forked from Minki/linux
3c1b63b9e4
It's a declaration of a nonexistent symbol. We can get rid of the 64-bit versions, too, but that's more intrusive. Signed-off-by: Andy Lutomirski <luto@amacapital.net> Cc: Stefani Seibold <stefani@seibold.net> Link: http://lkml.kernel.org/r/2ce2ce18447d8a0b78d44a278a066b6c0af06b32.1395366931.git.luto@amacapital.net Signed-off-by: H. Peter Anvin <hpa@zytor.com>
67 lines
1.7 KiB
C
67 lines
1.7 KiB
C
#ifndef _ASM_X86_VDSO_H
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#define _ASM_X86_VDSO_H
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#include <asm/page_types.h>
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#include <linux/linkage.h>
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#ifdef __ASSEMBLER__
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#define DEFINE_VDSO_IMAGE(symname, filename) \
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__PAGE_ALIGNED_DATA ; \
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.globl symname##_start, symname##_end ; \
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.align PAGE_SIZE ; \
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symname##_start: ; \
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.incbin filename ; \
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symname##_end: ; \
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.align PAGE_SIZE /* extra data here leaks to userspace. */ ; \
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\
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.previous ; \
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\
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.globl symname##_pages ; \
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.bss ; \
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.align 8 ; \
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.type symname##_pages, @object ; \
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symname##_pages: ; \
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.zero (symname##_end - symname##_start + PAGE_SIZE - 1) / PAGE_SIZE * (BITS_PER_LONG / 8) ; \
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.size symname##_pages, .-symname##_pages
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#else
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#define DECLARE_VDSO_IMAGE(symname) \
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extern char symname##_start[], symname##_end[]; \
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extern struct page *symname##_pages[]
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#if defined CONFIG_X86_32 || defined CONFIG_COMPAT
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#include <asm/vdso32.h>
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DECLARE_VDSO_IMAGE(vdso32_int80);
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#ifdef CONFIG_COMPAT
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DECLARE_VDSO_IMAGE(vdso32_syscall);
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#endif
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DECLARE_VDSO_IMAGE(vdso32_sysenter);
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/*
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* Given a pointer to the vDSO image, find the pointer to VDSO32_name
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* as that symbol is defined in the vDSO sources or linker script.
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*/
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#define VDSO32_SYMBOL(base, name) \
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({ \
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extern const char VDSO32_##name[]; \
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(void __user *)(VDSO32_##name + (unsigned long)(base)); \
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})
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#endif
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/*
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* These symbols are defined with the addresses in the vsyscall page.
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* See vsyscall-sigreturn.S.
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*/
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extern void __user __kernel_sigreturn;
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extern void __user __kernel_rt_sigreturn;
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void __init patch_vdso32(void *vdso, size_t len);
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#endif /* __ASSEMBLER__ */
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#endif /* _ASM_X86_VDSO_H */
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