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/*
* Copyright (c) 1983, 1993, 1998
* 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 Sym indirect_child;
void mips_find_call (Sym *, bfd_vma, bfd_vma);
void
mips_find_call (Sym *parent, bfd_vma p_lowpc, bfd_vma p_highpc)
{
bfd_vma pc, dest_pc;
unsigned int op;
int offset;
Sym *child;
static bfd_boolean inited = FALSE;
if (!inited)
{
inited = TRUE;
sym_init (&indirect_child);
indirect_child.name = _("<indirect child>");
indirect_child.cg.prop.fract = 1.0;
indirect_child.cg.cyc.head = &indirect_child;
}
if (!core_text_space)
{
return;
}
if (p_lowpc < s_lowpc)
{
p_lowpc = s_lowpc;
}
if (p_highpc > s_highpc)
{
p_highpc = s_highpc;
}
DBG (CALLDEBUG, printf (_("[find_call] %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 += 4)
{
op = bfd_get_32 (core_bfd, &((char *)core_text_space)[pc - s_lowpc]);
if ((op & 0xfc000000) == 0x0c000000)
{
/* This is a "jal" instruction. Check that the destination
is the address of a function. */
DBG (CALLDEBUG,
printf (_("[find_call] 0x%lx: jal"), (unsigned long) pc));
offset = (op & 0x03ffffff) << 2;
dest_pc = (pc & ~(bfd_vma) 0xfffffff) | offset;
if (dest_pc >= s_lowpc && dest_pc <= s_highpc)
{
child = sym_lookup (&symtab, dest_pc);
DBG (CALLDEBUG,
printf (" 0x%lx\t; name=%s, addr=0x%lx",
(unsigned long) dest_pc, child->name,
(unsigned long) child->addr));
if (child->addr == dest_pc)
{
DBG (CALLDEBUG, printf ("\n"));
/* a hit: */
arc_add (parent, child, (unsigned long) 0);
continue;
}
}
/* Something funny going on. */
DBG (CALLDEBUG, printf ("\tbut it's a botch\n"));
}
else if ((op & 0xfc00f83f) == 0x0000f809)
{
/* This is a "jalr" instruction (indirect call). */
DBG (CALLDEBUG,
printf (_("[find_call] 0x%lx: jalr\n"), (unsigned long) pc));
arc_add (parent, &indirect_child, (unsigned long) 0);
}
}
}
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