kernel32: Add an x86_64 implementation for the TEB access functions.

dlls/kernel32/thread.c

@@ -602,7 +602,39 @@ __ASM_STDCALL_FUNC( GetCurrentThreadId, 0, ".byte 0x64\n\tmovl 0x24,%eax\n\tret"
 /* HANDLE WINAPI GetProcessHeap(void) */
 __ASM_STDCALL_FUNC( GetProcessHeap, 0, ".byte 0x64\n\tmovl 0x30,%eax\n\tmovl 0x18(%eax),%eax\n\tret");
 
-#else  /* __i386__ */
+#elif defined(__x86_64__)
+
+/***********************************************************************
+ *		SetLastError (KERNEL32.@)
+ */
+/* void WINAPI SetLastError( DWORD error ); */
+__ASM_STDCALL_FUNC( SetLastError, 8, ".byte 0x65\n\tmovl %ecx,0x68\n\tret" );
+
+/***********************************************************************
+ *		GetLastError (KERNEL32.@)
+ */
+/* DWORD WINAPI GetLastError(void); */
+__ASM_STDCALL_FUNC( GetLastError, 0, ".byte 0x65\n\tmovl 0x68,%eax\n\tret" );
+
+/***********************************************************************
+ *		GetCurrentProcessId (KERNEL32.@)
+ */
+/* DWORD WINAPI GetCurrentProcessId(void) */
+__ASM_STDCALL_FUNC( GetCurrentProcessId, 0, ".byte 0x65\n\tmovl 0x40,%eax\n\tret" );
+
+/***********************************************************************
+ *		GetCurrentThreadId (KERNEL32.@)
+ */
+/* DWORD WINAPI GetCurrentThreadId(void) */
+__ASM_STDCALL_FUNC( GetCurrentThreadId, 0, ".byte 0x65\n\tmovl 0x48,%eax\n\tret" );
+
+/***********************************************************************
+ *		GetProcessHeap (KERNEL32.@)
+ */
+/* HANDLE WINAPI GetProcessHeap(void) */
+__ASM_STDCALL_FUNC( GetProcessHeap, 0, ".byte 0x65\n\tmovq 0x60,%rax\n\tmovq 0x30(%rax),%rax\n\tret");
+
+#else  /* __x86_64__ */
 
 /**********************************************************************
  *		SetLastError (KERNEL32.@)