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f7e85b1b AC |
1 | /* Semi-dynamic architecture support for GDB, the GNU debugger. |
2 | Copyright 1998, Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GDB. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
19 | ||
20 | #include "defs.h" | |
21 | #include "bfd.h" | |
22 | #include "gdbcmd.h" | |
23 | ||
24 | ||
5036d102 AC |
25 | /* Non-zero if we want to trace architecture code. */ |
26 | ||
27 | #ifndef GDBARCH_DEBUG | |
28 | #define GDBARCH_DEBUG 1 | |
29 | #endif | |
30 | int gdbarch_debug = GDBARCH_DEBUG; | |
31 | ||
32 | ||
f7e85b1b AC |
33 | /* Functions to manipulate the endianness of the target. */ |
34 | ||
35 | #ifdef TARGET_BYTE_ORDER_SELECTABLE | |
36 | /* compat - Catch old targets that expect a selectable byte-order to | |
37 | default to BIG_ENDIAN */ | |
38 | #ifndef TARGET_BYTE_ORDER_DEFAULT | |
39 | #define TARGET_BYTE_ORDER_DEFAULT BIG_ENDIAN | |
40 | #endif | |
41 | #endif | |
42 | #ifndef TARGET_BYTE_ORDER_DEFAULT | |
43 | /* compat - Catch old non byte-order selectable targets that do not | |
44 | define TARGET_BYTE_ORDER_DEFAULT and instead expect | |
45 | TARGET_BYTE_ORDER to be used as the default. For targets that | |
46 | defined neither TARGET_BYTE_ORDER nor TARGET_BYTE_ORDER_DEFAULT the | |
47 | below will get a strange compiler warning. */ | |
48 | #define TARGET_BYTE_ORDER_DEFAULT TARGET_BYTE_ORDER | |
49 | #endif | |
50 | int target_byte_order = TARGET_BYTE_ORDER_DEFAULT; | |
51 | int target_byte_order_auto = 1; | |
52 | ||
53 | /* Chain containing the \"set endian\" commands. */ | |
54 | static struct cmd_list_element *endianlist = NULL; | |
55 | ||
56 | /* Called by ``show endian''. */ | |
57 | static void show_endian PARAMS ((char *, int)); | |
58 | static void | |
59 | show_endian (args, from_tty) | |
60 | char *args; | |
61 | int from_tty; | |
62 | { | |
63 | char *msg = | |
64 | (TARGET_BYTE_ORDER_AUTO | |
65 | ? "The target endianness is set automatically (currently %s endian)\n" | |
66 | : "The target is assumed to be %s endian\n"); | |
67 | printf_unfiltered (msg, (TARGET_BYTE_ORDER == BIG_ENDIAN ? "big" : "little")); | |
68 | } | |
69 | ||
70 | /* Called if the user enters ``set endian'' without an argument. */ | |
71 | static void set_endian PARAMS ((char *, int)); | |
72 | static void | |
73 | set_endian (args, from_tty) | |
74 | char *args; | |
75 | int from_tty; | |
76 | { | |
77 | printf_unfiltered ("\"set endian\" must be followed by \"auto\", \"big\" or \"little\".\n"); | |
78 | show_endian (args, from_tty); | |
79 | } | |
80 | ||
81 | /* Called by ``set endian big''. */ | |
82 | static void set_endian_big PARAMS ((char *, int)); | |
83 | static void | |
84 | set_endian_big (args, from_tty) | |
85 | char *args; | |
86 | int from_tty; | |
87 | { | |
88 | if (TARGET_BYTE_ORDER_SELECTABLE_P) | |
89 | { | |
90 | target_byte_order = BIG_ENDIAN; | |
91 | target_byte_order_auto = 0; | |
92 | } | |
93 | else | |
94 | { | |
95 | printf_unfiltered ("Byte order is not selectable."); | |
96 | show_endian (args, from_tty); | |
97 | } | |
98 | } | |
99 | ||
100 | /* Called by ``set endian little''. */ | |
101 | static void set_endian_little PARAMS ((char *, int)); | |
102 | static void | |
103 | set_endian_little (args, from_tty) | |
104 | char *args; | |
105 | int from_tty; | |
106 | { | |
107 | if (TARGET_BYTE_ORDER_SELECTABLE_P) | |
108 | { | |
109 | target_byte_order = LITTLE_ENDIAN; | |
110 | target_byte_order_auto = 0; | |
111 | } | |
112 | else | |
113 | { | |
114 | printf_unfiltered ("Byte order is not selectable."); | |
115 | show_endian (args, from_tty); | |
116 | } | |
117 | } | |
118 | ||
119 | /* Called by ``set endian auto''. */ | |
120 | static void set_endian_auto PARAMS ((char *, int)); | |
121 | static void | |
122 | set_endian_auto (args, from_tty) | |
123 | char *args; | |
124 | int from_tty; | |
125 | { | |
126 | if (TARGET_BYTE_ORDER_SELECTABLE_P) | |
127 | { | |
128 | target_byte_order_auto = 1; | |
129 | } | |
130 | else | |
131 | { | |
132 | printf_unfiltered ("Byte order is not selectable."); | |
133 | show_endian (args, from_tty); | |
134 | } | |
135 | } | |
136 | ||
137 | /* Set the endianness from a BFD. */ | |
138 | static void set_endian_from_file PARAMS ((bfd *)); | |
139 | static void | |
140 | set_endian_from_file (abfd) | |
141 | bfd *abfd; | |
142 | { | |
143 | if (TARGET_BYTE_ORDER_SELECTABLE_P) | |
144 | { | |
145 | int want; | |
146 | ||
147 | if (bfd_big_endian (abfd)) | |
148 | want = BIG_ENDIAN; | |
149 | else | |
150 | want = LITTLE_ENDIAN; | |
151 | if (TARGET_BYTE_ORDER_AUTO) | |
152 | target_byte_order = want; | |
153 | else if (TARGET_BYTE_ORDER != want) | |
154 | warning ("%s endian file does not match %s endian target.", | |
155 | want == BIG_ENDIAN ? "big" : "little", | |
156 | TARGET_BYTE_ORDER == BIG_ENDIAN ? "big" : "little"); | |
157 | } | |
158 | else | |
159 | { | |
160 | if (bfd_big_endian (abfd) | |
161 | ? TARGET_BYTE_ORDER != BIG_ENDIAN | |
162 | : TARGET_BYTE_ORDER == BIG_ENDIAN) | |
163 | warning ("%s endian file does not match %s endian target.", | |
164 | bfd_big_endian (abfd) ? "big" : "little", | |
165 | TARGET_BYTE_ORDER == BIG_ENDIAN ? "big" : "little"); | |
166 | } | |
167 | } | |
168 | ||
169 | ||
170 | ||
171 | /* Functions to manipulate the architecture of the target */ | |
172 | ||
173 | int target_architecture_auto = 1; | |
5036d102 AC |
174 | extern const struct bfd_arch_info bfd_default_arch_struct; |
175 | const struct bfd_arch_info *target_architecture = &bfd_default_arch_struct; | |
176 | int (*target_architecture_hook) PARAMS ((const struct bfd_arch_info *ap)); | |
f7e85b1b AC |
177 | |
178 | /* Do the real work of changing the current architecture */ | |
179 | static void | |
180 | set_arch (arch) | |
5036d102 | 181 | const struct bfd_arch_info *arch; |
f7e85b1b AC |
182 | { |
183 | /* FIXME: Is it compatible with gdb? */ | |
184 | /* Check with the target on the setting */ | |
185 | if (target_architecture_hook != NULL | |
186 | && !target_architecture_hook (arch)) | |
187 | printf_unfiltered ("Target does not support `%s' architecture.\n", | |
188 | arch->printable_name); | |
189 | else | |
190 | { | |
191 | target_architecture_auto = 0; | |
192 | target_architecture = arch; | |
193 | } | |
194 | } | |
195 | ||
196 | /* Called if the user enters ``show architecture'' without an argument. */ | |
197 | static void show_architecture PARAMS ((char *, int)); | |
198 | static void | |
199 | show_architecture (args, from_tty) | |
200 | char *args; | |
201 | int from_tty; | |
202 | { | |
203 | const char *arch; | |
5036d102 | 204 | arch = TARGET_ARCHITECTURE->printable_name; |
f7e85b1b AC |
205 | if (target_architecture_auto) |
206 | printf_filtered ("The target architecture is set automatically (currently %s)\n", arch); | |
207 | else | |
208 | printf_filtered ("The target architecture is assumed to be %s\n", arch); | |
209 | } | |
210 | ||
211 | /* Called if the user enters ``set architecture'' with or without an | |
212 | argument. */ | |
213 | static void set_architecture PARAMS ((char *, int)); | |
214 | static void | |
215 | set_architecture (args, from_tty) | |
216 | char *args; | |
217 | int from_tty; | |
218 | { | |
219 | if (args == NULL) | |
220 | { | |
221 | printf_unfiltered ("\"set architecture\" must be followed by \"auto\" or an architecture name.\n"); | |
222 | } | |
223 | else if (strcmp (args, "auto") == 0) | |
224 | { | |
225 | target_architecture_auto = 1; | |
226 | } | |
227 | else | |
228 | { | |
5036d102 | 229 | const struct bfd_arch_info *arch = bfd_scan_arch (args); |
f7e85b1b AC |
230 | if (arch != NULL) |
231 | set_arch (arch); | |
232 | else | |
233 | printf_unfiltered ("Architecture `%s' not reconized.\n", args); | |
234 | } | |
235 | } | |
236 | ||
237 | /* Called if the user enters ``info architecture'' without an argument. */ | |
238 | static void info_architecture PARAMS ((char *, int)); | |
239 | static void | |
240 | info_architecture (args, from_tty) | |
241 | char *args; | |
242 | int from_tty; | |
243 | { | |
244 | enum bfd_architecture a; | |
245 | printf_filtered ("Available architectures are:\n"); | |
246 | for (a = bfd_arch_obscure + 1; a < bfd_arch_last; a++) | |
247 | { | |
5036d102 | 248 | const struct bfd_arch_info *ap = bfd_lookup_arch (a, 0); |
f7e85b1b AC |
249 | if (ap != NULL) |
250 | { | |
251 | do | |
252 | { | |
253 | printf_filtered (" %s", ap->printable_name); | |
254 | ap = ap->next; | |
255 | } | |
256 | while (ap != NULL); | |
257 | printf_filtered ("\n"); | |
258 | } | |
259 | } | |
260 | } | |
261 | ||
262 | /* Set the architecture from arch/machine */ | |
263 | void | |
264 | set_architecture_from_arch_mach (arch, mach) | |
265 | enum bfd_architecture arch; | |
266 | unsigned long mach; | |
267 | { | |
5036d102 | 268 | const struct bfd_arch_info *wanted = bfd_lookup_arch (arch, mach); |
f7e85b1b AC |
269 | if (wanted != NULL) |
270 | set_arch (wanted); | |
271 | else | |
272 | fatal ("hardwired architecture/machine not reconized"); | |
273 | } | |
274 | ||
275 | /* Set the architecture from a BFD */ | |
276 | static void set_architecture_from_file PARAMS ((bfd *)); | |
277 | static void | |
278 | set_architecture_from_file (abfd) | |
279 | bfd *abfd; | |
280 | { | |
5036d102 | 281 | const struct bfd_arch_info *wanted = bfd_get_arch_info (abfd); |
f7e85b1b AC |
282 | if (target_architecture_auto) |
283 | { | |
284 | if (target_architecture_hook != NULL | |
285 | && !target_architecture_hook (wanted)) | |
286 | warning ("Target may not support %s architecture", | |
287 | wanted->printable_name); | |
288 | target_architecture = wanted; | |
289 | } | |
290 | else if (wanted != target_architecture) | |
291 | { | |
292 | warning ("%s architecture file may be incompatible with %s target.", | |
293 | wanted->printable_name, | |
294 | target_architecture->printable_name); | |
295 | } | |
296 | } | |
297 | ||
298 | ||
299 | ||
300 | /* Disassembler */ | |
301 | ||
302 | /* Pointer to the target-dependent disassembly function. */ | |
303 | int (*tm_print_insn) PARAMS ((bfd_vma, disassemble_info *)); | |
304 | disassemble_info tm_print_insn_info; | |
305 | ||
306 | ||
307 | ||
308 | /* Set the dynamic target-system-dependant parameters (architecture, | |
309 | byte-order) using information found in the BFD */ | |
310 | ||
311 | void | |
312 | set_gdbarch_from_file (abfd) | |
313 | bfd *abfd; | |
314 | { | |
315 | set_architecture_from_file (abfd); | |
316 | set_endian_from_file (abfd); | |
317 | } | |
318 | ||
319 | ||
320 | extern void _initialize_gdbarch PARAMS ((void)); | |
321 | void | |
322 | _initialize_gdbarch () | |
323 | { | |
324 | add_prefix_cmd ("endian", class_support, set_endian, | |
325 | "Set endianness of target.", | |
326 | &endianlist, "set endian ", 0, &setlist); | |
327 | add_cmd ("big", class_support, set_endian_big, | |
328 | "Set target as being big endian.", &endianlist); | |
329 | add_cmd ("little", class_support, set_endian_little, | |
330 | "Set target as being little endian.", &endianlist); | |
331 | add_cmd ("auto", class_support, set_endian_auto, | |
332 | "Select target endianness automatically.", &endianlist); | |
333 | add_cmd ("endian", class_support, show_endian, | |
334 | "Show endianness of target.", &showlist); | |
335 | ||
336 | add_cmd ("architecture", class_support, set_architecture, | |
337 | "Set architecture of target.", &setlist); | |
338 | add_alias_cmd ("processor", "architecture", class_support, 1, &setlist); | |
339 | add_cmd ("architecture", class_support, show_architecture, | |
340 | "Show architecture of target.", &showlist); | |
341 | add_cmd ("architecture", class_support, info_architecture, | |
342 | "List supported target architectures", &infolist); | |
343 | ||
344 | INIT_DISASSEMBLE_INFO_NO_ARCH (tm_print_insn_info, gdb_stdout, (fprintf_ftype)fprintf_filtered); | |
345 | tm_print_insn_info.flavour = bfd_target_unknown_flavour; | |
346 | tm_print_insn_info.read_memory_func = dis_asm_read_memory; | |
347 | tm_print_insn_info.memory_error_func = dis_asm_memory_error; | |
348 | tm_print_insn_info.print_address_func = dis_asm_print_address; | |
5036d102 AC |
349 | |
350 | #ifdef MAINTENANCE_CMDS | |
351 | add_show_from_set (add_set_cmd ("archdebug", | |
352 | class_maintenance, | |
353 | var_zinteger, | |
354 | (char *)&gdbarch_debug, | |
355 | "Set architecture debugging.\n\ | |
356 | When non-zero, architecture debugging is enabled.", &setlist), | |
357 | &showlist); | |
358 | #endif | |
f7e85b1b | 359 | } |