1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * AArch32 sigreturn code.
4 * Based on the kuser helpers in arch/arm/kernel/entry-armv.S.
5 *
6 * Copyright (C) 2005-2011 Nicolas Pitre <nico@fluxnic.net>
7 * Copyright (C) 2012-2018 ARM Ltd.
8 *
9 * For ARM syscalls, the syscall number has to be loaded into r7.
10 * We do not support an OABI userspace.
11 *
12 * For Thumb syscalls, we also pass the syscall number via r7. We therefore
13 * need two 16-bit instructions.
14 */
15
16#include <asm/unistd.h>
17
18	.section .rodata
19	.globl __aarch32_sigret_code_start
20__aarch32_sigret_code_start:
21
22	/*
23	 * ARM Code
24	 */
25	.byte	__NR_compat_sigreturn, 0x70, 0xa0, 0xe3		// mov	r7, #__NR_compat_sigreturn
26	.byte	__NR_compat_sigreturn, 0x00, 0x00, 0xef		// svc	#__NR_compat_sigreturn
27
28	/*
29	 * Thumb code
30	 */
31	.byte	__NR_compat_sigreturn, 0x27			// svc	#__NR_compat_sigreturn
32	.byte	__NR_compat_sigreturn, 0xdf			// mov	r7, #__NR_compat_sigreturn
33
34	/*
35	 * ARM code
36	 */
37	.byte	__NR_compat_rt_sigreturn, 0x70, 0xa0, 0xe3	// mov	r7, #__NR_compat_rt_sigreturn
38	.byte	__NR_compat_rt_sigreturn, 0x00, 0x00, 0xef	// svc	#__NR_compat_rt_sigreturn
39
40	/*
41	 * Thumb code
42	 */
43	.byte	__NR_compat_rt_sigreturn, 0x27			// svc	#__NR_compat_rt_sigreturn
44	.byte	__NR_compat_rt_sigreturn, 0xdf			// mov	r7, #__NR_compat_rt_sigreturn
45
46        .globl __aarch32_sigret_code_end
47__aarch32_sigret_code_end:
48