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/* tilepro-dis.c. Disassembly routines for the TILEPro architecture.
Copyright (C) 2011-2017 Free Software Foundation, Inc.
This file is part of the GNU opcodes library.
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 3 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 "sysdep.h"
#include <stddef.h>
#include <assert.h>
#include "bfd.h"
#include "elf/tilepro.h"
#include "elf-bfd.h"
#include "disassemble.h"
#include "opcode/tilepro.h"
#define TREG_ZERO 63
static int
contains_insn (tilepro_mnemonic expected_mnemonic,
int expected_first_operand,
int expected_second_operand,
bfd_vma memaddr,
int *last_operand_ret,
disassemble_info *info)
{
struct tilepro_decoded_instruction
decoded[TILEPRO_MAX_INSTRUCTIONS_PER_BUNDLE];
bfd_byte opbuf[TILEPRO_BUNDLE_SIZE_IN_BYTES];
int i, num_instructions;
if ((*info->read_memory_func) (memaddr, opbuf,
TILEPRO_BUNDLE_SIZE_IN_BYTES, info) != 0)
/* If we cannot even read the memory, it obviously does not have the
instruction for which we are looking. */
return 0;
/* Parse the instructions in the bundle. */
num_instructions = parse_insn_tilepro (bfd_getl64 (opbuf), memaddr, decoded);
for (i = 0; i < num_instructions; i++)
{
const struct tilepro_opcode *opcode = decoded[i].opcode;
if (opcode->mnemonic != expected_mnemonic)
continue;
if (expected_first_operand != -1
&& decoded[i].operand_values[0] != expected_first_operand)
continue;
if (expected_second_operand != -1
&& decoded[i].operand_values[1] != expected_second_operand)
continue;
*last_operand_ret = decoded[i].operand_values[opcode->num_operands - 1];
return 1;
}
/* No match. */
return 0;
}
int
print_insn_tilepro (bfd_vma memaddr, disassemble_info *info)
{
struct tilepro_decoded_instruction
decoded[TILEPRO_MAX_INSTRUCTIONS_PER_BUNDLE];
bfd_byte opbuf[TILEPRO_BUNDLE_SIZE_IN_BYTES];
int status, i, num_instructions, num_printed;
tilepro_mnemonic padding_mnemonic;
status = (*info->read_memory_func) (memaddr, opbuf,
TILEPRO_BUNDLE_SIZE_IN_BYTES, info);
if (status != 0)
{
(*info->memory_error_func) (status, memaddr, info);
return -1;
}
info->bytes_per_line = TILEPRO_BUNDLE_SIZE_IN_BYTES;
info->bytes_per_chunk = TILEPRO_BUNDLE_SIZE_IN_BYTES;
info->octets_per_byte = 1;
info->display_endian = BFD_ENDIAN_LITTLE;
/* Parse the instructions in the bundle. */
num_instructions = parse_insn_tilepro (bfd_getl64 (opbuf), memaddr, decoded);
/* Print the instructions in the bundle. */
info->fprintf_func (info->stream, "{ ");
num_printed = 0;
/* Determine which nop opcode is used for padding and should be skipped. */
padding_mnemonic = TILEPRO_OPC_FNOP;
for (i = 0; i < num_instructions; i++)
{
if (!decoded[i].opcode->can_bundle)
{
/* Instructions that cannot be bundled are padded out with nops,
rather than fnops. Displaying them is always clutter. */
padding_mnemonic = TILEPRO_OPC_NOP;
break;
}
}
for (i = 0; i < num_instructions; i++)
{
const struct tilepro_opcode *opcode = decoded[i].opcode;
const char *name;
int j;
/* Do not print out fnops, unless everything is an fnop, in
which case we will print out just the last one. */
if (opcode->mnemonic == padding_mnemonic
&& (num_printed > 0 || i + 1 < num_instructions))
continue;
if (num_printed > 0)
info->fprintf_func (info->stream, " ; ");
++num_printed;
name = opcode->name;
if (name == NULL)
name = "<invalid>";
info->fprintf_func (info->stream, "%s", name);
for (j = 0; j < opcode->num_operands; j++)
{
int num;
const struct tilepro_operand *op;
const char *spr_name;
if (j > 0)
info->fprintf_func (info->stream, ",");
info->fprintf_func (info->stream, " ");
num = decoded[i].operand_values[j];
op = decoded[i].operands[j];
switch (op->type)
{
case TILEPRO_OP_TYPE_REGISTER:
info->fprintf_func (info->stream, "%s",
tilepro_register_names[num]);
break;
case TILEPRO_OP_TYPE_SPR:
spr_name = get_tilepro_spr_name(num);
if (spr_name != NULL)
info->fprintf_func (info->stream, "%s", spr_name);
else
info->fprintf_func (info->stream, "%d", num);
break;
case TILEPRO_OP_TYPE_IMMEDIATE:
{
bfd_vma addr = 0;
int found_addr = 0;
int addr_piece;
switch (opcode->mnemonic)
{
case TILEPRO_OPC_ADDLI:
if (contains_insn (TILEPRO_OPC_AULI,
decoded[i].operand_values[1],
TREG_ZERO,
memaddr - TILEPRO_BUNDLE_SIZE_IN_BYTES,
&addr_piece,
info))
{
addr = num + (addr_piece << 16);
found_addr = 1;
}
break;
case TILEPRO_OPC_AULI:
if (contains_insn (TILEPRO_OPC_MOVELI,
decoded[i].operand_values[1],
-1,
memaddr - TILEPRO_BUNDLE_SIZE_IN_BYTES,
&addr_piece,
info))
{
addr = (num << 16) + addr_piece;
found_addr = 1;
}
break;
default:
/* Operand does not look like a constructed address. */
break;
}
info->fprintf_func (info->stream, "%d", num);
if (found_addr)
{
info->fprintf_func (info->stream, " /* ");
info->print_address_func (addr, info);
info->fprintf_func (info->stream, " */");
}
}
break;
case TILEPRO_OP_TYPE_ADDRESS:
info->print_address_func ((bfd_vma)(unsigned int) num, info);
break;
default:
abort ();
}
}
}
info->fprintf_func (info->stream, " }");
return TILEPRO_BUNDLE_SIZE_IN_BYTES;
}
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