diff -r 000000000000 -r a41df078684a userlibandfileserver/fileserver/sfile/sf_ldr.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/userlibandfileserver/fileserver/sfile/sf_ldr.cpp	Mon Oct 19 15:55:17 2009 +0100
@@ -0,0 +1,2297 @@
+// Copyright (c) 1995-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of the License "Eclipse Public License v1.0"
+// which accompanies this distribution, and is available
+// at the URL "http://www.eclipse.org/legal/epl-v10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+// f32\sfile\sf_ldr.cpp
+// 
+//
+
+#include "sf_std.h"
+#include <f32image.h>
+#include "sf_image.h"
+#include "sf_cache.h"
+#include "sf_ldr.h"
+#include <e32uid.h>
+#include <hal.h>
+
+
+#ifdef _DEBUG
+#define IF_DEBUG(x)	x
+TInt KernHeapFailCount=0;
+TInt LdrHeapFailCount=0;
+TInt HeapFailActive=0;
+void SetupHeapFail(const RMessage2& aMsg);
+void EndHeapFailCheck(TInt);
+TInt RFsFailCount=0;
+TInt RFsErrorCode=0;
+TBool RFsFailActive=0;
+void SetupRFsFail(const RMessage2& aMsg);
+void EndRFsFailCheck(TInt);
+TRequestStatus ProcessDestructStat;
+TRequestStatus* ProcessDestructStatPtr=0;
+TBool ProcessCreated=EFalse;
+#else
+#define IF_DEBUG(x)
+#endif
+TInt DoLoaderDebugFunction(const RMessage2& aMsg);
+
+
+//#define __TRACE_LOADER_HEAP__
+
+class RLoaderFs : public RFs
+	{
+public:
+	inline TInt SendReceive(TInt aFunction, const TIpcArgs& aArgs) const
+		{ return RSessionBase::SendReceive(aFunction, aArgs); }
+	};
+
+static TInt CheckLibraryHash(RLdrReq& aReq);
+const TInt KPriorityVeryHigh=14641;
+
+GLDEF_D RFs gTheLoaderFs;
+GLDEF_D TAny* gExeCodeSeg;
+GLDEF_D TUint32 gExeAttr;
+GLDEF_D TAny* gKernelCodeSeg;
+GLDEF_D TUint32 gKernelAttr;
+GLDEF_D SSecurityInfo gKernelSecInfo;
+GLDEF_D TBool gExecutesInSupervisorMode;
+GLDEF_D TAny* gFileServerCodeSeg;
+GLDEF_D TUint32 gFileServerAttr;
+GLDEF_D SSecurityInfo gFileServerSecInfo;
+GLDEF_D CActiveReaper* gActiveReaper=NULL;
+
+CSlottedChunkAllocator gFileDataAllocator;
+
+
+GLREF_D TCodePageUtils TheCodePage;
+
+
+_LIT(KDriveSystemRoot, "?:\\");
+_LIT(KLoaderThreadName, "LoaderThread");
+_LIT8(KFileExtensionExe,".EXE");
+_LIT8(KFileExtensionDll,".DLL");
+_LIT8(KFileExtensionLdd,".LDD");
+_LIT8(KFileExtensionPdd,".PDD");
+_LIT8(KFileExtensionFsy,".FSY");
+_LIT8(KFileExtensionFxt,".FXT");
+_LIT8(KFileExtensionPxt,".PXT");
+_LIT8(KFileExtensionPxy,".PXY");
+_LIT(KPathDel,"?:\\sys\\del\\");
+const TInt KPathDelLength = 11; 
+const TInt KExtensionLength=4;
+
+#if defined(__EPOC32__) && defined(__X86__)
+TInt UseFloppy;
+#endif
+
+/******************************************************************************
+ * Loader top level stuff
+ ******************************************************************************/
+
+TUint32 GetCodeSegAttr(TAny* aCodeSeg, SSecurityInfo* aS, TUint32* aVer)
+	{
+	TCodeSegCreateInfo info;
+	E32Loader::CodeSegInfo(aCodeSeg, info);
+	if (aS)
+		*aS = info.iS;
+	if (aVer)
+		*aVer = info.iModuleVersion;
+	return info.iAttr;
+	}
+
+#ifdef __EPOC32__
+extern void InitExecuteInSupervisorMode();
+#endif
+
+_LIT(KNullThreadName,"EKern*Null");
+void GetKernelInfo()
+	{
+	TFindThread ft(KNullThreadName);
+	TFullName fn;
+	TInt r = ft.Next(fn);
+	if (r==KErrNone)
+		{
+		RThread null;
+		r = null.Open(ft);
+		if (r==KErrNone)
+			{
+			gKernelCodeSeg = E32Loader::ThreadProcessCodeSeg(null.Handle());
+			if (gKernelCodeSeg)
+				{
+				gKernelAttr = GetCodeSegAttr(gKernelCodeSeg, &gKernelSecInfo, NULL);
+				__IF_DEBUG(Printf("gKernelCodeSeg=%08x", gKernelCodeSeg));
+				__IF_DEBUG(Printf("gKernelAttr=%08x", gKernelAttr));
+				}
+			else
+				r=KErrGeneral;
+			null.Close();
+			}
+		}
+	if (r==KErrNone)
+		{
+		gFileServerCodeSeg = E32Loader::ThreadProcessCodeSeg(KCurrentThreadHandle);
+		if (gFileServerCodeSeg)
+			{
+			gFileServerAttr = GetCodeSegAttr(gFileServerCodeSeg, &gFileServerSecInfo, NULL);
+			__IF_DEBUG(Printf("gFileServerCodeSeg=%08x", gFileServerCodeSeg));
+			__IF_DEBUG(Printf("gFileServerAttr=%08x", gFileServerAttr));
+			}
+		else
+			r=KErrGeneral;
+		}
+
+#ifdef __EPOC32__
+	InitExecuteInSupervisorMode();
+#else
+	// When running on the emulator the loader can access all memory so effectively it is
+	// running in supervisor mode.
+	gExecutesInSupervisorMode = ETrue;
+#endif
+
+	__ASSERT_ALWAYS(r==KErrNone, Fault(ELdrGetKernelInfoFailed));
+	}
+
+
+#ifdef __TRACE_LOADER_HEAP__
+void InstallHeapTracer();
+#endif
+
+
+#ifdef __LAZY_DLL_UNLOAD
+const TInt KLoaderLazyDllDurationDefault=120;      // 120 seconds default
+TInt KLoaderLazyDllDuration=KLoaderLazyDllDurationDefault;
+CLazyUnloadTimer* LazyUnloadTimer=NULL;
+
+void CLazyUnloadTimer::New()
+//
+// Create a new CLazyUnloadTimer.
+//
+	{
+
+	CLazyUnloadTimer* lazyUnloadTimer=new CLazyUnloadTimer;
+	if(lazyUnloadTimer)
+		{
+		TRAPD(err,lazyUnloadTimer->ConstructL());
+		if(err==KErrNone)
+			{
+			lazyUnloadTimer->Start();
+			}
+		else
+			{
+			delete lazyUnloadTimer;
+			}
+		}
+	}
+
+CLazyUnloadTimer::CLazyUnloadTimer()
+//
+// Constructor
+//
+	: CTimer(EPriorityIdle)
+	{
+	Finish();
+	LazyUnloadTimer = this;
+	if (KLoaderLazyDllDuration < 0) 
+		KLoaderLazyDllDuration = KLoaderLazyDllDurationDefault;
+	}
+
+CLazyUnloadTimer::~CLazyUnloadTimer()
+	{
+	LazyUnloadTimer = NULL;
+	}
+
+void CLazyUnloadTimer::Start()
+	{
+	E32Loader::CodeSegDeferDeletes();
+	CActiveScheduler::Add(this);
+	TTimeIntervalMicroSeconds32 timeout=KLoaderLazyDllDuration*1000000;
+	After(timeout);
+	}
+
+void CLazyUnloadTimer::RunL()
+//
+// The timer has completed.
+//
+	{
+	E32Loader::CodeSegEndDeferDeletes();
+	delete this;
+	}
+
+void CLazyUnloadTimer::Finish()
+	{
+	if(LazyUnloadTimer)
+		{
+		LazyUnloadTimer->Cancel();
+		LazyUnloadTimer->RunL();
+		}
+	}
+
+#endif
+
+/* ReaperCleanupTimer - Used to clear /sys/del/ shortly after boot. */
+
+const TInt KLoaderReaperCleanupTimeDefault=60;      // 60 seconds default
+TInt KLoaderReaperCleanupTime=KLoaderReaperCleanupTimeDefault;
+CReaperCleanupTimer* CReaperCleanupTimer::Timer=NULL;
+
+TInt CReaperCleanupTimer::New()
+//
+// Create a new CReaperCleanupTimer.
+//
+	{
+	if (Timer)
+		return KErrInUse;
+	
+	CReaperCleanupTimer* timer=new CReaperCleanupTimer;
+	if(timer)
+		{
+		TRAPD(err,Timer->ConstructL());
+		if(err==KErrNone)
+			{
+			Timer->Start();
+			return KErrNone;
+			}
+		else
+			{
+			delete Timer;
+			return err;
+			}
+		}
+	return KErrNoMemory;
+	}
+
+CReaperCleanupTimer::CReaperCleanupTimer()
+	: CTimer(EPriorityIdle)
+	{
+	Timer=this;
+	}
+	
+CReaperCleanupTimer::~CReaperCleanupTimer()
+	{
+	Timer = NULL;
+	}
+
+void CReaperCleanupTimer::Start()
+	{
+	CActiveScheduler::Add(this);
+	TTimeIntervalMicroSeconds32 timeout=KLoaderReaperCleanupTime*1000000;
+	After(timeout);
+	}
+
+void CReaperCleanupTimer::RunL()
+	{
+	if (gActiveReaper)
+		gActiveReaper->InitDelDir();
+	delete this;
+	}
+	
+void CReaperCleanupTimer::Complete()
+	{
+	if(Timer)
+		{
+		Timer->Cancel();
+		Timer->RunL();
+		}
+	}	
+
+GLDEF_C TInt LoaderThread(TAny*)
+//
+// The loader thread.
+//
+	{
+#ifdef __TRACE_LOADER_HEAP__
+	InstallHeapTracer();
+#endif
+
+	TInt r;
+    __IF_DEBUG(Printf("LoaderThread"));
+	User::SetCritical(User::ESystemCritical);
+	GetKernelInfo();
+
+	CServerLoader* serverLoader;
+	CActiveSchedulerLoader* scheduler;
+
+	CTrapCleanup* cleanup=CTrapCleanup::New();
+	__ASSERT_ALWAYS(cleanup!=NULL, Fault(ELdrCleanupCreate));
+	scheduler=CActiveSchedulerLoader::New();
+	__ASSERT_ALWAYS(scheduler!=NULL, Fault(ELdrSchedulerCreate));
+	serverLoader=CServerLoader::New();
+	__ASSERT_ALWAYS(serverLoader!=NULL, Fault(ELdrServerCreate));
+
+	RThread::Rendezvous(KErrNone);
+	r=gTheLoaderFs.Connect();
+	__ASSERT_ALWAYS(r==KErrNone, Fault(ELdrFsConnect));
+	TBuf<sizeof(KDriveSystemRoot)> driveSystemRoot(KDriveSystemRoot);
+	driveSystemRoot[0] = (TUint8) RFs::GetSystemDriveChar();
+	r=gTheLoaderFs.SetSessionPath(driveSystemRoot);
+	__ASSERT_ALWAYS(r==KErrNone, Fault(ELdrFsSetPath));
+
+#ifdef __EPOC32__
+	InitializeFileNameCache();
+
+	r=gFileDataAllocator.Construct();
+	__ASSERT_ALWAYS(r==KErrNone, Fault(ELdrFileDataAllocInit));
+#endif
+
+#ifdef __LAZY_DLL_UNLOAD
+	CLazyUnloadTimer::New();
+#endif
+	
+	gActiveReaper = CActiveReaper::New();
+	__ASSERT_ALWAYS(gActiveReaper!=NULL, Fault(ELdrReaperCreate));
+
+	r=CReaperCleanupTimer::New();
+	__ASSERT_ALWAYS(r==KErrNone, Fault(ELdrReaperCleanupTimerCreate));
+	
+	CActiveSchedulerLoader::Start();
+	Fault(ELdrSchedulerStopped);
+	return 0;
+	}
+
+TInt InitLoader()
+	{
+
+	TRequestStatus lts;
+	RThread loaderThread; 
+	RHeap* h = (RHeap*)&User::Allocator();
+	TInt maxsize = h->MaxLength();	// loader heap max size = file server heap max size
+	TInt r=loaderThread.Create(KLoaderThreadName,LoaderThread,KLoaderStackSize,KHeapMinSize,maxsize,NULL);
+	if (r!=KErrNone)
+		{
+		return r;
+		}
+	loaderThread.Rendezvous(lts);
+	loaderThread.Resume();
+	User::WaitForRequest(lts);
+	loaderThread.Close();
+	return lts.Int();
+	}
+
+TInt CompareVersions(TUint32 aL, TUint32 aR)
+	{
+	if (aL>aR)
+		return 1;
+	if (aL<aR)
+		return -1;
+	return 0;
+	}
+
+TInt DetailedCompareVersions(TUint32 aCandidate, TUint32 aRequest)
+	{
+	if (aRequest == KModuleVersionNull)
+		return EVersion_MinorBigger;
+	if (aCandidate == KModuleVersionNull)
+		return EVersion_MajorSmaller;
+	TUint32 C = aCandidate >> 16;
+	TUint32 c = aCandidate & 0x0000ffffu;
+	TUint32 R = aRequest >> 16;
+	TUint32 r = aRequest & 0x0000ffffu;
+	if (C==R)
+		{
+		if (c>r)
+			return EVersion_MinorBigger;
+		if (c==r)
+			return EVersion_Exact;
+		return EVersion_MinorSmaller;
+		}
+	if (C>R)
+		return EVersion_MajorBigger;
+	return EVersion_MajorSmaller;
+	}
+
+TInt DetailedCompareVersions(TUint32 aCandidate, TUint32 aRequest, TUint32 aCurrent, TBool aStrict)
+	{
+	TInt cvc = DetailedCompareVersions(aCandidate, aCurrent);
+	if (aRequest == KModuleVersionWild)
+		{
+		return (cvc == EVersion_MinorBigger || cvc == EVersion_MajorBigger) ? EAction_Replace : EAction_Skip;
+		}
+	TInt candidate_state = DetailedCompareVersions(aCandidate, aRequest);
+	if (aStrict)
+		{
+		if (candidate_state > EVersion_Exact)
+			return EAction_Skip;	// no match
+		if (cvc == EVersion_MinorBigger)
+			return EAction_Replace;	// later minor version so take it
+		return EAction_Skip;	// same or earlier minor version
+		}
+	TInt current_state = DetailedCompareVersions(aCurrent, aRequest);
+	if (candidate_state < current_state)
+		{
+		// better match
+		if (candidate_state <= EVersion_Exact)
+			return EAction_Replace;
+		return (candidate_state == EVersion_MajorBigger) ? EAction_CheckImports : EAction_CheckLastImport;
+		}
+	if (candidate_state > current_state)
+		return EAction_Skip;	// worse match
+	// match state same
+	// skip if		(i) state=exact
+	//				(ii) state=major smaller
+	// replace if	(i) state=minor bigger and candidate minor > current minor
+	//				(ii) state=minor smaller and candidate minor > current minor
+	//				(iii) state=major bigger, candidate major=current major and candidate minor > current minor
+	// check if		(i) state=major bigger and candidate major < current major
+	switch (candidate_state)
+		{
+		case EVersion_MinorBigger:
+		case EVersion_MinorSmaller:
+			return (cvc == EVersion_MinorBigger) ? EAction_Replace : EAction_Skip;
+		case EVersion_MajorBigger:
+			if (cvc == EVersion_MinorBigger)
+				return EAction_Replace;
+			return (cvc == EVersion_MajorSmaller) ? EAction_CheckImports : EAction_Skip;
+		default:
+			return EAction_Skip;
+		}
+	}
+
+TFileNameInfo::TFileNameInfo()
+	{
+	memclr(this, sizeof(TFileNameInfo));
+	}
+
+TInt TFileNameInfo::Set(const TDesC8& aFileName, TUint aFlags)
+	{
+	__IF_DEBUG(Printf(">TFileNameInfo::Set %S %08x", &aFileName, aFlags));
+	iUid = 0;
+	iVersion = 0;
+	iPathPos = 0;
+	iName = aFileName.Ptr();
+	iLen = aFileName.Length();
+	iExtPos = aFileName.LocateReverse('.');
+	if (iExtPos<0)
+		iExtPos = iLen;
+	TInt osq = aFileName.LocateReverse('[');
+	TInt csq = aFileName.LocateReverse(']');
+	if (!(aFlags & EAllowUid) && (osq>=0 || csq>=0))
+		{
+		__IF_DEBUG(Printf("<TFileNameInfo::Set BadName1"));
+		return KErrBadName;
+		}
+	if (osq>=iExtPos || csq>=iExtPos)
+		{
+		__IF_DEBUG(Printf("<TFileNameInfo::Set BadName2"));
+		return KErrBadName;
+		}
+	TInt p = iExtPos;
+	if ((aFlags & EAllowUid) && p>=10 && iName[p-1]==']' && iName[p-10]=='[')
+		{
+		TPtrC8 uidstr(iName + p - 9, 8);
+		TLex8 uidlex(uidstr);
+		TUint32 uid = 0;
+		TInt r = uidlex.Val(uid, EHex);
+		if (r==KErrNone && uidlex.Eos())
+			iUid = uid, p -= 10;
+		}
+	iUidPos = p;
+	TInt ob = aFileName.LocateReverse('{');
+	TInt cb = aFileName.LocateReverse('}');
+	if (ob>=iUidPos || cb>=iUidPos)
+		{
+		__IF_DEBUG(Printf("<TFileNameInfo::Set BadName3"));
+		return KErrBadName;
+		}
+	if (ob>=0 && cb>=0 && p-1==cb)
+		{
+		TPtrC8 p8(iName, p);
+		TInt d = p8.LocateReverse('.');
+		TPtrC8 verstr(iName+ob+1, p-ob-2);
+		TLex8 verlex(verstr);
+		if (ob==p-10 && d<ob)
+			{
+			TUint32 ver = 0;
+			TInt r = verlex.Val(ver, EHex);
+			if (r==KErrNone && verlex.Eos())
+				iVersion = ver, p = ob;
+			}
+		else if (d>ob && p-1>d && (aFlags & EAllowDecimalVersion))
+			{
+			TUint32 maj = 0;
+			TUint32 min = 0;
+			TInt r = verlex.Val(maj, EDecimal);
+			TUint c = (TUint)verlex.Get();
+			TInt r2 = verlex.Val(min, EDecimal);
+			if (r==KErrNone && c=='.' && r2==KErrNone && verlex.Eos() && maj<32768 && min<32768)
+				iVersion = (maj << 16) | min, p = ob;
+			}
+		}
+	iVerPos = p;
+	if (iLen>=2 && iName[1]==':')
+		{
+		TUint c = iName[0];
+		if (c!='?' || !(aFlags & EAllowPlaceholder))
+			{
+			c |= 0x20;
+			if (c<'a' || c>'z')
+				{
+				__IF_DEBUG(Printf("<TFileNameInfo::Set BadName4"));
+				return KErrBadName;
+				}
+			}
+		iPathPos = 2;
+		}
+	TPtrC8 pathp(iName+iPathPos, iVerPos-iPathPos);
+	if (pathp.Locate('[')>=0 || pathp.Locate(']')>=0 || pathp.Locate('{')>=0 || pathp.Locate('}')>=0 || pathp.Locate(':')>=0)
+		{
+		__IF_DEBUG(Printf("<TFileNameInfo::Set BadName5"));
+		return KErrBadName;
+		}
+	iBasePos = pathp.LocateReverse('\\') + 1 + iPathPos;
+	__IF_DEBUG(Printf("<TFileNameInfo::Set OK"));
+	__LDRTRACE(Dump());
+	return KErrNone;
+	}
+
+void TFileNameInfo::GetName(TDes8& aName, TUint aFlags) const
+	{
+	if (aFlags & EIncludeDrive)
+		aName.Append(Drive());
+	if (aFlags & EIncludePath)
+		{
+		if (PathLen() && iName[iPathPos]!='\\')
+			aName.Append('\\');
+		aName.Append(Path());
+		}
+	if (aFlags & EIncludeBase)
+		aName.Append(Base());
+	if ((aFlags & EForceVer) || ((aFlags & EIncludeVer) && VerLen()) )
+		{
+		aName.Append('{');
+		aName.AppendNumFixedWidth(iVersion, EHex, 8);
+		aName.Append('}');		
+		}
+	if ((aFlags & EForceUid) || ((aFlags & EIncludeUid) && UidLen()) )
+		{
+		aName.Append('[');
+		aName.AppendNumFixedWidth(iUid, EHex, 8);
+		aName.Append(']');
+		}
+	if (aFlags & EIncludeExt)
+		aName.Append(Ext());
+	}
+
+TInt OpenFile8(RFile& aFile, const TDesC8& aName)
+	{
+	TFileName fn;
+	fn.Copy(aName);
+	TInt r = aFile.Open(gTheLoaderFs, fn, EFileStream|EFileRead|EFileShareReadersOnly|EFileReadDirectIO);
+	return r;
+	}
+
+RLdrReq::RLdrReq()
+	{
+	memclr(&iFileName, sizeof(RLdrReq) - sizeof(TLdrInfo));
+	}
+
+void RLdrReq::Close()
+	{
+	delete iFileName;
+	delete iCmd;
+	delete iPath;
+	iClientThread.Close();
+	iClientProcess.Close();
+	}
+
+void RLdrReq::Panic(TInt aPanic)
+	{
+	iMsg->Panic(KLitLoader,aPanic);
+	}
+
+TInt CheckedCollapse(TDes8& aDest, const TDesC16& aSrc)
+	{
+	TInt rl = aSrc.Length();
+	aDest.SetLength(rl);
+	TText8* d = (TText8*)aDest.Ptr();
+	const TText16* s = aSrc.Ptr();
+	const TText16* sE = s + rl;
+	while (s<sE && *s>=0x20u && *s<0x7fu)
+		*d++ = (TText8)*s++;
+	return (s<sE) ? KErrBadName : KErrNone;
+	}
+
+TInt RLoaderMsg::GetString(HBufC8*& aBuf, TInt aParam, TInt aMaxLen, TInt aHeadroom, TBool aReduce) const
+	{
+	aBuf=NULL;
+	TInt l=GetDesLength(aParam);
+	if (l<0)
+		return l;
+	if (l>aMaxLen)
+		return KErrOverflow;
+	aBuf=HBufC8::New((l+aHeadroom)*sizeof(TText));
+	if (!aBuf)
+		return KErrNoMemory;
+	TPtr8 bp8(aBuf->Des());
+	TPtr16 bp16((TText*)bp8.Ptr(), 0, bp8.MaxLength()/sizeof(TText));
+	TInt r = Read(aParam, bp16);
+	if (r == KErrNone)
+		{
+		TInt rl = bp16.Length();
+		if (aReduce)
+			r = CheckedCollapse(bp8, bp16);
+		else
+			bp8.SetLength(rl*sizeof(TText));
+		}
+	if (r!=KErrNone)
+		{
+		delete aBuf;
+		aBuf=NULL;
+		}
+	return r;
+	}
+
+TInt RLoaderMsg::GetLdrInfo(TLdrInfo& aInfo) const
+	{
+	TPckg<TLdrInfo> infoPckg(aInfo);
+	return Read(0, infoPckg);
+	}
+
+TInt RLoaderMsg::UpdateLdrInfo(const TLdrInfo& aInfo) const
+	{
+	TPckgC<TLdrInfo> infoPckg(aInfo);
+	return Write(0, infoPckg);
+	}
+
+TInt RLdrReq::AddFileExtension(const TDesC8& aExt)
+	{
+	if (iFileName->LocateReverse('.')==KErrNotFound)
+		{
+		if (iFileName->Length()+aExt.Length()>KMaxFileName)
+			return KErrBadName;
+		iFileName->Des().Append(aExt);
+		}
+	TInt r = iFileNameInfo.Set(*iFileName, TFileNameInfo::EAllowDecimalVersion);
+	if (r == KErrNone)
+		{
+		TInt l = iFileNameInfo.BaseLen() + iFileNameInfo.ExtLen();
+		if (l > KMaxProcessName)
+			r = KErrBadName;
+		}
+	return r;
+	}
+
+TInt CheckSubstDrive(TDes8& aDest, const TDesC8& aSrc, TBool aIsPathOnly)
+	{
+	TInt r = KErrNone;
+	TInt l = aSrc.Length();
+	TInt mdl = aDest.MaxLength();
+	TInt pathStart = 0;
+	if (l>=3 && aSrc[1]==':')
+		{
+		// drive letter specified...
+		pathStart = 2;
+		TInt drive;
+		TDriveInfo dI;
+		r = RFs::CharToDrive((TChar)aSrc[0], drive);
+		if (r!=KErrNone)
+			{
+			return r;
+			}
+		r = gTheLoaderFs.Drive(dI, drive);
+		if (r!=KErrNone)
+			{
+			return r;
+			}
+		if (dI.iDriveAtt & KDriveAttSubsted)
+			{
+			TPtr16 ptr16(aDest.Expand());
+			r = gTheLoaderFs.Subst(ptr16, drive);
+			if (r!=KErrNone)
+				{
+				return r;
+				}
+			aDest.SetLength(ptr16.Length()*sizeof(TText));
+			aDest.Collapse();
+			TInt srcm = (aSrc[2]=='\\') ? 3 : 2;
+			TPtrC8 rest(aSrc.Mid(srcm));
+			if (rest.Length() + aDest.Length() > mdl)
+				return KErrBadName;
+			aDest.Append(rest);
+			r=1;
+			}
+		}
+
+	if(!PlatSec::ConfigSetting(PlatSec::EPlatSecEnforceSysBin))
+		return r;
+
+	// make sure path starts with "\sys\bin\"...
+
+	// get filename/path...
+	TPtrC8 ptr;
+	if(!r)
+		ptr.Set(aSrc);
+	else
+		ptr.Set(aDest);
+
+	// set pathStart to first character of path (after any initial '\')
+	if(ptr.Length() && ptr[pathStart]=='\\')
+		++pathStart; // drop initial '\'
+
+	// set pathEnd to first character after path (the final '\' if present)
+	TInt pathEnd;
+	if(aIsPathOnly)
+		{
+		pathEnd = ptr.Length();
+		if(pathEnd && ptr[pathEnd-1]==';')
+			--pathEnd; // drop trailing ';'
+		if(pathEnd && ptr[pathEnd-1]=='\\')
+			--pathEnd; // drop trailing '\'
+		}
+	else
+		{
+		pathEnd = ptr.LocateReverse('\\');
+		if(pathEnd<0)
+			return r;	// no path, so end
+		}
+
+	// check if path starts with "sys\bin"...
+	const TUint8* fn = ptr.Ptr();
+	_LIT8(KSysBin,"sys\\bin");
+	const TInt KSysBinLength = 7;
+	if(pathStart+KSysBinLength <= pathEnd)
+		if(KSysBin().CompareF(TPtrC8(fn+pathStart,KSysBinLength))==0)
+			return r;	// path already starts with "sys\bin", so end
+
+	// replace path with "sys\bin"...
+	TBuf8<KMaxFileName*sizeof(TText)> temp;
+	temp.Append(TPtrC8(fn,pathStart));		// add bits before path
+	temp.Append(KSysBin);					// add "sys\bin"
+	TInt rootLen = ptr.Length()-pathEnd;
+	if(temp.Length()+rootLen>temp.MaxLength())
+		return KErrBadName;	// would overflow
+	temp.Append(TPtrC8(fn+pathEnd,rootLen));	// add bits after path
+
+	// return modified string...
+	aDest = temp;
+	return 1;
+	}
+
+
+TInt RLdrReq::CheckForSubstDriveInName()
+	{
+	TBuf8<KMaxFileName*sizeof(TText)> temp;
+	TInt r = CheckSubstDrive(temp, *iFileName, EFalse);
+	if (r<0)
+		{
+		return r;
+		}
+	if (r>0)
+		{
+		TInt l=temp.Length();
+		HBufC8* p = HBufC8::New(l+KExtensionLength);
+		if (!p)
+			return KErrNoMemory;
+		TPtr8 bp8(p->Des());
+		bp8 = temp;		
+		delete iFileName;
+		iFileName = p;
+		r = KErrNone;
+		}
+	return r;
+	}
+
+
+TInt RLdrReq::CheckForSubstDrivesInPath()
+	{
+	if (!iPath)
+		return KErrNone;
+	TBuf8<(KMaxFileName+1)*sizeof(TText)> temp;
+	TInt ppos = 0;
+	TInt plen = iPath->Length();
+	HBufC8* newpath = NULL;
+	while (ppos < plen)
+		{
+		TPtrC8 rmn(iPath->Mid(ppos));
+		TInt term = rmn.Locate(';');
+		TInt pel = (term<0) ? rmn.Length() : term+1;
+		TPtrC8 path_element(iPath->Mid(ppos, pel));
+		ppos += pel;
+		temp.Zero();
+		TInt r = CheckSubstDrive(temp, path_element, ETrue);
+		if (r<0)
+			{
+			delete newpath;
+			return r;
+			}
+		else if (r>0 || newpath)
+			{
+			if(!newpath)
+				{
+				// initialise 'newpath' to contain everything in path before the element just processed...
+				newpath = iPath->Left(ppos-pel).Alloc();
+				if(!newpath)
+					return KErrNoMemory;
+				}
+			// grow 'newpath'...
+			TInt xl = (r>0) ? temp.Length() : pel;
+			HBufC8* np = newpath->ReAlloc(newpath->Length() + xl);
+			if(!np)
+				{
+				delete newpath;
+				return KErrNoMemory;
+				}
+			newpath = np;
+			// append modified path element to the 'newpath'...
+			newpath->Des().Append( (r>0) ? (const TDesC8&)temp : (const TDesC8&)path_element);
+			}
+		}
+	if(newpath)
+		{
+		delete iPath;
+		iPath = newpath;
+		}
+	return KErrNone;
+	}
+
+#ifdef __VC32__
+#pragma warning( disable : 4701 )   // disable warning C4701: local variable 'missingCaps' may be used without having been initialized
+#endif
+
+TInt RLdrReq::CheckSecInfo(const SSecurityInfo& aCandidate) const
+//
+//	Check that the security info of a candidate loadee is sufficient
+//
+	{
+	if (iSecureId && iSecureId != aCandidate.iSecureId)
+		return KErrPermissionDenied;
+
+	SCapabilitySet missingCaps;
+	TUint32 checkFail = 0;
+	for (TInt i=0; i<SCapabilitySet::ENCapW; ++i)
+		{
+		TUint32 missing = iPlatSecCaps[i] & ~aCandidate.iCaps[i];
+		missingCaps[i] = missing;
+		checkFail |= missing;
+		}
+	if(!checkFail)
+		return KErrNone;
+	// Failed check...
+	if(iImporter)
+		{
+#ifndef __REMOVE_PLATSEC_DIAGNOSTICS__
+		return PlatSec::LoaderCapabilityViolation(iImporter->iFileName,*iFileName,missingCaps);
+#else //__REMOVE_PLATSEC_DIAGNOSTICS__
+		return PlatSec::EmitDiagnostic();
+#endif //!__REMOVE_PLATSEC_DIAGNOSTICS__
+		}
+
+#ifndef __REMOVE_PLATSEC_DIAGNOSTICS__
+	return PlatSec::LoaderCapabilityViolation(iClientProcess,*iFileName,missingCaps);
+#else //__REMOVE_PLATSEC_DIAGNOSTICS__
+	return PlatSec::EmitDiagnostic();
+#endif //!__REMOVE_PLATSEC_DIAGNOSTICS__
+	}
+
+#ifdef __VC32__
+#pragma warning( default : 4701 )   // enable warning C4701: local variable 'missingCaps' may be used without having been initialized
+#endif
+
+void CSessionLoader::ServiceL(const RMessage2& aMessage)
+//
+// Handle messages for this server.
+//
+	{
+	const RLoaderMsg& msg = (const RLoaderMsg&)aMessage;
+	TLoaderMsg mid=(TLoaderMsg)msg.Function();
+	__IF_DEBUG(Printf("Loader: RX msg %d", mid));
+	if (mid<1 || mid>=EMaxLoaderMsg)
+		{
+		aMessage.Complete(KErrNotSupported);
+		return;
+		}
+#ifdef __EPOC32__
+#ifdef __X86__
+	UseFloppy = -1;
+#endif
+	TInt r=CheckLoaderCacheInit();
+	if (r!=KErrNone)
+		{
+		aMessage.Complete(r);
+		return;
+		}
+#else
+	TInt r = KErrNone;
+#endif
+#ifdef _DEBUG
+	if(mid==ELoaderDebugFunction)
+		{
+		msg.Complete(DoLoaderDebugFunction(msg));
+		return;
+		}
+#endif
+	if(mid==ELoaderCancelLazyDllUnload)
+		{
+#ifdef __LAZY_DLL_UNLOAD
+		CLazyUnloadTimer::Finish();
+#endif
+		msg.Complete(KErrNone);
+		return;
+		}
+#ifdef _DEBUG
+	gTheLoaderFs.ResourceCountMarkStart();
+#endif
+	if(mid==EGetInfoFromHeader)
+		{
+		r=GetInfoFromHeader(msg);
+#ifdef _DEBUG
+		gTheLoaderFs.ResourceCountMarkEnd();
+#endif
+		msg.Complete(r);
+		return;
+		}
+
+	if (mid == ELdrDelete)
+		{
+		// TCB and AllFiles are sufficient to ensure that write
+		// access to any part of the file system without having to
+		// check substitutions and access rights here.
+		if (! aMessage.HasCapability(ECapabilityTCB, ECapabilityAllFiles, __PLATSEC_DIAGNOSTIC_STRING("ELdrDelete,TCB+AllFiles")))
+			{
+			r = KErrPermissionDenied;
+			}
+		// because this function is a general-purpose replacement for RFs::Delete,
+		// it doesn't use the transformed filename which would be put into ldrReq.iFileName,
+		// but the literal filename which was supplied, provided it is absolute.
+		else
+			{
+			TInt filenameLength = msg.GetDesLength(1);			
+			if(filenameLength<0)
+				r = filenameLength;
+			else 
+				{
+				HBufC* fnSupply = HBufC::New(filenameLength);
+				if(!fnSupply)
+					r = KErrNoMemory;
+				else
+					{
+					TPtr buf = fnSupply->Des();
+					if ((r=msg.Read( 1, buf)) == KErrNone)
+						{		
+						_LIT(KAbsolutePathPattern,"?:\\*");
+						if (fnSupply->MatchF(KAbsolutePathPattern) != 0)
+							r = KErrBadName;
+						else
+							{
+							_LIT(KSysBin,"?:\\sys\\bin\\*");
+							if (fnSupply->MatchF(KSysBin) == 0)
+								r = DeleteExecutable(*fnSupply);
+							else
+								r = gTheLoaderFs.Delete(*fnSupply);
+							}	
+						}
+					delete fnSupply;
+					}
+				}
+			} // endif !aMessage.HasCapability
+		
+#ifdef _DEBUG
+		gTheLoaderFs.ResourceCountMarkEnd();
+#endif
+		msg.Complete(r);
+		return;
+		}
+	
+	RLdrReq ldrReq;
+	ldrReq.iMsg=&msg;
+	r=msg.GetString(ldrReq.iFileName, 1, KMaxFileName, KExtensionLength, ETrue);
+	__IF_DEBUG(Printf("Filename: %S", ldrReq.iFileName));
+	if (r==KErrNone)
+		r = ldrReq.CheckForSubstDriveInName();
+	__IF_DEBUG(Printf("Post-subst filename: %S", ldrReq.iFileName));
+	if (r!=KErrNone)
+		goto error;
+
+	ldrReq.iPlatSecCaps = AllCapabilities; // secure default, require loaded executable to have all capabilities
+
+#ifndef __EPOC32__
+	// On the emulator, temporarily disable CPU speed restrictions whilst loading executables...
+	TInt cpu;
+	HAL::Get(HALData::ECPUSpeed, cpu);
+	HAL::Set(HALData::ECPUSpeed, 0);
+#endif
+	IF_DEBUG(SetupRFsFail(msg));
+	IF_DEBUG(SetupHeapFail(msg));
+	switch (mid)
+		{
+		//__DATA_CAGING__
+		case EGetInfo:
+			{
+			r=ldrReq.AddFileExtension(KFileExtensionDll);
+			if (r==KErrNone)
+				r=msg.GetLdrInfo(ldrReq);
+			if (r==KErrNone)
+				r=GetModuleInfo(ldrReq);
+			break;
+			}
+		//__DATA_CAGING__
+		case ELoadProcess:
+			{
+			r=ldrReq.AddFileExtension(KFileExtensionExe);
+			if (r==KErrNone)
+				r=msg.GetString(ldrReq.iCmd, 2, KMaxTInt, 0, EFalse);
+			if (r==KErrNone)
+				r=msg.GetLdrInfo(ldrReq);
+			if (r==KErrNone)
+				{
+				static const SCapabilitySet NoCapabilities={{0}};
+				ldrReq.iPlatSecCaps=NoCapabilities; // We don't care what EXEs capabilities are
+				r=LoadProcess(ldrReq);
+				}
+			break;
+			}
+		case ELoadLibrary:
+			{
+			r=E32Loader::CheckClientState(msg.Handle());
+			if (r!=KErrNone)
+				ldrReq.Panic(ELoadLibraryWithoutDllLock);
+			else
+				r=ldrReq.AddFileExtension(KFileExtensionDll);
+			if (r==KErrNone)
+				r=msg.GetString(ldrReq.iPath, 2, KMaxPath, 0, ETrue);
+			if (ldrReq.iPath)
+				{
+				__IF_DEBUG(Printf("Path: %S", ldrReq.iPath));
+				}
+			if (r==KErrNone)
+				r = ldrReq.CheckForSubstDrivesInPath();
+			if (ldrReq.iPath)
+				{
+				__IF_DEBUG(Printf("Post-subst Path: %S", ldrReq.iPath));
+				}
+			if (r==KErrNone)
+				r=msg.GetLdrInfo(ldrReq);
+			if (r==KErrNone)
+				r=LoadLibrary(ldrReq);
+			break;
+			}
+
+        case ECheckLibraryHash:
+
+           r = ldrReq.AddFileExtension(KFileExtensionDll);
+           if (r==KErrNone)
+            {
+            r = CheckLibraryHash(ldrReq);
+            }
+        break;
+
+		case ELoadLogicalDevice:
+			{
+			r=ldrReq.AddFileExtension(KFileExtensionLdd);
+			if (r==KErrNone)
+				r=LoadDeviceDriver(ldrReq, 0);
+			break;
+			}
+		case ELoadPhysicalDevice:
+			{
+			r=ldrReq.AddFileExtension(KFileExtensionPdd);
+			if (r==KErrNone)
+				r=LoadDeviceDriver(ldrReq, 1);
+			break;
+			}
+		case ELoadLocale:
+			{
+			r=ldrReq.AddFileExtension(KFileExtensionDll);
+			if (r==KErrNone)
+				{
+				ldrReq.iRequestedUids=TUidType(TUid::Uid(KDynamicLibraryUidValue),TUid::Uid(KLocaleDllUidValue));
+				ldrReq.iOwnerType=EOwnerProcess;
+				ldrReq.iHandle=0;
+				ldrReq.iPlatSecCaps=AllCapabilities;
+				ldrReq.iMsg=NULL;	// null msg -> client is self
+				TLibraryFunction functionList[KNumLocaleExports];
+				r=LoadLocale(ldrReq, functionList);
+				if(r==KErrNone)
+					{
+					TInt size = KNumLocaleExports * sizeof(TLibraryFunction);
+					TPtr8 functionListBuf((TUint8*)&functionList[0], size, size);
+					TRAP(r, aMessage.WriteL(2, functionListBuf, 0));
+					}
+				}
+			break;
+			}
+		case ELoadCodePage:
+			{
+            if (!KCapDiskAdmin.CheckPolicy(aMessage, __PLATSEC_DIAGNOSTIC_STRING("Loader : ELoadCodePage")))
+                {
+                r = KErrPermissionDenied;
+                break;
+                }
+			r=ldrReq.AddFileExtension(KFileExtensionDll);
+			if (r==KErrNone)
+				{
+				ldrReq.iRequestedUids=TUidType(TUid::Uid(KDynamicLibraryUidValue),TUid::Uid(KLocaleDllUidValue));
+				ldrReq.iOwnerType=EOwnerProcess;
+				ldrReq.iHandle=0;
+				ldrReq.iPlatSecCaps=gFileServerSecInfo.iCaps;
+				ldrReq.iMsg=NULL;	// null msg -> client is self
+				r=LoadLibrary(ldrReq);
+				if (r==KErrNone)
+					{
+					// call file server to install code page dll
+					r = ((RLoaderFs*)&gTheLoaderFs)->SendReceive(EFsLoadCodePage, TIpcArgs(ldrReq.iHandle));
+					}
+				}
+			if (r!=KErrNone)
+				{
+				RLibrary lib;
+				lib.SetHandle(ldrReq.iHandle);
+				lib.Close();
+				}
+			break;
+			}
+		case ELoadFileSystem:
+			{
+            if (!KCapFsAddFileSystem.CheckPolicy(aMessage, __PLATSEC_DIAGNOSTIC_STRING("Add File System")))
+                {
+                r = KErrPermissionDenied;
+                break;
+                }
+			r=ldrReq.AddFileExtension(KFileExtensionFsy);
+			if (r==KErrNone)
+				{
+				ldrReq.iRequestedUids=TUidType(TUid::Uid(KDynamicLibraryUidValue),TUid::Uid(KFileSystemUidValue));
+				ldrReq.iOwnerType=EOwnerProcess;
+				ldrReq.iHandle=0;
+				ldrReq.iPlatSecCaps=gFileServerSecInfo.iCaps;
+				ldrReq.iMsg=NULL;	// null msg -> client is self
+				r=LoadLibrary(ldrReq);
+				if (r==KErrNone)
+					{
+					// call file server to install file system
+					r = ((RLoaderFs*)&gTheLoaderFs)->SendReceive(EFsAddFileSystem, TIpcArgs(ldrReq.iHandle));
+					}
+				}
+			if (r!=KErrNone)
+				{
+				RLibrary lib;
+				lib.SetHandle(ldrReq.iHandle);
+				lib.Close();
+				}
+			break;
+			}
+		case ELoadFSExtension:
+			{
+            if (!KCapFsAddExtension.CheckPolicy(aMessage, __PLATSEC_DIAGNOSTIC_STRING("Add File Extension")))
+                {
+                r = KErrPermissionDenied;
+                break;
+                }
+			r=ldrReq.AddFileExtension(KFileExtensionFxt);
+			if (r==KErrNone)
+				{
+				ldrReq.iRequestedUids=TUidType(TUid::Uid(KDynamicLibraryUidValue),TUid::Uid(KFileSystemUidValue));
+				ldrReq.iOwnerType=EOwnerProcess;
+				ldrReq.iHandle=0;
+				ldrReq.iPlatSecCaps=gFileServerSecInfo.iCaps;
+				ldrReq.iMsg=NULL;	// null msg -> client is self
+				r=LoadLibrary(ldrReq);
+				if (r==KErrNone)
+					{
+					// call file server to install file system
+					r = ((RLoaderFs*)&gTheLoaderFs)->SendReceive(EFsAddExtension, TIpcArgs(ldrReq.iHandle));
+					}
+				}
+			if (r!=KErrNone)
+				{
+				RLibrary lib;
+				lib.SetHandle(ldrReq.iHandle);
+				lib.Close();
+				}
+			break;
+			}
+		case ELoadFSProxyDrive:
+			{
+            if (!KCapFsAddProxyDrive.CheckPolicy(aMessage, __PLATSEC_DIAGNOSTIC_STRING("Add Proxy Drive")))
+                {
+                r = KErrPermissionDenied;
+                break;
+                }
+			r=ldrReq.AddFileExtension(KFileExtensionPxy);
+			if (r==KErrNone)
+				{
+				ldrReq.iRequestedUids=TUidType(TUid::Uid(KDynamicLibraryUidValue),TUid::Uid(KFileSystemUidValue));
+				ldrReq.iOwnerType=EOwnerProcess;
+				ldrReq.iHandle=0;
+				ldrReq.iPlatSecCaps=gFileServerSecInfo.iCaps;
+				ldrReq.iMsg=NULL;	// null msg -> client is self
+				r=LoadLibrary(ldrReq);
+				if (r==KErrNone)
+					{
+					// call file server to install file system
+					r = ((RLoaderFs*)&gTheLoaderFs)->SendReceive(EFsAddProxyDrive, TIpcArgs(ldrReq.iHandle));
+					}
+				}
+			if (r!=KErrNone)
+				{
+				RLibrary lib;
+				lib.SetHandle(ldrReq.iHandle);
+				lib.Close();
+				}
+			break;
+			}
+		case ELoadFSPlugin:
+			{
+			r=ldrReq.AddFileExtension(KFileExtensionPxt);
+			if (r==KErrNone)
+				{
+				ldrReq.iRequestedUids=TUidType(TUid::Uid(KDynamicLibraryUidValue),TUid::Uid(KFileSystemUidValue));
+				ldrReq.iOwnerType=EOwnerProcess;
+				ldrReq.iHandle=0;
+				ldrReq.iPlatSecCaps=gFileServerSecInfo.iCaps;
+				ldrReq.iMsg=NULL;	// null msg -> client is self
+				r=LoadLibrary(ldrReq);
+				if (r==KErrNone)
+					{
+					// call file server to install file system
+					r = ((RLoaderFs*)&gTheLoaderFs)->SendReceive(EFsAddPlugin, TIpcArgs(ldrReq.iHandle));
+					}
+				}
+			if (r!=KErrNone)
+				{
+				RLibrary lib;
+				lib.SetHandle(ldrReq.iHandle);
+				lib.Close();
+				}
+			break;
+			}
+		
+		default:
+			r=KErrNotSupported;
+			break;
+		}
+	
+	ldrReq.Close();
+	IF_DEBUG(EndRFsFailCheck(r));
+	IF_DEBUG(EndHeapFailCheck(r));
+#ifndef __EPOC32__
+	HAL::Set(HALData::ECPUSpeed, cpu);
+#endif
+error:
+#ifdef _DEBUG
+	gTheLoaderFs.ResourceCountMarkEnd();
+#endif
+	if (!aMessage.IsNull())
+		{
+		__IF_DEBUG(Printf("Loader: msg complete %d", r));
+		aMessage.Complete(r);
+		}
+	}
+
+//-----------------------------------------------------------------------------------
+#ifndef __WINS__
+/**
+    Helper function that reads a hash file from c:\\sys\\hash and compares it with the givem dll hash.
+
+    @param  aHashFile     represents opened hash file in c:\\sys\\hash directory
+    @param  aDllFileName  full path to the dll file, which hash will be calculated and compared with aHashFile contents.
+    @leave  on file operation error or if hashes differ.
+*/
+static void DoCheckHashL(RFile& aHashFile, const TDesC& aDllFileName)
+    {
+	TBuf8<SHA1_HASH> hashInstalled; //-- installed dll hash, from c:\\sys\\hash
+	User::LeaveIfError(aHashFile.Read(hashInstalled));
+
+	CSHA1* hasher=CSHA1::NewL();
+	CleanupStack::PushL(hasher);
+
+    RFile fileDll;
+    CleanupClosePushL(fileDll);
+
+    //-- open dll file
+    User::LeaveIfError(fileDll.Open(gTheLoaderFs, aDllFileName, EFileRead|EFileReadDirectIO));
+
+    TInt fileSz;
+	User::LeaveIfError(fileDll.Size(fileSz));
+
+    //-- check if the file is on removable media
+    TInt drvNum;
+    TDriveInfo drvInfo;
+    User::LeaveIfError(fileDll.Drive(drvNum, drvInfo));
+    if(!(drvInfo.iDriveAtt & KDriveAttRemovable))
+        User::Leave(KErrNotSupported);
+
+    TInt    offset=0;
+    TInt    readSize = KHashFileReadSize;
+    RBuf8   readBuf;
+
+    CleanupClosePushL(readBuf);
+    readBuf.CreateMaxL(readSize);
+
+    //-- calculate dll hash
+    do	{
+		if((fileSz - offset) < readSize)
+			readSize = (fileSz - offset);
+
+		User::LeaveIfError(fileDll.Read(offset, readBuf, readSize));
+		hasher->Update(readBuf);
+		offset+=readSize;
+		}
+	while(offset < fileSz);
+
+    TBuf8<SHA1_HASH> hashCalculated; //-- calculated dll hash
+	hashCalculated=hasher->Final();
+
+    //-- compare hashes
+    if(hashCalculated.Compare(hashInstalled) !=0)
+        User::Leave(KErrCorrupt);
+
+    CleanupStack::PopAndDestroy(3); //hasher, fileDll, readBuf
+    }
+#endif //__WINS__
+
+//-----------------------------------------------------------------------------------
+
+/**
+    Check if specified dll hash exists in \\sys\\hash on system drive and optionally validate it.
+
+
+    @param  aReq loader request parameters
+
+    @return System-wide error code, see RLoader::CheckLibraryHash() description
+    @return KErrNotSupported for the emulator version, because loading dlls from the emulated removable media is not supported
+*/
+static TInt CheckLibraryHash(RLdrReq& aReq)
+    {
+#ifdef __WINS__
+    (void)aReq;
+    return KErrNotSupported; //-- loading dlls from removable media and dll hashing isn't supported for WINS
+#else
+
+    const TInt fNameLen=aReq.iFileName->Length();
+    if(fNameLen <= 0 || fNameLen > KMaxFileName)
+        return KErrArgument;
+
+    const TBool bValidateHash=aReq.iMsg->Int2();
+
+    //-- extract pure dll name
+    TInt posNameStart=aReq.iFileName->LocateReverse('\\');
+    if(posNameStart <0)
+        posNameStart = 0;
+    else
+        posNameStart++;
+
+    //-- compose hash file name \\sys\\hash\\xxx on system drive
+    TFileName hashFName;
+    hashFName.Copy(aReq.iFileName->Right(fNameLen-posNameStart));
+    hashFName.Insert(0, KSysHash);
+    hashFName[0] = (TUint8) RFs::GetSystemDriveChar();
+
+    //-- try to locate hash file
+    TInt nRes=KErrNone;
+    RFile fileHash;
+	nRes = fileHash.Open(gTheLoaderFs, hashFName, EFileRead|EFileReadDirectIO);
+
+    if(nRes != KErrNone)
+        {
+        nRes = KErrNotFound; //-- hash file couldn't be found
+        }
+    else if(bValidateHash)
+        {//-- request to validate the hash.
+        hashFName.Copy(aReq.iFileName->Left(fNameLen)); //-- expand file name to unicode
+        TRAP(nRes, DoCheckHashL(fileHash, hashFName));
+
+        if(nRes != KErrNone)
+            nRes=KErrCorrupt;
+        }
+
+    fileHash.Close();
+
+    return nRes;
+
+#endif //__WINS__
+    }
+
+// This safely deletes something that could be an executable (ie in /sys/bin)
+// aName will be deleted either in, or sometime after this call
+// (The descriptor and the file it represents)
+TInt CSessionLoader::DeleteExecutable(const TDesC& aName)
+	{
+	__IF_DEBUG(Printf("DeleteExecutable %S", &aName));
+	TInt r;
+	r = gTheLoaderFs.Delete(aName);
+	if (r!=KErrInUse)
+		{
+		return r;
+		}
+	RFile toDelete;
+	CReaperCleanupTimer::Complete();
+
+	HBufC* newName=NULL;
+	r = toDelete.Open(gTheLoaderFs,aName,EFileShareExclusive|EFileReadDirectIO);
+	if (r==KErrNone)
+		{
+		TInt64 startPos=0;
+		SBlockMapInfo blockmapInfo;
+								
+		// find drive number, and starting block
+		r = toDelete.BlockMap(blockmapInfo,startPos, 1, ETrue);
+		if (r == KErrCompletion)
+			{
+			TInt64 startBlock = blockmapInfo.iStartBlockAddress +
+								((TBlockMapEntry *)(&(blockmapInfo.iMap[0])))->iStartBlock *
+								blockmapInfo.iBlockGranularity +
+								blockmapInfo.iBlockStartOffset;
+			TInt driveNumber = blockmapInfo.iLocalDriveNumber;
+
+			newName = HBufC::New(KPathDelLength+2+16); // + 2 digits for drive and 16 for start block block
+			if(!newName)
+				r = KErrNoMemory;
+			else
+				{
+				// make unique name for file...
+				TPtr name = newName->Des();
+				name.Copy(KPathDel);
+				name[0] = aName[0]; // copy drive letter
+				name.AppendNumFixedWidth(driveNumber, EHex, 2);
+				name.AppendNumFixedWidth(TUint32(startBlock>>32), EHex, 8);
+				name.AppendNumFixedWidth(TUint32(startBlock), EHex, 8);
+
+				TLoaderDeletedList* tmpLink = new TLoaderDeletedList();
+				if(tmpLink==NULL)
+					r = KErrNoMemory;
+				else
+					{
+					toDelete.Close();
+					gTheLoaderFs.MkDirAll(*newName); // ignore error and let rename fail if path doesn't exists
+					r = gTheLoaderFs.Rename(aName, *newName);
+					__IF_DEBUG(Printf("DeleteExecutable rename to %S returns %d", &newName, r));
+					if(r==KErrNone)
+						{
+						// add to pending deletion list		
+						tmpLink->iStartBlock = startBlock;
+						tmpLink->iDriveNumber = driveNumber;
+						tmpLink->iFileName = newName;
+						gActiveReaper->AddDeleted(tmpLink);
+						return r;					
+						} //endif rename
+					delete tmpLink;
+					} // alloc
+				delete newName;
+				} // alloc name
+			} //endif blockmap
+		else if (r == KErrNotSupported)	
+			r = KErrInUse;
+		else if (r == KErrNone)
+			r = KErrGeneral; 
+		toDelete.Close();	
+		} // endif open						
+	return r;
+	}
+
+
+GLDEF_C TInt LoadProcess(RLdrReq& aReq)
+	{
+	__LDRTRACE(aReq.Dump("LoadProcess:"));
+	TInt32* uid=(TInt32*)&aReq.iRequestedUids;
+	if (uid[0] && uid[0]!=KExecutableImageUidValue)
+		return KErrNotSupported;
+	uid[0]=KExecutableImageUidValue;
+	gExeCodeSeg=NULL;	// new process doesn't load into another process
+	gExeAttr=0;
+	E32Image* e=new E32Image;
+	if (!e)
+		return KErrNoMemory;
+	e->iMain=e;
+	TInt r=e->LoadProcess(aReq);
+	if (r==KErrNone)
+		{
+		aReq.iHandle=e->iFinalHandle;
+		r=aReq.iMsg->UpdateLdrInfo(aReq);
+		if (r!=KErrNone)
+			aReq.Panic(KErrBadDescriptor);
+		}
+	if (r!=KErrNone && e->iProcessHandle)
+		{
+		RProcess p;
+		p.SetHandle(e->iProcessHandle);
+		p.Kill(0);
+		}
+	delete e;
+	return r;
+	}
+
+
+
+TInt LoadLibrary(RLdrReq& aReq)
+	{
+	__LDRTRACE(aReq.Dump("LoadLibrary:"));
+	TInt32* uid=(TInt32*)&aReq.iRequestedUids;
+	if (uid[0] && uid[0]!=KDynamicLibraryUidValue)
+		return KErrNotSupported;
+	uid[0]=KDynamicLibraryUidValue;
+	TInt r=KErrNone;
+	if (aReq.iMsg)
+		{
+		r = aReq.iMsg->Client(aReq.iClientThread);
+		if (r==KErrNone)
+			r = aReq.iClientThread.Process(aReq.iClientProcess);
+		if (r!=KErrNone)
+			{
+			return r;
+			}
+		}
+	else
+		{
+		aReq.iClientThread.SetHandle(KCurrentThreadHandle);
+		aReq.iClientProcess.SetHandle(KCurrentProcessHandle);
+		}
+	E32Loader::CodeSegDeferDeletes();
+	gExeCodeSeg=E32Loader::ThreadProcessCodeSeg(aReq.iClientThread.Handle());
+	SSecurityInfo si;
+	gExeAttr=GetCodeSegAttr(gExeCodeSeg, &si, NULL);
+	aReq.iPlatSecCaps=si.iCaps;
+	E32Loader::CodeSegEndDeferDeletes();
+	E32Image* e=new E32Image;
+	if (!e)
+		return KErrNoMemory;
+	e->iMain=e;
+	e->iClientProcessHandle=aReq.iClientProcess.Handle();
+	__IF_DEBUG(Printf("e->iClientProcessHandle = %08x", e->iClientProcessHandle));
+	if (r==KErrNone)
+		r=e->LoadCodeSeg(aReq);
+	if (r==KErrNone)
+		{
+		TLibraryCreateInfo libInfo;
+		libInfo.iCodeSegHandle=e->iHandle;
+		libInfo.iClientHandle=aReq.iClientThread.Handle();
+		libInfo.iLibraryHandle=0;
+		libInfo.iOwnerType=aReq.iOwnerType;
+		r=E32Loader::LibraryCreate(libInfo);
+		if (r==KErrNone)
+			{
+			aReq.iHandle=libInfo.iLibraryHandle;
+			if (aReq.iMsg)
+				{
+				r=aReq.iMsg->UpdateLdrInfo(aReq);
+				if (r!=KErrNone)
+					aReq.Panic(KErrBadDescriptor);
+				}
+			}
+		}
+	delete e;
+	return r;
+	}
+	
+struct TFatUtilityFunctions;
+
+GLDEF_C TInt LoadLocale(RLdrReq& aReq, TLibraryFunction* aExportsList)
+	{
+	__LDRTRACE(aReq.Dump("LoadLocale:"));
+	TUint32* uid=(TUint32*)&aReq.iRequestedUids;
+	uid[2]=0;
+	gExeCodeSeg=NULL;
+	gExeAttr = gFileServerAttr;
+	E32Image* e=new E32Image;
+	if (!e)
+		return KErrNoMemory;
+	e->iMain=e;
+	e->iAttr=ECodeSegAttGlobal;
+	TInt r=e->LoadCodeSeg(aReq);
+	if (r==KErrNone)
+		{
+		r = E32Loader::LocaleExports(e->iHandle, aExportsList);
+#ifdef SYMBIAN_DISTINCT_LOCALE_MODEL
+		_LIT8(KLocLan, "elocl_lan");
+		_LIT8(KLoc, "elocl.");
+        if(aReq.iFileName->Find(KLocLan) != KErrNotFound)
+            {
+			TheCodePage.SetLocaleCodePage((TFatUtilityFunctions*)aExportsList[FnFatUtilityFunctionsV2]());
+            }		
+        if(aReq.iFileName->Find(KLoc) != KErrNotFound)
+            {
+			TheCodePage.SetLocaleCodePage((TFatUtilityFunctions*)aExportsList[FnFatUtilityFunctions]());
+            }				
+#else
+		// The 'old' version of the locale DLL contained a set of code page conversion exports.
+		// This has now been superceeded by the use of a seperate code page DLL.
+		//  - To ease migration both are currently supported.
+		//  - If both locale and CP DLL functions are present, CP DLL's will take precedence
+		//  - This functionality will eventually be deprecated.
+		TheCodePage.SetLocaleCodePage((TFatUtilityFunctions*)aExportsList[FnFatUtilityFunctions]());
+#endif
+		}
+	delete e;
+	return r;
+	}
+
+TInt LoadDeviceDriver(RLdrReq& aReq, TInt aDeviceType)
+	{
+	__IF_DEBUG(Printf("LoadDeviceDriver type %d", aDeviceType));
+	__LDRTRACE(aReq.Dump(""));
+	TUint32* uid=(TUint32*)&aReq.iRequestedUids;
+	uid[0]=KDynamicLibraryUidValue;
+	uid[1]=aDeviceType ? KPhysicalDeviceDriverUidValue : KLogicalDeviceDriverUidValue;
+	uid[2]=0;
+	gExeCodeSeg=gKernelCodeSeg;
+	gExeAttr=gKernelAttr;
+	E32Image* e=new E32Image;
+	if (!e)
+		return KErrNoMemory;
+	e->iMain=e;
+	e->iAttr=ECodeSegAttKernel;
+	aReq.iOwnerType=EOwnerProcess;
+	aReq.iHandle=0;
+	aReq.iPlatSecCaps=gKernelSecInfo.iCaps;
+	TInt r=e->LoadCodeSeg(aReq);
+	if (r==KErrNone)
+		r=E32Loader::DeviceLoad(e->iHandle, aDeviceType);
+	delete e;
+	return r;
+	}
+
+CServerLoader* CServerLoader::New()
+//
+// Create a new CServerLoader.
+//
+	{
+	CServerLoader* pS=new CServerLoader(EPriorityNormal);
+	if (pS==NULL)
+		return(NULL);
+	_LIT(KLoaderServerName,"!Loader");
+	TInt r=pS->Start(KLoaderServerName);
+	if (r!=KErrNone)
+		return(NULL);
+	return(pS);
+	}
+
+CServerLoader::CServerLoader(TInt aPriority)
+//
+// Constructor.
+//
+	: CServer2(aPriority)
+	{
+	}
+
+CSession2* CServerLoader::NewSessionL(const TVersion& aVersion, const RMessage2&) const
+//
+// Create a new client for this server.
+//
+	{
+
+	TVersion v(KLoaderMajorVersionNumber,KLoaderMinorVersionNumber,KF32BuildVersionNumber);
+	TBool r=User::QueryVersionSupported(v,aVersion);
+	if (!r)
+		User::Leave(KErrNotSupported);
+	return new (ELeave) CSessionLoader;
+	}
+
+TInt CServerLoader::RunError(TInt aError)
+//
+// Complete the request with the error code
+//
+	{
+	Message().Complete(aError);
+	ReStart();
+	return KErrNone;
+	}
+
+CActiveSchedulerLoader* CActiveSchedulerLoader::New()
+//
+// Create and install the active scheduler.
+//
+	{
+
+	CActiveSchedulerLoader* pA=new CActiveSchedulerLoader;
+	if (pA==NULL)
+		return(NULL);
+	CActiveScheduler::Install(pA);
+	return(pA);
+	}
+
+void CActiveSchedulerLoader::Error(TInt anError) const
+//
+// Called if any Run() method leaves.
+//
+	{
+	_LIT(KPanicLoaderErr, "LOADER-ERR");
+	User::Panic(KPanicLoaderErr,anError);
+	}
+
+/******************************************************************************
+ * E32Image functions common to WINS and EPOC
+ ******************************************************************************/
+
+TInt CheckUids(const TUidType& aUids, const TUidType& aRequestedUids)
+	{
+	const TUint32* uid=(const TUint32*)&aUids;
+	const TUint32* req=(const TUint32*)&aRequestedUids;
+	__IF_DEBUG(Printf("CheckUids %08x,%08x,%08x req %08x,%08x,%08x",	uid[0],uid[1],uid[2],
+																		req[0],req[1],req[2]));
+	return (CheckUid(uid[0],req[0]) && CheckUid(uid[1],req[1]) && CheckUid(uid[2],req[2]))
+			? KErrNone : KErrNotSupported;
+	}
+
+E32Image::E32Image()
+	{
+	__IF_DEBUG(Printf("E32Image Constructor"));
+	Mem::FillZ(&iUids, sizeof(E32Image)-sizeof(iFileName));
+	}
+
+E32Image::~E32Image()
+	{
+
+	__IF_DEBUG(Printf("E32Image Destructor"));
+	Reset();
+	}
+
+void E32Image::Reset()
+	{
+	__IF_DEBUG(Printf("E32Image::Reset"));
+	delete iHeader;
+	__IF_DEBUG(Printf("iHeader"));
+
+	// demand paging fixup data
+	User::Free(iImportFixupTable);
+	__IF_DEBUG(Printf("iImportFixupTable"));
+
+	// demand paging file data
+	__IF_DEBUG(Printf("iCodePageOffsets"));
+	delete[] iCodePageOffsets;
+	__IF_DEBUG(Printf("iCodeBlockMapEntries"));
+	User::Free(iCodeBlockMapEntries);
+
+	__IF_DEBUG(Printf("iCodeRelocSection"));
+	User::Free(iCodeRelocTable);
+	__IF_DEBUG(Printf("iDataRelocSection"));
+	User::Free(iRestOfFileData);
+	__IF_DEBUG(Printf("iRestOfFileData"));
+	User::Free(iCurrentImportList);
+	__IF_DEBUG(Printf("iCurrentImportList"));
+	User::Free(iFixups);
+	__IF_DEBUG(Printf("iFixups"));
+	gFileDataAllocator.Free(iFileData);
+	iFileData = NULL;
+	__IF_DEBUG(Printf("iFileData"));
+	iFile.Close();
+	__IF_DEBUG(Printf("iFile"));
+	User::Free(iCopyOfExportDir);
+	if (iProcessHandle)
+		{
+		RProcess p;
+		p.SetHandle(iProcessHandle);
+		p.Close();
+		__IF_DEBUG(Printf("iProcessHandle"));
+		}
+	if (iCloseCodeSeg)
+		E32Loader::CodeSegClose(iCloseCodeSeg);
+	if (iMain==this)
+		E32Loader::CodeSegClose(NULL);
+
+	// Unclamp file if load failed.  Cannot handle error from RFs here.
+	__IF_DEBUG(Printf("iFileClamp,%ld,%ld", iFileClamp.iCookie[0], iFileClamp.iCookie[1]));
+	iFileClamp.Close(gTheLoaderFs);
+
+	__IF_DEBUG(Printf("Reset done"));
+	}
+
+
+TInt E32Image::OpenFile()
+	{
+	TBuf8<KMaxFileName*sizeof(TText)> fnb;
+	if (iAttr & ECodeSegAttExpVer)
+		{
+		TFileNameInfo fi;
+		fi.Set(iFileName, 0);
+		fi.iVersion = iModuleVersion;
+		fi.GetName(fnb, TFileNameInfo::EIncludeDrivePathBaseExt|TFileNameInfo::EForceVer);
+		}
+	else
+		fnb = iFileName;
+	TPtr16 fn(fnb.Expand());
+	__IF_DEBUG(Print(_L(">E32Image::OpenFile %S"),&fn));
+	TInt r = iFile.Open(gTheLoaderFs, fn, EFileStream|EFileRead|EFileShareReadersOnly|EFileReadDirectIO);
+	__IF_DEBUG(Printf("<E32Image::OpenFile %d", r));
+	return r;
+	}
+
+
+/**
+Check if this executable is already loaded. If it is, set iAlreadyLoaded true and
+iHandle to an newly opened reference on the CodeSeg. Also set iExportDirLoad if the
+export directory of the executable is directly visible to the Loader.
+*/
+TInt E32Image::CheckAlreadyLoaded()
+	{
+	__IF_DEBUG(Printf(">E32Image::CheckAlreadyLoaded %S", &iFileName));
+	__IF_DEBUG(Printf("UIDs %08x,%08x,%08x",iUids[0],iUids[1],iUids[2]));
+	__IF_DEBUG(Printf("VER %08x",iModuleVersion));
+	__IF_DEBUG(Printf("CAPS %08x %08x SID %08x", iS.iSecureId, iS.iCaps[1], iS.iCaps[0]));
+	__IF_DEBUG(Printf("Client process handle %08x",iClientProcessHandle));
+
+	TFindCodeSeg find;
+	find.iUids = iUids;
+	find.iRomImgHdr = NULL;
+#ifndef __WINS__
+	// Make sure we check the code segment attributes (kernel or global)
+	// as part of the decision as to whether we are loaded or not.
+	find.iAttrMask = (ECodeSegAttKernel|ECodeSegAttGlobal);
+	find.iAttrVal = iAttr&(ECodeSegAttKernel|ECodeSegAttGlobal);
+#else	
+	// On the emulator, all DLLs are loaded into the same process, so we
+	// don't distinguish between instances of the same DLL loaded with
+	// different code segment attributes.
+	find.iAttrMask = 0;
+	find.iAttrVal = 0;
+#endif
+	find.iProcess = iClientProcessHandle;
+	find.iS = iS;
+	find.iModuleVersion = iModuleVersion;
+	find.iName = RootName();
+	__IF_DEBUG(Printf("Required root name %S", &find.iName));
+
+	E32Loader::CodeSegDeferDeletes();
+	iHandle = NULL;
+	TAny* h = NULL;
+	TInt r = KErrNone;
+	E32Loader::CodeSegNext(h, find);
+	if(h)
+		{
+		// found...
+		iHandle = h;
+		__IF_DEBUG(Printf("Client process handle %08x",iClientProcessHandle));
+		E32Loader::CodeSegInfo(h, *this);
+		__IF_DEBUG(Printf("Client process handle %08x",iClientProcessHandle));
+		r = E32Loader::CodeSegOpen(h, iClientProcessHandle);
+		}
+	E32Loader::CodeSegEndDeferDeletes();
+
+	if(iHandle && r==KErrNone)
+		{
+		iAlreadyLoaded = ETrue;
+		TUint32 attrMask = (gExecutesInSupervisorMode)?
+			// The loader reads export directories in kernel mode so it can access 
+			// kernel code export directories and global export directories.
+			ECodeSegAttKernel | ECodeSegAttGlobal :
+			// The loader reads export directories in user mode so it can't access 
+			// kernel code export directories but can access global export directories.
+			ECodeSegAttGlobal;
+			
+		if(iAttr & attrMask)
+			{// The export directory is visible to loader so set iExportDirLoad to prevent
+			// the loader from invoking E32Loader::ReadExportDir() to copy the kernel's copy
+			// of the export directory to the loader's heap.
+			iExportDirLoad = iExportDir;
+			}
+		}
+
+	__IF_DEBUG(Printf("<E32Image::CheckAlreadyLoaded %08x, %d",iHandle,r));
+	return r;
+	}
+
+TInt E32Image::Order(const E32Image& aL, const E32Image& aR)
+	{
+	return aL.RootName().CompareF(aR.RootName());
+	}
+
+/******************************************************************************
+ * Loader debug code
+ ******************************************************************************/
+
+#ifdef _DEBUG
+TInt DoLoaderDebugFunction(const RMessage2& aMsg)
+	{
+	TInt f=aMsg.Int0();
+	__IF_DEBUG(Printf("LdrDbg: %d,%d,%d,%d",f,aMsg.Int1(),aMsg.Int2(),aMsg.Int3()));
+	switch(f)
+		{
+	case ELoaderDebug_SetHeapFail:
+		KernHeapFailCount=aMsg.Int2();
+		LdrHeapFailCount=aMsg.Int1();
+		return KErrNone;
+	case ELoaderDebug_SetRFsFail:
+		RFsErrorCode = aMsg.Int1();
+		RFsFailCount = aMsg.Int2();
+		return KErrNone;
+	default:
+		return KErrNotSupported;
+		}
+	}
+#endif
+
+#ifdef _DEBUG
+void SetupHeapFail(const RMessage2& /*aMsg*/)
+	{
+	__IF_DEBUG(Printf("SetupHeapFail: %d,%d",LdrHeapFailCount,KernHeapFailCount));
+	if (KernHeapFailCount>0)
+		{
+		__KHEAP_SETFAIL(RHeap::EFailNext, KernHeapFailCount);
+		__KHEAP_MARK;
+		HeapFailActive|=1;
+		}
+	if (LdrHeapFailCount>0)
+		{
+		__UHEAP_SETFAIL(RHeap::EFailNext, LdrHeapFailCount);
+		__UHEAP_MARK;
+		HeapFailActive|=2;
+		}
+	ProcessCreated = EFalse;
+	ProcessDestructStat = KRequestPending;
+	ProcessDestructStatPtr = &ProcessDestructStat;
+	}
+
+void EndHeapFailCheck(TInt aError)
+	{
+	__IF_DEBUG(Printf("EndHeapFail: %d",aError));
+	if (aError==KErrNone && ProcessCreated)
+		{
+		User::CancelMiscNotifier(ProcessDestructStat);
+		User::WaitForRequest(ProcessDestructStat);
+		}
+	if (aError!=KErrNone)
+		{
+		if (ProcessCreated)
+			// wait for any partially created process to die
+			User::WaitForRequest(ProcessDestructStat);
+
+		// wait for reaper to run
+		TInt rr;
+		if (CActiveScheduler::RunIfReady(rr,KPriorityVeryHigh))
+			User::WaitForAnyRequest();
+
+		// wait for any async cleanup in the supervisor to finish
+		UserSvr::HalFunction(EHalGroupKernel, EKernelHalSupervisorBarrier, 0, 0);
+
+		if (HeapFailActive&1)
+			{
+			__KHEAP_MARKEND;
+			}
+		if (HeapFailActive&2)
+			{
+			__UHEAP_MARKEND;
+			}
+		}
+	if (HeapFailActive & 3)
+		{
+		__KHEAP_TOTAL_RESET;
+		__UHEAP_TOTAL_RESET;
+		}
+	HeapFailActive=0;
+	ProcessDestructStatPtr = 0;
+	ProcessCreated = EFalse;
+	}
+
+void SetupRFsFail(const RMessage2& /*aMsg*/)
+	{
+	__IF_DEBUG(Printf("SetupRFsFail: %d,%d", RFsErrorCode, RFsFailCount));
+	if (RFsErrorCode!=KErrNone && RFsFailCount>0)
+		{
+		gTheLoaderFs.SetErrorCondition(RFsErrorCode, RFsFailCount);
+		RFsFailActive = ETrue;
+		}
+	}
+
+void EndRFsFailCheck(TInt /*aError*/)
+	{
+	if (RFsFailActive)
+		{
+		gTheLoaderFs.SetErrorCondition(KErrNone);
+		RFsFailActive = EFalse;
+		}
+	}
+
+#endif
+
+#if defined(_DEBUG) || defined(_DEBUG_RELEASE)
+void RLdrReq::Dump(const char* aTitle) const
+	{
+	RDebug::Printf(aTitle);
+	if (iFileName)
+		RDebug::Printf("iFileName=%S", iFileName);
+	if (iPath)
+		RDebug::Printf("iPath=%S", iPath);
+	RDebug::Printf("SID %08x Caps %08x %08x", iSecureId, iPlatSecCaps[1], iPlatSecCaps[0]);
+	const TUint32* uid = (const TUint32*)&iRequestedUids;
+	RDebug::Printf("REQ UIDs %08x %08x %08x REQ VER %08x", uid[0], uid[1], uid[2], iRequestedVersion);
+	iFileNameInfo.Dump();
+	}
+
+void TFileNameInfo::Dump() const
+	{
+	const TDesC8& d = Drive();
+	const TDesC8& p = Path();
+	const TDesC8& b = Base();
+	const TDesC8& v = VerStr();
+	const TDesC8& u = UidStr();
+	const TDesC8& e = Ext();
+	RDebug::Printf("D=%S P=%S B=%S V=%S U=%S E=%S", &d, &p, &b, &v, &u, &e);
+	}
+#endif
+
+#ifdef __TRACE_LOADER_HEAP__
+
+class RTraceHeap : public RAllocator
+	{
+public:
+	virtual TAny* Alloc(TInt aSize);
+	virtual void Free(TAny* aPtr);
+	virtual TAny* ReAlloc(TAny* aPtr, TInt aSize, TInt aMode=0);
+	virtual TInt AllocLen(const TAny* aCell) const;
+	virtual TInt Compress();
+	virtual void Reset();
+	virtual TInt AllocSize(TInt& aTotalAllocSize) const;
+	virtual TInt Available(TInt& aBiggestBlock) const;
+	virtual TInt DebugFunction(TInt aFunc, TAny* a1=NULL, TAny* a2=NULL);
+public:
+	RAllocator* iA;
+	};
+
+void InstallHeapTracer()
+	{
+	RTraceHeap* p = new RTraceHeap;
+	__ASSERT_ALWAYS(p!=NULL, User::Invariant());
+	p->iA = &User::Heap();
+	User::SwitchHeap(p);
+	}
+
+TAny* RTraceHeap::Alloc(TInt aSize)
+	{
+	RDebug::Printf("TH:Alloc(%08x)", aSize);
+	TAny* p = iA->Alloc(aSize);
+	RDebug::Printf("TH:returns %08x", p);
+	return p;
+	}
+
+void RTraceHeap::Free(TAny* aPtr)
+	{
+	RDebug::Printf("TH:Free(%08x)", aPtr);
+	iA->Free(aPtr);
+	}
+
+TAny* RTraceHeap::ReAlloc(TAny* aPtr, TInt aSize, TInt aMode=0)
+	{
+	RDebug::Printf("TH:ReAlloc(%08x,%08x,%x)", aPtr, aSize, aMode);
+	TAny* p = iA->ReAlloc(aPtr,aSize,aMode);
+	RDebug::Printf("TH:returns %08x", p);
+	return p;
+	}
+
+TInt RTraceHeap::AllocLen(const TAny* aCell) const
+	{
+	RDebug::Printf("TH:AllocLen(%08x)", aCell);
+	TInt l = iA->AllocLen(aCell);
+	RDebug::Printf("TH:returns %08x", l);
+	return l;
+	}
+
+TInt RTraceHeap::Compress()
+	{
+	RDebug::Printf("TH:Compress()");
+	TInt l = iA->Compress();
+	RDebug::Printf("TH:returns %08x", l);
+	return l;
+	}
+
+void RTraceHeap::Reset()
+	{
+	RDebug::Printf("TH:Reset()");
+	iA->Reset();
+	}
+
+TInt RTraceHeap::AllocSize(TInt& aTotalAllocSize) const
+	{
+	RDebug::Printf("TH:AllocSize()");
+	TInt s;
+	TInt r = iA->AllocSize(s);
+	RDebug::Printf("TH:returns %08x(%08x)", r, s);
+	aTotalAllocSize = s;
+	return r;
+	}
+
+TInt RTraceHeap::Available(TInt& aBiggestBlock) const
+	{
+	RDebug::Printf("TH:Available()");
+	TInt s;
+	TInt r = iA->Available(s);
+	RDebug::Printf("TH:returns %08x(%08x)", r, s);
+	aBiggestBlock = s;
+	return r;
+	}
+
+TInt RTraceHeap::DebugFunction(TInt aFunc, TAny* a1=NULL, TAny* a2=NULL)
+	{
+	RDebug::Printf("TH:DebugFunction(%d,%08x,%08x)", aFunc, a1, a2);
+	TInt r = iA->DebugFunction(aFunc, a1, a2);
+	RDebug::Printf("TH:returns %08x", r);
+	return r;
+	}
+
+#endif
+
+/* The Reaper - Used to delete binarys in /sys/del/ after they are no longer needed by demand paging */ 
+
+CActiveReaper::CActiveReaper()
+	: CActive(KPriorityVeryHigh)
+	{
+	iLoaderDeletedList=NULL;
+	}
+
+CActiveReaper* CActiveReaper::New()
+	{
+	CActiveReaper *self = new CActiveReaper();
+	if (self!=NULL)
+		self->Construct();
+	return self;
+	}
+
+void CActiveReaper::Construct()
+	{
+	iStatus=KRequestPending;
+	CActiveScheduler::Add(this);
+	E32Loader::NotifyIfCodeSegDestroyed(iStatus);
+	SetActive();
+	}
+
+/*
+Initialises the \sys\del\ directory, where files can be moved too, on deletion.
+If the directory exists, then it is emptied.
+*/
+
+void CActiveReaper::InitDelDir()
+	{
+	TDriveList driveList;
+	TDriveInfo driveInfo;
+	CDir* dir=NULL;
+	TFileName fileName;
+	TInt i;
+	TBuf<KPathDelLength> drivePath(KPathDel);
+	TInt r = gTheLoaderFs.DriveList(driveList);
+	if (r!=KErrNone)
+		return;
+	TChar ch;
+	for (TInt drvNum=0; drvNum<KMaxDrives; ++drvNum)
+		{
+	    if(!driveList[drvNum])
+	        continue;   //-- skip nonexistent drive
+	    r = gTheLoaderFs.Drive(driveInfo, drvNum);
+	    if ((r==KErrNone) && (driveInfo.iDriveAtt & KDriveAttPageable) && !(driveInfo.iMediaAtt & KMediaAttWriteProtected))
+			{
+			gTheLoaderFs.DriveToChar(drvNum, ch);
+			drivePath[0]=(TText)ch;
+			r = gTheLoaderFs.GetDir(drivePath,KEntryAttMatchExclude | KEntryAttDir ,ESortNone,dir);
+			if (r==KErrNone)
+				{
+				for (i=dir->Count()-1;i>=0;i--)
+					{
+					fileName = drivePath;
+					fileName.Append((*dir)[i].iName);
+					r = gTheLoaderFs.SetAtt(fileName,0,KEntryAttReadOnly|KEntryAttSystem);
+					r = gTheLoaderFs.Delete(fileName);
+					}						
+				delete dir;
+				}
+			}
+		}
+	}
+
+
+void CActiveReaper::RunL()
+	{   
+	
+	TCodeSegLoaderCookie cookie;
+	TInt r;
+
+	TLoaderDeletedList* link;
+	TLoaderDeletedList* prev;
+
+	iStatus=KRequestPending;
+	E32Loader::NotifyIfCodeSegDestroyed(iStatus);
+	SetActive();
+	FOREVER
+		{
+		r=E32Loader::GetDestroyedCodeSegInfo(cookie);
+		if (r!=KErrNone)
+			break;
+		r = cookie.iFileClamp.Close(gTheLoaderFs);
+		// See if its on our list.
+		if (r==KErrNone) 
+			{
+			link = iLoaderDeletedList;
+			prev= (TLoaderDeletedList*) &iLoaderDeletedList;
+
+			while (link!=NULL)
+				{
+				if ((link->iStartBlock==cookie.iStartAddress) && (link->iDriveNumber==cookie.iDriveNumber))
+					{
+					gTheLoaderFs.Delete(*link->iFileName);
+					// Ignore error from file delete operation. If it does fail then the
+					// file will just have to sit around until it is cleaned up on the next reboot.
+
+					// Remove from our list.
+					prev->iNext=link->iNext;
+					delete link;
+					link = prev->iNext;
+					}
+				else
+					{
+					prev = link;
+					link = link->iNext;
+					}
+				}// while
+			} // if unclamp ok
+		} //Forever
+	}
+
+void CActiveReaper::DoCancel(){};
+
+CActiveReaper::~CActiveReaper() {}
+
+void CActiveReaper::AddDeleted(TLoaderDeletedList* aLink)
+	{
+	aLink->iNext=iLoaderDeletedList;
+	iLoaderDeletedList = aLink;
+	}
+
+/* Slotted allocator - used to store iFileData from hashchecked images */
+
+TInt CSlottedChunkAllocator::Construct()
+	{
+	TInt r = iChunk.CreateDisconnectedLocal(0, 0, KSlotSize * KSlots);
+	if (r == KErrNone)
+		iBase = iChunk.Base();
+	return r;
+	}
+
+TAny* CSlottedChunkAllocator::Alloc(TUint aSize)
+	{
+	if (aSize == 0 || aSize > KSlotSize)
+		return NULL;
+
+	for (TInt i=0; i<KSlots; ++i)
+		if (!iUsed[i])
+			{
+			if (iChunk.Commit(i * KSlotSize, aSize) == KErrNone)
+				{
+				iUsed[i] = aSize;
+				return iBase + i * KSlotSize;
+				}
+			else
+				return NULL;
+			}
+
+	return NULL;
+	}
+
+void CSlottedChunkAllocator::Free(TAny* aPtr)
+	{
+	if (!aPtr)
+		return;
+
+	TInt offset = ((TUint8*)aPtr) - iBase;
+	TInt slot = offset / KSlotSize;
+	__ASSERT_DEBUG(offset % KSlotSize == 0 && slot >= 0 && slot < KSlots, Fault(ELdrFileDataAllocError));
+#ifdef _DEBUG
+	TInt r = 
+#endif
+	iChunk.Decommit(offset, iUsed[slot]);
+	__ASSERT_DEBUG(r==KErrNone, Fault(ELdrFileDataAllocError));
+	iUsed[slot] = 0;
+	}