gdb/f-lang.c

   1 /* Fortran language support routines for GDB, the GNU debugger.
   2    Copyright 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001, 2002
   3    Free Software Foundation, Inc.
   4    Contributed by Motorola.  Adapted from the C parser by Farooq Butt
   5    (fmbutt@engage.sps.mot.com).
   6
   7    This file is part of GDB.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 59 Temple Place - Suite 330,
  22    Boston, MA 02111-1307, USA.  */
  23
  24 #include "defs.h"
  25 #include "gdb_string.h"
  26 #include "symtab.h"
  27 #include "gdbtypes.h"
  28 #include "expression.h"
  29 #include "parser-defs.h"
  30 #include "language.h"
  31 #include "f-lang.h"
  32 #include "valprint.h"
  33
  34 /* The built-in types of F77.  FIXME: integer*4 is missing, plain
  35    logical is missing (builtin_type_logical is logical*4).  */
  36
  37 struct type *builtin_type_f_character;
  38 struct type *builtin_type_f_logical;
  39 struct type *builtin_type_f_logical_s1;
  40 struct type *builtin_type_f_logical_s2;
  41 struct type *builtin_type_f_integer;
  42 struct type *builtin_type_f_integer_s2;
  43 struct type *builtin_type_f_real;
  44 struct type *builtin_type_f_real_s8;
  45 struct type *builtin_type_f_real_s16;
  46 struct type *builtin_type_f_complex_s8;
  47 struct type *builtin_type_f_complex_s16;
  48 struct type *builtin_type_f_complex_s32;
  49 struct type *builtin_type_f_void;
  50
  51 /* Following is dubious stuff that had been in the xcoff reader. */
  52
  53 struct saved_fcn
  54   {
  55     long line_offset;           /* Line offset for function */
  56     struct saved_fcn *next;
  57   };
  58
  59
  60 struct saved_bf_symnum
  61   {
  62     long symnum_fcn;            /* Symnum of function (i.e. .function directive) */
  63     long symnum_bf;             /* Symnum of .bf for this function */
  64     struct saved_bf_symnum *next;
  65   };
  66
  67 typedef struct saved_fcn SAVED_FUNCTION, *SAVED_FUNCTION_PTR;
  68 typedef struct saved_bf_symnum SAVED_BF, *SAVED_BF_PTR;
  69
  70 /* Local functions */
  71
  72 extern void _initialize_f_language (void);
  73 #if 0
  74 static void clear_function_list (void);
  75 static long get_bf_for_fcn (long);
  76 static void clear_bf_list (void);
  77 static void patch_all_commons_by_name (char *, CORE_ADDR, int);
  78 static SAVED_F77_COMMON_PTR find_first_common_named (char *);
  79 static void add_common_entry (struct symbol *);
  80 static void add_common_block (char *, CORE_ADDR, int, char *);
  81 static SAVED_FUNCTION *allocate_saved_function_node (void);
  82 static SAVED_BF_PTR allocate_saved_bf_node (void);
  83 static COMMON_ENTRY_PTR allocate_common_entry_node (void);
  84 static SAVED_F77_COMMON_PTR allocate_saved_f77_common_node (void);
  85 static void patch_common_entries (SAVED_F77_COMMON_PTR, CORE_ADDR, int);
  86 #endif
  87
  88 static struct type *f_create_fundamental_type (struct objfile *, int);
  89 static void f_printstr (struct ui_file * stream, char *string,
  90                         unsigned int length, int width,
  91                         int force_ellipses);
  92 static void f_printchar (int c, struct ui_file * stream);
  93 static void f_emit_char (int c, struct ui_file * stream, int quoter);
  94
  95 /* Print the character C on STREAM as part of the contents of a literal
  96    string whose delimiter is QUOTER.  Note that that format for printing
  97    characters and strings is language specific.
  98    FIXME:  This is a copy of the same function from c-exp.y.  It should
  99    be replaced with a true F77 version.  */
 100
 101 static void
 102 f_emit_char (register int c, struct ui_file *stream, int quoter)
 103 {
 104   c &= 0xFF;                    /* Avoid sign bit follies */
 105
 106   if (PRINT_LITERAL_FORM (c))
 107     {
 108       if (c == '\\' || c == quoter)
 109         fputs_filtered ("\\", stream);
 110       fprintf_filtered (stream, "%c", c);
 111     }
 112   else
 113     {
 114       switch (c)
 115         {
 116         case '\n':
 117           fputs_filtered ("\\n", stream);
 118           break;
 119         case '\b':
 120           fputs_filtered ("\\b", stream);
 121           break;
 122         case '\t':
 123           fputs_filtered ("\\t", stream);
 124           break;
 125         case '\f':
 126           fputs_filtered ("\\f", stream);
 127           break;
 128         case '\r':
 129           fputs_filtered ("\\r", stream);
 130           break;
 131         case '\033':
 132           fputs_filtered ("\\e", stream);
 133           break;
 134         case '\007':
 135           fputs_filtered ("\\a", stream);
 136           break;
 137         default:
 138           fprintf_filtered (stream, "\\%.3o", (unsigned int) c);
 139           break;
 140         }
 141     }
 142 }
 143
 144 /* FIXME:  This is a copy of the same function from c-exp.y.  It should
 145    be replaced with a true F77version. */
 146
 147 static void
 148 f_printchar (int c, struct ui_file *stream)
 149 {
 150   fputs_filtered ("'", stream);
 151   LA_EMIT_CHAR (c, stream, '\'');
 152   fputs_filtered ("'", stream);
 153 }
 154
 155 /* Print the character string STRING, printing at most LENGTH characters.
 156    Printing stops early if the number hits print_max; repeat counts
 157    are printed as appropriate.  Print ellipses at the end if we
 158    had to stop before printing LENGTH characters, or if FORCE_ELLIPSES.
 159    FIXME:  This is a copy of the same function from c-exp.y.  It should
 160    be replaced with a true F77 version. */
 161
 162 static void
 163 f_printstr (struct ui_file *stream, char *string, unsigned int length,
 164             int width, int force_ellipses)
 165 {
 166   register unsigned int i;
 167   unsigned int things_printed = 0;
 168   int in_quotes = 0;
 169   int need_comma = 0;
 170   extern int inspect_it;
 171
 172   if (length == 0)
 173     {
 174       fputs_filtered ("''", gdb_stdout);
 175       return;
 176     }
 177
 178   for (i = 0; i < length && things_printed < print_max; ++i)
 179     {
 180       /* Position of the character we are examining
 181          to see whether it is repeated.  */
 182       unsigned int rep1;
 183       /* Number of repetitions we have detected so far.  */
 184       unsigned int reps;
 185
 186       QUIT;
 187
 188       if (need_comma)
 189         {
 190           fputs_filtered (", ", stream);
 191           need_comma = 0;
 192         }
 193
 194       rep1 = i + 1;
 195       reps = 1;
 196       while (rep1 < length && string[rep1] == string[i])
 197         {
 198           ++rep1;
 199           ++reps;
 200         }
 201
 202       if (reps > repeat_count_threshold)
 203         {
 204           if (in_quotes)
 205             {
 206               if (inspect_it)
 207                 fputs_filtered ("\\', ", stream);
 208               else
 209                 fputs_filtered ("', ", stream);
 210               in_quotes = 0;
 211             }
 212           f_printchar (string[i], stream);
 213           fprintf_filtered (stream, " <repeats %u times>", reps);
 214           i = rep1 - 1;
 215           things_printed += repeat_count_threshold;
 216           need_comma = 1;
 217         }
 218       else
 219         {
 220           if (!in_quotes)
 221             {
 222               if (inspect_it)
 223                 fputs_filtered ("\\'", stream);
 224               else
 225                 fputs_filtered ("'", stream);
 226               in_quotes = 1;
 227             }
 228           LA_EMIT_CHAR (string[i], stream, '"');
 229           ++things_printed;
 230         }
 231     }
 232
 233   /* Terminate the quotes if necessary.  */
 234   if (in_quotes)
 235     {
 236       if (inspect_it)
 237         fputs_filtered ("\\'", stream);
 238       else
 239         fputs_filtered ("'", stream);
 240     }
 241
 242   if (force_ellipses || i < length)
 243     fputs_filtered ("...", stream);
 244 }
 245
 246 /* FIXME:  This is a copy of c_create_fundamental_type(), before
 247    all the non-C types were stripped from it.  Needs to be fixed
 248    by an experienced F77 programmer. */
 249
 250 static struct type *
 251 f_create_fundamental_type (struct objfile *objfile, int typeid)
 252 {
 253   register struct type *type = NULL;
 254
 255   switch (typeid)
 256     {
 257     case FT_VOID:
 258       type = init_type (TYPE_CODE_VOID,
 259                         TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 260                         0, "VOID", objfile);
 261       break;
 262     case FT_BOOLEAN:
 263       type = init_type (TYPE_CODE_BOOL,
 264                         TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 265                         TYPE_FLAG_UNSIGNED, "boolean", objfile);
 266       break;
 267     case FT_STRING:
 268       type = init_type (TYPE_CODE_STRING,
 269                         TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 270                         0, "string", objfile);
 271       break;
 272     case FT_CHAR:
 273       type = init_type (TYPE_CODE_INT,
 274                         TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 275                         0, "character", objfile);
 276       break;
 277     case FT_SIGNED_CHAR:
 278       type = init_type (TYPE_CODE_INT,
 279                         TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 280                         0, "integer*1", objfile);
 281       break;
 282     case FT_UNSIGNED_CHAR:
 283       type = init_type (TYPE_CODE_BOOL,
 284                         TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 285                         TYPE_FLAG_UNSIGNED, "logical*1", objfile);
 286       break;
 287     case FT_SHORT:
 288       type = init_type (TYPE_CODE_INT,
 289                         TARGET_SHORT_BIT / TARGET_CHAR_BIT,
 290                         0, "integer*2", objfile);
 291       break;
 292     case FT_SIGNED_SHORT:
 293       type = init_type (TYPE_CODE_INT,
 294                         TARGET_SHORT_BIT / TARGET_CHAR_BIT,
 295                         0, "short", objfile);   /* FIXME-fnf */
 296       break;
 297     case FT_UNSIGNED_SHORT:
 298       type = init_type (TYPE_CODE_BOOL,
 299                         TARGET_SHORT_BIT / TARGET_CHAR_BIT,
 300                         TYPE_FLAG_UNSIGNED, "logical*2", objfile);
 301       break;
 302     case FT_INTEGER:
 303       type = init_type (TYPE_CODE_INT,
 304                         TARGET_INT_BIT / TARGET_CHAR_BIT,
 305                         0, "integer*4", objfile);
 306       break;
 307     case FT_SIGNED_INTEGER:
 308       type = init_type (TYPE_CODE_INT,
 309                         TARGET_INT_BIT / TARGET_CHAR_BIT,
 310                         0, "integer", objfile);         /* FIXME -fnf */
 311       break;
 312     case FT_UNSIGNED_INTEGER:
 313       type = init_type (TYPE_CODE_BOOL,
 314                         TARGET_INT_BIT / TARGET_CHAR_BIT,
 315                         TYPE_FLAG_UNSIGNED, "logical*4", objfile);
 316       break;
 317     case FT_FIXED_DECIMAL:
 318       type = init_type (TYPE_CODE_INT,
 319                         TARGET_INT_BIT / TARGET_CHAR_BIT,
 320                         0, "fixed decimal", objfile);
 321       break;
 322     case FT_LONG:
 323       type = init_type (TYPE_CODE_INT,
 324                         TARGET_LONG_BIT / TARGET_CHAR_BIT,
 325                         0, "long", objfile);
 326       break;
 327     case FT_SIGNED_LONG:
 328       type = init_type (TYPE_CODE_INT,
 329                         TARGET_LONG_BIT / TARGET_CHAR_BIT,
 330                         0, "long", objfile);    /* FIXME -fnf */
 331       break;
 332     case FT_UNSIGNED_LONG:
 333       type = init_type (TYPE_CODE_INT,
 334                         TARGET_LONG_BIT / TARGET_CHAR_BIT,
 335                         TYPE_FLAG_UNSIGNED, "unsigned long", objfile);
 336       break;
 337     case FT_LONG_LONG:
 338       type = init_type (TYPE_CODE_INT,
 339                         TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
 340                         0, "long long", objfile);
 341       break;
 342     case FT_SIGNED_LONG_LONG:
 343       type = init_type (TYPE_CODE_INT,
 344                         TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
 345                         0, "signed long long", objfile);
 346       break;
 347     case FT_UNSIGNED_LONG_LONG:
 348       type = init_type (TYPE_CODE_INT,
 349                         TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
 350                         TYPE_FLAG_UNSIGNED, "unsigned long long", objfile);
 351       break;
 352     case FT_FLOAT:
 353       type = init_type (TYPE_CODE_FLT,
 354                         TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
 355                         0, "real", objfile);
 356       break;
 357     case FT_DBL_PREC_FLOAT:
 358       type = init_type (TYPE_CODE_FLT,
 359                         TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
 360                         0, "real*8", objfile);
 361       break;
 362     case FT_FLOAT_DECIMAL:
 363       type = init_type (TYPE_CODE_FLT,
 364                         TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
 365                         0, "floating decimal", objfile);
 366       break;
 367     case FT_EXT_PREC_FLOAT:
 368       type = init_type (TYPE_CODE_FLT,
 369                         TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
 370                         0, "real*16", objfile);
 371       break;
 372     case FT_COMPLEX:
 373       type = init_type (TYPE_CODE_COMPLEX,
 374                         2 * TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
 375                         0, "complex*8", objfile);
 376       TYPE_TARGET_TYPE (type) = builtin_type_f_real;
 377       break;
 378     case FT_DBL_PREC_COMPLEX:
 379       type = init_type (TYPE_CODE_COMPLEX,
 380                         2 * TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
 381                         0, "complex*16", objfile);
 382       TYPE_TARGET_TYPE (type) = builtin_type_f_real_s8;
 383       break;
 384     case FT_EXT_PREC_COMPLEX:
 385       type = init_type (TYPE_CODE_COMPLEX,
 386                         2 * TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
 387                         0, "complex*32", objfile);
 388       TYPE_TARGET_TYPE (type) = builtin_type_f_real_s16;
 389       break;
 390     default:
 391       /* FIXME:  For now, if we are asked to produce a type not in this
 392          language, create the equivalent of a C integer type with the
 393          name "<?type?>".  When all the dust settles from the type
 394          reconstruction work, this should probably become an error. */
 395       type = init_type (TYPE_CODE_INT,
 396                         TARGET_INT_BIT / TARGET_CHAR_BIT,
 397                         0, "<?type?>", objfile);
 398       warning ("internal error: no F77 fundamental type %d", typeid);
 399       break;
 400     }
 401   return (type);
 402 }
 403 \f
 404
 405 /* Table of operators and their precedences for printing expressions.  */
 406
 407 static const struct op_print f_op_print_tab[] =
 408 {
 409   {"+", BINOP_ADD, PREC_ADD, 0},
 410   {"+", UNOP_PLUS, PREC_PREFIX, 0},
 411   {"-", BINOP_SUB, PREC_ADD, 0},
 412   {"-", UNOP_NEG, PREC_PREFIX, 0},
 413   {"*", BINOP_MUL, PREC_MUL, 0},
 414   {"/", BINOP_DIV, PREC_MUL, 0},
 415   {"DIV", BINOP_INTDIV, PREC_MUL, 0},
 416   {"MOD", BINOP_REM, PREC_MUL, 0},
 417   {"=", BINOP_ASSIGN, PREC_ASSIGN, 1},
 418   {".OR.", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
 419   {".AND.", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
 420   {".NOT.", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
 421   {".EQ.", BINOP_EQUAL, PREC_EQUAL, 0},
 422   {".NE.", BINOP_NOTEQUAL, PREC_EQUAL, 0},
 423   {".LE.", BINOP_LEQ, PREC_ORDER, 0},
 424   {".GE.", BINOP_GEQ, PREC_ORDER, 0},
 425   {".GT.", BINOP_GTR, PREC_ORDER, 0},
 426   {".LT.", BINOP_LESS, PREC_ORDER, 0},
 427   {"**", UNOP_IND, PREC_PREFIX, 0},
 428   {"@", BINOP_REPEAT, PREC_REPEAT, 0},
 429   {NULL, 0, 0, 0}
 430 };
 431 \f
 432 struct type **const (f_builtin_types[]) =
 433 {
 434   &builtin_type_f_character,
 435     &builtin_type_f_logical,
 436     &builtin_type_f_logical_s1,
 437     &builtin_type_f_logical_s2,
 438     &builtin_type_f_integer,
 439     &builtin_type_f_integer_s2,
 440     &builtin_type_f_real,
 441     &builtin_type_f_real_s8,
 442     &builtin_type_f_real_s16,
 443     &builtin_type_f_complex_s8,
 444     &builtin_type_f_complex_s16,
 445 #if 0
 446     &builtin_type_f_complex_s32,
 447 #endif
 448     &builtin_type_f_void,
 449     0
 450 };
 451
 452 /* This is declared in c-lang.h but it is silly to import that file for what
 453    is already just a hack. */
 454 extern int c_value_print (struct value *, struct ui_file *, int,
 455                           enum val_prettyprint);
 456
 457 const struct language_defn f_language_defn =
 458 {
 459   "fortran",
 460   language_fortran,
 461   f_builtin_types,
 462   range_check_on,
 463   type_check_on,
 464   case_sensitive_off,
 465   f_parse,                      /* parser */
 466   f_error,                      /* parser error function */
 467   evaluate_subexp_standard,
 468   f_printchar,                  /* Print character constant */
 469   f_printstr,                   /* function to print string constant */
 470   f_emit_char,                  /* Function to print a single character */
 471   f_create_fundamental_type,    /* Create fundamental type in this language */
 472   f_print_type,                 /* Print a type using appropriate syntax */
 473   f_val_print,                  /* Print a value using appropriate syntax */
 474   c_value_print,                /* FIXME */
 475   {"", "", "", ""},             /* Binary format info */
 476   {"0%o", "0", "o", ""},        /* Octal format info */
 477   {"%d", "", "d", ""},          /* Decimal format info */
 478   {"0x%x", "0x", "x", ""},      /* Hex format info */
 479   f_op_print_tab,               /* expression operators for printing */
 480   0,                            /* arrays are first-class (not c-style) */
 481   1,                            /* String lower bound */
 482   &builtin_type_f_character,    /* Type of string elements */
 483   LANG_MAGIC
 484 };
 485
 486 void
 487 _initialize_f_language (void)
 488 {
 489   builtin_type_f_void =
 490     init_type (TYPE_CODE_VOID, 1,
 491                0,
 492                "VOID", (struct objfile *) NULL);
 493
 494   builtin_type_f_character =
 495     init_type (TYPE_CODE_INT, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 496                0,
 497                "character", (struct objfile *) NULL);
 498
 499   builtin_type_f_logical_s1 =
 500     init_type (TYPE_CODE_BOOL, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 501                TYPE_FLAG_UNSIGNED,
 502                "logical*1", (struct objfile *) NULL);
 503
 504   builtin_type_f_integer_s2 =
 505     init_type (TYPE_CODE_INT, TARGET_SHORT_BIT / TARGET_CHAR_BIT,
 506                0,
 507                "integer*2", (struct objfile *) NULL);
 508
 509   builtin_type_f_logical_s2 =
 510     init_type (TYPE_CODE_BOOL, TARGET_SHORT_BIT / TARGET_CHAR_BIT,
 511                TYPE_FLAG_UNSIGNED,
 512                "logical*2", (struct objfile *) NULL);
 513
 514   builtin_type_f_integer =
 515     init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT,
 516                0,
 517                "integer", (struct objfile *) NULL);
 518
 519   builtin_type_f_logical =
 520     init_type (TYPE_CODE_BOOL, TARGET_INT_BIT / TARGET_CHAR_BIT,
 521                TYPE_FLAG_UNSIGNED,
 522                "logical*4", (struct objfile *) NULL);
 523
 524   builtin_type_f_real =
 525     init_type (TYPE_CODE_FLT, TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
 526                0,
 527                "real", (struct objfile *) NULL);
 528
 529   builtin_type_f_real_s8 =
 530     init_type (TYPE_CODE_FLT, TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
 531                0,
 532                "real*8", (struct objfile *) NULL);
 533
 534   builtin_type_f_real_s16 =
 535     init_type (TYPE_CODE_FLT, TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
 536                0,
 537                "real*16", (struct objfile *) NULL);
 538
 539   builtin_type_f_complex_s8 =
 540     init_type (TYPE_CODE_COMPLEX, 2 * TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
 541                0,
 542                "complex*8", (struct objfile *) NULL);
 543   TYPE_TARGET_TYPE (builtin_type_f_complex_s8) = builtin_type_f_real;
 544
 545   builtin_type_f_complex_s16 =
 546     init_type (TYPE_CODE_COMPLEX, 2 * TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
 547                0,
 548                "complex*16", (struct objfile *) NULL);
 549   TYPE_TARGET_TYPE (builtin_type_f_complex_s16) = builtin_type_f_real_s8;
 550
 551   /* We have a new size == 4 double floats for the
 552      complex*32 data type */
 553
 554   builtin_type_f_complex_s32 =
 555     init_type (TYPE_CODE_COMPLEX, 2 * TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
 556                0,
 557                "complex*32", (struct objfile *) NULL);
 558   TYPE_TARGET_TYPE (builtin_type_f_complex_s32) = builtin_type_f_real_s16;
 559
 560   builtin_type_string =
 561     init_type (TYPE_CODE_STRING, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 562                0,
 563                "character string", (struct objfile *) NULL);
 564
 565   add_language (&f_language_defn);
 566 }
 567
 568 #if 0
 569 static SAVED_BF_PTR
 570 allocate_saved_bf_node (void)
 571 {
 572   SAVED_BF_PTR new;
 573
 574   new = (SAVED_BF_PTR) xmalloc (sizeof (SAVED_BF));
 575   return (new);
 576 }
 577
 578 static SAVED_FUNCTION *
 579 allocate_saved_function_node (void)
 580 {
 581   SAVED_FUNCTION *new;
 582
 583   new = (SAVED_FUNCTION *) xmalloc (sizeof (SAVED_FUNCTION));
 584   return (new);
 585 }
 586
 587 static SAVED_F77_COMMON_PTR
 588 allocate_saved_f77_common_node (void)
 589 {
 590   SAVED_F77_COMMON_PTR new;
 591
 592   new = (SAVED_F77_COMMON_PTR) xmalloc (sizeof (SAVED_F77_COMMON));
 593   return (new);
 594 }
 595
 596 static COMMON_ENTRY_PTR
 597 allocate_common_entry_node (void)
 598 {
 599   COMMON_ENTRY_PTR new;
 600
 601   new = (COMMON_ENTRY_PTR) xmalloc (sizeof (COMMON_ENTRY));
 602   return (new);
 603 }
 604 #endif
 605
 606 SAVED_F77_COMMON_PTR head_common_list = NULL;   /* Ptr to 1st saved COMMON  */
 607 SAVED_F77_COMMON_PTR tail_common_list = NULL;   /* Ptr to last saved COMMON  */
 608 SAVED_F77_COMMON_PTR current_common = NULL;     /* Ptr to current COMMON */
 609
 610 #if 0
 611 static SAVED_BF_PTR saved_bf_list = NULL;       /* Ptr to (.bf,function)
 612                                                    list */
 613 static SAVED_BF_PTR saved_bf_list_end = NULL;   /* Ptr to above list's end */
 614 static SAVED_BF_PTR current_head_bf_list = NULL;        /* Current head of above list
 615                                                          */
 616
 617 static SAVED_BF_PTR tmp_bf_ptr; /* Generic temporary for use
 618                                    in macros */
 619
 620 /* The following function simply enters a given common block onto
 621    the global common block chain */
 622
 623 static void
 624 add_common_block (char *name, CORE_ADDR offset, int secnum, char *func_stab)
 625 {
 626   SAVED_F77_COMMON_PTR tmp;
 627   char *c, *local_copy_func_stab;
 628
 629   /* If the COMMON block we are trying to add has a blank
 630      name (i.e. "#BLNK_COM") then we set it to __BLANK
 631      because the darn "#" character makes GDB's input
 632      parser have fits. */
 633
 634
 635   if (STREQ (name, BLANK_COMMON_NAME_ORIGINAL) ||
 636       STREQ (name, BLANK_COMMON_NAME_MF77))
 637     {
 638
 639       xfree (name);
 640       name = alloca (strlen (BLANK_COMMON_NAME_LOCAL) + 1);
 641       strcpy (name, BLANK_COMMON_NAME_LOCAL);
 642     }
 643
 644   tmp = allocate_saved_f77_common_node ();
 645
 646   local_copy_func_stab = xmalloc (strlen (func_stab) + 1);
 647   strcpy (local_copy_func_stab, func_stab);
 648
 649   tmp->name = xmalloc (strlen (name) + 1);
 650
 651   /* local_copy_func_stab is a stabstring, let us first extract the
 652      function name from the stab by NULLing out the ':' character. */
 653
 654
 655   c = NULL;
 656   c = strchr (local_copy_func_stab, ':');
 657
 658   if (c)
 659     *c = '\0';
 660   else
 661     error ("Malformed function STAB found in add_common_block()");
 662
 663
 664   tmp->owning_function = xmalloc (strlen (local_copy_func_stab) + 1);
 665
 666   strcpy (tmp->owning_function, local_copy_func_stab);
 667
 668   strcpy (tmp->name, name);
 669   tmp->offset = offset;
 670   tmp->next = NULL;
 671   tmp->entries = NULL;
 672   tmp->secnum = secnum;
 673
 674   current_common = tmp;
 675
 676   if (head_common_list == NULL)
 677     {
 678       head_common_list = tail_common_list = tmp;
 679     }
 680   else
 681     {
 682       tail_common_list->next = tmp;
 683       tail_common_list = tmp;
 684     }
 685 }
 686 #endif
 687
 688 /* The following function simply enters a given common entry onto
 689    the "current_common" block that has been saved away. */
 690
 691 #if 0
 692 static void
 693 add_common_entry (struct symbol *entry_sym_ptr)
 694 {
 695   COMMON_ENTRY_PTR tmp;
 696
 697
 698
 699   /* The order of this list is important, since
 700      we expect the entries to appear in decl.
 701      order when we later issue "info common" calls */
 702
 703   tmp = allocate_common_entry_node ();
 704
 705   tmp->next = NULL;
 706   tmp->symbol = entry_sym_ptr;
 707
 708   if (current_common == NULL)
 709     error ("Attempt to add COMMON entry with no block open!");
 710   else
 711     {
 712       if (current_common->entries == NULL)
 713         {
 714           current_common->entries = tmp;
 715           current_common->end_of_entries = tmp;
 716         }
 717       else
 718         {
 719           current_common->end_of_entries->next = tmp;
 720           current_common->end_of_entries = tmp;
 721         }
 722     }
 723 }
 724 #endif
 725
 726 /* This routine finds the first encountred COMMON block named "name" */
 727
 728 #if 0
 729 static SAVED_F77_COMMON_PTR
 730 find_first_common_named (char *name)
 731 {
 732
 733   SAVED_F77_COMMON_PTR tmp;
 734
 735   tmp = head_common_list;
 736
 737   while (tmp != NULL)
 738     {
 739       if (STREQ (tmp->name, name))
 740         return (tmp);
 741       else
 742         tmp = tmp->next;
 743     }
 744   return (NULL);
 745 }
 746 #endif
 747
 748 /* This routine finds the first encountred COMMON block named "name"
 749    that belongs to function funcname */
 750
 751 SAVED_F77_COMMON_PTR
 752 find_common_for_function (char *name, char *funcname)
 753 {
 754
 755   SAVED_F77_COMMON_PTR tmp;
 756
 757   tmp = head_common_list;
 758
 759   while (tmp != NULL)
 760     {
 761       if (STREQ (tmp->name, name) && STREQ (tmp->owning_function, funcname))
 762         return (tmp);
 763       else
 764         tmp = tmp->next;
 765     }
 766   return (NULL);
 767 }
 768
 769
 770 #if 0
 771
 772 /* The following function is called to patch up the offsets
 773    for the statics contained in the COMMON block named
 774    "name."  */
 775
 776 static void
 777 patch_common_entries (SAVED_F77_COMMON_PTR blk, CORE_ADDR offset, int secnum)
 778 {
 779   COMMON_ENTRY_PTR entry;
 780
 781   blk->offset = offset;         /* Keep this around for future use. */
 782
 783   entry = blk->entries;
 784
 785   while (entry != NULL)
 786     {
 787       SYMBOL_VALUE (entry->symbol) += offset;
 788       SYMBOL_SECTION (entry->symbol) = secnum;
 789
 790       entry = entry->next;
 791     }
 792   blk->secnum = secnum;
 793 }
 794
 795 /* Patch all commons named "name" that need patching.Since COMMON
 796    blocks occur with relative infrequency, we simply do a linear scan on
 797    the name.  Eventually, the best way to do this will be a
 798    hashed-lookup.  Secnum is the section number for the .bss section
 799    (which is where common data lives). */
 800
 801 static void
 802 patch_all_commons_by_name (char *name, CORE_ADDR offset, int secnum)
 803 {
 804
 805   SAVED_F77_COMMON_PTR tmp;
 806
 807   /* For blank common blocks, change the canonical reprsentation
 808      of a blank name */
 809
 810   if ((STREQ (name, BLANK_COMMON_NAME_ORIGINAL)) ||
 811       (STREQ (name, BLANK_COMMON_NAME_MF77)))
 812     {
 813       xfree (name);
 814       name = alloca (strlen (BLANK_COMMON_NAME_LOCAL) + 1);
 815       strcpy (name, BLANK_COMMON_NAME_LOCAL);
 816     }
 817
 818   tmp = head_common_list;
 819
 820   while (tmp != NULL)
 821     {
 822       if (COMMON_NEEDS_PATCHING (tmp))
 823         if (STREQ (tmp->name, name))
 824           patch_common_entries (tmp, offset, secnum);
 825
 826       tmp = tmp->next;
 827     }
 828 }
 829 #endif
 830
 831 /* This macro adds the symbol-number for the start of the function
 832    (the symbol number of the .bf) referenced by symnum_fcn to a
 833    list.  This list, in reality should be a FIFO queue but since
 834    #line pragmas sometimes cause line ranges to get messed up
 835    we simply create a linear list.  This list can then be searched
 836    first by a queueing algorithm and upon failure fall back to
 837    a linear scan. */
 838
 839 #if 0
 840 #define ADD_BF_SYMNUM(bf_sym,fcn_sym) \
 841   \
 842   if (saved_bf_list == NULL) \
 843 { \
 844     tmp_bf_ptr = allocate_saved_bf_node(); \
 845       \
 846         tmp_bf_ptr->symnum_bf = (bf_sym); \
 847           tmp_bf_ptr->symnum_fcn = (fcn_sym);  \
 848             tmp_bf_ptr->next = NULL; \
 849               \
 850                 current_head_bf_list = saved_bf_list = tmp_bf_ptr; \
 851                   saved_bf_list_end = tmp_bf_ptr; \
 852                   } \
 853 else \
 854 {  \
 855      tmp_bf_ptr = allocate_saved_bf_node(); \
 856        \
 857          tmp_bf_ptr->symnum_bf = (bf_sym);  \
 858            tmp_bf_ptr->symnum_fcn = (fcn_sym);  \
 859              tmp_bf_ptr->next = NULL;  \
 860                \
 861                  saved_bf_list_end->next = tmp_bf_ptr;  \
 862                    saved_bf_list_end = tmp_bf_ptr; \
 863                    }
 864 #endif
 865
 866 /* This function frees the entire (.bf,function) list */
 867
 868 #if 0
 869 static void
 870 clear_bf_list (void)
 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       xfree (tmp);
 880       tmp = next;
 881     }
 882   saved_bf_list = NULL;
 883 }
 884 #endif
 885
 886 int global_remote_debug;
 887
 888 #if 0
 889
 890 static long
 891 get_bf_for_fcn (long the_function)
 892 {
 893   SAVED_BF_PTR tmp;
 894   int nprobes = 0;
 895
 896   /* First use a simple queuing algorithm (i.e. look and see if the
 897      item at the head of the queue is the one you want)  */
 898
 899   if (saved_bf_list == NULL)
 900     internal_error (__FILE__, __LINE__,
 901                     "cannot get .bf node off empty list");
 902
 903   if (current_head_bf_list != NULL)
 904     if (current_head_bf_list->symnum_fcn == the_function)
 905       {
 906         if (global_remote_debug)
 907           fprintf_unfiltered (gdb_stderr, "*");
 908
 909         tmp = current_head_bf_list;
 910         current_head_bf_list = current_head_bf_list->next;
 911         return (tmp->symnum_bf);
 912       }
 913
 914   /* If the above did not work (probably because #line directives were
 915      used in the sourcefile and they messed up our internal tables) we now do
 916      the ugly linear scan */
 917
 918   if (global_remote_debug)
 919     fprintf_unfiltered (gdb_stderr, "\ndefaulting to linear scan\n");
 920
 921   nprobes = 0;
 922   tmp = saved_bf_list;
 923   while (tmp != NULL)
 924     {
 925       nprobes++;
 926       if (tmp->symnum_fcn == the_function)
 927         {
 928           if (global_remote_debug)
 929             fprintf_unfiltered (gdb_stderr, "Found in %d probes\n", nprobes);
 930           current_head_bf_list = tmp->next;
 931           return (tmp->symnum_bf);
 932         }
 933       tmp = tmp->next;
 934     }
 935
 936   return (-1);
 937 }
 938
 939 static SAVED_FUNCTION_PTR saved_function_list = NULL;
 940 static SAVED_FUNCTION_PTR saved_function_list_end = NULL;
 941
 942 static void
 943 clear_function_list (void)
 944 {
 945   SAVED_FUNCTION_PTR tmp = saved_function_list;
 946   SAVED_FUNCTION_PTR next = NULL;
 947
 948   while (tmp != NULL)
 949     {
 950       next = tmp->next;
 951       xfree (tmp);
 952       tmp = next;
 953     }
 954
 955   saved_function_list = NULL;
 956 }
 957 #endif