L4Re - L4 Runtime Environment
segment.h
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1 #include_next <l4/sys/segment.h>
2 
8 /*
9  * (c) 2008-2009 Adam Lackorzynski <adam@os.inf.tu-dresden.de>
10  * economic rights: Technische Universit├Ąt Dresden (Germany)
11  *
12  * This file is part of TUD:OS and distributed under the terms of the
13  * GNU General Public License 2.
14  * Please see the COPYING-GPL-2 file for details.
15  *
16  * As a special exception, you may use this file as part of a free software
17  * library without restriction. Specifically, if other files instantiate
18  * templates or use macros or inline functions from this file, or you compile
19  * this file and link it with other files to produce an executable, this
20  * file does not by itself cause the resulting executable to be covered by
21  * the GNU General Public License. This exception does not however
22  * invalidate any other reasons why the executable file might be covered by
23  * the GNU General Public License.
24  */
25 #ifndef __L4_SYS__ARCH_X86__L4API_L4F__SEGMENT_H__
26 #define __L4_SYS__ARCH_X86__L4API_L4F__SEGMENT_H__
27 
28 #include <l4/sys/compiler.h>
29 
30 /*****************************************************************************
31  *** Implementation
32  *****************************************************************************/
33 
34 L4_INLINE long
35 fiasco_gdt_set(l4_cap_idx_t thread, void *desc, unsigned int size,
36  unsigned int entry_number_start, l4_utcb_t *utcb)
37 {
38  l4_utcb_mr_u(utcb)->mr[0] = L4_THREAD_X86_GDT_OP;
39  l4_utcb_mr_u(utcb)->mr[1] = entry_number_start;
40  __builtin_memcpy(&l4_utcb_mr_u(utcb)->mr[2], desc, size);
41  return l4_error_u(l4_ipc_call(thread, utcb, l4_msgtag(L4_PROTO_THREAD, 2 + (size >> 2), 0, 0), L4_IPC_NEVER), utcb);
42 }
43 
44 #endif /* ! __L4_SYS__ARCH_X86__L4API_L4F__SEGMENT_H__ */
l4_umword_t mr[L4_UTCB_GENERIC_DATA_SIZE]
Message registers.
Definition: utcb.h:80
l4_msgtag_t l4_ipc_call(l4_cap_idx_t object, l4_utcb_t *utcb, l4_msgtag_t tag, l4_timeout_t timeout) L4_NOTHROW
Object call (usual invocation).
Definition: ipc.h:445
unsigned long l4_cap_idx_t
L4 Capability selector Type.
Definition: types.h:341
long fiasco_gdt_set(l4_cap_idx_t thread, void *desc, unsigned int size, unsigned int entry_number_start, l4_utcb_t *utcb)
Set GDT segment descriptors.
Definition: segment.h:52
struct l4_utcb_t l4_utcb_t
Opaque type for the UTCB.
Definition: utcb.h:67
#define L4_IPC_NEVER
never timeout
Definition: __timeout.h:80
Protocol for messages to a thread object.
Definition: types.h:64
L4 compiler related defines.
l4_msgtag_t l4_msgtag(long label, unsigned words, unsigned items, unsigned flags) L4_NOTHROW
Create a message tag from the specified values.
Definition: types.h:407