mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-15 04:31:49 +08:00
11041102f2
* avr-dis.c: Include libiberty.h (for xmalloc). (struct avr_opcodes_s): Remove 'bin_mask' field (it's automatically computed in the init routine). (AVR_INSN): No longer provide bin_mask field in initializer. (avr_opcodes_s): Declare as const. (print_insn_avr): Store the bin_mask field in a separate table (allocated with xmalloc); iterate through it at the same time as we iterate through the opcodes.
372 lines
7.8 KiB
C
372 lines
7.8 KiB
C
/* Disassemble AVR instructions.
|
|
Copyright 1999, 2000 Free Software Foundation, Inc.
|
|
|
|
Contributed by Denis Chertykov <denisc@overta.ru>
|
|
|
|
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
|
|
|
|
#include <assert.h>
|
|
#include "sysdep.h"
|
|
#include "dis-asm.h"
|
|
#include "opintl.h"
|
|
#include "libiberty.h"
|
|
|
|
struct avr_opcodes_s
|
|
{
|
|
char *name;
|
|
char *constraints;
|
|
char *opcode;
|
|
int insn_size; /* in words */
|
|
int isa;
|
|
unsigned int bin_opcode;
|
|
};
|
|
|
|
#define AVR_INSN(NAME, CONSTR, OPCODE, SIZE, ISA, BIN) \
|
|
{#NAME, CONSTR, OPCODE, SIZE, ISA, BIN},
|
|
|
|
const struct avr_opcodes_s avr_opcodes[] =
|
|
{
|
|
#include "opcode/avr.h"
|
|
{NULL, NULL, NULL, 0, 0, 0}
|
|
};
|
|
|
|
static int avr_operand PARAMS ((unsigned int, unsigned int,
|
|
unsigned int, int, char *, char *, int));
|
|
|
|
static int
|
|
avr_operand (insn, insn2, pc, constraint, buf, comment, regs)
|
|
unsigned int insn;
|
|
unsigned int insn2;
|
|
unsigned int pc;
|
|
int constraint;
|
|
char *buf;
|
|
char *comment;
|
|
int regs;
|
|
{
|
|
int ok = 1;
|
|
|
|
switch (constraint)
|
|
{
|
|
/* Any register operand. */
|
|
case 'r':
|
|
if (regs)
|
|
insn = (insn & 0xf) | ((insn & 0x0200) >> 5); /* source register */
|
|
else
|
|
insn = (insn & 0x01f0) >> 4; /* destination register */
|
|
|
|
sprintf (buf, "r%d", insn);
|
|
break;
|
|
|
|
case 'd':
|
|
if (regs)
|
|
sprintf (buf, "r%d", 16 + (insn & 0xf));
|
|
else
|
|
sprintf (buf, "r%d", 16 + ((insn & 0xf0) >> 4));
|
|
break;
|
|
|
|
case 'w':
|
|
sprintf (buf, "r%d", 24 + ((insn & 0x30) >> 3));
|
|
break;
|
|
|
|
case 'a':
|
|
if (regs)
|
|
sprintf (buf, "r%d", 16 + (insn & 7));
|
|
else
|
|
sprintf (buf, "r%d", 16 + ((insn >> 4) & 7));
|
|
break;
|
|
|
|
case 'v':
|
|
if (regs)
|
|
sprintf (buf, "r%d", (insn & 0xf) * 2);
|
|
else
|
|
sprintf (buf, "r%d", ((insn & 0xf0) >> 3));
|
|
break;
|
|
|
|
case 'e':
|
|
{
|
|
char *xyz;
|
|
|
|
switch (insn & 0x100f)
|
|
{
|
|
case 0x0000: xyz = "Z"; break;
|
|
case 0x1001: xyz = "Z+"; break;
|
|
case 0x1002: xyz = "-Z"; break;
|
|
case 0x0008: xyz = "Y"; break;
|
|
case 0x1009: xyz = "Y+"; break;
|
|
case 0x100a: xyz = "-Y"; break;
|
|
case 0x100c: xyz = "X"; break;
|
|
case 0x100d: xyz = "X+"; break;
|
|
case 0x100e: xyz = "-X"; break;
|
|
default: xyz = "??"; ok = 0;
|
|
}
|
|
sprintf (buf, xyz);
|
|
|
|
if (AVR_UNDEF_P (insn))
|
|
sprintf (comment, _("undefined"));
|
|
}
|
|
break;
|
|
|
|
case 'z':
|
|
*buf++ = 'Z';
|
|
if (insn & 0x1)
|
|
*buf++ = '+';
|
|
*buf = '\0';
|
|
if (AVR_UNDEF_P (insn))
|
|
sprintf (comment, _("undefined"));
|
|
break;
|
|
|
|
case 'b':
|
|
{
|
|
unsigned int x;
|
|
|
|
x = (insn & 7);
|
|
x |= (insn >> 7) & (3 << 3);
|
|
x |= (insn >> 8) & (1 << 5);
|
|
|
|
if (insn & 0x8)
|
|
*buf++ = 'Y';
|
|
else
|
|
*buf++ = 'Z';
|
|
sprintf (buf, "+%d", x);
|
|
sprintf (comment, "0x%02x", x);
|
|
}
|
|
break;
|
|
|
|
case 'h':
|
|
sprintf (buf, "0x%x",
|
|
((((insn & 1) | ((insn & 0x1f0) >> 3)) << 16) | insn2) * 2);
|
|
break;
|
|
|
|
case 'L':
|
|
{
|
|
int rel_addr = (((insn & 0xfff) ^ 0x800) - 0x800) * 2;
|
|
sprintf (buf, ".%+-8d", rel_addr);
|
|
sprintf (comment, "0x%x", pc + 2 + rel_addr);
|
|
}
|
|
break;
|
|
|
|
case 'l':
|
|
{
|
|
int rel_addr = ((((insn >> 3) & 0x7f) ^ 0x40) - 0x40) * 2;
|
|
sprintf (buf, ".%+-8d", rel_addr);
|
|
sprintf (comment, "0x%x", pc + 2 + rel_addr);
|
|
}
|
|
break;
|
|
|
|
case 'i':
|
|
sprintf (buf, "0x%04X", insn2);
|
|
break;
|
|
|
|
case 'M':
|
|
sprintf (buf, "0x%02X", ((insn & 0xf00) >> 4) | (insn & 0xf));
|
|
sprintf (comment, "%d", ((insn & 0xf00) >> 4) | (insn & 0xf));
|
|
break;
|
|
|
|
case 'n':
|
|
sprintf (buf, "??");
|
|
fprintf (stderr, _("Internal disassembler error"));
|
|
ok = 0;
|
|
break;
|
|
|
|
case 'K':
|
|
{
|
|
unsigned int x;
|
|
|
|
x = (insn & 0xf) | ((insn >> 2) & 0x30);
|
|
sprintf (buf, "0x%02x", x);
|
|
sprintf (comment, "%d", x);
|
|
}
|
|
break;
|
|
|
|
case 's':
|
|
sprintf (buf, "%d", insn & 7);
|
|
break;
|
|
|
|
case 'S':
|
|
sprintf (buf, "%d", (insn >> 4) & 7);
|
|
break;
|
|
|
|
case 'P':
|
|
{
|
|
unsigned int x;
|
|
x = (insn & 0xf);
|
|
x |= (insn >> 5) & 0x30;
|
|
sprintf (buf, "0x%02x", x);
|
|
sprintf (comment, "%d", x);
|
|
}
|
|
break;
|
|
|
|
case 'p':
|
|
{
|
|
unsigned int x;
|
|
|
|
x = (insn >> 3) & 0x1f;
|
|
sprintf (buf, "0x%02x", x);
|
|
sprintf (comment, "%d", x);
|
|
}
|
|
break;
|
|
|
|
case '?':
|
|
*buf = '\0';
|
|
break;
|
|
|
|
default:
|
|
sprintf (buf, "??");
|
|
fprintf (stderr, _("unknown constraint `%c'"), constraint);
|
|
ok = 0;
|
|
}
|
|
|
|
return ok;
|
|
}
|
|
|
|
static unsigned short avrdis_opcode PARAMS ((bfd_vma, disassemble_info *));
|
|
|
|
static unsigned short
|
|
avrdis_opcode (addr, info)
|
|
bfd_vma addr;
|
|
disassemble_info *info;
|
|
{
|
|
bfd_byte buffer[2];
|
|
int status;
|
|
status = info->read_memory_func(addr, buffer, 2, info);
|
|
if (status != 0)
|
|
{
|
|
info->memory_error_func(status, addr, info);
|
|
return -1;
|
|
}
|
|
return bfd_getl16 (buffer);
|
|
}
|
|
|
|
|
|
int
|
|
print_insn_avr(addr, info)
|
|
bfd_vma addr;
|
|
disassemble_info *info;
|
|
{
|
|
unsigned int insn, insn2;
|
|
const struct avr_opcodes_s *opcode;
|
|
static unsigned int *maskptr;
|
|
void *stream = info->stream;
|
|
fprintf_ftype prin = info->fprintf_func;
|
|
static unsigned int *avr_bin_masks;
|
|
static int initialized;
|
|
int cmd_len = 2;
|
|
int ok = 0;
|
|
char op1[20], op2[20], comment1[40], comment2[40];
|
|
|
|
if (!initialized)
|
|
{
|
|
unsigned int nopcodes;
|
|
|
|
nopcodes = sizeof (avr_opcodes) / sizeof (struct avr_opcodes_s);
|
|
|
|
avr_bin_masks = (unsigned int *)
|
|
xmalloc (nopcodes * sizeof (unsigned int));
|
|
|
|
for (opcode = avr_opcodes, maskptr = avr_bin_masks;
|
|
opcode->name;
|
|
opcode++, maskptr++)
|
|
{
|
|
char * s;
|
|
unsigned int bin = 0;
|
|
unsigned int mask = 0;
|
|
|
|
for (s = opcode->opcode; *s; ++s)
|
|
{
|
|
bin <<= 1;
|
|
mask <<= 1;
|
|
bin |= (*s == '1');
|
|
mask |= (*s == '1' || *s == '0');
|
|
}
|
|
assert (s - opcode->opcode == 16);
|
|
assert (opcode->bin_opcode == bin);
|
|
*maskptr = mask;
|
|
}
|
|
|
|
initialized = 1;
|
|
}
|
|
|
|
insn = avrdis_opcode (addr, info);
|
|
|
|
for (opcode = avr_opcodes, maskptr = avr_bin_masks;
|
|
opcode->name;
|
|
opcode++, maskptr++)
|
|
{
|
|
if ((insn & *maskptr) == opcode->bin_opcode)
|
|
break;
|
|
}
|
|
|
|
/* Special case: disassemble `ldd r,b+0' as `ld r,b', and
|
|
`std b+0,r' as `st b,r' (next entry in the table). */
|
|
|
|
if (AVR_DISP0_P (insn))
|
|
opcode++;
|
|
|
|
op1[0] = 0;
|
|
op2[0] = 0;
|
|
comment1[0] = 0;
|
|
comment2[0] = 0;
|
|
|
|
if (opcode->name)
|
|
{
|
|
char *op = opcode->constraints;
|
|
|
|
insn2 = 0;
|
|
ok = 1;
|
|
|
|
if (opcode->insn_size > 1)
|
|
{
|
|
insn2 = avrdis_opcode (addr + 2, info);
|
|
cmd_len = 4;
|
|
}
|
|
|
|
if (*op && *op != '?')
|
|
{
|
|
int regs = REGISTER_P (*op);
|
|
|
|
ok = avr_operand (insn, insn2, addr, *op, op1, comment1, 0);
|
|
|
|
if (ok && *(++op) == ',')
|
|
ok = avr_operand (insn, insn2, addr, *(++op), op2,
|
|
*comment1 ? comment2 : comment1, regs);
|
|
}
|
|
}
|
|
|
|
if (!ok)
|
|
{
|
|
/* Unknown opcode, or invalid combination of operands. */
|
|
sprintf (op1, "0x%04x", insn);
|
|
op2[0] = 0;
|
|
sprintf (comment1, "????");
|
|
comment2[0] = 0;
|
|
}
|
|
|
|
(*prin) (stream, "%s", ok ? opcode->name : ".word");
|
|
|
|
if (*op1)
|
|
(*prin) (stream, "\t%s", op1);
|
|
|
|
if (*op2)
|
|
(*prin) (stream, ", %s", op2);
|
|
|
|
if (*comment1)
|
|
(*prin) (stream, "\t; %s", comment1);
|
|
|
|
if (*comment2)
|
|
(*prin) (stream, " %s", comment2);
|
|
|
|
return cmd_len;
|
|
}
|