| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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. */ |
| 18 | struct user_desc { |
| 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 |