1 /* Mach-O support for BFD.
2 Copyright (C) 1999-2016 Free Software Foundation, Inc.
3
4 This file is part of BFD, the Binary File Descriptor library.
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
20
21 #include "sysdep.h"
22 #include "mach-o.h"
23 #include "bfd.h"
24 #include "libbfd.h"
25 #include "libiberty.h"
26 #include "aout/stab_gnu.h"
27 #include "mach-o/reloc.h"
28 #include "mach-o/external.h"
29 #include <ctype.h>
30 #include <stdlib.h>
31 #include <string.h>
32
33 #define bfd_mach_o_object_p bfd_mach_o_gen_object_p
34 #define bfd_mach_o_core_p bfd_mach_o_gen_core_p
35 #define bfd_mach_o_mkobject bfd_mach_o_gen_mkobject
36
37 #define FILE_ALIGN(off, algn) \
38 (((off) + ((file_ptr) 1 << (algn)) - 1) & ((file_ptr) -1U << (algn)))
39
40 static bfd_boolean
41 bfd_mach_o_read_dyld_content (bfd *abfd, bfd_mach_o_dyld_info_command *cmd);
42
43 unsigned int
bfd_mach_o_version(bfd * abfd)44 bfd_mach_o_version (bfd *abfd)
45 {
46 bfd_mach_o_data_struct *mdata = NULL;
47
48 BFD_ASSERT (bfd_mach_o_valid (abfd));
49 mdata = bfd_mach_o_get_data (abfd);
50
51 return mdata->header.version;
52 }
53
54 bfd_boolean
bfd_mach_o_valid(bfd * abfd)55 bfd_mach_o_valid (bfd *abfd)
56 {
57 if (abfd == NULL || abfd->xvec == NULL)
58 return FALSE;
59
60 if (abfd->xvec->flavour != bfd_target_mach_o_flavour)
61 return FALSE;
62
63 if (bfd_mach_o_get_data (abfd) == NULL)
64 return FALSE;
65 return TRUE;
66 }
67
68 static INLINE bfd_boolean
mach_o_wide_p(bfd_mach_o_header * header)69 mach_o_wide_p (bfd_mach_o_header *header)
70 {
71 switch (header->version)
72 {
73 case 1:
74 return FALSE;
75 case 2:
76 return TRUE;
77 default:
78 BFD_FAIL ();
79 return FALSE;
80 }
81 }
82
83 static INLINE bfd_boolean
bfd_mach_o_wide_p(bfd * abfd)84 bfd_mach_o_wide_p (bfd *abfd)
85 {
86 return mach_o_wide_p (&bfd_mach_o_get_data (abfd)->header);
87 }
88
89 /* Tables to translate well known Mach-O segment/section names to bfd
90 names. Use of canonical names (such as .text or .debug_frame) is required
91 by gdb. */
92
93 /* __TEXT Segment. */
94 static const mach_o_section_name_xlat text_section_names_xlat[] =
95 {
96 { ".text", "__text",
97 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR,
98 BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS, 0},
99 { ".const", "__const",
100 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
101 BFD_MACH_O_S_ATTR_NONE, 0},
102 { ".static_const", "__static_const",
103 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
104 BFD_MACH_O_S_ATTR_NONE, 0},
105 { ".cstring", "__cstring",
106 SEC_READONLY | SEC_DATA | SEC_LOAD | SEC_MERGE | SEC_STRINGS,
107 BFD_MACH_O_S_CSTRING_LITERALS,
108 BFD_MACH_O_S_ATTR_NONE, 0},
109 { ".literal4", "__literal4",
110 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_4BYTE_LITERALS,
111 BFD_MACH_O_S_ATTR_NONE, 2},
112 { ".literal8", "__literal8",
113 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_8BYTE_LITERALS,
114 BFD_MACH_O_S_ATTR_NONE, 3},
115 { ".literal16", "__literal16",
116 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_16BYTE_LITERALS,
117 BFD_MACH_O_S_ATTR_NONE, 4},
118 { ".constructor", "__constructor",
119 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR,
120 BFD_MACH_O_S_ATTR_NONE, 0},
121 { ".destructor", "__destructor",
122 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR,
123 BFD_MACH_O_S_ATTR_NONE, 0},
124 { ".eh_frame", "__eh_frame",
125 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_COALESCED,
126 BFD_MACH_O_S_ATTR_LIVE_SUPPORT
127 | BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS
128 | BFD_MACH_O_S_ATTR_NO_TOC, 2},
129 { NULL, NULL, 0, 0, 0, 0}
130 };
131
132 /* __DATA Segment. */
133 static const mach_o_section_name_xlat data_section_names_xlat[] =
134 {
135 { ".data", "__data",
136 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
137 BFD_MACH_O_S_ATTR_NONE, 0},
138 { ".bss", "__bss",
139 SEC_NO_FLAGS, BFD_MACH_O_S_ZEROFILL,
140 BFD_MACH_O_S_ATTR_NONE, 0},
141 { ".const_data", "__const",
142 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
143 BFD_MACH_O_S_ATTR_NONE, 0},
144 { ".static_data", "__static_data",
145 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
146 BFD_MACH_O_S_ATTR_NONE, 0},
147 { ".mod_init_func", "__mod_init_func",
148 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS,
149 BFD_MACH_O_S_ATTR_NONE, 2},
150 { ".mod_term_func", "__mod_term_func",
151 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS,
152 BFD_MACH_O_S_ATTR_NONE, 2},
153 { ".dyld", "__dyld",
154 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
155 BFD_MACH_O_S_ATTR_NONE, 0},
156 { ".cfstring", "__cfstring",
157 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
158 BFD_MACH_O_S_ATTR_NONE, 2},
159 { NULL, NULL, 0, 0, 0, 0}
160 };
161
162 /* __DWARF Segment. */
163 static const mach_o_section_name_xlat dwarf_section_names_xlat[] =
164 {
165 { ".debug_frame", "__debug_frame",
166 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
167 BFD_MACH_O_S_ATTR_DEBUG, 0},
168 { ".debug_info", "__debug_info",
169 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
170 BFD_MACH_O_S_ATTR_DEBUG, 0},
171 { ".debug_abbrev", "__debug_abbrev",
172 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
173 BFD_MACH_O_S_ATTR_DEBUG, 0},
174 { ".debug_aranges", "__debug_aranges",
175 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
176 BFD_MACH_O_S_ATTR_DEBUG, 0},
177 { ".debug_macinfo", "__debug_macinfo",
178 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
179 BFD_MACH_O_S_ATTR_DEBUG, 0},
180 { ".debug_line", "__debug_line",
181 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
182 BFD_MACH_O_S_ATTR_DEBUG, 0},
183 { ".debug_loc", "__debug_loc",
184 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
185 BFD_MACH_O_S_ATTR_DEBUG, 0},
186 { ".debug_pubnames", "__debug_pubnames",
187 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
188 BFD_MACH_O_S_ATTR_DEBUG, 0},
189 { ".debug_pubtypes", "__debug_pubtypes",
190 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
191 BFD_MACH_O_S_ATTR_DEBUG, 0},
192 { ".debug_str", "__debug_str",
193 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
194 BFD_MACH_O_S_ATTR_DEBUG, 0},
195 { ".debug_ranges", "__debug_ranges",
196 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
197 BFD_MACH_O_S_ATTR_DEBUG, 0},
198 { ".debug_macro", "__debug_macro",
199 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
200 BFD_MACH_O_S_ATTR_DEBUG, 0},
201 { ".debug_gdb_scripts", "__debug_gdb_scri",
202 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
203 BFD_MACH_O_S_ATTR_DEBUG, 0},
204 { NULL, NULL, 0, 0, 0, 0}
205 };
206
207 /* __OBJC Segment. */
208 static const mach_o_section_name_xlat objc_section_names_xlat[] =
209 {
210 { ".objc_class", "__class",
211 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
212 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
213 { ".objc_meta_class", "__meta_class",
214 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
215 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
216 { ".objc_cat_cls_meth", "__cat_cls_meth",
217 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
218 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
219 { ".objc_cat_inst_meth", "__cat_inst_meth",
220 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
221 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
222 { ".objc_protocol", "__protocol",
223 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
224 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
225 { ".objc_string_object", "__string_object",
226 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
227 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
228 { ".objc_cls_meth", "__cls_meth",
229 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
230 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
231 { ".objc_inst_meth", "__inst_meth",
232 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
233 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
234 { ".objc_cls_refs", "__cls_refs",
235 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LITERAL_POINTERS,
236 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
237 { ".objc_message_refs", "__message_refs",
238 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LITERAL_POINTERS,
239 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
240 { ".objc_symbols", "__symbols",
241 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
242 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
243 { ".objc_category", "__category",
244 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
245 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
246 { ".objc_class_vars", "__class_vars",
247 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
248 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
249 { ".objc_instance_vars", "__instance_vars",
250 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
251 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
252 { ".objc_module_info", "__module_info",
253 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
254 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
255 { ".objc_selector_strs", "__selector_strs",
256 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_CSTRING_LITERALS,
257 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
258 { ".objc_image_info", "__image_info",
259 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
260 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
261 { ".objc_selector_fixup", "__sel_fixup",
262 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
263 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
264 /* Objc V1 */
265 { ".objc1_class_ext", "__class_ext",
266 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
267 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
268 { ".objc1_property_list", "__property",
269 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
270 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
271 { ".objc1_protocol_ext", "__protocol_ext",
272 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
273 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
274 { NULL, NULL, 0, 0, 0, 0}
275 };
276
277 static const mach_o_segment_name_xlat segsec_names_xlat[] =
278 {
279 { "__TEXT", text_section_names_xlat },
280 { "__DATA", data_section_names_xlat },
281 { "__DWARF", dwarf_section_names_xlat },
282 { "__OBJC", objc_section_names_xlat },
283 { NULL, NULL }
284 };
285
286 static const char dsym_subdir[] = ".dSYM/Contents/Resources/DWARF";
287
288 /* For both cases bfd-name => mach-o name and vice versa, the specific target
289 is checked before the generic. This allows a target (e.g. ppc for cstring)
290 to override the generic definition with a more specific one. */
291
292 /* Fetch the translation from a Mach-O section designation (segment, section)
293 as a bfd short name, if one exists. Otherwise return NULL.
294
295 Allow the segment and section names to be unterminated 16 byte arrays. */
296
297 const mach_o_section_name_xlat *
bfd_mach_o_section_data_for_mach_sect(bfd * abfd,const char * segname,const char * sectname)298 bfd_mach_o_section_data_for_mach_sect (bfd *abfd, const char *segname,
299 const char *sectname)
300 {
301 const struct mach_o_segment_name_xlat *seg;
302 const mach_o_section_name_xlat *sec;
303 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
304
305 /* First try any target-specific translations defined... */
306 if (bed->segsec_names_xlat)
307 for (seg = bed->segsec_names_xlat; seg->segname; seg++)
308 if (strncmp (seg->segname, segname, BFD_MACH_O_SEGNAME_SIZE) == 0)
309 for (sec = seg->sections; sec->mach_o_name; sec++)
310 if (strncmp (sec->mach_o_name, sectname,
311 BFD_MACH_O_SECTNAME_SIZE) == 0)
312 return sec;
313
314 /* ... and then the Mach-O generic ones. */
315 for (seg = segsec_names_xlat; seg->segname; seg++)
316 if (strncmp (seg->segname, segname, BFD_MACH_O_SEGNAME_SIZE) == 0)
317 for (sec = seg->sections; sec->mach_o_name; sec++)
318 if (strncmp (sec->mach_o_name, sectname,
319 BFD_MACH_O_SECTNAME_SIZE) == 0)
320 return sec;
321
322 return NULL;
323 }
324
325 /* If the bfd_name for this section is a 'canonical' form for which we
326 know the Mach-O data, return the segment name and the data for the
327 Mach-O equivalent. Otherwise return NULL. */
328
329 const mach_o_section_name_xlat *
bfd_mach_o_section_data_for_bfd_name(bfd * abfd,const char * bfd_name,const char ** segname)330 bfd_mach_o_section_data_for_bfd_name (bfd *abfd, const char *bfd_name,
331 const char **segname)
332 {
333 const struct mach_o_segment_name_xlat *seg;
334 const mach_o_section_name_xlat *sec;
335 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
336 *segname = NULL;
337
338 if (bfd_name[0] != '.')
339 return NULL;
340
341 /* First try any target-specific translations defined... */
342 if (bed->segsec_names_xlat)
343 for (seg = bed->segsec_names_xlat; seg->segname; seg++)
344 for (sec = seg->sections; sec->bfd_name; sec++)
345 if (strcmp (bfd_name, sec->bfd_name) == 0)
346 {
347 *segname = seg->segname;
348 return sec;
349 }
350
351 /* ... and then the Mach-O generic ones. */
352 for (seg = segsec_names_xlat; seg->segname; seg++)
353 for (sec = seg->sections; sec->bfd_name; sec++)
354 if (strcmp (bfd_name, sec->bfd_name) == 0)
355 {
356 *segname = seg->segname;
357 return sec;
358 }
359
360 return NULL;
361 }
362
363 /* Convert Mach-O section name to BFD.
364
365 Try to use standard/canonical names, for which we have tables including
366 default flag settings - which are returned. Otherwise forge a new name
367 in the form "<segmentname>.<sectionname>" this will be prefixed with
368 LC_SEGMENT. if the segment name does not begin with an underscore.
369
370 SEGNAME and SECTNAME are 16 byte arrays (they do not need to be NUL-
371 terminated if the name length is exactly 16 bytes - but must be if the name
372 length is less than 16 characters). */
373
374 void
bfd_mach_o_convert_section_name_to_bfd(bfd * abfd,const char * segname,const char * secname,const char ** name,flagword * flags)375 bfd_mach_o_convert_section_name_to_bfd (bfd *abfd, const char *segname,
376 const char *secname, const char **name,
377 flagword *flags)
378 {
379 const mach_o_section_name_xlat *xlat;
380 char *res;
381 unsigned int len;
382 const char *pfx = "";
383
384 *name = NULL;
385 *flags = SEC_NO_FLAGS;
386
387 /* First search for a canonical name...
388 xlat will be non-null if there is an entry for segname, secname. */
389 xlat = bfd_mach_o_section_data_for_mach_sect (abfd, segname, secname);
390 if (xlat)
391 {
392 len = strlen (xlat->bfd_name);
393 res = bfd_alloc (abfd, len + 1);
394 if (res == NULL)
395 return;
396 memcpy (res, xlat->bfd_name, len+1);
397 *name = res;
398 *flags = xlat->bfd_flags;
399 return;
400 }
401
402 /* ... else we make up a bfd name from the segment concatenated with the
403 section. */
404
405 len = 16 + 1 + 16 + 1;
406
407 /* Put "LC_SEGMENT." prefix if the segment name is weird (ie doesn't start
408 with an underscore. */
409 if (segname[0] != '_')
410 {
411 static const char seg_pfx[] = "LC_SEGMENT.";
412
413 pfx = seg_pfx;
414 len += sizeof (seg_pfx) - 1;
415 }
416
417 res = bfd_alloc (abfd, len);
418 if (res == NULL)
419 return;
420 snprintf (res, len, "%s%.16s.%.16s", pfx, segname, secname);
421 *name = res;
422 }
423
424 /* Convert a bfd section name to a Mach-O segment + section name.
425
426 If the name is a canonical one for which we have a Darwin match
427 return the translation table - which contains defaults for flags,
428 type, attribute and default alignment data.
429
430 Otherwise, expand the bfd_name (assumed to be in the form
431 "[LC_SEGMENT.]<segmentname>.<sectionname>") and return NULL. */
432
433 static const mach_o_section_name_xlat *
bfd_mach_o_convert_section_name_to_mach_o(bfd * abfd ATTRIBUTE_UNUSED,asection * sect,bfd_mach_o_section * section)434 bfd_mach_o_convert_section_name_to_mach_o (bfd *abfd ATTRIBUTE_UNUSED,
435 asection *sect,
436 bfd_mach_o_section *section)
437 {
438 const mach_o_section_name_xlat *xlat;
439 const char *name = bfd_get_section_name (abfd, sect);
440 const char *segname;
441 const char *dot;
442 unsigned int len;
443 unsigned int seglen;
444 unsigned int seclen;
445
446 memset (section->segname, 0, BFD_MACH_O_SEGNAME_SIZE + 1);
447 memset (section->sectname, 0, BFD_MACH_O_SECTNAME_SIZE + 1);
448
449 /* See if is a canonical name ... */
450 xlat = bfd_mach_o_section_data_for_bfd_name (abfd, name, &segname);
451 if (xlat)
452 {
453 strcpy (section->segname, segname);
454 strcpy (section->sectname, xlat->mach_o_name);
455 return xlat;
456 }
457
458 /* .. else we convert our constructed one back to Mach-O.
459 Strip LC_SEGMENT. prefix, if present. */
460 if (strncmp (name, "LC_SEGMENT.", 11) == 0)
461 name += 11;
462
463 /* Find a dot. */
464 dot = strchr (name, '.');
465 len = strlen (name);
466
467 /* Try to split name into segment and section names. */
468 if (dot && dot != name)
469 {
470 seglen = dot - name;
471 seclen = len - (dot + 1 - name);
472
473 if (seglen <= BFD_MACH_O_SEGNAME_SIZE
474 && seclen <= BFD_MACH_O_SECTNAME_SIZE)
475 {
476 memcpy (section->segname, name, seglen);
477 section->segname[seglen] = 0;
478 memcpy (section->sectname, dot + 1, seclen);
479 section->sectname[seclen] = 0;
480 return NULL;
481 }
482 }
483
484 /* The segment and section names are both missing - don't make them
485 into dots. */
486 if (dot && dot == name)
487 return NULL;
488
489 /* Just duplicate the name into both segment and section. */
490 if (len > 16)
491 len = 16;
492 memcpy (section->segname, name, len);
493 section->segname[len] = 0;
494 memcpy (section->sectname, name, len);
495 section->sectname[len] = 0;
496 return NULL;
497 }
498
499 /* Return the size of an entry for section SEC.
500 Must be called only for symbol pointer section and symbol stubs
501 sections. */
502
503 unsigned int
bfd_mach_o_section_get_entry_size(bfd * abfd,bfd_mach_o_section * sec)504 bfd_mach_o_section_get_entry_size (bfd *abfd, bfd_mach_o_section *sec)
505 {
506 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
507 {
508 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
509 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
510 return bfd_mach_o_wide_p (abfd) ? 8 : 4;
511 case BFD_MACH_O_S_SYMBOL_STUBS:
512 return sec->reserved2;
513 default:
514 BFD_FAIL ();
515 return 0;
516 }
517 }
518
519 /* Return the number of indirect symbols for a section.
520 Must be called only for symbol pointer section and symbol stubs
521 sections. */
522
523 unsigned int
bfd_mach_o_section_get_nbr_indirect(bfd * abfd,bfd_mach_o_section * sec)524 bfd_mach_o_section_get_nbr_indirect (bfd *abfd, bfd_mach_o_section *sec)
525 {
526 unsigned int elsz;
527
528 elsz = bfd_mach_o_section_get_entry_size (abfd, sec);
529 if (elsz == 0)
530 return 0;
531 else
532 return sec->size / elsz;
533 }
534
535 /* Append command CMD to ABFD. Note that header.ncmds is not updated. */
536
537 static void
bfd_mach_o_append_command(bfd * abfd,bfd_mach_o_load_command * cmd)538 bfd_mach_o_append_command (bfd *abfd, bfd_mach_o_load_command *cmd)
539 {
540 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
541
542 if (mdata->last_command != NULL)
543 mdata->last_command->next = cmd;
544 else
545 mdata->first_command = cmd;
546 mdata->last_command = cmd;
547 cmd->next = NULL;
548 }
549
550 /* Copy any private info we understand from the input symbol
551 to the output symbol. */
552
553 bfd_boolean
bfd_mach_o_bfd_copy_private_symbol_data(bfd * ibfd ATTRIBUTE_UNUSED,asymbol * isymbol,bfd * obfd ATTRIBUTE_UNUSED,asymbol * osymbol)554 bfd_mach_o_bfd_copy_private_symbol_data (bfd *ibfd ATTRIBUTE_UNUSED,
555 asymbol *isymbol,
556 bfd *obfd ATTRIBUTE_UNUSED,
557 asymbol *osymbol)
558 {
559 bfd_mach_o_asymbol *os, *is;
560
561 os = (bfd_mach_o_asymbol *)osymbol;
562 is = (bfd_mach_o_asymbol *)isymbol;
563 os->n_type = is->n_type;
564 os->n_sect = is->n_sect;
565 os->n_desc = is->n_desc;
566 os->symbol.udata.i = is->symbol.udata.i;
567
568 return TRUE;
569 }
570
571 /* Copy any private info we understand from the input section
572 to the output section. */
573
574 bfd_boolean
bfd_mach_o_bfd_copy_private_section_data(bfd * ibfd,asection * isection,bfd * obfd,asection * osection)575 bfd_mach_o_bfd_copy_private_section_data (bfd *ibfd, asection *isection,
576 bfd *obfd, asection *osection)
577 {
578 bfd_mach_o_section *os = bfd_mach_o_get_mach_o_section (osection);
579 bfd_mach_o_section *is = bfd_mach_o_get_mach_o_section (isection);
580
581 if (ibfd->xvec->flavour != bfd_target_mach_o_flavour
582 || obfd->xvec->flavour != bfd_target_mach_o_flavour)
583 return TRUE;
584
585 BFD_ASSERT (is != NULL && os != NULL);
586
587 os->flags = is->flags;
588 os->reserved1 = is->reserved1;
589 os->reserved2 = is->reserved2;
590 os->reserved3 = is->reserved3;
591
592 return TRUE;
593 }
594
595 /* Copy any private info we understand from the input bfd
596 to the output bfd. */
597
598 bfd_boolean
bfd_mach_o_bfd_copy_private_header_data(bfd * ibfd,bfd * obfd)599 bfd_mach_o_bfd_copy_private_header_data (bfd *ibfd, bfd *obfd)
600 {
601 bfd_mach_o_data_struct *imdata;
602 bfd_mach_o_data_struct *omdata;
603 bfd_mach_o_load_command *icmd;
604
605 if (bfd_get_flavour (ibfd) != bfd_target_mach_o_flavour
606 || bfd_get_flavour (obfd) != bfd_target_mach_o_flavour)
607 return TRUE;
608
609 BFD_ASSERT (bfd_mach_o_valid (ibfd));
610 BFD_ASSERT (bfd_mach_o_valid (obfd));
611
612 imdata = bfd_mach_o_get_data (ibfd);
613 omdata = bfd_mach_o_get_data (obfd);
614
615 /* Copy header flags. */
616 omdata->header.flags = imdata->header.flags;
617
618 /* Copy commands. */
619 for (icmd = imdata->first_command; icmd != NULL; icmd = icmd->next)
620 {
621 bfd_mach_o_load_command *ocmd;
622
623 switch (icmd->type)
624 {
625 case BFD_MACH_O_LC_LOAD_DYLIB:
626 case BFD_MACH_O_LC_LOAD_DYLINKER:
627 case BFD_MACH_O_LC_DYLD_INFO:
628 /* Command is copied. */
629 ocmd = bfd_alloc (obfd, sizeof (bfd_mach_o_load_command));
630 if (ocmd == NULL)
631 return FALSE;
632
633 /* Copy common fields. */
634 ocmd->type = icmd->type;
635 ocmd->type_required = icmd->type_required;
636 ocmd->offset = 0;
637 ocmd->len = icmd->len;
638 break;
639
640 default:
641 /* Command is not copied. */
642 continue;
643 break;
644 }
645
646 switch (icmd->type)
647 {
648 case BFD_MACH_O_LC_LOAD_DYLIB:
649 {
650 bfd_mach_o_dylib_command *idy = &icmd->command.dylib;
651 bfd_mach_o_dylib_command *ody = &ocmd->command.dylib;
652
653 ody->name_offset = idy->name_offset;
654 ody->timestamp = idy->timestamp;
655 ody->current_version = idy->current_version;
656 ody->compatibility_version = idy->compatibility_version;
657 ody->name_str = idy->name_str;
658 }
659 break;
660
661 case BFD_MACH_O_LC_LOAD_DYLINKER:
662 {
663 bfd_mach_o_dylinker_command *idy = &icmd->command.dylinker;
664 bfd_mach_o_dylinker_command *ody = &ocmd->command.dylinker;
665
666 ody->name_offset = idy->name_offset;
667 ody->name_str = idy->name_str;
668 }
669 break;
670
671 case BFD_MACH_O_LC_DYLD_INFO:
672 {
673 bfd_mach_o_dyld_info_command *idy = &icmd->command.dyld_info;
674 bfd_mach_o_dyld_info_command *ody = &ocmd->command.dyld_info;
675
676 if (bfd_mach_o_read_dyld_content (ibfd, idy))
677 {
678 ody->rebase_size = idy->rebase_size;
679 ody->rebase_content = idy->rebase_content;
680
681 ody->bind_size = idy->bind_size;
682 ody->bind_content = idy->bind_content;
683
684 ody->weak_bind_size = idy->weak_bind_size;
685 ody->weak_bind_content = idy->weak_bind_content;
686
687 ody->lazy_bind_size = idy->lazy_bind_size;
688 ody->lazy_bind_content = idy->lazy_bind_content;
689
690 ody->export_size = idy->export_size;
691 ody->export_content = idy->export_content;
692 }
693 /* PR 17512L: file: 730e492d. */
694 else
695 {
696 ody->rebase_size =
697 ody->bind_size =
698 ody->weak_bind_size =
699 ody->lazy_bind_size =
700 ody->export_size = 0;
701 ody->rebase_content =
702 ody->bind_content =
703 ody->weak_bind_content =
704 ody->lazy_bind_content =
705 ody->export_content = NULL;
706 }
707 }
708 break;
709
710 default:
711 /* That command should be handled. */
712 abort ();
713 }
714
715 /* Insert command. */
716 bfd_mach_o_append_command (obfd, ocmd);
717 }
718
719 return TRUE;
720 }
721
722 /* This allows us to set up to 32 bits of flags (unless we invent some
723 fiendish scheme to subdivide). For now, we'll just set the file flags
724 without error checking - just overwrite. */
725
726 bfd_boolean
bfd_mach_o_bfd_set_private_flags(bfd * abfd,flagword flags)727 bfd_mach_o_bfd_set_private_flags (bfd *abfd, flagword flags)
728 {
729 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
730
731 if (!mdata)
732 return FALSE;
733
734 mdata->header.flags = flags;
735 return TRUE;
736 }
737
738 /* Count the total number of symbols. */
739
740 static long
bfd_mach_o_count_symbols(bfd * abfd)741 bfd_mach_o_count_symbols (bfd *abfd)
742 {
743 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
744
745 if (mdata->symtab == NULL)
746 return 0;
747 return mdata->symtab->nsyms;
748 }
749
750 long
bfd_mach_o_get_symtab_upper_bound(bfd * abfd)751 bfd_mach_o_get_symtab_upper_bound (bfd *abfd)
752 {
753 long nsyms = bfd_mach_o_count_symbols (abfd);
754
755 return ((nsyms + 1) * sizeof (asymbol *));
756 }
757
758 long
bfd_mach_o_canonicalize_symtab(bfd * abfd,asymbol ** alocation)759 bfd_mach_o_canonicalize_symtab (bfd *abfd, asymbol **alocation)
760 {
761 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
762 long nsyms = bfd_mach_o_count_symbols (abfd);
763 bfd_mach_o_symtab_command *sym = mdata->symtab;
764 unsigned long j;
765
766 if (nsyms < 0)
767 return nsyms;
768
769 if (nsyms == 0)
770 {
771 /* Do not try to read symbols if there are none. */
772 alocation[0] = NULL;
773 return 0;
774 }
775
776 if (!bfd_mach_o_read_symtab_symbols (abfd))
777 {
778 (*_bfd_error_handler)
779 (_("bfd_mach_o_canonicalize_symtab: unable to load symbols"));
780 return 0;
781 }
782
783 BFD_ASSERT (sym->symbols != NULL);
784
785 for (j = 0; j < sym->nsyms; j++)
786 alocation[j] = &sym->symbols[j].symbol;
787
788 alocation[j] = NULL;
789
790 return nsyms;
791 }
792
793 /* Create synthetic symbols for indirect symbols. */
794
795 long
bfd_mach_o_get_synthetic_symtab(bfd * abfd,long symcount ATTRIBUTE_UNUSED,asymbol ** syms ATTRIBUTE_UNUSED,long dynsymcount ATTRIBUTE_UNUSED,asymbol ** dynsyms ATTRIBUTE_UNUSED,asymbol ** ret)796 bfd_mach_o_get_synthetic_symtab (bfd *abfd,
797 long symcount ATTRIBUTE_UNUSED,
798 asymbol **syms ATTRIBUTE_UNUSED,
799 long dynsymcount ATTRIBUTE_UNUSED,
800 asymbol **dynsyms ATTRIBUTE_UNUSED,
801 asymbol **ret)
802 {
803 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
804 bfd_mach_o_dysymtab_command *dysymtab = mdata->dysymtab;
805 bfd_mach_o_symtab_command *symtab = mdata->symtab;
806 asymbol *s;
807 char * s_start;
808 char * s_end;
809 unsigned long count, i, j, n;
810 size_t size;
811 char *names;
812 char *nul_name;
813 const char stub [] = "$stub";
814
815 *ret = NULL;
816
817 /* Stop now if no symbols or no indirect symbols. */
818 if (dysymtab == NULL || dysymtab->nindirectsyms == 0
819 || symtab == NULL || symtab->symbols == NULL)
820 return 0;
821
822 /* We need to allocate a bfd symbol for every indirect symbol and to
823 allocate the memory for its name. */
824 count = dysymtab->nindirectsyms;
825 size = count * sizeof (asymbol) + 1;
826
827 for (j = 0; j < count; j++)
828 {
829 const char * strng;
830 unsigned int isym = dysymtab->indirect_syms[j];
831
832 /* Some indirect symbols are anonymous. */
833 if (isym < symtab->nsyms && (strng = symtab->symbols[isym].symbol.name))
834 /* PR 17512: file: f5b8eeba. */
835 size += strnlen (strng, symtab->strsize - (strng - symtab->strtab)) + sizeof (stub);
836 }
837
838 s_start = bfd_malloc (size);
839 s = *ret = (asymbol *) s_start;
840 if (s == NULL)
841 return -1;
842 names = (char *) (s + count);
843 nul_name = names;
844 *names++ = 0;
845 s_end = s_start + size;
846
847 n = 0;
848 for (i = 0; i < mdata->nsects; i++)
849 {
850 bfd_mach_o_section *sec = mdata->sections[i];
851 unsigned int first, last;
852 bfd_vma addr;
853 bfd_vma entry_size;
854
855 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
856 {
857 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
858 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
859 case BFD_MACH_O_S_SYMBOL_STUBS:
860 /* Only these sections have indirect symbols. */
861 first = sec->reserved1;
862 last = first + bfd_mach_o_section_get_nbr_indirect (abfd, sec);
863 addr = sec->addr;
864 entry_size = bfd_mach_o_section_get_entry_size (abfd, sec);
865
866 /* PR 17512: file: 08e15eec. */
867 if (first >= count || last >= count || first > last)
868 goto fail;
869
870 for (j = first; j < last; j++)
871 {
872 unsigned int isym = dysymtab->indirect_syms[j];
873
874 /* PR 17512: file: 04d64d9b. */
875 if (((char *) s) + sizeof (* s) > s_end)
876 goto fail;
877
878 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
879 s->section = sec->bfdsection;
880 s->value = addr - sec->addr;
881 s->udata.p = NULL;
882
883 if (isym < symtab->nsyms
884 && symtab->symbols[isym].symbol.name)
885 {
886 const char *sym = symtab->symbols[isym].symbol.name;
887 size_t len;
888
889 s->name = names;
890 len = strlen (sym);
891 /* PR 17512: file: 47dfd4d2. */
892 if (names + len >= s_end)
893 goto fail;
894 memcpy (names, sym, len);
895 names += len;
896 /* PR 17512: file: 18f340a4. */
897 if (names + sizeof (stub) >= s_end)
898 goto fail;
899 memcpy (names, stub, sizeof (stub));
900 names += sizeof (stub);
901 }
902 else
903 s->name = nul_name;
904
905 addr += entry_size;
906 s++;
907 n++;
908 }
909 break;
910 default:
911 break;
912 }
913 }
914
915 return n;
916
917 fail:
918 free (s_start);
919 * ret = NULL;
920 return -1;
921 }
922
923 void
bfd_mach_o_get_symbol_info(bfd * abfd ATTRIBUTE_UNUSED,asymbol * symbol,symbol_info * ret)924 bfd_mach_o_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
925 asymbol *symbol,
926 symbol_info *ret)
927 {
928 bfd_symbol_info (symbol, ret);
929 }
930
931 void
bfd_mach_o_print_symbol(bfd * abfd,void * afile,asymbol * symbol,bfd_print_symbol_type how)932 bfd_mach_o_print_symbol (bfd *abfd,
933 void * afile,
934 asymbol *symbol,
935 bfd_print_symbol_type how)
936 {
937 FILE *file = (FILE *) afile;
938 const char *name;
939 bfd_mach_o_asymbol *asym = (bfd_mach_o_asymbol *)symbol;
940
941 switch (how)
942 {
943 case bfd_print_symbol_name:
944 fprintf (file, "%s", symbol->name);
945 break;
946 default:
947 bfd_print_symbol_vandf (abfd, (void *) file, symbol);
948 if (asym->n_type & BFD_MACH_O_N_STAB)
949 name = bfd_get_stab_name (asym->n_type);
950 else
951 switch (asym->n_type & BFD_MACH_O_N_TYPE)
952 {
953 case BFD_MACH_O_N_UNDF:
954 if (symbol->value == 0)
955 name = "UND";
956 else
957 name = "COM";
958 break;
959 case BFD_MACH_O_N_ABS:
960 name = "ABS";
961 break;
962 case BFD_MACH_O_N_INDR:
963 name = "INDR";
964 break;
965 case BFD_MACH_O_N_PBUD:
966 name = "PBUD";
967 break;
968 case BFD_MACH_O_N_SECT:
969 name = "SECT";
970 break;
971 default:
972 name = "???";
973 break;
974 }
975 if (name == NULL)
976 name = "";
977 fprintf (file, " %02x %-6s %02x %04x",
978 asym->n_type, name, asym->n_sect, asym->n_desc);
979 if ((asym->n_type & BFD_MACH_O_N_STAB) == 0
980 && (asym->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_SECT)
981 fprintf (file, " [%s]", symbol->section->name);
982 fprintf (file, " %s", symbol->name);
983 }
984 }
985
986 static void
bfd_mach_o_convert_architecture(bfd_mach_o_cpu_type mtype,bfd_mach_o_cpu_subtype msubtype,enum bfd_architecture * type,unsigned long * subtype)987 bfd_mach_o_convert_architecture (bfd_mach_o_cpu_type mtype,
988 bfd_mach_o_cpu_subtype msubtype,
989 enum bfd_architecture *type,
990 unsigned long *subtype)
991 {
992 *subtype = bfd_arch_unknown;
993
994 switch (mtype)
995 {
996 case BFD_MACH_O_CPU_TYPE_VAX:
997 *type = bfd_arch_vax;
998 break;
999 case BFD_MACH_O_CPU_TYPE_MC680x0:
1000 *type = bfd_arch_m68k;
1001 break;
1002 case BFD_MACH_O_CPU_TYPE_I386:
1003 *type = bfd_arch_i386;
1004 *subtype = bfd_mach_i386_i386;
1005 break;
1006 case BFD_MACH_O_CPU_TYPE_X86_64:
1007 *type = bfd_arch_i386;
1008 *subtype = bfd_mach_x86_64;
1009 break;
1010 case BFD_MACH_O_CPU_TYPE_MIPS:
1011 *type = bfd_arch_mips;
1012 break;
1013 case BFD_MACH_O_CPU_TYPE_MC98000:
1014 *type = bfd_arch_m98k;
1015 break;
1016 case BFD_MACH_O_CPU_TYPE_HPPA:
1017 *type = bfd_arch_hppa;
1018 break;
1019 case BFD_MACH_O_CPU_TYPE_ARM:
1020 *type = bfd_arch_arm;
1021 switch (msubtype)
1022 {
1023 case BFD_MACH_O_CPU_SUBTYPE_ARM_V4T:
1024 *subtype = bfd_mach_arm_4T;
1025 break;
1026 case BFD_MACH_O_CPU_SUBTYPE_ARM_V6:
1027 *subtype = bfd_mach_arm_4T; /* Best fit ? */
1028 break;
1029 case BFD_MACH_O_CPU_SUBTYPE_ARM_V5TEJ:
1030 *subtype = bfd_mach_arm_5TE;
1031 break;
1032 case BFD_MACH_O_CPU_SUBTYPE_ARM_XSCALE:
1033 *subtype = bfd_mach_arm_XScale;
1034 break;
1035 case BFD_MACH_O_CPU_SUBTYPE_ARM_V7:
1036 *subtype = bfd_mach_arm_5TE; /* Best fit ? */
1037 break;
1038 case BFD_MACH_O_CPU_SUBTYPE_ARM_ALL:
1039 default:
1040 break;
1041 }
1042 break;
1043 case BFD_MACH_O_CPU_TYPE_MC88000:
1044 *type = bfd_arch_m88k;
1045 break;
1046 case BFD_MACH_O_CPU_TYPE_SPARC:
1047 *type = bfd_arch_sparc;
1048 *subtype = bfd_mach_sparc;
1049 break;
1050 case BFD_MACH_O_CPU_TYPE_I860:
1051 *type = bfd_arch_i860;
1052 break;
1053 case BFD_MACH_O_CPU_TYPE_ALPHA:
1054 *type = bfd_arch_alpha;
1055 break;
1056 case BFD_MACH_O_CPU_TYPE_POWERPC:
1057 *type = bfd_arch_powerpc;
1058 *subtype = bfd_mach_ppc;
1059 break;
1060 case BFD_MACH_O_CPU_TYPE_POWERPC_64:
1061 *type = bfd_arch_powerpc;
1062 *subtype = bfd_mach_ppc64;
1063 break;
1064 case BFD_MACH_O_CPU_TYPE_ARM64:
1065 *type = bfd_arch_aarch64;
1066 *subtype = bfd_mach_aarch64;
1067 break;
1068 default:
1069 *type = bfd_arch_unknown;
1070 break;
1071 }
1072 }
1073
1074 /* Write n NUL bytes to ABFD so that LEN + n is a multiple of 4. Return the
1075 number of bytes written or -1 in case of error. */
1076
1077 static int
bfd_mach_o_pad4(bfd * abfd,unsigned int len)1078 bfd_mach_o_pad4 (bfd *abfd, unsigned int len)
1079 {
1080 if (len % 4 != 0)
1081 {
1082 char pad[4] = {0,0,0,0};
1083 unsigned int padlen = 4 - (len % 4);
1084
1085 if (bfd_bwrite (pad, padlen, abfd) != padlen)
1086 return -1;
1087
1088 return padlen;
1089 }
1090 else
1091 return 0;
1092 }
1093
1094 /* Likewise, but for a command. */
1095
1096 static int
bfd_mach_o_pad_command(bfd * abfd,unsigned int len)1097 bfd_mach_o_pad_command (bfd *abfd, unsigned int len)
1098 {
1099 unsigned int align = bfd_mach_o_wide_p (abfd) ? 8 : 4;
1100
1101 if (len % align != 0)
1102 {
1103 char pad[8] = {0};
1104 unsigned int padlen = align - (len % align);
1105
1106 if (bfd_bwrite (pad, padlen, abfd) != padlen)
1107 return -1;
1108
1109 return padlen;
1110 }
1111 else
1112 return 0;
1113 }
1114
1115 static bfd_boolean
bfd_mach_o_write_header(bfd * abfd,bfd_mach_o_header * header)1116 bfd_mach_o_write_header (bfd *abfd, bfd_mach_o_header *header)
1117 {
1118 struct mach_o_header_external raw;
1119 unsigned int size;
1120
1121 size = mach_o_wide_p (header) ?
1122 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
1123
1124 bfd_h_put_32 (abfd, header->magic, raw.magic);
1125 bfd_h_put_32 (abfd, header->cputype, raw.cputype);
1126 bfd_h_put_32 (abfd, header->cpusubtype, raw.cpusubtype);
1127 bfd_h_put_32 (abfd, header->filetype, raw.filetype);
1128 bfd_h_put_32 (abfd, header->ncmds, raw.ncmds);
1129 bfd_h_put_32 (abfd, header->sizeofcmds, raw.sizeofcmds);
1130 bfd_h_put_32 (abfd, header->flags, raw.flags);
1131
1132 if (mach_o_wide_p (header))
1133 bfd_h_put_32 (abfd, header->reserved, raw.reserved);
1134
1135 if (bfd_seek (abfd, 0, SEEK_SET) != 0
1136 || bfd_bwrite (&raw, size, abfd) != size)
1137 return FALSE;
1138
1139 return TRUE;
1140 }
1141
1142 static bfd_boolean
bfd_mach_o_write_thread(bfd * abfd,bfd_mach_o_load_command * command)1143 bfd_mach_o_write_thread (bfd *abfd, bfd_mach_o_load_command *command)
1144 {
1145 bfd_mach_o_thread_command *cmd = &command->command.thread;
1146 unsigned int i;
1147 struct mach_o_thread_command_external raw;
1148 unsigned int offset;
1149
1150 BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD)
1151 || (command->type == BFD_MACH_O_LC_UNIXTHREAD));
1152
1153 offset = BFD_MACH_O_LC_SIZE;
1154 for (i = 0; i < cmd->nflavours; i++)
1155 {
1156 BFD_ASSERT ((cmd->flavours[i].size % 4) == 0);
1157 BFD_ASSERT (cmd->flavours[i].offset ==
1158 (command->offset + offset + BFD_MACH_O_LC_SIZE));
1159
1160 bfd_h_put_32 (abfd, cmd->flavours[i].flavour, raw.flavour);
1161 bfd_h_put_32 (abfd, (cmd->flavours[i].size / 4), raw.count);
1162
1163 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
1164 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1165 return FALSE;
1166
1167 offset += cmd->flavours[i].size + sizeof (raw);
1168 }
1169
1170 return TRUE;
1171 }
1172
1173 static bfd_boolean
bfd_mach_o_write_dylinker(bfd * abfd,bfd_mach_o_load_command * command)1174 bfd_mach_o_write_dylinker (bfd *abfd, bfd_mach_o_load_command *command)
1175 {
1176 bfd_mach_o_dylinker_command *cmd = &command->command.dylinker;
1177 struct mach_o_str_command_external raw;
1178 unsigned int namelen;
1179
1180 bfd_h_put_32 (abfd, cmd->name_offset, raw.str);
1181
1182 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1183 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1184 return FALSE;
1185
1186 namelen = strlen (cmd->name_str) + 1;
1187 if (bfd_bwrite (cmd->name_str, namelen, abfd) != namelen)
1188 return FALSE;
1189
1190 if (bfd_mach_o_pad_command (abfd, namelen) < 0)
1191 return FALSE;
1192
1193 return TRUE;
1194 }
1195
1196 static bfd_boolean
bfd_mach_o_write_dylib(bfd * abfd,bfd_mach_o_load_command * command)1197 bfd_mach_o_write_dylib (bfd *abfd, bfd_mach_o_load_command *command)
1198 {
1199 bfd_mach_o_dylib_command *cmd = &command->command.dylib;
1200 struct mach_o_dylib_command_external raw;
1201 unsigned int namelen;
1202
1203 bfd_h_put_32 (abfd, cmd->name_offset, raw.name);
1204 bfd_h_put_32 (abfd, cmd->timestamp, raw.timestamp);
1205 bfd_h_put_32 (abfd, cmd->current_version, raw.current_version);
1206 bfd_h_put_32 (abfd, cmd->compatibility_version, raw.compatibility_version);
1207
1208 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1209 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1210 return FALSE;
1211
1212 namelen = strlen (cmd->name_str) + 1;
1213 if (bfd_bwrite (cmd->name_str, namelen, abfd) != namelen)
1214 return FALSE;
1215
1216 if (bfd_mach_o_pad_command (abfd, namelen) < 0)
1217 return FALSE;
1218
1219 return TRUE;
1220 }
1221
1222 static bfd_boolean
bfd_mach_o_write_main(bfd * abfd,bfd_mach_o_load_command * command)1223 bfd_mach_o_write_main (bfd *abfd, bfd_mach_o_load_command *command)
1224 {
1225 bfd_mach_o_main_command *cmd = &command->command.main;
1226 struct mach_o_entry_point_command_external raw;
1227
1228 bfd_h_put_64 (abfd, cmd->entryoff, raw.entryoff);
1229 bfd_h_put_64 (abfd, cmd->stacksize, raw.stacksize);
1230
1231 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1232 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1233 return FALSE;
1234
1235 return TRUE;
1236 }
1237
1238 static bfd_boolean
bfd_mach_o_write_dyld_info(bfd * abfd,bfd_mach_o_load_command * command)1239 bfd_mach_o_write_dyld_info (bfd *abfd, bfd_mach_o_load_command *command)
1240 {
1241 bfd_mach_o_dyld_info_command *cmd = &command->command.dyld_info;
1242 struct mach_o_dyld_info_command_external raw;
1243
1244 bfd_h_put_32 (abfd, cmd->rebase_off, raw.rebase_off);
1245 bfd_h_put_32 (abfd, cmd->rebase_size, raw.rebase_size);
1246 bfd_h_put_32 (abfd, cmd->bind_off, raw.bind_off);
1247 bfd_h_put_32 (abfd, cmd->bind_size, raw.bind_size);
1248 bfd_h_put_32 (abfd, cmd->weak_bind_off, raw.weak_bind_off);
1249 bfd_h_put_32 (abfd, cmd->weak_bind_size, raw.weak_bind_size);
1250 bfd_h_put_32 (abfd, cmd->lazy_bind_off, raw.lazy_bind_off);
1251 bfd_h_put_32 (abfd, cmd->lazy_bind_size, raw.lazy_bind_size);
1252 bfd_h_put_32 (abfd, cmd->export_off, raw.export_off);
1253 bfd_h_put_32 (abfd, cmd->export_size, raw.export_size);
1254
1255 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1256 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1257 return FALSE;
1258
1259 if (cmd->rebase_size != 0)
1260 if (bfd_seek (abfd, cmd->rebase_off, SEEK_SET) != 0
1261 || (bfd_bwrite (cmd->rebase_content, cmd->rebase_size, abfd) !=
1262 cmd->rebase_size))
1263 return FALSE;
1264
1265 if (cmd->bind_size != 0)
1266 if (bfd_seek (abfd, cmd->bind_off, SEEK_SET) != 0
1267 || (bfd_bwrite (cmd->bind_content, cmd->bind_size, abfd) !=
1268 cmd->bind_size))
1269 return FALSE;
1270
1271 if (cmd->weak_bind_size != 0)
1272 if (bfd_seek (abfd, cmd->weak_bind_off, SEEK_SET) != 0
1273 || (bfd_bwrite (cmd->weak_bind_content, cmd->weak_bind_size, abfd) !=
1274 cmd->weak_bind_size))
1275 return FALSE;
1276
1277 if (cmd->lazy_bind_size != 0)
1278 if (bfd_seek (abfd, cmd->lazy_bind_off, SEEK_SET) != 0
1279 || (bfd_bwrite (cmd->lazy_bind_content, cmd->lazy_bind_size, abfd) !=
1280 cmd->lazy_bind_size))
1281 return FALSE;
1282
1283 if (cmd->export_size != 0)
1284 if (bfd_seek (abfd, cmd->export_off, SEEK_SET) != 0
1285 || (bfd_bwrite (cmd->export_content, cmd->export_size, abfd) !=
1286 cmd->export_size))
1287 return FALSE;
1288
1289 return TRUE;
1290 }
1291
1292 long
bfd_mach_o_get_reloc_upper_bound(bfd * abfd ATTRIBUTE_UNUSED,asection * asect)1293 bfd_mach_o_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
1294 asection *asect)
1295 {
1296 return (asect->reloc_count + 1) * sizeof (arelent *);
1297 }
1298
1299 /* In addition to the need to byte-swap the symbol number, the bit positions
1300 of the fields in the relocation information vary per target endian-ness. */
1301
1302 void
bfd_mach_o_swap_in_non_scattered_reloc(bfd * abfd,bfd_mach_o_reloc_info * rel,unsigned char * fields)1303 bfd_mach_o_swap_in_non_scattered_reloc (bfd *abfd, bfd_mach_o_reloc_info *rel,
1304 unsigned char *fields)
1305 {
1306 unsigned char info = fields[3];
1307
1308 if (bfd_big_endian (abfd))
1309 {
1310 rel->r_value = (fields[0] << 16) | (fields[1] << 8) | fields[2];
1311 rel->r_type = (info >> BFD_MACH_O_BE_TYPE_SHIFT) & BFD_MACH_O_TYPE_MASK;
1312 rel->r_pcrel = (info & BFD_MACH_O_BE_PCREL) ? 1 : 0;
1313 rel->r_length = (info >> BFD_MACH_O_BE_LENGTH_SHIFT)
1314 & BFD_MACH_O_LENGTH_MASK;
1315 rel->r_extern = (info & BFD_MACH_O_BE_EXTERN) ? 1 : 0;
1316 }
1317 else
1318 {
1319 rel->r_value = (fields[2] << 16) | (fields[1] << 8) | fields[0];
1320 rel->r_type = (info >> BFD_MACH_O_LE_TYPE_SHIFT) & BFD_MACH_O_TYPE_MASK;
1321 rel->r_pcrel = (info & BFD_MACH_O_LE_PCREL) ? 1 : 0;
1322 rel->r_length = (info >> BFD_MACH_O_LE_LENGTH_SHIFT)
1323 & BFD_MACH_O_LENGTH_MASK;
1324 rel->r_extern = (info & BFD_MACH_O_LE_EXTERN) ? 1 : 0;
1325 }
1326 }
1327
1328 /* Set syms_ptr_ptr and addend of RES. */
1329
1330 bfd_boolean
bfd_mach_o_canonicalize_non_scattered_reloc(bfd * abfd,bfd_mach_o_reloc_info * reloc,arelent * res,asymbol ** syms)1331 bfd_mach_o_canonicalize_non_scattered_reloc (bfd *abfd,
1332 bfd_mach_o_reloc_info *reloc,
1333 arelent *res, asymbol **syms)
1334 {
1335 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1336 unsigned int num;
1337 asymbol **sym;
1338
1339 /* Non-scattered relocation. */
1340 reloc->r_scattered = 0;
1341 res->addend = 0;
1342
1343 num = reloc->r_value;
1344
1345 if (reloc->r_extern)
1346 {
1347 /* PR 17512: file: 8396-1185-0.004. */
1348 if (num >= (unsigned) bfd_mach_o_count_symbols (abfd))
1349 sym = bfd_und_section_ptr->symbol_ptr_ptr;
1350 else if (syms == NULL)
1351 sym = bfd_und_section_ptr->symbol_ptr_ptr;
1352 else
1353 /* An external symbol number. */
1354 sym = syms + num;
1355 }
1356 else if (num == 0x00ffffff || num == 0)
1357 {
1358 /* The 'symnum' in a non-scattered PAIR is 0x00ffffff. But as this
1359 is generic code, we don't know wether this is really a PAIR.
1360 This value is almost certainly not a valid section number, hence
1361 this specific case to avoid an assertion failure.
1362 Target specific swap_reloc_in routine should adjust that. */
1363 sym = bfd_abs_section_ptr->symbol_ptr_ptr;
1364 }
1365 else
1366 {
1367 /* PR 17512: file: 006-2964-0.004. */
1368 if (num > mdata->nsects)
1369 return FALSE;
1370
1371 /* A section number. */
1372 sym = mdata->sections[num - 1]->bfdsection->symbol_ptr_ptr;
1373 /* For a symbol defined in section S, the addend (stored in the
1374 binary) contains the address of the section. To comply with
1375 bfd convention, subtract the section address.
1376 Use the address from the header, so that the user can modify
1377 the vma of the section. */
1378 res->addend = -mdata->sections[num - 1]->addr;
1379 }
1380
1381 /* Note: Pairs for PPC LO/HI/HA are not scattered, but contain the offset
1382 in the lower 16bits of the address value. So we have to find the
1383 'symbol' from the preceding reloc. We do this even though the
1384 section symbol is probably not needed here, because NULL symbol
1385 values cause an assert in generic BFD code. This must be done in
1386 the PPC swap_reloc_in routine. */
1387 res->sym_ptr_ptr = sym;
1388
1389 return TRUE;
1390 }
1391
1392 /* Do most of the work for canonicalize_relocs on RAW: create internal
1393 representation RELOC and set most fields of RES using symbol table SYMS.
1394 Each target still has to set the howto of RES and possibly adjust other
1395 fields.
1396 Previously the Mach-O hook point was simply swap_in, but some targets
1397 (like arm64) don't follow the generic rules (symnum is a value for the
1398 non-scattered relocation ADDEND). */
1399
1400 bfd_boolean
bfd_mach_o_pre_canonicalize_one_reloc(bfd * abfd,struct mach_o_reloc_info_external * raw,bfd_mach_o_reloc_info * reloc,arelent * res,asymbol ** syms)1401 bfd_mach_o_pre_canonicalize_one_reloc (bfd *abfd,
1402 struct mach_o_reloc_info_external *raw,
1403 bfd_mach_o_reloc_info *reloc,
1404 arelent *res, asymbol **syms)
1405 {
1406 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1407 bfd_vma addr;
1408
1409 addr = bfd_get_32 (abfd, raw->r_address);
1410 res->sym_ptr_ptr = NULL;
1411 res->addend = 0;
1412
1413 if (addr & BFD_MACH_O_SR_SCATTERED)
1414 {
1415 unsigned int j;
1416 bfd_vma symnum = bfd_get_32 (abfd, raw->r_symbolnum);
1417
1418 /* Scattered relocation, can't be extern. */
1419 reloc->r_scattered = 1;
1420 reloc->r_extern = 0;
1421
1422 /* Extract section and offset from r_value (symnum). */
1423 reloc->r_value = symnum;
1424 /* FIXME: This breaks when a symbol in a reloc exactly follows the
1425 end of the data for the section (e.g. in a calculation of section
1426 data length). At present, the symbol will end up associated with
1427 the following section or, if it falls within alignment padding, as
1428 null - which will assert later. */
1429 for (j = 0; j < mdata->nsects; j++)
1430 {
1431 bfd_mach_o_section *sect = mdata->sections[j];
1432 if (symnum >= sect->addr && symnum < sect->addr + sect->size)
1433 {
1434 res->sym_ptr_ptr = sect->bfdsection->symbol_ptr_ptr;
1435 res->addend = symnum - sect->addr;
1436 break;
1437 }
1438 }
1439
1440 /* Extract the info and address fields from r_address. */
1441 reloc->r_type = BFD_MACH_O_GET_SR_TYPE (addr);
1442 reloc->r_length = BFD_MACH_O_GET_SR_LENGTH (addr);
1443 reloc->r_pcrel = addr & BFD_MACH_O_SR_PCREL;
1444 reloc->r_address = BFD_MACH_O_GET_SR_TYPE (addr);
1445 res->address = BFD_MACH_O_GET_SR_ADDRESS (addr);
1446 }
1447 else
1448 {
1449 /* Non-scattered relocation. */
1450 reloc->r_scattered = 0;
1451 reloc->r_address = addr;
1452 res->address = addr;
1453
1454 /* The value and info fields have to be extracted dependent on target
1455 endian-ness. */
1456 bfd_mach_o_swap_in_non_scattered_reloc (abfd, reloc, raw->r_symbolnum);
1457
1458 if (!bfd_mach_o_canonicalize_non_scattered_reloc (abfd, reloc,
1459 res, syms))
1460 return FALSE;
1461 }
1462
1463 /* We have set up a reloc with all the information present, so the swapper
1464 can modify address, value and addend fields, if necessary, to convey
1465 information in the generic BFD reloc that is mach-o specific. */
1466
1467 return TRUE;
1468 }
1469
1470 static int
bfd_mach_o_canonicalize_relocs(bfd * abfd,unsigned long filepos,unsigned long count,arelent * res,asymbol ** syms)1471 bfd_mach_o_canonicalize_relocs (bfd *abfd, unsigned long filepos,
1472 unsigned long count,
1473 arelent *res, asymbol **syms)
1474 {
1475 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1476 unsigned long i;
1477 struct mach_o_reloc_info_external *native_relocs;
1478 bfd_size_type native_size;
1479
1480 /* Allocate and read relocs. */
1481 native_size = count * BFD_MACH_O_RELENT_SIZE;
1482
1483 /* PR 17512: file: 09477b57. */
1484 if (native_size < count)
1485 return -1;
1486
1487 native_relocs =
1488 (struct mach_o_reloc_info_external *) bfd_malloc (native_size);
1489 if (native_relocs == NULL)
1490 return -1;
1491
1492 if (bfd_seek (abfd, filepos, SEEK_SET) != 0
1493 || bfd_bread (native_relocs, native_size, abfd) != native_size)
1494 goto err;
1495
1496 for (i = 0; i < count; i++)
1497 {
1498 if (!(*bed->_bfd_mach_o_canonicalize_one_reloc)(abfd, &native_relocs[i],
1499 &res[i], syms))
1500 goto err;
1501 }
1502 free (native_relocs);
1503 return i;
1504 err:
1505 free (native_relocs);
1506 return -1;
1507 }
1508
1509 long
bfd_mach_o_canonicalize_reloc(bfd * abfd,asection * asect,arelent ** rels,asymbol ** syms)1510 bfd_mach_o_canonicalize_reloc (bfd *abfd, asection *asect,
1511 arelent **rels, asymbol **syms)
1512 {
1513 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1514 unsigned long i;
1515 arelent *res;
1516
1517 if (asect->reloc_count == 0)
1518 return 0;
1519
1520 /* No need to go further if we don't know how to read relocs. */
1521 if (bed->_bfd_mach_o_canonicalize_one_reloc == NULL)
1522 return 0;
1523
1524 if (asect->relocation == NULL)
1525 {
1526 if (asect->reloc_count * sizeof (arelent) < asect->reloc_count)
1527 return -1;
1528 res = bfd_malloc (asect->reloc_count * sizeof (arelent));
1529 if (res == NULL)
1530 return -1;
1531
1532 if (bfd_mach_o_canonicalize_relocs (abfd, asect->rel_filepos,
1533 asect->reloc_count, res, syms) < 0)
1534 {
1535 free (res);
1536 return -1;
1537 }
1538 asect->relocation = res;
1539 }
1540
1541 res = asect->relocation;
1542 for (i = 0; i < asect->reloc_count; i++)
1543 rels[i] = &res[i];
1544 rels[i] = NULL;
1545
1546 return i;
1547 }
1548
1549 long
bfd_mach_o_get_dynamic_reloc_upper_bound(bfd * abfd)1550 bfd_mach_o_get_dynamic_reloc_upper_bound (bfd *abfd)
1551 {
1552 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1553
1554 if (mdata->dysymtab == NULL)
1555 return 1;
1556 return (mdata->dysymtab->nextrel + mdata->dysymtab->nlocrel + 1)
1557 * sizeof (arelent *);
1558 }
1559
1560 long
bfd_mach_o_canonicalize_dynamic_reloc(bfd * abfd,arelent ** rels,struct bfd_symbol ** syms)1561 bfd_mach_o_canonicalize_dynamic_reloc (bfd *abfd, arelent **rels,
1562 struct bfd_symbol **syms)
1563 {
1564 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1565 bfd_mach_o_dysymtab_command *dysymtab = mdata->dysymtab;
1566 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1567 unsigned long i;
1568 arelent *res;
1569
1570 if (dysymtab == NULL)
1571 return 0;
1572 if (dysymtab->nextrel == 0 && dysymtab->nlocrel == 0)
1573 return 0;
1574
1575 /* No need to go further if we don't know how to read relocs. */
1576 if (bed->_bfd_mach_o_canonicalize_one_reloc == NULL)
1577 return 0;
1578
1579 if (mdata->dyn_reloc_cache == NULL)
1580 {
1581 if ((dysymtab->nextrel + dysymtab->nlocrel) * sizeof (arelent)
1582 < (dysymtab->nextrel + dysymtab->nlocrel))
1583 return -1;
1584
1585 res = bfd_malloc ((dysymtab->nextrel + dysymtab->nlocrel)
1586 * sizeof (arelent));
1587 if (res == NULL)
1588 return -1;
1589
1590 if (bfd_mach_o_canonicalize_relocs (abfd, dysymtab->extreloff,
1591 dysymtab->nextrel, res, syms) < 0)
1592 {
1593 free (res);
1594 return -1;
1595 }
1596
1597 if (bfd_mach_o_canonicalize_relocs (abfd, dysymtab->locreloff,
1598 dysymtab->nlocrel,
1599 res + dysymtab->nextrel, syms) < 0)
1600 {
1601 free (res);
1602 return -1;
1603 }
1604
1605 mdata->dyn_reloc_cache = res;
1606 }
1607
1608 res = mdata->dyn_reloc_cache;
1609 for (i = 0; i < dysymtab->nextrel + dysymtab->nlocrel; i++)
1610 rels[i] = &res[i];
1611 rels[i] = NULL;
1612 return i;
1613 }
1614
1615 /* In addition to the need to byte-swap the symbol number, the bit positions
1616 of the fields in the relocation information vary per target endian-ness. */
1617
1618 static void
bfd_mach_o_swap_out_non_scattered_reloc(bfd * abfd,unsigned char * fields,bfd_mach_o_reloc_info * rel)1619 bfd_mach_o_swap_out_non_scattered_reloc (bfd *abfd, unsigned char *fields,
1620 bfd_mach_o_reloc_info *rel)
1621 {
1622 unsigned char info = 0;
1623
1624 BFD_ASSERT (rel->r_type <= 15);
1625 BFD_ASSERT (rel->r_length <= 3);
1626
1627 if (bfd_big_endian (abfd))
1628 {
1629 fields[0] = (rel->r_value >> 16) & 0xff;
1630 fields[1] = (rel->r_value >> 8) & 0xff;
1631 fields[2] = rel->r_value & 0xff;
1632 info |= rel->r_type << BFD_MACH_O_BE_TYPE_SHIFT;
1633 info |= rel->r_pcrel ? BFD_MACH_O_BE_PCREL : 0;
1634 info |= rel->r_length << BFD_MACH_O_BE_LENGTH_SHIFT;
1635 info |= rel->r_extern ? BFD_MACH_O_BE_EXTERN : 0;
1636 }
1637 else
1638 {
1639 fields[2] = (rel->r_value >> 16) & 0xff;
1640 fields[1] = (rel->r_value >> 8) & 0xff;
1641 fields[0] = rel->r_value & 0xff;
1642 info |= rel->r_type << BFD_MACH_O_LE_TYPE_SHIFT;
1643 info |= rel->r_pcrel ? BFD_MACH_O_LE_PCREL : 0;
1644 info |= rel->r_length << BFD_MACH_O_LE_LENGTH_SHIFT;
1645 info |= rel->r_extern ? BFD_MACH_O_LE_EXTERN : 0;
1646 }
1647 fields[3] = info;
1648 }
1649
1650 static bfd_boolean
bfd_mach_o_write_relocs(bfd * abfd,bfd_mach_o_section * section)1651 bfd_mach_o_write_relocs (bfd *abfd, bfd_mach_o_section *section)
1652 {
1653 unsigned int i;
1654 arelent **entries;
1655 asection *sec;
1656 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1657
1658 sec = section->bfdsection;
1659 if (sec->reloc_count == 0)
1660 return TRUE;
1661
1662 if (bed->_bfd_mach_o_swap_reloc_out == NULL)
1663 return TRUE;
1664
1665 if (bfd_seek (abfd, section->reloff, SEEK_SET) != 0)
1666 return FALSE;
1667
1668 /* Convert and write. */
1669 entries = section->bfdsection->orelocation;
1670 for (i = 0; i < section->nreloc; i++)
1671 {
1672 arelent *rel = entries[i];
1673 struct mach_o_reloc_info_external raw;
1674 bfd_mach_o_reloc_info info, *pinfo = &info;
1675
1676 /* Convert relocation to an intermediate representation. */
1677 if (!(*bed->_bfd_mach_o_swap_reloc_out) (rel, pinfo))
1678 return FALSE;
1679
1680 /* Lower the relocation info. */
1681 if (pinfo->r_scattered)
1682 {
1683 unsigned long v;
1684
1685 v = BFD_MACH_O_SR_SCATTERED
1686 | (pinfo->r_pcrel ? BFD_MACH_O_SR_PCREL : 0)
1687 | BFD_MACH_O_SET_SR_LENGTH (pinfo->r_length)
1688 | BFD_MACH_O_SET_SR_TYPE (pinfo->r_type)
1689 | BFD_MACH_O_SET_SR_ADDRESS (pinfo->r_address);
1690 /* Note: scattered relocs have field in reverse order... */
1691 bfd_put_32 (abfd, v, raw.r_address);
1692 bfd_put_32 (abfd, pinfo->r_value, raw.r_symbolnum);
1693 }
1694 else
1695 {
1696 bfd_put_32 (abfd, pinfo->r_address, raw.r_address);
1697 bfd_mach_o_swap_out_non_scattered_reloc (abfd, raw.r_symbolnum,
1698 pinfo);
1699 }
1700
1701 if (bfd_bwrite (&raw, BFD_MACH_O_RELENT_SIZE, abfd)
1702 != BFD_MACH_O_RELENT_SIZE)
1703 return FALSE;
1704 }
1705 return TRUE;
1706 }
1707
1708 static bfd_boolean
bfd_mach_o_write_section_32(bfd * abfd,bfd_mach_o_section * section)1709 bfd_mach_o_write_section_32 (bfd *abfd, bfd_mach_o_section *section)
1710 {
1711 struct mach_o_section_32_external raw;
1712
1713 memcpy (raw.sectname, section->sectname, 16);
1714 memcpy (raw.segname, section->segname, 16);
1715 bfd_h_put_32 (abfd, section->addr, raw.addr);
1716 bfd_h_put_32 (abfd, section->size, raw.size);
1717 bfd_h_put_32 (abfd, section->offset, raw.offset);
1718 bfd_h_put_32 (abfd, section->align, raw.align);
1719 bfd_h_put_32 (abfd, section->reloff, raw.reloff);
1720 bfd_h_put_32 (abfd, section->nreloc, raw.nreloc);
1721 bfd_h_put_32 (abfd, section->flags, raw.flags);
1722 bfd_h_put_32 (abfd, section->reserved1, raw.reserved1);
1723 bfd_h_put_32 (abfd, section->reserved2, raw.reserved2);
1724
1725 if (bfd_bwrite (&raw, BFD_MACH_O_SECTION_SIZE, abfd)
1726 != BFD_MACH_O_SECTION_SIZE)
1727 return FALSE;
1728
1729 return TRUE;
1730 }
1731
1732 static bfd_boolean
bfd_mach_o_write_section_64(bfd * abfd,bfd_mach_o_section * section)1733 bfd_mach_o_write_section_64 (bfd *abfd, bfd_mach_o_section *section)
1734 {
1735 struct mach_o_section_64_external raw;
1736
1737 memcpy (raw.sectname, section->sectname, 16);
1738 memcpy (raw.segname, section->segname, 16);
1739 bfd_h_put_64 (abfd, section->addr, raw.addr);
1740 bfd_h_put_64 (abfd, section->size, raw.size);
1741 bfd_h_put_32 (abfd, section->offset, raw.offset);
1742 bfd_h_put_32 (abfd, section->align, raw.align);
1743 bfd_h_put_32 (abfd, section->reloff, raw.reloff);
1744 bfd_h_put_32 (abfd, section->nreloc, raw.nreloc);
1745 bfd_h_put_32 (abfd, section->flags, raw.flags);
1746 bfd_h_put_32 (abfd, section->reserved1, raw.reserved1);
1747 bfd_h_put_32 (abfd, section->reserved2, raw.reserved2);
1748 bfd_h_put_32 (abfd, section->reserved3, raw.reserved3);
1749
1750 if (bfd_bwrite (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd)
1751 != BFD_MACH_O_SECTION_64_SIZE)
1752 return FALSE;
1753
1754 return TRUE;
1755 }
1756
1757 static bfd_boolean
bfd_mach_o_write_segment_32(bfd * abfd,bfd_mach_o_load_command * command)1758 bfd_mach_o_write_segment_32 (bfd *abfd, bfd_mach_o_load_command *command)
1759 {
1760 struct mach_o_segment_command_32_external raw;
1761 bfd_mach_o_segment_command *seg = &command->command.segment;
1762 bfd_mach_o_section *sec;
1763
1764 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT);
1765
1766 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1767 if (!bfd_mach_o_write_relocs (abfd, sec))
1768 return FALSE;
1769
1770 memcpy (raw.segname, seg->segname, 16);
1771 bfd_h_put_32 (abfd, seg->vmaddr, raw.vmaddr);
1772 bfd_h_put_32 (abfd, seg->vmsize, raw.vmsize);
1773 bfd_h_put_32 (abfd, seg->fileoff, raw.fileoff);
1774 bfd_h_put_32 (abfd, seg->filesize, raw.filesize);
1775 bfd_h_put_32 (abfd, seg->maxprot, raw.maxprot);
1776 bfd_h_put_32 (abfd, seg->initprot, raw.initprot);
1777 bfd_h_put_32 (abfd, seg->nsects, raw.nsects);
1778 bfd_h_put_32 (abfd, seg->flags, raw.flags);
1779
1780 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1781 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1782 return FALSE;
1783
1784 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1785 if (!bfd_mach_o_write_section_32 (abfd, sec))
1786 return FALSE;
1787
1788 return TRUE;
1789 }
1790
1791 static bfd_boolean
bfd_mach_o_write_segment_64(bfd * abfd,bfd_mach_o_load_command * command)1792 bfd_mach_o_write_segment_64 (bfd *abfd, bfd_mach_o_load_command *command)
1793 {
1794 struct mach_o_segment_command_64_external raw;
1795 bfd_mach_o_segment_command *seg = &command->command.segment;
1796 bfd_mach_o_section *sec;
1797
1798 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64);
1799
1800 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1801 if (!bfd_mach_o_write_relocs (abfd, sec))
1802 return FALSE;
1803
1804 memcpy (raw.segname, seg->segname, 16);
1805 bfd_h_put_64 (abfd, seg->vmaddr, raw.vmaddr);
1806 bfd_h_put_64 (abfd, seg->vmsize, raw.vmsize);
1807 bfd_h_put_64 (abfd, seg->fileoff, raw.fileoff);
1808 bfd_h_put_64 (abfd, seg->filesize, raw.filesize);
1809 bfd_h_put_32 (abfd, seg->maxprot, raw.maxprot);
1810 bfd_h_put_32 (abfd, seg->initprot, raw.initprot);
1811 bfd_h_put_32 (abfd, seg->nsects, raw.nsects);
1812 bfd_h_put_32 (abfd, seg->flags, raw.flags);
1813
1814 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1815 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1816 return FALSE;
1817
1818 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1819 if (!bfd_mach_o_write_section_64 (abfd, sec))
1820 return FALSE;
1821
1822 return TRUE;
1823 }
1824
1825 static bfd_boolean
bfd_mach_o_write_symtab_content(bfd * abfd,bfd_mach_o_symtab_command * sym)1826 bfd_mach_o_write_symtab_content (bfd *abfd, bfd_mach_o_symtab_command *sym)
1827 {
1828 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1829 unsigned long i;
1830 unsigned int wide = bfd_mach_o_wide_p (abfd);
1831 struct bfd_strtab_hash *strtab;
1832 asymbol **symbols = bfd_get_outsymbols (abfd);
1833 int padlen;
1834
1835 /* Write the symbols first. */
1836 if (bfd_seek (abfd, sym->symoff, SEEK_SET) != 0)
1837 return FALSE;
1838
1839 strtab = _bfd_stringtab_init ();
1840 if (strtab == NULL)
1841 return FALSE;
1842
1843 if (sym->nsyms > 0)
1844 /* Although we don't strictly need to do this, for compatibility with
1845 Darwin system tools, actually output an empty string for the index
1846 0 entry. */
1847 _bfd_stringtab_add (strtab, "", TRUE, FALSE);
1848
1849 for (i = 0; i < sym->nsyms; i++)
1850 {
1851 bfd_size_type str_index;
1852 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
1853
1854 if (s->symbol.name == 0 || s->symbol.name[0] == '\0')
1855 /* An index of 0 always means the empty string. */
1856 str_index = 0;
1857 else
1858 {
1859 str_index = _bfd_stringtab_add (strtab, s->symbol.name, TRUE, FALSE);
1860
1861 if (str_index == (bfd_size_type) -1)
1862 goto err;
1863 }
1864
1865 if (wide)
1866 {
1867 struct mach_o_nlist_64_external raw;
1868
1869 bfd_h_put_32 (abfd, str_index, raw.n_strx);
1870 bfd_h_put_8 (abfd, s->n_type, raw.n_type);
1871 bfd_h_put_8 (abfd, s->n_sect, raw.n_sect);
1872 bfd_h_put_16 (abfd, s->n_desc, raw.n_desc);
1873 bfd_h_put_64 (abfd, s->symbol.section->vma + s->symbol.value,
1874 raw.n_value);
1875
1876 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1877 goto err;
1878 }
1879 else
1880 {
1881 struct mach_o_nlist_external raw;
1882
1883 bfd_h_put_32 (abfd, str_index, raw.n_strx);
1884 bfd_h_put_8 (abfd, s->n_type, raw.n_type);
1885 bfd_h_put_8 (abfd, s->n_sect, raw.n_sect);
1886 bfd_h_put_16 (abfd, s->n_desc, raw.n_desc);
1887 bfd_h_put_32 (abfd, s->symbol.section->vma + s->symbol.value,
1888 raw.n_value);
1889
1890 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1891 goto err;
1892 }
1893 }
1894 sym->strsize = _bfd_stringtab_size (strtab);
1895 sym->stroff = mdata->filelen;
1896 mdata->filelen += sym->strsize;
1897
1898 if (bfd_seek (abfd, sym->stroff, SEEK_SET) != 0)
1899 goto err;
1900
1901 if (_bfd_stringtab_emit (abfd, strtab) != TRUE)
1902 goto err;
1903
1904 /* Pad string table. */
1905 padlen = bfd_mach_o_pad4 (abfd, sym->strsize);
1906 if (padlen < 0)
1907 return FALSE;
1908 mdata->filelen += padlen;
1909 sym->strsize += padlen;
1910
1911 return TRUE;
1912
1913 err:
1914 _bfd_stringtab_free (strtab);
1915 sym->strsize = 0;
1916 return FALSE;
1917 }
1918
1919 static bfd_boolean
bfd_mach_o_write_symtab(bfd * abfd,bfd_mach_o_load_command * command)1920 bfd_mach_o_write_symtab (bfd *abfd, bfd_mach_o_load_command *command)
1921 {
1922 bfd_mach_o_symtab_command *sym = &command->command.symtab;
1923 struct mach_o_symtab_command_external raw;
1924
1925 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB);
1926
1927 /* The command. */
1928 bfd_h_put_32 (abfd, sym->symoff, raw.symoff);
1929 bfd_h_put_32 (abfd, sym->nsyms, raw.nsyms);
1930 bfd_h_put_32 (abfd, sym->stroff, raw.stroff);
1931 bfd_h_put_32 (abfd, sym->strsize, raw.strsize);
1932
1933 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1934 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1935 return FALSE;
1936
1937 return TRUE;
1938 }
1939
1940 /* Count the number of indirect symbols in the image.
1941 Requires that the sections are in their final order. */
1942
1943 static unsigned int
bfd_mach_o_count_indirect_symbols(bfd * abfd,bfd_mach_o_data_struct * mdata)1944 bfd_mach_o_count_indirect_symbols (bfd *abfd, bfd_mach_o_data_struct *mdata)
1945 {
1946 unsigned int i;
1947 unsigned int nisyms = 0;
1948
1949 for (i = 0; i < mdata->nsects; ++i)
1950 {
1951 bfd_mach_o_section *sec = mdata->sections[i];
1952
1953 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
1954 {
1955 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
1956 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
1957 case BFD_MACH_O_S_SYMBOL_STUBS:
1958 nisyms += bfd_mach_o_section_get_nbr_indirect (abfd, sec);
1959 break;
1960 default:
1961 break;
1962 }
1963 }
1964 return nisyms;
1965 }
1966
1967 /* Create the dysymtab. */
1968
1969 static bfd_boolean
bfd_mach_o_build_dysymtab(bfd * abfd,bfd_mach_o_dysymtab_command * cmd)1970 bfd_mach_o_build_dysymtab (bfd *abfd, bfd_mach_o_dysymtab_command *cmd)
1971 {
1972 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1973
1974 /* TODO:
1975 We are not going to try and fill these in yet and, moreover, we are
1976 going to bail if they are already set. */
1977 if (cmd->nmodtab != 0
1978 || cmd->ntoc != 0
1979 || cmd->nextrefsyms != 0)
1980 {
1981 (*_bfd_error_handler) (_("sorry: modtab, toc and extrefsyms are not yet"
1982 " implemented for dysymtab commands."));
1983 return FALSE;
1984 }
1985
1986 cmd->ilocalsym = 0;
1987
1988 if (bfd_get_symcount (abfd) > 0)
1989 {
1990 asymbol **symbols = bfd_get_outsymbols (abfd);
1991 unsigned long i;
1992
1993 /* Count the number of each kind of symbol. */
1994 for (i = 0; i < bfd_get_symcount (abfd); ++i)
1995 {
1996 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
1997 if (s->n_type & (BFD_MACH_O_N_EXT | BFD_MACH_O_N_PEXT))
1998 break;
1999 }
2000 cmd->nlocalsym = i;
2001 cmd->iextdefsym = i;
2002 for (; i < bfd_get_symcount (abfd); ++i)
2003 {
2004 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2005 if ((s->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_UNDF)
2006 break;
2007 }
2008 cmd->nextdefsym = i - cmd->nlocalsym;
2009 cmd->iundefsym = cmd->nextdefsym + cmd->iextdefsym;
2010 cmd->nundefsym = bfd_get_symcount (abfd)
2011 - cmd->nlocalsym
2012 - cmd->nextdefsym;
2013 }
2014 else
2015 {
2016 cmd->nlocalsym = 0;
2017 cmd->iextdefsym = 0;
2018 cmd->nextdefsym = 0;
2019 cmd->iundefsym = 0;
2020 cmd->nundefsym = 0;
2021 }
2022
2023 cmd->nindirectsyms = bfd_mach_o_count_indirect_symbols (abfd, mdata);
2024 if (cmd->nindirectsyms > 0)
2025 {
2026 unsigned i;
2027 unsigned n;
2028
2029 mdata->filelen = FILE_ALIGN (mdata->filelen, 2);
2030 cmd->indirectsymoff = mdata->filelen;
2031 mdata->filelen += cmd->nindirectsyms * 4;
2032
2033 if (cmd->nindirectsyms * 4 < cmd->nindirectsyms)
2034 return FALSE;
2035 cmd->indirect_syms = bfd_zalloc (abfd, cmd->nindirectsyms * 4);
2036 if (cmd->indirect_syms == NULL)
2037 return FALSE;
2038
2039 n = 0;
2040 for (i = 0; i < mdata->nsects; ++i)
2041 {
2042 bfd_mach_o_section *sec = mdata->sections[i];
2043
2044 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2045 {
2046 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
2047 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
2048 case BFD_MACH_O_S_SYMBOL_STUBS:
2049 {
2050 unsigned j, num;
2051 bfd_mach_o_asymbol **isyms = sec->indirect_syms;
2052
2053 num = bfd_mach_o_section_get_nbr_indirect (abfd, sec);
2054 if (isyms == NULL || num == 0)
2055 break;
2056 /* Record the starting index in the reserved1 field. */
2057 sec->reserved1 = n;
2058 for (j = 0; j < num; j++, n++)
2059 {
2060 if (isyms[j] == NULL)
2061 cmd->indirect_syms[n] = BFD_MACH_O_INDIRECT_SYM_LOCAL;
2062 else if (isyms[j]->symbol.section == bfd_abs_section_ptr
2063 && ! (isyms[j]->n_type & BFD_MACH_O_N_EXT))
2064 cmd->indirect_syms[n] = BFD_MACH_O_INDIRECT_SYM_LOCAL
2065 | BFD_MACH_O_INDIRECT_SYM_ABS;
2066 else
2067 cmd->indirect_syms[n] = isyms[j]->symbol.udata.i;
2068 }
2069 }
2070 break;
2071 default:
2072 break;
2073 }
2074 }
2075 }
2076
2077 return TRUE;
2078 }
2079
2080 /* Write a dysymtab command.
2081 TODO: Possibly coalesce writes of smaller objects. */
2082
2083 static bfd_boolean
bfd_mach_o_write_dysymtab(bfd * abfd,bfd_mach_o_load_command * command)2084 bfd_mach_o_write_dysymtab (bfd *abfd, bfd_mach_o_load_command *command)
2085 {
2086 bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab;
2087
2088 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB);
2089
2090 if (cmd->nmodtab != 0)
2091 {
2092 unsigned int i;
2093
2094 if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0)
2095 return FALSE;
2096
2097 for (i = 0; i < cmd->nmodtab; i++)
2098 {
2099 bfd_mach_o_dylib_module *module = &cmd->dylib_module[i];
2100 unsigned int iinit;
2101 unsigned int ninit;
2102
2103 iinit = module->iinit & 0xffff;
2104 iinit |= ((module->iterm & 0xffff) << 16);
2105
2106 ninit = module->ninit & 0xffff;
2107 ninit |= ((module->nterm & 0xffff) << 16);
2108
2109 if (bfd_mach_o_wide_p (abfd))
2110 {
2111 struct mach_o_dylib_module_64_external w;
2112
2113 bfd_h_put_32 (abfd, module->module_name_idx, &w.module_name);
2114 bfd_h_put_32 (abfd, module->iextdefsym, &w.iextdefsym);
2115 bfd_h_put_32 (abfd, module->nextdefsym, &w.nextdefsym);
2116 bfd_h_put_32 (abfd, module->irefsym, &w.irefsym);
2117 bfd_h_put_32 (abfd, module->nrefsym, &w.nrefsym);
2118 bfd_h_put_32 (abfd, module->ilocalsym, &w.ilocalsym);
2119 bfd_h_put_32 (abfd, module->nlocalsym, &w.nlocalsym);
2120 bfd_h_put_32 (abfd, module->iextrel, &w.iextrel);
2121 bfd_h_put_32 (abfd, module->nextrel, &w.nextrel);
2122 bfd_h_put_32 (abfd, iinit, &w.iinit_iterm);
2123 bfd_h_put_32 (abfd, ninit, &w.ninit_nterm);
2124 bfd_h_put_64 (abfd, module->objc_module_info_addr,
2125 &w.objc_module_info_addr);
2126 bfd_h_put_32 (abfd, module->objc_module_info_size,
2127 &w.objc_module_info_size);
2128
2129 if (bfd_bwrite ((void *) &w, sizeof (w), abfd) != sizeof (w))
2130 return FALSE;
2131 }
2132 else
2133 {
2134 struct mach_o_dylib_module_external n;
2135
2136 bfd_h_put_32 (abfd, module->module_name_idx, &n.module_name);
2137 bfd_h_put_32 (abfd, module->iextdefsym, &n.iextdefsym);
2138 bfd_h_put_32 (abfd, module->nextdefsym, &n.nextdefsym);
2139 bfd_h_put_32 (abfd, module->irefsym, &n.irefsym);
2140 bfd_h_put_32 (abfd, module->nrefsym, &n.nrefsym);
2141 bfd_h_put_32 (abfd, module->ilocalsym, &n.ilocalsym);
2142 bfd_h_put_32 (abfd, module->nlocalsym, &n.nlocalsym);
2143 bfd_h_put_32 (abfd, module->iextrel, &n.iextrel);
2144 bfd_h_put_32 (abfd, module->nextrel, &n.nextrel);
2145 bfd_h_put_32 (abfd, iinit, &n.iinit_iterm);
2146 bfd_h_put_32 (abfd, ninit, &n.ninit_nterm);
2147 bfd_h_put_32 (abfd, module->objc_module_info_addr,
2148 &n.objc_module_info_addr);
2149 bfd_h_put_32 (abfd, module->objc_module_info_size,
2150 &n.objc_module_info_size);
2151
2152 if (bfd_bwrite ((void *) &n, sizeof (n), abfd) != sizeof (n))
2153 return FALSE;
2154 }
2155 }
2156 }
2157
2158 if (cmd->ntoc != 0)
2159 {
2160 unsigned int i;
2161
2162 if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0)
2163 return FALSE;
2164
2165 for (i = 0; i < cmd->ntoc; i++)
2166 {
2167 struct mach_o_dylib_table_of_contents_external raw;
2168 bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i];
2169
2170 bfd_h_put_32 (abfd, toc->symbol_index, &raw.symbol_index);
2171 bfd_h_put_32 (abfd, toc->module_index, &raw.module_index);
2172
2173 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
2174 return FALSE;
2175 }
2176 }
2177
2178 if (cmd->nindirectsyms > 0)
2179 {
2180 unsigned int i;
2181
2182 if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0)
2183 return FALSE;
2184
2185 for (i = 0; i < cmd->nindirectsyms; ++i)
2186 {
2187 unsigned char raw[4];
2188
2189 bfd_h_put_32 (abfd, cmd->indirect_syms[i], &raw);
2190 if (bfd_bwrite (raw, sizeof (raw), abfd) != sizeof (raw))
2191 return FALSE;
2192 }
2193 }
2194
2195 if (cmd->nextrefsyms != 0)
2196 {
2197 unsigned int i;
2198
2199 if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0)
2200 return FALSE;
2201
2202 for (i = 0; i < cmd->nextrefsyms; i++)
2203 {
2204 unsigned long v;
2205 unsigned char raw[4];
2206 bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i];
2207
2208 /* Fields isym and flags are written as bit-fields, thus we need
2209 a specific processing for endianness. */
2210
2211 if (bfd_big_endian (abfd))
2212 {
2213 v = ((ref->isym & 0xffffff) << 8);
2214 v |= ref->flags & 0xff;
2215 }
2216 else
2217 {
2218 v = ref->isym & 0xffffff;
2219 v |= ((ref->flags & 0xff) << 24);
2220 }
2221
2222 bfd_h_put_32 (abfd, v, raw);
2223 if (bfd_bwrite (raw, sizeof (raw), abfd) != sizeof (raw))
2224 return FALSE;
2225 }
2226 }
2227
2228 /* The command. */
2229 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0)
2230 return FALSE;
2231 else
2232 {
2233 struct mach_o_dysymtab_command_external raw;
2234
2235 bfd_h_put_32 (abfd, cmd->ilocalsym, &raw.ilocalsym);
2236 bfd_h_put_32 (abfd, cmd->nlocalsym, &raw.nlocalsym);
2237 bfd_h_put_32 (abfd, cmd->iextdefsym, &raw.iextdefsym);
2238 bfd_h_put_32 (abfd, cmd->nextdefsym, &raw.nextdefsym);
2239 bfd_h_put_32 (abfd, cmd->iundefsym, &raw.iundefsym);
2240 bfd_h_put_32 (abfd, cmd->nundefsym, &raw.nundefsym);
2241 bfd_h_put_32 (abfd, cmd->tocoff, &raw.tocoff);
2242 bfd_h_put_32 (abfd, cmd->ntoc, &raw.ntoc);
2243 bfd_h_put_32 (abfd, cmd->modtaboff, &raw.modtaboff);
2244 bfd_h_put_32 (abfd, cmd->nmodtab, &raw.nmodtab);
2245 bfd_h_put_32 (abfd, cmd->extrefsymoff, &raw.extrefsymoff);
2246 bfd_h_put_32 (abfd, cmd->nextrefsyms, &raw.nextrefsyms);
2247 bfd_h_put_32 (abfd, cmd->indirectsymoff, &raw.indirectsymoff);
2248 bfd_h_put_32 (abfd, cmd->nindirectsyms, &raw.nindirectsyms);
2249 bfd_h_put_32 (abfd, cmd->extreloff, &raw.extreloff);
2250 bfd_h_put_32 (abfd, cmd->nextrel, &raw.nextrel);
2251 bfd_h_put_32 (abfd, cmd->locreloff, &raw.locreloff);
2252 bfd_h_put_32 (abfd, cmd->nlocrel, &raw.nlocrel);
2253
2254 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
2255 return FALSE;
2256 }
2257
2258 return TRUE;
2259 }
2260
2261 static unsigned
bfd_mach_o_primary_symbol_sort_key(bfd_mach_o_asymbol * s)2262 bfd_mach_o_primary_symbol_sort_key (bfd_mach_o_asymbol *s)
2263 {
2264 unsigned mtyp = s->n_type & BFD_MACH_O_N_TYPE;
2265
2266 /* Just leave debug symbols where they are (pretend they are local, and
2267 then they will just be sorted on position). */
2268 if (s->n_type & BFD_MACH_O_N_STAB)
2269 return 0;
2270
2271 /* Local (we should never see an undefined local AFAICT). */
2272 if (! (s->n_type & (BFD_MACH_O_N_EXT | BFD_MACH_O_N_PEXT)))
2273 return 0;
2274
2275 /* Common symbols look like undefined externs. */
2276 if (mtyp == BFD_MACH_O_N_UNDF)
2277 return 2;
2278
2279 /* A defined non-local, non-debug symbol. */
2280 return 1;
2281 }
2282
2283 static int
bfd_mach_o_cf_symbols(const void * a,const void * b)2284 bfd_mach_o_cf_symbols (const void *a, const void *b)
2285 {
2286 bfd_mach_o_asymbol *sa = *(bfd_mach_o_asymbol **) a;
2287 bfd_mach_o_asymbol *sb = *(bfd_mach_o_asymbol **) b;
2288 unsigned int soa, sob;
2289
2290 soa = bfd_mach_o_primary_symbol_sort_key (sa);
2291 sob = bfd_mach_o_primary_symbol_sort_key (sb);
2292 if (soa < sob)
2293 return -1;
2294
2295 if (soa > sob)
2296 return 1;
2297
2298 /* If it's local or stab, just preserve the input order. */
2299 if (soa == 0)
2300 {
2301 if (sa->symbol.udata.i < sb->symbol.udata.i)
2302 return -1;
2303 if (sa->symbol.udata.i > sb->symbol.udata.i)
2304 return 1;
2305
2306 /* This is probably an error. */
2307 return 0;
2308 }
2309
2310 /* The second sort key is name. */
2311 return strcmp (sa->symbol.name, sb->symbol.name);
2312 }
2313
2314 /* Process the symbols.
2315
2316 This should be OK for single-module files - but it is not likely to work
2317 for multi-module shared libraries.
2318
2319 (a) If the application has not filled in the relevant mach-o fields, make
2320 an estimate.
2321
2322 (b) Order them, like this:
2323 ( i) local.
2324 (unsorted)
2325 ( ii) external defined
2326 (by name)
2327 (iii) external undefined/common
2328 (by name)
2329 ( iv) common
2330 (by name)
2331 */
2332
2333 static bfd_boolean
bfd_mach_o_mangle_symbols(bfd * abfd)2334 bfd_mach_o_mangle_symbols (bfd *abfd)
2335 {
2336 unsigned long i;
2337 asymbol **symbols = bfd_get_outsymbols (abfd);
2338
2339 if (symbols == NULL || bfd_get_symcount (abfd) == 0)
2340 return TRUE;
2341
2342 for (i = 0; i < bfd_get_symcount (abfd); i++)
2343 {
2344 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2345
2346 /* We use this value, which is out-of-range as a symbol index, to signal
2347 that the mach-o-specific data are not filled in and need to be created
2348 from the bfd values. It is much preferable for the application to do
2349 this, since more meaningful diagnostics can be made that way. */
2350
2351 if (s->symbol.udata.i == SYM_MACHO_FIELDS_UNSET)
2352 {
2353 /* No symbol information has been set - therefore determine
2354 it from the bfd symbol flags/info. */
2355 if (s->symbol.section == bfd_abs_section_ptr)
2356 s->n_type = BFD_MACH_O_N_ABS;
2357 else if (s->symbol.section == bfd_und_section_ptr)
2358 {
2359 s->n_type = BFD_MACH_O_N_UNDF;
2360 if (s->symbol.flags & BSF_WEAK)
2361 s->n_desc |= BFD_MACH_O_N_WEAK_REF;
2362 /* mach-o automatically makes undefined symbols extern. */
2363 s->n_type |= BFD_MACH_O_N_EXT;
2364 s->symbol.flags |= BSF_GLOBAL;
2365 }
2366 else if (s->symbol.section == bfd_com_section_ptr)
2367 {
2368 s->n_type = BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT;
2369 s->symbol.flags |= BSF_GLOBAL;
2370 }
2371 else
2372 s->n_type = BFD_MACH_O_N_SECT;
2373
2374 if (s->symbol.flags & BSF_GLOBAL)
2375 s->n_type |= BFD_MACH_O_N_EXT;
2376 }
2377
2378 /* Put the section index in, where required. */
2379 if ((s->symbol.section != bfd_abs_section_ptr
2380 && s->symbol.section != bfd_und_section_ptr
2381 && s->symbol.section != bfd_com_section_ptr)
2382 || ((s->n_type & BFD_MACH_O_N_STAB) != 0
2383 && s->symbol.name == NULL))
2384 s->n_sect = s->symbol.section->output_section->target_index;
2385
2386 /* Number to preserve order for local and debug syms. */
2387 s->symbol.udata.i = i;
2388 }
2389
2390 /* Sort the symbols. */
2391 qsort ((void *) symbols, (size_t) bfd_get_symcount (abfd),
2392 sizeof (asymbol *), bfd_mach_o_cf_symbols);
2393
2394 for (i = 0; i < bfd_get_symcount (abfd); ++i)
2395 {
2396 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2397 s->symbol.udata.i = i; /* renumber. */
2398 }
2399
2400 return TRUE;
2401 }
2402
2403 /* We build a flat table of sections, which can be re-ordered if necessary.
2404 Fill in the section number and other mach-o-specific data. */
2405
2406 static bfd_boolean
bfd_mach_o_mangle_sections(bfd * abfd,bfd_mach_o_data_struct * mdata)2407 bfd_mach_o_mangle_sections (bfd *abfd, bfd_mach_o_data_struct *mdata)
2408 {
2409 asection *sec;
2410 unsigned target_index;
2411 unsigned nsect;
2412
2413 nsect = bfd_count_sections (abfd);
2414
2415 /* Don't do it if it's already set - assume the application knows what it's
2416 doing. */
2417 if (mdata->nsects == nsect
2418 && (mdata->nsects == 0 || mdata->sections != NULL))
2419 return TRUE;
2420
2421 /* We need to check that this can be done... */
2422 if (nsect > 255)
2423 {
2424 (*_bfd_error_handler) (_("mach-o: there are too many sections (%u)"
2425 " maximum is 255,\n"), nsect);
2426 return FALSE;
2427 }
2428
2429 mdata->nsects = nsect;
2430 mdata->sections = bfd_alloc2 (abfd,
2431 mdata->nsects, sizeof (bfd_mach_o_section *));
2432 if (mdata->sections == NULL)
2433 return FALSE;
2434
2435 /* Create Mach-O sections.
2436 Section type, attribute and align should have been set when the
2437 section was created - either read in or specified. */
2438 target_index = 0;
2439 for (sec = abfd->sections; sec; sec = sec->next)
2440 {
2441 unsigned bfd_align = bfd_get_section_alignment (abfd, sec);
2442 bfd_mach_o_section *msect = bfd_mach_o_get_mach_o_section (sec);
2443
2444 mdata->sections[target_index] = msect;
2445
2446 msect->addr = bfd_get_section_vma (abfd, sec);
2447 msect->size = bfd_get_section_size (sec);
2448
2449 /* Use the largest alignment set, in case it was bumped after the
2450 section was created. */
2451 msect->align = msect->align > bfd_align ? msect->align : bfd_align;
2452
2453 msect->offset = 0;
2454 sec->target_index = ++target_index;
2455 }
2456
2457 return TRUE;
2458 }
2459
2460 bfd_boolean
bfd_mach_o_write_contents(bfd * abfd)2461 bfd_mach_o_write_contents (bfd *abfd)
2462 {
2463 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2464 bfd_mach_o_load_command *cmd;
2465 bfd_mach_o_symtab_command *symtab = NULL;
2466 bfd_mach_o_dysymtab_command *dysymtab = NULL;
2467 bfd_mach_o_segment_command *linkedit = NULL;
2468
2469 /* Make the commands, if not already present. */
2470 if (!abfd->output_has_begun && !bfd_mach_o_build_commands (abfd))
2471 return FALSE;
2472 abfd->output_has_begun = TRUE;
2473
2474 /* Write the header. */
2475 if (!bfd_mach_o_write_header (abfd, &mdata->header))
2476 return FALSE;
2477
2478 /* First pass: allocate the linkedit segment. */
2479 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
2480 switch (cmd->type)
2481 {
2482 case BFD_MACH_O_LC_SEGMENT_64:
2483 case BFD_MACH_O_LC_SEGMENT:
2484 if (strcmp (cmd->command.segment.segname, "__LINKEDIT") == 0)
2485 linkedit = &cmd->command.segment;
2486 break;
2487 case BFD_MACH_O_LC_SYMTAB:
2488 symtab = &cmd->command.symtab;
2489 break;
2490 case BFD_MACH_O_LC_DYSYMTAB:
2491 dysymtab = &cmd->command.dysymtab;
2492 break;
2493 case BFD_MACH_O_LC_DYLD_INFO:
2494 {
2495 bfd_mach_o_dyld_info_command *di = &cmd->command.dyld_info;
2496
2497 if (di->rebase_size != 0)
2498 {
2499 di->rebase_off = mdata->filelen;
2500 mdata->filelen += di->rebase_size;
2501 }
2502 if (di->bind_size != 0)
2503 {
2504 di->bind_off = mdata->filelen;
2505 mdata->filelen += di->bind_size;
2506 }
2507 if (di->weak_bind_size != 0)
2508 {
2509 di->weak_bind_off = mdata->filelen;
2510 mdata->filelen += di->weak_bind_size;
2511 }
2512 if (di->lazy_bind_size != 0)
2513 {
2514 di->lazy_bind_off = mdata->filelen;
2515 mdata->filelen += di->lazy_bind_size;
2516 }
2517 if (di->export_size != 0)
2518 {
2519 di->export_off = mdata->filelen;
2520 mdata->filelen += di->export_size;
2521 }
2522 }
2523 break;
2524 case BFD_MACH_O_LC_LOAD_DYLIB:
2525 case BFD_MACH_O_LC_LOAD_DYLINKER:
2526 case BFD_MACH_O_LC_MAIN:
2527 /* Nothing to do. */
2528 break;
2529 default:
2530 (*_bfd_error_handler)
2531 (_("unable to allocate data for load command 0x%lx"),
2532 (unsigned long) cmd->type);
2533 break;
2534 }
2535
2536 /* Specially handle symtab and dysymtab. */
2537
2538 /* Pre-allocate the symbol table (but not the string table). The reason
2539 is that the dysymtab is after the symbol table but before the string
2540 table (required by the native strip tool). */
2541 if (symtab != NULL)
2542 {
2543 unsigned int symlen;
2544 unsigned int wide = bfd_mach_o_wide_p (abfd);
2545
2546 symlen = wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE;
2547
2548 /* Align for symbols. */
2549 mdata->filelen = FILE_ALIGN (mdata->filelen, wide ? 3 : 2);
2550 symtab->symoff = mdata->filelen;
2551
2552 symtab->nsyms = bfd_get_symcount (abfd);
2553 mdata->filelen += symtab->nsyms * symlen;
2554 }
2555
2556 /* Build the dysymtab. */
2557 if (dysymtab != NULL)
2558 if (!bfd_mach_o_build_dysymtab (abfd, dysymtab))
2559 return FALSE;
2560
2561 /* Write symtab and strtab. */
2562 if (symtab != NULL)
2563 if (!bfd_mach_o_write_symtab_content (abfd, symtab))
2564 return FALSE;
2565
2566 /* Adjust linkedit size. */
2567 if (linkedit != NULL)
2568 {
2569 /* bfd_vma pagemask = bfd_mach_o_get_backend_data (abfd)->page_size - 1; */
2570
2571 linkedit->vmsize = mdata->filelen - linkedit->fileoff;
2572 /* linkedit->vmsize = (linkedit->vmsize + pagemask) & ~pagemask; */
2573 linkedit->filesize = mdata->filelen - linkedit->fileoff;
2574
2575 linkedit->initprot = BFD_MACH_O_PROT_READ;
2576 linkedit->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
2577 | BFD_MACH_O_PROT_EXECUTE;
2578 }
2579
2580 /* Second pass: write commands. */
2581 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
2582 {
2583 struct mach_o_load_command_external raw;
2584 unsigned long typeflag;
2585
2586 typeflag = cmd->type | (cmd->type_required ? BFD_MACH_O_LC_REQ_DYLD : 0);
2587
2588 bfd_h_put_32 (abfd, typeflag, raw.cmd);
2589 bfd_h_put_32 (abfd, cmd->len, raw.cmdsize);
2590
2591 if (bfd_seek (abfd, cmd->offset, SEEK_SET) != 0
2592 || bfd_bwrite (&raw, BFD_MACH_O_LC_SIZE, abfd) != 8)
2593 return FALSE;
2594
2595 switch (cmd->type)
2596 {
2597 case BFD_MACH_O_LC_SEGMENT:
2598 if (!bfd_mach_o_write_segment_32 (abfd, cmd))
2599 return FALSE;
2600 break;
2601 case BFD_MACH_O_LC_SEGMENT_64:
2602 if (!bfd_mach_o_write_segment_64 (abfd, cmd))
2603 return FALSE;
2604 break;
2605 case BFD_MACH_O_LC_SYMTAB:
2606 if (!bfd_mach_o_write_symtab (abfd, cmd))
2607 return FALSE;
2608 break;
2609 case BFD_MACH_O_LC_DYSYMTAB:
2610 if (!bfd_mach_o_write_dysymtab (abfd, cmd))
2611 return FALSE;
2612 break;
2613 case BFD_MACH_O_LC_THREAD:
2614 case BFD_MACH_O_LC_UNIXTHREAD:
2615 if (!bfd_mach_o_write_thread (abfd, cmd))
2616 return FALSE;
2617 break;
2618 case BFD_MACH_O_LC_LOAD_DYLIB:
2619 if (!bfd_mach_o_write_dylib (abfd, cmd))
2620 return FALSE;
2621 break;
2622 case BFD_MACH_O_LC_LOAD_DYLINKER:
2623 if (!bfd_mach_o_write_dylinker (abfd, cmd))
2624 return FALSE;
2625 break;
2626 case BFD_MACH_O_LC_MAIN:
2627 if (!bfd_mach_o_write_main (abfd, cmd))
2628 return FALSE;
2629 break;
2630 case BFD_MACH_O_LC_DYLD_INFO:
2631 if (!bfd_mach_o_write_dyld_info (abfd, cmd))
2632 return FALSE;
2633 break;
2634 default:
2635 (*_bfd_error_handler)
2636 (_("unable to write unknown load command 0x%lx"),
2637 (unsigned long) cmd->type);
2638 return FALSE;
2639 }
2640 }
2641
2642 return TRUE;
2643 }
2644
2645 static void
bfd_mach_o_append_section_to_segment(bfd_mach_o_segment_command * seg,bfd_mach_o_section * s)2646 bfd_mach_o_append_section_to_segment (bfd_mach_o_segment_command *seg,
2647 bfd_mach_o_section *s)
2648 {
2649 if (seg->sect_head == NULL)
2650 seg->sect_head = s;
2651 else
2652 seg->sect_tail->next = s;
2653 seg->sect_tail = s;
2654 }
2655
2656 /* Create section Mach-O flags from BFD flags. */
2657
2658 static void
bfd_mach_o_set_section_flags_from_bfd(bfd * abfd ATTRIBUTE_UNUSED,asection * sec)2659 bfd_mach_o_set_section_flags_from_bfd (bfd *abfd ATTRIBUTE_UNUSED,
2660 asection *sec)
2661 {
2662 flagword bfd_flags;
2663 bfd_mach_o_section *s = bfd_mach_o_get_mach_o_section (sec);
2664
2665 /* Create default flags. */
2666 bfd_flags = bfd_get_section_flags (abfd, sec);
2667 if ((bfd_flags & SEC_CODE) == SEC_CODE)
2668 s->flags = BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS
2669 | BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS
2670 | BFD_MACH_O_S_REGULAR;
2671 else if ((bfd_flags & (SEC_ALLOC | SEC_LOAD)) == SEC_ALLOC)
2672 s->flags = BFD_MACH_O_S_ZEROFILL;
2673 else if (bfd_flags & SEC_DEBUGGING)
2674 s->flags = BFD_MACH_O_S_REGULAR | BFD_MACH_O_S_ATTR_DEBUG;
2675 else
2676 s->flags = BFD_MACH_O_S_REGULAR;
2677 }
2678
2679 static bfd_boolean
bfd_mach_o_build_obj_seg_command(bfd * abfd,bfd_mach_o_segment_command * seg)2680 bfd_mach_o_build_obj_seg_command (bfd *abfd, bfd_mach_o_segment_command *seg)
2681 {
2682 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2683 unsigned int i, j;
2684
2685 seg->vmaddr = 0;
2686 seg->fileoff = mdata->filelen;
2687 seg->initprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
2688 | BFD_MACH_O_PROT_EXECUTE;
2689 seg->maxprot = seg->initprot;
2690
2691 /* Append sections to the segment.
2692
2693 This is a little tedious, we have to honor the need to account zerofill
2694 sections after all the rest. This forces us to do the calculation of
2695 total vmsize in three passes so that any alignment increments are
2696 properly accounted. */
2697 for (i = 0; i < mdata->nsects; ++i)
2698 {
2699 bfd_mach_o_section *s = mdata->sections[i];
2700 asection *sec = s->bfdsection;
2701
2702 /* Although we account for zerofill section sizes in vm order, they are
2703 placed in the file in source sequence. */
2704 bfd_mach_o_append_section_to_segment (seg, s);
2705 s->offset = 0;
2706
2707 /* Zerofill sections have zero file size & offset, the only content
2708 written to the file is the symbols. */
2709 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) == BFD_MACH_O_S_ZEROFILL
2710 || ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2711 == BFD_MACH_O_S_GB_ZEROFILL))
2712 continue;
2713
2714 /* The Darwin system tools (in MH_OBJECT files, at least) always account
2715 sections, even those with zero size. */
2716 if (s->size > 0)
2717 {
2718 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2719 seg->vmsize += s->size;
2720
2721 /* MH_OBJECT files have unaligned content. */
2722 if (1)
2723 {
2724 seg->filesize = FILE_ALIGN (seg->filesize, s->align);
2725 mdata->filelen = FILE_ALIGN (mdata->filelen, s->align);
2726 }
2727 seg->filesize += s->size;
2728
2729 /* The system tools write even zero-sized sections with an offset
2730 field set to the current file position. */
2731 s->offset = mdata->filelen;
2732 }
2733
2734 sec->filepos = s->offset;
2735 mdata->filelen += s->size;
2736 }
2737
2738 /* Now pass through again, for zerofill, only now we just update the
2739 vmsize, and then for zerofill_GB. */
2740 for (j = 0; j < 2; j++)
2741 {
2742 unsigned int stype;
2743
2744 if (j == 0)
2745 stype = BFD_MACH_O_S_ZEROFILL;
2746 else
2747 stype = BFD_MACH_O_S_GB_ZEROFILL;
2748
2749 for (i = 0; i < mdata->nsects; ++i)
2750 {
2751 bfd_mach_o_section *s = mdata->sections[i];
2752
2753 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != stype)
2754 continue;
2755
2756 if (s->size > 0)
2757 {
2758 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2759 seg->vmsize += s->size;
2760 }
2761 }
2762 }
2763
2764 /* Allocate space for the relocations. */
2765 mdata->filelen = FILE_ALIGN (mdata->filelen, 2);
2766
2767 for (i = 0; i < mdata->nsects; ++i)
2768 {
2769 bfd_mach_o_section *ms = mdata->sections[i];
2770 asection *sec = ms->bfdsection;
2771
2772 ms->nreloc = sec->reloc_count;
2773 if (ms->nreloc == 0)
2774 {
2775 /* Clear nreloc and reloff if there is no relocs. */
2776 ms->reloff = 0;
2777 continue;
2778 }
2779 sec->rel_filepos = mdata->filelen;
2780 ms->reloff = sec->rel_filepos;
2781 mdata->filelen += sec->reloc_count * BFD_MACH_O_RELENT_SIZE;
2782 }
2783
2784 return TRUE;
2785 }
2786
2787 static bfd_boolean
bfd_mach_o_build_exec_seg_command(bfd * abfd,bfd_mach_o_segment_command * seg)2788 bfd_mach_o_build_exec_seg_command (bfd *abfd, bfd_mach_o_segment_command *seg)
2789 {
2790 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2791 unsigned int i;
2792 bfd_vma pagemask = bfd_mach_o_get_backend_data (abfd)->page_size - 1;
2793 bfd_vma vma;
2794 bfd_mach_o_section *s;
2795
2796 seg->vmsize = 0;
2797
2798 seg->fileoff = mdata->filelen;
2799 seg->maxprot = 0;
2800 seg->initprot = 0;
2801 seg->flags = 0;
2802
2803 /* Append sections to the segment. We assume they are properly ordered
2804 by vma (but we check that). */
2805 vma = 0;
2806 for (i = 0; i < mdata->nsects; ++i)
2807 {
2808 s = mdata->sections[i];
2809
2810 /* Consider only sections for this segment. */
2811 if (strcmp (seg->segname, s->segname) != 0)
2812 continue;
2813
2814 bfd_mach_o_append_section_to_segment (seg, s);
2815
2816 if (s->addr < vma)
2817 {
2818 (*_bfd_error_handler)
2819 (_("section address (%lx) below start of segment (%lx)"),
2820 (unsigned long) s->addr, (unsigned long) vma);
2821 return FALSE;
2822 }
2823
2824 vma = s->addr + s->size;
2825 }
2826
2827 /* Set segment file offset: make it page aligned. */
2828 vma = seg->sect_head->addr;
2829 seg->vmaddr = vma & ~pagemask;
2830 if ((mdata->filelen & pagemask) > (vma & pagemask))
2831 mdata->filelen += pagemask + 1;
2832 seg->fileoff = mdata->filelen & ~pagemask;
2833 mdata->filelen = seg->fileoff + (vma & pagemask);
2834
2835 /* Set section file offset. */
2836 for (s = seg->sect_head; s != NULL; s = s->next)
2837 {
2838 asection *sec = s->bfdsection;
2839 flagword flags = bfd_get_section_flags (abfd, sec);
2840
2841 /* Adjust segment size. */
2842 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2843 seg->vmsize += s->size;
2844
2845 /* File offset and length. */
2846 seg->filesize = FILE_ALIGN (seg->filesize, s->align);
2847
2848 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != BFD_MACH_O_S_ZEROFILL
2849 && ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2850 != BFD_MACH_O_S_GB_ZEROFILL))
2851 {
2852 mdata->filelen = FILE_ALIGN (mdata->filelen, s->align);
2853
2854 s->offset = mdata->filelen;
2855 s->bfdsection->filepos = s->offset;
2856
2857 seg->filesize += s->size;
2858 mdata->filelen += s->size;
2859 }
2860 else
2861 {
2862 s->offset = 0;
2863 s->bfdsection->filepos = 0;
2864 }
2865
2866 /* Set protection. */
2867 if (flags & SEC_LOAD)
2868 {
2869 if (flags & SEC_CODE)
2870 seg->initprot |= BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_EXECUTE;
2871 if ((flags & (SEC_DATA | SEC_READONLY)) == SEC_DATA)
2872 seg->initprot |= BFD_MACH_O_PROT_WRITE | BFD_MACH_O_PROT_READ;
2873 }
2874
2875 /* Relocs shouldn't appear in non-object files. */
2876 if (s->bfdsection->reloc_count != 0)
2877 return FALSE;
2878 }
2879
2880 /* Set maxprot. */
2881 if (seg->initprot != 0)
2882 seg->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
2883 | BFD_MACH_O_PROT_EXECUTE;
2884 else
2885 seg->maxprot = 0;
2886
2887 /* Round segment size (and file size). */
2888 seg->vmsize = (seg->vmsize + pagemask) & ~pagemask;
2889 seg->filesize = (seg->filesize + pagemask) & ~pagemask;
2890 mdata->filelen = (mdata->filelen + pagemask) & ~pagemask;
2891
2892 return TRUE;
2893 }
2894
2895 /* Layout the commands: set commands size and offset, set ncmds and sizeofcmds
2896 fields in header. */
2897
2898 static bfd_boolean
bfd_mach_o_layout_commands(bfd_mach_o_data_struct * mdata)2899 bfd_mach_o_layout_commands (bfd_mach_o_data_struct *mdata)
2900 {
2901 unsigned wide = mach_o_wide_p (&mdata->header);
2902 unsigned int hdrlen;
2903 ufile_ptr offset;
2904 bfd_mach_o_load_command *cmd;
2905 unsigned int align;
2906 bfd_boolean ret = TRUE;
2907
2908 hdrlen = wide ? BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
2909 align = wide ? 8 - 1 : 4 - 1;
2910 offset = hdrlen;
2911 mdata->header.ncmds = 0;
2912
2913 for (cmd = mdata->first_command; cmd; cmd = cmd->next)
2914 {
2915 mdata->header.ncmds++;
2916 cmd->offset = offset;
2917
2918 switch (cmd->type)
2919 {
2920 case BFD_MACH_O_LC_SEGMENT_64:
2921 cmd->len = BFD_MACH_O_LC_SEGMENT_64_SIZE
2922 + BFD_MACH_O_SECTION_64_SIZE * cmd->command.segment.nsects;
2923 break;
2924 case BFD_MACH_O_LC_SEGMENT:
2925 cmd->len = BFD_MACH_O_LC_SEGMENT_SIZE
2926 + BFD_MACH_O_SECTION_SIZE * cmd->command.segment.nsects;
2927 break;
2928 case BFD_MACH_O_LC_SYMTAB:
2929 cmd->len = sizeof (struct mach_o_symtab_command_external)
2930 + BFD_MACH_O_LC_SIZE;
2931 break;
2932 case BFD_MACH_O_LC_DYSYMTAB:
2933 cmd->len = sizeof (struct mach_o_dysymtab_command_external)
2934 + BFD_MACH_O_LC_SIZE;
2935 break;
2936 case BFD_MACH_O_LC_LOAD_DYLIB:
2937 cmd->len = sizeof (struct mach_o_dylib_command_external)
2938 + BFD_MACH_O_LC_SIZE;
2939 cmd->command.dylib.name_offset = cmd->len;
2940 cmd->len += strlen (cmd->command.dylib.name_str);
2941 cmd->len = (cmd->len + align) & ~align;
2942 break;
2943 case BFD_MACH_O_LC_LOAD_DYLINKER:
2944 cmd->len = sizeof (struct mach_o_str_command_external)
2945 + BFD_MACH_O_LC_SIZE;
2946 cmd->command.dylinker.name_offset = cmd->len;
2947 cmd->len += strlen (cmd->command.dylinker.name_str);
2948 cmd->len = (cmd->len + align) & ~align;
2949 break;
2950 case BFD_MACH_O_LC_MAIN:
2951 cmd->len = sizeof (struct mach_o_entry_point_command_external)
2952 + BFD_MACH_O_LC_SIZE;
2953 break;
2954 case BFD_MACH_O_LC_DYLD_INFO:
2955 cmd->len = sizeof (struct mach_o_dyld_info_command_external)
2956 + BFD_MACH_O_LC_SIZE;
2957 break;
2958 default:
2959 (*_bfd_error_handler)
2960 (_("unable to layout unknown load command 0x%lx"),
2961 (unsigned long) cmd->type);
2962 ret = FALSE;
2963 break;
2964 }
2965
2966 BFD_ASSERT (cmd->len % (align + 1) == 0);
2967 offset += cmd->len;
2968 }
2969 mdata->header.sizeofcmds = offset - hdrlen;
2970 mdata->filelen = offset;
2971
2972 return ret;
2973 }
2974
2975 /* Subroutine of bfd_mach_o_build_commands: set type, name and nsects of a
2976 segment. */
2977
2978 static void
bfd_mach_o_init_segment(bfd_mach_o_data_struct * mdata,bfd_mach_o_load_command * cmd,const char * segname,unsigned int nbr_sect)2979 bfd_mach_o_init_segment (bfd_mach_o_data_struct *mdata,
2980 bfd_mach_o_load_command *cmd,
2981 const char *segname, unsigned int nbr_sect)
2982 {
2983 bfd_mach_o_segment_command *seg = &cmd->command.segment;
2984 unsigned wide = mach_o_wide_p (&mdata->header);
2985
2986 /* Init segment command. */
2987 cmd->type = wide ? BFD_MACH_O_LC_SEGMENT_64 : BFD_MACH_O_LC_SEGMENT;
2988 cmd->type_required = FALSE;
2989
2990 strcpy (seg->segname, segname);
2991 seg->nsects = nbr_sect;
2992
2993 seg->vmaddr = 0;
2994 seg->vmsize = 0;
2995
2996 seg->fileoff = 0;
2997 seg->filesize = 0;
2998 seg->maxprot = 0;
2999 seg->initprot = 0;
3000 seg->flags = 0;
3001 seg->sect_head = NULL;
3002 seg->sect_tail = NULL;
3003 }
3004
3005 /* Build Mach-O load commands (currently assuming an MH_OBJECT file).
3006 TODO: Other file formats, rebuilding symtab/dysymtab commands for strip
3007 and copy functionality. */
3008
3009 bfd_boolean
bfd_mach_o_build_commands(bfd * abfd)3010 bfd_mach_o_build_commands (bfd *abfd)
3011 {
3012 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3013 unsigned wide = mach_o_wide_p (&mdata->header);
3014 unsigned int nbr_segcmd = 0;
3015 bfd_mach_o_load_command *commands;
3016 unsigned int nbr_commands;
3017 int symtab_idx = -1;
3018 int dysymtab_idx = -1;
3019 int main_idx = -1;
3020 unsigned int i;
3021
3022 /* Return now if already built. */
3023 if (mdata->header.ncmds != 0)
3024 return TRUE;
3025
3026 /* Fill in the file type, if not already set. */
3027 if (mdata->header.filetype == 0)
3028 {
3029 if (abfd->flags & EXEC_P)
3030 mdata->header.filetype = BFD_MACH_O_MH_EXECUTE;
3031 else if (abfd->flags & DYNAMIC)
3032 mdata->header.filetype = BFD_MACH_O_MH_DYLIB;
3033 else
3034 mdata->header.filetype = BFD_MACH_O_MH_OBJECT;
3035 }
3036
3037 /* If hasn't already been done, flatten sections list, and sort
3038 if/when required. Must be done before the symbol table is adjusted,
3039 since that depends on properly numbered sections. */
3040 if (mdata->nsects == 0 || mdata->sections == NULL)
3041 if (! bfd_mach_o_mangle_sections (abfd, mdata))
3042 return FALSE;
3043
3044 /* Order the symbol table, fill-in/check mach-o specific fields and
3045 partition out any indirect symbols. */
3046 if (!bfd_mach_o_mangle_symbols (abfd))
3047 return FALSE;
3048
3049 /* Segment commands. */
3050 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT)
3051 {
3052 /* Only one segment for all the sections. But the segment is
3053 optional if there is no sections. */
3054 nbr_segcmd = (mdata->nsects > 0) ? 1 : 0;
3055 }
3056 else
3057 {
3058 bfd_mach_o_section *prev_sect = NULL;
3059
3060 /* One pagezero segment and one linkedit segment. */
3061 nbr_segcmd = 2;
3062
3063 /* Create one segment for associated segment name in sections.
3064 Assume that sections with the same segment name are consecutive. */
3065 for (i = 0; i < mdata->nsects; i++)
3066 {
3067 bfd_mach_o_section *this_sect = mdata->sections[i];
3068
3069 if (prev_sect == NULL
3070 || strcmp (prev_sect->segname, this_sect->segname) != 0)
3071 {
3072 nbr_segcmd++;
3073 prev_sect = this_sect;
3074 }
3075 }
3076 }
3077
3078 nbr_commands = nbr_segcmd;
3079
3080 /* One command for the symbol table (only if there are symbols. */
3081 if (bfd_get_symcount (abfd) > 0)
3082 symtab_idx = nbr_commands++;
3083
3084 /* FIXME:
3085 This is a rather crude test for whether we should build a dysymtab. */
3086 if (bfd_mach_o_should_emit_dysymtab ()
3087 && bfd_get_symcount (abfd))
3088 {
3089 /* If there should be a case where a dysymtab could be emitted without
3090 a symtab (seems improbable), this would need amending. */
3091 dysymtab_idx = nbr_commands++;
3092 }
3093
3094 /* Add an entry point command. */
3095 if (mdata->header.filetype == BFD_MACH_O_MH_EXECUTE
3096 && bfd_get_start_address (abfd) != 0)
3097 main_idx = nbr_commands++;
3098
3099 /* Well, we must have a header, at least. */
3100 mdata->filelen = wide ? BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
3101
3102 /* A bit unusual, but no content is valid;
3103 as -n empty.s -o empty.o */
3104 if (nbr_commands == 0)
3105 {
3106 /* Layout commands (well none...) and set headers command fields. */
3107 return bfd_mach_o_layout_commands (mdata);
3108 }
3109
3110 /* Create commands for segments (and symtabs), prepend them. */
3111 commands = bfd_zalloc (abfd, nbr_commands * sizeof (bfd_mach_o_load_command));
3112 if (commands == NULL)
3113 return FALSE;
3114 for (i = 0; i < nbr_commands - 1; i++)
3115 commands[i].next = &commands[i + 1];
3116 commands[nbr_commands - 1].next = mdata->first_command;
3117 if (mdata->first_command == NULL)
3118 mdata->last_command = &commands[nbr_commands - 1];
3119 mdata->first_command = &commands[0];
3120
3121 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT && nbr_segcmd != 0)
3122 {
3123 /* For object file, there is only one segment. */
3124 bfd_mach_o_init_segment (mdata, &commands[0], "", mdata->nsects);
3125 }
3126 else if (nbr_segcmd != 0)
3127 {
3128 bfd_mach_o_load_command *cmd;
3129
3130 BFD_ASSERT (nbr_segcmd >= 2);
3131
3132 /* The pagezero. */
3133 cmd = &commands[0];
3134 bfd_mach_o_init_segment (mdata, cmd, "__PAGEZERO", 0);
3135
3136 /* Segments from sections. */
3137 cmd++;
3138 for (i = 0; i < mdata->nsects;)
3139 {
3140 const char *segname = mdata->sections[i]->segname;
3141 unsigned int nbr_sect = 1;
3142
3143 /* Count number of sections for this segment. */
3144 for (i++; i < mdata->nsects; i++)
3145 if (strcmp (mdata->sections[i]->segname, segname) == 0)
3146 nbr_sect++;
3147 else
3148 break;
3149
3150 bfd_mach_o_init_segment (mdata, cmd, segname, nbr_sect);
3151 cmd++;
3152 }
3153
3154 /* The linkedit. */
3155 bfd_mach_o_init_segment (mdata, cmd, "__LINKEDIT", 0);
3156 }
3157
3158 if (symtab_idx >= 0)
3159 {
3160 /* Init symtab command. */
3161 bfd_mach_o_load_command *cmd = &commands[symtab_idx];
3162
3163 cmd->type = BFD_MACH_O_LC_SYMTAB;
3164 cmd->type_required = FALSE;
3165 }
3166
3167 /* If required, setup symtab command, see comment above about the quality
3168 of this test. */
3169 if (dysymtab_idx >= 0)
3170 {
3171 bfd_mach_o_load_command *cmd = &commands[dysymtab_idx];
3172
3173 cmd->type = BFD_MACH_O_LC_DYSYMTAB;
3174 cmd->type_required = FALSE;
3175 }
3176
3177 /* Create the main command. */
3178 if (main_idx >= 0)
3179 {
3180 bfd_mach_o_load_command *cmd = &commands[main_idx];
3181
3182 cmd->type = BFD_MACH_O_LC_MAIN;
3183 cmd->type_required = TRUE;
3184
3185 cmd->command.main.entryoff = 0;
3186 cmd->command.main.stacksize = 0;
3187 }
3188
3189 /* Layout commands. */
3190 if (! bfd_mach_o_layout_commands (mdata))
3191 return FALSE;
3192
3193 /* So, now we have sized the commands and the filelen set to that.
3194 Now we can build the segment command and set the section file offsets. */
3195 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT)
3196 {
3197 for (i = 0; i < nbr_segcmd; i++)
3198 if (!bfd_mach_o_build_obj_seg_command
3199 (abfd, &commands[i].command.segment))
3200 return FALSE;
3201 }
3202 else
3203 {
3204 bfd_vma maxvma = 0;
3205
3206 /* Skip pagezero and linkedit segments. */
3207 for (i = 1; i < nbr_segcmd - 1; i++)
3208 {
3209 bfd_mach_o_segment_command *seg = &commands[i].command.segment;
3210
3211 if (!bfd_mach_o_build_exec_seg_command (abfd, seg))
3212 return FALSE;
3213
3214 if (seg->vmaddr + seg->vmsize > maxvma)
3215 maxvma = seg->vmaddr + seg->vmsize;
3216 }
3217
3218 /* Set the size of __PAGEZERO. */
3219 commands[0].command.segment.vmsize =
3220 commands[1].command.segment.vmaddr;
3221
3222 /* Set the vma and fileoff of __LINKEDIT. */
3223 commands[nbr_segcmd - 1].command.segment.vmaddr = maxvma;
3224 commands[nbr_segcmd - 1].command.segment.fileoff = mdata->filelen;
3225
3226 /* Set entry point (once segments have been laid out). */
3227 if (main_idx >= 0)
3228 commands[main_idx].command.main.entryoff =
3229 bfd_get_start_address (abfd) - commands[1].command.segment.vmaddr;
3230 }
3231
3232 return TRUE;
3233 }
3234
3235 /* Set the contents of a section. */
3236
3237 bfd_boolean
bfd_mach_o_set_section_contents(bfd * abfd,asection * section,const void * location,file_ptr offset,bfd_size_type count)3238 bfd_mach_o_set_section_contents (bfd *abfd,
3239 asection *section,
3240 const void * location,
3241 file_ptr offset,
3242 bfd_size_type count)
3243 {
3244 file_ptr pos;
3245
3246 /* Trying to write the first section contents will trigger the creation of
3247 the load commands if they are not already present. */
3248 if (!abfd->output_has_begun && !bfd_mach_o_build_commands (abfd))
3249 return FALSE;
3250
3251 if (count == 0)
3252 return TRUE;
3253
3254 pos = section->filepos + offset;
3255 if (bfd_seek (abfd, pos, SEEK_SET) != 0
3256 || bfd_bwrite (location, count, abfd) != count)
3257 return FALSE;
3258
3259 return TRUE;
3260 }
3261
3262 int
bfd_mach_o_sizeof_headers(bfd * a ATTRIBUTE_UNUSED,struct bfd_link_info * info ATTRIBUTE_UNUSED)3263 bfd_mach_o_sizeof_headers (bfd *a ATTRIBUTE_UNUSED,
3264 struct bfd_link_info *info ATTRIBUTE_UNUSED)
3265 {
3266 return 0;
3267 }
3268
3269 /* Make an empty symbol. This is required only because
3270 bfd_make_section_anyway wants to create a symbol for the section. */
3271
3272 asymbol *
bfd_mach_o_make_empty_symbol(bfd * abfd)3273 bfd_mach_o_make_empty_symbol (bfd *abfd)
3274 {
3275 asymbol *new_symbol;
3276
3277 new_symbol = bfd_zalloc (abfd, sizeof (bfd_mach_o_asymbol));
3278 if (new_symbol == NULL)
3279 return new_symbol;
3280 new_symbol->the_bfd = abfd;
3281 new_symbol->udata.i = SYM_MACHO_FIELDS_UNSET;
3282 return new_symbol;
3283 }
3284
3285 static bfd_boolean
bfd_mach_o_read_header(bfd * abfd,file_ptr hdr_off,bfd_mach_o_header * header)3286 bfd_mach_o_read_header (bfd *abfd, file_ptr hdr_off, bfd_mach_o_header *header)
3287 {
3288 struct mach_o_header_external raw;
3289 unsigned int size;
3290 bfd_vma (*get32) (const void *) = NULL;
3291
3292 /* Just read the magic number. */
3293 if (bfd_seek (abfd, hdr_off, SEEK_SET) != 0
3294 || bfd_bread (raw.magic, sizeof (raw.magic), abfd) != 4)
3295 return FALSE;
3296
3297 if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC)
3298 {
3299 header->byteorder = BFD_ENDIAN_BIG;
3300 header->magic = BFD_MACH_O_MH_MAGIC;
3301 header->version = 1;
3302 get32 = bfd_getb32;
3303 }
3304 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC)
3305 {
3306 header->byteorder = BFD_ENDIAN_LITTLE;
3307 header->magic = BFD_MACH_O_MH_MAGIC;
3308 header->version = 1;
3309 get32 = bfd_getl32;
3310 }
3311 else if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64)
3312 {
3313 header->byteorder = BFD_ENDIAN_BIG;
3314 header->magic = BFD_MACH_O_MH_MAGIC_64;
3315 header->version = 2;
3316 get32 = bfd_getb32;
3317 }
3318 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64)
3319 {
3320 header->byteorder = BFD_ENDIAN_LITTLE;
3321 header->magic = BFD_MACH_O_MH_MAGIC_64;
3322 header->version = 2;
3323 get32 = bfd_getl32;
3324 }
3325 else
3326 {
3327 header->byteorder = BFD_ENDIAN_UNKNOWN;
3328 return FALSE;
3329 }
3330
3331 /* Once the size of the header is known, read the full header. */
3332 size = mach_o_wide_p (header) ?
3333 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
3334
3335 if (bfd_seek (abfd, hdr_off, SEEK_SET) != 0
3336 || bfd_bread (&raw, size, abfd) != size)
3337 return FALSE;
3338
3339 header->cputype = (*get32) (raw.cputype);
3340 header->cpusubtype = (*get32) (raw.cpusubtype);
3341 header->filetype = (*get32) (raw.filetype);
3342 header->ncmds = (*get32) (raw.ncmds);
3343 header->sizeofcmds = (*get32) (raw.sizeofcmds);
3344 header->flags = (*get32) (raw.flags);
3345
3346 if (mach_o_wide_p (header))
3347 header->reserved = (*get32) (raw.reserved);
3348 else
3349 header->reserved = 0;
3350
3351 return TRUE;
3352 }
3353
3354 bfd_boolean
bfd_mach_o_new_section_hook(bfd * abfd,asection * sec)3355 bfd_mach_o_new_section_hook (bfd *abfd, asection *sec)
3356 {
3357 bfd_mach_o_section *s;
3358 unsigned bfdalign = bfd_get_section_alignment (abfd, sec);
3359
3360 s = bfd_mach_o_get_mach_o_section (sec);
3361 if (s == NULL)
3362 {
3363 flagword bfd_flags;
3364 static const mach_o_section_name_xlat * xlat;
3365
3366 s = (bfd_mach_o_section *) bfd_zalloc (abfd, sizeof (*s));
3367 if (s == NULL)
3368 return FALSE;
3369 sec->used_by_bfd = s;
3370 s->bfdsection = sec;
3371
3372 /* Create the Darwin seg/sect name pair from the bfd name.
3373 If this is a canonical name for which a specific paiting exists
3374 there will also be defined flags, type, attribute and alignment
3375 values. */
3376 xlat = bfd_mach_o_convert_section_name_to_mach_o (abfd, sec, s);
3377 if (xlat != NULL)
3378 {
3379 s->flags = xlat->macho_sectype | xlat->macho_secattr;
3380 s->align = xlat->sectalign > bfdalign ? xlat->sectalign
3381 : bfdalign;
3382 (void) bfd_set_section_alignment (abfd, sec, s->align);
3383 bfd_flags = bfd_get_section_flags (abfd, sec);
3384 if (bfd_flags == SEC_NO_FLAGS)
3385 bfd_set_section_flags (abfd, sec, xlat->bfd_flags);
3386 }
3387 else
3388 /* Create default flags. */
3389 bfd_mach_o_set_section_flags_from_bfd (abfd, sec);
3390 }
3391
3392 return _bfd_generic_new_section_hook (abfd, sec);
3393 }
3394
3395 static void
bfd_mach_o_init_section_from_mach_o(bfd * abfd,asection * sec,unsigned long prot)3396 bfd_mach_o_init_section_from_mach_o (bfd *abfd, asection *sec,
3397 unsigned long prot)
3398 {
3399 flagword flags;
3400 bfd_mach_o_section *section;
3401
3402 flags = bfd_get_section_flags (abfd, sec);
3403 section = bfd_mach_o_get_mach_o_section (sec);
3404
3405 /* TODO: see if we should use the xlat system for doing this by
3406 preference and fall back to this for unknown sections. */
3407
3408 if (flags == SEC_NO_FLAGS)
3409 {
3410 /* Try to guess flags. */
3411 if (section->flags & BFD_MACH_O_S_ATTR_DEBUG)
3412 flags = SEC_DEBUGGING;
3413 else
3414 {
3415 flags = SEC_ALLOC;
3416 if ((section->flags & BFD_MACH_O_SECTION_TYPE_MASK)
3417 != BFD_MACH_O_S_ZEROFILL)
3418 {
3419 flags |= SEC_LOAD;
3420 if (prot & BFD_MACH_O_PROT_EXECUTE)
3421 flags |= SEC_CODE;
3422 if (prot & BFD_MACH_O_PROT_WRITE)
3423 flags |= SEC_DATA;
3424 else if (prot & BFD_MACH_O_PROT_READ)
3425 flags |= SEC_READONLY;
3426 }
3427 }
3428 }
3429 else
3430 {
3431 if ((flags & SEC_DEBUGGING) == 0)
3432 flags |= SEC_ALLOC;
3433 }
3434
3435 if (section->offset != 0)
3436 flags |= SEC_HAS_CONTENTS;
3437 if (section->nreloc != 0)
3438 flags |= SEC_RELOC;
3439
3440 bfd_set_section_flags (abfd, sec, flags);
3441
3442 sec->vma = section->addr;
3443 sec->lma = section->addr;
3444 sec->size = section->size;
3445 sec->filepos = section->offset;
3446 sec->alignment_power = section->align;
3447 sec->segment_mark = 0;
3448 sec->reloc_count = section->nreloc;
3449 sec->rel_filepos = section->reloff;
3450 }
3451
3452 static asection *
bfd_mach_o_make_bfd_section(bfd * abfd,const unsigned char * segname,const unsigned char * sectname)3453 bfd_mach_o_make_bfd_section (bfd *abfd,
3454 const unsigned char *segname,
3455 const unsigned char *sectname)
3456 {
3457 const char *sname;
3458 flagword flags;
3459
3460 bfd_mach_o_convert_section_name_to_bfd
3461 (abfd, (const char *)segname, (const char *)sectname, &sname, &flags);
3462 if (sname == NULL)
3463 return NULL;
3464
3465 return bfd_make_section_anyway_with_flags (abfd, sname, flags);
3466 }
3467
3468 static asection *
bfd_mach_o_read_section_32(bfd * abfd,unsigned long prot)3469 bfd_mach_o_read_section_32 (bfd *abfd, unsigned long prot)
3470 {
3471 struct mach_o_section_32_external raw;
3472 asection *sec;
3473 bfd_mach_o_section *section;
3474
3475 if (bfd_bread (&raw, BFD_MACH_O_SECTION_SIZE, abfd)
3476 != BFD_MACH_O_SECTION_SIZE)
3477 return NULL;
3478
3479 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname);
3480 if (sec == NULL)
3481 return NULL;
3482
3483 section = bfd_mach_o_get_mach_o_section (sec);
3484 memcpy (section->segname, raw.segname, sizeof (raw.segname));
3485 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0;
3486 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname));
3487 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0;
3488 section->addr = bfd_h_get_32 (abfd, raw.addr);
3489 section->size = bfd_h_get_32 (abfd, raw.size);
3490 section->offset = bfd_h_get_32 (abfd, raw.offset);
3491 section->align = bfd_h_get_32 (abfd, raw.align);
3492 /* PR 17512: file: 0017eb76. */
3493 if (section->align > 64)
3494 {
3495 (*_bfd_error_handler) (_("bfd_mach_o_read_section_32: overlarge alignment value: 0x%x, using 32 instead"),
3496 section->align);
3497 section->align = 32;
3498 }
3499 section->reloff = bfd_h_get_32 (abfd, raw.reloff);
3500 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc);
3501 section->flags = bfd_h_get_32 (abfd, raw.flags);
3502 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1);
3503 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2);
3504 section->reserved3 = 0;
3505
3506 bfd_mach_o_init_section_from_mach_o (abfd, sec, prot);
3507
3508 return sec;
3509 }
3510
3511 static asection *
bfd_mach_o_read_section_64(bfd * abfd,unsigned long prot)3512 bfd_mach_o_read_section_64 (bfd *abfd, unsigned long prot)
3513 {
3514 struct mach_o_section_64_external raw;
3515 asection *sec;
3516 bfd_mach_o_section *section;
3517
3518 if (bfd_bread (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd)
3519 != BFD_MACH_O_SECTION_64_SIZE)
3520 return NULL;
3521
3522 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname);
3523 if (sec == NULL)
3524 return NULL;
3525
3526 section = bfd_mach_o_get_mach_o_section (sec);
3527 memcpy (section->segname, raw.segname, sizeof (raw.segname));
3528 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0;
3529 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname));
3530 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0;
3531 section->addr = bfd_h_get_64 (abfd, raw.addr);
3532 section->size = bfd_h_get_64 (abfd, raw.size);
3533 section->offset = bfd_h_get_32 (abfd, raw.offset);
3534 section->align = bfd_h_get_32 (abfd, raw.align);
3535 if (section->align > 64)
3536 {
3537 (*_bfd_error_handler) (_("bfd_mach_o_read_section_64: overlarge alignment value: 0x%x, using 32 instead"),
3538 section->align);
3539 section->align = 32;
3540 }
3541 section->reloff = bfd_h_get_32 (abfd, raw.reloff);
3542 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc);
3543 section->flags = bfd_h_get_32 (abfd, raw.flags);
3544 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1);
3545 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2);
3546 section->reserved3 = bfd_h_get_32 (abfd, raw.reserved3);
3547
3548 bfd_mach_o_init_section_from_mach_o (abfd, sec, prot);
3549
3550 return sec;
3551 }
3552
3553 static asection *
bfd_mach_o_read_section(bfd * abfd,unsigned long prot,unsigned int wide)3554 bfd_mach_o_read_section (bfd *abfd, unsigned long prot, unsigned int wide)
3555 {
3556 if (wide)
3557 return bfd_mach_o_read_section_64 (abfd, prot);
3558 else
3559 return bfd_mach_o_read_section_32 (abfd, prot);
3560 }
3561
3562 static bfd_boolean
bfd_mach_o_read_symtab_symbol(bfd * abfd,bfd_mach_o_symtab_command * sym,bfd_mach_o_asymbol * s,unsigned long i)3563 bfd_mach_o_read_symtab_symbol (bfd *abfd,
3564 bfd_mach_o_symtab_command *sym,
3565 bfd_mach_o_asymbol *s,
3566 unsigned long i)
3567 {
3568 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3569 unsigned int wide = mach_o_wide_p (&mdata->header);
3570 unsigned int symwidth =
3571 wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE;
3572 unsigned int symoff = sym->symoff + (i * symwidth);
3573 struct mach_o_nlist_64_external raw;
3574 unsigned char type = -1;
3575 unsigned char section = -1;
3576 short desc = -1;
3577 symvalue value = -1;
3578 unsigned long stroff = -1;
3579 unsigned int symtype = -1;
3580
3581 BFD_ASSERT (sym->strtab != NULL);
3582
3583 if (bfd_seek (abfd, symoff, SEEK_SET) != 0
3584 || bfd_bread (&raw, symwidth, abfd) != symwidth)
3585 {
3586 (*_bfd_error_handler)
3587 (_("bfd_mach_o_read_symtab_symbol: unable to read %d bytes at %lu"),
3588 symwidth, (unsigned long) symoff);
3589 return FALSE;
3590 }
3591
3592 stroff = bfd_h_get_32 (abfd, raw.n_strx);
3593 type = bfd_h_get_8 (abfd, raw.n_type);
3594 symtype = type & BFD_MACH_O_N_TYPE;
3595 section = bfd_h_get_8 (abfd, raw.n_sect);
3596 desc = bfd_h_get_16 (abfd, raw.n_desc);
3597 if (wide)
3598 value = bfd_h_get_64 (abfd, raw.n_value);
3599 else
3600 value = bfd_h_get_32 (abfd, raw.n_value);
3601
3602 if (stroff >= sym->strsize)
3603 {
3604 (*_bfd_error_handler)
3605 (_("bfd_mach_o_read_symtab_symbol: name out of range (%lu >= %lu)"),
3606 (unsigned long) stroff,
3607 (unsigned long) sym->strsize);
3608 return FALSE;
3609 }
3610
3611 s->symbol.the_bfd = abfd;
3612 s->symbol.name = sym->strtab + stroff;
3613 s->symbol.value = value;
3614 s->symbol.flags = 0x0;
3615 s->symbol.udata.i = i;
3616 s->n_type = type;
3617 s->n_sect = section;
3618 s->n_desc = desc;
3619
3620 if (type & BFD_MACH_O_N_STAB)
3621 {
3622 s->symbol.flags |= BSF_DEBUGGING;
3623 s->symbol.section = bfd_und_section_ptr;
3624 switch (type)
3625 {
3626 case N_FUN:
3627 case N_STSYM:
3628 case N_LCSYM:
3629 case N_BNSYM:
3630 case N_SLINE:
3631 case N_ENSYM:
3632 case N_ECOMM:
3633 case N_ECOML:
3634 case N_GSYM:
3635 if ((section > 0) && (section <= mdata->nsects))
3636 {
3637 s->symbol.section = mdata->sections[section - 1]->bfdsection;
3638 s->symbol.value =
3639 s->symbol.value - mdata->sections[section - 1]->addr;
3640 }
3641 break;
3642 }
3643 }
3644 else
3645 {
3646 if (type & (BFD_MACH_O_N_PEXT | BFD_MACH_O_N_EXT))
3647 s->symbol.flags |= BSF_GLOBAL;
3648 else
3649 s->symbol.flags |= BSF_LOCAL;
3650
3651 switch (symtype)
3652 {
3653 case BFD_MACH_O_N_UNDF:
3654 if (type == (BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT)
3655 && s->symbol.value != 0)
3656 {
3657 /* A common symbol. */
3658 s->symbol.section = bfd_com_section_ptr;
3659 s->symbol.flags = BSF_NO_FLAGS;
3660 }
3661 else
3662 {
3663 s->symbol.section = bfd_und_section_ptr;
3664 if (s->n_desc & BFD_MACH_O_N_WEAK_REF)
3665 s->symbol.flags |= BSF_WEAK;
3666 }
3667 break;
3668 case BFD_MACH_O_N_PBUD:
3669 s->symbol.section = bfd_und_section_ptr;
3670 break;
3671 case BFD_MACH_O_N_ABS:
3672 s->symbol.section = bfd_abs_section_ptr;
3673 break;
3674 case BFD_MACH_O_N_SECT:
3675 if ((section > 0) && (section <= mdata->nsects))
3676 {
3677 s->symbol.section = mdata->sections[section - 1]->bfdsection;
3678 s->symbol.value =
3679 s->symbol.value - mdata->sections[section - 1]->addr;
3680 }
3681 else
3682 {
3683 /* Mach-O uses 0 to mean "no section"; not an error. */
3684 if (section != 0)
3685 {
3686 (*_bfd_error_handler) (_("bfd_mach_o_read_symtab_symbol: "
3687 "symbol \"%s\" specified invalid section %d (max %lu): setting to undefined"),
3688 s->symbol.name, section, mdata->nsects);
3689 }
3690 s->symbol.section = bfd_und_section_ptr;
3691 }
3692 break;
3693 case BFD_MACH_O_N_INDR:
3694 /* FIXME: we don't follow the BFD convention as this indirect symbol
3695 won't be followed by the referenced one. This looks harmless
3696 unless we start using the linker. */
3697 s->symbol.flags |= BSF_INDIRECT;
3698 s->symbol.section = bfd_ind_section_ptr;
3699 s->symbol.value = 0;
3700 break;
3701 default:
3702 (*_bfd_error_handler) (_("bfd_mach_o_read_symtab_symbol: "
3703 "symbol \"%s\" specified invalid type field 0x%x: setting to undefined"),
3704 s->symbol.name, symtype);
3705 s->symbol.section = bfd_und_section_ptr;
3706 break;
3707 }
3708 }
3709
3710 return TRUE;
3711 }
3712
3713 bfd_boolean
bfd_mach_o_read_symtab_strtab(bfd * abfd)3714 bfd_mach_o_read_symtab_strtab (bfd *abfd)
3715 {
3716 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3717 bfd_mach_o_symtab_command *sym = mdata->symtab;
3718
3719 /* Fail if there is no symtab. */
3720 if (sym == NULL)
3721 return FALSE;
3722
3723 /* Success if already loaded. */
3724 if (sym->strtab)
3725 return TRUE;
3726
3727 if (abfd->flags & BFD_IN_MEMORY)
3728 {
3729 struct bfd_in_memory *b;
3730
3731 b = (struct bfd_in_memory *) abfd->iostream;
3732
3733 if ((sym->stroff + sym->strsize) > b->size)
3734 {
3735 bfd_set_error (bfd_error_file_truncated);
3736 return FALSE;
3737 }
3738 sym->strtab = (char *) b->buffer + sym->stroff;
3739 }
3740 else
3741 {
3742 sym->strtab = bfd_alloc (abfd, sym->strsize + 1);
3743 if (sym->strtab == NULL)
3744 return FALSE;
3745
3746 if (bfd_seek (abfd, sym->stroff, SEEK_SET) != 0
3747 || bfd_bread (sym->strtab, sym->strsize, abfd) != sym->strsize)
3748 {
3749 /* PR 17512: file: 10888-1609-0.004. */
3750 bfd_release (abfd, sym->strtab);
3751 sym->strtab = NULL;
3752 bfd_set_error (bfd_error_file_truncated);
3753 return FALSE;
3754 }
3755 /* Zero terminate the string table. */
3756 sym->strtab[sym->strsize] = 0;
3757 }
3758
3759 return TRUE;
3760 }
3761
3762 bfd_boolean
bfd_mach_o_read_symtab_symbols(bfd * abfd)3763 bfd_mach_o_read_symtab_symbols (bfd *abfd)
3764 {
3765 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3766 bfd_mach_o_symtab_command *sym = mdata->symtab;
3767 unsigned long i;
3768
3769 if (sym == NULL || sym->symbols)
3770 /* Return now if there are no symbols or if already loaded. */
3771 return TRUE;
3772
3773 sym->symbols = bfd_alloc2 (abfd, sym->nsyms, sizeof (bfd_mach_o_asymbol));
3774 if (sym->symbols == NULL)
3775 {
3776 (*_bfd_error_handler) (_("bfd_mach_o_read_symtab_symbols: unable to allocate memory for symbols"));
3777 sym->nsyms = 0;
3778 return FALSE;
3779 }
3780
3781 if (!bfd_mach_o_read_symtab_strtab (abfd))
3782 goto fail;
3783
3784 for (i = 0; i < sym->nsyms; i++)
3785 if (!bfd_mach_o_read_symtab_symbol (abfd, sym, &sym->symbols[i], i))
3786 goto fail;
3787
3788 return TRUE;
3789
3790 fail:
3791 bfd_release (abfd, sym->symbols);
3792 sym->symbols = NULL;
3793 sym->nsyms = 0;
3794 return FALSE;
3795 }
3796
3797 static const char *
bfd_mach_o_i386_flavour_string(unsigned int flavour)3798 bfd_mach_o_i386_flavour_string (unsigned int flavour)
3799 {
3800 switch ((int) flavour)
3801 {
3802 case BFD_MACH_O_x86_THREAD_STATE32: return "x86_THREAD_STATE32";
3803 case BFD_MACH_O_x86_FLOAT_STATE32: return "x86_FLOAT_STATE32";
3804 case BFD_MACH_O_x86_EXCEPTION_STATE32: return "x86_EXCEPTION_STATE32";
3805 case BFD_MACH_O_x86_THREAD_STATE64: return "x86_THREAD_STATE64";
3806 case BFD_MACH_O_x86_FLOAT_STATE64: return "x86_FLOAT_STATE64";
3807 case BFD_MACH_O_x86_EXCEPTION_STATE64: return "x86_EXCEPTION_STATE64";
3808 case BFD_MACH_O_x86_THREAD_STATE: return "x86_THREAD_STATE";
3809 case BFD_MACH_O_x86_FLOAT_STATE: return "x86_FLOAT_STATE";
3810 case BFD_MACH_O_x86_EXCEPTION_STATE: return "x86_EXCEPTION_STATE";
3811 case BFD_MACH_O_x86_DEBUG_STATE32: return "x86_DEBUG_STATE32";
3812 case BFD_MACH_O_x86_DEBUG_STATE64: return "x86_DEBUG_STATE64";
3813 case BFD_MACH_O_x86_DEBUG_STATE: return "x86_DEBUG_STATE";
3814 case BFD_MACH_O_x86_THREAD_STATE_NONE: return "x86_THREAD_STATE_NONE";
3815 default: return "UNKNOWN";
3816 }
3817 }
3818
3819 static const char *
bfd_mach_o_ppc_flavour_string(unsigned int flavour)3820 bfd_mach_o_ppc_flavour_string (unsigned int flavour)
3821 {
3822 switch ((int) flavour)
3823 {
3824 case BFD_MACH_O_PPC_THREAD_STATE: return "PPC_THREAD_STATE";
3825 case BFD_MACH_O_PPC_FLOAT_STATE: return "PPC_FLOAT_STATE";
3826 case BFD_MACH_O_PPC_EXCEPTION_STATE: return "PPC_EXCEPTION_STATE";
3827 case BFD_MACH_O_PPC_VECTOR_STATE: return "PPC_VECTOR_STATE";
3828 case BFD_MACH_O_PPC_THREAD_STATE64: return "PPC_THREAD_STATE64";
3829 case BFD_MACH_O_PPC_EXCEPTION_STATE64: return "PPC_EXCEPTION_STATE64";
3830 default: return "UNKNOWN";
3831 }
3832 }
3833
3834 static bfd_boolean
bfd_mach_o_read_dylinker(bfd * abfd,bfd_mach_o_load_command * command)3835 bfd_mach_o_read_dylinker (bfd *abfd, bfd_mach_o_load_command *command)
3836 {
3837 bfd_mach_o_dylinker_command *cmd = &command->command.dylinker;
3838 struct mach_o_str_command_external raw;
3839 unsigned int nameoff;
3840 unsigned int namelen;
3841
3842 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3843 return FALSE;
3844
3845 nameoff = bfd_h_get_32 (abfd, raw.str);
3846
3847 cmd->name_offset = nameoff;
3848 namelen = command->len - nameoff;
3849 nameoff += command->offset;
3850 cmd->name_str = bfd_alloc (abfd, namelen);
3851 if (cmd->name_str == NULL)
3852 return FALSE;
3853 if (bfd_seek (abfd, nameoff, SEEK_SET) != 0
3854 || bfd_bread (cmd->name_str, namelen, abfd) != namelen)
3855 return FALSE;
3856 return TRUE;
3857 }
3858
3859 static bfd_boolean
bfd_mach_o_read_dylib(bfd * abfd,bfd_mach_o_load_command * command)3860 bfd_mach_o_read_dylib (bfd *abfd, bfd_mach_o_load_command *command)
3861 {
3862 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3863 bfd_mach_o_dylib_command *cmd = &command->command.dylib;
3864 struct mach_o_dylib_command_external raw;
3865 unsigned int nameoff;
3866 unsigned int namelen;
3867
3868 switch (command->type)
3869 {
3870 case BFD_MACH_O_LC_LOAD_DYLIB:
3871 case BFD_MACH_O_LC_LAZY_LOAD_DYLIB:
3872 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
3873 case BFD_MACH_O_LC_ID_DYLIB:
3874 case BFD_MACH_O_LC_REEXPORT_DYLIB:
3875 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
3876 break;
3877 default:
3878 BFD_FAIL ();
3879 return FALSE;
3880 }
3881
3882 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3883 return FALSE;
3884
3885 nameoff = bfd_h_get_32 (abfd, raw.name);
3886 cmd->timestamp = bfd_h_get_32 (abfd, raw.timestamp);
3887 cmd->current_version = bfd_h_get_32 (abfd, raw.current_version);
3888 cmd->compatibility_version = bfd_h_get_32 (abfd, raw.compatibility_version);
3889
3890 cmd->name_offset = command->offset + nameoff;
3891 namelen = command->len - nameoff;
3892 cmd->name_str = bfd_alloc (abfd, namelen);
3893 if (cmd->name_str == NULL)
3894 return FALSE;
3895 if (bfd_seek (abfd, mdata->hdr_offset + cmd->name_offset, SEEK_SET) != 0
3896 || bfd_bread (cmd->name_str, namelen, abfd) != namelen)
3897 return FALSE;
3898 return TRUE;
3899 }
3900
3901 static bfd_boolean
bfd_mach_o_read_prebound_dylib(bfd * abfd,bfd_mach_o_load_command * command)3902 bfd_mach_o_read_prebound_dylib (bfd *abfd,
3903 bfd_mach_o_load_command *command)
3904 {
3905 bfd_mach_o_prebound_dylib_command *cmd = &command->command.prebound_dylib;
3906 struct mach_o_prebound_dylib_command_external raw;
3907 unsigned int nameoff;
3908 unsigned int modoff;
3909 unsigned int str_len;
3910 unsigned char *str;
3911
3912 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3913 return FALSE;
3914
3915 nameoff = bfd_h_get_32 (abfd, raw.name);
3916 modoff = bfd_h_get_32 (abfd, raw.linked_modules);
3917 if (nameoff > command->len || modoff > command->len)
3918 return FALSE;
3919
3920 str_len = command->len - sizeof (raw);
3921 str = bfd_alloc (abfd, str_len);
3922 if (str == NULL)
3923 return FALSE;
3924 if (bfd_bread (str, str_len, abfd) != str_len)
3925 return FALSE;
3926
3927 cmd->name_offset = command->offset + nameoff;
3928 cmd->nmodules = bfd_h_get_32 (abfd, raw.nmodules);
3929 cmd->linked_modules_offset = command->offset + modoff;
3930
3931 cmd->name_str = (char *)str + nameoff - (sizeof (raw) + BFD_MACH_O_LC_SIZE);
3932 cmd->linked_modules = str + modoff - (sizeof (raw) + BFD_MACH_O_LC_SIZE);
3933 return TRUE;
3934 }
3935
3936 static bfd_boolean
bfd_mach_o_read_prebind_cksum(bfd * abfd,bfd_mach_o_load_command * command)3937 bfd_mach_o_read_prebind_cksum (bfd *abfd,
3938 bfd_mach_o_load_command *command)
3939 {
3940 bfd_mach_o_prebind_cksum_command *cmd = &command->command.prebind_cksum;
3941 struct mach_o_prebind_cksum_command_external raw;
3942
3943 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3944 return FALSE;
3945
3946 cmd->cksum = bfd_get_32 (abfd, raw.cksum);
3947 return TRUE;
3948 }
3949
3950 static bfd_boolean
bfd_mach_o_read_twolevel_hints(bfd * abfd,bfd_mach_o_load_command * command)3951 bfd_mach_o_read_twolevel_hints (bfd *abfd,
3952 bfd_mach_o_load_command *command)
3953 {
3954 bfd_mach_o_twolevel_hints_command *cmd = &command->command.twolevel_hints;
3955 struct mach_o_twolevel_hints_command_external raw;
3956
3957 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3958 return FALSE;
3959
3960 cmd->offset = bfd_get_32 (abfd, raw.offset);
3961 cmd->nhints = bfd_get_32 (abfd, raw.nhints);
3962 return TRUE;
3963 }
3964
3965 static bfd_boolean
bfd_mach_o_read_fvmlib(bfd * abfd,bfd_mach_o_load_command * command)3966 bfd_mach_o_read_fvmlib (bfd *abfd, bfd_mach_o_load_command *command)
3967 {
3968 bfd_mach_o_fvmlib_command *fvm = &command->command.fvmlib;
3969 struct mach_o_fvmlib_command_external raw;
3970 unsigned int nameoff;
3971 unsigned int namelen;
3972
3973 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3974 return FALSE;
3975
3976 nameoff = bfd_h_get_32 (abfd, raw.name);
3977 fvm->minor_version = bfd_h_get_32 (abfd, raw.minor_version);
3978 fvm->header_addr = bfd_h_get_32 (abfd, raw.header_addr);
3979
3980 fvm->name_offset = command->offset + nameoff;
3981 namelen = command->len - nameoff;
3982 fvm->name_str = bfd_alloc (abfd, namelen);
3983 if (fvm->name_str == NULL)
3984 return FALSE;
3985 if (bfd_seek (abfd, fvm->name_offset, SEEK_SET) != 0
3986 || bfd_bread (fvm->name_str, namelen, abfd) != namelen)
3987 return FALSE;
3988 return TRUE;
3989 }
3990
3991 static bfd_boolean
bfd_mach_o_read_thread(bfd * abfd,bfd_mach_o_load_command * command)3992 bfd_mach_o_read_thread (bfd *abfd, bfd_mach_o_load_command *command)
3993 {
3994 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3995 bfd_mach_o_thread_command *cmd = &command->command.thread;
3996 unsigned int offset;
3997 unsigned int nflavours;
3998 unsigned int i;
3999
4000 BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD)
4001 || (command->type == BFD_MACH_O_LC_UNIXTHREAD));
4002
4003 /* Count the number of threads. */
4004 offset = 8;
4005 nflavours = 0;
4006 while (offset != command->len)
4007 {
4008 struct mach_o_thread_command_external raw;
4009
4010 if (offset >= command->len)
4011 return FALSE;
4012
4013 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
4014 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4015 return FALSE;
4016
4017 offset += sizeof (raw) + bfd_h_get_32 (abfd, raw.count) * 4;
4018 nflavours++;
4019 }
4020
4021 /* Allocate threads. */
4022 cmd->flavours = bfd_alloc2
4023 (abfd, nflavours, sizeof (bfd_mach_o_thread_flavour));
4024 if (cmd->flavours == NULL)
4025 return FALSE;
4026 cmd->nflavours = nflavours;
4027
4028 offset = 8;
4029 nflavours = 0;
4030 while (offset != command->len)
4031 {
4032 struct mach_o_thread_command_external raw;
4033
4034 if (offset >= command->len)
4035 return FALSE;
4036
4037 if (nflavours >= cmd->nflavours)
4038 return FALSE;
4039
4040 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
4041 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4042 return FALSE;
4043
4044 cmd->flavours[nflavours].flavour = bfd_h_get_32 (abfd, raw.flavour);
4045 cmd->flavours[nflavours].offset = command->offset + offset + sizeof (raw);
4046 cmd->flavours[nflavours].size = bfd_h_get_32 (abfd, raw.count) * 4;
4047 offset += cmd->flavours[nflavours].size + sizeof (raw);
4048 nflavours++;
4049 }
4050
4051 for (i = 0; i < nflavours; i++)
4052 {
4053 asection *bfdsec;
4054 unsigned int snamelen;
4055 char *sname;
4056 const char *flavourstr;
4057 const char *prefix = "LC_THREAD";
4058 unsigned int j = 0;
4059
4060 switch (mdata->header.cputype)
4061 {
4062 case BFD_MACH_O_CPU_TYPE_POWERPC:
4063 case BFD_MACH_O_CPU_TYPE_POWERPC_64:
4064 flavourstr =
4065 bfd_mach_o_ppc_flavour_string (cmd->flavours[i].flavour);
4066 break;
4067 case BFD_MACH_O_CPU_TYPE_I386:
4068 case BFD_MACH_O_CPU_TYPE_X86_64:
4069 flavourstr =
4070 bfd_mach_o_i386_flavour_string (cmd->flavours[i].flavour);
4071 break;
4072 default:
4073 flavourstr = "UNKNOWN_ARCHITECTURE";
4074 break;
4075 }
4076
4077 snamelen = strlen (prefix) + 1 + 20 + 1 + strlen (flavourstr) + 1;
4078 sname = bfd_alloc (abfd, snamelen);
4079 if (sname == NULL)
4080 return FALSE;
4081
4082 for (;;)
4083 {
4084 sprintf (sname, "%s.%s.%u", prefix, flavourstr, j);
4085 if (bfd_get_section_by_name (abfd, sname) == NULL)
4086 break;
4087 j++;
4088 }
4089
4090 bfdsec = bfd_make_section_with_flags (abfd, sname, SEC_HAS_CONTENTS);
4091
4092 bfdsec->vma = 0;
4093 bfdsec->lma = 0;
4094 bfdsec->size = cmd->flavours[i].size;
4095 bfdsec->filepos = cmd->flavours[i].offset;
4096 bfdsec->alignment_power = 0x0;
4097
4098 cmd->section = bfdsec;
4099 }
4100
4101 return TRUE;
4102 }
4103
4104 static bfd_boolean
bfd_mach_o_read_dysymtab(bfd * abfd,bfd_mach_o_load_command * command)4105 bfd_mach_o_read_dysymtab (bfd *abfd, bfd_mach_o_load_command *command)
4106 {
4107 bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab;
4108 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4109
4110 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB);
4111
4112 {
4113 struct mach_o_dysymtab_command_external raw;
4114
4115 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4116 return FALSE;
4117
4118 cmd->ilocalsym = bfd_h_get_32 (abfd, raw.ilocalsym);
4119 cmd->nlocalsym = bfd_h_get_32 (abfd, raw.nlocalsym);
4120 cmd->iextdefsym = bfd_h_get_32 (abfd, raw.iextdefsym);
4121 cmd->nextdefsym = bfd_h_get_32 (abfd, raw.nextdefsym);
4122 cmd->iundefsym = bfd_h_get_32 (abfd, raw.iundefsym);
4123 cmd->nundefsym = bfd_h_get_32 (abfd, raw.nundefsym);
4124 cmd->tocoff = bfd_h_get_32 (abfd, raw.tocoff);
4125 cmd->ntoc = bfd_h_get_32 (abfd, raw.ntoc);
4126 cmd->modtaboff = bfd_h_get_32 (abfd, raw.modtaboff);
4127 cmd->nmodtab = bfd_h_get_32 (abfd, raw.nmodtab);
4128 cmd->extrefsymoff = bfd_h_get_32 (abfd, raw.extrefsymoff);
4129 cmd->nextrefsyms = bfd_h_get_32 (abfd, raw.nextrefsyms);
4130 cmd->indirectsymoff = bfd_h_get_32 (abfd, raw.indirectsymoff);
4131 cmd->nindirectsyms = bfd_h_get_32 (abfd, raw.nindirectsyms);
4132 cmd->extreloff = bfd_h_get_32 (abfd, raw.extreloff);
4133 cmd->nextrel = bfd_h_get_32 (abfd, raw.nextrel);
4134 cmd->locreloff = bfd_h_get_32 (abfd, raw.locreloff);
4135 cmd->nlocrel = bfd_h_get_32 (abfd, raw.nlocrel);
4136 }
4137
4138 if (cmd->nmodtab != 0)
4139 {
4140 unsigned int i;
4141 int wide = bfd_mach_o_wide_p (abfd);
4142 unsigned int module_len = wide ? 56 : 52;
4143
4144 cmd->dylib_module =
4145 bfd_alloc2 (abfd, cmd->nmodtab, sizeof (bfd_mach_o_dylib_module));
4146 if (cmd->dylib_module == NULL)
4147 return FALSE;
4148
4149 if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0)
4150 return FALSE;
4151
4152 for (i = 0; i < cmd->nmodtab; i++)
4153 {
4154 bfd_mach_o_dylib_module *module = &cmd->dylib_module[i];
4155 unsigned long v;
4156 unsigned char buf[56];
4157
4158 if (bfd_bread ((void *) buf, module_len, abfd) != module_len)
4159 return FALSE;
4160
4161 module->module_name_idx = bfd_h_get_32 (abfd, buf + 0);
4162 module->iextdefsym = bfd_h_get_32 (abfd, buf + 4);
4163 module->nextdefsym = bfd_h_get_32 (abfd, buf + 8);
4164 module->irefsym = bfd_h_get_32 (abfd, buf + 12);
4165 module->nrefsym = bfd_h_get_32 (abfd, buf + 16);
4166 module->ilocalsym = bfd_h_get_32 (abfd, buf + 20);
4167 module->nlocalsym = bfd_h_get_32 (abfd, buf + 24);
4168 module->iextrel = bfd_h_get_32 (abfd, buf + 28);
4169 module->nextrel = bfd_h_get_32 (abfd, buf + 32);
4170 v = bfd_h_get_32 (abfd, buf +36);
4171 module->iinit = v & 0xffff;
4172 module->iterm = (v >> 16) & 0xffff;
4173 v = bfd_h_get_32 (abfd, buf + 40);
4174 module->ninit = v & 0xffff;
4175 module->nterm = (v >> 16) & 0xffff;
4176 if (wide)
4177 {
4178 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 44);
4179 module->objc_module_info_addr = bfd_h_get_64 (abfd, buf + 48);
4180 }
4181 else
4182 {
4183 module->objc_module_info_addr = bfd_h_get_32 (abfd, buf + 44);
4184 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 48);
4185 }
4186 }
4187 }
4188
4189 if (cmd->ntoc != 0)
4190 {
4191 unsigned long i;
4192
4193 cmd->dylib_toc = bfd_alloc2
4194 (abfd, cmd->ntoc, sizeof (bfd_mach_o_dylib_table_of_content));
4195 if (cmd->dylib_toc == NULL)
4196 return FALSE;
4197
4198 if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0)
4199 return FALSE;
4200
4201 for (i = 0; i < cmd->ntoc; i++)
4202 {
4203 struct mach_o_dylib_table_of_contents_external raw;
4204 bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i];
4205
4206 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4207 return FALSE;
4208
4209 toc->symbol_index = bfd_h_get_32 (abfd, raw.symbol_index);
4210 toc->module_index = bfd_h_get_32 (abfd, raw.module_index);
4211 }
4212 }
4213
4214 if (cmd->nindirectsyms != 0)
4215 {
4216 unsigned int i;
4217
4218 cmd->indirect_syms = bfd_alloc2
4219 (abfd, cmd->nindirectsyms, sizeof (unsigned int));
4220 if (cmd->indirect_syms == NULL)
4221 return FALSE;
4222
4223 if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0)
4224 return FALSE;
4225
4226 for (i = 0; i < cmd->nindirectsyms; i++)
4227 {
4228 unsigned char raw[4];
4229 unsigned int *is = &cmd->indirect_syms[i];
4230
4231 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw))
4232 return FALSE;
4233
4234 *is = bfd_h_get_32 (abfd, raw);
4235 }
4236 }
4237
4238 if (cmd->nextrefsyms != 0)
4239 {
4240 unsigned long v;
4241 unsigned int i;
4242
4243 cmd->ext_refs = bfd_alloc2
4244 (abfd, cmd->nextrefsyms, sizeof (bfd_mach_o_dylib_reference));
4245 if (cmd->ext_refs == NULL)
4246 return FALSE;
4247
4248 if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0)
4249 return FALSE;
4250
4251 for (i = 0; i < cmd->nextrefsyms; i++)
4252 {
4253 unsigned char raw[4];
4254 bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i];
4255
4256 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw))
4257 return FALSE;
4258
4259 /* Fields isym and flags are written as bit-fields, thus we need
4260 a specific processing for endianness. */
4261 v = bfd_h_get_32 (abfd, raw);
4262 if (bfd_big_endian (abfd))
4263 {
4264 ref->isym = (v >> 8) & 0xffffff;
4265 ref->flags = v & 0xff;
4266 }
4267 else
4268 {
4269 ref->isym = v & 0xffffff;
4270 ref->flags = (v >> 24) & 0xff;
4271 }
4272 }
4273 }
4274
4275 if (mdata->dysymtab)
4276 return FALSE;
4277 mdata->dysymtab = cmd;
4278
4279 return TRUE;
4280 }
4281
4282 static bfd_boolean
bfd_mach_o_read_symtab(bfd * abfd,bfd_mach_o_load_command * command)4283 bfd_mach_o_read_symtab (bfd *abfd, bfd_mach_o_load_command *command)
4284 {
4285 bfd_mach_o_symtab_command *symtab = &command->command.symtab;
4286 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4287 struct mach_o_symtab_command_external raw;
4288
4289 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB);
4290
4291 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4292 return FALSE;
4293
4294 symtab->symoff = bfd_h_get_32 (abfd, raw.symoff);
4295 symtab->nsyms = bfd_h_get_32 (abfd, raw.nsyms);
4296 symtab->stroff = bfd_h_get_32 (abfd, raw.stroff);
4297 symtab->strsize = bfd_h_get_32 (abfd, raw.strsize);
4298 symtab->symbols = NULL;
4299 symtab->strtab = NULL;
4300
4301 if (symtab->nsyms != 0)
4302 abfd->flags |= HAS_SYMS;
4303
4304 if (mdata->symtab)
4305 return FALSE;
4306 mdata->symtab = symtab;
4307 return TRUE;
4308 }
4309
4310 static bfd_boolean
bfd_mach_o_read_uuid(bfd * abfd,bfd_mach_o_load_command * command)4311 bfd_mach_o_read_uuid (bfd *abfd, bfd_mach_o_load_command *command)
4312 {
4313 bfd_mach_o_uuid_command *cmd = &command->command.uuid;
4314
4315 BFD_ASSERT (command->type == BFD_MACH_O_LC_UUID);
4316
4317 if (bfd_bread (cmd->uuid, 16, abfd) != 16)
4318 return FALSE;
4319
4320 return TRUE;
4321 }
4322
4323 static bfd_boolean
bfd_mach_o_read_linkedit(bfd * abfd,bfd_mach_o_load_command * command)4324 bfd_mach_o_read_linkedit (bfd *abfd, bfd_mach_o_load_command *command)
4325 {
4326 bfd_mach_o_linkedit_command *cmd = &command->command.linkedit;
4327 struct mach_o_linkedit_data_command_external raw;
4328
4329 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4330 return FALSE;
4331
4332 cmd->dataoff = bfd_get_32 (abfd, raw.dataoff);
4333 cmd->datasize = bfd_get_32 (abfd, raw.datasize);
4334 return TRUE;
4335 }
4336
4337 static bfd_boolean
bfd_mach_o_read_str(bfd * abfd,bfd_mach_o_load_command * command)4338 bfd_mach_o_read_str (bfd *abfd, bfd_mach_o_load_command *command)
4339 {
4340 bfd_mach_o_str_command *cmd = &command->command.str;
4341 struct mach_o_str_command_external raw;
4342 unsigned long off;
4343
4344 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4345 return FALSE;
4346
4347 off = bfd_get_32 (abfd, raw.str);
4348 cmd->stroff = command->offset + off;
4349 cmd->str_len = command->len - off;
4350 cmd->str = bfd_alloc (abfd, cmd->str_len);
4351 if (cmd->str == NULL)
4352 return FALSE;
4353 if (bfd_seek (abfd, cmd->stroff, SEEK_SET) != 0
4354 || bfd_bread ((void *) cmd->str, cmd->str_len, abfd) != cmd->str_len)
4355 return FALSE;
4356 return TRUE;
4357 }
4358
4359 static unsigned char *
bfd_mach_o_alloc_and_read(bfd * abfd,unsigned int off,unsigned int size)4360 bfd_mach_o_alloc_and_read (bfd *abfd, unsigned int off, unsigned int size)
4361 {
4362 unsigned char *buf;
4363
4364 buf = bfd_alloc (abfd, size);
4365 if (buf == NULL)
4366 return NULL;
4367 if (bfd_seek (abfd, off, SEEK_SET) != 0
4368 || bfd_bread (buf, size, abfd) != size)
4369 return NULL;
4370 return buf;
4371 }
4372
4373 static bfd_boolean
bfd_mach_o_read_dyld_content(bfd * abfd,bfd_mach_o_dyld_info_command * cmd)4374 bfd_mach_o_read_dyld_content (bfd *abfd, bfd_mach_o_dyld_info_command *cmd)
4375 {
4376 /* Read rebase content. */
4377 if (cmd->rebase_content == NULL && cmd->rebase_size != 0)
4378 {
4379 cmd->rebase_content =
4380 bfd_mach_o_alloc_and_read (abfd, cmd->rebase_off, cmd->rebase_size);
4381 if (cmd->rebase_content == NULL)
4382 return FALSE;
4383 }
4384
4385 /* Read bind content. */
4386 if (cmd->bind_content == NULL && cmd->bind_size != 0)
4387 {
4388 cmd->bind_content =
4389 bfd_mach_o_alloc_and_read (abfd, cmd->bind_off, cmd->bind_size);
4390 if (cmd->bind_content == NULL)
4391 return FALSE;
4392 }
4393
4394 /* Read weak bind content. */
4395 if (cmd->weak_bind_content == NULL && cmd->weak_bind_size != 0)
4396 {
4397 cmd->weak_bind_content = bfd_mach_o_alloc_and_read
4398 (abfd, cmd->weak_bind_off, cmd->weak_bind_size);
4399 if (cmd->weak_bind_content == NULL)
4400 return FALSE;
4401 }
4402
4403 /* Read lazy bind content. */
4404 if (cmd->lazy_bind_content == NULL && cmd->lazy_bind_size != 0)
4405 {
4406 cmd->lazy_bind_content = bfd_mach_o_alloc_and_read
4407 (abfd, cmd->lazy_bind_off, cmd->lazy_bind_size);
4408 if (cmd->lazy_bind_content == NULL)
4409 return FALSE;
4410 }
4411
4412 /* Read export content. */
4413 if (cmd->export_content == NULL && cmd->export_size != 0)
4414 {
4415 cmd->export_content = bfd_mach_o_alloc_and_read
4416 (abfd, cmd->export_off, cmd->export_size);
4417 if (cmd->export_content == NULL)
4418 return FALSE;
4419 }
4420
4421 return TRUE;
4422 }
4423
4424 static bfd_boolean
bfd_mach_o_read_dyld_info(bfd * abfd,bfd_mach_o_load_command * command)4425 bfd_mach_o_read_dyld_info (bfd *abfd, bfd_mach_o_load_command *command)
4426 {
4427 bfd_mach_o_dyld_info_command *cmd = &command->command.dyld_info;
4428 struct mach_o_dyld_info_command_external raw;
4429
4430 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4431 return FALSE;
4432
4433 cmd->rebase_off = bfd_get_32 (abfd, raw.rebase_off);
4434 cmd->rebase_size = bfd_get_32 (abfd, raw.rebase_size);
4435 cmd->rebase_content = NULL;
4436 cmd->bind_off = bfd_get_32 (abfd, raw.bind_off);
4437 cmd->bind_size = bfd_get_32 (abfd, raw.bind_size);
4438 cmd->bind_content = NULL;
4439 cmd->weak_bind_off = bfd_get_32 (abfd, raw.weak_bind_off);
4440 cmd->weak_bind_size = bfd_get_32 (abfd, raw.weak_bind_size);
4441 cmd->weak_bind_content = NULL;
4442 cmd->lazy_bind_off = bfd_get_32 (abfd, raw.lazy_bind_off);
4443 cmd->lazy_bind_size = bfd_get_32 (abfd, raw.lazy_bind_size);
4444 cmd->lazy_bind_content = NULL;
4445 cmd->export_off = bfd_get_32 (abfd, raw.export_off);
4446 cmd->export_size = bfd_get_32 (abfd, raw.export_size);
4447 cmd->export_content = NULL;
4448 return TRUE;
4449 }
4450
4451 static bfd_boolean
bfd_mach_o_read_version_min(bfd * abfd,bfd_mach_o_load_command * command)4452 bfd_mach_o_read_version_min (bfd *abfd, bfd_mach_o_load_command *command)
4453 {
4454 bfd_mach_o_version_min_command *cmd = &command->command.version_min;
4455 struct mach_o_version_min_command_external raw;
4456 unsigned int ver;
4457
4458 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4459 return FALSE;
4460
4461 ver = bfd_get_32 (abfd, raw.version);
4462 cmd->rel = ver >> 16;
4463 cmd->maj = ver >> 8;
4464 cmd->min = ver;
4465 cmd->reserved = bfd_get_32 (abfd, raw.reserved);
4466 return TRUE;
4467 }
4468
4469 static bfd_boolean
bfd_mach_o_read_encryption_info(bfd * abfd,bfd_mach_o_load_command * command)4470 bfd_mach_o_read_encryption_info (bfd *abfd, bfd_mach_o_load_command *command)
4471 {
4472 bfd_mach_o_encryption_info_command *cmd = &command->command.encryption_info;
4473 struct mach_o_encryption_info_command_external raw;
4474
4475 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4476 return FALSE;
4477
4478 cmd->cryptoff = bfd_get_32 (abfd, raw.cryptoff);
4479 cmd->cryptsize = bfd_get_32 (abfd, raw.cryptsize);
4480 cmd->cryptid = bfd_get_32 (abfd, raw.cryptid);
4481 return TRUE;
4482 }
4483
4484 static bfd_boolean
bfd_mach_o_read_encryption_info_64(bfd * abfd,bfd_mach_o_load_command * command)4485 bfd_mach_o_read_encryption_info_64 (bfd *abfd, bfd_mach_o_load_command *command)
4486 {
4487 bfd_mach_o_encryption_info_command *cmd = &command->command.encryption_info;
4488 struct mach_o_encryption_info_64_command_external raw;
4489
4490 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4491 return FALSE;
4492
4493 cmd->cryptoff = bfd_get_32 (abfd, raw.cryptoff);
4494 cmd->cryptsize = bfd_get_32 (abfd, raw.cryptsize);
4495 cmd->cryptid = bfd_get_32 (abfd, raw.cryptid);
4496 return TRUE;
4497 }
4498
4499 static bfd_boolean
bfd_mach_o_read_main(bfd * abfd,bfd_mach_o_load_command * command)4500 bfd_mach_o_read_main (bfd *abfd, bfd_mach_o_load_command *command)
4501 {
4502 bfd_mach_o_main_command *cmd = &command->command.main;
4503 struct mach_o_entry_point_command_external raw;
4504
4505 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4506 return FALSE;
4507
4508 cmd->entryoff = bfd_get_64 (abfd, raw.entryoff);
4509 cmd->stacksize = bfd_get_64 (abfd, raw.stacksize);
4510 return TRUE;
4511 }
4512
4513 static bfd_boolean
bfd_mach_o_read_source_version(bfd * abfd,bfd_mach_o_load_command * command)4514 bfd_mach_o_read_source_version (bfd *abfd, bfd_mach_o_load_command *command)
4515 {
4516 bfd_mach_o_source_version_command *cmd = &command->command.source_version;
4517 struct mach_o_source_version_command_external raw;
4518 bfd_uint64_t ver;
4519
4520 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4521 return FALSE;
4522
4523 ver = bfd_get_64 (abfd, raw.version);
4524 /* Note: we use a serie of shift to avoid shift > 32 (for which gcc
4525 generates warnings) in case of the host doesn't support 64 bit
4526 integers. */
4527 cmd->e = ver & 0x3ff;
4528 ver >>= 10;
4529 cmd->d = ver & 0x3ff;
4530 ver >>= 10;
4531 cmd->c = ver & 0x3ff;
4532 ver >>= 10;
4533 cmd->b = ver & 0x3ff;
4534 ver >>= 10;
4535 cmd->a = ver & 0xffffff;
4536 return TRUE;
4537 }
4538
4539 static bfd_boolean
bfd_mach_o_read_segment(bfd * abfd,bfd_mach_o_load_command * command,unsigned int wide)4540 bfd_mach_o_read_segment (bfd *abfd,
4541 bfd_mach_o_load_command *command,
4542 unsigned int wide)
4543 {
4544 bfd_mach_o_segment_command *seg = &command->command.segment;
4545 unsigned long i;
4546
4547 if (wide)
4548 {
4549 struct mach_o_segment_command_64_external raw;
4550
4551 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64);
4552
4553 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4554 return FALSE;
4555
4556 memcpy (seg->segname, raw.segname, 16);
4557 seg->segname[16] = '\0';
4558
4559 seg->vmaddr = bfd_h_get_64 (abfd, raw.vmaddr);
4560 seg->vmsize = bfd_h_get_64 (abfd, raw.vmsize);
4561 seg->fileoff = bfd_h_get_64 (abfd, raw.fileoff);
4562 seg->filesize = bfd_h_get_64 (abfd, raw.filesize);
4563 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot);
4564 seg->initprot = bfd_h_get_32 (abfd, raw.initprot);
4565 seg->nsects = bfd_h_get_32 (abfd, raw.nsects);
4566 seg->flags = bfd_h_get_32 (abfd, raw.flags);
4567 }
4568 else
4569 {
4570 struct mach_o_segment_command_32_external raw;
4571
4572 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT);
4573
4574 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4575 return FALSE;
4576
4577 memcpy (seg->segname, raw.segname, 16);
4578 seg->segname[16] = '\0';
4579
4580 seg->vmaddr = bfd_h_get_32 (abfd, raw.vmaddr);
4581 seg->vmsize = bfd_h_get_32 (abfd, raw.vmsize);
4582 seg->fileoff = bfd_h_get_32 (abfd, raw.fileoff);
4583 seg->filesize = bfd_h_get_32 (abfd, raw.filesize);
4584 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot);
4585 seg->initprot = bfd_h_get_32 (abfd, raw.initprot);
4586 seg->nsects = bfd_h_get_32 (abfd, raw.nsects);
4587 seg->flags = bfd_h_get_32 (abfd, raw.flags);
4588 }
4589 seg->sect_head = NULL;
4590 seg->sect_tail = NULL;
4591
4592 for (i = 0; i < seg->nsects; i++)
4593 {
4594 asection *sec;
4595
4596 sec = bfd_mach_o_read_section (abfd, seg->initprot, wide);
4597 if (sec == NULL)
4598 return FALSE;
4599
4600 bfd_mach_o_append_section_to_segment
4601 (seg, bfd_mach_o_get_mach_o_section (sec));
4602 }
4603
4604 return TRUE;
4605 }
4606
4607 static bfd_boolean
bfd_mach_o_read_segment_32(bfd * abfd,bfd_mach_o_load_command * command)4608 bfd_mach_o_read_segment_32 (bfd *abfd, bfd_mach_o_load_command *command)
4609 {
4610 return bfd_mach_o_read_segment (abfd, command, 0);
4611 }
4612
4613 static bfd_boolean
bfd_mach_o_read_segment_64(bfd * abfd,bfd_mach_o_load_command * command)4614 bfd_mach_o_read_segment_64 (bfd *abfd, bfd_mach_o_load_command *command)
4615 {
4616 return bfd_mach_o_read_segment (abfd, command, 1);
4617 }
4618
4619 static bfd_boolean
bfd_mach_o_read_command(bfd * abfd,bfd_mach_o_load_command * command)4620 bfd_mach_o_read_command (bfd *abfd, bfd_mach_o_load_command *command)
4621 {
4622 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4623 struct mach_o_load_command_external raw;
4624 unsigned int cmd;
4625
4626 /* Read command type and length. */
4627 if (bfd_seek (abfd, mdata->hdr_offset + command->offset, SEEK_SET) != 0
4628 || bfd_bread (&raw, BFD_MACH_O_LC_SIZE, abfd) != BFD_MACH_O_LC_SIZE)
4629 return FALSE;
4630
4631 cmd = bfd_h_get_32 (abfd, raw.cmd);
4632 command->type = cmd & ~BFD_MACH_O_LC_REQ_DYLD;
4633 command->type_required = cmd & BFD_MACH_O_LC_REQ_DYLD ? TRUE : FALSE;
4634 command->len = bfd_h_get_32 (abfd, raw.cmdsize);
4635
4636 switch (command->type)
4637 {
4638 case BFD_MACH_O_LC_SEGMENT:
4639 if (!bfd_mach_o_read_segment_32 (abfd, command))
4640 return FALSE;
4641 break;
4642 case BFD_MACH_O_LC_SEGMENT_64:
4643 if (!bfd_mach_o_read_segment_64 (abfd, command))
4644 return FALSE;
4645 break;
4646 case BFD_MACH_O_LC_SYMTAB:
4647 if (!bfd_mach_o_read_symtab (abfd, command))
4648 return FALSE;
4649 break;
4650 case BFD_MACH_O_LC_SYMSEG:
4651 break;
4652 case BFD_MACH_O_LC_THREAD:
4653 case BFD_MACH_O_LC_UNIXTHREAD:
4654 if (!bfd_mach_o_read_thread (abfd, command))
4655 return FALSE;
4656 break;
4657 case BFD_MACH_O_LC_LOAD_DYLINKER:
4658 case BFD_MACH_O_LC_ID_DYLINKER:
4659 case BFD_MACH_O_LC_DYLD_ENVIRONMENT:
4660 if (!bfd_mach_o_read_dylinker (abfd, command))
4661 return FALSE;
4662 break;
4663 case BFD_MACH_O_LC_LOAD_DYLIB:
4664 case BFD_MACH_O_LC_LAZY_LOAD_DYLIB:
4665 case BFD_MACH_O_LC_ID_DYLIB:
4666 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
4667 case BFD_MACH_O_LC_REEXPORT_DYLIB:
4668 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
4669 if (!bfd_mach_o_read_dylib (abfd, command))
4670 return FALSE;
4671 break;
4672 case BFD_MACH_O_LC_PREBOUND_DYLIB:
4673 if (!bfd_mach_o_read_prebound_dylib (abfd, command))
4674 return FALSE;
4675 break;
4676 case BFD_MACH_O_LC_LOADFVMLIB:
4677 case BFD_MACH_O_LC_IDFVMLIB:
4678 if (!bfd_mach_o_read_fvmlib (abfd, command))
4679 return FALSE;
4680 break;
4681 case BFD_MACH_O_LC_IDENT:
4682 case BFD_MACH_O_LC_FVMFILE:
4683 case BFD_MACH_O_LC_PREPAGE:
4684 case BFD_MACH_O_LC_ROUTINES:
4685 case BFD_MACH_O_LC_ROUTINES_64:
4686 break;
4687 case BFD_MACH_O_LC_SUB_FRAMEWORK:
4688 case BFD_MACH_O_LC_SUB_UMBRELLA:
4689 case BFD_MACH_O_LC_SUB_LIBRARY:
4690 case BFD_MACH_O_LC_SUB_CLIENT:
4691 case BFD_MACH_O_LC_RPATH:
4692 if (!bfd_mach_o_read_str (abfd, command))
4693 return FALSE;
4694 break;
4695 case BFD_MACH_O_LC_DYSYMTAB:
4696 if (!bfd_mach_o_read_dysymtab (abfd, command))
4697 return FALSE;
4698 break;
4699 case BFD_MACH_O_LC_PREBIND_CKSUM:
4700 if (!bfd_mach_o_read_prebind_cksum (abfd, command))
4701 return FALSE;
4702 break;
4703 case BFD_MACH_O_LC_TWOLEVEL_HINTS:
4704 if (!bfd_mach_o_read_twolevel_hints (abfd, command))
4705 return FALSE;
4706 break;
4707 case BFD_MACH_O_LC_UUID:
4708 if (!bfd_mach_o_read_uuid (abfd, command))
4709 return FALSE;
4710 break;
4711 case BFD_MACH_O_LC_CODE_SIGNATURE:
4712 case BFD_MACH_O_LC_SEGMENT_SPLIT_INFO:
4713 case BFD_MACH_O_LC_FUNCTION_STARTS:
4714 case BFD_MACH_O_LC_DATA_IN_CODE:
4715 case BFD_MACH_O_LC_DYLIB_CODE_SIGN_DRS:
4716 case BFD_MACH_O_LC_LINKER_OPTIMIZATION_HINT:
4717 if (!bfd_mach_o_read_linkedit (abfd, command))
4718 return FALSE;
4719 break;
4720 case BFD_MACH_O_LC_ENCRYPTION_INFO:
4721 if (!bfd_mach_o_read_encryption_info (abfd, command))
4722 return FALSE;
4723 break;
4724 case BFD_MACH_O_LC_ENCRYPTION_INFO_64:
4725 if (!bfd_mach_o_read_encryption_info_64 (abfd, command))
4726 return FALSE;
4727 break;
4728 case BFD_MACH_O_LC_DYLD_INFO:
4729 if (!bfd_mach_o_read_dyld_info (abfd, command))
4730 return FALSE;
4731 break;
4732 case BFD_MACH_O_LC_VERSION_MIN_MACOSX:
4733 case BFD_MACH_O_LC_VERSION_MIN_IPHONEOS:
4734 case BFD_MACH_O_LC_VERSION_MIN_WATCHOS:
4735 if (!bfd_mach_o_read_version_min (abfd, command))
4736 return FALSE;
4737 break;
4738 case BFD_MACH_O_LC_MAIN:
4739 if (!bfd_mach_o_read_main (abfd, command))
4740 return FALSE;
4741 break;
4742 case BFD_MACH_O_LC_SOURCE_VERSION:
4743 if (!bfd_mach_o_read_source_version (abfd, command))
4744 return FALSE;
4745 break;
4746 default:
4747 command->len = 0;
4748 (*_bfd_error_handler)(_("%B: unknown load command 0x%lx"),
4749 abfd, (unsigned long) command->type);
4750 return FALSE;
4751 }
4752
4753 return TRUE;
4754 }
4755
4756 static void
bfd_mach_o_flatten_sections(bfd * abfd)4757 bfd_mach_o_flatten_sections (bfd *abfd)
4758 {
4759 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4760 bfd_mach_o_load_command *cmd;
4761 long csect = 0;
4762
4763 /* Count total number of sections. */
4764 mdata->nsects = 0;
4765
4766 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
4767 {
4768 if (cmd->type == BFD_MACH_O_LC_SEGMENT
4769 || cmd->type == BFD_MACH_O_LC_SEGMENT_64)
4770 {
4771 bfd_mach_o_segment_command *seg = &cmd->command.segment;
4772
4773 mdata->nsects += seg->nsects;
4774 }
4775 }
4776
4777 /* Allocate sections array. */
4778 mdata->sections = bfd_alloc2 (abfd,
4779 mdata->nsects, sizeof (bfd_mach_o_section *));
4780
4781 /* Fill the array. */
4782 csect = 0;
4783
4784 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
4785 {
4786 if (cmd->type == BFD_MACH_O_LC_SEGMENT
4787 || cmd->type == BFD_MACH_O_LC_SEGMENT_64)
4788 {
4789 bfd_mach_o_segment_command *seg = &cmd->command.segment;
4790 bfd_mach_o_section *sec;
4791
4792 BFD_ASSERT (csect + seg->nsects <= mdata->nsects);
4793
4794 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
4795 mdata->sections[csect++] = sec;
4796 }
4797 }
4798 }
4799
4800 static bfd_boolean
bfd_mach_o_scan_start_address(bfd * abfd)4801 bfd_mach_o_scan_start_address (bfd *abfd)
4802 {
4803 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4804 bfd_mach_o_thread_command *thr = NULL;
4805 bfd_mach_o_load_command *cmd;
4806 unsigned long i;
4807
4808 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
4809 if (cmd->type == BFD_MACH_O_LC_THREAD
4810 || cmd->type == BFD_MACH_O_LC_UNIXTHREAD)
4811 {
4812 thr = &cmd->command.thread;
4813 break;
4814 }
4815 else if (cmd->type == BFD_MACH_O_LC_MAIN && mdata->nsects > 1)
4816 {
4817 bfd_mach_o_main_command *main_cmd = &cmd->command.main;
4818 bfd_mach_o_section *text_sect = mdata->sections[0];
4819
4820 if (text_sect)
4821 {
4822 abfd->start_address = main_cmd->entryoff
4823 + (text_sect->addr - text_sect->offset);
4824 return TRUE;
4825 }
4826 }
4827
4828 /* An object file has no start address, so do not fail if not found. */
4829 if (thr == NULL)
4830 return TRUE;
4831
4832 /* FIXME: create a subtarget hook ? */
4833 for (i = 0; i < thr->nflavours; i++)
4834 {
4835 if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_I386)
4836 && (thr->flavours[i].flavour == BFD_MACH_O_x86_THREAD_STATE32))
4837 {
4838 unsigned char buf[4];
4839
4840 if (bfd_seek (abfd, thr->flavours[i].offset + 40, SEEK_SET) != 0
4841 || bfd_bread (buf, 4, abfd) != 4)
4842 return FALSE;
4843
4844 abfd->start_address = bfd_h_get_32 (abfd, buf);
4845 }
4846 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC)
4847 && (thr->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE))
4848 {
4849 unsigned char buf[4];
4850
4851 if (bfd_seek (abfd, thr->flavours[i].offset + 0, SEEK_SET) != 0
4852 || bfd_bread (buf, 4, abfd) != 4)
4853 return FALSE;
4854
4855 abfd->start_address = bfd_h_get_32 (abfd, buf);
4856 }
4857 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC_64)
4858 && (thr->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE64))
4859 {
4860 unsigned char buf[8];
4861
4862 if (bfd_seek (abfd, thr->flavours[i].offset + 0, SEEK_SET) != 0
4863 || bfd_bread (buf, 8, abfd) != 8)
4864 return FALSE;
4865
4866 abfd->start_address = bfd_h_get_64 (abfd, buf);
4867 }
4868 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_X86_64)
4869 && (thr->flavours[i].flavour == BFD_MACH_O_x86_THREAD_STATE64))
4870 {
4871 unsigned char buf[8];
4872
4873 if (bfd_seek (abfd, thr->flavours[i].offset + (16 * 8), SEEK_SET) != 0
4874 || bfd_bread (buf, 8, abfd) != 8)
4875 return FALSE;
4876
4877 abfd->start_address = bfd_h_get_64 (abfd, buf);
4878 }
4879 }
4880
4881 return TRUE;
4882 }
4883
4884 bfd_boolean
bfd_mach_o_set_arch_mach(bfd * abfd,enum bfd_architecture arch,unsigned long machine)4885 bfd_mach_o_set_arch_mach (bfd *abfd,
4886 enum bfd_architecture arch,
4887 unsigned long machine)
4888 {
4889 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
4890
4891 /* If this isn't the right architecture for this backend, and this
4892 isn't the generic backend, fail. */
4893 if (arch != bed->arch
4894 && arch != bfd_arch_unknown
4895 && bed->arch != bfd_arch_unknown)
4896 return FALSE;
4897
4898 return bfd_default_set_arch_mach (abfd, arch, machine);
4899 }
4900
4901 static bfd_boolean
bfd_mach_o_scan(bfd * abfd,bfd_mach_o_header * header,bfd_mach_o_data_struct * mdata)4902 bfd_mach_o_scan (bfd *abfd,
4903 bfd_mach_o_header *header,
4904 bfd_mach_o_data_struct *mdata)
4905 {
4906 unsigned int i;
4907 enum bfd_architecture cputype;
4908 unsigned long cpusubtype;
4909 unsigned int hdrsize;
4910
4911 hdrsize = mach_o_wide_p (header) ?
4912 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
4913
4914 mdata->header = *header;
4915
4916 abfd->flags = abfd->flags & BFD_IN_MEMORY;
4917 switch (header->filetype)
4918 {
4919 case BFD_MACH_O_MH_OBJECT:
4920 abfd->flags |= HAS_RELOC;
4921 break;
4922 case BFD_MACH_O_MH_EXECUTE:
4923 abfd->flags |= EXEC_P;
4924 break;
4925 case BFD_MACH_O_MH_DYLIB:
4926 case BFD_MACH_O_MH_BUNDLE:
4927 abfd->flags |= DYNAMIC;
4928 break;
4929 }
4930
4931 abfd->tdata.mach_o_data = mdata;
4932
4933 bfd_mach_o_convert_architecture (header->cputype, header->cpusubtype,
4934 &cputype, &cpusubtype);
4935 if (cputype == bfd_arch_unknown)
4936 {
4937 (*_bfd_error_handler)
4938 (_("bfd_mach_o_scan: unknown architecture 0x%lx/0x%lx"),
4939 header->cputype, header->cpusubtype);
4940 return FALSE;
4941 }
4942
4943 bfd_set_arch_mach (abfd, cputype, cpusubtype);
4944
4945 if (header->ncmds != 0)
4946 {
4947 bfd_mach_o_load_command *cmd;
4948
4949 mdata->first_command = NULL;
4950 mdata->last_command = NULL;
4951
4952 cmd = bfd_alloc2 (abfd, header->ncmds, sizeof (bfd_mach_o_load_command));
4953 if (cmd == NULL)
4954 return FALSE;
4955
4956 for (i = 0; i < header->ncmds; i++)
4957 {
4958 bfd_mach_o_load_command *cur = &cmd[i];
4959
4960 bfd_mach_o_append_command (abfd, cur);
4961
4962 if (i == 0)
4963 cur->offset = hdrsize;
4964 else
4965 {
4966 bfd_mach_o_load_command *prev = &cmd[i - 1];
4967 cur->offset = prev->offset + prev->len;
4968 }
4969
4970 if (!bfd_mach_o_read_command (abfd, cur))
4971 return FALSE;
4972 }
4973 }
4974
4975 /* Sections should be flatten before scanning start address. */
4976 bfd_mach_o_flatten_sections (abfd);
4977 if (!bfd_mach_o_scan_start_address (abfd))
4978 return FALSE;
4979
4980 return TRUE;
4981 }
4982
4983 bfd_boolean
bfd_mach_o_mkobject_init(bfd * abfd)4984 bfd_mach_o_mkobject_init (bfd *abfd)
4985 {
4986 bfd_mach_o_data_struct *mdata = NULL;
4987
4988 mdata = bfd_zalloc (abfd, sizeof (bfd_mach_o_data_struct));
4989 if (mdata == NULL)
4990 return FALSE;
4991 abfd->tdata.mach_o_data = mdata;
4992
4993 mdata->header.magic = 0;
4994 mdata->header.cputype = 0;
4995 mdata->header.cpusubtype = 0;
4996 mdata->header.filetype = 0;
4997 mdata->header.ncmds = 0;
4998 mdata->header.sizeofcmds = 0;
4999 mdata->header.flags = 0;
5000 mdata->header.byteorder = BFD_ENDIAN_UNKNOWN;
5001 mdata->first_command = NULL;
5002 mdata->last_command = NULL;
5003 mdata->nsects = 0;
5004 mdata->sections = NULL;
5005 mdata->dyn_reloc_cache = NULL;
5006
5007 return TRUE;
5008 }
5009
5010 static bfd_boolean
bfd_mach_o_gen_mkobject(bfd * abfd)5011 bfd_mach_o_gen_mkobject (bfd *abfd)
5012 {
5013 bfd_mach_o_data_struct *mdata;
5014
5015 if (!bfd_mach_o_mkobject_init (abfd))
5016 return FALSE;
5017
5018 mdata = bfd_mach_o_get_data (abfd);
5019 mdata->header.magic = BFD_MACH_O_MH_MAGIC;
5020 mdata->header.cputype = 0;
5021 mdata->header.cpusubtype = 0;
5022 mdata->header.byteorder = abfd->xvec->byteorder;
5023 mdata->header.version = 1;
5024
5025 return TRUE;
5026 }
5027
5028 const bfd_target *
bfd_mach_o_header_p(bfd * abfd,file_ptr hdr_off,bfd_mach_o_filetype filetype,bfd_mach_o_cpu_type cputype)5029 bfd_mach_o_header_p (bfd *abfd,
5030 file_ptr hdr_off,
5031 bfd_mach_o_filetype filetype,
5032 bfd_mach_o_cpu_type cputype)
5033 {
5034 bfd_mach_o_header header;
5035 bfd_mach_o_data_struct *mdata;
5036
5037 if (!bfd_mach_o_read_header (abfd, hdr_off, &header))
5038 goto wrong;
5039
5040 if (! (header.byteorder == BFD_ENDIAN_BIG
5041 || header.byteorder == BFD_ENDIAN_LITTLE))
5042 {
5043 (*_bfd_error_handler) (_("unknown header byte-order value 0x%lx"),
5044 (unsigned long) header.byteorder);
5045 goto wrong;
5046 }
5047
5048 if (! ((header.byteorder == BFD_ENDIAN_BIG
5049 && abfd->xvec->byteorder == BFD_ENDIAN_BIG
5050 && abfd->xvec->header_byteorder == BFD_ENDIAN_BIG)
5051 || (header.byteorder == BFD_ENDIAN_LITTLE
5052 && abfd->xvec->byteorder == BFD_ENDIAN_LITTLE
5053 && abfd->xvec->header_byteorder == BFD_ENDIAN_LITTLE)))
5054 goto wrong;
5055
5056 /* Check cputype and filetype.
5057 In case of wildcard, do not accept magics that are handled by existing
5058 targets. */
5059 if (cputype)
5060 {
5061 if (header.cputype != cputype)
5062 goto wrong;
5063 }
5064 else
5065 {
5066 #ifndef BFD64
5067 /* Do not recognize 64 architectures if not configured for 64bit targets.
5068 This could happen only for generic targets. */
5069 if (mach_o_wide_p (&header))
5070 goto wrong;
5071 #endif
5072 }
5073
5074 if (filetype)
5075 {
5076 if (header.filetype != filetype)
5077 goto wrong;
5078 }
5079 else
5080 {
5081 switch (header.filetype)
5082 {
5083 case BFD_MACH_O_MH_CORE:
5084 /* Handled by core_p */
5085 goto wrong;
5086 default:
5087 break;
5088 }
5089 }
5090
5091 mdata = (bfd_mach_o_data_struct *) bfd_zalloc (abfd, sizeof (*mdata));
5092 if (mdata == NULL)
5093 goto fail;
5094 mdata->hdr_offset = hdr_off;
5095
5096 if (!bfd_mach_o_scan (abfd, &header, mdata))
5097 goto wrong;
5098
5099 return abfd->xvec;
5100
5101 wrong:
5102 bfd_set_error (bfd_error_wrong_format);
5103
5104 fail:
5105 return NULL;
5106 }
5107
5108 static const bfd_target *
bfd_mach_o_gen_object_p(bfd * abfd)5109 bfd_mach_o_gen_object_p (bfd *abfd)
5110 {
5111 return bfd_mach_o_header_p (abfd, 0, 0, 0);
5112 }
5113
5114 static const bfd_target *
bfd_mach_o_gen_core_p(bfd * abfd)5115 bfd_mach_o_gen_core_p (bfd *abfd)
5116 {
5117 return bfd_mach_o_header_p (abfd, 0, BFD_MACH_O_MH_CORE, 0);
5118 }
5119
5120 /* Return the base address of ABFD, ie the address at which the image is
5121 mapped. The possible initial pagezero is ignored. */
5122
5123 bfd_vma
bfd_mach_o_get_base_address(bfd * abfd)5124 bfd_mach_o_get_base_address (bfd *abfd)
5125 {
5126 bfd_mach_o_data_struct *mdata;
5127 bfd_mach_o_load_command *cmd;
5128
5129 /* Check for Mach-O. */
5130 if (!bfd_mach_o_valid (abfd))
5131 return 0;
5132 mdata = bfd_mach_o_get_data (abfd);
5133
5134 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5135 {
5136 if ((cmd->type == BFD_MACH_O_LC_SEGMENT
5137 || cmd->type == BFD_MACH_O_LC_SEGMENT_64))
5138 {
5139 struct bfd_mach_o_segment_command *segcmd = &cmd->command.segment;
5140
5141 if (segcmd->initprot != 0)
5142 return segcmd->vmaddr;
5143 }
5144 }
5145 return 0;
5146 }
5147
5148 typedef struct mach_o_fat_archentry
5149 {
5150 unsigned long cputype;
5151 unsigned long cpusubtype;
5152 unsigned long offset;
5153 unsigned long size;
5154 unsigned long align;
5155 } mach_o_fat_archentry;
5156
5157 typedef struct mach_o_fat_data_struct
5158 {
5159 unsigned long magic;
5160 unsigned long nfat_arch;
5161 mach_o_fat_archentry *archentries;
5162 } mach_o_fat_data_struct;
5163
5164 const bfd_target *
bfd_mach_o_fat_archive_p(bfd * abfd)5165 bfd_mach_o_fat_archive_p (bfd *abfd)
5166 {
5167 mach_o_fat_data_struct *adata = NULL;
5168 struct mach_o_fat_header_external hdr;
5169 unsigned long i;
5170
5171 if (bfd_seek (abfd, 0, SEEK_SET) != 0
5172 || bfd_bread (&hdr, sizeof (hdr), abfd) != sizeof (hdr))
5173 goto error;
5174
5175 adata = bfd_alloc (abfd, sizeof (mach_o_fat_data_struct));
5176 if (adata == NULL)
5177 goto error;
5178
5179 adata->magic = bfd_getb32 (hdr.magic);
5180 adata->nfat_arch = bfd_getb32 (hdr.nfat_arch);
5181 if (adata->magic != 0xcafebabe)
5182 goto error;
5183 /* Avoid matching Java bytecode files, which have the same magic number.
5184 In the Java bytecode file format this field contains the JVM version,
5185 which starts at 43.0. */
5186 if (adata->nfat_arch > 30)
5187 goto error;
5188
5189 adata->archentries =
5190 bfd_alloc2 (abfd, adata->nfat_arch, sizeof (mach_o_fat_archentry));
5191 if (adata->archentries == NULL)
5192 goto error;
5193
5194 for (i = 0; i < adata->nfat_arch; i++)
5195 {
5196 struct mach_o_fat_arch_external arch;
5197 if (bfd_bread (&arch, sizeof (arch), abfd) != sizeof (arch))
5198 goto error;
5199 adata->archentries[i].cputype = bfd_getb32 (arch.cputype);
5200 adata->archentries[i].cpusubtype = bfd_getb32 (arch.cpusubtype);
5201 adata->archentries[i].offset = bfd_getb32 (arch.offset);
5202 adata->archentries[i].size = bfd_getb32 (arch.size);
5203 adata->archentries[i].align = bfd_getb32 (arch.align);
5204 }
5205
5206 abfd->tdata.mach_o_fat_data = adata;
5207
5208 return abfd->xvec;
5209
5210 error:
5211 if (adata != NULL)
5212 bfd_release (abfd, adata);
5213 bfd_set_error (bfd_error_wrong_format);
5214 return NULL;
5215 }
5216
5217 /* Set the filename for a fat binary member ABFD, whose bfd architecture is
5218 ARCH_TYPE/ARCH_SUBTYPE and corresponding entry in header is ENTRY.
5219 Set arelt_data and origin fields too. */
5220
5221 static void
bfd_mach_o_fat_member_init(bfd * abfd,enum bfd_architecture arch_type,unsigned long arch_subtype,mach_o_fat_archentry * entry)5222 bfd_mach_o_fat_member_init (bfd *abfd,
5223 enum bfd_architecture arch_type,
5224 unsigned long arch_subtype,
5225 mach_o_fat_archentry *entry)
5226 {
5227 struct areltdata *areltdata;
5228 /* Create the member filename. Use ARCH_NAME. */
5229 const bfd_arch_info_type *ap = bfd_lookup_arch (arch_type, arch_subtype);
5230
5231 if (ap)
5232 {
5233 /* Use the architecture name if known. */
5234 abfd->filename = xstrdup (ap->printable_name);
5235 }
5236 else
5237 {
5238 /* Forge a uniq id. */
5239 const size_t namelen = 2 + 8 + 1 + 2 + 8 + 1;
5240 char *name = xmalloc (namelen);
5241 snprintf (name, namelen, "0x%lx-0x%lx",
5242 entry->cputype, entry->cpusubtype);
5243 abfd->filename = name;
5244 }
5245
5246 areltdata = bfd_zmalloc (sizeof (struct areltdata));
5247 areltdata->parsed_size = entry->size;
5248 abfd->arelt_data = areltdata;
5249 abfd->iostream = NULL;
5250 abfd->origin = entry->offset;
5251 }
5252
5253 bfd *
bfd_mach_o_fat_openr_next_archived_file(bfd * archive,bfd * prev)5254 bfd_mach_o_fat_openr_next_archived_file (bfd *archive, bfd *prev)
5255 {
5256 mach_o_fat_data_struct *adata;
5257 mach_o_fat_archentry *entry = NULL;
5258 unsigned long i;
5259 bfd *nbfd;
5260 enum bfd_architecture arch_type;
5261 unsigned long arch_subtype;
5262
5263 adata = (mach_o_fat_data_struct *) archive->tdata.mach_o_fat_data;
5264 BFD_ASSERT (adata != NULL);
5265
5266 /* Find index of previous entry. */
5267 if (prev == NULL)
5268 {
5269 /* Start at first one. */
5270 i = 0;
5271 }
5272 else
5273 {
5274 /* Find index of PREV. */
5275 for (i = 0; i < adata->nfat_arch; i++)
5276 {
5277 if (adata->archentries[i].offset == prev->origin)
5278 break;
5279 }
5280
5281 if (i == adata->nfat_arch)
5282 {
5283 /* Not found. */
5284 bfd_set_error (bfd_error_bad_value);
5285 return NULL;
5286 }
5287
5288 /* Get next entry. */
5289 i++;
5290 }
5291
5292 if (i >= adata->nfat_arch)
5293 {
5294 bfd_set_error (bfd_error_no_more_archived_files);
5295 return NULL;
5296 }
5297
5298 entry = &adata->archentries[i];
5299 nbfd = _bfd_new_bfd_contained_in (archive);
5300 if (nbfd == NULL)
5301 return NULL;
5302
5303 bfd_mach_o_convert_architecture (entry->cputype, entry->cpusubtype,
5304 &arch_type, &arch_subtype);
5305
5306 bfd_mach_o_fat_member_init (nbfd, arch_type, arch_subtype, entry);
5307
5308 bfd_set_arch_mach (nbfd, arch_type, arch_subtype);
5309
5310 return nbfd;
5311 }
5312
5313 /* Analogous to stat call. */
5314
5315 static int
bfd_mach_o_fat_stat_arch_elt(bfd * abfd,struct stat * buf)5316 bfd_mach_o_fat_stat_arch_elt (bfd *abfd, struct stat *buf)
5317 {
5318 if (abfd->arelt_data == NULL)
5319 {
5320 bfd_set_error (bfd_error_invalid_operation);
5321 return -1;
5322 }
5323
5324 buf->st_mtime = 0;
5325 buf->st_uid = 0;
5326 buf->st_gid = 0;
5327 buf->st_mode = 0644;
5328 buf->st_size = arelt_size (abfd);
5329
5330 return 0;
5331 }
5332
5333 /* If ABFD format is FORMAT and architecture is ARCH, return it.
5334 If ABFD is a fat image containing a member that corresponds to FORMAT
5335 and ARCH, returns it.
5336 In other case, returns NULL.
5337 This function allows transparent uses of fat images. */
5338
5339 bfd *
bfd_mach_o_fat_extract(bfd * abfd,bfd_format format,const bfd_arch_info_type * arch)5340 bfd_mach_o_fat_extract (bfd *abfd,
5341 bfd_format format,
5342 const bfd_arch_info_type *arch)
5343 {
5344 bfd *res;
5345 mach_o_fat_data_struct *adata;
5346 unsigned int i;
5347
5348 if (bfd_check_format (abfd, format))
5349 {
5350 if (bfd_get_arch_info (abfd) == arch)
5351 return abfd;
5352 return NULL;
5353 }
5354 if (!bfd_check_format (abfd, bfd_archive)
5355 || abfd->xvec != &mach_o_fat_vec)
5356 return NULL;
5357
5358 /* This is a Mach-O fat image. */
5359 adata = (mach_o_fat_data_struct *) abfd->tdata.mach_o_fat_data;
5360 BFD_ASSERT (adata != NULL);
5361
5362 for (i = 0; i < adata->nfat_arch; i++)
5363 {
5364 struct mach_o_fat_archentry *e = &adata->archentries[i];
5365 enum bfd_architecture cpu_type;
5366 unsigned long cpu_subtype;
5367
5368 bfd_mach_o_convert_architecture (e->cputype, e->cpusubtype,
5369 &cpu_type, &cpu_subtype);
5370 if (cpu_type != arch->arch || cpu_subtype != arch->mach)
5371 continue;
5372
5373 /* The architecture is found. */
5374 res = _bfd_new_bfd_contained_in (abfd);
5375 if (res == NULL)
5376 return NULL;
5377
5378 bfd_mach_o_fat_member_init (res, cpu_type, cpu_subtype, e);
5379
5380 if (bfd_check_format (res, format))
5381 {
5382 BFD_ASSERT (bfd_get_arch_info (res) == arch);
5383 return res;
5384 }
5385 bfd_close (res);
5386 return NULL;
5387 }
5388
5389 return NULL;
5390 }
5391
5392 int
bfd_mach_o_lookup_command(bfd * abfd,bfd_mach_o_load_command_type type,bfd_mach_o_load_command ** mcommand)5393 bfd_mach_o_lookup_command (bfd *abfd,
5394 bfd_mach_o_load_command_type type,
5395 bfd_mach_o_load_command **mcommand)
5396 {
5397 struct mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5398 struct bfd_mach_o_load_command *cmd;
5399 unsigned int num;
5400
5401 BFD_ASSERT (mdata != NULL);
5402 BFD_ASSERT (mcommand != NULL);
5403
5404 num = 0;
5405 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5406 {
5407 if (cmd->type != type)
5408 continue;
5409
5410 if (num == 0)
5411 *mcommand = cmd;
5412 num++;
5413 }
5414
5415 return num;
5416 }
5417
5418 unsigned long
bfd_mach_o_stack_addr(enum bfd_mach_o_cpu_type type)5419 bfd_mach_o_stack_addr (enum bfd_mach_o_cpu_type type)
5420 {
5421 switch (type)
5422 {
5423 case BFD_MACH_O_CPU_TYPE_MC680x0:
5424 return 0x04000000;
5425 case BFD_MACH_O_CPU_TYPE_MC88000:
5426 return 0xffffe000;
5427 case BFD_MACH_O_CPU_TYPE_POWERPC:
5428 return 0xc0000000;
5429 case BFD_MACH_O_CPU_TYPE_I386:
5430 return 0xc0000000;
5431 case BFD_MACH_O_CPU_TYPE_SPARC:
5432 return 0xf0000000;
5433 case BFD_MACH_O_CPU_TYPE_I860:
5434 return 0;
5435 case BFD_MACH_O_CPU_TYPE_HPPA:
5436 return 0xc0000000 - 0x04000000;
5437 default:
5438 return 0;
5439 }
5440 }
5441
5442 /* The following two tables should be kept, as far as possible, in order of
5443 most frequently used entries to optimize their use from gas. */
5444
5445 const bfd_mach_o_xlat_name bfd_mach_o_section_type_name[] =
5446 {
5447 { "regular", BFD_MACH_O_S_REGULAR},
5448 { "coalesced", BFD_MACH_O_S_COALESCED},
5449 { "zerofill", BFD_MACH_O_S_ZEROFILL},
5450 { "cstring_literals", BFD_MACH_O_S_CSTRING_LITERALS},
5451 { "4byte_literals", BFD_MACH_O_S_4BYTE_LITERALS},
5452 { "8byte_literals", BFD_MACH_O_S_8BYTE_LITERALS},
5453 { "16byte_literals", BFD_MACH_O_S_16BYTE_LITERALS},
5454 { "literal_pointers", BFD_MACH_O_S_LITERAL_POINTERS},
5455 { "mod_init_func_pointers", BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS},
5456 { "mod_fini_func_pointers", BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS},
5457 { "gb_zerofill", BFD_MACH_O_S_GB_ZEROFILL},
5458 { "interposing", BFD_MACH_O_S_INTERPOSING},
5459 { "dtrace_dof", BFD_MACH_O_S_DTRACE_DOF},
5460 { "non_lazy_symbol_pointers", BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS},
5461 { "lazy_symbol_pointers", BFD_MACH_O_S_LAZY_SYMBOL_POINTERS},
5462 { "symbol_stubs", BFD_MACH_O_S_SYMBOL_STUBS},
5463 { "lazy_dylib_symbol_pointers", BFD_MACH_O_S_LAZY_DYLIB_SYMBOL_POINTERS},
5464 { NULL, 0}
5465 };
5466
5467 const bfd_mach_o_xlat_name bfd_mach_o_section_attribute_name[] =
5468 {
5469 { "pure_instructions", BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS },
5470 { "some_instructions", BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS },
5471 { "loc_reloc", BFD_MACH_O_S_ATTR_LOC_RELOC },
5472 { "ext_reloc", BFD_MACH_O_S_ATTR_EXT_RELOC },
5473 { "debug", BFD_MACH_O_S_ATTR_DEBUG },
5474 { "live_support", BFD_MACH_O_S_ATTR_LIVE_SUPPORT },
5475 { "no_dead_strip", BFD_MACH_O_S_ATTR_NO_DEAD_STRIP },
5476 { "strip_static_syms", BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS },
5477 { "no_toc", BFD_MACH_O_S_ATTR_NO_TOC },
5478 { "self_modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
5479 { "modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
5480 { NULL, 0}
5481 };
5482
5483 /* Get the section type from NAME. Return 256 if NAME is unknown. */
5484
5485 unsigned int
bfd_mach_o_get_section_type_from_name(bfd * abfd,const char * name)5486 bfd_mach_o_get_section_type_from_name (bfd *abfd, const char *name)
5487 {
5488 const bfd_mach_o_xlat_name *x;
5489 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
5490
5491 for (x = bfd_mach_o_section_type_name; x->name; x++)
5492 if (strcmp (x->name, name) == 0)
5493 {
5494 /* We found it... does the target support it? */
5495 if (bed->bfd_mach_o_section_type_valid_for_target == NULL
5496 || bed->bfd_mach_o_section_type_valid_for_target (x->val))
5497 return x->val; /* OK. */
5498 else
5499 break; /* Not supported. */
5500 }
5501 /* Maximum section ID = 0xff. */
5502 return 256;
5503 }
5504
5505 /* Get the section attribute from NAME. Return -1 if NAME is unknown. */
5506
5507 unsigned int
bfd_mach_o_get_section_attribute_from_name(const char * name)5508 bfd_mach_o_get_section_attribute_from_name (const char *name)
5509 {
5510 const bfd_mach_o_xlat_name *x;
5511
5512 for (x = bfd_mach_o_section_attribute_name; x->name; x++)
5513 if (strcmp (x->name, name) == 0)
5514 return x->val;
5515 return (unsigned int)-1;
5516 }
5517
5518 int
bfd_mach_o_core_fetch_environment(bfd * abfd,unsigned char ** rbuf,unsigned int * rlen)5519 bfd_mach_o_core_fetch_environment (bfd *abfd,
5520 unsigned char **rbuf,
5521 unsigned int *rlen)
5522 {
5523 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5524 unsigned long stackaddr = bfd_mach_o_stack_addr (mdata->header.cputype);
5525 bfd_mach_o_load_command *cmd;
5526
5527 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5528 {
5529 bfd_mach_o_segment_command *seg;
5530
5531 if (cmd->type != BFD_MACH_O_LC_SEGMENT)
5532 continue;
5533
5534 seg = &cmd->command.segment;
5535
5536 if ((seg->vmaddr + seg->vmsize) == stackaddr)
5537 {
5538 unsigned long start = seg->fileoff;
5539 unsigned long end = seg->fileoff + seg->filesize;
5540 unsigned char *buf = bfd_malloc (1024);
5541 unsigned long size = 1024;
5542
5543 for (;;)
5544 {
5545 bfd_size_type nread = 0;
5546 unsigned long offset;
5547 int found_nonnull = 0;
5548
5549 if (size > (end - start))
5550 size = (end - start);
5551
5552 buf = bfd_realloc_or_free (buf, size);
5553 if (buf == NULL)
5554 return -1;
5555
5556 if (bfd_seek (abfd, end - size, SEEK_SET) != 0)
5557 {
5558 free (buf);
5559 return -1;
5560 }
5561
5562 nread = bfd_bread (buf, size, abfd);
5563
5564 if (nread != size)
5565 {
5566 free (buf);
5567 return -1;
5568 }
5569
5570 for (offset = 4; offset <= size; offset += 4)
5571 {
5572 unsigned long val;
5573
5574 val = *((unsigned long *) (buf + size - offset));
5575 if (! found_nonnull)
5576 {
5577 if (val != 0)
5578 found_nonnull = 1;
5579 }
5580 else if (val == 0x0)
5581 {
5582 unsigned long bottom;
5583 unsigned long top;
5584
5585 bottom = seg->fileoff + seg->filesize - offset;
5586 top = seg->fileoff + seg->filesize - 4;
5587 *rbuf = bfd_malloc (top - bottom);
5588 *rlen = top - bottom;
5589
5590 memcpy (*rbuf, buf + size - *rlen, *rlen);
5591 free (buf);
5592 return 0;
5593 }
5594 }
5595
5596 if (size == (end - start))
5597 break;
5598
5599 size *= 2;
5600 }
5601
5602 free (buf);
5603 }
5604 }
5605
5606 return -1;
5607 }
5608
5609 char *
bfd_mach_o_core_file_failing_command(bfd * abfd)5610 bfd_mach_o_core_file_failing_command (bfd *abfd)
5611 {
5612 unsigned char *buf = NULL;
5613 unsigned int len = 0;
5614 int ret;
5615
5616 ret = bfd_mach_o_core_fetch_environment (abfd, &buf, &len);
5617 if (ret < 0)
5618 return NULL;
5619
5620 return (char *) buf;
5621 }
5622
5623 int
bfd_mach_o_core_file_failing_signal(bfd * abfd ATTRIBUTE_UNUSED)5624 bfd_mach_o_core_file_failing_signal (bfd *abfd ATTRIBUTE_UNUSED)
5625 {
5626 return 0;
5627 }
5628
5629 static bfd_mach_o_uuid_command *
bfd_mach_o_lookup_uuid_command(bfd * abfd)5630 bfd_mach_o_lookup_uuid_command (bfd *abfd)
5631 {
5632 bfd_mach_o_load_command *uuid_cmd;
5633 int ncmd = bfd_mach_o_lookup_command (abfd, BFD_MACH_O_LC_UUID, &uuid_cmd);
5634 if (ncmd != 1)
5635 return FALSE;
5636 return &uuid_cmd->command.uuid;
5637 }
5638
5639 /* Return true if ABFD is a dSYM file and its UUID matches UUID_CMD. */
5640
5641 static bfd_boolean
bfd_mach_o_dsym_for_uuid_p(bfd * abfd,const bfd_mach_o_uuid_command * uuid_cmd)5642 bfd_mach_o_dsym_for_uuid_p (bfd *abfd, const bfd_mach_o_uuid_command *uuid_cmd)
5643 {
5644 bfd_mach_o_uuid_command *dsym_uuid_cmd;
5645
5646 BFD_ASSERT (abfd);
5647 BFD_ASSERT (uuid_cmd);
5648
5649 if (!bfd_check_format (abfd, bfd_object))
5650 return FALSE;
5651
5652 if (bfd_get_flavour (abfd) != bfd_target_mach_o_flavour
5653 || bfd_mach_o_get_data (abfd) == NULL
5654 || bfd_mach_o_get_data (abfd)->header.filetype != BFD_MACH_O_MH_DSYM)
5655 return FALSE;
5656
5657 dsym_uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd);
5658 if (dsym_uuid_cmd == NULL)
5659 return FALSE;
5660
5661 if (memcmp (uuid_cmd->uuid, dsym_uuid_cmd->uuid,
5662 sizeof (uuid_cmd->uuid)) != 0)
5663 return FALSE;
5664
5665 return TRUE;
5666 }
5667
5668 /* Find a BFD in DSYM_FILENAME which matches ARCH and UUID_CMD.
5669 The caller is responsible for closing the returned BFD object and
5670 its my_archive if the returned BFD is in a fat dSYM. */
5671
5672 static bfd *
bfd_mach_o_find_dsym(const char * dsym_filename,const bfd_mach_o_uuid_command * uuid_cmd,const bfd_arch_info_type * arch)5673 bfd_mach_o_find_dsym (const char *dsym_filename,
5674 const bfd_mach_o_uuid_command *uuid_cmd,
5675 const bfd_arch_info_type *arch)
5676 {
5677 bfd *base_dsym_bfd, *dsym_bfd;
5678
5679 BFD_ASSERT (uuid_cmd);
5680
5681 base_dsym_bfd = bfd_openr (dsym_filename, NULL);
5682 if (base_dsym_bfd == NULL)
5683 return NULL;
5684
5685 dsym_bfd = bfd_mach_o_fat_extract (base_dsym_bfd, bfd_object, arch);
5686 if (bfd_mach_o_dsym_for_uuid_p (dsym_bfd, uuid_cmd))
5687 return dsym_bfd;
5688
5689 bfd_close (dsym_bfd);
5690 if (base_dsym_bfd != dsym_bfd)
5691 bfd_close (base_dsym_bfd);
5692
5693 return NULL;
5694 }
5695
5696 /* Return a BFD created from a dSYM file for ABFD.
5697 The caller is responsible for closing the returned BFD object, its
5698 filename, and its my_archive if the returned BFD is in a fat dSYM. */
5699
5700 static bfd *
bfd_mach_o_follow_dsym(bfd * abfd)5701 bfd_mach_o_follow_dsym (bfd *abfd)
5702 {
5703 char *dsym_filename;
5704 bfd_mach_o_uuid_command *uuid_cmd;
5705 bfd *dsym_bfd, *base_bfd = abfd;
5706 const char *base_basename;
5707
5708 if (abfd == NULL || bfd_get_flavour (abfd) != bfd_target_mach_o_flavour)
5709 return NULL;
5710
5711 if (abfd->my_archive && !bfd_is_thin_archive (abfd->my_archive))
5712 base_bfd = abfd->my_archive;
5713 /* BFD may have been opened from a stream. */
5714 if (base_bfd->filename == NULL)
5715 {
5716 bfd_set_error (bfd_error_invalid_operation);
5717 return NULL;
5718 }
5719 base_basename = lbasename (base_bfd->filename);
5720
5721 uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd);
5722 if (uuid_cmd == NULL)
5723 return NULL;
5724
5725 /* TODO: We assume the DWARF file has the same as the binary's.
5726 It seems apple's GDB checks all files in the dSYM bundle directory.
5727 http://opensource.apple.com/source/gdb/gdb-1708/src/gdb/macosx/macosx-tdep.c
5728 */
5729 dsym_filename = (char *)bfd_malloc (strlen (base_bfd->filename)
5730 + strlen (dsym_subdir) + 1
5731 + strlen (base_basename) + 1);
5732 sprintf (dsym_filename, "%s%s/%s",
5733 base_bfd->filename, dsym_subdir, base_basename);
5734
5735 dsym_bfd = bfd_mach_o_find_dsym (dsym_filename, uuid_cmd,
5736 bfd_get_arch_info (abfd));
5737 if (dsym_bfd == NULL)
5738 free (dsym_filename);
5739
5740 return dsym_bfd;
5741 }
5742
5743 bfd_boolean
bfd_mach_o_find_nearest_line(bfd * abfd,asymbol ** symbols,asection * section,bfd_vma offset,const char ** filename_ptr,const char ** functionname_ptr,unsigned int * line_ptr,unsigned int * discriminator_ptr)5744 bfd_mach_o_find_nearest_line (bfd *abfd,
5745 asymbol **symbols,
5746 asection *section,
5747 bfd_vma offset,
5748 const char **filename_ptr,
5749 const char **functionname_ptr,
5750 unsigned int *line_ptr,
5751 unsigned int *discriminator_ptr)
5752 {
5753 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5754 if (mdata == NULL)
5755 return FALSE;
5756 switch (mdata->header.filetype)
5757 {
5758 case BFD_MACH_O_MH_OBJECT:
5759 break;
5760 case BFD_MACH_O_MH_EXECUTE:
5761 case BFD_MACH_O_MH_DYLIB:
5762 case BFD_MACH_O_MH_BUNDLE:
5763 case BFD_MACH_O_MH_KEXT_BUNDLE:
5764 if (mdata->dwarf2_find_line_info == NULL)
5765 {
5766 mdata->dsym_bfd = bfd_mach_o_follow_dsym (abfd);
5767 /* When we couldn't find dSYM for this binary, we look for
5768 the debug information in the binary itself. In this way,
5769 we won't try finding separated dSYM again because
5770 mdata->dwarf2_find_line_info will be filled. */
5771 if (! mdata->dsym_bfd)
5772 break;
5773 if (! _bfd_dwarf2_slurp_debug_info (abfd, mdata->dsym_bfd,
5774 dwarf_debug_sections, symbols,
5775 &mdata->dwarf2_find_line_info,
5776 FALSE))
5777 return FALSE;
5778 }
5779 break;
5780 default:
5781 return FALSE;
5782 }
5783 return _bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset,
5784 filename_ptr, functionname_ptr,
5785 line_ptr, discriminator_ptr,
5786 dwarf_debug_sections, 0,
5787 &mdata->dwarf2_find_line_info);
5788 }
5789
5790 bfd_boolean
bfd_mach_o_close_and_cleanup(bfd * abfd)5791 bfd_mach_o_close_and_cleanup (bfd *abfd)
5792 {
5793 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5794 if (bfd_get_format (abfd) == bfd_object && mdata != NULL)
5795 {
5796 _bfd_dwarf2_cleanup_debug_info (abfd, &mdata->dwarf2_find_line_info);
5797 bfd_mach_o_free_cached_info (abfd);
5798 if (mdata->dsym_bfd != NULL)
5799 {
5800 bfd *fat_bfd = mdata->dsym_bfd->my_archive;
5801 #if 0
5802 /* FIXME: PR 19435: This calculation to find the memory allocated by
5803 bfd_mach_o_follow_dsym for the filename does not always end up
5804 selecting the correct pointer. Unfortunately this problem is
5805 very hard to reproduce on a non Mach-O native system, so until it
5806 can be traced and fixed on such a system, this code will remain
5807 commented out. This does mean that there will be a memory leak,
5808 but it is small, and happens when we are closing down, so it
5809 should not matter too much. */
5810 char *dsym_filename = (char *)(fat_bfd
5811 ? fat_bfd->filename
5812 : mdata->dsym_bfd->filename);
5813 #endif
5814 bfd_close (mdata->dsym_bfd);
5815 mdata->dsym_bfd = NULL;
5816 if (fat_bfd)
5817 bfd_close (fat_bfd);
5818 #if 0
5819 free (dsym_filename);
5820 #endif
5821 }
5822 }
5823
5824 return _bfd_generic_close_and_cleanup (abfd);
5825 }
5826
bfd_mach_o_free_cached_info(bfd * abfd)5827 bfd_boolean bfd_mach_o_free_cached_info (bfd *abfd)
5828 {
5829 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5830 asection *asect;
5831 free (mdata->dyn_reloc_cache);
5832 mdata->dyn_reloc_cache = NULL;
5833 for (asect = abfd->sections; asect != NULL; asect = asect->next)
5834 {
5835 free (asect->relocation);
5836 asect->relocation = NULL;
5837 }
5838
5839 return TRUE;
5840 }
5841
5842 #define bfd_mach_o_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
5843 #define bfd_mach_o_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_lookup
5844
5845 #define bfd_mach_o_canonicalize_one_reloc NULL
5846 #define bfd_mach_o_swap_reloc_out NULL
5847 #define bfd_mach_o_print_thread NULL
5848 #define bfd_mach_o_tgt_seg_table NULL
5849 #define bfd_mach_o_section_type_valid_for_tgt NULL
5850
5851 #define TARGET_NAME mach_o_be_vec
5852 #define TARGET_STRING "mach-o-be"
5853 #define TARGET_ARCHITECTURE bfd_arch_unknown
5854 #define TARGET_PAGESIZE 1
5855 #define TARGET_BIG_ENDIAN 1
5856 #define TARGET_ARCHIVE 0
5857 #define TARGET_PRIORITY 1
5858 #include "mach-o-target.c"
5859
5860 #undef TARGET_NAME
5861 #undef TARGET_STRING
5862 #undef TARGET_ARCHITECTURE
5863 #undef TARGET_PAGESIZE
5864 #undef TARGET_BIG_ENDIAN
5865 #undef TARGET_ARCHIVE
5866 #undef TARGET_PRIORITY
5867
5868 #define TARGET_NAME mach_o_le_vec
5869 #define TARGET_STRING "mach-o-le"
5870 #define TARGET_ARCHITECTURE bfd_arch_unknown
5871 #define TARGET_PAGESIZE 1
5872 #define TARGET_BIG_ENDIAN 0
5873 #define TARGET_ARCHIVE 0
5874 #define TARGET_PRIORITY 1
5875
5876 #include "mach-o-target.c"
5877
5878 #undef TARGET_NAME
5879 #undef TARGET_STRING
5880 #undef TARGET_ARCHITECTURE
5881 #undef TARGET_PAGESIZE
5882 #undef TARGET_BIG_ENDIAN
5883 #undef TARGET_ARCHIVE
5884 #undef TARGET_PRIORITY
5885
5886 /* Not yet handled: creating an archive. */
5887 #define bfd_mach_o_mkarchive _bfd_noarchive_mkarchive
5888
5889 #define bfd_mach_o_close_and_cleanup bfd_true
5890
5891 /* Not used. */
5892 #define bfd_mach_o_generic_stat_arch_elt bfd_mach_o_fat_stat_arch_elt
5893 #define bfd_mach_o_openr_next_archived_file bfd_mach_o_fat_openr_next_archived_file
5894 #define bfd_mach_o_archive_p bfd_mach_o_fat_archive_p
5895
5896 #define TARGET_NAME mach_o_fat_vec
5897 #define TARGET_STRING "mach-o-fat"
5898 #define TARGET_ARCHITECTURE bfd_arch_unknown
5899 #define TARGET_PAGESIZE 1
5900 #define TARGET_BIG_ENDIAN 1
5901 #define TARGET_ARCHIVE 1
5902 #define TARGET_PRIORITY 0
5903
5904 #include "mach-o-target.c"
5905
5906 #undef TARGET_NAME
5907 #undef TARGET_STRING
5908 #undef TARGET_ARCHITECTURE
5909 #undef TARGET_PAGESIZE
5910 #undef TARGET_BIG_ENDIAN
5911 #undef TARGET_ARCHIVE
5912 #undef TARGET_PRIORITY
5913