这是一个反汇编的例子，反汇编的代码是使用Bochs 中的反汇编的代码，由于Bochs 反汇编模块做的比较独立，所以可以直接把反汇编模块包含到程序，不过为了使用这个反汇编的代码，需要自己写一小段对PE 进行简单解析的代码，下面是这个代码：
#include "stdafx.h"
#include "windows.h"
#include "disasm.h"
DWORD RVA2FileOffset(PIMAGE_SECTION_HEADER ntHead, int nSection , DWORD RVA);
int main(int argc, char* argv[])
{
IMAGE_DOS_HEADER dos;
IMAGE_NT_HEADERS fileHeader ;
DWORD cbRead ;
//printf("Hello World!\n");
if(argc != 2)
{
printf("Uage : %s PE file Name , ex : %s a.exe \r\n",argv[0],argv[0]);
return 0;
}
disassembler obj;
HANDLE hFile = CreateFile(argv[1],GENERIC_READ , FILE_SHARE_READ , NULL,OPEN_EXISTING , FILE_ATTRIBUTE_NORMAL, NULL);
if(hFile == INVALID_HANDLE_VALUE)
{
printf("can not open file : %s",argv[1]);
return 0;
}
printf("Begin Reading File ... ...\r\n");
//read the file dos header
ReadFile(hFile,&dos,sizeof(IMAGE_DOS_HEADER), &cbRead, NULL );
SetFilePointer(hFile,dos.e_lfanew , NULL, FILE_BEGIN);
//read the file pe header
ReadFile(hFile,&fileHeader, sizeof(IMAGE_NT_HEADERS), &cbRead, NULL );
int nEntryAddress = fileHeader.OptionalHeader.AddressOfEntryPoint ;
int nSectionNumber = fileHeader.FileHeader.NumberOfSections ;
PIMAGE_SECTION_HEADER pSection = new IMAGE_SECTION_HEADER [nSectionNumber];
ReadFile(hFile,pSection, sizeof(IMAGE_SECTION_HEADER ) * nSectionNumber, &cbRead, NULL);
printf("The Address of Entry is : %.8x\r\n", nEntryAddress);
printf("The Section number is : %d\r\n", nSectionNumber);
int nEntryAddressOffFile = RVA2FileOffset(pSection, nSectionNumber, nEntryAddress);
SetFilePointer(hFile,nEntryAddressOffFile,NULL,FILE_BEGIN);
unsigned char szInBuf[1024];
char szoutBuf[4096];
ReadFile(hFile,szInBuf,1024,&cbRead,NULL);
unsigned char *pStart = (unsigned char *)&szInBuf[0] ;
int nTotalLen = 0;
for(int i = 0 ; nTotalLen < 1024 ; i ++)
{
int nLen = obj.disasm(TRUE,
fileHeader.OptionalHeader.ImageBase,
nEntryAddress,
pStart,
( char *)&szoutBuf[0]);
pStart += nLen ;
nTotalLen += nLen ;
printf(szoutBuf );
printf("\r\n");
}
CloseHandle(hFile);
return 0;
}
DWORD RVA2FileOffset(PIMAGE_SECTION_HEADER ntHead, int nSection , DWORD RVA)
{
PIMAGE_SECTION_HEADER pSection = (PIMAGE_SECTION_HEADER) ntHead ;
int nTotalSection = nSection;
for(int i = 0 ; i < nTotalSection ; i ++)
{
if ((pSection->VirtualAddress <= RVA) && (pSection->VirtualAddress + pSection->Misc.VirtualSize >= RVA))
{
break;
}
}
if(i >= nTotalSection ){
return 0;
}
return pSection->PointerToRawData + RVA - pSection->VirtualAddress ;
}
看了上面的代码，你就会知道disassembler 这个类不是我自己写的，这个类就是来自Bochs 中的反汇编模块
