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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2026-08-09 06:14:34 +02:00
Thomas WeißschuhandPaul Walmsley
499578e22a
Make the declarations of vdso_start and its related symbols always visible. With that their users don't have to use ifdeffery but can use the better IS_ENABLED() compile-time checks. Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de> Link: https://patch.msgid.link/20260504-riscv-cfi-vdso-alternative-v1-1-bcdf3d37f62e@linutronix.de Signed-off-by: Paul Walmsley <pjw@kernel.org>
53 lines
1.3 KiB
C
53 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2012 ARM Limited
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* Copyright (C) 2014 Regents of the University of California
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* Copyright (C) 2017 SiFive
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*/
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#ifndef _ASM_RISCV_VDSO_H
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#define _ASM_RISCV_VDSO_H
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/*
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* All systems with an MMU have a VDSO, but systems without an MMU don't
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* support shared libraries and therefore don't have one.
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*/
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#define __VDSO_PAGES 4
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#ifndef __ASSEMBLER__
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#ifdef CONFIG_MMU
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#include <generated/vdso-offsets.h>
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#endif
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#ifdef CONFIG_RISCV_USER_CFI
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#include <generated/vdso-cfi-offsets.h>
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#endif
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#ifdef CONFIG_RISCV_USER_CFI
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#define VDSO_SYMBOL(base, name) \
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(riscv_has_extension_unlikely(RISCV_ISA_EXT_ZIMOP) ? \
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(void __user *)((unsigned long)(base) + __vdso_##name##_cfi_offset) : \
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(void __user *)((unsigned long)(base) + __vdso_##name##_offset))
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#else
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#define VDSO_SYMBOL(base, name) \
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((void __user *)((unsigned long)(base) + __vdso_##name##_offset))
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#endif
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#ifdef CONFIG_COMPAT
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#include <generated/compat_vdso-offsets.h>
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#define COMPAT_VDSO_SYMBOL(base, name) \
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(void __user *)((unsigned long)(base) + compat__vdso_##name##_offset)
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#endif /* CONFIG_COMPAT */
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extern char vdso_start[], vdso_end[];
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extern char vdso_cfi_start[], vdso_cfi_end[];
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extern char compat_vdso_start[], compat_vdso_end[];
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#endif /* !__ASSEMBLER__ */
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#endif /* _ASM_RISCV_VDSO_H */
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