1 /* Semi-dynamic architecture support for GDB, the GNU debugger.
2 Copyright 1998, Free Software Foundation, Inc.
4 This file is part of GDB.
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.
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.
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. */
26 /* Non-zero if we want to trace architecture code. */
29 #define GDBARCH_DEBUG 0
31 int gdbarch_debug
= GDBARCH_DEBUG
;
34 /* Functions to manipulate the endianness of the target. */
36 #ifdef TARGET_BYTE_ORDER_SELECTABLE
37 /* compat - Catch old targets that expect a selectable byte-order to
38 default to BIG_ENDIAN */
39 #ifndef TARGET_BYTE_ORDER_DEFAULT
40 #define TARGET_BYTE_ORDER_DEFAULT BIG_ENDIAN
43 #ifndef TARGET_BYTE_ORDER_DEFAULT
44 /* compat - Catch old non byte-order selectable targets that do not
45 define TARGET_BYTE_ORDER_DEFAULT and instead expect
46 TARGET_BYTE_ORDER to be used as the default. For targets that
47 defined neither TARGET_BYTE_ORDER nor TARGET_BYTE_ORDER_DEFAULT the
48 below will get a strange compiler warning. */
49 #define TARGET_BYTE_ORDER_DEFAULT TARGET_BYTE_ORDER
51 int target_byte_order
= TARGET_BYTE_ORDER_DEFAULT
;
52 int target_byte_order_auto
= 1;
54 /* Chain containing the \"set endian\" commands. */
55 static struct cmd_list_element
*endianlist
= NULL
;
57 /* Called by ``show endian''. */
58 static void show_endian
PARAMS ((char *, int));
60 show_endian (args
, from_tty
)
65 (TARGET_BYTE_ORDER_AUTO
66 ? "The target endianness is set automatically (currently %s endian)\n"
67 : "The target is assumed to be %s endian\n");
68 printf_unfiltered (msg
, (TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little"));
71 /* Called if the user enters ``set endian'' without an argument. */
72 static void set_endian
PARAMS ((char *, int));
74 set_endian (args
, from_tty
)
78 printf_unfiltered ("\"set endian\" must be followed by \"auto\", \"big\" or \"little\".\n");
79 show_endian (args
, from_tty
);
82 /* Called by ``set endian big''. */
83 static void set_endian_big
PARAMS ((char *, int));
85 set_endian_big (args
, from_tty
)
89 if (TARGET_BYTE_ORDER_SELECTABLE_P
)
91 target_byte_order
= BIG_ENDIAN
;
92 target_byte_order_auto
= 0;
96 printf_unfiltered ("Byte order is not selectable.");
97 show_endian (args
, from_tty
);
101 /* Called by ``set endian little''. */
102 static void set_endian_little
PARAMS ((char *, int));
104 set_endian_little (args
, from_tty
)
108 if (TARGET_BYTE_ORDER_SELECTABLE_P
)
110 target_byte_order
= LITTLE_ENDIAN
;
111 target_byte_order_auto
= 0;
115 printf_unfiltered ("Byte order is not selectable.");
116 show_endian (args
, from_tty
);
120 /* Called by ``set endian auto''. */
121 static void set_endian_auto
PARAMS ((char *, int));
123 set_endian_auto (args
, from_tty
)
127 if (TARGET_BYTE_ORDER_SELECTABLE_P
)
129 target_byte_order_auto
= 1;
133 printf_unfiltered ("Byte order is not selectable.");
134 show_endian (args
, from_tty
);
138 /* Set the endianness from a BFD. */
139 static void set_endian_from_file
PARAMS ((bfd
*));
141 set_endian_from_file (abfd
)
144 if (TARGET_BYTE_ORDER_SELECTABLE_P
)
148 if (bfd_big_endian (abfd
))
151 want
= LITTLE_ENDIAN
;
152 if (TARGET_BYTE_ORDER_AUTO
)
153 target_byte_order
= want
;
154 else if (TARGET_BYTE_ORDER
!= want
)
155 warning ("%s endian file does not match %s endian target.",
156 want
== BIG_ENDIAN
? "big" : "little",
157 TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
161 if (bfd_big_endian (abfd
)
162 ? TARGET_BYTE_ORDER
!= BIG_ENDIAN
163 : TARGET_BYTE_ORDER
== BIG_ENDIAN
)
164 warning ("%s endian file does not match %s endian target.",
165 bfd_big_endian (abfd
) ? "big" : "little",
166 TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
172 /* Functions to manipulate the architecture of the target */
174 int target_architecture_auto
= 1;
175 extern const struct bfd_arch_info bfd_default_arch_struct
;
176 const struct bfd_arch_info
*target_architecture
= &bfd_default_arch_struct
;
177 int (*target_architecture_hook
) PARAMS ((const struct bfd_arch_info
*ap
));
179 /* Do the real work of changing the current architecture */
182 const struct bfd_arch_info
*arch
;
184 /* FIXME: Is it compatible with gdb? */
185 /* Check with the target on the setting */
186 if (target_architecture_hook
!= NULL
187 && !target_architecture_hook (arch
))
188 printf_unfiltered ("Target does not support `%s' architecture.\n",
189 arch
->printable_name
);
192 target_architecture_auto
= 0;
193 target_architecture
= arch
;
197 /* Called if the user enters ``show architecture'' without an argument. */
198 static void show_architecture
PARAMS ((char *, int));
200 show_architecture (args
, from_tty
)
205 arch
= TARGET_ARCHITECTURE
->printable_name
;
206 if (target_architecture_auto
)
207 printf_filtered ("The target architecture is set automatically (currently %s)\n", arch
);
209 printf_filtered ("The target architecture is assumed to be %s\n", arch
);
212 /* Called if the user enters ``set architecture'' with or without an
214 static void set_architecture
PARAMS ((char *, int));
216 set_architecture (args
, from_tty
)
222 printf_unfiltered ("\"set architecture\" must be followed by \"auto\" or an architecture name.\n");
224 else if (strcmp (args
, "auto") == 0)
226 target_architecture_auto
= 1;
230 const struct bfd_arch_info
*arch
= bfd_scan_arch (args
);
234 printf_unfiltered ("Architecture `%s' not reconized.\n", args
);
238 /* Called if the user enters ``info architecture'' without an argument. */
239 static void info_architecture
PARAMS ((char *, int));
241 info_architecture (args
, from_tty
)
245 enum bfd_architecture a
;
246 printf_filtered ("Available architectures are:\n");
247 for (a
= bfd_arch_obscure
+ 1; a
< bfd_arch_last
; a
++)
249 const struct bfd_arch_info
*ap
= bfd_lookup_arch (a
, 0);
254 printf_filtered (" %s", ap
->printable_name
);
258 printf_filtered ("\n");
263 /* Set the architecture from arch/machine */
265 set_architecture_from_arch_mach (arch
, mach
)
266 enum bfd_architecture arch
;
269 const struct bfd_arch_info
*wanted
= bfd_lookup_arch (arch
, mach
);
273 fatal ("hardwired architecture/machine not reconized");
276 /* Set the architecture from a BFD */
277 static void set_architecture_from_file
PARAMS ((bfd
*));
279 set_architecture_from_file (abfd
)
282 const struct bfd_arch_info
*wanted
= bfd_get_arch_info (abfd
);
283 if (target_architecture_auto
)
285 if (target_architecture_hook
!= NULL
286 && !target_architecture_hook (wanted
))
287 warning ("Target may not support %s architecture",
288 wanted
->printable_name
);
289 target_architecture
= wanted
;
291 else if (wanted
!= target_architecture
)
293 warning ("%s architecture file may be incompatible with %s target.",
294 wanted
->printable_name
,
295 target_architecture
->printable_name
);
303 /* Pointer to the target-dependent disassembly function. */
304 int (*tm_print_insn
) PARAMS ((bfd_vma
, disassemble_info
*));
305 disassemble_info tm_print_insn_info
;
309 /* Set the dynamic target-system-dependant parameters (architecture,
310 byte-order) using information found in the BFD */
313 set_gdbarch_from_file (abfd
)
316 set_architecture_from_file (abfd
);
317 set_endian_from_file (abfd
);
321 extern void _initialize_gdbarch
PARAMS ((void));
323 _initialize_gdbarch ()
325 add_prefix_cmd ("endian", class_support
, set_endian
,
326 "Set endianness of target.",
327 &endianlist
, "set endian ", 0, &setlist
);
328 add_cmd ("big", class_support
, set_endian_big
,
329 "Set target as being big endian.", &endianlist
);
330 add_cmd ("little", class_support
, set_endian_little
,
331 "Set target as being little endian.", &endianlist
);
332 add_cmd ("auto", class_support
, set_endian_auto
,
333 "Select target endianness automatically.", &endianlist
);
334 add_cmd ("endian", class_support
, show_endian
,
335 "Show endianness of target.", &showlist
);
337 add_cmd ("architecture", class_support
, set_architecture
,
338 "Set architecture of target.", &setlist
);
339 add_alias_cmd ("processor", "architecture", class_support
, 1, &setlist
);
340 add_cmd ("architecture", class_support
, show_architecture
,
341 "Show architecture of target.", &showlist
);
342 add_cmd ("architecture", class_support
, info_architecture
,
343 "List supported target architectures", &infolist
);
345 INIT_DISASSEMBLE_INFO_NO_ARCH (tm_print_insn_info
, gdb_stdout
, (fprintf_ftype
)fprintf_filtered
);
346 tm_print_insn_info
.flavour
= bfd_target_unknown_flavour
;
347 tm_print_insn_info
.read_memory_func
= dis_asm_read_memory
;
348 tm_print_insn_info
.memory_error_func
= dis_asm_memory_error
;
349 tm_print_insn_info
.print_address_func
= dis_asm_print_address
;
351 #ifdef MAINTENANCE_CMDS
352 add_show_from_set (add_set_cmd ("archdebug",
355 (char *)&gdbarch_debug
,
356 "Set architecture debugging.\n\
357 When non-zero, architecture debugging is enabled.", &setlist
),