blob: d6f96b1abe409b7526a6c3ad943e83da00b65b44 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
|
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (C) 2014 Regents of the University of California
*/
#include <linux/linkage.h>
#include <asm/unistd.h>
#include <asm/assembler.h>
/*
* WARNING: Do NOT add a CFI landing pad at the start of this function.
* Unwinders such as libgcc identify the sigreturn trampoline by matching the
* instruction sequence. Adding a landing pad here would break unwinding from
* signal handlers.
*
* This trampoline is used only for signal return and not via an indirect
* call/jump from userspace, so adding CFI landing pad is unnecessary.
*/
.text
SYM_FUNC_START(__vdso_rt_sigreturn)
.cfi_startproc
.cfi_signal_frame
li a7, __NR_rt_sigreturn
ecall
.cfi_endproc
SYM_FUNC_END(__vdso_rt_sigreturn)
emit_riscv_feature_1_and
|
