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File: [local] / src / usr.bin / gprof / i386.c (download)

Revision 1.10, Tue Oct 27 23:59:38 2009 UTC (14 years, 6 months ago) by deraadt
Branch: MAIN
CVS Tags: OPENBSD_7_5_BASE, OPENBSD_7_5, OPENBSD_7_4_BASE, OPENBSD_7_4, OPENBSD_7_3_BASE, OPENBSD_7_3, OPENBSD_7_2_BASE, OPENBSD_7_2, OPENBSD_7_1_BASE, OPENBSD_7_1, OPENBSD_7_0_BASE, OPENBSD_7_0, OPENBSD_6_9_BASE, OPENBSD_6_9, OPENBSD_6_8_BASE, OPENBSD_6_8, OPENBSD_6_7_BASE, OPENBSD_6_7, OPENBSD_6_6_BASE, OPENBSD_6_6, OPENBSD_6_5_BASE, OPENBSD_6_5, OPENBSD_6_4_BASE, OPENBSD_6_4, OPENBSD_6_3_BASE, OPENBSD_6_3, OPENBSD_6_2_BASE, OPENBSD_6_2, OPENBSD_6_1_BASE, OPENBSD_6_1, OPENBSD_6_0_BASE, OPENBSD_6_0, OPENBSD_5_9_BASE, OPENBSD_5_9, OPENBSD_5_8_BASE, OPENBSD_5_8, OPENBSD_5_7_BASE, OPENBSD_5_7, OPENBSD_5_6_BASE, OPENBSD_5_6, OPENBSD_5_5_BASE, OPENBSD_5_5, OPENBSD_5_4_BASE, OPENBSD_5_4, OPENBSD_5_3_BASE, OPENBSD_5_3, OPENBSD_5_2_BASE, OPENBSD_5_2, OPENBSD_5_1_BASE, OPENBSD_5_1, OPENBSD_5_0_BASE, OPENBSD_5_0, OPENBSD_4_9_BASE, OPENBSD_4_9, OPENBSD_4_8_BASE, OPENBSD_4_8, OPENBSD_4_7_BASE, OPENBSD_4_7, HEAD
Changes since 1.9: +1 -5 lines 

rcsid[] and sccsid[] and copyright[] are essentially unmaintained (and
unmaintainable).  these days, people use source.  these id's do not provide
any benefit, and do hurt the small install media
(the 33,000 line diff is essentially mechanical)
ok with the idea millert, ok dms

/*	$OpenBSD: i386.c,v 1.10 2009/10/27 23:59:38 deraadt Exp $	*/
/*	$NetBSD: i386.c,v 1.5 1995/04/19 07:16:04 cgd Exp $	*/

/*-
 * Copyright (c) 1996 SigmaSoft, Th. Lockert
 * All rights reserved.
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 */

#include "gprof.h"

#define	iscall(off)	((*(u_char *)&textspace[off]) == 0xE8)

void
findcall(nltype *parentp, unsigned long p_lowpc, unsigned long p_highpc)
{
	unsigned long pc;
	long len;
	nltype *childp;
	unsigned long destpc;
	int off;

	if (textspace == 0)
		return;
	if (p_lowpc < s_lowpc)
		p_lowpc = s_lowpc;
	if (p_highpc > s_highpc)
		p_highpc = s_highpc;
#	ifdef DEBUG
		if ( debug & CALLDEBUG ) {
			printf( "[findcall] %s: 0x%x to 0x%x\n" ,
				parentp -> name , p_lowpc , p_highpc );
		}
#	endif /* DEBUG */
	for (pc = p_lowpc; pc < p_highpc; pc += len) {
		off = pc - s_lowpc;
		len = 1;
		if (iscall(off)) {
			destpc = *(unsigned long *)&textspace[off + 1] + off + 5;
#			ifdef DEBUG
				if ( debug & CALLDEBUG ) {
					printf( "[findcall]\t0x%x:calls" , pc - textspace );
					printf( "\tdestpc 0x%x" , destpc );
				}
#			endif /* DEBUG */
			if (destpc >= s_lowpc && destpc <= s_highpc) {
				childp = nllookup(destpc);
#				ifdef DEBUG
					if ( debug & CALLDEBUG ) {
						printf( " childp->name %s" , childp -> name );
						printf( " childp->value 0x%x\n" ,
							childp -> value );
					}
#				endif /* DEBUG */
				if (childp != NULL && childp->value == destpc) {
					addarc(parentp, childp, 0L);
					len += 4;
					continue;
				}
			}
#			ifdef DEBUG
				if ( debug & CALLDEBUG ) {
					printf( "\tbut it's a botch\n" );
				}
#			endif /* DEBUG */
		}
	}
}