Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * 32bit -> 64bit ioctl wrapper for hwdep API |
| 3 | * Copyright (c) by Takashi Iwai <tiwai@suse.de> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 18 | * |
| 19 | */ |
| 20 | |
| 21 | /* This file is included from hwdep.c */ |
| 22 | |
| 23 | #include <linux/compat.h> |
| 24 | |
| 25 | struct sndrv_hwdep_dsp_image32 { |
| 26 | u32 index; |
| 27 | unsigned char name[64]; |
| 28 | u32 image; /* pointer */ |
| 29 | u32 length; |
| 30 | u32 driver_data; |
| 31 | } /* don't set packed attribute here */; |
| 32 | |
| 33 | static int snd_hwdep_dsp_load_compat(snd_hwdep_t *hw, |
| 34 | struct sndrv_hwdep_dsp_image32 __user *src) |
| 35 | { |
| 36 | struct sndrv_hwdep_dsp_image *dst; |
| 37 | compat_caddr_t ptr; |
| 38 | u32 val; |
| 39 | |
| 40 | dst = compat_alloc_user_space(sizeof(*dst)); |
| 41 | |
| 42 | /* index and name */ |
| 43 | if (copy_in_user(dst, src, 4 + 64)) |
| 44 | return -EFAULT; |
| 45 | if (get_user(ptr, &src->image) || |
| 46 | put_user(compat_ptr(ptr), &dst->image)) |
| 47 | return -EFAULT; |
| 48 | if (get_user(val, &src->length) || |
| 49 | put_user(val, &dst->length)) |
| 50 | return -EFAULT; |
| 51 | if (get_user(val, &src->driver_data) || |
| 52 | put_user(val, &dst->driver_data)) |
| 53 | return -EFAULT; |
| 54 | |
| 55 | return snd_hwdep_dsp_load(hw, dst); |
| 56 | } |
| 57 | |
| 58 | enum { |
| 59 | SNDRV_HWDEP_IOCTL_DSP_LOAD32 = _IOW('H', 0x03, struct sndrv_hwdep_dsp_image32) |
| 60 | }; |
| 61 | |
| 62 | static long snd_hwdep_ioctl_compat(struct file * file, unsigned int cmd, unsigned long arg) |
| 63 | { |
| 64 | snd_hwdep_t *hw = file->private_data; |
| 65 | void __user *argp = compat_ptr(arg); |
| 66 | switch (cmd) { |
| 67 | case SNDRV_HWDEP_IOCTL_PVERSION: |
| 68 | case SNDRV_HWDEP_IOCTL_INFO: |
| 69 | case SNDRV_HWDEP_IOCTL_DSP_STATUS: |
| 70 | return snd_hwdep_ioctl(file, cmd, (unsigned long)argp); |
| 71 | case SNDRV_HWDEP_IOCTL_DSP_LOAD32: |
| 72 | return snd_hwdep_dsp_load_compat(hw, argp); |
| 73 | } |
| 74 | if (hw->ops.ioctl_compat) |
| 75 | return hw->ops.ioctl_compat(hw, file, cmd, arg); |
| 76 | return -ENOIOCTLCMD; |
| 77 | } |