1 /* Semi-dynamic architecture support for GDB, the GNU debugger.
2 Copyright 1998-1999, 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. */
22 /* Just include everything in sight so that the every old definition
23 of macro is visible. */
24 #include "gdb_string.h"
29 #include "breakpoint.h"
34 #include "gdbthread.h"
36 #include "symfile.h" /* for overlay functions */
40 /* Non-zero if we want to trace architecture code. */
43 #define GDBARCH_DEBUG 0
45 int gdbarch_debug = GDBARCH_DEBUG;
48 /* Functions to manipulate the endianness of the target. */
50 #ifdef TARGET_BYTE_ORDER_SELECTABLE
51 /* compat - Catch old targets that expect a selectable byte-order to
52 default to BIG_ENDIAN */
53 #ifndef TARGET_BYTE_ORDER_DEFAULT
54 #define TARGET_BYTE_ORDER_DEFAULT BIG_ENDIAN
57 #if !TARGET_BYTE_ORDER_SELECTABLE_P
58 #ifndef TARGET_BYTE_ORDER_DEFAULT
59 /* compat - Catch old non byte-order selectable targets that do not
60 define TARGET_BYTE_ORDER_DEFAULT and instead expect
61 TARGET_BYTE_ORDER to be used as the default. For targets that
62 defined neither TARGET_BYTE_ORDER nor TARGET_BYTE_ORDER_DEFAULT the
63 below will get a strange compiler warning. */
64 #define TARGET_BYTE_ORDER_DEFAULT TARGET_BYTE_ORDER
67 #ifndef TARGET_BYTE_ORDER_DEFAULT
68 #define TARGET_BYTE_ORDER_DEFAULT BIG_ENDIAN /* arbitrary */
70 int target_byte_order = TARGET_BYTE_ORDER_DEFAULT;
71 int target_byte_order_auto = 1;
73 /* Chain containing the \"set endian\" commands. */
74 static struct cmd_list_element *endianlist = NULL;
76 /* Called by ``show endian''. */
77 static void show_endian PARAMS ((char *, int));
79 show_endian (args, from_tty)
84 (TARGET_BYTE_ORDER_AUTO
85 ? "The target endianness is set automatically (currently %s endian)\n"
86 : "The target is assumed to be %s endian\n");
87 printf_unfiltered (msg, (TARGET_BYTE_ORDER == BIG_ENDIAN ? "big" : "little"));
90 /* Called if the user enters ``set endian'' without an argument. */
91 static void set_endian PARAMS ((char *, int));
93 set_endian (args, from_tty)
97 printf_unfiltered ("\"set endian\" must be followed by \"auto\", \"big\" or \"little\".\n");
98 show_endian (args, from_tty);
101 /* Called by ``set endian big''. */
102 static void set_endian_big PARAMS ((char *, int));
104 set_endian_big (args, from_tty)
108 if (TARGET_BYTE_ORDER_SELECTABLE_P)
110 target_byte_order = BIG_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 little''. */
121 static void set_endian_little PARAMS ((char *, int));
123 set_endian_little (args, from_tty)
127 if (TARGET_BYTE_ORDER_SELECTABLE_P)
129 target_byte_order = LITTLE_ENDIAN;
130 target_byte_order_auto = 0;
134 printf_unfiltered ("Byte order is not selectable.");
135 show_endian (args, from_tty);
139 /* Called by ``set endian auto''. */
140 static void set_endian_auto PARAMS ((char *, int));
142 set_endian_auto (args, from_tty)
146 if (TARGET_BYTE_ORDER_SELECTABLE_P)
148 target_byte_order_auto = 1;
152 printf_unfiltered ("Byte order is not selectable.");
153 show_endian (args, from_tty);
157 /* Set the endianness from a BFD. */
158 static void set_endian_from_file PARAMS ((bfd *));
160 set_endian_from_file (abfd)
163 if (TARGET_BYTE_ORDER_SELECTABLE_P)
167 if (bfd_big_endian (abfd))
170 want = LITTLE_ENDIAN;
171 if (TARGET_BYTE_ORDER_AUTO)
172 target_byte_order = want;
173 else if (TARGET_BYTE_ORDER != want)
174 warning ("%s endian file does not match %s endian target.",
175 want == BIG_ENDIAN ? "big" : "little",
176 TARGET_BYTE_ORDER == BIG_ENDIAN ? "big" : "little");
180 if (bfd_big_endian (abfd)
181 ? TARGET_BYTE_ORDER != BIG_ENDIAN
182 : TARGET_BYTE_ORDER == BIG_ENDIAN)
183 warning ("%s endian file does not match %s endian target.",
184 bfd_big_endian (abfd) ? "big" : "little",
185 TARGET_BYTE_ORDER == BIG_ENDIAN ? "big" : "little");
191 /* Functions to manipulate the architecture of the target */
193 int target_architecture_auto = 1;
194 extern const struct bfd_arch_info bfd_default_arch_struct;
195 const struct bfd_arch_info *target_architecture = &bfd_default_arch_struct;
196 int (*target_architecture_hook) PARAMS ((const struct bfd_arch_info *ap));
198 /* Do the real work of changing the current architecture */
200 static int arch_ok PARAMS ((const struct bfd_arch_info *arch));
203 const struct bfd_arch_info *arch;
205 /* Should be performing the more basic check that the binary is
206 compatible with GDB. */
207 /* Check with the target that the architecture is valid. */
208 return (target_architecture_hook == NULL
209 || target_architecture_hook (arch));
212 enum set_arch { set_arch_auto, set_arch_manual };
214 static void set_arch PARAMS ((const struct bfd_arch_info *arch, enum set_arch type));
216 set_arch (arch, type)
217 const struct bfd_arch_info *arch;
224 warning ("Target may not support %s architecture",
225 arch->printable_name);
226 target_architecture = arch;
228 case set_arch_manual:
231 printf_unfiltered ("Target does not support `%s' architecture.\n",
232 arch->printable_name);
236 target_architecture_auto = 0;
237 target_architecture = arch;
243 /* Called if the user enters ``show architecture'' without an argument. */
244 static void show_architecture PARAMS ((char *, int));
246 show_architecture (args, from_tty)
251 arch = TARGET_ARCHITECTURE->printable_name;
252 if (target_architecture_auto)
253 printf_filtered ("The target architecture is set automatically (currently %s)\n", arch);
255 printf_filtered ("The target architecture is assumed to be %s\n", arch);
258 /* Called if the user enters ``set architecture'' with or without an
260 static void set_architecture PARAMS ((char *, int));
262 set_architecture (args, from_tty)
268 printf_unfiltered ("\"set architecture\" must be followed by \"auto\" or an architecture name.\n");
270 else if (strcmp (args, "auto") == 0)
272 target_architecture_auto = 1;
276 const struct bfd_arch_info *arch = bfd_scan_arch (args);
278 set_arch (arch, set_arch_manual);
280 printf_unfiltered ("Architecture `%s' not reconized.\n", args);
284 /* Called if the user enters ``info architecture'' without an argument. */
285 static void info_architecture PARAMS ((char *, int));
287 info_architecture (args, from_tty)
291 enum bfd_architecture a;
292 printf_filtered ("Available architectures are:\n");
293 for (a = bfd_arch_obscure + 1; a < bfd_arch_last; a++)
295 const struct bfd_arch_info *ap = bfd_lookup_arch (a, 0);
300 printf_filtered (" %s", ap->printable_name);
304 printf_filtered ("\n");
309 /* Set the architecture from arch/machine */
311 set_architecture_from_arch_mach (arch, mach)
312 enum bfd_architecture arch;
315 const struct bfd_arch_info *wanted = bfd_lookup_arch (arch, mach);
317 set_arch (wanted, set_arch_manual);
319 fatal ("hardwired architecture/machine not reconized");
322 /* Set the architecture from a BFD */
323 static void set_architecture_from_file PARAMS ((bfd *));
325 set_architecture_from_file (abfd)
328 const struct bfd_arch_info *wanted = bfd_get_arch_info (abfd);
329 if (target_architecture_auto)
331 set_arch (wanted, set_arch_auto);
333 else if (wanted != target_architecture)
335 warning ("%s architecture file may be incompatible with %s target.",
336 wanted->printable_name,
337 target_architecture->printable_name);
342 /* Misc helper functions for targets. */
345 frame_num_args_unknown (fi)
346 struct frame_info *fi;
354 /* Pointer to the target-dependent disassembly function. */
355 int (*tm_print_insn) PARAMS ((bfd_vma, disassemble_info *));
356 disassemble_info tm_print_insn_info;
360 /* Set the dynamic target-system-dependant parameters (architecture,
361 byte-order) using information found in the BFD */
364 set_gdbarch_from_file (abfd)
367 set_architecture_from_file (abfd);
368 set_endian_from_file (abfd);
372 #if defined (CALL_DUMMY)
373 /* FIXME - this should go away */
374 LONGEST call_dummy_words[] = CALL_DUMMY;
375 int sizeof_call_dummy_words = sizeof (call_dummy_words);
379 extern void _initialize_gdbarch PARAMS ((void));
381 _initialize_gdbarch ()
383 add_prefix_cmd ("endian", class_support, set_endian,
384 "Set endianness of target.",
385 &endianlist, "set endian ", 0, &setlist);
386 add_cmd ("big", class_support, set_endian_big,
387 "Set target as being big endian.", &endianlist);
388 add_cmd ("little", class_support, set_endian_little,
389 "Set target as being little endian.", &endianlist);
390 add_cmd ("auto", class_support, set_endian_auto,
391 "Select target endianness automatically.", &endianlist);
392 add_cmd ("endian", class_support, show_endian,
393 "Show endianness of target.", &showlist);
395 add_cmd ("architecture", class_support, set_architecture,
396 "Set architecture of target.", &setlist);
397 add_alias_cmd ("processor", "architecture", class_support, 1, &setlist);
398 add_cmd ("architecture", class_support, show_architecture,
399 "Show architecture of target.", &showlist);
400 add_cmd ("architecture", class_support, info_architecture,
401 "List supported target architectures", &infolist);
403 INIT_DISASSEMBLE_INFO_NO_ARCH (tm_print_insn_info, gdb_stdout, (fprintf_ftype)fprintf_filtered);
404 tm_print_insn_info.flavour = bfd_target_unknown_flavour;
405 tm_print_insn_info.read_memory_func = dis_asm_read_memory;
406 tm_print_insn_info.memory_error_func = dis_asm_memory_error;
407 tm_print_insn_info.print_address_func = dis_asm_print_address;
409 add_show_from_set (add_set_cmd ("archdebug",
412 (char *)&gdbarch_debug,
413 "Set architecture debugging.\n\
414 When non-zero, architecture debugging is enabled.", &setlist),