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Add sbb_r32_rm32(0x1b) instruction

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tuz358
2018-03-13 11:02:10 +09:00
parent b846710a77
commit efa07ef088
2 changed files with 52 additions and 0 deletions
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1
include/instructions.h
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@@ -38,6 +38,7 @@ public:
void adc_r32_rm32(); // 0x13
void adc_eax_imm32(); // 0x15
void sbb_rm32_r32(); // 0x19
void sbb_r32_rm32(); // 0x1b
void and_rm32_r32(); // 0x21
void and_r32_rm32(); // 0x23
void and_eax_imm32(); // 0x25

51
instructions.cpp
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@@ -30,6 +30,7 @@ void Instructions::init_instructions(){
this->instructions[0x13] = &Instructions::adc_r32_rm32;
this->instructions[0x15] = &Instructions::adc_eax_imm32;
this->instructions[0x19] = &Instructions::sbb_rm32_r32;
this->instructions[0x1b] = &Instructions::sbb_r32_rm32;
this->instructions[0x21] = &Instructions::and_rm32_r32;
this->instructions[0x23] = &Instructions::and_r32_rm32;
this->instructions[0x25] = &Instructions::and_eax_imm32;
@@ -492,6 +493,56 @@ void Instructions::sbb_rm32_r32(){
}
}
void Instructions::sbb_r32_rm32(){
//printf("sbb_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:
// sbb 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 + get_flag(CF);
break;
case 1:
// sbb 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 + get_flag(CF);
this->eip++;
break;
case 2:
// sbb 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 + get_flag(CF);
this->eip += 4;
break;
default:
// case mod == 3
// sbb R, M
this->eip++;
this->registers[this->R] -= this->registers[this->M] + get_flag(CF);
break;
}
}
void Instructions::and_rm32_r32(){
//printf("and_rm32_r32 called.\n");
uint32_t addr, dst, imm32;