gdb/f-lang.c

   1 /* Fortran language support routines for GDB, the GNU debugger.
   2
   3    Copyright (C) 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2003,
   4    2004, 2005, 2007, 2008 Free Software Foundation, Inc.
   5
   6    Contributed by Motorola.  Adapted from the C parser by Farooq Butt
   7    (fmbutt@engage.sps.mot.com).
   8
   9    This file is part of GDB.
  10
  11    This program is free software; you can redistribute it and/or modify
  12    it under the terms of the GNU General Public License as published by
  13    the Free Software Foundation; either version 3 of the License, or
  14    (at your option) any later version.
  15
  16    This program is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19    GNU General Public License for more details.
  20
  21    You should have received a copy of the GNU General Public License
  22    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  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 #include "value.h"
  34
  35
  36 /* Following is dubious stuff that had been in the xcoff reader. */
  37
  38 struct saved_fcn
  39   {
  40     long line_offset;           /* Line offset for function */
  41     struct saved_fcn *next;
  42   };
  43
  44
  45 struct saved_bf_symnum
  46   {
  47     long symnum_fcn;            /* Symnum of function (i.e. .function directive) */
  48     long symnum_bf;             /* Symnum of .bf for this function */
  49     struct saved_bf_symnum *next;
  50   };
  51
  52 typedef struct saved_fcn SAVED_FUNCTION, *SAVED_FUNCTION_PTR;
  53 typedef struct saved_bf_symnum SAVED_BF, *SAVED_BF_PTR;
  54
  55 /* Local functions */
  56
  57 extern void _initialize_f_language (void);
  58 #if 0
  59 static void clear_function_list (void);
  60 static long get_bf_for_fcn (long);
  61 static void clear_bf_list (void);
  62 static void patch_all_commons_by_name (char *, CORE_ADDR, int);
  63 static SAVED_F77_COMMON_PTR find_first_common_named (char *);
  64 static void add_common_entry (struct symbol *);
  65 static void add_common_block (char *, CORE_ADDR, int, char *);
  66 static SAVED_FUNCTION *allocate_saved_function_node (void);
  67 static SAVED_BF_PTR allocate_saved_bf_node (void);
  68 static COMMON_ENTRY_PTR allocate_common_entry_node (void);
  69 static SAVED_F77_COMMON_PTR allocate_saved_f77_common_node (void);
  70 static void patch_common_entries (SAVED_F77_COMMON_PTR, CORE_ADDR, int);
  71 #endif
  72
  73 static void f_printchar (int c, struct ui_file * stream);
  74 static void f_emit_char (int c, struct ui_file * stream, int quoter);
  75
  76 /* Print the character C on STREAM as part of the contents of a literal
  77    string whose delimiter is QUOTER.  Note that that format for printing
  78    characters and strings is language specific.
  79    FIXME:  This is a copy of the same function from c-exp.y.  It should
  80    be replaced with a true F77 version.  */
  81
  82 static void
  83 f_emit_char (int c, struct ui_file *stream, int quoter)
  84 {
  85   c &= 0xFF;                    /* Avoid sign bit follies */
  86
  87   if (PRINT_LITERAL_FORM (c))
  88     {
  89       if (c == '\\' || c == quoter)
  90         fputs_filtered ("\\", stream);
  91       fprintf_filtered (stream, "%c", c);
  92     }
  93   else
  94     {
  95       switch (c)
  96         {
  97         case '\n':
  98           fputs_filtered ("\\n", stream);
  99           break;
 100         case '\b':
 101           fputs_filtered ("\\b", stream);
 102           break;
 103         case '\t':
 104           fputs_filtered ("\\t", stream);
 105           break;
 106         case '\f':
 107           fputs_filtered ("\\f", stream);
 108           break;
 109         case '\r':
 110           fputs_filtered ("\\r", stream);
 111           break;
 112         case '\033':
 113           fputs_filtered ("\\e", stream);
 114           break;
 115         case '\007':
 116           fputs_filtered ("\\a", stream);
 117           break;
 118         default:
 119           fprintf_filtered (stream, "\\%.3o", (unsigned int) c);
 120           break;
 121         }
 122     }
 123 }
 124
 125 /* FIXME:  This is a copy of the same function from c-exp.y.  It should
 126    be replaced with a true F77version. */
 127
 128 static void
 129 f_printchar (int c, struct ui_file *stream)
 130 {
 131   fputs_filtered ("'", stream);
 132   LA_EMIT_CHAR (c, stream, '\'');
 133   fputs_filtered ("'", stream);
 134 }
 135
 136 /* Print the character string STRING, printing at most LENGTH characters.
 137    Printing stops early if the number hits print_max; repeat counts
 138    are printed as appropriate.  Print ellipses at the end if we
 139    had to stop before printing LENGTH characters, or if FORCE_ELLIPSES.
 140    FIXME:  This is a copy of the same function from c-exp.y.  It should
 141    be replaced with a true F77 version. */
 142
 143 static void
 144 f_printstr (struct ui_file *stream, const gdb_byte *string,
 145             unsigned int length, int width, int force_ellipses)
 146 {
 147   unsigned int i;
 148   unsigned int things_printed = 0;
 149   int in_quotes = 0;
 150   int need_comma = 0;
 151
 152   if (length == 0)
 153     {
 154       fputs_filtered ("''", gdb_stdout);
 155       return;
 156     }
 157
 158   for (i = 0; i < length && things_printed < print_max; ++i)
 159     {
 160       /* Position of the character we are examining
 161          to see whether it is repeated.  */
 162       unsigned int rep1;
 163       /* Number of repetitions we have detected so far.  */
 164       unsigned int reps;
 165
 166       QUIT;
 167
 168       if (need_comma)
 169         {
 170           fputs_filtered (", ", stream);
 171           need_comma = 0;
 172         }
 173
 174       rep1 = i + 1;
 175       reps = 1;
 176       while (rep1 < length && string[rep1] == string[i])
 177         {
 178           ++rep1;
 179           ++reps;
 180         }
 181
 182       if (reps > repeat_count_threshold)
 183         {
 184           if (in_quotes)
 185             {
 186               if (inspect_it)
 187                 fputs_filtered ("\\', ", stream);
 188               else
 189                 fputs_filtered ("', ", stream);
 190               in_quotes = 0;
 191             }
 192           f_printchar (string[i], stream);
 193           fprintf_filtered (stream, " <repeats %u times>", reps);
 194           i = rep1 - 1;
 195           things_printed += repeat_count_threshold;
 196           need_comma = 1;
 197         }
 198       else
 199         {
 200           if (!in_quotes)
 201             {
 202               if (inspect_it)
 203                 fputs_filtered ("\\'", stream);
 204               else
 205                 fputs_filtered ("'", stream);
 206               in_quotes = 1;
 207             }
 208           LA_EMIT_CHAR (string[i], stream, '"');
 209           ++things_printed;
 210         }
 211     }
 212
 213   /* Terminate the quotes if necessary.  */
 214   if (in_quotes)
 215     {
 216       if (inspect_it)
 217         fputs_filtered ("\\'", stream);
 218       else
 219         fputs_filtered ("'", stream);
 220     }
 221
 222   if (force_ellipses || i < length)
 223     fputs_filtered ("...", stream);
 224 }
 225 \f
 226
 227 /* Table of operators and their precedences for printing expressions.  */
 228
 229 static const struct op_print f_op_print_tab[] =
 230 {
 231   {"+", BINOP_ADD, PREC_ADD, 0},
 232   {"+", UNOP_PLUS, PREC_PREFIX, 0},
 233   {"-", BINOP_SUB, PREC_ADD, 0},
 234   {"-", UNOP_NEG, PREC_PREFIX, 0},
 235   {"*", BINOP_MUL, PREC_MUL, 0},
 236   {"/", BINOP_DIV, PREC_MUL, 0},
 237   {"DIV", BINOP_INTDIV, PREC_MUL, 0},
 238   {"MOD", BINOP_REM, PREC_MUL, 0},
 239   {"=", BINOP_ASSIGN, PREC_ASSIGN, 1},
 240   {".OR.", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
 241   {".AND.", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
 242   {".NOT.", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
 243   {".EQ.", BINOP_EQUAL, PREC_EQUAL, 0},
 244   {".NE.", BINOP_NOTEQUAL, PREC_EQUAL, 0},
 245   {".LE.", BINOP_LEQ, PREC_ORDER, 0},
 246   {".GE.", BINOP_GEQ, PREC_ORDER, 0},
 247   {".GT.", BINOP_GTR, PREC_ORDER, 0},
 248   {".LT.", BINOP_LESS, PREC_ORDER, 0},
 249   {"**", UNOP_IND, PREC_PREFIX, 0},
 250   {"@", BINOP_REPEAT, PREC_REPEAT, 0},
 251   {NULL, 0, 0, 0}
 252 };
 253 \f
 254 enum f_primitive_types {
 255   f_primitive_type_character,
 256   f_primitive_type_logical,
 257   f_primitive_type_logical_s1,
 258   f_primitive_type_logical_s2,
 259   f_primitive_type_integer,
 260   f_primitive_type_integer_s2,
 261   f_primitive_type_real,
 262   f_primitive_type_real_s8,
 263   f_primitive_type_real_s16,
 264   f_primitive_type_complex_s8,
 265   f_primitive_type_complex_s16,
 266   f_primitive_type_void,
 267   nr_f_primitive_types
 268 };
 269
 270 static void
 271 f_language_arch_info (struct gdbarch *gdbarch,
 272                       struct language_arch_info *lai)
 273 {
 274   const struct builtin_f_type *builtin = builtin_f_type (gdbarch);
 275
 276   lai->string_char_type = builtin->builtin_character;
 277   lai->primitive_type_vector
 278     = GDBARCH_OBSTACK_CALLOC (gdbarch, nr_f_primitive_types + 1,
 279                               struct type *);
 280
 281   lai->primitive_type_vector [f_primitive_type_character]
 282     = builtin->builtin_character;
 283   lai->primitive_type_vector [f_primitive_type_logical]
 284     = builtin->builtin_logical;
 285   lai->primitive_type_vector [f_primitive_type_logical_s1]
 286     = builtin->builtin_logical_s1;
 287   lai->primitive_type_vector [f_primitive_type_logical_s2]
 288     = builtin->builtin_logical_s2;
 289   lai->primitive_type_vector [f_primitive_type_real]
 290     = builtin->builtin_real;
 291   lai->primitive_type_vector [f_primitive_type_real_s8]
 292     = builtin->builtin_real_s8;
 293   lai->primitive_type_vector [f_primitive_type_real_s16]
 294     = builtin->builtin_real_s16;
 295   lai->primitive_type_vector [f_primitive_type_complex_s8]
 296     = builtin->builtin_complex_s8;
 297   lai->primitive_type_vector [f_primitive_type_complex_s16]
 298     = builtin->builtin_complex_s16;
 299   lai->primitive_type_vector [f_primitive_type_void]
 300     = builtin->builtin_void;
 301
 302   lai->bool_type_symbol = "logical";
 303   lai->bool_type_default = builtin->builtin_logical_s2;
 304 }
 305
 306 /* This is declared in c-lang.h but it is silly to import that file for what
 307    is already just a hack. */
 308 extern int c_value_print (struct value *, struct ui_file *, int,
 309                           enum val_prettyprint);
 310
 311 const struct language_defn f_language_defn =
 312 {
 313   "fortran",
 314   language_fortran,
 315   range_check_on,
 316   type_check_on,
 317   case_sensitive_off,
 318   array_column_major,
 319   &exp_descriptor_standard,
 320   f_parse,                      /* parser */
 321   f_error,                      /* parser error function */
 322   null_post_parser,
 323   f_printchar,                  /* Print character constant */
 324   f_printstr,                   /* function to print string constant */
 325   f_emit_char,                  /* Function to print a single character */
 326   f_print_type,                 /* Print a type using appropriate syntax */
 327   default_print_typedef,        /* Print a typedef using appropriate syntax */
 328   f_val_print,                  /* Print a value using appropriate syntax */
 329   c_value_print,                /* FIXME */
 330   NULL,                         /* Language specific skip_trampoline */
 331   NULL,                         /* name_of_this */
 332   basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
 333   basic_lookup_transparent_type,/* lookup_transparent_type */
 334   NULL,                         /* Language specific symbol demangler */
 335   NULL,                         /* Language specific class_name_from_physname */
 336   f_op_print_tab,               /* expression operators for printing */
 337   0,                            /* arrays are first-class (not c-style) */
 338   1,                            /* String lower bound */
 339   default_word_break_characters,
 340   default_make_symbol_completion_list,
 341   f_language_arch_info,
 342   default_print_array_index,
 343   default_pass_by_reference,
 344   LANG_MAGIC
 345 };
 346
 347 static void *
 348 build_fortran_types (struct gdbarch *gdbarch)
 349 {
 350   struct builtin_f_type *builtin_f_type
 351     = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct builtin_f_type);
 352
 353   builtin_f_type->builtin_void =
 354     init_type (TYPE_CODE_VOID, 1,
 355                0,
 356                "VOID", (struct objfile *) NULL);
 357
 358   builtin_f_type->builtin_character =
 359     init_type (TYPE_CODE_INT, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 360                0,
 361                "character", (struct objfile *) NULL);
 362
 363   builtin_f_type->builtin_logical_s1 =
 364     init_type (TYPE_CODE_BOOL, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 365                TYPE_FLAG_UNSIGNED,
 366                "logical*1", (struct objfile *) NULL);
 367
 368   builtin_f_type->builtin_integer_s2 =
 369     init_type (TYPE_CODE_INT,
 370                gdbarch_short_bit (gdbarch) / TARGET_CHAR_BIT,
 371                0, "integer*2", (struct objfile *) NULL);
 372
 373   builtin_f_type->builtin_logical_s2 =
 374     init_type (TYPE_CODE_BOOL,
 375                gdbarch_short_bit (gdbarch) / TARGET_CHAR_BIT,
 376                TYPE_FLAG_UNSIGNED, "logical*2", (struct objfile *) NULL);
 377
 378   builtin_f_type->builtin_integer =
 379     init_type (TYPE_CODE_INT,
 380                gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT,
 381                0, "integer", (struct objfile *) NULL);
 382
 383   builtin_f_type->builtin_logical =
 384     init_type (TYPE_CODE_BOOL,
 385                gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT,
 386                TYPE_FLAG_UNSIGNED, "logical*4", (struct objfile *) NULL);
 387
 388   builtin_f_type->builtin_real =
 389     init_type (TYPE_CODE_FLT,
 390                gdbarch_float_bit (gdbarch) / TARGET_CHAR_BIT,
 391                0,
 392                "real", (struct objfile *) NULL);
 393
 394   builtin_f_type->builtin_real_s8 =
 395     init_type (TYPE_CODE_FLT,
 396                gdbarch_double_bit (gdbarch) / TARGET_CHAR_BIT,
 397                0,
 398                "real*8", (struct objfile *) NULL);
 399
 400   builtin_f_type->builtin_real_s16 =
 401     init_type (TYPE_CODE_FLT,
 402                gdbarch_long_double_bit (gdbarch) / TARGET_CHAR_BIT,
 403                0,
 404                "real*16", (struct objfile *) NULL);
 405
 406   builtin_f_type->builtin_complex_s8 =
 407     init_type (TYPE_CODE_COMPLEX,
 408                2 * gdbarch_float_bit (gdbarch) / TARGET_CHAR_BIT,
 409                0,
 410                "complex*8", (struct objfile *) NULL);
 411   TYPE_TARGET_TYPE (builtin_f_type->builtin_complex_s8)
 412     = builtin_f_type->builtin_real;
 413
 414   builtin_f_type->builtin_complex_s16 =
 415     init_type (TYPE_CODE_COMPLEX,
 416                2 * gdbarch_double_bit (gdbarch) / TARGET_CHAR_BIT,
 417                0,
 418                "complex*16", (struct objfile *) NULL);
 419   TYPE_TARGET_TYPE (builtin_f_type->builtin_complex_s16)
 420     = builtin_f_type->builtin_real_s8;
 421
 422   /* We have a new size == 4 double floats for the
 423      complex*32 data type */
 424
 425   builtin_f_type->builtin_complex_s32 =
 426     init_type (TYPE_CODE_COMPLEX,
 427                2 * gdbarch_long_double_bit (gdbarch) / TARGET_CHAR_BIT,
 428                0,
 429                "complex*32", (struct objfile *) NULL);
 430   TYPE_TARGET_TYPE (builtin_f_type->builtin_complex_s32)
 431     = builtin_f_type->builtin_real_s16;
 432
 433   return builtin_f_type;
 434 }
 435
 436 static struct gdbarch_data *f_type_data;
 437
 438 const struct builtin_f_type *
 439 builtin_f_type (struct gdbarch *gdbarch)
 440 {
 441   return gdbarch_data (gdbarch, f_type_data);
 442 }
 443
 444 void
 445 _initialize_f_language (void)
 446 {
 447   f_type_data = gdbarch_data_register_post_init (build_fortran_types);
 448
 449   add_language (&f_language_defn);
 450 }
 451
 452 #if 0
 453 static SAVED_BF_PTR
 454 allocate_saved_bf_node (void)
 455 {
 456   SAVED_BF_PTR new;
 457
 458   new = (SAVED_BF_PTR) xmalloc (sizeof (SAVED_BF));
 459   return (new);
 460 }
 461
 462 static SAVED_FUNCTION *
 463 allocate_saved_function_node (void)
 464 {
 465   SAVED_FUNCTION *new;
 466
 467   new = (SAVED_FUNCTION *) xmalloc (sizeof (SAVED_FUNCTION));
 468   return (new);
 469 }
 470
 471 static SAVED_F77_COMMON_PTR
 472 allocate_saved_f77_common_node (void)
 473 {
 474   SAVED_F77_COMMON_PTR new;
 475
 476   new = (SAVED_F77_COMMON_PTR) xmalloc (sizeof (SAVED_F77_COMMON));
 477   return (new);
 478 }
 479
 480 static COMMON_ENTRY_PTR
 481 allocate_common_entry_node (void)
 482 {
 483   COMMON_ENTRY_PTR new;
 484
 485   new = (COMMON_ENTRY_PTR) xmalloc (sizeof (COMMON_ENTRY));
 486   return (new);
 487 }
 488 #endif
 489
 490 SAVED_F77_COMMON_PTR head_common_list = NULL;   /* Ptr to 1st saved COMMON  */
 491 SAVED_F77_COMMON_PTR tail_common_list = NULL;   /* Ptr to last saved COMMON  */
 492 SAVED_F77_COMMON_PTR current_common = NULL;     /* Ptr to current COMMON */
 493
 494 #if 0
 495 static SAVED_BF_PTR saved_bf_list = NULL;       /* Ptr to (.bf,function)
 496                                                    list */
 497 static SAVED_BF_PTR saved_bf_list_end = NULL;   /* Ptr to above list's end */
 498 static SAVED_BF_PTR current_head_bf_list = NULL;        /* Current head of above list
 499                                                          */
 500
 501 static SAVED_BF_PTR tmp_bf_ptr; /* Generic temporary for use
 502                                    in macros */
 503
 504 /* The following function simply enters a given common block onto
 505    the global common block chain */
 506
 507 static void
 508 add_common_block (char *name, CORE_ADDR offset, int secnum, char *func_stab)
 509 {
 510   SAVED_F77_COMMON_PTR tmp;
 511   char *c, *local_copy_func_stab;
 512
 513   /* If the COMMON block we are trying to add has a blank
 514      name (i.e. "#BLNK_COM") then we set it to __BLANK
 515      because the darn "#" character makes GDB's input
 516      parser have fits. */
 517
 518
 519   if (strcmp (name, BLANK_COMMON_NAME_ORIGINAL) == 0
 520       || strcmp (name, BLANK_COMMON_NAME_MF77) == 0)
 521     {
 522
 523       xfree (name);
 524       name = alloca (strlen (BLANK_COMMON_NAME_LOCAL) + 1);
 525       strcpy (name, BLANK_COMMON_NAME_LOCAL);
 526     }
 527
 528   tmp = allocate_saved_f77_common_node ();
 529
 530   local_copy_func_stab = xmalloc (strlen (func_stab) + 1);
 531   strcpy (local_copy_func_stab, func_stab);
 532
 533   tmp->name = xmalloc (strlen (name) + 1);
 534
 535   /* local_copy_func_stab is a stabstring, let us first extract the
 536      function name from the stab by NULLing out the ':' character. */
 537
 538
 539   c = NULL;
 540   c = strchr (local_copy_func_stab, ':');
 541
 542   if (c)
 543     *c = '\0';
 544   else
 545     error (_("Malformed function STAB found in add_common_block()"));
 546
 547
 548   tmp->owning_function = xmalloc (strlen (local_copy_func_stab) + 1);
 549
 550   strcpy (tmp->owning_function, local_copy_func_stab);
 551
 552   strcpy (tmp->name, name);
 553   tmp->offset = offset;
 554   tmp->next = NULL;
 555   tmp->entries = NULL;
 556   tmp->secnum = secnum;
 557
 558   current_common = tmp;
 559
 560   if (head_common_list == NULL)
 561     {
 562       head_common_list = tail_common_list = tmp;
 563     }
 564   else
 565     {
 566       tail_common_list->next = tmp;
 567       tail_common_list = tmp;
 568     }
 569 }
 570 #endif
 571
 572 /* The following function simply enters a given common entry onto
 573    the "current_common" block that has been saved away. */
 574
 575 #if 0
 576 static void
 577 add_common_entry (struct symbol *entry_sym_ptr)
 578 {
 579   COMMON_ENTRY_PTR tmp;
 580
 581
 582
 583   /* The order of this list is important, since
 584      we expect the entries to appear in decl.
 585      order when we later issue "info common" calls */
 586
 587   tmp = allocate_common_entry_node ();
 588
 589   tmp->next = NULL;
 590   tmp->symbol = entry_sym_ptr;
 591
 592   if (current_common == NULL)
 593     error (_("Attempt to add COMMON entry with no block open!"));
 594   else
 595     {
 596       if (current_common->entries == NULL)
 597         {
 598           current_common->entries = tmp;
 599           current_common->end_of_entries = tmp;
 600         }
 601       else
 602         {
 603           current_common->end_of_entries->next = tmp;
 604           current_common->end_of_entries = tmp;
 605         }
 606     }
 607 }
 608 #endif
 609
 610 /* This routine finds the first encountred COMMON block named "name" */
 611
 612 #if 0
 613 static SAVED_F77_COMMON_PTR
 614 find_first_common_named (char *name)
 615 {
 616
 617   SAVED_F77_COMMON_PTR tmp;
 618
 619   tmp = head_common_list;
 620
 621   while (tmp != NULL)
 622     {
 623       if (strcmp (tmp->name, name) == 0)
 624         return (tmp);
 625       else
 626         tmp = tmp->next;
 627     }
 628   return (NULL);
 629 }
 630 #endif
 631
 632 /* This routine finds the first encountred COMMON block named "name"
 633    that belongs to function funcname */
 634
 635 SAVED_F77_COMMON_PTR
 636 find_common_for_function (char *name, char *funcname)
 637 {
 638
 639   SAVED_F77_COMMON_PTR tmp;
 640
 641   tmp = head_common_list;
 642
 643   while (tmp != NULL)
 644     {
 645       if (strcmp (tmp->name, name) == 0
 646           && strcmp (tmp->owning_function, funcname) == 0)
 647         return (tmp);
 648       else
 649         tmp = tmp->next;
 650     }
 651   return (NULL);
 652 }
 653
 654
 655 #if 0
 656
 657 /* The following function is called to patch up the offsets
 658    for the statics contained in the COMMON block named
 659    "name."  */
 660
 661 static void
 662 patch_common_entries (SAVED_F77_COMMON_PTR blk, CORE_ADDR offset, int secnum)
 663 {
 664   COMMON_ENTRY_PTR entry;
 665
 666   blk->offset = offset;         /* Keep this around for future use. */
 667
 668   entry = blk->entries;
 669
 670   while (entry != NULL)
 671     {
 672       SYMBOL_VALUE (entry->symbol) += offset;
 673       SYMBOL_SECTION (entry->symbol) = secnum;
 674
 675       entry = entry->next;
 676     }
 677   blk->secnum = secnum;
 678 }
 679
 680 /* Patch all commons named "name" that need patching.Since COMMON
 681    blocks occur with relative infrequency, we simply do a linear scan on
 682    the name.  Eventually, the best way to do this will be a
 683    hashed-lookup.  Secnum is the section number for the .bss section
 684    (which is where common data lives). */
 685
 686 static void
 687 patch_all_commons_by_name (char *name, CORE_ADDR offset, int secnum)
 688 {
 689
 690   SAVED_F77_COMMON_PTR tmp;
 691
 692   /* For blank common blocks, change the canonical reprsentation
 693      of a blank name */
 694
 695   if (strcmp (name, BLANK_COMMON_NAME_ORIGINAL) == 0
 696       || strcmp (name, BLANK_COMMON_NAME_MF77) == 0)
 697     {
 698       xfree (name);
 699       name = alloca (strlen (BLANK_COMMON_NAME_LOCAL) + 1);
 700       strcpy (name, BLANK_COMMON_NAME_LOCAL);
 701     }
 702
 703   tmp = head_common_list;
 704
 705   while (tmp != NULL)
 706     {
 707       if (COMMON_NEEDS_PATCHING (tmp))
 708         if (strcmp (tmp->name, name) == 0)
 709           patch_common_entries (tmp, offset, secnum);
 710
 711       tmp = tmp->next;
 712     }
 713 }
 714 #endif
 715
 716 /* This macro adds the symbol-number for the start of the function
 717    (the symbol number of the .bf) referenced by symnum_fcn to a
 718    list.  This list, in reality should be a FIFO queue but since
 719    #line pragmas sometimes cause line ranges to get messed up
 720    we simply create a linear list.  This list can then be searched
 721    first by a queueing algorithm and upon failure fall back to
 722    a linear scan. */
 723
 724 #if 0
 725 #define ADD_BF_SYMNUM(bf_sym,fcn_sym) \
 726   \
 727   if (saved_bf_list == NULL) \
 728 { \
 729     tmp_bf_ptr = allocate_saved_bf_node(); \
 730       \
 731         tmp_bf_ptr->symnum_bf = (bf_sym); \
 732           tmp_bf_ptr->symnum_fcn = (fcn_sym);  \
 733             tmp_bf_ptr->next = NULL; \
 734               \
 735                 current_head_bf_list = saved_bf_list = tmp_bf_ptr; \
 736                   saved_bf_list_end = tmp_bf_ptr; \
 737                   } \
 738 else \
 739 {  \
 740      tmp_bf_ptr = allocate_saved_bf_node(); \
 741        \
 742          tmp_bf_ptr->symnum_bf = (bf_sym);  \
 743            tmp_bf_ptr->symnum_fcn = (fcn_sym);  \
 744              tmp_bf_ptr->next = NULL;  \
 745                \
 746                  saved_bf_list_end->next = tmp_bf_ptr;  \
 747                    saved_bf_list_end = tmp_bf_ptr; \
 748                    }
 749 #endif
 750
 751 /* This function frees the entire (.bf,function) list */
 752
 753 #if 0
 754 static void
 755 clear_bf_list (void)
 756 {
 757
 758   SAVED_BF_PTR tmp = saved_bf_list;
 759   SAVED_BF_PTR next = NULL;
 760
 761   while (tmp != NULL)
 762     {
 763       next = tmp->next;
 764       xfree (tmp);
 765       tmp = next;
 766     }
 767   saved_bf_list = NULL;
 768 }
 769 #endif
 770
 771 int global_remote_debug;
 772
 773 #if 0
 774
 775 static long
 776 get_bf_for_fcn (long the_function)
 777 {
 778   SAVED_BF_PTR tmp;
 779   int nprobes = 0;
 780
 781   /* First use a simple queuing algorithm (i.e. look and see if the
 782      item at the head of the queue is the one you want)  */
 783
 784   if (saved_bf_list == NULL)
 785     internal_error (__FILE__, __LINE__,
 786                     _("cannot get .bf node off empty list"));
 787
 788   if (current_head_bf_list != NULL)
 789     if (current_head_bf_list->symnum_fcn == the_function)
 790       {
 791         if (global_remote_debug)
 792           fprintf_unfiltered (gdb_stderr, "*");
 793
 794         tmp = current_head_bf_list;
 795         current_head_bf_list = current_head_bf_list->next;
 796         return (tmp->symnum_bf);
 797       }
 798
 799   /* If the above did not work (probably because #line directives were
 800      used in the sourcefile and they messed up our internal tables) we now do
 801      the ugly linear scan */
 802
 803   if (global_remote_debug)
 804     fprintf_unfiltered (gdb_stderr, "\ndefaulting to linear scan\n");
 805
 806   nprobes = 0;
 807   tmp = saved_bf_list;
 808   while (tmp != NULL)
 809     {
 810       nprobes++;
 811       if (tmp->symnum_fcn == the_function)
 812         {
 813           if (global_remote_debug)
 814             fprintf_unfiltered (gdb_stderr, "Found in %d probes\n", nprobes);
 815           current_head_bf_list = tmp->next;
 816           return (tmp->symnum_bf);
 817         }
 818       tmp = tmp->next;
 819     }
 820
 821   return (-1);
 822 }
 823
 824 static SAVED_FUNCTION_PTR saved_function_list = NULL;
 825 static SAVED_FUNCTION_PTR saved_function_list_end = NULL;
 826
 827 static void
 828 clear_function_list (void)
 829 {
 830   SAVED_FUNCTION_PTR tmp = saved_function_list;
 831   SAVED_FUNCTION_PTR next = NULL;
 832
 833   while (tmp != NULL)
 834     {
 835       next = tmp->next;
 836       xfree (tmp);
 837       tmp = next;
 838     }
 839
 840   saved_function_list = NULL;
 841 }
 842 #endif