Commit | Line | Data |
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c0e8c252 | 1 | /* Dynamic architecture support for GDB, the GNU debugger. |
f4f9705a | 2 | |
61baf725 | 3 | Copyright (C) 1998-2017 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" |
3e29f34a | 34 | #include "symtab.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); | |
224c3ddb | 47 | gdb_byte *buf = (gdb_byte *) xmalloc (len); |
237fc4c9 PA |
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 | ||
99e40580 UW |
70 | int |
71 | default_displaced_step_hw_singlestep (struct gdbarch *gdbarch, | |
72 | struct displaced_step_closure *closure) | |
73 | { | |
74 | return !gdbarch_software_single_step_p (gdbarch); | |
75 | } | |
237fc4c9 PA |
76 | |
77 | CORE_ADDR | |
78 | displaced_step_at_entry_point (struct gdbarch *gdbarch) | |
79 | { | |
80 | CORE_ADDR addr; | |
81 | int bp_len; | |
82 | ||
83 | addr = entry_point_address (); | |
84 | ||
237fc4c9 PA |
85 | /* Inferior calls also use the entry point as a breakpoint location. |
86 | We don't want displaced stepping to interfere with those | |
87 | breakpoints, so leave space. */ | |
88 | gdbarch_breakpoint_from_pc (gdbarch, &addr, &bp_len); | |
5931a2fa | 89 | addr += bp_len * 2; |
237fc4c9 PA |
90 | |
91 | return addr; | |
92 | } | |
93 | ||
4182591f | 94 | int |
e7faf938 | 95 | legacy_register_sim_regno (struct gdbarch *gdbarch, int regnum) |
4182591f AC |
96 | { |
97 | /* Only makes sense to supply raw registers. */ | |
e7faf938 | 98 | gdb_assert (regnum >= 0 && regnum < gdbarch_num_regs (gdbarch)); |
4182591f AC |
99 | /* NOTE: cagney/2002-05-13: The old code did it this way and it is |
100 | suspected that some GDB/SIM combinations may rely on this | |
101 | behavour. The default should be one2one_register_sim_regno | |
102 | (below). */ | |
e7faf938 MD |
103 | if (gdbarch_register_name (gdbarch, regnum) != NULL |
104 | && gdbarch_register_name (gdbarch, regnum)[0] != '\0') | |
4182591f AC |
105 | return regnum; |
106 | else | |
107 | return LEGACY_SIM_REGNO_IGNORE; | |
108 | } | |
109 | ||
bdcd319a | 110 | CORE_ADDR |
52f729a7 | 111 | generic_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc) |
bdcd319a CV |
112 | { |
113 | return 0; | |
114 | } | |
115 | ||
dea0c52f | 116 | CORE_ADDR |
4c8c40e6 | 117 | generic_skip_solib_resolver (struct gdbarch *gdbarch, CORE_ADDR pc) |
dea0c52f MK |
118 | { |
119 | return 0; | |
120 | } | |
121 | ||
d50355b6 | 122 | int |
e17a4113 | 123 | generic_in_solib_return_trampoline (struct gdbarch *gdbarch, |
2c02bd72 | 124 | CORE_ADDR pc, const char *name) |
d50355b6 MS |
125 | { |
126 | return 0; | |
127 | } | |
128 | ||
c12260ac | 129 | int |
c9cf6e20 | 130 | generic_stack_frame_destroyed_p (struct gdbarch *gdbarch, CORE_ADDR pc) |
c12260ac CV |
131 | { |
132 | return 0; | |
133 | } | |
134 | ||
7eb89530 YQ |
135 | int |
136 | default_code_of_frame_writable (struct gdbarch *gdbarch, | |
137 | struct frame_info *frame) | |
138 | { | |
139 | return 1; | |
140 | } | |
141 | ||
4d1e7dd1 | 142 | /* Helper functions for gdbarch_inner_than */ |
3339cf8b AC |
143 | |
144 | int | |
fba45db2 | 145 | core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs) |
3339cf8b AC |
146 | { |
147 | return (lhs < rhs); | |
148 | } | |
149 | ||
150 | int | |
fba45db2 | 151 | core_addr_greaterthan (CORE_ADDR lhs, CORE_ADDR rhs) |
3339cf8b AC |
152 | { |
153 | return (lhs > rhs); | |
154 | } | |
155 | ||
0e2de366 | 156 | /* Misc helper functions for targets. */ |
193e3b1a | 157 | |
f517ea4e | 158 | CORE_ADDR |
24568a2c | 159 | core_addr_identity (struct gdbarch *gdbarch, CORE_ADDR addr) |
f517ea4e PS |
160 | { |
161 | return addr; | |
162 | } | |
163 | ||
e2d0e7eb AC |
164 | CORE_ADDR |
165 | convert_from_func_ptr_addr_identity (struct gdbarch *gdbarch, CORE_ADDR addr, | |
166 | struct target_ops *targ) | |
167 | { | |
168 | return addr; | |
169 | } | |
170 | ||
88c72b7d | 171 | int |
d3f73121 | 172 | no_op_reg_to_regnum (struct gdbarch *gdbarch, int reg) |
88c72b7d AC |
173 | { |
174 | return reg; | |
175 | } | |
176 | ||
a2cf933a | 177 | void |
3e29f34a | 178 | default_coff_make_msymbol_special (int val, struct minimal_symbol *msym) |
a2cf933a EZ |
179 | { |
180 | return; | |
181 | } | |
182 | ||
3e29f34a MR |
183 | /* See arch-utils.h. */ |
184 | ||
a2cf933a | 185 | void |
3e29f34a | 186 | default_make_symbol_special (struct symbol *sym, struct objfile *objfile) |
a2cf933a EZ |
187 | { |
188 | return; | |
189 | } | |
190 | ||
3e29f34a MR |
191 | /* See arch-utils.h. */ |
192 | ||
193 | CORE_ADDR | |
194 | default_adjust_dwarf2_addr (CORE_ADDR pc) | |
195 | { | |
196 | return pc; | |
197 | } | |
198 | ||
199 | /* See arch-utils.h. */ | |
200 | ||
201 | CORE_ADDR | |
202 | default_adjust_dwarf2_line (CORE_ADDR addr, int rel) | |
203 | { | |
204 | return addr; | |
205 | } | |
206 | ||
b41c5a85 JW |
207 | /* See arch-utils.h. */ |
208 | ||
209 | bool | |
210 | default_execute_dwarf_cfa_vendor_op (struct gdbarch *gdbarch, gdb_byte op, | |
211 | struct dwarf2_frame_state *fs) | |
212 | { | |
213 | return false; | |
214 | } | |
215 | ||
01fb7433 | 216 | int |
64a3914f | 217 | cannot_register_not (struct gdbarch *gdbarch, int regnum) |
01fb7433 AC |
218 | { |
219 | return 0; | |
220 | } | |
39d4ef09 AC |
221 | |
222 | /* Legacy version of target_virtual_frame_pointer(). Assumes that | |
0e2de366 MS |
223 | there is an gdbarch_deprecated_fp_regnum and that it is the same, |
224 | cooked or raw. */ | |
39d4ef09 AC |
225 | |
226 | void | |
a54fba4c MD |
227 | legacy_virtual_frame_pointer (struct gdbarch *gdbarch, |
228 | CORE_ADDR pc, | |
39d4ef09 AC |
229 | int *frame_regnum, |
230 | LONGEST *frame_offset) | |
231 | { | |
20bcf01c AC |
232 | /* FIXME: cagney/2002-09-13: This code is used when identifying the |
233 | frame pointer of the current PC. It is assuming that a single | |
234 | register and an offset can determine this. I think it should | |
235 | instead generate a byte code expression as that would work better | |
236 | with things like Dwarf2's CFI. */ | |
a54fba4c MD |
237 | if (gdbarch_deprecated_fp_regnum (gdbarch) >= 0 |
238 | && gdbarch_deprecated_fp_regnum (gdbarch) | |
239 | < gdbarch_num_regs (gdbarch)) | |
240 | *frame_regnum = gdbarch_deprecated_fp_regnum (gdbarch); | |
241 | else if (gdbarch_sp_regnum (gdbarch) >= 0 | |
242 | && gdbarch_sp_regnum (gdbarch) | |
243 | < gdbarch_num_regs (gdbarch)) | |
244 | *frame_regnum = gdbarch_sp_regnum (gdbarch); | |
20bcf01c AC |
245 | else |
246 | /* Should this be an internal error? I guess so, it is reflecting | |
247 | an architectural limitation in the current design. */ | |
0e2de366 MS |
248 | internal_error (__FILE__, __LINE__, |
249 | _("No virtual frame pointer available")); | |
39d4ef09 AC |
250 | *frame_offset = 0; |
251 | } | |
46cd78fb | 252 | |
9b790ce7 UW |
253 | /* Return a floating-point format for a floating-point variable of |
254 | length LEN in bits. If non-NULL, NAME is the name of its type. | |
255 | If no suitable type is found, return NULL. */ | |
256 | ||
257 | const struct floatformat ** | |
258 | default_floatformat_for_type (struct gdbarch *gdbarch, | |
259 | const char *name, int len) | |
260 | { | |
261 | const struct floatformat **format = NULL; | |
262 | ||
263 | if (len == gdbarch_half_bit (gdbarch)) | |
264 | format = gdbarch_half_format (gdbarch); | |
265 | else if (len == gdbarch_float_bit (gdbarch)) | |
266 | format = gdbarch_float_format (gdbarch); | |
267 | else if (len == gdbarch_double_bit (gdbarch)) | |
268 | format = gdbarch_double_format (gdbarch); | |
269 | else if (len == gdbarch_long_double_bit (gdbarch)) | |
270 | format = gdbarch_long_double_format (gdbarch); | |
271 | /* On i386 the 'long double' type takes 96 bits, | |
272 | while the real number of used bits is only 80, | |
273 | both in processor and in memory. | |
274 | The code below accepts the real bit size. */ | |
275 | else if (gdbarch_long_double_format (gdbarch) != NULL | |
276 | && len == gdbarch_long_double_format (gdbarch)[0]->totalsize) | |
277 | format = gdbarch_long_double_format (gdbarch); | |
278 | ||
279 | return format; | |
280 | } | |
d7bd68ca | 281 | \f |
13d01224 | 282 | int |
76a8ddb9 UW |
283 | generic_convert_register_p (struct gdbarch *gdbarch, int regnum, |
284 | struct type *type) | |
13d01224 | 285 | { |
9730f241 | 286 | return 0; |
13d01224 AC |
287 | } |
288 | ||
192cb3d4 MK |
289 | int |
290 | default_stabs_argument_has_addr (struct gdbarch *gdbarch, struct type *type) | |
291 | { | |
192cb3d4 MK |
292 | return 0; |
293 | } | |
294 | ||
3ca64954 RC |
295 | int |
296 | generic_instruction_nullified (struct gdbarch *gdbarch, | |
297 | struct regcache *regcache) | |
298 | { | |
299 | return 0; | |
300 | } | |
301 | ||
123dc839 DJ |
302 | int |
303 | default_remote_register_number (struct gdbarch *gdbarch, | |
304 | int regno) | |
305 | { | |
306 | return regno; | |
307 | } | |
308 | ||
3437254d PA |
309 | /* See arch-utils.h. */ |
310 | ||
311 | int | |
312 | default_vsyscall_range (struct gdbarch *gdbarch, struct mem_range *range) | |
313 | { | |
314 | return 0; | |
315 | } | |
316 | ||
01fb7433 | 317 | \f |
b4a20239 AC |
318 | /* Functions to manipulate the endianness of the target. */ |
319 | ||
f486487f | 320 | static enum bfd_endian target_byte_order_user = BFD_ENDIAN_UNKNOWN; |
b4a20239 | 321 | |
53904c9e AC |
322 | static const char endian_big[] = "big"; |
323 | static const char endian_little[] = "little"; | |
324 | static const char endian_auto[] = "auto"; | |
40478521 | 325 | static const char *const endian_enum[] = |
b4a20239 AC |
326 | { |
327 | endian_big, | |
328 | endian_little, | |
329 | endian_auto, | |
330 | NULL, | |
331 | }; | |
53904c9e | 332 | static const char *set_endian_string; |
b4a20239 | 333 | |
b6d373df DJ |
334 | enum bfd_endian |
335 | selected_byte_order (void) | |
336 | { | |
e17c207e | 337 | return target_byte_order_user; |
b6d373df DJ |
338 | } |
339 | ||
b4a20239 AC |
340 | /* Called by ``show endian''. */ |
341 | ||
342 | static void | |
7ab04401 AC |
343 | show_endian (struct ui_file *file, int from_tty, struct cmd_list_element *c, |
344 | const char *value) | |
b4a20239 | 345 | { |
7b6b9e83 | 346 | if (target_byte_order_user == BFD_ENDIAN_UNKNOWN) |
e17c207e | 347 | if (gdbarch_byte_order (get_current_arch ()) == BFD_ENDIAN_BIG) |
7ab04401 AC |
348 | fprintf_unfiltered (file, _("The target endianness is set automatically " |
349 | "(currently big endian)\n")); | |
edefbb7c | 350 | else |
7ab04401 | 351 | fprintf_unfiltered (file, _("The target endianness is set automatically " |
3e43a32a | 352 | "(currently little endian)\n")); |
b4a20239 | 353 | else |
e17c207e | 354 | if (target_byte_order_user == BFD_ENDIAN_BIG) |
7ab04401 AC |
355 | fprintf_unfiltered (file, |
356 | _("The target is assumed to be big endian\n")); | |
357 | else | |
358 | fprintf_unfiltered (file, | |
359 | _("The target is assumed to be little endian\n")); | |
b4a20239 AC |
360 | } |
361 | ||
362 | static void | |
363 | set_endian (char *ignore_args, int from_tty, struct cmd_list_element *c) | |
364 | { | |
7a107747 DJ |
365 | struct gdbarch_info info; |
366 | ||
367 | gdbarch_info_init (&info); | |
368 | ||
3fd3d7d2 | 369 | if (set_endian_string == endian_auto) |
b4a20239 | 370 | { |
7a107747 DJ |
371 | target_byte_order_user = BFD_ENDIAN_UNKNOWN; |
372 | if (! gdbarch_update_p (info)) | |
373 | internal_error (__FILE__, __LINE__, | |
374 | _("set_endian: architecture update failed")); | |
b4a20239 AC |
375 | } |
376 | else if (set_endian_string == endian_little) | |
377 | { | |
d90cf509 AC |
378 | info.byte_order = BFD_ENDIAN_LITTLE; |
379 | if (! gdbarch_update_p (info)) | |
edefbb7c | 380 | printf_unfiltered (_("Little endian target not supported by GDB\n")); |
7a107747 DJ |
381 | else |
382 | target_byte_order_user = BFD_ENDIAN_LITTLE; | |
b4a20239 AC |
383 | } |
384 | else if (set_endian_string == endian_big) | |
385 | { | |
d90cf509 AC |
386 | info.byte_order = BFD_ENDIAN_BIG; |
387 | if (! gdbarch_update_p (info)) | |
edefbb7c | 388 | printf_unfiltered (_("Big endian target not supported by GDB\n")); |
7a107747 DJ |
389 | else |
390 | target_byte_order_user = BFD_ENDIAN_BIG; | |
b4a20239 AC |
391 | } |
392 | else | |
8e65ff28 | 393 | internal_error (__FILE__, __LINE__, |
edefbb7c | 394 | _("set_endian: bad value")); |
7a107747 | 395 | |
7ab04401 | 396 | show_endian (gdb_stdout, from_tty, NULL, NULL); |
b4a20239 AC |
397 | } |
398 | ||
23181151 | 399 | /* Given SELECTED, a currently selected BFD architecture, and |
e35359c5 UW |
400 | TARGET_DESC, the current target description, return what |
401 | architecture to use. | |
402 | ||
403 | SELECTED may be NULL, in which case we return the architecture | |
404 | associated with TARGET_DESC. If SELECTED specifies a variant | |
405 | of the architecture associtated with TARGET_DESC, return the | |
406 | more specific of the two. | |
407 | ||
408 | If SELECTED is a different architecture, but it is accepted as | |
409 | compatible by the target, we can use the target architecture. | |
410 | ||
411 | If SELECTED is obviously incompatible, warn the user. */ | |
23181151 DJ |
412 | |
413 | static const struct bfd_arch_info * | |
e35359c5 UW |
414 | choose_architecture_for_target (const struct target_desc *target_desc, |
415 | const struct bfd_arch_info *selected) | |
23181151 | 416 | { |
e35359c5 | 417 | const struct bfd_arch_info *from_target = tdesc_architecture (target_desc); |
23181151 DJ |
418 | const struct bfd_arch_info *compat1, *compat2; |
419 | ||
420 | if (selected == NULL) | |
421 | return from_target; | |
422 | ||
423 | if (from_target == NULL) | |
424 | return selected; | |
425 | ||
426 | /* struct bfd_arch_info objects are singletons: that is, there's | |
427 | supposed to be exactly one instance for a given machine. So you | |
428 | can tell whether two are equivalent by comparing pointers. */ | |
429 | if (from_target == selected) | |
430 | return selected; | |
431 | ||
432 | /* BFD's 'A->compatible (A, B)' functions return zero if A and B are | |
433 | incompatible. But if they are compatible, it returns the 'more | |
434 | featureful' of the two arches. That is, if A can run code | |
435 | written for B, but B can't run code written for A, then it'll | |
436 | return A. | |
437 | ||
438 | Some targets (e.g. MIPS as of 2006-12-04) don't fully | |
439 | implement this, instead always returning NULL or the first | |
440 | argument. We detect that case by checking both directions. */ | |
441 | ||
442 | compat1 = selected->compatible (selected, from_target); | |
443 | compat2 = from_target->compatible (from_target, selected); | |
444 | ||
445 | if (compat1 == NULL && compat2 == NULL) | |
446 | { | |
0e2de366 MS |
447 | /* BFD considers the architectures incompatible. Check our |
448 | target description whether it accepts SELECTED as compatible | |
449 | anyway. */ | |
e35359c5 UW |
450 | if (tdesc_compatible_p (target_desc, selected)) |
451 | return from_target; | |
452 | ||
23181151 DJ |
453 | warning (_("Selected architecture %s is not compatible " |
454 | "with reported target architecture %s"), | |
455 | selected->printable_name, from_target->printable_name); | |
456 | return selected; | |
457 | } | |
458 | ||
459 | if (compat1 == NULL) | |
460 | return compat2; | |
461 | if (compat2 == NULL) | |
462 | return compat1; | |
463 | if (compat1 == compat2) | |
464 | return compat1; | |
465 | ||
0e2de366 MS |
466 | /* If the two didn't match, but one of them was a default |
467 | architecture, assume the more specific one is correct. This | |
468 | handles the case where an executable or target description just | |
469 | says "mips", but the other knows which MIPS variant. */ | |
23181151 DJ |
470 | if (compat1->the_default) |
471 | return compat2; | |
472 | if (compat2->the_default) | |
473 | return compat1; | |
474 | ||
475 | /* We have no idea which one is better. This is a bug, but not | |
476 | a critical problem; warn the user. */ | |
477 | warning (_("Selected architecture %s is ambiguous with " | |
478 | "reported target architecture %s"), | |
479 | selected->printable_name, from_target->printable_name); | |
480 | return selected; | |
481 | } | |
482 | ||
0e2de366 | 483 | /* Functions to manipulate the architecture of the target. */ |
b4a20239 AC |
484 | |
485 | enum set_arch { set_arch_auto, set_arch_manual }; | |
486 | ||
7a107747 | 487 | static const struct bfd_arch_info *target_architecture_user; |
b4a20239 | 488 | |
a8cf2722 AC |
489 | static const char *set_architecture_string; |
490 | ||
491 | const char * | |
492 | selected_architecture_name (void) | |
493 | { | |
7a107747 | 494 | if (target_architecture_user == NULL) |
a8cf2722 AC |
495 | return NULL; |
496 | else | |
497 | return set_architecture_string; | |
498 | } | |
b4a20239 | 499 | |
b4a20239 | 500 | /* Called if the user enters ``show architecture'' without an |
0e2de366 | 501 | argument. */ |
b4a20239 AC |
502 | |
503 | static void | |
7ab04401 AC |
504 | show_architecture (struct ui_file *file, int from_tty, |
505 | struct cmd_list_element *c, const char *value) | |
b4a20239 | 506 | { |
7a107747 | 507 | if (target_architecture_user == NULL) |
3e43a32a MS |
508 | fprintf_filtered (file, _("The target architecture is set " |
509 | "automatically (currently %s)\n"), | |
510 | gdbarch_bfd_arch_info (get_current_arch ())->printable_name); | |
b4a20239 | 511 | else |
3e43a32a MS |
512 | fprintf_filtered (file, _("The target architecture is assumed to be %s\n"), |
513 | set_architecture_string); | |
b4a20239 AC |
514 | } |
515 | ||
516 | ||
517 | /* Called if the user enters ``set architecture'' with or without an | |
0e2de366 | 518 | argument. */ |
b4a20239 AC |
519 | |
520 | static void | |
521 | set_architecture (char *ignore_args, int from_tty, struct cmd_list_element *c) | |
522 | { | |
7a107747 DJ |
523 | struct gdbarch_info info; |
524 | ||
525 | gdbarch_info_init (&info); | |
526 | ||
b4a20239 AC |
527 | if (strcmp (set_architecture_string, "auto") == 0) |
528 | { | |
7a107747 DJ |
529 | target_architecture_user = NULL; |
530 | if (!gdbarch_update_p (info)) | |
531 | internal_error (__FILE__, __LINE__, | |
532 | _("could not select an architecture automatically")); | |
b4a20239 | 533 | } |
d90cf509 | 534 | else |
b4a20239 | 535 | { |
b4a20239 AC |
536 | info.bfd_arch_info = bfd_scan_arch (set_architecture_string); |
537 | if (info.bfd_arch_info == NULL) | |
8e65ff28 | 538 | internal_error (__FILE__, __LINE__, |
edefbb7c | 539 | _("set_architecture: bfd_scan_arch failed")); |
16f33e29 | 540 | if (gdbarch_update_p (info)) |
7a107747 | 541 | target_architecture_user = info.bfd_arch_info; |
b4a20239 | 542 | else |
edefbb7c | 543 | printf_unfiltered (_("Architecture `%s' not recognized.\n"), |
b4a20239 AC |
544 | set_architecture_string); |
545 | } | |
7ab04401 | 546 | show_architecture (gdb_stdout, from_tty, NULL, NULL); |
b4a20239 AC |
547 | } |
548 | ||
ebdba546 | 549 | /* Try to select a global architecture that matches "info". Return |
0f9741f2 | 550 | non-zero if the attempt succeeds. */ |
ebdba546 AC |
551 | int |
552 | gdbarch_update_p (struct gdbarch_info info) | |
553 | { | |
a7f1256d UW |
554 | struct gdbarch *new_gdbarch; |
555 | ||
556 | /* Check for the current file. */ | |
557 | if (info.abfd == NULL) | |
558 | info.abfd = exec_bfd; | |
559 | if (info.abfd == NULL) | |
560 | info.abfd = core_bfd; | |
561 | ||
562 | /* Check for the current target description. */ | |
563 | if (info.target_desc == NULL) | |
564 | info.target_desc = target_current_description (); | |
565 | ||
566 | new_gdbarch = gdbarch_find_by_info (info); | |
ebdba546 AC |
567 | |
568 | /* If there no architecture by that name, reject the request. */ | |
569 | if (new_gdbarch == NULL) | |
570 | { | |
571 | if (gdbarch_debug) | |
572 | fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: " | |
573 | "Architecture not found\n"); | |
574 | return 0; | |
575 | } | |
576 | ||
577 | /* If it is the same old architecture, accept the request (but don't | |
578 | swap anything). */ | |
f5656ead | 579 | if (new_gdbarch == target_gdbarch ()) |
ebdba546 AC |
580 | { |
581 | if (gdbarch_debug) | |
582 | fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: " | |
e3cb3832 JB |
583 | "Architecture %s (%s) unchanged\n", |
584 | host_address_to_string (new_gdbarch), | |
ebdba546 AC |
585 | gdbarch_bfd_arch_info (new_gdbarch)->printable_name); |
586 | return 1; | |
587 | } | |
588 | ||
589 | /* It's a new architecture, swap it in. */ | |
590 | if (gdbarch_debug) | |
591 | fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: " | |
e3cb3832 JB |
592 | "New architecture %s (%s) selected\n", |
593 | host_address_to_string (new_gdbarch), | |
ebdba546 | 594 | gdbarch_bfd_arch_info (new_gdbarch)->printable_name); |
aff68abb | 595 | set_target_gdbarch (new_gdbarch); |
ebdba546 AC |
596 | |
597 | return 1; | |
598 | } | |
599 | ||
2b026650 MK |
600 | /* Return the architecture for ABFD. If no suitable architecture |
601 | could be find, return NULL. */ | |
602 | ||
603 | struct gdbarch * | |
604 | gdbarch_from_bfd (bfd *abfd) | |
b4a20239 | 605 | { |
d90cf509 AC |
606 | struct gdbarch_info info; |
607 | gdbarch_info_init (&info); | |
05c547f6 | 608 | |
d90cf509 | 609 | info.abfd = abfd; |
b60eb90d | 610 | return gdbarch_find_by_info (info); |
2b026650 MK |
611 | } |
612 | ||
613 | /* Set the dynamic target-system-dependent parameters (architecture, | |
614 | byte-order) using information found in the BFD */ | |
615 | ||
616 | void | |
617 | set_gdbarch_from_file (bfd *abfd) | |
618 | { | |
a7f1256d | 619 | struct gdbarch_info info; |
2b026650 MK |
620 | struct gdbarch *gdbarch; |
621 | ||
a7f1256d UW |
622 | gdbarch_info_init (&info); |
623 | info.abfd = abfd; | |
624 | info.target_desc = target_current_description (); | |
625 | gdbarch = gdbarch_find_by_info (info); | |
626 | ||
2b026650 | 627 | if (gdbarch == NULL) |
8a3fe4f8 | 628 | error (_("Architecture of file not recognized.")); |
aff68abb | 629 | set_target_gdbarch (gdbarch); |
b4a20239 AC |
630 | } |
631 | ||
632 | /* Initialize the current architecture. Update the ``set | |
633 | architecture'' command so that it specifies a list of valid | |
634 | architectures. */ | |
635 | ||
1ba607ad AC |
636 | #ifdef DEFAULT_BFD_ARCH |
637 | extern const bfd_arch_info_type DEFAULT_BFD_ARCH; | |
638 | static const bfd_arch_info_type *default_bfd_arch = &DEFAULT_BFD_ARCH; | |
639 | #else | |
4b9b3959 | 640 | static const bfd_arch_info_type *default_bfd_arch; |
1ba607ad AC |
641 | #endif |
642 | ||
643 | #ifdef DEFAULT_BFD_VEC | |
644 | extern const bfd_target DEFAULT_BFD_VEC; | |
645 | static const bfd_target *default_bfd_vec = &DEFAULT_BFD_VEC; | |
646 | #else | |
647 | static const bfd_target *default_bfd_vec; | |
648 | #endif | |
649 | ||
f486487f | 650 | static enum bfd_endian default_byte_order = BFD_ENDIAN_UNKNOWN; |
7a107747 | 651 | |
b4a20239 AC |
652 | void |
653 | initialize_current_architecture (void) | |
654 | { | |
655 | const char **arches = gdbarch_printable_names (); | |
05c547f6 | 656 | struct gdbarch_info info; |
b4a20239 | 657 | |
0e2de366 | 658 | /* determine a default architecture and byte order. */ |
fb6ecb0f | 659 | gdbarch_info_init (&info); |
1ba607ad | 660 | |
0e2de366 | 661 | /* Find a default architecture. */ |
7a107747 | 662 | if (default_bfd_arch == NULL) |
b4a20239 | 663 | { |
1ba607ad | 664 | /* Choose the architecture by taking the first one |
0e2de366 | 665 | alphabetically. */ |
1ba607ad | 666 | const char *chosen = arches[0]; |
b4a20239 | 667 | const char **arch; |
b4a20239 AC |
668 | for (arch = arches; *arch != NULL; arch++) |
669 | { | |
b4a20239 AC |
670 | if (strcmp (*arch, chosen) < 0) |
671 | chosen = *arch; | |
672 | } | |
673 | if (chosen == NULL) | |
8e65ff28 | 674 | internal_error (__FILE__, __LINE__, |
edefbb7c | 675 | _("initialize_current_architecture: No arch")); |
7a107747 DJ |
676 | default_bfd_arch = bfd_scan_arch (chosen); |
677 | if (default_bfd_arch == NULL) | |
8e65ff28 | 678 | internal_error (__FILE__, __LINE__, |
edefbb7c | 679 | _("initialize_current_architecture: Arch not found")); |
1ba607ad AC |
680 | } |
681 | ||
7a107747 DJ |
682 | info.bfd_arch_info = default_bfd_arch; |
683 | ||
afe64c1a | 684 | /* Take several guesses at a byte order. */ |
7a107747 | 685 | if (default_byte_order == BFD_ENDIAN_UNKNOWN |
1ba607ad AC |
686 | && default_bfd_vec != NULL) |
687 | { | |
0e2de366 | 688 | /* Extract BFD's default vector's byte order. */ |
1ba607ad AC |
689 | switch (default_bfd_vec->byteorder) |
690 | { | |
691 | case BFD_ENDIAN_BIG: | |
7a107747 | 692 | default_byte_order = BFD_ENDIAN_BIG; |
1ba607ad AC |
693 | break; |
694 | case BFD_ENDIAN_LITTLE: | |
7a107747 | 695 | default_byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad AC |
696 | break; |
697 | default: | |
698 | break; | |
699 | } | |
700 | } | |
7a107747 | 701 | if (default_byte_order == BFD_ENDIAN_UNKNOWN) |
1ba607ad | 702 | { |
0e2de366 | 703 | /* look for ``*el-*'' in the target name. */ |
1ba607ad AC |
704 | const char *chp; |
705 | chp = strchr (target_name, '-'); | |
706 | if (chp != NULL | |
707 | && chp - 2 >= target_name | |
61012eef | 708 | && startswith (chp - 2, "el")) |
7a107747 | 709 | default_byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad | 710 | } |
7a107747 | 711 | if (default_byte_order == BFD_ENDIAN_UNKNOWN) |
1ba607ad AC |
712 | { |
713 | /* Wire it to big-endian!!! */ | |
7a107747 | 714 | default_byte_order = BFD_ENDIAN_BIG; |
1ba607ad AC |
715 | } |
716 | ||
7a107747 | 717 | info.byte_order = default_byte_order; |
9d4fde75 | 718 | info.byte_order_for_code = info.byte_order; |
7a107747 | 719 | |
d90cf509 AC |
720 | if (! gdbarch_update_p (info)) |
721 | internal_error (__FILE__, __LINE__, | |
edefbb7c AC |
722 | _("initialize_current_architecture: Selection of " |
723 | "initial architecture failed")); | |
b4a20239 | 724 | |
1ba607ad | 725 | /* Create the ``set architecture'' command appending ``auto'' to the |
0e2de366 | 726 | list of architectures. */ |
b4a20239 | 727 | { |
0e2de366 | 728 | /* Append ``auto''. */ |
b4a20239 AC |
729 | int nr; |
730 | for (nr = 0; arches[nr] != NULL; nr++); | |
224c3ddb | 731 | arches = XRESIZEVEC (const char *, arches, nr + 2); |
b4a20239 AC |
732 | arches[nr + 0] = "auto"; |
733 | arches[nr + 1] = NULL; | |
7ab04401 | 734 | add_setshow_enum_cmd ("architecture", class_support, |
3e43a32a MS |
735 | arches, &set_architecture_string, |
736 | _("Set architecture of target."), | |
737 | _("Show architecture of target."), NULL, | |
7ab04401 AC |
738 | set_architecture, show_architecture, |
739 | &setlist, &showlist); | |
b4a20239 | 740 | add_alias_cmd ("processor", "architecture", class_support, 1, &setlist); |
b4a20239 AC |
741 | } |
742 | } | |
743 | ||
744 | ||
fb6ecb0f AC |
745 | /* Initialize a gdbarch info to values that will be automatically |
746 | overridden. Note: Originally, this ``struct info'' was initialized | |
ce2826aa | 747 | using memset(0). Unfortunately, that ran into problems, namely |
fb6ecb0f AC |
748 | BFD_ENDIAN_BIG is zero. An explicit initialization function that |
749 | can explicitly set each field to a well defined value is used. */ | |
750 | ||
751 | void | |
752 | gdbarch_info_init (struct gdbarch_info *info) | |
753 | { | |
754 | memset (info, 0, sizeof (struct gdbarch_info)); | |
428721aa | 755 | info->byte_order = BFD_ENDIAN_UNKNOWN; |
9d4fde75 | 756 | info->byte_order_for_code = info->byte_order; |
4be87837 | 757 | info->osabi = GDB_OSABI_UNINITIALIZED; |
fb6ecb0f AC |
758 | } |
759 | ||
100bcc3f | 760 | /* Similar to init, but this time fill in the blanks. Information is |
7a107747 DJ |
761 | obtained from the global "set ..." options and explicitly |
762 | initialized INFO fields. */ | |
bf922ad9 AC |
763 | |
764 | void | |
7a107747 | 765 | gdbarch_info_fill (struct gdbarch_info *info) |
bf922ad9 AC |
766 | { |
767 | /* "(gdb) set architecture ...". */ | |
768 | if (info->bfd_arch_info == NULL | |
7a107747 DJ |
769 | && target_architecture_user) |
770 | info->bfd_arch_info = target_architecture_user; | |
424163ea | 771 | /* From the file. */ |
bf922ad9 AC |
772 | if (info->bfd_arch_info == NULL |
773 | && info->abfd != NULL | |
774 | && bfd_get_arch (info->abfd) != bfd_arch_unknown | |
775 | && bfd_get_arch (info->abfd) != bfd_arch_obscure) | |
776 | info->bfd_arch_info = bfd_get_arch_info (info->abfd); | |
23181151 DJ |
777 | /* From the target. */ |
778 | if (info->target_desc != NULL) | |
779 | info->bfd_arch_info = choose_architecture_for_target | |
e35359c5 | 780 | (info->target_desc, info->bfd_arch_info); |
7a107747 DJ |
781 | /* From the default. */ |
782 | if (info->bfd_arch_info == NULL) | |
783 | info->bfd_arch_info = default_bfd_arch; | |
bf922ad9 AC |
784 | |
785 | /* "(gdb) set byte-order ...". */ | |
786 | if (info->byte_order == BFD_ENDIAN_UNKNOWN | |
7a107747 DJ |
787 | && target_byte_order_user != BFD_ENDIAN_UNKNOWN) |
788 | info->byte_order = target_byte_order_user; | |
bf922ad9 AC |
789 | /* From the INFO struct. */ |
790 | if (info->byte_order == BFD_ENDIAN_UNKNOWN | |
791 | && info->abfd != NULL) | |
792 | info->byte_order = (bfd_big_endian (info->abfd) ? BFD_ENDIAN_BIG | |
7a107747 DJ |
793 | : bfd_little_endian (info->abfd) ? BFD_ENDIAN_LITTLE |
794 | : BFD_ENDIAN_UNKNOWN); | |
795 | /* From the default. */ | |
796 | if (info->byte_order == BFD_ENDIAN_UNKNOWN) | |
797 | info->byte_order = default_byte_order; | |
9d4fde75 | 798 | info->byte_order_for_code = info->byte_order; |
bf922ad9 AC |
799 | |
800 | /* "(gdb) set osabi ...". Handled by gdbarch_lookup_osabi. */ | |
08d16641 | 801 | /* From the manual override, or from file. */ |
bf922ad9 AC |
802 | if (info->osabi == GDB_OSABI_UNINITIALIZED) |
803 | info->osabi = gdbarch_lookup_osabi (info->abfd); | |
08d16641 PA |
804 | /* From the target. */ |
805 | if (info->osabi == GDB_OSABI_UNKNOWN && info->target_desc != NULL) | |
806 | info->osabi = tdesc_osabi (info->target_desc); | |
807 | /* From the configured default. */ | |
f4290e2a | 808 | #ifdef GDB_OSABI_DEFAULT |
08d16641 PA |
809 | if (info->osabi == GDB_OSABI_UNKNOWN) |
810 | info->osabi = GDB_OSABI_DEFAULT; | |
f4290e2a | 811 | #endif |
bf922ad9 AC |
812 | |
813 | /* Must have at least filled in the architecture. */ | |
814 | gdb_assert (info->bfd_arch_info != NULL); | |
815 | } | |
816 | ||
0e2de366 MS |
817 | /* Return "current" architecture. If the target is running, this is |
818 | the architecture of the selected frame. Otherwise, the "current" | |
819 | architecture defaults to the target architecture. | |
e17c207e | 820 | |
0e2de366 MS |
821 | This function should normally be called solely by the command |
822 | interpreter routines to determine the architecture to execute a | |
823 | command in. */ | |
e17c207e UW |
824 | struct gdbarch * |
825 | get_current_arch (void) | |
826 | { | |
827 | if (has_stack_frames ()) | |
828 | return get_frame_arch (get_selected_frame (NULL)); | |
829 | else | |
f5656ead | 830 | return target_gdbarch (); |
e17c207e UW |
831 | } |
832 | ||
6c95b8df PA |
833 | int |
834 | default_has_shared_address_space (struct gdbarch *gdbarch) | |
835 | { | |
836 | /* Simply say no. In most unix-like targets each inferior/process | |
837 | has its own address space. */ | |
838 | return 0; | |
839 | } | |
840 | ||
7a697b8d | 841 | int |
6b940e6a PL |
842 | default_fast_tracepoint_valid_at (struct gdbarch *gdbarch, CORE_ADDR addr, |
843 | char **msg) | |
7a697b8d SS |
844 | { |
845 | /* We don't know if maybe the target has some way to do fast | |
846 | tracepoints that doesn't need gdbarch, so always say yes. */ | |
847 | if (msg) | |
848 | *msg = NULL; | |
849 | return 1; | |
850 | } | |
851 | ||
22f13eb8 YQ |
852 | const gdb_byte * |
853 | default_breakpoint_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr, | |
854 | int *lenptr) | |
855 | { | |
856 | int kind = gdbarch_breakpoint_kind_from_pc (gdbarch, pcptr); | |
857 | ||
858 | return gdbarch_sw_breakpoint_from_kind (gdbarch, kind, lenptr); | |
859 | } | |
833b7ab5 YQ |
860 | int |
861 | default_breakpoint_kind_from_current_state (struct gdbarch *gdbarch, | |
862 | struct regcache *regcache, | |
863 | CORE_ADDR *pcptr) | |
864 | { | |
865 | return gdbarch_breakpoint_kind_from_pc (gdbarch, pcptr); | |
866 | } | |
867 | ||
22f13eb8 | 868 | |
6710bf39 SS |
869 | void |
870 | default_gen_return_address (struct gdbarch *gdbarch, | |
871 | struct agent_expr *ax, struct axs_value *value, | |
872 | CORE_ADDR scope) | |
873 | { | |
874 | error (_("This architecture has no method to collect a return address.")); | |
875 | } | |
876 | ||
18648a37 YQ |
877 | int |
878 | default_return_in_first_hidden_param_p (struct gdbarch *gdbarch, | |
879 | struct type *type) | |
880 | { | |
881 | /* Usually, the return value's address is stored the in the "first hidden" | |
882 | parameter if the return value should be passed by reference, as | |
883 | specified in ABI. */ | |
884 | return language_pass_by_reference (type); | |
885 | } | |
886 | ||
c2170eef MM |
887 | int default_insn_is_call (struct gdbarch *gdbarch, CORE_ADDR addr) |
888 | { | |
889 | return 0; | |
890 | } | |
891 | ||
892 | int default_insn_is_ret (struct gdbarch *gdbarch, CORE_ADDR addr) | |
893 | { | |
894 | return 0; | |
895 | } | |
896 | ||
897 | int default_insn_is_jump (struct gdbarch *gdbarch, CORE_ADDR addr) | |
898 | { | |
899 | return 0; | |
900 | } | |
901 | ||
ae9bb220 PA |
902 | void |
903 | default_skip_permanent_breakpoint (struct regcache *regcache) | |
904 | { | |
905 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
906 | CORE_ADDR current_pc = regcache_read_pc (regcache); | |
ae9bb220 PA |
907 | int bp_len; |
908 | ||
ac298888 | 909 | gdbarch_breakpoint_from_pc (gdbarch, ¤t_pc, &bp_len); |
ae9bb220 PA |
910 | current_pc += bp_len; |
911 | regcache_write_pc (regcache, current_pc); | |
912 | } | |
c0e8c252 | 913 | |
f208eee0 JK |
914 | CORE_ADDR |
915 | default_infcall_mmap (CORE_ADDR size, unsigned prot) | |
916 | { | |
917 | error (_("This target does not support inferior memory allocation by mmap.")); | |
918 | } | |
919 | ||
7f361056 JK |
920 | void |
921 | default_infcall_munmap (CORE_ADDR addr, CORE_ADDR size) | |
922 | { | |
923 | /* Memory reserved by inferior mmap is kept leaked. */ | |
924 | } | |
925 | ||
f208eee0 JK |
926 | /* -mcmodel=large is used so that no GOT (Global Offset Table) is needed to be |
927 | created in inferior memory by GDB (normally it is set by ld.so). */ | |
928 | ||
929 | char * | |
930 | default_gcc_target_options (struct gdbarch *gdbarch) | |
931 | { | |
932 | return xstrprintf ("-m%d%s", gdbarch_ptr_bit (gdbarch), | |
933 | gdbarch_ptr_bit (gdbarch) == 64 ? " -mcmodel=large" : ""); | |
934 | } | |
935 | ||
ac04f72b TT |
936 | /* gdbarch gnu_triplet_regexp method. */ |
937 | ||
938 | const char * | |
939 | default_gnu_triplet_regexp (struct gdbarch *gdbarch) | |
940 | { | |
941 | return gdbarch_bfd_arch_info (gdbarch)->arch_name; | |
942 | } | |
943 | ||
3374165f SM |
944 | /* Default method for gdbarch_addressable_memory_unit_size. By default, a memory byte has |
945 | a size of 1 octet. */ | |
946 | ||
947 | int | |
948 | default_addressable_memory_unit_size (struct gdbarch *gdbarch) | |
949 | { | |
950 | return 1; | |
951 | } | |
952 | ||
5f034a78 MK |
953 | void |
954 | default_guess_tracepoint_registers (struct gdbarch *gdbarch, | |
955 | struct regcache *regcache, | |
956 | CORE_ADDR addr) | |
957 | { | |
958 | int pc_regno = gdbarch_pc_regnum (gdbarch); | |
959 | gdb_byte *regs; | |
960 | ||
961 | /* This guessing code below only works if the PC register isn't | |
962 | a pseudo-register. The value of a pseudo-register isn't stored | |
963 | in the (non-readonly) regcache -- instead it's recomputed | |
964 | (probably from some other cached raw register) whenever the | |
965 | register is read. In this case, a custom method implementation | |
966 | should be used by the architecture. */ | |
967 | if (pc_regno < 0 || pc_regno >= gdbarch_num_regs (gdbarch)) | |
968 | return; | |
969 | ||
970 | regs = (gdb_byte *) alloca (register_size (gdbarch, pc_regno)); | |
971 | store_unsigned_integer (regs, register_size (gdbarch, pc_regno), | |
972 | gdbarch_byte_order (gdbarch), addr); | |
973 | regcache_raw_supply (regcache, pc_regno, regs); | |
974 | } | |
975 | ||
3e43a32a MS |
976 | /* -Wmissing-prototypes */ |
977 | extern initialize_file_ftype _initialize_gdbarch_utils; | |
c0e8c252 AC |
978 | |
979 | void | |
b4a20239 | 980 | _initialize_gdbarch_utils (void) |
c0e8c252 | 981 | { |
7ab04401 | 982 | add_setshow_enum_cmd ("endian", class_support, |
3e43a32a MS |
983 | endian_enum, &set_endian_string, |
984 | _("Set endianness of target."), | |
985 | _("Show endianness of target."), | |
986 | NULL, set_endian, show_endian, | |
7ab04401 | 987 | &setlist, &showlist); |
c0e8c252 | 988 | } |