FreeBSD/Linux Kernel Cross Reference
sys/sys/pax.h
1 /* $NetBSD: pax.h,v 1.11 2007/12/27 15:21:53 elad Exp $ */
2
3 /*-
4 * Copyright (c) 2006 Elad Efrat <elad@NetBSD.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30 #ifndef _SYS_PAX_H_
31 #define _SYS_PAX_H_
32
33 #include <uvm/uvm_extern.h>
34
35 struct lwp;
36 struct exec_package;
37 struct vmspace;
38
39 #ifdef PAX_ASLR
40 /*
41 * We stick this here because we need it in kern/exec_elf32.c for now.
42 */
43 #ifndef PAX_ASLR_DELTA_EXEC_LEN
44 #define PAX_ASLR_DELTA_EXEC_LEN 12
45 #endif
46 #endif /* PAX_ASLR */
47
48 void pax_init(void);
49 void pax_adjust(struct lwp *, uint32_t);
50
51 void pax_mprotect(struct lwp *, vm_prot_t *, vm_prot_t *);
52 int pax_segvguard(struct lwp *, struct vnode *, const char *, bool);
53
54 #define PAX_ASLR_DELTA(delta, lsb, len) \
55 (((delta) & ((1UL << (len)) - 1)) << (lsb))
56 bool pax_aslr_active(struct lwp *);
57 void pax_aslr_init(struct lwp *, struct vmspace *);
58 void pax_aslr_stack(struct lwp *, struct exec_package *, u_long *);
59 void pax_aslr(struct lwp *, vaddr_t *, vaddr_t, int);
60
61 #endif /* !_SYS_PAX_H_ */
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