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