Commit | Line | Data |
---|---|---|
c0e8c252 | 1 | /* Dynamic architecture support for GDB, the GNU debugger. |
f4f9705a | 2 | |
197e01b6 | 3 | Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005 |
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 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, | |
b60c417a | 44 | gdb_byte *valbuf) |
049ee0e4 | 45 | { |
22a44745 | 46 | gdb_byte *registers = deprecated_grub_regcache_for_registers (regcache); |
fc1a4b47 | 47 | gdb_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, | |
b60c417a | 55 | const gdb_byte *buf) |
ebba8386 | 56 | { |
fc1a4b47 | 57 | gdb_byte *b = alloca (TYPE_LENGTH (type)); |
ebba8386 AC |
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, | |
b60c417a AC |
71 | struct regcache *regcache, gdb_byte *readbuf, |
72 | const gdb_byte *writebuf) | |
750eb019 AC |
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 | ||
d50355b6 MS |
132 | int |
133 | generic_in_solib_return_trampoline (CORE_ADDR pc, char *name) | |
134 | { | |
135 | return 0; | |
136 | } | |
137 | ||
c12260ac CV |
138 | int |
139 | generic_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc) | |
140 | { | |
141 | return 0; | |
142 | } | |
143 | ||
c0e8c252 | 144 | void |
f6684c31 AC |
145 | generic_remote_translate_xfer_address (struct gdbarch *gdbarch, |
146 | struct regcache *regcache, | |
147 | CORE_ADDR gdb_addr, int gdb_len, | |
c0e8c252 AC |
148 | CORE_ADDR * rem_addr, int *rem_len) |
149 | { | |
150 | *rem_addr = gdb_addr; | |
151 | *rem_len = gdb_len; | |
152 | } | |
153 | ||
3339cf8b AC |
154 | /* Helper functions for INNER_THAN */ |
155 | ||
156 | int | |
fba45db2 | 157 | core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs) |
3339cf8b AC |
158 | { |
159 | return (lhs < rhs); | |
160 | } | |
161 | ||
162 | int | |
fba45db2 | 163 | core_addr_greaterthan (CORE_ADDR lhs, CORE_ADDR rhs) |
3339cf8b AC |
164 | { |
165 | return (lhs > rhs); | |
166 | } | |
167 | ||
168 | ||
f0d4cc9e AC |
169 | /* Helper functions for TARGET_{FLOAT,DOUBLE}_FORMAT */ |
170 | ||
171 | const struct floatformat * | |
172 | default_float_format (struct gdbarch *gdbarch) | |
173 | { | |
f0d4cc9e | 174 | int byte_order = gdbarch_byte_order (gdbarch); |
f0d4cc9e AC |
175 | switch (byte_order) |
176 | { | |
d7449b42 | 177 | case BFD_ENDIAN_BIG: |
f0d4cc9e | 178 | return &floatformat_ieee_single_big; |
778eb05e | 179 | case BFD_ENDIAN_LITTLE: |
f0d4cc9e AC |
180 | return &floatformat_ieee_single_little; |
181 | default: | |
8e65ff28 | 182 | internal_error (__FILE__, __LINE__, |
edefbb7c | 183 | _("default_float_format: bad byte order")); |
f0d4cc9e AC |
184 | } |
185 | } | |
186 | ||
187 | ||
188 | const struct floatformat * | |
189 | default_double_format (struct gdbarch *gdbarch) | |
190 | { | |
f0d4cc9e | 191 | int byte_order = gdbarch_byte_order (gdbarch); |
f0d4cc9e AC |
192 | switch (byte_order) |
193 | { | |
d7449b42 | 194 | case BFD_ENDIAN_BIG: |
f0d4cc9e | 195 | return &floatformat_ieee_double_big; |
778eb05e | 196 | case BFD_ENDIAN_LITTLE: |
f0d4cc9e AC |
197 | return &floatformat_ieee_double_little; |
198 | default: | |
8e65ff28 | 199 | internal_error (__FILE__, __LINE__, |
edefbb7c | 200 | _("default_double_format: bad byte order")); |
f0d4cc9e AC |
201 | } |
202 | } | |
203 | ||
193e3b1a AC |
204 | /* Misc helper functions for targets. */ |
205 | ||
f517ea4e | 206 | CORE_ADDR |
875e1767 | 207 | core_addr_identity (CORE_ADDR addr) |
f517ea4e PS |
208 | { |
209 | return addr; | |
210 | } | |
211 | ||
e2d0e7eb AC |
212 | CORE_ADDR |
213 | convert_from_func_ptr_addr_identity (struct gdbarch *gdbarch, CORE_ADDR addr, | |
214 | struct target_ops *targ) | |
215 | { | |
216 | return addr; | |
217 | } | |
218 | ||
88c72b7d AC |
219 | int |
220 | no_op_reg_to_regnum (int reg) | |
221 | { | |
222 | return reg; | |
223 | } | |
224 | ||
a2cf933a EZ |
225 | void |
226 | default_elf_make_msymbol_special (asymbol *sym, struct minimal_symbol *msym) | |
227 | { | |
228 | return; | |
229 | } | |
230 | ||
231 | void | |
232 | default_coff_make_msymbol_special (int val, struct minimal_symbol *msym) | |
233 | { | |
234 | return; | |
235 | } | |
236 | ||
01fb7433 AC |
237 | int |
238 | cannot_register_not (int regnum) | |
239 | { | |
240 | return 0; | |
241 | } | |
39d4ef09 AC |
242 | |
243 | /* Legacy version of target_virtual_frame_pointer(). Assumes that | |
0ba6dca9 AC |
244 | there is an DEPRECATED_FP_REGNUM and that it is the same, cooked or |
245 | raw. */ | |
39d4ef09 AC |
246 | |
247 | void | |
248 | legacy_virtual_frame_pointer (CORE_ADDR pc, | |
249 | int *frame_regnum, | |
250 | LONGEST *frame_offset) | |
251 | { | |
20bcf01c AC |
252 | /* FIXME: cagney/2002-09-13: This code is used when identifying the |
253 | frame pointer of the current PC. It is assuming that a single | |
254 | register and an offset can determine this. I think it should | |
255 | instead generate a byte code expression as that would work better | |
256 | with things like Dwarf2's CFI. */ | |
0ba6dca9 AC |
257 | if (DEPRECATED_FP_REGNUM >= 0 && DEPRECATED_FP_REGNUM < NUM_REGS) |
258 | *frame_regnum = DEPRECATED_FP_REGNUM; | |
20bcf01c AC |
259 | else if (SP_REGNUM >= 0 && SP_REGNUM < NUM_REGS) |
260 | *frame_regnum = SP_REGNUM; | |
261 | else | |
262 | /* Should this be an internal error? I guess so, it is reflecting | |
263 | an architectural limitation in the current design. */ | |
edefbb7c | 264 | internal_error (__FILE__, __LINE__, _("No virtual frame pointer available")); |
39d4ef09 AC |
265 | *frame_offset = 0; |
266 | } | |
46cd78fb | 267 | |
b2e75d78 AC |
268 | /* Assume the world is sane, every register's virtual and real size |
269 | is identical. */ | |
46cd78fb AC |
270 | |
271 | int | |
b2e75d78 | 272 | generic_register_size (int regnum) |
46cd78fb AC |
273 | { |
274 | gdb_assert (regnum >= 0 && regnum < NUM_REGS + NUM_PSEUDO_REGS); | |
01e1877c | 275 | return TYPE_LENGTH (gdbarch_register_type (current_gdbarch, regnum)); |
ce29138a MS |
276 | } |
277 | ||
a7e3c2ad AC |
278 | /* Assume all registers are adjacent. */ |
279 | ||
280 | int | |
281 | generic_register_byte (int regnum) | |
282 | { | |
283 | int byte; | |
284 | int i; | |
285 | gdb_assert (regnum >= 0 && regnum < NUM_REGS + NUM_PSEUDO_REGS); | |
286 | byte = 0; | |
287 | for (i = 0; i < regnum; i++) | |
288 | { | |
0aa7e1aa | 289 | byte += generic_register_size (i); |
a7e3c2ad AC |
290 | } |
291 | return byte; | |
292 | } | |
293 | ||
d7bd68ca AC |
294 | \f |
295 | int | |
296 | legacy_pc_in_sigtramp (CORE_ADDR pc, char *name) | |
297 | { | |
8c6b0e06 | 298 | #if defined (DEPRECATED_IN_SIGTRAMP) |
dbfe4626 | 299 | return DEPRECATED_IN_SIGTRAMP (pc, name); |
8c6b0e06 AC |
300 | #else |
301 | return name && strcmp ("_sigtramp", name) == 0; | |
db54fef4 | 302 | #endif |
d7bd68ca AC |
303 | } |
304 | ||
13d01224 | 305 | int |
a1f4a1b6 | 306 | generic_convert_register_p (int regnum, struct type *type) |
13d01224 | 307 | { |
9730f241 | 308 | return 0; |
13d01224 AC |
309 | } |
310 | ||
192cb3d4 MK |
311 | int |
312 | default_stabs_argument_has_addr (struct gdbarch *gdbarch, struct type *type) | |
313 | { | |
314 | if (DEPRECATED_REG_STRUCT_HAS_ADDR_P () | |
315 | && DEPRECATED_REG_STRUCT_HAS_ADDR (processing_gcc_compilation, type)) | |
316 | { | |
317 | CHECK_TYPEDEF (type); | |
318 | ||
319 | return (TYPE_CODE (type) == TYPE_CODE_STRUCT | |
320 | || TYPE_CODE (type) == TYPE_CODE_UNION | |
321 | || TYPE_CODE (type) == TYPE_CODE_SET | |
322 | || TYPE_CODE (type) == TYPE_CODE_BITSTRING); | |
323 | } | |
324 | ||
325 | return 0; | |
326 | } | |
327 | ||
3ca64954 RC |
328 | int |
329 | generic_instruction_nullified (struct gdbarch *gdbarch, | |
330 | struct regcache *regcache) | |
331 | { | |
332 | return 0; | |
333 | } | |
334 | ||
01fb7433 | 335 | \f |
b4a20239 AC |
336 | /* Functions to manipulate the endianness of the target. */ |
337 | ||
7a107747 | 338 | static int target_byte_order_user = BFD_ENDIAN_UNKNOWN; |
b4a20239 | 339 | |
53904c9e AC |
340 | static const char endian_big[] = "big"; |
341 | static const char endian_little[] = "little"; | |
342 | static const char endian_auto[] = "auto"; | |
343 | static const char *endian_enum[] = | |
b4a20239 AC |
344 | { |
345 | endian_big, | |
346 | endian_little, | |
347 | endian_auto, | |
348 | NULL, | |
349 | }; | |
53904c9e | 350 | static const char *set_endian_string; |
b4a20239 AC |
351 | |
352 | /* Called by ``show endian''. */ | |
353 | ||
354 | static void | |
7ab04401 AC |
355 | show_endian (struct ui_file *file, int from_tty, struct cmd_list_element *c, |
356 | const char *value) | |
b4a20239 | 357 | { |
7a107747 | 358 | if (target_byte_order_user != BFD_ENDIAN_UNKNOWN) |
edefbb7c | 359 | if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) |
7ab04401 AC |
360 | fprintf_unfiltered (file, _("The target endianness is set automatically " |
361 | "(currently big endian)\n")); | |
edefbb7c | 362 | else |
7ab04401 | 363 | fprintf_unfiltered (file, _("The target endianness is set automatically " |
edefbb7c | 364 | "(currently little endian)\n")); |
b4a20239 | 365 | else |
edefbb7c | 366 | if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) |
7ab04401 AC |
367 | fprintf_unfiltered (file, |
368 | _("The target is assumed to be big endian\n")); | |
369 | else | |
370 | fprintf_unfiltered (file, | |
371 | _("The target is assumed to be little endian\n")); | |
b4a20239 AC |
372 | } |
373 | ||
374 | static void | |
375 | set_endian (char *ignore_args, int from_tty, struct cmd_list_element *c) | |
376 | { | |
7a107747 DJ |
377 | struct gdbarch_info info; |
378 | ||
379 | gdbarch_info_init (&info); | |
380 | ||
3fd3d7d2 | 381 | if (set_endian_string == endian_auto) |
b4a20239 | 382 | { |
7a107747 DJ |
383 | target_byte_order_user = BFD_ENDIAN_UNKNOWN; |
384 | if (! gdbarch_update_p (info)) | |
385 | internal_error (__FILE__, __LINE__, | |
386 | _("set_endian: architecture update failed")); | |
b4a20239 AC |
387 | } |
388 | else if (set_endian_string == endian_little) | |
389 | { | |
d90cf509 AC |
390 | info.byte_order = BFD_ENDIAN_LITTLE; |
391 | if (! gdbarch_update_p (info)) | |
edefbb7c | 392 | printf_unfiltered (_("Little endian target not supported by GDB\n")); |
7a107747 DJ |
393 | else |
394 | target_byte_order_user = BFD_ENDIAN_LITTLE; | |
b4a20239 AC |
395 | } |
396 | else if (set_endian_string == endian_big) | |
397 | { | |
d90cf509 AC |
398 | info.byte_order = BFD_ENDIAN_BIG; |
399 | if (! gdbarch_update_p (info)) | |
edefbb7c | 400 | printf_unfiltered (_("Big endian target not supported by GDB\n")); |
7a107747 DJ |
401 | else |
402 | target_byte_order_user = BFD_ENDIAN_BIG; | |
b4a20239 AC |
403 | } |
404 | else | |
8e65ff28 | 405 | internal_error (__FILE__, __LINE__, |
edefbb7c | 406 | _("set_endian: bad value")); |
7a107747 | 407 | |
7ab04401 | 408 | show_endian (gdb_stdout, from_tty, NULL, NULL); |
b4a20239 AC |
409 | } |
410 | ||
b4a20239 AC |
411 | /* Functions to manipulate the architecture of the target */ |
412 | ||
413 | enum set_arch { set_arch_auto, set_arch_manual }; | |
414 | ||
7a107747 | 415 | static const struct bfd_arch_info *target_architecture_user; |
b4a20239 | 416 | |
a8cf2722 AC |
417 | static const char *set_architecture_string; |
418 | ||
419 | const char * | |
420 | selected_architecture_name (void) | |
421 | { | |
7a107747 | 422 | if (target_architecture_user == NULL) |
a8cf2722 AC |
423 | return NULL; |
424 | else | |
425 | return set_architecture_string; | |
426 | } | |
b4a20239 | 427 | |
b4a20239 AC |
428 | /* Called if the user enters ``show architecture'' without an |
429 | argument. */ | |
430 | ||
431 | static void | |
7ab04401 AC |
432 | show_architecture (struct ui_file *file, int from_tty, |
433 | struct cmd_list_element *c, const char *value) | |
b4a20239 AC |
434 | { |
435 | const char *arch; | |
436 | arch = TARGET_ARCHITECTURE->printable_name; | |
7a107747 | 437 | if (target_architecture_user == NULL) |
7ab04401 AC |
438 | fprintf_filtered (file, _("\ |
439 | The target architecture is set automatically (currently %s)\n"), arch); | |
b4a20239 | 440 | else |
7ab04401 AC |
441 | fprintf_filtered (file, _("\ |
442 | The target architecture is assumed to be %s\n"), arch); | |
b4a20239 AC |
443 | } |
444 | ||
445 | ||
446 | /* Called if the user enters ``set architecture'' with or without an | |
447 | argument. */ | |
448 | ||
449 | static void | |
450 | set_architecture (char *ignore_args, int from_tty, struct cmd_list_element *c) | |
451 | { | |
7a107747 DJ |
452 | struct gdbarch_info info; |
453 | ||
454 | gdbarch_info_init (&info); | |
455 | ||
b4a20239 AC |
456 | if (strcmp (set_architecture_string, "auto") == 0) |
457 | { | |
7a107747 DJ |
458 | target_architecture_user = NULL; |
459 | if (!gdbarch_update_p (info)) | |
460 | internal_error (__FILE__, __LINE__, | |
461 | _("could not select an architecture automatically")); | |
b4a20239 | 462 | } |
d90cf509 | 463 | else |
b4a20239 | 464 | { |
b4a20239 AC |
465 | info.bfd_arch_info = bfd_scan_arch (set_architecture_string); |
466 | if (info.bfd_arch_info == NULL) | |
8e65ff28 | 467 | internal_error (__FILE__, __LINE__, |
edefbb7c | 468 | _("set_architecture: bfd_scan_arch failed")); |
16f33e29 | 469 | if (gdbarch_update_p (info)) |
7a107747 | 470 | target_architecture_user = info.bfd_arch_info; |
b4a20239 | 471 | else |
edefbb7c | 472 | printf_unfiltered (_("Architecture `%s' not recognized.\n"), |
b4a20239 AC |
473 | set_architecture_string); |
474 | } | |
7ab04401 | 475 | show_architecture (gdb_stdout, from_tty, NULL, NULL); |
b4a20239 AC |
476 | } |
477 | ||
ebdba546 AC |
478 | /* Try to select a global architecture that matches "info". Return |
479 | non-zero if the attempt succeds. */ | |
480 | int | |
481 | gdbarch_update_p (struct gdbarch_info info) | |
482 | { | |
483 | struct gdbarch *new_gdbarch = gdbarch_find_by_info (info); | |
484 | ||
485 | /* If there no architecture by that name, reject the request. */ | |
486 | if (new_gdbarch == NULL) | |
487 | { | |
488 | if (gdbarch_debug) | |
489 | fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: " | |
490 | "Architecture not found\n"); | |
491 | return 0; | |
492 | } | |
493 | ||
494 | /* If it is the same old architecture, accept the request (but don't | |
495 | swap anything). */ | |
496 | if (new_gdbarch == current_gdbarch) | |
497 | { | |
498 | if (gdbarch_debug) | |
499 | fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: " | |
500 | "Architecture 0x%08lx (%s) unchanged\n", | |
501 | (long) new_gdbarch, | |
502 | gdbarch_bfd_arch_info (new_gdbarch)->printable_name); | |
503 | return 1; | |
504 | } | |
505 | ||
506 | /* It's a new architecture, swap it in. */ | |
507 | if (gdbarch_debug) | |
508 | fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: " | |
509 | "New architecture 0x%08lx (%s) selected\n", | |
510 | (long) new_gdbarch, | |
511 | gdbarch_bfd_arch_info (new_gdbarch)->printable_name); | |
512 | deprecated_current_gdbarch_select_hack (new_gdbarch); | |
513 | ||
514 | return 1; | |
515 | } | |
516 | ||
2b026650 MK |
517 | /* Return the architecture for ABFD. If no suitable architecture |
518 | could be find, return NULL. */ | |
519 | ||
520 | struct gdbarch * | |
521 | gdbarch_from_bfd (bfd *abfd) | |
b4a20239 | 522 | { |
2b026650 MK |
523 | struct gdbarch *old_gdbarch = current_gdbarch; |
524 | struct gdbarch *new_gdbarch; | |
d90cf509 | 525 | struct gdbarch_info info; |
2b026650 | 526 | |
7a107747 DJ |
527 | /* If we call gdbarch_find_by_info without filling in info.abfd, |
528 | then it will use the global exec_bfd. That's fine if we don't | |
529 | have one of those either. And that's the only time we should | |
530 | reach here with a NULL ABFD argument - when we are discarding | |
531 | the executable. */ | |
532 | gdb_assert (abfd != NULL || exec_bfd == NULL); | |
533 | ||
d90cf509 AC |
534 | gdbarch_info_init (&info); |
535 | info.abfd = abfd; | |
b60eb90d | 536 | return gdbarch_find_by_info (info); |
2b026650 MK |
537 | } |
538 | ||
539 | /* Set the dynamic target-system-dependent parameters (architecture, | |
540 | byte-order) using information found in the BFD */ | |
541 | ||
542 | void | |
543 | set_gdbarch_from_file (bfd *abfd) | |
544 | { | |
545 | struct gdbarch *gdbarch; | |
546 | ||
547 | gdbarch = gdbarch_from_bfd (abfd); | |
548 | if (gdbarch == NULL) | |
8a3fe4f8 | 549 | error (_("Architecture of file not recognized.")); |
b60eb90d | 550 | deprecated_current_gdbarch_select_hack (gdbarch); |
b4a20239 AC |
551 | } |
552 | ||
553 | /* Initialize the current architecture. Update the ``set | |
554 | architecture'' command so that it specifies a list of valid | |
555 | architectures. */ | |
556 | ||
1ba607ad AC |
557 | #ifdef DEFAULT_BFD_ARCH |
558 | extern const bfd_arch_info_type DEFAULT_BFD_ARCH; | |
559 | static const bfd_arch_info_type *default_bfd_arch = &DEFAULT_BFD_ARCH; | |
560 | #else | |
4b9b3959 | 561 | static const bfd_arch_info_type *default_bfd_arch; |
1ba607ad AC |
562 | #endif |
563 | ||
564 | #ifdef DEFAULT_BFD_VEC | |
565 | extern const bfd_target DEFAULT_BFD_VEC; | |
566 | static const bfd_target *default_bfd_vec = &DEFAULT_BFD_VEC; | |
567 | #else | |
568 | static const bfd_target *default_bfd_vec; | |
569 | #endif | |
570 | ||
7a107747 DJ |
571 | static int default_byte_order = BFD_ENDIAN_UNKNOWN; |
572 | ||
b4a20239 AC |
573 | void |
574 | initialize_current_architecture (void) | |
575 | { | |
576 | const char **arches = gdbarch_printable_names (); | |
b4a20239 | 577 | |
1ba607ad AC |
578 | /* determine a default architecture and byte order. */ |
579 | struct gdbarch_info info; | |
fb6ecb0f | 580 | gdbarch_info_init (&info); |
1ba607ad AC |
581 | |
582 | /* Find a default architecture. */ | |
7a107747 | 583 | if (default_bfd_arch == NULL) |
b4a20239 | 584 | { |
1ba607ad AC |
585 | /* Choose the architecture by taking the first one |
586 | alphabetically. */ | |
587 | const char *chosen = arches[0]; | |
b4a20239 | 588 | const char **arch; |
b4a20239 AC |
589 | for (arch = arches; *arch != NULL; arch++) |
590 | { | |
b4a20239 AC |
591 | if (strcmp (*arch, chosen) < 0) |
592 | chosen = *arch; | |
593 | } | |
594 | if (chosen == NULL) | |
8e65ff28 | 595 | internal_error (__FILE__, __LINE__, |
edefbb7c | 596 | _("initialize_current_architecture: No arch")); |
7a107747 DJ |
597 | default_bfd_arch = bfd_scan_arch (chosen); |
598 | if (default_bfd_arch == NULL) | |
8e65ff28 | 599 | internal_error (__FILE__, __LINE__, |
edefbb7c | 600 | _("initialize_current_architecture: Arch not found")); |
1ba607ad AC |
601 | } |
602 | ||
7a107747 DJ |
603 | info.bfd_arch_info = default_bfd_arch; |
604 | ||
afe64c1a | 605 | /* Take several guesses at a byte order. */ |
7a107747 | 606 | if (default_byte_order == BFD_ENDIAN_UNKNOWN |
1ba607ad AC |
607 | && default_bfd_vec != NULL) |
608 | { | |
609 | /* Extract BFD's default vector's byte order. */ | |
610 | switch (default_bfd_vec->byteorder) | |
611 | { | |
612 | case BFD_ENDIAN_BIG: | |
7a107747 | 613 | default_byte_order = BFD_ENDIAN_BIG; |
1ba607ad AC |
614 | break; |
615 | case BFD_ENDIAN_LITTLE: | |
7a107747 | 616 | default_byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad AC |
617 | break; |
618 | default: | |
619 | break; | |
620 | } | |
621 | } | |
7a107747 | 622 | if (default_byte_order == BFD_ENDIAN_UNKNOWN) |
1ba607ad AC |
623 | { |
624 | /* look for ``*el-*'' in the target name. */ | |
625 | const char *chp; | |
626 | chp = strchr (target_name, '-'); | |
627 | if (chp != NULL | |
628 | && chp - 2 >= target_name | |
629 | && strncmp (chp - 2, "el", 2) == 0) | |
7a107747 | 630 | default_byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad | 631 | } |
7a107747 | 632 | if (default_byte_order == BFD_ENDIAN_UNKNOWN) |
1ba607ad AC |
633 | { |
634 | /* Wire it to big-endian!!! */ | |
7a107747 | 635 | default_byte_order = BFD_ENDIAN_BIG; |
1ba607ad AC |
636 | } |
637 | ||
7a107747 DJ |
638 | info.byte_order = default_byte_order; |
639 | ||
d90cf509 AC |
640 | if (! gdbarch_update_p (info)) |
641 | internal_error (__FILE__, __LINE__, | |
edefbb7c AC |
642 | _("initialize_current_architecture: Selection of " |
643 | "initial architecture failed")); | |
b4a20239 | 644 | |
1ba607ad AC |
645 | /* Create the ``set architecture'' command appending ``auto'' to the |
646 | list of architectures. */ | |
b4a20239 AC |
647 | { |
648 | struct cmd_list_element *c; | |
649 | /* Append ``auto''. */ | |
650 | int nr; | |
651 | for (nr = 0; arches[nr] != NULL; nr++); | |
652 | arches = xrealloc (arches, sizeof (char*) * (nr + 2)); | |
653 | arches[nr + 0] = "auto"; | |
654 | arches[nr + 1] = NULL; | |
7ab04401 AC |
655 | add_setshow_enum_cmd ("architecture", class_support, |
656 | arches, &set_architecture_string, _("\ | |
657 | Set architecture of target."), _("\ | |
658 | Show architecture of target."), NULL, | |
659 | set_architecture, show_architecture, | |
660 | &setlist, &showlist); | |
b4a20239 | 661 | add_alias_cmd ("processor", "architecture", class_support, 1, &setlist); |
b4a20239 AC |
662 | } |
663 | } | |
664 | ||
665 | ||
fb6ecb0f AC |
666 | /* Initialize a gdbarch info to values that will be automatically |
667 | overridden. Note: Originally, this ``struct info'' was initialized | |
ce2826aa | 668 | using memset(0). Unfortunately, that ran into problems, namely |
fb6ecb0f AC |
669 | BFD_ENDIAN_BIG is zero. An explicit initialization function that |
670 | can explicitly set each field to a well defined value is used. */ | |
671 | ||
672 | void | |
673 | gdbarch_info_init (struct gdbarch_info *info) | |
674 | { | |
675 | memset (info, 0, sizeof (struct gdbarch_info)); | |
428721aa | 676 | info->byte_order = BFD_ENDIAN_UNKNOWN; |
4be87837 | 677 | info->osabi = GDB_OSABI_UNINITIALIZED; |
fb6ecb0f AC |
678 | } |
679 | ||
100bcc3f | 680 | /* Similar to init, but this time fill in the blanks. Information is |
7a107747 DJ |
681 | obtained from the global "set ..." options and explicitly |
682 | initialized INFO fields. */ | |
bf922ad9 AC |
683 | |
684 | void | |
7a107747 | 685 | gdbarch_info_fill (struct gdbarch_info *info) |
bf922ad9 | 686 | { |
7a107747 DJ |
687 | /* Check for the current file. */ |
688 | if (info->abfd == NULL) | |
689 | info->abfd = exec_bfd; | |
690 | ||
bf922ad9 AC |
691 | /* "(gdb) set architecture ...". */ |
692 | if (info->bfd_arch_info == NULL | |
7a107747 DJ |
693 | && target_architecture_user) |
694 | info->bfd_arch_info = target_architecture_user; | |
bf922ad9 AC |
695 | if (info->bfd_arch_info == NULL |
696 | && info->abfd != NULL | |
697 | && bfd_get_arch (info->abfd) != bfd_arch_unknown | |
698 | && bfd_get_arch (info->abfd) != bfd_arch_obscure) | |
699 | info->bfd_arch_info = bfd_get_arch_info (info->abfd); | |
7a107747 DJ |
700 | /* From the default. */ |
701 | if (info->bfd_arch_info == NULL) | |
702 | info->bfd_arch_info = default_bfd_arch; | |
bf922ad9 AC |
703 | |
704 | /* "(gdb) set byte-order ...". */ | |
705 | if (info->byte_order == BFD_ENDIAN_UNKNOWN | |
7a107747 DJ |
706 | && target_byte_order_user != BFD_ENDIAN_UNKNOWN) |
707 | info->byte_order = target_byte_order_user; | |
bf922ad9 AC |
708 | /* From the INFO struct. */ |
709 | if (info->byte_order == BFD_ENDIAN_UNKNOWN | |
710 | && info->abfd != NULL) | |
711 | info->byte_order = (bfd_big_endian (info->abfd) ? BFD_ENDIAN_BIG | |
7a107747 DJ |
712 | : bfd_little_endian (info->abfd) ? BFD_ENDIAN_LITTLE |
713 | : BFD_ENDIAN_UNKNOWN); | |
714 | /* From the default. */ | |
715 | if (info->byte_order == BFD_ENDIAN_UNKNOWN) | |
716 | info->byte_order = default_byte_order; | |
bf922ad9 AC |
717 | |
718 | /* "(gdb) set osabi ...". Handled by gdbarch_lookup_osabi. */ | |
719 | if (info->osabi == GDB_OSABI_UNINITIALIZED) | |
720 | info->osabi = gdbarch_lookup_osabi (info->abfd); | |
bf922ad9 AC |
721 | |
722 | /* Must have at least filled in the architecture. */ | |
723 | gdb_assert (info->bfd_arch_info != NULL); | |
724 | } | |
725 | ||
c0e8c252 AC |
726 | /* */ |
727 | ||
a78f21af | 728 | extern initialize_file_ftype _initialize_gdbarch_utils; /* -Wmissing-prototypes */ |
c0e8c252 AC |
729 | |
730 | void | |
b4a20239 | 731 | _initialize_gdbarch_utils (void) |
c0e8c252 | 732 | { |
b4a20239 | 733 | struct cmd_list_element *c; |
7ab04401 AC |
734 | add_setshow_enum_cmd ("endian", class_support, |
735 | endian_enum, &set_endian_string, _("\ | |
736 | Set endianness of target."), _("\ | |
737 | Show endianness of target."), NULL, | |
738 | set_endian, show_endian, | |
739 | &setlist, &showlist); | |
c0e8c252 | 740 | } |