1 /* Read dbx symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986-2013 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>. */
19 /* This module provides three functions: dbx_symfile_init,
20 which initializes to read a symbol file; dbx_new_init, which
21 discards existing cached information when all symbols are being
22 discarded; and dbx_symfile_read, which reads a symbol table
25 dbx_symfile_read only does the minimum work necessary for letting the
26 user "name" things symbolically; it does not read the entire symtab.
27 Instead, it reads the external and static symbols and puts them in partial
28 symbol tables. When more extensive information is requested of a
29 file, the corresponding partial symbol table is mutated into a full
30 fledged symbol table by going back and reading the symbols
31 for real. dbx_psymtab_to_symtab() is the function that does this */
34 #include "gdb_string.h"
36 #if defined(__CYGNUSCLIB__)
37 #include <sys/types.h>
41 #include "gdb_obstack.h"
44 #include "breakpoint.h"
46 #include "gdbcore.h" /* for bfd stuff */
47 #include "libaout.h" /* FIXME Secret internal BFD stuff for a.out */
48 #include "filenames.h"
51 #include "stabsread.h"
52 #include "gdb-stabs.h"
54 #include "complaints.h"
56 #include "cp-support.h"
59 #include "gdb_assert.h"
60 #include "gdb_string.h"
62 #include "aout/aout64.h"
63 #include "aout/stab_gnu.h" /* We always use GNU stabs, not
67 /* Key for dbx-associated data. */
69 const struct objfile_data *dbx_objfile_data_key;
71 /* We put a pointer to this structure in the read_symtab_private field
76 /* Offset within the file symbol table of first local symbol for this
81 /* Length (in bytes) of the section of the symbol table devoted to
82 this file's symbols (actually, the section bracketed may contain
83 more than just this file's symbols). If ldsymlen is 0, the only
84 reason for this thing's existence is the dependency list. Nothing
85 else will happen when it is read in. */
89 /* The size of each symbol in the symbol file (in external form). */
93 /* Further information needed to locate the symbols if they are in
98 int file_string_offset;
101 #define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff)
102 #define LDSYMLEN(p) (((struct symloc *)((p)->read_symtab_private))->ldsymlen)
103 #define SYMLOC(p) ((struct symloc *)((p)->read_symtab_private))
104 #define SYMBOL_SIZE(p) (SYMLOC(p)->symbol_size)
105 #define SYMBOL_OFFSET(p) (SYMLOC(p)->symbol_offset)
106 #define STRING_OFFSET(p) (SYMLOC(p)->string_offset)
107 #define FILE_STRING_OFFSET(p) (SYMLOC(p)->file_string_offset)
110 /* The objfile we are currently reading. */
112 static struct objfile *dbxread_objfile;
114 /* Remember what we deduced to be the source language of this psymtab. */
116 static enum language psymtab_language = language_unknown;
118 /* The BFD for this file -- implicit parameter to next_symbol_text. */
120 static bfd *symfile_bfd;
122 /* The size of each symbol in the symbol file (in external form).
123 This is set by dbx_symfile_read when building psymtabs, and by
124 dbx_psymtab_to_symtab when building symtabs. */
126 static unsigned symbol_size;
128 /* This is the offset of the symbol table in the executable file. */
130 static unsigned symbol_table_offset;
132 /* This is the offset of the string table in the executable file. */
134 static unsigned string_table_offset;
136 /* For elf+stab executables, the n_strx field is not a simple index
137 into the string table. Instead, each .o file has a base offset in
138 the string table, and the associated symbols contain offsets from
139 this base. The following two variables contain the base offset for
140 the current and next .o files. */
142 static unsigned int file_string_table_offset;
143 static unsigned int next_file_string_table_offset;
145 /* .o and NLM files contain unrelocated addresses which are based at
146 0. When non-zero, this flag disables some of the special cases for
147 Solaris elf+stab text addresses at location 0. */
149 static int symfile_relocatable = 0;
151 /* If this is nonzero, N_LBRAC, N_RBRAC, and N_SLINE entries are
152 relative to the function start address. */
154 static int block_address_function_relative = 0;
156 /* The lowest text address we have yet encountered. This is needed
157 because in an a.out file, there is no header field which tells us
158 what address the program is actually going to be loaded at, so we
159 need to make guesses based on the symbols (which *are* relocated to
160 reflect the address it will be loaded at). */
162 static CORE_ADDR lowest_text_address;
164 /* Non-zero if there is any line number info in the objfile. Prevents
165 end_psymtab from discarding an otherwise empty psymtab. */
167 static int has_line_numbers;
169 /* Complaints about the symbols we have encountered. */
172 unknown_symtype_complaint (const char *arg1)
174 complaint (&symfile_complaints, _("unknown symbol type %s"), arg1);
178 lbrac_mismatch_complaint (int arg1)
180 complaint (&symfile_complaints,
181 _("N_LBRAC/N_RBRAC symbol mismatch at symtab pos %d"), arg1);
185 repeated_header_complaint (const char *arg1, int arg2)
187 complaint (&symfile_complaints,
188 _("\"repeated\" header file %s not "
189 "previously seen, at symtab pos %d"),
193 /* find_text_range --- find start and end of loadable code sections
195 The find_text_range function finds the shortest address range that
196 encloses all sections containing executable code, and stores it in
197 objfile's text_addr and text_size members.
199 dbx_symfile_read will use this to finish off the partial symbol
200 table, in some cases. */
203 find_text_range (bfd * sym_bfd, struct objfile *objfile)
210 for (sec = sym_bfd->sections; sec; sec = sec->next)
211 if (bfd_get_section_flags (sym_bfd, sec) & SEC_CODE)
213 CORE_ADDR sec_start = bfd_section_vma (sym_bfd, sec);
214 CORE_ADDR sec_end = sec_start + bfd_section_size (sym_bfd, sec);
218 if (sec_start < start)
233 error (_("Can't find any code sections in symbol file"));
235 DBX_TEXT_ADDR (objfile) = start;
236 DBX_TEXT_SIZE (objfile) = end - start;
241 /* During initial symbol readin, we need to have a structure to keep
242 track of which psymtabs have which bincls in them. This structure
243 is used during readin to setup the list of dependencies within each
244 partial symbol table. */
246 struct header_file_location
248 char *name; /* Name of header file */
249 int instance; /* See above */
250 struct partial_symtab *pst; /* Partial symtab that has the
251 BINCL/EINCL defs for this file. */
254 /* The actual list and controling variables. */
255 static struct header_file_location *bincl_list, *next_bincl;
256 static int bincls_allocated;
258 /* Local function prototypes. */
260 extern void _initialize_dbxread (void);
262 static void read_ofile_symtab (struct objfile *, struct partial_symtab *);
264 static void dbx_read_symtab (struct partial_symtab *self,
265 struct objfile *objfile);
267 static void dbx_psymtab_to_symtab_1 (struct objfile *, struct partial_symtab *);
269 static void read_dbx_dynamic_symtab (struct objfile *objfile);
271 static void read_dbx_symtab (struct objfile *);
273 static void free_bincl_list (struct objfile *);
275 static struct partial_symtab *find_corresponding_bincl_psymtab (char *, int);
277 static void add_bincl_to_list (struct partial_symtab *, char *, int);
279 static void init_bincl_list (int, struct objfile *);
281 static char *dbx_next_symbol_text (struct objfile *);
283 static void fill_symbuf (bfd *);
285 static void dbx_symfile_init (struct objfile *);
287 static void dbx_new_init (struct objfile *);
289 static void dbx_symfile_read (struct objfile *, int);
291 static void dbx_symfile_finish (struct objfile *);
293 static void record_minimal_symbol (char *, CORE_ADDR, int, struct objfile *);
295 static void add_new_header_file (char *, int);
297 static void add_old_header_file (char *, int);
299 static void add_this_object_header_file (int);
301 static struct partial_symtab *start_psymtab (struct objfile *, char *,
303 struct partial_symbol **,
304 struct partial_symbol **);
306 /* Free up old header file tables. */
309 free_header_files (void)
311 if (this_object_header_files)
313 xfree (this_object_header_files);
314 this_object_header_files = NULL;
316 n_allocated_this_object_header_files = 0;
319 /* Allocate new header file tables. */
322 init_header_files (void)
324 n_allocated_this_object_header_files = 10;
325 this_object_header_files = (int *) xmalloc (10 * sizeof (int));
328 /* Add header file number I for this object file
329 at the next successive FILENUM. */
332 add_this_object_header_file (int i)
334 if (n_this_object_header_files == n_allocated_this_object_header_files)
336 n_allocated_this_object_header_files *= 2;
337 this_object_header_files
338 = (int *) xrealloc ((char *) this_object_header_files,
339 n_allocated_this_object_header_files * sizeof (int));
342 this_object_header_files[n_this_object_header_files++] = i;
345 /* Add to this file an "old" header file, one already seen in
346 a previous object file. NAME is the header file's name.
347 INSTANCE is its instance code, to select among multiple
348 symbol tables for the same header file. */
351 add_old_header_file (char *name, int instance)
353 struct header_file *p = HEADER_FILES (dbxread_objfile);
356 for (i = 0; i < N_HEADER_FILES (dbxread_objfile); i++)
357 if (filename_cmp (p[i].name, name) == 0 && instance == p[i].instance)
359 add_this_object_header_file (i);
362 repeated_header_complaint (name, symnum);
365 /* Add to this file a "new" header file: definitions for its types follow.
366 NAME is the header file's name.
367 Most often this happens only once for each distinct header file,
368 but not necessarily. If it happens more than once, INSTANCE has
369 a different value each time, and references to the header file
370 use INSTANCE values to select among them.
372 dbx output contains "begin" and "end" markers for each new header file,
373 but at this level we just need to know which files there have been;
374 so we record the file when its "begin" is seen and ignore the "end". */
377 add_new_header_file (char *name, int instance)
380 struct header_file *hfile;
382 /* Make sure there is room for one more header file. */
384 i = N_ALLOCATED_HEADER_FILES (dbxread_objfile);
386 if (N_HEADER_FILES (dbxread_objfile) == i)
390 N_ALLOCATED_HEADER_FILES (dbxread_objfile) = 10;
391 HEADER_FILES (dbxread_objfile) = (struct header_file *)
392 xmalloc (10 * sizeof (struct header_file));
397 N_ALLOCATED_HEADER_FILES (dbxread_objfile) = i;
398 HEADER_FILES (dbxread_objfile) = (struct header_file *)
399 xrealloc ((char *) HEADER_FILES (dbxread_objfile),
400 (i * sizeof (struct header_file)));
404 /* Create an entry for this header file. */
406 i = N_HEADER_FILES (dbxread_objfile)++;
407 hfile = HEADER_FILES (dbxread_objfile) + i;
408 hfile->name = xstrdup (name);
409 hfile->instance = instance;
412 = (struct type **) xmalloc (10 * sizeof (struct type *));
413 memset (hfile->vector, 0, 10 * sizeof (struct type *));
415 add_this_object_header_file (i);
419 static struct type **
420 explicit_lookup_type (int real_filenum, int index)
422 struct header_file *f = &HEADER_FILES (dbxread_objfile)[real_filenum];
424 if (index >= f->length)
427 f->vector = (struct type **)
428 xrealloc (f->vector, f->length * sizeof (struct type *));
429 memset (&f->vector[f->length / 2],
430 '\0', f->length * sizeof (struct type *) / 2);
432 return &f->vector[index];
437 record_minimal_symbol (char *name, CORE_ADDR address, int type,
438 struct objfile *objfile)
440 enum minimal_symbol_type ms_type;
442 asection *bfd_section;
448 section = SECT_OFF_TEXT (objfile);
449 bfd_section = DBX_TEXT_SECTION (objfile);
453 section = SECT_OFF_DATA (objfile);
454 bfd_section = DBX_DATA_SECTION (objfile);
458 section = SECT_OFF_BSS (objfile);
459 bfd_section = DBX_BSS_SECTION (objfile);
469 section = SECT_OFF_DATA (objfile);
470 bfd_section = DBX_DATA_SECTION (objfile);
473 /* I don't think this type actually exists; since a N_SETV is the result
474 of going over many .o files, it doesn't make sense to have one
476 ms_type = mst_file_data;
477 section = SECT_OFF_DATA (objfile);
478 bfd_section = DBX_DATA_SECTION (objfile);
485 ms_type = mst_file_text;
486 section = SECT_OFF_TEXT (objfile);
487 bfd_section = DBX_TEXT_SECTION (objfile);
490 ms_type = mst_file_data;
492 /* Check for __DYNAMIC, which is used by Sun shared libraries.
493 Record it as global even if it's local, not global, so
494 lookup_minimal_symbol can find it. We don't check symbol_leading_char
495 because for SunOS4 it always is '_'. */
496 if (name[8] == 'C' && strcmp ("__DYNAMIC", name) == 0)
499 /* Same with virtual function tables, both global and static. */
501 char *tempstring = name;
503 if (tempstring[0] == bfd_get_symbol_leading_char (objfile->obfd))
505 if (is_vtable_name (tempstring))
508 section = SECT_OFF_DATA (objfile);
509 bfd_section = DBX_DATA_SECTION (objfile);
512 ms_type = mst_file_bss;
513 section = SECT_OFF_BSS (objfile);
514 bfd_section = DBX_BSS_SECTION (objfile);
517 ms_type = mst_unknown;
523 if ((ms_type == mst_file_text || ms_type == mst_text)
524 && address < lowest_text_address)
525 lowest_text_address = address;
527 prim_record_minimal_symbol_and_info
528 (name, address, ms_type, section, bfd_section, objfile);
531 /* Scan and build partial symbols for a symbol file.
532 We have been initialized by a call to dbx_symfile_init, which
533 put all the relevant info into a "struct dbx_symfile_info",
534 hung off the objfile structure. */
537 dbx_symfile_read (struct objfile *objfile, int symfile_flags)
541 struct cleanup *back_to;
543 sym_bfd = objfile->obfd;
545 /* .o and .nlm files are relocatables with text, data and bss segs based at
546 0. This flag disables special (Solaris stabs-in-elf only) fixups for
547 symbols with a value of 0. */
549 symfile_relocatable = bfd_get_file_flags (sym_bfd) & HAS_RELOC;
551 /* This is true for Solaris (and all other systems which put stabs
552 in sections, hopefully, since it would be silly to do things
553 differently from Solaris), and false for SunOS4 and other a.out
555 block_address_function_relative =
556 ((0 == strncmp (bfd_get_target (sym_bfd), "elf", 3))
557 || (0 == strncmp (bfd_get_target (sym_bfd), "som", 3))
558 || (0 == strncmp (bfd_get_target (sym_bfd), "coff", 4))
559 || (0 == strncmp (bfd_get_target (sym_bfd), "pe", 2))
560 || (0 == strncmp (bfd_get_target (sym_bfd), "epoc-pe", 7))
561 || (0 == strncmp (bfd_get_target (sym_bfd), "nlm", 3)));
563 val = bfd_seek (sym_bfd, DBX_SYMTAB_OFFSET (objfile), SEEK_SET);
565 perror_with_name (objfile->name);
567 /* Size the symbol table. */
568 if (objfile->global_psymbols.size == 0 && objfile->static_psymbols.size == 0)
569 init_psymbol_list (objfile, DBX_SYMCOUNT (objfile));
571 symbol_size = DBX_SYMBOL_SIZE (objfile);
572 symbol_table_offset = DBX_SYMTAB_OFFSET (objfile);
574 free_pending_blocks ();
575 back_to = make_cleanup (really_free_pendings, 0);
577 init_minimal_symbol_collection ();
578 make_cleanup_discard_minimal_symbols ();
580 /* Read stabs data from executable file and define symbols. */
582 read_dbx_symtab (objfile);
584 /* Add the dynamic symbols. */
586 read_dbx_dynamic_symtab (objfile);
588 /* Install any minimal symbols that have been collected as the current
589 minimal symbols for this objfile. */
591 install_minimal_symbols (objfile);
593 do_cleanups (back_to);
596 /* Initialize anything that needs initializing when a completely new
597 symbol file is specified (not just adding some symbols from another
598 file, e.g. a shared library). */
601 dbx_new_init (struct objfile *ignore)
603 stabsread_new_init ();
604 buildsym_new_init ();
605 init_header_files ();
609 /* dbx_symfile_init ()
610 is the dbx-specific initialization routine for reading symbols.
611 It is passed a struct objfile which contains, among other things,
612 the BFD for the file whose symbols are being read, and a slot for a pointer
613 to "private data" which we fill with goodies.
615 We read the string table into malloc'd space and stash a pointer to it.
617 Since BFD doesn't know how to read debug symbols in a format-independent
618 way (and may never do so...), we have to do it ourselves. We will never
619 be called unless this is an a.out (or very similar) file.
620 FIXME, there should be a cleaner peephole into the BFD environment here. */
622 #define DBX_STRINGTAB_SIZE_SIZE sizeof(long) /* FIXME */
625 dbx_symfile_init (struct objfile *objfile)
628 bfd *sym_bfd = objfile->obfd;
629 char *name = bfd_get_filename (sym_bfd);
631 unsigned char size_temp[DBX_STRINGTAB_SIZE_SIZE];
632 struct dbx_symfile_info *dbx;
634 /* Allocate struct to keep track of the symfile. */
635 dbx = XCNEW (struct dbx_symfile_info);
636 set_objfile_data (objfile, dbx_objfile_data_key, dbx);
638 DBX_TEXT_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".text");
639 DBX_DATA_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".data");
640 DBX_BSS_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".bss");
642 /* FIXME POKING INSIDE BFD DATA STRUCTURES. */
643 #define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd))
644 #define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd))
646 /* FIXME POKING INSIDE BFD DATA STRUCTURES. */
648 DBX_SYMFILE_INFO (objfile)->stab_section_info = NULL;
650 text_sect = bfd_get_section_by_name (sym_bfd, ".text");
652 error (_("Can't find .text section in symbol file"));
653 DBX_TEXT_ADDR (objfile) = bfd_section_vma (sym_bfd, text_sect);
654 DBX_TEXT_SIZE (objfile) = bfd_section_size (sym_bfd, text_sect);
656 DBX_SYMBOL_SIZE (objfile) = obj_symbol_entry_size (sym_bfd);
657 DBX_SYMCOUNT (objfile) = bfd_get_symcount (sym_bfd);
658 DBX_SYMTAB_OFFSET (objfile) = SYMBOL_TABLE_OFFSET;
660 /* Read the string table and stash it away in the objfile_obstack.
661 When we blow away the objfile the string table goes away as well.
662 Note that gdb used to use the results of attempting to malloc the
663 string table, based on the size it read, as a form of sanity check
664 for botched byte swapping, on the theory that a byte swapped string
665 table size would be so totally bogus that the malloc would fail. Now
666 that we put in on the objfile_obstack, we can't do this since gdb gets
667 a fatal error (out of virtual memory) if the size is bogus. We can
668 however at least check to see if the size is less than the size of
669 the size field itself, or larger than the size of the entire file.
670 Note that all valid string tables have a size greater than zero, since
671 the bytes used to hold the size are included in the count. */
673 if (STRING_TABLE_OFFSET == 0)
675 /* It appears that with the existing bfd code, STRING_TABLE_OFFSET
676 will never be zero, even when there is no string table. This
677 would appear to be a bug in bfd. */
678 DBX_STRINGTAB_SIZE (objfile) = 0;
679 DBX_STRINGTAB (objfile) = NULL;
683 val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, SEEK_SET);
685 perror_with_name (name);
687 memset (size_temp, 0, sizeof (size_temp));
688 val = bfd_bread (size_temp, sizeof (size_temp), sym_bfd);
691 perror_with_name (name);
695 /* With the existing bfd code, STRING_TABLE_OFFSET will be set to
696 EOF if there is no string table, and attempting to read the size
697 from EOF will read zero bytes. */
698 DBX_STRINGTAB_SIZE (objfile) = 0;
699 DBX_STRINGTAB (objfile) = NULL;
703 /* Read some data that would appear to be the string table size.
704 If there really is a string table, then it is probably the right
705 size. Byteswap if necessary and validate the size. Note that
706 the minimum is DBX_STRINGTAB_SIZE_SIZE. If we just read some
707 random data that happened to be at STRING_TABLE_OFFSET, because
708 bfd can't tell us there is no string table, the sanity checks may
709 or may not catch this. */
710 DBX_STRINGTAB_SIZE (objfile) = bfd_h_get_32 (sym_bfd, size_temp);
712 if (DBX_STRINGTAB_SIZE (objfile) < sizeof (size_temp)
713 || DBX_STRINGTAB_SIZE (objfile) > bfd_get_size (sym_bfd))
714 error (_("ridiculous string table size (%d bytes)."),
715 DBX_STRINGTAB_SIZE (objfile));
717 DBX_STRINGTAB (objfile) =
718 (char *) obstack_alloc (&objfile->objfile_obstack,
719 DBX_STRINGTAB_SIZE (objfile));
720 OBJSTAT (objfile, sz_strtab += DBX_STRINGTAB_SIZE (objfile));
722 /* Now read in the string table in one big gulp. */
724 val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, SEEK_SET);
726 perror_with_name (name);
727 val = bfd_bread (DBX_STRINGTAB (objfile),
728 DBX_STRINGTAB_SIZE (objfile),
730 if (val != DBX_STRINGTAB_SIZE (objfile))
731 perror_with_name (name);
736 /* Perform any local cleanups required when we are done with a particular
737 objfile. I.E, we are in the process of discarding all symbol information
738 for an objfile, freeing up all memory held for it, and unlinking the
739 objfile struct from the global list of known objfiles. */
742 dbx_symfile_finish (struct objfile *objfile)
744 free_header_files ();
748 dbx_free_symfile_info (struct objfile *objfile, void *arg)
750 struct dbx_symfile_info *dbx = arg;
752 if (dbx->header_files != NULL)
754 int i = dbx->n_header_files;
755 struct header_file *hfiles = dbx->header_files;
759 xfree (hfiles[i].name);
760 xfree (hfiles[i].vector);
770 /* Buffer for reading the symbol table entries. */
771 static struct external_nlist symbuf[4096];
772 static int symbuf_idx;
773 static int symbuf_end;
775 /* Name of last function encountered. Used in Solaris to approximate
776 object file boundaries. */
777 static char *last_function_name;
779 /* The address in memory of the string table of the object file we are
780 reading (which might not be the "main" object file, but might be a
781 shared library or some other dynamically loaded thing). This is
782 set by read_dbx_symtab when building psymtabs, and by
783 read_ofile_symtab when building symtabs, and is used only by
784 next_symbol_text. FIXME: If that is true, we don't need it when
785 building psymtabs, right? */
786 static char *stringtab_global;
788 /* These variables are used to control fill_symbuf when the stabs
789 symbols are not contiguous (as may be the case when a COFF file is
790 linked using --split-by-reloc). */
791 static struct stab_section_list *symbuf_sections;
792 static unsigned int symbuf_left;
793 static unsigned int symbuf_read;
795 /* This variable stores a global stabs buffer, if we read stabs into
796 memory in one chunk in order to process relocations. */
797 static bfd_byte *stabs_data;
799 /* Refill the symbol table input buffer
800 and set the variables that control fetching entries from it.
801 Reports an error if no data available.
802 This function can read past the end of the symbol table
803 (into the string table) but this does no harm. */
806 fill_symbuf (bfd *sym_bfd)
813 nbytes = sizeof (symbuf);
814 if (nbytes > symbuf_left)
815 nbytes = symbuf_left;
816 memcpy (symbuf, stabs_data + symbuf_read, nbytes);
818 else if (symbuf_sections == NULL)
820 count = sizeof (symbuf);
821 nbytes = bfd_bread (symbuf, count, sym_bfd);
825 if (symbuf_left <= 0)
827 file_ptr filepos = symbuf_sections->section->filepos;
829 if (bfd_seek (sym_bfd, filepos, SEEK_SET) != 0)
830 perror_with_name (bfd_get_filename (sym_bfd));
831 symbuf_left = bfd_section_size (sym_bfd, symbuf_sections->section);
832 symbol_table_offset = filepos - symbuf_read;
833 symbuf_sections = symbuf_sections->next;
837 if (count > sizeof (symbuf))
838 count = sizeof (symbuf);
839 nbytes = bfd_bread (symbuf, count, sym_bfd);
843 perror_with_name (bfd_get_filename (sym_bfd));
844 else if (nbytes == 0)
845 error (_("Premature end of file reading symbol table"));
846 symbuf_end = nbytes / symbol_size;
848 symbuf_left -= nbytes;
849 symbuf_read += nbytes;
853 stabs_seek (int sym_offset)
857 symbuf_read += sym_offset;
858 symbuf_left -= sym_offset;
861 bfd_seek (symfile_bfd, sym_offset, SEEK_CUR);
864 #define INTERNALIZE_SYMBOL(intern, extern, abfd) \
866 (intern).n_strx = bfd_h_get_32 (abfd, (extern)->e_strx); \
867 (intern).n_type = bfd_h_get_8 (abfd, (extern)->e_type); \
868 (intern).n_other = 0; \
869 (intern).n_desc = bfd_h_get_16 (abfd, (extern)->e_desc); \
870 if (bfd_get_sign_extend_vma (abfd)) \
871 (intern).n_value = bfd_h_get_signed_32 (abfd, (extern)->e_value); \
873 (intern).n_value = bfd_h_get_32 (abfd, (extern)->e_value); \
876 /* Invariant: The symbol pointed to by symbuf_idx is the first one
877 that hasn't been swapped. Swap the symbol at the same time
878 that symbuf_idx is incremented. */
880 /* dbx allows the text of a symbol name to be continued into the
881 next symbol name! When such a continuation is encountered
882 (a \ at the end of the text of a name)
883 call this function to get the continuation. */
886 dbx_next_symbol_text (struct objfile *objfile)
888 struct internal_nlist nlist;
890 if (symbuf_idx == symbuf_end)
891 fill_symbuf (symfile_bfd);
894 INTERNALIZE_SYMBOL (nlist, &symbuf[symbuf_idx], symfile_bfd);
895 OBJSTAT (objfile, n_stabs++);
899 return nlist.n_strx + stringtab_global + file_string_table_offset;
902 /* Initialize the list of bincls to contain none and have some
906 init_bincl_list (int number, struct objfile *objfile)
908 bincls_allocated = number;
909 next_bincl = bincl_list = (struct header_file_location *)
910 xmalloc (bincls_allocated * sizeof (struct header_file_location));
913 /* Add a bincl to the list. */
916 add_bincl_to_list (struct partial_symtab *pst, char *name, int instance)
918 if (next_bincl >= bincl_list + bincls_allocated)
920 int offset = next_bincl - bincl_list;
922 bincls_allocated *= 2;
923 bincl_list = (struct header_file_location *)
924 xrealloc ((char *) bincl_list,
925 bincls_allocated * sizeof (struct header_file_location));
926 next_bincl = bincl_list + offset;
928 next_bincl->pst = pst;
929 next_bincl->instance = instance;
930 next_bincl++->name = name;
933 /* Given a name, value pair, find the corresponding
934 bincl in the list. Return the partial symtab associated
935 with that header_file_location. */
937 static struct partial_symtab *
938 find_corresponding_bincl_psymtab (char *name, int instance)
940 struct header_file_location *bincl;
942 for (bincl = bincl_list; bincl < next_bincl; bincl++)
943 if (bincl->instance == instance
944 && strcmp (name, bincl->name) == 0)
947 repeated_header_complaint (name, symnum);
948 return (struct partial_symtab *) 0;
951 /* Free the storage allocated for the bincl list. */
954 free_bincl_list (struct objfile *objfile)
957 bincls_allocated = 0;
961 do_free_bincl_list_cleanup (void *objfile)
963 free_bincl_list (objfile);
966 static struct cleanup *
967 make_cleanup_free_bincl_list (struct objfile *objfile)
969 return make_cleanup (do_free_bincl_list_cleanup, objfile);
972 /* Set namestring based on nlist. If the string table index is invalid,
973 give a fake name, and print a single error message per symbol file read,
974 rather than abort the symbol reading or flood the user with messages. */
977 set_namestring (struct objfile *objfile, const struct internal_nlist *nlist)
981 if (nlist->n_strx + file_string_table_offset
982 >= DBX_STRINGTAB_SIZE (objfile)
983 || nlist->n_strx + file_string_table_offset < nlist->n_strx)
985 complaint (&symfile_complaints,
986 _("bad string table offset in symbol %d"),
988 namestring = "<bad string table offset>";
991 namestring = (nlist->n_strx + file_string_table_offset
992 + DBX_STRINGTAB (objfile));
996 /* Scan a SunOs dynamic symbol table for symbols of interest and
997 add them to the minimal symbol table. */
1000 read_dbx_dynamic_symtab (struct objfile *objfile)
1002 bfd *abfd = objfile->obfd;
1003 struct cleanup *back_to;
1013 CORE_ADDR sym_value;
1016 /* Check that the symbol file has dynamic symbols that we know about.
1017 bfd_arch_unknown can happen if we are reading a sun3 symbol file
1018 on a sun4 host (and vice versa) and bfd is not configured
1019 --with-target=all. This would trigger an assertion in bfd/sunos.c,
1020 so we ignore the dynamic symbols in this case. */
1021 if (bfd_get_flavour (abfd) != bfd_target_aout_flavour
1022 || (bfd_get_file_flags (abfd) & DYNAMIC) == 0
1023 || bfd_get_arch (abfd) == bfd_arch_unknown)
1026 dynsym_size = bfd_get_dynamic_symtab_upper_bound (abfd);
1027 if (dynsym_size < 0)
1030 dynsyms = (asymbol **) xmalloc (dynsym_size);
1031 back_to = make_cleanup (xfree, dynsyms);
1033 dynsym_count = bfd_canonicalize_dynamic_symtab (abfd, dynsyms);
1034 if (dynsym_count < 0)
1036 do_cleanups (back_to);
1040 /* Enter dynamic symbols into the minimal symbol table
1041 if this is a stripped executable. */
1042 if (bfd_get_symcount (abfd) <= 0)
1045 for (counter = 0; counter < dynsym_count; counter++, symptr++)
1047 asymbol *sym = *symptr;
1051 sec = bfd_get_section (sym);
1053 /* BFD symbols are section relative. */
1054 sym_value = sym->value + sec->vma;
1056 if (bfd_get_section_flags (abfd, sec) & SEC_CODE)
1058 sym_value += ANOFFSET (objfile->section_offsets,
1059 SECT_OFF_TEXT (objfile));
1062 else if (bfd_get_section_flags (abfd, sec) & SEC_DATA)
1064 sym_value += ANOFFSET (objfile->section_offsets,
1065 SECT_OFF_DATA (objfile));
1068 else if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
1070 sym_value += ANOFFSET (objfile->section_offsets,
1071 SECT_OFF_BSS (objfile));
1077 if (sym->flags & BSF_GLOBAL)
1080 record_minimal_symbol ((char *) bfd_asymbol_name (sym), sym_value,
1085 /* Symbols from shared libraries have a dynamic relocation entry
1086 that points to the associated slot in the procedure linkage table.
1087 We make a mininal symbol table entry with type mst_solib_trampoline
1088 at the address in the procedure linkage table. */
1089 dynrel_size = bfd_get_dynamic_reloc_upper_bound (abfd);
1090 if (dynrel_size < 0)
1092 do_cleanups (back_to);
1096 dynrels = (arelent **) xmalloc (dynrel_size);
1097 make_cleanup (xfree, dynrels);
1099 dynrel_count = bfd_canonicalize_dynamic_reloc (abfd, dynrels, dynsyms);
1100 if (dynrel_count < 0)
1102 do_cleanups (back_to);
1106 for (counter = 0, relptr = dynrels;
1107 counter < dynrel_count;
1108 counter++, relptr++)
1110 arelent *rel = *relptr;
1112 rel->address + ANOFFSET (objfile->section_offsets,
1113 SECT_OFF_DATA (objfile));
1115 switch (bfd_get_arch (abfd))
1117 case bfd_arch_sparc:
1118 if (rel->howto->type != RELOC_JMP_SLOT)
1122 /* `16' is the type BFD produces for a jump table relocation. */
1123 if (rel->howto->type != 16)
1126 /* Adjust address in the jump table to point to
1127 the start of the bsr instruction. */
1134 name = (char *) bfd_asymbol_name (*rel->sym_ptr_ptr);
1135 prim_record_minimal_symbol (name, address, mst_solib_trampoline,
1139 do_cleanups (back_to);
1143 find_stab_function_addr (char *namestring, const char *filename,
1144 struct objfile *objfile)
1146 struct minimal_symbol *msym;
1150 p = strchr (namestring, ':');
1155 strncpy (p, namestring, n);
1158 msym = lookup_minimal_symbol (p, filename, objfile);
1161 /* Sun Fortran appends an underscore to the minimal symbol name,
1162 try again with an appended underscore if the minimal symbol
1166 msym = lookup_minimal_symbol (p, filename, objfile);
1169 if (msym == NULL && filename != NULL)
1171 /* Try again without the filename. */
1173 msym = lookup_minimal_symbol (p, NULL, objfile);
1175 if (msym == NULL && filename != NULL)
1177 /* And try again for Sun Fortran, but without the filename. */
1180 msym = lookup_minimal_symbol (p, NULL, objfile);
1183 return msym == NULL ? 0 : SYMBOL_VALUE_ADDRESS (msym);
1187 function_outside_compilation_unit_complaint (const char *arg1)
1189 complaint (&symfile_complaints,
1190 _("function `%s' appears to be defined "
1191 "outside of all compilation units"),
1195 /* Setup partial_symtab's describing each source file for which
1196 debugging information is available. */
1199 read_dbx_symtab (struct objfile *objfile)
1201 struct gdbarch *gdbarch = get_objfile_arch (objfile);
1202 struct external_nlist *bufp = 0; /* =0 avoids gcc -Wall glitch. */
1203 struct internal_nlist nlist;
1204 CORE_ADDR text_addr;
1211 int past_first_source_file = 0;
1212 CORE_ADDR last_o_file_start = 0;
1213 CORE_ADDR last_function_start = 0;
1214 struct cleanup *back_to;
1216 int textlow_not_set;
1217 int data_sect_index;
1219 /* Current partial symtab. */
1220 struct partial_symtab *pst;
1222 /* List of current psymtab's include files. */
1223 const char **psymtab_include_list;
1224 int includes_allocated;
1227 /* Index within current psymtab dependency list. */
1228 struct partial_symtab **dependency_list;
1229 int dependencies_used, dependencies_allocated;
1231 text_addr = DBX_TEXT_ADDR (objfile);
1232 text_size = DBX_TEXT_SIZE (objfile);
1234 /* FIXME. We probably want to change stringtab_global rather than add this
1235 while processing every symbol entry. FIXME. */
1236 file_string_table_offset = 0;
1237 next_file_string_table_offset = 0;
1239 stringtab_global = DBX_STRINGTAB (objfile);
1241 pst = (struct partial_symtab *) 0;
1243 includes_allocated = 30;
1245 psymtab_include_list = (const char **) alloca (includes_allocated *
1246 sizeof (const char *));
1248 dependencies_allocated = 30;
1249 dependencies_used = 0;
1251 (struct partial_symtab **) alloca (dependencies_allocated *
1252 sizeof (struct partial_symtab *));
1254 /* Init bincl list */
1255 init_bincl_list (20, objfile);
1256 back_to = make_cleanup_free_bincl_list (objfile);
1258 set_last_source_file (NULL);
1260 lowest_text_address = (CORE_ADDR) -1;
1262 symfile_bfd = objfile->obfd; /* For next_text_symbol. */
1263 abfd = objfile->obfd;
1264 symbuf_end = symbuf_idx = 0;
1265 next_symbol_text_func = dbx_next_symbol_text;
1266 textlow_not_set = 1;
1267 has_line_numbers = 0;
1269 /* FIXME: jimb/2003-09-12: We don't apply the right section's offset
1270 to global and static variables. The stab for a global or static
1271 variable doesn't give us any indication of which section it's in,
1272 so we can't tell immediately which offset in
1273 objfile->section_offsets we should apply to the variable's
1276 We could certainly find out which section contains the variable
1277 by looking up the variable's unrelocated address with
1278 find_pc_section, but that would be expensive; this is the
1279 function that constructs the partial symbol tables by examining
1280 every symbol in the entire executable, and it's
1281 performance-critical. So that expense would not be welcome. I'm
1282 not sure what to do about this at the moment.
1284 What we have done for years is to simply assume that the .data
1285 section's offset is appropriate for all global and static
1286 variables. Recently, this was expanded to fall back to the .bss
1287 section's offset if there is no .data section, and then to the
1288 .rodata section's offset. */
1289 data_sect_index = objfile->sect_index_data;
1290 if (data_sect_index == -1)
1291 data_sect_index = SECT_OFF_BSS (objfile);
1292 if (data_sect_index == -1)
1293 data_sect_index = SECT_OFF_RODATA (objfile);
1295 /* If data_sect_index is still -1, that's okay. It's perfectly fine
1296 for the file to have no .data, no .bss, and no .text at all, if
1297 it also has no global or static variables. If it does, we will
1298 get an internal error from an ANOFFSET macro below when we try to
1299 use data_sect_index. */
1301 for (symnum = 0; symnum < DBX_SYMCOUNT (objfile); symnum++)
1303 /* Get the symbol for this run and pull out some info. */
1304 QUIT; /* Allow this to be interruptable. */
1305 if (symbuf_idx == symbuf_end)
1307 bufp = &symbuf[symbuf_idx++];
1310 * Special case to speed up readin.
1312 if (bfd_h_get_8 (abfd, bufp->e_type) == N_SLINE)
1314 has_line_numbers = 1;
1318 INTERNALIZE_SYMBOL (nlist, bufp, abfd);
1319 OBJSTAT (objfile, n_stabs++);
1321 /* Ok. There is a lot of code duplicated in the rest of this
1322 switch statement (for efficiency reasons). Since I don't
1323 like duplicating code, I will do my penance here, and
1324 describe the code which is duplicated:
1326 *) The assignment to namestring.
1327 *) The call to strchr.
1328 *) The addition of a partial symbol the two partial
1329 symbol lists. This last is a large section of code, so
1330 I've imbedded it in the following macro. */
1332 switch (nlist.n_type)
1335 * Standard, external, non-debugger, symbols
1338 case N_TEXT | N_EXT:
1339 case N_NBTEXT | N_EXT:
1340 nlist.n_value += ANOFFSET (objfile->section_offsets,
1341 SECT_OFF_TEXT (objfile));
1344 case N_DATA | N_EXT:
1345 case N_NBDATA | N_EXT:
1346 nlist.n_value += ANOFFSET (objfile->section_offsets,
1347 SECT_OFF_DATA (objfile));
1352 case N_NBBSS | N_EXT:
1353 case N_SETV | N_EXT: /* FIXME, is this in BSS? */
1354 nlist.n_value += ANOFFSET (objfile->section_offsets,
1355 SECT_OFF_BSS (objfile));
1360 namestring = set_namestring (objfile, &nlist);
1363 record_minimal_symbol (namestring, nlist.n_value,
1364 nlist.n_type, objfile); /* Always */
1367 /* Standard, local, non-debugger, symbols. */
1371 /* We need to be able to deal with both N_FN or N_TEXT,
1372 because we have no way of knowing whether the sys-supplied ld
1373 or GNU ld was used to make the executable. Sequents throw
1374 in another wrinkle -- they renumbered N_FN. */
1379 nlist.n_value += ANOFFSET (objfile->section_offsets,
1380 SECT_OFF_TEXT (objfile));
1381 namestring = set_namestring (objfile, &nlist);
1383 if ((namestring[0] == '-' && namestring[1] == 'l')
1384 || (namestring[(nsl = strlen (namestring)) - 1] == 'o'
1385 && namestring[nsl - 2] == '.'))
1387 if (past_first_source_file && pst
1388 /* The gould NP1 uses low values for .o and -l symbols
1389 which are not the address. */
1390 && nlist.n_value >= pst->textlow)
1392 end_psymtab (objfile, pst, psymtab_include_list,
1393 includes_used, symnum * symbol_size,
1394 nlist.n_value > pst->texthigh
1395 ? nlist.n_value : pst->texthigh,
1396 dependency_list, dependencies_used,
1398 pst = (struct partial_symtab *) 0;
1400 dependencies_used = 0;
1401 has_line_numbers = 0;
1404 past_first_source_file = 1;
1405 last_o_file_start = nlist.n_value;
1412 nlist.n_value += ANOFFSET (objfile->section_offsets,
1413 SECT_OFF_DATA (objfile));
1416 case N_UNDF | N_EXT:
1417 /* The case (nlist.n_value != 0) is a "Fortran COMMON" symbol.
1418 We used to rely on the target to tell us whether it knows
1419 where the symbol has been relocated to, but none of the
1420 target implementations actually provided that operation.
1421 So we just ignore the symbol, the same way we would do if
1422 we had a target-side symbol lookup which returned no match.
1424 All other symbols (with nlist.n_value == 0), are really
1425 undefined, and so we ignore them too. */
1429 if (processing_acc_compilation && nlist.n_strx == 1)
1431 /* Deal with relative offsets in the string table
1432 used in ELF+STAB under Solaris. If we want to use the
1433 n_strx field, which contains the name of the file,
1434 we must adjust file_string_table_offset *before* calling
1435 set_namestring(). */
1436 past_first_source_file = 1;
1437 file_string_table_offset = next_file_string_table_offset;
1438 next_file_string_table_offset =
1439 file_string_table_offset + nlist.n_value;
1440 if (next_file_string_table_offset < file_string_table_offset)
1441 error (_("string table offset backs up at %d"), symnum);
1442 /* FIXME -- replace error() with complaint. */
1447 /* Lots of symbol types we can just ignore. */
1454 /* Keep going . . . */
1457 * Special symbol types for GNU
1460 case N_INDR | N_EXT:
1462 case N_SETA | N_EXT:
1464 case N_SETT | N_EXT:
1466 case N_SETD | N_EXT:
1468 case N_SETB | N_EXT:
1479 static int prev_so_symnum = -10;
1480 static int first_so_symnum;
1482 static char *dirname_nso;
1483 int prev_textlow_not_set;
1485 valu = nlist.n_value + ANOFFSET (objfile->section_offsets,
1486 SECT_OFF_TEXT (objfile));
1488 prev_textlow_not_set = textlow_not_set;
1490 /* A zero value is probably an indication for the SunPRO 3.0
1491 compiler. end_psymtab explicitly tests for zero, so
1492 don't relocate it. */
1494 if (nlist.n_value == 0
1495 && gdbarch_sofun_address_maybe_missing (gdbarch))
1497 textlow_not_set = 1;
1501 textlow_not_set = 0;
1503 past_first_source_file = 1;
1505 if (prev_so_symnum != symnum - 1)
1506 { /* Here if prev stab wasn't N_SO. */
1507 first_so_symnum = symnum;
1511 end_psymtab (objfile, pst, psymtab_include_list,
1512 includes_used, symnum * symbol_size,
1513 valu > pst->texthigh ? valu : pst->texthigh,
1514 dependency_list, dependencies_used,
1515 prev_textlow_not_set);
1516 pst = (struct partial_symtab *) 0;
1518 dependencies_used = 0;
1519 has_line_numbers = 0;
1523 prev_so_symnum = symnum;
1525 /* End the current partial symtab and start a new one. */
1527 namestring = set_namestring (objfile, &nlist);
1529 /* Null name means end of .o file. Don't start a new one. */
1530 if (*namestring == '\000')
1533 /* Some compilers (including gcc) emit a pair of initial N_SOs.
1534 The first one is a directory name; the second the file name.
1535 If pst exists, is empty, and has a filename ending in '/',
1536 we assume the previous N_SO was a directory name. */
1538 p = lbasename (namestring);
1539 if (p != namestring && *p == '\000')
1541 /* Save the directory name SOs locally, then save it into
1542 the psymtab when it's created below. */
1543 dirname_nso = namestring;
1547 /* Some other compilers (C++ ones in particular) emit useless
1548 SOs for non-existant .c files. We ignore all subsequent SOs
1549 that immediately follow the first. */
1553 pst = start_psymtab (objfile,
1555 first_so_symnum * symbol_size,
1556 objfile->global_psymbols.next,
1557 objfile->static_psymbols.next);
1558 pst->dirname = dirname_nso;
1566 enum language tmp_language;
1568 /* Add this bincl to the bincl_list for future EXCLs. No
1569 need to save the string; it'll be around until
1570 read_dbx_symtab function returns. */
1572 namestring = set_namestring (objfile, &nlist);
1573 tmp_language = deduce_language_from_filename (namestring);
1575 /* Only change the psymtab's language if we've learned
1576 something useful (eg. tmp_language is not language_unknown).
1577 In addition, to match what start_subfile does, never change
1579 if (tmp_language != language_unknown
1580 && (tmp_language != language_c
1581 || psymtab_language != language_cplus))
1582 psymtab_language = tmp_language;
1586 /* FIXME: we should not get here without a PST to work on.
1587 Attempt to recover. */
1588 complaint (&symfile_complaints,
1589 _("N_BINCL %s not in entries for "
1590 "any file, at symtab pos %d"),
1591 namestring, symnum);
1594 add_bincl_to_list (pst, namestring, nlist.n_value);
1596 /* Mark down an include file in the current psymtab. */
1598 goto record_include_file;
1603 enum language tmp_language;
1605 /* Mark down an include file in the current psymtab. */
1606 namestring = set_namestring (objfile, &nlist);
1607 tmp_language = deduce_language_from_filename (namestring);
1609 /* Only change the psymtab's language if we've learned
1610 something useful (eg. tmp_language is not language_unknown).
1611 In addition, to match what start_subfile does, never change
1613 if (tmp_language != language_unknown
1614 && (tmp_language != language_c
1615 || psymtab_language != language_cplus))
1616 psymtab_language = tmp_language;
1618 /* In C++, one may expect the same filename to come round many
1619 times, when code is coming alternately from the main file
1620 and from inline functions in other files. So I check to see
1621 if this is a file we've seen before -- either the main
1622 source file, or a previously included file.
1624 This seems to be a lot of time to be spending on N_SOL, but
1625 things like "break c-exp.y:435" need to work (I
1626 suppose the psymtab_include_list could be hashed or put
1627 in a binary tree, if profiling shows this is a major hog). */
1628 if (pst && filename_cmp (namestring, pst->filename) == 0)
1633 for (i = 0; i < includes_used; i++)
1634 if (filename_cmp (namestring, psymtab_include_list[i]) == 0)
1643 record_include_file:
1645 psymtab_include_list[includes_used++] = namestring;
1646 if (includes_used >= includes_allocated)
1648 const char **orig = psymtab_include_list;
1650 psymtab_include_list = (const char **)
1651 alloca ((includes_allocated *= 2) * sizeof (const char *));
1652 memcpy (psymtab_include_list, orig,
1653 includes_used * sizeof (const char *));
1657 case N_LSYM: /* Typedef or automatic variable. */
1658 case N_STSYM: /* Data seg var -- static. */
1659 case N_LCSYM: /* BSS " */
1660 case N_ROSYM: /* Read-only data seg var -- static. */
1661 case N_NBSTS: /* Gould nobase. */
1662 case N_NBLCS: /* symbols. */
1664 case N_GSYM: /* Global (extern) variable; can be
1665 data or bss (sigh FIXME). */
1667 /* Following may probably be ignored; I'll leave them here
1668 for now (until I do Pascal and Modula 2 extensions). */
1670 case N_PC: /* I may or may not need this; I
1672 case N_M2C: /* I suspect that I can ignore this here. */
1673 case N_SCOPE: /* Same. */
1677 namestring = set_namestring (objfile, &nlist);
1679 /* See if this is an end of function stab. */
1680 if (pst && nlist.n_type == N_FUN && *namestring == '\000')
1684 /* It's value is the size (in bytes) of the function for
1685 function relative stabs, or the address of the function's
1686 end for old style stabs. */
1687 valu = nlist.n_value + last_function_start;
1688 if (pst->texthigh == 0 || valu > pst->texthigh)
1689 pst->texthigh = valu;
1693 p = (char *) strchr (namestring, ':');
1695 continue; /* Not a debugging symbol. */
1698 sym_name = NULL; /* pacify "gcc -Werror" */
1699 if (psymtab_language == language_cplus)
1701 char *new_name, *name = xmalloc (p - namestring + 1);
1702 memcpy (name, namestring, p - namestring);
1704 name[p - namestring] = '\0';
1705 new_name = cp_canonicalize_string (name);
1706 if (new_name != NULL)
1708 sym_len = strlen (new_name);
1709 sym_name = obstack_copy0 (&objfile->objfile_obstack,
1718 sym_name = namestring;
1719 sym_len = p - namestring;
1722 /* Main processing section for debugging symbols which
1723 the initial read through the symbol tables needs to worry
1724 about. If we reach this point, the symbol which we are
1725 considering is definitely one we are interested in.
1726 p must also contain the (valid) index into the namestring
1727 which indicates the debugging type symbol. */
1732 nlist.n_value += ANOFFSET (objfile->section_offsets,
1735 if (gdbarch_static_transform_name_p (gdbarch))
1736 gdbarch_static_transform_name (gdbarch, namestring);
1738 add_psymbol_to_list (sym_name, sym_len, 1,
1739 VAR_DOMAIN, LOC_STATIC,
1740 &objfile->static_psymbols,
1742 psymtab_language, objfile);
1746 nlist.n_value += ANOFFSET (objfile->section_offsets,
1748 /* The addresses in these entries are reported to be
1749 wrong. See the code that reads 'G's for symtabs. */
1750 add_psymbol_to_list (sym_name, sym_len, 1,
1751 VAR_DOMAIN, LOC_STATIC,
1752 &objfile->global_psymbols,
1754 psymtab_language, objfile);
1758 /* When a 'T' entry is defining an anonymous enum, it
1759 may have a name which is the empty string, or a
1760 single space. Since they're not really defining a
1761 symbol, those shouldn't go in the partial symbol
1762 table. We do pick up the elements of such enums at
1763 'check_enum:', below. */
1764 if (p >= namestring + 2
1765 || (p == namestring + 1
1766 && namestring[0] != ' '))
1768 add_psymbol_to_list (sym_name, sym_len, 1,
1769 STRUCT_DOMAIN, LOC_TYPEDEF,
1770 &objfile->static_psymbols,
1772 psymtab_language, objfile);
1775 /* Also a typedef with the same name. */
1776 add_psymbol_to_list (sym_name, sym_len, 1,
1777 VAR_DOMAIN, LOC_TYPEDEF,
1778 &objfile->static_psymbols,
1780 psymtab_language, objfile);
1787 if (p != namestring) /* a name is there, not just :T... */
1789 add_psymbol_to_list (sym_name, sym_len, 1,
1790 VAR_DOMAIN, LOC_TYPEDEF,
1791 &objfile->static_psymbols,
1793 psymtab_language, objfile);
1796 /* If this is an enumerated type, we need to
1797 add all the enum constants to the partial symbol
1798 table. This does not cover enums without names, e.g.
1799 "enum {a, b} c;" in C, but fortunately those are
1800 rare. There is no way for GDB to find those from the
1801 enum type without spending too much time on it. Thus
1802 to solve this problem, the compiler needs to put out the
1803 enum in a nameless type. GCC2 does this. */
1805 /* We are looking for something of the form
1806 <name> ":" ("t" | "T") [<number> "="] "e"
1807 {<constant> ":" <value> ","} ";". */
1809 /* Skip over the colon and the 't' or 'T'. */
1811 /* This type may be given a number. Also, numbers can come
1812 in pairs like (0,26). Skip over it. */
1813 while ((*p >= '0' && *p <= '9')
1814 || *p == '(' || *p == ',' || *p == ')'
1820 /* The aix4 compiler emits extra crud before the members. */
1823 /* Skip over the type (?). */
1827 /* Skip over the colon. */
1831 /* We have found an enumerated type. */
1832 /* According to comments in read_enum_type
1833 a comma could end it instead of a semicolon.
1834 I don't know where that happens.
1836 while (*p && *p != ';' && *p != ',')
1840 /* Check for and handle cretinous dbx symbol name
1842 if (*p == '\\' || (*p == '?' && p[1] == '\0'))
1843 p = next_symbol_text (objfile);
1845 /* Point to the character after the name
1846 of the enum constant. */
1847 for (q = p; *q && *q != ':'; q++)
1849 /* Note that the value doesn't matter for
1850 enum constants in psymtabs, just in symtabs. */
1851 add_psymbol_to_list (p, q - p, 1,
1852 VAR_DOMAIN, LOC_CONST,
1853 &objfile->static_psymbols, 0,
1854 0, psymtab_language, objfile);
1855 /* Point past the name. */
1857 /* Skip over the value. */
1858 while (*p && *p != ',')
1860 /* Advance past the comma. */
1868 /* Constant, e.g. from "const" in Pascal. */
1869 add_psymbol_to_list (sym_name, sym_len, 1,
1870 VAR_DOMAIN, LOC_CONST,
1871 &objfile->static_psymbols, nlist.n_value,
1872 0, psymtab_language, objfile);
1878 int name_len = p - namestring;
1879 char *name = xmalloc (name_len + 1);
1881 memcpy (name, namestring, name_len);
1882 name[name_len] = '\0';
1883 function_outside_compilation_unit_complaint (name);
1886 nlist.n_value += ANOFFSET (objfile->section_offsets,
1887 SECT_OFF_TEXT (objfile));
1888 /* Kludges for ELF/STABS with Sun ACC. */
1889 last_function_name = namestring;
1890 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1891 value for the bottom of the text seg in those cases. */
1892 if (nlist.n_value == ANOFFSET (objfile->section_offsets,
1893 SECT_OFF_TEXT (objfile))
1894 && gdbarch_sofun_address_maybe_missing (gdbarch))
1896 CORE_ADDR minsym_valu =
1897 find_stab_function_addr (namestring,
1898 pst ? pst->filename : NULL,
1901 /* find_stab_function_addr will return 0 if the minimal
1902 symbol wasn't found. (Unfortunately, this might also
1903 be a valid address.) Anyway, if it *does* return 0,
1904 it is likely that the value was set correctly to begin
1906 if (minsym_valu != 0)
1907 nlist.n_value = minsym_valu;
1909 if (pst && textlow_not_set
1910 && gdbarch_sofun_address_maybe_missing (gdbarch))
1912 pst->textlow = nlist.n_value;
1913 textlow_not_set = 0;
1917 /* Keep track of the start of the last function so we
1918 can handle end of function symbols. */
1919 last_function_start = nlist.n_value;
1921 /* In reordered executables this function may lie outside
1922 the bounds created by N_SO symbols. If that's the case
1923 use the address of this function as the low bound for
1924 the partial symbol table. */
1927 || (nlist.n_value < pst->textlow
1929 != ANOFFSET (objfile->section_offsets,
1930 SECT_OFF_TEXT (objfile))))))
1932 pst->textlow = nlist.n_value;
1933 textlow_not_set = 0;
1935 add_psymbol_to_list (sym_name, sym_len, 1,
1936 VAR_DOMAIN, LOC_BLOCK,
1937 &objfile->static_psymbols,
1939 psymtab_language, objfile);
1942 /* Global functions were ignored here, but now they
1943 are put into the global psymtab like one would expect.
1944 They're also in the minimal symbol table. */
1948 int name_len = p - namestring;
1949 char *name = xmalloc (name_len + 1);
1951 memcpy (name, namestring, name_len);
1952 name[name_len] = '\0';
1953 function_outside_compilation_unit_complaint (name);
1956 nlist.n_value += ANOFFSET (objfile->section_offsets,
1957 SECT_OFF_TEXT (objfile));
1958 /* Kludges for ELF/STABS with Sun ACC. */
1959 last_function_name = namestring;
1960 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1961 value for the bottom of the text seg in those cases. */
1962 if (nlist.n_value == ANOFFSET (objfile->section_offsets,
1963 SECT_OFF_TEXT (objfile))
1964 && gdbarch_sofun_address_maybe_missing (gdbarch))
1966 CORE_ADDR minsym_valu =
1967 find_stab_function_addr (namestring,
1968 pst ? pst->filename : NULL,
1971 /* find_stab_function_addr will return 0 if the minimal
1972 symbol wasn't found. (Unfortunately, this might also
1973 be a valid address.) Anyway, if it *does* return 0,
1974 it is likely that the value was set correctly to begin
1976 if (minsym_valu != 0)
1977 nlist.n_value = minsym_valu;
1979 if (pst && textlow_not_set
1980 && gdbarch_sofun_address_maybe_missing (gdbarch))
1982 pst->textlow = nlist.n_value;
1983 textlow_not_set = 0;
1987 /* Keep track of the start of the last function so we
1988 can handle end of function symbols. */
1989 last_function_start = nlist.n_value;
1991 /* In reordered executables this function may lie outside
1992 the bounds created by N_SO symbols. If that's the case
1993 use the address of this function as the low bound for
1994 the partial symbol table. */
1997 || (nlist.n_value < pst->textlow
1999 != ANOFFSET (objfile->section_offsets,
2000 SECT_OFF_TEXT (objfile))))))
2002 pst->textlow = nlist.n_value;
2003 textlow_not_set = 0;
2005 add_psymbol_to_list (sym_name, sym_len, 1,
2006 VAR_DOMAIN, LOC_BLOCK,
2007 &objfile->global_psymbols,
2009 psymtab_language, objfile);
2012 /* Two things show up here (hopefully); static symbols of
2013 local scope (static used inside braces) or extensions
2014 of structure symbols. We can ignore both. */
2028 case '#': /* For symbol identification (used in live ranges). */
2032 /* It is a C++ nested symbol. We don't need to record it
2033 (I don't think); if we try to look up foo::bar::baz,
2034 then symbols for the symtab containing foo should get
2035 read in, I think. */
2036 /* Someone says sun cc puts out symbols like
2037 /foo/baz/maclib::/usr/local/bin/maclib,
2038 which would get here with a symbol type of ':'. */
2042 /* Unexpected symbol descriptor. The second and subsequent stabs
2043 of a continued stab can show up here. The question is
2044 whether they ever can mimic a normal stab--it would be
2045 nice if not, since we certainly don't want to spend the
2046 time searching to the end of every string looking for
2049 complaint (&symfile_complaints,
2050 _("unknown symbol descriptor `%c'"),
2053 /* Ignore it; perhaps it is an extension that we don't
2061 namestring = set_namestring (objfile, &nlist);
2063 /* Find the corresponding bincl and mark that psymtab on the
2064 psymtab dependency list. */
2066 struct partial_symtab *needed_pst =
2067 find_corresponding_bincl_psymtab (namestring, nlist.n_value);
2069 /* If this include file was defined earlier in this file,
2071 if (needed_pst == pst)
2079 for (i = 0; i < dependencies_used; i++)
2080 if (dependency_list[i] == needed_pst)
2086 /* If it's already in the list, skip the rest. */
2090 dependency_list[dependencies_used++] = needed_pst;
2091 if (dependencies_used >= dependencies_allocated)
2093 struct partial_symtab **orig = dependency_list;
2096 (struct partial_symtab **)
2097 alloca ((dependencies_allocated *= 2)
2098 * sizeof (struct partial_symtab *));
2099 memcpy (dependency_list, orig,
2101 * sizeof (struct partial_symtab *)));
2103 fprintf_unfiltered (gdb_stderr,
2104 "Had to reallocate "
2105 "dependency list.\n");
2106 fprintf_unfiltered (gdb_stderr,
2107 "New dependencies allocated: %d\n",
2108 dependencies_allocated);
2116 /* Solaris 2 end of module, finish current partial symbol table.
2117 end_psymtab will set pst->texthigh to the proper value, which
2118 is necessary if a module compiled without debugging info
2119 follows this module. */
2120 if (pst && gdbarch_sofun_address_maybe_missing (gdbarch))
2122 end_psymtab (objfile, pst, psymtab_include_list, includes_used,
2123 symnum * symbol_size,
2124 (CORE_ADDR) 0, dependency_list,
2125 dependencies_used, textlow_not_set);
2126 pst = (struct partial_symtab *) 0;
2128 dependencies_used = 0;
2129 has_line_numbers = 0;
2135 HANDLE_RBRAC (nlist.n_value);
2141 case N_SSYM: /* Claim: Structure or union element.
2142 Hopefully, I can ignore this. */
2143 case N_ENTRY: /* Alternate entry point; can ignore. */
2144 case N_MAIN: /* Can definitely ignore this. */
2145 case N_CATCH: /* These are GNU C++ extensions */
2146 case N_EHDECL: /* that can safely be ignored here. */
2156 case N_NSYMS: /* Ultrix 4.0: symbol count */
2157 case N_DEFD: /* GNU Modula-2 */
2158 case N_ALIAS: /* SunPro F77: alias name, ignore for now. */
2160 case N_OBJ: /* Useless types from Solaris. */
2163 /* These symbols aren't interesting; don't worry about them. */
2167 /* If we haven't found it yet, ignore it. It's probably some
2168 new type we don't know about yet. */
2169 unknown_symtype_complaint (hex_string (nlist.n_type));
2174 /* If there's stuff to be cleaned up, clean it up. */
2177 /* Don't set pst->texthigh lower than it already is. */
2178 CORE_ADDR text_end =
2179 (lowest_text_address == (CORE_ADDR) -1
2180 ? (text_addr + ANOFFSET (objfile->section_offsets,
2181 SECT_OFF_TEXT (objfile)))
2182 : lowest_text_address)
2185 end_psymtab (objfile, pst, psymtab_include_list, includes_used,
2186 symnum * symbol_size,
2187 text_end > pst->texthigh ? text_end : pst->texthigh,
2188 dependency_list, dependencies_used, textlow_not_set);
2191 do_cleanups (back_to);
2194 /* Allocate and partially fill a partial symtab. It will be
2195 completely filled at the end of the symbol list.
2197 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2198 is the address relative to which its symbols are (incremental) or 0
2201 static struct partial_symtab *
2202 start_psymtab (struct objfile *objfile, char *filename, CORE_ADDR textlow,
2203 int ldsymoff, struct partial_symbol **global_syms,
2204 struct partial_symbol **static_syms)
2206 struct partial_symtab *result =
2207 start_psymtab_common (objfile, objfile->section_offsets,
2208 filename, textlow, global_syms, static_syms);
2210 result->read_symtab_private = obstack_alloc (&objfile->objfile_obstack,
2211 sizeof (struct symloc));
2212 LDSYMOFF (result) = ldsymoff;
2213 result->read_symtab = dbx_read_symtab;
2214 SYMBOL_SIZE (result) = symbol_size;
2215 SYMBOL_OFFSET (result) = symbol_table_offset;
2216 STRING_OFFSET (result) = string_table_offset;
2217 FILE_STRING_OFFSET (result) = file_string_table_offset;
2220 /* If we're handling an ELF file, drag some section-relocation info
2221 for this source file out of the ELF symbol table, to compensate for
2222 Sun brain death. This replaces the section_offsets in this psymtab,
2224 elfstab_offset_sections (objfile, result);
2227 /* Deduce the source language from the filename for this psymtab. */
2228 psymtab_language = deduce_language_from_filename (filename);
2233 /* Close off the current usage of PST.
2234 Returns PST or NULL if the partial symtab was empty and thrown away.
2236 FIXME: List variables and peculiarities of same. */
2238 struct partial_symtab *
2239 end_psymtab (struct objfile *objfile, struct partial_symtab *pst,
2240 const char **include_list, int num_includes,
2241 int capping_symbol_offset, CORE_ADDR capping_text,
2242 struct partial_symtab **dependency_list, int number_dependencies,
2243 int textlow_not_set)
2246 struct gdbarch *gdbarch = get_objfile_arch (objfile);
2248 if (capping_symbol_offset != -1)
2249 LDSYMLEN (pst) = capping_symbol_offset - LDSYMOFF (pst);
2250 pst->texthigh = capping_text;
2252 /* Under Solaris, the N_SO symbols always have a value of 0,
2253 instead of the usual address of the .o file. Therefore,
2254 we have to do some tricks to fill in texthigh and textlow.
2255 The first trick is: if we see a static
2256 or global function, and the textlow for the current pst
2257 is not set (ie: textlow_not_set), then we use that function's
2258 address for the textlow of the pst. */
2260 /* Now, to fill in texthigh, we remember the last function seen
2261 in the .o file. Also, there's a hack in
2262 bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
2263 to here via the misc_info field. Therefore, we can fill in
2264 a reliable texthigh by taking the address plus size of the
2265 last function in the file. */
2267 if (pst->texthigh == 0 && last_function_name
2268 && gdbarch_sofun_address_maybe_missing (gdbarch))
2272 struct minimal_symbol *minsym;
2274 p = strchr (last_function_name, ':');
2276 p = last_function_name;
2277 n = p - last_function_name;
2279 strncpy (p, last_function_name, n);
2282 minsym = lookup_minimal_symbol (p, pst->filename, objfile);
2285 /* Sun Fortran appends an underscore to the minimal symbol name,
2286 try again with an appended underscore if the minimal symbol
2290 minsym = lookup_minimal_symbol (p, pst->filename, objfile);
2294 pst->texthigh = SYMBOL_VALUE_ADDRESS (minsym) + MSYMBOL_SIZE (minsym);
2296 last_function_name = NULL;
2299 if (!gdbarch_sofun_address_maybe_missing (gdbarch))
2301 /* This test will be true if the last .o file is only data. */
2302 else if (textlow_not_set)
2303 pst->textlow = pst->texthigh;
2306 struct partial_symtab *p1;
2308 /* If we know our own starting text address, then walk through all other
2309 psymtabs for this objfile, and if any didn't know their ending text
2310 address, set it to our starting address. Take care to not set our
2311 own ending address to our starting address, nor to set addresses on
2312 `dependency' files that have both textlow and texthigh zero. */
2314 ALL_OBJFILE_PSYMTABS (objfile, p1)
2316 if (p1->texthigh == 0 && p1->textlow != 0 && p1 != pst)
2318 p1->texthigh = pst->textlow;
2319 /* If this file has only data, then make textlow match
2321 if (p1->textlow == 0)
2322 p1->textlow = p1->texthigh;
2327 /* End of kludge for patching Solaris textlow and texthigh. */
2329 pst->n_global_syms =
2330 objfile->global_psymbols.next - (objfile->global_psymbols.list
2331 + pst->globals_offset);
2332 pst->n_static_syms =
2333 objfile->static_psymbols.next - (objfile->static_psymbols.list
2334 + pst->statics_offset);
2336 pst->number_of_dependencies = number_dependencies;
2337 if (number_dependencies)
2339 pst->dependencies = (struct partial_symtab **)
2340 obstack_alloc (&objfile->objfile_obstack,
2341 number_dependencies * sizeof (struct partial_symtab *));
2342 memcpy (pst->dependencies, dependency_list,
2343 number_dependencies * sizeof (struct partial_symtab *));
2346 pst->dependencies = 0;
2348 for (i = 0; i < num_includes; i++)
2350 struct partial_symtab *subpst =
2351 allocate_psymtab (include_list[i], objfile);
2353 /* Copy the sesction_offsets array from the main psymtab. */
2354 subpst->section_offsets = pst->section_offsets;
2355 subpst->read_symtab_private =
2356 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symloc));
2360 subpst->texthigh = 0;
2362 /* We could save slight bits of space by only making one of these,
2363 shared by the entire set of include files. FIXME-someday. */
2364 subpst->dependencies = (struct partial_symtab **)
2365 obstack_alloc (&objfile->objfile_obstack,
2366 sizeof (struct partial_symtab *));
2367 subpst->dependencies[0] = pst;
2368 subpst->number_of_dependencies = 1;
2370 subpst->globals_offset =
2371 subpst->n_global_syms =
2372 subpst->statics_offset =
2373 subpst->n_static_syms = 0;
2377 subpst->read_symtab = pst->read_symtab;
2380 sort_pst_symbols (objfile, pst);
2382 if (num_includes == 0
2383 && number_dependencies == 0
2384 && pst->n_global_syms == 0
2385 && pst->n_static_syms == 0
2386 && has_line_numbers == 0)
2388 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2389 it is on the obstack, but we can forget to chain it on the list. */
2390 /* Empty psymtabs happen as a result of header files which don't have
2391 any symbols in them. There can be a lot of them. But this check
2392 is wrong, in that a psymtab with N_SLINE entries but nothing else
2393 is not empty, but we don't realize that. Fixing that without slowing
2394 things down might be tricky. */
2396 discard_psymtab (objfile, pst);
2398 /* Indicate that psymtab was thrown away. */
2399 pst = (struct partial_symtab *) NULL;
2405 dbx_psymtab_to_symtab_1 (struct objfile *objfile, struct partial_symtab *pst)
2407 struct cleanup *old_chain;
2412 fprintf_unfiltered (gdb_stderr, "Psymtab for %s already read in. "
2413 "Shouldn't happen.\n",
2418 /* Read in all partial symtabs on which this one is dependent. */
2419 for (i = 0; i < pst->number_of_dependencies; i++)
2420 if (!pst->dependencies[i]->readin)
2422 /* Inform about additional files that need to be read in. */
2425 fputs_filtered (" ", gdb_stdout);
2427 fputs_filtered ("and ", gdb_stdout);
2429 printf_filtered ("%s...", pst->dependencies[i]->filename);
2430 wrap_here (""); /* Flush output. */
2431 gdb_flush (gdb_stdout);
2433 dbx_psymtab_to_symtab_1 (objfile, pst->dependencies[i]);
2436 if (LDSYMLEN (pst)) /* Otherwise it's a dummy. */
2438 /* Init stuff necessary for reading in symbols */
2441 old_chain = make_cleanup (really_free_pendings, 0);
2442 file_string_table_offset = FILE_STRING_OFFSET (pst);
2443 symbol_size = SYMBOL_SIZE (pst);
2445 /* Read in this file's symbols. */
2446 bfd_seek (objfile->obfd, SYMBOL_OFFSET (pst), SEEK_SET);
2447 read_ofile_symtab (objfile, pst);
2449 do_cleanups (old_chain);
2455 /* Read in all of the symbols for a given psymtab for real.
2456 Be verbose about it if the user wants that. SELF is not NULL. */
2459 dbx_read_symtab (struct partial_symtab *self, struct objfile *objfile)
2462 struct cleanup *back_to = NULL;
2466 fprintf_unfiltered (gdb_stderr, "Psymtab for %s already read in. "
2467 "Shouldn't happen.\n",
2472 if (LDSYMLEN (self) || self->number_of_dependencies)
2474 /* Print the message now, before reading the string table,
2475 to avoid disconcerting pauses. */
2478 printf_filtered ("Reading in symbols for %s...", self->filename);
2479 gdb_flush (gdb_stdout);
2482 sym_bfd = objfile->obfd;
2484 next_symbol_text_func = dbx_next_symbol_text;
2486 if (DBX_STAB_SECTION (objfile))
2489 = symfile_relocate_debug_section (objfile,
2490 DBX_STAB_SECTION (objfile),
2494 back_to = make_cleanup (free_current_contents,
2495 (void *) &stabs_data);
2498 dbx_psymtab_to_symtab_1 (objfile, self);
2501 do_cleanups (back_to);
2503 /* Match with global symbols. This only needs to be done once,
2504 after all of the symtabs and dependencies have been read in. */
2505 scan_file_globals (objfile);
2507 /* Finish up the debug error message. */
2509 printf_filtered ("done.\n");
2513 /* Read in a defined section of a specific object file's symbols. */
2516 read_ofile_symtab (struct objfile *objfile, struct partial_symtab *pst)
2519 struct external_nlist *bufp;
2520 struct internal_nlist nlist;
2522 unsigned max_symnum;
2524 int sym_offset; /* Offset to start of symbols to read */
2525 int sym_size; /* Size of symbols to read */
2526 CORE_ADDR text_offset; /* Start of text segment for symbols */
2527 int text_size; /* Size of text segment for symbols */
2528 struct section_offsets *section_offsets;
2530 sym_offset = LDSYMOFF (pst);
2531 sym_size = LDSYMLEN (pst);
2532 text_offset = pst->textlow;
2533 text_size = pst->texthigh - pst->textlow;
2534 /* This cannot be simply objfile->section_offsets because of
2535 elfstab_offset_sections() which initializes the psymtab section
2536 offsets information in a special way, and that is different from
2537 objfile->section_offsets. */
2538 section_offsets = pst->section_offsets;
2540 dbxread_objfile = objfile;
2541 subfile_stack = NULL;
2543 stringtab_global = DBX_STRINGTAB (objfile);
2544 set_last_source_file (NULL);
2546 abfd = objfile->obfd;
2547 symfile_bfd = objfile->obfd; /* Implicit param to next_text_symbol. */
2548 symbuf_end = symbuf_idx = 0;
2550 symbuf_left = sym_offset + sym_size;
2552 /* It is necessary to actually read one symbol *before* the start
2553 of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
2554 occurs before the N_SO symbol.
2556 Detecting this in read_dbx_symtab
2557 would slow down initial readin, so we look for it here instead. */
2558 if (!processing_acc_compilation && sym_offset >= (int) symbol_size)
2560 stabs_seek (sym_offset - symbol_size);
2562 bufp = &symbuf[symbuf_idx++];
2563 INTERNALIZE_SYMBOL (nlist, bufp, abfd);
2564 OBJSTAT (objfile, n_stabs++);
2566 namestring = set_namestring (objfile, &nlist);
2568 processing_gcc_compilation = 0;
2569 if (nlist.n_type == N_TEXT)
2571 const char *tempstring = namestring;
2573 if (strcmp (namestring, GCC_COMPILED_FLAG_SYMBOL) == 0)
2574 processing_gcc_compilation = 1;
2575 else if (strcmp (namestring, GCC2_COMPILED_FLAG_SYMBOL) == 0)
2576 processing_gcc_compilation = 2;
2577 if (tempstring[0] == bfd_get_symbol_leading_char (symfile_bfd))
2579 if (strncmp (tempstring, "__gnu_compiled", 14) == 0)
2580 processing_gcc_compilation = 2;
2583 /* Try to select a C++ demangling based on the compilation unit
2587 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
2588 know whether it will use the old style or v3 mangling. */
2589 if (processing_gcc_compilation)
2591 if (AUTO_DEMANGLING)
2593 set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
2600 /* The N_SO starting this symtab is the first symbol, so we
2601 better not check the symbol before it. I'm not this can
2602 happen, but it doesn't hurt to check for it. */
2603 stabs_seek (sym_offset);
2604 processing_gcc_compilation = 0;
2607 if (symbuf_idx == symbuf_end)
2609 bufp = &symbuf[symbuf_idx];
2610 if (bfd_h_get_8 (abfd, bufp->e_type) != N_SO)
2611 error (_("First symbol in segment of executable not a source symbol"));
2613 max_symnum = sym_size / symbol_size;
2616 symnum < max_symnum;
2619 QUIT; /* Allow this to be interruptable. */
2620 if (symbuf_idx == symbuf_end)
2622 bufp = &symbuf[symbuf_idx++];
2623 INTERNALIZE_SYMBOL (nlist, bufp, abfd);
2624 OBJSTAT (objfile, n_stabs++);
2626 type = bfd_h_get_8 (abfd, bufp->e_type);
2628 namestring = set_namestring (objfile, &nlist);
2632 if (sizeof (nlist.n_value) > 4
2633 /* We are a 64-bit debugger debugging a 32-bit program. */
2634 && (type == N_LSYM || type == N_PSYM))
2635 /* We have to be careful with the n_value in the case of N_LSYM
2636 and N_PSYM entries, because they are signed offsets from frame
2637 pointer, but we actually read them as unsigned 32-bit values.
2638 This is not a problem for 32-bit debuggers, for which negative
2639 values end up being interpreted correctly (as negative
2640 offsets) due to integer overflow.
2641 But we need to sign-extend the value for 64-bit debuggers,
2642 or we'll end up interpreting negative values as very large
2643 positive offsets. */
2644 nlist.n_value = (nlist.n_value ^ 0x80000000) - 0x80000000;
2645 process_one_symbol (type, nlist.n_desc, nlist.n_value,
2646 namestring, section_offsets, objfile);
2648 /* We skip checking for a new .o or -l file; that should never
2649 happen in this routine. */
2650 else if (type == N_TEXT)
2652 /* I don't think this code will ever be executed, because
2653 the GCC_COMPILED_FLAG_SYMBOL usually is right before
2654 the N_SO symbol which starts this source file.
2655 However, there is no reason not to accept
2656 the GCC_COMPILED_FLAG_SYMBOL anywhere. */
2658 if (strcmp (namestring, GCC_COMPILED_FLAG_SYMBOL) == 0)
2659 processing_gcc_compilation = 1;
2660 else if (strcmp (namestring, GCC2_COMPILED_FLAG_SYMBOL) == 0)
2661 processing_gcc_compilation = 2;
2664 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
2665 know whether it will use the old style or v3 mangling. */
2666 if (AUTO_DEMANGLING)
2668 set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
2672 else if (type & N_EXT || type == (unsigned char) N_TEXT
2673 || type == (unsigned char) N_NBTEXT)
2675 /* Global symbol: see if we came across a dbx defintion for
2676 a corresponding symbol. If so, store the value. Remove
2677 syms from the chain when their values are stored, but
2678 search the whole chain, as there may be several syms from
2679 different files with the same name. */
2680 /* This is probably not true. Since the files will be read
2681 in one at a time, each reference to a global symbol will
2682 be satisfied in each file as it appears. So we skip this
2688 /* In a Solaris elf file, this variable, which comes from the
2689 value of the N_SO symbol, will still be 0. Luckily, text_offset,
2690 which comes from pst->textlow is correct. */
2691 if (last_source_start_addr == 0)
2692 last_source_start_addr = text_offset;
2694 /* In reordered executables last_source_start_addr may not be the
2695 lower bound for this symtab, instead use text_offset which comes
2696 from pst->textlow which is correct. */
2697 if (last_source_start_addr > text_offset)
2698 last_source_start_addr = text_offset;
2700 pst->symtab = end_symtab (text_offset + text_size, objfile,
2701 SECT_OFF_TEXT (objfile));
2705 dbxread_objfile = NULL;
2709 /* This handles a single symbol from the symbol-file, building symbols
2710 into a GDB symtab. It takes these arguments and an implicit argument.
2712 TYPE is the type field of the ".stab" symbol entry.
2713 DESC is the desc field of the ".stab" entry.
2714 VALU is the value field of the ".stab" entry.
2715 NAME is the symbol name, in our address space.
2716 SECTION_OFFSETS is a set of amounts by which the sections of this
2717 object file were relocated when it was loaded into memory. Note
2718 that these section_offsets are not the objfile->section_offsets but
2719 the pst->section_offsets. All symbols that refer to memory
2720 locations need to be offset by these amounts.
2721 OBJFILE is the object file from which we are reading symbols. It
2722 is used in end_symtab. */
2725 process_one_symbol (int type, int desc, CORE_ADDR valu, char *name,
2726 struct section_offsets *section_offsets,
2727 struct objfile *objfile)
2729 struct gdbarch *gdbarch = get_objfile_arch (objfile);
2730 struct context_stack *new;
2731 /* This remembers the address of the start of a function. It is
2732 used because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries
2733 are relative to the current function's start address. On systems
2734 other than Solaris 2, this just holds the SECT_OFF_TEXT value,
2735 and is used to relocate these symbol types rather than
2737 static CORE_ADDR function_start_offset;
2739 /* This holds the address of the start of a function, without the
2740 system peculiarities of function_start_offset. */
2741 static CORE_ADDR last_function_start;
2743 /* If this is nonzero, we've seen an N_SLINE since the start of the
2744 current function. We use this to tell us to move the first sline
2745 to the beginning of the function regardless of what its given
2747 static int sline_found_in_function = 1;
2749 /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this
2750 source file. Used to detect the SunPRO solaris compiler. */
2751 static int n_opt_found;
2753 /* The stab type used for the definition of the last function.
2754 N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */
2755 static int function_stab_type = 0;
2757 if (!block_address_function_relative)
2759 /* N_LBRAC, N_RBRAC and N_SLINE entries are not relative to the
2760 function start address, so just use the text offset. */
2761 function_start_offset =
2762 ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2765 /* Something is wrong if we see real data before seeing a source
2768 if (get_last_source_file () == NULL && type != (unsigned char) N_SO)
2770 /* Ignore any symbols which appear before an N_SO symbol.
2771 Currently no one puts symbols there, but we should deal
2772 gracefully with the case. A complain()t might be in order,
2773 but this should not be an error (). */
2782 if (*name == '\000')
2784 /* This N_FUN marks the end of a function. This closes off
2785 the current block. */
2786 struct block *block;
2788 if (context_stack_depth <= 0)
2790 lbrac_mismatch_complaint (symnum);
2794 /* The following check is added before recording line 0 at
2795 end of function so as to handle hand-generated stabs
2796 which may have an N_FUN stabs at the end of the function,
2797 but no N_SLINE stabs. */
2798 if (sline_found_in_function)
2800 CORE_ADDR addr = last_function_start + valu;
2802 record_line (current_subfile, 0,
2803 gdbarch_addr_bits_remove (gdbarch, addr));
2806 within_function = 0;
2807 new = pop_context ();
2809 /* Make a block for the local symbols within. */
2810 block = finish_block (new->name, &local_symbols, new->old_blocks,
2811 new->start_addr, new->start_addr + valu,
2814 /* For C++, set the block's scope. */
2815 if (SYMBOL_LANGUAGE (new->name) == language_cplus)
2816 cp_set_block_scope (new->name, block, &objfile->objfile_obstack,
2819 /* May be switching to an assembler file which may not be using
2820 block relative stabs, so reset the offset. */
2821 if (block_address_function_relative)
2822 function_start_offset = 0;
2827 sline_found_in_function = 0;
2829 /* Relocate for dynamic loading. */
2830 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2831 valu = gdbarch_addr_bits_remove (gdbarch, valu);
2832 last_function_start = valu;
2834 goto define_a_symbol;
2837 /* This "symbol" just indicates the start of an inner lexical
2838 context within a function. */
2840 /* Ignore extra outermost context from SunPRO cc and acc. */
2841 if (n_opt_found && desc == 1)
2844 if (block_address_function_relative)
2845 /* Relocate for Sun ELF acc fn-relative syms. */
2846 valu += function_start_offset;
2848 /* On most machines, the block addresses are relative to the
2849 N_SO, the linker did not relocate them (sigh). */
2850 valu += last_source_start_addr;
2852 push_context (desc, valu);
2856 /* This "symbol" just indicates the end of an inner lexical
2857 context that was started with N_LBRAC. */
2859 /* Ignore extra outermost context from SunPRO cc and acc. */
2860 if (n_opt_found && desc == 1)
2863 if (block_address_function_relative)
2864 /* Relocate for Sun ELF acc fn-relative syms. */
2865 valu += function_start_offset;
2867 /* On most machines, the block addresses are relative to the
2868 N_SO, the linker did not relocate them (sigh). */
2869 valu += last_source_start_addr;
2871 if (context_stack_depth <= 0)
2873 lbrac_mismatch_complaint (symnum);
2877 new = pop_context ();
2878 if (desc != new->depth)
2879 lbrac_mismatch_complaint (symnum);
2881 if (local_symbols != NULL)
2883 /* GCC development snapshots from March to December of
2884 2000 would output N_LSYM entries after N_LBRAC
2885 entries. As a consequence, these symbols are simply
2886 discarded. Complain if this is the case. */
2887 complaint (&symfile_complaints,
2888 _("misplaced N_LBRAC entry; discarding local "
2889 "symbols which have no enclosing block"));
2891 local_symbols = new->locals;
2893 if (context_stack_depth > 1)
2895 /* This is not the outermost LBRAC...RBRAC pair in the
2896 function, its local symbols preceded it, and are the ones
2897 just recovered from the context stack. Define the block
2898 for them (but don't bother if the block contains no
2899 symbols. Should we complain on blocks without symbols?
2900 I can't think of any useful purpose for them). */
2901 if (local_symbols != NULL)
2903 /* Muzzle a compiler bug that makes end < start.
2905 ??? Which compilers? Is this ever harmful?. */
2906 if (new->start_addr > valu)
2908 complaint (&symfile_complaints,
2909 _("block start larger than block end"));
2910 new->start_addr = valu;
2912 /* Make a block for the local symbols within. */
2913 finish_block (0, &local_symbols, new->old_blocks,
2914 new->start_addr, valu, objfile);
2919 /* This is the outermost LBRAC...RBRAC pair. There is no
2920 need to do anything; leave the symbols that preceded it
2921 to be attached to the function's own block. We need to
2922 indicate that we just moved outside of the function. */
2923 within_function = 0;
2930 /* This kind of symbol indicates the start of an object file.
2931 Relocate for dynamic loading. */
2932 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2936 /* This type of symbol indicates the start of data for one
2937 source file. Finish the symbol table of the previous source
2938 file (if any) and start accumulating a new symbol table.
2939 Relocate for dynamic loading. */
2940 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2944 if (get_last_source_file ())
2946 /* Check if previous symbol was also an N_SO (with some
2947 sanity checks). If so, that one was actually the
2948 directory name, and the current one is the real file
2949 name. Patch things up. */
2950 if (previous_stab_code == (unsigned char) N_SO)
2952 patch_subfile_names (current_subfile, name);
2953 break; /* Ignore repeated SOs. */
2955 end_symtab (valu, objfile, SECT_OFF_TEXT (objfile));
2959 /* Null name means this just marks the end of text for this .o
2960 file. Don't start a new symtab in this case. */
2961 if (*name == '\000')
2964 if (block_address_function_relative)
2965 function_start_offset = 0;
2968 start_symtab (name, NULL, valu);
2969 record_debugformat ("stabs");
2973 /* This type of symbol indicates the start of data for a
2974 sub-source-file, one whose contents were copied or included
2975 in the compilation of the main source file (whose name was
2976 given in the N_SO symbol). Relocate for dynamic loading. */
2977 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2978 start_subfile (name, current_subfile->dirname);
2983 add_new_header_file (name, valu);
2984 start_subfile (name, current_subfile->dirname);
2988 start_subfile (pop_subfile (), current_subfile->dirname);
2992 add_old_header_file (name, valu);
2996 /* This type of "symbol" really just records one line-number --
2997 core-address correspondence. Enter it in the line list for
2998 this symbol table. */
3000 /* Relocate for dynamic loading and for ELF acc
3001 function-relative symbols. */
3002 valu += function_start_offset;
3004 /* GCC 2.95.3 emits the first N_SLINE stab somwehere in the
3005 middle of the prologue instead of right at the start of the
3006 function. To deal with this we record the address for the
3007 first N_SLINE stab to be the start of the function instead of
3008 the listed location. We really shouldn't to this. When
3009 compiling with optimization, this first N_SLINE stab might be
3010 optimized away. Other (non-GCC) compilers don't emit this
3011 stab at all. There is no real harm in having an extra
3012 numbered line, although it can be a bit annoying for the
3013 user. However, it totally screws up our testsuite.
3015 So for now, keep adjusting the address of the first N_SLINE
3016 stab, but only for code compiled with GCC. */
3018 if (within_function && sline_found_in_function == 0)
3020 CORE_ADDR addr = processing_gcc_compilation == 2 ?
3021 last_function_start : valu;
3023 record_line (current_subfile, desc,
3024 gdbarch_addr_bits_remove (gdbarch, addr));
3025 sline_found_in_function = 1;
3028 record_line (current_subfile, desc,
3029 gdbarch_addr_bits_remove (gdbarch, valu));
3033 common_block_start (name, objfile);
3037 common_block_end (objfile);
3040 /* The following symbol types need to have the appropriate
3041 offset added to their value; then we process symbol
3042 definitions in the name. */
3044 case N_STSYM: /* Static symbol in data segment. */
3045 case N_LCSYM: /* Static symbol in BSS segment. */
3046 case N_ROSYM: /* Static symbol in read-only data segment. */
3047 /* HORRID HACK DEPT. However, it's Sun's furgin' fault.
3048 Solaris 2's stabs-in-elf makes *most* symbols relative but
3049 leaves a few absolute (at least for Solaris 2.1 and version
3050 2.0.1 of the SunPRO compiler). N_STSYM and friends sit on
3051 the fence. .stab "foo:S...",N_STSYM is absolute (ld
3052 relocates it) .stab "foo:V...",N_STSYM is relative (section
3053 base subtracted). This leaves us no choice but to search for
3054 the 'S' or 'V'... (or pass the whole section_offsets stuff
3055 down ONE MORE function call level, which we really don't want
3060 /* Normal object file and NLMs have non-zero text seg offsets,
3061 but don't need their static syms offset in this fashion.
3062 XXX - This is really a crock that should be fixed in the
3063 solib handling code so that I don't have to work around it
3066 if (!symfile_relocatable)
3068 p = strchr (name, ':');
3069 if (p != 0 && p[1] == 'S')
3071 /* The linker relocated it. We don't want to add an
3072 elfstab_offset_sections-type offset, but we *do*
3073 want to add whatever solib.c passed to
3074 symbol_file_add as addr (this is known to affect
3075 SunOS 4, and I suspect ELF too). Since
3076 elfstab_offset_sections currently does not muck
3077 with the text offset (there is no Ttext.text
3078 symbol), we can get addr from the text offset. If
3079 elfstab_offset_sections ever starts dealing with
3080 the text offset, and we still need to do this, we
3081 need to invent a SECT_OFF_ADDR_KLUDGE or something. */
3082 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
3083 goto define_a_symbol;
3086 /* Since it's not the kludge case, re-dispatch to the right
3097 internal_error (__FILE__, __LINE__,
3098 _("failed internal consistency check"));
3102 case_N_STSYM: /* Static symbol in data segment. */
3103 case N_DSLINE: /* Source line number, data segment. */
3104 valu += ANOFFSET (section_offsets, SECT_OFF_DATA (objfile));
3105 goto define_a_symbol;
3107 case_N_LCSYM: /* Static symbol in BSS segment. */
3108 case N_BSLINE: /* Source line number, BSS segment. */
3109 /* N_BROWS: overlaps with N_BSLINE. */
3110 valu += ANOFFSET (section_offsets, SECT_OFF_BSS (objfile));
3111 goto define_a_symbol;
3113 case_N_ROSYM: /* Static symbol in read-only data segment. */
3114 valu += ANOFFSET (section_offsets, SECT_OFF_RODATA (objfile));
3115 goto define_a_symbol;
3117 case N_ENTRY: /* Alternate entry point. */
3118 /* Relocate for dynamic loading. */
3119 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
3120 goto define_a_symbol;
3122 /* The following symbol types we don't know how to process.
3123 Handle them in a "default" way, but complain to people who
3126 case N_CATCH: /* Exception handler catcher. */
3127 case N_EHDECL: /* Exception handler name. */
3128 case N_PC: /* Global symbol in Pascal. */
3129 case N_M2C: /* Modula-2 compilation unit. */
3130 /* N_MOD2: overlaps with N_EHDECL. */
3131 case N_SCOPE: /* Modula-2 scope information. */
3132 case N_ECOML: /* End common (local name). */
3133 case N_NBTEXT: /* Gould Non-Base-Register symbols??? */
3138 unknown_symtype_complaint (hex_string (type));
3141 /* The following symbol types don't need the address field
3142 relocated, since it is either unused, or is absolute. */
3144 case N_GSYM: /* Global variable. */
3145 case N_NSYMS: /* Number of symbols (Ultrix). */
3146 case N_NOMAP: /* No map? (Ultrix). */
3147 case N_RSYM: /* Register variable. */
3148 case N_DEFD: /* Modula-2 GNU module dependency. */
3149 case N_SSYM: /* Struct or union element. */
3150 case N_LSYM: /* Local symbol in stack. */
3151 case N_PSYM: /* Parameter variable. */
3152 case N_LENG: /* Length of preceding symbol type. */
3156 char *colon_pos = strchr (name, ':');
3158 if (colon_pos == NULL)
3161 deftype = colon_pos[1];
3167 function_stab_type = type;
3169 /* Deal with the SunPRO 3.0 compiler which omits the
3170 address from N_FUN symbols. */
3172 && valu == ANOFFSET (section_offsets,
3173 SECT_OFF_TEXT (objfile))
3174 && gdbarch_sofun_address_maybe_missing (gdbarch))
3176 CORE_ADDR minsym_valu =
3177 find_stab_function_addr (name, get_last_source_file (),
3180 /* The function find_stab_function_addr will return
3181 0 if the minimal symbol wasn't found.
3182 (Unfortunately, this might also be a valid
3183 address.) Anyway, if it *does* return 0, it is
3184 likely that the value was set correctly to begin
3186 if (minsym_valu != 0)
3190 if (block_address_function_relative)
3191 /* For Solaris 2 compilers, the block addresses and
3192 N_SLINE's are relative to the start of the
3193 function. On normal systems, and when using GCC on
3194 Solaris 2, these addresses are just absolute, or
3195 relative to the N_SO, depending on
3196 BLOCK_ADDRESS_ABSOLUTE. */
3197 function_start_offset = valu;
3199 within_function = 1;
3201 if (context_stack_depth > 1)
3203 complaint (&symfile_complaints,
3204 _("unmatched N_LBRAC before symtab pos %d"),
3209 if (context_stack_depth > 0)
3211 struct block *block;
3213 new = pop_context ();
3214 /* Make a block for the local symbols within. */
3215 block = finish_block (new->name, &local_symbols,
3216 new->old_blocks, new->start_addr,
3219 /* For C++, set the block's scope. */
3220 if (SYMBOL_LANGUAGE (new->name) == language_cplus)
3221 cp_set_block_scope (new->name, block,
3222 &objfile->objfile_obstack,
3226 new = push_context (0, valu);
3227 new->name = define_symbol (valu, name, desc, type, objfile);
3231 define_symbol (valu, name, desc, type, objfile);
3237 /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it
3238 for a bunch of other flags, too. Someday we may parse their
3239 flags; for now we ignore theirs and hope they'll ignore ours. */
3240 case N_OPT: /* Solaris 2: Compiler options. */
3243 if (strcmp (name, GCC2_COMPILED_FLAG_SYMBOL) == 0)
3245 processing_gcc_compilation = 2;
3246 #if 0 /* Works, but is experimental. -fnf */
3247 /* For now, stay with AUTO_DEMANGLING for g++ output, as
3248 we don't know whether it will use the old style or v3
3250 if (AUTO_DEMANGLING)
3252 set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
3261 case N_MAIN: /* Name of main routine. */
3262 /* FIXME: If one has a symbol file with N_MAIN and then replaces
3263 it with a symbol file with "main" and without N_MAIN. I'm
3264 not sure exactly what rule to follow but probably something
3265 like: N_MAIN takes precedence over "main" no matter what
3266 objfile it is in; If there is more than one N_MAIN, choose
3267 the one in the symfile_objfile; If there is more than one
3268 N_MAIN within a given objfile, complain() and choose
3269 arbitrarily. (kingdon) */
3271 set_main_name (name);
3274 /* The following symbol types can be ignored. */
3275 case N_OBJ: /* Solaris 2: Object file dir and name. */
3276 case N_PATCH: /* Solaris 2: Patch Run Time Checker. */
3277 /* N_UNDF: Solaris 2: File separator mark. */
3278 /* N_UNDF: -- we will never encounter it, since we only process
3279 one file's symbols at once. */
3280 case N_ENDM: /* Solaris 2: End of module. */
3281 case N_ALIAS: /* SunPro F77: alias name, ignore for now. */
3285 /* '#' is a GNU C extension to allow one symbol to refer to another
3288 Generally this is used so that an alias can refer to its main
3293 /* Initialize symbol reference names and determine if this is a
3294 definition. If a symbol reference is being defined, go ahead
3295 and add it. Otherwise, just return. */
3300 /* If this stab defines a new reference ID that is not on the
3301 reference list, then put it on the reference list.
3303 We go ahead and advance NAME past the reference, even though
3304 it is not strictly necessary at this time. */
3305 refnum = symbol_reference_defined (&s);
3307 if (!ref_search (refnum))
3308 ref_add (refnum, 0, name, valu);
3312 previous_stab_code = type;
3315 /* FIXME: The only difference between this and elfstab_build_psymtabs
3316 is the call to install_minimal_symbols for elf, and the support for
3317 split sections. If the differences are really that small, the code
3318 should be shared. */
3320 /* Scan and build partial symbols for an coff symbol file.
3321 The coff file has already been processed to get its minimal symbols.
3323 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3326 OBJFILE is the object file we are reading symbols from.
3327 ADDR is the address relative to which the symbols are (e.g.
3328 the base address of the text segment).
3329 TEXTADDR is the address of the text section.
3330 TEXTSIZE is the size of the text section.
3331 STABSECTS is the list of .stab sections in OBJFILE.
3332 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3333 .stabstr section exists.
3335 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3336 adjusted for coff details. */
3339 coffstab_build_psymtabs (struct objfile *objfile,
3340 CORE_ADDR textaddr, unsigned int textsize,
3341 struct stab_section_list *stabsects,
3342 file_ptr stabstroffset, unsigned int stabstrsize)
3345 bfd *sym_bfd = objfile->obfd;
3346 char *name = bfd_get_filename (sym_bfd);
3347 struct dbx_symfile_info *info;
3348 unsigned int stabsize;
3350 /* There is already a dbx_symfile_info allocated by our caller.
3351 It might even contain some info from the coff symtab to help us. */
3352 info = DBX_SYMFILE_INFO (objfile);
3354 DBX_TEXT_ADDR (objfile) = textaddr;
3355 DBX_TEXT_SIZE (objfile) = textsize;
3357 #define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3358 DBX_SYMBOL_SIZE (objfile) = COFF_STABS_SYMBOL_SIZE;
3359 DBX_STRINGTAB_SIZE (objfile) = stabstrsize;
3361 if (stabstrsize > bfd_get_size (sym_bfd))
3362 error (_("ridiculous string table size: %d bytes"), stabstrsize);
3363 DBX_STRINGTAB (objfile) = (char *)
3364 obstack_alloc (&objfile->objfile_obstack, stabstrsize + 1);
3365 OBJSTAT (objfile, sz_strtab += stabstrsize + 1);
3367 /* Now read in the string table in one big gulp. */
3369 val = bfd_seek (sym_bfd, stabstroffset, SEEK_SET);
3371 perror_with_name (name);
3372 val = bfd_bread (DBX_STRINGTAB (objfile), stabstrsize, sym_bfd);
3373 if (val != stabstrsize)
3374 perror_with_name (name);
3376 stabsread_new_init ();
3377 buildsym_new_init ();
3378 free_header_files ();
3379 init_header_files ();
3381 processing_acc_compilation = 1;
3383 /* In a coff file, we've already installed the minimal symbols that came
3384 from the coff (non-stab) symbol table, so always act like an
3385 incremental load here. */
3386 if (stabsects->next == NULL)
3388 stabsize = bfd_section_size (sym_bfd, stabsects->section);
3389 DBX_SYMCOUNT (objfile) = stabsize / DBX_SYMBOL_SIZE (objfile);
3390 DBX_SYMTAB_OFFSET (objfile) = stabsects->section->filepos;
3394 struct stab_section_list *stabsect;
3396 DBX_SYMCOUNT (objfile) = 0;
3397 for (stabsect = stabsects; stabsect != NULL; stabsect = stabsect->next)
3399 stabsize = bfd_section_size (sym_bfd, stabsect->section);
3400 DBX_SYMCOUNT (objfile) += stabsize / DBX_SYMBOL_SIZE (objfile);
3403 DBX_SYMTAB_OFFSET (objfile) = stabsects->section->filepos;
3405 symbuf_sections = stabsects->next;
3406 symbuf_left = bfd_section_size (sym_bfd, stabsects->section);
3410 dbx_symfile_read (objfile, 0);
3413 /* Scan and build partial symbols for an ELF symbol file.
3414 This ELF file has already been processed to get its minimal symbols.
3416 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3419 OBJFILE is the object file we are reading symbols from.
3420 ADDR is the address relative to which the symbols are (e.g.
3421 the base address of the text segment).
3422 STABSECT is the BFD section information for the .stab section.
3423 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3424 .stabstr section exists.
3426 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3427 adjusted for elf details. */
3430 elfstab_build_psymtabs (struct objfile *objfile, asection *stabsect,
3431 file_ptr stabstroffset, unsigned int stabstrsize)
3434 bfd *sym_bfd = objfile->obfd;
3435 char *name = bfd_get_filename (sym_bfd);
3436 struct dbx_symfile_info *info;
3437 struct cleanup *back_to = make_cleanup (null_cleanup, NULL);
3439 /* There is already a dbx_symfile_info allocated by our caller.
3440 It might even contain some info from the ELF symtab to help us. */
3441 info = DBX_SYMFILE_INFO (objfile);
3443 /* Find the first and last text address. dbx_symfile_read seems to
3445 find_text_range (sym_bfd, objfile);
3447 #define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3448 DBX_SYMBOL_SIZE (objfile) = ELF_STABS_SYMBOL_SIZE;
3449 DBX_SYMCOUNT (objfile)
3450 = bfd_section_size (objfile->obfd, stabsect) / DBX_SYMBOL_SIZE (objfile);
3451 DBX_STRINGTAB_SIZE (objfile) = stabstrsize;
3452 DBX_SYMTAB_OFFSET (objfile) = stabsect->filepos;
3453 DBX_STAB_SECTION (objfile) = stabsect;
3455 if (stabstrsize > bfd_get_size (sym_bfd))
3456 error (_("ridiculous string table size: %d bytes"), stabstrsize);
3457 DBX_STRINGTAB (objfile) = (char *)
3458 obstack_alloc (&objfile->objfile_obstack, stabstrsize + 1);
3459 OBJSTAT (objfile, sz_strtab += stabstrsize + 1);
3461 /* Now read in the string table in one big gulp. */
3463 val = bfd_seek (sym_bfd, stabstroffset, SEEK_SET);
3465 perror_with_name (name);
3466 val = bfd_bread (DBX_STRINGTAB (objfile), stabstrsize, sym_bfd);
3467 if (val != stabstrsize)
3468 perror_with_name (name);
3470 stabsread_new_init ();
3471 buildsym_new_init ();
3472 free_header_files ();
3473 init_header_files ();
3475 processing_acc_compilation = 1;
3478 symbuf_left = bfd_section_size (objfile->obfd, stabsect);
3479 stabs_data = symfile_relocate_debug_section (objfile, stabsect, NULL);
3481 make_cleanup (free_current_contents, (void *) &stabs_data);
3483 /* In an elf file, we've already installed the minimal symbols that came
3484 from the elf (non-stab) symbol table, so always act like an
3485 incremental load here. dbx_symfile_read should not generate any new
3486 minimal symbols, since we will have already read the ELF dynamic symbol
3487 table and normal symbol entries won't be in the ".stab" section; but in
3488 case it does, it will install them itself. */
3489 dbx_symfile_read (objfile, 0);
3491 do_cleanups (back_to);
3494 /* Scan and build partial symbols for a file with special sections for stabs
3495 and stabstrings. The file has already been processed to get its minimal
3496 symbols, and any other symbols that might be necessary to resolve GSYMs.
3498 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3501 OBJFILE is the object file we are reading symbols from.
3502 ADDR is the address relative to which the symbols are (e.g. the base address
3503 of the text segment).
3504 STAB_NAME is the name of the section that contains the stabs.
3505 STABSTR_NAME is the name of the section that contains the stab strings.
3507 This routine is mostly copied from dbx_symfile_init and
3508 dbx_symfile_read. */
3511 stabsect_build_psymtabs (struct objfile *objfile, char *stab_name,
3512 char *stabstr_name, char *text_name)
3515 bfd *sym_bfd = objfile->obfd;
3516 char *name = bfd_get_filename (sym_bfd);
3518 asection *stabstrsect;
3519 asection *text_sect;
3520 struct dbx_symfile_info *dbx;
3522 stabsect = bfd_get_section_by_name (sym_bfd, stab_name);
3523 stabstrsect = bfd_get_section_by_name (sym_bfd, stabstr_name);
3529 error (_("stabsect_build_psymtabs: Found stabs (%s), "
3530 "but not string section (%s)"),
3531 stab_name, stabstr_name);
3533 dbx = XCNEW (struct dbx_symfile_info);
3534 set_objfile_data (objfile, dbx_objfile_data_key, dbx);
3536 text_sect = bfd_get_section_by_name (sym_bfd, text_name);
3538 error (_("Can't find %s section in symbol file"), text_name);
3539 DBX_TEXT_ADDR (objfile) = bfd_section_vma (sym_bfd, text_sect);
3540 DBX_TEXT_SIZE (objfile) = bfd_section_size (sym_bfd, text_sect);
3542 DBX_SYMBOL_SIZE (objfile) = sizeof (struct external_nlist);
3543 DBX_SYMCOUNT (objfile) = bfd_section_size (sym_bfd, stabsect)
3544 / DBX_SYMBOL_SIZE (objfile);
3545 DBX_STRINGTAB_SIZE (objfile) = bfd_section_size (sym_bfd, stabstrsect);
3546 DBX_SYMTAB_OFFSET (objfile) = stabsect->filepos; /* XXX - FIXME: POKING
3550 if (DBX_STRINGTAB_SIZE (objfile) > bfd_get_size (sym_bfd))
3551 error (_("ridiculous string table size: %d bytes"),
3552 DBX_STRINGTAB_SIZE (objfile));
3553 DBX_STRINGTAB (objfile) = (char *)
3554 obstack_alloc (&objfile->objfile_obstack,
3555 DBX_STRINGTAB_SIZE (objfile) + 1);
3556 OBJSTAT (objfile, sz_strtab += DBX_STRINGTAB_SIZE (objfile) + 1);
3558 /* Now read in the string table in one big gulp. */
3560 val = bfd_get_section_contents (sym_bfd, /* bfd */
3561 stabstrsect, /* bfd section */
3562 DBX_STRINGTAB (objfile), /* input buffer */
3563 0, /* offset into section */
3564 DBX_STRINGTAB_SIZE (objfile)); /* amount to
3568 perror_with_name (name);
3570 stabsread_new_init ();
3571 buildsym_new_init ();
3572 free_header_files ();
3573 init_header_files ();
3575 /* Now, do an incremental load. */
3577 processing_acc_compilation = 1;
3578 dbx_symfile_read (objfile, 0);
3581 static const struct sym_fns aout_sym_fns =
3583 bfd_target_aout_flavour,
3584 dbx_new_init, /* init anything gbl to entire symtab */
3585 dbx_symfile_init, /* read initial info, setup for sym_read() */
3586 dbx_symfile_read, /* read a symbol file into symtab */
3587 NULL, /* sym_read_psymbols */
3588 dbx_symfile_finish, /* finished with file, cleanup */
3589 default_symfile_offsets, /* parse user's offsets to internal form */
3590 default_symfile_segments, /* Get segment information from a file. */
3592 default_symfile_relocate, /* Relocate a debug section. */
3593 NULL, /* sym_probe_fns */
3598 _initialize_dbxread (void)
3600 add_symtab_fns (&aout_sym_fns);
3602 dbx_objfile_data_key
3603 = register_objfile_data_with_cleanup (NULL, dbx_free_symfile_info);