// 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 "Symbian Foundation License v1.0"

// which accompanies this distribution, and is available

// at the URL "http://www.symbianfoundation.org/legal/sfl-v10.html".

//

// Initial Contributors:

// Nokia Corporation - initial contribution.

//

// Contributors:

//

// Description:

// e32\include\e32ldr.h

// 

//

/**

 @file

 @internalTechnology

*/

#ifndef __E32LDR_H__

#define __E32LDR_H__

#include <e32cmn.h>

const TInt KMaxLibraryEntryPoints=0x100;

//

// Loader version number.

//

const TInt KLoaderMajorVersionNumber=1;

const TInt KLoaderMinorVersionNumber=0;

//

// IPC messages to the loader

//

enum TLoaderMsg

	{

	ELoadProcess=1,

	ELoadLibrary=2,

	ELoadLogicalDevice=3,

	ELoadPhysicalDevice=4,

	ELoadLocale=5,

	ELoadFileSystem=6,

	EGetInfo=7,

	ELoaderDebugFunction=8,

	ELoadFSExtension=9,

	EGetInfoFromHeader=10,

	ELoadFSPlugin=11,

	ELoaderCancelLazyDllUnload=12,

	ELdrDelete=13,

	ECheckLibraryHash=14, 

	ELoadFSProxyDrive=15,

    EMaxLoaderMsg

	};

//

// Loader message arguments:

//		0 = TLdrInfo

//		1 = Filename

//		2 = Command line (process) or path (library)

//

class TLdrInfo

	{

public:

	IMPORT_C TLdrInfo();		// for BC

public:

	TUidType iRequestedUids;

	TOwnerType iOwnerType;

	TInt iHandle;

	TUint32 iSecureId;

	TUint32 iRequestedVersion;

	TInt iMinStackSize;			// Size of new process stack 

	};

#ifndef __KERNEL_MODE__

#include <e32std.h>

//

// Loader client class

//

class RLoader : public RSessionBase

	{

public:

	IMPORT_C TInt Connect();

	TVersion Version() const;

	TInt LoadProcess(TInt& aHandle, const TDesC& aFileName, const TDesC& aCommand, const TUidType& aUidType, TOwnerType aType);

	IMPORT_C TInt LoadLibrary(TInt& aHandle, const TDesC& aFileName, const TDesC& aPath, const TUidType& aType, TUint32 aModuleVersion);

	IMPORT_C TInt GetInfo(const TDesC& aFileName, TDes8& aInfoBuf);

	TInt LoadDeviceDriver(const TDesC& aFileName, TInt aDeviceType);

	IMPORT_C TInt DebugFunction(TInt aFunction, TInt a1, TInt a2, TInt a3);

	TInt LoadLocale(const TDesC& aLocaleDllName, TLibraryFunction* aExportList);

	TInt GetInfoFromHeader(const TDesC8& aHeader, TDes8& aInfoBuf);

	IMPORT_C TInt CancelLazyDllUnload();

	IMPORT_C TInt Delete(const TDesC& aFileName);

    IMPORT_C TInt CheckLibraryHash(const TDesC& aFileName, TBool aValidateHash=EFalse);

	TInt LoadProcess(TInt& aHandle, const TDesC& aFileName, const TDesC& aCommand, const TUidType& aUidType, TInt aMinStackSize, TOwnerType aType);

public:

#ifdef __ARMCC__

	// workaround for possible EDG bug (!!)

	inline TInt SendReceive(TInt aFunction,const TIpcArgs& aArgs) const

	  { return RSessionBase::SendReceive(aFunction, aArgs); }

#else

	using RSessionBase::SendReceive;

#endif

#ifdef __TOOLS2__

public:

	void Free();

private:

	TAny* iHandle;

#endif

	};

#endif

//

// Information required to create a new code segment

//

enum TCodeSegAttributes

	{

	ECodeSegAttKernel	=0x00000001,

	ECodeSegAttGlobal	=0x00000002,

	ECodeSegAttFixed	=0x00000004,

	ECodeSegAttABIMask	=0x00000018,	  // same values as in image header

	ECodeSegAttPaged	=0x00000200,	  // the code seg is demand paged

	ECodeSegAttHDll		=(TInt)0x80000000,// Emulator host file type: 1=DLL, 0=EXE

	ECodeSegAttExpVer	=0x40000000,	  // Filename is explicitly versioned

	ECodeSegAttNmdExpData=0x20000000	  // Named symbol export data in code seg

	};

class TBlockMapEntryBase

/**

	Where sections of a file are located on the media.

	The kernel uses this to load in parts of a demand paged file.

 */

	{

public:

	TUint iNumberOfBlocks;  // Number of contiguous blocks in map.

	TUint iStartBlock;		// Number for first block in the map.

	};

struct SBlockMapInfoBase

/**

	Describes context for TBlockMapEntryBase objects.

 */

	{

	TUint iBlockGranularity;	// Size of a block in bytes.

	TUint iBlockStartOffset;	// Offset to start of the file or requested file position within a block.

	TInt64 iStartBlockAddress;	// Address of the first block of the partition.

	TInt iLocalDriveNumber;		// Local drive number of where the file lies on.

	};

// forward declarations from file server

class RFile;

class RFs;

/**

A Handle used to identify a file on storage media.

@internalTechnology

*/

class RFileClamp

	{

public:

	inline RFileClamp()

		{

		iCookie[0] = 0;

		iCookie[1] = 0;

		}

	IMPORT_C TInt Clamp(RFile& aFile);

	IMPORT_C TInt Close(RFs& aFs);

public:

	TInt64 iCookie[2];

	};

class TCodeSegCreateInfo

	{

public:

	TBuf8<KMaxFileName> iFileName;		// not including {MMMMmmmm} version info

	TUidType iUids;				// uid1 indicates EXE or DLL

	TUint32 iAttr;

	TInt iCodeSize;

	TInt iTextSize;

	TInt iDataSize;

	TInt iBssSize;

	TInt iTotalDataSize;

	TUint32 iEntryPtVeneer;		// address of first instruction to be called

	TUint32 iFileEntryPoint;	// address of entry point within this code segment

	TInt iDepCount;

	TUint32 iExportDir;

	TInt iExportDirCount;

	TUint32 iCodeLoadAddress;	// 0 for RAM loaded code, else pointer to TRomImageHeader

	TUint32 iCodeRunAddress;

	TUint32 iDataLoadAddress;

	TUint32 iDataRunAddress;

	TUint32 iExceptionDescriptor;

	TInt iRootNameOffset;

	TInt iRootNameLength;

	TInt iExtOffset;

	TUint32 iModuleVersion;

	SSecurityInfo iS;

	TAny* iHandle;				// pointer to kernel-side DCodeSeg object

	TInt iClientProcessHandle;	// handle to client process for user DLL loads

	/** Code relocation information stored on loader heap. */

	TUint32* iCodeRelocTable;

	/** Size of code relocation table in bytes. */

	TInt iCodeRelocTableSize;

	/** Import fixup information stored on loader heap. */

	TUint32* iImportFixupTable;

	/** Size of import fixup table in bytes. */

	TInt iImportFixupTableSize;

	/** Offset to apply to each code address in the image when it is fixed up. */

	TUint32 iCodeDelta;

	/** Offset to apply to each data address in the image when it is fixed up. */

	TUint32 iDataDelta;

	/**

		Whether the code is paged.  If this is set, then

		TCodeSegCreateInfo::iCodeRelocTable[Size] and

		TCodeSegCreateInfo::iImportFixupTable[Size] contain fixup information

		which the kernel uses to fix up each page.

		(They may be null if the binary has no imports or no code section.)

	 */

	TBool iUseCodePaging;

	/** The UID of the compression scheme in use. */

	TUint32 iCompressionType;

	/**

		Start of compressed pages within the file.  The kernel uses

		this to load compressed pages from byte-pair files when demand

		paging.

	 */

	TInt32* iCodePageOffsets;

	/** Where (possibly compressed) object code starts in iFile. */

	TInt iCodeStartInFile;

	/** Length of (possibly compressed) object code in iFile. */

	TInt iCodeLengthInFile;

	/** Information about block map entries in iCodeBlockMapEntries. */

	SBlockMapInfoBase iCodeBlockMapCommon;

	/** Where object code is located on the media. */

	TBlockMapEntryBase* iCodeBlockMapEntries;

	/** Size of block map entry array in bytes. */

	TInt iCodeBlockMapEntriesSize;

	/**

		File clamp cookie, used to delete the file when the

		codeseg is destroyed.

	 */

	RFileClamp iFileClamp;

public:

	IMPORT_C TPtrC8 RootName() const;

	};

//

// Information required to create a new process

//

class TProcessCreateInfo : public TCodeSegCreateInfo

	{

public:

	TInt iHeapSizeMin;

	TInt iHeapSizeMax;

	TInt iStackSize;

	TInt iClientHandle;			// handle to loader's client

	TInt iProcessHandle;		// handle to new DProcess

	TInt iFinalHandle;			// handle from loader client to new process

	TOwnerType iOwnerType;

	TProcessPriority iPriority;

	TUint iSecurityZone;

	enum TDebugAttributes	// must be the same as RLibrary::TInfoV2::TDebugAttributes

		{

		EDebugAllowed = 1<<0, ///< Flags set if executable may be debugged.

		ETraceAllowed = 1<<1 ///< Flags set if executable may be traced.

		};

	TUint iDebugAttributes;

	TRequestStatus* iDestructStat;

	};

const TUint KSecurityZoneUnique = 0u;

const TUint KSecurityZoneLegacyCode = ~0u;

//

// Information required to attach a code segment to a process

// in the form of a library.

//

class TLibraryCreateInfo

	{

public:

	TAny* iCodeSegHandle;		// pointer to kernel-side DCodeSeg object

	TInt iClientHandle;			// handle to loader's client

	TInt iLibraryHandle;		// handle to new DLibrary

	TOwnerType iOwnerType;

	};

//

// Information required to find an existing code segment

//

class TFindCodeSeg

	{

public:

	TUidType iUids;				// required UIDs

	const TAny* iRomImgHdr;		// ROM image header if ROM code required, NULL otherwise

	TUint32 iAttrMask;			// mask for attributes

	TUint32 iAttrVal;			// required value for masked attributes

	TInt iProcess;				// handle to process in which code is required to operate

								// not used if kernel only specified

	SSecurityInfo iS;			// required capabilities/SID

	TUint32 iModuleVersion;		// required version

	TBuf8<KMaxLibraryName> iName;	// name to look for - zero length means any

	};

//

// Information required to by the reaper from the codeseg.

//

struct TCodeSegLoaderCookie

	{

	RFileClamp iFileClamp;

	TInt64 iStartAddress;

	TInt iDriveNumber;

	};

//

// Loader magic executive functions

//

class E32Loader

	{

public:

	// used by loader only

	IMPORT_C static TInt CodeSegCreate(TCodeSegCreateInfo& aInfo);

	IMPORT_C static TInt CodeSegLoaded(TCodeSegCreateInfo& aInfo);

	IMPORT_C static TInt LibraryCreate(TLibraryCreateInfo& aInfo);

	IMPORT_C static TInt CodeSegOpen(TAny* aHandle, TInt aClientProcessHandle);

	IMPORT_C static void CodeSegClose(TAny* aHandle);

	IMPORT_C static void CodeSegNext(TAny*& aHandle, const TFindCodeSeg& aFind);

	IMPORT_C static void CodeSegInfo(TAny* aHandle, TCodeSegCreateInfo& aInfo);

	IMPORT_C static TInt CodeSegAddDependency(TAny* aImporter, TAny* aExporter);

	IMPORT_C static void CodeSegDeferDeletes();

	IMPORT_C static void CodeSegEndDeferDeletes();

	IMPORT_C static TInt ProcessCreate(TProcessCreateInfo& aInfo, const TDesC8* aCommandLine);

	IMPORT_C static TInt ProcessLoaded(TProcessCreateInfo& aInfo);

	IMPORT_C static TInt CheckClientState(TInt aClientHandle);

	IMPORT_C static TInt DeviceLoad(TAny* aHandle, TInt aType);

	IMPORT_C static TAny* ThreadProcessCodeSeg(TInt aHandle);

	IMPORT_C static void ReadExportDir(TAny* aHandle, TUint32* aDest);

	IMPORT_C static TInt LocaleExports(TAny* aHandle, TLibraryFunction* aExportsList);

#ifdef __MARM__

	IMPORT_C static void GetV7StubAddresses(TLinAddr& aExe, TLinAddr& aDll);

	static TInt V7ExeEntryStub();

	static TInt V7DllEntryStub(TInt aReason);

#endif

	IMPORT_C static TUint32 PagingPolicy();

	IMPORT_C static TInt NotifyIfCodeSegDestroyed(TRequestStatus& aStatus);

	IMPORT_C static TInt GetDestroyedCodeSegInfo(TCodeSegLoaderCookie& aCookie);

public:

	// used by client side

	static TInt WaitDllLock();

	static TInt ReleaseDllLock();

	static TInt LibraryAttach(TInt aHandle, TInt& aNumEps, TLinAddr* aEpList);

	static TInt LibraryAttached(TInt aHandle);

	static TInt StaticCallList(TInt& aNumEps, TLinAddr* aEpList);

	static TInt LibraryDetach(TInt& aNumEps, TLinAddr* aEpList);

	static TInt LibraryDetached();

	};

typedef TInt (*TSupervisorFunction)(TAny*);

// Relocation types

/**

@internalTechnology

@released

*/

const TUint16 KReservedRelocType        = (TUint16)0x0000;

/**

@internalTechnology

@released

*/

const TUint16 KTextRelocType            = (TUint16)0x1000;

/**

@internalTechnology

@released

*/

const TUint16 KDataRelocType            = (TUint16)0x2000;

/**

@internalTechnology

@released

*/

const TUint16 KInferredRelocType        = (TUint16)0x3000;

// Compression types

/**

@internalTechnology

@released

*/

const TUint KFormatNotCompressed=0;

/**

@internalTechnology

@released

*/

const TUint KUidCompressionDeflate=0x101F7AFC;

const TUint KUidCompressionBytePair=0x102822AA;

#endif