1 /* Read os9/os9k symbol tables and convert to internal format, for GDB.
2 Copyright 1986, 87, 88, 89, 90, 91, 92, 93, 94, 96, 1998
3 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21 /* This module provides three functions: os9k_symfile_init,
22 which initializes to read a symbol file; os9k_new_init, which
23 discards existing cached information when all symbols are being
24 discarded; and os9k_symfile_read, which reads a symbol table
27 os9k_symfile_read only does the minimum work necessary for letting the
28 user "name" things symbolically; it does not read the entire symtab.
29 Instead, it reads the external and static symbols and puts them in partial
30 symbol tables. When more extensive information is requested of a
31 file, the corresponding partial symbol table is mutated into a full
32 fledged symbol table by going back and reading the symbols
33 for real. os9k_psymtab_to_symtab() is the function that does this */
36 #include "gdb_string.h"
39 #if defined(USG) || defined(__CYGNUSCLIB__)
40 #include <sys/types.h>
48 #include "breakpoint.h"
51 #include "gdbcore.h" /* for bfd stuff */
52 #include "libaout.h" /* FIXME Secret internal BFD stuff for a.out */
56 #include "gdb-stabs.h"
58 #include "language.h" /* Needed inside partial-stab.h */
59 #include "complaints.h"
61 #include "stabsread.h"
63 /* Each partial symbol table entry contains a pointer to private data for the
64 read_symtab() function to use when expanding a partial symbol table entry
65 to a full symbol table entry.
67 For dbxread this structure contains the offset within the file symbol table
68 of first local symbol for this file, and count of the section
69 of the symbol table devoted to this file's symbols (actually, the section
70 bracketed may contain more than just this file's symbols). It also contains
71 further information needed to locate the symbols if they are in an ELF file.
73 If ldsymcnt is 0, the only reason for this thing's existence is the
74 dependency list. Nothing else will happen when it is read in. */
76 #define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff)
77 #define LDSYMCNT(p) (((struct symloc *)((p)->read_symtab_private))->ldsymnum)
84 /* Remember what we deduced to be the source language of this psymtab. */
85 static enum language psymtab_language = language_unknown;
87 /* keep partial symbol table file nested depth */
88 static int psymfile_depth = 0;
90 /* keep symbol table file nested depth */
91 static int symfile_depth = 0;
93 /* Nonzero means give verbose info on gdb action. From main.c. */
94 extern int info_verbose;
96 extern int previous_stab_code;
98 /* Name of last function encountered. Used in Solaris to approximate
99 object file boundaries. */
100 static char *last_function_name;
102 /* Complaints about the symbols we have encountered. */
103 extern struct complaint lbrac_complaint;
105 extern struct complaint unknown_symtype_complaint;
107 extern struct complaint unknown_symchar_complaint;
109 extern struct complaint lbrac_rbrac_complaint;
111 extern struct complaint repeated_header_complaint;
113 extern struct complaint repeated_header_name_complaint;
116 static struct complaint lbrac_unmatched_complaint =
117 {"unmatched Increment Block Entry before symtab pos %d", 0, 0};
119 static struct complaint lbrac_mismatch_complaint =
120 {"IBE/IDE symbol mismatch at symtab pos %d", 0, 0};
123 /* Local function prototypes */
126 read_minimal_symbols PARAMS ((struct objfile *, struct section_offsets *));
129 os9k_read_ofile_symtab PARAMS ((struct partial_symtab *));
132 os9k_psymtab_to_symtab PARAMS ((struct partial_symtab *));
135 os9k_psymtab_to_symtab_1 PARAMS ((struct partial_symtab *));
138 read_os9k_psymtab PARAMS ((struct section_offsets *, struct objfile *,
142 fill_sym PARAMS ((FILE *, bfd *));
145 os9k_symfile_init PARAMS ((struct objfile *));
148 os9k_new_init PARAMS ((struct objfile *));
151 os9k_symfile_read PARAMS ((struct objfile *, struct section_offsets *, int));
154 os9k_symfile_finish PARAMS ((struct objfile *));
157 os9k_process_one_symbol PARAMS ((int, int, CORE_ADDR, char *,
158 struct section_offsets *, struct objfile *));
160 static struct partial_symtab *
161 os9k_start_psymtab PARAMS ((struct objfile *, struct section_offsets *, char *,
162 CORE_ADDR, int, int, struct partial_symbol **,
163 struct partial_symbol **));
165 static struct partial_symtab *
166 os9k_end_psymtab PARAMS ((struct partial_symtab *, char **, int, int, CORE_ADDR,
167 struct partial_symtab **, int));
170 record_minimal_symbol PARAMS ((char *, CORE_ADDR, int, struct objfile *,
171 struct section_offsets *));
173 #define HANDLE_RBRAC(val) \
174 if ((val) > pst->texthigh) pst->texthigh = (val);
176 #define SWAP_STBHDR(hdrp, abfd) \
178 (hdrp)->fmtno = bfd_get_16(abfd, (unsigned char *)&(hdrp)->fmtno); \
179 (hdrp)->crc = bfd_get_32(abfd, (unsigned char *)&(hdrp)->crc); \
180 (hdrp)->offset = bfd_get_32(abfd, (unsigned char *)&(hdrp)->offset); \
181 (hdrp)->nsym = bfd_get_32(abfd, (unsigned char *)&(hdrp)->nsym); \
183 #define SWAP_STBSYM(symp, abfd) \
185 (symp)->value = bfd_get_32(abfd, (unsigned char *)&(symp)->value); \
186 (symp)->type = bfd_get_16(abfd, (unsigned char *)&(symp)->type); \
187 (symp)->stroff = bfd_get_32(abfd, (unsigned char *)&(symp)->stroff); \
197 record_minimal_symbol (name, address, type, objfile, section_offsets)
201 struct objfile *objfile;
202 struct section_offsets *section_offsets;
204 enum minimal_symbol_type ms_type;
210 address += ANOFFSET(section_offsets, SECT_OFF_TEXT);
228 ms_type = mst_unknown; break;
231 prim_record_minimal_symbol (name, address, ms_type, objfile);
234 /* read and process .stb file and store in minimal symbol table */
235 typedef char mhhdr[80];
250 #define STBSYMSIZE 10
253 read_minimal_symbols(objfile, section_offsets)
254 struct objfile *objfile;
255 struct section_offsets *section_offsets;
260 struct stbsymbol sym;
262 char buf[64], buf1[128];
265 if (fp == NULL) return;
266 abfd = objfile->obfd;
267 fread(&hdr.comhdr[0], sizeof(mhhdr), 1, fp);
276 if (i%2) ch=getc(fp);
279 fread(&hdr.fmtno, sizeof(hdr.fmtno), 1, fp);
280 fread(&hdr.crc, sizeof(hdr.crc), 1, fp);
281 fread(&hdr.offset, sizeof(hdr.offset), 1, fp);
282 fread(&hdr.nsym, sizeof(hdr.nsym), 1, fp);
283 SWAP_STBHDR(&hdr, abfd);
286 init_minimal_symbol_collection();
288 for (i = hdr.nsym; i > 0; i--) {
289 fseek(fp, (long)off, 0);
290 fread(&sym.value, sizeof(sym.value), 1, fp);
291 fread(&sym.type, sizeof(sym.type), 1, fp);
292 fread(&sym.stroff, sizeof(sym.stroff), 1, fp);
293 SWAP_STBSYM (&sym, abfd);
294 fseek(fp, (long)sym.stroff, 0);
303 record_minimal_symbol(buf1, sym.value, sym.type&7, objfile, section_offsets);
306 install_minimal_symbols (objfile);
310 /* Scan and build partial symbols for a symbol file.
311 We have been initialized by a call to os9k_symfile_init, which
312 put all the relevant info into a "struct os9k_symfile_info",
313 hung off the objfile structure.
315 SECTION_OFFSETS contains offsets relative to which the symbols in the
316 various sections are (depending where the sections were actually loaded).
317 MAINLINE is true if we are reading the main symbol
318 table (as opposed to a shared lib or dynamically loaded file). */
321 os9k_symfile_read (objfile, section_offsets, mainline)
322 struct objfile *objfile;
323 struct section_offsets *section_offsets;
324 int mainline; /* FIXME comments above */
327 struct cleanup *back_to;
329 sym_bfd = objfile->obfd;
330 /* If we are reinitializing, or if we have never loaded syms yet, init */
331 if (mainline || objfile->global_psymbols.size == 0 ||
332 objfile->static_psymbols.size == 0)
333 init_psymbol_list (objfile, DBX_SYMCOUNT (objfile));
335 free_pending_blocks ();
336 back_to = make_cleanup ((make_cleanup_func) really_free_pendings, 0);
338 make_cleanup ((make_cleanup_func) discard_minimal_symbols, 0);
339 read_minimal_symbols (objfile, section_offsets);
341 /* Now that the symbol table data of the executable file are all in core,
342 process them and define symbols accordingly. */
343 read_os9k_psymtab (section_offsets, objfile,
344 DBX_TEXT_ADDR (objfile),
345 DBX_TEXT_SIZE (objfile));
347 do_cleanups (back_to);
350 /* Initialize anything that needs initializing when a completely new
351 symbol file is specified (not just adding some symbols from another
352 file, e.g. a shared library). */
355 os9k_new_init (ignore)
356 struct objfile *ignore;
358 stabsread_new_init ();
359 buildsym_new_init ();
362 init_header_files ();
366 /* os9k_symfile_init ()
367 It is passed a struct objfile which contains, among other things,
368 the BFD for the file whose symbols are being read, and a slot for a pointer
369 to "private data" which we fill with goodies.
371 Since BFD doesn't know how to read debug symbols in a format-independent
372 way (and may never do so...), we have to do it ourselves. We will never
373 be called unless this is an a.out (or very similar) file.
374 FIXME, there should be a cleaner peephole into the BFD environment here. */
377 os9k_symfile_init (objfile)
378 struct objfile *objfile;
380 bfd *sym_bfd = objfile->obfd;
381 char *name = bfd_get_filename (sym_bfd);
382 char dbgname[512], stbname[512];
387 strcpy(dbgname, name);
388 strcat(dbgname, ".dbg");
389 strcpy(stbname, name);
390 strcat(stbname, ".stb");
392 if ((symfile = fopen(dbgname, "r")) == NULL) {
393 warning("Symbol file %s not found", dbgname);
395 objfile->auxf2 = symfile;
397 if ((minfile = fopen(stbname, "r")) == NULL) {
398 warning("Symbol file %s not found", stbname);
400 objfile->auxf1 = minfile;
402 /* Allocate struct to keep track of the symfile */
403 objfile->sym_stab_info = (struct dbx_symfile_info *)
404 xmmalloc (objfile -> md, sizeof (struct dbx_symfile_info));
405 DBX_SYMFILE_INFO (objfile)->stab_section_info = NULL;
407 text_sect = bfd_get_section_by_name (sym_bfd, ".text");
409 error ("Can't find .text section in file");
410 DBX_TEXT_ADDR (objfile) = bfd_section_vma (sym_bfd, text_sect);
411 DBX_TEXT_SIZE (objfile) = bfd_section_size (sym_bfd, text_sect);
413 DBX_SYMBOL_SIZE (objfile) = 0; /* variable size symbol */
414 DBX_SYMCOUNT (objfile) = 0; /* used to be bfd_get_symcount(sym_bfd) */
415 DBX_SYMTAB_OFFSET (objfile) = 0; /* used to be SYMBOL_TABLE_OFFSET */
418 /* Perform any local cleanups required when we are done with a particular
419 objfile. I.E, we are in the process of discarding all symbol information
420 for an objfile, freeing up all memory held for it, and unlinking the
421 objfile struct from the global list of known objfiles. */
424 os9k_symfile_finish (objfile)
425 struct objfile *objfile;
427 if (objfile->sym_stab_info != NULL)
429 mfree (objfile -> md, objfile->sym_stab_info);
432 free_header_files ();
444 #define SYNC (int)0xefbefeca
446 #define SWAP_DBGHDR(hdrp, abfd) \
448 (hdrp)->sync = bfd_get_32(abfd, (unsigned char *)&(hdrp)->sync); \
449 (hdrp)->rev = bfd_get_16(abfd, (unsigned char *)&(hdrp)->rev); \
450 (hdrp)->crc = bfd_get_32(abfd, (unsigned char *)&(hdrp)->crc); \
451 (hdrp)->os = bfd_get_16(abfd, (unsigned char *)&(hdrp)->os); \
452 (hdrp)->cpu = bfd_get_16(abfd, (unsigned char *)&(hdrp)->cpu); \
455 #define N_SYM_CMPLR 0
456 #define N_SYM_SLINE 1
458 #define N_SYM_LBRAC 3
459 #define N_SYM_RBRAC 4
462 struct internal_symstruct {
468 static struct internal_symstruct symbol;
469 static struct internal_symstruct *symbuf = &symbol;
470 static char strbuf[4096];
471 static struct st_dbghdr dbghdr;
472 static short cmplrid;
474 #define VER_PRE_ULTRAC ((short)4)
475 #define VER_ULTRAC ((short)5)
478 fill_sym (dbg_file, abfd)
487 int nbytes = fread(&si, sizeof(si), 1, dbg_file);
491 perror_with_name ("reading .dbg file.");
494 symbuf->n_strx = NULL;
495 symbuf->n_type = bfd_get_16 (abfd, (unsigned char *)&si);
496 symbuf->n_type = 0xf & symbuf->n_type;
497 switch (symbuf->n_type)
500 fread(&si, sizeof(si), 1, dbg_file);
501 symbuf->n_desc = bfd_get_16(abfd, (unsigned char *)&si);
502 cmplrid = symbuf->n_desc & 0xff;
505 fread(&li, sizeof(li), 1, dbg_file);
506 symbuf->n_value = bfd_get_32(abfd, (unsigned char *)&li);
507 fread(&li, sizeof(li), 1, dbg_file);
508 li = bfd_get_32(abfd, (unsigned char *)&li);
509 symbuf->n_strx = (char *)(li >> 12);
510 symbuf->n_desc = li & 0xfff;
513 fread(&li, sizeof(li), 1, dbg_file);
514 symbuf->n_value = bfd_get_32(abfd, (unsigned char *)&li);
518 strbuf[si++] = (char) ii;
519 } while (ii != 0 || si % 2 != 0);
520 symbuf->n_strx = strbuf;
521 p = (char *) strchr (strbuf, ':');
523 if ((p[1] == 'F' || p[1] == 'f') && cmplrid == VER_PRE_ULTRAC)
525 fread(&si, sizeof(si), 1, dbg_file);
526 nmask = bfd_get_16(abfd, (unsigned char *)&si);
527 for (ii=0; ii<nmask; ii++)
528 fread(&si, sizeof(si), 1, dbg_file);
532 fread(&li, sizeof(li), 1, dbg_file);
533 symbuf->n_value = bfd_get_32(abfd, (unsigned char *)&li);
536 fread(&li, sizeof(li), 1, dbg_file);
537 symbuf->n_value = bfd_get_32(abfd, (unsigned char *)&li);
545 /* Given pointers to an a.out symbol table in core containing dbx
546 style data, setup partial_symtab's describing each source file for
547 which debugging information is available.
548 SYMFILE_NAME is the name of the file we are reading from
549 and SECTION_OFFSETS is the set of offsets for the various sections
550 of the file (a set of zeros if the mainline program). */
553 read_os9k_psymtab (section_offsets, objfile, text_addr, text_size)
554 struct section_offsets *section_offsets;
555 struct objfile *objfile;
559 register struct internal_symstruct *bufp = 0; /* =0 avoids gcc -Wall glitch*/
560 register char *namestring;
561 int past_first_source_file = 0;
562 CORE_ADDR last_o_file_start = 0;
564 struct cleanup *back_to;
569 /* End of the text segment of the executable file. */
570 static CORE_ADDR end_of_text_addr;
572 /* Current partial symtab */
573 static struct partial_symtab *pst = 0;
575 /* List of current psymtab's include files */
576 char **psymtab_include_list;
577 int includes_allocated;
580 /* Index within current psymtab dependency list */
581 struct partial_symtab **dependency_list;
582 int dependencies_used, dependencies_allocated;
584 includes_allocated = 30;
586 psymtab_include_list = (char **) alloca (includes_allocated *
589 dependencies_allocated = 30;
590 dependencies_used = 0;
592 (struct partial_symtab **) alloca (dependencies_allocated *
593 sizeof (struct partial_symtab *));
595 last_source_file = NULL;
597 #ifdef END_OF_TEXT_DEFAULT
598 end_of_text_addr = END_OF_TEXT_DEFAULT;
600 end_of_text_addr = text_addr + section_offsets->offsets[SECT_OFF_TEXT]
601 + text_size; /* Relocate */
604 abfd = objfile->obfd;
608 fread(&dbghdr.sync, sizeof(dbghdr.sync), 1, fp);
609 fread(&dbghdr.rev, sizeof(dbghdr.rev), 1, fp);
610 fread(&dbghdr.crc, sizeof(dbghdr.crc), 1, fp);
611 fread(&dbghdr.os, sizeof(dbghdr.os), 1, fp);
612 fread(&dbghdr.cpu, sizeof(dbghdr.cpu), 1, fp);
613 SWAP_DBGHDR(&dbghdr, abfd);
621 /* Get the symbol for this run and pull out some info */
622 QUIT; /* allow this to be interruptable */
623 cursymoffset = ftell(objfile->auxf2);
624 ret = fill_sym(objfile->auxf2, abfd);
629 /* Special case to speed up readin. */
630 if (bufp->n_type == (short)N_SYM_SLINE) continue;
632 #define CUR_SYMBOL_VALUE bufp->n_value
635 switch (bufp->n_type)
643 CUR_SYMBOL_VALUE += ANOFFSET(section_offsets, SECT_OFF_TEXT);
644 if (psymfile_depth == 1 && pst)
646 os9k_end_psymtab (pst, psymtab_include_list, includes_used,
647 symnum, CUR_SYMBOL_VALUE,
648 dependency_list, dependencies_used);
649 pst = (struct partial_symtab *) 0;
651 dependencies_used = 0;
656 case N_SYM_SYM: /* Typedef or automatic variable. */
657 namestring = bufp->n_strx;
658 p = (char *) strchr (namestring, ':');
660 continue; /* Not a debugging symbol. */
662 /* Main processing section for debugging symbols which
663 the initial read through the symbol tables needs to worry
664 about. If we reach this point, the symbol which we are
665 considering is definitely one we are interested in.
666 p must also contain the (valid) index into the namestring
667 which indicates the debugging type symbol. */
674 enum language tmp_language;
678 valu = CUR_SYMBOL_VALUE;
680 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT);
681 past_first_source_file = 1;
683 p = strchr(namestring, ':');
684 if (p) n = p-namestring;
685 else n = strlen(namestring);
687 strncpy(str, namestring, n);
690 if (psymfile_depth == 0) {
692 pst = os9k_start_psymtab (objfile, section_offsets,
696 objfile -> global_psymbols.next,
697 objfile -> static_psymbols.next);
698 } else { /* this is a include file */
699 tmp_language = deduce_language_from_filename (str);
700 if (tmp_language != language_unknown
701 && (tmp_language != language_c
702 || psymtab_language != language_cplus))
703 psymtab_language = tmp_language;
706 if (pst && STREQ (str, pst->filename))
710 for (i = 0; i < includes_used; i++)
711 if (STREQ (str, psymtab_include_list[i]))
721 psymtab_include_list[includes_used++] = str;
722 if (includes_used >= includes_allocated)
724 char **orig = psymtab_include_list;
726 psymtab_include_list = (char **)
727 alloca ((includes_allocated *= 2) * sizeof (char *));
728 memcpy ((PTR)psymtab_include_list, (PTR)orig,
729 includes_used * sizeof (char *));
738 add_psymbol_to_list (namestring, p - namestring,
739 VAR_NAMESPACE, LOC_STATIC,
740 &objfile->static_psymbols,
742 psymtab_language, objfile);
745 add_psymbol_to_list (namestring, p - namestring,
746 VAR_NAMESPACE, LOC_STATIC,
747 &objfile->global_psymbols,
749 psymtab_language, objfile);
753 if (p != namestring) /* a name is there, not just :T... */
755 add_psymbol_to_list (namestring, p - namestring,
756 STRUCT_NAMESPACE, LOC_TYPEDEF,
757 &objfile->static_psymbols,
759 psymtab_language, objfile);
762 /* Also a typedef with the same name. */
763 add_psymbol_to_list (namestring, p - namestring,
764 VAR_NAMESPACE, LOC_TYPEDEF,
765 &objfile->static_psymbols,
766 CUR_SYMBOL_VALUE, 0, psymtab_language,
770 /* The semantics of C++ state that "struct foo { ... }"
771 also defines a typedef for "foo". Unfortuantely, cfront
772 never makes the typedef when translating from C++ to C.
773 We make the typedef here so that "ptype foo" works as
774 expected for cfront translated code. */
775 else if (psymtab_language == language_cplus)
777 /* Also a typedef with the same name. */
778 add_psymbol_to_list (namestring, p - namestring,
779 VAR_NAMESPACE, LOC_TYPEDEF,
780 &objfile->static_psymbols,
781 CUR_SYMBOL_VALUE, 0, psymtab_language,
787 if (p != namestring) /* a name is there, not just :T... */
789 add_psymbol_to_list (namestring, p - namestring,
790 VAR_NAMESPACE, LOC_TYPEDEF,
791 &objfile->static_psymbols,
793 psymtab_language, objfile);
796 /* If this is an enumerated type, we need to
797 add all the enum constants to the partial symbol
798 table. This does not cover enums without names, e.g.
799 "enum {a, b} c;" in C, but fortunately those are
800 rare. There is no way for GDB to find those from the
801 enum type without spending too much time on it. Thus
802 to solve this problem, the compiler needs to put out the
803 enum in a nameless type. GCC2 does this. */
805 /* We are looking for something of the form
806 <name> ":" ("t" | "T") [<number> "="] "e" <size>
807 {<constant> ":" <value> ","} ";". */
809 /* Skip over the colon and the 't' or 'T'. */
811 /* This type may be given a number. Also, numbers can come
812 in pairs like (0,26). Skip over it. */
813 while ((*p >= '0' && *p <= '9')
814 || *p == '(' || *p == ',' || *p == ')'
820 /* We have found an enumerated type. skip size */
821 while (*p >= '0' && *p <= '9') p++;
822 /* According to comments in read_enum_type
823 a comma could end it instead of a semicolon.
824 I don't know where that happens.
826 while (*p && *p != ';' && *p != ',')
830 /* Check for and handle cretinous dbx symbol name
833 p = next_symbol_text (objfile);
836 /* Point to the character after the name
837 of the enum constant. */
838 for (q = p; *q && *q != ':'; q++)
840 /* Note that the value doesn't matter for
841 enum constants in psymtabs, just in symtabs. */
842 add_psymbol_to_list (p, q - p,
843 VAR_NAMESPACE, LOC_CONST,
844 &objfile->static_psymbols, 0,
845 0, psymtab_language, objfile);
846 /* Point past the name. */
848 /* Skip over the value. */
849 while (*p && *p != ',')
851 /* Advance past the comma. */
858 /* Constant, e.g. from "const" in Pascal. */
859 add_psymbol_to_list (namestring, p - namestring,
860 VAR_NAMESPACE, LOC_CONST,
861 &objfile->static_psymbols, CUR_SYMBOL_VALUE,
862 0, psymtab_language, objfile);
866 CUR_SYMBOL_VALUE += ANOFFSET(section_offsets, SECT_OFF_TEXT);
867 if (pst && pst->textlow == 0)
868 pst->textlow = CUR_SYMBOL_VALUE;
870 add_psymbol_to_list (namestring, p - namestring,
871 VAR_NAMESPACE, LOC_BLOCK,
872 &objfile->static_psymbols, CUR_SYMBOL_VALUE,
873 0, psymtab_language, objfile);
877 CUR_SYMBOL_VALUE += ANOFFSET(section_offsets, SECT_OFF_TEXT);
878 if (pst && pst->textlow == 0)
879 pst->textlow = CUR_SYMBOL_VALUE;
881 add_psymbol_to_list (namestring, p - namestring,
882 VAR_NAMESPACE, LOC_BLOCK,
883 &objfile->global_psymbols, CUR_SYMBOL_VALUE,
884 0, psymtab_language, objfile);
893 /* It is a C++ nested symbol. We don't need to record it
894 (I don't think); if we try to look up foo::bar::baz,
895 then symbols for the symtab containing foo should get
897 /* Someone says sun cc puts out symbols like
898 /foo/baz/maclib::/usr/local/bin/maclib,
899 which would get here with a symbol type of ':'. */
903 /* Unexpected symbol descriptor. The second and subsequent stabs
904 of a continued stab can show up here. The question is
905 whether they ever can mimic a normal stab--it would be
906 nice if not, since we certainly don't want to spend the
907 time searching to the end of every string looking for
910 complain (&unknown_symchar_complaint, p[1]);
915 CUR_SYMBOL_VALUE += ANOFFSET(section_offsets, SECT_OFF_TEXT);
917 HANDLE_RBRAC(CUR_SYMBOL_VALUE);
924 /* If we haven't found it yet, ignore it. It's probably some
925 new type we don't know about yet. */
926 complain (&unknown_symtype_complaint,
927 local_hex_string ((unsigned long) bufp->n_type));
932 DBX_SYMCOUNT (objfile) = symnum;
934 /* If there's stuff to be cleaned up, clean it up. */
935 if (DBX_SYMCOUNT (objfile) > 0
936 /*FIXME, does this have a bug at start address 0? */
938 && objfile -> ei.entry_point < bufp->n_value
939 && objfile -> ei.entry_point >= last_o_file_start)
941 objfile -> ei.entry_file_lowpc = last_o_file_start;
942 objfile -> ei.entry_file_highpc = bufp->n_value;
947 os9k_end_psymtab (pst, psymtab_include_list, includes_used,
948 symnum, end_of_text_addr,
949 dependency_list, dependencies_used);
952 do_cleanups (back_to);
956 /* Allocate and partially fill a partial symtab. It will be
957 completely filled at the end of the symbol list.
959 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
960 is the address relative to which its symbols are (incremental) or 0
964 static struct partial_symtab *
965 os9k_start_psymtab (objfile, section_offsets,
966 filename, textlow, ldsymoff,ldsymcnt, global_syms, static_syms)
967 struct objfile *objfile;
968 struct section_offsets *section_offsets;
973 struct partial_symbol **global_syms;
974 struct partial_symbol **static_syms;
976 struct partial_symtab *result =
977 start_psymtab_common(objfile, section_offsets,
978 filename, textlow, global_syms, static_syms);
980 result->read_symtab_private = (char *)
981 obstack_alloc (&objfile -> psymbol_obstack, sizeof (struct symloc));
983 LDSYMOFF(result) = ldsymoff;
984 LDSYMCNT(result) = ldsymcnt;
985 result->read_symtab = os9k_psymtab_to_symtab;
987 /* Deduce the source language from the filename for this psymtab. */
988 psymtab_language = deduce_language_from_filename (filename);
992 /* Close off the current usage of PST.
993 Returns PST or NULL if the partial symtab was empty and thrown away.
994 FIXME: List variables and peculiarities of same. */
996 static struct partial_symtab *
997 os9k_end_psymtab (pst, include_list, num_includes, capping_symbol_cnt,
998 capping_text, dependency_list, number_dependencies)
999 struct partial_symtab *pst;
1000 char **include_list;
1002 int capping_symbol_cnt;
1003 CORE_ADDR capping_text;
1004 struct partial_symtab **dependency_list;
1005 int number_dependencies;
1006 /* struct partial_symbol *capping_global, *capping_static; */
1009 struct partial_symtab *p1;
1010 struct objfile *objfile = pst -> objfile;
1012 if (capping_symbol_cnt != -1)
1013 LDSYMCNT(pst) = capping_symbol_cnt - LDSYMCNT(pst);
1015 /* Under Solaris, the N_SO symbols always have a value of 0,
1016 instead of the usual address of the .o file. Therefore,
1017 we have to do some tricks to fill in texthigh and textlow.
1018 The first trick is in partial-stab.h: if we see a static
1019 or global function, and the textlow for the current pst
1020 is still 0, then we use that function's address for
1021 the textlow of the pst.
1023 Now, to fill in texthigh, we remember the last function seen
1024 in the .o file (also in partial-stab.h). Also, there's a hack in
1025 bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
1026 to here via the misc_info field. Therefore, we can fill in
1027 a reliable texthigh by taking the address plus size of the
1028 last function in the file.
1030 Unfortunately, that does not cover the case where the last function
1031 in the file is static. See the paragraph below for more comments
1034 Finally, if we have a valid textlow for the current file, we run
1035 down the partial_symtab_list filling in previous texthighs that
1036 are still unknown. */
1038 if (pst->texthigh == 0 && last_function_name) {
1041 struct minimal_symbol *minsym;
1043 p = strchr (last_function_name, ':');
1045 p = last_function_name;
1046 n = p - last_function_name;
1048 strncpy (p, last_function_name, n);
1051 minsym = lookup_minimal_symbol (p, NULL, objfile);
1054 pst->texthigh = SYMBOL_VALUE_ADDRESS(minsym)+(long)MSYMBOL_INFO(minsym);
1056 /* This file ends with a static function, and it's
1057 difficult to imagine how hard it would be to track down
1058 the elf symbol. Luckily, most of the time no one will notice,
1059 since the next file will likely be compiled with -g, so
1060 the code below will copy the first fuction's start address
1061 back to our texthigh variable. (Also, if this file is the
1062 last one in a dynamically linked program, texthigh already
1063 has the right value.) If the next file isn't compiled
1064 with -g, then the last function in this file winds up owning
1065 all of the text space up to the next -g file, or the end (minus
1066 shared libraries). This only matters for single stepping,
1067 and even then it will still work, except that it will single
1068 step through all of the covered functions, instead of setting
1069 breakpoints around them as it usualy does. This makes it
1070 pretty slow, but at least it doesn't fail.
1072 We can fix this with a fairly big change to bfd, but we need
1073 to coordinate better with Cygnus if we want to do that. FIXME. */
1075 last_function_name = NULL;
1078 /* this test will be true if the last .o file is only data */
1079 if (pst->textlow == 0)
1080 pst->textlow = pst->texthigh;
1082 /* If we know our own starting text address, then walk through all other
1083 psymtabs for this objfile, and if any didn't know their ending text
1084 address, set it to our starting address. Take care to not set our
1085 own ending address to our starting address, nor to set addresses on
1086 `dependency' files that have both textlow and texthigh zero. */
1088 ALL_OBJFILE_PSYMTABS (objfile, p1) {
1089 if (p1->texthigh == 0 && p1->textlow != 0 && p1 != pst) {
1090 p1->texthigh = pst->textlow;
1091 /* if this file has only data, then make textlow match texthigh */
1092 if (p1->textlow == 0)
1093 p1->textlow = p1->texthigh;
1098 /* End of kludge for patching Solaris textlow and texthigh. */
1100 pst->n_global_syms =
1101 objfile->global_psymbols.next - (objfile->global_psymbols.list + pst->globals_offset);
1102 pst->n_static_syms =
1103 objfile->static_psymbols.next - (objfile->static_psymbols.list + pst->statics_offset);
1105 pst->number_of_dependencies = number_dependencies;
1106 if (number_dependencies)
1108 pst->dependencies = (struct partial_symtab **)
1109 obstack_alloc (&objfile->psymbol_obstack,
1110 number_dependencies * sizeof (struct partial_symtab *));
1111 memcpy (pst->dependencies, dependency_list,
1112 number_dependencies * sizeof (struct partial_symtab *));
1115 pst->dependencies = 0;
1117 for (i = 0; i < num_includes; i++)
1119 struct partial_symtab *subpst =
1120 allocate_psymtab (include_list[i], objfile);
1122 subpst->section_offsets = pst->section_offsets;
1123 subpst->read_symtab_private =
1124 (char *) obstack_alloc (&objfile->psymbol_obstack,
1125 sizeof (struct symloc));
1129 subpst->texthigh = 0;
1131 /* We could save slight bits of space by only making one of these,
1132 shared by the entire set of include files. FIXME-someday. */
1133 subpst->dependencies = (struct partial_symtab **)
1134 obstack_alloc (&objfile->psymbol_obstack,
1135 sizeof (struct partial_symtab *));
1136 subpst->dependencies[0] = pst;
1137 subpst->number_of_dependencies = 1;
1139 subpst->globals_offset =
1140 subpst->n_global_syms =
1141 subpst->statics_offset =
1142 subpst->n_static_syms = 0;
1146 subpst->read_symtab = pst->read_symtab;
1149 sort_pst_symbols (pst);
1151 /* If there is already a psymtab or symtab for a file of this name,
1153 (If there is a symtab, more drastic things also happen.)
1154 This happens in VxWorks. */
1155 free_named_symtabs (pst->filename);
1157 if (num_includes == 0
1158 && number_dependencies == 0
1159 && pst->n_global_syms == 0
1160 && pst->n_static_syms == 0) {
1161 /* Throw away this psymtab, it's empty. We can't deallocate it, since
1162 it is on the obstack, but we can forget to chain it on the list. */
1163 /* Indicate that psymtab was thrown away. */
1165 discard_psymtab (pst);
1167 pst = (struct partial_symtab *)NULL;
1173 os9k_psymtab_to_symtab_1 (pst)
1174 struct partial_symtab *pst;
1176 struct cleanup *old_chain;
1184 fprintf_unfiltered (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
1189 /* Read in all partial symtabs on which this one is dependent */
1190 for (i = 0; i < pst->number_of_dependencies; i++)
1191 if (!pst->dependencies[i]->readin)
1193 /* Inform about additional files that need to be read in. */
1196 fputs_filtered (" ", gdb_stdout);
1198 fputs_filtered ("and ", gdb_stdout);
1200 printf_filtered ("%s...", pst->dependencies[i]->filename);
1201 wrap_here (""); /* Flush output */
1202 gdb_flush (gdb_stdout);
1204 os9k_psymtab_to_symtab_1 (pst->dependencies[i]);
1207 if (LDSYMCNT(pst)) /* Otherwise it's a dummy */
1209 /* Init stuff necessary for reading in symbols */
1212 old_chain = make_cleanup ((make_cleanup_func) really_free_pendings, 0);
1214 /* Read in this file's symbols */
1215 os9k_read_ofile_symtab (pst);
1216 sort_symtab_syms (pst->symtab);
1217 do_cleanups (old_chain);
1223 /* Read in all of the symbols for a given psymtab for real.
1224 Be verbose about it if the user wants that. */
1227 os9k_psymtab_to_symtab (pst)
1228 struct partial_symtab *pst;
1237 fprintf_unfiltered (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
1242 if (LDSYMCNT(pst) || pst->number_of_dependencies)
1244 /* Print the message now, before reading the string table,
1245 to avoid disconcerting pauses. */
1248 printf_filtered ("Reading in symbols for %s...", pst->filename);
1249 gdb_flush (gdb_stdout);
1252 sym_bfd = pst->objfile->obfd;
1253 os9k_psymtab_to_symtab_1 (pst);
1255 /* Match with global symbols. This only needs to be done once,
1256 after all of the symtabs and dependencies have been read in. */
1257 scan_file_globals (pst->objfile);
1259 /* Finish up the debug error message. */
1261 printf_filtered ("done.\n");
1265 /* Read in a defined section of a specific object file's symbols. */
1267 os9k_read_ofile_symtab (pst)
1268 struct partial_symtab *pst;
1270 register struct internal_symstruct *bufp;
1272 unsigned max_symnum;
1274 struct objfile *objfile;
1275 int sym_offset; /* Offset to start of symbols to read */
1276 CORE_ADDR text_offset; /* Start of text segment for symbols */
1277 int text_size; /* Size of text segment for symbols */
1278 struct section_offsets *section_offsets;
1281 objfile = pst->objfile;
1282 sym_offset = LDSYMOFF(pst);
1283 max_symnum = LDSYMCNT(pst);
1284 text_offset = pst->textlow;
1285 text_size = pst->texthigh - pst->textlow;
1286 section_offsets = pst->section_offsets;
1288 current_objfile = objfile;
1289 subfile_stack = NULL;
1290 last_source_file = NULL;
1292 abfd = objfile->obfd;
1293 dbg_file = objfile->auxf2;
1296 /* It is necessary to actually read one symbol *before* the start
1297 of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
1298 occurs before the N_SO symbol.
1299 Detecting this in read_dbx_symtab
1300 would slow down initial readin, so we look for it here instead. */
1301 if (!processing_acc_compilation && sym_offset >= (int)symbol_size)
1303 fseek (objefile->auxf2, sym_offset, SEEK_CUR);
1304 fill_sym(objfile->auxf2, abfd);
1307 processing_gcc_compilation = 0;
1308 if (bufp->n_type == N_TEXT)
1310 if (STREQ (namestring, GCC_COMPILED_FLAG_SYMBOL))
1311 processing_gcc_compilation = 1;
1312 else if (STREQ (namestring, GCC2_COMPILED_FLAG_SYMBOL))
1313 processing_gcc_compilation = 2;
1316 /* Try to select a C++ demangling based on the compilation unit
1319 if (processing_gcc_compilation)
1321 if (AUTO_DEMANGLING)
1323 set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
1329 /* The N_SO starting this symtab is the first symbol, so we
1330 better not check the symbol before it. I'm not this can
1331 happen, but it doesn't hurt to check for it. */
1332 bfd_seek (symfile_bfd, sym_offset, SEEK_CUR);
1333 processing_gcc_compilation = 0;
1337 fseek(dbg_file, (long)sym_offset, 0);
1339 if (bufp->n_type != (unsigned char)N_SYM_SYM)
1340 error("First symbol in segment of executable not a source symbol");
1343 for (symnum = 0; symnum < max_symnum; symnum++)
1345 QUIT; /* Allow this to be interruptable */
1346 fill_sym(dbg_file, abfd);
1348 type = bufp->n_type;
1350 os9k_process_one_symbol ((int)type, (int)bufp->n_desc,
1351 (CORE_ADDR)bufp->n_value, bufp->n_strx, section_offsets, objfile);
1353 /* We skip checking for a new .o or -l file; that should never
1354 happen in this routine. */
1356 else if (type == N_TEXT)
1358 /* I don't think this code will ever be executed, because
1359 the GCC_COMPILED_FLAG_SYMBOL usually is right before
1360 the N_SO symbol which starts this source file.
1361 However, there is no reason not to accept
1362 the GCC_COMPILED_FLAG_SYMBOL anywhere. */
1364 if (STREQ (namestring, GCC_COMPILED_FLAG_SYMBOL))
1365 processing_gcc_compilation = 1;
1366 else if (STREQ (namestring, GCC2_COMPILED_FLAG_SYMBOL))
1367 processing_gcc_compilation = 2;
1369 if (AUTO_DEMANGLING)
1371 set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
1374 else if (type & N_EXT || type == (unsigned char)N_TEXT
1375 || type == (unsigned char)N_NBTEXT
1377 /* Global symbol: see if we came across a dbx defintion for
1378 a corresponding symbol. If so, store the value. Remove
1379 syms from the chain when their values are stored, but
1380 search the whole chain, as there may be several syms from
1381 different files with the same name. */
1382 /* This is probably not true. Since the files will be read
1383 in one at a time, each reference to a global symbol will
1384 be satisfied in each file as it appears. So we skip this
1391 current_objfile = NULL;
1393 /* In a Solaris elf file, this variable, which comes from the
1394 value of the N_SO symbol, will still be 0. Luckily, text_offset,
1395 which comes from pst->textlow is correct. */
1396 if (last_source_start_addr == 0)
1397 last_source_start_addr = text_offset;
1398 pst->symtab = end_symtab (text_offset + text_size, objfile, SECT_OFF_TEXT);
1403 /* This handles a single symbol from the symbol-file, building symbols
1404 into a GDB symtab. It takes these arguments and an implicit argument.
1406 TYPE is the type field of the ".stab" symbol entry.
1407 DESC is the desc field of the ".stab" entry.
1408 VALU is the value field of the ".stab" entry.
1409 NAME is the symbol name, in our address space.
1410 SECTION_OFFSETS is a set of amounts by which the sections of this object
1411 file were relocated when it was loaded into memory.
1412 All symbols that refer
1413 to memory locations need to be offset by these amounts.
1414 OBJFILE is the object file from which we are reading symbols.
1415 It is used in end_symtab. */
1418 os9k_process_one_symbol (type, desc, valu, name, section_offsets, objfile)
1422 struct section_offsets *section_offsets;
1423 struct objfile *objfile;
1425 register struct context_stack *new;
1426 /* The stab type used for the definition of the last function.
1427 N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */
1428 static int function_stab_type = 0;
1431 /* Something is wrong if we see real data before
1432 seeing a source file name. */
1433 if (last_source_file == NULL && type != (unsigned char)N_SO)
1435 /* Ignore any symbols which appear before an N_SO symbol.
1436 Currently no one puts symbols there, but we should deal
1437 gracefully with the case. A complain()t might be in order,
1438 but this should not be an error (). */
1446 /* On most machines, the block addresses are relative to the
1447 N_SO, the linker did not relocate them (sigh). */
1448 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT);
1449 new = push_context (desc, valu);
1453 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT);
1454 new = pop_context();
1456 #if !defined (OS9K_VARIABLES_INSIDE_BLOCK)
1457 #define OS9K_VARIABLES_INSIDE_BLOCK(desc, gcc_p) 1
1460 if (!OS9K_VARIABLES_INSIDE_BLOCK(desc, processing_gcc_compilation))
1461 local_symbols = new->locals;
1463 if (context_stack_depth > 1)
1465 /* This is not the outermost LBRAC...RBRAC pair in the function,
1466 its local symbols preceded it, and are the ones just recovered
1467 from the context stack. Define the block for them (but don't
1468 bother if the block contains no symbols. Should we complain
1469 on blocks without symbols? I can't think of any useful purpose
1471 if (local_symbols != NULL)
1473 /* Muzzle a compiler bug that makes end < start. (which
1474 compilers? Is this ever harmful?). */
1475 if (new->start_addr > valu)
1477 complain (&lbrac_rbrac_complaint);
1478 new->start_addr = valu;
1480 /* Make a block for the local symbols within. */
1481 finish_block (0, &local_symbols, new->old_blocks,
1482 new->start_addr, valu, objfile);
1487 if (context_stack_depth == 0)
1489 within_function = 0;
1490 /* Make a block for the local symbols within. */
1491 finish_block (new->name, &local_symbols, new->old_blocks,
1492 new->start_addr, valu, objfile);
1496 /* attach local_symbols to the end of new->locals */
1497 if (!new->locals) new->locals = local_symbols;
1502 while (p->next) p = p->next;
1503 p->next = local_symbols;
1508 if (OS9K_VARIABLES_INSIDE_BLOCK(desc, processing_gcc_compilation))
1509 /* Now pop locals of block just finished. */
1510 local_symbols = new->locals;
1515 /* This type of "symbol" really just records
1516 one line-number -- core-address correspondence.
1517 Enter it in the line list for this symbol table. */
1518 /* Relocate for dynamic loading and for ELF acc fn-relative syms. */
1519 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT);
1520 /* FIXME: loses if sizeof (char *) > sizeof (int) */
1521 record_line (current_subfile, (int)name, valu);
1524 /* The following symbol types need to have the appropriate offset added
1525 to their value; then we process symbol definitions in the name. */
1532 char *p = strchr (name, ':');
1542 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT);
1543 n = strrchr(name, '/');
1553 if (symfile_depth++ == 0) {
1554 if (last_source_file) {
1555 end_symtab (valu, objfile, SECT_OFF_TEXT);
1560 start_symtab (n, dirn, valu);
1561 record_debugformat ("OS9");
1564 start_subfile (n, dirn!=NULL ? dirn : current_subfile->dirname);
1570 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT);
1571 function_stab_type = type;
1573 within_function = 1;
1574 new = push_context (0, valu);
1575 new->name = define_symbol (valu, name, desc, type, objfile);
1580 valu += ANOFFSET (section_offsets, SECT_OFF_DATA);
1581 define_symbol (valu, name, desc, type, objfile);
1585 define_symbol (valu, name, desc, type, objfile);
1592 if (--symfile_depth != 0)
1593 start_subfile(pop_subfile(), current_subfile->dirname);
1597 complain (&unknown_symtype_complaint,
1598 local_hex_string((unsigned long) type));
1605 previous_stab_code = type;
1608 static struct sym_fns os9k_sym_fns =
1610 bfd_target_os9k_flavour,
1611 os9k_new_init, /* sym_new_init: init anything gbl to entire symtab */
1612 os9k_symfile_init, /* sym_init: read initial info, setup for sym_read() */
1613 os9k_symfile_read, /* sym_read: read a symbol file into symtab */
1614 os9k_symfile_finish, /* sym_finish: finished with file, cleanup */
1615 default_symfile_offsets,
1616 /* sym_offsets: parse user's offsets to internal form*/
1617 NULL /* next: pointer to next struct sym_fns */
1621 _initialize_os9kread ()
1623 add_symtab_fns(&os9k_sym_fns);