Commit | Line | Data |
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c0e8c252 | 1 | /* Dynamic architecture support for GDB, the GNU debugger. |
b6ba6518 | 2 | Copyright 1998, 1999, 2000, 2001 Free Software Foundation, Inc. |
c0e8c252 AC |
3 | |
4 | This file is part of GDB. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 59 Temple Place - Suite 330, | |
19 | Boston, MA 02111-1307, USA. */ | |
20 | ||
21 | #include "defs.h" | |
22 | ||
23 | #if GDB_MULTI_ARCH | |
24 | #include "gdbcmd.h" | |
25 | #include "inferior.h" /* enum CALL_DUMMY_LOCATION et.al. */ | |
26 | #else | |
27 | /* Just include everything in sight so that the every old definition | |
28 | of macro is visible. */ | |
29 | #include "gdb_string.h" | |
c0e8c252 AC |
30 | #include "symtab.h" |
31 | #include "frame.h" | |
32 | #include "inferior.h" | |
33 | #include "breakpoint.h" | |
34 | #include "gdb_wait.h" | |
35 | #include "gdbcore.h" | |
36 | #include "gdbcmd.h" | |
37 | #include "target.h" | |
38 | #include "gdbthread.h" | |
39 | #include "annotate.h" | |
40 | #include "symfile.h" /* for overlay functions */ | |
41 | #endif | |
42 | ||
1ba607ad AC |
43 | #include "version.h" |
44 | ||
f0d4cc9e AC |
45 | #include "floatformat.h" |
46 | ||
c0e8c252 AC |
47 | /* Convenience macro for allocting typesafe memory. */ |
48 | ||
49 | #ifndef XMALLOC | |
50 | #define XMALLOC(TYPE) (TYPE*) xmalloc (sizeof (TYPE)) | |
51 | #endif | |
52 | ||
53 | ||
54 | /* Use the program counter to determine the contents and size | |
55 | of a breakpoint instruction. If no target-dependent macro | |
56 | BREAKPOINT_FROM_PC has been defined to implement this function, | |
57 | assume that the breakpoint doesn't depend on the PC, and | |
58 | use the values of the BIG_BREAKPOINT and LITTLE_BREAKPOINT macros. | |
59 | Return a pointer to a string of bytes that encode a breakpoint | |
60 | instruction, stores the length of the string to *lenptr, | |
61 | and optionally adjust the pc to point to the correct memory location | |
62 | for inserting the breakpoint. */ | |
63 | ||
64 | unsigned char * | |
65 | legacy_breakpoint_from_pc (CORE_ADDR * pcptr, int *lenptr) | |
66 | { | |
67 | /* {BIG_,LITTLE_}BREAKPOINT is the sequence of bytes we insert for a | |
68 | breakpoint. On some machines, breakpoints are handled by the | |
69 | target environment and we don't have to worry about them here. */ | |
70 | #ifdef BIG_BREAKPOINT | |
71 | if (TARGET_BYTE_ORDER == BIG_ENDIAN) | |
72 | { | |
73 | static unsigned char big_break_insn[] = BIG_BREAKPOINT; | |
74 | *lenptr = sizeof (big_break_insn); | |
75 | return big_break_insn; | |
76 | } | |
77 | #endif | |
78 | #ifdef LITTLE_BREAKPOINT | |
79 | if (TARGET_BYTE_ORDER != BIG_ENDIAN) | |
80 | { | |
81 | static unsigned char little_break_insn[] = LITTLE_BREAKPOINT; | |
82 | *lenptr = sizeof (little_break_insn); | |
83 | return little_break_insn; | |
84 | } | |
85 | #endif | |
86 | #ifdef BREAKPOINT | |
87 | { | |
88 | static unsigned char break_insn[] = BREAKPOINT; | |
89 | *lenptr = sizeof (break_insn); | |
90 | return break_insn; | |
91 | } | |
92 | #endif | |
93 | *lenptr = 0; | |
94 | return NULL; | |
95 | } | |
96 | ||
97 | int | |
98 | generic_frameless_function_invocation_not (struct frame_info *fi) | |
99 | { | |
100 | return 0; | |
101 | } | |
102 | ||
71a9f22e JB |
103 | int |
104 | generic_return_value_on_stack_not (struct type *type) | |
105 | { | |
106 | return 0; | |
107 | } | |
108 | ||
c0e8c252 AC |
109 | char * |
110 | legacy_register_name (int i) | |
111 | { | |
112 | #ifdef REGISTER_NAMES | |
113 | static char *names[] = REGISTER_NAMES; | |
114 | if (i < 0 || i >= (sizeof (names) / sizeof (*names))) | |
115 | return NULL; | |
116 | else | |
117 | return names[i]; | |
118 | #else | |
8e65ff28 AC |
119 | internal_error (__FILE__, __LINE__, |
120 | "legacy_register_name: called."); | |
c0e8c252 AC |
121 | return NULL; |
122 | #endif | |
123 | } | |
124 | ||
125 | #if defined (CALL_DUMMY) | |
126 | LONGEST legacy_call_dummy_words[] = CALL_DUMMY; | |
127 | #else | |
128 | LONGEST legacy_call_dummy_words[1]; | |
129 | #endif | |
130 | int legacy_sizeof_call_dummy_words = sizeof (legacy_call_dummy_words); | |
131 | ||
132 | void | |
133 | generic_remote_translate_xfer_address (CORE_ADDR gdb_addr, int gdb_len, | |
134 | CORE_ADDR * rem_addr, int *rem_len) | |
135 | { | |
136 | *rem_addr = gdb_addr; | |
137 | *rem_len = gdb_len; | |
138 | } | |
139 | ||
dad41f9a AC |
140 | int |
141 | generic_prologue_frameless_p (CORE_ADDR ip) | |
142 | { | |
143 | #ifdef SKIP_PROLOGUE_FRAMELESS_P | |
144 | return ip == SKIP_PROLOGUE_FRAMELESS_P (ip); | |
145 | #else | |
146 | return ip == SKIP_PROLOGUE (ip); | |
147 | #endif | |
148 | } | |
149 | ||
150 | ||
3339cf8b AC |
151 | /* Helper functions for INNER_THAN */ |
152 | ||
153 | int | |
fba45db2 | 154 | core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs) |
3339cf8b AC |
155 | { |
156 | return (lhs < rhs); | |
157 | } | |
158 | ||
159 | int | |
fba45db2 | 160 | core_addr_greaterthan (CORE_ADDR lhs, CORE_ADDR rhs) |
3339cf8b AC |
161 | { |
162 | return (lhs > rhs); | |
163 | } | |
164 | ||
165 | ||
f0d4cc9e AC |
166 | /* Helper functions for TARGET_{FLOAT,DOUBLE}_FORMAT */ |
167 | ||
168 | const struct floatformat * | |
169 | default_float_format (struct gdbarch *gdbarch) | |
170 | { | |
171 | #if GDB_MULTI_ARCH | |
172 | int byte_order = gdbarch_byte_order (gdbarch); | |
173 | #else | |
174 | int byte_order = TARGET_BYTE_ORDER; | |
175 | #endif | |
176 | switch (byte_order) | |
177 | { | |
178 | case BIG_ENDIAN: | |
179 | return &floatformat_ieee_single_big; | |
180 | case LITTLE_ENDIAN: | |
181 | return &floatformat_ieee_single_little; | |
182 | default: | |
8e65ff28 AC |
183 | internal_error (__FILE__, __LINE__, |
184 | "default_float_format: bad byte order"); | |
f0d4cc9e AC |
185 | } |
186 | } | |
187 | ||
188 | ||
189 | const struct floatformat * | |
190 | default_double_format (struct gdbarch *gdbarch) | |
191 | { | |
192 | #if GDB_MULTI_ARCH | |
193 | int byte_order = gdbarch_byte_order (gdbarch); | |
194 | #else | |
195 | int byte_order = TARGET_BYTE_ORDER; | |
196 | #endif | |
197 | switch (byte_order) | |
198 | { | |
199 | case BIG_ENDIAN: | |
200 | return &floatformat_ieee_double_big; | |
201 | case LITTLE_ENDIAN: | |
202 | return &floatformat_ieee_double_little; | |
203 | default: | |
8e65ff28 AC |
204 | internal_error (__FILE__, __LINE__, |
205 | "default_double_format: bad byte order"); | |
f0d4cc9e AC |
206 | } |
207 | } | |
208 | ||
193e3b1a AC |
209 | /* Misc helper functions for targets. */ |
210 | ||
211 | int | |
fba45db2 | 212 | frame_num_args_unknown (struct frame_info *fi) |
193e3b1a AC |
213 | { |
214 | return -1; | |
215 | } | |
216 | ||
217 | ||
218 | int | |
fba45db2 | 219 | generic_register_convertible_not (int num) |
193e3b1a AC |
220 | { |
221 | return 0; | |
222 | } | |
223 | ||
b4a20239 | 224 | |
7c7651b2 AC |
225 | int |
226 | default_register_sim_regno (int num) | |
227 | { | |
228 | return num; | |
229 | } | |
230 | ||
f517ea4e PS |
231 | |
232 | CORE_ADDR | |
233 | default_convert_from_func_ptr_addr (CORE_ADDR addr) | |
234 | { | |
235 | return addr; | |
236 | } | |
237 | ||
88c72b7d AC |
238 | int |
239 | no_op_reg_to_regnum (int reg) | |
240 | { | |
241 | return reg; | |
242 | } | |
243 | ||
c347ee3e MS |
244 | /* For use by frame_args_address and frame_locals_address. */ |
245 | CORE_ADDR | |
246 | default_frame_address (struct frame_info *fi) | |
247 | { | |
248 | return fi->frame; | |
249 | } | |
250 | ||
b4a20239 AC |
251 | /* Functions to manipulate the endianness of the target. */ |
252 | ||
253 | #ifdef TARGET_BYTE_ORDER_SELECTABLE | |
254 | /* compat - Catch old targets that expect a selectable byte-order to | |
255 | default to BIG_ENDIAN */ | |
256 | #ifndef TARGET_BYTE_ORDER_DEFAULT | |
257 | #define TARGET_BYTE_ORDER_DEFAULT BIG_ENDIAN | |
258 | #endif | |
259 | #endif | |
260 | #if !TARGET_BYTE_ORDER_SELECTABLE_P | |
261 | #ifndef TARGET_BYTE_ORDER_DEFAULT | |
262 | /* compat - Catch old non byte-order selectable targets that do not | |
263 | define TARGET_BYTE_ORDER_DEFAULT and instead expect | |
264 | TARGET_BYTE_ORDER to be used as the default. For targets that | |
265 | defined neither TARGET_BYTE_ORDER nor TARGET_BYTE_ORDER_DEFAULT the | |
266 | below will get a strange compiler warning. */ | |
267 | #define TARGET_BYTE_ORDER_DEFAULT TARGET_BYTE_ORDER | |
268 | #endif | |
269 | #endif | |
270 | #ifndef TARGET_BYTE_ORDER_DEFAULT | |
271 | #define TARGET_BYTE_ORDER_DEFAULT BIG_ENDIAN /* arbitrary */ | |
272 | #endif | |
1ba607ad AC |
273 | /* ``target_byte_order'' is only used when non- multi-arch. |
274 | Multi-arch targets obtain the current byte order using | |
275 | TARGET_BYTE_ORDER which is controlled by gdbarch.*. */ | |
b4a20239 AC |
276 | int target_byte_order = TARGET_BYTE_ORDER_DEFAULT; |
277 | int target_byte_order_auto = 1; | |
278 | ||
53904c9e AC |
279 | static const char endian_big[] = "big"; |
280 | static const char endian_little[] = "little"; | |
281 | static const char endian_auto[] = "auto"; | |
282 | static const char *endian_enum[] = | |
b4a20239 AC |
283 | { |
284 | endian_big, | |
285 | endian_little, | |
286 | endian_auto, | |
287 | NULL, | |
288 | }; | |
53904c9e | 289 | static const char *set_endian_string; |
b4a20239 AC |
290 | |
291 | /* Called by ``show endian''. */ | |
292 | ||
293 | static void | |
294 | show_endian (char *args, int from_tty) | |
295 | { | |
296 | if (TARGET_BYTE_ORDER_AUTO) | |
297 | printf_unfiltered ("The target endianness is set automatically (currently %s endian)\n", | |
298 | (TARGET_BYTE_ORDER == BIG_ENDIAN ? "big" : "little")); | |
299 | else | |
300 | printf_unfiltered ("The target is assumed to be %s endian\n", | |
301 | (TARGET_BYTE_ORDER == BIG_ENDIAN ? "big" : "little")); | |
302 | } | |
303 | ||
304 | static void | |
305 | set_endian (char *ignore_args, int from_tty, struct cmd_list_element *c) | |
306 | { | |
307 | if (!TARGET_BYTE_ORDER_SELECTABLE_P) | |
308 | { | |
309 | printf_unfiltered ("Byte order is not selectable."); | |
310 | } | |
311 | else if (set_endian_string == endian_auto) | |
312 | { | |
313 | target_byte_order_auto = 1; | |
314 | } | |
315 | else if (set_endian_string == endian_little) | |
316 | { | |
b4a20239 AC |
317 | target_byte_order_auto = 0; |
318 | if (GDB_MULTI_ARCH) | |
319 | { | |
320 | struct gdbarch_info info; | |
321 | memset (&info, 0, sizeof info); | |
322 | info.byte_order = LITTLE_ENDIAN; | |
16f33e29 AC |
323 | if (! gdbarch_update_p (info)) |
324 | { | |
325 | printf_unfiltered ("Little endian target not supported by GDB\n"); | |
326 | } | |
b4a20239 | 327 | } |
1ba607ad AC |
328 | else |
329 | { | |
330 | target_byte_order = LITTLE_ENDIAN; | |
331 | } | |
b4a20239 AC |
332 | } |
333 | else if (set_endian_string == endian_big) | |
334 | { | |
b4a20239 AC |
335 | target_byte_order_auto = 0; |
336 | if (GDB_MULTI_ARCH) | |
337 | { | |
338 | struct gdbarch_info info; | |
339 | memset (&info, 0, sizeof info); | |
340 | info.byte_order = BIG_ENDIAN; | |
16f33e29 AC |
341 | if (! gdbarch_update_p (info)) |
342 | { | |
343 | printf_unfiltered ("Big endian target not supported by GDB\n"); | |
344 | } | |
b4a20239 | 345 | } |
1ba607ad AC |
346 | else |
347 | { | |
348 | target_byte_order = BIG_ENDIAN; | |
349 | } | |
b4a20239 AC |
350 | } |
351 | else | |
8e65ff28 AC |
352 | internal_error (__FILE__, __LINE__, |
353 | "set_endian: bad value"); | |
b4a20239 AC |
354 | show_endian (NULL, from_tty); |
355 | } | |
356 | ||
357 | /* Set the endianness from a BFD. */ | |
358 | ||
359 | static void | |
360 | set_endian_from_file (bfd *abfd) | |
361 | { | |
1ba607ad | 362 | if (GDB_MULTI_ARCH) |
8e65ff28 AC |
363 | internal_error (__FILE__, __LINE__, |
364 | "set_endian_from_file: not for multi-arch"); | |
b4a20239 AC |
365 | if (TARGET_BYTE_ORDER_SELECTABLE_P) |
366 | { | |
367 | int want; | |
368 | ||
369 | if (bfd_big_endian (abfd)) | |
370 | want = BIG_ENDIAN; | |
371 | else | |
372 | want = LITTLE_ENDIAN; | |
373 | if (TARGET_BYTE_ORDER_AUTO) | |
374 | target_byte_order = want; | |
375 | else if (TARGET_BYTE_ORDER != want) | |
376 | warning ("%s endian file does not match %s endian target.", | |
377 | want == BIG_ENDIAN ? "big" : "little", | |
378 | TARGET_BYTE_ORDER == BIG_ENDIAN ? "big" : "little"); | |
379 | } | |
380 | else | |
381 | { | |
382 | if (bfd_big_endian (abfd) | |
383 | ? TARGET_BYTE_ORDER != BIG_ENDIAN | |
384 | : TARGET_BYTE_ORDER == BIG_ENDIAN) | |
385 | warning ("%s endian file does not match %s endian target.", | |
386 | bfd_big_endian (abfd) ? "big" : "little", | |
387 | TARGET_BYTE_ORDER == BIG_ENDIAN ? "big" : "little"); | |
388 | } | |
389 | } | |
390 | ||
391 | ||
392 | /* Functions to manipulate the architecture of the target */ | |
393 | ||
394 | enum set_arch { set_arch_auto, set_arch_manual }; | |
395 | ||
396 | int target_architecture_auto = 1; | |
397 | ||
53904c9e | 398 | const char *set_architecture_string; |
b4a20239 AC |
399 | |
400 | /* Old way of changing the current architecture. */ | |
401 | ||
402 | extern const struct bfd_arch_info bfd_default_arch_struct; | |
403 | const struct bfd_arch_info *target_architecture = &bfd_default_arch_struct; | |
404 | int (*target_architecture_hook) (const struct bfd_arch_info *ap); | |
405 | ||
406 | static int | |
407 | arch_ok (const struct bfd_arch_info *arch) | |
408 | { | |
409 | if (GDB_MULTI_ARCH) | |
8e65ff28 AC |
410 | internal_error (__FILE__, __LINE__, |
411 | "arch_ok: not multi-arched"); | |
b4a20239 AC |
412 | /* Should be performing the more basic check that the binary is |
413 | compatible with GDB. */ | |
414 | /* Check with the target that the architecture is valid. */ | |
415 | return (target_architecture_hook == NULL | |
416 | || target_architecture_hook (arch)); | |
417 | } | |
418 | ||
419 | static void | |
420 | set_arch (const struct bfd_arch_info *arch, | |
421 | enum set_arch type) | |
422 | { | |
423 | if (GDB_MULTI_ARCH) | |
8e65ff28 AC |
424 | internal_error (__FILE__, __LINE__, |
425 | "set_arch: not multi-arched"); | |
b4a20239 AC |
426 | switch (type) |
427 | { | |
428 | case set_arch_auto: | |
429 | if (!arch_ok (arch)) | |
430 | warning ("Target may not support %s architecture", | |
431 | arch->printable_name); | |
432 | target_architecture = arch; | |
433 | break; | |
434 | case set_arch_manual: | |
435 | if (!arch_ok (arch)) | |
436 | { | |
437 | printf_unfiltered ("Target does not support `%s' architecture.\n", | |
438 | arch->printable_name); | |
439 | } | |
440 | else | |
441 | { | |
442 | target_architecture_auto = 0; | |
443 | target_architecture = arch; | |
444 | } | |
445 | break; | |
446 | } | |
447 | if (gdbarch_debug) | |
4b9b3959 | 448 | gdbarch_dump (current_gdbarch, gdb_stdlog); |
b4a20239 AC |
449 | } |
450 | ||
451 | /* Set the architecture from arch/machine (deprecated) */ | |
452 | ||
453 | void | |
454 | set_architecture_from_arch_mach (enum bfd_architecture arch, | |
455 | unsigned long mach) | |
456 | { | |
457 | const struct bfd_arch_info *wanted = bfd_lookup_arch (arch, mach); | |
458 | if (GDB_MULTI_ARCH) | |
8e65ff28 AC |
459 | internal_error (__FILE__, __LINE__, |
460 | "set_architecture_from_arch_mach: not multi-arched"); | |
b4a20239 AC |
461 | if (wanted != NULL) |
462 | set_arch (wanted, set_arch_manual); | |
463 | else | |
8e65ff28 AC |
464 | internal_error (__FILE__, __LINE__, |
465 | "gdbarch: hardwired architecture/machine not recognized"); | |
b4a20239 AC |
466 | } |
467 | ||
468 | /* Set the architecture from a BFD (deprecated) */ | |
469 | ||
470 | static void | |
471 | set_architecture_from_file (bfd *abfd) | |
472 | { | |
473 | const struct bfd_arch_info *wanted = bfd_get_arch_info (abfd); | |
474 | if (GDB_MULTI_ARCH) | |
8e65ff28 AC |
475 | internal_error (__FILE__, __LINE__, |
476 | "set_architecture_from_file: not multi-arched"); | |
b4a20239 AC |
477 | if (target_architecture_auto) |
478 | { | |
479 | set_arch (wanted, set_arch_auto); | |
480 | } | |
481 | else if (wanted != target_architecture) | |
482 | { | |
483 | warning ("%s architecture file may be incompatible with %s target.", | |
484 | wanted->printable_name, | |
485 | target_architecture->printable_name); | |
486 | } | |
487 | } | |
488 | ||
489 | ||
490 | /* Called if the user enters ``show architecture'' without an | |
491 | argument. */ | |
492 | ||
493 | static void | |
494 | show_architecture (char *args, int from_tty) | |
495 | { | |
496 | const char *arch; | |
497 | arch = TARGET_ARCHITECTURE->printable_name; | |
498 | if (target_architecture_auto) | |
499 | printf_filtered ("The target architecture is set automatically (currently %s)\n", arch); | |
500 | else | |
501 | printf_filtered ("The target architecture is assumed to be %s\n", arch); | |
502 | } | |
503 | ||
504 | ||
505 | /* Called if the user enters ``set architecture'' with or without an | |
506 | argument. */ | |
507 | ||
508 | static void | |
509 | set_architecture (char *ignore_args, int from_tty, struct cmd_list_element *c) | |
510 | { | |
511 | if (strcmp (set_architecture_string, "auto") == 0) | |
512 | { | |
513 | target_architecture_auto = 1; | |
514 | } | |
515 | else if (GDB_MULTI_ARCH) | |
516 | { | |
517 | struct gdbarch_info info; | |
518 | memset (&info, 0, sizeof info); | |
519 | info.bfd_arch_info = bfd_scan_arch (set_architecture_string); | |
520 | if (info.bfd_arch_info == NULL) | |
8e65ff28 AC |
521 | internal_error (__FILE__, __LINE__, |
522 | "set_architecture: bfd_scan_arch failed"); | |
16f33e29 | 523 | if (gdbarch_update_p (info)) |
b4a20239 AC |
524 | target_architecture_auto = 0; |
525 | else | |
ec3d358c | 526 | printf_unfiltered ("Architecture `%s' not recognized.\n", |
b4a20239 AC |
527 | set_architecture_string); |
528 | } | |
529 | else | |
530 | { | |
531 | const struct bfd_arch_info *arch | |
532 | = bfd_scan_arch (set_architecture_string); | |
533 | if (arch == NULL) | |
8e65ff28 AC |
534 | internal_error (__FILE__, __LINE__, |
535 | "set_architecture: bfd_scan_arch failed"); | |
b4a20239 AC |
536 | set_arch (arch, set_arch_manual); |
537 | } | |
538 | show_architecture (NULL, from_tty); | |
539 | } | |
540 | ||
541 | /* Called if the user enters ``info architecture'' without an argument. */ | |
542 | ||
543 | static void | |
544 | info_architecture (char *args, int from_tty) | |
545 | { | |
546 | printf_filtered ("Available architectures are:\n"); | |
547 | if (GDB_MULTI_ARCH) | |
548 | { | |
549 | const char **arches = gdbarch_printable_names (); | |
550 | const char **arch; | |
551 | for (arch = arches; *arch != NULL; arch++) | |
552 | { | |
553 | printf_filtered (" %s", *arch); | |
554 | } | |
b8c9b27d | 555 | xfree (arches); |
b4a20239 AC |
556 | } |
557 | else | |
558 | { | |
559 | enum bfd_architecture a; | |
560 | for (a = bfd_arch_obscure + 1; a < bfd_arch_last; a++) | |
561 | { | |
562 | const struct bfd_arch_info *ap; | |
563 | for (ap = bfd_lookup_arch (a, 0); | |
564 | ap != NULL; | |
565 | ap = ap->next) | |
566 | { | |
567 | printf_filtered (" %s", ap->printable_name); | |
568 | ap = ap->next; | |
569 | } | |
570 | } | |
571 | } | |
572 | printf_filtered ("\n"); | |
573 | } | |
574 | ||
b7d6b182 | 575 | /* Set the dynamic target-system-dependent parameters (architecture, |
b4a20239 AC |
576 | byte-order) using information found in the BFD */ |
577 | ||
578 | void | |
fba45db2 | 579 | set_gdbarch_from_file (bfd *abfd) |
b4a20239 AC |
580 | { |
581 | if (GDB_MULTI_ARCH) | |
582 | { | |
583 | struct gdbarch_info info; | |
584 | memset (&info, 0, sizeof info); | |
585 | info.abfd = abfd; | |
16f33e29 | 586 | if (! gdbarch_update_p (info)) |
ec3d358c | 587 | error ("Architecture of file not recognized.\n"); |
b4a20239 AC |
588 | } |
589 | else | |
590 | { | |
591 | set_architecture_from_file (abfd); | |
592 | set_endian_from_file (abfd); | |
593 | } | |
594 | } | |
595 | ||
596 | /* Initialize the current architecture. Update the ``set | |
597 | architecture'' command so that it specifies a list of valid | |
598 | architectures. */ | |
599 | ||
1ba607ad AC |
600 | #ifdef DEFAULT_BFD_ARCH |
601 | extern const bfd_arch_info_type DEFAULT_BFD_ARCH; | |
602 | static const bfd_arch_info_type *default_bfd_arch = &DEFAULT_BFD_ARCH; | |
603 | #else | |
4b9b3959 | 604 | static const bfd_arch_info_type *default_bfd_arch; |
1ba607ad AC |
605 | #endif |
606 | ||
607 | #ifdef DEFAULT_BFD_VEC | |
608 | extern const bfd_target DEFAULT_BFD_VEC; | |
609 | static const bfd_target *default_bfd_vec = &DEFAULT_BFD_VEC; | |
610 | #else | |
611 | static const bfd_target *default_bfd_vec; | |
612 | #endif | |
613 | ||
b4a20239 AC |
614 | void |
615 | initialize_current_architecture (void) | |
616 | { | |
617 | const char **arches = gdbarch_printable_names (); | |
b4a20239 | 618 | |
1ba607ad AC |
619 | /* determine a default architecture and byte order. */ |
620 | struct gdbarch_info info; | |
621 | memset (&info, 0, sizeof (info)); | |
622 | ||
623 | /* Find a default architecture. */ | |
624 | if (info.bfd_arch_info == NULL | |
625 | && default_bfd_arch != NULL) | |
626 | info.bfd_arch_info = default_bfd_arch; | |
627 | if (info.bfd_arch_info == NULL) | |
b4a20239 | 628 | { |
1ba607ad AC |
629 | /* Choose the architecture by taking the first one |
630 | alphabetically. */ | |
631 | const char *chosen = arches[0]; | |
b4a20239 | 632 | const char **arch; |
b4a20239 AC |
633 | for (arch = arches; *arch != NULL; arch++) |
634 | { | |
b4a20239 AC |
635 | if (strcmp (*arch, chosen) < 0) |
636 | chosen = *arch; | |
637 | } | |
638 | if (chosen == NULL) | |
8e65ff28 AC |
639 | internal_error (__FILE__, __LINE__, |
640 | "initialize_current_architecture: No arch"); | |
b4a20239 AC |
641 | info.bfd_arch_info = bfd_scan_arch (chosen); |
642 | if (info.bfd_arch_info == NULL) | |
8e65ff28 AC |
643 | internal_error (__FILE__, __LINE__, |
644 | "initialize_current_architecture: Arch not found"); | |
1ba607ad AC |
645 | } |
646 | ||
647 | /* take several guesses at a byte order. */ | |
648 | /* NB: can't use TARGET_BYTE_ORDER_DEFAULT as its definition is | |
649 | forced above. */ | |
650 | if (info.byte_order == 0 | |
651 | && default_bfd_vec != NULL) | |
652 | { | |
653 | /* Extract BFD's default vector's byte order. */ | |
654 | switch (default_bfd_vec->byteorder) | |
655 | { | |
656 | case BFD_ENDIAN_BIG: | |
657 | info.byte_order = BIG_ENDIAN; | |
658 | break; | |
659 | case BFD_ENDIAN_LITTLE: | |
660 | info.byte_order = LITTLE_ENDIAN; | |
661 | break; | |
662 | default: | |
663 | break; | |
664 | } | |
665 | } | |
666 | if (info.byte_order == 0) | |
667 | { | |
668 | /* look for ``*el-*'' in the target name. */ | |
669 | const char *chp; | |
670 | chp = strchr (target_name, '-'); | |
671 | if (chp != NULL | |
672 | && chp - 2 >= target_name | |
673 | && strncmp (chp - 2, "el", 2) == 0) | |
674 | info.byte_order = LITTLE_ENDIAN; | |
675 | } | |
676 | if (info.byte_order == 0) | |
677 | { | |
678 | /* Wire it to big-endian!!! */ | |
679 | info.byte_order = BIG_ENDIAN; | |
680 | } | |
681 | ||
682 | if (GDB_MULTI_ARCH) | |
683 | { | |
16f33e29 AC |
684 | if (! gdbarch_update_p (info)) |
685 | { | |
8e65ff28 AC |
686 | internal_error (__FILE__, __LINE__, |
687 | "initialize_current_architecture: Selection of initial architecture failed"); | |
16f33e29 | 688 | } |
b4a20239 AC |
689 | } |
690 | ||
1ba607ad AC |
691 | /* Create the ``set architecture'' command appending ``auto'' to the |
692 | list of architectures. */ | |
b4a20239 AC |
693 | { |
694 | struct cmd_list_element *c; | |
695 | /* Append ``auto''. */ | |
696 | int nr; | |
697 | for (nr = 0; arches[nr] != NULL; nr++); | |
698 | arches = xrealloc (arches, sizeof (char*) * (nr + 2)); | |
699 | arches[nr + 0] = "auto"; | |
700 | arches[nr + 1] = NULL; | |
701 | /* FIXME: add_set_enum_cmd() uses an array of ``char *'' instead | |
702 | of ``const char *''. We just happen to know that the casts are | |
703 | safe. */ | |
704 | c = add_set_enum_cmd ("architecture", class_support, | |
53904c9e | 705 | arches, &set_architecture_string, |
b4a20239 AC |
706 | "Set architecture of target.", |
707 | &setlist); | |
708 | c->function.sfunc = set_architecture; | |
709 | add_alias_cmd ("processor", "architecture", class_support, 1, &setlist); | |
710 | /* Don't use set_from_show - need to print both auto/manual and | |
711 | current setting. */ | |
712 | add_cmd ("architecture", class_support, show_architecture, | |
713 | "Show the current target architecture", &showlist); | |
714 | c = add_cmd ("architecture", class_support, info_architecture, | |
715 | "List supported target architectures", &infolist); | |
716 | deprecate_cmd (c, "set architecture"); | |
717 | } | |
718 | } | |
719 | ||
720 | ||
c0e8c252 AC |
721 | /* */ |
722 | ||
b4a20239 | 723 | extern initialize_file_ftype _initialize_gdbarch_utils; |
c0e8c252 AC |
724 | |
725 | void | |
b4a20239 | 726 | _initialize_gdbarch_utils (void) |
c0e8c252 | 727 | { |
b4a20239 AC |
728 | struct cmd_list_element *c; |
729 | c = add_set_enum_cmd ("endian", class_support, | |
730 | endian_enum, &set_endian_string, | |
731 | "Set endianness of target.", | |
732 | &setlist); | |
733 | c->function.sfunc = set_endian; | |
734 | /* Don't use set_from_show - need to print both auto/manual and | |
735 | current setting. */ | |
736 | add_cmd ("endian", class_support, show_endian, | |
737 | "Show the current byte-order", &showlist); | |
c0e8c252 | 738 | } |