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 | ||
c0e8c252 AC |
140 | char * |
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 RE |
243 | void |
244 | default_print_float_info (void) | |
245 | { | |
246 | #ifdef FLOAT_INFO | |
247 | #if GDB_MULTI_ARCH > GDB_MULTI_ARCH_PARTIAL | |
248 | #error "FLOAT_INFO defined in multi-arch" | |
249 | #endif | |
250 | FLOAT_INFO; | |
251 | #else | |
252 | printf_filtered ("No floating point info available for this processor.\n"); | |
253 | #endif | |
254 | } | |
255 | ||
193e3b1a AC |
256 | /* Misc helper functions for targets. */ |
257 | ||
258 | int | |
fba45db2 | 259 | frame_num_args_unknown (struct frame_info *fi) |
193e3b1a AC |
260 | { |
261 | return -1; | |
262 | } | |
263 | ||
264 | ||
265 | int | |
fba45db2 | 266 | generic_register_convertible_not (int num) |
193e3b1a AC |
267 | { |
268 | return 0; | |
269 | } | |
270 | ||
b4a20239 | 271 | |
c8f9d51c JB |
272 | /* Under some ABI's that specify the `struct convention' for returning |
273 | structures by value, by the time we've returned from the function, | |
274 | the return value is sitting there in the caller's buffer, but GDB | |
275 | has no way to find the address of that buffer. | |
276 | ||
277 | On such architectures, use this function as your | |
278 | extract_struct_value_address method. When asked to a struct | |
279 | returned by value in this fashion, GDB will print a nice error | |
280 | message, instead of garbage. */ | |
281 | CORE_ADDR | |
282 | generic_cannot_extract_struct_value_address (char *dummy) | |
283 | { | |
284 | return 0; | |
285 | } | |
286 | ||
f517ea4e | 287 | CORE_ADDR |
875e1767 | 288 | core_addr_identity (CORE_ADDR addr) |
f517ea4e PS |
289 | { |
290 | return addr; | |
291 | } | |
292 | ||
88c72b7d AC |
293 | int |
294 | no_op_reg_to_regnum (int reg) | |
295 | { | |
296 | return reg; | |
297 | } | |
298 | ||
c347ee3e MS |
299 | /* For use by frame_args_address and frame_locals_address. */ |
300 | CORE_ADDR | |
301 | default_frame_address (struct frame_info *fi) | |
302 | { | |
303 | return fi->frame; | |
304 | } | |
305 | ||
e02bc4cc DS |
306 | /* Default prepare_to_procced(). */ |
307 | int | |
308 | default_prepare_to_proceed (int select_it) | |
309 | { | |
310 | return 0; | |
311 | } | |
312 | ||
313 | /* Generic prepare_to_proceed(). This one should be suitable for most | |
314 | targets that support threads. */ | |
315 | int | |
316 | generic_prepare_to_proceed (int select_it) | |
317 | { | |
39f77062 | 318 | ptid_t wait_ptid; |
e02bc4cc DS |
319 | struct target_waitstatus wait_status; |
320 | ||
321 | /* Get the last target status returned by target_wait(). */ | |
39f77062 | 322 | get_last_target_status (&wait_ptid, &wait_status); |
e02bc4cc | 323 | |
8849f47d JL |
324 | /* Make sure we were stopped either at a breakpoint, or because |
325 | of a Ctrl-C. */ | |
e02bc4cc | 326 | if (wait_status.kind != TARGET_WAITKIND_STOPPED |
8849f47d JL |
327 | || (wait_status.value.sig != TARGET_SIGNAL_TRAP && |
328 | wait_status.value.sig != TARGET_SIGNAL_INT)) | |
e02bc4cc DS |
329 | { |
330 | return 0; | |
331 | } | |
332 | ||
39f77062 KB |
333 | if (!ptid_equal (wait_ptid, minus_one_ptid) |
334 | && !ptid_equal (inferior_ptid, wait_ptid)) | |
e02bc4cc DS |
335 | { |
336 | /* Switched over from WAIT_PID. */ | |
39f77062 | 337 | CORE_ADDR wait_pc = read_pc_pid (wait_ptid); |
e02bc4cc | 338 | |
8849f47d | 339 | if (wait_pc != read_pc ()) |
e02bc4cc DS |
340 | { |
341 | if (select_it) | |
342 | { | |
8849f47d | 343 | /* Switch back to WAIT_PID thread. */ |
39f77062 | 344 | inferior_ptid = wait_ptid; |
e02bc4cc DS |
345 | |
346 | /* FIXME: This stuff came from switch_to_thread() in | |
347 | thread.c (which should probably be a public function). */ | |
348 | flush_cached_frames (); | |
349 | registers_changed (); | |
350 | stop_pc = wait_pc; | |
0f7d239c | 351 | select_frame (get_current_frame ()); |
e02bc4cc | 352 | } |
8849f47d JL |
353 | /* We return 1 to indicate that there is a breakpoint here, |
354 | so we need to step over it before continuing to avoid | |
355 | hitting it straight away. */ | |
356 | if (breakpoint_here_p (wait_pc)) | |
357 | { | |
358 | return 1; | |
359 | } | |
e02bc4cc DS |
360 | } |
361 | } | |
362 | return 0; | |
363 | ||
364 | } | |
365 | ||
10312cc4 AC |
366 | void |
367 | init_frame_pc_noop (int fromleaf, struct frame_info *prev) | |
368 | { | |
369 | return; | |
370 | } | |
371 | ||
7824d2f2 AC |
372 | void |
373 | init_frame_pc_default (int fromleaf, struct frame_info *prev) | |
374 | { | |
375 | if (fromleaf) | |
376 | prev->pc = SAVED_PC_AFTER_CALL (prev->next); | |
377 | else if (prev->next != NULL) | |
378 | prev->pc = FRAME_SAVED_PC (prev->next); | |
379 | else | |
380 | prev->pc = read_pc (); | |
381 | } | |
382 | ||
a2cf933a EZ |
383 | void |
384 | default_elf_make_msymbol_special (asymbol *sym, struct minimal_symbol *msym) | |
385 | { | |
386 | return; | |
387 | } | |
388 | ||
389 | void | |
390 | default_coff_make_msymbol_special (int val, struct minimal_symbol *msym) | |
391 | { | |
392 | return; | |
393 | } | |
394 | ||
01fb7433 AC |
395 | int |
396 | cannot_register_not (int regnum) | |
397 | { | |
398 | return 0; | |
399 | } | |
39d4ef09 AC |
400 | |
401 | /* Legacy version of target_virtual_frame_pointer(). Assumes that | |
402 | there is an FP_REGNUM and that it is the same, cooked or raw. */ | |
403 | ||
404 | void | |
405 | legacy_virtual_frame_pointer (CORE_ADDR pc, | |
406 | int *frame_regnum, | |
407 | LONGEST *frame_offset) | |
408 | { | |
409 | gdb_assert (FP_REGNUM >= 0); | |
410 | *frame_regnum = FP_REGNUM; | |
411 | *frame_offset = 0; | |
412 | } | |
46cd78fb | 413 | |
b2e75d78 AC |
414 | /* Assume the world is sane, every register's virtual and real size |
415 | is identical. */ | |
46cd78fb AC |
416 | |
417 | int | |
b2e75d78 | 418 | generic_register_size (int regnum) |
46cd78fb AC |
419 | { |
420 | gdb_assert (regnum >= 0 && regnum < NUM_REGS + NUM_PSEUDO_REGS); | |
ef8570de | 421 | return TYPE_LENGTH (REGISTER_VIRTUAL_TYPE (regnum)); |
ce29138a MS |
422 | } |
423 | ||
d7bd68ca AC |
424 | #if !defined (IN_SIGTRAMP) |
425 | #if defined (SIGTRAMP_START) | |
426 | #define IN_SIGTRAMP(pc, name) \ | |
427 | ((pc) >= SIGTRAMP_START(pc) \ | |
428 | && (pc) < SIGTRAMP_END(pc) \ | |
429 | ) | |
430 | #else | |
431 | #define IN_SIGTRAMP(pc, name) \ | |
432 | (name && STREQ ("_sigtramp", name)) | |
433 | #endif | |
434 | #endif | |
435 | \f | |
436 | int | |
437 | legacy_pc_in_sigtramp (CORE_ADDR pc, char *name) | |
438 | { | |
439 | return IN_SIGTRAMP(pc, name); | |
440 | } | |
441 | ||
13d01224 AC |
442 | int |
443 | legacy_convert_register_p (int regnum) | |
444 | { | |
445 | return REGISTER_CONVERTIBLE (regnum); | |
446 | } | |
447 | ||
448 | void | |
449 | legacy_register_to_value (int regnum, struct type *type, | |
450 | char *from, char *to) | |
451 | { | |
452 | REGISTER_CONVERT_TO_VIRTUAL (regnum, type, from, to); | |
453 | } | |
454 | ||
455 | void | |
456 | legacy_value_to_register (struct type *type, int regnum, | |
457 | char *from, char *to) | |
458 | { | |
459 | REGISTER_CONVERT_TO_RAW (type, regnum, from, to); | |
460 | } | |
461 | ||
01fb7433 | 462 | \f |
b4a20239 AC |
463 | /* Functions to manipulate the endianness of the target. */ |
464 | ||
1ba607ad | 465 | /* ``target_byte_order'' is only used when non- multi-arch. |
afe64c1a AC |
466 | Multi-arch targets obtain the current byte order using the |
467 | TARGET_BYTE_ORDER gdbarch method. | |
468 | ||
469 | The choice of initial value is entirely arbitrary. During startup, | |
470 | the function initialize_current_architecture() updates this value | |
471 | based on default byte-order information extracted from BFD. */ | |
472 | int target_byte_order = BFD_ENDIAN_BIG; | |
b4a20239 AC |
473 | int target_byte_order_auto = 1; |
474 | ||
53904c9e AC |
475 | static const char endian_big[] = "big"; |
476 | static const char endian_little[] = "little"; | |
477 | static const char endian_auto[] = "auto"; | |
478 | static const char *endian_enum[] = | |
b4a20239 AC |
479 | { |
480 | endian_big, | |
481 | endian_little, | |
482 | endian_auto, | |
483 | NULL, | |
484 | }; | |
53904c9e | 485 | static const char *set_endian_string; |
b4a20239 AC |
486 | |
487 | /* Called by ``show endian''. */ | |
488 | ||
489 | static void | |
490 | show_endian (char *args, int from_tty) | |
491 | { | |
492 | if (TARGET_BYTE_ORDER_AUTO) | |
493 | printf_unfiltered ("The target endianness is set automatically (currently %s endian)\n", | |
d7449b42 | 494 | (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little")); |
b4a20239 AC |
495 | else |
496 | printf_unfiltered ("The target is assumed to be %s endian\n", | |
d7449b42 | 497 | (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little")); |
b4a20239 AC |
498 | } |
499 | ||
500 | static void | |
501 | set_endian (char *ignore_args, int from_tty, struct cmd_list_element *c) | |
502 | { | |
3fd3d7d2 | 503 | if (set_endian_string == endian_auto) |
b4a20239 AC |
504 | { |
505 | target_byte_order_auto = 1; | |
506 | } | |
507 | else if (set_endian_string == endian_little) | |
508 | { | |
b4a20239 AC |
509 | target_byte_order_auto = 0; |
510 | if (GDB_MULTI_ARCH) | |
511 | { | |
512 | struct gdbarch_info info; | |
fb6ecb0f | 513 | gdbarch_info_init (&info); |
778eb05e | 514 | info.byte_order = BFD_ENDIAN_LITTLE; |
16f33e29 AC |
515 | if (! gdbarch_update_p (info)) |
516 | { | |
517 | printf_unfiltered ("Little endian target not supported by GDB\n"); | |
518 | } | |
b4a20239 | 519 | } |
1ba607ad AC |
520 | else |
521 | { | |
778eb05e | 522 | target_byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad | 523 | } |
b4a20239 AC |
524 | } |
525 | else if (set_endian_string == endian_big) | |
526 | { | |
b4a20239 AC |
527 | target_byte_order_auto = 0; |
528 | if (GDB_MULTI_ARCH) | |
529 | { | |
530 | struct gdbarch_info info; | |
fb6ecb0f | 531 | gdbarch_info_init (&info); |
d7449b42 | 532 | info.byte_order = BFD_ENDIAN_BIG; |
16f33e29 AC |
533 | if (! gdbarch_update_p (info)) |
534 | { | |
535 | printf_unfiltered ("Big endian target not supported by GDB\n"); | |
536 | } | |
b4a20239 | 537 | } |
1ba607ad AC |
538 | else |
539 | { | |
d7449b42 | 540 | target_byte_order = BFD_ENDIAN_BIG; |
1ba607ad | 541 | } |
b4a20239 AC |
542 | } |
543 | else | |
8e65ff28 AC |
544 | internal_error (__FILE__, __LINE__, |
545 | "set_endian: bad value"); | |
b4a20239 AC |
546 | show_endian (NULL, from_tty); |
547 | } | |
548 | ||
549 | /* Set the endianness from a BFD. */ | |
550 | ||
551 | static void | |
552 | set_endian_from_file (bfd *abfd) | |
553 | { | |
3fd3d7d2 | 554 | int want; |
1ba607ad | 555 | if (GDB_MULTI_ARCH) |
8e65ff28 AC |
556 | internal_error (__FILE__, __LINE__, |
557 | "set_endian_from_file: not for multi-arch"); | |
3fd3d7d2 AC |
558 | if (bfd_big_endian (abfd)) |
559 | want = BFD_ENDIAN_BIG; | |
b4a20239 | 560 | else |
3fd3d7d2 AC |
561 | want = BFD_ENDIAN_LITTLE; |
562 | if (TARGET_BYTE_ORDER_AUTO) | |
563 | target_byte_order = want; | |
564 | else if (TARGET_BYTE_ORDER != want) | |
565 | warning ("%s endian file does not match %s endian target.", | |
566 | want == BFD_ENDIAN_BIG ? "big" : "little", | |
567 | TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little"); | |
b4a20239 AC |
568 | } |
569 | ||
570 | ||
571 | /* Functions to manipulate the architecture of the target */ | |
572 | ||
573 | enum set_arch { set_arch_auto, set_arch_manual }; | |
574 | ||
575 | int target_architecture_auto = 1; | |
576 | ||
53904c9e | 577 | const char *set_architecture_string; |
b4a20239 AC |
578 | |
579 | /* Old way of changing the current architecture. */ | |
580 | ||
581 | extern const struct bfd_arch_info bfd_default_arch_struct; | |
582 | const struct bfd_arch_info *target_architecture = &bfd_default_arch_struct; | |
583 | int (*target_architecture_hook) (const struct bfd_arch_info *ap); | |
584 | ||
585 | static int | |
586 | arch_ok (const struct bfd_arch_info *arch) | |
587 | { | |
588 | if (GDB_MULTI_ARCH) | |
8e65ff28 AC |
589 | internal_error (__FILE__, __LINE__, |
590 | "arch_ok: not multi-arched"); | |
b4a20239 AC |
591 | /* Should be performing the more basic check that the binary is |
592 | compatible with GDB. */ | |
593 | /* Check with the target that the architecture is valid. */ | |
594 | return (target_architecture_hook == NULL | |
595 | || target_architecture_hook (arch)); | |
596 | } | |
597 | ||
598 | static void | |
599 | set_arch (const struct bfd_arch_info *arch, | |
600 | enum set_arch type) | |
601 | { | |
602 | if (GDB_MULTI_ARCH) | |
8e65ff28 AC |
603 | internal_error (__FILE__, __LINE__, |
604 | "set_arch: not multi-arched"); | |
b4a20239 AC |
605 | switch (type) |
606 | { | |
607 | case set_arch_auto: | |
608 | if (!arch_ok (arch)) | |
609 | warning ("Target may not support %s architecture", | |
610 | arch->printable_name); | |
611 | target_architecture = arch; | |
612 | break; | |
613 | case set_arch_manual: | |
614 | if (!arch_ok (arch)) | |
615 | { | |
616 | printf_unfiltered ("Target does not support `%s' architecture.\n", | |
617 | arch->printable_name); | |
618 | } | |
619 | else | |
620 | { | |
621 | target_architecture_auto = 0; | |
622 | target_architecture = arch; | |
623 | } | |
624 | break; | |
625 | } | |
626 | if (gdbarch_debug) | |
4b9b3959 | 627 | gdbarch_dump (current_gdbarch, gdb_stdlog); |
b4a20239 AC |
628 | } |
629 | ||
630 | /* Set the architecture from arch/machine (deprecated) */ | |
631 | ||
632 | void | |
633 | set_architecture_from_arch_mach (enum bfd_architecture arch, | |
634 | unsigned long mach) | |
635 | { | |
636 | const struct bfd_arch_info *wanted = bfd_lookup_arch (arch, mach); | |
637 | if (GDB_MULTI_ARCH) | |
8e65ff28 AC |
638 | internal_error (__FILE__, __LINE__, |
639 | "set_architecture_from_arch_mach: not multi-arched"); | |
b4a20239 AC |
640 | if (wanted != NULL) |
641 | set_arch (wanted, set_arch_manual); | |
642 | else | |
8e65ff28 AC |
643 | internal_error (__FILE__, __LINE__, |
644 | "gdbarch: hardwired architecture/machine not recognized"); | |
b4a20239 AC |
645 | } |
646 | ||
647 | /* Set the architecture from a BFD (deprecated) */ | |
648 | ||
649 | static void | |
650 | set_architecture_from_file (bfd *abfd) | |
651 | { | |
652 | const struct bfd_arch_info *wanted = bfd_get_arch_info (abfd); | |
653 | if (GDB_MULTI_ARCH) | |
8e65ff28 AC |
654 | internal_error (__FILE__, __LINE__, |
655 | "set_architecture_from_file: not multi-arched"); | |
b4a20239 AC |
656 | if (target_architecture_auto) |
657 | { | |
658 | set_arch (wanted, set_arch_auto); | |
659 | } | |
660 | else if (wanted != target_architecture) | |
661 | { | |
662 | warning ("%s architecture file may be incompatible with %s target.", | |
663 | wanted->printable_name, | |
664 | target_architecture->printable_name); | |
665 | } | |
666 | } | |
667 | ||
668 | ||
669 | /* Called if the user enters ``show architecture'' without an | |
670 | argument. */ | |
671 | ||
672 | static void | |
673 | show_architecture (char *args, int from_tty) | |
674 | { | |
675 | const char *arch; | |
676 | arch = TARGET_ARCHITECTURE->printable_name; | |
677 | if (target_architecture_auto) | |
678 | printf_filtered ("The target architecture is set automatically (currently %s)\n", arch); | |
679 | else | |
680 | printf_filtered ("The target architecture is assumed to be %s\n", arch); | |
681 | } | |
682 | ||
683 | ||
684 | /* Called if the user enters ``set architecture'' with or without an | |
685 | argument. */ | |
686 | ||
687 | static void | |
688 | set_architecture (char *ignore_args, int from_tty, struct cmd_list_element *c) | |
689 | { | |
690 | if (strcmp (set_architecture_string, "auto") == 0) | |
691 | { | |
692 | target_architecture_auto = 1; | |
693 | } | |
694 | else if (GDB_MULTI_ARCH) | |
695 | { | |
696 | struct gdbarch_info info; | |
fb6ecb0f | 697 | gdbarch_info_init (&info); |
b4a20239 AC |
698 | info.bfd_arch_info = bfd_scan_arch (set_architecture_string); |
699 | if (info.bfd_arch_info == NULL) | |
8e65ff28 AC |
700 | internal_error (__FILE__, __LINE__, |
701 | "set_architecture: bfd_scan_arch failed"); | |
16f33e29 | 702 | if (gdbarch_update_p (info)) |
b4a20239 AC |
703 | target_architecture_auto = 0; |
704 | else | |
ec3d358c | 705 | printf_unfiltered ("Architecture `%s' not recognized.\n", |
b4a20239 AC |
706 | set_architecture_string); |
707 | } | |
708 | else | |
709 | { | |
710 | const struct bfd_arch_info *arch | |
711 | = bfd_scan_arch (set_architecture_string); | |
712 | if (arch == NULL) | |
8e65ff28 AC |
713 | internal_error (__FILE__, __LINE__, |
714 | "set_architecture: bfd_scan_arch failed"); | |
b4a20239 AC |
715 | set_arch (arch, set_arch_manual); |
716 | } | |
717 | show_architecture (NULL, from_tty); | |
718 | } | |
719 | ||
b7d6b182 | 720 | /* Set the dynamic target-system-dependent parameters (architecture, |
b4a20239 AC |
721 | byte-order) using information found in the BFD */ |
722 | ||
723 | void | |
fba45db2 | 724 | set_gdbarch_from_file (bfd *abfd) |
b4a20239 AC |
725 | { |
726 | if (GDB_MULTI_ARCH) | |
727 | { | |
728 | struct gdbarch_info info; | |
fb6ecb0f | 729 | gdbarch_info_init (&info); |
b4a20239 | 730 | info.abfd = abfd; |
16f33e29 | 731 | if (! gdbarch_update_p (info)) |
ec3d358c | 732 | error ("Architecture of file not recognized.\n"); |
b4a20239 AC |
733 | } |
734 | else | |
735 | { | |
736 | set_architecture_from_file (abfd); | |
737 | set_endian_from_file (abfd); | |
738 | } | |
739 | } | |
740 | ||
741 | /* Initialize the current architecture. Update the ``set | |
742 | architecture'' command so that it specifies a list of valid | |
743 | architectures. */ | |
744 | ||
1ba607ad AC |
745 | #ifdef DEFAULT_BFD_ARCH |
746 | extern const bfd_arch_info_type DEFAULT_BFD_ARCH; | |
747 | static const bfd_arch_info_type *default_bfd_arch = &DEFAULT_BFD_ARCH; | |
748 | #else | |
4b9b3959 | 749 | static const bfd_arch_info_type *default_bfd_arch; |
1ba607ad AC |
750 | #endif |
751 | ||
752 | #ifdef DEFAULT_BFD_VEC | |
753 | extern const bfd_target DEFAULT_BFD_VEC; | |
754 | static const bfd_target *default_bfd_vec = &DEFAULT_BFD_VEC; | |
755 | #else | |
756 | static const bfd_target *default_bfd_vec; | |
757 | #endif | |
758 | ||
b4a20239 AC |
759 | void |
760 | initialize_current_architecture (void) | |
761 | { | |
762 | const char **arches = gdbarch_printable_names (); | |
b4a20239 | 763 | |
1ba607ad AC |
764 | /* determine a default architecture and byte order. */ |
765 | struct gdbarch_info info; | |
fb6ecb0f | 766 | gdbarch_info_init (&info); |
1ba607ad AC |
767 | |
768 | /* Find a default architecture. */ | |
769 | if (info.bfd_arch_info == NULL | |
770 | && default_bfd_arch != NULL) | |
771 | info.bfd_arch_info = default_bfd_arch; | |
772 | if (info.bfd_arch_info == NULL) | |
b4a20239 | 773 | { |
1ba607ad AC |
774 | /* Choose the architecture by taking the first one |
775 | alphabetically. */ | |
776 | const char *chosen = arches[0]; | |
b4a20239 | 777 | const char **arch; |
b4a20239 AC |
778 | for (arch = arches; *arch != NULL; arch++) |
779 | { | |
b4a20239 AC |
780 | if (strcmp (*arch, chosen) < 0) |
781 | chosen = *arch; | |
782 | } | |
783 | if (chosen == NULL) | |
8e65ff28 AC |
784 | internal_error (__FILE__, __LINE__, |
785 | "initialize_current_architecture: No arch"); | |
b4a20239 AC |
786 | info.bfd_arch_info = bfd_scan_arch (chosen); |
787 | if (info.bfd_arch_info == NULL) | |
8e65ff28 AC |
788 | internal_error (__FILE__, __LINE__, |
789 | "initialize_current_architecture: Arch not found"); | |
1ba607ad AC |
790 | } |
791 | ||
afe64c1a | 792 | /* Take several guesses at a byte order. */ |
428721aa | 793 | if (info.byte_order == BFD_ENDIAN_UNKNOWN |
1ba607ad AC |
794 | && default_bfd_vec != NULL) |
795 | { | |
796 | /* Extract BFD's default vector's byte order. */ | |
797 | switch (default_bfd_vec->byteorder) | |
798 | { | |
799 | case BFD_ENDIAN_BIG: | |
d7449b42 | 800 | info.byte_order = BFD_ENDIAN_BIG; |
1ba607ad AC |
801 | break; |
802 | case BFD_ENDIAN_LITTLE: | |
778eb05e | 803 | info.byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad AC |
804 | break; |
805 | default: | |
806 | break; | |
807 | } | |
808 | } | |
428721aa | 809 | if (info.byte_order == BFD_ENDIAN_UNKNOWN) |
1ba607ad AC |
810 | { |
811 | /* look for ``*el-*'' in the target name. */ | |
812 | const char *chp; | |
813 | chp = strchr (target_name, '-'); | |
814 | if (chp != NULL | |
815 | && chp - 2 >= target_name | |
816 | && strncmp (chp - 2, "el", 2) == 0) | |
778eb05e | 817 | info.byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad | 818 | } |
428721aa | 819 | if (info.byte_order == BFD_ENDIAN_UNKNOWN) |
1ba607ad AC |
820 | { |
821 | /* Wire it to big-endian!!! */ | |
d7449b42 | 822 | info.byte_order = BFD_ENDIAN_BIG; |
1ba607ad AC |
823 | } |
824 | ||
825 | if (GDB_MULTI_ARCH) | |
826 | { | |
16f33e29 AC |
827 | if (! gdbarch_update_p (info)) |
828 | { | |
8e65ff28 AC |
829 | internal_error (__FILE__, __LINE__, |
830 | "initialize_current_architecture: Selection of initial architecture failed"); | |
16f33e29 | 831 | } |
b4a20239 | 832 | } |
ceaa8edf | 833 | else |
afe64c1a AC |
834 | { |
835 | /* If the multi-arch logic comes up with a byte-order (from BFD) | |
836 | use it for the non-multi-arch case. */ | |
837 | if (info.byte_order != BFD_ENDIAN_UNKNOWN) | |
838 | target_byte_order = info.byte_order; | |
839 | initialize_non_multiarch (); | |
840 | } | |
b4a20239 | 841 | |
1ba607ad AC |
842 | /* Create the ``set architecture'' command appending ``auto'' to the |
843 | list of architectures. */ | |
b4a20239 AC |
844 | { |
845 | struct cmd_list_element *c; | |
846 | /* Append ``auto''. */ | |
847 | int nr; | |
848 | for (nr = 0; arches[nr] != NULL; nr++); | |
849 | arches = xrealloc (arches, sizeof (char*) * (nr + 2)); | |
850 | arches[nr + 0] = "auto"; | |
851 | arches[nr + 1] = NULL; | |
852 | /* FIXME: add_set_enum_cmd() uses an array of ``char *'' instead | |
853 | of ``const char *''. We just happen to know that the casts are | |
854 | safe. */ | |
855 | c = add_set_enum_cmd ("architecture", class_support, | |
53904c9e | 856 | arches, &set_architecture_string, |
b4a20239 AC |
857 | "Set architecture of target.", |
858 | &setlist); | |
9f60d481 | 859 | set_cmd_sfunc (c, set_architecture); |
b4a20239 AC |
860 | add_alias_cmd ("processor", "architecture", class_support, 1, &setlist); |
861 | /* Don't use set_from_show - need to print both auto/manual and | |
862 | current setting. */ | |
863 | add_cmd ("architecture", class_support, show_architecture, | |
864 | "Show the current target architecture", &showlist); | |
b4a20239 AC |
865 | } |
866 | } | |
867 | ||
868 | ||
fb6ecb0f AC |
869 | /* Initialize a gdbarch info to values that will be automatically |
870 | overridden. Note: Originally, this ``struct info'' was initialized | |
871 | using memset(0). Unfortunatly, that ran into problems, namely | |
872 | BFD_ENDIAN_BIG is zero. An explicit initialization function that | |
873 | can explicitly set each field to a well defined value is used. */ | |
874 | ||
875 | void | |
876 | gdbarch_info_init (struct gdbarch_info *info) | |
877 | { | |
878 | memset (info, 0, sizeof (struct gdbarch_info)); | |
428721aa | 879 | info->byte_order = BFD_ENDIAN_UNKNOWN; |
fb6ecb0f AC |
880 | } |
881 | ||
c0e8c252 AC |
882 | /* */ |
883 | ||
b4a20239 | 884 | extern initialize_file_ftype _initialize_gdbarch_utils; |
c0e8c252 AC |
885 | |
886 | void | |
b4a20239 | 887 | _initialize_gdbarch_utils (void) |
c0e8c252 | 888 | { |
b4a20239 AC |
889 | struct cmd_list_element *c; |
890 | c = add_set_enum_cmd ("endian", class_support, | |
891 | endian_enum, &set_endian_string, | |
892 | "Set endianness of target.", | |
893 | &setlist); | |
9f60d481 | 894 | set_cmd_sfunc (c, set_endian); |
b4a20239 AC |
895 | /* Don't use set_from_show - need to print both auto/manual and |
896 | current setting. */ | |
897 | add_cmd ("endian", class_support, show_endian, | |
898 | "Show the current byte-order", &showlist); | |
c0e8c252 | 899 | } |