arch/x86/include/asm/string_64.h

File Facts

System

Linux kernel

Corpus path

arch/x86/include/asm/string_64.h

Extension

.h

Size

2595 bytes

Lines

108

Domain

Architecture Layer

Bucket

arch/x86

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

• linux/jump_label.h
• linux/kmsan_string.h

Detected Declarations

• function memsetXX
• function memcpy_flushcache

Annotated Snippet

switch (cnt) {
			case 4:
				asm ("movntil %1, %0" : "=m"(*(u32 *)dst) : "r"(*(u32 *)src));
				return;
			case 8:
				asm ("movntiq %1, %0" : "=m"(*(u64 *)dst) : "r"(*(u64 *)src));
				return;
			case 16:
				asm ("movntiq %1, %0" : "=m"(*(u64 *)dst) : "r"(*(u64 *)src));
				asm ("movntiq %1, %0" : "=m"(*(u64 *)(dst + 8)) : "r"(*(u64 *)(src + 8)));
				return;
		}
	}
	__memcpy_flushcache(dst, src, cnt);
}
#endif

#endif /* __KERNEL__ */

#endif /* _ASM_X86_STRING_64_H */

Annotation

• Immediate include surface: `linux/jump_label.h`, `linux/kmsan_string.h`.
• Detected declarations: `function memsetXX`, `function memcpy_flushcache`.
• Atlas domain: Architecture Layer / arch/x86.
• 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.