[deliverable/binutils-gdb.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 "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:
 */
static Sym indirectchild;

static operandenum vax_operandmode PARAMS ((struct modebyte *));
static char *vax_operandname PARAMS ((operandenum));
static long vax_operandlength PARAMS ((struct modebyte *));
static bfd_vma vax_reladdr PARAMS ((struct modebyte *));
void vax_find_call PARAMS ((Sym *, bfd_vma, bfd_vma));

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, (unsigned long) p_lowpc,
			  (unsigned long) 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%lx:calls",
		       ((unsigned long)
			(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",
			       (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 ((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
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"
	20	#include "cg_arcs.h"
	21	#include "corefile.h"
	22	#include "hist.h"
	23	#include "symtab.h"
	24
	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
	50	/*
	51	* A symbol to be the child of indirect calls:
	52	*/
3b04e729	53	static Sym indirectchild;
252b5132	54
5789ecea AM	55	static operandenum vax_operandmode PARAMS ((struct modebyte *));
	56	static char *vax_operandname PARAMS ((operandenum));
	57	static long vax_operandlength PARAMS ((struct modebyte *));
	58	static bfd_vma vax_reladdr PARAMS ((struct modebyte *));
	59	void vax_find_call PARAMS ((Sym *, bfd_vma, bfd_vma));
	60
252b5132 RH	61	static operandenum
	62	vax_operandmode (modep)
	63	struct modebyte *modep;
	64	{
	65	long usesreg = modep->regfield;
	66
	67	switch (modep->modefield)
	68	{
	69	case 0:
	70	case 1:
	71	case 2:
	72	case 3:
	73	return literal;
	74	case 4:
	75	return indexed;
	76	case 5:
	77	return reg;
	78	case 6:
	79	return regdef;
	80	case 7:
	81	return autodec;
	82	case 8:
	83	return usesreg != PC ? autoinc : immediate;
	84	case 9:
	85	return usesreg != PC ? autoincdef : absolute;
	86	case 10:
	87	return usesreg != PC ? bytedisp : byterel;
	88	case 11:
	89	return usesreg != PC ? bytedispdef : bytereldef;
	90	case 12:
	91	return usesreg != PC ? worddisp : wordrel;
	92	case 13:
	93	return usesreg != PC ? worddispdef : wordreldef;
	94	case 14:
	95	return usesreg != PC ? longdisp : longrel;
	96	case 15:
	97	return usesreg != PC ? longdispdef : longreldef;
	98	}
	99	/* NOTREACHED */
	100	abort ();
	101	}
	102
	103	static char *
	104	vax_operandname (mode)
	105	operandenum mode;
	106	{
	107
	108	switch (mode)
	109	{
	110	case literal:
	111	return "literal";
	112	case indexed:
	113	return "indexed";
	114	case reg:
	115	return "register";
	116	case regdef:
	117	return "register deferred";
	118	case autodec:
	119	return "autodecrement";
	120	case autoinc:
	121	return "autoincrement";
	122	case autoincdef:
	123	return "autoincrement deferred";
	124	case bytedisp:
125	return "byte displacement";
126	case bytedispdef:
127	return "byte displacement deferred";
128	case byterel:
129	return "byte relative";
130	case bytereldef:
131	return "byte relative deferred";
132	case worddisp:
133	return "word displacement";
134	case worddispdef:
135	return "word displacement deferred";
136	case wordrel:
137	return "word relative";
138	case wordreldef:
139	return "word relative deferred";
140	case immediate:
141	return "immediate";
142	case absolute:
143	return "absolute";
144	case longdisp:
145	return "long displacement";
146	case longdispdef:
147	return "long displacement deferred";
148	case longrel:
149	return "long relative";
150	case longreldef:
151	return "long relative deferred";
152	}
153	/* NOTREACHED */
154	abort ();
155	}
156
157	static long
158	vax_operandlength (modep)
159	struct modebyte *modep;
160	{
161
162	switch (vax_operandmode (modep))
163	{
164	case literal:
165	case reg:
166	case regdef:
167	case autodec:
168	case autoinc:
169	case autoincdef:
170	return 1;
171	case bytedisp:
172	case bytedispdef:
173	case byterel:
174	case bytereldef:
175	return 2;
176	case worddisp:
177	case worddispdef:
178	case wordrel:
179	case wordreldef:
180	return 3;
181	case immediate:
182	case absolute:
183	case longdisp:
184	case longdispdef:
185	case longrel:
186	case longreldef:
187	return 5;
188	case indexed:
189	return 1 + vax_operandlength ((struct modebyte ) ((char ) modep) + 1);
190	}
191	/* NOTREACHED */
192	abort ();
193	}
194
195	static bfd_vma
196	vax_reladdr (modep)
197	struct modebyte *modep;
198	{
199	operandenum mode = vax_operandmode (modep);
200	char *cp;
201	short *sp;
202	long *lp;
203
204	cp = (char *) modep;
205	++cp; /* skip over the mode */
206	switch (mode)
207	{
208	default:
209	fprintf (stderr, "[reladdr] not relative address\n");
210	return (bfd_vma) modep;
211	case byterel:
212	return (bfd_vma) (cp + sizeof cp + cp);
213	case wordrel:
214	sp = (short *) cp;
215	return (bfd_vma) (cp + sizeof sp + sp);
216	case longrel:
217	lp = (long *) cp;
218	return (bfd_vma) (cp + sizeof lp + lp);
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;
234	bfd_vma destpc;
235	static bool inited = FALSE;
236
237	if (!inited)
238	{
239	inited = TRUE;
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));
252b5132 RH	260	for (instructp = (unsigned char *) core_text_space + p_lowpc;
	261	instructp < (unsigned char *) core_text_space + p_highpc;
	262	instructp += length)
	263	{
	264	length = 1;
	265	if (*instructp == CALLS)
	266	{
	267	/*
	268	* maybe a calls, better check it out.
	269	* skip the count of the number of arguments.
	270	*/
	271	DBG (CALLDEBUG,
0e69fcbc ILT	272	printf ("[findcall]\t0x%lx:calls",
	273	((unsigned long)
	274	(instructp - (unsigned char *) core_text_space))));
252b5132 RH	275	firstmode = vax_operandmode ((struct modebyte *) (instructp + length));
	276	switch (firstmode)
	277	{
	278	case literal:
	279	case immediate:
	280	break;
	281	default:
	282	goto botched;
	283	}
	284	length += vax_operandlength ((struct modebyte *) (instructp + length));
	285	mode = vax_operandmode ((struct modebyte *) (instructp + length));
	286	DBG (CALLDEBUG,
	287	printf ("\tfirst operand is %s", vax_operandname (firstmode));
	288	printf ("\tsecond operand is %s\n", vax_operandname (mode)));
	289	switch (mode)
	290	{
	291	case regdef:
	292	case bytedispdef:
	293	case worddispdef:
	294	case longdispdef:
	295	case bytereldef:
	296	case wordreldef:
	297	case longreldef:
	298	/*
	299	* indirect call: call through pointer
	300	* either *d(r) as a parameter or local
	301	* (r) as a return value
	302	* *f as a global pointer
	303	* [are there others that we miss?,
	304	* e.g. arrays of pointers to functions???]
	305	*/
	306	arc_add (parent, &indirectchild, (unsigned long) 0);
	307	length += vax_operandlength (
	308	(struct modebyte *) (instructp + length));
	309	continue;
	310	case byterel:
	311	case wordrel:
	312	case longrel:
	313	/*
	314	* regular pc relative addressing
0eee5820	315	* check that this is the address of
252b5132 RH	316	* a function.
	317	*/
	318	destpc = vax_reladdr ((struct modebyte *) (instructp + length))
	319	- (bfd_vma) core_text_space;
	320	if (destpc >= s_lowpc && destpc <= s_highpc)
	321	{
	322	child = sym_lookup (&symtab, destpc);
	323	DBG (CALLDEBUG,
fdcf7d43 ILT	324	printf ("[findcall]\tdestpc 0x%lx",
fdcf7d43 ILT	325	(unsigned long) destpc);
252b5132	326	printf (" child->name %s", child->name);
fdcf7d43 ILT	327	printf (" child->addr 0x%lx\n",
fdcf7d43 ILT	328	(unsigned long) child->addr);
252b5132 RH	329	);
	330	if (child->addr == destpc)
	331	{
	332	/*
	333	* a hit
	334	*/
	335	arc_add (parent, child, (unsigned long) 0);
	336	length += vax_operandlength ((struct modebyte *)
	337	(instructp + length));
	338	continue;
	339	}
	340	goto botched;
	341	}
	342	/*
	343	* else:
	344	* it looked like a calls,
	345	* but it wasn't to anywhere.
	346	*/
	347	goto botched;
	348	default:
	349	botched:
	350	/*
	351	* something funny going on.
	352	*/
	353	DBG (CALLDEBUG, printf ("[findcall]\tbut it's a botch\n"));
	354	length = 1;
	355	continue;
	356	}
	357	}
	358	}
	359	}