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/* $OpenBSD: i386.c,v 1.3 1996/10/02 02:59:50 tholo Exp $ */
/* $NetBSD: i386.c,v 1.5 1995/04/19 07:16:04 cgd Exp $ */
#ifndef lint
static char rcsid[] = "$OpenBSD: i386.c,v 1.3 1996/10/02 02:59:50 tholo Exp $";
#endif /* not lint */
#include "gprof.h"
#define iscall(pc) ((*pc) == 0xE8)
/*
* gprof -c isn't currently supported...
*/
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
}
}
}
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