Commit | Line | Data |
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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 | ||
c0e8c252 AC |
51 | /* Use the program counter to determine the contents and size |
52 | of a breakpoint instruction. If no target-dependent macro | |
53 | BREAKPOINT_FROM_PC has been defined to implement this function, | |
54 | assume that the breakpoint doesn't depend on the PC, and | |
55 | use the values of the BIG_BREAKPOINT and LITTLE_BREAKPOINT macros. | |
56 | Return a pointer to a string of bytes that encode a breakpoint | |
57 | instruction, stores the length of the string to *lenptr, | |
58 | and optionally adjust the pc to point to the correct memory location | |
59 | for inserting the breakpoint. */ | |
60 | ||
f4f9705a | 61 | const unsigned char * |
c0e8c252 AC |
62 | legacy_breakpoint_from_pc (CORE_ADDR * pcptr, int *lenptr) |
63 | { | |
64 | /* {BIG_,LITTLE_}BREAKPOINT is the sequence of bytes we insert for a | |
65 | breakpoint. On some machines, breakpoints are handled by the | |
66 | target environment and we don't have to worry about them here. */ | |
67 | #ifdef BIG_BREAKPOINT | |
d7449b42 | 68 | if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) |
c0e8c252 AC |
69 | { |
70 | static unsigned char big_break_insn[] = BIG_BREAKPOINT; | |
71 | *lenptr = sizeof (big_break_insn); | |
72 | return big_break_insn; | |
73 | } | |
74 | #endif | |
75 | #ifdef LITTLE_BREAKPOINT | |
d7449b42 | 76 | if (TARGET_BYTE_ORDER != BFD_ENDIAN_BIG) |
c0e8c252 AC |
77 | { |
78 | static unsigned char little_break_insn[] = LITTLE_BREAKPOINT; | |
79 | *lenptr = sizeof (little_break_insn); | |
80 | return little_break_insn; | |
81 | } | |
82 | #endif | |
83 | #ifdef BREAKPOINT | |
84 | { | |
85 | static unsigned char break_insn[] = BREAKPOINT; | |
86 | *lenptr = sizeof (break_insn); | |
87 | return break_insn; | |
88 | } | |
89 | #endif | |
90 | *lenptr = 0; | |
91 | return NULL; | |
92 | } | |
93 | ||
049ee0e4 AC |
94 | /* Implementation of extract return value that grubs around in the |
95 | register cache. */ | |
96 | void | |
97 | legacy_extract_return_value (struct type *type, struct regcache *regcache, | |
ebba8386 | 98 | void *valbuf) |
049ee0e4 AC |
99 | { |
100 | char *registers = deprecated_grub_regcache_for_registers (regcache); | |
ebba8386 | 101 | bfd_byte *buf = valbuf; |
524d7c18 | 102 | DEPRECATED_EXTRACT_RETURN_VALUE (type, registers, buf); /* OK */ |
049ee0e4 AC |
103 | } |
104 | ||
ebba8386 AC |
105 | /* Implementation of store return value that grubs the register cache. |
106 | Takes a local copy of the buffer to avoid const problems. */ | |
107 | void | |
108 | legacy_store_return_value (struct type *type, struct regcache *regcache, | |
109 | const void *buf) | |
110 | { | |
111 | bfd_byte *b = alloca (TYPE_LENGTH (type)); | |
112 | gdb_assert (regcache == current_regcache); | |
113 | memcpy (b, buf, TYPE_LENGTH (type)); | |
114 | DEPRECATED_STORE_RETURN_VALUE (type, b); | |
115 | } | |
116 | ||
117 | ||
4182591f AC |
118 | int |
119 | legacy_register_sim_regno (int regnum) | |
120 | { | |
121 | /* Only makes sense to supply raw registers. */ | |
122 | gdb_assert (regnum >= 0 && regnum < NUM_REGS); | |
123 | /* NOTE: cagney/2002-05-13: The old code did it this way and it is | |
124 | suspected that some GDB/SIM combinations may rely on this | |
125 | behavour. The default should be one2one_register_sim_regno | |
126 | (below). */ | |
127 | if (REGISTER_NAME (regnum) != NULL | |
128 | && REGISTER_NAME (regnum)[0] != '\0') | |
129 | return regnum; | |
130 | else | |
131 | return LEGACY_SIM_REGNO_IGNORE; | |
132 | } | |
133 | ||
c0e8c252 AC |
134 | int |
135 | generic_frameless_function_invocation_not (struct frame_info *fi) | |
136 | { | |
137 | return 0; | |
138 | } | |
139 | ||
71a9f22e JB |
140 | int |
141 | generic_return_value_on_stack_not (struct type *type) | |
142 | { | |
143 | return 0; | |
144 | } | |
145 | ||
bdcd319a CV |
146 | CORE_ADDR |
147 | generic_skip_trampoline_code (CORE_ADDR pc) | |
148 | { | |
149 | return 0; | |
150 | } | |
151 | ||
68e9cc94 CV |
152 | int |
153 | generic_in_solib_call_trampoline (CORE_ADDR pc, char *name) | |
154 | { | |
155 | return 0; | |
156 | } | |
157 | ||
d50355b6 MS |
158 | int |
159 | generic_in_solib_return_trampoline (CORE_ADDR pc, char *name) | |
160 | { | |
161 | return 0; | |
162 | } | |
163 | ||
c12260ac CV |
164 | int |
165 | generic_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc) | |
166 | { | |
167 | return 0; | |
168 | } | |
169 | ||
fa88f677 | 170 | const char * |
c0e8c252 AC |
171 | legacy_register_name (int i) |
172 | { | |
173 | #ifdef REGISTER_NAMES | |
174 | static char *names[] = REGISTER_NAMES; | |
175 | if (i < 0 || i >= (sizeof (names) / sizeof (*names))) | |
176 | return NULL; | |
177 | else | |
178 | return names[i]; | |
179 | #else | |
8e65ff28 AC |
180 | internal_error (__FILE__, __LINE__, |
181 | "legacy_register_name: called."); | |
c0e8c252 AC |
182 | return NULL; |
183 | #endif | |
184 | } | |
185 | ||
186 | #if defined (CALL_DUMMY) | |
187 | LONGEST legacy_call_dummy_words[] = CALL_DUMMY; | |
188 | #else | |
189 | LONGEST legacy_call_dummy_words[1]; | |
190 | #endif | |
191 | int legacy_sizeof_call_dummy_words = sizeof (legacy_call_dummy_words); | |
192 | ||
193 | void | |
f6684c31 AC |
194 | generic_remote_translate_xfer_address (struct gdbarch *gdbarch, |
195 | struct regcache *regcache, | |
196 | CORE_ADDR gdb_addr, int gdb_len, | |
c0e8c252 AC |
197 | CORE_ADDR * rem_addr, int *rem_len) |
198 | { | |
199 | *rem_addr = gdb_addr; | |
200 | *rem_len = gdb_len; | |
201 | } | |
202 | ||
dad41f9a AC |
203 | int |
204 | generic_prologue_frameless_p (CORE_ADDR ip) | |
205 | { | |
dad41f9a | 206 | return ip == SKIP_PROLOGUE (ip); |
dad41f9a AC |
207 | } |
208 | ||
2bf0cb65 EZ |
209 | /* New/multi-arched targets should use the correct gdbarch field |
210 | instead of using this global pointer. */ | |
211 | int | |
212 | legacy_print_insn (bfd_vma vma, disassemble_info *info) | |
213 | { | |
d7a27068 | 214 | return (*deprecated_tm_print_insn) (vma, info); |
2bf0cb65 | 215 | } |
dad41f9a | 216 | |
3339cf8b AC |
217 | /* Helper functions for INNER_THAN */ |
218 | ||
219 | int | |
fba45db2 | 220 | core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs) |
3339cf8b AC |
221 | { |
222 | return (lhs < rhs); | |
223 | } | |
224 | ||
225 | int | |
fba45db2 | 226 | core_addr_greaterthan (CORE_ADDR lhs, CORE_ADDR rhs) |
3339cf8b AC |
227 | { |
228 | return (lhs > rhs); | |
229 | } | |
230 | ||
231 | ||
f0d4cc9e AC |
232 | /* Helper functions for TARGET_{FLOAT,DOUBLE}_FORMAT */ |
233 | ||
234 | const struct floatformat * | |
235 | default_float_format (struct gdbarch *gdbarch) | |
236 | { | |
237 | #if GDB_MULTI_ARCH | |
238 | int byte_order = gdbarch_byte_order (gdbarch); | |
239 | #else | |
240 | int byte_order = TARGET_BYTE_ORDER; | |
241 | #endif | |
242 | switch (byte_order) | |
243 | { | |
d7449b42 | 244 | case BFD_ENDIAN_BIG: |
f0d4cc9e | 245 | return &floatformat_ieee_single_big; |
778eb05e | 246 | case BFD_ENDIAN_LITTLE: |
f0d4cc9e AC |
247 | return &floatformat_ieee_single_little; |
248 | default: | |
8e65ff28 AC |
249 | internal_error (__FILE__, __LINE__, |
250 | "default_float_format: bad byte order"); | |
f0d4cc9e AC |
251 | } |
252 | } | |
253 | ||
254 | ||
255 | const struct floatformat * | |
256 | default_double_format (struct gdbarch *gdbarch) | |
257 | { | |
258 | #if GDB_MULTI_ARCH | |
259 | int byte_order = gdbarch_byte_order (gdbarch); | |
260 | #else | |
261 | int byte_order = TARGET_BYTE_ORDER; | |
262 | #endif | |
263 | switch (byte_order) | |
264 | { | |
d7449b42 | 265 | case BFD_ENDIAN_BIG: |
f0d4cc9e | 266 | return &floatformat_ieee_double_big; |
778eb05e | 267 | case BFD_ENDIAN_LITTLE: |
f0d4cc9e AC |
268 | return &floatformat_ieee_double_little; |
269 | default: | |
8e65ff28 AC |
270 | internal_error (__FILE__, __LINE__, |
271 | "default_double_format: bad byte order"); | |
f0d4cc9e AC |
272 | } |
273 | } | |
274 | ||
193e3b1a AC |
275 | /* Misc helper functions for targets. */ |
276 | ||
277 | int | |
fba45db2 | 278 | frame_num_args_unknown (struct frame_info *fi) |
193e3b1a AC |
279 | { |
280 | return -1; | |
281 | } | |
282 | ||
283 | ||
284 | int | |
fba45db2 | 285 | generic_register_convertible_not (int num) |
193e3b1a AC |
286 | { |
287 | return 0; | |
288 | } | |
289 | ||
b4a20239 | 290 | |
c8f9d51c JB |
291 | /* Under some ABI's that specify the `struct convention' for returning |
292 | structures by value, by the time we've returned from the function, | |
293 | the return value is sitting there in the caller's buffer, but GDB | |
294 | has no way to find the address of that buffer. | |
295 | ||
296 | On such architectures, use this function as your | |
297 | extract_struct_value_address method. When asked to a struct | |
298 | returned by value in this fashion, GDB will print a nice error | |
299 | message, instead of garbage. */ | |
300 | CORE_ADDR | |
301 | generic_cannot_extract_struct_value_address (char *dummy) | |
302 | { | |
303 | return 0; | |
304 | } | |
305 | ||
f517ea4e | 306 | CORE_ADDR |
875e1767 | 307 | core_addr_identity (CORE_ADDR addr) |
f517ea4e PS |
308 | { |
309 | return addr; | |
310 | } | |
311 | ||
88c72b7d AC |
312 | int |
313 | no_op_reg_to_regnum (int reg) | |
314 | { | |
315 | return reg; | |
316 | } | |
317 | ||
e02bc4cc DS |
318 | /* Default prepare_to_procced(). */ |
319 | int | |
320 | default_prepare_to_proceed (int select_it) | |
321 | { | |
322 | return 0; | |
323 | } | |
324 | ||
325 | /* Generic prepare_to_proceed(). This one should be suitable for most | |
326 | targets that support threads. */ | |
327 | int | |
328 | generic_prepare_to_proceed (int select_it) | |
329 | { | |
39f77062 | 330 | ptid_t wait_ptid; |
e02bc4cc DS |
331 | struct target_waitstatus wait_status; |
332 | ||
333 | /* Get the last target status returned by target_wait(). */ | |
39f77062 | 334 | get_last_target_status (&wait_ptid, &wait_status); |
e02bc4cc | 335 | |
8849f47d JL |
336 | /* Make sure we were stopped either at a breakpoint, or because |
337 | of a Ctrl-C. */ | |
e02bc4cc | 338 | if (wait_status.kind != TARGET_WAITKIND_STOPPED |
8849f47d JL |
339 | || (wait_status.value.sig != TARGET_SIGNAL_TRAP && |
340 | wait_status.value.sig != TARGET_SIGNAL_INT)) | |
e02bc4cc DS |
341 | { |
342 | return 0; | |
343 | } | |
344 | ||
39f77062 KB |
345 | if (!ptid_equal (wait_ptid, minus_one_ptid) |
346 | && !ptid_equal (inferior_ptid, wait_ptid)) | |
e02bc4cc DS |
347 | { |
348 | /* Switched over from WAIT_PID. */ | |
39f77062 | 349 | CORE_ADDR wait_pc = read_pc_pid (wait_ptid); |
e02bc4cc | 350 | |
8849f47d | 351 | if (wait_pc != read_pc ()) |
e02bc4cc DS |
352 | { |
353 | if (select_it) | |
354 | { | |
8849f47d | 355 | /* Switch back to WAIT_PID thread. */ |
39f77062 | 356 | inferior_ptid = wait_ptid; |
e02bc4cc DS |
357 | |
358 | /* FIXME: This stuff came from switch_to_thread() in | |
359 | thread.c (which should probably be a public function). */ | |
360 | flush_cached_frames (); | |
361 | registers_changed (); | |
362 | stop_pc = wait_pc; | |
0f7d239c | 363 | select_frame (get_current_frame ()); |
e02bc4cc | 364 | } |
8849f47d JL |
365 | /* We return 1 to indicate that there is a breakpoint here, |
366 | so we need to step over it before continuing to avoid | |
367 | hitting it straight away. */ | |
368 | if (breakpoint_here_p (wait_pc)) | |
369 | { | |
370 | return 1; | |
371 | } | |
e02bc4cc DS |
372 | } |
373 | } | |
374 | return 0; | |
375 | ||
376 | } | |
377 | ||
97f46953 | 378 | CORE_ADDR |
10312cc4 AC |
379 | init_frame_pc_noop (int fromleaf, struct frame_info *prev) |
380 | { | |
97f46953 AC |
381 | /* Do nothing, implies return the same PC value. */ |
382 | return get_frame_pc (prev); | |
10312cc4 AC |
383 | } |
384 | ||
97f46953 | 385 | CORE_ADDR |
7824d2f2 AC |
386 | init_frame_pc_default (int fromleaf, struct frame_info *prev) |
387 | { | |
6913c89a AC |
388 | if (fromleaf && DEPRECATED_SAVED_PC_AFTER_CALL_P ()) |
389 | return DEPRECATED_SAVED_PC_AFTER_CALL (get_next_frame (prev)); | |
75e3c1f9 | 390 | else if (get_next_frame (prev) != NULL) |
8bedc050 | 391 | return DEPRECATED_FRAME_SAVED_PC (get_next_frame (prev)); |
7824d2f2 | 392 | else |
97f46953 | 393 | return read_pc (); |
7824d2f2 AC |
394 | } |
395 | ||
a2cf933a EZ |
396 | void |
397 | default_elf_make_msymbol_special (asymbol *sym, struct minimal_symbol *msym) | |
398 | { | |
399 | return; | |
400 | } | |
401 | ||
402 | void | |
403 | default_coff_make_msymbol_special (int val, struct minimal_symbol *msym) | |
404 | { | |
405 | return; | |
406 | } | |
407 | ||
01fb7433 AC |
408 | int |
409 | cannot_register_not (int regnum) | |
410 | { | |
411 | return 0; | |
412 | } | |
39d4ef09 AC |
413 | |
414 | /* Legacy version of target_virtual_frame_pointer(). Assumes that | |
0ba6dca9 AC |
415 | there is an DEPRECATED_FP_REGNUM and that it is the same, cooked or |
416 | raw. */ | |
39d4ef09 AC |
417 | |
418 | void | |
419 | legacy_virtual_frame_pointer (CORE_ADDR pc, | |
420 | int *frame_regnum, | |
421 | LONGEST *frame_offset) | |
422 | { | |
20bcf01c AC |
423 | /* FIXME: cagney/2002-09-13: This code is used when identifying the |
424 | frame pointer of the current PC. It is assuming that a single | |
425 | register and an offset can determine this. I think it should | |
426 | instead generate a byte code expression as that would work better | |
427 | with things like Dwarf2's CFI. */ | |
0ba6dca9 AC |
428 | if (DEPRECATED_FP_REGNUM >= 0 && DEPRECATED_FP_REGNUM < NUM_REGS) |
429 | *frame_regnum = DEPRECATED_FP_REGNUM; | |
20bcf01c AC |
430 | else if (SP_REGNUM >= 0 && SP_REGNUM < NUM_REGS) |
431 | *frame_regnum = SP_REGNUM; | |
432 | else | |
433 | /* Should this be an internal error? I guess so, it is reflecting | |
434 | an architectural limitation in the current design. */ | |
435 | internal_error (__FILE__, __LINE__, "No virtual frame pointer available"); | |
39d4ef09 AC |
436 | *frame_offset = 0; |
437 | } | |
46cd78fb | 438 | |
b2e75d78 AC |
439 | /* Assume the world is sane, every register's virtual and real size |
440 | is identical. */ | |
46cd78fb AC |
441 | |
442 | int | |
b2e75d78 | 443 | generic_register_size (int regnum) |
46cd78fb AC |
444 | { |
445 | gdb_assert (regnum >= 0 && regnum < NUM_REGS + NUM_PSEUDO_REGS); | |
35cac7cf AC |
446 | if (gdbarch_register_type_p (current_gdbarch)) |
447 | return TYPE_LENGTH (gdbarch_register_type (current_gdbarch, regnum)); | |
448 | else | |
449 | /* FIXME: cagney/2003-03-01: Once all architectures implement | |
450 | gdbarch_register_type(), this entire function can go away. It | |
451 | is made obsolete by register_size(). */ | |
452 | return TYPE_LENGTH (REGISTER_VIRTUAL_TYPE (regnum)); /* OK */ | |
ce29138a MS |
453 | } |
454 | ||
a7e3c2ad AC |
455 | /* Assume all registers are adjacent. */ |
456 | ||
457 | int | |
458 | generic_register_byte (int regnum) | |
459 | { | |
460 | int byte; | |
461 | int i; | |
462 | gdb_assert (regnum >= 0 && regnum < NUM_REGS + NUM_PSEUDO_REGS); | |
463 | byte = 0; | |
464 | for (i = 0; i < regnum; i++) | |
465 | { | |
0aa7e1aa | 466 | byte += generic_register_size (i); |
a7e3c2ad AC |
467 | } |
468 | return byte; | |
469 | } | |
470 | ||
d7bd68ca AC |
471 | \f |
472 | int | |
473 | legacy_pc_in_sigtramp (CORE_ADDR pc, char *name) | |
474 | { | |
db54fef4 CV |
475 | #if !defined (IN_SIGTRAMP) |
476 | if (SIGTRAMP_START_P ()) | |
477 | return (pc) >= SIGTRAMP_START (pc) && (pc) < SIGTRAMP_END (pc); | |
478 | else | |
479 | return name && strcmp ("_sigtramp", name) == 0; | |
480 | #else | |
481 | return IN_SIGTRAMP (pc, name); | |
482 | #endif | |
d7bd68ca AC |
483 | } |
484 | ||
13d01224 AC |
485 | int |
486 | legacy_convert_register_p (int regnum) | |
487 | { | |
488 | return REGISTER_CONVERTIBLE (regnum); | |
489 | } | |
490 | ||
491 | void | |
492 | legacy_register_to_value (int regnum, struct type *type, | |
493 | char *from, char *to) | |
494 | { | |
495 | REGISTER_CONVERT_TO_VIRTUAL (regnum, type, from, to); | |
496 | } | |
497 | ||
498 | void | |
499 | legacy_value_to_register (struct type *type, int regnum, | |
500 | char *from, char *to) | |
501 | { | |
502 | REGISTER_CONVERT_TO_RAW (type, regnum, from, to); | |
503 | } | |
504 | ||
01fb7433 | 505 | \f |
b4a20239 AC |
506 | /* Functions to manipulate the endianness of the target. */ |
507 | ||
1ba607ad | 508 | /* ``target_byte_order'' is only used when non- multi-arch. |
afe64c1a AC |
509 | Multi-arch targets obtain the current byte order using the |
510 | TARGET_BYTE_ORDER gdbarch method. | |
511 | ||
512 | The choice of initial value is entirely arbitrary. During startup, | |
513 | the function initialize_current_architecture() updates this value | |
514 | based on default byte-order information extracted from BFD. */ | |
515 | int target_byte_order = BFD_ENDIAN_BIG; | |
b4a20239 AC |
516 | int target_byte_order_auto = 1; |
517 | ||
53904c9e AC |
518 | static const char endian_big[] = "big"; |
519 | static const char endian_little[] = "little"; | |
520 | static const char endian_auto[] = "auto"; | |
521 | static const char *endian_enum[] = | |
b4a20239 AC |
522 | { |
523 | endian_big, | |
524 | endian_little, | |
525 | endian_auto, | |
526 | NULL, | |
527 | }; | |
53904c9e | 528 | static const char *set_endian_string; |
b4a20239 AC |
529 | |
530 | /* Called by ``show endian''. */ | |
531 | ||
532 | static void | |
533 | show_endian (char *args, int from_tty) | |
534 | { | |
535 | if (TARGET_BYTE_ORDER_AUTO) | |
536 | printf_unfiltered ("The target endianness is set automatically (currently %s endian)\n", | |
d7449b42 | 537 | (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little")); |
b4a20239 AC |
538 | else |
539 | printf_unfiltered ("The target is assumed to be %s endian\n", | |
d7449b42 | 540 | (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little")); |
b4a20239 AC |
541 | } |
542 | ||
543 | static void | |
544 | set_endian (char *ignore_args, int from_tty, struct cmd_list_element *c) | |
545 | { | |
3fd3d7d2 | 546 | if (set_endian_string == endian_auto) |
b4a20239 AC |
547 | { |
548 | target_byte_order_auto = 1; | |
549 | } | |
550 | else if (set_endian_string == endian_little) | |
551 | { | |
b4a20239 AC |
552 | target_byte_order_auto = 0; |
553 | if (GDB_MULTI_ARCH) | |
554 | { | |
555 | struct gdbarch_info info; | |
fb6ecb0f | 556 | gdbarch_info_init (&info); |
778eb05e | 557 | info.byte_order = BFD_ENDIAN_LITTLE; |
16f33e29 AC |
558 | if (! gdbarch_update_p (info)) |
559 | { | |
560 | printf_unfiltered ("Little endian target not supported by GDB\n"); | |
561 | } | |
b4a20239 | 562 | } |
1ba607ad AC |
563 | else |
564 | { | |
778eb05e | 565 | target_byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad | 566 | } |
b4a20239 AC |
567 | } |
568 | else if (set_endian_string == endian_big) | |
569 | { | |
b4a20239 AC |
570 | target_byte_order_auto = 0; |
571 | if (GDB_MULTI_ARCH) | |
572 | { | |
573 | struct gdbarch_info info; | |
fb6ecb0f | 574 | gdbarch_info_init (&info); |
d7449b42 | 575 | info.byte_order = BFD_ENDIAN_BIG; |
16f33e29 AC |
576 | if (! gdbarch_update_p (info)) |
577 | { | |
578 | printf_unfiltered ("Big endian target not supported by GDB\n"); | |
579 | } | |
b4a20239 | 580 | } |
1ba607ad AC |
581 | else |
582 | { | |
d7449b42 | 583 | target_byte_order = BFD_ENDIAN_BIG; |
1ba607ad | 584 | } |
b4a20239 AC |
585 | } |
586 | else | |
8e65ff28 AC |
587 | internal_error (__FILE__, __LINE__, |
588 | "set_endian: bad value"); | |
b4a20239 AC |
589 | show_endian (NULL, from_tty); |
590 | } | |
591 | ||
592 | /* Set the endianness from a BFD. */ | |
593 | ||
594 | static void | |
595 | set_endian_from_file (bfd *abfd) | |
596 | { | |
3fd3d7d2 | 597 | int want; |
1ba607ad | 598 | if (GDB_MULTI_ARCH) |
8e65ff28 AC |
599 | internal_error (__FILE__, __LINE__, |
600 | "set_endian_from_file: not for multi-arch"); | |
3fd3d7d2 AC |
601 | if (bfd_big_endian (abfd)) |
602 | want = BFD_ENDIAN_BIG; | |
b4a20239 | 603 | else |
3fd3d7d2 AC |
604 | want = BFD_ENDIAN_LITTLE; |
605 | if (TARGET_BYTE_ORDER_AUTO) | |
606 | target_byte_order = want; | |
607 | else if (TARGET_BYTE_ORDER != want) | |
608 | warning ("%s endian file does not match %s endian target.", | |
609 | want == BFD_ENDIAN_BIG ? "big" : "little", | |
610 | TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little"); | |
b4a20239 AC |
611 | } |
612 | ||
613 | ||
614 | /* Functions to manipulate the architecture of the target */ | |
615 | ||
616 | enum set_arch { set_arch_auto, set_arch_manual }; | |
617 | ||
618 | int target_architecture_auto = 1; | |
619 | ||
53904c9e | 620 | const char *set_architecture_string; |
b4a20239 AC |
621 | |
622 | /* Old way of changing the current architecture. */ | |
623 | ||
624 | extern const struct bfd_arch_info bfd_default_arch_struct; | |
625 | const struct bfd_arch_info *target_architecture = &bfd_default_arch_struct; | |
626 | int (*target_architecture_hook) (const struct bfd_arch_info *ap); | |
627 | ||
628 | static int | |
629 | arch_ok (const struct bfd_arch_info *arch) | |
630 | { | |
631 | if (GDB_MULTI_ARCH) | |
8e65ff28 AC |
632 | internal_error (__FILE__, __LINE__, |
633 | "arch_ok: not multi-arched"); | |
b4a20239 AC |
634 | /* Should be performing the more basic check that the binary is |
635 | compatible with GDB. */ | |
636 | /* Check with the target that the architecture is valid. */ | |
637 | return (target_architecture_hook == NULL | |
638 | || target_architecture_hook (arch)); | |
639 | } | |
640 | ||
641 | static void | |
642 | set_arch (const struct bfd_arch_info *arch, | |
643 | enum set_arch type) | |
644 | { | |
645 | if (GDB_MULTI_ARCH) | |
8e65ff28 AC |
646 | internal_error (__FILE__, __LINE__, |
647 | "set_arch: not multi-arched"); | |
b4a20239 AC |
648 | switch (type) |
649 | { | |
650 | case set_arch_auto: | |
651 | if (!arch_ok (arch)) | |
652 | warning ("Target may not support %s architecture", | |
653 | arch->printable_name); | |
654 | target_architecture = arch; | |
655 | break; | |
656 | case set_arch_manual: | |
657 | if (!arch_ok (arch)) | |
658 | { | |
659 | printf_unfiltered ("Target does not support `%s' architecture.\n", | |
660 | arch->printable_name); | |
661 | } | |
662 | else | |
663 | { | |
664 | target_architecture_auto = 0; | |
665 | target_architecture = arch; | |
666 | } | |
667 | break; | |
668 | } | |
669 | if (gdbarch_debug) | |
4b9b3959 | 670 | gdbarch_dump (current_gdbarch, gdb_stdlog); |
b4a20239 AC |
671 | } |
672 | ||
673 | /* Set the architecture from arch/machine (deprecated) */ | |
674 | ||
675 | void | |
676 | set_architecture_from_arch_mach (enum bfd_architecture arch, | |
677 | unsigned long mach) | |
678 | { | |
679 | const struct bfd_arch_info *wanted = bfd_lookup_arch (arch, mach); | |
680 | if (GDB_MULTI_ARCH) | |
8e65ff28 AC |
681 | internal_error (__FILE__, __LINE__, |
682 | "set_architecture_from_arch_mach: not multi-arched"); | |
b4a20239 AC |
683 | if (wanted != NULL) |
684 | set_arch (wanted, set_arch_manual); | |
685 | else | |
8e65ff28 AC |
686 | internal_error (__FILE__, __LINE__, |
687 | "gdbarch: hardwired architecture/machine not recognized"); | |
b4a20239 AC |
688 | } |
689 | ||
690 | /* Set the architecture from a BFD (deprecated) */ | |
691 | ||
692 | static void | |
693 | set_architecture_from_file (bfd *abfd) | |
694 | { | |
695 | const struct bfd_arch_info *wanted = bfd_get_arch_info (abfd); | |
696 | if (GDB_MULTI_ARCH) | |
8e65ff28 AC |
697 | internal_error (__FILE__, __LINE__, |
698 | "set_architecture_from_file: not multi-arched"); | |
b4a20239 AC |
699 | if (target_architecture_auto) |
700 | { | |
701 | set_arch (wanted, set_arch_auto); | |
702 | } | |
703 | else if (wanted != target_architecture) | |
704 | { | |
705 | warning ("%s architecture file may be incompatible with %s target.", | |
706 | wanted->printable_name, | |
707 | target_architecture->printable_name); | |
708 | } | |
709 | } | |
710 | ||
711 | ||
712 | /* Called if the user enters ``show architecture'' without an | |
713 | argument. */ | |
714 | ||
715 | static void | |
716 | show_architecture (char *args, int from_tty) | |
717 | { | |
718 | const char *arch; | |
719 | arch = TARGET_ARCHITECTURE->printable_name; | |
720 | if (target_architecture_auto) | |
721 | printf_filtered ("The target architecture is set automatically (currently %s)\n", arch); | |
722 | else | |
723 | printf_filtered ("The target architecture is assumed to be %s\n", arch); | |
724 | } | |
725 | ||
726 | ||
727 | /* Called if the user enters ``set architecture'' with or without an | |
728 | argument. */ | |
729 | ||
730 | static void | |
731 | set_architecture (char *ignore_args, int from_tty, struct cmd_list_element *c) | |
732 | { | |
733 | if (strcmp (set_architecture_string, "auto") == 0) | |
734 | { | |
735 | target_architecture_auto = 1; | |
736 | } | |
737 | else if (GDB_MULTI_ARCH) | |
738 | { | |
739 | struct gdbarch_info info; | |
fb6ecb0f | 740 | gdbarch_info_init (&info); |
b4a20239 AC |
741 | info.bfd_arch_info = bfd_scan_arch (set_architecture_string); |
742 | if (info.bfd_arch_info == NULL) | |
8e65ff28 AC |
743 | internal_error (__FILE__, __LINE__, |
744 | "set_architecture: bfd_scan_arch failed"); | |
16f33e29 | 745 | if (gdbarch_update_p (info)) |
b4a20239 AC |
746 | target_architecture_auto = 0; |
747 | else | |
ec3d358c | 748 | printf_unfiltered ("Architecture `%s' not recognized.\n", |
b4a20239 AC |
749 | set_architecture_string); |
750 | } | |
751 | else | |
752 | { | |
753 | const struct bfd_arch_info *arch | |
754 | = bfd_scan_arch (set_architecture_string); | |
755 | if (arch == NULL) | |
8e65ff28 AC |
756 | internal_error (__FILE__, __LINE__, |
757 | "set_architecture: bfd_scan_arch failed"); | |
b4a20239 AC |
758 | set_arch (arch, set_arch_manual); |
759 | } | |
760 | show_architecture (NULL, from_tty); | |
761 | } | |
762 | ||
b7d6b182 | 763 | /* Set the dynamic target-system-dependent parameters (architecture, |
b4a20239 AC |
764 | byte-order) using information found in the BFD */ |
765 | ||
766 | void | |
fba45db2 | 767 | set_gdbarch_from_file (bfd *abfd) |
b4a20239 AC |
768 | { |
769 | if (GDB_MULTI_ARCH) | |
770 | { | |
771 | struct gdbarch_info info; | |
fb6ecb0f | 772 | gdbarch_info_init (&info); |
b4a20239 | 773 | info.abfd = abfd; |
16f33e29 | 774 | if (! gdbarch_update_p (info)) |
ec3d358c | 775 | error ("Architecture of file not recognized.\n"); |
b4a20239 AC |
776 | } |
777 | else | |
778 | { | |
779 | set_architecture_from_file (abfd); | |
780 | set_endian_from_file (abfd); | |
781 | } | |
782 | } | |
783 | ||
784 | /* Initialize the current architecture. Update the ``set | |
785 | architecture'' command so that it specifies a list of valid | |
786 | architectures. */ | |
787 | ||
1ba607ad AC |
788 | #ifdef DEFAULT_BFD_ARCH |
789 | extern const bfd_arch_info_type DEFAULT_BFD_ARCH; | |
790 | static const bfd_arch_info_type *default_bfd_arch = &DEFAULT_BFD_ARCH; | |
791 | #else | |
4b9b3959 | 792 | static const bfd_arch_info_type *default_bfd_arch; |
1ba607ad AC |
793 | #endif |
794 | ||
795 | #ifdef DEFAULT_BFD_VEC | |
796 | extern const bfd_target DEFAULT_BFD_VEC; | |
797 | static const bfd_target *default_bfd_vec = &DEFAULT_BFD_VEC; | |
798 | #else | |
799 | static const bfd_target *default_bfd_vec; | |
800 | #endif | |
801 | ||
b4a20239 AC |
802 | void |
803 | initialize_current_architecture (void) | |
804 | { | |
805 | const char **arches = gdbarch_printable_names (); | |
b4a20239 | 806 | |
1ba607ad AC |
807 | /* determine a default architecture and byte order. */ |
808 | struct gdbarch_info info; | |
fb6ecb0f | 809 | gdbarch_info_init (&info); |
1ba607ad AC |
810 | |
811 | /* Find a default architecture. */ | |
812 | if (info.bfd_arch_info == NULL | |
813 | && default_bfd_arch != NULL) | |
814 | info.bfd_arch_info = default_bfd_arch; | |
815 | if (info.bfd_arch_info == NULL) | |
b4a20239 | 816 | { |
1ba607ad AC |
817 | /* Choose the architecture by taking the first one |
818 | alphabetically. */ | |
819 | const char *chosen = arches[0]; | |
b4a20239 | 820 | const char **arch; |
b4a20239 AC |
821 | for (arch = arches; *arch != NULL; arch++) |
822 | { | |
b4a20239 AC |
823 | if (strcmp (*arch, chosen) < 0) |
824 | chosen = *arch; | |
825 | } | |
826 | if (chosen == NULL) | |
8e65ff28 AC |
827 | internal_error (__FILE__, __LINE__, |
828 | "initialize_current_architecture: No arch"); | |
b4a20239 AC |
829 | info.bfd_arch_info = bfd_scan_arch (chosen); |
830 | if (info.bfd_arch_info == NULL) | |
8e65ff28 AC |
831 | internal_error (__FILE__, __LINE__, |
832 | "initialize_current_architecture: Arch not found"); | |
1ba607ad AC |
833 | } |
834 | ||
afe64c1a | 835 | /* Take several guesses at a byte order. */ |
428721aa | 836 | if (info.byte_order == BFD_ENDIAN_UNKNOWN |
1ba607ad AC |
837 | && default_bfd_vec != NULL) |
838 | { | |
839 | /* Extract BFD's default vector's byte order. */ | |
840 | switch (default_bfd_vec->byteorder) | |
841 | { | |
842 | case BFD_ENDIAN_BIG: | |
d7449b42 | 843 | info.byte_order = BFD_ENDIAN_BIG; |
1ba607ad AC |
844 | break; |
845 | case BFD_ENDIAN_LITTLE: | |
778eb05e | 846 | info.byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad AC |
847 | break; |
848 | default: | |
849 | break; | |
850 | } | |
851 | } | |
428721aa | 852 | if (info.byte_order == BFD_ENDIAN_UNKNOWN) |
1ba607ad AC |
853 | { |
854 | /* look for ``*el-*'' in the target name. */ | |
855 | const char *chp; | |
856 | chp = strchr (target_name, '-'); | |
857 | if (chp != NULL | |
858 | && chp - 2 >= target_name | |
859 | && strncmp (chp - 2, "el", 2) == 0) | |
778eb05e | 860 | info.byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad | 861 | } |
428721aa | 862 | if (info.byte_order == BFD_ENDIAN_UNKNOWN) |
1ba607ad AC |
863 | { |
864 | /* Wire it to big-endian!!! */ | |
d7449b42 | 865 | info.byte_order = BFD_ENDIAN_BIG; |
1ba607ad AC |
866 | } |
867 | ||
868 | if (GDB_MULTI_ARCH) | |
869 | { | |
16f33e29 AC |
870 | if (! gdbarch_update_p (info)) |
871 | { | |
8e65ff28 AC |
872 | internal_error (__FILE__, __LINE__, |
873 | "initialize_current_architecture: Selection of initial architecture failed"); | |
16f33e29 | 874 | } |
b4a20239 | 875 | } |
ceaa8edf | 876 | else |
afe64c1a AC |
877 | { |
878 | /* If the multi-arch logic comes up with a byte-order (from BFD) | |
879 | use it for the non-multi-arch case. */ | |
880 | if (info.byte_order != BFD_ENDIAN_UNKNOWN) | |
881 | target_byte_order = info.byte_order; | |
882 | initialize_non_multiarch (); | |
883 | } | |
b4a20239 | 884 | |
1ba607ad AC |
885 | /* Create the ``set architecture'' command appending ``auto'' to the |
886 | list of architectures. */ | |
b4a20239 AC |
887 | { |
888 | struct cmd_list_element *c; | |
889 | /* Append ``auto''. */ | |
890 | int nr; | |
891 | for (nr = 0; arches[nr] != NULL; nr++); | |
892 | arches = xrealloc (arches, sizeof (char*) * (nr + 2)); | |
893 | arches[nr + 0] = "auto"; | |
894 | arches[nr + 1] = NULL; | |
895 | /* FIXME: add_set_enum_cmd() uses an array of ``char *'' instead | |
896 | of ``const char *''. We just happen to know that the casts are | |
897 | safe. */ | |
898 | c = add_set_enum_cmd ("architecture", class_support, | |
53904c9e | 899 | arches, &set_architecture_string, |
b4a20239 AC |
900 | "Set architecture of target.", |
901 | &setlist); | |
9f60d481 | 902 | set_cmd_sfunc (c, set_architecture); |
b4a20239 AC |
903 | add_alias_cmd ("processor", "architecture", class_support, 1, &setlist); |
904 | /* Don't use set_from_show - need to print both auto/manual and | |
905 | current setting. */ | |
906 | add_cmd ("architecture", class_support, show_architecture, | |
907 | "Show the current target architecture", &showlist); | |
b4a20239 AC |
908 | } |
909 | } | |
910 | ||
911 | ||
fb6ecb0f AC |
912 | /* Initialize a gdbarch info to values that will be automatically |
913 | overridden. Note: Originally, this ``struct info'' was initialized | |
914 | using memset(0). Unfortunatly, that ran into problems, namely | |
915 | BFD_ENDIAN_BIG is zero. An explicit initialization function that | |
916 | can explicitly set each field to a well defined value is used. */ | |
917 | ||
918 | void | |
919 | gdbarch_info_init (struct gdbarch_info *info) | |
920 | { | |
921 | memset (info, 0, sizeof (struct gdbarch_info)); | |
428721aa | 922 | info->byte_order = BFD_ENDIAN_UNKNOWN; |
4be87837 | 923 | info->osabi = GDB_OSABI_UNINITIALIZED; |
fb6ecb0f AC |
924 | } |
925 | ||
c0e8c252 AC |
926 | /* */ |
927 | ||
b4a20239 | 928 | extern initialize_file_ftype _initialize_gdbarch_utils; |
c0e8c252 AC |
929 | |
930 | void | |
b4a20239 | 931 | _initialize_gdbarch_utils (void) |
c0e8c252 | 932 | { |
b4a20239 AC |
933 | struct cmd_list_element *c; |
934 | c = add_set_enum_cmd ("endian", class_support, | |
935 | endian_enum, &set_endian_string, | |
936 | "Set endianness of target.", | |
937 | &setlist); | |
9f60d481 | 938 | set_cmd_sfunc (c, set_endian); |
b4a20239 AC |
939 | /* Don't use set_from_show - need to print both auto/manual and |
940 | current setting. */ | |
941 | add_cmd ("endian", class_support, show_endian, | |
942 | "Show the current byte-order", &showlist); | |
c0e8c252 | 943 | } |