os_kernel/userprog/tss.h

#ifndef __USERPROG_TSS_H__
#define __USERPROG_TSS_H__
#include "../thread/thread.h"
#include "../lib/stdint.h"

/**
 * @file tss.h
 * @brief Header file for the Task State Segment (TSS) structure.
 *
 * This file contains the definition of the TSS structure used in the
 * operating system kernel's user program module. The TSS is used to
 * store information about a task, such as stack pointers and segment
 * selectors, which are essential for task switching in protected mode.
 */
typedef struct tss
{
    uint32_t backlink;
    uint32_t *esp0;
    uint32_t ss0;
    uint32_t *esp1;
    uint32_t ss1;
    uint32_t *esp2;
    uint32_t ss2;
    uint32_t cr3;
    uint32_t (*eip)(void);
    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;
    uint32_t trap;
    uint32_t iomap;
} Tss;

/// @brief 更新 tss 中 esp0 字段的值为 pthread 的 0 级线程
/// @param pthread
void update_tss_esp(struct task_struct *pthread);
void tss_init(void);

#endif // !__USERPROG_TSS_H__