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/*
* Copyright (c) 1983, 2001 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that: (1) source distributions retain this entire copyright
* notice and comment, and (2) distributions including binaries display
* the following acknowledgement: ``This product includes software
* developed by the University of California, Berkeley and its contributors''
* in the documentation or other materials provided with the distribution
* and in all advertising materials mentioning features or use of this
* software. Neither the name of the University nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#include "gprof.h"
#include "search_list.h"
#include "source.h"
#include "symtab.h"
#include "cg_arcs.h"
#include "corefile.h"
#include "hist.h"
static int i386_iscall PARAMS ((unsigned char *));
void i386_find_call PARAMS ((Sym *, bfd_vma, bfd_vma));
static int
i386_iscall (ip)
unsigned char *ip;
{
if (*ip == 0xe8)
return 1;
return 0;
}
void
i386_find_call (parent, p_lowpc, p_highpc)
Sym *parent;
bfd_vma p_lowpc;
bfd_vma p_highpc;
{
unsigned char *instructp;
Sym *child;
bfd_vma pc, destpc;
if (core_text_space == 0)
{
return;
}
if (p_lowpc < s_lowpc)
{
p_lowpc = s_lowpc;
}
if (p_highpc > s_highpc)
{
p_highpc = s_highpc;
}
DBG (CALLDEBUG, printf ("[findcall] %s: 0x%lx to 0x%lx\n",
parent->name, (unsigned long) p_lowpc,
(unsigned long) p_highpc));
for (pc = p_lowpc; pc < p_highpc; ++pc)
{
instructp = (unsigned char *) core_text_space + pc - core_text_sect->vma;
if (i386_iscall (instructp))
{
DBG (CALLDEBUG,
printf ("[findcall]\t0x%lx:call", (unsigned long) pc));
/*
* regular pc relative addressing
* check that this is the address of
* a function.
*/
destpc = bfd_get_32 (core_bfd, instructp + 1) + pc + 5;
if (destpc >= s_lowpc && destpc <= s_highpc)
{
child = sym_lookup (&symtab, destpc);
if (child && child->addr == destpc)
{
/*
* a hit
*/
DBG (CALLDEBUG,
printf ("\tdestpc 0x%lx (%s)\n",
(unsigned long) destpc, child->name));
arc_add (parent, child, (unsigned long) 0);
instructp += 4; /* call is a 5 byte instruction */
continue;
}
}
/*
* else:
* it looked like a callf, but it:
* a) wasn't actually a callf, or
* b) didn't point to a known function in the symtab, or
* c) something funny is going on.
*/
DBG (CALLDEBUG, printf ("\tbut it's a botch\n"));
}
}
}
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