/*
* tclWin32Dll.c --
*
* This file contains the DLL entry point and other low-level bit bashing
* code that needs inline assembly.
*
* 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 1.54.2.3 2010/09/08 15:42:13 dgp Exp $
*/
#include "tclWinInt.h"
#ifndef TCL_NO_STACK_CHECK
/*
* The following functions implement stack depth checking
*/
typedef struct ThreadSpecificData {
int *stackBound; /* The current stack boundary */
} ThreadSpecificData;
static Tcl_ThreadDataKey dataKey;
#endif /* TCL_NO_STACK_CHECK */
/*
* 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 *, HANDLE, DWORD)) LoadLibraryExA,
(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
* mandatory in recent Tcl releases.
*/
NULL,
NULL,
/* deleted (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,
(BOOL (WINAPI *)(LPTSTR, LPDWORD)) GetUserNameA
};
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 *, HANDLE, DWORD)) LoadLibraryExW,
(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
* mandatory in recent Tcl releases.
*/
NULL,
NULL,
/* deleted (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,
(BOOL (WINAPI *)(LPTSTR, LPDWORD)) GetUserNameW
};
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 TclNativeDupInternalRep;
#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(
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. This
* might call some sycronization functions, but MSDN documentation
* states: "Waiting on synchronization objects in DllMain can cause a
* deadlock."
*
*----------------------------------------------------------------------
*/
BOOL APIENTRY
DllMain(
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.
*/
#if defined(HAVE_NO_SEH) && !defined(_WIN64)
__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
#ifndef HAVE_NO_SEH
__try {
#endif
Tcl_Finalize();
#ifndef HAVE_NO_SEH
} __except (EXCEPTION_EXECUTE_HANDLER) {
/* empty handler body. */
}
#endif
#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(void)
{
return hInstance;
}
/*
*----------------------------------------------------------------------
*
* TclWinInit --
*
* This function initializes the internal state of the tcl library.
*
* Results:
* None.
*
* Side effects:
* Initializes the tclPlatformId variable.
*
*----------------------------------------------------------------------
*/
void
TclWinInit(
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) {
Tcl_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, 98, ME.
* VER_PLATFORM_WIN32_NT Win32 on Windows NT, 2000, XP
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
int
TclWinGetPlatformId(void)
{
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;
}
/*
*----------------------------------------------------------------------
*
* TclpGetStackParams --
*
* Determine the stack params for the current thread: in which
* direction does the stack grow, and what is the stack lower (resp.
* upper) bound for safe invocation of a new command? This is used to
* cache the values needed for an efficient computation of
* TclpCheckStackSpace() when the interp is known.
*
* Results:
* Returns 1 if the stack grows down, in which case a stack lower bound
* is stored at stackBoundPtr. If the stack grows up, 0 is returned and
* an upper bound is stored at stackBoundPtr. If a bound cannot be
* determined NULL is stored at stackBoundPtr.
*
*----------------------------------------------------------------------
*/
#ifndef TCL_NO_STACK_CHECK
int
TclpGetCStackParams(
int **stackBoundPtr)
{
ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
SYSTEM_INFO si; /* The system information, used to
* determine the page size */
MEMORY_BASIC_INFORMATION mbi;
/* The information about the memory
* area in which the stack resides */
if (!tsdPtr->stackBound
|| ((UINT_PTR)&tsdPtr < (UINT_PTR)tsdPtr->stackBound)) {
/*
* Either we haven't determined the stack bound in this thread,
* or else we've overflowed the bound that we previously
* determined. We need to find a new stack bound from
* Windows.
*/
GetSystemInfo(&si);
if (VirtualQuery((LPCVOID) &tsdPtr, &mbi, sizeof(mbi)) == 0) {
/* For some reason, the system didn't let us query the
* stack size. Nevertheless, we got here and haven't
* blown up yet. Don't update the calculated stack bound.
* If there is no calculated stack bound yet, set it to
* the base of the current page of stack. */
if (!tsdPtr->stackBound) {
tsdPtr->stackBound =
(int*) ((UINT_PTR)(&tsdPtr)
& ~ (UINT_PTR)(si.dwPageSize - 1));
}
} else {
/* The allocation base of the stack segment has to be advanced
* by one page (to allow for the guard page maintained in the
* C runtime) and then by TCL_WIN_STACK_THRESHOLD (to allow
* for the amount of stack that Tcl needs).
*/
tsdPtr->stackBound =
(int*) ((UINT_PTR)(mbi.AllocationBase)
+ (UINT_PTR)(si.dwPageSize)
+ TCL_WIN_STACK_THRESHOLD);
}
}
*stackBoundPtr = tsdPtr->stackBound;
return 1;
}
#endif
/*
*---------------------------------------------------------------------------
*
* 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");
tclWinProcs->getLongPathNameProc =
(DWORD (WINAPI *)(CONST TCHAR*, TCHAR*,
DWORD)) GetProcAddress(hInstance, "GetLongPathNameW");
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 = NULL;
tclWinProcs->getLongPathNameProc = NULL;
/*
* The 'findFirstFileExProc' function exists on some of
* 95/98/ME, but it seems not to work as anticipated.
* Therefore we don't set this function pointer. The relevant
* code will fall back on a slower approach using the normal
* findFirstFileProc.
*
* (HANDLE (WINAPI *)(CONST TCHAR*, UINT,
* LPVOID, UINT, LPVOID, DWORD)) GetProcAddress(hInstance,
* "FindFirstFileExA");
*/
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(void)
{
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(void)
{
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 = TclNativeDupInternalRep(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 = TclNativeDupInternalRep((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(
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(
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) {
/* do nothing */
}
#else
/*
* Don't know how to do assembly code for this compiler and/or
* architecture.
*/
#endif
return status;
}
/*
* Local Variables:
* mode: c
* c-basic-offset: 4
* fill-column: 78
* End:
*/
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