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4e3bca8f7c
Make it possible to use alternatives in the vDSO, so that better implementations can be used if possible. Signed-off-by: Joey Gouly <joey.gouly@arm.com> Cc: Will Deacon <will@kernel.org> Cc: Vincenzo Frascino <vincenzo.frascino@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Acked-by: Mark Rutland <mark.rutland@arm.com> Link: https://lore.kernel.org/r/20220830104833.34636-3-joey.gouly@arm.com Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
35 lines
712 B
C
35 lines
712 B
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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*/
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#ifndef __ASM_VDSO_H
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#define __ASM_VDSO_H
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/*
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* Default link address for the vDSO.
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* Since we randomise the VDSO mapping, there's little point in trying
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* to prelink this.
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*/
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#define VDSO_LBASE 0x0
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#define __VVAR_PAGES 2
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#ifndef __ASSEMBLY__
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#include <generated/vdso-offsets.h>
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#ifdef CONFIG_COMPAT_VDSO
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#include <generated/vdso32-offsets.h>
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#endif
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#define VDSO_SYMBOL(base, name) \
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({ \
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(void *)(vdso_offset_##name - VDSO_LBASE + (unsigned long)(base)); \
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})
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extern char vdso_start[], vdso_end[];
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extern char vdso32_start[], vdso32_end[];
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#endif /* !__ASSEMBLY__ */
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#endif /* __ASM_VDSO_H */
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