mirror of
https://github.com/torvalds/linux.git
synced 2024-12-29 14:21:47 +00:00
37 lines
909 B
C
37 lines
909 B
C
|
/*
|
||
|
|
* ldt.h
|
||
|
|
*
|
||
|
|
* Definitions of structures used with the modify_ldt system call.
|
||
|
|
*/
|
||
|
|
#ifndef _LINUX_LDT_H
|
||
|
|
#define _LINUX_LDT_H
|
||
|
|
|
||
|
|
/* Maximum number of LDT entries supported. */
|
||
|
|
#define LDT_ENTRIES 8192
|
||
|
|
/* The size of each LDT entry. */
|
||
|
|
#define LDT_ENTRY_SIZE 8
|
||
|
|
|
||
|
|
#ifndef __ASSEMBLY__
|
||
|
|
/* Note on 64bit base and limit is ignored and you cannot set
|
||
|
|
DS/ES/CS not to the default values if you still want to do syscalls. This
|
||
|
|
call is more for 32bit mode therefore. */
|
||
|
|
struct user_desc {
|
||
|
|
unsigned int entry_number;
|
||
|
|
unsigned int base_addr;
|
||
|
|
unsigned int limit;
|
||
|
|
unsigned int seg_32bit:1;
|
||
|
|
unsigned int contents:2;
|
||
|
|
unsigned int read_exec_only:1;
|
||
|
|
unsigned int limit_in_pages:1;
|
||
|
|
unsigned int seg_not_present:1;
|
||
|
|
unsigned int useable:1;
|
||
|
|
unsigned int lm:1;
|
||
|
|
};
|
||
|
|
|
||
|
|
#define MODIFY_LDT_CONTENTS_DATA 0
|
||
|
|
#define MODIFY_LDT_CONTENTS_STACK 1
|
||
|
|
#define MODIFY_LDT_CONTENTS_CODE 2
|
||
|
|
|
||
|
|
#endif /* !__ASSEMBLY__ */
|
||
|
|
#endif
|