1 /* Read AIX xcoff symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986-2023 Free Software Foundation, Inc.
3 Derived from coffread.c, dbxread.c, and a lot of hacking.
4 Contributed by IBM Corporation.
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 3 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, see <http://www.gnu.org/licenses/>. */
24 #include <sys/types.h>
27 #ifdef HAVE_SYS_FILE_H
33 #include "coff/internal.h"
34 #include "libcoff.h" /* FIXME, internal data from BFD */
35 #include "coff/xcoff.h"
37 #include "coff/rs6000.h"
38 #include "xcoffread.h"
42 /* FIXME: ezannoni/2004-02-13 Verify if the include below is really needed. */
45 #include "buildsym-legacy.h"
46 #include "stabsread.h"
47 #include "expression.h"
48 #include "complaints.h"
50 #include "dwarf2/sect-names.h"
51 #include "dwarf2/public.h"
53 #include "gdb-stabs.h"
55 /* For interface with stabsread.c. */
56 #include "aout/stab_gnu.h"
59 /* We put a pointer to this structure in the read_symtab_private field
65 /* First symbol number for this file. */
69 /* Number of symbols in the section of the symbol table devoted to
70 this file's symbols (actually, the section bracketed may contain
71 more than just this file's symbols). If numsyms is 0, the only
72 reason for this thing's existence is the dependency list. Nothing
73 else will happen when it is read in. */
77 /* Position of the start of the line number information for this
79 unsigned int lineno_off
;
82 /* Remember what we deduced to be the source language of this psymtab. */
84 static enum language psymtab_language
= language_unknown
;
87 /* Simplified internal version of coff symbol table information. */
92 int c_symnum
; /* Symbol number of this entry. */
93 int c_naux
; /* 0 if syment only, 1 if syment + auxent. */
95 unsigned char c_sclass
;
100 /* Last function's saved coff symbol `cs'. */
102 static struct xcoff_symbol fcn_cs_saved
;
104 static bfd
*symfile_bfd
;
106 /* Core address of start and end of text of current source file.
107 This is calculated from the first function seen after a C_FILE
111 static CORE_ADDR cur_src_end_addr
;
113 /* Core address of the end of the first object file. */
115 static CORE_ADDR first_object_file_end
;
117 /* Initial symbol-table-debug-string vector length. */
119 #define INITIAL_STABVECTOR_LENGTH 40
121 /* Size of a COFF symbol. I think it is always 18, so I'm not sure
122 there is any reason not to just use a #define, but might as well
123 ask BFD for the size and store it here, I guess. */
125 static unsigned local_symesz
;
127 struct xcoff_symfile_info
129 file_ptr min_lineno_offset
{}; /* Where in file lowest line#s are. */
130 file_ptr max_lineno_offset
{}; /* 1+last byte of line#s in file. */
132 /* Pointer to the string table. */
133 char *strtbl
= nullptr;
135 /* Pointer to debug section. */
136 char *debugsec
= nullptr;
138 /* Pointer to the a.out symbol table. */
139 char *symtbl
= nullptr;
141 /* Number of symbols in symtbl. */
142 int symtbl_num_syms
= 0;
144 /* Offset in data section to TOC anchor. */
145 CORE_ADDR toc_offset
= 0;
148 /* Key for XCOFF-associated data. */
150 static const registry
<objfile
>::key
<xcoff_symfile_info
> xcoff_objfile_data_key
;
152 /* Convenience macro to access the per-objfile XCOFF data. */
154 #define XCOFF_DATA(objfile) \
155 xcoff_objfile_data_key.get (objfile)
157 /* XCOFF names for dwarf sections. There is no compressed sections. */
159 static const struct dwarf2_debug_sections dwarf2_xcoff_names
= {
161 { ".dwabrev", NULL
},
164 { NULL
, NULL
}, /* debug_loclists */
165 /* AIX XCOFF defines one, named DWARF section for macro debug information.
166 XLC does not generate debug_macinfo for DWARF4 and below.
167 The section is assigned to debug_macro for DWARF5 and above. */
171 { NULL
, NULL
}, /* debug_str_offsets */
172 { NULL
, NULL
}, /* debug_line_str */
173 { ".dwrnges", NULL
},
174 { NULL
, NULL
}, /* debug_rnglists */
175 { ".dwpbtyp", NULL
},
176 { NULL
, NULL
}, /* debug_addr */
177 { ".dwframe", NULL
},
178 { NULL
, NULL
}, /* eh_frame */
179 { NULL
, NULL
}, /* gdb_index */
180 { NULL
, NULL
}, /* debug_names */
181 { NULL
, NULL
}, /* debug_aranges */
186 bf_notfound_complaint (void)
188 complaint (_("line numbers off, `.bf' symbol not found"));
192 ef_complaint (int arg1
)
194 complaint (_("Mismatched .ef symbol ignored starting at symnum %d"), arg1
);
198 eb_complaint (int arg1
)
200 complaint (_("Mismatched .eb symbol ignored starting at symnum %d"), arg1
);
203 static void xcoff_initial_scan (struct objfile
*, symfile_add_flags
);
205 static void scan_xcoff_symtab (minimal_symbol_reader
&,
206 psymtab_storage
*partial_symtabs
,
209 static const char *xcoff_next_symbol_text (struct objfile
*);
211 static void record_include_begin (struct xcoff_symbol
*);
214 enter_line_range (struct subfile
*, unsigned, unsigned,
215 CORE_ADDR
, CORE_ADDR
, unsigned *);
217 static void init_stringtab (bfd
*, file_ptr
, struct objfile
*);
219 static void xcoff_symfile_init (struct objfile
*);
221 static void xcoff_new_init (struct objfile
*);
223 static void xcoff_symfile_finish (struct objfile
*);
225 static char *coff_getfilename (union internal_auxent
*, struct objfile
*);
227 static void read_symbol (struct internal_syment
*, int);
229 static int read_symbol_lineno (int);
231 static CORE_ADDR
read_symbol_nvalue (int);
233 static struct symbol
*process_xcoff_symbol (struct xcoff_symbol
*,
236 static void read_xcoff_symtab (struct objfile
*, legacy_psymtab
*);
239 static void add_stab_to_list (char *, struct pending_stabs
**);
242 static void record_include_end (struct xcoff_symbol
*);
244 static void process_linenos (CORE_ADDR
, CORE_ADDR
);
247 /* Translate from a COFF section number (target_index) to a SECT_OFF_*
249 static int secnum_to_section (int, struct objfile
*);
250 static asection
*secnum_to_bfd_section (int, struct objfile
*);
252 struct xcoff_find_targ_sec_arg
257 struct objfile
*objfile
;
260 static void find_targ_sec (bfd
*, asection
*, void *);
263 find_targ_sec (bfd
*abfd
, asection
*sect
, void *obj
)
265 struct xcoff_find_targ_sec_arg
*args
266 = (struct xcoff_find_targ_sec_arg
*) obj
;
267 struct objfile
*objfile
= args
->objfile
;
269 if (sect
->target_index
== args
->targ_index
)
271 /* This is the section. Figure out what SECT_OFF_* code it is. */
272 if (bfd_section_flags (sect
) & SEC_CODE
)
273 *args
->resultp
= SECT_OFF_TEXT (objfile
);
274 else if (bfd_section_flags (sect
) & SEC_LOAD
)
275 *args
->resultp
= SECT_OFF_DATA (objfile
);
277 *args
->resultp
= gdb_bfd_section_index (abfd
, sect
);
278 *args
->bfd_sect
= sect
;
282 /* Search all BFD sections for the section whose target_index is
283 equal to N_SCNUM. Set *BFD_SECT to that section. The section's
284 associated index in the objfile's section_offset table is also
287 If no match is found, *BFD_SECT is set to NULL, and *SECNUM
288 is set to the text section's number. */
291 xcoff_secnum_to_sections (int n_scnum
, struct objfile
*objfile
,
292 asection
**bfd_sect
, int *secnum
)
294 struct xcoff_find_targ_sec_arg args
;
296 args
.targ_index
= n_scnum
;
297 args
.resultp
= secnum
;
298 args
.bfd_sect
= bfd_sect
;
299 args
.objfile
= objfile
;
302 *secnum
= SECT_OFF_TEXT (objfile
);
304 bfd_map_over_sections (objfile
->obfd
.get (), find_targ_sec
, &args
);
307 /* Return the section number (SECT_OFF_*) that N_SCNUM points to. */
310 secnum_to_section (int n_scnum
, struct objfile
*objfile
)
315 xcoff_secnum_to_sections (n_scnum
, objfile
, &ignored
, &secnum
);
319 /* Return the BFD section that N_SCNUM points to. */
322 secnum_to_bfd_section (int n_scnum
, struct objfile
*objfile
)
327 xcoff_secnum_to_sections (n_scnum
, objfile
, &bfd_sect
, &ignored
);
331 /* add a given stab string into given stab vector. */
336 add_stab_to_list (char *stabname
, struct pending_stabs
**stabvector
)
338 if (*stabvector
== NULL
)
340 *stabvector
= (struct pending_stabs
*)
341 xmalloc (sizeof (struct pending_stabs
) +
342 INITIAL_STABVECTOR_LENGTH
* sizeof (char *));
343 (*stabvector
)->count
= 0;
344 (*stabvector
)->length
= INITIAL_STABVECTOR_LENGTH
;
346 else if ((*stabvector
)->count
>= (*stabvector
)->length
)
348 (*stabvector
)->length
+= INITIAL_STABVECTOR_LENGTH
;
349 *stabvector
= (struct pending_stabs
*)
350 xrealloc ((char *) *stabvector
, sizeof (struct pending_stabs
) +
351 (*stabvector
)->length
* sizeof (char *));
353 (*stabvector
)->stab
[(*stabvector
)->count
++] = stabname
;
358 /* Linenos are processed on a file-by-file basis.
362 1) xlc (IBM's native c compiler) postpones static function code
363 emission to the end of a compilation unit. This way it can
364 determine if those functions (statics) are needed or not, and
365 can do some garbage collection (I think). This makes line
366 numbers and corresponding addresses unordered, and we end up
367 with a line table like:
384 and that breaks gdb's binary search on line numbers, if the
385 above table is not sorted on line numbers. And that sort
386 should be on function based, since gcc can emit line numbers
389 10 0x100 - for the init/test part of a for stmt.
392 10 0x400 - for the increment part of a for stmt.
394 arrange_linetable() will do this sorting.
396 2) aix symbol table might look like:
398 c_file // beginning of a new file
399 .bi // beginning of include file
400 .ei // end of include file
404 basically, .bi/.ei pairs do not necessarily encapsulate
405 their scope. They need to be recorded, and processed later
406 on when we come the end of the compilation unit.
407 Include table (inclTable) and process_linenos() handle
411 /* Given a line table with function entries are marked, arrange its
412 functions in ascending order and strip off function entry markers
413 and return it in a newly created table. */
415 /* FIXME: I think all this stuff can be replaced by just passing
416 sort_linevec = 1 to end_compunit_symtab. */
419 arrange_linetable (std::vector
<linetable_entry
> &old_linetable
)
421 std::vector
<linetable_entry
> fentries
;
423 for (int ii
= 0; ii
< old_linetable
.size (); ++ii
)
425 if (!old_linetable
[ii
].is_stmt
)
428 if (old_linetable
[ii
].line
== 0)
430 /* Function entry found. */
431 fentries
.emplace_back ();
432 linetable_entry
&e
= fentries
.back ();
435 e
.set_raw_pc (old_linetable
[ii
].raw_pc ());
439 if (fentries
.empty ())
442 std::sort (fentries
.begin (), fentries
.end ());
444 /* Allocate a new line table. */
445 std::vector
<linetable_entry
> new_linetable
;
446 new_linetable
.reserve (old_linetable
.size ());
448 /* If line table does not start with a function beginning, copy up until
450 for (int i
= 0; i
< old_linetable
.size () && old_linetable
[i
].line
!= 0; ++i
)
451 new_linetable
.push_back (old_linetable
[i
]);
453 /* Now copy function lines one by one. */
454 for (const linetable_entry
&entry
: fentries
)
456 /* If the function was compiled with XLC, we may have to add an
457 extra line to cover the function prologue. */
459 if (jj
+ 1 < old_linetable
.size ()
460 && old_linetable
[jj
].raw_pc () != old_linetable
[jj
+ 1].raw_pc ())
462 new_linetable
.push_back (old_linetable
[jj
]);
463 new_linetable
.back ().line
= old_linetable
[jj
+ 1].line
;
466 for (jj
= entry
.line
+ 1;
467 jj
< old_linetable
.size () && old_linetable
[jj
].line
!= 0;
469 new_linetable
.push_back (old_linetable
[jj
]);
472 new_linetable
.shrink_to_fit ();
473 old_linetable
= std::move (new_linetable
);
476 /* include file support: C_BINCL/C_EINCL pairs will be kept in the
477 following `IncludeChain'. At the end of each symtab (end_compunit_symtab),
478 we will determine if we should create additional symtab's to
479 represent if (the include files. */
482 typedef struct _inclTable
484 char *name
; /* include filename */
486 /* Offsets to the line table. end points to the last entry which is
487 part of this include file. */
490 struct subfile
*subfile
;
491 unsigned funStartLine
; /* Start line # of its function. */
495 #define INITIAL_INCLUDE_TABLE_LENGTH 20
496 static InclTable
*inclTable
; /* global include table */
497 static int inclIndx
; /* last entry to table */
498 static int inclLength
; /* table length */
499 static int inclDepth
; /* nested include depth */
501 static void allocate_include_entry (void);
504 record_include_begin (struct xcoff_symbol
*cs
)
508 /* In xcoff, we assume include files cannot be nested (not in .c files
509 of course, but in corresponding .s files.). */
511 /* This can happen with old versions of GCC.
512 GCC 2.3.3-930426 does not exhibit this on a test case which
513 a user said produced the message for him. */
514 complaint (_("Nested C_BINCL symbols"));
518 allocate_include_entry ();
520 inclTable
[inclIndx
].name
= cs
->c_name
;
521 inclTable
[inclIndx
].begin
= cs
->c_value
;
525 record_include_end (struct xcoff_symbol
*cs
)
531 complaint (_("Mismatched C_BINCL/C_EINCL pair"));
534 allocate_include_entry ();
536 pTbl
= &inclTable
[inclIndx
];
537 pTbl
->end
= cs
->c_value
;
544 allocate_include_entry (void)
546 if (inclTable
== NULL
)
548 inclTable
= XCNEWVEC (InclTable
, INITIAL_INCLUDE_TABLE_LENGTH
);
549 inclLength
= INITIAL_INCLUDE_TABLE_LENGTH
;
552 else if (inclIndx
>= inclLength
)
554 inclLength
+= INITIAL_INCLUDE_TABLE_LENGTH
;
555 inclTable
= XRESIZEVEC (InclTable
, inclTable
, inclLength
);
556 memset (inclTable
+ inclLength
- INITIAL_INCLUDE_TABLE_LENGTH
,
557 '\0', sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
561 /* Global variable to pass the psymtab down to all the routines involved
562 in psymtab to symtab processing. */
563 static legacy_psymtab
*this_symtab_psymtab
;
565 /* Objfile related to this_symtab_psymtab; set at the same time. */
566 static struct objfile
*this_symtab_objfile
;
568 /* given the start and end addresses of a compilation unit (or a csect,
569 at times) process its lines and create appropriate line vectors. */
572 process_linenos (CORE_ADDR start
, CORE_ADDR end
)
576 = XCOFF_DATA (this_symtab_objfile
)->max_lineno_offset
;
578 /* subfile structure for the main compilation unit. */
579 struct subfile main_subfile
;
581 /* In the main source file, any time we see a function entry, we
582 reset this variable to function's absolute starting line number.
583 All the following line numbers in the function are relative to
584 this, and we record absolute line numbers in record_line(). */
586 unsigned int main_source_baseline
= 0;
591 ((struct xcoff_symloc
*) this_symtab_psymtab
->read_symtab_private
)->lineno_off
;
593 goto return_after_cleanup
;
596 /* All source lines were in the main source file. None in include
599 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
600 &main_source_baseline
);
604 /* There was source with line numbers in include files. */
607 coff_data (this_symtab_objfile
->obfd
)->local_linesz
;
608 main_source_baseline
= 0;
610 for (int ii
= 0; ii
< inclIndx
; ++ii
)
612 /* If there is main file source before include file, enter it. */
613 if (offset
< inclTable
[ii
].begin
)
616 (&main_subfile
, offset
, inclTable
[ii
].begin
- linesz
,
617 start
, 0, &main_source_baseline
);
620 if (strcmp (inclTable
[ii
].name
, get_last_source_file ()) == 0)
622 /* The entry in the include table refers to the main source
623 file. Add the lines to the main subfile. */
625 main_source_baseline
= inclTable
[ii
].funStartLine
;
627 (&main_subfile
, inclTable
[ii
].begin
, inclTable
[ii
].end
,
628 start
, 0, &main_source_baseline
);
629 inclTable
[ii
].subfile
= &main_subfile
;
633 /* Have a new subfile for the include file. */
634 inclTable
[ii
].subfile
= new subfile
;
636 firstLine
= &(inclTable
[ii
].funStartLine
);
638 /* Enter include file's lines now. */
639 enter_line_range (inclTable
[ii
].subfile
, inclTable
[ii
].begin
,
640 inclTable
[ii
].end
, start
, 0, firstLine
);
643 if (offset
<= inclTable
[ii
].end
)
644 offset
= inclTable
[ii
].end
+ linesz
;
647 /* All the include files' line have been processed at this point. Now,
648 enter remaining lines of the main file, if any left. */
649 if (offset
< max_offset
+ 1 - linesz
)
651 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
652 &main_source_baseline
);
656 /* Process main file's line numbers. */
657 if (!main_subfile
.line_vector_entries
.empty ())
659 /* Line numbers are not necessarily ordered. xlc compilation will
660 put static function to the end. */
661 arrange_linetable (main_subfile
.line_vector_entries
);
664 /* Now, process included files' line numbers. */
666 for (int ii
= 0; ii
< inclIndx
; ++ii
)
668 if (inclTable
[ii
].subfile
!= ((struct subfile
*) &main_subfile
)
669 && !inclTable
[ii
].subfile
->line_vector_entries
.empty ())
671 /* Line numbers are not necessarily ordered. xlc compilation will
672 put static function to the end. */
673 arrange_linetable (inclTable
[ii
].subfile
->line_vector_entries
);
677 /* For the same include file, we might want to have more than one
678 subfile. This happens if we have something like:
686 while foo.h including code in it. (stupid but possible)
687 Since start_subfile() looks at the name and uses an
688 existing one if finds, we need to provide a fake name and
692 start_subfile (inclTable
[ii
].name
);
695 /* Pick a fake name that will produce the same results as this
696 one when passed to deduce_language_from_filename. Kludge on
698 const char *fakename
= strrchr (inclTable
[ii
].name
, '.');
700 if (fakename
== NULL
)
702 start_subfile (fakename
);
704 struct subfile
*current_subfile
= get_current_subfile ();
705 current_subfile
->name
= inclTable
[ii
].name
;
706 current_subfile
->name_for_id
= inclTable
[ii
].name
;
709 start_subfile (pop_subfile ());
713 return_after_cleanup
:
715 /* We don't want to keep alloc/free'ing the global include file table. */
720 aix_process_linenos (struct objfile
*objfile
)
722 /* There is no linenos to read if there are only dwarf info. */
723 if (this_symtab_psymtab
== NULL
)
726 /* Process line numbers and enter them into line vector. */
727 process_linenos (get_last_source_start_addr (), cur_src_end_addr
);
731 /* Enter a given range of lines into the line vector.
732 can be called in the following two ways:
733 enter_line_range (subfile, beginoffset, endoffset,
734 startaddr, 0, firstLine) or
735 enter_line_range (subfile, beginoffset, 0,
736 startaddr, endaddr, firstLine)
738 endoffset points to the last line table entry that we should pay
742 enter_line_range (struct subfile
*subfile
, unsigned beginoffset
,
743 unsigned endoffset
, /* offsets to line table */
744 CORE_ADDR startaddr
, /* offsets to line table */
745 CORE_ADDR endaddr
, unsigned *firstLine
)
747 struct objfile
*objfile
= this_symtab_objfile
;
748 struct gdbarch
*gdbarch
= objfile
->arch ();
749 unsigned int curoffset
;
752 struct internal_lineno int_lnno
;
753 unsigned int limit_offset
;
757 if (endoffset
== 0 && startaddr
== 0 && endaddr
== 0)
759 curoffset
= beginoffset
;
760 limit_offset
= XCOFF_DATA (objfile
)->max_lineno_offset
;
764 if (endoffset
>= limit_offset
)
766 complaint (_("Bad line table offset in C_EINCL directive"));
769 limit_offset
= endoffset
;
774 abfd
= objfile
->obfd
.get ();
775 linesz
= coff_data (abfd
)->local_linesz
;
776 ext_lnno
= alloca (linesz
);
778 while (curoffset
<= limit_offset
)
780 bfd_seek (abfd
, curoffset
, SEEK_SET
);
781 bfd_bread (ext_lnno
, linesz
, abfd
);
782 bfd_coff_swap_lineno_in (abfd
, ext_lnno
, &int_lnno
);
784 /* Find the address this line represents. */
785 addr
= (int_lnno
.l_lnno
786 ? int_lnno
.l_addr
.l_paddr
787 : read_symbol_nvalue (int_lnno
.l_addr
.l_symndx
));
788 addr
+= objfile
->text_section_offset ();
790 if (addr
< startaddr
|| (endaddr
&& addr
>= endaddr
))
793 CORE_ADDR record_addr
= (gdbarch_addr_bits_remove (gdbarch
, addr
)
794 - objfile
->text_section_offset ());
795 if (int_lnno
.l_lnno
== 0)
797 *firstLine
= read_symbol_lineno (int_lnno
.l_addr
.l_symndx
);
798 record_line (subfile
, 0, unrelocated_addr (record_addr
));
802 record_line (subfile
, *firstLine
+ int_lnno
.l_lnno
,
803 unrelocated_addr (record_addr
));
809 /* Save the vital information for use when closing off the current file.
810 NAME is the file name the symbols came from, START_ADDR is the first
811 text address for the file, and SIZE is the number of bytes of text. */
813 #define complete_symtab(name, start_addr) { \
814 set_last_source_file (name); \
815 set_last_source_start_addr (start_addr); \
819 /* Refill the symbol table input buffer
820 and set the variables that control fetching entries from it.
821 Reports an error if no data available.
822 This function can read past the end of the symbol table
823 (into the string table) but this does no harm. */
825 /* Create a new minimal symbol (using record_with_info).
827 Creation of all new minimal symbols should go through this function
828 rather than calling the various record functions in order
829 to make sure that all symbol addresses get properly relocated.
833 NAME - the symbol's name (but if NAME starts with a period, that
834 leading period is discarded).
835 ADDRESS - the symbol's address, prior to relocation. This function
836 relocates the address before recording the minimal symbol.
837 MS_TYPE - the symbol's type.
838 N_SCNUM - the symbol's XCOFF section number.
839 OBJFILE - the objfile associated with the minimal symbol. */
842 record_minimal_symbol (minimal_symbol_reader
&reader
,
843 const char *name
, unrelocated_addr address
,
844 enum minimal_symbol_type ms_type
,
846 struct objfile
*objfile
)
851 reader
.record_with_info (name
, address
, ms_type
,
852 secnum_to_section (n_scnum
, objfile
));
855 /* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be
856 nested. At any given time, a symbol can only be in one static block.
857 This is the base address of current static block, zero if non exists. */
859 static int static_block_base
= 0;
861 /* Section number for the current static block. */
863 static int static_block_section
= -1;
865 /* true if space for symbol name has been allocated. */
867 static int symname_alloced
= 0;
869 /* Next symbol to read. Pointer into raw seething symbol table. */
871 static char *raw_symbol
;
873 /* This is the function which stabsread.c calls to get symbol
877 xcoff_next_symbol_text (struct objfile
*objfile
)
879 struct internal_syment symbol
;
882 /* FIXME: is this the same as the passed arg? */
883 if (this_symtab_objfile
)
884 objfile
= this_symtab_objfile
;
886 bfd_coff_swap_sym_in (objfile
->obfd
.get (), raw_symbol
, &symbol
);
889 complaint (_("Unexpected symbol continuation"));
891 /* Return something which points to '\0' and hope the symbol reading
892 code does something reasonable. */
895 else if (symbol
.n_sclass
& 0x80)
897 retval
= XCOFF_DATA (objfile
)->debugsec
+ symbol
.n_offset
;
898 raw_symbol
+= coff_data (objfile
->obfd
)->local_symesz
;
903 complaint (_("Unexpected symbol continuation"));
905 /* Return something which points to '\0' and hope the symbol reading
906 code does something reasonable. */
912 /* Read symbols for a given partial symbol table. */
915 read_xcoff_symtab (struct objfile
*objfile
, legacy_psymtab
*pst
)
917 bfd
*abfd
= objfile
->obfd
.get ();
918 char *raw_auxptr
; /* Pointer to first raw aux entry for sym. */
919 struct xcoff_symfile_info
*xcoff
= XCOFF_DATA (objfile
);
920 char *strtbl
= xcoff
->strtbl
;
921 char *debugsec
= xcoff
->debugsec
;
922 const char *debugfmt
= bfd_xcoff_is_xcoff64 (abfd
) ? "XCOFF64" : "XCOFF";
924 struct internal_syment symbol
[1];
925 union internal_auxent main_aux
;
926 struct xcoff_symbol cs
[1];
927 CORE_ADDR file_start_addr
= 0;
928 CORE_ADDR file_end_addr
= 0;
930 int next_file_symnum
= -1;
931 unsigned int max_symnum
;
932 int just_started
= 1;
934 CORE_ADDR fcn_start_addr
= 0;
935 enum language pst_symtab_language
;
937 struct xcoff_symbol fcn_stab_saved
= { 0 };
939 /* fcn_cs_saved is global because process_xcoff_symbol needs it. */
940 union internal_auxent fcn_aux_saved
{};
941 struct context_stack
*newobj
;
943 const char *filestring
= pst
->filename
; /* Name of the current file. */
945 const char *last_csect_name
; /* Last seen csect's name. */
947 this_symtab_psymtab
= pst
;
948 this_symtab_objfile
= objfile
;
950 /* Get the appropriate COFF "constants" related to the file we're
952 local_symesz
= coff_data (abfd
)->local_symesz
;
954 set_last_source_file (NULL
);
956 pst_symtab_language
= deduce_language_from_filename (filestring
);
959 start_compunit_symtab (objfile
, filestring
, NULL
, file_start_addr
,
960 pst_symtab_language
);
961 record_debugformat (debugfmt
);
962 symnum
= ((struct xcoff_symloc
*) pst
->read_symtab_private
)->first_symnum
;
964 symnum
+ ((struct xcoff_symloc
*) pst
->read_symtab_private
)->numsyms
;
965 first_object_file_end
= 0;
967 raw_symbol
= xcoff
->symtbl
+ symnum
* local_symesz
;
969 while (symnum
< max_symnum
)
971 QUIT
; /* make this command interruptable. */
973 /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */
974 /* read one symbol into `cs' structure. After processing the
975 whole symbol table, only string table will be kept in memory,
976 symbol table and debug section of xcoff will be freed. Thus
977 we can mark symbols with names in string table as
982 /* Swap and align the symbol into a reasonable C structure. */
983 bfd_coff_swap_sym_in (abfd
, raw_symbol
, symbol
);
985 cs
->c_symnum
= symnum
;
986 cs
->c_naux
= symbol
->n_numaux
;
987 if (symbol
->n_zeroes
)
990 /* We must use the original, unswapped, name here so the name field
991 pointed to by cs->c_name will persist throughout xcoffread. If
992 we use the new field, it gets overwritten for each symbol. */
993 cs
->c_name
= ((struct external_syment
*) raw_symbol
)->e
.e_name
;
994 /* If it's exactly E_SYMNMLEN characters long it isn't
996 if (cs
->c_name
[E_SYMNMLEN
- 1] != '\0')
1000 p
= (char *) obstack_alloc (&objfile
->objfile_obstack
,
1002 strncpy (p
, cs
->c_name
, E_SYMNMLEN
);
1003 p
[E_SYMNMLEN
] = '\0';
1005 symname_alloced
= 1;
1008 else if (symbol
->n_sclass
& 0x80)
1010 cs
->c_name
= debugsec
+ symbol
->n_offset
;
1011 symname_alloced
= 0;
1015 /* in string table */
1016 cs
->c_name
= strtbl
+ (int) symbol
->n_offset
;
1017 symname_alloced
= 1;
1019 cs
->c_value
= symbol
->n_value
;
1020 cs
->c_sclass
= symbol
->n_sclass
;
1021 cs
->c_secnum
= symbol
->n_scnum
;
1022 cs
->c_type
= (unsigned) symbol
->n_type
;
1024 raw_symbol
+= local_symesz
;
1027 /* Save addr of first aux entry. */
1028 raw_auxptr
= raw_symbol
;
1030 /* Skip all the auxents associated with this symbol. */
1031 for (ii
= symbol
->n_numaux
; ii
; --ii
)
1033 raw_symbol
+= coff_data (abfd
)->local_auxesz
;
1038 /* if symbol name starts with ".$" or "$", ignore it. */
1039 if (cs
->c_name
[0] == '$'
1040 || (cs
->c_name
[1] == '$' && cs
->c_name
[0] == '.'))
1043 if (cs
->c_symnum
== next_file_symnum
&& cs
->c_sclass
!= C_FILE
)
1045 if (get_last_source_file ())
1047 pst
->compunit_symtab
= end_compunit_symtab (cur_src_end_addr
);
1052 start_compunit_symtab (objfile
, "_globals_", NULL
,
1053 0, pst_symtab_language
);
1054 record_debugformat (debugfmt
);
1055 cur_src_end_addr
= first_object_file_end
;
1056 /* Done with all files, everything from here on is globals. */
1059 if (cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_HIDEXT
||
1060 cs
->c_sclass
== C_WEAKEXT
)
1062 /* Dealing with a symbol with a csect entry. */
1064 #define CSECT(PP) ((PP)->x_csect)
1065 #define CSECT_LEN(PP) (CSECT(PP).x_scnlen.u64)
1066 #define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp))
1067 #define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp))
1068 #define CSECT_SCLAS(PP) (CSECT(PP).x_smclas)
1070 /* Convert the auxent to something we can access.
1071 XCOFF can have more than one auxiliary entries.
1073 Actual functions will have two auxiliary entries, one to have the
1074 function size and other to have the smtype/smclass (LD/PR).
1076 c_type value of main symbol table will be set only in case of
1077 C_EXT/C_HIDEEXT/C_WEAKEXT storage class symbols.
1078 Bit 10 of type is set if symbol is a function, ie the value is set
1079 to 32(0x20). So we need to read the first function auxiliary entry
1080 which contains the size. */
1081 if (cs
->c_naux
> 1 && ISFCN (cs
->c_type
))
1083 /* a function entry point. */
1085 fcn_start_addr
= cs
->c_value
;
1087 /* save the function header info, which will be used
1088 when `.bf' is seen. */
1091 /* Convert the auxent to something we can access. */
1092 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1093 0, cs
->c_naux
, &fcn_aux_saved
);
1096 /* Read the csect auxiliary header, which is always the last by
1098 bfd_coff_swap_aux_in (abfd
,
1100 + ((coff_data (abfd
)->local_symesz
)
1101 * (cs
->c_naux
- 1)),
1102 cs
->c_type
, cs
->c_sclass
,
1103 cs
->c_naux
- 1, cs
->c_naux
,
1106 switch (CSECT_SMTYP (&main_aux
))
1110 /* Ignore all external references. */
1114 /* A section description. */
1116 switch (CSECT_SCLAS (&main_aux
))
1122 /* A program csect is seen. We have to allocate one
1123 symbol table for each program csect. Normally gdb
1124 prefers one symtab for each source file. In case
1125 of AIX, one source file might include more than one
1126 [PR] csect, and they don't have to be adjacent in
1127 terms of the space they occupy in memory. Thus, one
1128 single source file might get fragmented in the
1129 memory and gdb's file start and end address
1130 approach does not work! GCC (and I think xlc) seem
1131 to put all the code in the unnamed program csect. */
1133 if (last_csect_name
)
1135 complete_symtab (filestring
, file_start_addr
);
1136 cur_src_end_addr
= file_end_addr
;
1137 end_compunit_symtab (file_end_addr
);
1140 /* Give all csects for this source file the same
1142 start_compunit_symtab (objfile
, filestring
, NULL
,
1143 0, pst_symtab_language
);
1144 record_debugformat (debugfmt
);
1147 /* If this is the very first csect seen,
1148 basically `__start'. */
1151 first_object_file_end
1152 = cs
->c_value
+ CSECT_LEN (&main_aux
);
1157 cs
->c_value
+ objfile
->text_section_offset ();
1158 file_end_addr
= file_start_addr
+ CSECT_LEN (&main_aux
);
1160 if (cs
->c_name
&& (cs
->c_name
[0] == '.' || cs
->c_name
[0] == '@'))
1161 last_csect_name
= cs
->c_name
;
1165 /* All other symbols are put into the minimal symbol
1178 /* Ignore the symbol. */
1186 switch (CSECT_SCLAS (&main_aux
))
1188 /* We never really come to this part as this case has been
1189 handled in ISFCN check above.
1190 This and other cases of XTY_LD are kept just for
1196 /* shared library function trampoline code entry point. */
1200 /* The symbols often have the same names as debug symbols for
1201 functions, and confuse lookup_symbol. */
1205 /* xlc puts each variable in a separate csect, so we get
1206 an XTY_SD for each variable. But gcc puts several
1207 variables in a csect, so that each variable only gets
1208 an XTY_LD. This will typically be XMC_RW; I suspect
1209 XMC_RO and XMC_BS might be possible too.
1210 These variables are put in the minimal symbol table
1217 /* Common symbols are put into the minimal symbol table only. */
1225 switch (cs
->c_sclass
)
1229 /* c_value field contains symnum of next .file entry in table
1230 or symnum of first global after last .file. */
1232 next_file_symnum
= cs
->c_value
;
1234 /* Complete symbol table for last object file containing
1235 debugging information. */
1237 /* Whether or not there was a csect in the previous file, we
1238 have to call `end_stabs' and `start_stabs' to reset
1239 type_vector, line_vector, etc. structures. */
1241 complete_symtab (filestring
, file_start_addr
);
1242 cur_src_end_addr
= file_end_addr
;
1243 end_compunit_symtab (file_end_addr
);
1246 /* XCOFF, according to the AIX 3.2 documentation, puts the
1247 filename in cs->c_name. But xlc 1.3.0.2 has decided to
1248 do things the standard COFF way and put it in the auxent.
1249 We use the auxent if the symbol is ".file" and an auxent
1250 exists, otherwise use the symbol itself. Simple
1252 if (!strcmp (cs
->c_name
, ".file") && cs
->c_naux
> 0)
1254 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1255 0, cs
->c_naux
, &main_aux
);
1256 filestring
= coff_getfilename (&main_aux
, objfile
);
1259 filestring
= cs
->c_name
;
1262 start_compunit_symtab (objfile
, filestring
, NULL
, 0,
1263 pst_symtab_language
);
1264 record_debugformat (debugfmt
);
1265 last_csect_name
= 0;
1267 /* reset file start and end addresses. A compilation unit
1268 with no text (only data) should have zero file
1270 file_start_addr
= file_end_addr
= 0;
1274 fcn_stab_saved
= *cs
;
1278 if (strcmp (cs
->c_name
, ".bf") == 0)
1280 CORE_ADDR off
= objfile
->text_section_offset ();
1282 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1283 0, cs
->c_naux
, &main_aux
);
1285 within_function
= 1;
1287 newobj
= push_context (0, fcn_start_addr
+ off
);
1289 newobj
->name
= define_symbol
1290 (fcn_cs_saved
.c_value
+ off
,
1291 fcn_stab_saved
.c_name
, 0, 0, objfile
);
1292 if (newobj
->name
!= NULL
)
1293 newobj
->name
->set_section_index (SECT_OFF_TEXT (objfile
));
1295 else if (strcmp (cs
->c_name
, ".ef") == 0)
1297 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1298 0, cs
->c_naux
, &main_aux
);
1300 /* The value of .ef is the address of epilogue code;
1301 not useful for gdb. */
1302 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1303 contains number of lines to '}' */
1305 if (outermost_context_p ())
1306 { /* We attempted to pop an empty context stack. */
1307 ef_complaint (cs
->c_symnum
);
1308 within_function
= 0;
1311 struct context_stack cstk
= pop_context ();
1312 /* Stack must be empty now. */
1313 if (!outermost_context_p ())
1315 ef_complaint (cs
->c_symnum
);
1316 within_function
= 0;
1320 finish_block (cstk
.name
, cstk
.old_blocks
,
1321 NULL
, cstk
.start_addr
,
1322 (fcn_cs_saved
.c_value
1323 + fcn_aux_saved
.x_sym
.x_misc
.x_fsize
1324 + objfile
->text_section_offset ()));
1325 within_function
= 0;
1330 /* Begin static block. */
1332 struct internal_syment static_symbol
;
1334 read_symbol (&static_symbol
, cs
->c_value
);
1335 static_block_base
= static_symbol
.n_value
;
1336 static_block_section
=
1337 secnum_to_section (static_symbol
.n_scnum
, objfile
);
1342 /* End of static block. */
1343 static_block_base
= 0;
1344 static_block_section
= -1;
1355 complaint (_("Unrecognized storage class %d."),
1370 /* beginning of include file */
1371 /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted
1372 order. Thus, when wee see them, we might not know enough info
1373 to process them. Thus, we'll be saving them into a table
1374 (inclTable) and postpone their processing. */
1376 record_include_begin (cs
);
1380 /* End of include file. */
1381 /* See the comment after case C_BINCL. */
1382 record_include_end (cs
);
1386 if (strcmp (cs
->c_name
, ".bb") == 0)
1389 newobj
= push_context (depth
,
1391 + objfile
->text_section_offset ()));
1393 else if (strcmp (cs
->c_name
, ".eb") == 0)
1395 if (outermost_context_p ())
1396 { /* We attempted to pop an empty context stack. */
1397 eb_complaint (cs
->c_symnum
);
1400 struct context_stack cstk
= pop_context ();
1401 if (depth
-- != cstk
.depth
)
1403 eb_complaint (cs
->c_symnum
);
1406 if (*get_local_symbols () && !outermost_context_p ())
1408 /* Make a block for the local symbols within. */
1409 finish_block (cstk
.name
,
1410 cstk
.old_blocks
, NULL
,
1413 + objfile
->text_section_offset ()));
1415 *get_local_symbols () = cstk
.locals
;
1420 process_xcoff_symbol (cs
, objfile
);
1425 if (get_last_source_file ())
1427 struct compunit_symtab
*cust
;
1429 complete_symtab (filestring
, file_start_addr
);
1430 cur_src_end_addr
= file_end_addr
;
1431 cust
= end_compunit_symtab (file_end_addr
);
1432 /* When reading symbols for the last C_FILE of the objfile, try
1433 to make sure that we set pst->compunit_symtab to the symtab for the
1434 file, not to the _globals_ symtab. I'm not sure whether this
1435 actually works right or when/if it comes up. */
1436 if (pst
->compunit_symtab
== NULL
)
1437 pst
->compunit_symtab
= cust
;
1442 #define SYMNAME_ALLOC(NAME, ALLOCED) \
1443 ((ALLOCED) ? (NAME) : obstack_strdup (&objfile->objfile_obstack, \
1447 /* process one xcoff symbol. */
1449 static struct symbol
*
1450 process_xcoff_symbol (struct xcoff_symbol
*cs
, struct objfile
*objfile
)
1452 struct symbol onesymbol
;
1453 struct symbol
*sym
= &onesymbol
;
1454 struct symbol
*sym2
= NULL
;
1460 if (cs
->c_secnum
< 0)
1462 /* The value is a register number, offset within a frame, etc.,
1463 and does not get relocated. */
1469 sec
= secnum_to_section (cs
->c_secnum
, objfile
);
1470 off
= objfile
->section_offsets
[sec
];
1477 /* default assumptions */
1478 sym
->set_value_address (cs
->c_value
+ off
);
1479 sym
->set_domain (VAR_DOMAIN
);
1480 sym
->set_section_index (secnum_to_section (cs
->c_secnum
, objfile
));
1482 if (ISFCN (cs
->c_type
))
1484 /* At this point, we don't know the type of the function. This
1485 will be patched with the type from its stab entry later on in
1486 patch_block_stabs (), unless the file was compiled without -g. */
1488 sym
->set_linkage_name (SYMNAME_ALLOC (name
, symname_alloced
));
1489 sym
->set_type (builtin_type (objfile
)->nodebug_text_symbol
);
1491 sym
->set_aclass_index (LOC_BLOCK
);
1492 sym2
= new (&objfile
->objfile_obstack
) symbol (*sym
);
1494 if (cs
->c_sclass
== C_EXT
|| C_WEAKEXT
)
1495 add_symbol_to_list (sym2
, get_global_symbols ());
1496 else if (cs
->c_sclass
== C_HIDEXT
|| cs
->c_sclass
== C_STAT
)
1497 add_symbol_to_list (sym2
, get_file_symbols ());
1501 /* In case we can't figure out the type, provide default. */
1502 sym
->set_type (builtin_type (objfile
)->nodebug_data_symbol
);
1504 switch (cs
->c_sclass
)
1507 /* The values of functions and global symbols are now resolved
1508 via the global_sym_chain in stabsread.c. */
1510 if (fcn_cs_saved
.c_sclass
== C_EXT
)
1511 add_stab_to_list (name
, &global_stabs
);
1513 add_stab_to_list (name
, &file_stabs
);
1517 add_stab_to_list (name
, &global_stabs
);
1522 common_block_start (cs
->c_name
, objfile
);
1526 common_block_end (objfile
);
1530 complaint (_("Unexpected storage class: %d"),
1543 sym
= define_symbol (cs
->c_value
+ off
, cs
->c_name
, 0, 0, objfile
);
1546 sym
->set_section_index (sec
);
1553 /* For xlc (not GCC), the 'V' symbol descriptor is used for
1554 all statics and we need to distinguish file-scope versus
1555 function-scope using within_function. We do this by
1556 changing the string we pass to define_symbol to use 'S'
1557 where we need to, which is not necessarily super-clean,
1558 but seems workable enough. */
1563 pp
= strchr (name
, ':');
1568 if (*pp
== 'V' && !within_function
)
1570 sym
= define_symbol ((cs
->c_value
1571 + objfile
->section_offsets
[static_block_section
]),
1572 cs
->c_name
, 0, 0, objfile
);
1575 sym
->set_value_address
1576 (sym
->value_address () + static_block_base
);
1577 sym
->set_section_index (static_block_section
);
1586 /* Extract the file name from the aux entry of a C_FILE symbol.
1587 Result is in static storage and is only good for temporary use. */
1590 coff_getfilename (union internal_auxent
*aux_entry
, struct objfile
*objfile
)
1592 static char buffer
[BUFSIZ
];
1594 if (aux_entry
->x_file
.x_n
.x_n
.x_zeroes
== 0)
1595 strcpy (buffer
, (XCOFF_DATA (objfile
)->strtbl
1596 + aux_entry
->x_file
.x_n
.x_n
.x_offset
));
1599 strncpy (buffer
, aux_entry
->x_file
.x_n
.x_fname
, FILNMLEN
);
1600 buffer
[FILNMLEN
] = '\0';
1605 /* Set *SYMBOL to symbol number symno in symtbl. */
1607 read_symbol (struct internal_syment
*symbol
, int symno
)
1609 struct xcoff_symfile_info
*xcoff
= XCOFF_DATA (this_symtab_objfile
);
1610 int nsyms
= xcoff
->symtbl_num_syms
;
1611 char *stbl
= xcoff
->symtbl
;
1613 if (symno
< 0 || symno
>= nsyms
)
1615 complaint (_("Invalid symbol offset"));
1616 symbol
->n_value
= 0;
1617 symbol
->n_scnum
= -1;
1620 bfd_coff_swap_sym_in (this_symtab_objfile
->obfd
.get (),
1621 stbl
+ (symno
* local_symesz
),
1625 /* Get value corresponding to symbol number symno in symtbl. */
1628 read_symbol_nvalue (int symno
)
1630 struct internal_syment symbol
[1];
1632 read_symbol (symbol
, symno
);
1633 return symbol
->n_value
;
1637 /* Find the address of the function corresponding to symno, where
1638 symno is the symbol pointed to by the linetable. */
1641 read_symbol_lineno (int symno
)
1643 struct objfile
*objfile
= this_symtab_objfile
;
1644 int xcoff64
= bfd_xcoff_is_xcoff64 (objfile
->obfd
);
1646 struct xcoff_symfile_info
*info
= XCOFF_DATA (objfile
);
1647 int nsyms
= info
->symtbl_num_syms
;
1648 char *stbl
= info
->symtbl
;
1649 char *strtbl
= info
->strtbl
;
1651 struct internal_syment symbol
[1];
1652 union internal_auxent main_aux
[1];
1656 bf_notfound_complaint ();
1660 /* Note that just searching for a short distance (e.g. 50 symbols)
1661 is not enough, at least in the following case.
1664 [many .stabx entries]
1665 [a few functions, referring to foo]
1669 What happens here is that the assembler moves the .stabx entries
1670 to right before the ".bf" for foo, but the symbol for "foo" is before
1671 all the stabx entries. See PR gdb/2222. */
1673 /* Maintaining a table of .bf entries might be preferable to this search.
1674 If I understand things correctly it would need to be done only for
1675 the duration of a single psymtab to symtab conversion. */
1676 while (symno
< nsyms
)
1678 bfd_coff_swap_sym_in (symfile_bfd
,
1679 stbl
+ (symno
* local_symesz
), symbol
);
1680 if (symbol
->n_sclass
== C_FCN
)
1682 char *name
= xcoff64
? strtbl
+ symbol
->n_offset
: symbol
->n_name
;
1684 if (strcmp (name
, ".bf") == 0)
1687 symno
+= symbol
->n_numaux
+ 1;
1690 bf_notfound_complaint ();
1694 /* Take aux entry and return its lineno. */
1696 bfd_coff_swap_aux_in (objfile
->obfd
.get (), stbl
+ symno
* local_symesz
,
1697 symbol
->n_type
, symbol
->n_sclass
,
1698 0, symbol
->n_numaux
, main_aux
);
1700 return main_aux
->x_sym
.x_misc
.x_lnsz
.x_lnno
;
1703 /* Support for line number handling. */
1705 /* This function is called for every section; it finds the outer limits
1706 * of the line table (minimum and maximum file offset) so that the
1707 * mainline code can read the whole thing for efficiency.
1710 find_linenos (struct bfd
*abfd
, struct bfd_section
*asect
, void *vpinfo
)
1712 struct xcoff_symfile_info
*info
;
1714 file_ptr offset
, maxoff
;
1716 count
= asect
->lineno_count
;
1718 if (strcmp (asect
->name
, ".text") != 0 || count
== 0)
1721 size
= count
* coff_data (abfd
)->local_linesz
;
1722 info
= (struct xcoff_symfile_info
*) vpinfo
;
1723 offset
= asect
->line_filepos
;
1724 maxoff
= offset
+ size
;
1726 if (offset
< info
->min_lineno_offset
|| info
->min_lineno_offset
== 0)
1727 info
->min_lineno_offset
= offset
;
1729 if (maxoff
> info
->max_lineno_offset
)
1730 info
->max_lineno_offset
= maxoff
;
1734 xcoff_expand_psymtab (legacy_psymtab
*pst
, struct objfile
*objfile
)
1736 gdb_assert (!pst
->readin
);
1738 /* Read in all partial symtabs on which this one is dependent. */
1739 pst
->expand_dependencies (objfile
);
1741 if (((struct xcoff_symloc
*) pst
->read_symtab_private
)->numsyms
!= 0)
1743 /* Init stuff necessary for reading in symbols. */
1746 scoped_free_pendings free_pending
;
1747 read_xcoff_symtab (objfile
, pst
);
1753 /* Read in all of the symbols for a given psymtab for real.
1754 Be verbose about it if the user wants that. SELF is not NULL. */
1757 xcoff_read_symtab (legacy_psymtab
*self
, struct objfile
*objfile
)
1759 gdb_assert (!self
->readin
);
1761 if (((struct xcoff_symloc
*) self
->read_symtab_private
)->numsyms
!= 0
1762 || self
->number_of_dependencies
)
1764 next_symbol_text_func
= xcoff_next_symbol_text
;
1766 self
->expand_psymtab (objfile
);
1768 /* Match with global symbols. This only needs to be done once,
1769 after all of the symtabs and dependencies have been read in. */
1770 scan_file_globals (objfile
);
1775 xcoff_new_init (struct objfile
*objfile
)
1777 stabsread_new_init ();
1780 /* Do initialization in preparation for reading symbols from OBJFILE.
1782 We will only be called if this is an XCOFF or XCOFF-like file.
1783 BFD handles figuring out the format of the file, and code in symfile.c
1784 uses BFD's determination to vector to us. */
1787 xcoff_symfile_init (struct objfile
*objfile
)
1789 /* Allocate struct to keep track of the symfile. */
1790 xcoff_objfile_data_key
.emplace (objfile
);
1793 /* Perform any local cleanups required when we are done with a particular
1794 objfile. I.E, we are in the process of discarding all symbol information
1795 for an objfile, freeing up all memory held for it, and unlinking the
1796 objfile struct from the global list of known objfiles. */
1799 xcoff_symfile_finish (struct objfile
*objfile
)
1801 /* Start with a fresh include table for the next objfile. */
1807 inclIndx
= inclLength
= inclDepth
= 0;
1812 init_stringtab (bfd
*abfd
, file_ptr offset
, struct objfile
*objfile
)
1816 unsigned char lengthbuf
[4];
1818 struct xcoff_symfile_info
*xcoff
= XCOFF_DATA (objfile
);
1820 xcoff
->strtbl
= NULL
;
1822 if (bfd_seek (abfd
, offset
, SEEK_SET
) < 0)
1823 error (_("cannot seek to string table in %s: %s"),
1824 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1826 val
= bfd_bread ((char *) lengthbuf
, sizeof lengthbuf
, abfd
);
1827 length
= bfd_h_get_32 (abfd
, lengthbuf
);
1829 /* If no string table is needed, then the file may end immediately
1830 after the symbols. Just return with `strtbl' set to NULL. */
1832 if (val
!= sizeof lengthbuf
|| length
< sizeof lengthbuf
)
1835 /* Allocate string table from objfile_obstack. We will need this table
1836 as long as we have its symbol table around. */
1838 strtbl
= (char *) obstack_alloc (&objfile
->objfile_obstack
, length
);
1839 xcoff
->strtbl
= strtbl
;
1841 /* Copy length buffer, the first byte is usually zero and is
1842 used for stabs with a name length of zero. */
1843 memcpy (strtbl
, lengthbuf
, sizeof lengthbuf
);
1844 if (length
== sizeof lengthbuf
)
1847 val
= bfd_bread (strtbl
+ sizeof lengthbuf
, length
- sizeof lengthbuf
, abfd
);
1849 if (val
!= length
- sizeof lengthbuf
)
1850 error (_("cannot read string table from %s: %s"),
1851 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1852 if (strtbl
[length
- 1] != '\0')
1853 error (_("bad symbol file: string table "
1854 "does not end with null character"));
1859 /* If we have not yet seen a function for this psymtab, this is 0. If we
1860 have seen one, it is the offset in the line numbers of the line numbers
1862 static unsigned int first_fun_line_offset
;
1864 /* Allocate and partially fill a partial symtab. It will be
1865 completely filled at the end of the symbol list.
1867 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
1868 is the address relative to which its symbols are (incremental) or 0
1871 static legacy_psymtab
*
1872 xcoff_start_psymtab (psymtab_storage
*partial_symtabs
,
1873 struct objfile
*objfile
,
1874 const char *filename
, int first_symnum
)
1876 /* We fill in textlow later. */
1877 legacy_psymtab
*result
= new legacy_psymtab (filename
, partial_symtabs
,
1879 unrelocated_addr (0));
1881 result
->read_symtab_private
=
1882 XOBNEW (&objfile
->objfile_obstack
, struct xcoff_symloc
);
1883 ((struct xcoff_symloc
*) result
->read_symtab_private
)->first_symnum
= first_symnum
;
1884 result
->legacy_read_symtab
= xcoff_read_symtab
;
1885 result
->legacy_expand_psymtab
= xcoff_expand_psymtab
;
1887 /* Deduce the source language from the filename for this psymtab. */
1888 psymtab_language
= deduce_language_from_filename (filename
);
1893 /* Close off the current usage of PST.
1894 Returns PST, or NULL if the partial symtab was empty and thrown away.
1896 CAPPING_SYMBOL_NUMBER is the end of pst (exclusive).
1898 INCLUDE_LIST, NUM_INCLUDES, DEPENDENCY_LIST, and NUMBER_DEPENDENCIES
1899 are the information for includes and dependencies. */
1901 static legacy_psymtab
*
1902 xcoff_end_psymtab (struct objfile
*objfile
, psymtab_storage
*partial_symtabs
,
1903 legacy_psymtab
*pst
,
1904 const char **include_list
, int num_includes
,
1905 int capping_symbol_number
,
1906 legacy_psymtab
**dependency_list
,
1907 int number_dependencies
, int textlow_not_set
)
1911 if (capping_symbol_number
!= -1)
1912 ((struct xcoff_symloc
*) pst
->read_symtab_private
)->numsyms
=
1913 capping_symbol_number
1914 - ((struct xcoff_symloc
*) pst
->read_symtab_private
)->first_symnum
;
1915 ((struct xcoff_symloc
*) pst
->read_symtab_private
)->lineno_off
=
1916 first_fun_line_offset
;
1917 first_fun_line_offset
= 0;
1921 pst
->number_of_dependencies
= number_dependencies
;
1922 if (number_dependencies
)
1925 = partial_symtabs
->allocate_dependencies (number_dependencies
);
1926 memcpy (pst
->dependencies
, dependency_list
,
1927 number_dependencies
* sizeof (legacy_psymtab
*));
1930 pst
->dependencies
= 0;
1932 for (i
= 0; i
< num_includes
; i
++)
1934 legacy_psymtab
*subpst
=
1935 new legacy_psymtab (include_list
[i
], partial_symtabs
, objfile
->per_bfd
);
1937 subpst
->read_symtab_private
= XOBNEW (&objfile
->objfile_obstack
, xcoff_symloc
);
1938 ((struct xcoff_symloc
*) subpst
->read_symtab_private
)->first_symnum
= 0;
1939 ((struct xcoff_symloc
*) subpst
->read_symtab_private
)->numsyms
= 0;
1941 /* We could save slight bits of space by only making one of these,
1942 shared by the entire set of include files. FIXME-someday. */
1943 subpst
->dependencies
=
1944 partial_symtabs
->allocate_dependencies (1);
1945 subpst
->dependencies
[0] = pst
;
1946 subpst
->number_of_dependencies
= 1;
1948 subpst
->legacy_read_symtab
= pst
->legacy_read_symtab
;
1949 subpst
->legacy_expand_psymtab
= pst
->legacy_expand_psymtab
;
1952 if (num_includes
== 0
1953 && number_dependencies
== 0
1956 /* Throw away this psymtab, it's empty. */
1957 /* Empty psymtabs happen as a result of header files which don't have
1958 any symbols in them. There can be a lot of them. */
1960 partial_symtabs
->discard_psymtab (pst
);
1962 /* Indicate that psymtab was thrown away. */
1968 /* Swap raw symbol at *RAW and put the name in *NAME, the symbol in
1969 *SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over
1970 the symbol and its auxents. */
1973 swap_sym (struct internal_syment
*symbol
, union internal_auxent
*aux
,
1974 const char **name
, char **raw
, unsigned int *symnump
,
1975 struct objfile
*objfile
)
1977 bfd_coff_swap_sym_in (objfile
->obfd
.get (), *raw
, symbol
);
1978 if (symbol
->n_zeroes
)
1980 /* If it's exactly E_SYMNMLEN characters long it isn't
1982 if (symbol
->n_name
[E_SYMNMLEN
- 1] != '\0')
1984 /* FIXME: wastes memory for symbols which we don't end up putting
1985 into the minimal symbols. */
1988 p
= (char *) obstack_alloc (&objfile
->objfile_obstack
,
1990 strncpy (p
, symbol
->n_name
, E_SYMNMLEN
);
1991 p
[E_SYMNMLEN
] = '\0';
1995 /* Point to the unswapped name as that persists as long as the
1997 *name
= ((struct external_syment
*) *raw
)->e
.e_name
;
1999 else if (symbol
->n_sclass
& 0x80)
2001 *name
= XCOFF_DATA (objfile
)->debugsec
+ symbol
->n_offset
;
2005 *name
= XCOFF_DATA (objfile
)->strtbl
+ symbol
->n_offset
;
2008 *raw
+= coff_data (objfile
->obfd
)->local_symesz
;
2009 if (symbol
->n_numaux
> 0)
2011 bfd_coff_swap_aux_in (objfile
->obfd
.get (), *raw
, symbol
->n_type
,
2012 symbol
->n_sclass
, 0, symbol
->n_numaux
, aux
);
2014 *symnump
+= symbol
->n_numaux
;
2015 *raw
+= coff_data (objfile
->obfd
)->local_symesz
* symbol
->n_numaux
;
2020 function_outside_compilation_unit_complaint (const char *arg1
)
2022 complaint (_("function `%s' appears to be defined "
2023 "outside of all compilation units"),
2028 scan_xcoff_symtab (minimal_symbol_reader
&reader
,
2029 psymtab_storage
*partial_symtabs
,
2030 struct objfile
*objfile
)
2032 CORE_ADDR toc_offset
= 0; /* toc offset value in data section. */
2033 const char *filestring
= NULL
;
2035 const char *namestring
;
2040 /* Current partial symtab */
2041 legacy_psymtab
*pst
;
2043 /* List of current psymtab's include files. */
2044 const char **psymtab_include_list
;
2045 int includes_allocated
;
2048 /* Index within current psymtab dependency list. */
2049 legacy_psymtab
**dependency_list
;
2050 int dependencies_used
, dependencies_allocated
;
2053 struct internal_syment symbol
;
2054 union internal_auxent main_aux
[5];
2055 unsigned int ssymnum
;
2057 const char *last_csect_name
= NULL
; /* Last seen csect's name and value. */
2058 unrelocated_addr last_csect_val
= unrelocated_addr (0);
2059 int last_csect_sec
= 0;
2060 int misc_func_recorded
= 0; /* true if any misc. function. */
2061 int textlow_not_set
= 1;
2063 pst
= (legacy_psymtab
*) 0;
2065 includes_allocated
= 30;
2067 psymtab_include_list
= (const char **) alloca (includes_allocated
*
2068 sizeof (const char *));
2070 dependencies_allocated
= 30;
2071 dependencies_used
= 0;
2073 (legacy_psymtab
**) alloca (dependencies_allocated
*
2074 sizeof (legacy_psymtab
*));
2076 set_last_source_file (NULL
);
2078 abfd
= objfile
->obfd
.get ();
2079 next_symbol_text_func
= xcoff_next_symbol_text
;
2081 sraw_symbol
= XCOFF_DATA (objfile
)->symtbl
;
2082 nsyms
= XCOFF_DATA (objfile
)->symtbl_num_syms
;
2084 while (ssymnum
< nsyms
)
2090 bfd_coff_swap_sym_in (abfd
, sraw_symbol
, &symbol
);
2091 sclass
= symbol
.n_sclass
;
2099 /* The CSECT auxent--always the last auxent. */
2100 union internal_auxent csect_aux
;
2101 unsigned int symnum_before
= ssymnum
;
2103 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2105 if (symbol
.n_numaux
> 1)
2107 bfd_coff_swap_aux_in
2108 (objfile
->obfd
.get (),
2109 sraw_symbol
- coff_data (abfd
)->local_symesz
,
2112 symbol
.n_numaux
- 1,
2117 csect_aux
= main_aux
[0];
2119 /* If symbol name starts with ".$" or "$", ignore it. */
2120 if (namestring
[0] == '$'
2121 || (namestring
[0] == '.' && namestring
[1] == '$'))
2124 switch (csect_aux
.x_csect
.x_smtyp
& 0x7)
2127 switch (csect_aux
.x_csect
.x_smclas
)
2130 if (last_csect_name
)
2132 /* If no misc. function recorded in the last
2133 seen csect, enter it as a function. This
2134 will take care of functions like strcmp()
2137 if (!misc_func_recorded
)
2139 record_minimal_symbol
2140 (reader
, last_csect_name
, last_csect_val
,
2141 mst_text
, last_csect_sec
, objfile
);
2142 misc_func_recorded
= 1;
2147 /* We have to allocate one psymtab for
2148 each program csect, because their text
2149 sections need not be adjacent. */
2151 (objfile
, partial_symtabs
, pst
, psymtab_include_list
,
2152 includes_used
, symnum_before
, dependency_list
,
2153 dependencies_used
, textlow_not_set
);
2155 dependencies_used
= 0;
2156 /* Give all psymtabs for this source file the same
2158 pst
= xcoff_start_psymtab
2159 (partial_symtabs
, objfile
,
2164 /* Activate the misc_func_recorded mechanism for
2165 compiler- and linker-generated CSECTs like ".strcmp"
2167 if (namestring
&& (namestring
[0] == '.'
2168 || namestring
[0] == '@'))
2170 last_csect_name
= namestring
;
2171 last_csect_val
= unrelocated_addr (symbol
.n_value
);
2172 last_csect_sec
= symbol
.n_scnum
;
2176 unrelocated_addr highval
2177 = unrelocated_addr (symbol
.n_value
2178 + CSECT_LEN (&csect_aux
));
2180 if (highval
> pst
->unrelocated_text_high ())
2181 pst
->set_text_high (highval
);
2182 unrelocated_addr loval
2183 = unrelocated_addr (symbol
.n_value
);
2184 if (!pst
->text_low_valid
2185 || loval
< pst
->unrelocated_text_low ())
2186 pst
->set_text_low (loval
);
2188 misc_func_recorded
= 0;
2193 /* Data variables are recorded in the minimal symbol
2194 table, except for section symbols. */
2195 if (*namestring
!= '.')
2196 record_minimal_symbol
2197 (reader
, namestring
, unrelocated_addr (symbol
.n_value
),
2198 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2199 symbol
.n_scnum
, objfile
);
2204 warning (_("More than one XMC_TC0 symbol found."));
2205 toc_offset
= symbol
.n_value
;
2207 /* Make TOC offset relative to start address of
2209 bfd_sect
= secnum_to_bfd_section (symbol
.n_scnum
, objfile
);
2211 toc_offset
-= bfd_section_vma (bfd_sect
);
2215 /* These symbols tell us where the TOC entry for a
2216 variable is, not the variable itself. */
2225 switch (csect_aux
.x_csect
.x_smclas
)
2228 /* A function entry point. */
2230 if (first_fun_line_offset
== 0 && symbol
.n_numaux
> 1)
2231 first_fun_line_offset
=
2232 main_aux
[0].x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
;
2234 record_minimal_symbol
2235 (reader
, namestring
, unrelocated_addr (symbol
.n_value
),
2236 sclass
== C_HIDEXT
? mst_file_text
: mst_text
,
2237 symbol
.n_scnum
, objfile
);
2238 misc_func_recorded
= 1;
2242 /* shared library function trampoline code entry
2245 /* record trampoline code entries as
2246 mst_solib_trampoline symbol. When we lookup mst
2247 symbols, we will choose mst_text over
2248 mst_solib_trampoline. */
2249 record_minimal_symbol
2250 (reader
, namestring
, unrelocated_addr (symbol
.n_value
),
2251 mst_solib_trampoline
, symbol
.n_scnum
, objfile
);
2252 misc_func_recorded
= 1;
2256 /* The symbols often have the same names as
2257 debug symbols for functions, and confuse
2263 /* xlc puts each variable in a separate csect,
2264 so we get an XTY_SD for each variable. But
2265 gcc puts several variables in a csect, so
2266 that each variable only gets an XTY_LD. We
2267 still need to record them. This will
2268 typically be XMC_RW; I suspect XMC_RO and
2269 XMC_BS might be possible too. */
2270 if (*namestring
!= '.')
2271 record_minimal_symbol
2272 (reader
, namestring
, unrelocated_addr (symbol
.n_value
),
2273 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2274 symbol
.n_scnum
, objfile
);
2280 switch (csect_aux
.x_csect
.x_smclas
)
2284 /* Common variables are recorded in the minimal symbol
2285 table, except for section symbols. */
2286 if (*namestring
!= '.')
2287 record_minimal_symbol
2288 (reader
, namestring
, unrelocated_addr (symbol
.n_value
),
2289 sclass
== C_HIDEXT
? mst_file_bss
: mst_bss
,
2290 symbol
.n_scnum
, objfile
);
2302 unsigned int symnum_before
;
2304 symnum_before
= ssymnum
;
2305 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2308 /* See if the last csect needs to be recorded. */
2310 if (last_csect_name
&& !misc_func_recorded
)
2312 /* If no misc. function recorded in the last seen csect, enter
2313 it as a function. This will take care of functions like
2314 strcmp() compiled by xlc. */
2316 record_minimal_symbol (reader
, last_csect_name
, last_csect_val
,
2317 mst_text
, last_csect_sec
, objfile
);
2318 misc_func_recorded
= 1;
2323 xcoff_end_psymtab (objfile
, partial_symtabs
,
2324 pst
, psymtab_include_list
,
2325 includes_used
, symnum_before
,
2326 dependency_list
, dependencies_used
,
2329 dependencies_used
= 0;
2331 first_fun_line_offset
= 0;
2333 /* XCOFF, according to the AIX 3.2 documentation, puts the
2334 filename in cs->c_name. But xlc 1.3.0.2 has decided to
2335 do things the standard COFF way and put it in the auxent.
2336 We use the auxent if the symbol is ".file" and an auxent
2337 exists, otherwise use the symbol itself. */
2338 if (!strcmp (namestring
, ".file") && symbol
.n_numaux
> 0)
2340 filestring
= coff_getfilename (&main_aux
[0], objfile
);
2343 filestring
= namestring
;
2345 pst
= xcoff_start_psymtab (partial_symtabs
, objfile
,
2348 last_csect_name
= NULL
;
2354 complaint (_("Storage class %d not recognized during scan"),
2360 /* C_FCN is .bf and .ef symbols. I think it is sufficient
2361 to handle only the C_FUN and C_EXT. */
2375 /* C_EINCL means we are switching back to the main file. But there
2376 is no reason to care; the only thing we want to know about
2377 includes is the names of all the included (.h) files. */
2382 /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be
2386 /* I don't think the name of the common block (as opposed to the
2387 variables within it) is something which is user visible
2395 /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL
2396 so C_LSYM would appear to be only for locals. */
2402 /* We probably could save a few instructions by assuming that
2403 C_LSYM, C_PSYM, etc., never have auxents. */
2404 int naux1
= symbol
.n_numaux
+ 1;
2407 sraw_symbol
+= bfd_coff_symesz (abfd
) * naux1
;
2413 /* Mark down an include file in the current psymtab. */
2414 enum language tmp_language
;
2416 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2419 tmp_language
= deduce_language_from_filename (namestring
);
2421 /* Only change the psymtab's language if we've learned
2422 something useful (eg. tmp_language is not language_unknown).
2423 In addition, to match what start_subfile does, never change
2425 if (tmp_language
!= language_unknown
2426 && (tmp_language
!= language_c
2427 || psymtab_language
!= language_cplus
))
2428 psymtab_language
= tmp_language
;
2430 /* In C++, one may expect the same filename to come round many
2431 times, when code is coming alternately from the main file
2432 and from inline functions in other files. So I check to see
2433 if this is a file we've seen before -- either the main
2434 source file, or a previously included file.
2436 This seems to be a lot of time to be spending on N_SOL, but
2437 things like "break c-exp.y:435" need to work (I
2438 suppose the psymtab_include_list could be hashed or put
2439 in a binary tree, if profiling shows this is a major hog). */
2440 if (pst
&& strcmp (namestring
, pst
->filename
) == 0)
2446 for (i
= 0; i
< includes_used
; i
++)
2447 if (strcmp (namestring
, psymtab_include_list
[i
]) == 0)
2455 psymtab_include_list
[includes_used
++] = namestring
;
2456 if (includes_used
>= includes_allocated
)
2458 const char **orig
= psymtab_include_list
;
2460 psymtab_include_list
= (const char **)
2461 alloca ((includes_allocated
*= 2) *
2462 sizeof (const char *));
2463 memcpy (psymtab_include_list
, orig
,
2464 includes_used
* sizeof (const char *));
2469 /* The value of the C_FUN is not the address of the function (it
2470 appears to be the address before linking), but as long as it
2471 is smaller than the actual address, then find_pc_partial_function
2472 will use the minimal symbols instead. I hope. */
2481 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2484 p
= strchr (namestring
, ':');
2486 continue; /* Not a debugging symbol. */
2488 /* Main processing section for debugging symbols which
2489 the initial read through the symbol tables needs to worry
2490 about. If we reach this point, the symbol which we are
2491 considering is definitely one we are interested in.
2492 p must also contain the (valid) index into the namestring
2493 which indicates the debugging type symbol. */
2498 pst
->add_psymbol (gdb::string_view (namestring
,
2500 true, VAR_DOMAIN
, LOC_STATIC
,
2501 SECT_OFF_DATA (objfile
),
2502 psymbol_placement::STATIC
,
2503 unrelocated_addr (symbol
.n_value
),
2505 partial_symtabs
, objfile
);
2509 /* The addresses in these entries are reported to be
2510 wrong. See the code that reads 'G's for symtabs. */
2511 pst
->add_psymbol (gdb::string_view (namestring
,
2513 true, VAR_DOMAIN
, LOC_STATIC
,
2514 SECT_OFF_DATA (objfile
),
2515 psymbol_placement::GLOBAL
,
2516 unrelocated_addr (symbol
.n_value
),
2518 partial_symtabs
, objfile
);
2522 /* When a 'T' entry is defining an anonymous enum, it
2523 may have a name which is the empty string, or a
2524 single space. Since they're not really defining a
2525 symbol, those shouldn't go in the partial symbol
2526 table. We do pick up the elements of such enums at
2527 'check_enum:', below. */
2528 if (p
>= namestring
+ 2
2529 || (p
== namestring
+ 1
2530 && namestring
[0] != ' '))
2532 pst
->add_psymbol (gdb::string_view (namestring
,
2534 true, STRUCT_DOMAIN
, LOC_TYPEDEF
, -1,
2535 psymbol_placement::STATIC
,
2536 unrelocated_addr (0),
2538 partial_symtabs
, objfile
);
2541 /* Also a typedef with the same name. */
2542 pst
->add_psymbol (gdb::string_view (namestring
,
2544 true, VAR_DOMAIN
, LOC_TYPEDEF
, -1,
2545 psymbol_placement::STATIC
,
2546 unrelocated_addr (0),
2548 partial_symtabs
, objfile
);
2555 if (p
!= namestring
) /* a name is there, not just :T... */
2557 pst
->add_psymbol (gdb::string_view (namestring
,
2559 true, VAR_DOMAIN
, LOC_TYPEDEF
, -1,
2560 psymbol_placement::STATIC
,
2561 unrelocated_addr (0),
2563 partial_symtabs
, objfile
);
2566 /* If this is an enumerated type, we need to
2567 add all the enum constants to the partial symbol
2568 table. This does not cover enums without names, e.g.
2569 "enum {a, b} c;" in C, but fortunately those are
2570 rare. There is no way for GDB to find those from the
2571 enum type without spending too much time on it. Thus
2572 to solve this problem, the compiler needs to put out the
2573 enum in a nameless type. GCC2 does this. */
2575 /* We are looking for something of the form
2576 <name> ":" ("t" | "T") [<number> "="] "e"
2577 {<constant> ":" <value> ","} ";". */
2579 /* Skip over the colon and the 't' or 'T'. */
2581 /* This type may be given a number. Also, numbers can come
2582 in pairs like (0,26). Skip over it. */
2583 while ((*p
>= '0' && *p
<= '9')
2584 || *p
== '(' || *p
== ',' || *p
== ')'
2590 /* The aix4 compiler emits extra crud before the
2594 /* Skip over the type (?). */
2598 /* Skip over the colon. */
2602 /* We have found an enumerated type. */
2603 /* According to comments in read_enum_type
2604 a comma could end it instead of a semicolon.
2605 I don't know where that happens.
2607 while (*p
&& *p
!= ';' && *p
!= ',')
2611 /* Check for and handle cretinous dbx symbol name
2613 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
2614 p
= next_symbol_text (objfile
);
2616 /* Point to the character after the name
2617 of the enum constant. */
2618 for (q
= p
; *q
&& *q
!= ':'; q
++)
2620 /* Note that the value doesn't matter for
2621 enum constants in psymtabs, just in symtabs. */
2622 pst
->add_psymbol (gdb::string_view (p
, q
- p
), true,
2623 VAR_DOMAIN
, LOC_CONST
, -1,
2624 psymbol_placement::STATIC
,
2625 unrelocated_addr (0),
2627 partial_symtabs
, objfile
);
2628 /* Point past the name. */
2630 /* Skip over the value. */
2631 while (*p
&& *p
!= ',')
2633 /* Advance past the comma. */
2641 /* Constant, e.g. from "const" in Pascal. */
2642 pst
->add_psymbol (gdb::string_view (namestring
,
2644 true, VAR_DOMAIN
, LOC_CONST
, -1,
2645 psymbol_placement::STATIC
,
2646 unrelocated_addr (0),
2648 partial_symtabs
, objfile
);
2654 std::string
name (namestring
, (p
- namestring
));
2655 function_outside_compilation_unit_complaint (name
.c_str ());
2657 pst
->add_psymbol (gdb::string_view (namestring
,
2659 true, VAR_DOMAIN
, LOC_BLOCK
,
2660 SECT_OFF_TEXT (objfile
),
2661 psymbol_placement::STATIC
,
2662 unrelocated_addr (symbol
.n_value
),
2664 partial_symtabs
, objfile
);
2667 /* Global functions were ignored here, but now they
2668 are put into the global psymtab like one would expect.
2669 They're also in the minimal symbol table. */
2673 std::string
name (namestring
, (p
- namestring
));
2674 function_outside_compilation_unit_complaint (name
.c_str ());
2677 /* We need only the minimal symbols for these
2678 loader-generated definitions. Keeping the global
2679 symbols leads to "in psymbols but not in symbols"
2681 if (startswith (namestring
, "@FIX"))
2684 pst
->add_psymbol (gdb::string_view (namestring
,
2686 true, VAR_DOMAIN
, LOC_BLOCK
,
2687 SECT_OFF_TEXT (objfile
),
2688 psymbol_placement::GLOBAL
,
2689 unrelocated_addr (symbol
.n_value
),
2691 partial_symtabs
, objfile
);
2694 /* Two things show up here (hopefully); static symbols of
2695 local scope (static used inside braces) or extensions
2696 of structure symbols. We can ignore both. */
2710 case '#': /* For symbol identification (used in
2715 /* It is a C++ nested symbol. We don't need to record it
2716 (I don't think); if we try to look up foo::bar::baz,
2717 then symbols for the symtab containing foo should get
2718 read in, I think. */
2719 /* Someone says sun cc puts out symbols like
2720 /foo/baz/maclib::/usr/local/bin/maclib,
2721 which would get here with a symbol type of ':'. */
2725 /* Unexpected symbol descriptor. The second and
2726 subsequent stabs of a continued stab can show up
2727 here. The question is whether they ever can mimic
2728 a normal stab--it would be nice if not, since we
2729 certainly don't want to spend the time searching to
2730 the end of every string looking for a
2733 complaint (_("unknown symbol descriptor `%c'"), p
[1]);
2735 /* Ignore it; perhaps it is an extension that we don't
2745 xcoff_end_psymtab (objfile
, partial_symtabs
,
2746 pst
, psymtab_include_list
, includes_used
,
2747 ssymnum
, dependency_list
,
2748 dependencies_used
, textlow_not_set
);
2751 /* Record the toc offset value of this symbol table into objfile
2752 structure. If no XMC_TC0 is found, toc_offset should be zero.
2753 Another place to obtain this information would be file auxiliary
2756 XCOFF_DATA (objfile
)->toc_offset
= toc_offset
;
2759 /* Return the toc offset value for a given objfile. */
2762 xcoff_get_toc_offset (struct objfile
*objfile
)
2765 return XCOFF_DATA (objfile
)->toc_offset
;
2769 /* Scan and build partial symbols for a symbol file.
2770 We have been initialized by a call to dbx_symfile_init, which
2771 put all the relevant info into a "struct dbx_symfile_info",
2772 hung off the objfile structure.
2774 SECTION_OFFSETS contains offsets relative to which the symbols in the
2775 various sections are (depending where the sections were actually
2779 xcoff_initial_scan (struct objfile
*objfile
, symfile_add_flags symfile_flags
)
2783 int num_symbols
; /* # of symbols */
2784 file_ptr symtab_offset
; /* symbol table and */
2785 file_ptr stringtab_offset
; /* string table file offsets */
2786 struct xcoff_symfile_info
*info
;
2790 info
= XCOFF_DATA (objfile
);
2791 symfile_bfd
= abfd
= objfile
->obfd
.get ();
2792 name
= objfile_name (objfile
);
2794 num_symbols
= bfd_get_symcount (abfd
); /* # of symbols */
2795 symtab_offset
= obj_sym_filepos (abfd
); /* symbol table file offset */
2796 stringtab_offset
= symtab_offset
+
2797 num_symbols
* coff_data (abfd
)->local_symesz
;
2799 info
->min_lineno_offset
= 0;
2800 info
->max_lineno_offset
= 0;
2801 bfd_map_over_sections (abfd
, find_linenos
, info
);
2803 if (num_symbols
> 0)
2805 /* Read the string table. */
2806 init_stringtab (abfd
, stringtab_offset
, objfile
);
2808 /* Read the .debug section, if present and if we're not ignoring
2810 if (!(objfile
->flags
& OBJF_READNEVER
))
2812 struct bfd_section
*secp
;
2813 bfd_size_type length
;
2814 bfd_byte
*debugsec
= NULL
;
2816 secp
= bfd_get_section_by_name (abfd
, ".debug");
2819 length
= bfd_section_size (secp
);
2823 = (bfd_byte
*) obstack_alloc (&objfile
->objfile_obstack
,
2826 if (!bfd_get_full_section_contents (abfd
, secp
, &debugsec
))
2828 error (_("Error reading .debug section of `%s': %s"),
2829 name
, bfd_errmsg (bfd_get_error ()));
2833 info
->debugsec
= (char *) debugsec
;
2837 /* Read the symbols. We keep them in core because we will want to
2838 access them randomly in read_symbol*. */
2839 val
= bfd_seek (abfd
, symtab_offset
, SEEK_SET
);
2841 error (_("Error reading symbols from %s: %s"),
2842 name
, bfd_errmsg (bfd_get_error ()));
2843 size
= coff_data (abfd
)->local_symesz
* num_symbols
;
2844 info
->symtbl
= (char *) obstack_alloc (&objfile
->objfile_obstack
, size
);
2845 info
->symtbl_num_syms
= num_symbols
;
2847 val
= bfd_bread (info
->symtbl
, size
, abfd
);
2849 perror_with_name (_("reading symbol table"));
2851 scoped_free_pendings free_pending
;
2852 minimal_symbol_reader
reader (objfile
);
2854 /* Now that the symbol table data of the executable file are all in core,
2855 process them and define symbols accordingly. */
2857 psymbol_functions
*psf
= new psymbol_functions ();
2858 psymtab_storage
*partial_symtabs
= psf
->get_partial_symtabs ().get ();
2859 objfile
->qf
.emplace_front (psf
);
2860 scan_xcoff_symtab (reader
, partial_symtabs
, objfile
);
2862 /* Install any minimal symbols that have been collected as the current
2863 minimal symbols for this objfile. */
2867 /* DWARF2 sections. */
2869 if (dwarf2_has_info (objfile
, &dwarf2_xcoff_names
))
2870 dwarf2_initialize_objfile (objfile
);
2874 xcoff_symfile_offsets (struct objfile
*objfile
,
2875 const section_addr_info
&addrs
)
2877 const char *first_section_name
;
2879 default_symfile_offsets (objfile
, addrs
);
2881 /* Oneof the weird side-effects of default_symfile_offsets is that
2882 it sometimes sets some section indices to zero for sections that,
2883 in fact do not exist. See the body of default_symfile_offsets
2884 for more info on when that happens. Undo that, as this then allows
2885 us to test whether the associated section exists or not, and then
2886 access it quickly (without searching it again). */
2888 if (objfile
->section_offsets
.empty ())
2889 return; /* Is that even possible? Better safe than sorry. */
2891 first_section_name
= bfd_section_name (objfile
->sections
[0].the_bfd_section
);
2893 if (objfile
->sect_index_text
== 0
2894 && strcmp (first_section_name
, ".text") != 0)
2895 objfile
->sect_index_text
= -1;
2897 if (objfile
->sect_index_data
== 0
2898 && strcmp (first_section_name
, ".data") != 0)
2899 objfile
->sect_index_data
= -1;
2901 if (objfile
->sect_index_bss
== 0
2902 && strcmp (first_section_name
, ".bss") != 0)
2903 objfile
->sect_index_bss
= -1;
2905 if (objfile
->sect_index_rodata
== 0
2906 && strcmp (first_section_name
, ".rodata") != 0)
2907 objfile
->sect_index_rodata
= -1;
2910 /* Register our ability to parse symbols for xcoff BFD files. */
2912 static const struct sym_fns xcoff_sym_fns
=
2915 /* It is possible that coff and xcoff should be merged as
2916 they do have fundamental similarities (for example, the extra storage
2917 classes used for stabs could presumably be recognized in any COFF file).
2918 However, in addition to obvious things like all the csect hair, there are
2919 some subtler differences between xcoffread.c and coffread.c, notably
2920 the fact that coffread.c has no need to read in all the symbols, but
2921 xcoffread.c reads all the symbols and does in fact randomly access them
2922 (in C_BSTAT and line number processing). */
2924 xcoff_new_init
, /* init anything gbl to entire symtab */
2925 xcoff_symfile_init
, /* read initial info, setup for sym_read() */
2926 xcoff_initial_scan
, /* read a symbol file into symtab */
2927 xcoff_symfile_finish
, /* finished with file, cleanup */
2928 xcoff_symfile_offsets
, /* xlate offsets ext->int form */
2929 default_symfile_segments
, /* Get segment information from a file. */
2930 aix_process_linenos
,
2931 default_symfile_relocate
, /* Relocate a debug section. */
2932 NULL
, /* sym_probe_fns */
2935 /* Same as xcoff_get_n_import_files, but for core files. */
2938 xcoff_get_core_n_import_files (bfd
*abfd
)
2940 asection
*sect
= bfd_get_section_by_name (abfd
, ".ldinfo");
2942 file_ptr offset
= 0;
2946 return -1; /* Not a core file. */
2948 for (offset
= 0; offset
< bfd_section_size (sect
);)
2954 if (!bfd_get_section_contents (abfd
, sect
, buf
, offset
, 4))
2956 next
= bfd_get_32 (abfd
, buf
);
2958 break; /* This is the last entry. */
2962 /* Return the number of entries, excluding the first one, which is
2963 the path to the executable that produced this core file. */
2964 return n_entries
- 1;
2967 /* Return the number of import files (shared libraries) that the given
2968 BFD depends on. Return -1 if this number could not be computed. */
2971 xcoff_get_n_import_files (bfd
*abfd
)
2973 asection
*sect
= bfd_get_section_by_name (abfd
, ".loader");
2977 /* If the ".loader" section does not exist, the objfile is probably
2978 not an executable. Might be a core file... */
2980 return xcoff_get_core_n_import_files (abfd
);
2982 /* The number of entries in the Import Files Table is stored in
2983 field l_nimpid. This field is always at offset 16, and is
2984 always 4 bytes long. Read those 4 bytes. */
2986 if (!bfd_get_section_contents (abfd
, sect
, buf
, 16, 4))
2988 l_nimpid
= bfd_get_32 (abfd
, buf
);
2990 /* By convention, the first entry is the default LIBPATH value
2991 to be used by the system loader, so it does not count towards
2992 the number of import files. */
2993 return l_nimpid
- 1;
2996 void _initialize_xcoffread ();
2998 _initialize_xcoffread ()
3000 add_symtab_fns (bfd_target_xcoff_flavour
, &xcoff_sym_fns
);