gdb/f-lang.c

   1 /* Fortran language support routines for GDB, the GNU debugger.
   2    Copyright 1993, 1994 Free Software Foundation, Inc.
   3    Contributed by Motorola.  Adapted from the C parser by Farooq Butt
   4    (fmbutt@engage.sps.mot.com).
   5
   6 This file is part of GDB.
   7
   8 This program is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 2 of the License, or
  11 (at your option) any later version.
  12
  13 This program is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with this program; if not, write to the Free Software
  20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  21
  22 #include "defs.h"
  23 #include <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 /* Print the character C on STREAM as part of the contents of a literal
  49    string whose delimiter is QUOTER.  Note that that format for printing
  50    characters and strings is language specific.
  51    FIXME:  This is a copy of the same function from c-exp.y.  It should
  52    be replaced with a true F77 version.  */
  53
  54 static void
  55 emit_char (c, stream, quoter)
  56      register int c;
  57      FILE *stream;
  58      int quoter;
  59 {
  60   c &= 0xFF;                    /* Avoid sign bit follies */
  61
  62   if (PRINT_LITERAL_FORM (c))
  63     {
  64       if (c == '\\' || c == quoter)
  65         fputs_filtered ("\\", stream);
  66       fprintf_filtered (stream, "%c", c);
  67     }
  68   else
  69     {
  70       switch (c)
  71         {
  72         case '\n':
  73           fputs_filtered ("\\n", stream);
  74           break;
  75         case '\b':
  76           fputs_filtered ("\\b", stream);
  77           break;
  78         case '\t':
  79           fputs_filtered ("\\t", stream);
  80           break;
  81         case '\f':
  82           fputs_filtered ("\\f", stream);
  83           break;
  84         case '\r':
  85           fputs_filtered ("\\r", stream);
  86           break;
  87         case '\033':
  88           fputs_filtered ("\\e", stream);
  89           break;
  90         case '\007':
  91           fputs_filtered ("\\a", stream);
  92           break;
  93         default:
  94           fprintf_filtered (stream, "\\%.3o", (unsigned int) c);
  95           break;
  96         }
  97     }
  98 }
  99
 100 /* FIXME:  This is a copy of the same function from c-exp.y.  It should
 101    be replaced with a true F77version. */
 102
 103 static void
 104 f_printchar (c, stream)
 105      int c;
 106      FILE *stream;
 107 {
 108   fputs_filtered ("'", stream);
 109   emit_char (c, stream, '\'');
 110   fputs_filtered ("'", stream);
 111 }
 112
 113 /* Print the character string STRING, printing at most LENGTH characters.
 114    Printing stops early if the number hits print_max; repeat counts
 115    are printed as appropriate.  Print ellipses at the end if we
 116    had to stop before printing LENGTH characters, or if FORCE_ELLIPSES.
 117    FIXME:  This is a copy of the same function from c-exp.y.  It should
 118    be replaced with a true F77 version. */
 119
 120 static void
 121 f_printstr (stream, string, length, force_ellipses)
 122      FILE *stream;
 123      char *string;
 124      unsigned int length;
 125      int force_ellipses;
 126 {
 127   register unsigned int i;
 128   unsigned int things_printed = 0;
 129   int in_quotes = 0;
 130   int need_comma = 0;
 131   extern int inspect_it;
 132   extern int repeat_count_threshold;
 133   extern int print_max;
 134
 135   if (length == 0)
 136     {
 137       fputs_filtered ("''", stdout);
 138       return;
 139     }
 140
 141   for (i = 0; i < length && things_printed < print_max; ++i)
 142     {
 143       /* Position of the character we are examining
 144          to see whether it is repeated.  */
 145       unsigned int rep1;
 146       /* Number of repetitions we have detected so far.  */
 147       unsigned int reps;
 148
 149       QUIT;
 150
 151       if (need_comma)
 152         {
 153           fputs_filtered (", ", stream);
 154           need_comma = 0;
 155         }
 156
 157       rep1 = i + 1;
 158       reps = 1;
 159       while (rep1 < length && string[rep1] == string[i])
 160         {
 161           ++rep1;
 162           ++reps;
 163         }
 164
 165       if (reps > repeat_count_threshold)
 166         {
 167           if (in_quotes)
 168             {
 169               if (inspect_it)
 170                 fputs_filtered ("\\', ", stream);
 171               else
 172                 fputs_filtered ("', ", stream);
 173               in_quotes = 0;
 174             }
 175           f_printchar (string[i], stream);
 176           fprintf_filtered (stream, " <repeats %u times>", reps);
 177           i = rep1 - 1;
 178           things_printed += repeat_count_threshold;
 179           need_comma = 1;
 180         }
 181       else
 182         {
 183           if (!in_quotes)
 184             {
 185               if (inspect_it)
 186                 fputs_filtered ("\\'", stream);
 187               else
 188                 fputs_filtered ("'", stream);
 189               in_quotes = 1;
 190             }
 191           emit_char (string[i], stream, '"');
 192           ++things_printed;
 193         }
 194     }
 195
 196   /* Terminate the quotes if necessary.  */
 197   if (in_quotes)
 198     {
 199       if (inspect_it)
 200         fputs_filtered ("\\'", stream);
 201       else
 202         fputs_filtered ("'", stream);
 203     }
 204
 205   if (force_ellipses || i < length)
 206     fputs_filtered ("...", stream);
 207 }
 208
 209 /* FIXME:  This is a copy of c_create_fundamental_type(), before
 210    all the non-C types were stripped from it.  Needs to be fixed
 211    by an experienced F77 programmer. */
 212
 213 static struct type *
 214 f_create_fundamental_type (objfile, typeid)
 215      struct objfile *objfile;
 216      int typeid;
 217 {
 218   register struct type *type = NULL;
 219
 220   switch (typeid)
 221     {
 222     case FT_VOID:
 223       type = init_type (TYPE_CODE_VOID,
 224                         TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 225                         0, "VOID", objfile);
 226       break;
 227     case FT_BOOLEAN:
 228       type = init_type (TYPE_CODE_BOOL,
 229                         TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 230                         TYPE_FLAG_UNSIGNED, "boolean", objfile);
 231       break;
 232     case FT_STRING:
 233       type = init_type (TYPE_CODE_STRING,
 234                         TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 235                         0, "string", objfile);
 236       break;
 237     case FT_CHAR:
 238       type = init_type (TYPE_CODE_INT,
 239                         TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 240                         0, "character", objfile);
 241       break;
 242     case FT_SIGNED_CHAR:
 243       type = init_type (TYPE_CODE_INT,
 244                         TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 245                         0, "integer*1", objfile);
 246       break;
 247     case FT_UNSIGNED_CHAR:
 248       type = init_type (TYPE_CODE_BOOL,
 249                         TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 250                         TYPE_FLAG_UNSIGNED, "logical*1", objfile);
 251       break;
 252     case FT_SHORT:
 253       type = init_type (TYPE_CODE_INT,
 254                         TARGET_SHORT_BIT / TARGET_CHAR_BIT,
 255                         0, "integer*2", objfile);
 256       break;
 257     case FT_SIGNED_SHORT:
 258       type = init_type (TYPE_CODE_INT,
 259                         TARGET_SHORT_BIT / TARGET_CHAR_BIT,
 260                         0, "short", objfile);   /* FIXME-fnf */
 261       break;
 262     case FT_UNSIGNED_SHORT:
 263       type = init_type (TYPE_CODE_BOOL,
 264                         TARGET_SHORT_BIT / TARGET_CHAR_BIT,
 265                         TYPE_FLAG_UNSIGNED, "logical*2", objfile);
 266       break;
 267     case FT_INTEGER:
 268       type = init_type (TYPE_CODE_INT,
 269                         TARGET_INT_BIT / TARGET_CHAR_BIT,
 270                         0, "integer*4", objfile);
 271       break;
 272     case FT_SIGNED_INTEGER:
 273       type = init_type (TYPE_CODE_INT,
 274                         TARGET_INT_BIT / TARGET_CHAR_BIT,
 275                         0, "integer", objfile); /* FIXME -fnf */
 276       break;
 277     case FT_UNSIGNED_INTEGER:
 278       type = init_type (TYPE_CODE_BOOL,
 279                         TARGET_INT_BIT / TARGET_CHAR_BIT,
 280                         TYPE_FLAG_UNSIGNED, "logical*4", objfile);
 281       break;
 282     case FT_FIXED_DECIMAL:
 283       type = init_type (TYPE_CODE_INT,
 284                         TARGET_INT_BIT / TARGET_CHAR_BIT,
 285                         0, "fixed decimal", objfile);
 286       break;
 287     case FT_LONG:
 288       type = init_type (TYPE_CODE_INT,
 289                         TARGET_LONG_BIT / TARGET_CHAR_BIT,
 290                         0, "long", objfile);
 291       break;
 292     case FT_SIGNED_LONG:
 293       type = init_type (TYPE_CODE_INT,
 294                         TARGET_LONG_BIT / TARGET_CHAR_BIT,
 295                         0, "long", objfile); /* FIXME -fnf */
 296       break;
 297     case FT_UNSIGNED_LONG:
 298       type = init_type (TYPE_CODE_INT,
 299                         TARGET_LONG_BIT / TARGET_CHAR_BIT,
 300                         TYPE_FLAG_UNSIGNED, "unsigned long", objfile);
 301       break;
 302     case FT_LONG_LONG:
 303       type = init_type (TYPE_CODE_INT,
 304                         TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
 305                         0, "long long", objfile);
 306       break;
 307     case FT_SIGNED_LONG_LONG:
 308       type = init_type (TYPE_CODE_INT,
 309                         TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
 310                         0, "signed long long", objfile);
 311       break;
 312     case FT_UNSIGNED_LONG_LONG:
 313       type = init_type (TYPE_CODE_INT,
 314                         TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
 315                         TYPE_FLAG_UNSIGNED, "unsigned long long", objfile);
 316       break;
 317     case FT_FLOAT:
 318       type = init_type (TYPE_CODE_FLT,
 319                         TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
 320                         0, "real", objfile);
 321       break;
 322     case FT_DBL_PREC_FLOAT:
 323       type = init_type (TYPE_CODE_FLT,
 324                         TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
 325                         0, "real*8", objfile);
 326       break;
 327     case FT_FLOAT_DECIMAL:
 328       type = init_type (TYPE_CODE_FLT,
 329                         TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
 330                         0, "floating decimal", objfile);
 331       break;
 332     case FT_EXT_PREC_FLOAT:
 333       type = init_type (TYPE_CODE_FLT,
 334                         TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
 335                         0, "real*16", objfile);
 336       break;
 337     case FT_COMPLEX:
 338       type = init_type (TYPE_CODE_COMPLEX,
 339                         2 * TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
 340                         0, "complex*8", objfile);
 341       TYPE_TARGET_TYPE (type) = builtin_type_f_real;
 342       break;
 343     case FT_DBL_PREC_COMPLEX:
 344       type = init_type (TYPE_CODE_COMPLEX,
 345                         2 * TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
 346                         0, "complex*16", objfile);
 347       TYPE_TARGET_TYPE (type) = builtin_type_f_real_s8;
 348       break;
 349     case FT_EXT_PREC_COMPLEX:
 350       type = init_type (TYPE_CODE_COMPLEX,
 351                         2 * TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
 352                         0, "complex*32", objfile);
 353       TYPE_TARGET_TYPE (type) = builtin_type_f_real_s16;
 354       break;
 355     default:
 356       /* FIXME:  For now, if we are asked to produce a type not in this
 357          language, create the equivalent of a C integer type with the
 358          name "<?type?>".  When all the dust settles from the type
 359          reconstruction work, this should probably become an error. */
 360       type = init_type (TYPE_CODE_INT,
 361                         TARGET_INT_BIT / TARGET_CHAR_BIT,
 362                         0, "<?type?>", objfile);
 363       warning ("internal error: no F77 fundamental type %d", typeid);
 364       break;
 365     }
 366   return (type);
 367 }
 368
 369 \f
 370 /* Table of operators and their precedences for printing expressions.  */
 371
 372 static const struct op_print f_op_print_tab[] = {
 373   { "+",     BINOP_ADD, PREC_ADD, 0 },
 374   { "+",     UNOP_PLUS, PREC_PREFIX, 0 },
 375   { "-",     BINOP_SUB, PREC_ADD, 0 },
 376   { "-",     UNOP_NEG, PREC_PREFIX, 0 },
 377   { "*",     BINOP_MUL, PREC_MUL, 0 },
 378   { "/",     BINOP_DIV, PREC_MUL, 0 },
 379   { "DIV",   BINOP_INTDIV, PREC_MUL, 0 },
 380   { "MOD",   BINOP_REM, PREC_MUL, 0 },
 381   { "=",     BINOP_ASSIGN, PREC_ASSIGN, 1 },
 382   { ".OR.",  BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0 },
 383   { ".AND.", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0 },
 384   { ".NOT.", UNOP_LOGICAL_NOT, PREC_PREFIX, 0 },
 385   { ".EQ.",  BINOP_EQUAL, PREC_EQUAL, 0 },
 386   { ".NE.",  BINOP_NOTEQUAL, PREC_EQUAL, 0 },
 387   { ".LE.",  BINOP_LEQ, PREC_ORDER, 0 },
 388   { ".GE.",  BINOP_GEQ, PREC_ORDER, 0 },
 389   { ".GT.",  BINOP_GTR, PREC_ORDER, 0 },
 390   { ".LT.",  BINOP_LESS, PREC_ORDER, 0 },
 391   { "**",    UNOP_IND, PREC_PREFIX, 0 },
 392   { "@",     BINOP_REPEAT, PREC_REPEAT, 0 },
 393   { NULL,    0, 0, 0 }
 394 };
 395 \f
 396 struct type ** const (f_builtin_types[]) =
 397 {
 398   &builtin_type_f_character,
 399   &builtin_type_f_logical,
 400   &builtin_type_f_logical_s1,
 401   &builtin_type_f_logical_s2,
 402   &builtin_type_f_integer,
 403   &builtin_type_f_integer_s2,
 404   &builtin_type_f_real,
 405   &builtin_type_f_real_s8,
 406   &builtin_type_f_real_s16,
 407   &builtin_type_f_complex_s8,
 408   &builtin_type_f_complex_s16,
 409 #if 0
 410   &builtin_type_f_complex_s32,
 411 #endif
 412   &builtin_type_f_void,
 413   0
 414 };
 415
 416 int c_value_print();
 417
 418 const struct language_defn f_language_defn = {
 419   "fortran",
 420   language_fortran,
 421   f_builtin_types,
 422   range_check_on,
 423   type_check_on,
 424   f_parse,                      /* parser */
 425   f_error,                      /* parser error function */
 426   evaluate_subexp_standard,
 427   f_printchar,                  /* Print character constant */
 428   f_printstr,                   /* function to print string constant */
 429   f_create_fundamental_type,    /* Create fundamental type in this language */
 430   f_print_type,                 /* Print a type using appropriate syntax */
 431   f_val_print,                  /* Print a value using appropriate syntax */
 432   c_value_print,  /* FIXME */
 433   {"",      "",   "",   ""},    /* Binary format info */
 434   {"0%o",  "0",   "o", ""},     /* Octal format info */
 435   {"%d",   "",    "d", ""},     /* Decimal format info */
 436   {"0x%x", "0x",  "x", ""},     /* Hex format info */
 437   f_op_print_tab,               /* expression operators for printing */
 438   0,                            /* arrays are first-class (not c-style) */
 439   1,                            /* String lower bound */
 440   &builtin_type_f_character,    /* Type of string elements */
 441   LANG_MAGIC
 442   };
 443
 444 void
 445 _initialize_f_language ()
 446 {
 447   builtin_type_f_void =
 448     init_type (TYPE_CODE_VOID, 1,
 449                0,
 450                "VOID", (struct objfile *) NULL);
 451
 452   builtin_type_f_character =
 453     init_type (TYPE_CODE_INT, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 454                0,
 455                "character", (struct objfile *) NULL);
 456
 457   builtin_type_f_logical_s1 =
 458     init_type (TYPE_CODE_BOOL, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 459                TYPE_FLAG_UNSIGNED,
 460                "logical*1", (struct objfile *) NULL);
 461
 462   builtin_type_f_integer_s2 =
 463     init_type (TYPE_CODE_INT, TARGET_SHORT_BIT / TARGET_CHAR_BIT,
 464                0,
 465                "integer*2", (struct objfile *) NULL);
 466
 467   builtin_type_f_logical_s2 =
 468     init_type (TYPE_CODE_BOOL, TARGET_SHORT_BIT / TARGET_CHAR_BIT,
 469                TYPE_FLAG_UNSIGNED,
 470                "logical*2", (struct objfile *) NULL);
 471
 472   builtin_type_f_integer =
 473     init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT,
 474                0,
 475                "integer", (struct objfile *) NULL);
 476
 477   builtin_type_f_logical =
 478     init_type (TYPE_CODE_BOOL, TARGET_INT_BIT / TARGET_CHAR_BIT,
 479                TYPE_FLAG_UNSIGNED,
 480                "logical*4", (struct objfile *) NULL);
 481
 482   builtin_type_f_real =
 483     init_type (TYPE_CODE_FLT, TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
 484                0,
 485                "real", (struct objfile *) NULL);
 486
 487   builtin_type_f_real_s8 =
 488     init_type (TYPE_CODE_FLT, TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
 489                0,
 490                "real*8", (struct objfile *) NULL);
 491
 492   builtin_type_f_real_s16 =
 493     init_type (TYPE_CODE_FLT, TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
 494                0,
 495                "real*16", (struct objfile *) NULL);
 496
 497   builtin_type_f_complex_s8 =
 498     init_type (TYPE_CODE_COMPLEX, 2 * TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
 499                0,
 500                "complex*8", (struct objfile *) NULL);
 501   TYPE_TARGET_TYPE (builtin_type_f_complex_s8) = builtin_type_f_real;
 502
 503   builtin_type_f_complex_s16 =
 504     init_type (TYPE_CODE_COMPLEX, 2 * TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
 505                0,
 506                "complex*16", (struct objfile *) NULL);
 507   TYPE_TARGET_TYPE (builtin_type_f_complex_s16) = builtin_type_f_real_s8;
 508
 509   /* We have a new size == 4 double floats for the
 510      complex*32 data type */
 511
 512   builtin_type_f_complex_s32 =
 513     init_type (TYPE_CODE_COMPLEX, 2 * TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
 514                0,
 515                "complex*32", (struct objfile *) NULL);
 516   TYPE_TARGET_TYPE (builtin_type_f_complex_s32) = builtin_type_f_real_s16;
 517
 518   builtin_type_string =
 519     init_type (TYPE_CODE_STRING, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 520                0,
 521                "character string", (struct objfile *) NULL);
 522
 523   add_language (&f_language_defn);
 524 }
 525
 526 /* Following is dubious stuff that had been in the xcoff reader. */
 527
 528 struct saved_fcn
 529 {
 530   long                         line_offset;  /* Line offset for function */
 531   struct saved_fcn             *next;
 532 };
 533
 534
 535 struct saved_bf_symnum
 536 {
 537   long       symnum_fcn;  /* Symnum of function (i.e. .function directive) */
 538   long       symnum_bf;   /* Symnum of .bf for this function */
 539   struct saved_bf_symnum *next;
 540 };
 541
 542 typedef struct saved_fcn           SAVED_FUNCTION, *SAVED_FUNCTION_PTR;
 543 typedef struct saved_bf_symnum     SAVED_BF, *SAVED_BF_PTR;
 544
 545
 546 SAVED_BF_PTR allocate_saved_bf_node()
 547 {
 548   SAVED_BF_PTR new;
 549
 550   new = (SAVED_BF_PTR) malloc (sizeof (SAVED_BF));
 551
 552   if (new == NULL)
 553     fatal("could not allocate enough memory to save one more .bf on save list");
 554   return(new);
 555 }
 556
 557 SAVED_FUNCTION *allocate_saved_function_node()
 558 {
 559   SAVED_FUNCTION *new;
 560
 561   new = (SAVED_FUNCTION *) malloc (sizeof (SAVED_FUNCTION));
 562
 563   if (new == NULL)
 564     fatal("could not allocate enough memory to save one more function on save list");
 565
 566   return(new);
 567 }
 568
 569 SAVED_F77_COMMON_PTR allocate_saved_f77_common_node()
 570 {
 571   SAVED_F77_COMMON_PTR new;
 572
 573   new = (SAVED_F77_COMMON_PTR) malloc (sizeof (SAVED_F77_COMMON));
 574
 575   if (new == NULL)
 576     fatal("could not allocate enough memory to save one more F77 COMMON blk on save list");
 577
 578   return(new);
 579 }
 580
 581 COMMON_ENTRY_PTR allocate_common_entry_node()
 582 {
 583   COMMON_ENTRY_PTR new;
 584
 585   new = (COMMON_ENTRY_PTR) malloc (sizeof (COMMON_ENTRY));
 586
 587   if (new == NULL)
 588     fatal("could not allocate enough memory to save one more COMMON entry on save list");
 589
 590   return(new);
 591 }
 592
 593
 594 SAVED_F77_COMMON_PTR head_common_list=NULL;     /* Ptr to 1st saved COMMON  */
 595 SAVED_F77_COMMON_PTR tail_common_list=NULL;     /* Ptr to last saved COMMON  */
 596 SAVED_F77_COMMON_PTR current_common=NULL;       /* Ptr to current COMMON */
 597
 598 static SAVED_BF_PTR saved_bf_list=NULL;          /* Ptr to (.bf,function)
 599                                                     list*/
 600 static SAVED_BF_PTR saved_bf_list_end=NULL;      /* Ptr to above list's end */
 601 static SAVED_BF_PTR current_head_bf_list=NULL;   /* Current head of above list
 602                                                   */
 603
 604 static SAVED_BF_PTR tmp_bf_ptr;                  /* Generic temporary for use
 605                                                     in macros */
 606
 607
 608 /* The following function simply enters a given common block onto
 609    the global common block chain */
 610
 611 void add_common_block(name,offset,secnum,func_stab)
 612      char *name;
 613      CORE_ADDR offset;
 614      int secnum;
 615      char *func_stab;
 616
 617 {
 618   SAVED_F77_COMMON_PTR tmp;
 619   char *c,*local_copy_func_stab;
 620
 621   /* If the COMMON block we are trying to add has a blank
 622      name (i.e. "#BLNK_COM") then we set it to __BLANK
 623      because the darn "#" character makes GDB's input
 624      parser have fits. */
 625
 626
 627   if (STREQ(name,BLANK_COMMON_NAME_ORIGINAL) ||
 628       STREQ(name,BLANK_COMMON_NAME_MF77))
 629     {
 630
 631       free(name);
 632       name = alloca(strlen(BLANK_COMMON_NAME_LOCAL) + 1);
 633       strcpy(name,BLANK_COMMON_NAME_LOCAL);
 634     }
 635
 636   tmp = allocate_saved_f77_common_node();
 637
 638   local_copy_func_stab = malloc (strlen(func_stab) + 1);
 639   strcpy(local_copy_func_stab,func_stab);
 640
 641   tmp->name = malloc(strlen(name) + 1);
 642
 643   /* local_copy_func_stab is a stabstring, let us first extract the
 644      function name from the stab by NULLing out the ':' character. */
 645
 646
 647   c = NULL;
 648   c = strchr(local_copy_func_stab,':');
 649
 650   if (c)
 651     *c = '\0';
 652   else
 653     error("Malformed function STAB found in add_common_block()");
 654
 655
 656   tmp->owning_function = malloc (strlen(local_copy_func_stab) + 1);
 657
 658   strcpy(tmp->owning_function,local_copy_func_stab);
 659
 660   strcpy(tmp->name,name);
 661   tmp->offset = offset;
 662   tmp->next = NULL;
 663   tmp->entries = NULL;
 664   tmp->secnum = secnum;
 665
 666   current_common = tmp;
 667
 668   if (head_common_list == NULL)
 669     {
 670       head_common_list = tail_common_list = tmp;
 671     }
 672   else
 673     {
 674       tail_common_list->next = tmp;
 675       tail_common_list = tmp;
 676     }
 677
 678 }
 679
 680
 681 /* The following function simply enters a given common entry onto
 682    the "current_common" block that has been saved away. */
 683
 684 void add_common_entry(entry_sym_ptr)
 685      struct symbol *entry_sym_ptr;
 686 {
 687   COMMON_ENTRY_PTR tmp;
 688
 689
 690
 691   /* The order of this list is important, since
 692      we expect the entries to appear in decl.
 693      order when we later issue "info common" calls */
 694
 695   tmp = allocate_common_entry_node();
 696
 697   tmp->next = NULL;
 698   tmp->symbol = entry_sym_ptr;
 699
 700   if (current_common == NULL)
 701     error("Attempt to add COMMON entry with no block open!");
 702   else
 703     {
 704       if (current_common->entries == NULL)
 705         {
 706           current_common->entries = tmp;
 707           current_common->end_of_entries = tmp;
 708         }
 709       else
 710         {
 711           current_common->end_of_entries->next = tmp;
 712           current_common->end_of_entries = tmp;
 713         }
 714     }
 715
 716
 717 }
 718
 719 /* This routine finds the first encountred COMMON block named "name" */
 720
 721 SAVED_F77_COMMON_PTR find_first_common_named(name)
 722      char *name;
 723 {
 724
 725   SAVED_F77_COMMON_PTR tmp;
 726
 727   tmp = head_common_list;
 728
 729   while (tmp != NULL)
 730     {
 731       if (STREQ(tmp->name,name))
 732         return(tmp);
 733       else
 734         tmp = tmp->next;
 735     }
 736   return(NULL);
 737 }
 738
 739 /* This routine finds the first encountred COMMON block named "name"
 740    that belongs to function funcname */
 741
 742 SAVED_F77_COMMON_PTR find_common_for_function(name, funcname)
 743      char *name;
 744      char *funcname;
 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) && STREQ(tmp->owning_function,funcname))
 754         return(tmp);
 755       else
 756         tmp = tmp->next;
 757     }
 758   return(NULL);
 759 }
 760
 761
 762
 763
 764 /* The following function is called to patch up the offsets
 765    for the statics contained in the COMMON block named
 766    "name."  */
 767
 768
 769 void patch_common_entries (blk, offset, secnum)
 770      SAVED_F77_COMMON_PTR blk;
 771      CORE_ADDR offset;
 772      int secnum;
 773 {
 774   COMMON_ENTRY_PTR entry;
 775
 776   blk->offset = offset;  /* Keep this around for future use. */
 777
 778   entry = blk->entries;
 779
 780   while (entry != NULL)
 781     {
 782       SYMBOL_VALUE (entry->symbol) += offset;
 783       SYMBOL_SECTION (entry->symbol) = secnum;
 784
 785       entry = entry->next;
 786     }
 787   blk->secnum = secnum;
 788 }
 789
 790
 791 /* Patch all commons named "name" that need patching.Since COMMON
 792    blocks occur with relative infrequency, we simply do a linear scan on
 793    the name.  Eventually, the best way to do this will be a
 794    hashed-lookup.  Secnum is the section number for the .bss section
 795    (which is where common data lives). */
 796
 797
 798 void patch_all_commons_by_name (name, offset, secnum)
 799      char *name;
 800      CORE_ADDR offset;
 801      int secnum;
 802 {
 803
 804   SAVED_F77_COMMON_PTR tmp;
 805
 806   /* For blank common blocks, change the canonical reprsentation
 807      of a blank name */
 808
 809   if ((STREQ(name,BLANK_COMMON_NAME_ORIGINAL)) ||
 810       (STREQ(name,BLANK_COMMON_NAME_MF77)))
 811     {
 812       free(name);
 813       name = alloca(strlen(BLANK_COMMON_NAME_LOCAL) + 1);
 814       strcpy(name,BLANK_COMMON_NAME_LOCAL);
 815     }
 816
 817   tmp = head_common_list;
 818
 819   while (tmp != NULL)
 820     {
 821       if (COMMON_NEEDS_PATCHING(tmp))
 822         if (STREQ(tmp->name,name))
 823           patch_common_entries(tmp,offset,secnum);
 824
 825       tmp = tmp->next;
 826     }
 827
 828 }
 829
 830
 831
 832
 833
 834 /* This macro adds the symbol-number for the start of the function
 835    (the symbol number of the .bf) referenced by symnum_fcn to a
 836    list.  This list, in reality should be a FIFO queue but since
 837    #line pragmas sometimes cause line ranges to get messed up
 838    we simply create a linear list.  This list can then be searched
 839    first by a queueing algorithm and upon failure fall back to
 840    a linear scan. */
 841
 842 #define ADD_BF_SYMNUM(bf_sym,fcn_sym) \
 843   \
 844   if (saved_bf_list == NULL) \
 845 { \
 846     tmp_bf_ptr = allocate_saved_bf_node(); \
 847       \
 848         tmp_bf_ptr->symnum_bf = (bf_sym); \
 849           tmp_bf_ptr->symnum_fcn = (fcn_sym);  \
 850             tmp_bf_ptr->next = NULL; \
 851               \
 852                 current_head_bf_list = saved_bf_list = tmp_bf_ptr; \
 853                   saved_bf_list_end = tmp_bf_ptr; \
 854                   } \
 855 else \
 856 {  \
 857      tmp_bf_ptr = allocate_saved_bf_node(); \
 858        \
 859          tmp_bf_ptr->symnum_bf = (bf_sym);  \
 860            tmp_bf_ptr->symnum_fcn = (fcn_sym);  \
 861              tmp_bf_ptr->next = NULL;  \
 862                \
 863                  saved_bf_list_end->next = tmp_bf_ptr;  \
 864                    saved_bf_list_end = tmp_bf_ptr; \
 865                    }
 866
 867
 868 /* This function frees the entire (.bf,function) list */
 869
 870 void
 871   clear_bf_list()
 872 {
 873
 874   SAVED_BF_PTR tmp = saved_bf_list;
 875   SAVED_BF_PTR next = NULL;
 876
 877   while (tmp != NULL)
 878     {
 879       next = tmp->next;
 880       free(tmp);
 881       tmp=next;
 882     }
 883   saved_bf_list = NULL;
 884 }
 885
 886 int global_remote_debug;
 887
 888 long
 889 get_bf_for_fcn (the_function)
 890      long the_function;
 891 {
 892   SAVED_BF_PTR tmp;
 893   int nprobes = 0;
 894
 895   /* First use a simple queuing algorithm (i.e. look and see if the
 896      item at the head of the queue is the one you want)  */
 897
 898   if (saved_bf_list == NULL)
 899     fatal ("cannot get .bf node off empty list");
 900
 901   if (current_head_bf_list != NULL)
 902     if (current_head_bf_list->symnum_fcn == the_function)
 903       {
 904         if (global_remote_debug)
 905           fprintf(stderr,"*");
 906
 907         tmp = current_head_bf_list;
 908         current_head_bf_list = current_head_bf_list->next;
 909         return(tmp->symnum_bf);
 910       }
 911
 912   /* If the above did not work (probably because #line directives were
 913      used in the sourcefile and they messed up our internal tables) we now do
 914      the ugly linear scan */
 915
 916   if (global_remote_debug)
 917     fprintf(stderr,"\ndefaulting to linear scan\n");
 918
 919   nprobes = 0;
 920   tmp = saved_bf_list;
 921   while (tmp != NULL)
 922     {
 923       nprobes++;
 924       if (tmp->symnum_fcn == the_function)
 925         {
 926           if (global_remote_debug)
 927             fprintf(stderr,"Found in %d probes\n",nprobes);
 928           current_head_bf_list = tmp->next;
 929           return(tmp->symnum_bf);
 930         }
 931       tmp= tmp->next;
 932     }
 933
 934   return(-1);
 935 }
 936
 937 static SAVED_FUNCTION_PTR saved_function_list=NULL;
 938 #if 0   /* Currently unused */
 939 static SAVED_FUNCTION_PTR saved_function_list_end=NULL;
 940 #endif
 941
 942 void clear_function_list()
 943 {
 944   SAVED_FUNCTION_PTR tmp = saved_function_list;
 945   SAVED_FUNCTION_PTR next = NULL;
 946
 947   while (tmp != NULL)
 948     {
 949       next = tmp->next;
 950       free(tmp);
 951       tmp = next;
 952     }
 953
 954   saved_function_list = NULL;
 955 }