| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * AArch32 sigreturn code. |
| * Based on the kuser helpers in arch/arm/kernel/entry-armv.S. |
| * |
| * Copyright (C) 2005-2011 Nicolas Pitre <nico@fluxnic.net> |
| * Copyright (C) 2012-2018 ARM Ltd. |
| * |
| * For ARM syscalls, the syscall number has to be loaded into r7. |
| * We do not support an OABI userspace. |
| * |
| * For Thumb syscalls, we also pass the syscall number via r7. We therefore |
| * need two 16-bit instructions. |
| */ |
| |
| #include <asm/unistd.h> |
| |
| .section .rodata |
| .globl __aarch32_sigret_code_start |
| __aarch32_sigret_code_start: |
| |
| /* |
| * ARM Code |
| */ |
| .byte __NR_compat_sigreturn, 0x70, 0xa0, 0xe3 // mov r7, #__NR_compat_sigreturn |
| .byte __NR_compat_sigreturn, 0x00, 0x00, 0xef // svc #__NR_compat_sigreturn |
| |
| /* |
| * Thumb code |
| */ |
| .byte __NR_compat_sigreturn, 0x27 // svc #__NR_compat_sigreturn |
| .byte __NR_compat_sigreturn, 0xdf // mov r7, #__NR_compat_sigreturn |
| |
| /* |
| * ARM code |
| */ |
| .byte __NR_compat_rt_sigreturn, 0x70, 0xa0, 0xe3 // mov r7, #__NR_compat_rt_sigreturn |
| .byte __NR_compat_rt_sigreturn, 0x00, 0x00, 0xef // svc #__NR_compat_rt_sigreturn |
| |
| /* |
| * Thumb code |
| */ |
| .byte __NR_compat_rt_sigreturn, 0x27 // svc #__NR_compat_rt_sigreturn |
| .byte __NR_compat_rt_sigreturn, 0xdf // mov r7, #__NR_compat_rt_sigreturn |
| |
| .globl __aarch32_sigret_code_end |
| __aarch32_sigret_code_end: |
