📄 zdisasm.c
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/******************************************************************************
ZDisasm.c : Z0MBiE DISASM ENGINE
Z0MBiE's HomePage
/\\|///
| ~_ |
(- 0o -)
_oOOo_ |/ (_) \| _oOOo_
|| \ ==- / ||
\\ /~~~~\ //
http://z0mbie.cjb.net
z0mbie@i.am (PGP)
******************************************************************************/
#include <windows.h>
#include "ZDisasm.h"
void GetInstLenght(DWORD* myiptr0, DWORD* osizeptr)
{
BYTE* iptr0 = (BYTE*)myiptr0;
DWORD table_1[256] =
{
/* 00 */ C_MODRM
/* 01 */, C_MODRM
/* 02 */, C_MODRM
/* 03 */, C_MODRM
/* 04 */, C_DATAW0
/* 05 */, C_DATAW0
/* 06 */, 0
/* 07 */, 0
/* 08 */, C_MODRM
/* 09 */, C_MODRM
/* 0A */, C_MODRM
/* 0B */, C_MODRM
/* 0C */, C_DATAW0
/* 0D */, C_DATAW0
/* 0E */, 0
/* 0F */, C_TABLE_0F
/* 10 */, C_MODRM
/* 11 */, C_MODRM
/* 12 */, C_MODRM
/* 13 */, C_MODRM
/* 14 */, C_DATAW0
/* 15 */, C_DATAW0
/* 16 */, 0
/* 17 */, 0
/* 18 */, C_MODRM
/* 19 */, C_MODRM
/* 1A */, C_MODRM
/* 1B */, C_MODRM
/* 1C */, C_DATAW0
/* 1D */, C_DATAW0
/* 1E */, 0
/* 1F */, 0
/* 20 */, C_MODRM
/* 21 */, C_MODRM
/* 22 */, C_MODRM
/* 23 */, C_MODRM
/* 24 */, C_DATAW0
/* 25 */, C_DATAW0
/* 26 */, C_PREFIX
/* 27 */, 0
/* 28 */, C_MODRM
/* 29 */, C_MODRM
/* 2A */, C_MODRM
/* 2B */, C_MODRM
/* 2C */, C_DATAW0
/* 2D */, C_DATAW0
/* 2E */, C_PREFIX
/* 2F */, 0
/* 30 */, C_MODRM
/* 31 */, C_MODRM
/* 32 */, C_MODRM
/* 33 */, C_MODRM
/* 34 */, C_DATAW0
/* 35 */, C_DATAW0
/* 36 */, C_PREFIX
/* 37 */, 0
/* 38 */, C_MODRM
/* 39 */, C_MODRM
/* 3A */, C_MODRM
/* 3B */, C_MODRM
/* 3C */, C_DATAW0
/* 3D */, C_DATAW0
/* 3E */, C_PREFIX
/* 3F */, 0
/* 40 */, 0
/* 41 */, 0
/* 42 */, 0
/* 43 */, 0
/* 44 */, 0
/* 45 */, 0
/* 46 */, 0
/* 47 */, 0
/* 48 */, 0
/* 49 */, 0
/* 4A */, 0
/* 4B */, 0
/* 4C */, 0
/* 4D */, 0
/* 4E */, 0
/* 4F */, 0
/* 50 */, 0
/* 51 */, 0
/* 52 */, 0
/* 53 */, 0
/* 54 */, 0
/* 55 */, 0
/* 56 */, 0
/* 57 */, 0
/* 58 */, 0
/* 59 */, 0
/* 5A */, 0
/* 5B */, 0
/* 5C */, 0
/* 5D */, 0
/* 5E */, 0
/* 5F */, 0
/* 60 */, 0
/* 61 */, 0
/* 62 */, C_MODRM
/* 63 */, C_MODRM
/* 64 */, C_PREFIX
/* 65 */, C_PREFIX
/* 66 */, C_PREFIX+C_66
/* 67 */, C_PREFIX+C_67
/* 68 */, C_DATA66
/* 69 */, C_MODRM+C_DATA66
/* 6A */, C_DATA1
/* 6B */, C_MODRM+C_DATA1
/* 6C */, 0
/* 6D */, 0
/* 6E */, 0
/* 6F */, 0
/* 70 */, C_DATA1
/* 71 */, C_DATA1
/* 72 */, C_DATA1
/* 73 */, C_DATA1
/* 74 */, C_DATA1
/* 75 */, C_DATA1
/* 76 */, C_DATA1
/* 77 */, C_DATA1
/* 78 */, C_DATA1
/* 79 */, C_DATA1
/* 7A */, C_DATA1
/* 7B */, C_DATA1
/* 7C */, C_DATA1
/* 7D */, C_DATA1
/* 7E */, C_DATA1
/* 7F */, C_DATA1
/* 80 */, C_MODRM+C_DATA1
/* 81 */, C_MODRM+C_DATA66
/* 82 */, C_MODRM+C_DATA1
/* 83 */, C_MODRM+C_DATA1
/* 84 */, C_MODRM
/* 85 */, C_MODRM
/* 86 */, C_MODRM
/* 87 */, C_MODRM
/* 88 */, C_MODRM
/* 89 */, C_MODRM
/* 8A */, C_MODRM
/* 8B */, C_MODRM
/* 8C */, C_MODRM
/* 8D */, C_MODRM
/* 8E */, C_MODRM
/* 8F */, C_MODRM
/* 90 */, 0
/* 91 */, 0
/* 92 */, 0
/* 93 */, 0
/* 94 */, 0
/* 95 */, 0
/* 96 */, 0
/* 97 */, 0
/* 98 */, 0
/* 99 */, 0
/* 9A */, C_DATA66+C_MEM2
/* 9B */, 0
/* 9C */, 0
/* 9D */, 0
/* 9E */, 0
/* 9F */, 0
/* A0 */, C_MEM67
/* A1 */, C_MEM67
/* A2 */, C_MEM67
/* A3 */, C_MEM67
/* A4 */, 0
/* A5 */, 0
/* A6 */, 0
/* A7 */, 0
/* A8 */, C_DATA1
/* A9 */, C_DATA66
/* AA */, 0
/* AB */, 0
/* AC */, 0
/* AD */, 0
/* AE */, 0
/* AF */, 0
/* B0 */, C_DATA1
/* B1 */, C_DATA1
/* B2 */, C_DATA1
/* B3 */, C_DATA1
/* B4 */, C_DATA1
/* B5 */, C_DATA1
/* B6 */, C_DATA1
/* B7 */, C_DATA1
/* B8 */, C_DATA66
/* B9 */, C_DATA66
/* BA */, C_DATA66
/* BB */, C_DATA66
/* BC */, C_DATA66
/* BD */, C_DATA66
/* BE */, C_DATA66
/* BF */, C_DATA66
/* C0 */, C_MODRM+C_DATA1
/* C1 */, C_MODRM+C_DATA1
/* C2 */, C_DATA2
/* C3 */, 0
/* C4 */, C_MODRM
/* C5 */, C_MODRM
/* C6 */, C_MODRM+C_DATA66
/* C7 */, C_MODRM+C_DATA66
/* C8 */, C_DATA2+C_DATA1
/* C9 */, 0
/* CA */, C_DATA2
/* CB */, 0
/* CC */, 0
/* CD */, C_DATA1+C_DATA4
/* CE */, 0
/* CF */, 0
/* D0 */, C_MODRM
/* D1 */, C_MODRM
/* D2 */, C_MODRM
/* D3 */, C_MODRM
/* D4 */, 0
/* D5 */, 0
/* D6 */, 0
/* D7 */, 0
/* D8 */, C_MODRM
/* D9 */, C_MODRM
/* DA */, C_MODRM
/* DB */, C_MODRM
/* DC */, C_MODRM
/* DD */, C_MODRM
/* DE */, C_MODRM
/* DF */, C_MODRM
/* E0 */, C_DATA1
/* E1 */, C_DATA1
/* E2 */, C_DATA1
/* E3 */, C_DATA1
/* E4 */, C_DATA1
/* E5 */, C_DATA1
/* E6 */, C_DATA1
/* E7 */, C_DATA1
/* E8 */, C_DATA66
/* E9 */, C_DATA66
/* EA */, C_DATA66+C_MEM2
/* EB */, C_DATA1
/* EC */, 0
/* ED */, 0
/* EE */, 0
/* EF */, 0
/* F0 */, C_PREFIX
/* F1 */, 0 // 0xF1
/* F2 */, C_PREFIX
/* F3 */, C_PREFIX
/* F4 */, 0
/* F5 */, 0
/* F6 */, C_FUCKINGTEST
/* F7 */, C_FUCKINGTEST
/* F8 */, 0
/* F9 */, 0
/* FA */, 0
/* FB */, 0
/* FC */, 0
/* FD */, 0
/* FE */, C_MODRM
/* FF */, C_MODRM
}; // table_1
DWORD table_0F[256] =
{
/* 00 */ C_MODRM
/* 01 */, C_MODRM
/* 02 */, C_MODRM
/* 03 */, C_MODRM
/* 04 */, -1
/* 05 */, -1
/* 06 */, 0
/* 07 */, -1
/* 08 */, 0
/* 09 */, 0
/* 0A */, 0
/* 0B */, 0
/* 0C */, -1
/* 0D */, -1
/* 0E */, -1
/* 0F */, -1
/* 10 */, -1
/* 11 */, -1
/* 12 */, -1
/* 13 */, -1
/* 14 */, -1
/* 15 */, -1
/* 16 */, -1
/* 17 */, -1
/* 18 */, -1
/* 19 */, -1
/* 1A */, -1
/* 1B */, -1
/* 1C */, -1
/* 1D */, -1
/* 1E */, -1
/* 1F */, -1
/* 20 */, -1
/* 21 */, -1
/* 22 */, -1
/* 23 */, -1
/* 24 */, -1
/* 25 */, -1
/* 26 */, -1
/* 27 */, -1
/* 28 */, -1
/* 29 */, -1
/* 2A */, -1
/* 2B */, -1
/* 2C */, -1
/* 2D */, -1
/* 2E */, -1
/* 2F */, -1
/* 30 */, -1
/* 31 */, -1
/* 32 */, -1
/* 33 */, -1
/* 34 */, -1
/* 35 */, -1
/* 36 */, -1
/* 37 */, -1
/* 38 */, -1
/* 39 */, -1
/* 3A */, -1
/* 3B */, -1
/* 3C */, -1
/* 3D */, -1
/* 3E */, -1
/* 3F */, -1
/* 40 */, -1
/* 41 */, -1
/* 42 */, -1
/* 43 */, -1
/* 44 */, -1
/* 45 */, -1
/* 46 */, -1
/* 47 */, -1
/* 48 */, -1
/* 49 */, -1
/* 4A */, -1
/* 4B */, -1
/* 4C */, -1
/* 4D */, -1
/* 4E */, -1
/* 4F */, -1
/* 50 */, -1
/* 51 */, -1
/* 52 */, -1
/* 53 */, -1
/* 54 */, -1
/* 55 */, -1
/* 56 */, -1
/* 57 */, -1
/* 58 */, -1
/* 59 */, -1
/* 5A */, -1
/* 5B */, -1
/* 5C */, -1
/* 5D */, -1
/* 5E */, -1
/* 5F */, -1
/* 60 */, -1
/* 61 */, -1
/* 62 */, -1
/* 63 */, -1
/* 64 */, -1
/* 65 */, -1
/* 66 */, -1
/* 67 */, -1
/* 68 */, -1
/* 69 */, -1
/* 6A */, -1
/* 6B */, -1
/* 6C */, -1
/* 6D */, -1
/* 6E */, -1
/* 6F */, -1
/* 70 */, -1
/* 71 */, -1
/* 72 */, -1
/* 73 */, -1
/* 74 */, -1
/* 75 */, -1
/* 76 */, -1
/* 77 */, -1
/* 78 */, -1
/* 79 */, -1
/* 7A */, -1
/* 7B */, -1
/* 7C */, -1
/* 7D */, -1
/* 7E */, -1
/* 7F */, -1
/* 80 */, C_DATA66
/* 81 */, C_DATA66
/* 82 */, C_DATA66
/* 83 */, C_DATA66
/* 84 */, C_DATA66
/* 85 */, C_DATA66
/* 86 */, C_DATA66
/* 87 */, C_DATA66
/* 88 */, C_DATA66
/* 89 */, C_DATA66
/* 8A */, C_DATA66
/* 8B */, C_DATA66
/* 8C */, C_DATA66
/* 8D */, C_DATA66
/* 8E */, C_DATA66
/* 8F */, C_DATA66
/* 90 */, C_MODRM
/* 91 */, C_MODRM
/* 92 */, C_MODRM
/* 93 */, C_MODRM
/* 94 */, C_MODRM
/* 95 */, C_MODRM
/* 96 */, C_MODRM
/* 97 */, C_MODRM
/* 98 */, C_MODRM
/* 99 */, C_MODRM
/* 9A */, C_MODRM
/* 9B */, C_MODRM
/* 9C */, C_MODRM
/* 9D */, C_MODRM
/* 9E */, C_MODRM
/* 9F */, C_MODRM
/* A0 */, 0
/* A1 */, 0
/* A2 */, 0
/* A3 */, C_MODRM
/* A4 */, C_MODRM+C_DATA1
/* A5 */, C_MODRM
/* A6 */, -1
/* A7 */, -1
/* A8 */, 0
/* A9 */, 0
/* AA */, 0
/* AB */, C_MODRM
/* AC */, C_MODRM+C_DATA1
/* AD */, C_MODRM
/* AE */, -1
/* AF */, C_MODRM
/* B0 */, C_MODRM
/* B1 */, C_MODRM
/* B2 */, C_MODRM
/* B3 */, C_MODRM
/* B4 */, C_MODRM
/* B5 */, C_MODRM
/* B6 */, C_MODRM
/* B7 */, C_MODRM
/* B8 */, -1
/* B9 */, -1
/* BA */, C_MODRM+C_DATA1
/* BB */, C_MODRM
/* BC */, C_MODRM
/* BD */, C_MODRM
/* BE */, C_MODRM
/* BF */, C_MODRM
/* C0 */, C_MODRM
/* C1 */, C_MODRM
/* C2 */, -1
/* C3 */, -1
/* C4 */, -1
/* C5 */, -1
/* C6 */, -1
/* C7 */, -1
/* C8 */, 0
/* C9 */, 0
/* CA */, 0
/* CB */, 0
/* CC */, 0
/* CD */, 0
/* CE */, 0
/* CF */, 0
/* D0 */, -1
/* D1 */, -1
/* D2 */, -1
/* D3 */, -1
/* D4 */, -1
/* D5 */, -1
/* D6 */, -1
/* D7 */, -1
/* D8 */, -1
/* D9 */, -1
/* DA */, -1
/* DB */, -1
/* DC */, -1
/* DD */, -1
/* DE */, -1
/* DF */, -1
/* E0 */, -1
/* E1 */, -1
/* E2 */, -1
/* E3 */, -1
/* E4 */, -1
/* E5 */, -1
/* E6 */, -1
/* E7 */, -1
/* E8 */, -1
/* E9 */, -1
/* EA */, -1
/* EB */, -1
/* EC */, -1
/* ED */, -1
/* EE */, -1
/* EF */, -1
/* F0 */, -1
/* F1 */, -1
/* F2 */, -1
/* F3 */, -1
/* F4 */, -1
/* F5 */, -1
/* F6 */, -1
/* F7 */, -1
/* F8 */, -1
/* F9 */, -1
/* FA */, -1
/* FB */, -1
/* FC */, -1
/* FD */, -1
/* FE */, -1
/* FF */, -1
}; // table_0F
BYTE* iptr = iptr0;
BYTE b, mod, rm;
DWORD f = 0;
prefix:
b = *iptr++;
f |= table_1[b];
if (f&C_FUCKINGTEST)
if (((*iptr)&0x38)==0x00) // ttt
f=C_MODRM+C_DATAW0; // TEST
else
f=C_MODRM; // NOT,NEG,MUL,IMUL,DIV,IDIV
if (f&C_TABLE_0F)
{
b = *iptr++;
f = table_0F[b];
}
if (f==C_ERROR)
{
*osizeptr=C_ERROR;
return;
}
if (f&C_PREFIX)
{
f&=~C_PREFIX;
goto prefix;
}
if (f&C_DATAW0) if (b&0x01) f|=C_DATA66; else f|=C_DATA1;
if (f&C_MODRM)
{
b = *iptr++;
mod = b & 0xC0;
rm = b & 0x07;
if (mod!=0xC0)
{
if (f&C_67) // modrm16
{
if ((mod==0x00)&&(rm==0x06)) f|=C_MEM2;
if (mod==0x40) f|=C_MEM1;
if (mod==0x80) f|=C_MEM2;
}
else // modrm32
{
if (mod==0x40) f|=C_MEM1;
if (mod==0x80) f|=C_MEM4;
if (rm==0x04) rm = (*iptr++) & 0x07; // rm<-sib.base
if ((rm==0x05)&&(mod==0x00)) f|=C_MEM4;
}
}
} // C_MODRM
if (f&C_MEM67) if (f&C_67) f|=C_MEM2; else f|=C_MEM4;
if (f&C_DATA66) if (f&C_66) f|=C_DATA2; else f|=C_DATA4;
if (f&C_MEM1) iptr++;
if (f&C_MEM2) iptr+=2;
if (f&C_MEM4) iptr+=4;
if (f&C_DATA1) iptr++;
if (f&C_DATA2) iptr+=2;
if (f&C_DATA4) iptr+=4;
*osizeptr = iptr - iptr0;
}
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