c6b99bed6b
Add VDSO and VSYSCALL support (sigreturn, gettimeofday and its friends) for LoongArch. Reviewed-by: WANG Xuerui <git@xen0n.name> Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
31 lines
540 B
C
31 lines
540 B
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Author: Huacai Chen <chenhuacai@loongson.cn>
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* Copyright (C) 2020-2022 Loongson Technology Corporation Limited
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*/
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#ifndef __ASSEMBLY__
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#include <asm/asm.h>
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#include <asm/page.h>
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static inline unsigned long get_vdso_base(void)
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{
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unsigned long addr;
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__asm__(
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" la.pcrel %0, _start\n"
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: "=r" (addr)
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:
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:);
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return addr;
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}
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static inline const struct vdso_data *get_vdso_data(void)
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{
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return (const struct vdso_data *)(get_vdso_base() - PAGE_SIZE);
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}
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#endif /* __ASSEMBLY__ */
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