diff options
Diffstat (limited to 'win/tclWin32Dll.c')
| -rw-r--r-- | win/tclWin32Dll.c | 1181 |
1 files changed, 617 insertions, 564 deletions
diff --git a/win/tclWin32Dll.c b/win/tclWin32Dll.c index 4fd234c..6c863b9 100644 --- a/win/tclWin32Dll.c +++ b/win/tclWin32Dll.c @@ -1,20 +1,31 @@ -/* +/* * tclWin32Dll.c -- * - * This file contains the DLL entry point. + * 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. + * See the file "license.terms" for information on usage and redistribution of + * this file, and for a DISCLAIMER OF ALL WARRANTIES. */ #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. + * 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, @@ -26,41 +37,38 @@ typedef BOOL (WINAPI UTREGISTER)(HANDLE hModule, LPCSTR SixteenBitDLL, 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. +/* + * 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. + * 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; + 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 + * 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 + +#if defined(_MSC_VER) && (_MSC_VER <= 1100) +#define cpuid __asm __emit 0fh __asm __emit 0a2h #endif /* @@ -76,10 +84,10 @@ static TclWinProcs asciiProcs = { (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 *, + (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 *, + (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, @@ -87,33 +95,35 @@ static TclWinProcs asciiProcs = { (BOOL (WINAPI *)(WCHAR *, LPDWORD)) GetComputerNameA, (DWORD (WINAPI *)(DWORD, WCHAR *)) GetCurrentDirectoryA, (DWORD (WINAPI *)(CONST TCHAR *)) GetFileAttributesA, - (DWORD (WINAPI *)(CONST TCHAR *, DWORD nBufferLength, WCHAR *, + (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, + (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, + (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, + (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. + * 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, - (int (__cdecl*)(CONST TCHAR *, struct _utimbuf *)) _utime, + /* deleted (int (__cdecl*)(CONST TCHAR *, struct _utimbuf *)) _utime, */ NULL, NULL, /* getLongPathNameProc */ @@ -122,7 +132,8 @@ static TclWinProcs asciiProcs = { 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 *)(HANDLE, const VOID*, DWORD, LPDWORD, LPVOID)) WriteConsoleA, + (BOOL (WINAPI *)(LPTSTR, LPDWORD)) GetUserNameA }; static TclWinProcs unicodeProcs = { @@ -132,10 +143,10 @@ static TclWinProcs unicodeProcs = { (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 *, + (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 *, + (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, @@ -143,33 +154,35 @@ static TclWinProcs unicodeProcs = { (BOOL (WINAPI *)(WCHAR *, LPDWORD)) GetComputerNameW, (DWORD (WINAPI *)(DWORD, WCHAR *)) GetCurrentDirectoryW, (DWORD (WINAPI *)(CONST TCHAR *)) GetFileAttributesW, - (DWORD (WINAPI *)(CONST TCHAR *, DWORD nBufferLength, WCHAR *, + (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, + (UINT (WINAPI *)(CONST TCHAR *, CONST TCHAR *, UINT uUnique, WCHAR *)) GetTempFileNameW, (DWORD (WINAPI *)(DWORD, WCHAR *)) GetTempPathW, - (BOOL (WINAPI *)(CONST TCHAR *, WCHAR *, DWORD, LPDWORD, LPDWORD, LPDWORD, + (BOOL (WINAPI *)(CONST TCHAR *, WCHAR *, DWORD, LPDWORD, LPDWORD, LPDWORD, WCHAR *, DWORD)) GetVolumeInformationW, - (HINSTANCE (WINAPI *)(const TCHAR *, HANDLE, DWORD)) LoadLibraryExW, + (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, + (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. + * 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, - (int (__cdecl*)(CONST TCHAR *, struct _utimbuf *)) _wutime, + /* deleted (int (__cdecl*)(CONST TCHAR *, struct _utimbuf *)) _wutime, */ NULL, NULL, /* getLongPathNameProc */ @@ -178,70 +191,70 @@ static TclWinProcs unicodeProcs = { 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 *)(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. +/* + * 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)); - +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); +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). + * 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 */ + 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. +/* + * 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 */ +/* + * 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. + * This wrapper function is used by Borland to invoke the initialization + * code for Tcl. It simply calls the DllMain routine. * * Results: * See DllMain. @@ -253,10 +266,10 @@ extern Tcl_FSDupInternalRepProc TclNativeDupInternalRep; */ BOOL APIENTRY -DllEntryPoint(hInst, reason, reserved) - HINSTANCE hInst; /* Library instance handle. */ - DWORD reason; /* Reason this function is being called. */ - LPVOID reserved; /* Not used. */ +DllEntryPoint( + HINSTANCE hInst, /* Library instance handle. */ + DWORD reason, /* Reason this function is being called. */ + LPVOID reserved) /* Not used. */ { return DllMain(hInst, reason, reserved); } @@ -266,25 +279,29 @@ DllEntryPoint(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. + * 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. + * 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(hInst, reason, reserved) - HINSTANCE hInst; /* Library instance handle. */ - DWORD reason; /* Reason this function is being called. */ - LPVOID reserved; /* Not used. */ +DllMain( + HINSTANCE hInst, /* Library instance handle. */ + DWORD reason, /* Reason this function is being called. */ + LPVOID reserved) /* Not used. */ { -#ifdef HAVE_NO_SEH +#if defined(HAVE_NO_SEH) && !defined(_WIN64) EXCEPTION_REGISTRATION registration; #endif @@ -296,91 +313,97 @@ DllMain(hInst, reason, reserved) 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. + * 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 */ + +#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; + return TRUE; } - #endif /* !STATIC_BUILD */ #endif /* __WIN32__ */ @@ -401,7 +424,7 @@ DllMain(hInst, reason, reserved) */ HINSTANCE -TclWinGetTclInstance() +TclWinGetTclInstance(void) { return hInstance; } @@ -423,8 +446,8 @@ TclWinGetTclInstance() */ void -TclWinInit(hInst) - HINSTANCE hInst; /* Library instance handle. */ +TclWinInit( + HINSTANCE hInst) /* Library instance handle. */ { OSVERSIONINFO os; @@ -434,12 +457,12 @@ TclWinInit(hInst) platformId = os.dwPlatformId; /* - * We no longer support Win32s, so just in case someone manages to - * get a runtime there, make sure they know that. + * 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"); + Tcl_Panic("Win32s is not a supported platform"); } tclWinProcs = &asciiProcs; @@ -450,14 +473,14 @@ TclWinInit(hInst) * * TclWinGetPlatformId -- * - * Determines whether running under NT, 95, or Win32s, to allow - * runtime conditional code. + * 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 + * VER_PLATFORM_WIN32_WINDOWS Win32 on Windows 95, 98, ME. + * VER_PLATFORM_WIN32_NT Win32 on Windows NT, 2000, XP * * Side effects: * None. @@ -465,8 +488,8 @@ TclWinInit(hInst) *---------------------------------------------------------------------- */ -int -TclWinGetPlatformId() +int +TclWinGetPlatformId(void) { return platformId; } @@ -505,161 +528,93 @@ TclWinNoBackslash( /* *---------------------------------------------------------------------- * - * TclpCheckStackSpace -- + * TclpGetStackParams -- * - * Detect if we are about to blow the stack. Called before an - * evaluation can happen when nesting depth is checked. + * 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: - * 1 if there is enough stack space to continue; 0 if not. - * - * Side effects: - * None. + * 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 -TclpCheckStackSpace() +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. + */ -#ifdef HAVE_NO_SEH - EXCEPTION_REGISTRATION registration; -#endif - int retval = 0; + GetSystemInfo(&si); + if (VirtualQuery((LPCVOID) &tsdPtr, &mbi, sizeof(mbi)) == 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. - */ + /* 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. */ -#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 */ + if (!tsdPtr->stackBound) { + tsdPtr->stackBound = + (int*) ((UINT_PTR)(&tsdPtr) + & ~ (UINT_PTR)(si.dwPageSize - 1)); + } - 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. - * - *---------------------------------------------------------------------- - */ + } else { -TclPlatformType * -TclWinGetPlatform() -{ - return &tclPlatform; + /* 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). + * 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. @@ -683,21 +638,25 @@ TclWinSetInterfaces( 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->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"); @@ -737,22 +696,31 @@ TclWinSetInterfaces( 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->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; - tclWinProcs->getVolumeNameForVMPProc = - (BOOL (WINAPI *)(CONST TCHAR*, TCHAR*, - DWORD)) GetProcAddress(hInstance, - "GetVolumeNameForVolumeMountPointA"); + /* + * 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); } } @@ -764,15 +732,14 @@ TclWinSetInterfaces( * * 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. + * 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. * - * 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. * @@ -781,17 +748,22 @@ TclWinSetInterfaces( * *--------------------------------------------------------------------------- */ + void -TclWinResetInterfaceEncodings() +TclWinResetInterfaceEncodings(void) { MountPointMap *dlIter, *dlIter2; if (tclWinTCharEncoding != NULL) { Tcl_FreeEncoding(tclWinTCharEncoding); tclWinTCharEncoding = NULL; } - /* Clean up the mount point map */ + + /* + * Clean up the mount point map. + */ + Tcl_MutexLock(&mountPointMap); - dlIter = driveLetterLookup; + dlIter = driveLetterLookup; while (dlIter != NULL) { dlIter2 = dlIter->nextPtr; ckfree((char*)dlIter->volumeName); @@ -807,8 +779,8 @@ TclWinResetInterfaceEncodings() * 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. + * 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. @@ -819,7 +791,7 @@ TclWinResetInterfaceEncodings() *--------------------------------------------------------------------------- */ void -TclWinResetInterfaces() +TclWinResetInterfaces(void) { tclWinProcs = &asciiProcs; } @@ -829,64 +801,76 @@ TclWinResetInterfaces() * * 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. - * + * 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) + +char +TclWinDriveLetterForVolMountPoint( + CONST WCHAR *mountPoint) { MountPointMap *dlIter, *dlPtr2; - WCHAR Target[55]; /* Target of mount at mount point */ + 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. + + /* + * 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; + 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. + /* + * 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) { + + /* + * 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 */ + /* + * Nothing has changed. + */ + Tcl_MutexUnlock(&mountPointMap); return dlIter->driveLetter; } } - /* - * If we reach here, unfortunately, this mount point is - * no longer valid at all + + /* + * 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) { + for (dlPtr2 = driveLetterLookup; + dlPtr2 != NULL; dlPtr2 = dlPtr2->nextPtr) { if (dlPtr2->nextPtr == dlIter) { dlPtr2->nextPtr = dlIter->nextPtr; dlPtr2 = dlIter; @@ -894,36 +878,48 @@ TclWinDriveLetterForVolMountPoint(CONST WCHAR *mountPoint) } } } - /* Now dlPtr2 points to the structure to free */ + + /* + * 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 + + /* + * 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 */ - + + /* + * 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) { + /* + * 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) { + + 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 = (MountPointMap *) ckalloc(sizeof(MountPointMap)); dlPtr2->volumeName = TclNativeDupInternalRep(Target); dlPtr2->driveLetter = 'A' + (drive[0] - L'A'); dlPtr2->nextPtr = driveLetterLookup; @@ -931,19 +927,24 @@ TclWinDriveLetterForVolMountPoint(CONST WCHAR *mountPoint) } } } - /* Try again */ - for (dlIter = driveLetterLookup; dlIter != NULL; - dlIter = dlIter->nextPtr) { + + /* + * 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. + + /* + * 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; @@ -958,26 +959,24 @@ TclWinDriveLetterForVolMountPoint(CONST WCHAR *mountPoint) * * Tcl_WinUtfToTChar, Tcl_WinTCharToUtf -- * - * Convert between UTF-8 and Unicode when running Windows NT or - * the current ANSI code page when running Windows 95. + * 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 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: + * 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"); @@ -987,19 +986,17 @@ TclWinDriveLetterForVolMountPoint(CONST WCHAR *mountPoint) * 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. + * 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. + * 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. @@ -1008,27 +1005,27 @@ TclWinDriveLetterForVolMountPoint(CONST WCHAR *mountPoint) */ TCHAR * -Tcl_WinUtfToTChar(string, len, dsPtr) - CONST char *string; /* Source string in UTF-8. */ - int len; /* Source string length in bytes, or < 0 for +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. */ + Tcl_DString *dsPtr) /* Uninitialized or free DString in which the + * converted string is stored. */ { - return (TCHAR *) Tcl_UtfToExternalDString(tclWinTCharEncoding, + 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 +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. */ + Tcl_DString *dsPtr) /* Uninitialized or free DString in which the + * converted string is stored. */ { - return Tcl_ExternalToUtfDString(tclWinTCharEncoding, + return Tcl_ExternalToUtfDString(tclWinTCharEncoding, (CONST char *) string, len, dsPtr); } @@ -1040,109 +1037,149 @@ Tcl_WinTCharToUtf(string, len, dsPtr) * 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. + * 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' + * 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 */ +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) +#if defined(__GNUC__) +# if defined(_WIN64) + /* + * Execute the CPUID instruction with the given index, and store results + * off 'regsPtr'. + */ - /* - * Execute the CPUID instruction with the given index, and - * store results off 'regPtr'. + __asm__ __volatile__( + /* + * 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" + + : + /* No outputs */ + : + [index] "m" (index), + [rptr] "m" (regsPtr) + : + "%eax", "%ebx", "%ecx", "%edx", "%esi", "%edi", "memory"); + status = TCL_OK; + +# else + + EXCEPTION_REGISTRATION registration; + + /* + * 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" ); + + __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) +# endif /* !_WIN64 */ +#elif defined(_MSC_VER) +# if defined(_WIN64) + + __cpuid(regsPtr, index); + status = TCL_OK; - /* Define a structure in the stack frame to hold the registers */ +# else + /* + * Define a structure in the stack frame to hold the registers. + */ struct { DWORD dw0; @@ -1151,39 +1188,55 @@ TclWinCPUID( unsigned int index, /* Which CPUID value to retrieve */ DWORD dw3; } regs; regs.dw0 = index; - - /* Execute the CPUID instruction and save regs in the stack frame */ + + /* + * Execute the CPUID instruction and save regs in the stack frame. + */ _try { _asm { push ebx push ecx push edx - mov eax, regs.dw0 + 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 + 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; + /* + * 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 ) { + } __except(EXCEPTION_EXECUTE_HANDLER) { + /* do nothing */ } +# endif #else - /* Don't know how to do assembly code for - * this compiler and/or architecture */ + /* + * 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: + */ |