mirror of
https://github.com/darlinghq/darling-gdb.git
synced 2024-12-22 03:58:06 +00:00
408 lines
9.9 KiB
C
408 lines
9.9 KiB
C
/* Disassemble D30V instructions.
|
|
Copyright 1997, 1998, 2000, 2001 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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
|
|
|
|
#include <stdio.h>
|
|
#include "sysdep.h"
|
|
#include "opcode/d30v.h"
|
|
#include "dis-asm.h"
|
|
#include "opintl.h"
|
|
|
|
#define PC_MASK 0xFFFFFFFF
|
|
|
|
static int lookup_opcode PARAMS ((struct d30v_insn *insn, long num, int is_long));
|
|
static void print_insn PARAMS ((struct disassemble_info *info, bfd_vma memaddr, long long num,
|
|
struct d30v_insn *insn, int is_long, int show_ext));
|
|
static int extract_value PARAMS ((long long num, struct d30v_operand *oper, int is_long));
|
|
|
|
int
|
|
print_insn_d30v (memaddr, info)
|
|
bfd_vma memaddr;
|
|
struct disassemble_info *info;
|
|
{
|
|
int status, result;
|
|
bfd_byte buffer[12];
|
|
unsigned long in1, in2;
|
|
struct d30v_insn insn;
|
|
long long num;
|
|
|
|
insn.form = (struct d30v_format *) NULL;
|
|
|
|
info->bytes_per_line = 8;
|
|
info->bytes_per_chunk = 4;
|
|
info->display_endian = BFD_ENDIAN_BIG;
|
|
|
|
status = (*info->read_memory_func) (memaddr, buffer, 4, info);
|
|
if (status != 0)
|
|
{
|
|
(*info->memory_error_func) (status, memaddr, info);
|
|
return -1;
|
|
}
|
|
in1 = bfd_getb32 (buffer);
|
|
|
|
status = (*info->read_memory_func) (memaddr + 4, buffer, 4, info);
|
|
if (status != 0)
|
|
{
|
|
info->bytes_per_line = 8;
|
|
if (!(result = lookup_opcode (&insn, in1, 0)))
|
|
(*info->fprintf_func) (info->stream, ".long\t0x%x", in1);
|
|
else
|
|
print_insn (info, memaddr, (long long) in1, &insn, 0, result);
|
|
return 4;
|
|
}
|
|
in2 = bfd_getb32 (buffer);
|
|
|
|
if (in1 & in2 & FM01)
|
|
{
|
|
/* LONG instruction. */
|
|
if (!(result = lookup_opcode (&insn, in1, 1)))
|
|
{
|
|
(*info->fprintf_func) (info->stream, ".long\t0x%x,0x%x", in1, in2);
|
|
return 8;
|
|
}
|
|
num = (long long) in1 << 32 | in2;
|
|
print_insn (info, memaddr, num, &insn, 1, result);
|
|
}
|
|
else
|
|
{
|
|
num = in1;
|
|
if (!(result = lookup_opcode (&insn, in1, 0)))
|
|
(*info->fprintf_func) (info->stream, ".long\t0x%x", in1);
|
|
else
|
|
print_insn (info, memaddr, num, &insn, 0, result);
|
|
|
|
switch (((in1 >> 31) << 1) | (in2 >> 31))
|
|
{
|
|
case 0:
|
|
(*info->fprintf_func) (info->stream, "\t||\t");
|
|
break;
|
|
case 1:
|
|
(*info->fprintf_func) (info->stream, "\t->\t");
|
|
break;
|
|
case 2:
|
|
(*info->fprintf_func) (info->stream, "\t<-\t");
|
|
default:
|
|
break;
|
|
}
|
|
|
|
insn.form = (struct d30v_format *) NULL;
|
|
num = in2;
|
|
if (!(result = lookup_opcode (&insn, in2, 0)))
|
|
(*info->fprintf_func) (info->stream, ".long\t0x%x", in2);
|
|
else
|
|
print_insn (info, memaddr, num, &insn, 0, result);
|
|
}
|
|
return 8;
|
|
}
|
|
|
|
/* Return 0 if lookup fails,
|
|
1 if found and only one form,
|
|
2 if found and there are short and long forms. */
|
|
|
|
static int
|
|
lookup_opcode (insn, num, is_long)
|
|
struct d30v_insn *insn;
|
|
long num;
|
|
int is_long;
|
|
{
|
|
int i = 0, index;
|
|
struct d30v_format *f;
|
|
struct d30v_opcode *op = (struct d30v_opcode *) d30v_opcode_table;
|
|
int op1 = (num >> 25) & 0x7;
|
|
int op2 = (num >> 20) & 0x1f;
|
|
int mod = (num >> 18) & 0x3;
|
|
|
|
/* Find the opcode. */
|
|
do
|
|
{
|
|
if ((op->op1 == op1) && (op->op2 == op2))
|
|
break;
|
|
op++;
|
|
}
|
|
while (op->name);
|
|
|
|
if (!op || !op->name)
|
|
return 0;
|
|
|
|
while (op->op1 == op1 && op->op2 == op2)
|
|
{
|
|
/* Scan through all the formats for the opcode. */
|
|
index = op->format[i++];
|
|
do
|
|
{
|
|
f = (struct d30v_format *) &d30v_format_table[index];
|
|
while (f->form == index)
|
|
{
|
|
if ((!is_long || f->form >= LONG) && (f->modifier == mod))
|
|
{
|
|
insn->form = f;
|
|
break;
|
|
}
|
|
f++;
|
|
}
|
|
if (insn->form)
|
|
break;
|
|
}
|
|
while ((index = op->format[i++]) != 0);
|
|
if (insn->form)
|
|
break;
|
|
op++;
|
|
i = 0;
|
|
}
|
|
if (insn->form == NULL)
|
|
return 0;
|
|
|
|
insn->op = op;
|
|
insn->ecc = (num >> 28) & 0x7;
|
|
if (op->format[1])
|
|
return 2;
|
|
else
|
|
return 1;
|
|
}
|
|
|
|
static void
|
|
print_insn (info, memaddr, num, insn, is_long, show_ext)
|
|
struct disassemble_info *info;
|
|
bfd_vma memaddr;
|
|
long long num;
|
|
struct d30v_insn *insn;
|
|
int is_long;
|
|
int show_ext;
|
|
{
|
|
int val, opnum, need_comma = 0;
|
|
struct d30v_operand *oper;
|
|
int i, match, opind = 0, need_paren = 0, found_control = 0;
|
|
|
|
(*info->fprintf_func) (info->stream, "%s", insn->op->name);
|
|
|
|
/* Check for CMP or CMPU. */
|
|
if (d30v_operand_table[insn->form->operands[0]].flags & OPERAND_NAME)
|
|
{
|
|
opind++;
|
|
val =
|
|
extract_value (num,
|
|
(struct d30v_operand *) &d30v_operand_table[insn->form->operands[0]],
|
|
is_long);
|
|
(*info->fprintf_func) (info->stream, "%s", d30v_cc_names[val]);
|
|
}
|
|
|
|
/* Add in ".s" or ".l". */
|
|
if (show_ext == 2)
|
|
{
|
|
if (is_long)
|
|
(*info->fprintf_func) (info->stream, ".l");
|
|
else
|
|
(*info->fprintf_func) (info->stream, ".s");
|
|
}
|
|
|
|
if (insn->ecc)
|
|
(*info->fprintf_func) (info->stream, "/%s", d30v_ecc_names[insn->ecc]);
|
|
|
|
(*info->fprintf_func) (info->stream, "\t");
|
|
|
|
while ((opnum = insn->form->operands[opind++]) != 0)
|
|
{
|
|
int bits;
|
|
oper = (struct d30v_operand *) &d30v_operand_table[opnum];
|
|
bits = oper->bits;
|
|
if (oper->flags & OPERAND_SHIFT)
|
|
bits += 3;
|
|
|
|
if (need_comma
|
|
&& oper->flags != OPERAND_PLUS
|
|
&& oper->flags != OPERAND_MINUS)
|
|
{
|
|
need_comma = 0;
|
|
(*info->fprintf_func) (info->stream, ", ");
|
|
}
|
|
|
|
if (oper->flags == OPERAND_ATMINUS)
|
|
{
|
|
(*info->fprintf_func) (info->stream, "@-");
|
|
continue;
|
|
}
|
|
if (oper->flags == OPERAND_MINUS)
|
|
{
|
|
(*info->fprintf_func) (info->stream, "-");
|
|
continue;
|
|
}
|
|
if (oper->flags == OPERAND_PLUS)
|
|
{
|
|
(*info->fprintf_func) (info->stream, "+");
|
|
continue;
|
|
}
|
|
if (oper->flags == OPERAND_ATSIGN)
|
|
{
|
|
(*info->fprintf_func) (info->stream, "@");
|
|
continue;
|
|
}
|
|
if (oper->flags == OPERAND_ATPAR)
|
|
{
|
|
(*info->fprintf_func) (info->stream, "@(");
|
|
need_paren = 1;
|
|
continue;
|
|
}
|
|
|
|
if (oper->flags == OPERAND_SPECIAL)
|
|
continue;
|
|
|
|
val = extract_value (num, oper, is_long);
|
|
|
|
if (oper->flags & OPERAND_REG)
|
|
{
|
|
match = 0;
|
|
if (oper->flags & OPERAND_CONTROL)
|
|
{
|
|
struct d30v_operand *oper3 =
|
|
(struct d30v_operand *) &d30v_operand_table[insn->form->operands[2]];
|
|
int id = extract_value (num, oper3, is_long);
|
|
found_control = 1;
|
|
switch (id)
|
|
{
|
|
case 0:
|
|
val |= OPERAND_CONTROL;
|
|
break;
|
|
case 1:
|
|
case 2:
|
|
val = OPERAND_CONTROL + MAX_CONTROL_REG + id;
|
|
break;
|
|
case 3:
|
|
val |= OPERAND_FLAG;
|
|
break;
|
|
default:
|
|
fprintf (stderr, "illegal id (%d)\n", id);
|
|
}
|
|
}
|
|
else if (oper->flags & OPERAND_ACC)
|
|
val |= OPERAND_ACC;
|
|
else if (oper->flags & OPERAND_FLAG)
|
|
val |= OPERAND_FLAG;
|
|
for (i = 0; i < reg_name_cnt (); i++)
|
|
{
|
|
if (val == pre_defined_registers[i].value)
|
|
{
|
|
if (pre_defined_registers[i].pname)
|
|
(*info->fprintf_func)
|
|
(info->stream, "%s", pre_defined_registers[i].pname);
|
|
else
|
|
(*info->fprintf_func)
|
|
(info->stream, "%s", pre_defined_registers[i].name);
|
|
match = 1;
|
|
break;
|
|
}
|
|
}
|
|
if (match == 0)
|
|
{
|
|
/* This would only get executed if a register was not in
|
|
the register table. */
|
|
(*info->fprintf_func)
|
|
(info->stream, _("<unknown register %d>"), val & 0x3F);
|
|
}
|
|
}
|
|
/* repeati has a relocation, but its first argument is a plain
|
|
immediate. OTOH instructions like djsri have a pc-relative
|
|
delay target, but an absolute jump target. Therefore, a test
|
|
of insn->op->reloc_flag is not specific enough; we must test
|
|
if the actual operand we are handling now is pc-relative. */
|
|
else if (oper->flags & OPERAND_PCREL)
|
|
{
|
|
int neg = 0;
|
|
|
|
/* IMM6S3 is unsigned. */
|
|
if (oper->flags & OPERAND_SIGNED || bits == 32)
|
|
{
|
|
long max;
|
|
max = (1 << (bits - 1));
|
|
if (val & max)
|
|
{
|
|
if (bits == 32)
|
|
val = -val;
|
|
else
|
|
val = -val & ((1 << bits) - 1);
|
|
neg = 1;
|
|
}
|
|
}
|
|
if (neg)
|
|
{
|
|
(*info->fprintf_func) (info->stream, "-%x\t(", val);
|
|
(*info->print_address_func) ((memaddr - val) & PC_MASK, info);
|
|
(*info->fprintf_func) (info->stream, ")");
|
|
}
|
|
else
|
|
{
|
|
(*info->fprintf_func) (info->stream, "%x\t(", val);
|
|
(*info->print_address_func) ((memaddr + val) & PC_MASK, info);
|
|
(*info->fprintf_func) (info->stream, ")");
|
|
}
|
|
}
|
|
else if (insn->op->reloc_flag == RELOC_ABS)
|
|
{
|
|
(*info->print_address_func) (val, info);
|
|
}
|
|
else
|
|
{
|
|
if (oper->flags & OPERAND_SIGNED)
|
|
{
|
|
int max = (1 << (bits - 1));
|
|
if (val & max)
|
|
{
|
|
val = -val;
|
|
if (bits < 32)
|
|
val &= ((1 << bits) - 1);
|
|
(*info->fprintf_func) (info->stream, "-");
|
|
}
|
|
}
|
|
(*info->fprintf_func) (info->stream, "0x%x", val);
|
|
}
|
|
/* If there is another operand, then write a comma and space. */
|
|
if (insn->form->operands[opind] && !(found_control && opind == 2))
|
|
need_comma = 1;
|
|
}
|
|
if (need_paren)
|
|
(*info->fprintf_func) (info->stream, ")");
|
|
}
|
|
|
|
static int
|
|
extract_value (num, oper, is_long)
|
|
long long num;
|
|
struct d30v_operand *oper;
|
|
int is_long;
|
|
{
|
|
int val;
|
|
int shift = 12 - oper->position;
|
|
int mask = (0xFFFFFFFF >> (32 - oper->bits));
|
|
|
|
if (is_long)
|
|
{
|
|
if (oper->bits == 32)
|
|
{
|
|
/* Piece together 32-bit constant. */
|
|
val = ((num & 0x3FFFF)
|
|
| ((num & 0xFF00000) >> 2)
|
|
| ((num & 0x3F00000000LL) >> 6));
|
|
}
|
|
else
|
|
val = (num >> (32 + shift)) & mask;
|
|
}
|
|
else
|
|
val = (num >> shift) & mask;
|
|
|
|
if (oper->flags & OPERAND_SHIFT)
|
|
val <<= 3;
|
|
|
|
return val;
|
|
}
|