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"
60 #include "gdb_assert.h"
61 #include "gdb_string.h"
63 #include "aout/aout64.h"
64 #include "aout/stab_gnu.h" /* We always use GNU stabs, not
68 /* Key for dbx-associated data. */
70 const struct objfile_data *dbx_objfile_data_key;
72 /* We put a pointer to this structure in the read_symtab_private field
77 /* Offset within the file symbol table of first local symbol for this
82 /* Length (in bytes) of the section of the symbol table devoted to
83 this file's symbols (actually, the section bracketed may contain
84 more than just this file's symbols). If ldsymlen is 0, the only
85 reason for this thing's existence is the dependency list. Nothing
86 else will happen when it is read in. */
90 /* The size of each symbol in the symbol file (in external form). */
94 /* Further information needed to locate the symbols if they are in
99 int file_string_offset;
102 #define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff)
103 #define LDSYMLEN(p) (((struct symloc *)((p)->read_symtab_private))->ldsymlen)
104 #define SYMLOC(p) ((struct symloc *)((p)->read_symtab_private))
105 #define SYMBOL_SIZE(p) (SYMLOC(p)->symbol_size)
106 #define SYMBOL_OFFSET(p) (SYMLOC(p)->symbol_offset)
107 #define STRING_OFFSET(p) (SYMLOC(p)->string_offset)
108 #define FILE_STRING_OFFSET(p) (SYMLOC(p)->file_string_offset)
111 /* The objfile we are currently reading. */
113 static struct objfile *dbxread_objfile;
115 /* Remember what we deduced to be the source language of this psymtab. */
117 static enum language psymtab_language = language_unknown;
119 /* The BFD for this file -- implicit parameter to next_symbol_text. */
121 static bfd *symfile_bfd;
123 /* The size of each symbol in the symbol file (in external form).
124 This is set by dbx_symfile_read when building psymtabs, and by
125 dbx_psymtab_to_symtab when building symtabs. */
127 static unsigned symbol_size;
129 /* This is the offset of the symbol table in the executable file. */
131 static unsigned symbol_table_offset;
133 /* This is the offset of the string table in the executable file. */
135 static unsigned string_table_offset;
137 /* For elf+stab executables, the n_strx field is not a simple index
138 into the string table. Instead, each .o file has a base offset in
139 the string table, and the associated symbols contain offsets from
140 this base. The following two variables contain the base offset for
141 the current and next .o files. */
143 static unsigned int file_string_table_offset;
144 static unsigned int next_file_string_table_offset;
146 /* .o and NLM files contain unrelocated addresses which are based at
147 0. When non-zero, this flag disables some of the special cases for
148 Solaris elf+stab text addresses at location 0. */
150 static int symfile_relocatable = 0;
152 /* If this is nonzero, N_LBRAC, N_RBRAC, and N_SLINE entries are
153 relative to the function start address. */
155 static int block_address_function_relative = 0;
157 /* The lowest text address we have yet encountered. This is needed
158 because in an a.out file, there is no header field which tells us
159 what address the program is actually going to be loaded at, so we
160 need to make guesses based on the symbols (which *are* relocated to
161 reflect the address it will be loaded at). */
163 static CORE_ADDR lowest_text_address;
165 /* Non-zero if there is any line number info in the objfile. Prevents
166 end_psymtab from discarding an otherwise empty psymtab. */
168 static int has_line_numbers;
170 /* Complaints about the symbols we have encountered. */
173 unknown_symtype_complaint (const char *arg1)
175 complaint (&symfile_complaints, _("unknown symbol type %s"), arg1);
179 lbrac_mismatch_complaint (int arg1)
181 complaint (&symfile_complaints,
182 _("N_LBRAC/N_RBRAC symbol mismatch at symtab pos %d"), arg1);
186 repeated_header_complaint (const char *arg1, int arg2)
188 complaint (&symfile_complaints,
189 _("\"repeated\" header file %s not "
190 "previously seen, at symtab pos %d"),
194 /* find_text_range --- find start and end of loadable code sections
196 The find_text_range function finds the shortest address range that
197 encloses all sections containing executable code, and stores it in
198 objfile's text_addr and text_size members.
200 dbx_symfile_read will use this to finish off the partial symbol
201 table, in some cases. */
204 find_text_range (bfd * sym_bfd, struct objfile *objfile)
211 for (sec = sym_bfd->sections; sec; sec = sec->next)
212 if (bfd_get_section_flags (sym_bfd, sec) & SEC_CODE)
214 CORE_ADDR sec_start = bfd_section_vma (sym_bfd, sec);
215 CORE_ADDR sec_end = sec_start + bfd_section_size (sym_bfd, sec);
219 if (sec_start < start)
234 error (_("Can't find any code sections in symbol file"));
236 DBX_TEXT_ADDR (objfile) = start;
237 DBX_TEXT_SIZE (objfile) = end - start;
242 /* During initial symbol readin, we need to have a structure to keep
243 track of which psymtabs have which bincls in them. This structure
244 is used during readin to setup the list of dependencies within each
245 partial symbol table. */
247 struct header_file_location
249 char *name; /* Name of header file */
250 int instance; /* See above */
251 struct partial_symtab *pst; /* Partial symtab that has the
252 BINCL/EINCL defs for this file. */
255 /* The actual list and controling variables. */
256 static struct header_file_location *bincl_list, *next_bincl;
257 static int bincls_allocated;
259 /* Local function prototypes. */
261 extern void _initialize_dbxread (void);
263 static void read_ofile_symtab (struct objfile *, struct partial_symtab *);
265 static void dbx_read_symtab (struct partial_symtab *self,
266 struct objfile *objfile);
268 static void dbx_psymtab_to_symtab_1 (struct objfile *, struct partial_symtab *);
270 static void read_dbx_dynamic_symtab (struct objfile *objfile);
272 static void read_dbx_symtab (struct objfile *);
274 static void free_bincl_list (struct objfile *);
276 static struct partial_symtab *find_corresponding_bincl_psymtab (char *, int);
278 static void add_bincl_to_list (struct partial_symtab *, char *, int);
280 static void init_bincl_list (int, struct objfile *);
282 static char *dbx_next_symbol_text (struct objfile *);
284 static void fill_symbuf (bfd *);
286 static void dbx_symfile_init (struct objfile *);
288 static void dbx_new_init (struct objfile *);
290 static void dbx_symfile_read (struct objfile *, int);
292 static void dbx_symfile_finish (struct objfile *);
294 static void record_minimal_symbol (char *, CORE_ADDR, int, struct objfile *);
296 static void add_new_header_file (char *, int);
298 static void add_old_header_file (char *, int);
300 static void add_this_object_header_file (int);
302 static struct partial_symtab *start_psymtab (struct objfile *, char *,
304 struct partial_symbol **,
305 struct partial_symbol **);
307 /* Free up old header file tables. */
310 free_header_files (void)
312 if (this_object_header_files)
314 xfree (this_object_header_files);
315 this_object_header_files = NULL;
317 n_allocated_this_object_header_files = 0;
320 /* Allocate new header file tables. */
323 init_header_files (void)
325 n_allocated_this_object_header_files = 10;
326 this_object_header_files = (int *) xmalloc (10 * sizeof (int));
329 /* Add header file number I for this object file
330 at the next successive FILENUM. */
333 add_this_object_header_file (int i)
335 if (n_this_object_header_files == n_allocated_this_object_header_files)
337 n_allocated_this_object_header_files *= 2;
338 this_object_header_files
339 = (int *) xrealloc ((char *) this_object_header_files,
340 n_allocated_this_object_header_files * sizeof (int));
343 this_object_header_files[n_this_object_header_files++] = i;
346 /* Add to this file an "old" header file, one already seen in
347 a previous object file. NAME is the header file's name.
348 INSTANCE is its instance code, to select among multiple
349 symbol tables for the same header file. */
352 add_old_header_file (char *name, int instance)
354 struct header_file *p = HEADER_FILES (dbxread_objfile);
357 for (i = 0; i < N_HEADER_FILES (dbxread_objfile); i++)
358 if (filename_cmp (p[i].name, name) == 0 && instance == p[i].instance)
360 add_this_object_header_file (i);
363 repeated_header_complaint (name, symnum);
366 /* Add to this file a "new" header file: definitions for its types follow.
367 NAME is the header file's name.
368 Most often this happens only once for each distinct header file,
369 but not necessarily. If it happens more than once, INSTANCE has
370 a different value each time, and references to the header file
371 use INSTANCE values to select among them.
373 dbx output contains "begin" and "end" markers for each new header file,
374 but at this level we just need to know which files there have been;
375 so we record the file when its "begin" is seen and ignore the "end". */
378 add_new_header_file (char *name, int instance)
381 struct header_file *hfile;
383 /* Make sure there is room for one more header file. */
385 i = N_ALLOCATED_HEADER_FILES (dbxread_objfile);
387 if (N_HEADER_FILES (dbxread_objfile) == i)
391 N_ALLOCATED_HEADER_FILES (dbxread_objfile) = 10;
392 HEADER_FILES (dbxread_objfile) = (struct header_file *)
393 xmalloc (10 * sizeof (struct header_file));
398 N_ALLOCATED_HEADER_FILES (dbxread_objfile) = i;
399 HEADER_FILES (dbxread_objfile) = (struct header_file *)
400 xrealloc ((char *) HEADER_FILES (dbxread_objfile),
401 (i * sizeof (struct header_file)));
405 /* Create an entry for this header file. */
407 i = N_HEADER_FILES (dbxread_objfile)++;
408 hfile = HEADER_FILES (dbxread_objfile) + i;
409 hfile->name = xstrdup (name);
410 hfile->instance = instance;
413 = (struct type **) xmalloc (10 * sizeof (struct type *));
414 memset (hfile->vector, 0, 10 * sizeof (struct type *));
416 add_this_object_header_file (i);
420 static struct type **
421 explicit_lookup_type (int real_filenum, int index)
423 struct header_file *f = &HEADER_FILES (dbxread_objfile)[real_filenum];
425 if (index >= f->length)
428 f->vector = (struct type **)
429 xrealloc (f->vector, f->length * sizeof (struct type *));
430 memset (&f->vector[f->length / 2],
431 '\0', f->length * sizeof (struct type *) / 2);
433 return &f->vector[index];
438 record_minimal_symbol (char *name, CORE_ADDR address, int type,
439 struct objfile *objfile)
441 enum minimal_symbol_type ms_type;
443 asection *bfd_section;
449 section = SECT_OFF_TEXT (objfile);
450 bfd_section = DBX_TEXT_SECTION (objfile);
454 section = SECT_OFF_DATA (objfile);
455 bfd_section = DBX_DATA_SECTION (objfile);
459 section = SECT_OFF_BSS (objfile);
460 bfd_section = DBX_BSS_SECTION (objfile);
470 section = SECT_OFF_DATA (objfile);
471 bfd_section = DBX_DATA_SECTION (objfile);
474 /* I don't think this type actually exists; since a N_SETV is the result
475 of going over many .o files, it doesn't make sense to have one
477 ms_type = mst_file_data;
478 section = SECT_OFF_DATA (objfile);
479 bfd_section = DBX_DATA_SECTION (objfile);
486 ms_type = mst_file_text;
487 section = SECT_OFF_TEXT (objfile);
488 bfd_section = DBX_TEXT_SECTION (objfile);
491 ms_type = mst_file_data;
493 /* Check for __DYNAMIC, which is used by Sun shared libraries.
494 Record it as global even if it's local, not global, so
495 lookup_minimal_symbol can find it. We don't check symbol_leading_char
496 because for SunOS4 it always is '_'. */
497 if (name[8] == 'C' && strcmp ("__DYNAMIC", name) == 0)
500 /* Same with virtual function tables, both global and static. */
502 char *tempstring = name;
504 if (tempstring[0] == bfd_get_symbol_leading_char (objfile->obfd))
506 if (is_vtable_name (tempstring))
509 section = SECT_OFF_DATA (objfile);
510 bfd_section = DBX_DATA_SECTION (objfile);
513 ms_type = mst_file_bss;
514 section = SECT_OFF_BSS (objfile);
515 bfd_section = DBX_BSS_SECTION (objfile);
518 ms_type = mst_unknown;
524 if ((ms_type == mst_file_text || ms_type == mst_text)
525 && address < lowest_text_address)
526 lowest_text_address = address;
528 prim_record_minimal_symbol_and_info
529 (name, address, ms_type, section, bfd_section, objfile);
532 /* Scan and build partial symbols for a symbol file.
533 We have been initialized by a call to dbx_symfile_init, which
534 put all the relevant info into a "struct dbx_symfile_info",
535 hung off the objfile structure. */
538 dbx_symfile_read (struct objfile *objfile, int symfile_flags)
542 struct cleanup *back_to;
544 sym_bfd = objfile->obfd;
546 /* .o and .nlm files are relocatables with text, data and bss segs based at
547 0. This flag disables special (Solaris stabs-in-elf only) fixups for
548 symbols with a value of 0. */
550 symfile_relocatable = bfd_get_file_flags (sym_bfd) & HAS_RELOC;
552 /* This is true for Solaris (and all other systems which put stabs
553 in sections, hopefully, since it would be silly to do things
554 differently from Solaris), and false for SunOS4 and other a.out
556 block_address_function_relative =
557 ((0 == strncmp (bfd_get_target (sym_bfd), "elf", 3))
558 || (0 == strncmp (bfd_get_target (sym_bfd), "som", 3))
559 || (0 == strncmp (bfd_get_target (sym_bfd), "coff", 4))
560 || (0 == strncmp (bfd_get_target (sym_bfd), "pe", 2))
561 || (0 == strncmp (bfd_get_target (sym_bfd), "epoc-pe", 7))
562 || (0 == strncmp (bfd_get_target (sym_bfd), "nlm", 3)));
564 val = bfd_seek (sym_bfd, DBX_SYMTAB_OFFSET (objfile), SEEK_SET);
566 perror_with_name (objfile->name);
568 /* Size the symbol table. */
569 if (objfile->global_psymbols.size == 0 && objfile->static_psymbols.size == 0)
570 init_psymbol_list (objfile, DBX_SYMCOUNT (objfile));
572 symbol_size = DBX_SYMBOL_SIZE (objfile);
573 symbol_table_offset = DBX_SYMTAB_OFFSET (objfile);
575 free_pending_blocks ();
576 back_to = make_cleanup (really_free_pendings, 0);
578 init_minimal_symbol_collection ();
579 make_cleanup_discard_minimal_symbols ();
581 /* Read stabs data from executable file and define symbols. */
583 read_dbx_symtab (objfile);
585 /* Add the dynamic symbols. */
587 read_dbx_dynamic_symtab (objfile);
589 /* Install any minimal symbols that have been collected as the current
590 minimal symbols for this objfile. */
592 install_minimal_symbols (objfile);
594 do_cleanups (back_to);
597 /* Initialize anything that needs initializing when a completely new
598 symbol file is specified (not just adding some symbols from another
599 file, e.g. a shared library). */
602 dbx_new_init (struct objfile *ignore)
604 stabsread_new_init ();
605 buildsym_new_init ();
606 init_header_files ();
610 /* dbx_symfile_init ()
611 is the dbx-specific initialization routine for reading symbols.
612 It is passed a struct objfile which contains, among other things,
613 the BFD for the file whose symbols are being read, and a slot for a pointer
614 to "private data" which we fill with goodies.
616 We read the string table into malloc'd space and stash a pointer to it.
618 Since BFD doesn't know how to read debug symbols in a format-independent
619 way (and may never do so...), we have to do it ourselves. We will never
620 be called unless this is an a.out (or very similar) file.
621 FIXME, there should be a cleaner peephole into the BFD environment here. */
623 #define DBX_STRINGTAB_SIZE_SIZE sizeof(long) /* FIXME */
626 dbx_symfile_init (struct objfile *objfile)
629 bfd *sym_bfd = objfile->obfd;
630 char *name = bfd_get_filename (sym_bfd);
632 unsigned char size_temp[DBX_STRINGTAB_SIZE_SIZE];
633 struct dbx_symfile_info *dbx;
635 /* Allocate struct to keep track of the symfile. */
636 dbx = XCNEW (struct dbx_symfile_info);
637 set_objfile_data (objfile, dbx_objfile_data_key, dbx);
639 DBX_TEXT_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".text");
640 DBX_DATA_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".data");
641 DBX_BSS_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".bss");
643 /* FIXME POKING INSIDE BFD DATA STRUCTURES. */
644 #define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd))
645 #define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd))
647 /* FIXME POKING INSIDE BFD DATA STRUCTURES. */
649 DBX_SYMFILE_INFO (objfile)->stab_section_info = NULL;
651 text_sect = bfd_get_section_by_name (sym_bfd, ".text");
653 error (_("Can't find .text section in symbol file"));
654 DBX_TEXT_ADDR (objfile) = bfd_section_vma (sym_bfd, text_sect);
655 DBX_TEXT_SIZE (objfile) = bfd_section_size (sym_bfd, text_sect);
657 DBX_SYMBOL_SIZE (objfile) = obj_symbol_entry_size (sym_bfd);
658 DBX_SYMCOUNT (objfile) = bfd_get_symcount (sym_bfd);
659 DBX_SYMTAB_OFFSET (objfile) = SYMBOL_TABLE_OFFSET;
661 /* Read the string table and stash it away in the objfile_obstack.
662 When we blow away the objfile the string table goes away as well.
663 Note that gdb used to use the results of attempting to malloc the
664 string table, based on the size it read, as a form of sanity check
665 for botched byte swapping, on the theory that a byte swapped string
666 table size would be so totally bogus that the malloc would fail. Now
667 that we put in on the objfile_obstack, we can't do this since gdb gets
668 a fatal error (out of virtual memory) if the size is bogus. We can
669 however at least check to see if the size is less than the size of
670 the size field itself, or larger than the size of the entire file.
671 Note that all valid string tables have a size greater than zero, since
672 the bytes used to hold the size are included in the count. */
674 if (STRING_TABLE_OFFSET == 0)
676 /* It appears that with the existing bfd code, STRING_TABLE_OFFSET
677 will never be zero, even when there is no string table. This
678 would appear to be a bug in bfd. */
679 DBX_STRINGTAB_SIZE (objfile) = 0;
680 DBX_STRINGTAB (objfile) = NULL;
684 val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, SEEK_SET);
686 perror_with_name (name);
688 memset (size_temp, 0, sizeof (size_temp));
689 val = bfd_bread (size_temp, sizeof (size_temp), sym_bfd);
692 perror_with_name (name);
696 /* With the existing bfd code, STRING_TABLE_OFFSET will be set to
697 EOF if there is no string table, and attempting to read the size
698 from EOF will read zero bytes. */
699 DBX_STRINGTAB_SIZE (objfile) = 0;
700 DBX_STRINGTAB (objfile) = NULL;
704 /* Read some data that would appear to be the string table size.
705 If there really is a string table, then it is probably the right
706 size. Byteswap if necessary and validate the size. Note that
707 the minimum is DBX_STRINGTAB_SIZE_SIZE. If we just read some
708 random data that happened to be at STRING_TABLE_OFFSET, because
709 bfd can't tell us there is no string table, the sanity checks may
710 or may not catch this. */
711 DBX_STRINGTAB_SIZE (objfile) = bfd_h_get_32 (sym_bfd, size_temp);
713 if (DBX_STRINGTAB_SIZE (objfile) < sizeof (size_temp)
714 || DBX_STRINGTAB_SIZE (objfile) > bfd_get_size (sym_bfd))
715 error (_("ridiculous string table size (%d bytes)."),
716 DBX_STRINGTAB_SIZE (objfile));
718 DBX_STRINGTAB (objfile) =
719 (char *) obstack_alloc (&objfile->objfile_obstack,
720 DBX_STRINGTAB_SIZE (objfile));
721 OBJSTAT (objfile, sz_strtab += DBX_STRINGTAB_SIZE (objfile));
723 /* Now read in the string table in one big gulp. */
725 val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, SEEK_SET);
727 perror_with_name (name);
728 val = bfd_bread (DBX_STRINGTAB (objfile),
729 DBX_STRINGTAB_SIZE (objfile),
731 if (val != DBX_STRINGTAB_SIZE (objfile))
732 perror_with_name (name);
737 /* Perform any local cleanups required when we are done with a particular
738 objfile. I.E, we are in the process of discarding all symbol information
739 for an objfile, freeing up all memory held for it, and unlinking the
740 objfile struct from the global list of known objfiles. */
743 dbx_symfile_finish (struct objfile *objfile)
745 free_header_files ();
749 dbx_free_symfile_info (struct objfile *objfile, void *arg)
751 struct dbx_symfile_info *dbx = arg;
753 if (dbx->header_files != NULL)
755 int i = dbx->n_header_files;
756 struct header_file *hfiles = dbx->header_files;
760 xfree (hfiles[i].name);
761 xfree (hfiles[i].vector);
771 /* Buffer for reading the symbol table entries. */
772 static struct external_nlist symbuf[4096];
773 static int symbuf_idx;
774 static int symbuf_end;
776 /* Name of last function encountered. Used in Solaris to approximate
777 object file boundaries. */
778 static char *last_function_name;
780 /* The address in memory of the string table of the object file we are
781 reading (which might not be the "main" object file, but might be a
782 shared library or some other dynamically loaded thing). This is
783 set by read_dbx_symtab when building psymtabs, and by
784 read_ofile_symtab when building symtabs, and is used only by
785 next_symbol_text. FIXME: If that is true, we don't need it when
786 building psymtabs, right? */
787 static char *stringtab_global;
789 /* These variables are used to control fill_symbuf when the stabs
790 symbols are not contiguous (as may be the case when a COFF file is
791 linked using --split-by-reloc). */
792 static struct stab_section_list *symbuf_sections;
793 static unsigned int symbuf_left;
794 static unsigned int symbuf_read;
796 /* This variable stores a global stabs buffer, if we read stabs into
797 memory in one chunk in order to process relocations. */
798 static bfd_byte *stabs_data;
800 /* Refill the symbol table input buffer
801 and set the variables that control fetching entries from it.
802 Reports an error if no data available.
803 This function can read past the end of the symbol table
804 (into the string table) but this does no harm. */
807 fill_symbuf (bfd *sym_bfd)
814 nbytes = sizeof (symbuf);
815 if (nbytes > symbuf_left)
816 nbytes = symbuf_left;
817 memcpy (symbuf, stabs_data + symbuf_read, nbytes);
819 else if (symbuf_sections == NULL)
821 count = sizeof (symbuf);
822 nbytes = bfd_bread (symbuf, count, sym_bfd);
826 if (symbuf_left <= 0)
828 file_ptr filepos = symbuf_sections->section->filepos;
830 if (bfd_seek (sym_bfd, filepos, SEEK_SET) != 0)
831 perror_with_name (bfd_get_filename (sym_bfd));
832 symbuf_left = bfd_section_size (sym_bfd, symbuf_sections->section);
833 symbol_table_offset = filepos - symbuf_read;
834 symbuf_sections = symbuf_sections->next;
838 if (count > sizeof (symbuf))
839 count = sizeof (symbuf);
840 nbytes = bfd_bread (symbuf, count, sym_bfd);
844 perror_with_name (bfd_get_filename (sym_bfd));
845 else if (nbytes == 0)
846 error (_("Premature end of file reading symbol table"));
847 symbuf_end = nbytes / symbol_size;
849 symbuf_left -= nbytes;
850 symbuf_read += nbytes;
854 stabs_seek (int sym_offset)
858 symbuf_read += sym_offset;
859 symbuf_left -= sym_offset;
862 bfd_seek (symfile_bfd, sym_offset, SEEK_CUR);
865 #define INTERNALIZE_SYMBOL(intern, extern, abfd) \
867 (intern).n_strx = bfd_h_get_32 (abfd, (extern)->e_strx); \
868 (intern).n_type = bfd_h_get_8 (abfd, (extern)->e_type); \
869 (intern).n_other = 0; \
870 (intern).n_desc = bfd_h_get_16 (abfd, (extern)->e_desc); \
871 if (bfd_get_sign_extend_vma (abfd)) \
872 (intern).n_value = bfd_h_get_signed_32 (abfd, (extern)->e_value); \
874 (intern).n_value = bfd_h_get_32 (abfd, (extern)->e_value); \
877 /* Invariant: The symbol pointed to by symbuf_idx is the first one
878 that hasn't been swapped. Swap the symbol at the same time
879 that symbuf_idx is incremented. */
881 /* dbx allows the text of a symbol name to be continued into the
882 next symbol name! When such a continuation is encountered
883 (a \ at the end of the text of a name)
884 call this function to get the continuation. */
887 dbx_next_symbol_text (struct objfile *objfile)
889 struct internal_nlist nlist;
891 if (symbuf_idx == symbuf_end)
892 fill_symbuf (symfile_bfd);
895 INTERNALIZE_SYMBOL (nlist, &symbuf[symbuf_idx], symfile_bfd);
896 OBJSTAT (objfile, n_stabs++);
900 return nlist.n_strx + stringtab_global + file_string_table_offset;
903 /* Initialize the list of bincls to contain none and have some
907 init_bincl_list (int number, struct objfile *objfile)
909 bincls_allocated = number;
910 next_bincl = bincl_list = (struct header_file_location *)
911 xmalloc (bincls_allocated * sizeof (struct header_file_location));
914 /* Add a bincl to the list. */
917 add_bincl_to_list (struct partial_symtab *pst, char *name, int instance)
919 if (next_bincl >= bincl_list + bincls_allocated)
921 int offset = next_bincl - bincl_list;
923 bincls_allocated *= 2;
924 bincl_list = (struct header_file_location *)
925 xrealloc ((char *) bincl_list,
926 bincls_allocated * sizeof (struct header_file_location));
927 next_bincl = bincl_list + offset;
929 next_bincl->pst = pst;
930 next_bincl->instance = instance;
931 next_bincl++->name = name;
934 /* Given a name, value pair, find the corresponding
935 bincl in the list. Return the partial symtab associated
936 with that header_file_location. */
938 static struct partial_symtab *
939 find_corresponding_bincl_psymtab (char *name, int instance)
941 struct header_file_location *bincl;
943 for (bincl = bincl_list; bincl < next_bincl; bincl++)
944 if (bincl->instance == instance
945 && strcmp (name, bincl->name) == 0)
948 repeated_header_complaint (name, symnum);
949 return (struct partial_symtab *) 0;
952 /* Free the storage allocated for the bincl list. */
955 free_bincl_list (struct objfile *objfile)
958 bincls_allocated = 0;
962 do_free_bincl_list_cleanup (void *objfile)
964 free_bincl_list (objfile);
967 static struct cleanup *
968 make_cleanup_free_bincl_list (struct objfile *objfile)
970 return make_cleanup (do_free_bincl_list_cleanup, objfile);
973 /* Set namestring based on nlist. If the string table index is invalid,
974 give a fake name, and print a single error message per symbol file read,
975 rather than abort the symbol reading or flood the user with messages. */
978 set_namestring (struct objfile *objfile, const struct internal_nlist *nlist)
982 if (nlist->n_strx + file_string_table_offset
983 >= DBX_STRINGTAB_SIZE (objfile)
984 || nlist->n_strx + file_string_table_offset < nlist->n_strx)
986 complaint (&symfile_complaints,
987 _("bad string table offset in symbol %d"),
989 namestring = "<bad string table offset>";
992 namestring = (nlist->n_strx + file_string_table_offset
993 + DBX_STRINGTAB (objfile));
997 /* Scan a SunOs dynamic symbol table for symbols of interest and
998 add them to the minimal symbol table. */
1001 read_dbx_dynamic_symtab (struct objfile *objfile)
1003 bfd *abfd = objfile->obfd;
1004 struct cleanup *back_to;
1014 CORE_ADDR sym_value;
1017 /* Check that the symbol file has dynamic symbols that we know about.
1018 bfd_arch_unknown can happen if we are reading a sun3 symbol file
1019 on a sun4 host (and vice versa) and bfd is not configured
1020 --with-target=all. This would trigger an assertion in bfd/sunos.c,
1021 so we ignore the dynamic symbols in this case. */
1022 if (bfd_get_flavour (abfd) != bfd_target_aout_flavour
1023 || (bfd_get_file_flags (abfd) & DYNAMIC) == 0
1024 || bfd_get_arch (abfd) == bfd_arch_unknown)
1027 dynsym_size = bfd_get_dynamic_symtab_upper_bound (abfd);
1028 if (dynsym_size < 0)
1031 dynsyms = (asymbol **) xmalloc (dynsym_size);
1032 back_to = make_cleanup (xfree, dynsyms);
1034 dynsym_count = bfd_canonicalize_dynamic_symtab (abfd, dynsyms);
1035 if (dynsym_count < 0)
1037 do_cleanups (back_to);
1041 /* Enter dynamic symbols into the minimal symbol table
1042 if this is a stripped executable. */
1043 if (bfd_get_symcount (abfd) <= 0)
1046 for (counter = 0; counter < dynsym_count; counter++, symptr++)
1048 asymbol *sym = *symptr;
1052 sec = bfd_get_section (sym);
1054 /* BFD symbols are section relative. */
1055 sym_value = sym->value + sec->vma;
1057 if (bfd_get_section_flags (abfd, sec) & SEC_CODE)
1059 sym_value += ANOFFSET (objfile->section_offsets,
1060 SECT_OFF_TEXT (objfile));
1063 else if (bfd_get_section_flags (abfd, sec) & SEC_DATA)
1065 sym_value += ANOFFSET (objfile->section_offsets,
1066 SECT_OFF_DATA (objfile));
1069 else if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
1071 sym_value += ANOFFSET (objfile->section_offsets,
1072 SECT_OFF_BSS (objfile));
1078 if (sym->flags & BSF_GLOBAL)
1081 record_minimal_symbol ((char *) bfd_asymbol_name (sym), sym_value,
1086 /* Symbols from shared libraries have a dynamic relocation entry
1087 that points to the associated slot in the procedure linkage table.
1088 We make a mininal symbol table entry with type mst_solib_trampoline
1089 at the address in the procedure linkage table. */
1090 dynrel_size = bfd_get_dynamic_reloc_upper_bound (abfd);
1091 if (dynrel_size < 0)
1093 do_cleanups (back_to);
1097 dynrels = (arelent **) xmalloc (dynrel_size);
1098 make_cleanup (xfree, dynrels);
1100 dynrel_count = bfd_canonicalize_dynamic_reloc (abfd, dynrels, dynsyms);
1101 if (dynrel_count < 0)
1103 do_cleanups (back_to);
1107 for (counter = 0, relptr = dynrels;
1108 counter < dynrel_count;
1109 counter++, relptr++)
1111 arelent *rel = *relptr;
1113 rel->address + ANOFFSET (objfile->section_offsets,
1114 SECT_OFF_DATA (objfile));
1116 switch (bfd_get_arch (abfd))
1118 case bfd_arch_sparc:
1119 if (rel->howto->type != RELOC_JMP_SLOT)
1123 /* `16' is the type BFD produces for a jump table relocation. */
1124 if (rel->howto->type != 16)
1127 /* Adjust address in the jump table to point to
1128 the start of the bsr instruction. */
1135 name = (char *) bfd_asymbol_name (*rel->sym_ptr_ptr);
1136 prim_record_minimal_symbol (name, address, mst_solib_trampoline,
1140 do_cleanups (back_to);
1144 find_stab_function_addr (char *namestring, const char *filename,
1145 struct objfile *objfile)
1147 struct minimal_symbol *msym;
1151 p = strchr (namestring, ':');
1156 strncpy (p, namestring, n);
1159 msym = lookup_minimal_symbol (p, filename, objfile);
1162 /* Sun Fortran appends an underscore to the minimal symbol name,
1163 try again with an appended underscore if the minimal symbol
1167 msym = lookup_minimal_symbol (p, filename, objfile);
1170 if (msym == NULL && filename != NULL)
1172 /* Try again without the filename. */
1174 msym = lookup_minimal_symbol (p, NULL, objfile);
1176 if (msym == NULL && filename != NULL)
1178 /* And try again for Sun Fortran, but without the filename. */
1181 msym = lookup_minimal_symbol (p, NULL, objfile);
1184 return msym == NULL ? 0 : SYMBOL_VALUE_ADDRESS (msym);
1188 function_outside_compilation_unit_complaint (const char *arg1)
1190 complaint (&symfile_complaints,
1191 _("function `%s' appears to be defined "
1192 "outside of all compilation units"),
1196 /* Setup partial_symtab's describing each source file for which
1197 debugging information is available. */
1200 read_dbx_symtab (struct objfile *objfile)
1202 struct gdbarch *gdbarch = get_objfile_arch (objfile);
1203 struct external_nlist *bufp = 0; /* =0 avoids gcc -Wall glitch. */
1204 struct internal_nlist nlist;
1205 CORE_ADDR text_addr;
1212 int past_first_source_file = 0;
1213 CORE_ADDR last_o_file_start = 0;
1214 CORE_ADDR last_function_start = 0;
1215 struct cleanup *back_to;
1217 int textlow_not_set;
1218 int data_sect_index;
1220 /* Current partial symtab. */
1221 struct partial_symtab *pst;
1223 /* List of current psymtab's include files. */
1224 const char **psymtab_include_list;
1225 int includes_allocated;
1228 /* Index within current psymtab dependency list. */
1229 struct partial_symtab **dependency_list;
1230 int dependencies_used, dependencies_allocated;
1232 text_addr = DBX_TEXT_ADDR (objfile);
1233 text_size = DBX_TEXT_SIZE (objfile);
1235 /* FIXME. We probably want to change stringtab_global rather than add this
1236 while processing every symbol entry. FIXME. */
1237 file_string_table_offset = 0;
1238 next_file_string_table_offset = 0;
1240 stringtab_global = DBX_STRINGTAB (objfile);
1242 pst = (struct partial_symtab *) 0;
1244 includes_allocated = 30;
1246 psymtab_include_list = (const char **) alloca (includes_allocated *
1247 sizeof (const char *));
1249 dependencies_allocated = 30;
1250 dependencies_used = 0;
1252 (struct partial_symtab **) alloca (dependencies_allocated *
1253 sizeof (struct partial_symtab *));
1255 /* Init bincl list */
1256 init_bincl_list (20, objfile);
1257 back_to = make_cleanup_free_bincl_list (objfile);
1259 set_last_source_file (NULL);
1261 lowest_text_address = (CORE_ADDR) -1;
1263 symfile_bfd = objfile->obfd; /* For next_text_symbol. */
1264 abfd = objfile->obfd;
1265 symbuf_end = symbuf_idx = 0;
1266 next_symbol_text_func = dbx_next_symbol_text;
1267 textlow_not_set = 1;
1268 has_line_numbers = 0;
1270 /* FIXME: jimb/2003-09-12: We don't apply the right section's offset
1271 to global and static variables. The stab for a global or static
1272 variable doesn't give us any indication of which section it's in,
1273 so we can't tell immediately which offset in
1274 objfile->section_offsets we should apply to the variable's
1277 We could certainly find out which section contains the variable
1278 by looking up the variable's unrelocated address with
1279 find_pc_section, but that would be expensive; this is the
1280 function that constructs the partial symbol tables by examining
1281 every symbol in the entire executable, and it's
1282 performance-critical. So that expense would not be welcome. I'm
1283 not sure what to do about this at the moment.
1285 What we have done for years is to simply assume that the .data
1286 section's offset is appropriate for all global and static
1287 variables. Recently, this was expanded to fall back to the .bss
1288 section's offset if there is no .data section, and then to the
1289 .rodata section's offset. */
1290 data_sect_index = objfile->sect_index_data;
1291 if (data_sect_index == -1)
1292 data_sect_index = SECT_OFF_BSS (objfile);
1293 if (data_sect_index == -1)
1294 data_sect_index = SECT_OFF_RODATA (objfile);
1296 /* If data_sect_index is still -1, that's okay. It's perfectly fine
1297 for the file to have no .data, no .bss, and no .text at all, if
1298 it also has no global or static variables. If it does, we will
1299 get an internal error from an ANOFFSET macro below when we try to
1300 use data_sect_index. */
1302 for (symnum = 0; symnum < DBX_SYMCOUNT (objfile); symnum++)
1304 /* Get the symbol for this run and pull out some info. */
1305 QUIT; /* Allow this to be interruptable. */
1306 if (symbuf_idx == symbuf_end)
1308 bufp = &symbuf[symbuf_idx++];
1311 * Special case to speed up readin.
1313 if (bfd_h_get_8 (abfd, bufp->e_type) == N_SLINE)
1315 has_line_numbers = 1;
1319 INTERNALIZE_SYMBOL (nlist, bufp, abfd);
1320 OBJSTAT (objfile, n_stabs++);
1322 /* Ok. There is a lot of code duplicated in the rest of this
1323 switch statement (for efficiency reasons). Since I don't
1324 like duplicating code, I will do my penance here, and
1325 describe the code which is duplicated:
1327 *) The assignment to namestring.
1328 *) The call to strchr.
1329 *) The addition of a partial symbol the two partial
1330 symbol lists. This last is a large section of code, so
1331 I've imbedded it in the following macro. */
1333 switch (nlist.n_type)
1336 * Standard, external, non-debugger, symbols
1339 case N_TEXT | N_EXT:
1340 case N_NBTEXT | N_EXT:
1341 nlist.n_value += ANOFFSET (objfile->section_offsets,
1342 SECT_OFF_TEXT (objfile));
1345 case N_DATA | N_EXT:
1346 case N_NBDATA | N_EXT:
1347 nlist.n_value += ANOFFSET (objfile->section_offsets,
1348 SECT_OFF_DATA (objfile));
1353 case N_NBBSS | N_EXT:
1354 case N_SETV | N_EXT: /* FIXME, is this in BSS? */
1355 nlist.n_value += ANOFFSET (objfile->section_offsets,
1356 SECT_OFF_BSS (objfile));
1361 namestring = set_namestring (objfile, &nlist);
1364 record_minimal_symbol (namestring, nlist.n_value,
1365 nlist.n_type, objfile); /* Always */
1368 /* Standard, local, non-debugger, symbols. */
1372 /* We need to be able to deal with both N_FN or N_TEXT,
1373 because we have no way of knowing whether the sys-supplied ld
1374 or GNU ld was used to make the executable. Sequents throw
1375 in another wrinkle -- they renumbered N_FN. */
1380 nlist.n_value += ANOFFSET (objfile->section_offsets,
1381 SECT_OFF_TEXT (objfile));
1382 namestring = set_namestring (objfile, &nlist);
1384 if ((namestring[0] == '-' && namestring[1] == 'l')
1385 || (namestring[(nsl = strlen (namestring)) - 1] == 'o'
1386 && namestring[nsl - 2] == '.'))
1388 if (past_first_source_file && pst
1389 /* The gould NP1 uses low values for .o and -l symbols
1390 which are not the address. */
1391 && nlist.n_value >= pst->textlow)
1393 end_psymtab (objfile, pst, psymtab_include_list,
1394 includes_used, symnum * symbol_size,
1395 nlist.n_value > pst->texthigh
1396 ? nlist.n_value : pst->texthigh,
1397 dependency_list, dependencies_used,
1399 pst = (struct partial_symtab *) 0;
1401 dependencies_used = 0;
1402 has_line_numbers = 0;
1405 past_first_source_file = 1;
1406 last_o_file_start = nlist.n_value;
1413 nlist.n_value += ANOFFSET (objfile->section_offsets,
1414 SECT_OFF_DATA (objfile));
1417 case N_UNDF | N_EXT:
1418 /* The case (nlist.n_value != 0) is a "Fortran COMMON" symbol.
1419 We used to rely on the target to tell us whether it knows
1420 where the symbol has been relocated to, but none of the
1421 target implementations actually provided that operation.
1422 So we just ignore the symbol, the same way we would do if
1423 we had a target-side symbol lookup which returned no match.
1425 All other symbols (with nlist.n_value == 0), are really
1426 undefined, and so we ignore them too. */
1430 if (processing_acc_compilation && nlist.n_strx == 1)
1432 /* Deal with relative offsets in the string table
1433 used in ELF+STAB under Solaris. If we want to use the
1434 n_strx field, which contains the name of the file,
1435 we must adjust file_string_table_offset *before* calling
1436 set_namestring(). */
1437 past_first_source_file = 1;
1438 file_string_table_offset = next_file_string_table_offset;
1439 next_file_string_table_offset =
1440 file_string_table_offset + nlist.n_value;
1441 if (next_file_string_table_offset < file_string_table_offset)
1442 error (_("string table offset backs up at %d"), symnum);
1443 /* FIXME -- replace error() with complaint. */
1448 /* Lots of symbol types we can just ignore. */
1455 /* Keep going . . . */
1458 * Special symbol types for GNU
1461 case N_INDR | N_EXT:
1463 case N_SETA | N_EXT:
1465 case N_SETT | N_EXT:
1467 case N_SETD | N_EXT:
1469 case N_SETB | N_EXT:
1480 static int prev_so_symnum = -10;
1481 static int first_so_symnum;
1483 static char *dirname_nso;
1484 int prev_textlow_not_set;
1486 valu = nlist.n_value + ANOFFSET (objfile->section_offsets,
1487 SECT_OFF_TEXT (objfile));
1489 prev_textlow_not_set = textlow_not_set;
1491 /* A zero value is probably an indication for the SunPRO 3.0
1492 compiler. end_psymtab explicitly tests for zero, so
1493 don't relocate it. */
1495 if (nlist.n_value == 0
1496 && gdbarch_sofun_address_maybe_missing (gdbarch))
1498 textlow_not_set = 1;
1502 textlow_not_set = 0;
1504 past_first_source_file = 1;
1506 if (prev_so_symnum != symnum - 1)
1507 { /* Here if prev stab wasn't N_SO. */
1508 first_so_symnum = symnum;
1512 end_psymtab (objfile, pst, psymtab_include_list,
1513 includes_used, symnum * symbol_size,
1514 valu > pst->texthigh ? valu : pst->texthigh,
1515 dependency_list, dependencies_used,
1516 prev_textlow_not_set);
1517 pst = (struct partial_symtab *) 0;
1519 dependencies_used = 0;
1520 has_line_numbers = 0;
1524 prev_so_symnum = symnum;
1526 /* End the current partial symtab and start a new one. */
1528 namestring = set_namestring (objfile, &nlist);
1530 /* Null name means end of .o file. Don't start a new one. */
1531 if (*namestring == '\000')
1534 /* Some compilers (including gcc) emit a pair of initial N_SOs.
1535 The first one is a directory name; the second the file name.
1536 If pst exists, is empty, and has a filename ending in '/',
1537 we assume the previous N_SO was a directory name. */
1539 p = lbasename (namestring);
1540 if (p != namestring && *p == '\000')
1542 /* Save the directory name SOs locally, then save it into
1543 the psymtab when it's created below. */
1544 dirname_nso = namestring;
1548 /* Some other compilers (C++ ones in particular) emit useless
1549 SOs for non-existant .c files. We ignore all subsequent SOs
1550 that immediately follow the first. */
1554 pst = start_psymtab (objfile,
1556 first_so_symnum * symbol_size,
1557 objfile->global_psymbols.next,
1558 objfile->static_psymbols.next);
1559 pst->dirname = dirname_nso;
1567 enum language tmp_language;
1569 /* Add this bincl to the bincl_list for future EXCLs. No
1570 need to save the string; it'll be around until
1571 read_dbx_symtab function returns. */
1573 namestring = set_namestring (objfile, &nlist);
1574 tmp_language = deduce_language_from_filename (namestring);
1576 /* Only change the psymtab's language if we've learned
1577 something useful (eg. tmp_language is not language_unknown).
1578 In addition, to match what start_subfile does, never change
1580 if (tmp_language != language_unknown
1581 && (tmp_language != language_c
1582 || psymtab_language != language_cplus))
1583 psymtab_language = tmp_language;
1587 /* FIXME: we should not get here without a PST to work on.
1588 Attempt to recover. */
1589 complaint (&symfile_complaints,
1590 _("N_BINCL %s not in entries for "
1591 "any file, at symtab pos %d"),
1592 namestring, symnum);
1595 add_bincl_to_list (pst, namestring, nlist.n_value);
1597 /* Mark down an include file in the current psymtab. */
1599 goto record_include_file;
1604 enum language tmp_language;
1606 /* Mark down an include file in the current psymtab. */
1607 namestring = set_namestring (objfile, &nlist);
1608 tmp_language = deduce_language_from_filename (namestring);
1610 /* Only change the psymtab's language if we've learned
1611 something useful (eg. tmp_language is not language_unknown).
1612 In addition, to match what start_subfile does, never change
1614 if (tmp_language != language_unknown
1615 && (tmp_language != language_c
1616 || psymtab_language != language_cplus))
1617 psymtab_language = tmp_language;
1619 /* In C++, one may expect the same filename to come round many
1620 times, when code is coming alternately from the main file
1621 and from inline functions in other files. So I check to see
1622 if this is a file we've seen before -- either the main
1623 source file, or a previously included file.
1625 This seems to be a lot of time to be spending on N_SOL, but
1626 things like "break c-exp.y:435" need to work (I
1627 suppose the psymtab_include_list could be hashed or put
1628 in a binary tree, if profiling shows this is a major hog). */
1629 if (pst && filename_cmp (namestring, pst->filename) == 0)
1634 for (i = 0; i < includes_used; i++)
1635 if (filename_cmp (namestring, psymtab_include_list[i]) == 0)
1644 record_include_file:
1646 psymtab_include_list[includes_used++] = namestring;
1647 if (includes_used >= includes_allocated)
1649 const char **orig = psymtab_include_list;
1651 psymtab_include_list = (const char **)
1652 alloca ((includes_allocated *= 2) * sizeof (const char *));
1653 memcpy (psymtab_include_list, orig,
1654 includes_used * sizeof (const char *));
1658 case N_LSYM: /* Typedef or automatic variable. */
1659 case N_STSYM: /* Data seg var -- static. */
1660 case N_LCSYM: /* BSS " */
1661 case N_ROSYM: /* Read-only data seg var -- static. */
1662 case N_NBSTS: /* Gould nobase. */
1663 case N_NBLCS: /* symbols. */
1665 case N_GSYM: /* Global (extern) variable; can be
1666 data or bss (sigh FIXME). */
1668 /* Following may probably be ignored; I'll leave them here
1669 for now (until I do Pascal and Modula 2 extensions). */
1671 case N_PC: /* I may or may not need this; I
1673 case N_M2C: /* I suspect that I can ignore this here. */
1674 case N_SCOPE: /* Same. */
1678 namestring = set_namestring (objfile, &nlist);
1680 /* See if this is an end of function stab. */
1681 if (pst && nlist.n_type == N_FUN && *namestring == '\000')
1685 /* It's value is the size (in bytes) of the function for
1686 function relative stabs, or the address of the function's
1687 end for old style stabs. */
1688 valu = nlist.n_value + last_function_start;
1689 if (pst->texthigh == 0 || valu > pst->texthigh)
1690 pst->texthigh = valu;
1694 p = (char *) strchr (namestring, ':');
1696 continue; /* Not a debugging symbol. */
1699 sym_name = NULL; /* pacify "gcc -Werror" */
1700 if (psymtab_language == language_cplus)
1702 char *new_name, *name = xmalloc (p - namestring + 1);
1703 memcpy (name, namestring, p - namestring);
1705 name[p - namestring] = '\0';
1706 new_name = cp_canonicalize_string (name);
1707 if (new_name != NULL)
1709 sym_len = strlen (new_name);
1710 sym_name = obstack_copy0 (&objfile->objfile_obstack,
1719 sym_name = namestring;
1720 sym_len = p - namestring;
1723 /* Main processing section for debugging symbols which
1724 the initial read through the symbol tables needs to worry
1725 about. If we reach this point, the symbol which we are
1726 considering is definitely one we are interested in.
1727 p must also contain the (valid) index into the namestring
1728 which indicates the debugging type symbol. */
1733 nlist.n_value += ANOFFSET (objfile->section_offsets,
1736 if (gdbarch_static_transform_name_p (gdbarch))
1737 gdbarch_static_transform_name (gdbarch, namestring);
1739 add_psymbol_to_list (sym_name, sym_len, 1,
1740 VAR_DOMAIN, LOC_STATIC,
1741 &objfile->static_psymbols,
1743 psymtab_language, objfile);
1747 nlist.n_value += ANOFFSET (objfile->section_offsets,
1749 /* The addresses in these entries are reported to be
1750 wrong. See the code that reads 'G's for symtabs. */
1751 add_psymbol_to_list (sym_name, sym_len, 1,
1752 VAR_DOMAIN, LOC_STATIC,
1753 &objfile->global_psymbols,
1755 psymtab_language, objfile);
1759 /* When a 'T' entry is defining an anonymous enum, it
1760 may have a name which is the empty string, or a
1761 single space. Since they're not really defining a
1762 symbol, those shouldn't go in the partial symbol
1763 table. We do pick up the elements of such enums at
1764 'check_enum:', below. */
1765 if (p >= namestring + 2
1766 || (p == namestring + 1
1767 && namestring[0] != ' '))
1769 add_psymbol_to_list (sym_name, sym_len, 1,
1770 STRUCT_DOMAIN, LOC_TYPEDEF,
1771 &objfile->static_psymbols,
1773 psymtab_language, objfile);
1776 /* Also a typedef with the same name. */
1777 add_psymbol_to_list (sym_name, sym_len, 1,
1778 VAR_DOMAIN, LOC_TYPEDEF,
1779 &objfile->static_psymbols,
1781 psymtab_language, objfile);
1788 if (p != namestring) /* a name is there, not just :T... */
1790 add_psymbol_to_list (sym_name, sym_len, 1,
1791 VAR_DOMAIN, LOC_TYPEDEF,
1792 &objfile->static_psymbols,
1794 psymtab_language, objfile);
1797 /* If this is an enumerated type, we need to
1798 add all the enum constants to the partial symbol
1799 table. This does not cover enums without names, e.g.
1800 "enum {a, b} c;" in C, but fortunately those are
1801 rare. There is no way for GDB to find those from the
1802 enum type without spending too much time on it. Thus
1803 to solve this problem, the compiler needs to put out the
1804 enum in a nameless type. GCC2 does this. */
1806 /* We are looking for something of the form
1807 <name> ":" ("t" | "T") [<number> "="] "e"
1808 {<constant> ":" <value> ","} ";". */
1810 /* Skip over the colon and the 't' or 'T'. */
1812 /* This type may be given a number. Also, numbers can come
1813 in pairs like (0,26). Skip over it. */
1814 while ((*p >= '0' && *p <= '9')
1815 || *p == '(' || *p == ',' || *p == ')'
1821 /* The aix4 compiler emits extra crud before the members. */
1824 /* Skip over the type (?). */
1828 /* Skip over the colon. */
1832 /* We have found an enumerated type. */
1833 /* According to comments in read_enum_type
1834 a comma could end it instead of a semicolon.
1835 I don't know where that happens.
1837 while (*p && *p != ';' && *p != ',')
1841 /* Check for and handle cretinous dbx symbol name
1843 if (*p == '\\' || (*p == '?' && p[1] == '\0'))
1844 p = next_symbol_text (objfile);
1846 /* Point to the character after the name
1847 of the enum constant. */
1848 for (q = p; *q && *q != ':'; q++)
1850 /* Note that the value doesn't matter for
1851 enum constants in psymtabs, just in symtabs. */
1852 add_psymbol_to_list (p, q - p, 1,
1853 VAR_DOMAIN, LOC_CONST,
1854 &objfile->static_psymbols, 0,
1855 0, psymtab_language, objfile);
1856 /* Point past the name. */
1858 /* Skip over the value. */
1859 while (*p && *p != ',')
1861 /* Advance past the comma. */
1869 /* Constant, e.g. from "const" in Pascal. */
1870 add_psymbol_to_list (sym_name, sym_len, 1,
1871 VAR_DOMAIN, LOC_CONST,
1872 &objfile->static_psymbols, nlist.n_value,
1873 0, psymtab_language, objfile);
1879 int name_len = p - namestring;
1880 char *name = xmalloc (name_len + 1);
1882 memcpy (name, namestring, name_len);
1883 name[name_len] = '\0';
1884 function_outside_compilation_unit_complaint (name);
1887 nlist.n_value += ANOFFSET (objfile->section_offsets,
1888 SECT_OFF_TEXT (objfile));
1889 /* Kludges for ELF/STABS with Sun ACC. */
1890 last_function_name = namestring;
1891 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1892 value for the bottom of the text seg in those cases. */
1893 if (nlist.n_value == ANOFFSET (objfile->section_offsets,
1894 SECT_OFF_TEXT (objfile))
1895 && gdbarch_sofun_address_maybe_missing (gdbarch))
1897 CORE_ADDR minsym_valu =
1898 find_stab_function_addr (namestring,
1899 pst ? pst->filename : NULL,
1902 /* find_stab_function_addr will return 0 if the minimal
1903 symbol wasn't found. (Unfortunately, this might also
1904 be a valid address.) Anyway, if it *does* return 0,
1905 it is likely that the value was set correctly to begin
1907 if (minsym_valu != 0)
1908 nlist.n_value = minsym_valu;
1910 if (pst && textlow_not_set
1911 && gdbarch_sofun_address_maybe_missing (gdbarch))
1913 pst->textlow = nlist.n_value;
1914 textlow_not_set = 0;
1918 /* Keep track of the start of the last function so we
1919 can handle end of function symbols. */
1920 last_function_start = nlist.n_value;
1922 /* In reordered executables this function may lie outside
1923 the bounds created by N_SO symbols. If that's the case
1924 use the address of this function as the low bound for
1925 the partial symbol table. */
1928 || (nlist.n_value < pst->textlow
1930 != ANOFFSET (objfile->section_offsets,
1931 SECT_OFF_TEXT (objfile))))))
1933 pst->textlow = nlist.n_value;
1934 textlow_not_set = 0;
1936 add_psymbol_to_list (sym_name, sym_len, 1,
1937 VAR_DOMAIN, LOC_BLOCK,
1938 &objfile->static_psymbols,
1940 psymtab_language, objfile);
1943 /* Global functions were ignored here, but now they
1944 are put into the global psymtab like one would expect.
1945 They're also in the minimal symbol table. */
1949 int name_len = p - namestring;
1950 char *name = xmalloc (name_len + 1);
1952 memcpy (name, namestring, name_len);
1953 name[name_len] = '\0';
1954 function_outside_compilation_unit_complaint (name);
1957 nlist.n_value += ANOFFSET (objfile->section_offsets,
1958 SECT_OFF_TEXT (objfile));
1959 /* Kludges for ELF/STABS with Sun ACC. */
1960 last_function_name = namestring;
1961 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1962 value for the bottom of the text seg in those cases. */
1963 if (nlist.n_value == ANOFFSET (objfile->section_offsets,
1964 SECT_OFF_TEXT (objfile))
1965 && gdbarch_sofun_address_maybe_missing (gdbarch))
1967 CORE_ADDR minsym_valu =
1968 find_stab_function_addr (namestring,
1969 pst ? pst->filename : NULL,
1972 /* find_stab_function_addr will return 0 if the minimal
1973 symbol wasn't found. (Unfortunately, this might also
1974 be a valid address.) Anyway, if it *does* return 0,
1975 it is likely that the value was set correctly to begin
1977 if (minsym_valu != 0)
1978 nlist.n_value = minsym_valu;
1980 if (pst && textlow_not_set
1981 && gdbarch_sofun_address_maybe_missing (gdbarch))
1983 pst->textlow = nlist.n_value;
1984 textlow_not_set = 0;
1988 /* Keep track of the start of the last function so we
1989 can handle end of function symbols. */
1990 last_function_start = nlist.n_value;
1992 /* In reordered executables this function may lie outside
1993 the bounds created by N_SO symbols. If that's the case
1994 use the address of this function as the low bound for
1995 the partial symbol table. */
1998 || (nlist.n_value < pst->textlow
2000 != ANOFFSET (objfile->section_offsets,
2001 SECT_OFF_TEXT (objfile))))))
2003 pst->textlow = nlist.n_value;
2004 textlow_not_set = 0;
2006 add_psymbol_to_list (sym_name, sym_len, 1,
2007 VAR_DOMAIN, LOC_BLOCK,
2008 &objfile->global_psymbols,
2010 psymtab_language, objfile);
2013 /* Two things show up here (hopefully); static symbols of
2014 local scope (static used inside braces) or extensions
2015 of structure symbols. We can ignore both. */
2029 case '#': /* For symbol identification (used in live ranges). */
2033 /* It is a C++ nested symbol. We don't need to record it
2034 (I don't think); if we try to look up foo::bar::baz,
2035 then symbols for the symtab containing foo should get
2036 read in, I think. */
2037 /* Someone says sun cc puts out symbols like
2038 /foo/baz/maclib::/usr/local/bin/maclib,
2039 which would get here with a symbol type of ':'. */
2043 /* Unexpected symbol descriptor. The second and subsequent stabs
2044 of a continued stab can show up here. The question is
2045 whether they ever can mimic a normal stab--it would be
2046 nice if not, since we certainly don't want to spend the
2047 time searching to the end of every string looking for
2050 complaint (&symfile_complaints,
2051 _("unknown symbol descriptor `%c'"),
2054 /* Ignore it; perhaps it is an extension that we don't
2062 namestring = set_namestring (objfile, &nlist);
2064 /* Find the corresponding bincl and mark that psymtab on the
2065 psymtab dependency list. */
2067 struct partial_symtab *needed_pst =
2068 find_corresponding_bincl_psymtab (namestring, nlist.n_value);
2070 /* If this include file was defined earlier in this file,
2072 if (needed_pst == pst)
2080 for (i = 0; i < dependencies_used; i++)
2081 if (dependency_list[i] == needed_pst)
2087 /* If it's already in the list, skip the rest. */
2091 dependency_list[dependencies_used++] = needed_pst;
2092 if (dependencies_used >= dependencies_allocated)
2094 struct partial_symtab **orig = dependency_list;
2097 (struct partial_symtab **)
2098 alloca ((dependencies_allocated *= 2)
2099 * sizeof (struct partial_symtab *));
2100 memcpy (dependency_list, orig,
2102 * sizeof (struct partial_symtab *)));
2104 fprintf_unfiltered (gdb_stderr,
2105 "Had to reallocate "
2106 "dependency list.\n");
2107 fprintf_unfiltered (gdb_stderr,
2108 "New dependencies allocated: %d\n",
2109 dependencies_allocated);
2117 /* Solaris 2 end of module, finish current partial symbol table.
2118 end_psymtab will set pst->texthigh to the proper value, which
2119 is necessary if a module compiled without debugging info
2120 follows this module. */
2121 if (pst && gdbarch_sofun_address_maybe_missing (gdbarch))
2123 end_psymtab (objfile, pst, psymtab_include_list, includes_used,
2124 symnum * symbol_size,
2125 (CORE_ADDR) 0, dependency_list,
2126 dependencies_used, textlow_not_set);
2127 pst = (struct partial_symtab *) 0;
2129 dependencies_used = 0;
2130 has_line_numbers = 0;
2136 HANDLE_RBRAC (nlist.n_value);
2142 case N_SSYM: /* Claim: Structure or union element.
2143 Hopefully, I can ignore this. */
2144 case N_ENTRY: /* Alternate entry point; can ignore. */
2145 case N_MAIN: /* Can definitely ignore this. */
2146 case N_CATCH: /* These are GNU C++ extensions */
2147 case N_EHDECL: /* that can safely be ignored here. */
2157 case N_NSYMS: /* Ultrix 4.0: symbol count */
2158 case N_DEFD: /* GNU Modula-2 */
2159 case N_ALIAS: /* SunPro F77: alias name, ignore for now. */
2161 case N_OBJ: /* Useless types from Solaris. */
2164 /* These symbols aren't interesting; don't worry about them. */
2168 /* If we haven't found it yet, ignore it. It's probably some
2169 new type we don't know about yet. */
2170 unknown_symtype_complaint (hex_string (nlist.n_type));
2175 /* If there's stuff to be cleaned up, clean it up. */
2178 /* Don't set pst->texthigh lower than it already is. */
2179 CORE_ADDR text_end =
2180 (lowest_text_address == (CORE_ADDR) -1
2181 ? (text_addr + ANOFFSET (objfile->section_offsets,
2182 SECT_OFF_TEXT (objfile)))
2183 : lowest_text_address)
2186 end_psymtab (objfile, pst, psymtab_include_list, includes_used,
2187 symnum * symbol_size,
2188 text_end > pst->texthigh ? text_end : pst->texthigh,
2189 dependency_list, dependencies_used, textlow_not_set);
2192 do_cleanups (back_to);
2195 /* Allocate and partially fill a partial symtab. It will be
2196 completely filled at the end of the symbol list.
2198 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2199 is the address relative to which its symbols are (incremental) or 0
2202 static struct partial_symtab *
2203 start_psymtab (struct objfile *objfile, char *filename, CORE_ADDR textlow,
2204 int ldsymoff, struct partial_symbol **global_syms,
2205 struct partial_symbol **static_syms)
2207 struct partial_symtab *result =
2208 start_psymtab_common (objfile, objfile->section_offsets,
2209 filename, textlow, global_syms, static_syms);
2211 result->read_symtab_private = obstack_alloc (&objfile->objfile_obstack,
2212 sizeof (struct symloc));
2213 LDSYMOFF (result) = ldsymoff;
2214 result->read_symtab = dbx_read_symtab;
2215 SYMBOL_SIZE (result) = symbol_size;
2216 SYMBOL_OFFSET (result) = symbol_table_offset;
2217 STRING_OFFSET (result) = string_table_offset;
2218 FILE_STRING_OFFSET (result) = file_string_table_offset;
2221 /* If we're handling an ELF file, drag some section-relocation info
2222 for this source file out of the ELF symbol table, to compensate for
2223 Sun brain death. This replaces the section_offsets in this psymtab,
2225 elfstab_offset_sections (objfile, result);
2228 /* Deduce the source language from the filename for this psymtab. */
2229 psymtab_language = deduce_language_from_filename (filename);
2234 /* Close off the current usage of PST.
2235 Returns PST or NULL if the partial symtab was empty and thrown away.
2237 FIXME: List variables and peculiarities of same. */
2239 struct partial_symtab *
2240 end_psymtab (struct objfile *objfile, struct partial_symtab *pst,
2241 const char **include_list, int num_includes,
2242 int capping_symbol_offset, CORE_ADDR capping_text,
2243 struct partial_symtab **dependency_list, int number_dependencies,
2244 int textlow_not_set)
2247 struct gdbarch *gdbarch = get_objfile_arch (objfile);
2249 if (capping_symbol_offset != -1)
2250 LDSYMLEN (pst) = capping_symbol_offset - LDSYMOFF (pst);
2251 pst->texthigh = capping_text;
2253 /* Under Solaris, the N_SO symbols always have a value of 0,
2254 instead of the usual address of the .o file. Therefore,
2255 we have to do some tricks to fill in texthigh and textlow.
2256 The first trick is: if we see a static
2257 or global function, and the textlow for the current pst
2258 is not set (ie: textlow_not_set), then we use that function's
2259 address for the textlow of the pst. */
2261 /* Now, to fill in texthigh, we remember the last function seen
2262 in the .o file. Also, there's a hack in
2263 bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
2264 to here via the misc_info field. Therefore, we can fill in
2265 a reliable texthigh by taking the address plus size of the
2266 last function in the file. */
2268 if (pst->texthigh == 0 && last_function_name
2269 && gdbarch_sofun_address_maybe_missing (gdbarch))
2273 struct minimal_symbol *minsym;
2275 p = strchr (last_function_name, ':');
2277 p = last_function_name;
2278 n = p - last_function_name;
2280 strncpy (p, last_function_name, n);
2283 minsym = lookup_minimal_symbol (p, pst->filename, objfile);
2286 /* Sun Fortran appends an underscore to the minimal symbol name,
2287 try again with an appended underscore if the minimal symbol
2291 minsym = lookup_minimal_symbol (p, pst->filename, objfile);
2295 pst->texthigh = SYMBOL_VALUE_ADDRESS (minsym) + MSYMBOL_SIZE (minsym);
2297 last_function_name = NULL;
2300 if (!gdbarch_sofun_address_maybe_missing (gdbarch))
2302 /* This test will be true if the last .o file is only data. */
2303 else if (textlow_not_set)
2304 pst->textlow = pst->texthigh;
2307 struct partial_symtab *p1;
2309 /* If we know our own starting text address, then walk through all other
2310 psymtabs for this objfile, and if any didn't know their ending text
2311 address, set it to our starting address. Take care to not set our
2312 own ending address to our starting address, nor to set addresses on
2313 `dependency' files that have both textlow and texthigh zero. */
2315 ALL_OBJFILE_PSYMTABS (objfile, p1)
2317 if (p1->texthigh == 0 && p1->textlow != 0 && p1 != pst)
2319 p1->texthigh = pst->textlow;
2320 /* If this file has only data, then make textlow match
2322 if (p1->textlow == 0)
2323 p1->textlow = p1->texthigh;
2328 /* End of kludge for patching Solaris textlow and texthigh. */
2330 pst->n_global_syms =
2331 objfile->global_psymbols.next - (objfile->global_psymbols.list
2332 + pst->globals_offset);
2333 pst->n_static_syms =
2334 objfile->static_psymbols.next - (objfile->static_psymbols.list
2335 + pst->statics_offset);
2337 pst->number_of_dependencies = number_dependencies;
2338 if (number_dependencies)
2340 pst->dependencies = (struct partial_symtab **)
2341 obstack_alloc (&objfile->objfile_obstack,
2342 number_dependencies * sizeof (struct partial_symtab *));
2343 memcpy (pst->dependencies, dependency_list,
2344 number_dependencies * sizeof (struct partial_symtab *));
2347 pst->dependencies = 0;
2349 for (i = 0; i < num_includes; i++)
2351 struct partial_symtab *subpst =
2352 allocate_psymtab (include_list[i], objfile);
2354 /* Copy the sesction_offsets array from the main psymtab. */
2355 subpst->section_offsets = pst->section_offsets;
2356 subpst->read_symtab_private =
2357 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symloc));
2361 subpst->texthigh = 0;
2363 /* We could save slight bits of space by only making one of these,
2364 shared by the entire set of include files. FIXME-someday. */
2365 subpst->dependencies = (struct partial_symtab **)
2366 obstack_alloc (&objfile->objfile_obstack,
2367 sizeof (struct partial_symtab *));
2368 subpst->dependencies[0] = pst;
2369 subpst->number_of_dependencies = 1;
2371 subpst->globals_offset =
2372 subpst->n_global_syms =
2373 subpst->statics_offset =
2374 subpst->n_static_syms = 0;
2378 subpst->read_symtab = pst->read_symtab;
2381 sort_pst_symbols (objfile, pst);
2383 if (num_includes == 0
2384 && number_dependencies == 0
2385 && pst->n_global_syms == 0
2386 && pst->n_static_syms == 0
2387 && has_line_numbers == 0)
2389 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2390 it is on the obstack, but we can forget to chain it on the list. */
2391 /* Empty psymtabs happen as a result of header files which don't have
2392 any symbols in them. There can be a lot of them. But this check
2393 is wrong, in that a psymtab with N_SLINE entries but nothing else
2394 is not empty, but we don't realize that. Fixing that without slowing
2395 things down might be tricky. */
2397 discard_psymtab (objfile, pst);
2399 /* Indicate that psymtab was thrown away. */
2400 pst = (struct partial_symtab *) NULL;
2406 dbx_psymtab_to_symtab_1 (struct objfile *objfile, struct partial_symtab *pst)
2408 struct cleanup *old_chain;
2413 fprintf_unfiltered (gdb_stderr, "Psymtab for %s already read in. "
2414 "Shouldn't happen.\n",
2419 /* Read in all partial symtabs on which this one is dependent. */
2420 for (i = 0; i < pst->number_of_dependencies; i++)
2421 if (!pst->dependencies[i]->readin)
2423 /* Inform about additional files that need to be read in. */
2426 fputs_filtered (" ", gdb_stdout);
2428 fputs_filtered ("and ", gdb_stdout);
2430 printf_filtered ("%s...", pst->dependencies[i]->filename);
2431 wrap_here (""); /* Flush output. */
2432 gdb_flush (gdb_stdout);
2434 dbx_psymtab_to_symtab_1 (objfile, pst->dependencies[i]);
2437 if (LDSYMLEN (pst)) /* Otherwise it's a dummy. */
2439 /* Init stuff necessary for reading in symbols */
2442 old_chain = make_cleanup (really_free_pendings, 0);
2443 file_string_table_offset = FILE_STRING_OFFSET (pst);
2444 symbol_size = SYMBOL_SIZE (pst);
2446 /* Read in this file's symbols. */
2447 bfd_seek (objfile->obfd, SYMBOL_OFFSET (pst), SEEK_SET);
2448 read_ofile_symtab (objfile, pst);
2450 do_cleanups (old_chain);
2456 /* Read in all of the symbols for a given psymtab for real.
2457 Be verbose about it if the user wants that. SELF is not NULL. */
2460 dbx_read_symtab (struct partial_symtab *self, struct objfile *objfile)
2463 struct cleanup *back_to = NULL;
2467 fprintf_unfiltered (gdb_stderr, "Psymtab for %s already read in. "
2468 "Shouldn't happen.\n",
2473 if (LDSYMLEN (self) || self->number_of_dependencies)
2475 /* Print the message now, before reading the string table,
2476 to avoid disconcerting pauses. */
2479 printf_filtered ("Reading in symbols for %s...", self->filename);
2480 gdb_flush (gdb_stdout);
2483 sym_bfd = objfile->obfd;
2485 next_symbol_text_func = dbx_next_symbol_text;
2487 if (DBX_STAB_SECTION (objfile))
2490 = symfile_relocate_debug_section (objfile,
2491 DBX_STAB_SECTION (objfile),
2495 back_to = make_cleanup (free_current_contents,
2496 (void *) &stabs_data);
2499 dbx_psymtab_to_symtab_1 (objfile, self);
2502 do_cleanups (back_to);
2504 /* Match with global symbols. This only needs to be done once,
2505 after all of the symtabs and dependencies have been read in. */
2506 scan_file_globals (objfile);
2508 /* Finish up the debug error message. */
2510 printf_filtered ("done.\n");
2514 /* Read in a defined section of a specific object file's symbols. */
2517 read_ofile_symtab (struct objfile *objfile, struct partial_symtab *pst)
2520 struct external_nlist *bufp;
2521 struct internal_nlist nlist;
2523 unsigned max_symnum;
2525 int sym_offset; /* Offset to start of symbols to read */
2526 int sym_size; /* Size of symbols to read */
2527 CORE_ADDR text_offset; /* Start of text segment for symbols */
2528 int text_size; /* Size of text segment for symbols */
2529 struct section_offsets *section_offsets;
2531 sym_offset = LDSYMOFF (pst);
2532 sym_size = LDSYMLEN (pst);
2533 text_offset = pst->textlow;
2534 text_size = pst->texthigh - pst->textlow;
2535 /* This cannot be simply objfile->section_offsets because of
2536 elfstab_offset_sections() which initializes the psymtab section
2537 offsets information in a special way, and that is different from
2538 objfile->section_offsets. */
2539 section_offsets = pst->section_offsets;
2541 dbxread_objfile = objfile;
2542 subfile_stack = NULL;
2544 stringtab_global = DBX_STRINGTAB (objfile);
2545 set_last_source_file (NULL);
2547 abfd = objfile->obfd;
2548 symfile_bfd = objfile->obfd; /* Implicit param to next_text_symbol. */
2549 symbuf_end = symbuf_idx = 0;
2551 symbuf_left = sym_offset + sym_size;
2553 /* It is necessary to actually read one symbol *before* the start
2554 of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
2555 occurs before the N_SO symbol.
2557 Detecting this in read_dbx_symtab
2558 would slow down initial readin, so we look for it here instead. */
2559 if (!processing_acc_compilation && sym_offset >= (int) symbol_size)
2561 stabs_seek (sym_offset - symbol_size);
2563 bufp = &symbuf[symbuf_idx++];
2564 INTERNALIZE_SYMBOL (nlist, bufp, abfd);
2565 OBJSTAT (objfile, n_stabs++);
2567 namestring = set_namestring (objfile, &nlist);
2569 processing_gcc_compilation = 0;
2570 if (nlist.n_type == N_TEXT)
2572 const char *tempstring = namestring;
2574 if (strcmp (namestring, GCC_COMPILED_FLAG_SYMBOL) == 0)
2575 processing_gcc_compilation = 1;
2576 else if (strcmp (namestring, GCC2_COMPILED_FLAG_SYMBOL) == 0)
2577 processing_gcc_compilation = 2;
2578 if (tempstring[0] == bfd_get_symbol_leading_char (symfile_bfd))
2580 if (strncmp (tempstring, "__gnu_compiled", 14) == 0)
2581 processing_gcc_compilation = 2;
2586 /* The N_SO starting this symtab is the first symbol, so we
2587 better not check the symbol before it. I'm not this can
2588 happen, but it doesn't hurt to check for it. */
2589 stabs_seek (sym_offset);
2590 processing_gcc_compilation = 0;
2593 if (symbuf_idx == symbuf_end)
2595 bufp = &symbuf[symbuf_idx];
2596 if (bfd_h_get_8 (abfd, bufp->e_type) != N_SO)
2597 error (_("First symbol in segment of executable not a source symbol"));
2599 max_symnum = sym_size / symbol_size;
2602 symnum < max_symnum;
2605 QUIT; /* Allow this to be interruptable. */
2606 if (symbuf_idx == symbuf_end)
2608 bufp = &symbuf[symbuf_idx++];
2609 INTERNALIZE_SYMBOL (nlist, bufp, abfd);
2610 OBJSTAT (objfile, n_stabs++);
2612 type = bfd_h_get_8 (abfd, bufp->e_type);
2614 namestring = set_namestring (objfile, &nlist);
2618 if (sizeof (nlist.n_value) > 4
2619 /* We are a 64-bit debugger debugging a 32-bit program. */
2620 && (type == N_LSYM || type == N_PSYM))
2621 /* We have to be careful with the n_value in the case of N_LSYM
2622 and N_PSYM entries, because they are signed offsets from frame
2623 pointer, but we actually read them as unsigned 32-bit values.
2624 This is not a problem for 32-bit debuggers, for which negative
2625 values end up being interpreted correctly (as negative
2626 offsets) due to integer overflow.
2627 But we need to sign-extend the value for 64-bit debuggers,
2628 or we'll end up interpreting negative values as very large
2629 positive offsets. */
2630 nlist.n_value = (nlist.n_value ^ 0x80000000) - 0x80000000;
2631 process_one_symbol (type, nlist.n_desc, nlist.n_value,
2632 namestring, section_offsets, objfile);
2634 /* We skip checking for a new .o or -l file; that should never
2635 happen in this routine. */
2636 else if (type == N_TEXT)
2638 /* I don't think this code will ever be executed, because
2639 the GCC_COMPILED_FLAG_SYMBOL usually is right before
2640 the N_SO symbol which starts this source file.
2641 However, there is no reason not to accept
2642 the GCC_COMPILED_FLAG_SYMBOL anywhere. */
2644 if (strcmp (namestring, GCC_COMPILED_FLAG_SYMBOL) == 0)
2645 processing_gcc_compilation = 1;
2646 else if (strcmp (namestring, GCC2_COMPILED_FLAG_SYMBOL) == 0)
2647 processing_gcc_compilation = 2;
2649 else if (type & N_EXT || type == (unsigned char) N_TEXT
2650 || type == (unsigned char) N_NBTEXT)
2652 /* Global symbol: see if we came across a dbx defintion for
2653 a corresponding symbol. If so, store the value. Remove
2654 syms from the chain when their values are stored, but
2655 search the whole chain, as there may be several syms from
2656 different files with the same name. */
2657 /* This is probably not true. Since the files will be read
2658 in one at a time, each reference to a global symbol will
2659 be satisfied in each file as it appears. So we skip this
2665 /* In a Solaris elf file, this variable, which comes from the
2666 value of the N_SO symbol, will still be 0. Luckily, text_offset,
2667 which comes from pst->textlow is correct. */
2668 if (last_source_start_addr == 0)
2669 last_source_start_addr = text_offset;
2671 /* In reordered executables last_source_start_addr may not be the
2672 lower bound for this symtab, instead use text_offset which comes
2673 from pst->textlow which is correct. */
2674 if (last_source_start_addr > text_offset)
2675 last_source_start_addr = text_offset;
2677 pst->symtab = end_symtab (text_offset + text_size, objfile,
2678 SECT_OFF_TEXT (objfile));
2682 dbxread_objfile = NULL;
2686 /* Record the namespace that the function defined by SYMBOL was
2687 defined in, if necessary. BLOCK is the associated block; use
2688 OBSTACK for allocation. */
2691 cp_set_block_scope (const struct symbol *symbol,
2692 struct block *block,
2693 struct obstack *obstack)
2695 if (SYMBOL_DEMANGLED_NAME (symbol) != NULL)
2697 /* Try to figure out the appropriate namespace from the
2700 /* FIXME: carlton/2003-04-15: If the function in question is
2701 a method of a class, the name will actually include the
2702 name of the class as well. This should be harmless, but
2703 is a little unfortunate. */
2705 const char *name = SYMBOL_DEMANGLED_NAME (symbol);
2706 unsigned int prefix_len = cp_entire_prefix_len (name);
2708 block_set_scope (block,
2709 obstack_copy0 (obstack, name, prefix_len),
2714 /* This handles a single symbol from the symbol-file, building symbols
2715 into a GDB symtab. It takes these arguments and an implicit argument.
2717 TYPE is the type field of the ".stab" symbol entry.
2718 DESC is the desc field of the ".stab" entry.
2719 VALU is the value field of the ".stab" entry.
2720 NAME is the symbol name, in our address space.
2721 SECTION_OFFSETS is a set of amounts by which the sections of this
2722 object file were relocated when it was loaded into memory. Note
2723 that these section_offsets are not the objfile->section_offsets but
2724 the pst->section_offsets. All symbols that refer to memory
2725 locations need to be offset by these amounts.
2726 OBJFILE is the object file from which we are reading symbols. It
2727 is used in end_symtab. */
2730 process_one_symbol (int type, int desc, CORE_ADDR valu, char *name,
2731 struct section_offsets *section_offsets,
2732 struct objfile *objfile)
2734 struct gdbarch *gdbarch = get_objfile_arch (objfile);
2735 struct context_stack *new;
2736 /* This remembers the address of the start of a function. It is
2737 used because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries
2738 are relative to the current function's start address. On systems
2739 other than Solaris 2, this just holds the SECT_OFF_TEXT value,
2740 and is used to relocate these symbol types rather than
2742 static CORE_ADDR function_start_offset;
2744 /* This holds the address of the start of a function, without the
2745 system peculiarities of function_start_offset. */
2746 static CORE_ADDR last_function_start;
2748 /* If this is nonzero, we've seen an N_SLINE since the start of the
2749 current function. We use this to tell us to move the first sline
2750 to the beginning of the function regardless of what its given
2752 static int sline_found_in_function = 1;
2754 /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this
2755 source file. Used to detect the SunPRO solaris compiler. */
2756 static int n_opt_found;
2758 /* The stab type used for the definition of the last function.
2759 N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */
2760 static int function_stab_type = 0;
2762 if (!block_address_function_relative)
2764 /* N_LBRAC, N_RBRAC and N_SLINE entries are not relative to the
2765 function start address, so just use the text offset. */
2766 function_start_offset =
2767 ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2770 /* Something is wrong if we see real data before seeing a source
2773 if (get_last_source_file () == NULL && type != (unsigned char) N_SO)
2775 /* Ignore any symbols which appear before an N_SO symbol.
2776 Currently no one puts symbols there, but we should deal
2777 gracefully with the case. A complain()t might be in order,
2778 but this should not be an error (). */
2787 if (*name == '\000')
2789 /* This N_FUN marks the end of a function. This closes off
2790 the current block. */
2791 struct block *block;
2793 if (context_stack_depth <= 0)
2795 lbrac_mismatch_complaint (symnum);
2799 /* The following check is added before recording line 0 at
2800 end of function so as to handle hand-generated stabs
2801 which may have an N_FUN stabs at the end of the function,
2802 but no N_SLINE stabs. */
2803 if (sline_found_in_function)
2805 CORE_ADDR addr = last_function_start + valu;
2807 record_line (current_subfile, 0,
2808 gdbarch_addr_bits_remove (gdbarch, addr));
2811 within_function = 0;
2812 new = pop_context ();
2814 /* Make a block for the local symbols within. */
2815 block = finish_block (new->name, &local_symbols, new->old_blocks,
2816 new->start_addr, new->start_addr + valu,
2819 /* For C++, set the block's scope. */
2820 if (SYMBOL_LANGUAGE (new->name) == language_cplus)
2821 cp_set_block_scope (new->name, block, &objfile->objfile_obstack);
2823 /* May be switching to an assembler file which may not be using
2824 block relative stabs, so reset the offset. */
2825 if (block_address_function_relative)
2826 function_start_offset = 0;
2831 sline_found_in_function = 0;
2833 /* Relocate for dynamic loading. */
2834 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2835 valu = gdbarch_addr_bits_remove (gdbarch, valu);
2836 last_function_start = valu;
2838 goto define_a_symbol;
2841 /* This "symbol" just indicates the start of an inner lexical
2842 context within a function. */
2844 /* Ignore extra outermost context from SunPRO cc and acc. */
2845 if (n_opt_found && desc == 1)
2848 if (block_address_function_relative)
2849 /* Relocate for Sun ELF acc fn-relative syms. */
2850 valu += function_start_offset;
2852 /* On most machines, the block addresses are relative to the
2853 N_SO, the linker did not relocate them (sigh). */
2854 valu += last_source_start_addr;
2856 push_context (desc, valu);
2860 /* This "symbol" just indicates the end of an inner lexical
2861 context that was started with N_LBRAC. */
2863 /* Ignore extra outermost context from SunPRO cc and acc. */
2864 if (n_opt_found && desc == 1)
2867 if (block_address_function_relative)
2868 /* Relocate for Sun ELF acc fn-relative syms. */
2869 valu += function_start_offset;
2871 /* On most machines, the block addresses are relative to the
2872 N_SO, the linker did not relocate them (sigh). */
2873 valu += last_source_start_addr;
2875 if (context_stack_depth <= 0)
2877 lbrac_mismatch_complaint (symnum);
2881 new = pop_context ();
2882 if (desc != new->depth)
2883 lbrac_mismatch_complaint (symnum);
2885 if (local_symbols != NULL)
2887 /* GCC development snapshots from March to December of
2888 2000 would output N_LSYM entries after N_LBRAC
2889 entries. As a consequence, these symbols are simply
2890 discarded. Complain if this is the case. */
2891 complaint (&symfile_complaints,
2892 _("misplaced N_LBRAC entry; discarding local "
2893 "symbols which have no enclosing block"));
2895 local_symbols = new->locals;
2897 if (context_stack_depth > 1)
2899 /* This is not the outermost LBRAC...RBRAC pair in the
2900 function, its local symbols preceded it, and are the ones
2901 just recovered from the context stack. Define the block
2902 for them (but don't bother if the block contains no
2903 symbols. Should we complain on blocks without symbols?
2904 I can't think of any useful purpose for them). */
2905 if (local_symbols != NULL)
2907 /* Muzzle a compiler bug that makes end < start.
2909 ??? Which compilers? Is this ever harmful?. */
2910 if (new->start_addr > valu)
2912 complaint (&symfile_complaints,
2913 _("block start larger than block end"));
2914 new->start_addr = valu;
2916 /* Make a block for the local symbols within. */
2917 finish_block (0, &local_symbols, new->old_blocks,
2918 new->start_addr, valu, objfile);
2923 /* This is the outermost LBRAC...RBRAC pair. There is no
2924 need to do anything; leave the symbols that preceded it
2925 to be attached to the function's own block. We need to
2926 indicate that we just moved outside of the function. */
2927 within_function = 0;
2934 /* This kind of symbol indicates the start of an object file.
2935 Relocate for dynamic loading. */
2936 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2940 /* This type of symbol indicates the start of data for one
2941 source file. Finish the symbol table of the previous source
2942 file (if any) and start accumulating a new symbol table.
2943 Relocate for dynamic loading. */
2944 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2948 if (get_last_source_file ())
2950 /* Check if previous symbol was also an N_SO (with some
2951 sanity checks). If so, that one was actually the
2952 directory name, and the current one is the real file
2953 name. Patch things up. */
2954 if (previous_stab_code == (unsigned char) N_SO)
2956 patch_subfile_names (current_subfile, name);
2957 break; /* Ignore repeated SOs. */
2959 end_symtab (valu, objfile, SECT_OFF_TEXT (objfile));
2963 /* Null name means this just marks the end of text for this .o
2964 file. Don't start a new symtab in this case. */
2965 if (*name == '\000')
2968 if (block_address_function_relative)
2969 function_start_offset = 0;
2972 start_symtab (name, NULL, valu);
2973 record_debugformat ("stabs");
2977 /* This type of symbol indicates the start of data for a
2978 sub-source-file, one whose contents were copied or included
2979 in the compilation of the main source file (whose name was
2980 given in the N_SO symbol). Relocate for dynamic loading. */
2981 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2982 start_subfile (name, current_subfile->dirname);
2987 add_new_header_file (name, valu);
2988 start_subfile (name, current_subfile->dirname);
2992 start_subfile (pop_subfile (), current_subfile->dirname);
2996 add_old_header_file (name, valu);
3000 /* This type of "symbol" really just records one line-number --
3001 core-address correspondence. Enter it in the line list for
3002 this symbol table. */
3004 /* Relocate for dynamic loading and for ELF acc
3005 function-relative symbols. */
3006 valu += function_start_offset;
3008 /* GCC 2.95.3 emits the first N_SLINE stab somwehere in the
3009 middle of the prologue instead of right at the start of the
3010 function. To deal with this we record the address for the
3011 first N_SLINE stab to be the start of the function instead of
3012 the listed location. We really shouldn't to this. When
3013 compiling with optimization, this first N_SLINE stab might be
3014 optimized away. Other (non-GCC) compilers don't emit this
3015 stab at all. There is no real harm in having an extra
3016 numbered line, although it can be a bit annoying for the
3017 user. However, it totally screws up our testsuite.
3019 So for now, keep adjusting the address of the first N_SLINE
3020 stab, but only for code compiled with GCC. */
3022 if (within_function && sline_found_in_function == 0)
3024 CORE_ADDR addr = processing_gcc_compilation == 2 ?
3025 last_function_start : valu;
3027 record_line (current_subfile, desc,
3028 gdbarch_addr_bits_remove (gdbarch, addr));
3029 sline_found_in_function = 1;
3032 record_line (current_subfile, desc,
3033 gdbarch_addr_bits_remove (gdbarch, valu));
3037 common_block_start (name, objfile);
3041 common_block_end (objfile);
3044 /* The following symbol types need to have the appropriate
3045 offset added to their value; then we process symbol
3046 definitions in the name. */
3048 case N_STSYM: /* Static symbol in data segment. */
3049 case N_LCSYM: /* Static symbol in BSS segment. */
3050 case N_ROSYM: /* Static symbol in read-only data segment. */
3051 /* HORRID HACK DEPT. However, it's Sun's furgin' fault.
3052 Solaris 2's stabs-in-elf makes *most* symbols relative but
3053 leaves a few absolute (at least for Solaris 2.1 and version
3054 2.0.1 of the SunPRO compiler). N_STSYM and friends sit on
3055 the fence. .stab "foo:S...",N_STSYM is absolute (ld
3056 relocates it) .stab "foo:V...",N_STSYM is relative (section
3057 base subtracted). This leaves us no choice but to search for
3058 the 'S' or 'V'... (or pass the whole section_offsets stuff
3059 down ONE MORE function call level, which we really don't want
3064 /* Normal object file and NLMs have non-zero text seg offsets,
3065 but don't need their static syms offset in this fashion.
3066 XXX - This is really a crock that should be fixed in the
3067 solib handling code so that I don't have to work around it
3070 if (!symfile_relocatable)
3072 p = strchr (name, ':');
3073 if (p != 0 && p[1] == 'S')
3075 /* The linker relocated it. We don't want to add an
3076 elfstab_offset_sections-type offset, but we *do*
3077 want to add whatever solib.c passed to
3078 symbol_file_add as addr (this is known to affect
3079 SunOS 4, and I suspect ELF too). Since
3080 elfstab_offset_sections currently does not muck
3081 with the text offset (there is no Ttext.text
3082 symbol), we can get addr from the text offset. If
3083 elfstab_offset_sections ever starts dealing with
3084 the text offset, and we still need to do this, we
3085 need to invent a SECT_OFF_ADDR_KLUDGE or something. */
3086 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
3087 goto define_a_symbol;
3090 /* Since it's not the kludge case, re-dispatch to the right
3101 internal_error (__FILE__, __LINE__,
3102 _("failed internal consistency check"));
3106 case_N_STSYM: /* Static symbol in data segment. */
3107 case N_DSLINE: /* Source line number, data segment. */
3108 valu += ANOFFSET (section_offsets, SECT_OFF_DATA (objfile));
3109 goto define_a_symbol;
3111 case_N_LCSYM: /* Static symbol in BSS segment. */
3112 case N_BSLINE: /* Source line number, BSS segment. */
3113 /* N_BROWS: overlaps with N_BSLINE. */
3114 valu += ANOFFSET (section_offsets, SECT_OFF_BSS (objfile));
3115 goto define_a_symbol;
3117 case_N_ROSYM: /* Static symbol in read-only data segment. */
3118 valu += ANOFFSET (section_offsets, SECT_OFF_RODATA (objfile));
3119 goto define_a_symbol;
3121 case N_ENTRY: /* Alternate entry point. */
3122 /* Relocate for dynamic loading. */
3123 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
3124 goto define_a_symbol;
3126 /* The following symbol types we don't know how to process.
3127 Handle them in a "default" way, but complain to people who
3130 case N_CATCH: /* Exception handler catcher. */
3131 case N_EHDECL: /* Exception handler name. */
3132 case N_PC: /* Global symbol in Pascal. */
3133 case N_M2C: /* Modula-2 compilation unit. */
3134 /* N_MOD2: overlaps with N_EHDECL. */
3135 case N_SCOPE: /* Modula-2 scope information. */
3136 case N_ECOML: /* End common (local name). */
3137 case N_NBTEXT: /* Gould Non-Base-Register symbols??? */
3142 unknown_symtype_complaint (hex_string (type));
3145 /* The following symbol types don't need the address field
3146 relocated, since it is either unused, or is absolute. */
3148 case N_GSYM: /* Global variable. */
3149 case N_NSYMS: /* Number of symbols (Ultrix). */
3150 case N_NOMAP: /* No map? (Ultrix). */
3151 case N_RSYM: /* Register variable. */
3152 case N_DEFD: /* Modula-2 GNU module dependency. */
3153 case N_SSYM: /* Struct or union element. */
3154 case N_LSYM: /* Local symbol in stack. */
3155 case N_PSYM: /* Parameter variable. */
3156 case N_LENG: /* Length of preceding symbol type. */
3160 char *colon_pos = strchr (name, ':');
3162 if (colon_pos == NULL)
3165 deftype = colon_pos[1];
3171 function_stab_type = type;
3173 /* Deal with the SunPRO 3.0 compiler which omits the
3174 address from N_FUN symbols. */
3176 && valu == ANOFFSET (section_offsets,
3177 SECT_OFF_TEXT (objfile))
3178 && gdbarch_sofun_address_maybe_missing (gdbarch))
3180 CORE_ADDR minsym_valu =
3181 find_stab_function_addr (name, get_last_source_file (),
3184 /* The function find_stab_function_addr will return
3185 0 if the minimal symbol wasn't found.
3186 (Unfortunately, this might also be a valid
3187 address.) Anyway, if it *does* return 0, it is
3188 likely that the value was set correctly to begin
3190 if (minsym_valu != 0)
3194 if (block_address_function_relative)
3195 /* For Solaris 2 compilers, the block addresses and
3196 N_SLINE's are relative to the start of the
3197 function. On normal systems, and when using GCC on
3198 Solaris 2, these addresses are just absolute, or
3199 relative to the N_SO, depending on
3200 BLOCK_ADDRESS_ABSOLUTE. */
3201 function_start_offset = valu;
3203 within_function = 1;
3205 if (context_stack_depth > 1)
3207 complaint (&symfile_complaints,
3208 _("unmatched N_LBRAC before symtab pos %d"),
3213 if (context_stack_depth > 0)
3215 struct block *block;
3217 new = pop_context ();
3218 /* Make a block for the local symbols within. */
3219 block = finish_block (new->name, &local_symbols,
3220 new->old_blocks, new->start_addr,
3223 /* For C++, set the block's scope. */
3224 if (SYMBOL_LANGUAGE (new->name) == language_cplus)
3225 cp_set_block_scope (new->name, block,
3226 &objfile->objfile_obstack);
3229 new = push_context (0, valu);
3230 new->name = define_symbol (valu, name, desc, type, objfile);
3234 define_symbol (valu, name, desc, type, objfile);
3240 /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it
3241 for a bunch of other flags, too. Someday we may parse their
3242 flags; for now we ignore theirs and hope they'll ignore ours. */
3243 case N_OPT: /* Solaris 2: Compiler options. */
3246 if (strcmp (name, GCC2_COMPILED_FLAG_SYMBOL) == 0)
3248 processing_gcc_compilation = 2;
3255 case N_MAIN: /* Name of main routine. */
3256 /* FIXME: If one has a symbol file with N_MAIN and then replaces
3257 it with a symbol file with "main" and without N_MAIN. I'm
3258 not sure exactly what rule to follow but probably something
3259 like: N_MAIN takes precedence over "main" no matter what
3260 objfile it is in; If there is more than one N_MAIN, choose
3261 the one in the symfile_objfile; If there is more than one
3262 N_MAIN within a given objfile, complain() and choose
3263 arbitrarily. (kingdon) */
3265 set_main_name (name);
3268 /* The following symbol types can be ignored. */
3269 case N_OBJ: /* Solaris 2: Object file dir and name. */
3270 case N_PATCH: /* Solaris 2: Patch Run Time Checker. */
3271 /* N_UNDF: Solaris 2: File separator mark. */
3272 /* N_UNDF: -- we will never encounter it, since we only process
3273 one file's symbols at once. */
3274 case N_ENDM: /* Solaris 2: End of module. */
3275 case N_ALIAS: /* SunPro F77: alias name, ignore for now. */
3279 /* '#' is a GNU C extension to allow one symbol to refer to another
3282 Generally this is used so that an alias can refer to its main
3287 /* Initialize symbol reference names and determine if this is a
3288 definition. If a symbol reference is being defined, go ahead
3289 and add it. Otherwise, just return. */
3294 /* If this stab defines a new reference ID that is not on the
3295 reference list, then put it on the reference list.
3297 We go ahead and advance NAME past the reference, even though
3298 it is not strictly necessary at this time. */
3299 refnum = symbol_reference_defined (&s);
3301 if (!ref_search (refnum))
3302 ref_add (refnum, 0, name, valu);
3306 previous_stab_code = type;
3309 /* FIXME: The only difference between this and elfstab_build_psymtabs
3310 is the call to install_minimal_symbols for elf, and the support for
3311 split sections. If the differences are really that small, the code
3312 should be shared. */
3314 /* Scan and build partial symbols for an coff symbol file.
3315 The coff file has already been processed to get its minimal symbols.
3317 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3320 OBJFILE is the object file we are reading symbols from.
3321 ADDR is the address relative to which the symbols are (e.g.
3322 the base address of the text segment).
3323 TEXTADDR is the address of the text section.
3324 TEXTSIZE is the size of the text section.
3325 STABSECTS is the list of .stab sections in OBJFILE.
3326 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3327 .stabstr section exists.
3329 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3330 adjusted for coff details. */
3333 coffstab_build_psymtabs (struct objfile *objfile,
3334 CORE_ADDR textaddr, unsigned int textsize,
3335 struct stab_section_list *stabsects,
3336 file_ptr stabstroffset, unsigned int stabstrsize)
3339 bfd *sym_bfd = objfile->obfd;
3340 char *name = bfd_get_filename (sym_bfd);
3341 struct dbx_symfile_info *info;
3342 unsigned int stabsize;
3344 /* There is already a dbx_symfile_info allocated by our caller.
3345 It might even contain some info from the coff symtab to help us. */
3346 info = DBX_SYMFILE_INFO (objfile);
3348 DBX_TEXT_ADDR (objfile) = textaddr;
3349 DBX_TEXT_SIZE (objfile) = textsize;
3351 #define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3352 DBX_SYMBOL_SIZE (objfile) = COFF_STABS_SYMBOL_SIZE;
3353 DBX_STRINGTAB_SIZE (objfile) = stabstrsize;
3355 if (stabstrsize > bfd_get_size (sym_bfd))
3356 error (_("ridiculous string table size: %d bytes"), stabstrsize);
3357 DBX_STRINGTAB (objfile) = (char *)
3358 obstack_alloc (&objfile->objfile_obstack, stabstrsize + 1);
3359 OBJSTAT (objfile, sz_strtab += stabstrsize + 1);
3361 /* Now read in the string table in one big gulp. */
3363 val = bfd_seek (sym_bfd, stabstroffset, SEEK_SET);
3365 perror_with_name (name);
3366 val = bfd_bread (DBX_STRINGTAB (objfile), stabstrsize, sym_bfd);
3367 if (val != stabstrsize)
3368 perror_with_name (name);
3370 stabsread_new_init ();
3371 buildsym_new_init ();
3372 free_header_files ();
3373 init_header_files ();
3375 processing_acc_compilation = 1;
3377 /* In a coff file, we've already installed the minimal symbols that came
3378 from the coff (non-stab) symbol table, so always act like an
3379 incremental load here. */
3380 if (stabsects->next == NULL)
3382 stabsize = bfd_section_size (sym_bfd, stabsects->section);
3383 DBX_SYMCOUNT (objfile) = stabsize / DBX_SYMBOL_SIZE (objfile);
3384 DBX_SYMTAB_OFFSET (objfile) = stabsects->section->filepos;
3388 struct stab_section_list *stabsect;
3390 DBX_SYMCOUNT (objfile) = 0;
3391 for (stabsect = stabsects; stabsect != NULL; stabsect = stabsect->next)
3393 stabsize = bfd_section_size (sym_bfd, stabsect->section);
3394 DBX_SYMCOUNT (objfile) += stabsize / DBX_SYMBOL_SIZE (objfile);
3397 DBX_SYMTAB_OFFSET (objfile) = stabsects->section->filepos;
3399 symbuf_sections = stabsects->next;
3400 symbuf_left = bfd_section_size (sym_bfd, stabsects->section);
3404 dbx_symfile_read (objfile, 0);
3407 /* Scan and build partial symbols for an ELF symbol file.
3408 This ELF file has already been processed to get its minimal symbols.
3410 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3413 OBJFILE is the object file we are reading symbols from.
3414 ADDR is the address relative to which the symbols are (e.g.
3415 the base address of the text segment).
3416 STABSECT is the BFD section information for the .stab section.
3417 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3418 .stabstr section exists.
3420 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3421 adjusted for elf details. */
3424 elfstab_build_psymtabs (struct objfile *objfile, asection *stabsect,
3425 file_ptr stabstroffset, unsigned int stabstrsize)
3428 bfd *sym_bfd = objfile->obfd;
3429 char *name = bfd_get_filename (sym_bfd);
3430 struct dbx_symfile_info *info;
3431 struct cleanup *back_to = make_cleanup (null_cleanup, NULL);
3433 /* There is already a dbx_symfile_info allocated by our caller.
3434 It might even contain some info from the ELF symtab to help us. */
3435 info = DBX_SYMFILE_INFO (objfile);
3437 /* Find the first and last text address. dbx_symfile_read seems to
3439 find_text_range (sym_bfd, objfile);
3441 #define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3442 DBX_SYMBOL_SIZE (objfile) = ELF_STABS_SYMBOL_SIZE;
3443 DBX_SYMCOUNT (objfile)
3444 = bfd_section_size (objfile->obfd, stabsect) / DBX_SYMBOL_SIZE (objfile);
3445 DBX_STRINGTAB_SIZE (objfile) = stabstrsize;
3446 DBX_SYMTAB_OFFSET (objfile) = stabsect->filepos;
3447 DBX_STAB_SECTION (objfile) = stabsect;
3449 if (stabstrsize > bfd_get_size (sym_bfd))
3450 error (_("ridiculous string table size: %d bytes"), stabstrsize);
3451 DBX_STRINGTAB (objfile) = (char *)
3452 obstack_alloc (&objfile->objfile_obstack, stabstrsize + 1);
3453 OBJSTAT (objfile, sz_strtab += stabstrsize + 1);
3455 /* Now read in the string table in one big gulp. */
3457 val = bfd_seek (sym_bfd, stabstroffset, SEEK_SET);
3459 perror_with_name (name);
3460 val = bfd_bread (DBX_STRINGTAB (objfile), stabstrsize, sym_bfd);
3461 if (val != stabstrsize)
3462 perror_with_name (name);
3464 stabsread_new_init ();
3465 buildsym_new_init ();
3466 free_header_files ();
3467 init_header_files ();
3469 processing_acc_compilation = 1;
3472 symbuf_left = bfd_section_size (objfile->obfd, stabsect);
3473 stabs_data = symfile_relocate_debug_section (objfile, stabsect, NULL);
3475 make_cleanup (free_current_contents, (void *) &stabs_data);
3477 /* In an elf file, we've already installed the minimal symbols that came
3478 from the elf (non-stab) symbol table, so always act like an
3479 incremental load here. dbx_symfile_read should not generate any new
3480 minimal symbols, since we will have already read the ELF dynamic symbol
3481 table and normal symbol entries won't be in the ".stab" section; but in
3482 case it does, it will install them itself. */
3483 dbx_symfile_read (objfile, 0);
3485 do_cleanups (back_to);
3488 /* Scan and build partial symbols for a file with special sections for stabs
3489 and stabstrings. The file has already been processed to get its minimal
3490 symbols, and any other symbols that might be necessary to resolve GSYMs.
3492 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3495 OBJFILE is the object file we are reading symbols from.
3496 ADDR is the address relative to which the symbols are (e.g. the base address
3497 of the text segment).
3498 STAB_NAME is the name of the section that contains the stabs.
3499 STABSTR_NAME is the name of the section that contains the stab strings.
3501 This routine is mostly copied from dbx_symfile_init and
3502 dbx_symfile_read. */
3505 stabsect_build_psymtabs (struct objfile *objfile, char *stab_name,
3506 char *stabstr_name, char *text_name)
3509 bfd *sym_bfd = objfile->obfd;
3510 char *name = bfd_get_filename (sym_bfd);
3512 asection *stabstrsect;
3513 asection *text_sect;
3514 struct dbx_symfile_info *dbx;
3516 stabsect = bfd_get_section_by_name (sym_bfd, stab_name);
3517 stabstrsect = bfd_get_section_by_name (sym_bfd, stabstr_name);
3523 error (_("stabsect_build_psymtabs: Found stabs (%s), "
3524 "but not string section (%s)"),
3525 stab_name, stabstr_name);
3527 dbx = XCNEW (struct dbx_symfile_info);
3528 set_objfile_data (objfile, dbx_objfile_data_key, dbx);
3530 text_sect = bfd_get_section_by_name (sym_bfd, text_name);
3532 error (_("Can't find %s section in symbol file"), text_name);
3533 DBX_TEXT_ADDR (objfile) = bfd_section_vma (sym_bfd, text_sect);
3534 DBX_TEXT_SIZE (objfile) = bfd_section_size (sym_bfd, text_sect);
3536 DBX_SYMBOL_SIZE (objfile) = sizeof (struct external_nlist);
3537 DBX_SYMCOUNT (objfile) = bfd_section_size (sym_bfd, stabsect)
3538 / DBX_SYMBOL_SIZE (objfile);
3539 DBX_STRINGTAB_SIZE (objfile) = bfd_section_size (sym_bfd, stabstrsect);
3540 DBX_SYMTAB_OFFSET (objfile) = stabsect->filepos; /* XXX - FIXME: POKING
3544 if (DBX_STRINGTAB_SIZE (objfile) > bfd_get_size (sym_bfd))
3545 error (_("ridiculous string table size: %d bytes"),
3546 DBX_STRINGTAB_SIZE (objfile));
3547 DBX_STRINGTAB (objfile) = (char *)
3548 obstack_alloc (&objfile->objfile_obstack,
3549 DBX_STRINGTAB_SIZE (objfile) + 1);
3550 OBJSTAT (objfile, sz_strtab += DBX_STRINGTAB_SIZE (objfile) + 1);
3552 /* Now read in the string table in one big gulp. */
3554 val = bfd_get_section_contents (sym_bfd, /* bfd */
3555 stabstrsect, /* bfd section */
3556 DBX_STRINGTAB (objfile), /* input buffer */
3557 0, /* offset into section */
3558 DBX_STRINGTAB_SIZE (objfile)); /* amount to
3562 perror_with_name (name);
3564 stabsread_new_init ();
3565 buildsym_new_init ();
3566 free_header_files ();
3567 init_header_files ();
3569 /* Now, do an incremental load. */
3571 processing_acc_compilation = 1;
3572 dbx_symfile_read (objfile, 0);
3575 static const struct sym_fns aout_sym_fns =
3577 bfd_target_aout_flavour,
3578 dbx_new_init, /* init anything gbl to entire symtab */
3579 dbx_symfile_init, /* read initial info, setup for sym_read() */
3580 dbx_symfile_read, /* read a symbol file into symtab */
3581 NULL, /* sym_read_psymbols */
3582 dbx_symfile_finish, /* finished with file, cleanup */
3583 default_symfile_offsets, /* parse user's offsets to internal form */
3584 default_symfile_segments, /* Get segment information from a file. */
3586 default_symfile_relocate, /* Relocate a debug section. */
3587 NULL, /* sym_probe_fns */
3592 _initialize_dbxread (void)
3594 add_symtab_fns (&aout_sym_fns);
3596 dbx_objfile_data_key
3597 = register_objfile_data_with_cleanup (NULL, dbx_free_symfile_info);