/* * linux/arch/ppc64/kernel/sys_ppc.c * *  PowerPC version  *    Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org) * * Derived from "arch/i386/kernel/sys_i386.c" * Adapted from the i386 version by Gary Thomas * Modified by Cort Dougan (cort@cs.nmt.edu) * and Paul Mackerras (paulus@cs.anu.edu.au). * * This file contains various random system calls that * have a non-standard calling sequence on the Linux/PPC * platform. * *  This program is free software; you can redistribute it and/or *  modify it under the terms of the GNU General Public License *  as published by the Free Software Foundation; either version *  2 of the License, or (at your option) any later version. * */ #include <linux/errno.h>#include <linux/sched.h>#include <linux/syscalls.h>#include <linux/mm.h>#include <linux/smp.h>#include <linux/smp_lock.h>#include <linux/sem.h>#include <linux/msg.h>#include <linux/shm.h>#include <linux/stat.h>#include <linux/mman.h>#include <linux/sys.h>#include <linux/ipc.h>#include <linux/utsname.h>#include <linux/file.h>#include <linux/init.h>#include <linux/personality.h> #include <asm/uaccess.h>#include <asm/ipc.h>#include <asm/semaphore.h>#include <asm/time.h>#include <asm/unistd.h> extern unsigned long wall_jiffies; voidcheck_bugs(void){} /* * sys_ipc() is the de-multiplexer for the SysV IPC calls.. * * This is really horribly ugly. */asmlinkage int sys_ipc (uint call, int first, unsigned long second, long third,	 void __user *ptr, long fifth){	int version, ret; 	version = call >> 16; /* hack for backward compatibility */	call &= 0xffff; 	ret = -ENOSYS;	switch (call) {	case SEMOP:		ret = sys_semtimedop(first, (struct sembuf __user *)ptr,				      (unsigned)second, NULL);		break;	case SEMTIMEDOP:		ret = sys_semtimedop(first, (struct sembuf __user *)ptr,				      (unsigned)second,				      (const struct timespec __user *) fifth);		break;	case SEMGET:		ret = sys_semget (first, (int)second, third);		break;	case SEMCTL: {		union semun fourth; 		ret = -EINVAL;		if (!ptr)			break;		if ((ret = get_user(fourth.__pad, (void __user * __user *)ptr)))			break;		ret = sys_semctl(first, (int)second, third, fourth);		break;	}	case MSGSND:		ret = sys_msgsnd(first, (struct msgbuf __user *)ptr,				  (size_t)second, third);		break;	case MSGRCV:		switch (version) {		case 0: {			struct ipc_kludge tmp; 			ret = -EINVAL;			if (!ptr)				break;			if ((ret = copy_from_user(&tmp,						(struct ipc_kludge __user *) ptr,						sizeof (tmp)) ? -EFAULT : 0))				break;			ret = sys_msgrcv(first, tmp.msgp, (size_t) second,					  tmp.msgtyp, third);			break;		}		default:			ret = sys_msgrcv (first, (struct msgbuf __user *) ptr,					  (size_t)second, fifth, third);			break;		}		break;	case MSGGET:		ret = sys_msgget ((key_t)first, (int)second);		break;	case MSGCTL:		ret = sys_msgctl(first, (int)second,				  (struct msqid_ds __user *)ptr);		break;	case SHMAT:		switch (version) {		default: {			ulong raddr;			ret = do_shmat(first, (char __user *) ptr,					(int)second, &raddr);			if (ret)				break;			ret = put_user (raddr, (ulong __user *) third);			break;		}		case 1:	/* iBCS2 emulator entry point */			ret = -EINVAL;			if (!segment_eq(get_fs(), get_ds()))				break;			ret = do_shmat(first, (char __user *)ptr,					(int)second, (ulong *)third);			break;		}		break;	case SHMDT: 		ret = sys_shmdt ((char __user *)ptr);		break;	case SHMGET:		ret = sys_shmget (first, (size_t)second, third);		break;	case SHMCTL:		ret = sys_shmctl(first, (int)second,				  (struct shmid_ds __user *)ptr);		break;	} 	return ret;} /* * sys_pipe() is the normal C calling standard for creating * a pipe. It's not the way unix traditionally does this, though. */asmlinkage int sys_pipe(int __user *fildes){	int fd[2];	int error;		error = do_pipe(fd);	if (!error) {		if (copy_to_user(fildes, fd, 2*sizeof(int)))			error = -EFAULT;	}		return error;} unsigned long sys_mmap(unsigned long addr, size_t len,		       unsigned long prot, unsigned long flags,		       unsigned long fd, off_t offset){	struct file * file = NULL;	unsigned long ret = -EBADF; 	if (!(flags & MAP_ANONYMOUS)) {		if (!(file = fget(fd)))			goto out;	} 	flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);	down_write(&current->mm->mmap_sem);	ret = do_mmap(file, addr, len, prot, flags, offset);	up_write(&current->mm->mmap_sem);	if (file)		fput(file); out:	return ret;} long ppc64_personality(unsigned long personality){	long ret; 	if (personality(current->personality) == PER_LINUX32	    && personality == PER_LINUX)		personality = PER_LINUX32;	ret = sys_personality(personality);	if (ret == PER_LINUX32)		ret = PER_LINUX;	return ret;} long ppc64_newuname(struct new_utsname __user * name){	int err = 0; 	down_read(&uts_sem);	if (copy_to_user(name, &system_utsname, sizeof(*name)))		err = -EFAULT;	up_read(&uts_sem);	if (!err && personality(current->personality) == PER_LINUX32) {		/* change ppc64 to ppc */		if (__put_user(0, name->machine + 3)		    || __put_user(0, name->machine + 4))			err = -EFAULT;	}	return err;} asmlinkage time_t sys64_time(time_t __user * tloc){	time_t secs;	time_t usecs; 	long tb_delta = tb_ticks_since(tb_last_stamp);	tb_delta += (jiffies - wall_jiffies) * tb_ticks_per_jiffy; 	secs  = xtime.tv_sec;  	usecs = (xtime.tv_nsec/1000) + tb_delta / tb_ticks_per_usec;	while (usecs >= USEC_PER_SEC) {		++secs;		usecs -= USEC_PER_SEC;	} 	if (tloc) {		if (put_user(secs,tloc))			secs = -EFAULT;	} 	return secs;} void do_show_syscall(unsigned long r3, unsigned long r4, unsigned long r5,		     unsigned long r6, unsigned long r7, unsigned long r8,		     struct pt_regs *regs){	printk("syscall %ld(%lx, %lx, %lx, %lx, %lx, %lx) regs=%p current=%p"	       " cpu=%d\n", regs->gpr[0], r3, r4, r5, r6, r7, r8, regs,	       current, smp_processor_id());} void do_show_syscall_exit(unsigned long r3){	printk(" -> %lx, current=%p cpu=%d\n", r3, current, smp_processor_id());}