Commit | Line | Data |
---|---|---|
c0e8c252 | 1 | /* Dynamic architecture support for GDB, the GNU debugger. |
f4f9705a | 2 | |
32d0add0 | 3 | Copyright (C) 1998-2015 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); | |
47 | gdb_byte *buf = xmalloc (len); | |
48 | ||
49 | read_memory (from, buf, len); | |
50 | write_memory (to, buf, len); | |
51 | ||
52 | if (debug_displaced) | |
53 | { | |
5af949e3 UW |
54 | fprintf_unfiltered (gdb_stdlog, "displaced: copy %s->%s: ", |
55 | paddress (gdbarch, from), paddress (gdbarch, to)); | |
237fc4c9 PA |
56 | displaced_step_dump_bytes (gdb_stdlog, buf, len); |
57 | } | |
58 | ||
59 | return (struct displaced_step_closure *) buf; | |
60 | } | |
61 | ||
62 | ||
63 | void | |
64 | simple_displaced_step_free_closure (struct gdbarch *gdbarch, | |
65 | struct displaced_step_closure *closure) | |
66 | { | |
67 | xfree (closure); | |
68 | } | |
69 | ||
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 CV |
129 | int |
130 | generic_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc) | |
131 | { | |
132 | return 0; | |
133 | } | |
134 | ||
4d1e7dd1 | 135 | /* Helper functions for gdbarch_inner_than */ |
3339cf8b AC |
136 | |
137 | int | |
fba45db2 | 138 | core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs) |
3339cf8b AC |
139 | { |
140 | return (lhs < rhs); | |
141 | } | |
142 | ||
143 | int | |
fba45db2 | 144 | core_addr_greaterthan (CORE_ADDR lhs, CORE_ADDR rhs) |
3339cf8b AC |
145 | { |
146 | return (lhs > rhs); | |
147 | } | |
148 | ||
0e2de366 | 149 | /* Misc helper functions for targets. */ |
193e3b1a | 150 | |
f517ea4e | 151 | CORE_ADDR |
24568a2c | 152 | core_addr_identity (struct gdbarch *gdbarch, CORE_ADDR addr) |
f517ea4e PS |
153 | { |
154 | return addr; | |
155 | } | |
156 | ||
e2d0e7eb AC |
157 | CORE_ADDR |
158 | convert_from_func_ptr_addr_identity (struct gdbarch *gdbarch, CORE_ADDR addr, | |
159 | struct target_ops *targ) | |
160 | { | |
161 | return addr; | |
162 | } | |
163 | ||
88c72b7d | 164 | int |
d3f73121 | 165 | no_op_reg_to_regnum (struct gdbarch *gdbarch, int reg) |
88c72b7d AC |
166 | { |
167 | return reg; | |
168 | } | |
169 | ||
a2cf933a | 170 | void |
3e29f34a | 171 | default_coff_make_msymbol_special (int val, struct minimal_symbol *msym) |
a2cf933a EZ |
172 | { |
173 | return; | |
174 | } | |
175 | ||
3e29f34a MR |
176 | /* See arch-utils.h. */ |
177 | ||
a2cf933a | 178 | void |
3e29f34a | 179 | default_make_symbol_special (struct symbol *sym, struct objfile *objfile) |
a2cf933a EZ |
180 | { |
181 | return; | |
182 | } | |
183 | ||
3e29f34a MR |
184 | /* See arch-utils.h. */ |
185 | ||
186 | CORE_ADDR | |
187 | default_adjust_dwarf2_addr (CORE_ADDR pc) | |
188 | { | |
189 | return pc; | |
190 | } | |
191 | ||
192 | /* See arch-utils.h. */ | |
193 | ||
194 | CORE_ADDR | |
195 | default_adjust_dwarf2_line (CORE_ADDR addr, int rel) | |
196 | { | |
197 | return addr; | |
198 | } | |
199 | ||
01fb7433 | 200 | int |
64a3914f | 201 | cannot_register_not (struct gdbarch *gdbarch, int regnum) |
01fb7433 AC |
202 | { |
203 | return 0; | |
204 | } | |
39d4ef09 AC |
205 | |
206 | /* Legacy version of target_virtual_frame_pointer(). Assumes that | |
0e2de366 MS |
207 | there is an gdbarch_deprecated_fp_regnum and that it is the same, |
208 | cooked or raw. */ | |
39d4ef09 AC |
209 | |
210 | void | |
a54fba4c MD |
211 | legacy_virtual_frame_pointer (struct gdbarch *gdbarch, |
212 | CORE_ADDR pc, | |
39d4ef09 AC |
213 | int *frame_regnum, |
214 | LONGEST *frame_offset) | |
215 | { | |
20bcf01c AC |
216 | /* FIXME: cagney/2002-09-13: This code is used when identifying the |
217 | frame pointer of the current PC. It is assuming that a single | |
218 | register and an offset can determine this. I think it should | |
219 | instead generate a byte code expression as that would work better | |
220 | with things like Dwarf2's CFI. */ | |
a54fba4c MD |
221 | if (gdbarch_deprecated_fp_regnum (gdbarch) >= 0 |
222 | && gdbarch_deprecated_fp_regnum (gdbarch) | |
223 | < gdbarch_num_regs (gdbarch)) | |
224 | *frame_regnum = gdbarch_deprecated_fp_regnum (gdbarch); | |
225 | else if (gdbarch_sp_regnum (gdbarch) >= 0 | |
226 | && gdbarch_sp_regnum (gdbarch) | |
227 | < gdbarch_num_regs (gdbarch)) | |
228 | *frame_regnum = gdbarch_sp_regnum (gdbarch); | |
20bcf01c AC |
229 | else |
230 | /* Should this be an internal error? I guess so, it is reflecting | |
231 | an architectural limitation in the current design. */ | |
0e2de366 MS |
232 | internal_error (__FILE__, __LINE__, |
233 | _("No virtual frame pointer available")); | |
39d4ef09 AC |
234 | *frame_offset = 0; |
235 | } | |
46cd78fb | 236 | |
d7bd68ca | 237 | \f |
13d01224 | 238 | int |
76a8ddb9 UW |
239 | generic_convert_register_p (struct gdbarch *gdbarch, int regnum, |
240 | struct type *type) | |
13d01224 | 241 | { |
9730f241 | 242 | return 0; |
13d01224 AC |
243 | } |
244 | ||
192cb3d4 MK |
245 | int |
246 | default_stabs_argument_has_addr (struct gdbarch *gdbarch, struct type *type) | |
247 | { | |
192cb3d4 MK |
248 | return 0; |
249 | } | |
250 | ||
3ca64954 RC |
251 | int |
252 | generic_instruction_nullified (struct gdbarch *gdbarch, | |
253 | struct regcache *regcache) | |
254 | { | |
255 | return 0; | |
256 | } | |
257 | ||
123dc839 DJ |
258 | int |
259 | default_remote_register_number (struct gdbarch *gdbarch, | |
260 | int regno) | |
261 | { | |
262 | return regno; | |
263 | } | |
264 | ||
3437254d PA |
265 | /* See arch-utils.h. */ |
266 | ||
267 | int | |
268 | default_vsyscall_range (struct gdbarch *gdbarch, struct mem_range *range) | |
269 | { | |
270 | return 0; | |
271 | } | |
272 | ||
01fb7433 | 273 | \f |
b4a20239 AC |
274 | /* Functions to manipulate the endianness of the target. */ |
275 | ||
7a107747 | 276 | static int target_byte_order_user = BFD_ENDIAN_UNKNOWN; |
b4a20239 | 277 | |
53904c9e AC |
278 | static const char endian_big[] = "big"; |
279 | static const char endian_little[] = "little"; | |
280 | static const char endian_auto[] = "auto"; | |
40478521 | 281 | static const char *const endian_enum[] = |
b4a20239 AC |
282 | { |
283 | endian_big, | |
284 | endian_little, | |
285 | endian_auto, | |
286 | NULL, | |
287 | }; | |
53904c9e | 288 | static const char *set_endian_string; |
b4a20239 | 289 | |
b6d373df DJ |
290 | enum bfd_endian |
291 | selected_byte_order (void) | |
292 | { | |
e17c207e | 293 | return target_byte_order_user; |
b6d373df DJ |
294 | } |
295 | ||
b4a20239 AC |
296 | /* Called by ``show endian''. */ |
297 | ||
298 | static void | |
7ab04401 AC |
299 | show_endian (struct ui_file *file, int from_tty, struct cmd_list_element *c, |
300 | const char *value) | |
b4a20239 | 301 | { |
7b6b9e83 | 302 | if (target_byte_order_user == BFD_ENDIAN_UNKNOWN) |
e17c207e | 303 | if (gdbarch_byte_order (get_current_arch ()) == BFD_ENDIAN_BIG) |
7ab04401 AC |
304 | fprintf_unfiltered (file, _("The target endianness is set automatically " |
305 | "(currently big endian)\n")); | |
edefbb7c | 306 | else |
7ab04401 | 307 | fprintf_unfiltered (file, _("The target endianness is set automatically " |
3e43a32a | 308 | "(currently little endian)\n")); |
b4a20239 | 309 | else |
e17c207e | 310 | if (target_byte_order_user == BFD_ENDIAN_BIG) |
7ab04401 AC |
311 | fprintf_unfiltered (file, |
312 | _("The target is assumed to be big endian\n")); | |
313 | else | |
314 | fprintf_unfiltered (file, | |
315 | _("The target is assumed to be little endian\n")); | |
b4a20239 AC |
316 | } |
317 | ||
318 | static void | |
319 | set_endian (char *ignore_args, int from_tty, struct cmd_list_element *c) | |
320 | { | |
7a107747 DJ |
321 | struct gdbarch_info info; |
322 | ||
323 | gdbarch_info_init (&info); | |
324 | ||
3fd3d7d2 | 325 | if (set_endian_string == endian_auto) |
b4a20239 | 326 | { |
7a107747 DJ |
327 | target_byte_order_user = BFD_ENDIAN_UNKNOWN; |
328 | if (! gdbarch_update_p (info)) | |
329 | internal_error (__FILE__, __LINE__, | |
330 | _("set_endian: architecture update failed")); | |
b4a20239 AC |
331 | } |
332 | else if (set_endian_string == endian_little) | |
333 | { | |
d90cf509 AC |
334 | info.byte_order = BFD_ENDIAN_LITTLE; |
335 | if (! gdbarch_update_p (info)) | |
edefbb7c | 336 | printf_unfiltered (_("Little endian target not supported by GDB\n")); |
7a107747 DJ |
337 | else |
338 | target_byte_order_user = BFD_ENDIAN_LITTLE; | |
b4a20239 AC |
339 | } |
340 | else if (set_endian_string == endian_big) | |
341 | { | |
d90cf509 AC |
342 | info.byte_order = BFD_ENDIAN_BIG; |
343 | if (! gdbarch_update_p (info)) | |
edefbb7c | 344 | printf_unfiltered (_("Big endian target not supported by GDB\n")); |
7a107747 DJ |
345 | else |
346 | target_byte_order_user = BFD_ENDIAN_BIG; | |
b4a20239 AC |
347 | } |
348 | else | |
8e65ff28 | 349 | internal_error (__FILE__, __LINE__, |
edefbb7c | 350 | _("set_endian: bad value")); |
7a107747 | 351 | |
7ab04401 | 352 | show_endian (gdb_stdout, from_tty, NULL, NULL); |
b4a20239 AC |
353 | } |
354 | ||
23181151 | 355 | /* Given SELECTED, a currently selected BFD architecture, and |
e35359c5 UW |
356 | TARGET_DESC, the current target description, return what |
357 | architecture to use. | |
358 | ||
359 | SELECTED may be NULL, in which case we return the architecture | |
360 | associated with TARGET_DESC. If SELECTED specifies a variant | |
361 | of the architecture associtated with TARGET_DESC, return the | |
362 | more specific of the two. | |
363 | ||
364 | If SELECTED is a different architecture, but it is accepted as | |
365 | compatible by the target, we can use the target architecture. | |
366 | ||
367 | If SELECTED is obviously incompatible, warn the user. */ | |
23181151 DJ |
368 | |
369 | static const struct bfd_arch_info * | |
e35359c5 UW |
370 | choose_architecture_for_target (const struct target_desc *target_desc, |
371 | const struct bfd_arch_info *selected) | |
23181151 | 372 | { |
e35359c5 | 373 | const struct bfd_arch_info *from_target = tdesc_architecture (target_desc); |
23181151 DJ |
374 | const struct bfd_arch_info *compat1, *compat2; |
375 | ||
376 | if (selected == NULL) | |
377 | return from_target; | |
378 | ||
379 | if (from_target == NULL) | |
380 | return selected; | |
381 | ||
382 | /* struct bfd_arch_info objects are singletons: that is, there's | |
383 | supposed to be exactly one instance for a given machine. So you | |
384 | can tell whether two are equivalent by comparing pointers. */ | |
385 | if (from_target == selected) | |
386 | return selected; | |
387 | ||
388 | /* BFD's 'A->compatible (A, B)' functions return zero if A and B are | |
389 | incompatible. But if they are compatible, it returns the 'more | |
390 | featureful' of the two arches. That is, if A can run code | |
391 | written for B, but B can't run code written for A, then it'll | |
392 | return A. | |
393 | ||
394 | Some targets (e.g. MIPS as of 2006-12-04) don't fully | |
395 | implement this, instead always returning NULL or the first | |
396 | argument. We detect that case by checking both directions. */ | |
397 | ||
398 | compat1 = selected->compatible (selected, from_target); | |
399 | compat2 = from_target->compatible (from_target, selected); | |
400 | ||
401 | if (compat1 == NULL && compat2 == NULL) | |
402 | { | |
0e2de366 MS |
403 | /* BFD considers the architectures incompatible. Check our |
404 | target description whether it accepts SELECTED as compatible | |
405 | anyway. */ | |
e35359c5 UW |
406 | if (tdesc_compatible_p (target_desc, selected)) |
407 | return from_target; | |
408 | ||
23181151 DJ |
409 | warning (_("Selected architecture %s is not compatible " |
410 | "with reported target architecture %s"), | |
411 | selected->printable_name, from_target->printable_name); | |
412 | return selected; | |
413 | } | |
414 | ||
415 | if (compat1 == NULL) | |
416 | return compat2; | |
417 | if (compat2 == NULL) | |
418 | return compat1; | |
419 | if (compat1 == compat2) | |
420 | return compat1; | |
421 | ||
0e2de366 MS |
422 | /* If the two didn't match, but one of them was a default |
423 | architecture, assume the more specific one is correct. This | |
424 | handles the case where an executable or target description just | |
425 | says "mips", but the other knows which MIPS variant. */ | |
23181151 DJ |
426 | if (compat1->the_default) |
427 | return compat2; | |
428 | if (compat2->the_default) | |
429 | return compat1; | |
430 | ||
431 | /* We have no idea which one is better. This is a bug, but not | |
432 | a critical problem; warn the user. */ | |
433 | warning (_("Selected architecture %s is ambiguous with " | |
434 | "reported target architecture %s"), | |
435 | selected->printable_name, from_target->printable_name); | |
436 | return selected; | |
437 | } | |
438 | ||
0e2de366 | 439 | /* Functions to manipulate the architecture of the target. */ |
b4a20239 AC |
440 | |
441 | enum set_arch { set_arch_auto, set_arch_manual }; | |
442 | ||
7a107747 | 443 | static const struct bfd_arch_info *target_architecture_user; |
b4a20239 | 444 | |
a8cf2722 AC |
445 | static const char *set_architecture_string; |
446 | ||
447 | const char * | |
448 | selected_architecture_name (void) | |
449 | { | |
7a107747 | 450 | if (target_architecture_user == NULL) |
a8cf2722 AC |
451 | return NULL; |
452 | else | |
453 | return set_architecture_string; | |
454 | } | |
b4a20239 | 455 | |
b4a20239 | 456 | /* Called if the user enters ``show architecture'' without an |
0e2de366 | 457 | argument. */ |
b4a20239 AC |
458 | |
459 | static void | |
7ab04401 AC |
460 | show_architecture (struct ui_file *file, int from_tty, |
461 | struct cmd_list_element *c, const char *value) | |
b4a20239 | 462 | { |
7a107747 | 463 | if (target_architecture_user == NULL) |
3e43a32a MS |
464 | fprintf_filtered (file, _("The target architecture is set " |
465 | "automatically (currently %s)\n"), | |
466 | gdbarch_bfd_arch_info (get_current_arch ())->printable_name); | |
b4a20239 | 467 | else |
3e43a32a MS |
468 | fprintf_filtered (file, _("The target architecture is assumed to be %s\n"), |
469 | set_architecture_string); | |
b4a20239 AC |
470 | } |
471 | ||
472 | ||
473 | /* Called if the user enters ``set architecture'' with or without an | |
0e2de366 | 474 | argument. */ |
b4a20239 AC |
475 | |
476 | static void | |
477 | set_architecture (char *ignore_args, int from_tty, struct cmd_list_element *c) | |
478 | { | |
7a107747 DJ |
479 | struct gdbarch_info info; |
480 | ||
481 | gdbarch_info_init (&info); | |
482 | ||
b4a20239 AC |
483 | if (strcmp (set_architecture_string, "auto") == 0) |
484 | { | |
7a107747 DJ |
485 | target_architecture_user = NULL; |
486 | if (!gdbarch_update_p (info)) | |
487 | internal_error (__FILE__, __LINE__, | |
488 | _("could not select an architecture automatically")); | |
b4a20239 | 489 | } |
d90cf509 | 490 | else |
b4a20239 | 491 | { |
b4a20239 AC |
492 | info.bfd_arch_info = bfd_scan_arch (set_architecture_string); |
493 | if (info.bfd_arch_info == NULL) | |
8e65ff28 | 494 | internal_error (__FILE__, __LINE__, |
edefbb7c | 495 | _("set_architecture: bfd_scan_arch failed")); |
16f33e29 | 496 | if (gdbarch_update_p (info)) |
7a107747 | 497 | target_architecture_user = info.bfd_arch_info; |
b4a20239 | 498 | else |
edefbb7c | 499 | printf_unfiltered (_("Architecture `%s' not recognized.\n"), |
b4a20239 AC |
500 | set_architecture_string); |
501 | } | |
7ab04401 | 502 | show_architecture (gdb_stdout, from_tty, NULL, NULL); |
b4a20239 AC |
503 | } |
504 | ||
ebdba546 | 505 | /* Try to select a global architecture that matches "info". Return |
0f9741f2 | 506 | non-zero if the attempt succeeds. */ |
ebdba546 AC |
507 | int |
508 | gdbarch_update_p (struct gdbarch_info info) | |
509 | { | |
a7f1256d UW |
510 | struct gdbarch *new_gdbarch; |
511 | ||
512 | /* Check for the current file. */ | |
513 | if (info.abfd == NULL) | |
514 | info.abfd = exec_bfd; | |
515 | if (info.abfd == NULL) | |
516 | info.abfd = core_bfd; | |
517 | ||
518 | /* Check for the current target description. */ | |
519 | if (info.target_desc == NULL) | |
520 | info.target_desc = target_current_description (); | |
521 | ||
522 | new_gdbarch = gdbarch_find_by_info (info); | |
ebdba546 AC |
523 | |
524 | /* If there no architecture by that name, reject the request. */ | |
525 | if (new_gdbarch == NULL) | |
526 | { | |
527 | if (gdbarch_debug) | |
528 | fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: " | |
529 | "Architecture not found\n"); | |
530 | return 0; | |
531 | } | |
532 | ||
533 | /* If it is the same old architecture, accept the request (but don't | |
534 | swap anything). */ | |
f5656ead | 535 | if (new_gdbarch == target_gdbarch ()) |
ebdba546 AC |
536 | { |
537 | if (gdbarch_debug) | |
538 | fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: " | |
e3cb3832 JB |
539 | "Architecture %s (%s) unchanged\n", |
540 | host_address_to_string (new_gdbarch), | |
ebdba546 AC |
541 | gdbarch_bfd_arch_info (new_gdbarch)->printable_name); |
542 | return 1; | |
543 | } | |
544 | ||
545 | /* It's a new architecture, swap it in. */ | |
546 | if (gdbarch_debug) | |
547 | fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: " | |
e3cb3832 JB |
548 | "New architecture %s (%s) selected\n", |
549 | host_address_to_string (new_gdbarch), | |
ebdba546 | 550 | gdbarch_bfd_arch_info (new_gdbarch)->printable_name); |
aff68abb | 551 | set_target_gdbarch (new_gdbarch); |
ebdba546 AC |
552 | |
553 | return 1; | |
554 | } | |
555 | ||
2b026650 MK |
556 | /* Return the architecture for ABFD. If no suitable architecture |
557 | could be find, return NULL. */ | |
558 | ||
559 | struct gdbarch * | |
560 | gdbarch_from_bfd (bfd *abfd) | |
b4a20239 | 561 | { |
d90cf509 AC |
562 | struct gdbarch_info info; |
563 | gdbarch_info_init (&info); | |
05c547f6 | 564 | |
d90cf509 | 565 | info.abfd = abfd; |
b60eb90d | 566 | return gdbarch_find_by_info (info); |
2b026650 MK |
567 | } |
568 | ||
569 | /* Set the dynamic target-system-dependent parameters (architecture, | |
570 | byte-order) using information found in the BFD */ | |
571 | ||
572 | void | |
573 | set_gdbarch_from_file (bfd *abfd) | |
574 | { | |
a7f1256d | 575 | struct gdbarch_info info; |
2b026650 MK |
576 | struct gdbarch *gdbarch; |
577 | ||
a7f1256d UW |
578 | gdbarch_info_init (&info); |
579 | info.abfd = abfd; | |
580 | info.target_desc = target_current_description (); | |
581 | gdbarch = gdbarch_find_by_info (info); | |
582 | ||
2b026650 | 583 | if (gdbarch == NULL) |
8a3fe4f8 | 584 | error (_("Architecture of file not recognized.")); |
aff68abb | 585 | set_target_gdbarch (gdbarch); |
b4a20239 AC |
586 | } |
587 | ||
588 | /* Initialize the current architecture. Update the ``set | |
589 | architecture'' command so that it specifies a list of valid | |
590 | architectures. */ | |
591 | ||
1ba607ad AC |
592 | #ifdef DEFAULT_BFD_ARCH |
593 | extern const bfd_arch_info_type DEFAULT_BFD_ARCH; | |
594 | static const bfd_arch_info_type *default_bfd_arch = &DEFAULT_BFD_ARCH; | |
595 | #else | |
4b9b3959 | 596 | static const bfd_arch_info_type *default_bfd_arch; |
1ba607ad AC |
597 | #endif |
598 | ||
599 | #ifdef DEFAULT_BFD_VEC | |
600 | extern const bfd_target DEFAULT_BFD_VEC; | |
601 | static const bfd_target *default_bfd_vec = &DEFAULT_BFD_VEC; | |
602 | #else | |
603 | static const bfd_target *default_bfd_vec; | |
604 | #endif | |
605 | ||
7a107747 DJ |
606 | static int default_byte_order = BFD_ENDIAN_UNKNOWN; |
607 | ||
b4a20239 AC |
608 | void |
609 | initialize_current_architecture (void) | |
610 | { | |
611 | const char **arches = gdbarch_printable_names (); | |
05c547f6 | 612 | struct gdbarch_info info; |
b4a20239 | 613 | |
0e2de366 | 614 | /* determine a default architecture and byte order. */ |
fb6ecb0f | 615 | gdbarch_info_init (&info); |
1ba607ad | 616 | |
0e2de366 | 617 | /* Find a default architecture. */ |
7a107747 | 618 | if (default_bfd_arch == NULL) |
b4a20239 | 619 | { |
1ba607ad | 620 | /* Choose the architecture by taking the first one |
0e2de366 | 621 | alphabetically. */ |
1ba607ad | 622 | const char *chosen = arches[0]; |
b4a20239 | 623 | const char **arch; |
b4a20239 AC |
624 | for (arch = arches; *arch != NULL; arch++) |
625 | { | |
b4a20239 AC |
626 | if (strcmp (*arch, chosen) < 0) |
627 | chosen = *arch; | |
628 | } | |
629 | if (chosen == NULL) | |
8e65ff28 | 630 | internal_error (__FILE__, __LINE__, |
edefbb7c | 631 | _("initialize_current_architecture: No arch")); |
7a107747 DJ |
632 | default_bfd_arch = bfd_scan_arch (chosen); |
633 | if (default_bfd_arch == NULL) | |
8e65ff28 | 634 | internal_error (__FILE__, __LINE__, |
edefbb7c | 635 | _("initialize_current_architecture: Arch not found")); |
1ba607ad AC |
636 | } |
637 | ||
7a107747 DJ |
638 | info.bfd_arch_info = default_bfd_arch; |
639 | ||
afe64c1a | 640 | /* Take several guesses at a byte order. */ |
7a107747 | 641 | if (default_byte_order == BFD_ENDIAN_UNKNOWN |
1ba607ad AC |
642 | && default_bfd_vec != NULL) |
643 | { | |
0e2de366 | 644 | /* Extract BFD's default vector's byte order. */ |
1ba607ad AC |
645 | switch (default_bfd_vec->byteorder) |
646 | { | |
647 | case BFD_ENDIAN_BIG: | |
7a107747 | 648 | default_byte_order = BFD_ENDIAN_BIG; |
1ba607ad AC |
649 | break; |
650 | case BFD_ENDIAN_LITTLE: | |
7a107747 | 651 | default_byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad AC |
652 | break; |
653 | default: | |
654 | break; | |
655 | } | |
656 | } | |
7a107747 | 657 | if (default_byte_order == BFD_ENDIAN_UNKNOWN) |
1ba607ad | 658 | { |
0e2de366 | 659 | /* look for ``*el-*'' in the target name. */ |
1ba607ad AC |
660 | const char *chp; |
661 | chp = strchr (target_name, '-'); | |
662 | if (chp != NULL | |
663 | && chp - 2 >= target_name | |
664 | && strncmp (chp - 2, "el", 2) == 0) | |
7a107747 | 665 | default_byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad | 666 | } |
7a107747 | 667 | if (default_byte_order == BFD_ENDIAN_UNKNOWN) |
1ba607ad AC |
668 | { |
669 | /* Wire it to big-endian!!! */ | |
7a107747 | 670 | default_byte_order = BFD_ENDIAN_BIG; |
1ba607ad AC |
671 | } |
672 | ||
7a107747 | 673 | info.byte_order = default_byte_order; |
9d4fde75 | 674 | info.byte_order_for_code = info.byte_order; |
7a107747 | 675 | |
d90cf509 AC |
676 | if (! gdbarch_update_p (info)) |
677 | internal_error (__FILE__, __LINE__, | |
edefbb7c AC |
678 | _("initialize_current_architecture: Selection of " |
679 | "initial architecture failed")); | |
b4a20239 | 680 | |
1ba607ad | 681 | /* Create the ``set architecture'' command appending ``auto'' to the |
0e2de366 | 682 | list of architectures. */ |
b4a20239 | 683 | { |
0e2de366 | 684 | /* Append ``auto''. */ |
b4a20239 AC |
685 | int nr; |
686 | for (nr = 0; arches[nr] != NULL; nr++); | |
687 | arches = xrealloc (arches, sizeof (char*) * (nr + 2)); | |
688 | arches[nr + 0] = "auto"; | |
689 | arches[nr + 1] = NULL; | |
7ab04401 | 690 | add_setshow_enum_cmd ("architecture", class_support, |
3e43a32a MS |
691 | arches, &set_architecture_string, |
692 | _("Set architecture of target."), | |
693 | _("Show architecture of target."), NULL, | |
7ab04401 AC |
694 | set_architecture, show_architecture, |
695 | &setlist, &showlist); | |
b4a20239 | 696 | add_alias_cmd ("processor", "architecture", class_support, 1, &setlist); |
b4a20239 AC |
697 | } |
698 | } | |
699 | ||
700 | ||
fb6ecb0f AC |
701 | /* Initialize a gdbarch info to values that will be automatically |
702 | overridden. Note: Originally, this ``struct info'' was initialized | |
ce2826aa | 703 | using memset(0). Unfortunately, that ran into problems, namely |
fb6ecb0f AC |
704 | BFD_ENDIAN_BIG is zero. An explicit initialization function that |
705 | can explicitly set each field to a well defined value is used. */ | |
706 | ||
707 | void | |
708 | gdbarch_info_init (struct gdbarch_info *info) | |
709 | { | |
710 | memset (info, 0, sizeof (struct gdbarch_info)); | |
428721aa | 711 | info->byte_order = BFD_ENDIAN_UNKNOWN; |
9d4fde75 | 712 | info->byte_order_for_code = info->byte_order; |
4be87837 | 713 | info->osabi = GDB_OSABI_UNINITIALIZED; |
fb6ecb0f AC |
714 | } |
715 | ||
100bcc3f | 716 | /* Similar to init, but this time fill in the blanks. Information is |
7a107747 DJ |
717 | obtained from the global "set ..." options and explicitly |
718 | initialized INFO fields. */ | |
bf922ad9 AC |
719 | |
720 | void | |
7a107747 | 721 | gdbarch_info_fill (struct gdbarch_info *info) |
bf922ad9 AC |
722 | { |
723 | /* "(gdb) set architecture ...". */ | |
724 | if (info->bfd_arch_info == NULL | |
7a107747 DJ |
725 | && target_architecture_user) |
726 | info->bfd_arch_info = target_architecture_user; | |
424163ea | 727 | /* From the file. */ |
bf922ad9 AC |
728 | if (info->bfd_arch_info == NULL |
729 | && info->abfd != NULL | |
730 | && bfd_get_arch (info->abfd) != bfd_arch_unknown | |
731 | && bfd_get_arch (info->abfd) != bfd_arch_obscure) | |
732 | info->bfd_arch_info = bfd_get_arch_info (info->abfd); | |
23181151 DJ |
733 | /* From the target. */ |
734 | if (info->target_desc != NULL) | |
735 | info->bfd_arch_info = choose_architecture_for_target | |
e35359c5 | 736 | (info->target_desc, info->bfd_arch_info); |
7a107747 DJ |
737 | /* From the default. */ |
738 | if (info->bfd_arch_info == NULL) | |
739 | info->bfd_arch_info = default_bfd_arch; | |
bf922ad9 AC |
740 | |
741 | /* "(gdb) set byte-order ...". */ | |
742 | if (info->byte_order == BFD_ENDIAN_UNKNOWN | |
7a107747 DJ |
743 | && target_byte_order_user != BFD_ENDIAN_UNKNOWN) |
744 | info->byte_order = target_byte_order_user; | |
bf922ad9 AC |
745 | /* From the INFO struct. */ |
746 | if (info->byte_order == BFD_ENDIAN_UNKNOWN | |
747 | && info->abfd != NULL) | |
748 | info->byte_order = (bfd_big_endian (info->abfd) ? BFD_ENDIAN_BIG | |
7a107747 DJ |
749 | : bfd_little_endian (info->abfd) ? BFD_ENDIAN_LITTLE |
750 | : BFD_ENDIAN_UNKNOWN); | |
751 | /* From the default. */ | |
752 | if (info->byte_order == BFD_ENDIAN_UNKNOWN) | |
753 | info->byte_order = default_byte_order; | |
9d4fde75 | 754 | info->byte_order_for_code = info->byte_order; |
bf922ad9 AC |
755 | |
756 | /* "(gdb) set osabi ...". Handled by gdbarch_lookup_osabi. */ | |
08d16641 | 757 | /* From the manual override, or from file. */ |
bf922ad9 AC |
758 | if (info->osabi == GDB_OSABI_UNINITIALIZED) |
759 | info->osabi = gdbarch_lookup_osabi (info->abfd); | |
08d16641 PA |
760 | /* From the target. */ |
761 | if (info->osabi == GDB_OSABI_UNKNOWN && info->target_desc != NULL) | |
762 | info->osabi = tdesc_osabi (info->target_desc); | |
763 | /* From the configured default. */ | |
f4290e2a | 764 | #ifdef GDB_OSABI_DEFAULT |
08d16641 PA |
765 | if (info->osabi == GDB_OSABI_UNKNOWN) |
766 | info->osabi = GDB_OSABI_DEFAULT; | |
f4290e2a | 767 | #endif |
bf922ad9 AC |
768 | |
769 | /* Must have at least filled in the architecture. */ | |
770 | gdb_assert (info->bfd_arch_info != NULL); | |
771 | } | |
772 | ||
0e2de366 MS |
773 | /* Return "current" architecture. If the target is running, this is |
774 | the architecture of the selected frame. Otherwise, the "current" | |
775 | architecture defaults to the target architecture. | |
e17c207e | 776 | |
0e2de366 MS |
777 | This function should normally be called solely by the command |
778 | interpreter routines to determine the architecture to execute a | |
779 | command in. */ | |
e17c207e UW |
780 | struct gdbarch * |
781 | get_current_arch (void) | |
782 | { | |
783 | if (has_stack_frames ()) | |
784 | return get_frame_arch (get_selected_frame (NULL)); | |
785 | else | |
f5656ead | 786 | return target_gdbarch (); |
e17c207e UW |
787 | } |
788 | ||
6c95b8df PA |
789 | int |
790 | default_has_shared_address_space (struct gdbarch *gdbarch) | |
791 | { | |
792 | /* Simply say no. In most unix-like targets each inferior/process | |
793 | has its own address space. */ | |
794 | return 0; | |
795 | } | |
796 | ||
7a697b8d SS |
797 | int |
798 | default_fast_tracepoint_valid_at (struct gdbarch *gdbarch, | |
799 | CORE_ADDR addr, int *isize, char **msg) | |
800 | { | |
801 | /* We don't know if maybe the target has some way to do fast | |
802 | tracepoints that doesn't need gdbarch, so always say yes. */ | |
803 | if (msg) | |
804 | *msg = NULL; | |
805 | return 1; | |
806 | } | |
807 | ||
a1dcb23a DJ |
808 | void |
809 | default_remote_breakpoint_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr, | |
810 | int *kindptr) | |
811 | { | |
812 | gdbarch_breakpoint_from_pc (gdbarch, pcptr, kindptr); | |
813 | } | |
814 | ||
6710bf39 SS |
815 | void |
816 | default_gen_return_address (struct gdbarch *gdbarch, | |
817 | struct agent_expr *ax, struct axs_value *value, | |
818 | CORE_ADDR scope) | |
819 | { | |
820 | error (_("This architecture has no method to collect a return address.")); | |
821 | } | |
822 | ||
18648a37 YQ |
823 | int |
824 | default_return_in_first_hidden_param_p (struct gdbarch *gdbarch, | |
825 | struct type *type) | |
826 | { | |
827 | /* Usually, the return value's address is stored the in the "first hidden" | |
828 | parameter if the return value should be passed by reference, as | |
829 | specified in ABI. */ | |
830 | return language_pass_by_reference (type); | |
831 | } | |
832 | ||
c2170eef MM |
833 | int default_insn_is_call (struct gdbarch *gdbarch, CORE_ADDR addr) |
834 | { | |
835 | return 0; | |
836 | } | |
837 | ||
838 | int default_insn_is_ret (struct gdbarch *gdbarch, CORE_ADDR addr) | |
839 | { | |
840 | return 0; | |
841 | } | |
842 | ||
843 | int default_insn_is_jump (struct gdbarch *gdbarch, CORE_ADDR addr) | |
844 | { | |
845 | return 0; | |
846 | } | |
847 | ||
ae9bb220 PA |
848 | void |
849 | default_skip_permanent_breakpoint (struct regcache *regcache) | |
850 | { | |
851 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
852 | CORE_ADDR current_pc = regcache_read_pc (regcache); | |
853 | const gdb_byte *bp_insn; | |
854 | int bp_len; | |
855 | ||
856 | bp_insn = gdbarch_breakpoint_from_pc (gdbarch, ¤t_pc, &bp_len); | |
857 | current_pc += bp_len; | |
858 | regcache_write_pc (regcache, current_pc); | |
859 | } | |
c0e8c252 | 860 | |
f208eee0 JK |
861 | CORE_ADDR |
862 | default_infcall_mmap (CORE_ADDR size, unsigned prot) | |
863 | { | |
864 | error (_("This target does not support inferior memory allocation by mmap.")); | |
865 | } | |
866 | ||
867 | /* -mcmodel=large is used so that no GOT (Global Offset Table) is needed to be | |
868 | created in inferior memory by GDB (normally it is set by ld.so). */ | |
869 | ||
870 | char * | |
871 | default_gcc_target_options (struct gdbarch *gdbarch) | |
872 | { | |
873 | return xstrprintf ("-m%d%s", gdbarch_ptr_bit (gdbarch), | |
874 | gdbarch_ptr_bit (gdbarch) == 64 ? " -mcmodel=large" : ""); | |
875 | } | |
876 | ||
ac04f72b TT |
877 | /* gdbarch gnu_triplet_regexp method. */ |
878 | ||
879 | const char * | |
880 | default_gnu_triplet_regexp (struct gdbarch *gdbarch) | |
881 | { | |
882 | return gdbarch_bfd_arch_info (gdbarch)->arch_name; | |
883 | } | |
884 | ||
3e43a32a MS |
885 | /* -Wmissing-prototypes */ |
886 | extern initialize_file_ftype _initialize_gdbarch_utils; | |
c0e8c252 AC |
887 | |
888 | void | |
b4a20239 | 889 | _initialize_gdbarch_utils (void) |
c0e8c252 | 890 | { |
7ab04401 | 891 | add_setshow_enum_cmd ("endian", class_support, |
3e43a32a MS |
892 | endian_enum, &set_endian_string, |
893 | _("Set endianness of target."), | |
894 | _("Show endianness of target."), | |
895 | NULL, set_endian, show_endian, | |
7ab04401 | 896 | &setlist, &showlist); |
c0e8c252 | 897 | } |