L4Re - L4 Runtime Environment
ipc.h
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1 
6 /*
7  * (c) 2008-2009 Adam Lackorzynski <adam@os.inf.tu-dresden.de>,
8  * Alexander Warg <warg@os.inf.tu-dresden.de>
9  * economic rights: Technische Universit├Ąt Dresden (Germany)
10  *
11  * This file is part of TUD:OS and distributed under the terms of the
12  * GNU General Public License 2.
13  * Please see the COPYING-GPL-2 file for details.
14  *
15  * As a special exception, you may use this file as part of a free software
16  * library without restriction. Specifically, if other files instantiate
17  * templates or use macros or inline functions from this file, or you compile
18  * this file and link it with other files to produce an executable, this
19  * file does not by itself cause the resulting executable to be covered by
20  * the GNU General Public License. This exception does not however
21  * invalidate any other reasons why the executable file might be covered by
22  * the GNU General Public License.
23  */
24 #pragma once
25 
26 #include_next <l4/sys/ipc.h>
27 
28 #ifdef __GNUC__
29 
30 #include <l4/sys/compiler.h>
31 #include <l4/sys/syscall_defs.h>
32 
33 L4_INLINE l4_msgtag_t
35  l4_umword_t flags,
36  l4_umword_t slabel,
37  l4_msgtag_t tag,
38  l4_umword_t *rlabel,
39  l4_timeout_t timeout) L4_NOTHROW
40 {
41  register l4_umword_t _dest __asm__("r2") = dest | flags;
42  register l4_umword_t _timeout __asm__("r3") = timeout.raw;
43  register l4_mword_t _tag __asm__("r0") = tag.raw;
44  register l4_umword_t _label __asm__("r4") = slabel;
45  (void)utcb;
46 
47  __asm__ __volatile__
48  ("mov lr, pc \n"
49  "mov pc, %[sc] \n"
50  :
51  "+r" (_dest),
52  "+r" (_timeout),
53  "+r" (_label),
54  "+r" (_tag)
55  :
56  [sc] "i" (L4_SYSCALL_INVOKE)
57  :
58  "cc", "memory", "lr");
59 
60  if (rlabel)
61  *rlabel = _label;
62  tag.raw = _tag;
63 
64  return tag;
65 }
66 
67 #endif //__GNUC__
signed long l4_mword_t
Signed machine word.
Definition: l4int.h:49
Syscall entry definitions.
unsigned long l4_cap_idx_t
L4 Capability selector Type.
Definition: types.h:342
struct l4_utcb_t l4_utcb_t
Opaque type for the UTCB.
Definition: utcb.h:67
Timeout pair.
Definition: __timeout.h:57
L4_ALWAYS_INLINE l4_msgtag_t l4_ipc(l4_cap_idx_t dest, l4_utcb_t *utcb, l4_umword_t flags, l4_umword_t slabel, l4_msgtag_t tag, l4_umword_t *rlabel, l4_timeout_t timeout) L4_NOTHROW
Generic L4 object invocation.
Definition: ipc.h:34
L4 compiler related defines.
unsigned long l4_umword_t
Unsigned machine word.
Definition: l4int.h:52
Message tag data structure.
Definition: types.h:159
#define L4_NOTHROW
Mark a function declaration and definition as never throwing an exception.
Definition: compiler.h:185