arch/arm64/include/asm/stackprotector.h

File Facts

System

Linux kernel

Corpus path

arch/arm64/include/asm/stackprotector.h

Extension

.h

Size

1181 bytes

Lines

41

Domain

Architecture Layer

Bucket

arch/arm64

Inferred role

Architecture Layer: implementation source

Status

source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

• CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

• asm/pointer_auth.h

Detected Declarations

• function boot_init_stack_canary

Annotated Snippet

#ifndef __ASM_STACKPROTECTOR_H
#define __ASM_STACKPROTECTOR_H

#include <asm/pointer_auth.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)
{
#if defined(CONFIG_STACKPROTECTOR)
	unsigned long canary = get_random_canary();

	current->stack_canary = canary;
	if (!IS_ENABLED(CONFIG_STACKPROTECTOR_PER_TASK))
		__stack_chk_guard = current->stack_canary;
#endif
	ptrauth_thread_init_kernel(current);
	ptrauth_thread_switch_kernel(current);
	ptrauth_enable();
}

#endif	/* _ASM_STACKPROTECTOR_H */

Annotation

• Immediate include surface: `asm/pointer_auth.h`.
• Detected declarations: `function boot_init_stack_canary`.
• Atlas domain: Architecture Layer / arch/arm64.
• Implementation status: source implementation candidate.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.