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   default_get_string,
 347   LANG_MAGIC
 348 };
 349
 350 static void *
 351 build_fortran_types (struct gdbarch *gdbarch)
 352 {
 353   struct builtin_f_type *builtin_f_type
 354     = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct builtin_f_type);
 355
 356   builtin_f_type->builtin_void =
 357     init_type (TYPE_CODE_VOID, 1,
 358                0,
 359                "VOID", (struct objfile *) NULL);
 360
 361   builtin_f_type->builtin_character =
 362     init_type (TYPE_CODE_INT, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 363                0,
 364                "character", (struct objfile *) NULL);
 365
 366   builtin_f_type->builtin_logical_s1 =
 367     init_type (TYPE_CODE_BOOL, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 368                TYPE_FLAG_UNSIGNED,
 369                "logical*1", (struct objfile *) NULL);
 370
 371   builtin_f_type->builtin_integer_s2 =
 372     init_type (TYPE_CODE_INT,
 373                gdbarch_short_bit (gdbarch) / TARGET_CHAR_BIT,
 374                0, "integer*2", (struct objfile *) NULL);
 375
 376   builtin_f_type->builtin_logical_s2 =
 377     init_type (TYPE_CODE_BOOL,
 378                gdbarch_short_bit (gdbarch) / TARGET_CHAR_BIT,
 379                TYPE_FLAG_UNSIGNED, "logical*2", (struct objfile *) NULL);
 380
 381   builtin_f_type->builtin_integer =
 382     init_type (TYPE_CODE_INT,
 383                gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT,
 384                0, "integer", (struct objfile *) NULL);
 385
 386   builtin_f_type->builtin_logical =
 387     init_type (TYPE_CODE_BOOL,
 388                gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT,
 389                TYPE_FLAG_UNSIGNED, "logical*4", (struct objfile *) NULL);
 390
 391   builtin_f_type->builtin_real =
 392     init_type (TYPE_CODE_FLT,
 393                gdbarch_float_bit (gdbarch) / TARGET_CHAR_BIT,
 394                0,
 395                "real", (struct objfile *) NULL);
 396
 397   builtin_f_type->builtin_real_s8 =
 398     init_type (TYPE_CODE_FLT,
 399                gdbarch_double_bit (gdbarch) / TARGET_CHAR_BIT,
 400                0,
 401                "real*8", (struct objfile *) NULL);
 402
 403   builtin_f_type->builtin_real_s16 =
 404     init_type (TYPE_CODE_FLT,
 405                gdbarch_long_double_bit (gdbarch) / TARGET_CHAR_BIT,
 406                0,
 407                "real*16", (struct objfile *) NULL);
 408
 409   builtin_f_type->builtin_complex_s8 =
 410     init_type (TYPE_CODE_COMPLEX,
 411                2 * gdbarch_float_bit (gdbarch) / TARGET_CHAR_BIT,
 412                0,
 413                "complex*8", (struct objfile *) NULL);
 414   TYPE_TARGET_TYPE (builtin_f_type->builtin_complex_s8)
 415     = builtin_f_type->builtin_real;
 416
 417   builtin_f_type->builtin_complex_s16 =
 418     init_type (TYPE_CODE_COMPLEX,
 419                2 * gdbarch_double_bit (gdbarch) / TARGET_CHAR_BIT,
 420                0,
 421                "complex*16", (struct objfile *) NULL);
 422   TYPE_TARGET_TYPE (builtin_f_type->builtin_complex_s16)
 423     = builtin_f_type->builtin_real_s8;
 424
 425   /* We have a new size == 4 double floats for the
 426      complex*32 data type */
 427
 428   builtin_f_type->builtin_complex_s32 =
 429     init_type (TYPE_CODE_COMPLEX,
 430                2 * gdbarch_long_double_bit (gdbarch) / TARGET_CHAR_BIT,
 431                0,
 432                "complex*32", (struct objfile *) NULL);
 433   TYPE_TARGET_TYPE (builtin_f_type->builtin_complex_s32)
 434     = builtin_f_type->builtin_real_s16;
 435
 436   return builtin_f_type;
 437 }
 438
 439 static struct gdbarch_data *f_type_data;
 440
 441 const struct builtin_f_type *
 442 builtin_f_type (struct gdbarch *gdbarch)
 443 {
 444   return gdbarch_data (gdbarch, f_type_data);
 445 }
 446
 447 void
 448 _initialize_f_language (void)
 449 {
 450   f_type_data = gdbarch_data_register_post_init (build_fortran_types);
 451
 452   add_language (&f_language_defn);
 453 }
 454
 455 #if 0
 456 static SAVED_BF_PTR
 457 allocate_saved_bf_node (void)
 458 {
 459   SAVED_BF_PTR new;
 460
 461   new = (SAVED_BF_PTR) xmalloc (sizeof (SAVED_BF));
 462   return (new);
 463 }
 464
 465 static SAVED_FUNCTION *
 466 allocate_saved_function_node (void)
 467 {
 468   SAVED_FUNCTION *new;
 469
 470   new = (SAVED_FUNCTION *) xmalloc (sizeof (SAVED_FUNCTION));
 471   return (new);
 472 }
 473
 474 static SAVED_F77_COMMON_PTR
 475 allocate_saved_f77_common_node (void)
 476 {
 477   SAVED_F77_COMMON_PTR new;
 478
 479   new = (SAVED_F77_COMMON_PTR) xmalloc (sizeof (SAVED_F77_COMMON));
 480   return (new);
 481 }
 482
 483 static COMMON_ENTRY_PTR
 484 allocate_common_entry_node (void)
 485 {
 486   COMMON_ENTRY_PTR new;
 487
 488   new = (COMMON_ENTRY_PTR) xmalloc (sizeof (COMMON_ENTRY));
 489   return (new);
 490 }
 491 #endif
 492
 493 SAVED_F77_COMMON_PTR head_common_list = NULL;   /* Ptr to 1st saved COMMON  */
 494 SAVED_F77_COMMON_PTR tail_common_list = NULL;   /* Ptr to last saved COMMON  */
 495 SAVED_F77_COMMON_PTR current_common = NULL;     /* Ptr to current COMMON */
 496
 497 #if 0
 498 static SAVED_BF_PTR saved_bf_list = NULL;       /* Ptr to (.bf,function)
 499                                                    list */
 500 static SAVED_BF_PTR saved_bf_list_end = NULL;   /* Ptr to above list's end */
 501 static SAVED_BF_PTR current_head_bf_list = NULL;        /* Current head of above list
 502                                                          */
 503
 504 static SAVED_BF_PTR tmp_bf_ptr; /* Generic temporary for use
 505                                    in macros */
 506
 507 /* The following function simply enters a given common block onto
 508    the global common block chain */
 509
 510 static void
 511 add_common_block (char *name, CORE_ADDR offset, int secnum, char *func_stab)
 512 {
 513   SAVED_F77_COMMON_PTR tmp;
 514   char *c, *local_copy_func_stab;
 515
 516   /* If the COMMON block we are trying to add has a blank
 517      name (i.e. "#BLNK_COM") then we set it to __BLANK
 518      because the darn "#" character makes GDB's input
 519      parser have fits. */
 520
 521
 522   if (strcmp (name, BLANK_COMMON_NAME_ORIGINAL) == 0
 523       || strcmp (name, BLANK_COMMON_NAME_MF77) == 0)
 524     {
 525
 526       xfree (name);
 527       name = alloca (strlen (BLANK_COMMON_NAME_LOCAL) + 1);
 528       strcpy (name, BLANK_COMMON_NAME_LOCAL);
 529     }
 530
 531   tmp = allocate_saved_f77_common_node ();
 532
 533   local_copy_func_stab = xmalloc (strlen (func_stab) + 1);
 534   strcpy (local_copy_func_stab, func_stab);
 535
 536   tmp->name = xmalloc (strlen (name) + 1);
 537
 538   /* local_copy_func_stab is a stabstring, let us first extract the
 539      function name from the stab by NULLing out the ':' character. */
 540
 541
 542   c = NULL;
 543   c = strchr (local_copy_func_stab, ':');
 544
 545   if (c)
 546     *c = '\0';
 547   else
 548     error (_("Malformed function STAB found in add_common_block()"));
 549
 550
 551   tmp->owning_function = xmalloc (strlen (local_copy_func_stab) + 1);
 552
 553   strcpy (tmp->owning_function, local_copy_func_stab);
 554
 555   strcpy (tmp->name, name);
 556   tmp->offset = offset;
 557   tmp->next = NULL;
 558   tmp->entries = NULL;
 559   tmp->secnum = secnum;
 560
 561   current_common = tmp;
 562
 563   if (head_common_list == NULL)
 564     {
 565       head_common_list = tail_common_list = tmp;
 566     }
 567   else
 568     {
 569       tail_common_list->next = tmp;
 570       tail_common_list = tmp;
 571     }
 572 }
 573 #endif
 574
 575 /* The following function simply enters a given common entry onto
 576    the "current_common" block that has been saved away. */
 577
 578 #if 0
 579 static void
 580 add_common_entry (struct symbol *entry_sym_ptr)
 581 {
 582   COMMON_ENTRY_PTR tmp;
 583
 584
 585
 586   /* The order of this list is important, since
 587      we expect the entries to appear in decl.
 588      order when we later issue "info common" calls */
 589
 590   tmp = allocate_common_entry_node ();
 591
 592   tmp->next = NULL;
 593   tmp->symbol = entry_sym_ptr;
 594
 595   if (current_common == NULL)
 596     error (_("Attempt to add COMMON entry with no block open!"));
 597   else
 598     {
 599       if (current_common->entries == NULL)
 600         {
 601           current_common->entries = tmp;
 602           current_common->end_of_entries = tmp;
 603         }
 604       else
 605         {
 606           current_common->end_of_entries->next = tmp;
 607           current_common->end_of_entries = tmp;
 608         }
 609     }
 610 }
 611 #endif
 612
 613 /* This routine finds the first encountred COMMON block named "name" */
 614
 615 #if 0
 616 static SAVED_F77_COMMON_PTR
 617 find_first_common_named (char *name)
 618 {
 619
 620   SAVED_F77_COMMON_PTR tmp;
 621
 622   tmp = head_common_list;
 623
 624   while (tmp != NULL)
 625     {
 626       if (strcmp (tmp->name, name) == 0)
 627         return (tmp);
 628       else
 629         tmp = tmp->next;
 630     }
 631   return (NULL);
 632 }
 633 #endif
 634
 635 /* This routine finds the first encountred COMMON block named "name"
 636    that belongs to function funcname */
 637
 638 SAVED_F77_COMMON_PTR
 639 find_common_for_function (char *name, char *funcname)
 640 {
 641
 642   SAVED_F77_COMMON_PTR tmp;
 643
 644   tmp = head_common_list;
 645
 646   while (tmp != NULL)
 647     {
 648       if (strcmp (tmp->name, name) == 0
 649           && strcmp (tmp->owning_function, funcname) == 0)
 650         return (tmp);
 651       else
 652         tmp = tmp->next;
 653     }
 654   return (NULL);
 655 }
 656
 657
 658 #if 0
 659
 660 /* The following function is called to patch up the offsets
 661    for the statics contained in the COMMON block named
 662    "name."  */
 663
 664 static void
 665 patch_common_entries (SAVED_F77_COMMON_PTR blk, CORE_ADDR offset, int secnum)
 666 {
 667   COMMON_ENTRY_PTR entry;
 668
 669   blk->offset = offset;         /* Keep this around for future use. */
 670
 671   entry = blk->entries;
 672
 673   while (entry != NULL)
 674     {
 675       SYMBOL_VALUE (entry->symbol) += offset;
 676       SYMBOL_SECTION (entry->symbol) = secnum;
 677
 678       entry = entry->next;
 679     }
 680   blk->secnum = secnum;
 681 }
 682
 683 /* Patch all commons named "name" that need patching.Since COMMON
 684    blocks occur with relative infrequency, we simply do a linear scan on
 685    the name.  Eventually, the best way to do this will be a
 686    hashed-lookup.  Secnum is the section number for the .bss section
 687    (which is where common data lives). */
 688
 689 static void
 690 patch_all_commons_by_name (char *name, CORE_ADDR offset, int secnum)
 691 {
 692
 693   SAVED_F77_COMMON_PTR tmp;
 694
 695   /* For blank common blocks, change the canonical reprsentation
 696      of a blank name */
 697
 698   if (strcmp (name, BLANK_COMMON_NAME_ORIGINAL) == 0
 699       || strcmp (name, BLANK_COMMON_NAME_MF77) == 0)
 700     {
 701       xfree (name);
 702       name = alloca (strlen (BLANK_COMMON_NAME_LOCAL) + 1);
 703       strcpy (name, BLANK_COMMON_NAME_LOCAL);
 704     }
 705
 706   tmp = head_common_list;
 707
 708   while (tmp != NULL)
 709     {
 710       if (COMMON_NEEDS_PATCHING (tmp))
 711         if (strcmp (tmp->name, name) == 0)
 712           patch_common_entries (tmp, offset, secnum);
 713
 714       tmp = tmp->next;
 715     }
 716 }
 717 #endif
 718
 719 /* This macro adds the symbol-number for the start of the function
 720    (the symbol number of the .bf) referenced by symnum_fcn to a
 721    list.  This list, in reality should be a FIFO queue but since
 722    #line pragmas sometimes cause line ranges to get messed up
 723    we simply create a linear list.  This list can then be searched
 724    first by a queueing algorithm and upon failure fall back to
 725    a linear scan. */
 726
 727 #if 0
 728 #define ADD_BF_SYMNUM(bf_sym,fcn_sym) \
 729   \
 730   if (saved_bf_list == NULL) \
 731 { \
 732     tmp_bf_ptr = allocate_saved_bf_node(); \
 733       \
 734         tmp_bf_ptr->symnum_bf = (bf_sym); \
 735           tmp_bf_ptr->symnum_fcn = (fcn_sym);  \
 736             tmp_bf_ptr->next = NULL; \
 737               \
 738                 current_head_bf_list = saved_bf_list = tmp_bf_ptr; \
 739                   saved_bf_list_end = tmp_bf_ptr; \
 740                   } \
 741 else \
 742 {  \
 743      tmp_bf_ptr = allocate_saved_bf_node(); \
 744        \
 745          tmp_bf_ptr->symnum_bf = (bf_sym);  \
 746            tmp_bf_ptr->symnum_fcn = (fcn_sym);  \
 747              tmp_bf_ptr->next = NULL;  \
 748                \
 749                  saved_bf_list_end->next = tmp_bf_ptr;  \
 750                    saved_bf_list_end = tmp_bf_ptr; \
 751                    }
 752 #endif
 753
 754 /* This function frees the entire (.bf,function) list */
 755
 756 #if 0
 757 static void
 758 clear_bf_list (void)
 759 {
 760
 761   SAVED_BF_PTR tmp = saved_bf_list;
 762   SAVED_BF_PTR next = NULL;
 763
 764   while (tmp != NULL)
 765     {
 766       next = tmp->next;
 767       xfree (tmp);
 768       tmp = next;
 769     }
 770   saved_bf_list = NULL;
 771 }
 772 #endif
 773
 774 int global_remote_debug;
 775
 776 #if 0
 777
 778 static long
 779 get_bf_for_fcn (long the_function)
 780 {
 781   SAVED_BF_PTR tmp;
 782   int nprobes = 0;
 783
 784   /* First use a simple queuing algorithm (i.e. look and see if the
 785      item at the head of the queue is the one you want)  */
 786
 787   if (saved_bf_list == NULL)
 788     internal_error (__FILE__, __LINE__,
 789                     _("cannot get .bf node off empty list"));
 790
 791   if (current_head_bf_list != NULL)
 792     if (current_head_bf_list->symnum_fcn == the_function)
 793       {
 794         if (global_remote_debug)
 795           fprintf_unfiltered (gdb_stderr, "*");
 796
 797         tmp = current_head_bf_list;
 798         current_head_bf_list = current_head_bf_list->next;
 799         return (tmp->symnum_bf);
 800       }
 801
 802   /* If the above did not work (probably because #line directives were
 803      used in the sourcefile and they messed up our internal tables) we now do
 804      the ugly linear scan */
 805
 806   if (global_remote_debug)
 807     fprintf_unfiltered (gdb_stderr, "\ndefaulting to linear scan\n");
 808
 809   nprobes = 0;
 810   tmp = saved_bf_list;
 811   while (tmp != NULL)
 812     {
 813       nprobes++;
 814       if (tmp->symnum_fcn == the_function)
 815         {
 816           if (global_remote_debug)
 817             fprintf_unfiltered (gdb_stderr, "Found in %d probes\n", nprobes);
 818           current_head_bf_list = tmp->next;
 819           return (tmp->symnum_bf);
 820         }
 821       tmp = tmp->next;
 822     }
 823
 824   return (-1);
 825 }
 826
 827 static SAVED_FUNCTION_PTR saved_function_list = NULL;
 828 static SAVED_FUNCTION_PTR saved_function_list_end = NULL;
 829
 830 static void
 831 clear_function_list (void)
 832 {
 833   SAVED_FUNCTION_PTR tmp = saved_function_list;
 834   SAVED_FUNCTION_PTR next = NULL;
 835
 836   while (tmp != NULL)
 837     {
 838       next = tmp->next;
 839       xfree (tmp);
 840       tmp = next;
 841     }
 842
 843   saved_function_list = NULL;
 844 }
 845 #endif