[mirror_ubuntu-artful-kernel.git] / arch / sh / include / asm / stackprotector.h

#ifndef __ASM_SH_STACKPROTECTOR_H
#define __ASM_SH_STACKPROTECTOR_H

#include <linux/random.h>
#include <linux/version.h>

extern unsigned long __stack_chk_guard;

/*
 * Initialize the stackprotector canary value.
 *
 * NOTE: this must only be called from functions that never return,
 * and it must always be inlined.
 */
static __always_inline void boot_init_stack_canary(void)
{
	unsigned long canary;

	/* Try to get a semi random initial value. */
	get_random_bytes(&canary, sizeof(canary));
	canary ^= LINUX_VERSION_CODE;
	canary &= CANARY_MASK;

	current->stack_canary = canary;
	__stack_chk_guard = current->stack_canary;
}

#endif /* __ASM_SH_STACKPROTECTOR_H */
Commit	Line	Data
5d920bb9 FA	1	#ifndef __ASM_SH_STACKPROTECTOR_H
	2	#define __ASM_SH_STACKPROTECTOR_H
	3
	4	#include <linux/random.h>
	5	#include <linux/version.h>
	6
	7	extern unsigned long __stack_chk_guard;
	8
	9	/*
	10	* Initialize the stackprotector canary value.
	11	*
	12	* NOTE: this must only be called from functions that never return,
	13	* and it must always be inlined.
	14	*/
	15	static __always_inline void boot_init_stack_canary(void)
	16	{
	17	unsigned long canary;
	18
	19	/* Try to get a semi random initial value. */
	20	get_random_bytes(&canary, sizeof(canary));
	21	canary ^= LINUX_VERSION_CODE;
2c8340ed	22	canary &= CANARY_MASK;
5d920bb9 FA	23
	24	current->stack_canary = canary;
	25	__stack_chk_guard = current->stack_canary;
	26	}
	27
	28	#endif /* __ASM_SH_STACKPROTECTOR_H */