L4Re Operating System Framework
Interface and Usage Documentation
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segment.h
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1#include_next <l4/sys/segment.h>
2
8/*
9 * (c) 2011 Adam Lackorzynski <adam@os.inf.tu-dresden.de>
10 * economic rights: Technische Universität 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_AMD64__L4API_L4F__SEGMENT_H__
26#define __L4_SYS__ARCH_AMD64__L4API_L4F__SEGMENT_H__
27
28#include <l4/sys/compiler.h>
29
30/*****************************************************************************
31 *** Implementation
32 *****************************************************************************/
33
34L4_INLINE long
36{
38 l4_utcb_mr_u(utcb)->mr[1] = base;
39 return l4_error_u(l4_ipc_call(thread, utcb, l4_msgtag(L4_PROTO_THREAD, 2, 0, 0), L4_IPC_NEVER), utcb);
40}
41
42L4_INLINE long
44 l4_umword_t base, l4_utcb_t *utcb)
45{
46 l4_utcb_mr_u(utcb)->mr[0] = L4_THREAD_AMD64_SET_SEGMENT_BASE_OP | ((l4_umword_t)segr << 16);
47 l4_utcb_mr_u(utcb)->mr[1] = base;
48 return l4_error_u(l4_ipc_call(thread, utcb, l4_msgtag(L4_PROTO_THREAD, 2, 0, 0), L4_IPC_NEVER), utcb);
49}
50
51L4_INLINE long
52fiasco_gdt_set(l4_cap_idx_t thread, void *desc, unsigned int size,
53 unsigned int entry_number_start, l4_utcb_t *utcb)
54{
55 l4_utcb_mr_u(utcb)->mr[0] = L4_THREAD_X86_GDT_OP;
56 l4_utcb_mr_u(utcb)->mr[1] = entry_number_start;
57 __builtin_memcpy(&l4_utcb_mr_u(utcb)->mr[2], desc, size);
58 return l4_error_u(l4_ipc_call(thread, utcb, l4_msgtag(L4_PROTO_THREAD, 2 + (size / 8), 0, 0), L4_IPC_NEVER), utcb);
59}
60
61#endif /* ! __L4_SYS__ARCH_X86__L4API_L4F__SEGMENT_H__ */
L4_sys_segment
Constants for identifying segments.
Definition segment.h:118
@ L4_AMD64_SEGMENT_FS
Constant identifying the FS segment.
Definition segment.h:120
long fiasco_amd64_set_segment_base(l4_cap_idx_t thread, enum L4_sys_segment segr, l4_umword_t base, l4_utcb_t *utcb)
Set the base address for a segment.
Definition segment.h:43
long fiasco_amd64_set_fs(l4_cap_idx_t thread, l4_umword_t base, l4_utcb_t *utcb)
Set the base address for the FS segment.
Definition segment.h:35
L4 compiler related defines.
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
unsigned long l4_umword_t
Unsigned machine word.
Definition l4int.h:51
unsigned long l4_cap_idx_t
Capability selector type.
Definition types.h:359
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:576
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:428
@ L4_PROTO_THREAD
Protocol for messages to a thread object.
Definition types.h:64
@ L4_THREAD_AMD64_SET_SEGMENT_BASE_OP
Set segment base.
Definition thread.h:706
@ L4_THREAD_X86_GDT_OP
Gdt.
Definition thread.h:704
#define L4_IPC_NEVER
never timeout
Definition __timeout.h:84
struct l4_utcb_t l4_utcb_t
Opaque type for the UTCB.
Definition utcb.h:67
#define L4_INLINE
L4 Inline function attribute.
Definition compiler.h:62
l4_umword_t mr[L4_UTCB_GENERIC_DATA_SIZE]
Message registers.
Definition utcb.h:80