libc/kernel/arch-x86/asm/desc_defs.h

/****************************************************************************
 ****************************************************************************
 ***
 ***   This header was automatically generated from a Linux kernel header
 ***   of the same name, to make information necessary for userspace to
 ***   call into the kernel available to libc.  It contains only constants,
 ***   structures, and macros generated from the original header, and thus,
 ***   contains no copyrightable information.
 ***
 ****************************************************************************
 ****************************************************************************/
#ifndef __ARCH_DESC_DEFS_H
#define __ARCH_DESC_DEFS_H

#ifndef __ASSEMBLY__

#include <linux/types.h>

struct desc_struct {
 u16 limit0;
 u16 base0;
 unsigned base1 : 8, type : 4, s : 1, dpl : 2, p : 1;
 unsigned limit : 4, avl : 1, l : 1, d : 1, g : 1, base2 : 8;
} __attribute__((packed));

struct n_desc_struct {
 unsigned int a,b;
};

enum {
 GATE_INTERRUPT = 0xE,
 GATE_TRAP = 0xF,
 GATE_CALL = 0xC,
};

struct gate_struct {
 u16 offset_low;
 u16 segment;
 unsigned ist : 3, zero0 : 5, type : 5, dpl : 2, p : 1;
 u16 offset_middle;
 u32 offset_high;
 u32 zero1;
} __attribute__((packed));

#define PTR_LOW(x) ((unsigned long)(x) & 0xFFFF)
#define PTR_MIDDLE(x) (((unsigned long)(x) >> 16) & 0xFFFF)
#define PTR_HIGH(x) ((unsigned long)(x) >> 32)

enum {
 DESC_TSS = 0x9,
 DESC_LDT = 0x2,
};

struct ldttss_desc {
 u16 limit0;
 u16 base0;
 unsigned base1 : 8, type : 5, dpl : 2, p : 1;
 unsigned limit1 : 4, zero0 : 3, g : 1, base2 : 8;
 u32 base3;
 u32 zero1;
} __attribute__((packed));

struct desc_ptr {
 unsigned short size;
 unsigned long address;
} __attribute__((packed)) ;

#endif

#endif