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 | |
194 | generic_remote_translate_xfer_address (CORE_ADDR gdb_addr, int gdb_len, | |
195 | CORE_ADDR * rem_addr, int *rem_len) | |
196 | { | |
197 | *rem_addr = gdb_addr; | |
198 | *rem_len = gdb_len; | |
199 | } | |
200 | ||
dad41f9a AC |
201 | int |
202 | generic_prologue_frameless_p (CORE_ADDR ip) | |
203 | { | |
dad41f9a | 204 | return ip == SKIP_PROLOGUE (ip); |
dad41f9a AC |
205 | } |
206 | ||
2bf0cb65 EZ |
207 | /* New/multi-arched targets should use the correct gdbarch field |
208 | instead of using this global pointer. */ | |
209 | int | |
210 | legacy_print_insn (bfd_vma vma, disassemble_info *info) | |
211 | { | |
212 | return (*tm_print_insn) (vma, info); | |
213 | } | |
dad41f9a | 214 | |
3339cf8b AC |
215 | /* Helper functions for INNER_THAN */ |
216 | ||
217 | int | |
fba45db2 | 218 | core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs) |
3339cf8b AC |
219 | { |
220 | return (lhs < rhs); | |
221 | } | |
222 | ||
223 | int | |
fba45db2 | 224 | core_addr_greaterthan (CORE_ADDR lhs, CORE_ADDR rhs) |
3339cf8b AC |
225 | { |
226 | return (lhs > rhs); | |
227 | } | |
228 | ||
229 | ||
f0d4cc9e AC |
230 | /* Helper functions for TARGET_{FLOAT,DOUBLE}_FORMAT */ |
231 | ||
232 | const struct floatformat * | |
233 | default_float_format (struct gdbarch *gdbarch) | |
234 | { | |
235 | #if GDB_MULTI_ARCH | |
236 | int byte_order = gdbarch_byte_order (gdbarch); | |
237 | #else | |
238 | int byte_order = TARGET_BYTE_ORDER; | |
239 | #endif | |
240 | switch (byte_order) | |
241 | { | |
d7449b42 | 242 | case BFD_ENDIAN_BIG: |
f0d4cc9e | 243 | return &floatformat_ieee_single_big; |
778eb05e | 244 | case BFD_ENDIAN_LITTLE: |
f0d4cc9e AC |
245 | return &floatformat_ieee_single_little; |
246 | default: | |
8e65ff28 AC |
247 | internal_error (__FILE__, __LINE__, |
248 | "default_float_format: bad byte order"); | |
f0d4cc9e AC |
249 | } |
250 | } | |
251 | ||
252 | ||
253 | const struct floatformat * | |
254 | default_double_format (struct gdbarch *gdbarch) | |
255 | { | |
256 | #if GDB_MULTI_ARCH | |
257 | int byte_order = gdbarch_byte_order (gdbarch); | |
258 | #else | |
259 | int byte_order = TARGET_BYTE_ORDER; | |
260 | #endif | |
261 | switch (byte_order) | |
262 | { | |
d7449b42 | 263 | case BFD_ENDIAN_BIG: |
f0d4cc9e | 264 | return &floatformat_ieee_double_big; |
778eb05e | 265 | case BFD_ENDIAN_LITTLE: |
f0d4cc9e AC |
266 | return &floatformat_ieee_double_little; |
267 | default: | |
8e65ff28 AC |
268 | internal_error (__FILE__, __LINE__, |
269 | "default_double_format: bad byte order"); | |
f0d4cc9e AC |
270 | } |
271 | } | |
272 | ||
193e3b1a AC |
273 | /* Misc helper functions for targets. */ |
274 | ||
275 | int | |
fba45db2 | 276 | frame_num_args_unknown (struct frame_info *fi) |
193e3b1a AC |
277 | { |
278 | return -1; | |
279 | } | |
280 | ||
281 | ||
282 | int | |
fba45db2 | 283 | generic_register_convertible_not (int num) |
193e3b1a AC |
284 | { |
285 | return 0; | |
286 | } | |
287 | ||
b4a20239 | 288 | |
c8f9d51c JB |
289 | /* Under some ABI's that specify the `struct convention' for returning |
290 | structures by value, by the time we've returned from the function, | |
291 | the return value is sitting there in the caller's buffer, but GDB | |
292 | has no way to find the address of that buffer. | |
293 | ||
294 | On such architectures, use this function as your | |
295 | extract_struct_value_address method. When asked to a struct | |
296 | returned by value in this fashion, GDB will print a nice error | |
297 | message, instead of garbage. */ | |
298 | CORE_ADDR | |
299 | generic_cannot_extract_struct_value_address (char *dummy) | |
300 | { | |
301 | return 0; | |
302 | } | |
303 | ||
f517ea4e | 304 | CORE_ADDR |
875e1767 | 305 | core_addr_identity (CORE_ADDR addr) |
f517ea4e PS |
306 | { |
307 | return addr; | |
308 | } | |
309 | ||
88c72b7d AC |
310 | int |
311 | no_op_reg_to_regnum (int reg) | |
312 | { | |
313 | return reg; | |
314 | } | |
315 | ||
e02bc4cc DS |
316 | /* Default prepare_to_procced(). */ |
317 | int | |
318 | default_prepare_to_proceed (int select_it) | |
319 | { | |
320 | return 0; | |
321 | } | |
322 | ||
323 | /* Generic prepare_to_proceed(). This one should be suitable for most | |
324 | targets that support threads. */ | |
325 | int | |
326 | generic_prepare_to_proceed (int select_it) | |
327 | { | |
39f77062 | 328 | ptid_t wait_ptid; |
e02bc4cc DS |
329 | struct target_waitstatus wait_status; |
330 | ||
331 | /* Get the last target status returned by target_wait(). */ | |
39f77062 | 332 | get_last_target_status (&wait_ptid, &wait_status); |
e02bc4cc | 333 | |
8849f47d JL |
334 | /* Make sure we were stopped either at a breakpoint, or because |
335 | of a Ctrl-C. */ | |
e02bc4cc | 336 | if (wait_status.kind != TARGET_WAITKIND_STOPPED |
8849f47d JL |
337 | || (wait_status.value.sig != TARGET_SIGNAL_TRAP && |
338 | wait_status.value.sig != TARGET_SIGNAL_INT)) | |
e02bc4cc DS |
339 | { |
340 | return 0; | |
341 | } | |
342 | ||
39f77062 KB |
343 | if (!ptid_equal (wait_ptid, minus_one_ptid) |
344 | && !ptid_equal (inferior_ptid, wait_ptid)) | |
e02bc4cc DS |
345 | { |
346 | /* Switched over from WAIT_PID. */ | |
39f77062 | 347 | CORE_ADDR wait_pc = read_pc_pid (wait_ptid); |
e02bc4cc | 348 | |
8849f47d | 349 | if (wait_pc != read_pc ()) |
e02bc4cc DS |
350 | { |
351 | if (select_it) | |
352 | { | |
8849f47d | 353 | /* Switch back to WAIT_PID thread. */ |
39f77062 | 354 | inferior_ptid = wait_ptid; |
e02bc4cc DS |
355 | |
356 | /* FIXME: This stuff came from switch_to_thread() in | |
357 | thread.c (which should probably be a public function). */ | |
358 | flush_cached_frames (); | |
359 | registers_changed (); | |
360 | stop_pc = wait_pc; | |
0f7d239c | 361 | select_frame (get_current_frame ()); |
e02bc4cc | 362 | } |
8849f47d JL |
363 | /* We return 1 to indicate that there is a breakpoint here, |
364 | so we need to step over it before continuing to avoid | |
365 | hitting it straight away. */ | |
366 | if (breakpoint_here_p (wait_pc)) | |
367 | { | |
368 | return 1; | |
369 | } | |
e02bc4cc DS |
370 | } |
371 | } | |
372 | return 0; | |
373 | ||
374 | } | |
375 | ||
97f46953 | 376 | CORE_ADDR |
10312cc4 AC |
377 | init_frame_pc_noop (int fromleaf, struct frame_info *prev) |
378 | { | |
97f46953 AC |
379 | /* Do nothing, implies return the same PC value. */ |
380 | return get_frame_pc (prev); | |
10312cc4 AC |
381 | } |
382 | ||
97f46953 | 383 | CORE_ADDR |
7824d2f2 AC |
384 | init_frame_pc_default (int fromleaf, struct frame_info *prev) |
385 | { | |
386 | if (fromleaf) | |
97f46953 | 387 | return SAVED_PC_AFTER_CALL (get_next_frame (prev)); |
75e3c1f9 | 388 | else if (get_next_frame (prev) != NULL) |
97f46953 | 389 | return FRAME_SAVED_PC (get_next_frame (prev)); |
7824d2f2 | 390 | else |
97f46953 | 391 | return read_pc (); |
7824d2f2 AC |
392 | } |
393 | ||
a2cf933a EZ |
394 | void |
395 | default_elf_make_msymbol_special (asymbol *sym, struct minimal_symbol *msym) | |
396 | { | |
397 | return; | |
398 | } | |
399 | ||
400 | void | |
401 | default_coff_make_msymbol_special (int val, struct minimal_symbol *msym) | |
402 | { | |
403 | return; | |
404 | } | |
405 | ||
01fb7433 AC |
406 | int |
407 | cannot_register_not (int regnum) | |
408 | { | |
409 | return 0; | |
410 | } | |
39d4ef09 AC |
411 | |
412 | /* Legacy version of target_virtual_frame_pointer(). Assumes that | |
413 | there is an FP_REGNUM and that it is the same, cooked or raw. */ | |
414 | ||
415 | void | |
416 | legacy_virtual_frame_pointer (CORE_ADDR pc, | |
417 | int *frame_regnum, | |
418 | LONGEST *frame_offset) | |
419 | { | |
20bcf01c AC |
420 | /* FIXME: cagney/2002-09-13: This code is used when identifying the |
421 | frame pointer of the current PC. It is assuming that a single | |
422 | register and an offset can determine this. I think it should | |
423 | instead generate a byte code expression as that would work better | |
424 | with things like Dwarf2's CFI. */ | |
425 | if (FP_REGNUM >= 0 && FP_REGNUM < NUM_REGS) | |
426 | *frame_regnum = FP_REGNUM; | |
427 | else if (SP_REGNUM >= 0 && SP_REGNUM < NUM_REGS) | |
428 | *frame_regnum = SP_REGNUM; | |
429 | else | |
430 | /* Should this be an internal error? I guess so, it is reflecting | |
431 | an architectural limitation in the current design. */ | |
432 | internal_error (__FILE__, __LINE__, "No virtual frame pointer available"); | |
39d4ef09 AC |
433 | *frame_offset = 0; |
434 | } | |
46cd78fb | 435 | |
b2e75d78 AC |
436 | /* Assume the world is sane, every register's virtual and real size |
437 | is identical. */ | |
46cd78fb AC |
438 | |
439 | int | |
b2e75d78 | 440 | generic_register_size (int regnum) |
46cd78fb AC |
441 | { |
442 | gdb_assert (regnum >= 0 && regnum < NUM_REGS + NUM_PSEUDO_REGS); | |
ef8570de | 443 | return TYPE_LENGTH (REGISTER_VIRTUAL_TYPE (regnum)); |
ce29138a MS |
444 | } |
445 | ||
a7e3c2ad AC |
446 | /* Assume all registers are adjacent. */ |
447 | ||
448 | int | |
449 | generic_register_byte (int regnum) | |
450 | { | |
451 | int byte; | |
452 | int i; | |
453 | gdb_assert (regnum >= 0 && regnum < NUM_REGS + NUM_PSEUDO_REGS); | |
454 | byte = 0; | |
455 | for (i = 0; i < regnum; i++) | |
456 | { | |
457 | byte += TYPE_LENGTH (REGISTER_VIRTUAL_TYPE (i)); | |
458 | } | |
459 | return byte; | |
460 | } | |
461 | ||
d7bd68ca AC |
462 | \f |
463 | int | |
464 | legacy_pc_in_sigtramp (CORE_ADDR pc, char *name) | |
465 | { | |
db54fef4 CV |
466 | #if !defined (IN_SIGTRAMP) |
467 | if (SIGTRAMP_START_P ()) | |
468 | return (pc) >= SIGTRAMP_START (pc) && (pc) < SIGTRAMP_END (pc); | |
469 | else | |
470 | return name && strcmp ("_sigtramp", name) == 0; | |
471 | #else | |
472 | return IN_SIGTRAMP (pc, name); | |
473 | #endif | |
d7bd68ca AC |
474 | } |
475 | ||
13d01224 AC |
476 | int |
477 | legacy_convert_register_p (int regnum) | |
478 | { | |
479 | return REGISTER_CONVERTIBLE (regnum); | |
480 | } | |
481 | ||
482 | void | |
483 | legacy_register_to_value (int regnum, struct type *type, | |
484 | char *from, char *to) | |
485 | { | |
486 | REGISTER_CONVERT_TO_VIRTUAL (regnum, type, from, to); | |
487 | } | |
488 | ||
489 | void | |
490 | legacy_value_to_register (struct type *type, int regnum, | |
491 | char *from, char *to) | |
492 | { | |
493 | REGISTER_CONVERT_TO_RAW (type, regnum, from, to); | |
494 | } | |
495 | ||
01fb7433 | 496 | \f |
b4a20239 AC |
497 | /* Functions to manipulate the endianness of the target. */ |
498 | ||
1ba607ad | 499 | /* ``target_byte_order'' is only used when non- multi-arch. |
afe64c1a AC |
500 | Multi-arch targets obtain the current byte order using the |
501 | TARGET_BYTE_ORDER gdbarch method. | |
502 | ||
503 | The choice of initial value is entirely arbitrary. During startup, | |
504 | the function initialize_current_architecture() updates this value | |
505 | based on default byte-order information extracted from BFD. */ | |
506 | int target_byte_order = BFD_ENDIAN_BIG; | |
b4a20239 AC |
507 | int target_byte_order_auto = 1; |
508 | ||
53904c9e AC |
509 | static const char endian_big[] = "big"; |
510 | static const char endian_little[] = "little"; | |
511 | static const char endian_auto[] = "auto"; | |
512 | static const char *endian_enum[] = | |
b4a20239 AC |
513 | { |
514 | endian_big, | |
515 | endian_little, | |
516 | endian_auto, | |
517 | NULL, | |
518 | }; | |
53904c9e | 519 | static const char *set_endian_string; |
b4a20239 AC |
520 | |
521 | /* Called by ``show endian''. */ | |
522 | ||
523 | static void | |
524 | show_endian (char *args, int from_tty) | |
525 | { | |
526 | if (TARGET_BYTE_ORDER_AUTO) | |
527 | printf_unfiltered ("The target endianness is set automatically (currently %s endian)\n", | |
d7449b42 | 528 | (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little")); |
b4a20239 AC |
529 | else |
530 | printf_unfiltered ("The target is assumed to be %s endian\n", | |
d7449b42 | 531 | (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little")); |
b4a20239 AC |
532 | } |
533 | ||
534 | static void | |
535 | set_endian (char *ignore_args, int from_tty, struct cmd_list_element *c) | |
536 | { | |
3fd3d7d2 | 537 | if (set_endian_string == endian_auto) |
b4a20239 AC |
538 | { |
539 | target_byte_order_auto = 1; | |
540 | } | |
541 | else if (set_endian_string == endian_little) | |
542 | { | |
b4a20239 AC |
543 | target_byte_order_auto = 0; |
544 | if (GDB_MULTI_ARCH) | |
545 | { | |
546 | struct gdbarch_info info; | |
fb6ecb0f | 547 | gdbarch_info_init (&info); |
778eb05e | 548 | info.byte_order = BFD_ENDIAN_LITTLE; |
16f33e29 AC |
549 | if (! gdbarch_update_p (info)) |
550 | { | |
551 | printf_unfiltered ("Little endian target not supported by GDB\n"); | |
552 | } | |
b4a20239 | 553 | } |
1ba607ad AC |
554 | else |
555 | { | |
778eb05e | 556 | target_byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad | 557 | } |
b4a20239 AC |
558 | } |
559 | else if (set_endian_string == endian_big) | |
560 | { | |
b4a20239 AC |
561 | target_byte_order_auto = 0; |
562 | if (GDB_MULTI_ARCH) | |
563 | { | |
564 | struct gdbarch_info info; | |
fb6ecb0f | 565 | gdbarch_info_init (&info); |
d7449b42 | 566 | info.byte_order = BFD_ENDIAN_BIG; |
16f33e29 AC |
567 | if (! gdbarch_update_p (info)) |
568 | { | |
569 | printf_unfiltered ("Big endian target not supported by GDB\n"); | |
570 | } | |
b4a20239 | 571 | } |
1ba607ad AC |
572 | else |
573 | { | |
d7449b42 | 574 | target_byte_order = BFD_ENDIAN_BIG; |
1ba607ad | 575 | } |
b4a20239 AC |
576 | } |
577 | else | |
8e65ff28 AC |
578 | internal_error (__FILE__, __LINE__, |
579 | "set_endian: bad value"); | |
b4a20239 AC |
580 | show_endian (NULL, from_tty); |
581 | } | |
582 | ||
583 | /* Set the endianness from a BFD. */ | |
584 | ||
585 | static void | |
586 | set_endian_from_file (bfd *abfd) | |
587 | { | |
3fd3d7d2 | 588 | int want; |
1ba607ad | 589 | if (GDB_MULTI_ARCH) |
8e65ff28 AC |
590 | internal_error (__FILE__, __LINE__, |
591 | "set_endian_from_file: not for multi-arch"); | |
3fd3d7d2 AC |
592 | if (bfd_big_endian (abfd)) |
593 | want = BFD_ENDIAN_BIG; | |
b4a20239 | 594 | else |
3fd3d7d2 AC |
595 | want = BFD_ENDIAN_LITTLE; |
596 | if (TARGET_BYTE_ORDER_AUTO) | |
597 | target_byte_order = want; | |
598 | else if (TARGET_BYTE_ORDER != want) | |
599 | warning ("%s endian file does not match %s endian target.", | |
600 | want == BFD_ENDIAN_BIG ? "big" : "little", | |
601 | TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little"); | |
b4a20239 AC |
602 | } |
603 | ||
604 | ||
605 | /* Functions to manipulate the architecture of the target */ | |
606 | ||
607 | enum set_arch { set_arch_auto, set_arch_manual }; | |
608 | ||
609 | int target_architecture_auto = 1; | |
610 | ||
53904c9e | 611 | const char *set_architecture_string; |
b4a20239 AC |
612 | |
613 | /* Old way of changing the current architecture. */ | |
614 | ||
615 | extern const struct bfd_arch_info bfd_default_arch_struct; | |
616 | const struct bfd_arch_info *target_architecture = &bfd_default_arch_struct; | |
617 | int (*target_architecture_hook) (const struct bfd_arch_info *ap); | |
618 | ||
619 | static int | |
620 | arch_ok (const struct bfd_arch_info *arch) | |
621 | { | |
622 | if (GDB_MULTI_ARCH) | |
8e65ff28 AC |
623 | internal_error (__FILE__, __LINE__, |
624 | "arch_ok: not multi-arched"); | |
b4a20239 AC |
625 | /* Should be performing the more basic check that the binary is |
626 | compatible with GDB. */ | |
627 | /* Check with the target that the architecture is valid. */ | |
628 | return (target_architecture_hook == NULL | |
629 | || target_architecture_hook (arch)); | |
630 | } | |
631 | ||
632 | static void | |
633 | set_arch (const struct bfd_arch_info *arch, | |
634 | enum set_arch type) | |
635 | { | |
636 | if (GDB_MULTI_ARCH) | |
8e65ff28 AC |
637 | internal_error (__FILE__, __LINE__, |
638 | "set_arch: not multi-arched"); | |
b4a20239 AC |
639 | switch (type) |
640 | { | |
641 | case set_arch_auto: | |
642 | if (!arch_ok (arch)) | |
643 | warning ("Target may not support %s architecture", | |
644 | arch->printable_name); | |
645 | target_architecture = arch; | |
646 | break; | |
647 | case set_arch_manual: | |
648 | if (!arch_ok (arch)) | |
649 | { | |
650 | printf_unfiltered ("Target does not support `%s' architecture.\n", | |
651 | arch->printable_name); | |
652 | } | |
653 | else | |
654 | { | |
655 | target_architecture_auto = 0; | |
656 | target_architecture = arch; | |
657 | } | |
658 | break; | |
659 | } | |
660 | if (gdbarch_debug) | |
4b9b3959 | 661 | gdbarch_dump (current_gdbarch, gdb_stdlog); |
b4a20239 AC |
662 | } |
663 | ||
664 | /* Set the architecture from arch/machine (deprecated) */ | |
665 | ||
666 | void | |
667 | set_architecture_from_arch_mach (enum bfd_architecture arch, | |
668 | unsigned long mach) | |
669 | { | |
670 | const struct bfd_arch_info *wanted = bfd_lookup_arch (arch, mach); | |
671 | if (GDB_MULTI_ARCH) | |
8e65ff28 AC |
672 | internal_error (__FILE__, __LINE__, |
673 | "set_architecture_from_arch_mach: not multi-arched"); | |
b4a20239 AC |
674 | if (wanted != NULL) |
675 | set_arch (wanted, set_arch_manual); | |
676 | else | |
8e65ff28 AC |
677 | internal_error (__FILE__, __LINE__, |
678 | "gdbarch: hardwired architecture/machine not recognized"); | |
b4a20239 AC |
679 | } |
680 | ||
681 | /* Set the architecture from a BFD (deprecated) */ | |
682 | ||
683 | static void | |
684 | set_architecture_from_file (bfd *abfd) | |
685 | { | |
686 | const struct bfd_arch_info *wanted = bfd_get_arch_info (abfd); | |
687 | if (GDB_MULTI_ARCH) | |
8e65ff28 AC |
688 | internal_error (__FILE__, __LINE__, |
689 | "set_architecture_from_file: not multi-arched"); | |
b4a20239 AC |
690 | if (target_architecture_auto) |
691 | { | |
692 | set_arch (wanted, set_arch_auto); | |
693 | } | |
694 | else if (wanted != target_architecture) | |
695 | { | |
696 | warning ("%s architecture file may be incompatible with %s target.", | |
697 | wanted->printable_name, | |
698 | target_architecture->printable_name); | |
699 | } | |
700 | } | |
701 | ||
702 | ||
703 | /* Called if the user enters ``show architecture'' without an | |
704 | argument. */ | |
705 | ||
706 | static void | |
707 | show_architecture (char *args, int from_tty) | |
708 | { | |
709 | const char *arch; | |
710 | arch = TARGET_ARCHITECTURE->printable_name; | |
711 | if (target_architecture_auto) | |
712 | printf_filtered ("The target architecture is set automatically (currently %s)\n", arch); | |
713 | else | |
714 | printf_filtered ("The target architecture is assumed to be %s\n", arch); | |
715 | } | |
716 | ||
717 | ||
718 | /* Called if the user enters ``set architecture'' with or without an | |
719 | argument. */ | |
720 | ||
721 | static void | |
722 | set_architecture (char *ignore_args, int from_tty, struct cmd_list_element *c) | |
723 | { | |
724 | if (strcmp (set_architecture_string, "auto") == 0) | |
725 | { | |
726 | target_architecture_auto = 1; | |
727 | } | |
728 | else if (GDB_MULTI_ARCH) | |
729 | { | |
730 | struct gdbarch_info info; | |
fb6ecb0f | 731 | gdbarch_info_init (&info); |
b4a20239 AC |
732 | info.bfd_arch_info = bfd_scan_arch (set_architecture_string); |
733 | if (info.bfd_arch_info == NULL) | |
8e65ff28 AC |
734 | internal_error (__FILE__, __LINE__, |
735 | "set_architecture: bfd_scan_arch failed"); | |
16f33e29 | 736 | if (gdbarch_update_p (info)) |
b4a20239 AC |
737 | target_architecture_auto = 0; |
738 | else | |
ec3d358c | 739 | printf_unfiltered ("Architecture `%s' not recognized.\n", |
b4a20239 AC |
740 | set_architecture_string); |
741 | } | |
742 | else | |
743 | { | |
744 | const struct bfd_arch_info *arch | |
745 | = bfd_scan_arch (set_architecture_string); | |
746 | if (arch == NULL) | |
8e65ff28 AC |
747 | internal_error (__FILE__, __LINE__, |
748 | "set_architecture: bfd_scan_arch failed"); | |
b4a20239 AC |
749 | set_arch (arch, set_arch_manual); |
750 | } | |
751 | show_architecture (NULL, from_tty); | |
752 | } | |
753 | ||
b7d6b182 | 754 | /* Set the dynamic target-system-dependent parameters (architecture, |
b4a20239 AC |
755 | byte-order) using information found in the BFD */ |
756 | ||
757 | void | |
fba45db2 | 758 | set_gdbarch_from_file (bfd *abfd) |
b4a20239 AC |
759 | { |
760 | if (GDB_MULTI_ARCH) | |
761 | { | |
762 | struct gdbarch_info info; | |
fb6ecb0f | 763 | gdbarch_info_init (&info); |
b4a20239 | 764 | info.abfd = abfd; |
16f33e29 | 765 | if (! gdbarch_update_p (info)) |
ec3d358c | 766 | error ("Architecture of file not recognized.\n"); |
b4a20239 AC |
767 | } |
768 | else | |
769 | { | |
770 | set_architecture_from_file (abfd); | |
771 | set_endian_from_file (abfd); | |
772 | } | |
773 | } | |
774 | ||
775 | /* Initialize the current architecture. Update the ``set | |
776 | architecture'' command so that it specifies a list of valid | |
777 | architectures. */ | |
778 | ||
1ba607ad AC |
779 | #ifdef DEFAULT_BFD_ARCH |
780 | extern const bfd_arch_info_type DEFAULT_BFD_ARCH; | |
781 | static const bfd_arch_info_type *default_bfd_arch = &DEFAULT_BFD_ARCH; | |
782 | #else | |
4b9b3959 | 783 | static const bfd_arch_info_type *default_bfd_arch; |
1ba607ad AC |
784 | #endif |
785 | ||
786 | #ifdef DEFAULT_BFD_VEC | |
787 | extern const bfd_target DEFAULT_BFD_VEC; | |
788 | static const bfd_target *default_bfd_vec = &DEFAULT_BFD_VEC; | |
789 | #else | |
790 | static const bfd_target *default_bfd_vec; | |
791 | #endif | |
792 | ||
b4a20239 AC |
793 | void |
794 | initialize_current_architecture (void) | |
795 | { | |
796 | const char **arches = gdbarch_printable_names (); | |
b4a20239 | 797 | |
1ba607ad AC |
798 | /* determine a default architecture and byte order. */ |
799 | struct gdbarch_info info; | |
fb6ecb0f | 800 | gdbarch_info_init (&info); |
1ba607ad AC |
801 | |
802 | /* Find a default architecture. */ | |
803 | if (info.bfd_arch_info == NULL | |
804 | && default_bfd_arch != NULL) | |
805 | info.bfd_arch_info = default_bfd_arch; | |
806 | if (info.bfd_arch_info == NULL) | |
b4a20239 | 807 | { |
1ba607ad AC |
808 | /* Choose the architecture by taking the first one |
809 | alphabetically. */ | |
810 | const char *chosen = arches[0]; | |
b4a20239 | 811 | const char **arch; |
b4a20239 AC |
812 | for (arch = arches; *arch != NULL; arch++) |
813 | { | |
b4a20239 AC |
814 | if (strcmp (*arch, chosen) < 0) |
815 | chosen = *arch; | |
816 | } | |
817 | if (chosen == NULL) | |
8e65ff28 AC |
818 | internal_error (__FILE__, __LINE__, |
819 | "initialize_current_architecture: No arch"); | |
b4a20239 AC |
820 | info.bfd_arch_info = bfd_scan_arch (chosen); |
821 | if (info.bfd_arch_info == NULL) | |
8e65ff28 AC |
822 | internal_error (__FILE__, __LINE__, |
823 | "initialize_current_architecture: Arch not found"); | |
1ba607ad AC |
824 | } |
825 | ||
afe64c1a | 826 | /* Take several guesses at a byte order. */ |
428721aa | 827 | if (info.byte_order == BFD_ENDIAN_UNKNOWN |
1ba607ad AC |
828 | && default_bfd_vec != NULL) |
829 | { | |
830 | /* Extract BFD's default vector's byte order. */ | |
831 | switch (default_bfd_vec->byteorder) | |
832 | { | |
833 | case BFD_ENDIAN_BIG: | |
d7449b42 | 834 | info.byte_order = BFD_ENDIAN_BIG; |
1ba607ad AC |
835 | break; |
836 | case BFD_ENDIAN_LITTLE: | |
778eb05e | 837 | info.byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad AC |
838 | break; |
839 | default: | |
840 | break; | |
841 | } | |
842 | } | |
428721aa | 843 | if (info.byte_order == BFD_ENDIAN_UNKNOWN) |
1ba607ad AC |
844 | { |
845 | /* look for ``*el-*'' in the target name. */ | |
846 | const char *chp; | |
847 | chp = strchr (target_name, '-'); | |
848 | if (chp != NULL | |
849 | && chp - 2 >= target_name | |
850 | && strncmp (chp - 2, "el", 2) == 0) | |
778eb05e | 851 | info.byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad | 852 | } |
428721aa | 853 | if (info.byte_order == BFD_ENDIAN_UNKNOWN) |
1ba607ad AC |
854 | { |
855 | /* Wire it to big-endian!!! */ | |
d7449b42 | 856 | info.byte_order = BFD_ENDIAN_BIG; |
1ba607ad AC |
857 | } |
858 | ||
859 | if (GDB_MULTI_ARCH) | |
860 | { | |
16f33e29 AC |
861 | if (! gdbarch_update_p (info)) |
862 | { | |
8e65ff28 AC |
863 | internal_error (__FILE__, __LINE__, |
864 | "initialize_current_architecture: Selection of initial architecture failed"); | |
16f33e29 | 865 | } |
b4a20239 | 866 | } |
ceaa8edf | 867 | else |
afe64c1a AC |
868 | { |
869 | /* If the multi-arch logic comes up with a byte-order (from BFD) | |
870 | use it for the non-multi-arch case. */ | |
871 | if (info.byte_order != BFD_ENDIAN_UNKNOWN) | |
872 | target_byte_order = info.byte_order; | |
873 | initialize_non_multiarch (); | |
874 | } | |
b4a20239 | 875 | |
1ba607ad AC |
876 | /* Create the ``set architecture'' command appending ``auto'' to the |
877 | list of architectures. */ | |
b4a20239 AC |
878 | { |
879 | struct cmd_list_element *c; | |
880 | /* Append ``auto''. */ | |
881 | int nr; | |
882 | for (nr = 0; arches[nr] != NULL; nr++); | |
883 | arches = xrealloc (arches, sizeof (char*) * (nr + 2)); | |
884 | arches[nr + 0] = "auto"; | |
885 | arches[nr + 1] = NULL; | |
886 | /* FIXME: add_set_enum_cmd() uses an array of ``char *'' instead | |
887 | of ``const char *''. We just happen to know that the casts are | |
888 | safe. */ | |
889 | c = add_set_enum_cmd ("architecture", class_support, | |
53904c9e | 890 | arches, &set_architecture_string, |
b4a20239 AC |
891 | "Set architecture of target.", |
892 | &setlist); | |
9f60d481 | 893 | set_cmd_sfunc (c, set_architecture); |
b4a20239 AC |
894 | add_alias_cmd ("processor", "architecture", class_support, 1, &setlist); |
895 | /* Don't use set_from_show - need to print both auto/manual and | |
896 | current setting. */ | |
897 | add_cmd ("architecture", class_support, show_architecture, | |
898 | "Show the current target architecture", &showlist); | |
b4a20239 AC |
899 | } |
900 | } | |
901 | ||
902 | ||
fb6ecb0f AC |
903 | /* Initialize a gdbarch info to values that will be automatically |
904 | overridden. Note: Originally, this ``struct info'' was initialized | |
905 | using memset(0). Unfortunatly, that ran into problems, namely | |
906 | BFD_ENDIAN_BIG is zero. An explicit initialization function that | |
907 | can explicitly set each field to a well defined value is used. */ | |
908 | ||
909 | void | |
910 | gdbarch_info_init (struct gdbarch_info *info) | |
911 | { | |
912 | memset (info, 0, sizeof (struct gdbarch_info)); | |
428721aa | 913 | info->byte_order = BFD_ENDIAN_UNKNOWN; |
4be87837 | 914 | info->osabi = GDB_OSABI_UNINITIALIZED; |
fb6ecb0f AC |
915 | } |
916 | ||
c0e8c252 AC |
917 | /* */ |
918 | ||
b4a20239 | 919 | extern initialize_file_ftype _initialize_gdbarch_utils; |
c0e8c252 AC |
920 | |
921 | void | |
b4a20239 | 922 | _initialize_gdbarch_utils (void) |
c0e8c252 | 923 | { |
b4a20239 AC |
924 | struct cmd_list_element *c; |
925 | c = add_set_enum_cmd ("endian", class_support, | |
926 | endian_enum, &set_endian_string, | |
927 | "Set endianness of target.", | |
928 | &setlist); | |
9f60d481 | 929 | set_cmd_sfunc (c, set_endian); |
b4a20239 AC |
930 | /* Don't use set_from_show - need to print both auto/manual and |
931 | current setting. */ | |
932 | add_cmd ("endian", class_support, show_endian, | |
933 | "Show the current byte-order", &showlist); | |
c0e8c252 | 934 | } |