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/* Print mips instructions for GDB, the GNU debugger, or for objdump.
Copyright 1989, 1991, 1992 Free Software Foundation, Inc.
Contributed by Nobuyuki Hikichi(hikichi@sra.co.jp).
This file is part of GDB.
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 2 of the License, or
(at your option) any later version.
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 this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "sysdep.h"
#include <stdio.h>
#include "bfd.h"
#include "opcode/mips.h"
/* FIXME: we need direct access to the swapping functions. */
#include "libbfd.h"
/* We use bfd_vma in a couple of places where gdb expects CORE_ADDR. */
#ifdef HOST_64_BIT
#error FIXME: bfd_vma will not match gdb expectations
#endif
/* This file is used both by gdb and by objdump. A program which
wants to use this code must provide an external function
print_address. */
extern int print_address PARAMS ((bfd_vma, FILE *));
/* Mips instructions are never longer than this many bytes. */
#define MAXLEN 4
/* Number of elements in the opcode table. */
#define NOPCODES (sizeof mips_opcodes / sizeof mips_opcodes[0])
/* FIXME: This should be shared with gdb somehow. */
#define REGISTER_NAMES \
{ "zero", "at", "v0", "v1", "a0", "a1", "a2", "a3", \
"t0", "t1", "t2", "t3", "t4", "t5", "t6", "t7", \
"s0", "s1", "s2", "s3", "s4", "s5", "s6", "s7", \
"t8", "t9", "k0", "k1", "gp", "sp", "s8", "ra", \
"sr", "lo", "hi", "bad", "cause","pc", \
"f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \
"f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", \
"f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23",\
"f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31",\
"fsr", "fir", "fp", "inx", "rand", "tlblo","ctxt", "tlbhi",\
"epc", "prid"\
}
static CONST char * CONST reg_names[] = REGISTER_NAMES;
/* subroutine */
static unsigned char *
print_insn_arg (d, l, stream, pc)
char *d;
register unsigned long int *l;
FILE *stream;
bfd_vma pc;
{
switch (*d)
{
case ',':
case '(':
case ')':
fputc (*d, stream);
break;
case 's':
fprintf (stream, "$%s", reg_names[((struct op_i_fmt *) l)->rs]);
break;
case 't':
fprintf (stream, "$%s", reg_names[((struct op_i_fmt *) l)->rt]);
break;
case 'i':
fprintf (stream, "%d", ((struct op_i_fmt *) l)->immediate);
break;
case 'j': /* same as i, but sign-extended */
fprintf (stream, "%d", ((struct op_b_fmt *) l)->delta);
break;
case 'a':
print_address ((pc & 0xF0000000) | (((struct op_j_fmt *)l)->target << 2),
stream);
break;
case 'b':
print_address ((((struct op_b_fmt *) l)->delta << 2) + pc + 4, stream);
break;
case 'd':
fprintf (stream, "$%s", reg_names[((struct op_r_fmt *) l)->rd]);
break;
case 'h':
fprintf (stream, "0x%x", ((struct op_r_fmt *) l)->shamt);
break;
case 'B':
fprintf (stream, "0x%x", ((struct op_brk_fmt *) l)->code);
break;
case 'S':
fprintf (stream, "$f%d", ((struct fop_r_fmt *) l)->fs);
break;
case 'T':
fprintf (stream, "$f%d", ((struct fop_r_fmt *) l)->ft);
break;
case 'D':
fprintf (stream, "$f%d", ((struct fop_r_fmt *) l)->fd);
break;
default:
fprintf (stream, "# internal error, undefined modifier(%c)", *d);
break;
}
}
/* Print the mips instruction at address MEMADDR in debugged memory,
on STREAM. Returns length of the instruction, in bytes, which is
always 4. BIGENDIAN must be 1 if this is big-endian code, 0 if
this is little-endian code. */
int
print_insn_mips (memaddr, buffer, stream, bigendian)
bfd_vma memaddr;
bfd_byte *buffer;
FILE *stream;
int bigendian;
{
register int i;
register char *d;
unsigned long int l;
/* FIXME: can't we export these functions from bfd? */
if (bigendian)
l = _do_getb32 (buffer);
else
l = _do_getl32 (buffer);
for (i = 0; i < NOPCODES; i++)
{
register unsigned int opcode = mips_opcodes[i].opcode;
register unsigned int match = mips_opcodes[i].match;
if ((l & match) == opcode)
break;
}
/* Handle undefined instructions. */
if (i == NOPCODES)
{
fprintf (stream, "0x%x",l);
return 4;
}
fprintf (stream, "%s", mips_opcodes[i].name);
if (!(d = mips_opcodes[i].args))
return 4;
fputc (' ', stream);
while (*d)
print_insn_arg (d++, &l, stream, memaddr);
return 4;
}
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