11965aae3SH. Peter Anvin #ifndef _ASM_X86_VDSO_H 21965aae3SH. Peter Anvin #define _ASM_X86_VDSO_H 3bb898558SAl Viro 4bb898558SAl Viro #if defined CONFIG_X86_32 || defined CONFIG_COMPAT 5bb898558SAl Viro /* 6bb898558SAl Viro * Given a pointer to the vDSO image, find the pointer to VDSO32_name 7bb898558SAl Viro * as that symbol is defined in the vDSO sources or linker script. 8bb898558SAl Viro */ 9bb898558SAl Viro #define VDSO32_SYMBOL(base, name) \ 10bb898558SAl Viro ({ \ 11bb898558SAl Viro extern const char VDSO32_##name[]; \ 12b0b49f26SAndy Lutomirski (void __user *)(VDSO32_##name + (unsigned long)(base)); \ 13bb898558SAl Viro }) 14bb898558SAl Viro #endif 15bb898558SAl Viro 16bb898558SAl Viro /* 17bb898558SAl Viro * These symbols are defined with the addresses in the vsyscall page. 18bb898558SAl Viro * See vsyscall-sigreturn.S. 19bb898558SAl Viro */ 20bb898558SAl Viro extern void __user __kernel_sigreturn; 21bb898558SAl Viro extern void __user __kernel_rt_sigreturn; 22bb898558SAl Viro 23bb898558SAl Viro /* 24bb898558SAl Viro * These symbols are defined by vdso32.S to mark the bounds 25bb898558SAl Viro * of the ELF DSO images included therein. 26bb898558SAl Viro */ 27bb898558SAl Viro extern const char vdso32_int80_start, vdso32_int80_end; 28bb898558SAl Viro extern const char vdso32_syscall_start, vdso32_syscall_end; 29bb898558SAl Viro extern const char vdso32_sysenter_start, vdso32_sysenter_end; 30bb898558SAl Viro 31*b4b541a6SAndy Lutomirski void __init patch_vdso32(void *vdso, size_t len); 32*b4b541a6SAndy Lutomirski 331965aae3SH. Peter Anvin #endif /* _ASM_X86_VDSO_H */ 34