1 /* Read coff symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
3 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009,
4 2010 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
26 #include "breakpoint.h"
29 #include "gdb_obstack.h"
31 #include "gdb_string.h"
34 #include "coff/internal.h" /* Internal format of COFF symbols in BFD */
35 #include "libcoff.h" /* FIXME secret internal data from BFD */
38 #include "gdb-stabs.h"
39 #include "stabsread.h"
40 #include "complaints.h"
42 #include "gdb_assert.h"
44 #include "dictionary.h"
46 #include "coff-pe-read.h"
50 extern void _initialize_coffread (void);
52 struct coff_symfile_info
54 file_ptr min_lineno_offset; /* Where in file lowest line#s are. */
55 file_ptr max_lineno_offset; /* 1+last byte of line#s in file. */
57 CORE_ADDR textaddr; /* Addr of .text section. */
58 unsigned int textsize; /* Size of .text section. */
59 struct stab_section_list *stabsects; /* .stab sections. */
60 asection *stabstrsect; /* Section pointer for .stab section. */
64 /* Translate an external name string into a user-visible name. */
65 #define EXTERNAL_NAME(string, abfd) \
66 (string[0] == bfd_get_symbol_leading_char (abfd) \
67 ? string + 1 : string)
69 /* To be an sdb debug type, type must have at least a basic or primary
70 derived type. Using this rather than checking against T_NULL is
71 said to prevent core dumps if we try to operate on Michael Bloom
74 #define SDB_TYPE(type) (BTYPE(type) | (type & N_TMASK))
76 /* Core address of start and end of text of current source file.
77 This comes from a ".text" symbol where x_nlinno > 0. */
79 static CORE_ADDR current_source_start_addr;
80 static CORE_ADDR current_source_end_addr;
82 /* The addresses of the symbol table stream and number of symbols
83 of the object file we are reading (as copied into core). */
85 static bfd *nlist_bfd_global;
86 static int nlist_nsyms_global;
89 /* Pointers to scratch storage, used for reading raw symbols and
92 static char *temp_sym;
93 static char *temp_aux;
95 /* Local variables that hold the shift and mask values for the
96 COFF file that we are currently reading. These come back to us
97 from BFD, and are referenced by their macro names, as well as
98 internally to the BTYPE, ISPTR, ISFCN, ISARY, ISTAG, and DECREF
99 macros from include/coff/internal.h . */
101 static unsigned local_n_btmask;
102 static unsigned local_n_btshft;
103 static unsigned local_n_tmask;
104 static unsigned local_n_tshift;
106 #define N_BTMASK local_n_btmask
107 #define N_BTSHFT local_n_btshft
108 #define N_TMASK local_n_tmask
109 #define N_TSHIFT local_n_tshift
111 /* Local variables that hold the sizes in the file of various COFF
112 structures. (We only need to know this to read them from the file
113 -- BFD will then translate the data in them, into `internal_xxx'
114 structs in the right byte order, alignment, etc.) */
116 static unsigned local_linesz;
117 static unsigned local_symesz;
118 static unsigned local_auxesz;
120 /* This is set if this is a PE format file. */
124 /* Chain of typedefs of pointers to empty struct/union types.
125 They are chained thru the SYMBOL_VALUE_CHAIN. */
127 static struct symbol *opaque_type_chain[HASHSIZE];
129 /* Simplified internal version of coff symbol table information. */
134 int c_symnum; /* Symbol number of this entry. */
135 int c_naux; /* 0 if syment only, 1 if syment +
143 extern void stabsread_clear_cache (void);
145 static struct type *coff_read_struct_type (int, int, int,
148 static struct type *decode_base_type (struct coff_symbol *,
150 union internal_auxent *,
153 static struct type *decode_type (struct coff_symbol *, unsigned int,
154 union internal_auxent *,
157 static struct type *decode_function_type (struct coff_symbol *,
159 union internal_auxent *,
162 static struct type *coff_read_enum_type (int, int, int,
165 static struct symbol *process_coff_symbol (struct coff_symbol *,
166 union internal_auxent *,
169 static void patch_opaque_types (struct symtab *);
171 static void enter_linenos (long, int, int, struct objfile *);
173 static void free_linetab (void);
175 static void free_linetab_cleanup (void *ignore);
177 static int init_lineno (bfd *, long, int);
179 static char *getsymname (struct internal_syment *);
181 static char *coff_getfilename (union internal_auxent *);
183 static void free_stringtab (void);
185 static void free_stringtab_cleanup (void *ignore);
187 static int init_stringtab (bfd *, long);
189 static void read_one_sym (struct coff_symbol *,
190 struct internal_syment *,
191 union internal_auxent *);
193 static void coff_symtab_read (long, unsigned int, struct objfile *);
195 /* We are called once per section from coff_symfile_read. We
196 need to examine each section we are passed, check to see
197 if it is something we are interested in processing, and
198 if so, stash away some access information for the section.
200 FIXME: The section names should not be hardwired strings (what
201 should they be? I don't think most object file formats have enough
202 section flags to specify what kind of debug section it is
206 coff_locate_sections (bfd *abfd, asection *sectp, void *csip)
208 struct coff_symfile_info *csi;
211 csi = (struct coff_symfile_info *) csip;
212 name = bfd_get_section_name (abfd, sectp);
213 if (strcmp (name, ".text") == 0)
215 csi->textaddr = bfd_section_vma (abfd, sectp);
216 csi->textsize += bfd_section_size (abfd, sectp);
218 else if (strncmp (name, ".text", sizeof ".text" - 1) == 0)
220 csi->textsize += bfd_section_size (abfd, sectp);
222 else if (strcmp (name, ".stabstr") == 0)
224 csi->stabstrsect = sectp;
226 else if (strncmp (name, ".stab", sizeof ".stab" - 1) == 0)
230 /* We can have multiple .stab sections if linked with
232 for (s = name + sizeof ".stab" - 1; *s != '\0'; s++)
237 struct stab_section_list *n, **pn;
239 n = ((struct stab_section_list *)
240 xmalloc (sizeof (struct stab_section_list)));
243 for (pn = &csi->stabsects; *pn != NULL; pn = &(*pn)->next)
247 /* This will be run after coffstab_build_psymtabs is called
248 in coff_symfile_read, at which point we no longer need
250 make_cleanup (xfree, n);
255 /* Return the section_offsets* that CS points to. */
256 static int cs_to_section (struct coff_symbol *, struct objfile *);
258 struct find_targ_sec_arg
265 find_targ_sec (bfd *abfd, asection *sect, void *obj)
267 struct find_targ_sec_arg *args = (struct find_targ_sec_arg *) obj;
269 if (sect->target_index == args->targ_index)
270 *args->resultp = sect;
273 /* Return the bfd_section that CS points to. */
274 static struct bfd_section*
275 cs_to_bfd_section (struct coff_symbol *cs, struct objfile *objfile)
277 asection *sect = NULL;
278 struct find_targ_sec_arg args;
280 args.targ_index = cs->c_secnum;
281 args.resultp = §
282 bfd_map_over_sections (objfile->obfd, find_targ_sec, &args);
286 /* Return the section number (SECT_OFF_*) that CS points to. */
288 cs_to_section (struct coff_symbol *cs, struct objfile *objfile)
290 asection *sect = cs_to_bfd_section (cs, objfile);
293 return SECT_OFF_TEXT (objfile);
297 /* Return the address of the section of a COFF symbol. */
299 static CORE_ADDR cs_section_address (struct coff_symbol *, bfd *);
302 cs_section_address (struct coff_symbol *cs, bfd *abfd)
304 asection *sect = NULL;
305 struct find_targ_sec_arg args;
308 args.targ_index = cs->c_secnum;
309 args.resultp = §
310 bfd_map_over_sections (abfd, find_targ_sec, &args);
312 addr = bfd_get_section_vma (objfile->obfd, sect);
316 /* Look up a coff type-number index. Return the address of the slot
317 where the type for that index is stored.
318 The type-number is in INDEX.
320 This can be used for finding the type associated with that index
321 or for associating a new type with the index. */
323 static struct type **
324 coff_lookup_type (int index)
326 if (index >= type_vector_length)
328 int old_vector_length = type_vector_length;
330 type_vector_length *= 2;
331 if (index /* is still */ >= type_vector_length)
332 type_vector_length = index * 2;
334 type_vector = (struct type **)
335 xrealloc ((char *) type_vector,
336 type_vector_length * sizeof (struct type *));
337 memset (&type_vector[old_vector_length], 0,
338 (type_vector_length - old_vector_length) * sizeof (struct type *));
340 return &type_vector[index];
343 /* Make sure there is a type allocated for type number index
344 and return the type object.
345 This can create an empty (zeroed) type object. */
348 coff_alloc_type (int index)
350 struct type **type_addr = coff_lookup_type (index);
351 struct type *type = *type_addr;
353 /* If we are referring to a type not known at all yet,
354 allocate an empty type for it.
355 We will fill it in later if we find out how. */
358 type = alloc_type (current_objfile);
364 /* Start a new symtab for a new source file.
365 This is called when a COFF ".file" symbol is seen;
366 it indicates the start of data for one original source file. */
369 coff_start_symtab (char *name)
372 /* We fill in the filename later. start_symtab puts this pointer
373 into last_source_file and we put it in subfiles->name, which
374 end_symtab frees; that's why it must be malloc'd. */
376 /* We never know the directory name for COFF. */
378 /* The start address is irrelevant, since we set
379 last_source_start_addr in coff_end_symtab. */
381 record_debugformat ("COFF");
384 /* Save the vital information from when starting to read a file,
385 for use when closing off the current file.
386 NAME is the file name the symbols came from, START_ADDR is the
387 first text address for the file, and SIZE is the number of bytes of
391 complete_symtab (char *name, CORE_ADDR start_addr, unsigned int size)
393 if (last_source_file != NULL)
394 xfree (last_source_file);
395 last_source_file = xstrdup (name);
396 current_source_start_addr = start_addr;
397 current_source_end_addr = start_addr + size;
400 /* Finish the symbol definitions for one main source file, close off
401 all the lexical contexts for that file (creating struct block's for
402 them), then make the struct symtab for that file and put it in the
406 coff_end_symtab (struct objfile *objfile)
408 struct symtab *symtab;
410 last_source_start_addr = current_source_start_addr;
412 symtab = end_symtab (current_source_end_addr, objfile,
413 SECT_OFF_TEXT (objfile));
415 /* Reinitialize for beginning of new file. */
416 last_source_file = NULL;
419 static struct minimal_symbol *
420 record_minimal_symbol (struct coff_symbol *cs, CORE_ADDR address,
421 enum minimal_symbol_type type, int section,
422 struct objfile *objfile)
424 struct bfd_section *bfd_section;
426 /* We don't want TDESC entry points in the minimal symbol table. */
427 if (cs->c_name[0] == '@')
430 bfd_section = cs_to_bfd_section (cs, objfile);
431 return prim_record_minimal_symbol_and_info (cs->c_name, address,
433 bfd_section, objfile);
436 /* coff_symfile_init ()
437 is the coff-specific initialization routine for reading symbols.
438 It is passed a struct objfile which contains, among other things,
439 the BFD for the file whose symbols are being read, and a slot for
440 a pointer to "private data" which we fill with cookies and other
441 treats for coff_symfile_read ().
443 We will only be called if this is a COFF or COFF-like file. BFD
444 handles figuring out the format of the file, and code in symtab.c
445 uses BFD's determination to vector to us.
447 The ultimate result is a new symtab (or, FIXME, eventually a
451 coff_symfile_init (struct objfile *objfile)
453 /* Allocate struct to keep track of stab reading. */
454 objfile->deprecated_sym_stab_info = (struct dbx_symfile_info *)
455 xmalloc (sizeof (struct dbx_symfile_info));
457 memset (objfile->deprecated_sym_stab_info, 0,
458 sizeof (struct dbx_symfile_info));
460 /* Allocate struct to keep track of the symfile. */
461 objfile->deprecated_sym_private
462 = xmalloc (sizeof (struct coff_symfile_info));
464 memset (objfile->deprecated_sym_private, 0,
465 sizeof (struct coff_symfile_info));
467 /* COFF objects may be reordered, so set OBJF_REORDERED. If we
468 find this causes a significant slowdown in gdb then we could
469 set it in the debug symbol readers only when necessary. */
470 objfile->flags |= OBJF_REORDERED;
472 init_entry_point_info (objfile);
475 /* This function is called for every section; it finds the outer
476 limits of the line table (minimum and maximum file offset) so that
477 the mainline code can read the whole thing for efficiency. */
480 find_linenos (bfd *abfd, struct bfd_section *asect, void *vpinfo)
482 struct coff_symfile_info *info;
484 file_ptr offset, maxoff;
486 /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */
487 count = asect->lineno_count;
488 /* End of warning. */
492 size = count * local_linesz;
494 info = (struct coff_symfile_info *) vpinfo;
495 /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */
496 offset = asect->line_filepos;
497 /* End of warning. */
499 if (offset < info->min_lineno_offset || info->min_lineno_offset == 0)
500 info->min_lineno_offset = offset;
502 maxoff = offset + size;
503 if (maxoff > info->max_lineno_offset)
504 info->max_lineno_offset = maxoff;
508 /* The BFD for this file -- only good while we're actively reading
509 symbols into a psymtab or a symtab. */
511 static bfd *symfile_bfd;
513 /* Read a symbol file, after initialization by coff_symfile_init. */
516 coff_symfile_read (struct objfile *objfile, int symfile_flags)
518 struct coff_symfile_info *info;
519 struct dbx_symfile_info *dbxinfo;
520 bfd *abfd = objfile->obfd;
521 coff_data_type *cdata = coff_data (abfd);
522 char *name = bfd_get_filename (abfd);
524 unsigned int num_symbols;
526 int stringtab_offset;
527 struct cleanup *back_to, *cleanup_minimal_symbols;
530 info = (struct coff_symfile_info *) objfile->deprecated_sym_private;
531 dbxinfo = objfile->deprecated_sym_stab_info;
532 symfile_bfd = abfd; /* Kludge for swap routines. */
534 /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */
535 num_symbols = bfd_get_symcount (abfd); /* How many syms */
536 symtab_offset = cdata->sym_filepos; /* Symbol table file offset */
537 stringtab_offset = symtab_offset + /* String table file offset */
538 num_symbols * cdata->local_symesz;
540 /* Set a few file-statics that give us specific information about
541 the particular COFF file format we're reading. */
542 local_n_btmask = cdata->local_n_btmask;
543 local_n_btshft = cdata->local_n_btshft;
544 local_n_tmask = cdata->local_n_tmask;
545 local_n_tshift = cdata->local_n_tshift;
546 local_linesz = cdata->local_linesz;
547 local_symesz = cdata->local_symesz;
548 local_auxesz = cdata->local_auxesz;
550 /* Allocate space for raw symbol and aux entries, based on their
551 space requirements as reported by BFD. */
552 temp_sym = (char *) xmalloc
553 (cdata->local_symesz + cdata->local_auxesz);
554 temp_aux = temp_sym + cdata->local_symesz;
555 back_to = make_cleanup (free_current_contents, &temp_sym);
557 /* We need to know whether this is a PE file, because in PE files,
558 unlike standard COFF files, symbol values are stored as offsets
559 from the section address, rather than as absolute addresses.
560 FIXME: We should use BFD to read the symbol table, and thus avoid
563 strncmp (bfd_get_target (objfile->obfd), "pe", 2) == 0
564 || strncmp (bfd_get_target (objfile->obfd), "epoc-pe", 7) == 0;
566 /* End of warning. */
568 info->min_lineno_offset = 0;
569 info->max_lineno_offset = 0;
571 /* Only read line number information if we have symbols.
573 On Windows NT, some of the system's DLL's have sections with
574 PointerToLinenumbers fields that are non-zero, but point at
575 random places within the image file. (In the case I found,
576 KERNEL32.DLL's .text section has a line number info pointer that
577 points into the middle of the string `lib\\i386\kernel32.dll'.)
579 However, these DLL's also have no symbols. The line number
580 tables are meaningless without symbols. And in fact, GDB never
581 uses the line number information unless there are symbols. So we
582 can avoid spurious error messages (and maybe run a little
583 faster!) by not even reading the line number table unless we have
587 /* Read the line number table, all at once. */
588 bfd_map_over_sections (abfd, find_linenos, (void *) info);
590 make_cleanup (free_linetab_cleanup, 0 /*ignore*/);
591 val = init_lineno (abfd, info->min_lineno_offset,
592 info->max_lineno_offset - info->min_lineno_offset);
594 error (_("\"%s\": error reading line numbers."), name);
597 /* Now read the string table, all at once. */
599 make_cleanup (free_stringtab_cleanup, 0 /*ignore*/);
600 val = init_stringtab (abfd, stringtab_offset);
602 error (_("\"%s\": can't get string table"), name);
604 init_minimal_symbol_collection ();
605 cleanup_minimal_symbols = make_cleanup_discard_minimal_symbols ();
607 /* Now that the executable file is positioned at symbol table,
608 process it and define symbols accordingly. */
610 coff_symtab_read ((long) symtab_offset, num_symbols, objfile);
612 /* Install any minimal symbols that have been collected as the
613 current minimal symbols for this objfile. */
615 install_minimal_symbols (objfile);
617 /* Free the installed minimal symbol data. */
618 do_cleanups (cleanup_minimal_symbols);
620 bfd_map_over_sections (abfd, coff_locate_sections, (void *) info);
624 if (!info->stabstrsect)
626 error (_("The debugging information in `%s' is corrupted.\n"
627 "The file has a `.stabs' section, but no `.stabstr' section."),
631 /* FIXME: dubious. Why can't we use something normal like
632 bfd_get_section_contents? */
633 bfd_seek (abfd, abfd->where, 0);
635 stabstrsize = bfd_section_size (abfd, info->stabstrsect);
637 coffstab_build_psymtabs (objfile,
638 info->textaddr, info->textsize,
640 info->stabstrsect->filepos, stabstrsize);
642 if (dwarf2_has_info (objfile))
644 /* DWARF2 sections. */
645 dwarf2_build_psymtabs (objfile);
648 dwarf2_build_frame_info (objfile);
650 /* Try to add separate debug file if no symbols table found. */
651 if (!objfile_has_partial_symbols (objfile))
655 debugfile = find_separate_debug_file_by_debuglink (objfile);
659 bfd *abfd = symfile_bfd_open (debugfile);
661 symbol_file_add_separate (abfd, symfile_flags, objfile);
666 do_cleanups (back_to);
670 coff_new_init (struct objfile *ignore)
674 /* Perform any local cleanups required when we are done with a
675 particular objfile. I.E, we are in the process of discarding all
676 symbol information for an objfile, freeing up all memory held for
677 it, and unlinking the objfile struct from the global list of known
681 coff_symfile_finish (struct objfile *objfile)
683 if (objfile->deprecated_sym_private != NULL)
685 xfree (objfile->deprecated_sym_private);
688 /* Let stabs reader clean up. */
689 stabsread_clear_cache ();
691 dwarf2_free_objfile (objfile);
695 /* Given pointers to a symbol table in coff style exec file,
696 analyze them and create struct symtab's describing the symbols.
697 NSYMS is the number of symbols in the symbol table.
698 We read them one at a time using read_one_sym (). */
701 coff_symtab_read (long symtab_offset, unsigned int nsyms,
702 struct objfile *objfile)
704 struct gdbarch *gdbarch = get_objfile_arch (objfile);
705 struct context_stack *new;
706 struct coff_symbol coff_symbol;
707 struct coff_symbol *cs = &coff_symbol;
708 static struct internal_syment main_sym;
709 static union internal_auxent main_aux;
710 struct coff_symbol fcn_cs_saved;
711 static struct internal_syment fcn_sym_saved;
712 static union internal_auxent fcn_aux_saved;
714 /* A .file is open. */
715 int in_source_file = 0;
716 int next_file_symnum = -1;
717 /* Name of the current file. */
718 char *filestring = "";
720 int fcn_first_line = 0;
721 CORE_ADDR fcn_first_line_addr = 0;
722 int fcn_last_line = 0;
723 int fcn_start_addr = 0;
724 long fcn_line_ptr = 0;
727 struct minimal_symbol *msym;
729 /* Work around a stdio bug in SunOS4.1.1 (this makes me nervous....
730 it's hard to know I've really worked around it. The fix should
731 be harmless, anyway). The symptom of the bug is that the first
732 fread (in read_one_sym), will (in my example) actually get data
733 from file offset 268, when the fseek was to 264 (and ftell shows
734 264). This causes all hell to break loose. I was unable to
735 reproduce this on a short test program which operated on the same
736 file, performing (I think) the same sequence of operations.
738 It stopped happening when I put in this (former) rewind().
740 FIXME: Find out if this has been reported to Sun, whether it has
741 been fixed in a later release, etc. */
743 bfd_seek (objfile->obfd, 0, 0);
745 /* Position to read the symbol table. */
746 val = bfd_seek (objfile->obfd, (long) symtab_offset, 0);
748 perror_with_name (objfile->name);
750 current_objfile = objfile;
751 nlist_bfd_global = objfile->obfd;
752 nlist_nsyms_global = nsyms;
753 last_source_file = NULL;
754 memset (opaque_type_chain, 0, sizeof opaque_type_chain);
756 if (type_vector) /* Get rid of previous one. */
758 type_vector_length = 160;
759 type_vector = (struct type **)
760 xmalloc (type_vector_length * sizeof (struct type *));
761 memset (type_vector, 0, type_vector_length * sizeof (struct type *));
763 coff_start_symtab ("");
766 while (symnum < nsyms)
768 QUIT; /* Make this command interruptable. */
770 read_one_sym (cs, &main_sym, &main_aux);
772 if (cs->c_symnum == next_file_symnum && cs->c_sclass != C_FILE)
774 if (last_source_file)
775 coff_end_symtab (objfile);
777 coff_start_symtab ("_globals_");
778 /* coff_start_symtab will set the language of this symtab to
779 language_unknown, since such a ``file name'' is not
780 recognized. Override that with the minimal language to
781 allow printing values in this symtab. */
782 current_subfile->language = language_minimal;
783 complete_symtab ("_globals_", 0, 0);
784 /* Done with all files, everything from here on out is
788 /* Special case for file with type declarations only, no
790 if (!last_source_file && SDB_TYPE (cs->c_type)
791 && cs->c_secnum == N_DEBUG)
792 complete_symtab (filestring, 0, 0);
794 /* Typedefs should not be treated as symbol definitions. */
795 if (ISFCN (cs->c_type) && cs->c_sclass != C_TPDEF)
797 /* Record all functions -- external and static -- in
799 int section = cs_to_section (cs, objfile);
801 tmpaddr = cs->c_value + ANOFFSET (objfile->section_offsets,
802 SECT_OFF_TEXT (objfile));
803 record_minimal_symbol (cs, tmpaddr, mst_text,
806 fcn_line_ptr = main_aux.x_sym.x_fcnary.x_fcn.x_lnnoptr;
807 fcn_start_addr = tmpaddr;
809 fcn_sym_saved = main_sym;
810 fcn_aux_saved = main_aux;
814 switch (cs->c_sclass)
823 complaint (&symfile_complaints,
824 _("Bad n_sclass for symbol %s"),
829 /* c_value field contains symnum of next .file entry in
830 table or symnum of first global after last .file. */
831 next_file_symnum = cs->c_value;
833 filestring = coff_getfilename (&main_aux);
837 /* Complete symbol table for last object file
838 containing debugging information. */
839 if (last_source_file)
841 coff_end_symtab (objfile);
842 coff_start_symtab (filestring);
847 /* C_LABEL is used for labels and static functions.
848 Including it here allows gdb to see static functions when
849 no debug info is available. */
851 /* However, labels within a function can make weird
858 case C_THUMBSTATFUNC:
859 if (cs->c_name[0] == '.')
861 if (strcmp (cs->c_name, ".text") == 0)
863 /* FIXME: don't wire in ".text" as section name or
865 /* Check for in_source_file deals with case of a
866 file with debugging symbols followed by a later
867 file with no symbols. */
869 complete_symtab (filestring,
870 cs->c_value + ANOFFSET (objfile->section_offsets,
871 SECT_OFF_TEXT (objfile)),
872 main_aux.x_scn.x_scnlen);
875 /* Flush rest of '.' symbols. */
878 else if (!SDB_TYPE (cs->c_type)
879 && cs->c_name[0] == 'L'
880 && (strncmp (cs->c_name, "LI%", 3) == 0
881 || strncmp (cs->c_name, "LF%", 3) == 0
882 || strncmp (cs->c_name, "LC%", 3) == 0
883 || strncmp (cs->c_name, "LP%", 3) == 0
884 || strncmp (cs->c_name, "LPB%", 4) == 0
885 || strncmp (cs->c_name, "LBB%", 4) == 0
886 || strncmp (cs->c_name, "LBE%", 4) == 0
887 || strncmp (cs->c_name, "LPBX%", 5) == 0))
888 /* At least on a 3b1, gcc generates swbeg and string labels
889 that look like this. Ignore them. */
891 /* Fall in for static symbols that don't start with '.' */
896 /* Record it in the minimal symbols regardless of
897 SDB_TYPE. This parallels what we do for other debug
898 formats, and probably is needed to make
899 print_address_symbolic work right without the (now
900 gone) "set fast-symbolic-addr off" kludge. */
902 enum minimal_symbol_type ms_type;
905 if (cs->c_secnum == N_UNDEF)
907 /* This is a common symbol. See if the target
908 environment knows where it has been relocated to. */
911 if (target_lookup_symbol (cs->c_name, &reladdr))
913 /* Error in lookup; ignore symbol. */
917 /* The address has already been relocated; make sure that
918 objfile_relocate doesn't relocate it again. */
920 ms_type = cs->c_sclass == C_EXT
921 || cs->c_sclass == C_THUMBEXT ?
922 mst_bss : mst_file_bss;
924 else if (cs->c_secnum == N_ABS)
926 /* Use the correct minimal symbol type (and don't
927 relocate) for absolute values. */
929 sec = cs_to_section (cs, objfile);
930 tmpaddr = cs->c_value;
934 asection *bfd_section = cs_to_bfd_section (cs, objfile);
936 sec = cs_to_section (cs, objfile);
937 tmpaddr = cs->c_value;
938 /* Statics in a PE file also get relocated. */
939 if (cs->c_sclass == C_EXT
940 || cs->c_sclass == C_THUMBEXTFUNC
941 || cs->c_sclass == C_THUMBEXT
942 || (pe_file && (cs->c_sclass == C_STAT)))
943 tmpaddr += ANOFFSET (objfile->section_offsets, sec);
945 if (bfd_section->flags & SEC_CODE)
948 cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXTFUNC
949 || cs->c_sclass == C_THUMBEXT ?
950 mst_text : mst_file_text;
951 tmpaddr = gdbarch_smash_text_address (gdbarch, tmpaddr);
953 else if (bfd_section->flags & SEC_ALLOC
954 && bfd_section->flags & SEC_LOAD)
957 cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXT
958 ? mst_data : mst_file_data;
960 else if (bfd_section->flags & SEC_ALLOC)
963 cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXT
964 ? mst_bss : mst_file_bss;
967 ms_type = mst_unknown;
970 msym = record_minimal_symbol (cs, tmpaddr, ms_type,
973 gdbarch_coff_make_msymbol_special (gdbarch,
976 if (SDB_TYPE (cs->c_type))
980 sym = process_coff_symbol
981 (cs, &main_aux, objfile);
982 SYMBOL_VALUE (sym) = tmpaddr;
983 SYMBOL_SECTION (sym) = sec;
989 if (strcmp (cs->c_name, ".bf") == 0)
993 /* Value contains address of first non-init type
995 /* main_aux.x_sym.x_misc.x_lnsz.x_lnno
996 contains line number of '{' }. */
998 complaint (&symfile_complaints,
999 _("`.bf' symbol %d has no aux entry"),
1001 fcn_first_line = main_aux.x_sym.x_misc.x_lnsz.x_lnno;
1002 fcn_first_line_addr = cs->c_value;
1004 /* Might want to check that locals are 0 and
1005 context_stack_depth is zero, and complain if not. */
1008 new = push_context (depth, fcn_start_addr);
1009 fcn_cs_saved.c_name = getsymname (&fcn_sym_saved);
1011 process_coff_symbol (&fcn_cs_saved,
1012 &fcn_aux_saved, objfile);
1014 else if (strcmp (cs->c_name, ".ef") == 0)
1016 if (!within_function)
1017 error (_("Bad coff function information."));
1018 /* The value of .ef is the address of epilogue code;
1019 not useful for gdb. */
1020 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1021 contains number of lines to '}' */
1023 if (context_stack_depth <= 0)
1024 { /* We attempted to pop an empty context stack. */
1025 complaint (&symfile_complaints,
1026 _("`.ef' symbol without matching `.bf' symbol ignored starting at symnum %d"),
1028 within_function = 0;
1032 new = pop_context ();
1033 /* Stack must be empty now. */
1034 if (context_stack_depth > 0 || new == NULL)
1036 complaint (&symfile_complaints,
1037 _("Unmatched .ef symbol(s) ignored starting at symnum %d"),
1039 within_function = 0;
1042 if (cs->c_naux != 1)
1044 complaint (&symfile_complaints,
1045 _("`.ef' symbol %d has no aux entry"),
1047 fcn_last_line = 0x7FFFFFFF;
1051 fcn_last_line = main_aux.x_sym.x_misc.x_lnsz.x_lnno;
1053 /* fcn_first_line is the line number of the opening '{'.
1054 Do not record it - because it would affect gdb's idea
1055 of the line number of the first statement of the
1056 function - except for one-line functions, for which
1057 it is also the line number of all the statements and
1058 of the closing '}', and for which we do not have any
1059 other statement-line-number. */
1060 if (fcn_last_line == 1)
1061 record_line (current_subfile, fcn_first_line,
1062 gdbarch_addr_bits_remove (gdbarch,
1063 fcn_first_line_addr));
1065 enter_linenos (fcn_line_ptr, fcn_first_line,
1066 fcn_last_line, objfile);
1068 finish_block (new->name, &local_symbols,
1069 new->old_blocks, new->start_addr,
1070 fcn_cs_saved.c_value
1071 + fcn_aux_saved.x_sym.x_misc.x_fsize
1072 + ANOFFSET (objfile->section_offsets,
1073 SECT_OFF_TEXT (objfile)),
1076 within_function = 0;
1081 if (strcmp (cs->c_name, ".bb") == 0)
1083 tmpaddr = cs->c_value;
1084 tmpaddr += ANOFFSET (objfile->section_offsets,
1085 SECT_OFF_TEXT (objfile));
1086 push_context (++depth, tmpaddr);
1088 else if (strcmp (cs->c_name, ".eb") == 0)
1090 if (context_stack_depth <= 0)
1091 { /* We attempted to pop an empty context stack. */
1092 complaint (&symfile_complaints,
1093 _("`.eb' symbol without matching `.bb' symbol ignored starting at symnum %d"),
1098 new = pop_context ();
1099 if (depth-- != new->depth)
1101 complaint (&symfile_complaints,
1102 _("Mismatched .eb symbol ignored starting at symnum %d"),
1106 if (local_symbols && context_stack_depth > 0)
1109 cs->c_value + ANOFFSET (objfile->section_offsets,
1110 SECT_OFF_TEXT (objfile));
1111 /* Make a block for the local symbols within. */
1112 finish_block (0, &local_symbols, new->old_blocks,
1113 new->start_addr, tmpaddr, objfile);
1115 /* Now pop locals of block just finished. */
1116 local_symbols = new->locals;
1121 process_coff_symbol (cs, &main_aux, objfile);
1126 if ((nsyms == 0) && (pe_file))
1128 /* We've got no debugging symbols, but it's a portable
1129 executable, so try to read the export table. */
1130 read_pe_exported_syms (objfile);
1133 if (last_source_file)
1134 coff_end_symtab (objfile);
1136 /* Patch up any opaque types (references to types that are not defined
1137 in the file where they are referenced, e.g. "struct foo *bar"). */
1138 ALL_OBJFILE_SYMTABS (objfile, s)
1139 patch_opaque_types (s);
1141 current_objfile = NULL;
1144 /* Routines for reading headers and symbols from executable. */
1146 /* Read the next symbol, swap it, and return it in both
1147 internal_syment form, and coff_symbol form. Also return its first
1148 auxent, if any, in internal_auxent form, and skip any other
1152 read_one_sym (struct coff_symbol *cs,
1153 struct internal_syment *sym,
1154 union internal_auxent *aux)
1157 bfd_size_type bytes;
1159 cs->c_symnum = symnum;
1160 bytes = bfd_bread (temp_sym, local_symesz, nlist_bfd_global);
1161 if (bytes != local_symesz)
1162 error ("%s: error reading symbols", current_objfile->name);
1163 bfd_coff_swap_sym_in (symfile_bfd, temp_sym, (char *) sym);
1164 cs->c_naux = sym->n_numaux & 0xff;
1165 if (cs->c_naux >= 1)
1167 bytes = bfd_bread (temp_aux, local_auxesz, nlist_bfd_global);
1168 if (bytes != local_auxesz)
1169 error ("%s: error reading symbols", current_objfile->name);
1170 bfd_coff_swap_aux_in (symfile_bfd, temp_aux,
1171 sym->n_type, sym->n_sclass,
1172 0, cs->c_naux, (char *) aux);
1173 /* If more than one aux entry, read past it (only the first aux
1175 for (i = 1; i < cs->c_naux; i++)
1177 bytes = bfd_bread (temp_aux, local_auxesz, nlist_bfd_global);
1178 if (bytes != local_auxesz)
1179 error ("%s: error reading symbols", current_objfile->name);
1182 cs->c_name = getsymname (sym);
1183 cs->c_value = sym->n_value;
1184 cs->c_sclass = (sym->n_sclass & 0xff);
1185 cs->c_secnum = sym->n_scnum;
1186 cs->c_type = (unsigned) sym->n_type;
1187 if (!SDB_TYPE (cs->c_type))
1191 if (cs->c_sclass & 128)
1192 printf (_("thumb symbol %s, class 0x%x\n"), cs->c_name, cs->c_sclass);
1195 symnum += 1 + cs->c_naux;
1197 /* The PE file format stores symbol values as offsets within the
1198 section, rather than as absolute addresses. We correct that
1199 here, if the symbol has an appropriate storage class. FIXME: We
1200 should use BFD to read the symbols, rather than duplicating the
1204 switch (cs->c_sclass)
1208 case C_THUMBEXTFUNC:
1213 case C_THUMBSTATFUNC:
1219 if (cs->c_secnum != 0)
1220 cs->c_value += cs_section_address (cs, symfile_bfd);
1226 /* Support for string table handling. */
1228 static char *stringtab = NULL;
1231 init_stringtab (bfd *abfd, long offset)
1235 unsigned char lengthbuf[4];
1239 /* If the file is stripped, the offset might be zero, indicating no
1240 string table. Just return with `stringtab' set to null. */
1244 if (bfd_seek (abfd, offset, 0) < 0)
1247 val = bfd_bread ((char *) lengthbuf, sizeof lengthbuf, abfd);
1248 length = bfd_h_get_32 (symfile_bfd, lengthbuf);
1250 /* If no string table is needed, then the file may end immediately
1251 after the symbols. Just return with `stringtab' set to null. */
1252 if (val != sizeof lengthbuf || length < sizeof lengthbuf)
1255 stringtab = (char *) xmalloc (length);
1256 /* This is in target format (probably not very useful, and not
1257 currently used), not host format. */
1258 memcpy (stringtab, lengthbuf, sizeof lengthbuf);
1259 if (length == sizeof length) /* Empty table -- just the count. */
1262 val = bfd_bread (stringtab + sizeof lengthbuf,
1263 length - sizeof lengthbuf, abfd);
1264 if (val != length - sizeof lengthbuf || stringtab[length - 1] != '\0')
1271 free_stringtab (void)
1279 free_stringtab_cleanup (void *ignore)
1285 getsymname (struct internal_syment *symbol_entry)
1287 static char buffer[SYMNMLEN + 1];
1290 if (symbol_entry->_n._n_n._n_zeroes == 0)
1292 /* FIXME: Probably should be detecting corrupt symbol files by
1293 seeing whether offset points to within the stringtab. */
1294 result = stringtab + symbol_entry->_n._n_n._n_offset;
1298 strncpy (buffer, symbol_entry->_n._n_name, SYMNMLEN);
1299 buffer[SYMNMLEN] = '\0';
1305 /* Extract the file name from the aux entry of a C_FILE symbol.
1306 Return only the last component of the name. Result is in static
1307 storage and is only good for temporary use. */
1310 coff_getfilename (union internal_auxent *aux_entry)
1312 static char buffer[BUFSIZ];
1316 if (aux_entry->x_file.x_n.x_zeroes == 0)
1317 strcpy (buffer, stringtab + aux_entry->x_file.x_n.x_offset);
1320 strncpy (buffer, aux_entry->x_file.x_fname, FILNMLEN);
1321 buffer[FILNMLEN] = '\0';
1325 /* FIXME: We should not be throwing away the information about what
1326 directory. It should go into dirname of the symtab, or some such
1328 if ((temp = strrchr (result, '/')) != NULL)
1333 /* Support for line number handling. */
1335 static char *linetab = NULL;
1336 static long linetab_offset;
1337 static unsigned long linetab_size;
1339 /* Read in all the line numbers for fast lookups later. Leave them in
1340 external (unswapped) format in memory; we'll swap them as we enter
1341 them into GDB's data structures. */
1344 init_lineno (bfd *abfd, long offset, int size)
1348 linetab_offset = offset;
1349 linetab_size = size;
1356 if (bfd_seek (abfd, offset, 0) < 0)
1359 /* Allocate the desired table, plus a sentinel. */
1360 linetab = (char *) xmalloc (size + local_linesz);
1362 val = bfd_bread (linetab, size, abfd);
1366 /* Terminate it with an all-zero sentinel record. */
1367 memset (linetab + size, 0, local_linesz);
1381 free_linetab_cleanup (void *ignore)
1386 #if !defined (L_LNNO32)
1387 #define L_LNNO32(lp) ((lp)->l_lnno)
1391 enter_linenos (long file_offset, int first_line,
1392 int last_line, struct objfile *objfile)
1394 struct gdbarch *gdbarch = get_objfile_arch (objfile);
1396 struct internal_lineno lptr;
1400 if (file_offset < linetab_offset)
1402 complaint (&symfile_complaints,
1403 _("Line number pointer %ld lower than start of line numbers"),
1405 if (file_offset > linetab_size) /* Too big to be an offset? */
1407 file_offset += linetab_offset; /* Try reading at that linetab
1411 rawptr = &linetab[file_offset - linetab_offset];
1413 /* Skip first line entry for each function. */
1414 rawptr += local_linesz;
1415 /* Line numbers start at one for the first line of the function. */
1418 /* If the line number table is full (e.g. 64K lines in COFF debug
1419 info), the next function's L_LNNO32 might not be zero, so don't
1420 overstep the table's end in any case. */
1421 while (rawptr <= &linetab[0] + linetab_size)
1423 bfd_coff_swap_lineno_in (symfile_bfd, rawptr, &lptr);
1424 rawptr += local_linesz;
1425 /* The next function, or the sentinel, will have L_LNNO32 zero;
1427 if (L_LNNO32 (&lptr) && L_LNNO32 (&lptr) <= last_line)
1429 CORE_ADDR addr = lptr.l_addr.l_paddr;
1430 addr += ANOFFSET (objfile->section_offsets,
1431 SECT_OFF_TEXT (objfile));
1432 record_line (current_subfile,
1433 first_line + L_LNNO32 (&lptr),
1434 gdbarch_addr_bits_remove (gdbarch, addr));
1442 patch_type (struct type *type, struct type *real_type)
1444 struct type *target = TYPE_TARGET_TYPE (type);
1445 struct type *real_target = TYPE_TARGET_TYPE (real_type);
1446 int field_size = TYPE_NFIELDS (real_target) * sizeof (struct field);
1448 TYPE_LENGTH (target) = TYPE_LENGTH (real_target);
1449 TYPE_NFIELDS (target) = TYPE_NFIELDS (real_target);
1450 TYPE_FIELDS (target) = (struct field *) TYPE_ALLOC (target,
1453 memcpy (TYPE_FIELDS (target),
1454 TYPE_FIELDS (real_target),
1457 if (TYPE_NAME (real_target))
1459 if (TYPE_NAME (target))
1460 xfree (TYPE_NAME (target));
1461 TYPE_NAME (target) = concat (TYPE_NAME (real_target),
1466 /* Patch up all appropriate typedef symbols in the opaque_type_chains
1467 so that they can be used to print out opaque data structures
1471 patch_opaque_types (struct symtab *s)
1474 struct dict_iterator iter;
1475 struct symbol *real_sym;
1477 /* Go through the per-file symbols only. */
1478 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK);
1479 ALL_BLOCK_SYMBOLS (b, iter, real_sym)
1481 /* Find completed typedefs to use to fix opaque ones.
1482 Remove syms from the chain when their types are stored,
1483 but search the whole chain, as there may be several syms
1484 from different files with the same name. */
1485 if (SYMBOL_CLASS (real_sym) == LOC_TYPEDEF
1486 && SYMBOL_DOMAIN (real_sym) == VAR_DOMAIN
1487 && TYPE_CODE (SYMBOL_TYPE (real_sym)) == TYPE_CODE_PTR
1488 && TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (real_sym))) != 0)
1490 char *name = SYMBOL_LINKAGE_NAME (real_sym);
1491 int hash = hashname (name);
1492 struct symbol *sym, *prev;
1495 for (sym = opaque_type_chain[hash]; sym;)
1497 if (name[0] == SYMBOL_LINKAGE_NAME (sym)[0]
1498 && strcmp (name + 1, SYMBOL_LINKAGE_NAME (sym) + 1) == 0)
1502 SYMBOL_VALUE_CHAIN (prev) = SYMBOL_VALUE_CHAIN (sym);
1506 opaque_type_chain[hash] = SYMBOL_VALUE_CHAIN (sym);
1509 patch_type (SYMBOL_TYPE (sym), SYMBOL_TYPE (real_sym));
1513 sym = SYMBOL_VALUE_CHAIN (prev);
1517 sym = opaque_type_chain[hash];
1523 sym = SYMBOL_VALUE_CHAIN (sym);
1531 coff_reg_to_regnum (struct symbol *sym, struct gdbarch *gdbarch)
1533 return gdbarch_sdb_reg_to_regnum (gdbarch, SYMBOL_VALUE (sym));
1536 static const struct symbol_register_ops coff_register_funcs = {
1540 static struct symbol *
1541 process_coff_symbol (struct coff_symbol *cs,
1542 union internal_auxent *aux,
1543 struct objfile *objfile)
1546 = (struct symbol *) obstack_alloc (&objfile->objfile_obstack,
1547 sizeof (struct symbol));
1550 memset (sym, 0, sizeof (struct symbol));
1552 name = EXTERNAL_NAME (name, objfile->obfd);
1553 SYMBOL_SET_LANGUAGE (sym, current_subfile->language);
1554 SYMBOL_SET_NAMES (sym, name, strlen (name), 1, objfile);
1556 /* default assumptions */
1557 SYMBOL_VALUE (sym) = cs->c_value;
1558 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1559 SYMBOL_SECTION (sym) = cs_to_section (cs, objfile);
1561 if (ISFCN (cs->c_type))
1563 SYMBOL_VALUE (sym) += ANOFFSET (objfile->section_offsets,
1564 SECT_OFF_TEXT (objfile));
1566 lookup_function_type (decode_function_type (cs, cs->c_type,
1569 SYMBOL_CLASS (sym) = LOC_BLOCK;
1570 if (cs->c_sclass == C_STAT || cs->c_sclass == C_THUMBSTAT
1571 || cs->c_sclass == C_THUMBSTATFUNC)
1572 add_symbol_to_list (sym, &file_symbols);
1573 else if (cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXT
1574 || cs->c_sclass == C_THUMBEXTFUNC)
1575 add_symbol_to_list (sym, &global_symbols);
1579 SYMBOL_TYPE (sym) = decode_type (cs, cs->c_type, aux, objfile);
1580 switch (cs->c_sclass)
1586 SYMBOL_CLASS (sym) = LOC_LOCAL;
1587 add_symbol_to_list (sym, &local_symbols);
1591 case C_THUMBEXTFUNC:
1593 SYMBOL_CLASS (sym) = LOC_STATIC;
1594 SYMBOL_VALUE_ADDRESS (sym) = (CORE_ADDR) cs->c_value;
1595 SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets,
1596 SECT_OFF_TEXT (objfile));
1597 add_symbol_to_list (sym, &global_symbols);
1601 case C_THUMBSTATFUNC:
1603 SYMBOL_CLASS (sym) = LOC_STATIC;
1604 SYMBOL_VALUE_ADDRESS (sym) = (CORE_ADDR) cs->c_value;
1605 SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets,
1606 SECT_OFF_TEXT (objfile));
1607 if (within_function)
1609 /* Static symbol of local scope. */
1610 add_symbol_to_list (sym, &local_symbols);
1614 /* Static symbol at top level of file. */
1615 add_symbol_to_list (sym, &file_symbols);
1619 #ifdef C_GLBLREG /* AMD coff */
1623 SYMBOL_CLASS (sym) = LOC_REGISTER;
1624 SYMBOL_REGISTER_OPS (sym) = &coff_register_funcs;
1625 SYMBOL_VALUE (sym) = cs->c_value;
1626 add_symbol_to_list (sym, &local_symbols);
1634 SYMBOL_CLASS (sym) = LOC_ARG;
1635 SYMBOL_IS_ARGUMENT (sym) = 1;
1636 add_symbol_to_list (sym, &local_symbols);
1640 SYMBOL_CLASS (sym) = LOC_REGISTER;
1641 SYMBOL_REGISTER_OPS (sym) = &coff_register_funcs;
1642 SYMBOL_IS_ARGUMENT (sym) = 1;
1643 SYMBOL_VALUE (sym) = cs->c_value;
1644 add_symbol_to_list (sym, &local_symbols);
1648 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
1649 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1651 /* If type has no name, give it one */
1652 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
1654 if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR
1655 || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_FUNC)
1657 /* If we are giving a name to a type such as
1658 "pointer to foo" or "function returning foo", we
1659 better not set the TYPE_NAME. If the program
1660 contains "typedef char *caddr_t;", we don't want
1661 all variables of type char * to print as caddr_t.
1662 This is not just a consequence of GDB's type
1663 management; CC and GCC (at least through version
1664 2.4) both output variables of either type char *
1665 or caddr_t with the type refering to the C_TPDEF
1666 symbol for caddr_t. If a future compiler cleans
1667 this up it GDB is not ready for it yet, but if it
1668 becomes ready we somehow need to disable this
1669 check (without breaking the PCC/GCC2.4 case).
1673 Fortunately, this check seems not to be necessary
1674 for anything except pointers or functions. */
1678 TYPE_NAME (SYMBOL_TYPE (sym)) =
1679 concat (SYMBOL_LINKAGE_NAME (sym), (char *) NULL);
1682 /* Keep track of any type which points to empty structured
1683 type, so it can be filled from a definition from another
1684 file. A simple forward reference (TYPE_CODE_UNDEF) is
1685 not an empty structured type, though; the forward
1686 references work themselves out via the magic of
1687 coff_lookup_type. */
1688 if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR
1689 && TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym))) == 0
1690 && TYPE_CODE (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym)))
1693 int i = hashname (SYMBOL_LINKAGE_NAME (sym));
1695 SYMBOL_VALUE_CHAIN (sym) = opaque_type_chain[i];
1696 opaque_type_chain[i] = sym;
1698 add_symbol_to_list (sym, &file_symbols);
1704 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
1705 SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
1707 /* Some compilers try to be helpful by inventing "fake"
1708 names for anonymous enums, structures, and unions, like
1709 "~0fake" or ".0fake". Thanks, but no thanks... */
1710 if (TYPE_TAG_NAME (SYMBOL_TYPE (sym)) == 0)
1711 if (SYMBOL_LINKAGE_NAME (sym) != NULL
1712 && *SYMBOL_LINKAGE_NAME (sym) != '~'
1713 && *SYMBOL_LINKAGE_NAME (sym) != '.')
1714 TYPE_TAG_NAME (SYMBOL_TYPE (sym)) =
1715 concat (SYMBOL_LINKAGE_NAME (sym), (char *)NULL);
1717 add_symbol_to_list (sym, &file_symbols);
1727 /* Decode a coff type specifier; return the type that is meant. */
1729 static struct type *
1730 decode_type (struct coff_symbol *cs, unsigned int c_type,
1731 union internal_auxent *aux, struct objfile *objfile)
1733 struct type *type = 0;
1734 unsigned int new_c_type;
1736 if (c_type & ~N_BTMASK)
1738 new_c_type = DECREF (c_type);
1741 type = decode_type (cs, new_c_type, aux, objfile);
1742 type = lookup_pointer_type (type);
1744 else if (ISFCN (c_type))
1746 type = decode_type (cs, new_c_type, aux, objfile);
1747 type = lookup_function_type (type);
1749 else if (ISARY (c_type))
1752 unsigned short *dim;
1753 struct type *base_type, *index_type, *range_type;
1755 /* Define an array type. */
1756 /* auxent refers to array, not base type. */
1757 if (aux->x_sym.x_tagndx.l == 0)
1760 /* Shift the indices down. */
1761 dim = &aux->x_sym.x_fcnary.x_ary.x_dimen[0];
1764 for (i = 0; *dim && i < DIMNUM - 1; i++, dim++)
1768 base_type = decode_type (cs, new_c_type, aux, objfile);
1769 index_type = objfile_type (objfile)->builtin_int;
1771 create_range_type ((struct type *) NULL,
1772 index_type, 0, n - 1);
1774 create_array_type ((struct type *) NULL,
1775 base_type, range_type);
1780 /* Reference to existing type. This only occurs with the struct,
1781 union, and enum types. EPI a29k coff fakes us out by producing
1782 aux entries with a nonzero x_tagndx for definitions of structs,
1783 unions, and enums, so we have to check the c_sclass field. SCO
1784 3.2v4 cc gets confused with pointers to pointers to defined
1785 structs, and generates negative x_tagndx fields. */
1786 if (cs->c_naux > 0 && aux->x_sym.x_tagndx.l != 0)
1788 if (cs->c_sclass != C_STRTAG
1789 && cs->c_sclass != C_UNTAG
1790 && cs->c_sclass != C_ENTAG
1791 && aux->x_sym.x_tagndx.l >= 0)
1793 type = coff_alloc_type (aux->x_sym.x_tagndx.l);
1798 complaint (&symfile_complaints,
1799 _("Symbol table entry for %s has bad tagndx value"),
1801 /* And fall through to decode_base_type... */
1805 return decode_base_type (cs, BTYPE (c_type), aux, objfile);
1808 /* Decode a coff type specifier for function definition;
1809 return the type that the function returns. */
1811 static struct type *
1812 decode_function_type (struct coff_symbol *cs,
1813 unsigned int c_type,
1814 union internal_auxent *aux,
1815 struct objfile *objfile)
1817 if (aux->x_sym.x_tagndx.l == 0)
1818 cs->c_naux = 0; /* auxent refers to function, not base
1821 return decode_type (cs, DECREF (c_type), aux, objfile);
1824 /* Basic C types. */
1826 static struct type *
1827 decode_base_type (struct coff_symbol *cs,
1828 unsigned int c_type,
1829 union internal_auxent *aux,
1830 struct objfile *objfile)
1832 struct gdbarch *gdbarch = get_objfile_arch (objfile);
1838 /* Shows up with "void (*foo)();" structure members. */
1839 return objfile_type (objfile)->builtin_void;
1843 /* Intel 960 COFF has this symbol and meaning. */
1844 return objfile_type (objfile)->builtin_void;
1848 return objfile_type (objfile)->builtin_char;
1851 return objfile_type (objfile)->builtin_short;
1854 return objfile_type (objfile)->builtin_int;
1857 if (cs->c_sclass == C_FIELD
1858 && aux->x_sym.x_misc.x_lnsz.x_size
1859 > gdbarch_long_bit (gdbarch))
1860 return objfile_type (objfile)->builtin_long_long;
1862 return objfile_type (objfile)->builtin_long;
1865 return objfile_type (objfile)->builtin_float;
1868 return objfile_type (objfile)->builtin_double;
1871 return objfile_type (objfile)->builtin_long_double;
1874 if (cs->c_naux != 1)
1876 /* Anonymous structure type. */
1877 type = coff_alloc_type (cs->c_symnum);
1878 TYPE_CODE (type) = TYPE_CODE_STRUCT;
1879 TYPE_NAME (type) = NULL;
1880 /* This used to set the tag to "<opaque>". But I think
1881 setting it to NULL is right, and the printing code can
1882 print it as "struct {...}". */
1883 TYPE_TAG_NAME (type) = NULL;
1884 INIT_CPLUS_SPECIFIC (type);
1885 TYPE_LENGTH (type) = 0;
1886 TYPE_FIELDS (type) = 0;
1887 TYPE_NFIELDS (type) = 0;
1891 type = coff_read_struct_type (cs->c_symnum,
1892 aux->x_sym.x_misc.x_lnsz.x_size,
1893 aux->x_sym.x_fcnary.x_fcn.x_endndx.l,
1899 if (cs->c_naux != 1)
1901 /* Anonymous union type. */
1902 type = coff_alloc_type (cs->c_symnum);
1903 TYPE_NAME (type) = NULL;
1904 /* This used to set the tag to "<opaque>". But I think
1905 setting it to NULL is right, and the printing code can
1906 print it as "union {...}". */
1907 TYPE_TAG_NAME (type) = NULL;
1908 INIT_CPLUS_SPECIFIC (type);
1909 TYPE_LENGTH (type) = 0;
1910 TYPE_FIELDS (type) = 0;
1911 TYPE_NFIELDS (type) = 0;
1915 type = coff_read_struct_type (cs->c_symnum,
1916 aux->x_sym.x_misc.x_lnsz.x_size,
1917 aux->x_sym.x_fcnary.x_fcn.x_endndx.l,
1920 TYPE_CODE (type) = TYPE_CODE_UNION;
1924 if (cs->c_naux != 1)
1926 /* Anonymous enum type. */
1927 type = coff_alloc_type (cs->c_symnum);
1928 TYPE_CODE (type) = TYPE_CODE_ENUM;
1929 TYPE_NAME (type) = NULL;
1930 /* This used to set the tag to "<opaque>". But I think
1931 setting it to NULL is right, and the printing code can
1932 print it as "enum {...}". */
1933 TYPE_TAG_NAME (type) = NULL;
1934 TYPE_LENGTH (type) = 0;
1935 TYPE_FIELDS (type) = 0;
1936 TYPE_NFIELDS (type) = 0;
1940 type = coff_read_enum_type (cs->c_symnum,
1941 aux->x_sym.x_misc.x_lnsz.x_size,
1942 aux->x_sym.x_fcnary.x_fcn.x_endndx.l,
1948 /* Shouldn't show up here. */
1952 return objfile_type (objfile)->builtin_unsigned_char;
1955 return objfile_type (objfile)->builtin_unsigned_short;
1958 return objfile_type (objfile)->builtin_unsigned_int;
1961 if (cs->c_sclass == C_FIELD
1962 && aux->x_sym.x_misc.x_lnsz.x_size
1963 > gdbarch_long_bit (gdbarch))
1964 return objfile_type (objfile)->builtin_unsigned_long_long;
1966 return objfile_type (objfile)->builtin_unsigned_long;
1968 complaint (&symfile_complaints,
1969 _("Unexpected type for symbol %s"), cs->c_name);
1970 return objfile_type (objfile)->builtin_void;
1973 /* This page contains subroutines of read_type. */
1975 /* Read the description of a structure (or union type) and return an
1976 object describing the type. */
1978 static struct type *
1979 coff_read_struct_type (int index, int length, int lastsym,
1980 struct objfile *objfile)
1984 struct nextfield *next;
1989 struct nextfield *list = 0;
1990 struct nextfield *new;
1994 struct coff_symbol member_sym;
1995 struct coff_symbol *ms = &member_sym;
1996 struct internal_syment sub_sym;
1997 union internal_auxent sub_aux;
2000 type = coff_alloc_type (index);
2001 TYPE_CODE (type) = TYPE_CODE_STRUCT;
2002 INIT_CPLUS_SPECIFIC (type);
2003 TYPE_LENGTH (type) = length;
2005 while (!done && symnum < lastsym && symnum < nlist_nsyms_global)
2007 read_one_sym (ms, &sub_sym, &sub_aux);
2009 name = EXTERNAL_NAME (name, objfile->obfd);
2011 switch (ms->c_sclass)
2016 /* Get space to record the next field's data. */
2017 new = (struct nextfield *) alloca (sizeof (struct nextfield));
2021 /* Save the data. */
2022 list->field.name = obsavestring (name, strlen (name),
2023 &objfile->objfile_obstack);
2024 FIELD_TYPE (list->field) = decode_type (ms, ms->c_type,
2026 SET_FIELD_BITPOS (list->field, 8 * ms->c_value);
2027 FIELD_BITSIZE (list->field) = 0;
2033 /* Get space to record the next field's data. */
2034 new = (struct nextfield *) alloca (sizeof (struct nextfield));
2038 /* Save the data. */
2039 list->field.name = obsavestring (name, strlen (name),
2040 &objfile->objfile_obstack);
2041 FIELD_TYPE (list->field) = decode_type (ms, ms->c_type,
2043 SET_FIELD_BITPOS (list->field, ms->c_value);
2044 FIELD_BITSIZE (list->field) = sub_aux.x_sym.x_misc.x_lnsz.x_size;
2053 /* Now create the vector of fields, and record how big it is. */
2055 TYPE_NFIELDS (type) = nfields;
2056 TYPE_FIELDS (type) = (struct field *)
2057 TYPE_ALLOC (type, sizeof (struct field) * nfields);
2059 /* Copy the saved-up fields into the field vector. */
2061 for (n = nfields; list; list = list->next)
2062 TYPE_FIELD (type, --n) = list->field;
2067 /* Read a definition of an enumeration type,
2068 and create and return a suitable type object.
2069 Also defines the symbols that represent the values of the type. */
2071 static struct type *
2072 coff_read_enum_type (int index, int length, int lastsym,
2073 struct objfile *objfile)
2075 struct gdbarch *gdbarch = get_objfile_arch (objfile);
2080 struct pending **symlist;
2081 struct coff_symbol member_sym;
2082 struct coff_symbol *ms = &member_sym;
2083 struct internal_syment sub_sym;
2084 union internal_auxent sub_aux;
2085 struct pending *osyms, *syms;
2089 int unsigned_enum = 1;
2091 type = coff_alloc_type (index);
2092 if (within_function)
2093 symlist = &local_symbols;
2095 symlist = &file_symbols;
2097 o_nsyms = osyms ? osyms->nsyms : 0;
2099 while (!done && symnum < lastsym && symnum < nlist_nsyms_global)
2101 read_one_sym (ms, &sub_sym, &sub_aux);
2103 name = EXTERNAL_NAME (name, objfile->obfd);
2105 switch (ms->c_sclass)
2108 sym = (struct symbol *) obstack_alloc
2109 (&objfile->objfile_obstack, sizeof (struct symbol));
2110 memset (sym, 0, sizeof (struct symbol));
2112 SYMBOL_SET_LINKAGE_NAME (sym,
2113 obsavestring (name, strlen (name),
2114 &objfile->objfile_obstack));
2115 SYMBOL_CLASS (sym) = LOC_CONST;
2116 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
2117 SYMBOL_VALUE (sym) = ms->c_value;
2118 add_symbol_to_list (sym, symlist);
2123 /* Sometimes the linker (on 386/ix 2.0.2 at least) screws
2124 up the count of how many symbols to read. So stop
2131 /* Now fill in the fields of the type-structure. */
2134 TYPE_LENGTH (type) = length;
2135 else /* Assume ints. */
2136 TYPE_LENGTH (type) = gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT;
2137 TYPE_CODE (type) = TYPE_CODE_ENUM;
2138 TYPE_NFIELDS (type) = nsyms;
2139 TYPE_FIELDS (type) = (struct field *)
2140 TYPE_ALLOC (type, sizeof (struct field) * nsyms);
2142 /* Find the symbols for the values and put them into the type.
2143 The symbols can be found in the symlist that we put them on
2144 to cause them to be defined. osyms contains the old value
2145 of that symlist; everything up to there was defined by us. */
2146 /* Note that we preserve the order of the enum constants, so
2147 that in something like "enum {FOO, LAST_THING=FOO}" we print
2148 FOO, not LAST_THING. */
2150 for (syms = *symlist, n = 0; syms; syms = syms->next)
2156 for (; j < syms->nsyms; j++, n++)
2158 struct symbol *xsym = syms->symbol[j];
2160 SYMBOL_TYPE (xsym) = type;
2161 TYPE_FIELD_NAME (type, n) = SYMBOL_LINKAGE_NAME (xsym);
2162 SET_FIELD_BITPOS (TYPE_FIELD (type, n), SYMBOL_VALUE (xsym));
2163 if (SYMBOL_VALUE (xsym) < 0)
2165 TYPE_FIELD_BITSIZE (type, n) = 0;
2172 TYPE_UNSIGNED (type) = 1;
2177 /* Register our ability to parse symbols for coff BFD files. */
2179 static const struct sym_fns coff_sym_fns =
2181 bfd_target_coff_flavour,
2182 coff_new_init, /* sym_new_init: init anything gbl to
2184 coff_symfile_init, /* sym_init: read initial info, setup
2186 coff_symfile_read, /* sym_read: read a symbol file into
2188 coff_symfile_finish, /* sym_finish: finished with file,
2190 default_symfile_offsets, /* sym_offsets: xlate external to
2192 default_symfile_segments, /* sym_segments: Get segment
2193 information from a file */
2194 NULL, /* sym_read_linetable */
2196 default_symfile_relocate, /* sym_relocate: Relocate a debug
2202 _initialize_coffread (void)
2204 add_symtab_fns (&coff_sym_fns);