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   macro_expansion_no,
 320   &exp_descriptor_standard,
 321   f_parse,                      /* parser */
 322   f_error,                      /* parser error function */
 323   null_post_parser,
 324   f_printchar,                  /* Print character constant */
 325   f_printstr,                   /* function to print string constant */
 326   f_emit_char,                  /* Function to print a single character */
 327   f_print_type,                 /* Print a type using appropriate syntax */
 328   default_print_typedef,        /* Print a typedef using appropriate syntax */
 329   f_val_print,                  /* Print a value using appropriate syntax */
 330   c_value_print,                /* FIXME */
 331   NULL,                         /* Language specific skip_trampoline */
 332   NULL,                         /* name_of_this */
 333   basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
 334   basic_lookup_transparent_type,/* lookup_transparent_type */
 335   NULL,                         /* Language specific symbol demangler */
 336   NULL,                         /* Language specific class_name_from_physname */
 337   f_op_print_tab,               /* expression operators for printing */
 338   0,                            /* arrays are first-class (not c-style) */
 339   1,                            /* String lower bound */
 340   default_word_break_characters,
 341   default_make_symbol_completion_list,
 342   f_language_arch_info,
 343   default_print_array_index,
 344   default_pass_by_reference,
 345   LANG_MAGIC
 346 };
 347
 348 static void *
 349 build_fortran_types (struct gdbarch *gdbarch)
 350 {
 351   struct builtin_f_type *builtin_f_type
 352     = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct builtin_f_type);
 353
 354   builtin_f_type->builtin_void =
 355     init_type (TYPE_CODE_VOID, 1,
 356                0,
 357                "VOID", (struct objfile *) NULL);
 358
 359   builtin_f_type->builtin_character =
 360     init_type (TYPE_CODE_INT, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 361                0,
 362                "character", (struct objfile *) NULL);
 363
 364   builtin_f_type->builtin_logical_s1 =
 365     init_type (TYPE_CODE_BOOL, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 366                TYPE_FLAG_UNSIGNED,
 367                "logical*1", (struct objfile *) NULL);
 368
 369   builtin_f_type->builtin_integer_s2 =
 370     init_type (TYPE_CODE_INT,
 371                gdbarch_short_bit (gdbarch) / TARGET_CHAR_BIT,
 372                0, "integer*2", (struct objfile *) NULL);
 373
 374   builtin_f_type->builtin_logical_s2 =
 375     init_type (TYPE_CODE_BOOL,
 376                gdbarch_short_bit (gdbarch) / TARGET_CHAR_BIT,
 377                TYPE_FLAG_UNSIGNED, "logical*2", (struct objfile *) NULL);
 378
 379   builtin_f_type->builtin_integer =
 380     init_type (TYPE_CODE_INT,
 381                gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT,
 382                0, "integer", (struct objfile *) NULL);
 383
 384   builtin_f_type->builtin_logical =
 385     init_type (TYPE_CODE_BOOL,
 386                gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT,
 387                TYPE_FLAG_UNSIGNED, "logical*4", (struct objfile *) NULL);
 388
 389   builtin_f_type->builtin_real =
 390     init_type (TYPE_CODE_FLT,
 391                gdbarch_float_bit (gdbarch) / TARGET_CHAR_BIT,
 392                0,
 393                "real", (struct objfile *) NULL);
 394
 395   builtin_f_type->builtin_real_s8 =
 396     init_type (TYPE_CODE_FLT,
 397                gdbarch_double_bit (gdbarch) / TARGET_CHAR_BIT,
 398                0,
 399                "real*8", (struct objfile *) NULL);
 400
 401   builtin_f_type->builtin_real_s16 =
 402     init_type (TYPE_CODE_FLT,
 403                gdbarch_long_double_bit (gdbarch) / TARGET_CHAR_BIT,
 404                0,
 405                "real*16", (struct objfile *) NULL);
 406
 407   builtin_f_type->builtin_complex_s8 =
 408     init_type (TYPE_CODE_COMPLEX,
 409                2 * gdbarch_float_bit (gdbarch) / TARGET_CHAR_BIT,
 410                0,
 411                "complex*8", (struct objfile *) NULL);
 412   TYPE_TARGET_TYPE (builtin_f_type->builtin_complex_s8)
 413     = builtin_f_type->builtin_real;
 414
 415   builtin_f_type->builtin_complex_s16 =
 416     init_type (TYPE_CODE_COMPLEX,
 417                2 * gdbarch_double_bit (gdbarch) / TARGET_CHAR_BIT,
 418                0,
 419                "complex*16", (struct objfile *) NULL);
 420   TYPE_TARGET_TYPE (builtin_f_type->builtin_complex_s16)
 421     = builtin_f_type->builtin_real_s8;
 422
 423   /* We have a new size == 4 double floats for the
 424      complex*32 data type */
 425
 426   builtin_f_type->builtin_complex_s32 =
 427     init_type (TYPE_CODE_COMPLEX,
 428                2 * gdbarch_long_double_bit (gdbarch) / TARGET_CHAR_BIT,
 429                0,
 430                "complex*32", (struct objfile *) NULL);
 431   TYPE_TARGET_TYPE (builtin_f_type->builtin_complex_s32)
 432     = builtin_f_type->builtin_real_s16;
 433
 434   return builtin_f_type;
 435 }
 436
 437 static struct gdbarch_data *f_type_data;
 438
 439 const struct builtin_f_type *
 440 builtin_f_type (struct gdbarch *gdbarch)
 441 {
 442   return gdbarch_data (gdbarch, f_type_data);
 443 }
 444
 445 void
 446 _initialize_f_language (void)
 447 {
 448   f_type_data = gdbarch_data_register_post_init (build_fortran_types);
 449
 450   add_language (&f_language_defn);
 451 }
 452
 453 #if 0
 454 static SAVED_BF_PTR
 455 allocate_saved_bf_node (void)
 456 {
 457   SAVED_BF_PTR new;
 458
 459   new = (SAVED_BF_PTR) xmalloc (sizeof (SAVED_BF));
 460   return (new);
 461 }
 462
 463 static SAVED_FUNCTION *
 464 allocate_saved_function_node (void)
 465 {
 466   SAVED_FUNCTION *new;
 467
 468   new = (SAVED_FUNCTION *) xmalloc (sizeof (SAVED_FUNCTION));
 469   return (new);
 470 }
 471
 472 static SAVED_F77_COMMON_PTR
 473 allocate_saved_f77_common_node (void)
 474 {
 475   SAVED_F77_COMMON_PTR new;
 476
 477   new = (SAVED_F77_COMMON_PTR) xmalloc (sizeof (SAVED_F77_COMMON));
 478   return (new);
 479 }
 480
 481 static COMMON_ENTRY_PTR
 482 allocate_common_entry_node (void)
 483 {
 484   COMMON_ENTRY_PTR new;
 485
 486   new = (COMMON_ENTRY_PTR) xmalloc (sizeof (COMMON_ENTRY));
 487   return (new);
 488 }
 489 #endif
 490
 491 SAVED_F77_COMMON_PTR head_common_list = NULL;   /* Ptr to 1st saved COMMON  */
 492 SAVED_F77_COMMON_PTR tail_common_list = NULL;   /* Ptr to last saved COMMON  */
 493 SAVED_F77_COMMON_PTR current_common = NULL;     /* Ptr to current COMMON */
 494
 495 #if 0
 496 static SAVED_BF_PTR saved_bf_list = NULL;       /* Ptr to (.bf,function)
 497                                                    list */
 498 static SAVED_BF_PTR saved_bf_list_end = NULL;   /* Ptr to above list's end */
 499 static SAVED_BF_PTR current_head_bf_list = NULL;        /* Current head of above list
 500                                                          */
 501
 502 static SAVED_BF_PTR tmp_bf_ptr; /* Generic temporary for use
 503                                    in macros */
 504
 505 /* The following function simply enters a given common block onto
 506    the global common block chain */
 507
 508 static void
 509 add_common_block (char *name, CORE_ADDR offset, int secnum, char *func_stab)
 510 {
 511   SAVED_F77_COMMON_PTR tmp;
 512   char *c, *local_copy_func_stab;
 513
 514   /* If the COMMON block we are trying to add has a blank
 515      name (i.e. "#BLNK_COM") then we set it to __BLANK
 516      because the darn "#" character makes GDB's input
 517      parser have fits. */
 518
 519
 520   if (strcmp (name, BLANK_COMMON_NAME_ORIGINAL) == 0
 521       || strcmp (name, BLANK_COMMON_NAME_MF77) == 0)
 522     {
 523
 524       xfree (name);
 525       name = alloca (strlen (BLANK_COMMON_NAME_LOCAL) + 1);
 526       strcpy (name, BLANK_COMMON_NAME_LOCAL);
 527     }
 528
 529   tmp = allocate_saved_f77_common_node ();
 530
 531   local_copy_func_stab = xmalloc (strlen (func_stab) + 1);
 532   strcpy (local_copy_func_stab, func_stab);
 533
 534   tmp->name = xmalloc (strlen (name) + 1);
 535
 536   /* local_copy_func_stab is a stabstring, let us first extract the
 537      function name from the stab by NULLing out the ':' character. */
 538
 539
 540   c = NULL;
 541   c = strchr (local_copy_func_stab, ':');
 542
 543   if (c)
 544     *c = '\0';
 545   else
 546     error (_("Malformed function STAB found in add_common_block()"));
 547
 548
 549   tmp->owning_function = xmalloc (strlen (local_copy_func_stab) + 1);
 550
 551   strcpy (tmp->owning_function, local_copy_func_stab);
 552
 553   strcpy (tmp->name, name);
 554   tmp->offset = offset;
 555   tmp->next = NULL;
 556   tmp->entries = NULL;
 557   tmp->secnum = secnum;
 558
 559   current_common = tmp;
 560
 561   if (head_common_list == NULL)
 562     {
 563       head_common_list = tail_common_list = tmp;
 564     }
 565   else
 566     {
 567       tail_common_list->next = tmp;
 568       tail_common_list = tmp;
 569     }
 570 }
 571 #endif
 572
 573 /* The following function simply enters a given common entry onto
 574    the "current_common" block that has been saved away. */
 575
 576 #if 0
 577 static void
 578 add_common_entry (struct symbol *entry_sym_ptr)
 579 {
 580   COMMON_ENTRY_PTR tmp;
 581
 582
 583
 584   /* The order of this list is important, since
 585      we expect the entries to appear in decl.
 586      order when we later issue "info common" calls */
 587
 588   tmp = allocate_common_entry_node ();
 589
 590   tmp->next = NULL;
 591   tmp->symbol = entry_sym_ptr;
 592
 593   if (current_common == NULL)
 594     error (_("Attempt to add COMMON entry with no block open!"));
 595   else
 596     {
 597       if (current_common->entries == NULL)
 598         {
 599           current_common->entries = tmp;
 600           current_common->end_of_entries = tmp;
 601         }
 602       else
 603         {
 604           current_common->end_of_entries->next = tmp;
 605           current_common->end_of_entries = tmp;
 606         }
 607     }
 608 }
 609 #endif
 610
 611 /* This routine finds the first encountred COMMON block named "name" */
 612
 613 #if 0
 614 static SAVED_F77_COMMON_PTR
 615 find_first_common_named (char *name)
 616 {
 617
 618   SAVED_F77_COMMON_PTR tmp;
 619
 620   tmp = head_common_list;
 621
 622   while (tmp != NULL)
 623     {
 624       if (strcmp (tmp->name, name) == 0)
 625         return (tmp);
 626       else
 627         tmp = tmp->next;
 628     }
 629   return (NULL);
 630 }
 631 #endif
 632
 633 /* This routine finds the first encountred COMMON block named "name"
 634    that belongs to function funcname */
 635
 636 SAVED_F77_COMMON_PTR
 637 find_common_for_function (char *name, char *funcname)
 638 {
 639
 640   SAVED_F77_COMMON_PTR tmp;
 641
 642   tmp = head_common_list;
 643
 644   while (tmp != NULL)
 645     {
 646       if (strcmp (tmp->name, name) == 0
 647           && strcmp (tmp->owning_function, funcname) == 0)
 648         return (tmp);
 649       else
 650         tmp = tmp->next;
 651     }
 652   return (NULL);
 653 }
 654
 655
 656 #if 0
 657
 658 /* The following function is called to patch up the offsets
 659    for the statics contained in the COMMON block named
 660    "name."  */
 661
 662 static void
 663 patch_common_entries (SAVED_F77_COMMON_PTR blk, CORE_ADDR offset, int secnum)
 664 {
 665   COMMON_ENTRY_PTR entry;
 666
 667   blk->offset = offset;         /* Keep this around for future use. */
 668
 669   entry = blk->entries;
 670
 671   while (entry != NULL)
 672     {
 673       SYMBOL_VALUE (entry->symbol) += offset;
 674       SYMBOL_SECTION (entry->symbol) = secnum;
 675
 676       entry = entry->next;
 677     }
 678   blk->secnum = secnum;
 679 }
 680
 681 /* Patch all commons named "name" that need patching.Since COMMON
 682    blocks occur with relative infrequency, we simply do a linear scan on
 683    the name.  Eventually, the best way to do this will be a
 684    hashed-lookup.  Secnum is the section number for the .bss section
 685    (which is where common data lives). */
 686
 687 static void
 688 patch_all_commons_by_name (char *name, CORE_ADDR offset, int secnum)
 689 {
 690
 691   SAVED_F77_COMMON_PTR tmp;
 692
 693   /* For blank common blocks, change the canonical reprsentation
 694      of a blank name */
 695
 696   if (strcmp (name, BLANK_COMMON_NAME_ORIGINAL) == 0
 697       || strcmp (name, BLANK_COMMON_NAME_MF77) == 0)
 698     {
 699       xfree (name);
 700       name = alloca (strlen (BLANK_COMMON_NAME_LOCAL) + 1);
 701       strcpy (name, BLANK_COMMON_NAME_LOCAL);
 702     }
 703
 704   tmp = head_common_list;
 705
 706   while (tmp != NULL)
 707     {
 708       if (COMMON_NEEDS_PATCHING (tmp))
 709         if (strcmp (tmp->name, name) == 0)
 710           patch_common_entries (tmp, offset, secnum);
 711
 712       tmp = tmp->next;
 713     }
 714 }
 715 #endif
 716
 717 /* This macro adds the symbol-number for the start of the function
 718    (the symbol number of the .bf) referenced by symnum_fcn to a
 719    list.  This list, in reality should be a FIFO queue but since
 720    #line pragmas sometimes cause line ranges to get messed up
 721    we simply create a linear list.  This list can then be searched
 722    first by a queueing algorithm and upon failure fall back to
 723    a linear scan. */
 724
 725 #if 0
 726 #define ADD_BF_SYMNUM(bf_sym,fcn_sym) \
 727   \
 728   if (saved_bf_list == NULL) \
 729 { \
 730     tmp_bf_ptr = allocate_saved_bf_node(); \
 731       \
 732         tmp_bf_ptr->symnum_bf = (bf_sym); \
 733           tmp_bf_ptr->symnum_fcn = (fcn_sym);  \
 734             tmp_bf_ptr->next = NULL; \
 735               \
 736                 current_head_bf_list = saved_bf_list = tmp_bf_ptr; \
 737                   saved_bf_list_end = tmp_bf_ptr; \
 738                   } \
 739 else \
 740 {  \
 741      tmp_bf_ptr = allocate_saved_bf_node(); \
 742        \
 743          tmp_bf_ptr->symnum_bf = (bf_sym);  \
 744            tmp_bf_ptr->symnum_fcn = (fcn_sym);  \
 745              tmp_bf_ptr->next = NULL;  \
 746                \
 747                  saved_bf_list_end->next = tmp_bf_ptr;  \
 748                    saved_bf_list_end = tmp_bf_ptr; \
 749                    }
 750 #endif
 751
 752 /* This function frees the entire (.bf,function) list */
 753
 754 #if 0
 755 static void
 756 clear_bf_list (void)
 757 {
 758
 759   SAVED_BF_PTR tmp = saved_bf_list;
 760   SAVED_BF_PTR next = NULL;
 761
 762   while (tmp != NULL)
 763     {
 764       next = tmp->next;
 765       xfree (tmp);
 766       tmp = next;
 767     }
 768   saved_bf_list = NULL;
 769 }
 770 #endif
 771
 772 int global_remote_debug;
 773
 774 #if 0
 775
 776 static long
 777 get_bf_for_fcn (long the_function)
 778 {
 779   SAVED_BF_PTR tmp;
 780   int nprobes = 0;
 781
 782   /* First use a simple queuing algorithm (i.e. look and see if the
 783      item at the head of the queue is the one you want)  */
 784
 785   if (saved_bf_list == NULL)
 786     internal_error (__FILE__, __LINE__,
 787                     _("cannot get .bf node off empty list"));
 788
 789   if (current_head_bf_list != NULL)
 790     if (current_head_bf_list->symnum_fcn == the_function)
 791       {
 792         if (global_remote_debug)
 793           fprintf_unfiltered (gdb_stderr, "*");
 794
 795         tmp = current_head_bf_list;
 796         current_head_bf_list = current_head_bf_list->next;
 797         return (tmp->symnum_bf);
 798       }
 799
 800   /* If the above did not work (probably because #line directives were
 801      used in the sourcefile and they messed up our internal tables) we now do
 802      the ugly linear scan */
 803
 804   if (global_remote_debug)
 805     fprintf_unfiltered (gdb_stderr, "\ndefaulting to linear scan\n");
 806
 807   nprobes = 0;
 808   tmp = saved_bf_list;
 809   while (tmp != NULL)
 810     {
 811       nprobes++;
 812       if (tmp->symnum_fcn == the_function)
 813         {
 814           if (global_remote_debug)
 815             fprintf_unfiltered (gdb_stderr, "Found in %d probes\n", nprobes);
 816           current_head_bf_list = tmp->next;
 817           return (tmp->symnum_bf);
 818         }
 819       tmp = tmp->next;
 820     }
 821
 822   return (-1);
 823 }
 824
 825 static SAVED_FUNCTION_PTR saved_function_list = NULL;
 826 static SAVED_FUNCTION_PTR saved_function_list_end = NULL;
 827
 828 static void
 829 clear_function_list (void)
 830 {
 831   SAVED_FUNCTION_PTR tmp = saved_function_list;
 832   SAVED_FUNCTION_PTR next = NULL;
 833
 834   while (tmp != NULL)
 835     {
 836       next = tmp->next;
 837       xfree (tmp);
 838       tmp = next;
 839     }
 840
 841   saved_function_list = NULL;
 842 }
 843 #endif