global.h

《自己动手写操作系统》于渊（著） 一书的源代码

/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
                            global.h
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
                                                    Forrest Yu, 2005
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/

/* EXTERN is defined as extern except in global.c */
#ifdef	GLOBAL_VARIABLES_HERE
#undef	EXTERN
#define	EXTERN
#endif

EXTERN	int		disp_pos;
EXTERN	t_8		gdt_ptr[6];	// 0~15:Limit  16~47:Base
EXTERN	DESCRIPTOR	gdt[GDT_SIZE];
EXTERN	t_8		idt_ptr[6];	// 0~15:Limit  16~47:Base
EXTERN	GATE		idt[IDT_SIZE];

EXTERN	t_32		k_reenter;

EXTERN	TSS		tss;
EXTERN	PROCESS*	p_proc_ready;

extern	PROCESS		proc_table[];
extern	char		task_stack[];