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