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 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             const struct value_print_options *options)
 147 {
 148   unsigned int i;
 149   unsigned int things_printed = 0;
 150   int in_quotes = 0;
 151   int need_comma = 0;
 152
 153   if (length == 0)
 154     {
 155       fputs_filtered ("''", gdb_stdout);
 156       return;
 157     }
 158
 159   for (i = 0; i < length && things_printed < options->print_max; ++i)
 160     {
 161       /* Position of the character we are examining
 162          to see whether it is repeated.  */
 163       unsigned int rep1;
 164       /* Number of repetitions we have detected so far.  */
 165       unsigned int reps;
 166
 167       QUIT;
 168
 169       if (need_comma)
 170         {
 171           fputs_filtered (", ", stream);
 172           need_comma = 0;
 173         }
 174
 175       rep1 = i + 1;
 176       reps = 1;
 177       while (rep1 < length && string[rep1] == string[i])
 178         {
 179           ++rep1;
 180           ++reps;
 181         }
 182
 183       if (reps > options->repeat_count_threshold)
 184         {
 185           if (in_quotes)
 186             {
 187               if (options->inspect_it)
 188                 fputs_filtered ("\\', ", stream);
 189               else
 190                 fputs_filtered ("', ", stream);
 191               in_quotes = 0;
 192             }
 193           f_printchar (string[i], stream);
 194           fprintf_filtered (stream, " <repeats %u times>", reps);
 195           i = rep1 - 1;
 196           things_printed += options->repeat_count_threshold;
 197           need_comma = 1;
 198         }
 199       else
 200         {
 201           if (!in_quotes)
 202             {
 203               if (options->inspect_it)
 204                 fputs_filtered ("\\'", stream);
 205               else
 206                 fputs_filtered ("'", stream);
 207               in_quotes = 1;
 208             }
 209           LA_EMIT_CHAR (string[i], stream, '"');
 210           ++things_printed;
 211         }
 212     }
 213
 214   /* Terminate the quotes if necessary.  */
 215   if (in_quotes)
 216     {
 217       if (options->inspect_it)
 218         fputs_filtered ("\\'", stream);
 219       else
 220         fputs_filtered ("'", stream);
 221     }
 222
 223   if (force_ellipses || i < length)
 224     fputs_filtered ("...", stream);
 225 }
 226 \f
 227
 228 /* Table of operators and their precedences for printing expressions.  */
 229
 230 static const struct op_print f_op_print_tab[] =
 231 {
 232   {"+", BINOP_ADD, PREC_ADD, 0},
 233   {"+", UNOP_PLUS, PREC_PREFIX, 0},
 234   {"-", BINOP_SUB, PREC_ADD, 0},
 235   {"-", UNOP_NEG, PREC_PREFIX, 0},
 236   {"*", BINOP_MUL, PREC_MUL, 0},
 237   {"/", BINOP_DIV, PREC_MUL, 0},
 238   {"DIV", BINOP_INTDIV, PREC_MUL, 0},
 239   {"MOD", BINOP_REM, PREC_MUL, 0},
 240   {"=", BINOP_ASSIGN, PREC_ASSIGN, 1},
 241   {".OR.", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
 242   {".AND.", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
 243   {".NOT.", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
 244   {".EQ.", BINOP_EQUAL, PREC_EQUAL, 0},
 245   {".NE.", BINOP_NOTEQUAL, PREC_EQUAL, 0},
 246   {".LE.", BINOP_LEQ, PREC_ORDER, 0},
 247   {".GE.", BINOP_GEQ, PREC_ORDER, 0},
 248   {".GT.", BINOP_GTR, PREC_ORDER, 0},
 249   {".LT.", BINOP_LESS, PREC_ORDER, 0},
 250   {"**", UNOP_IND, PREC_PREFIX, 0},
 251   {"@", BINOP_REPEAT, PREC_REPEAT, 0},
 252   {NULL, 0, 0, 0}
 253 };
 254 \f
 255 enum f_primitive_types {
 256   f_primitive_type_character,
 257   f_primitive_type_logical,
 258   f_primitive_type_logical_s1,
 259   f_primitive_type_logical_s2,
 260   f_primitive_type_integer,
 261   f_primitive_type_integer_s2,
 262   f_primitive_type_real,
 263   f_primitive_type_real_s8,
 264   f_primitive_type_real_s16,
 265   f_primitive_type_complex_s8,
 266   f_primitive_type_complex_s16,
 267   f_primitive_type_void,
 268   nr_f_primitive_types
 269 };
 270
 271 static void
 272 f_language_arch_info (struct gdbarch *gdbarch,
 273                       struct language_arch_info *lai)
 274 {
 275   const struct builtin_f_type *builtin = builtin_f_type (gdbarch);
 276
 277   lai->string_char_type = builtin->builtin_character;
 278   lai->primitive_type_vector
 279     = GDBARCH_OBSTACK_CALLOC (gdbarch, nr_f_primitive_types + 1,
 280                               struct type *);
 281
 282   lai->primitive_type_vector [f_primitive_type_character]
 283     = builtin->builtin_character;
 284   lai->primitive_type_vector [f_primitive_type_logical]
 285     = builtin->builtin_logical;
 286   lai->primitive_type_vector [f_primitive_type_logical_s1]
 287     = builtin->builtin_logical_s1;
 288   lai->primitive_type_vector [f_primitive_type_logical_s2]
 289     = builtin->builtin_logical_s2;
 290   lai->primitive_type_vector [f_primitive_type_real]
 291     = builtin->builtin_real;
 292   lai->primitive_type_vector [f_primitive_type_real_s8]
 293     = builtin->builtin_real_s8;
 294   lai->primitive_type_vector [f_primitive_type_real_s16]
 295     = builtin->builtin_real_s16;
 296   lai->primitive_type_vector [f_primitive_type_complex_s8]
 297     = builtin->builtin_complex_s8;
 298   lai->primitive_type_vector [f_primitive_type_complex_s16]
 299     = builtin->builtin_complex_s16;
 300   lai->primitive_type_vector [f_primitive_type_void]
 301     = builtin->builtin_void;
 302
 303   lai->bool_type_symbol = "logical";
 304   lai->bool_type_default = builtin->builtin_logical_s2;
 305 }
 306
 307 /* This is declared in c-lang.h but it is silly to import that file for what
 308    is already just a hack. */
 309 extern int c_value_print (struct value *, struct ui_file *,
 310                           const struct value_print_options *);
 311
 312 const struct language_defn f_language_defn =
 313 {
 314   "fortran",
 315   language_fortran,
 316   range_check_on,
 317   type_check_on,
 318   case_sensitive_off,
 319   array_column_major,
 320   macro_expansion_no,
 321   &exp_descriptor_standard,
 322   f_parse,                      /* parser */
 323   f_error,                      /* parser error function */
 324   null_post_parser,
 325   f_printchar,                  /* Print character constant */
 326   f_printstr,                   /* function to print string constant */
 327   f_emit_char,                  /* Function to print a single character */
 328   f_print_type,                 /* Print a type using appropriate syntax */
 329   default_print_typedef,        /* Print a typedef using appropriate syntax */
 330   f_val_print,                  /* Print a value using appropriate syntax */
 331   c_value_print,                /* FIXME */
 332   NULL,                         /* Language specific skip_trampoline */
 333   NULL,                         /* name_of_this */
 334   basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
 335   basic_lookup_transparent_type,/* lookup_transparent_type */
 336   NULL,                         /* Language specific symbol demangler */
 337   NULL,                         /* Language specific class_name_from_physname */
 338   f_op_print_tab,               /* expression operators for printing */
 339   0,                            /* arrays are first-class (not c-style) */
 340   1,                            /* String lower bound */
 341   default_word_break_characters,
 342   default_make_symbol_completion_list,
 343   f_language_arch_info,
 344   default_print_array_index,
 345   default_pass_by_reference,
 346   LANG_MAGIC
 347 };
 348
 349 static void *
 350 build_fortran_types (struct gdbarch *gdbarch)
 351 {
 352   struct builtin_f_type *builtin_f_type
 353     = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct builtin_f_type);
 354
 355   builtin_f_type->builtin_void =
 356     init_type (TYPE_CODE_VOID, 1,
 357                0,
 358                "VOID", (struct objfile *) NULL);
 359
 360   builtin_f_type->builtin_character =
 361     init_type (TYPE_CODE_INT, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 362                0,
 363                "character", (struct objfile *) NULL);
 364
 365   builtin_f_type->builtin_logical_s1 =
 366     init_type (TYPE_CODE_BOOL, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 367                TYPE_FLAG_UNSIGNED,
 368                "logical*1", (struct objfile *) NULL);
 369
 370   builtin_f_type->builtin_integer_s2 =
 371     init_type (TYPE_CODE_INT,
 372                gdbarch_short_bit (gdbarch) / TARGET_CHAR_BIT,
 373                0, "integer*2", (struct objfile *) NULL);
 374
 375   builtin_f_type->builtin_logical_s2 =
 376     init_type (TYPE_CODE_BOOL,
 377                gdbarch_short_bit (gdbarch) / TARGET_CHAR_BIT,
 378                TYPE_FLAG_UNSIGNED, "logical*2", (struct objfile *) NULL);
 379
 380   builtin_f_type->builtin_integer =
 381     init_type (TYPE_CODE_INT,
 382                gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT,
 383                0, "integer", (struct objfile *) NULL);
 384
 385   builtin_f_type->builtin_logical =
 386     init_type (TYPE_CODE_BOOL,
 387                gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT,
 388                TYPE_FLAG_UNSIGNED, "logical*4", (struct objfile *) NULL);
 389
 390   builtin_f_type->builtin_real =
 391     init_type (TYPE_CODE_FLT,
 392                gdbarch_float_bit (gdbarch) / TARGET_CHAR_BIT,
 393                0,
 394                "real", (struct objfile *) NULL);
 395
 396   builtin_f_type->builtin_real_s8 =
 397     init_type (TYPE_CODE_FLT,
 398                gdbarch_double_bit (gdbarch) / TARGET_CHAR_BIT,
 399                0,
 400                "real*8", (struct objfile *) NULL);
 401
 402   builtin_f_type->builtin_real_s16 =
 403     init_type (TYPE_CODE_FLT,
 404                gdbarch_long_double_bit (gdbarch) / TARGET_CHAR_BIT,
 405                0,
 406                "real*16", (struct objfile *) NULL);
 407
 408   builtin_f_type->builtin_complex_s8 =
 409     init_type (TYPE_CODE_COMPLEX,
 410                2 * gdbarch_float_bit (gdbarch) / TARGET_CHAR_BIT,
 411                0,
 412                "complex*8", (struct objfile *) NULL);
 413   TYPE_TARGET_TYPE (builtin_f_type->builtin_complex_s8)
 414     = builtin_f_type->builtin_real;
 415
 416   builtin_f_type->builtin_complex_s16 =
 417     init_type (TYPE_CODE_COMPLEX,
 418                2 * gdbarch_double_bit (gdbarch) / TARGET_CHAR_BIT,
 419                0,
 420                "complex*16", (struct objfile *) NULL);
 421   TYPE_TARGET_TYPE (builtin_f_type->builtin_complex_s16)
 422     = builtin_f_type->builtin_real_s8;
 423
 424   /* We have a new size == 4 double floats for the
 425      complex*32 data type */
 426
 427   builtin_f_type->builtin_complex_s32 =
 428     init_type (TYPE_CODE_COMPLEX,
 429                2 * gdbarch_long_double_bit (gdbarch) / TARGET_CHAR_BIT,
 430                0,
 431                "complex*32", (struct objfile *) NULL);
 432   TYPE_TARGET_TYPE (builtin_f_type->builtin_complex_s32)
 433     = builtin_f_type->builtin_real_s16;
 434
 435   return builtin_f_type;
 436 }
 437
 438 static struct gdbarch_data *f_type_data;
 439
 440 const struct builtin_f_type *
 441 builtin_f_type (struct gdbarch *gdbarch)
 442 {
 443   return gdbarch_data (gdbarch, f_type_data);
 444 }
 445
 446 void
 447 _initialize_f_language (void)
 448 {
 449   f_type_data = gdbarch_data_register_post_init (build_fortran_types);
 450
 451   add_language (&f_language_defn);
 452 }
 453
 454 #if 0
 455 static SAVED_BF_PTR
 456 allocate_saved_bf_node (void)
 457 {
 458   SAVED_BF_PTR new;
 459
 460   new = (SAVED_BF_PTR) xmalloc (sizeof (SAVED_BF));
 461   return (new);
 462 }
 463
 464 static SAVED_FUNCTION *
 465 allocate_saved_function_node (void)
 466 {
 467   SAVED_FUNCTION *new;
 468
 469   new = (SAVED_FUNCTION *) xmalloc (sizeof (SAVED_FUNCTION));
 470   return (new);
 471 }
 472
 473 static SAVED_F77_COMMON_PTR
 474 allocate_saved_f77_common_node (void)
 475 {
 476   SAVED_F77_COMMON_PTR new;
 477
 478   new = (SAVED_F77_COMMON_PTR) xmalloc (sizeof (SAVED_F77_COMMON));
 479   return (new);
 480 }
 481
 482 static COMMON_ENTRY_PTR
 483 allocate_common_entry_node (void)
 484 {
 485   COMMON_ENTRY_PTR new;
 486
 487   new = (COMMON_ENTRY_PTR) xmalloc (sizeof (COMMON_ENTRY));
 488   return (new);
 489 }
 490 #endif
 491
 492 SAVED_F77_COMMON_PTR head_common_list = NULL;   /* Ptr to 1st saved COMMON  */
 493 SAVED_F77_COMMON_PTR tail_common_list = NULL;   /* Ptr to last saved COMMON  */
 494 SAVED_F77_COMMON_PTR current_common = NULL;     /* Ptr to current COMMON */
 495
 496 #if 0
 497 static SAVED_BF_PTR saved_bf_list = NULL;       /* Ptr to (.bf,function)
 498                                                    list */
 499 static SAVED_BF_PTR saved_bf_list_end = NULL;   /* Ptr to above list's end */
 500 static SAVED_BF_PTR current_head_bf_list = NULL;        /* Current head of above list
 501                                                          */
 502
 503 static SAVED_BF_PTR tmp_bf_ptr; /* Generic temporary for use
 504                                    in macros */
 505
 506 /* The following function simply enters a given common block onto
 507    the global common block chain */
 508
 509 static void
 510 add_common_block (char *name, CORE_ADDR offset, int secnum, char *func_stab)
 511 {
 512   SAVED_F77_COMMON_PTR tmp;
 513   char *c, *local_copy_func_stab;
 514
 515   /* If the COMMON block we are trying to add has a blank
 516      name (i.e. "#BLNK_COM") then we set it to __BLANK
 517      because the darn "#" character makes GDB's input
 518      parser have fits. */
 519
 520
 521   if (strcmp (name, BLANK_COMMON_NAME_ORIGINAL) == 0
 522       || strcmp (name, BLANK_COMMON_NAME_MF77) == 0)
 523     {
 524
 525       xfree (name);
 526       name = alloca (strlen (BLANK_COMMON_NAME_LOCAL) + 1);
 527       strcpy (name, BLANK_COMMON_NAME_LOCAL);
 528     }
 529
 530   tmp = allocate_saved_f77_common_node ();
 531
 532   local_copy_func_stab = xmalloc (strlen (func_stab) + 1);
 533   strcpy (local_copy_func_stab, func_stab);
 534
 535   tmp->name = xmalloc (strlen (name) + 1);
 536
 537   /* local_copy_func_stab is a stabstring, let us first extract the
 538      function name from the stab by NULLing out the ':' character. */
 539
 540
 541   c = NULL;
 542   c = strchr (local_copy_func_stab, ':');
 543
 544   if (c)
 545     *c = '\0';
 546   else
 547     error (_("Malformed function STAB found in add_common_block()"));
 548
 549
 550   tmp->owning_function = xmalloc (strlen (local_copy_func_stab) + 1);
 551
 552   strcpy (tmp->owning_function, local_copy_func_stab);
 553
 554   strcpy (tmp->name, name);
 555   tmp->offset = offset;
 556   tmp->next = NULL;
 557   tmp->entries = NULL;
 558   tmp->secnum = secnum;
 559
 560   current_common = tmp;
 561
 562   if (head_common_list == NULL)
 563     {
 564       head_common_list = tail_common_list = tmp;
 565     }
 566   else
 567     {
 568       tail_common_list->next = tmp;
 569       tail_common_list = tmp;
 570     }
 571 }
 572 #endif
 573
 574 /* The following function simply enters a given common entry onto
 575    the "current_common" block that has been saved away. */
 576
 577 #if 0
 578 static void
 579 add_common_entry (struct symbol *entry_sym_ptr)
 580 {
 581   COMMON_ENTRY_PTR tmp;
 582
 583
 584
 585   /* The order of this list is important, since
 586      we expect the entries to appear in decl.
 587      order when we later issue "info common" calls */
 588
 589   tmp = allocate_common_entry_node ();
 590
 591   tmp->next = NULL;
 592   tmp->symbol = entry_sym_ptr;
 593
 594   if (current_common == NULL)
 595     error (_("Attempt to add COMMON entry with no block open!"));
 596   else
 597     {
 598       if (current_common->entries == NULL)
 599         {
 600           current_common->entries = tmp;
 601           current_common->end_of_entries = tmp;
 602         }
 603       else
 604         {
 605           current_common->end_of_entries->next = tmp;
 606           current_common->end_of_entries = tmp;
 607         }
 608     }
 609 }
 610 #endif
 611
 612 /* This routine finds the first encountred COMMON block named "name" */
 613
 614 #if 0
 615 static SAVED_F77_COMMON_PTR
 616 find_first_common_named (char *name)
 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         return (tmp);
 627       else
 628         tmp = tmp->next;
 629     }
 630   return (NULL);
 631 }
 632 #endif
 633
 634 /* This routine finds the first encountred COMMON block named "name"
 635    that belongs to function funcname */
 636
 637 SAVED_F77_COMMON_PTR
 638 find_common_for_function (char *name, char *funcname)
 639 {
 640
 641   SAVED_F77_COMMON_PTR tmp;
 642
 643   tmp = head_common_list;
 644
 645   while (tmp != NULL)
 646     {
 647       if (strcmp (tmp->name, name) == 0
 648           && strcmp (tmp->owning_function, funcname) == 0)
 649         return (tmp);
 650       else
 651         tmp = tmp->next;
 652     }
 653   return (NULL);
 654 }
 655
 656
 657 #if 0
 658
 659 /* The following function is called to patch up the offsets
 660    for the statics contained in the COMMON block named
 661    "name."  */
 662
 663 static void
 664 patch_common_entries (SAVED_F77_COMMON_PTR blk, CORE_ADDR offset, int secnum)
 665 {
 666   COMMON_ENTRY_PTR entry;
 667
 668   blk->offset = offset;         /* Keep this around for future use. */
 669
 670   entry = blk->entries;
 671
 672   while (entry != NULL)
 673     {
 674       SYMBOL_VALUE (entry->symbol) += offset;
 675       SYMBOL_SECTION (entry->symbol) = secnum;
 676
 677       entry = entry->next;
 678     }
 679   blk->secnum = secnum;
 680 }
 681
 682 /* Patch all commons named "name" that need patching.Since COMMON
 683    blocks occur with relative infrequency, we simply do a linear scan on
 684    the name.  Eventually, the best way to do this will be a
 685    hashed-lookup.  Secnum is the section number for the .bss section
 686    (which is where common data lives). */
 687
 688 static void
 689 patch_all_commons_by_name (char *name, CORE_ADDR offset, int secnum)
 690 {
 691
 692   SAVED_F77_COMMON_PTR tmp;
 693
 694   /* For blank common blocks, change the canonical reprsentation
 695      of a blank name */
 696
 697   if (strcmp (name, BLANK_COMMON_NAME_ORIGINAL) == 0
 698       || strcmp (name, BLANK_COMMON_NAME_MF77) == 0)
 699     {
 700       xfree (name);
 701       name = alloca (strlen (BLANK_COMMON_NAME_LOCAL) + 1);
 702       strcpy (name, BLANK_COMMON_NAME_LOCAL);
 703     }
 704
 705   tmp = head_common_list;
 706
 707   while (tmp != NULL)
 708     {
 709       if (COMMON_NEEDS_PATCHING (tmp))
 710         if (strcmp (tmp->name, name) == 0)
 711           patch_common_entries (tmp, offset, secnum);
 712
 713       tmp = tmp->next;
 714     }
 715 }
 716 #endif
 717
 718 /* This macro adds the symbol-number for the start of the function
 719    (the symbol number of the .bf) referenced by symnum_fcn to a
 720    list.  This list, in reality should be a FIFO queue but since
 721    #line pragmas sometimes cause line ranges to get messed up
 722    we simply create a linear list.  This list can then be searched
 723    first by a queueing algorithm and upon failure fall back to
 724    a linear scan. */
 725
 726 #if 0
 727 #define ADD_BF_SYMNUM(bf_sym,fcn_sym) \
 728   \
 729   if (saved_bf_list == NULL) \
 730 { \
 731     tmp_bf_ptr = allocate_saved_bf_node(); \
 732       \
 733         tmp_bf_ptr->symnum_bf = (bf_sym); \
 734           tmp_bf_ptr->symnum_fcn = (fcn_sym);  \
 735             tmp_bf_ptr->next = NULL; \
 736               \
 737                 current_head_bf_list = saved_bf_list = tmp_bf_ptr; \
 738                   saved_bf_list_end = tmp_bf_ptr; \
 739                   } \
 740 else \
 741 {  \
 742      tmp_bf_ptr = allocate_saved_bf_node(); \
 743        \
 744          tmp_bf_ptr->symnum_bf = (bf_sym);  \
 745            tmp_bf_ptr->symnum_fcn = (fcn_sym);  \
 746              tmp_bf_ptr->next = NULL;  \
 747                \
 748                  saved_bf_list_end->next = tmp_bf_ptr;  \
 749                    saved_bf_list_end = tmp_bf_ptr; \
 750                    }
 751 #endif
 752
 753 /* This function frees the entire (.bf,function) list */
 754
 755 #if 0
 756 static void
 757 clear_bf_list (void)
 758 {
 759
 760   SAVED_BF_PTR tmp = saved_bf_list;
 761   SAVED_BF_PTR next = NULL;
 762
 763   while (tmp != NULL)
 764     {
 765       next = tmp->next;
 766       xfree (tmp);
 767       tmp = next;
 768     }
 769   saved_bf_list = NULL;
 770 }
 771 #endif
 772
 773 int global_remote_debug;
 774
 775 #if 0
 776
 777 static long
 778 get_bf_for_fcn (long the_function)
 779 {
 780   SAVED_BF_PTR tmp;
 781   int nprobes = 0;
 782
 783   /* First use a simple queuing algorithm (i.e. look and see if the
 784      item at the head of the queue is the one you want)  */
 785
 786   if (saved_bf_list == NULL)
 787     internal_error (__FILE__, __LINE__,
 788                     _("cannot get .bf node off empty list"));
 789
 790   if (current_head_bf_list != NULL)
 791     if (current_head_bf_list->symnum_fcn == the_function)
 792       {
 793         if (global_remote_debug)
 794           fprintf_unfiltered (gdb_stderr, "*");
 795
 796         tmp = current_head_bf_list;
 797         current_head_bf_list = current_head_bf_list->next;
 798         return (tmp->symnum_bf);
 799       }
 800
 801   /* If the above did not work (probably because #line directives were
 802      used in the sourcefile and they messed up our internal tables) we now do
 803      the ugly linear scan */
 804
 805   if (global_remote_debug)
 806     fprintf_unfiltered (gdb_stderr, "\ndefaulting to linear scan\n");
 807
 808   nprobes = 0;
 809   tmp = saved_bf_list;
 810   while (tmp != NULL)
 811     {
 812       nprobes++;
 813       if (tmp->symnum_fcn == the_function)
 814         {
 815           if (global_remote_debug)
 816             fprintf_unfiltered (gdb_stderr, "Found in %d probes\n", nprobes);
 817           current_head_bf_list = tmp->next;
 818           return (tmp->symnum_bf);
 819         }
 820       tmp = tmp->next;
 821     }
 822
 823   return (-1);
 824 }
 825
 826 static SAVED_FUNCTION_PTR saved_function_list = NULL;
 827 static SAVED_FUNCTION_PTR saved_function_list_end = NULL;
 828
 829 static void
 830 clear_function_list (void)
 831 {
 832   SAVED_FUNCTION_PTR tmp = saved_function_list;
 833   SAVED_FUNCTION_PTR next = NULL;
 834
 835   while (tmp != NULL)
 836     {
 837       next = tmp->next;
 838       xfree (tmp);
 839       tmp = next;
 840     }
 841
 842   saved_function_list = NULL;
 843 }
 844 #endif