1*1965aae3SH. Peter Anvin #ifndef _ASM_X86_VDSO_H 2*1965aae3SH. Peter Anvin #define _ASM_X86_VDSO_H 3bb898558SAl Viro 4bb898558SAl Viro #ifdef CONFIG_X86_64 5bb898558SAl Viro extern const char VDSO64_PRELINK[]; 6bb898558SAl Viro 7bb898558SAl Viro /* 8bb898558SAl Viro * Given a pointer to the vDSO image, find the pointer to VDSO64_name 9bb898558SAl Viro * as that symbol is defined in the vDSO sources or linker script. 10bb898558SAl Viro */ 11bb898558SAl Viro #define VDSO64_SYMBOL(base, name) \ 12bb898558SAl Viro ({ \ 13bb898558SAl Viro extern const char VDSO64_##name[]; \ 14bb898558SAl Viro (void *)(VDSO64_##name - VDSO64_PRELINK + (unsigned long)(base)); \ 15bb898558SAl Viro }) 16bb898558SAl Viro #endif 17bb898558SAl Viro 18bb898558SAl Viro #if defined CONFIG_X86_32 || defined CONFIG_COMPAT 19bb898558SAl Viro extern const char VDSO32_PRELINK[]; 20bb898558SAl Viro 21bb898558SAl Viro /* 22bb898558SAl Viro * Given a pointer to the vDSO image, find the pointer to VDSO32_name 23bb898558SAl Viro * as that symbol is defined in the vDSO sources or linker script. 24bb898558SAl Viro */ 25bb898558SAl Viro #define VDSO32_SYMBOL(base, name) \ 26bb898558SAl Viro ({ \ 27bb898558SAl Viro extern const char VDSO32_##name[]; \ 28bb898558SAl Viro (void *)(VDSO32_##name - VDSO32_PRELINK + (unsigned long)(base)); \ 29bb898558SAl Viro }) 30bb898558SAl Viro #endif 31bb898558SAl Viro 32bb898558SAl Viro /* 33bb898558SAl Viro * These symbols are defined with the addresses in the vsyscall page. 34bb898558SAl Viro * See vsyscall-sigreturn.S. 35bb898558SAl Viro */ 36bb898558SAl Viro extern void __user __kernel_sigreturn; 37bb898558SAl Viro extern void __user __kernel_rt_sigreturn; 38bb898558SAl Viro 39bb898558SAl Viro /* 40bb898558SAl Viro * These symbols are defined by vdso32.S to mark the bounds 41bb898558SAl Viro * of the ELF DSO images included therein. 42bb898558SAl Viro */ 43bb898558SAl Viro extern const char vdso32_int80_start, vdso32_int80_end; 44bb898558SAl Viro extern const char vdso32_syscall_start, vdso32_syscall_end; 45bb898558SAl Viro extern const char vdso32_sysenter_start, vdso32_sysenter_end; 46bb898558SAl Viro 47*1965aae3SH. Peter Anvin #endif /* _ASM_X86_VDSO_H */ 48