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