typedef struct code_desc {
unsigned short limit00;
unsigned short base00;
unsigned char base16;
unsigned char type :5,
#define DESC_CODE_EXEC 0x18
#define DESC_CODE_READ 0x1a
dpl :2,
present :1;
unsigned char limit16 :4,
:2,
opsz :1,
#define DESC_CODE_16B 0
#define DESC_CODE_32B 1
granular:1;
#define DESC_GRAN_BYTE 0
#define DESC_GRAN_PAGE 1
unsigned char base24;
} code_desc_t;
typedef struct data_desc {
unsigned short limit00;
unsigned short base00;
unsigned char base16;
unsigned char type :5,
#define DESC_DATA_RONLY 0x10
#define DESC_DATA_WRITE 0x12
dpl :2,
present :1;
unsigned char limit16 :4,
:2,
stksz :1,
#define DESC_DATA_16B 0
#define DESC_DATA_32B 1
granular:1;
unsigned char base24;
} data_desc_t;
typedef struct ldt_desc {
unsigned short limit00;
unsigned short base00;
unsigned char base16;
unsigned char type :5,
#define DESC_LDT 0x02
:2,
present :1;
unsigned char limit16 :4,
:3,
granular:1;
unsigned char base24;
} ldt_desc_t;
#include <architecture/i386/sel.h>
typedef struct call_gate {
unsigned short offset00;
sel_t seg;
unsigned int argcnt :5,
:3,
type :5,
#define DESC_CALL_GATE 0x0c
dpl :2,
present :1,
offset16:16;
} call_gate_t;
typedef struct trap_gate {
unsigned short offset00;
sel_t seg;
unsigned int :8,
type :5,
#define DESC_TRAP_GATE 0x0f
dpl :2,
present :1,
offset16:16;
} trap_gate_t;
typedef struct intr_gate {
unsigned short offset00;
sel_t seg;
unsigned int :8,
type :5,
#define DESC_INTR_GATE 0x0e
dpl :2,
present :1,
offset16:16;
} intr_gate_t;