/*
* tclWin32Dll.c --
*
* This file contains the DLL entry point.
*
* Copyright (c) 1995-1996 Sun Microsystems, Inc.
* Copyright (c) 1998-2000 Scriptics Corporation.
*
* See the file "license.terms" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
* RCS: @(#) $Id: tclWin32Dll.c,v 1.24.2.9 2006/03/10 10:35:24 vincentdarley Exp $
*/
#include "tclWinInt.h"
/*
* The following data structures are used when loading the thunking
* library for execing child processes under Win32s.
*/
typedef DWORD (WINAPI UT32PROC)(LPVOID lpBuff, DWORD dwUserDefined,
LPVOID *lpTranslationList);
typedef BOOL (WINAPI UTREGISTER)(HANDLE hModule, LPCSTR SixteenBitDLL,
LPCSTR InitName, LPCSTR ProcName, UT32PROC **ThirtyTwoBitThunk,
FARPROC UT32Callback, LPVOID Buff);
typedef VOID (WINAPI UTUNREGISTER)(HANDLE hModule);
/*
* The following variables keep track of information about this DLL
* on a per-instance basis. Each time this DLL is loaded, it gets its own
* new data segment with its own copy of all static and global information.
*/
static HINSTANCE hInstance; /* HINSTANCE of this DLL. */
static int platformId; /* Running under NT, or 95/98? */
#ifdef HAVE_NO_SEH
/*
* Unlike Borland and Microsoft, we don't register exception handlers
* by pushing registration records onto the runtime stack. Instead, we
* register them by creating an EXCEPTION_REGISTRATION within the activation
* record.
*/
typedef struct EXCEPTION_REGISTRATION {
struct EXCEPTION_REGISTRATION* link;
EXCEPTION_DISPOSITION (*handler)( struct _EXCEPTION_RECORD*, void*,
struct _CONTEXT*, void* );
void* ebp;
void* esp;
int status;
} EXCEPTION_REGISTRATION;
#endif
/*
* VC++ 5.x has no 'cpuid' assembler instruction, so we
* must emulate it
*/
#if defined(_MSC_VER) && ( _MSC_VER <= 1100 )
#define cpuid __asm __emit 0fh __asm __emit 0a2h
#endif
/*
* The following function tables are used to dispatch to either the
* wide-character or multi-byte versions of the operating system calls,
* depending on whether the Unicode calls are available.
*/
static TclWinProcs asciiProcs = {
0,
(BOOL (WINAPI *)(CONST TCHAR *, LPDCB)) BuildCommDCBA,
(TCHAR *(WINAPI *)(TCHAR *)) CharLowerA,
(BOOL (WINAPI *)(CONST TCHAR *, CONST TCHAR *, BOOL)) CopyFileA,
(BOOL (WINAPI *)(CONST TCHAR *, LPSECURITY_ATTRIBUTES)) CreateDirectoryA,
(HANDLE (WINAPI *)(CONST TCHAR *, DWORD, DWORD, SECURITY_ATTRIBUTES *,
DWORD, DWORD, HANDLE)) CreateFileA,
(BOOL (WINAPI *)(CONST TCHAR *, TCHAR *, LPSECURITY_ATTRIBUTES,
LPSECURITY_ATTRIBUTES, BOOL, DWORD, LPVOID, CONST TCHAR *,
LPSTARTUPINFOA, LPPROCESS_INFORMATION)) CreateProcessA,
(BOOL (WINAPI *)(CONST TCHAR *)) DeleteFileA,
(HANDLE (WINAPI *)(CONST TCHAR *, WIN32_FIND_DATAT *)) FindFirstFileA,
(BOOL (WINAPI *)(HANDLE, WIN32_FIND_DATAT *)) FindNextFileA,
(BOOL (WINAPI *)(WCHAR *, LPDWORD)) GetComputerNameA,
(DWORD (WINAPI *)(DWORD, WCHAR *)) GetCurrentDirectoryA,
(DWORD (WINAPI *)(CONST TCHAR *)) GetFileAttributesA,
(DWORD (WINAPI *)(CONST TCHAR *, DWORD nBufferLength, WCHAR *,
TCHAR **)) GetFullPathNameA,
(DWORD (WINAPI *)(HMODULE, WCHAR *, int)) GetModuleFileNameA,
(DWORD (WINAPI *)(CONST TCHAR *, WCHAR *, DWORD)) GetShortPathNameA,
(UINT (WINAPI *)(CONST TCHAR *, CONST TCHAR *, UINT uUnique,
WCHAR *)) GetTempFileNameA,
(DWORD (WINAPI *)(DWORD, WCHAR *)) GetTempPathA,
(BOOL (WINAPI *)(CONST TCHAR *, WCHAR *, DWORD, LPDWORD, LPDWORD, LPDWORD,
WCHAR *, DWORD)) GetVolumeInformationA,
(HINSTANCE (WINAPI *)(CONST TCHAR *)) LoadLibraryA,
(TCHAR (WINAPI *)(WCHAR *, CONST TCHAR *)) lstrcpyA,
(BOOL (WINAPI *)(CONST TCHAR *, CONST TCHAR *)) MoveFileA,
(BOOL (WINAPI *)(CONST TCHAR *)) RemoveDirectoryA,
(DWORD (WINAPI *)(CONST TCHAR *, CONST TCHAR *, CONST TCHAR *, DWORD,
WCHAR *, TCHAR **)) SearchPathA,
(BOOL (WINAPI *)(CONST TCHAR *)) SetCurrentDirectoryA,
(BOOL (WINAPI *)(CONST TCHAR *, DWORD)) SetFileAttributesA,
/*
* The three NULL function pointers will only be set when
* Tcl_FindExecutable is called. If you don't ever call that
* function, the application will crash whenever WinTcl tries to call
* functions through these null pointers. That is not a bug in Tcl
* -- Tcl_FindExecutable is obligatory in recent Tcl releases.
*/
NULL,
NULL,
(int (__cdecl*)(CONST TCHAR *, struct _utimbuf *)) _utime,
NULL,
NULL,
/* getLongPathNameProc */
NULL,
/* Security SDK - not available on 95,98,ME */
NULL, NULL, NULL, NULL, NULL, NULL,
/* ReadConsole and WriteConsole */
(BOOL (WINAPI *)(HANDLE, LPVOID, DWORD, LPDWORD, LPVOID)) ReadConsoleA,
(BOOL (WINAPI *)(HANDLE, const VOID*, DWORD, LPDWORD, LPVOID)) WriteConsoleA
};
static TclWinProcs unicodeProcs = {
1,
(BOOL (WINAPI *)(CONST TCHAR *, LPDCB)) BuildCommDCBW,
(TCHAR *(WINAPI *)(TCHAR *)) CharLowerW,
(BOOL (WINAPI *)(CONST TCHAR *, CONST TCHAR *, BOOL)) CopyFileW,
(BOOL (WINAPI *)(CONST TCHAR *, LPSECURITY_ATTRIBUTES)) CreateDirectoryW,
(HANDLE (WINAPI *)(CONST TCHAR *, DWORD, DWORD, SECURITY_ATTRIBUTES *,
DWORD, DWORD, HANDLE)) CreateFileW,
(BOOL (WINAPI *)(CONST TCHAR *, TCHAR *, LPSECURITY_ATTRIBUTES,
LPSECURITY_ATTRIBUTES, BOOL, DWORD, LPVOID, CONST TCHAR *,
LPSTARTUPINFOA, LPPROCESS_INFORMATION)) CreateProcessW,
(BOOL (WINAPI *)(CONST TCHAR *)) DeleteFileW,
(HANDLE (WINAPI *)(CONST TCHAR *, WIN32_FIND_DATAT *)) FindFirstFileW,
(BOOL (WINAPI *)(HANDLE, WIN32_FIND_DATAT *)) FindNextFileW,
(BOOL (WINAPI *)(WCHAR *, LPDWORD)) GetComputerNameW,
(DWORD (WINAPI *)(DWORD, WCHAR *)) GetCurrentDirectoryW,
(DWORD (WINAPI *)(CONST TCHAR *)) GetFileAttributesW,
(DWORD (WINAPI *)(CONST TCHAR *, DWORD nBufferLength, WCHAR *,
TCHAR **)) GetFullPathNameW,
(DWORD (WINAPI *)(HMODULE, WCHAR *, int)) GetModuleFileNameW,
(DWORD (WINAPI *)(CONST TCHAR *, WCHAR *, DWORD)) GetShortPathNameW,
(UINT (WINAPI *)(CONST TCHAR *, CONST TCHAR *, UINT uUnique,
WCHAR *)) GetTempFileNameW,
(DWORD (WINAPI *)(DWORD, WCHAR *)) GetTempPathW,
(BOOL (WINAPI *)(CONST TCHAR *, WCHAR *, DWORD, LPDWORD, LPDWORD, LPDWORD,
WCHAR *, DWORD)) GetVolumeInformationW,
(HINSTANCE (WINAPI *)(CONST TCHAR *)) LoadLibraryW,
(TCHAR (WINAPI *)(WCHAR *, CONST TCHAR *)) lstrcpyW,
(BOOL (WINAPI *)(CONST TCHAR *, CONST TCHAR *)) MoveFileW,
(BOOL (WINAPI *)(CONST TCHAR *)) RemoveDirectoryW,
(DWORD (WINAPI *)(CONST TCHAR *, CONST TCHAR *, CONST TCHAR *, DWORD,
WCHAR *, TCHAR **)) SearchPathW,
(BOOL (WINAPI *)(CONST TCHAR *)) SetCurrentDirectoryW,
(BOOL (WINAPI *)(CONST TCHAR *, DWORD)) SetFileAttributesW,
/*
* The three NULL function pointers will only be set when
* Tcl_FindExecutable is called. If you don't ever call that
* function, the application will crash whenever WinTcl tries to call
* functions through these null pointers. That is not a bug in Tcl
* -- Tcl_FindExecutable is obligatory in recent Tcl releases.
*/
NULL,
NULL,
(int (__cdecl*)(CONST TCHAR *, struct _utimbuf *)) _wutime,
NULL,
NULL,
/* getLongPathNameProc */
NULL,
/* Security SDK - will be filled in on NT,XP,2000,2003 */
NULL, NULL, NULL, NULL, NULL, NULL,
/* ReadConsole and WriteConsole */
(BOOL (WINAPI *)(HANDLE, LPVOID, DWORD, LPDWORD, LPVOID)) ReadConsoleW,
(BOOL (WINAPI *)(HANDLE, const VOID*, DWORD, LPDWORD, LPVOID)) WriteConsoleW
};
TclWinProcs *tclWinProcs;
static Tcl_Encoding tclWinTCharEncoding;
#ifdef HAVE_NO_SEH
/* Need to add noinline flag to DllMain declaration so that gcc -O3
* does not inline asm code into DllEntryPoint and cause a
* compile time error because of redefined local labels.
*/
BOOL APIENTRY DllMain(HINSTANCE hInst, DWORD reason,
LPVOID reserved)
__attribute__ ((noinline));
#else
/*
* The following declaration is for the VC++ DLL entry point.
*/
BOOL APIENTRY DllMain(HINSTANCE hInst, DWORD reason,
LPVOID reserved);
#endif /* HAVE_NO_SEH */
/*
* The following structure and linked list is to allow us to map between
* volume mount points and drive letters on the fly (no Win API exists
* for this).
*/
typedef struct MountPointMap {
CONST WCHAR* volumeName; /* Native wide string volume name */
char driveLetter; /* Drive letter corresponding to
* the volume name. */
struct MountPointMap* nextPtr; /* Pointer to next structure in list,
* or NULL */
} MountPointMap;
/*
* This is the head of the linked list, which is protected by the
* mutex which follows, for thread-enabled builds.
*/
MountPointMap *driveLetterLookup = NULL;
TCL_DECLARE_MUTEX(mountPointMap)
/* We will need this below */
extern Tcl_FSDupInternalRepProc NativeDupInternalRep;
#ifdef __WIN32__
#ifndef STATIC_BUILD
/*
*----------------------------------------------------------------------
*
* DllEntryPoint --
*
* This wrapper function is used by Borland to invoke the
* initialization code for Tcl. It simply calls the DllMain
* routine.
*
* Results:
* See DllMain.
*
* Side effects:
* See DllMain.
*
*----------------------------------------------------------------------
*/
BOOL APIENTRY
DllEntryPoint(hInst, reason, reserved)
HINSTANCE hInst; /* Library instance handle. */
DWORD reason; /* Reason this function is being called. */
LPVOID reserved; /* Not used. */
{
return DllMain(hInst, reason, reserved);
}
/*
*----------------------------------------------------------------------
*
* DllMain --
*
* This routine is called by the VC++ C run time library init
* code, or the DllEntryPoint routine. It is responsible for
* initializing various dynamically loaded libraries.
*
* Results:
* TRUE on sucess, FALSE on failure.
*
* Side effects:
* Establishes 32-to-16 bit thunk and initializes sockets library.
*
*----------------------------------------------------------------------
*/
BOOL APIENTRY
DllMain(hInst, reason, reserved)
HINSTANCE hInst; /* Library instance handle. */
DWORD reason; /* Reason this function is being called. */
LPVOID reserved; /* Not used. */
{
#ifdef HAVE_NO_SEH
EXCEPTION_REGISTRATION registration;
#endif
switch (reason) {
case DLL_PROCESS_ATTACH:
DisableThreadLibraryCalls(hInst);
TclWinInit(hInst);
return TRUE;
case DLL_PROCESS_DETACH:
/*
* Protect the call to Tcl_Finalize. The OS could be unloading
* us from an exception handler and the state of the stack might
* be unstable.
*/
#ifdef HAVE_NO_SEH
__asm__ __volatile__ (
/*
* Construct an EXCEPTION_REGISTRATION to protect the
* call to Tcl_Finalize
*/
"leal %[registration], %%edx" "\n\t"
"movl %%fs:0, %%eax" "\n\t"
"movl %%eax, 0x0(%%edx)" "\n\t" /* link */
"leal 1f, %%eax" "\n\t"
"movl %%eax, 0x4(%%edx)" "\n\t" /* handler */
"movl %%ebp, 0x8(%%edx)" "\n\t" /* ebp */
"movl %%esp, 0xc(%%edx)" "\n\t" /* esp */
"movl %[error], 0x10(%%edx)" "\n\t" /* status */
/*
* Link the EXCEPTION_REGISTRATION on the chain
*/
"movl %%edx, %%fs:0" "\n\t"
/*
* Call Tcl_Finalize
*/
"call _Tcl_Finalize" "\n\t"
/*
* Come here on a normal exit. Recover the EXCEPTION_REGISTRATION
* and store a TCL_OK status
*/
"movl %%fs:0, %%edx" "\n\t"
"movl %[ok], %%eax" "\n\t"
"movl %%eax, 0x10(%%edx)" "\n\t"
"jmp 2f" "\n"
/*
* Come here on an exception. Get the EXCEPTION_REGISTRATION
* that we previously put on the chain.
*/
"1:" "\t"
"movl %%fs:0, %%edx" "\n\t"
"movl 0x8(%%edx), %%edx" "\n"
/*
* Come here however we exited. Restore context from the
* EXCEPTION_REGISTRATION in case the stack is unbalanced.
*/
"2:" "\t"
"movl 0xc(%%edx), %%esp" "\n\t"
"movl 0x8(%%edx), %%ebp" "\n\t"
"movl 0x0(%%edx), %%eax" "\n\t"
"movl %%eax, %%fs:0" "\n\t"
:
/* No outputs */
:
[registration] "m" (registration),
[ok] "i" (TCL_OK),
[error] "i" (TCL_ERROR)
:
"%eax", "%ebx", "%ecx", "%edx", "%esi", "%edi", "memory"
);
#else /* HAVE_NO_SEH */
__try {
Tcl_Finalize();
} __except (EXCEPTION_EXECUTE_HANDLER) {
/* empty handler body. */
}
#endif
break;
}
return TRUE;
}
#endif /* !STATIC_BUILD */
#endif /* __WIN32__ */
/*
*----------------------------------------------------------------------
*
* TclWinGetTclInstance --
*
* Retrieves the global library instance handle.
*
* Results:
* Returns the global library instance handle.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
HINSTANCE
TclWinGetTclInstance()
{
return hInstance;
}
/*
*----------------------------------------------------------------------
*
* TclWinInit --
*
* This function initializes the internal state of the tcl library.
*
* Results:
* None.
*
* Side effects:
* Initializes the tclPlatformId variable.
*
*----------------------------------------------------------------------
*/
void
TclWinInit(hInst)
HINSTANCE hInst; /* Library instance handle. */
{
OSVERSIONINFO os;
hInstance = hInst;
os.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
GetVersionEx(&os);
platformId = os.dwPlatformId;
/*
* We no longer support Win32s, so just in case someone manages to
* get a runtime there, make sure they know that.
*/
if (platformId == VER_PLATFORM_WIN32s) {
panic("Win32s is not a supported platform");
}
tclWinProcs = &asciiProcs;
}
/*
*----------------------------------------------------------------------
*
* TclWinGetPlatformId --
*
* Determines whether running under NT, 95, or Win32s, to allow
* runtime conditional code.
*
* Results:
* The return value is one of:
* VER_PLATFORM_WIN32s Win32s on Windows 3.1. (not supported)
* VER_PLATFORM_WIN32_WINDOWS Win32 on Windows 95.
* VER_PLATFORM_WIN32_NT Win32 on Windows NT
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
int
TclWinGetPlatformId()
{
return platformId;
}
/*
*-------------------------------------------------------------------------
*
* TclWinNoBackslash --
*
* We're always iterating through a string in Windows, changing the
* backslashes to slashes for use in Tcl.
*
* Results:
* All backslashes in given string are changed to slashes.
*
* Side effects:
* None.
*
*-------------------------------------------------------------------------
*/
char *
TclWinNoBackslash(
char *path) /* String to change. */
{
char *p;
for (p = path; *p != '\0'; p++) {
if (*p == '\\') {
*p = '/';
}
}
return path;
}
/*
*----------------------------------------------------------------------
*
* TclpCheckStackSpace --
*
* Detect if we are about to blow the stack. Called before an
* evaluation can happen when nesting depth is checked.
*
* Results:
* 1 if there is enough stack space to continue; 0 if not.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
int
TclpCheckStackSpace()
{
#ifdef HAVE_NO_SEH
EXCEPTION_REGISTRATION registration;
#endif
int retval = 0;
/*
* We can recurse only if there is at least TCL_WIN_STACK_THRESHOLD
* bytes of stack space left. alloca() is cheap on windows; basically
* it just subtracts from the stack pointer causing the OS to throw an
* exception if the stack pointer is set below the bottom of the stack.
*/
#ifdef HAVE_NO_SEH
__asm__ __volatile__ (
/*
* Construct an EXCEPTION_REGISTRATION to protect the
* call to __alloca
*/
"leal %[registration], %%edx" "\n\t"
"movl %%fs:0, %%eax" "\n\t"
"movl %%eax, 0x0(%%edx)" "\n\t" /* link */
"leal 1f, %%eax" "\n\t"
"movl %%eax, 0x4(%%edx)" "\n\t" /* handler */
"movl %%ebp, 0x8(%%edx)" "\n\t" /* ebp */
"movl %%esp, 0xc(%%edx)" "\n\t" /* esp */
"movl %[error], 0x10(%%edx)" "\n\t" /* status */
/*
* Link the EXCEPTION_REGISTRATION on the chain
*/
"movl %%edx, %%fs:0" "\n\t"
/*
* Attempt a call to __alloca, to determine whether there's
* sufficient memory to be had.
*/
"movl %[size], %%eax" "\n\t"
"pushl %%eax" "\n\t"
"call __alloca" "\n\t"
/*
* Come here on a normal exit. Recover the EXCEPTION_REGISTRATION
* and store a TCL_OK status
*/
"movl %%fs:0, %%edx" "\n\t"
"movl %[ok], %%eax" "\n\t"
"movl %%eax, 0x10(%%edx)" "\n\t"
"jmp 2f" "\n"
/*
* Come here on an exception. Get the EXCEPTION_REGISTRATION
* that we previously put on the chain.
*/
"1:" "\t"
"movl %%fs:0, %%edx" "\n\t"
"movl 0x8(%%edx), %%edx" "\n\t"
/*
* Come here however we exited. Restore context from the
* EXCEPTION_REGISTRATION in case the stack is unbalanced.
*/
"2:" "\t"
"movl 0xc(%%edx), %%esp" "\n\t"
"movl 0x8(%%edx), %%ebp" "\n\t"
"movl 0x0(%%edx), %%eax" "\n\t"
"movl %%eax, %%fs:0" "\n\t"
:
/* No outputs */
:
[registration] "m" (registration),
[ok] "i" (TCL_OK),
[error] "i" (TCL_ERROR),
[size] "i" (TCL_WIN_STACK_THRESHOLD)
:
"%eax", "%ebx", "%ecx", "%edx", "%esi", "%edi", "memory"
);
retval = (registration.status == TCL_OK);
#else /* !HAVE_NO_SEH */
__try {
#ifdef HAVE_ALLOCA_GCC_INLINE
__asm__ __volatile__ (
"movl %0, %%eax" "\n\t"
"call __alloca" "\n\t"
:
: "i"(TCL_WIN_STACK_THRESHOLD)
: "%eax");
#else
alloca(TCL_WIN_STACK_THRESHOLD);
#endif /* HAVE_ALLOCA_GCC_INLINE */
retval = 1;
} __except (EXCEPTION_EXECUTE_HANDLER) {}
#endif /* HAVE_NO_SEH */
return retval;
}
/*
*----------------------------------------------------------------------
*
* TclWinGetPlatform --
*
* This is a kludge that allows the test library to get access
* the internal tclPlatform variable.
*
* Results:
* Returns a pointer to the tclPlatform variable.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
TclPlatformType *
TclWinGetPlatform()
{
return &tclPlatform;
}
/*
*---------------------------------------------------------------------------
*
* TclWinSetInterfaces --
*
* A helper proc that allows the test library to change the
* tclWinProcs structure to dispatch to either the wide-character
* or multi-byte versions of the operating system calls, depending
* on whether Unicode is the system encoding.
*
* As well as this, we can also try to load in some additional
* procs which may/may not be present depending on the current
* Windows version (e.g. Win95 will not have the procs below).
*
* Results:
* None.
*
* Side effects:
* None.
*
*---------------------------------------------------------------------------
*/
void
TclWinSetInterfaces(
int wide) /* Non-zero to use wide interfaces, 0
* otherwise. */
{
Tcl_FreeEncoding(tclWinTCharEncoding);
if (wide) {
tclWinProcs = &unicodeProcs;
tclWinTCharEncoding = Tcl_GetEncoding(NULL, "unicode");
if (tclWinProcs->getFileAttributesExProc == NULL) {
HINSTANCE hInstance = LoadLibraryA("kernel32");
if (hInstance != NULL) {
tclWinProcs->getFileAttributesExProc =
(BOOL (WINAPI *)(CONST TCHAR *, GET_FILEEX_INFO_LEVELS,
LPVOID)) GetProcAddress(hInstance, "GetFileAttributesExW");
tclWinProcs->createHardLinkProc =
(BOOL (WINAPI *)(CONST TCHAR *, CONST TCHAR*,
LPSECURITY_ATTRIBUTES)) GetProcAddress(hInstance,
"CreateHardLinkW");
tclWinProcs->findFirstFileExProc =
(HANDLE (WINAPI *)(CONST TCHAR*, UINT,
LPVOID, UINT, LPVOID, DWORD)) GetProcAddress(hInstance,
"FindFirstFileExW");
tclWinProcs->getVolumeNameForVMPProc =
(BOOL (WINAPI *)(CONST TCHAR*, TCHAR*,
DWORD)) GetProcAddress(hInstance,
"GetVolumeNameForVolumeMountPointW");
FreeLibrary(hInstance);
}
hInstance = LoadLibraryA("advapi32");
if (hInstance != NULL) {
tclWinProcs->getFileSecurityProc = (BOOL (WINAPI *)(
LPCTSTR lpFileName,
SECURITY_INFORMATION RequestedInformation,
PSECURITY_DESCRIPTOR pSecurityDescriptor,
DWORD nLength, LPDWORD lpnLengthNeeded))
GetProcAddress(hInstance, "GetFileSecurityW");
tclWinProcs->impersonateSelfProc = (BOOL (WINAPI *) (
SECURITY_IMPERSONATION_LEVEL ImpersonationLevel))
GetProcAddress(hInstance, "ImpersonateSelf");
tclWinProcs->openThreadTokenProc = (BOOL (WINAPI *) (
HANDLE ThreadHandle, DWORD DesiredAccess,
BOOL OpenAsSelf, PHANDLE TokenHandle))
GetProcAddress(hInstance, "OpenThreadToken");
tclWinProcs->revertToSelfProc = (BOOL (WINAPI *) (void))
GetProcAddress(hInstance, "RevertToSelf");
tclWinProcs->mapGenericMaskProc = (VOID (WINAPI *) (
PDWORD AccessMask, PGENERIC_MAPPING GenericMapping))
GetProcAddress(hInstance, "MapGenericMask");
tclWinProcs->accessCheckProc = (BOOL (WINAPI *)(
PSECURITY_DESCRIPTOR pSecurityDescriptor,
HANDLE ClientToken, DWORD DesiredAccess,
PGENERIC_MAPPING GenericMapping,
PPRIVILEGE_SET PrivilegeSet,
LPDWORD PrivilegeSetLength, LPDWORD GrantedAccess,
LPBOOL AccessStatus)) GetProcAddress(hInstance,
"AccessCheck");
FreeLibrary(hInstance);
}
}
} else {
tclWinProcs = &asciiProcs;
tclWinTCharEncoding = NULL;
if (tclWinProcs->getFileAttributesExProc == NULL) {
HINSTANCE hInstance = LoadLibraryA("kernel32");
if (hInstance != NULL) {
tclWinProcs->getFileAttributesExProc =
(BOOL (WINAPI *)(CONST TCHAR *, GET_FILEEX_INFO_LEVELS,
LPVOID)) GetProcAddress(hInstance, "GetFileAttributesExA");
tclWinProcs->createHardLinkProc =
(BOOL (WINAPI *)(CONST TCHAR *, CONST TCHAR*,
LPSECURITY_ATTRIBUTES)) GetProcAddress(hInstance,
"CreateHardLinkA");
tclWinProcs->findFirstFileExProc =
(HANDLE (WINAPI *)(CONST TCHAR*, UINT,
LPVOID, UINT, LPVOID, DWORD)) GetProcAddress(hInstance,
"FindFirstFileExA");
tclWinProcs->getLongPathNameProc = NULL;
tclWinProcs->getVolumeNameForVMPProc =
(BOOL (WINAPI *)(CONST TCHAR*, TCHAR*,
DWORD)) GetProcAddress(hInstance,
"GetVolumeNameForVolumeMountPointA");
FreeLibrary(hInstance);
}
}
}
}
/*
*---------------------------------------------------------------------------
*
* TclWinResetInterfaceEncodings --
*
* Called during finalization to free up any encodings we use.
* The tclWinProcs-> look up table is still ok to use after
* this call, provided no encoding conversion is required.
*
* We also clean up any memory allocated in our mount point
* map which is used to follow certain kinds of symlinks.
* That code should never be used once encodings are taken
* down.
*
* Results:
* None.
*
* Side effects:
* None.
*
*---------------------------------------------------------------------------
*/
void
TclWinResetInterfaceEncodings()
{
MountPointMap *dlIter, *dlIter2;
if (tclWinTCharEncoding != NULL) {
Tcl_FreeEncoding(tclWinTCharEncoding);
tclWinTCharEncoding = NULL;
}
/* Clean up the mount point map */
Tcl_MutexLock(&mountPointMap);
dlIter = driveLetterLookup;
while (dlIter != NULL) {
dlIter2 = dlIter->nextPtr;
ckfree((char*)dlIter->volumeName);
ckfree((char*)dlIter);
dlIter = dlIter2;
}
Tcl_MutexUnlock(&mountPointMap);
}
/*
*---------------------------------------------------------------------------
*
* TclWinResetInterfaces --
*
* Called during finalization to reset us to a safe state for reuse.
* After this call, it is best not to use the tclWinProcs-> look
* up table since it is likely to be different to what is expected.
*
* Results:
* None.
*
* Side effects:
* None.
*
*---------------------------------------------------------------------------
*/
void
TclWinResetInterfaces()
{
tclWinProcs = &asciiProcs;
}
/*
*--------------------------------------------------------------------
*
* TclWinDriveLetterForVolMountPoint
*
* Unfortunately, Windows provides no easy way at all to get hold
* of the drive letter for a volume mount point, but we need that
* information to understand paths correctly. So, we have to
* build an associated array to find these correctly, and allow
* quick and easy lookup from volume mount points to drive letters.
*
* We assume here that we are running on a system for which the wide
* character interfaces are used, which is valid for Win 2000 and WinXP
* which are the only systems on which this function will ever be called.
*
* Result: the drive letter, or -1 if no drive letter corresponds to
* the given mount point.
*
*--------------------------------------------------------------------
*/
char
TclWinDriveLetterForVolMountPoint(CONST WCHAR *mountPoint)
{
MountPointMap *dlIter, *dlPtr2;
WCHAR Target[55]; /* Target of mount at mount point */
WCHAR drive[4] = { L'A', L':', L'\\', L'\0' };
/*
* Detect the volume mounted there. Unfortunately, there is no
* simple way to map a unique volume name to a DOS drive letter.
* So, we have to build an associative array.
*/
Tcl_MutexLock(&mountPointMap);
dlIter = driveLetterLookup;
while (dlIter != NULL) {
if (wcscmp(dlIter->volumeName, mountPoint) == 0) {
/*
* We need to check whether this information is
* still valid, since either the user or various
* programs could have adjusted the mount points on
* the fly.
*/
drive[0] = L'A' + (dlIter->driveLetter - 'A');
/* Try to read the volume mount point and see where it points */
if ((*tclWinProcs->getVolumeNameForVMPProc)((TCHAR*)drive,
(TCHAR*)Target, 55) != 0) {
if (wcscmp((WCHAR*)dlIter->volumeName, Target) == 0) {
/* Nothing has changed */
Tcl_MutexUnlock(&mountPointMap);
return dlIter->driveLetter;
}
}
/*
* If we reach here, unfortunately, this mount point is
* no longer valid at all
*/
if (driveLetterLookup == dlIter) {
dlPtr2 = dlIter;
driveLetterLookup = dlIter->nextPtr;
} else {
for (dlPtr2 = driveLetterLookup;
dlPtr2 != NULL; dlPtr2 = dlPtr2->nextPtr) {
if (dlPtr2->nextPtr == dlIter) {
dlPtr2->nextPtr = dlIter->nextPtr;
dlPtr2 = dlIter;
break;
}
}
}
/* Now dlPtr2 points to the structure to free */
ckfree((char*)dlPtr2->volumeName);
ckfree((char*)dlPtr2);
/*
* Restart the loop --- we could try to be clever
* and continue half way through, but the logic is a
* bit messy, so it's cleanest just to restart
*/
dlIter = driveLetterLookup;
continue;
}
dlIter = dlIter->nextPtr;
}
/* We couldn't find it, so we must iterate over the letters */
for (drive[0] = L'A'; drive[0] <= L'Z'; drive[0]++) {
/* Try to read the volume mount point and see where it points */
if ((*tclWinProcs->getVolumeNameForVMPProc)((TCHAR*)drive,
(TCHAR*)Target, 55) != 0) {
int alreadyStored = 0;
for (dlIter = driveLetterLookup; dlIter != NULL;
dlIter = dlIter->nextPtr) {
if (wcscmp((WCHAR*)dlIter->volumeName, Target) == 0) {
alreadyStored = 1;
break;
}
}
if (!alreadyStored) {
dlPtr2 = (MountPointMap*) ckalloc(sizeof(MountPointMap));
dlPtr2->volumeName = NativeDupInternalRep(Target);
dlPtr2->driveLetter = 'A' + (drive[0] - L'A');
dlPtr2->nextPtr = driveLetterLookup;
driveLetterLookup = dlPtr2;
}
}
}
/* Try again */
for (dlIter = driveLetterLookup; dlIter != NULL;
dlIter = dlIter->nextPtr) {
if (wcscmp(dlIter->volumeName, mountPoint) == 0) {
Tcl_MutexUnlock(&mountPointMap);
return dlIter->driveLetter;
}
}
/*
* The volume doesn't appear to correspond to a drive letter -- we
* remember that fact and store '-1' so we don't have to look it
* up each time.
*/
dlPtr2 = (MountPointMap*) ckalloc(sizeof(MountPointMap));
dlPtr2->volumeName = NativeDupInternalRep((ClientData)mountPoint);
dlPtr2->driveLetter = -1;
dlPtr2->nextPtr = driveLetterLookup;
driveLetterLookup = dlPtr2;
Tcl_MutexUnlock(&mountPointMap);
return -1;
}
/*
*---------------------------------------------------------------------------
*
* Tcl_WinUtfToTChar, Tcl_WinTCharToUtf --
*
* Convert between UTF-8 and Unicode when running Windows NT or
* the current ANSI code page when running Windows 95.
*
* On Mac, Unix, and Windows 95, all strings exchanged between Tcl
* and the OS are "char" oriented. We need only one Tcl_Encoding to
* convert between UTF-8 and the system's native encoding. We use
* NULL to represent that encoding.
*
* On NT, some strings exchanged between Tcl and the OS are "char"
* oriented, while others are in Unicode. We need two Tcl_Encoding
* APIs depending on whether we are targeting a "char" or Unicode
* interface.
*
* Calling Tcl_UtfToExternal() or Tcl_ExternalToUtf() with an
* encoding of NULL should always used to convert between UTF-8
* and the system's "char" oriented encoding. The following two
* functions are used in Windows-specific code to convert between
* UTF-8 and Unicode strings (NT) or "char" strings(95). This saves
* you the trouble of writing the following type of fragment over and
* over:
*
* if (running NT) {
* encoding <- Tcl_GetEncoding("unicode");
* nativeBuffer <- UtfToExternal(encoding, utfBuffer);
* Tcl_FreeEncoding(encoding);
* } else {
* nativeBuffer <- UtfToExternal(NULL, utfBuffer);
* }
*
* By convention, in Windows a TCHAR is a character in the ANSI code
* page on Windows 95, a Unicode character on Windows NT. If you
* plan on targeting a Unicode interfaces when running on NT and a
* "char" oriented interface while running on 95, these functions
* should be used. If you plan on targetting the same "char"
* oriented function on both 95 and NT, use Tcl_UtfToExternal()
* with an encoding of NULL.
*
* Results:
* The result is a pointer to the string in the desired target
* encoding. Storage for the result string is allocated in
* dsPtr; the caller must call Tcl_DStringFree() when the result
* is no longer needed.
*
* Side effects:
* None.
*
*---------------------------------------------------------------------------
*/
TCHAR *
Tcl_WinUtfToTChar(string, len, dsPtr)
CONST char *string; /* Source string in UTF-8. */
int len; /* Source string length in bytes, or < 0 for
* strlen(). */
Tcl_DString *dsPtr; /* Uninitialized or free DString in which
* the converted string is stored. */
{
return (TCHAR *) Tcl_UtfToExternalDString(tclWinTCharEncoding,
string, len, dsPtr);
}
char *
Tcl_WinTCharToUtf(string, len, dsPtr)
CONST TCHAR *string; /* Source string in Unicode when running
* NT, ANSI when running 95. */
int len; /* Source string length in bytes, or < 0 for
* platform-specific string length. */
Tcl_DString *dsPtr; /* Uninitialized or free DString in which
* the converted string is stored. */
{
return Tcl_ExternalToUtfDString(tclWinTCharEncoding,
(CONST char *) string, len, dsPtr);
}
/*
*------------------------------------------------------------------------
*
* TclWinCPUID --
*
* Get CPU ID information on an Intel box under Windows
*
* Results:
* Returns TCL_OK if successful, TCL_ERROR if CPUID is not
* supported or fails.
*
* Side effects:
* If successful, stores EAX, EBX, ECX and EDX registers after
* the CPUID instruction in the four integers designated by 'regsPtr'
*
*----------------------------------------------------------------------
*/
int
TclWinCPUID( unsigned int index, /* Which CPUID value to retrieve */
unsigned int * regsPtr ) /* Registers after the CPUID */
{
#ifdef HAVE_NO_SEH
EXCEPTION_REGISTRATION registration;
#endif
int status = TCL_ERROR;
#if defined(__GNUC__) && !defined(_WIN64)
/*
* Execute the CPUID instruction with the given index, and
* store results off 'regPtr'.
*/
__asm__ __volatile__ (
/*
* Construct an EXCEPTION_REGISTRATION to protect the
* CPUID instruction (early 486's don't have CPUID)
*/
"leal %[registration], %%edx" "\n\t"
"movl %%fs:0, %%eax" "\n\t"
"movl %%eax, 0x0(%%edx)" "\n\t" /* link */
"leal 1f, %%eax" "\n\t"
"movl %%eax, 0x4(%%edx)" "\n\t" /* handler */
"movl %%ebp, 0x8(%%edx)" "\n\t" /* ebp */
"movl %%esp, 0xc(%%edx)" "\n\t" /* esp */
"movl %[error], 0x10(%%edx)" "\n\t" /* status */
/*
* Link the EXCEPTION_REGISTRATION on the chain
*/
"movl %%edx, %%fs:0" "\n\t"
/*
* Do the CPUID instruction, and save the results in
* the 'regsPtr' area
*/
"movl %[rptr], %%edi" "\n\t"
"movl %[index], %%eax" "\n\t"
"cpuid" "\n\t"
"movl %%eax, 0x0(%%edi)" "\n\t"
"movl %%ebx, 0x4(%%edi)" "\n\t"
"movl %%ecx, 0x8(%%edi)" "\n\t"
"movl %%edx, 0xc(%%edi)" "\n\t"
/*
* Come here on a normal exit. Recover the EXCEPTION_REGISTRATION
* and store a TCL_OK status
*/
"movl %%fs:0, %%edx" "\n\t"
"movl %[ok], %%eax" "\n\t"
"movl %%eax, 0x10(%%edx)" "\n\t"
"jmp 2f" "\n"
/*
* Come here on an exception. Get the EXCEPTION_REGISTRATION
* that we previously put on the chain.
*/
"1:" "\t"
"movl %%fs:0, %%edx" "\n\t"
"movl 0x8(%%edx), %%edx" "\n\t"
/*
* Come here however we exited. Restore context from the
* EXCEPTION_REGISTRATION in case the stack is unbalanced.
*/
"2:" "\t"
"movl 0xc(%%edx), %%esp" "\n\t"
"movl 0x8(%%edx), %%ebp" "\n\t"
"movl 0x0(%%edx), %%eax" "\n\t"
"movl %%eax, %%fs:0" "\n\t"
:
/* No outputs */
:
[index] "m" (index),
[rptr] "m" (regsPtr),
[registration] "m" (registration),
[ok] "i" (TCL_OK),
[error] "i" (TCL_ERROR)
:
"%eax", "%ebx", "%ecx", "%edx", "%esi", "%edi", "memory" );
status = registration.status;
#elif defined(_MSC_VER) && !defined(_WIN64)
/* Define a structure in the stack frame to hold the registers */
struct {
DWORD dw0;
DWORD dw1;
DWORD dw2;
DWORD dw3;
} regs;
regs.dw0 = index;
/* Execute the CPUID instruction and save regs in the stack frame */
_try {
_asm {
push ebx
push ecx
push edx
mov eax, regs.dw0
cpuid
mov regs.dw0, eax
mov regs.dw1, ebx
mov regs.dw2, ecx
mov regs.dw3, edx
pop edx
pop ecx
pop ebx
}
/* Copy regs back out to the caller */
regsPtr[0]=regs.dw0;
regsPtr[1]=regs.dw1;
regsPtr[2]=regs.dw2;
regsPtr[3]=regs.dw3;
status = TCL_OK;
} __except( EXCEPTION_EXECUTE_HANDLER ) {
}
#else
/* Don't know how to do assembly code for
* this compiler and/or architecture */
#endif
return status;
}