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c0e8c252 | 1 | /* Dynamic architecture support for GDB, the GNU debugger. |
f4f9705a | 2 | |
213516ef | 3 | Copyright (C) 1998-2023 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" |
c0e8c252 | 23 | #include "gdbcmd.h" |
ef0f16cc | 24 | #include "inferior.h" |
45741a9c | 25 | #include "infrun.h" |
fbec36e2 | 26 | #include "regcache.h" |
4182591f | 27 | #include "sim-regno.h" |
4de283e4 TT |
28 | #include "gdbcore.h" |
29 | #include "osabi.h" | |
d55e5aa6 | 30 | #include "target-descriptions.h" |
4de283e4 TT |
31 | #include "objfiles.h" |
32 | #include "language.h" | |
33 | #include "symtab.h" | |
74fcd19c TT |
34 | #include "dummy-frame.h" |
35 | #include "frame-unwind.h" | |
36 | #include "reggroups.h" | |
37 | #include "auxv.h" | |
38 | #include "observable.h" | |
9e468e95 | 39 | #include "solib-target.h" |
4de283e4 | 40 | |
268a13a5 | 41 | #include "gdbsupport/version.h" |
4de283e4 TT |
42 | |
43 | #include "floatformat.h" | |
44 | ||
45 | #include "dis-asm.h" | |
1fd35568 | 46 | |
07fbbd01 | 47 | bool |
40a53766 | 48 | default_displaced_step_hw_singlestep (struct gdbarch *gdbarch) |
99e40580 UW |
49 | { |
50 | return !gdbarch_software_single_step_p (gdbarch); | |
51 | } | |
237fc4c9 PA |
52 | |
53 | CORE_ADDR | |
54 | displaced_step_at_entry_point (struct gdbarch *gdbarch) | |
55 | { | |
56 | CORE_ADDR addr; | |
57 | int bp_len; | |
58 | ||
59 | addr = entry_point_address (); | |
60 | ||
237fc4c9 PA |
61 | /* Inferior calls also use the entry point as a breakpoint location. |
62 | We don't want displaced stepping to interfere with those | |
63 | breakpoints, so leave space. */ | |
64 | gdbarch_breakpoint_from_pc (gdbarch, &addr, &bp_len); | |
5931a2fa | 65 | addr += bp_len * 2; |
237fc4c9 PA |
66 | |
67 | return addr; | |
68 | } | |
69 | ||
4182591f | 70 | int |
e7faf938 | 71 | legacy_register_sim_regno (struct gdbarch *gdbarch, int regnum) |
4182591f AC |
72 | { |
73 | /* Only makes sense to supply raw registers. */ | |
e7faf938 | 74 | gdb_assert (regnum >= 0 && regnum < gdbarch_num_regs (gdbarch)); |
4182591f AC |
75 | /* NOTE: cagney/2002-05-13: The old code did it this way and it is |
76 | suspected that some GDB/SIM combinations may rely on this | |
85102364 | 77 | behaviour. The default should be one2one_register_sim_regno |
4182591f | 78 | (below). */ |
637b2f86 | 79 | if (gdbarch_register_name (gdbarch, regnum)[0] != '\0') |
4182591f AC |
80 | return regnum; |
81 | else | |
82 | return LEGACY_SIM_REGNO_IGNORE; | |
83 | } | |
84 | ||
d88cb738 LM |
85 | /* See arch-utils.h */ |
86 | ||
87 | CORE_ADDR | |
88 | default_remove_non_address_bits (struct gdbarch *gdbarch, CORE_ADDR pointer) | |
89 | { | |
90 | /* By default, just return the pointer value. */ | |
91 | return pointer; | |
92 | } | |
c193949e LM |
93 | |
94 | /* See arch-utils.h */ | |
95 | ||
96 | std::string | |
97 | default_memtag_to_string (struct gdbarch *gdbarch, struct value *tag) | |
98 | { | |
99 | error (_("This architecture has no method to convert a memory tag to" | |
100 | " a string.")); | |
101 | } | |
102 | ||
103 | /* See arch-utils.h */ | |
104 | ||
105 | bool | |
106 | default_tagged_address_p (struct gdbarch *gdbarch, struct value *address) | |
107 | { | |
108 | /* By default, assume the address is untagged. */ | |
109 | return false; | |
110 | } | |
111 | ||
112 | /* See arch-utils.h */ | |
113 | ||
114 | bool | |
115 | default_memtag_matches_p (struct gdbarch *gdbarch, struct value *address) | |
116 | { | |
117 | /* By default, assume the tags match. */ | |
118 | return true; | |
119 | } | |
120 | ||
121 | /* See arch-utils.h */ | |
122 | ||
123 | bool | |
124 | default_set_memtags (struct gdbarch *gdbarch, struct value *address, | |
125 | size_t length, const gdb::byte_vector &tags, | |
126 | memtag_type tag_type) | |
127 | { | |
128 | /* By default, return true (successful); */ | |
129 | return true; | |
130 | } | |
131 | ||
132 | /* See arch-utils.h */ | |
133 | ||
134 | struct value * | |
135 | default_get_memtag (struct gdbarch *gdbarch, struct value *address, | |
136 | memtag_type tag_type) | |
137 | { | |
138 | /* By default, return no tag. */ | |
139 | return nullptr; | |
140 | } | |
141 | ||
bdcd319a | 142 | CORE_ADDR |
bd2b40ac | 143 | generic_skip_trampoline_code (frame_info_ptr frame, CORE_ADDR pc) |
bdcd319a CV |
144 | { |
145 | return 0; | |
146 | } | |
147 | ||
dea0c52f | 148 | CORE_ADDR |
4c8c40e6 | 149 | generic_skip_solib_resolver (struct gdbarch *gdbarch, CORE_ADDR pc) |
dea0c52f MK |
150 | { |
151 | return 0; | |
152 | } | |
153 | ||
d50355b6 | 154 | int |
e17a4113 | 155 | generic_in_solib_return_trampoline (struct gdbarch *gdbarch, |
2c02bd72 | 156 | CORE_ADDR pc, const char *name) |
d50355b6 MS |
157 | { |
158 | return 0; | |
159 | } | |
160 | ||
c12260ac | 161 | int |
c9cf6e20 | 162 | generic_stack_frame_destroyed_p (struct gdbarch *gdbarch, CORE_ADDR pc) |
c12260ac CV |
163 | { |
164 | return 0; | |
165 | } | |
166 | ||
7eb89530 YQ |
167 | int |
168 | default_code_of_frame_writable (struct gdbarch *gdbarch, | |
bd2b40ac | 169 | frame_info_ptr frame) |
7eb89530 YQ |
170 | { |
171 | return 1; | |
172 | } | |
173 | ||
4d1e7dd1 | 174 | /* Helper functions for gdbarch_inner_than */ |
3339cf8b AC |
175 | |
176 | int | |
fba45db2 | 177 | core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs) |
3339cf8b AC |
178 | { |
179 | return (lhs < rhs); | |
180 | } | |
181 | ||
182 | int | |
fba45db2 | 183 | core_addr_greaterthan (CORE_ADDR lhs, CORE_ADDR rhs) |
3339cf8b AC |
184 | { |
185 | return (lhs > rhs); | |
186 | } | |
187 | ||
0e2de366 | 188 | /* Misc helper functions for targets. */ |
193e3b1a | 189 | |
f517ea4e | 190 | CORE_ADDR |
24568a2c | 191 | core_addr_identity (struct gdbarch *gdbarch, CORE_ADDR addr) |
f517ea4e PS |
192 | { |
193 | return addr; | |
194 | } | |
195 | ||
e2d0e7eb AC |
196 | CORE_ADDR |
197 | convert_from_func_ptr_addr_identity (struct gdbarch *gdbarch, CORE_ADDR addr, | |
198 | struct target_ops *targ) | |
199 | { | |
200 | return addr; | |
201 | } | |
202 | ||
88c72b7d | 203 | int |
d3f73121 | 204 | no_op_reg_to_regnum (struct gdbarch *gdbarch, int reg) |
88c72b7d AC |
205 | { |
206 | return reg; | |
207 | } | |
208 | ||
a2cf933a | 209 | void |
3e29f34a | 210 | default_coff_make_msymbol_special (int val, struct minimal_symbol *msym) |
a2cf933a EZ |
211 | { |
212 | return; | |
213 | } | |
214 | ||
3e29f34a MR |
215 | /* See arch-utils.h. */ |
216 | ||
a2cf933a | 217 | void |
3e29f34a | 218 | default_make_symbol_special (struct symbol *sym, struct objfile *objfile) |
a2cf933a EZ |
219 | { |
220 | return; | |
221 | } | |
222 | ||
3e29f34a MR |
223 | /* See arch-utils.h. */ |
224 | ||
225 | CORE_ADDR | |
226 | default_adjust_dwarf2_addr (CORE_ADDR pc) | |
227 | { | |
228 | return pc; | |
229 | } | |
230 | ||
231 | /* See arch-utils.h. */ | |
232 | ||
233 | CORE_ADDR | |
234 | default_adjust_dwarf2_line (CORE_ADDR addr, int rel) | |
235 | { | |
236 | return addr; | |
237 | } | |
238 | ||
b41c5a85 JW |
239 | /* See arch-utils.h. */ |
240 | ||
241 | bool | |
242 | default_execute_dwarf_cfa_vendor_op (struct gdbarch *gdbarch, gdb_byte op, | |
243 | struct dwarf2_frame_state *fs) | |
244 | { | |
245 | return false; | |
246 | } | |
247 | ||
01fb7433 | 248 | int |
64a3914f | 249 | cannot_register_not (struct gdbarch *gdbarch, int regnum) |
01fb7433 AC |
250 | { |
251 | return 0; | |
252 | } | |
39d4ef09 AC |
253 | |
254 | /* Legacy version of target_virtual_frame_pointer(). Assumes that | |
0e2de366 MS |
255 | there is an gdbarch_deprecated_fp_regnum and that it is the same, |
256 | cooked or raw. */ | |
39d4ef09 AC |
257 | |
258 | void | |
a54fba4c MD |
259 | legacy_virtual_frame_pointer (struct gdbarch *gdbarch, |
260 | CORE_ADDR pc, | |
39d4ef09 AC |
261 | int *frame_regnum, |
262 | LONGEST *frame_offset) | |
263 | { | |
20bcf01c AC |
264 | /* FIXME: cagney/2002-09-13: This code is used when identifying the |
265 | frame pointer of the current PC. It is assuming that a single | |
266 | register and an offset can determine this. I think it should | |
267 | instead generate a byte code expression as that would work better | |
268 | with things like Dwarf2's CFI. */ | |
a54fba4c MD |
269 | if (gdbarch_deprecated_fp_regnum (gdbarch) >= 0 |
270 | && gdbarch_deprecated_fp_regnum (gdbarch) | |
271 | < gdbarch_num_regs (gdbarch)) | |
272 | *frame_regnum = gdbarch_deprecated_fp_regnum (gdbarch); | |
273 | else if (gdbarch_sp_regnum (gdbarch) >= 0 | |
274 | && gdbarch_sp_regnum (gdbarch) | |
dda83cd7 | 275 | < gdbarch_num_regs (gdbarch)) |
a54fba4c | 276 | *frame_regnum = gdbarch_sp_regnum (gdbarch); |
20bcf01c AC |
277 | else |
278 | /* Should this be an internal error? I guess so, it is reflecting | |
279 | an architectural limitation in the current design. */ | |
f34652de | 280 | internal_error (_("No virtual frame pointer available")); |
39d4ef09 AC |
281 | *frame_offset = 0; |
282 | } | |
46cd78fb | 283 | |
9b790ce7 UW |
284 | /* Return a floating-point format for a floating-point variable of |
285 | length LEN in bits. If non-NULL, NAME is the name of its type. | |
286 | If no suitable type is found, return NULL. */ | |
287 | ||
288 | const struct floatformat ** | |
289 | default_floatformat_for_type (struct gdbarch *gdbarch, | |
290 | const char *name, int len) | |
291 | { | |
292 | const struct floatformat **format = NULL; | |
293 | ||
1b6b755e LM |
294 | /* Check if this is a bfloat16 type. It has the same size as the |
295 | IEEE half float type, so we use the base type name to tell them | |
296 | apart. */ | |
297 | if (name != nullptr && strcmp (name, "__bf16") == 0 | |
298 | && len == gdbarch_bfloat16_bit (gdbarch)) | |
299 | format = gdbarch_bfloat16_format (gdbarch); | |
300 | else if (len == gdbarch_half_bit (gdbarch)) | |
9b790ce7 UW |
301 | format = gdbarch_half_format (gdbarch); |
302 | else if (len == gdbarch_float_bit (gdbarch)) | |
303 | format = gdbarch_float_format (gdbarch); | |
304 | else if (len == gdbarch_double_bit (gdbarch)) | |
305 | format = gdbarch_double_format (gdbarch); | |
306 | else if (len == gdbarch_long_double_bit (gdbarch)) | |
307 | format = gdbarch_long_double_format (gdbarch); | |
308 | /* On i386 the 'long double' type takes 96 bits, | |
309 | while the real number of used bits is only 80, | |
310 | both in processor and in memory. | |
311 | The code below accepts the real bit size. */ | |
312 | else if (gdbarch_long_double_format (gdbarch) != NULL | |
313 | && len == gdbarch_long_double_format (gdbarch)[0]->totalsize) | |
314 | format = gdbarch_long_double_format (gdbarch); | |
315 | ||
316 | return format; | |
317 | } | |
d7bd68ca | 318 | \f |
13d01224 | 319 | int |
76a8ddb9 UW |
320 | generic_convert_register_p (struct gdbarch *gdbarch, int regnum, |
321 | struct type *type) | |
13d01224 | 322 | { |
9730f241 | 323 | return 0; |
13d01224 AC |
324 | } |
325 | ||
192cb3d4 MK |
326 | int |
327 | default_stabs_argument_has_addr (struct gdbarch *gdbarch, struct type *type) | |
328 | { | |
192cb3d4 MK |
329 | return 0; |
330 | } | |
331 | ||
3ca64954 RC |
332 | int |
333 | generic_instruction_nullified (struct gdbarch *gdbarch, | |
334 | struct regcache *regcache) | |
335 | { | |
336 | return 0; | |
337 | } | |
338 | ||
123dc839 DJ |
339 | int |
340 | default_remote_register_number (struct gdbarch *gdbarch, | |
341 | int regno) | |
342 | { | |
343 | return regno; | |
344 | } | |
345 | ||
3437254d PA |
346 | /* See arch-utils.h. */ |
347 | ||
348 | int | |
349 | default_vsyscall_range (struct gdbarch *gdbarch, struct mem_range *range) | |
350 | { | |
351 | return 0; | |
352 | } | |
353 | ||
01fb7433 | 354 | \f |
b4a20239 AC |
355 | /* Functions to manipulate the endianness of the target. */ |
356 | ||
f486487f | 357 | static enum bfd_endian target_byte_order_user = BFD_ENDIAN_UNKNOWN; |
b4a20239 | 358 | |
53904c9e AC |
359 | static const char endian_big[] = "big"; |
360 | static const char endian_little[] = "little"; | |
361 | static const char endian_auto[] = "auto"; | |
40478521 | 362 | static const char *const endian_enum[] = |
b4a20239 AC |
363 | { |
364 | endian_big, | |
365 | endian_little, | |
366 | endian_auto, | |
367 | NULL, | |
368 | }; | |
dedb7102 | 369 | static const char *set_endian_string = endian_auto; |
b4a20239 | 370 | |
b6d373df DJ |
371 | enum bfd_endian |
372 | selected_byte_order (void) | |
373 | { | |
e17c207e | 374 | return target_byte_order_user; |
b6d373df DJ |
375 | } |
376 | ||
b4a20239 AC |
377 | /* Called by ``show endian''. */ |
378 | ||
379 | static void | |
7ab04401 AC |
380 | show_endian (struct ui_file *file, int from_tty, struct cmd_list_element *c, |
381 | const char *value) | |
b4a20239 | 382 | { |
7b6b9e83 | 383 | if (target_byte_order_user == BFD_ENDIAN_UNKNOWN) |
e17c207e | 384 | if (gdbarch_byte_order (get_current_arch ()) == BFD_ENDIAN_BIG) |
6cb06a8c TT |
385 | gdb_printf (file, _("The target endianness is set automatically " |
386 | "(currently big endian).\n")); | |
edefbb7c | 387 | else |
6cb06a8c TT |
388 | gdb_printf (file, _("The target endianness is set automatically " |
389 | "(currently little endian).\n")); | |
b4a20239 | 390 | else |
e17c207e | 391 | if (target_byte_order_user == BFD_ENDIAN_BIG) |
6cb06a8c TT |
392 | gdb_printf (file, |
393 | _("The target is set to big endian.\n")); | |
7ab04401 | 394 | else |
6cb06a8c TT |
395 | gdb_printf (file, |
396 | _("The target is set to little endian.\n")); | |
b4a20239 AC |
397 | } |
398 | ||
399 | static void | |
eb4c3f4a | 400 | set_endian (const char *ignore_args, int from_tty, struct cmd_list_element *c) |
b4a20239 | 401 | { |
7a107747 DJ |
402 | struct gdbarch_info info; |
403 | ||
3fd3d7d2 | 404 | if (set_endian_string == endian_auto) |
b4a20239 | 405 | { |
7a107747 DJ |
406 | target_byte_order_user = BFD_ENDIAN_UNKNOWN; |
407 | if (! gdbarch_update_p (info)) | |
f34652de | 408 | internal_error (_("set_endian: architecture update failed")); |
b4a20239 AC |
409 | } |
410 | else if (set_endian_string == endian_little) | |
411 | { | |
d90cf509 AC |
412 | info.byte_order = BFD_ENDIAN_LITTLE; |
413 | if (! gdbarch_update_p (info)) | |
6cb06a8c TT |
414 | gdb_printf (gdb_stderr, |
415 | _("Little endian target not supported by GDB\n")); | |
7a107747 DJ |
416 | else |
417 | target_byte_order_user = BFD_ENDIAN_LITTLE; | |
b4a20239 AC |
418 | } |
419 | else if (set_endian_string == endian_big) | |
420 | { | |
d90cf509 AC |
421 | info.byte_order = BFD_ENDIAN_BIG; |
422 | if (! gdbarch_update_p (info)) | |
6cb06a8c TT |
423 | gdb_printf (gdb_stderr, |
424 | _("Big endian target not supported by GDB\n")); | |
7a107747 DJ |
425 | else |
426 | target_byte_order_user = BFD_ENDIAN_BIG; | |
b4a20239 AC |
427 | } |
428 | else | |
f34652de | 429 | internal_error (_("set_endian: bad value")); |
7a107747 | 430 | |
7ab04401 | 431 | show_endian (gdb_stdout, from_tty, NULL, NULL); |
b4a20239 AC |
432 | } |
433 | ||
23181151 | 434 | /* Given SELECTED, a currently selected BFD architecture, and |
e35359c5 UW |
435 | TARGET_DESC, the current target description, return what |
436 | architecture to use. | |
437 | ||
438 | SELECTED may be NULL, in which case we return the architecture | |
439 | associated with TARGET_DESC. If SELECTED specifies a variant | |
85102364 | 440 | of the architecture associated with TARGET_DESC, return the |
e35359c5 UW |
441 | more specific of the two. |
442 | ||
443 | If SELECTED is a different architecture, but it is accepted as | |
444 | compatible by the target, we can use the target architecture. | |
445 | ||
446 | If SELECTED is obviously incompatible, warn the user. */ | |
23181151 DJ |
447 | |
448 | static const struct bfd_arch_info * | |
e35359c5 UW |
449 | choose_architecture_for_target (const struct target_desc *target_desc, |
450 | const struct bfd_arch_info *selected) | |
23181151 | 451 | { |
e35359c5 | 452 | const struct bfd_arch_info *from_target = tdesc_architecture (target_desc); |
23181151 DJ |
453 | const struct bfd_arch_info *compat1, *compat2; |
454 | ||
455 | if (selected == NULL) | |
456 | return from_target; | |
457 | ||
458 | if (from_target == NULL) | |
459 | return selected; | |
460 | ||
461 | /* struct bfd_arch_info objects are singletons: that is, there's | |
462 | supposed to be exactly one instance for a given machine. So you | |
463 | can tell whether two are equivalent by comparing pointers. */ | |
464 | if (from_target == selected) | |
465 | return selected; | |
466 | ||
467 | /* BFD's 'A->compatible (A, B)' functions return zero if A and B are | |
468 | incompatible. But if they are compatible, it returns the 'more | |
469 | featureful' of the two arches. That is, if A can run code | |
470 | written for B, but B can't run code written for A, then it'll | |
471 | return A. | |
472 | ||
473 | Some targets (e.g. MIPS as of 2006-12-04) don't fully | |
474 | implement this, instead always returning NULL or the first | |
475 | argument. We detect that case by checking both directions. */ | |
476 | ||
477 | compat1 = selected->compatible (selected, from_target); | |
478 | compat2 = from_target->compatible (from_target, selected); | |
479 | ||
480 | if (compat1 == NULL && compat2 == NULL) | |
481 | { | |
0e2de366 MS |
482 | /* BFD considers the architectures incompatible. Check our |
483 | target description whether it accepts SELECTED as compatible | |
484 | anyway. */ | |
e35359c5 UW |
485 | if (tdesc_compatible_p (target_desc, selected)) |
486 | return from_target; | |
487 | ||
23181151 DJ |
488 | warning (_("Selected architecture %s is not compatible " |
489 | "with reported target architecture %s"), | |
490 | selected->printable_name, from_target->printable_name); | |
491 | return selected; | |
492 | } | |
493 | ||
494 | if (compat1 == NULL) | |
495 | return compat2; | |
496 | if (compat2 == NULL) | |
497 | return compat1; | |
498 | if (compat1 == compat2) | |
499 | return compat1; | |
500 | ||
0e2de366 MS |
501 | /* If the two didn't match, but one of them was a default |
502 | architecture, assume the more specific one is correct. This | |
503 | handles the case where an executable or target description just | |
504 | says "mips", but the other knows which MIPS variant. */ | |
23181151 DJ |
505 | if (compat1->the_default) |
506 | return compat2; | |
507 | if (compat2->the_default) | |
508 | return compat1; | |
509 | ||
510 | /* We have no idea which one is better. This is a bug, but not | |
511 | a critical problem; warn the user. */ | |
512 | warning (_("Selected architecture %s is ambiguous with " | |
513 | "reported target architecture %s"), | |
514 | selected->printable_name, from_target->printable_name); | |
515 | return selected; | |
516 | } | |
517 | ||
0e2de366 | 518 | /* Functions to manipulate the architecture of the target. */ |
b4a20239 AC |
519 | |
520 | enum set_arch { set_arch_auto, set_arch_manual }; | |
521 | ||
7a107747 | 522 | static const struct bfd_arch_info *target_architecture_user; |
b4a20239 | 523 | |
a8cf2722 AC |
524 | static const char *set_architecture_string; |
525 | ||
526 | const char * | |
527 | selected_architecture_name (void) | |
528 | { | |
7a107747 | 529 | if (target_architecture_user == NULL) |
a8cf2722 AC |
530 | return NULL; |
531 | else | |
532 | return set_architecture_string; | |
533 | } | |
b4a20239 | 534 | |
b4a20239 | 535 | /* Called if the user enters ``show architecture'' without an |
0e2de366 | 536 | argument. */ |
b4a20239 AC |
537 | |
538 | static void | |
7ab04401 AC |
539 | show_architecture (struct ui_file *file, int from_tty, |
540 | struct cmd_list_element *c, const char *value) | |
b4a20239 | 541 | { |
7a107747 | 542 | if (target_architecture_user == NULL) |
6cb06a8c TT |
543 | gdb_printf (file, _("The target architecture is set to " |
544 | "\"auto\" (currently \"%s\").\n"), | |
545 | gdbarch_bfd_arch_info (get_current_arch ())->printable_name); | |
b4a20239 | 546 | else |
6cb06a8c TT |
547 | gdb_printf (file, _("The target architecture is set to \"%s\".\n"), |
548 | set_architecture_string); | |
b4a20239 AC |
549 | } |
550 | ||
551 | ||
552 | /* Called if the user enters ``set architecture'' with or without an | |
0e2de366 | 553 | argument. */ |
b4a20239 AC |
554 | |
555 | static void | |
eb4c3f4a TT |
556 | set_architecture (const char *ignore_args, |
557 | int from_tty, struct cmd_list_element *c) | |
b4a20239 | 558 | { |
7a107747 DJ |
559 | struct gdbarch_info info; |
560 | ||
b4a20239 AC |
561 | if (strcmp (set_architecture_string, "auto") == 0) |
562 | { | |
7a107747 DJ |
563 | target_architecture_user = NULL; |
564 | if (!gdbarch_update_p (info)) | |
f34652de | 565 | internal_error (_("could not select an architecture automatically")); |
b4a20239 | 566 | } |
d90cf509 | 567 | else |
b4a20239 | 568 | { |
b4a20239 AC |
569 | info.bfd_arch_info = bfd_scan_arch (set_architecture_string); |
570 | if (info.bfd_arch_info == NULL) | |
f34652de | 571 | internal_error (_("set_architecture: bfd_scan_arch failed")); |
16f33e29 | 572 | if (gdbarch_update_p (info)) |
7a107747 | 573 | target_architecture_user = info.bfd_arch_info; |
b4a20239 | 574 | else |
6cb06a8c TT |
575 | gdb_printf (gdb_stderr, |
576 | _("Architecture `%s' not recognized.\n"), | |
577 | set_architecture_string); | |
b4a20239 | 578 | } |
7ab04401 | 579 | show_architecture (gdb_stdout, from_tty, NULL, NULL); |
b4a20239 AC |
580 | } |
581 | ||
ebdba546 | 582 | /* Try to select a global architecture that matches "info". Return |
0f9741f2 | 583 | non-zero if the attempt succeeds. */ |
ebdba546 AC |
584 | int |
585 | gdbarch_update_p (struct gdbarch_info info) | |
586 | { | |
a7f1256d UW |
587 | struct gdbarch *new_gdbarch; |
588 | ||
589 | /* Check for the current file. */ | |
590 | if (info.abfd == NULL) | |
7e10abd1 | 591 | info.abfd = current_program_space->exec_bfd (); |
a7f1256d UW |
592 | if (info.abfd == NULL) |
593 | info.abfd = core_bfd; | |
594 | ||
595 | /* Check for the current target description. */ | |
596 | if (info.target_desc == NULL) | |
597 | info.target_desc = target_current_description (); | |
598 | ||
599 | new_gdbarch = gdbarch_find_by_info (info); | |
ebdba546 AC |
600 | |
601 | /* If there no architecture by that name, reject the request. */ | |
602 | if (new_gdbarch == NULL) | |
603 | { | |
604 | if (gdbarch_debug) | |
6cb06a8c TT |
605 | gdb_printf (gdb_stdlog, "gdbarch_update_p: " |
606 | "Architecture not found\n"); | |
ebdba546 AC |
607 | return 0; |
608 | } | |
609 | ||
610 | /* If it is the same old architecture, accept the request (but don't | |
611 | swap anything). */ | |
f5656ead | 612 | if (new_gdbarch == target_gdbarch ()) |
ebdba546 AC |
613 | { |
614 | if (gdbarch_debug) | |
6cb06a8c TT |
615 | gdb_printf (gdb_stdlog, "gdbarch_update_p: " |
616 | "Architecture %s (%s) unchanged\n", | |
617 | host_address_to_string (new_gdbarch), | |
618 | gdbarch_bfd_arch_info (new_gdbarch)->printable_name); | |
ebdba546 AC |
619 | return 1; |
620 | } | |
621 | ||
622 | /* It's a new architecture, swap it in. */ | |
623 | if (gdbarch_debug) | |
6cb06a8c TT |
624 | gdb_printf (gdb_stdlog, "gdbarch_update_p: " |
625 | "New architecture %s (%s) selected\n", | |
626 | host_address_to_string (new_gdbarch), | |
627 | gdbarch_bfd_arch_info (new_gdbarch)->printable_name); | |
72c4529c SM |
628 | |
629 | current_inferior ()->set_arch (new_gdbarch); | |
ebdba546 AC |
630 | |
631 | return 1; | |
632 | } | |
633 | ||
2b026650 MK |
634 | /* Return the architecture for ABFD. If no suitable architecture |
635 | could be find, return NULL. */ | |
636 | ||
637 | struct gdbarch * | |
638 | gdbarch_from_bfd (bfd *abfd) | |
b4a20239 | 639 | { |
d90cf509 | 640 | struct gdbarch_info info; |
05c547f6 | 641 | |
d90cf509 | 642 | info.abfd = abfd; |
b60eb90d | 643 | return gdbarch_find_by_info (info); |
2b026650 MK |
644 | } |
645 | ||
646 | /* Set the dynamic target-system-dependent parameters (architecture, | |
647 | byte-order) using information found in the BFD */ | |
648 | ||
649 | void | |
650 | set_gdbarch_from_file (bfd *abfd) | |
651 | { | |
a7f1256d | 652 | struct gdbarch_info info; |
2b026650 MK |
653 | struct gdbarch *gdbarch; |
654 | ||
a7f1256d UW |
655 | info.abfd = abfd; |
656 | info.target_desc = target_current_description (); | |
657 | gdbarch = gdbarch_find_by_info (info); | |
658 | ||
2b026650 | 659 | if (gdbarch == NULL) |
8a3fe4f8 | 660 | error (_("Architecture of file not recognized.")); |
72c4529c SM |
661 | |
662 | current_inferior ()->set_arch (gdbarch); | |
b4a20239 AC |
663 | } |
664 | ||
665 | /* Initialize the current architecture. Update the ``set | |
666 | architecture'' command so that it specifies a list of valid | |
667 | architectures. */ | |
668 | ||
1ba607ad AC |
669 | #ifdef DEFAULT_BFD_ARCH |
670 | extern const bfd_arch_info_type DEFAULT_BFD_ARCH; | |
671 | static const bfd_arch_info_type *default_bfd_arch = &DEFAULT_BFD_ARCH; | |
672 | #else | |
4b9b3959 | 673 | static const bfd_arch_info_type *default_bfd_arch; |
1ba607ad AC |
674 | #endif |
675 | ||
676 | #ifdef DEFAULT_BFD_VEC | |
677 | extern const bfd_target DEFAULT_BFD_VEC; | |
678 | static const bfd_target *default_bfd_vec = &DEFAULT_BFD_VEC; | |
679 | #else | |
680 | static const bfd_target *default_bfd_vec; | |
681 | #endif | |
682 | ||
f486487f | 683 | static enum bfd_endian default_byte_order = BFD_ENDIAN_UNKNOWN; |
7a107747 | 684 | |
9b1f59fc SM |
685 | /* Printable names of architectures. Used as the enum list of the |
686 | "set arch" command. */ | |
687 | static std::vector<const char *> arches; | |
688 | ||
b4a20239 AC |
689 | void |
690 | initialize_current_architecture (void) | |
691 | { | |
9b1f59fc | 692 | arches = gdbarch_printable_names (); |
1ba607ad | 693 | |
0e2de366 | 694 | /* Find a default architecture. */ |
7a107747 | 695 | if (default_bfd_arch == NULL) |
b4a20239 | 696 | { |
1ba607ad | 697 | /* Choose the architecture by taking the first one |
0e2de366 | 698 | alphabetically. */ |
1ba607ad | 699 | const char *chosen = arches[0]; |
9b1f59fc SM |
700 | |
701 | for (const char *arch : arches) | |
b4a20239 | 702 | { |
9b1f59fc SM |
703 | if (strcmp (arch, chosen) < 0) |
704 | chosen = arch; | |
b4a20239 | 705 | } |
9b1f59fc | 706 | |
b4a20239 | 707 | if (chosen == NULL) |
f34652de | 708 | internal_error (_("initialize_current_architecture: No arch")); |
9b1f59fc | 709 | |
7a107747 DJ |
710 | default_bfd_arch = bfd_scan_arch (chosen); |
711 | if (default_bfd_arch == NULL) | |
f34652de | 712 | internal_error (_("initialize_current_architecture: Arch not found")); |
1ba607ad AC |
713 | } |
714 | ||
b447dd03 | 715 | gdbarch_info info; |
7a107747 DJ |
716 | info.bfd_arch_info = default_bfd_arch; |
717 | ||
afe64c1a | 718 | /* Take several guesses at a byte order. */ |
7a107747 | 719 | if (default_byte_order == BFD_ENDIAN_UNKNOWN |
1ba607ad AC |
720 | && default_bfd_vec != NULL) |
721 | { | |
0e2de366 | 722 | /* Extract BFD's default vector's byte order. */ |
1ba607ad AC |
723 | switch (default_bfd_vec->byteorder) |
724 | { | |
725 | case BFD_ENDIAN_BIG: | |
7a107747 | 726 | default_byte_order = BFD_ENDIAN_BIG; |
1ba607ad AC |
727 | break; |
728 | case BFD_ENDIAN_LITTLE: | |
7a107747 | 729 | default_byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad AC |
730 | break; |
731 | default: | |
732 | break; | |
733 | } | |
734 | } | |
7a107747 | 735 | if (default_byte_order == BFD_ENDIAN_UNKNOWN) |
1ba607ad | 736 | { |
0e2de366 | 737 | /* look for ``*el-*'' in the target name. */ |
1ba607ad AC |
738 | const char *chp; |
739 | chp = strchr (target_name, '-'); | |
740 | if (chp != NULL | |
741 | && chp - 2 >= target_name | |
61012eef | 742 | && startswith (chp - 2, "el")) |
7a107747 | 743 | default_byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad | 744 | } |
7a107747 | 745 | if (default_byte_order == BFD_ENDIAN_UNKNOWN) |
1ba607ad AC |
746 | { |
747 | /* Wire it to big-endian!!! */ | |
7a107747 | 748 | default_byte_order = BFD_ENDIAN_BIG; |
1ba607ad AC |
749 | } |
750 | ||
7a107747 | 751 | info.byte_order = default_byte_order; |
9d4fde75 | 752 | info.byte_order_for_code = info.byte_order; |
7a107747 | 753 | |
d90cf509 | 754 | if (! gdbarch_update_p (info)) |
f34652de | 755 | internal_error (_("initialize_current_architecture: Selection of " |
edefbb7c | 756 | "initial architecture failed")); |
b4a20239 | 757 | |
1ba607ad | 758 | /* Create the ``set architecture'' command appending ``auto'' to the |
0e2de366 | 759 | list of architectures. */ |
b4a20239 | 760 | { |
0e2de366 | 761 | /* Append ``auto''. */ |
dedb7102 TT |
762 | set_architecture_string = "auto"; |
763 | arches.push_back (set_architecture_string); | |
9b1f59fc | 764 | arches.push_back (nullptr); |
5e84b7ee SM |
765 | set_show_commands architecture_cmds |
766 | = add_setshow_enum_cmd ("architecture", class_support, | |
9b1f59fc | 767 | arches.data (), &set_architecture_string, |
5e84b7ee SM |
768 | _("Set architecture of target."), |
769 | _("Show architecture of target."), NULL, | |
770 | set_architecture, show_architecture, | |
771 | &setlist, &showlist); | |
772 | add_alias_cmd ("processor", architecture_cmds.set, class_support, 1, | |
773 | &setlist); | |
b4a20239 AC |
774 | } |
775 | } | |
776 | ||
100bcc3f | 777 | /* Similar to init, but this time fill in the blanks. Information is |
7a107747 DJ |
778 | obtained from the global "set ..." options and explicitly |
779 | initialized INFO fields. */ | |
bf922ad9 AC |
780 | |
781 | void | |
7a107747 | 782 | gdbarch_info_fill (struct gdbarch_info *info) |
bf922ad9 AC |
783 | { |
784 | /* "(gdb) set architecture ...". */ | |
785 | if (info->bfd_arch_info == NULL | |
7a107747 DJ |
786 | && target_architecture_user) |
787 | info->bfd_arch_info = target_architecture_user; | |
424163ea | 788 | /* From the file. */ |
bf922ad9 AC |
789 | if (info->bfd_arch_info == NULL |
790 | && info->abfd != NULL | |
791 | && bfd_get_arch (info->abfd) != bfd_arch_unknown | |
792 | && bfd_get_arch (info->abfd) != bfd_arch_obscure) | |
793 | info->bfd_arch_info = bfd_get_arch_info (info->abfd); | |
23181151 DJ |
794 | /* From the target. */ |
795 | if (info->target_desc != NULL) | |
796 | info->bfd_arch_info = choose_architecture_for_target | |
e35359c5 | 797 | (info->target_desc, info->bfd_arch_info); |
7a107747 DJ |
798 | /* From the default. */ |
799 | if (info->bfd_arch_info == NULL) | |
800 | info->bfd_arch_info = default_bfd_arch; | |
bf922ad9 AC |
801 | |
802 | /* "(gdb) set byte-order ...". */ | |
803 | if (info->byte_order == BFD_ENDIAN_UNKNOWN | |
7a107747 DJ |
804 | && target_byte_order_user != BFD_ENDIAN_UNKNOWN) |
805 | info->byte_order = target_byte_order_user; | |
bf922ad9 AC |
806 | /* From the INFO struct. */ |
807 | if (info->byte_order == BFD_ENDIAN_UNKNOWN | |
808 | && info->abfd != NULL) | |
809 | info->byte_order = (bfd_big_endian (info->abfd) ? BFD_ENDIAN_BIG | |
7a107747 DJ |
810 | : bfd_little_endian (info->abfd) ? BFD_ENDIAN_LITTLE |
811 | : BFD_ENDIAN_UNKNOWN); | |
812 | /* From the default. */ | |
813 | if (info->byte_order == BFD_ENDIAN_UNKNOWN) | |
814 | info->byte_order = default_byte_order; | |
9d4fde75 | 815 | info->byte_order_for_code = info->byte_order; |
4b2dfa9d MR |
816 | /* Wire the default to the last selected byte order. */ |
817 | default_byte_order = info->byte_order; | |
bf922ad9 AC |
818 | |
819 | /* "(gdb) set osabi ...". Handled by gdbarch_lookup_osabi. */ | |
08d16641 | 820 | /* From the manual override, or from file. */ |
26540402 | 821 | if (info->osabi == GDB_OSABI_UNKNOWN) |
bf922ad9 | 822 | info->osabi = gdbarch_lookup_osabi (info->abfd); |
08d16641 | 823 | /* From the target. */ |
26540402 | 824 | |
08d16641 PA |
825 | if (info->osabi == GDB_OSABI_UNKNOWN && info->target_desc != NULL) |
826 | info->osabi = tdesc_osabi (info->target_desc); | |
827 | /* From the configured default. */ | |
f4290e2a | 828 | #ifdef GDB_OSABI_DEFAULT |
08d16641 PA |
829 | if (info->osabi == GDB_OSABI_UNKNOWN) |
830 | info->osabi = GDB_OSABI_DEFAULT; | |
f4290e2a | 831 | #endif |
26540402 SM |
832 | /* If we still don't know which osabi to pick, pick none. */ |
833 | if (info->osabi == GDB_OSABI_UNKNOWN) | |
834 | info->osabi = GDB_OSABI_NONE; | |
bf922ad9 AC |
835 | |
836 | /* Must have at least filled in the architecture. */ | |
837 | gdb_assert (info->bfd_arch_info != NULL); | |
838 | } | |
839 | ||
0e2de366 MS |
840 | /* Return "current" architecture. If the target is running, this is |
841 | the architecture of the selected frame. Otherwise, the "current" | |
842 | architecture defaults to the target architecture. | |
e17c207e | 843 | |
0e2de366 MS |
844 | This function should normally be called solely by the command |
845 | interpreter routines to determine the architecture to execute a | |
846 | command in. */ | |
e17c207e UW |
847 | struct gdbarch * |
848 | get_current_arch (void) | |
849 | { | |
850 | if (has_stack_frames ()) | |
851 | return get_frame_arch (get_selected_frame (NULL)); | |
852 | else | |
f5656ead | 853 | return target_gdbarch (); |
e17c207e UW |
854 | } |
855 | ||
6c95b8df PA |
856 | int |
857 | default_has_shared_address_space (struct gdbarch *gdbarch) | |
858 | { | |
859 | /* Simply say no. In most unix-like targets each inferior/process | |
860 | has its own address space. */ | |
861 | return 0; | |
862 | } | |
863 | ||
7a697b8d | 864 | int |
6b940e6a | 865 | default_fast_tracepoint_valid_at (struct gdbarch *gdbarch, CORE_ADDR addr, |
281d762b | 866 | std::string *msg) |
7a697b8d SS |
867 | { |
868 | /* We don't know if maybe the target has some way to do fast | |
869 | tracepoints that doesn't need gdbarch, so always say yes. */ | |
870 | if (msg) | |
281d762b | 871 | msg->clear (); |
7a697b8d SS |
872 | return 1; |
873 | } | |
874 | ||
22f13eb8 YQ |
875 | const gdb_byte * |
876 | default_breakpoint_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr, | |
877 | int *lenptr) | |
878 | { | |
879 | int kind = gdbarch_breakpoint_kind_from_pc (gdbarch, pcptr); | |
880 | ||
881 | return gdbarch_sw_breakpoint_from_kind (gdbarch, kind, lenptr); | |
882 | } | |
833b7ab5 YQ |
883 | int |
884 | default_breakpoint_kind_from_current_state (struct gdbarch *gdbarch, | |
885 | struct regcache *regcache, | |
886 | CORE_ADDR *pcptr) | |
887 | { | |
888 | return gdbarch_breakpoint_kind_from_pc (gdbarch, pcptr); | |
889 | } | |
890 | ||
22f13eb8 | 891 | |
6710bf39 SS |
892 | void |
893 | default_gen_return_address (struct gdbarch *gdbarch, | |
894 | struct agent_expr *ax, struct axs_value *value, | |
895 | CORE_ADDR scope) | |
896 | { | |
897 | error (_("This architecture has no method to collect a return address.")); | |
898 | } | |
899 | ||
18648a37 YQ |
900 | int |
901 | default_return_in_first_hidden_param_p (struct gdbarch *gdbarch, | |
902 | struct type *type) | |
903 | { | |
904 | /* Usually, the return value's address is stored the in the "first hidden" | |
905 | parameter if the return value should be passed by reference, as | |
906 | specified in ABI. */ | |
9d084466 | 907 | return !(language_pass_by_reference (type).trivially_copyable); |
18648a37 YQ |
908 | } |
909 | ||
c2170eef MM |
910 | int default_insn_is_call (struct gdbarch *gdbarch, CORE_ADDR addr) |
911 | { | |
912 | return 0; | |
913 | } | |
914 | ||
915 | int default_insn_is_ret (struct gdbarch *gdbarch, CORE_ADDR addr) | |
916 | { | |
917 | return 0; | |
918 | } | |
919 | ||
920 | int default_insn_is_jump (struct gdbarch *gdbarch, CORE_ADDR addr) | |
921 | { | |
922 | return 0; | |
923 | } | |
924 | ||
5133a315 LM |
925 | /* See arch-utils.h. */ |
926 | ||
927 | bool | |
928 | default_program_breakpoint_here_p (struct gdbarch *gdbarch, | |
929 | CORE_ADDR address) | |
930 | { | |
931 | int len; | |
932 | const gdb_byte *bpoint = gdbarch_breakpoint_from_pc (gdbarch, &address, &len); | |
933 | ||
934 | /* Software breakpoints unsupported? */ | |
935 | if (bpoint == nullptr) | |
936 | return false; | |
937 | ||
938 | gdb_byte *target_mem = (gdb_byte *) alloca (len); | |
939 | ||
940 | /* Enable the automatic memory restoration from breakpoints while | |
941 | we read the memory. Otherwise we may find temporary breakpoints, ones | |
942 | inserted by GDB, and flag them as permanent breakpoints. */ | |
943 | scoped_restore restore_memory | |
944 | = make_scoped_restore_show_memory_breakpoints (0); | |
945 | ||
946 | if (target_read_memory (address, target_mem, len) == 0) | |
947 | { | |
948 | /* Check if this is a breakpoint instruction for this architecture, | |
949 | including ones used by GDB. */ | |
950 | if (memcmp (target_mem, bpoint, len) == 0) | |
951 | return true; | |
952 | } | |
953 | ||
954 | return false; | |
955 | } | |
956 | ||
ae9bb220 PA |
957 | void |
958 | default_skip_permanent_breakpoint (struct regcache *regcache) | |
959 | { | |
ac7936df | 960 | struct gdbarch *gdbarch = regcache->arch (); |
ae9bb220 | 961 | CORE_ADDR current_pc = regcache_read_pc (regcache); |
ae9bb220 PA |
962 | int bp_len; |
963 | ||
ac298888 | 964 | gdbarch_breakpoint_from_pc (gdbarch, ¤t_pc, &bp_len); |
ae9bb220 PA |
965 | current_pc += bp_len; |
966 | regcache_write_pc (regcache, current_pc); | |
967 | } | |
c0e8c252 | 968 | |
f208eee0 JK |
969 | CORE_ADDR |
970 | default_infcall_mmap (CORE_ADDR size, unsigned prot) | |
971 | { | |
972 | error (_("This target does not support inferior memory allocation by mmap.")); | |
973 | } | |
974 | ||
7f361056 JK |
975 | void |
976 | default_infcall_munmap (CORE_ADDR addr, CORE_ADDR size) | |
977 | { | |
978 | /* Memory reserved by inferior mmap is kept leaked. */ | |
979 | } | |
980 | ||
f208eee0 JK |
981 | /* -mcmodel=large is used so that no GOT (Global Offset Table) is needed to be |
982 | created in inferior memory by GDB (normally it is set by ld.so). */ | |
983 | ||
953cff56 | 984 | std::string |
f208eee0 JK |
985 | default_gcc_target_options (struct gdbarch *gdbarch) |
986 | { | |
953cff56 TT |
987 | return string_printf ("-m%d%s", gdbarch_ptr_bit (gdbarch), |
988 | (gdbarch_ptr_bit (gdbarch) == 64 | |
989 | ? " -mcmodel=large" : "")); | |
f208eee0 JK |
990 | } |
991 | ||
ac04f72b TT |
992 | /* gdbarch gnu_triplet_regexp method. */ |
993 | ||
994 | const char * | |
995 | default_gnu_triplet_regexp (struct gdbarch *gdbarch) | |
996 | { | |
997 | return gdbarch_bfd_arch_info (gdbarch)->arch_name; | |
998 | } | |
999 | ||
05f3c0f0 AB |
1000 | /* Default method for gdbarch_addressable_memory_unit_size. The default is |
1001 | based on the bits_per_byte defined in the bfd library for the current | |
1002 | architecture, this is usually 8-bits, and so this function will usually | |
1003 | return 1 indicating 1 byte is 1 octet. */ | |
3374165f SM |
1004 | |
1005 | int | |
1006 | default_addressable_memory_unit_size (struct gdbarch *gdbarch) | |
1007 | { | |
05f3c0f0 | 1008 | return gdbarch_bfd_arch_info (gdbarch)->bits_per_byte / 8; |
3374165f SM |
1009 | } |
1010 | ||
5f034a78 MK |
1011 | void |
1012 | default_guess_tracepoint_registers (struct gdbarch *gdbarch, | |
1013 | struct regcache *regcache, | |
1014 | CORE_ADDR addr) | |
1015 | { | |
1016 | int pc_regno = gdbarch_pc_regnum (gdbarch); | |
1017 | gdb_byte *regs; | |
1018 | ||
1019 | /* This guessing code below only works if the PC register isn't | |
1020 | a pseudo-register. The value of a pseudo-register isn't stored | |
1021 | in the (non-readonly) regcache -- instead it's recomputed | |
1022 | (probably from some other cached raw register) whenever the | |
1023 | register is read. In this case, a custom method implementation | |
1024 | should be used by the architecture. */ | |
1025 | if (pc_regno < 0 || pc_regno >= gdbarch_num_regs (gdbarch)) | |
1026 | return; | |
1027 | ||
1028 | regs = (gdb_byte *) alloca (register_size (gdbarch, pc_regno)); | |
1029 | store_unsigned_integer (regs, register_size (gdbarch, pc_regno), | |
1030 | gdbarch_byte_order (gdbarch), addr); | |
73e1c03f | 1031 | regcache->raw_supply (pc_regno, regs); |
5f034a78 MK |
1032 | } |
1033 | ||
39503f82 YQ |
1034 | int |
1035 | default_print_insn (bfd_vma memaddr, disassemble_info *info) | |
1036 | { | |
1037 | disassembler_ftype disassemble_fn; | |
1038 | ||
39503f82 | 1039 | disassemble_fn = disassembler (info->arch, info->endian == BFD_ENDIAN_BIG, |
7e10abd1 | 1040 | info->mach, current_program_space->exec_bfd ()); |
39503f82 YQ |
1041 | |
1042 | gdb_assert (disassemble_fn != NULL); | |
1043 | return (*disassemble_fn) (memaddr, info); | |
1044 | } | |
1045 | ||
46a62268 YQ |
1046 | /* See arch-utils.h. */ |
1047 | ||
1048 | CORE_ADDR | |
1049 | gdbarch_skip_prologue_noexcept (gdbarch *gdbarch, CORE_ADDR pc) noexcept | |
1050 | { | |
1051 | CORE_ADDR new_pc = pc; | |
1052 | ||
a70b8144 | 1053 | try |
46a62268 YQ |
1054 | { |
1055 | new_pc = gdbarch_skip_prologue (gdbarch, pc); | |
1056 | } | |
230d2906 | 1057 | catch (const gdb_exception &ex) |
46a62268 | 1058 | {} |
46a62268 YQ |
1059 | |
1060 | return new_pc; | |
1061 | } | |
1062 | ||
1d509aa6 MM |
1063 | /* See arch-utils.h. */ |
1064 | ||
1065 | bool | |
1066 | default_in_indirect_branch_thunk (gdbarch *gdbarch, CORE_ADDR pc) | |
1067 | { | |
1068 | return false; | |
1069 | } | |
1070 | ||
2b4424c3 TT |
1071 | /* See arch-utils.h. */ |
1072 | ||
1073 | ULONGEST | |
1074 | default_type_align (struct gdbarch *gdbarch, struct type *type) | |
1075 | { | |
5561fc30 | 1076 | return 0; |
2b4424c3 TT |
1077 | } |
1078 | ||
aa7ca1bb AH |
1079 | /* See arch-utils.h. */ |
1080 | ||
1081 | std::string | |
bd2b40ac | 1082 | default_get_pc_address_flags (frame_info_ptr frame, CORE_ADDR pc) |
aa7ca1bb AH |
1083 | { |
1084 | return ""; | |
1085 | } | |
1086 | ||
7e183d27 KB |
1087 | /* See arch-utils.h. */ |
1088 | void | |
aa95b2d4 AM |
1089 | default_read_core_file_mappings |
1090 | (struct gdbarch *gdbarch, | |
1091 | struct bfd *cbfd, | |
1092 | read_core_file_mappings_pre_loop_ftype pre_loop_cb, | |
1093 | read_core_file_mappings_loop_ftype loop_cb) | |
7e183d27 KB |
1094 | { |
1095 | } | |
1096 | ||
b93d537f LM |
1097 | /* See arch-utils.h. */ |
1098 | bool | |
1099 | default_use_target_description_from_corefile_notes (struct gdbarch *gdbarch, | |
1100 | struct bfd *corefile_bfd) | |
1101 | { | |
1102 | /* Always trust the corefile target description contained in the target | |
1103 | description note. */ | |
1104 | return true; | |
1105 | } | |
1106 | ||
a0eda3df CL |
1107 | CORE_ADDR |
1108 | default_get_return_buf_addr (struct type *val_type, frame_info_ptr cur_frame) | |
1109 | { | |
1110 | return 0; | |
1111 | } | |
1112 | ||
c1a398a3 CL |
1113 | bool |
1114 | default_dwarf2_omit_typedef_p (struct type *target_type, const char *producer, | |
1115 | const char *name) | |
1116 | { | |
1117 | return false; | |
1118 | } | |
1119 | ||
9df25c34 TT |
1120 | static CORE_ADDR |
1121 | default_update_call_site_pc (struct gdbarch *gdbarch, CORE_ADDR pc) | |
1122 | { | |
1123 | return pc; | |
1124 | } | |
1125 | ||
74fcd19c TT |
1126 | /* Non-zero if we want to trace architecture code. */ |
1127 | ||
1128 | #ifndef GDBARCH_DEBUG | |
1129 | #define GDBARCH_DEBUG 0 | |
1130 | #endif | |
1131 | unsigned int gdbarch_debug = GDBARCH_DEBUG; | |
1132 | static void | |
1133 | show_gdbarch_debug (struct ui_file *file, int from_tty, | |
1134 | struct cmd_list_element *c, const char *value) | |
1135 | { | |
6cb06a8c | 1136 | gdb_printf (file, _("Architecture debugging is %s.\n"), value); |
74fcd19c TT |
1137 | } |
1138 | ||
1139 | static const char * | |
aaa79cd6 | 1140 | pformat (struct gdbarch *gdbarch, const struct floatformat **format) |
74fcd19c TT |
1141 | { |
1142 | if (format == NULL) | |
1143 | return "(null)"; | |
aaa79cd6 TV |
1144 | |
1145 | int format_index = gdbarch_byte_order (gdbarch) == BFD_ENDIAN_LITTLE ? 1 : 0; | |
1146 | return format[format_index]->name; | |
74fcd19c TT |
1147 | } |
1148 | ||
1149 | static const char * | |
1150 | pstring (const char *string) | |
1151 | { | |
1152 | if (string == NULL) | |
1153 | return "(null)"; | |
1154 | return string; | |
1155 | } | |
1156 | ||
1157 | static const char * | |
1158 | pstring_ptr (char **string) | |
1159 | { | |
1160 | if (string == NULL || *string == NULL) | |
1161 | return "(null)"; | |
1162 | return *string; | |
1163 | } | |
1164 | ||
1165 | /* Helper function to print a list of strings, represented as "const | |
1166 | char *const *". The list is printed comma-separated. */ | |
1167 | ||
1168 | static const char * | |
1169 | pstring_list (const char *const *list) | |
1170 | { | |
1171 | static char ret[100]; | |
1172 | const char *const *p; | |
1173 | size_t offset = 0; | |
1174 | ||
1175 | if (list == NULL) | |
1176 | return "(null)"; | |
1177 | ||
1178 | ret[0] = '\0'; | |
1179 | for (p = list; *p != NULL && offset < sizeof (ret); ++p) | |
1180 | { | |
1181 | size_t s = xsnprintf (ret + offset, sizeof (ret) - offset, "%s, ", *p); | |
1182 | offset += 2 + s; | |
1183 | } | |
1184 | ||
1185 | if (offset > 0) | |
1186 | { | |
1187 | gdb_assert (offset - 2 < sizeof (ret)); | |
1188 | ret[offset - 2] = '\0'; | |
1189 | } | |
1190 | ||
1191 | return ret; | |
1192 | } | |
1193 | ||
1194 | #include "gdbarch.c" | |
1195 | ||
43f2b458 TT |
1196 | enum return_value_convention |
1197 | default_gdbarch_return_value | |
1198 | (struct gdbarch *gdbarch, struct value *function, struct type *valtype, | |
1199 | struct regcache *regcache, struct value **read_value, | |
1200 | const gdb_byte *writebuf) | |
1201 | { | |
1202 | gdb_byte *readbuf = nullptr; | |
1203 | ||
1204 | if (read_value != nullptr) | |
1205 | { | |
317c3ed9 | 1206 | *read_value = value::allocate (valtype); |
bbe912ba | 1207 | readbuf = (*read_value)->contents_raw ().data (); |
43f2b458 TT |
1208 | } |
1209 | ||
1210 | return gdbarch->return_value (gdbarch, function, valtype, regcache, | |
1211 | readbuf, writebuf); | |
1212 | } | |
1213 | ||
74fcd19c TT |
1214 | obstack *gdbarch_obstack (gdbarch *arch) |
1215 | { | |
b987c79a | 1216 | return &arch->obstack; |
74fcd19c TT |
1217 | } |
1218 | ||
1219 | /* See gdbarch.h. */ | |
1220 | ||
1221 | char * | |
1222 | gdbarch_obstack_strdup (struct gdbarch *arch, const char *string) | |
1223 | { | |
b987c79a | 1224 | return obstack_strdup (&arch->obstack, string); |
74fcd19c TT |
1225 | } |
1226 | ||
74fcd19c TT |
1227 | /* Free a gdbarch struct. This should never happen in normal |
1228 | operation --- once you've created a gdbarch, you keep it around. | |
1229 | However, if an architecture's init function encounters an error | |
1230 | building the structure, it may need to clean up a partially | |
1231 | constructed gdbarch. */ | |
1232 | ||
1233 | void | |
1234 | gdbarch_free (struct gdbarch *arch) | |
1235 | { | |
74fcd19c TT |
1236 | gdb_assert (arch != NULL); |
1237 | gdb_assert (!arch->initialized_p); | |
b987c79a | 1238 | delete arch; |
74fcd19c TT |
1239 | } |
1240 | ||
08106042 AB |
1241 | /* See gdbarch.h. */ |
1242 | ||
ab25d9bb | 1243 | struct gdbarch_tdep_base * |
08106042 | 1244 | gdbarch_tdep_1 (struct gdbarch *gdbarch) |
74fcd19c TT |
1245 | { |
1246 | if (gdbarch_debug >= 2) | |
08106042 | 1247 | gdb_printf (gdb_stdlog, "gdbarch_tdep_1 called\n"); |
2b16913c | 1248 | return gdbarch->tdep.get (); |
74fcd19c TT |
1249 | } |
1250 | ||
cb275538 TT |
1251 | registry<gdbarch> * |
1252 | registry_accessor<gdbarch>::get (gdbarch *arch) | |
74fcd19c | 1253 | { |
cb275538 | 1254 | return &arch->registry_fields; |
74fcd19c TT |
1255 | } |
1256 | ||
74fcd19c TT |
1257 | /* Keep a registry of the architectures known by GDB. */ |
1258 | ||
1259 | struct gdbarch_registration | |
1260 | { | |
1261 | enum bfd_architecture bfd_architecture; | |
1262 | gdbarch_init_ftype *init; | |
1263 | gdbarch_dump_tdep_ftype *dump_tdep; | |
1a8505cb | 1264 | gdbarch_supports_arch_info_ftype *supports_arch_info; |
74fcd19c TT |
1265 | struct gdbarch_list *arches; |
1266 | struct gdbarch_registration *next; | |
1267 | }; | |
1268 | ||
1269 | static struct gdbarch_registration *gdbarch_registry = NULL; | |
1270 | ||
1271 | std::vector<const char *> | |
1272 | gdbarch_printable_names () | |
1273 | { | |
33b5899f | 1274 | /* Accumulate a list of names based on the registered list of |
74fcd19c TT |
1275 | architectures. */ |
1276 | std::vector<const char *> arches; | |
1277 | ||
1278 | for (gdbarch_registration *rego = gdbarch_registry; | |
1279 | rego != nullptr; | |
1280 | rego = rego->next) | |
1281 | { | |
1282 | const struct bfd_arch_info *ap | |
1283 | = bfd_lookup_arch (rego->bfd_architecture, 0); | |
1284 | if (ap == nullptr) | |
f34652de | 1285 | internal_error (_("gdbarch_architecture_names: multi-arch unknown")); |
74fcd19c TT |
1286 | do |
1287 | { | |
1a8505cb LS |
1288 | if (rego->supports_arch_info == nullptr |
1289 | || rego->supports_arch_info (ap)) | |
1290 | arches.push_back (ap->printable_name); | |
74fcd19c TT |
1291 | ap = ap->next; |
1292 | } | |
1293 | while (ap != NULL); | |
1294 | } | |
1295 | ||
1296 | return arches; | |
1297 | } | |
1298 | ||
1299 | ||
1300 | void | |
1301 | gdbarch_register (enum bfd_architecture bfd_architecture, | |
1302 | gdbarch_init_ftype *init, | |
1a8505cb LS |
1303 | gdbarch_dump_tdep_ftype *dump_tdep, |
1304 | gdbarch_supports_arch_info_ftype *supports_arch_info) | |
74fcd19c TT |
1305 | { |
1306 | struct gdbarch_registration **curr; | |
1307 | const struct bfd_arch_info *bfd_arch_info; | |
1308 | ||
1309 | /* Check that BFD recognizes this architecture */ | |
1310 | bfd_arch_info = bfd_lookup_arch (bfd_architecture, 0); | |
1311 | if (bfd_arch_info == NULL) | |
1312 | { | |
f34652de | 1313 | internal_error (_("gdbarch: Attempt to register " |
74fcd19c TT |
1314 | "unknown architecture (%d)"), |
1315 | bfd_architecture); | |
1316 | } | |
1317 | /* Check that we haven't seen this architecture before. */ | |
1318 | for (curr = &gdbarch_registry; | |
1319 | (*curr) != NULL; | |
1320 | curr = &(*curr)->next) | |
1321 | { | |
1322 | if (bfd_architecture == (*curr)->bfd_architecture) | |
f34652de | 1323 | internal_error (_("gdbarch: Duplicate registration " |
74fcd19c TT |
1324 | "of architecture (%s)"), |
1325 | bfd_arch_info->printable_name); | |
1326 | } | |
1327 | /* log it */ | |
1328 | if (gdbarch_debug) | |
ec29a63c | 1329 | gdb_printf (gdb_stdlog, "gdbarch_register (%s, %s)\n", |
6cb06a8c TT |
1330 | bfd_arch_info->printable_name, |
1331 | host_address_to_string (init)); | |
74fcd19c TT |
1332 | /* Append it */ |
1333 | (*curr) = XNEW (struct gdbarch_registration); | |
1334 | (*curr)->bfd_architecture = bfd_architecture; | |
1335 | (*curr)->init = init; | |
1336 | (*curr)->dump_tdep = dump_tdep; | |
1a8505cb | 1337 | (*curr)->supports_arch_info = supports_arch_info; |
74fcd19c TT |
1338 | (*curr)->arches = NULL; |
1339 | (*curr)->next = NULL; | |
1340 | } | |
1341 | ||
74fcd19c TT |
1342 | /* Look for an architecture using gdbarch_info. */ |
1343 | ||
1344 | struct gdbarch_list * | |
1345 | gdbarch_list_lookup_by_info (struct gdbarch_list *arches, | |
1346 | const struct gdbarch_info *info) | |
1347 | { | |
1348 | for (; arches != NULL; arches = arches->next) | |
1349 | { | |
1350 | if (info->bfd_arch_info != arches->gdbarch->bfd_arch_info) | |
1351 | continue; | |
1352 | if (info->byte_order != arches->gdbarch->byte_order) | |
1353 | continue; | |
1354 | if (info->osabi != arches->gdbarch->osabi) | |
1355 | continue; | |
1356 | if (info->target_desc != arches->gdbarch->target_desc) | |
1357 | continue; | |
1358 | return arches; | |
1359 | } | |
1360 | return NULL; | |
1361 | } | |
1362 | ||
1363 | ||
1364 | /* Find an architecture that matches the specified INFO. Create a new | |
1365 | architecture if needed. Return that new architecture. */ | |
1366 | ||
1367 | struct gdbarch * | |
1368 | gdbarch_find_by_info (struct gdbarch_info info) | |
1369 | { | |
1370 | struct gdbarch *new_gdbarch; | |
1371 | struct gdbarch_registration *rego; | |
1372 | ||
1373 | /* Fill in missing parts of the INFO struct using a number of | |
1374 | sources: "set ..."; INFOabfd supplied; and the global | |
1375 | defaults. */ | |
1376 | gdbarch_info_fill (&info); | |
1377 | ||
1378 | /* Must have found some sort of architecture. */ | |
c7f83b0d | 1379 | gdb_assert (info.bfd_arch_info != nullptr); |
74fcd19c TT |
1380 | |
1381 | if (gdbarch_debug) | |
1382 | { | |
6cb06a8c TT |
1383 | gdb_printf (gdb_stdlog, |
1384 | "gdbarch_find_by_info: info.bfd_arch_info %s\n", | |
c7f83b0d | 1385 | (info.bfd_arch_info != nullptr |
6cb06a8c TT |
1386 | ? info.bfd_arch_info->printable_name |
1387 | : "(null)")); | |
1388 | gdb_printf (gdb_stdlog, | |
1389 | "gdbarch_find_by_info: info.byte_order %d (%s)\n", | |
1390 | info.byte_order, | |
1391 | (info.byte_order == BFD_ENDIAN_BIG ? "big" | |
1392 | : info.byte_order == BFD_ENDIAN_LITTLE ? "little" | |
1393 | : "default")); | |
1394 | gdb_printf (gdb_stdlog, | |
1395 | "gdbarch_find_by_info: info.osabi %d (%s)\n", | |
1396 | info.osabi, gdbarch_osabi_name (info.osabi)); | |
1397 | gdb_printf (gdb_stdlog, | |
1398 | "gdbarch_find_by_info: info.abfd %s\n", | |
1399 | host_address_to_string (info.abfd)); | |
74fcd19c TT |
1400 | } |
1401 | ||
1402 | /* Find the tdep code that knows about this architecture. */ | |
1403 | for (rego = gdbarch_registry; | |
c7f83b0d | 1404 | rego != nullptr; |
74fcd19c TT |
1405 | rego = rego->next) |
1406 | if (rego->bfd_architecture == info.bfd_arch_info->arch) | |
1407 | break; | |
c7f83b0d | 1408 | if (rego == nullptr) |
74fcd19c TT |
1409 | { |
1410 | if (gdbarch_debug) | |
6cb06a8c TT |
1411 | gdb_printf (gdb_stdlog, "gdbarch_find_by_info: " |
1412 | "No matching architecture\n"); | |
c7f83b0d | 1413 | return nullptr; |
74fcd19c TT |
1414 | } |
1415 | ||
1416 | /* Ask the tdep code for an architecture that matches "info". */ | |
1417 | new_gdbarch = rego->init (info, rego->arches); | |
1418 | ||
1419 | /* Did the tdep code like it? No. Reject the change and revert to | |
1420 | the old architecture. */ | |
c7f83b0d | 1421 | if (new_gdbarch == nullptr) |
74fcd19c TT |
1422 | { |
1423 | if (gdbarch_debug) | |
6cb06a8c TT |
1424 | gdb_printf (gdb_stdlog, "gdbarch_find_by_info: " |
1425 | "Target rejected architecture\n"); | |
c7f83b0d | 1426 | return nullptr; |
74fcd19c TT |
1427 | } |
1428 | ||
1429 | /* Is this a pre-existing architecture (as determined by already | |
1430 | being initialized)? Move it to the front of the architecture | |
1431 | list (keeping the list sorted Most Recently Used). */ | |
1432 | if (new_gdbarch->initialized_p) | |
1433 | { | |
1434 | struct gdbarch_list **list; | |
1435 | struct gdbarch_list *self; | |
1436 | if (gdbarch_debug) | |
6cb06a8c TT |
1437 | gdb_printf (gdb_stdlog, "gdbarch_find_by_info: " |
1438 | "Previous architecture %s (%s) selected\n", | |
1439 | host_address_to_string (new_gdbarch), | |
1440 | new_gdbarch->bfd_arch_info->printable_name); | |
74fcd19c TT |
1441 | /* Find the existing arch in the list. */ |
1442 | for (list = ®o->arches; | |
c7f83b0d | 1443 | (*list) != nullptr && (*list)->gdbarch != new_gdbarch; |
74fcd19c TT |
1444 | list = &(*list)->next); |
1445 | /* It had better be in the list of architectures. */ | |
c7f83b0d | 1446 | gdb_assert ((*list) != nullptr && (*list)->gdbarch == new_gdbarch); |
74fcd19c TT |
1447 | /* Unlink SELF. */ |
1448 | self = (*list); | |
1449 | (*list) = self->next; | |
1450 | /* Insert SELF at the front. */ | |
1451 | self->next = rego->arches; | |
1452 | rego->arches = self; | |
1453 | /* Return it. */ | |
1454 | return new_gdbarch; | |
1455 | } | |
1456 | ||
1457 | /* It's a new architecture. */ | |
1458 | if (gdbarch_debug) | |
6cb06a8c TT |
1459 | gdb_printf (gdb_stdlog, "gdbarch_find_by_info: " |
1460 | "New architecture %s (%s) selected\n", | |
1461 | host_address_to_string (new_gdbarch), | |
1462 | new_gdbarch->bfd_arch_info->printable_name); | |
74fcd19c TT |
1463 | |
1464 | /* Insert the new architecture into the front of the architecture | |
1465 | list (keep the list sorted Most Recently Used). */ | |
1466 | { | |
1467 | struct gdbarch_list *self = XNEW (struct gdbarch_list); | |
1468 | self->next = rego->arches; | |
1469 | self->gdbarch = new_gdbarch; | |
1470 | rego->arches = self; | |
1471 | } | |
1472 | ||
1473 | /* Check that the newly installed architecture is valid. Plug in | |
1474 | any post init values. */ | |
1475 | new_gdbarch->dump_tdep = rego->dump_tdep; | |
1476 | verify_gdbarch (new_gdbarch); | |
0655397b | 1477 | new_gdbarch->initialized_p = true; |
74fcd19c TT |
1478 | |
1479 | if (gdbarch_debug) | |
1480 | gdbarch_dump (new_gdbarch, gdb_stdlog); | |
1481 | ||
1482 | return new_gdbarch; | |
1483 | } | |
1484 | ||
72c4529c | 1485 | /* See gdbarch.h. */ |
74fcd19c | 1486 | |
72c4529c SM |
1487 | bool |
1488 | gdbarch_initialized_p (gdbarch *arch) | |
74fcd19c | 1489 | { |
72c4529c | 1490 | return arch->initialized_p; |
74fcd19c TT |
1491 | } |
1492 | ||
1493 | /* Return the current inferior's arch. */ | |
1494 | ||
1495 | struct gdbarch * | |
1496 | target_gdbarch (void) | |
1497 | { | |
27b1f19f | 1498 | return current_inferior ()->arch (); |
74fcd19c TT |
1499 | } |
1500 | ||
6c265988 | 1501 | void _initialize_gdbarch_utils (); |
c0e8c252 | 1502 | void |
6c265988 | 1503 | _initialize_gdbarch_utils () |
c0e8c252 | 1504 | { |
7ab04401 | 1505 | add_setshow_enum_cmd ("endian", class_support, |
3e43a32a MS |
1506 | endian_enum, &set_endian_string, |
1507 | _("Set endianness of target."), | |
1508 | _("Show endianness of target."), | |
1509 | NULL, set_endian, show_endian, | |
7ab04401 | 1510 | &setlist, &showlist); |
74fcd19c TT |
1511 | add_setshow_zuinteger_cmd ("arch", class_maintenance, &gdbarch_debug, _("\ |
1512 | Set architecture debugging."), _("\ | |
1513 | Show architecture debugging."), _("\ | |
1514 | When non-zero, architecture debugging is enabled."), | |
1515 | NULL, | |
1516 | show_gdbarch_debug, | |
1517 | &setdebuglist, &showdebuglist); | |
c0e8c252 | 1518 | } |