-/* Print m68k instructions for GDB, the GNU debugger.
- Copyright (C) 1986, 1987, 1989 Free Software Foundation, Inc.
+/* Print Motorola 68k instructions for GDB, the GNU debugger.
+ Copyright 1986, 1987, 1989, 1991 Free Software Foundation, Inc.
This file is part of GDB.
-GDB is free software; you can redistribute it and/or modify
+This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 1, or (at your option)
-any later version.
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
-GDB is distributed in the hope that it will be useful,
+This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
-along with GDB; see the file COPYING. If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+along with this program; if not, write to the Free Software
+Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include <stdio.h>
-#include <setjmp.h>
-#include <signal.h>
-
#include "defs.h"
-#include "param.h"
#include "symtab.h"
-#include "opcode.h"
+#include "m68k-opcode.h"
+#include "gdbcore.h"
/* 68k instructions are never longer than this many bytes. */
#define MAXLEN 22
case 'Q':
val = fetch_arg (buffer, place, 3);
- if (val == 0) val = 8;
+ /* 0 means 8, except for the bkpt instruction... */
+ if (val == 0 && d[1] != 's')
+ val = 8;
fprintf_filtered (stream, "#%d", val);
break;
case 'B':
if (place == 'b')
val = NEXTBYTE (p);
- else if (place == 'w')
+ else if (place == 'B')
+ val = buffer[1];
+ else if (place == 'w' || place == 'W')
val = NEXTWORD (p);
- else if (place == 'l')
+ else if (place == 'l' || place == 'L')
val = NEXTLONG (p);
else if (place == 'g')
{
else
fprintf_filtered (stream, "%d(%s)", disp, reg_names[regno]);
}
-\f
-/* Nonzero if the host system has a 68881 (or compatible)
- floating-point unit. This does *not* indicate whether the target
- system has a co-processor, just whether the host system does.
- There might be a difference in the case of remote debugging. */
-static int have_fpu = 1;
-
-/* This is not part of insn printing, but it is machine-specific,
- so this is a convenient place to put it.
-
- Convert a 68881 extended float to a double.
- FROM is the address of the extended float.
- Store the double in *TO. */
-
-convert_from_68881 (from, to)
- char *from;
- double *to;
-{
- if (!have_fpu)
- {
- *to = 0.0;
- return;
- }
- else
- {
-#ifdef HPUX_ASM
- asm ("mov.l 8(%a6),%a0");
- asm ("mov.l 12(%a6),%a1");
- asm ("fmove.x (%a0),%fp0");
- asm ("fmove.d %fp0,(%a1)");
-#else /* not HPUX_ASM */
-#if 0
- asm ("movl a6@(8),a0");
- asm ("movl a6@(12),a1");
- asm ("fmovex a0@,fp0");
- asm ("fmoved fp0,a1@");
-#else
- /* Hand-assemble those insns since some assemblers lose
- and some have different syntax. */
- asm (".word 020156");
- asm (".word 8");
- asm (".word 021156");
- asm (".word 12");
- asm (".long 0xf2104800");
- asm (".long 0xf2117400");
-#endif
-#endif /* not HPUX_ASM */
- }
-}
-
-/* The converse: convert the double *FROM to an extended float
- and store where TO points. */
-
-convert_to_68881 (from, to)
- double *from;
- char *to;
-{
- if (!have_fpu)
- return;
- else
- {
-#ifdef HPUX_ASM
- asm ("mov.l 8(%a6),%a0");
- asm ("mov.l 12(%a6),%a1");
- asm ("fmove.d (%a0),%fp0");
- asm ("fmove.x %fp0,(%a1)");
-#else /* not HPUX_ASM */
-#if 0
- asm ("movl a6@(8),a0");
- asm ("movl a6@(12),a1");
- asm ("fmoved a0@,fp0");
- asm ("fmovex fp0,a1@");
-#else
- /* Hand-assemble those insns since some assemblers lose. */
- asm (".word 020156");
- asm (".word 8");
- asm (".word 021156");
- asm (".word 12");
- asm (".long 0xf2105400");
- asm (".long 0xf2116800");
-#endif
-#endif /* not HPUX_ASM */
- }
-}
-
-static jmp_buf fpu_check;
-
-void
-sigemt()
-{
- have_fpu = 0;
- longjmp (fpu_check, 1);
-}
-
-void
-_initialize_pinsn()
-{
- /* Want to figure out if we've got a coprocessor. The idea is to catch the
- signal that gets delivered if no coprocessor is around (SIGEMT) then
- execute a coprocessor instruction and see what happens. have_fpu is set
- to zero if the EMT signal arrives. Else it is left at 1. */
- /* If this turns out not to be portable to all 68k machines, we'll
- have to move it to the dep files. */
- void (*emthandler) ();
-
- emthandler = (void (*) ()) signal (SIGEMT, sigemt);
- if (!setjmp (fpu_check))
- {
-#if defined(HPUX_ASM)
- asm (" long 0xf2000600"); /* fmovel fp0, d0 */
-#else
- asm(".long 0xf2000600"); /* fmovel fp0, d0 */
-#endif
- }
- signal(SIGEMT, emthandler);
-}
projects / deliverable / binutils-gdb.git / blobdiff