Commit | Line | Data |
---|---|---|
c0e8c252 | 1 | /* Dynamic architecture support for GDB, the GNU debugger. |
f4f9705a | 2 | |
ecd75fc8 | 3 | Copyright (C) 1998-2014 Free Software Foundation, Inc. |
c0e8c252 AC |
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 |
c0e8c252 AC |
10 | (at your option) any later version. |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
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. | |
16 | ||
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/>. */ |
c0e8c252 AC |
19 | |
20 | #include "defs.h" | |
21 | ||
fb6ecb0f | 22 | #include "arch-utils.h" |
192cb3d4 | 23 | #include "buildsym.h" |
c0e8c252 | 24 | #include "gdbcmd.h" |
0e2de366 | 25 | #include "inferior.h" /* enum CALL_DUMMY_LOCATION et al. */ |
45741a9c | 26 | #include "infrun.h" |
fbec36e2 | 27 | #include "regcache.h" |
4182591f | 28 | #include "sim-regno.h" |
750eb019 | 29 | #include "gdbcore.h" |
bf922ad9 | 30 | #include "osabi.h" |
424163ea | 31 | #include "target-descriptions.h" |
237fc4c9 | 32 | #include "objfiles.h" |
18648a37 | 33 | #include "language.h" |
bf922ad9 | 34 | |
1ba607ad AC |
35 | #include "version.h" |
36 | ||
f0d4cc9e AC |
37 | #include "floatformat.h" |
38 | ||
1fd35568 | 39 | |
237fc4c9 PA |
40 | struct displaced_step_closure * |
41 | simple_displaced_step_copy_insn (struct gdbarch *gdbarch, | |
42 | CORE_ADDR from, CORE_ADDR to, | |
43 | struct regcache *regs) | |
44 | { | |
45 | size_t len = gdbarch_max_insn_length (gdbarch); | |
46 | gdb_byte *buf = xmalloc (len); | |
47 | ||
48 | read_memory (from, buf, len); | |
49 | write_memory (to, buf, len); | |
50 | ||
51 | if (debug_displaced) | |
52 | { | |
5af949e3 UW |
53 | fprintf_unfiltered (gdb_stdlog, "displaced: copy %s->%s: ", |
54 | paddress (gdbarch, from), paddress (gdbarch, to)); | |
237fc4c9 PA |
55 | displaced_step_dump_bytes (gdb_stdlog, buf, len); |
56 | } | |
57 | ||
58 | return (struct displaced_step_closure *) buf; | |
59 | } | |
60 | ||
61 | ||
62 | void | |
63 | simple_displaced_step_free_closure (struct gdbarch *gdbarch, | |
64 | struct displaced_step_closure *closure) | |
65 | { | |
66 | xfree (closure); | |
67 | } | |
68 | ||
99e40580 UW |
69 | int |
70 | default_displaced_step_hw_singlestep (struct gdbarch *gdbarch, | |
71 | struct displaced_step_closure *closure) | |
72 | { | |
73 | return !gdbarch_software_single_step_p (gdbarch); | |
74 | } | |
237fc4c9 PA |
75 | |
76 | CORE_ADDR | |
77 | displaced_step_at_entry_point (struct gdbarch *gdbarch) | |
78 | { | |
79 | CORE_ADDR addr; | |
80 | int bp_len; | |
81 | ||
82 | addr = entry_point_address (); | |
83 | ||
237fc4c9 PA |
84 | /* Inferior calls also use the entry point as a breakpoint location. |
85 | We don't want displaced stepping to interfere with those | |
86 | breakpoints, so leave space. */ | |
87 | gdbarch_breakpoint_from_pc (gdbarch, &addr, &bp_len); | |
5931a2fa | 88 | addr += bp_len * 2; |
237fc4c9 PA |
89 | |
90 | return addr; | |
91 | } | |
92 | ||
4182591f | 93 | int |
e7faf938 | 94 | legacy_register_sim_regno (struct gdbarch *gdbarch, int regnum) |
4182591f AC |
95 | { |
96 | /* Only makes sense to supply raw registers. */ | |
e7faf938 | 97 | gdb_assert (regnum >= 0 && regnum < gdbarch_num_regs (gdbarch)); |
4182591f AC |
98 | /* NOTE: cagney/2002-05-13: The old code did it this way and it is |
99 | suspected that some GDB/SIM combinations may rely on this | |
100 | behavour. The default should be one2one_register_sim_regno | |
101 | (below). */ | |
e7faf938 MD |
102 | if (gdbarch_register_name (gdbarch, regnum) != NULL |
103 | && gdbarch_register_name (gdbarch, regnum)[0] != '\0') | |
4182591f AC |
104 | return regnum; |
105 | else | |
106 | return LEGACY_SIM_REGNO_IGNORE; | |
107 | } | |
108 | ||
bdcd319a | 109 | CORE_ADDR |
52f729a7 | 110 | generic_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc) |
bdcd319a CV |
111 | { |
112 | return 0; | |
113 | } | |
114 | ||
dea0c52f | 115 | CORE_ADDR |
4c8c40e6 | 116 | generic_skip_solib_resolver (struct gdbarch *gdbarch, CORE_ADDR pc) |
dea0c52f MK |
117 | { |
118 | return 0; | |
119 | } | |
120 | ||
d50355b6 | 121 | int |
e17a4113 | 122 | generic_in_solib_return_trampoline (struct gdbarch *gdbarch, |
2c02bd72 | 123 | CORE_ADDR pc, const char *name) |
d50355b6 MS |
124 | { |
125 | return 0; | |
126 | } | |
127 | ||
c12260ac CV |
128 | int |
129 | generic_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc) | |
130 | { | |
131 | return 0; | |
132 | } | |
133 | ||
4d1e7dd1 | 134 | /* Helper functions for gdbarch_inner_than */ |
3339cf8b AC |
135 | |
136 | int | |
fba45db2 | 137 | core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs) |
3339cf8b AC |
138 | { |
139 | return (lhs < rhs); | |
140 | } | |
141 | ||
142 | int | |
fba45db2 | 143 | core_addr_greaterthan (CORE_ADDR lhs, CORE_ADDR rhs) |
3339cf8b AC |
144 | { |
145 | return (lhs > rhs); | |
146 | } | |
147 | ||
0e2de366 | 148 | /* Misc helper functions for targets. */ |
193e3b1a | 149 | |
f517ea4e | 150 | CORE_ADDR |
24568a2c | 151 | core_addr_identity (struct gdbarch *gdbarch, CORE_ADDR addr) |
f517ea4e PS |
152 | { |
153 | return addr; | |
154 | } | |
155 | ||
e2d0e7eb AC |
156 | CORE_ADDR |
157 | convert_from_func_ptr_addr_identity (struct gdbarch *gdbarch, CORE_ADDR addr, | |
158 | struct target_ops *targ) | |
159 | { | |
160 | return addr; | |
161 | } | |
162 | ||
88c72b7d | 163 | int |
d3f73121 | 164 | no_op_reg_to_regnum (struct gdbarch *gdbarch, int reg) |
88c72b7d AC |
165 | { |
166 | return reg; | |
167 | } | |
168 | ||
a2cf933a EZ |
169 | void |
170 | default_elf_make_msymbol_special (asymbol *sym, struct minimal_symbol *msym) | |
171 | { | |
172 | return; | |
173 | } | |
174 | ||
175 | void | |
176 | default_coff_make_msymbol_special (int val, struct minimal_symbol *msym) | |
177 | { | |
178 | return; | |
179 | } | |
180 | ||
01fb7433 | 181 | int |
64a3914f | 182 | cannot_register_not (struct gdbarch *gdbarch, int regnum) |
01fb7433 AC |
183 | { |
184 | return 0; | |
185 | } | |
39d4ef09 AC |
186 | |
187 | /* Legacy version of target_virtual_frame_pointer(). Assumes that | |
0e2de366 MS |
188 | there is an gdbarch_deprecated_fp_regnum and that it is the same, |
189 | cooked or raw. */ | |
39d4ef09 AC |
190 | |
191 | void | |
a54fba4c MD |
192 | legacy_virtual_frame_pointer (struct gdbarch *gdbarch, |
193 | CORE_ADDR pc, | |
39d4ef09 AC |
194 | int *frame_regnum, |
195 | LONGEST *frame_offset) | |
196 | { | |
20bcf01c AC |
197 | /* FIXME: cagney/2002-09-13: This code is used when identifying the |
198 | frame pointer of the current PC. It is assuming that a single | |
199 | register and an offset can determine this. I think it should | |
200 | instead generate a byte code expression as that would work better | |
201 | with things like Dwarf2's CFI. */ | |
a54fba4c MD |
202 | if (gdbarch_deprecated_fp_regnum (gdbarch) >= 0 |
203 | && gdbarch_deprecated_fp_regnum (gdbarch) | |
204 | < gdbarch_num_regs (gdbarch)) | |
205 | *frame_regnum = gdbarch_deprecated_fp_regnum (gdbarch); | |
206 | else if (gdbarch_sp_regnum (gdbarch) >= 0 | |
207 | && gdbarch_sp_regnum (gdbarch) | |
208 | < gdbarch_num_regs (gdbarch)) | |
209 | *frame_regnum = gdbarch_sp_regnum (gdbarch); | |
20bcf01c AC |
210 | else |
211 | /* Should this be an internal error? I guess so, it is reflecting | |
212 | an architectural limitation in the current design. */ | |
0e2de366 MS |
213 | internal_error (__FILE__, __LINE__, |
214 | _("No virtual frame pointer available")); | |
39d4ef09 AC |
215 | *frame_offset = 0; |
216 | } | |
46cd78fb | 217 | |
d7bd68ca | 218 | \f |
13d01224 | 219 | int |
76a8ddb9 UW |
220 | generic_convert_register_p (struct gdbarch *gdbarch, int regnum, |
221 | struct type *type) | |
13d01224 | 222 | { |
9730f241 | 223 | return 0; |
13d01224 AC |
224 | } |
225 | ||
192cb3d4 MK |
226 | int |
227 | default_stabs_argument_has_addr (struct gdbarch *gdbarch, struct type *type) | |
228 | { | |
192cb3d4 MK |
229 | return 0; |
230 | } | |
231 | ||
3ca64954 RC |
232 | int |
233 | generic_instruction_nullified (struct gdbarch *gdbarch, | |
234 | struct regcache *regcache) | |
235 | { | |
236 | return 0; | |
237 | } | |
238 | ||
123dc839 DJ |
239 | int |
240 | default_remote_register_number (struct gdbarch *gdbarch, | |
241 | int regno) | |
242 | { | |
243 | return regno; | |
244 | } | |
245 | ||
3437254d PA |
246 | /* See arch-utils.h. */ |
247 | ||
248 | int | |
249 | default_vsyscall_range (struct gdbarch *gdbarch, struct mem_range *range) | |
250 | { | |
251 | return 0; | |
252 | } | |
253 | ||
01fb7433 | 254 | \f |
b4a20239 AC |
255 | /* Functions to manipulate the endianness of the target. */ |
256 | ||
7a107747 | 257 | static int target_byte_order_user = BFD_ENDIAN_UNKNOWN; |
b4a20239 | 258 | |
53904c9e AC |
259 | static const char endian_big[] = "big"; |
260 | static const char endian_little[] = "little"; | |
261 | static const char endian_auto[] = "auto"; | |
40478521 | 262 | static const char *const endian_enum[] = |
b4a20239 AC |
263 | { |
264 | endian_big, | |
265 | endian_little, | |
266 | endian_auto, | |
267 | NULL, | |
268 | }; | |
53904c9e | 269 | static const char *set_endian_string; |
b4a20239 | 270 | |
b6d373df DJ |
271 | enum bfd_endian |
272 | selected_byte_order (void) | |
273 | { | |
e17c207e | 274 | return target_byte_order_user; |
b6d373df DJ |
275 | } |
276 | ||
b4a20239 AC |
277 | /* Called by ``show endian''. */ |
278 | ||
279 | static void | |
7ab04401 AC |
280 | show_endian (struct ui_file *file, int from_tty, struct cmd_list_element *c, |
281 | const char *value) | |
b4a20239 | 282 | { |
7b6b9e83 | 283 | if (target_byte_order_user == BFD_ENDIAN_UNKNOWN) |
e17c207e | 284 | if (gdbarch_byte_order (get_current_arch ()) == BFD_ENDIAN_BIG) |
7ab04401 AC |
285 | fprintf_unfiltered (file, _("The target endianness is set automatically " |
286 | "(currently big endian)\n")); | |
edefbb7c | 287 | else |
7ab04401 | 288 | fprintf_unfiltered (file, _("The target endianness is set automatically " |
3e43a32a | 289 | "(currently little endian)\n")); |
b4a20239 | 290 | else |
e17c207e | 291 | if (target_byte_order_user == BFD_ENDIAN_BIG) |
7ab04401 AC |
292 | fprintf_unfiltered (file, |
293 | _("The target is assumed to be big endian\n")); | |
294 | else | |
295 | fprintf_unfiltered (file, | |
296 | _("The target is assumed to be little endian\n")); | |
b4a20239 AC |
297 | } |
298 | ||
299 | static void | |
300 | set_endian (char *ignore_args, int from_tty, struct cmd_list_element *c) | |
301 | { | |
7a107747 DJ |
302 | struct gdbarch_info info; |
303 | ||
304 | gdbarch_info_init (&info); | |
305 | ||
3fd3d7d2 | 306 | if (set_endian_string == endian_auto) |
b4a20239 | 307 | { |
7a107747 DJ |
308 | target_byte_order_user = BFD_ENDIAN_UNKNOWN; |
309 | if (! gdbarch_update_p (info)) | |
310 | internal_error (__FILE__, __LINE__, | |
311 | _("set_endian: architecture update failed")); | |
b4a20239 AC |
312 | } |
313 | else if (set_endian_string == endian_little) | |
314 | { | |
d90cf509 AC |
315 | info.byte_order = BFD_ENDIAN_LITTLE; |
316 | if (! gdbarch_update_p (info)) | |
edefbb7c | 317 | printf_unfiltered (_("Little endian target not supported by GDB\n")); |
7a107747 DJ |
318 | else |
319 | target_byte_order_user = BFD_ENDIAN_LITTLE; | |
b4a20239 AC |
320 | } |
321 | else if (set_endian_string == endian_big) | |
322 | { | |
d90cf509 AC |
323 | info.byte_order = BFD_ENDIAN_BIG; |
324 | if (! gdbarch_update_p (info)) | |
edefbb7c | 325 | printf_unfiltered (_("Big endian target not supported by GDB\n")); |
7a107747 DJ |
326 | else |
327 | target_byte_order_user = BFD_ENDIAN_BIG; | |
b4a20239 AC |
328 | } |
329 | else | |
8e65ff28 | 330 | internal_error (__FILE__, __LINE__, |
edefbb7c | 331 | _("set_endian: bad value")); |
7a107747 | 332 | |
7ab04401 | 333 | show_endian (gdb_stdout, from_tty, NULL, NULL); |
b4a20239 AC |
334 | } |
335 | ||
23181151 | 336 | /* Given SELECTED, a currently selected BFD architecture, and |
e35359c5 UW |
337 | TARGET_DESC, the current target description, return what |
338 | architecture to use. | |
339 | ||
340 | SELECTED may be NULL, in which case we return the architecture | |
341 | associated with TARGET_DESC. If SELECTED specifies a variant | |
342 | of the architecture associtated with TARGET_DESC, return the | |
343 | more specific of the two. | |
344 | ||
345 | If SELECTED is a different architecture, but it is accepted as | |
346 | compatible by the target, we can use the target architecture. | |
347 | ||
348 | If SELECTED is obviously incompatible, warn the user. */ | |
23181151 DJ |
349 | |
350 | static const struct bfd_arch_info * | |
e35359c5 UW |
351 | choose_architecture_for_target (const struct target_desc *target_desc, |
352 | const struct bfd_arch_info *selected) | |
23181151 | 353 | { |
e35359c5 | 354 | const struct bfd_arch_info *from_target = tdesc_architecture (target_desc); |
23181151 DJ |
355 | const struct bfd_arch_info *compat1, *compat2; |
356 | ||
357 | if (selected == NULL) | |
358 | return from_target; | |
359 | ||
360 | if (from_target == NULL) | |
361 | return selected; | |
362 | ||
363 | /* struct bfd_arch_info objects are singletons: that is, there's | |
364 | supposed to be exactly one instance for a given machine. So you | |
365 | can tell whether two are equivalent by comparing pointers. */ | |
366 | if (from_target == selected) | |
367 | return selected; | |
368 | ||
369 | /* BFD's 'A->compatible (A, B)' functions return zero if A and B are | |
370 | incompatible. But if they are compatible, it returns the 'more | |
371 | featureful' of the two arches. That is, if A can run code | |
372 | written for B, but B can't run code written for A, then it'll | |
373 | return A. | |
374 | ||
375 | Some targets (e.g. MIPS as of 2006-12-04) don't fully | |
376 | implement this, instead always returning NULL or the first | |
377 | argument. We detect that case by checking both directions. */ | |
378 | ||
379 | compat1 = selected->compatible (selected, from_target); | |
380 | compat2 = from_target->compatible (from_target, selected); | |
381 | ||
382 | if (compat1 == NULL && compat2 == NULL) | |
383 | { | |
0e2de366 MS |
384 | /* BFD considers the architectures incompatible. Check our |
385 | target description whether it accepts SELECTED as compatible | |
386 | anyway. */ | |
e35359c5 UW |
387 | if (tdesc_compatible_p (target_desc, selected)) |
388 | return from_target; | |
389 | ||
23181151 DJ |
390 | warning (_("Selected architecture %s is not compatible " |
391 | "with reported target architecture %s"), | |
392 | selected->printable_name, from_target->printable_name); | |
393 | return selected; | |
394 | } | |
395 | ||
396 | if (compat1 == NULL) | |
397 | return compat2; | |
398 | if (compat2 == NULL) | |
399 | return compat1; | |
400 | if (compat1 == compat2) | |
401 | return compat1; | |
402 | ||
0e2de366 MS |
403 | /* If the two didn't match, but one of them was a default |
404 | architecture, assume the more specific one is correct. This | |
405 | handles the case where an executable or target description just | |
406 | says "mips", but the other knows which MIPS variant. */ | |
23181151 DJ |
407 | if (compat1->the_default) |
408 | return compat2; | |
409 | if (compat2->the_default) | |
410 | return compat1; | |
411 | ||
412 | /* We have no idea which one is better. This is a bug, but not | |
413 | a critical problem; warn the user. */ | |
414 | warning (_("Selected architecture %s is ambiguous with " | |
415 | "reported target architecture %s"), | |
416 | selected->printable_name, from_target->printable_name); | |
417 | return selected; | |
418 | } | |
419 | ||
0e2de366 | 420 | /* Functions to manipulate the architecture of the target. */ |
b4a20239 AC |
421 | |
422 | enum set_arch { set_arch_auto, set_arch_manual }; | |
423 | ||
7a107747 | 424 | static const struct bfd_arch_info *target_architecture_user; |
b4a20239 | 425 | |
a8cf2722 AC |
426 | static const char *set_architecture_string; |
427 | ||
428 | const char * | |
429 | selected_architecture_name (void) | |
430 | { | |
7a107747 | 431 | if (target_architecture_user == NULL) |
a8cf2722 AC |
432 | return NULL; |
433 | else | |
434 | return set_architecture_string; | |
435 | } | |
b4a20239 | 436 | |
b4a20239 | 437 | /* Called if the user enters ``show architecture'' without an |
0e2de366 | 438 | argument. */ |
b4a20239 AC |
439 | |
440 | static void | |
7ab04401 AC |
441 | show_architecture (struct ui_file *file, int from_tty, |
442 | struct cmd_list_element *c, const char *value) | |
b4a20239 | 443 | { |
7a107747 | 444 | if (target_architecture_user == NULL) |
3e43a32a MS |
445 | fprintf_filtered (file, _("The target architecture is set " |
446 | "automatically (currently %s)\n"), | |
447 | gdbarch_bfd_arch_info (get_current_arch ())->printable_name); | |
b4a20239 | 448 | else |
3e43a32a MS |
449 | fprintf_filtered (file, _("The target architecture is assumed to be %s\n"), |
450 | set_architecture_string); | |
b4a20239 AC |
451 | } |
452 | ||
453 | ||
454 | /* Called if the user enters ``set architecture'' with or without an | |
0e2de366 | 455 | argument. */ |
b4a20239 AC |
456 | |
457 | static void | |
458 | set_architecture (char *ignore_args, int from_tty, struct cmd_list_element *c) | |
459 | { | |
7a107747 DJ |
460 | struct gdbarch_info info; |
461 | ||
462 | gdbarch_info_init (&info); | |
463 | ||
b4a20239 AC |
464 | if (strcmp (set_architecture_string, "auto") == 0) |
465 | { | |
7a107747 DJ |
466 | target_architecture_user = NULL; |
467 | if (!gdbarch_update_p (info)) | |
468 | internal_error (__FILE__, __LINE__, | |
469 | _("could not select an architecture automatically")); | |
b4a20239 | 470 | } |
d90cf509 | 471 | else |
b4a20239 | 472 | { |
b4a20239 AC |
473 | info.bfd_arch_info = bfd_scan_arch (set_architecture_string); |
474 | if (info.bfd_arch_info == NULL) | |
8e65ff28 | 475 | internal_error (__FILE__, __LINE__, |
edefbb7c | 476 | _("set_architecture: bfd_scan_arch failed")); |
16f33e29 | 477 | if (gdbarch_update_p (info)) |
7a107747 | 478 | target_architecture_user = info.bfd_arch_info; |
b4a20239 | 479 | else |
edefbb7c | 480 | printf_unfiltered (_("Architecture `%s' not recognized.\n"), |
b4a20239 AC |
481 | set_architecture_string); |
482 | } | |
7ab04401 | 483 | show_architecture (gdb_stdout, from_tty, NULL, NULL); |
b4a20239 AC |
484 | } |
485 | ||
ebdba546 | 486 | /* Try to select a global architecture that matches "info". Return |
0f9741f2 | 487 | non-zero if the attempt succeeds. */ |
ebdba546 AC |
488 | int |
489 | gdbarch_update_p (struct gdbarch_info info) | |
490 | { | |
a7f1256d UW |
491 | struct gdbarch *new_gdbarch; |
492 | ||
493 | /* Check for the current file. */ | |
494 | if (info.abfd == NULL) | |
495 | info.abfd = exec_bfd; | |
496 | if (info.abfd == NULL) | |
497 | info.abfd = core_bfd; | |
498 | ||
499 | /* Check for the current target description. */ | |
500 | if (info.target_desc == NULL) | |
501 | info.target_desc = target_current_description (); | |
502 | ||
503 | new_gdbarch = gdbarch_find_by_info (info); | |
ebdba546 AC |
504 | |
505 | /* If there no architecture by that name, reject the request. */ | |
506 | if (new_gdbarch == NULL) | |
507 | { | |
508 | if (gdbarch_debug) | |
509 | fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: " | |
510 | "Architecture not found\n"); | |
511 | return 0; | |
512 | } | |
513 | ||
514 | /* If it is the same old architecture, accept the request (but don't | |
515 | swap anything). */ | |
f5656ead | 516 | if (new_gdbarch == target_gdbarch ()) |
ebdba546 AC |
517 | { |
518 | if (gdbarch_debug) | |
519 | fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: " | |
e3cb3832 JB |
520 | "Architecture %s (%s) unchanged\n", |
521 | host_address_to_string (new_gdbarch), | |
ebdba546 AC |
522 | gdbarch_bfd_arch_info (new_gdbarch)->printable_name); |
523 | return 1; | |
524 | } | |
525 | ||
526 | /* It's a new architecture, swap it in. */ | |
527 | if (gdbarch_debug) | |
528 | fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: " | |
e3cb3832 JB |
529 | "New architecture %s (%s) selected\n", |
530 | host_address_to_string (new_gdbarch), | |
ebdba546 | 531 | gdbarch_bfd_arch_info (new_gdbarch)->printable_name); |
aff68abb | 532 | set_target_gdbarch (new_gdbarch); |
ebdba546 AC |
533 | |
534 | return 1; | |
535 | } | |
536 | ||
2b026650 MK |
537 | /* Return the architecture for ABFD. If no suitable architecture |
538 | could be find, return NULL. */ | |
539 | ||
540 | struct gdbarch * | |
541 | gdbarch_from_bfd (bfd *abfd) | |
b4a20239 | 542 | { |
d90cf509 AC |
543 | struct gdbarch_info info; |
544 | gdbarch_info_init (&info); | |
05c547f6 | 545 | |
d90cf509 | 546 | info.abfd = abfd; |
b60eb90d | 547 | return gdbarch_find_by_info (info); |
2b026650 MK |
548 | } |
549 | ||
550 | /* Set the dynamic target-system-dependent parameters (architecture, | |
551 | byte-order) using information found in the BFD */ | |
552 | ||
553 | void | |
554 | set_gdbarch_from_file (bfd *abfd) | |
555 | { | |
a7f1256d | 556 | struct gdbarch_info info; |
2b026650 MK |
557 | struct gdbarch *gdbarch; |
558 | ||
a7f1256d UW |
559 | gdbarch_info_init (&info); |
560 | info.abfd = abfd; | |
561 | info.target_desc = target_current_description (); | |
562 | gdbarch = gdbarch_find_by_info (info); | |
563 | ||
2b026650 | 564 | if (gdbarch == NULL) |
8a3fe4f8 | 565 | error (_("Architecture of file not recognized.")); |
aff68abb | 566 | set_target_gdbarch (gdbarch); |
b4a20239 AC |
567 | } |
568 | ||
569 | /* Initialize the current architecture. Update the ``set | |
570 | architecture'' command so that it specifies a list of valid | |
571 | architectures. */ | |
572 | ||
1ba607ad AC |
573 | #ifdef DEFAULT_BFD_ARCH |
574 | extern const bfd_arch_info_type DEFAULT_BFD_ARCH; | |
575 | static const bfd_arch_info_type *default_bfd_arch = &DEFAULT_BFD_ARCH; | |
576 | #else | |
4b9b3959 | 577 | static const bfd_arch_info_type *default_bfd_arch; |
1ba607ad AC |
578 | #endif |
579 | ||
580 | #ifdef DEFAULT_BFD_VEC | |
581 | extern const bfd_target DEFAULT_BFD_VEC; | |
582 | static const bfd_target *default_bfd_vec = &DEFAULT_BFD_VEC; | |
583 | #else | |
584 | static const bfd_target *default_bfd_vec; | |
585 | #endif | |
586 | ||
7a107747 DJ |
587 | static int default_byte_order = BFD_ENDIAN_UNKNOWN; |
588 | ||
b4a20239 AC |
589 | void |
590 | initialize_current_architecture (void) | |
591 | { | |
592 | const char **arches = gdbarch_printable_names (); | |
05c547f6 | 593 | struct gdbarch_info info; |
b4a20239 | 594 | |
0e2de366 | 595 | /* determine a default architecture and byte order. */ |
fb6ecb0f | 596 | gdbarch_info_init (&info); |
1ba607ad | 597 | |
0e2de366 | 598 | /* Find a default architecture. */ |
7a107747 | 599 | if (default_bfd_arch == NULL) |
b4a20239 | 600 | { |
1ba607ad | 601 | /* Choose the architecture by taking the first one |
0e2de366 | 602 | alphabetically. */ |
1ba607ad | 603 | const char *chosen = arches[0]; |
b4a20239 | 604 | const char **arch; |
b4a20239 AC |
605 | for (arch = arches; *arch != NULL; arch++) |
606 | { | |
b4a20239 AC |
607 | if (strcmp (*arch, chosen) < 0) |
608 | chosen = *arch; | |
609 | } | |
610 | if (chosen == NULL) | |
8e65ff28 | 611 | internal_error (__FILE__, __LINE__, |
edefbb7c | 612 | _("initialize_current_architecture: No arch")); |
7a107747 DJ |
613 | default_bfd_arch = bfd_scan_arch (chosen); |
614 | if (default_bfd_arch == NULL) | |
8e65ff28 | 615 | internal_error (__FILE__, __LINE__, |
edefbb7c | 616 | _("initialize_current_architecture: Arch not found")); |
1ba607ad AC |
617 | } |
618 | ||
7a107747 DJ |
619 | info.bfd_arch_info = default_bfd_arch; |
620 | ||
afe64c1a | 621 | /* Take several guesses at a byte order. */ |
7a107747 | 622 | if (default_byte_order == BFD_ENDIAN_UNKNOWN |
1ba607ad AC |
623 | && default_bfd_vec != NULL) |
624 | { | |
0e2de366 | 625 | /* Extract BFD's default vector's byte order. */ |
1ba607ad AC |
626 | switch (default_bfd_vec->byteorder) |
627 | { | |
628 | case BFD_ENDIAN_BIG: | |
7a107747 | 629 | default_byte_order = BFD_ENDIAN_BIG; |
1ba607ad AC |
630 | break; |
631 | case BFD_ENDIAN_LITTLE: | |
7a107747 | 632 | default_byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad AC |
633 | break; |
634 | default: | |
635 | break; | |
636 | } | |
637 | } | |
7a107747 | 638 | if (default_byte_order == BFD_ENDIAN_UNKNOWN) |
1ba607ad | 639 | { |
0e2de366 | 640 | /* look for ``*el-*'' in the target name. */ |
1ba607ad AC |
641 | const char *chp; |
642 | chp = strchr (target_name, '-'); | |
643 | if (chp != NULL | |
644 | && chp - 2 >= target_name | |
645 | && strncmp (chp - 2, "el", 2) == 0) | |
7a107747 | 646 | default_byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad | 647 | } |
7a107747 | 648 | if (default_byte_order == BFD_ENDIAN_UNKNOWN) |
1ba607ad AC |
649 | { |
650 | /* Wire it to big-endian!!! */ | |
7a107747 | 651 | default_byte_order = BFD_ENDIAN_BIG; |
1ba607ad AC |
652 | } |
653 | ||
7a107747 | 654 | info.byte_order = default_byte_order; |
9d4fde75 | 655 | info.byte_order_for_code = info.byte_order; |
7a107747 | 656 | |
d90cf509 AC |
657 | if (! gdbarch_update_p (info)) |
658 | internal_error (__FILE__, __LINE__, | |
edefbb7c AC |
659 | _("initialize_current_architecture: Selection of " |
660 | "initial architecture failed")); | |
b4a20239 | 661 | |
1ba607ad | 662 | /* Create the ``set architecture'' command appending ``auto'' to the |
0e2de366 | 663 | list of architectures. */ |
b4a20239 | 664 | { |
0e2de366 | 665 | /* Append ``auto''. */ |
b4a20239 AC |
666 | int nr; |
667 | for (nr = 0; arches[nr] != NULL; nr++); | |
668 | arches = xrealloc (arches, sizeof (char*) * (nr + 2)); | |
669 | arches[nr + 0] = "auto"; | |
670 | arches[nr + 1] = NULL; | |
7ab04401 | 671 | add_setshow_enum_cmd ("architecture", class_support, |
3e43a32a MS |
672 | arches, &set_architecture_string, |
673 | _("Set architecture of target."), | |
674 | _("Show architecture of target."), NULL, | |
7ab04401 AC |
675 | set_architecture, show_architecture, |
676 | &setlist, &showlist); | |
b4a20239 | 677 | add_alias_cmd ("processor", "architecture", class_support, 1, &setlist); |
b4a20239 AC |
678 | } |
679 | } | |
680 | ||
681 | ||
fb6ecb0f AC |
682 | /* Initialize a gdbarch info to values that will be automatically |
683 | overridden. Note: Originally, this ``struct info'' was initialized | |
ce2826aa | 684 | using memset(0). Unfortunately, that ran into problems, namely |
fb6ecb0f AC |
685 | BFD_ENDIAN_BIG is zero. An explicit initialization function that |
686 | can explicitly set each field to a well defined value is used. */ | |
687 | ||
688 | void | |
689 | gdbarch_info_init (struct gdbarch_info *info) | |
690 | { | |
691 | memset (info, 0, sizeof (struct gdbarch_info)); | |
428721aa | 692 | info->byte_order = BFD_ENDIAN_UNKNOWN; |
9d4fde75 | 693 | info->byte_order_for_code = info->byte_order; |
4be87837 | 694 | info->osabi = GDB_OSABI_UNINITIALIZED; |
fb6ecb0f AC |
695 | } |
696 | ||
100bcc3f | 697 | /* Similar to init, but this time fill in the blanks. Information is |
7a107747 DJ |
698 | obtained from the global "set ..." options and explicitly |
699 | initialized INFO fields. */ | |
bf922ad9 AC |
700 | |
701 | void | |
7a107747 | 702 | gdbarch_info_fill (struct gdbarch_info *info) |
bf922ad9 AC |
703 | { |
704 | /* "(gdb) set architecture ...". */ | |
705 | if (info->bfd_arch_info == NULL | |
7a107747 DJ |
706 | && target_architecture_user) |
707 | info->bfd_arch_info = target_architecture_user; | |
424163ea | 708 | /* From the file. */ |
bf922ad9 AC |
709 | if (info->bfd_arch_info == NULL |
710 | && info->abfd != NULL | |
711 | && bfd_get_arch (info->abfd) != bfd_arch_unknown | |
712 | && bfd_get_arch (info->abfd) != bfd_arch_obscure) | |
713 | info->bfd_arch_info = bfd_get_arch_info (info->abfd); | |
23181151 DJ |
714 | /* From the target. */ |
715 | if (info->target_desc != NULL) | |
716 | info->bfd_arch_info = choose_architecture_for_target | |
e35359c5 | 717 | (info->target_desc, info->bfd_arch_info); |
7a107747 DJ |
718 | /* From the default. */ |
719 | if (info->bfd_arch_info == NULL) | |
720 | info->bfd_arch_info = default_bfd_arch; | |
bf922ad9 AC |
721 | |
722 | /* "(gdb) set byte-order ...". */ | |
723 | if (info->byte_order == BFD_ENDIAN_UNKNOWN | |
7a107747 DJ |
724 | && target_byte_order_user != BFD_ENDIAN_UNKNOWN) |
725 | info->byte_order = target_byte_order_user; | |
bf922ad9 AC |
726 | /* From the INFO struct. */ |
727 | if (info->byte_order == BFD_ENDIAN_UNKNOWN | |
728 | && info->abfd != NULL) | |
729 | info->byte_order = (bfd_big_endian (info->abfd) ? BFD_ENDIAN_BIG | |
7a107747 DJ |
730 | : bfd_little_endian (info->abfd) ? BFD_ENDIAN_LITTLE |
731 | : BFD_ENDIAN_UNKNOWN); | |
732 | /* From the default. */ | |
733 | if (info->byte_order == BFD_ENDIAN_UNKNOWN) | |
734 | info->byte_order = default_byte_order; | |
9d4fde75 | 735 | info->byte_order_for_code = info->byte_order; |
bf922ad9 AC |
736 | |
737 | /* "(gdb) set osabi ...". Handled by gdbarch_lookup_osabi. */ | |
08d16641 | 738 | /* From the manual override, or from file. */ |
bf922ad9 AC |
739 | if (info->osabi == GDB_OSABI_UNINITIALIZED) |
740 | info->osabi = gdbarch_lookup_osabi (info->abfd); | |
08d16641 PA |
741 | /* From the target. */ |
742 | if (info->osabi == GDB_OSABI_UNKNOWN && info->target_desc != NULL) | |
743 | info->osabi = tdesc_osabi (info->target_desc); | |
744 | /* From the configured default. */ | |
f4290e2a | 745 | #ifdef GDB_OSABI_DEFAULT |
08d16641 PA |
746 | if (info->osabi == GDB_OSABI_UNKNOWN) |
747 | info->osabi = GDB_OSABI_DEFAULT; | |
f4290e2a | 748 | #endif |
bf922ad9 AC |
749 | |
750 | /* Must have at least filled in the architecture. */ | |
751 | gdb_assert (info->bfd_arch_info != NULL); | |
752 | } | |
753 | ||
0e2de366 MS |
754 | /* Return "current" architecture. If the target is running, this is |
755 | the architecture of the selected frame. Otherwise, the "current" | |
756 | architecture defaults to the target architecture. | |
e17c207e | 757 | |
0e2de366 MS |
758 | This function should normally be called solely by the command |
759 | interpreter routines to determine the architecture to execute a | |
760 | command in. */ | |
e17c207e UW |
761 | struct gdbarch * |
762 | get_current_arch (void) | |
763 | { | |
764 | if (has_stack_frames ()) | |
765 | return get_frame_arch (get_selected_frame (NULL)); | |
766 | else | |
f5656ead | 767 | return target_gdbarch (); |
e17c207e UW |
768 | } |
769 | ||
6c95b8df PA |
770 | int |
771 | default_has_shared_address_space (struct gdbarch *gdbarch) | |
772 | { | |
773 | /* Simply say no. In most unix-like targets each inferior/process | |
774 | has its own address space. */ | |
775 | return 0; | |
776 | } | |
777 | ||
7a697b8d SS |
778 | int |
779 | default_fast_tracepoint_valid_at (struct gdbarch *gdbarch, | |
780 | CORE_ADDR addr, int *isize, char **msg) | |
781 | { | |
782 | /* We don't know if maybe the target has some way to do fast | |
783 | tracepoints that doesn't need gdbarch, so always say yes. */ | |
784 | if (msg) | |
785 | *msg = NULL; | |
786 | return 1; | |
787 | } | |
788 | ||
a1dcb23a DJ |
789 | void |
790 | default_remote_breakpoint_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr, | |
791 | int *kindptr) | |
792 | { | |
793 | gdbarch_breakpoint_from_pc (gdbarch, pcptr, kindptr); | |
794 | } | |
795 | ||
6710bf39 SS |
796 | void |
797 | default_gen_return_address (struct gdbarch *gdbarch, | |
798 | struct agent_expr *ax, struct axs_value *value, | |
799 | CORE_ADDR scope) | |
800 | { | |
801 | error (_("This architecture has no method to collect a return address.")); | |
802 | } | |
803 | ||
18648a37 YQ |
804 | int |
805 | default_return_in_first_hidden_param_p (struct gdbarch *gdbarch, | |
806 | struct type *type) | |
807 | { | |
808 | /* Usually, the return value's address is stored the in the "first hidden" | |
809 | parameter if the return value should be passed by reference, as | |
810 | specified in ABI. */ | |
811 | return language_pass_by_reference (type); | |
812 | } | |
813 | ||
c2170eef MM |
814 | int default_insn_is_call (struct gdbarch *gdbarch, CORE_ADDR addr) |
815 | { | |
816 | return 0; | |
817 | } | |
818 | ||
819 | int default_insn_is_ret (struct gdbarch *gdbarch, CORE_ADDR addr) | |
820 | { | |
821 | return 0; | |
822 | } | |
823 | ||
824 | int default_insn_is_jump (struct gdbarch *gdbarch, CORE_ADDR addr) | |
825 | { | |
826 | return 0; | |
827 | } | |
828 | ||
c0e8c252 AC |
829 | /* */ |
830 | ||
3e43a32a MS |
831 | /* -Wmissing-prototypes */ |
832 | extern initialize_file_ftype _initialize_gdbarch_utils; | |
c0e8c252 AC |
833 | |
834 | void | |
b4a20239 | 835 | _initialize_gdbarch_utils (void) |
c0e8c252 | 836 | { |
7ab04401 | 837 | add_setshow_enum_cmd ("endian", class_support, |
3e43a32a MS |
838 | endian_enum, &set_endian_string, |
839 | _("Set endianness of target."), | |
840 | _("Show endianness of target."), | |
841 | NULL, set_endian, show_endian, | |
7ab04401 | 842 | &setlist, &showlist); |
c0e8c252 | 843 | } |