1 files changed, 110 insertions, 0 deletions
diff --git a/ports/sysdeps/unix/sysv/linux/arm/sigaction.c b/ports/sysdeps/unix/sysv/linux/arm/sigaction.c
new file mode 100644
index 0000000000..fe036c1bdc
--- /dev/null
+++ b/ports/sysdeps/unix/sysv/linux/arm/sigaction.c
@@ -0,0 +1,110 @@
+/* Copyright (C) 1997-2012 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 <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>
+
+#define SA_RESTORER	0x04000000
+
+extern void __default_sa_restorer_v1(void);
+extern void __default_sa_restorer_v2(void);
+extern void __default_rt_sa_restorer_v1(void);
+extern void __default_rt_sa_restorer_v2(void);
+#ifdef __ASSUME_SIGFRAME_V2
+# define __default_sa_restorer __default_sa_restorer_v2
+# define __default_rt_sa_restorer __default_rt_sa_restorer_v2
+#else
+# include <ldsodefs.h>
+# define __default_sa_restorer (GLRO(dl_osversion) >= 0x020612	\
+				 ? __default_sa_restorer_v2	\
+				 : __default_sa_restorer_v1)
+# define __default_rt_sa_restorer (GLRO(dl_osversion) >= 0x020612	\
+				    ? __default_rt_sa_restorer_v2	\
+				    : __default_rt_sa_restorer_v1)
+#endif
+
+/* When RT signals are in use we need to use a different return stub.  */
+#define choose_restorer(flags)					\
+  (flags & SA_SIGINFO) ? __default_rt_sa_restorer		\
+  : __default_sa_restorer
+
+/* 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;
+{
+  int result;
+
+  struct kernel_sigaction kact, koact;
+
+  if (act)
+    {
+      kact.k_sa_handler = act->sa_handler;
+      memcpy (&kact.sa_mask, &act->sa_mask, sizeof (sigset_t));
+      kact.sa_flags = act->sa_flags;
+#ifdef HAVE_SA_RESTORER
+      if (kact.sa_flags & SA_RESTORER)
+	kact.sa_restorer = act->sa_restorer;
+      else
+	{
+	  kact.sa_restorer = choose_restorer (kact.sa_flags);
+	  kact.sa_flags |= 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, _NSIG / 8);
+
+  if (oact && result >= 0)
+    {
+      oact->sa_handler = koact.k_sa_handler;
+      memcpy (&oact->sa_mask, &koact.sa_mask, sizeof (sigset_t));
+      oact->sa_flags = koact.sa_flags;
+#ifdef HAVE_SA_RESTORER
+      oact->sa_restorer = koact.sa_restorer;
+#endif
+    }
+  return result;
+}
+libc_hidden_def (__libc_sigaction)
+
+#ifdef WRAPPER_INCLUDE
+# include WRAPPER_INCLUDE
+#endif
+
+#ifndef LIBC_SIGACTION
+weak_alias (__libc_sigaction, __sigaction)
+libc_hidden_weak (__sigaction)
+weak_alias (__libc_sigaction, sigaction)
+#endif