1 #ifndef _ASM_X86_VDSO_H 2 #define _ASM_X86_VDSO_H 3 4 #if defined CONFIG_X86_32 || defined CONFIG_COMPAT 5 extern const char VDSO32_PRELINK[]; 6 7 /* 8 * Given a pointer to the vDSO image, find the pointer to VDSO32_name 9 * as that symbol is defined in the vDSO sources or linker script. 10 */ 11 #define VDSO32_SYMBOL(base, name) \ 12 ({ \ 13 extern const char VDSO32_##name[]; \ 14 (void *)(VDSO32_##name - VDSO32_PRELINK + (unsigned long)(base)); \ 15 }) 16 #endif 17 18 /* 19 * These symbols are defined with the addresses in the vsyscall page. 20 * See vsyscall-sigreturn.S. 21 */ 22 extern void __user __kernel_sigreturn; 23 extern void __user __kernel_rt_sigreturn; 24 25 /* 26 * These symbols are defined by vdso32.S to mark the bounds 27 * of the ELF DSO images included therein. 28 */ 29 extern const char vdso32_int80_start, vdso32_int80_end; 30 extern const char vdso32_syscall_start, vdso32_syscall_end; 31 extern const char vdso32_sysenter_start, vdso32_sysenter_end; 32 33 #endif /* _ASM_X86_VDSO_H */ 34