[deliverable/binutils-gdb.git] / gprof / vax.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"

    /*
     *        opcode of the `calls' instruction
     */
#define	CALLS	0xfb

    /*
     *        register for pc relative addressing
     */
#define	PC	0xf

enum opermodes
  {
    literal, indexed, reg, regdef, autodec, autoinc, autoincdef,
    bytedisp, bytedispdef, worddisp, worddispdef, longdisp, longdispdef,
    immediate, absolute, byterel, bytereldef, wordrel, wordreldef,
    longrel, longreldef
  };
typedef enum opermodes operandenum;

/* *INDENT-OFF* */
/* Here to document only.  We can't use this when cross compiling as
   the bitfield layout might not be the same as native.

   struct modebyte
     {
       unsigned int regfield:4;
       unsigned int modefield:4;
     };
*/
/* *INDENT-ON* */

/*
 * A symbol to be the child of indirect calls:
 */
static Sym indirectchild;

static operandenum vax_operandmode (unsigned char *);
static char *vax_operandname (operandenum);
static long vax_operandlength (unsigned char *);
static bfd_signed_vma vax_offset (unsigned char *);
void vax_find_call (Sym *, bfd_vma, bfd_vma);

static operandenum
vax_operandmode (unsigned char *modep)
{
  int usesreg = *modep & 0xf;

  switch ((*modep >> 4) & 0xf)
    {
    case 0:
    case 1:
    case 2:
    case 3:
      return literal;
    case 4:
      return indexed;
    case 5:
      return reg;
    case 6:
      return regdef;
    case 7:
      return autodec;
    case 8:
      return usesreg != PC ? autoinc : immediate;
    case 9:
      return usesreg != PC ? autoincdef : absolute;
    case 10:
      return usesreg != PC ? bytedisp : byterel;
    case 11:
      return usesreg != PC ? bytedispdef : bytereldef;
    case 12:
      return usesreg != PC ? worddisp : wordrel;
    case 13:
      return usesreg != PC ? worddispdef : wordreldef;
    case 14:
      return usesreg != PC ? longdisp : longrel;
    case 15:
      return usesreg != PC ? longdispdef : longreldef;
    }
  /* NOTREACHED */
  abort ();
}

static char *
vax_operandname (operandenum mode)
{

  switch (mode)
    {
    case literal:
      return "literal";
    case indexed:
      return "indexed";
    case reg:
      return "register";
    case regdef:
      return "register deferred";
    case autodec:
      return "autodecrement";
    case autoinc:
      return "autoincrement";
    case autoincdef:
      return "autoincrement deferred";
    case bytedisp:
      return "byte displacement";
    case bytedispdef:
      return "byte displacement deferred";
    case byterel:
      return "byte relative";
    case bytereldef:
      return "byte relative deferred";
    case worddisp:
      return "word displacement";
    case worddispdef:
      return "word displacement deferred";
    case wordrel:
      return "word relative";
    case wordreldef:
      return "word relative deferred";
    case immediate:
      return "immediate";
    case absolute:
      return "absolute";
    case longdisp:
      return "long displacement";
    case longdispdef:
      return "long displacement deferred";
    case longrel:
      return "long relative";
    case longreldef:
      return "long relative deferred";
    }
  /* NOTREACHED */
  abort ();
}

static long
vax_operandlength (unsigned char *modep)
{

  switch (vax_operandmode (modep))
    {
    case literal:
    case reg:
    case regdef:
    case autodec:
    case autoinc:
    case autoincdef:
      return 1;
    case bytedisp:
    case bytedispdef:
    case byterel:
    case bytereldef:
      return 2;
    case worddisp:
    case worddispdef:
    case wordrel:
    case wordreldef:
      return 3;
    case immediate:
    case absolute:
    case longdisp:
    case longdispdef:
    case longrel:
    case longreldef:
      return 5;
    case indexed:
      return 1 + vax_operandlength (modep + 1);
    }
  /* NOTREACHED */
  abort ();
}

static bfd_signed_vma
vax_offset (unsigned char *modep)
{
  operandenum mode = vax_operandmode (modep);

  ++modep;				/* skip over the mode */
  switch (mode)
    {
    default:
      fprintf (stderr, "[reladdr] not relative address\n");
      return 0;
    case byterel:
      return 1 + bfd_get_signed_8 (core_bfd, modep);
    case wordrel:
      return 2 + bfd_get_signed_16 (core_bfd, modep);
    case longrel:
      return 4 + bfd_get_signed_32 (core_bfd, modep);
    }
}


void
vax_find_call (Sym *parent, bfd_vma p_lowpc, bfd_vma p_highpc)
{
  unsigned char *instructp;
  long length;
  Sym *child;
  operandenum mode;
  operandenum firstmode;
  bfd_vma pc, destpc;
  static bfd_boolean inited = FALSE;

  if (!inited)
    {
      inited = TRUE;
      sym_init (&indirectchild);
      indirectchild.cg.prop.fract = 1.0;
      indirectchild.cg.cyc.head = &indirectchild;
    }

  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 += length)
    {
      length = 1;
      instructp = ((unsigned char *) core_text_space
		   + pc - core_text_sect->vma);
      if ((*instructp & 0xff) == CALLS)
	{
	  /*
	   *    maybe a calls, better check it out.
	   *      skip the count of the number of arguments.
	   */
	  DBG (CALLDEBUG,
	       printf ("[findcall]\t0x%lx:calls", (unsigned long) pc));
	  firstmode = vax_operandmode (instructp + length);
	  switch (firstmode)
	    {
	    case literal:
	    case immediate:
	      break;
	    default:
	      goto botched;
	    }
	  length += vax_operandlength (instructp + length);
	  mode = vax_operandmode (instructp + length);
	  DBG (CALLDEBUG,
	       printf ("\tfirst operand is %s", vax_operandname (firstmode));
	       printf ("\tsecond operand is %s\n", vax_operandname (mode)));
	  switch (mode)
	    {
	    case regdef:
	    case bytedispdef:
	    case worddispdef:
	    case longdispdef:
	    case bytereldef:
	    case wordreldef:
	    case longreldef:
	      /*
	       *    indirect call: call through pointer
	       *      either  *d(r)   as a parameter or local
	       *              (r)     as a return value
	       *              *f      as a global pointer
	       *      [are there others that we miss?,
	       *       e.g. arrays of pointers to functions???]
	       */
	      arc_add (parent, &indirectchild, (unsigned long) 0);
	      length += vax_operandlength (instructp + length);
	      continue;
	    case byterel:
	    case wordrel:
	    case longrel:
	      /*
	       *    regular pc relative addressing
	       *      check that this is the address of
	       *      a function.
	       */
	      destpc = pc + vax_offset (instructp + length);
	      if (hist_check_address (destpc))
		{
		  child = sym_lookup (&symtab, destpc);
		  if (child)
		    {
		      DBG (CALLDEBUG,
		           printf ("[findcall]\tdestpc 0x%lx",
			           (unsigned long) destpc);
		           printf (" child->name %s", child->name);
		           printf (" child->addr 0x%lx\n",
			           (unsigned long) child->addr);
		        );
		      if (child->addr == destpc)
		        {
		          /*
		           *    a hit
		           */
		          arc_add (parent, child, (unsigned long) 0);
		          length += vax_operandlength (instructp + length);
		          continue;
		        }
		    }
		  goto botched;
		}
	      /*
	       *    else:
	       *      it looked like a calls,
	       *      but it wasn't to anywhere.
	       */
	      goto botched;
	    default:
	    botched:
	      /*
	       *    something funny going on.
	       */
	      DBG (CALLDEBUG, printf ("[findcall]\tbut it's a botch\n"));
	      length = 1;
	      continue;
	    }
	}
    }
}
Commit	Line	Data
252b5132	1	/*
5ec4a8f3 NC	2	* Copyright (c) 1983, 1993, 2001
5ec4a8f3 NC	3	* The Regents of the University of California. All rights reserved.
252b5132	4	*
5ec4a8f3 NC	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.
252b5132 RH	28	*/
252b5132 RH	29	#include "gprof.h"
6d9c411a AM	30	#include "search_list.h"
	31	#include "source.h"
	32	#include "symtab.h"
252b5132 RH	33	#include "cg_arcs.h"
	34	#include "corefile.h"
	35	#include "hist.h"
252b5132 RH	36
	37	/*
	38	* opcode of the `calls' instruction
	39	*/
	40	#define CALLS 0xfb
	41
	42	/*
	43	* register for pc relative addressing
	44	*/
	45	#define PC 0xf
	46
	47	enum opermodes
	48	{
	49	literal, indexed, reg, regdef, autodec, autoinc, autoincdef,
	50	bytedisp, bytedispdef, worddisp, worddispdef, longdisp, longdispdef,
	51	immediate, absolute, byterel, bytereldef, wordrel, wordreldef,
	52	longrel, longreldef
	53	};
	54	typedef enum opermodes operandenum;
	55
210c61aa	56	/* INDENT-OFF */
6d9c411a	57	/* Here to document only. We can't use this when cross compiling as
210c61aa BE	58	the bitfield layout might not be the same as native.
	59
	60	struct modebyte
	61	{
	62	unsigned int regfield:4;
	63	unsigned int modefield:4;
	64	};
	65	*/
	66	/* INDENT-ON */
252b5132 RH	67
	68	/*
	69	* A symbol to be the child of indirect calls:
	70	*/
3b04e729	71	static Sym indirectchild;
252b5132	72
3e8f6abf BE	73	static operandenum vax_operandmode (unsigned char *);
	74	static char *vax_operandname (operandenum);
	75	static long vax_operandlength (unsigned char *);
	76	static bfd_signed_vma vax_offset (unsigned char *);
	77	void vax_find_call (Sym *, bfd_vma, bfd_vma);
5789ecea	78
252b5132	79	static operandenum
3e8f6abf	80	vax_operandmode (unsigned char *modep)
252b5132	81	{
6d9c411a	82	int usesreg = *modep & 0xf;
252b5132	83
6d9c411a	84	switch ((*modep >> 4) & 0xf)
252b5132 RH	85	{
	86	case 0:
	87	case 1:
	88	case 2:
	89	case 3:
	90	return literal;
	91	case 4:
	92	return indexed;
	93	case 5:
	94	return reg;
	95	case 6:
	96	return regdef;
	97	case 7:
	98	return autodec;
	99	case 8:
	100	return usesreg != PC ? autoinc : immediate;
	101	case 9:
	102	return usesreg != PC ? autoincdef : absolute;
	103	case 10:
	104	return usesreg != PC ? bytedisp : byterel;
	105	case 11:
	106	return usesreg != PC ? bytedispdef : bytereldef;
	107	case 12:
	108	return usesreg != PC ? worddisp : wordrel;
	109	case 13:
	110	return usesreg != PC ? worddispdef : wordreldef;
	111	case 14:
	112	return usesreg != PC ? longdisp : longrel;
	113	case 15:
	114	return usesreg != PC ? longdispdef : longreldef;
	115	}
	116	/* NOTREACHED */
	117	abort ();
	118	}
	119
	120	static char *
3e8f6abf	121	vax_operandname (operandenum mode)
252b5132 RH	122	{
	123
	124	switch (mode)
	125	{
	126	case literal:
	127	return "literal";
	128	case indexed:
	129	return "indexed";
	130	case reg:
	131	return "register";
	132	case regdef:
	133	return "register deferred";
	134	case autodec:
	135	return "autodecrement";
	136	case autoinc:
	137	return "autoincrement";
	138	case autoincdef:
	139	return "autoincrement deferred";
	140	case bytedisp:
	141	return "byte displacement";
	142	case bytedispdef:
	143	return "byte displacement deferred";
	144	case byterel:
	145	return "byte relative";
	146	case bytereldef:
	147	return "byte relative deferred";
	148	case worddisp:
	149	return "word displacement";
	150	case worddispdef:
	151	return "word displacement deferred";
	152	case wordrel:
	153	return "word relative";
	154	case wordreldef:
	155	return "word relative deferred";
	156	case immediate:
	157	return "immediate";
	158	case absolute:
	159	return "absolute";
	160	case longdisp:
	161	return "long displacement";
	162	case longdispdef:
	163	return "long displacement deferred";
	164	case longrel:
	165	return "long relative";
	166	case longreldef:
	167	return "long relative deferred";
	168	}
	169	/* NOTREACHED */
	170	abort ();
	171	}
	172
	173	static long
3e8f6abf	174	vax_operandlength (unsigned char *modep)
252b5132 RH	175	{
	176
	177	switch (vax_operandmode (modep))
	178	{
	179	case literal:
	180	case reg:
	181	case regdef:
	182	case autodec:
	183	case autoinc:
	184	case autoincdef:
	185	return 1;
	186	case bytedisp:
	187	case bytedispdef:
	188	case byterel:
	189	case bytereldef:
	190	return 2;
	191	case worddisp:
	192	case worddispdef:
	193	case wordrel:
	194	case wordreldef:
	195	return 3;
	196	case immediate:
	197	case absolute:
	198	case longdisp:
	199	case longdispdef:
	200	case longrel:
	201	case longreldef:
	202	return 5;
	203	case indexed:
6d9c411a	204	return 1 + vax_operandlength (modep + 1);
252b5132 RH	205	}
	206	/* NOTREACHED */
	207	abort ();
	208	}
	209
6d9c411a	210	static bfd_signed_vma
3e8f6abf	211	vax_offset (unsigned char *modep)
252b5132 RH	212	{
252b5132 RH	213	operandenum mode = vax_operandmode (modep);
252b5132	214
6d9c411a	215	++modep; /* skip over the mode */
252b5132 RH	216	switch (mode)
	217	{
	218	default:
	219	fprintf (stderr, "[reladdr] not relative address\n");
6d9c411a	220	return 0;
252b5132	221	case byterel:
6d9c411a	222	return 1 + bfd_get_signed_8 (core_bfd, modep);
252b5132	223	case wordrel:
6d9c411a	224	return 2 + bfd_get_signed_16 (core_bfd, modep);
252b5132	225	case longrel:
6d9c411a	226	return 4 + bfd_get_signed_32 (core_bfd, modep);
252b5132 RH	227	}
	228	}
	229
	230
	231	void
3e8f6abf	232	vax_find_call (Sym *parent, bfd_vma p_lowpc, bfd_vma p_highpc)
252b5132 RH	233	{
	234	unsigned char *instructp;
	235	long length;
	236	Sym *child;
	237	operandenum mode;
	238	operandenum firstmode;
6d9c411a	239	bfd_vma pc, destpc;
b34976b6	240	static bfd_boolean inited = FALSE;
252b5132 RH	241
	242	if (!inited)
	243	{
b34976b6	244	inited = TRUE;
252b5132 RH	245	sym_init (&indirectchild);
	246	indirectchild.cg.prop.fract = 1.0;
	247	indirectchild.cg.cyc.head = &indirectchild;
	248	}
	249
252b5132	250	DBG (CALLDEBUG, printf ("[findcall] %s: 0x%lx to 0x%lx\n",
fdcf7d43 ILT	251	parent->name, (unsigned long) p_lowpc,
fdcf7d43 ILT	252	(unsigned long) p_highpc));
6d9c411a	253	for (pc = p_lowpc; pc < p_highpc; pc += length)
252b5132 RH	254	{
252b5132 RH	255	length = 1;
6d9c411a AM	256	instructp = ((unsigned char *) core_text_space
	257	+ pc - core_text_sect->vma);
	258	if ((*instructp & 0xff) == CALLS)
252b5132 RH	259	{
	260	/*
	261	* maybe a calls, better check it out.
	262	* skip the count of the number of arguments.
	263	*/
	264	DBG (CALLDEBUG,
6d9c411a AM	265	printf ("[findcall]\t0x%lx:calls", (unsigned long) pc));
6d9c411a AM	266	firstmode = vax_operandmode (instructp + length);
252b5132 RH	267	switch (firstmode)
	268	{
	269	case literal:
	270	case immediate:
	271	break;
	272	default:
	273	goto botched;
	274	}
6d9c411a AM	275	length += vax_operandlength (instructp + length);
6d9c411a AM	276	mode = vax_operandmode (instructp + length);
252b5132 RH	277	DBG (CALLDEBUG,
	278	printf ("\tfirst operand is %s", vax_operandname (firstmode));
	279	printf ("\tsecond operand is %s\n", vax_operandname (mode)));
	280	switch (mode)
	281	{
	282	case regdef:
	283	case bytedispdef:
	284	case worddispdef:
	285	case longdispdef:
	286	case bytereldef:
	287	case wordreldef:
	288	case longreldef:
	289	/*
	290	* indirect call: call through pointer
	291	* either *d(r) as a parameter or local
	292	* (r) as a return value
	293	* *f as a global pointer
	294	* [are there others that we miss?,
	295	* e.g. arrays of pointers to functions???]
	296	*/
	297	arc_add (parent, &indirectchild, (unsigned long) 0);
6d9c411a	298	length += vax_operandlength (instructp + length);
252b5132 RH	299	continue;
	300	case byterel:
	301	case wordrel:
	302	case longrel:
	303	/*
	304	* regular pc relative addressing
0eee5820	305	* check that this is the address of
252b5132 RH	306	* a function.
252b5132 RH	307	*/
6d9c411a	308	destpc = pc + vax_offset (instructp + length);
b3296dc5	309	if (hist_check_address (destpc))
252b5132 RH	310	{
252b5132 RH	311	child = sym_lookup (&symtab, destpc);
d401d98a	312	if (child)
252b5132	313	{
d401d98a AM	314	DBG (CALLDEBUG,
	315	printf ("[findcall]\tdestpc 0x%lx",
	316	(unsigned long) destpc);
	317	printf (" child->name %s", child->name);
	318	printf (" child->addr 0x%lx\n",
	319	(unsigned long) child->addr);
	320	);
	321	if (child->addr == destpc)
	322	{
	323	/*
	324	* a hit
	325	*/
	326	arc_add (parent, child, (unsigned long) 0);
	327	length += vax_operandlength (instructp + length);
	328	continue;
	329	}
252b5132 RH	330	}
	331	goto botched;
	332	}
	333	/*
	334	* else:
	335	* it looked like a calls,
	336	* but it wasn't to anywhere.
	337	*/
	338	goto botched;
	339	default:
	340	botched:
	341	/*
	342	* something funny going on.
	343	*/
	344	DBG (CALLDEBUG, printf ("[findcall]\tbut it's a botch\n"));
	345	length = 1;
	346	continue;
	347	}
	348	}
	349	}
	350	}