Commit | Line | Data |
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70f80edf | 1 | /* OS ABI variant handling for GDB. |
533f1d8f | 2 | |
6aba47ca | 3 | Copyright (C) 2001, 2002, 2003, 2004, 2007 Free Software Foundation, Inc. |
70f80edf JT |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
70f80edf JT |
10 | (at your option) any later version. |
11 | ||
a9762ec7 | 12 | This program is distributed in the hope that it will be useful, |
70f80edf JT |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
a9762ec7 | 16 | |
70f80edf | 17 | You should have received a copy of the GNU General Public License |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
70f80edf JT |
19 | |
20 | #include "defs.h" | |
05816f70 MK |
21 | |
22 | #include "gdb_assert.h" | |
309367d4 | 23 | #include "gdb_string.h" |
05816f70 | 24 | |
70f80edf | 25 | #include "osabi.h" |
b00a8037 DJ |
26 | #include "arch-utils.h" |
27 | #include "gdbcmd.h" | |
28 | #include "command.h" | |
70f80edf JT |
29 | |
30 | #include "elf-bfd.h" | |
31 | ||
b00a8037 DJ |
32 | #ifndef GDB_OSABI_DEFAULT |
33 | #define GDB_OSABI_DEFAULT GDB_OSABI_UNKNOWN | |
34 | #endif | |
35 | ||
36 | /* State for the "set osabi" command. */ | |
37 | static enum { osabi_auto, osabi_default, osabi_user } user_osabi_state; | |
38 | static enum gdb_osabi user_selected_osabi; | |
39 | static const char *gdb_osabi_available_names[GDB_OSABI_INVALID + 3] = { | |
40 | "auto", | |
41 | "default", | |
42 | "none", | |
43 | NULL | |
44 | }; | |
45 | static const char *set_osabi_string; | |
70f80edf JT |
46 | |
47 | /* This table matches the indices assigned to enum gdb_osabi. Keep | |
48 | them in sync. */ | |
49 | static const char * const gdb_osabi_names[] = | |
50 | { | |
b00a8037 | 51 | "none", |
70f80edf JT |
52 | |
53 | "SVR4", | |
54 | "GNU/Hurd", | |
55 | "Solaris", | |
56 | "OSF/1", | |
57 | "GNU/Linux", | |
58 | "FreeBSD a.out", | |
59 | "FreeBSD ELF", | |
60 | "NetBSD a.out", | |
61 | "NetBSD ELF", | |
d33b9831 | 62 | "OpenBSD ELF", |
70f80edf | 63 | "Windows CE", |
1029b7fa | 64 | "DJGPP", |
b96d0a4e | 65 | "Irix", |
e64f66d1 | 66 | "Interix", |
a09a320d JB |
67 | "HP/UX ELF", |
68 | "HP/UX SOM", | |
70f80edf | 69 | |
83461b86 | 70 | "QNX Neutrino", |
70f80edf | 71 | |
1762d96d | 72 | "Cygwin", |
1f82754b | 73 | "AIX", |
1762d96d | 74 | |
70f80edf JT |
75 | "<invalid>" |
76 | }; | |
77 | ||
78 | const char * | |
79 | gdbarch_osabi_name (enum gdb_osabi osabi) | |
80 | { | |
81 | if (osabi >= GDB_OSABI_UNKNOWN && osabi < GDB_OSABI_INVALID) | |
82 | return gdb_osabi_names[osabi]; | |
83 | ||
84 | return gdb_osabi_names[GDB_OSABI_INVALID]; | |
85 | } | |
86 | ||
87 | /* Handler for a given architecture/OS ABI pair. There should be only | |
88 | one handler for a given OS ABI each architecture family. */ | |
89 | struct gdb_osabi_handler | |
90 | { | |
91 | struct gdb_osabi_handler *next; | |
05816f70 | 92 | const struct bfd_arch_info *arch_info; |
70f80edf JT |
93 | enum gdb_osabi osabi; |
94 | void (*init_osabi)(struct gdbarch_info, struct gdbarch *); | |
95 | }; | |
96 | ||
97 | static struct gdb_osabi_handler *gdb_osabi_handler_list; | |
98 | ||
99 | void | |
05816f70 MK |
100 | gdbarch_register_osabi (enum bfd_architecture arch, unsigned long machine, |
101 | enum gdb_osabi osabi, | |
70f80edf JT |
102 | void (*init_osabi)(struct gdbarch_info, |
103 | struct gdbarch *)) | |
104 | { | |
105 | struct gdb_osabi_handler **handler_p; | |
05816f70 | 106 | const struct bfd_arch_info *arch_info = bfd_lookup_arch (arch, machine); |
b00a8037 | 107 | const char **name_ptr; |
70f80edf JT |
108 | |
109 | /* Registering an OS ABI handler for "unknown" is not allowed. */ | |
110 | if (osabi == GDB_OSABI_UNKNOWN) | |
111 | { | |
112 | internal_error | |
113 | (__FILE__, __LINE__, | |
e2e0b3e5 | 114 | _("gdbarch_register_osabi: An attempt to register a handler for " |
70f80edf | 115 | "OS ABI \"%s\" for architecture %s was made. The handler will " |
e2e0b3e5 | 116 | "not be registered"), |
70f80edf | 117 | gdbarch_osabi_name (osabi), |
05816f70 | 118 | bfd_printable_arch_mach (arch, machine)); |
70f80edf JT |
119 | return; |
120 | } | |
121 | ||
05816f70 MK |
122 | gdb_assert (arch_info); |
123 | ||
70f80edf JT |
124 | for (handler_p = &gdb_osabi_handler_list; *handler_p != NULL; |
125 | handler_p = &(*handler_p)->next) | |
126 | { | |
05816f70 | 127 | if ((*handler_p)->arch_info == arch_info |
70f80edf JT |
128 | && (*handler_p)->osabi == osabi) |
129 | { | |
130 | internal_error | |
131 | (__FILE__, __LINE__, | |
e2e0b3e5 AC |
132 | _("gdbarch_register_osabi: A handler for OS ABI \"%s\" " |
133 | "has already been registered for architecture %s"), | |
70f80edf | 134 | gdbarch_osabi_name (osabi), |
05816f70 | 135 | arch_info->printable_name); |
70f80edf JT |
136 | /* If user wants to continue, override previous definition. */ |
137 | (*handler_p)->init_osabi = init_osabi; | |
138 | return; | |
139 | } | |
140 | } | |
141 | ||
142 | (*handler_p) | |
143 | = (struct gdb_osabi_handler *) xmalloc (sizeof (struct gdb_osabi_handler)); | |
144 | (*handler_p)->next = NULL; | |
05816f70 | 145 | (*handler_p)->arch_info = arch_info; |
70f80edf JT |
146 | (*handler_p)->osabi = osabi; |
147 | (*handler_p)->init_osabi = init_osabi; | |
b00a8037 DJ |
148 | |
149 | /* Add this OS ABI to the list of enum values for "set osabi", if it isn't | |
150 | already there. */ | |
151 | for (name_ptr = gdb_osabi_available_names; *name_ptr; name_ptr ++) | |
152 | { | |
153 | if (*name_ptr == gdbarch_osabi_name (osabi)) | |
154 | return; | |
155 | } | |
156 | *name_ptr++ = gdbarch_osabi_name (osabi); | |
157 | *name_ptr = NULL; | |
70f80edf JT |
158 | } |
159 | \f | |
160 | ||
161 | /* Sniffer to find the OS ABI for a given file's architecture and flavour. | |
162 | It is legal to have multiple sniffers for each arch/flavour pair, to | |
163 | disambiguate one OS's a.out from another, for example. The first sniffer | |
164 | to return something other than GDB_OSABI_UNKNOWN wins, so a sniffer should | |
165 | be careful to claim a file only if it knows for sure what it is. */ | |
166 | struct gdb_osabi_sniffer | |
167 | { | |
168 | struct gdb_osabi_sniffer *next; | |
169 | enum bfd_architecture arch; /* bfd_arch_unknown == wildcard */ | |
170 | enum bfd_flavour flavour; | |
171 | enum gdb_osabi (*sniffer)(bfd *); | |
172 | }; | |
173 | ||
174 | static struct gdb_osabi_sniffer *gdb_osabi_sniffer_list; | |
175 | ||
176 | void | |
177 | gdbarch_register_osabi_sniffer (enum bfd_architecture arch, | |
178 | enum bfd_flavour flavour, | |
179 | enum gdb_osabi (*sniffer_fn)(bfd *)) | |
180 | { | |
181 | struct gdb_osabi_sniffer *sniffer; | |
182 | ||
183 | sniffer = | |
184 | (struct gdb_osabi_sniffer *) xmalloc (sizeof (struct gdb_osabi_sniffer)); | |
185 | sniffer->arch = arch; | |
186 | sniffer->flavour = flavour; | |
187 | sniffer->sniffer = sniffer_fn; | |
188 | ||
189 | sniffer->next = gdb_osabi_sniffer_list; | |
190 | gdb_osabi_sniffer_list = sniffer; | |
191 | } | |
192 | \f | |
193 | ||
194 | enum gdb_osabi | |
195 | gdbarch_lookup_osabi (bfd *abfd) | |
196 | { | |
197 | struct gdb_osabi_sniffer *sniffer; | |
198 | enum gdb_osabi osabi, match; | |
199 | int match_specific; | |
200 | ||
b00a8037 DJ |
201 | /* If we aren't in "auto" mode, return the specified OS ABI. */ |
202 | if (user_osabi_state == osabi_user) | |
203 | return user_selected_osabi; | |
204 | ||
205 | /* If we don't have a binary, return the default OS ABI (if set) or | |
59a59f84 | 206 | unknown (otherwise). */ |
b00a8037 | 207 | if (abfd == NULL) |
59a59f84 | 208 | return GDB_OSABI_DEFAULT; |
4be87837 | 209 | |
70f80edf JT |
210 | match = GDB_OSABI_UNKNOWN; |
211 | match_specific = 0; | |
212 | ||
213 | for (sniffer = gdb_osabi_sniffer_list; sniffer != NULL; | |
214 | sniffer = sniffer->next) | |
215 | { | |
216 | if ((sniffer->arch == bfd_arch_unknown /* wildcard */ | |
217 | || sniffer->arch == bfd_get_arch (abfd)) | |
218 | && sniffer->flavour == bfd_get_flavour (abfd)) | |
219 | { | |
220 | osabi = (*sniffer->sniffer) (abfd); | |
221 | if (osabi < GDB_OSABI_UNKNOWN || osabi >= GDB_OSABI_INVALID) | |
222 | { | |
223 | internal_error | |
224 | (__FILE__, __LINE__, | |
e2e0b3e5 AC |
225 | _("gdbarch_lookup_osabi: invalid OS ABI (%d) from sniffer " |
226 | "for architecture %s flavour %d"), | |
70f80edf JT |
227 | (int) osabi, |
228 | bfd_printable_arch_mach (bfd_get_arch (abfd), 0), | |
229 | (int) bfd_get_flavour (abfd)); | |
230 | } | |
231 | else if (osabi != GDB_OSABI_UNKNOWN) | |
232 | { | |
233 | /* A specific sniffer always overrides a generic sniffer. | |
234 | Croak on multiple match if the two matches are of the | |
235 | same class. If the user wishes to continue, we'll use | |
236 | the first match. */ | |
237 | if (match != GDB_OSABI_UNKNOWN) | |
238 | { | |
239 | if ((match_specific && sniffer->arch != bfd_arch_unknown) | |
240 | || (!match_specific && sniffer->arch == bfd_arch_unknown)) | |
241 | { | |
242 | internal_error | |
243 | (__FILE__, __LINE__, | |
e2e0b3e5 | 244 | _("gdbarch_lookup_osabi: multiple %sspecific OS ABI " |
70f80edf | 245 | "match for architecture %s flavour %d: first " |
e2e0b3e5 | 246 | "match \"%s\", second match \"%s\""), |
70f80edf JT |
247 | match_specific ? "" : "non-", |
248 | bfd_printable_arch_mach (bfd_get_arch (abfd), 0), | |
249 | (int) bfd_get_flavour (abfd), | |
250 | gdbarch_osabi_name (match), | |
251 | gdbarch_osabi_name (osabi)); | |
252 | } | |
253 | else if (sniffer->arch != bfd_arch_unknown) | |
254 | { | |
255 | match = osabi; | |
256 | match_specific = 1; | |
257 | } | |
258 | } | |
259 | else | |
260 | { | |
261 | match = osabi; | |
262 | if (sniffer->arch != bfd_arch_unknown) | |
263 | match_specific = 1; | |
264 | } | |
265 | } | |
266 | } | |
267 | } | |
268 | ||
b00a8037 DJ |
269 | /* If we didn't find a match, but a default was specified at configure |
270 | time, return the default. */ | |
271 | if (GDB_OSABI_DEFAULT != GDB_OSABI_UNKNOWN && match == GDB_OSABI_UNKNOWN) | |
272 | return GDB_OSABI_DEFAULT; | |
273 | else | |
274 | return match; | |
70f80edf JT |
275 | } |
276 | ||
6cfae0bc JB |
277 | |
278 | /* Return non-zero if architecture A can run code written for | |
279 | architecture B. */ | |
280 | static int | |
281 | can_run_code_for (const struct bfd_arch_info *a, const struct bfd_arch_info *b) | |
282 | { | |
283 | /* BFD's 'A->compatible (A, B)' functions return zero if A and B are | |
284 | incompatible. But if they are compatible, it returns the 'more | |
285 | featureful' of the two arches. That is, if A can run code | |
286 | written for B, but B can't run code written for A, then it'll | |
287 | return A. | |
288 | ||
5f724446 AC |
289 | struct bfd_arch_info objects are singletons: that is, there's |
290 | supposed to be exactly one instance for a given machine. So you | |
291 | can tell whether two are equivalent by comparing pointers. */ | |
6cfae0bc JB |
292 | return (a == b || a->compatible (a, b) == a); |
293 | } | |
294 | ||
295 | ||
70f80edf | 296 | void |
4be87837 | 297 | gdbarch_init_osabi (struct gdbarch_info info, struct gdbarch *gdbarch) |
70f80edf | 298 | { |
05816f70 | 299 | struct gdb_osabi_handler *handler; |
70f80edf | 300 | |
4be87837 | 301 | if (info.osabi == GDB_OSABI_UNKNOWN) |
70f80edf | 302 | { |
01fc4e33 AC |
303 | /* Don't complain about an unknown OSABI. Assume the user knows |
304 | what they are doing. */ | |
70f80edf JT |
305 | return; |
306 | } | |
307 | ||
308 | for (handler = gdb_osabi_handler_list; handler != NULL; | |
309 | handler = handler->next) | |
310 | { | |
4be87837 | 311 | if (handler->osabi != info.osabi) |
05816f70 MK |
312 | continue; |
313 | ||
6cfae0bc JB |
314 | /* If the architecture described by ARCH_INFO can run code for |
315 | the architcture we registered the handler for, then the | |
316 | handler is applicable. Note, though, that if the handler is | |
317 | for an architecture that is a superset of ARCH_INFO, we can't | |
318 | use that --- it would be perfectly correct for it to install | |
319 | gdbarch methods that refer to registers / instructions / | |
320 | other facilities ARCH_INFO doesn't have. | |
05816f70 | 321 | |
6cfae0bc | 322 | NOTE: kettenis/20021027: There may be more than one machine |
05816f70 MK |
323 | type that is compatible with the desired machine type. Right |
324 | now we simply return the first match, which is fine for now. | |
325 | However, we might want to do something smarter in the future. */ | |
5f724446 AC |
326 | /* NOTE: cagney/2003-10-23: The code for "a can_run_code_for b" |
327 | is implemented using BFD's compatible method (a->compatible | |
328 | (b) == a -- the lowest common denominator between a and b is | |
329 | a). That method's definition of compatible may not be as you | |
ce2826aa | 330 | expect. For instance the test "amd64 can run code for i386" |
5f724446 | 331 | (or more generally "64-bit ISA can run code for the 32-bit |
ce2826aa AC |
332 | ISA"). BFD doesn't normally consider 32-bit and 64-bit |
333 | "compatible" so it doesn't succeed. */ | |
931758af | 334 | if (can_run_code_for (info.bfd_arch_info, handler->arch_info)) |
70f80edf JT |
335 | { |
336 | (*handler->init_osabi) (info, gdbarch); | |
337 | return; | |
338 | } | |
339 | } | |
340 | ||
e481341f JB |
341 | warning |
342 | ("A handler for the OS ABI \"%s\" is not built into this configuration\n" | |
343 | "of GDB. Attempting to continue with the default %s settings.\n", | |
344 | gdbarch_osabi_name (info.osabi), | |
345 | info.bfd_arch_info->printable_name); | |
70f80edf JT |
346 | } |
347 | \f | |
a49d618c MK |
348 | /* Limit on the amount of data to be read. */ |
349 | #define MAX_NOTESZ 128 | |
350 | ||
351 | /* Return non-zero if NOTE matches NAME, DESCSZ and TYPE. */ | |
352 | ||
353 | static int | |
354 | check_note (bfd *abfd, asection *sect, const char *note, | |
355 | const char *name, unsigned long descsz, unsigned long type) | |
356 | { | |
357 | unsigned long notesz; | |
358 | ||
359 | /* Calculate the size of this note. */ | |
360 | notesz = strlen (name) + 1; | |
361 | notesz = ((notesz + 3) & ~3); | |
362 | notesz += descsz; | |
363 | notesz = ((notesz + 3) & ~3); | |
364 | ||
365 | /* If this assertion triggers, increase MAX_NOTESZ. */ | |
366 | gdb_assert (notesz <= MAX_NOTESZ); | |
367 | ||
368 | /* Check whether SECT is big enough to comtain the complete note. */ | |
369 | if (notesz > bfd_section_size (abfd, sect)) | |
370 | return 0; | |
371 | ||
372 | /* Check the note name. */ | |
373 | if (bfd_h_get_32 (abfd, note) != (strlen (name) + 1) | |
374 | || strcmp (note + 12, name) != 0) | |
375 | return 0; | |
376 | ||
377 | /* Check the descriptor size. */ | |
378 | if (bfd_h_get_32 (abfd, note + 4) != descsz) | |
379 | return 0; | |
380 | ||
381 | /* Check the note type. */ | |
382 | if (bfd_h_get_32 (abfd, note + 8) != type) | |
383 | return 0; | |
384 | ||
385 | return 1; | |
386 | } | |
70f80edf JT |
387 | |
388 | /* Generic sniffer for ELF flavoured files. */ | |
389 | ||
390 | void | |
391 | generic_elf_osabi_sniff_abi_tag_sections (bfd *abfd, asection *sect, void *obj) | |
392 | { | |
a49d618c | 393 | enum gdb_osabi *osabi = obj; |
70f80edf JT |
394 | const char *name; |
395 | unsigned int sectsize; | |
a49d618c | 396 | char *note; |
70f80edf JT |
397 | |
398 | name = bfd_get_section_name (abfd, sect); | |
399 | sectsize = bfd_section_size (abfd, sect); | |
400 | ||
a49d618c MK |
401 | /* Limit the amount of data to read. */ |
402 | if (sectsize > MAX_NOTESZ) | |
403 | sectsize = MAX_NOTESZ; | |
70f80edf | 404 | |
a49d618c MK |
405 | note = alloca (sectsize); |
406 | bfd_get_section_contents (abfd, sect, note, 0, sectsize); | |
70f80edf | 407 | |
a49d618c MK |
408 | /* .note.ABI-tag notes, used by GNU/Linux and FreeBSD. */ |
409 | if (strcmp (name, ".note.ABI-tag") == 0) | |
410 | { | |
411 | /* GNU. */ | |
412 | if (check_note (abfd, sect, note, "GNU", 16, NT_GNU_ABI_TAG)) | |
70f80edf | 413 | { |
a49d618c | 414 | unsigned int abi_tag = bfd_h_get_32 (abfd, note + 16); |
70f80edf | 415 | |
a49d618c | 416 | switch (abi_tag) |
70f80edf JT |
417 | { |
418 | case GNU_ABI_TAG_LINUX: | |
a49d618c | 419 | *osabi = GDB_OSABI_LINUX; |
70f80edf JT |
420 | break; |
421 | ||
422 | case GNU_ABI_TAG_HURD: | |
a49d618c | 423 | *osabi = GDB_OSABI_HURD; |
70f80edf JT |
424 | break; |
425 | ||
426 | case GNU_ABI_TAG_SOLARIS: | |
a49d618c | 427 | *osabi = GDB_OSABI_SOLARIS; |
70f80edf JT |
428 | break; |
429 | ||
261de166 | 430 | case GNU_ABI_TAG_FREEBSD: |
a49d618c | 431 | *osabi = GDB_OSABI_FREEBSD_ELF; |
261de166 | 432 | break; |
a49d618c | 433 | |
261de166 | 434 | case GNU_ABI_TAG_NETBSD: |
a49d618c | 435 | *osabi = GDB_OSABI_NETBSD_ELF; |
261de166 | 436 | break; |
a49d618c | 437 | |
70f80edf | 438 | default: |
e2e0b3e5 AC |
439 | internal_error (__FILE__, __LINE__, _("\ |
440 | generic_elf_osabi_sniff_abi_tag_sections: unknown OS number %d"), | |
a49d618c | 441 | abi_tag); |
70f80edf JT |
442 | } |
443 | return; | |
444 | } | |
a49d618c MK |
445 | |
446 | /* FreeBSD. */ | |
447 | if (check_note (abfd, sect, note, "FreeBSD", 4, NT_FREEBSD_ABI_TAG)) | |
70f80edf | 448 | { |
a49d618c MK |
449 | /* There is no need to check the version yet. */ |
450 | *osabi = GDB_OSABI_FREEBSD_ELF; | |
451 | return; | |
70f80edf | 452 | } |
a49d618c | 453 | |
70f80edf JT |
454 | return; |
455 | } | |
a49d618c | 456 | |
70f80edf | 457 | /* .note.netbsd.ident notes, used by NetBSD. */ |
a49d618c MK |
458 | if (strcmp (name, ".note.netbsd.ident") == 0 |
459 | && check_note (abfd, sect, note, "NetBSD", 4, NT_NETBSD_IDENT)) | |
70f80edf | 460 | { |
a49d618c MK |
461 | /* There is no need to check the version yet. */ |
462 | *osabi = GDB_OSABI_NETBSD_ELF; | |
70f80edf JT |
463 | return; |
464 | } | |
597684c5 | 465 | |
642d8300 MK |
466 | /* .note.openbsd.ident notes, used by OpenBSD. */ |
467 | if (strcmp (name, ".note.openbsd.ident") == 0 | |
468 | && check_note (abfd, sect, note, "OpenBSD", 4, NT_OPENBSD_IDENT)) | |
469 | { | |
470 | /* There is no need to check the version yet. */ | |
471 | *osabi = GDB_OSABI_OPENBSD_ELF; | |
472 | return; | |
473 | } | |
474 | ||
597684c5 | 475 | /* .note.netbsdcore.procinfo notes, used by NetBSD. */ |
a49d618c | 476 | if (strcmp (name, ".note.netbsdcore.procinfo") == 0) |
597684c5 | 477 | { |
a49d618c | 478 | *osabi = GDB_OSABI_NETBSD_ELF; |
597684c5 MK |
479 | return; |
480 | } | |
70f80edf JT |
481 | } |
482 | ||
483 | static enum gdb_osabi | |
484 | generic_elf_osabi_sniffer (bfd *abfd) | |
485 | { | |
486 | unsigned int elfosabi; | |
487 | enum gdb_osabi osabi = GDB_OSABI_UNKNOWN; | |
488 | ||
489 | elfosabi = elf_elfheader (abfd)->e_ident[EI_OSABI]; | |
490 | ||
491 | switch (elfosabi) | |
492 | { | |
493 | case ELFOSABI_NONE: | |
533f1d8f MK |
494 | /* When the EI_OSABI field in the ELF header is ELFOSABI_NONE |
495 | (0), then the ELF structures in the file are conforming to | |
496 | the base specification for that machine (there are no | |
497 | OS-specific extensions). In order to determine the real OS | |
498 | in use we must look for OS-specific notes. */ | |
70f80edf JT |
499 | bfd_map_over_sections (abfd, |
500 | generic_elf_osabi_sniff_abi_tag_sections, | |
501 | &osabi); | |
502 | break; | |
503 | ||
504 | case ELFOSABI_FREEBSD: | |
505 | osabi = GDB_OSABI_FREEBSD_ELF; | |
506 | break; | |
507 | ||
508 | case ELFOSABI_NETBSD: | |
509 | osabi = GDB_OSABI_NETBSD_ELF; | |
510 | break; | |
511 | ||
512 | case ELFOSABI_LINUX: | |
513 | osabi = GDB_OSABI_LINUX; | |
514 | break; | |
515 | ||
516 | case ELFOSABI_HURD: | |
517 | osabi = GDB_OSABI_HURD; | |
518 | break; | |
519 | ||
520 | case ELFOSABI_SOLARIS: | |
521 | osabi = GDB_OSABI_SOLARIS; | |
522 | break; | |
a09a320d JB |
523 | |
524 | case ELFOSABI_HPUX: | |
533f1d8f MK |
525 | /* For some reason the default value for the EI_OSABI field is |
526 | ELFOSABI_HPUX for all PA-RISC targets (with the exception of | |
527 | GNU/Linux). We use HP-UX ELF as the default, but let any | |
528 | OS-specific notes override this. */ | |
a09a320d | 529 | osabi = GDB_OSABI_HPUX_ELF; |
533f1d8f MK |
530 | bfd_map_over_sections (abfd, |
531 | generic_elf_osabi_sniff_abi_tag_sections, | |
532 | &osabi); | |
a09a320d | 533 | break; |
70f80edf JT |
534 | } |
535 | ||
bb21884d MK |
536 | if (osabi == GDB_OSABI_UNKNOWN) |
537 | { | |
538 | /* The FreeBSD folks have been naughty; they stored the string | |
539 | "FreeBSD" in the padding of the e_ident field of the ELF | |
540 | header to "brand" their ELF binaries in FreeBSD 3.x. */ | |
1731e543 | 541 | if (memcmp (&elf_elfheader (abfd)->e_ident[8], |
6062517a | 542 | "FreeBSD", sizeof ("FreeBSD")) == 0) |
bb21884d MK |
543 | osabi = GDB_OSABI_FREEBSD_ELF; |
544 | } | |
545 | ||
70f80edf JT |
546 | return osabi; |
547 | } | |
548 | \f | |
b00a8037 DJ |
549 | static void |
550 | set_osabi (char *args, int from_tty, struct cmd_list_element *c) | |
551 | { | |
552 | struct gdbarch_info info; | |
70f80edf | 553 | |
b00a8037 DJ |
554 | if (strcmp (set_osabi_string, "auto") == 0) |
555 | user_osabi_state = osabi_auto; | |
556 | else if (strcmp (set_osabi_string, "default") == 0) | |
557 | { | |
558 | user_selected_osabi = GDB_OSABI_DEFAULT; | |
559 | user_osabi_state = osabi_user; | |
560 | } | |
561 | else if (strcmp (set_osabi_string, "none") == 0) | |
562 | { | |
563 | user_selected_osabi = GDB_OSABI_UNKNOWN; | |
564 | user_osabi_state = osabi_user; | |
565 | } | |
566 | else | |
567 | { | |
568 | int i; | |
569 | for (i = 1; i < GDB_OSABI_INVALID; i++) | |
570 | if (strcmp (set_osabi_string, gdbarch_osabi_name (i)) == 0) | |
571 | { | |
572 | user_selected_osabi = i; | |
573 | user_osabi_state = osabi_user; | |
574 | break; | |
575 | } | |
576 | if (i == GDB_OSABI_INVALID) | |
577 | internal_error (__FILE__, __LINE__, | |
e2e0b3e5 | 578 | _("Invalid OS ABI \"%s\" passed to command handler."), |
b00a8037 DJ |
579 | set_osabi_string); |
580 | } | |
581 | ||
582 | /* NOTE: At some point (true multiple architectures) we'll need to be more | |
583 | graceful here. */ | |
584 | gdbarch_info_init (&info); | |
585 | if (! gdbarch_update_p (info)) | |
e2e0b3e5 | 586 | internal_error (__FILE__, __LINE__, _("Updating OS ABI failed.")); |
b00a8037 DJ |
587 | } |
588 | ||
b9362cc7 | 589 | static void |
7ab04401 AC |
590 | show_osabi (struct ui_file *file, int from_tty, struct cmd_list_element *c, |
591 | const char *value) | |
b00a8037 DJ |
592 | { |
593 | if (user_osabi_state == osabi_auto) | |
7ab04401 AC |
594 | fprintf_filtered (file, |
595 | _("The current OS ABI is \"auto\" (currently \"%s\").\n"), | |
596 | gdbarch_osabi_name (gdbarch_osabi (current_gdbarch))); | |
b00a8037 | 597 | else |
7ab04401 AC |
598 | fprintf_filtered (file, _("The current OS ABI is \"%s\".\n"), |
599 | gdbarch_osabi_name (user_selected_osabi)); | |
b00a8037 DJ |
600 | |
601 | if (GDB_OSABI_DEFAULT != GDB_OSABI_UNKNOWN) | |
7ab04401 AC |
602 | fprintf_filtered (file, _("The default OS ABI is \"%s\".\n"), |
603 | gdbarch_osabi_name (GDB_OSABI_DEFAULT)); | |
b00a8037 DJ |
604 | } |
605 | \f | |
b9362cc7 AC |
606 | extern initialize_file_ftype _initialize_gdb_osabi; /* -Wmissing-prototype */ |
607 | ||
70f80edf JT |
608 | void |
609 | _initialize_gdb_osabi (void) | |
610 | { | |
b00a8037 DJ |
611 | struct cmd_list_element *c; |
612 | ||
70f80edf JT |
613 | if (strcmp (gdb_osabi_names[GDB_OSABI_INVALID], "<invalid>") != 0) |
614 | internal_error | |
615 | (__FILE__, __LINE__, | |
e2e0b3e5 | 616 | _("_initialize_gdb_osabi: gdb_osabi_names[] is inconsistent")); |
70f80edf JT |
617 | |
618 | /* Register a generic sniffer for ELF flavoured files. */ | |
619 | gdbarch_register_osabi_sniffer (bfd_arch_unknown, | |
620 | bfd_target_elf_flavour, | |
621 | generic_elf_osabi_sniffer); | |
b00a8037 | 622 | |
b00a8037 | 623 | /* Register the "set osabi" command. */ |
7ab04401 AC |
624 | add_setshow_enum_cmd ("osabi", class_support, gdb_osabi_available_names, |
625 | &set_osabi_string, _("\ | |
626 | Set OS ABI of target."), _("\ | |
627 | Show OS ABI of target."), NULL, | |
628 | set_osabi, | |
629 | show_osabi, | |
630 | &setlist, &showlist); | |
b00a8037 | 631 | user_osabi_state = osabi_auto; |
70f80edf | 632 | } |