tools/testing/selftests/arm64/pauth/pac_corruptor.S

File Facts

System

Linux kernel

Corpus path

tools/testing/selftests/arm64/pauth/pac_corruptor.S

Extension

.S

Size

399 bytes

Lines

20

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

• 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

.global pac_corruptor

.text
/*
 * Corrupting a single bit of the PAC ensures the authentication will fail.  It
 * also guarantees no possible collision. TCR_EL1.TBI0 is set by default so no
 * top byte PAC is tested
 */
 pac_corruptor:
	paciasp

	/* corrupt the top bit of the PAC */
	eor lr, lr, #1 << 53

	autiasp
	ret

Annotation

• 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.