From 0491cbd3e0e95f7932a0c9b743d754da0294ad6e Mon Sep 17 00:00:00 2001
From: tuz358 <orca00358@gmail.com>
Date: Tue, 6 Mar 2018 15:09:35 +0900
Subject: [PATCH] Add push_imm32(0x68) instruction

---
 include/instructions.h | 1 +
 instructions.cpp       | 9 +++++++++
 2 files changed, 10 insertions(+)

diff --git a/include/instructions.h b/include/instructions.h
index a2e39fb..2342404 100644
--- a/include/instructions.h
+++ b/include/instructions.h
@@ -76,6 +76,7 @@ public:
   void pop_ebp();       // 0x5d
   void pop_esi();       // 0x5e
   void pop_edi();       // 0x5f
+  void push_imm32();    // 0x68
   void jne_imm8();      // 0x75
   void opcode_83();     // 0x83
   void mov_rm32_r32();  // 0x89
diff --git a/instructions.cpp b/instructions.cpp
index d771fc7..7c8636f 100644
--- a/instructions.cpp
+++ b/instructions.cpp
@@ -70,6 +70,7 @@ void Instructions::init_instructions(){
   this->instructions[0x5d] = &Instructions::pop_ebp;
   this->instructions[0x5e] = &Instructions::pop_esi;
   this->instructions[0x5f] = &Instructions::pop_edi;
+  this->instructions[0x68] = &Instructions::push_imm32;
   this->instructions[0x75] = &Instructions::jne_imm8;
   this->instructions[0x83] = &Instructions::opcode_83;
   this->instructions[0x89] = &Instructions::mov_rm32_r32;
@@ -888,6 +889,14 @@ void Instructions::pop_edi(){
   this->registers[4] += 4;
 }
 
+void Instructions::push_imm32(){
+  //printf("push_imm32 called.\n");
+  uint32_t imm32 = memory.read_uint32(this->eip);
+  imm32 = swap_endian32(imm32);
+  this->registers[4] -= 4; // esp -= 4
+  memory.write_uint32(this->registers[4], imm32);
+}
+
 void Instructions::jne_imm8(){
   //printf("jne_imm8 called.\n");