Second attempt at removing machdep.h and using ALIGN from <sys/param.h>.

The problem with the previous attempt, as noticed by Marcel, was that
stacknxt was being aligned to a pointer boundary instead of an
ALIGNBYTES + 1 boundary, which broke sparc64.

bin/sh/machdep.h

@@ -1,52 +0,0 @@
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- *    must display the following acknowledgement:
- *	This product includes software developed by the University of
- *	California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)machdep.h	8.2 (Berkeley) 5/4/95
- * $FreeBSD$
- */
-
-/*
- * Most machines require the value returned from malloc to be aligned
- * in some way.  The following macro will get this right on many machines.
- */
-
-#ifndef ALIGN
-union align {
-	int i;
-	char *cp;
-};
-
-#define ALIGN(nbytes)	(((nbytes) + sizeof(union align) - 1) & ~(sizeof(union align) - 1))
-#endif

bin/sh/memalloc.c

@@ -42,11 +42,12 @@ static char sccsid[] = "@(#)memalloc.c	8.3 (Berkeley) 5/4/95";
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 
+#include <sys/param.h>
+
 #include "shell.h"
 #include "output.h"
 #include "memalloc.h"
 #include "error.h"
-#include "machdep.h"
 #include "mystring.h"
 #include "expand.h"
 #include <stdlib.h>
@@ -139,8 +140,8 @@ stalloc(int nbytes)
 		sp = ckmalloc(sizeof(struct stack_block) - MINSIZE + 
 		    blocksize);
 		sp->prev = stackp;
-		stacknxt = sp->space;
+		stacknxt = (char *)ALIGN(sp->space);
-		stacknleft = blocksize;
+		stacknleft = blocksize - (stacknxt - sp->space);
 		stackp = sp;
 		INTON;
 	}

bin/sh/nodes.c.pat

@@ -37,6 +37,8 @@
  * $FreeBSD$
  */
 
+#include <sys/param.h>
+
 #include <stdlib.h>
 /*
  * Routine for dealing with parsed shell commands.
@@ -45,7 +47,6 @@
 #include "shell.h"
 #include "nodes.h"
 #include "memalloc.h"
-#include "machdep.h"
 #include "mystring.h"