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Add jmp_imm32(0xe9) instruction

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tuz358
2018-03-07 18:49:28 +09:00
parent a821412197
commit 0b22a08b91
2 changed files with 12 additions and 1 deletions
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1
include/instructions.h
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@@ -94,6 +94,7 @@ public:
void ret(); // 0xc3 void ret(); // 0xc3
void leave(); // 0xc9 void leave(); // 0xc9
void call_imm32(); // 0xe8 void call_imm32(); // 0xe8
void jmp_imm32(); // 0xe9
void jmp_imm8(); // 0xeb void jmp_imm8(); // 0xeb
void hlt(); // 0xf4 void hlt(); // 0xf4
void opcode_ff(); // 0xff void opcode_ff(); // 0xff

12
instructions.cpp
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@@ -90,6 +90,7 @@ void Instructions::init_instructions(){
this->instructions[0xc3] = &Instructions::ret; this->instructions[0xc3] = &Instructions::ret;
this->instructions[0xc9] = &Instructions::leave; this->instructions[0xc9] = &Instructions::leave;
this->instructions[0xe8] = &Instructions::call_imm32; this->instructions[0xe8] = &Instructions::call_imm32;
this->instructions[0xe9] = &Instructions::jmp_imm32;
this->instructions[0xeb] = &Instructions::jmp_imm8; this->instructions[0xeb] = &Instructions::jmp_imm8;
this->instructions[0xf4] = &Instructions::hlt; this->instructions[0xf4] = &Instructions::hlt;
this->instructions[0xff] = &Instructions::opcode_ff; this->instructions[0xff] = &Instructions::opcode_ff;
@@ -1090,7 +1091,16 @@ void Instructions::call_imm32(){
memory.write_uint32(this->registers[4], this->eip); memory.write_uint32(this->registers[4], this->eip);
// jmp imm32 // jmp imm32
this->eip += imm32; this->eip += imm32;
this->eip += 4; this->eip++;
}
void Instructions::jmp_imm32(){
//printf("jmp_imm32 called.\n");
int32_t imm32 = memory.read_int32(this->eip);
imm32 = (int32_t)swap_endian32((uint32_t)imm32);
this->eip += imm32;
this->eip++;
} }
void Instructions::jmp_imm8() { void Instructions::jmp_imm8() {