From b2dc9aa54d90556d854ffadbb4973728fe4cb6d0 Mon Sep 17 00:00:00 2001
From: tuz358 <orca00358@gmail.com>
Date: Tue, 6 Mar 2018 15:15:45 +0900
Subject: [PATCH] Add push_imm8(0x6a) instruction

---
 include/instructions.h |  1 +
 instructions.cpp       | 10 ++++++++++
 2 files changed, 11 insertions(+)

diff --git a/include/instructions.h b/include/instructions.h
index 2342404..1493371 100644
--- a/include/instructions.h
+++ b/include/instructions.h
@@ -77,6 +77,7 @@ public:
   void pop_esi();       // 0x5e
   void pop_edi();       // 0x5f
   void push_imm32();    // 0x68
+  void push_imm8();     // 0x6a
   void jne_imm8();      // 0x75
   void opcode_83();     // 0x83
   void mov_rm32_r32();  // 0x89
diff --git a/instructions.cpp b/instructions.cpp
index 7c8636f..c5f8889 100644
--- a/instructions.cpp
+++ b/instructions.cpp
@@ -71,6 +71,7 @@ void Instructions::init_instructions(){
   this->instructions[0x5e] = &Instructions::pop_esi;
   this->instructions[0x5f] = &Instructions::pop_edi;
   this->instructions[0x68] = &Instructions::push_imm32;
+  this->instructions[0x6a] = &Instructions::push_imm8;
   this->instructions[0x75] = &Instructions::jne_imm8;
   this->instructions[0x83] = &Instructions::opcode_83;
   this->instructions[0x89] = &Instructions::mov_rm32_r32;
@@ -895,6 +896,15 @@ void Instructions::push_imm32(){
   imm32 = swap_endian32(imm32);
   this->registers[4] -= 4; // esp -= 4
   memory.write_uint32(this->registers[4], imm32);
+  this->eip += 4;
+}
+
+void Instructions::push_imm8(){
+  //printf("push_imm8 called.\n");
+  uint8_t imm8 = memory.read_uint8(this->eip);
+  this->registers[4] -= 4; // esp -= 4
+  memory.write_uint8(this->registers[4], imm8);
+  this->eip++;
 }
 
 void Instructions::jne_imm8(){