1965aae3c9
Change header guards named "ASM_X86__*" to "_ASM_X86_*" since: a. the double underscore is ugly and pointless. b. no leading underscore violates namespace constraints. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
47 lines
1.3 KiB
C
47 lines
1.3 KiB
C
#ifndef _ASM_X86_VDSO_H
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#define _ASM_X86_VDSO_H
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#ifdef CONFIG_X86_64
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extern const char VDSO64_PRELINK[];
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/*
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* Given a pointer to the vDSO image, find the pointer to VDSO64_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 VDSO64_SYMBOL(base, name) \
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({ \
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extern const char VDSO64_##name[]; \
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(void *)(VDSO64_##name - VDSO64_PRELINK + (unsigned long)(base)); \
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})
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#endif
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#if defined CONFIG_X86_32 || defined CONFIG_COMPAT
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extern const char VDSO32_PRELINK[];
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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 *)(VDSO32_##name - VDSO32_PRELINK + (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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/*
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* These symbols are defined by vdso32.S to mark the bounds
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* of the ELF DSO images included therein.
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*/
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extern const char vdso32_int80_start, vdso32_int80_end;
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extern const char vdso32_syscall_start, vdso32_syscall_end;
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extern const char vdso32_sysenter_start, vdso32_sysenter_end;
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#endif /* _ASM_X86_VDSO_H */
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