| Ivan Gorinov | 8a57ea7 | 2018-06-19 11:40:42 -0700 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | /* |
| 3 | * Copyright (C) 2018 Intel Corporation |
| 4 | * |
| 5 | * See arch/x86/include/asm/setjmp.h for jmp_buf format |
| 6 | */ |
| 7 | |
| 8 | #include <linux/linkage.h> |
| 9 | |
| 10 | .text |
| 11 | .align 8 |
| 12 | |
| 13 | ENTRY(setjmp) |
| 14 | |
| 15 | pop %rcx |
| 16 | movq %rcx, (%rdi) /* Return address */ |
| 17 | movq %rsp, 8(%rdi) |
| 18 | movq %rbp, 16(%rdi) |
| 19 | movq %rbx, 24(%rdi) |
| 20 | movq %r12, 32(%rdi) |
| 21 | movq %r13, 40(%rdi) |
| 22 | movq %r14, 48(%rdi) |
| 23 | movq %r15, 56(%rdi) |
| 24 | xorq %rax, %rax /* Direct invocation returns 0 */ |
| 25 | jmpq *%rcx |
| 26 | |
| 27 | ENDPROC(setjmp) |
| 28 | |
| 29 | .align 8 |
| 30 | |
| 31 | ENTRY(longjmp) |
| 32 | |
| 33 | movq (%rdi), %rcx /* Return address */ |
| 34 | movq 8(%rdi), %rsp |
| 35 | movq 16(%rdi), %rbp |
| 36 | movq 24(%rdi), %rbx |
| 37 | movq 32(%rdi), %r12 |
| 38 | movq 40(%rdi), %r13 |
| 39 | movq 48(%rdi), %r14 |
| 40 | movq 56(%rdi), %r15 |
| 41 | |
| 42 | movq %rsi, %rax /* Value to be returned by setjmp() */ |
| 43 | testq %rax, %rax /* cannot be 0 in this case */ |
| 44 | jnz 1f |
| 45 | incq %rax /* Return 1 instead */ |
| 46 | 1: |
| 47 | jmpq *%rcx |
| 48 | |
| 49 | ENDPROC(longjmp) |