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authorIngo Molnar <mingo@elte.hu>2008-10-27 07:38:02 -0400
committerIngo Molnar <mingo@elte.hu>2008-10-27 07:38:02 -0400
commit5292ae11babca23c3ff82593630d2d7eebc350a9 (patch)
tree30a6c8123b35686098f306ea39398b7621f42054 /arch/x86/include/asm/ldt.h
parentb0f209898f1a177bd503d49215b8c6628797a81c (diff)
parent0173a3265b228da319ceb9c1ec6a5682fd1b2d92 (diff)
Merge commit 'v2.6.28-rc2' into x86/uv
Diffstat (limited to 'arch/x86/include/asm/ldt.h')
-rw-r--r--arch/x86/include/asm/ldt.h40
1 files changed, 40 insertions, 0 deletions
diff --git a/arch/x86/include/asm/ldt.h b/arch/x86/include/asm/ldt.h
new file mode 100644
index 000000000000..46727eb37bfe
--- /dev/null
+++ b/arch/x86/include/asm/ldt.h
@@ -0,0 +1,40 @@
1/*
2 * ldt.h
3 *
4 * Definitions of structures used with the modify_ldt system call.
5 */
6#ifndef _ASM_X86_LDT_H
7#define _ASM_X86_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/*
16 * Note on 64bit base and limit is ignored and you cannot set DS/ES/CS
17 * not to the default values if you still want to do syscalls. This
18 * call is more for 32bit mode therefore.
19 */
20struct user_desc {
21 unsigned int entry_number;
22 unsigned int base_addr;
23 unsigned int limit;
24 unsigned int seg_32bit:1;
25 unsigned int contents:2;
26 unsigned int read_exec_only:1;
27 unsigned int limit_in_pages:1;
28 unsigned int seg_not_present:1;
29 unsigned int useable:1;
30#ifdef __x86_64__
31 unsigned int lm:1;
32#endif
33};
34
35#define MODIFY_LDT_CONTENTS_DATA 0
36#define MODIFY_LDT_CONTENTS_STACK 1
37#define MODIFY_LDT_CONTENTS_CODE 2
38
39#endif /* !__ASSEMBLY__ */
40#endif /* _ASM_X86_LDT_H */