1 /* Read dbx symbol tables and convert to internal format, for GDB.
2 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
3 1996, 1997, 1998, 1999, 2000, 2001
4 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
23 /* This module provides three functions: dbx_symfile_init,
24 which initializes to read a symbol file; dbx_new_init, which
25 discards existing cached information when all symbols are being
26 discarded; and dbx_symfile_read, which reads a symbol table
29 dbx_symfile_read only does the minimum work necessary for letting the
30 user "name" things symbolically; it does not read the entire symtab.
31 Instead, it reads the external and static symbols and puts them in partial
32 symbol tables. When more extensive information is requested of a
33 file, the corresponding partial symbol table is mutated into a full
34 fledged symbol table by going back and reading the symbols
35 for real. dbx_psymtab_to_symtab() is the function that does this */
38 #include "gdb_string.h"
40 #if defined(USG) || defined(__CYGNUSCLIB__)
41 #include <sys/types.h>
48 #include "breakpoint.h"
50 #include "gdbcore.h" /* for bfd stuff */
51 #include "libaout.h" /* FIXME Secret internal BFD stuff for a.out */
55 #include "stabsread.h"
56 #include "gdb-stabs.h"
58 #include "language.h" /* Needed inside partial-stab.h */
59 #include "complaints.h"
62 #include "aout/aout64.h"
63 #include "aout/stab_gnu.h" /* We always use GNU stabs, not native, now */
66 /* This macro returns the size field of a minimal symbol, which is normally
67 stored in the "info" field. The macro can be overridden for specific
68 targets (e.g. MIPS16) that use the info field for other purposes. */
70 #define MSYMBOL_SIZE(msym) ((long) MSYMBOL_INFO (msym))
74 /* We put a pointer to this structure in the read_symtab_private field
79 /* The start (inclusive) and end (exclusive) addresses for this
80 partial symtab's text. STABS doesn't reliably give us nice
81 start and end addresses for each function. Instead, we are
82 told the addresses of various boundary points, and we have to
83 gather those together to build ranges. These are our running
84 best guess as to the range of text addresses for this psymtab. */
85 CORE_ADDR textlow, texthigh;
87 /* Offset within the file symbol table of first local symbol for this
92 /* Length (in bytes) of the section of the symbol table devoted to
93 this file's symbols (actually, the section bracketed may contain
94 more than just this file's symbols). If ldsymlen is 0, the only
95 reason for this thing's existence is the dependency list. Nothing
96 else will happen when it is read in. */
100 /* The size of each symbol in the symbol file (in external form). */
104 /* Further information needed to locate the symbols if they are in
109 int file_string_offset;
112 #define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff)
113 #define LDSYMLEN(p) (((struct symloc *)((p)->read_symtab_private))->ldsymlen)
114 #define SYMLOC(p) ((struct symloc *)((p)->read_symtab_private))
115 #define TEXTLOW(p) (SYMLOC(p)->textlow)
116 #define TEXTHIGH(p) (SYMLOC(p)->texthigh)
117 #define SYMBOL_SIZE(p) (SYMLOC(p)->symbol_size)
118 #define SYMBOL_OFFSET(p) (SYMLOC(p)->symbol_offset)
119 #define STRING_OFFSET(p) (SYMLOC(p)->string_offset)
120 #define FILE_STRING_OFFSET(p) (SYMLOC(p)->file_string_offset)
123 /* Remember what we deduced to be the source language of this psymtab. */
125 static enum language psymtab_language = language_unknown;
127 /* The BFD for this file -- implicit parameter to next_symbol_text. */
129 static bfd *symfile_bfd;
131 /* The size of each symbol in the symbol file (in external form).
132 This is set by dbx_symfile_read when building psymtabs, and by
133 dbx_psymtab_to_symtab when building symtabs. */
135 static unsigned symbol_size;
137 /* This is the offset of the symbol table in the executable file. */
139 static unsigned symbol_table_offset;
141 /* This is the offset of the string table in the executable file. */
143 static unsigned string_table_offset;
145 /* For elf+stab executables, the n_strx field is not a simple index
146 into the string table. Instead, each .o file has a base offset in
147 the string table, and the associated symbols contain offsets from
148 this base. The following two variables contain the base offset for
149 the current and next .o files. */
151 static unsigned int file_string_table_offset;
152 static unsigned int next_file_string_table_offset;
154 /* .o and NLM files contain unrelocated addresses which are based at
155 0. When non-zero, this flag disables some of the special cases for
156 Solaris elf+stab text addresses at location 0. */
158 static int symfile_relocatable = 0;
160 /* If this is nonzero, N_LBRAC, N_RBRAC, and N_SLINE entries are
161 relative to the function start address. */
163 static int block_address_function_relative = 0;
165 /* The lowest text address we have yet encountered. This is needed
166 because in an a.out file, there is no header field which tells us
167 what address the program is actually going to be loaded at, so we
168 need to make guesses based on the symbols (which *are* relocated to
169 reflect the address it will be loaded at). */
171 static CORE_ADDR lowest_text_address;
173 /* Non-zero if there is any line number info in the objfile. Prevents
174 end_psymtab from discarding an otherwise empty psymtab. */
176 static int has_line_numbers;
178 /* Complaints about the symbols we have encountered. */
180 struct complaint lbrac_complaint =
181 {"bad block start address patched", 0, 0};
183 struct complaint string_table_offset_complaint =
184 {"bad string table offset in symbol %d", 0, 0};
186 struct complaint unknown_symtype_complaint =
187 {"unknown symbol type %s", 0, 0};
189 struct complaint unknown_symchar_complaint =
190 {"unknown symbol descriptor `%c'", 0, 0};
192 struct complaint lbrac_rbrac_complaint =
193 {"block start larger than block end", 0, 0};
195 struct complaint lbrac_unmatched_complaint =
196 {"unmatched N_LBRAC before symtab pos %d", 0, 0};
198 struct complaint lbrac_mismatch_complaint =
199 {"N_LBRAC/N_RBRAC symbol mismatch at symtab pos %d", 0, 0};
201 struct complaint repeated_header_complaint =
202 {"\"repeated\" header file %s not previously seen, at symtab pos %d", 0, 0};
204 struct complaint unclaimed_bincl_complaint =
205 {"N_BINCL %s not in entries for any file, at symtab pos %d", 0, 0};
207 /* find_text_range --- find start and end of loadable code sections
209 The find_text_range function finds the shortest address range that
210 encloses all sections containing executable code, and stores it in
211 objfile's text_addr and text_size members.
213 dbx_symfile_read will use this to finish off the partial symbol
214 table, in some cases. */
217 find_text_range (bfd * sym_bfd, struct objfile *objfile)
224 for (sec = sym_bfd->sections; sec; sec = sec->next)
225 if (bfd_get_section_flags (sym_bfd, sec) & SEC_CODE)
227 CORE_ADDR sec_start = bfd_section_vma (sym_bfd, sec);
228 CORE_ADDR sec_end = sec_start + bfd_section_size (sym_bfd, sec);
232 if (sec_start < start)
247 error ("Can't find any code sections in symbol file");
249 DBX_TEXT_ADDR (objfile) = start;
250 DBX_TEXT_SIZE (objfile) = end - start;
255 /* During initial symbol readin, we need to have a structure to keep
256 track of which psymtabs have which bincls in them. This structure
257 is used during readin to setup the list of dependencies within each
258 partial symbol table. */
260 struct header_file_location
262 char *name; /* Name of header file */
263 int instance; /* See above */
264 struct partial_symtab *pst; /* Partial symtab that has the
265 BINCL/EINCL defs for this file */
268 /* The actual list and controling variables */
269 static struct header_file_location *bincl_list, *next_bincl;
270 static int bincls_allocated;
272 /* Local function prototypes */
274 extern void _initialize_dbxread (void);
276 static void process_now (struct objfile *);
278 static void read_ofile_symtab (struct partial_symtab *);
280 static void dbx_psymtab_to_symtab (struct partial_symtab *);
282 static void dbx_psymtab_to_symtab_1 (struct partial_symtab *);
284 static void read_dbx_dynamic_symtab (struct objfile *objfile);
286 static void read_dbx_symtab (struct objfile *);
288 static void free_bincl_list (struct objfile *);
290 static struct partial_symtab *find_corresponding_bincl_psymtab (char *, int);
292 static void add_bincl_to_list (struct partial_symtab *, char *, int);
294 static void init_bincl_list (int, struct objfile *);
296 static char *dbx_next_symbol_text (struct objfile *);
298 static void fill_symbuf (bfd *);
300 static void dbx_symfile_init (struct objfile *);
302 static void dbx_new_init (struct objfile *);
304 static void dbx_symfile_read (struct objfile *, int);
306 static void dbx_symfile_finish (struct objfile *);
308 static void record_minimal_symbol (char *, CORE_ADDR, int, struct objfile *);
310 static void add_new_header_file (char *, int);
312 static void add_old_header_file (char *, int);
314 static void add_this_object_header_file (int);
316 static struct partial_symtab *start_psymtab (struct objfile *, char *,
318 struct partial_symbol **,
319 struct partial_symbol **);
321 /* Free up old header file tables */
324 free_header_files (void)
326 if (this_object_header_files)
328 xfree (this_object_header_files);
329 this_object_header_files = NULL;
331 n_allocated_this_object_header_files = 0;
334 /* Allocate new header file tables */
337 init_header_files (void)
339 n_allocated_this_object_header_files = 10;
340 this_object_header_files = (int *) xmalloc (10 * sizeof (int));
343 /* Add header file number I for this object file
344 at the next successive FILENUM. */
347 add_this_object_header_file (int i)
349 if (n_this_object_header_files == n_allocated_this_object_header_files)
351 n_allocated_this_object_header_files *= 2;
352 this_object_header_files
353 = (int *) xrealloc ((char *) this_object_header_files,
354 n_allocated_this_object_header_files * sizeof (int));
357 this_object_header_files[n_this_object_header_files++] = i;
360 /* Add to this file an "old" header file, one already seen in
361 a previous object file. NAME is the header file's name.
362 INSTANCE is its instance code, to select among multiple
363 symbol tables for the same header file. */
366 add_old_header_file (char *name, int instance)
368 register struct header_file *p = HEADER_FILES (current_objfile);
371 for (i = 0; i < N_HEADER_FILES (current_objfile); i++)
372 if (STREQ (p[i].name, name) && instance == p[i].instance)
374 add_this_object_header_file (i);
377 complain (&repeated_header_complaint, name, symnum);
380 /* Add to this file a "new" header file: definitions for its types follow.
381 NAME is the header file's name.
382 Most often this happens only once for each distinct header file,
383 but not necessarily. If it happens more than once, INSTANCE has
384 a different value each time, and references to the header file
385 use INSTANCE values to select among them.
387 dbx output contains "begin" and "end" markers for each new header file,
388 but at this level we just need to know which files there have been;
389 so we record the file when its "begin" is seen and ignore the "end". */
392 add_new_header_file (char *name, int instance)
395 register struct header_file *hfile;
397 /* Make sure there is room for one more header file. */
399 i = N_ALLOCATED_HEADER_FILES (current_objfile);
401 if (N_HEADER_FILES (current_objfile) == i)
405 N_ALLOCATED_HEADER_FILES (current_objfile) = 10;
406 HEADER_FILES (current_objfile) = (struct header_file *)
407 xmalloc (10 * sizeof (struct header_file));
412 N_ALLOCATED_HEADER_FILES (current_objfile) = i;
413 HEADER_FILES (current_objfile) = (struct header_file *)
414 xrealloc ((char *) HEADER_FILES (current_objfile),
415 (i * sizeof (struct header_file)));
419 /* Create an entry for this header file. */
421 i = N_HEADER_FILES (current_objfile)++;
422 hfile = HEADER_FILES (current_objfile) + i;
423 hfile->name = savestring (name, strlen (name));
424 hfile->instance = instance;
427 = (struct type **) xmalloc (10 * sizeof (struct type *));
428 memset (hfile->vector, 0, 10 * sizeof (struct type *));
430 add_this_object_header_file (i);
434 static struct type **
435 explicit_lookup_type (int real_filenum, int index)
437 register struct header_file *f = &HEADER_FILES (current_objfile)[real_filenum];
439 if (index >= f->length)
442 f->vector = (struct type **)
443 xrealloc (f->vector, f->length * sizeof (struct type *));
444 memset (&f->vector[f->length / 2],
445 '\0', f->length * sizeof (struct type *) / 2);
447 return &f->vector[index];
452 record_minimal_symbol (char *name, CORE_ADDR address, int type,
453 struct objfile *objfile)
455 enum minimal_symbol_type ms_type;
457 asection *bfd_section;
463 section = SECT_OFF_TEXT (objfile);
464 bfd_section = DBX_TEXT_SECTION (objfile);
468 section = SECT_OFF_DATA (objfile);
469 bfd_section = DBX_DATA_SECTION (objfile);
473 section = SECT_OFF_BSS (objfile);
474 bfd_section = DBX_BSS_SECTION (objfile);
484 section = SECT_OFF_DATA (objfile);
485 bfd_section = DBX_DATA_SECTION (objfile);
488 /* I don't think this type actually exists; since a N_SETV is the result
489 of going over many .o files, it doesn't make sense to have one
491 ms_type = mst_file_data;
492 section = SECT_OFF_DATA (objfile);
493 bfd_section = DBX_DATA_SECTION (objfile);
500 ms_type = mst_file_text;
501 section = SECT_OFF_TEXT (objfile);
502 bfd_section = DBX_TEXT_SECTION (objfile);
505 ms_type = mst_file_data;
507 /* Check for __DYNAMIC, which is used by Sun shared libraries.
508 Record it as global even if it's local, not global, so
509 lookup_minimal_symbol can find it. We don't check symbol_leading_char
510 because for SunOS4 it always is '_'. */
511 if (name[8] == 'C' && STREQ ("__DYNAMIC", name))
514 /* Same with virtual function tables, both global and static. */
516 char *tempstring = name;
517 if (tempstring[0] == bfd_get_symbol_leading_char (objfile->obfd))
519 if (is_vtable_name (tempstring))
522 section = SECT_OFF_DATA (objfile);
523 bfd_section = DBX_DATA_SECTION (objfile);
526 ms_type = mst_file_bss;
527 section = SECT_OFF_BSS (objfile);
528 bfd_section = DBX_BSS_SECTION (objfile);
531 ms_type = mst_unknown;
537 if ((ms_type == mst_file_text || ms_type == mst_text)
538 && address < lowest_text_address)
539 lowest_text_address = address;
541 prim_record_minimal_symbol_and_info
542 (name, address, ms_type, NULL, section, bfd_section, objfile);
545 /* Scan and build partial symbols for a symbol file.
546 We have been initialized by a call to dbx_symfile_init, which
547 put all the relevant info into a "struct dbx_symfile_info",
548 hung off the objfile structure.
550 MAINLINE is true if we are reading the main symbol
551 table (as opposed to a shared lib or dynamically loaded file). */
554 dbx_symfile_read (struct objfile *objfile, int mainline)
558 struct cleanup *back_to;
560 sym_bfd = objfile->obfd;
562 /* .o and .nlm files are relocatables with text, data and bss segs based at
563 0. This flag disables special (Solaris stabs-in-elf only) fixups for
564 symbols with a value of 0. */
566 symfile_relocatable = bfd_get_file_flags (sym_bfd) & HAS_RELOC;
568 /* This is true for Solaris (and all other systems which put stabs
569 in sections, hopefully, since it would be silly to do things
570 differently from Solaris), and false for SunOS4 and other a.out
572 block_address_function_relative =
573 ((0 == strncmp (bfd_get_target (sym_bfd), "elf", 3))
574 || (0 == strncmp (bfd_get_target (sym_bfd), "som", 3))
575 || (0 == strncmp (bfd_get_target (sym_bfd), "coff", 4))
576 || (0 == strncmp (bfd_get_target (sym_bfd), "pe", 2))
577 || (0 == strncmp (bfd_get_target (sym_bfd), "epoc-pe", 7))
578 || (0 == strncmp (bfd_get_target (sym_bfd), "nlm", 3)));
580 val = bfd_seek (sym_bfd, DBX_SYMTAB_OFFSET (objfile), SEEK_SET);
582 perror_with_name (objfile->name);
584 /* If we are reinitializing, or if we have never loaded syms yet, init */
586 || (objfile->global_psymbols.size == 0
587 && objfile->static_psymbols.size == 0))
588 init_psymbol_list (objfile, DBX_SYMCOUNT (objfile));
590 symbol_size = DBX_SYMBOL_SIZE (objfile);
591 symbol_table_offset = DBX_SYMTAB_OFFSET (objfile);
593 free_pending_blocks ();
594 back_to = make_cleanup (really_free_pendings, 0);
596 init_minimal_symbol_collection ();
597 make_cleanup_discard_minimal_symbols ();
599 /* Read stabs data from executable file and define symbols. */
601 read_dbx_symtab (objfile);
603 /* Add the dynamic symbols. */
605 read_dbx_dynamic_symtab (objfile);
607 /* Take the text ranges the STABS partial symbol scanner computed
608 for each of the psymtabs and convert it into the canonical form
611 struct partial_symtab *p;
613 ALL_OBJFILE_PSYMTABS (objfile, p)
615 p->textlow = TEXTLOW (p);
616 p->texthigh = TEXTHIGH (p);
620 /* Install any minimal symbols that have been collected as the current
621 minimal symbols for this objfile. */
623 install_minimal_symbols (objfile);
625 do_cleanups (back_to);
628 /* Initialize anything that needs initializing when a completely new
629 symbol file is specified (not just adding some symbols from another
630 file, e.g. a shared library). */
633 dbx_new_init (struct objfile *ignore)
635 stabsread_new_init ();
636 buildsym_new_init ();
637 init_header_files ();
641 /* dbx_symfile_init ()
642 is the dbx-specific initialization routine for reading symbols.
643 It is passed a struct objfile which contains, among other things,
644 the BFD for the file whose symbols are being read, and a slot for a pointer
645 to "private data" which we fill with goodies.
647 We read the string table into malloc'd space and stash a pointer to it.
649 Since BFD doesn't know how to read debug symbols in a format-independent
650 way (and may never do so...), we have to do it ourselves. We will never
651 be called unless this is an a.out (or very similar) file.
652 FIXME, there should be a cleaner peephole into the BFD environment here. */
654 #define DBX_STRINGTAB_SIZE_SIZE sizeof(long) /* FIXME */
657 dbx_symfile_init (struct objfile *objfile)
660 bfd *sym_bfd = objfile->obfd;
661 char *name = bfd_get_filename (sym_bfd);
663 unsigned char size_temp[DBX_STRINGTAB_SIZE_SIZE];
665 /* Allocate struct to keep track of the symfile */
666 objfile->sym_stab_info = (struct dbx_symfile_info *)
667 xmmalloc (objfile->md, sizeof (struct dbx_symfile_info));
668 memset ((PTR) objfile->sym_stab_info, 0, sizeof (struct dbx_symfile_info));
670 DBX_TEXT_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".text");
671 DBX_DATA_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".data");
672 DBX_BSS_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".bss");
674 /* FIXME POKING INSIDE BFD DATA STRUCTURES */
675 #define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd))
676 #define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd))
678 /* FIXME POKING INSIDE BFD DATA STRUCTURES */
680 DBX_SYMFILE_INFO (objfile)->stab_section_info = NULL;
682 text_sect = bfd_get_section_by_name (sym_bfd, ".text");
684 error ("Can't find .text section in symbol file");
685 DBX_TEXT_ADDR (objfile) = bfd_section_vma (sym_bfd, text_sect);
686 DBX_TEXT_SIZE (objfile) = bfd_section_size (sym_bfd, text_sect);
688 DBX_SYMBOL_SIZE (objfile) = obj_symbol_entry_size (sym_bfd);
689 DBX_SYMCOUNT (objfile) = bfd_get_symcount (sym_bfd);
690 DBX_SYMTAB_OFFSET (objfile) = SYMBOL_TABLE_OFFSET;
692 /* Read the string table and stash it away in the psymbol_obstack. It is
693 only needed as long as we need to expand psymbols into full symbols,
694 so when we blow away the psymbol the string table goes away as well.
695 Note that gdb used to use the results of attempting to malloc the
696 string table, based on the size it read, as a form of sanity check
697 for botched byte swapping, on the theory that a byte swapped string
698 table size would be so totally bogus that the malloc would fail. Now
699 that we put in on the psymbol_obstack, we can't do this since gdb gets
700 a fatal error (out of virtual memory) if the size is bogus. We can
701 however at least check to see if the size is less than the size of
702 the size field itself, or larger than the size of the entire file.
703 Note that all valid string tables have a size greater than zero, since
704 the bytes used to hold the size are included in the count. */
706 if (STRING_TABLE_OFFSET == 0)
708 /* It appears that with the existing bfd code, STRING_TABLE_OFFSET
709 will never be zero, even when there is no string table. This
710 would appear to be a bug in bfd. */
711 DBX_STRINGTAB_SIZE (objfile) = 0;
712 DBX_STRINGTAB (objfile) = NULL;
716 val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, SEEK_SET);
718 perror_with_name (name);
720 memset ((PTR) size_temp, 0, sizeof (size_temp));
721 val = bfd_bread ((PTR) size_temp, sizeof (size_temp), sym_bfd);
724 perror_with_name (name);
728 /* With the existing bfd code, STRING_TABLE_OFFSET will be set to
729 EOF if there is no string table, and attempting to read the size
730 from EOF will read zero bytes. */
731 DBX_STRINGTAB_SIZE (objfile) = 0;
732 DBX_STRINGTAB (objfile) = NULL;
736 /* Read some data that would appear to be the string table size.
737 If there really is a string table, then it is probably the right
738 size. Byteswap if necessary and validate the size. Note that
739 the minimum is DBX_STRINGTAB_SIZE_SIZE. If we just read some
740 random data that happened to be at STRING_TABLE_OFFSET, because
741 bfd can't tell us there is no string table, the sanity checks may
742 or may not catch this. */
743 DBX_STRINGTAB_SIZE (objfile) = bfd_h_get_32 (sym_bfd, size_temp);
745 if (DBX_STRINGTAB_SIZE (objfile) < sizeof (size_temp)
746 || DBX_STRINGTAB_SIZE (objfile) > bfd_get_size (sym_bfd))
747 error ("ridiculous string table size (%d bytes).",
748 DBX_STRINGTAB_SIZE (objfile));
750 DBX_STRINGTAB (objfile) =
751 (char *) obstack_alloc (&objfile->psymbol_obstack,
752 DBX_STRINGTAB_SIZE (objfile));
753 OBJSTAT (objfile, sz_strtab += DBX_STRINGTAB_SIZE (objfile));
755 /* Now read in the string table in one big gulp. */
757 val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, SEEK_SET);
759 perror_with_name (name);
760 val = bfd_bread (DBX_STRINGTAB (objfile),
761 DBX_STRINGTAB_SIZE (objfile),
763 if (val != DBX_STRINGTAB_SIZE (objfile))
764 perror_with_name (name);
769 /* Perform any local cleanups required when we are done with a particular
770 objfile. I.E, we are in the process of discarding all symbol information
771 for an objfile, freeing up all memory held for it, and unlinking the
772 objfile struct from the global list of known objfiles. */
775 dbx_symfile_finish (struct objfile *objfile)
777 if (objfile->sym_stab_info != NULL)
779 if (HEADER_FILES (objfile) != NULL)
781 register int i = N_HEADER_FILES (objfile);
782 register struct header_file *hfiles = HEADER_FILES (objfile);
786 xfree (hfiles[i].name);
787 xfree (hfiles[i].vector);
791 mfree (objfile->md, objfile->sym_stab_info);
793 free_header_files ();
797 /* Buffer for reading the symbol table entries. */
798 static struct external_nlist symbuf[4096];
799 static int symbuf_idx;
800 static int symbuf_end;
802 /* cont_elem is used for continuing information in cfront.
803 It saves information about which types need to be fixed up and
804 completed after all the stabs are read. */
807 /* sym and stabstring for continuing information in cfront */
810 /* state dependencies (statics that must be preserved) */
814 int (*func) (struct objfile *, struct symbol *, char *);
815 /* other state dependencies include:
816 (assumption is that these will not change since process_now FIXME!!)
823 static struct cont_elem *cont_list = 0;
824 static int cont_limit = 0;
825 static int cont_count = 0;
827 /* Arrange for function F to be called with arguments SYM and P later
828 in the stabs reading process. */
830 process_later (struct symbol *sym, char *p,
831 int (*f) (struct objfile *, struct symbol *, char *))
834 /* Allocate more space for the deferred list. */
835 if (cont_count >= cont_limit - 1)
837 cont_limit += 32; /* chunk size */
840 = (struct cont_elem *) xrealloc (cont_list,
842 * sizeof (struct cont_elem)));
844 error ("Virtual memory exhausted\n");
847 /* Save state variables so we can process these stabs later. */
848 cont_list[cont_count].sym_idx = symbuf_idx;
849 cont_list[cont_count].sym_end = symbuf_end;
850 cont_list[cont_count].symnum = symnum;
851 cont_list[cont_count].sym = sym;
852 cont_list[cont_count].stabs = p;
853 cont_list[cont_count].func = f;
857 /* Call deferred funtions in CONT_LIST. */
860 process_now (struct objfile *objfile)
869 int (*func) (struct objfile *, struct symbol *, char *);
871 /* Save the state of our caller, we'll want to restore it before
873 save_symbuf_idx = symbuf_idx;
874 save_symbuf_end = symbuf_end;
875 save_symnum = symnum;
877 /* Iterate over all the deferred stabs. */
878 for (i = 0; i < cont_count; i++)
880 /* Restore the state for this deferred stab. */
881 symbuf_idx = cont_list[i].sym_idx;
882 symbuf_end = cont_list[i].sym_end;
883 symnum = cont_list[i].symnum;
884 sym = cont_list[i].sym;
885 stabs = cont_list[i].stabs;
886 func = cont_list[i].func;
888 /* Call the function to handle this deferrd stab. */
889 err = (*func) (objfile, sym, stabs);
891 error ("Internal error: unable to resolve stab.\n");
894 /* Restore our caller's state. */
895 symbuf_idx = save_symbuf_idx;
896 symbuf_end = save_symbuf_end;
897 symnum = save_symnum;
902 /* Name of last function encountered. Used in Solaris to approximate
903 object file boundaries. */
904 static char *last_function_name;
906 /* The address in memory of the string table of the object file we are
907 reading (which might not be the "main" object file, but might be a
908 shared library or some other dynamically loaded thing). This is
909 set by read_dbx_symtab when building psymtabs, and by
910 read_ofile_symtab when building symtabs, and is used only by
911 next_symbol_text. FIXME: If that is true, we don't need it when
912 building psymtabs, right? */
913 static char *stringtab_global;
915 /* These variables are used to control fill_symbuf when the stabs
916 symbols are not contiguous (as may be the case when a COFF file is
917 linked using --split-by-reloc). */
918 static struct stab_section_list *symbuf_sections;
919 static unsigned int symbuf_left;
920 static unsigned int symbuf_read;
922 /* Refill the symbol table input buffer
923 and set the variables that control fetching entries from it.
924 Reports an error if no data available.
925 This function can read past the end of the symbol table
926 (into the string table) but this does no harm. */
929 fill_symbuf (bfd *sym_bfd)
934 if (symbuf_sections == NULL)
935 count = sizeof (symbuf);
938 if (symbuf_left <= 0)
940 file_ptr filepos = symbuf_sections->section->filepos;
941 if (bfd_seek (sym_bfd, filepos, SEEK_SET) != 0)
942 perror_with_name (bfd_get_filename (sym_bfd));
943 symbuf_left = bfd_section_size (sym_bfd, symbuf_sections->section);
944 symbol_table_offset = filepos - symbuf_read;
945 symbuf_sections = symbuf_sections->next;
949 if (count > sizeof (symbuf))
950 count = sizeof (symbuf);
953 nbytes = bfd_bread ((PTR) symbuf, count, sym_bfd);
955 perror_with_name (bfd_get_filename (sym_bfd));
956 else if (nbytes == 0)
957 error ("Premature end of file reading symbol table");
958 symbuf_end = nbytes / symbol_size;
960 symbuf_left -= nbytes;
961 symbuf_read += nbytes;
964 #define INTERNALIZE_SYMBOL(intern, extern, abfd) \
966 (intern).n_type = bfd_h_get_8 (abfd, (extern)->e_type); \
967 (intern).n_strx = bfd_h_get_32 (abfd, (extern)->e_strx); \
968 (intern).n_desc = bfd_h_get_16 (abfd, (extern)->e_desc); \
969 if (bfd_get_sign_extend_vma (abfd)) \
970 (intern).n_value = bfd_h_get_signed_32 (abfd, (extern)->e_value); \
972 (intern).n_value = bfd_h_get_32 (abfd, (extern)->e_value); \
975 /* Invariant: The symbol pointed to by symbuf_idx is the first one
976 that hasn't been swapped. Swap the symbol at the same time
977 that symbuf_idx is incremented. */
979 /* dbx allows the text of a symbol name to be continued into the
980 next symbol name! When such a continuation is encountered
981 (a \ at the end of the text of a name)
982 call this function to get the continuation. */
985 dbx_next_symbol_text (struct objfile *objfile)
987 struct internal_nlist nlist;
989 if (symbuf_idx == symbuf_end)
990 fill_symbuf (symfile_bfd);
993 INTERNALIZE_SYMBOL (nlist, &symbuf[symbuf_idx], symfile_bfd);
994 OBJSTAT (objfile, n_stabs++);
998 return nlist.n_strx + stringtab_global + file_string_table_offset;
1001 /* Initialize the list of bincls to contain none and have some
1005 init_bincl_list (int number, struct objfile *objfile)
1007 bincls_allocated = number;
1008 next_bincl = bincl_list = (struct header_file_location *)
1009 xmmalloc (objfile->md, bincls_allocated * sizeof (struct header_file_location));
1012 /* Add a bincl to the list. */
1015 add_bincl_to_list (struct partial_symtab *pst, char *name, int instance)
1017 if (next_bincl >= bincl_list + bincls_allocated)
1019 int offset = next_bincl - bincl_list;
1020 bincls_allocated *= 2;
1021 bincl_list = (struct header_file_location *)
1022 xmrealloc (pst->objfile->md, (char *) bincl_list,
1023 bincls_allocated * sizeof (struct header_file_location));
1024 next_bincl = bincl_list + offset;
1026 next_bincl->pst = pst;
1027 next_bincl->instance = instance;
1028 next_bincl++->name = name;
1031 /* Given a name, value pair, find the corresponding
1032 bincl in the list. Return the partial symtab associated
1033 with that header_file_location. */
1035 static struct partial_symtab *
1036 find_corresponding_bincl_psymtab (char *name, int instance)
1038 struct header_file_location *bincl;
1040 for (bincl = bincl_list; bincl < next_bincl; bincl++)
1041 if (bincl->instance == instance
1042 && STREQ (name, bincl->name))
1045 complain (&repeated_header_complaint, name, symnum);
1046 return (struct partial_symtab *) 0;
1049 /* Free the storage allocated for the bincl list. */
1052 free_bincl_list (struct objfile *objfile)
1054 mfree (objfile->md, (PTR) bincl_list);
1055 bincls_allocated = 0;
1059 do_free_bincl_list_cleanup (void *objfile)
1061 free_bincl_list (objfile);
1064 static struct cleanup *
1065 make_cleanup_free_bincl_list (struct objfile *objfile)
1067 return make_cleanup (do_free_bincl_list_cleanup, objfile);
1070 /* Scan a SunOs dynamic symbol table for symbols of interest and
1071 add them to the minimal symbol table. */
1074 read_dbx_dynamic_symtab (struct objfile *objfile)
1076 bfd *abfd = objfile->obfd;
1077 struct cleanup *back_to;
1087 CORE_ADDR sym_value;
1090 /* Check that the symbol file has dynamic symbols that we know about.
1091 bfd_arch_unknown can happen if we are reading a sun3 symbol file
1092 on a sun4 host (and vice versa) and bfd is not configured
1093 --with-target=all. This would trigger an assertion in bfd/sunos.c,
1094 so we ignore the dynamic symbols in this case. */
1095 if (bfd_get_flavour (abfd) != bfd_target_aout_flavour
1096 || (bfd_get_file_flags (abfd) & DYNAMIC) == 0
1097 || bfd_get_arch (abfd) == bfd_arch_unknown)
1100 dynsym_size = bfd_get_dynamic_symtab_upper_bound (abfd);
1101 if (dynsym_size < 0)
1104 dynsyms = (asymbol **) xmalloc (dynsym_size);
1105 back_to = make_cleanup (xfree, dynsyms);
1107 dynsym_count = bfd_canonicalize_dynamic_symtab (abfd, dynsyms);
1108 if (dynsym_count < 0)
1110 do_cleanups (back_to);
1114 /* Enter dynamic symbols into the minimal symbol table
1115 if this is a stripped executable. */
1116 if (bfd_get_symcount (abfd) <= 0)
1119 for (counter = 0; counter < dynsym_count; counter++, symptr++)
1121 asymbol *sym = *symptr;
1125 sec = bfd_get_section (sym);
1127 /* BFD symbols are section relative. */
1128 sym_value = sym->value + sec->vma;
1130 if (bfd_get_section_flags (abfd, sec) & SEC_CODE)
1132 sym_value += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
1135 else if (bfd_get_section_flags (abfd, sec) & SEC_DATA)
1137 sym_value += ANOFFSET (objfile->section_offsets, SECT_OFF_DATA (objfile));
1140 else if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
1142 sym_value += ANOFFSET (objfile->section_offsets, SECT_OFF_BSS (objfile));
1148 if (sym->flags & BSF_GLOBAL)
1151 record_minimal_symbol ((char *) bfd_asymbol_name (sym), sym_value,
1156 /* Symbols from shared libraries have a dynamic relocation entry
1157 that points to the associated slot in the procedure linkage table.
1158 We make a mininal symbol table entry with type mst_solib_trampoline
1159 at the address in the procedure linkage table. */
1160 dynrel_size = bfd_get_dynamic_reloc_upper_bound (abfd);
1161 if (dynrel_size < 0)
1163 do_cleanups (back_to);
1167 dynrels = (arelent **) xmalloc (dynrel_size);
1168 make_cleanup (xfree, dynrels);
1170 dynrel_count = bfd_canonicalize_dynamic_reloc (abfd, dynrels, dynsyms);
1171 if (dynrel_count < 0)
1173 do_cleanups (back_to);
1177 for (counter = 0, relptr = dynrels;
1178 counter < dynrel_count;
1179 counter++, relptr++)
1181 arelent *rel = *relptr;
1183 rel->address + ANOFFSET (objfile->section_offsets, SECT_OFF_DATA (objfile));
1185 switch (bfd_get_arch (abfd))
1187 case bfd_arch_sparc:
1188 if (rel->howto->type != RELOC_JMP_SLOT)
1192 /* `16' is the type BFD produces for a jump table relocation. */
1193 if (rel->howto->type != 16)
1196 /* Adjust address in the jump table to point to
1197 the start of the bsr instruction. */
1204 name = (char *) bfd_asymbol_name (*rel->sym_ptr_ptr);
1205 prim_record_minimal_symbol (name, address, mst_solib_trampoline,
1209 do_cleanups (back_to);
1212 /* Setup partial_symtab's describing each source file for which
1213 debugging information is available. */
1216 read_dbx_symtab (struct objfile *objfile)
1218 register struct external_nlist *bufp = 0; /* =0 avoids gcc -Wall glitch */
1219 struct internal_nlist nlist;
1220 CORE_ADDR text_addr;
1223 register char *namestring;
1225 int past_first_source_file = 0;
1226 CORE_ADDR last_o_file_start = 0;
1227 CORE_ADDR last_function_start = 0;
1228 struct cleanup *back_to;
1230 int textlow_not_set;
1232 /* Current partial symtab */
1233 struct partial_symtab *pst;
1235 /* List of current psymtab's include files */
1236 char **psymtab_include_list;
1237 int includes_allocated;
1240 /* Index within current psymtab dependency list */
1241 struct partial_symtab **dependency_list;
1242 int dependencies_used, dependencies_allocated;
1244 text_addr = DBX_TEXT_ADDR (objfile);
1245 text_size = DBX_TEXT_SIZE (objfile);
1247 /* FIXME. We probably want to change stringtab_global rather than add this
1248 while processing every symbol entry. FIXME. */
1249 file_string_table_offset = 0;
1250 next_file_string_table_offset = 0;
1252 stringtab_global = DBX_STRINGTAB (objfile);
1254 pst = (struct partial_symtab *) 0;
1256 includes_allocated = 30;
1258 psymtab_include_list = (char **) alloca (includes_allocated *
1261 dependencies_allocated = 30;
1262 dependencies_used = 0;
1264 (struct partial_symtab **) alloca (dependencies_allocated *
1265 sizeof (struct partial_symtab *));
1267 /* Init bincl list */
1268 init_bincl_list (20, objfile);
1269 back_to = make_cleanup_free_bincl_list (objfile);
1271 last_source_file = NULL;
1273 lowest_text_address = (CORE_ADDR) -1;
1275 symfile_bfd = objfile->obfd; /* For next_text_symbol */
1276 abfd = objfile->obfd;
1277 symbuf_end = symbuf_idx = 0;
1278 next_symbol_text_func = dbx_next_symbol_text;
1279 textlow_not_set = 1;
1280 has_line_numbers = 0;
1282 for (symnum = 0; symnum < DBX_SYMCOUNT (objfile); symnum++)
1284 /* Get the symbol for this run and pull out some info */
1285 QUIT; /* allow this to be interruptable */
1286 if (symbuf_idx == symbuf_end)
1288 bufp = &symbuf[symbuf_idx++];
1291 * Special case to speed up readin.
1293 if (bfd_h_get_8 (abfd, bufp->e_type) == N_SLINE)
1295 has_line_numbers = 1;
1299 INTERNALIZE_SYMBOL (nlist, bufp, abfd);
1300 OBJSTAT (objfile, n_stabs++);
1302 /* Ok. There is a lot of code duplicated in the rest of this
1303 switch statement (for efficiency reasons). Since I don't
1304 like duplicating code, I will do my penance here, and
1305 describe the code which is duplicated:
1307 *) The assignment to namestring.
1308 *) The call to strchr.
1309 *) The addition of a partial symbol the the two partial
1310 symbol lists. This last is a large section of code, so
1311 I've imbedded it in the following macro.
1314 /* Set namestring based on nlist. If the string table index is invalid,
1315 give a fake name, and print a single error message per symbol file read,
1316 rather than abort the symbol reading or flood the user with messages. */
1318 /*FIXME: Too many adds and indirections in here for the inner loop. */
1319 #define SET_NAMESTRING()\
1320 if (((unsigned)CUR_SYMBOL_STRX + file_string_table_offset) >= \
1321 DBX_STRINGTAB_SIZE (objfile)) { \
1322 complain (&string_table_offset_complaint, symnum); \
1323 namestring = "<bad string table offset>"; \
1325 namestring = CUR_SYMBOL_STRX + file_string_table_offset + \
1326 DBX_STRINGTAB (objfile)
1328 #define CUR_SYMBOL_TYPE nlist.n_type
1329 #define CUR_SYMBOL_VALUE nlist.n_value
1330 #define CUR_SYMBOL_STRX nlist.n_strx
1331 #define DBXREAD_ONLY
1332 #define START_PSYMTAB(ofile,fname,low,symoff,global_syms,static_syms)\
1333 start_psymtab(ofile, fname, low, symoff, global_syms, static_syms)
1334 #define END_PSYMTAB(pst,ilist,ninc,c_off,c_text,dep_list,n_deps,textlow_not_set)\
1335 end_psymtab(pst,ilist,ninc,c_off,c_text,dep_list,n_deps,textlow_not_set)
1337 #include "partial-stab.h"
1340 /* If there's stuff to be cleaned up, clean it up. */
1341 if (DBX_SYMCOUNT (objfile) > 0 /* We have some syms */
1342 /*FIXME, does this have a bug at start address 0? */
1343 && last_o_file_start
1344 && objfile->ei.entry_point < nlist.n_value
1345 && objfile->ei.entry_point >= last_o_file_start)
1347 objfile->ei.entry_file_lowpc = last_o_file_start;
1348 objfile->ei.entry_file_highpc = nlist.n_value;
1353 /* Don't set pst->texthigh lower than it already is. */
1354 CORE_ADDR text_end =
1355 (lowest_text_address == (CORE_ADDR) -1
1356 ? (text_addr + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)))
1357 : lowest_text_address)
1360 end_psymtab (pst, psymtab_include_list, includes_used,
1361 symnum * symbol_size,
1362 text_end > TEXTHIGH (pst) ? text_end : TEXTHIGH (pst),
1363 dependency_list, dependencies_used, textlow_not_set);
1366 do_cleanups (back_to);
1369 /* Allocate and partially fill a partial symtab. It will be
1370 completely filled at the end of the symbol list.
1372 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
1373 is the address relative to which its symbols are (incremental) or 0
1377 static struct partial_symtab *
1378 start_psymtab (struct objfile *objfile, char *filename, CORE_ADDR textlow,
1379 int ldsymoff, struct partial_symbol **global_syms,
1380 struct partial_symbol **static_syms)
1382 struct partial_symtab *result =
1383 start_psymtab_common (objfile, objfile->section_offsets,
1384 filename, textlow, global_syms, static_syms);
1386 result->read_symtab_private = (char *)
1387 obstack_alloc (&objfile->psymbol_obstack, sizeof (struct symloc));
1388 TEXTLOW (result) = result->textlow;
1389 TEXTHIGH (result) = result->texthigh;
1390 LDSYMOFF (result) = ldsymoff;
1391 result->read_symtab = dbx_psymtab_to_symtab;
1392 SYMBOL_SIZE (result) = symbol_size;
1393 SYMBOL_OFFSET (result) = symbol_table_offset;
1394 STRING_OFFSET (result) = string_table_offset;
1395 FILE_STRING_OFFSET (result) = file_string_table_offset;
1397 /* If we're handling an ELF file, drag some section-relocation info
1398 for this source file out of the ELF symbol table, to compensate for
1399 Sun brain death. This replaces the section_offsets in this psymtab,
1401 elfstab_offset_sections (objfile, result);
1403 /* Deduce the source language from the filename for this psymtab. */
1404 psymtab_language = deduce_language_from_filename (filename);
1409 /* Close off the current usage of PST.
1410 Returns PST or NULL if the partial symtab was empty and thrown away.
1412 FIXME: List variables and peculiarities of same. */
1414 struct partial_symtab *
1415 end_psymtab (struct partial_symtab *pst, char **include_list, int num_includes,
1416 int capping_symbol_offset, CORE_ADDR capping_text,
1417 struct partial_symtab **dependency_list, int number_dependencies,
1418 int textlow_not_set)
1421 struct objfile *objfile = pst->objfile;
1423 if (capping_symbol_offset != -1)
1424 LDSYMLEN (pst) = capping_symbol_offset - LDSYMOFF (pst);
1425 TEXTHIGH (pst) = capping_text;
1427 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
1428 /* Under Solaris, the N_SO symbols always have a value of 0,
1429 instead of the usual address of the .o file. Therefore,
1430 we have to do some tricks to fill in texthigh and textlow.
1431 The first trick is in partial-stab.h: if we see a static
1432 or global function, and the textlow for the current pst
1433 is not set (ie: textlow_not_set), then we use that function's
1434 address for the textlow of the pst. */
1436 /* Now, to fill in texthigh, we remember the last function seen
1437 in the .o file (also in partial-stab.h). Also, there's a hack in
1438 bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
1439 to here via the misc_info field. Therefore, we can fill in
1440 a reliable texthigh by taking the address plus size of the
1441 last function in the file. */
1443 if (TEXTHIGH (pst) == 0 && last_function_name)
1447 struct minimal_symbol *minsym;
1449 p = strchr (last_function_name, ':');
1451 p = last_function_name;
1452 n = p - last_function_name;
1454 strncpy (p, last_function_name, n);
1457 minsym = lookup_minimal_symbol (p, pst->filename, objfile);
1460 /* Sun Fortran appends an underscore to the minimal symbol name,
1461 try again with an appended underscore if the minimal symbol
1465 minsym = lookup_minimal_symbol (p, pst->filename, objfile);
1469 TEXTHIGH (pst) = SYMBOL_VALUE_ADDRESS (minsym) + MSYMBOL_SIZE (minsym);
1471 last_function_name = NULL;
1474 /* this test will be true if the last .o file is only data */
1475 if (textlow_not_set)
1476 TEXTLOW (pst) = TEXTHIGH (pst);
1479 struct partial_symtab *p1;
1481 /* If we know our own starting text address, then walk through all other
1482 psymtabs for this objfile, and if any didn't know their ending text
1483 address, set it to our starting address. Take care to not set our
1484 own ending address to our starting address, nor to set addresses on
1485 `dependency' files that have both textlow and texthigh zero. */
1487 ALL_OBJFILE_PSYMTABS (objfile, p1)
1489 if (TEXTHIGH (p1) == 0 && TEXTLOW (p1) != 0 && p1 != pst)
1491 TEXTHIGH (p1) = TEXTLOW (pst);
1492 /* if this file has only data, then make textlow match texthigh */
1493 if (TEXTLOW (p1) == 0)
1494 TEXTLOW (p1) = TEXTHIGH (p1);
1499 /* End of kludge for patching Solaris textlow and texthigh. */
1500 #endif /* SOFUN_ADDRESS_MAYBE_MISSING. */
1502 pst->n_global_syms =
1503 objfile->global_psymbols.next - (objfile->global_psymbols.list + pst->globals_offset);
1504 pst->n_static_syms =
1505 objfile->static_psymbols.next - (objfile->static_psymbols.list + pst->statics_offset);
1507 pst->number_of_dependencies = number_dependencies;
1508 if (number_dependencies)
1510 pst->dependencies = (struct partial_symtab **)
1511 obstack_alloc (&objfile->psymbol_obstack,
1512 number_dependencies * sizeof (struct partial_symtab *));
1513 memcpy (pst->dependencies, dependency_list,
1514 number_dependencies * sizeof (struct partial_symtab *));
1517 pst->dependencies = 0;
1519 for (i = 0; i < num_includes; i++)
1521 struct partial_symtab *subpst =
1522 allocate_psymtab (include_list[i], objfile);
1524 /* Copy the sesction_offsets array from the main psymtab. */
1525 subpst->section_offsets = pst->section_offsets;
1526 subpst->read_symtab_private =
1527 (char *) obstack_alloc (&objfile->psymbol_obstack,
1528 sizeof (struct symloc));
1532 TEXTHIGH (subpst) = 0;
1534 /* We could save slight bits of space by only making one of these,
1535 shared by the entire set of include files. FIXME-someday. */
1536 subpst->dependencies = (struct partial_symtab **)
1537 obstack_alloc (&objfile->psymbol_obstack,
1538 sizeof (struct partial_symtab *));
1539 subpst->dependencies[0] = pst;
1540 subpst->number_of_dependencies = 1;
1542 subpst->globals_offset =
1543 subpst->n_global_syms =
1544 subpst->statics_offset =
1545 subpst->n_static_syms = 0;
1549 subpst->read_symtab = pst->read_symtab;
1552 sort_pst_symbols (pst);
1554 /* If there is already a psymtab or symtab for a file of this name, remove it.
1555 (If there is a symtab, more drastic things also happen.)
1556 This happens in VxWorks. */
1557 free_named_symtabs (pst->filename);
1559 if (num_includes == 0
1560 && number_dependencies == 0
1561 && pst->n_global_syms == 0
1562 && pst->n_static_syms == 0
1563 && has_line_numbers == 0)
1565 /* Throw away this psymtab, it's empty. We can't deallocate it, since
1566 it is on the obstack, but we can forget to chain it on the list. */
1567 /* Empty psymtabs happen as a result of header files which don't have
1568 any symbols in them. There can be a lot of them. But this check
1569 is wrong, in that a psymtab with N_SLINE entries but nothing else
1570 is not empty, but we don't realize that. Fixing that without slowing
1571 things down might be tricky. */
1573 discard_psymtab (pst);
1575 /* Indicate that psymtab was thrown away. */
1576 pst = (struct partial_symtab *) NULL;
1582 dbx_psymtab_to_symtab_1 (struct partial_symtab *pst)
1584 struct cleanup *old_chain;
1592 fprintf_unfiltered (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
1597 /* Read in all partial symtabs on which this one is dependent */
1598 for (i = 0; i < pst->number_of_dependencies; i++)
1599 if (!pst->dependencies[i]->readin)
1601 /* Inform about additional files that need to be read in. */
1604 fputs_filtered (" ", gdb_stdout);
1606 fputs_filtered ("and ", gdb_stdout);
1608 printf_filtered ("%s...", pst->dependencies[i]->filename);
1609 wrap_here (""); /* Flush output */
1610 gdb_flush (gdb_stdout);
1612 dbx_psymtab_to_symtab_1 (pst->dependencies[i]);
1615 if (LDSYMLEN (pst)) /* Otherwise it's a dummy */
1617 /* Init stuff necessary for reading in symbols */
1620 old_chain = make_cleanup (really_free_pendings, 0);
1621 file_string_table_offset = FILE_STRING_OFFSET (pst);
1622 symbol_size = SYMBOL_SIZE (pst);
1624 /* Read in this file's symbols */
1625 bfd_seek (pst->objfile->obfd, SYMBOL_OFFSET (pst), SEEK_SET);
1626 read_ofile_symtab (pst);
1627 sort_symtab_syms (pst->symtab);
1629 do_cleanups (old_chain);
1635 /* Read in all of the symbols for a given psymtab for real.
1636 Be verbose about it if the user wants that. */
1639 dbx_psymtab_to_symtab (struct partial_symtab *pst)
1648 fprintf_unfiltered (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
1653 if (LDSYMLEN (pst) || pst->number_of_dependencies)
1655 /* Print the message now, before reading the string table,
1656 to avoid disconcerting pauses. */
1659 printf_filtered ("Reading in symbols for %s...", pst->filename);
1660 gdb_flush (gdb_stdout);
1663 sym_bfd = pst->objfile->obfd;
1665 next_symbol_text_func = dbx_next_symbol_text;
1667 dbx_psymtab_to_symtab_1 (pst);
1669 /* Match with global symbols. This only needs to be done once,
1670 after all of the symtabs and dependencies have been read in. */
1671 scan_file_globals (pst->objfile);
1673 /* Finish up the debug error message. */
1675 printf_filtered ("done.\n");
1679 /* Read in a defined section of a specific object file's symbols. */
1682 read_ofile_symtab (struct partial_symtab *pst)
1684 register char *namestring;
1685 register struct external_nlist *bufp;
1686 struct internal_nlist nlist;
1688 unsigned max_symnum;
1690 struct objfile *objfile;
1691 int sym_offset; /* Offset to start of symbols to read */
1692 int sym_size; /* Size of symbols to read */
1693 CORE_ADDR text_offset; /* Start of text segment for symbols */
1694 int text_size; /* Size of text segment for symbols */
1695 struct section_offsets *section_offsets;
1697 objfile = pst->objfile;
1698 sym_offset = LDSYMOFF (pst);
1699 sym_size = LDSYMLEN (pst);
1700 text_offset = TEXTLOW (pst);
1701 text_size = TEXTHIGH (pst) - TEXTLOW (pst);
1702 /* This cannot be simply objfile->section_offsets because of
1703 elfstab_offset_sections() which initializes the psymtab section
1704 offsets information in a special way, and that is different from
1705 objfile->section_offsets. */
1706 section_offsets = pst->section_offsets;
1708 current_objfile = objfile;
1709 subfile_stack = NULL;
1711 stringtab_global = DBX_STRINGTAB (objfile);
1712 last_source_file = NULL;
1714 abfd = objfile->obfd;
1715 symfile_bfd = objfile->obfd; /* Implicit param to next_text_symbol */
1716 symbuf_end = symbuf_idx = 0;
1718 /* It is necessary to actually read one symbol *before* the start
1719 of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
1720 occurs before the N_SO symbol.
1722 Detecting this in read_dbx_symtab
1723 would slow down initial readin, so we look for it here instead. */
1724 if (!processing_acc_compilation && sym_offset >= (int) symbol_size)
1726 bfd_seek (symfile_bfd, sym_offset - symbol_size, SEEK_CUR);
1728 bufp = &symbuf[symbuf_idx++];
1729 INTERNALIZE_SYMBOL (nlist, bufp, abfd);
1730 OBJSTAT (objfile, n_stabs++);
1734 processing_gcc_compilation = 0;
1735 if (nlist.n_type == N_TEXT)
1737 const char *tempstring = namestring;
1739 if (STREQ (namestring, GCC_COMPILED_FLAG_SYMBOL))
1740 processing_gcc_compilation = 1;
1741 else if (STREQ (namestring, GCC2_COMPILED_FLAG_SYMBOL))
1742 processing_gcc_compilation = 2;
1743 if (tempstring[0] == bfd_get_symbol_leading_char (symfile_bfd))
1745 if (STREQN (tempstring, "__gnu_compiled", 14))
1746 processing_gcc_compilation = 2;
1749 /* Try to select a C++ demangling based on the compilation unit
1753 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
1754 know whether it will use the old style or v3 mangling. */
1755 if (processing_gcc_compilation)
1757 if (AUTO_DEMANGLING)
1759 set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
1766 /* The N_SO starting this symtab is the first symbol, so we
1767 better not check the symbol before it. I'm not this can
1768 happen, but it doesn't hurt to check for it. */
1769 bfd_seek (symfile_bfd, sym_offset, SEEK_CUR);
1770 processing_gcc_compilation = 0;
1773 if (symbuf_idx == symbuf_end)
1775 bufp = &symbuf[symbuf_idx];
1776 if (bfd_h_get_8 (abfd, bufp->e_type) != N_SO)
1777 error ("First symbol in segment of executable not a source symbol");
1779 max_symnum = sym_size / symbol_size;
1782 symnum < max_symnum;
1785 QUIT; /* Allow this to be interruptable */
1786 if (symbuf_idx == symbuf_end)
1788 bufp = &symbuf[symbuf_idx++];
1789 INTERNALIZE_SYMBOL (nlist, bufp, abfd);
1790 OBJSTAT (objfile, n_stabs++);
1792 type = bfd_h_get_8 (abfd, bufp->e_type);
1798 process_one_symbol (type, nlist.n_desc, nlist.n_value,
1799 namestring, section_offsets, objfile);
1801 /* We skip checking for a new .o or -l file; that should never
1802 happen in this routine. */
1803 else if (type == N_TEXT)
1805 /* I don't think this code will ever be executed, because
1806 the GCC_COMPILED_FLAG_SYMBOL usually is right before
1807 the N_SO symbol which starts this source file.
1808 However, there is no reason not to accept
1809 the GCC_COMPILED_FLAG_SYMBOL anywhere. */
1811 if (STREQ (namestring, GCC_COMPILED_FLAG_SYMBOL))
1812 processing_gcc_compilation = 1;
1813 else if (STREQ (namestring, GCC2_COMPILED_FLAG_SYMBOL))
1814 processing_gcc_compilation = 2;
1817 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
1818 know whether it will use the old style or v3 mangling. */
1819 if (AUTO_DEMANGLING)
1821 set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
1825 else if (type & N_EXT || type == (unsigned char) N_TEXT
1826 || type == (unsigned char) N_NBTEXT
1829 /* Global symbol: see if we came across a dbx defintion for
1830 a corresponding symbol. If so, store the value. Remove
1831 syms from the chain when their values are stored, but
1832 search the whole chain, as there may be several syms from
1833 different files with the same name. */
1834 /* This is probably not true. Since the files will be read
1835 in one at a time, each reference to a global symbol will
1836 be satisfied in each file as it appears. So we skip this
1842 current_objfile = NULL;
1844 /* In a Solaris elf file, this variable, which comes from the
1845 value of the N_SO symbol, will still be 0. Luckily, text_offset,
1846 which comes from TEXTLOW (pst) is correct. */
1847 if (last_source_start_addr == 0)
1848 last_source_start_addr = text_offset;
1850 /* In reordered executables last_source_start_addr may not be the
1851 lower bound for this symtab, instead use text_offset which comes
1852 from TEXTLOW (pst) which is correct. */
1853 if (last_source_start_addr > text_offset)
1854 last_source_start_addr = text_offset;
1856 pst->symtab = end_symtab (text_offset + text_size, objfile, SECT_OFF_TEXT (objfile));
1858 /* Process items which we had to "process_later" due to dependencies
1860 process_now (objfile);
1866 /* This handles a single symbol from the symbol-file, building symbols
1867 into a GDB symtab. It takes these arguments and an implicit argument.
1869 TYPE is the type field of the ".stab" symbol entry.
1870 DESC is the desc field of the ".stab" entry.
1871 VALU is the value field of the ".stab" entry.
1872 NAME is the symbol name, in our address space.
1873 SECTION_OFFSETS is a set of amounts by which the sections of this object
1874 file were relocated when it was loaded into memory.
1875 Note that these section_offsets are not the
1876 objfile->section_offsets but the pst->section_offsets.
1877 All symbols that refer
1878 to memory locations need to be offset by these amounts.
1879 OBJFILE is the object file from which we are reading symbols.
1880 It is used in end_symtab. */
1883 process_one_symbol (int type, int desc, CORE_ADDR valu, char *name,
1884 struct section_offsets *section_offsets,
1885 struct objfile *objfile)
1887 #ifdef SUN_FIXED_LBRAC_BUG
1888 /* If SUN_FIXED_LBRAC_BUG is defined, then it tells us whether we need
1889 to correct the address of N_LBRAC's. If it is not defined, then
1890 we never need to correct the addresses. */
1892 /* This records the last pc address we've seen. We depend on there being
1893 an SLINE or FUN or SO before the first LBRAC, since the variable does
1894 not get reset in between reads of different symbol files. */
1895 static CORE_ADDR last_pc_address;
1898 register struct context_stack *new;
1899 /* This remembers the address of the start of a function. It is used
1900 because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries are
1901 relative to the current function's start address. On systems
1902 other than Solaris 2, this just holds the SECT_OFF_TEXT value, and is
1903 used to relocate these symbol types rather than SECTION_OFFSETS. */
1904 static CORE_ADDR function_start_offset;
1906 /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this source
1907 file. Used to detect the SunPRO solaris compiler. */
1908 static int n_opt_found;
1910 /* The stab type used for the definition of the last function.
1911 N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */
1912 static int function_stab_type = 0;
1914 if (!block_address_function_relative)
1915 /* N_LBRAC, N_RBRAC and N_SLINE entries are not relative to the
1916 function start address, so just use the text offset. */
1917 function_start_offset = ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
1919 /* Something is wrong if we see real data before
1920 seeing a source file name. */
1922 if (last_source_file == NULL && type != (unsigned char) N_SO)
1924 /* Ignore any symbols which appear before an N_SO symbol.
1925 Currently no one puts symbols there, but we should deal
1926 gracefully with the case. A complain()t might be in order,
1927 but this should not be an error (). */
1936 if (*name == '\000')
1938 /* This N_FUN marks the end of a function. This closes off the
1940 within_function = 0;
1941 new = pop_context ();
1943 /* Make a block for the local symbols within. */
1944 finish_block (new->name, &local_symbols, new->old_blocks,
1945 new->start_addr, new->start_addr + valu,
1948 /* May be switching to an assembler file which may not be using
1949 block relative stabs, so reset the offset. */
1950 if (block_address_function_relative)
1951 function_start_offset = 0;
1956 /* Relocate for dynamic loading */
1957 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
1958 #ifdef SMASH_TEXT_ADDRESS
1959 SMASH_TEXT_ADDRESS (valu);
1961 goto define_a_symbol;
1964 /* This "symbol" just indicates the start of an inner lexical
1965 context within a function. */
1967 /* Ignore extra outermost context from SunPRO cc and acc. */
1968 if (n_opt_found && desc == 1)
1971 if (block_address_function_relative)
1972 /* Relocate for Sun ELF acc fn-relative syms. */
1973 valu += function_start_offset;
1975 /* On most machines, the block addresses are relative to the
1976 N_SO, the linker did not relocate them (sigh). */
1977 valu += last_source_start_addr;
1979 #ifdef SUN_FIXED_LBRAC_BUG
1980 if (!SUN_FIXED_LBRAC_BUG && valu < last_pc_address)
1982 /* Patch current LBRAC pc value to match last handy pc value */
1983 complain (&lbrac_complaint);
1984 valu = last_pc_address;
1987 new = push_context (desc, valu);
1991 /* This "symbol" just indicates the end of an inner lexical
1992 context that was started with N_LBRAC. */
1994 /* Ignore extra outermost context from SunPRO cc and acc. */
1995 if (n_opt_found && desc == 1)
1998 if (block_address_function_relative)
1999 /* Relocate for Sun ELF acc fn-relative syms. */
2000 valu += function_start_offset;
2002 /* On most machines, the block addresses are relative to the
2003 N_SO, the linker did not relocate them (sigh). */
2004 valu += last_source_start_addr;
2006 new = pop_context ();
2007 if (desc != new->depth)
2008 complain (&lbrac_mismatch_complaint, symnum);
2010 /* Some compilers put the variable decls inside of an
2011 LBRAC/RBRAC block. This macro should be nonzero if this
2012 is true. DESC is N_DESC from the N_RBRAC symbol.
2013 GCC_P is true if we've detected the GCC_COMPILED_SYMBOL
2014 or the GCC2_COMPILED_SYMBOL. */
2015 #if !defined (VARIABLES_INSIDE_BLOCK)
2016 #define VARIABLES_INSIDE_BLOCK(desc, gcc_p) 0
2019 /* Can only use new->locals as local symbols here if we're in
2020 gcc or on a machine that puts them before the lbrack. */
2021 if (!VARIABLES_INSIDE_BLOCK (desc, processing_gcc_compilation))
2022 local_symbols = new->locals;
2024 if (context_stack_depth
2025 > !VARIABLES_INSIDE_BLOCK (desc, processing_gcc_compilation))
2027 /* This is not the outermost LBRAC...RBRAC pair in the function,
2028 its local symbols preceded it, and are the ones just recovered
2029 from the context stack. Define the block for them (but don't
2030 bother if the block contains no symbols. Should we complain
2031 on blocks without symbols? I can't think of any useful purpose
2033 if (local_symbols != NULL)
2035 /* Muzzle a compiler bug that makes end < start. (which
2036 compilers? Is this ever harmful?). */
2037 if (new->start_addr > valu)
2039 complain (&lbrac_rbrac_complaint);
2040 new->start_addr = valu;
2042 /* Make a block for the local symbols within. */
2043 finish_block (0, &local_symbols, new->old_blocks,
2044 new->start_addr, valu, objfile);
2049 /* This is the outermost LBRAC...RBRAC pair. There is no
2050 need to do anything; leave the symbols that preceded it
2051 to be attached to the function's own block. We need to
2052 indicate that we just moved outside of the function. */
2053 within_function = 0;
2056 if (VARIABLES_INSIDE_BLOCK (desc, processing_gcc_compilation))
2057 /* Now pop locals of block just finished. */
2058 local_symbols = new->locals;
2063 /* This kind of symbol indicates the start of an object file. */
2064 /* Relocate for dynamic loading */
2065 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2069 /* This type of symbol indicates the start of data
2070 for one source file.
2071 Finish the symbol table of the previous source file
2072 (if any) and start accumulating a new symbol table. */
2073 /* Relocate for dynamic loading */
2074 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2078 #ifdef SUN_FIXED_LBRAC_BUG
2079 last_pc_address = valu; /* Save for SunOS bug circumcision */
2082 #ifdef PCC_SOL_BROKEN
2083 /* pcc bug, occasionally puts out SO for SOL. */
2084 if (context_stack_depth > 0)
2086 start_subfile (name, NULL);
2090 if (last_source_file)
2092 /* Check if previous symbol was also an N_SO (with some
2093 sanity checks). If so, that one was actually the directory
2094 name, and the current one is the real file name.
2096 if (previous_stab_code == (unsigned char) N_SO)
2098 patch_subfile_names (current_subfile, name);
2099 break; /* Ignore repeated SOs */
2101 end_symtab (valu, objfile, SECT_OFF_TEXT (objfile));
2105 /* Null name means this just marks the end of text for this .o file.
2106 Don't start a new symtab in this case. */
2107 if (*name == '\000')
2110 if (block_address_function_relative)
2111 function_start_offset = 0;
2114 start_symtab (name, NULL, valu);
2115 record_debugformat ("stabs");
2119 /* This type of symbol indicates the start of data for
2120 a sub-source-file, one whose contents were copied or
2121 included in the compilation of the main source file
2122 (whose name was given in the N_SO symbol.) */
2123 /* Relocate for dynamic loading */
2124 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2125 start_subfile (name, current_subfile->dirname);
2130 add_new_header_file (name, valu);
2131 start_subfile (name, current_subfile->dirname);
2135 start_subfile (pop_subfile (), current_subfile->dirname);
2139 add_old_header_file (name, valu);
2143 /* This type of "symbol" really just records
2144 one line-number -- core-address correspondence.
2145 Enter it in the line list for this symbol table. */
2147 /* Relocate for dynamic loading and for ELF acc fn-relative syms. */
2148 valu += function_start_offset;
2150 #ifdef SUN_FIXED_LBRAC_BUG
2151 last_pc_address = valu; /* Save for SunOS bug circumcision */
2153 record_line (current_subfile, desc, valu);
2157 common_block_start (name, objfile);
2161 common_block_end (objfile);
2164 /* The following symbol types need to have the appropriate offset added
2165 to their value; then we process symbol definitions in the name. */
2167 case N_STSYM: /* Static symbol in data seg */
2168 case N_LCSYM: /* Static symbol in BSS seg */
2169 case N_ROSYM: /* Static symbol in Read-only data seg */
2170 /* HORRID HACK DEPT. However, it's Sun's furgin' fault.
2171 Solaris2's stabs-in-elf makes *most* symbols relative
2172 but leaves a few absolute (at least for Solaris 2.1 and version
2173 2.0.1 of the SunPRO compiler). N_STSYM and friends sit on the fence.
2174 .stab "foo:S...",N_STSYM is absolute (ld relocates it)
2175 .stab "foo:V...",N_STSYM is relative (section base subtracted).
2176 This leaves us no choice but to search for the 'S' or 'V'...
2177 (or pass the whole section_offsets stuff down ONE MORE function
2178 call level, which we really don't want to do). */
2182 /* .o files and NLMs have non-zero text seg offsets, but don't need
2183 their static syms offset in this fashion. XXX - This is really a
2184 crock that should be fixed in the solib handling code so that I
2185 don't have to work around it here. */
2187 if (!symfile_relocatable)
2189 p = strchr (name, ':');
2190 if (p != 0 && p[1] == 'S')
2192 /* The linker relocated it. We don't want to add an
2193 elfstab_offset_sections-type offset, but we *do* want
2194 to add whatever solib.c passed to symbol_file_add as
2195 addr (this is known to affect SunOS4, and I suspect ELF
2196 too). Since elfstab_offset_sections currently does not
2197 muck with the text offset (there is no Ttext.text
2198 symbol), we can get addr from the text offset. If
2199 elfstab_offset_sections ever starts dealing with the
2200 text offset, and we still need to do this, we need to
2201 invent a SECT_OFF_ADDR_KLUDGE or something. */
2202 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2203 goto define_a_symbol;
2206 /* Since it's not the kludge case, re-dispatch to the right handler. */
2216 internal_error (__FILE__, __LINE__, "failed internal consistency check");
2220 case_N_STSYM: /* Static symbol in data seg */
2221 case N_DSLINE: /* Source line number, data seg */
2222 valu += ANOFFSET (section_offsets, SECT_OFF_DATA (objfile));
2223 goto define_a_symbol;
2225 case_N_LCSYM: /* Static symbol in BSS seg */
2226 case N_BSLINE: /* Source line number, bss seg */
2227 /* N_BROWS: overlaps with N_BSLINE */
2228 valu += ANOFFSET (section_offsets, SECT_OFF_BSS (objfile));
2229 goto define_a_symbol;
2231 case_N_ROSYM: /* Static symbol in Read-only data seg */
2232 valu += ANOFFSET (section_offsets, SECT_OFF_RODATA (objfile));
2233 goto define_a_symbol;
2235 case N_ENTRY: /* Alternate entry point */
2236 /* Relocate for dynamic loading */
2237 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2238 goto define_a_symbol;
2240 /* The following symbol types we don't know how to process. Handle
2241 them in a "default" way, but complain to people who care. */
2243 case N_CATCH: /* Exception handler catcher */
2244 case N_EHDECL: /* Exception handler name */
2245 case N_PC: /* Global symbol in Pascal */
2246 case N_M2C: /* Modula-2 compilation unit */
2247 /* N_MOD2: overlaps with N_EHDECL */
2248 case N_SCOPE: /* Modula-2 scope information */
2249 case N_ECOML: /* End common (local name) */
2250 case N_NBTEXT: /* Gould Non-Base-Register symbols??? */
2255 complain (&unknown_symtype_complaint, local_hex_string (type));
2258 /* The following symbol types don't need the address field relocated,
2259 since it is either unused, or is absolute. */
2261 case N_GSYM: /* Global variable */
2262 case N_NSYMS: /* Number of symbols (ultrix) */
2263 case N_NOMAP: /* No map? (ultrix) */
2264 case N_RSYM: /* Register variable */
2265 case N_DEFD: /* Modula-2 GNU module dependency */
2266 case N_SSYM: /* Struct or union element */
2267 case N_LSYM: /* Local symbol in stack */
2268 case N_PSYM: /* Parameter variable */
2269 case N_LENG: /* Length of preceding symbol type */
2273 char *colon_pos = strchr (name, ':');
2274 if (colon_pos == NULL)
2277 deftype = colon_pos[1];
2283 function_stab_type = type;
2285 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
2286 /* Deal with the SunPRO 3.0 compiler which omits the address
2287 from N_FUN symbols. */
2289 && valu == ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile)))
2291 CORE_ADDR minsym_valu =
2292 find_stab_function_addr (name, last_source_file, objfile);
2294 /* find_stab_function_addr will return 0 if the minimal
2295 symbol wasn't found. (Unfortunately, this might also
2296 be a valid address.) Anyway, if it *does* return 0,
2297 it is likely that the value was set correctly to begin
2299 if (minsym_valu != 0)
2304 #ifdef SUN_FIXED_LBRAC_BUG
2305 /* The Sun acc compiler, under SunOS4, puts out
2306 functions with N_GSYM or N_STSYM. The problem is
2307 that the address of the symbol is no good (for N_GSYM
2308 it doesn't even attept an address; for N_STSYM it
2309 puts out an address but then it gets relocated
2310 relative to the data segment, not the text segment).
2311 Currently we can't fix this up later as we do for
2312 some types of symbol in scan_file_globals.
2313 Fortunately we do have a way of finding the address -
2314 we know that the value in last_pc_address is either
2315 the one we want (if we're dealing with the first
2316 function in an object file), or somewhere in the
2317 previous function. This means that we can use the
2318 minimal symbol table to get the address. */
2320 /* Starting with release 3.0, the Sun acc compiler,
2321 under SunOS4, puts out functions with N_FUN and a value
2322 of zero. This gets relocated to the start of the text
2323 segment of the module, which is no good either.
2324 Under SunOS4 we can deal with this as N_SLINE and N_SO
2325 entries contain valid absolute addresses.
2326 Release 3.0 acc also puts out N_OPT entries, which makes
2327 it possible to discern acc from cc or gcc. */
2329 if (type == N_GSYM || type == N_STSYM
2331 && n_opt_found && !block_address_function_relative))
2333 struct minimal_symbol *m;
2334 int l = colon_pos - name;
2336 m = lookup_minimal_symbol_by_pc (last_pc_address);
2337 if (m && STREQN (SYMBOL_NAME (m), name, l)
2338 && SYMBOL_NAME (m)[l] == '\0')
2339 /* last_pc_address was in this function */
2340 valu = SYMBOL_VALUE (m);
2341 else if (m && SYMBOL_NAME (m + 1)
2342 && STREQN (SYMBOL_NAME (m + 1), name, l)
2343 && SYMBOL_NAME (m + 1)[l] == '\0')
2344 /* last_pc_address was in last function */
2345 valu = SYMBOL_VALUE (m + 1);
2347 /* Not found - use last_pc_address (for finish_block) */
2348 valu = last_pc_address;
2351 last_pc_address = valu; /* Save for SunOS bug circumcision */
2354 if (block_address_function_relative)
2355 /* For Solaris 2.0 compilers, the block addresses and
2356 N_SLINE's are relative to the start of the
2357 function. On normal systems, and when using gcc on
2358 Solaris 2.0, these addresses are just absolute, or
2359 relative to the N_SO, depending on
2360 BLOCK_ADDRESS_ABSOLUTE. */
2361 function_start_offset = valu;
2363 within_function = 1;
2365 if (context_stack_depth > 1)
2367 complain (&lbrac_unmatched_complaint, symnum);
2371 if (context_stack_depth > 0)
2373 new = pop_context ();
2374 /* Make a block for the local symbols within. */
2375 finish_block (new->name, &local_symbols, new->old_blocks,
2376 new->start_addr, valu, objfile);
2379 new = push_context (0, valu);
2380 new->name = define_symbol (valu, name, desc, type, objfile);
2384 define_symbol (valu, name, desc, type, objfile);
2390 /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it
2391 for a bunch of other flags, too. Someday we may parse their
2392 flags; for now we ignore theirs and hope they'll ignore ours. */
2393 case N_OPT: /* Solaris 2: Compiler options */
2396 if (STREQ (name, GCC2_COMPILED_FLAG_SYMBOL))
2398 processing_gcc_compilation = 2;
2399 #if 0 /* Works, but is experimental. -fnf */
2400 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
2401 know whether it will use the old style or v3 mangling. */
2402 if (AUTO_DEMANGLING)
2404 set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
2413 case N_MAIN: /* Name of main routine. */
2414 /* FIXME: If one has a symbol file with N_MAIN and then replaces
2415 it with a symbol file with "main" and without N_MAIN. I'm
2416 not sure exactly what rule to follow but probably something
2417 like: N_MAIN takes precedence over "main" no matter what
2418 objfile it is in; If there is more than one N_MAIN, choose
2419 the one in the symfile_objfile; If there is more than one
2420 N_MAIN within a given objfile, complain() and choose
2421 arbitrarily. (kingdon) */
2423 set_main_name (name);
2426 /* The following symbol types can be ignored. */
2427 case N_OBJ: /* Solaris 2: Object file dir and name */
2428 /* N_UNDF: Solaris 2: file separator mark */
2429 /* N_UNDF: -- we will never encounter it, since we only process one
2430 file's symbols at once. */
2431 case N_ENDM: /* Solaris 2: End of module */
2432 case N_ALIAS: /* SunPro F77: alias name, ignore for now. */
2436 /* '#' is a GNU C extension to allow one symbol to refer to another
2439 Generally this is used so that an alias can refer to its main
2443 /* Initialize symbol reference names and determine if this is
2444 a definition. If symbol reference is being defined, go
2445 ahead and add it. Otherwise, just return sym. */
2450 /* If this stab defines a new reference ID that is not on the
2451 reference list, then put it on the reference list.
2453 We go ahead and advance NAME past the reference, even though
2454 it is not strictly necessary at this time. */
2455 refnum = symbol_reference_defined (&s);
2457 if (!ref_search (refnum))
2458 ref_add (refnum, 0, name, valu);
2463 previous_stab_code = type;
2466 /* FIXME: The only difference between this and elfstab_build_psymtabs
2467 is the call to install_minimal_symbols for elf, and the support for
2468 split sections. If the differences are really that small, the code
2469 should be shared. */
2471 /* Scan and build partial symbols for an coff symbol file.
2472 The coff file has already been processed to get its minimal symbols.
2474 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
2477 OBJFILE is the object file we are reading symbols from.
2478 ADDR is the address relative to which the symbols are (e.g.
2479 the base address of the text segment).
2480 MAINLINE is true if we are reading the main symbol
2481 table (as opposed to a shared lib or dynamically loaded file).
2482 TEXTADDR is the address of the text section.
2483 TEXTSIZE is the size of the text section.
2484 STABSECTS is the list of .stab sections in OBJFILE.
2485 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
2486 .stabstr section exists.
2488 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
2489 adjusted for coff details. */
2492 coffstab_build_psymtabs (struct objfile *objfile, int mainline,
2493 CORE_ADDR textaddr, unsigned int textsize,
2494 struct stab_section_list *stabsects,
2495 file_ptr stabstroffset, unsigned int stabstrsize)
2498 bfd *sym_bfd = objfile->obfd;
2499 char *name = bfd_get_filename (sym_bfd);
2500 struct dbx_symfile_info *info;
2501 unsigned int stabsize;
2503 /* There is already a dbx_symfile_info allocated by our caller.
2504 It might even contain some info from the coff symtab to help us. */
2505 info = objfile->sym_stab_info;
2507 DBX_TEXT_ADDR (objfile) = textaddr;
2508 DBX_TEXT_SIZE (objfile) = textsize;
2510 #define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
2511 DBX_SYMBOL_SIZE (objfile) = COFF_STABS_SYMBOL_SIZE;
2512 DBX_STRINGTAB_SIZE (objfile) = stabstrsize;
2514 if (stabstrsize > bfd_get_size (sym_bfd))
2515 error ("ridiculous string table size: %d bytes", stabstrsize);
2516 DBX_STRINGTAB (objfile) = (char *)
2517 obstack_alloc (&objfile->psymbol_obstack, stabstrsize + 1);
2518 OBJSTAT (objfile, sz_strtab += stabstrsize + 1);
2520 /* Now read in the string table in one big gulp. */
2522 val = bfd_seek (sym_bfd, stabstroffset, SEEK_SET);
2524 perror_with_name (name);
2525 val = bfd_bread (DBX_STRINGTAB (objfile), stabstrsize, sym_bfd);
2526 if (val != stabstrsize)
2527 perror_with_name (name);
2529 stabsread_new_init ();
2530 buildsym_new_init ();
2531 free_header_files ();
2532 init_header_files ();
2534 processing_acc_compilation = 1;
2536 /* In a coff file, we've already installed the minimal symbols that came
2537 from the coff (non-stab) symbol table, so always act like an
2538 incremental load here. */
2539 if (stabsects->next == NULL)
2541 stabsize = bfd_section_size (sym_bfd, stabsects->section);
2542 DBX_SYMCOUNT (objfile) = stabsize / DBX_SYMBOL_SIZE (objfile);
2543 DBX_SYMTAB_OFFSET (objfile) = stabsects->section->filepos;
2547 struct stab_section_list *stabsect;
2549 DBX_SYMCOUNT (objfile) = 0;
2550 for (stabsect = stabsects; stabsect != NULL; stabsect = stabsect->next)
2552 stabsize = bfd_section_size (sym_bfd, stabsect->section);
2553 DBX_SYMCOUNT (objfile) += stabsize / DBX_SYMBOL_SIZE (objfile);
2556 DBX_SYMTAB_OFFSET (objfile) = stabsects->section->filepos;
2558 symbuf_sections = stabsects->next;
2559 symbuf_left = bfd_section_size (sym_bfd, stabsects->section);
2563 dbx_symfile_read (objfile, 0);
2566 /* Scan and build partial symbols for an ELF symbol file.
2567 This ELF file has already been processed to get its minimal symbols,
2568 and any DWARF symbols that were in it.
2570 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
2573 OBJFILE is the object file we are reading symbols from.
2574 ADDR is the address relative to which the symbols are (e.g.
2575 the base address of the text segment).
2576 MAINLINE is true if we are reading the main symbol
2577 table (as opposed to a shared lib or dynamically loaded file).
2578 STABOFFSET and STABSIZE define the location in OBJFILE where the .stab
2580 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
2581 .stabstr section exists.
2583 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
2584 adjusted for elf details. */
2587 elfstab_build_psymtabs (struct objfile *objfile, int mainline,
2588 file_ptr staboffset, unsigned int stabsize,
2589 file_ptr stabstroffset, unsigned int stabstrsize)
2592 bfd *sym_bfd = objfile->obfd;
2593 char *name = bfd_get_filename (sym_bfd);
2594 struct dbx_symfile_info *info;
2596 /* There is already a dbx_symfile_info allocated by our caller.
2597 It might even contain some info from the ELF symtab to help us. */
2598 info = objfile->sym_stab_info;
2600 /* Find the first and last text address. dbx_symfile_read seems to
2602 find_text_range (sym_bfd, objfile);
2604 #define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
2605 DBX_SYMBOL_SIZE (objfile) = ELF_STABS_SYMBOL_SIZE;
2606 DBX_SYMCOUNT (objfile) = stabsize / DBX_SYMBOL_SIZE (objfile);
2607 DBX_STRINGTAB_SIZE (objfile) = stabstrsize;
2608 DBX_SYMTAB_OFFSET (objfile) = staboffset;
2610 if (stabstrsize > bfd_get_size (sym_bfd))
2611 error ("ridiculous string table size: %d bytes", stabstrsize);
2612 DBX_STRINGTAB (objfile) = (char *)
2613 obstack_alloc (&objfile->psymbol_obstack, stabstrsize + 1);
2614 OBJSTAT (objfile, sz_strtab += stabstrsize + 1);
2616 /* Now read in the string table in one big gulp. */
2618 val = bfd_seek (sym_bfd, stabstroffset, SEEK_SET);
2620 perror_with_name (name);
2621 val = bfd_bread (DBX_STRINGTAB (objfile), stabstrsize, sym_bfd);
2622 if (val != stabstrsize)
2623 perror_with_name (name);
2625 stabsread_new_init ();
2626 buildsym_new_init ();
2627 free_header_files ();
2628 init_header_files ();
2629 install_minimal_symbols (objfile);
2631 processing_acc_compilation = 1;
2633 /* In an elf file, we've already installed the minimal symbols that came
2634 from the elf (non-stab) symbol table, so always act like an
2635 incremental load here. */
2636 dbx_symfile_read (objfile, 0);
2639 /* Scan and build partial symbols for a file with special sections for stabs
2640 and stabstrings. The file has already been processed to get its minimal
2641 symbols, and any other symbols that might be necessary to resolve GSYMs.
2643 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
2646 OBJFILE is the object file we are reading symbols from.
2647 ADDR is the address relative to which the symbols are (e.g. the base address
2648 of the text segment).
2649 MAINLINE is true if we are reading the main symbol table (as opposed to a
2650 shared lib or dynamically loaded file).
2651 STAB_NAME is the name of the section that contains the stabs.
2652 STABSTR_NAME is the name of the section that contains the stab strings.
2654 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read. */
2657 stabsect_build_psymtabs (struct objfile *objfile, int mainline, char *stab_name,
2658 char *stabstr_name, char *text_name)
2661 bfd *sym_bfd = objfile->obfd;
2662 char *name = bfd_get_filename (sym_bfd);
2664 asection *stabstrsect;
2665 asection *text_sect;
2667 stabsect = bfd_get_section_by_name (sym_bfd, stab_name);
2668 stabstrsect = bfd_get_section_by_name (sym_bfd, stabstr_name);
2674 error ("stabsect_build_psymtabs: Found stabs (%s), but not string section (%s)",
2675 stab_name, stabstr_name);
2677 objfile->sym_stab_info = (struct dbx_symfile_info *)
2678 xmalloc (sizeof (struct dbx_symfile_info));
2679 memset (objfile->sym_stab_info, 0, sizeof (struct dbx_symfile_info));
2681 text_sect = bfd_get_section_by_name (sym_bfd, text_name);
2683 error ("Can't find %s section in symbol file", text_name);
2684 DBX_TEXT_ADDR (objfile) = bfd_section_vma (sym_bfd, text_sect);
2685 DBX_TEXT_SIZE (objfile) = bfd_section_size (sym_bfd, text_sect);
2687 DBX_SYMBOL_SIZE (objfile) = sizeof (struct external_nlist);
2688 DBX_SYMCOUNT (objfile) = bfd_section_size (sym_bfd, stabsect)
2689 / DBX_SYMBOL_SIZE (objfile);
2690 DBX_STRINGTAB_SIZE (objfile) = bfd_section_size (sym_bfd, stabstrsect);
2691 DBX_SYMTAB_OFFSET (objfile) = stabsect->filepos; /* XXX - FIXME: POKING INSIDE BFD DATA STRUCTURES */
2693 if (DBX_STRINGTAB_SIZE (objfile) > bfd_get_size (sym_bfd))
2694 error ("ridiculous string table size: %d bytes", DBX_STRINGTAB_SIZE (objfile));
2695 DBX_STRINGTAB (objfile) = (char *)
2696 obstack_alloc (&objfile->psymbol_obstack, DBX_STRINGTAB_SIZE (objfile) + 1);
2697 OBJSTAT (objfile, sz_strtab += DBX_STRINGTAB_SIZE (objfile) + 1);
2699 /* Now read in the string table in one big gulp. */
2701 val = bfd_get_section_contents (sym_bfd, /* bfd */
2702 stabstrsect, /* bfd section */
2703 DBX_STRINGTAB (objfile), /* input buffer */
2704 0, /* offset into section */
2705 DBX_STRINGTAB_SIZE (objfile)); /* amount to read */
2708 perror_with_name (name);
2710 stabsread_new_init ();
2711 buildsym_new_init ();
2712 free_header_files ();
2713 init_header_files ();
2714 install_minimal_symbols (objfile);
2716 /* Now, do an incremental load */
2718 processing_acc_compilation = 1;
2719 dbx_symfile_read (objfile, 0);
2722 static struct sym_fns aout_sym_fns =
2724 bfd_target_aout_flavour,
2725 dbx_new_init, /* sym_new_init: init anything gbl to entire symtab */
2726 dbx_symfile_init, /* sym_init: read initial info, setup for sym_read() */
2727 dbx_symfile_read, /* sym_read: read a symbol file into symtab */
2728 dbx_symfile_finish, /* sym_finish: finished with file, cleanup */
2729 default_symfile_offsets, /* sym_offsets: parse user's offsets to internal form */
2730 NULL /* next: pointer to next struct sym_fns */
2734 _initialize_dbxread (void)
2736 add_symtab_fns (&aout_sym_fns);