1 files changed, 80 insertions, 0 deletions
diff --git a/ports/sysdeps/unix/sysv/linux/aarch64/sigaction.c b/ports/sysdeps/unix/sysv/linux/aarch64/sigaction.c
new file mode 100644
index 0000000000..74b6675647
--- /dev/null
+++ b/ports/sysdeps/unix/sysv/linux/aarch64/sigaction.c
@@ -0,0 +1,80 @@
+/* Copyright (C) 1997-2013 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>
+
+#define SA_RESTORER	0x04000000
+
+/* 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>
+
+int
+__libc_sigaction (int sig, const struct sigaction *act, struct sigaction *oact)
+{
+  int result;
+  struct kernel_sigaction kact;
+  struct kernel_sigaction 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;
+#endif
+    }
+
+  result = INLINE_SYSCALL (rt_sigaction, 4, sig,
+			   act ? __ptrvalue (&kact) : NULL,
+			   oact ? __ptrvalue (&koact) : NULL, _NSIG / 8);
+  if (result >= 0 || errno != ENOSYS)
+    {
+      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