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 | |
1ba607ad AC |
34 | #include "version.h" |
35 | ||
f0d4cc9e AC |
36 | #include "floatformat.h" |
37 | ||
049ee0e4 AC |
38 | /* Implementation of extract return value that grubs around in the |
39 | register cache. */ | |
40 | void | |
41 | legacy_extract_return_value (struct type *type, struct regcache *regcache, | |
ebba8386 | 42 | void *valbuf) |
049ee0e4 AC |
43 | { |
44 | char *registers = deprecated_grub_regcache_for_registers (regcache); | |
ebba8386 | 45 | bfd_byte *buf = valbuf; |
524d7c18 | 46 | DEPRECATED_EXTRACT_RETURN_VALUE (type, registers, buf); /* OK */ |
049ee0e4 AC |
47 | } |
48 | ||
ebba8386 AC |
49 | /* Implementation of store return value that grubs the register cache. |
50 | Takes a local copy of the buffer to avoid const problems. */ | |
51 | void | |
52 | legacy_store_return_value (struct type *type, struct regcache *regcache, | |
53 | const void *buf) | |
54 | { | |
55 | bfd_byte *b = alloca (TYPE_LENGTH (type)); | |
56 | gdb_assert (regcache == current_regcache); | |
57 | memcpy (b, buf, TYPE_LENGTH (type)); | |
58 | DEPRECATED_STORE_RETURN_VALUE (type, b); | |
59 | } | |
60 | ||
61 | ||
1fd35568 JB |
62 | int |
63 | always_use_struct_convention (int gcc_p, struct type *value_type) | |
64 | { | |
65 | return 1; | |
66 | } | |
67 | ||
68 | ||
4182591f AC |
69 | int |
70 | legacy_register_sim_regno (int regnum) | |
71 | { | |
72 | /* Only makes sense to supply raw registers. */ | |
73 | gdb_assert (regnum >= 0 && regnum < NUM_REGS); | |
74 | /* NOTE: cagney/2002-05-13: The old code did it this way and it is | |
75 | suspected that some GDB/SIM combinations may rely on this | |
76 | behavour. The default should be one2one_register_sim_regno | |
77 | (below). */ | |
78 | if (REGISTER_NAME (regnum) != NULL | |
79 | && REGISTER_NAME (regnum)[0] != '\0') | |
80 | return regnum; | |
81 | else | |
82 | return LEGACY_SIM_REGNO_IGNORE; | |
83 | } | |
84 | ||
c0e8c252 AC |
85 | int |
86 | generic_frameless_function_invocation_not (struct frame_info *fi) | |
87 | { | |
88 | return 0; | |
89 | } | |
90 | ||
71a9f22e JB |
91 | int |
92 | generic_return_value_on_stack_not (struct type *type) | |
93 | { | |
94 | return 0; | |
95 | } | |
96 | ||
bdcd319a CV |
97 | CORE_ADDR |
98 | generic_skip_trampoline_code (CORE_ADDR pc) | |
99 | { | |
100 | return 0; | |
101 | } | |
102 | ||
68e9cc94 CV |
103 | int |
104 | generic_in_solib_call_trampoline (CORE_ADDR pc, char *name) | |
105 | { | |
106 | return 0; | |
107 | } | |
108 | ||
d50355b6 MS |
109 | int |
110 | generic_in_solib_return_trampoline (CORE_ADDR pc, char *name) | |
111 | { | |
112 | return 0; | |
113 | } | |
114 | ||
c12260ac CV |
115 | int |
116 | generic_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc) | |
117 | { | |
118 | return 0; | |
119 | } | |
120 | ||
c0e8c252 AC |
121 | #if defined (CALL_DUMMY) |
122 | LONGEST legacy_call_dummy_words[] = CALL_DUMMY; | |
123 | #else | |
124 | LONGEST legacy_call_dummy_words[1]; | |
125 | #endif | |
126 | int legacy_sizeof_call_dummy_words = sizeof (legacy_call_dummy_words); | |
127 | ||
128 | void | |
f6684c31 AC |
129 | generic_remote_translate_xfer_address (struct gdbarch *gdbarch, |
130 | struct regcache *regcache, | |
131 | CORE_ADDR gdb_addr, int gdb_len, | |
c0e8c252 AC |
132 | CORE_ADDR * rem_addr, int *rem_len) |
133 | { | |
134 | *rem_addr = gdb_addr; | |
135 | *rem_len = gdb_len; | |
136 | } | |
137 | ||
dad41f9a AC |
138 | int |
139 | generic_prologue_frameless_p (CORE_ADDR ip) | |
140 | { | |
dad41f9a | 141 | return ip == SKIP_PROLOGUE (ip); |
dad41f9a AC |
142 | } |
143 | ||
3339cf8b AC |
144 | /* Helper functions for INNER_THAN */ |
145 | ||
146 | int | |
fba45db2 | 147 | core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs) |
3339cf8b AC |
148 | { |
149 | return (lhs < rhs); | |
150 | } | |
151 | ||
152 | int | |
fba45db2 | 153 | core_addr_greaterthan (CORE_ADDR lhs, CORE_ADDR rhs) |
3339cf8b AC |
154 | { |
155 | return (lhs > rhs); | |
156 | } | |
157 | ||
158 | ||
f0d4cc9e AC |
159 | /* Helper functions for TARGET_{FLOAT,DOUBLE}_FORMAT */ |
160 | ||
161 | const struct floatformat * | |
162 | default_float_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_single_big; |
778eb05e | 169 | case BFD_ENDIAN_LITTLE: |
f0d4cc9e AC |
170 | return &floatformat_ieee_single_little; |
171 | default: | |
8e65ff28 AC |
172 | internal_error (__FILE__, __LINE__, |
173 | "default_float_format: bad byte order"); | |
f0d4cc9e AC |
174 | } |
175 | } | |
176 | ||
177 | ||
178 | const struct floatformat * | |
179 | default_double_format (struct gdbarch *gdbarch) | |
180 | { | |
f0d4cc9e | 181 | int byte_order = gdbarch_byte_order (gdbarch); |
f0d4cc9e AC |
182 | switch (byte_order) |
183 | { | |
d7449b42 | 184 | case BFD_ENDIAN_BIG: |
f0d4cc9e | 185 | return &floatformat_ieee_double_big; |
778eb05e | 186 | case BFD_ENDIAN_LITTLE: |
f0d4cc9e AC |
187 | return &floatformat_ieee_double_little; |
188 | default: | |
8e65ff28 AC |
189 | internal_error (__FILE__, __LINE__, |
190 | "default_double_format: bad byte order"); | |
f0d4cc9e AC |
191 | } |
192 | } | |
193 | ||
193e3b1a AC |
194 | /* Misc helper functions for targets. */ |
195 | ||
193e3b1a | 196 | int |
781a750d | 197 | deprecated_register_convertible_not (int num) |
193e3b1a AC |
198 | { |
199 | return 0; | |
200 | } | |
201 | ||
b4a20239 | 202 | |
f517ea4e | 203 | CORE_ADDR |
875e1767 | 204 | core_addr_identity (CORE_ADDR addr) |
f517ea4e PS |
205 | { |
206 | return addr; | |
207 | } | |
208 | ||
e2d0e7eb AC |
209 | CORE_ADDR |
210 | convert_from_func_ptr_addr_identity (struct gdbarch *gdbarch, CORE_ADDR addr, | |
211 | struct target_ops *targ) | |
212 | { | |
213 | return addr; | |
214 | } | |
215 | ||
88c72b7d AC |
216 | int |
217 | no_op_reg_to_regnum (int reg) | |
218 | { | |
219 | return reg; | |
220 | } | |
221 | ||
97f46953 | 222 | CORE_ADDR |
0968aa8c | 223 | deprecated_init_frame_pc_default (int fromleaf, struct frame_info *prev) |
7824d2f2 | 224 | { |
6913c89a AC |
225 | if (fromleaf && DEPRECATED_SAVED_PC_AFTER_CALL_P ()) |
226 | return DEPRECATED_SAVED_PC_AFTER_CALL (get_next_frame (prev)); | |
75e3c1f9 | 227 | else if (get_next_frame (prev) != NULL) |
8bedc050 | 228 | return DEPRECATED_FRAME_SAVED_PC (get_next_frame (prev)); |
7824d2f2 | 229 | else |
97f46953 | 230 | return read_pc (); |
7824d2f2 AC |
231 | } |
232 | ||
a2cf933a EZ |
233 | void |
234 | default_elf_make_msymbol_special (asymbol *sym, struct minimal_symbol *msym) | |
235 | { | |
236 | return; | |
237 | } | |
238 | ||
239 | void | |
240 | default_coff_make_msymbol_special (int val, struct minimal_symbol *msym) | |
241 | { | |
242 | return; | |
243 | } | |
244 | ||
01fb7433 AC |
245 | int |
246 | cannot_register_not (int regnum) | |
247 | { | |
248 | return 0; | |
249 | } | |
39d4ef09 AC |
250 | |
251 | /* Legacy version of target_virtual_frame_pointer(). Assumes that | |
0ba6dca9 AC |
252 | there is an DEPRECATED_FP_REGNUM and that it is the same, cooked or |
253 | raw. */ | |
39d4ef09 AC |
254 | |
255 | void | |
256 | legacy_virtual_frame_pointer (CORE_ADDR pc, | |
257 | int *frame_regnum, | |
258 | LONGEST *frame_offset) | |
259 | { | |
20bcf01c AC |
260 | /* FIXME: cagney/2002-09-13: This code is used when identifying the |
261 | frame pointer of the current PC. It is assuming that a single | |
262 | register and an offset can determine this. I think it should | |
263 | instead generate a byte code expression as that would work better | |
264 | with things like Dwarf2's CFI. */ | |
0ba6dca9 AC |
265 | if (DEPRECATED_FP_REGNUM >= 0 && DEPRECATED_FP_REGNUM < NUM_REGS) |
266 | *frame_regnum = DEPRECATED_FP_REGNUM; | |
20bcf01c AC |
267 | else if (SP_REGNUM >= 0 && SP_REGNUM < NUM_REGS) |
268 | *frame_regnum = SP_REGNUM; | |
269 | else | |
270 | /* Should this be an internal error? I guess so, it is reflecting | |
271 | an architectural limitation in the current design. */ | |
272 | internal_error (__FILE__, __LINE__, "No virtual frame pointer available"); | |
39d4ef09 AC |
273 | *frame_offset = 0; |
274 | } | |
46cd78fb | 275 | |
b2e75d78 AC |
276 | /* Assume the world is sane, every register's virtual and real size |
277 | is identical. */ | |
46cd78fb AC |
278 | |
279 | int | |
b2e75d78 | 280 | generic_register_size (int regnum) |
46cd78fb AC |
281 | { |
282 | gdb_assert (regnum >= 0 && regnum < NUM_REGS + NUM_PSEUDO_REGS); | |
35cac7cf AC |
283 | if (gdbarch_register_type_p (current_gdbarch)) |
284 | return TYPE_LENGTH (gdbarch_register_type (current_gdbarch, regnum)); | |
285 | else | |
286 | /* FIXME: cagney/2003-03-01: Once all architectures implement | |
287 | gdbarch_register_type(), this entire function can go away. It | |
288 | is made obsolete by register_size(). */ | |
2e092625 | 289 | return TYPE_LENGTH (DEPRECATED_REGISTER_VIRTUAL_TYPE (regnum)); /* OK */ |
ce29138a MS |
290 | } |
291 | ||
a7e3c2ad AC |
292 | /* Assume all registers are adjacent. */ |
293 | ||
294 | int | |
295 | generic_register_byte (int regnum) | |
296 | { | |
297 | int byte; | |
298 | int i; | |
299 | gdb_assert (regnum >= 0 && regnum < NUM_REGS + NUM_PSEUDO_REGS); | |
300 | byte = 0; | |
301 | for (i = 0; i < regnum; i++) | |
302 | { | |
0aa7e1aa | 303 | byte += generic_register_size (i); |
a7e3c2ad AC |
304 | } |
305 | return byte; | |
306 | } | |
307 | ||
d7bd68ca AC |
308 | \f |
309 | int | |
310 | legacy_pc_in_sigtramp (CORE_ADDR pc, char *name) | |
311 | { | |
db54fef4 CV |
312 | #if !defined (IN_SIGTRAMP) |
313 | if (SIGTRAMP_START_P ()) | |
314 | return (pc) >= SIGTRAMP_START (pc) && (pc) < SIGTRAMP_END (pc); | |
315 | else | |
316 | return name && strcmp ("_sigtramp", name) == 0; | |
317 | #else | |
318 | return IN_SIGTRAMP (pc, name); | |
319 | #endif | |
d7bd68ca AC |
320 | } |
321 | ||
13d01224 | 322 | int |
ff2e87ac | 323 | legacy_convert_register_p (int regnum, struct type *type) |
13d01224 | 324 | { |
781a750d | 325 | return DEPRECATED_REGISTER_CONVERTIBLE (regnum); |
13d01224 AC |
326 | } |
327 | ||
328 | void | |
ff2e87ac AC |
329 | legacy_register_to_value (struct frame_info *frame, int regnum, |
330 | struct type *type, void *to) | |
13d01224 | 331 | { |
ff2e87ac | 332 | char from[MAX_REGISTER_SIZE]; |
7f5f525d | 333 | get_frame_register (frame, regnum, from); |
781a750d | 334 | DEPRECATED_REGISTER_CONVERT_TO_VIRTUAL (regnum, type, from, to); |
13d01224 AC |
335 | } |
336 | ||
337 | void | |
ff2e87ac AC |
338 | legacy_value_to_register (struct frame_info *frame, int regnum, |
339 | struct type *type, const void *tmp) | |
13d01224 | 340 | { |
ff2e87ac AC |
341 | char to[MAX_REGISTER_SIZE]; |
342 | char *from = alloca (TYPE_LENGTH (type)); | |
343 | memcpy (from, from, TYPE_LENGTH (type)); | |
781a750d | 344 | DEPRECATED_REGISTER_CONVERT_TO_RAW (type, regnum, from, to); |
ff2e87ac | 345 | put_frame_register (frame, regnum, to); |
13d01224 AC |
346 | } |
347 | ||
192cb3d4 MK |
348 | int |
349 | default_stabs_argument_has_addr (struct gdbarch *gdbarch, struct type *type) | |
350 | { | |
351 | if (DEPRECATED_REG_STRUCT_HAS_ADDR_P () | |
352 | && DEPRECATED_REG_STRUCT_HAS_ADDR (processing_gcc_compilation, type)) | |
353 | { | |
354 | CHECK_TYPEDEF (type); | |
355 | ||
356 | return (TYPE_CODE (type) == TYPE_CODE_STRUCT | |
357 | || TYPE_CODE (type) == TYPE_CODE_UNION | |
358 | || TYPE_CODE (type) == TYPE_CODE_SET | |
359 | || TYPE_CODE (type) == TYPE_CODE_BITSTRING); | |
360 | } | |
361 | ||
362 | return 0; | |
363 | } | |
364 | ||
01fb7433 | 365 | \f |
b4a20239 AC |
366 | /* Functions to manipulate the endianness of the target. */ |
367 | ||
1ba607ad | 368 | /* ``target_byte_order'' is only used when non- multi-arch. |
afe64c1a AC |
369 | Multi-arch targets obtain the current byte order using the |
370 | TARGET_BYTE_ORDER gdbarch method. | |
371 | ||
372 | The choice of initial value is entirely arbitrary. During startup, | |
373 | the function initialize_current_architecture() updates this value | |
374 | based on default byte-order information extracted from BFD. */ | |
375 | int target_byte_order = BFD_ENDIAN_BIG; | |
b4a20239 AC |
376 | int target_byte_order_auto = 1; |
377 | ||
53904c9e AC |
378 | static const char endian_big[] = "big"; |
379 | static const char endian_little[] = "little"; | |
380 | static const char endian_auto[] = "auto"; | |
381 | static const char *endian_enum[] = | |
b4a20239 AC |
382 | { |
383 | endian_big, | |
384 | endian_little, | |
385 | endian_auto, | |
386 | NULL, | |
387 | }; | |
53904c9e | 388 | static const char *set_endian_string; |
b4a20239 AC |
389 | |
390 | /* Called by ``show endian''. */ | |
391 | ||
392 | static void | |
393 | show_endian (char *args, int from_tty) | |
394 | { | |
395 | if (TARGET_BYTE_ORDER_AUTO) | |
396 | printf_unfiltered ("The target endianness is set automatically (currently %s endian)\n", | |
d7449b42 | 397 | (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little")); |
b4a20239 AC |
398 | else |
399 | printf_unfiltered ("The target is assumed to be %s endian\n", | |
d7449b42 | 400 | (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little")); |
b4a20239 AC |
401 | } |
402 | ||
403 | static void | |
404 | set_endian (char *ignore_args, int from_tty, struct cmd_list_element *c) | |
405 | { | |
3fd3d7d2 | 406 | if (set_endian_string == endian_auto) |
b4a20239 AC |
407 | { |
408 | target_byte_order_auto = 1; | |
409 | } | |
410 | else if (set_endian_string == endian_little) | |
411 | { | |
d90cf509 | 412 | struct gdbarch_info info; |
b4a20239 | 413 | target_byte_order_auto = 0; |
d90cf509 AC |
414 | gdbarch_info_init (&info); |
415 | info.byte_order = BFD_ENDIAN_LITTLE; | |
416 | if (! gdbarch_update_p (info)) | |
417 | printf_unfiltered ("Little endian target not supported by GDB\n"); | |
b4a20239 AC |
418 | } |
419 | else if (set_endian_string == endian_big) | |
420 | { | |
d90cf509 | 421 | struct gdbarch_info info; |
b4a20239 | 422 | target_byte_order_auto = 0; |
d90cf509 AC |
423 | gdbarch_info_init (&info); |
424 | info.byte_order = BFD_ENDIAN_BIG; | |
425 | if (! gdbarch_update_p (info)) | |
426 | printf_unfiltered ("Big endian target not supported by GDB\n"); | |
b4a20239 AC |
427 | } |
428 | else | |
8e65ff28 AC |
429 | internal_error (__FILE__, __LINE__, |
430 | "set_endian: bad value"); | |
b4a20239 AC |
431 | show_endian (NULL, from_tty); |
432 | } | |
433 | ||
b4a20239 AC |
434 | /* Functions to manipulate the architecture of the target */ |
435 | ||
436 | enum set_arch { set_arch_auto, set_arch_manual }; | |
437 | ||
438 | int target_architecture_auto = 1; | |
439 | ||
53904c9e | 440 | const char *set_architecture_string; |
b4a20239 | 441 | |
b4a20239 AC |
442 | /* Called if the user enters ``show architecture'' without an |
443 | argument. */ | |
444 | ||
445 | static void | |
446 | show_architecture (char *args, int from_tty) | |
447 | { | |
448 | const char *arch; | |
449 | arch = TARGET_ARCHITECTURE->printable_name; | |
450 | if (target_architecture_auto) | |
451 | printf_filtered ("The target architecture is set automatically (currently %s)\n", arch); | |
452 | else | |
453 | printf_filtered ("The target architecture is assumed to be %s\n", arch); | |
454 | } | |
455 | ||
456 | ||
457 | /* Called if the user enters ``set architecture'' with or without an | |
458 | argument. */ | |
459 | ||
460 | static void | |
461 | set_architecture (char *ignore_args, int from_tty, struct cmd_list_element *c) | |
462 | { | |
463 | if (strcmp (set_architecture_string, "auto") == 0) | |
464 | { | |
465 | target_architecture_auto = 1; | |
466 | } | |
d90cf509 | 467 | else |
b4a20239 AC |
468 | { |
469 | struct gdbarch_info info; | |
fb6ecb0f | 470 | gdbarch_info_init (&info); |
b4a20239 AC |
471 | info.bfd_arch_info = bfd_scan_arch (set_architecture_string); |
472 | if (info.bfd_arch_info == NULL) | |
8e65ff28 AC |
473 | internal_error (__FILE__, __LINE__, |
474 | "set_architecture: bfd_scan_arch failed"); | |
16f33e29 | 475 | if (gdbarch_update_p (info)) |
b4a20239 AC |
476 | target_architecture_auto = 0; |
477 | else | |
ec3d358c | 478 | printf_unfiltered ("Architecture `%s' not recognized.\n", |
b4a20239 AC |
479 | set_architecture_string); |
480 | } | |
b4a20239 AC |
481 | show_architecture (NULL, from_tty); |
482 | } | |
483 | ||
2b026650 MK |
484 | /* FIXME: kettenis/20031124: Of the functions that follow, only |
485 | gdbarch_from_bfd is supposed to survive. The others will | |
486 | dissappear since in the future GDB will (hopefully) be truly | |
487 | multi-arch. However, for now we're still stuck with the concept of | |
488 | a single active architecture. */ | |
b4a20239 | 489 | |
2b026650 MK |
490 | /* Make GDBARCH the currently selected architecture. */ |
491 | ||
492 | static void | |
493 | deprecated_select_gdbarch_hack (struct gdbarch *gdbarch) | |
494 | { | |
495 | struct gdbarch_info info; | |
496 | ||
497 | /* FIXME: kettenis/20031024: The only way to select a specific | |
498 | architecture is to clone its `struct gdbarch_info', and update | |
499 | according to that copy. This is gross, but significant work will | |
500 | need to be done before we can take a more sane approach. */ | |
501 | gdbarch_info_init (&info); | |
502 | info.bfd_arch_info = gdbarch_bfd_arch_info (gdbarch); | |
503 | info.byte_order = gdbarch_byte_order (gdbarch); | |
504 | info.osabi = gdbarch_osabi (gdbarch); | |
505 | gdbarch_update_p (info); | |
506 | gdb_assert (gdbarch == current_gdbarch); | |
507 | } | |
508 | ||
509 | /* Return the architecture for ABFD. If no suitable architecture | |
510 | could be find, return NULL. */ | |
511 | ||
512 | struct gdbarch * | |
513 | gdbarch_from_bfd (bfd *abfd) | |
b4a20239 | 514 | { |
2b026650 MK |
515 | struct gdbarch *old_gdbarch = current_gdbarch; |
516 | struct gdbarch *new_gdbarch; | |
d90cf509 | 517 | struct gdbarch_info info; |
2b026650 MK |
518 | |
519 | /* FIXME: kettenis/20031024: The only way to find the architecture | |
520 | for a certain BFD is by doing an architecture update. This | |
521 | activates the architecture, so we need to reactivate the old | |
522 | architecture. This is gross, but significant work will need to | |
523 | be done before we can take a more sane approach. */ | |
d90cf509 AC |
524 | gdbarch_info_init (&info); |
525 | info.abfd = abfd; | |
526 | if (! gdbarch_update_p (info)) | |
2b026650 MK |
527 | return NULL; |
528 | ||
529 | new_gdbarch = current_gdbarch; | |
530 | deprecated_select_gdbarch_hack (old_gdbarch); | |
531 | return new_gdbarch; | |
532 | } | |
533 | ||
534 | /* Set the dynamic target-system-dependent parameters (architecture, | |
535 | byte-order) using information found in the BFD */ | |
536 | ||
537 | void | |
538 | set_gdbarch_from_file (bfd *abfd) | |
539 | { | |
540 | struct gdbarch *gdbarch; | |
541 | ||
542 | gdbarch = gdbarch_from_bfd (abfd); | |
543 | if (gdbarch == NULL) | |
d90cf509 | 544 | error ("Architecture of file not recognized.\n"); |
2b026650 | 545 | deprecated_select_gdbarch_hack (gdbarch); |
b4a20239 AC |
546 | } |
547 | ||
548 | /* Initialize the current architecture. Update the ``set | |
549 | architecture'' command so that it specifies a list of valid | |
550 | architectures. */ | |
551 | ||
1ba607ad AC |
552 | #ifdef DEFAULT_BFD_ARCH |
553 | extern const bfd_arch_info_type DEFAULT_BFD_ARCH; | |
554 | static const bfd_arch_info_type *default_bfd_arch = &DEFAULT_BFD_ARCH; | |
555 | #else | |
4b9b3959 | 556 | static const bfd_arch_info_type *default_bfd_arch; |
1ba607ad AC |
557 | #endif |
558 | ||
559 | #ifdef DEFAULT_BFD_VEC | |
560 | extern const bfd_target DEFAULT_BFD_VEC; | |
561 | static const bfd_target *default_bfd_vec = &DEFAULT_BFD_VEC; | |
562 | #else | |
563 | static const bfd_target *default_bfd_vec; | |
564 | #endif | |
565 | ||
b4a20239 AC |
566 | void |
567 | initialize_current_architecture (void) | |
568 | { | |
569 | const char **arches = gdbarch_printable_names (); | |
b4a20239 | 570 | |
1ba607ad AC |
571 | /* determine a default architecture and byte order. */ |
572 | struct gdbarch_info info; | |
fb6ecb0f | 573 | gdbarch_info_init (&info); |
1ba607ad AC |
574 | |
575 | /* Find a default architecture. */ | |
576 | if (info.bfd_arch_info == NULL | |
577 | && default_bfd_arch != NULL) | |
578 | info.bfd_arch_info = default_bfd_arch; | |
579 | if (info.bfd_arch_info == NULL) | |
b4a20239 | 580 | { |
1ba607ad AC |
581 | /* Choose the architecture by taking the first one |
582 | alphabetically. */ | |
583 | const char *chosen = arches[0]; | |
b4a20239 | 584 | const char **arch; |
b4a20239 AC |
585 | for (arch = arches; *arch != NULL; arch++) |
586 | { | |
b4a20239 AC |
587 | if (strcmp (*arch, chosen) < 0) |
588 | chosen = *arch; | |
589 | } | |
590 | if (chosen == NULL) | |
8e65ff28 AC |
591 | internal_error (__FILE__, __LINE__, |
592 | "initialize_current_architecture: No arch"); | |
b4a20239 AC |
593 | info.bfd_arch_info = bfd_scan_arch (chosen); |
594 | if (info.bfd_arch_info == NULL) | |
8e65ff28 AC |
595 | internal_error (__FILE__, __LINE__, |
596 | "initialize_current_architecture: Arch not found"); | |
1ba607ad AC |
597 | } |
598 | ||
afe64c1a | 599 | /* Take several guesses at a byte order. */ |
428721aa | 600 | if (info.byte_order == BFD_ENDIAN_UNKNOWN |
1ba607ad AC |
601 | && default_bfd_vec != NULL) |
602 | { | |
603 | /* Extract BFD's default vector's byte order. */ | |
604 | switch (default_bfd_vec->byteorder) | |
605 | { | |
606 | case BFD_ENDIAN_BIG: | |
d7449b42 | 607 | info.byte_order = BFD_ENDIAN_BIG; |
1ba607ad AC |
608 | break; |
609 | case BFD_ENDIAN_LITTLE: | |
778eb05e | 610 | info.byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad AC |
611 | break; |
612 | default: | |
613 | break; | |
614 | } | |
615 | } | |
428721aa | 616 | if (info.byte_order == BFD_ENDIAN_UNKNOWN) |
1ba607ad AC |
617 | { |
618 | /* look for ``*el-*'' in the target name. */ | |
619 | const char *chp; | |
620 | chp = strchr (target_name, '-'); | |
621 | if (chp != NULL | |
622 | && chp - 2 >= target_name | |
623 | && strncmp (chp - 2, "el", 2) == 0) | |
778eb05e | 624 | info.byte_order = BFD_ENDIAN_LITTLE; |
1ba607ad | 625 | } |
428721aa | 626 | if (info.byte_order == BFD_ENDIAN_UNKNOWN) |
1ba607ad AC |
627 | { |
628 | /* Wire it to big-endian!!! */ | |
d7449b42 | 629 | info.byte_order = BFD_ENDIAN_BIG; |
1ba607ad AC |
630 | } |
631 | ||
d90cf509 AC |
632 | if (! gdbarch_update_p (info)) |
633 | internal_error (__FILE__, __LINE__, | |
634 | "initialize_current_architecture: Selection of initial architecture failed"); | |
b4a20239 | 635 | |
1ba607ad AC |
636 | /* Create the ``set architecture'' command appending ``auto'' to the |
637 | list of architectures. */ | |
b4a20239 AC |
638 | { |
639 | struct cmd_list_element *c; | |
640 | /* Append ``auto''. */ | |
641 | int nr; | |
642 | for (nr = 0; arches[nr] != NULL; nr++); | |
643 | arches = xrealloc (arches, sizeof (char*) * (nr + 2)); | |
644 | arches[nr + 0] = "auto"; | |
645 | arches[nr + 1] = NULL; | |
646 | /* FIXME: add_set_enum_cmd() uses an array of ``char *'' instead | |
647 | of ``const char *''. We just happen to know that the casts are | |
648 | safe. */ | |
649 | c = add_set_enum_cmd ("architecture", class_support, | |
53904c9e | 650 | arches, &set_architecture_string, |
b4a20239 AC |
651 | "Set architecture of target.", |
652 | &setlist); | |
9f60d481 | 653 | set_cmd_sfunc (c, set_architecture); |
b4a20239 AC |
654 | add_alias_cmd ("processor", "architecture", class_support, 1, &setlist); |
655 | /* Don't use set_from_show - need to print both auto/manual and | |
656 | current setting. */ | |
657 | add_cmd ("architecture", class_support, show_architecture, | |
658 | "Show the current target architecture", &showlist); | |
b4a20239 AC |
659 | } |
660 | } | |
661 | ||
662 | ||
fb6ecb0f AC |
663 | /* Initialize a gdbarch info to values that will be automatically |
664 | overridden. Note: Originally, this ``struct info'' was initialized | |
ce2826aa | 665 | using memset(0). Unfortunately, that ran into problems, namely |
fb6ecb0f AC |
666 | BFD_ENDIAN_BIG is zero. An explicit initialization function that |
667 | can explicitly set each field to a well defined value is used. */ | |
668 | ||
669 | void | |
670 | gdbarch_info_init (struct gdbarch_info *info) | |
671 | { | |
672 | memset (info, 0, sizeof (struct gdbarch_info)); | |
428721aa | 673 | info->byte_order = BFD_ENDIAN_UNKNOWN; |
4be87837 | 674 | info->osabi = GDB_OSABI_UNINITIALIZED; |
fb6ecb0f AC |
675 | } |
676 | ||
c0e8c252 AC |
677 | /* */ |
678 | ||
a78f21af | 679 | extern initialize_file_ftype _initialize_gdbarch_utils; /* -Wmissing-prototypes */ |
c0e8c252 AC |
680 | |
681 | void | |
b4a20239 | 682 | _initialize_gdbarch_utils (void) |
c0e8c252 | 683 | { |
b4a20239 AC |
684 | struct cmd_list_element *c; |
685 | c = add_set_enum_cmd ("endian", class_support, | |
686 | endian_enum, &set_endian_string, | |
687 | "Set endianness of target.", | |
688 | &setlist); | |
9f60d481 | 689 | set_cmd_sfunc (c, set_endian); |
b4a20239 AC |
690 | /* Don't use set_from_show - need to print both auto/manual and |
691 | current setting. */ | |
692 | add_cmd ("endian", class_support, show_endian, | |
693 | "Show the current byte-order", &showlist); | |
c0e8c252 | 694 | } |