48 lines
1.3 KiB
ArmAsm
48 lines
1.3 KiB
ArmAsm
|
/* 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:
|