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darling-gdb/opcodes/v850-dis.c

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/* Disassemble V850 instructions.
Copyright (C) 1996 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"
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",
"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;
/* start-sanitize-v850e */
/* Special case: 32 bit MOV */
if ((insn & 0xffe0) == 0x0620)
short_op = true;
/* end-sanitize-v850e */
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;
/* start-sanitize-v850e */
case bfd_mach_v850e:
target_processor = PROCESSOR_V850E;
break;
case bfd_mach_v850eq:
target_processor = PROCESSOR_V850EQ;
break;
/* end-sanitize-v850e */
}
/* 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;
case V850_OPERAND_DISP: info->print_address_func (value + memaddr, info); break;
default: info->fprintf_func (info->stream, "%d", value); break;
/* start-sanitize-v850e */
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:
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;
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;
/* end-sanitize-v850e */
}
/* 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;
/* 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);
}
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