/* SPDX-License-Identifier: GPL-2.0 */ | |
/* | |
* Copyright (C) 2018 Intel Corporation | |
* | |
* See arch/x86/include/asm/setjmp.h for jmp_buf format | |
*/ | |
#include <linux/linkage.h> | |
.text | |
.align 8 | |
ENTRY(setjmp) | |
pop %rcx | |
movq %rcx, (%rdi) /* Return address */ | |
movq %rsp, 8(%rdi) | |
movq %rbp, 16(%rdi) | |
movq %rbx, 24(%rdi) | |
movq %r12, 32(%rdi) | |
movq %r13, 40(%rdi) | |
movq %r14, 48(%rdi) | |
movq %r15, 56(%rdi) | |
xorq %rax, %rax /* Direct invocation returns 0 */ | |
jmpq *%rcx | |
ENDPROC(setjmp) | |
.align 8 | |
ENTRY(longjmp) | |
movq (%rdi), %rcx /* Return address */ | |
movq 8(%rdi), %rsp | |
movq 16(%rdi), %rbp | |
movq 24(%rdi), %rbx | |
movq 32(%rdi), %r12 | |
movq 40(%rdi), %r13 | |
movq 48(%rdi), %r14 | |
movq 56(%rdi), %r15 | |
movq %rsi, %rax /* Value to be returned by setjmp() */ | |
testq %rax, %rax /* cannot be 0 in this case */ | |
jnz 1f | |
incq %rax /* Return 1 instead */ | |
1: | |
jmpq *%rcx | |
ENDPROC(longjmp) |