Move m68k from ports to libc

sysdeps/unix/sysv/linux/m68k/sysdep.S

@@ -0,0 +1,50 @@
+/* Copyright (C) 1996-2014 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <sysdep.h>
+
+
+/* The following code is only used in the shared library when we
+   compile the reentrant version.  Otherwise each system call defines
+   each own version.  */
+
+#ifndef	PIC
+
+/* The syscall stubs jump here when they detect an error.  */
+
+#undef CALL_MCOUNT
+#define CALL_MCOUNT /* Don't insert the profiling call, it clobbers %d0.  */
+
+	.text
+ENTRY (__syscall_error)
+	neg.l %d0
+#ifndef _LIBC_REENTRANT
+	move.l %d0, errno
+#else
+	move.l %d0, -(%sp)
+	cfi_adjust_cfa_offset (4)
+	jbsr __errno_location
+	move.l (%sp)+, (%a0)
+	cfi_adjust_cfa_offset (-4)
+#endif
+	move.l #-1, %d0
+	/* Copy return value to %a0 for syscalls that are declared to
+	   return a pointer.  */
+	move.l %d0, %a0
+	rts
+END (__syscall_error)
+#endif /* PIC */