1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/libsystypes/lib/src/base.c Mon Feb 13 16:56:59 2023 +0100
1.3 @@ -0,0 +1,42 @@
1.4 +/*
1.5 + * Utility functions for base types.
1.6 + *
1.7 + * Copyright (C) 2022, 2023 Paul Boddie <paul@boddie.org.uk>
1.8 + *
1.9 + * This program is free software; you can redistribute it and/or
1.10 + * modify it under the terms of the GNU General Public License as
1.11 + * published by the Free Software Foundation; either version 2 of
1.12 + * the License, or (at your option) any later version.
1.13 + *
1.14 + * This program is distributed in the hope that it will be useful,
1.15 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
1.16 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1.17 + * GNU General Public License for more details.
1.18 + *
1.19 + * You should have received a copy of the GNU General Public License
1.20 + * along with this program; if not, write to the Free Software
1.21 + * Foundation, Inc., 51 Franklin Street, Fifth Floor,
1.22 + * Boston, MA 02110-1301, USA
1.23 + */
1.24 +
1.25 +#include <l4/re/c/dataspace.h>
1.26 +
1.27 +#include "base.h"
1.28 +
1.29 +
1.30 +
1.31 +/* Return mapping flags corresponding to page fault flags. */
1.32 +
1.33 +map_flags_t map_flags_for_fault(l4_umword_t flags)
1.34 +{
1.35 + map_flags_t map_flags = (flags & 4 ? L4RE_DS_F_RX : 0) |
1.36 + (flags & 2 ? L4RE_DS_F_W : 0) |
1.37 + (flags & 1 ? L4RE_DS_F_R : 0);
1.38 +
1.39 + if (!map_flags)
1.40 + map_flags = L4RE_DS_F_R;
1.41 +
1.42 + return map_flags;
1.43 +}
1.44 +
1.45 +// vim: tabstop=2 expandtab shiftwidth=2