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/mtrr.h>
  16 #include <asm/ia32.h>
  17
  18 #define CODE
  19 #include "compat_ioctl.c"
  20
  21 #ifndef TIOCGDEV
  22 #define TIOCGDEV       _IOR('T',0x32, unsigned int)
  23 #endif
  24 static int tiocgdev(unsigned fd, unsigned cmd,  unsigned int __user *ptr)
  25 {
  26
  27         struct file *file = fget(fd);
  28         struct tty_struct *real_tty;
  29
  30         if (!file)
  31                 return -EBADF;
  32         if (file->f_op->ioctl != tty_ioctl)
  33                 return -EINVAL;
  34         real_tty = (struct tty_struct *)file->private_data;
  35         if (!real_tty)
  36                 return -EINVAL;
  37         return put_user(new_encode_dev(tty_devnum(real_tty)), ptr);
  38 }
  39
  40 #define RTC_IRQP_READ32 _IOR('p', 0x0b, unsigned int)    /* Read IRQ rate   */
  41 #define RTC_IRQP_SET32  _IOW('p', 0x0c, unsigned int)    /* Set IRQ rate    */
  42 #define RTC_EPOCH_READ32        _IOR('p', 0x0d, unsigned)        /* Read epoch      */
  43 #define RTC_EPOCH_SET32         _IOW('p', 0x0e, unsigned)        /* Set epoch       */
  44
  45 static int rtc32_ioctl(unsigned fd, unsigned cmd, unsigned long arg)
  46 {
  47         unsigned long val;
  48         mm_segment_t oldfs = get_fs();
  49         int ret;
  50
  51         switch (cmd) {
  52         case RTC_IRQP_READ32:
  53                 set_fs(KERNEL_DS);
  54                 ret = sys_ioctl(fd, RTC_IRQP_READ, (unsigned long)&val);
  55                 set_fs(oldfs);
  56                 if (!ret)
  57                         ret = put_user(val, (unsigned int __user *) arg);
  58                 return ret;
  59
  60         case RTC_IRQP_SET32:
  61                 cmd = RTC_IRQP_SET;
  62                 break;
  63
  64         case RTC_EPOCH_READ32:
  65                 set_fs(KERNEL_DS);
  66                 ret = sys_ioctl(fd, RTC_EPOCH_READ, (unsigned long) &val);
  67                 set_fs(oldfs);
  68                 if (!ret)
  69                         ret = put_user(val, (unsigned int __user *) arg);
  70                 return ret;
  71
  72         case RTC_EPOCH_SET32:
  73                 cmd = RTC_EPOCH_SET;
  74                 break;
  75         }
  76         return sys_ioctl(fd,cmd,arg);
  77 }
  78
  79 /* /proc/mtrr ioctls */
  80
  81
  82 struct mtrr_sentry32
  83 {
  84     compat_ulong_t base;    /*  Base address     */
  85     compat_uint_t size;    /*  Size of region   */
  86     compat_uint_t type;     /*  Type of region   */
  87 };
  88
  89 struct mtrr_gentry32
  90 {
  91     compat_ulong_t regnum;   /*  Register number  */
  92     compat_uint_t base;    /*  Base address     */
  93     compat_uint_t size;    /*  Size of region   */
  94     compat_uint_t type;     /*  Type of region   */
  95 };
  96
  97 #define MTRR_IOCTL_BASE 'M'
  98
  99 #define MTRRIOC32_ADD_ENTRY        _IOW(MTRR_IOCTL_BASE,  0, struct mtrr_sentry32)
 100 #define MTRRIOC32_SET_ENTRY        _IOW(MTRR_IOCTL_BASE,  1, struct mtrr_sentry32)
 101 #define MTRRIOC32_DEL_ENTRY        _IOW(MTRR_IOCTL_BASE,  2, struct mtrr_sentry32)
 102 #define MTRRIOC32_GET_ENTRY        _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry32)
 103 #define MTRRIOC32_KILL_ENTRY       _IOW(MTRR_IOCTL_BASE,  4, struct mtrr_sentry32)
 104 #define MTRRIOC32_ADD_PAGE_ENTRY   _IOW(MTRR_IOCTL_BASE,  5, struct mtrr_sentry32)
 105 #define MTRRIOC32_SET_PAGE_ENTRY   _IOW(MTRR_IOCTL_BASE,  6, struct mtrr_sentry32)
 106 #define MTRRIOC32_DEL_PAGE_ENTRY   _IOW(MTRR_IOCTL_BASE,  7, struct mtrr_sentry32)
 107 #define MTRRIOC32_GET_PAGE_ENTRY   _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry32)
 108 #define MTRRIOC32_KILL_PAGE_ENTRY  _IOW(MTRR_IOCTL_BASE,  9, struct mtrr_sentry32)
 109
 110
 111 static int mtrr_ioctl32(unsigned int fd, unsigned int cmd, unsigned long arg)
 112 {
 113         struct mtrr_gentry g;
 114         struct mtrr_sentry s;
 115         int get = 0, err = 0;
 116         struct mtrr_gentry32 __user *g32 = (struct mtrr_gentry32 __user *)arg;
 117         mm_segment_t oldfs = get_fs();
 118
 119         switch (cmd) {
 120 #define SET(x) case MTRRIOC32_ ## x ## _ENTRY: cmd = MTRRIOC_ ## x ## _ENTRY; break
 121 #define GET(x) case MTRRIOC32_ ## x ## _ENTRY: cmd = MTRRIOC_ ## x ## _ENTRY; get=1; break
 122                 SET(ADD);
 123                 SET(SET);
 124                 SET(DEL);
 125                 GET(GET);
 126                 SET(KILL);
 127                 SET(ADD_PAGE);
 128                 SET(SET_PAGE);
 129                 SET(DEL_PAGE);
 130                 GET(GET_PAGE);
 131                 SET(KILL_PAGE);
 132         }
 133
 134         if (get) {
 135                 err = get_user(g.regnum, &g32->regnum);
 136                 err |= get_user(g.base, &g32->base);
 137                 err |= get_user(g.size, &g32->size);
 138                 err |= get_user(g.type, &g32->type);
 139
 140                 arg = (unsigned long)&g;
 141         } else {
 142                 struct mtrr_sentry32 __user *s32 = (struct mtrr_sentry32 __user *)arg;
 143                 err = get_user(s.base, &s32->base);
 144                 err |= get_user(s.size, &s32->size);
 145                 err |= get_user(s.type, &s32->type);
 146
 147                 arg = (unsigned long)&s;
 148         }
 149         if (err) return err;
 150
 151         set_fs(KERNEL_DS);
 152         err = sys_ioctl(fd, cmd, arg);
 153         set_fs(oldfs);
 154
 155         if (!err && get) {
 156                 err = put_user(g.base, &g32->base);
 157                 err |= put_user(g.size, &g32->size);
 158                 err |= put_user(g.regnum, &g32->regnum);
 159                 err |= put_user(g.type, &g32->type);
 160         }
 161         return err;
 162 }
 163
 164 #define HANDLE_IOCTL(cmd,handler) { (cmd), (ioctl_trans_handler_t)(handler) },
 165 #define COMPATIBLE_IOCTL(cmd) HANDLE_IOCTL(cmd,sys_ioctl)
 166
 167 struct ioctl_trans ioctl_start[] = {
 168 #include <linux/compat_ioctl.h>
 169 #define DECLARES
 170 #include "compat_ioctl.c"
 171 COMPATIBLE_IOCTL(HDIO_SET_KEEPSETTINGS)
 172 COMPATIBLE_IOCTL(HDIO_SCAN_HWIF)
 173 COMPATIBLE_IOCTL(BLKRASET)
 174 COMPATIBLE_IOCTL(0x4B50)   /* KDGHWCLK - not in the kernel, but don't complain */
 175 COMPATIBLE_IOCTL(0x4B51)   /* KDSHWCLK - not in the kernel, but don't complain */
 176 COMPATIBLE_IOCTL(FIOQSIZE)
 177
 178 /* And these ioctls need translation */
 179 HANDLE_IOCTL(TIOCGDEV, tiocgdev)
 180 /* realtime device */
 181 HANDLE_IOCTL(RTC_IRQP_READ,  rtc32_ioctl)
 182 HANDLE_IOCTL(RTC_IRQP_READ32,rtc32_ioctl)
 183 HANDLE_IOCTL(RTC_IRQP_SET32, rtc32_ioctl)
 184 HANDLE_IOCTL(RTC_EPOCH_READ32, rtc32_ioctl)
 185 HANDLE_IOCTL(RTC_EPOCH_SET32, rtc32_ioctl)
 186 /* take care of sizeof(sizeof()) breakage */
 187 /* mtrr */
 188 HANDLE_IOCTL(MTRRIOC32_ADD_ENTRY, mtrr_ioctl32)
 189 HANDLE_IOCTL(MTRRIOC32_SET_ENTRY, mtrr_ioctl32)
 190 HANDLE_IOCTL(MTRRIOC32_DEL_ENTRY, mtrr_ioctl32)
 191 HANDLE_IOCTL(MTRRIOC32_GET_ENTRY, mtrr_ioctl32)
 192 HANDLE_IOCTL(MTRRIOC32_KILL_ENTRY, mtrr_ioctl32)
 193 HANDLE_IOCTL(MTRRIOC32_ADD_PAGE_ENTRY, mtrr_ioctl32)
 194 HANDLE_IOCTL(MTRRIOC32_SET_PAGE_ENTRY, mtrr_ioctl32)
 195 HANDLE_IOCTL(MTRRIOC32_DEL_PAGE_ENTRY, mtrr_ioctl32)
 196 HANDLE_IOCTL(MTRRIOC32_GET_PAGE_ENTRY, mtrr_ioctl32)
 197 HANDLE_IOCTL(MTRRIOC32_KILL_PAGE_ENTRY, mtrr_ioctl32)
 198 };
 199
 200 int ioctl_table_size = ARRAY_SIZE(ioctl_start);
 201