[thirdparty/binutils-gdb.git] / gprof / vax.c

/*
 * Copyright (c) 1983 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that: (1) source distributions retain this entire copyright
 * notice and comment, and (2) distributions including binaries display
 * the following acknowledgement:  ``This product includes software
 * developed by the University of California, Berkeley and its contributors''
 * in the documentation or other materials provided with the distribution
 * and in all advertising materials mentioning features or use of this
 * software. 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */
#include "gprof.h"
#include "cg_arcs.h"
#include "corefile.h"
#include "hist.h"
#include "symtab.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;

struct modebyte
  {
    unsigned int regfield:4;
    unsigned int modefield:4;
  };

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


static operandenum
vax_operandmode (modep)
     struct modebyte *modep;
{
  long usesreg = modep->regfield;

  switch (modep->modefield)
    {
    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 (mode)
     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 (modep)
     struct modebyte *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 ((struct modebyte *) ((char *) modep) + 1);
    }
  /* NOTREACHED */
  abort ();
}

static bfd_vma
vax_reladdr (modep)
     struct modebyte *modep;
{
  operandenum mode = vax_operandmode (modep);
  char *cp;
  short *sp;
  long *lp;

  cp = (char *) modep;
  ++cp;				/* skip over the mode */
  switch (mode)
    {
    default:
      fprintf (stderr, "[reladdr] not relative address\n");
      return (bfd_vma) modep;
    case byterel:
      return (bfd_vma) (cp + sizeof *cp + *cp);
    case wordrel:
      sp = (short *) cp;
      return (bfd_vma) (cp + sizeof *sp + *sp);
    case longrel:
      lp = (long *) cp;
      return (bfd_vma) (cp + sizeof *lp + *lp);
    }
}


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

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

  if (core_text_space == 0)
    {
      return;
    }
  if (p_lowpc < s_lowpc)
    {
      p_lowpc = s_lowpc;
    }
  if (p_highpc > s_highpc)
    {
      p_highpc = s_highpc;
    }
  DBG (CALLDEBUG, printf ("[findcall] %s: 0x%lx to 0x%lx\n",
			  parent->name, p_lowpc, p_highpc));
  for (instructp = (unsigned char *) core_text_space + p_lowpc;
       instructp < (unsigned char *) core_text_space + p_highpc;
       instructp += length)
    {
      length = 1;
      if (*instructp == CALLS)
	{
	  /*
	   *    maybe a calls, better check it out.
	   *      skip the count of the number of arguments.
	   */
	  DBG (CALLDEBUG,
	       printf ("[findcall]\t0x%x:calls",
		       instructp - (unsigned char *) core_text_space));
	  firstmode = vax_operandmode ((struct modebyte *) (instructp + length));
	  switch (firstmode)
	    {
	    case literal:
	    case immediate:
	      break;
	    default:
	      goto botched;
	    }
	  length += vax_operandlength ((struct modebyte *) (instructp + length));
	  mode = vax_operandmode ((struct modebyte *) (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 (
				  (struct modebyte *) (instructp + length));
	      continue;
	    case byterel:
	    case wordrel:
	    case longrel:
	      /*
	       *    regular pc relative addressing
	       *      check that this is the address of 
	       *      a function.
	       */
	      destpc = vax_reladdr ((struct modebyte *) (instructp + length))
		- (bfd_vma) core_text_space;
	      if (destpc >= s_lowpc && destpc <= s_highpc)
		{
		  child = sym_lookup (&symtab, destpc);
		  DBG (CALLDEBUG,
		       printf ("[findcall]\tdestpc 0x%lx", destpc);
		       printf (" child->name %s", child->name);
		       printf (" child->addr 0x%lx\n", child->addr);
		    );
		  if (child->addr == destpc)
		    {
		      /*
		       *    a hit
		       */
		      arc_add (parent, child, (unsigned long) 0);
		      length += vax_operandlength ((struct modebyte *)
						   (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
3d6c6501 SEF	1	/*
	2	* Copyright (c) 1983 Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms are permitted
	6	* provided that: (1) source distributions retain this entire copyright
	7	* notice and comment, and (2) distributions including binaries display
	8	* the following acknowledgement: ``This product includes software
	9	* developed by the University of California, Berkeley and its contributors''
	10	* in the documentation or other materials provided with the distribution
	11	* and in all advertising materials mentioning features or use of this
	12	* software. Neither the name of the University nor the names of its
	13	* contributors may be used to endorse or promote products derived
	14	* from this software without specific prior written permission.
	15	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
	16	* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
	17	* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
	18	*/
5489fcc3 KR	19	#include "gprof.h"
5489fcc3 KR	20	#include "cg_arcs.h"
43870aec	21	#include "corefile.h"
5489fcc3 KR	22	#include "hist.h"
5489fcc3 KR	23	#include "symtab.h"
3d6c6501	24
c3de2a19 ILT	25	/*
	26	* opcode of the `calls' instruction
	27	*/
	28	#define CALLS 0xfb
	29
	30	/*
	31	* register for pc relative addressing
	32	*/
	33	#define PC 0xf
	34
	35	enum opermodes
	36	{
	37	literal, indexed, reg, regdef, autodec, autoinc, autoincdef,
	38	bytedisp, bytedispdef, worddisp, worddispdef, longdisp, longdispdef,
	39	immediate, absolute, byterel, bytereldef, wordrel, wordreldef,
	40	longrel, longreldef
	41	};
	42	typedef enum opermodes operandenum;
	43
	44	struct modebyte
	45	{
	46	unsigned int regfield:4;
	47	unsigned int modefield:4;
	48	};
	49
5489fcc3 KR	50	/*
	51	* A symbol to be the child of indirect calls:
	52	*/
	53	Sym indirectchild;
3d6c6501	54
3d6c6501	55
5489fcc3	56	static operandenum
c3de2a19	57	vax_operandmode (modep)
12516a37	58	struct modebyte *modep;
3d6c6501	59	{
12516a37 KR	60	long usesreg = modep->regfield;
	61
	62	switch (modep->modefield)
	63	{
	64	case 0:
	65	case 1:
	66	case 2:
	67	case 3:
	68	return literal;
	69	case 4:
	70	return indexed;
	71	case 5:
	72	return reg;
	73	case 6:
	74	return regdef;
	75	case 7:
	76	return autodec;
	77	case 8:
	78	return usesreg != PC ? autoinc : immediate;
	79	case 9:
	80	return usesreg != PC ? autoincdef : absolute;
	81	case 10:
	82	return usesreg != PC ? bytedisp : byterel;
	83	case 11:
	84	return usesreg != PC ? bytedispdef : bytereldef;
	85	case 12:
	86	return usesreg != PC ? worddisp : wordrel;
	87	case 13:
	88	return usesreg != PC ? worddispdef : wordreldef;
	89	case 14:
	90	return usesreg != PC ? longdisp : longrel;
	91	case 15:
	92	return usesreg != PC ? longdispdef : longreldef;
3d6c6501	93	}
12516a37	94	/* NOTREACHED */
c3de2a19	95	abort ();
3d6c6501 SEF	96	}
3d6c6501 SEF	97
5489fcc3	98	static char *
c3de2a19	99	vax_operandname (mode)
12516a37	100	operandenum mode;
3d6c6501	101	{
12516a37 KR	102
	103	switch (mode)
	104	{
	105	case literal:
	106	return "literal";
	107	case indexed:
	108	return "indexed";
	109	case reg:
	110	return "register";
	111	case regdef:
	112	return "register deferred";
	113	case autodec:
	114	return "autodecrement";
	115	case autoinc:
	116	return "autoincrement";
	117	case autoincdef:
	118	return "autoincrement deferred";
	119	case bytedisp:
	120	return "byte displacement";
	121	case bytedispdef:
	122	return "byte displacement deferred";
	123	case byterel:
	124	return "byte relative";
	125	case bytereldef:
	126	return "byte relative deferred";
	127	case worddisp:
	128	return "word displacement";
	129	case worddispdef:
	130	return "word displacement deferred";
	131	case wordrel:
	132	return "word relative";
	133	case wordreldef:
	134	return "word relative deferred";
	135	case immediate:
	136	return "immediate";
	137	case absolute:
	138	return "absolute";
	139	case longdisp:
	140	return "long displacement";
	141	case longdispdef:
	142	return "long displacement deferred";
	143	case longrel:
	144	return "long relative";
	145	case longreldef:
	146	return "long relative deferred";
3d6c6501	147	}
12516a37	148	/* NOTREACHED */
c3de2a19	149	abort ();
3d6c6501 SEF	150	}
3d6c6501 SEF	151
5489fcc3	152	static long
c3de2a19	153	vax_operandlength (modep)
12516a37	154	struct modebyte *modep;
3d6c6501	155	{
12516a37	156
c3de2a19	157	switch (vax_operandmode (modep))
12516a37 KR	158	{
	159	case literal:
	160	case reg:
	161	case regdef:
	162	case autodec:
	163	case autoinc:
	164	case autoincdef:
	165	return 1;
	166	case bytedisp:
	167	case bytedispdef:
	168	case byterel:
	169	case bytereldef:
	170	return 2;
	171	case worddisp:
	172	case worddispdef:
	173	case wordrel:
	174	case wordreldef:
	175	return 3;
	176	case immediate:
	177	case absolute:
	178	case longdisp:
	179	case longdispdef:
	180	case longrel:
	181	case longreldef:
	182	return 5;
	183	case indexed:
c3de2a19	184	return 1 + vax_operandlength ((struct modebyte ) ((char ) modep) + 1);
3d6c6501	185	}
12516a37	186	/* NOTREACHED */
c3de2a19	187	abort ();
3d6c6501 SEF	188	}
3d6c6501 SEF	189
5489fcc3	190	static bfd_vma
c3de2a19	191	vax_reladdr (modep)
12516a37	192	struct modebyte *modep;
3d6c6501	193	{
c3de2a19	194	operandenum mode = vax_operandmode (modep);
12516a37 KR	195	char *cp;
	196	short *sp;
	197	long *lp;
3d6c6501	198
12516a37 KR	199	cp = (char *) modep;
	200	++cp; /* skip over the mode */
	201	switch (mode)
	202	{
	203	default:
	204	fprintf (stderr, "[reladdr] not relative address\n");
	205	return (bfd_vma) modep;
	206	case byterel:
	207	return (bfd_vma) (cp + sizeof cp + cp);
	208	case wordrel:
	209	sp = (short *) cp;
	210	return (bfd_vma) (cp + sizeof sp + sp);
	211	case longrel:
	212	lp = (long *) cp;
	213	return (bfd_vma) (cp + sizeof lp + lp);
3d6c6501 SEF	214	}
	215	}
	216
5489fcc3 KR	217
5489fcc3 KR	218	void
c3de2a19	219	vax_find_call (parent, p_lowpc, p_highpc)
5489fcc3 KR	220	Sym *parent;
	221	bfd_vma p_lowpc;
	222	bfd_vma p_highpc;
3d6c6501	223	{
12516a37 KR	224	unsigned char *instructp;
	225	long length;
	226	Sym *child;
	227	operandenum mode;
	228	operandenum firstmode;
	229	bfd_vma destpc;
	230	static bool inited = FALSE;
3d6c6501	231
12516a37 KR	232	if (!inited)
	233	{
	234	inited = TRUE;
	235	sym_init (&indirectchild);
	236	indirectchild.cg.prop.fract = 1.0;
	237	indirectchild.cg.cyc.head = &indirectchild;
03c35bcb	238	}
5489fcc3	239
12516a37 KR	240	if (core_text_space == 0)
	241	{
	242	return;
3d6c6501	243	}
12516a37 KR	244	if (p_lowpc < s_lowpc)
	245	{
	246	p_lowpc = s_lowpc;
3d6c6501	247	}
12516a37 KR	248	if (p_highpc > s_highpc)
	249	{
	250	p_highpc = s_highpc;
3d6c6501	251	}
12516a37	252	DBG (CALLDEBUG, printf ("[findcall] %s: 0x%lx to 0x%lx\n",
5489fcc3	253	parent->name, p_lowpc, p_highpc));
12516a37 KR	254	for (instructp = (unsigned char *) core_text_space + p_lowpc;
	255	instructp < (unsigned char *) core_text_space + p_highpc;
	256	instructp += length)
	257	{
	258	length = 1;
	259	if (*instructp == CALLS)
	260	{
	261	/*
	262	* maybe a calls, better check it out.
	263	* skip the count of the number of arguments.
	264	*/
	265	DBG (CALLDEBUG,
	266	printf ("[findcall]\t0x%x:calls",
	267	instructp - (unsigned char *) core_text_space));
c3de2a19	268	firstmode = vax_operandmode ((struct modebyte *) (instructp + length));
12516a37 KR	269	switch (firstmode)
	270	{
	271	case literal:
	272	case immediate:
	273	break;
	274	default:
	275	goto botched;
3d6c6501	276	}
c3de2a19 ILT	277	length += vax_operandlength ((struct modebyte *) (instructp + length));
c3de2a19 ILT	278	mode = vax_operandmode ((struct modebyte *) (instructp + length));
12516a37	279	DBG (CALLDEBUG,
c3de2a19 ILT	280	printf ("\tfirst operand is %s", vax_operandname (firstmode));
c3de2a19 ILT	281	printf ("\tsecond operand is %s\n", vax_operandname (mode)));
12516a37 KR	282	switch (mode)
	283	{
	284	case regdef:
	285	case bytedispdef:
	286	case worddispdef:
	287	case longdispdef:
	288	case bytereldef:
	289	case wordreldef:
	290	case longreldef:
	291	/*
	292	* indirect call: call through pointer
	293	* either *d(r) as a parameter or local
	294	* (r) as a return value
	295	* *f as a global pointer
	296	* [are there others that we miss?,
	297	* e.g. arrays of pointers to functions???]
	298	*/
8c73afb3	299	arc_add (parent, &indirectchild, (unsigned long) 0);
c3de2a19	300	length += vax_operandlength (
12516a37 KR	301	(struct modebyte *) (instructp + length));
	302	continue;
	303	case byterel:
	304	case wordrel:
	305	case longrel:
	306	/*
	307	* regular pc relative addressing
	308	* check that this is the address of
	309	* a function.
	310	*/
c3de2a19	311	destpc = vax_reladdr ((struct modebyte *) (instructp + length))
12516a37 KR	312	- (bfd_vma) core_text_space;
	313	if (destpc >= s_lowpc && destpc <= s_highpc)
	314	{
	315	child = sym_lookup (&symtab, destpc);
	316	DBG (CALLDEBUG,
	317	printf ("[findcall]\tdestpc 0x%lx", destpc);
	318	printf (" child->name %s", child->name);
	319	printf (" child->addr 0x%lx\n", child->addr);
	320	);
	321	if (child->addr == destpc)
	322	{
	323	/*
	324	* a hit
	325	*/
8c73afb3	326	arc_add (parent, child, (unsigned long) 0);
c3de2a19 ILT	327	length += vax_operandlength ((struct modebyte *)
c3de2a19 ILT	328	(instructp + length));
12516a37	329	continue;
3d6c6501	330	}
12516a37 KR	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;
3d6c6501 SEF	347	}
	348	}
	349	}
	350	}