tss.c File Reference

#include "userprog/tss.h"
#include <debug.h>
#include <stddef.h>
#include "userprog/gdt.h"
#include "threads/thread.h"
#include "threads/palloc.h"
#include "threads/vaddr.h"

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Data Structures
struct	tss
	The Task-State Segment (TSS). More...

Functions
void	tss_init (void)
	Initializes the kernel TSS. More...
struct tss *	tss_get (void)
	Returns the kernel TSS. More...
void	tss_update (void)
	Sets the ring 0 stack pointer in the TSS to point to the end of the thread stack. More...

Variables
static struct tss *	tss
	Kernel TSS. More...

Function Documentation

tss_get()

struct tss * tss_get

(

void

)

Returns the kernel TSS.

Definition at line 93 of file tss.c.

References ASSERT, NULL, and tss.

Referenced by gdt_init().

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tss_init()

void tss_init

(

void

)

Initializes the kernel TSS.

Definition at line 80 of file tss.c.

References tss::bitmap, PAL_ASSERT, PAL_ZERO, palloc_get_page(), SEL_KDSEG, tss::ss0, and tss_update().

Referenced by pintos_init().

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tss_update()

void tss_update

(

void

)

Sets the ring 0 stack pointer in the TSS to point to the end of the thread stack.

userprog/tss.h

Definition at line 102 of file tss.c.

References ASSERT, tss::esp0, NULL, PGSIZE, and thread_current().

Referenced by process_activate(), and tss_init().

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Variable Documentation

tss

struct tss* tss

static

Kernel TSS.

Definition at line 76 of file tss.c.

Referenced by tss_get().