PageRenderTime 11ms CodeModel.GetById 10ms app.highlight 0ms RepoModel.GetById 0ms app.codeStats 0ms

/arch/um/sys-x86_64/shared/sysdep/host_ldt.h

https://bitbucket.org/thekraven/iscream_thunderc-2.6.35
C++ Header | 38 lines | 28 code | 5 blank | 5 comment | 17 complexity | d873c2a61cc4e28026aa32ec6c3f0e1a MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.0, AGPL-1.0
 1#ifndef __ASM_HOST_LDT_X86_64_H
 2#define __ASM_HOST_LDT_X86_64_H
 3
 4#include <asm/ldt.h>
 5
 6/*
 7 * macros stolen from include/asm-x86_64/desc.h
 8 */
 9#define LDT_entry_a(info) \
10	((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff))
11
12/* Don't allow setting of the lm bit. It is useless anyways because
13 * 64bit system calls require __USER_CS. */
14#define LDT_entry_b(info) \
15	(((info)->base_addr & 0xff000000) | \
16	(((info)->base_addr & 0x00ff0000) >> 16) | \
17	((info)->limit & 0xf0000) | \
18	(((info)->read_exec_only ^ 1) << 9) | \
19	((info)->contents << 10) | \
20	(((info)->seg_not_present ^ 1) << 15) | \
21	((info)->seg_32bit << 22) | \
22	((info)->limit_in_pages << 23) | \
23	((info)->useable << 20) | \
24	/* ((info)->lm << 21) | */ \
25	0x7000)
26
27#define LDT_empty(info) (\
28	(info)->base_addr	== 0	&& \
29	(info)->limit		== 0	&& \
30	(info)->contents	== 0	&& \
31	(info)->read_exec_only	== 1	&& \
32	(info)->seg_32bit	== 0	&& \
33	(info)->limit_in_pages	== 0	&& \
34	(info)->seg_not_present	== 1	&& \
35	(info)->useable		== 0	&& \
36	(info)->lm              == 0)
37
38#endif