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 snd_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(struct snd_hwdep *hw, 34 struct snd_hwdep_dsp_image32 __user *src) 35 { 36 struct snd_hwdep_dsp_image __user *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 snd_hwdep_dsp_image32) 60 }; 61 62 static long snd_hwdep_ioctl_compat(struct file * file, unsigned int cmd, 63 unsigned long arg) 64 { 65 struct snd_hwdep *hw = file->private_data; 66 void __user *argp = compat_ptr(arg); 67 switch (cmd) { 68 case SNDRV_HWDEP_IOCTL_PVERSION: 69 case SNDRV_HWDEP_IOCTL_INFO: 70 case SNDRV_HWDEP_IOCTL_DSP_STATUS: 71 return snd_hwdep_ioctl(file, cmd, (unsigned long)argp); 72 case SNDRV_HWDEP_IOCTL_DSP_LOAD32: 73 return snd_hwdep_dsp_load_compat(hw, argp); 74 } 75 if (hw->ops.ioctl_compat) 76 return hw->ops.ioctl_compat(hw, file, cmd, arg); 77 return -ENOIOCTLCMD; 78 } 79