arch/arm64/include/asm/compiler.h

File Facts

System

Linux kernel

Corpus path

arch/arm64/include/asm/compiler.h

Extension

.h

Size

979 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

• No C-style include directives detected by the generator.

Detected Declarations

• No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

#ifndef __ASM_COMPILER_H
#define __ASM_COMPILER_H

#ifdef ARM64_ASM_ARCH
#define ARM64_ASM_PREAMBLE ".arch " ARM64_ASM_ARCH "\n"
#else
#define ARM64_ASM_PREAMBLE
#endif

#define xpaclri(ptr)							\
({									\
	register unsigned long __xpaclri_ptr asm("x30") = (ptr);	\
									\
	asm(								\
	ARM64_ASM_PREAMBLE						\
	"	hint	#7\n"						\
	: "+r" (__xpaclri_ptr));					\
									\
	__xpaclri_ptr;							\
})

#ifdef CONFIG_ARM64_PTR_AUTH_KERNEL
#define ptrauth_strip_kernel_insn_pac(ptr)	xpaclri(ptr)
#else
#define ptrauth_strip_kernel_insn_pac(ptr)	(ptr)
#endif

#ifdef CONFIG_ARM64_PTR_AUTH
#define ptrauth_strip_user_insn_pac(ptr)	xpaclri(ptr)
#else
#define ptrauth_strip_user_insn_pac(ptr)	(ptr)
#endif

#if !defined(CONFIG_BUILTIN_RETURN_ADDRESS_STRIPS_PAC)
#define __builtin_return_address(val)					\
	(void *)(ptrauth_strip_kernel_insn_pac((unsigned long)__builtin_return_address(val)))
#endif

#endif /* __ASM_COMPILER_H */

Annotation

• 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.