binutils-gdb/opcodes/tic54x-dis.c

596 lines
19 KiB
C

/* Disassembly routines for TMS320C54X architecture
Copyright (C) 1999-2017 Free Software Foundation, Inc.
Contributed by Timothy Wall (twall@cygnus.com)
This file is part of the GNU opcodes library.
This library 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, or (at your option)
any later version.
It 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 file; see the file COPYING. If not, write to the
Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston,
MA 02110-1301, USA. */
#include "sysdep.h"
#include <errno.h>
#include <math.h>
#include <stdlib.h>
#include "dis-asm.h"
#include "opcode/tic54x.h"
#include "coff/tic54x.h"
static int has_lkaddr (unsigned short, const insn_template *);
static int get_insn_size (unsigned short, const insn_template *);
static int print_instruction (disassemble_info *, bfd_vma,
unsigned short, const char *,
const enum optype [], int, int);
static int print_parallel_instruction (disassemble_info *, bfd_vma,
unsigned short,
const insn_template *, int);
static int sprint_dual_address (disassemble_info *,char [],
unsigned short);
static int sprint_indirect_address (disassemble_info *,char [],
unsigned short);
static int sprint_direct_address (disassemble_info *,char [],
unsigned short);
static int sprint_mmr (disassemble_info *,char [],int);
static int sprint_condition (disassemble_info *,char *,unsigned short);
static int sprint_cc2 (disassemble_info *,char *,unsigned short);
int
print_insn_tic54x (bfd_vma memaddr, disassemble_info *info)
{
bfd_byte opbuf[2];
unsigned short opcode;
int status, size;
const insn_template* tm;
status = (*info->read_memory_func) (memaddr, opbuf, 2, info);
if (status != 0)
{
(*info->memory_error_func) (status, memaddr, info);
return -1;
}
opcode = bfd_getl16 (opbuf);
tm = tic54x_get_insn (info, memaddr, opcode, &size);
info->bytes_per_line = 2;
info->bytes_per_chunk = 2;
info->octets_per_byte = 2;
info->display_endian = BFD_ENDIAN_LITTLE;
if (tm->flags & FL_PAR)
{
if (!print_parallel_instruction (info, memaddr, opcode, tm, size))
return -1;
}
else
{
if (!print_instruction (info, memaddr, opcode,
(char *) tm->name,
tm->operand_types,
size, (tm->flags & FL_EXT)))
return -1;
}
return size * 2;
}
static int
has_lkaddr (unsigned short memdata, const insn_template *tm)
{
return (IS_LKADDR (memdata)
&& (OPTYPE (tm->operand_types[0]) == OP_Smem
|| OPTYPE (tm->operand_types[1]) == OP_Smem
|| OPTYPE (tm->operand_types[2]) == OP_Smem
|| OPTYPE (tm->operand_types[1]) == OP_Sind
|| OPTYPE (tm->operand_types[0]) == OP_Lmem
|| OPTYPE (tm->operand_types[1]) == OP_Lmem));
}
/* always returns 1 (whether an insn template was found) since we provide an
"unknown instruction" template */
const insn_template*
tic54x_get_insn (disassemble_info *info, bfd_vma addr,
unsigned short memdata, int *size)
{
const insn_template *tm = NULL;
for (tm = tic54x_optab; tm->name; tm++)
{
if (tm->opcode == (memdata & tm->mask))
{
/* a few opcodes span two words */
if (tm->flags & FL_EXT)
{
/* if lk addressing is used, the second half of the opcode gets
pushed one word later */
bfd_byte opbuf[2];
bfd_vma addr2 = addr + 1 + has_lkaddr (memdata, tm);
int status = (*info->read_memory_func) (addr2, opbuf, 2, info);
// FIXME handle errors
if (status == 0)
{
unsigned short data2 = bfd_getl16 (opbuf);
if (tm->opcode2 == (data2 & tm->mask2))
{
if (size) *size = get_insn_size (memdata, tm);
return tm;
}
}
}
else
{
if (size) *size = get_insn_size (memdata, tm);
return tm;
}
}
}
for (tm = (insn_template *) tic54x_paroptab; tm->name; tm++)
{
if (tm->opcode == (memdata & tm->mask))
{
if (size) *size = get_insn_size (memdata, tm);
return tm;
}
}
if (size) *size = 1;
return &tic54x_unknown_opcode;
}
static int
get_insn_size (unsigned short memdata, const insn_template *insn)
{
int size;
if (insn->flags & FL_PAR)
{
/* only non-parallel instructions support lk addressing */
size = insn->words;
}
else
{
size = insn->words + has_lkaddr (memdata, insn);
}
return size;
}
int
print_instruction (disassemble_info *info,
bfd_vma memaddr,
unsigned short opcode,
const char *tm_name,
const enum optype tm_operands[],
int size,
int ext)
{
static int n;
/* string storage for multiple operands */
char operand[4][64] = { {0},{0},{0},{0}, };
bfd_byte buf[2];
unsigned long opcode2 = 0;
unsigned long lkaddr = 0;
enum optype src = OP_None;
enum optype dst = OP_None;
int i, shift;
char *comma = "";
info->fprintf_func (info->stream, "%-7s", tm_name);
if (size > 1)
{
int status = (*info->read_memory_func) (memaddr + 1, buf, 2, info);
if (status != 0)
return 0;
lkaddr = opcode2 = bfd_getl16 (buf);
if (size > 2)
{
status = (*info->read_memory_func) (memaddr + 2, buf, 2, info);
if (status != 0)
return 0;
opcode2 = bfd_getl16 (buf);
}
}
for (i = 0; i < MAX_OPERANDS && OPTYPE (tm_operands[i]) != OP_None; i++)
{
char *next_comma = ",";
int optional = (tm_operands[i] & OPT) != 0;
switch (OPTYPE (tm_operands[i]))
{
case OP_Xmem:
sprint_dual_address (info, operand[i], XMEM (opcode));
info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
break;
case OP_Ymem:
sprint_dual_address (info, operand[i], YMEM (opcode));
info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
break;
case OP_Smem:
case OP_Sind:
case OP_Lmem:
info->fprintf_func (info->stream, "%s", comma);
if (INDIRECT (opcode))
{
if (MOD (opcode) >= 12)
{
bfd_vma addr = lkaddr;
int arf = ARF (opcode);
int mod = MOD (opcode);
if (mod == 15)
info->fprintf_func (info->stream, "*(");
else
info->fprintf_func (info->stream, "*%sar%d(",
(mod == 13 || mod == 14 ? "+" : ""),
arf);
(*(info->print_address_func)) ((bfd_vma) addr, info);
info->fprintf_func (info->stream, ")%s",
mod == 14 ? "%" : "");
}
else
{
sprint_indirect_address (info, operand[i], opcode);
info->fprintf_func (info->stream, "%s", operand[i]);
}
}
else
{
/* FIXME -- use labels (print_address_func) */
/* in order to do this, we need to guess what DP is */
sprint_direct_address (info, operand[i], opcode);
info->fprintf_func (info->stream, "%s", operand[i]);
}
break;
case OP_dmad:
info->fprintf_func (info->stream, "%s", comma);
(*(info->print_address_func)) ((bfd_vma) opcode2, info);
break;
case OP_xpmad:
/* upper 7 bits of address are in the opcode */
opcode2 += ((unsigned long) opcode & 0x7F) << 16;
/* fall through */
case OP_pmad:
info->fprintf_func (info->stream, "%s", comma);
(*(info->print_address_func)) ((bfd_vma) opcode2, info);
break;
case OP_MMRX:
sprint_mmr (info, operand[i], MMRX (opcode));
info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
break;
case OP_MMRY:
sprint_mmr (info, operand[i], MMRY (opcode));
info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
break;
case OP_MMR:
sprint_mmr (info, operand[i], MMR (opcode));
info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
break;
case OP_PA:
sprintf (operand[i], "pa%d", (unsigned) opcode2);
info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
break;
case OP_SRC:
src = SRC (ext ? opcode2 : opcode) ? OP_B : OP_A;
sprintf (operand[i], (src == OP_B) ? "b" : "a");
info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
break;
case OP_SRC1:
src = SRC1 (ext ? opcode2 : opcode) ? OP_B : OP_A;
sprintf (operand[i], (src == OP_B) ? "b" : "a");
info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
break;
case OP_RND:
dst = DST (opcode) ? OP_B : OP_A;
sprintf (operand[i], (dst == OP_B) ? "a" : "b");
info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
break;
case OP_DST:
dst = DST (ext ? opcode2 : opcode) ? OP_B : OP_A;
if (!optional || dst != src)
{
sprintf (operand[i], (dst == OP_B) ? "b" : "a");
info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
}
else
next_comma = comma;
break;
case OP_B:
sprintf (operand[i], "b");
info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
break;
case OP_A:
sprintf (operand[i], "a");
info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
break;
case OP_ARX:
sprintf (operand[i], "ar%d", (int) ARX (opcode));
info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
break;
case OP_SHIFT:
shift = SHIFT (ext ? opcode2 : opcode);
if (!optional || shift != 0)
{
sprintf (operand[i], "%d", shift);
info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
}
else
next_comma = comma;
break;
case OP_SHFT:
shift = SHFT (opcode);
if (!optional || shift != 0)
{
sprintf (operand[i], "%d", (unsigned) shift);
info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
}
else
next_comma = comma;
break;
case OP_lk:
sprintf (operand[i], "#%d", (int) (short) opcode2);
info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
break;
case OP_T:
sprintf (operand[i], "t");
info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
break;
case OP_TS:
sprintf (operand[i], "ts");
info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
break;
case OP_k8:
sprintf (operand[i], "%d", (int) ((signed char) (opcode & 0xFF)));
info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
break;
case OP_16:
sprintf (operand[i], "16");
info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
break;
case OP_ASM:
sprintf (operand[i], "asm");
info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
break;
case OP_BITC:
sprintf (operand[i], "%d", (int) (opcode & 0xF));
info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
break;
case OP_CC:
/* put all CC operands in the same operand */
sprint_condition (info, operand[i], opcode);
info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
i = MAX_OPERANDS;
break;
case OP_CC2:
sprint_cc2 (info, operand[i], opcode);
info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
break;
case OP_CC3:
{
const char *code[] = { "eq", "lt", "gt", "neq" };
/* Do not use sprintf with only two parameters as a
compiler warning could be generated in such conditions. */
sprintf (operand[i], "%s", code[CC3 (opcode)]);
info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
break;
}
case OP_123:
{
int code = (opcode >> 8) & 0x3;
sprintf (operand[i], "%d", (code == 0) ? 1 : (code == 2) ? 2 : 3);
info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
break;
}
case OP_k5:
sprintf (operand[i], "#%d",
(int) (((signed char) opcode & 0x1F) << 3) >> 3);
info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
break;
case OP_k8u:
sprintf (operand[i], "#%d", (unsigned) (opcode & 0xFF));
info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
break;
case OP_k3:
sprintf (operand[i], "#%d", (int) (opcode & 0x7));
info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
break;
case OP_lku:
sprintf (operand[i], "#%d", (unsigned) opcode2);
info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
break;
case OP_N:
n = (opcode >> 9) & 0x1;
sprintf (operand[i], "st%d", n);
info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
break;
case OP_SBIT:
{
const char *status0[] = {
"0", "1", "2", "3", "4", "5", "6", "7", "8",
"ovb", "ova", "c", "tc", "13", "14", "15"
};
const char *status1[] = {
"0", "1", "2", "3", "4",
"cmpt", "frct", "c16", "sxm", "ovm", "10",
"intm", "hm", "xf", "cpl", "braf"
};
sprintf (operand[i], "%s",
n ? status1[SBIT (opcode)] : status0[SBIT (opcode)]);
info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
break;
}
case OP_12:
sprintf (operand[i], "%d", (int) ((opcode >> 9) & 1) + 1);
info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
break;
case OP_TRN:
sprintf (operand[i], "trn");
info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
break;
case OP_DP:
sprintf (operand[i], "dp");
info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
break;
case OP_k9:
/* FIXME-- this is DP, print the original address? */
sprintf (operand[i], "#%d", (int) (opcode & 0x1FF));
info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
break;
case OP_ARP:
sprintf (operand[i], "arp");
info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
break;
case OP_031:
sprintf (operand[i], "%d", (int) (opcode & 0x1F));
info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
break;
default:
sprintf (operand[i], "??? (0x%x)", tm_operands[i]);
info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
break;
}
comma = next_comma;
}
return 1;
}
static int
print_parallel_instruction (disassemble_info *info,
bfd_vma memaddr,
unsigned short opcode,
const insn_template *ptm,
int size)
{
print_instruction (info, memaddr, opcode,
ptm->name, ptm->operand_types, size, 0);
info->fprintf_func (info->stream, " || ");
return print_instruction (info, memaddr, opcode,
ptm->parname, ptm->paroperand_types, size, 0);
}
static int
sprint_dual_address (disassemble_info *info ATTRIBUTE_UNUSED,
char buf[],
unsigned short code)
{
const char *formats[] = {
"*ar%d",
"*ar%d-",
"*ar%d+",
"*ar%d+0%%",
};
return sprintf (buf, formats[XMOD (code)], XARX (code));
}
static int
sprint_indirect_address (disassemble_info *info ATTRIBUTE_UNUSED,
char buf[],
unsigned short opcode)
{
const char *formats[] = {
"*ar%d",
"*ar%d-",
"*ar%d+",
"*+ar%d",
"*ar%d-0B",
"*ar%d-0",
"*ar%d+0",
"*ar%d+0B",
"*ar%d-%%",
"*ar%d-0%%",
"*ar%d+%%",
"*ar%d+0%%",
};
return sprintf (buf, formats[MOD (opcode)], ARF (opcode));
}
static int
sprint_direct_address (disassemble_info *info ATTRIBUTE_UNUSED,
char buf[],
unsigned short opcode)
{
/* FIXME -- look up relocation if available */
return sprintf (buf, "DP+0x%02x", (int) (opcode & 0x7F));
}
static int
sprint_mmr (disassemble_info *info ATTRIBUTE_UNUSED,
char buf[],
int mmr)
{
tic54x_symbol *reg = (tic54x_symbol *) mmregs;
while (reg->name != NULL)
{
if (mmr == reg->value)
{
sprintf (buf, "%s", (reg + 1)->name);
return 1;
}
++reg;
}
sprintf (buf, "MMR(%d)", mmr); /* FIXME -- different targets. */
return 0;
}
static int
sprint_cc2 (disassemble_info *info ATTRIBUTE_UNUSED,
char *buf,
unsigned short opcode)
{
const char *cc2[] = {
"??", "??", "ageq", "alt", "aneq", "aeq", "agt", "aleq",
"??", "??", "bgeq", "blt", "bneq", "beq", "bgt", "bleq",
};
return sprintf (buf, "%s", cc2[opcode & 0xF]);
}
static int
sprint_condition (disassemble_info *info ATTRIBUTE_UNUSED,
char *buf,
unsigned short opcode)
{
char *start = buf;
const char *cmp[] = {
"??", "??", "geq", "lt", "neq", "eq", "gt", "leq"
};
if (opcode & 0x40)
{
char acc = (opcode & 0x8) ? 'b' : 'a';
if (opcode & 0x7)
buf += sprintf (buf, "%c%s%s", acc, cmp[(opcode & 0x7)],
(opcode & 0x20) ? ", " : "");
if (opcode & 0x20)
buf += sprintf (buf, "%c%s", acc, (opcode & 0x10) ? "ov" : "nov");
}
else if (opcode & 0x3F)
{
if (opcode & 0x30)
buf += sprintf (buf, "%s%s",
((opcode & 0x30) == 0x30) ? "tc" : "ntc",
(opcode & 0x0F) ? ", " : "");
if (opcode & 0x0C)
buf += sprintf (buf, "%s%s",
((opcode & 0x0C) == 0x0C) ? "c" : "nc",
(opcode & 0x03) ? ", " : "");
if (opcode & 0x03)
buf += sprintf (buf, "%s",
((opcode & 0x03) == 0x03) ? "bio" : "nbio");
}
else
buf += sprintf (buf, "unc");
return buf - start;
}