62 static void warn_bad_vsyscall(const char *level, struct pt_regs *regs,  in warn_bad_vsyscall()  argument
70 			   message, regs->ip, regs->cs,  in warn_bad_vsyscall()
71 			   regs->sp, regs->ax, regs->si, regs->di);  in warn_bad_vsyscall()
116 bool emulate_vsyscall(struct pt_regs *regs, unsigned long address)  in emulate_vsyscall()  argument
129 	WARN_ON_ONCE(address != regs->ip);  in emulate_vsyscall()
132 		warn_bad_vsyscall(KERN_INFO, regs,  in emulate_vsyscall()
142 		warn_bad_vsyscall(KERN_WARNING, regs,  in emulate_vsyscall()
147 	if (get_user(caller, (unsigned long __user *)regs->sp) != 0) {  in emulate_vsyscall()
148 		warn_bad_vsyscall(KERN_WARNING, regs,  in emulate_vsyscall()
165 		if (!write_ok_or_segv(regs->di, sizeof(struct timeval)) ||  in emulate_vsyscall()
166 		    !write_ok_or_segv(regs->si, sizeof(struct timezone))) {  in emulate_vsyscall()
175 		if (!write_ok_or_segv(regs->di, sizeof(time_t))) {  in emulate_vsyscall()
184 		if (!write_ok_or_segv(regs->di, sizeof(unsigned)) ||  in emulate_vsyscall()
185 		    !write_ok_or_segv(regs->si, sizeof(unsigned))) {  in emulate_vsyscall()
201 	regs->orig_ax = syscall_nr;  in emulate_vsyscall()
202 	regs->ax = -ENOSYS;  in emulate_vsyscall()
204 	if ((!tmp && regs->orig_ax != syscall_nr) || regs->ip != address) {  in emulate_vsyscall()
205 		warn_bad_vsyscall(KERN_DEBUG, regs,  in emulate_vsyscall()
209 	regs->orig_ax = -1;  in emulate_vsyscall()
224 			(struct timeval __user *)regs->di,  in emulate_vsyscall()
225 			(struct timezone __user *)regs->si);  in emulate_vsyscall()
229 		ret = sys_time((time_t __user *)regs->di);  in emulate_vsyscall()
233 		ret = sys_getcpu((unsigned __user *)regs->di,  in emulate_vsyscall()
234 				 (unsigned __user *)regs->si,  in emulate_vsyscall()
244 		warn_bad_vsyscall(KERN_INFO, regs,  in emulate_vsyscall()
258 	regs->ax = ret;  in emulate_vsyscall()
262 	regs->ip = caller;  in emulate_vsyscall()
263 	regs->sp += 8;  in emulate_vsyscall()