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[/] [openrisc/] [trunk/] [gnu-stable/] [binutils-2.20.1/] [gprof/] [i386.c] - Blame information for rev 818

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1 205 julius
/*
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 * Copyright (c) 1983, 1993, 2001
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 *      The Regents of the University of California.  All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. Neither the name of the University nor the names of its contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 */
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#include "gprof.h"
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#include "search_list.h"
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#include "source.h"
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#include "symtab.h"
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#include "cg_arcs.h"
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#include "corefile.h"
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#include "hist.h"
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static int i386_iscall (unsigned char *);
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void i386_find_call (Sym *, bfd_vma, bfd_vma);
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static int
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i386_iscall (unsigned char *ip)
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{
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  if (*ip == 0xe8)
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    return 1;
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  return 0;
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}
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void
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i386_find_call (Sym *parent, bfd_vma p_lowpc, bfd_vma p_highpc)
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{
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  unsigned char *instructp;
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  Sym *child;
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  bfd_vma pc, destpc;
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  DBG (CALLDEBUG, printf ("[findcall] %s: 0x%lx to 0x%lx\n",
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                          parent->name, (unsigned long) p_lowpc,
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                          (unsigned long) p_highpc));
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  for (pc = p_lowpc; pc < p_highpc; ++pc)
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    {
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      instructp = (unsigned char *) core_text_space + pc - core_text_sect->vma;
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      if (i386_iscall (instructp))
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        {
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          DBG (CALLDEBUG,
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               printf ("[findcall]\t0x%lx:call", (unsigned long) pc));
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          /*
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           *  regular pc relative addressing
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           *    check that this is the address of
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           *    a function.
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           */
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          destpc = bfd_get_32 (core_bfd, instructp + 1) + pc + 5;
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          if (hist_check_address (destpc))
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            {
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              child = sym_lookup (&symtab, destpc);
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              if (child && child->addr == destpc)
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                {
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                  /*
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                   *      a hit
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                   */
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                  DBG (CALLDEBUG,
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                       printf ("\tdestpc 0x%lx (%s)\n",
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                               (unsigned long) destpc, child->name));
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                  arc_add (parent, child, (unsigned long) 0);
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                  instructp += 4;       /* call is a 5 byte instruction */
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                  continue;
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                }
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            }
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          /*
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           *  else:
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           *    it looked like a callf, but it:
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           *      a) wasn't actually a callf, or
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           *      b) didn't point to a known function in the symtab, or
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           *      c) something funny is going on.
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           */
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          DBG (CALLDEBUG, printf ("\tbut it's a botch\n"));
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        }
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    }
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}

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