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/* $Id: ioctl32.c,v 1.3 1997/05/27 19:30:13 jj Exp $
* ioctl32.c: Conversion between 32bit and 64bit native ioctls.
*
* Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
*
* These routines maintain argument size conversion between 32bit and 64bit
* ioctls.
*/
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/smp.h>
#include <linux/smp_lock.h>
#include <linux/ioctl.h>
#include <asm/types.h>
#include <asm/uaccess.h>
/* As gcc will warn about casting u32 to some ptr, we have to cast it to unsigned long first, and that's what is A() for.
* You just do (void *)A(x), instead of having to type (void *)((unsigned long)x) or instead of just (void *)x, which will
* produce warnings */
#define A(x) ((unsigned long)x)
extern asmlinkage int sys_ioctl(unsigned int fd, unsigned int cmd, unsigned long arg);
asmlinkage int sys32_ioctl(unsigned int fd, unsigned int cmd, u32 arg)
{
struct file * filp;
int error = -EBADF;
lock_kernel();
if (fd >= NR_OPEN || !(filp = current->files->fd[fd]))
goto out;
if (!filp->f_op || !filp->f_op->ioctl) {
error = sys_ioctl (fd, cmd, (unsigned long)arg);
goto out;
}
error = 0;
switch (cmd) {
default:
error = sys_ioctl (fd, cmd, (unsigned long)arg);
goto out;
}
out:
if (error == -EINVAL) {
printk ("sys32_ioctl on %016lx's %08x returns EINVAL\n", filp->f_op ? (long)filp->f_op->ioctl : 0UL, cmd);
}
unlock_kernel();
return error;
}
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