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
 303 /* This is declared in c-lang.h but it is silly to import that file for what
 304    is already just a hack. */
 305 extern int c_value_print (struct value *, struct ui_file *, int,
 306                           enum val_prettyprint);
 307
 308 const struct language_defn f_language_defn =
 309 {
 310   "fortran",
 311   language_fortran,
 312   range_check_on,
 313   type_check_on,
 314   case_sensitive_off,
 315   array_column_major,
 316   &exp_descriptor_standard,
 317   f_parse,                      /* parser */
 318   f_error,                      /* parser error function */
 319   null_post_parser,
 320   f_printchar,                  /* Print character constant */
 321   f_printstr,                   /* function to print string constant */
 322   f_emit_char,                  /* Function to print a single character */
 323   f_print_type,                 /* Print a type using appropriate syntax */
 324   f_val_print,                  /* Print a value using appropriate syntax */
 325   c_value_print,                /* FIXME */
 326   NULL,                         /* Language specific skip_trampoline */
 327   NULL,                         /* name_of_this */
 328   basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
 329   basic_lookup_transparent_type,/* lookup_transparent_type */
 330   NULL,                         /* Language specific symbol demangler */
 331   NULL,                         /* Language specific class_name_from_physname */
 332   f_op_print_tab,               /* expression operators for printing */
 333   0,                            /* arrays are first-class (not c-style) */
 334   1,                            /* String lower bound */
 335   default_word_break_characters,
 336   default_make_symbol_completion_list,
 337   f_language_arch_info,
 338   default_print_array_index,
 339   default_pass_by_reference,
 340   LANG_MAGIC
 341 };
 342
 343 static void *
 344 build_fortran_types (struct gdbarch *gdbarch)
 345 {
 346   struct builtin_f_type *builtin_f_type
 347     = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct builtin_f_type);
 348
 349   builtin_f_type->builtin_void =
 350     init_type (TYPE_CODE_VOID, 1,
 351                0,
 352                "VOID", (struct objfile *) NULL);
 353
 354   builtin_f_type->builtin_character =
 355     init_type (TYPE_CODE_INT, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 356                0,
 357                "character", (struct objfile *) NULL);
 358
 359   builtin_f_type->builtin_logical_s1 =
 360     init_type (TYPE_CODE_BOOL, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 361                TYPE_FLAG_UNSIGNED,
 362                "logical*1", (struct objfile *) NULL);
 363
 364   builtin_f_type->builtin_integer_s2 =
 365     init_type (TYPE_CODE_INT,
 366                gdbarch_short_bit (gdbarch) / TARGET_CHAR_BIT,
 367                0, "integer*2", (struct objfile *) NULL);
 368
 369   builtin_f_type->builtin_logical_s2 =
 370     init_type (TYPE_CODE_BOOL,
 371                gdbarch_short_bit (gdbarch) / TARGET_CHAR_BIT,
 372                TYPE_FLAG_UNSIGNED, "logical*2", (struct objfile *) NULL);
 373
 374   builtin_f_type->builtin_integer =
 375     init_type (TYPE_CODE_INT,
 376                gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT,
 377                0, "integer", (struct objfile *) NULL);
 378
 379   builtin_f_type->builtin_logical =
 380     init_type (TYPE_CODE_BOOL,
 381                gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT,
 382                TYPE_FLAG_UNSIGNED, "logical*4", (struct objfile *) NULL);
 383
 384   builtin_f_type->builtin_real =
 385     init_type (TYPE_CODE_FLT,
 386                gdbarch_float_bit (gdbarch) / TARGET_CHAR_BIT,
 387                0,
 388                "real", (struct objfile *) NULL);
 389
 390   builtin_f_type->builtin_real_s8 =
 391     init_type (TYPE_CODE_FLT,
 392                gdbarch_double_bit (gdbarch) / TARGET_CHAR_BIT,
 393                0,
 394                "real*8", (struct objfile *) NULL);
 395
 396   builtin_f_type->builtin_real_s16 =
 397     init_type (TYPE_CODE_FLT,
 398                gdbarch_long_double_bit (gdbarch) / TARGET_CHAR_BIT,
 399                0,
 400                "real*16", (struct objfile *) NULL);
 401
 402   builtin_f_type->builtin_complex_s8 =
 403     init_type (TYPE_CODE_COMPLEX,
 404                2 * gdbarch_float_bit (gdbarch) / TARGET_CHAR_BIT,
 405                0,
 406                "complex*8", (struct objfile *) NULL);
 407   TYPE_TARGET_TYPE (builtin_f_type->builtin_complex_s8)
 408     = builtin_f_type->builtin_real;
 409
 410   builtin_f_type->builtin_complex_s16 =
 411     init_type (TYPE_CODE_COMPLEX,
 412                2 * gdbarch_double_bit (gdbarch) / TARGET_CHAR_BIT,
 413                0,
 414                "complex*16", (struct objfile *) NULL);
 415   TYPE_TARGET_TYPE (builtin_f_type->builtin_complex_s16)
 416     = builtin_f_type->builtin_real_s8;
 417
 418   /* We have a new size == 4 double floats for the
 419      complex*32 data type */
 420
 421   builtin_f_type->builtin_complex_s32 =
 422     init_type (TYPE_CODE_COMPLEX,
 423                2 * gdbarch_long_double_bit (gdbarch) / TARGET_CHAR_BIT,
 424                0,
 425                "complex*32", (struct objfile *) NULL);
 426   TYPE_TARGET_TYPE (builtin_f_type->builtin_complex_s32)
 427     = builtin_f_type->builtin_real_s16;
 428
 429   return builtin_f_type;
 430 }
 431
 432 static struct gdbarch_data *f_type_data;
 433
 434 const struct builtin_f_type *
 435 builtin_f_type (struct gdbarch *gdbarch)
 436 {
 437   return gdbarch_data (gdbarch, f_type_data);
 438 }
 439
 440 void
 441 _initialize_f_language (void)
 442 {
 443   f_type_data = gdbarch_data_register_post_init (build_fortran_types);
 444
 445   add_language (&f_language_defn);
 446 }
 447
 448 #if 0
 449 static SAVED_BF_PTR
 450 allocate_saved_bf_node (void)
 451 {
 452   SAVED_BF_PTR new;
 453
 454   new = (SAVED_BF_PTR) xmalloc (sizeof (SAVED_BF));
 455   return (new);
 456 }
 457
 458 static SAVED_FUNCTION *
 459 allocate_saved_function_node (void)
 460 {
 461   SAVED_FUNCTION *new;
 462
 463   new = (SAVED_FUNCTION *) xmalloc (sizeof (SAVED_FUNCTION));
 464   return (new);
 465 }
 466
 467 static SAVED_F77_COMMON_PTR
 468 allocate_saved_f77_common_node (void)
 469 {
 470   SAVED_F77_COMMON_PTR new;
 471
 472   new = (SAVED_F77_COMMON_PTR) xmalloc (sizeof (SAVED_F77_COMMON));
 473   return (new);
 474 }
 475
 476 static COMMON_ENTRY_PTR
 477 allocate_common_entry_node (void)
 478 {
 479   COMMON_ENTRY_PTR new;
 480
 481   new = (COMMON_ENTRY_PTR) xmalloc (sizeof (COMMON_ENTRY));
 482   return (new);
 483 }
 484 #endif
 485
 486 SAVED_F77_COMMON_PTR head_common_list = NULL;   /* Ptr to 1st saved COMMON  */
 487 SAVED_F77_COMMON_PTR tail_common_list = NULL;   /* Ptr to last saved COMMON  */
 488 SAVED_F77_COMMON_PTR current_common = NULL;     /* Ptr to current COMMON */
 489
 490 #if 0
 491 static SAVED_BF_PTR saved_bf_list = NULL;       /* Ptr to (.bf,function)
 492                                                    list */
 493 static SAVED_BF_PTR saved_bf_list_end = NULL;   /* Ptr to above list's end */
 494 static SAVED_BF_PTR current_head_bf_list = NULL;        /* Current head of above list
 495                                                          */
 496
 497 static SAVED_BF_PTR tmp_bf_ptr; /* Generic temporary for use
 498                                    in macros */
 499
 500 /* The following function simply enters a given common block onto
 501    the global common block chain */
 502
 503 static void
 504 add_common_block (char *name, CORE_ADDR offset, int secnum, char *func_stab)
 505 {
 506   SAVED_F77_COMMON_PTR tmp;
 507   char *c, *local_copy_func_stab;
 508
 509   /* If the COMMON block we are trying to add has a blank
 510      name (i.e. "#BLNK_COM") then we set it to __BLANK
 511      because the darn "#" character makes GDB's input
 512      parser have fits. */
 513
 514
 515   if (strcmp (name, BLANK_COMMON_NAME_ORIGINAL) == 0
 516       || strcmp (name, BLANK_COMMON_NAME_MF77) == 0)
 517     {
 518
 519       xfree (name);
 520       name = alloca (strlen (BLANK_COMMON_NAME_LOCAL) + 1);
 521       strcpy (name, BLANK_COMMON_NAME_LOCAL);
 522     }
 523
 524   tmp = allocate_saved_f77_common_node ();
 525
 526   local_copy_func_stab = xmalloc (strlen (func_stab) + 1);
 527   strcpy (local_copy_func_stab, func_stab);
 528
 529   tmp->name = xmalloc (strlen (name) + 1);
 530
 531   /* local_copy_func_stab is a stabstring, let us first extract the
 532      function name from the stab by NULLing out the ':' character. */
 533
 534
 535   c = NULL;
 536   c = strchr (local_copy_func_stab, ':');
 537
 538   if (c)
 539     *c = '\0';
 540   else
 541     error (_("Malformed function STAB found in add_common_block()"));
 542
 543
 544   tmp->owning_function = xmalloc (strlen (local_copy_func_stab) + 1);
 545
 546   strcpy (tmp->owning_function, local_copy_func_stab);
 547
 548   strcpy (tmp->name, name);
 549   tmp->offset = offset;
 550   tmp->next = NULL;
 551   tmp->entries = NULL;
 552   tmp->secnum = secnum;
 553
 554   current_common = tmp;
 555
 556   if (head_common_list == NULL)
 557     {
 558       head_common_list = tail_common_list = tmp;
 559     }
 560   else
 561     {
 562       tail_common_list->next = tmp;
 563       tail_common_list = tmp;
 564     }
 565 }
 566 #endif
 567
 568 /* The following function simply enters a given common entry onto
 569    the "current_common" block that has been saved away. */
 570
 571 #if 0
 572 static void
 573 add_common_entry (struct symbol *entry_sym_ptr)
 574 {
 575   COMMON_ENTRY_PTR tmp;
 576
 577
 578
 579   /* The order of this list is important, since
 580      we expect the entries to appear in decl.
 581      order when we later issue "info common" calls */
 582
 583   tmp = allocate_common_entry_node ();
 584
 585   tmp->next = NULL;
 586   tmp->symbol = entry_sym_ptr;
 587
 588   if (current_common == NULL)
 589     error (_("Attempt to add COMMON entry with no block open!"));
 590   else
 591     {
 592       if (current_common->entries == NULL)
 593         {
 594           current_common->entries = tmp;
 595           current_common->end_of_entries = tmp;
 596         }
 597       else
 598         {
 599           current_common->end_of_entries->next = tmp;
 600           current_common->end_of_entries = tmp;
 601         }
 602     }
 603 }
 604 #endif
 605
 606 /* This routine finds the first encountred COMMON block named "name" */
 607
 608 #if 0
 609 static SAVED_F77_COMMON_PTR
 610 find_first_common_named (char *name)
 611 {
 612
 613   SAVED_F77_COMMON_PTR tmp;
 614
 615   tmp = head_common_list;
 616
 617   while (tmp != NULL)
 618     {
 619       if (strcmp (tmp->name, name) == 0)
 620         return (tmp);
 621       else
 622         tmp = tmp->next;
 623     }
 624   return (NULL);
 625 }
 626 #endif
 627
 628 /* This routine finds the first encountred COMMON block named "name"
 629    that belongs to function funcname */
 630
 631 SAVED_F77_COMMON_PTR
 632 find_common_for_function (char *name, char *funcname)
 633 {
 634
 635   SAVED_F77_COMMON_PTR tmp;
 636
 637   tmp = head_common_list;
 638
 639   while (tmp != NULL)
 640     {
 641       if (strcmp (tmp->name, name) == 0
 642           && strcmp (tmp->owning_function, funcname) == 0)
 643         return (tmp);
 644       else
 645         tmp = tmp->next;
 646     }
 647   return (NULL);
 648 }
 649
 650
 651 #if 0
 652
 653 /* The following function is called to patch up the offsets
 654    for the statics contained in the COMMON block named
 655    "name."  */
 656
 657 static void
 658 patch_common_entries (SAVED_F77_COMMON_PTR blk, CORE_ADDR offset, int secnum)
 659 {
 660   COMMON_ENTRY_PTR entry;
 661
 662   blk->offset = offset;         /* Keep this around for future use. */
 663
 664   entry = blk->entries;
 665
 666   while (entry != NULL)
 667     {
 668       SYMBOL_VALUE (entry->symbol) += offset;
 669       SYMBOL_SECTION (entry->symbol) = secnum;
 670
 671       entry = entry->next;
 672     }
 673   blk->secnum = secnum;
 674 }
 675
 676 /* Patch all commons named "name" that need patching.Since COMMON
 677    blocks occur with relative infrequency, we simply do a linear scan on
 678    the name.  Eventually, the best way to do this will be a
 679    hashed-lookup.  Secnum is the section number for the .bss section
 680    (which is where common data lives). */
 681
 682 static void
 683 patch_all_commons_by_name (char *name, CORE_ADDR offset, int secnum)
 684 {
 685
 686   SAVED_F77_COMMON_PTR tmp;
 687
 688   /* For blank common blocks, change the canonical reprsentation
 689      of a blank name */
 690
 691   if (strcmp (name, BLANK_COMMON_NAME_ORIGINAL) == 0
 692       || strcmp (name, BLANK_COMMON_NAME_MF77) == 0)
 693     {
 694       xfree (name);
 695       name = alloca (strlen (BLANK_COMMON_NAME_LOCAL) + 1);
 696       strcpy (name, BLANK_COMMON_NAME_LOCAL);
 697     }
 698
 699   tmp = head_common_list;
 700
 701   while (tmp != NULL)
 702     {
 703       if (COMMON_NEEDS_PATCHING (tmp))
 704         if (strcmp (tmp->name, name) == 0)
 705           patch_common_entries (tmp, offset, secnum);
 706
 707       tmp = tmp->next;
 708     }
 709 }
 710 #endif
 711
 712 /* This macro adds the symbol-number for the start of the function
 713    (the symbol number of the .bf) referenced by symnum_fcn to a
 714    list.  This list, in reality should be a FIFO queue but since
 715    #line pragmas sometimes cause line ranges to get messed up
 716    we simply create a linear list.  This list can then be searched
 717    first by a queueing algorithm and upon failure fall back to
 718    a linear scan. */
 719
 720 #if 0
 721 #define ADD_BF_SYMNUM(bf_sym,fcn_sym) \
 722   \
 723   if (saved_bf_list == NULL) \
 724 { \
 725     tmp_bf_ptr = allocate_saved_bf_node(); \
 726       \
 727         tmp_bf_ptr->symnum_bf = (bf_sym); \
 728           tmp_bf_ptr->symnum_fcn = (fcn_sym);  \
 729             tmp_bf_ptr->next = NULL; \
 730               \
 731                 current_head_bf_list = saved_bf_list = tmp_bf_ptr; \
 732                   saved_bf_list_end = tmp_bf_ptr; \
 733                   } \
 734 else \
 735 {  \
 736      tmp_bf_ptr = allocate_saved_bf_node(); \
 737        \
 738          tmp_bf_ptr->symnum_bf = (bf_sym);  \
 739            tmp_bf_ptr->symnum_fcn = (fcn_sym);  \
 740              tmp_bf_ptr->next = NULL;  \
 741                \
 742                  saved_bf_list_end->next = tmp_bf_ptr;  \
 743                    saved_bf_list_end = tmp_bf_ptr; \
 744                    }
 745 #endif
 746
 747 /* This function frees the entire (.bf,function) list */
 748
 749 #if 0
 750 static void
 751 clear_bf_list (void)
 752 {
 753
 754   SAVED_BF_PTR tmp = saved_bf_list;
 755   SAVED_BF_PTR next = NULL;
 756
 757   while (tmp != NULL)
 758     {
 759       next = tmp->next;
 760       xfree (tmp);
 761       tmp = next;
 762     }
 763   saved_bf_list = NULL;
 764 }
 765 #endif
 766
 767 int global_remote_debug;
 768
 769 #if 0
 770
 771 static long
 772 get_bf_for_fcn (long the_function)
 773 {
 774   SAVED_BF_PTR tmp;
 775   int nprobes = 0;
 776
 777   /* First use a simple queuing algorithm (i.e. look and see if the
 778      item at the head of the queue is the one you want)  */
 779
 780   if (saved_bf_list == NULL)
 781     internal_error (__FILE__, __LINE__,
 782                     _("cannot get .bf node off empty list"));
 783
 784   if (current_head_bf_list != NULL)
 785     if (current_head_bf_list->symnum_fcn == the_function)
 786       {
 787         if (global_remote_debug)
 788           fprintf_unfiltered (gdb_stderr, "*");
 789
 790         tmp = current_head_bf_list;
 791         current_head_bf_list = current_head_bf_list->next;
 792         return (tmp->symnum_bf);
 793       }
 794
 795   /* If the above did not work (probably because #line directives were
 796      used in the sourcefile and they messed up our internal tables) we now do
 797      the ugly linear scan */
 798
 799   if (global_remote_debug)
 800     fprintf_unfiltered (gdb_stderr, "\ndefaulting to linear scan\n");
 801
 802   nprobes = 0;
 803   tmp = saved_bf_list;
 804   while (tmp != NULL)
 805     {
 806       nprobes++;
 807       if (tmp->symnum_fcn == the_function)
 808         {
 809           if (global_remote_debug)
 810             fprintf_unfiltered (gdb_stderr, "Found in %d probes\n", nprobes);
 811           current_head_bf_list = tmp->next;
 812           return (tmp->symnum_bf);
 813         }
 814       tmp = tmp->next;
 815     }
 816
 817   return (-1);
 818 }
 819
 820 static SAVED_FUNCTION_PTR saved_function_list = NULL;
 821 static SAVED_FUNCTION_PTR saved_function_list_end = NULL;
 822
 823 static void
 824 clear_function_list (void)
 825 {
 826   SAVED_FUNCTION_PTR tmp = saved_function_list;
 827   SAVED_FUNCTION_PTR next = NULL;
 828
 829   while (tmp != NULL)
 830     {
 831       next = tmp->next;
 832       xfree (tmp);
 833       tmp = next;
 834     }
 835
 836   saved_function_list = NULL;
 837 }
 838 #endif