1 files changed, 69 insertions, 0 deletions
diff --git a/libpthread/sysdeps/l4/hurd/sig-sysdep.h b/libpthread/sysdeps/l4/hurd/sig-sysdep.h
new file mode 100644
index 00000000..33e13857
--- /dev/null
+++ b/libpthread/sysdeps/l4/hurd/sig-sysdep.h
@@ -0,0 +1,69 @@
+/* sig-sysdep.h - Hurd system specific header file.
+   Copyright (C) 2008 Free Software Foundation, Inc.
+   Written by Neal H. Walfield <neal@gnu.org>.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd 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 3 of
+   the License, or (at your option) any later version.
+
+   The GNU Hurd 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 this program.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <l4.h>
+#include <string.h>
+
+struct utcb
+{
+  l4_word_t saved_sender;
+  l4_word_t saved_receiver;
+  l4_word_t saved_timeout;
+  l4_word_t saved_error_code;
+  l4_word_t saved_flags;
+  l4_word_t saved_br0;
+  l4_msg_t saved_message;
+};
+
+static inline void
+utcb_state_save (struct utcb *buffer)
+{
+  l4_word_t *utcb = _L4_utcb ();
+
+  buffer->saved_sender = utcb[_L4_UTCB_SENDER];
+  buffer->saved_receiver = utcb[_L4_UTCB_RECEIVER];
+  buffer->saved_timeout = utcb[_L4_UTCB_TIMEOUT];
+  buffer->saved_error_code = utcb[_L4_UTCB_ERROR_CODE];
+  buffer->saved_flags = utcb[_L4_UTCB_FLAGS];
+  buffer->saved_br0 = utcb[_L4_UTCB_BR0];
+  memcpy (&buffer->saved_message,
+	  utcb, L4_NUM_MRS * sizeof (l4_word_t));
+}
+
+static inline void
+utcb_state_restore (struct utcb *buffer)
+{
+  l4_word_t *utcb = _L4_utcb ();
+
+  utcb[_L4_UTCB_SENDER] = buffer->saved_sender;
+  utcb[_L4_UTCB_RECEIVER] = buffer->saved_receiver;
+  utcb[_L4_UTCB_TIMEOUT] = buffer->saved_timeout;
+  utcb[_L4_UTCB_ERROR_CODE] = buffer->saved_error_code;
+  utcb[_L4_UTCB_FLAGS] = buffer->saved_flags;
+  utcb[_L4_UTCB_BR0] = buffer->saved_br0;
+  memcpy (utcb, &buffer->saved_message,
+	  L4_NUM_MRS * sizeof (l4_word_t));
+}
+
+#define SIGNAL_DISPATCH_ENTRY \
+  struct utcb buffer; utcb_state_save (&buffer);
+
+#define SIGNAL_DISPATCH_EXIT \
+  utcb_state_restore (&buffer);