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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
//
// CEELOAD reads in the PE file format using LoadLibrary
// ===========================================================================
#include "ildasmpch.h"
#include "ceeload.h"
#include <corhdr.h>
#include <corimage.h>
#include "util.hpp"
#include "pedecoder.h"
/*************************************************************************************/
// Constructor and destructor!
/*************************************************************************************/
PELoader::PELoader()
{
m_hFile = NULL;
m_hMod = NULL;
m_hMapFile = NULL;
m_pNT64 = NULL;
m_bIsPE32 = FALSE;
m_FileSize = m_FileSizeAligned = 0;
}
PELoader::~PELoader()
{
m_hMod = NULL;
m_pNT64 = NULL;
// If we have an hFile then we opened this file ourselves!
// If we do not then this file was loaded by the OS and the OS will
// close it for us.
if (m_hFile)
this->close();
}
/*************************************************************************************/
/*************************************************************************************/
void PELoader::close()
{
// _ASSERTE(m_hFile != NULL);
if (m_hFile)
{
if (m_hMod)
UnmapViewOfFile((void*)m_hMod);
if (m_hMapFile)
CloseHandle(m_hMapFile);
CloseHandle(m_hFile);
m_hMod = NULL;
m_hMapFile = NULL;
m_hFile = NULL;
m_FileSize = m_FileSizeAligned = 0;
}
}
BOOL PELoader::open(LPCSTR moduleName)
{
HMODULE newhMod = NULL;
DWORD dwFileSizeLow;
_ASSERTE(moduleName);
if (!moduleName)
return FALSE;
m_hFile = CreateFileA(moduleName, GENERIC_READ, FILE_SHARE_READ,
0, OPEN_EXISTING, 0, 0);
if (m_hFile == INVALID_HANDLE_VALUE)
return FALSE;
dwFileSizeLow = GetFileSize( m_hFile, NULL);
if (dwFileSizeLow == INVALID_FILE_SIZE)
return FALSE;
m_FileSize = dwFileSizeLow;
m_hMapFile = WszCreateFileMapping(m_hFile, NULL, PAGE_READONLY, 0, 0, NULL);
if (m_hMapFile == NULL)
return FALSE;
newhMod = (HMODULE) MapViewOfFile(m_hMapFile, FILE_MAP_READ, 0, 0, 0);
if (newhMod == NULL)
return FALSE;
return open(newhMod);
}
BOOL PELoader::open(const WCHAR* moduleName)
{
HMODULE newhMod = NULL;
DWORD dwFileSizeLow;
_ASSERTE(moduleName);
if (!moduleName)
return FALSE;
m_hFile = WszCreateFile(moduleName, GENERIC_READ, FILE_SHARE_READ,
0, OPEN_EXISTING, 0, 0);
if (m_hFile == INVALID_HANDLE_VALUE)
return FALSE;
dwFileSizeLow = GetFileSize( m_hFile, NULL);
if (dwFileSizeLow == INVALID_FILE_SIZE)
return FALSE;
m_FileSize = dwFileSizeLow;
m_hMapFile = WszCreateFileMapping(m_hFile, NULL, PAGE_READONLY, 0, 0, NULL);
if (m_hMapFile == NULL)
return FALSE;
newhMod = (HMODULE) MapViewOfFile(m_hMapFile, FILE_MAP_READ, 0, 0, 0);
if (newhMod == NULL)
return FALSE;
return open(newhMod);
}
/*************************************************************************************/
BOOL PELoader::open(HMODULE hMod)
{
IMAGE_DOS_HEADER * pdosHeader;
// get the dos header...
m_hMod = hMod;
pdosHeader = (IMAGE_DOS_HEADER*) hMod;
// If this is not a PE32+ image
if (pdosHeader->e_magic == VAL16(IMAGE_DOS_SIGNATURE) &&
0 < VAL32(pdosHeader->e_lfanew) && VAL32(pdosHeader->e_lfanew) < 0xFF0) // has to start on first page
{
size_t fileAlignment;
m_pNT32 = (IMAGE_NT_HEADERS32*) ((BYTE *)m_hMod + VAL32(pdosHeader->e_lfanew));
m_bIsPE32 = (m_pNT32->OptionalHeader.Magic == VAL16(IMAGE_NT_OPTIONAL_HDR32_MAGIC));
if (m_bIsPE32)
{
if ((m_pNT32->Signature != VAL32(IMAGE_NT_SIGNATURE)) ||
(m_pNT32->FileHeader.SizeOfOptionalHeader != VAL16(sizeof(IMAGE_OPTIONAL_HEADER32))))
{
// Make this appear uninitalized because for some reason this file is toasted.
m_pNT32 = NULL;
m_hMod = NULL;
return FALSE;
}
fileAlignment = VAL32(m_pNT32->OptionalHeader.FileAlignment)-1;
}
else //For now assume not i386 is IA64
{
if ((m_pNT64->Signature != VAL32(IMAGE_NT_SIGNATURE)) ||
(m_pNT64->FileHeader.SizeOfOptionalHeader != VAL16(sizeof(IMAGE_OPTIONAL_HEADER64))))
{
// Make this appear uninitalized because for some reason this file is toasted.
m_pNT64 = NULL;
m_hMod = NULL;
return FALSE;
}
fileAlignment = VAL32(m_pNT64->OptionalHeader.FileAlignment)-1;
}
m_FileSizeAligned = (m_FileSize + fileAlignment)&(~fileAlignment);
}
else
{
// Make this appear uninitalized because for some reason this file is toasted.
m_hMod = NULL;
return FALSE;
}
return TRUE;
}
/*************************************************************************************/
void PELoader::dump()
{
}
/*************************************************************************************/
BOOL PELoader::getCOMHeader(IMAGE_COR20_HEADER **ppCorHeader)
{
PIMAGE_SECTION_HEADER pSectionHeader;
if (m_bIsPE32)
{
PIMAGE_NT_HEADERS32 pImageHeader;
// Get the image header from the image, then get the directory location
// of the COM+ header which may or may not be filled out.
pImageHeader = (PIMAGE_NT_HEADERS32)Cor_RtlImageNtHeader(m_hMod, (ULONG) m_FileSize);
PREFIX_ASSUME(pImageHeader != NULL);
pSectionHeader = (PIMAGE_SECTION_HEADER) Cor_RtlImageRvaToVa32(pImageHeader, (PBYTE)m_hMod,
VAL32(pImageHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_COMHEADER].VirtualAddress),
(DWORD)m_FileSizeAligned /* FileLength */);
}
else
{
PIMAGE_NT_HEADERS64 pImageHeader;
// Get the image header from the image, then get the directory location
// of the COM+ header which may or may not be filled out.
pImageHeader = (PIMAGE_NT_HEADERS64)Cor_RtlImageNtHeader(m_hMod, (ULONG) m_FileSize);
PREFIX_ASSUME(pImageHeader != NULL);
pSectionHeader = (PIMAGE_SECTION_HEADER) Cor_RtlImageRvaToVa64(pImageHeader, (PBYTE)m_hMod,
VAL32(pImageHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_COMHEADER].VirtualAddress),
(DWORD)m_FileSizeAligned /* FileLength */);
}
// If the section header exists, then return ok and the address.
if (pSectionHeader)
{
*ppCorHeader = (IMAGE_COR20_HEADER *) pSectionHeader;
return TRUE;
}
// If there is no COM+ Data in this image, return false.
else
return FALSE;
}
/*************************************************************************************/
BOOL PELoader::getVAforRVA(DWORD rva,void **ppva)
{
PIMAGE_SECTION_HEADER pSectionHeader;
if (m_bIsPE32)
{
// Get the image header from the image, then get the directory location
// of the COM+ header which may or may not be filled out.
PIMAGE_NT_HEADERS32 pImageHeader;
pImageHeader = (PIMAGE_NT_HEADERS32) Cor_RtlImageNtHeader(m_hMod, (ULONG) m_FileSize);
PREFIX_ASSUME(pImageHeader != NULL);
pSectionHeader = (PIMAGE_SECTION_HEADER) Cor_RtlImageRvaToVa32(pImageHeader, (PBYTE)m_hMod,
rva, (DWORD)m_FileSizeAligned /* FileLength */);
}
else
{
PIMAGE_NT_HEADERS64 pImageHeader;
pImageHeader = (PIMAGE_NT_HEADERS64) Cor_RtlImageNtHeader(m_hMod, (ULONG) m_FileSize);
PREFIX_ASSUME(pImageHeader != NULL);
pSectionHeader = (PIMAGE_SECTION_HEADER) Cor_RtlImageRvaToVa64(pImageHeader, (PBYTE)m_hMod,
rva, (DWORD)m_FileSizeAligned /* FileLength */);
}
// If the section header exists, then return ok and the address.
if (pSectionHeader)
{
*ppva = pSectionHeader;
return TRUE;
}
// If there is no COM+ Data in this image, return false.
else
return FALSE;
}
void SectionInfo::Init(PELoader *pPELoader, IMAGE_DATA_DIRECTORY *dir)
{
_ASSERTE(dir);
m_dwSectionOffset = VAL32(dir->VirtualAddress);
if (m_dwSectionOffset != 0)
m_pSection = pPELoader->base() + m_dwSectionOffset;
else
m_pSection = 0;
m_dwSectionSize = VAL32(dir->Size);
}
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