arm64: Add CONFIG_CC_STACKPROTECTOR

	select HAVE_ARCH_KGDB

	select HAVE_ARCH_TRACEHOOK

	select HAVE_C_RECORDMCOUNT

	select HAVE_CC_STACKPROTECTOR

	select HAVE_DEBUG_BUGVERBOSE

	select HAVE_DEBUG_KMEMLEAK

	select HAVE_DMA_API_DEBUG

/*

 * GCC stack protector support.

 *

 * Stack protector works by putting predefined pattern at the start of

 * the stack frame and verifying that it hasn't been overwritten when

 * returning from the function.  The pattern is called stack canary

 * and gcc expects it to be defined by a global variable called

 * "__stack_chk_guard" on ARM.  This unfortunately means that on SMP

 * we cannot have a different canary value per task.

 */

#ifndef __ASM_STACKPROTECTOR_H

#define __ASM_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;

	current->stack_canary = canary;

	__stack_chk_guard = current->stack_canary;

}

#endif	/* _ASM_STACKPROTECTOR_H */

#include <asm/processor.h>

#include <asm/stacktrace.h>

#ifdef CONFIG_CC_STACKPROTECTOR

#include <linux/stackprotector.h>

unsigned long __stack_chk_guard __read_mostly;

EXPORT_SYMBOL(__stack_chk_guard);

#endif

static void setup_restart(void)

{

	/*