doc/doxygen/tss_8h_source.html

 #pragma once


 #include "stdint.h"


 typedef struct tss_entry {

     uint32_t prev_tss;

     uint32_t esp0;

     uint32_t ss0;

     uint32_t esp1;

     uint32_t ss1;

     uint32_t esp2;

     uint32_t ss2;

     uint32_t cr3;

     uint32_t eip;

     uint32_t eflags;

     uint32_t eax;

     uint32_t ecx;

     uint32_t edx;

     uint32_t ebx;

     uint32_t esp;

     uint32_t ebp;

     uint32_t esi;

     uint32_t edi;

     uint32_t es;

     uint32_t cs;

     uint32_t ss;

     uint32_t ds;

     uint32_t fs;

     uint32_t gs;

     uint32_t ldt;

     uint16_t trap;

     uint16_t iomap;

 } tss_entry_t;


 extern void tss_flush(void);


 void tss_init(uint8_t idx, uint32_t ss0);


 void tss_set_stack(uint32_t kss, uint32_t kesp);


tss_flush
void tss_flush(void)
Flushes the Task State Segment.

tss_set_stack
void tss_set_stack(uint32_t kss, uint32_t kesp)
This function is used to set the esp the kernel should be using.
Definition: tss.c:53

tss_init
void tss_init(uint8_t idx, uint32_t ss0)
We don't need tss to assist task switching, but it's required to have one tss for switching back to k...
Definition: tss.c:20

tss_entry_t
struct tss_entry tss_entry_t
Task state segment entry.

stdint.h
Standard integer data-types.

uint16_t
unsigned short uint16_t
Define the unsigned 16-bit integer.
Definition: stdint.h:24

uint32_t
unsigned int uint32_t
Define the unsigned 32-bit integer.
Definition: stdint.h:18

uint8_t
unsigned char uint8_t
Define the unsigned 8-bit integer.
Definition: stdint.h:30

tss_entry
Task state segment entry.
Definition: tss.h:17

tss_entry::esp
uint32_t esp
TODO: Comment.
Definition: tss.h:32

tss_entry::ldt
uint32_t ldt
TODO: Comment.
Definition: tss.h:42

tss_entry::ss2
uint32_t ss2
TODO: Comment.
Definition: tss.h:24

tss_entry::ss
uint32_t ss
TODO: Comment.
Definition: tss.h:38

tss_entry::esp2
uint32_t esp2
TODO: Comment.
Definition: tss.h:23

tss_entry::ss1
uint32_t ss1
TODO: Comment.
Definition: tss.h:22

tss_entry::cs
uint32_t cs
TODO: Comment.
Definition: tss.h:37

tss_entry::eip
uint32_t eip
TODO: Comment.
Definition: tss.h:26

tss_entry::ds
uint32_t ds
TODO: Comment.
Definition: tss.h:39

tss_entry::ecx
uint32_t ecx
TODO: Comment.
Definition: tss.h:29

tss_entry::iomap
uint16_t iomap
TODO: Comment.
Definition: tss.h:44

tss_entry::eflags
uint32_t eflags
TODO: Comment.
Definition: tss.h:27

tss_entry::ebp
uint32_t ebp
TODO: Comment.
Definition: tss.h:33

tss_entry::esp0
uint32_t esp0
The stack pointer to load when we change to kernel mode.
Definition: tss.h:19

tss_entry::ss0
uint32_t ss0
The stack segment to load when we change to kernel mode.
Definition: tss.h:20

tss_entry::edx
uint32_t edx
TODO: Comment.
Definition: tss.h:30

tss_entry::fs
uint32_t fs
TODO: Comment.
Definition: tss.h:40

tss_entry::esp1
uint32_t esp1
everything below here is unusued now.
Definition: tss.h:21

tss_entry::esi
uint32_t esi
TODO: Comment.
Definition: tss.h:34

tss_entry::cr3
uint32_t cr3
TODO: Comment.
Definition: tss.h:25

tss_entry::gs
uint32_t gs
TODO: Comment.
Definition: tss.h:41

tss_entry::trap
uint16_t trap
TODO: Comment.
Definition: tss.h:43

tss_entry::eax
uint32_t eax
TODO: Comment.
Definition: tss.h:28

tss_entry::prev_tss
uint32_t prev_tss
If we used hardware task switching this would form a linked list.
Definition: tss.h:18

tss_entry::edi
uint32_t edi
TODO: Comment.
Definition: tss.h:35

tss_entry::ebx
uint32_t ebx
TODO: Comment.
Definition: tss.h:31

tss_entry::es
uint32_t es
TODO: Comment.
Definition: tss.h:36