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disassemble.cpp
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disassemble.cpp
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#include <iostream>
#include <vector>
#include <fstream>
#include <stdio.h>
#include <string>
using namespace std;
string bold_on=string("\e[1m");
string bold_off=string("\e[0m");
bool code_only;
bool show_instruction_number;
bool show_address;
bool show_opcodes;
bool show_ticks;
bool tick_count;
int hexToInt( string h )
{
int retVal = 0;
int exponent=0;
int l=h.length()-1;
for( int i = l; i >=0; i-- )
{
switch(h[i])
{
//case '0':
//retVal+= 0*pow(16,exponent);
//break;
case '1':
retVal+= pow(16,exponent);
break;
case '2':
retVal+= 2*pow(16,exponent);
break;
case '3':
retVal+= 3*pow(16,exponent);
break;
case '4':
retVal+= 4*pow(16,exponent);
break;
case '5':
retVal+= 5*pow(16,exponent);
break;
case '6':
retVal+= 6*pow(16,exponent);
break;
case '7':
retVal+= 7*pow(16,exponent);
break;
case '8':
retVal+= 8*pow(16,exponent);
break;
case '9':
retVal+= 9*pow(16,exponent);
break;
case 'A':
retVal+= 10*pow(16,exponent);
break;
case 'B':
retVal+= 11*pow(16,exponent);
break;
case 'C':
retVal+= 12*pow(16,exponent);
break;
case 'D':
retVal+= 13*pow(16,exponent);
break;
case 'E':
retVal+= 14*pow(16,exponent);
break;
case 'F':
retVal+= 15*pow(16,exponent);
//break;
//case 'x':
//retVal+=0;
//default:
}
exponent++;
}
return retVal;
}
int toTwosComp( int x )
{
int retVal=x;
if( x > 128 )
{
retVal=x ^ 0xFF;
retVal++;
retVal*=(-1);
}
return retVal;
}
string dec2Binary( int x )
{
string retVal="";
double t=x;
while( t>0 )
{
t/=2;
int r = 2*(t-(int)t);
switch(r)
{
case 0:
retVal="0"+retVal;
break;
case 1:
retVal="1"+retVal;
}
t=(int)t;
}
if( retVal.length() == 1 ) retVal="0" + retVal;
if( retVal.length() == 3 ) retVal="0" + retVal;
if( retVal.length() == 5 ) retVal="0" + retVal;
if( retVal.length() == 7 ) retVal="0" + retVal;
retVal+="b";
return retVal;
}
string dec2Hex( int x, int digits = 2)
{
string retVal="";
if (x==0) retVal = string("00");
double t=x;
while( t>0 )
{
t/=16;
int r = 16*(t-(int)t);
switch(r)
{
case 0:
retVal="0"+retVal;
break;
case 1:
retVal="1"+retVal;
break;
case 2:
retVal="2"+retVal;
break;
case 3:
retVal="3"+retVal;
break;
case 4:
retVal="4"+retVal;
break;
case 5:
retVal="5"+retVal;
break;
case 6:
retVal="6"+retVal;
break;
case 7:
retVal="7"+retVal;
break;
case 8:
retVal="8"+retVal;
break;
case 9:
retVal="9"+retVal;
break;
case 10:
retVal="A"+retVal;
break;
case 11:
retVal="B"+retVal;
break;
case 12:
retVal="C"+retVal;
break;
case 13:
retVal="D"+retVal;
break;
case 14:
retVal="E"+retVal;
break;
case 15:
retVal="F"+retVal;
}
t=(int)t;
}
if( retVal.length() == 1 ) retVal="0" + retVal;
if( retVal.length() == 3 ) retVal="0" + retVal;
if( retVal.length() == 5 ) retVal="0" + retVal;
if( retVal.length() == 7 ) retVal="0" + retVal;
while( retVal.length() < digits ) retVal="0" + retVal;
retVal="0x"+retVal;
if (retVal.length() == 4) retVal=string("@") + retVal;
return retVal;
}
class label
{
public:
~label(){};
label(){address=0;name=string("");};
label(int a, string n)
{
address=a;
name=n;
#ifdef DEBUG
cerr << "creating label named: " << name << "\t" << address << endl;
#endif
}
int getAddress(){ return address; };
void setAddress( int a ){ address=a; };
string getName(){ return name; };
void setName( string s ){ name = s; };
friend ostream &operator << (ostream &out, const label &l);
private:
int address;
string name;
};
ostream & operator << (ostream &out, const label &l)
{
out << l.name << ":\t\t\t;" << l.address << endl;
return out;
}
class mnemonic
{
public:
~mnemonic(){};
mnemonic( unsigned char a, unsigned char b, unsigned char c, unsigned char d );
mnemonic( unsigned char a, unsigned char b, unsigned char c );
mnemonic( unsigned char a, unsigned char b );
mnemonic( unsigned char a );
mnemonic();
void print();
bool isValid(){return valid;};
string getInstruction(){return instruction;};
void setInstruction( string i ){ instruction=i; };
int getSize(){return size;};
void setData( unsigned char a ){bytes_only=true; bytes[0]=a;size=1;instruction=string(".db ") + dec2Hex( a, 2 );valid=true;}
void setAddress( int a ){ address = a; };
void setInstructionNumber( int a ){ instruction_number=a; };
int getInstructionNumber(){ return instruction_number; };
int getAddress(){ return address; };
unsigned char byte(int i){ return bytes[i]; };
int getJumpToAddress(){ return jump_to_address; };
bool processLabel();
bool processAddress();
void setJumpToName( string n ){ jump_to_name = n; };
bool bytesOnly(){ return bytes_only; };
void bytesOnly(bool b){ bytes_only=b; };
int getTicks(){ return ticks; };
friend ostream &operator << (ostream &out, const mnemonic &m);
private:
bool bytes_only;
int instruction_number;
int size;
unsigned char bytes[4];
// string label;
int address;
int ticks;
int ticks2; // for conditions that have 2 tick counts
string instruction;
bool valid;
bool relative_jump;
bool absolute_jump;
bool absolute_load;
string jump_to_name;
int jump_to_address;
};
bool mnemonic::processAddress()
{
bool retVal=false;
if( relative_jump )
{
// replace 0x00 in instruction with %label_name
// 2021 01 02 - ONLY IF IT's NOT TOO FAR
// if the jump is too far, then make it a data byte
std::size_t found = instruction.find(string("@0x"));
if ( (found!=std::string::npos) && (jump_to_name != "" ) )
{
#ifdef DEBUG
cout << "replacing a @0xHH (relative jump) [" << instruction << "] --> [";
#endif
instruction.replace(instruction.find(string("@0x")),5,string("%")+jump_to_name);
#ifdef DEBUG
cout << instruction << "]" << endl;
#endif
retVal=true;
}
}
else if ( absolute_jump || absolute_load )
{
// replace 0x0000 in instruction with &label_name
std::size_t found = instruction.find(string("0x"));
if ( (found!=std::string::npos) && (jump_to_name != "" ) )
{
#ifdef DEBUG
cout << "replacing a @0xHHHH (absolute load/jump) [" << instruction << "] --> [";
#endif
instruction.replace(instruction.find(string("0x")),6,string("&")+jump_to_name);
#ifdef DEBUG
cout << instruction << "]" << endl;
#endif
retVal=true;
}
}
return retVal;
}
bool mnemonic::processLabel()
{
bool retVal=false;
if( relative_jump )
{
jump_to_address=(address + 2 + (toTwosComp(bytes[1])));
retVal=true;
}
else if( absolute_jump || absolute_load )
{
jump_to_address = 256*bytes[size-1]+bytes[size-2];
retVal=true;
}
return retVal;
}
ostream & operator << (ostream &out, const mnemonic &m)
{
out << "\t";
if( !code_only )
{
if( show_instruction_number ) out << std::dec << m.instruction_number << ": ";
if( show_address ) out << std::hex << m.address << " | ";
if( show_opcodes )
{
//out << "| ";
for( int i=0; i<m.size; i++)
{
out << std::hex << std::setfill('0') << std::setw(2) << (int)m.bytes[i] << " | ";
}
for( int i=(4-m.size); i>0; i-- )
{
out << "-- | ";
}
}
if( show_ticks ) out << "(" << std::dec << std::setw(2) << m.ticks << std::hex << ") | ";
}
if( code_only ) out << "\t";
out << m.instruction;
if( (m.absolute_jump || m.relative_jump || m.absolute_load) && !code_only )
{
if( m.relative_jump ) out << "; [relative " << std::to_string(toTwosComp(m.bytes[1])) << "]";
if( m.absolute_jump ) out << "; [absolute]";
//out << ";] --> ";
//out << m.address + 2 + (toTwosComp(m.bytes[1]));
//out << m.jump_to_address;
}
out << endl;
return out;
}
mnemonic::mnemonic()
{
#ifdef DEBUG
cerr << "creating an empty data byte" << endl;
#endif
jump_to_address=0;
jump_to_name=string("");
ticks=0;
size=0;
instruction=string("");
valid=false;
bytes_only=false;
}
// 4 BYTE OPCODES
mnemonic::mnemonic( unsigned char a, unsigned char b, unsigned char c, unsigned char d )
{
#ifdef DEBUG
cerr << "created mnemonic( " << (int)a << " , " << (int)b << " , " << (int)c << " , " << (int)d << " );" << endl;
#endif
jump_to_address=0;
jump_to_name=string("");
bytes_only=false;
ticks=0;
size=4;
valid=true;
bytes[0]=a; bytes[1]=b; bytes[2]=c; bytes[3]=d;
relative_jump=false;
absolute_jump=false;
absolute_load=false;
switch(a)
{
case 0xDD:
switch(b)
{
case 0x21:
instruction=string("ld ix, ") + dec2Hex(d*256+c,4);
ticks=14;
//absolute_load=true;
break;
case 0x22:
instruction=string("ld (")+ dec2Hex(d*256+c,4) + "), ix";
ticks=20;
absolute_load=true;
break;
case 0x2A:
instruction=string("ld ix, (") + dec2Hex(d*256+c,4) + ")";
ticks=20;
absolute_load=true;
break;
case 0x36:
instruction=string("ld (ix+") + dec2Hex(c,2) + "), " + dec2Hex(d,2);
break;
case 0xCB:
switch(d)
{
case 0x00:
instruction=string("rlc (ix+") + dec2Hex(c,2) + "), b";
ticks=23;
break;
case 0x01:
instruction=string("rlc (ix+") + dec2Hex(c,2) + "), c";
ticks=23;
break;
case 0x02:
instruction=string("rlc (ix+") + dec2Hex(c,2) + "), d";
ticks=23;
break;
case 0x03:
instruction=string("rlc (ix+") + dec2Hex(c,2) + "), e";
ticks=23;
break;
case 0x04:
instruction=string("rlc (ix+") + dec2Hex(c,2) + "), h";
ticks=23;
break;
case 0x05:
instruction=string("rlc (ix+") + dec2Hex(c,2) + "), l";
ticks=23;
break;
case 0x06:
instruction=string("rlc (ix+") + dec2Hex(c,2) + ")";
ticks=23;
break;
case 0x07:
instruction=string("rlc (ix+") + dec2Hex(c,2) + "), a";
ticks=23;
break;
case 0x08:
instruction=string("rrc (ix+") + dec2Hex(c,2) + "), b";
ticks=23;
break;
case 0x09:
instruction=string("rrc (ix+") + dec2Hex(c,2) + "), c";
ticks=23;
break;
case 0x0A:
instruction=string("rrc (ix+") + dec2Hex(c,2) + "), d";
ticks=23;
break;
case 0x0B:
instruction=string("rrc (ix+") + dec2Hex(c,2) + "), e";
ticks=23;
break;
case 0x0C:
instruction=string("rrc (ix+") + dec2Hex(c,2) + "), h";
ticks=23;
break;
case 0x0D:
instruction=string("rrc (ix+") + dec2Hex(c,2) + "), l";
ticks=23;
break;
case 0x0E:
instruction=string("rrc (ix+") + dec2Hex(c,2) + ")";
ticks=23;
break;
case 0x0F:
instruction=string("rrc (ix+") + dec2Hex(c,2) + "), a";
ticks=23;
break;
// ================
case 0x10:
instruction=string("rl (ix+") + dec2Hex(c,2) + "), b";
ticks=23;
break;
case 0x11:
instruction=string("rl (ix+") + dec2Hex(c,2) + "), c";
ticks=23;
break;
case 0x12:
instruction=string("rl (ix+") + dec2Hex(c,2) + "), d";
ticks=23;
break;
case 0x13:
instruction=string("rl (ix+") + dec2Hex(c,2) + "), e";
ticks=23;
break;
case 0x14:
instruction=string("rl (ix+") + dec2Hex(c,2) + "), h";
ticks=23;
break;
case 0x15:
instruction=string("rl (ix+") + dec2Hex(c,2) + "), l";
ticks=23;
break;
case 0x16:
instruction=string("rl (ix+") + dec2Hex(c,2) + ")";
ticks=23;
break;
case 0x17:
instruction=string("rl (ix+") + dec2Hex(c,2) + "), a";
ticks=23;
break;
case 0x18:
instruction=string("rr (ix+") + dec2Hex(c,2) + "), b";
ticks=23;
break;
case 0x19:
instruction=string("rr (ix+") + dec2Hex(c,2) + "), c";
ticks=23;
break;
case 0x1A:
instruction=string("rr (ix+") + dec2Hex(c,2) + "), d";
ticks=23;
break;
case 0x1B:
instruction=string("rr (ix+") + dec2Hex(c,2) + "), e";
ticks=23;
break;
case 0x1C:
instruction=string("rr (ix+") + dec2Hex(c,2) + "), h";
ticks=23;
break;
case 0x1D:
instruction=string("rr (ix+") + dec2Hex(c,2) + "), l";
ticks=23;
break;
case 0x1E:
instruction=string("rr (ix+") + dec2Hex(c,2) + ")";
ticks=23;
break;
case 0x1F:
instruction=string("rr (ix+") + dec2Hex(c,2) + "), a";
ticks=23;
break;
// ================
case 0x20:
instruction=string("sla (ix+") + dec2Hex(c,2) + "), b";
ticks=23;
break;
case 0x21:
instruction=string("sla (ix+") + dec2Hex(c,2) + "), c";
ticks=23;
break;
case 0x22:
instruction=string("sla (ix+") + dec2Hex(c,2) + "), d";
ticks=23;
break;
case 0x23:
instruction=string("sla (ix+") + dec2Hex(c,2) + "), e";
ticks=23;
break;
case 0x24:
instruction=string("sla (ix+") + dec2Hex(c,2) + "), h";
ticks=23;
break;
case 0x25:
instruction=string("sla (ix+") + dec2Hex(c,2) + "), l";
ticks=23;
break;
case 0x26:
instruction=string("sla (ix+") + dec2Hex(c,2) + ")";
ticks=23;
break;
case 0x27:
instruction=string("sla (ix+") + dec2Hex(c,2) + "), a";
ticks=23;
break;
case 0x28:
instruction=string("sra (ix+") + dec2Hex(c,2) + "), b";
ticks=23;
break;
case 0x29:
instruction=string("sra (ix+") + dec2Hex(c,2) + "), c";
ticks=23;
break;
case 0x2A:
instruction=string("sra (ix+") + dec2Hex(c,2) + "), d";
ticks=23;
break;
case 0x2B:
instruction=string("sra (ix+") + dec2Hex(c,2) + "), e";
ticks=23;
break;
case 0x2C:
instruction=string("sra (ix+") + dec2Hex(c,2) + "), h";
ticks=23;
break;
case 0x2D:
instruction=string("sra (ix+") + dec2Hex(c,2) + "), l";
ticks=23;
break;
case 0x2E:
instruction=string("sra (ix+") + dec2Hex(c,2) + ")";
ticks=23;
break;
case 0x2F:
instruction=string("sra (ix+") + dec2Hex(c,2) + "), a";
ticks=23;
break;
// ================
case 0x30:
instruction=string("sll (ix+") + dec2Hex(c,2) + "), b";
ticks=23;
break;
case 0x31:
instruction=string("sll (ix+") + dec2Hex(c,2) + "), c";
ticks=23;
break;
case 0x32:
instruction=string("sll (ix+") + dec2Hex(c,2) + "), d";
ticks=23;
break;
case 0x33:
instruction=string("sll (ix+") + dec2Hex(c,2) + "), e";
ticks=23;
break;
case 0x34:
instruction=string("sll (ix+") + dec2Hex(c,2) + "), h";
ticks=23;
break;
case 0x35:
instruction=string("sll (ix+") + dec2Hex(c,2) + "), l";
ticks=23;
break;
case 0x36:
instruction=string("sll (ix+") + dec2Hex(c,2) + ")";
ticks=23;
break;
case 0x37:
instruction=string("sll (ix+") + dec2Hex(c,2) + "), a";
ticks=23;
break;
case 0x38:
instruction=string("srl (ix+") + dec2Hex(c,2) + "), b";
ticks=23;
break;
case 0x39:
instruction=string("srl (ix+") + dec2Hex(c,2) + "), c";
ticks=23;
break;
case 0x3A:
instruction=string("srl (ix+") + dec2Hex(c,2) + "), d";
ticks=23;
break;
case 0x3B:
instruction=string("srl (ix+") + dec2Hex(c,2) + "), e";
ticks=23;
break;
case 0x3C:
instruction=string("srl (ix+") + dec2Hex(c,2) + "), h";
ticks=23;
break;
case 0x3D:
instruction=string("srl (ix+") + dec2Hex(c,2) + "), l";
ticks=23;
break;
case 0x3E:
instruction=string("srl (ix+") + dec2Hex(c,2) + ")";
ticks=23;
break;
case 0x3F:
instruction=string("srl (ix+") + dec2Hex(c,2) + "), a";
ticks=23;
break;
// ================
case 0x40:
case 0x41:
case 0x42:
case 0x43:
case 0x44:
case 0x45:
case 0x46:
case 0x47:
instruction=string("bit 0, (ix+") + dec2Hex(c,2) + ")";
ticks=20;
break;
case 0x48:
case 0x49:
case 0x4A:
case 0x4B:
case 0x4C:
case 0x4D:
case 0x4E:
case 0x4F:
instruction=string("bit 1, (ix+") + dec2Hex(c,2) + ")";
ticks=20;
break;
// =======================
case 0x50:
case 0x51:
case 0x52:
case 0x53:
case 0x54:
case 0x55:
case 0x56:
case 0x57:
instruction=string("bit 2, (ix+") + dec2Hex(c,2) + ")";
ticks=20;
break;
case 0x58:
case 0x59:
case 0x5A:
case 0x5B:
case 0x5C:
case 0x5D:
case 0x5E:
case 0x5F:
instruction=string("bit 3, (ix+") + dec2Hex(c,2) + ")";
ticks=20;
break;
// =======================
case 0x60:
case 0x61:
case 0x62:
case 0x63:
case 0x64:
case 0x65:
case 0x66:
case 0x67:
instruction=string("bit 4, (ix+") + dec2Hex(c,2) + ")";
ticks=20;
break;
case 0x68:
case 0x69:
case 0x6A:
case 0x6B:
case 0x6C:
case 0x6D:
case 0x6E:
case 0x6F:
instruction=string("bit 5, (ix+") + dec2Hex(c,2) + ")";
ticks=20;
break;
// =======================
case 0x70:
case 0x71:
case 0x72:
case 0x73:
case 0x74:
case 0x75:
case 0x76:
case 0x77:
instruction=string("bit 6, (ix+") + dec2Hex(c,2) + ")";
ticks=20;
break;
case 0x78:
case 0x79:
case 0x7A:
case 0x7B:
case 0x7C:
case 0x7D:
case 0x7E:
case 0x7F:
instruction=string("bit 7, (ix+") + dec2Hex(c,2) + ")";
ticks=20;
break;
// =======================
case 0x80:
case 0x81:
case 0x82:
case 0x83:
case 0x84:
case 0x85:
case 0x86:
case 0x87:
instruction=string("res 0, (ix+") + dec2Hex(c,2) + ")";
ticks=23;
break;
case 0x88:
case 0x89:
case 0x8A:
case 0x8B:
case 0x8C:
case 0x8D:
case 0x8E:
case 0x8F:
instruction=string("res 1, (ix+") + dec2Hex(c,2) + ")";
ticks=23;
break;
// =======================
case 0x90:
case 0x91:
case 0x92:
case 0x93:
case 0x94:
case 0x95:
case 0x96:
case 0x97:
instruction=string("res 2, (ix+") + dec2Hex(c,2) + ")";
ticks=23;
break;
case 0x98:
case 0x99:
case 0x9A:
case 0x9B:
case 0x9C:
case 0x9D:
case 0x9E:
case 0x9F:
instruction=string("res 3, (ix+") + dec2Hex(c,2) + ")";
ticks=23;
break;
// =======================
case 0xA0:
case 0xA1:
case 0xA2:
case 0xA3:
case 0xA4:
case 0xA5:
case 0xA6:
case 0xA7:
instruction=string("res 4, (ix+") + dec2Hex(c,2) + ")";
ticks=23;
break;
case 0xA8:
case 0xA9:
case 0xAA:
case 0xAB:
case 0xAC:
case 0xAD:
case 0xAE:
case 0xAF:
instruction=string("res 5, (ix+") + dec2Hex(c,2) + ")";
ticks=23;
break;
// =======================
case 0xB0:
case 0xB1:
case 0xB2:
case 0xB3:
case 0xB4:
case 0xB5:
case 0xB6:
case 0xB7:
instruction=string("res 6, (ix+") + dec2Hex(c,2) + ")";
ticks=23;
break;
case 0xB8:
case 0xB9:
case 0xBA:
case 0xBB:
case 0xBC:
case 0xBD:
case 0xBE:
case 0xBF:
instruction=string("res 7, (ix+") + dec2Hex(c,2) + ")";
ticks=23;
break;
// =======================
case 0xC0:
case 0xC1:
case 0xC2:
case 0xC3:
case 0xC4:
case 0xC5:
case 0xC6:
case 0xC7:
instruction=string("set 0, (ix+") + dec2Hex(c,2) + ")";
ticks=23;
break;
case 0xC8:
case 0xC9:
case 0xCA:
case 0xCB:
case 0xCC:
case 0xCD:
case 0xCE:
case 0xCF:
instruction=string("set 1, (ix+") + dec2Hex(c,2) + ")";
ticks=23;
break;
// =======================
case 0xD0:
case 0xD1:
case 0xD2:
case 0xD3:
case 0xD4:
case 0xD5:
case 0xD6:
case 0xD7:
instruction=string("set 2, (ix+") + dec2Hex(c,2) + ")";
ticks=23;
break;
case 0xD8:
case 0xD9:
case 0xDA:
case 0xDB:
case 0xDC:
case 0xDD:
case 0xDE:
case 0xDF:
instruction=string("set 3, (ix+") + dec2Hex(c,2) + ")";
ticks=23;
break;
// =======================
case 0xE0:
case 0xE1:
case 0xE2:
case 0xE3:
case 0xE4:
case 0xE5:
case 0xE6:
case 0xE7:
instruction=string("set 4, (ix+") + dec2Hex(c,2) + ")";
ticks=23;
break;
case 0xE8:
case 0xE9:
case 0xEA:
case 0xEB:
case 0xEC:
case 0xED:
case 0xEE:
case 0xEF:
instruction=string("set 5, (ix+") + dec2Hex(c,2) + ")";
ticks=23;
break;
// =======================
case 0xF0:
case 0xF1:
case 0xF2:
case 0xF3:
case 0xF4:
case 0xF5:
case 0xF6:
case 0xF7:
instruction=string("set 6, (ix+") + dec2Hex(c,2) + ")";
ticks=23;
break;
case 0xF8:
case 0xF9:
case 0xFA:
case 0xFB:
case 0xFC:
case 0xFD:
case 0xFE:
case 0xFF:
instruction=string("set 7, (ix+") + dec2Hex(c,2) + ")";
ticks=23;
break;
// =======================
default:
instruction="invalid";
valid=false;
size=0;
break;
}
break;
default:
instruction="invalid";
valid=false;
size=0;
}
break;
case 0xED:
switch(b)
{