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/* $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 */
}
}
}
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