Commit | Line | Data |
---|---|---|
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 | ||
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" |
c0e8c252 | 33 | |
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 | ||
63 | ||
1fd35568 JB |
64 | int |
65 | always_use_struct_convention (int gcc_p, struct type *value_type) | |
66 | { | |
67 | return 1; | |
68 | } | |
69 | ||
70 | ||
4182591f AC |
71 | int |
72 | legacy_register_sim_regno (int regnum) | |
73 | { | |
74 | /* Only makes sense to supply raw registers. */ | |
75 | gdb_assert (regnum >= 0 && regnum < NUM_REGS); | |
76 | /* NOTE: cagney/2002-05-13: The old code did it this way and it is | |
77 | suspected that some GDB/SIM combinations may rely on this | |
78 | behavour. The default should be one2one_register_sim_regno | |
79 | (below). */ | |
80 | if (REGISTER_NAME (regnum) != NULL | |
81 | && REGISTER_NAME (regnum)[0] != '\0') | |
82 | return regnum; | |
83 | else | |
84 | return LEGACY_SIM_REGNO_IGNORE; | |
85 | } | |
86 | ||
bdcd319a CV |
87 | CORE_ADDR |
88 | generic_skip_trampoline_code (CORE_ADDR pc) | |
89 | { | |
90 | return 0; | |
91 | } | |
92 | ||
dea0c52f | 93 | CORE_ADDR |
4c8c40e6 | 94 | generic_skip_solib_resolver (struct gdbarch *gdbarch, CORE_ADDR pc) |
dea0c52f MK |
95 | { |
96 | return 0; | |
97 | } | |
98 | ||
68e9cc94 CV |
99 | int |
100 | generic_in_solib_call_trampoline (CORE_ADDR pc, char *name) | |
101 | { | |
102 | return 0; | |
103 | } | |
104 | ||
d50355b6 MS |
105 | int |
106 | generic_in_solib_return_trampoline (CORE_ADDR pc, char *name) | |
107 | { | |
108 | return 0; | |
109 | } | |
110 | ||
c12260ac CV |
111 | int |
112 | generic_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc) | |
113 | { | |
114 | return 0; | |
115 | } | |
116 | ||
c0e8c252 | 117 | void |
f6684c31 AC |
118 | generic_remote_translate_xfer_address (struct gdbarch *gdbarch, |
119 | struct regcache *regcache, | |
120 | CORE_ADDR gdb_addr, int gdb_len, | |
c0e8c252 AC |
121 | CORE_ADDR * rem_addr, int *rem_len) |
122 | { | |
123 | *rem_addr = gdb_addr; | |
124 | *rem_len = gdb_len; | |
125 | } | |
126 | ||
3339cf8b AC |
127 | /* Helper functions for INNER_THAN */ |
128 | ||
129 | int | |
fba45db2 | 130 | core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs) |
3339cf8b AC |
131 | { |
132 | return (lhs < rhs); | |
133 | } | |
134 | ||
135 | int | |
fba45db2 | 136 | core_addr_greaterthan (CORE_ADDR lhs, CORE_ADDR rhs) |
3339cf8b AC |
137 | { |
138 | return (lhs > rhs); | |
139 | } | |
140 | ||
141 | ||
f0d4cc9e AC |
142 | /* Helper functions for TARGET_{FLOAT,DOUBLE}_FORMAT */ |
143 | ||
144 | const struct floatformat * | |
145 | default_float_format (struct gdbarch *gdbarch) | |
146 | { | |
f0d4cc9e | 147 | int byte_order = gdbarch_byte_order (gdbarch); |
f0d4cc9e AC |
148 | switch (byte_order) |
149 | { | |
d7449b42 | 150 | case BFD_ENDIAN_BIG: |
f0d4cc9e | 151 | return &floatformat_ieee_single_big; |
778eb05e | 152 | case BFD_ENDIAN_LITTLE: |
f0d4cc9e AC |
153 | return &floatformat_ieee_single_little; |
154 | default: | |
8e65ff28 AC |
155 | internal_error (__FILE__, __LINE__, |
156 | "default_float_format: bad byte order"); | |
f0d4cc9e AC |
157 | } |
158 | } | |
159 | ||
160 | ||
161 | const struct floatformat * | |
162 | default_double_format (struct gdbarch *gdbarch) | |
163 | { | |
f0d4cc9e | 164 | int byte_order = gdbarch_byte_order (gdbarch); |
f0d4cc9e AC |
165 | switch (byte_order) |
166 | { | |
d7449b42 | 167 | case BFD_ENDIAN_BIG: |
f0d4cc9e | 168 | return &floatformat_ieee_double_big; |
778eb05e | 169 | case BFD_ENDIAN_LITTLE: |
f0d4cc9e AC |
170 | return &floatformat_ieee_double_little; |
171 | default: | |
8e65ff28 AC |
172 | internal_error (__FILE__, __LINE__, |
173 | "default_double_format: bad byte order"); | |
f0d4cc9e AC |
174 | } |
175 | } | |
176 | ||
193e3b1a AC |
177 | /* Misc helper functions for targets. */ |
178 | ||
f517ea4e | 179 | CORE_ADDR |
875e1767 | 180 | core_addr_identity (CORE_ADDR addr) |
f517ea4e PS |
181 | { |
182 | return addr; | |
183 | } | |
184 | ||
e2d0e7eb AC |
185 | CORE_ADDR |
186 | convert_from_func_ptr_addr_identity (struct gdbarch *gdbarch, CORE_ADDR addr, | |
187 | struct target_ops *targ) | |
188 | { | |
189 | return addr; | |
190 | } | |
191 | ||
88c72b7d AC |
192 | int |
193 | no_op_reg_to_regnum (int reg) | |
194 | { | |
195 | return reg; | |
196 | } | |
197 | ||
97f46953 | 198 | CORE_ADDR |
0968aa8c | 199 | deprecated_init_frame_pc_default (int fromleaf, struct frame_info *prev) |
7824d2f2 | 200 | { |
6913c89a AC |
201 | if (fromleaf && DEPRECATED_SAVED_PC_AFTER_CALL_P ()) |
202 | return DEPRECATED_SAVED_PC_AFTER_CALL (get_next_frame (prev)); | |
75e3c1f9 | 203 | else if (get_next_frame (prev) != NULL) |
8bedc050 | 204 | return DEPRECATED_FRAME_SAVED_PC (get_next_frame (prev)); |
7824d2f2 | 205 | else |
97f46953 | 206 | return read_pc (); |
7824d2f2 AC |
207 | } |
208 | ||
a2cf933a EZ |
209 | void |
210 | default_elf_make_msymbol_special (asymbol *sym, struct minimal_symbol *msym) | |
211 | { | |
212 | return; | |
213 | } | |
214 | ||
215 | void | |
216 | default_coff_make_msymbol_special (int val, struct minimal_symbol *msym) | |
217 | { | |
218 | return; | |
219 | } | |
220 | ||
01fb7433 AC |
221 | int |
222 | cannot_register_not (int regnum) | |
223 | { | |
224 | return 0; | |
225 | } | |
39d4ef09 AC |
226 | |
227 | /* Legacy version of target_virtual_frame_pointer(). Assumes that | |
0ba6dca9 AC |
228 | there is an DEPRECATED_FP_REGNUM and that it is the same, cooked or |
229 | raw. */ | |
39d4ef09 AC |
230 | |
231 | void | |
232 | legacy_virtual_frame_pointer (CORE_ADDR pc, | |
233 | int *frame_regnum, | |
234 | LONGEST *frame_offset) | |
235 | { | |
20bcf01c AC |
236 | /* FIXME: cagney/2002-09-13: This code is used when identifying the |
237 | frame pointer of the current PC. It is assuming that a single | |
238 | register and an offset can determine this. I think it should | |
239 | instead generate a byte code expression as that would work better | |
240 | with things like Dwarf2's CFI. */ | |
0ba6dca9 AC |
241 | if (DEPRECATED_FP_REGNUM >= 0 && DEPRECATED_FP_REGNUM < NUM_REGS) |
242 | *frame_regnum = DEPRECATED_FP_REGNUM; | |
20bcf01c AC |
243 | else if (SP_REGNUM >= 0 && SP_REGNUM < NUM_REGS) |
244 | *frame_regnum = SP_REGNUM; | |
245 | else | |
246 | /* Should this be an internal error? I guess so, it is reflecting | |
247 | an architectural limitation in the current design. */ | |
248 | internal_error (__FILE__, __LINE__, "No virtual frame pointer available"); | |
39d4ef09 AC |
249 | *frame_offset = 0; |
250 | } | |
46cd78fb | 251 | |
b2e75d78 AC |
252 | /* Assume the world is sane, every register's virtual and real size |
253 | is identical. */ | |
46cd78fb AC |
254 | |
255 | int | |
b2e75d78 | 256 | generic_register_size (int regnum) |
46cd78fb AC |
257 | { |
258 | gdb_assert (regnum >= 0 && regnum < NUM_REGS + NUM_PSEUDO_REGS); | |
35cac7cf AC |
259 | if (gdbarch_register_type_p (current_gdbarch)) |
260 | return TYPE_LENGTH (gdbarch_register_type (current_gdbarch, regnum)); | |
261 | else | |
262 | /* FIXME: cagney/2003-03-01: Once all architectures implement | |
263 | gdbarch_register_type(), this entire function can go away. It | |
264 | is made obsolete by register_size(). */ | |
2e092625 | 265 | return TYPE_LENGTH (DEPRECATED_REGISTER_VIRTUAL_TYPE (regnum)); /* OK */ |
ce29138a MS |
266 | } |
267 | ||
a7e3c2ad AC |
268 | /* Assume all registers are adjacent. */ |
269 | ||
270 | int | |
271 | generic_register_byte (int regnum) | |
272 | { | |
273 | int byte; | |
274 | int i; | |
275 | gdb_assert (regnum >= 0 && regnum < NUM_REGS + NUM_PSEUDO_REGS); | |
276 | byte = 0; | |
277 | for (i = 0; i < regnum; i++) | |
278 | { | |
0aa7e1aa | 279 | byte += generic_register_size (i); |
a7e3c2ad AC |
280 | } |
281 | return byte; | |
282 | } | |
283 | ||
d7bd68ca AC |
284 | \f |
285 | int | |
286 | legacy_pc_in_sigtramp (CORE_ADDR pc, char *name) | |
287 | { | |
8c6b0e06 | 288 | #if defined (DEPRECATED_IN_SIGTRAMP) |
dbfe4626 | 289 | return DEPRECATED_IN_SIGTRAMP (pc, name); |
8c6b0e06 AC |
290 | #else |
291 | return name && strcmp ("_sigtramp", name) == 0; | |
db54fef4 | 292 | #endif |
d7bd68ca AC |
293 | } |
294 | ||
13d01224 | 295 | int |
a1f4a1b6 | 296 | generic_convert_register_p (int regnum, struct type *type) |
13d01224 | 297 | { |
9730f241 | 298 | return 0; |
13d01224 AC |
299 | } |
300 | ||
192cb3d4 MK |
301 | int |
302 | default_stabs_argument_has_addr (struct gdbarch *gdbarch, struct type *type) | |
303 | { | |
304 | if (DEPRECATED_REG_STRUCT_HAS_ADDR_P () | |
305 | && DEPRECATED_REG_STRUCT_HAS_ADDR (processing_gcc_compilation, type)) | |
306 | { | |
307 | CHECK_TYPEDEF (type); | |
308 | ||
309 | return (TYPE_CODE (type) == TYPE_CODE_STRUCT | |
310 | || TYPE_CODE (type) == TYPE_CODE_UNION | |
311 | || TYPE_CODE (type) == TYPE_CODE_SET | |
312 | || TYPE_CODE (type) == TYPE_CODE_BITSTRING); | |
313 | } | |
314 | ||
315 | return 0; | |
316 | } | |
317 | ||
01fb7433 | 318 | \f |
b4a20239 AC |
319 | /* Functions to manipulate the endianness of the target. */ |
320 | ||
1ba607ad | 321 | /* ``target_byte_order'' is only used when non- multi-arch. |
afe64c1a AC |
322 | Multi-arch targets obtain the current byte order using the |
323 | TARGET_BYTE_ORDER gdbarch method. | |
324 | ||
325 | The choice of initial value is entirely arbitrary. During startup, | |
326 | the function initialize_current_architecture() updates this value | |
327 | based on default byte-order information extracted from BFD. */ | |
a8cf2722 AC |
328 | static int target_byte_order = BFD_ENDIAN_BIG; |
329 | static int target_byte_order_auto = 1; | |
330 | ||
331 | enum bfd_endian | |
332 | selected_byte_order (void) | |
333 | { | |
334 | if (target_byte_order_auto) | |
335 | return BFD_ENDIAN_UNKNOWN; | |
336 | else | |
337 | return target_byte_order; | |
338 | } | |
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 | |
355 | show_endian (char *args, int from_tty) | |
356 | { | |
a8cf2722 | 357 | if (target_byte_order_auto) |
b4a20239 | 358 | printf_unfiltered ("The target endianness is set automatically (currently %s endian)\n", |
d7449b42 | 359 | (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little")); |
b4a20239 AC |
360 | else |
361 | printf_unfiltered ("The target is assumed to be %s endian\n", | |
d7449b42 | 362 | (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little")); |
b4a20239 AC |
363 | } |
364 | ||
365 | static void | |
366 | set_endian (char *ignore_args, int from_tty, struct cmd_list_element *c) | |
367 | { | |
3fd3d7d2 | 368 | if (set_endian_string == endian_auto) |
b4a20239 AC |
369 | { |
370 | target_byte_order_auto = 1; | |
371 | } | |
372 | else if (set_endian_string == endian_little) | |
373 | { | |
d90cf509 | 374 | struct gdbarch_info info; |
b4a20239 | 375 | target_byte_order_auto = 0; |
d90cf509 AC |
376 | gdbarch_info_init (&info); |
377 | info.byte_order = BFD_ENDIAN_LITTLE; | |
378 | if (! gdbarch_update_p (info)) | |
379 | printf_unfiltered ("Little endian target not supported by GDB\n"); | |
b4a20239 AC |
380 | } |
381 | else if (set_endian_string == endian_big) | |
382 | { | |
d90cf509 | 383 | struct gdbarch_info info; |
b4a20239 | 384 | target_byte_order_auto = 0; |
d90cf509 AC |
385 | gdbarch_info_init (&info); |
386 | info.byte_order = BFD_ENDIAN_BIG; | |
387 | if (! gdbarch_update_p (info)) | |
388 | printf_unfiltered ("Big endian target not supported by GDB\n"); | |
b4a20239 AC |
389 | } |
390 | else | |
8e65ff28 AC |
391 | internal_error (__FILE__, __LINE__, |
392 | "set_endian: bad value"); | |
b4a20239 AC |
393 | show_endian (NULL, from_tty); |
394 | } | |
395 | ||
b4a20239 AC |
396 | /* Functions to manipulate the architecture of the target */ |
397 | ||
398 | enum set_arch { set_arch_auto, set_arch_manual }; | |
399 | ||
a8cf2722 | 400 | static int target_architecture_auto = 1; |
b4a20239 | 401 | |
a8cf2722 AC |
402 | static const char *set_architecture_string; |
403 | ||
404 | const char * | |
405 | selected_architecture_name (void) | |
406 | { | |
407 | if (target_architecture_auto) | |
408 | return NULL; | |
409 | else | |
410 | return set_architecture_string; | |
411 | } | |
b4a20239 | 412 | |
b4a20239 AC |
413 | /* Called if the user enters ``show architecture'' without an |
414 | argument. */ | |
415 | ||
416 | static void | |
417 | show_architecture (char *args, int from_tty) | |
418 | { | |
419 | const char *arch; | |
420 | arch = TARGET_ARCHITECTURE->printable_name; | |
421 | if (target_architecture_auto) | |
422 | printf_filtered ("The target architecture is set automatically (currently %s)\n", arch); | |
423 | else | |
424 | printf_filtered ("The target architecture is assumed to be %s\n", arch); | |
425 | } | |
426 | ||
427 | ||
428 | /* Called if the user enters ``set architecture'' with or without an | |
429 | argument. */ | |
430 | ||
431 | static void | |
432 | set_architecture (char *ignore_args, int from_tty, struct cmd_list_element *c) | |
433 | { | |
434 | if (strcmp (set_architecture_string, "auto") == 0) | |
435 | { | |
436 | target_architecture_auto = 1; | |
437 | } | |
d90cf509 | 438 | else |
b4a20239 AC |
439 | { |
440 | struct gdbarch_info info; | |
fb6ecb0f | 441 | gdbarch_info_init (&info); |
b4a20239 AC |
442 | info.bfd_arch_info = bfd_scan_arch (set_architecture_string); |
443 | if (info.bfd_arch_info == NULL) | |
8e65ff28 AC |
444 | internal_error (__FILE__, __LINE__, |
445 | "set_architecture: bfd_scan_arch failed"); | |
16f33e29 | 446 | if (gdbarch_update_p (info)) |
b4a20239 AC |
447 | target_architecture_auto = 0; |
448 | else | |
ec3d358c | 449 | printf_unfiltered ("Architecture `%s' not recognized.\n", |
b4a20239 AC |
450 | set_architecture_string); |
451 | } | |
b4a20239 AC |
452 | show_architecture (NULL, from_tty); |
453 | } | |
454 | ||
ebdba546 AC |
455 | /* Try to select a global architecture that matches "info". Return |
456 | non-zero if the attempt succeds. */ | |
457 | int | |
458 | gdbarch_update_p (struct gdbarch_info info) | |
459 | { | |
460 | struct gdbarch *new_gdbarch = gdbarch_find_by_info (info); | |
461 | ||
462 | /* If there no architecture by that name, reject the request. */ | |
463 | if (new_gdbarch == NULL) | |
464 | { | |
465 | if (gdbarch_debug) | |
466 | fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: " | |
467 | "Architecture not found\n"); | |
468 | return 0; | |
469 | } | |
470 | ||
471 | /* If it is the same old architecture, accept the request (but don't | |
472 | swap anything). */ | |
473 | if (new_gdbarch == current_gdbarch) | |
474 | { | |
475 | if (gdbarch_debug) | |
476 | fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: " | |
477 | "Architecture 0x%08lx (%s) unchanged\n", | |
478 | (long) new_gdbarch, | |
479 | gdbarch_bfd_arch_info (new_gdbarch)->printable_name); | |
480 | return 1; | |
481 | } | |
482 | ||
483 | /* It's a new architecture, swap it in. */ | |
484 | if (gdbarch_debug) | |
485 | fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: " | |
486 | "New architecture 0x%08lx (%s) selected\n", | |
487 | (long) new_gdbarch, | |
488 | gdbarch_bfd_arch_info (new_gdbarch)->printable_name); | |
489 | deprecated_current_gdbarch_select_hack (new_gdbarch); | |
490 | ||
491 | return 1; | |
492 | } | |
493 | ||
2b026650 MK |
494 | /* Return the architecture for ABFD. If no suitable architecture |
495 | could be find, return NULL. */ | |
496 | ||
497 | struct gdbarch * | |
498 | gdbarch_from_bfd (bfd *abfd) | |
b4a20239 | 499 | { |
2b026650 MK |
500 | struct gdbarch *old_gdbarch = current_gdbarch; |
501 | struct gdbarch *new_gdbarch; | |
d90cf509 | 502 | struct gdbarch_info info; |
2b026650 | 503 | |
d90cf509 AC |
504 | gdbarch_info_init (&info); |
505 | info.abfd = abfd; | |
b60eb90d | 506 | return gdbarch_find_by_info (info); |
2b026650 MK |
507 | } |
508 | ||
509 | /* Set the dynamic target-system-dependent parameters (architecture, | |
510 | byte-order) using information found in the BFD */ | |
511 | ||
512 | void | |
513 | set_gdbarch_from_file (bfd *abfd) | |
514 | { | |
515 | struct gdbarch *gdbarch; | |
516 | ||
517 | gdbarch = gdbarch_from_bfd (abfd); | |
518 | if (gdbarch == NULL) | |
d90cf509 | 519 | error ("Architecture of file not recognized.\n"); |
b60eb90d | 520 | deprecated_current_gdbarch_select_hack (gdbarch); |
b4a20239 AC |
521 | } |
522 | ||
523 | /* Initialize the current architecture. Update the ``set | |
524 | architecture'' command so that it specifies a list of valid | |
525 | architectures. */ | |
526 | ||
1ba607ad AC |
527 | #ifdef DEFAULT_BFD_ARCH |
528 | extern const bfd_arch_info_type DEFAULT_BFD_ARCH; | |
529 | static const bfd_arch_info_type *default_bfd_arch = &DEFAULT_BFD_ARCH; | |
530 | #else | |
4b9b3959 | 531 | static const bfd_arch_info_type *default_bfd_arch; |
1ba607ad AC |
532 | #endif |
533 | ||
534 | #ifdef DEFAULT_BFD_VEC | |
535 | extern const bfd_target DEFAULT_BFD_VEC; | |
536 | static const bfd_target *default_bfd_vec = &DEFAULT_BFD_VEC; | |
537 | #else | |
538 | static const bfd_target *default_bfd_vec; | |
539 | #endif | |
540 | ||
b4a20239 AC |
541 | void |
542 | initialize_current_architecture (void) | |
543 | { | |
544 | const char **arches = gdbarch_printable_names (); | |
b4a20239 | 545 | |
1ba607ad AC |
546 | /* determine a default architecture and byte order. */ |
547 | struct gdbarch_info info; | |
fb6ecb0f | 548 | gdbarch_info_init (&info); |
1ba607ad AC |
549 | |
550 | /* Find a default architecture. */ | |
551 | if (info.bfd_arch_info == NULL | |
552 | && default_bfd_arch != NULL) | |
553 | info.bfd_arch_info = default_bfd_arch; | |
554 | if (info.bfd_arch_info == NULL) | |
b4a20239 | 555 | { |
1ba607ad AC |
556 | /* Choose the architecture by taking the first one |
557 | alphabetically. */ | |
558 | const char *chosen = arches[0]; | |
b4a20239 | 559 | const char **arch; |
b4a20239 AC |
560 | for (arch = arches; *arch != NULL; arch++) |
561 | { | |
b4a20239 AC |
562 | if (strcmp (*arch, chosen) < 0) |
563 | chosen = *arch; | |
564 | } | |
565 | if (chosen == NULL) | |
8e65ff28 AC |
566 | internal_error (__FILE__, __LINE__, |
567 | "initialize_current_architecture: No arch"); | |
b4a20239 AC |
568 | info.bfd_arch_info = bfd_scan_arch (chosen); |
569 | if (info.bfd_arch_info == NULL) | |
8e65ff28 AC |
570 | internal_error (__FILE__, __LINE__, |
571 | "initialize_current_architecture: Arch not found"); | |
1ba607ad AC |
572 | } |
573 | ||
afe64c1a | 574 | /* Take several guesses at a byte order. */ |
428721aa | 575 | if (info.byte_order == BFD_ENDIAN_UNKNOWN |
1ba607ad AC |
576 | && default_bfd_vec != NULL) |
577 | { | |
578 | /* Extract BFD's default vector's byte order. */ | |
579 | switch (default_bfd_vec->byteorder) | |
580 | { | |
581 | case BFD_ENDIAN_BIG: | |
d7449b42 | 582 | info.byte_order = BFD_ENDIAN_BIG; |
1ba607ad AC |
583 | break; |
584 | case BFD_ENDIAN_LITTLE: | |
778eb05e | 585 | info.byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad AC |
586 | break; |
587 | default: | |
588 | break; | |
589 | } | |
590 | } | |
428721aa | 591 | if (info.byte_order == BFD_ENDIAN_UNKNOWN) |
1ba607ad AC |
592 | { |
593 | /* look for ``*el-*'' in the target name. */ | |
594 | const char *chp; | |
595 | chp = strchr (target_name, '-'); | |
596 | if (chp != NULL | |
597 | && chp - 2 >= target_name | |
598 | && strncmp (chp - 2, "el", 2) == 0) | |
778eb05e | 599 | info.byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad | 600 | } |
428721aa | 601 | if (info.byte_order == BFD_ENDIAN_UNKNOWN) |
1ba607ad AC |
602 | { |
603 | /* Wire it to big-endian!!! */ | |
d7449b42 | 604 | info.byte_order = BFD_ENDIAN_BIG; |
1ba607ad AC |
605 | } |
606 | ||
d90cf509 AC |
607 | if (! gdbarch_update_p (info)) |
608 | internal_error (__FILE__, __LINE__, | |
609 | "initialize_current_architecture: Selection of initial architecture failed"); | |
b4a20239 | 610 | |
1ba607ad AC |
611 | /* Create the ``set architecture'' command appending ``auto'' to the |
612 | list of architectures. */ | |
b4a20239 AC |
613 | { |
614 | struct cmd_list_element *c; | |
615 | /* Append ``auto''. */ | |
616 | int nr; | |
617 | for (nr = 0; arches[nr] != NULL; nr++); | |
618 | arches = xrealloc (arches, sizeof (char*) * (nr + 2)); | |
619 | arches[nr + 0] = "auto"; | |
620 | arches[nr + 1] = NULL; | |
621 | /* FIXME: add_set_enum_cmd() uses an array of ``char *'' instead | |
622 | of ``const char *''. We just happen to know that the casts are | |
623 | safe. */ | |
624 | c = add_set_enum_cmd ("architecture", class_support, | |
53904c9e | 625 | arches, &set_architecture_string, |
b4a20239 AC |
626 | "Set architecture of target.", |
627 | &setlist); | |
9f60d481 | 628 | set_cmd_sfunc (c, set_architecture); |
b4a20239 AC |
629 | add_alias_cmd ("processor", "architecture", class_support, 1, &setlist); |
630 | /* Don't use set_from_show - need to print both auto/manual and | |
631 | current setting. */ | |
632 | add_cmd ("architecture", class_support, show_architecture, | |
633 | "Show the current target architecture", &showlist); | |
b4a20239 AC |
634 | } |
635 | } | |
636 | ||
637 | ||
fb6ecb0f AC |
638 | /* Initialize a gdbarch info to values that will be automatically |
639 | overridden. Note: Originally, this ``struct info'' was initialized | |
ce2826aa | 640 | using memset(0). Unfortunately, that ran into problems, namely |
fb6ecb0f AC |
641 | BFD_ENDIAN_BIG is zero. An explicit initialization function that |
642 | can explicitly set each field to a well defined value is used. */ | |
643 | ||
644 | void | |
645 | gdbarch_info_init (struct gdbarch_info *info) | |
646 | { | |
647 | memset (info, 0, sizeof (struct gdbarch_info)); | |
428721aa | 648 | info->byte_order = BFD_ENDIAN_UNKNOWN; |
4be87837 | 649 | info->osabi = GDB_OSABI_UNINITIALIZED; |
fb6ecb0f AC |
650 | } |
651 | ||
100bcc3f | 652 | /* Similar to init, but this time fill in the blanks. Information is |
bf922ad9 AC |
653 | obtained from the specified architecture, global "set ..." options, |
654 | and explicitly initialized INFO fields. */ | |
655 | ||
656 | void | |
657 | gdbarch_info_fill (struct gdbarch *gdbarch, struct gdbarch_info *info) | |
658 | { | |
659 | /* "(gdb) set architecture ...". */ | |
660 | if (info->bfd_arch_info == NULL | |
661 | && !target_architecture_auto | |
662 | && gdbarch != NULL) | |
663 | info->bfd_arch_info = gdbarch_bfd_arch_info (gdbarch); | |
664 | if (info->bfd_arch_info == NULL | |
665 | && info->abfd != NULL | |
666 | && bfd_get_arch (info->abfd) != bfd_arch_unknown | |
667 | && bfd_get_arch (info->abfd) != bfd_arch_obscure) | |
668 | info->bfd_arch_info = bfd_get_arch_info (info->abfd); | |
669 | if (info->bfd_arch_info == NULL | |
670 | && gdbarch != NULL) | |
671 | info->bfd_arch_info = gdbarch_bfd_arch_info (gdbarch); | |
672 | ||
673 | /* "(gdb) set byte-order ...". */ | |
674 | if (info->byte_order == BFD_ENDIAN_UNKNOWN | |
675 | && !target_byte_order_auto | |
676 | && gdbarch != NULL) | |
677 | info->byte_order = gdbarch_byte_order (gdbarch); | |
678 | /* From the INFO struct. */ | |
679 | if (info->byte_order == BFD_ENDIAN_UNKNOWN | |
680 | && info->abfd != NULL) | |
681 | info->byte_order = (bfd_big_endian (info->abfd) ? BFD_ENDIAN_BIG | |
682 | : bfd_little_endian (info->abfd) ? BFD_ENDIAN_LITTLE | |
683 | : BFD_ENDIAN_UNKNOWN); | |
684 | /* From the current target. */ | |
685 | if (info->byte_order == BFD_ENDIAN_UNKNOWN | |
686 | && gdbarch != NULL) | |
687 | info->byte_order = gdbarch_byte_order (gdbarch); | |
688 | ||
689 | /* "(gdb) set osabi ...". Handled by gdbarch_lookup_osabi. */ | |
690 | if (info->osabi == GDB_OSABI_UNINITIALIZED) | |
691 | info->osabi = gdbarch_lookup_osabi (info->abfd); | |
692 | if (info->osabi == GDB_OSABI_UNINITIALIZED | |
693 | && gdbarch != NULL) | |
694 | info->osabi = gdbarch_osabi (gdbarch); | |
695 | ||
696 | /* Must have at least filled in the architecture. */ | |
697 | gdb_assert (info->bfd_arch_info != NULL); | |
698 | } | |
699 | ||
c0e8c252 AC |
700 | /* */ |
701 | ||
a78f21af | 702 | extern initialize_file_ftype _initialize_gdbarch_utils; /* -Wmissing-prototypes */ |
c0e8c252 AC |
703 | |
704 | void | |
b4a20239 | 705 | _initialize_gdbarch_utils (void) |
c0e8c252 | 706 | { |
b4a20239 AC |
707 | struct cmd_list_element *c; |
708 | c = add_set_enum_cmd ("endian", class_support, | |
709 | endian_enum, &set_endian_string, | |
710 | "Set endianness of target.", | |
711 | &setlist); | |
9f60d481 | 712 | set_cmd_sfunc (c, set_endian); |
b4a20239 AC |
713 | /* Don't use set_from_show - need to print both auto/manual and |
714 | current setting. */ | |
715 | add_cmd ("endian", class_support, show_endian, | |
716 | "Show the current byte-order", &showlist); | |
c0e8c252 | 717 | } |