495 lines
14 KiB
C++
495 lines
14 KiB
C++
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//++
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//
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// Copyright (c) Microsoft Corporation
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//
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// Module Name:
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//
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// blpecoff.cpp
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//
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// Abstract:
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//
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// This module implements PE / COFF support for the boot loader.
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//
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//--
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#include "bl.h"
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#define IMAGE_DOS_SIGNATURE 0x05A4D // MZ
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#define IMAGE_NT_SIGNATURE 0x000004550 // PE00
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typedef struct _IMAGE_DOS_HEADER { // DOS .EXE header
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UINT16 e_magic; // Magic number
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UINT16 e_cblp; // Bytes on last page of file
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UINT16 e_cp; // Pages in file
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UINT16 e_crlc; // Relocations
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UINT16 e_cparhdr; // Size of header in paragraphs
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UINT16 e_minalloc; // Minimum extra paragraphs needed
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UINT16 e_maxalloc; // Maximum extra paragraphs needed
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UINT16 e_ss; // Initial (relative) SS value
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UINT16 e_sp; // Initial SP value
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UINT16 e_csum; // Checksum
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UINT16 e_ip; // Initial IP value
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UINT16 e_cs; // Initial (relative) CS value
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UINT16 e_lfarlc; // File address of relocation table
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UINT16 e_ovno; // Overlay number
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UINT16 e_res[4]; // Reserved words
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UINT16 e_oemid; // OEM identifier (for e_oeminfo)
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UINT16 e_oeminfo; // OEM information; e_oemid specific
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UINT16 e_res2[10]; // Reserved words
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INT32 e_lfanew; // File address of new exe header
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} IMAGE_DOS_HEADER, *PIMAGE_DOS_HEADER;
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typedef struct _IMAGE_FILE_HEADER {
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UINT16 Machine;
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UINT16 NumberOfSections;
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UINT32 TimeDateStamp;
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UINT32 PointerToSymbolTable;
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UINT32 NumberOfSymbols;
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UINT16 SizeOfOptionalHeader;
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UINT16 Characteristics;
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} IMAGE_FILE_HEADER, *PIMAGE_FILE_HEADER;
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typedef struct _IMAGE_DATA_DIRECTORY {
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UINT32 VirtualAddress;
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UINT32 Size;
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} IMAGE_DATA_DIRECTORY, *PIMAGE_DATA_DIRECTORY;
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#define IMAGE_NUMBEROF_DIRECTORY_ENTRIES 16
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#define IMAGE_DIRECTORY_ENTRY_BASERELOC 5
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#if defined(BOOT_X86)
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typedef struct _IMAGE_OPTIONAL_HEADER_32 {
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UINT16 Magic;
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UINT8 MajorLinkerVersion;
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UINT8 MinorLinkerVersion;
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UINT32 SizeOfCode;
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UINT32 SizeOfInitializedData;
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UINT32 SizeOfUninitializedData;
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UINT32 AddressOfEntryPoint;
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UINT32 BaseOfCode;
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UINT32 BaseOfData;
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UINT32 ImageBase;
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UINT32 SectionAlignment;
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UINT32 FileAlignment;
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UINT16 MajorOperatingSystemVersion;
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UINT16 MinorOperatingSystemVersion;
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UINT16 MajorImageVersion;
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UINT16 MinorImageVersion;
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UINT16 MajorSubsystemVersion;
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UINT16 MinorSubsystemVersion;
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UINT32 Win32VersionValue;
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UINT32 SizeOfImage;
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UINT32 SizeOfHeaders;
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UINT32 CheckSum;
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UINT16 Subsystem;
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UINT16 DllCharacteristics;
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UINT32 SizeOfStackReserve;
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UINT32 SizeOfStackCommit;
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UINT32 SizeOfHeapReserve;
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UINT32 SizeOfHeapCommit;
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UINT32 LoaderFlags;
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UINT32 NumberOfRvaAndSizes;
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IMAGE_DATA_DIRECTORY DataDirectory[IMAGE_NUMBEROF_DIRECTORY_ENTRIES];
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} IMAGE_OPTIONAL_HEADER32, *PIMAGE_OPTIONAL_HEADER32;
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typedef struct _IMAGE_NT_HEADERS32 {
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UINT32 Signature;
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IMAGE_FILE_HEADER FileHeader;
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IMAGE_OPTIONAL_HEADER32 OptionalHeader;
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} IMAGE_NT_HEADERS32, *PIMAGE_NT_HEADERS32;
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typedef IMAGE_NT_HEADERS32 IMAGE_NT_HEADERS, *PIMAGE_NT_HEADERS;
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#elif defined(BOOT_X64)
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typedef struct _IMAGE_OPTIONAL_HEADER64 {
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UINT16 Magic;
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UINT8 MajorLinkerVersion;
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UINT8 MinorLinkerVersion;
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UINT32 SizeOfCode;
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UINT32 SizeOfInitializedData;
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UINT32 SizeOfUninitializedData;
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UINT32 AddressOfEntryPoint;
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UINT32 BaseOfCode;
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UINT64 ImageBase;
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UINT32 SectionAlignment;
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UINT32 FileAlignment;
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UINT16 MajorOperatingSystemVersion;
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UINT16 MinorOperatingSystemVersion;
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UINT16 MajorImageVersion;
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UINT16 MinorImageVersion;
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UINT16 MajorSubsystemVersion;
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UINT16 MinorSubsystemVersion;
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UINT32 Win32VersionValue;
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UINT32 SizeOfImage;
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UINT32 SizeOfHeaders;
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UINT32 CheckSum;
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UINT16 Subsystem;
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UINT16 DllCharacteristics;
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UINT64 SizeOfStackReserve;
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UINT64 SizeOfStackCommit;
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UINT64 SizeOfHeapReserve;
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UINT64 SizeOfHeapCommit;
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UINT32 LoaderFlags;
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UINT32 NumberOfRvaAndSizes;
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IMAGE_DATA_DIRECTORY DataDirectory[IMAGE_NUMBEROF_DIRECTORY_ENTRIES];
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} IMAGE_OPTIONAL_HEADER64, *PIMAGE_OPTIONAL_HEADER64;
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typedef struct _IMAGE_NT_HEADERS64 {
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UINT32 Signature;
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IMAGE_FILE_HEADER FileHeader;
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IMAGE_OPTIONAL_HEADER64 OptionalHeader;
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} IMAGE_NT_HEADERS64, *PIMAGE_NT_HEADERS64;
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typedef IMAGE_NT_HEADERS64 IMAGE_NT_HEADERS, *PIMAGE_NT_HEADERS;
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#endif
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#define IMAGE_SIZEOF_SHORT_NAME 8
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typedef struct _IMAGE_SECTION_HEADER {
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UINT8 Name[IMAGE_SIZEOF_SHORT_NAME];
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union {
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UINT32 PhysicalAddress;
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UINT32 VirtualSize;
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} Misc;
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UINT32 VirtualAddress;
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UINT32 SizeOfRawData;
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UINT32 PointerToRawData;
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UINT32 PointerToRelocations;
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UINT32 PointerToLinenumbers;
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UINT16 NumberOfRelocations;
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UINT16 NumberOfLinenumbers;
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UINT32 Characteristics;
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} IMAGE_SECTION_HEADER, *PIMAGE_SECTION_HEADER;
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typedef struct _IMAGE_BASE_RELOCATION {
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UINT32 VirtualAddress;
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UINT32 SizeOfBlock;
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UINT16 TypeOffset[0];
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} IMAGE_BASE_RELOCATION, *PIMAGE_BASE_RELOCATION;
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#define IMAGE_REL_BASED_ABSOLUTE 0
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#define IMAGE_REL_BASED_HIGHLOW 3
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#define IMAGE_REL_BASED_DIR64 10
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VOID
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BlPeGetVirtualRange(
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PVOID Image,
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PVOID *VirtualBase,
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ULONG_PTR *VirtualSize
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)
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//++
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//
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// Routine Description:
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//
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// This function queries the virtual range for the specified image.
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//
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// Arguments:
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//
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// Image - Supplies a pointer to the image.
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//
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// VirtualBase - Receives the virtual base address of the image.
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//
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// VirtualSize - Receives the virtual size of the image.
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//
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//--
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{
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PIMAGE_DOS_HEADER DosHeader;
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UINT32 Index;
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PIMAGE_NT_HEADERS NtHeader;
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PIMAGE_SECTION_HEADER Section;
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UINT32 SectionEnd;
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DosHeader = (PIMAGE_DOS_HEADER) Image;
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if (DosHeader->e_magic != IMAGE_DOS_SIGNATURE) {
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BlRtlPrintf("PECOFF: Invalid image!\n");
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BlRtlHalt();
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}
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NtHeader = (PIMAGE_NT_HEADERS) ((ULONG_PTR) Image + DosHeader->e_lfanew);
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if (NtHeader->Signature != IMAGE_NT_SIGNATURE) {
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BlRtlPrintf("PECOFF: Invalid image!\n");
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BlRtlHalt();
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}
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if (NtHeader->FileHeader.NumberOfSections == 0) {
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BlRtlPrintf("PECOFF: Invalid image!\n");
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BlRtlHalt();
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}
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if ((NtHeader->OptionalHeader.ImageBase % PAGE_SIZE) != 0) {
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BlRtlPrintf("PECOFF: Invalid image!\n");
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BlRtlHalt();
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}
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*VirtualBase = (PVOID) NtHeader->OptionalHeader.ImageBase;
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*VirtualSize = 0;
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Section = (PIMAGE_SECTION_HEADER) (((ULONG_PTR) &NtHeader->OptionalHeader) + NtHeader->FileHeader.SizeOfOptionalHeader);
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for (Index = 0; Index < NtHeader->FileHeader.NumberOfSections; Index += 1) {
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SectionEnd = Section[Index].VirtualAddress + Section[Index].Misc.VirtualSize;
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if (SectionEnd > *VirtualSize) {
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*VirtualSize = SectionEnd;
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}
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}
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*VirtualSize = ROUND_UP_TO_PAGES(*VirtualSize);
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return;
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}
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VOID
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BlPeApplyFixupBlock(
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PIMAGE_BASE_RELOCATION Block,
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ULONG_PTR VirtualBase,
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ULONG_PTR RelocDiff
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)
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//++
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//
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// Routine Description:
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//
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// This function applies all of the base fixups in the specified block to the image.
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//
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// Arguments:
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//
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// Block - Supplies a pointer to the base relocation fixup block.
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//
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// VirtualBase - Supplies the target address of the image.
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//
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// RelocDiff - Supplies the offset of the image target address from the base address.
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//
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//--
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{
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PUINT16 Reloc;
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PUINT16 BlockEnd;
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ULONG_PTR BlockBase;
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ULONG_PTR Target;
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Reloc = Block->TypeOffset;
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BlockEnd = (PUINT16) ( ((PUINT8) Block) + Block->SizeOfBlock);
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BlockBase = VirtualBase + Block->VirtualAddress;
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#if PECOFF_VERBOSE
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BlRtlPrintf("PECOFF: Reloc Block %p:\n", Block->VirtualAddress);
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#endif
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for (; Reloc < BlockEnd; Reloc++) {
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Target = BlockBase + (*Reloc & 0xfff);
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#if PECOFF_VERBOSE
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switch (*Reloc >> 12) {
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case IMAGE_REL_BASED_ABSOLUTE: {
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BlRtlPrintf("PECOFF: %p: abs:%x \r", (PUINT32) Target, * (PUINT32) Target);
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break;
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}
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case IMAGE_REL_BASED_HIGHLOW: {
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BlRtlPrintf("PECOFF: %p: r32:%x->%x \r", (PUINT32) Target, * (PUINT32) Target, * (PUINT32) Target + (UINT32) RelocDiff);
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break;
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}
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case IMAGE_REL_BASED_DIR64: {
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BlRtlPrintf("PECOFF: %p: r64:%lx->%lx \r", (PUINT64) Target, * (PUINT64) Target, * (PUINT64) Target + (UINT64) RelocDiff);
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break;
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}
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default: {
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BlRtlPrintf("PECOFF: %p: %x ??? \r", (PUINT32) Target, Reloc[0] >> 12);
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break;
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}
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}
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#endif
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switch (*Reloc >> 12) {
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case IMAGE_REL_BASED_ABSOLUTE: {
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break;
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}
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case IMAGE_REL_BASED_HIGHLOW: {
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* (PUINT32) Target += (UINT32) RelocDiff;
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break;
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}
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case IMAGE_REL_BASED_DIR64: {
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* (PUINT64 *) Target += (UINT64) RelocDiff;
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break;
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}
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default: {
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BlRtlPrintf("PECOFF: Illegal relocation.\n");
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BlRtlHalt();
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}
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}
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}
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}
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VOID
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BlPeLoadImage(
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PVOID LoadBase,
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PVOID Image,
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PVOID *EntryPoint
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)
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//++
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//
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// Routine Description:
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//
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// This function loads the specified image.
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//
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// Arguments:
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//
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// Image - Supplies a pointer to the image to load.
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//
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// EntryPoint - Receives a pointer to the entry point of the image.
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//
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//--
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{
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ULONG_PTR BytesToCopy;
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PIMAGE_DOS_HEADER DosHeader;
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UINT32 Index;
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PIMAGE_NT_HEADERS NtHeader;
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PIMAGE_SECTION_HEADER Section;
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ULONG_PTR VirtualBase;
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ULONG_PTR RelocDiff;
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VirtualBase = (ULONG_PTR) LoadBase;
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DosHeader = (PIMAGE_DOS_HEADER) Image;
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if (DosHeader->e_magic != IMAGE_DOS_SIGNATURE) {
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BlRtlPrintf("PECOFF: Missing MZ!\n");
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BlRtlHalt();
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}
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NtHeader = (PIMAGE_NT_HEADERS) ((ULONG_PTR) Image + DosHeader->e_lfanew);
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||
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|
|
||
|
|
if (NtHeader->Signature != IMAGE_NT_SIGNATURE) {
|
||
|
|
|
||
|
|
BlRtlPrintf("PECOFF: Missing PE!\n");
|
||
|
|
BlRtlHalt();
|
||
|
|
}
|
||
|
|
|
||
|
|
if (NtHeader->FileHeader.NumberOfSections == 0) {
|
||
|
|
|
||
|
|
BlRtlPrintf("PECOFF: No sections!\n");
|
||
|
|
BlRtlHalt();
|
||
|
|
}
|
||
|
|
|
||
|
|
if ((NtHeader->OptionalHeader.ImageBase % PAGE_SIZE) != 0) {
|
||
|
|
|
||
|
|
BlRtlPrintf("PECOFF: Not page aligned.\n");
|
||
|
|
BlRtlHalt();
|
||
|
|
}
|
||
|
|
|
||
|
|
BlRtlCopyMemory((PVOID) VirtualBase,
|
||
|
|
Image,
|
||
|
|
NtHeader->OptionalHeader.SizeOfHeaders);
|
||
|
|
|
||
|
|
Section = (PIMAGE_SECTION_HEADER) (((ULONG_PTR) &NtHeader->OptionalHeader) + NtHeader->FileHeader.SizeOfOptionalHeader);
|
||
|
|
|
||
|
|
for (Index = 0; Index < NtHeader->FileHeader.NumberOfSections; Index += 1) {
|
||
|
|
|
||
|
|
BlRtlZeroMemory((PVOID) (VirtualBase + Section[Index].VirtualAddress), Section[Index].Misc.VirtualSize);
|
||
|
|
|
||
|
|
if (Section[Index].SizeOfRawData < Section[Index].Misc.VirtualSize) {
|
||
|
|
|
||
|
|
BytesToCopy = Section[Index].SizeOfRawData;
|
||
|
|
|
||
|
|
} else {
|
||
|
|
|
||
|
|
BytesToCopy = Section[Index].Misc.VirtualSize;
|
||
|
|
}
|
||
|
|
|
||
|
|
BlRtlCopyMemory((PVOID) (VirtualBase + Section[Index].VirtualAddress),
|
||
|
|
(PVOID) (((ULONG_PTR) Image) + Section[Index].PointerToRawData),
|
||
|
|
BytesToCopy);
|
||
|
|
|
||
|
|
#if PECOFF_VERBOSE
|
||
|
|
|
||
|
|
{
|
||
|
|
CHAR Temp[IMAGE_SIZEOF_SHORT_NAME + 1];
|
||
|
|
|
||
|
|
BlRtlCopyMemory(Temp,
|
||
|
|
Section[Index].Name,
|
||
|
|
IMAGE_SIZEOF_SHORT_NAME);
|
||
|
|
|
||
|
|
Temp[IMAGE_SIZEOF_SHORT_NAME] = 0;
|
||
|
|
|
||
|
|
BlRtlPrintf("PECOFF: %p ... %p (%p ... %p) %s\n",
|
||
|
|
VirtualBase + Section[Index].VirtualAddress,
|
||
|
|
VirtualBase + Section[Index].VirtualAddress + Section[Index].Misc.VirtualSize - 1,
|
||
|
|
(((ULONG_PTR) Image) + Section[Index].PointerToRawData),
|
||
|
|
(((ULONG_PTR) Image) + Section[Index].PointerToRawData) + BytesToCopy,
|
||
|
|
Temp);
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
RelocDiff = VirtualBase - (ULONG_PTR)NtHeader->OptionalHeader.ImageBase;
|
||
|
|
|
||
|
|
if (RelocDiff != 0) {
|
||
|
|
|
||
|
|
PUINT8 RelocList;
|
||
|
|
PUINT8 RelocListEnd;
|
||
|
|
PIMAGE_BASE_RELOCATION Block;
|
||
|
|
|
||
|
|
RelocList = (PUINT8) (VirtualBase + NtHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC].VirtualAddress);
|
||
|
|
RelocListEnd = RelocList + NtHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC].Size;
|
||
|
|
|
||
|
|
#if PECOFF_VERBOSE
|
||
|
|
|
||
|
|
BlRtlPrintf("PECOFF: Relocs: %p ... %p\n", RelocList, RelocListEnd);
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
while (RelocList < RelocListEnd) {
|
||
|
|
|
||
|
|
Block = (PIMAGE_BASE_RELOCATION) RelocList;
|
||
|
|
|
||
|
|
BlPeApplyFixupBlock(Block, VirtualBase, RelocDiff);
|
||
|
|
|
||
|
|
RelocList += Block->SizeOfBlock;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
*EntryPoint = (PVOID) (VirtualBase + NtHeader->OptionalHeader.AddressOfEntryPoint);
|
||
|
|
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|