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"
#include "intrinsic.h"

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Functions
void	tss_init (void)
struct task_state *	tss_get (void)
void	tss_update (struct thread *next)

Variables
struct task_state *	tss

Function Documentation

tss_get()

struct task_state * tss_get

(

void

)

               {
    ASSERT (tss != NULL);
    return tss;
}

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tss_init()

void tss_init

(

void

)

                {
    /* Our TSS is never used in a call gate or task gate, so only a
     * few fields of it are ever referenced, and those are the only
     * ones we initialize. */
    tss = palloc_get_page (PAL_ASSERT | PAL_ZERO);
    tss_update (thread_current ());
}

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tss_update()

void tss_update

(

struct thread *

next

)

                                 {
    ASSERT (tss != NULL);
    tss->rsp0 = (uint64_t) next + PGSIZE;
}

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Variable Documentation

tss

struct task_state* tss