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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* 64-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 %gs:(0), %rax
ret
.global test_page
.global test_syscall_insn
.pushsection ".text", "ax"
.balign 4096
test_page: .globl test_page
.fill 4094,1,0xcc
test_syscall_insn:
syscall
.ifne . - test_page - 4096
.error "test page is not one page long"
.endif
.popsection
.section .note.GNU-stack,"",%progbits
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