1/*	$OpenBSD: i386.c,v 1.10 2009/10/27 23:59:38 deraadt Exp $	*/
2/*	$NetBSD: i386.c,v 1.5 1995/04/19 07:16:04 cgd Exp $	*/
3
4/*-
5 * Copyright (c) 1996 SigmaSoft, Th. Lockert
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include "gprof.h"
30
31#define	iscall(off)	((*(u_char *)&textspace[off]) == 0xE8)
32
33void
34findcall(nltype *parentp, unsigned long p_lowpc, unsigned long p_highpc)
35{
36	unsigned long pc;
37	long len;
38	nltype *childp;
39	unsigned long destpc;
40	int off;
41
42	if (textspace == 0)
43		return;
44	if (p_lowpc < s_lowpc)
45		p_lowpc = s_lowpc;
46	if (p_highpc > s_highpc)
47		p_highpc = s_highpc;
48#	ifdef DEBUG
49		if ( debug & CALLDEBUG ) {
50			printf( "[findcall] %s: 0x%x to 0x%x\n" ,
51				parentp -> name , p_lowpc , p_highpc );
52		}
53#	endif /* DEBUG */
54	for (pc = p_lowpc; pc < p_highpc; pc += len) {
55		off = pc - s_lowpc;
56		len = 1;
57		if (iscall(off)) {
58			destpc = *(unsigned long *)&textspace[off + 1] + off + 5;
59#			ifdef DEBUG
60				if ( debug & CALLDEBUG ) {
61					printf( "[findcall]\t0x%x:calls" , pc - textspace );
62					printf( "\tdestpc 0x%x" , destpc );
63				}
64#			endif /* DEBUG */
65			if (destpc >= s_lowpc && destpc <= s_highpc) {
66				childp = nllookup(destpc);
67#				ifdef DEBUG
68					if ( debug & CALLDEBUG ) {
69						printf( " childp->name %s" , childp -> name );
70						printf( " childp->value 0x%x\n" ,
71							childp -> value );
72					}
73#				endif /* DEBUG */
74				if (childp != NULL && childp->value == destpc) {
75					addarc(parentp, childp, 0L);
76					len += 4;
77					continue;
78				}
79			}
80#			ifdef DEBUG
81				if ( debug & CALLDEBUG ) {
82					printf( "\tbut it's a botch\n" );
83				}
84#			endif /* DEBUG */
85		}
86	}
87}
88