crt0.l

移植Nuclues_RTC到coldfire5307在diab下编译通过

                                  1 	;
                                  2 	;	C program assembly startup for an embedded environment.
                                  3 	;	-------------------------------------------------------
                                  4 	;
                                  5 	;	Written by Tomas Evensen 1993-04-17.
                                  6 	;	Copyright 1993 Diab Data AB.
                                  7 	;
                                  8 	;       Modified by Dave McCartney May 1996
                                  9 	;
                                 10 		PSECT
                                 11 		XDEF	START
                                 12 		XREF	_clean1
                                 13 		XREF	_size
                                 14 	
                                 15 	START:
                                 16 	;
                                 17 	; insert/modify code here to initialize (if necessary):
                                 18 	; - sp (stack pointer)
                                 19 	; - a5 (data pointer)
                                 20 	; - the cache
                                 21 	; - exception vectors
                                 22 	;
                                 23 	; initialize sp to value from link editor command file
                                 24 	;	move.l	#___SP_INIT,a7
  00000000 00  2e7c 0000 0000    25 		move.l	#STKTOP,a7
                                 26 	
                                 27 	; initialize a5 to sdata (provided by linker)
  00000006 00  2a7c 0000 0000    28 		move.l	#sdata,a5
                                 29 	;
                                 30 	; initialise the bss section to zero
                                 31 	
  0000000c 00  227c 0000 0000    32 		MOVE.L	#_clean1,A1
  00000012 00  223c 0000 0000    33 		MOVE.L	#_size,D1
  00000018 00  e489              34 		LSR.L	#2,D1
  0000001a 00  4299              35 	LOOP	CLR.L	(A1)+
  0000001c 00  5381              36 		SUBQ.L	#1,D1
  0000001e 00  66fa              37 		BNE	LOOP
                                 38 	 
                                 39 	
                                 40 		
  00000020 00  4eb9 0000 0000    41 		jsr	_main	; go to main code
                                 42 	
                                 43 	
                                 44 		section	.init,2,C
                                 45 		XDEF	___init
                                 46 	___init:
                                 47 	
                                 48 		section	.fini,2,C
                                 49 	; Return from __init
  00000000 02  4e75              50 		rts
                                 51 		XDEF	___fini
                                 52 	___fini:
                                 53 	
                                 54 		section	.eini,2,C
                                 55 	; Return from ___fini
                                 56 	
                                 57 	
                                 58 	
  00000000 03  4e75              59 		rts		; this return will be used instead of illegal
                                 60 	                        ; if a benchmark driver routine is used