1 /* 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,
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"
34 #include "breakpoint.h"
39 #include "gdbthread.h"
41 #include "symfile.h" /* for overlay functions */
46 #include "floatformat.h"
48 /* Convenience macro for allocting typesafe memory. */
51 #define XMALLOC(TYPE) (TYPE*) xmalloc (sizeof (TYPE))
55 /* Use the program counter to determine the contents and size
56 of a breakpoint instruction. If no target-dependent macro
57 BREAKPOINT_FROM_PC has been defined to implement this function,
58 assume that the breakpoint doesn't depend on the PC, and
59 use the values of the BIG_BREAKPOINT and LITTLE_BREAKPOINT macros.
60 Return a pointer to a string of bytes that encode a breakpoint
61 instruction, stores the length of the string to *lenptr,
62 and optionally adjust the pc to point to the correct memory location
63 for inserting the breakpoint. */
66 legacy_breakpoint_from_pc (CORE_ADDR
* pcptr
, int *lenptr
)
68 /* {BIG_,LITTLE_}BREAKPOINT is the sequence of bytes we insert for a
69 breakpoint. On some machines, breakpoints are handled by the
70 target environment and we don't have to worry about them here. */
72 if (TARGET_BYTE_ORDER
== BIG_ENDIAN
)
74 static unsigned char big_break_insn
[] = BIG_BREAKPOINT
;
75 *lenptr
= sizeof (big_break_insn
);
76 return big_break_insn
;
79 #ifdef LITTLE_BREAKPOINT
80 if (TARGET_BYTE_ORDER
!= BIG_ENDIAN
)
82 static unsigned char little_break_insn
[] = LITTLE_BREAKPOINT
;
83 *lenptr
= sizeof (little_break_insn
);
84 return little_break_insn
;
89 static unsigned char break_insn
[] = BREAKPOINT
;
90 *lenptr
= sizeof (break_insn
);
99 generic_frameless_function_invocation_not (struct frame_info
*fi
)
105 generic_return_value_on_stack_not (struct type
*type
)
111 legacy_register_name (int i
)
113 #ifdef REGISTER_NAMES
114 static char *names
[] = REGISTER_NAMES
;
115 if (i
< 0 || i
>= (sizeof (names
) / sizeof (*names
)))
120 internal_error ("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 ("default_float_format: bad byte order");
188 const struct floatformat
*
189 default_double_format (struct gdbarch
*gdbarch
)
192 int byte_order
= gdbarch_byte_order (gdbarch
);
194 int byte_order
= TARGET_BYTE_ORDER
;
199 return &floatformat_ieee_double_big
;
201 return &floatformat_ieee_double_little
;
203 internal_error ("default_double_format: bad byte order");
207 /* Misc helper functions for targets. */
210 frame_num_args_unknown (struct frame_info
*fi
)
217 generic_register_convertible_not (int num
)
224 default_register_sim_regno (int num
)
231 default_convert_from_func_ptr_addr (CORE_ADDR addr
)
237 no_op_reg_to_regnum (int reg
)
242 /* For use by frame_args_address and frame_locals_address. */
244 default_frame_address (struct frame_info
*fi
)
249 /* Functions to manipulate the endianness of the target. */
251 #ifdef TARGET_BYTE_ORDER_SELECTABLE
252 /* compat - Catch old targets that expect a selectable byte-order to
253 default to BIG_ENDIAN */
254 #ifndef TARGET_BYTE_ORDER_DEFAULT
255 #define TARGET_BYTE_ORDER_DEFAULT BIG_ENDIAN
258 #if !TARGET_BYTE_ORDER_SELECTABLE_P
259 #ifndef TARGET_BYTE_ORDER_DEFAULT
260 /* compat - Catch old non byte-order selectable targets that do not
261 define TARGET_BYTE_ORDER_DEFAULT and instead expect
262 TARGET_BYTE_ORDER to be used as the default. For targets that
263 defined neither TARGET_BYTE_ORDER nor TARGET_BYTE_ORDER_DEFAULT the
264 below will get a strange compiler warning. */
265 #define TARGET_BYTE_ORDER_DEFAULT TARGET_BYTE_ORDER
268 #ifndef TARGET_BYTE_ORDER_DEFAULT
269 #define TARGET_BYTE_ORDER_DEFAULT BIG_ENDIAN /* arbitrary */
271 /* ``target_byte_order'' is only used when non- multi-arch.
272 Multi-arch targets obtain the current byte order using
273 TARGET_BYTE_ORDER which is controlled by gdbarch.*. */
274 int target_byte_order
= TARGET_BYTE_ORDER_DEFAULT
;
275 int target_byte_order_auto
= 1;
277 static const char endian_big
[] = "big";
278 static const char endian_little
[] = "little";
279 static const char endian_auto
[] = "auto";
280 static const char *endian_enum
[] =
287 static const char *set_endian_string
;
289 /* Called by ``show endian''. */
292 show_endian (char *args
, int from_tty
)
294 if (TARGET_BYTE_ORDER_AUTO
)
295 printf_unfiltered ("The target endianness is set automatically (currently %s endian)\n",
296 (TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little"));
298 printf_unfiltered ("The target is assumed to be %s endian\n",
299 (TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little"));
303 set_endian (char *ignore_args
, int from_tty
, struct cmd_list_element
*c
)
305 if (!TARGET_BYTE_ORDER_SELECTABLE_P
)
307 printf_unfiltered ("Byte order is not selectable.");
309 else if (set_endian_string
== endian_auto
)
311 target_byte_order_auto
= 1;
313 else if (set_endian_string
== endian_little
)
315 target_byte_order_auto
= 0;
318 struct gdbarch_info info
;
319 memset (&info
, 0, sizeof info
);
320 info
.byte_order
= LITTLE_ENDIAN
;
321 if (! gdbarch_update_p (info
))
323 printf_unfiltered ("Little endian target not supported by GDB\n");
328 target_byte_order
= LITTLE_ENDIAN
;
331 else if (set_endian_string
== endian_big
)
333 target_byte_order_auto
= 0;
336 struct gdbarch_info info
;
337 memset (&info
, 0, sizeof info
);
338 info
.byte_order
= BIG_ENDIAN
;
339 if (! gdbarch_update_p (info
))
341 printf_unfiltered ("Big endian target not supported by GDB\n");
346 target_byte_order
= BIG_ENDIAN
;
350 internal_error ("set_endian: bad value");
351 show_endian (NULL
, from_tty
);
354 /* Set the endianness from a BFD. */
357 set_endian_from_file (bfd
*abfd
)
360 internal_error ("set_endian_from_file: not for multi-arch");
361 if (TARGET_BYTE_ORDER_SELECTABLE_P
)
365 if (bfd_big_endian (abfd
))
368 want
= LITTLE_ENDIAN
;
369 if (TARGET_BYTE_ORDER_AUTO
)
370 target_byte_order
= want
;
371 else if (TARGET_BYTE_ORDER
!= want
)
372 warning ("%s endian file does not match %s endian target.",
373 want
== BIG_ENDIAN
? "big" : "little",
374 TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
378 if (bfd_big_endian (abfd
)
379 ? TARGET_BYTE_ORDER
!= BIG_ENDIAN
380 : TARGET_BYTE_ORDER
== BIG_ENDIAN
)
381 warning ("%s endian file does not match %s endian target.",
382 bfd_big_endian (abfd
) ? "big" : "little",
383 TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
388 /* Functions to manipulate the architecture of the target */
390 enum set_arch
{ set_arch_auto
, set_arch_manual
};
392 int target_architecture_auto
= 1;
394 const char *set_architecture_string
;
396 /* Old way of changing the current architecture. */
398 extern const struct bfd_arch_info bfd_default_arch_struct
;
399 const struct bfd_arch_info
*target_architecture
= &bfd_default_arch_struct
;
400 int (*target_architecture_hook
) (const struct bfd_arch_info
*ap
);
403 arch_ok (const struct bfd_arch_info
*arch
)
406 internal_error ("arch_ok: not multi-arched");
407 /* Should be performing the more basic check that the binary is
408 compatible with GDB. */
409 /* Check with the target that the architecture is valid. */
410 return (target_architecture_hook
== NULL
411 || target_architecture_hook (arch
));
415 set_arch (const struct bfd_arch_info
*arch
,
419 internal_error ("set_arch: not multi-arched");
424 warning ("Target may not support %s architecture",
425 arch
->printable_name
);
426 target_architecture
= arch
;
428 case set_arch_manual
:
431 printf_unfiltered ("Target does not support `%s' architecture.\n",
432 arch
->printable_name
);
436 target_architecture_auto
= 0;
437 target_architecture
= arch
;
442 gdbarch_dump (current_gdbarch
, gdb_stdlog
);
445 /* Set the architecture from arch/machine (deprecated) */
448 set_architecture_from_arch_mach (enum bfd_architecture arch
,
451 const struct bfd_arch_info
*wanted
= bfd_lookup_arch (arch
, mach
);
453 internal_error ("set_architecture_from_arch_mach: not multi-arched");
455 set_arch (wanted
, set_arch_manual
);
457 internal_error ("gdbarch: hardwired architecture/machine not recognized");
460 /* Set the architecture from a BFD (deprecated) */
463 set_architecture_from_file (bfd
*abfd
)
465 const struct bfd_arch_info
*wanted
= bfd_get_arch_info (abfd
);
467 internal_error ("set_architecture_from_file: not multi-arched");
468 if (target_architecture_auto
)
470 set_arch (wanted
, set_arch_auto
);
472 else if (wanted
!= target_architecture
)
474 warning ("%s architecture file may be incompatible with %s target.",
475 wanted
->printable_name
,
476 target_architecture
->printable_name
);
481 /* Called if the user enters ``show architecture'' without an
485 show_architecture (char *args
, int from_tty
)
488 arch
= TARGET_ARCHITECTURE
->printable_name
;
489 if (target_architecture_auto
)
490 printf_filtered ("The target architecture is set automatically (currently %s)\n", arch
);
492 printf_filtered ("The target architecture is assumed to be %s\n", arch
);
496 /* Called if the user enters ``set architecture'' with or without an
500 set_architecture (char *ignore_args
, int from_tty
, struct cmd_list_element
*c
)
502 if (strcmp (set_architecture_string
, "auto") == 0)
504 target_architecture_auto
= 1;
506 else if (GDB_MULTI_ARCH
)
508 struct gdbarch_info info
;
509 memset (&info
, 0, sizeof info
);
510 info
.bfd_arch_info
= bfd_scan_arch (set_architecture_string
);
511 if (info
.bfd_arch_info
== NULL
)
512 internal_error ("set_architecture: bfd_scan_arch failed");
513 if (gdbarch_update_p (info
))
514 target_architecture_auto
= 0;
516 printf_unfiltered ("Architecture `%s' not recognized.\n",
517 set_architecture_string
);
521 const struct bfd_arch_info
*arch
522 = bfd_scan_arch (set_architecture_string
);
524 internal_error ("set_architecture: bfd_scan_arch failed");
525 set_arch (arch
, set_arch_manual
);
527 show_architecture (NULL
, from_tty
);
530 /* Called if the user enters ``info architecture'' without an argument. */
533 info_architecture (char *args
, int from_tty
)
535 printf_filtered ("Available architectures are:\n");
538 const char **arches
= gdbarch_printable_names ();
540 for (arch
= arches
; *arch
!= NULL
; arch
++)
542 printf_filtered (" %s", *arch
);
548 enum bfd_architecture a
;
549 for (a
= bfd_arch_obscure
+ 1; a
< bfd_arch_last
; a
++)
551 const struct bfd_arch_info
*ap
;
552 for (ap
= bfd_lookup_arch (a
, 0);
556 printf_filtered (" %s", ap
->printable_name
);
561 printf_filtered ("\n");
564 /* Set the dynamic target-system-dependent parameters (architecture,
565 byte-order) using information found in the BFD */
568 set_gdbarch_from_file (bfd
*abfd
)
572 struct gdbarch_info info
;
573 memset (&info
, 0, sizeof info
);
575 if (! gdbarch_update_p (info
))
576 error ("Architecture of file not recognized.\n");
580 set_architecture_from_file (abfd
);
581 set_endian_from_file (abfd
);
585 /* Initialize the current architecture. Update the ``set
586 architecture'' command so that it specifies a list of valid
589 #ifdef DEFAULT_BFD_ARCH
590 extern const bfd_arch_info_type DEFAULT_BFD_ARCH
;
591 static const bfd_arch_info_type
*default_bfd_arch
= &DEFAULT_BFD_ARCH
;
593 static const bfd_arch_info_type
*default_bfd_arch
;
596 #ifdef DEFAULT_BFD_VEC
597 extern const bfd_target DEFAULT_BFD_VEC
;
598 static const bfd_target
*default_bfd_vec
= &DEFAULT_BFD_VEC
;
600 static const bfd_target
*default_bfd_vec
;
604 initialize_current_architecture (void)
606 const char **arches
= gdbarch_printable_names ();
608 /* determine a default architecture and byte order. */
609 struct gdbarch_info info
;
610 memset (&info
, 0, sizeof (info
));
612 /* Find a default architecture. */
613 if (info
.bfd_arch_info
== NULL
614 && default_bfd_arch
!= NULL
)
615 info
.bfd_arch_info
= default_bfd_arch
;
616 if (info
.bfd_arch_info
== NULL
)
618 /* Choose the architecture by taking the first one
620 const char *chosen
= arches
[0];
622 for (arch
= arches
; *arch
!= NULL
; arch
++)
624 if (strcmp (*arch
, chosen
) < 0)
628 internal_error ("initialize_current_architecture: No arch");
629 info
.bfd_arch_info
= bfd_scan_arch (chosen
);
630 if (info
.bfd_arch_info
== NULL
)
631 internal_error ("initialize_current_architecture: Arch not found");
634 /* take several guesses at a byte order. */
635 /* NB: can't use TARGET_BYTE_ORDER_DEFAULT as its definition is
637 if (info
.byte_order
== 0
638 && default_bfd_vec
!= NULL
)
640 /* Extract BFD's default vector's byte order. */
641 switch (default_bfd_vec
->byteorder
)
644 info
.byte_order
= BIG_ENDIAN
;
646 case BFD_ENDIAN_LITTLE
:
647 info
.byte_order
= LITTLE_ENDIAN
;
653 if (info
.byte_order
== 0)
655 /* look for ``*el-*'' in the target name. */
657 chp
= strchr (target_name
, '-');
659 && chp
- 2 >= target_name
660 && strncmp (chp
- 2, "el", 2) == 0)
661 info
.byte_order
= LITTLE_ENDIAN
;
663 if (info
.byte_order
== 0)
665 /* Wire it to big-endian!!! */
666 info
.byte_order
= BIG_ENDIAN
;
671 if (! gdbarch_update_p (info
))
673 internal_error ("initialize_current_architecture: Selection of initial architecture failed");
677 /* Create the ``set architecture'' command appending ``auto'' to the
678 list of architectures. */
680 struct cmd_list_element
*c
;
681 /* Append ``auto''. */
683 for (nr
= 0; arches
[nr
] != NULL
; nr
++);
684 arches
= xrealloc (arches
, sizeof (char*) * (nr
+ 2));
685 arches
[nr
+ 0] = "auto";
686 arches
[nr
+ 1] = NULL
;
687 /* FIXME: add_set_enum_cmd() uses an array of ``char *'' instead
688 of ``const char *''. We just happen to know that the casts are
690 c
= add_set_enum_cmd ("architecture", class_support
,
691 arches
, &set_architecture_string
,
692 "Set architecture of target.",
694 c
->function
.sfunc
= set_architecture
;
695 add_alias_cmd ("processor", "architecture", class_support
, 1, &setlist
);
696 /* Don't use set_from_show - need to print both auto/manual and
698 add_cmd ("architecture", class_support
, show_architecture
,
699 "Show the current target architecture", &showlist
);
700 c
= add_cmd ("architecture", class_support
, info_architecture
,
701 "List supported target architectures", &infolist
);
702 deprecate_cmd (c
, "set architecture");
709 extern initialize_file_ftype _initialize_gdbarch_utils
;
712 _initialize_gdbarch_utils (void)
714 struct cmd_list_element
*c
;
715 c
= add_set_enum_cmd ("endian", class_support
,
716 endian_enum
, &set_endian_string
,
717 "Set endianness of target.",
719 c
->function
.sfunc
= set_endian
;
720 /* Don't use set_from_show - need to print both auto/manual and
722 add_cmd ("endian", class_support
, show_endian
,
723 "Show the current byte-order", &showlist
);