[deliverable/binutils-gdb.git] / gprof / i386.c

/*
 * 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"));
	}
    }
}
Commit	Line	Data
	1	/*
	2	* Copyright (c) 1983, 1993, 2001
	3	* The Regents of the University of California. All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
	13	* 3. Neither the name of the University nor the names of its contributors
	14	* may be used to endorse or promote products derived from this software
	15	* without specific prior written permission.
	16	*
	17	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	18	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	19	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	20	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	21	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	22	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	23	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	24	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	25	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	26	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	27	* SUCH DAMAGE.
	28	*/
	29	#include "gprof.h"
	30	#include "search_list.h"
	31	#include "source.h"
	32	#include "symtab.h"
	33	#include "cg_arcs.h"
	34	#include "corefile.h"
	35	#include "hist.h"
	36
	37	static int i386_iscall (unsigned char *);
	38	void i386_find_call (Sym *, bfd_vma, bfd_vma);
	39
	40	static int
	41	i386_iscall (unsigned char *ip)
	42	{
	43	if (*ip == 0xe8)
	44	return 1;
	45	return 0;
	46	}
	47
	48
	49	void
	50	i386_find_call (Sym *parent, bfd_vma p_lowpc, bfd_vma p_highpc)
	51	{
	52	unsigned char *instructp;
	53	Sym *child;
	54	bfd_vma pc, destpc;
	55
	56	DBG (CALLDEBUG, printf ("[findcall] %s: 0x%lx to 0x%lx\n",
	57	parent->name, (unsigned long) p_lowpc,
	58	(unsigned long) p_highpc));
	59
	60	for (pc = p_lowpc; pc < p_highpc; ++pc)
	61	{
	62	instructp = (unsigned char *) core_text_space + pc - core_text_sect->vma;
	63	if (i386_iscall (instructp))
	64	{
	65	DBG (CALLDEBUG,
	66	printf ("[findcall]\t0x%lx:call", (unsigned long) pc));
	67	/*
	68	* regular pc relative addressing
	69	* check that this is the address of
	70	* a function.
	71	*/
	72
	73	destpc = bfd_get_32 (core_bfd, instructp + 1) + pc + 5;
	74	if (hist_check_address (destpc))
	75	{
	76	child = sym_lookup (&symtab, destpc);
	77	if (child && child->addr == destpc)
	78	{
	79	/*
	80	* a hit
	81	*/
	82	DBG (CALLDEBUG,
	83	printf ("\tdestpc 0x%lx (%s)\n",
	84	(unsigned long) destpc, child->name));
	85	arc_add (parent, child, (unsigned long) 0);
	86	instructp += 4; /* call is a 5 byte instruction */
	87	continue;
	88	}
	89	}
	90	/*
	91	* else:
	92	* it looked like a callf, but it:
	93	* a) wasn't actually a callf, or
	94	* b) didn't point to a known function in the symtab, or
	95	* c) something funny is going on.
	96	*/
	97	DBG (CALLDEBUG, printf ("\tbut it's a botch\n"));
	98	}
	99	}
	100	}