tools/testing/selftests/powerpc/copyloops/copy_tofrom_user_reference.S

File Facts

System

Linux kernel

Corpus path

tools/testing/selftests/powerpc/copyloops/copy_tofrom_user_reference.S

Extension

.S

Size

258 bytes

Lines

25

Domain

Support Tooling And Documentation

Bucket

tools

Inferred role

Support Tooling And Documentation: tools

Status

atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

• Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

• asm/ppc_asm.h

Detected Declarations

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

Annotated Snippet

#include <asm/ppc_asm.h>

_GLOBAL(copy_tofrom_user_reference)
	cmpdi	r5,0
	beq	4f

	mtctr	r5

1:	lbz	r6,0(r4)
2:	stb	r6,0(r3)
	addi	r3,r3,1
	addi	r4,r4,1
	bdnz	1b

3:	mfctr	r3
	blr

4:	mr	r3,r5
	blr

.section __ex_table,"a"
	.llong	1b,3b
	.llong	2b,3b
.text

Annotation

• Immediate include surface: `asm/ppc_asm.h`.
• Atlas domain: Support Tooling And Documentation / tools.
• 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.