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/*
* Copyright (c) 1983, 1993, 2001
* The Regents of the University of California. 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. 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 BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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"
#include "search_list.h"
#include "source.h"
#include "symtab.h"
#include "cg_arcs.h"
#include "corefile.h"
#include "hist.h"
static int i386_iscall (unsigned char *);
void i386_find_call (Sym *, bfd_vma, bfd_vma);
static int
i386_iscall (unsigned char *ip)
{
if (*ip == 0xe8)
return 1;
return 0;
}
void
i386_find_call (Sym *parent, bfd_vma p_lowpc, bfd_vma p_highpc)
{
unsigned char *instructp;
Sym *child;
bfd_vma pc, destpc;
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 (hist_check_address (destpc))
{
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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