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/* 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);
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