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