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,
20 Boston, MA 02111-1307, USA. */
22 /* This module provides three functions: os9k_symfile_init,
23 which initializes to read a symbol file; os9k_new_init, which
24 discards existing cached information when all symbols are being
25 discarded; and os9k_symfile_read, which reads a symbol table
28 os9k_symfile_read only does the minimum work necessary for letting the
29 user "name" things symbolically; it does not read the entire symtab.
30 Instead, it reads the external and static symbols and puts them in partial
31 symbol tables. When more extensive information is requested of a
32 file, the corresponding partial symbol table is mutated into a full
33 fledged symbol table by going back and reading the symbols
34 for real. os9k_psymtab_to_symtab() is the function that does this */
37 #include "gdb_string.h"
40 #if defined(USG) || defined(__CYGNUSCLIB__)
41 #include <sys/types.h>
49 #include "breakpoint.h"
52 #include "gdbcore.h" /* for bfd stuff */
53 #include "libaout.h" /* FIXME Secret internal BFD stuff for a.out */
57 #include "gdb-stabs.h"
59 #include "language.h" /* Needed inside partial-stab.h */
60 #include "complaints.h"
62 #include "stabsread.h"
64 extern void _initialize_os9kread
PARAMS ((void));
66 /* Each partial symbol table entry contains a pointer to private data for the
67 read_symtab() function to use when expanding a partial symbol table entry
68 to a full symbol table entry.
70 For dbxread this structure contains the offset within the file symbol table
71 of first local symbol for this file, and count of the section
72 of the symbol table devoted to this file's symbols (actually, the section
73 bracketed may contain more than just this file's symbols). It also contains
74 further information needed to locate the symbols if they are in an ELF file.
76 If ldsymcnt is 0, the only reason for this thing's existence is the
77 dependency list. Nothing else will happen when it is read in. */
79 #define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff)
80 #define LDSYMCNT(p) (((struct symloc *)((p)->read_symtab_private))->ldsymnum)
88 /* Remember what we deduced to be the source language of this psymtab. */
89 static enum language psymtab_language
= language_unknown
;
91 /* keep partial symbol table file nested depth */
92 static int psymfile_depth
= 0;
94 /* keep symbol table file nested depth */
95 static int symfile_depth
= 0;
97 /* Nonzero means give verbose info on gdb action. From main.c. */
98 extern int info_verbose
;
100 extern int previous_stab_code
;
102 /* Name of last function encountered. Used in Solaris to approximate
103 object file boundaries. */
104 static char *last_function_name
;
106 /* Complaints about the symbols we have encountered. */
107 extern struct complaint lbrac_complaint
;
109 extern struct complaint unknown_symtype_complaint
;
111 extern struct complaint unknown_symchar_complaint
;
113 extern struct complaint lbrac_rbrac_complaint
;
115 extern struct complaint repeated_header_complaint
;
117 extern struct complaint repeated_header_name_complaint
;
120 static struct complaint lbrac_unmatched_complaint
=
121 {"unmatched Increment Block Entry before symtab pos %d", 0, 0};
123 static struct complaint lbrac_mismatch_complaint
=
124 {"IBE/IDE symbol mismatch at symtab pos %d", 0, 0};
127 /* Local function prototypes */
130 read_minimal_symbols
PARAMS ((struct objfile
*));
133 os9k_read_ofile_symtab
PARAMS ((struct partial_symtab
*));
136 os9k_psymtab_to_symtab
PARAMS ((struct partial_symtab
*));
139 os9k_psymtab_to_symtab_1
PARAMS ((struct partial_symtab
*));
142 read_os9k_psymtab
PARAMS ((struct objfile
*, CORE_ADDR
, int));
145 fill_sym
PARAMS ((FILE *, bfd
*));
148 os9k_symfile_init
PARAMS ((struct objfile
*));
151 os9k_new_init
PARAMS ((struct objfile
*));
154 os9k_symfile_read
PARAMS ((struct objfile
*, int));
157 os9k_symfile_finish
PARAMS ((struct objfile
*));
160 os9k_process_one_symbol
PARAMS ((int, int, CORE_ADDR
, char *,
161 struct section_offsets
*, struct objfile
*));
163 static struct partial_symtab
*
164 os9k_start_psymtab
PARAMS ((struct objfile
*, char *,
165 CORE_ADDR
, int, int, struct partial_symbol
**,
166 struct partial_symbol
**));
168 static struct partial_symtab
*
169 os9k_end_psymtab
PARAMS ((struct partial_symtab
*, char **, int, int, CORE_ADDR
,
170 struct partial_symtab
**, int));
173 record_minimal_symbol
PARAMS ((char *, CORE_ADDR
, int, struct objfile
*));
175 #define HANDLE_RBRAC(val) \
176 if ((val) > pst->texthigh) pst->texthigh = (val);
178 #define SWAP_STBHDR(hdrp, abfd) \
180 (hdrp)->fmtno = bfd_get_16(abfd, (unsigned char *)&(hdrp)->fmtno); \
181 (hdrp)->crc = bfd_get_32(abfd, (unsigned char *)&(hdrp)->crc); \
182 (hdrp)->offset = bfd_get_32(abfd, (unsigned char *)&(hdrp)->offset); \
183 (hdrp)->nsym = bfd_get_32(abfd, (unsigned char *)&(hdrp)->nsym); \
185 #define SWAP_STBSYM(symp, abfd) \
187 (symp)->value = bfd_get_32(abfd, (unsigned char *)&(symp)->value); \
188 (symp)->type = bfd_get_16(abfd, (unsigned char *)&(symp)->type); \
189 (symp)->stroff = bfd_get_32(abfd, (unsigned char *)&(symp)->stroff); \
199 record_minimal_symbol (name
, address
, type
, objfile
)
203 struct objfile
*objfile
;
205 enum minimal_symbol_type ms_type
;
211 address
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
229 ms_type
= mst_unknown
;
233 prim_record_minimal_symbol (name
, address
, ms_type
, objfile
);
236 /* read and process .stb file and store in minimal symbol table */
237 typedef char mhhdr
[80];
254 #define STBSYMSIZE 10
257 read_minimal_symbols (objfile
)
258 struct objfile
*objfile
;
263 struct stbsymbol sym
;
265 char buf
[64], buf1
[128];
270 abfd
= objfile
->obfd
;
271 fread (&hdr
.comhdr
[0], sizeof (mhhdr
), 1, fp
);
286 fread (&hdr
.fmtno
, sizeof (hdr
.fmtno
), 1, fp
);
287 fread (&hdr
.crc
, sizeof (hdr
.crc
), 1, fp
);
288 fread (&hdr
.offset
, sizeof (hdr
.offset
), 1, fp
);
289 fread (&hdr
.nsym
, sizeof (hdr
.nsym
), 1, fp
);
290 SWAP_STBHDR (&hdr
, abfd
);
293 init_minimal_symbol_collection ();
295 for (i
= hdr
.nsym
; i
> 0; i
--)
297 fseek (fp
, (long) off
, 0);
298 fread (&sym
.value
, sizeof (sym
.value
), 1, fp
);
299 fread (&sym
.type
, sizeof (sym
.type
), 1, fp
);
300 fread (&sym
.stroff
, sizeof (sym
.stroff
), 1, fp
);
301 SWAP_STBSYM (&sym
, abfd
);
302 fseek (fp
, (long) sym
.stroff
, 0);
313 record_minimal_symbol (buf1
, sym
.value
, sym
.type
& 7, objfile
);
316 install_minimal_symbols (objfile
);
320 /* Scan and build partial symbols for a symbol file.
321 We have been initialized by a call to os9k_symfile_init, which
322 put all the relevant info into a "struct os9k_symfile_info",
323 hung off the objfile structure.
325 MAINLINE is true if we are reading the main symbol
326 table (as opposed to a shared lib or dynamically loaded file). */
329 os9k_symfile_read (objfile
, mainline
)
330 struct objfile
*objfile
;
331 int mainline
; /* FIXME comments above */
334 struct cleanup
*back_to
;
336 sym_bfd
= objfile
->obfd
;
337 /* If we are reinitializing, or if we have never loaded syms yet, init */
338 if (mainline
|| objfile
->global_psymbols
.size
== 0 ||
339 objfile
->static_psymbols
.size
== 0)
340 init_psymbol_list (objfile
, DBX_SYMCOUNT (objfile
));
342 free_pending_blocks ();
343 back_to
= make_cleanup (really_free_pendings
, 0);
345 make_cleanup ((make_cleanup_func
) discard_minimal_symbols
, 0);
346 read_minimal_symbols (objfile
);
348 /* Now that the symbol table data of the executable file are all in core,
349 process them and define symbols accordingly. */
350 read_os9k_psymtab (objfile
,
351 DBX_TEXT_ADDR (objfile
),
352 DBX_TEXT_SIZE (objfile
));
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
;
387 bfd
*sym_bfd
= objfile
->obfd
;
388 char *name
= bfd_get_filename (sym_bfd
);
389 char dbgname
[512], stbname
[512];
394 strcpy (dbgname
, name
);
395 strcat (dbgname
, ".dbg");
396 strcpy (stbname
, name
);
397 strcat (stbname
, ".stb");
399 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
)
407 warning ("Symbol file %s not found", stbname
);
409 objfile
->auxf1
= minfile
;
411 /* Allocate struct to keep track of the symfile */
412 objfile
->sym_stab_info
= (struct dbx_symfile_info
*)
413 xmmalloc (objfile
->md
, sizeof (struct dbx_symfile_info
));
414 DBX_SYMFILE_INFO (objfile
)->stab_section_info
= NULL
;
416 text_sect
= bfd_get_section_by_name (sym_bfd
, ".text");
418 error ("Can't find .text section in file");
419 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
420 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
422 DBX_SYMBOL_SIZE (objfile
) = 0; /* variable size symbol */
423 DBX_SYMCOUNT (objfile
) = 0; /* used to be bfd_get_symcount(sym_bfd) */
424 DBX_SYMTAB_OFFSET (objfile
) = 0; /* used to be SYMBOL_TABLE_OFFSET */
427 /* Perform any local cleanups required when we are done with a particular
428 objfile. I.E, we are in the process of discarding all symbol information
429 for an objfile, freeing up all memory held for it, and unlinking the
430 objfile struct from the global list of known objfiles. */
433 os9k_symfile_finish (objfile
)
434 struct objfile
*objfile
;
436 if (objfile
->sym_stab_info
!= NULL
)
438 mfree (objfile
->md
, objfile
->sym_stab_info
);
441 free_header_files ();
454 #define SYNC (int)0xefbefeca
456 #define SWAP_DBGHDR(hdrp, abfd) \
458 (hdrp)->sync = bfd_get_32(abfd, (unsigned char *)&(hdrp)->sync); \
459 (hdrp)->rev = bfd_get_16(abfd, (unsigned char *)&(hdrp)->rev); \
460 (hdrp)->crc = bfd_get_32(abfd, (unsigned char *)&(hdrp)->crc); \
461 (hdrp)->os = bfd_get_16(abfd, (unsigned char *)&(hdrp)->os); \
462 (hdrp)->cpu = bfd_get_16(abfd, (unsigned char *)&(hdrp)->cpu); \
465 #define N_SYM_CMPLR 0
466 #define N_SYM_SLINE 1
468 #define N_SYM_LBRAC 3
469 #define N_SYM_RBRAC 4
472 struct internal_symstruct
479 static struct internal_symstruct symbol
;
480 static struct internal_symstruct
*symbuf
= &symbol
;
481 static char strbuf
[4096];
482 static struct st_dbghdr dbghdr
;
483 static short cmplrid
;
485 #define VER_PRE_ULTRAC ((short)4)
486 #define VER_ULTRAC ((short)5)
489 fill_sym (dbg_file
, abfd
)
498 int nbytes
= fread (&si
, sizeof (si
), 1, dbg_file
);
502 perror_with_name ("reading .dbg file.");
505 symbuf
->n_strx
= NULL
;
506 symbuf
->n_type
= bfd_get_16 (abfd
, (unsigned char *) &si
);
507 symbuf
->n_type
= 0xf & symbuf
->n_type
;
508 switch (symbuf
->n_type
)
511 fread (&si
, sizeof (si
), 1, dbg_file
);
512 symbuf
->n_desc
= bfd_get_16 (abfd
, (unsigned char *) &si
);
513 cmplrid
= symbuf
->n_desc
& 0xff;
516 fread (&li
, sizeof (li
), 1, dbg_file
);
517 symbuf
->n_value
= bfd_get_32 (abfd
, (unsigned char *) &li
);
518 fread (&li
, sizeof (li
), 1, dbg_file
);
519 li
= bfd_get_32 (abfd
, (unsigned char *) &li
);
520 symbuf
->n_strx
= (char *) (li
>> 12);
521 symbuf
->n_desc
= li
& 0xfff;
524 fread (&li
, sizeof (li
), 1, dbg_file
);
525 symbuf
->n_value
= bfd_get_32 (abfd
, (unsigned char *) &li
);
529 ii
= getc (dbg_file
);
530 strbuf
[si
++] = (char) ii
;
532 while (ii
!= 0 || si
% 2 != 0);
533 symbuf
->n_strx
= strbuf
;
534 p
= (char *) strchr (strbuf
, ':');
537 if ((p
[1] == 'F' || p
[1] == 'f') && cmplrid
== VER_PRE_ULTRAC
)
539 fread (&si
, sizeof (si
), 1, dbg_file
);
540 nmask
= bfd_get_16 (abfd
, (unsigned char *) &si
);
541 for (ii
= 0; ii
< nmask
; ii
++)
542 fread (&si
, sizeof (si
), 1, dbg_file
);
546 fread (&li
, sizeof (li
), 1, dbg_file
);
547 symbuf
->n_value
= bfd_get_32 (abfd
, (unsigned char *) &li
);
550 fread (&li
, sizeof (li
), 1, dbg_file
);
551 symbuf
->n_value
= bfd_get_32 (abfd
, (unsigned char *) &li
);
559 /* Given pointers to an a.out symbol table in core containing dbx
560 style data, setup partial_symtab's describing each source file for
561 which debugging information is available.
562 SYMFILE_NAME is the name of the file we are reading from. */
565 read_os9k_psymtab (objfile
, text_addr
, text_size
)
566 struct objfile
*objfile
;
570 register struct internal_symstruct
*bufp
= 0; /* =0 avoids gcc -Wall glitch */
571 register char *namestring
;
572 int past_first_source_file
= 0;
573 CORE_ADDR last_o_file_start
= 0;
575 struct cleanup
*back_to
;
580 /* End of the text segment of the executable file. */
581 static CORE_ADDR end_of_text_addr
;
583 /* Current partial symtab */
584 static struct partial_symtab
*pst
= 0;
586 /* List of current psymtab's include files */
587 char **psymtab_include_list
;
588 int includes_allocated
;
591 /* Index within current psymtab dependency list */
592 struct partial_symtab
**dependency_list
;
593 int dependencies_used
, dependencies_allocated
;
595 includes_allocated
= 30;
597 psymtab_include_list
= (char **) alloca (includes_allocated
*
600 dependencies_allocated
= 30;
601 dependencies_used
= 0;
603 (struct partial_symtab
**) alloca (dependencies_allocated
*
604 sizeof (struct partial_symtab
*));
606 last_source_file
= NULL
;
608 #ifdef END_OF_TEXT_DEFAULT
609 end_of_text_addr
= END_OF_TEXT_DEFAULT
;
611 end_of_text_addr
= text_addr
+ ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
))
612 + text_size
; /* Relocate */
615 abfd
= objfile
->obfd
;
620 fread (&dbghdr
.sync
, sizeof (dbghdr
.sync
), 1, fp
);
621 fread (&dbghdr
.rev
, sizeof (dbghdr
.rev
), 1, fp
);
622 fread (&dbghdr
.crc
, sizeof (dbghdr
.crc
), 1, fp
);
623 fread (&dbghdr
.os
, sizeof (dbghdr
.os
), 1, fp
);
624 fread (&dbghdr
.cpu
, sizeof (dbghdr
.cpu
), 1, fp
);
625 SWAP_DBGHDR (&dbghdr
, abfd
);
633 /* Get the symbol for this run and pull out some info */
634 QUIT
; /* allow this to be interruptable */
635 cursymoffset
= ftell (objfile
->auxf2
);
636 ret
= fill_sym (objfile
->auxf2
, abfd
);
643 /* Special case to speed up readin. */
644 if (bufp
->n_type
== (short) N_SYM_SLINE
)
647 #define CUR_SYMBOL_VALUE bufp->n_value
650 switch (bufp
->n_type
)
658 CUR_SYMBOL_VALUE
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
659 if (psymfile_depth
== 1 && pst
)
661 os9k_end_psymtab (pst
, psymtab_include_list
, includes_used
,
662 symnum
, CUR_SYMBOL_VALUE
,
663 dependency_list
, dependencies_used
);
664 pst
= (struct partial_symtab
*) 0;
666 dependencies_used
= 0;
671 case N_SYM_SYM
: /* Typedef or automatic variable. */
672 namestring
= bufp
->n_strx
;
673 p
= (char *) strchr (namestring
, ':');
675 continue; /* Not a debugging symbol. */
677 /* Main processing section for debugging symbols which
678 the initial read through the symbol tables needs to worry
679 about. If we reach this point, the symbol which we are
680 considering is definitely one we are interested in.
681 p must also contain the (valid) index into the namestring
682 which indicates the debugging type symbol. */
689 enum language tmp_language
;
693 valu
= CUR_SYMBOL_VALUE
;
695 valu
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
696 past_first_source_file
= 1;
698 p
= strchr (namestring
, ':');
702 n
= strlen (namestring
);
703 str
= alloca (n
+ 1);
704 strncpy (str
, namestring
, n
);
707 if (psymfile_depth
== 0)
710 pst
= os9k_start_psymtab (objfile
,
714 objfile
->global_psymbols
.next
,
715 objfile
->static_psymbols
.next
);
718 { /* this is a include file */
719 tmp_language
= deduce_language_from_filename (str
);
720 if (tmp_language
!= language_unknown
721 && (tmp_language
!= language_c
722 || psymtab_language
!= language_cplus
))
723 psymtab_language
= tmp_language
;
726 if (pst && STREQ (str, pst->filename))
730 for (i = 0; i < includes_used; i++)
731 if (STREQ (str, psymtab_include_list[i]))
741 psymtab_include_list
[includes_used
++] = str
;
742 if (includes_used
>= includes_allocated
)
744 char **orig
= psymtab_include_list
;
746 psymtab_include_list
= (char **)
747 alloca ((includes_allocated
*= 2) * sizeof (char *));
748 memcpy ((PTR
) psymtab_include_list
, (PTR
) orig
,
749 includes_used
* sizeof (char *));
758 add_psymbol_to_list (namestring
, p
- namestring
,
759 VAR_NAMESPACE
, LOC_STATIC
,
760 &objfile
->static_psymbols
,
762 psymtab_language
, objfile
);
765 add_psymbol_to_list (namestring
, p
- namestring
,
766 VAR_NAMESPACE
, LOC_STATIC
,
767 &objfile
->global_psymbols
,
769 psymtab_language
, objfile
);
773 if (p
!= namestring
) /* a name is there, not just :T... */
775 add_psymbol_to_list (namestring
, p
- namestring
,
776 STRUCT_NAMESPACE
, LOC_TYPEDEF
,
777 &objfile
->static_psymbols
,
779 psymtab_language
, objfile
);
782 /* Also a typedef with the same name. */
783 add_psymbol_to_list (namestring
, p
- namestring
,
784 VAR_NAMESPACE
, LOC_TYPEDEF
,
785 &objfile
->static_psymbols
,
786 CUR_SYMBOL_VALUE
, 0, psymtab_language
,
790 /* The semantics of C++ state that "struct foo { ... }"
791 also defines a typedef for "foo". Unfortuantely, cfront
792 never makes the typedef when translating from C++ to C.
793 We make the typedef here so that "ptype foo" works as
794 expected for cfront translated code. */
795 else if (psymtab_language
== language_cplus
)
797 /* Also a typedef with the same name. */
798 add_psymbol_to_list (namestring
, p
- namestring
,
799 VAR_NAMESPACE
, LOC_TYPEDEF
,
800 &objfile
->static_psymbols
,
801 CUR_SYMBOL_VALUE
, 0, psymtab_language
,
807 if (p
!= namestring
) /* a name is there, not just :T... */
809 add_psymbol_to_list (namestring
, p
- namestring
,
810 VAR_NAMESPACE
, LOC_TYPEDEF
,
811 &objfile
->static_psymbols
,
813 psymtab_language
, objfile
);
816 /* If this is an enumerated type, we need to
817 add all the enum constants to the partial symbol
818 table. This does not cover enums without names, e.g.
819 "enum {a, b} c;" in C, but fortunately those are
820 rare. There is no way for GDB to find those from the
821 enum type without spending too much time on it. Thus
822 to solve this problem, the compiler needs to put out the
823 enum in a nameless type. GCC2 does this. */
825 /* We are looking for something of the form
826 <name> ":" ("t" | "T") [<number> "="] "e" <size>
827 {<constant> ":" <value> ","} ";". */
829 /* Skip over the colon and the 't' or 'T'. */
831 /* This type may be given a number. Also, numbers can come
832 in pairs like (0,26). Skip over it. */
833 while ((*p
>= '0' && *p
<= '9')
834 || *p
== '(' || *p
== ',' || *p
== ')'
840 /* We have found an enumerated type. skip size */
841 while (*p
>= '0' && *p
<= '9')
843 /* According to comments in read_enum_type
844 a comma could end it instead of a semicolon.
845 I don't know where that happens.
847 while (*p
&& *p
!= ';' && *p
!= ',')
851 /* Check for and handle cretinous dbx symbol name
854 p = next_symbol_text (objfile);
857 /* Point to the character after the name
858 of the enum constant. */
859 for (q
= p
; *q
&& *q
!= ':'; q
++)
861 /* Note that the value doesn't matter for
862 enum constants in psymtabs, just in symtabs. */
863 add_psymbol_to_list (p
, q
- p
,
864 VAR_NAMESPACE
, LOC_CONST
,
865 &objfile
->static_psymbols
, 0,
866 0, psymtab_language
, objfile
);
867 /* Point past the name. */
869 /* Skip over the value. */
870 while (*p
&& *p
!= ',')
872 /* Advance past the comma. */
879 /* Constant, e.g. from "const" in Pascal. */
880 add_psymbol_to_list (namestring
, p
- namestring
,
881 VAR_NAMESPACE
, LOC_CONST
,
882 &objfile
->static_psymbols
, CUR_SYMBOL_VALUE
,
883 0, psymtab_language
, objfile
);
887 CUR_SYMBOL_VALUE
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
888 if (pst
&& pst
->textlow
== 0)
889 pst
->textlow
= CUR_SYMBOL_VALUE
;
891 add_psymbol_to_list (namestring
, p
- namestring
,
892 VAR_NAMESPACE
, LOC_BLOCK
,
893 &objfile
->static_psymbols
, CUR_SYMBOL_VALUE
,
894 0, psymtab_language
, objfile
);
898 CUR_SYMBOL_VALUE
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
899 if (pst
&& pst
->textlow
== 0)
900 pst
->textlow
= CUR_SYMBOL_VALUE
;
902 add_psymbol_to_list (namestring
, p
- namestring
,
903 VAR_NAMESPACE
, LOC_BLOCK
,
904 &objfile
->global_psymbols
, CUR_SYMBOL_VALUE
,
905 0, psymtab_language
, objfile
);
914 /* It is a C++ nested symbol. We don't need to record it
915 (I don't think); if we try to look up foo::bar::baz,
916 then symbols for the symtab containing foo should get
918 /* Someone says sun cc puts out symbols like
919 /foo/baz/maclib::/usr/local/bin/maclib,
920 which would get here with a symbol type of ':'. */
924 /* Unexpected symbol descriptor. The second and subsequent stabs
925 of a continued stab can show up here. The question is
926 whether they ever can mimic a normal stab--it would be
927 nice if not, since we certainly don't want to spend the
928 time searching to the end of every string looking for
931 complain (&unknown_symchar_complaint
, p
[1]);
936 CUR_SYMBOL_VALUE
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
938 HANDLE_RBRAC (CUR_SYMBOL_VALUE
);
945 /* If we haven't found it yet, ignore it. It's probably some
946 new type we don't know about yet. */
947 complain (&unknown_symtype_complaint
,
948 local_hex_string ((unsigned long) bufp
->n_type
));
953 DBX_SYMCOUNT (objfile
) = symnum
;
955 /* If there's stuff to be cleaned up, clean it up. */
956 if (DBX_SYMCOUNT (objfile
) > 0
957 /*FIXME, does this have a bug at start address 0? */
959 && objfile
->ei
.entry_point
< bufp
->n_value
960 && objfile
->ei
.entry_point
>= last_o_file_start
)
962 objfile
->ei
.entry_file_lowpc
= last_o_file_start
;
963 objfile
->ei
.entry_file_highpc
= bufp
->n_value
;
968 os9k_end_psymtab (pst
, psymtab_include_list
, includes_used
,
969 symnum
, end_of_text_addr
,
970 dependency_list
, dependencies_used
);
973 do_cleanups (back_to);
977 /* Allocate and partially fill a partial symtab. It will be
978 completely filled at the end of the symbol list.
980 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
981 is the address relative to which its symbols are (incremental) or 0
985 static struct partial_symtab
*
986 os9k_start_psymtab (objfile
,
987 filename
, textlow
, ldsymoff
, ldsymcnt
, global_syms
, static_syms
)
988 struct objfile
*objfile
;
993 struct partial_symbol
**global_syms
;
994 struct partial_symbol
**static_syms
;
996 struct partial_symtab
*result
=
997 start_psymtab_common (objfile
, objfile
->section_offsets
,
998 filename
, textlow
, global_syms
, static_syms
);
1000 result
->read_symtab_private
= (char *)
1001 obstack_alloc (&objfile
->psymbol_obstack
, sizeof (struct symloc
));
1003 LDSYMOFF (result
) = ldsymoff
;
1004 LDSYMCNT (result
) = ldsymcnt
;
1005 result
->read_symtab
= os9k_psymtab_to_symtab
;
1007 /* Deduce the source language from the filename for this psymtab. */
1008 psymtab_language
= deduce_language_from_filename (filename
);
1012 /* Close off the current usage of PST.
1013 Returns PST or NULL if the partial symtab was empty and thrown away.
1014 FIXME: List variables and peculiarities of same. */
1016 static struct partial_symtab
*
1017 os9k_end_psymtab (pst
, include_list
, num_includes
, capping_symbol_cnt
,
1018 capping_text
, dependency_list
, number_dependencies
)
1019 struct partial_symtab
*pst
;
1020 char **include_list
;
1022 int capping_symbol_cnt
;
1023 CORE_ADDR capping_text
;
1024 struct partial_symtab
**dependency_list
;
1025 int number_dependencies
;
1026 /* struct partial_symbol *capping_global, *capping_static; */
1029 struct partial_symtab
*p1
;
1030 struct objfile
*objfile
= pst
->objfile
;
1032 if (capping_symbol_cnt
!= -1)
1033 LDSYMCNT (pst
) = capping_symbol_cnt
- LDSYMCNT (pst
);
1035 /* Under Solaris, the N_SO symbols always have a value of 0,
1036 instead of the usual address of the .o file. Therefore,
1037 we have to do some tricks to fill in texthigh and textlow.
1038 The first trick is in partial-stab.h: if we see a static
1039 or global function, and the textlow for the current pst
1040 is still 0, then we use that function's address for
1041 the textlow of the pst.
1043 Now, to fill in texthigh, we remember the last function seen
1044 in the .o file (also in partial-stab.h). Also, there's a hack in
1045 bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
1046 to here via the misc_info field. Therefore, we can fill in
1047 a reliable texthigh by taking the address plus size of the
1048 last function in the file.
1050 Unfortunately, that does not cover the case where the last function
1051 in the file is static. See the paragraph below for more comments
1054 Finally, if we have a valid textlow for the current file, we run
1055 down the partial_symtab_list filling in previous texthighs that
1056 are still unknown. */
1058 if (pst
->texthigh
== 0 && last_function_name
)
1062 struct minimal_symbol
*minsym
;
1064 p
= strchr (last_function_name
, ':');
1066 p
= last_function_name
;
1067 n
= p
- last_function_name
;
1069 strncpy (p
, last_function_name
, n
);
1072 minsym
= lookup_minimal_symbol (p
, NULL
, objfile
);
1076 pst
->texthigh
= SYMBOL_VALUE_ADDRESS (minsym
) + (long) MSYMBOL_INFO (minsym
);
1080 /* This file ends with a static function, and it's
1081 difficult to imagine how hard it would be to track down
1082 the elf symbol. Luckily, most of the time no one will notice,
1083 since the next file will likely be compiled with -g, so
1084 the code below will copy the first fuction's start address
1085 back to our texthigh variable. (Also, if this file is the
1086 last one in a dynamically linked program, texthigh already
1087 has the right value.) If the next file isn't compiled
1088 with -g, then the last function in this file winds up owning
1089 all of the text space up to the next -g file, or the end (minus
1090 shared libraries). This only matters for single stepping,
1091 and even then it will still work, except that it will single
1092 step through all of the covered functions, instead of setting
1093 breakpoints around them as it usualy does. This makes it
1094 pretty slow, but at least it doesn't fail.
1096 We can fix this with a fairly big change to bfd, but we need
1097 to coordinate better with Cygnus if we want to do that. FIXME. */
1099 last_function_name
= NULL
;
1102 /* this test will be true if the last .o file is only data */
1103 if (pst
->textlow
== 0)
1104 pst
->textlow
= pst
->texthigh
;
1106 /* If we know our own starting text address, then walk through all other
1107 psymtabs for this objfile, and if any didn't know their ending text
1108 address, set it to our starting address. Take care to not set our
1109 own ending address to our starting address, nor to set addresses on
1110 `dependency' files that have both textlow and texthigh zero. */
1113 ALL_OBJFILE_PSYMTABS (objfile
, p1
)
1115 if (p1
->texthigh
== 0 && p1
->textlow
!= 0 && p1
!= pst
)
1117 p1
->texthigh
= pst
->textlow
;
1118 /* if this file has only data, then make textlow match texthigh */
1119 if (p1
->textlow
== 0)
1120 p1
->textlow
= p1
->texthigh
;
1125 /* End of kludge for patching Solaris textlow and texthigh. */
1127 pst
->n_global_syms
=
1128 objfile
->global_psymbols
.next
- (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
1129 pst
->n_static_syms
=
1130 objfile
->static_psymbols
.next
- (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
1132 pst
->number_of_dependencies
= number_dependencies
;
1133 if (number_dependencies
)
1135 pst
->dependencies
= (struct partial_symtab
**)
1136 obstack_alloc (&objfile
->psymbol_obstack
,
1137 number_dependencies
* sizeof (struct partial_symtab
*));
1138 memcpy (pst
->dependencies
, dependency_list
,
1139 number_dependencies
* sizeof (struct partial_symtab
*));
1142 pst
->dependencies
= 0;
1144 for (i
= 0; i
< num_includes
; i
++)
1146 struct partial_symtab
*subpst
=
1147 allocate_psymtab (include_list
[i
], objfile
);
1149 subpst
->section_offsets
= pst
->section_offsets
;
1150 subpst
->read_symtab_private
=
1151 (char *) obstack_alloc (&objfile
->psymbol_obstack
,
1152 sizeof (struct symloc
));
1156 subpst
->texthigh
= 0;
1158 /* We could save slight bits of space by only making one of these,
1159 shared by the entire set of include files. FIXME-someday. */
1160 subpst
->dependencies
= (struct partial_symtab
**)
1161 obstack_alloc (&objfile
->psymbol_obstack
,
1162 sizeof (struct partial_symtab
*));
1163 subpst
->dependencies
[0] = pst
;
1164 subpst
->number_of_dependencies
= 1;
1166 subpst
->globals_offset
=
1167 subpst
->n_global_syms
=
1168 subpst
->statics_offset
=
1169 subpst
->n_static_syms
= 0;
1173 subpst
->read_symtab
= pst
->read_symtab
;
1176 sort_pst_symbols (pst
);
1178 /* If there is already a psymtab or symtab for a file of this name,
1180 (If there is a symtab, more drastic things also happen.)
1181 This happens in VxWorks. */
1182 free_named_symtabs (pst
->filename
);
1184 if (num_includes
== 0
1185 && number_dependencies
== 0
1186 && pst
->n_global_syms
== 0
1187 && pst
->n_static_syms
== 0)
1189 /* Throw away this psymtab, it's empty. We can't deallocate it, since
1190 it is on the obstack, but we can forget to chain it on the list. */
1191 /* Indicate that psymtab was thrown away. */
1193 discard_psymtab (pst
);
1195 pst
= (struct partial_symtab
*) NULL
;
1201 os9k_psymtab_to_symtab_1 (pst
)
1202 struct partial_symtab
*pst
;
1204 struct cleanup
*old_chain
;
1212 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1217 /* Read in all partial symtabs on which this one is dependent */
1218 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
1219 if (!pst
->dependencies
[i
]->readin
)
1221 /* Inform about additional files that need to be read in. */
1224 fputs_filtered (" ", gdb_stdout
);
1226 fputs_filtered ("and ", gdb_stdout
);
1228 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
1229 wrap_here (""); /* Flush output */
1230 gdb_flush (gdb_stdout
);
1232 os9k_psymtab_to_symtab_1 (pst
->dependencies
[i
]);
1235 if (LDSYMCNT (pst
)) /* Otherwise it's a dummy */
1237 /* Init stuff necessary for reading in symbols */
1240 old_chain
= make_cleanup (really_free_pendings
, 0);
1242 /* Read in this file's symbols */
1243 os9k_read_ofile_symtab (pst
);
1244 sort_symtab_syms (pst
->symtab
);
1245 do_cleanups (old_chain
);
1251 /* Read in all of the symbols for a given psymtab for real.
1252 Be verbose about it if the user wants that. */
1255 os9k_psymtab_to_symtab (pst
)
1256 struct partial_symtab
*pst
;
1265 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1270 if (LDSYMCNT (pst
) || pst
->number_of_dependencies
)
1272 /* Print the message now, before reading the string table,
1273 to avoid disconcerting pauses. */
1276 printf_filtered ("Reading in symbols for %s...", pst
->filename
);
1277 gdb_flush (gdb_stdout
);
1280 sym_bfd
= pst
->objfile
->obfd
;
1281 os9k_psymtab_to_symtab_1 (pst
);
1283 /* Match with global symbols. This only needs to be done once,
1284 after all of the symtabs and dependencies have been read in. */
1285 scan_file_globals (pst
->objfile
);
1287 /* Finish up the debug error message. */
1289 printf_filtered ("done.\n");
1293 /* Read in a defined section of a specific object file's symbols. */
1295 os9k_read_ofile_symtab (pst
)
1296 struct partial_symtab
*pst
;
1298 register struct internal_symstruct
*bufp
;
1300 unsigned max_symnum
;
1302 struct objfile
*objfile
;
1303 int sym_offset
; /* Offset to start of symbols to read */
1304 CORE_ADDR text_offset
; /* Start of text segment for symbols */
1305 int text_size
; /* Size of text segment for symbols */
1308 objfile
= pst
->objfile
;
1309 sym_offset
= LDSYMOFF (pst
);
1310 max_symnum
= LDSYMCNT (pst
);
1311 text_offset
= pst
->textlow
;
1312 text_size
= pst
->texthigh
- pst
->textlow
;
1314 current_objfile
= objfile
;
1315 subfile_stack
= NULL
;
1316 last_source_file
= NULL
;
1318 abfd
= objfile
->obfd
;
1319 dbg_file
= objfile
->auxf2
;
1322 /* It is necessary to actually read one symbol *before* the start
1323 of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
1324 occurs before the N_SO symbol.
1325 Detecting this in read_dbx_symtab
1326 would slow down initial readin, so we look for it here instead. */
1327 if (!processing_acc_compilation
&& sym_offset
>= (int) symbol_size
)
1329 fseek (objefile
->auxf2
, sym_offset
, SEEK_CUR
);
1330 fill_sym (objfile
->auxf2
, abfd
);
1333 processing_gcc_compilation
= 0;
1334 if (bufp
->n_type
== N_TEXT
)
1336 if (STREQ (namestring
, GCC_COMPILED_FLAG_SYMBOL
))
1337 processing_gcc_compilation
= 1;
1338 else if (STREQ (namestring
, GCC2_COMPILED_FLAG_SYMBOL
))
1339 processing_gcc_compilation
= 2;
1342 /* Try to select a C++ demangling based on the compilation unit
1345 if (processing_gcc_compilation
)
1347 if (AUTO_DEMANGLING
)
1349 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
1355 /* The N_SO starting this symtab is the first symbol, so we
1356 better not check the symbol before it. I'm not this can
1357 happen, but it doesn't hurt to check for it. */
1358 bfd_seek (symfile_bfd
, sym_offset
, SEEK_CUR
);
1359 processing_gcc_compilation
= 0;
1363 fseek (dbg_file
, (long) sym_offset
, 0);
1365 if (bufp->n_type != (unsigned char)N_SYM_SYM)
1366 error("First symbol in segment of executable not a source symbol");
1369 for (symnum
= 0; symnum
< max_symnum
; symnum
++)
1371 QUIT
; /* Allow this to be interruptable */
1372 fill_sym (dbg_file
, abfd
);
1374 type
= bufp
->n_type
;
1376 os9k_process_one_symbol ((int) type
, (int) bufp
->n_desc
,
1377 (CORE_ADDR
) bufp
->n_value
, bufp
->n_strx
, pst
->section_offsets
, objfile
);
1379 /* We skip checking for a new .o or -l file; that should never
1380 happen in this routine. */
1385 /* I don't think this code will ever be executed, because
1386 the GCC_COMPILED_FLAG_SYMBOL usually is right before
1387 the N_SO symbol which starts this source file.
1388 However, there is no reason not to accept
1389 the GCC_COMPILED_FLAG_SYMBOL anywhere. */
1391 if (STREQ (namestring
, GCC_COMPILED_FLAG_SYMBOL
))
1392 processing_gcc_compilation
= 1;
1393 else if (STREQ (namestring
, GCC2_COMPILED_FLAG_SYMBOL
))
1394 processing_gcc_compilation
= 2;
1396 if (AUTO_DEMANGLING
)
1398 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
1401 else if (type
& N_EXT
|| type
== (unsigned char) N_TEXT
1402 || type
== (unsigned char) N_NBTEXT
1405 /* Global symbol: see if we came across a dbx defintion for
1406 a corresponding symbol. If so, store the value. Remove
1407 syms from the chain when their values are stored, but
1408 search the whole chain, as there may be several syms from
1409 different files with the same name. */
1410 /* This is probably not true. Since the files will be read
1411 in one at a time, each reference to a global symbol will
1412 be satisfied in each file as it appears. So we skip this
1419 current_objfile
= NULL
;
1421 /* In a Solaris elf file, this variable, which comes from the
1422 value of the N_SO symbol, will still be 0. Luckily, text_offset,
1423 which comes from pst->textlow is correct. */
1424 if (last_source_start_addr
== 0)
1425 last_source_start_addr
= text_offset
;
1426 pst
->symtab
= end_symtab (text_offset
+ text_size
, objfile
, SECT_OFF_TEXT (objfile
));
1431 /* This handles a single symbol from the symbol-file, building symbols
1432 into a GDB symtab. It takes these arguments and an implicit argument.
1434 TYPE is the type field of the ".stab" symbol entry.
1435 DESC is the desc field of the ".stab" entry.
1436 VALU is the value field of the ".stab" entry.
1437 NAME is the symbol name, in our address space.
1438 SECTION_OFFSETS is a set of amounts by which the sections of this object
1439 file were relocated when it was loaded into memory.
1440 All symbols that refer
1441 to memory locations need to be offset by these amounts.
1442 OBJFILE is the object file from which we are reading symbols.
1443 It is used in end_symtab. */
1446 os9k_process_one_symbol (type
, desc
, valu
, name
, section_offsets
, objfile
)
1450 struct section_offsets
*section_offsets
;
1451 struct objfile
*objfile
;
1453 register struct context_stack
*new;
1454 /* The stab type used for the definition of the last function.
1455 N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */
1456 static int function_stab_type
= 0;
1459 /* Something is wrong if we see real data before
1460 seeing a source file name. */
1461 if (last_source_file
== NULL
&& type
!= (unsigned char) N_SO
)
1463 /* Ignore any symbols which appear before an N_SO symbol.
1464 Currently no one puts symbols there, but we should deal
1465 gracefully with the case. A complain()t might be in order,
1466 but this should not be an error (). */
1474 /* On most machines, the block addresses are relative to the
1475 N_SO, the linker did not relocate them (sigh). */
1476 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
1477 new = push_context (desc
, valu
);
1481 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
1482 new = pop_context ();
1484 #if !defined (OS9K_VARIABLES_INSIDE_BLOCK)
1485 #define OS9K_VARIABLES_INSIDE_BLOCK(desc, gcc_p) 1
1488 if (!OS9K_VARIABLES_INSIDE_BLOCK (desc
, processing_gcc_compilation
))
1489 local_symbols
= new->locals
;
1491 if (context_stack_depth
> 1)
1493 /* This is not the outermost LBRAC...RBRAC pair in the function,
1494 its local symbols preceded it, and are the ones just recovered
1495 from the context stack. Define the block for them (but don't
1496 bother if the block contains no symbols. Should we complain
1497 on blocks without symbols? I can't think of any useful purpose
1499 if (local_symbols
!= NULL
)
1501 /* Muzzle a compiler bug that makes end < start. (which
1502 compilers? Is this ever harmful?). */
1503 if (new->start_addr
> valu
)
1505 complain (&lbrac_rbrac_complaint
);
1506 new->start_addr
= valu
;
1508 /* Make a block for the local symbols within. */
1509 finish_block (0, &local_symbols
, new->old_blocks
,
1510 new->start_addr
, valu
, objfile
);
1515 if (context_stack_depth
== 0)
1517 within_function
= 0;
1518 /* Make a block for the local symbols within. */
1519 finish_block (new->name
, &local_symbols
, new->old_blocks
,
1520 new->start_addr
, valu
, objfile
);
1524 /* attach local_symbols to the end of new->locals */
1526 new->locals
= local_symbols
;
1534 p
->next
= local_symbols
;
1539 if (OS9K_VARIABLES_INSIDE_BLOCK (desc
, processing_gcc_compilation
))
1540 /* Now pop locals of block just finished. */
1541 local_symbols
= new->locals
;
1546 /* This type of "symbol" really just records
1547 one line-number -- core-address correspondence.
1548 Enter it in the line list for this symbol table. */
1549 /* Relocate for dynamic loading and for ELF acc fn-relative syms. */
1550 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
1551 /* FIXME: loses if sizeof (char *) > sizeof (int) */
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 (objfile
));
1574 n
= strrchr (name
, '/');
1587 if (symfile_depth
++ == 0)
1589 if (last_source_file
)
1591 end_symtab (valu
, objfile
, SECT_OFF_TEXT (objfile
));
1596 start_symtab (n
, dirn
, valu
);
1597 record_debugformat ("OS9");
1602 start_subfile (n
, dirn
!= NULL
? dirn
: current_subfile
->dirname
);
1608 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
1609 function_stab_type
= type
;
1611 within_function
= 1;
1612 new = push_context (0, valu
);
1613 new->name
= define_symbol (valu
, name
, desc
, type
, objfile
);
1618 valu
+= ANOFFSET (section_offsets
, SECT_OFF_DATA (objfile
));
1619 define_symbol (valu
, name
, desc
, type
, objfile
);
1623 define_symbol (valu
, name
, desc
, type
, objfile
);
1630 if (--symfile_depth
!= 0)
1631 start_subfile (pop_subfile (), current_subfile
->dirname
);
1635 complain (&unknown_symtype_complaint
,
1636 local_hex_string ((unsigned long) type
));
1643 previous_stab_code
= type
;
1646 static struct sym_fns os9k_sym_fns
=
1648 bfd_target_os9k_flavour
,
1649 os9k_new_init
, /* sym_new_init: init anything gbl to entire symtab */
1650 os9k_symfile_init
, /* sym_init: read initial info, setup for sym_read() */
1651 os9k_symfile_read
, /* sym_read: read a symbol file into symtab */
1652 os9k_symfile_finish
, /* sym_finish: finished with file, cleanup */
1653 default_symfile_offsets
, /* sym_offsets: parse user's offsets to internal form */
1654 NULL
/* next: pointer to next struct sym_fns */
1658 _initialize_os9kread ()
1660 add_symtab_fns (&os9k_sym_fns
);