1/* $NetBSD: exec_prot.h,v 1.1 2011/07/18 23:16:11 jym Exp $ */
2
3/*-
4 * Copyright (c) 2011 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jean-Yves Migeon.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#ifndef _TESTS_EXEC_PROT_H_
33#define _TESTS_EXEC_PROT_H_
34
35/*
36 * Prototype definitions of external helper functions for executable
37 * mapping tests.
38 */
39
40/*
41 * Trivial MD shellcode that justs returns 1.
42 */
43int return_one(void);     /* begin marker -- shellcode entry */
44int return_one_end(void); /* end marker */
45
46/*
47 * MD callback to verify whether host offers executable space protection.
48 * Returns execute protection level.
49 */
50int exec_prot_support(void);
51
52/* execute protection level */
53enum {
54	NOTIMPL = -1, /* callback not implemented */
55	NO_XP,        /* no execute protection */
56	PERPAGE_XP,   /* per-page execute protection */
57	PARTIAL_XP    /* partial execute protection. Depending on where the
58			 page is located in virtual memory, executable space
59			 protection may be enforced or not. */
60};
61#endif
62