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   f_printchar,                  /* Print character constant */
 427   f_printstr,                   /* function to print string constant */
 428   f_create_fundamental_type,    /* Create fundamental type in this language */
 429   f_print_type,                 /* Print a type using appropriate syntax */
 430   f_val_print,                  /* Print a value using appropriate syntax */
 431   c_value_print,  /* FIXME */
 432   {"",      "",   "",   ""},    /* Binary format info */
 433   {"0%o",  "0",   "o", ""},     /* Octal format info */
 434   {"%d",   "",    "d", ""},     /* Decimal format info */
 435   {"0x%x", "0x",  "x", ""},     /* Hex format info */
 436   f_op_print_tab,               /* expression operators for printing */
 437   0,                            /* arrays are first-class (not c-style) */
 438   1,                            /* String lower bound */
 439   &builtin_type_f_character,    /* Type of string elements */
 440   LANG_MAGIC
 441   };
 442
 443 void
 444 _initialize_f_language ()
 445 {
 446   builtin_type_f_void =
 447     init_type (TYPE_CODE_VOID, 1,
 448                0,
 449                "VOID", (struct objfile *) NULL);
 450
 451   builtin_type_f_character =
 452     init_type (TYPE_CODE_INT, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 453                0,
 454                "character", (struct objfile *) NULL);
 455
 456   builtin_type_f_logical_s1 =
 457     init_type (TYPE_CODE_BOOL, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 458                TYPE_FLAG_UNSIGNED,
 459                "logical*1", (struct objfile *) NULL);
 460
 461   builtin_type_f_integer_s2 =
 462     init_type (TYPE_CODE_INT, TARGET_SHORT_BIT / TARGET_CHAR_BIT,
 463                0,
 464                "integer*2", (struct objfile *) NULL);
 465
 466   builtin_type_f_logical_s2 =
 467     init_type (TYPE_CODE_BOOL, TARGET_SHORT_BIT / TARGET_CHAR_BIT,
 468                TYPE_FLAG_UNSIGNED,
 469                "logical*2", (struct objfile *) NULL);
 470
 471   builtin_type_f_integer =
 472     init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT,
 473                0,
 474                "integer", (struct objfile *) NULL);
 475
 476   builtin_type_f_logical =
 477     init_type (TYPE_CODE_BOOL, TARGET_INT_BIT / TARGET_CHAR_BIT,
 478                TYPE_FLAG_UNSIGNED,
 479                "logical*4", (struct objfile *) NULL);
 480
 481   builtin_type_f_real =
 482     init_type (TYPE_CODE_FLT, TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
 483                0,
 484                "real", (struct objfile *) NULL);
 485
 486   builtin_type_f_real_s8 =
 487     init_type (TYPE_CODE_FLT, TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
 488                0,
 489                "real*8", (struct objfile *) NULL);
 490
 491   builtin_type_f_real_s16 =
 492     init_type (TYPE_CODE_FLT, TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
 493                0,
 494                "real*16", (struct objfile *) NULL);
 495
 496   builtin_type_f_complex_s8 =
 497     init_type (TYPE_CODE_COMPLEX, 2 * TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
 498                0,
 499                "complex*8", (struct objfile *) NULL);
 500   TYPE_TARGET_TYPE (builtin_type_f_complex_s8) = builtin_type_f_real;
 501
 502   builtin_type_f_complex_s16 =
 503     init_type (TYPE_CODE_COMPLEX, 2 * TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
 504                0,
 505                "complex*16", (struct objfile *) NULL);
 506   TYPE_TARGET_TYPE (builtin_type_f_complex_s16) = builtin_type_f_real_s8;
 507
 508   /* We have a new size == 4 double floats for the
 509      complex*32 data type */
 510
 511   builtin_type_f_complex_s32 =
 512     init_type (TYPE_CODE_COMPLEX, 2 * TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
 513                0,
 514                "complex*32", (struct objfile *) NULL);
 515   TYPE_TARGET_TYPE (builtin_type_f_complex_s32) = builtin_type_f_real_s16;
 516
 517   builtin_type_string =
 518     init_type (TYPE_CODE_STRING, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 519                0,
 520                "character string", (struct objfile *) NULL);
 521
 522   add_language (&f_language_defn);
 523 }
 524
 525 /* Following is dubious stuff that had been in the xcoff reader. */
 526
 527 struct saved_fcn
 528 {
 529   long                         line_offset;  /* Line offset for function */
 530   struct saved_fcn             *next;
 531 };
 532
 533
 534 struct saved_bf_symnum
 535 {
 536   long       symnum_fcn;  /* Symnum of function (i.e. .function directive) */
 537   long       symnum_bf;   /* Symnum of .bf for this function */
 538   struct saved_bf_symnum *next;
 539 };
 540
 541 typedef struct saved_fcn           SAVED_FUNCTION, *SAVED_FUNCTION_PTR;
 542 typedef struct saved_bf_symnum     SAVED_BF, *SAVED_BF_PTR;
 543
 544
 545 SAVED_BF_PTR allocate_saved_bf_node()
 546 {
 547   SAVED_BF_PTR new;
 548
 549   new = (SAVED_BF_PTR) malloc (sizeof (SAVED_BF));
 550
 551   if (new == NULL)
 552     fatal("could not allocate enough memory to save one more .bf on save list");
 553   return(new);
 554 }
 555
 556 SAVED_FUNCTION *allocate_saved_function_node()
 557 {
 558   SAVED_FUNCTION *new;
 559
 560   new = (SAVED_FUNCTION *) malloc (sizeof (SAVED_FUNCTION));
 561
 562   if (new == NULL)
 563     fatal("could not allocate enough memory to save one more function on save list");
 564
 565   return(new);
 566 }
 567
 568 SAVED_F77_COMMON_PTR allocate_saved_f77_common_node()
 569 {
 570   SAVED_F77_COMMON_PTR new;
 571
 572   new = (SAVED_F77_COMMON_PTR) malloc (sizeof (SAVED_F77_COMMON));
 573
 574   if (new == NULL)
 575     fatal("could not allocate enough memory to save one more F77 COMMON blk on save list");
 576
 577   return(new);
 578 }
 579
 580 COMMON_ENTRY_PTR allocate_common_entry_node()
 581 {
 582   COMMON_ENTRY_PTR new;
 583
 584   new = (COMMON_ENTRY_PTR) malloc (sizeof (COMMON_ENTRY));
 585
 586   if (new == NULL)
 587     fatal("could not allocate enough memory to save one more COMMON entry on save list");
 588
 589   return(new);
 590 }
 591
 592
 593 SAVED_F77_COMMON_PTR head_common_list=NULL;     /* Ptr to 1st saved COMMON  */
 594 SAVED_F77_COMMON_PTR tail_common_list=NULL;     /* Ptr to last saved COMMON  */
 595 SAVED_F77_COMMON_PTR current_common=NULL;       /* Ptr to current COMMON */
 596
 597 static SAVED_BF_PTR saved_bf_list=NULL;          /* Ptr to (.bf,function)
 598                                                     list*/
 599 static SAVED_BF_PTR saved_bf_list_end=NULL;      /* Ptr to above list's end */
 600 static SAVED_BF_PTR current_head_bf_list=NULL;   /* Current head of above list
 601                                                   */
 602
 603 static SAVED_BF_PTR tmp_bf_ptr;                  /* Generic temporary for use
 604                                                     in macros */
 605
 606
 607 /* The following function simply enters a given common block onto
 608    the global common block chain */
 609
 610 void add_common_block(name,offset,secnum,func_stab)
 611      char *name;
 612      CORE_ADDR offset;
 613      int secnum;
 614      char *func_stab;
 615
 616 {
 617   SAVED_F77_COMMON_PTR tmp;
 618   char *c,*local_copy_func_stab;
 619
 620   /* If the COMMON block we are trying to add has a blank
 621      name (i.e. "#BLNK_COM") then we set it to __BLANK
 622      because the darn "#" character makes GDB's input
 623      parser have fits. */
 624
 625
 626   if (STREQ(name,BLANK_COMMON_NAME_ORIGINAL) ||
 627       STREQ(name,BLANK_COMMON_NAME_MF77))
 628     {
 629
 630       free(name);
 631       name = alloca(strlen(BLANK_COMMON_NAME_LOCAL) + 1);
 632       strcpy(name,BLANK_COMMON_NAME_LOCAL);
 633     }
 634
 635   tmp = allocate_saved_f77_common_node();
 636
 637   local_copy_func_stab = malloc (strlen(func_stab) + 1);
 638   strcpy(local_copy_func_stab,func_stab);
 639
 640   tmp->name = malloc(strlen(name) + 1);
 641
 642   /* local_copy_func_stab is a stabstring, let us first extract the
 643      function name from the stab by NULLing out the ':' character. */
 644
 645
 646   c = NULL;
 647   c = strchr(local_copy_func_stab,':');
 648
 649   if (c)
 650     *c = '\0';
 651   else
 652     error("Malformed function STAB found in add_common_block()");
 653
 654
 655   tmp->owning_function = malloc (strlen(local_copy_func_stab) + 1);
 656
 657   strcpy(tmp->owning_function,local_copy_func_stab);
 658
 659   strcpy(tmp->name,name);
 660   tmp->offset = offset;
 661   tmp->next = NULL;
 662   tmp->entries = NULL;
 663   tmp->secnum = secnum;
 664
 665   current_common = tmp;
 666
 667   if (head_common_list == NULL)
 668     {
 669       head_common_list = tail_common_list = tmp;
 670     }
 671   else
 672     {
 673       tail_common_list->next = tmp;
 674       tail_common_list = tmp;
 675     }
 676
 677 }
 678
 679
 680 /* The following function simply enters a given common entry onto
 681    the "current_common" block that has been saved away. */
 682
 683 void add_common_entry(entry_sym_ptr)
 684      struct symbol *entry_sym_ptr;
 685 {
 686   COMMON_ENTRY_PTR tmp;
 687
 688
 689
 690   /* The order of this list is important, since
 691      we expect the entries to appear in decl.
 692      order when we later issue "info common" calls */
 693
 694   tmp = allocate_common_entry_node();
 695
 696   tmp->next = NULL;
 697   tmp->symbol = entry_sym_ptr;
 698
 699   if (current_common == NULL)
 700     error("Attempt to add COMMON entry with no block open!");
 701   else
 702     {
 703       if (current_common->entries == NULL)
 704         {
 705           current_common->entries = tmp;
 706           current_common->end_of_entries = tmp;
 707         }
 708       else
 709         {
 710           current_common->end_of_entries->next = tmp;
 711           current_common->end_of_entries = tmp;
 712         }
 713     }
 714
 715
 716 }
 717
 718 /* This routine finds the first encountred COMMON block named "name" */
 719
 720 SAVED_F77_COMMON_PTR find_first_common_named(name)
 721      char *name;
 722 {
 723
 724   SAVED_F77_COMMON_PTR tmp;
 725
 726   tmp = head_common_list;
 727
 728   while (tmp != NULL)
 729     {
 730       if (STREQ(tmp->name,name))
 731         return(tmp);
 732       else
 733         tmp = tmp->next;
 734     }
 735   return(NULL);
 736 }
 737
 738 /* This routine finds the first encountred COMMON block named "name"
 739    that belongs to function funcname */
 740
 741 SAVED_F77_COMMON_PTR find_common_for_function(name, funcname)
 742      char *name;
 743      char *funcname;
 744 {
 745
 746   SAVED_F77_COMMON_PTR tmp;
 747
 748   tmp = head_common_list;
 749
 750   while (tmp != NULL)
 751     {
 752       if (STREQ(tmp->name,name) && STREQ(tmp->owning_function,funcname))
 753         return(tmp);
 754       else
 755         tmp = tmp->next;
 756     }
 757   return(NULL);
 758 }
 759
 760
 761
 762
 763 /* The following function is called to patch up the offsets
 764    for the statics contained in the COMMON block named
 765    "name."  */
 766
 767
 768 void patch_common_entries (blk, offset, secnum)
 769      SAVED_F77_COMMON_PTR blk;
 770      CORE_ADDR offset;
 771      int secnum;
 772 {
 773   COMMON_ENTRY_PTR entry;
 774
 775   blk->offset = offset;  /* Keep this around for future use. */
 776
 777   entry = blk->entries;
 778
 779   while (entry != NULL)
 780     {
 781       SYMBOL_VALUE (entry->symbol) += offset;
 782       SYMBOL_SECTION (entry->symbol) = secnum;
 783
 784       entry = entry->next;
 785     }
 786   blk->secnum = secnum;
 787 }
 788
 789
 790 /* Patch all commons named "name" that need patching.Since COMMON
 791    blocks occur with relative infrequency, we simply do a linear scan on
 792    the name.  Eventually, the best way to do this will be a
 793    hashed-lookup.  Secnum is the section number for the .bss section
 794    (which is where common data lives). */
 795
 796
 797 void patch_all_commons_by_name (name, offset, secnum)
 798      char *name;
 799      CORE_ADDR offset;
 800      int secnum;
 801 {
 802
 803   SAVED_F77_COMMON_PTR tmp;
 804
 805   /* For blank common blocks, change the canonical reprsentation
 806      of a blank name */
 807
 808   if ((STREQ(name,BLANK_COMMON_NAME_ORIGINAL)) ||
 809       (STREQ(name,BLANK_COMMON_NAME_MF77)))
 810     {
 811       free(name);
 812       name = alloca(strlen(BLANK_COMMON_NAME_LOCAL) + 1);
 813       strcpy(name,BLANK_COMMON_NAME_LOCAL);
 814     }
 815
 816   tmp = head_common_list;
 817
 818   while (tmp != NULL)
 819     {
 820       if (COMMON_NEEDS_PATCHING(tmp))
 821         if (STREQ(tmp->name,name))
 822           patch_common_entries(tmp,offset,secnum);
 823
 824       tmp = tmp->next;
 825     }
 826
 827 }
 828
 829
 830
 831
 832
 833 /* This macro adds the symbol-number for the start of the function
 834    (the symbol number of the .bf) referenced by symnum_fcn to a
 835    list.  This list, in reality should be a FIFO queue but since
 836    #line pragmas sometimes cause line ranges to get messed up
 837    we simply create a linear list.  This list can then be searched
 838    first by a queueing algorithm and upon failure fall back to
 839    a linear scan. */
 840
 841 #define ADD_BF_SYMNUM(bf_sym,fcn_sym) \
 842   \
 843   if (saved_bf_list == NULL) \
 844 { \
 845     tmp_bf_ptr = allocate_saved_bf_node(); \
 846       \
 847         tmp_bf_ptr->symnum_bf = (bf_sym); \
 848           tmp_bf_ptr->symnum_fcn = (fcn_sym);  \
 849             tmp_bf_ptr->next = NULL; \
 850               \
 851                 current_head_bf_list = saved_bf_list = tmp_bf_ptr; \
 852                   saved_bf_list_end = tmp_bf_ptr; \
 853                   } \
 854 else \
 855 {  \
 856      tmp_bf_ptr = allocate_saved_bf_node(); \
 857        \
 858          tmp_bf_ptr->symnum_bf = (bf_sym);  \
 859            tmp_bf_ptr->symnum_fcn = (fcn_sym);  \
 860              tmp_bf_ptr->next = NULL;  \
 861                \
 862                  saved_bf_list_end->next = tmp_bf_ptr;  \
 863                    saved_bf_list_end = tmp_bf_ptr; \
 864                    }
 865
 866
 867 /* This function frees the entire (.bf,function) list */
 868
 869 void
 870   clear_bf_list()
 871 {
 872
 873   SAVED_BF_PTR tmp = saved_bf_list;
 874   SAVED_BF_PTR next = NULL;
 875
 876   while (tmp != NULL)
 877     {
 878       next = tmp->next;
 879       free(tmp);
 880       tmp=next;
 881     }
 882   saved_bf_list = NULL;
 883 }
 884
 885 int global_remote_debug;
 886
 887 long
 888 get_bf_for_fcn (the_function)
 889      long the_function;
 890 {
 891   SAVED_BF_PTR tmp;
 892   int nprobes = 0;
 893
 894   /* First use a simple queuing algorithm (i.e. look and see if the
 895      item at the head of the queue is the one you want)  */
 896
 897   if (saved_bf_list == NULL)
 898     fatal ("cannot get .bf node off empty list");
 899
 900   if (current_head_bf_list != NULL)
 901     if (current_head_bf_list->symnum_fcn == the_function)
 902       {
 903         if (global_remote_debug)
 904           fprintf(stderr,"*");
 905
 906         tmp = current_head_bf_list;
 907         current_head_bf_list = current_head_bf_list->next;
 908         return(tmp->symnum_bf);
 909       }
 910
 911   /* If the above did not work (probably because #line directives were
 912      used in the sourcefile and they messed up our internal tables) we now do
 913      the ugly linear scan */
 914
 915   if (global_remote_debug)
 916     fprintf(stderr,"\ndefaulting to linear scan\n");
 917
 918   nprobes = 0;
 919   tmp = saved_bf_list;
 920   while (tmp != NULL)
 921     {
 922       nprobes++;
 923       if (tmp->symnum_fcn == the_function)
 924         {
 925           if (global_remote_debug)
 926             fprintf(stderr,"Found in %d probes\n",nprobes);
 927           current_head_bf_list = tmp->next;
 928           return(tmp->symnum_bf);
 929         }
 930       tmp= tmp->next;
 931     }
 932
 933   return(-1);
 934 }
 935
 936 static SAVED_FUNCTION_PTR saved_function_list=NULL;
 937 static SAVED_FUNCTION_PTR saved_function_list_end=NULL;
 938
 939 void clear_function_list()
 940 {
 941   SAVED_FUNCTION_PTR tmp = saved_function_list;
 942   SAVED_FUNCTION_PTR next = NULL;
 943
 944   while (tmp != NULL)
 945     {
 946       next = tmp->next;
 947       free(tmp);
 948       tmp = next;
 949     }
 950
 951   saved_function_list = NULL;
 952 }