8a8f786666
PPC64 removed default mapping address from VDSO in
commit 30d0b3682887 ("powerpc: Move 64bit VDSO to improve context
switch performance").
Do like PPC64 and let get_unmapped_area() place the VDSO mapping
at the address it wants, don't force a default address.
This allows randomisation of VDSO address.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/cba76f5a5b01fcc49415e632d92c11c1c5998cab.1660843877.git.christophe.leroy@csgroup.eu
53 lines
995 B
C
53 lines
995 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_POWERPC_VDSO_H
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#define _ASM_POWERPC_VDSO_H
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#define VDSO_VERSION_STRING LINUX_2.6.15
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#ifndef __ASSEMBLY__
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#ifdef CONFIG_PPC64
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#include <generated/vdso64-offsets.h>
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#endif
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#ifdef CONFIG_VDSO32
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#include <generated/vdso32-offsets.h>
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#endif
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#define VDSO64_SYMBOL(base, name) ((unsigned long)(base) + (vdso64_offset_##name))
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#define VDSO32_SYMBOL(base, name) ((unsigned long)(base) + (vdso32_offset_##name))
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int vdso_getcpu_init(void);
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#else /* __ASSEMBLY__ */
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#ifdef __VDSO64__
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#define V_FUNCTION_BEGIN(name) \
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.globl name; \
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name: \
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#define V_FUNCTION_END(name) \
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.size name,.-name;
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#define V_LOCAL_FUNC(name) (name)
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#endif /* __VDSO64__ */
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#ifdef __VDSO32__
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#define V_FUNCTION_BEGIN(name) \
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.globl name; \
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.type name,@function; \
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name: \
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#define V_FUNCTION_END(name) \
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.size name,.-name;
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#define V_LOCAL_FUNC(name) (name)
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#endif /* __VDSO32__ */
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#endif /* __ASSEMBLY__ */
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#endif /* _ASM_POWERPC_VDSO_H */
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