Commit | Line | Data |
---|---|---|
c0e8c252 | 1 | /* Dynamic architecture support for GDB, the GNU debugger. |
f4f9705a | 2 | |
750eb019 AC |
3 | Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free Software |
4 | Foundation, 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 | ||
fb6ecb0f | 25 | #include "arch-utils.h" |
192cb3d4 | 26 | #include "buildsym.h" |
c0e8c252 AC |
27 | #include "gdbcmd.h" |
28 | #include "inferior.h" /* enum CALL_DUMMY_LOCATION et.al. */ | |
5f8a3188 | 29 | #include "gdb_string.h" |
fbec36e2 | 30 | #include "regcache.h" |
39d4ef09 | 31 | #include "gdb_assert.h" |
4182591f | 32 | #include "sim-regno.h" |
750eb019 | 33 | #include "gdbcore.h" |
bf922ad9 AC |
34 | #include "osabi.h" |
35 | ||
1ba607ad AC |
36 | #include "version.h" |
37 | ||
f0d4cc9e AC |
38 | #include "floatformat.h" |
39 | ||
049ee0e4 AC |
40 | /* Implementation of extract return value that grubs around in the |
41 | register cache. */ | |
42 | void | |
43 | legacy_extract_return_value (struct type *type, struct regcache *regcache, | |
ebba8386 | 44 | void *valbuf) |
049ee0e4 AC |
45 | { |
46 | char *registers = deprecated_grub_regcache_for_registers (regcache); | |
ebba8386 | 47 | bfd_byte *buf = valbuf; |
524d7c18 | 48 | DEPRECATED_EXTRACT_RETURN_VALUE (type, registers, buf); /* OK */ |
049ee0e4 AC |
49 | } |
50 | ||
ebba8386 AC |
51 | /* Implementation of store return value that grubs the register cache. |
52 | Takes a local copy of the buffer to avoid const problems. */ | |
53 | void | |
54 | legacy_store_return_value (struct type *type, struct regcache *regcache, | |
55 | const void *buf) | |
56 | { | |
57 | bfd_byte *b = alloca (TYPE_LENGTH (type)); | |
58 | gdb_assert (regcache == current_regcache); | |
59 | memcpy (b, buf, TYPE_LENGTH (type)); | |
60 | DEPRECATED_STORE_RETURN_VALUE (type, b); | |
61 | } | |
62 | ||
1fd35568 JB |
63 | int |
64 | always_use_struct_convention (int gcc_p, struct type *value_type) | |
65 | { | |
66 | return 1; | |
67 | } | |
68 | ||
750eb019 AC |
69 | enum return_value_convention |
70 | legacy_return_value (struct gdbarch *gdbarch, struct type *valtype, | |
71 | struct regcache *regcache, void *readbuf, | |
72 | const void *writebuf) | |
73 | { | |
74 | /* NOTE: cagney/2004-06-13: The gcc_p parameter to | |
75 | USE_STRUCT_CONVENTION isn't used. */ | |
76 | int struct_return = ((TYPE_CODE (valtype) == TYPE_CODE_STRUCT | |
77 | || TYPE_CODE (valtype) == TYPE_CODE_UNION | |
78 | || TYPE_CODE (valtype) == TYPE_CODE_ARRAY) | |
79 | && DEPRECATED_USE_STRUCT_CONVENTION (0, valtype)); | |
80 | ||
81 | if (writebuf != NULL) | |
82 | { | |
83 | gdb_assert (!struct_return); | |
84 | /* NOTE: cagney/2004-06-13: See stack.c:return_command. Old | |
85 | architectures don't expect STORE_RETURN_VALUE to handle small | |
86 | structures. Should not be called with such types. */ | |
87 | gdb_assert (TYPE_CODE (valtype) != TYPE_CODE_STRUCT | |
88 | && TYPE_CODE (valtype) != TYPE_CODE_UNION); | |
89 | STORE_RETURN_VALUE (valtype, regcache, writebuf); | |
90 | } | |
91 | ||
92 | if (readbuf != NULL) | |
93 | { | |
94 | gdb_assert (!struct_return); | |
95 | EXTRACT_RETURN_VALUE (valtype, regcache, readbuf); | |
96 | } | |
97 | ||
98 | if (struct_return) | |
99 | return RETURN_VALUE_STRUCT_CONVENTION; | |
100 | else | |
101 | return RETURN_VALUE_REGISTER_CONVENTION; | |
102 | } | |
1fd35568 | 103 | |
4182591f AC |
104 | int |
105 | legacy_register_sim_regno (int regnum) | |
106 | { | |
107 | /* Only makes sense to supply raw registers. */ | |
108 | gdb_assert (regnum >= 0 && regnum < NUM_REGS); | |
109 | /* NOTE: cagney/2002-05-13: The old code did it this way and it is | |
110 | suspected that some GDB/SIM combinations may rely on this | |
111 | behavour. The default should be one2one_register_sim_regno | |
112 | (below). */ | |
113 | if (REGISTER_NAME (regnum) != NULL | |
114 | && REGISTER_NAME (regnum)[0] != '\0') | |
115 | return regnum; | |
116 | else | |
117 | return LEGACY_SIM_REGNO_IGNORE; | |
118 | } | |
119 | ||
bdcd319a CV |
120 | CORE_ADDR |
121 | generic_skip_trampoline_code (CORE_ADDR pc) | |
122 | { | |
123 | return 0; | |
124 | } | |
125 | ||
dea0c52f | 126 | CORE_ADDR |
4c8c40e6 | 127 | generic_skip_solib_resolver (struct gdbarch *gdbarch, CORE_ADDR pc) |
dea0c52f MK |
128 | { |
129 | return 0; | |
130 | } | |
131 | ||
68e9cc94 CV |
132 | int |
133 | generic_in_solib_call_trampoline (CORE_ADDR pc, char *name) | |
134 | { | |
135 | return 0; | |
136 | } | |
137 | ||
d50355b6 MS |
138 | int |
139 | generic_in_solib_return_trampoline (CORE_ADDR pc, char *name) | |
140 | { | |
141 | return 0; | |
142 | } | |
143 | ||
c12260ac CV |
144 | int |
145 | generic_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc) | |
146 | { | |
147 | return 0; | |
148 | } | |
149 | ||
c0e8c252 | 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 | ||
3339cf8b AC |
160 | /* Helper functions for INNER_THAN */ |
161 | ||
162 | int | |
fba45db2 | 163 | core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs) |
3339cf8b AC |
164 | { |
165 | return (lhs < rhs); | |
166 | } | |
167 | ||
168 | int | |
fba45db2 | 169 | core_addr_greaterthan (CORE_ADDR lhs, CORE_ADDR rhs) |
3339cf8b AC |
170 | { |
171 | return (lhs > rhs); | |
172 | } | |
173 | ||
174 | ||
f0d4cc9e AC |
175 | /* Helper functions for TARGET_{FLOAT,DOUBLE}_FORMAT */ |
176 | ||
177 | const struct floatformat * | |
178 | default_float_format (struct gdbarch *gdbarch) | |
179 | { | |
f0d4cc9e | 180 | int byte_order = gdbarch_byte_order (gdbarch); |
f0d4cc9e AC |
181 | switch (byte_order) |
182 | { | |
d7449b42 | 183 | case BFD_ENDIAN_BIG: |
f0d4cc9e | 184 | return &floatformat_ieee_single_big; |
778eb05e | 185 | case BFD_ENDIAN_LITTLE: |
f0d4cc9e AC |
186 | return &floatformat_ieee_single_little; |
187 | default: | |
8e65ff28 AC |
188 | internal_error (__FILE__, __LINE__, |
189 | "default_float_format: bad byte order"); | |
f0d4cc9e AC |
190 | } |
191 | } | |
192 | ||
193 | ||
194 | const struct floatformat * | |
195 | default_double_format (struct gdbarch *gdbarch) | |
196 | { | |
f0d4cc9e | 197 | int byte_order = gdbarch_byte_order (gdbarch); |
f0d4cc9e AC |
198 | switch (byte_order) |
199 | { | |
d7449b42 | 200 | case BFD_ENDIAN_BIG: |
f0d4cc9e | 201 | return &floatformat_ieee_double_big; |
778eb05e | 202 | case BFD_ENDIAN_LITTLE: |
f0d4cc9e AC |
203 | return &floatformat_ieee_double_little; |
204 | default: | |
8e65ff28 AC |
205 | internal_error (__FILE__, __LINE__, |
206 | "default_double_format: bad byte order"); | |
f0d4cc9e AC |
207 | } |
208 | } | |
209 | ||
193e3b1a AC |
210 | /* Misc helper functions for targets. */ |
211 | ||
f517ea4e | 212 | CORE_ADDR |
875e1767 | 213 | core_addr_identity (CORE_ADDR addr) |
f517ea4e PS |
214 | { |
215 | return addr; | |
216 | } | |
217 | ||
e2d0e7eb AC |
218 | CORE_ADDR |
219 | convert_from_func_ptr_addr_identity (struct gdbarch *gdbarch, CORE_ADDR addr, | |
220 | struct target_ops *targ) | |
221 | { | |
222 | return addr; | |
223 | } | |
224 | ||
88c72b7d AC |
225 | int |
226 | no_op_reg_to_regnum (int reg) | |
227 | { | |
228 | return reg; | |
229 | } | |
230 | ||
97f46953 | 231 | CORE_ADDR |
0968aa8c | 232 | deprecated_init_frame_pc_default (int fromleaf, struct frame_info *prev) |
7824d2f2 | 233 | { |
6913c89a AC |
234 | if (fromleaf && DEPRECATED_SAVED_PC_AFTER_CALL_P ()) |
235 | return DEPRECATED_SAVED_PC_AFTER_CALL (get_next_frame (prev)); | |
75e3c1f9 | 236 | else if (get_next_frame (prev) != NULL) |
8bedc050 | 237 | return DEPRECATED_FRAME_SAVED_PC (get_next_frame (prev)); |
7824d2f2 | 238 | else |
97f46953 | 239 | return read_pc (); |
7824d2f2 AC |
240 | } |
241 | ||
a2cf933a EZ |
242 | void |
243 | default_elf_make_msymbol_special (asymbol *sym, struct minimal_symbol *msym) | |
244 | { | |
245 | return; | |
246 | } | |
247 | ||
248 | void | |
249 | default_coff_make_msymbol_special (int val, struct minimal_symbol *msym) | |
250 | { | |
251 | return; | |
252 | } | |
253 | ||
01fb7433 AC |
254 | int |
255 | cannot_register_not (int regnum) | |
256 | { | |
257 | return 0; | |
258 | } | |
39d4ef09 AC |
259 | |
260 | /* Legacy version of target_virtual_frame_pointer(). Assumes that | |
0ba6dca9 AC |
261 | there is an DEPRECATED_FP_REGNUM and that it is the same, cooked or |
262 | raw. */ | |
39d4ef09 AC |
263 | |
264 | void | |
265 | legacy_virtual_frame_pointer (CORE_ADDR pc, | |
266 | int *frame_regnum, | |
267 | LONGEST *frame_offset) | |
268 | { | |
20bcf01c AC |
269 | /* FIXME: cagney/2002-09-13: This code is used when identifying the |
270 | frame pointer of the current PC. It is assuming that a single | |
271 | register and an offset can determine this. I think it should | |
272 | instead generate a byte code expression as that would work better | |
273 | with things like Dwarf2's CFI. */ | |
0ba6dca9 AC |
274 | if (DEPRECATED_FP_REGNUM >= 0 && DEPRECATED_FP_REGNUM < NUM_REGS) |
275 | *frame_regnum = DEPRECATED_FP_REGNUM; | |
20bcf01c AC |
276 | else if (SP_REGNUM >= 0 && SP_REGNUM < NUM_REGS) |
277 | *frame_regnum = SP_REGNUM; | |
278 | else | |
279 | /* Should this be an internal error? I guess so, it is reflecting | |
280 | an architectural limitation in the current design. */ | |
281 | internal_error (__FILE__, __LINE__, "No virtual frame pointer available"); | |
39d4ef09 AC |
282 | *frame_offset = 0; |
283 | } | |
46cd78fb | 284 | |
b2e75d78 AC |
285 | /* Assume the world is sane, every register's virtual and real size |
286 | is identical. */ | |
46cd78fb AC |
287 | |
288 | int | |
b2e75d78 | 289 | generic_register_size (int regnum) |
46cd78fb AC |
290 | { |
291 | gdb_assert (regnum >= 0 && regnum < NUM_REGS + NUM_PSEUDO_REGS); | |
35cac7cf AC |
292 | if (gdbarch_register_type_p (current_gdbarch)) |
293 | return TYPE_LENGTH (gdbarch_register_type (current_gdbarch, regnum)); | |
294 | else | |
295 | /* FIXME: cagney/2003-03-01: Once all architectures implement | |
296 | gdbarch_register_type(), this entire function can go away. It | |
297 | is made obsolete by register_size(). */ | |
2e092625 | 298 | return TYPE_LENGTH (DEPRECATED_REGISTER_VIRTUAL_TYPE (regnum)); /* OK */ |
ce29138a MS |
299 | } |
300 | ||
a7e3c2ad AC |
301 | /* Assume all registers are adjacent. */ |
302 | ||
303 | int | |
304 | generic_register_byte (int regnum) | |
305 | { | |
306 | int byte; | |
307 | int i; | |
308 | gdb_assert (regnum >= 0 && regnum < NUM_REGS + NUM_PSEUDO_REGS); | |
309 | byte = 0; | |
310 | for (i = 0; i < regnum; i++) | |
311 | { | |
0aa7e1aa | 312 | byte += generic_register_size (i); |
a7e3c2ad AC |
313 | } |
314 | return byte; | |
315 | } | |
316 | ||
d7bd68ca AC |
317 | \f |
318 | int | |
319 | legacy_pc_in_sigtramp (CORE_ADDR pc, char *name) | |
320 | { | |
8c6b0e06 | 321 | #if defined (DEPRECATED_IN_SIGTRAMP) |
dbfe4626 | 322 | return DEPRECATED_IN_SIGTRAMP (pc, name); |
8c6b0e06 AC |
323 | #else |
324 | return name && strcmp ("_sigtramp", name) == 0; | |
db54fef4 | 325 | #endif |
d7bd68ca AC |
326 | } |
327 | ||
13d01224 | 328 | int |
a1f4a1b6 | 329 | generic_convert_register_p (int regnum, struct type *type) |
13d01224 | 330 | { |
9730f241 | 331 | return 0; |
13d01224 AC |
332 | } |
333 | ||
192cb3d4 MK |
334 | int |
335 | default_stabs_argument_has_addr (struct gdbarch *gdbarch, struct type *type) | |
336 | { | |
337 | if (DEPRECATED_REG_STRUCT_HAS_ADDR_P () | |
338 | && DEPRECATED_REG_STRUCT_HAS_ADDR (processing_gcc_compilation, type)) | |
339 | { | |
340 | CHECK_TYPEDEF (type); | |
341 | ||
342 | return (TYPE_CODE (type) == TYPE_CODE_STRUCT | |
343 | || TYPE_CODE (type) == TYPE_CODE_UNION | |
344 | || TYPE_CODE (type) == TYPE_CODE_SET | |
345 | || TYPE_CODE (type) == TYPE_CODE_BITSTRING); | |
346 | } | |
347 | ||
348 | return 0; | |
349 | } | |
350 | ||
01fb7433 | 351 | \f |
b4a20239 AC |
352 | /* Functions to manipulate the endianness of the target. */ |
353 | ||
1ba607ad | 354 | /* ``target_byte_order'' is only used when non- multi-arch. |
afe64c1a AC |
355 | Multi-arch targets obtain the current byte order using the |
356 | TARGET_BYTE_ORDER gdbarch method. | |
357 | ||
358 | The choice of initial value is entirely arbitrary. During startup, | |
359 | the function initialize_current_architecture() updates this value | |
360 | based on default byte-order information extracted from BFD. */ | |
a8cf2722 AC |
361 | static int target_byte_order = BFD_ENDIAN_BIG; |
362 | static int target_byte_order_auto = 1; | |
363 | ||
364 | enum bfd_endian | |
365 | selected_byte_order (void) | |
366 | { | |
367 | if (target_byte_order_auto) | |
368 | return BFD_ENDIAN_UNKNOWN; | |
369 | else | |
370 | return target_byte_order; | |
371 | } | |
b4a20239 | 372 | |
53904c9e AC |
373 | static const char endian_big[] = "big"; |
374 | static const char endian_little[] = "little"; | |
375 | static const char endian_auto[] = "auto"; | |
376 | static const char *endian_enum[] = | |
b4a20239 AC |
377 | { |
378 | endian_big, | |
379 | endian_little, | |
380 | endian_auto, | |
381 | NULL, | |
382 | }; | |
53904c9e | 383 | static const char *set_endian_string; |
b4a20239 AC |
384 | |
385 | /* Called by ``show endian''. */ | |
386 | ||
387 | static void | |
388 | show_endian (char *args, int from_tty) | |
389 | { | |
a8cf2722 | 390 | if (target_byte_order_auto) |
b4a20239 | 391 | printf_unfiltered ("The target endianness is set automatically (currently %s endian)\n", |
d7449b42 | 392 | (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little")); |
b4a20239 AC |
393 | else |
394 | printf_unfiltered ("The target is assumed to be %s endian\n", | |
d7449b42 | 395 | (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little")); |
b4a20239 AC |
396 | } |
397 | ||
398 | static void | |
399 | set_endian (char *ignore_args, int from_tty, struct cmd_list_element *c) | |
400 | { | |
3fd3d7d2 | 401 | if (set_endian_string == endian_auto) |
b4a20239 AC |
402 | { |
403 | target_byte_order_auto = 1; | |
404 | } | |
405 | else if (set_endian_string == endian_little) | |
406 | { | |
d90cf509 | 407 | struct gdbarch_info info; |
b4a20239 | 408 | target_byte_order_auto = 0; |
d90cf509 AC |
409 | gdbarch_info_init (&info); |
410 | info.byte_order = BFD_ENDIAN_LITTLE; | |
411 | if (! gdbarch_update_p (info)) | |
412 | printf_unfiltered ("Little endian target not supported by GDB\n"); | |
b4a20239 AC |
413 | } |
414 | else if (set_endian_string == endian_big) | |
415 | { | |
d90cf509 | 416 | struct gdbarch_info info; |
b4a20239 | 417 | target_byte_order_auto = 0; |
d90cf509 AC |
418 | gdbarch_info_init (&info); |
419 | info.byte_order = BFD_ENDIAN_BIG; | |
420 | if (! gdbarch_update_p (info)) | |
421 | printf_unfiltered ("Big endian target not supported by GDB\n"); | |
b4a20239 AC |
422 | } |
423 | else | |
8e65ff28 AC |
424 | internal_error (__FILE__, __LINE__, |
425 | "set_endian: bad value"); | |
b4a20239 AC |
426 | show_endian (NULL, from_tty); |
427 | } | |
428 | ||
b4a20239 AC |
429 | /* Functions to manipulate the architecture of the target */ |
430 | ||
431 | enum set_arch { set_arch_auto, set_arch_manual }; | |
432 | ||
a8cf2722 | 433 | static int target_architecture_auto = 1; |
b4a20239 | 434 | |
a8cf2722 AC |
435 | static const char *set_architecture_string; |
436 | ||
437 | const char * | |
438 | selected_architecture_name (void) | |
439 | { | |
440 | if (target_architecture_auto) | |
441 | return NULL; | |
442 | else | |
443 | return set_architecture_string; | |
444 | } | |
b4a20239 | 445 | |
b4a20239 AC |
446 | /* Called if the user enters ``show architecture'' without an |
447 | argument. */ | |
448 | ||
449 | static void | |
450 | show_architecture (char *args, int from_tty) | |
451 | { | |
452 | const char *arch; | |
453 | arch = TARGET_ARCHITECTURE->printable_name; | |
454 | if (target_architecture_auto) | |
455 | printf_filtered ("The target architecture is set automatically (currently %s)\n", arch); | |
456 | else | |
457 | printf_filtered ("The target architecture is assumed to be %s\n", arch); | |
458 | } | |
459 | ||
460 | ||
461 | /* Called if the user enters ``set architecture'' with or without an | |
462 | argument. */ | |
463 | ||
464 | static void | |
465 | set_architecture (char *ignore_args, int from_tty, struct cmd_list_element *c) | |
466 | { | |
467 | if (strcmp (set_architecture_string, "auto") == 0) | |
468 | { | |
469 | target_architecture_auto = 1; | |
470 | } | |
d90cf509 | 471 | else |
b4a20239 AC |
472 | { |
473 | struct gdbarch_info info; | |
fb6ecb0f | 474 | gdbarch_info_init (&info); |
b4a20239 AC |
475 | info.bfd_arch_info = bfd_scan_arch (set_architecture_string); |
476 | if (info.bfd_arch_info == NULL) | |
8e65ff28 AC |
477 | internal_error (__FILE__, __LINE__, |
478 | "set_architecture: bfd_scan_arch failed"); | |
16f33e29 | 479 | if (gdbarch_update_p (info)) |
b4a20239 AC |
480 | target_architecture_auto = 0; |
481 | else | |
ec3d358c | 482 | printf_unfiltered ("Architecture `%s' not recognized.\n", |
b4a20239 AC |
483 | set_architecture_string); |
484 | } | |
b4a20239 AC |
485 | show_architecture (NULL, from_tty); |
486 | } | |
487 | ||
ebdba546 AC |
488 | /* Try to select a global architecture that matches "info". Return |
489 | non-zero if the attempt succeds. */ | |
490 | int | |
491 | gdbarch_update_p (struct gdbarch_info info) | |
492 | { | |
493 | struct gdbarch *new_gdbarch = gdbarch_find_by_info (info); | |
494 | ||
495 | /* If there no architecture by that name, reject the request. */ | |
496 | if (new_gdbarch == NULL) | |
497 | { | |
498 | if (gdbarch_debug) | |
499 | fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: " | |
500 | "Architecture not found\n"); | |
501 | return 0; | |
502 | } | |
503 | ||
504 | /* If it is the same old architecture, accept the request (but don't | |
505 | swap anything). */ | |
506 | if (new_gdbarch == current_gdbarch) | |
507 | { | |
508 | if (gdbarch_debug) | |
509 | fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: " | |
510 | "Architecture 0x%08lx (%s) unchanged\n", | |
511 | (long) new_gdbarch, | |
512 | gdbarch_bfd_arch_info (new_gdbarch)->printable_name); | |
513 | return 1; | |
514 | } | |
515 | ||
516 | /* It's a new architecture, swap it in. */ | |
517 | if (gdbarch_debug) | |
518 | fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: " | |
519 | "New architecture 0x%08lx (%s) selected\n", | |
520 | (long) new_gdbarch, | |
521 | gdbarch_bfd_arch_info (new_gdbarch)->printable_name); | |
522 | deprecated_current_gdbarch_select_hack (new_gdbarch); | |
523 | ||
524 | return 1; | |
525 | } | |
526 | ||
2b026650 MK |
527 | /* Return the architecture for ABFD. If no suitable architecture |
528 | could be find, return NULL. */ | |
529 | ||
530 | struct gdbarch * | |
531 | gdbarch_from_bfd (bfd *abfd) | |
b4a20239 | 532 | { |
2b026650 MK |
533 | struct gdbarch *old_gdbarch = current_gdbarch; |
534 | struct gdbarch *new_gdbarch; | |
d90cf509 | 535 | struct gdbarch_info info; |
2b026650 | 536 | |
d90cf509 AC |
537 | gdbarch_info_init (&info); |
538 | info.abfd = abfd; | |
b60eb90d | 539 | return gdbarch_find_by_info (info); |
2b026650 MK |
540 | } |
541 | ||
542 | /* Set the dynamic target-system-dependent parameters (architecture, | |
543 | byte-order) using information found in the BFD */ | |
544 | ||
545 | void | |
546 | set_gdbarch_from_file (bfd *abfd) | |
547 | { | |
548 | struct gdbarch *gdbarch; | |
549 | ||
550 | gdbarch = gdbarch_from_bfd (abfd); | |
551 | if (gdbarch == NULL) | |
d90cf509 | 552 | error ("Architecture of file not recognized.\n"); |
b60eb90d | 553 | deprecated_current_gdbarch_select_hack (gdbarch); |
b4a20239 AC |
554 | } |
555 | ||
556 | /* Initialize the current architecture. Update the ``set | |
557 | architecture'' command so that it specifies a list of valid | |
558 | architectures. */ | |
559 | ||
1ba607ad AC |
560 | #ifdef DEFAULT_BFD_ARCH |
561 | extern const bfd_arch_info_type DEFAULT_BFD_ARCH; | |
562 | static const bfd_arch_info_type *default_bfd_arch = &DEFAULT_BFD_ARCH; | |
563 | #else | |
4b9b3959 | 564 | static const bfd_arch_info_type *default_bfd_arch; |
1ba607ad AC |
565 | #endif |
566 | ||
567 | #ifdef DEFAULT_BFD_VEC | |
568 | extern const bfd_target DEFAULT_BFD_VEC; | |
569 | static const bfd_target *default_bfd_vec = &DEFAULT_BFD_VEC; | |
570 | #else | |
571 | static const bfd_target *default_bfd_vec; | |
572 | #endif | |
573 | ||
b4a20239 AC |
574 | void |
575 | initialize_current_architecture (void) | |
576 | { | |
577 | const char **arches = gdbarch_printable_names (); | |
b4a20239 | 578 | |
1ba607ad AC |
579 | /* determine a default architecture and byte order. */ |
580 | struct gdbarch_info info; | |
fb6ecb0f | 581 | gdbarch_info_init (&info); |
1ba607ad AC |
582 | |
583 | /* Find a default architecture. */ | |
584 | if (info.bfd_arch_info == NULL | |
585 | && default_bfd_arch != NULL) | |
586 | info.bfd_arch_info = default_bfd_arch; | |
587 | if (info.bfd_arch_info == NULL) | |
b4a20239 | 588 | { |
1ba607ad AC |
589 | /* Choose the architecture by taking the first one |
590 | alphabetically. */ | |
591 | const char *chosen = arches[0]; | |
b4a20239 | 592 | const char **arch; |
b4a20239 AC |
593 | for (arch = arches; *arch != NULL; arch++) |
594 | { | |
b4a20239 AC |
595 | if (strcmp (*arch, chosen) < 0) |
596 | chosen = *arch; | |
597 | } | |
598 | if (chosen == NULL) | |
8e65ff28 AC |
599 | internal_error (__FILE__, __LINE__, |
600 | "initialize_current_architecture: No arch"); | |
b4a20239 AC |
601 | info.bfd_arch_info = bfd_scan_arch (chosen); |
602 | if (info.bfd_arch_info == NULL) | |
8e65ff28 AC |
603 | internal_error (__FILE__, __LINE__, |
604 | "initialize_current_architecture: Arch not found"); | |
1ba607ad AC |
605 | } |
606 | ||
afe64c1a | 607 | /* Take several guesses at a byte order. */ |
428721aa | 608 | if (info.byte_order == BFD_ENDIAN_UNKNOWN |
1ba607ad AC |
609 | && default_bfd_vec != NULL) |
610 | { | |
611 | /* Extract BFD's default vector's byte order. */ | |
612 | switch (default_bfd_vec->byteorder) | |
613 | { | |
614 | case BFD_ENDIAN_BIG: | |
d7449b42 | 615 | info.byte_order = BFD_ENDIAN_BIG; |
1ba607ad AC |
616 | break; |
617 | case BFD_ENDIAN_LITTLE: | |
778eb05e | 618 | info.byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad AC |
619 | break; |
620 | default: | |
621 | break; | |
622 | } | |
623 | } | |
428721aa | 624 | if (info.byte_order == BFD_ENDIAN_UNKNOWN) |
1ba607ad AC |
625 | { |
626 | /* look for ``*el-*'' in the target name. */ | |
627 | const char *chp; | |
628 | chp = strchr (target_name, '-'); | |
629 | if (chp != NULL | |
630 | && chp - 2 >= target_name | |
631 | && strncmp (chp - 2, "el", 2) == 0) | |
778eb05e | 632 | info.byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad | 633 | } |
428721aa | 634 | if (info.byte_order == BFD_ENDIAN_UNKNOWN) |
1ba607ad AC |
635 | { |
636 | /* Wire it to big-endian!!! */ | |
d7449b42 | 637 | info.byte_order = BFD_ENDIAN_BIG; |
1ba607ad AC |
638 | } |
639 | ||
d90cf509 AC |
640 | if (! gdbarch_update_p (info)) |
641 | internal_error (__FILE__, __LINE__, | |
642 | "initialize_current_architecture: Selection of initial architecture failed"); | |
b4a20239 | 643 | |
1ba607ad AC |
644 | /* Create the ``set architecture'' command appending ``auto'' to the |
645 | list of architectures. */ | |
b4a20239 AC |
646 | { |
647 | struct cmd_list_element *c; | |
648 | /* Append ``auto''. */ | |
649 | int nr; | |
650 | for (nr = 0; arches[nr] != NULL; nr++); | |
651 | arches = xrealloc (arches, sizeof (char*) * (nr + 2)); | |
652 | arches[nr + 0] = "auto"; | |
653 | arches[nr + 1] = NULL; | |
654 | /* FIXME: add_set_enum_cmd() uses an array of ``char *'' instead | |
655 | of ``const char *''. We just happen to know that the casts are | |
656 | safe. */ | |
657 | c = add_set_enum_cmd ("architecture", class_support, | |
53904c9e | 658 | arches, &set_architecture_string, |
b4a20239 AC |
659 | "Set architecture of target.", |
660 | &setlist); | |
9f60d481 | 661 | set_cmd_sfunc (c, set_architecture); |
b4a20239 AC |
662 | add_alias_cmd ("processor", "architecture", class_support, 1, &setlist); |
663 | /* Don't use set_from_show - need to print both auto/manual and | |
664 | current setting. */ | |
665 | add_cmd ("architecture", class_support, show_architecture, | |
666 | "Show the current target architecture", &showlist); | |
b4a20239 AC |
667 | } |
668 | } | |
669 | ||
670 | ||
fb6ecb0f AC |
671 | /* Initialize a gdbarch info to values that will be automatically |
672 | overridden. Note: Originally, this ``struct info'' was initialized | |
ce2826aa | 673 | using memset(0). Unfortunately, that ran into problems, namely |
fb6ecb0f AC |
674 | BFD_ENDIAN_BIG is zero. An explicit initialization function that |
675 | can explicitly set each field to a well defined value is used. */ | |
676 | ||
677 | void | |
678 | gdbarch_info_init (struct gdbarch_info *info) | |
679 | { | |
680 | memset (info, 0, sizeof (struct gdbarch_info)); | |
428721aa | 681 | info->byte_order = BFD_ENDIAN_UNKNOWN; |
4be87837 | 682 | info->osabi = GDB_OSABI_UNINITIALIZED; |
fb6ecb0f AC |
683 | } |
684 | ||
100bcc3f | 685 | /* Similar to init, but this time fill in the blanks. Information is |
bf922ad9 AC |
686 | obtained from the specified architecture, global "set ..." options, |
687 | and explicitly initialized INFO fields. */ | |
688 | ||
689 | void | |
690 | gdbarch_info_fill (struct gdbarch *gdbarch, struct gdbarch_info *info) | |
691 | { | |
692 | /* "(gdb) set architecture ...". */ | |
693 | if (info->bfd_arch_info == NULL | |
694 | && !target_architecture_auto | |
695 | && gdbarch != NULL) | |
696 | info->bfd_arch_info = gdbarch_bfd_arch_info (gdbarch); | |
697 | if (info->bfd_arch_info == NULL | |
698 | && info->abfd != NULL | |
699 | && bfd_get_arch (info->abfd) != bfd_arch_unknown | |
700 | && bfd_get_arch (info->abfd) != bfd_arch_obscure) | |
701 | info->bfd_arch_info = bfd_get_arch_info (info->abfd); | |
702 | if (info->bfd_arch_info == NULL | |
703 | && gdbarch != NULL) | |
704 | info->bfd_arch_info = gdbarch_bfd_arch_info (gdbarch); | |
705 | ||
706 | /* "(gdb) set byte-order ...". */ | |
707 | if (info->byte_order == BFD_ENDIAN_UNKNOWN | |
708 | && !target_byte_order_auto | |
709 | && gdbarch != NULL) | |
710 | info->byte_order = gdbarch_byte_order (gdbarch); | |
711 | /* From the INFO struct. */ | |
712 | if (info->byte_order == BFD_ENDIAN_UNKNOWN | |
713 | && info->abfd != NULL) | |
714 | info->byte_order = (bfd_big_endian (info->abfd) ? BFD_ENDIAN_BIG | |
715 | : bfd_little_endian (info->abfd) ? BFD_ENDIAN_LITTLE | |
716 | : BFD_ENDIAN_UNKNOWN); | |
717 | /* From the current target. */ | |
718 | if (info->byte_order == BFD_ENDIAN_UNKNOWN | |
719 | && gdbarch != NULL) | |
720 | info->byte_order = gdbarch_byte_order (gdbarch); | |
721 | ||
722 | /* "(gdb) set osabi ...". Handled by gdbarch_lookup_osabi. */ | |
723 | if (info->osabi == GDB_OSABI_UNINITIALIZED) | |
724 | info->osabi = gdbarch_lookup_osabi (info->abfd); | |
725 | if (info->osabi == GDB_OSABI_UNINITIALIZED | |
726 | && gdbarch != NULL) | |
727 | info->osabi = gdbarch_osabi (gdbarch); | |
728 | ||
729 | /* Must have at least filled in the architecture. */ | |
730 | gdb_assert (info->bfd_arch_info != NULL); | |
731 | } | |
732 | ||
c0e8c252 AC |
733 | /* */ |
734 | ||
a78f21af | 735 | extern initialize_file_ftype _initialize_gdbarch_utils; /* -Wmissing-prototypes */ |
c0e8c252 AC |
736 | |
737 | void | |
b4a20239 | 738 | _initialize_gdbarch_utils (void) |
c0e8c252 | 739 | { |
b4a20239 AC |
740 | struct cmd_list_element *c; |
741 | c = add_set_enum_cmd ("endian", class_support, | |
742 | endian_enum, &set_endian_string, | |
743 | "Set endianness of target.", | |
744 | &setlist); | |
9f60d481 | 745 | set_cmd_sfunc (c, set_endian); |
b4a20239 AC |
746 | /* Don't use set_from_show - need to print both auto/manual and |
747 | current setting. */ | |
748 | add_cmd ("endian", class_support, show_endian, | |
749 | "Show the current byte-order", &showlist); | |
c0e8c252 | 750 | } |