arch/x86_64/ia32/ia32_ioctl.c

   1 /* $Id: ia32_ioctl.c,v 1.25 2002/10/11 07:17:06 ak Exp $
   2  * ioctl32.c: Conversion between 32bit and 64bit native ioctls.
   3  *
   4  * Copyright (C) 1997-2000  Jakub Jelinek  (jakub@redhat.com)
   5  * Copyright (C) 1998  Eddie C. Dost  (ecd@skynet.be)
   6  * Copyright (C) 2001,2002  Andi Kleen, SuSE Labs
   7  *
   8  * These routines maintain argument size conversion between 32bit and 64bit
   9  * ioctls.
  10  */
  11
  12 #define INCLUDES
  13 #include <linux/syscalls.h>
  14 #include "compat_ioctl.c"
  15 #include <asm/ia32.h>
  16
  17 #define CODE
  18 #include "compat_ioctl.c"
  19
  20 #define RTC_IRQP_READ32 _IOR('p', 0x0b, unsigned int)    /* Read IRQ rate   */
  21 #define RTC_IRQP_SET32  _IOW('p', 0x0c, unsigned int)    /* Set IRQ rate    */
  22 #define RTC_EPOCH_READ32        _IOR('p', 0x0d, unsigned)        /* Read epoch      */
  23 #define RTC_EPOCH_SET32         _IOW('p', 0x0e, unsigned)        /* Set epoch       */
  24
  25 static int rtc32_ioctl(unsigned fd, unsigned cmd, unsigned long arg)
  26 {
  27         unsigned long val;
  28         mm_segment_t oldfs = get_fs();
  29         int ret;
  30
  31         switch (cmd) {
  32         case RTC_IRQP_READ32:
  33                 set_fs(KERNEL_DS);
  34                 ret = sys_ioctl(fd, RTC_IRQP_READ, (unsigned long)&val);
  35                 set_fs(oldfs);
  36                 if (!ret)
  37                         ret = put_user(val, (unsigned int __user *) arg);
  38                 return ret;
  39
  40         case RTC_IRQP_SET32:
  41                 cmd = RTC_IRQP_SET;
  42                 break;
  43
  44         case RTC_EPOCH_READ32:
  45                 set_fs(KERNEL_DS);
  46                 ret = sys_ioctl(fd, RTC_EPOCH_READ, (unsigned long) &val);
  47                 set_fs(oldfs);
  48                 if (!ret)
  49                         ret = put_user(val, (unsigned int __user *) arg);
  50                 return ret;
  51
  52         case RTC_EPOCH_SET32:
  53                 cmd = RTC_EPOCH_SET;
  54                 break;
  55         }
  56         return sys_ioctl(fd,cmd,arg);
  57 }
  58
  59
  60 #define HANDLE_IOCTL(cmd,handler) { (cmd), (ioctl_trans_handler_t)(handler) },
  61 #define COMPATIBLE_IOCTL(cmd) HANDLE_IOCTL(cmd,sys_ioctl)
  62
  63 struct ioctl_trans ioctl_start[] = {
  64 #include <linux/compat_ioctl.h>
  65 #define DECLARES
  66 #include "compat_ioctl.c"
  67
  68 /* And these ioctls need translation */
  69 /* realtime device */
  70 HANDLE_IOCTL(RTC_IRQP_READ,  rtc32_ioctl)
  71 HANDLE_IOCTL(RTC_IRQP_READ32,rtc32_ioctl)
  72 HANDLE_IOCTL(RTC_IRQP_SET32, rtc32_ioctl)
  73 HANDLE_IOCTL(RTC_EPOCH_READ32, rtc32_ioctl)
  74 HANDLE_IOCTL(RTC_EPOCH_SET32, rtc32_ioctl)
  75 /* take care of sizeof(sizeof()) breakage */
  76 };
  77
  78 int ioctl_table_size = ARRAY_SIZE(ioctl_start);
  79