1991/0625/pc/l.s (diff list | history)

pc/l.s on 1991/0625
1991/0625		#include "mem.h"
1991/0614
1991/0625		GLOBL gdtptr(SB),$6 DATA gdtptr+0(SB)/2, $(6*8) DATA gdtptr+2(SB)/4, $gdt(SB)
1991/0614		/*
1991/0622		* boot processor
1991/0614		*/ TEXT start(SB),$0
1991/0625		CLI /* disable interrupts */ MOVW $NULLSEL,IDTR /* force shutdown on error */ /* point data segment at low memory */ XORL AX,AX MOVW AX,DS /* load gdt address (valid after paging) */ LEAL gdtptr(SB),AX MOVL -KZERO(AX),GDTR
1991/0614		CALL main(SB) /* never returns */
1991/0619		/*
1991/0623		* first 16 ``standard'' traps
1991/0619		*/
1991/0622		TEXT trap0(SB),$0
1991/0623		PUSHL $0 /* put on an error code */
1991/0620		PUSHL $0 JMP alltrap
1991/0622		TEXT trap1(SB),$0
1991/0623		PUSHL $0 /* put on an error code */
1991/0620		PUSHL $1 JMP alltrap
1991/0622		TEXT trap2(SB),$0
1991/0623		PUSHL $0 /* put on an error code */
1991/0620		PUSHL $2 JMP alltrap
1991/0622		TEXT trap3(SB),$0
1991/0623		PUSHL $0 /* put on an error code */
1991/0620		PUSHL $3 JMP alltrap
1991/0622		TEXT trap4(SB),$0
1991/0623		PUSHL $0 /* put on an error code */
1991/0620		PUSHL $4 JMP alltrap
1991/0622		TEXT trap5(SB),$0
1991/0623		PUSHL $0 /* put on an error code */
1991/0620		PUSHL $5 JMP alltrap
1991/0622		TEXT trap6(SB),$0
1991/0623		PUSHL $0 /* put on an error code */
1991/0620		PUSHL $6 JMP alltrap
1991/0622		TEXT trap7(SB),$0
1991/0623		PUSHL $0 /* put on an error code */
1991/0620		PUSHL $7 JMP alltrap
1991/0622		TEXT trap8(SB),$0
1991/0620		PUSHL $8 JMP alltrap
1991/0622		TEXT trap9(SB),$0
1991/0623		PUSHL $0 /* put on an error code */
1991/0620		PUSHL $9 JMP alltrap
1991/0622		TEXT trap10(SB),$0
1991/0623		PUSHL $0 /* put on an error code */
1991/0620		PUSHL $10 JMP alltrap
1991/0622		TEXT trap11(SB),$0
1991/0620		PUSHL $11 JMP alltrap
1991/0622		TEXT trap12(SB),$0
1991/0620		PUSHL $12 JMP alltrap
1991/0622		TEXT trap13(SB),$0
1991/0620		PUSHL $13 JMP alltrap
1991/0622		TEXT trap14(SB),$0
1991/0620		PUSHL $14 JMP alltrap
1991/0622		TEXT trap15(SB),$0
1991/0623		PUSHL $0 /* put on an error code */
1991/0620		PUSHL $15 JMP alltrap
1991/0614
1991/0623		/* * invalid trap */
1991/0622		TEXT invtrap(SB),$0
1991/0619
1991/0623		PUSHL $0 /* put on an error code */
1991/0622		PUSHL $16 JMP alltrap
1991/0619
1991/0623		/* * common trap code */
1991/0622		alltrap:
1991/0623
1991/0625		PUSHL DS
1991/0622		PUSHAL
1991/0625		MOVL $KDSEL, AX MOVW AX, DS
1991/0614		CALL trap(SB)
1991/0622		POPAL
1991/0625		POPL DS ADDL $8,SP /* pop the trap and error codes */
1991/0622		IRETL