diff options
Diffstat (limited to 'arch/parisc/kernel/sys_parisc32.c')
| -rw-r--r-- | arch/parisc/kernel/sys_parisc32.c | 45 |
1 files changed, 13 insertions, 32 deletions
diff --git a/arch/parisc/kernel/sys_parisc32.c b/arch/parisc/kernel/sys_parisc32.c index 0115eac76c39..eca69bb8ef5f 100644 --- a/arch/parisc/kernel/sys_parisc32.c +++ b/arch/parisc/kernel/sys_parisc32.c @@ -60,42 +60,23 @@ asmlinkage long sys32_unimplemented(int r26, int r25, int r24, int r23, return -ENOSYS; } -asmlinkage int sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset, s32 count) +/* Note: it is necessary to treat out_fd and in_fd as unsigned ints, with the + * corresponding cast to a signed int to insure that the proper conversion + * (sign extension) between the register representation of a signed int (msr in + * 32-bit mode) and the register representation of a signed int (msr in 64-bit + * mode) is performed. + */ +asmlinkage long sys32_sendfile(u32 out_fd, u32 in_fd, + compat_off_t __user *offset, compat_size_t count) { - mm_segment_t old_fs = get_fs(); - int ret; - off_t of; - - if (offset && get_user(of, offset)) - return -EFAULT; - - set_fs(KERNEL_DS); - ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL, count); - set_fs(old_fs); - - if (offset && put_user(of, offset)) - return -EFAULT; - - return ret; + return compat_sys_sendfile((int)out_fd, (int)in_fd, offset, count); } -asmlinkage int sys32_sendfile64(int out_fd, int in_fd, compat_loff_t __user *offset, s32 count) +asmlinkage long sys32_sendfile64(u32 out_fd, u32 in_fd, + compat_loff_t __user *offset, compat_size_t count) { - mm_segment_t old_fs = get_fs(); - int ret; - loff_t lof; - - if (offset && get_user(lof, offset)) - return -EFAULT; - - set_fs(KERNEL_DS); - ret = sys_sendfile64(out_fd, in_fd, offset ? (loff_t __user *)&lof : NULL, count); - set_fs(old_fs); - - if (offset && put_user(lof, offset)) - return -EFAULT; - - return ret; + return sys_sendfile64((int)out_fd, (int)in_fd, + (loff_t __user *)offset, count); } |