gprof/vax.c

   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
  20 #ifndef lint
  21 static char sccsid[] = "@(#)vax.c       5.6 (Berkeley) 6/1/90";
  22 #endif /* not lint */
  23
  24 #include        "gprof.h"
  25
  26     /*
  27      *  a namelist entry to be the child of indirect calls
  28      */
  29 nltype  indirectchild = {
  30         "(*)" ,                         /* the name */
  31         (unsigned long) 0 ,             /* the pc entry point */
  32         (unsigned long) 0 ,             /* entry point aligned to histogram */
  33         (double) 0.0 ,                  /* ticks in this routine */
  34         (double) 0.0 ,                  /* cumulative ticks in children */
  35         (long) 0 ,                      /* how many times called */
  36         (long) 0 ,                      /* how many calls to self */
  37         (double) 1.0 ,                  /* propagation fraction */
  38         (double) 0.0 ,                  /* self propagation time */
  39         (double) 0.0 ,                  /* child propagation time */
  40         (bool) 0 ,                      /* print flag */
  41         (int) 0 ,                       /* index in the graph list */
  42         (int) 0 ,                       /* graph call chain top-sort order */
  43         (int) 0 ,                       /* internal number of cycle on */
  44         (struct nl *) &indirectchild ,  /* pointer to head of cycle */
  45         (struct nl *) 0 ,               /* pointer to next member of cycle */
  46         (arctype *) 0 ,                 /* list of caller arcs */
  47         (arctype *) 0                   /* list of callee arcs */
  48     };
  49
  50 operandenum
  51 operandmode( modep )
  52     struct modebyte     *modep;
  53 {
  54     long        usesreg = modep -> regfield;
  55
  56     switch ( modep -> modefield ) {
  57         case 0:
  58         case 1:
  59         case 2:
  60         case 3:
  61             return literal;
  62         case 4:
  63             return indexed;
  64         case 5:
  65             return reg;
  66         case 6:
  67             return regdef;
  68         case 7:
  69             return autodec;
  70         case 8:
  71             return ( usesreg != PC ? autoinc : immediate );
  72         case 9:
  73             return ( usesreg != PC ? autoincdef : absolute );
  74         case 10:
  75             return ( usesreg != PC ? bytedisp : byterel );
  76         case 11:
  77             return ( usesreg != PC ? bytedispdef : bytereldef );
  78         case 12:
  79             return ( usesreg != PC ? worddisp : wordrel );
  80         case 13:
  81             return ( usesreg != PC ? worddispdef : wordreldef );
  82         case 14:
  83             return ( usesreg != PC ? longdisp : longrel );
  84         case 15:
  85             return ( usesreg != PC ? longdispdef : longreldef );
  86     }
  87     /* NOTREACHED */
  88 }
  89
  90 char *
  91 operandname( mode )
  92     operandenum mode;
  93 {
  94
  95     switch ( mode ) {
  96         case literal:
  97             return "literal";
  98         case indexed:
  99             return "indexed";
 100         case reg:
 101             return "register";
 102         case regdef:
 103             return "register deferred";
 104         case autodec:
 105             return "autodecrement";
 106         case autoinc:
 107             return "autoincrement";
 108         case autoincdef:
 109             return "autoincrement deferred";
 110         case bytedisp:
 111             return "byte displacement";
 112         case bytedispdef:
 113             return "byte displacement deferred";
 114         case byterel:
 115             return "byte relative";
 116         case bytereldef:
 117             return "byte relative deferred";
 118         case worddisp:
 119             return "word displacement";
 120         case worddispdef:
 121             return "word displacement deferred";
 122         case wordrel:
 123             return "word relative";
 124         case wordreldef:
 125             return "word relative deferred";
 126         case immediate:
 127             return "immediate";
 128         case absolute:
 129             return "absolute";
 130         case longdisp:
 131             return "long displacement";
 132         case longdispdef:
 133             return "long displacement deferred";
 134         case longrel:
 135             return "long relative";
 136         case longreldef:
 137             return "long relative deferred";
 138     }
 139     /* NOTREACHED */
 140 }
 141
 142 long
 143 operandlength( modep )
 144     struct modebyte     *modep;
 145 {
 146
 147     switch ( operandmode( modep ) ) {
 148         case literal:
 149         case reg:
 150         case regdef:
 151         case autodec:
 152         case autoinc:
 153         case autoincdef:
 154             return 1;
 155         case bytedisp:
 156         case bytedispdef:
 157         case byterel:
 158         case bytereldef:
 159             return 2;
 160         case worddisp:
 161         case worddispdef:
 162         case wordrel:
 163         case wordreldef:
 164             return 3;
 165         case immediate:
 166         case absolute:
 167         case longdisp:
 168         case longdispdef:
 169         case longrel:
 170         case longreldef:
 171             return 5;
 172         case indexed:
 173             return 1+operandlength( (struct modebyte *) ((char *) modep) + 1 );
 174     }
 175     /* NOTREACHED */
 176 }
 177
 178 unsigned long
 179 reladdr( modep )
 180     struct modebyte     *modep;
 181 {
 182     operandenum mode = operandmode( modep );
 183     char        *cp;
 184     short       *sp;
 185     long        *lp;
 186
 187     cp = (char *) modep;
 188     cp += 1;                    /* skip over the mode */
 189     switch ( mode ) {
 190         default:
 191             fprintf( stderr , "[reladdr] not relative address\n" );
 192             return (unsigned long) modep;
 193         case byterel:
 194             return (unsigned long) ( cp + sizeof *cp + *cp );
 195         case wordrel:
 196             sp = (short *) cp;
 197             return (unsigned long) ( cp + sizeof *sp + *sp );
 198         case longrel:
 199             lp = (long *) cp;
 200             return (unsigned long) ( cp + sizeof *lp + *lp );
 201     }
 202 }
 203
 204 findcall( parentp , p_lowpc , p_highpc )
 205     nltype              *parentp;
 206     unsigned long       p_lowpc;
 207     unsigned long       p_highpc;
 208 {
 209     unsigned char       *instructp;
 210     long                length;
 211     nltype              *childp;
 212     operandenum         mode;
 213     operandenum         firstmode;
 214     unsigned long       destpc;
 215
 216     if ( textspace == 0 ) {
 217         return;
 218     }
 219     if ( p_lowpc < s_lowpc ) {
 220         p_lowpc = s_lowpc;
 221     }
 222     if ( p_highpc > s_highpc ) {
 223         p_highpc = s_highpc;
 224     }
 225 #   ifdef DEBUG
 226         if ( debug & CALLDEBUG ) {
 227             printf( "[findcall] %s: 0x%x to 0x%x\n" ,
 228                     parentp -> name , p_lowpc , p_highpc );
 229         }
 230 #   endif DEBUG
 231     for (   instructp = textspace + p_lowpc ;
 232             instructp < textspace + p_highpc ;
 233             instructp += length ) {
 234         length = 1;
 235         if ( *instructp == CALLS ) {
 236                 /*
 237                  *      maybe a calls, better check it out.
 238                  *      skip the count of the number of arguments.
 239                  */
 240 #           ifdef DEBUG
 241                 if ( debug & CALLDEBUG ) {
 242                     printf( "[findcall]\t0x%x:calls" , instructp - textspace );
 243                 }
 244 #           endif DEBUG
 245             firstmode = operandmode( (struct modebyte *) (instructp+length) );
 246             switch ( firstmode ) {
 247                 case literal:
 248                 case immediate:
 249                     break;
 250                 default:
 251                     goto botched;
 252             }
 253             length += operandlength( (struct modebyte *) (instructp+length) );
 254             mode = operandmode( (struct modebyte *) ( instructp + length ) );
 255 #           ifdef DEBUG
 256                 if ( debug & CALLDEBUG ) {
 257                     printf( "\tfirst operand is %s", operandname( firstmode ) );
 258                     printf( "\tsecond operand is %s\n" , operandname( mode ) );
 259                 }
 260 #           endif DEBUG
 261             switch ( mode ) {
 262                 case regdef:
 263                 case bytedispdef:
 264                 case worddispdef:
 265                 case longdispdef:
 266                 case bytereldef:
 267                 case wordreldef:
 268                 case longreldef:
 269                         /*
 270                          *      indirect call: call through pointer
 271                          *      either  *d(r)   as a parameter or local
 272                          *              (r)     as a return value
 273                          *              *f      as a global pointer
 274                          *      [are there others that we miss?,
 275                          *       e.g. arrays of pointers to functions???]
 276                          */
 277                     addarc( parentp , &indirectchild , (long) 0 );
 278                     length += operandlength(
 279                                 (struct modebyte *) ( instructp + length ) );
 280                     continue;
 281                 case byterel:
 282                 case wordrel:
 283                 case longrel:
 284                         /*
 285                          *      regular pc relative addressing
 286                          *      check that this is the address of
 287                          *      a function.
 288                          */
 289                     destpc = reladdr( (struct modebyte *) (instructp+length) )
 290                                 - (unsigned long) textspace;
 291                     if ( destpc >= s_lowpc && destpc <= s_highpc ) {
 292                         childp = nllookup( destpc );
 293 #                       ifdef DEBUG
 294                             if ( debug & CALLDEBUG ) {
 295                                 printf( "[findcall]\tdestpc 0x%x" , destpc );
 296                                 printf( " childp->name %s" , childp -> name );
 297                                 printf( " childp->value 0x%x\n" ,
 298                                         childp -> value );
 299                             }
 300 #                       endif DEBUG
 301                         if ( childp -> value == destpc ) {
 302                                 /*
 303                                  *      a hit
 304                                  */
 305                             addarc( parentp , childp , (long) 0 );
 306                             length += operandlength( (struct modebyte *)
 307                                             ( instructp + length ) );
 308                             continue;
 309                         }
 310                         goto botched;
 311                     }
 312                         /*
 313                          *      else:
 314                          *      it looked like a calls,
 315                          *      but it wasn't to anywhere.
 316                          */
 317                     goto botched;
 318                 default:
 319                 botched:
 320                         /*
 321                          *      something funny going on.
 322                          */
 323 #                   ifdef DEBUG
 324                         if ( debug & CALLDEBUG ) {
 325                             printf( "[findcall]\tbut it's a botch\n" );
 326                         }
 327 #                   endif DEBUG
 328                     length = 1;
 329                     continue;
 330             }
 331         }
 332     }
 333 }