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Dasm68000.cpp
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Dasm68000.cpp
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/***************************************************************************
* dasmfw -- Disassembler Framework *
* *
* 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., 675 Mass Ave, Cambridge, MA 02139, USA. *
***************************************************************************/
/* Copyright (C) Hermann Seib *
* The 68000 disassembler engine is loosely based on Jim Patchell's code, *
* last found at http://www.oldcrows.net/~patchell/uproc/uproc.html *
***************************************************************************/
/*****************************************************************************/
/* Dasm68000.cpp : 68000 disassembler implementation */
/*****************************************************************************/
#include "Dasm68000.h"
/*****************************************************************************/
/* Create68000 : create an 68000 processor handler */
/*****************************************************************************/
static Disassembler *Create68000(Application *pApp)
{
Disassembler *pDasm = new Dasm68000(pApp);
if (pDasm) pDasm->Setup();
return pDasm;
}
/*****************************************************************************/
/* Create68008 : create an 68008 processor handler */
/*****************************************************************************/
static Disassembler *Create68008(Application *pApp)
{
Disassembler *pDasm = new Dasm68008(pApp);
if (pDasm) pDasm->Setup();
return pDasm;
}
/*****************************************************************************/
/* Auto-registration */
/*****************************************************************************/
static bool bRegistered[] =
{
RegisterDisassembler("68000", Create68000),
// RegisterDisassembler("68k", Create68000),
RegisterDisassembler("68008", Create68008),
};
/*===========================================================================*/
/* Dasm68000 class members */
/*===========================================================================*/
Dasm68000::OpDef Dasm68000::OpTable[optblSize] =
{
{ _abcd, 0xc100, 0xf1f0, optype_14 }, // 0
{ _adda, 0xd0c0, 0xf0c0, optype_03 },
{ _addx, 0xd100, 0xf130, optype_14 },
{ _add, 0xd000, 0xf000, optype_03 },
{ _cmpa, 0xb0c0, 0xf0c0, optype_03 },
{ _cmpm, 0xb108, 0xf138, optype_19 },
{ _eor, 0xb100, 0xf100, optype_03 },
{ _cmp, 0xb000, 0xf100, optype_03 },
{ _reset, 0x4e70, 0xffff, optype_10 },
{ _rte, 0x4e73, 0xffff, optype_10 },
{ _rtr, 0x4e77, 0xffff, optype_10 }, // 10
{ _rts, 0x4e75, 0xffff, optype_10 },
{ _stop, 0x4e72, 0xffff, optype_25 },
{ _trapv, 0x4e76, 0xffff, optype_10 },
{ _ill, 0x4afc, 0xffff, optype_10 },
{ _nop, 0x4e71, 0xffff, optype_10 },
{ _swap, 0x4840, 0xfff8, optype_05 },
{ _unlk, 0x4e58, 0xfff8, optype_09 },
{ _link, 0x4e50, 0xfff8, optype_01 },
{ _trap, 0x4e40, 0xfff0, optype_24 },
{ _move, 0x4e60, 0xfff8, optype_28 }, // 20
{ _move, 0x4e68, 0xfff8, optype_28 },
{ _tas, 0x4ac0, 0xffc0, optype_05 },
{ _jmp, 0x4ec0, 0xffc0, optype_05 },
{ _jsr, 0x4e80, 0xffc0, optype_05 },
{ _move, 0x40c0, 0xf9c0, optype_26 },
{ _nbcd, 0x4800, 0xffc0, optype_15 },
{ _pea, 0x4840, 0xffc0, optype_05 },
{ _ext, 0x4800, 0xfe30, optype_12 },
{ _movem, 0x4880, 0xfb80, optype_23 },
{ _chk, 0x4180, 0xf1c0, optype_16 }, // 30
{ _lea, 0x41c0, 0xf1c0, optype_02 },
{ _dbcc, 0x54c8, 0xfff8, optype_17 },
{ _dbcs, 0x55c8, 0xfff8, optype_17 },
{ _dbeq, 0x57c8, 0xfff8, optype_17 },
{ _dbf, 0x51c8, 0xfff8, optype_17 },
{ _dbge, 0x5cc8, 0xfff8, optype_17 },
{ _dbgt, 0x5ec8, 0xfff8, optype_17 },
{ _dbhi, 0x52c8, 0xfff8, optype_17 },
{ _dble, 0x5fc8, 0xfff8, optype_17 },
{ _dbls, 0x53c8, 0xfff8, optype_17 }, // 40
{ _dblt, 0x5dc8, 0xfff8, optype_17 },
{ _dbmi, 0x5bc8, 0xfff8, optype_17 },
{ _dbne, 0x56c8, 0xfff8, optype_17 },
{ _dbpl, 0x5ac8, 0xfff8, optype_17 },
{ _dbt, 0x50c8, 0xfff8, optype_17 },
{ _dbvc, 0x58c8, 0xfff8, optype_17 },
{ _dbvs, 0x59c8, 0xfff8, optype_17 },
{ _scc, 0x54c0, 0xffc0, optype_05 },
{ _scs, 0x55c0, 0xffc0, optype_05 },
{ _seq, 0x57c0, 0xffc0, optype_05 }, // 50
{ _sf, 0x51c0, 0xffc0, optype_05 },
{ _sge, 0x5cc0, 0xffc0, optype_05 },
{ _sgt, 0x5ec0, 0xffc0, optype_05 },
{ _shi, 0x52c0, 0xffc0, optype_05 },
{ _sle, 0x5fc0, 0xffc0, optype_05 },
{ _sls, 0x53c0, 0xffc0, optype_05 },
{ _slt, 0x5dc0, 0xffc0, optype_05 },
{ _smi, 0x5bc0, 0xffc0, optype_05 },
{ _sne, 0x56c0, 0xffc0, optype_05 },
{ _spl, 0x5ac0, 0xffc0, optype_05 }, // 60
{ _st, 0x50c0, 0xffc0, optype_05 },
{ _svc, 0x58c0, 0xffc0, optype_05 },
{ _svs, 0x59c0, 0xffc0, optype_05 },
{ _addq, 0x5000, 0xf100, optype_06 },
{ _muls, 0xc1c0, 0xf1c0, optype_16 },
{ _mulu, 0xc0c0, 0xf1c0, optype_16 },
{ _exg, 0xc100, 0xf130, optype_18 },
{ _bcc, 0x6400, 0xff00, optype_08 },
{ _bcs, 0x6500, 0xff00, optype_08 },
{ _beq, 0x6700, 0xff00, optype_08 }, // 70
{ _bge, 0x6c00, 0xff00, optype_08 },
{ _bgt, 0x6e00, 0xff00, optype_08 },
{ _bhi, 0x6200, 0xff00, optype_08 },
{ _ble, 0x6f00, 0xff00, optype_08 },
{ _bls, 0x6300, 0xff00, optype_08 },
{ _blt, 0x6d00, 0xff00, optype_08 },
{ _bmi, 0x6b00, 0xff00, optype_08 },
{ _bne, 0x6600, 0xff00, optype_08 },
{ _bpl, 0x6a00, 0xff00, optype_08 },
{ _bvc, 0x6800, 0xff00, optype_08 }, // 80
{ _bvs, 0x6900, 0xff00, optype_08 },
{ _bra, 0x6000, 0xff00, optype_08 },
{ _bsr, 0x6100, 0xff00, optype_08 },
{ _divs, 0x81c0, 0xf1c0, optype_16 },
{ _divu, 0x80c0, 0xf1c0, optype_16 },
{ _rol, 0xe7c0, 0xffc0, optype_11 },
{ _roxl, 0xe5c0, 0xffc0, optype_11 },
{ _lsl, 0xe3c0, 0xffc0, optype_11 },
{ _asl, 0xe100, 0xf118, optype_11 },
{ _asl, 0xe1c0, 0xf1c0, optype_11 }, // 90
{ _ror, 0xe6c0, 0xffc0, optype_11 },
{ _roxr, 0xe4c0, 0xffc0, optype_11 },
{ _lsr, 0xe2c0, 0xffc0, optype_11 },
{ _asr, 0xe000, 0xf118, optype_11 },
{ _asr, 0xe0c0, 0xf1c0, optype_11 },
{ _lsr, 0xe008, 0xf118, optype_11 },
{ _lsl, 0xe108, 0xf118, optype_11 },
{ _rol, 0xe118, 0xf118, optype_11 },
{ _ror, 0xe018, 0xf118, optype_11 },
{ _roxl, 0xe110, 0xf118, optype_11 }, // 100
{ _roxr, 0xe010, 0xf118, optype_11 },
{ _sbcd, 0x8100, 0xf1f0, optype_14 },
{ _moveq, 0x7000, 0xf100, optype_22 },
{ _move_b, 0x1000, 0xf000, optype_04 },
{ _move_w, 0x3000, 0xf000, optype_04 },
{ _move_l, 0x2000, 0xf000, optype_04 },
{ _and, 0xc000, 0xf000, optype_03 },
{ _or, 0x8000, 0xf000, optype_03 },
{ _ori, 0x003c, 0xffff, optype_27 },
{ _ori, 0x007c, 0xffff, optype_27 }, // 110
{ _eori, 0x0a3c, 0xffff, optype_27 },
{ _eori, 0x0a7c, 0xffff, optype_27 },
{ _andi, 0x023c, 0xffff, optype_27 },
{ _andi, 0x027c, 0xffff, optype_27 },
{ _movep_w, 0x0108, 0xf1f8, optype_29 },
{ _movep_w, 0x0188, 0xf1f8, optype_29 },
{ _movep_l, 0x0148, 0xf1f8, optype_29 },
{ _movep_l, 0x01c8, 0xf1f8, optype_29 },
{ _btst, 0x0800, 0xffc0, optype_20 },
{ _bset, 0x08c0, 0xffc0, optype_20 }, // 120
{ _bchg, 0x0840, 0xffc0, optype_20 },
{ _bclr, 0x0880, 0xffc0, optype_20 },
{ _tst, 0x4a00, 0xff00, optype_07 },
{ _clr, 0x4200, 0xff00, optype_15 },
{ _neg, 0x4400, 0xff00, optype_15 },
{ _negx, 0x4000, 0xff00, optype_15 },
{ _not, 0x4600, 0xff00, optype_15 },
{ _subi, 0x0400, 0xff00, optype_13 },
{ _eori, 0x0a00, 0xff00, optype_13 },
{ _cmpi, 0x0c00, 0xff00, optype_13 }, // 130
{ _andi, 0x0200, 0xff00, optype_13 },
{ _addi, 0x0600, 0xff00, optype_13 },
{ _ori, 0x0000, 0xff00, optype_13 },
{ _btst, 0x0100, 0xf1c0, optype_21 },
{ _bset, 0x01c0, 0xf1c0, optype_21 },
{ _bchg, 0x0140, 0xf1c0, optype_21 },
{ _bclr, 0x0180, 0xf1c0, optype_21 },
{ _subq, 0x5100, 0xf100, optype_06 },
{ _suba, 0x90c0, 0xf0c0, optype_03 },
{ _subx, 0x9100, 0xf130, optype_14 }, // 140
{ _sub, 0x9000, 0xf000, optype_03 },
{ _ill, 0x0000, 0x0000, optype_unknown }
};
/*****************************************************************************/
/* opcodes : 68000 opcodes array for initialization */
/*****************************************************************************/
OpCode Dasm68000::opcodes[mnemo68000_count] =
{
{ "EQU", Data }, /* _equ */
{ "ORG", Data }, /* _org */
{ "PHASE", Data }, /* _phase */
{ "DEPHASE", Data }, /* _dephase */
{ "END", Data }, /* _end */
{ "???", Data }, /* _ill */
{ "ABCD", Data }, /* _abcd */
{ "ADDA", Data }, /* _adda */
{ "ADDI", Data }, /* _addi */
{ "ADDQ", Data }, /* _addq */
{ "ADDX", Data }, /* _addx */
{ "ADD", Data }, /* _add */
{ "AND", Data }, /* _and */
{ "ANDI", Data }, /* _andi */
{ "ASL", Data }, /* _asl */
{ "ASR", Data }, /* _asr */
{ "BCC", Code }, /* _bcc */
{ "BCHG", Data }, /* _bchg */
{ "BCLR", Data }, /* _bclr */
{ "BCS", Code }, /* _bcs */
{ "BEQ", Code }, /* _beq */
{ "BGE", Code }, /* _bge */
{ "BGT", Code }, /* _bgt */
{ "BHI", Code }, /* _bhi */
{ "BLE", Code }, /* _ble */
{ "BLS", Code }, /* _bls */
{ "BLT", Code }, /* _blt */
{ "BMI", Code }, /* _bmi */
{ "BNE", Code }, /* _bne */
{ "BPL", Code }, /* _bpl */
{ "BRA", Code }, /* _bra */
{ "BSET", Data }, /* _bset */
{ "BSR", Code }, /* _bsr */
{ "BTST", Data }, /* _btst */
{ "BVC", Code }, /* _bvc */
{ "BVS", Code }, /* _bvs */
{ "CHK", Data }, /* _chk */
{ "CLR", Data }, /* _clr */
{ "CMP", Data }, /* _cmp */
{ "CMPA", Data }, /* _cmpa */
{ "CMPI", Data }, /* _cmpi */
{ "CMPM", Data }, /* _cmpm */
{ "DBCC", Code }, /* _dbcc */
{ "DBCS", Code }, /* _dbcs */
{ "DBEQ", Code }, /* _dbeq */
{ "DBF", Code }, /* _dbf */
{ "DBGE", Code }, /* _dbge */
{ "DBGT", Code }, /* _dbgt */
{ "DBHI", Code }, /* _dbhi */
{ "DBLE", Code }, /* _dble */
{ "DBLS", Code }, /* _dbls */
{ "DBLT", Code }, /* _dblt */
{ "DBMI", Code }, /* _dbmi */
{ "DBNE", Code }, /* _dbne */
{ "DBPL", Code }, /* _dbpl */
{ "DBT", Code }, /* _dbt */
{ "DBVC", Code }, /* _dbvc */
{ "DBVS", Code }, /* _dbvs */
{ "DIVS", Data }, /* _divs */
{ "DIVU", Data }, /* _divu */
{ "EOR", Data }, /* _eor */
{ "EORI", Data }, /* _eori */
{ "EXG", Data }, /* _exg */
{ "EXT", Data }, /* _ext */
{ "JMP", Code }, /* _jmp */
{ "JSR", Code }, /* _jsr */
{ "LEA", Data }, /* _lea */
{ "LINK", Data }, /* _link */
{ "LSL", Data }, /* _lsl */
{ "LSR", Data }, /* _lsr */
{ "MOVE", Data }, /* _move */
{ "MOVE.B", Data }, /* _move_b */
{ "MOVE.W", Data }, /* _move_w */
{ "MOVE.L", Data }, /* _move_l */
{ "MOVEM", Data }, /* _movem */
{ "MOVEP.W", Data }, /* _movep_w */
{ "MOVEP.L", Data }, /* _movep_l */
{ "MOVEQ", Data }, /* _moveq */
{ "MULS", Data }, /* _muls */
{ "MULU", Data }, /* _mulu */
{ "NBCD", Data }, /* _nbcd */
{ "NEG", Data }, /* _neg */
{ "NEGX", Data }, /* _negx */
{ "NOP", Data }, /* _nop */
{ "NOT", Data }, /* _not */
{ "OR", Data }, /* _or */
{ "ORI", Data }, /* _ori */
{ "PEA", Data }, /* _pea */
{ "RESET", Data }, /* _reset */
{ "ROL", Data }, /* _rol */
{ "ROR", Data }, /* _ror */
{ "ROXL", Data }, /* _roxl */
{ "ROXR", Data }, /* _roxr */
{ "RTE", Data }, /* _rte */
{ "RTR", Data }, /* _rtr */
{ "RTS", Data }, /* _rts */
{ "SBCD", Data }, /* _sbcd */
{ "SCC", Data }, /* _scc */
{ "SCS", Data }, /* _scs */
{ "SEQ", Data }, /* _seq */
{ "SF", Data }, /* _sf */
{ "SGE", Data }, /* _sge */
{ "SGT", Data }, /* _sgt */
{ "SHI", Data }, /* _shi */
{ "SLE", Data }, /* _sle */
{ "SLS", Data }, /* _sls */
{ "SLT", Data }, /* _slt */
{ "SMI", Data }, /* _smi */
{ "SNE", Data }, /* _sne */
{ "SPL", Data }, /* _spl */
{ "ST", Data }, /* _st */
{ "STOP", Data }, /* _stop */
{ "SUB", Data }, /* _sub */
{ "SUBA", Data }, /* _suba */
{ "SUBI", Data }, /* _subi */
{ "SUBQ", Data }, /* _subq */
{ "SUBX", Data }, /* _subx */
{ "SVC", Data }, /* _svc */
{ "SVS", Data }, /* _svs */
{ "SWAP", Data }, /* _swap */
{ "TAS", Data }, /* _tas */
{ "TRAP", Data }, /* _trap */
{ "TRAPV", Data }, /* _trapv */
{ "TST", Data }, /* _tst */
{ "UNLK", Data }, /* _unlk */
/* Pseudo-Ops: */
{ "DC", Data }, /* _dc */
{ "RMB", Data }, /* _rmb */
};
/*****************************************************************************/
/* regnames : 68000 register names array for initialization */
/*****************************************************************************/
const char *Dasm68000::regnames[reg68000_count] =
{
"?", /* _unkr */
"A0", /* _a0 */
"A1", /* _a1 */
"A2", /* _a2 */
"A3", /* _a3 */
"A4", /* _a4 */
"A5", /* _a5 */
"A6", /* _a6 */
"A7", /* _a7 */
"D0", /* _d0 */
"D1", /* _d1 */
"D2", /* _d2 */
"D3", /* _d3 */
"D4", /* _d4 */
"D5", /* _d5 */
"D6", /* _d6 */
"D7", /* _d7 */
"PC", /* _pc */
"CCR", /* _ccr */
"SR", /* _sr */
"USP", /* _usp */
};
/*****************************************************************************/
/* Dasm68000 : constructor */
/*****************************************************************************/
Dasm68000::Dasm68000(Application *pApp)
: Disassembler(pApp)
{
#if 1
asmtype = "gen";
#else
gas = false;
#endif
useFCC = true;
closeCC = true;
// TEST TETS TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST
showInstTypes = false;
commentStart = ";";
sExtByte = ".B";
sExtShort = ".S";
sExtWord = ".W";
sExtLong = ".L";
sExtQuad = ".Q";
hdrHex = "$";
hdrDec = "";
hdrOct = "@";
hdrBin = "%";
int i, j;
mnemo.resize(mnemo68000_count); /* set up mnemonics table */
for (i = 0; i < mnemo68000_count; i++)
mnemo[i] = opcodes[i];
regname.resize(reg68000_count); /* set up register name table */
for (i = 0; i < reg68000_count; i++)
regname[i] = regnames[i];
/* set up instruction table */
otIndex = new uint8_t[65536];
for (i = optblSize - 1; i > 0; i--)
if (OpTable[i - 1].ot != optype_unknown)
break;
memset(otIndex, i, 65536);
for (--i; i >= 0; i--)
{
int nStart = OpTable[i].op_code;
int nEnd = (nStart | ~OpTable[i].mask) & 0xffff;
for (j = nStart; j <= nEnd; j++)
{
if ((j & OpTable[i].mask) == OpTable[i].op_code)
otIndex[j] = (uint8_t)i;
}
}
AddOption("asm", "{gas|bird|gen[eric]}\tCreate output for a specific assembler",
static_cast<PSetter>(&Dasm68000::Set68000Option),
static_cast<PGetter>(&Dasm68000::Get68000Option));
AddOption("closecc", "{off|on}\tadd closing delimiter to char constants",
static_cast<PSetter>(&Dasm68000::Set68000Option),
static_cast<PGetter>(&Dasm68000::Get68000Option));
AddOption("fcc", "{off|on}\tuse FCC to define data",
static_cast<PSetter>(&Dasm68000::Set68000Option),
static_cast<PGetter>(&Dasm68000::Get68000Option));
#ifdef _DEBUG
// this is only for debugging the disassembler!
AddOption("shit", "{off|on}\tshow instruction types",
static_cast<PSetter>(&Dasm68000::Set68000Option),
static_cast<PGetter>(&Dasm68000::Get68000Option));
#endif
}
/*****************************************************************************/
/* ~Dasm68000 : destructor */
/*****************************************************************************/
Dasm68000::~Dasm68000(void)
{
if (otIndex)
delete[] otIndex;
}
/*****************************************************************************/
/* Set68000Option : sets a disassembler option */
/*****************************************************************************/
int Dasm68000::Set68000Option(string lname, string value)
{
bool bnValue = true; /* default to "on" */
bool bIsBool = ParseBool(value, bnValue);
if (lname == "asm")
{
string lvalue(lowercase(value));
if (lvalue == "generic")
lvalue = "gen";
SetAsmType(lvalue);
return 1;
}
else if (lname == "closecc")
{
closeCC = bnValue;
return bIsBool ? 1 : 0;
}
else if (lname == "fcc")
{
useFCC = bnValue;
return bIsBool ? 1 : 0;
}
else if (lname == "shit")
{
showInstTypes = bnValue;
return bIsBool ? 1 : 0;
}
// should never happen ... but better safe than sorry
return 1; /* name and value consumed */
}
/*****************************************************************************/
/* Get68000Option : retrieves a disassembler option */
/*****************************************************************************/
string Dasm68000::Get68000Option(string lname)
{
if (lname == "asm")
return asmtype;
else if (lname == "closecc")
return closeCC ? "on" : "off";
else if (lname == "fcc")
return useFCC ? "on" : "off";
else if (lname == "shit")
return showInstTypes ? "on" : "off";
return "";
}
/*****************************************************************************/
/* SetAsmType : set up to produce output for a specific assembler */
/*****************************************************************************/
void Dasm68000::SetAsmType(string &newType)
{
if (newType == "gas" || newType == "bird" || newType == "gen")
{
asmtype = newType;
if (asmtype == "bird")
{
hdrHex = "0x";
hdrOct = "0";
hdrBin = "0b";
hdrDec = "0d";
}
else
{
hdrHex = "$";
hdrOct = "@";
hdrBin = "%";
hdrDec = "";
}
}
#if 0
// let's see whether we need that ...
int i;
static struct
{
int mnemo; /* mnemonic */
const char *asmtype; /* assembler output */
const char *mne; /* mnemonic */
} mnemomod[] =
{
{ _adda, "gen", "ADDA" },
{ _adda, "bird", "ADD" },
{ _adda, "gen", "ADDA" },
{ _addi, "gen", "ADDI" },
{ _addi, "bird", "ADD" },
{ _addi, "gen", "ADDI" },
{ _addq, "gen", "ADDQ" },
{ _addq, "bird", "ADD" },
{ _addq, "gen", "ADDQ" },
};
for (i = 0; i < _countof(mnemomod); i++)
if (asmtype == mnemomod[i].asmtype)
opcodes[mnemomod[i].mnemo].mne = mnemomod[i].mne;
#endif
if (asmtype == "gas")
{
sExtShort = ".S";
}
else if (asmtype == "bird")
{
sExtShort = ".W"; // can't do that
}
else // "gen" or anything else
{
sExtShort = ".S";
}
}
/*****************************************************************************/
/* String2Number : convert a string to a number in all known formats */
/*****************************************************************************/
bool Dasm68000::String2Number(string s, adr_t &value)
{
/* Standard formats for known 680xx assemblers :
- a character has a leading '
and may be followed by a (n unchecked) closing '
- a binary has a leading %
- an octal constant has a leading @
- a hex constant has a leading $
*/
s = ltrim(s);
if (s[0] == '$')
return (sscanf(s.substr(1).c_str(), "%x", &value) == 1);
else if (s[0] == '@')
return (sscanf(s.substr(1).c_str(), "%o", &value) == 1);
else if (s[0] == '\'' && s.size() > 1)
{
value = s[1];
return true;
}
else if (s[0] == '%')
{
for (string::size_type i = 1; i < s.size(); i++)
{
char c = s[i];
if (c >= '0' && c <= '1')
value = (value << 1) + (c - '0');
else
return false;
}
}
// allow base class to check for others
return Disassembler::String2Number(s, value);
}
/*****************************************************************************/
/* Number2String : converts a number to a string in a variety of formats */
/*****************************************************************************/
string Dasm68000::Number2String
(
adr_t value,
int nDigits,
adr_t addr,
int bus
)
{
string s;
/* Standard formats for known 680xx assemblers :
- a character has a leading '
and may be followed by a (n unchecked) closing '
- a binary has a leading %
- an octal constant has a leading @
- a hex constant has a leading $
*/
MemAttribute::Type cellType = GetCellType(addr, bus);
MemAttribute::Display disp;
bool bSigned = false;
if (cellType == MemAttribute::CellUntyped)
disp = MemAttribute::DefaultDisplay;
else
{
disp = GetDisplay(addr, bus);
bSigned = IsSigned(addr, bus);
}
if (disp == MemAttribute::DefaultDisplay)
disp = defaultDisplay;
if (disp == MemAttribute::Char && /* if character output requested */
(nDigits == 2 || isprint(value))) /* and printable or 2-digit */
{
value &= 0xff;
if (isprint(value))
s = sformat("'%c%s", value, closeCC ? "'" : "");
else
s = sformat("%s%02x", hdrHex.c_str(), value);
}
else if (disp == MemAttribute::Binary) /* if a binary */
{
int nBit;
nDigits *= 4; /* convert from digits to bits */
s = hdrBin; /* prepare a binary value */
/* now do for all bits */
for (nBit = nDigits - 1; nBit >= 0; nBit--)
s.push_back('0' + (!!(value & (1 << nBit))));
}
else if (disp == MemAttribute::Hex) /* if hex */
{
adr_t mask = 0;
for (int i = 0; i < nDigits; i++)
mask |= (0x0f << (i * 4));
value &= mask;
#if 0
s = sformat("$%0*X", nDigits, value); /* prepare a hex value */
#else
// prepare a hex value with as many places as necessary
s = sformat("%0*X", nDigits, value);
while (s.size() > 2 && s.substr(0, 2) == "00")
s = s.substr(2);
s = hdrHex + s;
#endif
}
else if (disp == MemAttribute::Octal) /* if octal display */
s = sformat("%s%0*o", hdrOct.c_str(), (nDigits * 4) + 2 / 3, value);
else /* otherwise */
{
if (bSigned)
{
int32_t sval; // sign extension, simple way
if (nDigits == 2) sval = (int32_t)((int8_t)value);
else if (nDigits == 4) sval = (int32_t)((int16_t)value);
else sval = (int32_t)value;
s = sformat("%d", sval); /* prepare signed decimal value */
}
else
{
adr_t mask = 0;
for (int i = 0; i < nDigits; i++)
mask |= (0x0f << (i * 4));
value &= mask;
s = sformat("%u", value); /* prepare unsigned decimal value */
}
}
return s; /* pass back generated string */
}
/*****************************************************************************/
/* InitParse : initialize parsing */
/*****************************************************************************/
bool Dasm68000::InitParse(int bus)
{
// TODO: initialize system vector names etc.
return Disassembler::InitParse(bus);
}
/*****************************************************************************/
/* ParseData : parse data at given memory address for labels */
/*****************************************************************************/
adr_t Dasm68000::ParseData
(
adr_t addr,
int bus
)
{
SetLabelUsed(addr, Const, bus); /* mark DefLabels as used */
// TODO: complete this!
int csz = GetCellSize(addr, bus);
if (!IsConst(addr, bus) && !IsBss(addr))
{
if (csz == 2) /* if WORD data */
SetLabelUsed(GetUWord(addr), Code, bus, addr);
else if (csz == 4) /* if DWORD data */
SetLabelUsed(GetUDWord(addr), Code, bus, addr);
}
return csz;
}
/*****************************************************************************/
/* Helper functionality, copied from dis.cpp - adapt ASAP! */
/*****************************************************************************/
#define BYTE_SIZE 0x0100
#define WORD_SIZE 0x0101
#define LONG_SIZE 0x0102
static int xlate_size(int &size, int type)
{
if (type == 0) /* main type */
{
switch (size)
{
case 0:
return BYTE_SIZE;
case 1:
return WORD_SIZE;
case 2:
return LONG_SIZE;
}
}
else if (type == 1) /* for move op */
{
switch (size)
{
case 1:
size = 0;
return BYTE_SIZE;
case 2:
size = 2;
return LONG_SIZE;
case 3:
size = 1;
return WORD_SIZE;
}
}
return 0;
}
/*****************************************************************************/
/* ParseCode : parse instruction at given memory address for labels */
/*****************************************************************************/
adr_t Dasm68000::ParseCode
(
adr_t addr,
int bus
)
{
uint16_t code = GetUWord(addr, bus);
int i = otIndex[code];
adr_t len = 2; /* default to 2 bytes length */
switch (OpTable[i].ot) /* parse according to op type */
{
case optype_01 :
len = ParseOptype01(addr, addr + 2, code, i) - addr;
break;
case optype_02 :
len = ParseOptype02(addr, addr + 2, code, i) - addr;
break;
case optype_03 :
len = ParseOptype03(addr, addr + 2, code, i) - addr;
break;
case optype_04 :
len = ParseOptype04(addr, addr + 2, code, i) - addr;
break;
case optype_05 :
len = ParseOptype05(addr, addr + 2, code, i) - addr;
break;
case optype_06 :
len = ParseOptype06(addr, addr + 2, code, i) - addr;
break;
case optype_07 :
len = ParseOptype07(addr, addr + 2, code, i) - addr;
break;
case optype_08 :
len = ParseOptype08(addr, addr + 2, code, i) - addr;
break;
case optype_09 :
len = ParseOptype09(addr, addr + 2, code, i) - addr;
break;
case optype_10 :
len = ParseOptype10(addr, addr + 2, code, i) - addr;
break;
case optype_11 :
len = ParseOptype11(addr, addr + 2, code, i) - addr;
break;
case optype_12 :
len = ParseOptype12(addr, addr + 2, code, i) - addr;
break;
case optype_13 :
len = ParseOptype13(addr, addr + 2, code, i) - addr;
break;
case optype_14 :
len = ParseOptype14(addr, addr + 2, code, i) - addr;
break;
case optype_15 :
len = ParseOptype15(addr, addr + 2, code, i) - addr;
break;
case optype_16 :
len = ParseOptype16(addr, addr + 2, code, i) - addr;
break;
case optype_17 :
len = ParseOptype17(addr, addr + 2, code, i) - addr;
break;
case optype_18 :
len = ParseOptype18(addr, addr + 2, code, i) - addr;
break;
case optype_19 :
len = ParseOptype19(addr, addr + 2, code, i) - addr;
break;
case optype_20 :
len = ParseOptype20(addr, addr + 2, code, i) - addr;
break;
case optype_21 :
len = ParseOptype21(addr, addr + 2, code, i) - addr;
break;
case optype_22 :
len = ParseOptype22(addr, addr + 2, code, i) - addr;
break;
case optype_23 :
len = ParseOptype23(addr, addr + 2, code, i) - addr;
break;
case optype_24 :
len = ParseOptype24(addr, addr + 2, code, i) - addr;
break;
case optype_25 :
len = ParseOptype25(addr, addr + 2, code, i) - addr;
break;
case optype_26 :
len = ParseOptype26(addr, addr + 2, code, i) - addr;
break;
case optype_27 :
len = ParseOptype27(addr, addr + 2, code, i) - addr;
break;
case optype_28 :
len = ParseOptype28(addr, addr + 2, code, i) - addr;
break;
case optype_29 :
len = ParseOptype29(addr, addr + 2, code, i) - addr;
break;
default : /* not a valid instruction ? */
SetInvalidInstruction(addr, 2, bus); /* mark it as such */
break;
}
return len;
}
/*****************************************************************************/
/* ParseEffectiveAddress : parse the EA part of an instruction */
/*****************************************************************************/
adr_t Dasm68000::ParseEffectiveAddress
(
adr_t instaddr, /* address of instruction start */
adr_t addr, /* current address */
uint16_t ea,
int16_t index, /* index into opcode table */
int op_mode
)
{
int32_t displacement;
int16_t short_adr;
int index_reg;
int index_reg_ind;
int index_size;
int32_t a1;
MemoryType mt = mnemo[OpTable[index].mnemo].memType;
int mode = (ea & 0x38) >> 3;
int reg = ea & 0x7;
switch(mode)
{
case 0: /* one of the data registers */
case 1: /* one of the address registers */
case 2: /* indirect address */
// sprintf(s,"(%s)", GetAddrReg(reg));
case 3: /* indirect address with increment */
// sprintf(s,"(%s)+", GetAddrReg(reg));
case 4: /* indirect address with decrement */
// sprintf(s,"-(%s)", GetAddrReg(reg));
break;
case 5: /* address with displacement */
displacement = GetSWord(addr);
addr += 2;
// sprintf(s,"$%x(%s)", displacement, GetAddrReg(reg));
break;
case 6: /* indexed address with displacement */
displacement = GetUWord(addr);
addr += 2;
index_reg = (displacement & 0x7000) >> 12;
index_reg_ind = (displacement & 0x8000)>> 15;
index_size = (displacement & 0x8000) >> 11;
displacement = (signed char)(displacement & 0xff);
#if 0
if (index_size)
{
s1 = sExtLong;
}
else
{
s1 = sExtWord;
}
if(index_reg_ind)
{
/* address reg is index reg */
sprintf(s,"$%x(%s,%s%s)",displacement, GetAddrReg(reg), GetAddrReg(index_reg]),s1);
}
else
{
/* data reg is index reg */
sprintf(s,"$%x(%s,%s%s)",displacement, GetAddrReg(reg), GetDataReg(index_reg),s1);
}
#endif
break;
case 7:
switch (reg)
{
case 0: /* absolute short */
short_adr = GetSWord(addr);
SetCellSize(addr, 2);
// sprintf(s,"$%lx%s",(long)short_adr, sExtShort.c_str());
if (!IsConst(addr))
{
SetLabelUsed((uint16_t)short_adr, mt, BusCode, instaddr);
a1 = PhaseInner((uint16_t)short_adr, instaddr);
AddRelativeLabel(a1, addr, mt, true, BusCode, instaddr);
}
addr += 2;
break;
case 1: /* absolute long */
a1 = GetSDWord(addr);
SetCellSize(addr, 4);
if (!IsConst(addr))
SetLabelUsed(a1, mt, BusCode, instaddr);
a1 = PhaseInner(a1, instaddr);
if ((adr_t)a1 <= GetHighestCodeAddr())
AddRelativeLabel(a1, addr, mt, true, BusCode, instaddr);
addr += 4;
break;
case 2: /* program counter with displacement */
displacement = GetSWord(addr);
SetCellSize(addr, 2);
a1 = (int32_t)addr + displacement;
// sprintf(s,"$%lx(PC)",a1);
if (!IsConst(addr))
SetLabelUsed(a1, mt, BusCode, instaddr);
a1 = PhaseInner(a1, instaddr);
if ((adr_t)a1 <= GetHighestCodeAddr())
AddRelativeLabel(a1, addr, mt, true, BusCode, instaddr);
addr += 2;
break;