xash3d-fwgs/engine/common/library.h

164 lines
4.4 KiB
C

/*
library.h - custom dlls loader
Copyright (C) 2008 Uncle Mike
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
*/
#ifndef LIBRARY_H
#define LIBRARY_H
#define DOS_SIGNATURE 0x5A4D // MZ
#define NT_SIGNATURE 0x00004550 // PE00
#define NUMBER_OF_DIRECTORY_ENTRIES 16
#define MAX_LIBRARY_EXPORTS 4096
typedef struct
{
// dos .exe header
word e_magic; // magic number
word e_cblp; // bytes on last page of file
word e_cp; // pages in file
word e_crlc; // relocations
word e_cparhdr; // size of header in paragraphs
word e_minalloc; // minimum extra paragraphs needed
word e_maxalloc; // maximum extra paragraphs needed
word e_ss; // initial (relative) SS value
word e_sp; // initial SP value
word e_csum; // checksum
word e_ip; // initial IP value
word e_cs; // initial (relative) CS value
word e_lfarlc; // file address of relocation table
word e_ovno; // overlay number
word e_res[4]; // reserved words
word e_oemid; // OEM identifier (for e_oeminfo)
word e_oeminfo; // OEM information; e_oemid specific
word e_res2[10]; // reserved words
long e_lfanew; // file address of new exe header
} DOS_HEADER;
typedef struct
{
// win .exe header
word Machine;
word NumberOfSections;
dword TimeDateStamp;
dword PointerToSymbolTable;
dword NumberOfSymbols;
word SizeOfOptionalHeader;
word Characteristics;
} PE_HEADER;
typedef struct
{
byte Name[8]; // dos name length
union
{
dword PhysicalAddress;
dword VirtualSize;
} Misc;
dword VirtualAddress;
dword SizeOfRawData;
dword PointerToRawData;
dword PointerToRelocations;
dword PointerToLinenumbers;
word NumberOfRelocations;
word NumberOfLinenumbers;
dword Characteristics;
} SECTION_HEADER;
typedef struct
{
dword VirtualAddress;
dword Size;
} DATA_DIRECTORY;
typedef struct
{
word Magic;
byte MajorLinkerVersion;
byte MinorLinkerVersion;
dword SizeOfCode;
dword SizeOfInitializedData;
dword SizeOfUninitializedData;
dword AddressOfEntryPoint;
dword BaseOfCode;
dword BaseOfData;
dword ImageBase;
dword SectionAlignment;
dword FileAlignment;
word MajorOperatingSystemVersion;
word MinorOperatingSystemVersion;
word MajorImageVersion;
word MinorImageVersion;
word MajorSubsystemVersion;
word MinorSubsystemVersion;
dword Win32VersionValue;
dword SizeOfImage;
dword SizeOfHeaders;
dword CheckSum;
word Subsystem;
word DllCharacteristics;
dword SizeOfStackReserve;
dword SizeOfStackCommit;
dword SizeOfHeapReserve;
dword SizeOfHeapCommit;
dword LoaderFlags;
dword NumberOfRvaAndSizes;
DATA_DIRECTORY DataDirectory[NUMBER_OF_DIRECTORY_ENTRIES];
} OPTIONAL_HEADER;
typedef struct
{
dword Characteristics;
dword TimeDateStamp;
word MajorVersion;
word MinorVersion;
dword Name;
dword Base;
dword NumberOfFunctions;
dword NumberOfNames;
dword AddressOfFunctions; // RVA from base of image
dword AddressOfNames; // RVA from base of image
dword AddressOfNameOrdinals; // RVA from base of image
} EXPORT_DIRECTORY;
typedef struct dll_user_s
{
void *hInstance; // instance handle
qboolean custom_loader; // a bit who indicated loader type
qboolean encrypted; // dll is crypted (some client.dll in HL, CS etc)
char dllName[32]; // for debug messages
string fullPath, shortPath; // actual dll paths
// ordinals stuff
word *ordinals;
dword *funcs;
char *names[MAX_LIBRARY_EXPORTS]; // max 4096 exports supported
int num_ordinals; // actual exports count
dword funcBase; // base offset
} dll_user_t;
dll_user_t *FS_FindLibrary( const char *dllname, qboolean directpath );
void *COM_LoadLibrary( const char *dllname, int build_ordinals_table, qboolean directpath );
void *COM_GetProcAddress( void *hInstance, const char *name );
const char *COM_NameForFunction( void *hInstance, void *function );
void *COM_FunctionFromName_SR( void *hInstance, const char *pName ); // Save/Restore version
void *COM_FunctionFromName( void *hInstance, const char *pName );
void COM_FreeLibrary( void *hInstance );
void COM_ResetLibraryError( void );
const char *COM_GetLibraryError( void );
#endif//LIBRARY_H