arch/sparc/lib/memcmp.S

File Facts

System

Linux kernel

Corpus path

arch/sparc/lib/memcmp.S

Extension

.S

Size

565 bytes

Lines

31

Domain

Architecture Layer

Bucket

arch/sparc

Inferred role

Architecture Layer: exported/initcall integration point

Status

integration 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.
• Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.

Dependency Surface

• linux/export.h
• linux/linkage.h
• asm/asm.h

Detected Declarations

• export memcmp

Annotated Snippet

#include <linux/export.h>
#include <linux/linkage.h>
#include <asm/asm.h>

	.text
ENTRY(memcmp)
	cmp	%o2, 0
1:	BRANCH32(be, pn, 2f)
	 nop
	ldub	[%o0], %g7
	ldub	[%o1], %g3
	sub	%o2, 1, %o2
	add	%o0, 1, %o0
	add	%o1, 1, %o1
	subcc	%g7, %g3, %g3
	BRANCH32(be, pt, 1b)
	 cmp	%o2, 0
	retl
	 mov	%g3, %o0
2:	retl
	 mov	0, %o0
ENDPROC(memcmp)
EXPORT_SYMBOL(memcmp)

Annotation

• Immediate include surface: `linux/export.h`, `linux/linkage.h`, `asm/asm.h`.
• Detected declarations: `export memcmp`.
• Atlas domain: Architecture Layer / arch/sparc.
• Implementation status: integration 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.