Commit | Line | Data |
---|---|---|
c0e8c252 | 1 | /* Dynamic architecture support for GDB, the GNU debugger. |
f4f9705a AC |
2 | |
3 | Copyright 1998, 1999, 2000, 2001, 2002 Free Software Foundation, | |
4 | Inc. | |
c0e8c252 AC |
5 | |
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 59 Temple Place - Suite 330, | |
21 | Boston, MA 02111-1307, USA. */ | |
22 | ||
23 | #include "defs.h" | |
24 | ||
25 | #if GDB_MULTI_ARCH | |
fb6ecb0f | 26 | #include "arch-utils.h" |
c0e8c252 AC |
27 | #include "gdbcmd.h" |
28 | #include "inferior.h" /* enum CALL_DUMMY_LOCATION et.al. */ | |
29 | #else | |
30 | /* Just include everything in sight so that the every old definition | |
31 | of macro is visible. */ | |
32 | #include "gdb_string.h" | |
c0e8c252 AC |
33 | #include "symtab.h" |
34 | #include "frame.h" | |
35 | #include "inferior.h" | |
36 | #include "breakpoint.h" | |
37 | #include "gdb_wait.h" | |
38 | #include "gdbcore.h" | |
39 | #include "gdbcmd.h" | |
40 | #include "target.h" | |
c0e8c252 | 41 | #include "annotate.h" |
c0e8c252 | 42 | #endif |
fbec36e2 | 43 | #include "regcache.h" |
39d4ef09 | 44 | #include "gdb_assert.h" |
c0e8c252 | 45 | |
1ba607ad AC |
46 | #include "version.h" |
47 | ||
f0d4cc9e AC |
48 | #include "floatformat.h" |
49 | ||
c0e8c252 AC |
50 | /* Use the program counter to determine the contents and size |
51 | of a breakpoint instruction. If no target-dependent macro | |
52 | BREAKPOINT_FROM_PC has been defined to implement this function, | |
53 | assume that the breakpoint doesn't depend on the PC, and | |
54 | use the values of the BIG_BREAKPOINT and LITTLE_BREAKPOINT macros. | |
55 | Return a pointer to a string of bytes that encode a breakpoint | |
56 | instruction, stores the length of the string to *lenptr, | |
57 | and optionally adjust the pc to point to the correct memory location | |
58 | for inserting the breakpoint. */ | |
59 | ||
f4f9705a | 60 | const unsigned char * |
c0e8c252 AC |
61 | legacy_breakpoint_from_pc (CORE_ADDR * pcptr, int *lenptr) |
62 | { | |
63 | /* {BIG_,LITTLE_}BREAKPOINT is the sequence of bytes we insert for a | |
64 | breakpoint. On some machines, breakpoints are handled by the | |
65 | target environment and we don't have to worry about them here. */ | |
66 | #ifdef BIG_BREAKPOINT | |
d7449b42 | 67 | if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) |
c0e8c252 AC |
68 | { |
69 | static unsigned char big_break_insn[] = BIG_BREAKPOINT; | |
70 | *lenptr = sizeof (big_break_insn); | |
71 | return big_break_insn; | |
72 | } | |
73 | #endif | |
74 | #ifdef LITTLE_BREAKPOINT | |
d7449b42 | 75 | if (TARGET_BYTE_ORDER != BFD_ENDIAN_BIG) |
c0e8c252 AC |
76 | { |
77 | static unsigned char little_break_insn[] = LITTLE_BREAKPOINT; | |
78 | *lenptr = sizeof (little_break_insn); | |
79 | return little_break_insn; | |
80 | } | |
81 | #endif | |
82 | #ifdef BREAKPOINT | |
83 | { | |
84 | static unsigned char break_insn[] = BREAKPOINT; | |
85 | *lenptr = sizeof (break_insn); | |
86 | return break_insn; | |
87 | } | |
88 | #endif | |
89 | *lenptr = 0; | |
90 | return NULL; | |
91 | } | |
92 | ||
93 | int | |
94 | generic_frameless_function_invocation_not (struct frame_info *fi) | |
95 | { | |
96 | return 0; | |
97 | } | |
98 | ||
71a9f22e JB |
99 | int |
100 | generic_return_value_on_stack_not (struct type *type) | |
101 | { | |
102 | return 0; | |
103 | } | |
104 | ||
bdcd319a CV |
105 | CORE_ADDR |
106 | generic_skip_trampoline_code (CORE_ADDR pc) | |
107 | { | |
108 | return 0; | |
109 | } | |
110 | ||
68e9cc94 CV |
111 | int |
112 | generic_in_solib_call_trampoline (CORE_ADDR pc, char *name) | |
113 | { | |
114 | return 0; | |
115 | } | |
116 | ||
c12260ac CV |
117 | int |
118 | generic_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc) | |
119 | { | |
120 | return 0; | |
121 | } | |
122 | ||
c0e8c252 AC |
123 | char * |
124 | legacy_register_name (int i) | |
125 | { | |
126 | #ifdef REGISTER_NAMES | |
127 | static char *names[] = REGISTER_NAMES; | |
128 | if (i < 0 || i >= (sizeof (names) / sizeof (*names))) | |
129 | return NULL; | |
130 | else | |
131 | return names[i]; | |
132 | #else | |
8e65ff28 AC |
133 | internal_error (__FILE__, __LINE__, |
134 | "legacy_register_name: called."); | |
c0e8c252 AC |
135 | return NULL; |
136 | #endif | |
137 | } | |
138 | ||
139 | #if defined (CALL_DUMMY) | |
140 | LONGEST legacy_call_dummy_words[] = CALL_DUMMY; | |
141 | #else | |
142 | LONGEST legacy_call_dummy_words[1]; | |
143 | #endif | |
144 | int legacy_sizeof_call_dummy_words = sizeof (legacy_call_dummy_words); | |
145 | ||
146 | void | |
147 | generic_remote_translate_xfer_address (CORE_ADDR gdb_addr, int gdb_len, | |
148 | CORE_ADDR * rem_addr, int *rem_len) | |
149 | { | |
150 | *rem_addr = gdb_addr; | |
151 | *rem_len = gdb_len; | |
152 | } | |
153 | ||
dad41f9a AC |
154 | int |
155 | generic_prologue_frameless_p (CORE_ADDR ip) | |
156 | { | |
dad41f9a | 157 | return ip == SKIP_PROLOGUE (ip); |
dad41f9a AC |
158 | } |
159 | ||
2bf0cb65 EZ |
160 | /* New/multi-arched targets should use the correct gdbarch field |
161 | instead of using this global pointer. */ | |
162 | int | |
163 | legacy_print_insn (bfd_vma vma, disassemble_info *info) | |
164 | { | |
165 | return (*tm_print_insn) (vma, info); | |
166 | } | |
dad41f9a | 167 | |
3339cf8b AC |
168 | /* Helper functions for INNER_THAN */ |
169 | ||
170 | int | |
fba45db2 | 171 | core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs) |
3339cf8b AC |
172 | { |
173 | return (lhs < rhs); | |
174 | } | |
175 | ||
176 | int | |
fba45db2 | 177 | core_addr_greaterthan (CORE_ADDR lhs, CORE_ADDR rhs) |
3339cf8b AC |
178 | { |
179 | return (lhs > rhs); | |
180 | } | |
181 | ||
182 | ||
f0d4cc9e AC |
183 | /* Helper functions for TARGET_{FLOAT,DOUBLE}_FORMAT */ |
184 | ||
185 | const struct floatformat * | |
186 | default_float_format (struct gdbarch *gdbarch) | |
187 | { | |
188 | #if GDB_MULTI_ARCH | |
189 | int byte_order = gdbarch_byte_order (gdbarch); | |
190 | #else | |
191 | int byte_order = TARGET_BYTE_ORDER; | |
192 | #endif | |
193 | switch (byte_order) | |
194 | { | |
d7449b42 | 195 | case BFD_ENDIAN_BIG: |
f0d4cc9e | 196 | return &floatformat_ieee_single_big; |
778eb05e | 197 | case BFD_ENDIAN_LITTLE: |
f0d4cc9e AC |
198 | return &floatformat_ieee_single_little; |
199 | default: | |
8e65ff28 AC |
200 | internal_error (__FILE__, __LINE__, |
201 | "default_float_format: bad byte order"); | |
f0d4cc9e AC |
202 | } |
203 | } | |
204 | ||
205 | ||
206 | const struct floatformat * | |
207 | default_double_format (struct gdbarch *gdbarch) | |
208 | { | |
209 | #if GDB_MULTI_ARCH | |
210 | int byte_order = gdbarch_byte_order (gdbarch); | |
211 | #else | |
212 | int byte_order = TARGET_BYTE_ORDER; | |
213 | #endif | |
214 | switch (byte_order) | |
215 | { | |
d7449b42 | 216 | case BFD_ENDIAN_BIG: |
f0d4cc9e | 217 | return &floatformat_ieee_double_big; |
778eb05e | 218 | case BFD_ENDIAN_LITTLE: |
f0d4cc9e AC |
219 | return &floatformat_ieee_double_little; |
220 | default: | |
8e65ff28 AC |
221 | internal_error (__FILE__, __LINE__, |
222 | "default_double_format: bad byte order"); | |
f0d4cc9e AC |
223 | } |
224 | } | |
225 | ||
5e74b15c RE |
226 | void |
227 | default_print_float_info (void) | |
228 | { | |
229 | #ifdef FLOAT_INFO | |
230 | #if GDB_MULTI_ARCH > GDB_MULTI_ARCH_PARTIAL | |
231 | #error "FLOAT_INFO defined in multi-arch" | |
232 | #endif | |
233 | FLOAT_INFO; | |
234 | #else | |
235 | printf_filtered ("No floating point info available for this processor.\n"); | |
236 | #endif | |
237 | } | |
238 | ||
193e3b1a AC |
239 | /* Misc helper functions for targets. */ |
240 | ||
241 | int | |
fba45db2 | 242 | frame_num_args_unknown (struct frame_info *fi) |
193e3b1a AC |
243 | { |
244 | return -1; | |
245 | } | |
246 | ||
247 | ||
248 | int | |
fba45db2 | 249 | generic_register_convertible_not (int num) |
193e3b1a AC |
250 | { |
251 | return 0; | |
252 | } | |
253 | ||
b4a20239 | 254 | |
c8f9d51c JB |
255 | /* Under some ABI's that specify the `struct convention' for returning |
256 | structures by value, by the time we've returned from the function, | |
257 | the return value is sitting there in the caller's buffer, but GDB | |
258 | has no way to find the address of that buffer. | |
259 | ||
260 | On such architectures, use this function as your | |
261 | extract_struct_value_address method. When asked to a struct | |
262 | returned by value in this fashion, GDB will print a nice error | |
263 | message, instead of garbage. */ | |
264 | CORE_ADDR | |
265 | generic_cannot_extract_struct_value_address (char *dummy) | |
266 | { | |
267 | return 0; | |
268 | } | |
269 | ||
7c7651b2 AC |
270 | int |
271 | default_register_sim_regno (int num) | |
272 | { | |
273 | return num; | |
274 | } | |
275 | ||
f517ea4e PS |
276 | |
277 | CORE_ADDR | |
875e1767 | 278 | core_addr_identity (CORE_ADDR addr) |
f517ea4e PS |
279 | { |
280 | return addr; | |
281 | } | |
282 | ||
88c72b7d AC |
283 | int |
284 | no_op_reg_to_regnum (int reg) | |
285 | { | |
286 | return reg; | |
287 | } | |
288 | ||
c347ee3e MS |
289 | /* For use by frame_args_address and frame_locals_address. */ |
290 | CORE_ADDR | |
291 | default_frame_address (struct frame_info *fi) | |
292 | { | |
293 | return fi->frame; | |
294 | } | |
295 | ||
e02bc4cc DS |
296 | /* Default prepare_to_procced(). */ |
297 | int | |
298 | default_prepare_to_proceed (int select_it) | |
299 | { | |
300 | return 0; | |
301 | } | |
302 | ||
303 | /* Generic prepare_to_proceed(). This one should be suitable for most | |
304 | targets that support threads. */ | |
305 | int | |
306 | generic_prepare_to_proceed (int select_it) | |
307 | { | |
39f77062 | 308 | ptid_t wait_ptid; |
e02bc4cc DS |
309 | struct target_waitstatus wait_status; |
310 | ||
311 | /* Get the last target status returned by target_wait(). */ | |
39f77062 | 312 | get_last_target_status (&wait_ptid, &wait_status); |
e02bc4cc | 313 | |
8849f47d JL |
314 | /* Make sure we were stopped either at a breakpoint, or because |
315 | of a Ctrl-C. */ | |
e02bc4cc | 316 | if (wait_status.kind != TARGET_WAITKIND_STOPPED |
8849f47d JL |
317 | || (wait_status.value.sig != TARGET_SIGNAL_TRAP && |
318 | wait_status.value.sig != TARGET_SIGNAL_INT)) | |
e02bc4cc DS |
319 | { |
320 | return 0; | |
321 | } | |
322 | ||
39f77062 KB |
323 | if (!ptid_equal (wait_ptid, minus_one_ptid) |
324 | && !ptid_equal (inferior_ptid, wait_ptid)) | |
e02bc4cc DS |
325 | { |
326 | /* Switched over from WAIT_PID. */ | |
39f77062 | 327 | CORE_ADDR wait_pc = read_pc_pid (wait_ptid); |
e02bc4cc | 328 | |
8849f47d | 329 | if (wait_pc != read_pc ()) |
e02bc4cc DS |
330 | { |
331 | if (select_it) | |
332 | { | |
8849f47d | 333 | /* Switch back to WAIT_PID thread. */ |
39f77062 | 334 | inferior_ptid = wait_ptid; |
e02bc4cc DS |
335 | |
336 | /* FIXME: This stuff came from switch_to_thread() in | |
337 | thread.c (which should probably be a public function). */ | |
338 | flush_cached_frames (); | |
339 | registers_changed (); | |
340 | stop_pc = wait_pc; | |
0f7d239c | 341 | select_frame (get_current_frame ()); |
e02bc4cc | 342 | } |
8849f47d JL |
343 | /* We return 1 to indicate that there is a breakpoint here, |
344 | so we need to step over it before continuing to avoid | |
345 | hitting it straight away. */ | |
346 | if (breakpoint_here_p (wait_pc)) | |
347 | { | |
348 | return 1; | |
349 | } | |
e02bc4cc DS |
350 | } |
351 | } | |
352 | return 0; | |
353 | ||
354 | } | |
355 | ||
10312cc4 AC |
356 | void |
357 | init_frame_pc_noop (int fromleaf, struct frame_info *prev) | |
358 | { | |
359 | return; | |
360 | } | |
361 | ||
7824d2f2 AC |
362 | void |
363 | init_frame_pc_default (int fromleaf, struct frame_info *prev) | |
364 | { | |
365 | if (fromleaf) | |
366 | prev->pc = SAVED_PC_AFTER_CALL (prev->next); | |
367 | else if (prev->next != NULL) | |
368 | prev->pc = FRAME_SAVED_PC (prev->next); | |
369 | else | |
370 | prev->pc = read_pc (); | |
371 | } | |
372 | ||
a2cf933a EZ |
373 | void |
374 | default_elf_make_msymbol_special (asymbol *sym, struct minimal_symbol *msym) | |
375 | { | |
376 | return; | |
377 | } | |
378 | ||
379 | void | |
380 | default_coff_make_msymbol_special (int val, struct minimal_symbol *msym) | |
381 | { | |
382 | return; | |
383 | } | |
384 | ||
01fb7433 AC |
385 | int |
386 | cannot_register_not (int regnum) | |
387 | { | |
388 | return 0; | |
389 | } | |
39d4ef09 AC |
390 | |
391 | /* Legacy version of target_virtual_frame_pointer(). Assumes that | |
392 | there is an FP_REGNUM and that it is the same, cooked or raw. */ | |
393 | ||
394 | void | |
395 | legacy_virtual_frame_pointer (CORE_ADDR pc, | |
396 | int *frame_regnum, | |
397 | LONGEST *frame_offset) | |
398 | { | |
399 | gdb_assert (FP_REGNUM >= 0); | |
400 | *frame_regnum = FP_REGNUM; | |
401 | *frame_offset = 0; | |
402 | } | |
46cd78fb | 403 | |
b2e75d78 AC |
404 | /* Assume the world is sane, every register's virtual and real size |
405 | is identical. */ | |
46cd78fb AC |
406 | |
407 | int | |
b2e75d78 | 408 | generic_register_size (int regnum) |
46cd78fb AC |
409 | { |
410 | gdb_assert (regnum >= 0 && regnum < NUM_REGS + NUM_PSEUDO_REGS); | |
ef8570de | 411 | return TYPE_LENGTH (REGISTER_VIRTUAL_TYPE (regnum)); |
ce29138a MS |
412 | } |
413 | ||
d7bd68ca AC |
414 | #if !defined (IN_SIGTRAMP) |
415 | #if defined (SIGTRAMP_START) | |
416 | #define IN_SIGTRAMP(pc, name) \ | |
417 | ((pc) >= SIGTRAMP_START(pc) \ | |
418 | && (pc) < SIGTRAMP_END(pc) \ | |
419 | ) | |
420 | #else | |
421 | #define IN_SIGTRAMP(pc, name) \ | |
422 | (name && STREQ ("_sigtramp", name)) | |
423 | #endif | |
424 | #endif | |
425 | \f | |
426 | int | |
427 | legacy_pc_in_sigtramp (CORE_ADDR pc, char *name) | |
428 | { | |
429 | return IN_SIGTRAMP(pc, name); | |
430 | } | |
431 | ||
13d01224 AC |
432 | int |
433 | legacy_convert_register_p (int regnum) | |
434 | { | |
435 | return REGISTER_CONVERTIBLE (regnum); | |
436 | } | |
437 | ||
438 | void | |
439 | legacy_register_to_value (int regnum, struct type *type, | |
440 | char *from, char *to) | |
441 | { | |
442 | REGISTER_CONVERT_TO_VIRTUAL (regnum, type, from, to); | |
443 | } | |
444 | ||
445 | void | |
446 | legacy_value_to_register (struct type *type, int regnum, | |
447 | char *from, char *to) | |
448 | { | |
449 | REGISTER_CONVERT_TO_RAW (type, regnum, from, to); | |
450 | } | |
451 | ||
01fb7433 | 452 | \f |
b4a20239 AC |
453 | /* Functions to manipulate the endianness of the target. */ |
454 | ||
1ba607ad | 455 | /* ``target_byte_order'' is only used when non- multi-arch. |
afe64c1a AC |
456 | Multi-arch targets obtain the current byte order using the |
457 | TARGET_BYTE_ORDER gdbarch method. | |
458 | ||
459 | The choice of initial value is entirely arbitrary. During startup, | |
460 | the function initialize_current_architecture() updates this value | |
461 | based on default byte-order information extracted from BFD. */ | |
462 | int target_byte_order = BFD_ENDIAN_BIG; | |
b4a20239 AC |
463 | int target_byte_order_auto = 1; |
464 | ||
53904c9e AC |
465 | static const char endian_big[] = "big"; |
466 | static const char endian_little[] = "little"; | |
467 | static const char endian_auto[] = "auto"; | |
468 | static const char *endian_enum[] = | |
b4a20239 AC |
469 | { |
470 | endian_big, | |
471 | endian_little, | |
472 | endian_auto, | |
473 | NULL, | |
474 | }; | |
53904c9e | 475 | static const char *set_endian_string; |
b4a20239 AC |
476 | |
477 | /* Called by ``show endian''. */ | |
478 | ||
479 | static void | |
480 | show_endian (char *args, int from_tty) | |
481 | { | |
482 | if (TARGET_BYTE_ORDER_AUTO) | |
483 | printf_unfiltered ("The target endianness is set automatically (currently %s endian)\n", | |
d7449b42 | 484 | (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little")); |
b4a20239 AC |
485 | else |
486 | printf_unfiltered ("The target is assumed to be %s endian\n", | |
d7449b42 | 487 | (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little")); |
b4a20239 AC |
488 | } |
489 | ||
490 | static void | |
491 | set_endian (char *ignore_args, int from_tty, struct cmd_list_element *c) | |
492 | { | |
3fd3d7d2 | 493 | if (set_endian_string == endian_auto) |
b4a20239 AC |
494 | { |
495 | target_byte_order_auto = 1; | |
496 | } | |
497 | else if (set_endian_string == endian_little) | |
498 | { | |
b4a20239 AC |
499 | target_byte_order_auto = 0; |
500 | if (GDB_MULTI_ARCH) | |
501 | { | |
502 | struct gdbarch_info info; | |
fb6ecb0f | 503 | gdbarch_info_init (&info); |
778eb05e | 504 | info.byte_order = BFD_ENDIAN_LITTLE; |
16f33e29 AC |
505 | if (! gdbarch_update_p (info)) |
506 | { | |
507 | printf_unfiltered ("Little endian target not supported by GDB\n"); | |
508 | } | |
b4a20239 | 509 | } |
1ba607ad AC |
510 | else |
511 | { | |
778eb05e | 512 | target_byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad | 513 | } |
b4a20239 AC |
514 | } |
515 | else if (set_endian_string == endian_big) | |
516 | { | |
b4a20239 AC |
517 | target_byte_order_auto = 0; |
518 | if (GDB_MULTI_ARCH) | |
519 | { | |
520 | struct gdbarch_info info; | |
fb6ecb0f | 521 | gdbarch_info_init (&info); |
d7449b42 | 522 | info.byte_order = BFD_ENDIAN_BIG; |
16f33e29 AC |
523 | if (! gdbarch_update_p (info)) |
524 | { | |
525 | printf_unfiltered ("Big endian target not supported by GDB\n"); | |
526 | } | |
b4a20239 | 527 | } |
1ba607ad AC |
528 | else |
529 | { | |
d7449b42 | 530 | target_byte_order = BFD_ENDIAN_BIG; |
1ba607ad | 531 | } |
b4a20239 AC |
532 | } |
533 | else | |
8e65ff28 AC |
534 | internal_error (__FILE__, __LINE__, |
535 | "set_endian: bad value"); | |
b4a20239 AC |
536 | show_endian (NULL, from_tty); |
537 | } | |
538 | ||
539 | /* Set the endianness from a BFD. */ | |
540 | ||
541 | static void | |
542 | set_endian_from_file (bfd *abfd) | |
543 | { | |
3fd3d7d2 | 544 | int want; |
1ba607ad | 545 | if (GDB_MULTI_ARCH) |
8e65ff28 AC |
546 | internal_error (__FILE__, __LINE__, |
547 | "set_endian_from_file: not for multi-arch"); | |
3fd3d7d2 AC |
548 | if (bfd_big_endian (abfd)) |
549 | want = BFD_ENDIAN_BIG; | |
b4a20239 | 550 | else |
3fd3d7d2 AC |
551 | want = BFD_ENDIAN_LITTLE; |
552 | if (TARGET_BYTE_ORDER_AUTO) | |
553 | target_byte_order = want; | |
554 | else if (TARGET_BYTE_ORDER != want) | |
555 | warning ("%s endian file does not match %s endian target.", | |
556 | want == BFD_ENDIAN_BIG ? "big" : "little", | |
557 | TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little"); | |
b4a20239 AC |
558 | } |
559 | ||
560 | ||
561 | /* Functions to manipulate the architecture of the target */ | |
562 | ||
563 | enum set_arch { set_arch_auto, set_arch_manual }; | |
564 | ||
565 | int target_architecture_auto = 1; | |
566 | ||
53904c9e | 567 | const char *set_architecture_string; |
b4a20239 AC |
568 | |
569 | /* Old way of changing the current architecture. */ | |
570 | ||
571 | extern const struct bfd_arch_info bfd_default_arch_struct; | |
572 | const struct bfd_arch_info *target_architecture = &bfd_default_arch_struct; | |
573 | int (*target_architecture_hook) (const struct bfd_arch_info *ap); | |
574 | ||
575 | static int | |
576 | arch_ok (const struct bfd_arch_info *arch) | |
577 | { | |
578 | if (GDB_MULTI_ARCH) | |
8e65ff28 AC |
579 | internal_error (__FILE__, __LINE__, |
580 | "arch_ok: not multi-arched"); | |
b4a20239 AC |
581 | /* Should be performing the more basic check that the binary is |
582 | compatible with GDB. */ | |
583 | /* Check with the target that the architecture is valid. */ | |
584 | return (target_architecture_hook == NULL | |
585 | || target_architecture_hook (arch)); | |
586 | } | |
587 | ||
588 | static void | |
589 | set_arch (const struct bfd_arch_info *arch, | |
590 | enum set_arch type) | |
591 | { | |
592 | if (GDB_MULTI_ARCH) | |
8e65ff28 AC |
593 | internal_error (__FILE__, __LINE__, |
594 | "set_arch: not multi-arched"); | |
b4a20239 AC |
595 | switch (type) |
596 | { | |
597 | case set_arch_auto: | |
598 | if (!arch_ok (arch)) | |
599 | warning ("Target may not support %s architecture", | |
600 | arch->printable_name); | |
601 | target_architecture = arch; | |
602 | break; | |
603 | case set_arch_manual: | |
604 | if (!arch_ok (arch)) | |
605 | { | |
606 | printf_unfiltered ("Target does not support `%s' architecture.\n", | |
607 | arch->printable_name); | |
608 | } | |
609 | else | |
610 | { | |
611 | target_architecture_auto = 0; | |
612 | target_architecture = arch; | |
613 | } | |
614 | break; | |
615 | } | |
616 | if (gdbarch_debug) | |
4b9b3959 | 617 | gdbarch_dump (current_gdbarch, gdb_stdlog); |
b4a20239 AC |
618 | } |
619 | ||
620 | /* Set the architecture from arch/machine (deprecated) */ | |
621 | ||
622 | void | |
623 | set_architecture_from_arch_mach (enum bfd_architecture arch, | |
624 | unsigned long mach) | |
625 | { | |
626 | const struct bfd_arch_info *wanted = bfd_lookup_arch (arch, mach); | |
627 | if (GDB_MULTI_ARCH) | |
8e65ff28 AC |
628 | internal_error (__FILE__, __LINE__, |
629 | "set_architecture_from_arch_mach: not multi-arched"); | |
b4a20239 AC |
630 | if (wanted != NULL) |
631 | set_arch (wanted, set_arch_manual); | |
632 | else | |
8e65ff28 AC |
633 | internal_error (__FILE__, __LINE__, |
634 | "gdbarch: hardwired architecture/machine not recognized"); | |
b4a20239 AC |
635 | } |
636 | ||
637 | /* Set the architecture from a BFD (deprecated) */ | |
638 | ||
639 | static void | |
640 | set_architecture_from_file (bfd *abfd) | |
641 | { | |
642 | const struct bfd_arch_info *wanted = bfd_get_arch_info (abfd); | |
643 | if (GDB_MULTI_ARCH) | |
8e65ff28 AC |
644 | internal_error (__FILE__, __LINE__, |
645 | "set_architecture_from_file: not multi-arched"); | |
b4a20239 AC |
646 | if (target_architecture_auto) |
647 | { | |
648 | set_arch (wanted, set_arch_auto); | |
649 | } | |
650 | else if (wanted != target_architecture) | |
651 | { | |
652 | warning ("%s architecture file may be incompatible with %s target.", | |
653 | wanted->printable_name, | |
654 | target_architecture->printable_name); | |
655 | } | |
656 | } | |
657 | ||
658 | ||
659 | /* Called if the user enters ``show architecture'' without an | |
660 | argument. */ | |
661 | ||
662 | static void | |
663 | show_architecture (char *args, int from_tty) | |
664 | { | |
665 | const char *arch; | |
666 | arch = TARGET_ARCHITECTURE->printable_name; | |
667 | if (target_architecture_auto) | |
668 | printf_filtered ("The target architecture is set automatically (currently %s)\n", arch); | |
669 | else | |
670 | printf_filtered ("The target architecture is assumed to be %s\n", arch); | |
671 | } | |
672 | ||
673 | ||
674 | /* Called if the user enters ``set architecture'' with or without an | |
675 | argument. */ | |
676 | ||
677 | static void | |
678 | set_architecture (char *ignore_args, int from_tty, struct cmd_list_element *c) | |
679 | { | |
680 | if (strcmp (set_architecture_string, "auto") == 0) | |
681 | { | |
682 | target_architecture_auto = 1; | |
683 | } | |
684 | else if (GDB_MULTI_ARCH) | |
685 | { | |
686 | struct gdbarch_info info; | |
fb6ecb0f | 687 | gdbarch_info_init (&info); |
b4a20239 AC |
688 | info.bfd_arch_info = bfd_scan_arch (set_architecture_string); |
689 | if (info.bfd_arch_info == NULL) | |
8e65ff28 AC |
690 | internal_error (__FILE__, __LINE__, |
691 | "set_architecture: bfd_scan_arch failed"); | |
16f33e29 | 692 | if (gdbarch_update_p (info)) |
b4a20239 AC |
693 | target_architecture_auto = 0; |
694 | else | |
ec3d358c | 695 | printf_unfiltered ("Architecture `%s' not recognized.\n", |
b4a20239 AC |
696 | set_architecture_string); |
697 | } | |
698 | else | |
699 | { | |
700 | const struct bfd_arch_info *arch | |
701 | = bfd_scan_arch (set_architecture_string); | |
702 | if (arch == NULL) | |
8e65ff28 AC |
703 | internal_error (__FILE__, __LINE__, |
704 | "set_architecture: bfd_scan_arch failed"); | |
b4a20239 AC |
705 | set_arch (arch, set_arch_manual); |
706 | } | |
707 | show_architecture (NULL, from_tty); | |
708 | } | |
709 | ||
b7d6b182 | 710 | /* Set the dynamic target-system-dependent parameters (architecture, |
b4a20239 AC |
711 | byte-order) using information found in the BFD */ |
712 | ||
713 | void | |
fba45db2 | 714 | set_gdbarch_from_file (bfd *abfd) |
b4a20239 AC |
715 | { |
716 | if (GDB_MULTI_ARCH) | |
717 | { | |
718 | struct gdbarch_info info; | |
fb6ecb0f | 719 | gdbarch_info_init (&info); |
b4a20239 | 720 | info.abfd = abfd; |
16f33e29 | 721 | if (! gdbarch_update_p (info)) |
ec3d358c | 722 | error ("Architecture of file not recognized.\n"); |
b4a20239 AC |
723 | } |
724 | else | |
725 | { | |
726 | set_architecture_from_file (abfd); | |
727 | set_endian_from_file (abfd); | |
728 | } | |
729 | } | |
730 | ||
731 | /* Initialize the current architecture. Update the ``set | |
732 | architecture'' command so that it specifies a list of valid | |
733 | architectures. */ | |
734 | ||
1ba607ad AC |
735 | #ifdef DEFAULT_BFD_ARCH |
736 | extern const bfd_arch_info_type DEFAULT_BFD_ARCH; | |
737 | static const bfd_arch_info_type *default_bfd_arch = &DEFAULT_BFD_ARCH; | |
738 | #else | |
4b9b3959 | 739 | static const bfd_arch_info_type *default_bfd_arch; |
1ba607ad AC |
740 | #endif |
741 | ||
742 | #ifdef DEFAULT_BFD_VEC | |
743 | extern const bfd_target DEFAULT_BFD_VEC; | |
744 | static const bfd_target *default_bfd_vec = &DEFAULT_BFD_VEC; | |
745 | #else | |
746 | static const bfd_target *default_bfd_vec; | |
747 | #endif | |
748 | ||
b4a20239 AC |
749 | void |
750 | initialize_current_architecture (void) | |
751 | { | |
752 | const char **arches = gdbarch_printable_names (); | |
b4a20239 | 753 | |
1ba607ad AC |
754 | /* determine a default architecture and byte order. */ |
755 | struct gdbarch_info info; | |
fb6ecb0f | 756 | gdbarch_info_init (&info); |
1ba607ad AC |
757 | |
758 | /* Find a default architecture. */ | |
759 | if (info.bfd_arch_info == NULL | |
760 | && default_bfd_arch != NULL) | |
761 | info.bfd_arch_info = default_bfd_arch; | |
762 | if (info.bfd_arch_info == NULL) | |
b4a20239 | 763 | { |
1ba607ad AC |
764 | /* Choose the architecture by taking the first one |
765 | alphabetically. */ | |
766 | const char *chosen = arches[0]; | |
b4a20239 | 767 | const char **arch; |
b4a20239 AC |
768 | for (arch = arches; *arch != NULL; arch++) |
769 | { | |
b4a20239 AC |
770 | if (strcmp (*arch, chosen) < 0) |
771 | chosen = *arch; | |
772 | } | |
773 | if (chosen == NULL) | |
8e65ff28 AC |
774 | internal_error (__FILE__, __LINE__, |
775 | "initialize_current_architecture: No arch"); | |
b4a20239 AC |
776 | info.bfd_arch_info = bfd_scan_arch (chosen); |
777 | if (info.bfd_arch_info == NULL) | |
8e65ff28 AC |
778 | internal_error (__FILE__, __LINE__, |
779 | "initialize_current_architecture: Arch not found"); | |
1ba607ad AC |
780 | } |
781 | ||
afe64c1a | 782 | /* Take several guesses at a byte order. */ |
428721aa | 783 | if (info.byte_order == BFD_ENDIAN_UNKNOWN |
1ba607ad AC |
784 | && default_bfd_vec != NULL) |
785 | { | |
786 | /* Extract BFD's default vector's byte order. */ | |
787 | switch (default_bfd_vec->byteorder) | |
788 | { | |
789 | case BFD_ENDIAN_BIG: | |
d7449b42 | 790 | info.byte_order = BFD_ENDIAN_BIG; |
1ba607ad AC |
791 | break; |
792 | case BFD_ENDIAN_LITTLE: | |
778eb05e | 793 | info.byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad AC |
794 | break; |
795 | default: | |
796 | break; | |
797 | } | |
798 | } | |
428721aa | 799 | if (info.byte_order == BFD_ENDIAN_UNKNOWN) |
1ba607ad AC |
800 | { |
801 | /* look for ``*el-*'' in the target name. */ | |
802 | const char *chp; | |
803 | chp = strchr (target_name, '-'); | |
804 | if (chp != NULL | |
805 | && chp - 2 >= target_name | |
806 | && strncmp (chp - 2, "el", 2) == 0) | |
778eb05e | 807 | info.byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad | 808 | } |
428721aa | 809 | if (info.byte_order == BFD_ENDIAN_UNKNOWN) |
1ba607ad AC |
810 | { |
811 | /* Wire it to big-endian!!! */ | |
d7449b42 | 812 | info.byte_order = BFD_ENDIAN_BIG; |
1ba607ad AC |
813 | } |
814 | ||
815 | if (GDB_MULTI_ARCH) | |
816 | { | |
16f33e29 AC |
817 | if (! gdbarch_update_p (info)) |
818 | { | |
8e65ff28 AC |
819 | internal_error (__FILE__, __LINE__, |
820 | "initialize_current_architecture: Selection of initial architecture failed"); | |
16f33e29 | 821 | } |
b4a20239 | 822 | } |
ceaa8edf | 823 | else |
afe64c1a AC |
824 | { |
825 | /* If the multi-arch logic comes up with a byte-order (from BFD) | |
826 | use it for the non-multi-arch case. */ | |
827 | if (info.byte_order != BFD_ENDIAN_UNKNOWN) | |
828 | target_byte_order = info.byte_order; | |
829 | initialize_non_multiarch (); | |
830 | } | |
b4a20239 | 831 | |
1ba607ad AC |
832 | /* Create the ``set architecture'' command appending ``auto'' to the |
833 | list of architectures. */ | |
b4a20239 AC |
834 | { |
835 | struct cmd_list_element *c; | |
836 | /* Append ``auto''. */ | |
837 | int nr; | |
838 | for (nr = 0; arches[nr] != NULL; nr++); | |
839 | arches = xrealloc (arches, sizeof (char*) * (nr + 2)); | |
840 | arches[nr + 0] = "auto"; | |
841 | arches[nr + 1] = NULL; | |
842 | /* FIXME: add_set_enum_cmd() uses an array of ``char *'' instead | |
843 | of ``const char *''. We just happen to know that the casts are | |
844 | safe. */ | |
845 | c = add_set_enum_cmd ("architecture", class_support, | |
53904c9e | 846 | arches, &set_architecture_string, |
b4a20239 AC |
847 | "Set architecture of target.", |
848 | &setlist); | |
9f60d481 | 849 | set_cmd_sfunc (c, set_architecture); |
b4a20239 AC |
850 | add_alias_cmd ("processor", "architecture", class_support, 1, &setlist); |
851 | /* Don't use set_from_show - need to print both auto/manual and | |
852 | current setting. */ | |
853 | add_cmd ("architecture", class_support, show_architecture, | |
854 | "Show the current target architecture", &showlist); | |
b4a20239 AC |
855 | } |
856 | } | |
857 | ||
858 | ||
fb6ecb0f AC |
859 | /* Initialize a gdbarch info to values that will be automatically |
860 | overridden. Note: Originally, this ``struct info'' was initialized | |
861 | using memset(0). Unfortunatly, that ran into problems, namely | |
862 | BFD_ENDIAN_BIG is zero. An explicit initialization function that | |
863 | can explicitly set each field to a well defined value is used. */ | |
864 | ||
865 | void | |
866 | gdbarch_info_init (struct gdbarch_info *info) | |
867 | { | |
868 | memset (info, 0, sizeof (struct gdbarch_info)); | |
428721aa | 869 | info->byte_order = BFD_ENDIAN_UNKNOWN; |
fb6ecb0f AC |
870 | } |
871 | ||
c0e8c252 AC |
872 | /* */ |
873 | ||
b4a20239 | 874 | extern initialize_file_ftype _initialize_gdbarch_utils; |
c0e8c252 AC |
875 | |
876 | void | |
b4a20239 | 877 | _initialize_gdbarch_utils (void) |
c0e8c252 | 878 | { |
b4a20239 AC |
879 | struct cmd_list_element *c; |
880 | c = add_set_enum_cmd ("endian", class_support, | |
881 | endian_enum, &set_endian_string, | |
882 | "Set endianness of target.", | |
883 | &setlist); | |
9f60d481 | 884 | set_cmd_sfunc (c, set_endian); |
b4a20239 AC |
885 | /* Don't use set_from_show - need to print both auto/manual and |
886 | current setting. */ | |
887 | add_cmd ("endian", class_support, show_endian, | |
888 | "Show the current byte-order", &showlist); | |
c0e8c252 | 889 | } |