1 /* Copyright (C) 2011 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library 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 GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library. If not, see
17 <http://www.gnu.org/licenses/>. */
20 /* TILE-Gx specifies that "unsigned int" is sign extended in the high
21 32 bits. But since the userspace API claims to be "unsigned long",
22 calls into __ioctl() will not be sign extended, but rather pass all
23 64 bits of the argument. Therefore, when we pass the "request"
24 value to the kernel, we must explicitly sign-extend it to match the
25 kernel's internal use of "unsigned int" as the second argument,
26 which we do by casting to "unsigned int". */
32 FEEDBACK_ENTER(__ioctl)
35 moveli TREG_SYSCALL_NR_NAME, __NR_ioctl
41 weak_alias (__ioctl, ioctl)