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H. Peter Anvin1965aae2008-10-22 22:26:29 -07001#ifndef _ASM_X86_VDSO_H
2#define _ASM_X86_VDSO_H
Roland McGrath7f3646a2008-01-30 13:30:41 +01003
Roland McGrath6c3652e2008-01-30 13:30:42 +01004#ifdef CONFIG_X86_64
Roland McGrath7f3646a2008-01-30 13:30:41 +01005extern const char VDSO64_PRELINK[];
6
7/*
8 * Given a pointer to the vDSO image, find the pointer to VDSO64_name
9 * as that symbol is defined in the vDSO sources or linker script.
10 */
Joe Perchesac1a7b02008-03-23 01:03:56 -070011#define VDSO64_SYMBOL(base, name) \
12({ \
13 extern const char VDSO64_##name[]; \
14 (void *)(VDSO64_##name - VDSO64_PRELINK + (unsigned long)(base)); \
15})
Roland McGrath6c3652e2008-01-30 13:30:42 +010016#endif
17
18#if defined CONFIG_X86_32 || defined CONFIG_COMPAT
19extern const char VDSO32_PRELINK[];
20
21/*
22 * Given a pointer to the vDSO image, find the pointer to VDSO32_name
23 * as that symbol is defined in the vDSO sources or linker script.
24 */
Joe Perchesac1a7b02008-03-23 01:03:56 -070025#define VDSO32_SYMBOL(base, name) \
26({ \
27 extern const char VDSO32_##name[]; \
28 (void *)(VDSO32_##name - VDSO32_PRELINK + (unsigned long)(base)); \
29})
Roland McGrath6c3652e2008-01-30 13:30:42 +010030#endif
Roland McGrath7f3646a2008-01-30 13:30:41 +010031
Ingo Molnareee6dd12008-03-06 10:39:07 +010032/*
33 * These symbols are defined with the addresses in the vsyscall page.
34 * See vsyscall-sigreturn.S.
35 */
36extern void __user __kernel_sigreturn;
37extern void __user __kernel_rt_sigreturn;
38
Jeremy Fitzhardinge6a52e4b2008-07-12 02:22:00 -070039/*
40 * These symbols are defined by vdso32.S to mark the bounds
41 * of the ELF DSO images included therein.
42 */
43extern const char vdso32_int80_start, vdso32_int80_end;
44extern const char vdso32_syscall_start, vdso32_syscall_end;
45extern const char vdso32_sysenter_start, vdso32_sysenter_end;
46
H. Peter Anvin1965aae2008-10-22 22:26:29 -070047#endif /* _ASM_X86_VDSO_H */