1 /**************************************************************************** 2 **************************************************************************** 3 *** 4 *** This header was automatically generated from a Linux kernel header 5 *** of the same name, to make information necessary for userspace to 6 *** call into the kernel available to libc. It contains only constants, 7 *** structures, and macros generated from the original header, and thus, 8 *** contains no copyrightable information. 9 *** 10 **************************************************************************** 11 ****************************************************************************/ 12 #ifndef __ARCH_DESC_DEFS_H 13 #define __ARCH_DESC_DEFS_H 14 15 #ifndef __ASSEMBLY__ 16 17 #include <linux/types.h> 18 19 struct desc_struct { 20 u16 limit0; 21 u16 base0; 22 unsigned base1 : 8, type : 4, s : 1, dpl : 2, p : 1; 23 unsigned limit : 4, avl : 1, l : 1, d : 1, g : 1, base2 : 8; 24 } __attribute__((packed)); 25 26 struct n_desc_struct { 27 unsigned int a,b; 28 }; 29 30 enum { 31 GATE_INTERRUPT = 0xE, 32 GATE_TRAP = 0xF, 33 GATE_CALL = 0xC, 34 }; 35 36 struct gate_struct { 37 u16 offset_low; 38 u16 segment; 39 unsigned ist : 3, zero0 : 5, type : 5, dpl : 2, p : 1; 40 u16 offset_middle; 41 u32 offset_high; 42 u32 zero1; 43 } __attribute__((packed)); 44 45 #define PTR_LOW(x) ((unsigned long)(x) & 0xFFFF) 46 #define PTR_MIDDLE(x) (((unsigned long)(x) >> 16) & 0xFFFF) 47 #define PTR_HIGH(x) ((unsigned long)(x) >> 32) 48 49 enum { 50 DESC_TSS = 0x9, 51 DESC_LDT = 0x2, 52 }; 53 54 struct ldttss_desc { 55 u16 limit0; 56 u16 base0; 57 unsigned base1 : 8, type : 5, dpl : 2, p : 1; 58 unsigned limit1 : 4, zero0 : 3, g : 1, base2 : 8; 59 u32 base3; 60 u32 zero1; 61 } __attribute__((packed)); 62 63 struct desc_ptr { 64 unsigned short size; 65 unsigned long address; 66 } __attribute__((packed)) ; 67 68 #endif 69 70 #endif 71
