gdb/f-lang.c

   1 /* Fortran language support routines for GDB, the GNU debugger.
   2    Copyright 1993, 1994 Free Software Foundation, Inc.
   3    Contributed by Motorola.  Adapted from the C parser by Farooq Butt
   4    (fmbutt@engage.sps.mot.com).
   5
   6 This file is part of GDB.
   7
   8 This program is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 2 of the License, or
  11 (at your option) any later version.
  12
  13 This program is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with this program; if not, write to the Free Software
  20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  21
  22 #include "defs.h"
  23 #include "symtab.h"
  24 #include "gdbtypes.h"
  25 #include "expression.h"
  26 #include "parser-defs.h"
  27 #include "language.h"
  28 #include "f-lang.h"
  29
  30 /* Print the character C on STREAM as part of the contents of a literal
  31    string whose delimiter is QUOTER.  Note that that format for printing
  32    characters and strings is language specific.
  33    FIXME:  This is a copy of the same function from c-exp.y.  It should
  34    be replaced with a true F77 version.  */
  35
  36 static void
  37 emit_char (c, stream, quoter)
  38      register int c;
  39      FILE *stream;
  40      int quoter;
  41 {
  42   c &= 0xFF;                    /* Avoid sign bit follies */
  43
  44   if (PRINT_LITERAL_FORM (c))
  45     {
  46       if (c == '\\' || c == quoter)
  47         fputs_filtered ("\\", stream);
  48       fprintf_filtered (stream, "%c", c);
  49     }
  50   else
  51     {
  52       switch (c)
  53         {
  54         case '\n':
  55           fputs_filtered ("\\n", stream);
  56           break;
  57         case '\b':
  58           fputs_filtered ("\\b", stream);
  59           break;
  60         case '\t':
  61           fputs_filtered ("\\t", stream);
  62           break;
  63         case '\f':
  64           fputs_filtered ("\\f", stream);
  65           break;
  66         case '\r':
  67           fputs_filtered ("\\r", stream);
  68           break;
  69         case '\033':
  70           fputs_filtered ("\\e", stream);
  71           break;
  72         case '\007':
  73           fputs_filtered ("\\a", stream);
  74           break;
  75         default:
  76           fprintf_filtered (stream, "\\%.3o", (unsigned int) c);
  77           break;
  78         }
  79     }
  80 }
  81
  82 /* FIXME:  This is a copy of the same function from c-exp.y.  It should
  83    be replaced with a true F77version. */
  84
  85 static void
  86 f_printchar (c, stream)
  87      int c;
  88      FILE *stream;
  89 {
  90   fputs_filtered ("'", stream);
  91   emit_char (c, stream, '\'');
  92   fputs_filtered ("'", stream);
  93 }
  94
  95 /* Print the character string STRING, printing at most LENGTH characters.
  96    Printing stops early if the number hits print_max; repeat counts
  97    are printed as appropriate.  Print ellipses at the end if we
  98    had to stop before printing LENGTH characters, or if FORCE_ELLIPSES.
  99    FIXME:  This is a copy of the same function from c-exp.y.  It should
 100    be replaced with a true F77 version. */
 101
 102 static void
 103 f_printstr (stream, string, length, force_ellipses)
 104      FILE *stream;
 105      char *string;
 106      unsigned int length;
 107      int force_ellipses;
 108 {
 109   register unsigned int i;
 110   unsigned int things_printed = 0;
 111   int in_quotes = 0;
 112   int need_comma = 0;
 113   extern int inspect_it;
 114   extern int repeat_count_threshold;
 115   extern int print_max;
 116
 117   if (length == 0)
 118     {
 119       fputs_filtered ("''", stdout);
 120       return;
 121     }
 122
 123   for (i = 0; i < length && things_printed < print_max; ++i)
 124     {
 125       /* Position of the character we are examining
 126          to see whether it is repeated.  */
 127       unsigned int rep1;
 128       /* Number of repetitions we have detected so far.  */
 129       unsigned int reps;
 130
 131       QUIT;
 132
 133       if (need_comma)
 134         {
 135           fputs_filtered (", ", stream);
 136           need_comma = 0;
 137         }
 138
 139       rep1 = i + 1;
 140       reps = 1;
 141       while (rep1 < length && string[rep1] == string[i])
 142         {
 143           ++rep1;
 144           ++reps;
 145         }
 146
 147       if (reps > repeat_count_threshold)
 148         {
 149           if (in_quotes)
 150             {
 151               if (inspect_it)
 152                 fputs_filtered ("\\', ", stream);
 153               else
 154                 fputs_filtered ("', ", stream);
 155               in_quotes = 0;
 156             }
 157           f_printchar (string[i], stream);
 158           fprintf_filtered (stream, " <repeats %u times>", reps);
 159           i = rep1 - 1;
 160           things_printed += repeat_count_threshold;
 161           need_comma = 1;
 162         }
 163       else
 164         {
 165           if (!in_quotes)
 166             {
 167               if (inspect_it)
 168                 fputs_filtered ("\\'", stream);
 169               else
 170                 fputs_filtered ("'", stream);
 171               in_quotes = 1;
 172             }
 173           emit_char (string[i], stream, '"');
 174           ++things_printed;
 175         }
 176     }
 177
 178   /* Terminate the quotes if necessary.  */
 179   if (in_quotes)
 180     {
 181       if (inspect_it)
 182         fputs_filtered ("\\'", stream);
 183       else
 184         fputs_filtered ("'", stream);
 185     }
 186
 187   if (force_ellipses || i < length)
 188     fputs_filtered ("...", stream);
 189 }
 190
 191 /* FIXME:  This is a copy of c_create_fundamental_type(), before
 192    all the non-C types were stripped from it.  Needs to be fixed
 193    by an experienced F77 programmer. */
 194
 195 static struct type *
 196 f_create_fundamental_type (objfile, typeid)
 197      struct objfile *objfile;
 198      int typeid;
 199 {
 200   register struct type *type = NULL;
 201
 202   switch (typeid)
 203     {
 204     case FT_VOID:
 205       type = init_type (TYPE_CODE_VOID,
 206                         TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 207                         0, "VOID", objfile);
 208       break;
 209     case FT_BOOLEAN:
 210       type = init_type (TYPE_CODE_BOOL,
 211                         TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 212                         TYPE_FLAG_UNSIGNED, "boolean", objfile);
 213       break;
 214     case FT_STRING:
 215       type = init_type (TYPE_CODE_STRING,
 216                         TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 217                         0, "string", objfile);
 218       break;
 219     case FT_CHAR:
 220       type = init_type (TYPE_CODE_INT,
 221                         TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 222                         0, "character", objfile);
 223       break;
 224     case FT_SIGNED_CHAR:
 225       type = init_type (TYPE_CODE_INT,
 226                         TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 227                         0, "integer*1", objfile);
 228       break;
 229     case FT_UNSIGNED_CHAR:
 230       type = init_type (TYPE_CODE_BOOL,
 231                         TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 232                         TYPE_FLAG_UNSIGNED, "logical*1", objfile);
 233       break;
 234     case FT_SHORT:
 235       type = init_type (TYPE_CODE_INT,
 236                         TARGET_SHORT_BIT / TARGET_CHAR_BIT,
 237                         0, "integer*2", objfile);
 238       break;
 239     case FT_SIGNED_SHORT:
 240       type = init_type (TYPE_CODE_INT,
 241                         TARGET_SHORT_BIT / TARGET_CHAR_BIT,
 242                         0, "short", objfile);   /* FIXME-fnf */
 243       break;
 244     case FT_UNSIGNED_SHORT:
 245       type = init_type (TYPE_CODE_BOOL,
 246                         TARGET_SHORT_BIT / TARGET_CHAR_BIT,
 247                         TYPE_FLAG_UNSIGNED, "logical*2", objfile);
 248       break;
 249     case FT_INTEGER:
 250       type = init_type (TYPE_CODE_INT,
 251                         TARGET_INT_BIT / TARGET_CHAR_BIT,
 252                         0, "integer*4", objfile);
 253       break;
 254     case FT_SIGNED_INTEGER:
 255       type = init_type (TYPE_CODE_INT,
 256                         TARGET_INT_BIT / TARGET_CHAR_BIT,
 257                         0, "integer", objfile); /* FIXME -fnf */
 258       break;
 259     case FT_UNSIGNED_INTEGER:
 260       type = init_type (TYPE_CODE_BOOL,
 261                         TARGET_INT_BIT / TARGET_CHAR_BIT,
 262                         TYPE_FLAG_UNSIGNED, "logical*4", objfile);
 263       break;
 264     case FT_FIXED_DECIMAL:
 265       type = init_type (TYPE_CODE_INT,
 266                         TARGET_INT_BIT / TARGET_CHAR_BIT,
 267                         0, "fixed decimal", objfile);
 268       break;
 269     case FT_LONG:
 270       type = init_type (TYPE_CODE_INT,
 271                         TARGET_LONG_BIT / TARGET_CHAR_BIT,
 272                         0, "long", objfile);
 273       break;
 274     case FT_SIGNED_LONG:
 275       type = init_type (TYPE_CODE_INT,
 276                         TARGET_LONG_BIT / TARGET_CHAR_BIT,
 277                         0, "long", objfile); /* FIXME -fnf */
 278       break;
 279     case FT_UNSIGNED_LONG:
 280       type = init_type (TYPE_CODE_INT,
 281                         TARGET_LONG_BIT / TARGET_CHAR_BIT,
 282                         TYPE_FLAG_UNSIGNED, "unsigned long", objfile);
 283       break;
 284     case FT_LONG_LONG:
 285       type = init_type (TYPE_CODE_INT,
 286                         TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
 287                         0, "long long", objfile);
 288       break;
 289     case FT_SIGNED_LONG_LONG:
 290       type = init_type (TYPE_CODE_INT,
 291                         TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
 292                         0, "signed long long", objfile);
 293       break;
 294     case FT_UNSIGNED_LONG_LONG:
 295       type = init_type (TYPE_CODE_INT,
 296                         TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
 297                         TYPE_FLAG_UNSIGNED, "unsigned long long", objfile);
 298       break;
 299     case FT_FLOAT:
 300       type = init_type (TYPE_CODE_FLT,
 301                         TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
 302                         0, "real", objfile);
 303       break;
 304     case FT_DBL_PREC_FLOAT:
 305       type = init_type (TYPE_CODE_FLT,
 306                         TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
 307                         0, "real*8", objfile);
 308       break;
 309     case FT_FLOAT_DECIMAL:
 310       type = init_type (TYPE_CODE_FLT,
 311                         TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
 312                         0, "floating decimal", objfile);
 313       break;
 314     case FT_EXT_PREC_FLOAT:
 315       type = init_type (TYPE_CODE_FLT,
 316                         TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
 317                         0, "real*16", objfile);
 318       break;
 319     case FT_COMPLEX:
 320       type = init_type (TYPE_CODE_FLT,
 321                         TARGET_COMPLEX_BIT / TARGET_CHAR_BIT,
 322                         0, "complex*8", objfile);
 323       break;
 324     case FT_DBL_PREC_COMPLEX:
 325       type = init_type (TYPE_CODE_FLT,
 326                         TARGET_DOUBLE_COMPLEX_BIT / TARGET_CHAR_BIT,
 327                         0, "complex*16", objfile);
 328       break;
 329     case FT_EXT_PREC_COMPLEX:
 330       type = init_type (TYPE_CODE_FLT,
 331                         TARGET_DOUBLE_COMPLEX_BIT / TARGET_CHAR_BIT,
 332                         0, "complex*32", objfile);
 333       break;
 334     default:
 335       /* FIXME:  For now, if we are asked to produce a type not in this
 336          language, create the equivalent of a C integer type with the
 337          name "<?type?>".  When all the dust settles from the type
 338          reconstruction work, this should probably become an error. */
 339       type = init_type (TYPE_CODE_INT,
 340                         TARGET_INT_BIT / TARGET_CHAR_BIT,
 341                         0, "<?type?>", objfile);
 342       warning ("internal error: no F77 fundamental type %d", typeid);
 343       break;
 344     }
 345   return (type);
 346 }
 347
 348 \f
 349 /* Table of operators and their precedences for printing expressions.  */
 350
 351 static const struct op_print f_op_print_tab[] = {
 352   { "+",     BINOP_ADD, PREC_ADD, 0 },
 353   { "+",     UNOP_PLUS, PREC_PREFIX, 0 },
 354   { "-",     BINOP_SUB, PREC_ADD, 0 },
 355   { "-",     UNOP_NEG, PREC_PREFIX, 0 },
 356   { "*",     BINOP_MUL, PREC_MUL, 0 },
 357   { "/",     BINOP_DIV, PREC_MUL, 0 },
 358   { "DIV",   BINOP_INTDIV, PREC_MUL, 0 },
 359   { "MOD",   BINOP_REM, PREC_MUL, 0 },
 360   { "=",     BINOP_ASSIGN, PREC_ASSIGN, 1 },
 361   { ".OR.",  BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0 },
 362   { ".AND.", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0 },
 363   { ".NOT.", UNOP_LOGICAL_NOT, PREC_PREFIX, 0 },
 364   { ".EQ.",  BINOP_EQUAL, PREC_EQUAL, 0 },
 365   { ".NE.",  BINOP_NOTEQUAL, PREC_EQUAL, 0 },
 366   { ".LE.",  BINOP_LEQ, PREC_ORDER, 0 },
 367   { ".GE.",  BINOP_GEQ, PREC_ORDER, 0 },
 368   { ".GT.",  BINOP_GTR, PREC_ORDER, 0 },
 369   { ".LT.",  BINOP_LESS, PREC_ORDER, 0 },
 370   { "**",    UNOP_IND, PREC_PREFIX, 0 },
 371   { "@",     BINOP_REPEAT, PREC_REPEAT, 0 },
 372   { NULL,    0, 0, 0 }
 373 };
 374 \f
 375 /* The built-in types of F77.  */
 376
 377 struct type *builtin_type_f_character;
 378 struct type *builtin_type_f_integer;
 379 struct type *builtin_type_f_logical;
 380 struct type *builtin_type_f_logical_s1;
 381 struct type *builtin_type_f_logical_s2;
 382 struct type *builtin_type_f_integer;
 383 struct type *builtin_type_f_integer_s2;
 384 struct type *builtin_type_f_real;
 385 struct type *builtin_type_f_real_s8;
 386 struct type *builtin_type_f_real_s16;
 387 struct type *builtin_type_f_complex_s8;
 388 struct type *builtin_type_f_complex_s16;
 389 struct type *builtin_type_f_complex_s32;
 390 struct type *builtin_type_f_void;
 391
 392 struct type ** const (f_builtin_types[]) =
 393 {
 394   &builtin_type_f_character,
 395   &builtin_type_f_integer,
 396   &builtin_type_f_logical,
 397   &builtin_type_f_logical_s1,
 398   &builtin_type_f_logical_s2,
 399   &builtin_type_f_integer,
 400   &builtin_type_f_integer_s2,
 401   &builtin_type_f_real,
 402   &builtin_type_f_real_s8,
 403   &builtin_type_f_real_s16,
 404   &builtin_type_f_complex_s8,
 405   &builtin_type_f_complex_s16,
 406 #if 0
 407   &builtin_type_f_complex_s32,
 408 #endif
 409   &builtin_type_f_void,
 410   0
 411 };
 412
 413 int c_value_print();
 414
 415 const struct language_defn f_language_defn = {
 416   "fortran",
 417   language_fortran,
 418   f_builtin_types,
 419   range_check_on,
 420   type_check_on,
 421   f_parse,                      /* parser */
 422   f_error,                      /* parser error function */
 423   f_printchar,                  /* Print character constant */
 424   f_printstr,                   /* function to print string constant */
 425   f_create_fundamental_type,    /* Create fundamental type in this language */
 426   f_print_type,                 /* Print a type using appropriate syntax */
 427   f_val_print,                  /* Print a value using appropriate syntax */
 428   c_value_print,  /* FIXME */
 429   {"",      "",   "",   ""},    /* Binary format info */
 430   {"0%o",  "0",   "o", ""},     /* Octal format info */
 431   {"%d",   "",    "d", ""},     /* Decimal format info */
 432   {"0x%x", "0x",  "x", ""},     /* Hex format info */
 433   f_op_print_tab,               /* expression operators for printing */
 434   LANG_MAGIC
 435   };
 436
 437 void
 438 _initialize_f_language ()
 439 {
 440   builtin_type_f_void =
 441     init_type (TYPE_CODE_VOID, 1,
 442                0,
 443                "VOID", (struct objfile *) NULL);
 444
 445   builtin_type_f_character =
 446     init_type (TYPE_CODE_INT, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 447                0,
 448                "character", (struct objfile *) NULL);
 449
 450   builtin_type_f_logical_s1 =
 451     init_type (TYPE_CODE_BOOL, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 452                TYPE_FLAG_UNSIGNED,
 453                "logical*1", (struct objfile *) NULL);
 454
 455   builtin_type_f_integer_s2 =
 456     init_type (TYPE_CODE_INT, TARGET_SHORT_BIT / TARGET_CHAR_BIT,
 457                0,
 458                "integer*2", (struct objfile *) NULL);
 459
 460   builtin_type_f_logical_s2 =
 461     init_type (TYPE_CODE_BOOL, TARGET_SHORT_BIT / TARGET_CHAR_BIT,
 462                TYPE_FLAG_UNSIGNED,
 463                "logical*2", (struct objfile *) NULL);
 464
 465   builtin_type_f_integer =
 466     init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT,
 467                0,
 468                "integer", (struct objfile *) NULL);
 469
 470   builtin_type_f_logical =
 471     init_type (TYPE_CODE_BOOL, TARGET_INT_BIT / TARGET_CHAR_BIT,
 472                TYPE_FLAG_UNSIGNED,
 473                "logical*4", (struct objfile *) NULL);
 474
 475   builtin_type_f_real =
 476     init_type (TYPE_CODE_FLT, TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
 477                0,
 478                "real", (struct objfile *) NULL);
 479
 480   builtin_type_f_real_s8 =
 481     init_type (TYPE_CODE_FLT, TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
 482                0,
 483                "real*8", (struct objfile *) NULL);
 484
 485   builtin_type_f_real_s16 =
 486     init_type (TYPE_CODE_FLT, TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
 487                0,
 488                "real*16", (struct objfile *) NULL);
 489
 490   builtin_type_f_complex_s8 =
 491     init_type (TYPE_CODE_COMPLEX, TARGET_COMPLEX_BIT / TARGET_CHAR_BIT,
 492                0,
 493                "complex*8", (struct objfile *) NULL);
 494
 495   builtin_type_f_complex_s16 =
 496     init_type (TYPE_CODE_COMPLEX, TARGET_DOUBLE_COMPLEX_BIT / TARGET_CHAR_BIT,
 497                0,
 498                "complex*16", (struct objfile *) NULL);
 499
 500 #if 0
 501   /* We have a new size == 4 double floats for the
 502      complex*32 data type */
 503
 504   builtin_type_f_complex_s32 =
 505     init_type (TYPE_CODE_COMPLEX, TARGET_EXT_COMPLEX_BIT / TARGET_CHAR_BIT,
 506                0,
 507                "complex*32", (struct objfile *) NULL);
 508 #endif
 509   builtin_type_string =
 510     init_type (TYPE_CODE_STRING, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 511                0,
 512                "character string", (struct objfile *) NULL);
 513
 514   add_language (&f_language_defn);
 515 }
 516
 517 /* Following is dubious stuff that had been in the xcoff reader. */
 518
 519 struct saved_fcn
 520 {
 521   long                         line_offset;  /* Line offset for function */
 522   struct saved_fcn             *next;
 523 };
 524
 525
 526 struct saved_bf_symnum
 527 {
 528   long       symnum_fcn;  /* Symnum of function (i.e. .function directive) */
 529   long       symnum_bf;   /* Symnum of .bf for this function */
 530   struct saved_bf_symnum *next;
 531 };
 532
 533 typedef struct saved_fcn           SAVED_FUNCTION, *SAVED_FUNCTION_PTR;
 534 typedef struct saved_bf_symnum     SAVED_BF, *SAVED_BF_PTR;
 535
 536
 537 SAVED_BF_PTR allocate_saved_bf_node()
 538 {
 539   SAVED_BF_PTR new;
 540
 541   new = (SAVED_BF_PTR) malloc (sizeof (SAVED_BF));
 542
 543   if (new == NULL)
 544     fatal("could not allocate enough memory to save one more .bf on save list");
 545   return(new);
 546 }
 547
 548 SAVED_FUNCTION *allocate_saved_function_node()
 549 {
 550   SAVED_FUNCTION *new;
 551
 552   new = (SAVED_FUNCTION *) malloc (sizeof (SAVED_FUNCTION));
 553
 554   if (new == NULL)
 555     fatal("could not allocate enough memory to save one more function on save list");
 556
 557   return(new);
 558 }
 559
 560 SAVED_F77_COMMON_PTR allocate_saved_f77_common_node()
 561 {
 562   SAVED_F77_COMMON_PTR new;
 563
 564   new = (SAVED_F77_COMMON_PTR) malloc (sizeof (SAVED_F77_COMMON));
 565
 566   if (new == NULL)
 567     fatal("could not allocate enough memory to save one more F77 COMMON blk on save list");
 568
 569   return(new);
 570 }
 571
 572 COMMON_ENTRY_PTR allocate_common_entry_node()
 573 {
 574   COMMON_ENTRY_PTR new;
 575
 576   new = (COMMON_ENTRY_PTR) malloc (sizeof (COMMON_ENTRY));
 577
 578   if (new == NULL)
 579     fatal("could not allocate enough memory to save one more COMMON entry on save list");
 580
 581   return(new);
 582 }
 583
 584
 585 SAVED_F77_COMMON_PTR head_common_list=NULL;     /* Ptr to 1st saved COMMON  */
 586 SAVED_F77_COMMON_PTR tail_common_list=NULL;     /* Ptr to last saved COMMON  */
 587 SAVED_F77_COMMON_PTR current_common=NULL;       /* Ptr to current COMMON */
 588
 589 static SAVED_BF_PTR saved_bf_list=NULL;          /* Ptr to (.bf,function)
 590                                                     list*/
 591 static SAVED_BF_PTR saved_bf_list_end=NULL;      /* Ptr to above list's end */
 592 static SAVED_BF_PTR current_head_bf_list=NULL;   /* Current head of above list
 593                                                   */
 594
 595 static SAVED_BF_PTR tmp_bf_ptr;                  /* Generic temporary for use
 596                                                     in macros */
 597
 598
 599 /* The following function simply enters a given common block onto
 600    the global common block chain */
 601
 602 void add_common_block(name,offset,secnum,func_stab)
 603      char *name;
 604      CORE_ADDR offset;
 605      int secnum;
 606      char *func_stab;
 607
 608 {
 609   SAVED_F77_COMMON_PTR tmp;
 610   char *c,*local_copy_func_stab;
 611
 612   /* If the COMMON block we are trying to add has a blank
 613      name (i.e. "#BLNK_COM") then we set it to __BLANK
 614      because the darn "#" character makes GDB's input
 615      parser have fits. */
 616
 617
 618   if (STREQ(name,BLANK_COMMON_NAME_ORIGINAL) ||
 619       STREQ(name,BLANK_COMMON_NAME_MF77))
 620     {
 621
 622       free(name);
 623       name = alloca(strlen(BLANK_COMMON_NAME_LOCAL) + 1);
 624       strcpy(name,BLANK_COMMON_NAME_LOCAL);
 625     }
 626
 627   tmp = allocate_saved_f77_common_node();
 628
 629   local_copy_func_stab = malloc (strlen(func_stab) + 1);
 630   strcpy(local_copy_func_stab,func_stab);
 631
 632   tmp->name = malloc(strlen(name) + 1);
 633
 634   /* local_copy_func_stab is a stabstring, let us first extract the
 635      function name from the stab by NULLing out the ':' character. */
 636
 637
 638   c = NULL;
 639   c = strchr(local_copy_func_stab,':');
 640
 641   if (c)
 642     *c = '\0';
 643   else
 644     error("Malformed function STAB found in add_common_block()");
 645
 646
 647   tmp->owning_function = malloc (strlen(local_copy_func_stab) + 1);
 648
 649   strcpy(tmp->owning_function,local_copy_func_stab);
 650
 651   strcpy(tmp->name,name);
 652   tmp->offset = offset;
 653   tmp->next = NULL;
 654   tmp->entries = NULL;
 655   tmp->secnum = secnum;
 656
 657   current_common = tmp;
 658
 659   if (head_common_list == NULL)
 660     {
 661       head_common_list = tail_common_list = tmp;
 662     }
 663   else
 664     {
 665       tail_common_list->next = tmp;
 666       tail_common_list = tmp;
 667     }
 668
 669 }
 670
 671
 672 /* The following function simply enters a given common entry onto
 673    the "current_common" block that has been saved away. */
 674
 675 void add_common_entry(entry_sym_ptr)
 676      struct symbol *entry_sym_ptr;
 677 {
 678   COMMON_ENTRY_PTR tmp;
 679
 680
 681
 682   /* The order of this list is important, since
 683      we expect the entries to appear in decl.
 684      order when we later issue "info common" calls */
 685
 686   tmp = allocate_common_entry_node();
 687
 688   tmp->next = NULL;
 689   tmp->symbol = entry_sym_ptr;
 690
 691   if (current_common == NULL)
 692     error("Attempt to add COMMON entry with no block open!");
 693   else
 694     {
 695       if (current_common->entries == NULL)
 696         {
 697           current_common->entries = tmp;
 698           current_common->end_of_entries = tmp;
 699         }
 700       else
 701         {
 702           current_common->end_of_entries->next = tmp;
 703           current_common->end_of_entries = tmp;
 704         }
 705     }
 706
 707
 708 }
 709
 710 /* This routine finds the first encountred COMMON block named "name" */
 711
 712 SAVED_F77_COMMON_PTR find_first_common_named(name)
 713      char *name;
 714 {
 715
 716   SAVED_F77_COMMON_PTR tmp;
 717
 718   tmp = head_common_list;
 719
 720   while (tmp != NULL)
 721     {
 722       if (STREQ(tmp->name,name))
 723         return(tmp);
 724       else
 725         tmp = tmp->next;
 726     }
 727   return(NULL);
 728 }
 729
 730 /* This routine finds the first encountred COMMON block named "name"
 731    that belongs to function funcname */
 732
 733 SAVED_F77_COMMON_PTR find_common_for_function(name, funcname)
 734      char *name;
 735      char *funcname;
 736 {
 737
 738   SAVED_F77_COMMON_PTR tmp;
 739
 740   tmp = head_common_list;
 741
 742   while (tmp != NULL)
 743     {
 744       if (STREQ(tmp->name,name) && STREQ(tmp->owning_function,funcname))
 745         return(tmp);
 746       else
 747         tmp = tmp->next;
 748     }
 749   return(NULL);
 750 }
 751
 752
 753
 754
 755 /* The following function is called to patch up the offsets
 756    for the statics contained in the COMMON block named
 757    "name."  */
 758
 759
 760 void patch_common_entries (blk, offset, secnum)
 761      SAVED_F77_COMMON_PTR blk;
 762      CORE_ADDR offset;
 763      int secnum;
 764 {
 765   COMMON_ENTRY_PTR entry;
 766
 767   blk->offset = offset;  /* Keep this around for future use. */
 768
 769   entry = blk->entries;
 770
 771   while (entry != NULL)
 772     {
 773       SYMBOL_VALUE (entry->symbol) += offset;
 774       SYMBOL_SECTION (entry->symbol) = secnum;
 775
 776       entry = entry->next;
 777     }
 778   blk->secnum = secnum;
 779 }
 780
 781
 782 /* Patch all commons named "name" that need patching.Since COMMON
 783    blocks occur with relative infrequency, we simply do a linear scan on
 784    the name.  Eventually, the best way to do this will be a
 785    hashed-lookup.  Secnum is the section number for the .bss section
 786    (which is where common data lives). */
 787
 788
 789 void patch_all_commons_by_name (name, offset, secnum)
 790      char *name;
 791      CORE_ADDR offset;
 792      int secnum;
 793 {
 794
 795   SAVED_F77_COMMON_PTR tmp;
 796
 797   /* For blank common blocks, change the canonical reprsentation
 798      of a blank name */
 799
 800   if ((STREQ(name,BLANK_COMMON_NAME_ORIGINAL)) ||
 801       (STREQ(name,BLANK_COMMON_NAME_MF77)))
 802     {
 803       free(name);
 804       name = alloca(strlen(BLANK_COMMON_NAME_LOCAL) + 1);
 805       strcpy(name,BLANK_COMMON_NAME_LOCAL);
 806     }
 807
 808   tmp = head_common_list;
 809
 810   while (tmp != NULL)
 811     {
 812       if (COMMON_NEEDS_PATCHING(tmp))
 813         if (STREQ(tmp->name,name))
 814           patch_common_entries(tmp,offset,secnum);
 815
 816       tmp = tmp->next;
 817     }
 818
 819 }
 820
 821
 822
 823
 824
 825 /* This macro adds the symbol-number for the start of the function
 826    (the symbol number of the .bf) referenced by symnum_fcn to a
 827    list.  This list, in reality should be a FIFO queue but since
 828    #line pragmas sometimes cause line ranges to get messed up
 829    we simply create a linear list.  This list can then be searched
 830    first by a queueing algorithm and upon failure fall back to
 831    a linear scan. */
 832
 833 #define ADD_BF_SYMNUM(bf_sym,fcn_sym) \
 834   \
 835   if (saved_bf_list == NULL) \
 836 { \
 837     tmp_bf_ptr = allocate_saved_bf_node(); \
 838       \
 839         tmp_bf_ptr->symnum_bf = (bf_sym); \
 840           tmp_bf_ptr->symnum_fcn = (fcn_sym);  \
 841             tmp_bf_ptr->next = NULL; \
 842               \
 843                 current_head_bf_list = saved_bf_list = tmp_bf_ptr; \
 844                   saved_bf_list_end = tmp_bf_ptr; \
 845                   } \
 846 else \
 847 {  \
 848      tmp_bf_ptr = allocate_saved_bf_node(); \
 849        \
 850          tmp_bf_ptr->symnum_bf = (bf_sym);  \
 851            tmp_bf_ptr->symnum_fcn = (fcn_sym);  \
 852              tmp_bf_ptr->next = NULL;  \
 853                \
 854                  saved_bf_list_end->next = tmp_bf_ptr;  \
 855                    saved_bf_list_end = tmp_bf_ptr; \
 856                    }
 857
 858
 859 /* This function frees the entire (.bf,function) list */
 860
 861 void
 862   clear_bf_list()
 863 {
 864
 865   SAVED_BF_PTR tmp = saved_bf_list;
 866   SAVED_BF_PTR next = NULL;
 867
 868   while (tmp != NULL)
 869     {
 870       next = tmp->next;
 871       free(tmp);
 872       tmp=next;
 873     }
 874   saved_bf_list = NULL;
 875 }
 876
 877 int global_remote_debug;
 878
 879 long
 880 get_bf_for_fcn (the_function)
 881      long the_function;
 882 {
 883   SAVED_BF_PTR tmp;
 884   int nprobes = 0;
 885   long retval = 0;
 886
 887   /* First use a simple queuing algorithm (i.e. look and see if the
 888      item at the head of the queue is the one you want)  */
 889
 890   if (saved_bf_list == NULL)
 891     fatal ("cannot get .bf node off empty list");
 892
 893   if (current_head_bf_list != NULL)
 894     if (current_head_bf_list->symnum_fcn == the_function)
 895       {
 896         if (global_remote_debug)
 897           fprintf(stderr,"*");
 898
 899         tmp = current_head_bf_list;
 900         current_head_bf_list = current_head_bf_list->next;
 901         return(tmp->symnum_bf);
 902       }
 903
 904   /* If the above did not work (probably because #line directives were
 905      used in the sourcefile and they messed up our internal tables) we now do
 906      the ugly linear scan */
 907
 908   if (global_remote_debug)
 909     fprintf(stderr,"\ndefaulting to linear scan\n");
 910
 911   nprobes = 0;
 912   tmp = saved_bf_list;
 913   while (tmp != NULL)
 914     {
 915       nprobes++;
 916       if (tmp->symnum_fcn == the_function)
 917         {
 918           if (global_remote_debug)
 919             fprintf(stderr,"Found in %d probes\n",nprobes);
 920           current_head_bf_list = tmp->next;
 921           return(tmp->symnum_bf);
 922         }
 923       tmp= tmp->next;
 924     }
 925
 926   return(-1);
 927 }
 928
 929 static SAVED_FUNCTION_PTR saved_function_list=NULL;
 930 static SAVED_FUNCTION_PTR saved_function_list_end=NULL;
 931
 932 void clear_function_list()
 933 {
 934   SAVED_FUNCTION_PTR tmp = saved_function_list;
 935   SAVED_FUNCTION_PTR next = NULL;
 936
 937   while (tmp != NULL)
 938     {
 939       next = tmp->next;
 940       free(tmp);
 941       tmp = next;
 942     }
 943
 944   saved_function_list = NULL;
 945 }