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 .globl __aarch32_sigret_code_start 19__aarch32_sigret_code_start: 20 21 /* 22 * ARM Code 23 */ 24 .byte __NR_compat_sigreturn, 0x70, 0xa0, 0xe3 // mov r7, #__NR_compat_sigreturn 25 .byte __NR_compat_sigreturn, 0x00, 0x00, 0xef // svc #__NR_compat_sigreturn 26 27 /* 28 * Thumb code 29 */ 30 .byte __NR_compat_sigreturn, 0x27 // svc #__NR_compat_sigreturn 31 .byte __NR_compat_sigreturn, 0xdf // mov r7, #__NR_compat_sigreturn 32 33 /* 34 * ARM code 35 */ 36 .byte __NR_compat_rt_sigreturn, 0x70, 0xa0, 0xe3 // mov r7, #__NR_compat_rt_sigreturn 37 .byte __NR_compat_rt_sigreturn, 0x00, 0x00, 0xef // svc #__NR_compat_rt_sigreturn 38 39 /* 40 * Thumb code 41 */ 42 .byte __NR_compat_rt_sigreturn, 0x27 // svc #__NR_compat_rt_sigreturn 43 .byte __NR_compat_rt_sigreturn, 0xdf // mov r7, #__NR_compat_rt_sigreturn 44 45 .globl __aarch32_sigret_code_end 46__aarch32_sigret_code_end: 47