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Add jmp_imm8(0xeb) instruction

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tuz358
2018-03-04 22:31:35 +09:00
parent cdf2d00777
commit 5c3fdd32b6
2 changed files with 10 additions and 0 deletions
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1
include/instructions.h
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@@ -27,5 +27,6 @@ public:
void nop(); // 0x90 void nop(); // 0x90
void mov_ecx_imm32(); // 0xb9 void mov_ecx_imm32(); // 0xb9
void mov_ebx_imm32(); // 0xbb void mov_ebx_imm32(); // 0xbb
void jmp_imm8(); // 0xeb
void hlt(); // 0xf4 void hlt(); // 0xf4
}; };

9
instructions.cpp
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@@ -24,6 +24,7 @@ void Instructions::init_instructions(){
this->instructions[0x90] = &Instructions::nop; this->instructions[0x90] = &Instructions::nop;
this->instructions[0xb9] = &Instructions::mov_ecx_imm32; this->instructions[0xb9] = &Instructions::mov_ecx_imm32;
this->instructions[0xbb] = &Instructions::mov_ebx_imm32; this->instructions[0xbb] = &Instructions::mov_ebx_imm32;
this->instructions[0xeb] = &Instructions::jmp_imm8;
this->instructions[0xf4] = &Instructions::hlt; this->instructions[0xf4] = &Instructions::hlt;
} }
@@ -115,6 +116,14 @@ void Instructions::mov_ebx_imm32(){
this->eip += 3; this->eip += 3;
} }
void jmp_imm8() {
printf("jmp_imm8 called.\n");
this->eip++;
uint8_t imm8 = memory.read_uint8(this->eip);
this->eip += imm8;
}
void Instructions::hlt(){ void Instructions::hlt(){
printf("hlt called.\n"); printf("hlt called.\n");
this->eip = 0x00; this->eip = 0x00;