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 | |
a54fba4c MD |
138 | legacy_virtual_frame_pointer (struct gdbarch *gdbarch, |
139 | CORE_ADDR pc, | |
39d4ef09 AC |
140 | int *frame_regnum, |
141 | LONGEST *frame_offset) | |
142 | { | |
20bcf01c AC |
143 | /* FIXME: cagney/2002-09-13: This code is used when identifying the |
144 | frame pointer of the current PC. It is assuming that a single | |
145 | register and an offset can determine this. I think it should | |
146 | instead generate a byte code expression as that would work better | |
147 | with things like Dwarf2's CFI. */ | |
a54fba4c MD |
148 | if (gdbarch_deprecated_fp_regnum (gdbarch) >= 0 |
149 | && gdbarch_deprecated_fp_regnum (gdbarch) | |
150 | < gdbarch_num_regs (gdbarch)) | |
151 | *frame_regnum = gdbarch_deprecated_fp_regnum (gdbarch); | |
152 | else if (gdbarch_sp_regnum (gdbarch) >= 0 | |
153 | && gdbarch_sp_regnum (gdbarch) | |
154 | < gdbarch_num_regs (gdbarch)) | |
155 | *frame_regnum = gdbarch_sp_regnum (gdbarch); | |
20bcf01c AC |
156 | else |
157 | /* Should this be an internal error? I guess so, it is reflecting | |
158 | an architectural limitation in the current design. */ | |
edefbb7c | 159 | internal_error (__FILE__, __LINE__, _("No virtual frame pointer available")); |
39d4ef09 AC |
160 | *frame_offset = 0; |
161 | } | |
46cd78fb | 162 | |
d7bd68ca | 163 | \f |
13d01224 | 164 | int |
a1f4a1b6 | 165 | generic_convert_register_p (int regnum, struct type *type) |
13d01224 | 166 | { |
9730f241 | 167 | return 0; |
13d01224 AC |
168 | } |
169 | ||
192cb3d4 MK |
170 | int |
171 | default_stabs_argument_has_addr (struct gdbarch *gdbarch, struct type *type) | |
172 | { | |
192cb3d4 MK |
173 | return 0; |
174 | } | |
175 | ||
3ca64954 RC |
176 | int |
177 | generic_instruction_nullified (struct gdbarch *gdbarch, | |
178 | struct regcache *regcache) | |
179 | { | |
180 | return 0; | |
181 | } | |
182 | ||
123dc839 DJ |
183 | int |
184 | default_remote_register_number (struct gdbarch *gdbarch, | |
185 | int regno) | |
186 | { | |
187 | return regno; | |
188 | } | |
189 | ||
01fb7433 | 190 | \f |
b4a20239 AC |
191 | /* Functions to manipulate the endianness of the target. */ |
192 | ||
7a107747 | 193 | static int target_byte_order_user = BFD_ENDIAN_UNKNOWN; |
b4a20239 | 194 | |
53904c9e AC |
195 | static const char endian_big[] = "big"; |
196 | static const char endian_little[] = "little"; | |
197 | static const char endian_auto[] = "auto"; | |
198 | static const char *endian_enum[] = | |
b4a20239 AC |
199 | { |
200 | endian_big, | |
201 | endian_little, | |
202 | endian_auto, | |
203 | NULL, | |
204 | }; | |
53904c9e | 205 | static const char *set_endian_string; |
b4a20239 | 206 | |
b6d373df DJ |
207 | enum bfd_endian |
208 | selected_byte_order (void) | |
209 | { | |
210 | if (target_byte_order_user != BFD_ENDIAN_UNKNOWN) | |
0d20ae72 | 211 | return gdbarch_byte_order (current_gdbarch); |
b6d373df DJ |
212 | else |
213 | return BFD_ENDIAN_UNKNOWN; | |
214 | } | |
215 | ||
b4a20239 AC |
216 | /* Called by ``show endian''. */ |
217 | ||
218 | static void | |
7ab04401 AC |
219 | show_endian (struct ui_file *file, int from_tty, struct cmd_list_element *c, |
220 | const char *value) | |
b4a20239 | 221 | { |
7b6b9e83 | 222 | if (target_byte_order_user == BFD_ENDIAN_UNKNOWN) |
0d20ae72 | 223 | if (gdbarch_byte_order (current_gdbarch) == BFD_ENDIAN_BIG) |
7ab04401 AC |
224 | fprintf_unfiltered (file, _("The target endianness is set automatically " |
225 | "(currently big endian)\n")); | |
edefbb7c | 226 | else |
7ab04401 | 227 | fprintf_unfiltered (file, _("The target endianness is set automatically " |
edefbb7c | 228 | "(currently little endian)\n")); |
b4a20239 | 229 | else |
0d20ae72 | 230 | if (gdbarch_byte_order (current_gdbarch) == BFD_ENDIAN_BIG) |
7ab04401 AC |
231 | fprintf_unfiltered (file, |
232 | _("The target is assumed to be big endian\n")); | |
233 | else | |
234 | fprintf_unfiltered (file, | |
235 | _("The target is assumed to be little endian\n")); | |
b4a20239 AC |
236 | } |
237 | ||
238 | static void | |
239 | set_endian (char *ignore_args, int from_tty, struct cmd_list_element *c) | |
240 | { | |
7a107747 DJ |
241 | struct gdbarch_info info; |
242 | ||
243 | gdbarch_info_init (&info); | |
244 | ||
3fd3d7d2 | 245 | if (set_endian_string == endian_auto) |
b4a20239 | 246 | { |
7a107747 DJ |
247 | target_byte_order_user = BFD_ENDIAN_UNKNOWN; |
248 | if (! gdbarch_update_p (info)) | |
249 | internal_error (__FILE__, __LINE__, | |
250 | _("set_endian: architecture update failed")); | |
b4a20239 AC |
251 | } |
252 | else if (set_endian_string == endian_little) | |
253 | { | |
d90cf509 AC |
254 | info.byte_order = BFD_ENDIAN_LITTLE; |
255 | if (! gdbarch_update_p (info)) | |
edefbb7c | 256 | printf_unfiltered (_("Little endian target not supported by GDB\n")); |
7a107747 DJ |
257 | else |
258 | target_byte_order_user = BFD_ENDIAN_LITTLE; | |
b4a20239 AC |
259 | } |
260 | else if (set_endian_string == endian_big) | |
261 | { | |
d90cf509 AC |
262 | info.byte_order = BFD_ENDIAN_BIG; |
263 | if (! gdbarch_update_p (info)) | |
edefbb7c | 264 | printf_unfiltered (_("Big endian target not supported by GDB\n")); |
7a107747 DJ |
265 | else |
266 | target_byte_order_user = BFD_ENDIAN_BIG; | |
b4a20239 AC |
267 | } |
268 | else | |
8e65ff28 | 269 | internal_error (__FILE__, __LINE__, |
edefbb7c | 270 | _("set_endian: bad value")); |
7a107747 | 271 | |
7ab04401 | 272 | show_endian (gdb_stdout, from_tty, NULL, NULL); |
b4a20239 AC |
273 | } |
274 | ||
23181151 DJ |
275 | /* Given SELECTED, a currently selected BFD architecture, and |
276 | FROM_TARGET, a BFD architecture reported by the target description, | |
277 | return what architecture to use. Either may be NULL; if both are | |
278 | specified, we use the more specific. If the two are obviously | |
279 | incompatible, warn the user. */ | |
280 | ||
281 | static const struct bfd_arch_info * | |
282 | choose_architecture_for_target (const struct bfd_arch_info *selected, | |
283 | const struct bfd_arch_info *from_target) | |
284 | { | |
285 | const struct bfd_arch_info *compat1, *compat2; | |
286 | ||
287 | if (selected == NULL) | |
288 | return from_target; | |
289 | ||
290 | if (from_target == NULL) | |
291 | return selected; | |
292 | ||
293 | /* struct bfd_arch_info objects are singletons: that is, there's | |
294 | supposed to be exactly one instance for a given machine. So you | |
295 | can tell whether two are equivalent by comparing pointers. */ | |
296 | if (from_target == selected) | |
297 | return selected; | |
298 | ||
299 | /* BFD's 'A->compatible (A, B)' functions return zero if A and B are | |
300 | incompatible. But if they are compatible, it returns the 'more | |
301 | featureful' of the two arches. That is, if A can run code | |
302 | written for B, but B can't run code written for A, then it'll | |
303 | return A. | |
304 | ||
305 | Some targets (e.g. MIPS as of 2006-12-04) don't fully | |
306 | implement this, instead always returning NULL or the first | |
307 | argument. We detect that case by checking both directions. */ | |
308 | ||
309 | compat1 = selected->compatible (selected, from_target); | |
310 | compat2 = from_target->compatible (from_target, selected); | |
311 | ||
312 | if (compat1 == NULL && compat2 == NULL) | |
313 | { | |
314 | warning (_("Selected architecture %s is not compatible " | |
315 | "with reported target architecture %s"), | |
316 | selected->printable_name, from_target->printable_name); | |
317 | return selected; | |
318 | } | |
319 | ||
320 | if (compat1 == NULL) | |
321 | return compat2; | |
322 | if (compat2 == NULL) | |
323 | return compat1; | |
324 | if (compat1 == compat2) | |
325 | return compat1; | |
326 | ||
327 | /* If the two didn't match, but one of them was a default architecture, | |
328 | assume the more specific one is correct. This handles the case | |
329 | where an executable or target description just says "mips", but | |
330 | the other knows which MIPS variant. */ | |
331 | if (compat1->the_default) | |
332 | return compat2; | |
333 | if (compat2->the_default) | |
334 | return compat1; | |
335 | ||
336 | /* We have no idea which one is better. This is a bug, but not | |
337 | a critical problem; warn the user. */ | |
338 | warning (_("Selected architecture %s is ambiguous with " | |
339 | "reported target architecture %s"), | |
340 | selected->printable_name, from_target->printable_name); | |
341 | return selected; | |
342 | } | |
343 | ||
b4a20239 AC |
344 | /* Functions to manipulate the architecture of the target */ |
345 | ||
346 | enum set_arch { set_arch_auto, set_arch_manual }; | |
347 | ||
7a107747 | 348 | static const struct bfd_arch_info *target_architecture_user; |
b4a20239 | 349 | |
a8cf2722 AC |
350 | static const char *set_architecture_string; |
351 | ||
352 | const char * | |
353 | selected_architecture_name (void) | |
354 | { | |
7a107747 | 355 | if (target_architecture_user == NULL) |
a8cf2722 AC |
356 | return NULL; |
357 | else | |
358 | return set_architecture_string; | |
359 | } | |
b4a20239 | 360 | |
b4a20239 AC |
361 | /* Called if the user enters ``show architecture'' without an |
362 | argument. */ | |
363 | ||
364 | static void | |
7ab04401 AC |
365 | show_architecture (struct ui_file *file, int from_tty, |
366 | struct cmd_list_element *c, const char *value) | |
b4a20239 AC |
367 | { |
368 | const char *arch; | |
1143fffb | 369 | arch = gdbarch_bfd_arch_info (current_gdbarch)->printable_name; |
7a107747 | 370 | if (target_architecture_user == NULL) |
7ab04401 AC |
371 | fprintf_filtered (file, _("\ |
372 | The target architecture is set automatically (currently %s)\n"), arch); | |
b4a20239 | 373 | else |
7ab04401 AC |
374 | fprintf_filtered (file, _("\ |
375 | The target architecture is assumed to be %s\n"), arch); | |
b4a20239 AC |
376 | } |
377 | ||
378 | ||
379 | /* Called if the user enters ``set architecture'' with or without an | |
380 | argument. */ | |
381 | ||
382 | static void | |
383 | set_architecture (char *ignore_args, int from_tty, struct cmd_list_element *c) | |
384 | { | |
7a107747 DJ |
385 | struct gdbarch_info info; |
386 | ||
387 | gdbarch_info_init (&info); | |
388 | ||
b4a20239 AC |
389 | if (strcmp (set_architecture_string, "auto") == 0) |
390 | { | |
7a107747 DJ |
391 | target_architecture_user = NULL; |
392 | if (!gdbarch_update_p (info)) | |
393 | internal_error (__FILE__, __LINE__, | |
394 | _("could not select an architecture automatically")); | |
b4a20239 | 395 | } |
d90cf509 | 396 | else |
b4a20239 | 397 | { |
b4a20239 AC |
398 | info.bfd_arch_info = bfd_scan_arch (set_architecture_string); |
399 | if (info.bfd_arch_info == NULL) | |
8e65ff28 | 400 | internal_error (__FILE__, __LINE__, |
edefbb7c | 401 | _("set_architecture: bfd_scan_arch failed")); |
16f33e29 | 402 | if (gdbarch_update_p (info)) |
7a107747 | 403 | target_architecture_user = info.bfd_arch_info; |
b4a20239 | 404 | else |
edefbb7c | 405 | printf_unfiltered (_("Architecture `%s' not recognized.\n"), |
b4a20239 AC |
406 | set_architecture_string); |
407 | } | |
7ab04401 | 408 | show_architecture (gdb_stdout, from_tty, NULL, NULL); |
b4a20239 AC |
409 | } |
410 | ||
ebdba546 AC |
411 | /* Try to select a global architecture that matches "info". Return |
412 | non-zero if the attempt succeds. */ | |
413 | int | |
414 | gdbarch_update_p (struct gdbarch_info info) | |
415 | { | |
416 | struct gdbarch *new_gdbarch = gdbarch_find_by_info (info); | |
417 | ||
418 | /* If there no architecture by that name, reject the request. */ | |
419 | if (new_gdbarch == NULL) | |
420 | { | |
421 | if (gdbarch_debug) | |
422 | fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: " | |
423 | "Architecture not found\n"); | |
424 | return 0; | |
425 | } | |
426 | ||
427 | /* If it is the same old architecture, accept the request (but don't | |
428 | swap anything). */ | |
429 | if (new_gdbarch == current_gdbarch) | |
430 | { | |
431 | if (gdbarch_debug) | |
432 | fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: " | |
433 | "Architecture 0x%08lx (%s) unchanged\n", | |
434 | (long) new_gdbarch, | |
435 | gdbarch_bfd_arch_info (new_gdbarch)->printable_name); | |
436 | return 1; | |
437 | } | |
438 | ||
439 | /* It's a new architecture, swap it in. */ | |
440 | if (gdbarch_debug) | |
441 | fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: " | |
442 | "New architecture 0x%08lx (%s) selected\n", | |
443 | (long) new_gdbarch, | |
444 | gdbarch_bfd_arch_info (new_gdbarch)->printable_name); | |
445 | deprecated_current_gdbarch_select_hack (new_gdbarch); | |
446 | ||
447 | return 1; | |
448 | } | |
449 | ||
2b026650 MK |
450 | /* Return the architecture for ABFD. If no suitable architecture |
451 | could be find, return NULL. */ | |
452 | ||
453 | struct gdbarch * | |
454 | gdbarch_from_bfd (bfd *abfd) | |
b4a20239 | 455 | { |
2b026650 MK |
456 | struct gdbarch *old_gdbarch = current_gdbarch; |
457 | struct gdbarch *new_gdbarch; | |
d90cf509 | 458 | struct gdbarch_info info; |
2b026650 | 459 | |
7a107747 DJ |
460 | /* If we call gdbarch_find_by_info without filling in info.abfd, |
461 | then it will use the global exec_bfd. That's fine if we don't | |
462 | have one of those either. And that's the only time we should | |
463 | reach here with a NULL ABFD argument - when we are discarding | |
464 | the executable. */ | |
465 | gdb_assert (abfd != NULL || exec_bfd == NULL); | |
466 | ||
d90cf509 AC |
467 | gdbarch_info_init (&info); |
468 | info.abfd = abfd; | |
b60eb90d | 469 | return gdbarch_find_by_info (info); |
2b026650 MK |
470 | } |
471 | ||
472 | /* Set the dynamic target-system-dependent parameters (architecture, | |
473 | byte-order) using information found in the BFD */ | |
474 | ||
475 | void | |
476 | set_gdbarch_from_file (bfd *abfd) | |
477 | { | |
478 | struct gdbarch *gdbarch; | |
479 | ||
480 | gdbarch = gdbarch_from_bfd (abfd); | |
481 | if (gdbarch == NULL) | |
8a3fe4f8 | 482 | error (_("Architecture of file not recognized.")); |
b60eb90d | 483 | deprecated_current_gdbarch_select_hack (gdbarch); |
b4a20239 AC |
484 | } |
485 | ||
486 | /* Initialize the current architecture. Update the ``set | |
487 | architecture'' command so that it specifies a list of valid | |
488 | architectures. */ | |
489 | ||
1ba607ad AC |
490 | #ifdef DEFAULT_BFD_ARCH |
491 | extern const bfd_arch_info_type DEFAULT_BFD_ARCH; | |
492 | static const bfd_arch_info_type *default_bfd_arch = &DEFAULT_BFD_ARCH; | |
493 | #else | |
4b9b3959 | 494 | static const bfd_arch_info_type *default_bfd_arch; |
1ba607ad AC |
495 | #endif |
496 | ||
497 | #ifdef DEFAULT_BFD_VEC | |
498 | extern const bfd_target DEFAULT_BFD_VEC; | |
499 | static const bfd_target *default_bfd_vec = &DEFAULT_BFD_VEC; | |
500 | #else | |
501 | static const bfd_target *default_bfd_vec; | |
502 | #endif | |
503 | ||
7a107747 DJ |
504 | static int default_byte_order = BFD_ENDIAN_UNKNOWN; |
505 | ||
b4a20239 AC |
506 | void |
507 | initialize_current_architecture (void) | |
508 | { | |
509 | const char **arches = gdbarch_printable_names (); | |
b4a20239 | 510 | |
1ba607ad AC |
511 | /* determine a default architecture and byte order. */ |
512 | struct gdbarch_info info; | |
fb6ecb0f | 513 | gdbarch_info_init (&info); |
1ba607ad AC |
514 | |
515 | /* Find a default architecture. */ | |
7a107747 | 516 | if (default_bfd_arch == NULL) |
b4a20239 | 517 | { |
1ba607ad AC |
518 | /* Choose the architecture by taking the first one |
519 | alphabetically. */ | |
520 | const char *chosen = arches[0]; | |
b4a20239 | 521 | const char **arch; |
b4a20239 AC |
522 | for (arch = arches; *arch != NULL; arch++) |
523 | { | |
b4a20239 AC |
524 | if (strcmp (*arch, chosen) < 0) |
525 | chosen = *arch; | |
526 | } | |
527 | if (chosen == NULL) | |
8e65ff28 | 528 | internal_error (__FILE__, __LINE__, |
edefbb7c | 529 | _("initialize_current_architecture: No arch")); |
7a107747 DJ |
530 | default_bfd_arch = bfd_scan_arch (chosen); |
531 | if (default_bfd_arch == NULL) | |
8e65ff28 | 532 | internal_error (__FILE__, __LINE__, |
edefbb7c | 533 | _("initialize_current_architecture: Arch not found")); |
1ba607ad AC |
534 | } |
535 | ||
7a107747 DJ |
536 | info.bfd_arch_info = default_bfd_arch; |
537 | ||
afe64c1a | 538 | /* Take several guesses at a byte order. */ |
7a107747 | 539 | if (default_byte_order == BFD_ENDIAN_UNKNOWN |
1ba607ad AC |
540 | && default_bfd_vec != NULL) |
541 | { | |
542 | /* Extract BFD's default vector's byte order. */ | |
543 | switch (default_bfd_vec->byteorder) | |
544 | { | |
545 | case BFD_ENDIAN_BIG: | |
7a107747 | 546 | default_byte_order = BFD_ENDIAN_BIG; |
1ba607ad AC |
547 | break; |
548 | case BFD_ENDIAN_LITTLE: | |
7a107747 | 549 | default_byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad AC |
550 | break; |
551 | default: | |
552 | break; | |
553 | } | |
554 | } | |
7a107747 | 555 | if (default_byte_order == BFD_ENDIAN_UNKNOWN) |
1ba607ad AC |
556 | { |
557 | /* look for ``*el-*'' in the target name. */ | |
558 | const char *chp; | |
559 | chp = strchr (target_name, '-'); | |
560 | if (chp != NULL | |
561 | && chp - 2 >= target_name | |
562 | && strncmp (chp - 2, "el", 2) == 0) | |
7a107747 | 563 | default_byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad | 564 | } |
7a107747 | 565 | if (default_byte_order == BFD_ENDIAN_UNKNOWN) |
1ba607ad AC |
566 | { |
567 | /* Wire it to big-endian!!! */ | |
7a107747 | 568 | default_byte_order = BFD_ENDIAN_BIG; |
1ba607ad AC |
569 | } |
570 | ||
7a107747 DJ |
571 | info.byte_order = default_byte_order; |
572 | ||
d90cf509 AC |
573 | if (! gdbarch_update_p (info)) |
574 | internal_error (__FILE__, __LINE__, | |
edefbb7c AC |
575 | _("initialize_current_architecture: Selection of " |
576 | "initial architecture failed")); | |
b4a20239 | 577 | |
1ba607ad AC |
578 | /* Create the ``set architecture'' command appending ``auto'' to the |
579 | list of architectures. */ | |
b4a20239 AC |
580 | { |
581 | struct cmd_list_element *c; | |
582 | /* Append ``auto''. */ | |
583 | int nr; | |
584 | for (nr = 0; arches[nr] != NULL; nr++); | |
585 | arches = xrealloc (arches, sizeof (char*) * (nr + 2)); | |
586 | arches[nr + 0] = "auto"; | |
587 | arches[nr + 1] = NULL; | |
7ab04401 AC |
588 | add_setshow_enum_cmd ("architecture", class_support, |
589 | arches, &set_architecture_string, _("\ | |
590 | Set architecture of target."), _("\ | |
591 | Show architecture of target."), NULL, | |
592 | set_architecture, show_architecture, | |
593 | &setlist, &showlist); | |
b4a20239 | 594 | add_alias_cmd ("processor", "architecture", class_support, 1, &setlist); |
b4a20239 AC |
595 | } |
596 | } | |
597 | ||
598 | ||
fb6ecb0f AC |
599 | /* Initialize a gdbarch info to values that will be automatically |
600 | overridden. Note: Originally, this ``struct info'' was initialized | |
ce2826aa | 601 | using memset(0). Unfortunately, that ran into problems, namely |
fb6ecb0f AC |
602 | BFD_ENDIAN_BIG is zero. An explicit initialization function that |
603 | can explicitly set each field to a well defined value is used. */ | |
604 | ||
605 | void | |
606 | gdbarch_info_init (struct gdbarch_info *info) | |
607 | { | |
608 | memset (info, 0, sizeof (struct gdbarch_info)); | |
428721aa | 609 | info->byte_order = BFD_ENDIAN_UNKNOWN; |
4be87837 | 610 | info->osabi = GDB_OSABI_UNINITIALIZED; |
fb6ecb0f AC |
611 | } |
612 | ||
100bcc3f | 613 | /* Similar to init, but this time fill in the blanks. Information is |
7a107747 DJ |
614 | obtained from the global "set ..." options and explicitly |
615 | initialized INFO fields. */ | |
bf922ad9 AC |
616 | |
617 | void | |
7a107747 | 618 | gdbarch_info_fill (struct gdbarch_info *info) |
bf922ad9 | 619 | { |
7a107747 DJ |
620 | /* Check for the current file. */ |
621 | if (info->abfd == NULL) | |
622 | info->abfd = exec_bfd; | |
4eb0ad19 DJ |
623 | if (info->abfd == NULL) |
624 | info->abfd = core_bfd; | |
7a107747 | 625 | |
424163ea DJ |
626 | /* Check for the current target description. */ |
627 | if (info->target_desc == NULL) | |
628 | info->target_desc = target_current_description (); | |
629 | ||
bf922ad9 AC |
630 | /* "(gdb) set architecture ...". */ |
631 | if (info->bfd_arch_info == NULL | |
7a107747 DJ |
632 | && target_architecture_user) |
633 | info->bfd_arch_info = target_architecture_user; | |
424163ea | 634 | /* From the file. */ |
bf922ad9 AC |
635 | if (info->bfd_arch_info == NULL |
636 | && info->abfd != NULL | |
637 | && bfd_get_arch (info->abfd) != bfd_arch_unknown | |
638 | && bfd_get_arch (info->abfd) != bfd_arch_obscure) | |
639 | info->bfd_arch_info = bfd_get_arch_info (info->abfd); | |
23181151 DJ |
640 | /* From the target. */ |
641 | if (info->target_desc != NULL) | |
642 | info->bfd_arch_info = choose_architecture_for_target | |
643 | (info->bfd_arch_info, tdesc_architecture (info->target_desc)); | |
7a107747 DJ |
644 | /* From the default. */ |
645 | if (info->bfd_arch_info == NULL) | |
646 | info->bfd_arch_info = default_bfd_arch; | |
bf922ad9 AC |
647 | |
648 | /* "(gdb) set byte-order ...". */ | |
649 | if (info->byte_order == BFD_ENDIAN_UNKNOWN | |
7a107747 DJ |
650 | && target_byte_order_user != BFD_ENDIAN_UNKNOWN) |
651 | info->byte_order = target_byte_order_user; | |
bf922ad9 AC |
652 | /* From the INFO struct. */ |
653 | if (info->byte_order == BFD_ENDIAN_UNKNOWN | |
654 | && info->abfd != NULL) | |
655 | info->byte_order = (bfd_big_endian (info->abfd) ? BFD_ENDIAN_BIG | |
7a107747 DJ |
656 | : bfd_little_endian (info->abfd) ? BFD_ENDIAN_LITTLE |
657 | : BFD_ENDIAN_UNKNOWN); | |
658 | /* From the default. */ | |
659 | if (info->byte_order == BFD_ENDIAN_UNKNOWN) | |
660 | info->byte_order = default_byte_order; | |
bf922ad9 AC |
661 | |
662 | /* "(gdb) set osabi ...". Handled by gdbarch_lookup_osabi. */ | |
663 | if (info->osabi == GDB_OSABI_UNINITIALIZED) | |
664 | info->osabi = gdbarch_lookup_osabi (info->abfd); | |
bf922ad9 AC |
665 | |
666 | /* Must have at least filled in the architecture. */ | |
667 | gdb_assert (info->bfd_arch_info != NULL); | |
668 | } | |
669 | ||
c0e8c252 AC |
670 | /* */ |
671 | ||
a78f21af | 672 | extern initialize_file_ftype _initialize_gdbarch_utils; /* -Wmissing-prototypes */ |
c0e8c252 AC |
673 | |
674 | void | |
b4a20239 | 675 | _initialize_gdbarch_utils (void) |
c0e8c252 | 676 | { |
b4a20239 | 677 | struct cmd_list_element *c; |
7ab04401 AC |
678 | add_setshow_enum_cmd ("endian", class_support, |
679 | endian_enum, &set_endian_string, _("\ | |
680 | Set endianness of target."), _("\ | |
681 | Show endianness of target."), NULL, | |
682 | set_endian, show_endian, | |
683 | &setlist, &showlist); | |
c0e8c252 | 684 | } |