1 /* SPDX-License-Identifier: GPL-2.0 */ 1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_STACKPROTECTOR_H 2 #ifndef _LINUX_STACKPROTECTOR_H
3 #define _LINUX_STACKPROTECTOR_H 1 3 #define _LINUX_STACKPROTECTOR_H 1
4 4
5 #include <linux/compiler.h> 5 #include <linux/compiler.h>
6 #include <linux/sched.h> 6 #include <linux/sched.h>
7 #include <linux/random.h> 7 #include <linux/random.h>
8 8
9 /* !! 9 #ifdef CONFIG_STACKPROTECTOR
10 * On 64-bit architectures, protect against no <<
11 * by zeroing out the first byte of the canary <<
12 */ <<
13 #ifdef CONFIG_64BIT <<
14 # ifdef __LITTLE_ENDIAN <<
15 # define CANARY_MASK 0xffffffffffffff00UL <<
16 # else /* big endian, 64 bits: */ <<
17 # define CANARY_MASK 0x00ffffffffffffffUL <<
18 # endif <<
19 #else /* 32 bits: */ <<
20 # define CANARY_MASK 0xffffffffUL <<
21 #endif <<
22 <<
23 static inline unsigned long get_random_canary( <<
24 { <<
25 return get_random_long() & CANARY_MASK <<
26 } <<
27 <<
28 #if defined(CONFIG_STACKPROTECTOR) || defined( <<
29 # include <asm/stackprotector.h> 10 # include <asm/stackprotector.h>
30 #else 11 #else
31 static inline void boot_init_stack_canary(void 12 static inline void boot_init_stack_canary(void)
32 { 13 {
33 } 14 }
34 #endif 15 #endif
35 16
36 #endif 17 #endif
37 18
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