[deliverable/binutils-gdb.git] / gprof / tahoe.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 `callf' instruction
     */
#define	CALLF	0xfe

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

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

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

static tahoe_operandenum tahoe_operandmode (unsigned char *);
static char *tahoe_operandname (tahoe_operandenum);
static long tahoe_operandlength (unsigned char *);
static bfd_signed_vma tahoe_offset (unsigned char *);
void tahoe_find_call (Sym *, bfd_vma, bfd_vma);

static tahoe_operandenum
tahoe_operandmode (unsigned char *modep)
{
  long 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 != 0xe ? 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 *
tahoe_operandname (tahoe_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
tahoe_operandlength (unsigned char *modep
)
{

  switch (tahoe_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 + tahoe_operandlength (modep + 1);
    }
  /* NOTREACHED */
  abort ();
}

static bfd_signed_vma
tahoe_offset (unsigned char *modep)
{
  tahoe_operandenum mode = tahoe_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
tahoe_find_call (Sym *parent, bfd_vma p_lowpc, bfd_vma p_highpc)
{
  unsigned char *instructp;
  long length;
  Sym *child;
  tahoe_operandenum mode;
  tahoe_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) == CALLF)
	{
	  /*
	   *    maybe a callf, better check it out.
	   *      skip the count of the number of arguments.
	   */
	  DBG (CALLDEBUG, printf ("[findcall]\t0x%lx:callf",
				  (unsigned long) pc));
	  firstmode = tahoe_operandmode (instructp + length);
	  switch (firstmode)
	    {
	    case literal:
	    case immediate:
	      break;
	    default:
	      goto botched;
	    }
	  length += tahoe_operandlength (instructp + length);
	  mode = tahoe_operandmode (instructp + length);
	  DBG (CALLDEBUG,
	       printf ("\tfirst operand is %s", tahoe_operandname (firstmode));
	       printf ("\tsecond operand is %s\n", tahoe_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 += tahoe_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 + tahoe_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 += tahoe_operandlength (instructp + length);
		          continue;
		        }
		    }
		  goto botched;
		}
	      /*
	       *    else:
	       *      it looked like a callf,
	       *      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 `callf' instruction
	39	*/
	40	#define CALLF 0xfe
	41
	42	/*
	43	* register for pc relative addressing
	44	*/
	45	#define PC 0xf
	46
	47	enum tahoe_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 tahoe_opermodes tahoe_operandenum;
	55
	56	/*
	57	* A symbol to be the child of indirect callf:
	58	*/
3b04e729	59	static Sym indirectchild;
252b5132	60
3e8f6abf BE	61	static tahoe_operandenum tahoe_operandmode (unsigned char *);
	62	static char *tahoe_operandname (tahoe_operandenum);
	63	static long tahoe_operandlength (unsigned char *);
	64	static bfd_signed_vma tahoe_offset (unsigned char *);
	65	void tahoe_find_call (Sym *, bfd_vma, bfd_vma);
252b5132	66
3b04e729	67	static tahoe_operandenum
3e8f6abf	68	tahoe_operandmode (unsigned char *modep)
252b5132	69	{
6d9c411a	70	long usesreg = *modep & 0xf;
252b5132	71
6d9c411a	72	switch ((*modep >> 4) & 0xf)
252b5132 RH	73	{
	74	case 0:
	75	case 1:
	76	case 2:
	77	case 3:
	78	return literal;
	79	case 4:
	80	return indexed;
	81	case 5:
	82	return reg;
	83	case 6:
	84	return regdef;
	85	case 7:
	86	return autodec;
	87	case 8:
	88	return usesreg != 0xe ? autoinc : immediate;
	89	case 9:
	90	return usesreg != PC ? autoincdef : absolute;
	91	case 10:
	92	return usesreg != PC ? bytedisp : byterel;
	93	case 11:
	94	return usesreg != PC ? bytedispdef : bytereldef;
	95	case 12:
	96	return usesreg != PC ? worddisp : wordrel;
	97	case 13:
	98	return usesreg != PC ? worddispdef : wordreldef;
	99	case 14:
	100	return usesreg != PC ? longdisp : longrel;
	101	case 15:
	102	return usesreg != PC ? longdispdef : longreldef;
	103	}
	104	/* NOTREACHED */
	105	abort ();
	106	}
	107
3b04e729	108	static char *
3e8f6abf	109	tahoe_operandname (tahoe_operandenum mode)
252b5132 RH	110	{
	111
	112	switch (mode)
	113	{
	114	case literal:
	115	return "literal";
	116	case indexed:
	117	return "indexed";
	118	case reg:
	119	return "register";
	120	case regdef:
	121	return "register deferred";
	122	case autodec:
	123	return "autodecrement";
	124	case autoinc:
	125	return "autoincrement";
	126	case autoincdef:
	127	return "autoincrement deferred";
	128	case bytedisp:
	129	return "byte displacement";
	130	case bytedispdef:
	131	return "byte displacement deferred";
	132	case byterel:
	133	return "byte relative";
	134	case bytereldef:
	135	return "byte relative deferred";
	136	case worddisp:
	137	return "word displacement";
	138	case worddispdef:
	139	return "word displacement deferred";
	140	case wordrel:
	141	return "word relative";
	142	case wordreldef:
	143	return "word relative deferred";
	144	case immediate:
	145	return "immediate";
	146	case absolute:
	147	return "absolute";
	148	case longdisp:
	149	return "long displacement";
	150	case longdispdef:
	151	return "long displacement deferred";
	152	case longrel:
	153	return "long relative";
	154	case longreldef:
	155	return "long relative deferred";
	156	}
	157	/* NOTREACHED */
	158	abort ();
	159	}
	160
3b04e729	161	static long
3e8f6abf BE	162	tahoe_operandlength (unsigned char *modep
3e8f6abf BE	163	)
252b5132 RH	164	{
	165
	166	switch (tahoe_operandmode (modep))
	167	{
	168	case literal:
	169	case reg:
	170	case regdef:
	171	case autodec:
	172	case autoinc:
	173	case autoincdef:
	174	return 1;
	175	case bytedisp:
	176	case bytedispdef:
	177	case byterel:
	178	case bytereldef:
	179	return 2;
	180	case worddisp:
	181	case worddispdef:
	182	case wordrel:
	183	case wordreldef:
	184	return 3;
	185	case immediate:
	186	case absolute:
	187	case longdisp:
	188	case longdispdef:
	189	case longrel:
	190	case longreldef:
	191	return 5;
	192	case indexed:
	193	return 1 + tahoe_operandlength (modep + 1);
	194	}
	195	/* NOTREACHED */
	196	abort ();
	197	}
	198
6d9c411a	199	static bfd_signed_vma
3e8f6abf	200	tahoe_offset (unsigned char *modep)
252b5132 RH	201	{
252b5132 RH	202	tahoe_operandenum mode = tahoe_operandmode (modep);
252b5132	203
6d9c411a	204	++modep; /* skip over the mode */
252b5132 RH	205	switch (mode)
	206	{
	207	default:
	208	fprintf (stderr, "[reladdr] not relative address\n");
6d9c411a	209	return 0;
252b5132	210	case byterel:
6d9c411a	211	return 1 + bfd_get_signed_8 (core_bfd, modep);
252b5132	212	case wordrel:
6d9c411a	213	return 2 + bfd_get_signed_16 (core_bfd, modep);
252b5132	214	case longrel:
6d9c411a	215	return 4 + bfd_get_signed_32 (core_bfd, modep);
252b5132 RH	216	}
	217	}
	218
	219	void
3e8f6abf	220	tahoe_find_call (Sym *parent, bfd_vma p_lowpc, bfd_vma p_highpc)
252b5132 RH	221	{
	222	unsigned char *instructp;
	223	long length;
	224	Sym *child;
	225	tahoe_operandenum mode;
	226	tahoe_operandenum firstmode;
6d9c411a	227	bfd_vma pc, destpc;
b34976b6	228	static bfd_boolean inited = FALSE;
252b5132 RH	229
	230	if (!inited)
	231	{
b34976b6	232	inited = TRUE;
252b5132 RH	233	sym_init (&indirectchild);
	234	indirectchild.cg.prop.fract = 1.0;
	235	indirectchild.cg.cyc.head = &indirectchild;
	236	}
	237
252b5132	238	DBG (CALLDEBUG, printf ("[findcall] %s: 0x%lx to 0x%lx\n",
fdcf7d43 ILT	239	parent->name, (unsigned long) p_lowpc,
fdcf7d43 ILT	240	(unsigned long) p_highpc));
6d9c411a	241	for (pc = p_lowpc; pc < p_highpc; pc += length)
252b5132 RH	242	{
252b5132 RH	243	length = 1;
6d9c411a AM	244	instructp = ((unsigned char *) core_text_space
	245	+ pc - core_text_sect->vma);
	246	if ((*instructp & 0xff) == CALLF)
252b5132 RH	247	{
	248	/*
	249	* maybe a callf, better check it out.
	250	* skip the count of the number of arguments.
	251	*/
0e69fcbc	252	DBG (CALLDEBUG, printf ("[findcall]\t0x%lx:callf",
6d9c411a	253	(unsigned long) pc));
252b5132 RH	254	firstmode = tahoe_operandmode (instructp + length);
	255	switch (firstmode)
	256	{
	257	case literal:
	258	case immediate:
	259	break;
	260	default:
	261	goto botched;
	262	}
	263	length += tahoe_operandlength (instructp + length);
	264	mode = tahoe_operandmode (instructp + length);
	265	DBG (CALLDEBUG,
	266	printf ("\tfirst operand is %s", tahoe_operandname (firstmode));
	267	printf ("\tsecond operand is %s\n", tahoe_operandname (mode));
	268	);
	269	switch (mode)
	270	{
	271	case regdef:
	272	case bytedispdef:
	273	case worddispdef:
	274	case longdispdef:
	275	case bytereldef:
	276	case wordreldef:
	277	case longreldef:
	278	/*
	279	* indirect call: call through pointer
	280	* either *d(r) as a parameter or local
	281	* (r) as a return value
	282	* *f as a global pointer
	283	* [are there others that we miss?,
	284	* e.g. arrays of pointers to functions???]
	285	*/
	286	arc_add (parent, &indirectchild, (unsigned long) 0);
	287	length += tahoe_operandlength (instructp + length);
	288	continue;
	289	case byterel:
	290	case wordrel:
	291	case longrel:
	292	/*
	293	* regular pc relative addressing
0eee5820	294	* check that this is the address of
252b5132 RH	295	* a function.
252b5132 RH	296	*/
6d9c411a	297	destpc = pc + tahoe_offset (instructp + length);
b3296dc5	298	if (hist_check_address (destpc))
252b5132 RH	299	{
252b5132 RH	300	child = sym_lookup (&symtab, destpc);
d401d98a	301	if (child)
252b5132	302	{
d401d98a AM	303	DBG (CALLDEBUG,
	304	printf ("[findcall]\tdestpc 0x%lx",
	305	(unsigned long) destpc);
	306	printf (" child->name %s", child->name);
	307	printf (" child->addr 0x%lx\n",
	308	(unsigned long) child->addr);
	309	);
	310	if (child->addr == destpc)
	311	{
	312	/*
	313	* a hit
	314	*/
	315	arc_add (parent, child, (unsigned long) 0);
	316	length += tahoe_operandlength (instructp + length);
	317	continue;
	318	}
252b5132 RH	319	}
	320	goto botched;
	321	}
	322	/*
	323	* else:
	324	* it looked like a callf,
	325	* but it wasn't to anywhere.
	326	*/
	327	goto botched;
	328	default:
	329	botched:
	330	/*
	331	* something funny going on.
	332	*/
	333	DBG (CALLDEBUG, printf ("[findcall]\tbut it's a botch\n"));
	334	length = 1;
	335	continue;
	336	}
	337	}
	338	}
	339	}