linux/tools/testing/selftests/x86/clang_helpers_32.S

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * 32-bit assembly helpers for asm operations that lack support in both gcc and
 * clang. For example, clang asm does not support segment prefixes.
 */
.global dereference_seg_base
dereference_seg_base:
	mov %fs:(0), %eax
	ret

.section .note.GNU-stack,"",%progbits
selftests/x86: build fsgsbase_restore.c with clang When building with clang, via: make LLVM=1 -C tools/testing/selftests Fix this by moving the inline asm to "pure" assembly, in two new files: clang_helpers_32.S, clang_helpers_64.S. As a bonus, the pure asm avoids the need for ifdefs, and is now very simple and easy on the eyes. Acked-by: Muhammad Usama Anjum <usama.anjum@collabora.com> Signed-off-by: John Hubbard <jhubbard@nvidia.com> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org> 2024-07-04 00:24:27 -07:00			`/* SPDX-License-Identifier: GPL-2.0-only */`
			`/*`
			`* 32-bit assembly helpers for asm operations that lack support in both gcc and`
			`* clang. For example, clang asm does not support segment prefixes.`
			`*/`
			`.global dereference_seg_base`
			`dereference_seg_base:`
			`mov %fs:(0), %eax`
			`ret`

			`.section .note.GNU-stack,"",%progbits`