tools/testing/selftests/arm64/pauth/helper.c

Source file repositories/reference/linux-study-clean/tools/testing/selftests/arm64/pauth/helper.c

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/arm64/pauth/helper.c
Extension
.c
Size
660 bytes
Lines
40
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

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

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
// Copyright (C) 2020 ARM Limited

#include "helper.h"

size_t keyia_sign(size_t ptr)
{
	asm volatile("paciza %0" : "+r" (ptr));
	return ptr;
}

size_t keyib_sign(size_t ptr)
{
	asm volatile("pacizb %0" : "+r" (ptr));
	return ptr;
}

size_t keyda_sign(size_t ptr)
{
	asm volatile("pacdza %0" : "+r" (ptr));
	return ptr;
}

size_t keydb_sign(size_t ptr)
{
	asm volatile("pacdzb %0" : "+r" (ptr));
	return ptr;
}

size_t keyg_sign(size_t ptr)
{
	/* output is encoded in the upper 32 bits */
	size_t dest = 0;
	size_t modifier = 0;

	asm volatile("pacga %0, %1, %2" : "=r" (dest) : "r" (ptr), "r" (modifier));

	return dest;
}

Annotation

Implementation Notes