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. */ | |
c0e8c252 AC |
32 | #include "symtab.h" |
33 | #include "frame.h" | |
34 | #include "inferior.h" | |
35 | #include "breakpoint.h" | |
36 | #include "gdb_wait.h" | |
37 | #include "gdbcore.h" | |
38 | #include "gdbcmd.h" | |
39 | #include "target.h" | |
c0e8c252 | 40 | #include "annotate.h" |
c0e8c252 | 41 | #endif |
5f8a3188 | 42 | #include "gdb_string.h" |
fbec36e2 | 43 | #include "regcache.h" |
39d4ef09 | 44 | #include "gdb_assert.h" |
4182591f | 45 | #include "sim-regno.h" |
c0e8c252 | 46 | |
1ba607ad AC |
47 | #include "version.h" |
48 | ||
f0d4cc9e AC |
49 | #include "floatformat.h" |
50 | ||
c0e8c252 AC |
51 | /* Use the program counter to determine the contents and size |
52 | of a breakpoint instruction. If no target-dependent macro | |
53 | BREAKPOINT_FROM_PC has been defined to implement this function, | |
54 | assume that the breakpoint doesn't depend on the PC, and | |
55 | use the values of the BIG_BREAKPOINT and LITTLE_BREAKPOINT macros. | |
56 | Return a pointer to a string of bytes that encode a breakpoint | |
57 | instruction, stores the length of the string to *lenptr, | |
58 | and optionally adjust the pc to point to the correct memory location | |
59 | for inserting the breakpoint. */ | |
60 | ||
f4f9705a | 61 | const unsigned char * |
c0e8c252 AC |
62 | legacy_breakpoint_from_pc (CORE_ADDR * pcptr, int *lenptr) |
63 | { | |
64 | /* {BIG_,LITTLE_}BREAKPOINT is the sequence of bytes we insert for a | |
65 | breakpoint. On some machines, breakpoints are handled by the | |
66 | target environment and we don't have to worry about them here. */ | |
67 | #ifdef BIG_BREAKPOINT | |
d7449b42 | 68 | if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) |
c0e8c252 AC |
69 | { |
70 | static unsigned char big_break_insn[] = BIG_BREAKPOINT; | |
71 | *lenptr = sizeof (big_break_insn); | |
72 | return big_break_insn; | |
73 | } | |
74 | #endif | |
75 | #ifdef LITTLE_BREAKPOINT | |
d7449b42 | 76 | if (TARGET_BYTE_ORDER != BFD_ENDIAN_BIG) |
c0e8c252 AC |
77 | { |
78 | static unsigned char little_break_insn[] = LITTLE_BREAKPOINT; | |
79 | *lenptr = sizeof (little_break_insn); | |
80 | return little_break_insn; | |
81 | } | |
82 | #endif | |
83 | #ifdef BREAKPOINT | |
84 | { | |
85 | static unsigned char break_insn[] = BREAKPOINT; | |
86 | *lenptr = sizeof (break_insn); | |
87 | return break_insn; | |
88 | } | |
89 | #endif | |
90 | *lenptr = 0; | |
91 | return NULL; | |
92 | } | |
93 | ||
049ee0e4 AC |
94 | /* Implementation of extract return value that grubs around in the |
95 | register cache. */ | |
96 | void | |
97 | legacy_extract_return_value (struct type *type, struct regcache *regcache, | |
98 | char *valbuf) | |
99 | { | |
100 | char *registers = deprecated_grub_regcache_for_registers (regcache); | |
101 | DEPRECATED_EXTRACT_RETURN_VALUE (type, registers, valbuf); | |
102 | } | |
103 | ||
4182591f AC |
104 | int |
105 | legacy_register_sim_regno (int regnum) | |
106 | { | |
107 | /* Only makes sense to supply raw registers. */ | |
108 | gdb_assert (regnum >= 0 && regnum < NUM_REGS); | |
109 | /* NOTE: cagney/2002-05-13: The old code did it this way and it is | |
110 | suspected that some GDB/SIM combinations may rely on this | |
111 | behavour. The default should be one2one_register_sim_regno | |
112 | (below). */ | |
113 | if (REGISTER_NAME (regnum) != NULL | |
114 | && REGISTER_NAME (regnum)[0] != '\0') | |
115 | return regnum; | |
116 | else | |
117 | return LEGACY_SIM_REGNO_IGNORE; | |
118 | } | |
119 | ||
c0e8c252 AC |
120 | int |
121 | generic_frameless_function_invocation_not (struct frame_info *fi) | |
122 | { | |
123 | return 0; | |
124 | } | |
125 | ||
71a9f22e JB |
126 | int |
127 | generic_return_value_on_stack_not (struct type *type) | |
128 | { | |
129 | return 0; | |
130 | } | |
131 | ||
bdcd319a CV |
132 | CORE_ADDR |
133 | generic_skip_trampoline_code (CORE_ADDR pc) | |
134 | { | |
135 | return 0; | |
136 | } | |
137 | ||
68e9cc94 CV |
138 | int |
139 | generic_in_solib_call_trampoline (CORE_ADDR pc, char *name) | |
140 | { | |
141 | return 0; | |
142 | } | |
143 | ||
d50355b6 MS |
144 | int |
145 | generic_in_solib_return_trampoline (CORE_ADDR pc, char *name) | |
146 | { | |
147 | return 0; | |
148 | } | |
149 | ||
c12260ac CV |
150 | int |
151 | generic_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc) | |
152 | { | |
153 | return 0; | |
154 | } | |
155 | ||
fa88f677 | 156 | const char * |
c0e8c252 AC |
157 | legacy_register_name (int i) |
158 | { | |
159 | #ifdef REGISTER_NAMES | |
160 | static char *names[] = REGISTER_NAMES; | |
161 | if (i < 0 || i >= (sizeof (names) / sizeof (*names))) | |
162 | return NULL; | |
163 | else | |
164 | return names[i]; | |
165 | #else | |
8e65ff28 AC |
166 | internal_error (__FILE__, __LINE__, |
167 | "legacy_register_name: called."); | |
c0e8c252 AC |
168 | return NULL; |
169 | #endif | |
170 | } | |
171 | ||
172 | #if defined (CALL_DUMMY) | |
173 | LONGEST legacy_call_dummy_words[] = CALL_DUMMY; | |
174 | #else | |
175 | LONGEST legacy_call_dummy_words[1]; | |
176 | #endif | |
177 | int legacy_sizeof_call_dummy_words = sizeof (legacy_call_dummy_words); | |
178 | ||
179 | void | |
180 | generic_remote_translate_xfer_address (CORE_ADDR gdb_addr, int gdb_len, | |
181 | CORE_ADDR * rem_addr, int *rem_len) | |
182 | { | |
183 | *rem_addr = gdb_addr; | |
184 | *rem_len = gdb_len; | |
185 | } | |
186 | ||
dad41f9a AC |
187 | int |
188 | generic_prologue_frameless_p (CORE_ADDR ip) | |
189 | { | |
dad41f9a | 190 | return ip == SKIP_PROLOGUE (ip); |
dad41f9a AC |
191 | } |
192 | ||
2bf0cb65 EZ |
193 | /* New/multi-arched targets should use the correct gdbarch field |
194 | instead of using this global pointer. */ | |
195 | int | |
196 | legacy_print_insn (bfd_vma vma, disassemble_info *info) | |
197 | { | |
198 | return (*tm_print_insn) (vma, info); | |
199 | } | |
dad41f9a | 200 | |
3339cf8b AC |
201 | /* Helper functions for INNER_THAN */ |
202 | ||
203 | int | |
fba45db2 | 204 | core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs) |
3339cf8b AC |
205 | { |
206 | return (lhs < rhs); | |
207 | } | |
208 | ||
209 | int | |
fba45db2 | 210 | core_addr_greaterthan (CORE_ADDR lhs, CORE_ADDR rhs) |
3339cf8b AC |
211 | { |
212 | return (lhs > rhs); | |
213 | } | |
214 | ||
215 | ||
f0d4cc9e AC |
216 | /* Helper functions for TARGET_{FLOAT,DOUBLE}_FORMAT */ |
217 | ||
218 | const struct floatformat * | |
219 | default_float_format (struct gdbarch *gdbarch) | |
220 | { | |
221 | #if GDB_MULTI_ARCH | |
222 | int byte_order = gdbarch_byte_order (gdbarch); | |
223 | #else | |
224 | int byte_order = TARGET_BYTE_ORDER; | |
225 | #endif | |
226 | switch (byte_order) | |
227 | { | |
d7449b42 | 228 | case BFD_ENDIAN_BIG: |
f0d4cc9e | 229 | return &floatformat_ieee_single_big; |
778eb05e | 230 | case BFD_ENDIAN_LITTLE: |
f0d4cc9e AC |
231 | return &floatformat_ieee_single_little; |
232 | default: | |
8e65ff28 AC |
233 | internal_error (__FILE__, __LINE__, |
234 | "default_float_format: bad byte order"); | |
f0d4cc9e AC |
235 | } |
236 | } | |
237 | ||
238 | ||
239 | const struct floatformat * | |
240 | default_double_format (struct gdbarch *gdbarch) | |
241 | { | |
242 | #if GDB_MULTI_ARCH | |
243 | int byte_order = gdbarch_byte_order (gdbarch); | |
244 | #else | |
245 | int byte_order = TARGET_BYTE_ORDER; | |
246 | #endif | |
247 | switch (byte_order) | |
248 | { | |
d7449b42 | 249 | case BFD_ENDIAN_BIG: |
f0d4cc9e | 250 | return &floatformat_ieee_double_big; |
778eb05e | 251 | case BFD_ENDIAN_LITTLE: |
f0d4cc9e AC |
252 | return &floatformat_ieee_double_little; |
253 | default: | |
8e65ff28 AC |
254 | internal_error (__FILE__, __LINE__, |
255 | "default_double_format: bad byte order"); | |
f0d4cc9e AC |
256 | } |
257 | } | |
258 | ||
193e3b1a AC |
259 | /* Misc helper functions for targets. */ |
260 | ||
261 | int | |
fba45db2 | 262 | frame_num_args_unknown (struct frame_info *fi) |
193e3b1a AC |
263 | { |
264 | return -1; | |
265 | } | |
266 | ||
267 | ||
268 | int | |
fba45db2 | 269 | generic_register_convertible_not (int num) |
193e3b1a AC |
270 | { |
271 | return 0; | |
272 | } | |
273 | ||
b4a20239 | 274 | |
c8f9d51c JB |
275 | /* Under some ABI's that specify the `struct convention' for returning |
276 | structures by value, by the time we've returned from the function, | |
277 | the return value is sitting there in the caller's buffer, but GDB | |
278 | has no way to find the address of that buffer. | |
279 | ||
280 | On such architectures, use this function as your | |
281 | extract_struct_value_address method. When asked to a struct | |
282 | returned by value in this fashion, GDB will print a nice error | |
283 | message, instead of garbage. */ | |
284 | CORE_ADDR | |
285 | generic_cannot_extract_struct_value_address (char *dummy) | |
286 | { | |
287 | return 0; | |
288 | } | |
289 | ||
f517ea4e | 290 | CORE_ADDR |
875e1767 | 291 | core_addr_identity (CORE_ADDR addr) |
f517ea4e PS |
292 | { |
293 | return addr; | |
294 | } | |
295 | ||
88c72b7d AC |
296 | int |
297 | no_op_reg_to_regnum (int reg) | |
298 | { | |
299 | return reg; | |
300 | } | |
301 | ||
c347ee3e MS |
302 | /* For use by frame_args_address and frame_locals_address. */ |
303 | CORE_ADDR | |
304 | default_frame_address (struct frame_info *fi) | |
305 | { | |
306 | return fi->frame; | |
307 | } | |
308 | ||
e02bc4cc DS |
309 | /* Default prepare_to_procced(). */ |
310 | int | |
311 | default_prepare_to_proceed (int select_it) | |
312 | { | |
313 | return 0; | |
314 | } | |
315 | ||
316 | /* Generic prepare_to_proceed(). This one should be suitable for most | |
317 | targets that support threads. */ | |
318 | int | |
319 | generic_prepare_to_proceed (int select_it) | |
320 | { | |
39f77062 | 321 | ptid_t wait_ptid; |
e02bc4cc DS |
322 | struct target_waitstatus wait_status; |
323 | ||
324 | /* Get the last target status returned by target_wait(). */ | |
39f77062 | 325 | get_last_target_status (&wait_ptid, &wait_status); |
e02bc4cc | 326 | |
8849f47d JL |
327 | /* Make sure we were stopped either at a breakpoint, or because |
328 | of a Ctrl-C. */ | |
e02bc4cc | 329 | if (wait_status.kind != TARGET_WAITKIND_STOPPED |
8849f47d JL |
330 | || (wait_status.value.sig != TARGET_SIGNAL_TRAP && |
331 | wait_status.value.sig != TARGET_SIGNAL_INT)) | |
e02bc4cc DS |
332 | { |
333 | return 0; | |
334 | } | |
335 | ||
39f77062 KB |
336 | if (!ptid_equal (wait_ptid, minus_one_ptid) |
337 | && !ptid_equal (inferior_ptid, wait_ptid)) | |
e02bc4cc DS |
338 | { |
339 | /* Switched over from WAIT_PID. */ | |
39f77062 | 340 | CORE_ADDR wait_pc = read_pc_pid (wait_ptid); |
e02bc4cc | 341 | |
8849f47d | 342 | if (wait_pc != read_pc ()) |
e02bc4cc DS |
343 | { |
344 | if (select_it) | |
345 | { | |
8849f47d | 346 | /* Switch back to WAIT_PID thread. */ |
39f77062 | 347 | inferior_ptid = wait_ptid; |
e02bc4cc DS |
348 | |
349 | /* FIXME: This stuff came from switch_to_thread() in | |
350 | thread.c (which should probably be a public function). */ | |
351 | flush_cached_frames (); | |
352 | registers_changed (); | |
353 | stop_pc = wait_pc; | |
0f7d239c | 354 | select_frame (get_current_frame ()); |
e02bc4cc | 355 | } |
8849f47d JL |
356 | /* We return 1 to indicate that there is a breakpoint here, |
357 | so we need to step over it before continuing to avoid | |
358 | hitting it straight away. */ | |
359 | if (breakpoint_here_p (wait_pc)) | |
360 | { | |
361 | return 1; | |
362 | } | |
e02bc4cc DS |
363 | } |
364 | } | |
365 | return 0; | |
366 | ||
367 | } | |
368 | ||
10312cc4 AC |
369 | void |
370 | init_frame_pc_noop (int fromleaf, struct frame_info *prev) | |
371 | { | |
372 | return; | |
373 | } | |
374 | ||
7824d2f2 AC |
375 | void |
376 | init_frame_pc_default (int fromleaf, struct frame_info *prev) | |
377 | { | |
378 | if (fromleaf) | |
379 | prev->pc = SAVED_PC_AFTER_CALL (prev->next); | |
380 | else if (prev->next != NULL) | |
381 | prev->pc = FRAME_SAVED_PC (prev->next); | |
382 | else | |
383 | prev->pc = read_pc (); | |
384 | } | |
385 | ||
a2cf933a EZ |
386 | void |
387 | default_elf_make_msymbol_special (asymbol *sym, struct minimal_symbol *msym) | |
388 | { | |
389 | return; | |
390 | } | |
391 | ||
392 | void | |
393 | default_coff_make_msymbol_special (int val, struct minimal_symbol *msym) | |
394 | { | |
395 | return; | |
396 | } | |
397 | ||
01fb7433 AC |
398 | int |
399 | cannot_register_not (int regnum) | |
400 | { | |
401 | return 0; | |
402 | } | |
39d4ef09 AC |
403 | |
404 | /* Legacy version of target_virtual_frame_pointer(). Assumes that | |
405 | there is an FP_REGNUM and that it is the same, cooked or raw. */ | |
406 | ||
407 | void | |
408 | legacy_virtual_frame_pointer (CORE_ADDR pc, | |
409 | int *frame_regnum, | |
410 | LONGEST *frame_offset) | |
411 | { | |
412 | gdb_assert (FP_REGNUM >= 0); | |
413 | *frame_regnum = FP_REGNUM; | |
414 | *frame_offset = 0; | |
415 | } | |
46cd78fb | 416 | |
b2e75d78 AC |
417 | /* Assume the world is sane, every register's virtual and real size |
418 | is identical. */ | |
46cd78fb AC |
419 | |
420 | int | |
b2e75d78 | 421 | generic_register_size (int regnum) |
46cd78fb AC |
422 | { |
423 | gdb_assert (regnum >= 0 && regnum < NUM_REGS + NUM_PSEUDO_REGS); | |
ef8570de | 424 | return TYPE_LENGTH (REGISTER_VIRTUAL_TYPE (regnum)); |
ce29138a MS |
425 | } |
426 | ||
d7bd68ca AC |
427 | #if !defined (IN_SIGTRAMP) |
428 | #if defined (SIGTRAMP_START) | |
429 | #define IN_SIGTRAMP(pc, name) \ | |
430 | ((pc) >= SIGTRAMP_START(pc) \ | |
431 | && (pc) < SIGTRAMP_END(pc) \ | |
432 | ) | |
433 | #else | |
434 | #define IN_SIGTRAMP(pc, name) \ | |
435 | (name && STREQ ("_sigtramp", name)) | |
436 | #endif | |
437 | #endif | |
a7e3c2ad AC |
438 | |
439 | /* Assume all registers are adjacent. */ | |
440 | ||
441 | int | |
442 | generic_register_byte (int regnum) | |
443 | { | |
444 | int byte; | |
445 | int i; | |
446 | gdb_assert (regnum >= 0 && regnum < NUM_REGS + NUM_PSEUDO_REGS); | |
447 | byte = 0; | |
448 | for (i = 0; i < regnum; i++) | |
449 | { | |
450 | byte += TYPE_LENGTH (REGISTER_VIRTUAL_TYPE (i)); | |
451 | } | |
452 | return byte; | |
453 | } | |
454 | ||
d7bd68ca AC |
455 | \f |
456 | int | |
457 | legacy_pc_in_sigtramp (CORE_ADDR pc, char *name) | |
458 | { | |
459 | return IN_SIGTRAMP(pc, name); | |
460 | } | |
461 | ||
13d01224 AC |
462 | int |
463 | legacy_convert_register_p (int regnum) | |
464 | { | |
465 | return REGISTER_CONVERTIBLE (regnum); | |
466 | } | |
467 | ||
468 | void | |
469 | legacy_register_to_value (int regnum, struct type *type, | |
470 | char *from, char *to) | |
471 | { | |
472 | REGISTER_CONVERT_TO_VIRTUAL (regnum, type, from, to); | |
473 | } | |
474 | ||
475 | void | |
476 | legacy_value_to_register (struct type *type, int regnum, | |
477 | char *from, char *to) | |
478 | { | |
479 | REGISTER_CONVERT_TO_RAW (type, regnum, from, to); | |
480 | } | |
481 | ||
01fb7433 | 482 | \f |
b4a20239 AC |
483 | /* Functions to manipulate the endianness of the target. */ |
484 | ||
1ba607ad | 485 | /* ``target_byte_order'' is only used when non- multi-arch. |
afe64c1a AC |
486 | Multi-arch targets obtain the current byte order using the |
487 | TARGET_BYTE_ORDER gdbarch method. | |
488 | ||
489 | The choice of initial value is entirely arbitrary. During startup, | |
490 | the function initialize_current_architecture() updates this value | |
491 | based on default byte-order information extracted from BFD. */ | |
492 | int target_byte_order = BFD_ENDIAN_BIG; | |
b4a20239 AC |
493 | int target_byte_order_auto = 1; |
494 | ||
53904c9e AC |
495 | static const char endian_big[] = "big"; |
496 | static const char endian_little[] = "little"; | |
497 | static const char endian_auto[] = "auto"; | |
498 | static const char *endian_enum[] = | |
b4a20239 AC |
499 | { |
500 | endian_big, | |
501 | endian_little, | |
502 | endian_auto, | |
503 | NULL, | |
504 | }; | |
53904c9e | 505 | static const char *set_endian_string; |
b4a20239 AC |
506 | |
507 | /* Called by ``show endian''. */ | |
508 | ||
509 | static void | |
510 | show_endian (char *args, int from_tty) | |
511 | { | |
512 | if (TARGET_BYTE_ORDER_AUTO) | |
513 | printf_unfiltered ("The target endianness is set automatically (currently %s endian)\n", | |
d7449b42 | 514 | (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little")); |
b4a20239 AC |
515 | else |
516 | printf_unfiltered ("The target is assumed to be %s endian\n", | |
d7449b42 | 517 | (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little")); |
b4a20239 AC |
518 | } |
519 | ||
520 | static void | |
521 | set_endian (char *ignore_args, int from_tty, struct cmd_list_element *c) | |
522 | { | |
3fd3d7d2 | 523 | if (set_endian_string == endian_auto) |
b4a20239 AC |
524 | { |
525 | target_byte_order_auto = 1; | |
526 | } | |
527 | else if (set_endian_string == endian_little) | |
528 | { | |
b4a20239 AC |
529 | target_byte_order_auto = 0; |
530 | if (GDB_MULTI_ARCH) | |
531 | { | |
532 | struct gdbarch_info info; | |
fb6ecb0f | 533 | gdbarch_info_init (&info); |
778eb05e | 534 | info.byte_order = BFD_ENDIAN_LITTLE; |
16f33e29 AC |
535 | if (! gdbarch_update_p (info)) |
536 | { | |
537 | printf_unfiltered ("Little endian target not supported by GDB\n"); | |
538 | } | |
b4a20239 | 539 | } |
1ba607ad AC |
540 | else |
541 | { | |
778eb05e | 542 | target_byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad | 543 | } |
b4a20239 AC |
544 | } |
545 | else if (set_endian_string == endian_big) | |
546 | { | |
b4a20239 AC |
547 | target_byte_order_auto = 0; |
548 | if (GDB_MULTI_ARCH) | |
549 | { | |
550 | struct gdbarch_info info; | |
fb6ecb0f | 551 | gdbarch_info_init (&info); |
d7449b42 | 552 | info.byte_order = BFD_ENDIAN_BIG; |
16f33e29 AC |
553 | if (! gdbarch_update_p (info)) |
554 | { | |
555 | printf_unfiltered ("Big endian target not supported by GDB\n"); | |
556 | } | |
b4a20239 | 557 | } |
1ba607ad AC |
558 | else |
559 | { | |
d7449b42 | 560 | target_byte_order = BFD_ENDIAN_BIG; |
1ba607ad | 561 | } |
b4a20239 AC |
562 | } |
563 | else | |
8e65ff28 AC |
564 | internal_error (__FILE__, __LINE__, |
565 | "set_endian: bad value"); | |
b4a20239 AC |
566 | show_endian (NULL, from_tty); |
567 | } | |
568 | ||
569 | /* Set the endianness from a BFD. */ | |
570 | ||
571 | static void | |
572 | set_endian_from_file (bfd *abfd) | |
573 | { | |
3fd3d7d2 | 574 | int want; |
1ba607ad | 575 | if (GDB_MULTI_ARCH) |
8e65ff28 AC |
576 | internal_error (__FILE__, __LINE__, |
577 | "set_endian_from_file: not for multi-arch"); | |
3fd3d7d2 AC |
578 | if (bfd_big_endian (abfd)) |
579 | want = BFD_ENDIAN_BIG; | |
b4a20239 | 580 | else |
3fd3d7d2 AC |
581 | want = BFD_ENDIAN_LITTLE; |
582 | if (TARGET_BYTE_ORDER_AUTO) | |
583 | target_byte_order = want; | |
584 | else if (TARGET_BYTE_ORDER != want) | |
585 | warning ("%s endian file does not match %s endian target.", | |
586 | want == BFD_ENDIAN_BIG ? "big" : "little", | |
587 | TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little"); | |
b4a20239 AC |
588 | } |
589 | ||
590 | ||
591 | /* Functions to manipulate the architecture of the target */ | |
592 | ||
593 | enum set_arch { set_arch_auto, set_arch_manual }; | |
594 | ||
595 | int target_architecture_auto = 1; | |
596 | ||
53904c9e | 597 | const char *set_architecture_string; |
b4a20239 AC |
598 | |
599 | /* Old way of changing the current architecture. */ | |
600 | ||
601 | extern const struct bfd_arch_info bfd_default_arch_struct; | |
602 | const struct bfd_arch_info *target_architecture = &bfd_default_arch_struct; | |
603 | int (*target_architecture_hook) (const struct bfd_arch_info *ap); | |
604 | ||
605 | static int | |
606 | arch_ok (const struct bfd_arch_info *arch) | |
607 | { | |
608 | if (GDB_MULTI_ARCH) | |
8e65ff28 AC |
609 | internal_error (__FILE__, __LINE__, |
610 | "arch_ok: not multi-arched"); | |
b4a20239 AC |
611 | /* Should be performing the more basic check that the binary is |
612 | compatible with GDB. */ | |
613 | /* Check with the target that the architecture is valid. */ | |
614 | return (target_architecture_hook == NULL | |
615 | || target_architecture_hook (arch)); | |
616 | } | |
617 | ||
618 | static void | |
619 | set_arch (const struct bfd_arch_info *arch, | |
620 | enum set_arch type) | |
621 | { | |
622 | if (GDB_MULTI_ARCH) | |
8e65ff28 AC |
623 | internal_error (__FILE__, __LINE__, |
624 | "set_arch: not multi-arched"); | |
b4a20239 AC |
625 | switch (type) |
626 | { | |
627 | case set_arch_auto: | |
628 | if (!arch_ok (arch)) | |
629 | warning ("Target may not support %s architecture", | |
630 | arch->printable_name); | |
631 | target_architecture = arch; | |
632 | break; | |
633 | case set_arch_manual: | |
634 | if (!arch_ok (arch)) | |
635 | { | |
636 | printf_unfiltered ("Target does not support `%s' architecture.\n", | |
637 | arch->printable_name); | |
638 | } | |
639 | else | |
640 | { | |
641 | target_architecture_auto = 0; | |
642 | target_architecture = arch; | |
643 | } | |
644 | break; | |
645 | } | |
646 | if (gdbarch_debug) | |
4b9b3959 | 647 | gdbarch_dump (current_gdbarch, gdb_stdlog); |
b4a20239 AC |
648 | } |
649 | ||
650 | /* Set the architecture from arch/machine (deprecated) */ | |
651 | ||
652 | void | |
653 | set_architecture_from_arch_mach (enum bfd_architecture arch, | |
654 | unsigned long mach) | |
655 | { | |
656 | const struct bfd_arch_info *wanted = bfd_lookup_arch (arch, mach); | |
657 | if (GDB_MULTI_ARCH) | |
8e65ff28 AC |
658 | internal_error (__FILE__, __LINE__, |
659 | "set_architecture_from_arch_mach: not multi-arched"); | |
b4a20239 AC |
660 | if (wanted != NULL) |
661 | set_arch (wanted, set_arch_manual); | |
662 | else | |
8e65ff28 AC |
663 | internal_error (__FILE__, __LINE__, |
664 | "gdbarch: hardwired architecture/machine not recognized"); | |
b4a20239 AC |
665 | } |
666 | ||
667 | /* Set the architecture from a BFD (deprecated) */ | |
668 | ||
669 | static void | |
670 | set_architecture_from_file (bfd *abfd) | |
671 | { | |
672 | const struct bfd_arch_info *wanted = bfd_get_arch_info (abfd); | |
673 | if (GDB_MULTI_ARCH) | |
8e65ff28 AC |
674 | internal_error (__FILE__, __LINE__, |
675 | "set_architecture_from_file: not multi-arched"); | |
b4a20239 AC |
676 | if (target_architecture_auto) |
677 | { | |
678 | set_arch (wanted, set_arch_auto); | |
679 | } | |
680 | else if (wanted != target_architecture) | |
681 | { | |
682 | warning ("%s architecture file may be incompatible with %s target.", | |
683 | wanted->printable_name, | |
684 | target_architecture->printable_name); | |
685 | } | |
686 | } | |
687 | ||
688 | ||
689 | /* Called if the user enters ``show architecture'' without an | |
690 | argument. */ | |
691 | ||
692 | static void | |
693 | show_architecture (char *args, int from_tty) | |
694 | { | |
695 | const char *arch; | |
696 | arch = TARGET_ARCHITECTURE->printable_name; | |
697 | if (target_architecture_auto) | |
698 | printf_filtered ("The target architecture is set automatically (currently %s)\n", arch); | |
699 | else | |
700 | printf_filtered ("The target architecture is assumed to be %s\n", arch); | |
701 | } | |
702 | ||
703 | ||
704 | /* Called if the user enters ``set architecture'' with or without an | |
705 | argument. */ | |
706 | ||
707 | static void | |
708 | set_architecture (char *ignore_args, int from_tty, struct cmd_list_element *c) | |
709 | { | |
710 | if (strcmp (set_architecture_string, "auto") == 0) | |
711 | { | |
712 | target_architecture_auto = 1; | |
713 | } | |
714 | else if (GDB_MULTI_ARCH) | |
715 | { | |
716 | struct gdbarch_info info; | |
fb6ecb0f | 717 | gdbarch_info_init (&info); |
b4a20239 AC |
718 | info.bfd_arch_info = bfd_scan_arch (set_architecture_string); |
719 | if (info.bfd_arch_info == NULL) | |
8e65ff28 AC |
720 | internal_error (__FILE__, __LINE__, |
721 | "set_architecture: bfd_scan_arch failed"); | |
16f33e29 | 722 | if (gdbarch_update_p (info)) |
b4a20239 AC |
723 | target_architecture_auto = 0; |
724 | else | |
ec3d358c | 725 | printf_unfiltered ("Architecture `%s' not recognized.\n", |
b4a20239 AC |
726 | set_architecture_string); |
727 | } | |
728 | else | |
729 | { | |
730 | const struct bfd_arch_info *arch | |
731 | = bfd_scan_arch (set_architecture_string); | |
732 | if (arch == NULL) | |
8e65ff28 AC |
733 | internal_error (__FILE__, __LINE__, |
734 | "set_architecture: bfd_scan_arch failed"); | |
b4a20239 AC |
735 | set_arch (arch, set_arch_manual); |
736 | } | |
737 | show_architecture (NULL, from_tty); | |
738 | } | |
739 | ||
b7d6b182 | 740 | /* Set the dynamic target-system-dependent parameters (architecture, |
b4a20239 AC |
741 | byte-order) using information found in the BFD */ |
742 | ||
743 | void | |
fba45db2 | 744 | set_gdbarch_from_file (bfd *abfd) |
b4a20239 AC |
745 | { |
746 | if (GDB_MULTI_ARCH) | |
747 | { | |
748 | struct gdbarch_info info; | |
fb6ecb0f | 749 | gdbarch_info_init (&info); |
b4a20239 | 750 | info.abfd = abfd; |
16f33e29 | 751 | if (! gdbarch_update_p (info)) |
ec3d358c | 752 | error ("Architecture of file not recognized.\n"); |
b4a20239 AC |
753 | } |
754 | else | |
755 | { | |
756 | set_architecture_from_file (abfd); | |
757 | set_endian_from_file (abfd); | |
758 | } | |
759 | } | |
760 | ||
761 | /* Initialize the current architecture. Update the ``set | |
762 | architecture'' command so that it specifies a list of valid | |
763 | architectures. */ | |
764 | ||
1ba607ad AC |
765 | #ifdef DEFAULT_BFD_ARCH |
766 | extern const bfd_arch_info_type DEFAULT_BFD_ARCH; | |
767 | static const bfd_arch_info_type *default_bfd_arch = &DEFAULT_BFD_ARCH; | |
768 | #else | |
4b9b3959 | 769 | static const bfd_arch_info_type *default_bfd_arch; |
1ba607ad AC |
770 | #endif |
771 | ||
772 | #ifdef DEFAULT_BFD_VEC | |
773 | extern const bfd_target DEFAULT_BFD_VEC; | |
774 | static const bfd_target *default_bfd_vec = &DEFAULT_BFD_VEC; | |
775 | #else | |
776 | static const bfd_target *default_bfd_vec; | |
777 | #endif | |
778 | ||
b4a20239 AC |
779 | void |
780 | initialize_current_architecture (void) | |
781 | { | |
782 | const char **arches = gdbarch_printable_names (); | |
b4a20239 | 783 | |
1ba607ad AC |
784 | /* determine a default architecture and byte order. */ |
785 | struct gdbarch_info info; | |
fb6ecb0f | 786 | gdbarch_info_init (&info); |
1ba607ad AC |
787 | |
788 | /* Find a default architecture. */ | |
789 | if (info.bfd_arch_info == NULL | |
790 | && default_bfd_arch != NULL) | |
791 | info.bfd_arch_info = default_bfd_arch; | |
792 | if (info.bfd_arch_info == NULL) | |
b4a20239 | 793 | { |
1ba607ad AC |
794 | /* Choose the architecture by taking the first one |
795 | alphabetically. */ | |
796 | const char *chosen = arches[0]; | |
b4a20239 | 797 | const char **arch; |
b4a20239 AC |
798 | for (arch = arches; *arch != NULL; arch++) |
799 | { | |
b4a20239 AC |
800 | if (strcmp (*arch, chosen) < 0) |
801 | chosen = *arch; | |
802 | } | |
803 | if (chosen == NULL) | |
8e65ff28 AC |
804 | internal_error (__FILE__, __LINE__, |
805 | "initialize_current_architecture: No arch"); | |
b4a20239 AC |
806 | info.bfd_arch_info = bfd_scan_arch (chosen); |
807 | if (info.bfd_arch_info == NULL) | |
8e65ff28 AC |
808 | internal_error (__FILE__, __LINE__, |
809 | "initialize_current_architecture: Arch not found"); | |
1ba607ad AC |
810 | } |
811 | ||
afe64c1a | 812 | /* Take several guesses at a byte order. */ |
428721aa | 813 | if (info.byte_order == BFD_ENDIAN_UNKNOWN |
1ba607ad AC |
814 | && default_bfd_vec != NULL) |
815 | { | |
816 | /* Extract BFD's default vector's byte order. */ | |
817 | switch (default_bfd_vec->byteorder) | |
818 | { | |
819 | case BFD_ENDIAN_BIG: | |
d7449b42 | 820 | info.byte_order = BFD_ENDIAN_BIG; |
1ba607ad AC |
821 | break; |
822 | case BFD_ENDIAN_LITTLE: | |
778eb05e | 823 | info.byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad AC |
824 | break; |
825 | default: | |
826 | break; | |
827 | } | |
828 | } | |
428721aa | 829 | if (info.byte_order == BFD_ENDIAN_UNKNOWN) |
1ba607ad AC |
830 | { |
831 | /* look for ``*el-*'' in the target name. */ | |
832 | const char *chp; | |
833 | chp = strchr (target_name, '-'); | |
834 | if (chp != NULL | |
835 | && chp - 2 >= target_name | |
836 | && strncmp (chp - 2, "el", 2) == 0) | |
778eb05e | 837 | info.byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad | 838 | } |
428721aa | 839 | if (info.byte_order == BFD_ENDIAN_UNKNOWN) |
1ba607ad AC |
840 | { |
841 | /* Wire it to big-endian!!! */ | |
d7449b42 | 842 | info.byte_order = BFD_ENDIAN_BIG; |
1ba607ad AC |
843 | } |
844 | ||
845 | if (GDB_MULTI_ARCH) | |
846 | { | |
16f33e29 AC |
847 | if (! gdbarch_update_p (info)) |
848 | { | |
8e65ff28 AC |
849 | internal_error (__FILE__, __LINE__, |
850 | "initialize_current_architecture: Selection of initial architecture failed"); | |
16f33e29 | 851 | } |
b4a20239 | 852 | } |
ceaa8edf | 853 | else |
afe64c1a AC |
854 | { |
855 | /* If the multi-arch logic comes up with a byte-order (from BFD) | |
856 | use it for the non-multi-arch case. */ | |
857 | if (info.byte_order != BFD_ENDIAN_UNKNOWN) | |
858 | target_byte_order = info.byte_order; | |
859 | initialize_non_multiarch (); | |
860 | } | |
b4a20239 | 861 | |
1ba607ad AC |
862 | /* Create the ``set architecture'' command appending ``auto'' to the |
863 | list of architectures. */ | |
b4a20239 AC |
864 | { |
865 | struct cmd_list_element *c; | |
866 | /* Append ``auto''. */ | |
867 | int nr; | |
868 | for (nr = 0; arches[nr] != NULL; nr++); | |
869 | arches = xrealloc (arches, sizeof (char*) * (nr + 2)); | |
870 | arches[nr + 0] = "auto"; | |
871 | arches[nr + 1] = NULL; | |
872 | /* FIXME: add_set_enum_cmd() uses an array of ``char *'' instead | |
873 | of ``const char *''. We just happen to know that the casts are | |
874 | safe. */ | |
875 | c = add_set_enum_cmd ("architecture", class_support, | |
53904c9e | 876 | arches, &set_architecture_string, |
b4a20239 AC |
877 | "Set architecture of target.", |
878 | &setlist); | |
9f60d481 | 879 | set_cmd_sfunc (c, set_architecture); |
b4a20239 AC |
880 | add_alias_cmd ("processor", "architecture", class_support, 1, &setlist); |
881 | /* Don't use set_from_show - need to print both auto/manual and | |
882 | current setting. */ | |
883 | add_cmd ("architecture", class_support, show_architecture, | |
884 | "Show the current target architecture", &showlist); | |
b4a20239 AC |
885 | } |
886 | } | |
887 | ||
888 | ||
fb6ecb0f AC |
889 | /* Initialize a gdbarch info to values that will be automatically |
890 | overridden. Note: Originally, this ``struct info'' was initialized | |
891 | using memset(0). Unfortunatly, that ran into problems, namely | |
892 | BFD_ENDIAN_BIG is zero. An explicit initialization function that | |
893 | can explicitly set each field to a well defined value is used. */ | |
894 | ||
895 | void | |
896 | gdbarch_info_init (struct gdbarch_info *info) | |
897 | { | |
898 | memset (info, 0, sizeof (struct gdbarch_info)); | |
428721aa | 899 | info->byte_order = BFD_ENDIAN_UNKNOWN; |
fb6ecb0f AC |
900 | } |
901 | ||
c0e8c252 AC |
902 | /* */ |
903 | ||
b4a20239 | 904 | extern initialize_file_ftype _initialize_gdbarch_utils; |
c0e8c252 AC |
905 | |
906 | void | |
b4a20239 | 907 | _initialize_gdbarch_utils (void) |
c0e8c252 | 908 | { |
b4a20239 AC |
909 | struct cmd_list_element *c; |
910 | c = add_set_enum_cmd ("endian", class_support, | |
911 | endian_enum, &set_endian_string, | |
912 | "Set endianness of target.", | |
913 | &setlist); | |
9f60d481 | 914 | set_cmd_sfunc (c, set_endian); |
b4a20239 AC |
915 | /* Don't use set_from_show - need to print both auto/manual and |
916 | current setting. */ | |
917 | add_cmd ("endian", class_support, show_endian, | |
918 | "Show the current byte-order", &showlist); | |
c0e8c252 | 919 | } |