msvcrt: Implement _local_unwind for x86_64.

dlls/msvcr100/msvcr100.spec

@@ -844,6 +844,7 @@
 @ cdecl _lfind(ptr ptr ptr long ptr) msvcrt._lfind
 @ stub _lfind_s
 @ cdecl _loaddll(str) msvcrt._loaddll
+@ cdecl -arch=x86_64 _local_unwind(ptr ptr) msvcrt._local_unwind
 @ cdecl -i386 _local_unwind2(ptr long) msvcrt._local_unwind2
 @ cdecl -i386 _local_unwind4(ptr ptr long) msvcrt._local_unwind4
 @ cdecl _localtime32(ptr) msvcrt._localtime32

dlls/msvcr80/msvcr80.spec

@@ -690,6 +690,7 @@
 @ cdecl _lfind(ptr ptr ptr long ptr) msvcrt._lfind
 @ stub _lfind_s
 @ cdecl _loaddll(str) msvcrt._loaddll
+@ cdecl -arch=x86_64 _local_unwind(ptr ptr) msvcrt._local_unwind
 @ cdecl -i386 _local_unwind2(ptr long) msvcrt._local_unwind2
 @ cdecl -i386 _local_unwind4(ptr ptr long) msvcrt._local_unwind4
 @ cdecl _localtime32(ptr) msvcrt._localtime32

dlls/msvcr90/msvcr90.spec

@@ -678,6 +678,7 @@
 @ cdecl _lfind(ptr ptr ptr long ptr) msvcrt._lfind
 @ stub _lfind_s
 @ cdecl _loaddll(str) msvcrt._loaddll
+@ cdecl -arch=x86_64 _local_unwind(ptr ptr) msvcrt._local_unwind
 @ cdecl -i386 _local_unwind2(ptr long) msvcrt._local_unwind2
 @ cdecl -i386 _local_unwind4(ptr ptr long) msvcrt._local_unwind4
 @ cdecl _localtime32(ptr) msvcrt._localtime32

dlls/msvcrt/except.c

@@ -605,6 +605,15 @@ void __cdecl MSVCRT_longjmp( struct MSVCRT___JUMP_BUFFER *jmp, int retval )
     longjmp_set_regs( jmp, retval );
 }
 
+/*******************************************************************
+ *		_local_unwind (MSVCRT.@)
+ */
+void __cdecl _local_unwind( void *frame, void *target )
+{
+    CONTEXT context;
+    RtlUnwindEx( frame, target, NULL, 0, &context, NULL );
+}
+
 #endif /* __x86_64__ */
 
 static MSVCRT___sighandler_t sighandlers[MSVCRT_NSIG] = { MSVCRT_SIG_DFL };

dlls/msvcrt/msvcrt.spec

@@ -627,7 +627,7 @@
 @ cdecl _lfind(ptr ptr ptr long ptr)
 # stub _lfind_s(ptr ptr ptr long ptr ptr)
 @ cdecl _loaddll(str)
-# stub -arch=x86_64 _local_unwind
+@ cdecl -arch=x86_64 _local_unwind(ptr ptr)
 @ cdecl -i386 _local_unwind2(ptr long)
 @ cdecl -i386 _local_unwind4(ptr ptr long)
 @ cdecl _localtime32(ptr) MSVCRT__localtime32

dlls/msvcrtd/msvcrtd.spec

@@ -378,6 +378,7 @@
 @ cdecl _kbhit() msvcrt._kbhit
 @ cdecl _lfind(ptr ptr ptr long ptr) msvcrt._lfind
 @ cdecl _loaddll(str) msvcrt._loaddll
+@ cdecl -arch=x86_64 _local_unwind(ptr ptr) msvcrt._local_unwind
 @ cdecl -i386 _local_unwind2(ptr long) msvcrt._local_unwind2
 @ cdecl _lock(long) msvcrt._lock
 @ cdecl _locking(long long long) msvcrt._locking

dlls/ntoskrnl.exe/ntoskrnl.exe.spec

@@ -1411,7 +1411,8 @@
 @ cdecl -private -i386 _global_unwind2(ptr) msvcrt._global_unwind2
 @ cdecl -private _itoa(long ptr long) msvcrt._itoa
 @ cdecl -private _itow(long ptr long) msvcrt._itow
-@ cdecl -private _local_unwind2(ptr long) msvcrt._local_unwind2
+@ cdecl -private -arch=x86_64 _local_unwind(ptr ptr) msvcrt._local_unwind
+@ cdecl -private -arch=i386 _local_unwind2(ptr long) msvcrt._local_unwind2
 @ cdecl -private _purecall() msvcrt._purecall
 @ varargs -private _snprintf(str long str) msvcrt._snprintf
 @ varargs -private _snwprintf(wstr long wstr) msvcrt._snwprintf