binutils/wrstabs.c

   1 /* wrstabs.c -- Output stabs debugging information
   2    Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2006, 2007
   3    Free Software Foundation, Inc.
   4    Written by Ian Lance Taylor <ian@cygnus.com>.
   5
   6    This file is part of GNU Binutils.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
  21    02110-1301, USA.  */
  22
  23 /* This file contains code which writes out stabs debugging
  24    information.  */
  25
  26 #include "sysdep.h"
  27 #include <assert.h>
  28 #include "bfd.h"
  29 #include "libiberty.h"
  30 #include "safe-ctype.h"
  31 #include "bucomm.h"
  32 #include "debug.h"
  33 #include "budbg.h"
  34 #include "aout/aout64.h"
  35 #include "aout/stab_gnu.h"
  36
  37 /* The size of a stabs symbol.  This presumes 32 bit values.  */
  38
  39 #define STAB_SYMBOL_SIZE (12)
  40
  41 /* An entry in a string hash table.  */
  42
  43 struct string_hash_entry
  44 {
  45   struct bfd_hash_entry root;
  46   /* Next string in this table.  */
  47   struct string_hash_entry *next;
  48   /* Index in string table.  */
  49   long index;
  50   /* Size of type if this is a typedef.  */
  51   unsigned int size;
  52 };
  53
  54 /* A string hash table.  */
  55
  56 struct string_hash_table
  57 {
  58   struct bfd_hash_table table;
  59 };
  60
  61 /* The type stack.  Each element on the stack is a string.  */
  62
  63 struct stab_type_stack
  64 {
  65   /* The next element on the stack.  */
  66   struct stab_type_stack *next;
  67   /* This element as a string.  */
  68   char *string;
  69   /* The type index of this element.  */
  70   long index;
  71   /* The size of the type.  */
  72   unsigned int size;
  73   /* Whether type string defines a new type.  */
  74   bfd_boolean definition;
  75   /* String defining struct fields.  */
  76   char *fields;
  77   /* NULL terminated array of strings defining base classes for a
  78      class.  */
  79   char **baseclasses;
  80   /* String defining class methods.  */
  81   char *methods;
  82   /* String defining vtable pointer for a class.  */
  83   char *vtable;
  84 };
  85
  86 /* This structure is used to keep track of type indices for tagged
  87    types.  */
  88
  89 struct stab_tag
  90 {
  91   /* The type index.  */
  92   long index;
  93   /* The tag name.  */
  94   const char *tag;
  95   /* The kind of type.  This is set to DEBUG_KIND_ILLEGAL when the
  96      type is defined.  */
  97   enum debug_type_kind kind;
  98   /* The size of the struct.  */
  99   unsigned int size;
 100 };
 101
 102 /* We remember various sorts of type indices.  They are not related,
 103    but, for convenience, we keep all the information in this
 104    structure.  */
 105
 106 struct stab_type_cache
 107 {
 108   /* The void type index.  */
 109   long void_type;
 110   /* Signed integer type indices, indexed by size - 1.  */
 111   long signed_integer_types[8];
 112   /* Unsigned integer type indices, indexed by size - 1.  */
 113   long unsigned_integer_types[8];
 114   /* Floating point types, indexed by size - 1.  */
 115   long float_types[16];
 116   /* Pointers to types, indexed by the type index.  */
 117   long *pointer_types;
 118   size_t pointer_types_alloc;
 119   /* Functions returning types, indexed by the type index.  */
 120   long *function_types;
 121   size_t function_types_alloc;
 122   /* References to types, indexed by the type index.  */
 123   long *reference_types;
 124   size_t reference_types_alloc;
 125   /* Struct/union/class type indices, indexed by the struct id.  */
 126   struct stab_tag *struct_types;
 127   size_t struct_types_alloc;
 128 };
 129
 130 /* This is the handle passed through debug_write.  */
 131
 132 struct stab_write_handle
 133 {
 134   /* The BFD.  */
 135   bfd *abfd;
 136   /* This buffer holds the symbols.  */
 137   bfd_byte *symbols;
 138   size_t symbols_size;
 139   size_t symbols_alloc;
 140   /* This is a list of hash table entries for the strings.  */
 141   struct string_hash_entry *strings;
 142   /* The last string hash table entry.  */
 143   struct string_hash_entry *last_string;
 144   /* The size of the strings.  */
 145   size_t strings_size;
 146   /* This hash table eliminates duplicate strings.  */
 147   struct string_hash_table strhash;
 148   /* The type stack.  */
 149   struct stab_type_stack *type_stack;
 150   /* The next type index.  */
 151   long type_index;
 152   /* The type cache.  */
 153   struct stab_type_cache type_cache;
 154   /* A mapping from typedef names to type indices.  */
 155   struct string_hash_table typedef_hash;
 156   /* If this is not -1, it is the offset to the most recent N_SO
 157      symbol, and the value of that symbol needs to be set.  */
 158   long so_offset;
 159   /* If this is not -1, it is the offset to the most recent N_FUN
 160      symbol, and the value of that symbol needs to be set.  */
 161   long fun_offset;
 162   /* The last text section address seen.  */
 163   bfd_vma last_text_address;
 164   /* The block nesting depth.  */
 165   unsigned int nesting;
 166   /* The function address.  */
 167   bfd_vma fnaddr;
 168   /* A pending LBRAC symbol.  */
 169   bfd_vma pending_lbrac;
 170   /* The current line number file name.  */
 171   const char *lineno_filename;
 172 };
 173
 174 static struct bfd_hash_entry *string_hash_newfunc
 175   (struct bfd_hash_entry *, struct bfd_hash_table *, const char *);
 176 static bfd_boolean stab_write_symbol
 177   (struct stab_write_handle *, int, int, bfd_vma, const char *);
 178 static bfd_boolean stab_push_string
 179   (struct stab_write_handle *, const char *, long, bfd_boolean, unsigned int);
 180 static bfd_boolean stab_push_defined_type
 181   (struct stab_write_handle *, long, unsigned int);
 182 static char *stab_pop_type (struct stab_write_handle *);
 183 static bfd_boolean stab_modify_type
 184   (struct stab_write_handle *, int, unsigned int, long **, size_t *);
 185 static long stab_get_struct_index
 186   (struct stab_write_handle *, const char *, unsigned int,
 187    enum debug_type_kind, unsigned int *);
 188 static bfd_boolean stab_class_method_var
 189   (struct stab_write_handle *, const char *, enum debug_visibility,
 190    bfd_boolean, bfd_boolean, bfd_boolean, bfd_vma, bfd_boolean);
 191 static bfd_boolean stab_start_compilation_unit (void *, const char *);
 192 static bfd_boolean stab_start_source (void *, const char *);
 193 static bfd_boolean stab_empty_type (void *);
 194 static bfd_boolean stab_void_type (void *);
 195 static bfd_boolean stab_int_type (void *, unsigned int, bfd_boolean);
 196 static bfd_boolean stab_float_type (void *, unsigned int);
 197 static bfd_boolean stab_complex_type (void *, unsigned int);
 198 static bfd_boolean stab_bool_type (void *, unsigned int);
 199 static bfd_boolean stab_enum_type
 200   (void *, const char *, const char **, bfd_signed_vma *);
 201 static bfd_boolean stab_pointer_type (void *);
 202 static bfd_boolean stab_function_type (void *, int, bfd_boolean);
 203 static bfd_boolean stab_reference_type (void *);
 204 static bfd_boolean stab_range_type (void *, bfd_signed_vma, bfd_signed_vma);
 205 static bfd_boolean stab_array_type
 206   (void *, bfd_signed_vma, bfd_signed_vma, bfd_boolean);
 207 static bfd_boolean stab_set_type (void *, bfd_boolean);
 208 static bfd_boolean stab_offset_type (void *);
 209 static bfd_boolean stab_method_type (void *, bfd_boolean, int, bfd_boolean);
 210 static bfd_boolean stab_const_type (void *);
 211 static bfd_boolean stab_volatile_type (void *);
 212 static bfd_boolean stab_start_struct_type
 213   (void *, const char *, unsigned int, bfd_boolean, unsigned int);
 214 static bfd_boolean stab_struct_field
 215   (void *, const char *, bfd_vma, bfd_vma, enum debug_visibility);
 216 static bfd_boolean stab_end_struct_type (void *);
 217 static bfd_boolean stab_start_class_type
 218   (void *, const char *, unsigned int, bfd_boolean, unsigned int,
 219    bfd_boolean, bfd_boolean);
 220 static bfd_boolean stab_class_static_member
 221   (void *, const char *, const char *, enum debug_visibility);
 222 static bfd_boolean stab_class_baseclass
 223   (void *, bfd_vma, bfd_boolean, enum debug_visibility);
 224 static bfd_boolean stab_class_start_method (void *, const char *);
 225 static bfd_boolean stab_class_method_variant
 226   (void *, const char *, enum debug_visibility, bfd_boolean, bfd_boolean,
 227    bfd_vma, bfd_boolean);
 228 static bfd_boolean stab_class_static_method_variant
 229   (void *, const char *, enum debug_visibility, bfd_boolean, bfd_boolean);
 230 static bfd_boolean stab_class_end_method (void *);
 231 static bfd_boolean stab_end_class_type (void *);
 232 static bfd_boolean stab_typedef_type (void *, const char *);
 233 static bfd_boolean stab_tag_type
 234   (void *, const char *, unsigned int, enum debug_type_kind);
 235 static bfd_boolean stab_typdef (void *, const char *);
 236 static bfd_boolean stab_tag (void *, const char *);
 237 static bfd_boolean stab_int_constant (void *, const char *, bfd_vma);
 238 static bfd_boolean stab_float_constant (void *, const char *, double);
 239 static bfd_boolean stab_typed_constant (void *, const char *, bfd_vma);
 240 static bfd_boolean stab_variable
 241   (void *, const char *, enum debug_var_kind, bfd_vma);
 242 static bfd_boolean stab_start_function (void *, const char *, bfd_boolean);
 243 static bfd_boolean stab_function_parameter
 244   (void *, const char *, enum debug_parm_kind, bfd_vma);
 245 static bfd_boolean stab_start_block (void *, bfd_vma);
 246 static bfd_boolean stab_end_block (void *, bfd_vma);
 247 static bfd_boolean stab_end_function (void *);
 248 static bfd_boolean stab_lineno (void *, const char *, unsigned long, bfd_vma);
 249
 250 static const struct debug_write_fns stab_fns =
 251 {
 252   stab_start_compilation_unit,
 253   stab_start_source,
 254   stab_empty_type,
 255   stab_void_type,
 256   stab_int_type,
 257   stab_float_type,
 258   stab_complex_type,
 259   stab_bool_type,
 260   stab_enum_type,
 261   stab_pointer_type,
 262   stab_function_type,
 263   stab_reference_type,
 264   stab_range_type,
 265   stab_array_type,
 266   stab_set_type,
 267   stab_offset_type,
 268   stab_method_type,
 269   stab_const_type,
 270   stab_volatile_type,
 271   stab_start_struct_type,
 272   stab_struct_field,
 273   stab_end_struct_type,
 274   stab_start_class_type,
 275   stab_class_static_member,
 276   stab_class_baseclass,
 277   stab_class_start_method,
 278   stab_class_method_variant,
 279   stab_class_static_method_variant,
 280   stab_class_end_method,
 281   stab_end_class_type,
 282   stab_typedef_type,
 283   stab_tag_type,
 284   stab_typdef,
 285   stab_tag,
 286   stab_int_constant,
 287   stab_float_constant,
 288   stab_typed_constant,
 289   stab_variable,
 290   stab_start_function,
 291   stab_function_parameter,
 292   stab_start_block,
 293   stab_end_block,
 294   stab_end_function,
 295   stab_lineno
 296 };
 297 \f
 298 /* Routine to create an entry in a string hash table.  */
 299
 300 static struct bfd_hash_entry *
 301 string_hash_newfunc (struct bfd_hash_entry *entry,
 302                      struct bfd_hash_table *table, const char *string)
 303 {
 304   struct string_hash_entry *ret = (struct string_hash_entry *) entry;
 305
 306   /* Allocate the structure if it has not already been allocated by a
 307      subclass.  */
 308   if (ret == (struct string_hash_entry *) NULL)
 309     ret = ((struct string_hash_entry *)
 310            bfd_hash_allocate (table, sizeof (struct string_hash_entry)));
 311   if (ret == (struct string_hash_entry *) NULL)
 312     return NULL;
 313
 314   /* Call the allocation method of the superclass.  */
 315   ret = ((struct string_hash_entry *)
 316          bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string));
 317
 318   if (ret)
 319     {
 320       /* Initialize the local fields.  */
 321       ret->next = NULL;
 322       ret->index = -1;
 323       ret->size = 0;
 324     }
 325
 326   return (struct bfd_hash_entry *) ret;
 327 }
 328
 329 /* Look up an entry in a string hash table.  */
 330
 331 #define string_hash_lookup(t, string, create, copy) \
 332   ((struct string_hash_entry *) \
 333    bfd_hash_lookup (&(t)->table, (string), (create), (copy)))
 334
 335 /* Add a symbol to the stabs debugging information we are building.  */
 336
 337 static bfd_boolean
 338 stab_write_symbol (struct stab_write_handle *info, int type, int desc,
 339                    bfd_vma value, const char *string)
 340 {
 341   bfd_size_type strx;
 342   bfd_byte sym[STAB_SYMBOL_SIZE];
 343
 344   if (string == NULL)
 345     strx = 0;
 346   else
 347     {
 348       struct string_hash_entry *h;
 349
 350       h = string_hash_lookup (&info->strhash, string, TRUE, TRUE);
 351       if (h == NULL)
 352         {
 353           non_fatal (_("string_hash_lookup failed: %s"),
 354                      bfd_errmsg (bfd_get_error ()));
 355           return FALSE;
 356         }
 357       if (h->index != -1)
 358         strx = h->index;
 359       else
 360         {
 361           strx = info->strings_size;
 362           h->index = strx;
 363           if (info->last_string == NULL)
 364             info->strings = h;
 365           else
 366             info->last_string->next = h;
 367           info->last_string = h;
 368           info->strings_size += strlen (string) + 1;
 369         }
 370     }
 371
 372   /* This presumes 32 bit values.  */
 373   bfd_put_32 (info->abfd, strx, sym);
 374   bfd_put_8 (info->abfd, type, sym + 4);
 375   bfd_put_8 (info->abfd, 0, sym + 5);
 376   bfd_put_16 (info->abfd, desc, sym + 6);
 377   bfd_put_32 (info->abfd, value, sym + 8);
 378
 379   if (info->symbols_size + STAB_SYMBOL_SIZE > info->symbols_alloc)
 380     {
 381       info->symbols_alloc *= 2;
 382       info->symbols = (bfd_byte *) xrealloc (info->symbols,
 383                                              info->symbols_alloc);
 384     }
 385
 386   memcpy (info->symbols + info->symbols_size, sym, STAB_SYMBOL_SIZE);
 387
 388   info->symbols_size += STAB_SYMBOL_SIZE;
 389
 390   return TRUE;
 391 }
 392
 393 /* Push a string on to the type stack.  */
 394
 395 static bfd_boolean
 396 stab_push_string (struct stab_write_handle *info, const char *string,
 397                   long index, bfd_boolean definition, unsigned int size)
 398 {
 399   struct stab_type_stack *s;
 400
 401   s = (struct stab_type_stack *) xmalloc (sizeof *s);
 402   s->string = xstrdup (string);
 403   s->index = index;
 404   s->definition = definition;
 405   s->size = size;
 406
 407   s->fields = NULL;
 408   s->baseclasses = NULL;
 409   s->methods = NULL;
 410   s->vtable = NULL;
 411
 412   s->next = info->type_stack;
 413   info->type_stack = s;
 414
 415   return TRUE;
 416 }
 417
 418 /* Push a type index which has already been defined.  */
 419
 420 static bfd_boolean
 421 stab_push_defined_type (struct stab_write_handle *info, long index,
 422                         unsigned int size)
 423 {
 424   char buf[20];
 425
 426   sprintf (buf, "%ld", index);
 427   return stab_push_string (info, buf, index, FALSE, size);
 428 }
 429
 430 /* Pop a type off the type stack.  The caller is responsible for
 431    freeing the string.  */
 432
 433 static char *
 434 stab_pop_type (struct stab_write_handle *info)
 435 {
 436   struct stab_type_stack *s;
 437   char *ret;
 438
 439   s = info->type_stack;
 440   assert (s != NULL);
 441
 442   info->type_stack = s->next;
 443
 444   ret = s->string;
 445
 446   free (s);
 447
 448   return ret;
 449 }
 450 \f
 451 /* The general routine to write out stabs in sections debugging
 452    information.  This accumulates the stabs symbols and the strings in
 453    two obstacks.  We can't easily write out the information as we go
 454    along, because we need to know the section sizes before we can
 455    write out the section contents.  ABFD is the BFD and DHANDLE is the
 456    handle for the debugging information.  This sets *PSYMS to point to
 457    the symbols, *PSYMSIZE the size of the symbols, *PSTRINGS to the
 458    strings, and *PSTRINGSIZE to the size of the strings.  */
 459
 460 bfd_boolean
 461 write_stabs_in_sections_debugging_info (bfd *abfd, void *dhandle,
 462                                         bfd_byte **psyms,
 463                                         bfd_size_type *psymsize,
 464                                         bfd_byte **pstrings,
 465                                         bfd_size_type *pstringsize)
 466 {
 467   struct stab_write_handle info;
 468   struct string_hash_entry *h;
 469   bfd_byte *p;
 470
 471   info.abfd = abfd;
 472
 473   info.symbols_size = 0;
 474   info.symbols_alloc = 500;
 475   info.symbols = (bfd_byte *) xmalloc (info.symbols_alloc);
 476
 477   info.strings = NULL;
 478   info.last_string = NULL;
 479   /* Reserve 1 byte for a null byte.  */
 480   info.strings_size = 1;
 481
 482   if (!bfd_hash_table_init (&info.strhash.table, string_hash_newfunc,
 483                             sizeof (struct string_hash_entry))
 484       || !bfd_hash_table_init (&info.typedef_hash.table, string_hash_newfunc,
 485                                sizeof (struct string_hash_entry)))
 486     {
 487       non_fatal ("bfd_hash_table_init_failed: %s",
 488                  bfd_errmsg (bfd_get_error ()));
 489       return FALSE;
 490     }
 491
 492   info.type_stack = NULL;
 493   info.type_index = 1;
 494   memset (&info.type_cache, 0, sizeof info.type_cache);
 495   info.so_offset = -1;
 496   info.fun_offset = -1;
 497   info.last_text_address = 0;
 498   info.nesting = 0;
 499   info.fnaddr = 0;
 500   info.pending_lbrac = (bfd_vma) -1;
 501
 502   /* The initial symbol holds the string size.  */
 503   if (! stab_write_symbol (&info, 0, 0, 0, (const char *) NULL))
 504     return FALSE;
 505
 506   /* Output an initial N_SO symbol.  */
 507   info.so_offset = info.symbols_size;
 508   if (! stab_write_symbol (&info, N_SO, 0, 0, bfd_get_filename (abfd)))
 509     return FALSE;
 510
 511   if (! debug_write (dhandle, &stab_fns, (void *) &info))
 512     return FALSE;
 513
 514   assert (info.pending_lbrac == (bfd_vma) -1);
 515
 516   /* Output a trailing N_SO.  */
 517   if (! stab_write_symbol (&info, N_SO, 0, info.last_text_address,
 518                            (const char *) NULL))
 519     return FALSE;
 520
 521   /* Put the string size in the initial symbol.  */
 522   bfd_put_32 (abfd, info.strings_size, info.symbols + 8);
 523
 524   *psyms = info.symbols;
 525   *psymsize = info.symbols_size;
 526
 527   *pstringsize = info.strings_size;
 528   *pstrings = (bfd_byte *) xmalloc (info.strings_size);
 529
 530   p = *pstrings;
 531   *p++ = '\0';
 532   for (h = info.strings; h != NULL; h = h->next)
 533     {
 534       strcpy ((char *) p, h->root.string);
 535       p += strlen ((char *) p) + 1;
 536     }
 537
 538   return TRUE;
 539 }
 540
 541 /* Start writing out information for a compilation unit.  */
 542
 543 static bfd_boolean
 544 stab_start_compilation_unit (void *p, const char *filename)
 545 {
 546   struct stab_write_handle *info = (struct stab_write_handle *) p;
 547
 548   /* We would normally output an N_SO symbol here.  However, that
 549      would force us to reset all of our type information.  I think we
 550      will be better off just outputting an N_SOL symbol, and not
 551      worrying about splitting information between files.  */
 552
 553   info->lineno_filename = filename;
 554
 555   return stab_write_symbol (info, N_SOL, 0, 0, filename);
 556 }
 557
 558 /* Start writing out information for a particular source file.  */
 559
 560 static bfd_boolean
 561 stab_start_source (void *p, const char *filename)
 562 {
 563   struct stab_write_handle *info = (struct stab_write_handle *) p;
 564
 565   /* FIXME: The symbol's value is supposed to be the text section
 566      address.  However, we would have to fill it in later, and gdb
 567      doesn't care, so we don't bother with it.  */
 568
 569   info->lineno_filename = filename;
 570
 571   return stab_write_symbol (info, N_SOL, 0, 0, filename);
 572 }
 573
 574 /* Push an empty type.  This shouldn't normally happen.  We just use a
 575    void type.  */
 576
 577 static bfd_boolean
 578 stab_empty_type (void *p)
 579 {
 580   struct stab_write_handle *info = (struct stab_write_handle *) p;
 581
 582   /* We don't call stab_void_type if the type is not yet defined,
 583      because that might screw up the typedef.  */
 584
 585   if (info->type_cache.void_type != 0)
 586     return stab_push_defined_type (info, info->type_cache.void_type, 0);
 587   else
 588     {
 589       long index;
 590       char buf[40];
 591
 592       index = info->type_index;
 593       ++info->type_index;
 594
 595       sprintf (buf, "%ld=%ld", index, index);
 596
 597       return stab_push_string (info, buf, index, FALSE, 0);
 598     }
 599 }
 600
 601 /* Push a void type.  */
 602
 603 static bfd_boolean
 604 stab_void_type (void *p)
 605 {
 606   struct stab_write_handle *info = (struct stab_write_handle *) p;
 607
 608   if (info->type_cache.void_type != 0)
 609     return stab_push_defined_type (info, info->type_cache.void_type, 0);
 610   else
 611     {
 612       long index;
 613       char buf[40];
 614
 615       index = info->type_index;
 616       ++info->type_index;
 617
 618       info->type_cache.void_type = index;
 619
 620       sprintf (buf, "%ld=%ld", index, index);
 621
 622       return stab_push_string (info, buf, index, TRUE, 0);
 623     }
 624 }
 625
 626 /* Push an integer type.  */
 627
 628 static bfd_boolean
 629 stab_int_type (void *p, unsigned int size, bfd_boolean unsignedp)
 630 {
 631   struct stab_write_handle *info = (struct stab_write_handle *) p;
 632   long *cache;
 633
 634   if (size <= 0 || (size > sizeof (long) && size != 8))
 635     {
 636       non_fatal (_("stab_int_type: bad size %u"), size);
 637       return FALSE;
 638     }
 639
 640   if (unsignedp)
 641     cache = info->type_cache.signed_integer_types;
 642   else
 643     cache = info->type_cache.unsigned_integer_types;
 644
 645   if (cache[size - 1] != 0)
 646     return stab_push_defined_type (info, cache[size - 1], size);
 647   else
 648     {
 649       long index;
 650       char buf[100];
 651
 652       index = info->type_index;
 653       ++info->type_index;
 654
 655       cache[size - 1] = index;
 656
 657       sprintf (buf, "%ld=r%ld;", index, index);
 658       if (unsignedp)
 659         {
 660           strcat (buf, "0;");
 661           if (size < sizeof (long))
 662             sprintf (buf + strlen (buf), "%ld;", ((long) 1 << (size * 8)) - 1);
 663           else if (size == sizeof (long))
 664             strcat (buf, "-1;");
 665           else if (size == 8)
 666             strcat (buf, "01777777777777777777777;");
 667           else
 668             abort ();
 669         }
 670       else
 671         {
 672           if (size <= sizeof (long))
 673             sprintf (buf + strlen (buf), "%ld;%ld;",
 674                      (long) - ((unsigned long) 1 << (size * 8 - 1)),
 675                      (long) (((unsigned long) 1 << (size * 8 - 1)) - 1));
 676           else if (size == 8)
 677             strcat (buf, "01000000000000000000000;0777777777777777777777;");
 678           else
 679             abort ();
 680         }
 681
 682       return stab_push_string (info, buf, index, TRUE, size);
 683     }
 684 }
 685
 686 /* Push a floating point type.  */
 687
 688 static bfd_boolean
 689 stab_float_type (void *p, unsigned int size)
 690 {
 691   struct stab_write_handle *info = (struct stab_write_handle *) p;
 692
 693   if (size > 0
 694       && size - 1 < (sizeof info->type_cache.float_types
 695                      / sizeof info->type_cache.float_types[0])
 696       && info->type_cache.float_types[size - 1] != 0)
 697     return stab_push_defined_type (info,
 698                                    info->type_cache.float_types[size - 1],
 699                                    size);
 700   else
 701     {
 702       long index;
 703       char *int_type;
 704       char buf[50];
 705
 706       /* Floats are defined as a subrange of int.  */
 707       if (! stab_int_type (info, 4, FALSE))
 708         return FALSE;
 709       int_type = stab_pop_type (info);
 710
 711       index = info->type_index;
 712       ++info->type_index;
 713
 714       if (size > 0
 715           && size - 1 < (sizeof info->type_cache.float_types
 716                          / sizeof info->type_cache.float_types[0]))
 717         info->type_cache.float_types[size - 1] = index;
 718
 719       sprintf (buf, "%ld=r%s;%u;0;", index, int_type, size);
 720
 721       free (int_type);
 722
 723       return stab_push_string (info, buf, index, TRUE, size);
 724     }
 725 }
 726
 727 /* Push a complex type.  */
 728
 729 static bfd_boolean
 730 stab_complex_type (void *p, unsigned int size)
 731 {
 732   struct stab_write_handle *info = (struct stab_write_handle *) p;
 733   char buf[50];
 734   long index;
 735
 736   index = info->type_index;
 737   ++info->type_index;
 738
 739   sprintf (buf, "%ld=r%ld;%u;0;", index, index, size);
 740
 741   return stab_push_string (info, buf, index, TRUE, size * 2);
 742 }
 743
 744 /* Push a bfd_boolean type.  We use an XCOFF predefined type, since gdb
 745    always recognizes them.  */
 746
 747 static bfd_boolean
 748 stab_bool_type (void *p, unsigned int size)
 749 {
 750   struct stab_write_handle *info = (struct stab_write_handle *) p;
 751   long index;
 752
 753   switch (size)
 754     {
 755     case 1:
 756       index = -21;
 757       break;
 758
 759     case 2:
 760       index = -22;
 761       break;
 762
 763     default:
 764     case 4:
 765       index = -16;
 766       break;
 767
 768     case 8:
 769       index = -33;
 770       break;
 771     }
 772
 773   return stab_push_defined_type (info, index, size);
 774 }
 775
 776 /* Push an enum type.  */
 777
 778 static bfd_boolean
 779 stab_enum_type (void *p, const char *tag, const char **names,
 780                 bfd_signed_vma *vals)
 781 {
 782   struct stab_write_handle *info = (struct stab_write_handle *) p;
 783   size_t len;
 784   const char **pn;
 785   char *buf;
 786   long index = 0;
 787   bfd_signed_vma *pv;
 788
 789   if (names == NULL)
 790     {
 791       assert (tag != NULL);
 792
 793       buf = (char *) xmalloc (10 + strlen (tag));
 794       sprintf (buf, "xe%s:", tag);
 795       /* FIXME: The size is just a guess.  */
 796       if (! stab_push_string (info, buf, 0, FALSE, 4))
 797         return FALSE;
 798       free (buf);
 799       return TRUE;
 800     }
 801
 802   len = 10;
 803   if (tag != NULL)
 804     len += strlen (tag);
 805   for (pn = names; *pn != NULL; pn++)
 806     len += strlen (*pn) + 20;
 807
 808   buf = (char *) xmalloc (len);
 809
 810   if (tag == NULL)
 811     strcpy (buf, "e");
 812   else
 813     {
 814       index = info->type_index;
 815       ++info->type_index;
 816       sprintf (buf, "%s:T%ld=e", tag, index);
 817     }
 818
 819   for (pn = names, pv = vals; *pn != NULL; pn++, pv++)
 820     sprintf (buf + strlen (buf), "%s:%ld,", *pn, (long) *pv);
 821   strcat (buf, ";");
 822
 823   if (tag == NULL)
 824     {
 825       /* FIXME: The size is just a guess.  */
 826       if (! stab_push_string (info, buf, 0, FALSE, 4))
 827         return FALSE;
 828     }
 829   else
 830     {
 831       /* FIXME: The size is just a guess.  */
 832       if (! stab_write_symbol (info, N_LSYM, 0, 0, buf)
 833           || ! stab_push_defined_type (info, index, 4))
 834         return FALSE;
 835     }
 836
 837   free (buf);
 838
 839   return TRUE;
 840 }
 841
 842 /* Push a modification of the top type on the stack.  Cache the
 843    results in CACHE and CACHE_ALLOC.  */
 844
 845 static bfd_boolean
 846 stab_modify_type (struct stab_write_handle *info, int mod,
 847                   unsigned int size, long **cache, size_t *cache_alloc)
 848 {
 849   long targindex;
 850   long index;
 851   char *s, *buf;
 852
 853   assert (info->type_stack != NULL);
 854   targindex = info->type_stack->index;
 855
 856   if (targindex <= 0
 857       || cache == NULL)
 858     {
 859       bfd_boolean definition;
 860
 861       /* Either the target type has no index, or we aren't caching
 862          this modifier.  Either way we have no way of recording the
 863          new type, so we don't bother to define one.  */
 864       definition = info->type_stack->definition;
 865       s = stab_pop_type (info);
 866       buf = (char *) xmalloc (strlen (s) + 2);
 867       sprintf (buf, "%c%s", mod, s);
 868       free (s);
 869       if (! stab_push_string (info, buf, 0, definition, size))
 870         return FALSE;
 871       free (buf);
 872     }
 873   else
 874     {
 875       if ((size_t) targindex >= *cache_alloc)
 876         {
 877           size_t alloc;
 878
 879           alloc = *cache_alloc;
 880           if (alloc == 0)
 881             alloc = 10;
 882           while ((size_t) targindex >= alloc)
 883             alloc *= 2;
 884           *cache = (long *) xrealloc (*cache, alloc * sizeof (long));
 885           memset (*cache + *cache_alloc, 0,
 886                   (alloc - *cache_alloc) * sizeof (long));
 887           *cache_alloc = alloc;
 888         }
 889
 890       index = (*cache)[targindex];
 891       if (index != 0 && ! info->type_stack->definition)
 892         {
 893           /* We have already defined a modification of this type, and
 894              the entry on the type stack is not a definition, so we
 895              can safely discard it (we may have a definition on the
 896              stack, even if we already defined a modification, if it
 897              is a struct which we did not define at the time it was
 898              referenced).  */
 899           free (stab_pop_type (info));
 900           if (! stab_push_defined_type (info, index, size))
 901             return FALSE;
 902         }
 903       else
 904         {
 905           index = info->type_index;
 906           ++info->type_index;
 907
 908           s = stab_pop_type (info);
 909           buf = (char *) xmalloc (strlen (s) + 20);
 910           sprintf (buf, "%ld=%c%s", index, mod, s);
 911           free (s);
 912
 913           (*cache)[targindex] = index;
 914
 915           if (! stab_push_string (info, buf, index, TRUE, size))
 916             return FALSE;
 917
 918           free (buf);
 919         }
 920     }
 921
 922   return TRUE;
 923 }
 924
 925 /* Push a pointer type.  */
 926
 927 static bfd_boolean
 928 stab_pointer_type (void *p)
 929 {
 930   struct stab_write_handle *info = (struct stab_write_handle *) p;
 931
 932   /* FIXME: The size should depend upon the architecture.  */
 933   return stab_modify_type (info, '*', 4, &info->type_cache.pointer_types,
 934                            &info->type_cache.pointer_types_alloc);
 935 }
 936
 937 /* Push a function type.  */
 938
 939 static bfd_boolean
 940 stab_function_type (void *p, int argcount,
 941                     bfd_boolean varargs ATTRIBUTE_UNUSED)
 942 {
 943   struct stab_write_handle *info = (struct stab_write_handle *) p;
 944   int i;
 945
 946   /* We have no way to represent the argument types, so we just
 947      discard them.  However, if they define new types, we must output
 948      them.  We do this by producing empty typedefs.  */
 949   for (i = 0; i < argcount; i++)
 950     {
 951       if (! info->type_stack->definition)
 952         free (stab_pop_type (info));
 953       else
 954         {
 955           char *s, *buf;
 956
 957           s = stab_pop_type (info);
 958
 959           buf = (char *) xmalloc (strlen (s) + 3);
 960           sprintf (buf, ":t%s", s);
 961           free (s);
 962
 963           if (! stab_write_symbol (info, N_LSYM, 0, 0, buf))
 964             return FALSE;
 965
 966           free (buf);
 967         }
 968     }
 969
 970   return stab_modify_type (info, 'f', 0, &info->type_cache.function_types,
 971                            &info->type_cache.function_types_alloc);
 972 }
 973
 974 /* Push a reference type.  */
 975
 976 static bfd_boolean
 977 stab_reference_type (void *p)
 978 {
 979   struct stab_write_handle *info = (struct stab_write_handle *) p;
 980
 981   /* FIXME: The size should depend upon the architecture.  */
 982   return stab_modify_type (info, '&', 4, &info->type_cache.reference_types,
 983                            &info->type_cache.reference_types_alloc);
 984 }
 985
 986 /* Push a range type.  */
 987
 988 static bfd_boolean
 989 stab_range_type (void *p, bfd_signed_vma low, bfd_signed_vma high)
 990 {
 991   struct stab_write_handle *info = (struct stab_write_handle *) p;
 992   bfd_boolean definition;
 993   unsigned int size;
 994   char *s, *buf;
 995
 996   definition = info->type_stack->definition;
 997   size = info->type_stack->size;
 998
 999   s = stab_pop_type (info);
1000   buf = (char *) xmalloc (strlen (s) + 100);
1001   sprintf (buf, "r%s;%ld;%ld;", s, (long) low, (long) high);
1002   free (s);
1003
1004   if (! stab_push_string (info, buf, 0, definition, size))
1005     return FALSE;
1006
1007   free (buf);
1008
1009   return TRUE;
1010 }
1011
1012 /* Push an array type.  */
1013
1014 static bfd_boolean
1015 stab_array_type (void *p, bfd_signed_vma low, bfd_signed_vma high,
1016                  bfd_boolean stringp)
1017 {
1018   struct stab_write_handle *info = (struct stab_write_handle *) p;
1019   bfd_boolean definition;
1020   unsigned int element_size;
1021   char *range, *element, *buf;
1022   long index;
1023   unsigned int size;
1024
1025   definition = info->type_stack->definition;
1026   range = stab_pop_type (info);
1027
1028   definition = definition || info->type_stack->definition;
1029   element_size = info->type_stack->size;
1030   element = stab_pop_type (info);
1031
1032   buf = (char *) xmalloc (strlen (range) + strlen (element) + 100);
1033
1034   if (! stringp)
1035     {
1036       index = 0;
1037       *buf = '\0';
1038     }
1039   else
1040     {
1041       /* We need to define a type in order to include the string
1042          attribute.  */
1043       index = info->type_index;
1044       ++info->type_index;
1045       definition = TRUE;
1046       sprintf (buf, "%ld=@S;", index);
1047     }
1048
1049   sprintf (buf + strlen (buf), "ar%s;%ld;%ld;%s",
1050            range, (long) low, (long) high, element);
1051   free (range);
1052   free (element);
1053
1054   if (high < low)
1055     size = 0;
1056   else
1057     size = element_size * ((high - low) + 1);
1058   if (! stab_push_string (info, buf, index, definition, size))
1059     return FALSE;
1060
1061   free (buf);
1062
1063   return TRUE;
1064 }
1065
1066 /* Push a set type.  */
1067
1068 static bfd_boolean
1069 stab_set_type (void *p, bfd_boolean bitstringp)
1070 {
1071   struct stab_write_handle *info = (struct stab_write_handle *) p;
1072   bfd_boolean definition;
1073   char *s, *buf;
1074   long index;
1075
1076   definition = info->type_stack->definition;
1077
1078   s = stab_pop_type (info);
1079   buf = (char *) xmalloc (strlen (s) + 30);
1080
1081   if (! bitstringp)
1082     {
1083       *buf = '\0';
1084       index = 0;
1085     }
1086   else
1087     {
1088       /* We need to define a type in order to include the string
1089          attribute.  */
1090       index = info->type_index;
1091       ++info->type_index;
1092       definition = TRUE;
1093       sprintf (buf, "%ld=@S;", index);
1094     }
1095
1096   sprintf (buf + strlen (buf), "S%s", s);
1097   free (s);
1098
1099   if (! stab_push_string (info, buf, index, definition, 0))
1100     return FALSE;
1101
1102   free (buf);
1103
1104   return TRUE;
1105 }
1106
1107 /* Push an offset type.  */
1108
1109 static bfd_boolean
1110 stab_offset_type (void *p)
1111 {
1112   struct stab_write_handle *info = (struct stab_write_handle *) p;
1113   bfd_boolean definition;
1114   char *target, *base, *buf;
1115
1116   definition = info->type_stack->definition;
1117   target = stab_pop_type (info);
1118
1119   definition = definition || info->type_stack->definition;
1120   base = stab_pop_type (info);
1121
1122   buf = (char *) xmalloc (strlen (target) + strlen (base) + 3);
1123   sprintf (buf, "@%s,%s", base, target);
1124   free (base);
1125   free (target);
1126
1127   if (! stab_push_string (info, buf, 0, definition, 0))
1128     return FALSE;
1129
1130   free (buf);
1131
1132   return TRUE;
1133 }
1134
1135 /* Push a method type.  */
1136
1137 static bfd_boolean
1138 stab_method_type (void *p, bfd_boolean domainp, int argcount,
1139                   bfd_boolean varargs)
1140 {
1141   struct stab_write_handle *info = (struct stab_write_handle *) p;
1142   bfd_boolean definition;
1143   char *domain, *return_type, *buf;
1144   char **args;
1145   int i;
1146   size_t len;
1147
1148   /* We don't bother with stub method types, because that would
1149      require a mangler for C++ argument types.  This will waste space
1150      in the debugging output.  */
1151
1152   /* We need a domain.  I'm not sure DOMAINP can ever be false,
1153      anyhow.  */
1154   if (! domainp)
1155     {
1156       if (! stab_empty_type (p))
1157         return FALSE;
1158     }
1159
1160   definition = info->type_stack->definition;
1161   domain = stab_pop_type (info);
1162
1163   /* A non-varargs function is indicated by making the last parameter
1164      type be void.  */
1165
1166   if (argcount < 0)
1167     {
1168       args = NULL;
1169       argcount = 0;
1170     }
1171   else if (argcount == 0)
1172     {
1173       if (varargs)
1174         args = NULL;
1175       else
1176         {
1177           args = (char **) xmalloc (1 * sizeof (*args));
1178           if (! stab_empty_type (p))
1179             return FALSE;
1180           definition = definition || info->type_stack->definition;
1181           args[0] = stab_pop_type (info);
1182           argcount = 1;
1183         }
1184     }
1185   else
1186     {
1187       args = (char **) xmalloc ((argcount + 1) * sizeof (*args));
1188       for (i = argcount - 1; i >= 0; i--)
1189         {
1190           definition = definition || info->type_stack->definition;
1191           args[i] = stab_pop_type (info);
1192         }
1193       if (! varargs)
1194         {
1195           if (! stab_empty_type (p))
1196             return FALSE;
1197           definition = definition || info->type_stack->definition;
1198           args[argcount] = stab_pop_type (info);
1199           ++argcount;
1200         }
1201     }
1202
1203   definition = definition || info->type_stack->definition;
1204   return_type = stab_pop_type (info);
1205
1206   len = strlen (domain) + strlen (return_type) + 10;
1207   for (i = 0; i < argcount; i++)
1208     len += strlen (args[i]);
1209
1210   buf = (char *) xmalloc (len);
1211
1212   sprintf (buf, "#%s,%s", domain, return_type);
1213   free (domain);
1214   free (return_type);
1215   for (i = 0; i < argcount; i++)
1216     {
1217       strcat (buf, ",");
1218       strcat (buf, args[i]);
1219       free (args[i]);
1220     }
1221   strcat (buf, ";");
1222
1223   if (args != NULL)
1224     free (args);
1225
1226   if (! stab_push_string (info, buf, 0, definition, 0))
1227     return FALSE;
1228
1229   free (buf);
1230
1231   return TRUE;
1232 }
1233
1234 /* Push a const version of a type.  */
1235
1236 static bfd_boolean
1237 stab_const_type (void *p)
1238 {
1239   struct stab_write_handle *info = (struct stab_write_handle *) p;
1240
1241   return stab_modify_type (info, 'k', info->type_stack->size,
1242                            (long **) NULL, (size_t *) NULL);
1243 }
1244
1245 /* Push a volatile version of a type.  */
1246
1247 static bfd_boolean
1248 stab_volatile_type (void *p)
1249 {
1250   struct stab_write_handle *info = (struct stab_write_handle *) p;
1251
1252   return stab_modify_type (info, 'B', info->type_stack->size,
1253                            (long **) NULL, (size_t *) NULL);
1254 }
1255
1256 /* Get the type index to use for a struct/union/class ID.  This should
1257    return -1 if it fails.  */
1258
1259 static long
1260 stab_get_struct_index (struct stab_write_handle *info, const char *tag,
1261                        unsigned int id, enum debug_type_kind kind,
1262                        unsigned int *psize)
1263 {
1264   if (id >= info->type_cache.struct_types_alloc)
1265     {
1266       size_t alloc;
1267
1268       alloc = info->type_cache.struct_types_alloc;
1269       if (alloc == 0)
1270         alloc = 10;
1271       while (id >= alloc)
1272         alloc *= 2;
1273       info->type_cache.struct_types =
1274         (struct stab_tag *) xrealloc (info->type_cache.struct_types,
1275                                       alloc * sizeof (struct stab_tag));
1276       memset ((info->type_cache.struct_types
1277                + info->type_cache.struct_types_alloc),
1278               0,
1279               ((alloc - info->type_cache.struct_types_alloc)
1280                * sizeof (struct stab_tag)));
1281       info->type_cache.struct_types_alloc = alloc;
1282     }
1283
1284   if (info->type_cache.struct_types[id].index == 0)
1285     {
1286       info->type_cache.struct_types[id].index = info->type_index;
1287       ++info->type_index;
1288       info->type_cache.struct_types[id].tag = tag;
1289       info->type_cache.struct_types[id].kind = kind;
1290     }
1291
1292   if (kind == DEBUG_KIND_ILLEGAL)
1293     {
1294       /* This is a definition of the struct.  */
1295       info->type_cache.struct_types[id].kind = kind;
1296       info->type_cache.struct_types[id].size = *psize;
1297     }
1298   else
1299     *psize = info->type_cache.struct_types[id].size;
1300
1301   return info->type_cache.struct_types[id].index;
1302 }
1303
1304 /* Start outputting a struct.  We ignore the tag, and handle it in
1305    stab_tag.  */
1306
1307 static bfd_boolean
1308 stab_start_struct_type (void *p, const char *tag, unsigned int id,
1309                         bfd_boolean structp, unsigned int size)
1310 {
1311   struct stab_write_handle *info = (struct stab_write_handle *) p;
1312   long index;
1313   bfd_boolean definition;
1314   char *buf;
1315
1316   buf = (char *) xmalloc (40);
1317
1318   if (id == 0)
1319     {
1320       index = 0;
1321       *buf = '\0';
1322       definition = FALSE;
1323     }
1324   else
1325     {
1326       index = stab_get_struct_index (info, tag, id, DEBUG_KIND_ILLEGAL,
1327                                      &size);
1328       if (index < 0)
1329         return FALSE;
1330       sprintf (buf, "%ld=", index);
1331       definition = TRUE;
1332     }
1333
1334   sprintf (buf + strlen (buf), "%c%u",
1335            structp ? 's' : 'u',
1336            size);
1337
1338   if (! stab_push_string (info, buf, index, definition, size))
1339     return FALSE;
1340
1341   info->type_stack->fields = (char *) xmalloc (1);
1342   info->type_stack->fields[0] = '\0';
1343
1344   return TRUE;
1345 }
1346
1347 /* Add a field to a struct.  */
1348
1349 static bfd_boolean
1350 stab_struct_field (void *p, const char *name, bfd_vma bitpos,
1351                    bfd_vma bitsize, enum debug_visibility visibility)
1352 {
1353   struct stab_write_handle *info = (struct stab_write_handle *) p;
1354   bfd_boolean definition;
1355   unsigned int size;
1356   char *s, *n;
1357   const char *vis;
1358
1359   definition = info->type_stack->definition;
1360   size = info->type_stack->size;
1361   s = stab_pop_type (info);
1362
1363   /* Add this field to the end of the current struct fields, which is
1364      currently on the top of the stack.  */
1365
1366   assert (info->type_stack->fields != NULL);
1367   n = (char *) xmalloc (strlen (info->type_stack->fields)
1368                         + strlen (name)
1369                         + strlen (s)
1370                         + 50);
1371
1372   switch (visibility)
1373     {
1374     default:
1375       abort ();
1376
1377     case DEBUG_VISIBILITY_PUBLIC:
1378       vis = "";
1379       break;
1380
1381     case DEBUG_VISIBILITY_PRIVATE:
1382       vis = "/0";
1383       break;
1384
1385     case DEBUG_VISIBILITY_PROTECTED:
1386       vis = "/1";
1387       break;
1388     }
1389
1390   if (bitsize == 0)
1391     {
1392       bitsize = size * 8;
1393       if (bitsize == 0)
1394         non_fatal (_("%s: warning: unknown size for field `%s' in struct"),
1395                    bfd_get_filename (info->abfd), name);
1396     }
1397
1398   sprintf (n, "%s%s:%s%s,%ld,%ld;", info->type_stack->fields, name, vis, s,
1399            (long) bitpos, (long) bitsize);
1400
1401   free (info->type_stack->fields);
1402   info->type_stack->fields = n;
1403
1404   if (definition)
1405     info->type_stack->definition = TRUE;
1406
1407   return TRUE;
1408 }
1409
1410 /* Finish up a struct.  */
1411
1412 static bfd_boolean
1413 stab_end_struct_type (void *p)
1414 {
1415   struct stab_write_handle *info = (struct stab_write_handle *) p;
1416   bfd_boolean definition;
1417   long index;
1418   unsigned int size;
1419   char *fields, *first, *buf;
1420
1421   assert (info->type_stack != NULL && info->type_stack->fields != NULL);
1422
1423   definition = info->type_stack->definition;
1424   index = info->type_stack->index;
1425   size = info->type_stack->size;
1426   fields = info->type_stack->fields;
1427   first = stab_pop_type (info);
1428
1429   buf = (char *) xmalloc (strlen (first) + strlen (fields) + 2);
1430   sprintf (buf, "%s%s;", first, fields);
1431   free (first);
1432   free (fields);
1433
1434   if (! stab_push_string (info, buf, index, definition, size))
1435     return FALSE;
1436
1437   free (buf);
1438
1439   return TRUE;
1440 }
1441
1442 /* Start outputting a class.  */
1443
1444 static bfd_boolean
1445 stab_start_class_type (void *p, const char *tag, unsigned int id, bfd_boolean structp, unsigned int size, bfd_boolean vptr, bfd_boolean ownvptr)
1446 {
1447   struct stab_write_handle *info = (struct stab_write_handle *) p;
1448   bfd_boolean definition;
1449   char *vstring;
1450
1451   if (! vptr || ownvptr)
1452     {
1453       definition = FALSE;
1454       vstring = NULL;
1455     }
1456   else
1457     {
1458       definition = info->type_stack->definition;
1459       vstring = stab_pop_type (info);
1460     }
1461
1462   if (! stab_start_struct_type (p, tag, id, structp, size))
1463     return FALSE;
1464
1465   if (vptr)
1466     {
1467       char *vtable;
1468
1469       if (ownvptr)
1470         {
1471           assert (info->type_stack->index > 0);
1472           vtable = (char *) xmalloc (20);
1473           sprintf (vtable, "~%%%ld", info->type_stack->index);
1474         }
1475       else
1476         {
1477           vtable = (char *) xmalloc (strlen (vstring) + 3);
1478           sprintf (vtable, "~%%%s", vstring);
1479           free (vstring);
1480         }
1481
1482       info->type_stack->vtable = vtable;
1483     }
1484
1485   if (definition)
1486     info->type_stack->definition = TRUE;
1487
1488   return TRUE;
1489 }
1490
1491 /* Add a static member to the class on the type stack.  */
1492
1493 static bfd_boolean
1494 stab_class_static_member (void *p, const char *name, const char *physname,
1495                           enum debug_visibility visibility)
1496 {
1497   struct stab_write_handle *info = (struct stab_write_handle *) p;
1498   bfd_boolean definition;
1499   char *s, *n;
1500   const char *vis;
1501
1502   definition = info->type_stack->definition;
1503   s = stab_pop_type (info);
1504
1505   /* Add this field to the end of the current struct fields, which is
1506      currently on the top of the stack.  */
1507
1508   assert (info->type_stack->fields != NULL);
1509   n = (char *) xmalloc (strlen (info->type_stack->fields)
1510                         + strlen (name)
1511                         + strlen (s)
1512                         + strlen (physname)
1513                         + 10);
1514
1515   switch (visibility)
1516     {
1517     default:
1518       abort ();
1519
1520     case DEBUG_VISIBILITY_PUBLIC:
1521       vis = "";
1522       break;
1523
1524     case DEBUG_VISIBILITY_PRIVATE:
1525       vis = "/0";
1526       break;
1527
1528     case DEBUG_VISIBILITY_PROTECTED:
1529       vis = "/1";
1530       break;
1531     }
1532
1533   sprintf (n, "%s%s:%s%s:%s;", info->type_stack->fields, name, vis, s,
1534            physname);
1535
1536   free (info->type_stack->fields);
1537   info->type_stack->fields = n;
1538
1539   if (definition)
1540     info->type_stack->definition = TRUE;
1541
1542   return TRUE;
1543 }
1544
1545 /* Add a base class to the class on the type stack.  */
1546
1547 static bfd_boolean
1548 stab_class_baseclass (void *p, bfd_vma bitpos, bfd_boolean virtual,
1549                       enum debug_visibility visibility)
1550 {
1551   struct stab_write_handle *info = (struct stab_write_handle *) p;
1552   bfd_boolean definition;
1553   char *s;
1554   char *buf;
1555   unsigned int c;
1556   char **baseclasses;
1557
1558   definition = info->type_stack->definition;
1559   s = stab_pop_type (info);
1560
1561   /* Build the base class specifier.  */
1562
1563   buf = (char *) xmalloc (strlen (s) + 25);
1564   buf[0] = virtual ? '1' : '0';
1565   switch (visibility)
1566     {
1567     default:
1568       abort ();
1569
1570     case DEBUG_VISIBILITY_PRIVATE:
1571       buf[1] = '0';
1572       break;
1573
1574     case DEBUG_VISIBILITY_PROTECTED:
1575       buf[1] = '1';
1576       break;
1577
1578     case DEBUG_VISIBILITY_PUBLIC:
1579       buf[1] = '2';
1580       break;
1581     }
1582
1583   sprintf (buf + 2, "%ld,%s;", (long) bitpos, s);
1584   free (s);
1585
1586   /* Add the new baseclass to the existing ones.  */
1587
1588   assert (info->type_stack != NULL && info->type_stack->fields != NULL);
1589
1590   if (info->type_stack->baseclasses == NULL)
1591     c = 0;
1592   else
1593     {
1594       c = 0;
1595       while (info->type_stack->baseclasses[c] != NULL)
1596         ++c;
1597     }
1598
1599   baseclasses = (char **) xrealloc (info->type_stack->baseclasses,
1600                                     (c + 2) * sizeof (*baseclasses));
1601   baseclasses[c] = buf;
1602   baseclasses[c + 1] = NULL;
1603
1604   info->type_stack->baseclasses = baseclasses;
1605
1606   if (definition)
1607     info->type_stack->definition = TRUE;
1608
1609   return TRUE;
1610 }
1611
1612 /* Start adding a method to the class on the type stack.  */
1613
1614 static bfd_boolean
1615 stab_class_start_method (void *p, const char *name)
1616 {
1617   struct stab_write_handle *info = (struct stab_write_handle *) p;
1618   char *m;
1619
1620   assert (info->type_stack != NULL && info->type_stack->fields != NULL);
1621
1622   if (info->type_stack->methods == NULL)
1623     {
1624       m = (char *) xmalloc (strlen (name) + 3);
1625       *m = '\0';
1626     }
1627   else
1628     {
1629       m = (char *) xrealloc (info->type_stack->methods,
1630                              (strlen (info->type_stack->methods)
1631                               + strlen (name)
1632                               + 4));
1633     }
1634
1635   sprintf (m + strlen (m), "%s::", name);
1636
1637   info->type_stack->methods = m;
1638
1639   return TRUE;
1640 }
1641
1642 /* Add a variant, either static or not, to the current method.  */
1643
1644 static bfd_boolean
1645 stab_class_method_var (struct stab_write_handle *info, const char *physname,
1646                        enum debug_visibility visibility,
1647                        bfd_boolean staticp, bfd_boolean constp,
1648                        bfd_boolean volatilep, bfd_vma voffset,
1649                        bfd_boolean contextp)
1650 {
1651   bfd_boolean definition;
1652   char *type;
1653   char *context = NULL;
1654   char visc, qualc, typec;
1655
1656   definition = info->type_stack->definition;
1657   type = stab_pop_type (info);
1658
1659   if (contextp)
1660     {
1661       definition = definition || info->type_stack->definition;
1662       context = stab_pop_type (info);
1663     }
1664
1665   assert (info->type_stack != NULL && info->type_stack->methods != NULL);
1666
1667   switch (visibility)
1668     {
1669     default:
1670       abort ();
1671
1672     case DEBUG_VISIBILITY_PRIVATE:
1673       visc = '0';
1674       break;
1675
1676     case DEBUG_VISIBILITY_PROTECTED:
1677       visc = '1';
1678       break;
1679
1680     case DEBUG_VISIBILITY_PUBLIC:
1681       visc = '2';
1682       break;
1683     }
1684
1685   if (constp)
1686     {
1687       if (volatilep)
1688         qualc = 'D';
1689       else
1690         qualc = 'B';
1691     }
1692   else
1693     {
1694       if (volatilep)
1695         qualc = 'C';
1696       else
1697         qualc = 'A';
1698     }
1699
1700   if (staticp)
1701     typec = '?';
1702   else if (! contextp)
1703     typec = '.';
1704   else
1705     typec = '*';
1706
1707   info->type_stack->methods =
1708     (char *) xrealloc (info->type_stack->methods,
1709                        (strlen (info->type_stack->methods)
1710                         + strlen (type)
1711                         + strlen (physname)
1712                         + (contextp ? strlen (context) : 0)
1713                         + 40));
1714
1715   sprintf (info->type_stack->methods + strlen (info->type_stack->methods),
1716            "%s:%s;%c%c%c", type, physname, visc, qualc, typec);
1717   free (type);
1718
1719   if (contextp)
1720     {
1721       sprintf (info->type_stack->methods + strlen (info->type_stack->methods),
1722                "%ld;%s;", (long) voffset, context);
1723       free (context);
1724     }
1725
1726   if (definition)
1727     info->type_stack->definition = TRUE;
1728
1729   return TRUE;
1730 }
1731
1732 /* Add a variant to the current method.  */
1733
1734 static bfd_boolean
1735 stab_class_method_variant (void *p, const char *physname,
1736                            enum debug_visibility visibility,
1737                            bfd_boolean constp, bfd_boolean volatilep,
1738                            bfd_vma voffset, bfd_boolean contextp)
1739 {
1740   struct stab_write_handle *info = (struct stab_write_handle *) p;
1741
1742   return stab_class_method_var (info, physname, visibility, FALSE, constp,
1743                                 volatilep, voffset, contextp);
1744 }
1745
1746 /* Add a static variant to the current method.  */
1747
1748 static bfd_boolean
1749 stab_class_static_method_variant (void *p, const char *physname,
1750                                   enum debug_visibility visibility,
1751                                   bfd_boolean constp, bfd_boolean volatilep)
1752 {
1753   struct stab_write_handle *info = (struct stab_write_handle *) p;
1754
1755   return stab_class_method_var (info, physname, visibility, TRUE, constp,
1756                                 volatilep, 0, FALSE);
1757 }
1758
1759 /* Finish up a method.  */
1760
1761 static bfd_boolean
1762 stab_class_end_method (void *p)
1763 {
1764   struct stab_write_handle *info = (struct stab_write_handle *) p;
1765
1766   assert (info->type_stack != NULL && info->type_stack->methods != NULL);
1767
1768   /* We allocated enough room on info->type_stack->methods to add the
1769      trailing semicolon.  */
1770   strcat (info->type_stack->methods, ";");
1771
1772   return TRUE;
1773 }
1774
1775 /* Finish up a class.  */
1776
1777 static bfd_boolean
1778 stab_end_class_type (void *p)
1779 {
1780   struct stab_write_handle *info = (struct stab_write_handle *) p;
1781   size_t len;
1782   unsigned int i = 0;
1783   char *buf;
1784
1785   assert (info->type_stack != NULL && info->type_stack->fields != NULL);
1786
1787   /* Work out the size we need to allocate for the class definition.  */
1788
1789   len = (strlen (info->type_stack->string)
1790          + strlen (info->type_stack->fields)
1791          + 10);
1792   if (info->type_stack->baseclasses != NULL)
1793     {
1794       len += 20;
1795       for (i = 0; info->type_stack->baseclasses[i] != NULL; i++)
1796         len += strlen (info->type_stack->baseclasses[i]);
1797     }
1798   if (info->type_stack->methods != NULL)
1799     len += strlen (info->type_stack->methods);
1800   if (info->type_stack->vtable != NULL)
1801     len += strlen (info->type_stack->vtable);
1802
1803   /* Build the class definition.  */
1804
1805   buf = (char *) xmalloc (len);
1806
1807   strcpy (buf, info->type_stack->string);
1808
1809   if (info->type_stack->baseclasses != NULL)
1810     {
1811       sprintf (buf + strlen (buf), "!%u,", i);
1812       for (i = 0; info->type_stack->baseclasses[i] != NULL; i++)
1813         {
1814           strcat (buf, info->type_stack->baseclasses[i]);
1815           free (info->type_stack->baseclasses[i]);
1816         }
1817       free (info->type_stack->baseclasses);
1818       info->type_stack->baseclasses = NULL;
1819     }
1820
1821   strcat (buf, info->type_stack->fields);
1822   free (info->type_stack->fields);
1823   info->type_stack->fields = NULL;
1824
1825   if (info->type_stack->methods != NULL)
1826     {
1827       strcat (buf, info->type_stack->methods);
1828       free (info->type_stack->methods);
1829       info->type_stack->methods = NULL;
1830     }
1831
1832   strcat (buf, ";");
1833
1834   if (info->type_stack->vtable != NULL)
1835     {
1836       strcat (buf, info->type_stack->vtable);
1837       free (info->type_stack->vtable);
1838       info->type_stack->vtable = NULL;
1839     }
1840
1841   /* Replace the string on the top of the stack with the complete
1842      class definition.  */
1843   free (info->type_stack->string);
1844   info->type_stack->string = buf;
1845
1846   return TRUE;
1847 }
1848
1849 /* Push a typedef which was previously defined.  */
1850
1851 static bfd_boolean
1852 stab_typedef_type (void *p, const char *name)
1853 {
1854   struct stab_write_handle *info = (struct stab_write_handle *) p;
1855   struct string_hash_entry *h;
1856
1857   h = string_hash_lookup (&info->typedef_hash, name, FALSE, FALSE);
1858   assert (h != NULL && h->index > 0);
1859
1860   return stab_push_defined_type (info, h->index, h->size);
1861 }
1862
1863 /* Push a struct, union or class tag.  */
1864
1865 static bfd_boolean
1866 stab_tag_type (void *p, const char *name, unsigned int id,
1867                enum debug_type_kind kind)
1868 {
1869   struct stab_write_handle *info = (struct stab_write_handle *) p;
1870   long index;
1871   unsigned int size = 0;
1872
1873   index = stab_get_struct_index (info, name, id, kind, &size);
1874   if (index < 0)
1875     return FALSE;
1876
1877   return stab_push_defined_type (info, index, size);
1878 }
1879
1880 /* Define a typedef.  */
1881
1882 static bfd_boolean
1883 stab_typdef (void *p, const char *name)
1884 {
1885   struct stab_write_handle *info = (struct stab_write_handle *) p;
1886   long index;
1887   unsigned int size;
1888   char *s, *buf;
1889   struct string_hash_entry *h;
1890
1891   index = info->type_stack->index;
1892   size = info->type_stack->size;
1893   s = stab_pop_type (info);
1894
1895   buf = (char *) xmalloc (strlen (name) + strlen (s) + 20);
1896
1897   if (index > 0)
1898     sprintf (buf, "%s:t%s", name, s);
1899   else
1900     {
1901       index = info->type_index;
1902       ++info->type_index;
1903       sprintf (buf, "%s:t%ld=%s", name, index, s);
1904     }
1905
1906   free (s);
1907
1908   if (! stab_write_symbol (info, N_LSYM, 0, 0, buf))
1909     return FALSE;
1910
1911   free (buf);
1912
1913   h = string_hash_lookup (&info->typedef_hash, name, TRUE, FALSE);
1914   if (h == NULL)
1915     {
1916       non_fatal (_("string_hash_lookup failed: %s"),
1917                  bfd_errmsg (bfd_get_error ()));
1918       return FALSE;
1919     }
1920
1921   /* I don't think we care about redefinitions.  */
1922
1923   h->index = index;
1924   h->size = size;
1925
1926   return TRUE;
1927 }
1928
1929 /* Define a tag.  */
1930
1931 static bfd_boolean
1932 stab_tag (void *p, const char *tag)
1933 {
1934   struct stab_write_handle *info = (struct stab_write_handle *) p;
1935   char *s, *buf;
1936
1937   s = stab_pop_type (info);
1938
1939   buf = (char *) xmalloc (strlen (tag) + strlen (s) + 3);
1940
1941   sprintf (buf, "%s:T%s", tag, s);
1942   free (s);
1943
1944   if (! stab_write_symbol (info, N_LSYM, 0, 0, buf))
1945     return FALSE;
1946
1947   free (buf);
1948
1949   return TRUE;
1950 }
1951
1952 /* Define an integer constant.  */
1953
1954 static bfd_boolean
1955 stab_int_constant (void *p, const char *name, bfd_vma val)
1956 {
1957   struct stab_write_handle *info = (struct stab_write_handle *) p;
1958   char *buf;
1959
1960   buf = (char *) xmalloc (strlen (name) + 20);
1961   sprintf (buf, "%s:c=i%ld", name, (long) val);
1962
1963   if (! stab_write_symbol (info, N_LSYM, 0, 0, buf))
1964     return FALSE;
1965
1966   free (buf);
1967
1968   return TRUE;
1969 }
1970
1971 /* Define a floating point constant.  */
1972
1973 static bfd_boolean
1974 stab_float_constant (void *p, const char *name, double val)
1975 {
1976   struct stab_write_handle *info = (struct stab_write_handle *) p;
1977   char *buf;
1978
1979   buf = (char *) xmalloc (strlen (name) + 20);
1980   sprintf (buf, "%s:c=f%g", name, val);
1981
1982   if (! stab_write_symbol (info, N_LSYM, 0, 0, buf))
1983     return FALSE;
1984
1985   free (buf);
1986
1987   return TRUE;
1988 }
1989
1990 /* Define a typed constant.  */
1991
1992 static bfd_boolean
1993 stab_typed_constant (void *p, const char *name, bfd_vma val)
1994 {
1995   struct stab_write_handle *info = (struct stab_write_handle *) p;
1996   char *s, *buf;
1997
1998   s = stab_pop_type (info);
1999
2000   buf = (char *) xmalloc (strlen (name) + strlen (s) + 20);
2001   sprintf (buf, "%s:c=e%s,%ld", name, s, (long) val);
2002   free (s);
2003
2004   if (! stab_write_symbol (info, N_LSYM, 0, 0, buf))
2005     return FALSE;
2006
2007   free (buf);
2008
2009   return TRUE;
2010 }
2011
2012 /* Record a variable.  */
2013
2014 static bfd_boolean
2015 stab_variable (void *p, const char *name, enum debug_var_kind kind,
2016                bfd_vma val)
2017 {
2018   struct stab_write_handle *info = (struct stab_write_handle *) p;
2019   char *s, *buf;
2020   int stab_type;
2021   const char *kindstr;
2022
2023   s = stab_pop_type (info);
2024
2025   switch (kind)
2026     {
2027     default:
2028       abort ();
2029
2030     case DEBUG_GLOBAL:
2031       stab_type = N_GSYM;
2032       kindstr = "G";
2033       break;
2034
2035     case DEBUG_STATIC:
2036       stab_type = N_STSYM;
2037       kindstr = "S";
2038       break;
2039
2040     case DEBUG_LOCAL_STATIC:
2041       stab_type = N_STSYM;
2042       kindstr = "V";
2043       break;
2044
2045     case DEBUG_LOCAL:
2046       stab_type = N_LSYM;
2047       kindstr = "";
2048
2049       /* Make sure that this is a type reference or definition.  */
2050       if (! ISDIGIT (*s))
2051         {
2052           char *n;
2053           long index;
2054
2055           index = info->type_index;
2056           ++info->type_index;
2057           n = (char *) xmalloc (strlen (s) + 20);
2058           sprintf (n, "%ld=%s", index, s);
2059           free (s);
2060           s = n;
2061         }
2062       break;
2063
2064     case DEBUG_REGISTER:
2065       stab_type = N_RSYM;
2066       kindstr = "r";
2067       break;
2068     }
2069
2070   buf = (char *) xmalloc (strlen (name) + strlen (s) + 3);
2071   sprintf (buf, "%s:%s%s", name, kindstr, s);
2072   free (s);
2073
2074   if (! stab_write_symbol (info, stab_type, 0, val, buf))
2075     return FALSE;
2076
2077   free (buf);
2078
2079   return TRUE;
2080 }
2081
2082 /* Start outputting a function.  */
2083
2084 static bfd_boolean
2085 stab_start_function (void *p, const char *name, bfd_boolean globalp)
2086 {
2087   struct stab_write_handle *info = (struct stab_write_handle *) p;
2088   char *rettype, *buf;
2089
2090   assert (info->nesting == 0 && info->fun_offset == -1);
2091
2092   rettype = stab_pop_type (info);
2093
2094   buf = (char *) xmalloc (strlen (name) + strlen (rettype) + 3);
2095   sprintf (buf, "%s:%c%s", name,
2096            globalp ? 'F' : 'f',
2097            rettype);
2098
2099   /* We don't know the value now, so we set it in start_block.  */
2100   info->fun_offset = info->symbols_size;
2101
2102   if (! stab_write_symbol (info, N_FUN, 0, 0, buf))
2103     return FALSE;
2104
2105   free (buf);
2106
2107   return TRUE;
2108 }
2109
2110 /* Output a function parameter.  */
2111
2112 static bfd_boolean
2113 stab_function_parameter (void *p, const char *name, enum debug_parm_kind kind, bfd_vma val)
2114 {
2115   struct stab_write_handle *info = (struct stab_write_handle *) p;
2116   char *s, *buf;
2117   int stab_type;
2118   char kindc;
2119
2120   s = stab_pop_type (info);
2121
2122   switch (kind)
2123     {
2124     default:
2125       abort ();
2126
2127     case DEBUG_PARM_STACK:
2128       stab_type = N_PSYM;
2129       kindc = 'p';
2130       break;
2131
2132     case DEBUG_PARM_REG:
2133       stab_type = N_RSYM;
2134       kindc = 'P';
2135       break;
2136
2137     case DEBUG_PARM_REFERENCE:
2138       stab_type = N_PSYM;
2139       kindc = 'v';
2140       break;
2141
2142     case DEBUG_PARM_REF_REG:
2143       stab_type = N_RSYM;
2144       kindc = 'a';
2145       break;
2146     }
2147
2148   buf = (char *) xmalloc (strlen (name) + strlen (s) + 3);
2149   sprintf (buf, "%s:%c%s", name, kindc, s);
2150   free (s);
2151
2152   if (! stab_write_symbol (info, stab_type, 0, val, buf))
2153     return FALSE;
2154
2155   free (buf);
2156
2157   return TRUE;
2158 }
2159
2160 /* Start a block.  */
2161
2162 static bfd_boolean
2163 stab_start_block (void *p, bfd_vma addr)
2164 {
2165   struct stab_write_handle *info = (struct stab_write_handle *) p;
2166
2167   /* Fill in any slots which have been waiting for the first known
2168      text address.  */
2169
2170   if (info->so_offset != -1)
2171     {
2172       bfd_put_32 (info->abfd, addr, info->symbols + info->so_offset + 8);
2173       info->so_offset = -1;
2174     }
2175
2176   if (info->fun_offset != -1)
2177     {
2178       bfd_put_32 (info->abfd, addr, info->symbols + info->fun_offset + 8);
2179       info->fun_offset = -1;
2180     }
2181
2182   ++info->nesting;
2183
2184   /* We will be called with a top level block surrounding the
2185      function, but stabs information does not output that block, so we
2186      ignore it.  */
2187
2188   if (info->nesting == 1)
2189     {
2190       info->fnaddr = addr;
2191       return TRUE;
2192     }
2193
2194   /* We have to output the LBRAC symbol after any variables which are
2195      declared inside the block.  We postpone the LBRAC until the next
2196      start_block or end_block.  */
2197
2198   /* If we have postponed an LBRAC, output it now.  */
2199   if (info->pending_lbrac != (bfd_vma) -1)
2200     {
2201       if (! stab_write_symbol (info, N_LBRAC, 0, info->pending_lbrac,
2202                                (const char *) NULL))
2203         return FALSE;
2204     }
2205
2206   /* Remember the address and output it later.  */
2207
2208   info->pending_lbrac = addr - info->fnaddr;
2209
2210   return TRUE;
2211 }
2212
2213 /* End a block.  */
2214
2215 static bfd_boolean
2216 stab_end_block (void *p, bfd_vma addr)
2217 {
2218   struct stab_write_handle *info = (struct stab_write_handle *) p;
2219
2220   if (addr > info->last_text_address)
2221     info->last_text_address = addr;
2222
2223   /* If we have postponed an LBRAC, output it now.  */
2224   if (info->pending_lbrac != (bfd_vma) -1)
2225     {
2226       if (! stab_write_symbol (info, N_LBRAC, 0, info->pending_lbrac,
2227                                (const char *) NULL))
2228         return FALSE;
2229       info->pending_lbrac = (bfd_vma) -1;
2230     }
2231
2232   assert (info->nesting > 0);
2233
2234   --info->nesting;
2235
2236   /* We ignore the outermost block.  */
2237   if (info->nesting == 0)
2238     return TRUE;
2239
2240   return stab_write_symbol (info, N_RBRAC, 0, addr - info->fnaddr,
2241                             (const char *) NULL);
2242 }
2243
2244 /* End a function.  */
2245
2246 static bfd_boolean
2247 stab_end_function (void *p ATTRIBUTE_UNUSED)
2248 {
2249   return TRUE;
2250 }
2251
2252 /* Output a line number.  */
2253
2254 static bfd_boolean
2255 stab_lineno (void *p, const char *file, unsigned long lineno, bfd_vma addr)
2256 {
2257   struct stab_write_handle *info = (struct stab_write_handle *) p;
2258
2259   assert (info->lineno_filename != NULL);
2260
2261   if (addr > info->last_text_address)
2262     info->last_text_address = addr;
2263
2264   if (strcmp (file, info->lineno_filename) != 0)
2265     {
2266       if (! stab_write_symbol (info, N_SOL, 0, addr, file))
2267         return FALSE;
2268       info->lineno_filename = file;
2269     }
2270
2271   return stab_write_symbol (info, N_SLINE, lineno, addr - info->fnaddr,
2272                             (const char *) NULL);
2273 }