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 | |
fb6ecb0f | 24 | #include "arch-utils.h" |
c0e8c252 AC |
25 | #include "gdbcmd.h" |
26 | #include "inferior.h" /* enum CALL_DUMMY_LOCATION et.al. */ | |
27 | #else | |
28 | /* Just include everything in sight so that the every old definition | |
29 | of macro is visible. */ | |
30 | #include "gdb_string.h" | |
c0e8c252 AC |
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" | |
c0e8c252 | 39 | #include "annotate.h" |
c0e8c252 | 40 | #endif |
fbec36e2 | 41 | #include "regcache.h" |
39d4ef09 | 42 | #include "gdb_assert.h" |
c0e8c252 | 43 | |
1ba607ad AC |
44 | #include "version.h" |
45 | ||
f0d4cc9e AC |
46 | #include "floatformat.h" |
47 | ||
c0e8c252 AC |
48 | /* Use the program counter to determine the contents and size |
49 | of a breakpoint instruction. If no target-dependent macro | |
50 | BREAKPOINT_FROM_PC has been defined to implement this function, | |
51 | assume that the breakpoint doesn't depend on the PC, and | |
52 | use the values of the BIG_BREAKPOINT and LITTLE_BREAKPOINT macros. | |
53 | Return a pointer to a string of bytes that encode a breakpoint | |
54 | instruction, stores the length of the string to *lenptr, | |
55 | and optionally adjust the pc to point to the correct memory location | |
56 | for inserting the breakpoint. */ | |
57 | ||
58 | unsigned char * | |
59 | legacy_breakpoint_from_pc (CORE_ADDR * pcptr, int *lenptr) | |
60 | { | |
61 | /* {BIG_,LITTLE_}BREAKPOINT is the sequence of bytes we insert for a | |
62 | breakpoint. On some machines, breakpoints are handled by the | |
63 | target environment and we don't have to worry about them here. */ | |
64 | #ifdef BIG_BREAKPOINT | |
d7449b42 | 65 | if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) |
c0e8c252 AC |
66 | { |
67 | static unsigned char big_break_insn[] = BIG_BREAKPOINT; | |
68 | *lenptr = sizeof (big_break_insn); | |
69 | return big_break_insn; | |
70 | } | |
71 | #endif | |
72 | #ifdef LITTLE_BREAKPOINT | |
d7449b42 | 73 | if (TARGET_BYTE_ORDER != BFD_ENDIAN_BIG) |
c0e8c252 AC |
74 | { |
75 | static unsigned char little_break_insn[] = LITTLE_BREAKPOINT; | |
76 | *lenptr = sizeof (little_break_insn); | |
77 | return little_break_insn; | |
78 | } | |
79 | #endif | |
80 | #ifdef BREAKPOINT | |
81 | { | |
82 | static unsigned char break_insn[] = BREAKPOINT; | |
83 | *lenptr = sizeof (break_insn); | |
84 | return break_insn; | |
85 | } | |
86 | #endif | |
87 | *lenptr = 0; | |
88 | return NULL; | |
89 | } | |
90 | ||
91 | int | |
92 | generic_frameless_function_invocation_not (struct frame_info *fi) | |
93 | { | |
94 | return 0; | |
95 | } | |
96 | ||
71a9f22e JB |
97 | int |
98 | generic_return_value_on_stack_not (struct type *type) | |
99 | { | |
100 | return 0; | |
101 | } | |
102 | ||
bdcd319a CV |
103 | CORE_ADDR |
104 | generic_skip_trampoline_code (CORE_ADDR pc) | |
105 | { | |
106 | return 0; | |
107 | } | |
108 | ||
68e9cc94 CV |
109 | int |
110 | generic_in_solib_call_trampoline (CORE_ADDR pc, char *name) | |
111 | { | |
112 | return 0; | |
113 | } | |
114 | ||
c12260ac CV |
115 | int |
116 | generic_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc) | |
117 | { | |
118 | return 0; | |
119 | } | |
120 | ||
c0e8c252 AC |
121 | char * |
122 | legacy_register_name (int i) | |
123 | { | |
124 | #ifdef REGISTER_NAMES | |
125 | static char *names[] = REGISTER_NAMES; | |
126 | if (i < 0 || i >= (sizeof (names) / sizeof (*names))) | |
127 | return NULL; | |
128 | else | |
129 | return names[i]; | |
130 | #else | |
8e65ff28 AC |
131 | internal_error (__FILE__, __LINE__, |
132 | "legacy_register_name: called."); | |
c0e8c252 AC |
133 | return NULL; |
134 | #endif | |
135 | } | |
136 | ||
137 | #if defined (CALL_DUMMY) | |
138 | LONGEST legacy_call_dummy_words[] = CALL_DUMMY; | |
139 | #else | |
140 | LONGEST legacy_call_dummy_words[1]; | |
141 | #endif | |
142 | int legacy_sizeof_call_dummy_words = sizeof (legacy_call_dummy_words); | |
143 | ||
144 | void | |
145 | generic_remote_translate_xfer_address (CORE_ADDR gdb_addr, int gdb_len, | |
146 | CORE_ADDR * rem_addr, int *rem_len) | |
147 | { | |
148 | *rem_addr = gdb_addr; | |
149 | *rem_len = gdb_len; | |
150 | } | |
151 | ||
dad41f9a AC |
152 | int |
153 | generic_prologue_frameless_p (CORE_ADDR ip) | |
154 | { | |
155 | #ifdef SKIP_PROLOGUE_FRAMELESS_P | |
156 | return ip == SKIP_PROLOGUE_FRAMELESS_P (ip); | |
157 | #else | |
158 | return ip == SKIP_PROLOGUE (ip); | |
159 | #endif | |
160 | } | |
161 | ||
2bf0cb65 EZ |
162 | /* New/multi-arched targets should use the correct gdbarch field |
163 | instead of using this global pointer. */ | |
164 | int | |
165 | legacy_print_insn (bfd_vma vma, disassemble_info *info) | |
166 | { | |
167 | return (*tm_print_insn) (vma, info); | |
168 | } | |
dad41f9a | 169 | |
3339cf8b AC |
170 | /* Helper functions for INNER_THAN */ |
171 | ||
172 | int | |
fba45db2 | 173 | core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs) |
3339cf8b AC |
174 | { |
175 | return (lhs < rhs); | |
176 | } | |
177 | ||
178 | int | |
fba45db2 | 179 | core_addr_greaterthan (CORE_ADDR lhs, CORE_ADDR rhs) |
3339cf8b AC |
180 | { |
181 | return (lhs > rhs); | |
182 | } | |
183 | ||
184 | ||
f0d4cc9e AC |
185 | /* Helper functions for TARGET_{FLOAT,DOUBLE}_FORMAT */ |
186 | ||
187 | const struct floatformat * | |
188 | default_float_format (struct gdbarch *gdbarch) | |
189 | { | |
190 | #if GDB_MULTI_ARCH | |
191 | int byte_order = gdbarch_byte_order (gdbarch); | |
192 | #else | |
193 | int byte_order = TARGET_BYTE_ORDER; | |
194 | #endif | |
195 | switch (byte_order) | |
196 | { | |
d7449b42 | 197 | case BFD_ENDIAN_BIG: |
f0d4cc9e | 198 | return &floatformat_ieee_single_big; |
778eb05e | 199 | case BFD_ENDIAN_LITTLE: |
f0d4cc9e AC |
200 | return &floatformat_ieee_single_little; |
201 | default: | |
8e65ff28 AC |
202 | internal_error (__FILE__, __LINE__, |
203 | "default_float_format: bad byte order"); | |
f0d4cc9e AC |
204 | } |
205 | } | |
206 | ||
207 | ||
208 | const struct floatformat * | |
209 | default_double_format (struct gdbarch *gdbarch) | |
210 | { | |
211 | #if GDB_MULTI_ARCH | |
212 | int byte_order = gdbarch_byte_order (gdbarch); | |
213 | #else | |
214 | int byte_order = TARGET_BYTE_ORDER; | |
215 | #endif | |
216 | switch (byte_order) | |
217 | { | |
d7449b42 | 218 | case BFD_ENDIAN_BIG: |
f0d4cc9e | 219 | return &floatformat_ieee_double_big; |
778eb05e | 220 | case BFD_ENDIAN_LITTLE: |
f0d4cc9e AC |
221 | return &floatformat_ieee_double_little; |
222 | default: | |
8e65ff28 AC |
223 | internal_error (__FILE__, __LINE__, |
224 | "default_double_format: bad byte order"); | |
f0d4cc9e AC |
225 | } |
226 | } | |
227 | ||
193e3b1a AC |
228 | /* Misc helper functions for targets. */ |
229 | ||
230 | int | |
fba45db2 | 231 | frame_num_args_unknown (struct frame_info *fi) |
193e3b1a AC |
232 | { |
233 | return -1; | |
234 | } | |
235 | ||
236 | ||
237 | int | |
fba45db2 | 238 | generic_register_convertible_not (int num) |
193e3b1a AC |
239 | { |
240 | return 0; | |
241 | } | |
242 | ||
b4a20239 | 243 | |
c8f9d51c JB |
244 | /* Under some ABI's that specify the `struct convention' for returning |
245 | structures by value, by the time we've returned from the function, | |
246 | the return value is sitting there in the caller's buffer, but GDB | |
247 | has no way to find the address of that buffer. | |
248 | ||
249 | On such architectures, use this function as your | |
250 | extract_struct_value_address method. When asked to a struct | |
251 | returned by value in this fashion, GDB will print a nice error | |
252 | message, instead of garbage. */ | |
253 | CORE_ADDR | |
254 | generic_cannot_extract_struct_value_address (char *dummy) | |
255 | { | |
256 | return 0; | |
257 | } | |
258 | ||
7c7651b2 AC |
259 | int |
260 | default_register_sim_regno (int num) | |
261 | { | |
262 | return num; | |
263 | } | |
264 | ||
f517ea4e PS |
265 | |
266 | CORE_ADDR | |
875e1767 | 267 | core_addr_identity (CORE_ADDR addr) |
f517ea4e PS |
268 | { |
269 | return addr; | |
270 | } | |
271 | ||
88c72b7d AC |
272 | int |
273 | no_op_reg_to_regnum (int reg) | |
274 | { | |
275 | return reg; | |
276 | } | |
277 | ||
c347ee3e MS |
278 | /* For use by frame_args_address and frame_locals_address. */ |
279 | CORE_ADDR | |
280 | default_frame_address (struct frame_info *fi) | |
281 | { | |
282 | return fi->frame; | |
283 | } | |
284 | ||
e02bc4cc DS |
285 | /* Default prepare_to_procced(). */ |
286 | int | |
287 | default_prepare_to_proceed (int select_it) | |
288 | { | |
289 | return 0; | |
290 | } | |
291 | ||
292 | /* Generic prepare_to_proceed(). This one should be suitable for most | |
293 | targets that support threads. */ | |
294 | int | |
295 | generic_prepare_to_proceed (int select_it) | |
296 | { | |
39f77062 | 297 | ptid_t wait_ptid; |
e02bc4cc DS |
298 | struct target_waitstatus wait_status; |
299 | ||
300 | /* Get the last target status returned by target_wait(). */ | |
39f77062 | 301 | get_last_target_status (&wait_ptid, &wait_status); |
e02bc4cc | 302 | |
8849f47d JL |
303 | /* Make sure we were stopped either at a breakpoint, or because |
304 | of a Ctrl-C. */ | |
e02bc4cc | 305 | if (wait_status.kind != TARGET_WAITKIND_STOPPED |
8849f47d JL |
306 | || (wait_status.value.sig != TARGET_SIGNAL_TRAP && |
307 | wait_status.value.sig != TARGET_SIGNAL_INT)) | |
e02bc4cc DS |
308 | { |
309 | return 0; | |
310 | } | |
311 | ||
39f77062 KB |
312 | if (!ptid_equal (wait_ptid, minus_one_ptid) |
313 | && !ptid_equal (inferior_ptid, wait_ptid)) | |
e02bc4cc DS |
314 | { |
315 | /* Switched over from WAIT_PID. */ | |
39f77062 | 316 | CORE_ADDR wait_pc = read_pc_pid (wait_ptid); |
e02bc4cc | 317 | |
8849f47d | 318 | if (wait_pc != read_pc ()) |
e02bc4cc DS |
319 | { |
320 | if (select_it) | |
321 | { | |
8849f47d | 322 | /* Switch back to WAIT_PID thread. */ |
39f77062 | 323 | inferior_ptid = wait_ptid; |
e02bc4cc DS |
324 | |
325 | /* FIXME: This stuff came from switch_to_thread() in | |
326 | thread.c (which should probably be a public function). */ | |
327 | flush_cached_frames (); | |
328 | registers_changed (); | |
329 | stop_pc = wait_pc; | |
330 | select_frame (get_current_frame (), 0); | |
331 | } | |
8849f47d JL |
332 | /* We return 1 to indicate that there is a breakpoint here, |
333 | so we need to step over it before continuing to avoid | |
334 | hitting it straight away. */ | |
335 | if (breakpoint_here_p (wait_pc)) | |
336 | { | |
337 | return 1; | |
338 | } | |
e02bc4cc DS |
339 | } |
340 | } | |
341 | return 0; | |
342 | ||
343 | } | |
344 | ||
10312cc4 AC |
345 | void |
346 | init_frame_pc_noop (int fromleaf, struct frame_info *prev) | |
347 | { | |
348 | return; | |
349 | } | |
350 | ||
7824d2f2 AC |
351 | void |
352 | init_frame_pc_default (int fromleaf, struct frame_info *prev) | |
353 | { | |
354 | if (fromleaf) | |
355 | prev->pc = SAVED_PC_AFTER_CALL (prev->next); | |
356 | else if (prev->next != NULL) | |
357 | prev->pc = FRAME_SAVED_PC (prev->next); | |
358 | else | |
359 | prev->pc = read_pc (); | |
360 | } | |
361 | ||
01fb7433 AC |
362 | int |
363 | cannot_register_not (int regnum) | |
364 | { | |
365 | return 0; | |
366 | } | |
39d4ef09 AC |
367 | |
368 | /* Legacy version of target_virtual_frame_pointer(). Assumes that | |
369 | there is an FP_REGNUM and that it is the same, cooked or raw. */ | |
370 | ||
371 | void | |
372 | legacy_virtual_frame_pointer (CORE_ADDR pc, | |
373 | int *frame_regnum, | |
374 | LONGEST *frame_offset) | |
375 | { | |
376 | gdb_assert (FP_REGNUM >= 0); | |
377 | *frame_regnum = FP_REGNUM; | |
378 | *frame_offset = 0; | |
379 | } | |
46cd78fb AC |
380 | |
381 | /* Assume the world is flat. Every register is large enough to fit a | |
382 | target integer. */ | |
383 | ||
384 | int | |
385 | generic_register_raw_size (int regnum) | |
386 | { | |
387 | gdb_assert (regnum >= 0 && regnum < NUM_REGS + NUM_PSEUDO_REGS); | |
388 | return TARGET_INT_BIT / HOST_CHAR_BIT; | |
389 | } | |
390 | ||
ce29138a MS |
391 | /* Assume the virtual size corresponds to the virtual type. */ |
392 | ||
393 | int | |
394 | generic_register_virtual_size (int regnum) | |
395 | { | |
ef8570de | 396 | return TYPE_LENGTH (REGISTER_VIRTUAL_TYPE (regnum)); |
ce29138a MS |
397 | } |
398 | ||
01fb7433 | 399 | \f |
b4a20239 AC |
400 | /* Functions to manipulate the endianness of the target. */ |
401 | ||
402 | #ifdef TARGET_BYTE_ORDER_SELECTABLE | |
403 | /* compat - Catch old targets that expect a selectable byte-order to | |
d7449b42 | 404 | default to BFD_ENDIAN_BIG */ |
b4a20239 | 405 | #ifndef TARGET_BYTE_ORDER_DEFAULT |
d7449b42 | 406 | #define TARGET_BYTE_ORDER_DEFAULT BFD_ENDIAN_BIG |
b4a20239 AC |
407 | #endif |
408 | #endif | |
409 | #if !TARGET_BYTE_ORDER_SELECTABLE_P | |
410 | #ifndef TARGET_BYTE_ORDER_DEFAULT | |
411 | /* compat - Catch old non byte-order selectable targets that do not | |
412 | define TARGET_BYTE_ORDER_DEFAULT and instead expect | |
413 | TARGET_BYTE_ORDER to be used as the default. For targets that | |
414 | defined neither TARGET_BYTE_ORDER nor TARGET_BYTE_ORDER_DEFAULT the | |
415 | below will get a strange compiler warning. */ | |
416 | #define TARGET_BYTE_ORDER_DEFAULT TARGET_BYTE_ORDER | |
417 | #endif | |
418 | #endif | |
419 | #ifndef TARGET_BYTE_ORDER_DEFAULT | |
d7449b42 | 420 | #define TARGET_BYTE_ORDER_DEFAULT BFD_ENDIAN_BIG /* arbitrary */ |
b4a20239 | 421 | #endif |
1ba607ad AC |
422 | /* ``target_byte_order'' is only used when non- multi-arch. |
423 | Multi-arch targets obtain the current byte order using | |
424 | TARGET_BYTE_ORDER which is controlled by gdbarch.*. */ | |
b4a20239 AC |
425 | int target_byte_order = TARGET_BYTE_ORDER_DEFAULT; |
426 | int target_byte_order_auto = 1; | |
427 | ||
53904c9e AC |
428 | static const char endian_big[] = "big"; |
429 | static const char endian_little[] = "little"; | |
430 | static const char endian_auto[] = "auto"; | |
431 | static const char *endian_enum[] = | |
b4a20239 AC |
432 | { |
433 | endian_big, | |
434 | endian_little, | |
435 | endian_auto, | |
436 | NULL, | |
437 | }; | |
53904c9e | 438 | static const char *set_endian_string; |
b4a20239 AC |
439 | |
440 | /* Called by ``show endian''. */ | |
441 | ||
442 | static void | |
443 | show_endian (char *args, int from_tty) | |
444 | { | |
445 | if (TARGET_BYTE_ORDER_AUTO) | |
446 | printf_unfiltered ("The target endianness is set automatically (currently %s endian)\n", | |
d7449b42 | 447 | (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little")); |
b4a20239 AC |
448 | else |
449 | printf_unfiltered ("The target is assumed to be %s endian\n", | |
d7449b42 | 450 | (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little")); |
b4a20239 AC |
451 | } |
452 | ||
453 | static void | |
454 | set_endian (char *ignore_args, int from_tty, struct cmd_list_element *c) | |
455 | { | |
456 | if (!TARGET_BYTE_ORDER_SELECTABLE_P) | |
457 | { | |
458 | printf_unfiltered ("Byte order is not selectable."); | |
459 | } | |
460 | else if (set_endian_string == endian_auto) | |
461 | { | |
462 | target_byte_order_auto = 1; | |
463 | } | |
464 | else if (set_endian_string == endian_little) | |
465 | { | |
b4a20239 AC |
466 | target_byte_order_auto = 0; |
467 | if (GDB_MULTI_ARCH) | |
468 | { | |
469 | struct gdbarch_info info; | |
fb6ecb0f | 470 | gdbarch_info_init (&info); |
778eb05e | 471 | info.byte_order = BFD_ENDIAN_LITTLE; |
16f33e29 AC |
472 | if (! gdbarch_update_p (info)) |
473 | { | |
474 | printf_unfiltered ("Little endian target not supported by GDB\n"); | |
475 | } | |
b4a20239 | 476 | } |
1ba607ad AC |
477 | else |
478 | { | |
778eb05e | 479 | target_byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad | 480 | } |
b4a20239 AC |
481 | } |
482 | else if (set_endian_string == endian_big) | |
483 | { | |
b4a20239 AC |
484 | target_byte_order_auto = 0; |
485 | if (GDB_MULTI_ARCH) | |
486 | { | |
487 | struct gdbarch_info info; | |
fb6ecb0f | 488 | gdbarch_info_init (&info); |
d7449b42 | 489 | info.byte_order = BFD_ENDIAN_BIG; |
16f33e29 AC |
490 | if (! gdbarch_update_p (info)) |
491 | { | |
492 | printf_unfiltered ("Big endian target not supported by GDB\n"); | |
493 | } | |
b4a20239 | 494 | } |
1ba607ad AC |
495 | else |
496 | { | |
d7449b42 | 497 | target_byte_order = BFD_ENDIAN_BIG; |
1ba607ad | 498 | } |
b4a20239 AC |
499 | } |
500 | else | |
8e65ff28 AC |
501 | internal_error (__FILE__, __LINE__, |
502 | "set_endian: bad value"); | |
b4a20239 AC |
503 | show_endian (NULL, from_tty); |
504 | } | |
505 | ||
506 | /* Set the endianness from a BFD. */ | |
507 | ||
508 | static void | |
509 | set_endian_from_file (bfd *abfd) | |
510 | { | |
1ba607ad | 511 | if (GDB_MULTI_ARCH) |
8e65ff28 AC |
512 | internal_error (__FILE__, __LINE__, |
513 | "set_endian_from_file: not for multi-arch"); | |
b4a20239 AC |
514 | if (TARGET_BYTE_ORDER_SELECTABLE_P) |
515 | { | |
516 | int want; | |
517 | ||
518 | if (bfd_big_endian (abfd)) | |
d7449b42 | 519 | want = BFD_ENDIAN_BIG; |
b4a20239 | 520 | else |
778eb05e | 521 | want = BFD_ENDIAN_LITTLE; |
b4a20239 AC |
522 | if (TARGET_BYTE_ORDER_AUTO) |
523 | target_byte_order = want; | |
524 | else if (TARGET_BYTE_ORDER != want) | |
525 | warning ("%s endian file does not match %s endian target.", | |
d7449b42 AC |
526 | want == BFD_ENDIAN_BIG ? "big" : "little", |
527 | TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little"); | |
b4a20239 AC |
528 | } |
529 | else | |
530 | { | |
531 | if (bfd_big_endian (abfd) | |
d7449b42 AC |
532 | ? TARGET_BYTE_ORDER != BFD_ENDIAN_BIG |
533 | : TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) | |
b4a20239 AC |
534 | warning ("%s endian file does not match %s endian target.", |
535 | bfd_big_endian (abfd) ? "big" : "little", | |
d7449b42 | 536 | TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little"); |
b4a20239 AC |
537 | } |
538 | } | |
539 | ||
540 | ||
541 | /* Functions to manipulate the architecture of the target */ | |
542 | ||
543 | enum set_arch { set_arch_auto, set_arch_manual }; | |
544 | ||
545 | int target_architecture_auto = 1; | |
546 | ||
53904c9e | 547 | const char *set_architecture_string; |
b4a20239 AC |
548 | |
549 | /* Old way of changing the current architecture. */ | |
550 | ||
551 | extern const struct bfd_arch_info bfd_default_arch_struct; | |
552 | const struct bfd_arch_info *target_architecture = &bfd_default_arch_struct; | |
553 | int (*target_architecture_hook) (const struct bfd_arch_info *ap); | |
554 | ||
555 | static int | |
556 | arch_ok (const struct bfd_arch_info *arch) | |
557 | { | |
558 | if (GDB_MULTI_ARCH) | |
8e65ff28 AC |
559 | internal_error (__FILE__, __LINE__, |
560 | "arch_ok: not multi-arched"); | |
b4a20239 AC |
561 | /* Should be performing the more basic check that the binary is |
562 | compatible with GDB. */ | |
563 | /* Check with the target that the architecture is valid. */ | |
564 | return (target_architecture_hook == NULL | |
565 | || target_architecture_hook (arch)); | |
566 | } | |
567 | ||
568 | static void | |
569 | set_arch (const struct bfd_arch_info *arch, | |
570 | enum set_arch type) | |
571 | { | |
572 | if (GDB_MULTI_ARCH) | |
8e65ff28 AC |
573 | internal_error (__FILE__, __LINE__, |
574 | "set_arch: not multi-arched"); | |
b4a20239 AC |
575 | switch (type) |
576 | { | |
577 | case set_arch_auto: | |
578 | if (!arch_ok (arch)) | |
579 | warning ("Target may not support %s architecture", | |
580 | arch->printable_name); | |
581 | target_architecture = arch; | |
582 | break; | |
583 | case set_arch_manual: | |
584 | if (!arch_ok (arch)) | |
585 | { | |
586 | printf_unfiltered ("Target does not support `%s' architecture.\n", | |
587 | arch->printable_name); | |
588 | } | |
589 | else | |
590 | { | |
591 | target_architecture_auto = 0; | |
592 | target_architecture = arch; | |
593 | } | |
594 | break; | |
595 | } | |
596 | if (gdbarch_debug) | |
4b9b3959 | 597 | gdbarch_dump (current_gdbarch, gdb_stdlog); |
b4a20239 AC |
598 | } |
599 | ||
600 | /* Set the architecture from arch/machine (deprecated) */ | |
601 | ||
602 | void | |
603 | set_architecture_from_arch_mach (enum bfd_architecture arch, | |
604 | unsigned long mach) | |
605 | { | |
606 | const struct bfd_arch_info *wanted = bfd_lookup_arch (arch, mach); | |
607 | if (GDB_MULTI_ARCH) | |
8e65ff28 AC |
608 | internal_error (__FILE__, __LINE__, |
609 | "set_architecture_from_arch_mach: not multi-arched"); | |
b4a20239 AC |
610 | if (wanted != NULL) |
611 | set_arch (wanted, set_arch_manual); | |
612 | else | |
8e65ff28 AC |
613 | internal_error (__FILE__, __LINE__, |
614 | "gdbarch: hardwired architecture/machine not recognized"); | |
b4a20239 AC |
615 | } |
616 | ||
617 | /* Set the architecture from a BFD (deprecated) */ | |
618 | ||
619 | static void | |
620 | set_architecture_from_file (bfd *abfd) | |
621 | { | |
622 | const struct bfd_arch_info *wanted = bfd_get_arch_info (abfd); | |
623 | if (GDB_MULTI_ARCH) | |
8e65ff28 AC |
624 | internal_error (__FILE__, __LINE__, |
625 | "set_architecture_from_file: not multi-arched"); | |
b4a20239 AC |
626 | if (target_architecture_auto) |
627 | { | |
628 | set_arch (wanted, set_arch_auto); | |
629 | } | |
630 | else if (wanted != target_architecture) | |
631 | { | |
632 | warning ("%s architecture file may be incompatible with %s target.", | |
633 | wanted->printable_name, | |
634 | target_architecture->printable_name); | |
635 | } | |
636 | } | |
637 | ||
638 | ||
639 | /* Called if the user enters ``show architecture'' without an | |
640 | argument. */ | |
641 | ||
642 | static void | |
643 | show_architecture (char *args, int from_tty) | |
644 | { | |
645 | const char *arch; | |
646 | arch = TARGET_ARCHITECTURE->printable_name; | |
647 | if (target_architecture_auto) | |
648 | printf_filtered ("The target architecture is set automatically (currently %s)\n", arch); | |
649 | else | |
650 | printf_filtered ("The target architecture is assumed to be %s\n", arch); | |
651 | } | |
652 | ||
653 | ||
654 | /* Called if the user enters ``set architecture'' with or without an | |
655 | argument. */ | |
656 | ||
657 | static void | |
658 | set_architecture (char *ignore_args, int from_tty, struct cmd_list_element *c) | |
659 | { | |
660 | if (strcmp (set_architecture_string, "auto") == 0) | |
661 | { | |
662 | target_architecture_auto = 1; | |
663 | } | |
664 | else if (GDB_MULTI_ARCH) | |
665 | { | |
666 | struct gdbarch_info info; | |
fb6ecb0f | 667 | gdbarch_info_init (&info); |
b4a20239 AC |
668 | info.bfd_arch_info = bfd_scan_arch (set_architecture_string); |
669 | if (info.bfd_arch_info == NULL) | |
8e65ff28 AC |
670 | internal_error (__FILE__, __LINE__, |
671 | "set_architecture: bfd_scan_arch failed"); | |
16f33e29 | 672 | if (gdbarch_update_p (info)) |
b4a20239 AC |
673 | target_architecture_auto = 0; |
674 | else | |
ec3d358c | 675 | printf_unfiltered ("Architecture `%s' not recognized.\n", |
b4a20239 AC |
676 | set_architecture_string); |
677 | } | |
678 | else | |
679 | { | |
680 | const struct bfd_arch_info *arch | |
681 | = bfd_scan_arch (set_architecture_string); | |
682 | if (arch == NULL) | |
8e65ff28 AC |
683 | internal_error (__FILE__, __LINE__, |
684 | "set_architecture: bfd_scan_arch failed"); | |
b4a20239 AC |
685 | set_arch (arch, set_arch_manual); |
686 | } | |
687 | show_architecture (NULL, from_tty); | |
688 | } | |
689 | ||
b7d6b182 | 690 | /* Set the dynamic target-system-dependent parameters (architecture, |
b4a20239 AC |
691 | byte-order) using information found in the BFD */ |
692 | ||
693 | void | |
fba45db2 | 694 | set_gdbarch_from_file (bfd *abfd) |
b4a20239 AC |
695 | { |
696 | if (GDB_MULTI_ARCH) | |
697 | { | |
698 | struct gdbarch_info info; | |
fb6ecb0f | 699 | gdbarch_info_init (&info); |
b4a20239 | 700 | info.abfd = abfd; |
16f33e29 | 701 | if (! gdbarch_update_p (info)) |
ec3d358c | 702 | error ("Architecture of file not recognized.\n"); |
b4a20239 AC |
703 | } |
704 | else | |
705 | { | |
706 | set_architecture_from_file (abfd); | |
707 | set_endian_from_file (abfd); | |
708 | } | |
709 | } | |
710 | ||
711 | /* Initialize the current architecture. Update the ``set | |
712 | architecture'' command so that it specifies a list of valid | |
713 | architectures. */ | |
714 | ||
1ba607ad AC |
715 | #ifdef DEFAULT_BFD_ARCH |
716 | extern const bfd_arch_info_type DEFAULT_BFD_ARCH; | |
717 | static const bfd_arch_info_type *default_bfd_arch = &DEFAULT_BFD_ARCH; | |
718 | #else | |
4b9b3959 | 719 | static const bfd_arch_info_type *default_bfd_arch; |
1ba607ad AC |
720 | #endif |
721 | ||
722 | #ifdef DEFAULT_BFD_VEC | |
723 | extern const bfd_target DEFAULT_BFD_VEC; | |
724 | static const bfd_target *default_bfd_vec = &DEFAULT_BFD_VEC; | |
725 | #else | |
726 | static const bfd_target *default_bfd_vec; | |
727 | #endif | |
728 | ||
b4a20239 AC |
729 | void |
730 | initialize_current_architecture (void) | |
731 | { | |
732 | const char **arches = gdbarch_printable_names (); | |
b4a20239 | 733 | |
1ba607ad AC |
734 | /* determine a default architecture and byte order. */ |
735 | struct gdbarch_info info; | |
fb6ecb0f | 736 | gdbarch_info_init (&info); |
1ba607ad AC |
737 | |
738 | /* Find a default architecture. */ | |
739 | if (info.bfd_arch_info == NULL | |
740 | && default_bfd_arch != NULL) | |
741 | info.bfd_arch_info = default_bfd_arch; | |
742 | if (info.bfd_arch_info == NULL) | |
b4a20239 | 743 | { |
1ba607ad AC |
744 | /* Choose the architecture by taking the first one |
745 | alphabetically. */ | |
746 | const char *chosen = arches[0]; | |
b4a20239 | 747 | const char **arch; |
b4a20239 AC |
748 | for (arch = arches; *arch != NULL; arch++) |
749 | { | |
b4a20239 AC |
750 | if (strcmp (*arch, chosen) < 0) |
751 | chosen = *arch; | |
752 | } | |
753 | if (chosen == NULL) | |
8e65ff28 AC |
754 | internal_error (__FILE__, __LINE__, |
755 | "initialize_current_architecture: No arch"); | |
b4a20239 AC |
756 | info.bfd_arch_info = bfd_scan_arch (chosen); |
757 | if (info.bfd_arch_info == NULL) | |
8e65ff28 AC |
758 | internal_error (__FILE__, __LINE__, |
759 | "initialize_current_architecture: Arch not found"); | |
1ba607ad AC |
760 | } |
761 | ||
762 | /* take several guesses at a byte order. */ | |
763 | /* NB: can't use TARGET_BYTE_ORDER_DEFAULT as its definition is | |
764 | forced above. */ | |
428721aa | 765 | if (info.byte_order == BFD_ENDIAN_UNKNOWN |
1ba607ad AC |
766 | && default_bfd_vec != NULL) |
767 | { | |
768 | /* Extract BFD's default vector's byte order. */ | |
769 | switch (default_bfd_vec->byteorder) | |
770 | { | |
771 | case BFD_ENDIAN_BIG: | |
d7449b42 | 772 | info.byte_order = BFD_ENDIAN_BIG; |
1ba607ad AC |
773 | break; |
774 | case BFD_ENDIAN_LITTLE: | |
778eb05e | 775 | info.byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad AC |
776 | break; |
777 | default: | |
778 | break; | |
779 | } | |
780 | } | |
428721aa | 781 | if (info.byte_order == BFD_ENDIAN_UNKNOWN) |
1ba607ad AC |
782 | { |
783 | /* look for ``*el-*'' in the target name. */ | |
784 | const char *chp; | |
785 | chp = strchr (target_name, '-'); | |
786 | if (chp != NULL | |
787 | && chp - 2 >= target_name | |
788 | && strncmp (chp - 2, "el", 2) == 0) | |
778eb05e | 789 | info.byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad | 790 | } |
428721aa | 791 | if (info.byte_order == BFD_ENDIAN_UNKNOWN) |
1ba607ad AC |
792 | { |
793 | /* Wire it to big-endian!!! */ | |
d7449b42 | 794 | info.byte_order = BFD_ENDIAN_BIG; |
1ba607ad AC |
795 | } |
796 | ||
797 | if (GDB_MULTI_ARCH) | |
798 | { | |
16f33e29 AC |
799 | if (! gdbarch_update_p (info)) |
800 | { | |
8e65ff28 AC |
801 | internal_error (__FILE__, __LINE__, |
802 | "initialize_current_architecture: Selection of initial architecture failed"); | |
16f33e29 | 803 | } |
b4a20239 | 804 | } |
ceaa8edf JB |
805 | else |
806 | initialize_non_multiarch (); | |
b4a20239 | 807 | |
1ba607ad AC |
808 | /* Create the ``set architecture'' command appending ``auto'' to the |
809 | list of architectures. */ | |
b4a20239 AC |
810 | { |
811 | struct cmd_list_element *c; | |
812 | /* Append ``auto''. */ | |
813 | int nr; | |
814 | for (nr = 0; arches[nr] != NULL; nr++); | |
815 | arches = xrealloc (arches, sizeof (char*) * (nr + 2)); | |
816 | arches[nr + 0] = "auto"; | |
817 | arches[nr + 1] = NULL; | |
818 | /* FIXME: add_set_enum_cmd() uses an array of ``char *'' instead | |
819 | of ``const char *''. We just happen to know that the casts are | |
820 | safe. */ | |
821 | c = add_set_enum_cmd ("architecture", class_support, | |
53904c9e | 822 | arches, &set_architecture_string, |
b4a20239 AC |
823 | "Set architecture of target.", |
824 | &setlist); | |
825 | c->function.sfunc = set_architecture; | |
826 | add_alias_cmd ("processor", "architecture", class_support, 1, &setlist); | |
827 | /* Don't use set_from_show - need to print both auto/manual and | |
828 | current setting. */ | |
829 | add_cmd ("architecture", class_support, show_architecture, | |
830 | "Show the current target architecture", &showlist); | |
b4a20239 AC |
831 | } |
832 | } | |
833 | ||
834 | ||
fb6ecb0f AC |
835 | /* Initialize a gdbarch info to values that will be automatically |
836 | overridden. Note: Originally, this ``struct info'' was initialized | |
837 | using memset(0). Unfortunatly, that ran into problems, namely | |
838 | BFD_ENDIAN_BIG is zero. An explicit initialization function that | |
839 | can explicitly set each field to a well defined value is used. */ | |
840 | ||
841 | void | |
842 | gdbarch_info_init (struct gdbarch_info *info) | |
843 | { | |
844 | memset (info, 0, sizeof (struct gdbarch_info)); | |
428721aa | 845 | info->byte_order = BFD_ENDIAN_UNKNOWN; |
fb6ecb0f AC |
846 | } |
847 | ||
c0e8c252 AC |
848 | /* */ |
849 | ||
b4a20239 | 850 | extern initialize_file_ftype _initialize_gdbarch_utils; |
c0e8c252 AC |
851 | |
852 | void | |
b4a20239 | 853 | _initialize_gdbarch_utils (void) |
c0e8c252 | 854 | { |
b4a20239 AC |
855 | struct cmd_list_element *c; |
856 | c = add_set_enum_cmd ("endian", class_support, | |
857 | endian_enum, &set_endian_string, | |
858 | "Set endianness of target.", | |
859 | &setlist); | |
860 | c->function.sfunc = set_endian; | |
861 | /* Don't use set_from_show - need to print both auto/manual and | |
862 | current setting. */ | |
863 | add_cmd ("endian", class_support, show_endian, | |
864 | "Show the current byte-order", &showlist); | |
c0e8c252 | 865 | } |