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