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