Commit | Line | Data |
---|---|---|
c0e8c252 | 1 | /* Dynamic architecture support for GDB, the GNU debugger. |
f4f9705a | 2 | |
424163ea | 3 | Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006 |
22a44745 | 4 | Free Software 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 | |
197e01b6 EZ |
20 | Foundation, Inc., 51 Franklin Street, Fifth Floor, |
21 | Boston, MA 02110-1301, USA. */ | |
c0e8c252 AC |
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 | 34 | #include "osabi.h" |
424163ea | 35 | #include "target-descriptions.h" |
bf922ad9 | 36 | |
1ba607ad AC |
37 | #include "version.h" |
38 | ||
f0d4cc9e AC |
39 | #include "floatformat.h" |
40 | ||
049ee0e4 AC |
41 | /* Implementation of extract return value that grubs around in the |
42 | register cache. */ | |
43 | void | |
44 | legacy_extract_return_value (struct type *type, struct regcache *regcache, | |
b60c417a | 45 | gdb_byte *valbuf) |
049ee0e4 | 46 | { |
22a44745 | 47 | gdb_byte *registers = deprecated_grub_regcache_for_registers (regcache); |
fc1a4b47 | 48 | gdb_byte *buf = valbuf; |
524d7c18 | 49 | DEPRECATED_EXTRACT_RETURN_VALUE (type, registers, buf); /* OK */ |
049ee0e4 AC |
50 | } |
51 | ||
ebba8386 AC |
52 | /* Implementation of store return value that grubs the register cache. |
53 | Takes a local copy of the buffer to avoid const problems. */ | |
54 | void | |
55 | legacy_store_return_value (struct type *type, struct regcache *regcache, | |
b60c417a | 56 | const gdb_byte *buf) |
ebba8386 | 57 | { |
fc1a4b47 | 58 | gdb_byte *b = alloca (TYPE_LENGTH (type)); |
ebba8386 AC |
59 | gdb_assert (regcache == current_regcache); |
60 | memcpy (b, buf, TYPE_LENGTH (type)); | |
61 | DEPRECATED_STORE_RETURN_VALUE (type, b); | |
62 | } | |
63 | ||
1fd35568 JB |
64 | int |
65 | always_use_struct_convention (int gcc_p, struct type *value_type) | |
66 | { | |
67 | return 1; | |
68 | } | |
69 | ||
750eb019 AC |
70 | enum return_value_convention |
71 | legacy_return_value (struct gdbarch *gdbarch, struct type *valtype, | |
b60c417a AC |
72 | struct regcache *regcache, gdb_byte *readbuf, |
73 | const gdb_byte *writebuf) | |
750eb019 AC |
74 | { |
75 | /* NOTE: cagney/2004-06-13: The gcc_p parameter to | |
76 | USE_STRUCT_CONVENTION isn't used. */ | |
77 | int struct_return = ((TYPE_CODE (valtype) == TYPE_CODE_STRUCT | |
78 | || TYPE_CODE (valtype) == TYPE_CODE_UNION | |
79 | || TYPE_CODE (valtype) == TYPE_CODE_ARRAY) | |
80 | && DEPRECATED_USE_STRUCT_CONVENTION (0, valtype)); | |
81 | ||
82 | if (writebuf != NULL) | |
83 | { | |
84 | gdb_assert (!struct_return); | |
85 | /* NOTE: cagney/2004-06-13: See stack.c:return_command. Old | |
86 | architectures don't expect STORE_RETURN_VALUE to handle small | |
87 | structures. Should not be called with such types. */ | |
88 | gdb_assert (TYPE_CODE (valtype) != TYPE_CODE_STRUCT | |
89 | && TYPE_CODE (valtype) != TYPE_CODE_UNION); | |
90 | STORE_RETURN_VALUE (valtype, regcache, writebuf); | |
91 | } | |
92 | ||
93 | if (readbuf != NULL) | |
94 | { | |
95 | gdb_assert (!struct_return); | |
96 | EXTRACT_RETURN_VALUE (valtype, regcache, readbuf); | |
97 | } | |
98 | ||
99 | if (struct_return) | |
100 | return RETURN_VALUE_STRUCT_CONVENTION; | |
101 | else | |
102 | return RETURN_VALUE_REGISTER_CONVENTION; | |
103 | } | |
1fd35568 | 104 | |
4182591f AC |
105 | int |
106 | legacy_register_sim_regno (int regnum) | |
107 | { | |
108 | /* Only makes sense to supply raw registers. */ | |
109 | gdb_assert (regnum >= 0 && regnum < NUM_REGS); | |
110 | /* NOTE: cagney/2002-05-13: The old code did it this way and it is | |
111 | suspected that some GDB/SIM combinations may rely on this | |
112 | behavour. The default should be one2one_register_sim_regno | |
113 | (below). */ | |
114 | if (REGISTER_NAME (regnum) != NULL | |
115 | && REGISTER_NAME (regnum)[0] != '\0') | |
116 | return regnum; | |
117 | else | |
118 | return LEGACY_SIM_REGNO_IGNORE; | |
119 | } | |
120 | ||
bdcd319a CV |
121 | CORE_ADDR |
122 | generic_skip_trampoline_code (CORE_ADDR pc) | |
123 | { | |
124 | return 0; | |
125 | } | |
126 | ||
dea0c52f | 127 | CORE_ADDR |
4c8c40e6 | 128 | generic_skip_solib_resolver (struct gdbarch *gdbarch, CORE_ADDR pc) |
dea0c52f MK |
129 | { |
130 | return 0; | |
131 | } | |
132 | ||
d50355b6 MS |
133 | int |
134 | generic_in_solib_return_trampoline (CORE_ADDR pc, char *name) | |
135 | { | |
136 | return 0; | |
137 | } | |
138 | ||
c12260ac CV |
139 | int |
140 | generic_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc) | |
141 | { | |
142 | return 0; | |
143 | } | |
144 | ||
c0e8c252 | 145 | void |
f6684c31 AC |
146 | generic_remote_translate_xfer_address (struct gdbarch *gdbarch, |
147 | struct regcache *regcache, | |
148 | CORE_ADDR gdb_addr, int gdb_len, | |
c0e8c252 AC |
149 | CORE_ADDR * rem_addr, int *rem_len) |
150 | { | |
151 | *rem_addr = gdb_addr; | |
152 | *rem_len = gdb_len; | |
153 | } | |
154 | ||
3339cf8b AC |
155 | /* Helper functions for INNER_THAN */ |
156 | ||
157 | int | |
fba45db2 | 158 | core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs) |
3339cf8b AC |
159 | { |
160 | return (lhs < rhs); | |
161 | } | |
162 | ||
163 | int | |
fba45db2 | 164 | core_addr_greaterthan (CORE_ADDR lhs, CORE_ADDR rhs) |
3339cf8b AC |
165 | { |
166 | return (lhs > rhs); | |
167 | } | |
168 | ||
169 | ||
f0d4cc9e AC |
170 | /* Helper functions for TARGET_{FLOAT,DOUBLE}_FORMAT */ |
171 | ||
172 | const struct floatformat * | |
173 | default_float_format (struct gdbarch *gdbarch) | |
174 | { | |
f0d4cc9e | 175 | int byte_order = gdbarch_byte_order (gdbarch); |
f0d4cc9e AC |
176 | switch (byte_order) |
177 | { | |
d7449b42 | 178 | case BFD_ENDIAN_BIG: |
f0d4cc9e | 179 | return &floatformat_ieee_single_big; |
778eb05e | 180 | case BFD_ENDIAN_LITTLE: |
f0d4cc9e AC |
181 | return &floatformat_ieee_single_little; |
182 | default: | |
8e65ff28 | 183 | internal_error (__FILE__, __LINE__, |
edefbb7c | 184 | _("default_float_format: bad byte order")); |
f0d4cc9e AC |
185 | } |
186 | } | |
187 | ||
188 | ||
189 | const struct floatformat * | |
190 | default_double_format (struct gdbarch *gdbarch) | |
191 | { | |
f0d4cc9e | 192 | int byte_order = gdbarch_byte_order (gdbarch); |
f0d4cc9e AC |
193 | switch (byte_order) |
194 | { | |
d7449b42 | 195 | case BFD_ENDIAN_BIG: |
f0d4cc9e | 196 | return &floatformat_ieee_double_big; |
778eb05e | 197 | case BFD_ENDIAN_LITTLE: |
f0d4cc9e AC |
198 | return &floatformat_ieee_double_little; |
199 | default: | |
8e65ff28 | 200 | internal_error (__FILE__, __LINE__, |
edefbb7c | 201 | _("default_double_format: bad byte order")); |
f0d4cc9e AC |
202 | } |
203 | } | |
204 | ||
193e3b1a AC |
205 | /* Misc helper functions for targets. */ |
206 | ||
f517ea4e | 207 | CORE_ADDR |
875e1767 | 208 | core_addr_identity (CORE_ADDR addr) |
f517ea4e PS |
209 | { |
210 | return addr; | |
211 | } | |
212 | ||
e2d0e7eb AC |
213 | CORE_ADDR |
214 | convert_from_func_ptr_addr_identity (struct gdbarch *gdbarch, CORE_ADDR addr, | |
215 | struct target_ops *targ) | |
216 | { | |
217 | return addr; | |
218 | } | |
219 | ||
88c72b7d AC |
220 | int |
221 | no_op_reg_to_regnum (int reg) | |
222 | { | |
223 | return reg; | |
224 | } | |
225 | ||
a2cf933a EZ |
226 | void |
227 | default_elf_make_msymbol_special (asymbol *sym, struct minimal_symbol *msym) | |
228 | { | |
229 | return; | |
230 | } | |
231 | ||
232 | void | |
233 | default_coff_make_msymbol_special (int val, struct minimal_symbol *msym) | |
234 | { | |
235 | return; | |
236 | } | |
237 | ||
01fb7433 AC |
238 | int |
239 | cannot_register_not (int regnum) | |
240 | { | |
241 | return 0; | |
242 | } | |
39d4ef09 AC |
243 | |
244 | /* Legacy version of target_virtual_frame_pointer(). Assumes that | |
0ba6dca9 AC |
245 | there is an DEPRECATED_FP_REGNUM and that it is the same, cooked or |
246 | raw. */ | |
39d4ef09 AC |
247 | |
248 | void | |
249 | legacy_virtual_frame_pointer (CORE_ADDR pc, | |
250 | int *frame_regnum, | |
251 | LONGEST *frame_offset) | |
252 | { | |
20bcf01c AC |
253 | /* FIXME: cagney/2002-09-13: This code is used when identifying the |
254 | frame pointer of the current PC. It is assuming that a single | |
255 | register and an offset can determine this. I think it should | |
256 | instead generate a byte code expression as that would work better | |
257 | with things like Dwarf2's CFI. */ | |
0ba6dca9 AC |
258 | if (DEPRECATED_FP_REGNUM >= 0 && DEPRECATED_FP_REGNUM < NUM_REGS) |
259 | *frame_regnum = DEPRECATED_FP_REGNUM; | |
20bcf01c AC |
260 | else if (SP_REGNUM >= 0 && SP_REGNUM < NUM_REGS) |
261 | *frame_regnum = SP_REGNUM; | |
262 | else | |
263 | /* Should this be an internal error? I guess so, it is reflecting | |
264 | an architectural limitation in the current design. */ | |
edefbb7c | 265 | internal_error (__FILE__, __LINE__, _("No virtual frame pointer available")); |
39d4ef09 AC |
266 | *frame_offset = 0; |
267 | } | |
46cd78fb | 268 | |
b2e75d78 AC |
269 | /* Assume the world is sane, every register's virtual and real size |
270 | is identical. */ | |
46cd78fb AC |
271 | |
272 | int | |
b2e75d78 | 273 | generic_register_size (int regnum) |
46cd78fb AC |
274 | { |
275 | gdb_assert (regnum >= 0 && regnum < NUM_REGS + NUM_PSEUDO_REGS); | |
01e1877c | 276 | return TYPE_LENGTH (gdbarch_register_type (current_gdbarch, regnum)); |
ce29138a MS |
277 | } |
278 | ||
a7e3c2ad AC |
279 | /* Assume all registers are adjacent. */ |
280 | ||
281 | int | |
282 | generic_register_byte (int regnum) | |
283 | { | |
284 | int byte; | |
285 | int i; | |
286 | gdb_assert (regnum >= 0 && regnum < NUM_REGS + NUM_PSEUDO_REGS); | |
287 | byte = 0; | |
288 | for (i = 0; i < regnum; i++) | |
289 | { | |
0aa7e1aa | 290 | byte += generic_register_size (i); |
a7e3c2ad AC |
291 | } |
292 | return byte; | |
293 | } | |
294 | ||
d7bd68ca AC |
295 | \f |
296 | int | |
297 | legacy_pc_in_sigtramp (CORE_ADDR pc, char *name) | |
298 | { | |
8c6b0e06 | 299 | #if defined (DEPRECATED_IN_SIGTRAMP) |
dbfe4626 | 300 | return DEPRECATED_IN_SIGTRAMP (pc, name); |
8c6b0e06 AC |
301 | #else |
302 | return name && strcmp ("_sigtramp", name) == 0; | |
db54fef4 | 303 | #endif |
d7bd68ca AC |
304 | } |
305 | ||
13d01224 | 306 | int |
a1f4a1b6 | 307 | generic_convert_register_p (int regnum, struct type *type) |
13d01224 | 308 | { |
9730f241 | 309 | return 0; |
13d01224 AC |
310 | } |
311 | ||
192cb3d4 MK |
312 | int |
313 | default_stabs_argument_has_addr (struct gdbarch *gdbarch, struct type *type) | |
314 | { | |
315 | if (DEPRECATED_REG_STRUCT_HAS_ADDR_P () | |
316 | && DEPRECATED_REG_STRUCT_HAS_ADDR (processing_gcc_compilation, type)) | |
317 | { | |
318 | CHECK_TYPEDEF (type); | |
319 | ||
320 | return (TYPE_CODE (type) == TYPE_CODE_STRUCT | |
321 | || TYPE_CODE (type) == TYPE_CODE_UNION | |
322 | || TYPE_CODE (type) == TYPE_CODE_SET | |
323 | || TYPE_CODE (type) == TYPE_CODE_BITSTRING); | |
324 | } | |
325 | ||
326 | return 0; | |
327 | } | |
328 | ||
3ca64954 RC |
329 | int |
330 | generic_instruction_nullified (struct gdbarch *gdbarch, | |
331 | struct regcache *regcache) | |
332 | { | |
333 | return 0; | |
334 | } | |
335 | ||
01fb7433 | 336 | \f |
b4a20239 AC |
337 | /* Functions to manipulate the endianness of the target. */ |
338 | ||
7a107747 | 339 | static int target_byte_order_user = BFD_ENDIAN_UNKNOWN; |
b4a20239 | 340 | |
53904c9e AC |
341 | static const char endian_big[] = "big"; |
342 | static const char endian_little[] = "little"; | |
343 | static const char endian_auto[] = "auto"; | |
344 | static const char *endian_enum[] = | |
b4a20239 AC |
345 | { |
346 | endian_big, | |
347 | endian_little, | |
348 | endian_auto, | |
349 | NULL, | |
350 | }; | |
53904c9e | 351 | static const char *set_endian_string; |
b4a20239 AC |
352 | |
353 | /* Called by ``show endian''. */ | |
354 | ||
355 | static void | |
7ab04401 AC |
356 | show_endian (struct ui_file *file, int from_tty, struct cmd_list_element *c, |
357 | const char *value) | |
b4a20239 | 358 | { |
7a107747 | 359 | if (target_byte_order_user != BFD_ENDIAN_UNKNOWN) |
edefbb7c | 360 | if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) |
7ab04401 AC |
361 | fprintf_unfiltered (file, _("The target endianness is set automatically " |
362 | "(currently big endian)\n")); | |
edefbb7c | 363 | else |
7ab04401 | 364 | fprintf_unfiltered (file, _("The target endianness is set automatically " |
edefbb7c | 365 | "(currently little endian)\n")); |
b4a20239 | 366 | else |
edefbb7c | 367 | if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) |
7ab04401 AC |
368 | fprintf_unfiltered (file, |
369 | _("The target is assumed to be big endian\n")); | |
370 | else | |
371 | fprintf_unfiltered (file, | |
372 | _("The target is assumed to be little endian\n")); | |
b4a20239 AC |
373 | } |
374 | ||
375 | static void | |
376 | set_endian (char *ignore_args, int from_tty, struct cmd_list_element *c) | |
377 | { | |
7a107747 DJ |
378 | struct gdbarch_info info; |
379 | ||
380 | gdbarch_info_init (&info); | |
381 | ||
3fd3d7d2 | 382 | if (set_endian_string == endian_auto) |
b4a20239 | 383 | { |
7a107747 DJ |
384 | target_byte_order_user = BFD_ENDIAN_UNKNOWN; |
385 | if (! gdbarch_update_p (info)) | |
386 | internal_error (__FILE__, __LINE__, | |
387 | _("set_endian: architecture update failed")); | |
b4a20239 AC |
388 | } |
389 | else if (set_endian_string == endian_little) | |
390 | { | |
d90cf509 AC |
391 | info.byte_order = BFD_ENDIAN_LITTLE; |
392 | if (! gdbarch_update_p (info)) | |
edefbb7c | 393 | printf_unfiltered (_("Little endian target not supported by GDB\n")); |
7a107747 DJ |
394 | else |
395 | target_byte_order_user = BFD_ENDIAN_LITTLE; | |
b4a20239 AC |
396 | } |
397 | else if (set_endian_string == endian_big) | |
398 | { | |
d90cf509 AC |
399 | info.byte_order = BFD_ENDIAN_BIG; |
400 | if (! gdbarch_update_p (info)) | |
edefbb7c | 401 | printf_unfiltered (_("Big endian target not supported by GDB\n")); |
7a107747 DJ |
402 | else |
403 | target_byte_order_user = BFD_ENDIAN_BIG; | |
b4a20239 AC |
404 | } |
405 | else | |
8e65ff28 | 406 | internal_error (__FILE__, __LINE__, |
edefbb7c | 407 | _("set_endian: bad value")); |
7a107747 | 408 | |
7ab04401 | 409 | show_endian (gdb_stdout, from_tty, NULL, NULL); |
b4a20239 AC |
410 | } |
411 | ||
b4a20239 AC |
412 | /* Functions to manipulate the architecture of the target */ |
413 | ||
414 | enum set_arch { set_arch_auto, set_arch_manual }; | |
415 | ||
7a107747 | 416 | static const struct bfd_arch_info *target_architecture_user; |
b4a20239 | 417 | |
a8cf2722 AC |
418 | static const char *set_architecture_string; |
419 | ||
420 | const char * | |
421 | selected_architecture_name (void) | |
422 | { | |
7a107747 | 423 | if (target_architecture_user == NULL) |
a8cf2722 AC |
424 | return NULL; |
425 | else | |
426 | return set_architecture_string; | |
427 | } | |
b4a20239 | 428 | |
b4a20239 AC |
429 | /* Called if the user enters ``show architecture'' without an |
430 | argument. */ | |
431 | ||
432 | static void | |
7ab04401 AC |
433 | show_architecture (struct ui_file *file, int from_tty, |
434 | struct cmd_list_element *c, const char *value) | |
b4a20239 AC |
435 | { |
436 | const char *arch; | |
437 | arch = TARGET_ARCHITECTURE->printable_name; | |
7a107747 | 438 | if (target_architecture_user == NULL) |
7ab04401 AC |
439 | fprintf_filtered (file, _("\ |
440 | The target architecture is set automatically (currently %s)\n"), arch); | |
b4a20239 | 441 | else |
7ab04401 AC |
442 | fprintf_filtered (file, _("\ |
443 | The target architecture is assumed to be %s\n"), arch); | |
b4a20239 AC |
444 | } |
445 | ||
446 | ||
447 | /* Called if the user enters ``set architecture'' with or without an | |
448 | argument. */ | |
449 | ||
450 | static void | |
451 | set_architecture (char *ignore_args, int from_tty, struct cmd_list_element *c) | |
452 | { | |
7a107747 DJ |
453 | struct gdbarch_info info; |
454 | ||
455 | gdbarch_info_init (&info); | |
456 | ||
b4a20239 AC |
457 | if (strcmp (set_architecture_string, "auto") == 0) |
458 | { | |
7a107747 DJ |
459 | target_architecture_user = NULL; |
460 | if (!gdbarch_update_p (info)) | |
461 | internal_error (__FILE__, __LINE__, | |
462 | _("could not select an architecture automatically")); | |
b4a20239 | 463 | } |
d90cf509 | 464 | else |
b4a20239 | 465 | { |
b4a20239 AC |
466 | info.bfd_arch_info = bfd_scan_arch (set_architecture_string); |
467 | if (info.bfd_arch_info == NULL) | |
8e65ff28 | 468 | internal_error (__FILE__, __LINE__, |
edefbb7c | 469 | _("set_architecture: bfd_scan_arch failed")); |
16f33e29 | 470 | if (gdbarch_update_p (info)) |
7a107747 | 471 | target_architecture_user = info.bfd_arch_info; |
b4a20239 | 472 | else |
edefbb7c | 473 | printf_unfiltered (_("Architecture `%s' not recognized.\n"), |
b4a20239 AC |
474 | set_architecture_string); |
475 | } | |
7ab04401 | 476 | show_architecture (gdb_stdout, from_tty, NULL, NULL); |
b4a20239 AC |
477 | } |
478 | ||
ebdba546 AC |
479 | /* Try to select a global architecture that matches "info". Return |
480 | non-zero if the attempt succeds. */ | |
481 | int | |
482 | gdbarch_update_p (struct gdbarch_info info) | |
483 | { | |
484 | struct gdbarch *new_gdbarch = gdbarch_find_by_info (info); | |
485 | ||
486 | /* If there no architecture by that name, reject the request. */ | |
487 | if (new_gdbarch == NULL) | |
488 | { | |
489 | if (gdbarch_debug) | |
490 | fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: " | |
491 | "Architecture not found\n"); | |
492 | return 0; | |
493 | } | |
494 | ||
495 | /* If it is the same old architecture, accept the request (but don't | |
496 | swap anything). */ | |
497 | if (new_gdbarch == current_gdbarch) | |
498 | { | |
499 | if (gdbarch_debug) | |
500 | fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: " | |
501 | "Architecture 0x%08lx (%s) unchanged\n", | |
502 | (long) new_gdbarch, | |
503 | gdbarch_bfd_arch_info (new_gdbarch)->printable_name); | |
504 | return 1; | |
505 | } | |
506 | ||
507 | /* It's a new architecture, swap it in. */ | |
508 | if (gdbarch_debug) | |
509 | fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: " | |
510 | "New architecture 0x%08lx (%s) selected\n", | |
511 | (long) new_gdbarch, | |
512 | gdbarch_bfd_arch_info (new_gdbarch)->printable_name); | |
513 | deprecated_current_gdbarch_select_hack (new_gdbarch); | |
514 | ||
515 | return 1; | |
516 | } | |
517 | ||
2b026650 MK |
518 | /* Return the architecture for ABFD. If no suitable architecture |
519 | could be find, return NULL. */ | |
520 | ||
521 | struct gdbarch * | |
522 | gdbarch_from_bfd (bfd *abfd) | |
b4a20239 | 523 | { |
2b026650 MK |
524 | struct gdbarch *old_gdbarch = current_gdbarch; |
525 | struct gdbarch *new_gdbarch; | |
d90cf509 | 526 | struct gdbarch_info info; |
2b026650 | 527 | |
7a107747 DJ |
528 | /* If we call gdbarch_find_by_info without filling in info.abfd, |
529 | then it will use the global exec_bfd. That's fine if we don't | |
530 | have one of those either. And that's the only time we should | |
531 | reach here with a NULL ABFD argument - when we are discarding | |
532 | the executable. */ | |
533 | gdb_assert (abfd != NULL || exec_bfd == NULL); | |
534 | ||
d90cf509 AC |
535 | gdbarch_info_init (&info); |
536 | info.abfd = abfd; | |
b60eb90d | 537 | return gdbarch_find_by_info (info); |
2b026650 MK |
538 | } |
539 | ||
540 | /* Set the dynamic target-system-dependent parameters (architecture, | |
541 | byte-order) using information found in the BFD */ | |
542 | ||
543 | void | |
544 | set_gdbarch_from_file (bfd *abfd) | |
545 | { | |
546 | struct gdbarch *gdbarch; | |
547 | ||
548 | gdbarch = gdbarch_from_bfd (abfd); | |
549 | if (gdbarch == NULL) | |
8a3fe4f8 | 550 | error (_("Architecture of file not recognized.")); |
b60eb90d | 551 | deprecated_current_gdbarch_select_hack (gdbarch); |
b4a20239 AC |
552 | } |
553 | ||
554 | /* Initialize the current architecture. Update the ``set | |
555 | architecture'' command so that it specifies a list of valid | |
556 | architectures. */ | |
557 | ||
1ba607ad AC |
558 | #ifdef DEFAULT_BFD_ARCH |
559 | extern const bfd_arch_info_type DEFAULT_BFD_ARCH; | |
560 | static const bfd_arch_info_type *default_bfd_arch = &DEFAULT_BFD_ARCH; | |
561 | #else | |
4b9b3959 | 562 | static const bfd_arch_info_type *default_bfd_arch; |
1ba607ad AC |
563 | #endif |
564 | ||
565 | #ifdef DEFAULT_BFD_VEC | |
566 | extern const bfd_target DEFAULT_BFD_VEC; | |
567 | static const bfd_target *default_bfd_vec = &DEFAULT_BFD_VEC; | |
568 | #else | |
569 | static const bfd_target *default_bfd_vec; | |
570 | #endif | |
571 | ||
7a107747 DJ |
572 | static int default_byte_order = BFD_ENDIAN_UNKNOWN; |
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. */ | |
7a107747 | 584 | if (default_bfd_arch == NULL) |
b4a20239 | 585 | { |
1ba607ad AC |
586 | /* Choose the architecture by taking the first one |
587 | alphabetically. */ | |
588 | const char *chosen = arches[0]; | |
b4a20239 | 589 | const char **arch; |
b4a20239 AC |
590 | for (arch = arches; *arch != NULL; arch++) |
591 | { | |
b4a20239 AC |
592 | if (strcmp (*arch, chosen) < 0) |
593 | chosen = *arch; | |
594 | } | |
595 | if (chosen == NULL) | |
8e65ff28 | 596 | internal_error (__FILE__, __LINE__, |
edefbb7c | 597 | _("initialize_current_architecture: No arch")); |
7a107747 DJ |
598 | default_bfd_arch = bfd_scan_arch (chosen); |
599 | if (default_bfd_arch == NULL) | |
8e65ff28 | 600 | internal_error (__FILE__, __LINE__, |
edefbb7c | 601 | _("initialize_current_architecture: Arch not found")); |
1ba607ad AC |
602 | } |
603 | ||
7a107747 DJ |
604 | info.bfd_arch_info = default_bfd_arch; |
605 | ||
afe64c1a | 606 | /* Take several guesses at a byte order. */ |
7a107747 | 607 | if (default_byte_order == BFD_ENDIAN_UNKNOWN |
1ba607ad AC |
608 | && default_bfd_vec != NULL) |
609 | { | |
610 | /* Extract BFD's default vector's byte order. */ | |
611 | switch (default_bfd_vec->byteorder) | |
612 | { | |
613 | case BFD_ENDIAN_BIG: | |
7a107747 | 614 | default_byte_order = BFD_ENDIAN_BIG; |
1ba607ad AC |
615 | break; |
616 | case BFD_ENDIAN_LITTLE: | |
7a107747 | 617 | default_byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad AC |
618 | break; |
619 | default: | |
620 | break; | |
621 | } | |
622 | } | |
7a107747 | 623 | if (default_byte_order == BFD_ENDIAN_UNKNOWN) |
1ba607ad AC |
624 | { |
625 | /* look for ``*el-*'' in the target name. */ | |
626 | const char *chp; | |
627 | chp = strchr (target_name, '-'); | |
628 | if (chp != NULL | |
629 | && chp - 2 >= target_name | |
630 | && strncmp (chp - 2, "el", 2) == 0) | |
7a107747 | 631 | default_byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad | 632 | } |
7a107747 | 633 | if (default_byte_order == BFD_ENDIAN_UNKNOWN) |
1ba607ad AC |
634 | { |
635 | /* Wire it to big-endian!!! */ | |
7a107747 | 636 | default_byte_order = BFD_ENDIAN_BIG; |
1ba607ad AC |
637 | } |
638 | ||
7a107747 DJ |
639 | info.byte_order = default_byte_order; |
640 | ||
d90cf509 AC |
641 | if (! gdbarch_update_p (info)) |
642 | internal_error (__FILE__, __LINE__, | |
edefbb7c AC |
643 | _("initialize_current_architecture: Selection of " |
644 | "initial architecture failed")); | |
b4a20239 | 645 | |
1ba607ad AC |
646 | /* Create the ``set architecture'' command appending ``auto'' to the |
647 | list of architectures. */ | |
b4a20239 AC |
648 | { |
649 | struct cmd_list_element *c; | |
650 | /* Append ``auto''. */ | |
651 | int nr; | |
652 | for (nr = 0; arches[nr] != NULL; nr++); | |
653 | arches = xrealloc (arches, sizeof (char*) * (nr + 2)); | |
654 | arches[nr + 0] = "auto"; | |
655 | arches[nr + 1] = NULL; | |
7ab04401 AC |
656 | add_setshow_enum_cmd ("architecture", class_support, |
657 | arches, &set_architecture_string, _("\ | |
658 | Set architecture of target."), _("\ | |
659 | Show architecture of target."), NULL, | |
660 | set_architecture, show_architecture, | |
661 | &setlist, &showlist); | |
b4a20239 | 662 | add_alias_cmd ("processor", "architecture", class_support, 1, &setlist); |
b4a20239 AC |
663 | } |
664 | } | |
665 | ||
666 | ||
fb6ecb0f AC |
667 | /* Initialize a gdbarch info to values that will be automatically |
668 | overridden. Note: Originally, this ``struct info'' was initialized | |
ce2826aa | 669 | using memset(0). Unfortunately, that ran into problems, namely |
fb6ecb0f AC |
670 | BFD_ENDIAN_BIG is zero. An explicit initialization function that |
671 | can explicitly set each field to a well defined value is used. */ | |
672 | ||
673 | void | |
674 | gdbarch_info_init (struct gdbarch_info *info) | |
675 | { | |
676 | memset (info, 0, sizeof (struct gdbarch_info)); | |
428721aa | 677 | info->byte_order = BFD_ENDIAN_UNKNOWN; |
4be87837 | 678 | info->osabi = GDB_OSABI_UNINITIALIZED; |
fb6ecb0f AC |
679 | } |
680 | ||
100bcc3f | 681 | /* Similar to init, but this time fill in the blanks. Information is |
7a107747 DJ |
682 | obtained from the global "set ..." options and explicitly |
683 | initialized INFO fields. */ | |
bf922ad9 AC |
684 | |
685 | void | |
7a107747 | 686 | gdbarch_info_fill (struct gdbarch_info *info) |
bf922ad9 | 687 | { |
7a107747 DJ |
688 | /* Check for the current file. */ |
689 | if (info->abfd == NULL) | |
690 | info->abfd = exec_bfd; | |
691 | ||
424163ea DJ |
692 | /* Check for the current target description. */ |
693 | if (info->target_desc == NULL) | |
694 | info->target_desc = target_current_description (); | |
695 | ||
bf922ad9 AC |
696 | /* "(gdb) set architecture ...". */ |
697 | if (info->bfd_arch_info == NULL | |
7a107747 DJ |
698 | && target_architecture_user) |
699 | info->bfd_arch_info = target_architecture_user; | |
424163ea | 700 | /* From the file. */ |
bf922ad9 AC |
701 | if (info->bfd_arch_info == NULL |
702 | && info->abfd != NULL | |
703 | && bfd_get_arch (info->abfd) != bfd_arch_unknown | |
704 | && bfd_get_arch (info->abfd) != bfd_arch_obscure) | |
705 | info->bfd_arch_info = bfd_get_arch_info (info->abfd); | |
7a107747 DJ |
706 | /* From the default. */ |
707 | if (info->bfd_arch_info == NULL) | |
708 | info->bfd_arch_info = default_bfd_arch; | |
bf922ad9 AC |
709 | |
710 | /* "(gdb) set byte-order ...". */ | |
711 | if (info->byte_order == BFD_ENDIAN_UNKNOWN | |
7a107747 DJ |
712 | && target_byte_order_user != BFD_ENDIAN_UNKNOWN) |
713 | info->byte_order = target_byte_order_user; | |
bf922ad9 AC |
714 | /* From the INFO struct. */ |
715 | if (info->byte_order == BFD_ENDIAN_UNKNOWN | |
716 | && info->abfd != NULL) | |
717 | info->byte_order = (bfd_big_endian (info->abfd) ? BFD_ENDIAN_BIG | |
7a107747 DJ |
718 | : bfd_little_endian (info->abfd) ? BFD_ENDIAN_LITTLE |
719 | : BFD_ENDIAN_UNKNOWN); | |
720 | /* From the default. */ | |
721 | if (info->byte_order == BFD_ENDIAN_UNKNOWN) | |
722 | info->byte_order = default_byte_order; | |
bf922ad9 AC |
723 | |
724 | /* "(gdb) set osabi ...". Handled by gdbarch_lookup_osabi. */ | |
725 | if (info->osabi == GDB_OSABI_UNINITIALIZED) | |
726 | info->osabi = gdbarch_lookup_osabi (info->abfd); | |
bf922ad9 AC |
727 | |
728 | /* Must have at least filled in the architecture. */ | |
729 | gdb_assert (info->bfd_arch_info != NULL); | |
730 | } | |
731 | ||
c0e8c252 AC |
732 | /* */ |
733 | ||
a78f21af | 734 | extern initialize_file_ftype _initialize_gdbarch_utils; /* -Wmissing-prototypes */ |
c0e8c252 AC |
735 | |
736 | void | |
b4a20239 | 737 | _initialize_gdbarch_utils (void) |
c0e8c252 | 738 | { |
b4a20239 | 739 | struct cmd_list_element *c; |
7ab04401 AC |
740 | add_setshow_enum_cmd ("endian", class_support, |
741 | endian_enum, &set_endian_string, _("\ | |
742 | Set endianness of target."), _("\ | |
743 | Show endianness of target."), NULL, | |
744 | set_endian, show_endian, | |
745 | &setlist, &showlist); | |
c0e8c252 | 746 | } |