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46 lines
1.3 KiB
46 lines
1.3 KiB
/* 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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