vdso.h 1.3 KB
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#ifndef ASM_X86__VDSO_H
#define ASM_X86__VDSO_H
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#ifdef CONFIG_X86_64
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extern const char VDSO64_PRELINK[];

/*
 * Given a pointer to the vDSO image, find the pointer to VDSO64_name
 * as that symbol is defined in the vDSO sources or linker script.
 */
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#define VDSO64_SYMBOL(base, name)					\
({									\
	extern const char VDSO64_##name[];				\
	(void *)(VDSO64_##name - VDSO64_PRELINK + (unsigned long)(base)); \
})
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#endif

#if defined CONFIG_X86_32 || defined CONFIG_COMPAT
extern const char VDSO32_PRELINK[];

/*
 * Given a pointer to the vDSO image, find the pointer to VDSO32_name
 * as that symbol is defined in the vDSO sources or linker script.
 */
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#define VDSO32_SYMBOL(base, name)					\
({									\
	extern const char VDSO32_##name[];				\
	(void *)(VDSO32_##name - VDSO32_PRELINK + (unsigned long)(base)); \
})
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#endif
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/*
 * These symbols are defined with the addresses in the vsyscall page.
 * See vsyscall-sigreturn.S.
 */
extern void __user __kernel_sigreturn;
extern void __user __kernel_rt_sigreturn;

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/*
 * These symbols are defined by vdso32.S to mark the bounds
 * of the ELF DSO images included therein.
 */
extern const char vdso32_int80_start, vdso32_int80_end;
extern const char vdso32_syscall_start, vdso32_syscall_end;
extern const char vdso32_sysenter_start, vdso32_sysenter_end;

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#endif /* ASM_X86__VDSO_H */