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Can decode simple intel programs, but I need to change the stored 

representation, so I am saving a snapshot before I do this.
This commit is contained in:
kandrot%netscape.com 2000-12-30 22:12:54 +00:00
Родитель b47a312a45
Коммит 93df1be6d3
1 изменённых файлов: 64 добавлений и 13 удалений
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77
tools/post_compile/post_compile.cpp
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@ -217,7 +217,8 @@ int DIGIT_MAP[256] = {
*/
char reg_name[8][4] = { "eax", "ecx", "edx", "ebx", "esp", "ebp", "esi", "edi" };
char instr_name[8][8] = { "unknown", "push", "add", "sub", "cmp", "mov", "j", "lea" };
char instr_name[][8] = { "unknown", "push", "add", "sub", "cmp", "mov", "j", "lea",
"incr", "pop", "xor", "nop", "ret" };
enum eRegister {
@ -226,7 +227,8 @@ enum eRegister {
};
enum eInstruction {
kunknown, kpush, kadd, ksub, kcmp, kmov, kjmp, klea
kunknown, kpush, kadd, ksub, kcmp, kmov, kjmp, klea,
kincr, kpop, kxor, knop, kret,
};
@ -318,6 +320,16 @@ CInstruction *am_non_reg( eInstruction instr, eRegister reg )
}
CInstruction *am_non_non( eInstruction instr )
{
CInstruction *retInstr = new CInstruction;
retInstr->isize = 1;
retInstr->instr = instr;
retInstr->src = kNoReg;
retInstr->dest = kNoReg;
}
CInstruction *am_imm8( eInstruction instr, unsigned char *theCode )
{
CInstruction *retInstr = new CInstruction;
@ -381,20 +393,40 @@ CInstruction* get_next_instruction( unsigned char *theCode )
case 0x01:
retInstr = am_rm32_reg( kadd, reg );
break;
case 0x31:
retInstr = am_rm32_reg( kxor, reg );
break;
case 0x50:
case 0x51:
case 0x52:
case 0x53:
case 0x54:
case 0x55:
retInstr = am_non_reg( kpush, (eRegister)(0x55 & 0x07) );
case 0x56:
case 0x57:
retInstr = am_non_reg( kpush, (eRegister)(*theCode & 0x07) );
break;
case 0x58:
case 0x59:
case 0x5a:
case 0x5b:
case 0x5c:
case 0x5d:
case 0x5e:
case 0x5f:
retInstr = am_non_reg( kpop, (eRegister)(*theCode & 0x07) );
break;
case 0x83:
switch (DIGIT_MAP[*(theCode+1)])
switch (DIGIT_MAP[*reg])
{
case 5:
retInstr = am_rm32_imm8( ksub, theCode+1 );
retInstr = am_rm32_imm8( ksub, reg );
break;
case 7:
retInstr = am_rm32_imm8( kcmp, theCode+1 );
retInstr = am_rm32_imm8( kcmp, reg );
break;
default:
retInstr = am_rm32_imm8( kunknown, theCode+1 );
retInstr = am_rm32_imm8( kunknown, reg );
break;
}
break;
@ -403,29 +435,48 @@ CInstruction* get_next_instruction( unsigned char *theCode )
break;
case 0x88:
case 0x8a:
retInstr = am_rm32_imm8( kunknown, theCode +1 );
retInstr = am_rm32_imm8( kunknown, reg );
break;
case 0x8b:
retInstr = am_reg_rm32( kmov, reg );
break;
case 0x8c:
case 0x8e:
retInstr = am_rm32_imm8( kunknown, theCode +1 );
retInstr = am_rm32_imm8( kunknown, reg );
break;
case 0x8d:
retInstr = am_rm32_imm8( klea, reg );
// retInstr->isize++; // ek need to handle the 16/32 instead of 8/32 for lea
break;
case 0xc7:
retInstr = am_rm32_imm32( kmov, theCode +1);
case 0x90:
retInstr = am_non_non( knop );
break;
case 0xc3:
retInstr = am_non_non( kret );
break;
case 0xc7:
retInstr = am_rm32_imm32( kmov, reg );
break;
case 0x7e:
case 0xeb:
retInstr = am_imm8( kjmp, theCode +1);
retInstr = am_imm8( kjmp, reg );
break;
case 0xff:
switch (DIGIT_MAP[*reg])
{
case 0: // ek check this out, since I believe the book is wrong
retInstr = am_reg_rm32( kincr, reg );
break;
default:
retInstr = am_rm32_imm8( kunknown, reg );
break;
}
break;
default:
retInstr = am_rm32_imm8( kunknown, theCode +1);
retInstr = am_rm32_imm8( kunknown, reg);
break;
}