1 /* Dynamic architecture support for GDB, the GNU debugger.
2 Copyright 1998, 1999, 2000, 2001 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,
19 Boston, MA 02111-1307, USA. */
25 #include "inferior.h" /* enum CALL_DUMMY_LOCATION et.al. */
27 /* Just include everything in sight so that the every old definition
28 of macro is visible. */
29 #include "gdb_string.h"
33 #include "breakpoint.h"
38 #include "gdbthread.h"
40 #include "symfile.h" /* for overlay functions */
45 #include "floatformat.h"
47 /* Convenience macro for allocting typesafe memory. */
50 #define XMALLOC(TYPE) (TYPE*) xmalloc (sizeof (TYPE))
54 /* Use the program counter to determine the contents and size
55 of a breakpoint instruction. If no target-dependent macro
56 BREAKPOINT_FROM_PC has been defined to implement this function,
57 assume that the breakpoint doesn't depend on the PC, and
58 use the values of the BIG_BREAKPOINT and LITTLE_BREAKPOINT macros.
59 Return a pointer to a string of bytes that encode a breakpoint
60 instruction, stores the length of the string to *lenptr,
61 and optionally adjust the pc to point to the correct memory location
62 for inserting the breakpoint. */
65 legacy_breakpoint_from_pc (CORE_ADDR
* pcptr
, int *lenptr
)
67 /* {BIG_,LITTLE_}BREAKPOINT is the sequence of bytes we insert for a
68 breakpoint. On some machines, breakpoints are handled by the
69 target environment and we don't have to worry about them here. */
71 if (TARGET_BYTE_ORDER
== BIG_ENDIAN
)
73 static unsigned char big_break_insn
[] = BIG_BREAKPOINT
;
74 *lenptr
= sizeof (big_break_insn
);
75 return big_break_insn
;
78 #ifdef LITTLE_BREAKPOINT
79 if (TARGET_BYTE_ORDER
!= BIG_ENDIAN
)
81 static unsigned char little_break_insn
[] = LITTLE_BREAKPOINT
;
82 *lenptr
= sizeof (little_break_insn
);
83 return little_break_insn
;
88 static unsigned char break_insn
[] = BREAKPOINT
;
89 *lenptr
= sizeof (break_insn
);
98 generic_frameless_function_invocation_not (struct frame_info
*fi
)
104 generic_return_value_on_stack_not (struct type
*type
)
110 legacy_register_name (int i
)
112 #ifdef REGISTER_NAMES
113 static char *names
[] = REGISTER_NAMES
;
114 if (i
< 0 || i
>= (sizeof (names
) / sizeof (*names
)))
119 internal_error (__FILE__
, __LINE__
,
120 "legacy_register_name: called.");
125 #if defined (CALL_DUMMY)
126 LONGEST legacy_call_dummy_words
[] = CALL_DUMMY
;
128 LONGEST legacy_call_dummy_words
[1];
130 int legacy_sizeof_call_dummy_words
= sizeof (legacy_call_dummy_words
);
133 generic_remote_translate_xfer_address (CORE_ADDR gdb_addr
, int gdb_len
,
134 CORE_ADDR
* rem_addr
, int *rem_len
)
136 *rem_addr
= gdb_addr
;
141 generic_prologue_frameless_p (CORE_ADDR ip
)
143 #ifdef SKIP_PROLOGUE_FRAMELESS_P
144 return ip
== SKIP_PROLOGUE_FRAMELESS_P (ip
);
146 return ip
== SKIP_PROLOGUE (ip
);
151 /* Helper functions for INNER_THAN */
154 core_addr_lessthan (CORE_ADDR lhs
, CORE_ADDR rhs
)
160 core_addr_greaterthan (CORE_ADDR lhs
, CORE_ADDR rhs
)
166 /* Helper functions for TARGET_{FLOAT,DOUBLE}_FORMAT */
168 const struct floatformat
*
169 default_float_format (struct gdbarch
*gdbarch
)
172 int byte_order
= gdbarch_byte_order (gdbarch
);
174 int byte_order
= TARGET_BYTE_ORDER
;
179 return &floatformat_ieee_single_big
;
181 return &floatformat_ieee_single_little
;
183 internal_error (__FILE__
, __LINE__
,
184 "default_float_format: bad byte order");
189 const struct floatformat
*
190 default_double_format (struct gdbarch
*gdbarch
)
193 int byte_order
= gdbarch_byte_order (gdbarch
);
195 int byte_order
= TARGET_BYTE_ORDER
;
200 return &floatformat_ieee_double_big
;
202 return &floatformat_ieee_double_little
;
204 internal_error (__FILE__
, __LINE__
,
205 "default_double_format: bad byte order");
209 /* Misc helper functions for targets. */
212 frame_num_args_unknown (struct frame_info
*fi
)
219 generic_register_convertible_not (int num
)
226 default_register_sim_regno (int num
)
233 default_convert_from_func_ptr_addr (CORE_ADDR addr
)
239 no_op_reg_to_regnum (int reg
)
244 /* For use by frame_args_address and frame_locals_address. */
246 default_frame_address (struct frame_info
*fi
)
251 /* Functions to manipulate the endianness of the target. */
253 #ifdef TARGET_BYTE_ORDER_SELECTABLE
254 /* compat - Catch old targets that expect a selectable byte-order to
255 default to BIG_ENDIAN */
256 #ifndef TARGET_BYTE_ORDER_DEFAULT
257 #define TARGET_BYTE_ORDER_DEFAULT BIG_ENDIAN
260 #if !TARGET_BYTE_ORDER_SELECTABLE_P
261 #ifndef TARGET_BYTE_ORDER_DEFAULT
262 /* compat - Catch old non byte-order selectable targets that do not
263 define TARGET_BYTE_ORDER_DEFAULT and instead expect
264 TARGET_BYTE_ORDER to be used as the default. For targets that
265 defined neither TARGET_BYTE_ORDER nor TARGET_BYTE_ORDER_DEFAULT the
266 below will get a strange compiler warning. */
267 #define TARGET_BYTE_ORDER_DEFAULT TARGET_BYTE_ORDER
270 #ifndef TARGET_BYTE_ORDER_DEFAULT
271 #define TARGET_BYTE_ORDER_DEFAULT BIG_ENDIAN /* arbitrary */
273 /* ``target_byte_order'' is only used when non- multi-arch.
274 Multi-arch targets obtain the current byte order using
275 TARGET_BYTE_ORDER which is controlled by gdbarch.*. */
276 int target_byte_order
= TARGET_BYTE_ORDER_DEFAULT
;
277 int target_byte_order_auto
= 1;
279 static const char endian_big
[] = "big";
280 static const char endian_little
[] = "little";
281 static const char endian_auto
[] = "auto";
282 static const char *endian_enum
[] =
289 static const char *set_endian_string
;
291 /* Called by ``show endian''. */
294 show_endian (char *args
, int from_tty
)
296 if (TARGET_BYTE_ORDER_AUTO
)
297 printf_unfiltered ("The target endianness is set automatically (currently %s endian)\n",
298 (TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little"));
300 printf_unfiltered ("The target is assumed to be %s endian\n",
301 (TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little"));
305 set_endian (char *ignore_args
, int from_tty
, struct cmd_list_element
*c
)
307 if (!TARGET_BYTE_ORDER_SELECTABLE_P
)
309 printf_unfiltered ("Byte order is not selectable.");
311 else if (set_endian_string
== endian_auto
)
313 target_byte_order_auto
= 1;
315 else if (set_endian_string
== endian_little
)
317 target_byte_order_auto
= 0;
320 struct gdbarch_info info
;
321 memset (&info
, 0, sizeof info
);
322 info
.byte_order
= LITTLE_ENDIAN
;
323 if (! gdbarch_update_p (info
))
325 printf_unfiltered ("Little endian target not supported by GDB\n");
330 target_byte_order
= LITTLE_ENDIAN
;
333 else if (set_endian_string
== endian_big
)
335 target_byte_order_auto
= 0;
338 struct gdbarch_info info
;
339 memset (&info
, 0, sizeof info
);
340 info
.byte_order
= BIG_ENDIAN
;
341 if (! gdbarch_update_p (info
))
343 printf_unfiltered ("Big endian target not supported by GDB\n");
348 target_byte_order
= BIG_ENDIAN
;
352 internal_error (__FILE__
, __LINE__
,
353 "set_endian: bad value");
354 show_endian (NULL
, from_tty
);
357 /* Set the endianness from a BFD. */
360 set_endian_from_file (bfd
*abfd
)
363 internal_error (__FILE__
, __LINE__
,
364 "set_endian_from_file: not for multi-arch");
365 if (TARGET_BYTE_ORDER_SELECTABLE_P
)
369 if (bfd_big_endian (abfd
))
372 want
= LITTLE_ENDIAN
;
373 if (TARGET_BYTE_ORDER_AUTO
)
374 target_byte_order
= want
;
375 else if (TARGET_BYTE_ORDER
!= want
)
376 warning ("%s endian file does not match %s endian target.",
377 want
== BIG_ENDIAN
? "big" : "little",
378 TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
382 if (bfd_big_endian (abfd
)
383 ? TARGET_BYTE_ORDER
!= BIG_ENDIAN
384 : TARGET_BYTE_ORDER
== BIG_ENDIAN
)
385 warning ("%s endian file does not match %s endian target.",
386 bfd_big_endian (abfd
) ? "big" : "little",
387 TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
392 /* Functions to manipulate the architecture of the target */
394 enum set_arch
{ set_arch_auto
, set_arch_manual
};
396 int target_architecture_auto
= 1;
398 const char *set_architecture_string
;
400 /* Old way of changing the current architecture. */
402 extern const struct bfd_arch_info bfd_default_arch_struct
;
403 const struct bfd_arch_info
*target_architecture
= &bfd_default_arch_struct
;
404 int (*target_architecture_hook
) (const struct bfd_arch_info
*ap
);
407 arch_ok (const struct bfd_arch_info
*arch
)
410 internal_error (__FILE__
, __LINE__
,
411 "arch_ok: not multi-arched");
412 /* Should be performing the more basic check that the binary is
413 compatible with GDB. */
414 /* Check with the target that the architecture is valid. */
415 return (target_architecture_hook
== NULL
416 || target_architecture_hook (arch
));
420 set_arch (const struct bfd_arch_info
*arch
,
424 internal_error (__FILE__
, __LINE__
,
425 "set_arch: not multi-arched");
430 warning ("Target may not support %s architecture",
431 arch
->printable_name
);
432 target_architecture
= arch
;
434 case set_arch_manual
:
437 printf_unfiltered ("Target does not support `%s' architecture.\n",
438 arch
->printable_name
);
442 target_architecture_auto
= 0;
443 target_architecture
= arch
;
448 gdbarch_dump (current_gdbarch
, gdb_stdlog
);
451 /* Set the architecture from arch/machine (deprecated) */
454 set_architecture_from_arch_mach (enum bfd_architecture arch
,
457 const struct bfd_arch_info
*wanted
= bfd_lookup_arch (arch
, mach
);
459 internal_error (__FILE__
, __LINE__
,
460 "set_architecture_from_arch_mach: not multi-arched");
462 set_arch (wanted
, set_arch_manual
);
464 internal_error (__FILE__
, __LINE__
,
465 "gdbarch: hardwired architecture/machine not recognized");
468 /* Set the architecture from a BFD (deprecated) */
471 set_architecture_from_file (bfd
*abfd
)
473 const struct bfd_arch_info
*wanted
= bfd_get_arch_info (abfd
);
475 internal_error (__FILE__
, __LINE__
,
476 "set_architecture_from_file: not multi-arched");
477 if (target_architecture_auto
)
479 set_arch (wanted
, set_arch_auto
);
481 else if (wanted
!= target_architecture
)
483 warning ("%s architecture file may be incompatible with %s target.",
484 wanted
->printable_name
,
485 target_architecture
->printable_name
);
490 /* Called if the user enters ``show architecture'' without an
494 show_architecture (char *args
, int from_tty
)
497 arch
= TARGET_ARCHITECTURE
->printable_name
;
498 if (target_architecture_auto
)
499 printf_filtered ("The target architecture is set automatically (currently %s)\n", arch
);
501 printf_filtered ("The target architecture is assumed to be %s\n", arch
);
505 /* Called if the user enters ``set architecture'' with or without an
509 set_architecture (char *ignore_args
, int from_tty
, struct cmd_list_element
*c
)
511 if (strcmp (set_architecture_string
, "auto") == 0)
513 target_architecture_auto
= 1;
515 else if (GDB_MULTI_ARCH
)
517 struct gdbarch_info info
;
518 memset (&info
, 0, sizeof info
);
519 info
.bfd_arch_info
= bfd_scan_arch (set_architecture_string
);
520 if (info
.bfd_arch_info
== NULL
)
521 internal_error (__FILE__
, __LINE__
,
522 "set_architecture: bfd_scan_arch failed");
523 if (gdbarch_update_p (info
))
524 target_architecture_auto
= 0;
526 printf_unfiltered ("Architecture `%s' not recognized.\n",
527 set_architecture_string
);
531 const struct bfd_arch_info
*arch
532 = bfd_scan_arch (set_architecture_string
);
534 internal_error (__FILE__
, __LINE__
,
535 "set_architecture: bfd_scan_arch failed");
536 set_arch (arch
, set_arch_manual
);
538 show_architecture (NULL
, from_tty
);
541 /* Called if the user enters ``info architecture'' without an argument. */
544 info_architecture (char *args
, int from_tty
)
546 printf_filtered ("Available architectures are:\n");
549 const char **arches
= gdbarch_printable_names ();
551 for (arch
= arches
; *arch
!= NULL
; arch
++)
553 printf_filtered (" %s", *arch
);
559 enum bfd_architecture a
;
560 for (a
= bfd_arch_obscure
+ 1; a
< bfd_arch_last
; a
++)
562 const struct bfd_arch_info
*ap
;
563 for (ap
= bfd_lookup_arch (a
, 0);
567 printf_filtered (" %s", ap
->printable_name
);
572 printf_filtered ("\n");
575 /* Set the dynamic target-system-dependent parameters (architecture,
576 byte-order) using information found in the BFD */
579 set_gdbarch_from_file (bfd
*abfd
)
583 struct gdbarch_info info
;
584 memset (&info
, 0, sizeof info
);
586 if (! gdbarch_update_p (info
))
587 error ("Architecture of file not recognized.\n");
591 set_architecture_from_file (abfd
);
592 set_endian_from_file (abfd
);
596 /* Initialize the current architecture. Update the ``set
597 architecture'' command so that it specifies a list of valid
600 #ifdef DEFAULT_BFD_ARCH
601 extern const bfd_arch_info_type DEFAULT_BFD_ARCH
;
602 static const bfd_arch_info_type
*default_bfd_arch
= &DEFAULT_BFD_ARCH
;
604 static const bfd_arch_info_type
*default_bfd_arch
;
607 #ifdef DEFAULT_BFD_VEC
608 extern const bfd_target DEFAULT_BFD_VEC
;
609 static const bfd_target
*default_bfd_vec
= &DEFAULT_BFD_VEC
;
611 static const bfd_target
*default_bfd_vec
;
615 initialize_current_architecture (void)
617 const char **arches
= gdbarch_printable_names ();
619 /* determine a default architecture and byte order. */
620 struct gdbarch_info info
;
621 memset (&info
, 0, sizeof (info
));
623 /* Find a default architecture. */
624 if (info
.bfd_arch_info
== NULL
625 && default_bfd_arch
!= NULL
)
626 info
.bfd_arch_info
= default_bfd_arch
;
627 if (info
.bfd_arch_info
== NULL
)
629 /* Choose the architecture by taking the first one
631 const char *chosen
= arches
[0];
633 for (arch
= arches
; *arch
!= NULL
; arch
++)
635 if (strcmp (*arch
, chosen
) < 0)
639 internal_error (__FILE__
, __LINE__
,
640 "initialize_current_architecture: No arch");
641 info
.bfd_arch_info
= bfd_scan_arch (chosen
);
642 if (info
.bfd_arch_info
== NULL
)
643 internal_error (__FILE__
, __LINE__
,
644 "initialize_current_architecture: Arch not found");
647 /* take several guesses at a byte order. */
648 /* NB: can't use TARGET_BYTE_ORDER_DEFAULT as its definition is
650 if (info
.byte_order
== 0
651 && default_bfd_vec
!= NULL
)
653 /* Extract BFD's default vector's byte order. */
654 switch (default_bfd_vec
->byteorder
)
657 info
.byte_order
= BIG_ENDIAN
;
659 case BFD_ENDIAN_LITTLE
:
660 info
.byte_order
= LITTLE_ENDIAN
;
666 if (info
.byte_order
== 0)
668 /* look for ``*el-*'' in the target name. */
670 chp
= strchr (target_name
, '-');
672 && chp
- 2 >= target_name
673 && strncmp (chp
- 2, "el", 2) == 0)
674 info
.byte_order
= LITTLE_ENDIAN
;
676 if (info
.byte_order
== 0)
678 /* Wire it to big-endian!!! */
679 info
.byte_order
= BIG_ENDIAN
;
684 if (! gdbarch_update_p (info
))
686 internal_error (__FILE__
, __LINE__
,
687 "initialize_current_architecture: Selection of initial architecture failed");
691 /* Create the ``set architecture'' command appending ``auto'' to the
692 list of architectures. */
694 struct cmd_list_element
*c
;
695 /* Append ``auto''. */
697 for (nr
= 0; arches
[nr
] != NULL
; nr
++);
698 arches
= xrealloc (arches
, sizeof (char*) * (nr
+ 2));
699 arches
[nr
+ 0] = "auto";
700 arches
[nr
+ 1] = NULL
;
701 /* FIXME: add_set_enum_cmd() uses an array of ``char *'' instead
702 of ``const char *''. We just happen to know that the casts are
704 c
= add_set_enum_cmd ("architecture", class_support
,
705 arches
, &set_architecture_string
,
706 "Set architecture of target.",
708 c
->function
.sfunc
= set_architecture
;
709 add_alias_cmd ("processor", "architecture", class_support
, 1, &setlist
);
710 /* Don't use set_from_show - need to print both auto/manual and
712 add_cmd ("architecture", class_support
, show_architecture
,
713 "Show the current target architecture", &showlist
);
714 c
= add_cmd ("architecture", class_support
, info_architecture
,
715 "List supported target architectures", &infolist
);
716 deprecate_cmd (c
, "set architecture");
723 extern initialize_file_ftype _initialize_gdbarch_utils
;
726 _initialize_gdbarch_utils (void)
728 struct cmd_list_element
*c
;
729 c
= add_set_enum_cmd ("endian", class_support
,
730 endian_enum
, &set_endian_string
,
731 "Set endianness of target.",
733 c
->function
.sfunc
= set_endian
;
734 /* Don't use set_from_show - need to print both auto/manual and
736 add_cmd ("endian", class_support
, show_endian
,
737 "Show the current byte-order", &showlist
);