1/*
2 * ldt.h
3 *
4 * Definitions of structures used with the modify_ldt system call.
5 */
6#ifndef _LINUX_LDT_H
7#define _LINUX_LDT_H
8
9/* Maximum number of LDT entries supported. */
10#define LDT_ENTRIES	8192
11/* The size of each LDT entry. */
12#define LDT_ENTRY_SIZE	8
13
14#ifndef __ASSEMBLY__
15/* Note on 64bit base and limit is ignored and you cannot set
16   DS/ES/CS not to the default values if you still want to do syscalls. This
17   call is more for 32bit mode therefore. */
18struct modify_ldt_ldt_s {
19	unsigned int  entry_number;
20	unsigned int  base_addr;
21	unsigned int  limit;
22	unsigned int  seg_32bit:1;
23	unsigned int  contents:2;
24	unsigned int  read_exec_only:1;
25	unsigned int  limit_in_pages:1;
26	unsigned int  seg_not_present:1;
27	unsigned int  useable:1;
28	unsigned int  lm:1;
29};
30
31#define MODIFY_LDT_CONTENTS_DATA	0
32#define MODIFY_LDT_CONTENTS_STACK	1
33#define MODIFY_LDT_CONTENTS_CODE	2
34
35#endif /* !__ASSEMBLY__ */
36#endif
37