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" |
c0e8c252 AC |
26 | #include "gdbcmd.h" |
27 | #include "inferior.h" /* enum CALL_DUMMY_LOCATION et.al. */ | |
5f8a3188 | 28 | #include "gdb_string.h" |
fbec36e2 | 29 | #include "regcache.h" |
39d4ef09 | 30 | #include "gdb_assert.h" |
4182591f | 31 | #include "sim-regno.h" |
c0e8c252 | 32 | |
1ba607ad AC |
33 | #include "version.h" |
34 | ||
f0d4cc9e AC |
35 | #include "floatformat.h" |
36 | ||
049ee0e4 AC |
37 | /* Implementation of extract return value that grubs around in the |
38 | register cache. */ | |
39 | void | |
40 | legacy_extract_return_value (struct type *type, struct regcache *regcache, | |
ebba8386 | 41 | void *valbuf) |
049ee0e4 AC |
42 | { |
43 | char *registers = deprecated_grub_regcache_for_registers (regcache); | |
ebba8386 | 44 | bfd_byte *buf = valbuf; |
524d7c18 | 45 | DEPRECATED_EXTRACT_RETURN_VALUE (type, registers, buf); /* OK */ |
049ee0e4 AC |
46 | } |
47 | ||
ebba8386 AC |
48 | /* Implementation of store return value that grubs the register cache. |
49 | Takes a local copy of the buffer to avoid const problems. */ | |
50 | void | |
51 | legacy_store_return_value (struct type *type, struct regcache *regcache, | |
52 | const void *buf) | |
53 | { | |
54 | bfd_byte *b = alloca (TYPE_LENGTH (type)); | |
55 | gdb_assert (regcache == current_regcache); | |
56 | memcpy (b, buf, TYPE_LENGTH (type)); | |
57 | DEPRECATED_STORE_RETURN_VALUE (type, b); | |
58 | } | |
59 | ||
60 | ||
1fd35568 JB |
61 | int |
62 | always_use_struct_convention (int gcc_p, struct type *value_type) | |
63 | { | |
64 | return 1; | |
65 | } | |
66 | ||
67 | ||
4182591f AC |
68 | int |
69 | legacy_register_sim_regno (int regnum) | |
70 | { | |
71 | /* Only makes sense to supply raw registers. */ | |
72 | gdb_assert (regnum >= 0 && regnum < NUM_REGS); | |
73 | /* NOTE: cagney/2002-05-13: The old code did it this way and it is | |
74 | suspected that some GDB/SIM combinations may rely on this | |
75 | behavour. The default should be one2one_register_sim_regno | |
76 | (below). */ | |
77 | if (REGISTER_NAME (regnum) != NULL | |
78 | && REGISTER_NAME (regnum)[0] != '\0') | |
79 | return regnum; | |
80 | else | |
81 | return LEGACY_SIM_REGNO_IGNORE; | |
82 | } | |
83 | ||
c0e8c252 AC |
84 | int |
85 | generic_frameless_function_invocation_not (struct frame_info *fi) | |
86 | { | |
87 | return 0; | |
88 | } | |
89 | ||
71a9f22e JB |
90 | int |
91 | generic_return_value_on_stack_not (struct type *type) | |
92 | { | |
93 | return 0; | |
94 | } | |
95 | ||
bdcd319a CV |
96 | CORE_ADDR |
97 | generic_skip_trampoline_code (CORE_ADDR pc) | |
98 | { | |
99 | return 0; | |
100 | } | |
101 | ||
68e9cc94 CV |
102 | int |
103 | generic_in_solib_call_trampoline (CORE_ADDR pc, char *name) | |
104 | { | |
105 | return 0; | |
106 | } | |
107 | ||
d50355b6 MS |
108 | int |
109 | generic_in_solib_return_trampoline (CORE_ADDR pc, char *name) | |
110 | { | |
111 | return 0; | |
112 | } | |
113 | ||
c12260ac CV |
114 | int |
115 | generic_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc) | |
116 | { | |
117 | return 0; | |
118 | } | |
119 | ||
c0e8c252 AC |
120 | #if defined (CALL_DUMMY) |
121 | LONGEST legacy_call_dummy_words[] = CALL_DUMMY; | |
122 | #else | |
123 | LONGEST legacy_call_dummy_words[1]; | |
124 | #endif | |
125 | int legacy_sizeof_call_dummy_words = sizeof (legacy_call_dummy_words); | |
126 | ||
127 | void | |
f6684c31 AC |
128 | generic_remote_translate_xfer_address (struct gdbarch *gdbarch, |
129 | struct regcache *regcache, | |
130 | CORE_ADDR gdb_addr, int gdb_len, | |
c0e8c252 AC |
131 | CORE_ADDR * rem_addr, int *rem_len) |
132 | { | |
133 | *rem_addr = gdb_addr; | |
134 | *rem_len = gdb_len; | |
135 | } | |
136 | ||
dad41f9a AC |
137 | int |
138 | generic_prologue_frameless_p (CORE_ADDR ip) | |
139 | { | |
dad41f9a | 140 | return ip == SKIP_PROLOGUE (ip); |
dad41f9a AC |
141 | } |
142 | ||
2bf0cb65 EZ |
143 | /* New/multi-arched targets should use the correct gdbarch field |
144 | instead of using this global pointer. */ | |
145 | int | |
146 | legacy_print_insn (bfd_vma vma, disassemble_info *info) | |
147 | { | |
d7a27068 | 148 | return (*deprecated_tm_print_insn) (vma, info); |
2bf0cb65 | 149 | } |
dad41f9a | 150 | |
3339cf8b AC |
151 | /* Helper functions for INNER_THAN */ |
152 | ||
153 | int | |
fba45db2 | 154 | core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs) |
3339cf8b AC |
155 | { |
156 | return (lhs < rhs); | |
157 | } | |
158 | ||
159 | int | |
fba45db2 | 160 | core_addr_greaterthan (CORE_ADDR lhs, CORE_ADDR rhs) |
3339cf8b AC |
161 | { |
162 | return (lhs > rhs); | |
163 | } | |
164 | ||
165 | ||
f0d4cc9e AC |
166 | /* Helper functions for TARGET_{FLOAT,DOUBLE}_FORMAT */ |
167 | ||
168 | const struct floatformat * | |
169 | default_float_format (struct gdbarch *gdbarch) | |
170 | { | |
f0d4cc9e | 171 | int byte_order = gdbarch_byte_order (gdbarch); |
f0d4cc9e AC |
172 | switch (byte_order) |
173 | { | |
d7449b42 | 174 | case BFD_ENDIAN_BIG: |
f0d4cc9e | 175 | return &floatformat_ieee_single_big; |
778eb05e | 176 | case BFD_ENDIAN_LITTLE: |
f0d4cc9e AC |
177 | return &floatformat_ieee_single_little; |
178 | default: | |
8e65ff28 AC |
179 | internal_error (__FILE__, __LINE__, |
180 | "default_float_format: bad byte order"); | |
f0d4cc9e AC |
181 | } |
182 | } | |
183 | ||
184 | ||
185 | const struct floatformat * | |
186 | default_double_format (struct gdbarch *gdbarch) | |
187 | { | |
f0d4cc9e | 188 | int byte_order = gdbarch_byte_order (gdbarch); |
f0d4cc9e AC |
189 | switch (byte_order) |
190 | { | |
d7449b42 | 191 | case BFD_ENDIAN_BIG: |
f0d4cc9e | 192 | return &floatformat_ieee_double_big; |
778eb05e | 193 | case BFD_ENDIAN_LITTLE: |
f0d4cc9e AC |
194 | return &floatformat_ieee_double_little; |
195 | default: | |
8e65ff28 AC |
196 | internal_error (__FILE__, __LINE__, |
197 | "default_double_format: bad byte order"); | |
f0d4cc9e AC |
198 | } |
199 | } | |
200 | ||
193e3b1a AC |
201 | /* Misc helper functions for targets. */ |
202 | ||
193e3b1a | 203 | int |
781a750d | 204 | deprecated_register_convertible_not (int num) |
193e3b1a AC |
205 | { |
206 | return 0; | |
207 | } | |
208 | ||
b4a20239 | 209 | |
c8f9d51c JB |
210 | /* Under some ABI's that specify the `struct convention' for returning |
211 | structures by value, by the time we've returned from the function, | |
212 | the return value is sitting there in the caller's buffer, but GDB | |
213 | has no way to find the address of that buffer. | |
214 | ||
215 | On such architectures, use this function as your | |
216 | extract_struct_value_address method. When asked to a struct | |
217 | returned by value in this fashion, GDB will print a nice error | |
218 | message, instead of garbage. */ | |
219 | CORE_ADDR | |
220 | generic_cannot_extract_struct_value_address (char *dummy) | |
221 | { | |
222 | return 0; | |
223 | } | |
224 | ||
f517ea4e | 225 | CORE_ADDR |
875e1767 | 226 | core_addr_identity (CORE_ADDR addr) |
f517ea4e PS |
227 | { |
228 | return addr; | |
229 | } | |
230 | ||
88c72b7d AC |
231 | int |
232 | no_op_reg_to_regnum (int reg) | |
233 | { | |
234 | return reg; | |
235 | } | |
236 | ||
97f46953 | 237 | CORE_ADDR |
10312cc4 AC |
238 | init_frame_pc_noop (int fromleaf, struct frame_info *prev) |
239 | { | |
97f46953 AC |
240 | /* Do nothing, implies return the same PC value. */ |
241 | return get_frame_pc (prev); | |
10312cc4 AC |
242 | } |
243 | ||
97f46953 | 244 | CORE_ADDR |
7824d2f2 AC |
245 | init_frame_pc_default (int fromleaf, struct frame_info *prev) |
246 | { | |
6913c89a AC |
247 | if (fromleaf && DEPRECATED_SAVED_PC_AFTER_CALL_P ()) |
248 | return DEPRECATED_SAVED_PC_AFTER_CALL (get_next_frame (prev)); | |
75e3c1f9 | 249 | else if (get_next_frame (prev) != NULL) |
8bedc050 | 250 | return DEPRECATED_FRAME_SAVED_PC (get_next_frame (prev)); |
7824d2f2 | 251 | else |
97f46953 | 252 | return read_pc (); |
7824d2f2 AC |
253 | } |
254 | ||
a2cf933a EZ |
255 | void |
256 | default_elf_make_msymbol_special (asymbol *sym, struct minimal_symbol *msym) | |
257 | { | |
258 | return; | |
259 | } | |
260 | ||
261 | void | |
262 | default_coff_make_msymbol_special (int val, struct minimal_symbol *msym) | |
263 | { | |
264 | return; | |
265 | } | |
266 | ||
01fb7433 AC |
267 | int |
268 | cannot_register_not (int regnum) | |
269 | { | |
270 | return 0; | |
271 | } | |
39d4ef09 AC |
272 | |
273 | /* Legacy version of target_virtual_frame_pointer(). Assumes that | |
0ba6dca9 AC |
274 | there is an DEPRECATED_FP_REGNUM and that it is the same, cooked or |
275 | raw. */ | |
39d4ef09 AC |
276 | |
277 | void | |
278 | legacy_virtual_frame_pointer (CORE_ADDR pc, | |
279 | int *frame_regnum, | |
280 | LONGEST *frame_offset) | |
281 | { | |
20bcf01c AC |
282 | /* FIXME: cagney/2002-09-13: This code is used when identifying the |
283 | frame pointer of the current PC. It is assuming that a single | |
284 | register and an offset can determine this. I think it should | |
285 | instead generate a byte code expression as that would work better | |
286 | with things like Dwarf2's CFI. */ | |
0ba6dca9 AC |
287 | if (DEPRECATED_FP_REGNUM >= 0 && DEPRECATED_FP_REGNUM < NUM_REGS) |
288 | *frame_regnum = DEPRECATED_FP_REGNUM; | |
20bcf01c AC |
289 | else if (SP_REGNUM >= 0 && SP_REGNUM < NUM_REGS) |
290 | *frame_regnum = SP_REGNUM; | |
291 | else | |
292 | /* Should this be an internal error? I guess so, it is reflecting | |
293 | an architectural limitation in the current design. */ | |
294 | internal_error (__FILE__, __LINE__, "No virtual frame pointer available"); | |
39d4ef09 AC |
295 | *frame_offset = 0; |
296 | } | |
46cd78fb | 297 | |
b2e75d78 AC |
298 | /* Assume the world is sane, every register's virtual and real size |
299 | is identical. */ | |
46cd78fb AC |
300 | |
301 | int | |
b2e75d78 | 302 | generic_register_size (int regnum) |
46cd78fb AC |
303 | { |
304 | gdb_assert (regnum >= 0 && regnum < NUM_REGS + NUM_PSEUDO_REGS); | |
35cac7cf AC |
305 | if (gdbarch_register_type_p (current_gdbarch)) |
306 | return TYPE_LENGTH (gdbarch_register_type (current_gdbarch, regnum)); | |
307 | else | |
308 | /* FIXME: cagney/2003-03-01: Once all architectures implement | |
309 | gdbarch_register_type(), this entire function can go away. It | |
310 | is made obsolete by register_size(). */ | |
311 | return TYPE_LENGTH (REGISTER_VIRTUAL_TYPE (regnum)); /* OK */ | |
ce29138a MS |
312 | } |
313 | ||
a7e3c2ad AC |
314 | /* Assume all registers are adjacent. */ |
315 | ||
316 | int | |
317 | generic_register_byte (int regnum) | |
318 | { | |
319 | int byte; | |
320 | int i; | |
321 | gdb_assert (regnum >= 0 && regnum < NUM_REGS + NUM_PSEUDO_REGS); | |
322 | byte = 0; | |
323 | for (i = 0; i < regnum; i++) | |
324 | { | |
0aa7e1aa | 325 | byte += generic_register_size (i); |
a7e3c2ad AC |
326 | } |
327 | return byte; | |
328 | } | |
329 | ||
d7bd68ca AC |
330 | \f |
331 | int | |
332 | legacy_pc_in_sigtramp (CORE_ADDR pc, char *name) | |
333 | { | |
db54fef4 CV |
334 | #if !defined (IN_SIGTRAMP) |
335 | if (SIGTRAMP_START_P ()) | |
336 | return (pc) >= SIGTRAMP_START (pc) && (pc) < SIGTRAMP_END (pc); | |
337 | else | |
338 | return name && strcmp ("_sigtramp", name) == 0; | |
339 | #else | |
340 | return IN_SIGTRAMP (pc, name); | |
341 | #endif | |
d7bd68ca AC |
342 | } |
343 | ||
13d01224 | 344 | int |
ff2e87ac | 345 | legacy_convert_register_p (int regnum, struct type *type) |
13d01224 | 346 | { |
781a750d | 347 | return DEPRECATED_REGISTER_CONVERTIBLE (regnum); |
13d01224 AC |
348 | } |
349 | ||
350 | void | |
ff2e87ac AC |
351 | legacy_register_to_value (struct frame_info *frame, int regnum, |
352 | struct type *type, void *to) | |
13d01224 | 353 | { |
ff2e87ac AC |
354 | char from[MAX_REGISTER_SIZE]; |
355 | frame_read_register (frame, regnum, from); | |
781a750d | 356 | DEPRECATED_REGISTER_CONVERT_TO_VIRTUAL (regnum, type, from, to); |
13d01224 AC |
357 | } |
358 | ||
359 | void | |
ff2e87ac AC |
360 | legacy_value_to_register (struct frame_info *frame, int regnum, |
361 | struct type *type, const void *tmp) | |
13d01224 | 362 | { |
ff2e87ac AC |
363 | char to[MAX_REGISTER_SIZE]; |
364 | char *from = alloca (TYPE_LENGTH (type)); | |
365 | memcpy (from, from, TYPE_LENGTH (type)); | |
781a750d | 366 | DEPRECATED_REGISTER_CONVERT_TO_RAW (type, regnum, from, to); |
ff2e87ac | 367 | put_frame_register (frame, regnum, to); |
13d01224 AC |
368 | } |
369 | ||
01fb7433 | 370 | \f |
b4a20239 AC |
371 | /* Functions to manipulate the endianness of the target. */ |
372 | ||
1ba607ad | 373 | /* ``target_byte_order'' is only used when non- multi-arch. |
afe64c1a AC |
374 | Multi-arch targets obtain the current byte order using the |
375 | TARGET_BYTE_ORDER gdbarch method. | |
376 | ||
377 | The choice of initial value is entirely arbitrary. During startup, | |
378 | the function initialize_current_architecture() updates this value | |
379 | based on default byte-order information extracted from BFD. */ | |
380 | int target_byte_order = BFD_ENDIAN_BIG; | |
b4a20239 AC |
381 | int target_byte_order_auto = 1; |
382 | ||
53904c9e AC |
383 | static const char endian_big[] = "big"; |
384 | static const char endian_little[] = "little"; | |
385 | static const char endian_auto[] = "auto"; | |
386 | static const char *endian_enum[] = | |
b4a20239 AC |
387 | { |
388 | endian_big, | |
389 | endian_little, | |
390 | endian_auto, | |
391 | NULL, | |
392 | }; | |
53904c9e | 393 | static const char *set_endian_string; |
b4a20239 AC |
394 | |
395 | /* Called by ``show endian''. */ | |
396 | ||
397 | static void | |
398 | show_endian (char *args, int from_tty) | |
399 | { | |
400 | if (TARGET_BYTE_ORDER_AUTO) | |
401 | printf_unfiltered ("The target endianness is set automatically (currently %s endian)\n", | |
d7449b42 | 402 | (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little")); |
b4a20239 AC |
403 | else |
404 | printf_unfiltered ("The target is assumed to be %s endian\n", | |
d7449b42 | 405 | (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little")); |
b4a20239 AC |
406 | } |
407 | ||
408 | static void | |
409 | set_endian (char *ignore_args, int from_tty, struct cmd_list_element *c) | |
410 | { | |
3fd3d7d2 | 411 | if (set_endian_string == endian_auto) |
b4a20239 AC |
412 | { |
413 | target_byte_order_auto = 1; | |
414 | } | |
415 | else if (set_endian_string == endian_little) | |
416 | { | |
d90cf509 | 417 | struct gdbarch_info info; |
b4a20239 | 418 | target_byte_order_auto = 0; |
d90cf509 AC |
419 | gdbarch_info_init (&info); |
420 | info.byte_order = BFD_ENDIAN_LITTLE; | |
421 | if (! gdbarch_update_p (info)) | |
422 | printf_unfiltered ("Little endian target not supported by GDB\n"); | |
b4a20239 AC |
423 | } |
424 | else if (set_endian_string == endian_big) | |
425 | { | |
d90cf509 | 426 | struct gdbarch_info info; |
b4a20239 | 427 | target_byte_order_auto = 0; |
d90cf509 AC |
428 | gdbarch_info_init (&info); |
429 | info.byte_order = BFD_ENDIAN_BIG; | |
430 | if (! gdbarch_update_p (info)) | |
431 | printf_unfiltered ("Big endian target not supported by GDB\n"); | |
b4a20239 AC |
432 | } |
433 | else | |
8e65ff28 AC |
434 | internal_error (__FILE__, __LINE__, |
435 | "set_endian: bad value"); | |
b4a20239 AC |
436 | show_endian (NULL, from_tty); |
437 | } | |
438 | ||
b4a20239 AC |
439 | /* Functions to manipulate the architecture of the target */ |
440 | ||
441 | enum set_arch { set_arch_auto, set_arch_manual }; | |
442 | ||
443 | int target_architecture_auto = 1; | |
444 | ||
53904c9e | 445 | const char *set_architecture_string; |
b4a20239 | 446 | |
b4a20239 AC |
447 | /* Called if the user enters ``show architecture'' without an |
448 | argument. */ | |
449 | ||
450 | static void | |
451 | show_architecture (char *args, int from_tty) | |
452 | { | |
453 | const char *arch; | |
454 | arch = TARGET_ARCHITECTURE->printable_name; | |
455 | if (target_architecture_auto) | |
456 | printf_filtered ("The target architecture is set automatically (currently %s)\n", arch); | |
457 | else | |
458 | printf_filtered ("The target architecture is assumed to be %s\n", arch); | |
459 | } | |
460 | ||
461 | ||
462 | /* Called if the user enters ``set architecture'' with or without an | |
463 | argument. */ | |
464 | ||
465 | static void | |
466 | set_architecture (char *ignore_args, int from_tty, struct cmd_list_element *c) | |
467 | { | |
468 | if (strcmp (set_architecture_string, "auto") == 0) | |
469 | { | |
470 | target_architecture_auto = 1; | |
471 | } | |
d90cf509 | 472 | else |
b4a20239 AC |
473 | { |
474 | struct gdbarch_info info; | |
fb6ecb0f | 475 | gdbarch_info_init (&info); |
b4a20239 AC |
476 | info.bfd_arch_info = bfd_scan_arch (set_architecture_string); |
477 | if (info.bfd_arch_info == NULL) | |
8e65ff28 AC |
478 | internal_error (__FILE__, __LINE__, |
479 | "set_architecture: bfd_scan_arch failed"); | |
16f33e29 | 480 | if (gdbarch_update_p (info)) |
b4a20239 AC |
481 | target_architecture_auto = 0; |
482 | else | |
ec3d358c | 483 | printf_unfiltered ("Architecture `%s' not recognized.\n", |
b4a20239 AC |
484 | set_architecture_string); |
485 | } | |
b4a20239 AC |
486 | show_architecture (NULL, from_tty); |
487 | } | |
488 | ||
b7d6b182 | 489 | /* Set the dynamic target-system-dependent parameters (architecture, |
b4a20239 AC |
490 | byte-order) using information found in the BFD */ |
491 | ||
492 | void | |
fba45db2 | 493 | set_gdbarch_from_file (bfd *abfd) |
b4a20239 | 494 | { |
d90cf509 AC |
495 | struct gdbarch_info info; |
496 | gdbarch_info_init (&info); | |
497 | info.abfd = abfd; | |
498 | if (! gdbarch_update_p (info)) | |
499 | error ("Architecture of file not recognized.\n"); | |
b4a20239 AC |
500 | } |
501 | ||
502 | /* Initialize the current architecture. Update the ``set | |
503 | architecture'' command so that it specifies a list of valid | |
504 | architectures. */ | |
505 | ||
1ba607ad AC |
506 | #ifdef DEFAULT_BFD_ARCH |
507 | extern const bfd_arch_info_type DEFAULT_BFD_ARCH; | |
508 | static const bfd_arch_info_type *default_bfd_arch = &DEFAULT_BFD_ARCH; | |
509 | #else | |
4b9b3959 | 510 | static const bfd_arch_info_type *default_bfd_arch; |
1ba607ad AC |
511 | #endif |
512 | ||
513 | #ifdef DEFAULT_BFD_VEC | |
514 | extern const bfd_target DEFAULT_BFD_VEC; | |
515 | static const bfd_target *default_bfd_vec = &DEFAULT_BFD_VEC; | |
516 | #else | |
517 | static const bfd_target *default_bfd_vec; | |
518 | #endif | |
519 | ||
b4a20239 AC |
520 | void |
521 | initialize_current_architecture (void) | |
522 | { | |
523 | const char **arches = gdbarch_printable_names (); | |
b4a20239 | 524 | |
1ba607ad AC |
525 | /* determine a default architecture and byte order. */ |
526 | struct gdbarch_info info; | |
fb6ecb0f | 527 | gdbarch_info_init (&info); |
1ba607ad AC |
528 | |
529 | /* Find a default architecture. */ | |
530 | if (info.bfd_arch_info == NULL | |
531 | && default_bfd_arch != NULL) | |
532 | info.bfd_arch_info = default_bfd_arch; | |
533 | if (info.bfd_arch_info == NULL) | |
b4a20239 | 534 | { |
1ba607ad AC |
535 | /* Choose the architecture by taking the first one |
536 | alphabetically. */ | |
537 | const char *chosen = arches[0]; | |
b4a20239 | 538 | const char **arch; |
b4a20239 AC |
539 | for (arch = arches; *arch != NULL; arch++) |
540 | { | |
b4a20239 AC |
541 | if (strcmp (*arch, chosen) < 0) |
542 | chosen = *arch; | |
543 | } | |
544 | if (chosen == NULL) | |
8e65ff28 AC |
545 | internal_error (__FILE__, __LINE__, |
546 | "initialize_current_architecture: No arch"); | |
b4a20239 AC |
547 | info.bfd_arch_info = bfd_scan_arch (chosen); |
548 | if (info.bfd_arch_info == NULL) | |
8e65ff28 AC |
549 | internal_error (__FILE__, __LINE__, |
550 | "initialize_current_architecture: Arch not found"); | |
1ba607ad AC |
551 | } |
552 | ||
afe64c1a | 553 | /* Take several guesses at a byte order. */ |
428721aa | 554 | if (info.byte_order == BFD_ENDIAN_UNKNOWN |
1ba607ad AC |
555 | && default_bfd_vec != NULL) |
556 | { | |
557 | /* Extract BFD's default vector's byte order. */ | |
558 | switch (default_bfd_vec->byteorder) | |
559 | { | |
560 | case BFD_ENDIAN_BIG: | |
d7449b42 | 561 | info.byte_order = BFD_ENDIAN_BIG; |
1ba607ad AC |
562 | break; |
563 | case BFD_ENDIAN_LITTLE: | |
778eb05e | 564 | info.byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad AC |
565 | break; |
566 | default: | |
567 | break; | |
568 | } | |
569 | } | |
428721aa | 570 | if (info.byte_order == BFD_ENDIAN_UNKNOWN) |
1ba607ad AC |
571 | { |
572 | /* look for ``*el-*'' in the target name. */ | |
573 | const char *chp; | |
574 | chp = strchr (target_name, '-'); | |
575 | if (chp != NULL | |
576 | && chp - 2 >= target_name | |
577 | && strncmp (chp - 2, "el", 2) == 0) | |
778eb05e | 578 | info.byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad | 579 | } |
428721aa | 580 | if (info.byte_order == BFD_ENDIAN_UNKNOWN) |
1ba607ad AC |
581 | { |
582 | /* Wire it to big-endian!!! */ | |
d7449b42 | 583 | info.byte_order = BFD_ENDIAN_BIG; |
1ba607ad AC |
584 | } |
585 | ||
d90cf509 AC |
586 | if (! gdbarch_update_p (info)) |
587 | internal_error (__FILE__, __LINE__, | |
588 | "initialize_current_architecture: Selection of initial architecture failed"); | |
b4a20239 | 589 | |
1ba607ad AC |
590 | /* Create the ``set architecture'' command appending ``auto'' to the |
591 | list of architectures. */ | |
b4a20239 AC |
592 | { |
593 | struct cmd_list_element *c; | |
594 | /* Append ``auto''. */ | |
595 | int nr; | |
596 | for (nr = 0; arches[nr] != NULL; nr++); | |
597 | arches = xrealloc (arches, sizeof (char*) * (nr + 2)); | |
598 | arches[nr + 0] = "auto"; | |
599 | arches[nr + 1] = NULL; | |
600 | /* FIXME: add_set_enum_cmd() uses an array of ``char *'' instead | |
601 | of ``const char *''. We just happen to know that the casts are | |
602 | safe. */ | |
603 | c = add_set_enum_cmd ("architecture", class_support, | |
53904c9e | 604 | arches, &set_architecture_string, |
b4a20239 AC |
605 | "Set architecture of target.", |
606 | &setlist); | |
9f60d481 | 607 | set_cmd_sfunc (c, set_architecture); |
b4a20239 AC |
608 | add_alias_cmd ("processor", "architecture", class_support, 1, &setlist); |
609 | /* Don't use set_from_show - need to print both auto/manual and | |
610 | current setting. */ | |
611 | add_cmd ("architecture", class_support, show_architecture, | |
612 | "Show the current target architecture", &showlist); | |
b4a20239 AC |
613 | } |
614 | } | |
615 | ||
616 | ||
fb6ecb0f AC |
617 | /* Initialize a gdbarch info to values that will be automatically |
618 | overridden. Note: Originally, this ``struct info'' was initialized | |
619 | using memset(0). Unfortunatly, that ran into problems, namely | |
620 | BFD_ENDIAN_BIG is zero. An explicit initialization function that | |
621 | can explicitly set each field to a well defined value is used. */ | |
622 | ||
623 | void | |
624 | gdbarch_info_init (struct gdbarch_info *info) | |
625 | { | |
626 | memset (info, 0, sizeof (struct gdbarch_info)); | |
428721aa | 627 | info->byte_order = BFD_ENDIAN_UNKNOWN; |
4be87837 | 628 | info->osabi = GDB_OSABI_UNINITIALIZED; |
fb6ecb0f AC |
629 | } |
630 | ||
c0e8c252 AC |
631 | /* */ |
632 | ||
a78f21af | 633 | extern initialize_file_ftype _initialize_gdbarch_utils; /* -Wmissing-prototypes */ |
c0e8c252 AC |
634 | |
635 | void | |
b4a20239 | 636 | _initialize_gdbarch_utils (void) |
c0e8c252 | 637 | { |
b4a20239 AC |
638 | struct cmd_list_element *c; |
639 | c = add_set_enum_cmd ("endian", class_support, | |
640 | endian_enum, &set_endian_string, | |
641 | "Set endianness of target.", | |
642 | &setlist); | |
9f60d481 | 643 | set_cmd_sfunc (c, set_endian); |
b4a20239 AC |
644 | /* Don't use set_from_show - need to print both auto/manual and |
645 | current setting. */ | |
646 | add_cmd ("endian", class_support, show_endian, | |
647 | "Show the current byte-order", &showlist); | |
c0e8c252 | 648 | } |