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#ifndef _ASM_X86_VDSO_H
#define _ASM_X86_VDSO_H
#include <asm/page_types.h>
#include <linux/linkage.h>
#ifdef __ASSEMBLER__
#define DEFINE_VDSO_IMAGE(symname, filename) \
__PAGE_ALIGNED_DATA ; \
.globl symname##_start, symname##_end ; \
.align PAGE_SIZE ; \
symname##_start: ; \
.incbin filename ; \
symname##_end: ; \
.align PAGE_SIZE /* extra data here leaks to userspace. */ ; \
\
.previous ; \
\
.globl symname##_pages ; \
.bss ; \
.align 8 ; \
.type symname##_pages, @object ; \
symname##_pages: ; \
.zero (symname##_end - symname##_start + PAGE_SIZE - 1) / PAGE_SIZE * (BITS_PER_LONG / 8) ; \
.size symname##_pages, .-symname##_pages
#else
#define DECLARE_VDSO_IMAGE(symname) \
extern char symname##_start[], symname##_end[]; \
extern struct page *symname##_pages[]
#if defined CONFIG_X86_32 || defined CONFIG_COMPAT
#include <asm/vdso32.h>
DECLARE_VDSO_IMAGE(vdso32_int80);
#ifdef CONFIG_COMPAT
DECLARE_VDSO_IMAGE(vdso32_syscall);
#endif
DECLARE_VDSO_IMAGE(vdso32_sysenter);
/*
* 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.
*/
#define VDSO32_SYMBOL(base, name) \
({ \
extern const char VDSO32_##name[]; \
(void __user *)(VDSO32_##name + (unsigned long)(base)); \
})
#endif
/*
* 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;
void __init patch_vdso32(void *vdso, size_t len);
#endif /* __ASSEMBLER__ */
#endif /* _ASM_X86_VDSO_H */
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