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main.c
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//@ @\\
//@ _ _ _ _ _ _ _ @\\
//@ /\ \ /\ \ / /\ / /\ / /\ /\_\/\_\ _ @\\
//@ / \ \____ \ \ \ / / \ / / \ / / \ / / / / //\_\ @\\
//@ / /\ \_____\ /\ \_\ / / /\ \__ / / /\ \ / / /\ \__ /\ \/ \ \/ / / @\\
//@ / / /\/___ / / /\/_/ / / /\ \___\ / / /\ \ \ / / /\ \___\ / \____\__/ / @\\
//@ / / / / / / / / / \ \ \ \/___// / / \ \ \ \ \ \ \/___// /\/________/ @\\
//@ / / / / / / / / / \ \ \ / / /___/ /\ \ \ \ \ / / /\/_// / / @\\
//@ / / / / / / / / / _ \ \ \ / / /_____/ /\ \ _ \ \ \ / / / / / / @\\
//@ \ \ \__/ / /___/ / /__ /_/\__/ / / / /_________/\ \ \ /_/\__/ / / / / / / / / @\\
//@ \ \___\/ //\__\/_/___\\ \/___/ / / / /_ __\ \_\\ \/___/ / \/_/ / / / @\\
//@ \/_____/ \/_________/ \_____\/ \_\___\ /____/_/ \_____\/ \/_/ @\\
//@ @\\
//@ @\\
//@ DisASM @\\
//@ @ Vlad Salnikov (XXXRef), 2013 @\\
//@ xxxref.com @\\
//@ @\\
#include <stdio.h>
#include <windows.h>
#include "command_format.h"
#define MAX_COMMAND_LEN 15
#define RET_SUCCESS 0
#define RET_ERROR 1
#define RET_FILE_END 2
#define LINE_LEN 62
#define OPCODE_FIELD_OFFSET 0
#define EXT_FIELD_OFFSET 33
#define MODRM_FIELD_OFFSET 25
#define DESCRIPTION_FIELD_OFFSET 40
//====================================================================================================
char* SByte2Char(UByte*bp){
char*mp;
mp=(char*)malloc(9);//mem allocating
mp[0]=(char)bp->ubyte.bit7+'0';
mp[1]=(char)bp->ubyte.bit6+'0';
mp[2]=(char)bp->ubyte.bit5+'0';
mp[3]=(char)bp->ubyte.bit4+'0';
mp[4]=(char)bp->ubyte.bit3+'0';
mp[5]=(char)bp->ubyte.bit2+'0';
mp[6]=(char)bp->ubyte.bit1+'0';
mp[7]=(char)bp->ubyte.bit0+'0';
mp[8]=0;
return mp;
}
//====================================================================================================
int FindCommand(FILE*f,char*p,char*modrm){
int text_counter=0,opcode_counter=0;
char buf,buf2;
while(1){
fseek(f,text_counter,SEEK_SET);
if(feof(f)){
return -1;
}
while(1){
fread(&buf,1,1,f);
//printf("\tbuf:%c text_counter:%d\n",buf,text_counter);
//getch();
if(p[opcode_counter]==0){
if(buf!=' ' && buf!='|'){
//printf("\tNOT FOUND 1\n");
opcode_counter=0;
break;
}
//now modrm testing
//printf("\t\tStarting to tezt reg field:\n");
fseek(f,text_counter+MODRM_FIELD_OFFSET,SEEK_SET);//check is modrm present
fread(&buf,1,1,f);
if(buf==' '){//modrm isnt here
return text_counter;
}
if(buf=='m'){//md
if((modrm[0]=='1')&&(modrm[1]=='1')){
opcode_counter=0;
break;
}
}else{//11
if(buf==modrm[0]){
fread(&buf,1,1,f);
if(buf!=modrm[1]){
opcode_counter=0;
break;
}
}else{
opcode_counter=0;
break;
}
}
fseek(f,text_counter+MODRM_FIELD_OFFSET+3,SEEK_SET);//+3 for reg/opcode field
fread(&buf,1,1,f);
if(buf!='0' && buf!='1'){
//printf("FindCommand:2\n");
return text_counter;
}
if(modrm[2]!=buf){
opcode_counter=0;
//printf("\tNOT FOUND -2\n");
break;
}
fread(&buf,1,1,f);
if(modrm[3]!=buf){
opcode_counter=0;
//printf("\tNOT FOUND 3\n");
break;
}
fread(&buf,1,1,f);
if(modrm[4]!=buf){
opcode_counter=0;
//printf("\tNOT FOUND 4\n");
break;
}
//printf("FindCommand:3\n");
return text_counter;
}
if((buf!=p[opcode_counter]) && (buf=='0' || buf=='1' || buf==' ')){
//printf("\tNOT FOUND 5 opcode_counter:%d text_counter=%d\n\t\tbuf=%c p=%c\n",opcode_counter,text_counter,buf,p[opcode_counter]);
opcode_counter=0;
break;
}
if(buf=='f'){//pop s - push s processing
fseek(f,ftell(f)+3,SEEK_SET);//0-push,1-pop
fread(&buf,1,1,f);
if(buf=='1'){//pop
if(((p[opcode_counter]-'0')==0)&&((p[opcode_counter+1]-'0')==1)){//01-cs
opcode_counter=0;
break;
}
}
fseek(f,ftell(f)-3,SEEK_SET);
opcode_counter++;
}
if(buf=='u'){//uuu-sreg3 //pop s
buf2=(p[opcode_counter]-'0')*4+(p[opcode_counter+1]-'0')*2+p[opcode_counter+2]-'0';
if((buf2!=4)&&(buf2!=5)){//buf2!=100(fs) & buf2!=101(gs)
opcode_counter=0;
break;
}
fread(&buf,1,1,f);
fread(&buf,1,1,f);
opcode_counter+=2;
}
opcode_counter++;
}
text_counter+=LINE_LEN;
while(1){//comments
fseek(f,text_counter,SEEK_SET);
if(fread(&buf,1,1,f)==0){//file end
return -1;
}
//printf("\t2) buf:%c text_counter:%d\n",buf,text_counter);
if(buf!=';'){
// printf("\tbrokenhearted\n");
break;
}
text_counter+=LINE_LEN;
}
}
}
//====================================================================================================
int ParsePrefixes(SCommand*cp,const unsigned char*mp,int count){
char buf=0;
int bytecounter=0;
while(bytecounter<count){
//buf is used as flag that we can exit from while
switch(mp[bytecounter]){
//1 group
case 0x66://redefinition of operand size
cp->prefix.opr=0x66;//setting flag
break;
//2 group
case 0x67://redefinition of address size
cp->prefix.sr=0x67;//setting flag
break;
//3 group
case 0xF0://LOCK
case 0xF2://REPNZ
case 0xF3://REP
cp->prefix.lnr=mp[bytecounter];//setting flag
break;
//4 group
case 0x2E: //CS
case 0x36://SS
case 0x3E: //DS
case 0x26://ES
case 0x64://FS
case 0x65://GS
cp->prefix.segr=mp[bytecounter];//setting flag
break;
default:
buf=1;
}
if(buf==1){//exit
break;
}
cp->prefix.prefixcount++;
cp->prefix.p=(char*)realloc(cp->prefix.p,cp->prefix.prefixcount);
cp->prefix.p[cp->prefix.prefixcount-1]=mp[bytecounter];
bytecounter++;
}
if(bytecounter==count){
return RET_ERROR;
}
return RET_SUCCESS;
}
//====================================================================================================
void Print(const SCommand*cp){
int i=0;
printf("SCommand:\n");
printf("PREFIX:\n");//prefix
printf("\tprefixcount:%d\n",cp->prefix.prefixcount);
printf("\tp:");
while(i<cp->prefix.prefixcount){
printf(" %x",cp->prefix.p[i]);
i++;
}
printf("\n");
printf("\tlnr:%x\n",cp->prefix.lnr);
printf("\tsegr:%x\n",cp->prefix.segr);
printf("\topr:%x\n",cp->prefix.opr);
printf("\tsr:%x\n",cp->prefix.sr);
printf("OPCODE:\n");//opcodes
printf("\tbytenum:%d\n",cp->opcode.bytenum);
printf("\thex_bytes:");
i=0;
while(i<cp->opcode.bytenum){
printf(" %#X",cp->opcode.hex_bytes[i]);
i++;
}
printf("\n");
printf("\tbytes:%s\n",cp->opcode.bytes);
printf("EXT:\n");
printf("\tw=%d s=%d d=%d reg=%d eee=%d uuu=%d ff=%d tttn=%d\n",cp->sf.w,cp->sf.s,cp->sf.d,cp->sf.reg,cp->sf.eee,cp->sf.uuu,cp->sf.ff,cp->sf.tttn);
printf("MODRM:\n");
printf("\tmodrm:%#X mod:%d reg:%d rm:%d\n",cp->modrm.modrm,cp->modrm.mod,cp->modrm.reg,cp->modrm.rm);
printf("Command:\n");
printf("\tcom_text:%s\n",cp->com_text);
printf("\tpar:%s parcount:%d\n",cp->par,cp->par_count);
i=0;
printf("\tparameters:\n");
while(i<cp->par_count){
printf("\t\t%d: %s\n",i,cp->parameters[i]);
i++;
}
printf("\nRESULT: %s",cp->com_text);//printing result
if(cp->par_count!=0){
printf(" %s",cp->parameters[0]);
i=1;
while(i<cp->par_count){
printf(", %s",cp->parameters[i]);
i++;
}
}
printf("\n");
}
//====================================================================================================
int GetCommand(SCommand*cp,FILE*hFile){
UByte temp_byte;
FILE*hFileOpcodes;
int bytecounter=0,temp_int,ext_len=0,counter=0,com_len,com_len1;
unsigned char*mp,*temp_char,*temp_char1,*temp_char2,*temp_char3;
unsigned char buf,buf2;
//printf("Begin GetCommand:\n");
SCommandInit(cp);
if((hFileOpcodes=fopen("res/opcodes.ttt","rb"))==0){
printf("\tError: cant open \"opcodes.ttt\"\n");
return RET_ERROR;
}
mp=(unsigned char*)malloc(MAX_COMMAND_LEN);//mem allocating
com_len1=fread(mp,1,MAX_COMMAND_LEN,hFile);//reading data block, !file pointer+=MAX_COMMAND_LEN!
if(com_len1==0){//file end
return RET_FILE_END;
}
//printf("\"prefixes.ttt\" opened\n");
/*------------------------------------------------------------prefix parsing------------------------------------------------------*/
if(ParsePrefixes(cp,mp,com_len1)==RET_ERROR){
printf("\tError: invalid command\n");
return RET_ERROR;
}
bytecounter+=cp->prefix.prefixcount;
/*------------------------------------------------------------prefix parsing------------------------------------------------------*/
/*------------------------------------------------------------command finding-----------------------------------------------------*/
#ifdef _DEBUG
printf("\tCommand finding:\n");
#endif
buf=0;//like current command byte counter
while(buf<3){//coz buf=0
temp_byte.byte=mp[bytecounter];
temp_char=SByte2Char(&temp_byte);
strcpy(cp->opcode.bytes+buf*8,temp_char);
cp->opcode.hex_bytes[buf]=mp[bytecounter];
cp->opcode.bytenum++;
free(temp_char);
bytecounter++;
temp_byte.byte=mp[bytecounter];//possible modrm
temp_char=SByte2Char(&temp_byte);
#ifdef _DEBUG
printf("\t\tPossible opcode:%s possible modrm:%s\n",cp->opcode.bytes,temp_char);
#endif
if((temp_int=FindCommand(hFileOpcodes,cp->opcode.bytes,temp_char))!=-1){//command found
break;//we can exit, buf<4
}
buf++;
}
if(buf==3){//command not found
printf("\tError:command not found!\n");
fclose(hFileOpcodes);
return RET_ERROR;
}
//now in temp_int command position
#ifdef _DEBUG
printf("\tCommand position:%d\n",temp_int);
#endif
/*------------------------------------------------------------command finding-----------------------------------------------------*/
/*------------------------------------------------------------ext parsing---------------------------------------------------------*/
fseek(hFileOpcodes,temp_int,SEEK_SET);//fp on command field
ext_len=0;
while(1){
fread(&buf,1,1,hFileOpcodes);
if(buf==' '){//cell end
break;
}
switch(buf){
case 's'://s
cp->sf.s=cp->opcode.bytes[ext_len]-'0';
break;
case 'w'://w
cp->sf.w=cp->opcode.bytes[ext_len]-'0';
break;
case 'd'://d
cp->sf.d=cp->opcode.bytes[ext_len]-'0';
break;
case 'r'://reg
cp->sf.reg=(cp->opcode.bytes[ext_len]-'0')*4+(cp->opcode.bytes[ext_len+1]-'0')*2+(cp->opcode.bytes[ext_len+2]-'0');
ext_len+=2;
fread(&buf,1,1,hFileOpcodes);
fread(&buf,1,1,hFileOpcodes);
break;
case 't'://tttn
cp->sf.tttn=(cp->opcode.bytes[ext_len]-'0')*8+(cp->opcode.bytes[ext_len+1]-'0')*4+(cp->opcode.bytes[ext_len+2]-'0')*2+(cp->opcode.bytes[ext_len+3]-'0');
ext_len+=3;
fread(&buf,1,1,hFileOpcodes);
fread(&buf,1,1,hFileOpcodes);
fread(&buf,1,1,hFileOpcodes);
break;
case 'e'://eee special purpose registers (cr, dr)
cp->sf.eee=(cp->opcode.bytes[ext_len]-'0')*4+(cp->opcode.bytes[ext_len+1]-'0')*2+(cp->opcode.bytes[ext_len+2]-'0');
ext_len+=2;
fread(&buf,1,1,hFileOpcodes);
fread(&buf,1,1,hFileOpcodes);
break;
case 'f'://ff-sreg2(2 bits)
cp->sf.ff=(cp->opcode.bytes[ext_len]-'0')*2+(cp->opcode.bytes[ext_len+1]-'0');
ext_len+=1;
fread(&buf,1,1,hFileOpcodes);
break;
case 'u'://uuu-sreg3(3 bits)
cp->sf.uuu=(cp->opcode.bytes[ext_len]-'0')*4+(cp->opcode.bytes[ext_len+1]-'0')*2+(cp->opcode.bytes[ext_len+2]-'0');
ext_len+=2;
fread(&buf,1,1,hFileOpcodes);
fread(&buf,1,1,hFileOpcodes);
break;
/*default:
printf("\tError:cant find ext. buf=%c\n",buf);
getch();
return -1;*/
}
ext_len++;
}
/*------------------------------------------------------------ext parsing---------------------------------------------------------*/
/*----------------------------------------------------------modrm parsing---------------------------------------------------------*/
fseek(hFileOpcodes,temp_int+MODRM_FIELD_OFFSET,SEEK_SET);//check modrm is present
fread(&buf,1,1,hFileOpcodes);
if(buf!=' '){//modrm is here
cp->modrm.modrm=mp[bytecounter];
cp->modrm.mod=(temp_char[0]-'0')*2+(temp_char[1]-'0');
cp->modrm.reg=(temp_char[2]-'0')*4+(temp_char[3]-'0')*2+(temp_char[4]-'0');
cp->modrm.rm=(temp_char[5]-'0')*4+(temp_char[6]-'0')*2+(temp_char[7]-'0');
bytecounter++;
}
free(temp_char);//temp_char:possible modrm
#ifdef _DEBUG
printf("\tMODRM:mod:%d reg:%d rm:%d\n",cp->modrm.mod,cp->modrm.reg,cp->modrm.rm);
#endif
/*----------------------------------------------------------modrm parsing---------------------------------------------------------*/
/*--------------------------------------------------------command parsing---------------------------------------------------------*/
fseek(hFileOpcodes,temp_int+DESCRIPTION_FIELD_OFFSET,SEEK_SET);
//printf("\tfseek=%d temp_int+DESCRIPTION_FIELD_OFFSET=%d\n",ftell(hFileOpcodes),temp_int+DESCRIPTION_FIELD_OFFSET);
ext_len=0;
while(1){//readindg command
fread(&buf,1,1,hFileOpcodes);
if(buf==' '){
break;
}
cp->com_text=(char*)realloc( cp->com_text,ext_len+2);
cp->com_text[ext_len]=buf;
ext_len++;
}
cp->com_text[ext_len]=0;
#ifdef _DEBUG
printf("\tcom_text:%s\n",cp->com_text);
#endif
/*--------------------------------------------------------command parsing---------------------------------------------------------*/
/*--------------------------------------------------------operand parsing---------------------------------------------------------*/
//operands reading------------
ext_len=0;
while(1){
cp->par=(char*)realloc(cp->par,ext_len+2);
fread(&buf,1,1,hFileOpcodes);
if(buf==' '){// no operands | file end
break;
}
cp->par[ext_len]=buf;
cp->par_count++;
ext_len++;
}
cp->par[ext_len]=0;
//exchanging if d==0---------------------
if((cp->sf.d==0) && (cp->par_count>=2)){//exchanging ('d' field) if not immediate as 1st par
if(cp->par[1]!='i'){
buf=cp->par[1];
cp->par[1]=cp->par[0];
cp->par[0]=buf;
}
}
cp->parameters=(char**)malloc(sizeof(char*)*(cp->par_count));//memory allocating
ext_len=0;
while(ext_len<cp->par_count){
cp->parameters[ext_len]=(char*)malloc(40);//[eax+ebx*1+0FFFFFFFF],0
ext_len++;
}
//printf("DEBUG");
//-----------------------------------------------operands parsing----------------------------------------------------------------------------------------------------------------------------------------------------------
while(counter<cp->par_count){
switch(cp->par[counter]){
case 'r'://reg1
if(cp->sf.reg!=-128){//reg (reg field is always last 3 bytes of opcode)
ext_len=cp->sf.reg;
//printf("\t\tpos in ret:%d temp_char:%s\n",Find(hFileRet,temp_char1),temp_char1);
}else{//search in mod/opcode section
fseek(hFileOpcodes,temp_int+MODRM_FIELD_OFFSET+3,SEEK_SET);//fp on mod/opcode section
fread(&buf,1,1,hFileOpcodes);
if(buf=='r'){
//check if reg1
fseek(hFileOpcodes,temp_int+MODRM_FIELD_OFFSET+6,SEEK_SET);
fread(&buf,1,1,hFileOpcodes);
if(buf=='1' || buf==' '){//reg1 | reg
ext_len=cp->modrm.reg;
}else{//reg1 in rm section
ext_len=cp->modrm.rm;
}
}else{//reg1 in rm section
ext_len=cp->modrm.rm;
}
}
//in ext_len number of register
switch(ext_len){
case 0://al ax eax
if(cp->sf.w==0){
cp->parameters[counter][0]='a';
cp->parameters[counter][1]='l';
cp->parameters[counter][2]=0;
}else{
if(cp->prefix.opr==0x66){//66h - operand-size prefix
cp->parameters[counter][0]='a';
cp->parameters[counter][1]='x';
cp->parameters[counter][2]=0;
break;
}else{
cp->parameters[counter][0]='e';
cp->parameters[counter][1]='a';
cp->parameters[counter][2]='x';
cp->parameters[counter][3]=0;
}
}
break;
case 1://ecx
if(cp->sf.w==0){
cp->parameters[counter][0]='c';
cp->parameters[counter][1]='l';
cp->parameters[counter][2]=0;
}else{
if(cp->prefix.opr==0x66){//66h - operand-size prefix
cp->parameters[counter][0]='c';
cp->parameters[counter][1]='x';
cp->parameters[counter][2]=0;
break;
}else{
cp->parameters[counter][0]='e';
cp->parameters[counter][1]='c';
cp->parameters[counter][2]='x';
cp->parameters[counter][3]=0;
}
}
break;
case 2://edx
if(cp->sf.w==0){
cp->parameters[counter][0]='d';
cp->parameters[counter][1]='l';
cp->parameters[counter][2]=0;
}else{
if(cp->prefix.opr==0x66){//66h - operand-size prefix
cp->parameters[counter][0]='d';
cp->parameters[counter][1]='x';
cp->parameters[counter][2]=0;
break;
}else{
cp->parameters[counter][0]='e';
cp->parameters[counter][1]='d';
cp->parameters[counter][2]='x';
cp->parameters[counter][3]=0;
}
}
break;
case 3://ebx
if(cp->sf.w==0){
cp->parameters[counter][0]='b';
cp->parameters[counter][1]='l';
cp->parameters[counter][2]=0;
}else{
if(cp->prefix.opr==0x66){//66h - operand-size prefix
cp->parameters[counter][0]='b';
cp->parameters[counter][1]='x';
cp->parameters[counter][2]=0;
break;
}else{
cp->parameters[counter][0]='e';
cp->parameters[counter][1]='b';
cp->parameters[counter][2]='x';
cp->parameters[counter][3]=0;
}
}
break;
case 4://esp
if(cp->sf.w==0){
cp->parameters[counter][0]='s';
cp->parameters[counter][1]='d';
cp->parameters[counter][2]=0;
}else{
if(cp->prefix.opr==0x66){//66h - operand-size prefix
cp->parameters[counter][0]='s';
cp->parameters[counter][1]='p';
cp->parameters[counter][2]=0;
break;
}else{
cp->parameters[counter][0]='e';
cp->parameters[counter][1]='s';
cp->parameters[counter][2]='p';
cp->parameters[counter][3]=0;
}
}
break;
case 5://ebp
if(cp->sf.w==0){
cp->parameters[counter][0]='b';
cp->parameters[counter][1]='d';
cp->parameters[counter][2]=0;
}else{
if(cp->prefix.opr==0x66){//66h - operand-size prefix
cp->parameters[counter][0]='b';
cp->parameters[counter][1]='p';
cp->parameters[counter][2]=0;
break;
}else{
cp->parameters[counter][0]='e';
cp->parameters[counter][1]='b';
cp->parameters[counter][2]='p';
cp->parameters[counter][3]=0;
}
}
break;
case 6://esi
if(cp->sf.w==0){
cp->parameters[counter][0]='e';
cp->parameters[counter][1]='d';
cp->parameters[counter][2]=0;
}else{
if(cp->prefix.opr==0x66){//66h - operand-size prefix
cp->parameters[counter][0]='s';
cp->parameters[counter][1]='i';
cp->parameters[counter][2]=0;
break;
}else{
cp->parameters[counter][0]='e';
cp->parameters[counter][1]='s';
cp->parameters[counter][2]='i';
cp->parameters[counter][3]=0;
}
}
break;
case 7://edi
if(cp->sf.w==0){
cp->parameters[counter][0]='d';
cp->parameters[counter][1]='d';
cp->parameters[counter][2]=0;
}else{
if(cp->prefix.opr==0x66){//66h - operand-size prefix
cp->parameters[counter][0]='d';
cp->parameters[counter][1]='i';
cp->parameters[counter][2]=0;
break;
}else{
cp->parameters[counter][0]='e';
cp->parameters[counter][1]='d';
cp->parameters[counter][2]='i';
cp->parameters[counter][3]=0;
}
}
break;
}
break;
//------------------------------------reg2----------------------------------------------------------------------
case 'p'://reg2
fseek(hFileOpcodes,temp_int+MODRM_FIELD_OFFSET+3,SEEK_SET);//fp on reg/opcode section
fread(&buf,1,1,hFileOpcodes);
if(buf=='r'){//check if reg2
fseek(hFileOpcodes,temp_int+MODRM_FIELD_OFFSET+6,SEEK_SET);
fread(&buf,1,1,hFileOpcodes);
if(buf=='2'){//reg2
ext_len=cp->modrm.reg;
}else{//reg2 in rm section
ext_len=cp->modrm.rm;
}
}else{//reg2 in rm section
ext_len=cp->modrm.rm;
}
//in ext_len number of register
switch(ext_len){
case 0://al ax eax
if(cp->sf.w==0){
cp->parameters[counter][0]='a';
cp->parameters[counter][1]='l';
cp->parameters[counter][2]=0;
}else{
if(cp->prefix.opr==0x66){//66h - operand-size prefix
cp->parameters[counter][0]='a';
cp->parameters[counter][1]='x';
cp->parameters[counter][2]=0;
break;
}else{
cp->parameters[counter][0]='e';
cp->parameters[counter][1]='a';
cp->parameters[counter][2]='x';
cp->parameters[counter][3]=0;
}
}
break;
case 1://ecx
if(cp->sf.w==0){
cp->parameters[counter][0]='c';
cp->parameters[counter][1]='l';
cp->parameters[counter][2]=0;
}else{
if(cp->prefix.opr==0x66){//66h - operand-size prefix
cp->parameters[counter][0]='c';
cp->parameters[counter][1]='x';
cp->parameters[counter][2]=0;
break;
}else{
cp->parameters[counter][0]='e';
cp->parameters[counter][1]='c';
cp->parameters[counter][2]='x';
cp->parameters[counter][3]=0;
}
}
break;
case 2://edx
if(cp->sf.w==0){
cp->parameters[counter][0]='d';
cp->parameters[counter][1]='l';
cp->parameters[counter][2]=0;
}else{
if(cp->prefix.opr==0x66){//66h - operand-size prefix
cp->parameters[counter][0]='d';
cp->parameters[counter][1]='x';
cp->parameters[counter][2]=0;
break;
}else{
cp->parameters[counter][0]='e';
cp->parameters[counter][1]='d';
cp->parameters[counter][2]='x';
cp->parameters[counter][3]=0;
}
}
break;
case 3://ebx
if(cp->sf.w==0){
cp->parameters[counter][0]='b';
cp->parameters[counter][1]='l';
cp->parameters[counter][2]=0;
}else{
if(cp->prefix.opr==0x66){//66h - operand-size prefix
cp->parameters[counter][0]='b';
cp->parameters[counter][1]='x';
cp->parameters[counter][2]=0;
break;
}else{
cp->parameters[counter][0]='e';
cp->parameters[counter][1]='b';
cp->parameters[counter][2]='x';
cp->parameters[counter][3]=0;
}
}
break;
case 4://esp
if(cp->sf.w==0){
cp->parameters[counter][0]='s';
cp->parameters[counter][1]='d';
cp->parameters[counter][2]=0;
}else{
if(cp->prefix.opr==0x66){//66h - operand-size prefix
cp->parameters[counter][0]='s';
cp->parameters[counter][1]='p';
cp->parameters[counter][2]=0;
break;
}else{
cp->parameters[counter][0]='e';
cp->parameters[counter][1]='s';
cp->parameters[counter][2]='p';
cp->parameters[counter][3]=0;
}
}
break;
case 5://ebp
if(cp->sf.w==0){
cp->parameters[counter][0]='b';
cp->parameters[counter][1]='d';
cp->parameters[counter][2]=0;
}else{
if(cp->prefix.opr==0x66){//66h - operand-size prefix
cp->parameters[counter][0]='b';
cp->parameters[counter][1]='p';
cp->parameters[counter][2]=0;
break;
}else{
cp->parameters[counter][0]='e';
cp->parameters[counter][1]='b';
cp->parameters[counter][2]='p';
cp->parameters[counter][3]=0;
}
}
break;
case 6://esi
if(cp->sf.w==0){
cp->parameters[counter][0]='e';
cp->parameters[counter][1]='d';
cp->parameters[counter][2]=0;
}else{
if(cp->prefix.opr==0x66){//66h - operand-size prefix
cp->parameters[counter][0]='s';
cp->parameters[counter][1]='i';
cp->parameters[counter][2]=0;
break;
}else{
cp->parameters[counter][0]='e';
cp->parameters[counter][1]='s';
cp->parameters[counter][2]='i';
cp->parameters[counter][3]=0;
}
}
break;
case 7://edi
if(cp->sf.w==0){
cp->parameters[counter][0]='d';
cp->parameters[counter][1]='d';
cp->parameters[counter][2]=0;
}else{
if(cp->prefix.opr==0x66){//66h - operand-size prefix
cp->parameters[counter][0]='d';
cp->parameters[counter][1]='i';
cp->parameters[counter][2]=0;
break;
}else{
cp->parameters[counter][0]='e';
cp->parameters[counter][1]='d';
cp->parameters[counter][2]='i';
cp->parameters[counter][3]=0;
}
}
break;
}
break;
//-------------------------------------------------------------sreg----------------------------------------------
case 's'://sreg
if(cp->sf.ff!=-128){
ext_len=cp->sf.ff;
}else{
if(cp->sf.uuu!=-128){
ext_len=cp->sf.uuu;
}else{
fseek(hFileOpcodes,temp_int+MODRM_FIELD_OFFSET+3,SEEK_SET);//fp on mod/opcode section
fread(&buf,1,1,hFileOpcodes);
if(buf=='s'){
ext_len=cp->modrm.reg;
//printf("\t\tDEBUG\n");
}else{//sreg in rm section
ext_len=cp->modrm.rm;
//printf("\t\tDEBUG\n");
}
}
}
//in ext_len number of register
switch(ext_len){
case 0://es
cp->parameters[counter][0]='e';
cp->parameters[counter][1]='s';
cp->parameters[counter][2]=0;
break;
case 1://cs
cp->parameters[counter][0]='c';
cp->parameters[counter][1]='s';
cp->parameters[counter][2]=0;
break;
case 2://ss
cp->parameters[counter][0]='s';
cp->parameters[counter][1]='s';
cp->parameters[counter][2]=0;
break;
case 3://ds
cp->parameters[counter][0]='d';
cp->parameters[counter][1]='s';
cp->parameters[counter][2]=0;
break;
case 4://fs
cp->parameters[counter][0]='f';
cp->parameters[counter][1]='s';
cp->parameters[counter][2]=0;
break;
case 5://gs
cp->parameters[counter][0]='g';
cp->parameters[counter][1]='s';
cp->parameters[counter][2]=0;
break;
case 6://reserved1
fclose(hFileOpcodes);
free(mp);
return RET_ERROR;//error
break;
case 7://reserved2
return RET_ERROR;//error
fclose(hFileOpcodes);
free(mp);
break;
}
break;
//---------------------------------------------------- 1 ------------------------------------------------------
case '1':
cp->parameters[counter][0]='1';
cp->parameters[counter][1]=0;
break;
//-------------------------------------------------al ax eax---------------------------------------------------
case 'a':
if(cp->sf.w==0){//al
cp->parameters[counter][0]='a';
cp->parameters[counter][1]='l';
cp->parameters[counter][2]=0;
}else{
if(cp->prefix.opr==0x66){//ax
cp->parameters[counter][0]='a';
cp->parameters[counter][1]='x';
cp->parameters[counter][2]=0;
}else{//eax
cp->parameters[counter][0]='e';
cp->parameters[counter][1]='a';
cp->parameters[counter][2]='x';
cp->parameters[counter][3]=0;
}
}
break;
//------------------------------------------------- cl ---------------------------------------------------
case 'b'://cl
cp->parameters[counter][0]='c';
cp->parameters[counter][1]='l';
cp->parameters[counter][2]=0;
break;
//------------------------------------------------- dr0-7 ---------------------------------------------------
case 'd'://dr0-7
if(cp->sf.eee!=-128){
ext_len=cp->sf.eee;
}else{
fseek(hFileOpcodes,MODRM_FIELD_OFFSET+3,SEEK_SET);
fread(&buf,1,1,hFileOpcodes);
if(buf=='e'){//eee
ext_len=cp->modrm.reg;
}else{//in rm field
ext_len=cp->modrm.rm;
}
}
switch(ext_len){
case 0://dr0
cp->parameters[counter][0]='d';
cp->parameters[counter][1]='r';
cp->parameters[counter][2]='0';
cp->parameters[counter][3]=0;
break;
case 1://dr1
cp->parameters[counter][0]='d';
cp->parameters[counter][1]='r';
cp->parameters[counter][2]='1';
cp->parameters[counter][3]=0;
break;
case 2://dr2
cp->parameters[counter][0]='d';
cp->parameters[counter][1]='r';
cp->parameters[counter][2]='2';
cp->parameters[counter][3]=0;
break;
case 3://dr3
cp->parameters[counter][0]='d';
cp->parameters[counter][1]='r';
cp->parameters[counter][2]='3';
cp->parameters[counter][3]=0;
break;
case 4://dr4
cp->parameters[counter][0]='d';
cp->parameters[counter][1]='r';
cp->parameters[counter][2]='4';
cp->parameters[counter][3]=0;
break;