[deliverable/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, (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 RH	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	*/
	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	*/
	53	Sym indirectchild;
	54
	55
	56	static operandenum
	57	vax_operandmode (modep)
	58	struct modebyte *modep;
	59	{
	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;
93	}
94	/* NOTREACHED */
95	abort ();
96	}
97
98	static char *
99	vax_operandname (mode)
100	operandenum mode;
101	{
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";
147	}
148	/* NOTREACHED */
149	abort ();
150	}
151
152	static long
153	vax_operandlength (modep)
154	struct modebyte *modep;
155	{
156
157	switch (vax_operandmode (modep))
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:
184	return 1 + vax_operandlength ((struct modebyte ) ((char ) modep) + 1);
185	}
186	/* NOTREACHED */
187	abort ();
188	}
189
190	static bfd_vma
191	vax_reladdr (modep)
192	struct modebyte *modep;
193	{
194	operandenum mode = vax_operandmode (modep);
195	char *cp;
196	short *sp;
197	long *lp;
198
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);
214	}
215	}
216
217
218	void
219	vax_find_call (parent, p_lowpc, p_highpc)
220	Sym *parent;
221	bfd_vma p_lowpc;
222	bfd_vma p_highpc;
223	{
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;
231
232	if (!inited)
233	{
234	inited = TRUE;
235	sym_init (&indirectchild);
236	indirectchild.cg.prop.fract = 1.0;
237	indirectchild.cg.cyc.head = &indirectchild;
238	}
239
240	if (core_text_space == 0)
241	{
242	return;
243	}
244	if (p_lowpc < s_lowpc)
245	{
246	p_lowpc = s_lowpc;
247	}
248	if (p_highpc > s_highpc)
249	{
250	p_highpc = s_highpc;
251	}
252	DBG (CALLDEBUG, printf ("[findcall] %s: 0x%lx to 0x%lx\n",
fdcf7d43 ILT	253	parent->name, (unsigned long) p_lowpc,
fdcf7d43 ILT	254	(unsigned long) p_highpc));
252b5132 RH	255	for (instructp = (unsigned char *) core_text_space + p_lowpc;
	256	instructp < (unsigned char *) core_text_space + p_highpc;
	257	instructp += length)
	258	{
	259	length = 1;
	260	if (*instructp == CALLS)
	261	{
	262	/*
	263	* maybe a calls, better check it out.
	264	* skip the count of the number of arguments.
	265	*/
	266	DBG (CALLDEBUG,
0e69fcbc ILT	267	printf ("[findcall]\t0x%lx:calls",
	268	((unsigned long)
	269	(instructp - (unsigned char *) core_text_space))));
252b5132 RH	270	firstmode = vax_operandmode ((struct modebyte *) (instructp + length));
	271	switch (firstmode)
	272	{
	273	case literal:
	274	case immediate:
	275	break;
	276	default:
	277	goto botched;
	278	}
	279	length += vax_operandlength ((struct modebyte *) (instructp + length));
	280	mode = vax_operandmode ((struct modebyte *) (instructp + length));
	281	DBG (CALLDEBUG,
	282	printf ("\tfirst operand is %s", vax_operandname (firstmode));
	283	printf ("\tsecond operand is %s\n", vax_operandname (mode)));
	284	switch (mode)
	285	{
	286	case regdef:
	287	case bytedispdef:
	288	case worddispdef:
	289	case longdispdef:
	290	case bytereldef:
	291	case wordreldef:
	292	case longreldef:
	293	/*
	294	* indirect call: call through pointer
	295	* either *d(r) as a parameter or local
	296	* (r) as a return value
	297	* *f as a global pointer
	298	* [are there others that we miss?,
	299	* e.g. arrays of pointers to functions???]
	300	*/
	301	arc_add (parent, &indirectchild, (unsigned long) 0);
	302	length += vax_operandlength (
	303	(struct modebyte *) (instructp + length));
	304	continue;
	305	case byterel:
	306	case wordrel:
	307	case longrel:
	308	/*
	309	* regular pc relative addressing
	310	* check that this is the address of
	311	* a function.
	312	*/
	313	destpc = vax_reladdr ((struct modebyte *) (instructp + length))
	314	- (bfd_vma) core_text_space;
	315	if (destpc >= s_lowpc && destpc <= s_highpc)
	316	{
	317	child = sym_lookup (&symtab, destpc);
	318	DBG (CALLDEBUG,
fdcf7d43 ILT	319	printf ("[findcall]\tdestpc 0x%lx",
fdcf7d43 ILT	320	(unsigned long) destpc);
252b5132	321	printf (" child->name %s", child->name);
fdcf7d43 ILT	322	printf (" child->addr 0x%lx\n",
fdcf7d43 ILT	323	(unsigned long) child->addr);
252b5132 RH	324	);
	325	if (child->addr == destpc)
	326	{
	327	/*
	328	* a hit
	329	*/
	330	arc_add (parent, child, (unsigned long) 0);
	331	length += vax_operandlength ((struct modebyte *)
	332	(instructp + length));
	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	}