tools/testing/selftests/arm64/bti/start.S

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright (C) 2019  Arm Limited
 * Original author: Dave Martin <Dave.Martin@arm.com>
 */

#include "assembler.h"

startfn _start
	mov	x0, sp
	b	start
endfn

emit_aarch64_feature_1_and
kselftest: arm64: Add BTI tests Add some tests that verify that BTI functions correctly for static binaries built with and without BTI support, verifying that SIGILL is generated when expected and is not generated in other situations. Since BTI support is still being rolled out in distributions these tests are built entirely free standing, no libc support is used at all so none of the standard helper functions for kselftest can be used and we open code everything. This also means we aren't testing the kernel support for the dynamic linker, though the test program can be readily adapted for that once it becomes something that we can reliably build and run. These tests were originally written by Dave Martin, I've adapted them for kselftest, mainly around the build system and the output format. Signed-off-by: Mark Brown <broonie@kernel.org> Cc: Dave Martin <Dave.Martin@arm.com> Link: https://lore.kernel.org/r/20210309193731.57247-1-broonie@kernel.org Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> 2021-03-09 19:37:31 +00:00			`/* SPDX-License-Identifier: GPL-2.0 */`
			`/*`
			`* Copyright (C) 2019 Arm Limited`
			`* Original author: Dave Martin <Dave.Martin@arm.com>`
			`*/`

			`#include "assembler.h"`

			`startfn _start`
			`mov x0, sp`
			`b start`
			`endfn`

			`emit_aarch64_feature_1_and`