382 lines
11 KiB
C
382 lines
11 KiB
C
|
/* Disassemble V850 instructions.
|
||
|
|
Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
|
||
|
|
|
||
|
|
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 <stdio.h>
|
||
|
|
|
||
|
|
#include "ansidecl.h"
|
||
|
|
#include "opcode/v850.h"
|
||
|
|
#include "dis-asm.h"
|
||
|
|
#include "opintl.h"
|
||
|
|
|
||
|
|
static const char *const v850_reg_names[] =
|
||
|
|
{ "r0", "r1", "r2", "sp", "gp", "r5", "r6", "r7",
|
||
|
|
"r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
|
||
|
|
"r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
|
||
|
|
"r24", "r25", "r26", "r27", "r28", "r29", "ep", "lp" };
|
||
|
|
|
||
|
|
static const char *const v850_sreg_names[] =
|
||
|
|
{ "eipc", "eipsw", "fepc", "fepsw", "ecr", "psw", "sr6", "sr7",
|
||
|
|
"sr8", "sr9", "sr10", "sr11", "sr12", "sr13", "sr14", "sr15",
|
||
|
|
"ctpc", "ctpsw", "dbpc", "dbpsw", "ctbp", "sr21", "sr22", "sr23",
|
||
|
|
"sr24", "sr25", "sr26", "sr27", "sr28", "sr29", "sr30", "sr31",
|
||
|
|
"sr16", "sr17", "sr18", "sr19", "sr20", "sr21", "sr22", "sr23",
|
||
|
|
"sr24", "sr25", "sr26", "sr27", "sr28", "sr29", "sr30", "sr31" };
|
||
|
|
|
||
|
|
static const char *const v850_cc_names[] =
|
||
|
|
{ "v", "c/l", "z", "nh", "s/n", "t", "lt", "le",
|
||
|
|
"nv", "nc/nl", "nz", "h", "ns/p", "sa", "ge", "gt" };
|
||
|
|
|
||
|
|
static int
|
||
|
|
disassemble (memaddr, info, insn)
|
||
|
|
bfd_vma memaddr;
|
||
|
|
struct disassemble_info *info;
|
||
|
|
unsigned long insn;
|
||
|
|
{
|
||
|
|
struct v850_opcode * op = (struct v850_opcode *)v850_opcodes;
|
||
|
|
const struct v850_operand * operand;
|
||
|
|
int match = 0;
|
||
|
|
int short_op = ((insn & 0x0600) != 0x0600);
|
||
|
|
int bytes_read;
|
||
|
|
int target_processor;
|
||
|
|
|
||
|
|
/* Special case: 32 bit MOV */
|
||
|
|
if ((insn & 0xffe0) == 0x0620)
|
||
|
|
short_op = true;
|
||
|
|
|
||
|
|
bytes_read = short_op ? 2 : 4;
|
||
|
|
|
||
|
|
/* If this is a two byte insn, then mask off the high bits. */
|
||
|
|
if (short_op)
|
||
|
|
insn &= 0xffff;
|
||
|
|
|
||
|
|
switch (info->mach)
|
||
|
|
{
|
||
|
|
case 0:
|
||
|
|
default:
|
||
|
|
target_processor = PROCESSOR_V850;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case bfd_mach_v850e:
|
||
|
|
target_processor = PROCESSOR_V850E;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case bfd_mach_v850ea:
|
||
|
|
target_processor = PROCESSOR_V850EA;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Find the opcode. */
|
||
|
|
while (op->name)
|
||
|
|
{
|
||
|
|
if ((op->mask & insn) == op->opcode
|
||
|
|
&& (op->processors & target_processor))
|
||
|
|
{
|
||
|
|
const unsigned char * opindex_ptr;
|
||
|
|
unsigned int opnum;
|
||
|
|
unsigned int memop;
|
||
|
|
|
||
|
|
match = 1;
|
||
|
|
(*info->fprintf_func) (info->stream, "%s\t", op->name);
|
||
|
|
/*fprintf (stderr, "match: mask: %x insn: %x, opcode: %x, name: %s\n", op->mask, insn, op->opcode, op->name );*/
|
||
|
|
|
||
|
|
memop = op->memop;
|
||
|
|
/* Now print the operands.
|
||
|
|
|
||
|
|
MEMOP is the operand number at which a memory
|
||
|
|
address specification starts, or zero if this
|
||
|
|
instruction has no memory addresses.
|
||
|
|
|
||
|
|
A memory address is always two arguments.
|
||
|
|
|
||
|
|
This information allows us to determine when to
|
||
|
|
insert commas into the output stream as well as
|
||
|
|
when to insert disp[reg] expressions onto the
|
||
|
|
output stream. */
|
||
|
|
|
||
|
|
for (opindex_ptr = op->operands, opnum = 1;
|
||
|
|
*opindex_ptr != 0;
|
||
|
|
opindex_ptr++, opnum++)
|
||
|
|
{
|
||
|
|
long value;
|
||
|
|
int flag;
|
||
|
|
int status;
|
||
|
|
bfd_byte buffer[ 4 ];
|
||
|
|
|
||
|
|
operand = &v850_operands[*opindex_ptr];
|
||
|
|
|
||
|
|
if (operand->extract)
|
||
|
|
value = (operand->extract) (insn, 0);
|
||
|
|
else
|
||
|
|
{
|
||
|
|
if (operand->bits == -1)
|
||
|
|
value = (insn & operand->shift);
|
||
|
|
else
|
||
|
|
value = (insn >> operand->shift) & ((1 << operand->bits) - 1);
|
||
|
|
|
||
|
|
if (operand->flags & V850_OPERAND_SIGNED)
|
||
|
|
value = ((long)(value << (32 - operand->bits))
|
||
|
|
>> (32 - operand->bits));
|
||
|
|
}
|
||
|
|
|
||
|
|
/* The first operand is always output without any
|
||
|
|
special handling.
|
||
|
|
|
||
|
|
For the following arguments:
|
||
|
|
|
||
|
|
If memop && opnum == memop + 1, then we need '[' since
|
||
|
|
we're about to output the register used in a memory
|
||
|
|
reference.
|
||
|
|
|
||
|
|
If memop && opnum == memop + 2, then we need ']' since
|
||
|
|
we just finished the register in a memory reference. We
|
||
|
|
also need a ',' before this operand.
|
||
|
|
|
||
|
|
Else we just need a comma.
|
||
|
|
|
||
|
|
We may need to output a trailing ']' if the last operand
|
||
|
|
in an instruction is the register for a memory address.
|
||
|
|
|
||
|
|
The exception (and there's always an exception) is the
|
||
|
|
"jmp" insn which needs square brackets around it's only
|
||
|
|
register argument. */
|
||
|
|
|
||
|
|
if (memop && opnum == memop + 1) info->fprintf_func (info->stream, "[");
|
||
|
|
else if (memop && opnum == memop + 2) info->fprintf_func (info->stream, "],");
|
||
|
|
else if (memop == 1 && opnum == 1
|
||
|
|
&& (operand->flags & V850_OPERAND_REG))
|
||
|
|
info->fprintf_func (info->stream, "[");
|
||
|
|
else if (opnum > 1) info->fprintf_func (info->stream, ", ");
|
||
|
|
|
||
|
|
/* extract the flags, ignorng ones which do not effect disassembly output. */
|
||
|
|
flag = operand->flags;
|
||
|
|
flag &= ~ V850_OPERAND_SIGNED;
|
||
|
|
flag &= ~ V850_OPERAND_RELAX;
|
||
|
|
flag &= - flag;
|
||
|
|
|
||
|
|
switch (flag)
|
||
|
|
{
|
||
|
|
case V850_OPERAND_REG: info->fprintf_func (info->stream, "%s", v850_reg_names[value]); break;
|
||
|
|
case V850_OPERAND_SRG: info->fprintf_func (info->stream, "%s", v850_sreg_names[value]); break;
|
||
|
|
case V850_OPERAND_CC: info->fprintf_func (info->stream, "%s", v850_cc_names[value]); break;
|
||
|
|
case V850_OPERAND_EP: info->fprintf_func (info->stream, "ep"); break;
|
||
|
|
default: info->fprintf_func (info->stream, "%d", value); break;
|
||
|
|
case V850_OPERAND_DISP:
|
||
|
|
{
|
||
|
|
bfd_vma addr = value + memaddr;
|
||
|
|
|
||
|
|
/* On the v850 the top 8 bits of an address are used by an overlay manager.
|
||
|
|
Thus it may happen that when we are looking for a symbol to match
|
||
|
|
against an address with some of its top bits set, the search fails to
|
||
|
|
turn up an exact match. In this case we try to find an exact match
|
||
|
|
against a symbol in the lower address space, and if we find one, we
|
||
|
|
use that address. We only do this for JARL instructions however, as
|
||
|
|
we do not want to misinterpret branch instructions. */
|
||
|
|
if (operand->bits == 22)
|
||
|
|
{
|
||
|
|
if ( ! info->symbol_at_address_func (addr, info)
|
||
|
|
&& ((addr & 0xFF000000) != 0)
|
||
|
|
&& info->symbol_at_address_func (addr & 0x00FFFFFF, info))
|
||
|
|
{
|
||
|
|
addr &= 0x00FFFFFF;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
info->print_address_func (addr, info);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
case V850E_PUSH_POP:
|
||
|
|
{
|
||
|
|
static int list12_regs[32] = { 30, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 31, 29, 28, 23, 22, 21, 20, 27, 26, 25, 24 };
|
||
|
|
static int list18_h_regs[32] = { 19, 18, 17, 16, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, 30, 31, 29, 28, 23, 22, 21, 20, 27, 26, 25, 24 };
|
||
|
|
static int list18_l_regs[32] = { 3, 2, 1, -2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, 14, 15, 13, 12, 7, 6, 5, 4, 11, 10, 9, 8 };
|
||
|
|
int * regs;
|
||
|
|
int i;
|
||
|
|
unsigned long int mask = 0;
|
||
|
|
int pc = false;
|
||
|
|
int sr = false;
|
||
|
|
|
||
|
|
|
||
|
|
switch (operand->shift)
|
||
|
|
{
|
||
|
|
case 0xffe00001: regs = list12_regs; break;
|
||
|
|
case 0xfff8000f: regs = list18_h_regs; break;
|
||
|
|
case 0xfff8001f: regs = list18_l_regs; value &= ~0x10; break; /* Do not include magic bit */
|
||
|
|
default:
|
||
|
|
/* xgettext:c-format */
|
||
|
|
fprintf (stderr, _("unknown operand shift: %x\n"), operand->shift );
|
||
|
|
abort();
|
||
|
|
}
|
||
|
|
|
||
|
|
for (i = 0; i < 32; i++)
|
||
|
|
{
|
||
|
|
if (value & (1 << i))
|
||
|
|
{
|
||
|
|
switch (regs[ i ])
|
||
|
|
{
|
||
|
|
default: mask |= (1 << regs[ i ]); break;
|
||
|
|
/* xgettext:c-format */
|
||
|
|
case 0: fprintf (stderr, _("unknown pop reg: %d\n"), i ); abort();
|
||
|
|
case -1: pc = true; break;
|
||
|
|
case -2: sr = true; break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
info->fprintf_func (info->stream, "{");
|
||
|
|
|
||
|
|
if (mask || pc || sr)
|
||
|
|
{
|
||
|
|
if (mask)
|
||
|
|
{
|
||
|
|
unsigned int bit;
|
||
|
|
int shown_one = false;
|
||
|
|
|
||
|
|
for (bit = 0; bit < 32; bit++)
|
||
|
|
if (mask & (1 << bit))
|
||
|
|
{
|
||
|
|
unsigned long int first = bit;
|
||
|
|
unsigned long int last;
|
||
|
|
|
||
|
|
if (shown_one)
|
||
|
|
info->fprintf_func (info->stream, ", ");
|
||
|
|
else
|
||
|
|
shown_one = true;
|
||
|
|
|
||
|
|
info->fprintf_func (info->stream, v850_reg_names[first]);
|
||
|
|
|
||
|
|
for (bit++; bit < 32; bit++)
|
||
|
|
if ((mask & (1 << bit)) == 0)
|
||
|
|
break;
|
||
|
|
|
||
|
|
last = bit;
|
||
|
|
|
||
|
|
if (last > first + 1)
|
||
|
|
{
|
||
|
|
info->fprintf_func (info->stream, " - %s", v850_reg_names[ last - 1 ]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (pc)
|
||
|
|
info->fprintf_func (info->stream, "%sPC", mask ? ", " : "");
|
||
|
|
if (sr)
|
||
|
|
info->fprintf_func (info->stream, "%sSR", (mask || pc) ? ", " : "");
|
||
|
|
}
|
||
|
|
|
||
|
|
info->fprintf_func (info->stream, "}");
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
case V850E_IMMEDIATE16:
|
||
|
|
status = info->read_memory_func (memaddr + bytes_read, buffer, 2, info);
|
||
|
|
if (status == 0)
|
||
|
|
{
|
||
|
|
bytes_read += 2;
|
||
|
|
value = bfd_getl16 (buffer);
|
||
|
|
|
||
|
|
/* If this is a DISPOSE instruction with ff set to 0x10, then shift value up by 16. */
|
||
|
|
if ((insn & 0x001fffc0) == 0x00130780)
|
||
|
|
value <<= 16;
|
||
|
|
|
||
|
|
info->fprintf_func (info->stream, "0x%x", value);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
info->memory_error_func (status, memaddr + bytes_read, info);
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
case V850E_IMMEDIATE32:
|
||
|
|
status = info->read_memory_func (memaddr + bytes_read, buffer, 4, info);
|
||
|
|
if (status == 0)
|
||
|
|
{
|
||
|
|
bytes_read += 4;
|
||
|
|
value = bfd_getl32 (buffer);
|
||
|
|
info->fprintf_func (info->stream, "0x%lx", value);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
info->memory_error_func (status, memaddr + bytes_read, info);
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Handle jmp correctly. */
|
||
|
|
if (memop == 1 && opnum == 1
|
||
|
|
&& ((operand->flags & V850_OPERAND_REG) != 0))
|
||
|
|
(*info->fprintf_func) (info->stream, "]");
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Close any square bracket we left open. */
|
||
|
|
if (memop && opnum == memop + 2)
|
||
|
|
(*info->fprintf_func) (info->stream, "]");
|
||
|
|
|
||
|
|
/* All done. */
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
op++;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!match)
|
||
|
|
{
|
||
|
|
if (short_op)
|
||
|
|
info->fprintf_func (info->stream, ".short\t0x%04x", insn);
|
||
|
|
else
|
||
|
|
info->fprintf_func (info->stream, ".long\t0x%08x", insn);
|
||
|
|
}
|
||
|
|
|
||
|
|
return bytes_read;
|
||
|
|
}
|
||
|
|
|
||
|
|
int
|
||
|
|
print_insn_v850 (memaddr, info)
|
||
|
|
bfd_vma memaddr;
|
||
|
|
struct disassemble_info * info;
|
||
|
|
{
|
||
|
|
int status;
|
||
|
|
bfd_byte buffer[ 4 ];
|
||
|
|
unsigned long insn = 0;
|
||
|
|
|
||
|
|
/* First figure out how big the opcode is. */
|
||
|
|
|
||
|
|
status = info->read_memory_func (memaddr, buffer, 2, info);
|
||
|
|
if (status == 0)
|
||
|
|
{
|
||
|
|
insn = bfd_getl16 (buffer);
|
||
|
|
|
||
|
|
if ( (insn & 0x0600) == 0x0600
|
||
|
|
&& (insn & 0xffe0) != 0x0620)
|
||
|
|
{
|
||
|
|
/* If this is a 4 byte insn, read 4 bytes of stuff. */
|
||
|
|
status = info->read_memory_func (memaddr, buffer, 4, info);
|
||
|
|
|
||
|
|
if (status == 0)
|
||
|
|
insn = bfd_getl32 (buffer);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (status != 0)
|
||
|
|
{
|
||
|
|
info->memory_error_func (status, memaddr, info);
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Make sure we tell our caller how many bytes we consumed. */
|
||
|
|
return disassemble (memaddr, info, insn);
|
||
|
|
}
|