mirror of
https://github.com/reactos/reactos.git
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100 lines
2.3 KiB
C
100 lines
2.3 KiB
C
/*
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* PROJECT: ReactOS SDK Library
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* LICENSE: LGPL, see LGPL.txt in top level directory.
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* FILE: lib/sdk/delayimp/delayimp.c
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* PURPOSE: Library for delay importing from dlls
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* PROGRAMMERS: Timo Kreuzer <timo.kreuzer@reactos.org>
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*
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*/
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#include <windows.h>
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#include <delayimp.h>
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/**** load helper ****/
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FARPROC WINAPI
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__delayLoadHelper2(PCImgDelayDescr pidd, PImgThunkData pIATEntry)
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{
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DelayLoadInfo dli;
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int index;
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PImgThunkData pIAT;
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PImgThunkData pINT;
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HMODULE *phMod;
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FARPROC pProc;
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pIAT = PFromRva(pidd->rvaIAT);
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pINT = PFromRva(pidd->rvaINT);
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phMod = PFromRva(pidd->rvaHmod);
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index = IndexFromPImgThunkData(pIATEntry, pIAT);
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dli.cb = sizeof(dli);
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dli.pidd = pidd;
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dli.ppfn = (FARPROC*)pIATEntry->u1.Function;
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dli.szDll = PFromRva(pidd->rvaDLLName);
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dli.dlp.fImportByName = !(pINT[index].u1.Ordinal & IMAGE_ORDINAL_FLAG);
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if (dli.dlp.fImportByName)
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{
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/* u1.AdressOfData points to a IMAGE_IMPORT_BY_NAME struct */
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PIMAGE_IMPORT_BY_NAME piibn = PFromRva((RVA)pINT[index].u1.AddressOfData);
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dli.dlp.szProcName = (LPCSTR)&piibn->Name;
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}
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else
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{
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dli.dlp.dwOrdinal = pINT[index].u1.Ordinal & ~IMAGE_ORDINAL_FLAG;
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}
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dli.hmodCur = *phMod;
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dli.pfnCur = (FARPROC)pIAT[index].u1.Function;
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dli.dwLastError = GetLastError();
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pProc = __pfnDliNotifyHook2(dliStartProcessing, &dli);
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if (pProc)
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{
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pIAT[index].u1.Function = (DWORD_PTR)pProc;
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return pProc;
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}
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if (dli.hmodCur == NULL)
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{
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dli.hmodCur = LoadLibraryA(dli.szDll);
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if (!dli.hmodCur)
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{
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dli.dwLastError = GetLastError();
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__pfnDliFailureHook2(dliFailLoadLib, &dli);
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// if (ret)
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// {
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// }
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// FIXME: raise exception;
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return NULL;
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}
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*phMod = dli.hmodCur;
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}
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/* dli.dlp.szProcName might also contain the ordinal */
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pProc = GetProcAddress(dli.hmodCur, dli.dlp.szProcName);
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if (!pProc)
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{
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dli.dwLastError = GetLastError();
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__pfnDliFailureHook2(dliFailGetProc, &dli);
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// FIXME: handle return value & raise exception
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return NULL;
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}
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pIAT[index].u1.Function = (DWORD_PTR)pProc;
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return pProc;
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}
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/*** The default hooks ***/
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FARPROC WINAPI
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DefaultDliNotifyHook2(unsigned dliNotify, PDelayLoadInfo pdli)
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{
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return NULL;
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}
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FARPROC WINAPI
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DefaultDliFailureHook2(unsigned dliNotify, PDelayLoadInfo pdli)
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{
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return NULL;
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}
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PfnDliHook __pfnDliNotifyHook2 = DefaultDliNotifyHook2;
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PfnDliHook __pfnDliFailureHook2 = DefaultDliFailureHook2;
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