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[SDK][HOST-TOOLS] Add load_config workaround for gcc builds
Since binutils can not add this, we re-introduce pefixup. It searches for the exported symbol '_load_config_used', and uses that to fill out the LOAD_CONFIG directory in the PE header
This commit is contained in:
Mark Jansen
parent
2ed06c9588
commit
0b948581fc
8 changed files with 176 additions and 385 deletions
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@ -1,421 +1,196 @@
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/*
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* PE Fixup Utility
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* Copyright (C) 2005 Filip Navara
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* Copyright (C) 2020 Mark Jansen
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*
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* The purpose of this utility is fix PE binaries generated by binutils and
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* to manipulate flags that can't be set by binutils.
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*
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* Currently two features are implemented:
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* Currently one features is implemented:
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*
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* - Setting flags on PE sections for use by drivers. The sections
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* .text, .data, .idata, .bss are marked as non-pageable and
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* non-discarable, section PAGE is marked as pageable and section
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* INIT is marked as discaradable.
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*
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* - Sorting of export name table in executables. DLLTOOL has bug
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* in sorting algorithm when the --kill-at flag is used. The exports
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* are sorted in the decorated form and so the fastcall symbols are
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* incorrectly put at the beginning of export table. This option
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* allow to correct sort the table, so binary search can be used
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* to process them.
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* - Updating the PE header to use a LOAD_CONFIG,
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* when the struct is exported with the name '_load_config_used'
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <fcntl.h>
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#include <unistd.h>
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#ifndef O_BINARY
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#define O_BINARY 0
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#endif
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// host_includes
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#include <typedefs.h>
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#include <pecoff.h>
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#include "../../dll/win32/dbghelp/compat.h"
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/* The following definitions are ripped from MinGW W32API headers. We don't
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use these headers directly in order to allow compilation on Linux hosts. */
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typedef unsigned char BYTE, *PBYTE;
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typedef unsigned short WORD;
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typedef unsigned int DWORD;
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typedef int LONG;
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typedef long LONG_PTR;
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#define IMAGE_NUMBEROF_DIRECTORY_ENTRIES 16
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#define IMAGE_SIZEOF_SHORT_NAME 8
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#define IMAGE_DOS_SIGNATURE 0x5A4D
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#define IMAGE_NT_SIGNATURE 0x00004550
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#define IMAGE_SCN_MEM_DISCARDABLE 0x2000000
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#define IMAGE_SCN_MEM_NOT_PAGED 0x8000000
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#define FIELD_OFFSET(t,f) ((LONG)(LONG_PTR)&(((t*)0)->f))
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#define IMAGE_FIRST_SECTION(h) ((PIMAGE_SECTION_HEADER) ((unsigned long)h+FIELD_OFFSET(IMAGE_NT_HEADERS,OptionalHeader)+((PIMAGE_NT_HEADERS)(h))->FileHeader.SizeOfOptionalHeader))
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#define IMAGE_DIRECTORY_ENTRY_EXPORT 0
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#pragma pack(2)
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typedef struct _IMAGE_DOS_HEADER {
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WORD e_magic;
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WORD e_cblp;
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WORD e_cp;
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WORD e_crlc;
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WORD e_cparhdr;
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WORD e_minalloc;
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WORD e_maxalloc;
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WORD e_ss;
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WORD e_sp;
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WORD e_csum;
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WORD e_ip;
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WORD e_cs;
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WORD e_lfarlc;
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WORD e_ovno;
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WORD e_res[4];
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WORD e_oemid;
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WORD e_oeminfo;
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WORD e_res2[10];
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LONG e_lfanew;
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} IMAGE_DOS_HEADER,*PIMAGE_DOS_HEADER;
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#pragma pack(4)
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#pragma pack(4)
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typedef struct _IMAGE_EXPORT_DIRECTORY {
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DWORD Characteristics;
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DWORD TimeDateStamp;
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WORD MajorVersion;
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WORD MinorVersion;
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DWORD Name;
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DWORD Base;
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DWORD NumberOfFunctions;
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DWORD NumberOfNames;
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DWORD AddressOfFunctions;
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DWORD AddressOfNames;
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DWORD AddressOfNameOrdinals;
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} IMAGE_EXPORT_DIRECTORY,*PIMAGE_EXPORT_DIRECTORY;
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typedef struct _IMAGE_FILE_HEADER {
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WORD Machine;
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WORD NumberOfSections;
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DWORD TimeDateStamp;
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DWORD PointerToSymbolTable;
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DWORD NumberOfSymbols;
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WORD SizeOfOptionalHeader;
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WORD Characteristics;
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} IMAGE_FILE_HEADER, *PIMAGE_FILE_HEADER;
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typedef struct _IMAGE_DATA_DIRECTORY {
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DWORD VirtualAddress;
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DWORD Size;
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} IMAGE_DATA_DIRECTORY,*PIMAGE_DATA_DIRECTORY;
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typedef struct _IMAGE_OPTIONAL_HEADER {
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WORD Magic;
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BYTE MajorLinkerVersion;
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BYTE MinorLinkerVersion;
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DWORD SizeOfCode;
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DWORD SizeOfInitializedData;
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DWORD SizeOfUninitializedData;
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DWORD AddressOfEntryPoint;
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DWORD BaseOfCode;
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DWORD BaseOfData;
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DWORD ImageBase;
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DWORD SectionAlignment;
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DWORD FileAlignment;
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WORD MajorOperatingSystemVersion;
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WORD MinorOperatingSystemVersion;
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WORD MajorImageVersion;
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WORD MinorImageVersion;
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WORD MajorSubsystemVersion;
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WORD MinorSubsystemVersion;
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DWORD Reserved1;
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DWORD SizeOfImage;
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DWORD SizeOfHeaders;
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DWORD CheckSum;
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WORD Subsystem;
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WORD DllCharacteristics;
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DWORD SizeOfStackReserve;
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DWORD SizeOfStackCommit;
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DWORD SizeOfHeapReserve;
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DWORD SizeOfHeapCommit;
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DWORD LoaderFlags;
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DWORD NumberOfRvaAndSizes;
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IMAGE_DATA_DIRECTORY DataDirectory[IMAGE_NUMBEROF_DIRECTORY_ENTRIES];
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} IMAGE_OPTIONAL_HEADER,*PIMAGE_OPTIONAL_HEADER;
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typedef struct _IMAGE_NT_HEADERS {
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DWORD Signature;
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IMAGE_FILE_HEADER FileHeader;
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IMAGE_OPTIONAL_HEADER OptionalHeader;
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} IMAGE_NT_HEADERS,*PIMAGE_NT_HEADERS;
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typedef struct _IMAGE_SECTION_HEADER {
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BYTE Name[IMAGE_SIZEOF_SHORT_NAME];
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union {
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DWORD PhysicalAddress;
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DWORD VirtualSize;
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} Misc;
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DWORD VirtualAddress;
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DWORD SizeOfRawData;
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DWORD PointerToRawData;
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DWORD PointerToRelocations;
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DWORD PointerToLinenumbers;
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WORD NumberOfRelocations;
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WORD NumberOfLinenumbers;
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DWORD Characteristics;
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} IMAGE_SECTION_HEADER,*PIMAGE_SECTION_HEADER;
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#pragma pack(4)
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/* End of ripped definitions */
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typedef struct _export_t {
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DWORD name;
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WORD ordinal;
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} export_t;
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unsigned char *buffer;
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PIMAGE_DOS_HEADER dos_header;
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PIMAGE_NT_HEADERS nt_header;
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static inline WORD dtohs(WORD in)
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void *rva_to_ptr(unsigned char *buffer, PIMAGE_NT_HEADERS nt_header, DWORD rva)
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{
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PBYTE in_ptr = (PBYTE)∈
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return in_ptr[0] | (in_ptr[1] << 8);
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unsigned int i;
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PIMAGE_SECTION_HEADER section_header = IMAGE_FIRST_SECTION(nt_header);
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for (i = 0; i < nt_header->FileHeader.NumberOfSections; i++, section_header++)
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{
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if (rva >= section_header->VirtualAddress &&
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rva < section_header->VirtualAddress + section_header->Misc.VirtualSize)
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{
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return buffer + rva - section_header->VirtualAddress + section_header->PointerToRawData;
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}
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}
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return NULL;
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}
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static inline WORD htods(WORD in)
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static void fix_checksum(unsigned char *buffer, long len, PIMAGE_NT_HEADERS nt_header)
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{
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WORD out;
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PBYTE out_ptr = (PBYTE)&out;
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out_ptr[0] = in; out_ptr[1] = in >> 8;
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return out;
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unsigned int checksum = 0;
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long n;
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nt_header->OptionalHeader.CheckSum = 0;
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for (n = 0; n < len; n += 2)
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{
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checksum += *(unsigned short *)(buffer + n);
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checksum = (checksum + (checksum >> 16)) & 0xffff;
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}
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checksum += len;
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nt_header->OptionalHeader.CheckSum = checksum;
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}
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static inline DWORD dtohl(DWORD in)
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static int add_loadconfig(unsigned char *buffer, PIMAGE_NT_HEADERS nt_header)
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{
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PBYTE in_ptr = (PBYTE)∈
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return in_ptr[0] | (in_ptr[1] << 8) | (in_ptr[2] << 16) | (in_ptr[3] << 24);
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}
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PIMAGE_DATA_DIRECTORY export_dir;
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PIMAGE_EXPORT_DIRECTORY export_directory;
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static inline DWORD htodl(DWORD in)
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{
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DWORD out;
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PBYTE out_ptr = (PBYTE)&out;
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out_ptr[0] = in ; out_ptr[1] = in >> 8;
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out_ptr[2] = in >> 16; out_ptr[3] = in >> 24;
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return out;
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}
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export_dir = &nt_header->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT];
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if (export_dir->Size != 0)
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{
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export_directory = rva_to_ptr(buffer, nt_header, export_dir->VirtualAddress);
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if (export_directory != NULL)
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{
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DWORD *name_ptr, *function_ptr, n;
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WORD *ordinal_ptr;
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void *rva_to_ptr(DWORD rva)
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{
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PIMAGE_SECTION_HEADER section_header;
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unsigned int i;
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name_ptr = rva_to_ptr(buffer, nt_header, export_directory->AddressOfNames);
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ordinal_ptr = rva_to_ptr(buffer, nt_header, export_directory->AddressOfNameOrdinals);
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function_ptr = rva_to_ptr(buffer, nt_header, export_directory->AddressOfFunctions);
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for (i = 0, section_header = IMAGE_FIRST_SECTION(nt_header);
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i < dtohl(nt_header->FileHeader.NumberOfSections);
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i++, section_header++)
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{
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if (rva >= dtohl(section_header->VirtualAddress) &&
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rva < dtohl(section_header->VirtualAddress) +
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dtohl(section_header->Misc.VirtualSize))
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{
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return buffer + rva - dtohl(section_header->VirtualAddress) +
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dtohl(section_header->PointerToRawData);
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}
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}
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for (n = 0; n < export_directory->NumberOfNames; n++)
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{
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const char* name = rva_to_ptr(buffer, nt_header, name_ptr[n]);
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if (!strcmp(name, "_load_config_used"))
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{
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PIMAGE_DATA_DIRECTORY load_config_dir;
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DWORD load_config_rva = function_ptr[ordinal_ptr[n]];
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DWORD* load_config_ptr = rva_to_ptr(buffer, nt_header, load_config_rva);
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return NULL;
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}
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/* Update the DataDirectory pointer / size
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The first entry of the LOAD_CONFIG struct is the size, use that as DataDirectory.Size */
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load_config_dir = &nt_header->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_LOAD_CONFIG];
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load_config_dir->VirtualAddress = load_config_rva;
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load_config_dir->Size = *load_config_ptr;
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int export_compare_func(const void *a, const void *b)
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{
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const export_t *ap = a;
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const export_t *bp = b;
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char *an = rva_to_ptr(ap->name);
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char *bn = rva_to_ptr(bp->name);
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return strcmp(an, bn);
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return 0;
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}
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}
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fprintf(stderr, "Export '_load_config_used' not found\n");
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}
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else
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{
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fprintf(stderr, "Invalid rva for export directory\n");
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}
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}
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else
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{
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fprintf(stderr, "No export directory\n");
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}
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return 1;
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}
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int main(int argc, char **argv)
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{
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int fd_in, fd_out;
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long len;
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char hdrbuf[4] = { }, elfhdr[4] = { '\177', 'E', 'L', 'F' };
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PIMAGE_SECTION_HEADER section_header;
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PIMAGE_DATA_DIRECTORY data_dir;
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unsigned int i;
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unsigned long checksum;
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int fixup_exports = 0;
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int fixup_sections = 0;
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FILE* file;
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long len;
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unsigned char *buffer;
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PIMAGE_DOS_HEADER dos_header;
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int result = 1;
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/*
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* Process parameters.
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*/
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if (argc < 2)
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{
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printf("Usage: %s <filename>\n", argv[0]);
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return 1;
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}
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if (argc < 2)
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{
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printf("Usage: %s <filename> <options>\n"
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"Options:\n"
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" -sections Sets section flags for PE image.\n"
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" -exports Sort the names in export table.\n",
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argv[0]);
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return 1;
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}
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/* Read the whole file to memory. */
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file = fopen(argv[1], "r+b");
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if (!file)
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{
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fprintf(stderr, "Can't open '%s'.\n", argv[1]);
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return 1;
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}
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for (i = 2; i < argc; i++)
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{
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if (!strcmp(argv[i], "-sections"))
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fixup_sections = 1;
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else if (!strcmp(argv[i], "-exports"))
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fixup_exports = 1;
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else
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{ fprintf(stderr, "Invalid option: %s\n", argv[i]); return 1; }
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}
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fseek(file, 0, SEEK_END);
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len = ftell(file);
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if (len < sizeof(IMAGE_DOS_HEADER))
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{
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fclose(file);
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fprintf(stderr, "'%s' isn't a PE image (too short)\n", argv[1]);
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return 1;
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}
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/*
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* Nothing to do.
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*/
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if (fixup_sections == 0 && fixup_exports == 0)
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return 0;
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/* Add one byte extra for the case where the input file size is odd.
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We rely on this in our crc calculation */
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buffer = calloc(len + 1, 1);
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if (buffer == NULL)
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{
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fclose(file);
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fprintf(stderr, "Not enough memory available.\n");
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return 1;
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}
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/*
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* Read the whole file to memory.
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*/
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/* Read the whole input file into a buffer */
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fseek(file, 0, SEEK_SET);
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fread(buffer, 1, len, file);
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fd_in = open(argv[1], O_RDONLY | O_BINARY);
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if (fd_in == 0)
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{
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fprintf(stderr, "Can't open input file.\n");
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return 1;
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}
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/* Check the headers and save pointers to them. */
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dos_header = (PIMAGE_DOS_HEADER)buffer;
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if (dos_header->e_magic == IMAGE_DOS_SIGNATURE)
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{
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PIMAGE_NT_HEADERS nt_header;
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/*
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* PowerPC ReactOS uses elf, so doesn't need pefixup
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*/
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len = read(fd_in, hdrbuf, sizeof(elfhdr));
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if (!memcmp(hdrbuf, elfhdr, sizeof(elfhdr)))
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{
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close(fd_in);
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return 0;
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}
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nt_header = (PIMAGE_NT_HEADERS)(buffer + dos_header->e_lfanew);
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len = lseek(fd_in, 0, SEEK_END);
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if (len < sizeof(IMAGE_DOS_HEADER))
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{
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close(fd_in);
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fprintf(stderr, "'%s' isn't a PE image (too short)\n", argv[1]);
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return 1;
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}
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/* Lower down we overwrite the byte at len, so here, we need at least
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* one more byte than len. We'll be guaranteed one or two now. */
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buffer = malloc((len + 2) & ~1);
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if (buffer == NULL)
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{
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close(fd_in);
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fprintf(stderr, "Not enough memory available.\n");
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return 1;
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}
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/* Read the whole input file into a buffer */
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lseek(fd_in, 0, SEEK_SET);
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read(fd_in, buffer, len);
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/* Here is where the block end overwrite was */
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if (len & 1)
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buffer[len] = 0;
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close(fd_in);
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/*
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* Check the headers and save pointers to them.
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*/
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dos_header = (PIMAGE_DOS_HEADER)buffer;
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nt_header = (PIMAGE_NT_HEADERS)(buffer + dtohl(dos_header->e_lfanew));
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if (dtohs(dos_header->e_magic) != IMAGE_DOS_SIGNATURE ||
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dtohl(nt_header->Signature) != IMAGE_NT_SIGNATURE)
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{
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fprintf(stderr, "'%s' isn't a PE image (bad headers)\n", argv[1]);
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free(buffer);
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return 1;
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}
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if (fixup_exports)
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{
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/* Sort export directory */
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data_dir = &nt_header->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT];
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if (dtohl(data_dir->Size) != 0)
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{
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PIMAGE_EXPORT_DIRECTORY export_directory;
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DWORD *name_ptr;
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WORD *ordinal_ptr;
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export_t *exports;
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export_directory = (PIMAGE_EXPORT_DIRECTORY)rva_to_ptr(dtohl(data_dir->VirtualAddress));
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if (export_directory != NULL)
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{
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exports = malloc(sizeof(export_t) * dtohl(export_directory->NumberOfNames));
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if (exports == NULL)
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if (nt_header->Signature == IMAGE_NT_SIGNATURE)
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{
|
||||
if (!add_loadconfig(buffer, nt_header))
|
||||
{
|
||||
fprintf(stderr, "Not enough memory.\n");
|
||||
free(buffer);
|
||||
return 1;
|
||||
fix_checksum(buffer, len, nt_header);
|
||||
|
||||
/* We could 'optimize by only writing the changed parts, but keep it simple for now */
|
||||
fseek(file, 0, SEEK_SET);
|
||||
fwrite(buffer, 1, len, file);
|
||||
|
||||
/* Success */
|
||||
result = 0;
|
||||
}
|
||||
|
||||
name_ptr = (DWORD *)rva_to_ptr(dtohl(export_directory->AddressOfNames));
|
||||
ordinal_ptr = (WORD *)rva_to_ptr(dtohl(export_directory->AddressOfNameOrdinals));
|
||||
|
||||
for (i = 0; i < dtohl(export_directory->NumberOfNames); i++)
|
||||
else
|
||||
{
|
||||
exports[i].name = dtohl(name_ptr[i]);
|
||||
exports[i].ordinal = dtohl(ordinal_ptr[i]);
|
||||
/* Error already printed inside add_loadconfig */
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
fprintf(stderr, "'%s' Invalid PE signature: %x\n", argv[1], nt_header->Signature);
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
fprintf(stderr, "'%s' Invalid DOS signature: %x\n", argv[1], dos_header->e_magic);
|
||||
}
|
||||
|
||||
qsort(exports, dtohl(export_directory->NumberOfNames), sizeof(export_t),
|
||||
export_compare_func);
|
||||
free(buffer);
|
||||
fclose(file);
|
||||
|
||||
for (i = 0; i < dtohl(export_directory->NumberOfNames); i++)
|
||||
{
|
||||
name_ptr[i] = htodl(exports[i].name);
|
||||
ordinal_ptr[i] = htodl(exports[i].ordinal);
|
||||
}
|
||||
|
||||
free(exports);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (fixup_sections)
|
||||
{
|
||||
/* Update section flags */
|
||||
for (i = 0, section_header = IMAGE_FIRST_SECTION(nt_header);
|
||||
i < dtohl(nt_header->FileHeader.NumberOfSections);
|
||||
i++, section_header++)
|
||||
{
|
||||
if (!strcmp((char*)section_header->Name, ".text") ||
|
||||
!strcmp((char*)section_header->Name, ".data") ||
|
||||
!strcmp((char*)section_header->Name, ".idata") ||
|
||||
!strcmp((char*)section_header->Name, ".rdata") ||
|
||||
!strcmp((char*)section_header->Name, ".bss"))
|
||||
{
|
||||
section_header->Characteristics |= htodl(IMAGE_SCN_MEM_NOT_PAGED);
|
||||
section_header->Characteristics &= htodl(~IMAGE_SCN_MEM_DISCARDABLE);
|
||||
}
|
||||
else if (!strcmp((char*)section_header->Name, "INIT"))
|
||||
{
|
||||
section_header->Characteristics |= htodl(IMAGE_SCN_MEM_DISCARDABLE);
|
||||
}
|
||||
else if (!strcmp((char*)section_header->Name, "PAGE"))
|
||||
{
|
||||
section_header->Characteristics |= htodl(IMAGE_SCN_MEM_NOT_PAGED);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* Recalculate checksum */
|
||||
nt_header->OptionalHeader.CheckSum = 0;
|
||||
checksum = 0;
|
||||
for (i = 0; i < len; i += 2)
|
||||
{
|
||||
checksum += *(unsigned short *)(buffer + i);
|
||||
checksum = (checksum + (checksum >> 16)) & 0xffff;
|
||||
}
|
||||
checksum += len;
|
||||
nt_header->OptionalHeader.CheckSum = htods(checksum);
|
||||
|
||||
/* Write the output file */
|
||||
fd_out = open(argv[1], O_WRONLY | O_BINARY);
|
||||
write(fd_out, buffer, len);
|
||||
close(fd_out);
|
||||
|
||||
return 0;
|
||||
return result;
|
||||
}
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue