arch/sh/lib/memchr.S

File Facts

System

Linux kernel

Corpus path

arch/sh/lib/memchr.S

Extension

.S

Size

412 bytes

Lines

28

Domain

Architecture Layer

Bucket

arch/sh

Inferred role

Architecture Layer: arch/sh

Status

atlas-only

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/linkage.h

Detected Declarations

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

Annotated Snippet

#include <linux/linkage.h>
ENTRY(memchr)
	tst	r6,r6
	bt/s	2f
	 exts.b	r5,r5
1:	mov.b	@r4,r1
	cmp/eq	r1,r5
	bt/s	3f
	 dt	r6
	bf/s	1b
	 add	#1,r4
2:	mov	#0,r4
3:	rts
	 mov	r4,r0

Annotation

• Immediate include surface: `linux/linkage.h`.
• Atlas domain: Architecture Layer / arch/sh.
• Implementation status: atlas-only.

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.