164 lines
4.5 KiB
C
164 lines
4.5 KiB
C
/*
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library.h - custom dlls loader
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Copyright (C) 2008 Uncle Mike
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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*/
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#ifndef LIBRARY_H
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#define LIBRARY_H
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#define DOS_SIGNATURE 0x5A4D // MZ
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#define NT_SIGNATURE 0x00004550 // PE00
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#define NUMBER_OF_DIRECTORY_ENTRIES 16
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#define MAX_LIBRARY_EXPORTS 4096
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#ifndef IMAGE_SIZEOF_BASE_RELOCATION
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#define IMAGE_SIZEOF_BASE_RELOCATION ( sizeof( IMAGE_BASE_RELOCATION ))
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#endif
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typedef struct
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{
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// dos .exe header
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word e_magic; // magic number
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word e_cblp; // bytes on last page of file
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word e_cp; // pages in file
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word e_crlc; // relocations
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word e_cparhdr; // size of header in paragraphs
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word e_minalloc; // minimum extra paragraphs needed
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word e_maxalloc; // maximum extra paragraphs needed
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word e_ss; // initial (relative) SS value
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word e_sp; // initial SP value
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word e_csum; // checksum
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word e_ip; // initial IP value
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word e_cs; // initial (relative) CS value
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word e_lfarlc; // file address of relocation table
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word e_ovno; // overlay number
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word e_res[4]; // reserved words
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word e_oemid; // OEM identifier (for e_oeminfo)
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word e_oeminfo; // OEM information; e_oemid specific
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word e_res2[10]; // reserved words
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long e_lfanew; // file address of new exe header
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} DOS_HEADER;
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typedef struct
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{
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// win .exe 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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} PE_HEADER;
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typedef struct
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{
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byte Name[8]; // dos name length
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union
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{
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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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} SECTION_HEADER;
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typedef struct
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{
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dword VirtualAddress;
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dword Size;
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} DATA_DIRECTORY;
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typedef struct
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{
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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 Win32VersionValue;
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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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DATA_DIRECTORY DataDirectory[NUMBER_OF_DIRECTORY_ENTRIES];
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} OPTIONAL_HEADER;
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typedef struct
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{
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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; // RVA from base of image
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dword AddressOfNames; // RVA from base of image
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dword AddressOfNameOrdinals; // RVA from base of image
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} EXPORT_DIRECTORY;
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typedef struct dll_user_s
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{
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void *hInstance; // instance handle
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qboolean custom_loader; // a bit who indicated loader type
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qboolean encrypted; // dll is crypted (some client.dll in HL, CS etc)
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char dllName[32]; // for debug messages
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string fullPath, shortPath; // actual dll paths
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// ordinals stuff
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word *ordinals;
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dword *funcs;
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char *names[MAX_LIBRARY_EXPORTS]; // max 4096 exports supported
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int num_ordinals; // actual exports count
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dword funcBase; // base offset
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} dll_user_t;
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dll_user_t *FS_FindLibrary( const char *dllname, qboolean directpath );
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void *COM_LoadLibrary( const char *dllname, int build_ordinals_table, qboolean directpath );
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void *COM_GetProcAddress( void *hInstance, const char *name );
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const char *COM_NameForFunction( void *hInstance, dword function );
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dword COM_FunctionFromName( void *hInstance, const char *pName );
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void COM_FreeLibrary( void *hInstance );
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#endif//LIBRARY_H
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