ldt_keeper.c File Reference

#include "ldt_keeper.h"
#include <string.h>
#include <stdint.h>
#include <stdlib.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <stdio.h>
#include <unistd.h>
#include "mmap_anon.h"

Classes
struct	user_desc

Macros
#define	LDT_ENTRIES   8192
#define	LDT_ENTRY_SIZE   8
#define	MODIFY_LDT_CONTENTS_DATA   0
#define	MODIFY_LDT_CONTENTS_STACK   1
#define	MODIFY_LDT_CONTENTS_CODE   2
#define	LDT_SEL(idx)   ((idx) << 3 | 1 << 2 | 3)
#define	TEB_SEL_IDX   17

Functions
void	Setup_FS_Segment (void)
ldt_fs_t *	Setup_LDT_Keeper (void)
void	Restore_LDT_Keeper (ldt_fs_t *ldt_fs)

Variables
void *	fs_seg =0

Macro Definition Documentation

LDT_ENTRIES

#define LDT_ENTRIES   8192

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! This file MUST be in main library because LDT must be modified before program creates first thread

• avifile includes this file from C++ code and initializes it at the start of player! it might sound like a hack and it really is - but as aviplay is decoding video with more than just one thread currently it's necessary to do it this way this might change in the future

LDT_ENTRY_SIZE

#define LDT_ENTRY_SIZE   8

LDT_SEL

#define LDT_SEL

(

idx

)

((idx) << 3 | 1 << 2 | 3)

MODIFY_LDT_CONTENTS_CODE

#define MODIFY_LDT_CONTENTS_CODE   2

MODIFY_LDT_CONTENTS_DATA

#define MODIFY_LDT_CONTENTS_DATA   0

MODIFY_LDT_CONTENTS_STACK

#define MODIFY_LDT_CONTENTS_STACK   1

TEB_SEL_IDX

#define TEB_SEL_IDX   17

Function Documentation

Restore_LDT_Keeper()

void Restore_LDT_Keeper

(

ldt_fs_t *

ldt_fs

)

Setup_FS_Segment()

void Setup_FS_Segment

(

void

)

here is a small logical problem with Restore for multithreaded programs - in C++ we use static class for this...

Setup_LDT_Keeper()

ldt_fs_t * Setup_LDT_Keeper

(

void

)

Variable Documentation

fs_seg

void* fs_seg =0