arch/x86_64/ia32/ia32_ioctl.c

/* $Id: ia32_ioctl.c,v 1.25 2002/10/11 07:17:06 ak Exp $
 * ioctl32.c: Conversion between 32bit and 64bit native ioctls.
 *
 * Copyright (C) 1997-2000  Jakub Jelinek  (jakub@redhat.com)
 * Copyright (C) 1998  Eddie C. Dost  (ecd@skynet.be)
 * Copyright (C) 2001,2002  Andi Kleen, SuSE Labs 
 *
 * These routines maintain argument size conversion between 32bit and 64bit
 * ioctls.
 */

#define INCLUDES
#include <linux/syscalls.h>
#include "compat_ioctl.c"
#include <asm/ia32.h>

#define CODE
#include "compat_ioctl.c"
  
#define RTC_IRQP_READ32	_IOR('p', 0x0b, unsigned int)	 /* Read IRQ rate   */
#define RTC_IRQP_SET32	_IOW('p', 0x0c, unsigned int)	 /* Set IRQ rate    */
#define RTC_EPOCH_READ32	_IOR('p', 0x0d, unsigned)	 /* Read epoch      */
#define RTC_EPOCH_SET32		_IOW('p', 0x0e, unsigned)	 /* Set epoch       */

static int rtc32_ioctl(unsigned fd, unsigned cmd, unsigned long arg) 
{ 
	unsigned long val;
	mm_segment_t oldfs = get_fs(); 
	int ret; 
	
	switch (cmd) { 
	case RTC_IRQP_READ32: 
		set_fs(KERNEL_DS); 
		ret = sys_ioctl(fd, RTC_IRQP_READ, (unsigned long)&val); 
		set_fs(oldfs); 
		if (!ret)
			ret = put_user(val, (unsigned int __user *) arg); 
		return ret; 

	case RTC_IRQP_SET32: 
		cmd = RTC_IRQP_SET; 
		break; 

	case RTC_EPOCH_READ32:
		set_fs(KERNEL_DS); 
		ret = sys_ioctl(fd, RTC_EPOCH_READ, (unsigned long) &val); 
		set_fs(oldfs); 
		if (!ret)
			ret = put_user(val, (unsigned int __user *) arg); 
		return ret; 

	case RTC_EPOCH_SET32:
		cmd = RTC_EPOCH_SET; 
		break; 
	} 
	return sys_ioctl(fd,cmd,arg); 
} 


#define HANDLE_IOCTL(cmd,handler) { (cmd), (ioctl_trans_handler_t)(handler) }, 
#define COMPATIBLE_IOCTL(cmd) HANDLE_IOCTL(cmd,sys_ioctl)

struct ioctl_trans ioctl_start[] = { 
#include <linux/compat_ioctl.h>
#define DECLARES
#include "compat_ioctl.c"

/* And these ioctls need translation */
/* realtime device */
HANDLE_IOCTL(RTC_IRQP_READ,  rtc32_ioctl)
HANDLE_IOCTL(RTC_IRQP_READ32,rtc32_ioctl)
HANDLE_IOCTL(RTC_IRQP_SET32, rtc32_ioctl)
HANDLE_IOCTL(RTC_EPOCH_READ32, rtc32_ioctl)
HANDLE_IOCTL(RTC_EPOCH_SET32, rtc32_ioctl)
/* take care of sizeof(sizeof()) breakage */
}; 

int ioctl_table_size = ARRAY_SIZE(ioctl_start);