diff options
Diffstat (limited to 'include/asm-x86_64/ldt.h')
| -rw-r--r-- | include/asm-x86_64/ldt.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/include/asm-x86_64/ldt.h b/include/asm-x86_64/ldt.h new file mode 100644 index 00000000000..9ef647b890d --- /dev/null +++ b/include/asm-x86_64/ldt.h @@ -0,0 +1,36 @@ +/* + * 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 |