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Add call_imm32(0xe8) instruction

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tuz358
2018-03-06 15:36:48 +09:00
parent b2dc9aa54d
commit d9e09da12b
2 changed files with 15 additions and 0 deletions
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1
include/instructions.h
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@@ -91,6 +91,7 @@ public:
void mov_ebp_imm32(); // 0xbd void mov_ebp_imm32(); // 0xbd
void mov_esi_imm32(); // 0xbe void mov_esi_imm32(); // 0xbe
void mov_edi_imm32(); // 0xbf void mov_edi_imm32(); // 0xbf
void call_imm32(); // 0xe8
void jmp_imm8(); // 0xeb void jmp_imm8(); // 0xeb
void hlt(); // 0xf4 void hlt(); // 0xf4
void opcode_ff(); // 0xff void opcode_ff(); // 0xff

14
instructions.cpp
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@@ -87,6 +87,7 @@ void Instructions::init_instructions(){
this->instructions[0xbd] = &Instructions::mov_ebp_imm32; this->instructions[0xbd] = &Instructions::mov_ebp_imm32;
this->instructions[0xbe] = &Instructions::mov_esi_imm32; this->instructions[0xbe] = &Instructions::mov_esi_imm32;
this->instructions[0xbf] = &Instructions::mov_edi_imm32; this->instructions[0xbf] = &Instructions::mov_edi_imm32;
this->instructions[0xe8] = &Instructions::call_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;
@@ -1062,6 +1063,19 @@ void Instructions::mov_edi_imm32(){
this->eip += 4; this->eip += 4;
} }
void Instructions::call_imm32(){
//printf("call_imm32 called.\n");
int32_t imm32 = memory.read_int32(this->eip);
imm32 = (int32_t)swap_endian32((uint32_t)imm32);
// push eip
this->registers[4] -= 4; // esp -= 4
memory.write_uint32(this->registers[4], this->eip);
// jmp imm32
this->eip += imm32;
this->eip += 4;
}
void Instructions::jmp_imm8() { void Instructions::jmp_imm8() {
//printf("jmp_imm8 called.\n"); //printf("jmp_imm8 called.\n");