gdb/f-lang.c

   1 /* Fortran language support routines for GDB, the GNU debugger.
   2    Copyright 1993, 1994, 1996 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  21
  22 #include "defs.h"
  23 #include "gdb_string.h"
  24 #include "symtab.h"
  25 #include "gdbtypes.h"
  26 #include "expression.h"
  27 #include "parser-defs.h"
  28 #include "language.h"
  29 #include "f-lang.h"
  30
  31 /* The built-in types of F77.  FIXME: integer*4 is missing, plain
  32    logical is missing (builtin_type_logical is logical*4).  */
  33
  34 struct type *builtin_type_f_character;
  35 struct type *builtin_type_f_logical;
  36 struct type *builtin_type_f_logical_s1;
  37 struct type *builtin_type_f_logical_s2;
  38 struct type *builtin_type_f_integer;
  39 struct type *builtin_type_f_integer_s2;
  40 struct type *builtin_type_f_real;
  41 struct type *builtin_type_f_real_s8;
  42 struct type *builtin_type_f_real_s16;
  43 struct type *builtin_type_f_complex_s8;
  44 struct type *builtin_type_f_complex_s16;
  45 struct type *builtin_type_f_complex_s32;
  46 struct type *builtin_type_f_void;
  47
  48 /* Following is dubious stuff that had been in the xcoff reader. */
  49
  50 struct saved_fcn
  51 {
  52   long                         line_offset;  /* Line offset for function */
  53   struct saved_fcn             *next;
  54 };
  55
  56
  57 struct saved_bf_symnum
  58 {
  59   long       symnum_fcn;  /* Symnum of function (i.e. .function directive) */
  60   long       symnum_bf;   /* Symnum of .bf for this function */
  61   struct saved_bf_symnum *next;
  62 };
  63
  64 typedef struct saved_fcn           SAVED_FUNCTION, *SAVED_FUNCTION_PTR;
  65 typedef struct saved_bf_symnum     SAVED_BF, *SAVED_BF_PTR;
  66
  67 /* Local functions */
  68
  69 #if 0
  70 static void clear_function_list PARAMS ((void));
  71 static long get_bf_for_fcn PARAMS ((long));
  72 static void clear_bf_list PARAMS ((void));
  73 static void patch_all_commons_by_name PARAMS ((char *, CORE_ADDR, int));
  74 static SAVED_F77_COMMON_PTR find_first_common_named PARAMS ((char *));
  75 static void add_common_entry PARAMS ((struct symbol *));
  76 static void add_common_block PARAMS ((char *, CORE_ADDR, int, char *));
  77 static SAVED_FUNCTION *allocate_saved_function_node PARAMS ((void));
  78 static SAVED_BF_PTR allocate_saved_bf_node PARAMS ((void));
  79 static COMMON_ENTRY_PTR allocate_common_entry_node PARAMS ((void));
  80 static SAVED_F77_COMMON_PTR allocate_saved_f77_common_node PARAMS ((void));
  81 static void patch_common_entries PARAMS ((SAVED_F77_COMMON_PTR, CORE_ADDR, int));
  82 #endif
  83
  84 static struct type *f_create_fundamental_type PARAMS ((struct objfile *, int));
  85 static void f_printstr PARAMS ((GDB_FILE *stream, char *string, unsigned int length, int width, int force_ellipses));
  86 static void f_printchar PARAMS ((int c, GDB_FILE *stream));
  87 static void f_emit_char PARAMS ((int c, GDB_FILE *stream, int quoter));
  88
  89 /* Print the character C on STREAM as part of the contents of a literal
  90    string whose delimiter is QUOTER.  Note that that format for printing
  91    characters and strings is language specific.
  92    FIXME:  This is a copy of the same function from c-exp.y.  It should
  93    be replaced with a true F77 version.  */
  94
  95 static void
  96 f_emit_char (c, stream, quoter)
  97      register int c;
  98      GDB_FILE *stream;
  99      int quoter;
 100 {
 101   c &= 0xFF;                    /* Avoid sign bit follies */
 102
 103   if (PRINT_LITERAL_FORM (c))
 104     {
 105       if (c == '\\' || c == quoter)
 106         fputs_filtered ("\\", stream);
 107       fprintf_filtered (stream, "%c", c);
 108     }
 109   else
 110     {
 111       switch (c)
 112         {
 113         case '\n':
 114           fputs_filtered ("\\n", stream);
 115           break;
 116         case '\b':
 117           fputs_filtered ("\\b", stream);
 118           break;
 119         case '\t':
 120           fputs_filtered ("\\t", stream);
 121           break;
 122         case '\f':
 123           fputs_filtered ("\\f", stream);
 124           break;
 125         case '\r':
 126           fputs_filtered ("\\r", stream);
 127           break;
 128         case '\033':
 129           fputs_filtered ("\\e", stream);
 130           break;
 131         case '\007':
 132           fputs_filtered ("\\a", stream);
 133           break;
 134         default:
 135           fprintf_filtered (stream, "\\%.3o", (unsigned int) c);
 136           break;
 137         }
 138     }
 139 }
 140
 141 /* FIXME:  This is a copy of the same function from c-exp.y.  It should
 142    be replaced with a true F77version. */
 143
 144 static void
 145 f_printchar (c, stream)
 146      int c;
 147      GDB_FILE *stream;
 148 {
 149   fputs_filtered ("'", stream);
 150   LA_EMIT_CHAR (c, stream, '\'');
 151   fputs_filtered ("'", stream);
 152 }
 153
 154 /* Print the character string STRING, printing at most LENGTH characters.
 155    Printing stops early if the number hits print_max; repeat counts
 156    are printed as appropriate.  Print ellipses at the end if we
 157    had to stop before printing LENGTH characters, or if FORCE_ELLIPSES.
 158    FIXME:  This is a copy of the same function from c-exp.y.  It should
 159    be replaced with a true F77 version. */
 160
 161 static void
 162 f_printstr (stream, string, length, width, force_ellipses)
 163      GDB_FILE *stream;
 164      char *string;
 165      unsigned int length;
 166      int width;
 167      int force_ellipses;
 168 {
 169   register unsigned int i;
 170   unsigned int things_printed = 0;
 171   int in_quotes = 0;
 172   int need_comma = 0;
 173   extern int inspect_it;
 174   extern int repeat_count_threshold;
 175   extern int print_max;
 176
 177   if (length == 0)
 178     {
 179       fputs_filtered ("''", gdb_stdout);
 180       return;
 181     }
 182
 183   for (i = 0; i < length && things_printed < print_max; ++i)
 184     {
 185       /* Position of the character we are examining
 186          to see whether it is repeated.  */
 187       unsigned int rep1;
 188       /* Number of repetitions we have detected so far.  */
 189       unsigned int reps;
 190
 191       QUIT;
 192
 193       if (need_comma)
 194         {
 195           fputs_filtered (", ", stream);
 196           need_comma = 0;
 197         }
 198
 199       rep1 = i + 1;
 200       reps = 1;
 201       while (rep1 < length && string[rep1] == string[i])
 202         {
 203           ++rep1;
 204           ++reps;
 205         }
 206
 207       if (reps > repeat_count_threshold)
 208         {
 209           if (in_quotes)
 210             {
 211               if (inspect_it)
 212                 fputs_filtered ("\\', ", stream);
 213               else
 214                 fputs_filtered ("', ", stream);
 215               in_quotes = 0;
 216             }
 217           f_printchar (string[i], stream);
 218           fprintf_filtered (stream, " <repeats %u times>", reps);
 219           i = rep1 - 1;
 220           things_printed += repeat_count_threshold;
 221           need_comma = 1;
 222         }
 223       else
 224         {
 225           if (!in_quotes)
 226             {
 227               if (inspect_it)
 228                 fputs_filtered ("\\'", stream);
 229               else
 230                 fputs_filtered ("'", stream);
 231               in_quotes = 1;
 232             }
 233           LA_EMIT_CHAR (string[i], stream, '"');
 234           ++things_printed;
 235         }
 236     }
 237
 238   /* Terminate the quotes if necessary.  */
 239   if (in_quotes)
 240     {
 241       if (inspect_it)
 242         fputs_filtered ("\\'", stream);
 243       else
 244         fputs_filtered ("'", stream);
 245     }
 246
 247   if (force_ellipses || i < length)
 248     fputs_filtered ("...", stream);
 249 }
 250
 251 /* FIXME:  This is a copy of c_create_fundamental_type(), before
 252    all the non-C types were stripped from it.  Needs to be fixed
 253    by an experienced F77 programmer. */
 254
 255 static struct type *
 256 f_create_fundamental_type (objfile, typeid)
 257      struct objfile *objfile;
 258      int typeid;
 259 {
 260   register struct type *type = NULL;
 261
 262   switch (typeid)
 263     {
 264     case FT_VOID:
 265       type = init_type (TYPE_CODE_VOID,
 266                         TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 267                         0, "VOID", objfile);
 268       break;
 269     case FT_BOOLEAN:
 270       type = init_type (TYPE_CODE_BOOL,
 271                         TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 272                         TYPE_FLAG_UNSIGNED, "boolean", objfile);
 273       break;
 274     case FT_STRING:
 275       type = init_type (TYPE_CODE_STRING,
 276                         TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 277                         0, "string", objfile);
 278       break;
 279     case FT_CHAR:
 280       type = init_type (TYPE_CODE_INT,
 281                         TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 282                         0, "character", objfile);
 283       break;
 284     case FT_SIGNED_CHAR:
 285       type = init_type (TYPE_CODE_INT,
 286                         TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 287                         0, "integer*1", objfile);
 288       break;
 289     case FT_UNSIGNED_CHAR:
 290       type = init_type (TYPE_CODE_BOOL,
 291                         TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 292                         TYPE_FLAG_UNSIGNED, "logical*1", objfile);
 293       break;
 294     case FT_SHORT:
 295       type = init_type (TYPE_CODE_INT,
 296                         TARGET_SHORT_BIT / TARGET_CHAR_BIT,
 297                         0, "integer*2", objfile);
 298       break;
 299     case FT_SIGNED_SHORT:
 300       type = init_type (TYPE_CODE_INT,
 301                         TARGET_SHORT_BIT / TARGET_CHAR_BIT,
 302                         0, "short", objfile);   /* FIXME-fnf */
 303       break;
 304     case FT_UNSIGNED_SHORT:
 305       type = init_type (TYPE_CODE_BOOL,
 306                         TARGET_SHORT_BIT / TARGET_CHAR_BIT,
 307                         TYPE_FLAG_UNSIGNED, "logical*2", objfile);
 308       break;
 309     case FT_INTEGER:
 310       type = init_type (TYPE_CODE_INT,
 311                         TARGET_INT_BIT / TARGET_CHAR_BIT,
 312                         0, "integer*4", objfile);
 313       break;
 314     case FT_SIGNED_INTEGER:
 315       type = init_type (TYPE_CODE_INT,
 316                         TARGET_INT_BIT / TARGET_CHAR_BIT,
 317                         0, "integer", objfile); /* FIXME -fnf */
 318       break;
 319     case FT_UNSIGNED_INTEGER:
 320       type = init_type (TYPE_CODE_BOOL,
 321                         TARGET_INT_BIT / TARGET_CHAR_BIT,
 322                         TYPE_FLAG_UNSIGNED, "logical*4", objfile);
 323       break;
 324     case FT_FIXED_DECIMAL:
 325       type = init_type (TYPE_CODE_INT,
 326                         TARGET_INT_BIT / TARGET_CHAR_BIT,
 327                         0, "fixed decimal", objfile);
 328       break;
 329     case FT_LONG:
 330       type = init_type (TYPE_CODE_INT,
 331                         TARGET_LONG_BIT / TARGET_CHAR_BIT,
 332                         0, "long", objfile);
 333       break;
 334     case FT_SIGNED_LONG:
 335       type = init_type (TYPE_CODE_INT,
 336                         TARGET_LONG_BIT / TARGET_CHAR_BIT,
 337                         0, "long", objfile); /* FIXME -fnf */
 338       break;
 339     case FT_UNSIGNED_LONG:
 340       type = init_type (TYPE_CODE_INT,
 341                         TARGET_LONG_BIT / TARGET_CHAR_BIT,
 342                         TYPE_FLAG_UNSIGNED, "unsigned long", objfile);
 343       break;
 344     case FT_LONG_LONG:
 345       type = init_type (TYPE_CODE_INT,
 346                         TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
 347                         0, "long long", objfile);
 348       break;
 349     case FT_SIGNED_LONG_LONG:
 350       type = init_type (TYPE_CODE_INT,
 351                         TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
 352                         0, "signed long long", objfile);
 353       break;
 354     case FT_UNSIGNED_LONG_LONG:
 355       type = init_type (TYPE_CODE_INT,
 356                         TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
 357                         TYPE_FLAG_UNSIGNED, "unsigned long long", objfile);
 358       break;
 359     case FT_FLOAT:
 360       type = init_type (TYPE_CODE_FLT,
 361                         TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
 362                         0, "real", objfile);
 363       break;
 364     case FT_DBL_PREC_FLOAT:
 365       type = init_type (TYPE_CODE_FLT,
 366                         TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
 367                         0, "real*8", objfile);
 368       break;
 369     case FT_FLOAT_DECIMAL:
 370       type = init_type (TYPE_CODE_FLT,
 371                         TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
 372                         0, "floating decimal", objfile);
 373       break;
 374     case FT_EXT_PREC_FLOAT:
 375       type = init_type (TYPE_CODE_FLT,
 376                         TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
 377                         0, "real*16", objfile);
 378       break;
 379     case FT_COMPLEX:
 380       type = init_type (TYPE_CODE_COMPLEX,
 381                         2 * TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
 382                         0, "complex*8", objfile);
 383       TYPE_TARGET_TYPE (type) = builtin_type_f_real;
 384       break;
 385     case FT_DBL_PREC_COMPLEX:
 386       type = init_type (TYPE_CODE_COMPLEX,
 387                         2 * TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
 388                         0, "complex*16", objfile);
 389       TYPE_TARGET_TYPE (type) = builtin_type_f_real_s8;
 390       break;
 391     case FT_EXT_PREC_COMPLEX:
 392       type = init_type (TYPE_CODE_COMPLEX,
 393                         2 * TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
 394                         0, "complex*32", objfile);
 395       TYPE_TARGET_TYPE (type) = builtin_type_f_real_s16;
 396       break;
 397     default:
 398       /* FIXME:  For now, if we are asked to produce a type not in this
 399          language, create the equivalent of a C integer type with the
 400          name "<?type?>".  When all the dust settles from the type
 401          reconstruction work, this should probably become an error. */
 402       type = init_type (TYPE_CODE_INT,
 403                         TARGET_INT_BIT / TARGET_CHAR_BIT,
 404                         0, "<?type?>", objfile);
 405       warning ("internal error: no F77 fundamental type %d", typeid);
 406       break;
 407     }
 408   return (type);
 409 }
 410
 411 \f
 412 /* Table of operators and their precedences for printing expressions.  */
 413
 414 static const struct op_print f_op_print_tab[] = {
 415   { "+",     BINOP_ADD, PREC_ADD, 0 },
 416   { "+",     UNOP_PLUS, PREC_PREFIX, 0 },
 417   { "-",     BINOP_SUB, PREC_ADD, 0 },
 418   { "-",     UNOP_NEG, PREC_PREFIX, 0 },
 419   { "*",     BINOP_MUL, PREC_MUL, 0 },
 420   { "/",     BINOP_DIV, PREC_MUL, 0 },
 421   { "DIV",   BINOP_INTDIV, PREC_MUL, 0 },
 422   { "MOD",   BINOP_REM, PREC_MUL, 0 },
 423   { "=",     BINOP_ASSIGN, PREC_ASSIGN, 1 },
 424   { ".OR.",  BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0 },
 425   { ".AND.", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0 },
 426   { ".NOT.", UNOP_LOGICAL_NOT, PREC_PREFIX, 0 },
 427   { ".EQ.",  BINOP_EQUAL, PREC_EQUAL, 0 },
 428   { ".NE.",  BINOP_NOTEQUAL, PREC_EQUAL, 0 },
 429   { ".LE.",  BINOP_LEQ, PREC_ORDER, 0 },
 430   { ".GE.",  BINOP_GEQ, PREC_ORDER, 0 },
 431   { ".GT.",  BINOP_GTR, PREC_ORDER, 0 },
 432   { ".LT.",  BINOP_LESS, PREC_ORDER, 0 },
 433   { "**",    UNOP_IND, PREC_PREFIX, 0 },
 434   { "@",     BINOP_REPEAT, PREC_REPEAT, 0 },
 435   { NULL,    0, 0, 0 }
 436 };
 437 \f
 438 struct type ** CONST_PTR (f_builtin_types[]) =
 439 {
 440   &builtin_type_f_character,
 441   &builtin_type_f_logical,
 442   &builtin_type_f_logical_s1,
 443   &builtin_type_f_logical_s2,
 444   &builtin_type_f_integer,
 445   &builtin_type_f_integer_s2,
 446   &builtin_type_f_real,
 447   &builtin_type_f_real_s8,
 448   &builtin_type_f_real_s16,
 449   &builtin_type_f_complex_s8,
 450   &builtin_type_f_complex_s16,
 451 #if 0
 452   &builtin_type_f_complex_s32,
 453 #endif
 454   &builtin_type_f_void,
 455   0
 456 };
 457
 458 /* This is declared in c-lang.h but it is silly to import that file for what
 459    is already just a hack. */
 460 extern int
 461 c_value_print PARAMS ((struct value *, GDB_FILE *, int, enum val_prettyprint));
 462
 463 const struct language_defn f_language_defn = {
 464   "fortran",
 465   language_fortran,
 466   f_builtin_types,
 467   range_check_on,
 468   type_check_on,
 469   f_parse,                      /* parser */
 470   f_error,                      /* parser error function */
 471   evaluate_subexp_standard,
 472   f_printchar,                  /* Print character constant */
 473   f_printstr,                   /* function to print string constant */
 474   f_emit_char,                  /* Function to print a single character */
 475   f_create_fundamental_type,    /* Create fundamental type in this language */
 476   f_print_type,                 /* Print a type using appropriate syntax */
 477   f_val_print,                  /* Print a value using appropriate syntax */
 478   c_value_print,  /* FIXME */
 479   {"",      "",   "",   ""},    /* Binary format info */
 480   {"0%o",  "0",   "o", ""},     /* Octal format info */
 481   {"%d",   "",    "d", ""},     /* Decimal format info */
 482   {"0x%x", "0x",  "x", ""},     /* Hex format info */
 483   f_op_print_tab,               /* expression operators for printing */
 484   0,                            /* arrays are first-class (not c-style) */
 485   1,                            /* String lower bound */
 486   &builtin_type_f_character,    /* Type of string elements */
 487   LANG_MAGIC
 488   };
 489
 490 void
 491 _initialize_f_language ()
 492 {
 493   builtin_type_f_void =
 494     init_type (TYPE_CODE_VOID, 1,
 495                0,
 496                "VOID", (struct objfile *) NULL);
 497
 498   builtin_type_f_character =
 499     init_type (TYPE_CODE_INT, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 500                0,
 501                "character", (struct objfile *) NULL);
 502
 503   builtin_type_f_logical_s1 =
 504     init_type (TYPE_CODE_BOOL, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 505                TYPE_FLAG_UNSIGNED,
 506                "logical*1", (struct objfile *) NULL);
 507
 508   builtin_type_f_integer_s2 =
 509     init_type (TYPE_CODE_INT, TARGET_SHORT_BIT / TARGET_CHAR_BIT,
 510                0,
 511                "integer*2", (struct objfile *) NULL);
 512
 513   builtin_type_f_logical_s2 =
 514     init_type (TYPE_CODE_BOOL, TARGET_SHORT_BIT / TARGET_CHAR_BIT,
 515                TYPE_FLAG_UNSIGNED,
 516                "logical*2", (struct objfile *) NULL);
 517
 518   builtin_type_f_integer =
 519     init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT,
 520                0,
 521                "integer", (struct objfile *) NULL);
 522
 523   builtin_type_f_logical =
 524     init_type (TYPE_CODE_BOOL, TARGET_INT_BIT / TARGET_CHAR_BIT,
 525                TYPE_FLAG_UNSIGNED,
 526                "logical*4", (struct objfile *) NULL);
 527
 528   builtin_type_f_real =
 529     init_type (TYPE_CODE_FLT, TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
 530                0,
 531                "real", (struct objfile *) NULL);
 532
 533   builtin_type_f_real_s8 =
 534     init_type (TYPE_CODE_FLT, TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
 535                0,
 536                "real*8", (struct objfile *) NULL);
 537
 538   builtin_type_f_real_s16 =
 539     init_type (TYPE_CODE_FLT, TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
 540                0,
 541                "real*16", (struct objfile *) NULL);
 542
 543   builtin_type_f_complex_s8 =
 544     init_type (TYPE_CODE_COMPLEX, 2 * TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
 545                0,
 546                "complex*8", (struct objfile *) NULL);
 547   TYPE_TARGET_TYPE (builtin_type_f_complex_s8) = builtin_type_f_real;
 548
 549   builtin_type_f_complex_s16 =
 550     init_type (TYPE_CODE_COMPLEX, 2 * TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
 551                0,
 552                "complex*16", (struct objfile *) NULL);
 553   TYPE_TARGET_TYPE (builtin_type_f_complex_s16) = builtin_type_f_real_s8;
 554
 555   /* We have a new size == 4 double floats for the
 556      complex*32 data type */
 557
 558   builtin_type_f_complex_s32 =
 559     init_type (TYPE_CODE_COMPLEX, 2 * TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
 560                0,
 561                "complex*32", (struct objfile *) NULL);
 562   TYPE_TARGET_TYPE (builtin_type_f_complex_s32) = builtin_type_f_real_s16;
 563
 564   builtin_type_string =
 565     init_type (TYPE_CODE_STRING, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 566                0,
 567                "character string", (struct objfile *) NULL);
 568
 569   add_language (&f_language_defn);
 570 }
 571
 572 #if 0
 573 static SAVED_BF_PTR
 574 allocate_saved_bf_node()
 575 {
 576   SAVED_BF_PTR new;
 577
 578   new = (SAVED_BF_PTR) xmalloc (sizeof (SAVED_BF));
 579   return(new);
 580 }
 581
 582 static SAVED_FUNCTION *
 583 allocate_saved_function_node()
 584 {
 585   SAVED_FUNCTION *new;
 586
 587   new = (SAVED_FUNCTION *) xmalloc (sizeof (SAVED_FUNCTION));
 588   return(new);
 589 }
 590
 591 static SAVED_F77_COMMON_PTR allocate_saved_f77_common_node()
 592 {
 593   SAVED_F77_COMMON_PTR new;
 594
 595   new = (SAVED_F77_COMMON_PTR) xmalloc (sizeof (SAVED_F77_COMMON));
 596   return(new);
 597 }
 598
 599 static COMMON_ENTRY_PTR allocate_common_entry_node()
 600 {
 601   COMMON_ENTRY_PTR new;
 602
 603   new = (COMMON_ENTRY_PTR) xmalloc (sizeof (COMMON_ENTRY));
 604   return(new);
 605 }
 606 #endif
 607
 608 SAVED_F77_COMMON_PTR head_common_list=NULL;     /* Ptr to 1st saved COMMON  */
 609 SAVED_F77_COMMON_PTR tail_common_list=NULL;     /* Ptr to last saved COMMON  */
 610 SAVED_F77_COMMON_PTR current_common=NULL;       /* Ptr to current COMMON */
 611
 612 #if 0
 613 static SAVED_BF_PTR saved_bf_list=NULL;          /* Ptr to (.bf,function)
 614                                                     list*/
 615 static SAVED_BF_PTR saved_bf_list_end=NULL;      /* Ptr to above list's end */
 616 static SAVED_BF_PTR current_head_bf_list=NULL;   /* Current head of above list
 617                                                   */
 618
 619 static SAVED_BF_PTR tmp_bf_ptr;                  /* Generic temporary for use
 620                                                     in macros */
 621
 622 /* The following function simply enters a given common block onto
 623    the global common block chain */
 624
 625 static void
 626 add_common_block(name,offset,secnum,func_stab)
 627      char *name;
 628      CORE_ADDR offset;
 629      int secnum;
 630      char *func_stab;
 631 {
 632   SAVED_F77_COMMON_PTR tmp;
 633   char *c,*local_copy_func_stab;
 634
 635   /* If the COMMON block we are trying to add has a blank
 636      name (i.e. "#BLNK_COM") then we set it to __BLANK
 637      because the darn "#" character makes GDB's input
 638      parser have fits. */
 639
 640
 641   if (STREQ(name,BLANK_COMMON_NAME_ORIGINAL) ||
 642       STREQ(name,BLANK_COMMON_NAME_MF77))
 643     {
 644
 645       free(name);
 646       name = alloca(strlen(BLANK_COMMON_NAME_LOCAL) + 1);
 647       strcpy(name,BLANK_COMMON_NAME_LOCAL);
 648     }
 649
 650   tmp = allocate_saved_f77_common_node();
 651
 652   local_copy_func_stab = xmalloc (strlen(func_stab) + 1);
 653   strcpy(local_copy_func_stab,func_stab);
 654
 655   tmp->name = xmalloc(strlen(name) + 1);
 656
 657   /* local_copy_func_stab is a stabstring, let us first extract the
 658      function name from the stab by NULLing out the ':' character. */
 659
 660
 661   c = NULL;
 662   c = strchr(local_copy_func_stab,':');
 663
 664   if (c)
 665     *c = '\0';
 666   else
 667     error("Malformed function STAB found in add_common_block()");
 668
 669
 670   tmp->owning_function = xmalloc (strlen(local_copy_func_stab) + 1);
 671
 672   strcpy(tmp->owning_function,local_copy_func_stab);
 673
 674   strcpy(tmp->name,name);
 675   tmp->offset = offset;
 676   tmp->next = NULL;
 677   tmp->entries = NULL;
 678   tmp->secnum = secnum;
 679
 680   current_common = tmp;
 681
 682   if (head_common_list == NULL)
 683     {
 684       head_common_list = tail_common_list = tmp;
 685     }
 686   else
 687     {
 688       tail_common_list->next = tmp;
 689       tail_common_list = tmp;
 690     }
 691 }
 692 #endif
 693
 694 /* The following function simply enters a given common entry onto
 695    the "current_common" block that has been saved away. */
 696
 697 #if 0
 698 static void
 699 add_common_entry(entry_sym_ptr)
 700      struct symbol *entry_sym_ptr;
 701 {
 702   COMMON_ENTRY_PTR tmp;
 703
 704
 705
 706   /* The order of this list is important, since
 707      we expect the entries to appear in decl.
 708      order when we later issue "info common" calls */
 709
 710   tmp = allocate_common_entry_node();
 711
 712   tmp->next = NULL;
 713   tmp->symbol = entry_sym_ptr;
 714
 715   if (current_common == NULL)
 716     error("Attempt to add COMMON entry with no block open!");
 717   else
 718     {
 719       if (current_common->entries == NULL)
 720         {
 721           current_common->entries = tmp;
 722           current_common->end_of_entries = tmp;
 723         }
 724       else
 725         {
 726           current_common->end_of_entries->next = tmp;
 727           current_common->end_of_entries = tmp;
 728         }
 729     }
 730 }
 731 #endif
 732
 733 /* This routine finds the first encountred COMMON block named "name" */
 734
 735 #if 0
 736 static SAVED_F77_COMMON_PTR
 737 find_first_common_named(name)
 738      char *name;
 739 {
 740
 741   SAVED_F77_COMMON_PTR tmp;
 742
 743   tmp = head_common_list;
 744
 745   while (tmp != NULL)
 746     {
 747       if (STREQ(tmp->name,name))
 748         return(tmp);
 749       else
 750         tmp = tmp->next;
 751     }
 752   return(NULL);
 753 }
 754 #endif
 755
 756 /* This routine finds the first encountred COMMON block named "name"
 757    that belongs to function funcname */
 758
 759 SAVED_F77_COMMON_PTR find_common_for_function(name, funcname)
 760      char *name;
 761      char *funcname;
 762 {
 763
 764   SAVED_F77_COMMON_PTR tmp;
 765
 766   tmp = head_common_list;
 767
 768   while (tmp != NULL)
 769     {
 770       if (STREQ(tmp->name,name) && STREQ(tmp->owning_function,funcname))
 771         return(tmp);
 772       else
 773         tmp = tmp->next;
 774     }
 775   return(NULL);
 776 }
 777
 778
 779 #if 0
 780
 781 /* The following function is called to patch up the offsets
 782    for the statics contained in the COMMON block named
 783    "name."  */
 784
 785 static void
 786 patch_common_entries (blk, offset, secnum)
 787      SAVED_F77_COMMON_PTR blk;
 788      CORE_ADDR offset;
 789      int secnum;
 790 {
 791   COMMON_ENTRY_PTR entry;
 792
 793   blk->offset = offset;  /* Keep this around for future use. */
 794
 795   entry = blk->entries;
 796
 797   while (entry != NULL)
 798     {
 799       SYMBOL_VALUE (entry->symbol) += offset;
 800       SYMBOL_SECTION (entry->symbol) = secnum;
 801
 802       entry = entry->next;
 803     }
 804   blk->secnum = secnum;
 805 }
 806
 807 /* Patch all commons named "name" that need patching.Since COMMON
 808    blocks occur with relative infrequency, we simply do a linear scan on
 809    the name.  Eventually, the best way to do this will be a
 810    hashed-lookup.  Secnum is the section number for the .bss section
 811    (which is where common data lives). */
 812
 813 static void
 814 patch_all_commons_by_name (name, offset, secnum)
 815      char *name;
 816      CORE_ADDR offset;
 817      int secnum;
 818 {
 819
 820   SAVED_F77_COMMON_PTR tmp;
 821
 822   /* For blank common blocks, change the canonical reprsentation
 823      of a blank name */
 824
 825   if ((STREQ(name,BLANK_COMMON_NAME_ORIGINAL)) ||
 826       (STREQ(name,BLANK_COMMON_NAME_MF77)))
 827     {
 828       free(name);
 829       name = alloca(strlen(BLANK_COMMON_NAME_LOCAL) + 1);
 830       strcpy(name,BLANK_COMMON_NAME_LOCAL);
 831     }
 832
 833   tmp = head_common_list;
 834
 835   while (tmp != NULL)
 836     {
 837       if (COMMON_NEEDS_PATCHING(tmp))
 838         if (STREQ(tmp->name,name))
 839           patch_common_entries(tmp,offset,secnum);
 840
 841       tmp = tmp->next;
 842     }
 843 }
 844 #endif
 845
 846 /* This macro adds the symbol-number for the start of the function
 847    (the symbol number of the .bf) referenced by symnum_fcn to a
 848    list.  This list, in reality should be a FIFO queue but since
 849    #line pragmas sometimes cause line ranges to get messed up
 850    we simply create a linear list.  This list can then be searched
 851    first by a queueing algorithm and upon failure fall back to
 852    a linear scan. */
 853
 854 #if 0
 855 #define ADD_BF_SYMNUM(bf_sym,fcn_sym) \
 856   \
 857   if (saved_bf_list == NULL) \
 858 { \
 859     tmp_bf_ptr = allocate_saved_bf_node(); \
 860       \
 861         tmp_bf_ptr->symnum_bf = (bf_sym); \
 862           tmp_bf_ptr->symnum_fcn = (fcn_sym);  \
 863             tmp_bf_ptr->next = NULL; \
 864               \
 865                 current_head_bf_list = saved_bf_list = tmp_bf_ptr; \
 866                   saved_bf_list_end = tmp_bf_ptr; \
 867                   } \
 868 else \
 869 {  \
 870      tmp_bf_ptr = allocate_saved_bf_node(); \
 871        \
 872          tmp_bf_ptr->symnum_bf = (bf_sym);  \
 873            tmp_bf_ptr->symnum_fcn = (fcn_sym);  \
 874              tmp_bf_ptr->next = NULL;  \
 875                \
 876                  saved_bf_list_end->next = tmp_bf_ptr;  \
 877                    saved_bf_list_end = tmp_bf_ptr; \
 878                    }
 879 #endif
 880
 881 /* This function frees the entire (.bf,function) list */
 882
 883 #if 0
 884 static void
 885   clear_bf_list()
 886 {
 887
 888   SAVED_BF_PTR tmp = saved_bf_list;
 889   SAVED_BF_PTR next = NULL;
 890
 891   while (tmp != NULL)
 892     {
 893       next = tmp->next;
 894       free(tmp);
 895       tmp=next;
 896     }
 897   saved_bf_list = NULL;
 898 }
 899 #endif
 900
 901 int global_remote_debug;
 902
 903 #if 0
 904
 905 static long
 906 get_bf_for_fcn (the_function)
 907      long the_function;
 908 {
 909   SAVED_BF_PTR tmp;
 910   int nprobes = 0;
 911
 912   /* First use a simple queuing algorithm (i.e. look and see if the
 913      item at the head of the queue is the one you want)  */
 914
 915   if (saved_bf_list == NULL)
 916     fatal ("cannot get .bf node off empty list");
 917
 918   if (current_head_bf_list != NULL)
 919     if (current_head_bf_list->symnum_fcn == the_function)
 920       {
 921         if (global_remote_debug)
 922           fprintf(stderr,"*");
 923
 924         tmp = current_head_bf_list;
 925         current_head_bf_list = current_head_bf_list->next;
 926         return(tmp->symnum_bf);
 927       }
 928
 929   /* If the above did not work (probably because #line directives were
 930      used in the sourcefile and they messed up our internal tables) we now do
 931      the ugly linear scan */
 932
 933   if (global_remote_debug)
 934     fprintf(stderr,"\ndefaulting to linear scan\n");
 935
 936   nprobes = 0;
 937   tmp = saved_bf_list;
 938   while (tmp != NULL)
 939     {
 940       nprobes++;
 941       if (tmp->symnum_fcn == the_function)
 942         {
 943           if (global_remote_debug)
 944             fprintf(stderr,"Found in %d probes\n",nprobes);
 945           current_head_bf_list = tmp->next;
 946           return(tmp->symnum_bf);
 947         }
 948       tmp= tmp->next;
 949     }
 950
 951   return(-1);
 952 }
 953
 954 static SAVED_FUNCTION_PTR saved_function_list=NULL;
 955 static SAVED_FUNCTION_PTR saved_function_list_end=NULL;
 956
 957 static void
 958 clear_function_list()
 959 {
 960   SAVED_FUNCTION_PTR tmp = saved_function_list;
 961   SAVED_FUNCTION_PTR next = NULL;
 962
 963   while (tmp != NULL)
 964     {
 965       next = tmp->next;
 966       free(tmp);
 967       tmp = next;
 968     }
 969
 970   saved_function_list = NULL;
 971 }
 972 #endif
 973