[binutils.git] / gprof / vax.c

/*
 * Copyright (c) 1983, 2001 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 "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;

#if 0
/* 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;
  };
#endif

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

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

static operandenum
vax_operandmode (modep)
     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 (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)
     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 (modep)
     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 (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 pc, destpc;
  static boolean 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, (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 (destpc >= s_lowpc && destpc <= s_highpc)
		{
		  child = sym_lookup (&symtab, destpc);
		  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	/*
0eee5820	2	* Copyright (c) 1983, 2001 Regents of the University of California.
252b5132 RH	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	*/
	19	#include "gprof.h"
6d9c411a AM	20	#include "search_list.h"
	21	#include "source.h"
	22	#include "symtab.h"
252b5132 RH	23	#include "cg_arcs.h"
	24	#include "corefile.h"
	25	#include "hist.h"
252b5132 RH	26
	27	/*
	28	* opcode of the `calls' instruction
	29	*/
	30	#define CALLS 0xfb
	31
	32	/*
	33	* register for pc relative addressing
	34	*/
	35	#define PC 0xf
	36
	37	enum opermodes
	38	{
	39	literal, indexed, reg, regdef, autodec, autoinc, autoincdef,
	40	bytedisp, bytedispdef, worddisp, worddispdef, longdisp, longdispdef,
	41	immediate, absolute, byterel, bytereldef, wordrel, wordreldef,
	42	longrel, longreldef
	43	};
	44	typedef enum opermodes operandenum;
	45
6d9c411a AM	46	#if 0
	47	/* Here to document only. We can't use this when cross compiling as
	48	the bitfield layout might not be the same as native. */
252b5132 RH	49	struct modebyte
	50	{
	51	unsigned int regfield:4;
	52	unsigned int modefield:4;
	53	};
6d9c411a	54	#endif
252b5132 RH	55
	56	/*
	57	* A symbol to be the child of indirect calls:
	58	*/
3b04e729	59	static Sym indirectchild;
252b5132	60
6d9c411a	61	static operandenum vax_operandmode PARAMS ((unsigned char *));
5789ecea	62	static char *vax_operandname PARAMS ((operandenum));
6d9c411a AM	63	static long vax_operandlength PARAMS ((unsigned char *));
6d9c411a AM	64	static bfd_signed_vma vax_offset PARAMS ((unsigned char *));
5789ecea AM	65	void vax_find_call PARAMS ((Sym *, bfd_vma, bfd_vma));
5789ecea AM	66
252b5132 RH	67	static operandenum
252b5132 RH	68	vax_operandmode (modep)
6d9c411a	69	unsigned char *modep;
252b5132	70	{
6d9c411a	71	int usesreg = *modep & 0xf;
252b5132	72
6d9c411a	73	switch ((*modep >> 4) & 0xf)
252b5132 RH	74	{
	75	case 0:
	76	case 1:
	77	case 2:
	78	case 3:
	79	return literal;
	80	case 4:
	81	return indexed;
	82	case 5:
	83	return reg;
	84	case 6:
	85	return regdef;
	86	case 7:
	87	return autodec;
	88	case 8:
	89	return usesreg != PC ? autoinc : immediate;
	90	case 9:
	91	return usesreg != PC ? autoincdef : absolute;
	92	case 10:
	93	return usesreg != PC ? bytedisp : byterel;
	94	case 11:
	95	return usesreg != PC ? bytedispdef : bytereldef;
	96	case 12:
	97	return usesreg != PC ? worddisp : wordrel;
	98	case 13:
	99	return usesreg != PC ? worddispdef : wordreldef;
	100	case 14:
	101	return usesreg != PC ? longdisp : longrel;
	102	case 15:
	103	return usesreg != PC ? longdispdef : longreldef;
	104	}
	105	/* NOTREACHED */
	106	abort ();
	107	}
	108
	109	static char *
	110	vax_operandname (mode)
	111	operandenum mode;
	112	{
	113
	114	switch (mode)
	115	{
	116	case literal:
	117	return "literal";
	118	case indexed:
	119	return "indexed";
	120	case reg:
	121	return "register";
	122	case regdef:
	123	return "register deferred";
	124	case autodec:
	125	return "autodecrement";
	126	case autoinc:
	127	return "autoincrement";
	128	case autoincdef:
	129	return "autoincrement deferred";
	130	case bytedisp:
	131	return "byte displacement";
	132	case bytedispdef:
	133	return "byte displacement deferred";
	134	case byterel:
	135	return "byte relative";
	136	case bytereldef:
	137	return "byte relative deferred";
138	case worddisp:
139	return "word displacement";
140	case worddispdef:
141	return "word displacement deferred";
142	case wordrel:
143	return "word relative";
144	case wordreldef:
145	return "word relative deferred";
146	case immediate:
147	return "immediate";
148	case absolute:
149	return "absolute";
150	case longdisp:
151	return "long displacement";
152	case longdispdef:
153	return "long displacement deferred";
154	case longrel:
155	return "long relative";
156	case longreldef:
157	return "long relative deferred";
158	}
159	/* NOTREACHED */
160	abort ();
161	}
162
163	static long
164	vax_operandlength (modep)
6d9c411a	165	unsigned char *modep;
252b5132 RH	166	{
	167
	168	switch (vax_operandmode (modep))
	169	{
	170	case literal:
	171	case reg:
	172	case regdef:
	173	case autodec:
	174	case autoinc:
	175	case autoincdef:
	176	return 1;
	177	case bytedisp:
	178	case bytedispdef:
	179	case byterel:
	180	case bytereldef:
	181	return 2;
	182	case worddisp:
	183	case worddispdef:
	184	case wordrel:
	185	case wordreldef:
	186	return 3;
	187	case immediate:
	188	case absolute:
	189	case longdisp:
	190	case longdispdef:
	191	case longrel:
	192	case longreldef:
	193	return 5;
	194	case indexed:
6d9c411a	195	return 1 + vax_operandlength (modep + 1);
252b5132 RH	196	}
	197	/* NOTREACHED */
	198	abort ();
	199	}
	200
6d9c411a AM	201	static bfd_signed_vma
	202	vax_offset (modep)
	203	unsigned char *modep;
252b5132 RH	204	{
252b5132 RH	205	operandenum mode = vax_operandmode (modep);
252b5132	206
6d9c411a	207	++modep; /* skip over the mode */
252b5132 RH	208	switch (mode)
	209	{
	210	default:
	211	fprintf (stderr, "[reladdr] not relative address\n");
6d9c411a	212	return 0;
252b5132	213	case byterel:
6d9c411a	214	return 1 + bfd_get_signed_8 (core_bfd, modep);
252b5132	215	case wordrel:
6d9c411a	216	return 2 + bfd_get_signed_16 (core_bfd, modep);
252b5132	217	case longrel:
6d9c411a	218	return 4 + bfd_get_signed_32 (core_bfd, modep);
252b5132 RH	219	}
	220	}
	221
	222
	223	void
	224	vax_find_call (parent, p_lowpc, p_highpc)
	225	Sym *parent;
	226	bfd_vma p_lowpc;
	227	bfd_vma p_highpc;
	228	{
	229	unsigned char *instructp;
	230	long length;
	231	Sym *child;
	232	operandenum mode;
	233	operandenum firstmode;
6d9c411a	234	bfd_vma pc, destpc;
bde52789	235	static boolean inited = false;
252b5132 RH	236
	237	if (!inited)
	238	{
bde52789	239	inited = true;
252b5132 RH	240	sym_init (&indirectchild);
	241	indirectchild.cg.prop.fract = 1.0;
	242	indirectchild.cg.cyc.head = &indirectchild;
	243	}
	244
	245	if (core_text_space == 0)
	246	{
	247	return;
	248	}
	249	if (p_lowpc < s_lowpc)
	250	{
	251	p_lowpc = s_lowpc;
	252	}
	253	if (p_highpc > s_highpc)
	254	{
	255	p_highpc = s_highpc;
	256	}
	257	DBG (CALLDEBUG, printf ("[findcall] %s: 0x%lx to 0x%lx\n",
fdcf7d43 ILT	258	parent->name, (unsigned long) p_lowpc,
fdcf7d43 ILT	259	(unsigned long) p_highpc));
6d9c411a	260	for (pc = p_lowpc; pc < p_highpc; pc += length)
252b5132 RH	261	{
252b5132 RH	262	length = 1;
6d9c411a AM	263	instructp = ((unsigned char *) core_text_space
	264	+ pc - core_text_sect->vma);
	265	if ((*instructp & 0xff) == CALLS)
252b5132 RH	266	{
	267	/*
	268	* maybe a calls, better check it out.
	269	* skip the count of the number of arguments.
	270	*/
	271	DBG (CALLDEBUG,
6d9c411a AM	272	printf ("[findcall]\t0x%lx:calls", (unsigned long) pc));
6d9c411a AM	273	firstmode = vax_operandmode (instructp + length);
252b5132 RH	274	switch (firstmode)
	275	{
	276	case literal:
	277	case immediate:
	278	break;
	279	default:
	280	goto botched;
	281	}
6d9c411a AM	282	length += vax_operandlength (instructp + length);
6d9c411a AM	283	mode = vax_operandmode (instructp + length);
252b5132 RH	284	DBG (CALLDEBUG,
	285	printf ("\tfirst operand is %s", vax_operandname (firstmode));
	286	printf ("\tsecond operand is %s\n", vax_operandname (mode)));
	287	switch (mode)
	288	{
	289	case regdef:
	290	case bytedispdef:
	291	case worddispdef:
	292	case longdispdef:
	293	case bytereldef:
	294	case wordreldef:
	295	case longreldef:
	296	/*
	297	* indirect call: call through pointer
	298	* either *d(r) as a parameter or local
	299	* (r) as a return value
	300	* *f as a global pointer
	301	* [are there others that we miss?,
	302	* e.g. arrays of pointers to functions???]
	303	*/
	304	arc_add (parent, &indirectchild, (unsigned long) 0);
6d9c411a	305	length += vax_operandlength (instructp + length);
252b5132 RH	306	continue;
	307	case byterel:
	308	case wordrel:
	309	case longrel:
	310	/*
	311	* regular pc relative addressing
0eee5820	312	* check that this is the address of
252b5132 RH	313	* a function.
252b5132 RH	314	*/
6d9c411a	315	destpc = pc + vax_offset (instructp + length);
252b5132 RH	316	if (destpc >= s_lowpc && destpc <= s_highpc)
	317	{
	318	child = sym_lookup (&symtab, destpc);
	319	DBG (CALLDEBUG,
fdcf7d43 ILT	320	printf ("[findcall]\tdestpc 0x%lx",
fdcf7d43 ILT	321	(unsigned long) destpc);
252b5132	322	printf (" child->name %s", child->name);
fdcf7d43 ILT	323	printf (" child->addr 0x%lx\n",
fdcf7d43 ILT	324	(unsigned long) child->addr);
252b5132 RH	325	);
	326	if (child->addr == destpc)
	327	{
	328	/*
	329	* a hit
	330	*/
	331	arc_add (parent, child, (unsigned long) 0);
6d9c411a	332	length += vax_operandlength (instructp + length);
252b5132 RH	333	continue;
	334	}
	335	goto botched;
	336	}
	337	/*
	338	* else:
	339	* it looked like a calls,
	340	* but it wasn't to anywhere.
	341	*/
	342	goto botched;
	343	default:
	344	botched:
	345	/*
	346	* something funny going on.
	347	*/
	348	DBG (CALLDEBUG, printf ("[findcall]\tbut it's a botch\n"));
	349	length = 1;
	350	continue;
	351	}
	352	}
	353	}
	354	}