delayimp.h File Reference

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Classes
struct	ImgDelayDescr
struct	DelayLoadProc
struct	DelayLoadInfo

Macros
#define	_DELAY_IMP_VER   2
#define	ExternC   extern
#define	VcppException(sev, err)   ((sev) | (FACILITY_VISUALCPP<<16) | err)

Typedefs
typedef IMAGE_THUNK_DATA *	PImgThunkData
typedef const IMAGE_THUNK_DATA *	PCImgThunkData
typedef DWORD	RVA
typedef struct ImgDelayDescr	ImgDelayDescr
typedef struct ImgDelayDescr *	PImgDelayDescr
typedef const ImgDelayDescr *	PCImgDelayDescr
typedef struct DelayLoadProc	DelayLoadProc
typedef struct DelayLoadInfo	DelayLoadInfo
typedef struct DelayLoadInfo *	PDelayLoadInfo
typedef FARPROC(WINAPI *	PfnDliHook) (unsigned dliNotify, PDelayLoadInfo pdli)

Enumerations
enum	DLAttr { dlattrRva = 0x1 }
enum	{   dliStartProcessing, dliNoteStartProcessing = dliStartProcessing, dliNotePreLoadLibrary, dliNotePreGetProcAddress,   dliFailLoadLib, dliFailGetProc, dliNoteEndProcessing }

Functions
ExternC BOOL WINAPI	__FUnloadDelayLoadedDLL2 (LPCSTR szDll)
ExternC HRESULT WINAPI	__HrLoadAllImportsForDll (LPCSTR szDll)

Variables
ExternC const PfnDliHook	__pfnDliNotifyHook2
ExternC const PfnDliHook	__pfnDliFailureHook2

Macro Definition Documentation

#define _DELAY_IMP_VER   2

#define ExternC   extern

#define VcppException	(		sev,
			err
	)		((sev) | (FACILITY_VISUALCPP<<16) | err)

Typedef Documentation

typedef struct DelayLoadInfo DelayLoadInfo

typedef struct DelayLoadProc DelayLoadProc

typedef struct ImgDelayDescr ImgDelayDescr

typedef const ImgDelayDescr* PCImgDelayDescr

typedef const IMAGE_THUNK_DATA* PCImgThunkData

typedef struct DelayLoadInfo * PDelayLoadInfo

typedef FARPROC(WINAPI * PfnDliHook) (unsigned dliNotify, PDelayLoadInfo pdli)

typedef struct ImgDelayDescr * PImgDelayDescr

typedef IMAGE_THUNK_DATA* PImgThunkData

typedef DWORD RVA

Enumeration Type Documentation

anonymous enum

Enumerator
dliStartProcessing
dliNoteStartProcessing
dliNotePreLoadLibrary
dliNotePreGetProcAddress
dliFailLoadLib
dliFailGetProc
dliNoteEndProcessing

     {
    dliStartProcessing,             // used to bypass or note helper only
    dliNoteStartProcessing = dliStartProcessing,

    dliNotePreLoadLibrary,          // called just before LoadLibrary, can
                                    //  override w/ new HMODULE return val
    dliNotePreGetProcAddress,       // called just before GetProcAddress, can
                                    //  override w/ new FARPROC return value
    dliFailLoadLib,                 // failed to load library, fix it by
                                    //  returning a valid HMODULE
    dliFailGetProc,                 // failed to get proc address, fix it by
                                    //  returning a valid FARPROC
    dliNoteEndProcessing,           // called after all processing is done, no
                                    //  no bypass possible at this point except
                                    //  by longjmp()/throw()/RaiseException.
    };

enum DLAttr

Enumerator
dlattrRva

            {                   // Delay Load Attributes
    dlattrRva = 0x1,                // RVAs are used instead of pointers
                                    // Having this set indicates a VC7.0
                                    // and above delay load descriptor.
    };

Function Documentation

ExternC BOOL WINAPI __FUnloadDelayLoadedDLL2

(

LPCSTR

szDll

)

                                       {
    BOOL        fRet = FALSE;
    PCImgDelayDescr pidd = PiddFromDllName(szDll);

    if ((pidd != NULL) && 
        (pidd->rvaUnloadIAT != 0)) {
        HMODULE *           phmod = PFromRva<HMODULE*>(pidd->rvaHmod);
        HMODULE             hmod = *phmod;
        if (hmod != NULL) {

            DloadAcquireSectionWriteAccess();

            OverlayIAT(
                PFromRva<PImgThunkData>(pidd->rvaIAT),
                PFromRva<PCImgThunkData>(pidd->rvaUnloadIAT)
                );
            ::FreeLibrary(hmod);
            *phmod = NULL;

            DloadReleaseSectionWriteAccess();

            fRet = TRUE;
            }

        }
    return fRet;
    }

ExternC HRESULT WINAPI __HrLoadAllImportsForDll

(

LPCSTR

szDll

)

                                       {
    HRESULT             hrRet = HRESULT_FROM_WIN32(ERROR_MOD_NOT_FOUND);
    PCImgDelayDescr     pidd = PiddFromDllName(szDll);

    if (pidd != NULL) {
        // Found a matching DLL name, now process it.
        //
        // Set up the internal structure
        //
        FARPROC *   ppfnIATEntry = PFromRva<FARPROC*>(pidd->rvaIAT);
        size_t      cpfnIATEntries = CountOfImports(PCImgThunkData(ppfnIATEntry));
        FARPROC *   ppfnIATEntryMax = ppfnIATEntry + cpfnIATEntries;

        for (;ppfnIATEntry < ppfnIATEntryMax; ppfnIATEntry++) {
            __delayLoadHelper2(pidd, ppfnIATEntry);
            }

        // Done, indicate some semblance of success
        //
        hrRet = S_OK;
        }
    return hrRet;
    }

Variable Documentation

ExternC const PfnDliHook __pfnDliFailureHook2

ExternC const PfnDliHook __pfnDliNotifyHook2