504 lines
14 KiB
C++
504 lines
14 KiB
C++
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//+---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1992 - 1994.
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//
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// File: inv32.cxx
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//
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// Contents: Implementation of InvokeOn32
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//
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// History: 22-Feb-94 DrewB Created
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//
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//----------------------------------------------------------------------------
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#include "headers.cxx"
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#pragma hdrstop
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STDAPI_(BOOL) IsValidInterface( void FAR* pv );
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#include <apilist.hxx>
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//+---------------------------------------------------------------------------
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//
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// Function: InvokeOn32, public
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//
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// Synopsis: Sets up the THUNKINFO and starts thunking for a 16->32 call
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//
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// Arguments: [dw1] - Ignored
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// [dwMethod] - Method index
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// [pvStack32] - 32-bit stack
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//
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// Returns: Appropriate status code
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//
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// History: 18-Dec-93 JohannP Created
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// 21-Feb-94 DrewB Modified
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// 09-Dec-94 JohannP added stack switching
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//
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// Note: On WIN95 this function get is executed on the 32 bit stack.
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//
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//----------------------------------------------------------------------------
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#if DBG == 1
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extern "C"
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{
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ULONG InvokeOn32_count = 0;
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ULONG InvokeOn32_break = 0;
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int _iInvokeOn32BreakIidx = -1;
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int _iInvokeOn32BreakMethod = -1;
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};
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#endif
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// InvokeOn32 uses a lot of local variables so allocate its locals
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// rather than declaring them on the stack. This saves roughly
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// 150 bytes of stack per call
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struct INVOKE32RECORD
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{
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THOP CONST *pThop;
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THOP CONST * CONST *ppThop;
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UINT uiThop;
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VTBLFN CONST *pvfnVtbl;
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VTBLFN CONST * CONST *ppvfnThis32;
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DWORD dwStack32[MAX_PARAMS];
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THUNKINFO ti;
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VPVOID vpvThis16;
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THUNK1632OBJ UNALIGNED *pto;
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IIDIDX iidx;
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ThreadData *ptd;
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};
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STDAPI_(DWORD) SSAPI(InvokeOn32)(DWORD dw1, DWORD dwMethod, LPVOID pvStack16)
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{
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// NOTE: Do not declare local variables in this routine
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// except for debug builds
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INVOKE32RECORD *pir;
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DWORD dwResult;
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#if DBG == 1
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ULONG ulInvokeOn32_count = ++InvokeOn32_count;
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if (InvokeOn32_count == InvokeOn32_break)
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{
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DebugBreak();
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}
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thkDebugOut((DEB_ITRACE, "%sInvokeOn32(0x%08x, %p)\n",
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NestingLevelString(),
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dwMethod, pvStack16));
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#endif // DBG
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if(!TlsThkGetData())
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return(CO_E_NOTINITIALIZED);
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pir = (INVOKE32RECORD *)STACKALLOC32(sizeof(INVOKE32RECORD));
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if (pir == NULL)
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{
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// This error isn't guaranteed to mean anything for
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// this call. Not much else we can do, though
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return (DWORD)E_OUTOFMEMORY;
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}
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// pvStack16 is the pointer to the first parameter of the 16-bit
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// routine. The compiler will adjust it appropriately according
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// to the calling convention of the routine so for PASCAL APIs
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// it will be high and for CDECL methods it will be low
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pir->ti.s16.pbStart = (BYTE *)pvStack16;
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pir->ti.s16.pbCurrent = pir->ti.s16.pbStart;
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pir->ti.s32.pbStart = (BYTE *)pir->dwStack32;
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pir->ti.s32.pbCurrent = pir->ti.s32.pbStart;
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pir->ti.scResult = S_OK;
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pir->ti.fResultThunked = FALSE;
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if (dwMethod >= THK_API_BASE)
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{
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dwMethod -= THK_API_BASE;
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pir->iidx = IIDIDX_INVALID;
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// APIs are handled as if there were a giant interface which
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// contains all the APIs as methods.
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pir->ppThop = apthopsApiThops;
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pir->uiThop = THK_API_COUNT;
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pir->pvfnVtbl = apfnApiFunctions;
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// APIs are pascal so we need to move downward in memory to
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// get to the next parameter
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pir->ti.s16.iDir = -1;
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pir->ti.dwCallerProxy = 0;
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}
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else
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{
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// For each interface there is an array of thop strings, one for
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// each method. The IUnknown methods don't have thop strings so
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// bias the thop string pointer to account for that
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thkAssert(dwMethod >= SMI_COUNT);
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// Methods are cdecl so we need to move upwards in memory to
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// get to the next parameter
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pir->ti.s16.iDir = 1;
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// We need to look up the appropriate method pointer by
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// looking in the 32-bit object's vtable
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GET_STACK16(&pir->ti, pir->vpvThis16, VPVOID);
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thkDebugOut((DEB_INVOKES,
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"InvokeOn32: vpvThis16 = %08lX\n", pir->vpvThis16 ));
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pir->pto = FIXVDMPTR(pir->vpvThis16, THUNK1632OBJ);
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if (pir->pto == NULL)
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{
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STACKFREE32(pir, sizeof(INVOKE32RECORD));
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return (DWORD)E_INVALIDARG;
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}
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if ((pir->pto->grfFlags & PROXYFLAG_TEMPORARY) == 0)
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{
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// Make sure proxy is still valid.
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// After PPC/Win95 we might want to look at using
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// a signiture for validating this rather than IsValidInterface
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// because it will speed this code path up.
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if (!IsValidInterface(pir->pto->punkThis32))
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{
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thkDebugOut((
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DEB_ERROR, "InvokeOn32: %p: Invalid proxied object %p\n",
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pir->vpvThis16, pir->pto->punkThis32));
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STACKFREE32(pir, sizeof(INVOKE32RECORD));
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RELVDMPTR(pir->vpvThis16);
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return (DWORD)E_INVALIDARG;
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}
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DebugValidateProxy1632(pir->vpvThis16);
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pir->ppvfnThis32 = (VTBLFN CONST * CONST*)pir->pto->punkThis32;
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}
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else
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{
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// Temporary proxies cannot be validated
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// A temporary proxy's this pointer is actually a pointer
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// to the real this pointer, so indirect through the this
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// pointer to retrieve the real this pointer
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pir->ppvfnThis32 = (VTBLFN CONST * CONST *)*(void **)pir->pto->punkThis32;
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thkAssert(pir->ppvfnThis32 != NULL);
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thkDebugOut((DEB_WARN, "WARNING: InvokeOn32 on temporary "
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"%s proxy for %p\n", IidIdxString(pir->pto->iidx),
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pir->ppvfnThis32));
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}
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pir->iidx = pir->pto->iidx;
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RELVDMPTR(pir->vpvThis16);
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if (pir->ppvfnThis32 == NULL)
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{
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STACKFREE32(pir, sizeof(INVOKE32RECORD));
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return (DWORD)E_FAIL;
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}
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pir->ti.dwCallerProxy = pir->vpvThis16;
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thkAssert(pir->iidx < THI_COUNT);
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pir->ppThop = athopiInterfaceThopis[pir->iidx].ppThops-SMI_COUNT;
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pir->uiThop = athopiInterfaceThopis[pir->iidx].uiSize;
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pir->pvfnVtbl = *pir->ppvfnThis32;
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// Push the 32-bit this pointer on the stack first
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TO_STACK32(&pir->ti, pir->ppvfnThis32, VTBLFN CONST * CONST*);
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}
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thkAssert(dwMethod < pir->uiThop);
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pir->pThop = pir->ppThop[dwMethod];
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thkAssert(pir->pThop != NULL);
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pir->ti.pThop = pir->pThop;
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pir->ti.pvfn = pir->pvfnVtbl[dwMethod];
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pir->ti.iidx = pir->iidx;
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pir->ti.dwMethod = dwMethod;
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pir->ptd = TlsThkGetData();
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if (pir->ptd == NULL)
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{
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thkDebugOut((DEB_WARN, "WARNING: InvokeOn32: Call refused\n"));
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STACKFREE32(pir, sizeof(INVOKE32RECORD));
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return (DWORD)E_FAIL;
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}
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pir->ti.pThkMgr = pir->ptd->pCThkMgr;
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thkAssert(pir->ti.pThkMgr != NULL);
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#if DBG == 1
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if (pir->iidx == IIDIDX_INVALID)
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{
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thkDebugOut((DEB_INVOKES, "%s#(%04X):InvokeOn32 on %p, %s\n",
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NestingLevelString(), ulInvokeOn32_count,
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pir->ti.pvfn, apszApiNames[dwMethod]));
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}
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else
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{
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thkDebugOut((DEB_INVOKES, "%s#(%04X):InvokeOn32 on %p:%p, %s::%s (0x%0x:0x%0x)\n",
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NestingLevelString(), ulInvokeOn32_count,
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pir->ppvfnThis32, pir->ti.pvfn,
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inInterfaceNames[pir->iidx].pszInterface,
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inInterfaceNames[pir->iidx].ppszMethodNames[dwMethod],
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pir->iidx,
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dwMethod));
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}
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#endif
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DebugIncrementNestingLevel();
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// save and set the new thunk state
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pir->ti.pThkMgr->SetThkState(THKSTATE_INVOKETHKIN32);
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#if DBG == 1
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if ((_iInvokeOn32BreakIidx > 0 &&
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_iInvokeOn32BreakIidx == (int)pir->iidx) &&
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(_iInvokeOn32BreakMethod < 0 ||
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_iInvokeOn32BreakMethod == (int)dwMethod))
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{
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DebugBreak();
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}
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#endif
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#if DBG == 1
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SStackRecord sr;
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RecordStackState16(&sr);
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#endif
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#if DBG == 1
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if (fStabilizeProxies)
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#endif
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{
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// HACK HACK HACK
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// Because of changes in the way refcounting rules work between
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// 16 and 32-bits, we have to stabilize this pointers for
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// 16->32 calls. To effect this, we do a purely local AddRef
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//
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// Temporary proxies are not valid proxies so they cannot
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// be stabilized
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if (pir->iidx != IIDIDX_INVALID)
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{
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DWORD dwFlags;
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pir->pto = FIXVDMPTR(pir->vpvThis16, THUNK1632OBJ);
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dwFlags = pir->pto->grfFlags;
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RELVDMPTR(pir->vpvThis16);
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if ((dwFlags & PROXYFLAG_TEMPORARY) == 0)
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{
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pir->ti.pThkMgr->AddRefProxy1632(pir->vpvThis16);
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}
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}
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}
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dwResult = EXECUTE_THOP1632(&pir->ti);
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#if DBG == 1
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if (fStabilizeProxies)
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#endif
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{
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// Remove our stabilization reference
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// Note that we don't really know whether the proxy is
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// still valid, so we're just crossing our fingers here
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// and hoping that things continue to work
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if (pir->iidx != IIDIDX_INVALID)
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{
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DWORD dwFlags;
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pir->pto = FIXVDMPTR(pir->vpvThis16, THUNK1632OBJ);
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dwFlags = pir->pto->grfFlags;
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RELVDMPTR(pir->vpvThis16);
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if ((dwFlags & PROXYFLAG_TEMPORARY) == 0)
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{
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DebugValidateProxy1632(pir->vpvThis16);
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pir->ti.pThkMgr->ReleaseProxy1632(pir->vpvThis16);
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}
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}
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}
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#if DBG == 1
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if ( !pir->ti.fResultThunked && FAILED(dwResult) )
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{
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if (pir->iidx == IIDIDX_INVALID)
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{
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thkDebugOut((DEB_FAILURES,
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"InvokeOn32 probable failure %s sc = %08lX\n",
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apszApiNames[dwMethod],
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dwResult));
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}
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else
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{
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thkDebugOut((DEB_FAILURES,
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"InvokeOn32 probable failure %s::%s sc = %08lX\n",
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inInterfaceNames[pir->iidx].pszInterface,
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inInterfaceNames[pir->iidx].ppszMethodNames[dwMethod],
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dwResult));
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}
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if(thkInfoLevel & DEB_DBGFAIL)
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thkAssert(!"Wish to Debug");
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}
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CheckStackState16(&sr);
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#endif
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pir->ti.pThkMgr->SetThkState(THKSTATE_NOCALL);
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DebugDecrementNestingLevel();
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if ( !pir->ti.fResultThunked )
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{
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dwResult = TransformHRESULT_3216( dwResult );
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}
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#if DBG == 1
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if (pir->iidx == IIDIDX_INVALID)
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{
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thkDebugOut((DEB_INVOKES,
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"%s#(%04X):InvokeOn32 on %p, %s returns 0x%08lX\n",
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NestingLevelString(), ulInvokeOn32_count, pir->ti.pvfn,
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apszApiNames[dwMethod], dwResult ));
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}
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else
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{
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thkDebugOut((DEB_INVOKES,
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"%s#(%04X):InvokeOn32 on %p:%p, %s::%s returns 0x%08lX\n",
|
||
|
|
NestingLevelString(), ulInvokeOn32_count,
|
||
|
|
pir->ppvfnThis32,
|
||
|
|
pir->ti.pvfn, inInterfaceNames[pir->iidx].pszInterface,
|
||
|
|
inInterfaceNames[pir->iidx].ppszMethodNames[dwMethod],
|
||
|
|
dwResult));
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
STACKFREE32(pir, sizeof(INVOKE32RECORD));
|
||
|
|
|
||
|
|
return dwResult;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
#ifdef _CHICAGO_
|
||
|
|
//+---------------------------------------------------------------------------
|
||
|
|
//
|
||
|
|
// Function: SSCallback16
|
||
|
|
//
|
||
|
|
// Synopsis: Switches to 16 bit and calls back to 16 bit.
|
||
|
|
//
|
||
|
|
// Arguments: [vpfn16] -- function pointer
|
||
|
|
// [dwParam] -- pointer to parameter
|
||
|
|
//
|
||
|
|
// Returns:
|
||
|
|
//
|
||
|
|
// History: 12-08-94 JohannP (Johann Posch) Created
|
||
|
|
//
|
||
|
|
// Notes:
|
||
|
|
//
|
||
|
|
//----------------------------------------------------------------------------
|
||
|
|
DWORD WINAPI SSCallback16(DWORD vpfn16, DWORD dwParam)
|
||
|
|
{
|
||
|
|
DWORD dwRet;
|
||
|
|
// switch to the 16 bit stack
|
||
|
|
//
|
||
|
|
if (SSONBIGSTACK())
|
||
|
|
{
|
||
|
|
StackDebugOut((DEB_STCKSWTCH, "%sSSCallback16 32->16(%p)\n",NestingLevelString(), vpfn16));
|
||
|
|
dwRet = SSCall(8, SSF_SmallStack, WOWCallback16, vpfn16, dwParam);
|
||
|
|
StackDebugOut((DEB_STCKSWTCH, "%sSSCallback16 32<-16 done\n",NestingLevelString() ));
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
dwRet = WOWCallback16(vpfn16, dwParam);
|
||
|
|
}
|
||
|
|
return dwRet;
|
||
|
|
}
|
||
|
|
|
||
|
|
//+---------------------------------------------------------------------------
|
||
|
|
//
|
||
|
|
// Function: SSCallback16Ex
|
||
|
|
//
|
||
|
|
// Synopsis: Like SSCallback16 except can handle up 16 bytes of parametes
|
||
|
|
//
|
||
|
|
// Arguments: [vpfn16] -- see Callback16Ex
|
||
|
|
// [dwFlags] --
|
||
|
|
// [cbArgs] --
|
||
|
|
// [pArgs] --
|
||
|
|
// [pdwRetCode] --
|
||
|
|
//
|
||
|
|
// Returns:
|
||
|
|
//
|
||
|
|
// History: 12-08-94 JohannP (Johann Posch) Created
|
||
|
|
//
|
||
|
|
// Notes:
|
||
|
|
//
|
||
|
|
//----------------------------------------------------------------------------
|
||
|
|
BOOL WINAPI SSCallback16Ex(DWORD vpfn16, DWORD dwFlags,
|
||
|
|
DWORD cbArgs, PVOID pArgs, PDWORD pdwRetCode)
|
||
|
|
{
|
||
|
|
DWORD dwRet;
|
||
|
|
// switch to the 16 bit stack
|
||
|
|
//
|
||
|
|
if (SSONBIGSTACK())
|
||
|
|
{
|
||
|
|
StackDebugOut((DEB_STCKSWTCH, "%sSSCallback16Ex 32->16 (%p)\n",NestingLevelString(), vpfn16));
|
||
|
|
dwRet = SSCall(20, SSF_SmallStack, WOWCallback16Ex,vpfn16, dwFlags, cbArgs, pArgs, pdwRetCode);
|
||
|
|
StackDebugOut((DEB_STCKSWTCH, "%sSSCallback16Ex 32<-16 done\n",NestingLevelString() ));
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
dwRet = WOWCallback16Ex(vpfn16, dwFlags, cbArgs, pArgs, pdwRetCode);
|
||
|
|
}
|
||
|
|
return dwRet;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
//+---------------------------------------------------------------------------
|
||
|
|
//
|
||
|
|
// Function: InvokeOn32
|
||
|
|
//
|
||
|
|
// Synopsis: Switches to the 32 bit stack and calls SSAPI(InvokeOn32)
|
||
|
|
//
|
||
|
|
// Arguments: [dw1] -- See SSAPI(InvokeOn32)
|
||
|
|
// [dwMethod] --
|
||
|
|
// [pvStack16] --
|
||
|
|
//
|
||
|
|
// Returns:
|
||
|
|
//
|
||
|
|
// History: 12-08-94 JohannP (Johann Posch) Created
|
||
|
|
//
|
||
|
|
// Notes: Only executed under WIN95
|
||
|
|
//
|
||
|
|
//----------------------------------------------------------------------------
|
||
|
|
STDAPI_(DWORD) InvokeOn32 (DWORD dw1, DWORD dwMethod, LPVOID pvStack16)
|
||
|
|
{
|
||
|
|
DWORD dwRes;
|
||
|
|
if (SSONSMALLSTACK())
|
||
|
|
{
|
||
|
|
StackDebugOut((DEB_STCKSWTCH, "%sSSInvokeOn32 16->32 (0x%08x, %p)\n",
|
||
|
|
NestingLevelString(), dwMethod, pvStack16));
|
||
|
|
dwRes = SSCall(12 ,SSF_BigStack, SSInvokeOn32, dw1, dwMethod, pvStack16);
|
||
|
|
StackDebugOut((DEB_STCKSWTCH, "%sSSInvokeOn32 16<-32 done(0x%08x, %p)\n",
|
||
|
|
NestingLevelString(), dwMethod, pvStack16));
|
||
|
|
}
|
||
|
|
else
|
||
|
|
dwRes = SSInvokeOn32(dw1, dwMethod, pvStack16);
|
||
|
|
|
||
|
|
return dwRes;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif // _CHICAGO_
|
||
|
|
|