.TITLE	PASS1
	.IDENT	/01/
	.PSECT	CODE,RO
 
;
; VERSION 01
;
; TOM GETZINGER  11-SEP-80
;
; THIS MODULE SCANS ALL "GSD" RECORDS, BUILDING THE PSECT TABLE
;
; LOCAL DATA
;
 
	.PSECT	RWDATA,RW,D
GTSK:	.BLKW	16.
	.PSECT	CODE
 
	.MCALL	GET$S	GTSK$S	WAIT$	WRITE$
PASS1::
	CLR	R2		; INITIALIZE GLOBAL SYMBOL COUNT
	CLR	PASS		; CLEAR PASS FLAG
	MOV	#BITMAP,R0	; CLEAR OUT THE BITMAP
	MOV	#4096.,R1
5$:	CLR	(R0)+
	SOB	R1,5$
	MOV	PSCTBL,R5	; POINT TO START OF PSECT TABLE
 
10$:	GET$S	#FDBIN		; GET THE NEXT RECORD
	BCS	60$		; ERROR
	MOV	F.NRBD(R0),R4	; GET THE RECORD LENGTH
	SUB	#2,R4		; IS IT LESS THAN 2 BYTES LONG?
	BMI	70$		; YES, SO SOMETHING'S WRONG
	MOV	F.NRBD+2(R0),R3	; GET THE RECORD ADDRESS
	MOV	(R3)+,R1	; GET THE RECORD TYPE
	CALL	SELECT		; GO PROCESS IT
	.BYTE	RT.GSD,RT.END
	.WORD	70$		; ILLEGAL TYPE
	.WORD	20$		; GSD
	.WORD	80$		; END OF GSD
	.WORD	10$		; TXT
	.WORD	10$		; RLD
	.WORD	10$		; ISD
	.WORD	70$		; END OF MODULE
 
20$:	ASR	R4		; CALCULATE # OF GSD ENTRIES
	ASR	R4
	ASR	R4
	BEQ	10$		; THERE ARE NONE
30$:	MOVB	G.TYPE(R3),R1	; GET GSD TYPE
	CALL	SELECT		; GO PROCESS IT
	.BYTE	GT.CSC,GT.PSC
	.WORD	50$		; UNWANTED
	.WORD	40$		; .CSECT
	.WORD	50$		; INTERNAL SYMBOL NAME
	.WORD	50$		; .END
	.WORD	35$		; .GLOBL
	.WORD	40$		; .PSECT
 
35$:	BITB	#10,G.FLAG(R3)	; IS THIS A DEFINITION?
	BEQ	50$		; NO, SO IGNORE IT
	INC	R2		; INCREMENT GLOBAL SYMBOL COUNT
	BR	50$
 
40$:	MOV	G.NAME(R3),(R5)+ ; SAVE THE PSECT NAME
	MOV	G.NAME+2(R3),(R5)+
	CLR	(R5)+		; CLEAR CURRENT ADDRESS
	MOV	G.VAL(R3),(R5)+	; SAVE THE MAX LENGTH
	WRITE$	#FDBTMP		; OUTPUT AN EMPTY BITMAP
	BCS	100$		; ERROR
	WAIT$			; WAIT FOR WRITE TO FINISH
	BCS	100$		; ERROR
 
50$:	ADD	#G.LEN,R3	; SKIP TO THE NEXT GSD ENTRY
	SOB	R4,30$		; AND PROCESS IT, IF THERE IS ONE
	BR	10$		; THERE ISN'T, SO PROCESS THE NEXT RECORD
 
60$:	TRAP	INIOER		; INPUT I/O ERROR
	BR	90$
 
70$:	TRAP	OBJFMT		; OBJECT FORMAT ILLEGAL
	BR	90$
 
80$:	MOV	R5,PSCEND	; SAVE PSECT TABLE END ADDRESS
	ASL	R2		; CONVERT GLOBAL SYMBOL COUNT
	ASL	R2		; INTO GLOBAL SYMBOL TABLE LENGTH
	ASL	R2
	ADD	R5,R2		; FIND END OF GLOBAL SYMBOL TABLE
	MOV	R2,GBLEND	; AND SAVE IT
	SUB	PSCTBL,R5	; CALCULATE PSECT TABLE LENGTH
	ASR	R5		; FIND # OF PSECTS IN THE TABLE
	ASR	R5
	ASR	R5
	MOV	R5,NPSCTS	; SAVE PSECT COUNT
	GTSK$S	#GTSK		; GET TASK PARAMETERS
	MOV	GTSK+G.TSTS,R1	; GET TASK END ADDRESS
	SUB	R2,R1		; CALCULATE SIZE OF FREE MEMORY
	BIC	#3,R1		; MAKE SURE IT'S A MULTIPLE OF 4 BYTES
	MOV	#FREEHD+4,R0	; INIT THE FREE MEMORY LISTHEAD
	CLR	-(R0)
	CLR	-(R0)
	CALL	$RLCB		; RELEASE THE BLOCK
	CLC
 
90$:	RETURN
 
100$:	TRAP	TMPERR		; I/O ERROR ON TEMP FILE
 
	.END