blob: 8c44233016ca5cc3a5fd4eeadd9e5b227e8b9f2f (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
/* Copyright (C) 2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library 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 2.1 of the
License, or (at your option) any later version.
The GNU C Library 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 the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#ifndef _AARCH64_MORELLO_CHERI_PERMS_H
#define _AARCH64_MORELLO_CHERI_PERMS_H
/* Capability permission bits. These are defined in the Arm Architecture
Reference Manual Suplement- Morello for A-Profile Architecture:
https://developer.arm.com/documentation/ddi0606/latest */
#define CAP_PERM_LOAD (1 << 17)
#define CAP_PERM_STORE (1 << 16)
#define CAP_PERM_EXECUTE (1 << 15)
#define CAP_PERM_LOAD_CAP (1 << 14)
#define CAP_PERM_STORE_CAP (1 << 13)
#define CAP_PERM_STORE_LOCAL (1 << 12)
#define CAP_PERM_SEAL (1 << 11)
#define CAP_PERM_UNSEAL (1 << 10)
#define CAP_PERM_COMPARTMENT_ID (1 << 7)
#define CAP_PERM_MUTABLE_LOAD (1 << 6)
#define CAP_PERM_EXECUTIVE (1 << 1)
#define CAP_PERM_GLOBAL (1 << 0)
/* Used with __builtin_cheri_perms_and. */
#define CAP_PERM_MASK_BASE (-1UL ^ ( \
CAP_PERM_LOAD | \
CAP_PERM_STORE | \
CAP_PERM_EXECUTE | \
CAP_PERM_LOAD_CAP | \
CAP_PERM_STORE_CAP | \
CAP_PERM_SEAL | \
CAP_PERM_UNSEAL | \
CAP_PERM_COMPARTMENT_ID))
#define CAP_PERM_MASK_R (CAP_PERM_MASK_BASE | CAP_PERM_LOAD | CAP_PERM_LOAD_CAP)
#define CAP_PERM_MASK_RW (CAP_PERM_MASK_R | CAP_PERM_STORE | CAP_PERM_STORE_CAP)
#define CAP_PERM_MASK_RX (CAP_PERM_MASK_R | CAP_PERM_EXECUTE)
#define STACK_CAP_PERM_PCS ( \
CAP_PERM_LOAD | \
CAP_PERM_STORE | \
CAP_PERM_LOAD_CAP | \
CAP_PERM_STORE_CAP | \
CAP_PERM_MUTABLE_LOAD)
/* Check if stack is valid according to stack PCS rules. Only permissions
are checked, seal and invalid tag cause fault on access. */
#define STACK_CAP_CHECK(stack, size) \
({unsigned long __perm = __builtin_cheri_perms_get (stack); \
(__perm & (CAP_PERM_GLOBAL|CAP_PERM_STORE_LOCAL)) \
&& (__perm & STACK_CAP_PERM_PCS) == STACK_CAP_PERM_PCS;})
#endif
|
