projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| f6a2e7f2 TG |
1 | /* |
| 2 | * ldt.h | |
| 3 | * | |
| 4 | * Definitions of structures used with the modify_ldt system call. | |
| 5 | */ | |
| 77ef50a5 VN |
6 | #ifndef ASM_X86__LDT_H |
| 7 | #define ASM_X86__LDT_H | |
| f6a2e7f2 TG |
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 | */ | |
| 20 | struct 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__ */ | |
| 77ef50a5 | 40 | #endif /* ASM_X86__LDT_H */ |