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-rw-r--r--sysdeps/unix/sysv/linux/mips/sigaction.c139
1 files changed, 139 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/mips/sigaction.c b/sysdeps/unix/sysv/linux/mips/sigaction.c
new file mode 100644
index 0000000000..36265d1891
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/mips/sigaction.c
@@ -0,0 +1,139 @@
+/* Copyright (C) 1997, 1998, 1999, 2000 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., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.	*/
+
+#include <errno.h>
+#include <signal.h>
+#include <string.h>
+
+#include <sysdep.h>
+#include <sys/syscall.h>
+
+#include "kernel-features.h"
+
+/* The difference here is that the sigaction structure used in the
+   kernel is not the same as we use in the libc.  Therefore we must
+   translate it here.  */
+#include <kernel_sigaction.h>
+
+#if __ASSUME_REALTIME_SIGNALS == 0
+/* The variable is shared between all wrappers around signal handling
+   functions which have RT equivalents.	 This is the definition.  */
+int __libc_missing_rt_sigs;
+
+extern int __syscall_sigaction (int, const struct old_kernel_sigaction *__unbounded,
+				struct old_kernel_sigaction *__unbounded);
+#endif
+extern int __syscall_rt_sigaction (int, const struct kernel_sigaction *__unbounded,
+				   struct kernel_sigaction *__unbounded, size_t);
+
+
+/* If ACT is not NULL, change the action for SIG to *ACT.
+   If OACT is not NULL, put the old action for SIG in *OACT.  */
+int
+__libc_sigaction (sig, act, oact)
+     int sig;
+     const struct sigaction *act;
+     struct sigaction *oact;
+{
+#if __ASSUME_REALTIME_SIGNALS == 0
+  struct old_kernel_sigaction k_sigact, k_osigact;
+#endif
+  int result;
+
+#if defined __NR_rt_sigaction || __ASSUME_REALTIME_SIGNALS > 0
+  /* First try the RT signals.	*/
+# if __ASSUME_REALTIME_SIGNALS == 0
+  if (!__libc_missing_rt_sigs)
+# endif
+    {
+      struct kernel_sigaction kact, koact;
+      /* Save the current error value for later.  We need not do this
+	 if we are guaranteed to have realtime signals.	 */
+# if __ASSUME_REALTIME_SIGNALS == 0
+      int saved_errno = errno;
+# endif
+
+      if (act)
+	{
+	  kact.k_sa_handler = act->sa_handler;
+	  memcpy (&kact.sa_mask, &act->sa_mask, sizeof (kernel_sigset_t));
+	  kact.sa_flags = act->sa_flags;
+# ifdef HAVE_SA_RESTORER
+	  kact.sa_restorer = act->sa_restorer;
+# endif
+	}
+
+      /* XXX The size argument hopefully will have to be changed to the
+	 real size of the user-level sigset_t.	*/
+      result = INLINE_SYSCALL (rt_sigaction, 4, sig,
+			       act ? __ptrvalue (&kact) : NULL,
+			       oact ? __ptrvalue (&koact) : NULL,
+			       sizeof (kernel_sigset_t));
+
+# if __ASSUME_REALTIME_SIGNALS == 0
+      if (result >= 0 || errno != ENOSYS)
+# endif
+	{
+	  if (oact && result >= 0)
+	    {
+	      oact->sa_handler = koact.k_sa_handler;
+	      memcpy (&oact->sa_mask, &koact.sa_mask,
+				sizeof (kernel_sigset_t));
+	      oact->sa_flags = koact.sa_flags;
+# ifdef HAVE_SA_RESTORER
+	      oact->sa_restorer = koact.sa_restorer;
+# endif
+	    }
+	  return result;
+	}
+
+# if __ASSUME_REALTIME_SIGNALS == 0
+      __set_errno (saved_errno);
+      __libc_missing_rt_sigs = 1;
+# endif
+    }
+#endif
+
+#if __ASSUME_REALTIME_SIGNALS == 0
+  if (act)
+    {
+      k_sigact.k_sa_handler = act->sa_handler;
+      k_sigact.sa_mask = act->sa_mask.__val[0];
+      k_sigact.sa_flags = act->sa_flags;
+# ifdef HAVE_SA_RESTORER
+      k_sigact.sa_restorer = act->sa_restorer;
+# endif
+    }
+  result = INLINE_SYSCALL (sigaction, 3, sig,
+			   act ? __ptrvalue (&k_sigact) : NULL,
+			   oact ? __ptrvalue (&k_osigact) : NULL);
+  if (oact && result >= 0)
+    {
+      oact->sa_handler = k_osigact.k_sa_handler;
+      oact->sa_mask.__val[0] = k_osigact.sa_mask;
+      oact->sa_flags = k_osigact.sa_flags;
+# ifdef HAVE_SA_RESTORER
+      oact->sa_restorer = k_osigact.sa_restorer;
+# endif
+    }
+  return result;
+#endif
+}
+
+weak_alias (__libc_sigaction, __sigaction)
+weak_alias (__libc_sigaction, sigaction)