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_bfd_mul_overflow
[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 size_t amt;
2558
2559 nsect = bfd_count_sections (abfd);
2560
2561 /* Don't do it if it's already set - assume the application knows what it's
2562 doing. */
2563 if (mdata->nsects == nsect
2564 && (mdata->nsects == 0 || mdata->sections != NULL))
2565 return TRUE;
2566
2567 /* We need to check that this can be done... */
2568 if (nsect > 255)
2569 {
2570 _bfd_error_handler (_("mach-o: there are too many sections (%u)"
2571 " maximum is 255,\n"), nsect);
2572 return FALSE;
2573 }
2574
2575 mdata->nsects = nsect;
2576 if (_bfd_mul_overflow (mdata->nsects, sizeof (bfd_mach_o_section *), &amt))
2577 {
2578 bfd_set_error (bfd_error_no_memory);
2579 return FALSE;
2580 }
2581 mdata->sections = bfd_alloc (abfd, amt);
2582 if (mdata->sections == NULL)
2583 return FALSE;
2584
2585 /* Create Mach-O sections.
2586 Section type, attribute and align should have been set when the
2587 section was created - either read in or specified. */
2588 target_index = 0;
2589 for (sec = abfd->sections; sec; sec = sec->next)
2590 {
2591 unsigned bfd_align = bfd_section_alignment (sec);
2592 bfd_mach_o_section *msect = bfd_mach_o_get_mach_o_section (sec);
2593
2594 mdata->sections[target_index] = msect;
2595
2596 msect->addr = bfd_section_vma (sec);
2597 msect->size = bfd_section_size (sec);
2598
2599 /* Use the largest alignment set, in case it was bumped after the
2600 section was created. */
2601 msect->align = msect->align > bfd_align ? msect->align : bfd_align;
2602
2603 msect->offset = 0;
2604 sec->target_index = ++target_index;
2605 }
2606
2607 return TRUE;
2608 }
2609
2610 bfd_boolean
2611 bfd_mach_o_write_contents (bfd *abfd)
2612 {
2613 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2614 bfd_mach_o_load_command *cmd;
2615 bfd_mach_o_symtab_command *symtab = NULL;
2616 bfd_mach_o_dysymtab_command *dysymtab = NULL;
2617 bfd_mach_o_segment_command *linkedit = NULL;
2618
2619 /* Make the commands, if not already present. */
2620 if (!abfd->output_has_begun && !bfd_mach_o_build_commands (abfd))
2621 return FALSE;
2622 abfd->output_has_begun = TRUE;
2623
2624 /* Write the header. */
2625 if (!bfd_mach_o_write_header (abfd, &mdata->header))
2626 return FALSE;
2627
2628 /* First pass: allocate the linkedit segment. */
2629 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
2630 switch (cmd->type)
2631 {
2632 case BFD_MACH_O_LC_SEGMENT_64:
2633 case BFD_MACH_O_LC_SEGMENT:
2634 if (strcmp (cmd->command.segment.segname, "__LINKEDIT") == 0)
2635 linkedit = &cmd->command.segment;
2636 break;
2637 case BFD_MACH_O_LC_SYMTAB:
2638 symtab = &cmd->command.symtab;
2639 break;
2640 case BFD_MACH_O_LC_DYSYMTAB:
2641 dysymtab = &cmd->command.dysymtab;
2642 break;
2643 case BFD_MACH_O_LC_DYLD_INFO:
2644 {
2645 bfd_mach_o_dyld_info_command *di = &cmd->command.dyld_info;
2646
2647 if (di->rebase_size != 0)
2648 {
2649 di->rebase_off = mdata->filelen;
2650 mdata->filelen += di->rebase_size;
2651 }
2652 if (di->bind_size != 0)
2653 {
2654 di->bind_off = mdata->filelen;
2655 mdata->filelen += di->bind_size;
2656 }
2657 if (di->weak_bind_size != 0)
2658 {
2659 di->weak_bind_off = mdata->filelen;
2660 mdata->filelen += di->weak_bind_size;
2661 }
2662 if (di->lazy_bind_size != 0)
2663 {
2664 di->lazy_bind_off = mdata->filelen;
2665 mdata->filelen += di->lazy_bind_size;
2666 }
2667 if (di->export_size != 0)
2668 {
2669 di->export_off = mdata->filelen;
2670 mdata->filelen += di->export_size;
2671 }
2672 }
2673 break;
2674 case BFD_MACH_O_LC_LOAD_DYLIB:
2675 case BFD_MACH_O_LC_LOAD_DYLINKER:
2676 case BFD_MACH_O_LC_MAIN:
2677 /* Nothing to do. */
2678 break;
2679 default:
2680 _bfd_error_handler
2681 (_("unable to allocate data for load command %#x"),
2682 cmd->type);
2683 break;
2684 }
2685
2686 /* Specially handle symtab and dysymtab. */
2687
2688 /* Pre-allocate the symbol table (but not the string table). The reason
2689 is that the dysymtab is after the symbol table but before the string
2690 table (required by the native strip tool). */
2691 if (symtab != NULL)
2692 {
2693 unsigned int symlen;
2694 unsigned int wide = bfd_mach_o_wide_p (abfd);
2695
2696 symlen = wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE;
2697
2698 /* Align for symbols. */
2699 mdata->filelen = FILE_ALIGN (mdata->filelen, wide ? 3 : 2);
2700 symtab->symoff = mdata->filelen;
2701
2702 symtab->nsyms = bfd_get_symcount (abfd);
2703 mdata->filelen += symtab->nsyms * symlen;
2704 }
2705
2706 /* Build the dysymtab. */
2707 if (dysymtab != NULL)
2708 if (!bfd_mach_o_build_dysymtab (abfd, dysymtab))
2709 return FALSE;
2710
2711 /* Write symtab and strtab. */
2712 if (symtab != NULL)
2713 if (!bfd_mach_o_write_symtab_content (abfd, symtab))
2714 return FALSE;
2715
2716 /* Adjust linkedit size. */
2717 if (linkedit != NULL)
2718 {
2719 /* bfd_vma pagemask = bfd_mach_o_get_backend_data (abfd)->page_size - 1; */
2720
2721 linkedit->vmsize = mdata->filelen - linkedit->fileoff;
2722 /* linkedit->vmsize = (linkedit->vmsize + pagemask) & ~pagemask; */
2723 linkedit->filesize = mdata->filelen - linkedit->fileoff;
2724
2725 linkedit->initprot = BFD_MACH_O_PROT_READ;
2726 linkedit->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
2727 | BFD_MACH_O_PROT_EXECUTE;
2728 }
2729
2730 /* Second pass: write commands. */
2731 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
2732 {
2733 struct mach_o_load_command_external raw;
2734 unsigned long typeflag;
2735
2736 typeflag = cmd->type | (cmd->type_required ? BFD_MACH_O_LC_REQ_DYLD : 0);
2737
2738 bfd_h_put_32 (abfd, typeflag, raw.cmd);
2739 bfd_h_put_32 (abfd, cmd->len, raw.cmdsize);
2740
2741 if (bfd_seek (abfd, cmd->offset, SEEK_SET) != 0
2742 || bfd_bwrite (&raw, BFD_MACH_O_LC_SIZE, abfd) != 8)
2743 return FALSE;
2744
2745 switch (cmd->type)
2746 {
2747 case BFD_MACH_O_LC_SEGMENT:
2748 if (!bfd_mach_o_write_segment_32 (abfd, cmd))
2749 return FALSE;
2750 break;
2751 case BFD_MACH_O_LC_SEGMENT_64:
2752 if (!bfd_mach_o_write_segment_64 (abfd, cmd))
2753 return FALSE;
2754 break;
2755 case BFD_MACH_O_LC_SYMTAB:
2756 if (!bfd_mach_o_write_symtab (abfd, cmd))
2757 return FALSE;
2758 break;
2759 case BFD_MACH_O_LC_DYSYMTAB:
2760 if (!bfd_mach_o_write_dysymtab (abfd, cmd))
2761 return FALSE;
2762 break;
2763 case BFD_MACH_O_LC_THREAD:
2764 case BFD_MACH_O_LC_UNIXTHREAD:
2765 if (!bfd_mach_o_write_thread (abfd, cmd))
2766 return FALSE;
2767 break;
2768 case BFD_MACH_O_LC_LOAD_DYLIB:
2769 if (!bfd_mach_o_write_dylib (abfd, cmd))
2770 return FALSE;
2771 break;
2772 case BFD_MACH_O_LC_LOAD_DYLINKER:
2773 if (!bfd_mach_o_write_dylinker (abfd, cmd))
2774 return FALSE;
2775 break;
2776 case BFD_MACH_O_LC_MAIN:
2777 if (!bfd_mach_o_write_main (abfd, cmd))
2778 return FALSE;
2779 break;
2780 case BFD_MACH_O_LC_DYLD_INFO:
2781 if (!bfd_mach_o_write_dyld_info (abfd, cmd))
2782 return FALSE;
2783 break;
2784 default:
2785 _bfd_error_handler
2786 (_("unable to write unknown load command %#x"),
2787 cmd->type);
2788 return FALSE;
2789 }
2790 }
2791
2792 return TRUE;
2793 }
2794
2795 static void
2796 bfd_mach_o_append_section_to_segment (bfd_mach_o_segment_command *seg,
2797 bfd_mach_o_section *s)
2798 {
2799 if (seg->sect_head == NULL)
2800 seg->sect_head = s;
2801 else
2802 seg->sect_tail->next = s;
2803 seg->sect_tail = s;
2804 }
2805
2806 /* Create section Mach-O flags from BFD flags. */
2807
2808 static void
2809 bfd_mach_o_set_section_flags_from_bfd (bfd *abfd ATTRIBUTE_UNUSED,
2810 asection *sec)
2811 {
2812 flagword bfd_flags;
2813 bfd_mach_o_section *s = bfd_mach_o_get_mach_o_section (sec);
2814
2815 /* Create default flags. */
2816 bfd_flags = bfd_section_flags (sec);
2817 if ((bfd_flags & SEC_CODE) == SEC_CODE)
2818 s->flags = BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS
2819 | BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS
2820 | BFD_MACH_O_S_REGULAR;
2821 else if ((bfd_flags & (SEC_ALLOC | SEC_LOAD)) == SEC_ALLOC)
2822 s->flags = BFD_MACH_O_S_ZEROFILL;
2823 else if (bfd_flags & SEC_DEBUGGING)
2824 s->flags = BFD_MACH_O_S_REGULAR | BFD_MACH_O_S_ATTR_DEBUG;
2825 else
2826 s->flags = BFD_MACH_O_S_REGULAR;
2827 }
2828
2829 static bfd_boolean
2830 bfd_mach_o_build_obj_seg_command (bfd *abfd, bfd_mach_o_segment_command *seg)
2831 {
2832 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2833 unsigned int i, j;
2834
2835 seg->vmaddr = 0;
2836 seg->fileoff = mdata->filelen;
2837 seg->initprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
2838 | BFD_MACH_O_PROT_EXECUTE;
2839 seg->maxprot = seg->initprot;
2840
2841 /* Append sections to the segment.
2842
2843 This is a little tedious, we have to honor the need to account zerofill
2844 sections after all the rest. This forces us to do the calculation of
2845 total vmsize in three passes so that any alignment increments are
2846 properly accounted. */
2847 for (i = 0; i < mdata->nsects; ++i)
2848 {
2849 bfd_mach_o_section *s = mdata->sections[i];
2850 asection *sec = s->bfdsection;
2851
2852 /* Although we account for zerofill section sizes in vm order, they are
2853 placed in the file in source sequence. */
2854 bfd_mach_o_append_section_to_segment (seg, s);
2855 s->offset = 0;
2856
2857 /* Zerofill sections have zero file size & offset, the only content
2858 written to the file is the symbols. */
2859 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) == BFD_MACH_O_S_ZEROFILL
2860 || ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2861 == BFD_MACH_O_S_GB_ZEROFILL))
2862 continue;
2863
2864 /* The Darwin system tools (in MH_OBJECT files, at least) always account
2865 sections, even those with zero size. */
2866 if (s->size > 0)
2867 {
2868 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2869 seg->vmsize += s->size;
2870
2871 /* MH_OBJECT files have unaligned content. */
2872 if (1)
2873 {
2874 seg->filesize = FILE_ALIGN (seg->filesize, s->align);
2875 mdata->filelen = FILE_ALIGN (mdata->filelen, s->align);
2876 }
2877 seg->filesize += s->size;
2878
2879 /* The system tools write even zero-sized sections with an offset
2880 field set to the current file position. */
2881 s->offset = mdata->filelen;
2882 }
2883
2884 sec->filepos = s->offset;
2885 mdata->filelen += s->size;
2886 }
2887
2888 /* Now pass through again, for zerofill, only now we just update the
2889 vmsize, and then for zerofill_GB. */
2890 for (j = 0; j < 2; j++)
2891 {
2892 unsigned int stype;
2893
2894 if (j == 0)
2895 stype = BFD_MACH_O_S_ZEROFILL;
2896 else
2897 stype = BFD_MACH_O_S_GB_ZEROFILL;
2898
2899 for (i = 0; i < mdata->nsects; ++i)
2900 {
2901 bfd_mach_o_section *s = mdata->sections[i];
2902
2903 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != stype)
2904 continue;
2905
2906 if (s->size > 0)
2907 {
2908 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2909 seg->vmsize += s->size;
2910 }
2911 }
2912 }
2913
2914 /* Allocate space for the relocations. */
2915 mdata->filelen = FILE_ALIGN (mdata->filelen, 2);
2916
2917 for (i = 0; i < mdata->nsects; ++i)
2918 {
2919 bfd_mach_o_section *ms = mdata->sections[i];
2920 asection *sec = ms->bfdsection;
2921
2922 ms->nreloc = sec->reloc_count;
2923 if (ms->nreloc == 0)
2924 {
2925 /* Clear nreloc and reloff if there is no relocs. */
2926 ms->reloff = 0;
2927 continue;
2928 }
2929 sec->rel_filepos = mdata->filelen;
2930 ms->reloff = sec->rel_filepos;
2931 mdata->filelen += sec->reloc_count * BFD_MACH_O_RELENT_SIZE;
2932 }
2933
2934 return TRUE;
2935 }
2936
2937 static bfd_boolean
2938 bfd_mach_o_build_exec_seg_command (bfd *abfd, bfd_mach_o_segment_command *seg)
2939 {
2940 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2941 unsigned int i;
2942 bfd_vma pagemask = bfd_mach_o_get_backend_data (abfd)->page_size - 1;
2943 bfd_vma vma;
2944 bfd_mach_o_section *s;
2945
2946 seg->vmsize = 0;
2947
2948 seg->fileoff = mdata->filelen;
2949 seg->maxprot = 0;
2950 seg->initprot = 0;
2951 seg->flags = 0;
2952
2953 /* Append sections to the segment. We assume they are properly ordered
2954 by vma (but we check that). */
2955 vma = 0;
2956 for (i = 0; i < mdata->nsects; ++i)
2957 {
2958 s = mdata->sections[i];
2959
2960 /* Consider only sections for this segment. */
2961 if (strcmp (seg->segname, s->segname) != 0)
2962 continue;
2963
2964 bfd_mach_o_append_section_to_segment (seg, s);
2965
2966 if (s->addr < vma)
2967 {
2968 _bfd_error_handler
2969 /* xgettext:c-format */
2970 (_("section address (%#" PRIx64 ") "
2971 "below start of segment (%#" PRIx64 ")"),
2972 (uint64_t) s->addr, (uint64_t) vma);
2973 return FALSE;
2974 }
2975
2976 vma = s->addr + s->size;
2977 }
2978
2979 /* Set segment file offset: make it page aligned. */
2980 vma = seg->sect_head->addr;
2981 seg->vmaddr = vma & ~pagemask;
2982 if ((mdata->filelen & pagemask) > (vma & pagemask))
2983 mdata->filelen += pagemask + 1;
2984 seg->fileoff = mdata->filelen & ~pagemask;
2985 mdata->filelen = seg->fileoff + (vma & pagemask);
2986
2987 /* Set section file offset. */
2988 for (s = seg->sect_head; s != NULL; s = s->next)
2989 {
2990 asection *sec = s->bfdsection;
2991 flagword flags = bfd_section_flags (sec);
2992
2993 /* Adjust segment size. */
2994 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2995 seg->vmsize += s->size;
2996
2997 /* File offset and length. */
2998 seg->filesize = FILE_ALIGN (seg->filesize, s->align);
2999
3000 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != BFD_MACH_O_S_ZEROFILL
3001 && ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK)
3002 != BFD_MACH_O_S_GB_ZEROFILL))
3003 {
3004 mdata->filelen = FILE_ALIGN (mdata->filelen, s->align);
3005
3006 s->offset = mdata->filelen;
3007 s->bfdsection->filepos = s->offset;
3008
3009 seg->filesize += s->size;
3010 mdata->filelen += s->size;
3011 }
3012 else
3013 {
3014 s->offset = 0;
3015 s->bfdsection->filepos = 0;
3016 }
3017
3018 /* Set protection. */
3019 if (flags & SEC_LOAD)
3020 {
3021 if (flags & SEC_CODE)
3022 seg->initprot |= BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_EXECUTE;
3023 if ((flags & (SEC_DATA | SEC_READONLY)) == SEC_DATA)
3024 seg->initprot |= BFD_MACH_O_PROT_WRITE | BFD_MACH_O_PROT_READ;
3025 }
3026
3027 /* Relocs shouldn't appear in non-object files. */
3028 if (s->bfdsection->reloc_count != 0)
3029 return FALSE;
3030 }
3031
3032 /* Set maxprot. */
3033 if (seg->initprot != 0)
3034 seg->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
3035 | BFD_MACH_O_PROT_EXECUTE;
3036 else
3037 seg->maxprot = 0;
3038
3039 /* Round segment size (and file size). */
3040 seg->vmsize = (seg->vmsize + pagemask) & ~pagemask;
3041 seg->filesize = (seg->filesize + pagemask) & ~pagemask;
3042 mdata->filelen = (mdata->filelen + pagemask) & ~pagemask;
3043
3044 return TRUE;
3045 }
3046
3047 /* Layout the commands: set commands size and offset, set ncmds and sizeofcmds
3048 fields in header. */
3049
3050 static bfd_boolean
3051 bfd_mach_o_layout_commands (bfd_mach_o_data_struct *mdata)
3052 {
3053 unsigned wide = mach_o_wide_p (&mdata->header);
3054 unsigned int hdrlen;
3055 ufile_ptr offset;
3056 bfd_mach_o_load_command *cmd;
3057 unsigned int align;
3058 bfd_boolean ret = TRUE;
3059
3060 hdrlen = wide ? BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
3061 align = wide ? 8 - 1 : 4 - 1;
3062 offset = hdrlen;
3063 mdata->header.ncmds = 0;
3064
3065 for (cmd = mdata->first_command; cmd; cmd = cmd->next)
3066 {
3067 mdata->header.ncmds++;
3068 cmd->offset = offset;
3069
3070 switch (cmd->type)
3071 {
3072 case BFD_MACH_O_LC_SEGMENT_64:
3073 cmd->len = BFD_MACH_O_LC_SEGMENT_64_SIZE
3074 + BFD_MACH_O_SECTION_64_SIZE * cmd->command.segment.nsects;
3075 break;
3076 case BFD_MACH_O_LC_SEGMENT:
3077 cmd->len = BFD_MACH_O_LC_SEGMENT_SIZE
3078 + BFD_MACH_O_SECTION_SIZE * cmd->command.segment.nsects;
3079 break;
3080 case BFD_MACH_O_LC_SYMTAB:
3081 cmd->len = sizeof (struct mach_o_symtab_command_external)
3082 + BFD_MACH_O_LC_SIZE;
3083 break;
3084 case BFD_MACH_O_LC_DYSYMTAB:
3085 cmd->len = sizeof (struct mach_o_dysymtab_command_external)
3086 + BFD_MACH_O_LC_SIZE;
3087 break;
3088 case BFD_MACH_O_LC_LOAD_DYLIB:
3089 cmd->len = sizeof (struct mach_o_dylib_command_external)
3090 + BFD_MACH_O_LC_SIZE;
3091 cmd->command.dylib.name_offset = cmd->len;
3092 cmd->len += strlen (cmd->command.dylib.name_str);
3093 cmd->len = (cmd->len + align) & ~align;
3094 break;
3095 case BFD_MACH_O_LC_LOAD_DYLINKER:
3096 cmd->len = sizeof (struct mach_o_str_command_external)
3097 + BFD_MACH_O_LC_SIZE;
3098 cmd->command.dylinker.name_offset = cmd->len;
3099 cmd->len += strlen (cmd->command.dylinker.name_str);
3100 cmd->len = (cmd->len + align) & ~align;
3101 break;
3102 case BFD_MACH_O_LC_MAIN:
3103 cmd->len = sizeof (struct mach_o_entry_point_command_external)
3104 + BFD_MACH_O_LC_SIZE;
3105 break;
3106 case BFD_MACH_O_LC_DYLD_INFO:
3107 cmd->len = sizeof (struct mach_o_dyld_info_command_external)
3108 + BFD_MACH_O_LC_SIZE;
3109 break;
3110 default:
3111 _bfd_error_handler
3112 (_("unable to layout unknown load command %#x"),
3113 cmd->type);
3114 ret = FALSE;
3115 break;
3116 }
3117
3118 BFD_ASSERT (cmd->len % (align + 1) == 0);
3119 offset += cmd->len;
3120 }
3121 mdata->header.sizeofcmds = offset - hdrlen;
3122 mdata->filelen = offset;
3123
3124 return ret;
3125 }
3126
3127 /* Subroutine of bfd_mach_o_build_commands: set type, name and nsects of a
3128 segment. */
3129
3130 static void
3131 bfd_mach_o_init_segment (bfd_mach_o_data_struct *mdata,
3132 bfd_mach_o_load_command *cmd,
3133 const char *segname, unsigned int nbr_sect)
3134 {
3135 bfd_mach_o_segment_command *seg = &cmd->command.segment;
3136 unsigned wide = mach_o_wide_p (&mdata->header);
3137
3138 /* Init segment command. */
3139 cmd->type = wide ? BFD_MACH_O_LC_SEGMENT_64 : BFD_MACH_O_LC_SEGMENT;
3140 cmd->type_required = FALSE;
3141
3142 strcpy (seg->segname, segname);
3143 seg->nsects = nbr_sect;
3144
3145 seg->vmaddr = 0;
3146 seg->vmsize = 0;
3147
3148 seg->fileoff = 0;
3149 seg->filesize = 0;
3150 seg->maxprot = 0;
3151 seg->initprot = 0;
3152 seg->flags = 0;
3153 seg->sect_head = NULL;
3154 seg->sect_tail = NULL;
3155 }
3156
3157 /* Build Mach-O load commands (currently assuming an MH_OBJECT file).
3158 TODO: Other file formats, rebuilding symtab/dysymtab commands for strip
3159 and copy functionality. */
3160
3161 bfd_boolean
3162 bfd_mach_o_build_commands (bfd *abfd)
3163 {
3164 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3165 unsigned wide = mach_o_wide_p (&mdata->header);
3166 unsigned int nbr_segcmd = 0;
3167 bfd_mach_o_load_command *commands;
3168 unsigned int nbr_commands;
3169 int symtab_idx = -1;
3170 int dysymtab_idx = -1;
3171 int main_idx = -1;
3172 unsigned int i;
3173
3174 /* Return now if already built. */
3175 if (mdata->header.ncmds != 0)
3176 return TRUE;
3177
3178 /* Fill in the file type, if not already set. */
3179 if (mdata->header.filetype == 0)
3180 {
3181 if (abfd->flags & EXEC_P)
3182 mdata->header.filetype = BFD_MACH_O_MH_EXECUTE;
3183 else if (abfd->flags & DYNAMIC)
3184 mdata->header.filetype = BFD_MACH_O_MH_DYLIB;
3185 else
3186 mdata->header.filetype = BFD_MACH_O_MH_OBJECT;
3187 }
3188
3189 /* If hasn't already been done, flatten sections list, and sort
3190 if/when required. Must be done before the symbol table is adjusted,
3191 since that depends on properly numbered sections. */
3192 if (mdata->nsects == 0 || mdata->sections == NULL)
3193 if (! bfd_mach_o_mangle_sections (abfd, mdata))
3194 return FALSE;
3195
3196 /* Order the symbol table, fill-in/check mach-o specific fields and
3197 partition out any indirect symbols. */
3198 if (!bfd_mach_o_mangle_symbols (abfd))
3199 return FALSE;
3200
3201 /* Segment commands. */
3202 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT)
3203 {
3204 /* Only one segment for all the sections. But the segment is
3205 optional if there is no sections. */
3206 nbr_segcmd = (mdata->nsects > 0) ? 1 : 0;
3207 }
3208 else
3209 {
3210 bfd_mach_o_section *prev_sect = NULL;
3211
3212 /* One pagezero segment and one linkedit segment. */
3213 nbr_segcmd = 2;
3214
3215 /* Create one segment for associated segment name in sections.
3216 Assume that sections with the same segment name are consecutive. */
3217 for (i = 0; i < mdata->nsects; i++)
3218 {
3219 bfd_mach_o_section *this_sect = mdata->sections[i];
3220
3221 if (prev_sect == NULL
3222 || strcmp (prev_sect->segname, this_sect->segname) != 0)
3223 {
3224 nbr_segcmd++;
3225 prev_sect = this_sect;
3226 }
3227 }
3228 }
3229
3230 nbr_commands = nbr_segcmd;
3231
3232 /* One command for the symbol table (only if there are symbols. */
3233 if (bfd_get_symcount (abfd) > 0)
3234 symtab_idx = nbr_commands++;
3235
3236 /* FIXME:
3237 This is a rather crude test for whether we should build a dysymtab. */
3238 if (bfd_mach_o_should_emit_dysymtab ()
3239 && bfd_get_symcount (abfd))
3240 {
3241 /* If there should be a case where a dysymtab could be emitted without
3242 a symtab (seems improbable), this would need amending. */
3243 dysymtab_idx = nbr_commands++;
3244 }
3245
3246 /* Add an entry point command. */
3247 if (mdata->header.filetype == BFD_MACH_O_MH_EXECUTE
3248 && bfd_get_start_address (abfd) != 0)
3249 main_idx = nbr_commands++;
3250
3251 /* Well, we must have a header, at least. */
3252 mdata->filelen = wide ? BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
3253
3254 /* A bit unusual, but no content is valid;
3255 as -n empty.s -o empty.o */
3256 if (nbr_commands == 0)
3257 {
3258 /* Layout commands (well none...) and set headers command fields. */
3259 return bfd_mach_o_layout_commands (mdata);
3260 }
3261
3262 /* Create commands for segments (and symtabs), prepend them. */
3263 commands = bfd_zalloc (abfd, nbr_commands * sizeof (bfd_mach_o_load_command));
3264 if (commands == NULL)
3265 return FALSE;
3266 for (i = 0; i < nbr_commands - 1; i++)
3267 commands[i].next = &commands[i + 1];
3268 commands[nbr_commands - 1].next = mdata->first_command;
3269 if (mdata->first_command == NULL)
3270 mdata->last_command = &commands[nbr_commands - 1];
3271 mdata->first_command = &commands[0];
3272
3273 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT && nbr_segcmd != 0)
3274 {
3275 /* For object file, there is only one segment. */
3276 bfd_mach_o_init_segment (mdata, &commands[0], "", mdata->nsects);
3277 }
3278 else if (nbr_segcmd != 0)
3279 {
3280 bfd_mach_o_load_command *cmd;
3281
3282 BFD_ASSERT (nbr_segcmd >= 2);
3283
3284 /* The pagezero. */
3285 cmd = &commands[0];
3286 bfd_mach_o_init_segment (mdata, cmd, "__PAGEZERO", 0);
3287
3288 /* Segments from sections. */
3289 cmd++;
3290 for (i = 0; i < mdata->nsects;)
3291 {
3292 const char *segname = mdata->sections[i]->segname;
3293 unsigned int nbr_sect = 1;
3294
3295 /* Count number of sections for this segment. */
3296 for (i++; i < mdata->nsects; i++)
3297 if (strcmp (mdata->sections[i]->segname, segname) == 0)
3298 nbr_sect++;
3299 else
3300 break;
3301
3302 bfd_mach_o_init_segment (mdata, cmd, segname, nbr_sect);
3303 cmd++;
3304 }
3305
3306 /* The linkedit. */
3307 bfd_mach_o_init_segment (mdata, cmd, "__LINKEDIT", 0);
3308 }
3309
3310 if (symtab_idx >= 0)
3311 {
3312 /* Init symtab command. */
3313 bfd_mach_o_load_command *cmd = &commands[symtab_idx];
3314
3315 cmd->type = BFD_MACH_O_LC_SYMTAB;
3316 cmd->type_required = FALSE;
3317 }
3318
3319 /* If required, setup symtab command, see comment above about the quality
3320 of this test. */
3321 if (dysymtab_idx >= 0)
3322 {
3323 bfd_mach_o_load_command *cmd = &commands[dysymtab_idx];
3324
3325 cmd->type = BFD_MACH_O_LC_DYSYMTAB;
3326 cmd->type_required = FALSE;
3327 }
3328
3329 /* Create the main command. */
3330 if (main_idx >= 0)
3331 {
3332 bfd_mach_o_load_command *cmd = &commands[main_idx];
3333
3334 cmd->type = BFD_MACH_O_LC_MAIN;
3335 cmd->type_required = TRUE;
3336
3337 cmd->command.main.entryoff = 0;
3338 cmd->command.main.stacksize = 0;
3339 }
3340
3341 /* Layout commands. */
3342 if (! bfd_mach_o_layout_commands (mdata))
3343 return FALSE;
3344
3345 /* So, now we have sized the commands and the filelen set to that.
3346 Now we can build the segment command and set the section file offsets. */
3347 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT)
3348 {
3349 for (i = 0; i < nbr_segcmd; i++)
3350 if (!bfd_mach_o_build_obj_seg_command
3351 (abfd, &commands[i].command.segment))
3352 return FALSE;
3353 }
3354 else
3355 {
3356 bfd_vma maxvma = 0;
3357
3358 /* Skip pagezero and linkedit segments. */
3359 for (i = 1; i < nbr_segcmd - 1; i++)
3360 {
3361 bfd_mach_o_segment_command *seg = &commands[i].command.segment;
3362
3363 if (!bfd_mach_o_build_exec_seg_command (abfd, seg))
3364 return FALSE;
3365
3366 if (seg->vmaddr + seg->vmsize > maxvma)
3367 maxvma = seg->vmaddr + seg->vmsize;
3368 }
3369
3370 /* Set the size of __PAGEZERO. */
3371 commands[0].command.segment.vmsize =
3372 commands[1].command.segment.vmaddr;
3373
3374 /* Set the vma and fileoff of __LINKEDIT. */
3375 commands[nbr_segcmd - 1].command.segment.vmaddr = maxvma;
3376 commands[nbr_segcmd - 1].command.segment.fileoff = mdata->filelen;
3377
3378 /* Set entry point (once segments have been laid out). */
3379 if (main_idx >= 0)
3380 commands[main_idx].command.main.entryoff =
3381 bfd_get_start_address (abfd) - commands[1].command.segment.vmaddr;
3382 }
3383
3384 return TRUE;
3385 }
3386
3387 /* Set the contents of a section. */
3388
3389 bfd_boolean
3390 bfd_mach_o_set_section_contents (bfd *abfd,
3391 asection *section,
3392 const void * location,
3393 file_ptr offset,
3394 bfd_size_type count)
3395 {
3396 file_ptr pos;
3397
3398 /* Trying to write the first section contents will trigger the creation of
3399 the load commands if they are not already present. */
3400 if (!abfd->output_has_begun && !bfd_mach_o_build_commands (abfd))
3401 return FALSE;
3402
3403 if (count == 0)
3404 return TRUE;
3405
3406 pos = section->filepos + offset;
3407 if (bfd_seek (abfd, pos, SEEK_SET) != 0
3408 || bfd_bwrite (location, count, abfd) != count)
3409 return FALSE;
3410
3411 return TRUE;
3412 }
3413
3414 int
3415 bfd_mach_o_sizeof_headers (bfd *a ATTRIBUTE_UNUSED,
3416 struct bfd_link_info *info ATTRIBUTE_UNUSED)
3417 {
3418 return 0;
3419 }
3420
3421 /* Make an empty symbol. This is required only because
3422 bfd_make_section_anyway wants to create a symbol for the section. */
3423
3424 asymbol *
3425 bfd_mach_o_make_empty_symbol (bfd *abfd)
3426 {
3427 asymbol *new_symbol;
3428
3429 new_symbol = bfd_zalloc (abfd, sizeof (bfd_mach_o_asymbol));
3430 if (new_symbol == NULL)
3431 return new_symbol;
3432 new_symbol->the_bfd = abfd;
3433 new_symbol->udata.i = SYM_MACHO_FIELDS_UNSET;
3434 return new_symbol;
3435 }
3436
3437 static bfd_boolean
3438 bfd_mach_o_read_header (bfd *abfd, file_ptr hdr_off, bfd_mach_o_header *header)
3439 {
3440 struct mach_o_header_external raw;
3441 unsigned int size;
3442 bfd_vma (*get32) (const void *) = NULL;
3443
3444 /* Just read the magic number. */
3445 if (bfd_seek (abfd, hdr_off, SEEK_SET) != 0
3446 || bfd_bread (raw.magic, sizeof (raw.magic), abfd) != 4)
3447 return FALSE;
3448
3449 if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC)
3450 {
3451 header->byteorder = BFD_ENDIAN_BIG;
3452 header->magic = BFD_MACH_O_MH_MAGIC;
3453 header->version = 1;
3454 get32 = bfd_getb32;
3455 }
3456 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC)
3457 {
3458 header->byteorder = BFD_ENDIAN_LITTLE;
3459 header->magic = BFD_MACH_O_MH_MAGIC;
3460 header->version = 1;
3461 get32 = bfd_getl32;
3462 }
3463 else if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64)
3464 {
3465 header->byteorder = BFD_ENDIAN_BIG;
3466 header->magic = BFD_MACH_O_MH_MAGIC_64;
3467 header->version = 2;
3468 get32 = bfd_getb32;
3469 }
3470 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64)
3471 {
3472 header->byteorder = BFD_ENDIAN_LITTLE;
3473 header->magic = BFD_MACH_O_MH_MAGIC_64;
3474 header->version = 2;
3475 get32 = bfd_getl32;
3476 }
3477 else
3478 {
3479 header->byteorder = BFD_ENDIAN_UNKNOWN;
3480 return FALSE;
3481 }
3482
3483 /* Once the size of the header is known, read the full header. */
3484 size = mach_o_wide_p (header) ?
3485 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
3486
3487 if (bfd_seek (abfd, hdr_off, SEEK_SET) != 0
3488 || bfd_bread (&raw, size, abfd) != size)
3489 return FALSE;
3490
3491 header->cputype = (*get32) (raw.cputype);
3492 header->cpusubtype = (*get32) (raw.cpusubtype);
3493 header->filetype = (*get32) (raw.filetype);
3494 header->ncmds = (*get32) (raw.ncmds);
3495 header->sizeofcmds = (*get32) (raw.sizeofcmds);
3496 header->flags = (*get32) (raw.flags);
3497
3498 if (mach_o_wide_p (header))
3499 header->reserved = (*get32) (raw.reserved);
3500 else
3501 header->reserved = 0;
3502
3503 return TRUE;
3504 }
3505
3506 bfd_boolean
3507 bfd_mach_o_new_section_hook (bfd *abfd, asection *sec)
3508 {
3509 bfd_mach_o_section *s;
3510 unsigned bfdalign = bfd_section_alignment (sec);
3511
3512 s = bfd_mach_o_get_mach_o_section (sec);
3513 if (s == NULL)
3514 {
3515 flagword bfd_flags;
3516 static const mach_o_section_name_xlat * xlat;
3517
3518 s = (bfd_mach_o_section *) bfd_zalloc (abfd, sizeof (*s));
3519 if (s == NULL)
3520 return FALSE;
3521 sec->used_by_bfd = s;
3522 s->bfdsection = sec;
3523
3524 /* Create the Darwin seg/sect name pair from the bfd name.
3525 If this is a canonical name for which a specific paiting exists
3526 there will also be defined flags, type, attribute and alignment
3527 values. */
3528 xlat = bfd_mach_o_convert_section_name_to_mach_o (abfd, sec, s);
3529 if (xlat != NULL)
3530 {
3531 s->flags = xlat->macho_sectype | xlat->macho_secattr;
3532 s->align = xlat->sectalign > bfdalign ? xlat->sectalign
3533 : bfdalign;
3534 bfd_set_section_alignment (sec, s->align);
3535 bfd_flags = bfd_section_flags (sec);
3536 if (bfd_flags == SEC_NO_FLAGS)
3537 bfd_set_section_flags (sec, xlat->bfd_flags);
3538 }
3539 else
3540 /* Create default flags. */
3541 bfd_mach_o_set_section_flags_from_bfd (abfd, sec);
3542 }
3543
3544 return _bfd_generic_new_section_hook (abfd, sec);
3545 }
3546
3547 static void
3548 bfd_mach_o_init_section_from_mach_o (asection *sec, unsigned long prot)
3549 {
3550 flagword flags;
3551 bfd_mach_o_section *section;
3552
3553 flags = bfd_section_flags (sec);
3554 section = bfd_mach_o_get_mach_o_section (sec);
3555
3556 /* TODO: see if we should use the xlat system for doing this by
3557 preference and fall back to this for unknown sections. */
3558
3559 if (flags == SEC_NO_FLAGS)
3560 {
3561 /* Try to guess flags. */
3562 if (section->flags & BFD_MACH_O_S_ATTR_DEBUG)
3563 flags = SEC_DEBUGGING;
3564 else
3565 {
3566 flags = SEC_ALLOC;
3567 if ((section->flags & BFD_MACH_O_SECTION_TYPE_MASK)
3568 != BFD_MACH_O_S_ZEROFILL)
3569 {
3570 flags |= SEC_LOAD;
3571 if (prot & BFD_MACH_O_PROT_EXECUTE)
3572 flags |= SEC_CODE;
3573 if (prot & BFD_MACH_O_PROT_WRITE)
3574 flags |= SEC_DATA;
3575 else if (prot & BFD_MACH_O_PROT_READ)
3576 flags |= SEC_READONLY;
3577 }
3578 }
3579 }
3580 else
3581 {
3582 if ((flags & SEC_DEBUGGING) == 0)
3583 flags |= SEC_ALLOC;
3584 }
3585
3586 if (section->offset != 0)
3587 flags |= SEC_HAS_CONTENTS;
3588 if (section->nreloc != 0)
3589 flags |= SEC_RELOC;
3590
3591 bfd_set_section_flags (sec, flags);
3592
3593 sec->vma = section->addr;
3594 sec->lma = section->addr;
3595 sec->size = section->size;
3596 sec->filepos = section->offset;
3597 sec->alignment_power = section->align;
3598 sec->segment_mark = 0;
3599 sec->reloc_count = section->nreloc;
3600 sec->rel_filepos = section->reloff;
3601 }
3602
3603 static asection *
3604 bfd_mach_o_make_bfd_section (bfd *abfd,
3605 const unsigned char *segname,
3606 const unsigned char *sectname)
3607 {
3608 const char *sname;
3609 flagword flags;
3610
3611 bfd_mach_o_convert_section_name_to_bfd
3612 (abfd, (const char *)segname, (const char *)sectname, &sname, &flags);
3613 if (sname == NULL)
3614 return NULL;
3615
3616 return bfd_make_section_anyway_with_flags (abfd, sname, flags);
3617 }
3618
3619 static asection *
3620 bfd_mach_o_read_section_32 (bfd *abfd, unsigned long prot)
3621 {
3622 struct mach_o_section_32_external raw;
3623 asection *sec;
3624 bfd_mach_o_section *section;
3625
3626 if (bfd_bread (&raw, BFD_MACH_O_SECTION_SIZE, abfd)
3627 != BFD_MACH_O_SECTION_SIZE)
3628 return NULL;
3629
3630 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname);
3631 if (sec == NULL)
3632 return NULL;
3633
3634 section = bfd_mach_o_get_mach_o_section (sec);
3635 memcpy (section->segname, raw.segname, sizeof (raw.segname));
3636 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0;
3637 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname));
3638 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0;
3639 section->addr = bfd_h_get_32 (abfd, raw.addr);
3640 section->size = bfd_h_get_32 (abfd, raw.size);
3641 section->offset = bfd_h_get_32 (abfd, raw.offset);
3642 section->align = bfd_h_get_32 (abfd, raw.align);
3643 /* PR 17512: file: 0017eb76. */
3644 if (section->align > 64)
3645 {
3646 _bfd_error_handler
3647 (_("bfd_mach_o_read_section_32: overlarge alignment value: %#lx, "
3648 "using 32 instead"), section->align);
3649 section->align = 32;
3650 }
3651 section->reloff = bfd_h_get_32 (abfd, raw.reloff);
3652 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc);
3653 section->flags = bfd_h_get_32 (abfd, raw.flags);
3654 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1);
3655 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2);
3656 section->reserved3 = 0;
3657
3658 bfd_mach_o_init_section_from_mach_o (sec, prot);
3659
3660 return sec;
3661 }
3662
3663 static asection *
3664 bfd_mach_o_read_section_64 (bfd *abfd, unsigned long prot)
3665 {
3666 struct mach_o_section_64_external raw;
3667 asection *sec;
3668 bfd_mach_o_section *section;
3669
3670 if (bfd_bread (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd)
3671 != BFD_MACH_O_SECTION_64_SIZE)
3672 return NULL;
3673
3674 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname);
3675 if (sec == NULL)
3676 return NULL;
3677
3678 section = bfd_mach_o_get_mach_o_section (sec);
3679 memcpy (section->segname, raw.segname, sizeof (raw.segname));
3680 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0;
3681 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname));
3682 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0;
3683 section->addr = bfd_h_get_64 (abfd, raw.addr);
3684 section->size = bfd_h_get_64 (abfd, raw.size);
3685 section->offset = bfd_h_get_32 (abfd, raw.offset);
3686 section->align = bfd_h_get_32 (abfd, raw.align);
3687 if (section->align > 64)
3688 {
3689 _bfd_error_handler
3690 (_("bfd_mach_o_read_section_64: overlarge alignment value: %#lx, "
3691 "using 32 instead"), section->align);
3692 section->align = 32;
3693 }
3694 section->reloff = bfd_h_get_32 (abfd, raw.reloff);
3695 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc);
3696 section->flags = bfd_h_get_32 (abfd, raw.flags);
3697 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1);
3698 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2);
3699 section->reserved3 = bfd_h_get_32 (abfd, raw.reserved3);
3700
3701 bfd_mach_o_init_section_from_mach_o (sec, prot);
3702
3703 return sec;
3704 }
3705
3706 static asection *
3707 bfd_mach_o_read_section (bfd *abfd, unsigned long prot, unsigned int wide)
3708 {
3709 if (wide)
3710 return bfd_mach_o_read_section_64 (abfd, prot);
3711 else
3712 return bfd_mach_o_read_section_32 (abfd, prot);
3713 }
3714
3715 static bfd_boolean
3716 bfd_mach_o_read_symtab_symbol (bfd *abfd,
3717 bfd_mach_o_symtab_command *sym,
3718 bfd_mach_o_asymbol *s,
3719 unsigned long i)
3720 {
3721 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3722 unsigned int wide = mach_o_wide_p (&mdata->header);
3723 unsigned int symwidth =
3724 wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE;
3725 unsigned int symoff = sym->symoff + (i * symwidth);
3726 struct mach_o_nlist_64_external raw;
3727 unsigned char type = -1;
3728 unsigned char section = -1;
3729 short desc = -1;
3730 symvalue value = -1;
3731 unsigned long stroff = -1;
3732 unsigned int symtype = -1;
3733
3734 BFD_ASSERT (sym->strtab != NULL);
3735
3736 if (bfd_seek (abfd, symoff, SEEK_SET) != 0
3737 || bfd_bread (&raw, symwidth, abfd) != symwidth)
3738 {
3739 _bfd_error_handler
3740 /* xgettext:c-format */
3741 (_("bfd_mach_o_read_symtab_symbol: unable to read %d bytes at %u"),
3742 symwidth, symoff);
3743 return FALSE;
3744 }
3745
3746 stroff = bfd_h_get_32 (abfd, raw.n_strx);
3747 type = bfd_h_get_8 (abfd, raw.n_type);
3748 symtype = type & BFD_MACH_O_N_TYPE;
3749 section = bfd_h_get_8 (abfd, raw.n_sect);
3750 desc = bfd_h_get_16 (abfd, raw.n_desc);
3751 if (wide)
3752 value = bfd_h_get_64 (abfd, raw.n_value);
3753 else
3754 value = bfd_h_get_32 (abfd, raw.n_value);
3755
3756 if (stroff >= sym->strsize)
3757 {
3758 _bfd_error_handler
3759 /* xgettext:c-format */
3760 (_("bfd_mach_o_read_symtab_symbol: name out of range (%lu >= %u)"),
3761 stroff,
3762 sym->strsize);
3763 return FALSE;
3764 }
3765
3766 s->symbol.the_bfd = abfd;
3767 s->symbol.name = sym->strtab + stroff;
3768 s->symbol.value = value;
3769 s->symbol.flags = 0x0;
3770 s->symbol.udata.i = i;
3771 s->n_type = type;
3772 s->n_sect = section;
3773 s->n_desc = desc;
3774
3775 if (type & BFD_MACH_O_N_STAB)
3776 {
3777 s->symbol.flags |= BSF_DEBUGGING;
3778 s->symbol.section = bfd_und_section_ptr;
3779 switch (type)
3780 {
3781 case N_FUN:
3782 case N_STSYM:
3783 case N_LCSYM:
3784 case N_BNSYM:
3785 case N_SLINE:
3786 case N_ENSYM:
3787 case N_ECOMM:
3788 case N_ECOML:
3789 case N_GSYM:
3790 if ((section > 0) && (section <= mdata->nsects))
3791 {
3792 s->symbol.section = mdata->sections[section - 1]->bfdsection;
3793 s->symbol.value =
3794 s->symbol.value - mdata->sections[section - 1]->addr;
3795 }
3796 break;
3797 }
3798 }
3799 else
3800 {
3801 if (type & (BFD_MACH_O_N_PEXT | BFD_MACH_O_N_EXT))
3802 s->symbol.flags |= BSF_GLOBAL;
3803 else
3804 s->symbol.flags |= BSF_LOCAL;
3805
3806 switch (symtype)
3807 {
3808 case BFD_MACH_O_N_UNDF:
3809 if (type == (BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT)
3810 && s->symbol.value != 0)
3811 {
3812 /* A common symbol. */
3813 s->symbol.section = bfd_com_section_ptr;
3814 s->symbol.flags = BSF_NO_FLAGS;
3815 }
3816 else
3817 {
3818 s->symbol.section = bfd_und_section_ptr;
3819 if (s->n_desc & BFD_MACH_O_N_WEAK_REF)
3820 s->symbol.flags |= BSF_WEAK;
3821 }
3822 break;
3823 case BFD_MACH_O_N_PBUD:
3824 s->symbol.section = bfd_und_section_ptr;
3825 break;
3826 case BFD_MACH_O_N_ABS:
3827 s->symbol.section = bfd_abs_section_ptr;
3828 break;
3829 case BFD_MACH_O_N_SECT:
3830 if ((section > 0) && (section <= mdata->nsects))
3831 {
3832 s->symbol.section = mdata->sections[section - 1]->bfdsection;
3833 s->symbol.value =
3834 s->symbol.value - mdata->sections[section - 1]->addr;
3835 }
3836 else
3837 {
3838 /* Mach-O uses 0 to mean "no section"; not an error. */
3839 if (section != 0)
3840 {
3841 _bfd_error_handler
3842 /* xgettext:c-format */
3843 (_("bfd_mach_o_read_symtab_symbol: "
3844 "symbol \"%s\" specified invalid section %d (max %lu): "
3845 "setting to undefined"),
3846 s->symbol.name, section, mdata->nsects);
3847 }
3848 s->symbol.section = bfd_und_section_ptr;
3849 }
3850 break;
3851 case BFD_MACH_O_N_INDR:
3852 /* FIXME: we don't follow the BFD convention as this indirect symbol
3853 won't be followed by the referenced one. This looks harmless
3854 unless we start using the linker. */
3855 s->symbol.flags |= BSF_INDIRECT;
3856 s->symbol.section = bfd_ind_section_ptr;
3857 s->symbol.value = 0;
3858 break;
3859 default:
3860 _bfd_error_handler
3861 /* xgettext:c-format */
3862 (_("bfd_mach_o_read_symtab_symbol: "
3863 "symbol \"%s\" specified invalid type field 0x%x: "
3864 "setting to undefined"), s->symbol.name, symtype);
3865 s->symbol.section = bfd_und_section_ptr;
3866 break;
3867 }
3868 }
3869
3870 return TRUE;
3871 }
3872
3873 bfd_boolean
3874 bfd_mach_o_read_symtab_strtab (bfd *abfd)
3875 {
3876 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3877 bfd_mach_o_symtab_command *sym = mdata->symtab;
3878
3879 /* Fail if there is no symtab. */
3880 if (sym == NULL)
3881 return FALSE;
3882
3883 /* Success if already loaded. */
3884 if (sym->strtab)
3885 return TRUE;
3886
3887 if (abfd->flags & BFD_IN_MEMORY)
3888 {
3889 struct bfd_in_memory *b;
3890
3891 b = (struct bfd_in_memory *) abfd->iostream;
3892
3893 if ((sym->stroff + sym->strsize) > b->size)
3894 {
3895 bfd_set_error (bfd_error_file_truncated);
3896 return FALSE;
3897 }
3898 sym->strtab = (char *) b->buffer + sym->stroff;
3899 }
3900 else
3901 {
3902 /* See PR 21840 for a reproducer. */
3903 if ((sym->strsize + 1) == 0)
3904 return FALSE;
3905 sym->strtab = bfd_alloc (abfd, sym->strsize + 1);
3906 if (sym->strtab == NULL)
3907 return FALSE;
3908
3909 if (bfd_seek (abfd, sym->stroff, SEEK_SET) != 0
3910 || bfd_bread (sym->strtab, sym->strsize, abfd) != sym->strsize)
3911 {
3912 /* PR 17512: file: 10888-1609-0.004. */
3913 bfd_release (abfd, sym->strtab);
3914 sym->strtab = NULL;
3915 bfd_set_error (bfd_error_file_truncated);
3916 return FALSE;
3917 }
3918 /* Zero terminate the string table. */
3919 sym->strtab[sym->strsize] = 0;
3920 }
3921
3922 return TRUE;
3923 }
3924
3925 bfd_boolean
3926 bfd_mach_o_read_symtab_symbols (bfd *abfd)
3927 {
3928 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3929 bfd_mach_o_symtab_command *sym = mdata->symtab;
3930 unsigned long i;
3931 size_t amt;
3932
3933 if (sym == NULL || sym->symbols)
3934 /* Return now if there are no symbols or if already loaded. */
3935 return TRUE;
3936
3937 if (_bfd_mul_overflow (sym->nsyms, sizeof (bfd_mach_o_asymbol), &amt)
3938 || (sym->symbols = bfd_alloc (abfd, amt)) == NULL)
3939 {
3940 bfd_set_error (bfd_error_no_memory);
3941 _bfd_error_handler (_("bfd_mach_o_read_symtab_symbols: "
3942 "unable to allocate memory for symbols"));
3943 sym->nsyms = 0;
3944 return FALSE;
3945 }
3946
3947 if (!bfd_mach_o_read_symtab_strtab (abfd))
3948 goto fail;
3949
3950 for (i = 0; i < sym->nsyms; i++)
3951 if (!bfd_mach_o_read_symtab_symbol (abfd, sym, &sym->symbols[i], i))
3952 goto fail;
3953
3954 return TRUE;
3955
3956 fail:
3957 bfd_release (abfd, sym->symbols);
3958 sym->symbols = NULL;
3959 sym->nsyms = 0;
3960 return FALSE;
3961 }
3962
3963 static const char *
3964 bfd_mach_o_i386_flavour_string (unsigned int flavour)
3965 {
3966 switch ((int) flavour)
3967 {
3968 case BFD_MACH_O_x86_THREAD_STATE32: return "x86_THREAD_STATE32";
3969 case BFD_MACH_O_x86_FLOAT_STATE32: return "x86_FLOAT_STATE32";
3970 case BFD_MACH_O_x86_EXCEPTION_STATE32: return "x86_EXCEPTION_STATE32";
3971 case BFD_MACH_O_x86_THREAD_STATE64: return "x86_THREAD_STATE64";
3972 case BFD_MACH_O_x86_FLOAT_STATE64: return "x86_FLOAT_STATE64";
3973 case BFD_MACH_O_x86_EXCEPTION_STATE64: return "x86_EXCEPTION_STATE64";
3974 case BFD_MACH_O_x86_THREAD_STATE: return "x86_THREAD_STATE";
3975 case BFD_MACH_O_x86_FLOAT_STATE: return "x86_FLOAT_STATE";
3976 case BFD_MACH_O_x86_EXCEPTION_STATE: return "x86_EXCEPTION_STATE";
3977 case BFD_MACH_O_x86_DEBUG_STATE32: return "x86_DEBUG_STATE32";
3978 case BFD_MACH_O_x86_DEBUG_STATE64: return "x86_DEBUG_STATE64";
3979 case BFD_MACH_O_x86_DEBUG_STATE: return "x86_DEBUG_STATE";
3980 case BFD_MACH_O_x86_THREAD_STATE_NONE: return "x86_THREAD_STATE_NONE";
3981 default: return "UNKNOWN";
3982 }
3983 }
3984
3985 static const char *
3986 bfd_mach_o_ppc_flavour_string (unsigned int flavour)
3987 {
3988 switch ((int) flavour)
3989 {
3990 case BFD_MACH_O_PPC_THREAD_STATE: return "PPC_THREAD_STATE";
3991 case BFD_MACH_O_PPC_FLOAT_STATE: return "PPC_FLOAT_STATE";
3992 case BFD_MACH_O_PPC_EXCEPTION_STATE: return "PPC_EXCEPTION_STATE";
3993 case BFD_MACH_O_PPC_VECTOR_STATE: return "PPC_VECTOR_STATE";
3994 case BFD_MACH_O_PPC_THREAD_STATE64: return "PPC_THREAD_STATE64";
3995 case BFD_MACH_O_PPC_EXCEPTION_STATE64: return "PPC_EXCEPTION_STATE64";
3996 default: return "UNKNOWN";
3997 }
3998 }
3999
4000 static bfd_boolean
4001 bfd_mach_o_read_dylinker (bfd *abfd, bfd_mach_o_load_command *command)
4002 {
4003 bfd_mach_o_dylinker_command *cmd = &command->command.dylinker;
4004 struct mach_o_str_command_external raw;
4005 unsigned int nameoff;
4006 unsigned int namelen;
4007
4008 if (command->len < sizeof (raw) + 8)
4009 return FALSE;
4010 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4011 return FALSE;
4012
4013 nameoff = bfd_h_get_32 (abfd, raw.str);
4014 if (nameoff > command->len)
4015 return FALSE;
4016
4017 cmd->name_offset = nameoff;
4018 namelen = command->len - nameoff;
4019 nameoff += command->offset;
4020 cmd->name_str = bfd_alloc (abfd, namelen);
4021 if (cmd->name_str == NULL)
4022 return FALSE;
4023 if (bfd_seek (abfd, nameoff, SEEK_SET) != 0
4024 || bfd_bread (cmd->name_str, namelen, abfd) != namelen)
4025 return FALSE;
4026 return TRUE;
4027 }
4028
4029 static bfd_boolean
4030 bfd_mach_o_read_dylib (bfd *abfd, bfd_mach_o_load_command *command)
4031 {
4032 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4033 bfd_mach_o_dylib_command *cmd = &command->command.dylib;
4034 struct mach_o_dylib_command_external raw;
4035 unsigned int nameoff;
4036 unsigned int namelen;
4037
4038 if (command->len < sizeof (raw) + 8)
4039 return FALSE;
4040 switch (command->type)
4041 {
4042 case BFD_MACH_O_LC_LOAD_DYLIB:
4043 case BFD_MACH_O_LC_LAZY_LOAD_DYLIB:
4044 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
4045 case BFD_MACH_O_LC_ID_DYLIB:
4046 case BFD_MACH_O_LC_REEXPORT_DYLIB:
4047 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
4048 break;
4049 default:
4050 BFD_FAIL ();
4051 return FALSE;
4052 }
4053
4054 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4055 return FALSE;
4056
4057 nameoff = bfd_h_get_32 (abfd, raw.name);
4058 if (nameoff > command->len)
4059 return FALSE;
4060 cmd->timestamp = bfd_h_get_32 (abfd, raw.timestamp);
4061 cmd->current_version = bfd_h_get_32 (abfd, raw.current_version);
4062 cmd->compatibility_version = bfd_h_get_32 (abfd, raw.compatibility_version);
4063
4064 cmd->name_offset = command->offset + nameoff;
4065 namelen = command->len - nameoff;
4066 cmd->name_str = bfd_alloc (abfd, namelen);
4067 if (cmd->name_str == NULL)
4068 return FALSE;
4069 if (bfd_seek (abfd, mdata->hdr_offset + cmd->name_offset, SEEK_SET) != 0
4070 || bfd_bread (cmd->name_str, namelen, abfd) != namelen)
4071 return FALSE;
4072 return TRUE;
4073 }
4074
4075 static bfd_boolean
4076 bfd_mach_o_read_prebound_dylib (bfd *abfd,
4077 bfd_mach_o_load_command *command)
4078 {
4079 bfd_mach_o_prebound_dylib_command *cmd = &command->command.prebound_dylib;
4080 struct mach_o_prebound_dylib_command_external raw;
4081 unsigned int nameoff;
4082 unsigned int modoff;
4083 unsigned int str_len;
4084 unsigned char *str;
4085
4086 if (command->len < sizeof (raw) + 8)
4087 return FALSE;
4088 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4089 return FALSE;
4090
4091 nameoff = bfd_h_get_32 (abfd, raw.name);
4092 modoff = bfd_h_get_32 (abfd, raw.linked_modules);
4093 if (nameoff > command->len || modoff > command->len)
4094 return FALSE;
4095
4096 str_len = command->len - sizeof (raw);
4097 str = bfd_alloc (abfd, str_len);
4098 if (str == NULL)
4099 return FALSE;
4100 if (bfd_bread (str, str_len, abfd) != str_len)
4101 return FALSE;
4102
4103 cmd->name_offset = command->offset + nameoff;
4104 cmd->nmodules = bfd_h_get_32 (abfd, raw.nmodules);
4105 cmd->linked_modules_offset = command->offset + modoff;
4106
4107 cmd->name_str = (char *)str + nameoff - (sizeof (raw) + BFD_MACH_O_LC_SIZE);
4108 cmd->linked_modules = str + modoff - (sizeof (raw) + BFD_MACH_O_LC_SIZE);
4109 return TRUE;
4110 }
4111
4112 static bfd_boolean
4113 bfd_mach_o_read_prebind_cksum (bfd *abfd,
4114 bfd_mach_o_load_command *command)
4115 {
4116 bfd_mach_o_prebind_cksum_command *cmd = &command->command.prebind_cksum;
4117 struct mach_o_prebind_cksum_command_external raw;
4118
4119 if (command->len < sizeof (raw) + 8)
4120 return FALSE;
4121 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4122 return FALSE;
4123
4124 cmd->cksum = bfd_get_32 (abfd, raw.cksum);
4125 return TRUE;
4126 }
4127
4128 static bfd_boolean
4129 bfd_mach_o_read_twolevel_hints (bfd *abfd,
4130 bfd_mach_o_load_command *command)
4131 {
4132 bfd_mach_o_twolevel_hints_command *cmd = &command->command.twolevel_hints;
4133 struct mach_o_twolevel_hints_command_external raw;
4134
4135 if (command->len < sizeof (raw) + 8)
4136 return FALSE;
4137 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4138 return FALSE;
4139
4140 cmd->offset = bfd_get_32 (abfd, raw.offset);
4141 cmd->nhints = bfd_get_32 (abfd, raw.nhints);
4142 return TRUE;
4143 }
4144
4145 static bfd_boolean
4146 bfd_mach_o_read_fvmlib (bfd *abfd, bfd_mach_o_load_command *command)
4147 {
4148 bfd_mach_o_fvmlib_command *fvm = &command->command.fvmlib;
4149 struct mach_o_fvmlib_command_external raw;
4150 unsigned int nameoff;
4151 unsigned int namelen;
4152
4153 if (command->len < sizeof (raw) + 8)
4154 return FALSE;
4155 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4156 return FALSE;
4157
4158 nameoff = bfd_h_get_32 (abfd, raw.name);
4159 if (nameoff > command->len)
4160 return FALSE;
4161 fvm->minor_version = bfd_h_get_32 (abfd, raw.minor_version);
4162 fvm->header_addr = bfd_h_get_32 (abfd, raw.header_addr);
4163
4164 fvm->name_offset = command->offset + nameoff;
4165 namelen = command->len - nameoff;
4166 fvm->name_str = bfd_alloc (abfd, namelen);
4167 if (fvm->name_str == NULL)
4168 return FALSE;
4169 if (bfd_seek (abfd, fvm->name_offset, SEEK_SET) != 0
4170 || bfd_bread (fvm->name_str, namelen, abfd) != namelen)
4171 return FALSE;
4172 return TRUE;
4173 }
4174
4175 static bfd_boolean
4176 bfd_mach_o_read_thread (bfd *abfd, bfd_mach_o_load_command *command)
4177 {
4178 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4179 bfd_mach_o_thread_command *cmd = &command->command.thread;
4180 unsigned int offset;
4181 unsigned int nflavours;
4182 unsigned int i;
4183 struct mach_o_thread_command_external raw;
4184 size_t amt;
4185
4186 BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD)
4187 || (command->type == BFD_MACH_O_LC_UNIXTHREAD));
4188
4189 /* Count the number of threads. */
4190 offset = 8;
4191 nflavours = 0;
4192 while (offset + sizeof (raw) <= command->len)
4193 {
4194 unsigned int count;
4195
4196 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
4197 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4198 return FALSE;
4199
4200 count = bfd_h_get_32 (abfd, raw.count);
4201 if (count > (unsigned) -1 / 4
4202 || command->len - (offset + sizeof (raw)) < count * 4)
4203 return FALSE;
4204 offset += sizeof (raw) + count * 4;
4205 nflavours++;
4206 }
4207 if (nflavours == 0 || offset != command->len)
4208 return FALSE;
4209
4210 /* Allocate threads. */
4211 if (_bfd_mul_overflow (nflavours, sizeof (bfd_mach_o_thread_flavour), &amt))
4212 {
4213 bfd_set_error (bfd_error_file_too_big);
4214 return FALSE;
4215 }
4216 cmd->flavours = bfd_alloc (abfd, amt);
4217 if (cmd->flavours == NULL)
4218 return FALSE;
4219 cmd->nflavours = nflavours;
4220
4221 offset = 8;
4222 nflavours = 0;
4223 while (offset != command->len)
4224 {
4225 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
4226 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4227 return FALSE;
4228
4229 cmd->flavours[nflavours].flavour = bfd_h_get_32 (abfd, raw.flavour);
4230 cmd->flavours[nflavours].offset = command->offset + offset + sizeof (raw);
4231 cmd->flavours[nflavours].size = bfd_h_get_32 (abfd, raw.count) * 4;
4232 offset += cmd->flavours[nflavours].size + sizeof (raw);
4233 nflavours++;
4234 }
4235
4236 for (i = 0; i < nflavours; i++)
4237 {
4238 asection *bfdsec;
4239 unsigned int snamelen;
4240 char *sname;
4241 const char *flavourstr;
4242 const char *prefix = "LC_THREAD";
4243 unsigned int j = 0;
4244
4245 switch (mdata->header.cputype)
4246 {
4247 case BFD_MACH_O_CPU_TYPE_POWERPC:
4248 case BFD_MACH_O_CPU_TYPE_POWERPC_64:
4249 flavourstr =
4250 bfd_mach_o_ppc_flavour_string (cmd->flavours[i].flavour);
4251 break;
4252 case BFD_MACH_O_CPU_TYPE_I386:
4253 case BFD_MACH_O_CPU_TYPE_X86_64:
4254 flavourstr =
4255 bfd_mach_o_i386_flavour_string (cmd->flavours[i].flavour);
4256 break;
4257 default:
4258 flavourstr = "UNKNOWN_ARCHITECTURE";
4259 break;
4260 }
4261
4262 snamelen = strlen (prefix) + 1 + 20 + 1 + strlen (flavourstr) + 1;
4263 sname = bfd_alloc (abfd, snamelen);
4264 if (sname == NULL)
4265 return FALSE;
4266
4267 for (;;)
4268 {
4269 sprintf (sname, "%s.%s.%u", prefix, flavourstr, j);
4270 if (bfd_get_section_by_name (abfd, sname) == NULL)
4271 break;
4272 j++;
4273 }
4274
4275 bfdsec = bfd_make_section_with_flags (abfd, sname, SEC_HAS_CONTENTS);
4276
4277 bfdsec->vma = 0;
4278 bfdsec->lma = 0;
4279 bfdsec->size = cmd->flavours[i].size;
4280 bfdsec->filepos = cmd->flavours[i].offset;
4281 bfdsec->alignment_power = 0x0;
4282
4283 cmd->section = bfdsec;
4284 }
4285
4286 return TRUE;
4287 }
4288
4289 static bfd_boolean
4290 bfd_mach_o_read_dysymtab (bfd *abfd, bfd_mach_o_load_command *command)
4291 {
4292 bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab;
4293 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4294
4295 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB);
4296
4297 {
4298 struct mach_o_dysymtab_command_external raw;
4299
4300 if (command->len < sizeof (raw) + 8)
4301 return FALSE;
4302 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4303 return FALSE;
4304
4305 cmd->ilocalsym = bfd_h_get_32 (abfd, raw.ilocalsym);
4306 cmd->nlocalsym = bfd_h_get_32 (abfd, raw.nlocalsym);
4307 cmd->iextdefsym = bfd_h_get_32 (abfd, raw.iextdefsym);
4308 cmd->nextdefsym = bfd_h_get_32 (abfd, raw.nextdefsym);
4309 cmd->iundefsym = bfd_h_get_32 (abfd, raw.iundefsym);
4310 cmd->nundefsym = bfd_h_get_32 (abfd, raw.nundefsym);
4311 cmd->tocoff = bfd_h_get_32 (abfd, raw.tocoff);
4312 cmd->ntoc = bfd_h_get_32 (abfd, raw.ntoc);
4313 cmd->modtaboff = bfd_h_get_32 (abfd, raw.modtaboff);
4314 cmd->nmodtab = bfd_h_get_32 (abfd, raw.nmodtab);
4315 cmd->extrefsymoff = bfd_h_get_32 (abfd, raw.extrefsymoff);
4316 cmd->nextrefsyms = bfd_h_get_32 (abfd, raw.nextrefsyms);
4317 cmd->indirectsymoff = bfd_h_get_32 (abfd, raw.indirectsymoff);
4318 cmd->nindirectsyms = bfd_h_get_32 (abfd, raw.nindirectsyms);
4319 cmd->extreloff = bfd_h_get_32 (abfd, raw.extreloff);
4320 cmd->nextrel = bfd_h_get_32 (abfd, raw.nextrel);
4321 cmd->locreloff = bfd_h_get_32 (abfd, raw.locreloff);
4322 cmd->nlocrel = bfd_h_get_32 (abfd, raw.nlocrel);
4323 }
4324
4325 if (cmd->nmodtab != 0)
4326 {
4327 unsigned int i;
4328 int wide = bfd_mach_o_wide_p (abfd);
4329 unsigned int module_len = wide ? 56 : 52;
4330 size_t amt;
4331
4332 if (_bfd_mul_overflow (cmd->nmodtab,
4333 sizeof (bfd_mach_o_dylib_module), &amt))
4334 {
4335 bfd_set_error (bfd_error_file_too_big);
4336 return FALSE;
4337 }
4338 cmd->dylib_module = bfd_alloc (abfd, amt);
4339 if (cmd->dylib_module == NULL)
4340 return FALSE;
4341
4342 if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0)
4343 return FALSE;
4344
4345 for (i = 0; i < cmd->nmodtab; i++)
4346 {
4347 bfd_mach_o_dylib_module *module = &cmd->dylib_module[i];
4348 unsigned long v;
4349 unsigned char buf[56];
4350
4351 if (bfd_bread ((void *) buf, module_len, abfd) != module_len)
4352 return FALSE;
4353
4354 module->module_name_idx = bfd_h_get_32 (abfd, buf + 0);
4355 module->iextdefsym = bfd_h_get_32 (abfd, buf + 4);
4356 module->nextdefsym = bfd_h_get_32 (abfd, buf + 8);
4357 module->irefsym = bfd_h_get_32 (abfd, buf + 12);
4358 module->nrefsym = bfd_h_get_32 (abfd, buf + 16);
4359 module->ilocalsym = bfd_h_get_32 (abfd, buf + 20);
4360 module->nlocalsym = bfd_h_get_32 (abfd, buf + 24);
4361 module->iextrel = bfd_h_get_32 (abfd, buf + 28);
4362 module->nextrel = bfd_h_get_32 (abfd, buf + 32);
4363 v = bfd_h_get_32 (abfd, buf +36);
4364 module->iinit = v & 0xffff;
4365 module->iterm = (v >> 16) & 0xffff;
4366 v = bfd_h_get_32 (abfd, buf + 40);
4367 module->ninit = v & 0xffff;
4368 module->nterm = (v >> 16) & 0xffff;
4369 if (wide)
4370 {
4371 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 44);
4372 module->objc_module_info_addr = bfd_h_get_64 (abfd, buf + 48);
4373 }
4374 else
4375 {
4376 module->objc_module_info_addr = bfd_h_get_32 (abfd, buf + 44);
4377 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 48);
4378 }
4379 }
4380 }
4381
4382 if (cmd->ntoc != 0)
4383 {
4384 unsigned long i;
4385 size_t amt;
4386
4387 if (_bfd_mul_overflow (cmd->ntoc,
4388 sizeof (bfd_mach_o_dylib_table_of_content), &amt))
4389 {
4390 bfd_set_error (bfd_error_file_too_big);
4391 return FALSE;
4392 }
4393 cmd->dylib_toc = bfd_alloc (abfd, amt);
4394 if (cmd->dylib_toc == NULL)
4395 return FALSE;
4396
4397 if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0)
4398 return FALSE;
4399
4400 for (i = 0; i < cmd->ntoc; i++)
4401 {
4402 struct mach_o_dylib_table_of_contents_external raw;
4403 bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i];
4404
4405 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4406 return FALSE;
4407
4408 toc->symbol_index = bfd_h_get_32 (abfd, raw.symbol_index);
4409 toc->module_index = bfd_h_get_32 (abfd, raw.module_index);
4410 }
4411 }
4412
4413 if (cmd->nindirectsyms != 0)
4414 {
4415 unsigned int i;
4416 size_t amt;
4417
4418 if (_bfd_mul_overflow (cmd->nindirectsyms, sizeof (unsigned int), &amt))
4419 {
4420 bfd_set_error (bfd_error_file_too_big);
4421 return FALSE;
4422 }
4423 cmd->indirect_syms = bfd_alloc (abfd, amt);
4424 if (cmd->indirect_syms == NULL)
4425 return FALSE;
4426
4427 if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0)
4428 return FALSE;
4429
4430 for (i = 0; i < cmd->nindirectsyms; i++)
4431 {
4432 unsigned char raw[4];
4433 unsigned int *is = &cmd->indirect_syms[i];
4434
4435 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw))
4436 return FALSE;
4437
4438 *is = bfd_h_get_32 (abfd, raw);
4439 }
4440 }
4441
4442 if (cmd->nextrefsyms != 0)
4443 {
4444 unsigned long v;
4445 unsigned int i;
4446 size_t amt;
4447
4448 if (_bfd_mul_overflow (cmd->nextrefsyms,
4449 sizeof (bfd_mach_o_dylib_reference), &amt))
4450 {
4451 bfd_set_error (bfd_error_file_too_big);
4452 return FALSE;
4453 }
4454 cmd->ext_refs = bfd_alloc (abfd, amt);
4455 if (cmd->ext_refs == NULL)
4456 return FALSE;
4457
4458 if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0)
4459 return FALSE;
4460
4461 for (i = 0; i < cmd->nextrefsyms; i++)
4462 {
4463 unsigned char raw[4];
4464 bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i];
4465
4466 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw))
4467 return FALSE;
4468
4469 /* Fields isym and flags are written as bit-fields, thus we need
4470 a specific processing for endianness. */
4471 v = bfd_h_get_32 (abfd, raw);
4472 if (bfd_big_endian (abfd))
4473 {
4474 ref->isym = (v >> 8) & 0xffffff;
4475 ref->flags = v & 0xff;
4476 }
4477 else
4478 {
4479 ref->isym = v & 0xffffff;
4480 ref->flags = (v >> 24) & 0xff;
4481 }
4482 }
4483 }
4484
4485 if (mdata->dysymtab)
4486 return FALSE;
4487 mdata->dysymtab = cmd;
4488
4489 return TRUE;
4490 }
4491
4492 static bfd_boolean
4493 bfd_mach_o_read_symtab (bfd *abfd, bfd_mach_o_load_command *command)
4494 {
4495 bfd_mach_o_symtab_command *symtab = &command->command.symtab;
4496 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4497 struct mach_o_symtab_command_external raw;
4498
4499 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB);
4500
4501 if (command->len < sizeof (raw) + 8)
4502 return FALSE;
4503 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4504 return FALSE;
4505
4506 symtab->symoff = bfd_h_get_32 (abfd, raw.symoff);
4507 symtab->nsyms = bfd_h_get_32 (abfd, raw.nsyms);
4508 symtab->stroff = bfd_h_get_32 (abfd, raw.stroff);
4509 symtab->strsize = bfd_h_get_32 (abfd, raw.strsize);
4510 symtab->symbols = NULL;
4511 symtab->strtab = NULL;
4512
4513 if (symtab->nsyms != 0)
4514 abfd->flags |= HAS_SYMS;
4515
4516 if (mdata->symtab)
4517 return FALSE;
4518 mdata->symtab = symtab;
4519 return TRUE;
4520 }
4521
4522 static bfd_boolean
4523 bfd_mach_o_read_uuid (bfd *abfd, bfd_mach_o_load_command *command)
4524 {
4525 bfd_mach_o_uuid_command *cmd = &command->command.uuid;
4526
4527 BFD_ASSERT (command->type == BFD_MACH_O_LC_UUID);
4528
4529 if (command->len < 16 + 8)
4530 return FALSE;
4531 if (bfd_bread (cmd->uuid, 16, abfd) != 16)
4532 return FALSE;
4533
4534 return TRUE;
4535 }
4536
4537 static bfd_boolean
4538 bfd_mach_o_read_linkedit (bfd *abfd, bfd_mach_o_load_command *command)
4539 {
4540 bfd_mach_o_linkedit_command *cmd = &command->command.linkedit;
4541 struct mach_o_linkedit_data_command_external raw;
4542
4543 if (command->len < sizeof (raw) + 8)
4544 return FALSE;
4545 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4546 return FALSE;
4547
4548 cmd->dataoff = bfd_get_32 (abfd, raw.dataoff);
4549 cmd->datasize = bfd_get_32 (abfd, raw.datasize);
4550 return TRUE;
4551 }
4552
4553 static bfd_boolean
4554 bfd_mach_o_read_str (bfd *abfd, bfd_mach_o_load_command *command)
4555 {
4556 bfd_mach_o_str_command *cmd = &command->command.str;
4557 struct mach_o_str_command_external raw;
4558 unsigned long off;
4559
4560 if (command->len < sizeof (raw) + 8)
4561 return FALSE;
4562 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4563 return FALSE;
4564
4565 off = bfd_get_32 (abfd, raw.str);
4566 if (off > command->len)
4567 return FALSE;
4568
4569 cmd->stroff = command->offset + off;
4570 cmd->str_len = command->len - off;
4571 cmd->str = bfd_alloc (abfd, cmd->str_len);
4572 if (cmd->str == NULL)
4573 return FALSE;
4574 if (bfd_seek (abfd, cmd->stroff, SEEK_SET) != 0
4575 || bfd_bread ((void *) cmd->str, cmd->str_len, abfd) != cmd->str_len)
4576 return FALSE;
4577 return TRUE;
4578 }
4579
4580 static unsigned char *
4581 bfd_mach_o_alloc_and_read (bfd *abfd, unsigned int off, unsigned int size)
4582 {
4583 unsigned char *buf;
4584
4585 buf = bfd_alloc (abfd, size);
4586 if (buf == NULL)
4587 return NULL;
4588 if (bfd_seek (abfd, off, SEEK_SET) != 0
4589 || bfd_bread (buf, size, abfd) != size)
4590 return NULL;
4591 return buf;
4592 }
4593
4594 static bfd_boolean
4595 bfd_mach_o_read_dyld_content (bfd *abfd, bfd_mach_o_dyld_info_command *cmd)
4596 {
4597 /* Read rebase content. */
4598 if (cmd->rebase_content == NULL && cmd->rebase_size != 0)
4599 {
4600 cmd->rebase_content =
4601 bfd_mach_o_alloc_and_read (abfd, cmd->rebase_off, cmd->rebase_size);
4602 if (cmd->rebase_content == NULL)
4603 return FALSE;
4604 }
4605
4606 /* Read bind content. */
4607 if (cmd->bind_content == NULL && cmd->bind_size != 0)
4608 {
4609 cmd->bind_content =
4610 bfd_mach_o_alloc_and_read (abfd, cmd->bind_off, cmd->bind_size);
4611 if (cmd->bind_content == NULL)
4612 return FALSE;
4613 }
4614
4615 /* Read weak bind content. */
4616 if (cmd->weak_bind_content == NULL && cmd->weak_bind_size != 0)
4617 {
4618 cmd->weak_bind_content = bfd_mach_o_alloc_and_read
4619 (abfd, cmd->weak_bind_off, cmd->weak_bind_size);
4620 if (cmd->weak_bind_content == NULL)
4621 return FALSE;
4622 }
4623
4624 /* Read lazy bind content. */
4625 if (cmd->lazy_bind_content == NULL && cmd->lazy_bind_size != 0)
4626 {
4627 cmd->lazy_bind_content = bfd_mach_o_alloc_and_read
4628 (abfd, cmd->lazy_bind_off, cmd->lazy_bind_size);
4629 if (cmd->lazy_bind_content == NULL)
4630 return FALSE;
4631 }
4632
4633 /* Read export content. */
4634 if (cmd->export_content == NULL && cmd->export_size != 0)
4635 {
4636 cmd->export_content = bfd_mach_o_alloc_and_read
4637 (abfd, cmd->export_off, cmd->export_size);
4638 if (cmd->export_content == NULL)
4639 return FALSE;
4640 }
4641
4642 return TRUE;
4643 }
4644
4645 static bfd_boolean
4646 bfd_mach_o_read_dyld_info (bfd *abfd, bfd_mach_o_load_command *command)
4647 {
4648 bfd_mach_o_dyld_info_command *cmd = &command->command.dyld_info;
4649 struct mach_o_dyld_info_command_external raw;
4650
4651 if (command->len < sizeof (raw) + 8)
4652 return FALSE;
4653 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4654 return FALSE;
4655
4656 cmd->rebase_off = bfd_get_32 (abfd, raw.rebase_off);
4657 cmd->rebase_size = bfd_get_32 (abfd, raw.rebase_size);
4658 cmd->rebase_content = NULL;
4659 cmd->bind_off = bfd_get_32 (abfd, raw.bind_off);
4660 cmd->bind_size = bfd_get_32 (abfd, raw.bind_size);
4661 cmd->bind_content = NULL;
4662 cmd->weak_bind_off = bfd_get_32 (abfd, raw.weak_bind_off);
4663 cmd->weak_bind_size = bfd_get_32 (abfd, raw.weak_bind_size);
4664 cmd->weak_bind_content = NULL;
4665 cmd->lazy_bind_off = bfd_get_32 (abfd, raw.lazy_bind_off);
4666 cmd->lazy_bind_size = bfd_get_32 (abfd, raw.lazy_bind_size);
4667 cmd->lazy_bind_content = NULL;
4668 cmd->export_off = bfd_get_32 (abfd, raw.export_off);
4669 cmd->export_size = bfd_get_32 (abfd, raw.export_size);
4670 cmd->export_content = NULL;
4671 return TRUE;
4672 }
4673
4674 static bfd_boolean
4675 bfd_mach_o_read_version_min (bfd *abfd, bfd_mach_o_load_command *command)
4676 {
4677 bfd_mach_o_version_min_command *cmd = &command->command.version_min;
4678 struct mach_o_version_min_command_external raw;
4679
4680 if (command->len < sizeof (raw) + 8)
4681 return FALSE;
4682 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4683 return FALSE;
4684
4685 cmd->version = bfd_get_32 (abfd, raw.version);
4686 cmd->sdk = bfd_get_32 (abfd, raw.sdk);
4687 return TRUE;
4688 }
4689
4690 static bfd_boolean
4691 bfd_mach_o_read_encryption_info (bfd *abfd, bfd_mach_o_load_command *command)
4692 {
4693 bfd_mach_o_encryption_info_command *cmd = &command->command.encryption_info;
4694 struct mach_o_encryption_info_command_external raw;
4695
4696 if (command->len < sizeof (raw) + 8)
4697 return FALSE;
4698 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4699 return FALSE;
4700
4701 cmd->cryptoff = bfd_get_32 (abfd, raw.cryptoff);
4702 cmd->cryptsize = bfd_get_32 (abfd, raw.cryptsize);
4703 cmd->cryptid = bfd_get_32 (abfd, raw.cryptid);
4704 return TRUE;
4705 }
4706
4707 static bfd_boolean
4708 bfd_mach_o_read_encryption_info_64 (bfd *abfd, bfd_mach_o_load_command *command)
4709 {
4710 bfd_mach_o_encryption_info_command *cmd = &command->command.encryption_info;
4711 struct mach_o_encryption_info_64_command_external raw;
4712
4713 if (command->len < sizeof (raw) + 8)
4714 return FALSE;
4715 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4716 return FALSE;
4717
4718 cmd->cryptoff = bfd_get_32 (abfd, raw.cryptoff);
4719 cmd->cryptsize = bfd_get_32 (abfd, raw.cryptsize);
4720 cmd->cryptid = bfd_get_32 (abfd, raw.cryptid);
4721 return TRUE;
4722 }
4723
4724 static bfd_boolean
4725 bfd_mach_o_read_main (bfd *abfd, bfd_mach_o_load_command *command)
4726 {
4727 bfd_mach_o_main_command *cmd = &command->command.main;
4728 struct mach_o_entry_point_command_external raw;
4729
4730 if (command->len < sizeof (raw) + 8)
4731 return FALSE;
4732 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4733 return FALSE;
4734
4735 cmd->entryoff = bfd_get_64 (abfd, raw.entryoff);
4736 cmd->stacksize = bfd_get_64 (abfd, raw.stacksize);
4737 return TRUE;
4738 }
4739
4740 static bfd_boolean
4741 bfd_mach_o_read_source_version (bfd *abfd, bfd_mach_o_load_command *command)
4742 {
4743 bfd_mach_o_source_version_command *cmd = &command->command.source_version;
4744 struct mach_o_source_version_command_external raw;
4745 bfd_uint64_t ver;
4746
4747 if (command->len < sizeof (raw) + 8)
4748 return FALSE;
4749 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4750 return FALSE;
4751
4752 ver = bfd_get_64 (abfd, raw.version);
4753 /* Note: we use a serie of shift to avoid shift > 32 (for which gcc
4754 generates warnings) in case of the host doesn't support 64 bit
4755 integers. */
4756 cmd->e = ver & 0x3ff;
4757 ver >>= 10;
4758 cmd->d = ver & 0x3ff;
4759 ver >>= 10;
4760 cmd->c = ver & 0x3ff;
4761 ver >>= 10;
4762 cmd->b = ver & 0x3ff;
4763 ver >>= 10;
4764 cmd->a = ver & 0xffffff;
4765 return TRUE;
4766 }
4767
4768 static bfd_boolean
4769 bfd_mach_o_read_note (bfd *abfd, bfd_mach_o_load_command *command)
4770 {
4771 bfd_mach_o_note_command *cmd = &command->command.note;
4772 struct mach_o_note_command_external raw;
4773
4774 if (command->len < sizeof (raw) + 8)
4775 return FALSE;
4776 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4777 return FALSE;
4778
4779 memcpy (cmd->data_owner, raw.data_owner, 16);
4780 cmd->offset = bfd_get_64 (abfd, raw.offset);
4781 cmd->size = bfd_get_64 (abfd, raw.size);
4782 return TRUE;
4783 }
4784
4785 static bfd_boolean
4786 bfd_mach_o_read_build_version (bfd *abfd, bfd_mach_o_load_command *command)
4787 {
4788 bfd_mach_o_build_version_command *cmd = &command->command.build_version;
4789 struct mach_o_build_version_command_external raw;
4790
4791 if (command->len < sizeof (raw) + 8)
4792 return FALSE;
4793 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4794 return FALSE;
4795
4796 cmd->platform = bfd_get_32 (abfd, raw.platform);
4797 cmd->minos = bfd_get_32 (abfd, raw.minos);
4798 cmd->sdk = bfd_get_32 (abfd, raw.sdk);
4799 cmd->ntools = bfd_get_32 (abfd, raw.ntools);
4800 return TRUE;
4801 }
4802
4803 static bfd_boolean
4804 bfd_mach_o_read_segment (bfd *abfd,
4805 bfd_mach_o_load_command *command,
4806 unsigned int wide)
4807 {
4808 bfd_mach_o_segment_command *seg = &command->command.segment;
4809 unsigned long i;
4810
4811 if (wide)
4812 {
4813 struct mach_o_segment_command_64_external raw;
4814
4815 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64);
4816
4817 if (command->len < sizeof (raw) + 8)
4818 return FALSE;
4819 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4820 return FALSE;
4821
4822 memcpy (seg->segname, raw.segname, 16);
4823 seg->segname[16] = '\0';
4824
4825 seg->vmaddr = bfd_h_get_64 (abfd, raw.vmaddr);
4826 seg->vmsize = bfd_h_get_64 (abfd, raw.vmsize);
4827 seg->fileoff = bfd_h_get_64 (abfd, raw.fileoff);
4828 seg->filesize = bfd_h_get_64 (abfd, raw.filesize);
4829 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot);
4830 seg->initprot = bfd_h_get_32 (abfd, raw.initprot);
4831 seg->nsects = bfd_h_get_32 (abfd, raw.nsects);
4832 seg->flags = bfd_h_get_32 (abfd, raw.flags);
4833 }
4834 else
4835 {
4836 struct mach_o_segment_command_32_external raw;
4837
4838 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT);
4839
4840 if (command->len < sizeof (raw) + 8)
4841 return FALSE;
4842 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4843 return FALSE;
4844
4845 memcpy (seg->segname, raw.segname, 16);
4846 seg->segname[16] = '\0';
4847
4848 seg->vmaddr = bfd_h_get_32 (abfd, raw.vmaddr);
4849 seg->vmsize = bfd_h_get_32 (abfd, raw.vmsize);
4850 seg->fileoff = bfd_h_get_32 (abfd, raw.fileoff);
4851 seg->filesize = bfd_h_get_32 (abfd, raw.filesize);
4852 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot);
4853 seg->initprot = bfd_h_get_32 (abfd, raw.initprot);
4854 seg->nsects = bfd_h_get_32 (abfd, raw.nsects);
4855 seg->flags = bfd_h_get_32 (abfd, raw.flags);
4856 }
4857 seg->sect_head = NULL;
4858 seg->sect_tail = NULL;
4859
4860 for (i = 0; i < seg->nsects; i++)
4861 {
4862 asection *sec;
4863
4864 sec = bfd_mach_o_read_section (abfd, seg->initprot, wide);
4865 if (sec == NULL)
4866 return FALSE;
4867
4868 bfd_mach_o_append_section_to_segment
4869 (seg, bfd_mach_o_get_mach_o_section (sec));
4870 }
4871
4872 return TRUE;
4873 }
4874
4875 static bfd_boolean
4876 bfd_mach_o_read_segment_32 (bfd *abfd, bfd_mach_o_load_command *command)
4877 {
4878 return bfd_mach_o_read_segment (abfd, command, 0);
4879 }
4880
4881 static bfd_boolean
4882 bfd_mach_o_read_segment_64 (bfd *abfd, bfd_mach_o_load_command *command)
4883 {
4884 return bfd_mach_o_read_segment (abfd, command, 1);
4885 }
4886
4887 static bfd_boolean
4888 bfd_mach_o_read_command (bfd *abfd, bfd_mach_o_load_command *command)
4889 {
4890 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4891 struct mach_o_load_command_external raw;
4892 unsigned int cmd;
4893
4894 /* Read command type and length. */
4895 if (bfd_seek (abfd, mdata->hdr_offset + command->offset, SEEK_SET) != 0
4896 || bfd_bread (&raw, BFD_MACH_O_LC_SIZE, abfd) != BFD_MACH_O_LC_SIZE)
4897 return FALSE;
4898
4899 cmd = bfd_h_get_32 (abfd, raw.cmd);
4900 command->type = cmd & ~BFD_MACH_O_LC_REQ_DYLD;
4901 command->type_required = cmd & BFD_MACH_O_LC_REQ_DYLD ? TRUE : FALSE;
4902 command->len = bfd_h_get_32 (abfd, raw.cmdsize);
4903 if (command->len < 8 || command->len % 4 != 0)
4904 return FALSE;
4905
4906 switch (command->type)
4907 {
4908 case BFD_MACH_O_LC_SEGMENT:
4909 if (!bfd_mach_o_read_segment_32 (abfd, command))
4910 return FALSE;
4911 break;
4912 case BFD_MACH_O_LC_SEGMENT_64:
4913 if (!bfd_mach_o_read_segment_64 (abfd, command))
4914 return FALSE;
4915 break;
4916 case BFD_MACH_O_LC_SYMTAB:
4917 if (!bfd_mach_o_read_symtab (abfd, command))
4918 return FALSE;
4919 break;
4920 case BFD_MACH_O_LC_SYMSEG:
4921 break;
4922 case BFD_MACH_O_LC_THREAD:
4923 case BFD_MACH_O_LC_UNIXTHREAD:
4924 if (!bfd_mach_o_read_thread (abfd, command))
4925 return FALSE;
4926 break;
4927 case BFD_MACH_O_LC_LOAD_DYLINKER:
4928 case BFD_MACH_O_LC_ID_DYLINKER:
4929 case BFD_MACH_O_LC_DYLD_ENVIRONMENT:
4930 if (!bfd_mach_o_read_dylinker (abfd, command))
4931 return FALSE;
4932 break;
4933 case BFD_MACH_O_LC_LOAD_DYLIB:
4934 case BFD_MACH_O_LC_LAZY_LOAD_DYLIB:
4935 case BFD_MACH_O_LC_ID_DYLIB:
4936 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
4937 case BFD_MACH_O_LC_REEXPORT_DYLIB:
4938 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
4939 if (!bfd_mach_o_read_dylib (abfd, command))
4940 return FALSE;
4941 break;
4942 case BFD_MACH_O_LC_PREBOUND_DYLIB:
4943 if (!bfd_mach_o_read_prebound_dylib (abfd, command))
4944 return FALSE;
4945 break;
4946 case BFD_MACH_O_LC_LOADFVMLIB:
4947 case BFD_MACH_O_LC_IDFVMLIB:
4948 if (!bfd_mach_o_read_fvmlib (abfd, command))
4949 return FALSE;
4950 break;
4951 case BFD_MACH_O_LC_IDENT:
4952 case BFD_MACH_O_LC_FVMFILE:
4953 case BFD_MACH_O_LC_PREPAGE:
4954 case BFD_MACH_O_LC_ROUTINES:
4955 case BFD_MACH_O_LC_ROUTINES_64:
4956 break;
4957 case BFD_MACH_O_LC_SUB_FRAMEWORK:
4958 case BFD_MACH_O_LC_SUB_UMBRELLA:
4959 case BFD_MACH_O_LC_SUB_LIBRARY:
4960 case BFD_MACH_O_LC_SUB_CLIENT:
4961 case BFD_MACH_O_LC_RPATH:
4962 if (!bfd_mach_o_read_str (abfd, command))
4963 return FALSE;
4964 break;
4965 case BFD_MACH_O_LC_DYSYMTAB:
4966 if (!bfd_mach_o_read_dysymtab (abfd, command))
4967 return FALSE;
4968 break;
4969 case BFD_MACH_O_LC_PREBIND_CKSUM:
4970 if (!bfd_mach_o_read_prebind_cksum (abfd, command))
4971 return FALSE;
4972 break;
4973 case BFD_MACH_O_LC_TWOLEVEL_HINTS:
4974 if (!bfd_mach_o_read_twolevel_hints (abfd, command))
4975 return FALSE;
4976 break;
4977 case BFD_MACH_O_LC_UUID:
4978 if (!bfd_mach_o_read_uuid (abfd, command))
4979 return FALSE;
4980 break;
4981 case BFD_MACH_O_LC_CODE_SIGNATURE:
4982 case BFD_MACH_O_LC_SEGMENT_SPLIT_INFO:
4983 case BFD_MACH_O_LC_FUNCTION_STARTS:
4984 case BFD_MACH_O_LC_DATA_IN_CODE:
4985 case BFD_MACH_O_LC_DYLIB_CODE_SIGN_DRS:
4986 case BFD_MACH_O_LC_LINKER_OPTIMIZATION_HINT:
4987 if (!bfd_mach_o_read_linkedit (abfd, command))
4988 return FALSE;
4989 break;
4990 case BFD_MACH_O_LC_ENCRYPTION_INFO:
4991 if (!bfd_mach_o_read_encryption_info (abfd, command))
4992 return FALSE;
4993 break;
4994 case BFD_MACH_O_LC_ENCRYPTION_INFO_64:
4995 if (!bfd_mach_o_read_encryption_info_64 (abfd, command))
4996 return FALSE;
4997 break;
4998 case BFD_MACH_O_LC_DYLD_INFO:
4999 if (!bfd_mach_o_read_dyld_info (abfd, command))
5000 return FALSE;
5001 break;
5002 case BFD_MACH_O_LC_VERSION_MIN_MACOSX:
5003 case BFD_MACH_O_LC_VERSION_MIN_IPHONEOS:
5004 case BFD_MACH_O_LC_VERSION_MIN_WATCHOS:
5005 case BFD_MACH_O_LC_VERSION_MIN_TVOS:
5006 if (!bfd_mach_o_read_version_min (abfd, command))
5007 return FALSE;
5008 break;
5009 case BFD_MACH_O_LC_MAIN:
5010 if (!bfd_mach_o_read_main (abfd, command))
5011 return FALSE;
5012 break;
5013 case BFD_MACH_O_LC_SOURCE_VERSION:
5014 if (!bfd_mach_o_read_source_version (abfd, command))
5015 return FALSE;
5016 break;
5017 case BFD_MACH_O_LC_LINKER_OPTIONS:
5018 break;
5019 case BFD_MACH_O_LC_NOTE:
5020 if (!bfd_mach_o_read_note (abfd, command))
5021 return FALSE;
5022 break;
5023 case BFD_MACH_O_LC_BUILD_VERSION:
5024 if (!bfd_mach_o_read_build_version (abfd, command))
5025 return FALSE;
5026 break;
5027 default:
5028 command->len = 0;
5029 _bfd_error_handler (_("%pB: unknown load command %#x"),
5030 abfd, command->type);
5031 return FALSE;
5032 }
5033
5034 return TRUE;
5035 }
5036
5037 static bfd_boolean
5038 bfd_mach_o_flatten_sections (bfd *abfd)
5039 {
5040 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5041 bfd_mach_o_load_command *cmd;
5042 long csect = 0;
5043 size_t amt;
5044
5045 /* Count total number of sections. */
5046 mdata->nsects = 0;
5047
5048 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5049 {
5050 if (cmd->type == BFD_MACH_O_LC_SEGMENT
5051 || cmd->type == BFD_MACH_O_LC_SEGMENT_64)
5052 {
5053 bfd_mach_o_segment_command *seg = &cmd->command.segment;
5054
5055 mdata->nsects += seg->nsects;
5056 }
5057 }
5058
5059 /* Allocate sections array. */
5060 if (_bfd_mul_overflow (mdata->nsects, sizeof (bfd_mach_o_section *), &amt))
5061 {
5062 bfd_set_error (bfd_error_file_too_big);
5063 return FALSE;
5064 }
5065 mdata->sections = bfd_alloc (abfd, amt);
5066 if (mdata->sections == NULL && mdata->nsects != 0)
5067 return FALSE;
5068
5069 /* Fill the array. */
5070 csect = 0;
5071
5072 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5073 {
5074 if (cmd->type == BFD_MACH_O_LC_SEGMENT
5075 || cmd->type == BFD_MACH_O_LC_SEGMENT_64)
5076 {
5077 bfd_mach_o_segment_command *seg = &cmd->command.segment;
5078 bfd_mach_o_section *sec;
5079
5080 BFD_ASSERT (csect + seg->nsects <= mdata->nsects);
5081
5082 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
5083 mdata->sections[csect++] = sec;
5084 }
5085 }
5086 return TRUE;
5087 }
5088
5089 static bfd_boolean
5090 bfd_mach_o_scan_start_address (bfd *abfd)
5091 {
5092 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5093 bfd_mach_o_thread_command *thr = NULL;
5094 bfd_mach_o_load_command *cmd;
5095 unsigned long i;
5096
5097 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5098 if (cmd->type == BFD_MACH_O_LC_THREAD
5099 || cmd->type == BFD_MACH_O_LC_UNIXTHREAD)
5100 {
5101 thr = &cmd->command.thread;
5102 break;
5103 }
5104 else if (cmd->type == BFD_MACH_O_LC_MAIN && mdata->nsects > 1)
5105 {
5106 bfd_mach_o_main_command *main_cmd = &cmd->command.main;
5107 bfd_mach_o_section *text_sect = mdata->sections[0];
5108
5109 if (text_sect)
5110 {
5111 abfd->start_address = main_cmd->entryoff
5112 + (text_sect->addr - text_sect->offset);
5113 return TRUE;
5114 }
5115 }
5116
5117 /* An object file has no start address, so do not fail if not found. */
5118 if (thr == NULL)
5119 return TRUE;
5120
5121 /* FIXME: create a subtarget hook ? */
5122 for (i = 0; i < thr->nflavours; i++)
5123 {
5124 if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_I386)
5125 && (thr->flavours[i].flavour == BFD_MACH_O_x86_THREAD_STATE32))
5126 {
5127 unsigned char buf[4];
5128
5129 if (bfd_seek (abfd, thr->flavours[i].offset + 40, SEEK_SET) != 0
5130 || bfd_bread (buf, 4, abfd) != 4)
5131 return FALSE;
5132
5133 abfd->start_address = bfd_h_get_32 (abfd, buf);
5134 }
5135 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC)
5136 && (thr->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE))
5137 {
5138 unsigned char buf[4];
5139
5140 if (bfd_seek (abfd, thr->flavours[i].offset + 0, SEEK_SET) != 0
5141 || bfd_bread (buf, 4, abfd) != 4)
5142 return FALSE;
5143
5144 abfd->start_address = bfd_h_get_32 (abfd, buf);
5145 }
5146 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC_64)
5147 && (thr->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE64))
5148 {
5149 unsigned char buf[8];
5150
5151 if (bfd_seek (abfd, thr->flavours[i].offset + 0, SEEK_SET) != 0
5152 || bfd_bread (buf, 8, abfd) != 8)
5153 return FALSE;
5154
5155 abfd->start_address = bfd_h_get_64 (abfd, buf);
5156 }
5157 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_X86_64)
5158 && (thr->flavours[i].flavour == BFD_MACH_O_x86_THREAD_STATE64))
5159 {
5160 unsigned char buf[8];
5161
5162 if (bfd_seek (abfd, thr->flavours[i].offset + (16 * 8), SEEK_SET) != 0
5163 || bfd_bread (buf, 8, abfd) != 8)
5164 return FALSE;
5165
5166 abfd->start_address = bfd_h_get_64 (abfd, buf);
5167 }
5168 }
5169
5170 return TRUE;
5171 }
5172
5173 bfd_boolean
5174 bfd_mach_o_set_arch_mach (bfd *abfd,
5175 enum bfd_architecture arch,
5176 unsigned long machine)
5177 {
5178 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
5179
5180 /* If this isn't the right architecture for this backend, and this
5181 isn't the generic backend, fail. */
5182 if (arch != bed->arch
5183 && arch != bfd_arch_unknown
5184 && bed->arch != bfd_arch_unknown)
5185 return FALSE;
5186
5187 return bfd_default_set_arch_mach (abfd, arch, machine);
5188 }
5189
5190 static bfd_boolean
5191 bfd_mach_o_scan (bfd *abfd,
5192 bfd_mach_o_header *header,
5193 bfd_mach_o_data_struct *mdata)
5194 {
5195 unsigned int i;
5196 enum bfd_architecture cpu_type;
5197 unsigned long cpu_subtype;
5198 unsigned int hdrsize;
5199
5200 hdrsize = mach_o_wide_p (header) ?
5201 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
5202
5203 mdata->header = *header;
5204
5205 abfd->flags = abfd->flags & BFD_IN_MEMORY;
5206 switch (header->filetype)
5207 {
5208 case BFD_MACH_O_MH_OBJECT:
5209 abfd->flags |= HAS_RELOC;
5210 break;
5211 case BFD_MACH_O_MH_EXECUTE:
5212 abfd->flags |= EXEC_P;
5213 break;
5214 case BFD_MACH_O_MH_DYLIB:
5215 case BFD_MACH_O_MH_BUNDLE:
5216 abfd->flags |= DYNAMIC;
5217 break;
5218 }
5219
5220 abfd->tdata.mach_o_data = mdata;
5221
5222 bfd_mach_o_convert_architecture (header->cputype, header->cpusubtype,
5223 &cpu_type, &cpu_subtype);
5224 if (cpu_type == bfd_arch_unknown)
5225 {
5226 _bfd_error_handler
5227 /* xgettext:c-format */
5228 (_("bfd_mach_o_scan: unknown architecture 0x%lx/0x%lx"),
5229 header->cputype, header->cpusubtype);
5230 return FALSE;
5231 }
5232
5233 bfd_set_arch_mach (abfd, cpu_type, cpu_subtype);
5234
5235 if (header->ncmds != 0)
5236 {
5237 bfd_mach_o_load_command *cmd;
5238 size_t amt;
5239
5240 mdata->first_command = NULL;
5241 mdata->last_command = NULL;
5242
5243 if (_bfd_mul_overflow (header->ncmds,
5244 sizeof (bfd_mach_o_load_command), &amt))
5245 {
5246 bfd_set_error (bfd_error_file_too_big);
5247 return FALSE;
5248 }
5249 cmd = bfd_alloc (abfd, amt);
5250 if (cmd == NULL)
5251 return FALSE;
5252
5253 for (i = 0; i < header->ncmds; i++)
5254 {
5255 bfd_mach_o_load_command *cur = &cmd[i];
5256
5257 bfd_mach_o_append_command (abfd, cur);
5258
5259 if (i == 0)
5260 cur->offset = hdrsize;
5261 else
5262 {
5263 bfd_mach_o_load_command *prev = &cmd[i - 1];
5264 cur->offset = prev->offset + prev->len;
5265 }
5266
5267 if (!bfd_mach_o_read_command (abfd, cur))
5268 return FALSE;
5269 }
5270 }
5271
5272 /* Sections should be flatten before scanning start address. */
5273 if (!bfd_mach_o_flatten_sections (abfd))
5274 return FALSE;
5275 if (!bfd_mach_o_scan_start_address (abfd))
5276 return FALSE;
5277
5278 return TRUE;
5279 }
5280
5281 bfd_boolean
5282 bfd_mach_o_mkobject_init (bfd *abfd)
5283 {
5284 bfd_mach_o_data_struct *mdata = NULL;
5285
5286 mdata = bfd_zalloc (abfd, sizeof (bfd_mach_o_data_struct));
5287 if (mdata == NULL)
5288 return FALSE;
5289 abfd->tdata.mach_o_data = mdata;
5290
5291 mdata->header.magic = 0;
5292 mdata->header.cputype = 0;
5293 mdata->header.cpusubtype = 0;
5294 mdata->header.filetype = 0;
5295 mdata->header.ncmds = 0;
5296 mdata->header.sizeofcmds = 0;
5297 mdata->header.flags = 0;
5298 mdata->header.byteorder = BFD_ENDIAN_UNKNOWN;
5299 mdata->first_command = NULL;
5300 mdata->last_command = NULL;
5301 mdata->nsects = 0;
5302 mdata->sections = NULL;
5303 mdata->dyn_reloc_cache = NULL;
5304
5305 return TRUE;
5306 }
5307
5308 static bfd_boolean
5309 bfd_mach_o_gen_mkobject (bfd *abfd)
5310 {
5311 bfd_mach_o_data_struct *mdata;
5312
5313 if (!bfd_mach_o_mkobject_init (abfd))
5314 return FALSE;
5315
5316 mdata = bfd_mach_o_get_data (abfd);
5317 mdata->header.magic = BFD_MACH_O_MH_MAGIC;
5318 mdata->header.cputype = 0;
5319 mdata->header.cpusubtype = 0;
5320 mdata->header.byteorder = abfd->xvec->byteorder;
5321 mdata->header.version = 1;
5322
5323 return TRUE;
5324 }
5325
5326 const bfd_target *
5327 bfd_mach_o_header_p (bfd *abfd,
5328 file_ptr hdr_off,
5329 bfd_mach_o_filetype file_type,
5330 bfd_mach_o_cpu_type cpu_type)
5331 {
5332 bfd_mach_o_header header;
5333 bfd_mach_o_data_struct *mdata;
5334
5335 if (!bfd_mach_o_read_header (abfd, hdr_off, &header))
5336 goto wrong;
5337
5338 if (! (header.byteorder == BFD_ENDIAN_BIG
5339 || header.byteorder == BFD_ENDIAN_LITTLE))
5340 {
5341 _bfd_error_handler (_("unknown header byte-order value %#x"),
5342 header.byteorder);
5343 goto wrong;
5344 }
5345
5346 if (! ((header.byteorder == BFD_ENDIAN_BIG
5347 && abfd->xvec->byteorder == BFD_ENDIAN_BIG
5348 && abfd->xvec->header_byteorder == BFD_ENDIAN_BIG)
5349 || (header.byteorder == BFD_ENDIAN_LITTLE
5350 && abfd->xvec->byteorder == BFD_ENDIAN_LITTLE
5351 && abfd->xvec->header_byteorder == BFD_ENDIAN_LITTLE)))
5352 goto wrong;
5353
5354 /* Check cputype and filetype.
5355 In case of wildcard, do not accept magics that are handled by existing
5356 targets. */
5357 if (cpu_type)
5358 {
5359 if (header.cputype != cpu_type)
5360 goto wrong;
5361 }
5362 else
5363 {
5364 #ifndef BFD64
5365 /* Do not recognize 64 architectures if not configured for 64bit targets.
5366 This could happen only for generic targets. */
5367 if (mach_o_wide_p (&header))
5368 goto wrong;
5369 #endif
5370 }
5371
5372 if (file_type)
5373 {
5374 if (header.filetype != file_type)
5375 goto wrong;
5376 }
5377 else
5378 {
5379 switch (header.filetype)
5380 {
5381 case BFD_MACH_O_MH_CORE:
5382 /* Handled by core_p */
5383 goto wrong;
5384 default:
5385 break;
5386 }
5387 }
5388
5389 mdata = (bfd_mach_o_data_struct *) bfd_zalloc (abfd, sizeof (*mdata));
5390 if (mdata == NULL)
5391 goto fail;
5392 mdata->hdr_offset = hdr_off;
5393
5394 if (!bfd_mach_o_scan (abfd, &header, mdata))
5395 goto wrong;
5396
5397 return abfd->xvec;
5398
5399 wrong:
5400 bfd_set_error (bfd_error_wrong_format);
5401
5402 fail:
5403 return NULL;
5404 }
5405
5406 static const bfd_target *
5407 bfd_mach_o_gen_object_p (bfd *abfd)
5408 {
5409 return bfd_mach_o_header_p (abfd, 0, 0, 0);
5410 }
5411
5412 static const bfd_target *
5413 bfd_mach_o_gen_core_p (bfd *abfd)
5414 {
5415 return bfd_mach_o_header_p (abfd, 0, BFD_MACH_O_MH_CORE, 0);
5416 }
5417
5418 /* Return the base address of ABFD, ie the address at which the image is
5419 mapped. The possible initial pagezero is ignored. */
5420
5421 bfd_vma
5422 bfd_mach_o_get_base_address (bfd *abfd)
5423 {
5424 bfd_mach_o_data_struct *mdata;
5425 bfd_mach_o_load_command *cmd;
5426
5427 /* Check for Mach-O. */
5428 if (!bfd_mach_o_valid (abfd))
5429 return 0;
5430 mdata = bfd_mach_o_get_data (abfd);
5431
5432 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5433 {
5434 if ((cmd->type == BFD_MACH_O_LC_SEGMENT
5435 || cmd->type == BFD_MACH_O_LC_SEGMENT_64))
5436 {
5437 struct bfd_mach_o_segment_command *segcmd = &cmd->command.segment;
5438
5439 if (segcmd->initprot != 0)
5440 return segcmd->vmaddr;
5441 }
5442 }
5443 return 0;
5444 }
5445
5446 typedef struct mach_o_fat_archentry
5447 {
5448 unsigned long cputype;
5449 unsigned long cpusubtype;
5450 unsigned long offset;
5451 unsigned long size;
5452 unsigned long align;
5453 } mach_o_fat_archentry;
5454
5455 typedef struct mach_o_fat_data_struct
5456 {
5457 unsigned long magic;
5458 unsigned long nfat_arch;
5459 mach_o_fat_archentry *archentries;
5460 } mach_o_fat_data_struct;
5461
5462 const bfd_target *
5463 bfd_mach_o_fat_archive_p (bfd *abfd)
5464 {
5465 mach_o_fat_data_struct *adata = NULL;
5466 struct mach_o_fat_header_external hdr;
5467 unsigned long i;
5468 size_t amt;
5469
5470 if (bfd_seek (abfd, 0, SEEK_SET) != 0
5471 || bfd_bread (&hdr, sizeof (hdr), abfd) != sizeof (hdr))
5472 goto error;
5473
5474 adata = bfd_alloc (abfd, sizeof (mach_o_fat_data_struct));
5475 if (adata == NULL)
5476 goto error;
5477
5478 adata->magic = bfd_getb32 (hdr.magic);
5479 adata->nfat_arch = bfd_getb32 (hdr.nfat_arch);
5480 if (adata->magic != 0xcafebabe)
5481 goto error;
5482 /* Avoid matching Java bytecode files, which have the same magic number.
5483 In the Java bytecode file format this field contains the JVM version,
5484 which starts at 43.0. */
5485 if (adata->nfat_arch > 30)
5486 goto error;
5487
5488 if (_bfd_mul_overflow (adata->nfat_arch,
5489 sizeof (mach_o_fat_archentry), &amt))
5490 {
5491 bfd_set_error (bfd_error_file_too_big);
5492 goto error;
5493 }
5494 adata->archentries = bfd_alloc (abfd, amt);
5495 if (adata->archentries == NULL)
5496 goto error;
5497
5498 for (i = 0; i < adata->nfat_arch; i++)
5499 {
5500 struct mach_o_fat_arch_external arch;
5501 if (bfd_bread (&arch, sizeof (arch), abfd) != sizeof (arch))
5502 goto error;
5503 adata->archentries[i].cputype = bfd_getb32 (arch.cputype);
5504 adata->archentries[i].cpusubtype = bfd_getb32 (arch.cpusubtype);
5505 adata->archentries[i].offset = bfd_getb32 (arch.offset);
5506 adata->archentries[i].size = bfd_getb32 (arch.size);
5507 adata->archentries[i].align = bfd_getb32 (arch.align);
5508 }
5509
5510 abfd->tdata.mach_o_fat_data = adata;
5511
5512 return abfd->xvec;
5513
5514 error:
5515 if (adata != NULL)
5516 bfd_release (abfd, adata);
5517 bfd_set_error (bfd_error_wrong_format);
5518 return NULL;
5519 }
5520
5521 /* Set the filename for a fat binary member ABFD, whose bfd architecture is
5522 ARCH_TYPE/ARCH_SUBTYPE and corresponding entry in header is ENTRY.
5523 Set arelt_data and origin fields too. */
5524
5525 static bfd_boolean
5526 bfd_mach_o_fat_member_init (bfd *abfd,
5527 enum bfd_architecture arch_type,
5528 unsigned long arch_subtype,
5529 mach_o_fat_archentry *entry)
5530 {
5531 struct areltdata *areltdata;
5532 /* Create the member filename. Use ARCH_NAME. */
5533 const bfd_arch_info_type *ap = bfd_lookup_arch (arch_type, arch_subtype);
5534 char *filename;
5535
5536 if (ap)
5537 {
5538 /* Use the architecture name if known. */
5539 filename = bfd_strdup (ap->printable_name);
5540 if (filename == NULL)
5541 return FALSE;
5542 }
5543 else
5544 {
5545 /* Forge a uniq id. */
5546 const size_t namelen = 2 + 8 + 1 + 2 + 8 + 1;
5547 filename = bfd_malloc (namelen);
5548 if (filename == NULL)
5549 return FALSE;
5550 snprintf (filename, namelen, "0x%lx-0x%lx",
5551 entry->cputype, entry->cpusubtype);
5552 }
5553 bfd_set_filename (abfd, filename);
5554
5555 areltdata = bfd_zmalloc (sizeof (struct areltdata));
5556 if (areltdata == NULL)
5557 return FALSE;
5558 areltdata->parsed_size = entry->size;
5559 abfd->arelt_data = areltdata;
5560 abfd->iostream = NULL;
5561 abfd->origin = entry->offset;
5562 return TRUE;
5563 }
5564
5565 bfd *
5566 bfd_mach_o_fat_openr_next_archived_file (bfd *archive, bfd *prev)
5567 {
5568 mach_o_fat_data_struct *adata;
5569 mach_o_fat_archentry *entry = NULL;
5570 unsigned long i;
5571 bfd *nbfd;
5572 enum bfd_architecture arch_type;
5573 unsigned long arch_subtype;
5574
5575 adata = (mach_o_fat_data_struct *) archive->tdata.mach_o_fat_data;
5576 BFD_ASSERT (adata != NULL);
5577
5578 /* Find index of previous entry. */
5579 if (prev == NULL)
5580 {
5581 /* Start at first one. */
5582 i = 0;
5583 }
5584 else
5585 {
5586 /* Find index of PREV. */
5587 for (i = 0; i < adata->nfat_arch; i++)
5588 {
5589 if (adata->archentries[i].offset == prev->origin)
5590 break;
5591 }
5592
5593 if (i == adata->nfat_arch)
5594 {
5595 /* Not found. */
5596 bfd_set_error (bfd_error_bad_value);
5597 return NULL;
5598 }
5599
5600 /* Get next entry. */
5601 i++;
5602 }
5603
5604 if (i >= adata->nfat_arch)
5605 {
5606 bfd_set_error (bfd_error_no_more_archived_files);
5607 return NULL;
5608 }
5609
5610 entry = &adata->archentries[i];
5611 nbfd = _bfd_new_bfd_contained_in (archive);
5612 if (nbfd == NULL)
5613 return NULL;
5614
5615 bfd_mach_o_convert_architecture (entry->cputype, entry->cpusubtype,
5616 &arch_type, &arch_subtype);
5617
5618 if (!bfd_mach_o_fat_member_init (nbfd, arch_type, arch_subtype, entry))
5619 {
5620 bfd_close (nbfd);
5621 return NULL;
5622 }
5623
5624 bfd_set_arch_mach (nbfd, arch_type, arch_subtype);
5625
5626 return nbfd;
5627 }
5628
5629 /* Analogous to stat call. */
5630
5631 static int
5632 bfd_mach_o_fat_stat_arch_elt (bfd *abfd, struct stat *buf)
5633 {
5634 if (abfd->arelt_data == NULL)
5635 {
5636 bfd_set_error (bfd_error_invalid_operation);
5637 return -1;
5638 }
5639
5640 buf->st_mtime = 0;
5641 buf->st_uid = 0;
5642 buf->st_gid = 0;
5643 buf->st_mode = 0644;
5644 buf->st_size = arelt_size (abfd);
5645
5646 return 0;
5647 }
5648
5649 /* If ABFD format is FORMAT and architecture is ARCH, return it.
5650 If ABFD is a fat image containing a member that corresponds to FORMAT
5651 and ARCH, returns it.
5652 In other case, returns NULL.
5653 This function allows transparent uses of fat images. */
5654
5655 bfd *
5656 bfd_mach_o_fat_extract (bfd *abfd,
5657 bfd_format format,
5658 const bfd_arch_info_type *arch)
5659 {
5660 bfd *res;
5661 mach_o_fat_data_struct *adata;
5662 unsigned int i;
5663
5664 if (bfd_check_format (abfd, format))
5665 {
5666 if (bfd_get_arch_info (abfd) == arch)
5667 return abfd;
5668 return NULL;
5669 }
5670 if (!bfd_check_format (abfd, bfd_archive)
5671 || abfd->xvec != &mach_o_fat_vec)
5672 return NULL;
5673
5674 /* This is a Mach-O fat image. */
5675 adata = (mach_o_fat_data_struct *) abfd->tdata.mach_o_fat_data;
5676 BFD_ASSERT (adata != NULL);
5677
5678 for (i = 0; i < adata->nfat_arch; i++)
5679 {
5680 struct mach_o_fat_archentry *e = &adata->archentries[i];
5681 enum bfd_architecture cpu_type;
5682 unsigned long cpu_subtype;
5683
5684 bfd_mach_o_convert_architecture (e->cputype, e->cpusubtype,
5685 &cpu_type, &cpu_subtype);
5686 if (cpu_type != arch->arch || cpu_subtype != arch->mach)
5687 continue;
5688
5689 /* The architecture is found. */
5690 res = _bfd_new_bfd_contained_in (abfd);
5691 if (res == NULL)
5692 return NULL;
5693
5694 if (bfd_mach_o_fat_member_init (res, cpu_type, cpu_subtype, e)
5695 && bfd_check_format (res, format))
5696 {
5697 BFD_ASSERT (bfd_get_arch_info (res) == arch);
5698 return res;
5699 }
5700 bfd_close (res);
5701 return NULL;
5702 }
5703
5704 return NULL;
5705 }
5706
5707 static bfd_boolean
5708 bfd_mach_o_fat_close_and_cleanup (bfd *abfd)
5709 {
5710 _bfd_unlink_from_archive_parent (abfd);
5711 return TRUE;
5712 }
5713
5714 int
5715 bfd_mach_o_lookup_command (bfd *abfd,
5716 bfd_mach_o_load_command_type type,
5717 bfd_mach_o_load_command **mcommand)
5718 {
5719 struct mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5720 struct bfd_mach_o_load_command *cmd;
5721 unsigned int num;
5722
5723 BFD_ASSERT (mdata != NULL);
5724 BFD_ASSERT (mcommand != NULL);
5725
5726 num = 0;
5727 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5728 {
5729 if (cmd->type != type)
5730 continue;
5731
5732 if (num == 0)
5733 *mcommand = cmd;
5734 num++;
5735 }
5736
5737 return num;
5738 }
5739
5740 unsigned long
5741 bfd_mach_o_stack_addr (enum bfd_mach_o_cpu_type type)
5742 {
5743 switch (type)
5744 {
5745 case BFD_MACH_O_CPU_TYPE_MC680x0:
5746 return 0x04000000;
5747 case BFD_MACH_O_CPU_TYPE_POWERPC:
5748 return 0xc0000000;
5749 case BFD_MACH_O_CPU_TYPE_I386:
5750 return 0xc0000000;
5751 case BFD_MACH_O_CPU_TYPE_SPARC:
5752 return 0xf0000000;
5753 case BFD_MACH_O_CPU_TYPE_HPPA:
5754 return 0xc0000000 - 0x04000000;
5755 default:
5756 return 0;
5757 }
5758 }
5759
5760 /* The following two tables should be kept, as far as possible, in order of
5761 most frequently used entries to optimize their use from gas. */
5762
5763 const bfd_mach_o_xlat_name bfd_mach_o_section_type_name[] =
5764 {
5765 { "regular", BFD_MACH_O_S_REGULAR},
5766 { "coalesced", BFD_MACH_O_S_COALESCED},
5767 { "zerofill", BFD_MACH_O_S_ZEROFILL},
5768 { "cstring_literals", BFD_MACH_O_S_CSTRING_LITERALS},
5769 { "4byte_literals", BFD_MACH_O_S_4BYTE_LITERALS},
5770 { "8byte_literals", BFD_MACH_O_S_8BYTE_LITERALS},
5771 { "16byte_literals", BFD_MACH_O_S_16BYTE_LITERALS},
5772 { "literal_pointers", BFD_MACH_O_S_LITERAL_POINTERS},
5773 { "mod_init_func_pointers", BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS},
5774 { "mod_fini_func_pointers", BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS},
5775 { "gb_zerofill", BFD_MACH_O_S_GB_ZEROFILL},
5776 { "interposing", BFD_MACH_O_S_INTERPOSING},
5777 { "dtrace_dof", BFD_MACH_O_S_DTRACE_DOF},
5778 { "non_lazy_symbol_pointers", BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS},
5779 { "lazy_symbol_pointers", BFD_MACH_O_S_LAZY_SYMBOL_POINTERS},
5780 { "symbol_stubs", BFD_MACH_O_S_SYMBOL_STUBS},
5781 { "lazy_dylib_symbol_pointers", BFD_MACH_O_S_LAZY_DYLIB_SYMBOL_POINTERS},
5782 { NULL, 0}
5783 };
5784
5785 const bfd_mach_o_xlat_name bfd_mach_o_section_attribute_name[] =
5786 {
5787 { "pure_instructions", BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS },
5788 { "some_instructions", BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS },
5789 { "loc_reloc", BFD_MACH_O_S_ATTR_LOC_RELOC },
5790 { "ext_reloc", BFD_MACH_O_S_ATTR_EXT_RELOC },
5791 { "debug", BFD_MACH_O_S_ATTR_DEBUG },
5792 { "live_support", BFD_MACH_O_S_ATTR_LIVE_SUPPORT },
5793 { "no_dead_strip", BFD_MACH_O_S_ATTR_NO_DEAD_STRIP },
5794 { "strip_static_syms", BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS },
5795 { "no_toc", BFD_MACH_O_S_ATTR_NO_TOC },
5796 { "self_modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
5797 { "modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
5798 { NULL, 0}
5799 };
5800
5801 /* Get the section type from NAME. Return 256 if NAME is unknown. */
5802
5803 unsigned int
5804 bfd_mach_o_get_section_type_from_name (bfd *abfd, const char *name)
5805 {
5806 const bfd_mach_o_xlat_name *x;
5807 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
5808
5809 for (x = bfd_mach_o_section_type_name; x->name; x++)
5810 if (strcmp (x->name, name) == 0)
5811 {
5812 /* We found it... does the target support it? */
5813 if (bed->bfd_mach_o_section_type_valid_for_target == NULL
5814 || bed->bfd_mach_o_section_type_valid_for_target (x->val))
5815 return x->val; /* OK. */
5816 else
5817 break; /* Not supported. */
5818 }
5819 /* Maximum section ID = 0xff. */
5820 return 256;
5821 }
5822
5823 /* Get the section attribute from NAME. Return -1 if NAME is unknown. */
5824
5825 unsigned int
5826 bfd_mach_o_get_section_attribute_from_name (const char *name)
5827 {
5828 const bfd_mach_o_xlat_name *x;
5829
5830 for (x = bfd_mach_o_section_attribute_name; x->name; x++)
5831 if (strcmp (x->name, name) == 0)
5832 return x->val;
5833 return (unsigned int)-1;
5834 }
5835
5836 int
5837 bfd_mach_o_core_fetch_environment (bfd *abfd,
5838 unsigned char **rbuf,
5839 unsigned int *rlen)
5840 {
5841 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5842 unsigned long stackaddr = bfd_mach_o_stack_addr (mdata->header.cputype);
5843 bfd_mach_o_load_command *cmd;
5844
5845 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5846 {
5847 bfd_mach_o_segment_command *seg;
5848
5849 if (cmd->type != BFD_MACH_O_LC_SEGMENT)
5850 continue;
5851
5852 seg = &cmd->command.segment;
5853
5854 if ((seg->vmaddr + seg->vmsize) == stackaddr)
5855 {
5856 unsigned long start = seg->fileoff;
5857 unsigned long end = seg->fileoff + seg->filesize;
5858 unsigned char *buf = bfd_malloc (1024);
5859 unsigned long size = 1024;
5860
5861 if (buf == NULL)
5862 return -1;
5863 for (;;)
5864 {
5865 bfd_size_type nread = 0;
5866 unsigned long offset;
5867 int found_nonnull = 0;
5868
5869 if (size > (end - start))
5870 size = (end - start);
5871
5872 buf = bfd_realloc_or_free (buf, size);
5873 if (buf == NULL)
5874 return -1;
5875
5876 if (bfd_seek (abfd, end - size, SEEK_SET) != 0)
5877 {
5878 free (buf);
5879 return -1;
5880 }
5881
5882 nread = bfd_bread (buf, size, abfd);
5883
5884 if (nread != size)
5885 {
5886 free (buf);
5887 return -1;
5888 }
5889
5890 for (offset = 4; offset <= size; offset += 4)
5891 {
5892 unsigned long val;
5893
5894 val = *((unsigned long *) (buf + size - offset));
5895 if (! found_nonnull)
5896 {
5897 if (val != 0)
5898 found_nonnull = 1;
5899 }
5900 else if (val == 0x0)
5901 {
5902 unsigned long bottom;
5903 unsigned long top;
5904
5905 bottom = seg->fileoff + seg->filesize - offset;
5906 top = seg->fileoff + seg->filesize - 4;
5907 *rbuf = bfd_malloc (top - bottom);
5908 if (*rbuf == NULL)
5909 return -1;
5910 *rlen = top - bottom;
5911
5912 memcpy (*rbuf, buf + size - *rlen, *rlen);
5913 free (buf);
5914 return 0;
5915 }
5916 }
5917
5918 if (size == (end - start))
5919 break;
5920
5921 size *= 2;
5922 }
5923
5924 free (buf);
5925 }
5926 }
5927
5928 return -1;
5929 }
5930
5931 char *
5932 bfd_mach_o_core_file_failing_command (bfd *abfd)
5933 {
5934 unsigned char *buf = NULL;
5935 unsigned int len = 0;
5936 int ret;
5937
5938 ret = bfd_mach_o_core_fetch_environment (abfd, &buf, &len);
5939 if (ret < 0)
5940 return NULL;
5941
5942 return (char *) buf;
5943 }
5944
5945 int
5946 bfd_mach_o_core_file_failing_signal (bfd *abfd ATTRIBUTE_UNUSED)
5947 {
5948 return 0;
5949 }
5950
5951 static bfd_mach_o_uuid_command *
5952 bfd_mach_o_lookup_uuid_command (bfd *abfd)
5953 {
5954 bfd_mach_o_load_command *uuid_cmd = NULL;
5955 int ncmd = bfd_mach_o_lookup_command (abfd, BFD_MACH_O_LC_UUID, &uuid_cmd);
5956 if (ncmd != 1 || uuid_cmd == NULL)
5957 return FALSE;
5958 return &uuid_cmd->command.uuid;
5959 }
5960
5961 /* Return true if ABFD is a dSYM file and its UUID matches UUID_CMD. */
5962
5963 static bfd_boolean
5964 bfd_mach_o_dsym_for_uuid_p (bfd *abfd, const bfd_mach_o_uuid_command *uuid_cmd)
5965 {
5966 bfd_mach_o_uuid_command *dsym_uuid_cmd;
5967
5968 BFD_ASSERT (abfd);
5969 BFD_ASSERT (uuid_cmd);
5970
5971 if (!bfd_check_format (abfd, bfd_object))
5972 return FALSE;
5973
5974 if (bfd_get_flavour (abfd) != bfd_target_mach_o_flavour
5975 || bfd_mach_o_get_data (abfd) == NULL
5976 || bfd_mach_o_get_data (abfd)->header.filetype != BFD_MACH_O_MH_DSYM)
5977 return FALSE;
5978
5979 dsym_uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd);
5980 if (dsym_uuid_cmd == NULL)
5981 return FALSE;
5982
5983 if (memcmp (uuid_cmd->uuid, dsym_uuid_cmd->uuid,
5984 sizeof (uuid_cmd->uuid)) != 0)
5985 return FALSE;
5986
5987 return TRUE;
5988 }
5989
5990 /* Find a BFD in DSYM_FILENAME which matches ARCH and UUID_CMD.
5991 The caller is responsible for closing the returned BFD object and
5992 its my_archive if the returned BFD is in a fat dSYM. */
5993
5994 static bfd *
5995 bfd_mach_o_find_dsym (const char *dsym_filename,
5996 const bfd_mach_o_uuid_command *uuid_cmd,
5997 const bfd_arch_info_type *arch)
5998 {
5999 bfd *base_dsym_bfd, *dsym_bfd;
6000
6001 BFD_ASSERT (uuid_cmd);
6002
6003 base_dsym_bfd = bfd_openr (dsym_filename, NULL);
6004 if (base_dsym_bfd == NULL)
6005 return NULL;
6006
6007 dsym_bfd = bfd_mach_o_fat_extract (base_dsym_bfd, bfd_object, arch);
6008 if (bfd_mach_o_dsym_for_uuid_p (dsym_bfd, uuid_cmd))
6009 return dsym_bfd;
6010
6011 bfd_close (dsym_bfd);
6012 if (base_dsym_bfd != dsym_bfd)
6013 bfd_close (base_dsym_bfd);
6014
6015 return NULL;
6016 }
6017
6018 /* Return a BFD created from a dSYM file for ABFD.
6019 The caller is responsible for closing the returned BFD object, its
6020 filename, and its my_archive if the returned BFD is in a fat dSYM. */
6021
6022 static bfd *
6023 bfd_mach_o_follow_dsym (bfd *abfd)
6024 {
6025 char *dsym_filename;
6026 bfd_mach_o_uuid_command *uuid_cmd;
6027 bfd *dsym_bfd, *base_bfd = abfd;
6028 const char *base_basename;
6029
6030 if (abfd == NULL || bfd_get_flavour (abfd) != bfd_target_mach_o_flavour)
6031 return NULL;
6032
6033 if (abfd->my_archive && !bfd_is_thin_archive (abfd->my_archive))
6034 base_bfd = abfd->my_archive;
6035 /* BFD may have been opened from a stream. */
6036 if (base_bfd->filename == NULL)
6037 {
6038 bfd_set_error (bfd_error_invalid_operation);
6039 return NULL;
6040 }
6041 base_basename = lbasename (base_bfd->filename);
6042
6043 uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd);
6044 if (uuid_cmd == NULL)
6045 return NULL;
6046
6047 /* TODO: We assume the DWARF file has the same as the binary's.
6048 It seems apple's GDB checks all files in the dSYM bundle directory.
6049 http://opensource.apple.com/source/gdb/gdb-1708/src/gdb/macosx/macosx-tdep.c
6050 */
6051 dsym_filename = (char *)bfd_malloc (strlen (base_bfd->filename)
6052 + strlen (dsym_subdir) + 1
6053 + strlen (base_basename) + 1);
6054 if (dsym_filename == NULL)
6055 return NULL;
6056
6057 sprintf (dsym_filename, "%s%s/%s",
6058 base_bfd->filename, dsym_subdir, base_basename);
6059
6060 dsym_bfd = bfd_mach_o_find_dsym (dsym_filename, uuid_cmd,
6061 bfd_get_arch_info (abfd));
6062 if (dsym_bfd == NULL)
6063 free (dsym_filename);
6064
6065 return dsym_bfd;
6066 }
6067
6068 bfd_boolean
6069 bfd_mach_o_find_nearest_line (bfd *abfd,
6070 asymbol **symbols,
6071 asection *section,
6072 bfd_vma offset,
6073 const char **filename_ptr,
6074 const char **functionname_ptr,
6075 unsigned int *line_ptr,
6076 unsigned int *discriminator_ptr)
6077 {
6078 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
6079 if (mdata == NULL)
6080 return FALSE;
6081 switch (mdata->header.filetype)
6082 {
6083 case BFD_MACH_O_MH_OBJECT:
6084 break;
6085 case BFD_MACH_O_MH_EXECUTE:
6086 case BFD_MACH_O_MH_DYLIB:
6087 case BFD_MACH_O_MH_BUNDLE:
6088 case BFD_MACH_O_MH_KEXT_BUNDLE:
6089 if (mdata->dwarf2_find_line_info == NULL)
6090 {
6091 mdata->dsym_bfd = bfd_mach_o_follow_dsym (abfd);
6092 /* When we couldn't find dSYM for this binary, we look for
6093 the debug information in the binary itself. In this way,
6094 we won't try finding separated dSYM again because
6095 mdata->dwarf2_find_line_info will be filled. */
6096 if (! mdata->dsym_bfd)
6097 break;
6098 if (! _bfd_dwarf2_slurp_debug_info (abfd, mdata->dsym_bfd,
6099 dwarf_debug_sections, symbols,
6100 &mdata->dwarf2_find_line_info,
6101 FALSE))
6102 return FALSE;
6103 }
6104 break;
6105 default:
6106 return FALSE;
6107 }
6108 return _bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset,
6109 filename_ptr, functionname_ptr,
6110 line_ptr, discriminator_ptr,
6111 dwarf_debug_sections,
6112 &mdata->dwarf2_find_line_info);
6113 }
6114
6115 bfd_boolean
6116 bfd_mach_o_close_and_cleanup (bfd *abfd)
6117 {
6118 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
6119 if (bfd_get_format (abfd) == bfd_object && mdata != NULL)
6120 {
6121 _bfd_dwarf2_cleanup_debug_info (abfd, &mdata->dwarf2_find_line_info);
6122 bfd_mach_o_free_cached_info (abfd);
6123 if (mdata->dsym_bfd != NULL)
6124 {
6125 bfd *fat_bfd = mdata->dsym_bfd->my_archive;
6126 #if 0
6127 /* FIXME: PR 19435: This calculation to find the memory allocated by
6128 bfd_mach_o_follow_dsym for the filename does not always end up
6129 selecting the correct pointer. Unfortunately this problem is
6130 very hard to reproduce on a non Mach-O native system, so until it
6131 can be traced and fixed on such a system, this code will remain
6132 commented out. This does mean that there will be a memory leak,
6133 but it is small, and happens when we are closing down, so it
6134 should not matter too much. */
6135 char *dsym_filename = (char *)(fat_bfd
6136 ? fat_bfd->filename
6137 : mdata->dsym_bfd->filename);
6138 #endif
6139 bfd_close (mdata->dsym_bfd);
6140 mdata->dsym_bfd = NULL;
6141 if (fat_bfd)
6142 bfd_close (fat_bfd);
6143 #if 0
6144 free (dsym_filename);
6145 #endif
6146 }
6147 }
6148
6149 return _bfd_generic_close_and_cleanup (abfd);
6150 }
6151
6152 bfd_boolean
6153 bfd_mach_o_free_cached_info (bfd *abfd)
6154 {
6155 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
6156 asection *asect;
6157 free (mdata->dyn_reloc_cache);
6158 mdata->dyn_reloc_cache = NULL;
6159 for (asect = abfd->sections; asect != NULL; asect = asect->next)
6160 {
6161 free (asect->relocation);
6162 asect->relocation = NULL;
6163 }
6164
6165 return TRUE;
6166 }
6167
6168 #define bfd_mach_o_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
6169 #define bfd_mach_o_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_lookup
6170
6171 #define bfd_mach_o_canonicalize_one_reloc NULL
6172 #define bfd_mach_o_swap_reloc_out NULL
6173 #define bfd_mach_o_print_thread NULL
6174 #define bfd_mach_o_tgt_seg_table NULL
6175 #define bfd_mach_o_section_type_valid_for_tgt NULL
6176
6177 #define TARGET_NAME mach_o_be_vec
6178 #define TARGET_STRING "mach-o-be"
6179 #define TARGET_ARCHITECTURE bfd_arch_unknown
6180 #define TARGET_PAGESIZE 1
6181 #define TARGET_BIG_ENDIAN 1
6182 #define TARGET_ARCHIVE 0
6183 #define TARGET_PRIORITY 1
6184 #include "mach-o-target.c"
6185
6186 #undef TARGET_NAME
6187 #undef TARGET_STRING
6188 #undef TARGET_ARCHITECTURE
6189 #undef TARGET_PAGESIZE
6190 #undef TARGET_BIG_ENDIAN
6191 #undef TARGET_ARCHIVE
6192 #undef TARGET_PRIORITY
6193
6194 #define TARGET_NAME mach_o_le_vec
6195 #define TARGET_STRING "mach-o-le"
6196 #define TARGET_ARCHITECTURE bfd_arch_unknown
6197 #define TARGET_PAGESIZE 1
6198 #define TARGET_BIG_ENDIAN 0
6199 #define TARGET_ARCHIVE 0
6200 #define TARGET_PRIORITY 1
6201
6202 #include "mach-o-target.c"
6203
6204 #undef TARGET_NAME
6205 #undef TARGET_STRING
6206 #undef TARGET_ARCHITECTURE
6207 #undef TARGET_PAGESIZE
6208 #undef TARGET_BIG_ENDIAN
6209 #undef TARGET_ARCHIVE
6210 #undef TARGET_PRIORITY
6211
6212 /* Not yet handled: creating an archive. */
6213 #define bfd_mach_o_mkarchive _bfd_noarchive_mkarchive
6214
6215 #define bfd_mach_o_close_and_cleanup bfd_mach_o_fat_close_and_cleanup
6216
6217 /* Not used. */
6218 #define bfd_mach_o_generic_stat_arch_elt bfd_mach_o_fat_stat_arch_elt
6219 #define bfd_mach_o_openr_next_archived_file bfd_mach_o_fat_openr_next_archived_file
6220 #define bfd_mach_o_archive_p bfd_mach_o_fat_archive_p
6221
6222 #define TARGET_NAME mach_o_fat_vec
6223 #define TARGET_STRING "mach-o-fat"
6224 #define TARGET_ARCHITECTURE bfd_arch_unknown
6225 #define TARGET_PAGESIZE 1
6226 #define TARGET_BIG_ENDIAN 1
6227 #define TARGET_ARCHIVE 1
6228 #define TARGET_PRIORITY 0
6229
6230 #include "mach-o-target.c"
6231
6232 #undef TARGET_NAME
6233 #undef TARGET_STRING
6234 #undef TARGET_ARCHITECTURE
6235 #undef TARGET_PAGESIZE
6236 #undef TARGET_BIG_ENDIAN
6237 #undef TARGET_ARCHIVE
6238 #undef TARGET_PRIORITY
GDB Binutils - Deliverables
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