1 /* Read os9/os9k symbol tables and convert to internal format, for GDB.
2 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993
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., 675 Mass Ave, Cambridge, MA 02139, 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 */
39 #if defined(USG) || defined(__CYGNUSCLIB__)
40 #include <sys/types.h>
45 #include <sys/param.h>
52 #include "breakpoint.h"
55 #include "gdbcore.h" /* for bfd stuff */
56 #include "libbfd.h" /* FIXME Secret internal BFD stuff (bfd_read) */
57 #include "libaout.h" /* FIXME Secret internal BFD stuff for a.out */
61 #include "gdb-stabs.h"
63 #include "language.h" /* Needed inside partial-stab.h */
64 #include "complaints.h"
66 #include "stabsread.h"
68 #if !defined (SEEK_SET)
73 /* Each partial symbol table entry contains a pointer to private data for the
74 read_symtab() function to use when expanding a partial symbol table entry
75 to a full symbol table entry.
77 For dbxread this structure contains the offset within the file symbol table
78 of first local symbol for this file, and count of the section
79 of the symbol table devoted to this file's symbols (actually, the section
80 bracketed may contain more than just this file's symbols). It also contains
81 further information needed to locate the symbols if they are in an ELF file.
83 If ldsymcnt is 0, the only reason for this thing's existence is the
84 dependency list. Nothing else will happen when it is read in. */
86 #define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff)
87 #define LDSYMCNT(p) (((struct symloc *)((p)->read_symtab_private))->ldsymnum)
94 /* Remember what we deduced to be the source language of this psymtab. */
95 static enum language psymtab_language = language_unknown;
97 /* keep partial symbol table file nested depth */
98 static int psymfile_depth = 0;
100 /* keep symbol table file nested depth */
101 static int symfile_depth = 0;
103 /* Nonzero means give verbose info on gdb action. From main.c. */
104 extern int info_verbose;
106 extern int previous_stab_code;
108 /* The BFD for this file -- implicit parameter to next_symbol_text. */
109 static bfd *symfile_bfd;
111 /* Name of last function encountered. Used in Solaris to approximate
112 object file boundaries. */
113 static char *last_function_name;
115 /* Complaints about the symbols we have encountered. */
116 extern struct complaint lbrac_complaint;
118 extern struct complaint unknown_symtype_complaint;
120 extern struct complaint unknown_symchar_complaint;
122 extern struct complaint lbrac_rbrac_complaint;
124 extern struct complaint repeated_header_complaint;
126 extern struct complaint repeated_header_name_complaint;
128 static struct complaint lbrac_unmatched_complaint =
129 {"unmatched Increment Block Entry before symtab pos %d", 0, 0};
131 static struct complaint lbrac_mismatch_complaint =
132 {"IBE/IDE symbol mismatch at symtab pos %d", 0, 0};
135 /* Local function prototypes */
137 os9k_read_ofile_symtab PARAMS ((struct partial_symtab *));
140 os9k_psymtab_to_symtab PARAMS ((struct partial_symtab *));
143 os9k_psymtab_to_symtab_1 PARAMS ((struct partial_symtab *));
146 read_os9k_psymtab PARAMS ((struct section_offsets *, struct objfile *,
150 init_psymbol_list PARAMS ((struct objfile *));
153 os9k_next_symbol_text PARAMS ((void));
156 fill_sym PARAMS ((FILE *, bfd *));
159 os9k_symfile_init PARAMS ((struct objfile *));
162 os9k_new_init PARAMS ((struct objfile *));
165 os9k_symfile_read PARAMS ((struct objfile *, struct section_offsets *, int));
168 os9k_symfile_finish PARAMS ((struct objfile *));
171 os9k_process_one_symbol PARAMS ((int, int, CORE_ADDR, char *,
172 struct section_offsets *, struct objfile *));
174 static struct partial_symtab *
175 os9k_start_psymtab PARAMS ((struct objfile *, struct section_offsets *, char *,
176 CORE_ADDR, int, int, struct partial_symbol *,
177 struct partial_symbol *));
179 static struct partial_symtab *
180 os9k_end_psymtab PARAMS ((struct partial_symtab *, char **, int, int, CORE_ADDR,
181 struct partial_symtab **, int));
184 record_minimal_symbol PARAMS ((char *, CORE_ADDR, int, struct objfile *));
186 #define HANDLE_RBRAC(val) \
187 if ((val) > pst->texthigh) pst->texthigh = (val);
189 #define SWAP_STBHDR(hdrp, abfd) \
191 (hdrp)->fmtno = bfd_get_16(abfd, (unsigned char *)&(hdrp)->fmtno); \
192 (hdrp)->crc = bfd_get_32(abfd, (unsigned char *)&(hdrp)->crc); \
193 (hdrp)->offset = bfd_get_32(abfd, (unsigned char *)&(hdrp)->offset); \
194 (hdrp)->nsym = bfd_get_32(abfd, (unsigned char *)&(hdrp)->nsym); \
196 #define SWAP_STBSYM(symp, abfd) \
198 (symp)->value = bfd_get_32(abfd, (unsigned char *)&(symp)->value); \
199 (symp)->type = bfd_get_16(abfd, (unsigned char *)&(symp)->type); \
200 (symp)->stroff = bfd_get_32(abfd, (unsigned char *)&(symp)->stroff); \
210 record_minimal_symbol (name, address, type, objfile)
214 struct objfile *objfile;
216 enum minimal_symbol_type ms_type;
220 case N_TEXT: ms_type = mst_text; break;
221 case N_DATA: ms_type = mst_data; break;
222 case N_BSS: ms_type = mst_bss; break;
223 case N_RDATA: ms_type = mst_bss; break;
224 case N_IDATA: ms_type = mst_data; break;
225 case N_ABS: ms_type = mst_abs; break;
226 default: ms_type = mst_unknown; break;
229 prim_record_minimal_symbol
230 (obsavestring (name, strlen(name), &objfile->symbol_obstack),
231 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)
254 struct objfile *objfile;
259 struct stbsymbol sym;
261 char buf[64], buf1[128];
264 if (fp == NULL) return;
265 abfd = objfile->obfd;
266 fread(&hdr.comhdr[0], sizeof(mhhdr), 1, fp);
275 if (i%2) ch=getc(fp);
278 fread(&hdr.fmtno, sizeof(hdr.fmtno), 1, fp);
279 fread(&hdr.crc, sizeof(hdr.crc), 1, fp);
280 fread(&hdr.offset, sizeof(hdr.offset), 1, fp);
281 fread(&hdr.nsym, sizeof(hdr.nsym), 1, fp);
282 SWAP_STBHDR(&hdr, abfd);
285 init_minimal_symbol_collection();
287 for (i = hdr.nsym; i > 0; i--) {
288 fseek(fp, (long)off, 0);
289 fread(&sym.value, sizeof(sym.value), 1, fp);
290 fread(&sym.type, sizeof(sym.type), 1, fp);
291 fread(&sym.stroff, sizeof(sym.stroff), 1, fp);
292 SWAP_STBSYM (&sym, abfd);
293 fseek(fp, (long)sym.stroff, 0);
302 record_minimal_symbol(buf1, sym.value, sym.type&7, objfile);
305 install_minimal_symbols (objfile);
309 /* Scan and build partial symbols for a symbol file.
310 We have been initialized by a call to os9k_symfile_init, which
311 put all the relevant info into a "struct os9k_symfile_info",
312 hung off the objfile structure.
314 SECTION_OFFSETS contains offsets relative to which the symbols in the
315 various sections are (depending where the sections were actually loaded).
316 MAINLINE is true if we are reading the main symbol
317 table (as opposed to a shared lib or dynamically loaded file). */
320 os9k_symfile_read (objfile, section_offsets, mainline)
321 struct objfile *objfile;
322 struct section_offsets *section_offsets;
323 int mainline; /* FIXME comments above */
328 struct cleanup *back_to;
330 sym_bfd = objfile->obfd;
331 /* If we are reinitializing, or if we have never loaded syms yet, init */
332 if (mainline || objfile->global_psymbols.size == 0 ||
333 objfile->static_psymbols.size == 0)
334 init_psymbol_list (objfile);
337 back_to = make_cleanup (really_free_pendings, 0);
339 make_cleanup (discard_minimal_symbols, 0);
340 read_minimal_symbols (objfile);
342 /* Now that the symbol table data of the executable file are all in core,
343 process them and define symbols accordingly. */
344 read_os9k_psymtab (section_offsets, objfile,
345 bfd_section_vma (sym_bfd, DBX_TEXT_SECT (objfile)),
346 bfd_section_size (sym_bfd, DBX_TEXT_SECT (objfile)));
348 if (!have_partial_symbols ()) {
350 printf_filtered ("(no debugging symbols found)...");
354 do_cleanups (back_to);
357 /* Initialize anything that needs initializing when a completely new
358 symbol file is specified (not just adding some symbols from another
359 file, e.g. a shared library). */
362 os9k_new_init (ignore)
363 struct objfile *ignore;
365 stabsread_new_init ();
366 buildsym_new_init ();
369 init_header_files ();
373 /* os9k_symfile_init ()
374 It is passed a struct objfile which contains, among other things,
375 the BFD for the file whose symbols are being read, and a slot for a pointer
376 to "private data" which we fill with goodies.
378 Since BFD doesn't know how to read debug symbols in a format-independent
379 way (and may never do so...), we have to do it ourselves. We will never
380 be called unless this is an a.out (or very similar) file.
381 FIXME, there should be a cleaner peephole into the BFD environment here. */
384 os9k_symfile_init (objfile)
385 struct objfile *objfile;
388 bfd *sym_bfd = objfile->obfd;
389 char *name = bfd_get_filename (sym_bfd);
390 char dbgname[64], stbname[64];
395 strcpy(dbgname, name);
396 strcat(dbgname, ".dbg");
397 strcpy(stbname, name);
398 strcat(stbname, ".stb");
400 if ((symfile = fopen(dbgname, "r")) == NULL) {
401 warning("Symbol file %s not found", dbgname);
403 objfile->auxf2 = symfile;
405 if ((minfile = fopen(stbname, "r")) == NULL) {
406 warning("Symbol file %s not found", stbname);
408 objfile->auxf1 = minfile;
410 /* Allocate struct to keep track of the symfile */
411 objfile->sym_stab_info = (PTR)
412 xmmalloc (objfile -> md, sizeof (struct dbx_symfile_info));
413 DBX_SYMFILE_INFO (objfile)->stab_section_info = NULL;
415 DBX_TEXT_SECT (objfile) = bfd_get_section_by_name (sym_bfd, ".text");
416 if (!DBX_TEXT_SECT (objfile))
417 error ("Can't find .text section in file");
419 DBX_SYMBOL_SIZE (objfile) = 0; /* variable size symbol */
420 DBX_SYMCOUNT (objfile) = 0; /* used to be bfd_get_symcount(sym_bfd) */
421 DBX_SYMTAB_OFFSET (objfile) = 0; /* used to be SYMBOL_TABLE_OFFSET */
424 /* Perform any local cleanups required when we are done with a particular
425 objfile. I.E, we are in the process of discarding all symbol information
426 for an objfile, freeing up all memory held for it, and unlinking the
427 objfile struct from the global list of known objfiles. */
430 os9k_symfile_finish (objfile)
431 struct objfile *objfile;
433 if (objfile->sym_stab_info != NULL)
435 mfree (objfile -> md, objfile->sym_stab_info);
438 free_header_files ();
450 #define SYNC (int)0xefbefeca
452 #define SWAP_DBGHDR(hdrp, abfd) \
454 (hdrp)->sync = bfd_get_32(abfd, (unsigned char *)&(hdrp)->sync); \
455 (hdrp)->rev = bfd_get_16(abfd, (unsigned char *)&(hdrp)->rev); \
456 (hdrp)->crc = bfd_get_32(abfd, (unsigned char *)&(hdrp)->crc); \
457 (hdrp)->os = bfd_get_16(abfd, (unsigned char *)&(hdrp)->os); \
458 (hdrp)->cpu = bfd_get_16(abfd, (unsigned char *)&(hdrp)->cpu); \
461 #define N_SYM_CMPLR 0
462 #define N_SYM_SLINE 1
464 #define N_SYM_LBRAC 3
465 #define N_SYM_RBRAC 4
468 struct internal_symstruct {
474 static struct internal_symstruct symbol;
475 static struct internal_symstruct *symbuf = &symbol;
476 static char strbuf[4096];
477 static struct st_dbghdr dbghdr;
478 static short cmplrid;
480 #define VER_PRE_ULTRAC ((short)4)
481 #define VER_ULTRAC ((short)5)
484 fill_sym (dbg_file, abfd)
494 int nbytes = fread(&si, sizeof(si), 1, dbg_file);
498 perror_with_name ("reading .dbg file.");
501 symbuf->n_strx = NULL;
502 symbuf->n_type = bfd_get_16 (abfd, (unsigned char *)&si);
503 symbuf->n_type = 0xf & symbuf->n_type;
504 switch (symbuf->n_type)
507 fread(&si, sizeof(si), 1, dbg_file);
508 symbuf->n_desc = bfd_get_16(abfd, (unsigned char *)&si);
509 cmplrid = symbuf->n_desc & 0xff;
512 fread(&li, sizeof(li), 1, dbg_file);
513 symbuf->n_value = bfd_get_32(abfd, (unsigned char *)&li);
514 fread(&li, sizeof(li), 1, dbg_file);
515 li = bfd_get_32(abfd, (unsigned char *)&li);
516 symbuf->n_strx = (char *)(li >> 12);
517 symbuf->n_desc = li & 0xfff;
520 fread(&li, sizeof(li), 1, dbg_file);
521 symbuf->n_value = bfd_get_32(abfd, (unsigned char *)&li);
525 strbuf[si++] = (char) ii;
526 } while (ii != 0 || si % 2 != 0);
527 symbuf->n_strx = strbuf;
528 p = (char *) strchr (strbuf, ':');
530 if ((p[1] == 'F' || p[1] == 'f') && cmplrid == VER_PRE_ULTRAC)
532 fread(&si, sizeof(si), 1, dbg_file);
533 nmask = bfd_get_16(abfd, (unsigned char *)&si);
534 for (ii=0; ii<nmask; ii++)
535 fread(&si, sizeof(si), 1, dbg_file);
539 fread(&li, sizeof(li), 1, dbg_file);
540 symbuf->n_value = bfd_get_32(abfd, (unsigned char *)&li);
543 fread(&li, sizeof(li), 1, dbg_file);
544 symbuf->n_value = bfd_get_32(abfd, (unsigned char *)&li);
552 /* Initializes storage for all of the partial symbols that will be
553 created by read_dbx_symtab and subsidiaries. */
556 init_psymbol_list (objfile)
557 struct objfile *objfile;
559 /* Free any previously allocated psymbol lists. */
560 if (objfile -> global_psymbols.list)
561 mfree (objfile -> md, (PTR)objfile -> global_psymbols.list);
562 if (objfile -> static_psymbols.list)
563 mfree (objfile -> md, (PTR)objfile -> static_psymbols.list);
565 /* Current best guess is that there are approximately a twentieth
566 of the total symbols (in a debugging file) are global or static
568 objfile -> global_psymbols.size = DBX_SYMCOUNT (objfile) / 10;
569 objfile -> static_psymbols.size = DBX_SYMCOUNT (objfile) / 10;
570 objfile -> global_psymbols.next = objfile -> global_psymbols.list = (struct partial_symbol *)
571 xmmalloc (objfile -> md, objfile -> global_psymbols.size * sizeof (struct partial_symbol));
572 objfile -> static_psymbols.next = objfile -> static_psymbols.list = (struct partial_symbol *)
573 xmmalloc (objfile -> md, objfile -> static_psymbols.size * sizeof (struct partial_symbol));
576 /* Given pointers to an a.out symbol table in core containing dbx
577 style data, setup partial_symtab's describing each source file for
578 which debugging information is available.
579 SYMFILE_NAME is the name of the file we are reading from
580 and SECTION_OFFSETS is the set of offsets for the various sections
581 of the file (a set of zeros if the mainline program). */
584 read_os9k_psymtab (section_offsets, objfile, text_addr, text_size)
585 struct section_offsets *section_offsets;
586 struct objfile *objfile;
590 register struct internal_symstruct *bufp = 0; /* =0 avoids gcc -Wall glitch*/
591 register char *namestring;
593 int past_first_source_file = 0;
594 CORE_ADDR last_o_file_start = 0;
595 struct cleanup *back_to;
599 /* End of the text segment of the executable file. */
600 static CORE_ADDR end_of_text_addr;
602 /* Current partial symtab */
603 static struct partial_symtab *pst = 0;
605 /* List of current psymtab's include files */
606 char **psymtab_include_list;
607 int includes_allocated;
610 /* Index within current psymtab dependency list */
611 struct partial_symtab **dependency_list;
612 int dependencies_used, dependencies_allocated;
614 includes_allocated = 30;
616 psymtab_include_list = (char **) alloca (includes_allocated *
619 dependencies_allocated = 30;
620 dependencies_used = 0;
622 (struct partial_symtab **) alloca (dependencies_allocated *
623 sizeof (struct partial_symtab *));
625 last_source_file = NULL;
627 #ifdef END_OF_TEXT_DEFAULT
628 end_of_text_addr = END_OF_TEXT_DEFAULT;
630 end_of_text_addr = text_addr + section_offsets->offsets[SECT_OFF_TEXT]
631 + text_size; /* Relocate */
634 abfd = objfile->obfd;
637 fread(&dbghdr.sync, sizeof(dbghdr.sync), 1, fp);
638 fread(&dbghdr.rev, sizeof(dbghdr.rev), 1, fp);
639 fread(&dbghdr.crc, sizeof(dbghdr.crc), 1, fp);
640 fread(&dbghdr.os, sizeof(dbghdr.os), 1, fp);
641 fread(&dbghdr.cpu, sizeof(dbghdr.cpu), 1, fp);
642 SWAP_DBGHDR(&dbghdr, abfd);
650 /* Get the symbol for this run and pull out some info */
651 QUIT; /* allow this to be interruptable */
652 cursymoffset = ftell(objfile->auxf2);
653 ret = fill_sym(objfile->auxf2, abfd);
658 /* Special case to speed up readin. */
659 if (bufp->n_type == (short)N_SYM_SLINE) continue;
661 #define CUR_SYMBOL_VALUE bufp->n_value
664 switch (bufp->n_type)
672 CUR_SYMBOL_VALUE += ANOFFSET(section_offsets, SECT_OFF_TEXT);
673 if (psymfile_depth == 1 && pst)
675 os9k_end_psymtab (pst, psymtab_include_list, includes_used,
676 symnum, CUR_SYMBOL_VALUE,
677 dependency_list, dependencies_used);
678 pst = (struct partial_symtab *) 0;
680 dependencies_used = 0;
685 case N_SYM_SYM: /* Typedef or automatic variable. */
686 namestring = bufp->n_strx;
687 p = (char *) strchr (namestring, ':');
689 continue; /* Not a debugging symbol. */
691 /* Main processing section for debugging symbols which
692 the initial read through the symbol tables needs to worry
693 about. If we reach this point, the symbol which we are
694 considering is definitely one we are interested in.
695 p must also contain the (valid) index into the namestring
696 which indicates the debugging type symbol. */
703 enum language tmp_language;
705 valu = CUR_SYMBOL_VALUE +
706 ANOFFSET (section_offsets, SECT_OFF_TEXT);
707 past_first_source_file = 1;
709 if (psymfile_depth == 0) {
711 pst = os9k_start_psymtab (objfile, section_offsets,
715 objfile -> global_psymbols.next,
716 objfile -> static_psymbols.next);
717 } else { /* this is a include file */
718 tmp_language = deduce_language_from_filename (namestring);
719 if (tmp_language != language_unknown
720 && (tmp_language != language_c
721 || psymtab_language != language_cplus))
722 psymtab_language = tmp_language;
725 if (pst && STREQ (namestring, pst->filename))
729 for (i = 0; i < includes_used; i++)
730 if (STREQ (namestring, psymtab_include_list[i]))
740 psymtab_include_list[includes_used++] = namestring;
741 if (includes_used >= includes_allocated)
743 char **orig = psymtab_include_list;
745 psymtab_include_list = (char **)
746 alloca ((includes_allocated *= 2) * sizeof (char *));
747 memcpy ((PTR)psymtab_include_list, (PTR)orig,
748 includes_used * sizeof (char *));
757 ADD_PSYMBOL_ADDR_TO_LIST (namestring, p - namestring,
758 VAR_NAMESPACE, LOC_STATIC,
759 objfile->static_psymbols,
761 psymtab_language, objfile);
764 ADD_PSYMBOL_ADDR_TO_LIST (namestring, p - namestring,
765 VAR_NAMESPACE, LOC_STATIC,
766 objfile->global_psymbols,
768 psymtab_language, objfile);
772 if (p != namestring) /* a name is there, not just :T... */
774 ADD_PSYMBOL_TO_LIST (namestring, p - namestring,
775 STRUCT_NAMESPACE, LOC_TYPEDEF,
776 objfile->static_psymbols,
778 psymtab_language, objfile);
781 /* Also a typedef with the same name. */
782 ADD_PSYMBOL_TO_LIST (namestring, p - namestring,
783 VAR_NAMESPACE, LOC_TYPEDEF,
784 objfile->static_psymbols,
785 CUR_SYMBOL_VALUE, psymtab_language,
789 /* The semantics of C++ state that "struct foo { ... }"
790 also defines a typedef for "foo". Unfortuantely, cfront
791 never makes the typedef when translating from C++ to C.
792 We make the typedef here so that "ptype foo" works as
793 expected for cfront translated code. */
794 else if (psymtab_language == language_cplus)
796 /* Also a typedef with the same name. */
797 ADD_PSYMBOL_TO_LIST (namestring, p - namestring,
798 VAR_NAMESPACE, LOC_TYPEDEF,
799 objfile->static_psymbols,
800 CUR_SYMBOL_VALUE, psymtab_language,
806 if (p != namestring) /* a name is there, not just :T... */
808 ADD_PSYMBOL_TO_LIST (namestring, p - namestring,
809 VAR_NAMESPACE, LOC_TYPEDEF,
810 objfile->static_psymbols,
812 psymtab_language, objfile);
815 /* If this is an enumerated type, we need to
816 add all the enum constants to the partial symbol
817 table. This does not cover enums without names, e.g.
818 "enum {a, b} c;" in C, but fortunately those are
819 rare. There is no way for GDB to find those from the
820 enum type without spending too much time on it. Thus
821 to solve this problem, the compiler needs to put out the
822 enum in a nameless type. GCC2 does this. */
824 /* We are looking for something of the form
825 <name> ":" ("t" | "T") [<number> "="] "e" <size>
826 {<constant> ":" <value> ","} ";". */
828 /* Skip over the colon and the 't' or 'T'. */
830 /* This type may be given a number. Also, numbers can come
831 in pairs like (0,26). Skip over it. */
832 while ((*p >= '0' && *p <= '9')
833 || *p == '(' || *p == ',' || *p == ')'
839 /* We have found an enumerated type. skip size */
840 while (*p >= '0' && *p <= '9') p++;
841 /* According to comments in read_enum_type
842 a comma could end it instead of a semicolon.
843 I don't know where that happens.
845 while (*p && *p != ';' && *p != ',')
849 /* Check for and handle cretinous dbx symbol name
852 p = next_symbol_text ();
855 /* Point to the character after the name
856 of the enum constant. */
857 for (q = p; *q && *q != ':'; q++)
859 /* Note that the value doesn't matter for
860 enum constants in psymtabs, just in symtabs. */
861 ADD_PSYMBOL_TO_LIST (p, q - p,
862 VAR_NAMESPACE, LOC_CONST,
863 objfile->static_psymbols, 0,
864 psymtab_language, objfile);
865 /* Point past the name. */
867 /* Skip over the value. */
868 while (*p && *p != ',')
870 /* Advance past the comma. */
877 /* Constant, e.g. from "const" in Pascal. */
878 ADD_PSYMBOL_TO_LIST (namestring, p - namestring,
879 VAR_NAMESPACE, LOC_CONST,
880 objfile->static_psymbols, CUR_SYMBOL_VALUE,
881 psymtab_language, objfile);
885 CUR_SYMBOL_VALUE += ANOFFSET(section_offsets, SECT_OFF_TEXT);
886 if (pst && pst->textlow == 0)
887 pst->textlow = CUR_SYMBOL_VALUE;
889 ADD_PSYMBOL_TO_LIST (namestring, p - namestring,
890 VAR_NAMESPACE, LOC_BLOCK,
891 objfile->static_psymbols, CUR_SYMBOL_VALUE,
892 psymtab_language, objfile);
896 CUR_SYMBOL_VALUE += ANOFFSET(section_offsets, SECT_OFF_TEXT);
897 if (pst && pst->textlow == 0)
898 pst->textlow = CUR_SYMBOL_VALUE;
900 ADD_PSYMBOL_TO_LIST (namestring, p - namestring,
901 VAR_NAMESPACE, LOC_BLOCK,
902 objfile->global_psymbols, CUR_SYMBOL_VALUE,
903 psymtab_language, objfile);
912 /* It is a C++ nested symbol. We don't need to record it
913 (I don't think); if we try to look up foo::bar::baz,
914 then symbols for the symtab containing foo should get
916 /* Someone says sun cc puts out symbols like
917 /foo/baz/maclib::/usr/local/bin/maclib,
918 which would get here with a symbol type of ':'. */
922 /* Unexpected symbol descriptor. The second and subsequent stabs
923 of a continued stab can show up here. The question is
924 whether they ever can mimic a normal stab--it would be
925 nice if not, since we certainly don't want to spend the
926 time searching to the end of every string looking for
929 complain (&unknown_symchar_complaint, p[1]);
934 CUR_SYMBOL_VALUE += ANOFFSET(section_offsets, SECT_OFF_TEXT);
936 HANDLE_RBRAC(CUR_SYMBOL_VALUE);
943 /* If we haven't found it yet, ignore it. It's probably some
944 new type we don't know about yet. */
945 complain (&unknown_symtype_complaint,
946 local_hex_string ((unsigned long) bufp->n_type));
951 DBX_SYMCOUNT (objfile) = symnum;
953 /* If there's stuff to be cleaned up, clean it up. */
954 if (DBX_SYMCOUNT (objfile) > 0
955 /*FIXME, does this have a bug at start address 0? */
957 && objfile -> ei.entry_point < bufp->n_value
958 && objfile -> ei.entry_point >= last_o_file_start)
960 objfile -> ei.entry_file_lowpc = last_o_file_start;
961 objfile -> ei.entry_file_highpc = bufp->n_value;
966 os9k_end_psymtab (pst, psymtab_include_list, includes_used,
967 symnum, end_of_text_addr,
968 dependency_list, dependencies_used);
971 do_cleanups (back_to);
975 /* Allocate and partially fill a partial symtab. It will be
976 completely filled at the end of the symbol list.
978 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
979 is the address relative to which its symbols are (incremental) or 0
983 static struct partial_symtab *
984 os9k_start_psymtab (objfile, section_offsets,
985 filename, textlow, ldsymoff,ldsymcnt, global_syms, static_syms)
986 struct objfile *objfile;
987 struct section_offsets *section_offsets;
992 struct partial_symbol *global_syms;
993 struct partial_symbol *static_syms;
995 struct partial_symtab *result =
996 start_psymtab_common(objfile, section_offsets,
997 filename, textlow, global_syms, static_syms);
999 result->read_symtab_private = (char *)
1000 obstack_alloc (&objfile -> psymbol_obstack, sizeof (struct symloc));
1002 LDSYMOFF(result) = ldsymoff;
1003 LDSYMCNT(result) = ldsymcnt;
1004 result->read_symtab = os9k_psymtab_to_symtab;
1006 /* Deduce the source language from the filename for this psymtab. */
1007 psymtab_language = deduce_language_from_filename (filename);
1011 /* Close off the current usage of PST.
1012 Returns PST or NULL if the partial symtab was empty and thrown away.
1013 FIXME: List variables and peculiarities of same. */
1015 static struct partial_symtab *
1016 os9k_end_psymtab (pst, include_list, num_includes, capping_symbol_cnt,
1017 capping_text, dependency_list, number_dependencies)
1018 struct partial_symtab *pst;
1019 char **include_list;
1021 int capping_symbol_cnt;
1022 CORE_ADDR capping_text;
1023 struct partial_symtab **dependency_list;
1024 int number_dependencies;
1025 /* struct partial_symbol *capping_global, *capping_static;*/
1028 struct partial_symtab *p1;
1029 struct objfile *objfile = pst -> objfile;
1031 if (capping_symbol_cnt != -1)
1032 LDSYMCNT(pst) = capping_symbol_cnt - LDSYMCNT(pst);
1034 /* Under Solaris, the N_SO symbols always have a value of 0,
1035 instead of the usual address of the .o file. Therefore,
1036 we have to do some tricks to fill in texthigh and textlow.
1037 The first trick is in partial-stab.h: if we see a static
1038 or global function, and the textlow for the current pst
1039 is still 0, then we use that function's address for
1040 the textlow of the pst.
1042 Now, to fill in texthigh, we remember the last function seen
1043 in the .o file (also in partial-stab.h). Also, there's a hack in
1044 bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
1045 to here via the misc_info field. Therefore, we can fill in
1046 a reliable texthigh by taking the address plus size of the
1047 last function in the file.
1049 Unfortunately, that does not cover the case where the last function
1050 in the file is static. See the paragraph below for more comments
1053 Finally, if we have a valid textlow for the current file, we run
1054 down the partial_symtab_list filling in previous texthighs that
1055 are still unknown. */
1057 if (pst->texthigh == 0 && last_function_name) {
1060 struct minimal_symbol *minsym;
1062 p = strchr (last_function_name, ':');
1064 p = last_function_name;
1065 n = p - last_function_name;
1067 strncpy (p, last_function_name, n);
1070 minsym = lookup_minimal_symbol (p, objfile);
1073 pst->texthigh = SYMBOL_VALUE_ADDRESS(minsym)+(long)MSYMBOL_INFO(minsym);
1075 /* This file ends with a static function, and it's
1076 difficult to imagine how hard it would be to track down
1077 the elf symbol. Luckily, most of the time no one will notice,
1078 since the next file will likely be compiled with -g, so
1079 the code below will copy the first fuction's start address
1080 back to our texthigh variable. (Also, if this file is the
1081 last one in a dynamically linked program, texthigh already
1082 has the right value.) If the next file isn't compiled
1083 with -g, then the last function in this file winds up owning
1084 all of the text space up to the next -g file, or the end (minus
1085 shared libraries). This only matters for single stepping,
1086 and even then it will still work, except that it will single
1087 step through all of the covered functions, instead of setting
1088 breakpoints around them as it usualy does. This makes it
1089 pretty slow, but at least it doesn't fail.
1091 We can fix this with a fairly big change to bfd, but we need
1092 to coordinate better with Cygnus if we want to do that. FIXME. */
1094 last_function_name = NULL;
1097 /* this test will be true if the last .o file is only data */
1098 if (pst->textlow == 0)
1099 pst->textlow = pst->texthigh;
1101 /* If we know our own starting text address, then walk through all other
1102 psymtabs for this objfile, and if any didn't know their ending text
1103 address, set it to our starting address. Take care to not set our
1104 own ending address to our starting address, nor to set addresses on
1105 `dependency' files that have both textlow and texthigh zero. */
1107 ALL_OBJFILE_PSYMTABS (objfile, p1) {
1108 if (p1->texthigh == 0 && p1->textlow != 0 && p1 != pst) {
1109 p1->texthigh = pst->textlow;
1110 /* if this file has only data, then make textlow match texthigh */
1111 if (p1->textlow == 0)
1112 p1->textlow = p1->texthigh;
1117 /* End of kludge for patching Solaris textlow and texthigh. */
1119 pst->n_global_syms =
1120 objfile->global_psymbols.next - (objfile->global_psymbols.list + pst->globals_offset);
1121 pst->n_static_syms =
1122 objfile->static_psymbols.next - (objfile->static_psymbols.list + pst->statics_offset);
1124 pst->number_of_dependencies = number_dependencies;
1125 if (number_dependencies)
1127 pst->dependencies = (struct partial_symtab **)
1128 obstack_alloc (&objfile->psymbol_obstack,
1129 number_dependencies * sizeof (struct partial_symtab *));
1130 memcpy (pst->dependencies, dependency_list,
1131 number_dependencies * sizeof (struct partial_symtab *));
1134 pst->dependencies = 0;
1136 for (i = 0; i < num_includes; i++)
1138 struct partial_symtab *subpst =
1139 allocate_psymtab (include_list[i], objfile);
1141 subpst->section_offsets = pst->section_offsets;
1142 subpst->read_symtab_private =
1143 (char *) obstack_alloc (&objfile->psymbol_obstack,
1144 sizeof (struct symloc));
1148 subpst->texthigh = 0;
1150 /* We could save slight bits of space by only making one of these,
1151 shared by the entire set of include files. FIXME-someday. */
1152 subpst->dependencies = (struct partial_symtab **)
1153 obstack_alloc (&objfile->psymbol_obstack,
1154 sizeof (struct partial_symtab *));
1155 subpst->dependencies[0] = pst;
1156 subpst->number_of_dependencies = 1;
1158 subpst->globals_offset =
1159 subpst->n_global_syms =
1160 subpst->statics_offset =
1161 subpst->n_static_syms = 0;
1165 subpst->read_symtab = pst->read_symtab;
1168 sort_pst_symbols (pst);
1170 /* If there is already a psymtab or symtab for a file of this name,
1172 (If there is a symtab, more drastic things also happen.)
1173 This happens in VxWorks. */
1174 free_named_symtabs (pst->filename);
1176 if (num_includes == 0
1177 && number_dependencies == 0
1178 && pst->n_global_syms == 0
1179 && pst->n_static_syms == 0) {
1180 /* Throw away this psymtab, it's empty. We can't deallocate it, since
1181 it is on the obstack, but we can forget to chain it on the list. */
1182 struct partial_symtab *prev_pst;
1184 /* First, snip it out of the psymtab chain */
1186 if (pst->objfile->psymtabs == pst)
1187 pst->objfile->psymtabs = pst->next;
1189 for (prev_pst = pst->objfile->psymtabs; prev_pst; prev_pst = pst->next)
1190 if (prev_pst->next == pst)
1191 prev_pst->next = pst->next;
1193 /* Next, put it on a free list for recycling */
1194 pst->next = pst->objfile->free_psymtabs;
1195 pst->objfile->free_psymtabs = pst;
1197 /* Indicate that psymtab was thrown away. */
1198 pst = (struct partial_symtab *)NULL;
1204 os9k_psymtab_to_symtab_1 (pst)
1205 struct partial_symtab *pst;
1207 struct cleanup *old_chain;
1215 fprintf_unfiltered (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
1220 /* Read in all partial symtabs on which this one is dependent */
1221 for (i = 0; i < pst->number_of_dependencies; i++)
1222 if (!pst->dependencies[i]->readin)
1224 /* Inform about additional files that need to be read in. */
1227 fputs_filtered (" ", gdb_stdout);
1229 fputs_filtered ("and ", gdb_stdout);
1231 printf_filtered ("%s...", pst->dependencies[i]->filename);
1232 wrap_here (""); /* Flush output */
1233 gdb_flush (gdb_stdout);
1235 os9k_psymtab_to_symtab_1 (pst->dependencies[i]);
1238 if (LDSYMCNT(pst)) /* Otherwise it's a dummy */
1240 /* Init stuff necessary for reading in symbols */
1243 old_chain = make_cleanup (really_free_pendings, 0);
1245 /* Read in this file's symbols */
1246 os9k_read_ofile_symtab (pst);
1247 sort_symtab_syms (pst->symtab);
1248 do_cleanups (old_chain);
1254 /* Read in all of the symbols for a given psymtab for real.
1255 Be verbose about it if the user wants that. */
1258 os9k_psymtab_to_symtab (pst)
1259 struct partial_symtab *pst;
1268 fprintf_unfiltered (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
1273 if (LDSYMCNT(pst) || pst->number_of_dependencies)
1275 /* Print the message now, before reading the string table,
1276 to avoid disconcerting pauses. */
1279 printf_filtered ("Reading in symbols for %s...", pst->filename);
1280 gdb_flush (gdb_stdout);
1283 sym_bfd = pst->objfile->obfd;
1284 os9k_psymtab_to_symtab_1 (pst);
1286 /* Match with global symbols. This only needs to be done once,
1287 after all of the symtabs and dependencies have been read in. */
1288 scan_file_globals (pst->objfile);
1290 /* Finish up the debug error message. */
1292 printf_filtered ("done.\n");
1296 /* Read in a defined section of a specific object file's symbols. */
1298 os9k_read_ofile_symtab (pst)
1299 struct partial_symtab *pst;
1301 register struct internal_symstruct *bufp;
1303 unsigned max_symnum;
1305 struct objfile *objfile;
1306 int sym_offset; /* Offset to start of symbols to read */
1307 CORE_ADDR text_offset; /* Start of text segment for symbols */
1308 int text_size; /* Size of text segment for symbols */
1309 struct section_offsets *section_offsets;
1312 objfile = pst->objfile;
1313 sym_offset = LDSYMOFF(pst);
1314 max_symnum = LDSYMCNT(pst);
1315 text_offset = pst->textlow;
1316 text_size = pst->texthigh - pst->textlow;
1317 section_offsets = pst->section_offsets;
1319 current_objfile = objfile;
1320 subfile_stack = NULL;
1321 last_source_file = NULL;
1323 abfd = objfile->obfd;
1324 dbg_file = objfile->auxf2;
1327 /* It is necessary to actually read one symbol *before* the start
1328 of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
1329 occurs before the N_SO symbol.
1330 Detecting this in read_dbx_symtab
1331 would slow down initial readin, so we look for it here instead. */
1332 if (!processing_acc_compilation && sym_offset >= (int)symbol_size)
1334 fseek (objefile->auxf2, sym_offset, SEEK_CUR);
1335 fill_sym(objfile->auxf2, abfd);
1338 processing_gcc_compilation = 0;
1339 if (bufp->n_type == N_TEXT)
1341 if (STREQ (namestring, GCC_COMPILED_FLAG_SYMBOL))
1342 processing_gcc_compilation = 1;
1343 else if (STREQ (namestring, GCC2_COMPILED_FLAG_SYMBOL))
1344 processing_gcc_compilation = 2;
1347 /* Try to select a C++ demangling based on the compilation unit
1350 if (processing_gcc_compilation)
1352 if (AUTO_DEMANGLING)
1354 set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
1360 /* The N_SO starting this symtab is the first symbol, so we
1361 better not check the symbol before it. I'm not this can
1362 happen, but it doesn't hurt to check for it. */
1363 bfd_seek (symfile_bfd, sym_offset, SEEK_CUR);
1364 processing_gcc_compilation = 0;
1368 fseek(dbg_file, (long)sym_offset, 0);
1370 if (bufp->n_type != (unsigned char)N_SYM_SYM)
1371 error("First symbol in segment of executable not a source symbol");
1374 for (symnum = 0; symnum < max_symnum; symnum++)
1376 QUIT; /* Allow this to be interruptable */
1377 fill_sym(dbg_file, abfd);
1379 type = bufp->n_type;
1381 os9k_process_one_symbol (type, bufp->n_desc, bufp->n_value,
1382 bufp->n_strx, section_offsets, objfile);
1384 /* We skip checking for a new .o or -l file; that should never
1385 happen in this routine. */
1387 else if (type == N_TEXT)
1389 /* I don't think this code will ever be executed, because
1390 the GCC_COMPILED_FLAG_SYMBOL usually is right before
1391 the N_SO symbol which starts this source file.
1392 However, there is no reason not to accept
1393 the GCC_COMPILED_FLAG_SYMBOL anywhere. */
1395 if (STREQ (namestring, GCC_COMPILED_FLAG_SYMBOL))
1396 processing_gcc_compilation = 1;
1397 else if (STREQ (namestring, GCC2_COMPILED_FLAG_SYMBOL))
1398 processing_gcc_compilation = 2;
1400 if (AUTO_DEMANGLING)
1402 set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
1405 else if (type & N_EXT || type == (unsigned char)N_TEXT
1406 || type == (unsigned char)N_NBTEXT
1408 /* Global symbol: see if we came across a dbx defintion for
1409 a corresponding symbol. If so, store the value. Remove
1410 syms from the chain when their values are stored, but
1411 search the whole chain, as there may be several syms from
1412 different files with the same name. */
1413 /* This is probably not true. Since the files will be read
1414 in one at a time, each reference to a global symbol will
1415 be satisfied in each file as it appears. So we skip this
1422 current_objfile = NULL;
1424 /* In a Solaris elf file, this variable, which comes from the
1425 value of the N_SO symbol, will still be 0. Luckily, text_offset,
1426 which comes from pst->textlow is correct. */
1427 if (last_source_start_addr == 0)
1428 last_source_start_addr = text_offset;
1429 pst->symtab = end_symtab (text_offset + text_size, 0, 0, objfile,
1435 /* This handles a single symbol from the symbol-file, building symbols
1436 into a GDB symtab. It takes these arguments and an implicit argument.
1438 TYPE is the type field of the ".stab" symbol entry.
1439 DESC is the desc field of the ".stab" entry.
1440 VALU is the value field of the ".stab" entry.
1441 NAME is the symbol name, in our address space.
1442 SECTION_OFFSETS is a set of amounts by which the sections of this object
1443 file were relocated when it was loaded into memory.
1444 All symbols that refer
1445 to memory locations need to be offset by these amounts.
1446 OBJFILE is the object file from which we are reading symbols.
1447 It is used in end_symtab. */
1450 os9k_process_one_symbol (type, desc, valu, name, section_offsets, objfile)
1454 struct section_offsets *section_offsets;
1455 struct objfile *objfile;
1457 register struct context_stack *new;
1458 /* The stab type used for the definition of the last function.
1459 N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */
1460 static int function_stab_type = 0;
1463 /* Something is wrong if we see real data before
1464 seeing a source file name. */
1465 if (last_source_file == NULL && type != (unsigned char)N_SO)
1467 /* Ignore any symbols which appear before an N_SO symbol. Currently
1468 no one puts symbols there, but we should deal gracefully with the
1469 case. A complain()t might be in order (if !IGNORE_SYMBOL (type)),
1470 but this should not be an error (). */
1478 /* On most machines, the block addresses are relative to the
1479 N_SO, the linker did not relocate them (sigh). */
1480 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT);
1481 new = push_context (desc, valu);
1485 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT);
1486 new = pop_context();
1488 #if !defined (OS9K_VARIABLES_INSIDE_BLOCK)
1489 #define OS9K_VARIABLES_INSIDE_BLOCK(desc, gcc_p) 1
1492 if (!OS9K_VARIABLES_INSIDE_BLOCK(desc, processing_gcc_compilation))
1493 local_symbols = new->locals;
1495 if (context_stack_depth > 1)
1497 /* This is not the outermost LBRAC...RBRAC pair in the function,
1498 its local symbols preceded it, and are the ones just recovered
1499 from the context stack. Define the block for them (but don't
1500 bother if the block contains no symbols. Should we complain
1501 on blocks without symbols? I can't think of any useful purpose
1503 if (local_symbols != NULL)
1505 /* Muzzle a compiler bug that makes end < start. (which
1506 compilers? Is this ever harmful?). */
1507 if (new->start_addr > valu)
1509 complain (&lbrac_rbrac_complaint);
1510 new->start_addr = valu;
1512 /* Make a block for the local symbols within. */
1513 finish_block (0, &local_symbols, new->old_blocks,
1514 new->start_addr, valu, objfile);
1519 if (context_stack_depth == 0)
1521 within_function = 0;
1522 /* Make a block for the local symbols within. */
1523 finish_block (new->name, &local_symbols, new->old_blocks,
1524 new->start_addr, valu, objfile);
1528 /* attach local_symbols to the end of new->locals */
1529 if (!new->locals) new->locals = local_symbols;
1534 while (p->next) p = p->next;
1535 p->next = local_symbols;
1540 if (OS9K_VARIABLES_INSIDE_BLOCK(desc, processing_gcc_compilation))
1541 /* Now pop locals of block just finished. */
1542 local_symbols = new->locals;
1547 /* This type of "symbol" really just records
1548 one line-number -- core-address correspondence.
1549 Enter it in the line list for this symbol table. */
1550 /* Relocate for dynamic loading and for ELF acc fn-relative syms. */
1551 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT);
1552 record_line (current_subfile, (int)name, valu);
1555 /* The following symbol types need to have the appropriate offset added
1556 to their value; then we process symbol definitions in the name. */
1563 char *p = strchr (name, ':');
1573 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT);
1574 n = strrchr(name, '/');
1584 if (symfile_depth++ == 0) {
1585 if (last_source_file) {
1586 end_symtab (valu, 0, 0, objfile, SECT_OFF_TEXT);
1591 start_symtab (n, dirn, valu);
1594 start_subfile (n, dirn!=NULL ? dirn : current_subfile->dirname);
1600 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT);
1601 function_stab_type = type;
1603 within_function = 1;
1604 new = push_context (0, valu);
1605 new->name = define_symbol (valu, name, desc, type, objfile);
1610 valu += ANOFFSET (section_offsets, SECT_OFF_DATA);
1611 define_symbol (valu, name, desc, type, objfile);
1615 define_symbol (valu, name, desc, type, objfile);
1622 if (--symfile_depth != 0)
1623 start_subfile(pop_subfile(), current_subfile->dirname);
1627 complain (&unknown_symtype_complaint,
1628 local_hex_string((unsigned long) type));
1635 previous_stab_code = type;
1638 /* Parse the user's idea of an offset for dynamic linking, into our idea
1639 of how to represent it for fast symbol reading. */
1641 static struct section_offsets *
1642 os9k_symfile_offsets (objfile, addr)
1643 struct objfile *objfile;
1646 struct section_offsets *section_offsets;
1649 objfile->num_sections = SECT_OFF_MAX;
1650 section_offsets = (struct section_offsets *)
1651 obstack_alloc (&objfile -> psymbol_obstack,
1652 sizeof (struct section_offsets)
1653 + sizeof (section_offsets->offsets) * (SECT_OFF_MAX-1));
1655 for (i = 0; i < SECT_OFF_MAX; i++)
1656 ANOFFSET (section_offsets, i) = addr;
1658 return section_offsets;
1661 static struct sym_fns os9k_sym_fns =
1663 bfd_target_os9k_flavour,
1664 os9k_new_init, /* sym_new_init: init anything gbl to entire symtab */
1665 os9k_symfile_init, /* sym_init: read initial info, setup for sym_read() */
1666 os9k_symfile_read, /* sym_read: read a symbol file into symtab */
1667 os9k_symfile_finish, /* sym_finish: finished with file, cleanup */
1668 os9k_symfile_offsets, /* sym_offsets: parse user's offsets to internal form*/
1669 NULL /* next: pointer to next struct sym_fns */
1673 _initialize_os9kread ()
1675 add_symtab_fns(&os9k_sym_fns);