273 lines
6.9 KiB
C
273 lines
6.9 KiB
C
/*
|
|
* arch/ppc/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/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/syscalls.h>
|
|
#include <linux/mman.h>
|
|
#include <linux/sys.h>
|
|
#include <linux/ipc.h>
|
|
#include <linux/utsname.h>
|
|
#include <linux/file.h>
|
|
#include <linux/unistd.h>
|
|
|
|
#include <asm/uaccess.h>
|
|
#include <asm/ipc.h>
|
|
#include <asm/semaphore.h>
|
|
|
|
void
|
|
check_bugs(void)
|
|
{
|
|
}
|
|
|
|
/*
|
|
* sys_ipc() is the de-multiplexer for the SysV IPC calls..
|
|
*
|
|
* This is really horribly ugly.
|
|
*/
|
|
int
|
|
sys_ipc (uint call, int first, int second, int 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,
|
|
second, NULL);
|
|
break;
|
|
case SEMTIMEDOP:
|
|
ret = sys_semtimedop (first, (struct sembuf __user *)ptr,
|
|
second, (const struct timespec __user *) fifth);
|
|
break;
|
|
case SEMGET:
|
|
ret = sys_semget (first, second, third);
|
|
break;
|
|
case SEMCTL: {
|
|
union semun fourth;
|
|
|
|
if (!ptr)
|
|
break;
|
|
if ((ret = access_ok(VERIFY_READ, ptr, sizeof(long)) ? 0 : -EFAULT)
|
|
|| (ret = get_user(fourth.__pad, (void __user *__user *)ptr)))
|
|
break;
|
|
ret = sys_semctl (first, second, third, fourth);
|
|
break;
|
|
}
|
|
case MSGSND:
|
|
ret = sys_msgsnd (first, (struct msgbuf __user *) ptr, second, third);
|
|
break;
|
|
case MSGRCV:
|
|
switch (version) {
|
|
case 0: {
|
|
struct ipc_kludge tmp;
|
|
|
|
if (!ptr)
|
|
break;
|
|
if ((ret = access_ok(VERIFY_READ, ptr, sizeof(tmp)) ? 0 : -EFAULT)
|
|
|| (ret = copy_from_user(&tmp,
|
|
(struct ipc_kludge __user *) ptr,
|
|
sizeof (tmp)) ? -EFAULT : 0))
|
|
break;
|
|
ret = sys_msgrcv (first, tmp.msgp, second, tmp.msgtyp,
|
|
third);
|
|
break;
|
|
}
|
|
default:
|
|
ret = sys_msgrcv (first, (struct msgbuf __user *) ptr,
|
|
second, fifth, third);
|
|
break;
|
|
}
|
|
break;
|
|
case MSGGET:
|
|
ret = sys_msgget ((key_t) first, second);
|
|
break;
|
|
case MSGCTL:
|
|
ret = sys_msgctl (first, second, (struct msqid_ds __user *) ptr);
|
|
break;
|
|
case SHMAT: {
|
|
ulong raddr;
|
|
|
|
if ((ret = access_ok(VERIFY_WRITE, (ulong __user *) third,
|
|
sizeof(ulong)) ? 0 : -EFAULT))
|
|
break;
|
|
ret = do_shmat (first, (char __user *) ptr, second, &raddr);
|
|
if (ret)
|
|
break;
|
|
ret = put_user (raddr, (ulong __user *) third);
|
|
break;
|
|
}
|
|
case SHMDT:
|
|
ret = sys_shmdt ((char __user *)ptr);
|
|
break;
|
|
case SHMGET:
|
|
ret = sys_shmget (first, second, third);
|
|
break;
|
|
case SHMCTL:
|
|
ret = sys_shmctl (first, 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.
|
|
*/
|
|
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;
|
|
}
|
|
|
|
static inline unsigned long
|
|
do_mmap2(unsigned long addr, size_t len,
|
|
unsigned long prot, unsigned long flags,
|
|
unsigned long fd, unsigned long pgoff)
|
|
{
|
|
struct file * file = NULL;
|
|
int ret = -EBADF;
|
|
|
|
flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
|
|
if (!(flags & MAP_ANONYMOUS)) {
|
|
if (!(file = fget(fd)))
|
|
goto out;
|
|
}
|
|
|
|
down_write(¤t->mm->mmap_sem);
|
|
ret = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
|
|
up_write(¤t->mm->mmap_sem);
|
|
if (file)
|
|
fput(file);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
unsigned long sys_mmap2(unsigned long addr, size_t len,
|
|
unsigned long prot, unsigned long flags,
|
|
unsigned long fd, unsigned long pgoff)
|
|
{
|
|
return do_mmap2(addr, len, prot, flags, fd, pgoff);
|
|
}
|
|
|
|
unsigned long sys_mmap(unsigned long addr, size_t len,
|
|
unsigned long prot, unsigned long flags,
|
|
unsigned long fd, off_t offset)
|
|
{
|
|
int err = -EINVAL;
|
|
|
|
if (offset & ~PAGE_MASK)
|
|
goto out;
|
|
|
|
err = do_mmap2(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* Due to some executables calling the wrong select we sometimes
|
|
* get wrong args. This determines how the args are being passed
|
|
* (a single ptr to them all args passed) then calls
|
|
* sys_select() with the appropriate args. -- Cort
|
|
*/
|
|
int
|
|
ppc_select(int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp, struct timeval __user *tvp)
|
|
{
|
|
if ( (unsigned long)n >= 4096 )
|
|
{
|
|
unsigned long __user *buffer = (unsigned long __user *)n;
|
|
if (!access_ok(VERIFY_READ, buffer, 5*sizeof(unsigned long))
|
|
|| __get_user(n, buffer)
|
|
|| __get_user(inp, ((fd_set __user * __user *)(buffer+1)))
|
|
|| __get_user(outp, ((fd_set __user * __user *)(buffer+2)))
|
|
|| __get_user(exp, ((fd_set __user * __user *)(buffer+3)))
|
|
|| __get_user(tvp, ((struct timeval __user * __user *)(buffer+4))))
|
|
return -EFAULT;
|
|
}
|
|
return sys_select(n, inp, outp, exp, tvp);
|
|
}
|
|
|
|
int sys_uname(struct old_utsname __user * name)
|
|
{
|
|
int err = -EFAULT;
|
|
|
|
down_read(&uts_sem);
|
|
if (name && !copy_to_user(name, &system_utsname, sizeof (*name)))
|
|
err = 0;
|
|
up_read(&uts_sem);
|
|
return err;
|
|
}
|
|
|
|
int sys_olduname(struct oldold_utsname __user * name)
|
|
{
|
|
int error;
|
|
|
|
if (!name)
|
|
return -EFAULT;
|
|
if (!access_ok(VERIFY_WRITE,name,sizeof(struct oldold_utsname)))
|
|
return -EFAULT;
|
|
|
|
down_read(&uts_sem);
|
|
error = __copy_to_user(&name->sysname,&system_utsname.sysname,__OLD_UTS_LEN);
|
|
error -= __put_user(0,name->sysname+__OLD_UTS_LEN);
|
|
error -= __copy_to_user(&name->nodename,&system_utsname.nodename,__OLD_UTS_LEN);
|
|
error -= __put_user(0,name->nodename+__OLD_UTS_LEN);
|
|
error -= __copy_to_user(&name->release,&system_utsname.release,__OLD_UTS_LEN);
|
|
error -= __put_user(0,name->release+__OLD_UTS_LEN);
|
|
error -= __copy_to_user(&name->version,&system_utsname.version,__OLD_UTS_LEN);
|
|
error -= __put_user(0,name->version+__OLD_UTS_LEN);
|
|
error -= __copy_to_user(&name->machine,&system_utsname.machine,__OLD_UTS_LEN);
|
|
error = __put_user(0,name->machine+__OLD_UTS_LEN);
|
|
up_read(&uts_sem);
|
|
|
|
error = error ? -EFAULT : 0;
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* We put the arguments in a different order so we only use 6
|
|
* registers for arguments, rather than 7 as sys_fadvise64_64 needs
|
|
* (because `offset' goes in r5/r6).
|
|
*/
|
|
long ppc_fadvise64_64(int fd, int advice, loff_t offset, loff_t len)
|
|
{
|
|
return sys_fadvise64_64(fd, offset, len, advice);
|
|
}
|