1#ifndef _ASM_X86_VDSO_H 2#define _ASM_X86_VDSO_H 3 4#ifdef CONFIG_X86_64 5extern 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 */ 11#define VDSO64_SYMBOL(base, name) \ 12({ \ 13 extern const char VDSO64_##name[]; \ 14 (void *)(VDSO64_##name - VDSO64_PRELINK + (unsigned long)(base)); \ 15}) 16#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 */ 25#define VDSO32_SYMBOL(base, name) \ 26({ \ 27 extern const char VDSO32_##name[]; \ 28 (void *)(VDSO32_##name - VDSO32_PRELINK + (unsigned long)(base)); \ 29}) 30#endif 31 32/* 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 39/* 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 47#endif /* _ASM_X86_VDSO_H */ 48