1 /* Read coff symbol tables and convert to internal format, for GDB.
2 Copyright 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
3 1997, 1998, 1999, 2000, 2001, 2002, 2003
4 Free Software Foundation, Inc.
5 Contributed by David D. Johnson, Brown University (ddj@cs.brown.edu).
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 2 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, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
28 #include "breakpoint.h"
31 #include "gdb_obstack.h"
33 #include "gdb_string.h"
36 #include "coff/internal.h" /* Internal format of COFF symbols in BFD */
37 #include "libcoff.h" /* FIXME secret internal data from BFD */
42 #include "gdb-stabs.h"
43 #include "stabsread.h"
44 #include "complaints.h"
46 #include "gdb_assert.h"
49 #include "coff-pe-read.h"
51 extern void _initialize_coffread (void);
53 struct coff_symfile_info
55 file_ptr min_lineno_offset; /* Where in file lowest line#s are */
56 file_ptr max_lineno_offset; /* 1+last byte of line#s in file */
58 CORE_ADDR textaddr; /* Addr of .text section. */
59 unsigned int textsize; /* Size of .text section. */
60 struct stab_section_list *stabsects; /* .stab sections. */
61 asection *stabstrsect; /* Section pointer for .stab section */
65 /* Translate an external name string into a user-visible name. */
66 #define EXTERNAL_NAME(string, abfd) \
67 (string[0] == bfd_get_symbol_leading_char(abfd)? 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 auxents. */
91 static char *temp_sym;
92 static char *temp_aux;
94 /* Local variables that hold the shift and mask values for the
95 COFF file that we are currently reading. These come back to us
96 from BFD, and are referenced by their macro names, as well as
97 internally to the BTYPE, ISPTR, ISFCN, ISARY, ISTAG, and DECREF
98 macros from include/coff/internal.h . */
100 static unsigned local_n_btmask;
101 static unsigned local_n_btshft;
102 static unsigned local_n_tmask;
103 static unsigned local_n_tshift;
105 #define N_BTMASK local_n_btmask
106 #define N_BTSHFT local_n_btshft
107 #define N_TMASK local_n_tmask
108 #define N_TSHIFT local_n_tshift
110 /* Local variables that hold the sizes in the file of various COFF structures.
111 (We only need to know this to read them from the file -- BFD will then
112 translate the data in them, into `internal_xxx' structs in the right
113 byte order, alignment, etc.) */
115 static unsigned local_linesz;
116 static unsigned local_symesz;
117 static unsigned local_auxesz;
119 /* This is set if this is a PE format file. */
123 /* Chain of typedefs of pointers to empty struct/union types.
124 They are chained thru the SYMBOL_VALUE_CHAIN. */
126 static struct symbol *opaque_type_chain[HASHSIZE];
128 /* Simplified internal version of coff symbol table information */
133 int c_symnum; /* symbol number of this entry */
134 int c_naux; /* 0 if syment only, 1 if syment + auxent, etc */
141 extern void stabsread_clear_cache (void);
143 static struct type *coff_read_struct_type (int, int, int);
145 static struct type *decode_base_type (struct coff_symbol *,
146 unsigned int, union internal_auxent *);
148 static struct type *decode_type (struct coff_symbol *, unsigned int,
149 union internal_auxent *);
151 static struct type *decode_function_type (struct coff_symbol *,
153 union internal_auxent *);
155 static struct type *coff_read_enum_type (int, int, int);
157 static struct symbol *process_coff_symbol (struct coff_symbol *,
158 union internal_auxent *,
161 static void patch_opaque_types (struct symtab *);
163 static void enter_linenos (long, int, int, struct objfile *);
165 static void free_linetab (void);
167 static void free_linetab_cleanup (void *ignore);
169 static int init_lineno (bfd *, long, int);
171 static char *getsymname (struct internal_syment *);
173 static char *coff_getfilename (union internal_auxent *);
175 static void free_stringtab (void);
177 static void free_stringtab_cleanup (void *ignore);
179 static int init_stringtab (bfd *, long);
181 static void read_one_sym (struct coff_symbol *,
182 struct internal_syment *, union internal_auxent *);
184 static void coff_symtab_read (long, unsigned int, struct objfile *);
186 /* We are called once per section from coff_symfile_read. We
187 need to examine each section we are passed, check to see
188 if it is something we are interested in processing, and
189 if so, stash away some access information for the section.
191 FIXME: The section names should not be hardwired strings (what
192 should they be? I don't think most object file formats have enough
193 section flags to specify what kind of debug section it is
197 coff_locate_sections (bfd *abfd, asection *sectp, void *csip)
199 register struct coff_symfile_info *csi;
202 csi = (struct coff_symfile_info *) csip;
203 name = bfd_get_section_name (abfd, sectp);
204 if (STREQ (name, ".text"))
206 csi->textaddr = bfd_section_vma (abfd, sectp);
207 csi->textsize += bfd_section_size (abfd, sectp);
209 else if (strncmp (name, ".text", sizeof ".text" - 1) == 0)
211 csi->textsize += bfd_section_size (abfd, sectp);
213 else if (STREQ (name, ".stabstr"))
215 csi->stabstrsect = sectp;
217 else if (strncmp (name, ".stab", sizeof ".stab" - 1) == 0)
221 /* We can have multiple .stab sections if linked with
223 for (s = name + sizeof ".stab" - 1; *s != '\0'; s++)
228 struct stab_section_list *n, **pn;
230 n = ((struct stab_section_list *)
231 xmalloc (sizeof (struct stab_section_list)));
234 for (pn = &csi->stabsects; *pn != NULL; pn = &(*pn)->next)
238 /* This will be run after coffstab_build_psymtabs is called
239 in coff_symfile_read, at which point we no longer need
241 make_cleanup (xfree, n);
246 /* Return the section_offsets* that CS points to. */
247 static int cs_to_section (struct coff_symbol *, struct objfile *);
249 struct find_targ_sec_arg
256 find_targ_sec (bfd *abfd, asection *sect, void *obj)
258 struct find_targ_sec_arg *args = (struct find_targ_sec_arg *) obj;
259 if (sect->target_index == args->targ_index)
260 *args->resultp = sect;
263 /* Return the section number (SECT_OFF_*) that CS points to. */
265 cs_to_section (struct coff_symbol *cs, struct objfile *objfile)
267 asection *sect = NULL;
268 struct find_targ_sec_arg args;
269 int off = SECT_OFF_TEXT (objfile);
271 args.targ_index = cs->c_secnum;
272 args.resultp = §
273 bfd_map_over_sections (objfile->obfd, find_targ_sec, &args);
276 /* This is the section. Figure out what SECT_OFF_* code it is. */
277 if (bfd_get_section_flags (abfd, sect) & SEC_CODE)
278 off = SECT_OFF_TEXT (objfile);
279 else if (bfd_get_section_flags (abfd, sect) & SEC_LOAD)
280 off = SECT_OFF_DATA (objfile);
282 /* Just return the bfd section index. */
288 /* Return the address of the section of a COFF symbol. */
290 static CORE_ADDR cs_section_address (struct coff_symbol *, bfd *);
293 cs_section_address (struct coff_symbol *cs, bfd *abfd)
295 asection *sect = NULL;
296 struct find_targ_sec_arg args;
299 args.targ_index = cs->c_secnum;
300 args.resultp = §
301 bfd_map_over_sections (abfd, find_targ_sec, &args);
303 addr = bfd_get_section_vma (objfile->obfd, sect);
307 /* Look up a coff type-number index. Return the address of the slot
308 where the type for that index is stored.
309 The type-number is in INDEX.
311 This can be used for finding the type associated with that index
312 or for associating a new type with the index. */
314 static struct type **
315 coff_lookup_type (register int index)
317 if (index >= type_vector_length)
319 int old_vector_length = type_vector_length;
321 type_vector_length *= 2;
322 if (index /* is still */ >= type_vector_length)
323 type_vector_length = index * 2;
325 type_vector = (struct type **)
326 xrealloc ((char *) type_vector,
327 type_vector_length * sizeof (struct type *));
328 memset (&type_vector[old_vector_length], 0,
329 (type_vector_length - old_vector_length) * sizeof (struct type *));
331 return &type_vector[index];
334 /* Make sure there is a type allocated for type number index
335 and return the type object.
336 This can create an empty (zeroed) type object. */
339 coff_alloc_type (int index)
341 register struct type **type_addr = coff_lookup_type (index);
342 register struct type *type = *type_addr;
344 /* If we are referring to a type not known at all yet,
345 allocate an empty type for it.
346 We will fill it in later if we find out how. */
349 type = alloc_type (current_objfile);
355 /* Start a new symtab for a new source file.
356 This is called when a COFF ".file" symbol is seen;
357 it indicates the start of data for one original source file. */
360 coff_start_symtab (char *name)
363 /* We fill in the filename later. start_symtab puts
364 this pointer into last_source_file and we put it in
365 subfiles->name, which end_symtab frees; that's why
366 it must be malloc'd. */
367 savestring (name, strlen (name)),
368 /* We never know the directory name for COFF. */
370 /* The start address is irrelevant, since we set
371 last_source_start_addr in coff_end_symtab. */
373 record_debugformat ("COFF");
376 /* Save the vital information from when starting to read a file,
377 for use when closing off the current file.
378 NAME is the file name the symbols came from, START_ADDR is the first
379 text address for the file, and SIZE is the number of bytes of text. */
382 complete_symtab (char *name, CORE_ADDR start_addr, unsigned int size)
384 if (last_source_file != NULL)
385 xfree (last_source_file);
386 last_source_file = savestring (name, strlen (name));
387 current_source_start_addr = start_addr;
388 current_source_end_addr = start_addr + size;
390 if (current_objfile->ei.entry_point >= current_source_start_addr &&
391 current_objfile->ei.entry_point < current_source_end_addr)
393 current_objfile->ei.entry_file_lowpc = current_source_start_addr;
394 current_objfile->ei.entry_file_highpc = current_source_end_addr;
398 /* Finish the symbol definitions for one main source file,
399 close off all the lexical contexts for that file
400 (creating struct block's for them), then make the
401 struct symtab for that file and put it in the list of all such. */
404 coff_end_symtab (struct objfile *objfile)
406 struct symtab *symtab;
408 last_source_start_addr = current_source_start_addr;
410 symtab = end_symtab (current_source_end_addr, objfile, SECT_OFF_TEXT (objfile));
413 free_named_symtabs (symtab->filename);
415 /* Reinitialize for beginning of new file. */
416 last_source_file = NULL;
420 record_minimal_symbol (char *name, CORE_ADDR address,
421 enum minimal_symbol_type type, struct objfile *objfile)
423 /* We don't want TDESC entry points in the minimal symbol table */
427 prim_record_minimal_symbol (name, address, type, objfile);
430 /* coff_symfile_init ()
431 is the coff-specific initialization routine for reading symbols.
432 It is passed a struct objfile which contains, among other things,
433 the BFD for the file whose symbols are being read, and a slot for
434 a pointer to "private data" which we fill with cookies and other
435 treats for coff_symfile_read ().
437 We will only be called if this is a COFF or COFF-like file.
438 BFD handles figuring out the format of the file, and code in symtab.c
439 uses BFD's determination to vector to us.
441 The ultimate result is a new symtab (or, FIXME, eventually a psymtab). */
444 coff_symfile_init (struct objfile *objfile)
446 /* Allocate struct to keep track of stab reading. */
447 objfile->sym_stab_info = (struct dbx_symfile_info *)
448 xmmalloc (objfile->md, sizeof (struct dbx_symfile_info));
450 memset (objfile->sym_stab_info, 0,
451 sizeof (struct dbx_symfile_info));
453 /* Allocate struct to keep track of the symfile */
454 objfile->sym_private = xmmalloc (objfile->md,
455 sizeof (struct coff_symfile_info));
457 memset (objfile->sym_private, 0, sizeof (struct coff_symfile_info));
459 /* COFF objects may be reordered, so set OBJF_REORDERED. If we
460 find this causes a significant slowdown in gdb then we could
461 set it in the debug symbol readers only when necessary. */
462 objfile->flags |= OBJF_REORDERED;
464 init_entry_point_info (objfile);
467 /* This function is called for every section; it finds the outer limits
468 of the line table (minimum and maximum file offset) so that the
469 mainline code can read the whole thing for efficiency. */
473 find_linenos (bfd *abfd, sec_ptr asect, void *vpinfo)
475 struct coff_symfile_info *info;
477 file_ptr offset, maxoff;
479 /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */
480 count = asect->lineno_count;
485 size = count * local_linesz;
487 info = (struct coff_symfile_info *) vpinfo;
488 /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */
489 offset = asect->line_filepos;
492 if (offset < info->min_lineno_offset || info->min_lineno_offset == 0)
493 info->min_lineno_offset = offset;
495 maxoff = offset + size;
496 if (maxoff > info->max_lineno_offset)
497 info->max_lineno_offset = maxoff;
501 /* The BFD for this file -- only good while we're actively reading
502 symbols into a psymtab or a symtab. */
504 static bfd *symfile_bfd;
506 /* Read a symbol file, after initialization by coff_symfile_init. */
510 coff_symfile_read (struct objfile *objfile, int mainline)
512 struct coff_symfile_info *info;
513 struct dbx_symfile_info *dbxinfo;
514 bfd *abfd = objfile->obfd;
515 coff_data_type *cdata = coff_data (abfd);
516 char *name = bfd_get_filename (abfd);
518 unsigned int num_symbols;
520 int stringtab_offset;
521 struct cleanup *back_to, *cleanup_minimal_symbols;
526 info = (struct coff_symfile_info *) objfile->sym_private;
527 dbxinfo = objfile->sym_stab_info;
528 symfile_bfd = abfd; /* Kludge for swap routines */
530 /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */
531 num_symbols = bfd_get_symcount (abfd); /* How many syms */
532 symtab_offset = cdata->sym_filepos; /* Symbol table file offset */
533 stringtab_offset = symtab_offset + /* String table file offset */
534 num_symbols * cdata->local_symesz;
536 /* Set a few file-statics that give us specific information about
537 the particular COFF file format we're reading. */
538 local_n_btmask = cdata->local_n_btmask;
539 local_n_btshft = cdata->local_n_btshft;
540 local_n_tmask = cdata->local_n_tmask;
541 local_n_tshift = cdata->local_n_tshift;
542 local_linesz = cdata->local_linesz;
543 local_symesz = cdata->local_symesz;
544 local_auxesz = cdata->local_auxesz;
546 /* Allocate space for raw symbol and aux entries, based on their
547 space requirements as reported by BFD. */
548 temp_sym = (char *) xmalloc
549 (cdata->local_symesz + cdata->local_auxesz);
550 temp_aux = temp_sym + cdata->local_symesz;
551 back_to = make_cleanup (free_current_contents, &temp_sym);
553 /* We need to know whether this is a PE file, because in PE files,
554 unlike standard COFF files, symbol values are stored as offsets
555 from the section address, rather than as absolute addresses.
556 FIXME: We should use BFD to read the symbol table, and thus avoid
559 strncmp (bfd_get_target (objfile->obfd), "pe", 2) == 0
560 || strncmp (bfd_get_target (objfile->obfd), "epoc-pe", 7) == 0;
564 info->min_lineno_offset = 0;
565 info->max_lineno_offset = 0;
567 /* Only read line number information if we have symbols.
569 On Windows NT, some of the system's DLL's have sections with
570 PointerToLinenumbers fields that are non-zero, but point at
571 random places within the image file. (In the case I found,
572 KERNEL32.DLL's .text section has a line number info pointer that
573 points into the middle of the string `lib\\i386\kernel32.dll'.)
575 However, these DLL's also have no symbols. The line number
576 tables are meaningless without symbols. And in fact, GDB never
577 uses the line number information unless there are symbols. So we
578 can avoid spurious error messages (and maybe run a little
579 faster!) by not even reading the line number table unless we have
583 /* Read the line number table, all at once. */
584 bfd_map_over_sections (abfd, find_linenos, (void *) info);
586 make_cleanup (free_linetab_cleanup, 0 /*ignore*/);
587 val = init_lineno (abfd, info->min_lineno_offset,
588 info->max_lineno_offset - info->min_lineno_offset);
590 error ("\"%s\": error reading line numbers\n", name);
593 /* Now read the string table, all at once. */
595 make_cleanup (free_stringtab_cleanup, 0 /*ignore*/);
596 val = init_stringtab (abfd, stringtab_offset);
598 error ("\"%s\": can't get string table", name);
600 init_minimal_symbol_collection ();
601 cleanup_minimal_symbols = make_cleanup_discard_minimal_symbols ();
603 /* Now that the executable file is positioned at symbol table,
604 process it and define symbols accordingly. */
606 coff_symtab_read ((long) symtab_offset, num_symbols, objfile);
608 /* Install any minimal symbols that have been collected as the current
609 minimal symbols for this objfile. */
611 install_minimal_symbols (objfile);
613 /* Free the installed minimal symbol data. */
614 do_cleanups (cleanup_minimal_symbols);
616 bfd_map_over_sections (abfd, coff_locate_sections, (void *) info);
620 if (!info->stabstrsect)
622 error (("The debugging information in `%s' is corrupted.\n"
623 "The file has a `.stabs' section, but no `.stabstr' "
628 /* FIXME: dubious. Why can't we use something normal like
629 bfd_get_section_contents? */
630 bfd_seek (abfd, abfd->where, 0);
632 stabstrsize = bfd_section_size (abfd, info->stabstrsect);
634 coffstab_build_psymtabs (objfile,
636 info->textaddr, info->textsize,
638 info->stabstrsect->filepos, stabstrsize);
640 if (dwarf2_has_info (abfd))
642 /* DWARF2 sections. */
643 dwarf2_build_psymtabs (objfile, mainline);
646 do_cleanups (back_to);
650 coff_new_init (struct objfile *ignore)
654 /* Perform any local cleanups required when we are done with a particular
655 objfile. I.E, we are in the process of discarding all symbol information
656 for an objfile, freeing up all memory held for it, and unlinking the
657 objfile struct from the global list of known objfiles. */
660 coff_symfile_finish (struct objfile *objfile)
662 if (objfile->sym_private != NULL)
664 xmfree (objfile->md, objfile->sym_private);
667 /* Let stabs reader clean up */
668 stabsread_clear_cache ();
672 /* Given pointers to a symbol table in coff style exec file,
673 analyze them and create struct symtab's describing the symbols.
674 NSYMS is the number of symbols in the symbol table.
675 We read them one at a time using read_one_sym (). */
678 coff_symtab_read (long symtab_offset, unsigned int nsyms,
679 struct objfile *objfile)
681 register struct context_stack *new;
682 struct coff_symbol coff_symbol;
683 register struct coff_symbol *cs = &coff_symbol;
684 static struct internal_syment main_sym;
685 static union internal_auxent main_aux;
686 struct coff_symbol fcn_cs_saved;
687 static struct internal_syment fcn_sym_saved;
688 static union internal_auxent fcn_aux_saved;
690 /* A .file is open. */
691 int in_source_file = 0;
692 int next_file_symnum = -1;
693 /* Name of the current file. */
694 char *filestring = "";
696 int fcn_first_line = 0;
697 CORE_ADDR fcn_first_line_addr = 0;
698 int fcn_last_line = 0;
699 int fcn_start_addr = 0;
700 long fcn_line_ptr = 0;
704 /* Work around a stdio bug in SunOS4.1.1 (this makes me nervous....
705 it's hard to know I've really worked around it. The fix should be
706 harmless, anyway). The symptom of the bug is that the first
707 fread (in read_one_sym), will (in my example) actually get data
708 from file offset 268, when the fseek was to 264 (and ftell shows
709 264). This causes all hell to break loose. I was unable to
710 reproduce this on a short test program which operated on the same
711 file, performing (I think) the same sequence of operations.
713 It stopped happening when I put in this (former) rewind().
715 FIXME: Find out if this has been reported to Sun, whether it has
716 been fixed in a later release, etc. */
718 bfd_seek (objfile->obfd, 0, 0);
720 /* Position to read the symbol table. */
721 val = bfd_seek (objfile->obfd, (long) symtab_offset, 0);
723 perror_with_name (objfile->name);
725 current_objfile = objfile;
726 nlist_bfd_global = objfile->obfd;
727 nlist_nsyms_global = nsyms;
728 last_source_file = NULL;
729 memset (opaque_type_chain, 0, sizeof opaque_type_chain);
731 if (type_vector) /* Get rid of previous one */
733 type_vector_length = 160;
734 type_vector = (struct type **)
735 xmalloc (type_vector_length * sizeof (struct type *));
736 memset (type_vector, 0, type_vector_length * sizeof (struct type *));
738 coff_start_symtab ("");
741 while (symnum < nsyms)
743 QUIT; /* Make this command interruptable. */
745 read_one_sym (cs, &main_sym, &main_aux);
747 if (cs->c_symnum == next_file_symnum && cs->c_sclass != C_FILE)
749 if (last_source_file)
750 coff_end_symtab (objfile);
752 coff_start_symtab ("_globals_");
753 complete_symtab ("_globals_", 0, 0);
754 /* done with all files, everything from here on out is globals */
757 /* Special case for file with type declarations only, no text. */
758 if (!last_source_file && SDB_TYPE (cs->c_type)
759 && cs->c_secnum == N_DEBUG)
760 complete_symtab (filestring, 0, 0);
762 /* Typedefs should not be treated as symbol definitions. */
763 if (ISFCN (cs->c_type) && cs->c_sclass != C_TPDEF)
765 /* Record all functions -- external and static -- in minsyms. */
766 tmpaddr = cs->c_value + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
767 record_minimal_symbol (cs->c_name, tmpaddr, mst_text, objfile);
769 fcn_line_ptr = main_aux.x_sym.x_fcnary.x_fcn.x_lnnoptr;
770 fcn_start_addr = tmpaddr;
772 fcn_sym_saved = main_sym;
773 fcn_aux_saved = main_aux;
777 switch (cs->c_sclass)
786 complaint (&symfile_complaints, "Bad n_sclass for symbol %s",
791 /* c_value field contains symnum of next .file entry in table
792 or symnum of first global after last .file. */
793 next_file_symnum = cs->c_value;
795 filestring = coff_getfilename (&main_aux);
799 /* Complete symbol table for last object file
800 containing debugging information. */
801 if (last_source_file)
803 coff_end_symtab (objfile);
804 coff_start_symtab (filestring);
809 /* C_LABEL is used for labels and static functions. Including
810 it here allows gdb to see static functions when no debug
811 info is available. */
813 /* However, labels within a function can make weird backtraces,
814 so filter them out (from phdm@macqel.be). */
820 case C_THUMBSTATFUNC:
821 if (cs->c_name[0] == '.')
823 if (STREQ (cs->c_name, ".text"))
825 /* FIXME: don't wire in ".text" as section name
827 /* Check for in_source_file deals with case of
828 a file with debugging symbols
829 followed by a later file with no symbols. */
831 complete_symtab (filestring,
832 cs->c_value + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)),
833 main_aux.x_scn.x_scnlen);
836 /* flush rest of '.' symbols */
839 else if (!SDB_TYPE (cs->c_type)
840 && cs->c_name[0] == 'L'
841 && (strncmp (cs->c_name, "LI%", 3) == 0
842 || strncmp (cs->c_name, "LF%", 3) == 0
843 || strncmp (cs->c_name, "LC%", 3) == 0
844 || strncmp (cs->c_name, "LP%", 3) == 0
845 || strncmp (cs->c_name, "LPB%", 4) == 0
846 || strncmp (cs->c_name, "LBB%", 4) == 0
847 || strncmp (cs->c_name, "LBE%", 4) == 0
848 || strncmp (cs->c_name, "LPBX%", 5) == 0))
849 /* At least on a 3b1, gcc generates swbeg and string labels
850 that look like this. Ignore them. */
852 /* fall in for static symbols that don't start with '.' */
857 /* Record it in the minimal symbols regardless of
858 SDB_TYPE. This parallels what we do for other debug
859 formats, and probably is needed to make
860 print_address_symbolic work right without the (now
861 gone) "set fast-symbolic-addr off" kludge. */
863 enum minimal_symbol_type ms_type;
866 if (cs->c_secnum == N_UNDEF)
868 /* This is a common symbol. See if the target
869 environment knows where it has been relocated to. */
871 if (target_lookup_symbol (cs->c_name, &reladdr))
873 /* Error in lookup; ignore symbol. */
877 /* The address has already been relocated; make sure that
878 objfile_relocate doesn't relocate it again. */
880 ms_type = cs->c_sclass == C_EXT
881 || cs->c_sclass == C_THUMBEXT ?
882 mst_bss : mst_file_bss;
884 else if (cs->c_secnum == N_ABS)
886 /* Use the correct minimal symbol type (and don't
887 relocate) for absolute values. */
889 sec = cs_to_section (cs, objfile);
890 tmpaddr = cs->c_value;
894 sec = cs_to_section (cs, objfile);
895 tmpaddr = cs->c_value;
896 /* Statics in a PE file also get relocated */
897 if (cs->c_sclass == C_EXT
898 || cs->c_sclass == C_THUMBEXTFUNC
899 || cs->c_sclass == C_THUMBEXT
900 || (pe_file && (cs->c_sclass == C_STAT)))
901 tmpaddr += ANOFFSET (objfile->section_offsets, sec);
903 if (sec == SECT_OFF_TEXT (objfile))
906 cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXTFUNC
907 || cs->c_sclass == C_THUMBEXT ?
908 mst_text : mst_file_text;
909 tmpaddr = SMASH_TEXT_ADDRESS (tmpaddr);
911 else if (sec == SECT_OFF_DATA (objfile))
914 cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXT ?
915 mst_data : mst_file_data;
917 else if (sec == SECT_OFF_BSS (objfile))
920 cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXT ?
921 mst_data : mst_file_data;
924 ms_type = mst_unknown;
927 if (cs->c_name[0] != '@' /* Skip tdesc symbols */ )
929 struct minimal_symbol *msym;
931 /* FIXME: cagney/2001-02-01: The nasty (int) -> (long)
932 -> (void*) cast is to ensure that that the value of
933 cs->c_sclass can be correctly stored in a void
934 pointer in MSYMBOL_INFO. Better solutions
936 gdb_assert (sizeof (void *) >= sizeof (cs->c_sclass));
937 msym = prim_record_minimal_symbol_and_info
938 (cs->c_name, tmpaddr, ms_type, (void *) (long) cs->c_sclass,
941 COFF_MAKE_MSYMBOL_SPECIAL (cs->c_sclass, msym);
943 if (SDB_TYPE (cs->c_type))
946 sym = process_coff_symbol
947 (cs, &main_aux, objfile);
948 SYMBOL_VALUE (sym) = tmpaddr;
949 SYMBOL_SECTION (sym) = sec;
955 if (STREQ (cs->c_name, ".bf"))
959 /* value contains address of first non-init type code */
960 /* main_aux.x_sym.x_misc.x_lnsz.x_lnno
961 contains line number of '{' } */
963 complaint (&symfile_complaints,
964 "`.bf' symbol %d has no aux entry", cs->c_symnum);
965 fcn_first_line = main_aux.x_sym.x_misc.x_lnsz.x_lnno;
966 fcn_first_line_addr = cs->c_value;
968 /* Might want to check that locals are 0 and
969 context_stack_depth is zero, and complain if not. */
972 new = push_context (depth, fcn_start_addr);
973 fcn_cs_saved.c_name = getsymname (&fcn_sym_saved);
975 process_coff_symbol (&fcn_cs_saved, &fcn_aux_saved, objfile);
977 else if (STREQ (cs->c_name, ".ef"))
979 if (!within_function)
980 error ("Bad coff function information\n");
981 /* the value of .ef is the address of epilogue code;
982 not useful for gdb. */
983 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
984 contains number of lines to '}' */
986 if (context_stack_depth <= 0)
987 { /* We attempted to pop an empty context stack */
988 complaint (&symfile_complaints,
989 "`.ef' symbol without matching `.bf' symbol ignored starting at symnum %d",
995 new = pop_context ();
996 /* Stack must be empty now. */
997 if (context_stack_depth > 0 || new == NULL)
999 complaint (&symfile_complaints,
1000 "Unmatched .ef symbol(s) ignored starting at symnum %d",
1002 within_function = 0;
1005 if (cs->c_naux != 1)
1007 complaint (&symfile_complaints,
1008 "`.ef' symbol %d has no aux entry", cs->c_symnum);
1009 fcn_last_line = 0x7FFFFFFF;
1013 fcn_last_line = main_aux.x_sym.x_misc.x_lnsz.x_lnno;
1015 /* fcn_first_line is the line number of the opening '{'.
1016 Do not record it - because it would affect gdb's idea
1017 of the line number of the first statement of the function -
1018 except for one-line functions, for which it is also the line
1019 number of all the statements and of the closing '}', and
1020 for which we do not have any other statement-line-number. */
1021 if (fcn_last_line == 1)
1022 record_line (current_subfile, fcn_first_line,
1023 fcn_first_line_addr);
1025 enter_linenos (fcn_line_ptr, fcn_first_line, fcn_last_line,
1028 finish_block (new->name, &local_symbols, new->old_blocks,
1030 #if defined (FUNCTION_EPILOGUE_SIZE)
1031 /* This macro should be defined only on
1033 fcn_aux_saved.x_sym.x_misc.x_fsize
1034 field is always zero.
1035 So use the .bf record information that
1036 points to the epilogue and add the size
1039 + FUNCTION_EPILOGUE_SIZE
1040 + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)),
1042 fcn_cs_saved.c_value
1043 + fcn_aux_saved.x_sym.x_misc.x_fsize
1044 + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)),
1048 within_function = 0;
1053 if (STREQ (cs->c_name, ".bb"))
1055 tmpaddr = cs->c_value;
1056 tmpaddr += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
1057 push_context (++depth, tmpaddr);
1059 else if (STREQ (cs->c_name, ".eb"))
1061 if (context_stack_depth <= 0)
1062 { /* We attempted to pop an empty context stack */
1063 complaint (&symfile_complaints,
1064 "`.eb' symbol without matching `.bb' symbol ignored starting at symnum %d",
1069 new = pop_context ();
1070 if (depth-- != new->depth)
1072 complaint (&symfile_complaints,
1073 "Mismatched .eb symbol ignored starting at symnum %d",
1077 if (local_symbols && context_stack_depth > 0)
1080 cs->c_value + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
1081 /* Make a block for the local symbols within. */
1082 finish_block (0, &local_symbols, new->old_blocks,
1083 new->start_addr, tmpaddr, objfile);
1085 /* Now pop locals of block just finished. */
1086 local_symbols = new->locals;
1091 process_coff_symbol (cs, &main_aux, objfile);
1096 if ((nsyms == 0) && (pe_file))
1098 /* We've got no debugging symbols, but it's is a portable
1099 executable, so try to read the export table */
1100 read_pe_exported_syms (objfile);
1103 if (last_source_file)
1104 coff_end_symtab (objfile);
1106 /* Patch up any opaque types (references to types that are not defined
1107 in the file where they are referenced, e.g. "struct foo *bar"). */
1108 ALL_OBJFILE_SYMTABS (objfile, s)
1109 patch_opaque_types (s);
1111 current_objfile = NULL;
1114 /* Routines for reading headers and symbols from executable. */
1116 /* Read the next symbol, swap it, and return it in both internal_syment
1117 form, and coff_symbol form. Also return its first auxent, if any,
1118 in internal_auxent form, and skip any other auxents. */
1121 read_one_sym (register struct coff_symbol *cs,
1122 register struct internal_syment *sym,
1123 register union internal_auxent *aux)
1127 cs->c_symnum = symnum;
1128 bfd_bread (temp_sym, local_symesz, nlist_bfd_global);
1129 bfd_coff_swap_sym_in (symfile_bfd, temp_sym, (char *) sym);
1130 cs->c_naux = sym->n_numaux & 0xff;
1131 if (cs->c_naux >= 1)
1133 bfd_bread (temp_aux, local_auxesz, nlist_bfd_global);
1134 bfd_coff_swap_aux_in (symfile_bfd, temp_aux, sym->n_type, sym->n_sclass,
1135 0, cs->c_naux, (char *) aux);
1136 /* If more than one aux entry, read past it (only the first aux
1138 for (i = 1; i < cs->c_naux; i++)
1139 bfd_bread (temp_aux, local_auxesz, nlist_bfd_global);
1141 cs->c_name = getsymname (sym);
1142 cs->c_value = sym->n_value;
1143 cs->c_sclass = (sym->n_sclass & 0xff);
1144 cs->c_secnum = sym->n_scnum;
1145 cs->c_type = (unsigned) sym->n_type;
1146 if (!SDB_TYPE (cs->c_type))
1150 if (cs->c_sclass & 128)
1151 printf ("thumb symbol %s, class 0x%x\n", cs->c_name, cs->c_sclass);
1154 symnum += 1 + cs->c_naux;
1156 /* The PE file format stores symbol values as offsets within the
1157 section, rather than as absolute addresses. We correct that
1158 here, if the symbol has an appropriate storage class. FIXME: We
1159 should use BFD to read the symbols, rather than duplicating the
1163 switch (cs->c_sclass)
1167 case C_THUMBEXTFUNC:
1172 case C_THUMBSTATFUNC:
1178 if (cs->c_secnum != 0)
1179 cs->c_value += cs_section_address (cs, symfile_bfd);
1185 /* Support for string table handling */
1187 static char *stringtab = NULL;
1190 init_stringtab (bfd *abfd, long offset)
1194 unsigned char lengthbuf[4];
1198 /* If the file is stripped, the offset might be zero, indicating no
1199 string table. Just return with `stringtab' set to null. */
1203 if (bfd_seek (abfd, offset, 0) < 0)
1206 val = bfd_bread ((char *) lengthbuf, sizeof lengthbuf, abfd);
1207 length = bfd_h_get_32 (symfile_bfd, lengthbuf);
1209 /* If no string table is needed, then the file may end immediately
1210 after the symbols. Just return with `stringtab' set to null. */
1211 if (val != sizeof lengthbuf || length < sizeof lengthbuf)
1214 stringtab = (char *) xmalloc (length);
1215 /* This is in target format (probably not very useful, and not currently
1216 used), not host format. */
1217 memcpy (stringtab, lengthbuf, sizeof lengthbuf);
1218 if (length == sizeof length) /* Empty table -- just the count */
1221 val = bfd_bread (stringtab + sizeof lengthbuf, length - sizeof lengthbuf,
1223 if (val != length - sizeof lengthbuf || stringtab[length - 1] != '\0')
1230 free_stringtab (void)
1238 free_stringtab_cleanup (void *ignore)
1244 getsymname (struct internal_syment *symbol_entry)
1246 static char buffer[SYMNMLEN + 1];
1249 if (symbol_entry->_n._n_n._n_zeroes == 0)
1251 /* FIXME: Probably should be detecting corrupt symbol files by
1252 seeing whether offset points to within the stringtab. */
1253 result = stringtab + symbol_entry->_n._n_n._n_offset;
1257 strncpy (buffer, symbol_entry->_n._n_name, SYMNMLEN);
1258 buffer[SYMNMLEN] = '\0';
1264 /* Extract the file name from the aux entry of a C_FILE symbol. Return
1265 only the last component of the name. Result is in static storage and
1266 is only good for temporary use. */
1269 coff_getfilename (union internal_auxent *aux_entry)
1271 static char buffer[BUFSIZ];
1272 register char *temp;
1275 if (aux_entry->x_file.x_n.x_zeroes == 0)
1276 strcpy (buffer, stringtab + aux_entry->x_file.x_n.x_offset);
1279 strncpy (buffer, aux_entry->x_file.x_fname, FILNMLEN);
1280 buffer[FILNMLEN] = '\0';
1284 /* FIXME: We should not be throwing away the information about what
1285 directory. It should go into dirname of the symtab, or some such
1287 if ((temp = strrchr (result, '/')) != NULL)
1292 /* Support for line number handling. */
1294 static char *linetab = NULL;
1295 static long linetab_offset;
1296 static unsigned long linetab_size;
1298 /* Read in all the line numbers for fast lookups later. Leave them in
1299 external (unswapped) format in memory; we'll swap them as we enter
1300 them into GDB's data structures. */
1303 init_lineno (bfd *abfd, long offset, int size)
1307 linetab_offset = offset;
1308 linetab_size = size;
1315 if (bfd_seek (abfd, offset, 0) < 0)
1318 /* Allocate the desired table, plus a sentinel */
1319 linetab = (char *) xmalloc (size + local_linesz);
1321 val = bfd_bread (linetab, size, abfd);
1325 /* Terminate it with an all-zero sentinel record */
1326 memset (linetab + size, 0, local_linesz);
1340 free_linetab_cleanup (void *ignore)
1345 #if !defined (L_LNNO32)
1346 #define L_LNNO32(lp) ((lp)->l_lnno)
1350 enter_linenos (long file_offset, register int first_line,
1351 register int last_line, struct objfile *objfile)
1353 register char *rawptr;
1354 struct internal_lineno lptr;
1358 if (file_offset < linetab_offset)
1360 complaint (&symfile_complaints,
1361 "Line number pointer %ld lower than start of line numbers",
1363 if (file_offset > linetab_size) /* Too big to be an offset? */
1365 file_offset += linetab_offset; /* Try reading at that linetab offset */
1368 rawptr = &linetab[file_offset - linetab_offset];
1370 /* skip first line entry for each function */
1371 rawptr += local_linesz;
1372 /* line numbers start at one for the first line of the function */
1377 bfd_coff_swap_lineno_in (symfile_bfd, rawptr, &lptr);
1378 rawptr += local_linesz;
1379 /* The next function, or the sentinel, will have L_LNNO32 zero; we exit. */
1380 if (L_LNNO32 (&lptr) && L_LNNO32 (&lptr) <= last_line)
1381 record_line (current_subfile, first_line + L_LNNO32 (&lptr),
1383 + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)));
1390 patch_type (struct type *type, struct type *real_type)
1392 register struct type *target = TYPE_TARGET_TYPE (type);
1393 register struct type *real_target = TYPE_TARGET_TYPE (real_type);
1394 int field_size = TYPE_NFIELDS (real_target) * sizeof (struct field);
1396 TYPE_LENGTH (target) = TYPE_LENGTH (real_target);
1397 TYPE_NFIELDS (target) = TYPE_NFIELDS (real_target);
1398 TYPE_FIELDS (target) = (struct field *) TYPE_ALLOC (target, field_size);
1400 memcpy (TYPE_FIELDS (target), TYPE_FIELDS (real_target), field_size);
1402 if (TYPE_NAME (real_target))
1404 if (TYPE_NAME (target))
1405 xfree (TYPE_NAME (target));
1406 TYPE_NAME (target) = concat (TYPE_NAME (real_target), NULL);
1410 /* Patch up all appropriate typedef symbols in the opaque_type_chains
1411 so that they can be used to print out opaque data structures properly. */
1414 patch_opaque_types (struct symtab *s)
1416 register struct block *b;
1418 register struct symbol *real_sym;
1420 /* Go through the per-file symbols only */
1421 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK);
1422 ALL_BLOCK_SYMBOLS (b, i, real_sym)
1424 /* Find completed typedefs to use to fix opaque ones.
1425 Remove syms from the chain when their types are stored,
1426 but search the whole chain, as there may be several syms
1427 from different files with the same name. */
1428 if (SYMBOL_CLASS (real_sym) == LOC_TYPEDEF &&
1429 SYMBOL_DOMAIN (real_sym) == VAR_DOMAIN &&
1430 TYPE_CODE (SYMBOL_TYPE (real_sym)) == TYPE_CODE_PTR &&
1431 TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (real_sym))) != 0)
1433 register char *name = DEPRECATED_SYMBOL_NAME (real_sym);
1434 register int hash = hashname (name);
1435 register struct symbol *sym, *prev;
1438 for (sym = opaque_type_chain[hash]; sym;)
1440 if (name[0] == DEPRECATED_SYMBOL_NAME (sym)[0] &&
1441 STREQ (name + 1, DEPRECATED_SYMBOL_NAME (sym) + 1))
1445 SYMBOL_VALUE_CHAIN (prev) = SYMBOL_VALUE_CHAIN (sym);
1449 opaque_type_chain[hash] = SYMBOL_VALUE_CHAIN (sym);
1452 patch_type (SYMBOL_TYPE (sym), SYMBOL_TYPE (real_sym));
1456 sym = SYMBOL_VALUE_CHAIN (prev);
1460 sym = opaque_type_chain[hash];
1466 sym = SYMBOL_VALUE_CHAIN (sym);
1473 static struct symbol *
1474 process_coff_symbol (register struct coff_symbol *cs,
1475 register union internal_auxent *aux,
1476 struct objfile *objfile)
1478 register struct symbol *sym
1479 = (struct symbol *) obstack_alloc (&objfile->symbol_obstack,
1480 sizeof (struct symbol));
1483 memset (sym, 0, sizeof (struct symbol));
1485 name = EXTERNAL_NAME (name, objfile->obfd);
1486 SYMBOL_LANGUAGE (sym) = language_auto;
1487 SYMBOL_SET_NAMES (sym, name, strlen (name), objfile);
1489 /* default assumptions */
1490 SYMBOL_VALUE (sym) = cs->c_value;
1491 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1492 SYMBOL_SECTION (sym) = cs_to_section (cs, objfile);
1494 if (ISFCN (cs->c_type))
1496 SYMBOL_VALUE (sym) += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
1498 lookup_function_type (decode_function_type (cs, cs->c_type, aux));
1500 SYMBOL_CLASS (sym) = LOC_BLOCK;
1501 if (cs->c_sclass == C_STAT || cs->c_sclass == C_THUMBSTAT
1502 || cs->c_sclass == C_THUMBSTATFUNC)
1503 add_symbol_to_list (sym, &file_symbols);
1504 else if (cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXT
1505 || cs->c_sclass == C_THUMBEXTFUNC)
1506 add_symbol_to_list (sym, &global_symbols);
1510 SYMBOL_TYPE (sym) = decode_type (cs, cs->c_type, aux);
1511 switch (cs->c_sclass)
1517 SYMBOL_CLASS (sym) = LOC_LOCAL;
1518 add_symbol_to_list (sym, &local_symbols);
1522 case C_THUMBEXTFUNC:
1524 SYMBOL_CLASS (sym) = LOC_STATIC;
1525 SYMBOL_VALUE_ADDRESS (sym) = (CORE_ADDR) cs->c_value;
1526 SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
1527 add_symbol_to_list (sym, &global_symbols);
1531 case C_THUMBSTATFUNC:
1533 SYMBOL_CLASS (sym) = LOC_STATIC;
1534 SYMBOL_VALUE_ADDRESS (sym) = (CORE_ADDR) cs->c_value;
1535 SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
1536 if (within_function)
1538 /* Static symbol of local scope */
1539 add_symbol_to_list (sym, &local_symbols);
1543 /* Static symbol at top level of file */
1544 add_symbol_to_list (sym, &file_symbols);
1548 #ifdef C_GLBLREG /* AMD coff */
1552 SYMBOL_CLASS (sym) = LOC_REGISTER;
1553 SYMBOL_VALUE (sym) = SDB_REG_TO_REGNUM (cs->c_value);
1554 add_symbol_to_list (sym, &local_symbols);
1562 SYMBOL_CLASS (sym) = LOC_ARG;
1563 add_symbol_to_list (sym, &local_symbols);
1564 #if !defined (BELIEVE_PCC_PROMOTION)
1565 if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
1567 /* If PCC says a parameter is a short or a char,
1568 aligned on an int boundary, realign it to the
1569 "little end" of the int. */
1570 struct type *temptype;
1571 temptype = lookup_fundamental_type (current_objfile,
1573 if (TYPE_LENGTH (SYMBOL_TYPE (sym)) < TYPE_LENGTH (temptype)
1574 && TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT
1575 && 0 == SYMBOL_VALUE (sym) % TYPE_LENGTH (temptype))
1577 SYMBOL_VALUE (sym) +=
1578 TYPE_LENGTH (temptype)
1579 - TYPE_LENGTH (SYMBOL_TYPE (sym));
1586 SYMBOL_CLASS (sym) = LOC_REGPARM;
1587 SYMBOL_VALUE (sym) = SDB_REG_TO_REGNUM (cs->c_value);
1588 add_symbol_to_list (sym, &local_symbols);
1589 #if !defined (BELIEVE_PCC_PROMOTION)
1590 /* FIXME: This should retain the current type, since it's just
1591 a register value. gnu@adobe, 26Feb93 */
1593 /* If PCC says a parameter is a short or a char,
1594 it is really an int. */
1595 struct type *temptype;
1597 lookup_fundamental_type (current_objfile, FT_INTEGER);
1598 if (TYPE_LENGTH (SYMBOL_TYPE (sym)) < TYPE_LENGTH (temptype)
1599 && TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT)
1602 (TYPE_UNSIGNED (SYMBOL_TYPE (sym))
1603 ? lookup_fundamental_type (current_objfile,
1604 FT_UNSIGNED_INTEGER)
1612 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
1613 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1615 /* If type has no name, give it one */
1616 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
1618 if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR
1619 || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_FUNC)
1621 /* If we are giving a name to a type such as "pointer to
1622 foo" or "function returning foo", we better not set
1623 the TYPE_NAME. If the program contains "typedef char
1624 *caddr_t;", we don't want all variables of type char
1625 * to print as caddr_t. This is not just a
1626 consequence of GDB's type management; CC and GCC (at
1627 least through version 2.4) both output variables of
1628 either type char * or caddr_t with the type
1629 refering to the C_TPDEF symbol for caddr_t. If a future
1630 compiler cleans this up it GDB is not ready for it
1631 yet, but if it becomes ready we somehow need to
1632 disable this check (without breaking the PCC/GCC2.4
1637 Fortunately, this check seems not to be necessary
1638 for anything except pointers or functions. */
1642 TYPE_NAME (SYMBOL_TYPE (sym)) =
1643 concat (DEPRECATED_SYMBOL_NAME (sym), NULL);
1646 /* Ignore vendor section for Harris CX/UX targets. */
1647 else if (cs->c_name[0] == '$')
1649 #endif /* CXUX_TARGET */
1651 /* Keep track of any type which points to empty structured type,
1652 so it can be filled from a definition from another file. A
1653 simple forward reference (TYPE_CODE_UNDEF) is not an
1654 empty structured type, though; the forward references
1655 work themselves out via the magic of coff_lookup_type. */
1656 if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR &&
1657 TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym))) == 0 &&
1658 TYPE_CODE (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym))) !=
1661 register int i = hashname (DEPRECATED_SYMBOL_NAME (sym));
1663 SYMBOL_VALUE_CHAIN (sym) = opaque_type_chain[i];
1664 opaque_type_chain[i] = sym;
1666 add_symbol_to_list (sym, &file_symbols);
1672 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
1673 SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
1675 /* Some compilers try to be helpful by inventing "fake"
1676 names for anonymous enums, structures, and unions, like
1677 "~0fake" or ".0fake". Thanks, but no thanks... */
1678 if (TYPE_TAG_NAME (SYMBOL_TYPE (sym)) == 0)
1679 if (DEPRECATED_SYMBOL_NAME (sym) != NULL
1680 && *DEPRECATED_SYMBOL_NAME (sym) != '~'
1681 && *DEPRECATED_SYMBOL_NAME (sym) != '.')
1682 TYPE_TAG_NAME (SYMBOL_TYPE (sym)) =
1683 concat (DEPRECATED_SYMBOL_NAME (sym), NULL);
1685 add_symbol_to_list (sym, &file_symbols);
1695 /* Decode a coff type specifier; return the type that is meant. */
1697 static struct type *
1698 decode_type (register struct coff_symbol *cs, unsigned int c_type,
1699 register union internal_auxent *aux)
1701 register struct type *type = 0;
1702 unsigned int new_c_type;
1704 if (c_type & ~N_BTMASK)
1706 new_c_type = DECREF (c_type);
1709 type = decode_type (cs, new_c_type, aux);
1710 type = lookup_pointer_type (type);
1712 else if (ISFCN (c_type))
1714 type = decode_type (cs, new_c_type, aux);
1715 type = lookup_function_type (type);
1717 else if (ISARY (c_type))
1720 register unsigned short *dim;
1721 struct type *base_type, *index_type, *range_type;
1723 /* Define an array type. */
1724 /* auxent refers to array, not base type */
1725 if (aux->x_sym.x_tagndx.l == 0)
1728 /* shift the indices down */
1729 dim = &aux->x_sym.x_fcnary.x_ary.x_dimen[0];
1732 for (i = 0; *dim && i < DIMNUM - 1; i++, dim++)
1736 base_type = decode_type (cs, new_c_type, aux);
1737 index_type = lookup_fundamental_type (current_objfile, FT_INTEGER);
1739 create_range_type ((struct type *) NULL, index_type, 0, n - 1);
1741 create_array_type ((struct type *) NULL, base_type, range_type);
1746 /* Reference to existing type. This only occurs with the
1747 struct, union, and enum types. EPI a29k coff
1748 fakes us out by producing aux entries with a nonzero
1749 x_tagndx for definitions of structs, unions, and enums, so we
1750 have to check the c_sclass field. SCO 3.2v4 cc gets confused
1751 with pointers to pointers to defined structs, and generates
1752 negative x_tagndx fields. */
1753 if (cs->c_naux > 0 && aux->x_sym.x_tagndx.l != 0)
1755 if (cs->c_sclass != C_STRTAG
1756 && cs->c_sclass != C_UNTAG
1757 && cs->c_sclass != C_ENTAG
1758 && aux->x_sym.x_tagndx.l >= 0)
1760 type = coff_alloc_type (aux->x_sym.x_tagndx.l);
1765 complaint (&symfile_complaints,
1766 "Symbol table entry for %s has bad tagndx value",
1768 /* And fall through to decode_base_type... */
1772 return decode_base_type (cs, BTYPE (c_type), aux);
1775 /* Decode a coff type specifier for function definition;
1776 return the type that the function returns. */
1778 static struct type *
1779 decode_function_type (register struct coff_symbol *cs, unsigned int c_type,
1780 register union internal_auxent *aux)
1782 if (aux->x_sym.x_tagndx.l == 0)
1783 cs->c_naux = 0; /* auxent refers to function, not base type */
1785 return decode_type (cs, DECREF (c_type), aux);
1790 static struct type *
1791 decode_base_type (register struct coff_symbol *cs, unsigned int c_type,
1792 register union internal_auxent *aux)
1799 /* shows up with "void (*foo)();" structure members */
1800 return lookup_fundamental_type (current_objfile, FT_VOID);
1803 /* DGUX actually defines both T_ARG and T_VOID to the same value. */
1806 /* Shows up in DGUX, I think. Not sure where. */
1807 return lookup_fundamental_type (current_objfile, FT_VOID); /* shouldn't show up here */
1813 /* Intel 960 COFF has this symbol and meaning. */
1814 return lookup_fundamental_type (current_objfile, FT_VOID);
1818 return lookup_fundamental_type (current_objfile, FT_CHAR);
1821 return lookup_fundamental_type (current_objfile, FT_SHORT);
1824 return lookup_fundamental_type (current_objfile, FT_INTEGER);
1827 if (cs->c_sclass == C_FIELD
1828 && aux->x_sym.x_misc.x_lnsz.x_size > TARGET_LONG_BIT)
1829 return lookup_fundamental_type (current_objfile, FT_LONG_LONG);
1831 return lookup_fundamental_type (current_objfile, FT_LONG);
1834 return lookup_fundamental_type (current_objfile, FT_FLOAT);
1837 return lookup_fundamental_type (current_objfile, FT_DBL_PREC_FLOAT);
1840 return lookup_fundamental_type (current_objfile, FT_EXT_PREC_FLOAT);
1843 if (cs->c_naux != 1)
1845 /* anonymous structure type */
1846 type = coff_alloc_type (cs->c_symnum);
1847 TYPE_CODE (type) = TYPE_CODE_STRUCT;
1848 TYPE_NAME (type) = NULL;
1849 /* This used to set the tag to "<opaque>". But I think setting it
1850 to NULL is right, and the printing code can print it as
1852 TYPE_TAG_NAME (type) = NULL;
1853 INIT_CPLUS_SPECIFIC (type);
1854 TYPE_LENGTH (type) = 0;
1855 TYPE_FIELDS (type) = 0;
1856 TYPE_NFIELDS (type) = 0;
1860 type = coff_read_struct_type (cs->c_symnum,
1861 aux->x_sym.x_misc.x_lnsz.x_size,
1862 aux->x_sym.x_fcnary.x_fcn.x_endndx.l);
1867 if (cs->c_naux != 1)
1869 /* anonymous union type */
1870 type = coff_alloc_type (cs->c_symnum);
1871 TYPE_NAME (type) = NULL;
1872 /* This used to set the tag to "<opaque>". But I think setting it
1873 to NULL is right, and the printing code can print it as
1875 TYPE_TAG_NAME (type) = NULL;
1876 INIT_CPLUS_SPECIFIC (type);
1877 TYPE_LENGTH (type) = 0;
1878 TYPE_FIELDS (type) = 0;
1879 TYPE_NFIELDS (type) = 0;
1883 type = coff_read_struct_type (cs->c_symnum,
1884 aux->x_sym.x_misc.x_lnsz.x_size,
1885 aux->x_sym.x_fcnary.x_fcn.x_endndx.l);
1887 TYPE_CODE (type) = TYPE_CODE_UNION;
1891 if (cs->c_naux != 1)
1893 /* anonymous enum type */
1894 type = coff_alloc_type (cs->c_symnum);
1895 TYPE_CODE (type) = TYPE_CODE_ENUM;
1896 TYPE_NAME (type) = NULL;
1897 /* This used to set the tag to "<opaque>". But I think setting it
1898 to NULL is right, and the printing code can print it as
1900 TYPE_TAG_NAME (type) = NULL;
1901 TYPE_LENGTH (type) = 0;
1902 TYPE_FIELDS (type) = 0;
1903 TYPE_NFIELDS (type) = 0;
1907 type = coff_read_enum_type (cs->c_symnum,
1908 aux->x_sym.x_misc.x_lnsz.x_size,
1909 aux->x_sym.x_fcnary.x_fcn.x_endndx.l);
1914 /* shouldn't show up here */
1918 return lookup_fundamental_type (current_objfile, FT_UNSIGNED_CHAR);
1921 return lookup_fundamental_type (current_objfile, FT_UNSIGNED_SHORT);
1924 return lookup_fundamental_type (current_objfile, FT_UNSIGNED_INTEGER);
1927 if (cs->c_sclass == C_FIELD
1928 && aux->x_sym.x_misc.x_lnsz.x_size > TARGET_LONG_BIT)
1929 return lookup_fundamental_type (current_objfile, FT_UNSIGNED_LONG_LONG);
1931 return lookup_fundamental_type (current_objfile, FT_UNSIGNED_LONG);
1933 complaint (&symfile_complaints, "Unexpected type for symbol %s", cs->c_name);
1934 return lookup_fundamental_type (current_objfile, FT_VOID);
1937 /* This page contains subroutines of read_type. */
1939 /* Read the description of a structure (or union type) and return an
1940 object describing the type. */
1942 static struct type *
1943 coff_read_struct_type (int index, int length, int lastsym)
1947 struct nextfield *next;
1951 register struct type *type;
1952 register struct nextfield *list = 0;
1953 struct nextfield *new;
1957 struct coff_symbol member_sym;
1958 register struct coff_symbol *ms = &member_sym;
1959 struct internal_syment sub_sym;
1960 union internal_auxent sub_aux;
1963 type = coff_alloc_type (index);
1964 TYPE_CODE (type) = TYPE_CODE_STRUCT;
1965 INIT_CPLUS_SPECIFIC (type);
1966 TYPE_LENGTH (type) = length;
1968 while (!done && symnum < lastsym && symnum < nlist_nsyms_global)
1970 read_one_sym (ms, &sub_sym, &sub_aux);
1972 name = EXTERNAL_NAME (name, current_objfile->obfd);
1974 switch (ms->c_sclass)
1979 /* Get space to record the next field's data. */
1980 new = (struct nextfield *) alloca (sizeof (struct nextfield));
1984 /* Save the data. */
1988 ¤t_objfile->symbol_obstack);
1989 FIELD_TYPE (list->field) = decode_type (ms, ms->c_type, &sub_aux);
1990 FIELD_BITPOS (list->field) = 8 * ms->c_value;
1991 FIELD_BITSIZE (list->field) = 0;
1992 FIELD_STATIC_KIND (list->field) = 0;
1998 /* Get space to record the next field's data. */
1999 new = (struct nextfield *) alloca (sizeof (struct nextfield));
2003 /* Save the data. */
2007 ¤t_objfile->symbol_obstack);
2008 FIELD_TYPE (list->field) = decode_type (ms, ms->c_type, &sub_aux);
2009 FIELD_BITPOS (list->field) = ms->c_value;
2010 FIELD_BITSIZE (list->field) = sub_aux.x_sym.x_misc.x_lnsz.x_size;
2011 FIELD_STATIC_KIND (list->field) = 0;
2020 /* Now create the vector of fields, and record how big it is. */
2022 TYPE_NFIELDS (type) = nfields;
2023 TYPE_FIELDS (type) = (struct field *)
2024 TYPE_ALLOC (type, sizeof (struct field) * nfields);
2026 /* Copy the saved-up fields into the field vector. */
2028 for (n = nfields; list; list = list->next)
2029 TYPE_FIELD (type, --n) = list->field;
2034 /* Read a definition of an enumeration type,
2035 and create and return a suitable type object.
2036 Also defines the symbols that represent the values of the type. */
2039 static struct type *
2040 coff_read_enum_type (int index, int length, int lastsym)
2042 register struct symbol *sym;
2043 register struct type *type;
2046 struct pending **symlist;
2047 struct coff_symbol member_sym;
2048 register struct coff_symbol *ms = &member_sym;
2049 struct internal_syment sub_sym;
2050 union internal_auxent sub_aux;
2051 struct pending *osyms, *syms;
2055 int unsigned_enum = 1;
2057 type = coff_alloc_type (index);
2058 if (within_function)
2059 symlist = &local_symbols;
2061 symlist = &file_symbols;
2063 o_nsyms = osyms ? osyms->nsyms : 0;
2065 while (!done && symnum < lastsym && symnum < nlist_nsyms_global)
2067 read_one_sym (ms, &sub_sym, &sub_aux);
2069 name = EXTERNAL_NAME (name, current_objfile->obfd);
2071 switch (ms->c_sclass)
2074 sym = (struct symbol *) obstack_alloc
2075 (¤t_objfile->symbol_obstack,
2076 sizeof (struct symbol));
2077 memset (sym, 0, sizeof (struct symbol));
2079 DEPRECATED_SYMBOL_NAME (sym) =
2080 obsavestring (name, strlen (name),
2081 ¤t_objfile->symbol_obstack);
2082 SYMBOL_CLASS (sym) = LOC_CONST;
2083 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
2084 SYMBOL_VALUE (sym) = ms->c_value;
2085 add_symbol_to_list (sym, symlist);
2090 /* Sometimes the linker (on 386/ix 2.0.2 at least) screws
2091 up the count of how many symbols to read. So stop
2098 /* Now fill in the fields of the type-structure. */
2101 TYPE_LENGTH (type) = length;
2103 TYPE_LENGTH (type) = TARGET_INT_BIT / TARGET_CHAR_BIT; /* Assume ints */
2104 TYPE_CODE (type) = TYPE_CODE_ENUM;
2105 TYPE_NFIELDS (type) = nsyms;
2106 TYPE_FIELDS (type) = (struct field *)
2107 TYPE_ALLOC (type, sizeof (struct field) * nsyms);
2109 /* Find the symbols for the values and put them into the type.
2110 The symbols can be found in the symlist that we put them on
2111 to cause them to be defined. osyms contains the old value
2112 of that symlist; everything up to there was defined by us. */
2113 /* Note that we preserve the order of the enum constants, so
2114 that in something like "enum {FOO, LAST_THING=FOO}" we print
2115 FOO, not LAST_THING. */
2117 for (syms = *symlist, n = 0; syms; syms = syms->next)
2123 for (; j < syms->nsyms; j++, n++)
2125 struct symbol *xsym = syms->symbol[j];
2126 SYMBOL_TYPE (xsym) = type;
2127 TYPE_FIELD_NAME (type, n) = DEPRECATED_SYMBOL_NAME (xsym);
2128 TYPE_FIELD_BITPOS (type, n) = SYMBOL_VALUE (xsym);
2129 if (SYMBOL_VALUE (xsym) < 0)
2131 TYPE_FIELD_BITSIZE (type, n) = 0;
2132 TYPE_FIELD_STATIC_KIND (type, n) = 0;
2139 TYPE_FLAGS (type) |= TYPE_FLAG_UNSIGNED;
2144 /* Register our ability to parse symbols for coff BFD files. */
2146 static struct sym_fns coff_sym_fns =
2148 bfd_target_coff_flavour,
2149 coff_new_init, /* sym_new_init: init anything gbl to entire symtab */
2150 coff_symfile_init, /* sym_init: read initial info, setup for sym_read() */
2151 coff_symfile_read, /* sym_read: read a symbol file into symtab */
2152 coff_symfile_finish, /* sym_finish: finished with file, cleanup */
2153 default_symfile_offsets, /* sym_offsets: xlate external to internal form */
2154 NULL /* next: pointer to next struct sym_fns */
2158 _initialize_coffread (void)
2160 add_symtab_fns (&coff_sym_fns);