156 lines
5.7 KiB
C
156 lines
5.7 KiB
C
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/****************************************************************************
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* filename - DelayImp.h
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*
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* structures and prototypes necessary for delay loading of imports.
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* Delay loading of DLL imports is selected when building a module by
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*
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*
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* This technology supports delayed loading of DLLs for arbitrary images.
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*
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* Restrictions:
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* You cannot delay loading of a reference to imported data.
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* You cannot delay loading of KERNEL32.DLL.
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* You cannot delay loading of the RTLDLL (since these routines need
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* to be present to support delayed loading).
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* You must be very careful with using __FUnloadDelayLoadedDLL in a
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* multithreaded environment. It is possible to cause problems
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* if one thread gets a delay loaded function address from this
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* module, at the same time as another thread unloads the delayed
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* load DLL. There is no way for us to guard against that, so
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* the user has to be aware of the possibility.
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*
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* Notes:
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* TLS support works for delayed load DLLs with Borland tools, as we
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* have worked around the OS restrictions of handling TLS variables in
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* dynamically loaded DLLs.
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*
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****************************************************************************/
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/*
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* C/C++ Run Time Library - Version 10.0
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*
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* Copyright (c) 1999, 2000 by Inprise Corporation
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* All Rights Reserved.
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*
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*/
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/* $Revision: 9.4 $ */
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#ifndef __DELAYIMP_H
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#define __DELAYIMP_H
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#include <windows.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct ImgDelayDescr
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{
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DWORD grAttrs; /* attributes */
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LPCSTR szName; /* pointer to dll name */
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HMODULE hmod; /* address of module handle */
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IMAGE_THUNK_DATA * pIAT; /* address of the IAT */
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IMAGE_THUNK_DATA * pINT; /* address of the INT */
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IMAGE_THUNK_DATA * pBoundIAT; /* address of the optional bound IAT */
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IMAGE_THUNK_DATA * pUnloadIAT; /* address of optional copy of
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original IAT */
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DWORD dwTimeStamp; /* 0 if not bound, */
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/* O.W. date/time stamp of DLL bound
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to (Old BIND) */
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} ImgDelayDescr;
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/* Delay load import hook notifications */
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typedef enum
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{
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dliNoteStartProcessing, /* used to bypass or note helper only */
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dliNotePreLoadLibrary, /* called just before LoadLibrary, can */
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/* override w/ new HMODULE return val */
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dliNotePreGetProcAddress, /* called just before GetProcAddress, can */
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/* override w/ new FARPROC return value */
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dliFailLoadLibrary, /* failed to load library, fix it by */
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/* returning a valid HMODULE */
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dliFailGetProcAddress, /* failed to get proc address, fix it by */
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/* returning a valid FARPROC */
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dliNoteEndProcessing, /* called after all processing is done, */
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/* no bypass possible at this point */
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/* except by longjmp(), throw(), or
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RaiseException. */
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} dliNotification;
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typedef struct DelayLoadProc
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{
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BOOL fImportByName;
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union
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{
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LPCSTR szProcName;
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DWORD dwOrdinal;
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};
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} DelayLoadProc;
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typedef struct DelayLoadInfo
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{
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DWORD cb; /* size of structure */
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const ImgDelayDescr * pidd; /* raw form of data (everything is
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there) */
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FARPROC * ppfn; /* points to address of function to
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load */
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LPCSTR szDll; /* name of dll */
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DelayLoadProc dlp; /* name or ordinal of procedure */
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HMODULE hmodCur; /* the hInstance of the library we
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have loaded */
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FARPROC pfnCur; /* the actual function that will be
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called */
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DWORD dwLastError;/* error received (if an error
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notification) */
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} DelayLoadInfo, *PDelayLoadInfo;
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typedef FARPROC (WINAPI *DelayedLoadHook)(
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dliNotification dliNotify,
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DelayLoadInfo * pdli
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);
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/* Unload support */
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/* routine definition; takes a pointer to a name to unload, or NULL to
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unload all the delay load dlls in the list.
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*/
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BOOL WINAPI __FUnloadDelayLoadedDLL(LPCSTR szDll);
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/* Hook pointers */
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/* The "notify hook" gets called for every call to the
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delay load helper. This allows a user to hook every call and
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skip the delay load helper entirely.
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dliNotify ==
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{
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dliNoteStartProcessing |
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dliNotePreLoadLibrary |
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dliNotePreGetProcAddress |
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dliNoteEndProcessing
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}
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on this call.
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*/
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extern DelayedLoadHook _EXPDATA __pfnDliNotifyHook;
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/* This is the failure hook,
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dliNotify ==
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{
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dliFailLoadLibrary |
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dliFailGetProcAddress
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}
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*/
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extern DelayedLoadHook _EXPDATA __pfnDliFailureHook;
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#ifdef __cplusplus
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}
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#endif
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#endif /* __DELAYIMP_H */
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