69 static void warn_bad_vsyscall(const char *level, struct pt_regs *regs,  in warn_bad_vsyscall()  argument
77 			   message, regs->ip, regs->cs,  in warn_bad_vsyscall()
78 			   regs->sp, regs->ax, regs->si, regs->di);  in warn_bad_vsyscall()
123 bool emulate_vsyscall(struct pt_regs *regs, unsigned long address)  in emulate_vsyscall()  argument
136 	WARN_ON_ONCE(address != regs->ip);  in emulate_vsyscall()
139 		warn_bad_vsyscall(KERN_INFO, regs,  in emulate_vsyscall()
149 		warn_bad_vsyscall(KERN_WARNING, regs,  in emulate_vsyscall()
154 	if (get_user(caller, (unsigned long __user *)regs->sp) != 0) {  in emulate_vsyscall()
155 		warn_bad_vsyscall(KERN_WARNING, regs,  in emulate_vsyscall()
172 		if (!write_ok_or_segv(regs->di, sizeof(struct timeval)) ||  in emulate_vsyscall()
173 		    !write_ok_or_segv(regs->si, sizeof(struct timezone))) {  in emulate_vsyscall()
182 		if (!write_ok_or_segv(regs->di, sizeof(time_t))) {  in emulate_vsyscall()
191 		if (!write_ok_or_segv(regs->di, sizeof(unsigned)) ||  in emulate_vsyscall()
192 		    !write_ok_or_segv(regs->si, sizeof(unsigned))) {  in emulate_vsyscall()
208 	regs->orig_ax = syscall_nr;  in emulate_vsyscall()
209 	regs->ax = -ENOSYS;  in emulate_vsyscall()
211 	if ((!tmp && regs->orig_ax != syscall_nr) || regs->ip != address) {  in emulate_vsyscall()
212 		warn_bad_vsyscall(KERN_DEBUG, regs,  in emulate_vsyscall()
216 	regs->orig_ax = -1;  in emulate_vsyscall()
231 			(struct timeval __user *)regs->di,  in emulate_vsyscall()
232 			(struct timezone __user *)regs->si);  in emulate_vsyscall()
236 		ret = sys_time((time_t __user *)regs->di);  in emulate_vsyscall()
240 		ret = sys_getcpu((unsigned __user *)regs->di,  in emulate_vsyscall()
241 				 (unsigned __user *)regs->si,  in emulate_vsyscall()
251 		warn_bad_vsyscall(KERN_INFO, regs,  in emulate_vsyscall()
265 	regs->ax = ret;  in emulate_vsyscall()
269 	regs->ip = caller;  in emulate_vsyscall()
270 	regs->sp += 8;  in emulate_vsyscall()