Commit | Line | Data |
---|---|---|
c0e8c252 | 1 | /* Dynamic architecture support for GDB, the GNU debugger. |
f4f9705a | 2 | |
4be87837 | 3 | Copyright 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, |
f4f9705a | 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 | ||
049ee0e4 AC |
51 | /* Implementation of extract return value that grubs around in the |
52 | register cache. */ | |
53 | void | |
54 | legacy_extract_return_value (struct type *type, struct regcache *regcache, | |
ebba8386 | 55 | void *valbuf) |
049ee0e4 AC |
56 | { |
57 | char *registers = deprecated_grub_regcache_for_registers (regcache); | |
ebba8386 | 58 | bfd_byte *buf = valbuf; |
524d7c18 | 59 | DEPRECATED_EXTRACT_RETURN_VALUE (type, registers, buf); /* OK */ |
049ee0e4 AC |
60 | } |
61 | ||
ebba8386 AC |
62 | /* Implementation of store return value that grubs the register cache. |
63 | Takes a local copy of the buffer to avoid const problems. */ | |
64 | void | |
65 | legacy_store_return_value (struct type *type, struct regcache *regcache, | |
66 | const void *buf) | |
67 | { | |
68 | bfd_byte *b = alloca (TYPE_LENGTH (type)); | |
69 | gdb_assert (regcache == current_regcache); | |
70 | memcpy (b, buf, TYPE_LENGTH (type)); | |
71 | DEPRECATED_STORE_RETURN_VALUE (type, b); | |
72 | } | |
73 | ||
74 | ||
4182591f AC |
75 | int |
76 | legacy_register_sim_regno (int regnum) | |
77 | { | |
78 | /* Only makes sense to supply raw registers. */ | |
79 | gdb_assert (regnum >= 0 && regnum < NUM_REGS); | |
80 | /* NOTE: cagney/2002-05-13: The old code did it this way and it is | |
81 | suspected that some GDB/SIM combinations may rely on this | |
82 | behavour. The default should be one2one_register_sim_regno | |
83 | (below). */ | |
84 | if (REGISTER_NAME (regnum) != NULL | |
85 | && REGISTER_NAME (regnum)[0] != '\0') | |
86 | return regnum; | |
87 | else | |
88 | return LEGACY_SIM_REGNO_IGNORE; | |
89 | } | |
90 | ||
c0e8c252 AC |
91 | int |
92 | generic_frameless_function_invocation_not (struct frame_info *fi) | |
93 | { | |
94 | return 0; | |
95 | } | |
96 | ||
71a9f22e JB |
97 | int |
98 | generic_return_value_on_stack_not (struct type *type) | |
99 | { | |
100 | return 0; | |
101 | } | |
102 | ||
bdcd319a CV |
103 | CORE_ADDR |
104 | generic_skip_trampoline_code (CORE_ADDR pc) | |
105 | { | |
106 | return 0; | |
107 | } | |
108 | ||
68e9cc94 CV |
109 | int |
110 | generic_in_solib_call_trampoline (CORE_ADDR pc, char *name) | |
111 | { | |
112 | return 0; | |
113 | } | |
114 | ||
d50355b6 MS |
115 | int |
116 | generic_in_solib_return_trampoline (CORE_ADDR pc, char *name) | |
117 | { | |
118 | return 0; | |
119 | } | |
120 | ||
c12260ac CV |
121 | int |
122 | generic_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc) | |
123 | { | |
124 | return 0; | |
125 | } | |
126 | ||
fa88f677 | 127 | const char * |
c0e8c252 AC |
128 | legacy_register_name (int i) |
129 | { | |
130 | #ifdef REGISTER_NAMES | |
131 | static char *names[] = REGISTER_NAMES; | |
132 | if (i < 0 || i >= (sizeof (names) / sizeof (*names))) | |
133 | return NULL; | |
134 | else | |
135 | return names[i]; | |
136 | #else | |
8e65ff28 AC |
137 | internal_error (__FILE__, __LINE__, |
138 | "legacy_register_name: called."); | |
c0e8c252 AC |
139 | return NULL; |
140 | #endif | |
141 | } | |
142 | ||
143 | #if defined (CALL_DUMMY) | |
144 | LONGEST legacy_call_dummy_words[] = CALL_DUMMY; | |
145 | #else | |
146 | LONGEST legacy_call_dummy_words[1]; | |
147 | #endif | |
148 | int legacy_sizeof_call_dummy_words = sizeof (legacy_call_dummy_words); | |
149 | ||
150 | void | |
f6684c31 AC |
151 | generic_remote_translate_xfer_address (struct gdbarch *gdbarch, |
152 | struct regcache *regcache, | |
153 | CORE_ADDR gdb_addr, int gdb_len, | |
c0e8c252 AC |
154 | CORE_ADDR * rem_addr, int *rem_len) |
155 | { | |
156 | *rem_addr = gdb_addr; | |
157 | *rem_len = gdb_len; | |
158 | } | |
159 | ||
dad41f9a AC |
160 | int |
161 | generic_prologue_frameless_p (CORE_ADDR ip) | |
162 | { | |
dad41f9a | 163 | return ip == SKIP_PROLOGUE (ip); |
dad41f9a AC |
164 | } |
165 | ||
2bf0cb65 EZ |
166 | /* New/multi-arched targets should use the correct gdbarch field |
167 | instead of using this global pointer. */ | |
168 | int | |
169 | legacy_print_insn (bfd_vma vma, disassemble_info *info) | |
170 | { | |
d7a27068 | 171 | return (*deprecated_tm_print_insn) (vma, info); |
2bf0cb65 | 172 | } |
dad41f9a | 173 | |
3339cf8b AC |
174 | /* Helper functions for INNER_THAN */ |
175 | ||
176 | int | |
fba45db2 | 177 | core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs) |
3339cf8b AC |
178 | { |
179 | return (lhs < rhs); | |
180 | } | |
181 | ||
182 | int | |
fba45db2 | 183 | core_addr_greaterthan (CORE_ADDR lhs, CORE_ADDR rhs) |
3339cf8b AC |
184 | { |
185 | return (lhs > rhs); | |
186 | } | |
187 | ||
188 | ||
f0d4cc9e AC |
189 | /* Helper functions for TARGET_{FLOAT,DOUBLE}_FORMAT */ |
190 | ||
191 | const struct floatformat * | |
192 | default_float_format (struct gdbarch *gdbarch) | |
193 | { | |
194 | #if GDB_MULTI_ARCH | |
195 | int byte_order = gdbarch_byte_order (gdbarch); | |
196 | #else | |
197 | int byte_order = TARGET_BYTE_ORDER; | |
198 | #endif | |
199 | switch (byte_order) | |
200 | { | |
d7449b42 | 201 | case BFD_ENDIAN_BIG: |
f0d4cc9e | 202 | return &floatformat_ieee_single_big; |
778eb05e | 203 | case BFD_ENDIAN_LITTLE: |
f0d4cc9e AC |
204 | return &floatformat_ieee_single_little; |
205 | default: | |
8e65ff28 AC |
206 | internal_error (__FILE__, __LINE__, |
207 | "default_float_format: bad byte order"); | |
f0d4cc9e AC |
208 | } |
209 | } | |
210 | ||
211 | ||
212 | const struct floatformat * | |
213 | default_double_format (struct gdbarch *gdbarch) | |
214 | { | |
215 | #if GDB_MULTI_ARCH | |
216 | int byte_order = gdbarch_byte_order (gdbarch); | |
217 | #else | |
218 | int byte_order = TARGET_BYTE_ORDER; | |
219 | #endif | |
220 | switch (byte_order) | |
221 | { | |
d7449b42 | 222 | case BFD_ENDIAN_BIG: |
f0d4cc9e | 223 | return &floatformat_ieee_double_big; |
778eb05e | 224 | case BFD_ENDIAN_LITTLE: |
f0d4cc9e AC |
225 | return &floatformat_ieee_double_little; |
226 | default: | |
8e65ff28 AC |
227 | internal_error (__FILE__, __LINE__, |
228 | "default_double_format: bad byte order"); | |
f0d4cc9e AC |
229 | } |
230 | } | |
231 | ||
193e3b1a AC |
232 | /* Misc helper functions for targets. */ |
233 | ||
234 | int | |
fba45db2 | 235 | frame_num_args_unknown (struct frame_info *fi) |
193e3b1a AC |
236 | { |
237 | return -1; | |
238 | } | |
239 | ||
240 | ||
241 | int | |
fba45db2 | 242 | generic_register_convertible_not (int num) |
193e3b1a AC |
243 | { |
244 | return 0; | |
245 | } | |
246 | ||
b4a20239 | 247 | |
c8f9d51c JB |
248 | /* Under some ABI's that specify the `struct convention' for returning |
249 | structures by value, by the time we've returned from the function, | |
250 | the return value is sitting there in the caller's buffer, but GDB | |
251 | has no way to find the address of that buffer. | |
252 | ||
253 | On such architectures, use this function as your | |
254 | extract_struct_value_address method. When asked to a struct | |
255 | returned by value in this fashion, GDB will print a nice error | |
256 | message, instead of garbage. */ | |
257 | CORE_ADDR | |
258 | generic_cannot_extract_struct_value_address (char *dummy) | |
259 | { | |
260 | return 0; | |
261 | } | |
262 | ||
f517ea4e | 263 | CORE_ADDR |
875e1767 | 264 | core_addr_identity (CORE_ADDR addr) |
f517ea4e PS |
265 | { |
266 | return addr; | |
267 | } | |
268 | ||
88c72b7d AC |
269 | int |
270 | no_op_reg_to_regnum (int reg) | |
271 | { | |
272 | return reg; | |
273 | } | |
274 | ||
e02bc4cc DS |
275 | /* Default prepare_to_procced(). */ |
276 | int | |
277 | default_prepare_to_proceed (int select_it) | |
278 | { | |
279 | return 0; | |
280 | } | |
281 | ||
282 | /* Generic prepare_to_proceed(). This one should be suitable for most | |
283 | targets that support threads. */ | |
284 | int | |
285 | generic_prepare_to_proceed (int select_it) | |
286 | { | |
39f77062 | 287 | ptid_t wait_ptid; |
e02bc4cc DS |
288 | struct target_waitstatus wait_status; |
289 | ||
290 | /* Get the last target status returned by target_wait(). */ | |
39f77062 | 291 | get_last_target_status (&wait_ptid, &wait_status); |
e02bc4cc | 292 | |
8849f47d JL |
293 | /* Make sure we were stopped either at a breakpoint, or because |
294 | of a Ctrl-C. */ | |
e02bc4cc | 295 | if (wait_status.kind != TARGET_WAITKIND_STOPPED |
8849f47d JL |
296 | || (wait_status.value.sig != TARGET_SIGNAL_TRAP && |
297 | wait_status.value.sig != TARGET_SIGNAL_INT)) | |
e02bc4cc DS |
298 | { |
299 | return 0; | |
300 | } | |
301 | ||
39f77062 KB |
302 | if (!ptid_equal (wait_ptid, minus_one_ptid) |
303 | && !ptid_equal (inferior_ptid, wait_ptid)) | |
e02bc4cc DS |
304 | { |
305 | /* Switched over from WAIT_PID. */ | |
39f77062 | 306 | CORE_ADDR wait_pc = read_pc_pid (wait_ptid); |
e02bc4cc | 307 | |
8849f47d | 308 | if (wait_pc != read_pc ()) |
e02bc4cc DS |
309 | { |
310 | if (select_it) | |
311 | { | |
8849f47d | 312 | /* Switch back to WAIT_PID thread. */ |
39f77062 | 313 | inferior_ptid = wait_ptid; |
e02bc4cc DS |
314 | |
315 | /* FIXME: This stuff came from switch_to_thread() in | |
316 | thread.c (which should probably be a public function). */ | |
317 | flush_cached_frames (); | |
318 | registers_changed (); | |
319 | stop_pc = wait_pc; | |
0f7d239c | 320 | select_frame (get_current_frame ()); |
e02bc4cc | 321 | } |
8849f47d JL |
322 | /* We return 1 to indicate that there is a breakpoint here, |
323 | so we need to step over it before continuing to avoid | |
324 | hitting it straight away. */ | |
325 | if (breakpoint_here_p (wait_pc)) | |
326 | { | |
327 | return 1; | |
328 | } | |
e02bc4cc DS |
329 | } |
330 | } | |
331 | return 0; | |
332 | ||
333 | } | |
334 | ||
97f46953 | 335 | CORE_ADDR |
10312cc4 AC |
336 | init_frame_pc_noop (int fromleaf, struct frame_info *prev) |
337 | { | |
97f46953 AC |
338 | /* Do nothing, implies return the same PC value. */ |
339 | return get_frame_pc (prev); | |
10312cc4 AC |
340 | } |
341 | ||
97f46953 | 342 | CORE_ADDR |
7824d2f2 AC |
343 | init_frame_pc_default (int fromleaf, struct frame_info *prev) |
344 | { | |
6913c89a AC |
345 | if (fromleaf && DEPRECATED_SAVED_PC_AFTER_CALL_P ()) |
346 | return DEPRECATED_SAVED_PC_AFTER_CALL (get_next_frame (prev)); | |
75e3c1f9 | 347 | else if (get_next_frame (prev) != NULL) |
8bedc050 | 348 | return DEPRECATED_FRAME_SAVED_PC (get_next_frame (prev)); |
7824d2f2 | 349 | else |
97f46953 | 350 | return read_pc (); |
7824d2f2 AC |
351 | } |
352 | ||
a2cf933a EZ |
353 | void |
354 | default_elf_make_msymbol_special (asymbol *sym, struct minimal_symbol *msym) | |
355 | { | |
356 | return; | |
357 | } | |
358 | ||
359 | void | |
360 | default_coff_make_msymbol_special (int val, struct minimal_symbol *msym) | |
361 | { | |
362 | return; | |
363 | } | |
364 | ||
01fb7433 AC |
365 | int |
366 | cannot_register_not (int regnum) | |
367 | { | |
368 | return 0; | |
369 | } | |
39d4ef09 AC |
370 | |
371 | /* Legacy version of target_virtual_frame_pointer(). Assumes that | |
0ba6dca9 AC |
372 | there is an DEPRECATED_FP_REGNUM and that it is the same, cooked or |
373 | raw. */ | |
39d4ef09 AC |
374 | |
375 | void | |
376 | legacy_virtual_frame_pointer (CORE_ADDR pc, | |
377 | int *frame_regnum, | |
378 | LONGEST *frame_offset) | |
379 | { | |
20bcf01c AC |
380 | /* FIXME: cagney/2002-09-13: This code is used when identifying the |
381 | frame pointer of the current PC. It is assuming that a single | |
382 | register and an offset can determine this. I think it should | |
383 | instead generate a byte code expression as that would work better | |
384 | with things like Dwarf2's CFI. */ | |
0ba6dca9 AC |
385 | if (DEPRECATED_FP_REGNUM >= 0 && DEPRECATED_FP_REGNUM < NUM_REGS) |
386 | *frame_regnum = DEPRECATED_FP_REGNUM; | |
20bcf01c AC |
387 | else if (SP_REGNUM >= 0 && SP_REGNUM < NUM_REGS) |
388 | *frame_regnum = SP_REGNUM; | |
389 | else | |
390 | /* Should this be an internal error? I guess so, it is reflecting | |
391 | an architectural limitation in the current design. */ | |
392 | internal_error (__FILE__, __LINE__, "No virtual frame pointer available"); | |
39d4ef09 AC |
393 | *frame_offset = 0; |
394 | } | |
46cd78fb | 395 | |
b2e75d78 AC |
396 | /* Assume the world is sane, every register's virtual and real size |
397 | is identical. */ | |
46cd78fb AC |
398 | |
399 | int | |
b2e75d78 | 400 | generic_register_size (int regnum) |
46cd78fb AC |
401 | { |
402 | gdb_assert (regnum >= 0 && regnum < NUM_REGS + NUM_PSEUDO_REGS); | |
35cac7cf AC |
403 | if (gdbarch_register_type_p (current_gdbarch)) |
404 | return TYPE_LENGTH (gdbarch_register_type (current_gdbarch, regnum)); | |
405 | else | |
406 | /* FIXME: cagney/2003-03-01: Once all architectures implement | |
407 | gdbarch_register_type(), this entire function can go away. It | |
408 | is made obsolete by register_size(). */ | |
409 | return TYPE_LENGTH (REGISTER_VIRTUAL_TYPE (regnum)); /* OK */ | |
ce29138a MS |
410 | } |
411 | ||
a7e3c2ad AC |
412 | /* Assume all registers are adjacent. */ |
413 | ||
414 | int | |
415 | generic_register_byte (int regnum) | |
416 | { | |
417 | int byte; | |
418 | int i; | |
419 | gdb_assert (regnum >= 0 && regnum < NUM_REGS + NUM_PSEUDO_REGS); | |
420 | byte = 0; | |
421 | for (i = 0; i < regnum; i++) | |
422 | { | |
0aa7e1aa | 423 | byte += generic_register_size (i); |
a7e3c2ad AC |
424 | } |
425 | return byte; | |
426 | } | |
427 | ||
d7bd68ca AC |
428 | \f |
429 | int | |
430 | legacy_pc_in_sigtramp (CORE_ADDR pc, char *name) | |
431 | { | |
db54fef4 CV |
432 | #if !defined (IN_SIGTRAMP) |
433 | if (SIGTRAMP_START_P ()) | |
434 | return (pc) >= SIGTRAMP_START (pc) && (pc) < SIGTRAMP_END (pc); | |
435 | else | |
436 | return name && strcmp ("_sigtramp", name) == 0; | |
437 | #else | |
438 | return IN_SIGTRAMP (pc, name); | |
439 | #endif | |
d7bd68ca AC |
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; |
4be87837 | 880 | info->osabi = GDB_OSABI_UNINITIALIZED; |
fb6ecb0f AC |
881 | } |
882 | ||
c0e8c252 AC |
883 | /* */ |
884 | ||
b4a20239 | 885 | extern initialize_file_ftype _initialize_gdbarch_utils; |
c0e8c252 AC |
886 | |
887 | void | |
b4a20239 | 888 | _initialize_gdbarch_utils (void) |
c0e8c252 | 889 | { |
b4a20239 AC |
890 | struct cmd_list_element *c; |
891 | c = add_set_enum_cmd ("endian", class_support, | |
892 | endian_enum, &set_endian_string, | |
893 | "Set endianness of target.", | |
894 | &setlist); | |
9f60d481 | 895 | set_cmd_sfunc (c, set_endian); |
b4a20239 AC |
896 | /* Don't use set_from_show - need to print both auto/manual and |
897 | current setting. */ | |
898 | add_cmd ("endian", class_support, show_endian, | |
899 | "Show the current byte-order", &showlist); | |
c0e8c252 | 900 | } |