hwdep_compat.c 2.3 KB

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  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. /* This file is included from hwdep.c */
  21. #include <linux/compat.h>
  22. struct snd_hwdep_dsp_image32 {
  23. u32 index;
  24. unsigned char name[64];
  25. u32 image; /* pointer */
  26. u32 length;
  27. u32 driver_data;
  28. } /* don't set packed attribute here */;
  29. static int snd_hwdep_dsp_load_compat(struct snd_hwdep *hw,
  30. struct snd_hwdep_dsp_image32 __user *src)
  31. {
  32. struct snd_hwdep_dsp_image __user *dst;
  33. compat_caddr_t ptr;
  34. u32 val;
  35. dst = compat_alloc_user_space(sizeof(*dst));
  36. /* index and name */
  37. if (copy_in_user(dst, src, 4 + 64))
  38. return -EFAULT;
  39. if (get_user(ptr, &src->image) ||
  40. put_user(compat_ptr(ptr), &dst->image))
  41. return -EFAULT;
  42. if (get_user(val, &src->length) ||
  43. put_user(val, &dst->length))
  44. return -EFAULT;
  45. if (get_user(val, &src->driver_data) ||
  46. put_user(val, &dst->driver_data))
  47. return -EFAULT;
  48. return snd_hwdep_dsp_load(hw, dst);
  49. }
  50. enum {
  51. SNDRV_HWDEP_IOCTL_DSP_LOAD32 = _IOW('H', 0x03, struct snd_hwdep_dsp_image32)
  52. };
  53. static long snd_hwdep_ioctl_compat(struct file * file, unsigned int cmd,
  54. unsigned long arg)
  55. {
  56. struct snd_hwdep *hw = file->private_data;
  57. void __user *argp = compat_ptr(arg);
  58. switch (cmd) {
  59. case SNDRV_HWDEP_IOCTL_PVERSION:
  60. case SNDRV_HWDEP_IOCTL_INFO:
  61. case SNDRV_HWDEP_IOCTL_DSP_STATUS:
  62. return snd_hwdep_ioctl(file, cmd, (unsigned long)argp);
  63. case SNDRV_HWDEP_IOCTL_DSP_LOAD32:
  64. return snd_hwdep_dsp_load_compat(hw, argp);
  65. }
  66. if (hw->ops.ioctl_compat)
  67. return hw->ops.ioctl_compat(hw, file, cmd, arg);
  68. return -ENOIOCTLCMD;
  69. }