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" |
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 | ||
4182591f AC |
94 | int |
95 | legacy_register_sim_regno (int regnum) | |
96 | { | |
97 | /* Only makes sense to supply raw registers. */ | |
98 | gdb_assert (regnum >= 0 && regnum < NUM_REGS); | |
99 | /* NOTE: cagney/2002-05-13: The old code did it this way and it is | |
100 | suspected that some GDB/SIM combinations may rely on this | |
101 | behavour. The default should be one2one_register_sim_regno | |
102 | (below). */ | |
103 | if (REGISTER_NAME (regnum) != NULL | |
104 | && REGISTER_NAME (regnum)[0] != '\0') | |
105 | return regnum; | |
106 | else | |
107 | return LEGACY_SIM_REGNO_IGNORE; | |
108 | } | |
109 | ||
c0e8c252 AC |
110 | int |
111 | generic_frameless_function_invocation_not (struct frame_info *fi) | |
112 | { | |
113 | return 0; | |
114 | } | |
115 | ||
71a9f22e JB |
116 | int |
117 | generic_return_value_on_stack_not (struct type *type) | |
118 | { | |
119 | return 0; | |
120 | } | |
121 | ||
bdcd319a CV |
122 | CORE_ADDR |
123 | generic_skip_trampoline_code (CORE_ADDR pc) | |
124 | { | |
125 | return 0; | |
126 | } | |
127 | ||
68e9cc94 CV |
128 | int |
129 | generic_in_solib_call_trampoline (CORE_ADDR pc, char *name) | |
130 | { | |
131 | return 0; | |
132 | } | |
133 | ||
c12260ac CV |
134 | int |
135 | generic_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc) | |
136 | { | |
137 | return 0; | |
138 | } | |
139 | ||
fa88f677 | 140 | const char * |
c0e8c252 AC |
141 | legacy_register_name (int i) |
142 | { | |
143 | #ifdef REGISTER_NAMES | |
144 | static char *names[] = REGISTER_NAMES; | |
145 | if (i < 0 || i >= (sizeof (names) / sizeof (*names))) | |
146 | return NULL; | |
147 | else | |
148 | return names[i]; | |
149 | #else | |
8e65ff28 AC |
150 | internal_error (__FILE__, __LINE__, |
151 | "legacy_register_name: called."); | |
c0e8c252 AC |
152 | return NULL; |
153 | #endif | |
154 | } | |
155 | ||
156 | #if defined (CALL_DUMMY) | |
157 | LONGEST legacy_call_dummy_words[] = CALL_DUMMY; | |
158 | #else | |
159 | LONGEST legacy_call_dummy_words[1]; | |
160 | #endif | |
161 | int legacy_sizeof_call_dummy_words = sizeof (legacy_call_dummy_words); | |
162 | ||
163 | void | |
164 | generic_remote_translate_xfer_address (CORE_ADDR gdb_addr, int gdb_len, | |
165 | CORE_ADDR * rem_addr, int *rem_len) | |
166 | { | |
167 | *rem_addr = gdb_addr; | |
168 | *rem_len = gdb_len; | |
169 | } | |
170 | ||
dad41f9a AC |
171 | int |
172 | generic_prologue_frameless_p (CORE_ADDR ip) | |
173 | { | |
dad41f9a | 174 | return ip == SKIP_PROLOGUE (ip); |
dad41f9a AC |
175 | } |
176 | ||
2bf0cb65 EZ |
177 | /* New/multi-arched targets should use the correct gdbarch field |
178 | instead of using this global pointer. */ | |
179 | int | |
180 | legacy_print_insn (bfd_vma vma, disassemble_info *info) | |
181 | { | |
182 | return (*tm_print_insn) (vma, info); | |
183 | } | |
dad41f9a | 184 | |
3339cf8b AC |
185 | /* Helper functions for INNER_THAN */ |
186 | ||
187 | int | |
fba45db2 | 188 | core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs) |
3339cf8b AC |
189 | { |
190 | return (lhs < rhs); | |
191 | } | |
192 | ||
193 | int | |
fba45db2 | 194 | core_addr_greaterthan (CORE_ADDR lhs, CORE_ADDR rhs) |
3339cf8b AC |
195 | { |
196 | return (lhs > rhs); | |
197 | } | |
198 | ||
199 | ||
f0d4cc9e AC |
200 | /* Helper functions for TARGET_{FLOAT,DOUBLE}_FORMAT */ |
201 | ||
202 | const struct floatformat * | |
203 | default_float_format (struct gdbarch *gdbarch) | |
204 | { | |
205 | #if GDB_MULTI_ARCH | |
206 | int byte_order = gdbarch_byte_order (gdbarch); | |
207 | #else | |
208 | int byte_order = TARGET_BYTE_ORDER; | |
209 | #endif | |
210 | switch (byte_order) | |
211 | { | |
d7449b42 | 212 | case BFD_ENDIAN_BIG: |
f0d4cc9e | 213 | return &floatformat_ieee_single_big; |
778eb05e | 214 | case BFD_ENDIAN_LITTLE: |
f0d4cc9e AC |
215 | return &floatformat_ieee_single_little; |
216 | default: | |
8e65ff28 AC |
217 | internal_error (__FILE__, __LINE__, |
218 | "default_float_format: bad byte order"); | |
f0d4cc9e AC |
219 | } |
220 | } | |
221 | ||
222 | ||
223 | const struct floatformat * | |
224 | default_double_format (struct gdbarch *gdbarch) | |
225 | { | |
226 | #if GDB_MULTI_ARCH | |
227 | int byte_order = gdbarch_byte_order (gdbarch); | |
228 | #else | |
229 | int byte_order = TARGET_BYTE_ORDER; | |
230 | #endif | |
231 | switch (byte_order) | |
232 | { | |
d7449b42 | 233 | case BFD_ENDIAN_BIG: |
f0d4cc9e | 234 | return &floatformat_ieee_double_big; |
778eb05e | 235 | case BFD_ENDIAN_LITTLE: |
f0d4cc9e AC |
236 | return &floatformat_ieee_double_little; |
237 | default: | |
8e65ff28 AC |
238 | internal_error (__FILE__, __LINE__, |
239 | "default_double_format: bad byte order"); | |
f0d4cc9e AC |
240 | } |
241 | } | |
242 | ||
5e74b15c | 243 | void |
d855c300 AC |
244 | default_print_float_info (struct gdbarch *gdbarch, struct ui_file *file, |
245 | struct frame_info *frame) | |
5e74b15c RE |
246 | { |
247 | #ifdef FLOAT_INFO | |
248 | #if GDB_MULTI_ARCH > GDB_MULTI_ARCH_PARTIAL | |
249 | #error "FLOAT_INFO defined in multi-arch" | |
250 | #endif | |
251 | FLOAT_INFO; | |
252 | #else | |
d855c300 AC |
253 | fprintf_filtered (file, "\ |
254 | No floating point info available for this processor.\n"); | |
5e74b15c RE |
255 | #endif |
256 | } | |
257 | ||
193e3b1a AC |
258 | /* Misc helper functions for targets. */ |
259 | ||
260 | int | |
fba45db2 | 261 | frame_num_args_unknown (struct frame_info *fi) |
193e3b1a AC |
262 | { |
263 | return -1; | |
264 | } | |
265 | ||
266 | ||
267 | int | |
fba45db2 | 268 | generic_register_convertible_not (int num) |
193e3b1a AC |
269 | { |
270 | return 0; | |
271 | } | |
272 | ||
b4a20239 | 273 | |
c8f9d51c JB |
274 | /* Under some ABI's that specify the `struct convention' for returning |
275 | structures by value, by the time we've returned from the function, | |
276 | the return value is sitting there in the caller's buffer, but GDB | |
277 | has no way to find the address of that buffer. | |
278 | ||
279 | On such architectures, use this function as your | |
280 | extract_struct_value_address method. When asked to a struct | |
281 | returned by value in this fashion, GDB will print a nice error | |
282 | message, instead of garbage. */ | |
283 | CORE_ADDR | |
284 | generic_cannot_extract_struct_value_address (char *dummy) | |
285 | { | |
286 | return 0; | |
287 | } | |
288 | ||
f517ea4e | 289 | CORE_ADDR |
875e1767 | 290 | core_addr_identity (CORE_ADDR addr) |
f517ea4e PS |
291 | { |
292 | return addr; | |
293 | } | |
294 | ||
88c72b7d AC |
295 | int |
296 | no_op_reg_to_regnum (int reg) | |
297 | { | |
298 | return reg; | |
299 | } | |
300 | ||
c347ee3e MS |
301 | /* For use by frame_args_address and frame_locals_address. */ |
302 | CORE_ADDR | |
303 | default_frame_address (struct frame_info *fi) | |
304 | { | |
305 | return fi->frame; | |
306 | } | |
307 | ||
e02bc4cc DS |
308 | /* Default prepare_to_procced(). */ |
309 | int | |
310 | default_prepare_to_proceed (int select_it) | |
311 | { | |
312 | return 0; | |
313 | } | |
314 | ||
315 | /* Generic prepare_to_proceed(). This one should be suitable for most | |
316 | targets that support threads. */ | |
317 | int | |
318 | generic_prepare_to_proceed (int select_it) | |
319 | { | |
39f77062 | 320 | ptid_t wait_ptid; |
e02bc4cc DS |
321 | struct target_waitstatus wait_status; |
322 | ||
323 | /* Get the last target status returned by target_wait(). */ | |
39f77062 | 324 | get_last_target_status (&wait_ptid, &wait_status); |
e02bc4cc | 325 | |
8849f47d JL |
326 | /* Make sure we were stopped either at a breakpoint, or because |
327 | of a Ctrl-C. */ | |
e02bc4cc | 328 | if (wait_status.kind != TARGET_WAITKIND_STOPPED |
8849f47d JL |
329 | || (wait_status.value.sig != TARGET_SIGNAL_TRAP && |
330 | wait_status.value.sig != TARGET_SIGNAL_INT)) | |
e02bc4cc DS |
331 | { |
332 | return 0; | |
333 | } | |
334 | ||
39f77062 KB |
335 | if (!ptid_equal (wait_ptid, minus_one_ptid) |
336 | && !ptid_equal (inferior_ptid, wait_ptid)) | |
e02bc4cc DS |
337 | { |
338 | /* Switched over from WAIT_PID. */ | |
39f77062 | 339 | CORE_ADDR wait_pc = read_pc_pid (wait_ptid); |
e02bc4cc | 340 | |
8849f47d | 341 | if (wait_pc != read_pc ()) |
e02bc4cc DS |
342 | { |
343 | if (select_it) | |
344 | { | |
8849f47d | 345 | /* Switch back to WAIT_PID thread. */ |
39f77062 | 346 | inferior_ptid = wait_ptid; |
e02bc4cc DS |
347 | |
348 | /* FIXME: This stuff came from switch_to_thread() in | |
349 | thread.c (which should probably be a public function). */ | |
350 | flush_cached_frames (); | |
351 | registers_changed (); | |
352 | stop_pc = wait_pc; | |
0f7d239c | 353 | select_frame (get_current_frame ()); |
e02bc4cc | 354 | } |
8849f47d JL |
355 | /* We return 1 to indicate that there is a breakpoint here, |
356 | so we need to step over it before continuing to avoid | |
357 | hitting it straight away. */ | |
358 | if (breakpoint_here_p (wait_pc)) | |
359 | { | |
360 | return 1; | |
361 | } | |
e02bc4cc DS |
362 | } |
363 | } | |
364 | return 0; | |
365 | ||
366 | } | |
367 | ||
10312cc4 AC |
368 | void |
369 | init_frame_pc_noop (int fromleaf, struct frame_info *prev) | |
370 | { | |
371 | return; | |
372 | } | |
373 | ||
7824d2f2 AC |
374 | void |
375 | init_frame_pc_default (int fromleaf, struct frame_info *prev) | |
376 | { | |
377 | if (fromleaf) | |
378 | prev->pc = SAVED_PC_AFTER_CALL (prev->next); | |
379 | else if (prev->next != NULL) | |
380 | prev->pc = FRAME_SAVED_PC (prev->next); | |
381 | else | |
382 | prev->pc = read_pc (); | |
383 | } | |
384 | ||
a2cf933a EZ |
385 | void |
386 | default_elf_make_msymbol_special (asymbol *sym, struct minimal_symbol *msym) | |
387 | { | |
388 | return; | |
389 | } | |
390 | ||
391 | void | |
392 | default_coff_make_msymbol_special (int val, struct minimal_symbol *msym) | |
393 | { | |
394 | return; | |
395 | } | |
396 | ||
01fb7433 AC |
397 | int |
398 | cannot_register_not (int regnum) | |
399 | { | |
400 | return 0; | |
401 | } | |
39d4ef09 AC |
402 | |
403 | /* Legacy version of target_virtual_frame_pointer(). Assumes that | |
404 | there is an FP_REGNUM and that it is the same, cooked or raw. */ | |
405 | ||
406 | void | |
407 | legacy_virtual_frame_pointer (CORE_ADDR pc, | |
408 | int *frame_regnum, | |
409 | LONGEST *frame_offset) | |
410 | { | |
411 | gdb_assert (FP_REGNUM >= 0); | |
412 | *frame_regnum = FP_REGNUM; | |
413 | *frame_offset = 0; | |
414 | } | |
46cd78fb | 415 | |
b2e75d78 AC |
416 | /* Assume the world is sane, every register's virtual and real size |
417 | is identical. */ | |
46cd78fb AC |
418 | |
419 | int | |
b2e75d78 | 420 | generic_register_size (int regnum) |
46cd78fb AC |
421 | { |
422 | gdb_assert (regnum >= 0 && regnum < NUM_REGS + NUM_PSEUDO_REGS); | |
ef8570de | 423 | return TYPE_LENGTH (REGISTER_VIRTUAL_TYPE (regnum)); |
ce29138a MS |
424 | } |
425 | ||
d7bd68ca AC |
426 | #if !defined (IN_SIGTRAMP) |
427 | #if defined (SIGTRAMP_START) | |
428 | #define IN_SIGTRAMP(pc, name) \ | |
429 | ((pc) >= SIGTRAMP_START(pc) \ | |
430 | && (pc) < SIGTRAMP_END(pc) \ | |
431 | ) | |
432 | #else | |
433 | #define IN_SIGTRAMP(pc, name) \ | |
434 | (name && STREQ ("_sigtramp", name)) | |
435 | #endif | |
436 | #endif | |
437 | \f | |
438 | int | |
439 | legacy_pc_in_sigtramp (CORE_ADDR pc, char *name) | |
440 | { | |
441 | return IN_SIGTRAMP(pc, name); | |
442 | } | |
443 | ||
13d01224 AC |
444 | int |
445 | legacy_convert_register_p (int regnum) | |
446 | { | |
447 | return REGISTER_CONVERTIBLE (regnum); | |
448 | } | |
449 | ||
450 | void | |
451 | legacy_register_to_value (int regnum, struct type *type, | |
452 | char *from, char *to) | |
453 | { | |
454 | REGISTER_CONVERT_TO_VIRTUAL (regnum, type, from, to); | |
455 | } | |
456 | ||
457 | void | |
458 | legacy_value_to_register (struct type *type, int regnum, | |
459 | char *from, char *to) | |
460 | { | |
461 | REGISTER_CONVERT_TO_RAW (type, regnum, from, to); | |
462 | } | |
463 | ||
01fb7433 | 464 | \f |
b4a20239 AC |
465 | /* Functions to manipulate the endianness of the target. */ |
466 | ||
1ba607ad | 467 | /* ``target_byte_order'' is only used when non- multi-arch. |
afe64c1a AC |
468 | Multi-arch targets obtain the current byte order using the |
469 | TARGET_BYTE_ORDER gdbarch method. | |
470 | ||
471 | The choice of initial value is entirely arbitrary. During startup, | |
472 | the function initialize_current_architecture() updates this value | |
473 | based on default byte-order information extracted from BFD. */ | |
474 | int target_byte_order = BFD_ENDIAN_BIG; | |
b4a20239 AC |
475 | int target_byte_order_auto = 1; |
476 | ||
53904c9e AC |
477 | static const char endian_big[] = "big"; |
478 | static const char endian_little[] = "little"; | |
479 | static const char endian_auto[] = "auto"; | |
480 | static const char *endian_enum[] = | |
b4a20239 AC |
481 | { |
482 | endian_big, | |
483 | endian_little, | |
484 | endian_auto, | |
485 | NULL, | |
486 | }; | |
53904c9e | 487 | static const char *set_endian_string; |
b4a20239 AC |
488 | |
489 | /* Called by ``show endian''. */ | |
490 | ||
491 | static void | |
492 | show_endian (char *args, int from_tty) | |
493 | { | |
494 | if (TARGET_BYTE_ORDER_AUTO) | |
495 | printf_unfiltered ("The target endianness is set automatically (currently %s endian)\n", | |
d7449b42 | 496 | (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little")); |
b4a20239 AC |
497 | else |
498 | printf_unfiltered ("The target is assumed to be %s endian\n", | |
d7449b42 | 499 | (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little")); |
b4a20239 AC |
500 | } |
501 | ||
502 | static void | |
503 | set_endian (char *ignore_args, int from_tty, struct cmd_list_element *c) | |
504 | { | |
3fd3d7d2 | 505 | if (set_endian_string == endian_auto) |
b4a20239 AC |
506 | { |
507 | target_byte_order_auto = 1; | |
508 | } | |
509 | else if (set_endian_string == endian_little) | |
510 | { | |
b4a20239 AC |
511 | target_byte_order_auto = 0; |
512 | if (GDB_MULTI_ARCH) | |
513 | { | |
514 | struct gdbarch_info info; | |
fb6ecb0f | 515 | gdbarch_info_init (&info); |
778eb05e | 516 | info.byte_order = BFD_ENDIAN_LITTLE; |
16f33e29 AC |
517 | if (! gdbarch_update_p (info)) |
518 | { | |
519 | printf_unfiltered ("Little endian target not supported by GDB\n"); | |
520 | } | |
b4a20239 | 521 | } |
1ba607ad AC |
522 | else |
523 | { | |
778eb05e | 524 | target_byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad | 525 | } |
b4a20239 AC |
526 | } |
527 | else if (set_endian_string == endian_big) | |
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); |
d7449b42 | 534 | info.byte_order = BFD_ENDIAN_BIG; |
16f33e29 AC |
535 | if (! gdbarch_update_p (info)) |
536 | { | |
537 | printf_unfiltered ("Big endian target not supported by GDB\n"); | |
538 | } | |
b4a20239 | 539 | } |
1ba607ad AC |
540 | else |
541 | { | |
d7449b42 | 542 | target_byte_order = BFD_ENDIAN_BIG; |
1ba607ad | 543 | } |
b4a20239 AC |
544 | } |
545 | else | |
8e65ff28 AC |
546 | internal_error (__FILE__, __LINE__, |
547 | "set_endian: bad value"); | |
b4a20239 AC |
548 | show_endian (NULL, from_tty); |
549 | } | |
550 | ||
551 | /* Set the endianness from a BFD. */ | |
552 | ||
553 | static void | |
554 | set_endian_from_file (bfd *abfd) | |
555 | { | |
3fd3d7d2 | 556 | int want; |
1ba607ad | 557 | if (GDB_MULTI_ARCH) |
8e65ff28 AC |
558 | internal_error (__FILE__, __LINE__, |
559 | "set_endian_from_file: not for multi-arch"); | |
3fd3d7d2 AC |
560 | if (bfd_big_endian (abfd)) |
561 | want = BFD_ENDIAN_BIG; | |
b4a20239 | 562 | else |
3fd3d7d2 AC |
563 | want = BFD_ENDIAN_LITTLE; |
564 | if (TARGET_BYTE_ORDER_AUTO) | |
565 | target_byte_order = want; | |
566 | else if (TARGET_BYTE_ORDER != want) | |
567 | warning ("%s endian file does not match %s endian target.", | |
568 | want == BFD_ENDIAN_BIG ? "big" : "little", | |
569 | TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little"); | |
b4a20239 AC |
570 | } |
571 | ||
572 | ||
573 | /* Functions to manipulate the architecture of the target */ | |
574 | ||
575 | enum set_arch { set_arch_auto, set_arch_manual }; | |
576 | ||
577 | int target_architecture_auto = 1; | |
578 | ||
53904c9e | 579 | const char *set_architecture_string; |
b4a20239 AC |
580 | |
581 | /* Old way of changing the current architecture. */ | |
582 | ||
583 | extern const struct bfd_arch_info bfd_default_arch_struct; | |
584 | const struct bfd_arch_info *target_architecture = &bfd_default_arch_struct; | |
585 | int (*target_architecture_hook) (const struct bfd_arch_info *ap); | |
586 | ||
587 | static int | |
588 | arch_ok (const struct bfd_arch_info *arch) | |
589 | { | |
590 | if (GDB_MULTI_ARCH) | |
8e65ff28 AC |
591 | internal_error (__FILE__, __LINE__, |
592 | "arch_ok: not multi-arched"); | |
b4a20239 AC |
593 | /* Should be performing the more basic check that the binary is |
594 | compatible with GDB. */ | |
595 | /* Check with the target that the architecture is valid. */ | |
596 | return (target_architecture_hook == NULL | |
597 | || target_architecture_hook (arch)); | |
598 | } | |
599 | ||
600 | static void | |
601 | set_arch (const struct bfd_arch_info *arch, | |
602 | enum set_arch type) | |
603 | { | |
604 | if (GDB_MULTI_ARCH) | |
8e65ff28 AC |
605 | internal_error (__FILE__, __LINE__, |
606 | "set_arch: not multi-arched"); | |
b4a20239 AC |
607 | switch (type) |
608 | { | |
609 | case set_arch_auto: | |
610 | if (!arch_ok (arch)) | |
611 | warning ("Target may not support %s architecture", | |
612 | arch->printable_name); | |
613 | target_architecture = arch; | |
614 | break; | |
615 | case set_arch_manual: | |
616 | if (!arch_ok (arch)) | |
617 | { | |
618 | printf_unfiltered ("Target does not support `%s' architecture.\n", | |
619 | arch->printable_name); | |
620 | } | |
621 | else | |
622 | { | |
623 | target_architecture_auto = 0; | |
624 | target_architecture = arch; | |
625 | } | |
626 | break; | |
627 | } | |
628 | if (gdbarch_debug) | |
4b9b3959 | 629 | gdbarch_dump (current_gdbarch, gdb_stdlog); |
b4a20239 AC |
630 | } |
631 | ||
632 | /* Set the architecture from arch/machine (deprecated) */ | |
633 | ||
634 | void | |
635 | set_architecture_from_arch_mach (enum bfd_architecture arch, | |
636 | unsigned long mach) | |
637 | { | |
638 | const struct bfd_arch_info *wanted = bfd_lookup_arch (arch, mach); | |
639 | if (GDB_MULTI_ARCH) | |
8e65ff28 AC |
640 | internal_error (__FILE__, __LINE__, |
641 | "set_architecture_from_arch_mach: not multi-arched"); | |
b4a20239 AC |
642 | if (wanted != NULL) |
643 | set_arch (wanted, set_arch_manual); | |
644 | else | |
8e65ff28 AC |
645 | internal_error (__FILE__, __LINE__, |
646 | "gdbarch: hardwired architecture/machine not recognized"); | |
b4a20239 AC |
647 | } |
648 | ||
649 | /* Set the architecture from a BFD (deprecated) */ | |
650 | ||
651 | static void | |
652 | set_architecture_from_file (bfd *abfd) | |
653 | { | |
654 | const struct bfd_arch_info *wanted = bfd_get_arch_info (abfd); | |
655 | if (GDB_MULTI_ARCH) | |
8e65ff28 AC |
656 | internal_error (__FILE__, __LINE__, |
657 | "set_architecture_from_file: not multi-arched"); | |
b4a20239 AC |
658 | if (target_architecture_auto) |
659 | { | |
660 | set_arch (wanted, set_arch_auto); | |
661 | } | |
662 | else if (wanted != target_architecture) | |
663 | { | |
664 | warning ("%s architecture file may be incompatible with %s target.", | |
665 | wanted->printable_name, | |
666 | target_architecture->printable_name); | |
667 | } | |
668 | } | |
669 | ||
670 | ||
671 | /* Called if the user enters ``show architecture'' without an | |
672 | argument. */ | |
673 | ||
674 | static void | |
675 | show_architecture (char *args, int from_tty) | |
676 | { | |
677 | const char *arch; | |
678 | arch = TARGET_ARCHITECTURE->printable_name; | |
679 | if (target_architecture_auto) | |
680 | printf_filtered ("The target architecture is set automatically (currently %s)\n", arch); | |
681 | else | |
682 | printf_filtered ("The target architecture is assumed to be %s\n", arch); | |
683 | } | |
684 | ||
685 | ||
686 | /* Called if the user enters ``set architecture'' with or without an | |
687 | argument. */ | |
688 | ||
689 | static void | |
690 | set_architecture (char *ignore_args, int from_tty, struct cmd_list_element *c) | |
691 | { | |
692 | if (strcmp (set_architecture_string, "auto") == 0) | |
693 | { | |
694 | target_architecture_auto = 1; | |
695 | } | |
696 | else if (GDB_MULTI_ARCH) | |
697 | { | |
698 | struct gdbarch_info info; | |
fb6ecb0f | 699 | gdbarch_info_init (&info); |
b4a20239 AC |
700 | info.bfd_arch_info = bfd_scan_arch (set_architecture_string); |
701 | if (info.bfd_arch_info == NULL) | |
8e65ff28 AC |
702 | internal_error (__FILE__, __LINE__, |
703 | "set_architecture: bfd_scan_arch failed"); | |
16f33e29 | 704 | if (gdbarch_update_p (info)) |
b4a20239 AC |
705 | target_architecture_auto = 0; |
706 | else | |
ec3d358c | 707 | printf_unfiltered ("Architecture `%s' not recognized.\n", |
b4a20239 AC |
708 | set_architecture_string); |
709 | } | |
710 | else | |
711 | { | |
712 | const struct bfd_arch_info *arch | |
713 | = bfd_scan_arch (set_architecture_string); | |
714 | if (arch == NULL) | |
8e65ff28 AC |
715 | internal_error (__FILE__, __LINE__, |
716 | "set_architecture: bfd_scan_arch failed"); | |
b4a20239 AC |
717 | set_arch (arch, set_arch_manual); |
718 | } | |
719 | show_architecture (NULL, from_tty); | |
720 | } | |
721 | ||
b7d6b182 | 722 | /* Set the dynamic target-system-dependent parameters (architecture, |
b4a20239 AC |
723 | byte-order) using information found in the BFD */ |
724 | ||
725 | void | |
fba45db2 | 726 | set_gdbarch_from_file (bfd *abfd) |
b4a20239 AC |
727 | { |
728 | if (GDB_MULTI_ARCH) | |
729 | { | |
730 | struct gdbarch_info info; | |
fb6ecb0f | 731 | gdbarch_info_init (&info); |
b4a20239 | 732 | info.abfd = abfd; |
16f33e29 | 733 | if (! gdbarch_update_p (info)) |
ec3d358c | 734 | error ("Architecture of file not recognized.\n"); |
b4a20239 AC |
735 | } |
736 | else | |
737 | { | |
738 | set_architecture_from_file (abfd); | |
739 | set_endian_from_file (abfd); | |
740 | } | |
741 | } | |
742 | ||
743 | /* Initialize the current architecture. Update the ``set | |
744 | architecture'' command so that it specifies a list of valid | |
745 | architectures. */ | |
746 | ||
1ba607ad AC |
747 | #ifdef DEFAULT_BFD_ARCH |
748 | extern const bfd_arch_info_type DEFAULT_BFD_ARCH; | |
749 | static const bfd_arch_info_type *default_bfd_arch = &DEFAULT_BFD_ARCH; | |
750 | #else | |
4b9b3959 | 751 | static const bfd_arch_info_type *default_bfd_arch; |
1ba607ad AC |
752 | #endif |
753 | ||
754 | #ifdef DEFAULT_BFD_VEC | |
755 | extern const bfd_target DEFAULT_BFD_VEC; | |
756 | static const bfd_target *default_bfd_vec = &DEFAULT_BFD_VEC; | |
757 | #else | |
758 | static const bfd_target *default_bfd_vec; | |
759 | #endif | |
760 | ||
b4a20239 AC |
761 | void |
762 | initialize_current_architecture (void) | |
763 | { | |
764 | const char **arches = gdbarch_printable_names (); | |
b4a20239 | 765 | |
1ba607ad AC |
766 | /* determine a default architecture and byte order. */ |
767 | struct gdbarch_info info; | |
fb6ecb0f | 768 | gdbarch_info_init (&info); |
1ba607ad AC |
769 | |
770 | /* Find a default architecture. */ | |
771 | if (info.bfd_arch_info == NULL | |
772 | && default_bfd_arch != NULL) | |
773 | info.bfd_arch_info = default_bfd_arch; | |
774 | if (info.bfd_arch_info == NULL) | |
b4a20239 | 775 | { |
1ba607ad AC |
776 | /* Choose the architecture by taking the first one |
777 | alphabetically. */ | |
778 | const char *chosen = arches[0]; | |
b4a20239 | 779 | const char **arch; |
b4a20239 AC |
780 | for (arch = arches; *arch != NULL; arch++) |
781 | { | |
b4a20239 AC |
782 | if (strcmp (*arch, chosen) < 0) |
783 | chosen = *arch; | |
784 | } | |
785 | if (chosen == NULL) | |
8e65ff28 AC |
786 | internal_error (__FILE__, __LINE__, |
787 | "initialize_current_architecture: No arch"); | |
b4a20239 AC |
788 | info.bfd_arch_info = bfd_scan_arch (chosen); |
789 | if (info.bfd_arch_info == NULL) | |
8e65ff28 AC |
790 | internal_error (__FILE__, __LINE__, |
791 | "initialize_current_architecture: Arch not found"); | |
1ba607ad AC |
792 | } |
793 | ||
afe64c1a | 794 | /* Take several guesses at a byte order. */ |
428721aa | 795 | if (info.byte_order == BFD_ENDIAN_UNKNOWN |
1ba607ad AC |
796 | && default_bfd_vec != NULL) |
797 | { | |
798 | /* Extract BFD's default vector's byte order. */ | |
799 | switch (default_bfd_vec->byteorder) | |
800 | { | |
801 | case BFD_ENDIAN_BIG: | |
d7449b42 | 802 | info.byte_order = BFD_ENDIAN_BIG; |
1ba607ad AC |
803 | break; |
804 | case BFD_ENDIAN_LITTLE: | |
778eb05e | 805 | info.byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad AC |
806 | break; |
807 | default: | |
808 | break; | |
809 | } | |
810 | } | |
428721aa | 811 | if (info.byte_order == BFD_ENDIAN_UNKNOWN) |
1ba607ad AC |
812 | { |
813 | /* look for ``*el-*'' in the target name. */ | |
814 | const char *chp; | |
815 | chp = strchr (target_name, '-'); | |
816 | if (chp != NULL | |
817 | && chp - 2 >= target_name | |
818 | && strncmp (chp - 2, "el", 2) == 0) | |
778eb05e | 819 | info.byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad | 820 | } |
428721aa | 821 | if (info.byte_order == BFD_ENDIAN_UNKNOWN) |
1ba607ad AC |
822 | { |
823 | /* Wire it to big-endian!!! */ | |
d7449b42 | 824 | info.byte_order = BFD_ENDIAN_BIG; |
1ba607ad AC |
825 | } |
826 | ||
827 | if (GDB_MULTI_ARCH) | |
828 | { | |
16f33e29 AC |
829 | if (! gdbarch_update_p (info)) |
830 | { | |
8e65ff28 AC |
831 | internal_error (__FILE__, __LINE__, |
832 | "initialize_current_architecture: Selection of initial architecture failed"); | |
16f33e29 | 833 | } |
b4a20239 | 834 | } |
ceaa8edf | 835 | else |
afe64c1a AC |
836 | { |
837 | /* If the multi-arch logic comes up with a byte-order (from BFD) | |
838 | use it for the non-multi-arch case. */ | |
839 | if (info.byte_order != BFD_ENDIAN_UNKNOWN) | |
840 | target_byte_order = info.byte_order; | |
841 | initialize_non_multiarch (); | |
842 | } | |
b4a20239 | 843 | |
1ba607ad AC |
844 | /* Create the ``set architecture'' command appending ``auto'' to the |
845 | list of architectures. */ | |
b4a20239 AC |
846 | { |
847 | struct cmd_list_element *c; | |
848 | /* Append ``auto''. */ | |
849 | int nr; | |
850 | for (nr = 0; arches[nr] != NULL; nr++); | |
851 | arches = xrealloc (arches, sizeof (char*) * (nr + 2)); | |
852 | arches[nr + 0] = "auto"; | |
853 | arches[nr + 1] = NULL; | |
854 | /* FIXME: add_set_enum_cmd() uses an array of ``char *'' instead | |
855 | of ``const char *''. We just happen to know that the casts are | |
856 | safe. */ | |
857 | c = add_set_enum_cmd ("architecture", class_support, | |
53904c9e | 858 | arches, &set_architecture_string, |
b4a20239 AC |
859 | "Set architecture of target.", |
860 | &setlist); | |
9f60d481 | 861 | set_cmd_sfunc (c, set_architecture); |
b4a20239 AC |
862 | add_alias_cmd ("processor", "architecture", class_support, 1, &setlist); |
863 | /* Don't use set_from_show - need to print both auto/manual and | |
864 | current setting. */ | |
865 | add_cmd ("architecture", class_support, show_architecture, | |
866 | "Show the current target architecture", &showlist); | |
b4a20239 AC |
867 | } |
868 | } | |
869 | ||
870 | ||
fb6ecb0f AC |
871 | /* Initialize a gdbarch info to values that will be automatically |
872 | overridden. Note: Originally, this ``struct info'' was initialized | |
873 | using memset(0). Unfortunatly, that ran into problems, namely | |
874 | BFD_ENDIAN_BIG is zero. An explicit initialization function that | |
875 | can explicitly set each field to a well defined value is used. */ | |
876 | ||
877 | void | |
878 | gdbarch_info_init (struct gdbarch_info *info) | |
879 | { | |
880 | memset (info, 0, sizeof (struct gdbarch_info)); | |
428721aa | 881 | info->byte_order = BFD_ENDIAN_UNKNOWN; |
fb6ecb0f AC |
882 | } |
883 | ||
c0e8c252 AC |
884 | /* */ |
885 | ||
b4a20239 | 886 | extern initialize_file_ftype _initialize_gdbarch_utils; |
c0e8c252 AC |
887 | |
888 | void | |
b4a20239 | 889 | _initialize_gdbarch_utils (void) |
c0e8c252 | 890 | { |
b4a20239 AC |
891 | struct cmd_list_element *c; |
892 | c = add_set_enum_cmd ("endian", class_support, | |
893 | endian_enum, &set_endian_string, | |
894 | "Set endianness of target.", | |
895 | &setlist); | |
9f60d481 | 896 | set_cmd_sfunc (c, set_endian); |
b4a20239 AC |
897 | /* Don't use set_from_show - need to print both auto/manual and |
898 | current setting. */ | |
899 | add_cmd ("endian", class_support, show_endian, | |
900 | "Show the current byte-order", &showlist); | |
c0e8c252 | 901 | } |