/* * This source code is a product of Sun Microsystems, Inc. and is provided * for unrestricted use provided that this legend is included on all tape * media and as a part of the software program in whole or part.  Users * may copy or modify this source code without charge, but are not authorized * to license or distribute it to anyone else except as part of a product or * program developed by the user. * * THIS PROGRAM CONTAINS SOURCE CODE COPYRIGHTED BY SUN MICROSYSTEMS, INC. * SUN MICROSYSTEMS, INC., MAKES NO REPRESENTATIONS ABOUT THE SUITABLITY * OF SUCH SOURCE CODE FOR ANY PURPOSE.  IT IS PROVIDED "AS IS" WITHOUT * EXPRESS OR IMPLIED WARRANTY OF ANY KIND.  SUN MICROSYSTEMS, INC. DISCLAIMS * ALL WARRANTIES WITH REGARD TO SUCH SOURCE CODE, INCLUDING ALL IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  IN * NO EVENT SHALL SUN MICROSYSTEMS, INC. BE LIABLE FOR ANY SPECIAL, INDIRECT, * INCIDENTAL, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING * FROM USE OF SUCH SOURCE CODE, REGARDLESS OF THE THEORY OF LIABILITY. *  * This source code is provided with no support and without any obligation on * the part of Sun Microsystems, Inc. to assist in its use, correction,  * modification or enhancement. * * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY THIS * SOURCE CODE OR ANY PART THEREOF. * * Sun Microsystems, Inc. * 2550 Garcia Avenue * Mountain View, California 94043 *//* @(#)check_stack.c 1.1 69/12/31 SMI *//* * Copyright (c) 1989, 1991 Sun Microsystems, Inc. *//* * Until such time as the kernel can produce accurate core dumps of an * address space (rather than just of a traditional address space), ld.so * "knows" about the implementation of stack frames in SunOS.  In particular, * it "knows" that the environment strings are placed at the "top end" of * the stack frame on process initialization.  This program verifies that * this knowledge remains "true" -- and will cause a build of ld.so to fail * in the event it ever becomes "not true."  (Note: of course, this technique * itself depends upon the build environment matching the execution one -- * not always a guarantee.) */#include <sysexits.h>#include <machine/vmparam.h>extern	char **environ;/*ARGSUSED*/main(argc, argv)	int argc;	char *argv[];{	int user_stack;	int ps = getpagesize();	char c, *cp, **cpp;	ps = getpagesize();	cpp = environ;	do {		cp = *cpp++;	} while (*cpp);	do {		cp++;	} while (*cp);	user_stack = (int)(cp + ps - 1) & ~(ps - 1); 	if (user_stack != USRSTACK) {		printf(	    "Error: USRSTACK calculated as: 0x%x\nUSRSTACK defined as 0x%x\n",		    user_stack, USRSTACK);		exit(EX_DATAERR);		/*NOTREACHED*/	}	exit(0);	/*NOTREACHED*/}