1 /* Read dbx symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986-2014 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 */
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 "aout/aout64.h"
61 #include "aout/stab_gnu.h" /* We always use GNU stabs, not
65 /* Key for dbx-associated data. */
67 const struct objfile_data *dbx_objfile_data_key;
69 /* We put a pointer to this structure in the read_symtab_private field
74 /* Offset within the file symbol table of first local symbol for this
79 /* Length (in bytes) of the section of the symbol table devoted to
80 this file's symbols (actually, the section bracketed may contain
81 more than just this file's symbols). If ldsymlen is 0, the only
82 reason for this thing's existence is the dependency list. Nothing
83 else will happen when it is read in. */
87 /* The size of each symbol in the symbol file (in external form). */
91 /* Further information needed to locate the symbols if they are in
96 int file_string_offset;
99 #define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff)
100 #define LDSYMLEN(p) (((struct symloc *)((p)->read_symtab_private))->ldsymlen)
101 #define SYMLOC(p) ((struct symloc *)((p)->read_symtab_private))
102 #define SYMBOL_SIZE(p) (SYMLOC(p)->symbol_size)
103 #define SYMBOL_OFFSET(p) (SYMLOC(p)->symbol_offset)
104 #define STRING_OFFSET(p) (SYMLOC(p)->string_offset)
105 #define FILE_STRING_OFFSET(p) (SYMLOC(p)->file_string_offset)
108 /* The objfile we are currently reading. */
110 static struct objfile *dbxread_objfile;
112 /* Remember what we deduced to be the source language of this psymtab. */
114 static enum language psymtab_language = language_unknown;
116 /* The BFD for this file -- implicit parameter to next_symbol_text. */
118 static bfd *symfile_bfd;
120 /* The size of each symbol in the symbol file (in external form).
121 This is set by dbx_symfile_read when building psymtabs, and by
122 dbx_psymtab_to_symtab when building symtabs. */
124 static unsigned symbol_size;
126 /* This is the offset of the symbol table in the executable file. */
128 static unsigned symbol_table_offset;
130 /* This is the offset of the string table in the executable file. */
132 static unsigned string_table_offset;
134 /* For elf+stab executables, the n_strx field is not a simple index
135 into the string table. Instead, each .o file has a base offset in
136 the string table, and the associated symbols contain offsets from
137 this base. The following two variables contain the base offset for
138 the current and next .o files. */
140 static unsigned int file_string_table_offset;
141 static unsigned int next_file_string_table_offset;
143 /* .o and NLM files contain unrelocated addresses which are based at
144 0. When non-zero, this flag disables some of the special cases for
145 Solaris elf+stab text addresses at location 0. */
147 static int symfile_relocatable = 0;
149 /* If this is nonzero, N_LBRAC, N_RBRAC, and N_SLINE entries are
150 relative to the function start address. */
152 static int block_address_function_relative = 0;
154 /* The lowest text address we have yet encountered. This is needed
155 because in an a.out file, there is no header field which tells us
156 what address the program is actually going to be loaded at, so we
157 need to make guesses based on the symbols (which *are* relocated to
158 reflect the address it will be loaded at). */
160 static CORE_ADDR lowest_text_address;
162 /* Non-zero if there is any line number info in the objfile. Prevents
163 end_psymtab from discarding an otherwise empty psymtab. */
165 static int has_line_numbers;
167 /* Complaints about the symbols we have encountered. */
170 unknown_symtype_complaint (const char *arg1)
172 complaint (&symfile_complaints, _("unknown symbol type %s"), arg1);
176 lbrac_mismatch_complaint (int arg1)
178 complaint (&symfile_complaints,
179 _("N_LBRAC/N_RBRAC symbol mismatch at symtab pos %d"), arg1);
183 repeated_header_complaint (const char *arg1, int arg2)
185 complaint (&symfile_complaints,
186 _("\"repeated\" header file %s not "
187 "previously seen, at symtab pos %d"),
191 /* find_text_range --- find start and end of loadable code sections
193 The find_text_range function finds the shortest address range that
194 encloses all sections containing executable code, and stores it in
195 objfile's text_addr and text_size members.
197 dbx_symfile_read will use this to finish off the partial symbol
198 table, in some cases. */
201 find_text_range (bfd * sym_bfd, struct objfile *objfile)
208 for (sec = sym_bfd->sections; sec; sec = sec->next)
209 if (bfd_get_section_flags (sym_bfd, sec) & SEC_CODE)
211 CORE_ADDR sec_start = bfd_section_vma (sym_bfd, sec);
212 CORE_ADDR sec_end = sec_start + bfd_section_size (sym_bfd, sec);
216 if (sec_start < start)
231 error (_("Can't find any code sections in symbol file"));
233 DBX_TEXT_ADDR (objfile) = start;
234 DBX_TEXT_SIZE (objfile) = end - start;
239 /* During initial symbol readin, we need to have a structure to keep
240 track of which psymtabs have which bincls in them. This structure
241 is used during readin to setup the list of dependencies within each
242 partial symbol table. */
244 struct header_file_location
246 char *name; /* Name of header file */
247 int instance; /* See above */
248 struct partial_symtab *pst; /* Partial symtab that has the
249 BINCL/EINCL defs for this file. */
252 /* The actual list and controling variables. */
253 static struct header_file_location *bincl_list, *next_bincl;
254 static int bincls_allocated;
256 /* Local function prototypes. */
258 extern void _initialize_dbxread (void);
260 static void read_ofile_symtab (struct objfile *, struct partial_symtab *);
262 static void dbx_read_symtab (struct partial_symtab *self,
263 struct objfile *objfile);
265 static void dbx_psymtab_to_symtab_1 (struct objfile *, struct partial_symtab *);
267 static void read_dbx_dynamic_symtab (struct objfile *objfile);
269 static void read_dbx_symtab (struct objfile *);
271 static void free_bincl_list (struct objfile *);
273 static struct partial_symtab *find_corresponding_bincl_psymtab (char *, int);
275 static void add_bincl_to_list (struct partial_symtab *, char *, int);
277 static void init_bincl_list (int, struct objfile *);
279 static char *dbx_next_symbol_text (struct objfile *);
281 static void fill_symbuf (bfd *);
283 static void dbx_symfile_init (struct objfile *);
285 static void dbx_new_init (struct objfile *);
287 static void dbx_symfile_read (struct objfile *, int);
289 static void dbx_symfile_finish (struct objfile *);
291 static void record_minimal_symbol (const char *, CORE_ADDR, int,
294 static void add_new_header_file (char *, int);
296 static void add_old_header_file (char *, int);
298 static void add_this_object_header_file (int);
300 static struct partial_symtab *start_psymtab (struct objfile *, char *,
302 struct partial_symbol **,
303 struct partial_symbol **);
305 /* Free up old header file tables. */
308 free_header_files (void)
310 if (this_object_header_files)
312 xfree (this_object_header_files);
313 this_object_header_files = NULL;
315 n_allocated_this_object_header_files = 0;
318 /* Allocate new header file tables. */
321 init_header_files (void)
323 n_allocated_this_object_header_files = 10;
324 this_object_header_files = (int *) xmalloc (10 * sizeof (int));
327 /* Add header file number I for this object file
328 at the next successive FILENUM. */
331 add_this_object_header_file (int i)
333 if (n_this_object_header_files == n_allocated_this_object_header_files)
335 n_allocated_this_object_header_files *= 2;
336 this_object_header_files
337 = (int *) xrealloc ((char *) this_object_header_files,
338 n_allocated_this_object_header_files * sizeof (int));
341 this_object_header_files[n_this_object_header_files++] = i;
344 /* Add to this file an "old" header file, one already seen in
345 a previous object file. NAME is the header file's name.
346 INSTANCE is its instance code, to select among multiple
347 symbol tables for the same header file. */
350 add_old_header_file (char *name, int instance)
352 struct header_file *p = HEADER_FILES (dbxread_objfile);
355 for (i = 0; i < N_HEADER_FILES (dbxread_objfile); i++)
356 if (filename_cmp (p[i].name, name) == 0 && instance == p[i].instance)
358 add_this_object_header_file (i);
361 repeated_header_complaint (name, symnum);
364 /* Add to this file a "new" header file: definitions for its types follow.
365 NAME is the header file's name.
366 Most often this happens only once for each distinct header file,
367 but not necessarily. If it happens more than once, INSTANCE has
368 a different value each time, and references to the header file
369 use INSTANCE values to select among them.
371 dbx output contains "begin" and "end" markers for each new header file,
372 but at this level we just need to know which files there have been;
373 so we record the file when its "begin" is seen and ignore the "end". */
376 add_new_header_file (char *name, int instance)
379 struct header_file *hfile;
381 /* Make sure there is room for one more header file. */
383 i = N_ALLOCATED_HEADER_FILES (dbxread_objfile);
385 if (N_HEADER_FILES (dbxread_objfile) == i)
389 N_ALLOCATED_HEADER_FILES (dbxread_objfile) = 10;
390 HEADER_FILES (dbxread_objfile) = (struct header_file *)
391 xmalloc (10 * sizeof (struct header_file));
396 N_ALLOCATED_HEADER_FILES (dbxread_objfile) = i;
397 HEADER_FILES (dbxread_objfile) = (struct header_file *)
398 xrealloc ((char *) HEADER_FILES (dbxread_objfile),
399 (i * sizeof (struct header_file)));
403 /* Create an entry for this header file. */
405 i = N_HEADER_FILES (dbxread_objfile)++;
406 hfile = HEADER_FILES (dbxread_objfile) + i;
407 hfile->name = xstrdup (name);
408 hfile->instance = instance;
411 = (struct type **) xmalloc (10 * sizeof (struct type *));
412 memset (hfile->vector, 0, 10 * sizeof (struct type *));
414 add_this_object_header_file (i);
418 static struct type **
419 explicit_lookup_type (int real_filenum, int index)
421 struct header_file *f = &HEADER_FILES (dbxread_objfile)[real_filenum];
423 if (index >= f->length)
426 f->vector = (struct type **)
427 xrealloc (f->vector, f->length * sizeof (struct type *));
428 memset (&f->vector[f->length / 2],
429 '\0', f->length * sizeof (struct type *) / 2);
431 return &f->vector[index];
436 record_minimal_symbol (const char *name, CORE_ADDR address, int type,
437 struct objfile *objfile)
439 enum minimal_symbol_type ms_type;
446 section = SECT_OFF_TEXT (objfile);
450 section = SECT_OFF_DATA (objfile);
454 section = SECT_OFF_BSS (objfile);
463 section = SECT_OFF_DATA (objfile);
466 /* I don't think this type actually exists; since a N_SETV is the result
467 of going over many .o files, it doesn't make sense to have one
469 ms_type = mst_file_data;
470 section = SECT_OFF_DATA (objfile);
477 ms_type = mst_file_text;
478 section = SECT_OFF_TEXT (objfile);
481 ms_type = mst_file_data;
483 /* Check for __DYNAMIC, which is used by Sun shared libraries.
484 Record it as global even if it's local, not global, so
485 lookup_minimal_symbol can find it. We don't check symbol_leading_char
486 because for SunOS4 it always is '_'. */
487 if (name[8] == 'C' && strcmp ("__DYNAMIC", name) == 0)
490 /* Same with virtual function tables, both global and static. */
492 const char *tempstring = name;
494 if (tempstring[0] == bfd_get_symbol_leading_char (objfile->obfd))
496 if (is_vtable_name (tempstring))
499 section = SECT_OFF_DATA (objfile);
502 ms_type = mst_file_bss;
503 section = SECT_OFF_BSS (objfile);
506 ms_type = mst_unknown;
511 if ((ms_type == mst_file_text || ms_type == mst_text)
512 && address < lowest_text_address)
513 lowest_text_address = address;
515 prim_record_minimal_symbol_and_info
516 (name, address, ms_type, section, objfile);
519 /* Scan and build partial symbols for a symbol file.
520 We have been initialized by a call to dbx_symfile_init, which
521 put all the relevant info into a "struct dbx_symfile_info",
522 hung off the objfile structure. */
525 dbx_symfile_read (struct objfile *objfile, int symfile_flags)
529 struct cleanup *back_to;
531 sym_bfd = objfile->obfd;
533 /* .o and .nlm files are relocatables with text, data and bss segs based at
534 0. This flag disables special (Solaris stabs-in-elf only) fixups for
535 symbols with a value of 0. */
537 symfile_relocatable = bfd_get_file_flags (sym_bfd) & HAS_RELOC;
539 /* This is true for Solaris (and all other systems which put stabs
540 in sections, hopefully, since it would be silly to do things
541 differently from Solaris), and false for SunOS4 and other a.out
543 block_address_function_relative =
544 ((0 == strncmp (bfd_get_target (sym_bfd), "elf", 3))
545 || (0 == strncmp (bfd_get_target (sym_bfd), "som", 3))
546 || (0 == strncmp (bfd_get_target (sym_bfd), "coff", 4))
547 || (0 == strncmp (bfd_get_target (sym_bfd), "pe", 2))
548 || (0 == strncmp (bfd_get_target (sym_bfd), "epoc-pe", 7))
549 || (0 == strncmp (bfd_get_target (sym_bfd), "nlm", 3)));
551 val = bfd_seek (sym_bfd, DBX_SYMTAB_OFFSET (objfile), SEEK_SET);
553 perror_with_name (objfile_name (objfile));
555 /* Size the symbol table. */
556 if (objfile->global_psymbols.size == 0 && objfile->static_psymbols.size == 0)
557 init_psymbol_list (objfile, DBX_SYMCOUNT (objfile));
559 symbol_size = DBX_SYMBOL_SIZE (objfile);
560 symbol_table_offset = DBX_SYMTAB_OFFSET (objfile);
562 free_pending_blocks ();
563 back_to = make_cleanup (really_free_pendings, 0);
565 init_minimal_symbol_collection ();
566 make_cleanup_discard_minimal_symbols ();
568 /* Read stabs data from executable file and define symbols. */
570 read_dbx_symtab (objfile);
572 /* Add the dynamic symbols. */
574 read_dbx_dynamic_symtab (objfile);
576 /* Install any minimal symbols that have been collected as the current
577 minimal symbols for this objfile. */
579 install_minimal_symbols (objfile);
581 do_cleanups (back_to);
584 /* Initialize anything that needs initializing when a completely new
585 symbol file is specified (not just adding some symbols from another
586 file, e.g. a shared library). */
589 dbx_new_init (struct objfile *ignore)
591 stabsread_new_init ();
592 buildsym_new_init ();
593 init_header_files ();
597 /* dbx_symfile_init ()
598 is the dbx-specific initialization routine for reading symbols.
599 It is passed a struct objfile which contains, among other things,
600 the BFD for the file whose symbols are being read, and a slot for a pointer
601 to "private data" which we fill with goodies.
603 We read the string table into malloc'd space and stash a pointer to it.
605 Since BFD doesn't know how to read debug symbols in a format-independent
606 way (and may never do so...), we have to do it ourselves. We will never
607 be called unless this is an a.out (or very similar) file.
608 FIXME, there should be a cleaner peephole into the BFD environment here. */
610 #define DBX_STRINGTAB_SIZE_SIZE sizeof(long) /* FIXME */
613 dbx_symfile_init (struct objfile *objfile)
616 bfd *sym_bfd = objfile->obfd;
617 char *name = bfd_get_filename (sym_bfd);
619 unsigned char size_temp[DBX_STRINGTAB_SIZE_SIZE];
620 struct dbx_symfile_info *dbx;
622 /* Allocate struct to keep track of the symfile. */
623 dbx = XCNEW (struct dbx_symfile_info);
624 set_objfile_data (objfile, dbx_objfile_data_key, dbx);
626 DBX_TEXT_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".text");
627 DBX_DATA_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".data");
628 DBX_BSS_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".bss");
630 /* FIXME POKING INSIDE BFD DATA STRUCTURES. */
631 #define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd))
632 #define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd))
634 /* FIXME POKING INSIDE BFD DATA STRUCTURES. */
636 DBX_SYMFILE_INFO (objfile)->stab_section_info = NULL;
638 text_sect = bfd_get_section_by_name (sym_bfd, ".text");
640 error (_("Can't find .text section in symbol file"));
641 DBX_TEXT_ADDR (objfile) = bfd_section_vma (sym_bfd, text_sect);
642 DBX_TEXT_SIZE (objfile) = bfd_section_size (sym_bfd, text_sect);
644 DBX_SYMBOL_SIZE (objfile) = obj_symbol_entry_size (sym_bfd);
645 DBX_SYMCOUNT (objfile) = bfd_get_symcount (sym_bfd);
646 DBX_SYMTAB_OFFSET (objfile) = SYMBOL_TABLE_OFFSET;
648 /* Read the string table and stash it away in the objfile_obstack.
649 When we blow away the objfile the string table goes away as well.
650 Note that gdb used to use the results of attempting to malloc the
651 string table, based on the size it read, as a form of sanity check
652 for botched byte swapping, on the theory that a byte swapped string
653 table size would be so totally bogus that the malloc would fail. Now
654 that we put in on the objfile_obstack, we can't do this since gdb gets
655 a fatal error (out of virtual memory) if the size is bogus. We can
656 however at least check to see if the size is less than the size of
657 the size field itself, or larger than the size of the entire file.
658 Note that all valid string tables have a size greater than zero, since
659 the bytes used to hold the size are included in the count. */
661 if (STRING_TABLE_OFFSET == 0)
663 /* It appears that with the existing bfd code, STRING_TABLE_OFFSET
664 will never be zero, even when there is no string table. This
665 would appear to be a bug in bfd. */
666 DBX_STRINGTAB_SIZE (objfile) = 0;
667 DBX_STRINGTAB (objfile) = NULL;
671 val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, SEEK_SET);
673 perror_with_name (name);
675 memset (size_temp, 0, sizeof (size_temp));
676 val = bfd_bread (size_temp, sizeof (size_temp), sym_bfd);
679 perror_with_name (name);
683 /* With the existing bfd code, STRING_TABLE_OFFSET will be set to
684 EOF if there is no string table, and attempting to read the size
685 from EOF will read zero bytes. */
686 DBX_STRINGTAB_SIZE (objfile) = 0;
687 DBX_STRINGTAB (objfile) = NULL;
691 /* Read some data that would appear to be the string table size.
692 If there really is a string table, then it is probably the right
693 size. Byteswap if necessary and validate the size. Note that
694 the minimum is DBX_STRINGTAB_SIZE_SIZE. If we just read some
695 random data that happened to be at STRING_TABLE_OFFSET, because
696 bfd can't tell us there is no string table, the sanity checks may
697 or may not catch this. */
698 DBX_STRINGTAB_SIZE (objfile) = bfd_h_get_32 (sym_bfd, size_temp);
700 if (DBX_STRINGTAB_SIZE (objfile) < sizeof (size_temp)
701 || DBX_STRINGTAB_SIZE (objfile) > bfd_get_size (sym_bfd))
702 error (_("ridiculous string table size (%d bytes)."),
703 DBX_STRINGTAB_SIZE (objfile));
705 DBX_STRINGTAB (objfile) =
706 (char *) obstack_alloc (&objfile->objfile_obstack,
707 DBX_STRINGTAB_SIZE (objfile));
708 OBJSTAT (objfile, sz_strtab += DBX_STRINGTAB_SIZE (objfile));
710 /* Now read in the string table in one big gulp. */
712 val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, SEEK_SET);
714 perror_with_name (name);
715 val = bfd_bread (DBX_STRINGTAB (objfile),
716 DBX_STRINGTAB_SIZE (objfile),
718 if (val != DBX_STRINGTAB_SIZE (objfile))
719 perror_with_name (name);
724 /* Perform any local cleanups required when we are done with a particular
725 objfile. I.E, we are in the process of discarding all symbol information
726 for an objfile, freeing up all memory held for it, and unlinking the
727 objfile struct from the global list of known objfiles. */
730 dbx_symfile_finish (struct objfile *objfile)
732 free_header_files ();
736 dbx_free_symfile_info (struct objfile *objfile, void *arg)
738 struct dbx_symfile_info *dbx = arg;
740 if (dbx->header_files != NULL)
742 int i = dbx->n_header_files;
743 struct header_file *hfiles = dbx->header_files;
747 xfree (hfiles[i].name);
748 xfree (hfiles[i].vector);
758 /* Buffer for reading the symbol table entries. */
759 static struct external_nlist symbuf[4096];
760 static int symbuf_idx;
761 static int symbuf_end;
763 /* Name of last function encountered. Used in Solaris to approximate
764 object file boundaries. */
765 static char *last_function_name;
767 /* The address in memory of the string table of the object file we are
768 reading (which might not be the "main" object file, but might be a
769 shared library or some other dynamically loaded thing). This is
770 set by read_dbx_symtab when building psymtabs, and by
771 read_ofile_symtab when building symtabs, and is used only by
772 next_symbol_text. FIXME: If that is true, we don't need it when
773 building psymtabs, right? */
774 static char *stringtab_global;
776 /* These variables are used to control fill_symbuf when the stabs
777 symbols are not contiguous (as may be the case when a COFF file is
778 linked using --split-by-reloc). */
779 static struct stab_section_list *symbuf_sections;
780 static unsigned int symbuf_left;
781 static unsigned int symbuf_read;
783 /* This variable stores a global stabs buffer, if we read stabs into
784 memory in one chunk in order to process relocations. */
785 static bfd_byte *stabs_data;
787 /* Refill the symbol table input buffer
788 and set the variables that control fetching entries from it.
789 Reports an error if no data available.
790 This function can read past the end of the symbol table
791 (into the string table) but this does no harm. */
794 fill_symbuf (bfd *sym_bfd)
801 nbytes = sizeof (symbuf);
802 if (nbytes > symbuf_left)
803 nbytes = symbuf_left;
804 memcpy (symbuf, stabs_data + symbuf_read, nbytes);
806 else if (symbuf_sections == NULL)
808 count = sizeof (symbuf);
809 nbytes = bfd_bread (symbuf, count, sym_bfd);
813 if (symbuf_left <= 0)
815 file_ptr filepos = symbuf_sections->section->filepos;
817 if (bfd_seek (sym_bfd, filepos, SEEK_SET) != 0)
818 perror_with_name (bfd_get_filename (sym_bfd));
819 symbuf_left = bfd_section_size (sym_bfd, symbuf_sections->section);
820 symbol_table_offset = filepos - symbuf_read;
821 symbuf_sections = symbuf_sections->next;
825 if (count > sizeof (symbuf))
826 count = sizeof (symbuf);
827 nbytes = bfd_bread (symbuf, count, sym_bfd);
831 perror_with_name (bfd_get_filename (sym_bfd));
832 else if (nbytes == 0)
833 error (_("Premature end of file reading symbol table"));
834 symbuf_end = nbytes / symbol_size;
836 symbuf_left -= nbytes;
837 symbuf_read += nbytes;
841 stabs_seek (int sym_offset)
845 symbuf_read += sym_offset;
846 symbuf_left -= sym_offset;
849 bfd_seek (symfile_bfd, sym_offset, SEEK_CUR);
852 #define INTERNALIZE_SYMBOL(intern, extern, abfd) \
854 (intern).n_strx = bfd_h_get_32 (abfd, (extern)->e_strx); \
855 (intern).n_type = bfd_h_get_8 (abfd, (extern)->e_type); \
856 (intern).n_other = 0; \
857 (intern).n_desc = bfd_h_get_16 (abfd, (extern)->e_desc); \
858 if (bfd_get_sign_extend_vma (abfd)) \
859 (intern).n_value = bfd_h_get_signed_32 (abfd, (extern)->e_value); \
861 (intern).n_value = bfd_h_get_32 (abfd, (extern)->e_value); \
864 /* Invariant: The symbol pointed to by symbuf_idx is the first one
865 that hasn't been swapped. Swap the symbol at the same time
866 that symbuf_idx is incremented. */
868 /* dbx allows the text of a symbol name to be continued into the
869 next symbol name! When such a continuation is encountered
870 (a \ at the end of the text of a name)
871 call this function to get the continuation. */
874 dbx_next_symbol_text (struct objfile *objfile)
876 struct internal_nlist nlist;
878 if (symbuf_idx == symbuf_end)
879 fill_symbuf (symfile_bfd);
882 INTERNALIZE_SYMBOL (nlist, &symbuf[symbuf_idx], symfile_bfd);
883 OBJSTAT (objfile, n_stabs++);
887 return nlist.n_strx + stringtab_global + file_string_table_offset;
890 /* Initialize the list of bincls to contain none and have some
894 init_bincl_list (int number, struct objfile *objfile)
896 bincls_allocated = number;
897 next_bincl = bincl_list = (struct header_file_location *)
898 xmalloc (bincls_allocated * sizeof (struct header_file_location));
901 /* Add a bincl to the list. */
904 add_bincl_to_list (struct partial_symtab *pst, char *name, int instance)
906 if (next_bincl >= bincl_list + bincls_allocated)
908 int offset = next_bincl - bincl_list;
910 bincls_allocated *= 2;
911 bincl_list = (struct header_file_location *)
912 xrealloc ((char *) bincl_list,
913 bincls_allocated * sizeof (struct header_file_location));
914 next_bincl = bincl_list + offset;
916 next_bincl->pst = pst;
917 next_bincl->instance = instance;
918 next_bincl++->name = name;
921 /* Given a name, value pair, find the corresponding
922 bincl in the list. Return the partial symtab associated
923 with that header_file_location. */
925 static struct partial_symtab *
926 find_corresponding_bincl_psymtab (char *name, int instance)
928 struct header_file_location *bincl;
930 for (bincl = bincl_list; bincl < next_bincl; bincl++)
931 if (bincl->instance == instance
932 && strcmp (name, bincl->name) == 0)
935 repeated_header_complaint (name, symnum);
936 return (struct partial_symtab *) 0;
939 /* Free the storage allocated for the bincl list. */
942 free_bincl_list (struct objfile *objfile)
945 bincls_allocated = 0;
949 do_free_bincl_list_cleanup (void *objfile)
951 free_bincl_list (objfile);
954 static struct cleanup *
955 make_cleanup_free_bincl_list (struct objfile *objfile)
957 return make_cleanup (do_free_bincl_list_cleanup, objfile);
960 /* Set namestring based on nlist. If the string table index is invalid,
961 give a fake name, and print a single error message per symbol file read,
962 rather than abort the symbol reading or flood the user with messages. */
965 set_namestring (struct objfile *objfile, const struct internal_nlist *nlist)
969 if (nlist->n_strx + file_string_table_offset
970 >= DBX_STRINGTAB_SIZE (objfile)
971 || nlist->n_strx + file_string_table_offset < nlist->n_strx)
973 complaint (&symfile_complaints,
974 _("bad string table offset in symbol %d"),
976 namestring = "<bad string table offset>";
979 namestring = (nlist->n_strx + file_string_table_offset
980 + DBX_STRINGTAB (objfile));
984 /* Scan a SunOs dynamic symbol table for symbols of interest and
985 add them to the minimal symbol table. */
988 read_dbx_dynamic_symtab (struct objfile *objfile)
990 bfd *abfd = objfile->obfd;
991 struct cleanup *back_to;
1001 CORE_ADDR sym_value;
1004 /* Check that the symbol file has dynamic symbols that we know about.
1005 bfd_arch_unknown can happen if we are reading a sun3 symbol file
1006 on a sun4 host (and vice versa) and bfd is not configured
1007 --with-target=all. This would trigger an assertion in bfd/sunos.c,
1008 so we ignore the dynamic symbols in this case. */
1009 if (bfd_get_flavour (abfd) != bfd_target_aout_flavour
1010 || (bfd_get_file_flags (abfd) & DYNAMIC) == 0
1011 || bfd_get_arch (abfd) == bfd_arch_unknown)
1014 dynsym_size = bfd_get_dynamic_symtab_upper_bound (abfd);
1015 if (dynsym_size < 0)
1018 dynsyms = (asymbol **) xmalloc (dynsym_size);
1019 back_to = make_cleanup (xfree, dynsyms);
1021 dynsym_count = bfd_canonicalize_dynamic_symtab (abfd, dynsyms);
1022 if (dynsym_count < 0)
1024 do_cleanups (back_to);
1028 /* Enter dynamic symbols into the minimal symbol table
1029 if this is a stripped executable. */
1030 if (bfd_get_symcount (abfd) <= 0)
1033 for (counter = 0; counter < dynsym_count; counter++, symptr++)
1035 asymbol *sym = *symptr;
1039 sec = bfd_get_section (sym);
1041 /* BFD symbols are section relative. */
1042 sym_value = sym->value + sec->vma;
1044 if (bfd_get_section_flags (abfd, sec) & SEC_CODE)
1048 else if (bfd_get_section_flags (abfd, sec) & SEC_DATA)
1052 else if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
1059 if (sym->flags & BSF_GLOBAL)
1062 record_minimal_symbol (bfd_asymbol_name (sym), sym_value,
1067 /* Symbols from shared libraries have a dynamic relocation entry
1068 that points to the associated slot in the procedure linkage table.
1069 We make a mininal symbol table entry with type mst_solib_trampoline
1070 at the address in the procedure linkage table. */
1071 dynrel_size = bfd_get_dynamic_reloc_upper_bound (abfd);
1072 if (dynrel_size < 0)
1074 do_cleanups (back_to);
1078 dynrels = (arelent **) xmalloc (dynrel_size);
1079 make_cleanup (xfree, dynrels);
1081 dynrel_count = bfd_canonicalize_dynamic_reloc (abfd, dynrels, dynsyms);
1082 if (dynrel_count < 0)
1084 do_cleanups (back_to);
1088 for (counter = 0, relptr = dynrels;
1089 counter < dynrel_count;
1090 counter++, relptr++)
1092 arelent *rel = *relptr;
1093 CORE_ADDR address = rel->address;
1095 switch (bfd_get_arch (abfd))
1097 case bfd_arch_sparc:
1098 if (rel->howto->type != RELOC_JMP_SLOT)
1102 /* `16' is the type BFD produces for a jump table relocation. */
1103 if (rel->howto->type != 16)
1106 /* Adjust address in the jump table to point to
1107 the start of the bsr instruction. */
1114 name = bfd_asymbol_name (*rel->sym_ptr_ptr);
1115 prim_record_minimal_symbol (name, address, mst_solib_trampoline,
1119 do_cleanups (back_to);
1123 find_stab_function_addr (char *namestring, const char *filename,
1124 struct objfile *objfile)
1126 struct bound_minimal_symbol msym;
1130 p = strchr (namestring, ':');
1135 strncpy (p, namestring, n);
1138 msym = lookup_minimal_symbol (p, filename, objfile);
1139 if (msym.minsym == NULL)
1141 /* Sun Fortran appends an underscore to the minimal symbol name,
1142 try again with an appended underscore if the minimal symbol
1146 msym = lookup_minimal_symbol (p, filename, objfile);
1149 if (msym.minsym == NULL && filename != NULL)
1151 /* Try again without the filename. */
1153 msym = lookup_minimal_symbol (p, NULL, objfile);
1155 if (msym.minsym == NULL && filename != NULL)
1157 /* And try again for Sun Fortran, but without the filename. */
1160 msym = lookup_minimal_symbol (p, NULL, objfile);
1163 return msym.minsym == NULL ? 0 : BMSYMBOL_VALUE_ADDRESS (msym);
1167 function_outside_compilation_unit_complaint (const char *arg1)
1169 complaint (&symfile_complaints,
1170 _("function `%s' appears to be defined "
1171 "outside of all compilation units"),
1175 /* Setup partial_symtab's describing each source file for which
1176 debugging information is available. */
1179 read_dbx_symtab (struct objfile *objfile)
1181 struct gdbarch *gdbarch = get_objfile_arch (objfile);
1182 struct external_nlist *bufp = 0; /* =0 avoids gcc -Wall glitch. */
1183 struct internal_nlist nlist;
1184 CORE_ADDR text_addr;
1191 int past_first_source_file = 0;
1192 CORE_ADDR last_function_start = 0;
1193 struct cleanup *back_to;
1195 int textlow_not_set;
1196 int data_sect_index;
1198 /* Current partial symtab. */
1199 struct partial_symtab *pst;
1201 /* List of current psymtab's include files. */
1202 const char **psymtab_include_list;
1203 int includes_allocated;
1206 /* Index within current psymtab dependency list. */
1207 struct partial_symtab **dependency_list;
1208 int dependencies_used, dependencies_allocated;
1210 text_addr = DBX_TEXT_ADDR (objfile);
1211 text_size = DBX_TEXT_SIZE (objfile);
1213 /* FIXME. We probably want to change stringtab_global rather than add this
1214 while processing every symbol entry. FIXME. */
1215 file_string_table_offset = 0;
1216 next_file_string_table_offset = 0;
1218 stringtab_global = DBX_STRINGTAB (objfile);
1220 pst = (struct partial_symtab *) 0;
1222 includes_allocated = 30;
1224 psymtab_include_list = (const char **) alloca (includes_allocated *
1225 sizeof (const char *));
1227 dependencies_allocated = 30;
1228 dependencies_used = 0;
1230 (struct partial_symtab **) alloca (dependencies_allocated *
1231 sizeof (struct partial_symtab *));
1233 /* Init bincl list */
1234 init_bincl_list (20, objfile);
1235 back_to = make_cleanup_free_bincl_list (objfile);
1237 set_last_source_file (NULL);
1239 lowest_text_address = (CORE_ADDR) -1;
1241 symfile_bfd = objfile->obfd; /* For next_text_symbol. */
1242 abfd = objfile->obfd;
1243 symbuf_end = symbuf_idx = 0;
1244 next_symbol_text_func = dbx_next_symbol_text;
1245 textlow_not_set = 1;
1246 has_line_numbers = 0;
1248 /* FIXME: jimb/2003-09-12: We don't apply the right section's offset
1249 to global and static variables. The stab for a global or static
1250 variable doesn't give us any indication of which section it's in,
1251 so we can't tell immediately which offset in
1252 objfile->section_offsets we should apply to the variable's
1255 We could certainly find out which section contains the variable
1256 by looking up the variable's unrelocated address with
1257 find_pc_section, but that would be expensive; this is the
1258 function that constructs the partial symbol tables by examining
1259 every symbol in the entire executable, and it's
1260 performance-critical. So that expense would not be welcome. I'm
1261 not sure what to do about this at the moment.
1263 What we have done for years is to simply assume that the .data
1264 section's offset is appropriate for all global and static
1265 variables. Recently, this was expanded to fall back to the .bss
1266 section's offset if there is no .data section, and then to the
1267 .rodata section's offset. */
1268 data_sect_index = objfile->sect_index_data;
1269 if (data_sect_index == -1)
1270 data_sect_index = SECT_OFF_BSS (objfile);
1271 if (data_sect_index == -1)
1272 data_sect_index = SECT_OFF_RODATA (objfile);
1274 /* If data_sect_index is still -1, that's okay. It's perfectly fine
1275 for the file to have no .data, no .bss, and no .text at all, if
1276 it also has no global or static variables. If it does, we will
1277 get an internal error from an ANOFFSET macro below when we try to
1278 use data_sect_index. */
1280 for (symnum = 0; symnum < DBX_SYMCOUNT (objfile); symnum++)
1282 /* Get the symbol for this run and pull out some info. */
1283 QUIT; /* Allow this to be interruptable. */
1284 if (symbuf_idx == symbuf_end)
1286 bufp = &symbuf[symbuf_idx++];
1289 * Special case to speed up readin.
1291 if (bfd_h_get_8 (abfd, bufp->e_type) == N_SLINE)
1293 has_line_numbers = 1;
1297 INTERNALIZE_SYMBOL (nlist, bufp, abfd);
1298 OBJSTAT (objfile, n_stabs++);
1300 /* Ok. There is a lot of code duplicated in the rest of this
1301 switch statement (for efficiency reasons). Since I don't
1302 like duplicating code, I will do my penance here, and
1303 describe the code which is duplicated:
1305 *) The assignment to namestring.
1306 *) The call to strchr.
1307 *) The addition of a partial symbol the two partial
1308 symbol lists. This last is a large section of code, so
1309 I've imbedded it in the following macro. */
1311 switch (nlist.n_type)
1314 * Standard, external, non-debugger, symbols
1317 case N_TEXT | N_EXT:
1318 case N_NBTEXT | N_EXT:
1321 case N_DATA | N_EXT:
1322 case N_NBDATA | N_EXT:
1327 case N_NBBSS | N_EXT:
1328 case N_SETV | N_EXT: /* FIXME, is this in BSS? */
1333 namestring = set_namestring (objfile, &nlist);
1335 record_minimal_symbol (namestring, nlist.n_value,
1336 nlist.n_type, objfile); /* Always */
1339 /* Standard, local, non-debugger, symbols. */
1343 /* We need to be able to deal with both N_FN or N_TEXT,
1344 because we have no way of knowing whether the sys-supplied ld
1345 or GNU ld was used to make the executable. Sequents throw
1346 in another wrinkle -- they renumbered N_FN. */
1351 namestring = set_namestring (objfile, &nlist);
1353 if ((namestring[0] == '-' && namestring[1] == 'l')
1354 || (namestring[(nsl = strlen (namestring)) - 1] == 'o'
1355 && namestring[nsl - 2] == '.'))
1357 nlist.n_value += ANOFFSET (objfile->section_offsets,
1358 SECT_OFF_TEXT (objfile));
1360 if (past_first_source_file && pst
1361 /* The gould NP1 uses low values for .o and -l symbols
1362 which are not the address. */
1363 && nlist.n_value >= pst->textlow)
1365 end_psymtab (objfile, pst, psymtab_include_list,
1366 includes_used, symnum * symbol_size,
1367 nlist.n_value > pst->texthigh
1368 ? nlist.n_value : pst->texthigh,
1369 dependency_list, dependencies_used,
1371 pst = (struct partial_symtab *) 0;
1373 dependencies_used = 0;
1374 has_line_numbers = 0;
1377 past_first_source_file = 1;
1386 case N_UNDF | N_EXT:
1387 /* The case (nlist.n_value != 0) is a "Fortran COMMON" symbol.
1388 We used to rely on the target to tell us whether it knows
1389 where the symbol has been relocated to, but none of the
1390 target implementations actually provided that operation.
1391 So we just ignore the symbol, the same way we would do if
1392 we had a target-side symbol lookup which returned no match.
1394 All other symbols (with nlist.n_value == 0), are really
1395 undefined, and so we ignore them too. */
1399 if (processing_acc_compilation && nlist.n_strx == 1)
1401 /* Deal with relative offsets in the string table
1402 used in ELF+STAB under Solaris. If we want to use the
1403 n_strx field, which contains the name of the file,
1404 we must adjust file_string_table_offset *before* calling
1405 set_namestring(). */
1406 past_first_source_file = 1;
1407 file_string_table_offset = next_file_string_table_offset;
1408 next_file_string_table_offset =
1409 file_string_table_offset + nlist.n_value;
1410 if (next_file_string_table_offset < file_string_table_offset)
1411 error (_("string table offset backs up at %d"), symnum);
1412 /* FIXME -- replace error() with complaint. */
1417 /* Lots of symbol types we can just ignore. */
1424 /* Keep going . . . */
1427 * Special symbol types for GNU
1430 case N_INDR | N_EXT:
1432 case N_SETA | N_EXT:
1434 case N_SETT | N_EXT:
1436 case N_SETD | N_EXT:
1438 case N_SETB | N_EXT:
1449 static int prev_so_symnum = -10;
1450 static int first_so_symnum;
1452 static char *dirname_nso;
1453 int prev_textlow_not_set;
1455 valu = nlist.n_value + ANOFFSET (objfile->section_offsets,
1456 SECT_OFF_TEXT (objfile));
1458 prev_textlow_not_set = textlow_not_set;
1460 /* A zero value is probably an indication for the SunPRO 3.0
1461 compiler. end_psymtab explicitly tests for zero, so
1462 don't relocate it. */
1464 if (nlist.n_value == 0
1465 && gdbarch_sofun_address_maybe_missing (gdbarch))
1467 textlow_not_set = 1;
1471 textlow_not_set = 0;
1473 past_first_source_file = 1;
1475 if (prev_so_symnum != symnum - 1)
1476 { /* Here if prev stab wasn't N_SO. */
1477 first_so_symnum = symnum;
1481 end_psymtab (objfile, pst, psymtab_include_list,
1482 includes_used, symnum * symbol_size,
1483 valu > pst->texthigh ? valu : pst->texthigh,
1484 dependency_list, dependencies_used,
1485 prev_textlow_not_set);
1486 pst = (struct partial_symtab *) 0;
1488 dependencies_used = 0;
1489 has_line_numbers = 0;
1493 prev_so_symnum = symnum;
1495 /* End the current partial symtab and start a new one. */
1497 namestring = set_namestring (objfile, &nlist);
1499 /* Null name means end of .o file. Don't start a new one. */
1500 if (*namestring == '\000')
1503 /* Some compilers (including gcc) emit a pair of initial N_SOs.
1504 The first one is a directory name; the second the file name.
1505 If pst exists, is empty, and has a filename ending in '/',
1506 we assume the previous N_SO was a directory name. */
1508 p = lbasename (namestring);
1509 if (p != namestring && *p == '\000')
1511 /* Save the directory name SOs locally, then save it into
1512 the psymtab when it's created below. */
1513 dirname_nso = namestring;
1517 /* Some other compilers (C++ ones in particular) emit useless
1518 SOs for non-existant .c files. We ignore all subsequent SOs
1519 that immediately follow the first. */
1523 pst = start_psymtab (objfile,
1525 first_so_symnum * symbol_size,
1526 objfile->global_psymbols.next,
1527 objfile->static_psymbols.next);
1528 pst->dirname = dirname_nso;
1536 enum language tmp_language;
1538 /* Add this bincl to the bincl_list for future EXCLs. No
1539 need to save the string; it'll be around until
1540 read_dbx_symtab function returns. */
1542 namestring = set_namestring (objfile, &nlist);
1543 tmp_language = deduce_language_from_filename (namestring);
1545 /* Only change the psymtab's language if we've learned
1546 something useful (eg. tmp_language is not language_unknown).
1547 In addition, to match what start_subfile does, never change
1549 if (tmp_language != language_unknown
1550 && (tmp_language != language_c
1551 || psymtab_language != language_cplus))
1552 psymtab_language = tmp_language;
1556 /* FIXME: we should not get here without a PST to work on.
1557 Attempt to recover. */
1558 complaint (&symfile_complaints,
1559 _("N_BINCL %s not in entries for "
1560 "any file, at symtab pos %d"),
1561 namestring, symnum);
1564 add_bincl_to_list (pst, namestring, nlist.n_value);
1566 /* Mark down an include file in the current psymtab. */
1568 goto record_include_file;
1573 enum language tmp_language;
1575 /* Mark down an include file in the current psymtab. */
1576 namestring = set_namestring (objfile, &nlist);
1577 tmp_language = deduce_language_from_filename (namestring);
1579 /* Only change the psymtab's language if we've learned
1580 something useful (eg. tmp_language is not language_unknown).
1581 In addition, to match what start_subfile does, never change
1583 if (tmp_language != language_unknown
1584 && (tmp_language != language_c
1585 || psymtab_language != language_cplus))
1586 psymtab_language = tmp_language;
1588 /* In C++, one may expect the same filename to come round many
1589 times, when code is coming alternately from the main file
1590 and from inline functions in other files. So I check to see
1591 if this is a file we've seen before -- either the main
1592 source file, or a previously included file.
1594 This seems to be a lot of time to be spending on N_SOL, but
1595 things like "break c-exp.y:435" need to work (I
1596 suppose the psymtab_include_list could be hashed or put
1597 in a binary tree, if profiling shows this is a major hog). */
1598 if (pst && filename_cmp (namestring, pst->filename) == 0)
1603 for (i = 0; i < includes_used; i++)
1604 if (filename_cmp (namestring, psymtab_include_list[i]) == 0)
1613 record_include_file:
1615 psymtab_include_list[includes_used++] = namestring;
1616 if (includes_used >= includes_allocated)
1618 const char **orig = psymtab_include_list;
1620 psymtab_include_list = (const char **)
1621 alloca ((includes_allocated *= 2) * sizeof (const char *));
1622 memcpy (psymtab_include_list, orig,
1623 includes_used * sizeof (const char *));
1627 case N_LSYM: /* Typedef or automatic variable. */
1628 case N_STSYM: /* Data seg var -- static. */
1629 case N_LCSYM: /* BSS " */
1630 case N_ROSYM: /* Read-only data seg var -- static. */
1631 case N_NBSTS: /* Gould nobase. */
1632 case N_NBLCS: /* symbols. */
1634 case N_GSYM: /* Global (extern) variable; can be
1635 data or bss (sigh FIXME). */
1637 /* Following may probably be ignored; I'll leave them here
1638 for now (until I do Pascal and Modula 2 extensions). */
1640 case N_PC: /* I may or may not need this; I
1642 case N_M2C: /* I suspect that I can ignore this here. */
1643 case N_SCOPE: /* Same. */
1647 namestring = set_namestring (objfile, &nlist);
1649 /* See if this is an end of function stab. */
1650 if (pst && nlist.n_type == N_FUN && *namestring == '\000')
1654 /* It's value is the size (in bytes) of the function for
1655 function relative stabs, or the address of the function's
1656 end for old style stabs. */
1657 valu = nlist.n_value + last_function_start;
1658 if (pst->texthigh == 0 || valu > pst->texthigh)
1659 pst->texthigh = valu;
1663 p = (char *) strchr (namestring, ':');
1665 continue; /* Not a debugging symbol. */
1668 sym_name = NULL; /* pacify "gcc -Werror" */
1669 if (psymtab_language == language_cplus)
1671 char *new_name, *name = xmalloc (p - namestring + 1);
1672 memcpy (name, namestring, p - namestring);
1674 name[p - namestring] = '\0';
1675 new_name = cp_canonicalize_string (name);
1676 if (new_name != NULL)
1678 sym_len = strlen (new_name);
1679 sym_name = obstack_copy0 (&objfile->objfile_obstack,
1688 sym_name = namestring;
1689 sym_len = p - namestring;
1692 /* Main processing section for debugging symbols which
1693 the initial read through the symbol tables needs to worry
1694 about. If we reach this point, the symbol which we are
1695 considering is definitely one we are interested in.
1696 p must also contain the (valid) index into the namestring
1697 which indicates the debugging type symbol. */
1702 nlist.n_value += ANOFFSET (objfile->section_offsets,
1705 if (gdbarch_static_transform_name_p (gdbarch))
1706 gdbarch_static_transform_name (gdbarch, namestring);
1708 add_psymbol_to_list (sym_name, sym_len, 1,
1709 VAR_DOMAIN, LOC_STATIC,
1710 &objfile->static_psymbols,
1712 psymtab_language, objfile);
1716 nlist.n_value += ANOFFSET (objfile->section_offsets,
1718 /* The addresses in these entries are reported to be
1719 wrong. See the code that reads 'G's for symtabs. */
1720 add_psymbol_to_list (sym_name, sym_len, 1,
1721 VAR_DOMAIN, LOC_STATIC,
1722 &objfile->global_psymbols,
1724 psymtab_language, objfile);
1728 /* When a 'T' entry is defining an anonymous enum, it
1729 may have a name which is the empty string, or a
1730 single space. Since they're not really defining a
1731 symbol, those shouldn't go in the partial symbol
1732 table. We do pick up the elements of such enums at
1733 'check_enum:', below. */
1734 if (p >= namestring + 2
1735 || (p == namestring + 1
1736 && namestring[0] != ' '))
1738 add_psymbol_to_list (sym_name, sym_len, 1,
1739 STRUCT_DOMAIN, LOC_TYPEDEF,
1740 &objfile->static_psymbols,
1742 psymtab_language, objfile);
1745 /* Also a typedef with the same name. */
1746 add_psymbol_to_list (sym_name, sym_len, 1,
1747 VAR_DOMAIN, LOC_TYPEDEF,
1748 &objfile->static_psymbols,
1750 psymtab_language, objfile);
1757 if (p != namestring) /* a name is there, not just :T... */
1759 add_psymbol_to_list (sym_name, sym_len, 1,
1760 VAR_DOMAIN, LOC_TYPEDEF,
1761 &objfile->static_psymbols,
1763 psymtab_language, objfile);
1766 /* If this is an enumerated type, we need to
1767 add all the enum constants to the partial symbol
1768 table. This does not cover enums without names, e.g.
1769 "enum {a, b} c;" in C, but fortunately those are
1770 rare. There is no way for GDB to find those from the
1771 enum type without spending too much time on it. Thus
1772 to solve this problem, the compiler needs to put out the
1773 enum in a nameless type. GCC2 does this. */
1775 /* We are looking for something of the form
1776 <name> ":" ("t" | "T") [<number> "="] "e"
1777 {<constant> ":" <value> ","} ";". */
1779 /* Skip over the colon and the 't' or 'T'. */
1781 /* This type may be given a number. Also, numbers can come
1782 in pairs like (0,26). Skip over it. */
1783 while ((*p >= '0' && *p <= '9')
1784 || *p == '(' || *p == ',' || *p == ')'
1790 /* The aix4 compiler emits extra crud before the members. */
1793 /* Skip over the type (?). */
1797 /* Skip over the colon. */
1801 /* We have found an enumerated type. */
1802 /* According to comments in read_enum_type
1803 a comma could end it instead of a semicolon.
1804 I don't know where that happens.
1806 while (*p && *p != ';' && *p != ',')
1810 /* Check for and handle cretinous dbx symbol name
1812 if (*p == '\\' || (*p == '?' && p[1] == '\0'))
1813 p = next_symbol_text (objfile);
1815 /* Point to the character after the name
1816 of the enum constant. */
1817 for (q = p; *q && *q != ':'; q++)
1819 /* Note that the value doesn't matter for
1820 enum constants in psymtabs, just in symtabs. */
1821 add_psymbol_to_list (p, q - p, 1,
1822 VAR_DOMAIN, LOC_CONST,
1823 &objfile->static_psymbols, 0,
1824 0, psymtab_language, objfile);
1825 /* Point past the name. */
1827 /* Skip over the value. */
1828 while (*p && *p != ',')
1830 /* Advance past the comma. */
1838 /* Constant, e.g. from "const" in Pascal. */
1839 add_psymbol_to_list (sym_name, sym_len, 1,
1840 VAR_DOMAIN, LOC_CONST,
1841 &objfile->static_psymbols, nlist.n_value,
1842 0, psymtab_language, objfile);
1848 int name_len = p - namestring;
1849 char *name = xmalloc (name_len + 1);
1851 memcpy (name, namestring, name_len);
1852 name[name_len] = '\0';
1853 function_outside_compilation_unit_complaint (name);
1856 nlist.n_value += ANOFFSET (objfile->section_offsets,
1857 SECT_OFF_TEXT (objfile));
1858 /* Kludges for ELF/STABS with Sun ACC. */
1859 last_function_name = namestring;
1860 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1861 value for the bottom of the text seg in those cases. */
1862 if (nlist.n_value == ANOFFSET (objfile->section_offsets,
1863 SECT_OFF_TEXT (objfile))
1864 && gdbarch_sofun_address_maybe_missing (gdbarch))
1866 CORE_ADDR minsym_valu =
1867 find_stab_function_addr (namestring,
1868 pst ? pst->filename : NULL,
1871 /* find_stab_function_addr will return 0 if the minimal
1872 symbol wasn't found. (Unfortunately, this might also
1873 be a valid address.) Anyway, if it *does* return 0,
1874 it is likely that the value was set correctly to begin
1876 if (minsym_valu != 0)
1877 nlist.n_value = minsym_valu;
1879 if (pst && textlow_not_set
1880 && gdbarch_sofun_address_maybe_missing (gdbarch))
1882 pst->textlow = nlist.n_value;
1883 textlow_not_set = 0;
1887 /* Keep track of the start of the last function so we
1888 can handle end of function symbols. */
1889 last_function_start = nlist.n_value;
1891 /* In reordered executables this function may lie outside
1892 the bounds created by N_SO symbols. If that's the case
1893 use the address of this function as the low bound for
1894 the partial symbol table. */
1897 || (nlist.n_value < pst->textlow
1899 != ANOFFSET (objfile->section_offsets,
1900 SECT_OFF_TEXT (objfile))))))
1902 pst->textlow = nlist.n_value;
1903 textlow_not_set = 0;
1905 add_psymbol_to_list (sym_name, sym_len, 1,
1906 VAR_DOMAIN, LOC_BLOCK,
1907 &objfile->static_psymbols,
1909 psymtab_language, objfile);
1912 /* Global functions were ignored here, but now they
1913 are put into the global psymtab like one would expect.
1914 They're also in the minimal symbol table. */
1918 int name_len = p - namestring;
1919 char *name = xmalloc (name_len + 1);
1921 memcpy (name, namestring, name_len);
1922 name[name_len] = '\0';
1923 function_outside_compilation_unit_complaint (name);
1926 nlist.n_value += ANOFFSET (objfile->section_offsets,
1927 SECT_OFF_TEXT (objfile));
1928 /* Kludges for ELF/STABS with Sun ACC. */
1929 last_function_name = namestring;
1930 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1931 value for the bottom of the text seg in those cases. */
1932 if (nlist.n_value == ANOFFSET (objfile->section_offsets,
1933 SECT_OFF_TEXT (objfile))
1934 && gdbarch_sofun_address_maybe_missing (gdbarch))
1936 CORE_ADDR minsym_valu =
1937 find_stab_function_addr (namestring,
1938 pst ? pst->filename : NULL,
1941 /* find_stab_function_addr will return 0 if the minimal
1942 symbol wasn't found. (Unfortunately, this might also
1943 be a valid address.) Anyway, if it *does* return 0,
1944 it is likely that the value was set correctly to begin
1946 if (minsym_valu != 0)
1947 nlist.n_value = minsym_valu;
1949 if (pst && textlow_not_set
1950 && gdbarch_sofun_address_maybe_missing (gdbarch))
1952 pst->textlow = nlist.n_value;
1953 textlow_not_set = 0;
1957 /* Keep track of the start of the last function so we
1958 can handle end of function symbols. */
1959 last_function_start = nlist.n_value;
1961 /* In reordered executables this function may lie outside
1962 the bounds created by N_SO symbols. If that's the case
1963 use the address of this function as the low bound for
1964 the partial symbol table. */
1967 || (nlist.n_value < pst->textlow
1969 != ANOFFSET (objfile->section_offsets,
1970 SECT_OFF_TEXT (objfile))))))
1972 pst->textlow = nlist.n_value;
1973 textlow_not_set = 0;
1975 add_psymbol_to_list (sym_name, sym_len, 1,
1976 VAR_DOMAIN, LOC_BLOCK,
1977 &objfile->global_psymbols,
1979 psymtab_language, objfile);
1982 /* Two things show up here (hopefully); static symbols of
1983 local scope (static used inside braces) or extensions
1984 of structure symbols. We can ignore both. */
1998 case '#': /* For symbol identification (used in live ranges). */
2002 /* It is a C++ nested symbol. We don't need to record it
2003 (I don't think); if we try to look up foo::bar::baz,
2004 then symbols for the symtab containing foo should get
2005 read in, I think. */
2006 /* Someone says sun cc puts out symbols like
2007 /foo/baz/maclib::/usr/local/bin/maclib,
2008 which would get here with a symbol type of ':'. */
2012 /* Unexpected symbol descriptor. The second and subsequent stabs
2013 of a continued stab can show up here. The question is
2014 whether they ever can mimic a normal stab--it would be
2015 nice if not, since we certainly don't want to spend the
2016 time searching to the end of every string looking for
2019 complaint (&symfile_complaints,
2020 _("unknown symbol descriptor `%c'"),
2023 /* Ignore it; perhaps it is an extension that we don't
2031 namestring = set_namestring (objfile, &nlist);
2033 /* Find the corresponding bincl and mark that psymtab on the
2034 psymtab dependency list. */
2036 struct partial_symtab *needed_pst =
2037 find_corresponding_bincl_psymtab (namestring, nlist.n_value);
2039 /* If this include file was defined earlier in this file,
2041 if (needed_pst == pst)
2049 for (i = 0; i < dependencies_used; i++)
2050 if (dependency_list[i] == needed_pst)
2056 /* If it's already in the list, skip the rest. */
2060 dependency_list[dependencies_used++] = needed_pst;
2061 if (dependencies_used >= dependencies_allocated)
2063 struct partial_symtab **orig = dependency_list;
2066 (struct partial_symtab **)
2067 alloca ((dependencies_allocated *= 2)
2068 * sizeof (struct partial_symtab *));
2069 memcpy (dependency_list, orig,
2071 * sizeof (struct partial_symtab *)));
2073 fprintf_unfiltered (gdb_stderr,
2074 "Had to reallocate "
2075 "dependency list.\n");
2076 fprintf_unfiltered (gdb_stderr,
2077 "New dependencies allocated: %d\n",
2078 dependencies_allocated);
2086 /* Solaris 2 end of module, finish current partial symbol table.
2087 end_psymtab will set pst->texthigh to the proper value, which
2088 is necessary if a module compiled without debugging info
2089 follows this module. */
2090 if (pst && gdbarch_sofun_address_maybe_missing (gdbarch))
2092 end_psymtab (objfile, pst, psymtab_include_list, includes_used,
2093 symnum * symbol_size,
2094 (CORE_ADDR) 0, dependency_list,
2095 dependencies_used, textlow_not_set);
2096 pst = (struct partial_symtab *) 0;
2098 dependencies_used = 0;
2099 has_line_numbers = 0;
2105 HANDLE_RBRAC (nlist.n_value);
2111 case N_SSYM: /* Claim: Structure or union element.
2112 Hopefully, I can ignore this. */
2113 case N_ENTRY: /* Alternate entry point; can ignore. */
2114 case N_MAIN: /* Can definitely ignore this. */
2115 case N_CATCH: /* These are GNU C++ extensions */
2116 case N_EHDECL: /* that can safely be ignored here. */
2126 case N_NSYMS: /* Ultrix 4.0: symbol count */
2127 case N_DEFD: /* GNU Modula-2 */
2128 case N_ALIAS: /* SunPro F77: alias name, ignore for now. */
2130 case N_OBJ: /* Useless types from Solaris. */
2133 /* These symbols aren't interesting; don't worry about them. */
2137 /* If we haven't found it yet, ignore it. It's probably some
2138 new type we don't know about yet. */
2139 unknown_symtype_complaint (hex_string (nlist.n_type));
2144 /* If there's stuff to be cleaned up, clean it up. */
2147 /* Don't set pst->texthigh lower than it already is. */
2148 CORE_ADDR text_end =
2149 (lowest_text_address == (CORE_ADDR) -1
2150 ? (text_addr + ANOFFSET (objfile->section_offsets,
2151 SECT_OFF_TEXT (objfile)))
2152 : lowest_text_address)
2155 end_psymtab (objfile, pst, psymtab_include_list, includes_used,
2156 symnum * symbol_size,
2157 text_end > pst->texthigh ? text_end : pst->texthigh,
2158 dependency_list, dependencies_used, textlow_not_set);
2161 do_cleanups (back_to);
2164 /* Allocate and partially fill a partial symtab. It will be
2165 completely filled at the end of the symbol list.
2167 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2168 is the address relative to which its symbols are (incremental) or 0
2171 static struct partial_symtab *
2172 start_psymtab (struct objfile *objfile, char *filename, CORE_ADDR textlow,
2173 int ldsymoff, struct partial_symbol **global_syms,
2174 struct partial_symbol **static_syms)
2176 struct partial_symtab *result =
2177 start_psymtab_common (objfile, objfile->section_offsets,
2178 filename, textlow, global_syms, static_syms);
2180 result->read_symtab_private = obstack_alloc (&objfile->objfile_obstack,
2181 sizeof (struct symloc));
2182 LDSYMOFF (result) = ldsymoff;
2183 result->read_symtab = dbx_read_symtab;
2184 SYMBOL_SIZE (result) = symbol_size;
2185 SYMBOL_OFFSET (result) = symbol_table_offset;
2186 STRING_OFFSET (result) = string_table_offset;
2187 FILE_STRING_OFFSET (result) = file_string_table_offset;
2190 /* If we're handling an ELF file, drag some section-relocation info
2191 for this source file out of the ELF symbol table, to compensate for
2192 Sun brain death. This replaces the section_offsets in this psymtab,
2194 elfstab_offset_sections (objfile, result);
2197 /* Deduce the source language from the filename for this psymtab. */
2198 psymtab_language = deduce_language_from_filename (filename);
2203 /* Close off the current usage of PST.
2204 Returns PST or NULL if the partial symtab was empty and thrown away.
2206 FIXME: List variables and peculiarities of same. */
2208 struct partial_symtab *
2209 end_psymtab (struct objfile *objfile, struct partial_symtab *pst,
2210 const char **include_list, int num_includes,
2211 int capping_symbol_offset, CORE_ADDR capping_text,
2212 struct partial_symtab **dependency_list, int number_dependencies,
2213 int textlow_not_set)
2216 struct gdbarch *gdbarch = get_objfile_arch (objfile);
2218 if (capping_symbol_offset != -1)
2219 LDSYMLEN (pst) = capping_symbol_offset - LDSYMOFF (pst);
2220 pst->texthigh = capping_text;
2222 /* Under Solaris, the N_SO symbols always have a value of 0,
2223 instead of the usual address of the .o file. Therefore,
2224 we have to do some tricks to fill in texthigh and textlow.
2225 The first trick is: if we see a static
2226 or global function, and the textlow for the current pst
2227 is not set (ie: textlow_not_set), then we use that function's
2228 address for the textlow of the pst. */
2230 /* Now, to fill in texthigh, we remember the last function seen
2231 in the .o file. Also, there's a hack in
2232 bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
2233 to here via the misc_info field. Therefore, we can fill in
2234 a reliable texthigh by taking the address plus size of the
2235 last function in the file. */
2237 if (pst->texthigh == 0 && last_function_name
2238 && gdbarch_sofun_address_maybe_missing (gdbarch))
2242 struct bound_minimal_symbol minsym;
2244 p = strchr (last_function_name, ':');
2246 p = last_function_name;
2247 n = p - last_function_name;
2249 strncpy (p, last_function_name, n);
2252 minsym = lookup_minimal_symbol (p, pst->filename, objfile);
2253 if (minsym.minsym == NULL)
2255 /* Sun Fortran appends an underscore to the minimal symbol name,
2256 try again with an appended underscore if the minimal symbol
2260 minsym = lookup_minimal_symbol (p, pst->filename, objfile);
2264 pst->texthigh = (BMSYMBOL_VALUE_ADDRESS (minsym)
2265 + MSYMBOL_SIZE (minsym.minsym));
2267 last_function_name = NULL;
2270 if (!gdbarch_sofun_address_maybe_missing (gdbarch))
2272 /* This test will be true if the last .o file is only data. */
2273 else if (textlow_not_set)
2274 pst->textlow = pst->texthigh;
2277 struct partial_symtab *p1;
2279 /* If we know our own starting text address, then walk through all other
2280 psymtabs for this objfile, and if any didn't know their ending text
2281 address, set it to our starting address. Take care to not set our
2282 own ending address to our starting address, nor to set addresses on
2283 `dependency' files that have both textlow and texthigh zero. */
2285 ALL_OBJFILE_PSYMTABS (objfile, p1)
2287 if (p1->texthigh == 0 && p1->textlow != 0 && p1 != pst)
2289 p1->texthigh = pst->textlow;
2290 /* If this file has only data, then make textlow match
2292 if (p1->textlow == 0)
2293 p1->textlow = p1->texthigh;
2298 /* End of kludge for patching Solaris textlow and texthigh. */
2300 pst->n_global_syms =
2301 objfile->global_psymbols.next - (objfile->global_psymbols.list
2302 + pst->globals_offset);
2303 pst->n_static_syms =
2304 objfile->static_psymbols.next - (objfile->static_psymbols.list
2305 + pst->statics_offset);
2307 pst->number_of_dependencies = number_dependencies;
2308 if (number_dependencies)
2310 pst->dependencies = (struct partial_symtab **)
2311 obstack_alloc (&objfile->objfile_obstack,
2312 number_dependencies * sizeof (struct partial_symtab *));
2313 memcpy (pst->dependencies, dependency_list,
2314 number_dependencies * sizeof (struct partial_symtab *));
2317 pst->dependencies = 0;
2319 for (i = 0; i < num_includes; i++)
2321 struct partial_symtab *subpst =
2322 allocate_psymtab (include_list[i], objfile);
2324 /* Copy the sesction_offsets array from the main psymtab. */
2325 subpst->section_offsets = pst->section_offsets;
2326 subpst->read_symtab_private =
2327 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symloc));
2331 subpst->texthigh = 0;
2333 /* We could save slight bits of space by only making one of these,
2334 shared by the entire set of include files. FIXME-someday. */
2335 subpst->dependencies = (struct partial_symtab **)
2336 obstack_alloc (&objfile->objfile_obstack,
2337 sizeof (struct partial_symtab *));
2338 subpst->dependencies[0] = pst;
2339 subpst->number_of_dependencies = 1;
2341 subpst->globals_offset =
2342 subpst->n_global_syms =
2343 subpst->statics_offset =
2344 subpst->n_static_syms = 0;
2348 subpst->read_symtab = pst->read_symtab;
2351 sort_pst_symbols (objfile, pst);
2353 if (num_includes == 0
2354 && number_dependencies == 0
2355 && pst->n_global_syms == 0
2356 && pst->n_static_syms == 0
2357 && has_line_numbers == 0)
2359 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2360 it is on the obstack, but we can forget to chain it on the list. */
2361 /* Empty psymtabs happen as a result of header files which don't have
2362 any symbols in them. There can be a lot of them. But this check
2363 is wrong, in that a psymtab with N_SLINE entries but nothing else
2364 is not empty, but we don't realize that. Fixing that without slowing
2365 things down might be tricky. */
2367 discard_psymtab (objfile, pst);
2369 /* Indicate that psymtab was thrown away. */
2370 pst = (struct partial_symtab *) NULL;
2376 dbx_psymtab_to_symtab_1 (struct objfile *objfile, struct partial_symtab *pst)
2378 struct cleanup *old_chain;
2383 fprintf_unfiltered (gdb_stderr, "Psymtab for %s already read in. "
2384 "Shouldn't happen.\n",
2389 /* Read in all partial symtabs on which this one is dependent. */
2390 for (i = 0; i < pst->number_of_dependencies; i++)
2391 if (!pst->dependencies[i]->readin)
2393 /* Inform about additional files that need to be read in. */
2396 fputs_filtered (" ", gdb_stdout);
2398 fputs_filtered ("and ", gdb_stdout);
2400 printf_filtered ("%s...", pst->dependencies[i]->filename);
2401 wrap_here (""); /* Flush output. */
2402 gdb_flush (gdb_stdout);
2404 dbx_psymtab_to_symtab_1 (objfile, pst->dependencies[i]);
2407 if (LDSYMLEN (pst)) /* Otherwise it's a dummy. */
2409 /* Init stuff necessary for reading in symbols */
2412 old_chain = make_cleanup (really_free_pendings, 0);
2413 file_string_table_offset = FILE_STRING_OFFSET (pst);
2414 symbol_size = SYMBOL_SIZE (pst);
2416 /* Read in this file's symbols. */
2417 bfd_seek (objfile->obfd, SYMBOL_OFFSET (pst), SEEK_SET);
2418 read_ofile_symtab (objfile, pst);
2420 do_cleanups (old_chain);
2426 /* Read in all of the symbols for a given psymtab for real.
2427 Be verbose about it if the user wants that. SELF is not NULL. */
2430 dbx_read_symtab (struct partial_symtab *self, struct objfile *objfile)
2436 fprintf_unfiltered (gdb_stderr, "Psymtab for %s already read in. "
2437 "Shouldn't happen.\n",
2442 if (LDSYMLEN (self) || self->number_of_dependencies)
2444 struct cleanup *back_to;
2446 /* Print the message now, before reading the string table,
2447 to avoid disconcerting pauses. */
2450 printf_filtered ("Reading in symbols for %s...", self->filename);
2451 gdb_flush (gdb_stdout);
2454 sym_bfd = objfile->obfd;
2456 next_symbol_text_func = dbx_next_symbol_text;
2458 back_to = make_cleanup (null_cleanup, NULL);
2460 if (DBX_STAB_SECTION (objfile))
2463 = symfile_relocate_debug_section (objfile,
2464 DBX_STAB_SECTION (objfile),
2468 make_cleanup (free_current_contents, (void *) &stabs_data);
2471 dbx_psymtab_to_symtab_1 (objfile, self);
2473 do_cleanups (back_to);
2475 /* Match with global symbols. This only needs to be done once,
2476 after all of the symtabs and dependencies have been read in. */
2477 scan_file_globals (objfile);
2479 /* Finish up the debug error message. */
2481 printf_filtered ("done.\n");
2485 /* Read in a defined section of a specific object file's symbols. */
2488 read_ofile_symtab (struct objfile *objfile, struct partial_symtab *pst)
2491 struct external_nlist *bufp;
2492 struct internal_nlist nlist;
2494 unsigned max_symnum;
2496 int sym_offset; /* Offset to start of symbols to read */
2497 int sym_size; /* Size of symbols to read */
2498 CORE_ADDR text_offset; /* Start of text segment for symbols */
2499 int text_size; /* Size of text segment for symbols */
2500 struct section_offsets *section_offsets;
2502 sym_offset = LDSYMOFF (pst);
2503 sym_size = LDSYMLEN (pst);
2504 text_offset = pst->textlow;
2505 text_size = pst->texthigh - pst->textlow;
2506 /* This cannot be simply objfile->section_offsets because of
2507 elfstab_offset_sections() which initializes the psymtab section
2508 offsets information in a special way, and that is different from
2509 objfile->section_offsets. */
2510 section_offsets = pst->section_offsets;
2512 dbxread_objfile = objfile;
2514 stringtab_global = DBX_STRINGTAB (objfile);
2515 set_last_source_file (NULL);
2517 abfd = objfile->obfd;
2518 symfile_bfd = objfile->obfd; /* Implicit param to next_text_symbol. */
2519 symbuf_end = symbuf_idx = 0;
2521 symbuf_left = sym_offset + sym_size;
2523 /* It is necessary to actually read one symbol *before* the start
2524 of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
2525 occurs before the N_SO symbol.
2527 Detecting this in read_dbx_symtab
2528 would slow down initial readin, so we look for it here instead. */
2529 if (!processing_acc_compilation && sym_offset >= (int) symbol_size)
2531 stabs_seek (sym_offset - symbol_size);
2533 bufp = &symbuf[symbuf_idx++];
2534 INTERNALIZE_SYMBOL (nlist, bufp, abfd);
2535 OBJSTAT (objfile, n_stabs++);
2537 namestring = set_namestring (objfile, &nlist);
2539 processing_gcc_compilation = 0;
2540 if (nlist.n_type == N_TEXT)
2542 const char *tempstring = namestring;
2544 if (strcmp (namestring, GCC_COMPILED_FLAG_SYMBOL) == 0)
2545 processing_gcc_compilation = 1;
2546 else if (strcmp (namestring, GCC2_COMPILED_FLAG_SYMBOL) == 0)
2547 processing_gcc_compilation = 2;
2548 if (tempstring[0] == bfd_get_symbol_leading_char (symfile_bfd))
2550 if (strncmp (tempstring, "__gnu_compiled", 14) == 0)
2551 processing_gcc_compilation = 2;
2556 /* The N_SO starting this symtab is the first symbol, so we
2557 better not check the symbol before it. I'm not this can
2558 happen, but it doesn't hurt to check for it. */
2559 stabs_seek (sym_offset);
2560 processing_gcc_compilation = 0;
2563 if (symbuf_idx == symbuf_end)
2565 bufp = &symbuf[symbuf_idx];
2566 if (bfd_h_get_8 (abfd, bufp->e_type) != N_SO)
2567 error (_("First symbol in segment of executable not a source symbol"));
2569 max_symnum = sym_size / symbol_size;
2572 symnum < max_symnum;
2575 QUIT; /* Allow this to be interruptable. */
2576 if (symbuf_idx == symbuf_end)
2578 bufp = &symbuf[symbuf_idx++];
2579 INTERNALIZE_SYMBOL (nlist, bufp, abfd);
2580 OBJSTAT (objfile, n_stabs++);
2582 type = bfd_h_get_8 (abfd, bufp->e_type);
2584 namestring = set_namestring (objfile, &nlist);
2588 if (sizeof (nlist.n_value) > 4
2589 /* We are a 64-bit debugger debugging a 32-bit program. */
2590 && (type == N_LSYM || type == N_PSYM))
2591 /* We have to be careful with the n_value in the case of N_LSYM
2592 and N_PSYM entries, because they are signed offsets from frame
2593 pointer, but we actually read them as unsigned 32-bit values.
2594 This is not a problem for 32-bit debuggers, for which negative
2595 values end up being interpreted correctly (as negative
2596 offsets) due to integer overflow.
2597 But we need to sign-extend the value for 64-bit debuggers,
2598 or we'll end up interpreting negative values as very large
2599 positive offsets. */
2600 nlist.n_value = (nlist.n_value ^ 0x80000000) - 0x80000000;
2601 process_one_symbol (type, nlist.n_desc, nlist.n_value,
2602 namestring, section_offsets, objfile);
2604 /* We skip checking for a new .o or -l file; that should never
2605 happen in this routine. */
2606 else if (type == N_TEXT)
2608 /* I don't think this code will ever be executed, because
2609 the GCC_COMPILED_FLAG_SYMBOL usually is right before
2610 the N_SO symbol which starts this source file.
2611 However, there is no reason not to accept
2612 the GCC_COMPILED_FLAG_SYMBOL anywhere. */
2614 if (strcmp (namestring, GCC_COMPILED_FLAG_SYMBOL) == 0)
2615 processing_gcc_compilation = 1;
2616 else if (strcmp (namestring, GCC2_COMPILED_FLAG_SYMBOL) == 0)
2617 processing_gcc_compilation = 2;
2619 else if (type & N_EXT || type == (unsigned char) N_TEXT
2620 || type == (unsigned char) N_NBTEXT)
2622 /* Global symbol: see if we came across a dbx defintion for
2623 a corresponding symbol. If so, store the value. Remove
2624 syms from the chain when their values are stored, but
2625 search the whole chain, as there may be several syms from
2626 different files with the same name. */
2627 /* This is probably not true. Since the files will be read
2628 in one at a time, each reference to a global symbol will
2629 be satisfied in each file as it appears. So we skip this
2635 /* In a Solaris elf file, this variable, which comes from the
2636 value of the N_SO symbol, will still be 0. Luckily, text_offset,
2637 which comes from pst->textlow is correct. */
2638 if (last_source_start_addr == 0)
2639 last_source_start_addr = text_offset;
2641 /* In reordered executables last_source_start_addr may not be the
2642 lower bound for this symtab, instead use text_offset which comes
2643 from pst->textlow which is correct. */
2644 if (last_source_start_addr > text_offset)
2645 last_source_start_addr = text_offset;
2647 pst->symtab = end_symtab (text_offset + text_size, objfile,
2648 SECT_OFF_TEXT (objfile));
2652 dbxread_objfile = NULL;
2656 /* Record the namespace that the function defined by SYMBOL was
2657 defined in, if necessary. BLOCK is the associated block; use
2658 OBSTACK for allocation. */
2661 cp_set_block_scope (const struct symbol *symbol,
2662 struct block *block,
2663 struct obstack *obstack)
2665 if (SYMBOL_DEMANGLED_NAME (symbol) != NULL)
2667 /* Try to figure out the appropriate namespace from the
2670 /* FIXME: carlton/2003-04-15: If the function in question is
2671 a method of a class, the name will actually include the
2672 name of the class as well. This should be harmless, but
2673 is a little unfortunate. */
2675 const char *name = SYMBOL_DEMANGLED_NAME (symbol);
2676 unsigned int prefix_len = cp_entire_prefix_len (name);
2678 block_set_scope (block,
2679 obstack_copy0 (obstack, name, prefix_len),
2684 /* This handles a single symbol from the symbol-file, building symbols
2685 into a GDB symtab. It takes these arguments and an implicit argument.
2687 TYPE is the type field of the ".stab" symbol entry.
2688 DESC is the desc field of the ".stab" entry.
2689 VALU is the value field of the ".stab" entry.
2690 NAME is the symbol name, in our address space.
2691 SECTION_OFFSETS is a set of amounts by which the sections of this
2692 object file were relocated when it was loaded into memory. Note
2693 that these section_offsets are not the objfile->section_offsets but
2694 the pst->section_offsets. All symbols that refer to memory
2695 locations need to be offset by these amounts.
2696 OBJFILE is the object file from which we are reading symbols. It
2697 is used in end_symtab. */
2700 process_one_symbol (int type, int desc, CORE_ADDR valu, char *name,
2701 const struct section_offsets *section_offsets,
2702 struct objfile *objfile)
2704 struct gdbarch *gdbarch = get_objfile_arch (objfile);
2705 struct context_stack *new;
2706 /* This remembers the address of the start of a function. It is
2707 used because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries
2708 are relative to the current function's start address. On systems
2709 other than Solaris 2, this just holds the SECT_OFF_TEXT value,
2710 and is used to relocate these symbol types rather than
2712 static CORE_ADDR function_start_offset;
2714 /* This holds the address of the start of a function, without the
2715 system peculiarities of function_start_offset. */
2716 static CORE_ADDR last_function_start;
2718 /* If this is nonzero, we've seen an N_SLINE since the start of the
2719 current function. We use this to tell us to move the first sline
2720 to the beginning of the function regardless of what its given
2722 static int sline_found_in_function = 1;
2724 /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this
2725 source file. Used to detect the SunPRO solaris compiler. */
2726 static int n_opt_found;
2728 /* The stab type used for the definition of the last function.
2729 N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */
2730 static int function_stab_type = 0;
2732 if (!block_address_function_relative)
2734 /* N_LBRAC, N_RBRAC and N_SLINE entries are not relative to the
2735 function start address, so just use the text offset. */
2736 function_start_offset =
2737 ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2740 /* Something is wrong if we see real data before seeing a source
2743 if (get_last_source_file () == NULL && type != (unsigned char) N_SO)
2745 /* Ignore any symbols which appear before an N_SO symbol.
2746 Currently no one puts symbols there, but we should deal
2747 gracefully with the case. A complain()t might be in order,
2748 but this should not be an error (). */
2757 if (*name == '\000')
2759 /* This N_FUN marks the end of a function. This closes off
2760 the current block. */
2761 struct block *block;
2763 if (context_stack_depth <= 0)
2765 lbrac_mismatch_complaint (symnum);
2769 /* The following check is added before recording line 0 at
2770 end of function so as to handle hand-generated stabs
2771 which may have an N_FUN stabs at the end of the function,
2772 but no N_SLINE stabs. */
2773 if (sline_found_in_function)
2775 CORE_ADDR addr = last_function_start + valu;
2777 record_line (current_subfile, 0,
2778 gdbarch_addr_bits_remove (gdbarch, addr));
2781 within_function = 0;
2782 new = pop_context ();
2784 /* Make a block for the local symbols within. */
2785 block = finish_block (new->name, &local_symbols, new->old_blocks,
2786 new->start_addr, new->start_addr + valu,
2789 /* For C++, set the block's scope. */
2790 if (SYMBOL_LANGUAGE (new->name) == language_cplus)
2791 cp_set_block_scope (new->name, block, &objfile->objfile_obstack);
2793 /* May be switching to an assembler file which may not be using
2794 block relative stabs, so reset the offset. */
2795 if (block_address_function_relative)
2796 function_start_offset = 0;
2801 sline_found_in_function = 0;
2803 /* Relocate for dynamic loading. */
2804 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2805 valu = gdbarch_addr_bits_remove (gdbarch, valu);
2806 last_function_start = valu;
2808 goto define_a_symbol;
2811 /* This "symbol" just indicates the start of an inner lexical
2812 context within a function. */
2814 /* Ignore extra outermost context from SunPRO cc and acc. */
2815 if (n_opt_found && desc == 1)
2818 if (block_address_function_relative)
2819 /* Relocate for Sun ELF acc fn-relative syms. */
2820 valu += function_start_offset;
2822 /* On most machines, the block addresses are relative to the
2823 N_SO, the linker did not relocate them (sigh). */
2824 valu += last_source_start_addr;
2826 push_context (desc, valu);
2830 /* This "symbol" just indicates the end of an inner lexical
2831 context that was started with N_LBRAC. */
2833 /* Ignore extra outermost context from SunPRO cc and acc. */
2834 if (n_opt_found && desc == 1)
2837 if (block_address_function_relative)
2838 /* Relocate for Sun ELF acc fn-relative syms. */
2839 valu += function_start_offset;
2841 /* On most machines, the block addresses are relative to the
2842 N_SO, the linker did not relocate them (sigh). */
2843 valu += last_source_start_addr;
2845 if (context_stack_depth <= 0)
2847 lbrac_mismatch_complaint (symnum);
2851 new = pop_context ();
2852 if (desc != new->depth)
2853 lbrac_mismatch_complaint (symnum);
2855 if (local_symbols != NULL)
2857 /* GCC development snapshots from March to December of
2858 2000 would output N_LSYM entries after N_LBRAC
2859 entries. As a consequence, these symbols are simply
2860 discarded. Complain if this is the case. */
2861 complaint (&symfile_complaints,
2862 _("misplaced N_LBRAC entry; discarding local "
2863 "symbols which have no enclosing block"));
2865 local_symbols = new->locals;
2867 if (context_stack_depth > 1)
2869 /* This is not the outermost LBRAC...RBRAC pair in the
2870 function, its local symbols preceded it, and are the ones
2871 just recovered from the context stack. Define the block
2872 for them (but don't bother if the block contains no
2873 symbols. Should we complain on blocks without symbols?
2874 I can't think of any useful purpose for them). */
2875 if (local_symbols != NULL)
2877 /* Muzzle a compiler bug that makes end < start.
2879 ??? Which compilers? Is this ever harmful?. */
2880 if (new->start_addr > valu)
2882 complaint (&symfile_complaints,
2883 _("block start larger than block end"));
2884 new->start_addr = valu;
2886 /* Make a block for the local symbols within. */
2887 finish_block (0, &local_symbols, new->old_blocks,
2888 new->start_addr, valu, objfile);
2893 /* This is the outermost LBRAC...RBRAC pair. There is no
2894 need to do anything; leave the symbols that preceded it
2895 to be attached to the function's own block. We need to
2896 indicate that we just moved outside of the function. */
2897 within_function = 0;
2904 /* This kind of symbol indicates the start of an object file.
2905 Relocate for dynamic loading. */
2906 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2910 /* This type of symbol indicates the start of data for one
2911 source file. Finish the symbol table of the previous source
2912 file (if any) and start accumulating a new symbol table.
2913 Relocate for dynamic loading. */
2914 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2918 if (get_last_source_file ())
2920 /* Check if previous symbol was also an N_SO (with some
2921 sanity checks). If so, that one was actually the
2922 directory name, and the current one is the real file
2923 name. Patch things up. */
2924 if (previous_stab_code == (unsigned char) N_SO)
2926 patch_subfile_names (current_subfile, name);
2927 break; /* Ignore repeated SOs. */
2929 end_symtab (valu, objfile, SECT_OFF_TEXT (objfile));
2933 /* Null name means this just marks the end of text for this .o
2934 file. Don't start a new symtab in this case. */
2935 if (*name == '\000')
2938 if (block_address_function_relative)
2939 function_start_offset = 0;
2942 start_symtab (name, NULL, valu);
2943 record_debugformat ("stabs");
2947 /* This type of symbol indicates the start of data for a
2948 sub-source-file, one whose contents were copied or included
2949 in the compilation of the main source file (whose name was
2950 given in the N_SO symbol). Relocate for dynamic loading. */
2951 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2952 start_subfile (name, current_subfile->dirname);
2957 add_new_header_file (name, valu);
2958 start_subfile (name, current_subfile->dirname);
2962 start_subfile (pop_subfile (), current_subfile->dirname);
2966 add_old_header_file (name, valu);
2970 /* This type of "symbol" really just records one line-number --
2971 core-address correspondence. Enter it in the line list for
2972 this symbol table. */
2974 /* Relocate for dynamic loading and for ELF acc
2975 function-relative symbols. */
2976 valu += function_start_offset;
2978 /* GCC 2.95.3 emits the first N_SLINE stab somwehere in the
2979 middle of the prologue instead of right at the start of the
2980 function. To deal with this we record the address for the
2981 first N_SLINE stab to be the start of the function instead of
2982 the listed location. We really shouldn't to this. When
2983 compiling with optimization, this first N_SLINE stab might be
2984 optimized away. Other (non-GCC) compilers don't emit this
2985 stab at all. There is no real harm in having an extra
2986 numbered line, although it can be a bit annoying for the
2987 user. However, it totally screws up our testsuite.
2989 So for now, keep adjusting the address of the first N_SLINE
2990 stab, but only for code compiled with GCC. */
2992 if (within_function && sline_found_in_function == 0)
2994 CORE_ADDR addr = processing_gcc_compilation == 2 ?
2995 last_function_start : valu;
2997 record_line (current_subfile, desc,
2998 gdbarch_addr_bits_remove (gdbarch, addr));
2999 sline_found_in_function = 1;
3002 record_line (current_subfile, desc,
3003 gdbarch_addr_bits_remove (gdbarch, valu));
3007 common_block_start (name, objfile);
3011 common_block_end (objfile);
3014 /* The following symbol types need to have the appropriate
3015 offset added to their value; then we process symbol
3016 definitions in the name. */
3018 case N_STSYM: /* Static symbol in data segment. */
3019 case N_LCSYM: /* Static symbol in BSS segment. */
3020 case N_ROSYM: /* Static symbol in read-only data segment. */
3021 /* HORRID HACK DEPT. However, it's Sun's furgin' fault.
3022 Solaris 2's stabs-in-elf makes *most* symbols relative but
3023 leaves a few absolute (at least for Solaris 2.1 and version
3024 2.0.1 of the SunPRO compiler). N_STSYM and friends sit on
3025 the fence. .stab "foo:S...",N_STSYM is absolute (ld
3026 relocates it) .stab "foo:V...",N_STSYM is relative (section
3027 base subtracted). This leaves us no choice but to search for
3028 the 'S' or 'V'... (or pass the whole section_offsets stuff
3029 down ONE MORE function call level, which we really don't want
3034 /* Normal object file and NLMs have non-zero text seg offsets,
3035 but don't need their static syms offset in this fashion.
3036 XXX - This is really a crock that should be fixed in the
3037 solib handling code so that I don't have to work around it
3040 if (!symfile_relocatable)
3042 p = strchr (name, ':');
3043 if (p != 0 && p[1] == 'S')
3045 /* The linker relocated it. We don't want to add an
3046 elfstab_offset_sections-type offset, but we *do*
3047 want to add whatever solib.c passed to
3048 symbol_file_add as addr (this is known to affect
3049 SunOS 4, and I suspect ELF too). Since
3050 elfstab_offset_sections currently does not muck
3051 with the text offset (there is no Ttext.text
3052 symbol), we can get addr from the text offset. If
3053 elfstab_offset_sections ever starts dealing with
3054 the text offset, and we still need to do this, we
3055 need to invent a SECT_OFF_ADDR_KLUDGE or something. */
3056 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
3057 goto define_a_symbol;
3060 /* Since it's not the kludge case, re-dispatch to the right
3071 internal_error (__FILE__, __LINE__,
3072 _("failed internal consistency check"));
3076 case_N_STSYM: /* Static symbol in data segment. */
3077 case N_DSLINE: /* Source line number, data segment. */
3078 valu += ANOFFSET (section_offsets, SECT_OFF_DATA (objfile));
3079 goto define_a_symbol;
3081 case_N_LCSYM: /* Static symbol in BSS segment. */
3082 case N_BSLINE: /* Source line number, BSS segment. */
3083 /* N_BROWS: overlaps with N_BSLINE. */
3084 valu += ANOFFSET (section_offsets, SECT_OFF_BSS (objfile));
3085 goto define_a_symbol;
3087 case_N_ROSYM: /* Static symbol in read-only data segment. */
3088 valu += ANOFFSET (section_offsets, SECT_OFF_RODATA (objfile));
3089 goto define_a_symbol;
3091 case N_ENTRY: /* Alternate entry point. */
3092 /* Relocate for dynamic loading. */
3093 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
3094 goto define_a_symbol;
3096 /* The following symbol types we don't know how to process.
3097 Handle them in a "default" way, but complain to people who
3100 case N_CATCH: /* Exception handler catcher. */
3101 case N_EHDECL: /* Exception handler name. */
3102 case N_PC: /* Global symbol in Pascal. */
3103 case N_M2C: /* Modula-2 compilation unit. */
3104 /* N_MOD2: overlaps with N_EHDECL. */
3105 case N_SCOPE: /* Modula-2 scope information. */
3106 case N_ECOML: /* End common (local name). */
3107 case N_NBTEXT: /* Gould Non-Base-Register symbols??? */
3112 unknown_symtype_complaint (hex_string (type));
3115 /* The following symbol types don't need the address field
3116 relocated, since it is either unused, or is absolute. */
3118 case N_GSYM: /* Global variable. */
3119 case N_NSYMS: /* Number of symbols (Ultrix). */
3120 case N_NOMAP: /* No map? (Ultrix). */
3121 case N_RSYM: /* Register variable. */
3122 case N_DEFD: /* Modula-2 GNU module dependency. */
3123 case N_SSYM: /* Struct or union element. */
3124 case N_LSYM: /* Local symbol in stack. */
3125 case N_PSYM: /* Parameter variable. */
3126 case N_LENG: /* Length of preceding symbol type. */
3130 char *colon_pos = strchr (name, ':');
3132 if (colon_pos == NULL)
3135 deftype = colon_pos[1];
3141 function_stab_type = type;
3143 /* Deal with the SunPRO 3.0 compiler which omits the
3144 address from N_FUN symbols. */
3146 && valu == ANOFFSET (section_offsets,
3147 SECT_OFF_TEXT (objfile))
3148 && gdbarch_sofun_address_maybe_missing (gdbarch))
3150 CORE_ADDR minsym_valu =
3151 find_stab_function_addr (name, get_last_source_file (),
3154 /* The function find_stab_function_addr will return
3155 0 if the minimal symbol wasn't found.
3156 (Unfortunately, this might also be a valid
3157 address.) Anyway, if it *does* return 0, it is
3158 likely that the value was set correctly to begin
3160 if (minsym_valu != 0)
3164 if (block_address_function_relative)
3165 /* For Solaris 2 compilers, the block addresses and
3166 N_SLINE's are relative to the start of the
3167 function. On normal systems, and when using GCC on
3168 Solaris 2, these addresses are just absolute, or
3169 relative to the N_SO, depending on
3170 BLOCK_ADDRESS_ABSOLUTE. */
3171 function_start_offset = valu;
3173 within_function = 1;
3175 if (context_stack_depth > 1)
3177 complaint (&symfile_complaints,
3178 _("unmatched N_LBRAC before symtab pos %d"),
3183 if (context_stack_depth > 0)
3185 struct block *block;
3187 new = pop_context ();
3188 /* Make a block for the local symbols within. */
3189 block = finish_block (new->name, &local_symbols,
3190 new->old_blocks, new->start_addr,
3193 /* For C++, set the block's scope. */
3194 if (SYMBOL_LANGUAGE (new->name) == language_cplus)
3195 cp_set_block_scope (new->name, block,
3196 &objfile->objfile_obstack);
3199 new = push_context (0, valu);
3200 new->name = define_symbol (valu, name, desc, type, objfile);
3204 define_symbol (valu, name, desc, type, objfile);
3210 /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it
3211 for a bunch of other flags, too. Someday we may parse their
3212 flags; for now we ignore theirs and hope they'll ignore ours. */
3213 case N_OPT: /* Solaris 2: Compiler options. */
3216 if (strcmp (name, GCC2_COMPILED_FLAG_SYMBOL) == 0)
3218 processing_gcc_compilation = 2;
3225 case N_MAIN: /* Name of main routine. */
3226 /* FIXME: If one has a symbol file with N_MAIN and then replaces
3227 it with a symbol file with "main" and without N_MAIN. I'm
3228 not sure exactly what rule to follow but probably something
3229 like: N_MAIN takes precedence over "main" no matter what
3230 objfile it is in; If there is more than one N_MAIN, choose
3231 the one in the symfile_objfile; If there is more than one
3232 N_MAIN within a given objfile, complain() and choose
3233 arbitrarily. (kingdon) */
3235 set_objfile_main_name (objfile, name, language_unknown);
3238 /* The following symbol types can be ignored. */
3239 case N_OBJ: /* Solaris 2: Object file dir and name. */
3240 case N_PATCH: /* Solaris 2: Patch Run Time Checker. */
3241 /* N_UNDF: Solaris 2: File separator mark. */
3242 /* N_UNDF: -- we will never encounter it, since we only process
3243 one file's symbols at once. */
3244 case N_ENDM: /* Solaris 2: End of module. */
3245 case N_ALIAS: /* SunPro F77: alias name, ignore for now. */
3249 /* '#' is a GNU C extension to allow one symbol to refer to another
3252 Generally this is used so that an alias can refer to its main
3257 /* Initialize symbol reference names and determine if this is a
3258 definition. If a symbol reference is being defined, go ahead
3259 and add it. Otherwise, just return. */
3264 /* If this stab defines a new reference ID that is not on the
3265 reference list, then put it on the reference list.
3267 We go ahead and advance NAME past the reference, even though
3268 it is not strictly necessary at this time. */
3269 refnum = symbol_reference_defined (&s);
3271 if (!ref_search (refnum))
3272 ref_add (refnum, 0, name, valu);
3276 previous_stab_code = type;
3279 /* FIXME: The only difference between this and elfstab_build_psymtabs
3280 is the call to install_minimal_symbols for elf, and the support for
3281 split sections. If the differences are really that small, the code
3282 should be shared. */
3284 /* Scan and build partial symbols for an coff symbol file.
3285 The coff file has already been processed to get its minimal symbols.
3287 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3290 OBJFILE is the object file we are reading symbols from.
3291 ADDR is the address relative to which the symbols are (e.g.
3292 the base address of the text segment).
3293 TEXTADDR is the address of the text section.
3294 TEXTSIZE is the size of the text section.
3295 STABSECTS is the list of .stab sections in OBJFILE.
3296 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3297 .stabstr section exists.
3299 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3300 adjusted for coff details. */
3303 coffstab_build_psymtabs (struct objfile *objfile,
3304 CORE_ADDR textaddr, unsigned int textsize,
3305 struct stab_section_list *stabsects,
3306 file_ptr stabstroffset, unsigned int stabstrsize)
3309 bfd *sym_bfd = objfile->obfd;
3310 char *name = bfd_get_filename (sym_bfd);
3311 struct dbx_symfile_info *info;
3312 unsigned int stabsize;
3314 /* There is already a dbx_symfile_info allocated by our caller.
3315 It might even contain some info from the coff symtab to help us. */
3316 info = DBX_SYMFILE_INFO (objfile);
3318 DBX_TEXT_ADDR (objfile) = textaddr;
3319 DBX_TEXT_SIZE (objfile) = textsize;
3321 #define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3322 DBX_SYMBOL_SIZE (objfile) = COFF_STABS_SYMBOL_SIZE;
3323 DBX_STRINGTAB_SIZE (objfile) = stabstrsize;
3325 if (stabstrsize > bfd_get_size (sym_bfd))
3326 error (_("ridiculous string table size: %d bytes"), stabstrsize);
3327 DBX_STRINGTAB (objfile) = (char *)
3328 obstack_alloc (&objfile->objfile_obstack, stabstrsize + 1);
3329 OBJSTAT (objfile, sz_strtab += stabstrsize + 1);
3331 /* Now read in the string table in one big gulp. */
3333 val = bfd_seek (sym_bfd, stabstroffset, SEEK_SET);
3335 perror_with_name (name);
3336 val = bfd_bread (DBX_STRINGTAB (objfile), stabstrsize, sym_bfd);
3337 if (val != stabstrsize)
3338 perror_with_name (name);
3340 stabsread_new_init ();
3341 buildsym_new_init ();
3342 free_header_files ();
3343 init_header_files ();
3345 processing_acc_compilation = 1;
3347 /* In a coff file, we've already installed the minimal symbols that came
3348 from the coff (non-stab) symbol table, so always act like an
3349 incremental load here. */
3350 if (stabsects->next == NULL)
3352 stabsize = bfd_section_size (sym_bfd, stabsects->section);
3353 DBX_SYMCOUNT (objfile) = stabsize / DBX_SYMBOL_SIZE (objfile);
3354 DBX_SYMTAB_OFFSET (objfile) = stabsects->section->filepos;
3358 struct stab_section_list *stabsect;
3360 DBX_SYMCOUNT (objfile) = 0;
3361 for (stabsect = stabsects; stabsect != NULL; stabsect = stabsect->next)
3363 stabsize = bfd_section_size (sym_bfd, stabsect->section);
3364 DBX_SYMCOUNT (objfile) += stabsize / DBX_SYMBOL_SIZE (objfile);
3367 DBX_SYMTAB_OFFSET (objfile) = stabsects->section->filepos;
3369 symbuf_sections = stabsects->next;
3370 symbuf_left = bfd_section_size (sym_bfd, stabsects->section);
3374 dbx_symfile_read (objfile, 0);
3377 /* Scan and build partial symbols for an ELF symbol file.
3378 This ELF file has already been processed to get its minimal symbols.
3380 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3383 OBJFILE is the object file we are reading symbols from.
3384 ADDR is the address relative to which the symbols are (e.g.
3385 the base address of the text segment).
3386 STABSECT is the BFD section information for the .stab section.
3387 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3388 .stabstr section exists.
3390 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3391 adjusted for elf details. */
3394 elfstab_build_psymtabs (struct objfile *objfile, asection *stabsect,
3395 file_ptr stabstroffset, unsigned int stabstrsize)
3398 bfd *sym_bfd = objfile->obfd;
3399 char *name = bfd_get_filename (sym_bfd);
3400 struct dbx_symfile_info *info;
3401 struct cleanup *back_to = make_cleanup (null_cleanup, NULL);
3403 /* There is already a dbx_symfile_info allocated by our caller.
3404 It might even contain some info from the ELF symtab to help us. */
3405 info = DBX_SYMFILE_INFO (objfile);
3407 /* Find the first and last text address. dbx_symfile_read seems to
3409 find_text_range (sym_bfd, objfile);
3411 #define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3412 DBX_SYMBOL_SIZE (objfile) = ELF_STABS_SYMBOL_SIZE;
3413 DBX_SYMCOUNT (objfile)
3414 = bfd_section_size (objfile->obfd, stabsect) / DBX_SYMBOL_SIZE (objfile);
3415 DBX_STRINGTAB_SIZE (objfile) = stabstrsize;
3416 DBX_SYMTAB_OFFSET (objfile) = stabsect->filepos;
3417 DBX_STAB_SECTION (objfile) = stabsect;
3419 if (stabstrsize > bfd_get_size (sym_bfd))
3420 error (_("ridiculous string table size: %d bytes"), stabstrsize);
3421 DBX_STRINGTAB (objfile) = (char *)
3422 obstack_alloc (&objfile->objfile_obstack, stabstrsize + 1);
3423 OBJSTAT (objfile, sz_strtab += stabstrsize + 1);
3425 /* Now read in the string table in one big gulp. */
3427 val = bfd_seek (sym_bfd, stabstroffset, SEEK_SET);
3429 perror_with_name (name);
3430 val = bfd_bread (DBX_STRINGTAB (objfile), stabstrsize, sym_bfd);
3431 if (val != stabstrsize)
3432 perror_with_name (name);
3434 stabsread_new_init ();
3435 buildsym_new_init ();
3436 free_header_files ();
3437 init_header_files ();
3439 processing_acc_compilation = 1;
3442 symbuf_left = bfd_section_size (objfile->obfd, stabsect);
3443 stabs_data = symfile_relocate_debug_section (objfile, stabsect, NULL);
3445 make_cleanup (free_current_contents, (void *) &stabs_data);
3447 /* In an elf file, we've already installed the minimal symbols that came
3448 from the elf (non-stab) symbol table, so always act like an
3449 incremental load here. dbx_symfile_read should not generate any new
3450 minimal symbols, since we will have already read the ELF dynamic symbol
3451 table and normal symbol entries won't be in the ".stab" section; but in
3452 case it does, it will install them itself. */
3453 dbx_symfile_read (objfile, 0);
3455 do_cleanups (back_to);
3458 /* Scan and build partial symbols for a file with special sections for stabs
3459 and stabstrings. The file has already been processed to get its minimal
3460 symbols, and any other symbols that might be necessary to resolve GSYMs.
3462 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3465 OBJFILE is the object file we are reading symbols from.
3466 ADDR is the address relative to which the symbols are (e.g. the base address
3467 of the text segment).
3468 STAB_NAME is the name of the section that contains the stabs.
3469 STABSTR_NAME is the name of the section that contains the stab strings.
3471 This routine is mostly copied from dbx_symfile_init and
3472 dbx_symfile_read. */
3475 stabsect_build_psymtabs (struct objfile *objfile, char *stab_name,
3476 char *stabstr_name, char *text_name)
3479 bfd *sym_bfd = objfile->obfd;
3480 char *name = bfd_get_filename (sym_bfd);
3482 asection *stabstrsect;
3483 asection *text_sect;
3484 struct dbx_symfile_info *dbx;
3486 stabsect = bfd_get_section_by_name (sym_bfd, stab_name);
3487 stabstrsect = bfd_get_section_by_name (sym_bfd, stabstr_name);
3493 error (_("stabsect_build_psymtabs: Found stabs (%s), "
3494 "but not string section (%s)"),
3495 stab_name, stabstr_name);
3497 dbx = XCNEW (struct dbx_symfile_info);
3498 set_objfile_data (objfile, dbx_objfile_data_key, dbx);
3500 text_sect = bfd_get_section_by_name (sym_bfd, text_name);
3502 error (_("Can't find %s section in symbol file"), text_name);
3503 DBX_TEXT_ADDR (objfile) = bfd_section_vma (sym_bfd, text_sect);
3504 DBX_TEXT_SIZE (objfile) = bfd_section_size (sym_bfd, text_sect);
3506 DBX_SYMBOL_SIZE (objfile) = sizeof (struct external_nlist);
3507 DBX_SYMCOUNT (objfile) = bfd_section_size (sym_bfd, stabsect)
3508 / DBX_SYMBOL_SIZE (objfile);
3509 DBX_STRINGTAB_SIZE (objfile) = bfd_section_size (sym_bfd, stabstrsect);
3510 DBX_SYMTAB_OFFSET (objfile) = stabsect->filepos; /* XXX - FIXME: POKING
3514 if (DBX_STRINGTAB_SIZE (objfile) > bfd_get_size (sym_bfd))
3515 error (_("ridiculous string table size: %d bytes"),
3516 DBX_STRINGTAB_SIZE (objfile));
3517 DBX_STRINGTAB (objfile) = (char *)
3518 obstack_alloc (&objfile->objfile_obstack,
3519 DBX_STRINGTAB_SIZE (objfile) + 1);
3520 OBJSTAT (objfile, sz_strtab += DBX_STRINGTAB_SIZE (objfile) + 1);
3522 /* Now read in the string table in one big gulp. */
3524 val = bfd_get_section_contents (sym_bfd, /* bfd */
3525 stabstrsect, /* bfd section */
3526 DBX_STRINGTAB (objfile), /* input buffer */
3527 0, /* offset into section */
3528 DBX_STRINGTAB_SIZE (objfile)); /* amount to
3532 perror_with_name (name);
3534 stabsread_new_init ();
3535 buildsym_new_init ();
3536 free_header_files ();
3537 init_header_files ();
3539 /* Now, do an incremental load. */
3541 processing_acc_compilation = 1;
3542 dbx_symfile_read (objfile, 0);
3545 static const struct sym_fns aout_sym_fns =
3547 dbx_new_init, /* init anything gbl to entire symtab */
3548 dbx_symfile_init, /* read initial info, setup for sym_read() */
3549 dbx_symfile_read, /* read a symbol file into symtab */
3550 NULL, /* sym_read_psymbols */
3551 dbx_symfile_finish, /* finished with file, cleanup */
3552 default_symfile_offsets, /* parse user's offsets to internal form */
3553 default_symfile_segments, /* Get segment information from a file. */
3555 default_symfile_relocate, /* Relocate a debug section. */
3556 NULL, /* sym_probe_fns */
3561 _initialize_dbxread (void)
3563 add_symtab_fns (bfd_target_aout_flavour, &aout_sym_fns);
3565 dbx_objfile_data_key
3566 = register_objfile_data_with_cleanup (NULL, dbx_free_symfile_info);