1 /**
2 * \internal
3 * \file
4 * \brief IPC system call for x86
5 */
6 /*
7 * (c) 2008-2009 Adam Lackorzynski <adam@os.inf.tu-dresden.de>,
8 * Alexander Warg <warg@os.inf.tu-dresden.de>,
9 * Frank Mehnert <fm3@os.inf.tu-dresden.de>,
10 * Jork Löser <jork@os.inf.tu-dresden.de>
11 * economic rights: Technische Universität Dresden (Germany)
12 *
13 * This file is part of TUD:OS and distributed under the terms of the
14 * GNU General Public License 2.
15 * Please see the COPYING-GPL-2 file for details.
16 *
17 * As a special exception, you may use this file as part of a free software
18 * library without restriction. Specifically, if other files instantiate
19 * templates or use macros or inline functions from this file, or you compile
20 * this file and link it with other files to produce an executable, this
21 * file does not by itself cause the resulting executable to be covered by
22 * the GNU General Public License. This exception does not however
23 * invalidate any other reasons why the executable file might be covered by
24 * the GNU General Public License.
25 */
26 #pragma once
27
28 #include <l4/sys/consts.h>
29
30 L4_INLINE l4_msgtag_t
l4_ipc(l4_cap_idx_t dest,l4_utcb_t * u,l4_umword_t flags,l4_umword_t slabel,l4_msgtag_t tag,l4_umword_t * rlabel,l4_timeout_t timeout)31 l4_ipc(l4_cap_idx_t dest, l4_utcb_t *u,
32 l4_umword_t flags,
33 l4_umword_t slabel,
34 l4_msgtag_t tag,
35 l4_umword_t *rlabel,
36 l4_timeout_t timeout) L4_NOTHROW
37 {
38 l4_umword_t dummy, dummy1, dummy2;
39
40 (void)u;
41
42 __asm__ __volatile__
43 (L4_ENTER_KERNEL
44 :
45 "=d" (dummy2),
46 "=S" (slabel),
47 "=c" (dummy1),
48 "=D" (dummy),
49 "=a" (tag.raw)
50 :
51 "S" (slabel),
52 "c" (timeout),
53 "a" (tag.raw),
54 "d" (dest | flags)
55 L4S_PIC_SYSCALL
56 :
57 "memory", "cc" L4S_PIC_CLOBBER
58 );
59
60 if (rlabel)
61 *rlabel = slabel;
62
63 return tag;
64 }
65