s->n_desc = desc;
3769
3770 if (type & BFD_MACH_O_N_STAB)
3771 {
3772 s->symbol.flags |= BSF_DEBUGGING;
3773 s->symbol.section = bfd_und_section_ptr;
3774 switch (type)
3775 {
3776 case N_FUN:
3777 case N_STSYM:
3778 case N_LCSYM:
3779 case N_BNSYM:
3780 case N_SLINE:
3781 case N_ENSYM:
3782 case N_ECOMM:
3783 case N_ECOML:
3784 case N_GSYM:
3785 if ((section > 0) && (section <= mdata->nsects))
3786 {
3787 s->symbol.section = mdata->sections[section - 1]->bfdsection;
3788 s->symbol.value =
3789 s->symbol.value - mdata->sections[section - 1]->addr;
3790 }
3791 break;
3792 }
3793 }
3794 else
3795 {
3796 if (type & (BFD_MACH_O_N_PEXT | BFD_MACH_O_N_EXT))
3797 s->symbol.flags |= BSF_GLOBAL;
3798 else
3799 s->symbol.flags |= BSF_LOCAL;
3800
3801 switch (symtype)
3802 {
3803 case BFD_MACH_O_N_UNDF:
3804 if (type == (BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT)
3805 && s->symbol.value != 0)
3806 {
3807 /* A common symbol. */
3808 s->symbol.section = bfd_com_section_ptr;
3809 s->symbol.flags = BSF_NO_FLAGS;
3810 }
3811 else
3812 {
3813 s->symbol.section = bfd_und_section_ptr;
3814 if (s->n_desc & BFD_MACH_O_N_WEAK_REF)
3815 s->symbol.flags |= BSF_WEAK;
3816 }
3817 break;
3818 case BFD_MACH_O_N_PBUD:
3819 s->symbol.section = bfd_und_section_ptr;
3820 break;
3821 case BFD_MACH_O_N_ABS:
3822 s->symbol.section = bfd_abs_section_ptr;
3823 break;
3824 case BFD_MACH_O_N_SECT:
3825 if ((section > 0) && (section <= mdata->nsects))
3826 {
3827 s->symbol.section = mdata->sections[section - 1]->bfdsection;
3828 s->symbol.value =
3829 s->symbol.value - mdata->sections[section - 1]->addr;
3830 }
3831 else
3832 {
3833 /* Mach-O uses 0 to mean "no section"; not an error. */
3834 if (section != 0)
3835 {
3836 _bfd_error_handler
3837 /* xgettext:c-format */
3838 (_("bfd_mach_o_read_symtab_symbol: "
3839 "symbol \"%s\" specified invalid section %d (max %lu): "
3840 "setting to undefined"),
3841 s->symbol.name, section, mdata->nsects);
3842 }
3843 s->symbol.section = bfd_und_section_ptr;
3844 }
3845 break;
3846 case BFD_MACH_O_N_INDR:
3847 /* FIXME: we don't follow the BFD convention as this indirect symbol
3848 won't be followed by the referenced one. This looks harmless
3849 unless we start using the linker. */
3850 s->symbol.flags |= BSF_INDIRECT;
3851 s->symbol.section = bfd_ind_section_ptr;
3852 s->symbol.value = 0;
3853 break;
3854 default:
3855 _bfd_error_handler
3856 /* xgettext:c-format */
3857 (_("bfd_mach_o_read_symtab_symbol: "
3858 "symbol \"%s\" specified invalid type field 0x%x: "
3859 "setting to undefined"), s->symbol.name, symtype);
3860 s->symbol.section = bfd_und_section_ptr;
3861 break;
3862 }
3863 }
3864
3865 return TRUE;
3866 }
3867
3868 bfd_boolean
3869 bfd_mach_o_read_symtab_strtab (bfd *abfd)
3870 {
3871 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3872 bfd_mach_o_symtab_command *sym = mdata->symtab;
3873
3874 /* Fail if there is no symtab. */
3875 if (sym == NULL)
3876 return FALSE;
3877
3878 /* Success if already loaded. */
3879 if (sym->strtab)
3880 return TRUE;
3881
3882 if (abfd->flags & BFD_IN_MEMORY)
3883 {
3884 struct bfd_in_memory *b;
3885
3886 b = (struct bfd_in_memory *) abfd->iostream;
3887
3888 if ((sym->stroff + sym->strsize) > b->size)
3889 {
3890 bfd_set_error (bfd_error_file_truncated);
3891 return FALSE;
3892 }
3893 sym->strtab = (char *) b->buffer + sym->stroff;
3894 }
3895 else
3896 {
3897 /* See PR 21840 for a reproducer. */
3898 if ((sym->strsize + 1) == 0)
3899 return FALSE;
3900 sym->strtab = bfd_alloc (abfd, sym->strsize + 1);
3901 if (sym->strtab == NULL)
3902 return FALSE;
3903
3904 if (bfd_seek (abfd, sym->stroff, SEEK_SET) != 0
3905 || bfd_bread (sym->strtab, sym->strsize, abfd) != sym->strsize)
3906 {
3907 /* PR 17512: file: 10888-1609-0.004. */
3908 bfd_release (abfd, sym->strtab);
3909 sym->strtab = NULL;
3910 bfd_set_error (bfd_error_file_truncated);
3911 return FALSE;
3912 }
3913 /* Zero terminate the string table. */
3914 sym->strtab[sym->strsize] = 0;
3915 }
3916
3917 return TRUE;
3918 }
3919
3920 bfd_boolean
3921 bfd_mach_o_read_symtab_symbols (bfd *abfd)
3922 {
3923 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3924 bfd_mach_o_symtab_command *sym = mdata->symtab;
3925 unsigned long i;
3926
3927 if (sym == NULL || sym->symbols)
3928 /* Return now if there are no symbols or if already loaded. */
3929 return TRUE;
3930
3931 sym->symbols = bfd_alloc2 (abfd, sym->nsyms, sizeof (bfd_mach_o_asymbol));
3932 if (sym->symbols == NULL)
3933 {
3934 _bfd_error_handler (_("bfd_mach_o_read_symtab_symbols: "
3935 "unable to allocate memory for symbols"));
3936 sym->nsyms = 0;
3937 return FALSE;
3938 }
3939
3940 if (!bfd_mach_o_read_symtab_strtab (abfd))
3941 goto fail;
3942
3943 for (i = 0; i < sym->nsyms; i++)
3944 if (!bfd_mach_o_read_symtab_symbol (abfd, sym, &sym->symbols[i], i))
3945 goto fail;
3946
3947 return TRUE;
3948
3949 fail:
3950 bfd_release (abfd, sym->symbols);
3951 sym->symbols = NULL;
3952 sym->nsyms = 0;
3953 return FALSE;
3954 }
3955
3956 static const char *
3957 bfd_mach_o_i386_flavour_string (unsigned int flavour)
3958 {
3959 switch ((int) flavour)
3960 {
3961 case BFD_MACH_O_x86_THREAD_STATE32: return "x86_THREAD_STATE32";
3962 case BFD_MACH_O_x86_FLOAT_STATE32: return "x86_FLOAT_STATE32";
3963 case BFD_MACH_O_x86_EXCEPTION_STATE32: return "x86_EXCEPTION_STATE32";
3964 case BFD_MACH_O_x86_THREAD_STATE64: return "x86_THREAD_STATE64";
3965 case BFD_MACH_O_x86_FLOAT_STATE64: return "x86_FLOAT_STATE64";
3966 case BFD_MACH_O_x86_EXCEPTION_STATE64: return "x86_EXCEPTION_STATE64";
3967 case BFD_MACH_O_x86_THREAD_STATE: return "x86_THREAD_STATE";
3968 case BFD_MACH_O_x86_FLOAT_STATE: return "x86_FLOAT_STATE";
3969 case BFD_MACH_O_x86_EXCEPTION_STATE: return "x86_EXCEPTION_STATE";
3970 case BFD_MACH_O_x86_DEBUG_STATE32: return "x86_DEBUG_STATE32";
3971 case BFD_MACH_O_x86_DEBUG_STATE64: return "x86_DEBUG_STATE64";
3972 case BFD_MACH_O_x86_DEBUG_STATE: return "x86_DEBUG_STATE";
3973 case BFD_MACH_O_x86_THREAD_STATE_NONE: return "x86_THREAD_STATE_NONE";
3974 default: return "UNKNOWN";
3975 }
3976 }
3977
3978 static const char *
3979 bfd_mach_o_ppc_flavour_string (unsigned int flavour)
3980 {
3981 switch ((int) flavour)
3982 {
3983 case BFD_MACH_O_PPC_THREAD_STATE: return "PPC_THREAD_STATE";
3984 case BFD_MACH_O_PPC_FLOAT_STATE: return "PPC_FLOAT_STATE";
3985 case BFD_MACH_O_PPC_EXCEPTION_STATE: return "PPC_EXCEPTION_STATE";
3986 case BFD_MACH_O_PPC_VECTOR_STATE: return "PPC_VECTOR_STATE";
3987 case BFD_MACH_O_PPC_THREAD_STATE64: return "PPC_THREAD_STATE64";
3988 case BFD_MACH_O_PPC_EXCEPTION_STATE64: return "PPC_EXCEPTION_STATE64";
3989 default: return "UNKNOWN";
3990 }
3991 }
3992
3993 static bfd_boolean
3994 bfd_mach_o_read_dylinker (bfd *abfd, bfd_mach_o_load_command *command)
3995 {
3996 bfd_mach_o_dylinker_command *cmd = &command->command.dylinker;
3997 struct mach_o_str_command_external raw;
3998 unsigned int nameoff;
3999 unsigned int namelen;
4000
4001 if (command->len < sizeof (raw) + 8)
4002 return FALSE;
4003 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4004 return FALSE;
4005
4006 nameoff = bfd_h_get_32 (abfd, raw.str);
4007 if (nameoff > command->len)
4008 return FALSE;
4009
4010 cmd->name_offset = nameoff;
4011 namelen = command->len - nameoff;
4012 nameoff += command->offset;
4013 cmd->name_str = bfd_alloc (abfd, namelen);
4014 if (cmd->name_str == NULL)
4015 return FALSE;
4016 if (bfd_seek (abfd, nameoff, SEEK_SET) != 0
4017 || bfd_bread (cmd->name_str, namelen, abfd) != namelen)
4018 return FALSE;
4019 return TRUE;
4020 }
4021
4022 static bfd_boolean
4023 bfd_mach_o_read_dylib (bfd *abfd, bfd_mach_o_load_command *command)
4024 {
4025 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4026 bfd_mach_o_dylib_command *cmd = &command->command.dylib;
4027 struct mach_o_dylib_command_external raw;
4028 unsigned int nameoff;
4029 unsigned int namelen;
4030
4031 if (command->len < sizeof (raw) + 8)
4032 return FALSE;
4033 switch (command->type)
4034 {
4035 case BFD_MACH_O_LC_LOAD_DYLIB:
4036 case BFD_MACH_O_LC_LAZY_LOAD_DYLIB:
4037 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
4038 case BFD_MACH_O_LC_ID_DYLIB:
4039 case BFD_MACH_O_LC_REEXPORT_DYLIB:
4040 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
4041 break;
4042 default:
4043 BFD_FAIL ();
4044 return FALSE;
4045 }
4046
4047 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4048 return FALSE;
4049
4050 nameoff = bfd_h_get_32 (abfd, raw.name);
4051 if (nameoff > command->len)
4052 return FALSE;
4053 cmd->timestamp = bfd_h_get_32 (abfd, raw.timestamp);
4054 cmd->current_version = bfd_h_get_32 (abfd, raw.current_version);
4055 cmd->compatibility_version = bfd_h_get_32 (abfd, raw.compatibility_version);
4056
4057 cmd->name_offset = command->offset + nameoff;
4058 namelen = command->len - nameoff;
4059 cmd->name_str = bfd_alloc (abfd, namelen);
4060 if (cmd->name_str == NULL)
4061 return FALSE;
4062 if (bfd_seek (abfd, mdata->hdr_offset + cmd->name_offset, SEEK_SET) != 0
4063 || bfd_bread (cmd->name_str, namelen, abfd) != namelen)
4064 return FALSE;
4065 return TRUE;
4066 }
4067
4068 static bfd_boolean
4069 bfd_mach_o_read_prebound_dylib (bfd *abfd,
4070 bfd_mach_o_load_command *command)
4071 {
4072 bfd_mach_o_prebound_dylib_command *cmd = &command->command.prebound_dylib;
4073 struct mach_o_prebound_dylib_command_external raw;
4074 unsigned int nameoff;
4075 unsigned int modoff;
4076 unsigned int str_len;
4077 unsigned char *str;
4078
4079 if (command->len < sizeof (raw) + 8)
4080 return FALSE;
4081 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4082 return FALSE;
4083
4084 nameoff = bfd_h_get_32 (abfd, raw.name);
4085 modoff = bfd_h_get_32 (abfd, raw.linked_modules);
4086 if (nameoff > command->len || modoff > command->len)
4087 return FALSE;
4088
4089 str_len = command->len - sizeof (raw);
4090 str = bfd_alloc (abfd, str_len);
4091 if (str == NULL)
4092 return FALSE;
4093 if (bfd_bread (str, str_len, abfd) != str_len)
4094 return FALSE;
4095
4096 cmd->name_offset = command->offset + nameoff;
4097 cmd->nmodules = bfd_h_get_32 (abfd, raw.nmodules);
4098 cmd->linked_modules_offset = command->offset + modoff;
4099
4100 cmd->name_str = (char *)str + nameoff - (sizeof (raw) + BFD_MACH_O_LC_SIZE);
4101 cmd->linked_modules = str + modoff - (sizeof (raw) + BFD_MACH_O_LC_SIZE);
4102 return TRUE;
4103 }
4104
4105 static bfd_boolean
4106 bfd_mach_o_read_prebind_cksum (bfd *abfd,
4107 bfd_mach_o_load_command *command)
4108 {
4109 bfd_mach_o_prebind_cksum_command *cmd = &command->command.prebind_cksum;
4110 struct mach_o_prebind_cksum_command_external raw;
4111
4112 if (command->len < sizeof (raw) + 8)
4113 return FALSE;
4114 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4115 return FALSE;
4116
4117 cmd->cksum = bfd_get_32 (abfd, raw.cksum);
4118 return TRUE;
4119 }
4120
4121 static bfd_boolean
4122 bfd_mach_o_read_twolevel_hints (bfd *abfd,
4123 bfd_mach_o_load_command *command)
4124 {
4125 bfd_mach_o_twolevel_hints_command *cmd = &command->command.twolevel_hints;
4126 struct mach_o_twolevel_hints_command_external raw;
4127
4128 if (command->len < sizeof (raw) + 8)
4129 return FALSE;
4130 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4131 return FALSE;
4132
4133 cmd->offset = bfd_get_32 (abfd, raw.offset);
4134 cmd->nhints = bfd_get_32 (abfd, raw.nhints);
4135 return TRUE;
4136 }
4137
4138 static bfd_boolean
4139 bfd_mach_o_read_fvmlib (bfd *abfd, bfd_mach_o_load_command *command)
4140 {
4141 bfd_mach_o_fvmlib_command *fvm = &command->command.fvmlib;
4142 struct mach_o_fvmlib_command_external raw;
4143 unsigned int nameoff;
4144 unsigned int namelen;
4145
4146 if (command->len < sizeof (raw) + 8)
4147 return FALSE;
4148 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4149 return FALSE;
4150
4151 nameoff = bfd_h_get_32 (abfd, raw.name);
4152 if (nameoff > command->len)
4153 return FALSE;
4154 fvm->minor_version = bfd_h_get_32 (abfd, raw.minor_version);
4155 fvm->header_addr = bfd_h_get_32 (abfd, raw.header_addr);
4156
4157 fvm->name_offset = command->offset + nameoff;
4158 namelen = command->len - nameoff;
4159 fvm->name_str = bfd_alloc (abfd, namelen);
4160 if (fvm->name_str == NULL)
4161 return FALSE;
4162 if (bfd_seek (abfd, fvm->name_offset, SEEK_SET) != 0
4163 || bfd_bread (fvm->name_str, namelen, abfd) != namelen)
4164 return FALSE;
4165 return TRUE;
4166 }
4167
4168 static bfd_boolean
4169 bfd_mach_o_read_thread (bfd *abfd, bfd_mach_o_load_command *command)
4170 {
4171 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4172 bfd_mach_o_thread_command *cmd = &command->command.thread;
4173 unsigned int offset;
4174 unsigned int nflavours;
4175 unsigned int i;
4176 struct mach_o_thread_command_external raw;
4177
4178 BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD)
4179 || (command->type == BFD_MACH_O_LC_UNIXTHREAD));
4180
4181 /* Count the number of threads. */
4182 offset = 8;
4183 nflavours = 0;
4184 while (offset + sizeof (raw) <= command->len)
4185 {
4186 unsigned int count;
4187
4188 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
4189 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4190 return FALSE;
4191
4192 count = bfd_h_get_32 (abfd, raw.count);
4193 if (count > (unsigned) -1 / 4
4194 || command->len - (offset + sizeof (raw)) < count * 4)
4195 return FALSE;
4196 offset += sizeof (raw) + count * 4;
4197 nflavours++;
4198 }
4199 if (nflavours == 0 || offset != command->len)
4200 return FALSE;
4201
4202 /* Allocate threads. */
4203 cmd->flavours = bfd_alloc2 (abfd, nflavours,
4204 sizeof (bfd_mach_o_thread_flavour));
4205 if (cmd->flavours == NULL)
4206 return FALSE;
4207 cmd->nflavours = nflavours;
4208
4209 offset = 8;
4210 nflavours = 0;
4211 while (offset != command->len)
4212 {
4213 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
4214 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4215 return FALSE;
4216
4217 cmd->flavours[nflavours].flavour = bfd_h_get_32 (abfd, raw.flavour);
4218 cmd->flavours[nflavours].offset = command->offset + offset + sizeof (raw);
4219 cmd->flavours[nflavours].size = bfd_h_get_32 (abfd, raw.count) * 4;
4220 offset += cmd->flavours[nflavours].size + sizeof (raw);
4221 nflavours++;
4222 }
4223
4224 for (i = 0; i < nflavours; i++)
4225 {
4226 asection *bfdsec;
4227 unsigned int snamelen;
4228 char *sname;
4229 const char *flavourstr;
4230 const char *prefix = "LC_THREAD";
4231 unsigned int j = 0;
4232
4233 switch (mdata->header.cputype)
4234 {
4235 case BFD_MACH_O_CPU_TYPE_POWERPC:
4236 case BFD_MACH_O_CPU_TYPE_POWERPC_64:
4237 flavourstr =
4238 bfd_mach_o_ppc_flavour_string (cmd->flavours[i].flavour);
4239 break;
4240 case BFD_MACH_O_CPU_TYPE_I386:
4241 case BFD_MACH_O_CPU_TYPE_X86_64:
4242 flavourstr =
4243 bfd_mach_o_i386_flavour_string (cmd->flavours[i].flavour);
4244 break;
4245 default:
4246 flavourstr = "UNKNOWN_ARCHITECTURE";
4247 break;
4248 }
4249
4250 snamelen = strlen (prefix) + 1 + 20 + 1 + strlen (flavourstr) + 1;
4251 sname = bfd_alloc (abfd, snamelen);
4252 if (sname == NULL)
4253 return FALSE;
4254
4255 for (;;)
4256 {
4257 sprintf (sname, "%s.%s.%u", prefix, flavourstr, j);
4258 if (bfd_get_section_by_name (abfd, sname) == NULL)
4259 break;
4260 j++;
4261 }
4262
4263 bfdsec = bfd_make_section_with_flags (abfd, sname, SEC_HAS_CONTENTS);
4264
4265 bfdsec->vma = 0;
4266 bfdsec->lma = 0;
4267 bfdsec->size = cmd->flavours[i].size;
4268 bfdsec->filepos = cmd->flavours[i].offset;
4269 bfdsec->alignment_power = 0x0;
4270
4271 cmd->section = bfdsec;
4272 }
4273
4274 return TRUE;
4275 }
4276
4277 static bfd_boolean
4278 bfd_mach_o_read_dysymtab (bfd *abfd, bfd_mach_o_load_command *command)
4279 {
4280 bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab;
4281 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4282
4283 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB);
4284
4285 {
4286 struct mach_o_dysymtab_command_external raw;
4287
4288 if (command->len < sizeof (raw) + 8)
4289 return FALSE;
4290 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4291 return FALSE;
4292
4293 cmd->ilocalsym = bfd_h_get_32 (abfd, raw.ilocalsym);
4294 cmd->nlocalsym = bfd_h_get_32 (abfd, raw.nlocalsym);
4295 cmd->iextdefsym = bfd_h_get_32 (abfd, raw.iextdefsym);
4296 cmd->nextdefsym = bfd_h_get_32 (abfd, raw.nextdefsym);
4297 cmd->iundefsym = bfd_h_get_32 (abfd, raw.iundefsym);
4298 cmd->nundefsym = bfd_h_get_32 (abfd, raw.nundefsym);
4299 cmd->tocoff = bfd_h_get_32 (abfd, raw.tocoff);
4300 cmd->ntoc = bfd_h_get_32 (abfd, raw.ntoc);
4301 cmd->modtaboff = bfd_h_get_32 (abfd, raw.modtaboff);
4302 cmd->nmodtab = bfd_h_get_32 (abfd, raw.nmodtab);
4303 cmd->extrefsymoff = bfd_h_get_32 (abfd, raw.extrefsymoff);
4304 cmd->nextrefsyms = bfd_h_get_32 (abfd, raw.nextrefsyms);
4305 cmd->indirectsymoff = bfd_h_get_32 (abfd, raw.indirectsymoff);
4306 cmd->nindirectsyms = bfd_h_get_32 (abfd, raw.nindirectsyms);
4307 cmd->extreloff = bfd_h_get_32 (abfd, raw.extreloff);
4308 cmd->nextrel = bfd_h_get_32 (abfd, raw.nextrel);
4309 cmd->locreloff = bfd_h_get_32 (abfd, raw.locreloff);
4310 cmd->nlocrel = bfd_h_get_32 (abfd, raw.nlocrel);
4311 }
4312
4313 if (cmd->nmodtab != 0)
4314 {
4315 unsigned int i;
4316 int wide = bfd_mach_o_wide_p (abfd);
4317 unsigned int module_len = wide ? 56 : 52;
4318
4319 cmd->dylib_module =
4320 bfd_alloc2 (abfd, cmd->nmodtab, sizeof (bfd_mach_o_dylib_module));
4321 if (cmd->dylib_module == NULL)
4322 return FALSE;
4323
4324 if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0)
4325 return FALSE;
4326
4327 for (i = 0; i < cmd->nmodtab; i++)
4328 {
4329 bfd_mach_o_dylib_module *module = &cmd->dylib_module[i];
4330 unsigned long v;
4331 unsigned char buf[56];
4332
4333 if (bfd_bread ((void *) buf, module_len, abfd) != module_len)
4334 return FALSE;
4335
4336 module->module_name_idx = bfd_h_get_32 (abfd, buf + 0);
4337 module->iextdefsym = bfd_h_get_32 (abfd, buf + 4);
4338 module->nextdefsym = bfd_h_get_32 (abfd, buf + 8);
4339 module->irefsym = bfd_h_get_32 (abfd, buf + 12);
4340 module->nrefsym = bfd_h_get_32 (abfd, buf + 16);
4341 module->ilocalsym = bfd_h_get_32 (abfd, buf + 20);
4342 module->nlocalsym = bfd_h_get_32 (abfd, buf + 24);
4343 module->iextrel = bfd_h_get_32 (abfd, buf + 28);
4344 module->nextrel = bfd_h_get_32 (abfd, buf + 32);
4345 v = bfd_h_get_32 (abfd, buf +36);
4346 module->iinit = v & 0xffff;
4347 module->iterm = (v >> 16) & 0xffff;
4348 v = bfd_h_get_32 (abfd, buf + 40);
4349 module->ninit = v & 0xffff;
4350 module->nterm = (v >> 16) & 0xffff;
4351 if (wide)
4352 {
4353 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 44);
4354 module->objc_module_info_addr = bfd_h_get_64 (abfd, buf + 48);
4355 }
4356 else
4357 {
4358 module->objc_module_info_addr = bfd_h_get_32 (abfd, buf + 44);
4359 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 48);
4360 }
4361 }
4362 }
4363
4364 if (cmd->ntoc != 0)
4365 {
4366 unsigned long i;
4367
4368 cmd->dylib_toc = bfd_alloc2
4369 (abfd, cmd->ntoc, sizeof (bfd_mach_o_dylib_table_of_content));
4370 if (cmd->dylib_toc == NULL)
4371 return FALSE;
4372
4373 if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0)
4374 return FALSE;
4375
4376 for (i = 0; i < cmd->ntoc; i++)
4377 {
4378 struct mach_o_dylib_table_of_contents_external raw;
4379 bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i];
4380
4381 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4382 return FALSE;
4383
4384 toc->symbol_index = bfd_h_get_32 (abfd, raw.symbol_index);
4385 toc->module_index = bfd_h_get_32 (abfd, raw.module_index);
4386 }
4387 }
4388
4389 if (cmd->nindirectsyms != 0)
4390 {
4391 unsigned int i;
4392
4393 cmd->indirect_syms = bfd_alloc2
4394 (abfd, cmd->nindirectsyms, sizeof (unsigned int));
4395 if (cmd->indirect_syms == NULL)
4396 return FALSE;
4397
4398 if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0)
4399 return FALSE;
4400
4401 for (i = 0; i < cmd->nindirectsyms; i++)
4402 {
4403 unsigned char raw[4];
4404 unsigned int *is = &cmd->indirect_syms[i];
4405
4406 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw))
4407 return FALSE;
4408
4409 *is = bfd_h_get_32 (abfd, raw);
4410 }
4411 }
4412
4413 if (cmd->nextrefsyms != 0)
4414 {
4415 unsigned long v;
4416 unsigned int i;
4417
4418 cmd->ext_refs = bfd_alloc2
4419 (abfd, cmd->nextrefsyms, sizeof (bfd_mach_o_dylib_reference));
4420 if (cmd->ext_refs == NULL)
4421 return FALSE;
4422
4423 if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0)
4424 return FALSE;
4425
4426 for (i = 0; i < cmd->nextrefsyms; i++)
4427 {
4428 unsigned char raw[4];
4429 bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i];
4430
4431 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw))
4432 return FALSE;
4433
4434 /* Fields isym and flags are written as bit-fields, thus we need
4435 a specific processing for endianness. */
4436 v = bfd_h_get_32 (abfd, raw);
4437 if (bfd_big_endian (abfd))
4438 {
4439 ref->isym = (v >> 8) & 0xffffff;
4440 ref->flags = v & 0xff;
4441 }
4442 else
4443 {
4444 ref->isym = v & 0xffffff;
4445 ref->flags = (v >> 24) & 0xff;
4446 }
4447 }
4448 }
4449
4450 if (mdata->dysymtab)
4451 return FALSE;
4452 mdata->dysymtab = cmd;
4453
4454 return TRUE;
4455 }
4456
4457 static bfd_boolean
4458 bfd_mach_o_read_symtab (bfd *abfd, bfd_mach_o_load_command *command)
4459 {
4460 bfd_mach_o_symtab_command *symtab = &command->command.symtab;
4461 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4462 struct mach_o_symtab_command_external raw;
4463
4464 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB);
4465
4466 if (command->len < sizeof (raw) + 8)
4467 return FALSE;
4468 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4469 return FALSE;
4470
4471 symtab->symoff = bfd_h_get_32 (abfd, raw.symoff);
4472 symtab->nsyms = bfd_h_get_32 (abfd, raw.nsyms);
4473 symtab->stroff = bfd_h_get_32 (abfd, raw.stroff);
4474 symtab->strsize = bfd_h_get_32 (abfd, raw.strsize);
4475 symtab->symbols = NULL;
4476 symtab->strtab = NULL;
4477
4478 if (symtab->nsyms != 0)
4479 abfd->flags |= HAS_SYMS;
4480
4481 if (mdata->symtab)
4482 return FALSE;
4483 mdata->symtab = symtab;
4484 return TRUE;
4485 }
4486
4487 static bfd_boolean
4488 bfd_mach_o_read_uuid (bfd *abfd, bfd_mach_o_load_command *command)
4489 {
4490 bfd_mach_o_uuid_command *cmd = &command->command.uuid;
4491
4492 BFD_ASSERT (command->type == BFD_MACH_O_LC_UUID);
4493
4494 if (command->len < 16 + 8)
4495 return FALSE;
4496 if (bfd_bread (cmd->uuid, 16, abfd) != 16)
4497 return FALSE;
4498
4499 return TRUE;
4500 }
4501
4502 static bfd_boolean
4503 bfd_mach_o_read_linkedit (bfd *abfd, bfd_mach_o_load_command *command)
4504 {
4505 bfd_mach_o_linkedit_command *cmd = &command->command.linkedit;
4506 struct mach_o_linkedit_data_command_external raw;
4507
4508 if (command->len < sizeof (raw) + 8)
4509 return FALSE;
4510 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4511 return FALSE;
4512
4513 cmd->dataoff = bfd_get_32 (abfd, raw.dataoff);
4514 cmd->datasize = bfd_get_32 (abfd, raw.datasize);
4515 return TRUE;
4516 }
4517
4518 static bfd_boolean
4519 bfd_mach_o_read_str (bfd *abfd, bfd_mach_o_load_command *command)
4520 {
4521 bfd_mach_o_str_command *cmd = &command->command.str;
4522 struct mach_o_str_command_external raw;
4523 unsigned long off;
4524
4525 if (command->len < sizeof (raw) + 8)
4526 return FALSE;
4527 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4528 return FALSE;
4529
4530 off = bfd_get_32 (abfd, raw.str);
4531 if (off > command->len)
4532 return FALSE;
4533
4534 cmd->stroff = command->offset + off;
4535 cmd->str_len = command->len - off;
4536 cmd->str = bfd_alloc (abfd, cmd->str_len);
4537 if (cmd->str == NULL)
4538 return FALSE;
4539 if (bfd_seek (abfd, cmd->stroff, SEEK_SET) != 0
4540 || bfd_bread ((void *) cmd->str, cmd->str_len, abfd) != cmd->str_len)
4541 return FALSE;
4542 return TRUE;
4543 }
4544
4545 static unsigned char *
4546 bfd_mach_o_alloc_and_read (bfd *abfd, unsigned int off, unsigned int size)
4547 {
4548 unsigned char *buf;
4549
4550 buf = bfd_alloc (abfd, size);
4551 if (buf == NULL)
4552 return NULL;
4553 if (bfd_seek (abfd, off, SEEK_SET) != 0
4554 || bfd_bread (buf, size, abfd) != size)
4555 return NULL;
4556 return buf;
4557 }
4558
4559 static bfd_boolean
4560 bfd_mach_o_read_dyld_content (bfd *abfd, bfd_mach_o_dyld_info_command *cmd)
4561 {
4562 /* Read rebase content. */
4563 if (cmd->rebase_content == NULL && cmd->rebase_size != 0)
4564 {
4565 cmd->rebase_content =
4566 bfd_mach_o_alloc_and_read (abfd, cmd->rebase_off, cmd->rebase_size);
4567 if (cmd->rebase_content == NULL)
4568 return FALSE;
4569 }
4570
4571 /* Read bind content. */
4572 if (cmd->bind_content == NULL && cmd->bind_size != 0)
4573 {
4574 cmd->bind_content =
4575 bfd_mach_o_alloc_and_read (abfd, cmd->bind_off, cmd->bind_size);
4576 if (cmd->bind_content == NULL)
4577 return FALSE;
4578 }
4579
4580 /* Read weak bind content. */
4581 if (cmd->weak_bind_content == NULL && cmd->weak_bind_size != 0)
4582 {
4583 cmd->weak_bind_content = bfd_mach_o_alloc_and_read
4584 (abfd, cmd->weak_bind_off, cmd->weak_bind_size);
4585 if (cmd->weak_bind_content == NULL)
4586 return FALSE;
4587 }
4588
4589 /* Read lazy bind content. */
4590 if (cmd->lazy_bind_content == NULL && cmd->lazy_bind_size != 0)
4591 {
4592 cmd->lazy_bind_content = bfd_mach_o_alloc_and_read
4593 (abfd, cmd->lazy_bind_off, cmd->lazy_bind_size);
4594 if (cmd->lazy_bind_content == NULL)
4595 return FALSE;
4596 }
4597
4598 /* Read export content. */
4599 if (cmd->export_content == NULL && cmd->export_size != 0)
4600 {
4601 cmd->export_content = bfd_mach_o_alloc_and_read
4602 (abfd, cmd->export_off, cmd->export_size);
4603 if (cmd->export_content == NULL)
4604 return FALSE;
4605 }
4606
4607 return TRUE;
4608 }
4609
4610 static bfd_boolean
4611 bfd_mach_o_read_dyld_info (bfd *abfd, bfd_mach_o_load_command *command)
4612 {
4613 bfd_mach_o_dyld_info_command *cmd = &command->command.dyld_info;
4614 struct mach_o_dyld_info_command_external raw;
4615
4616 if (command->len < sizeof (raw) + 8)
4617 return FALSE;
4618 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4619 return FALSE;
4620
4621 cmd->rebase_off = bfd_get_32 (abfd, raw.rebase_off);
4622 cmd->rebase_size = bfd_get_32 (abfd, raw.rebase_size);
4623 cmd->rebase_content = NULL;
4624 cmd->bind_off = bfd_get_32 (abfd, raw.bind_off);
4625 cmd->bind_size = bfd_get_32 (abfd, raw.bind_size);
4626 cmd->bind_content = NULL;
4627 cmd->weak_bind_off = bfd_get_32 (abfd, raw.weak_bind_off);
4628 cmd->weak_bind_size = bfd_get_32 (abfd, raw.weak_bind_size);
4629 cmd->weak_bind_content = NULL;
4630 cmd->lazy_bind_off = bfd_get_32 (abfd, raw.lazy_bind_off);
4631 cmd->lazy_bind_size = bfd_get_32 (abfd, raw.lazy_bind_size);
4632 cmd->lazy_bind_content = NULL;
4633 cmd->export_off = bfd_get_32 (abfd, raw.export_off);
4634 cmd->export_size = bfd_get_32 (abfd, raw.export_size);
4635 cmd->export_content = NULL;
4636 return TRUE;
4637 }
4638
4639 static bfd_boolean
4640 bfd_mach_o_read_version_min (bfd *abfd, bfd_mach_o_load_command *command)
4641 {
4642 bfd_mach_o_version_min_command *cmd = &command->command.version_min;
4643 struct mach_o_version_min_command_external raw;
4644
4645 if (command->len < sizeof (raw) + 8)
4646 return FALSE;
4647 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4648 return FALSE;
4649
4650 cmd->version = bfd_get_32 (abfd, raw.version);
4651 cmd->sdk = bfd_get_32 (abfd, raw.sdk);
4652 return TRUE;
4653 }
4654
4655 static bfd_boolean
4656 bfd_mach_o_read_encryption_info (bfd *abfd, bfd_mach_o_load_command *command)
4657 {
4658 bfd_mach_o_encryption_info_command *cmd = &command->command.encryption_info;
4659 struct mach_o_encryption_info_command_external raw;
4660
4661 if (command->len < sizeof (raw) + 8)
4662 return FALSE;
4663 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4664 return FALSE;
4665
4666 cmd->cryptoff = bfd_get_32 (abfd, raw.cryptoff);
4667 cmd->cryptsize = bfd_get_32 (abfd, raw.cryptsize);
4668 cmd->cryptid = bfd_get_32 (abfd, raw.cryptid);
4669 return TRUE;
4670 }
4671
4672 static bfd_boolean
4673 bfd_mach_o_read_encryption_info_64 (bfd *abfd, bfd_mach_o_load_command *command)
4674 {
4675 bfd_mach_o_encryption_info_command *cmd = &command->command.encryption_info;
4676 struct mach_o_encryption_info_64_command_external raw;
4677
4678 if (command->len < sizeof (raw) + 8)
4679 return FALSE;
4680 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4681 return FALSE;
4682
4683 cmd->cryptoff = bfd_get_32 (abfd, raw.cryptoff);
4684 cmd->cryptsize = bfd_get_32 (abfd, raw.cryptsize);
4685 cmd->cryptid = bfd_get_32 (abfd, raw.cryptid);
4686 return TRUE;
4687 }
4688
4689 static bfd_boolean
4690 bfd_mach_o_read_main (bfd *abfd, bfd_mach_o_load_command *command)
4691 {
4692 bfd_mach_o_main_command *cmd = &command->command.main;
4693 struct mach_o_entry_point_command_external raw;
4694
4695 if (command->len < sizeof (raw) + 8)
4696 return FALSE;
4697 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4698 return FALSE;
4699
4700 cmd->entryoff = bfd_get_64 (abfd, raw.entryoff);
4701 cmd->stacksize = bfd_get_64 (abfd, raw.stacksize);
4702 return TRUE;
4703 }
4704
4705 static bfd_boolean
4706 bfd_mach_o_read_source_version (bfd *abfd, bfd_mach_o_load_command *command)
4707 {
4708 bfd_mach_o_source_version_command *cmd = &command->command.source_version;
4709 struct mach_o_source_version_command_external raw;
4710 bfd_uint64_t ver;
4711
4712 if (command->len < sizeof (raw) + 8)
4713 return FALSE;
4714 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4715 return FALSE;
4716
4717 ver = bfd_get_64 (abfd, raw.version);
4718 /* Note: we use a serie of shift to avoid shift > 32 (for which gcc
4719 generates warnings) in case of the host doesn't support 64 bit
4720 integers. */
4721 cmd->e = ver & 0x3ff;
4722 ver >>= 10;
4723 cmd->d = ver & 0x3ff;
4724 ver >>= 10;
4725 cmd->c = ver & 0x3ff;
4726 ver >>= 10;
4727 cmd->b = ver & 0x3ff;
4728 ver >>= 10;
4729 cmd->a = ver & 0xffffff;
4730 return TRUE;
4731 }
4732
4733 static bfd_boolean
4734 bfd_mach_o_read_note (bfd *abfd, bfd_mach_o_load_command *command)
4735 {
4736 bfd_mach_o_note_command *cmd = &command->command.note;
4737 struct mach_o_note_command_external raw;
4738
4739 if (command->len < sizeof (raw) + 8)
4740 return FALSE;
4741 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4742 return FALSE;
4743
4744 memcpy (cmd->data_owner, raw.data_owner, 16);
4745 cmd->offset = bfd_get_64 (abfd, raw.offset);
4746 cmd->size = bfd_get_64 (abfd, raw.size);
4747 return TRUE;
4748 }
4749
4750 static bfd_boolean
4751 bfd_mach_o_read_build_version (bfd *abfd, bfd_mach_o_load_command *command)
4752 {
4753 bfd_mach_o_build_version_command *cmd = &command->command.build_version;
4754 struct mach_o_build_version_command_external raw;
4755
4756 if (command->len < sizeof (raw) + 8)
4757 return FALSE;
4758 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4759 return FALSE;
4760
4761 cmd->platform = bfd_get_32 (abfd, raw.platform);
4762 cmd->minos = bfd_get_32 (abfd, raw.minos);
4763 cmd->sdk = bfd_get_32 (abfd, raw.sdk);
4764 cmd->ntools = bfd_get_32 (abfd, raw.ntools);
4765 return TRUE;
4766 }
4767
4768 static bfd_boolean
4769 bfd_mach_o_read_segment (bfd *abfd,
4770 bfd_mach_o_load_command *command,
4771 unsigned int wide)
4772 {
4773 bfd_mach_o_segment_command *seg = &command->command.segment;
4774 unsigned long i;
4775
4776 if (wide)
4777 {
4778 struct mach_o_segment_command_64_external raw;
4779
4780 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64);
4781
4782 if (command->len < sizeof (raw) + 8)
4783 return FALSE;
4784 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4785 return FALSE;
4786
4787 memcpy (seg->segname, raw.segname, 16);
4788 seg->segname[16] = '\0';
4789
4790 seg->vmaddr = bfd_h_get_64 (abfd, raw.vmaddr);
4791 seg->vmsize = bfd_h_get_64 (abfd, raw.vmsize);
4792 seg->fileoff = bfd_h_get_64 (abfd, raw.fileoff);
4793 seg->filesize = bfd_h_get_64 (abfd, raw.filesize);
4794 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot);
4795 seg->initprot = bfd_h_get_32 (abfd, raw.initprot);
4796 seg->nsects = bfd_h_get_32 (abfd, raw.nsects);
4797 seg->flags = bfd_h_get_32 (abfd, raw.flags);
4798 }
4799 else
4800 {
4801 struct mach_o_segment_command_32_external raw;
4802
4803 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT);
4804
4805 if (command->len < sizeof (raw) + 8)
4806 return FALSE;
4807 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4808 return FALSE;
4809
4810 memcpy (seg->segname, raw.segname, 16);
4811 seg->segname[16] = '\0';
4812
4813 seg->vmaddr = bfd_h_get_32 (abfd, raw.vmaddr);
4814 seg->vmsize = bfd_h_get_32 (abfd, raw.vmsize);
4815 seg->fileoff = bfd_h_get_32 (abfd, raw.fileoff);
4816 seg->filesize = bfd_h_get_32 (abfd, raw.filesize);
4817 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot);
4818 seg->initprot = bfd_h_get_32 (abfd, raw.initprot);
4819 seg->nsects = bfd_h_get_32 (abfd, raw.nsects);
4820 seg->flags = bfd_h_get_32 (abfd, raw.flags);
4821 }
4822 seg->sect_head = NULL;
4823 seg->sect_tail = NULL;
4824
4825 for (i = 0; i < seg->nsects; i++)
4826 {
4827 asection *sec;
4828
4829 sec = bfd_mach_o_read_section (abfd, seg->initprot, wide);
4830 if (sec == NULL)
4831 return FALSE;
4832
4833 bfd_mach_o_append_section_to_segment
4834 (seg, bfd_mach_o_get_mach_o_section (sec));
4835 }
4836
4837 return TRUE;
4838 }
4839
4840 static bfd_boolean
4841 bfd_mach_o_read_segment_32 (bfd *abfd, bfd_mach_o_load_command *command)
4842 {
4843 return bfd_mach_o_read_segment (abfd, command, 0);
4844 }
4845
4846 static bfd_boolean
4847 bfd_mach_o_read_segment_64 (bfd *abfd, bfd_mach_o_load_command *command)
4848 {
4849 return bfd_mach_o_read_segment (abfd, command, 1);
4850 }
4851
4852 static bfd_boolean
4853 bfd_mach_o_read_command (bfd *abfd, bfd_mach_o_load_command *command)
4854 {
4855 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4856 struct mach_o_load_command_external raw;
4857 unsigned int cmd;
4858
4859 /* Read command type and length. */
4860 if (bfd_seek (abfd, mdata->hdr_offset + command->offset, SEEK_SET) != 0
4861 || bfd_bread (&raw, BFD_MACH_O_LC_SIZE, abfd) != BFD_MACH_O_LC_SIZE)
4862 return FALSE;
4863
4864 cmd = bfd_h_get_32 (abfd, raw.cmd);
4865 command->type = cmd & ~BFD_MACH_O_LC_REQ_DYLD;
4866 command->type_required = cmd & BFD_MACH_O_LC_REQ_DYLD ? TRUE : FALSE;
4867 command->len = bfd_h_get_32 (abfd, raw.cmdsize);
4868 if (command->len < 8 || command->len % 4 != 0)
4869 return FALSE;
4870
4871 switch (command->type)
4872 {
4873 case BFD_MACH_O_LC_SEGMENT:
4874 if (!bfd_mach_o_read_segment_32 (abfd, command))
4875 return FALSE;
4876 break;
4877 case BFD_MACH_O_LC_SEGMENT_64:
4878 if (!bfd_mach_o_read_segment_64 (abfd, command))
4879 return FALSE;
4880 break;
4881 case BFD_MACH_O_LC_SYMTAB:
4882 if (!bfd_mach_o_read_symtab (abfd, command))
4883 return FALSE;
4884 break;
4885 case BFD_MACH_O_LC_SYMSEG:
4886 break;
4887 case BFD_MACH_O_LC_THREAD:
4888 case BFD_MACH_O_LC_UNIXTHREAD:
4889 if (!bfd_mach_o_read_thread (abfd, command))
4890 return FALSE;
4891 break;
4892 case BFD_MACH_O_LC_LOAD_DYLINKER:
4893 case BFD_MACH_O_LC_ID_DYLINKER:
4894 case BFD_MACH_O_LC_DYLD_ENVIRONMENT:
4895 if (!bfd_mach_o_read_dylinker (abfd, command))
4896 return FALSE;
4897 break;
4898 case BFD_MACH_O_LC_LOAD_DYLIB:
4899 case BFD_MACH_O_LC_LAZY_LOAD_DYLIB:
4900 case BFD_MACH_O_LC_ID_DYLIB:
4901 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
4902 case BFD_MACH_O_LC_REEXPORT_DYLIB:
4903 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
4904 if (!bfd_mach_o_read_dylib (abfd, command))
4905 return FALSE;
4906 break;
4907 case BFD_MACH_O_LC_PREBOUND_DYLIB:
4908 if (!bfd_mach_o_read_prebound_dylib (abfd, command))
4909 return FALSE;
4910 break;
4911 case BFD_MACH_O_LC_LOADFVMLIB:
4912 case BFD_MACH_O_LC_IDFVMLIB:
4913 if (!bfd_mach_o_read_fvmlib (abfd, command))
4914 return FALSE;
4915 break;
4916 case BFD_MACH_O_LC_IDENT:
4917 case BFD_MACH_O_LC_FVMFILE:
4918 case BFD_MACH_O_LC_PREPAGE:
4919 case BFD_MACH_O_LC_ROUTINES:
4920 case BFD_MACH_O_LC_ROUTINES_64:
4921 break;
4922 case BFD_MACH_O_LC_SUB_FRAMEWORK:
4923 case BFD_MACH_O_LC_SUB_UMBRELLA:
4924 case BFD_MACH_O_LC_SUB_LIBRARY:
4925 case BFD_MACH_O_LC_SUB_CLIENT:
4926 case BFD_MACH_O_LC_RPATH:
4927 if (!bfd_mach_o_read_str (abfd, command))
4928 return FALSE;
4929 break;
4930 case BFD_MACH_O_LC_DYSYMTAB:
4931 if (!bfd_mach_o_read_dysymtab (abfd, command))
4932 return FALSE;
4933 break;
4934 case BFD_MACH_O_LC_PREBIND_CKSUM:
4935 if (!bfd_mach_o_read_prebind_cksum (abfd, command))
4936 return FALSE;
4937 break;
4938 case BFD_MACH_O_LC_TWOLEVEL_HINTS:
4939 if (!bfd_mach_o_read_twolevel_hints (abfd, command))
4940 return FALSE;
4941 break;
4942 case BFD_MACH_O_LC_UUID:
4943 if (!bfd_mach_o_read_uuid (abfd, command))
4944 return FALSE;
4945 break;
4946 case BFD_MACH_O_LC_CODE_SIGNATURE:
4947 case BFD_MACH_O_LC_SEGMENT_SPLIT_INFO:
4948 case BFD_MACH_O_LC_FUNCTION_STARTS:
4949 case BFD_MACH_O_LC_DATA_IN_CODE:
4950 case BFD_MACH_O_LC_DYLIB_CODE_SIGN_DRS:
4951 case BFD_MACH_O_LC_LINKER_OPTIMIZATION_HINT:
4952 if (!bfd_mach_o_read_linkedit (abfd, command))
4953 return FALSE;
4954 break;
4955 case BFD_MACH_O_LC_ENCRYPTION_INFO:
4956 if (!bfd_mach_o_read_encryption_info (abfd, command))
4957 return FALSE;
4958 break;
4959 case BFD_MACH_O_LC_ENCRYPTION_INFO_64:
4960 if (!bfd_mach_o_read_encryption_info_64 (abfd, command))
4961 return FALSE;
4962 break;
4963 case BFD_MACH_O_LC_DYLD_INFO:
4964 if (!bfd_mach_o_read_dyld_info (abfd, command))
4965 return FALSE;
4966 break;
4967 case BFD_MACH_O_LC_VERSION_MIN_MACOSX:
4968 case BFD_MACH_O_LC_VERSION_MIN_IPHONEOS:
4969 case BFD_MACH_O_LC_VERSION_MIN_WATCHOS:
4970 case BFD_MACH_O_LC_VERSION_MIN_TVOS:
4971 if (!bfd_mach_o_read_version_min (abfd, command))
4972 return FALSE;
4973 break;
4974 case BFD_MACH_O_LC_MAIN:
4975 if (!bfd_mach_o_read_main (abfd, command))
4976 return FALSE;
4977 break;
4978 case BFD_MACH_O_LC_SOURCE_VERSION:
4979 if (!bfd_mach_o_read_source_version (abfd, command))
4980 return FALSE;
4981 break;
4982 case BFD_MACH_O_LC_LINKER_OPTIONS:
4983 break;
4984 case BFD_MACH_O_LC_NOTE:
4985 if (!bfd_mach_o_read_note (abfd, command))
4986 return FALSE;
4987 break;
4988 case BFD_MACH_O_LC_BUILD_VERSION:
4989 if (!bfd_mach_o_read_build_version (abfd, command))
4990 return FALSE;
4991 break;
4992 default:
4993 command->len = 0;
4994 _bfd_error_handler (_("%pB: unknown load command %#x"),
4995 abfd, command->type);
4996 return FALSE;
4997 }
4998
4999 return TRUE;
5000 }
5001
5002 static void
5003 bfd_mach_o_flatten_sections (bfd *abfd)
5004 {
5005 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5006 bfd_mach_o_load_command *cmd;
5007 long csect = 0;
5008
5009 /* Count total number of sections. */
5010 mdata->nsects = 0;
5011
5012 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5013 {
5014 if (cmd->type == BFD_MACH_O_LC_SEGMENT
5015 || cmd->type == BFD_MACH_O_LC_SEGMENT_64)
5016 {
5017 bfd_mach_o_segment_command *seg = &cmd->command.segment;
5018
5019 mdata->nsects += seg->nsects;
5020 }
5021 }
5022
5023 /* Allocate sections array. */
5024 mdata->sections = bfd_alloc2 (abfd,
5025 mdata->nsects, sizeof (bfd_mach_o_section *));
5026
5027 /* Fill the array. */
5028 csect = 0;
5029
5030 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5031 {
5032 if (cmd->type == BFD_MACH_O_LC_SEGMENT
5033 || cmd->type == BFD_MACH_O_LC_SEGMENT_64)
5034 {
5035 bfd_mach_o_segment_command *seg = &cmd->command.segment;
5036 bfd_mach_o_section *sec;
5037
5038 BFD_ASSERT (csect + seg->nsects <= mdata->nsects);
5039
5040 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
5041 mdata->sections[csect++] = sec;
5042 }
5043 }
5044 }
5045
5046 static bfd_boolean
5047 bfd_mach_o_scan_start_address (bfd *abfd)
5048 {
5049 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5050 bfd_mach_o_thread_command *thr = NULL;
5051 bfd_mach_o_load_command *cmd;
5052 unsigned long i;
5053
5054 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5055 if (cmd->type == BFD_MACH_O_LC_THREAD
5056 || cmd->type == BFD_MACH_O_LC_UNIXTHREAD)
5057 {
5058 thr = &cmd->command.thread;
5059 break;
5060 }
5061 else if (cmd->type == BFD_MACH_O_LC_MAIN && mdata->nsects > 1)
5062 {
5063 bfd_mach_o_main_command *main_cmd = &cmd->command.main;
5064 bfd_mach_o_section *text_sect = mdata->sections[0];
5065
5066 if (text_sect)
5067 {
5068 abfd->start_address = main_cmd->entryoff
5069 + (text_sect->addr - text_sect->offset);
5070 return TRUE;
5071 }
5072 }
5073
5074 /* An object file has no start address, so do not fail if not found. */
5075 if (thr == NULL)
5076 return TRUE;
5077
5078 /* FIXME: create a subtarget hook ? */
5079 for (i = 0; i < thr->nflavours; i++)
5080 {
5081 if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_I386)
5082 && (thr->flavours[i].flavour == BFD_MACH_O_x86_THREAD_STATE32))
5083 {
5084 unsigned char buf[4];
5085
5086 if (bfd_seek (abfd, thr->flavours[i].offset + 40, SEEK_SET) != 0
5087 || bfd_bread (buf, 4, abfd) != 4)
5088 return FALSE;
5089
5090 abfd->start_address = bfd_h_get_32 (abfd, buf);
5091 }
5092 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC)
5093 && (thr->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE))
5094 {
5095 unsigned char buf[4];
5096
5097 if (bfd_seek (abfd, thr->flavours[i].offset + 0, 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_64)
5104 && (thr->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE64))
5105 {
5106 unsigned char buf[8];
5107
5108 if (bfd_seek (abfd, thr->flavours[i].offset + 0, SEEK_SET) != 0
5109 || bfd_bread (buf, 8, abfd) != 8)
5110 return FALSE;
5111
5112 abfd->start_address = bfd_h_get_64 (abfd, buf);
5113 }
5114 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_X86_64)
5115 && (thr->flavours[i].flavour == BFD_MACH_O_x86_THREAD_STATE64))
5116 {
5117 unsigned char buf[8];
5118
5119 if (bfd_seek (abfd, thr->flavours[i].offset + (16 * 8), 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 }
5126
5127 return TRUE;
5128 }
5129
5130 bfd_boolean
5131 bfd_mach_o_set_arch_mach (bfd *abfd,
5132 enum bfd_architecture arch,
5133 unsigned long machine)
5134 {
5135 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
5136
5137 /* If this isn't the right architecture for this backend, and this
5138 isn't the generic backend, fail. */
5139 if (arch != bed->arch
5140 && arch != bfd_arch_unknown
5141 && bed->arch != bfd_arch_unknown)
5142 return FALSE;
5143
5144 return bfd_default_set_arch_mach (abfd, arch, machine);
5145 }
5146
5147 static bfd_boolean
5148 bfd_mach_o_scan (bfd *abfd,
5149 bfd_mach_o_header *header,
5150 bfd_mach_o_data_struct *mdata)
5151 {
5152 unsigned int i;
5153 enum bfd_architecture cpu_type;
5154 unsigned long cpu_subtype;
5155 unsigned int hdrsize;
5156
5157 hdrsize = mach_o_wide_p (header) ?
5158 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
5159
5160 mdata->header = *header;
5161
5162 abfd->flags = abfd->flags & BFD_IN_MEMORY;
5163 switch (header->filetype)
5164 {
5165 case BFD_MACH_O_MH_OBJECT:
5166 abfd->flags |= HAS_RELOC;
5167 break;
5168 case BFD_MACH_O_MH_EXECUTE:
5169 abfd->flags |= EXEC_P;
5170 break;
5171 case BFD_MACH_O_MH_DYLIB:
5172 case BFD_MACH_O_MH_BUNDLE:
5173 abfd->flags |= DYNAMIC;
5174 break;
5175 }
5176
5177 abfd->tdata.mach_o_data = mdata;
5178
5179 bfd_mach_o_convert_architecture (header->cputype, header->cpusubtype,
5180 &cpu_type, &cpu_subtype);
5181 if (cpu_type == bfd_arch_unknown)
5182 {
5183 _bfd_error_handler
5184 /* xgettext:c-format */
5185 (_("bfd_mach_o_scan: unknown architecture 0x%lx/0x%lx"),
5186 header->cputype, header->cpusubtype);
5187 return FALSE;
5188 }
5189
5190 bfd_set_arch_mach (abfd, cpu_type, cpu_subtype);
5191
5192 if (header->ncmds != 0)
5193 {
5194 bfd_mach_o_load_command *cmd;
5195
5196 mdata->first_command = NULL;
5197 mdata->last_command = NULL;
5198
5199 cmd = bfd_alloc2 (abfd, header->ncmds, sizeof (bfd_mach_o_load_command));
5200 if (cmd == NULL)
5201 return FALSE;
5202
5203 for (i = 0; i < header->ncmds; i++)
5204 {
5205 bfd_mach_o_load_command *cur = &cmd[i];
5206
5207 bfd_mach_o_append_command (abfd, cur);
5208
5209 if (i == 0)
5210 cur->offset = hdrsize;
5211 else
5212 {
5213 bfd_mach_o_load_command *prev = &cmd[i - 1];
5214 cur->offset = prev->offset + prev->len;
5215 }
5216
5217 if (!bfd_mach_o_read_command (abfd, cur))
5218 return FALSE;
5219 }
5220 }
5221
5222 /* Sections should be flatten before scanning start address. */
5223 bfd_mach_o_flatten_sections (abfd);
5224 if (!bfd_mach_o_scan_start_address (abfd))
5225 return FALSE;
5226
5227 return TRUE;
5228 }
5229
5230 bfd_boolean
5231 bfd_mach_o_mkobject_init (bfd *abfd)
5232 {
5233 bfd_mach_o_data_struct *mdata = NULL;
5234
5235 mdata = bfd_zalloc (abfd, sizeof (bfd_mach_o_data_struct));
5236 if (mdata == NULL)
5237 return FALSE;
5238 abfd->tdata.mach_o_data = mdata;
5239
5240 mdata->header.magic = 0;
5241 mdata->header.cputype = 0;
5242 mdata->header.cpusubtype = 0;
5243 mdata->header.filetype = 0;
5244 mdata->header.ncmds = 0;
5245 mdata->header.sizeofcmds = 0;
5246 mdata->header.flags = 0;
5247 mdata->header.byteorder = BFD_ENDIAN_UNKNOWN;
5248 mdata->first_command = NULL;
5249 mdata->last_command = NULL;
5250 mdata->nsects = 0;
5251 mdata->sections = NULL;
5252 mdata->dyn_reloc_cache = NULL;
5253
5254 return TRUE;
5255 }
5256
5257 static bfd_boolean
5258 bfd_mach_o_gen_mkobject (bfd *abfd)
5259 {
5260 bfd_mach_o_data_struct *mdata;
5261
5262 if (!bfd_mach_o_mkobject_init (abfd))
5263 return FALSE;
5264
5265 mdata = bfd_mach_o_get_data (abfd);
5266 mdata->header.magic = BFD_MACH_O_MH_MAGIC;
5267 mdata->header.cputype = 0;
5268 mdata->header.cpusubtype = 0;
5269 mdata->header.byteorder = abfd->xvec->byteorder;
5270 mdata->header.version = 1;
5271
5272 return TRUE;
5273 }
5274
5275 const bfd_target *
5276 bfd_mach_o_header_p (bfd *abfd,
5277 file_ptr hdr_off,
5278 bfd_mach_o_filetype file_type,
5279 bfd_mach_o_cpu_type cpu_type)
5280 {
5281 bfd_mach_o_header header;
5282 bfd_mach_o_data_struct *mdata;
5283
5284 if (!bfd_mach_o_read_header (abfd, hdr_off, &header))
5285 goto wrong;
5286
5287 if (! (header.byteorder == BFD_ENDIAN_BIG
5288 || header.byteorder == BFD_ENDIAN_LITTLE))
5289 {
5290 _bfd_error_handler (_("unknown header byte-order value %#x"),
5291 header.byteorder);
5292 goto wrong;
5293 }
5294
5295 if (! ((header.byteorder == BFD_ENDIAN_BIG
5296 && abfd->xvec->byteorder == BFD_ENDIAN_BIG
5297 && abfd->xvec->header_byteorder == BFD_ENDIAN_BIG)
5298 || (header.byteorder == BFD_ENDIAN_LITTLE
5299 && abfd->xvec->byteorder == BFD_ENDIAN_LITTLE
5300 && abfd->xvec->header_byteorder == BFD_ENDIAN_LITTLE)))
5301 goto wrong;
5302
5303 /* Check cputype and filetype.
5304 In case of wildcard, do not accept magics that are handled by existing
5305 targets. */
5306 if (cpu_type)
5307 {
5308 if (header.cputype != cpu_type)
5309 goto wrong;
5310 }
5311 else
5312 {
5313 #ifndef BFD64
5314 /* Do not recognize 64 architectures if not configured for 64bit targets.
5315 This could happen only for generic targets. */
5316 if (mach_o_wide_p (&header))
5317 goto wrong;
5318 #endif
5319 }
5320
5321 if (file_type)
5322 {
5323 if (header.filetype != file_type)
5324 goto wrong;
5325 }
5326 else
5327 {
5328 switch (header.filetype)
5329 {
5330 case BFD_MACH_O_MH_CORE:
5331 /* Handled by core_p */
5332 goto wrong;
5333 default:
5334 break;
5335 }
5336 }
5337
5338 mdata = (bfd_mach_o_data_struct *) bfd_zalloc (abfd, sizeof (*mdata));
5339 if (mdata == NULL)
5340 goto fail;
5341 mdata->hdr_offset = hdr_off;
5342
5343 if (!bfd_mach_o_scan (abfd, &header, mdata))
5344 goto wrong;
5345
5346 return abfd->xvec;
5347
5348 wrong:
5349 bfd_set_error (bfd_error_wrong_format);
5350
5351 fail:
5352 return NULL;
5353 }
5354
5355 static const bfd_target *
5356 bfd_mach_o_gen_object_p (bfd *abfd)
5357 {
5358 return bfd_mach_o_header_p (abfd, 0, 0, 0);
5359 }
5360
5361 static const bfd_target *
5362 bfd_mach_o_gen_core_p (bfd *abfd)
5363 {
5364 return bfd_mach_o_header_p (abfd, 0, BFD_MACH_O_MH_CORE, 0);
5365 }
5366
5367 /* Return the base address of ABFD, ie the address at which the image is
5368 mapped. The possible initial pagezero is ignored. */
5369
5370 bfd_vma
5371 bfd_mach_o_get_base_address (bfd *abfd)
5372 {
5373 bfd_mach_o_data_struct *mdata;
5374 bfd_mach_o_load_command *cmd;
5375
5376 /* Check for Mach-O. */
5377 if (!bfd_mach_o_valid (abfd))
5378 return 0;
5379 mdata = bfd_mach_o_get_data (abfd);
5380
5381 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5382 {
5383 if ((cmd->type == BFD_MACH_O_LC_SEGMENT
5384 || cmd->type == BFD_MACH_O_LC_SEGMENT_64))
5385 {
5386 struct bfd_mach_o_segment_command *segcmd = &cmd->command.segment;
5387
5388 if (segcmd->initprot != 0)
5389 return segcmd->vmaddr;
5390 }
5391 }
5392 return 0;
5393 }
5394
5395 typedef struct mach_o_fat_archentry
5396 {
5397 unsigned long cputype;
5398 unsigned long cpusubtype;
5399 unsigned long offset;
5400 unsigned long size;
5401 unsigned long align;
5402 } mach_o_fat_archentry;
5403
5404 typedef struct mach_o_fat_data_struct
5405 {
5406 unsigned long magic;
5407 unsigned long nfat_arch;
5408 mach_o_fat_archentry *archentries;
5409 } mach_o_fat_data_struct;
5410
5411 const bfd_target *
5412 bfd_mach_o_fat_archive_p (bfd *abfd)
5413 {
5414 mach_o_fat_data_struct *adata = NULL;
5415 struct mach_o_fat_header_external hdr;
5416 unsigned long i;
5417
5418 if (bfd_seek (abfd, 0, SEEK_SET) != 0
5419 || bfd_bread (&hdr, sizeof (hdr), abfd) != sizeof (hdr))
5420 goto error;
5421
5422 adata = bfd_alloc (abfd, sizeof (mach_o_fat_data_struct));
5423 if (adata == NULL)
5424 goto error;
5425
5426 adata->magic = bfd_getb32 (hdr.magic);
5427 adata->nfat_arch = bfd_getb32 (hdr.nfat_arch);
5428 if (adata->magic != 0xcafebabe)
5429 goto error;
5430 /* Avoid matching Java bytecode files, which have the same magic number.
5431 In the Java bytecode file format this field contains the JVM version,
5432 which starts at 43.0. */
5433 if (adata->nfat_arch > 30)
5434 goto error;
5435
5436 adata->archentries =
5437 bfd_alloc2 (abfd, adata->nfat_arch, sizeof (mach_o_fat_archentry));
5438 if (adata->archentries == NULL)
5439 goto error;
5440
5441 for (i = 0; i < adata->nfat_arch; i++)
5442 {
5443 struct mach_o_fat_arch_external arch;
5444 if (bfd_bread (&arch, sizeof (arch), abfd) != sizeof (arch))
5445 goto error;
5446 adata->archentries[i].cputype = bfd_getb32 (arch.cputype);
5447 adata->archentries[i].cpusubtype = bfd_getb32 (arch.cpusubtype);
5448 adata->archentries[i].offset = bfd_getb32 (arch.offset);
5449 adata->archentries[i].size = bfd_getb32 (arch.size);
5450 adata->archentries[i].align = bfd_getb32 (arch.align);
5451 }
5452
5453 abfd->tdata.mach_o_fat_data = adata;
5454
5455 return abfd->xvec;
5456
5457 error:
5458 if (adata != NULL)
5459 bfd_release (abfd, adata);
5460 bfd_set_error (bfd_error_wrong_format);
5461 return NULL;
5462 }
5463
5464 /* Set the filename for a fat binary member ABFD, whose bfd architecture is
5465 ARCH_TYPE/ARCH_SUBTYPE and corresponding entry in header is ENTRY.
5466 Set arelt_data and origin fields too. */
5467
5468 static bfd_boolean
5469 bfd_mach_o_fat_member_init (bfd *abfd,
5470 enum bfd_architecture arch_type,
5471 unsigned long arch_subtype,
5472 mach_o_fat_archentry *entry)
5473 {
5474 struct areltdata *areltdata;
5475 /* Create the member filename. Use ARCH_NAME. */
5476 const bfd_arch_info_type *ap = bfd_lookup_arch (arch_type, arch_subtype);
5477 char *filename;
5478
5479 if (ap)
5480 {
5481 /* Use the architecture name if known. */
5482 filename = bfd_strdup (ap->printable_name);
5483 if (filename == NULL)
5484 return FALSE;
5485 }
5486 else
5487 {
5488 /* Forge a uniq id. */
5489 const size_t namelen = 2 + 8 + 1 + 2 + 8 + 1;
5490 filename = bfd_malloc (namelen);
5491 if (filename == NULL)
5492 return FALSE;
5493 snprintf (filename, namelen, "0x%lx-0x%lx",
5494 entry->cputype, entry->cpusubtype);
5495 }
5496 bfd_set_filename (abfd, filename);
5497
5498 areltdata = bfd_zmalloc (sizeof (struct areltdata));
5499 if (areltdata == NULL)
5500 return FALSE;
5501 areltdata->parsed_size = entry->size;
5502 abfd->arelt_data = areltdata;
5503 abfd->iostream = NULL;
5504 abfd->origin = entry->offset;
5505 return TRUE;
5506 }
5507
5508 bfd *
5509 bfd_mach_o_fat_openr_next_archived_file (bfd *archive, bfd *prev)
5510 {
5511 mach_o_fat_data_struct *adata;
5512 mach_o_fat_archentry *entry = NULL;
5513 unsigned long i;
5514 bfd *nbfd;
5515 enum bfd_architecture arch_type;
5516 unsigned long arch_subtype;
5517
5518 adata = (mach_o_fat_data_struct *) archive->tdata.mach_o_fat_data;
5519 BFD_ASSERT (adata != NULL);
5520
5521 /* Find index of previous entry. */
5522 if (prev == NULL)
5523 {
5524 /* Start at first one. */
5525 i = 0;
5526 }
5527 else
5528 {
5529 /* Find index of PREV. */
5530 for (i = 0; i < adata->nfat_arch; i++)
5531 {
5532 if (adata->archentries[i].offset == prev->origin)
5533 break;
5534 }
5535
5536 if (i == adata->nfat_arch)
5537 {
5538 /* Not found. */
5539 bfd_set_error (bfd_error_bad_value);
5540 return NULL;
5541 }
5542
5543 /* Get next entry. */
5544 i++;
5545 }
5546
5547 if (i >= adata->nfat_arch)
5548 {
5549 bfd_set_error (bfd_error_no_more_archived_files);
5550 return NULL;
5551 }
5552
5553 entry = &adata->archentries[i];
5554 nbfd = _bfd_new_bfd_contained_in (archive);
5555 if (nbfd == NULL)
5556 return NULL;
5557
5558 bfd_mach_o_convert_architecture (entry->cputype, entry->cpusubtype,
5559 &arch_type, &arch_subtype);
5560
5561 if (!bfd_mach_o_fat_member_init (nbfd, arch_type, arch_subtype, entry))
5562 {
5563 bfd_close (nbfd);
5564 return NULL;
5565 }
5566
5567 bfd_set_arch_mach (nbfd, arch_type, arch_subtype);
5568
5569 return nbfd;
5570 }
5571
5572 /* Analogous to stat call. */
5573
5574 static int
5575 bfd_mach_o_fat_stat_arch_elt (bfd *abfd, struct stat *buf)
5576 {
5577 if (abfd->arelt_data == NULL)
5578 {
5579 bfd_set_error (bfd_error_invalid_operation);
5580 return -1;
5581 }
5582
5583 buf->st_mtime = 0;
5584 buf->st_uid = 0;
5585 buf->st_gid = 0;
5586 buf->st_mode = 0644;
5587 buf->st_size = arelt_size (abfd);
5588
5589 return 0;
5590 }
5591
5592 /* If ABFD format is FORMAT and architecture is ARCH, return it.
5593 If ABFD is a fat image containing a member that corresponds to FORMAT
5594 and ARCH, returns it.
5595 In other case, returns NULL.
5596 This function allows transparent uses of fat images. */
5597
5598 bfd *
5599 bfd_mach_o_fat_extract (bfd *abfd,
5600 bfd_format format,
5601 const bfd_arch_info_type *arch)
5602 {
5603 bfd *res;
5604 mach_o_fat_data_struct *adata;
5605 unsigned int i;
5606
5607 if (bfd_check_format (abfd, format))
5608 {
5609 if (bfd_get_arch_info (abfd) == arch)
5610 return abfd;
5611 return NULL;
5612 }
5613 if (!bfd_check_format (abfd, bfd_archive)
5614 || abfd->xvec != &mach_o_fat_vec)
5615 return NULL;
5616
5617 /* This is a Mach-O fat image. */
5618 adata = (mach_o_fat_data_struct *) abfd->tdata.mach_o_fat_data;
5619 BFD_ASSERT (adata != NULL);
5620
5621 for (i = 0; i < adata->nfat_arch; i++)
5622 {
5623 struct mach_o_fat_archentry *e = &adata->archentries[i];
5624 enum bfd_architecture cpu_type;
5625 unsigned long cpu_subtype;
5626
5627 bfd_mach_o_convert_architecture (e->cputype, e->cpusubtype,
5628 &cpu_type, &cpu_subtype);
5629 if (cpu_type != arch->arch || cpu_subtype != arch->mach)
5630 continue;
5631
5632 /* The architecture is found. */
5633 res = _bfd_new_bfd_contained_in (abfd);
5634 if (res == NULL)
5635 return NULL;
5636
5637 if (bfd_mach_o_fat_member_init (res, cpu_type, cpu_subtype, e)
5638 && bfd_check_format (res, format))
5639 {
5640 BFD_ASSERT (bfd_get_arch_info (res) == arch);
5641 return res;
5642 }
5643 bfd_close (res);
5644 return NULL;
5645 }
5646
5647 return NULL;
5648 }
5649
5650 static bfd_boolean
5651 bfd_mach_o_fat_close_and_cleanup (bfd *abfd)
5652 {
5653 _bfd_unlink_from_archive_parent (abfd);
5654 return TRUE;
5655 }
5656
5657 int
5658 bfd_mach_o_lookup_command (bfd *abfd,
5659 bfd_mach_o_load_command_type type,
5660 bfd_mach_o_load_command **mcommand)
5661 {
5662 struct mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5663 struct bfd_mach_o_load_command *cmd;
5664 unsigned int num;
5665
5666 BFD_ASSERT (mdata != NULL);
5667 BFD_ASSERT (mcommand != NULL);
5668
5669 num = 0;
5670 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5671 {
5672 if (cmd->type != type)
5673 continue;
5674
5675 if (num == 0)
5676 *mcommand = cmd;
5677 num++;
5678 }
5679
5680 return num;
5681 }
5682
5683 unsigned long
5684 bfd_mach_o_stack_addr (enum bfd_mach_o_cpu_type type)
5685 {
5686 switch (type)
5687 {
5688 case BFD_MACH_O_CPU_TYPE_MC680x0:
5689 return 0x04000000;
5690 case BFD_MACH_O_CPU_TYPE_POWERPC:
5691 return 0xc0000000;
5692 case BFD_MACH_O_CPU_TYPE_I386:
5693 return 0xc0000000;
5694 case BFD_MACH_O_CPU_TYPE_SPARC:
5695 return 0xf0000000;
5696 case BFD_MACH_O_CPU_TYPE_HPPA:
5697 return 0xc0000000 - 0x04000000;
5698 default:
5699 return 0;
5700 }
5701 }
5702
5703 /* The following two tables should be kept, as far as possible, in order of
5704 most frequently used entries to optimize their use from gas. */
5705
5706 const bfd_mach_o_xlat_name bfd_mach_o_section_type_name[] =
5707 {
5708 { "regular", BFD_MACH_O_S_REGULAR},
5709 { "coalesced", BFD_MACH_O_S_COALESCED},
5710 { "zerofill", BFD_MACH_O_S_ZEROFILL},
5711 { "cstring_literals", BFD_MACH_O_S_CSTRING_LITERALS},
5712 { "4byte_literals", BFD_MACH_O_S_4BYTE_LITERALS},
5713 { "8byte_literals", BFD_MACH_O_S_8BYTE_LITERALS},
5714 { "16byte_literals", BFD_MACH_O_S_16BYTE_LITERALS},
5715 { "literal_pointers", BFD_MACH_O_S_LITERAL_POINTERS},
5716 { "mod_init_func_pointers", BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS},
5717 { "mod_fini_func_pointers", BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS},
5718 { "gb_zerofill", BFD_MACH_O_S_GB_ZEROFILL},
5719 { "interposing", BFD_MACH_O_S_INTERPOSING},
5720 { "dtrace_dof", BFD_MACH_O_S_DTRACE_DOF},
5721 { "non_lazy_symbol_pointers", BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS},
5722 { "lazy_symbol_pointers", BFD_MACH_O_S_LAZY_SYMBOL_POINTERS},
5723 { "symbol_stubs", BFD_MACH_O_S_SYMBOL_STUBS},
5724 { "lazy_dylib_symbol_pointers", BFD_MACH_O_S_LAZY_DYLIB_SYMBOL_POINTERS},
5725 { NULL, 0}
5726 };
5727
5728 const bfd_mach_o_xlat_name bfd_mach_o_section_attribute_name[] =
5729 {
5730 { "pure_instructions", BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS },
5731 { "some_instructions", BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS },
5732 { "loc_reloc", BFD_MACH_O_S_ATTR_LOC_RELOC },
5733 { "ext_reloc", BFD_MACH_O_S_ATTR_EXT_RELOC },
5734 { "debug", BFD_MACH_O_S_ATTR_DEBUG },
5735 { "live_support", BFD_MACH_O_S_ATTR_LIVE_SUPPORT },
5736 { "no_dead_strip", BFD_MACH_O_S_ATTR_NO_DEAD_STRIP },
5737 { "strip_static_syms", BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS },
5738 { "no_toc", BFD_MACH_O_S_ATTR_NO_TOC },
5739 { "self_modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
5740 { "modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
5741 { NULL, 0}
5742 };
5743
5744 /* Get the section type from NAME. Return 256 if NAME is unknown. */
5745
5746 unsigned int
5747 bfd_mach_o_get_section_type_from_name (bfd *abfd, const char *name)
5748 {
5749 const bfd_mach_o_xlat_name *x;
5750 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
5751
5752 for (x = bfd_mach_o_section_type_name; x->name; x++)
5753 if (strcmp (x->name, name) == 0)
5754 {
5755 /* We found it... does the target support it? */
5756 if (bed->bfd_mach_o_section_type_valid_for_target == NULL
5757 || bed->bfd_mach_o_section_type_valid_for_target (x->val))
5758 return x->val; /* OK. */
5759 else
5760 break; /* Not supported. */
5761 }
5762 /* Maximum section ID = 0xff. */
5763 return 256;
5764 }
5765
5766 /* Get the section attribute from NAME. Return -1 if NAME is unknown. */
5767
5768 unsigned int
5769 bfd_mach_o_get_section_attribute_from_name (const char *name)
5770 {
5771 const bfd_mach_o_xlat_name *x;
5772
5773 for (x = bfd_mach_o_section_attribute_name; x->name; x++)
5774 if (strcmp (x->name, name) == 0)
5775 return x->val;
5776 return (unsigned int)-1;
5777 }
5778
5779 int
5780 bfd_mach_o_core_fetch_environment (bfd *abfd,
5781 unsigned char **rbuf,
5782 unsigned int *rlen)
5783 {
5784 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5785 unsigned long stackaddr = bfd_mach_o_stack_addr (mdata->header.cputype);
5786 bfd_mach_o_load_command *cmd;
5787
5788 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5789 {
5790 bfd_mach_o_segment_command *seg;
5791
5792 if (cmd->type != BFD_MACH_O_LC_SEGMENT)
5793 continue;
5794
5795 seg = &cmd->command.segment;
5796
5797 if ((seg->vmaddr + seg->vmsize) == stackaddr)
5798 {
5799 unsigned long start = seg->fileoff;
5800 unsigned long end = seg->fileoff + seg->filesize;
5801 unsigned char *buf = bfd_malloc (1024);
5802 unsigned long size = 1024;
5803
5804 if (buf == NULL)
5805 return -1;
5806 for (;;)
5807 {
5808 bfd_size_type nread = 0;
5809 unsigned long offset;
5810 int found_nonnull = 0;
5811
5812 if (size > (end - start))
5813 size = (end - start);
5814
5815 buf = bfd_realloc_or_free (buf, size);
5816 if (buf == NULL)
5817 return -1;
5818
5819 if (bfd_seek (abfd, end - size, SEEK_SET) != 0)
5820 {
5821 free (buf);
5822 return -1;
5823 }
5824
5825 nread = bfd_bread (buf, size, abfd);
5826
5827 if (nread != size)
5828 {
5829 free (buf);
5830 return -1;
5831 }
5832
5833 for (offset = 4; offset <= size; offset += 4)
5834 {
5835 unsigned long val;
5836
5837 val = *((unsigned long *) (buf + size - offset));
5838 if (! found_nonnull)
5839 {
5840 if (val != 0)
5841 found_nonnull = 1;
5842 }
5843 else if (val == 0x0)
5844 {
5845 unsigned long bottom;
5846 unsigned long top;
5847
5848 bottom = seg->fileoff + seg->filesize - offset;
5849 top = seg->fileoff + seg->filesize - 4;
5850 *rbuf = bfd_malloc (top - bottom);
5851 if (*rbuf == NULL)
5852 return -1;
5853 *rlen = top - bottom;
5854
5855 memcpy (*rbuf, buf + size - *rlen, *rlen);
5856 free (buf);
5857 return 0;
5858 }
5859 }
5860
5861 if (size == (end - start))
5862 break;
5863
5864 size *= 2;
5865 }
5866
5867 free (buf);
5868 }
5869 }
5870
5871 return -1;
5872 }
5873
5874 char *
5875 bfd_mach_o_core_file_failing_command (bfd *abfd)
5876 {
5877 unsigned char *buf = NULL;
5878 unsigned int len = 0;
5879 int ret;
5880
5881 ret = bfd_mach_o_core_fetch_environment (abfd, &buf, &len);
5882 if (ret < 0)
5883 return NULL;
5884
5885 return (char *) buf;
5886 }
5887
5888 int
5889 bfd_mach_o_core_file_failing_signal (bfd *abfd ATTRIBUTE_UNUSED)
5890 {
5891 return 0;
5892 }
5893
5894 static bfd_mach_o_uuid_command *
5895 bfd_mach_o_lookup_uuid_command (bfd *abfd)
5896 {
5897 bfd_mach_o_load_command *uuid_cmd = NULL;
5898 int ncmd = bfd_mach_o_lookup_command (abfd, BFD_MACH_O_LC_UUID, &uuid_cmd);
5899 if (ncmd != 1 || uuid_cmd == NULL)
5900 return FALSE;
5901 return &uuid_cmd->command.uuid;
5902 }
5903
5904 /* Return true if ABFD is a dSYM file and its UUID matches UUID_CMD. */
5905
5906 static bfd_boolean
5907 bfd_mach_o_dsym_for_uuid_p (bfd *abfd, const bfd_mach_o_uuid_command *uuid_cmd)
5908 {
5909 bfd_mach_o_uuid_command *dsym_uuid_cmd;
5910
5911 BFD_ASSERT (abfd);
5912 BFD_ASSERT (uuid_cmd);
5913
5914 if (!bfd_check_format (abfd, bfd_object))
5915 return FALSE;
5916
5917 if (bfd_get_flavour (abfd) != bfd_target_mach_o_flavour
5918 || bfd_mach_o_get_data (abfd) == NULL
5919 || bfd_mach_o_get_data (abfd)->header.filetype != BFD_MACH_O_MH_DSYM)
5920 return FALSE;
5921
5922 dsym_uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd);
5923 if (dsym_uuid_cmd == NULL)
5924 return FALSE;
5925
5926 if (memcmp (uuid_cmd->uuid, dsym_uuid_cmd->uuid,
5927 sizeof (uuid_cmd->uuid)) != 0)
5928 return FALSE;
5929
5930 return TRUE;
5931 }
5932
5933 /* Find a BFD in DSYM_FILENAME which matches ARCH and UUID_CMD.
5934 The caller is responsible for closing the returned BFD object and
5935 its my_archive if the returned BFD is in a fat dSYM. */
5936
5937 static bfd *
5938 bfd_mach_o_find_dsym (const char *dsym_filename,
5939 const bfd_mach_o_uuid_command *uuid_cmd,
5940 const bfd_arch_info_type *arch)
5941 {
5942 bfd *base_dsym_bfd, *dsym_bfd;
5943
5944 BFD_ASSERT (uuid_cmd);
5945
5946 base_dsym_bfd = bfd_openr (dsym_filename, NULL);
5947 if (base_dsym_bfd == NULL)
5948 return NULL;
5949
5950 dsym_bfd = bfd_mach_o_fat_extract (base_dsym_bfd, bfd_object, arch);
5951 if (bfd_mach_o_dsym_for_uuid_p (dsym_bfd, uuid_cmd))
5952 return dsym_bfd;
5953
5954 bfd_close (dsym_bfd);
5955 if (base_dsym_bfd != dsym_bfd)
5956 bfd_close (base_dsym_bfd);
5957
5958 return NULL;
5959 }
5960
5961 /* Return a BFD created from a dSYM file for ABFD.
5962 The caller is responsible for closing the returned BFD object, its
5963 filename, and its my_archive if the returned BFD is in a fat dSYM. */
5964
5965 static bfd *
5966 bfd_mach_o_follow_dsym (bfd *abfd)
5967 {
5968 char *dsym_filename;
5969 bfd_mach_o_uuid_command *uuid_cmd;
5970 bfd *dsym_bfd, *base_bfd = abfd;
5971 const char *base_basename;
5972
5973 if (abfd == NULL || bfd_get_flavour (abfd) != bfd_target_mach_o_flavour)
5974 return NULL;
5975
5976 if (abfd->my_archive && !bfd_is_thin_archive (abfd->my_archive))
5977 base_bfd = abfd->my_archive;
5978 /* BFD may have been opened from a stream. */
5979 if (base_bfd->filename == NULL)
5980 {
5981 bfd_set_error (bfd_error_invalid_operation);
5982 return NULL;
5983 }
5984 base_basename = lbasename (base_bfd->filename);
5985
5986 uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd);
5987 if (uuid_cmd == NULL)
5988 return NULL;
5989
5990 /* TODO: We assume the DWARF file has the same as the binary's.
5991 It seems apple's GDB checks all files in the dSYM bundle directory.
5992 http://opensource.apple.com/source/gdb/gdb-1708/src/gdb/macosx/macosx-tdep.c
5993 */
5994 dsym_filename = (char *)bfd_malloc (strlen (base_bfd->filename)
5995 + strlen (dsym_subdir) + 1
5996 + strlen (base_basename) + 1);
5997 if (dsym_filename == NULL)
5998 return NULL;
5999
6000 sprintf (dsym_filename, "%s%s/%s",
6001 base_bfd->filename, dsym_subdir, base_basename);
6002
6003 dsym_bfd = bfd_mach_o_find_dsym (dsym_filename, uuid_cmd,
6004 bfd_get_arch_info (abfd));
6005 if (dsym_bfd == NULL)
6006 free (dsym_filename);
6007
6008 return dsym_bfd;
6009 }
6010
6011 bfd_boolean
6012 bfd_mach_o_find_nearest_line (bfd *abfd,
6013 asymbol **symbols,
6014 asection *section,
6015 bfd_vma offset,
6016 const char **filename_ptr,
6017 const char **functionname_ptr,
6018 unsigned int *line_ptr,
6019 unsigned int *discriminator_ptr)
6020 {
6021 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
6022 if (mdata == NULL)
6023 return FALSE;
6024 switch (mdata->header.filetype)
6025 {
6026 case BFD_MACH_O_MH_OBJECT:
6027 break;
6028 case BFD_MACH_O_MH_EXECUTE:
6029 case BFD_MACH_O_MH_DYLIB:
6030 case BFD_MACH_O_MH_BUNDLE:
6031 case BFD_MACH_O_MH_KEXT_BUNDLE:
6032 if (mdata->dwarf2_find_line_info == NULL)
6033 {
6034 mdata->dsym_bfd = bfd_mach_o_follow_dsym (abfd);
6035 /* When we couldn't find dSYM for this binary, we look for
6036 the debug information in the binary itself. In this way,
6037 we won't try finding separated dSYM again because
6038 mdata->dwarf2_find_line_info will be filled. */
6039 if (! mdata->dsym_bfd)
6040 break;
6041 if (! _bfd_dwarf2_slurp_debug_info (abfd, mdata->dsym_bfd,
6042 dwarf_debug_sections, symbols,
6043 &mdata->dwarf2_find_line_info,
6044 FALSE))
6045 return FALSE;
6046 }
6047 break;
6048 default:
6049 return FALSE;
6050 }
6051 return _bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset,
6052 filename_ptr, functionname_ptr,
6053 line_ptr, discriminator_ptr,
6054 dwarf_debug_sections,
6055 &mdata->dwarf2_find_line_info);
6056 }
6057
6058 bfd_boolean
6059 bfd_mach_o_close_and_cleanup (bfd *abfd)
6060 {
6061 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
6062 if (bfd_get_format (abfd) == bfd_object && mdata != NULL)
6063 {
6064 _bfd_dwarf2_cleanup_debug_info (abfd, &mdata->dwarf2_find_line_info);
6065 bfd_mach_o_free_cached_info (abfd);
6066 if (mdata->dsym_bfd != NULL)
6067 {
6068 bfd *fat_bfd = mdata->dsym_bfd->my_archive;
6069 #if 0
6070 /* FIXME: PR 19435: This calculation to find the memory allocated by
6071 bfd_mach_o_follow_dsym for the filename does not always end up
6072 selecting the correct pointer. Unfortunately this problem is
6073 very hard to reproduce on a non Mach-O native system, so until it
6074 can be traced and fixed on such a system, this code will remain
6075 commented out. This does mean that there will be a memory leak,
6076 but it is small, and happens when we are closing down, so it
6077 should not matter too much. */
6078 char *dsym_filename = (char *)(fat_bfd
6079 ? fat_bfd->filename
6080 : mdata->dsym_bfd->filename);
6081 #endif
6082 bfd_close (mdata->dsym_bfd);
6083 mdata->dsym_bfd = NULL;
6084 if (fat_bfd)
6085 bfd_close (fat_bfd);
6086 #if 0
6087 free (dsym_filename);
6088 #endif
6089 }
6090 }
6091
6092 return _bfd_generic_close_and_cleanup (abfd);
6093 }
6094
6095 bfd_boolean
6096 bfd_mach_o_free_cached_info (bfd *abfd)
6097 {
6098 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
6099 asection *asect;
6100 free (mdata->dyn_reloc_cache);
6101 mdata->dyn_reloc_cache = NULL;
6102 for (asect = abfd->sections; asect != NULL; asect = asect->next)
6103 {
6104 free (asect->relocation);
6105 asect->relocation = NULL;
6106 }
6107
6108 return TRUE;
6109 }
6110
6111 #define bfd_mach_o_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
6112 #define bfd_mach_o_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_lookup
6113
6114 #define bfd_mach_o_canonicalize_one_reloc NULL
6115 #define bfd_mach_o_swap_reloc_out NULL
6116 #define bfd_mach_o_print_thread NULL
6117 #define bfd_mach_o_tgt_seg_table NULL
6118 #define bfd_mach_o_section_type_valid_for_tgt NULL
6119
6120 #define TARGET_NAME mach_o_be_vec
6121 #define TARGET_STRING "mach-o-be"
6122 #define TARGET_ARCHITECTURE bfd_arch_unknown
6123 #define TARGET_PAGESIZE 1
6124 #define TARGET_BIG_ENDIAN 1
6125 #define TARGET_ARCHIVE 0
6126 #define TARGET_PRIORITY 1
6127 #include "mach-o-target.c"
6128
6129 #undef TARGET_NAME
6130 #undef TARGET_STRING
6131 #undef TARGET_ARCHITECTURE
6132 #undef TARGET_PAGESIZE
6133 #undef TARGET_BIG_ENDIAN
6134 #undef TARGET_ARCHIVE
6135 #undef TARGET_PRIORITY
6136
6137 #define TARGET_NAME mach_o_le_vec
6138 #define TARGET_STRING "mach-o-le"
6139 #define TARGET_ARCHITECTURE bfd_arch_unknown
6140 #define TARGET_PAGESIZE 1
6141 #define TARGET_BIG_ENDIAN 0
6142 #define TARGET_ARCHIVE 0
6143 #define TARGET_PRIORITY 1
6144
6145 #include "mach-o-target.c"
6146
6147 #undef TARGET_NAME
6148 #undef TARGET_STRING
6149 #undef TARGET_ARCHITECTURE
6150 #undef TARGET_PAGESIZE
6151 #undef TARGET_BIG_ENDIAN
6152 #undef TARGET_ARCHIVE
6153 #undef TARGET_PRIORITY
6154
6155 /* Not yet handled: creating an archive. */
6156 #define bfd_mach_o_mkarchive _bfd_noarchive_mkarchive
6157
6158 #define bfd_mach_o_close_and_cleanup bfd_mach_o_fat_close_and_cleanup
6159
6160 /* Not used. */
6161 #define bfd_mach_o_generic_stat_arch_elt bfd_mach_o_fat_stat_arch_elt
6162 #define bfd_mach_o_openr_next_archived_file bfd_mach_o_fat_openr_next_archived_file
6163 #define bfd_mach_o_archive_p bfd_mach_o_fat_archive_p
6164
6165 #define TARGET_NAME mach_o_fat_vec
6166 #define TARGET_STRING "mach-o-fat"
6167 #define TARGET_ARCHITECTURE bfd_arch_unknown
6168 #define TARGET_PAGESIZE 1
6169 #define TARGET_BIG_ENDIAN 1
6170 #define TARGET_ARCHIVE 1
6171 #define TARGET_PRIORITY 0
6172
6173 #include "mach-o-target.c"
6174
6175 #undef TARGET_NAME
6176 #undef TARGET_STRING
6177 #undef TARGET_ARCHITECTURE
6178 #undef TARGET_PAGESIZE
6179 #undef TARGET_BIG_ENDIAN
6180 #undef TARGET_ARCHIVE
6181 #undef TARGET_PRIORITY
GDB Binutils - Deliverables
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