/*	$OpenBSD: i386.c,v 1.6 2002/04/20 03:37:40 tholo 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.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission
 *
 * 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.
 */

#ifndef lint
static char rcsid[] = "$OpenBSD: i386.c,v 1.6 2002/04/20 03:37:40 tholo Exp $";
#endif /* not lint */

#include "gprof.h"

#define	iscall(pc)	((*pc) == 0xE8)

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

	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 = textspace + p_lowpc - N_TXTADDR(xbuf) ; pc < textspace + p_highpc - N_TXTADDR(xbuf) ; pc += len) {
		len = 1;
		if (iscall(pc)) {
			destpc = *(unsigned long *)(pc + 1) + (pc - textspace + N_TXTADDR(xbuf)) + 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 */
		}
	}
}