33 lines
647 B
ArmAsm
33 lines
647 B
ArmAsm
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Syscall restart trampoline for 32 and 64 bits processes.
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*
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* Copyright (C) 2018-2022 Helge Deller <deller@gmx.de>
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* Copyright (C) 2022 John David Anglin <dave.anglin@bell.net>
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*/
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#include <asm/unistd.h>
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#include <asm/vdso.h>
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#include <linux/linkage.h>
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.text
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ENTRY_CFI(__kernel_restart_syscall)
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/*
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* Setup a trampoline to restart the syscall
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* with __NR_restart_syscall
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*/
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/* load return pointer */
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#if defined(__VDSO64__)
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ldd 0(%sp), %r31
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#elif defined(__VDSO32__)
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ldw 0(%sp), %r31
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#endif
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be 0x100(%sr2, %r0)
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ldi __NR_restart_syscall, %r20
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ENDPROC_CFI(__kernel_restart_syscall)
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