initial import

sysdeps/unix/bsd/ultrix4/mips/sigtramp.c

@@ -0,0 +1,55 @@
+/* Copyright (C) 1992 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 Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+/* The sigvec system call on MIPS Ultrix takes an additional
+   parameter, which is the address that is actually called when the
+   signal occurs.
+
+   When a signal occurs, we arrange for the kernel to call __handler.
+   That will save the frame and stack pointers into the context, and
+   then jump to this routine.  See __handler.S.
+
+   This code is based on sysdeps/unix/bsd/sun4/sigtramp.c, but it's
+   different because since we get passed the user signal handler we
+   don't actually need a trampoline.  */
+
+#include <ansidecl.h>
+#include <signal.h>
+#include <stddef.h>
+#include <errno.h>
+
+/* The user's signal handler is called with three arguments.  */
+typedef void (*handler_type) (int sig, int code, struct sigcontext *);
+
+/* Defined in __raw_sigvec.S.  */
+extern int EXFUN(__raw_sigvec, (int sig, CONST struct sigvec *vec,
+				struct sigvec *ovec,
+				void (*)(int sig, int code,
+					 struct sigcontext *,
+					 handler_type)));
+
+extern void EXFUN(__handler, (int sig, int code,
+			      struct sigcontext *,
+			      handler_type));
+
+int
+DEFUN(__sigvec, (sig, vec, ovec),
+      int sig AND CONST struct sigvec *vec AND struct sigvec *ovec)
+{
+  return __raw_sigvec (sig, vec, ovec, __handler);
+}