44 lines
1.3 KiB
C
44 lines
1.3 KiB
C
#ifndef MINIOS_PROCESS_H
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#define MINIOS_PROCESS_H
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#include "type.h"
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/* pcb中存储用户态进程的寄存器信息 */
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typedef struct s_stackframe { /* proc_ptr points here ↑ Low */
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u32 gs; /* ┓ │ */
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u32 fs; /* ┃ │ */
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u32 es; /* ┃ │ */
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u32 ds; /* ┃ │ */
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u32 edi; /* ┃ │ */
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u32 esi; /* ┣ pushed by save() │ */
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u32 ebp; /* ┃ │ */
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u32 kernel_esp; /* <- 'popad' will ignore it │ */
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u32 ebx; /* ┃ ↑栈从高地址往低地址增长 */
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u32 edx; /* ┃ │ */
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u32 ecx; /* ┃ │ */
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u32 eax; /* ┛ │ */
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u32 retaddr; /* return address for assembly code save() │ */
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u32 eip; /* ┓ │ */
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u32 cs; /* ┃ │ */
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u32 eflags; /* ┣ these are pushed by CPU during interrupt │ */
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u32 esp; /* ┃ │ */
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u32 ss; /* ┛ ┷High */
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}STACK_FRAME;
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/* pcb */
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typedef struct s_proc {
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STACK_FRAME regs; /* process' registers saved in stack frame */
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u32 pid; /* process id passed in from MM */
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char p_name[16]; /* name of the process */
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}PROCESS;
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#ifdef HAPPY_SNAKE
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#define PCB_SIZE 1
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#else
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#define PCB_SIZE 3
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#endif
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/* 指向当前进程pcb的指针 */
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extern PROCESS *p_proc_ready;
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/* pcb表 */
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extern PROCESS proc_table[PCB_SIZE];
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#endif |