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 | ||
f517ea4e | 270 | CORE_ADDR |
875e1767 | 271 | core_addr_identity (CORE_ADDR addr) |
f517ea4e PS |
272 | { |
273 | return addr; | |
274 | } | |
275 | ||
88c72b7d AC |
276 | int |
277 | no_op_reg_to_regnum (int reg) | |
278 | { | |
279 | return reg; | |
280 | } | |
281 | ||
c347ee3e MS |
282 | /* For use by frame_args_address and frame_locals_address. */ |
283 | CORE_ADDR | |
284 | default_frame_address (struct frame_info *fi) | |
285 | { | |
286 | return fi->frame; | |
287 | } | |
288 | ||
e02bc4cc DS |
289 | /* Default prepare_to_procced(). */ |
290 | int | |
291 | default_prepare_to_proceed (int select_it) | |
292 | { | |
293 | return 0; | |
294 | } | |
295 | ||
296 | /* Generic prepare_to_proceed(). This one should be suitable for most | |
297 | targets that support threads. */ | |
298 | int | |
299 | generic_prepare_to_proceed (int select_it) | |
300 | { | |
39f77062 | 301 | ptid_t wait_ptid; |
e02bc4cc DS |
302 | struct target_waitstatus wait_status; |
303 | ||
304 | /* Get the last target status returned by target_wait(). */ | |
39f77062 | 305 | get_last_target_status (&wait_ptid, &wait_status); |
e02bc4cc | 306 | |
8849f47d JL |
307 | /* Make sure we were stopped either at a breakpoint, or because |
308 | of a Ctrl-C. */ | |
e02bc4cc | 309 | if (wait_status.kind != TARGET_WAITKIND_STOPPED |
8849f47d JL |
310 | || (wait_status.value.sig != TARGET_SIGNAL_TRAP && |
311 | wait_status.value.sig != TARGET_SIGNAL_INT)) | |
e02bc4cc DS |
312 | { |
313 | return 0; | |
314 | } | |
315 | ||
39f77062 KB |
316 | if (!ptid_equal (wait_ptid, minus_one_ptid) |
317 | && !ptid_equal (inferior_ptid, wait_ptid)) | |
e02bc4cc DS |
318 | { |
319 | /* Switched over from WAIT_PID. */ | |
39f77062 | 320 | CORE_ADDR wait_pc = read_pc_pid (wait_ptid); |
e02bc4cc | 321 | |
8849f47d | 322 | if (wait_pc != read_pc ()) |
e02bc4cc DS |
323 | { |
324 | if (select_it) | |
325 | { | |
8849f47d | 326 | /* Switch back to WAIT_PID thread. */ |
39f77062 | 327 | inferior_ptid = wait_ptid; |
e02bc4cc DS |
328 | |
329 | /* FIXME: This stuff came from switch_to_thread() in | |
330 | thread.c (which should probably be a public function). */ | |
331 | flush_cached_frames (); | |
332 | registers_changed (); | |
333 | stop_pc = wait_pc; | |
0f7d239c | 334 | select_frame (get_current_frame ()); |
e02bc4cc | 335 | } |
8849f47d JL |
336 | /* We return 1 to indicate that there is a breakpoint here, |
337 | so we need to step over it before continuing to avoid | |
338 | hitting it straight away. */ | |
339 | if (breakpoint_here_p (wait_pc)) | |
340 | { | |
341 | return 1; | |
342 | } | |
e02bc4cc DS |
343 | } |
344 | } | |
345 | return 0; | |
346 | ||
347 | } | |
348 | ||
10312cc4 AC |
349 | void |
350 | init_frame_pc_noop (int fromleaf, struct frame_info *prev) | |
351 | { | |
352 | return; | |
353 | } | |
354 | ||
7824d2f2 AC |
355 | void |
356 | init_frame_pc_default (int fromleaf, struct frame_info *prev) | |
357 | { | |
358 | if (fromleaf) | |
359 | prev->pc = SAVED_PC_AFTER_CALL (prev->next); | |
360 | else if (prev->next != NULL) | |
361 | prev->pc = FRAME_SAVED_PC (prev->next); | |
362 | else | |
363 | prev->pc = read_pc (); | |
364 | } | |
365 | ||
a2cf933a EZ |
366 | void |
367 | default_elf_make_msymbol_special (asymbol *sym, struct minimal_symbol *msym) | |
368 | { | |
369 | return; | |
370 | } | |
371 | ||
372 | void | |
373 | default_coff_make_msymbol_special (int val, struct minimal_symbol *msym) | |
374 | { | |
375 | return; | |
376 | } | |
377 | ||
01fb7433 AC |
378 | int |
379 | cannot_register_not (int regnum) | |
380 | { | |
381 | return 0; | |
382 | } | |
39d4ef09 AC |
383 | |
384 | /* Legacy version of target_virtual_frame_pointer(). Assumes that | |
385 | there is an FP_REGNUM and that it is the same, cooked or raw. */ | |
386 | ||
387 | void | |
388 | legacy_virtual_frame_pointer (CORE_ADDR pc, | |
389 | int *frame_regnum, | |
390 | LONGEST *frame_offset) | |
391 | { | |
392 | gdb_assert (FP_REGNUM >= 0); | |
393 | *frame_regnum = FP_REGNUM; | |
394 | *frame_offset = 0; | |
395 | } | |
46cd78fb | 396 | |
b2e75d78 AC |
397 | /* Assume the world is sane, every register's virtual and real size |
398 | is identical. */ | |
46cd78fb AC |
399 | |
400 | int | |
b2e75d78 | 401 | generic_register_size (int regnum) |
46cd78fb AC |
402 | { |
403 | gdb_assert (regnum >= 0 && regnum < NUM_REGS + NUM_PSEUDO_REGS); | |
ef8570de | 404 | return TYPE_LENGTH (REGISTER_VIRTUAL_TYPE (regnum)); |
ce29138a MS |
405 | } |
406 | ||
d7bd68ca AC |
407 | #if !defined (IN_SIGTRAMP) |
408 | #if defined (SIGTRAMP_START) | |
409 | #define IN_SIGTRAMP(pc, name) \ | |
410 | ((pc) >= SIGTRAMP_START(pc) \ | |
411 | && (pc) < SIGTRAMP_END(pc) \ | |
412 | ) | |
413 | #else | |
414 | #define IN_SIGTRAMP(pc, name) \ | |
415 | (name && STREQ ("_sigtramp", name)) | |
416 | #endif | |
417 | #endif | |
418 | \f | |
419 | int | |
420 | legacy_pc_in_sigtramp (CORE_ADDR pc, char *name) | |
421 | { | |
422 | return IN_SIGTRAMP(pc, name); | |
423 | } | |
424 | ||
13d01224 AC |
425 | int |
426 | legacy_convert_register_p (int regnum) | |
427 | { | |
428 | return REGISTER_CONVERTIBLE (regnum); | |
429 | } | |
430 | ||
431 | void | |
432 | legacy_register_to_value (int regnum, struct type *type, | |
433 | char *from, char *to) | |
434 | { | |
435 | REGISTER_CONVERT_TO_VIRTUAL (regnum, type, from, to); | |
436 | } | |
437 | ||
438 | void | |
439 | legacy_value_to_register (struct type *type, int regnum, | |
440 | char *from, char *to) | |
441 | { | |
442 | REGISTER_CONVERT_TO_RAW (type, regnum, from, to); | |
443 | } | |
444 | ||
01fb7433 | 445 | \f |
b4a20239 AC |
446 | /* Functions to manipulate the endianness of the target. */ |
447 | ||
1ba607ad | 448 | /* ``target_byte_order'' is only used when non- multi-arch. |
afe64c1a AC |
449 | Multi-arch targets obtain the current byte order using the |
450 | TARGET_BYTE_ORDER gdbarch method. | |
451 | ||
452 | The choice of initial value is entirely arbitrary. During startup, | |
453 | the function initialize_current_architecture() updates this value | |
454 | based on default byte-order information extracted from BFD. */ | |
455 | int target_byte_order = BFD_ENDIAN_BIG; | |
b4a20239 AC |
456 | int target_byte_order_auto = 1; |
457 | ||
53904c9e AC |
458 | static const char endian_big[] = "big"; |
459 | static const char endian_little[] = "little"; | |
460 | static const char endian_auto[] = "auto"; | |
461 | static const char *endian_enum[] = | |
b4a20239 AC |
462 | { |
463 | endian_big, | |
464 | endian_little, | |
465 | endian_auto, | |
466 | NULL, | |
467 | }; | |
53904c9e | 468 | static const char *set_endian_string; |
b4a20239 AC |
469 | |
470 | /* Called by ``show endian''. */ | |
471 | ||
472 | static void | |
473 | show_endian (char *args, int from_tty) | |
474 | { | |
475 | if (TARGET_BYTE_ORDER_AUTO) | |
476 | printf_unfiltered ("The target endianness is set automatically (currently %s endian)\n", | |
d7449b42 | 477 | (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little")); |
b4a20239 AC |
478 | else |
479 | printf_unfiltered ("The target is assumed to be %s endian\n", | |
d7449b42 | 480 | (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little")); |
b4a20239 AC |
481 | } |
482 | ||
483 | static void | |
484 | set_endian (char *ignore_args, int from_tty, struct cmd_list_element *c) | |
485 | { | |
3fd3d7d2 | 486 | if (set_endian_string == endian_auto) |
b4a20239 AC |
487 | { |
488 | target_byte_order_auto = 1; | |
489 | } | |
490 | else if (set_endian_string == endian_little) | |
491 | { | |
b4a20239 AC |
492 | target_byte_order_auto = 0; |
493 | if (GDB_MULTI_ARCH) | |
494 | { | |
495 | struct gdbarch_info info; | |
fb6ecb0f | 496 | gdbarch_info_init (&info); |
778eb05e | 497 | info.byte_order = BFD_ENDIAN_LITTLE; |
16f33e29 AC |
498 | if (! gdbarch_update_p (info)) |
499 | { | |
500 | printf_unfiltered ("Little endian target not supported by GDB\n"); | |
501 | } | |
b4a20239 | 502 | } |
1ba607ad AC |
503 | else |
504 | { | |
778eb05e | 505 | target_byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad | 506 | } |
b4a20239 AC |
507 | } |
508 | else if (set_endian_string == endian_big) | |
509 | { | |
b4a20239 AC |
510 | target_byte_order_auto = 0; |
511 | if (GDB_MULTI_ARCH) | |
512 | { | |
513 | struct gdbarch_info info; | |
fb6ecb0f | 514 | gdbarch_info_init (&info); |
d7449b42 | 515 | info.byte_order = BFD_ENDIAN_BIG; |
16f33e29 AC |
516 | if (! gdbarch_update_p (info)) |
517 | { | |
518 | printf_unfiltered ("Big endian target not supported by GDB\n"); | |
519 | } | |
b4a20239 | 520 | } |
1ba607ad AC |
521 | else |
522 | { | |
d7449b42 | 523 | target_byte_order = BFD_ENDIAN_BIG; |
1ba607ad | 524 | } |
b4a20239 AC |
525 | } |
526 | else | |
8e65ff28 AC |
527 | internal_error (__FILE__, __LINE__, |
528 | "set_endian: bad value"); | |
b4a20239 AC |
529 | show_endian (NULL, from_tty); |
530 | } | |
531 | ||
532 | /* Set the endianness from a BFD. */ | |
533 | ||
534 | static void | |
535 | set_endian_from_file (bfd *abfd) | |
536 | { | |
3fd3d7d2 | 537 | int want; |
1ba607ad | 538 | if (GDB_MULTI_ARCH) |
8e65ff28 AC |
539 | internal_error (__FILE__, __LINE__, |
540 | "set_endian_from_file: not for multi-arch"); | |
3fd3d7d2 AC |
541 | if (bfd_big_endian (abfd)) |
542 | want = BFD_ENDIAN_BIG; | |
b4a20239 | 543 | else |
3fd3d7d2 AC |
544 | want = BFD_ENDIAN_LITTLE; |
545 | if (TARGET_BYTE_ORDER_AUTO) | |
546 | target_byte_order = want; | |
547 | else if (TARGET_BYTE_ORDER != want) | |
548 | warning ("%s endian file does not match %s endian target.", | |
549 | want == BFD_ENDIAN_BIG ? "big" : "little", | |
550 | TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little"); | |
b4a20239 AC |
551 | } |
552 | ||
553 | ||
554 | /* Functions to manipulate the architecture of the target */ | |
555 | ||
556 | enum set_arch { set_arch_auto, set_arch_manual }; | |
557 | ||
558 | int target_architecture_auto = 1; | |
559 | ||
53904c9e | 560 | const char *set_architecture_string; |
b4a20239 AC |
561 | |
562 | /* Old way of changing the current architecture. */ | |
563 | ||
564 | extern const struct bfd_arch_info bfd_default_arch_struct; | |
565 | const struct bfd_arch_info *target_architecture = &bfd_default_arch_struct; | |
566 | int (*target_architecture_hook) (const struct bfd_arch_info *ap); | |
567 | ||
568 | static int | |
569 | arch_ok (const struct bfd_arch_info *arch) | |
570 | { | |
571 | if (GDB_MULTI_ARCH) | |
8e65ff28 AC |
572 | internal_error (__FILE__, __LINE__, |
573 | "arch_ok: not multi-arched"); | |
b4a20239 AC |
574 | /* Should be performing the more basic check that the binary is |
575 | compatible with GDB. */ | |
576 | /* Check with the target that the architecture is valid. */ | |
577 | return (target_architecture_hook == NULL | |
578 | || target_architecture_hook (arch)); | |
579 | } | |
580 | ||
581 | static void | |
582 | set_arch (const struct bfd_arch_info *arch, | |
583 | enum set_arch type) | |
584 | { | |
585 | if (GDB_MULTI_ARCH) | |
8e65ff28 AC |
586 | internal_error (__FILE__, __LINE__, |
587 | "set_arch: not multi-arched"); | |
b4a20239 AC |
588 | switch (type) |
589 | { | |
590 | case set_arch_auto: | |
591 | if (!arch_ok (arch)) | |
592 | warning ("Target may not support %s architecture", | |
593 | arch->printable_name); | |
594 | target_architecture = arch; | |
595 | break; | |
596 | case set_arch_manual: | |
597 | if (!arch_ok (arch)) | |
598 | { | |
599 | printf_unfiltered ("Target does not support `%s' architecture.\n", | |
600 | arch->printable_name); | |
601 | } | |
602 | else | |
603 | { | |
604 | target_architecture_auto = 0; | |
605 | target_architecture = arch; | |
606 | } | |
607 | break; | |
608 | } | |
609 | if (gdbarch_debug) | |
4b9b3959 | 610 | gdbarch_dump (current_gdbarch, gdb_stdlog); |
b4a20239 AC |
611 | } |
612 | ||
613 | /* Set the architecture from arch/machine (deprecated) */ | |
614 | ||
615 | void | |
616 | set_architecture_from_arch_mach (enum bfd_architecture arch, | |
617 | unsigned long mach) | |
618 | { | |
619 | const struct bfd_arch_info *wanted = bfd_lookup_arch (arch, mach); | |
620 | if (GDB_MULTI_ARCH) | |
8e65ff28 AC |
621 | internal_error (__FILE__, __LINE__, |
622 | "set_architecture_from_arch_mach: not multi-arched"); | |
b4a20239 AC |
623 | if (wanted != NULL) |
624 | set_arch (wanted, set_arch_manual); | |
625 | else | |
8e65ff28 AC |
626 | internal_error (__FILE__, __LINE__, |
627 | "gdbarch: hardwired architecture/machine not recognized"); | |
b4a20239 AC |
628 | } |
629 | ||
630 | /* Set the architecture from a BFD (deprecated) */ | |
631 | ||
632 | static void | |
633 | set_architecture_from_file (bfd *abfd) | |
634 | { | |
635 | const struct bfd_arch_info *wanted = bfd_get_arch_info (abfd); | |
636 | if (GDB_MULTI_ARCH) | |
8e65ff28 AC |
637 | internal_error (__FILE__, __LINE__, |
638 | "set_architecture_from_file: not multi-arched"); | |
b4a20239 AC |
639 | if (target_architecture_auto) |
640 | { | |
641 | set_arch (wanted, set_arch_auto); | |
642 | } | |
643 | else if (wanted != target_architecture) | |
644 | { | |
645 | warning ("%s architecture file may be incompatible with %s target.", | |
646 | wanted->printable_name, | |
647 | target_architecture->printable_name); | |
648 | } | |
649 | } | |
650 | ||
651 | ||
652 | /* Called if the user enters ``show architecture'' without an | |
653 | argument. */ | |
654 | ||
655 | static void | |
656 | show_architecture (char *args, int from_tty) | |
657 | { | |
658 | const char *arch; | |
659 | arch = TARGET_ARCHITECTURE->printable_name; | |
660 | if (target_architecture_auto) | |
661 | printf_filtered ("The target architecture is set automatically (currently %s)\n", arch); | |
662 | else | |
663 | printf_filtered ("The target architecture is assumed to be %s\n", arch); | |
664 | } | |
665 | ||
666 | ||
667 | /* Called if the user enters ``set architecture'' with or without an | |
668 | argument. */ | |
669 | ||
670 | static void | |
671 | set_architecture (char *ignore_args, int from_tty, struct cmd_list_element *c) | |
672 | { | |
673 | if (strcmp (set_architecture_string, "auto") == 0) | |
674 | { | |
675 | target_architecture_auto = 1; | |
676 | } | |
677 | else if (GDB_MULTI_ARCH) | |
678 | { | |
679 | struct gdbarch_info info; | |
fb6ecb0f | 680 | gdbarch_info_init (&info); |
b4a20239 AC |
681 | info.bfd_arch_info = bfd_scan_arch (set_architecture_string); |
682 | if (info.bfd_arch_info == NULL) | |
8e65ff28 AC |
683 | internal_error (__FILE__, __LINE__, |
684 | "set_architecture: bfd_scan_arch failed"); | |
16f33e29 | 685 | if (gdbarch_update_p (info)) |
b4a20239 AC |
686 | target_architecture_auto = 0; |
687 | else | |
ec3d358c | 688 | printf_unfiltered ("Architecture `%s' not recognized.\n", |
b4a20239 AC |
689 | set_architecture_string); |
690 | } | |
691 | else | |
692 | { | |
693 | const struct bfd_arch_info *arch | |
694 | = bfd_scan_arch (set_architecture_string); | |
695 | if (arch == NULL) | |
8e65ff28 AC |
696 | internal_error (__FILE__, __LINE__, |
697 | "set_architecture: bfd_scan_arch failed"); | |
b4a20239 AC |
698 | set_arch (arch, set_arch_manual); |
699 | } | |
700 | show_architecture (NULL, from_tty); | |
701 | } | |
702 | ||
b7d6b182 | 703 | /* Set the dynamic target-system-dependent parameters (architecture, |
b4a20239 AC |
704 | byte-order) using information found in the BFD */ |
705 | ||
706 | void | |
fba45db2 | 707 | set_gdbarch_from_file (bfd *abfd) |
b4a20239 AC |
708 | { |
709 | if (GDB_MULTI_ARCH) | |
710 | { | |
711 | struct gdbarch_info info; | |
fb6ecb0f | 712 | gdbarch_info_init (&info); |
b4a20239 | 713 | info.abfd = abfd; |
16f33e29 | 714 | if (! gdbarch_update_p (info)) |
ec3d358c | 715 | error ("Architecture of file not recognized.\n"); |
b4a20239 AC |
716 | } |
717 | else | |
718 | { | |
719 | set_architecture_from_file (abfd); | |
720 | set_endian_from_file (abfd); | |
721 | } | |
722 | } | |
723 | ||
724 | /* Initialize the current architecture. Update the ``set | |
725 | architecture'' command so that it specifies a list of valid | |
726 | architectures. */ | |
727 | ||
1ba607ad AC |
728 | #ifdef DEFAULT_BFD_ARCH |
729 | extern const bfd_arch_info_type DEFAULT_BFD_ARCH; | |
730 | static const bfd_arch_info_type *default_bfd_arch = &DEFAULT_BFD_ARCH; | |
731 | #else | |
4b9b3959 | 732 | static const bfd_arch_info_type *default_bfd_arch; |
1ba607ad AC |
733 | #endif |
734 | ||
735 | #ifdef DEFAULT_BFD_VEC | |
736 | extern const bfd_target DEFAULT_BFD_VEC; | |
737 | static const bfd_target *default_bfd_vec = &DEFAULT_BFD_VEC; | |
738 | #else | |
739 | static const bfd_target *default_bfd_vec; | |
740 | #endif | |
741 | ||
b4a20239 AC |
742 | void |
743 | initialize_current_architecture (void) | |
744 | { | |
745 | const char **arches = gdbarch_printable_names (); | |
b4a20239 | 746 | |
1ba607ad AC |
747 | /* determine a default architecture and byte order. */ |
748 | struct gdbarch_info info; | |
fb6ecb0f | 749 | gdbarch_info_init (&info); |
1ba607ad AC |
750 | |
751 | /* Find a default architecture. */ | |
752 | if (info.bfd_arch_info == NULL | |
753 | && default_bfd_arch != NULL) | |
754 | info.bfd_arch_info = default_bfd_arch; | |
755 | if (info.bfd_arch_info == NULL) | |
b4a20239 | 756 | { |
1ba607ad AC |
757 | /* Choose the architecture by taking the first one |
758 | alphabetically. */ | |
759 | const char *chosen = arches[0]; | |
b4a20239 | 760 | const char **arch; |
b4a20239 AC |
761 | for (arch = arches; *arch != NULL; arch++) |
762 | { | |
b4a20239 AC |
763 | if (strcmp (*arch, chosen) < 0) |
764 | chosen = *arch; | |
765 | } | |
766 | if (chosen == NULL) | |
8e65ff28 AC |
767 | internal_error (__FILE__, __LINE__, |
768 | "initialize_current_architecture: No arch"); | |
b4a20239 AC |
769 | info.bfd_arch_info = bfd_scan_arch (chosen); |
770 | if (info.bfd_arch_info == NULL) | |
8e65ff28 AC |
771 | internal_error (__FILE__, __LINE__, |
772 | "initialize_current_architecture: Arch not found"); | |
1ba607ad AC |
773 | } |
774 | ||
afe64c1a | 775 | /* Take several guesses at a byte order. */ |
428721aa | 776 | if (info.byte_order == BFD_ENDIAN_UNKNOWN |
1ba607ad AC |
777 | && default_bfd_vec != NULL) |
778 | { | |
779 | /* Extract BFD's default vector's byte order. */ | |
780 | switch (default_bfd_vec->byteorder) | |
781 | { | |
782 | case BFD_ENDIAN_BIG: | |
d7449b42 | 783 | info.byte_order = BFD_ENDIAN_BIG; |
1ba607ad AC |
784 | break; |
785 | case BFD_ENDIAN_LITTLE: | |
778eb05e | 786 | info.byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad AC |
787 | break; |
788 | default: | |
789 | break; | |
790 | } | |
791 | } | |
428721aa | 792 | if (info.byte_order == BFD_ENDIAN_UNKNOWN) |
1ba607ad AC |
793 | { |
794 | /* look for ``*el-*'' in the target name. */ | |
795 | const char *chp; | |
796 | chp = strchr (target_name, '-'); | |
797 | if (chp != NULL | |
798 | && chp - 2 >= target_name | |
799 | && strncmp (chp - 2, "el", 2) == 0) | |
778eb05e | 800 | info.byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad | 801 | } |
428721aa | 802 | if (info.byte_order == BFD_ENDIAN_UNKNOWN) |
1ba607ad AC |
803 | { |
804 | /* Wire it to big-endian!!! */ | |
d7449b42 | 805 | info.byte_order = BFD_ENDIAN_BIG; |
1ba607ad AC |
806 | } |
807 | ||
808 | if (GDB_MULTI_ARCH) | |
809 | { | |
16f33e29 AC |
810 | if (! gdbarch_update_p (info)) |
811 | { | |
8e65ff28 AC |
812 | internal_error (__FILE__, __LINE__, |
813 | "initialize_current_architecture: Selection of initial architecture failed"); | |
16f33e29 | 814 | } |
b4a20239 | 815 | } |
ceaa8edf | 816 | else |
afe64c1a AC |
817 | { |
818 | /* If the multi-arch logic comes up with a byte-order (from BFD) | |
819 | use it for the non-multi-arch case. */ | |
820 | if (info.byte_order != BFD_ENDIAN_UNKNOWN) | |
821 | target_byte_order = info.byte_order; | |
822 | initialize_non_multiarch (); | |
823 | } | |
b4a20239 | 824 | |
1ba607ad AC |
825 | /* Create the ``set architecture'' command appending ``auto'' to the |
826 | list of architectures. */ | |
b4a20239 AC |
827 | { |
828 | struct cmd_list_element *c; | |
829 | /* Append ``auto''. */ | |
830 | int nr; | |
831 | for (nr = 0; arches[nr] != NULL; nr++); | |
832 | arches = xrealloc (arches, sizeof (char*) * (nr + 2)); | |
833 | arches[nr + 0] = "auto"; | |
834 | arches[nr + 1] = NULL; | |
835 | /* FIXME: add_set_enum_cmd() uses an array of ``char *'' instead | |
836 | of ``const char *''. We just happen to know that the casts are | |
837 | safe. */ | |
838 | c = add_set_enum_cmd ("architecture", class_support, | |
53904c9e | 839 | arches, &set_architecture_string, |
b4a20239 AC |
840 | "Set architecture of target.", |
841 | &setlist); | |
9f60d481 | 842 | set_cmd_sfunc (c, set_architecture); |
b4a20239 AC |
843 | add_alias_cmd ("processor", "architecture", class_support, 1, &setlist); |
844 | /* Don't use set_from_show - need to print both auto/manual and | |
845 | current setting. */ | |
846 | add_cmd ("architecture", class_support, show_architecture, | |
847 | "Show the current target architecture", &showlist); | |
b4a20239 AC |
848 | } |
849 | } | |
850 | ||
851 | ||
fb6ecb0f AC |
852 | /* Initialize a gdbarch info to values that will be automatically |
853 | overridden. Note: Originally, this ``struct info'' was initialized | |
854 | using memset(0). Unfortunatly, that ran into problems, namely | |
855 | BFD_ENDIAN_BIG is zero. An explicit initialization function that | |
856 | can explicitly set each field to a well defined value is used. */ | |
857 | ||
858 | void | |
859 | gdbarch_info_init (struct gdbarch_info *info) | |
860 | { | |
861 | memset (info, 0, sizeof (struct gdbarch_info)); | |
428721aa | 862 | info->byte_order = BFD_ENDIAN_UNKNOWN; |
fb6ecb0f AC |
863 | } |
864 | ||
c0e8c252 AC |
865 | /* */ |
866 | ||
b4a20239 | 867 | extern initialize_file_ftype _initialize_gdbarch_utils; |
c0e8c252 AC |
868 | |
869 | void | |
b4a20239 | 870 | _initialize_gdbarch_utils (void) |
c0e8c252 | 871 | { |
b4a20239 AC |
872 | struct cmd_list_element *c; |
873 | c = add_set_enum_cmd ("endian", class_support, | |
874 | endian_enum, &set_endian_string, | |
875 | "Set endianness of target.", | |
876 | &setlist); | |
9f60d481 | 877 | set_cmd_sfunc (c, set_endian); |
b4a20239 AC |
878 | /* Don't use set_from_show - need to print both auto/manual and |
879 | current setting. */ | |
880 | add_cmd ("endian", class_support, show_endian, | |
881 | "Show the current byte-order", &showlist); | |
c0e8c252 | 882 | } |