1 files changed, 46 insertions, 0 deletions
diff --git a/sysdeps/mach/hurd/sigstack.c b/sysdeps/mach/hurd/sigstack.c
new file mode 100644
index 0000000000..77803ab012
--- /dev/null
+++ b/sysdeps/mach/hurd/sigstack.c
@@ -0,0 +1,46 @@
+/* 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.  */
+
+#include <ansidecl.h>
+#include <errno.h>
+#include <signal.h>
+#include <hurd.h>
+
+/* Run signals handlers on the stack specified by SS (if not NULL).
+   If OSS is not NULL, it is filled in with the old signal stack status.  */
+int
+DEFUN(sigstack, (ss, oss),
+      CONST struct sigstack *ss AND struct sigstack *oss)
+{
+  struct sigaltstack as, oas;
+
+  as.ss_sp = ss->ss_sp;
+  as.ss_size = 0;
+  as.ss_flags = 0;
+
+  if (sigaltstack (&as, &oas) < 0)
+    return -1;
+
+  if (oss != NULL)
+    {
+      oss->ss_sp = oas.ss_sp;
+      oss->ss_onstack = oas.ss_flags & SA_ONSTACK;
+    }
+
+  return 0;
+}