268 lines
6.3 KiB
C
268 lines
6.3 KiB
C
/*
|
|
* arch/s390/kernel/sys_s390.c
|
|
*
|
|
* S390 version
|
|
* Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
|
|
* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
|
|
* Thomas Spatzier (tspat@de.ibm.com)
|
|
*
|
|
* Derived from "arch/i386/kernel/sys_i386.c"
|
|
*
|
|
* This file contains various random system calls that
|
|
* have a non-standard calling sequence on the Linux/s390
|
|
* platform.
|
|
*/
|
|
|
|
#include <linux/errno.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/smp.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/file.h>
|
|
#include <linux/utsname.h>
|
|
#include <linux/personality.h>
|
|
#include <linux/unistd.h>
|
|
|
|
#include <asm/uaccess.h>
|
|
#include <asm/ipc.h>
|
|
|
|
/*
|
|
* sys_pipe() is the normal C calling standard for creating
|
|
* a pipe. It's not the way Unix traditionally does this, though.
|
|
*/
|
|
asmlinkage long sys_pipe(unsigned long __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;
|
|
}
|
|
|
|
/* common code for old and new mmaps */
|
|
static inline long do_mmap2(
|
|
unsigned long addr, unsigned long len,
|
|
unsigned long prot, unsigned long flags,
|
|
unsigned long fd, unsigned long pgoff)
|
|
{
|
|
long error = -EBADF;
|
|
struct file * file = NULL;
|
|
|
|
flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
|
|
if (!(flags & MAP_ANONYMOUS)) {
|
|
file = fget(fd);
|
|
if (!file)
|
|
goto out;
|
|
}
|
|
|
|
down_write(¤t->mm->mmap_sem);
|
|
error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
|
|
up_write(¤t->mm->mmap_sem);
|
|
|
|
if (file)
|
|
fput(file);
|
|
out:
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Perform the select(nd, in, out, ex, tv) and mmap() system
|
|
* calls. Linux for S/390 isn't able to handle more than 5
|
|
* system call parameters, so these system calls used a memory
|
|
* block for parameter passing..
|
|
*/
|
|
|
|
struct mmap_arg_struct {
|
|
unsigned long addr;
|
|
unsigned long len;
|
|
unsigned long prot;
|
|
unsigned long flags;
|
|
unsigned long fd;
|
|
unsigned long offset;
|
|
};
|
|
|
|
asmlinkage long sys_mmap2(struct mmap_arg_struct __user *arg)
|
|
{
|
|
struct mmap_arg_struct a;
|
|
int error = -EFAULT;
|
|
|
|
if (copy_from_user(&a, arg, sizeof(a)))
|
|
goto out;
|
|
error = do_mmap2(a.addr, a.len, a.prot, a.flags, a.fd, a.offset);
|
|
out:
|
|
return error;
|
|
}
|
|
|
|
asmlinkage long old_mmap(struct mmap_arg_struct __user *arg)
|
|
{
|
|
struct mmap_arg_struct a;
|
|
long error = -EFAULT;
|
|
|
|
if (copy_from_user(&a, arg, sizeof(a)))
|
|
goto out;
|
|
|
|
error = -EINVAL;
|
|
if (a.offset & ~PAGE_MASK)
|
|
goto out;
|
|
|
|
error = do_mmap2(a.addr, a.len, a.prot, a.flags, a.fd, a.offset >> PAGE_SHIFT);
|
|
out:
|
|
return error;
|
|
}
|
|
|
|
#ifndef CONFIG_64BIT
|
|
struct sel_arg_struct {
|
|
unsigned long n;
|
|
fd_set __user *inp, *outp, *exp;
|
|
struct timeval __user *tvp;
|
|
};
|
|
|
|
asmlinkage long old_select(struct sel_arg_struct __user *arg)
|
|
{
|
|
struct sel_arg_struct a;
|
|
|
|
if (copy_from_user(&a, arg, sizeof(a)))
|
|
return -EFAULT;
|
|
/* sys_select() does the appropriate kernel locking */
|
|
return sys_select(a.n, a.inp, a.outp, a.exp, a.tvp);
|
|
|
|
}
|
|
#endif /* CONFIG_64BIT */
|
|
|
|
/*
|
|
* sys_ipc() is the de-multiplexer for the SysV IPC calls..
|
|
*
|
|
* This is really horribly ugly.
|
|
*/
|
|
asmlinkage long sys_ipc(uint call, int first, unsigned long second,
|
|
unsigned long third, void __user *ptr)
|
|
{
|
|
struct ipc_kludge tmp;
|
|
int ret;
|
|
|
|
switch (call) {
|
|
case SEMOP:
|
|
return sys_semtimedop(first, (struct sembuf __user *)ptr,
|
|
(unsigned)second, NULL);
|
|
case SEMTIMEDOP:
|
|
return sys_semtimedop(first, (struct sembuf __user *)ptr,
|
|
(unsigned)second,
|
|
(const struct timespec __user *) third);
|
|
case SEMGET:
|
|
return sys_semget(first, (int)second, third);
|
|
case SEMCTL: {
|
|
union semun fourth;
|
|
if (!ptr)
|
|
return -EINVAL;
|
|
if (get_user(fourth.__pad, (void __user * __user *) ptr))
|
|
return -EFAULT;
|
|
return sys_semctl(first, (int)second, third, fourth);
|
|
}
|
|
case MSGSND:
|
|
return sys_msgsnd (first, (struct msgbuf __user *) ptr,
|
|
(size_t)second, third);
|
|
break;
|
|
case MSGRCV:
|
|
if (!ptr)
|
|
return -EINVAL;
|
|
if (copy_from_user (&tmp, (struct ipc_kludge __user *) ptr,
|
|
sizeof (struct ipc_kludge)))
|
|
return -EFAULT;
|
|
return sys_msgrcv (first, tmp.msgp,
|
|
(size_t)second, tmp.msgtyp, third);
|
|
case MSGGET:
|
|
return sys_msgget((key_t)first, (int)second);
|
|
case MSGCTL:
|
|
return sys_msgctl(first, (int)second,
|
|
(struct msqid_ds __user *)ptr);
|
|
|
|
case SHMAT: {
|
|
ulong raddr;
|
|
ret = do_shmat(first, (char __user *)ptr,
|
|
(int)second, &raddr);
|
|
if (ret)
|
|
return ret;
|
|
return put_user (raddr, (ulong __user *) third);
|
|
break;
|
|
}
|
|
case SHMDT:
|
|
return sys_shmdt ((char __user *)ptr);
|
|
case SHMGET:
|
|
return sys_shmget(first, (size_t)second, third);
|
|
case SHMCTL:
|
|
return sys_shmctl(first, (int)second,
|
|
(struct shmid_ds __user *) ptr);
|
|
default:
|
|
return -ENOSYS;
|
|
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
#ifdef CONFIG_64BIT
|
|
asmlinkage long s390x_newuname(struct new_utsname __user *name)
|
|
{
|
|
int ret = sys_newuname(name);
|
|
|
|
if (current->personality == PER_LINUX32 && !ret) {
|
|
ret = copy_to_user(name->machine, "s390\0\0\0\0", 8);
|
|
if (ret) ret = -EFAULT;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
asmlinkage long s390x_personality(unsigned long personality)
|
|
{
|
|
int ret;
|
|
|
|
if (current->personality == PER_LINUX32 && personality == PER_LINUX)
|
|
personality = PER_LINUX32;
|
|
ret = sys_personality(personality);
|
|
if (ret == PER_LINUX32)
|
|
ret = PER_LINUX;
|
|
|
|
return ret;
|
|
}
|
|
#endif /* CONFIG_64BIT */
|
|
|
|
/*
|
|
* Wrapper function for sys_fadvise64/fadvise64_64
|
|
*/
|
|
#ifndef CONFIG_64BIT
|
|
|
|
asmlinkage long
|
|
s390_fadvise64(int fd, u32 offset_high, u32 offset_low, size_t len, int advice)
|
|
{
|
|
return sys_fadvise64(fd, (u64) offset_high << 32 | offset_low,
|
|
len, advice);
|
|
}
|
|
|
|
#endif
|
|
|
|
struct fadvise64_64_args {
|
|
int fd;
|
|
long long offset;
|
|
long long len;
|
|
int advice;
|
|
};
|
|
|
|
asmlinkage long
|
|
s390_fadvise64_64(struct fadvise64_64_args __user *args)
|
|
{
|
|
struct fadvise64_64_args a;
|
|
|
|
if ( copy_from_user(&a, args, sizeof(a)) )
|
|
return -EFAULT;
|
|
return sys_fadvise64_64(a.fd, a.offset, a.len, a.advice);
|
|
}
|