[linux-2.6-block.git] / arch / powerpc / include / asm / stackprotector.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * GCC stack protector support.
 *
 */

#ifndef _ASM_STACKPROTECTOR_H
#define _ASM_STACKPROTECTOR_H

#include <linux/random.h>
#include <linux/version.h>
#include <asm/reg.h>
#include <asm/current.h>
#include <asm/paca.h>

/*
 * 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. */
	canary = get_random_canary();
	canary ^= mftb();
	canary ^= LINUX_VERSION_CODE;
	canary &= CANARY_MASK;

	current->stack_canary = canary;
#ifdef CONFIG_PPC64
	get_paca()->canary = canary;
#endif
}

#endif	/* _ASM_STACKPROTECTOR_H */
Commit	Line	Data
c3ff2a51 CL	1	/* SPDX-License-Identifier: GPL-2.0 */
	2	/*
	3	* GCC stack protector support.
	4	*
	5	*/
	6
	7	#ifndef _ASM_STACKPROTECTOR_H
	8	#define _ASM_STACKPROTECTOR_H
	9
	10	#include <linux/random.h>
	11	#include <linux/version.h>
	12	#include <asm/reg.h>
	13	#include <asm/current.h>
06ec27ae	14	#include <asm/paca.h>
c3ff2a51 CL	15
	16	/*
	17	* Initialize the stackprotector canary value.
	18	*
	19	* NOTE: this must only be called from functions that never return,
	20	* and it must always be inlined.
	21	*/
	22	static __always_inline void boot_init_stack_canary(void)
	23	{
	24	unsigned long canary;
	25
	26	/* Try to get a semi random initial value. */
	27	canary = get_random_canary();
	28	canary ^= mftb();
	29	canary ^= LINUX_VERSION_CODE;
	30	canary &= CANARY_MASK;
	31
	32	current->stack_canary = canary;
06ec27ae CL	33	#ifdef CONFIG_PPC64
	34	get_paca()->canary = canary;
	35	#endif
c3ff2a51 CL	36	}
	37
	38	#endif /* _ASM_STACKPROTECTOR_H */