add LCC - a better C-Compiler for WEGA

WEGA/contrib/lcc/lib/libc/u8k/csu/lcrt0.s

@@ -0,0 +1,42 @@
+	.seg
+
+	fp := r13
+	FP := rr12
+	sp := r15
+	SP := rr14
+
+	.psec data
+	.data
+	.=.+4			/* for NULL pointer */
+	.comm	4,	_environ;
+
+	.psec
+	.code
+start::
+	{
+	addb	rh0,#0		// for NULL pointer
+	ld	r7,@SP		/* argc */
+	dec	sp,#8
+	ld	@SP,r7
+	ldl	rr4,SP
+	inc	r5,#10		/* argv */
+/*	ldl	SP(#2),rr4	*/
+	ldl	|_stkseg+2|(sp),rr4
+	ldl	rr2,@rr4	/* addr of fst arg string */
+	dec	r3,#4
+	xor	r0,r0
+	ld	r1,r0
+	ldl	@rr2,rr0
+	inc	r7
+	sla	r7,#2		/* (argc+1)*2 */
+	add	r5,r7
+	ldl	_environ,rr4
+	ldl	SP(#6),rr4
+	ldl	FP,SP
+	call	_main
+	push	@SP,r2
+	call	_exit
+	pop	r0,@SP
+	sc	#1		/* exit */
+	}
+	.extern	_exit