1 /* Read os9/os9k 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: os9k_symfile_init,
24 which initializes to read a symbol file; os9k_new_init, which
25 discards existing cached information when all symbols are being
26 discarded; and os9k_symfile_read, which reads a symbol table
29 os9k_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. os9k_psymtab_to_symtab() is the function that does this */
38 #include "gdb_string.h"
39 #include "gdb_assert.h"
42 #if defined(USG) || defined(__CYGNUSCLIB__)
43 #include <sys/types.h>
50 #include "breakpoint.h"
53 #include "gdbcore.h" /* for bfd stuff */
54 #include "libaout.h" /* FIXME Secret internal BFD stuff for a.out */
58 #include "gdb-stabs.h"
60 #include "language.h" /* Needed inside partial-stab.h */
61 #include "complaints.h"
63 #include "stabsread.h"
65 extern void _initialize_os9kread (void);
67 /* Each partial symbol table entry contains a pointer to private data for the
68 read_symtab() function to use when expanding a partial symbol table entry
69 to a full symbol table entry.
71 For dbxread this structure contains the offset within the file symbol table
72 of first local symbol for this file, and count of the section
73 of the symbol table devoted to this file's symbols (actually, the section
74 bracketed may contain more than just this file's symbols). It also contains
75 further information needed to locate the symbols if they are in an ELF file.
77 If ldsymcnt is 0, the only reason for this thing's existence is the
78 dependency list. Nothing else will happen when it is read in. */
80 #define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff)
81 #define LDSYMCNT(p) (((struct symloc *)((p)->read_symtab_private))->ldsymnum)
89 /* Remember what we deduced to be the source language of this psymtab. */
90 static enum language psymtab_language
= language_unknown
;
92 /* keep partial symbol table file nested depth */
93 static int psymfile_depth
= 0;
95 /* keep symbol table file nested depth */
96 static int symfile_depth
= 0;
98 /* Nonzero means give verbose info on gdb action. From main.c. */
99 extern int info_verbose
;
101 extern int previous_stab_code
;
103 /* Name of last function encountered. Used in Solaris to approximate
104 object file boundaries. */
105 static char *last_function_name
;
107 /* Complaints about the symbols we have encountered. */
108 extern struct complaint lbrac_complaint
;
110 extern struct complaint unknown_symtype_complaint
;
112 extern struct complaint unknown_symchar_complaint
;
114 extern struct complaint lbrac_rbrac_complaint
;
116 extern struct complaint repeated_header_complaint
;
118 extern struct complaint repeated_header_name_complaint
;
121 static struct complaint lbrac_unmatched_complaint
=
122 {"unmatched Increment Block Entry before symtab pos %d", 0, 0};
124 static struct complaint lbrac_mismatch_complaint
=
125 {"IBE/IDE symbol mismatch at symtab pos %d", 0, 0};
128 /* Local function prototypes */
130 static void read_minimal_symbols (struct objfile
*);
132 static void os9k_read_ofile_symtab (struct partial_symtab
*);
134 static void os9k_psymtab_to_symtab (struct partial_symtab
*);
136 static void os9k_psymtab_to_symtab_1 (struct partial_symtab
*);
138 static void read_os9k_psymtab (struct objfile
*, CORE_ADDR
, int);
140 static int fill_sym (FILE *, bfd
*);
142 static void os9k_symfile_init (struct objfile
*);
144 static void os9k_new_init (struct objfile
*);
146 static void os9k_symfile_read (struct objfile
*, int);
148 static void os9k_symfile_finish (struct objfile
*);
151 os9k_process_one_symbol (int, int, CORE_ADDR
, char *,
152 struct section_offsets
*, struct objfile
*);
154 static struct partial_symtab
*os9k_start_psymtab (struct objfile
*, char *,
156 struct partial_symbol
**,
157 struct partial_symbol
**);
159 static struct partial_symtab
*os9k_end_psymtab (struct partial_symtab
*,
160 char **, int, int, CORE_ADDR
,
161 struct partial_symtab
**,
164 static void record_minimal_symbol (char *, CORE_ADDR
, int, struct objfile
*);
166 #define HANDLE_RBRAC(val) \
167 if ((val) > pst->texthigh) pst->texthigh = (val);
169 #define SWAP_STBHDR(hdrp, abfd) \
171 (hdrp)->fmtno = bfd_get_16(abfd, (unsigned char *)&(hdrp)->fmtno); \
172 (hdrp)->crc = bfd_get_32(abfd, (unsigned char *)&(hdrp)->crc); \
173 (hdrp)->offset = bfd_get_32(abfd, (unsigned char *)&(hdrp)->offset); \
174 (hdrp)->nsym = bfd_get_32(abfd, (unsigned char *)&(hdrp)->nsym); \
176 #define SWAP_STBSYM(symp, abfd) \
178 (symp)->value = bfd_get_32(abfd, (unsigned char *)&(symp)->value); \
179 (symp)->type = bfd_get_16(abfd, (unsigned char *)&(symp)->type); \
180 (symp)->stroff = bfd_get_32(abfd, (unsigned char *)&(symp)->stroff); \
190 record_minimal_symbol (char *name
, CORE_ADDR address
, int type
,
191 struct objfile
*objfile
)
193 enum minimal_symbol_type ms_type
;
199 address
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
217 ms_type
= mst_unknown
;
221 prim_record_minimal_symbol (name
, address
, ms_type
, objfile
);
224 /* read and process .stb file and store in minimal symbol table */
225 typedef char mhhdr
[80];
242 #define STBSYMSIZE 10
245 read_minimal_symbols (struct objfile
*objfile
)
250 struct stbsymbol sym
;
252 char buf
[64], buf1
[128];
257 abfd
= objfile
->obfd
;
258 fread (&hdr
.comhdr
[0], sizeof (mhhdr
), 1, fp
);
273 fread (&hdr
.fmtno
, sizeof (hdr
.fmtno
), 1, fp
);
274 fread (&hdr
.crc
, sizeof (hdr
.crc
), 1, fp
);
275 fread (&hdr
.offset
, sizeof (hdr
.offset
), 1, fp
);
276 fread (&hdr
.nsym
, sizeof (hdr
.nsym
), 1, fp
);
277 SWAP_STBHDR (&hdr
, abfd
);
280 init_minimal_symbol_collection ();
282 for (i
= hdr
.nsym
; i
> 0; i
--)
284 fseek (fp
, (long) off
, 0);
285 fread (&sym
.value
, sizeof (sym
.value
), 1, fp
);
286 fread (&sym
.type
, sizeof (sym
.type
), 1, fp
);
287 fread (&sym
.stroff
, sizeof (sym
.stroff
), 1, fp
);
288 SWAP_STBSYM (&sym
, abfd
);
289 fseek (fp
, (long) sym
.stroff
, 0);
300 record_minimal_symbol (buf1
, sym
.value
, sym
.type
& 7, objfile
);
303 install_minimal_symbols (objfile
);
307 /* Scan and build partial symbols for a symbol file.
308 We have been initialized by a call to os9k_symfile_init, which
309 put all the relevant info into a "struct os9k_symfile_info",
310 hung off the objfile structure.
312 MAINLINE is true if we are reading the main symbol
313 table (as opposed to a shared lib or dynamically loaded file). */
316 os9k_symfile_read (struct objfile
*objfile
, int mainline
)
319 struct cleanup
*back_to
;
321 sym_bfd
= objfile
->obfd
;
322 /* If we are reinitializing, or if we have never loaded syms yet, init */
323 if (mainline
|| objfile
->global_psymbols
.size
== 0 ||
324 objfile
->static_psymbols
.size
== 0)
325 init_psymbol_list (objfile
, DBX_SYMCOUNT (objfile
));
327 free_pending_blocks ();
328 back_to
= make_cleanup (really_free_pendings
, 0);
330 make_cleanup_discard_minimal_symbols ();
331 read_minimal_symbols (objfile
);
333 /* Now that the symbol table data of the executable file are all in core,
334 process them and define symbols accordingly. */
335 read_os9k_psymtab (objfile
,
336 DBX_TEXT_ADDR (objfile
),
337 DBX_TEXT_SIZE (objfile
));
339 do_cleanups (back_to
);
342 /* Initialize anything that needs initializing when a completely new
343 symbol file is specified (not just adding some symbols from another
344 file, e.g. a shared library). */
347 os9k_new_init (struct objfile
*ignore
)
349 stabsread_new_init ();
350 buildsym_new_init ();
353 init_header_files ();
357 /* os9k_symfile_init ()
358 It is passed a struct objfile which contains, among other things,
359 the BFD for the file whose symbols are being read, and a slot for a pointer
360 to "private data" which we fill with goodies.
362 Since BFD doesn't know how to read debug symbols in a format-independent
363 way (and may never do so...), we have to do it ourselves. We will never
364 be called unless this is an a.out (or very similar) file.
365 FIXME, there should be a cleaner peephole into the BFD environment here. */
368 os9k_symfile_init (struct objfile
*objfile
)
370 bfd
*sym_bfd
= objfile
->obfd
;
371 char *name
= bfd_get_filename (sym_bfd
);
372 char dbgname
[512], stbname
[512];
377 strcpy (dbgname
, name
);
378 strcat (dbgname
, ".dbg");
379 strcpy (stbname
, name
);
380 strcat (stbname
, ".stb");
382 if ((symfile
= fopen (dbgname
, "r")) == NULL
)
384 warning ("Symbol file %s not found", dbgname
);
386 objfile
->auxf2
= symfile
;
388 if ((minfile
= fopen (stbname
, "r")) == NULL
)
390 warning ("Symbol file %s not found", stbname
);
392 objfile
->auxf1
= minfile
;
394 /* Allocate struct to keep track of the symfile */
395 objfile
->sym_stab_info
= (struct dbx_symfile_info
*)
396 xmmalloc (objfile
->md
, sizeof (struct dbx_symfile_info
));
397 DBX_SYMFILE_INFO (objfile
)->stab_section_info
= NULL
;
399 text_sect
= bfd_get_section_by_name (sym_bfd
, ".text");
401 error ("Can't find .text section in file");
402 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
403 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
405 DBX_SYMBOL_SIZE (objfile
) = 0; /* variable size symbol */
406 DBX_SYMCOUNT (objfile
) = 0; /* used to be bfd_get_symcount(sym_bfd) */
407 DBX_SYMTAB_OFFSET (objfile
) = 0; /* used to be SYMBOL_TABLE_OFFSET */
410 /* Perform any local cleanups required when we are done with a particular
411 objfile. I.E, we are in the process of discarding all symbol information
412 for an objfile, freeing up all memory held for it, and unlinking the
413 objfile struct from the global list of known objfiles. */
416 os9k_symfile_finish (struct objfile
*objfile
)
418 if (objfile
->sym_stab_info
!= NULL
)
420 mfree (objfile
->md
, objfile
->sym_stab_info
);
423 free_header_files ();
436 #define SYNC (int)0xefbefeca
438 #define SWAP_DBGHDR(hdrp, abfd) \
440 (hdrp)->sync = bfd_get_32(abfd, (unsigned char *)&(hdrp)->sync); \
441 (hdrp)->rev = bfd_get_16(abfd, (unsigned char *)&(hdrp)->rev); \
442 (hdrp)->crc = bfd_get_32(abfd, (unsigned char *)&(hdrp)->crc); \
443 (hdrp)->os = bfd_get_16(abfd, (unsigned char *)&(hdrp)->os); \
444 (hdrp)->cpu = bfd_get_16(abfd, (unsigned char *)&(hdrp)->cpu); \
447 #define N_SYM_CMPLR 0
448 #define N_SYM_SLINE 1
450 #define N_SYM_LBRAC 3
451 #define N_SYM_RBRAC 4
454 struct internal_symstruct
461 static struct internal_symstruct symbol
;
462 static struct internal_symstruct
*symbuf
= &symbol
;
463 static char strbuf
[4096];
464 static struct st_dbghdr dbghdr
;
465 static short cmplrid
;
467 #define VER_PRE_ULTRAC ((short)4)
468 #define VER_ULTRAC ((short)5)
471 fill_sym (FILE *dbg_file
, bfd
*abfd
)
478 int nbytes
= fread (&si
, sizeof (si
), 1, dbg_file
);
482 perror_with_name ("reading .dbg file.");
485 symbuf
->n_strx
= NULL
;
486 symbuf
->n_type
= bfd_get_16 (abfd
, (unsigned char *) &si
);
487 symbuf
->n_type
= 0xf & symbuf
->n_type
;
488 switch (symbuf
->n_type
)
491 fread (&si
, sizeof (si
), 1, dbg_file
);
492 symbuf
->n_desc
= bfd_get_16 (abfd
, (unsigned char *) &si
);
493 cmplrid
= symbuf
->n_desc
& 0xff;
496 fread (&li
, sizeof (li
), 1, dbg_file
);
497 symbuf
->n_value
= bfd_get_32 (abfd
, (unsigned char *) &li
);
498 fread (&li
, sizeof (li
), 1, dbg_file
);
499 li
= bfd_get_32 (abfd
, (unsigned char *) &li
);
500 symbuf
->n_strx
= (char *) (li
>> 12);
501 symbuf
->n_desc
= li
& 0xfff;
504 fread (&li
, sizeof (li
), 1, dbg_file
);
505 symbuf
->n_value
= bfd_get_32 (abfd
, (unsigned char *) &li
);
509 ii
= getc (dbg_file
);
510 strbuf
[si
++] = (char) ii
;
512 while (ii
!= 0 || si
% 2 != 0);
513 symbuf
->n_strx
= strbuf
;
514 p
= (char *) strchr (strbuf
, ':');
517 if ((p
[1] == 'F' || p
[1] == 'f') && cmplrid
== VER_PRE_ULTRAC
)
519 fread (&si
, sizeof (si
), 1, dbg_file
);
520 nmask
= bfd_get_16 (abfd
, (unsigned char *) &si
);
521 for (ii
= 0; ii
< nmask
; ii
++)
522 fread (&si
, sizeof (si
), 1, dbg_file
);
526 fread (&li
, sizeof (li
), 1, dbg_file
);
527 symbuf
->n_value
= bfd_get_32 (abfd
, (unsigned char *) &li
);
530 fread (&li
, sizeof (li
), 1, dbg_file
);
531 symbuf
->n_value
= bfd_get_32 (abfd
, (unsigned char *) &li
);
539 /* Given pointers to an a.out symbol table in core containing dbx
540 style data, setup partial_symtab's describing each source file for
541 which debugging information is available.
542 SYMFILE_NAME is the name of the file we are reading from. */
545 read_os9k_psymtab (struct objfile
*objfile
, CORE_ADDR text_addr
, int text_size
)
547 register struct internal_symstruct
*bufp
= 0; /* =0 avoids gcc -Wall glitch */
548 register char *namestring
;
549 int past_first_source_file
= 0;
550 CORE_ADDR last_o_file_start
= 0;
552 struct cleanup
*back_to
;
557 /* End of the text segment of the executable file. */
558 static CORE_ADDR end_of_text_addr
;
560 /* Current partial symtab */
561 static struct partial_symtab
*pst
= 0;
563 /* List of current psymtab's include files */
564 char **psymtab_include_list
;
565 int includes_allocated
;
568 /* Index within current psymtab dependency list */
569 struct partial_symtab
**dependency_list
;
570 int dependencies_used
, dependencies_allocated
;
572 includes_allocated
= 30;
574 psymtab_include_list
= (char **) alloca (includes_allocated
*
577 dependencies_allocated
= 30;
578 dependencies_used
= 0;
580 (struct partial_symtab
**) alloca (dependencies_allocated
*
581 sizeof (struct partial_symtab
*));
583 last_source_file
= NULL
;
585 #ifdef END_OF_TEXT_DEFAULT
586 end_of_text_addr
= END_OF_TEXT_DEFAULT
;
588 end_of_text_addr
= text_addr
+ ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
))
589 + text_size
; /* Relocate */
592 abfd
= objfile
->obfd
;
597 fread (&dbghdr
.sync
, sizeof (dbghdr
.sync
), 1, fp
);
598 fread (&dbghdr
.rev
, sizeof (dbghdr
.rev
), 1, fp
);
599 fread (&dbghdr
.crc
, sizeof (dbghdr
.crc
), 1, fp
);
600 fread (&dbghdr
.os
, sizeof (dbghdr
.os
), 1, fp
);
601 fread (&dbghdr
.cpu
, sizeof (dbghdr
.cpu
), 1, fp
);
602 SWAP_DBGHDR (&dbghdr
, abfd
);
610 /* Get the symbol for this run and pull out some info */
611 QUIT
; /* allow this to be interruptable */
612 cursymoffset
= ftell (objfile
->auxf2
);
613 ret
= fill_sym (objfile
->auxf2
, abfd
);
620 /* Special case to speed up readin. */
621 if (bufp
->n_type
== (short) N_SYM_SLINE
)
624 #define CUR_SYMBOL_VALUE bufp->n_value
627 switch (bufp
->n_type
)
635 CUR_SYMBOL_VALUE
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
636 if (psymfile_depth
== 1 && pst
)
638 os9k_end_psymtab (pst
, psymtab_include_list
, includes_used
,
639 symnum
, CUR_SYMBOL_VALUE
,
640 dependency_list
, dependencies_used
);
641 pst
= (struct partial_symtab
*) 0;
643 dependencies_used
= 0;
648 case N_SYM_SYM
: /* Typedef or automatic variable. */
649 namestring
= bufp
->n_strx
;
650 p
= (char *) strchr (namestring
, ':');
652 continue; /* Not a debugging symbol. */
654 /* Main processing section for debugging symbols which
655 the initial read through the symbol tables needs to worry
656 about. If we reach this point, the symbol which we are
657 considering is definitely one we are interested in.
658 p must also contain the (valid) index into the namestring
659 which indicates the debugging type symbol. */
666 enum language tmp_language
;
670 valu
= CUR_SYMBOL_VALUE
;
672 valu
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
673 past_first_source_file
= 1;
675 p
= strchr (namestring
, ':');
679 n
= strlen (namestring
);
680 str
= alloca (n
+ 1);
681 strncpy (str
, namestring
, n
);
684 if (psymfile_depth
== 0)
687 pst
= os9k_start_psymtab (objfile
,
691 objfile
->global_psymbols
.next
,
692 objfile
->static_psymbols
.next
);
695 { /* this is a include file */
696 tmp_language
= deduce_language_from_filename (str
);
697 if (tmp_language
!= language_unknown
698 && (tmp_language
!= language_c
699 || psymtab_language
!= language_cplus
))
700 psymtab_language
= tmp_language
;
703 if (pst && STREQ (str, pst->filename))
707 for (i = 0; i < includes_used; i++)
708 if (STREQ (str, psymtab_include_list[i]))
718 psymtab_include_list
[includes_used
++] = str
;
719 if (includes_used
>= includes_allocated
)
721 char **orig
= psymtab_include_list
;
723 psymtab_include_list
= (char **)
724 alloca ((includes_allocated
*= 2) * sizeof (char *));
725 memcpy ((PTR
) psymtab_include_list
, (PTR
) orig
,
726 includes_used
* sizeof (char *));
735 add_psymbol_to_list (namestring
, p
- namestring
,
736 VAR_NAMESPACE
, LOC_STATIC
,
737 &objfile
->static_psymbols
,
739 psymtab_language
, objfile
);
742 add_psymbol_to_list (namestring
, p
- namestring
,
743 VAR_NAMESPACE
, LOC_STATIC
,
744 &objfile
->global_psymbols
,
746 psymtab_language
, objfile
);
750 if (p
!= namestring
) /* a name is there, not just :T... */
752 add_psymbol_to_list (namestring
, p
- namestring
,
753 STRUCT_NAMESPACE
, LOC_TYPEDEF
,
754 &objfile
->static_psymbols
,
756 psymtab_language
, objfile
);
759 /* Also a typedef with the same name. */
760 add_psymbol_to_list (namestring
, p
- namestring
,
761 VAR_NAMESPACE
, LOC_TYPEDEF
,
762 &objfile
->static_psymbols
,
763 CUR_SYMBOL_VALUE
, 0, psymtab_language
,
767 /* The semantics of C++ state that "struct foo { ... }"
768 also defines a typedef for "foo". Unfortuantely, cfront
769 never makes the typedef when translating from C++ to C.
770 We make the typedef here so that "ptype foo" works as
771 expected for cfront translated code. */
772 else if (psymtab_language
== language_cplus
)
774 /* Also a typedef with the same name. */
775 add_psymbol_to_list (namestring
, p
- namestring
,
776 VAR_NAMESPACE
, LOC_TYPEDEF
,
777 &objfile
->static_psymbols
,
778 CUR_SYMBOL_VALUE
, 0, psymtab_language
,
784 if (p
!= namestring
) /* a name is there, not just :T... */
786 add_psymbol_to_list (namestring
, p
- namestring
,
787 VAR_NAMESPACE
, LOC_TYPEDEF
,
788 &objfile
->static_psymbols
,
790 psymtab_language
, objfile
);
793 /* If this is an enumerated type, we need to
794 add all the enum constants to the partial symbol
795 table. This does not cover enums without names, e.g.
796 "enum {a, b} c;" in C, but fortunately those are
797 rare. There is no way for GDB to find those from the
798 enum type without spending too much time on it. Thus
799 to solve this problem, the compiler needs to put out the
800 enum in a nameless type. GCC2 does this. */
802 /* We are looking for something of the form
803 <name> ":" ("t" | "T") [<number> "="] "e" <size>
804 {<constant> ":" <value> ","} ";". */
806 /* Skip over the colon and the 't' or 'T'. */
808 /* This type may be given a number. Also, numbers can come
809 in pairs like (0,26). Skip over it. */
810 while ((*p
>= '0' && *p
<= '9')
811 || *p
== '(' || *p
== ',' || *p
== ')'
817 /* We have found an enumerated type. skip size */
818 while (*p
>= '0' && *p
<= '9')
820 /* According to comments in read_enum_type
821 a comma could end it instead of a semicolon.
822 I don't know where that happens.
824 while (*p
&& *p
!= ';' && *p
!= ',')
828 /* Check for and handle cretinous dbx symbol name
831 p = next_symbol_text (objfile);
834 /* Point to the character after the name
835 of the enum constant. */
836 for (q
= p
; *q
&& *q
!= ':'; q
++)
838 /* Note that the value doesn't matter for
839 enum constants in psymtabs, just in symtabs. */
840 add_psymbol_to_list (p
, q
- p
,
841 VAR_NAMESPACE
, LOC_CONST
,
842 &objfile
->static_psymbols
, 0,
843 0, psymtab_language
, objfile
);
844 /* Point past the name. */
846 /* Skip over the value. */
847 while (*p
&& *p
!= ',')
849 /* Advance past the comma. */
856 /* Constant, e.g. from "const" in Pascal. */
857 add_psymbol_to_list (namestring
, p
- namestring
,
858 VAR_NAMESPACE
, LOC_CONST
,
859 &objfile
->static_psymbols
, CUR_SYMBOL_VALUE
,
860 0, psymtab_language
, objfile
);
864 CUR_SYMBOL_VALUE
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
865 if (pst
&& pst
->textlow
== 0)
866 pst
->textlow
= CUR_SYMBOL_VALUE
;
868 add_psymbol_to_list (namestring
, p
- namestring
,
869 VAR_NAMESPACE
, LOC_BLOCK
,
870 &objfile
->static_psymbols
, CUR_SYMBOL_VALUE
,
871 0, psymtab_language
, objfile
);
875 CUR_SYMBOL_VALUE
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
876 if (pst
&& pst
->textlow
== 0)
877 pst
->textlow
= CUR_SYMBOL_VALUE
;
879 add_psymbol_to_list (namestring
, p
- namestring
,
880 VAR_NAMESPACE
, LOC_BLOCK
,
881 &objfile
->global_psymbols
, CUR_SYMBOL_VALUE
,
882 0, psymtab_language
, objfile
);
891 /* It is a C++ nested symbol. We don't need to record it
892 (I don't think); if we try to look up foo::bar::baz,
893 then symbols for the symtab containing foo should get
895 /* Someone says sun cc puts out symbols like
896 /foo/baz/maclib::/usr/local/bin/maclib,
897 which would get here with a symbol type of ':'. */
901 /* Unexpected symbol descriptor. The second and subsequent stabs
902 of a continued stab can show up here. The question is
903 whether they ever can mimic a normal stab--it would be
904 nice if not, since we certainly don't want to spend the
905 time searching to the end of every string looking for
908 complain (&unknown_symchar_complaint
, p
[1]);
913 CUR_SYMBOL_VALUE
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
915 HANDLE_RBRAC (CUR_SYMBOL_VALUE
);
922 /* If we haven't found it yet, ignore it. It's probably some
923 new type we don't know about yet. */
924 complain (&unknown_symtype_complaint
,
925 local_hex_string ((unsigned long) bufp
->n_type
));
930 DBX_SYMCOUNT (objfile
) = symnum
;
932 /* If there's stuff to be cleaned up, clean it up. */
933 if (DBX_SYMCOUNT (objfile
) > 0
934 /*FIXME, does this have a bug at start address 0? */
936 && objfile
->ei
.entry_point
< bufp
->n_value
937 && objfile
->ei
.entry_point
>= last_o_file_start
)
939 objfile
->ei
.entry_file_lowpc
= last_o_file_start
;
940 objfile
->ei
.entry_file_highpc
= bufp
->n_value
;
945 os9k_end_psymtab (pst
, psymtab_include_list
, includes_used
,
946 symnum
, end_of_text_addr
,
947 dependency_list
, dependencies_used
);
950 do_cleanups (back_to);
954 /* Allocate and partially fill a partial symtab. It will be
955 completely filled at the end of the symbol list.
957 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
958 is the address relative to which its symbols are (incremental) or 0
962 static struct partial_symtab
*
963 os9k_start_psymtab (struct objfile
*objfile
, char *filename
, CORE_ADDR textlow
,
964 int ldsymoff
, int ldsymcnt
,
965 struct partial_symbol
**global_syms
,
966 struct partial_symbol
**static_syms
)
968 struct partial_symtab
*result
=
969 start_psymtab_common (objfile
, objfile
->section_offsets
,
970 filename
, textlow
, global_syms
, static_syms
);
972 result
->read_symtab_private
= (char *)
973 obstack_alloc (&objfile
->psymbol_obstack
, sizeof (struct symloc
));
975 LDSYMOFF (result
) = ldsymoff
;
976 LDSYMCNT (result
) = ldsymcnt
;
977 result
->read_symtab
= os9k_psymtab_to_symtab
;
979 /* Deduce the source language from the filename for this psymtab. */
980 psymtab_language
= deduce_language_from_filename (filename
);
984 /* Close off the current usage of PST.
985 Returns PST or NULL if the partial symtab was empty and thrown away.
986 FIXME: List variables and peculiarities of same. */
988 static struct partial_symtab
*
989 os9k_end_psymtab (struct partial_symtab
*pst
, char **include_list
,
990 int num_includes
, int capping_symbol_cnt
,
991 CORE_ADDR capping_text
,
992 struct partial_symtab
**dependency_list
,
993 int number_dependencies
)
996 struct partial_symtab
*p1
;
997 struct objfile
*objfile
= pst
->objfile
;
999 if (capping_symbol_cnt
!= -1)
1000 LDSYMCNT (pst
) = capping_symbol_cnt
- LDSYMCNT (pst
);
1002 /* Under Solaris, the N_SO symbols always have a value of 0,
1003 instead of the usual address of the .o file. Therefore,
1004 we have to do some tricks to fill in texthigh and textlow.
1005 The first trick is in partial-stab.h: if we see a static
1006 or global function, and the textlow for the current pst
1007 is still 0, then we use that function's address for
1008 the textlow of the pst.
1010 Now, to fill in texthigh, we remember the last function seen
1011 in the .o file (also in partial-stab.h). Also, there's a hack in
1012 bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
1013 to here via the misc_info field. Therefore, we can fill in
1014 a reliable texthigh by taking the address plus size of the
1015 last function in the file.
1017 Unfortunately, that does not cover the case where the last function
1018 in the file is static. See the paragraph below for more comments
1021 Finally, if we have a valid textlow for the current file, we run
1022 down the partial_symtab_list filling in previous texthighs that
1023 are still unknown. */
1025 if (pst
->texthigh
== 0 && last_function_name
)
1029 struct minimal_symbol
*minsym
;
1031 p
= strchr (last_function_name
, ':');
1033 p
= last_function_name
;
1034 n
= p
- last_function_name
;
1036 strncpy (p
, last_function_name
, n
);
1039 minsym
= lookup_minimal_symbol (p
, NULL
, objfile
);
1043 pst
->texthigh
= SYMBOL_VALUE_ADDRESS (minsym
) + (long) MSYMBOL_INFO (minsym
);
1047 /* This file ends with a static function, and it's
1048 difficult to imagine how hard it would be to track down
1049 the elf symbol. Luckily, most of the time no one will notice,
1050 since the next file will likely be compiled with -g, so
1051 the code below will copy the first fuction's start address
1052 back to our texthigh variable. (Also, if this file is the
1053 last one in a dynamically linked program, texthigh already
1054 has the right value.) If the next file isn't compiled
1055 with -g, then the last function in this file winds up owning
1056 all of the text space up to the next -g file, or the end (minus
1057 shared libraries). This only matters for single stepping,
1058 and even then it will still work, except that it will single
1059 step through all of the covered functions, instead of setting
1060 breakpoints around them as it usualy does. This makes it
1061 pretty slow, but at least it doesn't fail.
1063 We can fix this with a fairly big change to bfd, but we need
1064 to coordinate better with Cygnus if we want to do that. FIXME. */
1066 last_function_name
= NULL
;
1069 /* this test will be true if the last .o file is only data */
1070 if (pst
->textlow
== 0)
1071 pst
->textlow
= pst
->texthigh
;
1073 /* If we know our own starting text address, then walk through all other
1074 psymtabs for this objfile, and if any didn't know their ending text
1075 address, set it to our starting address. Take care to not set our
1076 own ending address to our starting address, nor to set addresses on
1077 `dependency' files that have both textlow and texthigh zero. */
1080 ALL_OBJFILE_PSYMTABS (objfile
, p1
)
1082 if (p1
->texthigh
== 0 && p1
->textlow
!= 0 && p1
!= pst
)
1084 p1
->texthigh
= pst
->textlow
;
1085 /* if this file has only data, then make textlow match texthigh */
1086 if (p1
->textlow
== 0)
1087 p1
->textlow
= p1
->texthigh
;
1092 /* End of kludge for patching Solaris textlow and texthigh. */
1094 pst
->n_global_syms
=
1095 objfile
->global_psymbols
.next
- (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
1096 pst
->n_static_syms
=
1097 objfile
->static_psymbols
.next
- (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
1099 pst
->number_of_dependencies
= number_dependencies
;
1100 if (number_dependencies
)
1102 pst
->dependencies
= (struct partial_symtab
**)
1103 obstack_alloc (&objfile
->psymbol_obstack
,
1104 number_dependencies
* sizeof (struct partial_symtab
*));
1105 memcpy (pst
->dependencies
, dependency_list
,
1106 number_dependencies
* sizeof (struct partial_symtab
*));
1109 pst
->dependencies
= 0;
1111 for (i
= 0; i
< num_includes
; i
++)
1113 struct partial_symtab
*subpst
=
1114 allocate_psymtab (include_list
[i
], objfile
);
1116 subpst
->section_offsets
= pst
->section_offsets
;
1117 subpst
->read_symtab_private
=
1118 (char *) obstack_alloc (&objfile
->psymbol_obstack
,
1119 sizeof (struct symloc
));
1123 subpst
->texthigh
= 0;
1125 /* We could save slight bits of space by only making one of these,
1126 shared by the entire set of include files. FIXME-someday. */
1127 subpst
->dependencies
= (struct partial_symtab
**)
1128 obstack_alloc (&objfile
->psymbol_obstack
,
1129 sizeof (struct partial_symtab
*));
1130 subpst
->dependencies
[0] = pst
;
1131 subpst
->number_of_dependencies
= 1;
1133 subpst
->globals_offset
=
1134 subpst
->n_global_syms
=
1135 subpst
->statics_offset
=
1136 subpst
->n_static_syms
= 0;
1140 subpst
->read_symtab
= pst
->read_symtab
;
1143 sort_pst_symbols (pst
);
1145 /* If there is already a psymtab or symtab for a file of this name,
1147 (If there is a symtab, more drastic things also happen.)
1148 This happens in VxWorks. */
1149 free_named_symtabs (pst
->filename
);
1151 if (num_includes
== 0
1152 && number_dependencies
== 0
1153 && pst
->n_global_syms
== 0
1154 && pst
->n_static_syms
== 0)
1156 /* Throw away this psymtab, it's empty. We can't deallocate it, since
1157 it is on the obstack, but we can forget to chain it on the list. */
1158 /* Indicate that psymtab was thrown away. */
1160 discard_psymtab (pst
);
1162 pst
= (struct partial_symtab
*) NULL
;
1168 os9k_psymtab_to_symtab_1 (struct partial_symtab
*pst
)
1170 struct cleanup
*old_chain
;
1178 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1183 /* Read in all partial symtabs on which this one is dependent */
1184 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
1185 if (!pst
->dependencies
[i
]->readin
)
1187 /* Inform about additional files that need to be read in. */
1190 fputs_filtered (" ", gdb_stdout
);
1192 fputs_filtered ("and ", gdb_stdout
);
1194 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
1195 wrap_here (""); /* Flush output */
1196 gdb_flush (gdb_stdout
);
1198 os9k_psymtab_to_symtab_1 (pst
->dependencies
[i
]);
1201 if (LDSYMCNT (pst
)) /* Otherwise it's a dummy */
1203 /* Init stuff necessary for reading in symbols */
1206 old_chain
= make_cleanup (really_free_pendings
, 0);
1208 /* Read in this file's symbols */
1209 os9k_read_ofile_symtab (pst
);
1210 sort_symtab_syms (pst
->symtab
);
1211 do_cleanups (old_chain
);
1217 /* Read in all of the symbols for a given psymtab for real.
1218 Be verbose about it if the user wants that. */
1221 os9k_psymtab_to_symtab (struct partial_symtab
*pst
)
1230 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1235 if (LDSYMCNT (pst
) || pst
->number_of_dependencies
)
1237 /* Print the message now, before reading the string table,
1238 to avoid disconcerting pauses. */
1241 printf_filtered ("Reading in symbols for %s...", pst
->filename
);
1242 gdb_flush (gdb_stdout
);
1245 sym_bfd
= pst
->objfile
->obfd
;
1246 os9k_psymtab_to_symtab_1 (pst
);
1248 /* Match with global symbols. This only needs to be done once,
1249 after all of the symtabs and dependencies have been read in. */
1250 scan_file_globals (pst
->objfile
);
1252 /* Finish up the debug error message. */
1254 printf_filtered ("done.\n");
1258 /* Read in a defined section of a specific object file's symbols. */
1260 os9k_read_ofile_symtab (struct partial_symtab
*pst
)
1262 register struct internal_symstruct
*bufp
;
1264 unsigned max_symnum
;
1266 struct objfile
*objfile
;
1267 int sym_offset
; /* Offset to start of symbols to read */
1268 CORE_ADDR text_offset
; /* Start of text segment for symbols */
1269 int text_size
; /* Size of text segment for symbols */
1272 objfile
= pst
->objfile
;
1273 sym_offset
= LDSYMOFF (pst
);
1274 max_symnum
= LDSYMCNT (pst
);
1275 text_offset
= pst
->textlow
;
1276 text_size
= pst
->texthigh
- pst
->textlow
;
1278 current_objfile
= objfile
;
1279 subfile_stack
= NULL
;
1280 last_source_file
= NULL
;
1282 abfd
= objfile
->obfd
;
1283 dbg_file
= objfile
->auxf2
;
1286 /* It is necessary to actually read one symbol *before* the start
1287 of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
1288 occurs before the N_SO symbol.
1289 Detecting this in read_dbx_symtab
1290 would slow down initial readin, so we look for it here instead. */
1291 if (!processing_acc_compilation
&& sym_offset
>= (int) symbol_size
)
1293 fseek (objefile
->auxf2
, sym_offset
, SEEK_CUR
);
1294 fill_sym (objfile
->auxf2
, abfd
);
1297 processing_gcc_compilation
= 0;
1298 if (bufp
->n_type
== N_TEXT
)
1300 if (STREQ (namestring
, GCC_COMPILED_FLAG_SYMBOL
))
1301 processing_gcc_compilation
= 1;
1302 else if (STREQ (namestring
, GCC2_COMPILED_FLAG_SYMBOL
))
1303 processing_gcc_compilation
= 2;
1306 /* Try to select a C++ demangling based on the compilation unit
1309 if (processing_gcc_compilation
)
1311 if (AUTO_DEMANGLING
)
1313 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
1319 /* The N_SO starting this symtab is the first symbol, so we
1320 better not check the symbol before it. I'm not this can
1321 happen, but it doesn't hurt to check for it. */
1322 bfd_seek (symfile_bfd
, sym_offset
, SEEK_CUR
);
1323 processing_gcc_compilation
= 0;
1327 fseek (dbg_file
, (long) sym_offset
, 0);
1329 if (bufp->n_type != (unsigned char)N_SYM_SYM)
1330 error("First symbol in segment of executable not a source symbol");
1333 for (symnum
= 0; symnum
< max_symnum
; symnum
++)
1335 QUIT
; /* Allow this to be interruptable */
1336 fill_sym (dbg_file
, abfd
);
1338 type
= bufp
->n_type
;
1340 os9k_process_one_symbol ((int) type
, (int) bufp
->n_desc
,
1341 (CORE_ADDR
) bufp
->n_value
, bufp
->n_strx
, pst
->section_offsets
, objfile
);
1343 /* We skip checking for a new .o or -l file; that should never
1344 happen in this routine. */
1349 /* I don't think this code will ever be executed, because
1350 the GCC_COMPILED_FLAG_SYMBOL usually is right before
1351 the N_SO symbol which starts this source file.
1352 However, there is no reason not to accept
1353 the GCC_COMPILED_FLAG_SYMBOL anywhere. */
1355 if (STREQ (namestring
, GCC_COMPILED_FLAG_SYMBOL
))
1356 processing_gcc_compilation
= 1;
1357 else if (STREQ (namestring
, GCC2_COMPILED_FLAG_SYMBOL
))
1358 processing_gcc_compilation
= 2;
1360 if (AUTO_DEMANGLING
)
1362 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
1365 else if (type
& N_EXT
|| type
== (unsigned char) N_TEXT
1366 || type
== (unsigned char) N_NBTEXT
1369 /* Global symbol: see if we came across a dbx defintion for
1370 a corresponding symbol. If so, store the value. Remove
1371 syms from the chain when their values are stored, but
1372 search the whole chain, as there may be several syms from
1373 different files with the same name. */
1374 /* This is probably not true. Since the files will be read
1375 in one at a time, each reference to a global symbol will
1376 be satisfied in each file as it appears. So we skip this
1383 current_objfile
= NULL
;
1385 /* In a Solaris elf file, this variable, which comes from the
1386 value of the N_SO symbol, will still be 0. Luckily, text_offset,
1387 which comes from pst->textlow is correct. */
1388 if (last_source_start_addr
== 0)
1389 last_source_start_addr
= text_offset
;
1390 pst
->symtab
= end_symtab (text_offset
+ text_size
, objfile
, SECT_OFF_TEXT (objfile
));
1395 /* This handles a single symbol from the symbol-file, building symbols
1396 into a GDB symtab. It takes these arguments and an implicit argument.
1398 TYPE is the type field of the ".stab" symbol entry.
1399 DESC is the desc field of the ".stab" entry.
1400 VALU is the value field of the ".stab" entry.
1401 NAME is the symbol name, in our address space.
1402 SECTION_OFFSETS is a set of amounts by which the sections of this object
1403 file were relocated when it was loaded into memory.
1404 All symbols that refer
1405 to memory locations need to be offset by these amounts.
1406 OBJFILE is the object file from which we are reading symbols.
1407 It is used in end_symtab. */
1410 os9k_process_one_symbol (int type
, int desc
, CORE_ADDR valu
, char *name
,
1411 struct section_offsets
*section_offsets
,
1412 struct objfile
*objfile
)
1414 register struct context_stack
*new;
1415 /* The stab type used for the definition of the last function.
1416 N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */
1417 static int function_stab_type
= 0;
1420 /* Something is wrong if we see real data before
1421 seeing a source file name. */
1422 if (last_source_file
== NULL
&& type
!= (unsigned char) N_SO
)
1424 /* Ignore any symbols which appear before an N_SO symbol.
1425 Currently no one puts symbols there, but we should deal
1426 gracefully with the case. A complain()t might be in order,
1427 but this should not be an error (). */
1435 /* On most machines, the block addresses are relative to the
1436 N_SO, the linker did not relocate them (sigh). */
1437 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
1438 new = push_context (desc
, valu
);
1442 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
1443 new = pop_context ();
1445 #if !defined (OS9K_VARIABLES_INSIDE_BLOCK)
1446 #define OS9K_VARIABLES_INSIDE_BLOCK(desc, gcc_p) 1
1449 if (!OS9K_VARIABLES_INSIDE_BLOCK (desc
, processing_gcc_compilation
))
1450 local_symbols
= new->locals
;
1452 if (context_stack_depth
> 1)
1454 /* This is not the outermost LBRAC...RBRAC pair in the function,
1455 its local symbols preceded it, and are the ones just recovered
1456 from the context stack. Define the block for them (but don't
1457 bother if the block contains no symbols. Should we complain
1458 on blocks without symbols? I can't think of any useful purpose
1460 if (local_symbols
!= NULL
)
1462 /* Muzzle a compiler bug that makes end < start. (which
1463 compilers? Is this ever harmful?). */
1464 if (new->start_addr
> valu
)
1466 complain (&lbrac_rbrac_complaint
);
1467 new->start_addr
= valu
;
1469 /* Make a block for the local symbols within. */
1470 finish_block (0, &local_symbols
, new->old_blocks
,
1471 new->start_addr
, valu
, objfile
);
1476 if (context_stack_depth
== 0)
1478 within_function
= 0;
1479 /* Make a block for the local symbols within. */
1480 finish_block (new->name
, &local_symbols
, new->old_blocks
,
1481 new->start_addr
, valu
, objfile
);
1485 /* attach local_symbols to the end of new->locals */
1487 new->locals
= local_symbols
;
1495 p
->next
= local_symbols
;
1500 if (OS9K_VARIABLES_INSIDE_BLOCK (desc
, processing_gcc_compilation
))
1501 /* Now pop locals of block just finished. */
1502 local_symbols
= new->locals
;
1507 /* This type of "symbol" really just records
1508 one line-number -- core-address correspondence.
1509 Enter it in the line list for this symbol table. */
1510 /* Relocate for dynamic loading and for ELF acc fn-relative syms. */
1511 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
1512 /* FIXME: loses if sizeof (char *) > sizeof (int) */
1513 gdb_assert (sizeof (name
) <= sizeof (int));
1514 record_line (current_subfile
, (int) name
, valu
);
1517 /* The following symbol types need to have the appropriate offset added
1518 to their value; then we process symbol definitions in the name. */
1525 char *p
= strchr (name
, ':');
1535 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
1536 n
= strrchr (name
, '/');
1549 if (symfile_depth
++ == 0)
1551 if (last_source_file
)
1553 end_symtab (valu
, objfile
, SECT_OFF_TEXT (objfile
));
1558 start_symtab (n
, dirn
, valu
);
1559 record_debugformat ("OS9");
1564 start_subfile (n
, dirn
!= NULL
? dirn
: current_subfile
->dirname
);
1570 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
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 (objfile
));
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
, /* sym_offsets: parse user's offsets to internal form */
1616 NULL
/* next: pointer to next struct sym_fns */
1620 _initialize_os9kread (void)
1622 add_symtab_fns (&os9k_sym_fns
);