Commit | Line | Data |
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c0e8c252 | 1 | /* Dynamic architecture support for GDB, the GNU debugger. |
f4f9705a | 2 | |
9b254dd1 | 3 | Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, |
0fb0cc75 | 4 | 2008, 2009 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" |
237fc4c9 | 34 | #include "objfiles.h" |
bf922ad9 | 35 | |
1ba607ad AC |
36 | #include "version.h" |
37 | ||
f0d4cc9e AC |
38 | #include "floatformat.h" |
39 | ||
1fd35568 | 40 | |
237fc4c9 PA |
41 | struct displaced_step_closure * |
42 | simple_displaced_step_copy_insn (struct gdbarch *gdbarch, | |
43 | CORE_ADDR from, CORE_ADDR to, | |
44 | struct regcache *regs) | |
45 | { | |
46 | size_t len = gdbarch_max_insn_length (gdbarch); | |
47 | gdb_byte *buf = xmalloc (len); | |
48 | ||
49 | read_memory (from, buf, len); | |
50 | write_memory (to, buf, len); | |
51 | ||
52 | if (debug_displaced) | |
53 | { | |
5af949e3 UW |
54 | fprintf_unfiltered (gdb_stdlog, "displaced: copy %s->%s: ", |
55 | paddress (gdbarch, from), paddress (gdbarch, to)); | |
237fc4c9 PA |
56 | displaced_step_dump_bytes (gdb_stdlog, buf, len); |
57 | } | |
58 | ||
59 | return (struct displaced_step_closure *) buf; | |
60 | } | |
61 | ||
62 | ||
63 | void | |
64 | simple_displaced_step_free_closure (struct gdbarch *gdbarch, | |
65 | struct displaced_step_closure *closure) | |
66 | { | |
67 | xfree (closure); | |
68 | } | |
69 | ||
70 | ||
71 | CORE_ADDR | |
72 | displaced_step_at_entry_point (struct gdbarch *gdbarch) | |
73 | { | |
74 | CORE_ADDR addr; | |
75 | int bp_len; | |
76 | ||
77 | addr = entry_point_address (); | |
78 | ||
237fc4c9 PA |
79 | /* Inferior calls also use the entry point as a breakpoint location. |
80 | We don't want displaced stepping to interfere with those | |
81 | breakpoints, so leave space. */ | |
82 | gdbarch_breakpoint_from_pc (gdbarch, &addr, &bp_len); | |
83 | addr += bp_len * 2; | |
84 | ||
85 | return addr; | |
86 | } | |
87 | ||
4182591f | 88 | int |
e7faf938 | 89 | legacy_register_sim_regno (struct gdbarch *gdbarch, int regnum) |
4182591f AC |
90 | { |
91 | /* Only makes sense to supply raw registers. */ | |
e7faf938 | 92 | gdb_assert (regnum >= 0 && regnum < gdbarch_num_regs (gdbarch)); |
4182591f AC |
93 | /* NOTE: cagney/2002-05-13: The old code did it this way and it is |
94 | suspected that some GDB/SIM combinations may rely on this | |
95 | behavour. The default should be one2one_register_sim_regno | |
96 | (below). */ | |
e7faf938 MD |
97 | if (gdbarch_register_name (gdbarch, regnum) != NULL |
98 | && gdbarch_register_name (gdbarch, regnum)[0] != '\0') | |
4182591f AC |
99 | return regnum; |
100 | else | |
101 | return LEGACY_SIM_REGNO_IGNORE; | |
102 | } | |
103 | ||
bdcd319a | 104 | CORE_ADDR |
52f729a7 | 105 | generic_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc) |
bdcd319a CV |
106 | { |
107 | return 0; | |
108 | } | |
109 | ||
dea0c52f | 110 | CORE_ADDR |
4c8c40e6 | 111 | generic_skip_solib_resolver (struct gdbarch *gdbarch, CORE_ADDR pc) |
dea0c52f MK |
112 | { |
113 | return 0; | |
114 | } | |
115 | ||
d50355b6 | 116 | int |
e17a4113 UW |
117 | generic_in_solib_return_trampoline (struct gdbarch *gdbarch, |
118 | CORE_ADDR pc, char *name) | |
d50355b6 MS |
119 | { |
120 | return 0; | |
121 | } | |
122 | ||
c12260ac CV |
123 | int |
124 | generic_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc) | |
125 | { | |
126 | return 0; | |
127 | } | |
128 | ||
4d1e7dd1 | 129 | /* Helper functions for gdbarch_inner_than */ |
3339cf8b AC |
130 | |
131 | int | |
fba45db2 | 132 | core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs) |
3339cf8b AC |
133 | { |
134 | return (lhs < rhs); | |
135 | } | |
136 | ||
137 | int | |
fba45db2 | 138 | core_addr_greaterthan (CORE_ADDR lhs, CORE_ADDR rhs) |
3339cf8b AC |
139 | { |
140 | return (lhs > rhs); | |
141 | } | |
142 | ||
193e3b1a AC |
143 | /* Misc helper functions for targets. */ |
144 | ||
f517ea4e | 145 | CORE_ADDR |
24568a2c | 146 | core_addr_identity (struct gdbarch *gdbarch, CORE_ADDR addr) |
f517ea4e PS |
147 | { |
148 | return addr; | |
149 | } | |
150 | ||
e2d0e7eb AC |
151 | CORE_ADDR |
152 | convert_from_func_ptr_addr_identity (struct gdbarch *gdbarch, CORE_ADDR addr, | |
153 | struct target_ops *targ) | |
154 | { | |
155 | return addr; | |
156 | } | |
157 | ||
88c72b7d | 158 | int |
d3f73121 | 159 | no_op_reg_to_regnum (struct gdbarch *gdbarch, int reg) |
88c72b7d AC |
160 | { |
161 | return reg; | |
162 | } | |
163 | ||
a2cf933a EZ |
164 | void |
165 | default_elf_make_msymbol_special (asymbol *sym, struct minimal_symbol *msym) | |
166 | { | |
167 | return; | |
168 | } | |
169 | ||
170 | void | |
171 | default_coff_make_msymbol_special (int val, struct minimal_symbol *msym) | |
172 | { | |
173 | return; | |
174 | } | |
175 | ||
01fb7433 | 176 | int |
64a3914f | 177 | cannot_register_not (struct gdbarch *gdbarch, int regnum) |
01fb7433 AC |
178 | { |
179 | return 0; | |
180 | } | |
39d4ef09 AC |
181 | |
182 | /* Legacy version of target_virtual_frame_pointer(). Assumes that | |
064f5156 | 183 | there is an gdbarch_deprecated_fp_regnum and that it is the same, cooked or |
0ba6dca9 | 184 | raw. */ |
39d4ef09 AC |
185 | |
186 | void | |
a54fba4c MD |
187 | legacy_virtual_frame_pointer (struct gdbarch *gdbarch, |
188 | CORE_ADDR pc, | |
39d4ef09 AC |
189 | int *frame_regnum, |
190 | LONGEST *frame_offset) | |
191 | { | |
20bcf01c AC |
192 | /* FIXME: cagney/2002-09-13: This code is used when identifying the |
193 | frame pointer of the current PC. It is assuming that a single | |
194 | register and an offset can determine this. I think it should | |
195 | instead generate a byte code expression as that would work better | |
196 | with things like Dwarf2's CFI. */ | |
a54fba4c MD |
197 | if (gdbarch_deprecated_fp_regnum (gdbarch) >= 0 |
198 | && gdbarch_deprecated_fp_regnum (gdbarch) | |
199 | < gdbarch_num_regs (gdbarch)) | |
200 | *frame_regnum = gdbarch_deprecated_fp_regnum (gdbarch); | |
201 | else if (gdbarch_sp_regnum (gdbarch) >= 0 | |
202 | && gdbarch_sp_regnum (gdbarch) | |
203 | < gdbarch_num_regs (gdbarch)) | |
204 | *frame_regnum = gdbarch_sp_regnum (gdbarch); | |
20bcf01c AC |
205 | else |
206 | /* Should this be an internal error? I guess so, it is reflecting | |
207 | an architectural limitation in the current design. */ | |
edefbb7c | 208 | internal_error (__FILE__, __LINE__, _("No virtual frame pointer available")); |
39d4ef09 AC |
209 | *frame_offset = 0; |
210 | } | |
46cd78fb | 211 | |
d7bd68ca | 212 | \f |
13d01224 | 213 | int |
76a8ddb9 UW |
214 | generic_convert_register_p (struct gdbarch *gdbarch, int regnum, |
215 | struct type *type) | |
13d01224 | 216 | { |
9730f241 | 217 | return 0; |
13d01224 AC |
218 | } |
219 | ||
192cb3d4 MK |
220 | int |
221 | default_stabs_argument_has_addr (struct gdbarch *gdbarch, struct type *type) | |
222 | { | |
192cb3d4 MK |
223 | return 0; |
224 | } | |
225 | ||
3ca64954 RC |
226 | int |
227 | generic_instruction_nullified (struct gdbarch *gdbarch, | |
228 | struct regcache *regcache) | |
229 | { | |
230 | return 0; | |
231 | } | |
232 | ||
123dc839 DJ |
233 | int |
234 | default_remote_register_number (struct gdbarch *gdbarch, | |
235 | int regno) | |
236 | { | |
237 | return regno; | |
238 | } | |
239 | ||
01fb7433 | 240 | \f |
b4a20239 AC |
241 | /* Functions to manipulate the endianness of the target. */ |
242 | ||
7a107747 | 243 | static int target_byte_order_user = BFD_ENDIAN_UNKNOWN; |
b4a20239 | 244 | |
53904c9e AC |
245 | static const char endian_big[] = "big"; |
246 | static const char endian_little[] = "little"; | |
247 | static const char endian_auto[] = "auto"; | |
248 | static const char *endian_enum[] = | |
b4a20239 AC |
249 | { |
250 | endian_big, | |
251 | endian_little, | |
252 | endian_auto, | |
253 | NULL, | |
254 | }; | |
53904c9e | 255 | static const char *set_endian_string; |
b4a20239 | 256 | |
b6d373df DJ |
257 | enum bfd_endian |
258 | selected_byte_order (void) | |
259 | { | |
e17c207e | 260 | return target_byte_order_user; |
b6d373df DJ |
261 | } |
262 | ||
b4a20239 AC |
263 | /* Called by ``show endian''. */ |
264 | ||
265 | static void | |
7ab04401 AC |
266 | show_endian (struct ui_file *file, int from_tty, struct cmd_list_element *c, |
267 | const char *value) | |
b4a20239 | 268 | { |
7b6b9e83 | 269 | if (target_byte_order_user == BFD_ENDIAN_UNKNOWN) |
e17c207e | 270 | if (gdbarch_byte_order (get_current_arch ()) == BFD_ENDIAN_BIG) |
7ab04401 AC |
271 | fprintf_unfiltered (file, _("The target endianness is set automatically " |
272 | "(currently big endian)\n")); | |
edefbb7c | 273 | else |
7ab04401 | 274 | fprintf_unfiltered (file, _("The target endianness is set automatically " |
edefbb7c | 275 | "(currently little endian)\n")); |
b4a20239 | 276 | else |
e17c207e | 277 | if (target_byte_order_user == BFD_ENDIAN_BIG) |
7ab04401 AC |
278 | fprintf_unfiltered (file, |
279 | _("The target is assumed to be big endian\n")); | |
280 | else | |
281 | fprintf_unfiltered (file, | |
282 | _("The target is assumed to be little endian\n")); | |
b4a20239 AC |
283 | } |
284 | ||
285 | static void | |
286 | set_endian (char *ignore_args, int from_tty, struct cmd_list_element *c) | |
287 | { | |
7a107747 DJ |
288 | struct gdbarch_info info; |
289 | ||
290 | gdbarch_info_init (&info); | |
291 | ||
3fd3d7d2 | 292 | if (set_endian_string == endian_auto) |
b4a20239 | 293 | { |
7a107747 DJ |
294 | target_byte_order_user = BFD_ENDIAN_UNKNOWN; |
295 | if (! gdbarch_update_p (info)) | |
296 | internal_error (__FILE__, __LINE__, | |
297 | _("set_endian: architecture update failed")); | |
b4a20239 AC |
298 | } |
299 | else if (set_endian_string == endian_little) | |
300 | { | |
d90cf509 AC |
301 | info.byte_order = BFD_ENDIAN_LITTLE; |
302 | if (! gdbarch_update_p (info)) | |
edefbb7c | 303 | printf_unfiltered (_("Little endian target not supported by GDB\n")); |
7a107747 DJ |
304 | else |
305 | target_byte_order_user = BFD_ENDIAN_LITTLE; | |
b4a20239 AC |
306 | } |
307 | else if (set_endian_string == endian_big) | |
308 | { | |
d90cf509 AC |
309 | info.byte_order = BFD_ENDIAN_BIG; |
310 | if (! gdbarch_update_p (info)) | |
edefbb7c | 311 | printf_unfiltered (_("Big endian target not supported by GDB\n")); |
7a107747 DJ |
312 | else |
313 | target_byte_order_user = BFD_ENDIAN_BIG; | |
b4a20239 AC |
314 | } |
315 | else | |
8e65ff28 | 316 | internal_error (__FILE__, __LINE__, |
edefbb7c | 317 | _("set_endian: bad value")); |
7a107747 | 318 | |
7ab04401 | 319 | show_endian (gdb_stdout, from_tty, NULL, NULL); |
b4a20239 AC |
320 | } |
321 | ||
23181151 DJ |
322 | /* Given SELECTED, a currently selected BFD architecture, and |
323 | FROM_TARGET, a BFD architecture reported by the target description, | |
324 | return what architecture to use. Either may be NULL; if both are | |
325 | specified, we use the more specific. If the two are obviously | |
326 | incompatible, warn the user. */ | |
327 | ||
328 | static const struct bfd_arch_info * | |
329 | choose_architecture_for_target (const struct bfd_arch_info *selected, | |
330 | const struct bfd_arch_info *from_target) | |
331 | { | |
332 | const struct bfd_arch_info *compat1, *compat2; | |
333 | ||
334 | if (selected == NULL) | |
335 | return from_target; | |
336 | ||
337 | if (from_target == NULL) | |
338 | return selected; | |
339 | ||
340 | /* struct bfd_arch_info objects are singletons: that is, there's | |
341 | supposed to be exactly one instance for a given machine. So you | |
342 | can tell whether two are equivalent by comparing pointers. */ | |
343 | if (from_target == selected) | |
344 | return selected; | |
345 | ||
346 | /* BFD's 'A->compatible (A, B)' functions return zero if A and B are | |
347 | incompatible. But if they are compatible, it returns the 'more | |
348 | featureful' of the two arches. That is, if A can run code | |
349 | written for B, but B can't run code written for A, then it'll | |
350 | return A. | |
351 | ||
352 | Some targets (e.g. MIPS as of 2006-12-04) don't fully | |
353 | implement this, instead always returning NULL or the first | |
354 | argument. We detect that case by checking both directions. */ | |
355 | ||
356 | compat1 = selected->compatible (selected, from_target); | |
357 | compat2 = from_target->compatible (from_target, selected); | |
358 | ||
359 | if (compat1 == NULL && compat2 == NULL) | |
360 | { | |
361 | warning (_("Selected architecture %s is not compatible " | |
362 | "with reported target architecture %s"), | |
363 | selected->printable_name, from_target->printable_name); | |
364 | return selected; | |
365 | } | |
366 | ||
367 | if (compat1 == NULL) | |
368 | return compat2; | |
369 | if (compat2 == NULL) | |
370 | return compat1; | |
371 | if (compat1 == compat2) | |
372 | return compat1; | |
373 | ||
374 | /* If the two didn't match, but one of them was a default architecture, | |
375 | assume the more specific one is correct. This handles the case | |
376 | where an executable or target description just says "mips", but | |
377 | the other knows which MIPS variant. */ | |
378 | if (compat1->the_default) | |
379 | return compat2; | |
380 | if (compat2->the_default) | |
381 | return compat1; | |
382 | ||
383 | /* We have no idea which one is better. This is a bug, but not | |
384 | a critical problem; warn the user. */ | |
385 | warning (_("Selected architecture %s is ambiguous with " | |
386 | "reported target architecture %s"), | |
387 | selected->printable_name, from_target->printable_name); | |
388 | return selected; | |
389 | } | |
390 | ||
b4a20239 AC |
391 | /* Functions to manipulate the architecture of the target */ |
392 | ||
393 | enum set_arch { set_arch_auto, set_arch_manual }; | |
394 | ||
7a107747 | 395 | static const struct bfd_arch_info *target_architecture_user; |
b4a20239 | 396 | |
a8cf2722 AC |
397 | static const char *set_architecture_string; |
398 | ||
399 | const char * | |
400 | selected_architecture_name (void) | |
401 | { | |
7a107747 | 402 | if (target_architecture_user == NULL) |
a8cf2722 AC |
403 | return NULL; |
404 | else | |
405 | return set_architecture_string; | |
406 | } | |
b4a20239 | 407 | |
b4a20239 AC |
408 | /* Called if the user enters ``show architecture'' without an |
409 | argument. */ | |
410 | ||
411 | static void | |
7ab04401 AC |
412 | show_architecture (struct ui_file *file, int from_tty, |
413 | struct cmd_list_element *c, const char *value) | |
b4a20239 | 414 | { |
7a107747 | 415 | if (target_architecture_user == NULL) |
7ab04401 | 416 | fprintf_filtered (file, _("\ |
e17c207e UW |
417 | The target architecture is set automatically (currently %s)\n"), |
418 | gdbarch_bfd_arch_info (get_current_arch ())->printable_name); | |
b4a20239 | 419 | else |
7ab04401 | 420 | fprintf_filtered (file, _("\ |
e17c207e | 421 | The target architecture is assumed to be %s\n"), set_architecture_string); |
b4a20239 AC |
422 | } |
423 | ||
424 | ||
425 | /* Called if the user enters ``set architecture'' with or without an | |
426 | argument. */ | |
427 | ||
428 | static void | |
429 | set_architecture (char *ignore_args, int from_tty, struct cmd_list_element *c) | |
430 | { | |
7a107747 DJ |
431 | struct gdbarch_info info; |
432 | ||
433 | gdbarch_info_init (&info); | |
434 | ||
b4a20239 AC |
435 | if (strcmp (set_architecture_string, "auto") == 0) |
436 | { | |
7a107747 DJ |
437 | target_architecture_user = NULL; |
438 | if (!gdbarch_update_p (info)) | |
439 | internal_error (__FILE__, __LINE__, | |
440 | _("could not select an architecture automatically")); | |
b4a20239 | 441 | } |
d90cf509 | 442 | else |
b4a20239 | 443 | { |
b4a20239 AC |
444 | info.bfd_arch_info = bfd_scan_arch (set_architecture_string); |
445 | if (info.bfd_arch_info == NULL) | |
8e65ff28 | 446 | internal_error (__FILE__, __LINE__, |
edefbb7c | 447 | _("set_architecture: bfd_scan_arch failed")); |
16f33e29 | 448 | if (gdbarch_update_p (info)) |
7a107747 | 449 | target_architecture_user = info.bfd_arch_info; |
b4a20239 | 450 | else |
edefbb7c | 451 | printf_unfiltered (_("Architecture `%s' not recognized.\n"), |
b4a20239 AC |
452 | set_architecture_string); |
453 | } | |
7ab04401 | 454 | show_architecture (gdb_stdout, from_tty, NULL, NULL); |
b4a20239 AC |
455 | } |
456 | ||
ebdba546 AC |
457 | /* Try to select a global architecture that matches "info". Return |
458 | non-zero if the attempt succeds. */ | |
459 | int | |
460 | gdbarch_update_p (struct gdbarch_info info) | |
461 | { | |
a7f1256d UW |
462 | struct gdbarch *new_gdbarch; |
463 | ||
464 | /* Check for the current file. */ | |
465 | if (info.abfd == NULL) | |
466 | info.abfd = exec_bfd; | |
467 | if (info.abfd == NULL) | |
468 | info.abfd = core_bfd; | |
469 | ||
470 | /* Check for the current target description. */ | |
471 | if (info.target_desc == NULL) | |
472 | info.target_desc = target_current_description (); | |
473 | ||
474 | new_gdbarch = gdbarch_find_by_info (info); | |
ebdba546 AC |
475 | |
476 | /* If there no architecture by that name, reject the request. */ | |
477 | if (new_gdbarch == NULL) | |
478 | { | |
479 | if (gdbarch_debug) | |
480 | fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: " | |
481 | "Architecture not found\n"); | |
482 | return 0; | |
483 | } | |
484 | ||
485 | /* If it is the same old architecture, accept the request (but don't | |
486 | swap anything). */ | |
1cf3db46 | 487 | if (new_gdbarch == target_gdbarch) |
ebdba546 AC |
488 | { |
489 | if (gdbarch_debug) | |
490 | fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: " | |
e3cb3832 JB |
491 | "Architecture %s (%s) unchanged\n", |
492 | host_address_to_string (new_gdbarch), | |
ebdba546 AC |
493 | gdbarch_bfd_arch_info (new_gdbarch)->printable_name); |
494 | return 1; | |
495 | } | |
496 | ||
497 | /* It's a new architecture, swap it in. */ | |
498 | if (gdbarch_debug) | |
499 | fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: " | |
e3cb3832 JB |
500 | "New architecture %s (%s) selected\n", |
501 | host_address_to_string (new_gdbarch), | |
ebdba546 | 502 | gdbarch_bfd_arch_info (new_gdbarch)->printable_name); |
59837fe0 | 503 | deprecated_target_gdbarch_select_hack (new_gdbarch); |
ebdba546 AC |
504 | |
505 | return 1; | |
506 | } | |
507 | ||
2b026650 MK |
508 | /* Return the architecture for ABFD. If no suitable architecture |
509 | could be find, return NULL. */ | |
510 | ||
511 | struct gdbarch * | |
512 | gdbarch_from_bfd (bfd *abfd) | |
b4a20239 | 513 | { |
d90cf509 AC |
514 | struct gdbarch_info info; |
515 | gdbarch_info_init (&info); | |
516 | info.abfd = abfd; | |
b60eb90d | 517 | return gdbarch_find_by_info (info); |
2b026650 MK |
518 | } |
519 | ||
520 | /* Set the dynamic target-system-dependent parameters (architecture, | |
521 | byte-order) using information found in the BFD */ | |
522 | ||
523 | void | |
524 | set_gdbarch_from_file (bfd *abfd) | |
525 | { | |
a7f1256d | 526 | struct gdbarch_info info; |
2b026650 MK |
527 | struct gdbarch *gdbarch; |
528 | ||
a7f1256d UW |
529 | gdbarch_info_init (&info); |
530 | info.abfd = abfd; | |
531 | info.target_desc = target_current_description (); | |
532 | gdbarch = gdbarch_find_by_info (info); | |
533 | ||
2b026650 | 534 | if (gdbarch == NULL) |
8a3fe4f8 | 535 | error (_("Architecture of file not recognized.")); |
59837fe0 | 536 | deprecated_target_gdbarch_select_hack (gdbarch); |
b4a20239 AC |
537 | } |
538 | ||
539 | /* Initialize the current architecture. Update the ``set | |
540 | architecture'' command so that it specifies a list of valid | |
541 | architectures. */ | |
542 | ||
1ba607ad AC |
543 | #ifdef DEFAULT_BFD_ARCH |
544 | extern const bfd_arch_info_type DEFAULT_BFD_ARCH; | |
545 | static const bfd_arch_info_type *default_bfd_arch = &DEFAULT_BFD_ARCH; | |
546 | #else | |
4b9b3959 | 547 | static const bfd_arch_info_type *default_bfd_arch; |
1ba607ad AC |
548 | #endif |
549 | ||
550 | #ifdef DEFAULT_BFD_VEC | |
551 | extern const bfd_target DEFAULT_BFD_VEC; | |
552 | static const bfd_target *default_bfd_vec = &DEFAULT_BFD_VEC; | |
553 | #else | |
554 | static const bfd_target *default_bfd_vec; | |
555 | #endif | |
556 | ||
7a107747 DJ |
557 | static int default_byte_order = BFD_ENDIAN_UNKNOWN; |
558 | ||
b4a20239 AC |
559 | void |
560 | initialize_current_architecture (void) | |
561 | { | |
562 | const char **arches = gdbarch_printable_names (); | |
b4a20239 | 563 | |
1ba607ad AC |
564 | /* determine a default architecture and byte order. */ |
565 | struct gdbarch_info info; | |
fb6ecb0f | 566 | gdbarch_info_init (&info); |
1ba607ad AC |
567 | |
568 | /* Find a default architecture. */ | |
7a107747 | 569 | if (default_bfd_arch == NULL) |
b4a20239 | 570 | { |
1ba607ad AC |
571 | /* Choose the architecture by taking the first one |
572 | alphabetically. */ | |
573 | const char *chosen = arches[0]; | |
b4a20239 | 574 | const char **arch; |
b4a20239 AC |
575 | for (arch = arches; *arch != NULL; arch++) |
576 | { | |
b4a20239 AC |
577 | if (strcmp (*arch, chosen) < 0) |
578 | chosen = *arch; | |
579 | } | |
580 | if (chosen == NULL) | |
8e65ff28 | 581 | internal_error (__FILE__, __LINE__, |
edefbb7c | 582 | _("initialize_current_architecture: No arch")); |
7a107747 DJ |
583 | default_bfd_arch = bfd_scan_arch (chosen); |
584 | if (default_bfd_arch == NULL) | |
8e65ff28 | 585 | internal_error (__FILE__, __LINE__, |
edefbb7c | 586 | _("initialize_current_architecture: Arch not found")); |
1ba607ad AC |
587 | } |
588 | ||
7a107747 DJ |
589 | info.bfd_arch_info = default_bfd_arch; |
590 | ||
afe64c1a | 591 | /* Take several guesses at a byte order. */ |
7a107747 | 592 | if (default_byte_order == BFD_ENDIAN_UNKNOWN |
1ba607ad AC |
593 | && default_bfd_vec != NULL) |
594 | { | |
595 | /* Extract BFD's default vector's byte order. */ | |
596 | switch (default_bfd_vec->byteorder) | |
597 | { | |
598 | case BFD_ENDIAN_BIG: | |
7a107747 | 599 | default_byte_order = BFD_ENDIAN_BIG; |
1ba607ad AC |
600 | break; |
601 | case BFD_ENDIAN_LITTLE: | |
7a107747 | 602 | default_byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad AC |
603 | break; |
604 | default: | |
605 | break; | |
606 | } | |
607 | } | |
7a107747 | 608 | if (default_byte_order == BFD_ENDIAN_UNKNOWN) |
1ba607ad AC |
609 | { |
610 | /* look for ``*el-*'' in the target name. */ | |
611 | const char *chp; | |
612 | chp = strchr (target_name, '-'); | |
613 | if (chp != NULL | |
614 | && chp - 2 >= target_name | |
615 | && strncmp (chp - 2, "el", 2) == 0) | |
7a107747 | 616 | default_byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad | 617 | } |
7a107747 | 618 | if (default_byte_order == BFD_ENDIAN_UNKNOWN) |
1ba607ad AC |
619 | { |
620 | /* Wire it to big-endian!!! */ | |
7a107747 | 621 | default_byte_order = BFD_ENDIAN_BIG; |
1ba607ad AC |
622 | } |
623 | ||
7a107747 | 624 | info.byte_order = default_byte_order; |
9d4fde75 | 625 | info.byte_order_for_code = info.byte_order; |
7a107747 | 626 | |
d90cf509 AC |
627 | if (! gdbarch_update_p (info)) |
628 | internal_error (__FILE__, __LINE__, | |
edefbb7c AC |
629 | _("initialize_current_architecture: Selection of " |
630 | "initial architecture failed")); | |
b4a20239 | 631 | |
1ba607ad AC |
632 | /* Create the ``set architecture'' command appending ``auto'' to the |
633 | list of architectures. */ | |
b4a20239 AC |
634 | { |
635 | struct cmd_list_element *c; | |
636 | /* Append ``auto''. */ | |
637 | int nr; | |
638 | for (nr = 0; arches[nr] != NULL; nr++); | |
639 | arches = xrealloc (arches, sizeof (char*) * (nr + 2)); | |
640 | arches[nr + 0] = "auto"; | |
641 | arches[nr + 1] = NULL; | |
7ab04401 AC |
642 | add_setshow_enum_cmd ("architecture", class_support, |
643 | arches, &set_architecture_string, _("\ | |
644 | Set architecture of target."), _("\ | |
645 | Show architecture of target."), NULL, | |
646 | set_architecture, show_architecture, | |
647 | &setlist, &showlist); | |
b4a20239 | 648 | add_alias_cmd ("processor", "architecture", class_support, 1, &setlist); |
b4a20239 AC |
649 | } |
650 | } | |
651 | ||
652 | ||
fb6ecb0f AC |
653 | /* Initialize a gdbarch info to values that will be automatically |
654 | overridden. Note: Originally, this ``struct info'' was initialized | |
ce2826aa | 655 | using memset(0). Unfortunately, that ran into problems, namely |
fb6ecb0f AC |
656 | BFD_ENDIAN_BIG is zero. An explicit initialization function that |
657 | can explicitly set each field to a well defined value is used. */ | |
658 | ||
659 | void | |
660 | gdbarch_info_init (struct gdbarch_info *info) | |
661 | { | |
662 | memset (info, 0, sizeof (struct gdbarch_info)); | |
428721aa | 663 | info->byte_order = BFD_ENDIAN_UNKNOWN; |
9d4fde75 | 664 | info->byte_order_for_code = info->byte_order; |
4be87837 | 665 | info->osabi = GDB_OSABI_UNINITIALIZED; |
fb6ecb0f AC |
666 | } |
667 | ||
100bcc3f | 668 | /* Similar to init, but this time fill in the blanks. Information is |
7a107747 DJ |
669 | obtained from the global "set ..." options and explicitly |
670 | initialized INFO fields. */ | |
bf922ad9 AC |
671 | |
672 | void | |
7a107747 | 673 | gdbarch_info_fill (struct gdbarch_info *info) |
bf922ad9 AC |
674 | { |
675 | /* "(gdb) set architecture ...". */ | |
676 | if (info->bfd_arch_info == NULL | |
7a107747 DJ |
677 | && target_architecture_user) |
678 | info->bfd_arch_info = target_architecture_user; | |
424163ea | 679 | /* From the file. */ |
bf922ad9 AC |
680 | if (info->bfd_arch_info == NULL |
681 | && info->abfd != NULL | |
682 | && bfd_get_arch (info->abfd) != bfd_arch_unknown | |
683 | && bfd_get_arch (info->abfd) != bfd_arch_obscure) | |
684 | info->bfd_arch_info = bfd_get_arch_info (info->abfd); | |
23181151 DJ |
685 | /* From the target. */ |
686 | if (info->target_desc != NULL) | |
687 | info->bfd_arch_info = choose_architecture_for_target | |
688 | (info->bfd_arch_info, tdesc_architecture (info->target_desc)); | |
7a107747 DJ |
689 | /* From the default. */ |
690 | if (info->bfd_arch_info == NULL) | |
691 | info->bfd_arch_info = default_bfd_arch; | |
bf922ad9 AC |
692 | |
693 | /* "(gdb) set byte-order ...". */ | |
694 | if (info->byte_order == BFD_ENDIAN_UNKNOWN | |
7a107747 DJ |
695 | && target_byte_order_user != BFD_ENDIAN_UNKNOWN) |
696 | info->byte_order = target_byte_order_user; | |
bf922ad9 AC |
697 | /* From the INFO struct. */ |
698 | if (info->byte_order == BFD_ENDIAN_UNKNOWN | |
699 | && info->abfd != NULL) | |
700 | info->byte_order = (bfd_big_endian (info->abfd) ? BFD_ENDIAN_BIG | |
7a107747 DJ |
701 | : bfd_little_endian (info->abfd) ? BFD_ENDIAN_LITTLE |
702 | : BFD_ENDIAN_UNKNOWN); | |
703 | /* From the default. */ | |
704 | if (info->byte_order == BFD_ENDIAN_UNKNOWN) | |
705 | info->byte_order = default_byte_order; | |
9d4fde75 | 706 | info->byte_order_for_code = info->byte_order; |
bf922ad9 AC |
707 | |
708 | /* "(gdb) set osabi ...". Handled by gdbarch_lookup_osabi. */ | |
08d16641 | 709 | /* From the manual override, or from file. */ |
bf922ad9 AC |
710 | if (info->osabi == GDB_OSABI_UNINITIALIZED) |
711 | info->osabi = gdbarch_lookup_osabi (info->abfd); | |
08d16641 PA |
712 | /* From the target. */ |
713 | if (info->osabi == GDB_OSABI_UNKNOWN && info->target_desc != NULL) | |
714 | info->osabi = tdesc_osabi (info->target_desc); | |
715 | /* From the configured default. */ | |
f4290e2a | 716 | #ifdef GDB_OSABI_DEFAULT |
08d16641 PA |
717 | if (info->osabi == GDB_OSABI_UNKNOWN) |
718 | info->osabi = GDB_OSABI_DEFAULT; | |
f4290e2a | 719 | #endif |
bf922ad9 AC |
720 | |
721 | /* Must have at least filled in the architecture. */ | |
722 | gdb_assert (info->bfd_arch_info != NULL); | |
723 | } | |
724 | ||
e17c207e UW |
725 | /* Return "current" architecture. If the target is running, this is the |
726 | architecture of the selected frame. Otherwise, the "current" architecture | |
727 | defaults to the target architecture. | |
728 | ||
729 | This function should normally be called solely by the command interpreter | |
730 | routines to determine the architecture to execute a command in. */ | |
731 | struct gdbarch * | |
732 | get_current_arch (void) | |
733 | { | |
734 | if (has_stack_frames ()) | |
735 | return get_frame_arch (get_selected_frame (NULL)); | |
736 | else | |
737 | return target_gdbarch; | |
738 | } | |
739 | ||
c0e8c252 AC |
740 | /* */ |
741 | ||
a78f21af | 742 | extern initialize_file_ftype _initialize_gdbarch_utils; /* -Wmissing-prototypes */ |
c0e8c252 AC |
743 | |
744 | void | |
b4a20239 | 745 | _initialize_gdbarch_utils (void) |
c0e8c252 | 746 | { |
b4a20239 | 747 | struct cmd_list_element *c; |
7ab04401 AC |
748 | add_setshow_enum_cmd ("endian", class_support, |
749 | endian_enum, &set_endian_string, _("\ | |
750 | Set endianness of target."), _("\ | |
751 | Show endianness of target."), NULL, | |
752 | set_endian, show_endian, | |
753 | &setlist, &showlist); | |
c0e8c252 | 754 | } |