Commit | Line | Data |
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c0e8c252 | 1 | /* Dynamic architecture support for GDB, the GNU debugger. |
f4f9705a | 2 | |
6aba47ca | 3 | Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 |
22a44745 | 4 | Free Software Foundation, Inc. |
c0e8c252 AC |
5 | |
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 10 | the Free Software Foundation; either version 3 of the License, or |
c0e8c252 AC |
11 | (at your option) any later version. |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c0e8c252 AC |
20 | |
21 | #include "defs.h" | |
22 | ||
fb6ecb0f | 23 | #include "arch-utils.h" |
192cb3d4 | 24 | #include "buildsym.h" |
c0e8c252 AC |
25 | #include "gdbcmd.h" |
26 | #include "inferior.h" /* enum CALL_DUMMY_LOCATION et.al. */ | |
5f8a3188 | 27 | #include "gdb_string.h" |
fbec36e2 | 28 | #include "regcache.h" |
39d4ef09 | 29 | #include "gdb_assert.h" |
4182591f | 30 | #include "sim-regno.h" |
750eb019 | 31 | #include "gdbcore.h" |
bf922ad9 | 32 | #include "osabi.h" |
424163ea | 33 | #include "target-descriptions.h" |
bf922ad9 | 34 | |
1ba607ad AC |
35 | #include "version.h" |
36 | ||
f0d4cc9e AC |
37 | #include "floatformat.h" |
38 | ||
1fd35568 | 39 | |
4182591f AC |
40 | int |
41 | legacy_register_sim_regno (int regnum) | |
42 | { | |
43 | /* Only makes sense to supply raw registers. */ | |
f57d151a | 44 | gdb_assert (regnum >= 0 && regnum < gdbarch_num_regs (current_gdbarch)); |
4182591f AC |
45 | /* NOTE: cagney/2002-05-13: The old code did it this way and it is |
46 | suspected that some GDB/SIM combinations may rely on this | |
47 | behavour. The default should be one2one_register_sim_regno | |
48 | (below). */ | |
c9f4d572 UW |
49 | if (gdbarch_register_name (current_gdbarch, regnum) != NULL |
50 | && gdbarch_register_name (current_gdbarch, regnum)[0] != '\0') | |
4182591f AC |
51 | return regnum; |
52 | else | |
53 | return LEGACY_SIM_REGNO_IGNORE; | |
54 | } | |
55 | ||
bdcd319a | 56 | CORE_ADDR |
52f729a7 | 57 | generic_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc) |
bdcd319a CV |
58 | { |
59 | return 0; | |
60 | } | |
61 | ||
dea0c52f | 62 | CORE_ADDR |
4c8c40e6 | 63 | generic_skip_solib_resolver (struct gdbarch *gdbarch, CORE_ADDR pc) |
dea0c52f MK |
64 | { |
65 | return 0; | |
66 | } | |
67 | ||
d50355b6 MS |
68 | int |
69 | generic_in_solib_return_trampoline (CORE_ADDR pc, char *name) | |
70 | { | |
71 | return 0; | |
72 | } | |
73 | ||
c12260ac CV |
74 | int |
75 | generic_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc) | |
76 | { | |
77 | return 0; | |
78 | } | |
79 | ||
4d1e7dd1 | 80 | /* Helper functions for gdbarch_inner_than */ |
3339cf8b AC |
81 | |
82 | int | |
fba45db2 | 83 | core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs) |
3339cf8b AC |
84 | { |
85 | return (lhs < rhs); | |
86 | } | |
87 | ||
88 | int | |
fba45db2 | 89 | core_addr_greaterthan (CORE_ADDR lhs, CORE_ADDR rhs) |
3339cf8b AC |
90 | { |
91 | return (lhs > rhs); | |
92 | } | |
93 | ||
193e3b1a AC |
94 | /* Misc helper functions for targets. */ |
95 | ||
f517ea4e | 96 | CORE_ADDR |
875e1767 | 97 | core_addr_identity (CORE_ADDR addr) |
f517ea4e PS |
98 | { |
99 | return addr; | |
100 | } | |
101 | ||
e2d0e7eb AC |
102 | CORE_ADDR |
103 | convert_from_func_ptr_addr_identity (struct gdbarch *gdbarch, CORE_ADDR addr, | |
104 | struct target_ops *targ) | |
105 | { | |
106 | return addr; | |
107 | } | |
108 | ||
88c72b7d AC |
109 | int |
110 | no_op_reg_to_regnum (int reg) | |
111 | { | |
112 | return reg; | |
113 | } | |
114 | ||
a2cf933a EZ |
115 | void |
116 | default_elf_make_msymbol_special (asymbol *sym, struct minimal_symbol *msym) | |
117 | { | |
118 | return; | |
119 | } | |
120 | ||
121 | void | |
122 | default_coff_make_msymbol_special (int val, struct minimal_symbol *msym) | |
123 | { | |
124 | return; | |
125 | } | |
126 | ||
01fb7433 AC |
127 | int |
128 | cannot_register_not (int regnum) | |
129 | { | |
130 | return 0; | |
131 | } | |
39d4ef09 AC |
132 | |
133 | /* Legacy version of target_virtual_frame_pointer(). Assumes that | |
064f5156 | 134 | there is an gdbarch_deprecated_fp_regnum and that it is the same, cooked or |
0ba6dca9 | 135 | raw. */ |
39d4ef09 AC |
136 | |
137 | void | |
138 | legacy_virtual_frame_pointer (CORE_ADDR pc, | |
139 | int *frame_regnum, | |
140 | LONGEST *frame_offset) | |
141 | { | |
20bcf01c AC |
142 | /* FIXME: cagney/2002-09-13: This code is used when identifying the |
143 | frame pointer of the current PC. It is assuming that a single | |
144 | register and an offset can determine this. I think it should | |
145 | instead generate a byte code expression as that would work better | |
146 | with things like Dwarf2's CFI. */ | |
064f5156 UW |
147 | if (gdbarch_deprecated_fp_regnum (current_gdbarch) >= 0 |
148 | && gdbarch_deprecated_fp_regnum (current_gdbarch) | |
149 | < gdbarch_num_regs (current_gdbarch)) | |
150 | *frame_regnum = gdbarch_deprecated_fp_regnum (current_gdbarch); | |
3e8c568d UW |
151 | else if (gdbarch_sp_regnum (current_gdbarch) >= 0 |
152 | && gdbarch_sp_regnum (current_gdbarch) | |
153 | < gdbarch_num_regs (current_gdbarch)) | |
154 | *frame_regnum = gdbarch_sp_regnum (current_gdbarch); | |
20bcf01c AC |
155 | else |
156 | /* Should this be an internal error? I guess so, it is reflecting | |
157 | an architectural limitation in the current design. */ | |
edefbb7c | 158 | internal_error (__FILE__, __LINE__, _("No virtual frame pointer available")); |
39d4ef09 AC |
159 | *frame_offset = 0; |
160 | } | |
46cd78fb | 161 | |
d7bd68ca | 162 | \f |
13d01224 | 163 | int |
a1f4a1b6 | 164 | generic_convert_register_p (int regnum, struct type *type) |
13d01224 | 165 | { |
9730f241 | 166 | return 0; |
13d01224 AC |
167 | } |
168 | ||
192cb3d4 MK |
169 | int |
170 | default_stabs_argument_has_addr (struct gdbarch *gdbarch, struct type *type) | |
171 | { | |
192cb3d4 MK |
172 | return 0; |
173 | } | |
174 | ||
3ca64954 RC |
175 | int |
176 | generic_instruction_nullified (struct gdbarch *gdbarch, | |
177 | struct regcache *regcache) | |
178 | { | |
179 | return 0; | |
180 | } | |
181 | ||
123dc839 DJ |
182 | int |
183 | default_remote_register_number (struct gdbarch *gdbarch, | |
184 | int regno) | |
185 | { | |
186 | return regno; | |
187 | } | |
188 | ||
01fb7433 | 189 | \f |
b4a20239 AC |
190 | /* Functions to manipulate the endianness of the target. */ |
191 | ||
7a107747 | 192 | static int target_byte_order_user = BFD_ENDIAN_UNKNOWN; |
b4a20239 | 193 | |
53904c9e AC |
194 | static const char endian_big[] = "big"; |
195 | static const char endian_little[] = "little"; | |
196 | static const char endian_auto[] = "auto"; | |
197 | static const char *endian_enum[] = | |
b4a20239 AC |
198 | { |
199 | endian_big, | |
200 | endian_little, | |
201 | endian_auto, | |
202 | NULL, | |
203 | }; | |
53904c9e | 204 | static const char *set_endian_string; |
b4a20239 | 205 | |
b6d373df DJ |
206 | enum bfd_endian |
207 | selected_byte_order (void) | |
208 | { | |
209 | if (target_byte_order_user != BFD_ENDIAN_UNKNOWN) | |
0d20ae72 | 210 | return gdbarch_byte_order (current_gdbarch); |
b6d373df DJ |
211 | else |
212 | return BFD_ENDIAN_UNKNOWN; | |
213 | } | |
214 | ||
b4a20239 AC |
215 | /* Called by ``show endian''. */ |
216 | ||
217 | static void | |
7ab04401 AC |
218 | show_endian (struct ui_file *file, int from_tty, struct cmd_list_element *c, |
219 | const char *value) | |
b4a20239 | 220 | { |
7b6b9e83 | 221 | if (target_byte_order_user == BFD_ENDIAN_UNKNOWN) |
0d20ae72 | 222 | if (gdbarch_byte_order (current_gdbarch) == BFD_ENDIAN_BIG) |
7ab04401 AC |
223 | fprintf_unfiltered (file, _("The target endianness is set automatically " |
224 | "(currently big endian)\n")); | |
edefbb7c | 225 | else |
7ab04401 | 226 | fprintf_unfiltered (file, _("The target endianness is set automatically " |
edefbb7c | 227 | "(currently little endian)\n")); |
b4a20239 | 228 | else |
0d20ae72 | 229 | if (gdbarch_byte_order (current_gdbarch) == BFD_ENDIAN_BIG) |
7ab04401 AC |
230 | fprintf_unfiltered (file, |
231 | _("The target is assumed to be big endian\n")); | |
232 | else | |
233 | fprintf_unfiltered (file, | |
234 | _("The target is assumed to be little endian\n")); | |
b4a20239 AC |
235 | } |
236 | ||
237 | static void | |
238 | set_endian (char *ignore_args, int from_tty, struct cmd_list_element *c) | |
239 | { | |
7a107747 DJ |
240 | struct gdbarch_info info; |
241 | ||
242 | gdbarch_info_init (&info); | |
243 | ||
3fd3d7d2 | 244 | if (set_endian_string == endian_auto) |
b4a20239 | 245 | { |
7a107747 DJ |
246 | target_byte_order_user = BFD_ENDIAN_UNKNOWN; |
247 | if (! gdbarch_update_p (info)) | |
248 | internal_error (__FILE__, __LINE__, | |
249 | _("set_endian: architecture update failed")); | |
b4a20239 AC |
250 | } |
251 | else if (set_endian_string == endian_little) | |
252 | { | |
d90cf509 AC |
253 | info.byte_order = BFD_ENDIAN_LITTLE; |
254 | if (! gdbarch_update_p (info)) | |
edefbb7c | 255 | printf_unfiltered (_("Little endian target not supported by GDB\n")); |
7a107747 DJ |
256 | else |
257 | target_byte_order_user = BFD_ENDIAN_LITTLE; | |
b4a20239 AC |
258 | } |
259 | else if (set_endian_string == endian_big) | |
260 | { | |
d90cf509 AC |
261 | info.byte_order = BFD_ENDIAN_BIG; |
262 | if (! gdbarch_update_p (info)) | |
edefbb7c | 263 | printf_unfiltered (_("Big endian target not supported by GDB\n")); |
7a107747 DJ |
264 | else |
265 | target_byte_order_user = BFD_ENDIAN_BIG; | |
b4a20239 AC |
266 | } |
267 | else | |
8e65ff28 | 268 | internal_error (__FILE__, __LINE__, |
edefbb7c | 269 | _("set_endian: bad value")); |
7a107747 | 270 | |
7ab04401 | 271 | show_endian (gdb_stdout, from_tty, NULL, NULL); |
b4a20239 AC |
272 | } |
273 | ||
23181151 DJ |
274 | /* Given SELECTED, a currently selected BFD architecture, and |
275 | FROM_TARGET, a BFD architecture reported by the target description, | |
276 | return what architecture to use. Either may be NULL; if both are | |
277 | specified, we use the more specific. If the two are obviously | |
278 | incompatible, warn the user. */ | |
279 | ||
280 | static const struct bfd_arch_info * | |
281 | choose_architecture_for_target (const struct bfd_arch_info *selected, | |
282 | const struct bfd_arch_info *from_target) | |
283 | { | |
284 | const struct bfd_arch_info *compat1, *compat2; | |
285 | ||
286 | if (selected == NULL) | |
287 | return from_target; | |
288 | ||
289 | if (from_target == NULL) | |
290 | return selected; | |
291 | ||
292 | /* struct bfd_arch_info objects are singletons: that is, there's | |
293 | supposed to be exactly one instance for a given machine. So you | |
294 | can tell whether two are equivalent by comparing pointers. */ | |
295 | if (from_target == selected) | |
296 | return selected; | |
297 | ||
298 | /* BFD's 'A->compatible (A, B)' functions return zero if A and B are | |
299 | incompatible. But if they are compatible, it returns the 'more | |
300 | featureful' of the two arches. That is, if A can run code | |
301 | written for B, but B can't run code written for A, then it'll | |
302 | return A. | |
303 | ||
304 | Some targets (e.g. MIPS as of 2006-12-04) don't fully | |
305 | implement this, instead always returning NULL or the first | |
306 | argument. We detect that case by checking both directions. */ | |
307 | ||
308 | compat1 = selected->compatible (selected, from_target); | |
309 | compat2 = from_target->compatible (from_target, selected); | |
310 | ||
311 | if (compat1 == NULL && compat2 == NULL) | |
312 | { | |
313 | warning (_("Selected architecture %s is not compatible " | |
314 | "with reported target architecture %s"), | |
315 | selected->printable_name, from_target->printable_name); | |
316 | return selected; | |
317 | } | |
318 | ||
319 | if (compat1 == NULL) | |
320 | return compat2; | |
321 | if (compat2 == NULL) | |
322 | return compat1; | |
323 | if (compat1 == compat2) | |
324 | return compat1; | |
325 | ||
326 | /* If the two didn't match, but one of them was a default architecture, | |
327 | assume the more specific one is correct. This handles the case | |
328 | where an executable or target description just says "mips", but | |
329 | the other knows which MIPS variant. */ | |
330 | if (compat1->the_default) | |
331 | return compat2; | |
332 | if (compat2->the_default) | |
333 | return compat1; | |
334 | ||
335 | /* We have no idea which one is better. This is a bug, but not | |
336 | a critical problem; warn the user. */ | |
337 | warning (_("Selected architecture %s is ambiguous with " | |
338 | "reported target architecture %s"), | |
339 | selected->printable_name, from_target->printable_name); | |
340 | return selected; | |
341 | } | |
342 | ||
b4a20239 AC |
343 | /* Functions to manipulate the architecture of the target */ |
344 | ||
345 | enum set_arch { set_arch_auto, set_arch_manual }; | |
346 | ||
7a107747 | 347 | static const struct bfd_arch_info *target_architecture_user; |
b4a20239 | 348 | |
a8cf2722 AC |
349 | static const char *set_architecture_string; |
350 | ||
351 | const char * | |
352 | selected_architecture_name (void) | |
353 | { | |
7a107747 | 354 | if (target_architecture_user == NULL) |
a8cf2722 AC |
355 | return NULL; |
356 | else | |
357 | return set_architecture_string; | |
358 | } | |
b4a20239 | 359 | |
b4a20239 AC |
360 | /* Called if the user enters ``show architecture'' without an |
361 | argument. */ | |
362 | ||
363 | static void | |
7ab04401 AC |
364 | show_architecture (struct ui_file *file, int from_tty, |
365 | struct cmd_list_element *c, const char *value) | |
b4a20239 AC |
366 | { |
367 | const char *arch; | |
1143fffb | 368 | arch = gdbarch_bfd_arch_info (current_gdbarch)->printable_name; |
7a107747 | 369 | if (target_architecture_user == NULL) |
7ab04401 AC |
370 | fprintf_filtered (file, _("\ |
371 | The target architecture is set automatically (currently %s)\n"), arch); | |
b4a20239 | 372 | else |
7ab04401 AC |
373 | fprintf_filtered (file, _("\ |
374 | The target architecture is assumed to be %s\n"), arch); | |
b4a20239 AC |
375 | } |
376 | ||
377 | ||
378 | /* Called if the user enters ``set architecture'' with or without an | |
379 | argument. */ | |
380 | ||
381 | static void | |
382 | set_architecture (char *ignore_args, int from_tty, struct cmd_list_element *c) | |
383 | { | |
7a107747 DJ |
384 | struct gdbarch_info info; |
385 | ||
386 | gdbarch_info_init (&info); | |
387 | ||
b4a20239 AC |
388 | if (strcmp (set_architecture_string, "auto") == 0) |
389 | { | |
7a107747 DJ |
390 | target_architecture_user = NULL; |
391 | if (!gdbarch_update_p (info)) | |
392 | internal_error (__FILE__, __LINE__, | |
393 | _("could not select an architecture automatically")); | |
b4a20239 | 394 | } |
d90cf509 | 395 | else |
b4a20239 | 396 | { |
b4a20239 AC |
397 | info.bfd_arch_info = bfd_scan_arch (set_architecture_string); |
398 | if (info.bfd_arch_info == NULL) | |
8e65ff28 | 399 | internal_error (__FILE__, __LINE__, |
edefbb7c | 400 | _("set_architecture: bfd_scan_arch failed")); |
16f33e29 | 401 | if (gdbarch_update_p (info)) |
7a107747 | 402 | target_architecture_user = info.bfd_arch_info; |
b4a20239 | 403 | else |
edefbb7c | 404 | printf_unfiltered (_("Architecture `%s' not recognized.\n"), |
b4a20239 AC |
405 | set_architecture_string); |
406 | } | |
7ab04401 | 407 | show_architecture (gdb_stdout, from_tty, NULL, NULL); |
b4a20239 AC |
408 | } |
409 | ||
ebdba546 AC |
410 | /* Try to select a global architecture that matches "info". Return |
411 | non-zero if the attempt succeds. */ | |
412 | int | |
413 | gdbarch_update_p (struct gdbarch_info info) | |
414 | { | |
415 | struct gdbarch *new_gdbarch = gdbarch_find_by_info (info); | |
416 | ||
417 | /* If there no architecture by that name, reject the request. */ | |
418 | if (new_gdbarch == NULL) | |
419 | { | |
420 | if (gdbarch_debug) | |
421 | fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: " | |
422 | "Architecture not found\n"); | |
423 | return 0; | |
424 | } | |
425 | ||
426 | /* If it is the same old architecture, accept the request (but don't | |
427 | swap anything). */ | |
428 | if (new_gdbarch == current_gdbarch) | |
429 | { | |
430 | if (gdbarch_debug) | |
431 | fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: " | |
432 | "Architecture 0x%08lx (%s) unchanged\n", | |
433 | (long) new_gdbarch, | |
434 | gdbarch_bfd_arch_info (new_gdbarch)->printable_name); | |
435 | return 1; | |
436 | } | |
437 | ||
438 | /* It's a new architecture, swap it in. */ | |
439 | if (gdbarch_debug) | |
440 | fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: " | |
441 | "New architecture 0x%08lx (%s) selected\n", | |
442 | (long) new_gdbarch, | |
443 | gdbarch_bfd_arch_info (new_gdbarch)->printable_name); | |
444 | deprecated_current_gdbarch_select_hack (new_gdbarch); | |
445 | ||
446 | return 1; | |
447 | } | |
448 | ||
2b026650 MK |
449 | /* Return the architecture for ABFD. If no suitable architecture |
450 | could be find, return NULL. */ | |
451 | ||
452 | struct gdbarch * | |
453 | gdbarch_from_bfd (bfd *abfd) | |
b4a20239 | 454 | { |
2b026650 MK |
455 | struct gdbarch *old_gdbarch = current_gdbarch; |
456 | struct gdbarch *new_gdbarch; | |
d90cf509 | 457 | struct gdbarch_info info; |
2b026650 | 458 | |
7a107747 DJ |
459 | /* If we call gdbarch_find_by_info without filling in info.abfd, |
460 | then it will use the global exec_bfd. That's fine if we don't | |
461 | have one of those either. And that's the only time we should | |
462 | reach here with a NULL ABFD argument - when we are discarding | |
463 | the executable. */ | |
464 | gdb_assert (abfd != NULL || exec_bfd == NULL); | |
465 | ||
d90cf509 AC |
466 | gdbarch_info_init (&info); |
467 | info.abfd = abfd; | |
b60eb90d | 468 | return gdbarch_find_by_info (info); |
2b026650 MK |
469 | } |
470 | ||
471 | /* Set the dynamic target-system-dependent parameters (architecture, | |
472 | byte-order) using information found in the BFD */ | |
473 | ||
474 | void | |
475 | set_gdbarch_from_file (bfd *abfd) | |
476 | { | |
477 | struct gdbarch *gdbarch; | |
478 | ||
479 | gdbarch = gdbarch_from_bfd (abfd); | |
480 | if (gdbarch == NULL) | |
8a3fe4f8 | 481 | error (_("Architecture of file not recognized.")); |
b60eb90d | 482 | deprecated_current_gdbarch_select_hack (gdbarch); |
b4a20239 AC |
483 | } |
484 | ||
485 | /* Initialize the current architecture. Update the ``set | |
486 | architecture'' command so that it specifies a list of valid | |
487 | architectures. */ | |
488 | ||
1ba607ad AC |
489 | #ifdef DEFAULT_BFD_ARCH |
490 | extern const bfd_arch_info_type DEFAULT_BFD_ARCH; | |
491 | static const bfd_arch_info_type *default_bfd_arch = &DEFAULT_BFD_ARCH; | |
492 | #else | |
4b9b3959 | 493 | static const bfd_arch_info_type *default_bfd_arch; |
1ba607ad AC |
494 | #endif |
495 | ||
496 | #ifdef DEFAULT_BFD_VEC | |
497 | extern const bfd_target DEFAULT_BFD_VEC; | |
498 | static const bfd_target *default_bfd_vec = &DEFAULT_BFD_VEC; | |
499 | #else | |
500 | static const bfd_target *default_bfd_vec; | |
501 | #endif | |
502 | ||
7a107747 DJ |
503 | static int default_byte_order = BFD_ENDIAN_UNKNOWN; |
504 | ||
b4a20239 AC |
505 | void |
506 | initialize_current_architecture (void) | |
507 | { | |
508 | const char **arches = gdbarch_printable_names (); | |
b4a20239 | 509 | |
1ba607ad AC |
510 | /* determine a default architecture and byte order. */ |
511 | struct gdbarch_info info; | |
fb6ecb0f | 512 | gdbarch_info_init (&info); |
1ba607ad AC |
513 | |
514 | /* Find a default architecture. */ | |
7a107747 | 515 | if (default_bfd_arch == NULL) |
b4a20239 | 516 | { |
1ba607ad AC |
517 | /* Choose the architecture by taking the first one |
518 | alphabetically. */ | |
519 | const char *chosen = arches[0]; | |
b4a20239 | 520 | const char **arch; |
b4a20239 AC |
521 | for (arch = arches; *arch != NULL; arch++) |
522 | { | |
b4a20239 AC |
523 | if (strcmp (*arch, chosen) < 0) |
524 | chosen = *arch; | |
525 | } | |
526 | if (chosen == NULL) | |
8e65ff28 | 527 | internal_error (__FILE__, __LINE__, |
edefbb7c | 528 | _("initialize_current_architecture: No arch")); |
7a107747 DJ |
529 | default_bfd_arch = bfd_scan_arch (chosen); |
530 | if (default_bfd_arch == NULL) | |
8e65ff28 | 531 | internal_error (__FILE__, __LINE__, |
edefbb7c | 532 | _("initialize_current_architecture: Arch not found")); |
1ba607ad AC |
533 | } |
534 | ||
7a107747 DJ |
535 | info.bfd_arch_info = default_bfd_arch; |
536 | ||
afe64c1a | 537 | /* Take several guesses at a byte order. */ |
7a107747 | 538 | if (default_byte_order == BFD_ENDIAN_UNKNOWN |
1ba607ad AC |
539 | && default_bfd_vec != NULL) |
540 | { | |
541 | /* Extract BFD's default vector's byte order. */ | |
542 | switch (default_bfd_vec->byteorder) | |
543 | { | |
544 | case BFD_ENDIAN_BIG: | |
7a107747 | 545 | default_byte_order = BFD_ENDIAN_BIG; |
1ba607ad AC |
546 | break; |
547 | case BFD_ENDIAN_LITTLE: | |
7a107747 | 548 | default_byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad AC |
549 | break; |
550 | default: | |
551 | break; | |
552 | } | |
553 | } | |
7a107747 | 554 | if (default_byte_order == BFD_ENDIAN_UNKNOWN) |
1ba607ad AC |
555 | { |
556 | /* look for ``*el-*'' in the target name. */ | |
557 | const char *chp; | |
558 | chp = strchr (target_name, '-'); | |
559 | if (chp != NULL | |
560 | && chp - 2 >= target_name | |
561 | && strncmp (chp - 2, "el", 2) == 0) | |
7a107747 | 562 | default_byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad | 563 | } |
7a107747 | 564 | if (default_byte_order == BFD_ENDIAN_UNKNOWN) |
1ba607ad AC |
565 | { |
566 | /* Wire it to big-endian!!! */ | |
7a107747 | 567 | default_byte_order = BFD_ENDIAN_BIG; |
1ba607ad AC |
568 | } |
569 | ||
7a107747 DJ |
570 | info.byte_order = default_byte_order; |
571 | ||
d90cf509 AC |
572 | if (! gdbarch_update_p (info)) |
573 | internal_error (__FILE__, __LINE__, | |
edefbb7c AC |
574 | _("initialize_current_architecture: Selection of " |
575 | "initial architecture failed")); | |
b4a20239 | 576 | |
1ba607ad AC |
577 | /* Create the ``set architecture'' command appending ``auto'' to the |
578 | list of architectures. */ | |
b4a20239 AC |
579 | { |
580 | struct cmd_list_element *c; | |
581 | /* Append ``auto''. */ | |
582 | int nr; | |
583 | for (nr = 0; arches[nr] != NULL; nr++); | |
584 | arches = xrealloc (arches, sizeof (char*) * (nr + 2)); | |
585 | arches[nr + 0] = "auto"; | |
586 | arches[nr + 1] = NULL; | |
7ab04401 AC |
587 | add_setshow_enum_cmd ("architecture", class_support, |
588 | arches, &set_architecture_string, _("\ | |
589 | Set architecture of target."), _("\ | |
590 | Show architecture of target."), NULL, | |
591 | set_architecture, show_architecture, | |
592 | &setlist, &showlist); | |
b4a20239 | 593 | add_alias_cmd ("processor", "architecture", class_support, 1, &setlist); |
b4a20239 AC |
594 | } |
595 | } | |
596 | ||
597 | ||
fb6ecb0f AC |
598 | /* Initialize a gdbarch info to values that will be automatically |
599 | overridden. Note: Originally, this ``struct info'' was initialized | |
ce2826aa | 600 | using memset(0). Unfortunately, that ran into problems, namely |
fb6ecb0f AC |
601 | BFD_ENDIAN_BIG is zero. An explicit initialization function that |
602 | can explicitly set each field to a well defined value is used. */ | |
603 | ||
604 | void | |
605 | gdbarch_info_init (struct gdbarch_info *info) | |
606 | { | |
607 | memset (info, 0, sizeof (struct gdbarch_info)); | |
428721aa | 608 | info->byte_order = BFD_ENDIAN_UNKNOWN; |
4be87837 | 609 | info->osabi = GDB_OSABI_UNINITIALIZED; |
fb6ecb0f AC |
610 | } |
611 | ||
100bcc3f | 612 | /* Similar to init, but this time fill in the blanks. Information is |
7a107747 DJ |
613 | obtained from the global "set ..." options and explicitly |
614 | initialized INFO fields. */ | |
bf922ad9 AC |
615 | |
616 | void | |
7a107747 | 617 | gdbarch_info_fill (struct gdbarch_info *info) |
bf922ad9 | 618 | { |
7a107747 DJ |
619 | /* Check for the current file. */ |
620 | if (info->abfd == NULL) | |
621 | info->abfd = exec_bfd; | |
4eb0ad19 DJ |
622 | if (info->abfd == NULL) |
623 | info->abfd = core_bfd; | |
7a107747 | 624 | |
424163ea DJ |
625 | /* Check for the current target description. */ |
626 | if (info->target_desc == NULL) | |
627 | info->target_desc = target_current_description (); | |
628 | ||
bf922ad9 AC |
629 | /* "(gdb) set architecture ...". */ |
630 | if (info->bfd_arch_info == NULL | |
7a107747 DJ |
631 | && target_architecture_user) |
632 | info->bfd_arch_info = target_architecture_user; | |
424163ea | 633 | /* From the file. */ |
bf922ad9 AC |
634 | if (info->bfd_arch_info == NULL |
635 | && info->abfd != NULL | |
636 | && bfd_get_arch (info->abfd) != bfd_arch_unknown | |
637 | && bfd_get_arch (info->abfd) != bfd_arch_obscure) | |
638 | info->bfd_arch_info = bfd_get_arch_info (info->abfd); | |
23181151 DJ |
639 | /* From the target. */ |
640 | if (info->target_desc != NULL) | |
641 | info->bfd_arch_info = choose_architecture_for_target | |
642 | (info->bfd_arch_info, tdesc_architecture (info->target_desc)); | |
7a107747 DJ |
643 | /* From the default. */ |
644 | if (info->bfd_arch_info == NULL) | |
645 | info->bfd_arch_info = default_bfd_arch; | |
bf922ad9 AC |
646 | |
647 | /* "(gdb) set byte-order ...". */ | |
648 | if (info->byte_order == BFD_ENDIAN_UNKNOWN | |
7a107747 DJ |
649 | && target_byte_order_user != BFD_ENDIAN_UNKNOWN) |
650 | info->byte_order = target_byte_order_user; | |
bf922ad9 AC |
651 | /* From the INFO struct. */ |
652 | if (info->byte_order == BFD_ENDIAN_UNKNOWN | |
653 | && info->abfd != NULL) | |
654 | info->byte_order = (bfd_big_endian (info->abfd) ? BFD_ENDIAN_BIG | |
7a107747 DJ |
655 | : bfd_little_endian (info->abfd) ? BFD_ENDIAN_LITTLE |
656 | : BFD_ENDIAN_UNKNOWN); | |
657 | /* From the default. */ | |
658 | if (info->byte_order == BFD_ENDIAN_UNKNOWN) | |
659 | info->byte_order = default_byte_order; | |
bf922ad9 AC |
660 | |
661 | /* "(gdb) set osabi ...". Handled by gdbarch_lookup_osabi. */ | |
662 | if (info->osabi == GDB_OSABI_UNINITIALIZED) | |
663 | info->osabi = gdbarch_lookup_osabi (info->abfd); | |
bf922ad9 AC |
664 | |
665 | /* Must have at least filled in the architecture. */ | |
666 | gdb_assert (info->bfd_arch_info != NULL); | |
667 | } | |
668 | ||
c0e8c252 AC |
669 | /* */ |
670 | ||
a78f21af | 671 | extern initialize_file_ftype _initialize_gdbarch_utils; /* -Wmissing-prototypes */ |
c0e8c252 AC |
672 | |
673 | void | |
b4a20239 | 674 | _initialize_gdbarch_utils (void) |
c0e8c252 | 675 | { |
b4a20239 | 676 | struct cmd_list_element *c; |
7ab04401 AC |
677 | add_setshow_enum_cmd ("endian", class_support, |
678 | endian_enum, &set_endian_string, _("\ | |
679 | Set endianness of target."), _("\ | |
680 | Show endianness of target."), NULL, | |
681 | set_endian, show_endian, | |
682 | &setlist, &showlist); | |
c0e8c252 | 683 | } |