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, 2009 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 type *type, struct ui_file * stream);
  74 static void f_emit_char (int c, struct type *type,
  75                          struct ui_file * stream, int quoter);
  76
  77 /* Print the character C on STREAM as part of the contents of a literal
  78    string whose delimiter is QUOTER.  Note that that format for printing
  79    characters and strings is language specific.
  80    FIXME:  This is a copy of the same function from c-exp.y.  It should
  81    be replaced with a true F77 version.  */
  82
  83 static void
  84 f_emit_char (int c, struct type *type, struct ui_file *stream, int quoter)
  85 {
  86   c &= 0xFF;                    /* Avoid sign bit follies */
  87
  88   if (PRINT_LITERAL_FORM (c))
  89     {
  90       if (c == '\\' || c == quoter)
  91         fputs_filtered ("\\", stream);
  92       fprintf_filtered (stream, "%c", c);
  93     }
  94   else
  95     {
  96       switch (c)
  97         {
  98         case '\n':
  99           fputs_filtered ("\\n", stream);
 100           break;
 101         case '\b':
 102           fputs_filtered ("\\b", stream);
 103           break;
 104         case '\t':
 105           fputs_filtered ("\\t", stream);
 106           break;
 107         case '\f':
 108           fputs_filtered ("\\f", stream);
 109           break;
 110         case '\r':
 111           fputs_filtered ("\\r", stream);
 112           break;
 113         case '\033':
 114           fputs_filtered ("\\e", stream);
 115           break;
 116         case '\007':
 117           fputs_filtered ("\\a", stream);
 118           break;
 119         default:
 120           fprintf_filtered (stream, "\\%.3o", (unsigned int) c);
 121           break;
 122         }
 123     }
 124 }
 125
 126 /* FIXME:  This is a copy of the same function from c-exp.y.  It should
 127    be replaced with a true F77version. */
 128
 129 static void
 130 f_printchar (int c, struct type *type, struct ui_file *stream)
 131 {
 132   fputs_filtered ("'", stream);
 133   LA_EMIT_CHAR (c, type, stream, '\'');
 134   fputs_filtered ("'", stream);
 135 }
 136
 137 /* Print the character string STRING, printing at most LENGTH characters.
 138    Printing stops early if the number hits print_max; repeat counts
 139    are printed as appropriate.  Print ellipses at the end if we
 140    had to stop before printing LENGTH characters, or if FORCE_ELLIPSES.
 141    FIXME:  This is a copy of the same function from c-exp.y.  It should
 142    be replaced with a true F77 version. */
 143
 144 static void
 145 f_printstr (struct ui_file *stream, struct type *type, const gdb_byte *string,
 146             unsigned int length, int force_ellipses,
 147             const struct value_print_options *options)
 148 {
 149   unsigned int i;
 150   unsigned int things_printed = 0;
 151   int in_quotes = 0;
 152   int need_comma = 0;
 153   int width = TYPE_LENGTH (type);
 154
 155   if (length == 0)
 156     {
 157       fputs_filtered ("''", gdb_stdout);
 158       return;
 159     }
 160
 161   for (i = 0; i < length && things_printed < options->print_max; ++i)
 162     {
 163       /* Position of the character we are examining
 164          to see whether it is repeated.  */
 165       unsigned int rep1;
 166       /* Number of repetitions we have detected so far.  */
 167       unsigned int reps;
 168
 169       QUIT;
 170
 171       if (need_comma)
 172         {
 173           fputs_filtered (", ", stream);
 174           need_comma = 0;
 175         }
 176
 177       rep1 = i + 1;
 178       reps = 1;
 179       while (rep1 < length && string[rep1] == string[i])
 180         {
 181           ++rep1;
 182           ++reps;
 183         }
 184
 185       if (reps > options->repeat_count_threshold)
 186         {
 187           if (in_quotes)
 188             {
 189               if (options->inspect_it)
 190                 fputs_filtered ("\\', ", stream);
 191               else
 192                 fputs_filtered ("', ", stream);
 193               in_quotes = 0;
 194             }
 195           f_printchar (string[i], type, stream);
 196           fprintf_filtered (stream, " <repeats %u times>", reps);
 197           i = rep1 - 1;
 198           things_printed += options->repeat_count_threshold;
 199           need_comma = 1;
 200         }
 201       else
 202         {
 203           if (!in_quotes)
 204             {
 205               if (options->inspect_it)
 206                 fputs_filtered ("\\'", stream);
 207               else
 208                 fputs_filtered ("'", stream);
 209               in_quotes = 1;
 210             }
 211           LA_EMIT_CHAR (string[i], type, stream, '"');
 212           ++things_printed;
 213         }
 214     }
 215
 216   /* Terminate the quotes if necessary.  */
 217   if (in_quotes)
 218     {
 219       if (options->inspect_it)
 220         fputs_filtered ("\\'", stream);
 221       else
 222         fputs_filtered ("'", stream);
 223     }
 224
 225   if (force_ellipses || i < length)
 226     fputs_filtered ("...", stream);
 227 }
 228 \f
 229
 230 /* Table of operators and their precedences for printing expressions.  */
 231
 232 static const struct op_print f_op_print_tab[] =
 233 {
 234   {"+", BINOP_ADD, PREC_ADD, 0},
 235   {"+", UNOP_PLUS, PREC_PREFIX, 0},
 236   {"-", BINOP_SUB, PREC_ADD, 0},
 237   {"-", UNOP_NEG, PREC_PREFIX, 0},
 238   {"*", BINOP_MUL, PREC_MUL, 0},
 239   {"/", BINOP_DIV, PREC_MUL, 0},
 240   {"DIV", BINOP_INTDIV, PREC_MUL, 0},
 241   {"MOD", BINOP_REM, PREC_MUL, 0},
 242   {"=", BINOP_ASSIGN, PREC_ASSIGN, 1},
 243   {".OR.", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
 244   {".AND.", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
 245   {".NOT.", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
 246   {".EQ.", BINOP_EQUAL, PREC_EQUAL, 0},
 247   {".NE.", BINOP_NOTEQUAL, PREC_EQUAL, 0},
 248   {".LE.", BINOP_LEQ, PREC_ORDER, 0},
 249   {".GE.", BINOP_GEQ, PREC_ORDER, 0},
 250   {".GT.", BINOP_GTR, PREC_ORDER, 0},
 251   {".LT.", BINOP_LESS, PREC_ORDER, 0},
 252   {"**", UNOP_IND, PREC_PREFIX, 0},
 253   {"@", BINOP_REPEAT, PREC_REPEAT, 0},
 254   {NULL, 0, 0, 0}
 255 };
 256 \f
 257 enum f_primitive_types {
 258   f_primitive_type_character,
 259   f_primitive_type_logical,
 260   f_primitive_type_logical_s1,
 261   f_primitive_type_logical_s2,
 262   f_primitive_type_integer,
 263   f_primitive_type_integer_s2,
 264   f_primitive_type_real,
 265   f_primitive_type_real_s8,
 266   f_primitive_type_real_s16,
 267   f_primitive_type_complex_s8,
 268   f_primitive_type_complex_s16,
 269   f_primitive_type_void,
 270   nr_f_primitive_types
 271 };
 272
 273 static void
 274 f_language_arch_info (struct gdbarch *gdbarch,
 275                       struct language_arch_info *lai)
 276 {
 277   const struct builtin_f_type *builtin = builtin_f_type (gdbarch);
 278
 279   lai->string_char_type = builtin->builtin_character;
 280   lai->primitive_type_vector
 281     = GDBARCH_OBSTACK_CALLOC (gdbarch, nr_f_primitive_types + 1,
 282                               struct type *);
 283
 284   lai->primitive_type_vector [f_primitive_type_character]
 285     = builtin->builtin_character;
 286   lai->primitive_type_vector [f_primitive_type_logical]
 287     = builtin->builtin_logical;
 288   lai->primitive_type_vector [f_primitive_type_logical_s1]
 289     = builtin->builtin_logical_s1;
 290   lai->primitive_type_vector [f_primitive_type_logical_s2]
 291     = builtin->builtin_logical_s2;
 292   lai->primitive_type_vector [f_primitive_type_real]
 293     = builtin->builtin_real;
 294   lai->primitive_type_vector [f_primitive_type_real_s8]
 295     = builtin->builtin_real_s8;
 296   lai->primitive_type_vector [f_primitive_type_real_s16]
 297     = builtin->builtin_real_s16;
 298   lai->primitive_type_vector [f_primitive_type_complex_s8]
 299     = builtin->builtin_complex_s8;
 300   lai->primitive_type_vector [f_primitive_type_complex_s16]
 301     = builtin->builtin_complex_s16;
 302   lai->primitive_type_vector [f_primitive_type_void]
 303     = builtin->builtin_void;
 304
 305   lai->bool_type_symbol = "logical";
 306   lai->bool_type_default = builtin->builtin_logical_s2;
 307 }
 308
 309 /* This is declared in c-lang.h but it is silly to import that file for what
 310    is already just a hack. */
 311 extern int c_value_print (struct value *, struct ui_file *,
 312                           const struct value_print_options *);
 313
 314 const struct language_defn f_language_defn =
 315 {
 316   "fortran",
 317   language_fortran,
 318   range_check_on,
 319   type_check_on,
 320   case_sensitive_off,
 321   array_column_major,
 322   macro_expansion_no,
 323   &exp_descriptor_standard,
 324   f_parse,                      /* parser */
 325   f_error,                      /* parser error function */
 326   null_post_parser,
 327   f_printchar,                  /* Print character constant */
 328   f_printstr,                   /* function to print string constant */
 329   f_emit_char,                  /* Function to print a single character */
 330   f_print_type,                 /* Print a type using appropriate syntax */
 331   default_print_typedef,        /* Print a typedef using appropriate syntax */
 332   f_val_print,                  /* Print a value using appropriate syntax */
 333   c_value_print,                /* FIXME */
 334   NULL,                         /* Language specific skip_trampoline */
 335   NULL,                         /* name_of_this */
 336   basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
 337   basic_lookup_transparent_type,/* lookup_transparent_type */
 338   NULL,                         /* Language specific symbol demangler */
 339   NULL,                         /* Language specific class_name_from_physname */
 340   f_op_print_tab,               /* expression operators for printing */
 341   0,                            /* arrays are first-class (not c-style) */
 342   1,                            /* String lower bound */
 343   default_word_break_characters,
 344   default_make_symbol_completion_list,
 345   f_language_arch_info,
 346   default_print_array_index,
 347   default_pass_by_reference,
 348   default_get_string,
 349   LANG_MAGIC
 350 };
 351
 352 static void *
 353 build_fortran_types (struct gdbarch *gdbarch)
 354 {
 355   struct builtin_f_type *builtin_f_type
 356     = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct builtin_f_type);
 357
 358   builtin_f_type->builtin_void =
 359     init_type (TYPE_CODE_VOID, 1,
 360                0,
 361                "VOID", (struct objfile *) NULL);
 362
 363   builtin_f_type->builtin_character =
 364     init_type (TYPE_CODE_INT, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 365                0,
 366                "character", (struct objfile *) NULL);
 367
 368   builtin_f_type->builtin_logical_s1 =
 369     init_type (TYPE_CODE_BOOL, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 370                TYPE_FLAG_UNSIGNED,
 371                "logical*1", (struct objfile *) NULL);
 372
 373   builtin_f_type->builtin_integer_s2 =
 374     init_type (TYPE_CODE_INT,
 375                gdbarch_short_bit (gdbarch) / TARGET_CHAR_BIT,
 376                0, "integer*2", (struct objfile *) NULL);
 377
 378   builtin_f_type->builtin_logical_s2 =
 379     init_type (TYPE_CODE_BOOL,
 380                gdbarch_short_bit (gdbarch) / TARGET_CHAR_BIT,
 381                TYPE_FLAG_UNSIGNED, "logical*2", (struct objfile *) NULL);
 382
 383   builtin_f_type->builtin_integer =
 384     init_type (TYPE_CODE_INT,
 385                gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT,
 386                0, "integer", (struct objfile *) NULL);
 387
 388   builtin_f_type->builtin_logical =
 389     init_type (TYPE_CODE_BOOL,
 390                gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT,
 391                TYPE_FLAG_UNSIGNED, "logical*4", (struct objfile *) NULL);
 392
 393   builtin_f_type->builtin_real =
 394     init_float_type (gdbarch_float_bit (gdbarch),
 395                      "real", NULL);
 396   builtin_f_type->builtin_real_s8 =
 397     init_float_type (gdbarch_double_bit (gdbarch),
 398                      "real*8", NULL);
 399   builtin_f_type->builtin_real_s16 =
 400     init_float_type (gdbarch_long_double_bit (gdbarch),
 401                      "real*16", NULL);
 402
 403   builtin_f_type->builtin_complex_s8 =
 404     init_complex_type ("complex*8",
 405                        builtin_f_type->builtin_real);
 406   builtin_f_type->builtin_complex_s16 =
 407     init_complex_type ("complex*16",
 408                        builtin_f_type->builtin_real_s8);
 409   builtin_f_type->builtin_complex_s32 =
 410     init_complex_type ("complex*32",
 411                        builtin_f_type->builtin_real_s16);
 412
 413   return builtin_f_type;
 414 }
 415
 416 static struct gdbarch_data *f_type_data;
 417
 418 const struct builtin_f_type *
 419 builtin_f_type (struct gdbarch *gdbarch)
 420 {
 421   return gdbarch_data (gdbarch, f_type_data);
 422 }
 423
 424 void
 425 _initialize_f_language (void)
 426 {
 427   f_type_data = gdbarch_data_register_post_init (build_fortran_types);
 428
 429   add_language (&f_language_defn);
 430 }
 431
 432 #if 0
 433 static SAVED_BF_PTR
 434 allocate_saved_bf_node (void)
 435 {
 436   SAVED_BF_PTR new;
 437
 438   new = (SAVED_BF_PTR) xmalloc (sizeof (SAVED_BF));
 439   return (new);
 440 }
 441
 442 static SAVED_FUNCTION *
 443 allocate_saved_function_node (void)
 444 {
 445   SAVED_FUNCTION *new;
 446
 447   new = (SAVED_FUNCTION *) xmalloc (sizeof (SAVED_FUNCTION));
 448   return (new);
 449 }
 450
 451 static SAVED_F77_COMMON_PTR
 452 allocate_saved_f77_common_node (void)
 453 {
 454   SAVED_F77_COMMON_PTR new;
 455
 456   new = (SAVED_F77_COMMON_PTR) xmalloc (sizeof (SAVED_F77_COMMON));
 457   return (new);
 458 }
 459
 460 static COMMON_ENTRY_PTR
 461 allocate_common_entry_node (void)
 462 {
 463   COMMON_ENTRY_PTR new;
 464
 465   new = (COMMON_ENTRY_PTR) xmalloc (sizeof (COMMON_ENTRY));
 466   return (new);
 467 }
 468 #endif
 469
 470 SAVED_F77_COMMON_PTR head_common_list = NULL;   /* Ptr to 1st saved COMMON  */
 471 SAVED_F77_COMMON_PTR tail_common_list = NULL;   /* Ptr to last saved COMMON  */
 472 SAVED_F77_COMMON_PTR current_common = NULL;     /* Ptr to current COMMON */
 473
 474 #if 0
 475 static SAVED_BF_PTR saved_bf_list = NULL;       /* Ptr to (.bf,function)
 476                                                    list */
 477 static SAVED_BF_PTR saved_bf_list_end = NULL;   /* Ptr to above list's end */
 478 static SAVED_BF_PTR current_head_bf_list = NULL;        /* Current head of above list
 479                                                          */
 480
 481 static SAVED_BF_PTR tmp_bf_ptr; /* Generic temporary for use
 482                                    in macros */
 483
 484 /* The following function simply enters a given common block onto
 485    the global common block chain */
 486
 487 static void
 488 add_common_block (char *name, CORE_ADDR offset, int secnum, char *func_stab)
 489 {
 490   SAVED_F77_COMMON_PTR tmp;
 491   char *c, *local_copy_func_stab;
 492
 493   /* If the COMMON block we are trying to add has a blank
 494      name (i.e. "#BLNK_COM") then we set it to __BLANK
 495      because the darn "#" character makes GDB's input
 496      parser have fits. */
 497
 498
 499   if (strcmp (name, BLANK_COMMON_NAME_ORIGINAL) == 0
 500       || strcmp (name, BLANK_COMMON_NAME_MF77) == 0)
 501     {
 502
 503       xfree (name);
 504       name = alloca (strlen (BLANK_COMMON_NAME_LOCAL) + 1);
 505       strcpy (name, BLANK_COMMON_NAME_LOCAL);
 506     }
 507
 508   tmp = allocate_saved_f77_common_node ();
 509
 510   local_copy_func_stab = xmalloc (strlen (func_stab) + 1);
 511   strcpy (local_copy_func_stab, func_stab);
 512
 513   tmp->name = xmalloc (strlen (name) + 1);
 514
 515   /* local_copy_func_stab is a stabstring, let us first extract the
 516      function name from the stab by NULLing out the ':' character. */
 517
 518
 519   c = NULL;
 520   c = strchr (local_copy_func_stab, ':');
 521
 522   if (c)
 523     *c = '\0';
 524   else
 525     error (_("Malformed function STAB found in add_common_block()"));
 526
 527
 528   tmp->owning_function = xmalloc (strlen (local_copy_func_stab) + 1);
 529
 530   strcpy (tmp->owning_function, local_copy_func_stab);
 531
 532   strcpy (tmp->name, name);
 533   tmp->offset = offset;
 534   tmp->next = NULL;
 535   tmp->entries = NULL;
 536   tmp->secnum = secnum;
 537
 538   current_common = tmp;
 539
 540   if (head_common_list == NULL)
 541     {
 542       head_common_list = tail_common_list = tmp;
 543     }
 544   else
 545     {
 546       tail_common_list->next = tmp;
 547       tail_common_list = tmp;
 548     }
 549 }
 550 #endif
 551
 552 /* The following function simply enters a given common entry onto
 553    the "current_common" block that has been saved away. */
 554
 555 #if 0
 556 static void
 557 add_common_entry (struct symbol *entry_sym_ptr)
 558 {
 559   COMMON_ENTRY_PTR tmp;
 560
 561
 562
 563   /* The order of this list is important, since
 564      we expect the entries to appear in decl.
 565      order when we later issue "info common" calls */
 566
 567   tmp = allocate_common_entry_node ();
 568
 569   tmp->next = NULL;
 570   tmp->symbol = entry_sym_ptr;
 571
 572   if (current_common == NULL)
 573     error (_("Attempt to add COMMON entry with no block open!"));
 574   else
 575     {
 576       if (current_common->entries == NULL)
 577         {
 578           current_common->entries = tmp;
 579           current_common->end_of_entries = tmp;
 580         }
 581       else
 582         {
 583           current_common->end_of_entries->next = tmp;
 584           current_common->end_of_entries = tmp;
 585         }
 586     }
 587 }
 588 #endif
 589
 590 /* This routine finds the first encountred COMMON block named "name" */
 591
 592 #if 0
 593 static SAVED_F77_COMMON_PTR
 594 find_first_common_named (char *name)
 595 {
 596
 597   SAVED_F77_COMMON_PTR tmp;
 598
 599   tmp = head_common_list;
 600
 601   while (tmp != NULL)
 602     {
 603       if (strcmp (tmp->name, name) == 0)
 604         return (tmp);
 605       else
 606         tmp = tmp->next;
 607     }
 608   return (NULL);
 609 }
 610 #endif
 611
 612 /* This routine finds the first encountred COMMON block named "name"
 613    that belongs to function funcname */
 614
 615 SAVED_F77_COMMON_PTR
 616 find_common_for_function (char *name, char *funcname)
 617 {
 618
 619   SAVED_F77_COMMON_PTR tmp;
 620
 621   tmp = head_common_list;
 622
 623   while (tmp != NULL)
 624     {
 625       if (strcmp (tmp->name, name) == 0
 626           && strcmp (tmp->owning_function, funcname) == 0)
 627         return (tmp);
 628       else
 629         tmp = tmp->next;
 630     }
 631   return (NULL);
 632 }
 633
 634
 635 #if 0
 636
 637 /* The following function is called to patch up the offsets
 638    for the statics contained in the COMMON block named
 639    "name."  */
 640
 641 static void
 642 patch_common_entries (SAVED_F77_COMMON_PTR blk, CORE_ADDR offset, int secnum)
 643 {
 644   COMMON_ENTRY_PTR entry;
 645
 646   blk->offset = offset;         /* Keep this around for future use. */
 647
 648   entry = blk->entries;
 649
 650   while (entry != NULL)
 651     {
 652       SYMBOL_VALUE (entry->symbol) += offset;
 653       SYMBOL_SECTION (entry->symbol) = secnum;
 654
 655       entry = entry->next;
 656     }
 657   blk->secnum = secnum;
 658 }
 659
 660 /* Patch all commons named "name" that need patching.Since COMMON
 661    blocks occur with relative infrequency, we simply do a linear scan on
 662    the name.  Eventually, the best way to do this will be a
 663    hashed-lookup.  Secnum is the section number for the .bss section
 664    (which is where common data lives). */
 665
 666 static void
 667 patch_all_commons_by_name (char *name, CORE_ADDR offset, int secnum)
 668 {
 669
 670   SAVED_F77_COMMON_PTR tmp;
 671
 672   /* For blank common blocks, change the canonical reprsentation
 673      of a blank name */
 674
 675   if (strcmp (name, BLANK_COMMON_NAME_ORIGINAL) == 0
 676       || strcmp (name, BLANK_COMMON_NAME_MF77) == 0)
 677     {
 678       xfree (name);
 679       name = alloca (strlen (BLANK_COMMON_NAME_LOCAL) + 1);
 680       strcpy (name, BLANK_COMMON_NAME_LOCAL);
 681     }
 682
 683   tmp = head_common_list;
 684
 685   while (tmp != NULL)
 686     {
 687       if (COMMON_NEEDS_PATCHING (tmp))
 688         if (strcmp (tmp->name, name) == 0)
 689           patch_common_entries (tmp, offset, secnum);
 690
 691       tmp = tmp->next;
 692     }
 693 }
 694 #endif
 695
 696 /* This macro adds the symbol-number for the start of the function
 697    (the symbol number of the .bf) referenced by symnum_fcn to a
 698    list.  This list, in reality should be a FIFO queue but since
 699    #line pragmas sometimes cause line ranges to get messed up
 700    we simply create a linear list.  This list can then be searched
 701    first by a queueing algorithm and upon failure fall back to
 702    a linear scan. */
 703
 704 #if 0
 705 #define ADD_BF_SYMNUM(bf_sym,fcn_sym) \
 706   \
 707   if (saved_bf_list == NULL) \
 708 { \
 709     tmp_bf_ptr = allocate_saved_bf_node(); \
 710       \
 711         tmp_bf_ptr->symnum_bf = (bf_sym); \
 712           tmp_bf_ptr->symnum_fcn = (fcn_sym);  \
 713             tmp_bf_ptr->next = NULL; \
 714               \
 715                 current_head_bf_list = saved_bf_list = tmp_bf_ptr; \
 716                   saved_bf_list_end = tmp_bf_ptr; \
 717                   } \
 718 else \
 719 {  \
 720      tmp_bf_ptr = allocate_saved_bf_node(); \
 721        \
 722          tmp_bf_ptr->symnum_bf = (bf_sym);  \
 723            tmp_bf_ptr->symnum_fcn = (fcn_sym);  \
 724              tmp_bf_ptr->next = NULL;  \
 725                \
 726                  saved_bf_list_end->next = tmp_bf_ptr;  \
 727                    saved_bf_list_end = tmp_bf_ptr; \
 728                    }
 729 #endif
 730
 731 /* This function frees the entire (.bf,function) list */
 732
 733 #if 0
 734 static void
 735 clear_bf_list (void)
 736 {
 737
 738   SAVED_BF_PTR tmp = saved_bf_list;
 739   SAVED_BF_PTR next = NULL;
 740
 741   while (tmp != NULL)
 742     {
 743       next = tmp->next;
 744       xfree (tmp);
 745       tmp = next;
 746     }
 747   saved_bf_list = NULL;
 748 }
 749 #endif
 750
 751 int global_remote_debug;
 752
 753 #if 0
 754
 755 static long
 756 get_bf_for_fcn (long the_function)
 757 {
 758   SAVED_BF_PTR tmp;
 759   int nprobes = 0;
 760
 761   /* First use a simple queuing algorithm (i.e. look and see if the
 762      item at the head of the queue is the one you want)  */
 763
 764   if (saved_bf_list == NULL)
 765     internal_error (__FILE__, __LINE__,
 766                     _("cannot get .bf node off empty list"));
 767
 768   if (current_head_bf_list != NULL)
 769     if (current_head_bf_list->symnum_fcn == the_function)
 770       {
 771         if (global_remote_debug)
 772           fprintf_unfiltered (gdb_stderr, "*");
 773
 774         tmp = current_head_bf_list;
 775         current_head_bf_list = current_head_bf_list->next;
 776         return (tmp->symnum_bf);
 777       }
 778
 779   /* If the above did not work (probably because #line directives were
 780      used in the sourcefile and they messed up our internal tables) we now do
 781      the ugly linear scan */
 782
 783   if (global_remote_debug)
 784     fprintf_unfiltered (gdb_stderr, "\ndefaulting to linear scan\n");
 785
 786   nprobes = 0;
 787   tmp = saved_bf_list;
 788   while (tmp != NULL)
 789     {
 790       nprobes++;
 791       if (tmp->symnum_fcn == the_function)
 792         {
 793           if (global_remote_debug)
 794             fprintf_unfiltered (gdb_stderr, "Found in %d probes\n", nprobes);
 795           current_head_bf_list = tmp->next;
 796           return (tmp->symnum_bf);
 797         }
 798       tmp = tmp->next;
 799     }
 800
 801   return (-1);
 802 }
 803
 804 static SAVED_FUNCTION_PTR saved_function_list = NULL;
 805 static SAVED_FUNCTION_PTR saved_function_list_end = NULL;
 806
 807 static void
 808 clear_function_list (void)
 809 {
 810   SAVED_FUNCTION_PTR tmp = saved_function_list;
 811   SAVED_FUNCTION_PTR next = NULL;
 812
 813   while (tmp != NULL)
 814     {
 815       next = tmp->next;
 816       xfree (tmp);
 817       tmp = next;
 818     }
 819
 820   saved_function_list = NULL;
 821 }
 822 #endif