gdb/f-lang.c

   1 /* Fortran language support routines for GDB, the GNU debugger.
   2    Copyright 1993, 1994, 1996, 2000 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,
  21    Boston, MA 02111-1307, USA.  */
  22
  23 #include "defs.h"
  24 #include "gdb_string.h"
  25 #include "symtab.h"
  26 #include "gdbtypes.h"
  27 #include "expression.h"
  28 #include "parser-defs.h"
  29 #include "language.h"
  30 #include "f-lang.h"
  31 #include "valprint.h"
  32
  33 /* The built-in types of F77.  FIXME: integer*4 is missing, plain
  34    logical is missing (builtin_type_logical is logical*4).  */
  35
  36 struct type *builtin_type_f_character;
  37 struct type *builtin_type_f_logical;
  38 struct type *builtin_type_f_logical_s1;
  39 struct type *builtin_type_f_logical_s2;
  40 struct type *builtin_type_f_integer;
  41 struct type *builtin_type_f_integer_s2;
  42 struct type *builtin_type_f_real;
  43 struct type *builtin_type_f_real_s8;
  44 struct type *builtin_type_f_real_s16;
  45 struct type *builtin_type_f_complex_s8;
  46 struct type *builtin_type_f_complex_s16;
  47 struct type *builtin_type_f_complex_s32;
  48 struct type *builtin_type_f_void;
  49
  50 /* Following is dubious stuff that had been in the xcoff reader. */
  51
  52 struct saved_fcn
  53   {
  54     long line_offset;           /* Line offset for function */
  55     struct saved_fcn *next;
  56   };
  57
  58
  59 struct saved_bf_symnum
  60   {
  61     long symnum_fcn;            /* Symnum of function (i.e. .function directive) */
  62     long symnum_bf;             /* Symnum of .bf for this function */
  63     struct saved_bf_symnum *next;
  64   };
  65
  66 typedef struct saved_fcn SAVED_FUNCTION, *SAVED_FUNCTION_PTR;
  67 typedef struct saved_bf_symnum SAVED_BF, *SAVED_BF_PTR;
  68
  69 /* Local functions */
  70
  71 extern void _initialize_f_language (void);
  72 #if 0
  73 static void clear_function_list (void);
  74 static long get_bf_for_fcn (long);
  75 static void clear_bf_list (void);
  76 static void patch_all_commons_by_name (char *, CORE_ADDR, int);
  77 static SAVED_F77_COMMON_PTR find_first_common_named (char *);
  78 static void add_common_entry (struct symbol *);
  79 static void add_common_block (char *, CORE_ADDR, int, char *);
  80 static SAVED_FUNCTION *allocate_saved_function_node (void);
  81 static SAVED_BF_PTR allocate_saved_bf_node (void);
  82 static COMMON_ENTRY_PTR allocate_common_entry_node (void);
  83 static SAVED_F77_COMMON_PTR allocate_saved_f77_common_node (void);
  84 static void patch_common_entries (SAVED_F77_COMMON_PTR, CORE_ADDR, int);
  85 #endif
  86
  87 static struct type *f_create_fundamental_type (struct objfile *, int);
  88 static void f_printstr (struct ui_file * stream, char *string,
  89                         unsigned int length, int width,
  90                         int force_ellipses);
  91 static void f_printchar (int c, struct ui_file * stream);
  92 static void f_emit_char (int c, struct ui_file * stream, int quoter);
  93
  94 /* Print the character C on STREAM as part of the contents of a literal
  95    string whose delimiter is QUOTER.  Note that that format for printing
  96    characters and strings is language specific.
  97    FIXME:  This is a copy of the same function from c-exp.y.  It should
  98    be replaced with a true F77 version.  */
  99
 100 static void
 101 f_emit_char (c, stream, quoter)
 102      register int c;
 103      struct ui_file *stream;
 104      int quoter;
 105 {
 106   c &= 0xFF;                    /* Avoid sign bit follies */
 107
 108   if (PRINT_LITERAL_FORM (c))
 109     {
 110       if (c == '\\' || c == quoter)
 111         fputs_filtered ("\\", stream);
 112       fprintf_filtered (stream, "%c", c);
 113     }
 114   else
 115     {
 116       switch (c)
 117         {
 118         case '\n':
 119           fputs_filtered ("\\n", stream);
 120           break;
 121         case '\b':
 122           fputs_filtered ("\\b", stream);
 123           break;
 124         case '\t':
 125           fputs_filtered ("\\t", stream);
 126           break;
 127         case '\f':
 128           fputs_filtered ("\\f", stream);
 129           break;
 130         case '\r':
 131           fputs_filtered ("\\r", stream);
 132           break;
 133         case '\033':
 134           fputs_filtered ("\\e", stream);
 135           break;
 136         case '\007':
 137           fputs_filtered ("\\a", stream);
 138           break;
 139         default:
 140           fprintf_filtered (stream, "\\%.3o", (unsigned int) c);
 141           break;
 142         }
 143     }
 144 }
 145
 146 /* FIXME:  This is a copy of the same function from c-exp.y.  It should
 147    be replaced with a true F77version. */
 148
 149 static void
 150 f_printchar (c, stream)
 151      int c;
 152      struct ui_file *stream;
 153 {
 154   fputs_filtered ("'", stream);
 155   LA_EMIT_CHAR (c, stream, '\'');
 156   fputs_filtered ("'", stream);
 157 }
 158
 159 /* Print the character string STRING, printing at most LENGTH characters.
 160    Printing stops early if the number hits print_max; repeat counts
 161    are printed as appropriate.  Print ellipses at the end if we
 162    had to stop before printing LENGTH characters, or if FORCE_ELLIPSES.
 163    FIXME:  This is a copy of the same function from c-exp.y.  It should
 164    be replaced with a true F77 version. */
 165
 166 static void
 167 f_printstr (stream, string, length, width, force_ellipses)
 168      struct ui_file *stream;
 169      char *string;
 170      unsigned int length;
 171      int width;
 172      int force_ellipses;
 173 {
 174   register unsigned int i;
 175   unsigned int things_printed = 0;
 176   int in_quotes = 0;
 177   int need_comma = 0;
 178   extern int inspect_it;
 179
 180   if (length == 0)
 181     {
 182       fputs_filtered ("''", gdb_stdout);
 183       return;
 184     }
 185
 186   for (i = 0; i < length && things_printed < print_max; ++i)
 187     {
 188       /* Position of the character we are examining
 189          to see whether it is repeated.  */
 190       unsigned int rep1;
 191       /* Number of repetitions we have detected so far.  */
 192       unsigned int reps;
 193
 194       QUIT;
 195
 196       if (need_comma)
 197         {
 198           fputs_filtered (", ", stream);
 199           need_comma = 0;
 200         }
 201
 202       rep1 = i + 1;
 203       reps = 1;
 204       while (rep1 < length && string[rep1] == string[i])
 205         {
 206           ++rep1;
 207           ++reps;
 208         }
 209
 210       if (reps > repeat_count_threshold)
 211         {
 212           if (in_quotes)
 213             {
 214               if (inspect_it)
 215                 fputs_filtered ("\\', ", stream);
 216               else
 217                 fputs_filtered ("', ", stream);
 218               in_quotes = 0;
 219             }
 220           f_printchar (string[i], stream);
 221           fprintf_filtered (stream, " <repeats %u times>", reps);
 222           i = rep1 - 1;
 223           things_printed += repeat_count_threshold;
 224           need_comma = 1;
 225         }
 226       else
 227         {
 228           if (!in_quotes)
 229             {
 230               if (inspect_it)
 231                 fputs_filtered ("\\'", stream);
 232               else
 233                 fputs_filtered ("'", stream);
 234               in_quotes = 1;
 235             }
 236           LA_EMIT_CHAR (string[i], stream, '"');
 237           ++things_printed;
 238         }
 239     }
 240
 241   /* Terminate the quotes if necessary.  */
 242   if (in_quotes)
 243     {
 244       if (inspect_it)
 245         fputs_filtered ("\\'", stream);
 246       else
 247         fputs_filtered ("'", stream);
 248     }
 249
 250   if (force_ellipses || i < length)
 251     fputs_filtered ("...", stream);
 252 }
 253
 254 /* FIXME:  This is a copy of c_create_fundamental_type(), before
 255    all the non-C types were stripped from it.  Needs to be fixed
 256    by an experienced F77 programmer. */
 257
 258 static struct type *
 259 f_create_fundamental_type (objfile, typeid)
 260      struct objfile *objfile;
 261      int typeid;
 262 {
 263   register struct type *type = NULL;
 264
 265   switch (typeid)
 266     {
 267     case FT_VOID:
 268       type = init_type (TYPE_CODE_VOID,
 269                         TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 270                         0, "VOID", objfile);
 271       break;
 272     case FT_BOOLEAN:
 273       type = init_type (TYPE_CODE_BOOL,
 274                         TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 275                         TYPE_FLAG_UNSIGNED, "boolean", objfile);
 276       break;
 277     case FT_STRING:
 278       type = init_type (TYPE_CODE_STRING,
 279                         TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 280                         0, "string", objfile);
 281       break;
 282     case FT_CHAR:
 283       type = init_type (TYPE_CODE_INT,
 284                         TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 285                         0, "character", objfile);
 286       break;
 287     case FT_SIGNED_CHAR:
 288       type = init_type (TYPE_CODE_INT,
 289                         TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 290                         0, "integer*1", objfile);
 291       break;
 292     case FT_UNSIGNED_CHAR:
 293       type = init_type (TYPE_CODE_BOOL,
 294                         TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 295                         TYPE_FLAG_UNSIGNED, "logical*1", objfile);
 296       break;
 297     case FT_SHORT:
 298       type = init_type (TYPE_CODE_INT,
 299                         TARGET_SHORT_BIT / TARGET_CHAR_BIT,
 300                         0, "integer*2", objfile);
 301       break;
 302     case FT_SIGNED_SHORT:
 303       type = init_type (TYPE_CODE_INT,
 304                         TARGET_SHORT_BIT / TARGET_CHAR_BIT,
 305                         0, "short", objfile);   /* FIXME-fnf */
 306       break;
 307     case FT_UNSIGNED_SHORT:
 308       type = init_type (TYPE_CODE_BOOL,
 309                         TARGET_SHORT_BIT / TARGET_CHAR_BIT,
 310                         TYPE_FLAG_UNSIGNED, "logical*2", objfile);
 311       break;
 312     case FT_INTEGER:
 313       type = init_type (TYPE_CODE_INT,
 314                         TARGET_INT_BIT / TARGET_CHAR_BIT,
 315                         0, "integer*4", objfile);
 316       break;
 317     case FT_SIGNED_INTEGER:
 318       type = init_type (TYPE_CODE_INT,
 319                         TARGET_INT_BIT / TARGET_CHAR_BIT,
 320                         0, "integer", objfile);         /* FIXME -fnf */
 321       break;
 322     case FT_UNSIGNED_INTEGER:
 323       type = init_type (TYPE_CODE_BOOL,
 324                         TARGET_INT_BIT / TARGET_CHAR_BIT,
 325                         TYPE_FLAG_UNSIGNED, "logical*4", objfile);
 326       break;
 327     case FT_FIXED_DECIMAL:
 328       type = init_type (TYPE_CODE_INT,
 329                         TARGET_INT_BIT / TARGET_CHAR_BIT,
 330                         0, "fixed decimal", objfile);
 331       break;
 332     case FT_LONG:
 333       type = init_type (TYPE_CODE_INT,
 334                         TARGET_LONG_BIT / TARGET_CHAR_BIT,
 335                         0, "long", objfile);
 336       break;
 337     case FT_SIGNED_LONG:
 338       type = init_type (TYPE_CODE_INT,
 339                         TARGET_LONG_BIT / TARGET_CHAR_BIT,
 340                         0, "long", objfile);    /* FIXME -fnf */
 341       break;
 342     case FT_UNSIGNED_LONG:
 343       type = init_type (TYPE_CODE_INT,
 344                         TARGET_LONG_BIT / TARGET_CHAR_BIT,
 345                         TYPE_FLAG_UNSIGNED, "unsigned long", objfile);
 346       break;
 347     case FT_LONG_LONG:
 348       type = init_type (TYPE_CODE_INT,
 349                         TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
 350                         0, "long long", objfile);
 351       break;
 352     case FT_SIGNED_LONG_LONG:
 353       type = init_type (TYPE_CODE_INT,
 354                         TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
 355                         0, "signed long long", objfile);
 356       break;
 357     case FT_UNSIGNED_LONG_LONG:
 358       type = init_type (TYPE_CODE_INT,
 359                         TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
 360                         TYPE_FLAG_UNSIGNED, "unsigned long long", objfile);
 361       break;
 362     case FT_FLOAT:
 363       type = init_type (TYPE_CODE_FLT,
 364                         TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
 365                         0, "real", objfile);
 366       break;
 367     case FT_DBL_PREC_FLOAT:
 368       type = init_type (TYPE_CODE_FLT,
 369                         TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
 370                         0, "real*8", objfile);
 371       break;
 372     case FT_FLOAT_DECIMAL:
 373       type = init_type (TYPE_CODE_FLT,
 374                         TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
 375                         0, "floating decimal", objfile);
 376       break;
 377     case FT_EXT_PREC_FLOAT:
 378       type = init_type (TYPE_CODE_FLT,
 379                         TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
 380                         0, "real*16", objfile);
 381       break;
 382     case FT_COMPLEX:
 383       type = init_type (TYPE_CODE_COMPLEX,
 384                         2 * TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
 385                         0, "complex*8", objfile);
 386       TYPE_TARGET_TYPE (type) = builtin_type_f_real;
 387       break;
 388     case FT_DBL_PREC_COMPLEX:
 389       type = init_type (TYPE_CODE_COMPLEX,
 390                         2 * TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
 391                         0, "complex*16", objfile);
 392       TYPE_TARGET_TYPE (type) = builtin_type_f_real_s8;
 393       break;
 394     case FT_EXT_PREC_COMPLEX:
 395       type = init_type (TYPE_CODE_COMPLEX,
 396                         2 * TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
 397                         0, "complex*32", objfile);
 398       TYPE_TARGET_TYPE (type) = builtin_type_f_real_s16;
 399       break;
 400     default:
 401       /* FIXME:  For now, if we are asked to produce a type not in this
 402          language, create the equivalent of a C integer type with the
 403          name "<?type?>".  When all the dust settles from the type
 404          reconstruction work, this should probably become an error. */
 405       type = init_type (TYPE_CODE_INT,
 406                         TARGET_INT_BIT / TARGET_CHAR_BIT,
 407                         0, "<?type?>", objfile);
 408       warning ("internal error: no F77 fundamental type %d", typeid);
 409       break;
 410     }
 411   return (type);
 412 }
 413 \f
 414
 415 /* Table of operators and their precedences for printing expressions.  */
 416
 417 static const struct op_print f_op_print_tab[] =
 418 {
 419   {"+", BINOP_ADD, PREC_ADD, 0},
 420   {"+", UNOP_PLUS, PREC_PREFIX, 0},
 421   {"-", BINOP_SUB, PREC_ADD, 0},
 422   {"-", UNOP_NEG, PREC_PREFIX, 0},
 423   {"*", BINOP_MUL, PREC_MUL, 0},
 424   {"/", BINOP_DIV, PREC_MUL, 0},
 425   {"DIV", BINOP_INTDIV, PREC_MUL, 0},
 426   {"MOD", BINOP_REM, PREC_MUL, 0},
 427   {"=", BINOP_ASSIGN, PREC_ASSIGN, 1},
 428   {".OR.", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
 429   {".AND.", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
 430   {".NOT.", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
 431   {".EQ.", BINOP_EQUAL, PREC_EQUAL, 0},
 432   {".NE.", BINOP_NOTEQUAL, PREC_EQUAL, 0},
 433   {".LE.", BINOP_LEQ, PREC_ORDER, 0},
 434   {".GE.", BINOP_GEQ, PREC_ORDER, 0},
 435   {".GT.", BINOP_GTR, PREC_ORDER, 0},
 436   {".LT.", BINOP_LESS, PREC_ORDER, 0},
 437   {"**", UNOP_IND, PREC_PREFIX, 0},
 438   {"@", BINOP_REPEAT, PREC_REPEAT, 0},
 439   {NULL, 0, 0, 0}
 440 };
 441 \f
 442 struct type **CONST_PTR (f_builtin_types[]) =
 443 {
 444   &builtin_type_f_character,
 445     &builtin_type_f_logical,
 446     &builtin_type_f_logical_s1,
 447     &builtin_type_f_logical_s2,
 448     &builtin_type_f_integer,
 449     &builtin_type_f_integer_s2,
 450     &builtin_type_f_real,
 451     &builtin_type_f_real_s8,
 452     &builtin_type_f_real_s16,
 453     &builtin_type_f_complex_s8,
 454     &builtin_type_f_complex_s16,
 455 #if 0
 456     &builtin_type_f_complex_s32,
 457 #endif
 458     &builtin_type_f_void,
 459     0
 460 };
 461
 462 /* This is declared in c-lang.h but it is silly to import that file for what
 463    is already just a hack. */
 464 extern int c_value_print (struct value *, struct ui_file *, int,
 465                           enum val_prettyprint);
 466
 467 const struct language_defn f_language_defn =
 468 {
 469   "fortran",
 470   language_fortran,
 471   f_builtin_types,
 472   range_check_on,
 473   type_check_on,
 474   f_parse,                      /* parser */
 475   f_error,                      /* parser error function */
 476   evaluate_subexp_standard,
 477   f_printchar,                  /* Print character constant */
 478   f_printstr,                   /* function to print string constant */
 479   f_emit_char,                  /* Function to print a single character */
 480   f_create_fundamental_type,    /* Create fundamental type in this language */
 481   f_print_type,                 /* Print a type using appropriate syntax */
 482   f_val_print,                  /* Print a value using appropriate syntax */
 483   c_value_print,                /* FIXME */
 484   {"", "", "", ""},             /* Binary format info */
 485   {"0%o", "0", "o", ""},        /* Octal format info */
 486   {"%d", "", "d", ""},          /* Decimal format info */
 487   {"0x%x", "0x", "x", ""},      /* Hex format info */
 488   f_op_print_tab,               /* expression operators for printing */
 489   0,                            /* arrays are first-class (not c-style) */
 490   1,                            /* String lower bound */
 491   &builtin_type_f_character,    /* Type of string elements */
 492   LANG_MAGIC
 493 };
 494
 495 void
 496 _initialize_f_language ()
 497 {
 498   builtin_type_f_void =
 499     init_type (TYPE_CODE_VOID, 1,
 500                0,
 501                "VOID", (struct objfile *) NULL);
 502
 503   builtin_type_f_character =
 504     init_type (TYPE_CODE_INT, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 505                0,
 506                "character", (struct objfile *) NULL);
 507
 508   builtin_type_f_logical_s1 =
 509     init_type (TYPE_CODE_BOOL, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 510                TYPE_FLAG_UNSIGNED,
 511                "logical*1", (struct objfile *) NULL);
 512
 513   builtin_type_f_integer_s2 =
 514     init_type (TYPE_CODE_INT, TARGET_SHORT_BIT / TARGET_CHAR_BIT,
 515                0,
 516                "integer*2", (struct objfile *) NULL);
 517
 518   builtin_type_f_logical_s2 =
 519     init_type (TYPE_CODE_BOOL, TARGET_SHORT_BIT / TARGET_CHAR_BIT,
 520                TYPE_FLAG_UNSIGNED,
 521                "logical*2", (struct objfile *) NULL);
 522
 523   builtin_type_f_integer =
 524     init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT,
 525                0,
 526                "integer", (struct objfile *) NULL);
 527
 528   builtin_type_f_logical =
 529     init_type (TYPE_CODE_BOOL, TARGET_INT_BIT / TARGET_CHAR_BIT,
 530                TYPE_FLAG_UNSIGNED,
 531                "logical*4", (struct objfile *) NULL);
 532
 533   builtin_type_f_real =
 534     init_type (TYPE_CODE_FLT, TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
 535                0,
 536                "real", (struct objfile *) NULL);
 537
 538   builtin_type_f_real_s8 =
 539     init_type (TYPE_CODE_FLT, TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
 540                0,
 541                "real*8", (struct objfile *) NULL);
 542
 543   builtin_type_f_real_s16 =
 544     init_type (TYPE_CODE_FLT, TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
 545                0,
 546                "real*16", (struct objfile *) NULL);
 547
 548   builtin_type_f_complex_s8 =
 549     init_type (TYPE_CODE_COMPLEX, 2 * TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
 550                0,
 551                "complex*8", (struct objfile *) NULL);
 552   TYPE_TARGET_TYPE (builtin_type_f_complex_s8) = builtin_type_f_real;
 553
 554   builtin_type_f_complex_s16 =
 555     init_type (TYPE_CODE_COMPLEX, 2 * TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
 556                0,
 557                "complex*16", (struct objfile *) NULL);
 558   TYPE_TARGET_TYPE (builtin_type_f_complex_s16) = builtin_type_f_real_s8;
 559
 560   /* We have a new size == 4 double floats for the
 561      complex*32 data type */
 562
 563   builtin_type_f_complex_s32 =
 564     init_type (TYPE_CODE_COMPLEX, 2 * TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
 565                0,
 566                "complex*32", (struct objfile *) NULL);
 567   TYPE_TARGET_TYPE (builtin_type_f_complex_s32) = builtin_type_f_real_s16;
 568
 569   builtin_type_string =
 570     init_type (TYPE_CODE_STRING, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 571                0,
 572                "character string", (struct objfile *) NULL);
 573
 574   add_language (&f_language_defn);
 575 }
 576
 577 #if 0
 578 static SAVED_BF_PTR
 579 allocate_saved_bf_node ()
 580 {
 581   SAVED_BF_PTR new;
 582
 583   new = (SAVED_BF_PTR) xmalloc (sizeof (SAVED_BF));
 584   return (new);
 585 }
 586
 587 static SAVED_FUNCTION *
 588 allocate_saved_function_node ()
 589 {
 590   SAVED_FUNCTION *new;
 591
 592   new = (SAVED_FUNCTION *) xmalloc (sizeof (SAVED_FUNCTION));
 593   return (new);
 594 }
 595
 596 static SAVED_F77_COMMON_PTR
 597 allocate_saved_f77_common_node ()
 598 {
 599   SAVED_F77_COMMON_PTR new;
 600
 601   new = (SAVED_F77_COMMON_PTR) xmalloc (sizeof (SAVED_F77_COMMON));
 602   return (new);
 603 }
 604
 605 static COMMON_ENTRY_PTR
 606 allocate_common_entry_node ()
 607 {
 608   COMMON_ENTRY_PTR new;
 609
 610   new = (COMMON_ENTRY_PTR) xmalloc (sizeof (COMMON_ENTRY));
 611   return (new);
 612 }
 613 #endif
 614
 615 SAVED_F77_COMMON_PTR head_common_list = NULL;   /* Ptr to 1st saved COMMON  */
 616 SAVED_F77_COMMON_PTR tail_common_list = NULL;   /* Ptr to last saved COMMON  */
 617 SAVED_F77_COMMON_PTR current_common = NULL;     /* Ptr to current COMMON */
 618
 619 #if 0
 620 static SAVED_BF_PTR saved_bf_list = NULL;       /* Ptr to (.bf,function)
 621                                                    list */
 622 static SAVED_BF_PTR saved_bf_list_end = NULL;   /* Ptr to above list's end */
 623 static SAVED_BF_PTR current_head_bf_list = NULL;        /* Current head of above list
 624                                                          */
 625
 626 static SAVED_BF_PTR tmp_bf_ptr; /* Generic temporary for use
 627                                    in macros */
 628
 629 /* The following function simply enters a given common block onto
 630    the global common block chain */
 631
 632 static void
 633 add_common_block (name, offset, secnum, func_stab)
 634      char *name;
 635      CORE_ADDR offset;
 636      int secnum;
 637      char *func_stab;
 638 {
 639   SAVED_F77_COMMON_PTR tmp;
 640   char *c, *local_copy_func_stab;
 641
 642   /* If the COMMON block we are trying to add has a blank
 643      name (i.e. "#BLNK_COM") then we set it to __BLANK
 644      because the darn "#" character makes GDB's input
 645      parser have fits. */
 646
 647
 648   if (STREQ (name, BLANK_COMMON_NAME_ORIGINAL) ||
 649       STREQ (name, BLANK_COMMON_NAME_MF77))
 650     {
 651
 652       free (name);
 653       name = alloca (strlen (BLANK_COMMON_NAME_LOCAL) + 1);
 654       strcpy (name, BLANK_COMMON_NAME_LOCAL);
 655     }
 656
 657   tmp = allocate_saved_f77_common_node ();
 658
 659   local_copy_func_stab = xmalloc (strlen (func_stab) + 1);
 660   strcpy (local_copy_func_stab, func_stab);
 661
 662   tmp->name = xmalloc (strlen (name) + 1);
 663
 664   /* local_copy_func_stab is a stabstring, let us first extract the
 665      function name from the stab by NULLing out the ':' character. */
 666
 667
 668   c = NULL;
 669   c = strchr (local_copy_func_stab, ':');
 670
 671   if (c)
 672     *c = '\0';
 673   else
 674     error ("Malformed function STAB found in add_common_block()");
 675
 676
 677   tmp->owning_function = xmalloc (strlen (local_copy_func_stab) + 1);
 678
 679   strcpy (tmp->owning_function, local_copy_func_stab);
 680
 681   strcpy (tmp->name, name);
 682   tmp->offset = offset;
 683   tmp->next = NULL;
 684   tmp->entries = NULL;
 685   tmp->secnum = secnum;
 686
 687   current_common = tmp;
 688
 689   if (head_common_list == NULL)
 690     {
 691       head_common_list = tail_common_list = tmp;
 692     }
 693   else
 694     {
 695       tail_common_list->next = tmp;
 696       tail_common_list = tmp;
 697     }
 698 }
 699 #endif
 700
 701 /* The following function simply enters a given common entry onto
 702    the "current_common" block that has been saved away. */
 703
 704 #if 0
 705 static void
 706 add_common_entry (entry_sym_ptr)
 707      struct symbol *entry_sym_ptr;
 708 {
 709   COMMON_ENTRY_PTR tmp;
 710
 711
 712
 713   /* The order of this list is important, since
 714      we expect the entries to appear in decl.
 715      order when we later issue "info common" calls */
 716
 717   tmp = allocate_common_entry_node ();
 718
 719   tmp->next = NULL;
 720   tmp->symbol = entry_sym_ptr;
 721
 722   if (current_common == NULL)
 723     error ("Attempt to add COMMON entry with no block open!");
 724   else
 725     {
 726       if (current_common->entries == NULL)
 727         {
 728           current_common->entries = tmp;
 729           current_common->end_of_entries = tmp;
 730         }
 731       else
 732         {
 733           current_common->end_of_entries->next = tmp;
 734           current_common->end_of_entries = tmp;
 735         }
 736     }
 737 }
 738 #endif
 739
 740 /* This routine finds the first encountred COMMON block named "name" */
 741
 742 #if 0
 743 static SAVED_F77_COMMON_PTR
 744 find_first_common_named (name)
 745      char *name;
 746 {
 747
 748   SAVED_F77_COMMON_PTR tmp;
 749
 750   tmp = head_common_list;
 751
 752   while (tmp != NULL)
 753     {
 754       if (STREQ (tmp->name, name))
 755         return (tmp);
 756       else
 757         tmp = tmp->next;
 758     }
 759   return (NULL);
 760 }
 761 #endif
 762
 763 /* This routine finds the first encountred COMMON block named "name"
 764    that belongs to function funcname */
 765
 766 SAVED_F77_COMMON_PTR
 767 find_common_for_function (name, funcname)
 768      char *name;
 769      char *funcname;
 770 {
 771
 772   SAVED_F77_COMMON_PTR tmp;
 773
 774   tmp = head_common_list;
 775
 776   while (tmp != NULL)
 777     {
 778       if (STREQ (tmp->name, name) && STREQ (tmp->owning_function, funcname))
 779         return (tmp);
 780       else
 781         tmp = tmp->next;
 782     }
 783   return (NULL);
 784 }
 785
 786
 787 #if 0
 788
 789 /* The following function is called to patch up the offsets
 790    for the statics contained in the COMMON block named
 791    "name."  */
 792
 793 static void
 794 patch_common_entries (blk, offset, secnum)
 795      SAVED_F77_COMMON_PTR blk;
 796      CORE_ADDR offset;
 797      int secnum;
 798 {
 799   COMMON_ENTRY_PTR entry;
 800
 801   blk->offset = offset;         /* Keep this around for future use. */
 802
 803   entry = blk->entries;
 804
 805   while (entry != NULL)
 806     {
 807       SYMBOL_VALUE (entry->symbol) += offset;
 808       SYMBOL_SECTION (entry->symbol) = secnum;
 809
 810       entry = entry->next;
 811     }
 812   blk->secnum = secnum;
 813 }
 814
 815 /* Patch all commons named "name" that need patching.Since COMMON
 816    blocks occur with relative infrequency, we simply do a linear scan on
 817    the name.  Eventually, the best way to do this will be a
 818    hashed-lookup.  Secnum is the section number for the .bss section
 819    (which is where common data lives). */
 820
 821 static void
 822 patch_all_commons_by_name (name, offset, secnum)
 823      char *name;
 824      CORE_ADDR offset;
 825      int secnum;
 826 {
 827
 828   SAVED_F77_COMMON_PTR tmp;
 829
 830   /* For blank common blocks, change the canonical reprsentation
 831      of a blank name */
 832
 833   if ((STREQ (name, BLANK_COMMON_NAME_ORIGINAL)) ||
 834       (STREQ (name, BLANK_COMMON_NAME_MF77)))
 835     {
 836       free (name);
 837       name = alloca (strlen (BLANK_COMMON_NAME_LOCAL) + 1);
 838       strcpy (name, BLANK_COMMON_NAME_LOCAL);
 839     }
 840
 841   tmp = head_common_list;
 842
 843   while (tmp != NULL)
 844     {
 845       if (COMMON_NEEDS_PATCHING (tmp))
 846         if (STREQ (tmp->name, name))
 847           patch_common_entries (tmp, offset, secnum);
 848
 849       tmp = tmp->next;
 850     }
 851 }
 852 #endif
 853
 854 /* This macro adds the symbol-number for the start of the function
 855    (the symbol number of the .bf) referenced by symnum_fcn to a
 856    list.  This list, in reality should be a FIFO queue but since
 857    #line pragmas sometimes cause line ranges to get messed up
 858    we simply create a linear list.  This list can then be searched
 859    first by a queueing algorithm and upon failure fall back to
 860    a linear scan. */
 861
 862 #if 0
 863 #define ADD_BF_SYMNUM(bf_sym,fcn_sym) \
 864   \
 865   if (saved_bf_list == NULL) \
 866 { \
 867     tmp_bf_ptr = allocate_saved_bf_node(); \
 868       \
 869         tmp_bf_ptr->symnum_bf = (bf_sym); \
 870           tmp_bf_ptr->symnum_fcn = (fcn_sym);  \
 871             tmp_bf_ptr->next = NULL; \
 872               \
 873                 current_head_bf_list = saved_bf_list = tmp_bf_ptr; \
 874                   saved_bf_list_end = tmp_bf_ptr; \
 875                   } \
 876 else \
 877 {  \
 878      tmp_bf_ptr = allocate_saved_bf_node(); \
 879        \
 880          tmp_bf_ptr->symnum_bf = (bf_sym);  \
 881            tmp_bf_ptr->symnum_fcn = (fcn_sym);  \
 882              tmp_bf_ptr->next = NULL;  \
 883                \
 884                  saved_bf_list_end->next = tmp_bf_ptr;  \
 885                    saved_bf_list_end = tmp_bf_ptr; \
 886                    }
 887 #endif
 888
 889 /* This function frees the entire (.bf,function) list */
 890
 891 #if 0
 892 static void
 893 clear_bf_list ()
 894 {
 895
 896   SAVED_BF_PTR tmp = saved_bf_list;
 897   SAVED_BF_PTR next = NULL;
 898
 899   while (tmp != NULL)
 900     {
 901       next = tmp->next;
 902       free (tmp);
 903       tmp = next;
 904     }
 905   saved_bf_list = NULL;
 906 }
 907 #endif
 908
 909 int global_remote_debug;
 910
 911 #if 0
 912
 913 static long
 914 get_bf_for_fcn (the_function)
 915      long the_function;
 916 {
 917   SAVED_BF_PTR tmp;
 918   int nprobes = 0;
 919
 920   /* First use a simple queuing algorithm (i.e. look and see if the
 921      item at the head of the queue is the one you want)  */
 922
 923   if (saved_bf_list == NULL)
 924     internal_error ("cannot get .bf node off empty list");
 925
 926   if (current_head_bf_list != NULL)
 927     if (current_head_bf_list->symnum_fcn == the_function)
 928       {
 929         if (global_remote_debug)
 930           fprintf (stderr, "*");
 931
 932         tmp = current_head_bf_list;
 933         current_head_bf_list = current_head_bf_list->next;
 934         return (tmp->symnum_bf);
 935       }
 936
 937   /* If the above did not work (probably because #line directives were
 938      used in the sourcefile and they messed up our internal tables) we now do
 939      the ugly linear scan */
 940
 941   if (global_remote_debug)
 942     fprintf (stderr, "\ndefaulting to linear scan\n");
 943
 944   nprobes = 0;
 945   tmp = saved_bf_list;
 946   while (tmp != NULL)
 947     {
 948       nprobes++;
 949       if (tmp->symnum_fcn == the_function)
 950         {
 951           if (global_remote_debug)
 952             fprintf (stderr, "Found in %d probes\n", nprobes);
 953           current_head_bf_list = tmp->next;
 954           return (tmp->symnum_bf);
 955         }
 956       tmp = tmp->next;
 957     }
 958
 959   return (-1);
 960 }
 961
 962 static SAVED_FUNCTION_PTR saved_function_list = NULL;
 963 static SAVED_FUNCTION_PTR saved_function_list_end = NULL;
 964
 965 static void
 966 clear_function_list ()
 967 {
 968   SAVED_FUNCTION_PTR tmp = saved_function_list;
 969   SAVED_FUNCTION_PTR next = NULL;
 970
 971   while (tmp != NULL)
 972     {
 973       next = tmp->next;
 974       free (tmp);
 975       tmp = next;
 976     }
 977
 978   saved_function_list = NULL;
 979 }
 980 #endif