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Add xor_r32_rm32(0x33) instruction

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tuz358
2018-03-06 11:23:41 +09:00
parent 9c186fd247
commit 071f2794fa
2 changed files with 52 additions and 0 deletions
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1
include/instructions.h
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@@ -40,6 +40,7 @@ public:
void sub_r32_rm32(); // 0x2b
void sub_eax_imm32(); // 0x2d
void xor_rm32_r32(); // 0x31
void xor_r32_rm32(); // 0x33
void inc_eax(); // 0x40
void inc_ecx(); // 0x41
void inc_edx(); // 0x42

51
instructions.cpp
View File

@@ -33,6 +33,7 @@ void Instructions::init_instructions(){
this->instructions[0x2b] = &Instructions::sub_r32_rm32;
this->instructions[0x2d] = &Instructions::sub_eax_imm32;
this->instructions[0x31] = &Instructions::xor_rm32_r32;
this->instructions[0x33] = &Instructions::xor_r32_rm32;
this->instructions[0x40] = &Instructions::inc_eax;
this->instructions[0x41] = &Instructions::inc_ecx;
this->instructions[0x42] = &Instructions::inc_edx;
@@ -581,6 +582,56 @@ void Instructions::xor_rm32_r32(){
}
}
void Instructions::xor_r32_rm32(){
//printf("xor_r32_rm32 called.\n");
uint32_t addr, dst, imm32;
uint8_t imm8;
this->modrm = memory.read_uint8(this->eip);
this->calc_modrm();
switch (this->mod) {
case 0:
// xor R, [M]
// addr : M
this->eip++;
addr = this->registers[this->M];
// dst : data of [M]
dst = memory.read_uint32(addr);
this->registers[this->R] ^= dst;
break;
case 1:
// xor R, [M+imm8]
this->eip++;
imm8 = memory.read_uint8(this->eip);
// addr : M
addr = this->registers[this->M];
// dst : data of [M+imm8]
dst = memory.read_uint32(addr + imm8);
this->registers[this->R] ^= dst;
this->eip++;
break;
case 2:
// xor R, [M+imm32]
this->eip++;
imm32 = memory.read_uint32(this->eip);
imm32 = swap_endian32(imm32);
// addr : M
addr = this->registers[this->M];
// dst : data of [M+imm32]
dst = memory.read_uint32(addr + imm32);
this->registers[this->R] ^= dst;
this->eip += 4;
break;
default:
// case mod == 3
// xor R, M
this->eip++;
this->registers[this->R] ^= this->registers[this->M];
break;
}
}
void Instructions::inc_eax(){
//printf("inc_eax called.\n");
this->registers[0]++;