131 lines
3.1 KiB
C
131 lines
3.1 KiB
C
|
#pragma once
|
|||
|
|
|
|||
|
|
#include <common/wait_queue.h>
|
|||
|
|
|
|||
|
|
// 进程最大可拥有的文件描述符数量
|
|||
|
|
#define PROC_MAX_FD_NUM 16
|
|||
|
|
|
|||
|
|
// 进程的内核栈大小 32K
|
|||
|
|
#define STACK_SIZE 32768
|
|||
|
|
|
|||
|
|
// 进程的运行状态
|
|||
|
|
// 正在运行
|
|||
|
|
#define PROC_RUNNING (1 << 0)
|
|||
|
|
// 可被中断
|
|||
|
|
#define PROC_INTERRUPTIBLE (1 << 1)
|
|||
|
|
// 不可被中断
|
|||
|
|
#define PROC_UNINTERRUPTIBLE (1 << 2)
|
|||
|
|
// 挂起
|
|||
|
|
#define PROC_ZOMBIE (1 << 3)
|
|||
|
|
// 已停止
|
|||
|
|
#define PROC_STOPPED (1 << 4)
|
|||
|
|
|
|||
|
|
// 内核代码段基地址
|
|||
|
|
#define KERNEL_CS (0x08)
|
|||
|
|
// 内核数据段基地址
|
|||
|
|
#define KERNEL_DS (0x10)
|
|||
|
|
// 用户代码段基地址
|
|||
|
|
#define USER_CS (0x28)
|
|||
|
|
// 用户数据段基地址
|
|||
|
|
#define USER_DS (0x30)
|
|||
|
|
|
|||
|
|
// 进程初始化时的数据拷贝标志位
|
|||
|
|
#define CLONE_FS (1 << 0) // 在进程间共享打开的文件
|
|||
|
|
#define CLONE_SIGNAL (1 << 1)
|
|||
|
|
#define CLONE_VM (1 << 2) // 在进程间共享虚拟内存空间
|
|||
|
|
|
|||
|
|
struct thread_struct
|
|||
|
|
{
|
|||
|
|
// 内核层栈基指针
|
|||
|
|
ul rbp; // in tss rsp0
|
|||
|
|
// 内核层代码指针
|
|||
|
|
ul rip;
|
|||
|
|
// 内核层栈指针
|
|||
|
|
ul rsp;
|
|||
|
|
|
|||
|
|
ul fs, gs;
|
|||
|
|
|
|||
|
|
ul cr2;
|
|||
|
|
// 异常号
|
|||
|
|
ul trap_num;
|
|||
|
|
// 错误码
|
|||
|
|
ul err_code;
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
// ========= pcb->flags =========
|
|||
|
|
// 进程标志位
|
|||
|
|
#define PF_KTHREAD (1UL << 0) // 内核线程
|
|||
|
|
#define PF_NEED_SCHED (1UL << 1) // 进程需要被调度
|
|||
|
|
#define PF_VFORK (1UL << 2) // 标志进程是否由于vfork而存在资源共享
|
|||
|
|
#define PF_KFORK (1UL << 3) // 标志在内核态下调用fork（临时标记，do_fork()结束后会将其复位）
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* @brief 进程控制块
|
|||
|
|
*
|
|||
|
|
*/
|
|||
|
|
struct process_control_block
|
|||
|
|
{
|
|||
|
|
// 进程的状态
|
|||
|
|
volatile long state;
|
|||
|
|
// 进程标志：进程、线程、内核线程
|
|||
|
|
unsigned long flags;
|
|||
|
|
int64_t preempt_count; // 持有的自旋锁的数量
|
|||
|
|
long signal;
|
|||
|
|
long cpu_id; // 当前进程在哪个CPU核心上运行
|
|||
|
|
// 内存空间分布结构体， 记录内存页表和程序段信息
|
|||
|
|
struct mm_struct *mm;
|
|||
|
|
|
|||
|
|
// 进程切换时保存的状态信息
|
|||
|
|
struct thread_struct *thread;
|
|||
|
|
|
|||
|
|
// 连接各个pcb的双向链表
|
|||
|
|
struct List list;
|
|||
|
|
|
|||
|
|
// 地址空间范围
|
|||
|
|
// 用户空间： 0x0000 0000 0000 0000 ~ 0x0000 7fff ffff ffff
|
|||
|
|
// 内核空间： 0xffff 8000 0000 0000 ~ 0xffff ffff ffff ffff
|
|||
|
|
uint64_t addr_limit;
|
|||
|
|
|
|||
|
|
long pid;
|
|||
|
|
long priority; // 优先级
|
|||
|
|
int64_t virtual_runtime; // 虚拟运行时间
|
|||
|
|
|
|||
|
|
// 进程拥有的文件描述符的指针数组
|
|||
|
|
// todo: 改用动态指针数组
|
|||
|
|
struct vfs_file_t *fds[PROC_MAX_FD_NUM];
|
|||
|
|
|
|||
|
|
// 链表中的下一个pcb
|
|||
|
|
struct process_control_block *next_pcb;
|
|||
|
|
// 父进程的pcb
|
|||
|
|
struct process_control_block *parent_pcb;
|
|||
|
|
|
|||
|
|
int32_t exit_code; // 进程退出时的返回码
|
|||
|
|
wait_queue_node_t wait_child_proc_exit; // 子进程退出等待队列
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
// 将进程的pcb和内核栈融合到一起,8字节对齐
|
|||
|
|
union proc_union
|
|||
|
|
{
|
|||
|
|
struct process_control_block pcb;
|
|||
|
|
ul stack[STACK_SIZE / sizeof(ul)];
|
|||
|
|
} __attribute__((aligned(8)));
|
|||
|
|
|
|||
|
|
struct tss_struct
|
|||
|
|
{
|
|||
|
|
unsigned int reserved0;
|
|||
|
|
ul rsp0;
|
|||
|
|
ul rsp1;
|
|||
|
|
ul rsp2;
|
|||
|
|
ul reserved1;
|
|||
|
|
ul ist1;
|
|||
|
|
ul ist2;
|
|||
|
|
ul ist3;
|
|||
|
|
ul ist4;
|
|||
|
|
ul ist5;
|
|||
|
|
ul ist6;
|
|||
|
|
ul ist7;
|
|||
|
|
ul reserved2;
|
|||
|
|
unsigned short reserved3;
|
|||
|
|
// io位图基地址
|
|||
|
|
unsigned short io_map_base_addr;
|
|||
|
|
} __attribute__((packed)); // 使用packed表明是紧凑结构，编译器不会对成员变量进行字节对齐。
|