mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-21 08:19:28 +00:00
![Avi Kivity](/assets/img/avatar_default.png)
Code that wants to use struct desc_struct cannot do so on i386 because desc.h contains other code that will only compile on x86_64. So extract the structure definitions into a asm-x86_64/desc_defs.h. Signed-off-by: Avi Kivity <avi@qumranet.com> Signed-off-by: Andi Kleen <ak@suse.de> include/asm-x86_64/desc.h | 53 ------------------------------- include/asm-x86_64/desc_defs.h | 69 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 70 insertions(+), 52 deletions(-)
69 lines
1.3 KiB
C
69 lines
1.3 KiB
C
/* Written 2000 by Andi Kleen */
|
|
#ifndef __ARCH_DESC_DEFS_H
|
|
#define __ARCH_DESC_DEFS_H
|
|
|
|
/*
|
|
* Segment descriptor structure definitions, usable from both x86_64 and i386
|
|
* archs.
|
|
*/
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#include <linux/types.h>
|
|
|
|
// 8 byte segment descriptor
|
|
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,
|
|
};
|
|
|
|
// 16byte gate
|
|
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,
|
|
};
|
|
|
|
// LDT or TSS descriptor in the GDT. 16 bytes.
|
|
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 /* !__ASSEMBLY__ */
|
|
|
|
#endif
|