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"
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_unrelocated_pc (old_linetable
[ii
].unrelocated_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
].unrelocated_pc ()
461 != old_linetable
[jj
+ 1].unrelocated_pc ()))
463 new_linetable
.push_back (old_linetable
[jj
]);
464 new_linetable
.back ().line
= old_linetable
[jj
+ 1].line
;
467 for (jj
= entry
.line
+ 1;
468 jj
< old_linetable
.size () && old_linetable
[jj
].line
!= 0;
470 new_linetable
.push_back (old_linetable
[jj
]);
473 new_linetable
.shrink_to_fit ();
474 old_linetable
= std::move (new_linetable
);
477 /* include file support: C_BINCL/C_EINCL pairs will be kept in the
478 following `IncludeChain'. At the end of each symtab (end_compunit_symtab),
479 we will determine if we should create additional symtab's to
480 represent if (the include files. */
483 typedef struct _inclTable
485 char *name
; /* include filename */
487 /* Offsets to the line table. end points to the last entry which is
488 part of this include file. */
491 struct subfile
*subfile
;
492 unsigned funStartLine
; /* Start line # of its function. */
496 #define INITIAL_INCLUDE_TABLE_LENGTH 20
497 static InclTable
*inclTable
; /* global include table */
498 static int inclIndx
; /* last entry to table */
499 static int inclLength
; /* table length */
500 static int inclDepth
; /* nested include depth */
502 /* subfile structure for the main compilation unit. */
503 static subfile
*main_subfile
;
505 static void allocate_include_entry (void);
508 record_include_begin (struct xcoff_symbol
*cs
)
512 /* In xcoff, we assume include files cannot be nested (not in .c files
513 of course, but in corresponding .s files.). */
515 /* This can happen with old versions of GCC.
516 GCC 2.3.3-930426 does not exhibit this on a test case which
517 a user said produced the message for him. */
518 complaint (_("Nested C_BINCL symbols"));
522 allocate_include_entry ();
524 inclTable
[inclIndx
].name
= cs
->c_name
;
525 inclTable
[inclIndx
].begin
= cs
->c_value
;
529 record_include_end (struct xcoff_symbol
*cs
)
535 complaint (_("Mismatched C_BINCL/C_EINCL pair"));
538 allocate_include_entry ();
540 pTbl
= &inclTable
[inclIndx
];
541 pTbl
->end
= cs
->c_value
;
548 allocate_include_entry (void)
550 if (inclTable
== NULL
)
552 inclTable
= XCNEWVEC (InclTable
, INITIAL_INCLUDE_TABLE_LENGTH
);
553 inclLength
= INITIAL_INCLUDE_TABLE_LENGTH
;
555 main_subfile
= new subfile
;
557 else if (inclIndx
>= inclLength
)
559 inclLength
+= INITIAL_INCLUDE_TABLE_LENGTH
;
560 inclTable
= XRESIZEVEC (InclTable
, inclTable
, inclLength
);
561 memset (inclTable
+ inclLength
- INITIAL_INCLUDE_TABLE_LENGTH
,
562 '\0', sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
566 /* Global variable to pass the psymtab down to all the routines involved
567 in psymtab to symtab processing. */
568 static legacy_psymtab
*this_symtab_psymtab
;
570 /* Objfile related to this_symtab_psymtab; set at the same time. */
571 static struct objfile
*this_symtab_objfile
;
573 /* given the start and end addresses of a compilation unit (or a csect,
574 at times) process its lines and create appropriate line vectors. */
577 process_linenos (CORE_ADDR start
, CORE_ADDR end
)
581 = XCOFF_DATA (this_symtab_objfile
)->max_lineno_offset
;
583 /* In the main source file, any time we see a function entry, we
584 reset this variable to function's absolute starting line number.
585 All the following line numbers in the function are relative to
586 this, and we record absolute line numbers in record_line(). */
588 unsigned int main_source_baseline
= 0;
593 ((struct xcoff_symloc
*) this_symtab_psymtab
->read_symtab_private
)->lineno_off
;
595 goto return_after_cleanup
;
598 /* All source lines were in the main source file. None in include
601 enter_line_range (main_subfile
, offset
, 0, start
, end
,
602 &main_source_baseline
);
606 /* There was source with line numbers in include files. */
609 coff_data (this_symtab_objfile
->obfd
)->local_linesz
;
610 main_source_baseline
= 0;
612 for (int ii
= 0; ii
< inclIndx
; ++ii
)
614 /* If there is main file source before include file, enter it. */
615 if (offset
< inclTable
[ii
].begin
)
618 (main_subfile
, offset
, inclTable
[ii
].begin
- linesz
,
619 start
, 0, &main_source_baseline
);
622 if (strcmp (inclTable
[ii
].name
, get_last_source_file ()) == 0)
624 /* The entry in the include table refers to the main source
625 file. Add the lines to the main subfile. */
627 main_source_baseline
= inclTable
[ii
].funStartLine
;
629 (main_subfile
, inclTable
[ii
].begin
, inclTable
[ii
].end
,
630 start
, 0, &main_source_baseline
);
631 inclTable
[ii
].subfile
= main_subfile
;
635 /* Have a new subfile for the include file. */
636 inclTable
[ii
].subfile
= new subfile
;
638 firstLine
= &(inclTable
[ii
].funStartLine
);
640 /* Enter include file's lines now. */
641 enter_line_range (inclTable
[ii
].subfile
, inclTable
[ii
].begin
,
642 inclTable
[ii
].end
, start
, 0, firstLine
);
645 if (offset
<= inclTable
[ii
].end
)
646 offset
= inclTable
[ii
].end
+ linesz
;
649 /* All the include files' line have been processed at this point. Now,
650 enter remaining lines of the main file, if any left. */
651 if (offset
< max_offset
+ 1 - linesz
)
653 enter_line_range (main_subfile
, offset
, 0, start
, end
,
654 &main_source_baseline
);
658 /* Process main file's line numbers. */
659 if (!main_subfile
->line_vector_entries
.empty ())
661 /* Line numbers are not necessarily ordered. xlc compilation will
662 put static function to the end. */
663 arrange_linetable (main_subfile
->line_vector_entries
);
666 /* Now, process included files' line numbers. */
668 for (int ii
= 0; ii
< inclIndx
; ++ii
)
670 if (inclTable
[ii
].subfile
!= main_subfile
671 && !inclTable
[ii
].subfile
->line_vector_entries
.empty ())
673 /* Line numbers are not necessarily ordered. xlc compilation will
674 put static function to the end. */
675 arrange_linetable (inclTable
[ii
].subfile
->line_vector_entries
);
679 /* For the same include file, we might want to have more than one
680 subfile. This happens if we have something like:
688 while foo.h including code in it. (stupid but possible)
689 Since start_subfile() looks at the name and uses an
690 existing one if finds, we need to provide a fake name and
694 start_subfile (inclTable
[ii
].name
);
697 /* Pick a fake name that will produce the same results as this
698 one when passed to deduce_language_from_filename. Kludge on
700 const char *fakename
= strrchr (inclTable
[ii
].name
, '.');
702 if (fakename
== NULL
)
704 start_subfile (fakename
);
706 struct subfile
*current_subfile
= get_current_subfile ();
707 current_subfile
->name
= inclTable
[ii
].name
;
708 current_subfile
->name_for_id
= inclTable
[ii
].name
;
711 start_subfile (pop_subfile ());
715 return_after_cleanup
:
717 /* We don't want to keep alloc/free'ing the global include file table. */
722 aix_process_linenos (struct objfile
*objfile
)
724 /* There is no linenos to read if there are only dwarf info. */
725 if (this_symtab_psymtab
== NULL
)
728 /* Process line numbers and enter them into line vector. */
729 process_linenos (get_last_source_start_addr (), cur_src_end_addr
);
733 /* Enter a given range of lines into the line vector.
734 can be called in the following two ways:
735 enter_line_range (subfile, beginoffset, endoffset,
736 startaddr, 0, firstLine) or
737 enter_line_range (subfile, beginoffset, 0,
738 startaddr, endaddr, firstLine)
740 endoffset points to the last line table entry that we should pay
744 enter_line_range (struct subfile
*subfile
, unsigned beginoffset
,
745 unsigned endoffset
, /* offsets to line table */
746 CORE_ADDR startaddr
, /* offsets to line table */
747 CORE_ADDR endaddr
, unsigned *firstLine
)
749 struct objfile
*objfile
= this_symtab_objfile
;
750 struct gdbarch
*gdbarch
= objfile
->arch ();
751 unsigned int curoffset
;
754 struct internal_lineno int_lnno
;
755 unsigned int limit_offset
;
759 if (endoffset
== 0 && startaddr
== 0 && endaddr
== 0)
761 curoffset
= beginoffset
;
762 limit_offset
= XCOFF_DATA (objfile
)->max_lineno_offset
;
766 if (endoffset
>= limit_offset
)
768 complaint (_("Bad line table offset in C_EINCL directive"));
771 limit_offset
= endoffset
;
776 abfd
= objfile
->obfd
.get ();
777 linesz
= coff_data (abfd
)->local_linesz
;
778 ext_lnno
= alloca (linesz
);
780 while (curoffset
<= limit_offset
)
782 if (bfd_seek (abfd
, curoffset
, SEEK_SET
) != 0
783 || bfd_read (ext_lnno
, linesz
, abfd
) != linesz
)
785 bfd_coff_swap_lineno_in (abfd
, ext_lnno
, &int_lnno
);
787 /* Find the address this line represents. */
788 addr
= (int_lnno
.l_lnno
789 ? int_lnno
.l_addr
.l_paddr
790 : read_symbol_nvalue (int_lnno
.l_addr
.l_symndx
));
791 addr
+= objfile
->text_section_offset ();
793 if (addr
< startaddr
|| (endaddr
&& addr
>= endaddr
))
796 CORE_ADDR record_addr
= (gdbarch_addr_bits_remove (gdbarch
, addr
)
797 - objfile
->text_section_offset ());
798 if (int_lnno
.l_lnno
== 0)
800 *firstLine
= read_symbol_lineno (int_lnno
.l_addr
.l_symndx
);
801 record_line (subfile
, 0, unrelocated_addr (record_addr
));
805 record_line (subfile
, *firstLine
+ int_lnno
.l_lnno
,
806 unrelocated_addr (record_addr
));
812 /* Save the vital information for use when closing off the current file.
813 NAME is the file name the symbols came from, START_ADDR is the first
814 text address for the file, and SIZE is the number of bytes of text. */
816 #define complete_symtab(name, start_addr) { \
817 set_last_source_file (name); \
818 set_last_source_start_addr (start_addr); \
822 /* Refill the symbol table input buffer
823 and set the variables that control fetching entries from it.
824 Reports an error if no data available.
825 This function can read past the end of the symbol table
826 (into the string table) but this does no harm. */
828 /* Create a new minimal symbol (using record_with_info).
830 Creation of all new minimal symbols should go through this function
831 rather than calling the various record functions in order
832 to make sure that all symbol addresses get properly relocated.
836 NAME - the symbol's name (but if NAME starts with a period, that
837 leading period is discarded).
838 ADDRESS - the symbol's address, prior to relocation. This function
839 relocates the address before recording the minimal symbol.
840 MS_TYPE - the symbol's type.
841 N_SCNUM - the symbol's XCOFF section number.
842 OBJFILE - the objfile associated with the minimal symbol. */
845 record_minimal_symbol (minimal_symbol_reader
&reader
,
846 const char *name
, unrelocated_addr address
,
847 enum minimal_symbol_type ms_type
,
849 struct objfile
*objfile
)
854 reader
.record_with_info (name
, address
, ms_type
,
855 secnum_to_section (n_scnum
, objfile
));
858 /* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be
859 nested. At any given time, a symbol can only be in one static block.
860 This is the base address of current static block, zero if non exists. */
862 static int static_block_base
= 0;
864 /* Section number for the current static block. */
866 static int static_block_section
= -1;
868 /* true if space for symbol name has been allocated. */
870 static int symname_alloced
= 0;
872 /* Next symbol to read. Pointer into raw seething symbol table. */
874 static char *raw_symbol
;
876 /* This is the function which stabsread.c calls to get symbol
880 xcoff_next_symbol_text (struct objfile
*objfile
)
882 struct internal_syment symbol
;
885 /* FIXME: is this the same as the passed arg? */
886 if (this_symtab_objfile
)
887 objfile
= this_symtab_objfile
;
889 bfd_coff_swap_sym_in (objfile
->obfd
.get (), raw_symbol
, &symbol
);
892 complaint (_("Unexpected symbol continuation"));
894 /* Return something which points to '\0' and hope the symbol reading
895 code does something reasonable. */
898 else if (symbol
.n_sclass
& 0x80)
900 retval
= XCOFF_DATA (objfile
)->debugsec
+ symbol
.n_offset
;
901 raw_symbol
+= coff_data (objfile
->obfd
)->local_symesz
;
906 complaint (_("Unexpected symbol continuation"));
908 /* Return something which points to '\0' and hope the symbol reading
909 code does something reasonable. */
915 /* Read symbols for a given partial symbol table. */
918 read_xcoff_symtab (struct objfile
*objfile
, legacy_psymtab
*pst
)
920 bfd
*abfd
= objfile
->obfd
.get ();
921 char *raw_auxptr
; /* Pointer to first raw aux entry for sym. */
922 struct xcoff_symfile_info
*xcoff
= XCOFF_DATA (objfile
);
923 char *strtbl
= xcoff
->strtbl
;
924 char *debugsec
= xcoff
->debugsec
;
925 const char *debugfmt
= bfd_xcoff_is_xcoff64 (abfd
) ? "XCOFF64" : "XCOFF";
927 struct internal_syment symbol
[1];
928 union internal_auxent main_aux
;
929 struct xcoff_symbol cs
[1];
930 CORE_ADDR file_start_addr
= 0;
931 CORE_ADDR file_end_addr
= 0;
933 int next_file_symnum
= -1;
934 unsigned int max_symnum
;
935 int just_started
= 1;
937 CORE_ADDR fcn_start_addr
= 0;
938 enum language pst_symtab_language
;
940 struct xcoff_symbol fcn_stab_saved
= { 0 };
942 /* fcn_cs_saved is global because process_xcoff_symbol needs it. */
943 union internal_auxent fcn_aux_saved
{};
944 struct context_stack
*newobj
;
946 const char *filestring
= pst
->filename
; /* Name of the current file. */
948 const char *last_csect_name
; /* Last seen csect's name. */
950 this_symtab_psymtab
= pst
;
951 this_symtab_objfile
= objfile
;
953 /* Get the appropriate COFF "constants" related to the file we're
955 local_symesz
= coff_data (abfd
)->local_symesz
;
957 set_last_source_file (NULL
);
959 pst_symtab_language
= deduce_language_from_filename (filestring
);
962 start_compunit_symtab (objfile
, filestring
, NULL
, file_start_addr
,
963 pst_symtab_language
);
964 record_debugformat (debugfmt
);
965 symnum
= ((struct xcoff_symloc
*) pst
->read_symtab_private
)->first_symnum
;
967 symnum
+ ((struct xcoff_symloc
*) pst
->read_symtab_private
)->numsyms
;
968 first_object_file_end
= 0;
970 raw_symbol
= xcoff
->symtbl
+ symnum
* local_symesz
;
972 while (symnum
< max_symnum
)
974 QUIT
; /* make this command interruptable. */
976 /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */
977 /* read one symbol into `cs' structure. After processing the
978 whole symbol table, only string table will be kept in memory,
979 symbol table and debug section of xcoff will be freed. Thus
980 we can mark symbols with names in string table as
985 /* Swap and align the symbol into a reasonable C structure. */
986 bfd_coff_swap_sym_in (abfd
, raw_symbol
, symbol
);
988 cs
->c_symnum
= symnum
;
989 cs
->c_naux
= symbol
->n_numaux
;
990 if (symbol
->n_zeroes
)
993 /* We must use the original, unswapped, name here so the name field
994 pointed to by cs->c_name will persist throughout xcoffread. If
995 we use the new field, it gets overwritten for each symbol. */
996 cs
->c_name
= ((struct external_syment
*) raw_symbol
)->e
.e_name
;
997 /* If it's exactly E_SYMNMLEN characters long it isn't
999 if (cs
->c_name
[E_SYMNMLEN
- 1] != '\0')
1003 p
= (char *) obstack_alloc (&objfile
->objfile_obstack
,
1005 strncpy (p
, cs
->c_name
, E_SYMNMLEN
);
1006 p
[E_SYMNMLEN
] = '\0';
1008 symname_alloced
= 1;
1011 else if (symbol
->n_sclass
& 0x80)
1013 cs
->c_name
= debugsec
+ symbol
->n_offset
;
1014 symname_alloced
= 0;
1018 /* in string table */
1019 cs
->c_name
= strtbl
+ (int) symbol
->n_offset
;
1020 symname_alloced
= 1;
1022 cs
->c_value
= symbol
->n_value
;
1023 cs
->c_sclass
= symbol
->n_sclass
;
1024 cs
->c_secnum
= symbol
->n_scnum
;
1025 cs
->c_type
= (unsigned) symbol
->n_type
;
1027 raw_symbol
+= local_symesz
;
1030 /* Save addr of first aux entry. */
1031 raw_auxptr
= raw_symbol
;
1033 /* Skip all the auxents associated with this symbol. */
1034 for (ii
= symbol
->n_numaux
; ii
; --ii
)
1036 raw_symbol
+= coff_data (abfd
)->local_auxesz
;
1041 /* if symbol name starts with ".$" or "$", ignore it. */
1042 if (cs
->c_name
[0] == '$'
1043 || (cs
->c_name
[1] == '$' && cs
->c_name
[0] == '.'))
1046 if (cs
->c_symnum
== next_file_symnum
&& cs
->c_sclass
!= C_FILE
)
1048 if (get_last_source_file ())
1050 pst
->compunit_symtab
= end_compunit_symtab (cur_src_end_addr
);
1055 start_compunit_symtab (objfile
, "_globals_", NULL
,
1056 0, pst_symtab_language
);
1057 record_debugformat (debugfmt
);
1058 cur_src_end_addr
= first_object_file_end
;
1059 /* Done with all files, everything from here on is globals. */
1062 if (cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_HIDEXT
||
1063 cs
->c_sclass
== C_WEAKEXT
)
1065 /* Dealing with a symbol with a csect entry. */
1067 #define CSECT(PP) ((PP)->x_csect)
1068 #define CSECT_LEN(PP) (CSECT(PP).x_scnlen.u64)
1069 #define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp))
1070 #define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp))
1071 #define CSECT_SCLAS(PP) (CSECT(PP).x_smclas)
1073 /* Convert the auxent to something we can access.
1074 XCOFF can have more than one auxiliary entries.
1076 Actual functions will have two auxiliary entries, one to have the
1077 function size and other to have the smtype/smclass (LD/PR).
1079 c_type value of main symbol table will be set only in case of
1080 C_EXT/C_HIDEEXT/C_WEAKEXT storage class symbols.
1081 Bit 10 of type is set if symbol is a function, ie the value is set
1082 to 32(0x20). So we need to read the first function auxiliary entry
1083 which contains the size. */
1084 if (cs
->c_naux
> 1 && ISFCN (cs
->c_type
))
1086 /* a function entry point. */
1088 fcn_start_addr
= cs
->c_value
;
1090 /* save the function header info, which will be used
1091 when `.bf' is seen. */
1094 /* Convert the auxent to something we can access. */
1095 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1096 0, cs
->c_naux
, &fcn_aux_saved
);
1099 /* Read the csect auxiliary header, which is always the last by
1101 bfd_coff_swap_aux_in (abfd
,
1103 + ((coff_data (abfd
)->local_symesz
)
1104 * (cs
->c_naux
- 1)),
1105 cs
->c_type
, cs
->c_sclass
,
1106 cs
->c_naux
- 1, cs
->c_naux
,
1109 switch (CSECT_SMTYP (&main_aux
))
1113 /* Ignore all external references. */
1117 /* A section description. */
1119 switch (CSECT_SCLAS (&main_aux
))
1125 /* A program csect is seen. We have to allocate one
1126 symbol table for each program csect. Normally gdb
1127 prefers one symtab for each source file. In case
1128 of AIX, one source file might include more than one
1129 [PR] csect, and they don't have to be adjacent in
1130 terms of the space they occupy in memory. Thus, one
1131 single source file might get fragmented in the
1132 memory and gdb's file start and end address
1133 approach does not work! GCC (and I think xlc) seem
1134 to put all the code in the unnamed program csect. */
1136 if (last_csect_name
)
1138 complete_symtab (filestring
, file_start_addr
);
1139 cur_src_end_addr
= file_end_addr
;
1140 end_compunit_symtab (file_end_addr
);
1143 /* Give all csects for this source file the same
1145 start_compunit_symtab (objfile
, filestring
, NULL
,
1146 0, pst_symtab_language
);
1147 record_debugformat (debugfmt
);
1150 /* If this is the very first csect seen,
1151 basically `__start'. */
1154 first_object_file_end
1155 = cs
->c_value
+ CSECT_LEN (&main_aux
);
1160 cs
->c_value
+ objfile
->text_section_offset ();
1161 file_end_addr
= file_start_addr
+ CSECT_LEN (&main_aux
);
1163 if (cs
->c_name
&& (cs
->c_name
[0] == '.' || cs
->c_name
[0] == '@'))
1164 last_csect_name
= cs
->c_name
;
1168 /* All other symbols are put into the minimal symbol
1181 /* Ignore the symbol. */
1189 switch (CSECT_SCLAS (&main_aux
))
1191 /* We never really come to this part as this case has been
1192 handled in ISFCN check above.
1193 This and other cases of XTY_LD are kept just for
1199 /* shared library function trampoline code entry point. */
1203 /* The symbols often have the same names as debug symbols for
1204 functions, and confuse lookup_symbol. */
1208 /* xlc puts each variable in a separate csect, so we get
1209 an XTY_SD for each variable. But gcc puts several
1210 variables in a csect, so that each variable only gets
1211 an XTY_LD. This will typically be XMC_RW; I suspect
1212 XMC_RO and XMC_BS might be possible too.
1213 These variables are put in the minimal symbol table
1220 /* Common symbols are put into the minimal symbol table only. */
1228 switch (cs
->c_sclass
)
1232 /* c_value field contains symnum of next .file entry in table
1233 or symnum of first global after last .file. */
1235 next_file_symnum
= cs
->c_value
;
1237 /* Complete symbol table for last object file containing
1238 debugging information. */
1240 /* Whether or not there was a csect in the previous file, we
1241 have to call `end_stabs' and `start_stabs' to reset
1242 type_vector, line_vector, etc. structures. */
1244 complete_symtab (filestring
, file_start_addr
);
1245 cur_src_end_addr
= file_end_addr
;
1246 end_compunit_symtab (file_end_addr
);
1249 /* XCOFF, according to the AIX 3.2 documentation, puts the
1250 filename in cs->c_name. But xlc 1.3.0.2 has decided to
1251 do things the standard COFF way and put it in the auxent.
1252 We use the auxent if the symbol is ".file" and an auxent
1253 exists, otherwise use the symbol itself. Simple
1255 if (!strcmp (cs
->c_name
, ".file") && cs
->c_naux
> 0)
1257 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1258 0, cs
->c_naux
, &main_aux
);
1259 filestring
= coff_getfilename (&main_aux
, objfile
);
1262 filestring
= cs
->c_name
;
1265 start_compunit_symtab (objfile
, filestring
, NULL
, 0,
1266 pst_symtab_language
);
1267 record_debugformat (debugfmt
);
1268 last_csect_name
= 0;
1270 /* reset file start and end addresses. A compilation unit
1271 with no text (only data) should have zero file
1273 file_start_addr
= file_end_addr
= 0;
1277 fcn_stab_saved
= *cs
;
1281 if (strcmp (cs
->c_name
, ".bf") == 0)
1283 CORE_ADDR off
= objfile
->text_section_offset ();
1285 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1286 0, cs
->c_naux
, &main_aux
);
1288 within_function
= 1;
1290 newobj
= push_context (0, fcn_start_addr
+ off
);
1292 newobj
->name
= define_symbol
1293 (fcn_cs_saved
.c_value
+ off
,
1294 fcn_stab_saved
.c_name
, 0, 0, objfile
);
1295 if (newobj
->name
!= NULL
)
1296 newobj
->name
->set_section_index (SECT_OFF_TEXT (objfile
));
1298 else if (strcmp (cs
->c_name
, ".ef") == 0)
1300 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1301 0, cs
->c_naux
, &main_aux
);
1303 /* The value of .ef is the address of epilogue code;
1304 not useful for gdb. */
1305 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1306 contains number of lines to '}' */
1308 if (outermost_context_p ())
1309 { /* We attempted to pop an empty context stack. */
1310 ef_complaint (cs
->c_symnum
);
1311 within_function
= 0;
1314 struct context_stack cstk
= pop_context ();
1315 /* Stack must be empty now. */
1316 if (!outermost_context_p ())
1318 ef_complaint (cs
->c_symnum
);
1319 within_function
= 0;
1323 finish_block (cstk
.name
, cstk
.old_blocks
,
1324 NULL
, cstk
.start_addr
,
1325 (fcn_cs_saved
.c_value
1326 + fcn_aux_saved
.x_sym
.x_misc
.x_fsize
1327 + objfile
->text_section_offset ()));
1328 within_function
= 0;
1333 /* Begin static block. */
1335 struct internal_syment static_symbol
;
1337 read_symbol (&static_symbol
, cs
->c_value
);
1338 static_block_base
= static_symbol
.n_value
;
1339 static_block_section
=
1340 secnum_to_section (static_symbol
.n_scnum
, objfile
);
1345 /* End of static block. */
1346 static_block_base
= 0;
1347 static_block_section
= -1;
1358 complaint (_("Unrecognized storage class %d."),
1373 /* beginning of include file */
1374 /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted
1375 order. Thus, when wee see them, we might not know enough info
1376 to process them. Thus, we'll be saving them into a table
1377 (inclTable) and postpone their processing. */
1379 record_include_begin (cs
);
1383 /* End of include file. */
1384 /* See the comment after case C_BINCL. */
1385 record_include_end (cs
);
1389 if (strcmp (cs
->c_name
, ".bb") == 0)
1392 newobj
= push_context (depth
,
1394 + objfile
->text_section_offset ()));
1396 else if (strcmp (cs
->c_name
, ".eb") == 0)
1398 if (outermost_context_p ())
1399 { /* We attempted to pop an empty context stack. */
1400 eb_complaint (cs
->c_symnum
);
1403 struct context_stack cstk
= pop_context ();
1404 if (depth
-- != cstk
.depth
)
1406 eb_complaint (cs
->c_symnum
);
1409 if (*get_local_symbols () && !outermost_context_p ())
1411 /* Make a block for the local symbols within. */
1412 finish_block (cstk
.name
,
1413 cstk
.old_blocks
, NULL
,
1416 + objfile
->text_section_offset ()));
1418 *get_local_symbols () = cstk
.locals
;
1423 process_xcoff_symbol (cs
, objfile
);
1428 if (get_last_source_file ())
1430 struct compunit_symtab
*cust
;
1432 complete_symtab (filestring
, file_start_addr
);
1433 cur_src_end_addr
= file_end_addr
;
1434 cust
= end_compunit_symtab (file_end_addr
);
1435 /* When reading symbols for the last C_FILE of the objfile, try
1436 to make sure that we set pst->compunit_symtab to the symtab for the
1437 file, not to the _globals_ symtab. I'm not sure whether this
1438 actually works right or when/if it comes up. */
1439 if (pst
->compunit_symtab
== NULL
)
1440 pst
->compunit_symtab
= cust
;
1445 #define SYMNAME_ALLOC(NAME, ALLOCED) \
1446 ((ALLOCED) ? (NAME) : obstack_strdup (&objfile->objfile_obstack, \
1450 /* process one xcoff symbol. */
1452 static struct symbol
*
1453 process_xcoff_symbol (struct xcoff_symbol
*cs
, struct objfile
*objfile
)
1455 struct symbol onesymbol
;
1456 struct symbol
*sym
= &onesymbol
;
1457 struct symbol
*sym2
= NULL
;
1463 if (cs
->c_secnum
< 0)
1465 /* The value is a register number, offset within a frame, etc.,
1466 and does not get relocated. */
1472 sec
= secnum_to_section (cs
->c_secnum
, objfile
);
1473 off
= objfile
->section_offsets
[sec
];
1480 /* default assumptions */
1481 sym
->set_value_address (cs
->c_value
+ off
);
1482 sym
->set_domain (VAR_DOMAIN
);
1483 sym
->set_section_index (secnum_to_section (cs
->c_secnum
, objfile
));
1485 if (ISFCN (cs
->c_type
))
1487 /* At this point, we don't know the type of the function. This
1488 will be patched with the type from its stab entry later on in
1489 patch_block_stabs (), unless the file was compiled without -g. */
1491 sym
->set_linkage_name (SYMNAME_ALLOC (name
, symname_alloced
));
1492 sym
->set_type (builtin_type (objfile
)->nodebug_text_symbol
);
1494 sym
->set_aclass_index (LOC_BLOCK
);
1495 sym2
= new (&objfile
->objfile_obstack
) symbol (*sym
);
1497 if (cs
->c_sclass
== C_EXT
|| C_WEAKEXT
)
1498 add_symbol_to_list (sym2
, get_global_symbols ());
1499 else if (cs
->c_sclass
== C_HIDEXT
|| cs
->c_sclass
== C_STAT
)
1500 add_symbol_to_list (sym2
, get_file_symbols ());
1504 /* In case we can't figure out the type, provide default. */
1505 sym
->set_type (builtin_type (objfile
)->nodebug_data_symbol
);
1507 switch (cs
->c_sclass
)
1510 /* The values of functions and global symbols are now resolved
1511 via the global_sym_chain in stabsread.c. */
1513 if (fcn_cs_saved
.c_sclass
== C_EXT
)
1514 add_stab_to_list (name
, &global_stabs
);
1516 add_stab_to_list (name
, &file_stabs
);
1520 add_stab_to_list (name
, &global_stabs
);
1525 common_block_start (cs
->c_name
, objfile
);
1529 common_block_end (objfile
);
1533 complaint (_("Unexpected storage class: %d"),
1546 sym
= define_symbol (cs
->c_value
+ off
, cs
->c_name
, 0, 0, objfile
);
1549 sym
->set_section_index (sec
);
1556 /* For xlc (not GCC), the 'V' symbol descriptor is used for
1557 all statics and we need to distinguish file-scope versus
1558 function-scope using within_function. We do this by
1559 changing the string we pass to define_symbol to use 'S'
1560 where we need to, which is not necessarily super-clean,
1561 but seems workable enough. */
1566 pp
= strchr (name
, ':');
1571 if (*pp
== 'V' && !within_function
)
1573 sym
= define_symbol ((cs
->c_value
1574 + objfile
->section_offsets
[static_block_section
]),
1575 cs
->c_name
, 0, 0, objfile
);
1578 sym
->set_value_address
1579 (sym
->value_address () + static_block_base
);
1580 sym
->set_section_index (static_block_section
);
1589 /* Extract the file name from the aux entry of a C_FILE symbol.
1590 Result is in static storage and is only good for temporary use. */
1593 coff_getfilename (union internal_auxent
*aux_entry
, struct objfile
*objfile
)
1595 static char buffer
[BUFSIZ
];
1597 if (aux_entry
->x_file
.x_n
.x_n
.x_zeroes
== 0)
1598 strcpy (buffer
, (XCOFF_DATA (objfile
)->strtbl
1599 + aux_entry
->x_file
.x_n
.x_n
.x_offset
));
1602 size_t x_fname_len
= sizeof (aux_entry
->x_file
.x_n
.x_fname
);
1603 strncpy (buffer
, aux_entry
->x_file
.x_n
.x_fname
, x_fname_len
);
1604 buffer
[x_fname_len
] = '\0';
1609 /* Set *SYMBOL to symbol number symno in symtbl. */
1611 read_symbol (struct internal_syment
*symbol
, int symno
)
1613 struct xcoff_symfile_info
*xcoff
= XCOFF_DATA (this_symtab_objfile
);
1614 int nsyms
= xcoff
->symtbl_num_syms
;
1615 char *stbl
= xcoff
->symtbl
;
1617 if (symno
< 0 || symno
>= nsyms
)
1619 complaint (_("Invalid symbol offset"));
1620 symbol
->n_value
= 0;
1621 symbol
->n_scnum
= -1;
1624 bfd_coff_swap_sym_in (this_symtab_objfile
->obfd
.get (),
1625 stbl
+ (symno
* local_symesz
),
1629 /* Get value corresponding to symbol number symno in symtbl. */
1632 read_symbol_nvalue (int symno
)
1634 struct internal_syment symbol
[1];
1636 read_symbol (symbol
, symno
);
1637 return symbol
->n_value
;
1641 /* Find the address of the function corresponding to symno, where
1642 symno is the symbol pointed to by the linetable. */
1645 read_symbol_lineno (int symno
)
1647 struct objfile
*objfile
= this_symtab_objfile
;
1648 int xcoff64
= bfd_xcoff_is_xcoff64 (objfile
->obfd
);
1650 struct xcoff_symfile_info
*info
= XCOFF_DATA (objfile
);
1651 int nsyms
= info
->symtbl_num_syms
;
1652 char *stbl
= info
->symtbl
;
1653 char *strtbl
= info
->strtbl
;
1655 struct internal_syment symbol
[1];
1656 union internal_auxent main_aux
[1];
1660 bf_notfound_complaint ();
1664 /* Note that just searching for a short distance (e.g. 50 symbols)
1665 is not enough, at least in the following case.
1668 [many .stabx entries]
1669 [a few functions, referring to foo]
1673 What happens here is that the assembler moves the .stabx entries
1674 to right before the ".bf" for foo, but the symbol for "foo" is before
1675 all the stabx entries. See PR gdb/2222. */
1677 /* Maintaining a table of .bf entries might be preferable to this search.
1678 If I understand things correctly it would need to be done only for
1679 the duration of a single psymtab to symtab conversion. */
1680 while (symno
< nsyms
)
1682 bfd_coff_swap_sym_in (symfile_bfd
,
1683 stbl
+ (symno
* local_symesz
), symbol
);
1684 if (symbol
->n_sclass
== C_FCN
)
1686 char *name
= xcoff64
? strtbl
+ symbol
->n_offset
: symbol
->n_name
;
1688 if (strcmp (name
, ".bf") == 0)
1691 symno
+= symbol
->n_numaux
+ 1;
1694 bf_notfound_complaint ();
1698 /* Take aux entry and return its lineno. */
1700 bfd_coff_swap_aux_in (objfile
->obfd
.get (), stbl
+ symno
* local_symesz
,
1701 symbol
->n_type
, symbol
->n_sclass
,
1702 0, symbol
->n_numaux
, main_aux
);
1704 return main_aux
->x_sym
.x_misc
.x_lnsz
.x_lnno
;
1707 /* Support for line number handling. */
1709 /* This function is called for every section; it finds the outer limits
1710 * of the line table (minimum and maximum file offset) so that the
1711 * mainline code can read the whole thing for efficiency.
1714 find_linenos (struct bfd
*abfd
, struct bfd_section
*asect
, void *vpinfo
)
1716 struct xcoff_symfile_info
*info
;
1718 file_ptr offset
, maxoff
;
1720 count
= asect
->lineno_count
;
1722 if (strcmp (asect
->name
, ".text") != 0 || count
== 0)
1725 size
= count
* coff_data (abfd
)->local_linesz
;
1726 info
= (struct xcoff_symfile_info
*) vpinfo
;
1727 offset
= asect
->line_filepos
;
1728 maxoff
= offset
+ size
;
1730 if (offset
< info
->min_lineno_offset
|| info
->min_lineno_offset
== 0)
1731 info
->min_lineno_offset
= offset
;
1733 if (maxoff
> info
->max_lineno_offset
)
1734 info
->max_lineno_offset
= maxoff
;
1738 xcoff_expand_psymtab (legacy_psymtab
*pst
, struct objfile
*objfile
)
1740 gdb_assert (!pst
->readin
);
1742 /* Read in all partial symtabs on which this one is dependent. */
1743 pst
->expand_dependencies (objfile
);
1745 if (((struct xcoff_symloc
*) pst
->read_symtab_private
)->numsyms
!= 0)
1747 /* Init stuff necessary for reading in symbols. */
1750 scoped_free_pendings free_pending
;
1751 read_xcoff_symtab (objfile
, pst
);
1757 /* Read in all of the symbols for a given psymtab for real.
1758 Be verbose about it if the user wants that. SELF is not NULL. */
1761 xcoff_read_symtab (legacy_psymtab
*self
, struct objfile
*objfile
)
1763 gdb_assert (!self
->readin
);
1765 if (((struct xcoff_symloc
*) self
->read_symtab_private
)->numsyms
!= 0
1766 || self
->number_of_dependencies
)
1768 next_symbol_text_func
= xcoff_next_symbol_text
;
1770 self
->expand_psymtab (objfile
);
1772 /* Match with global symbols. This only needs to be done once,
1773 after all of the symtabs and dependencies have been read in. */
1774 scan_file_globals (objfile
);
1779 xcoff_new_init (struct objfile
*objfile
)
1781 stabsread_new_init ();
1784 /* Do initialization in preparation for reading symbols from OBJFILE.
1786 We will only be called if this is an XCOFF or XCOFF-like file.
1787 BFD handles figuring out the format of the file, and code in symfile.c
1788 uses BFD's determination to vector to us. */
1791 xcoff_symfile_init (struct objfile
*objfile
)
1793 /* Allocate struct to keep track of the symfile. */
1794 xcoff_objfile_data_key
.emplace (objfile
);
1797 /* Perform any local cleanups required when we are done with a particular
1798 objfile. I.E, we are in the process of discarding all symbol information
1799 for an objfile, freeing up all memory held for it, and unlinking the
1800 objfile struct from the global list of known objfiles. */
1803 xcoff_symfile_finish (struct objfile
*objfile
)
1805 /* Start with a fresh include table for the next objfile. */
1810 delete main_subfile
;
1812 inclIndx
= inclLength
= inclDepth
= 0;
1817 init_stringtab (bfd
*abfd
, file_ptr offset
, struct objfile
*objfile
)
1821 unsigned char lengthbuf
[4];
1823 struct xcoff_symfile_info
*xcoff
= XCOFF_DATA (objfile
);
1825 xcoff
->strtbl
= NULL
;
1827 if (bfd_seek (abfd
, offset
, SEEK_SET
) < 0)
1828 error (_("cannot seek to string table in %s: %s"),
1829 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1831 val
= bfd_read ((char *) lengthbuf
, sizeof lengthbuf
, abfd
);
1832 length
= bfd_h_get_32 (abfd
, lengthbuf
);
1834 /* If no string table is needed, then the file may end immediately
1835 after the symbols. Just return with `strtbl' set to NULL. */
1837 if (val
!= sizeof lengthbuf
|| length
< sizeof lengthbuf
)
1840 /* Allocate string table from objfile_obstack. We will need this table
1841 as long as we have its symbol table around. */
1843 strtbl
= (char *) obstack_alloc (&objfile
->objfile_obstack
, length
);
1844 xcoff
->strtbl
= strtbl
;
1846 /* Copy length buffer, the first byte is usually zero and is
1847 used for stabs with a name length of zero. */
1848 memcpy (strtbl
, lengthbuf
, sizeof lengthbuf
);
1849 if (length
== sizeof lengthbuf
)
1852 val
= bfd_read (strtbl
+ sizeof lengthbuf
, length
- sizeof lengthbuf
, abfd
);
1854 if (val
!= length
- sizeof lengthbuf
)
1855 error (_("cannot read string table from %s: %s"),
1856 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1857 if (strtbl
[length
- 1] != '\0')
1858 error (_("bad symbol file: string table "
1859 "does not end with null character"));
1864 /* If we have not yet seen a function for this psymtab, this is 0. If we
1865 have seen one, it is the offset in the line numbers of the line numbers
1867 static unsigned int first_fun_line_offset
;
1869 /* Allocate and partially fill a partial symtab. It will be
1870 completely filled at the end of the symbol list.
1872 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
1873 is the address relative to which its symbols are (incremental) or 0
1876 static legacy_psymtab
*
1877 xcoff_start_psymtab (psymtab_storage
*partial_symtabs
,
1878 struct objfile
*objfile
,
1879 const char *filename
, int first_symnum
)
1881 /* We fill in textlow later. */
1882 legacy_psymtab
*result
= new legacy_psymtab (filename
, partial_symtabs
,
1884 unrelocated_addr (0));
1886 result
->read_symtab_private
=
1887 XOBNEW (&objfile
->objfile_obstack
, struct xcoff_symloc
);
1888 ((struct xcoff_symloc
*) result
->read_symtab_private
)->first_symnum
= first_symnum
;
1889 result
->legacy_read_symtab
= xcoff_read_symtab
;
1890 result
->legacy_expand_psymtab
= xcoff_expand_psymtab
;
1892 /* Deduce the source language from the filename for this psymtab. */
1893 psymtab_language
= deduce_language_from_filename (filename
);
1898 /* Close off the current usage of PST.
1899 Returns PST, or NULL if the partial symtab was empty and thrown away.
1901 CAPPING_SYMBOL_NUMBER is the end of pst (exclusive).
1903 INCLUDE_LIST, NUM_INCLUDES, DEPENDENCY_LIST, and NUMBER_DEPENDENCIES
1904 are the information for includes and dependencies. */
1906 static legacy_psymtab
*
1907 xcoff_end_psymtab (struct objfile
*objfile
, psymtab_storage
*partial_symtabs
,
1908 legacy_psymtab
*pst
,
1909 const char **include_list
, int num_includes
,
1910 int capping_symbol_number
,
1911 legacy_psymtab
**dependency_list
,
1912 int number_dependencies
, int textlow_not_set
)
1916 if (capping_symbol_number
!= -1)
1917 ((struct xcoff_symloc
*) pst
->read_symtab_private
)->numsyms
=
1918 capping_symbol_number
1919 - ((struct xcoff_symloc
*) pst
->read_symtab_private
)->first_symnum
;
1920 ((struct xcoff_symloc
*) pst
->read_symtab_private
)->lineno_off
=
1921 first_fun_line_offset
;
1922 first_fun_line_offset
= 0;
1926 pst
->number_of_dependencies
= number_dependencies
;
1927 if (number_dependencies
)
1930 = partial_symtabs
->allocate_dependencies (number_dependencies
);
1931 memcpy (pst
->dependencies
, dependency_list
,
1932 number_dependencies
* sizeof (legacy_psymtab
*));
1935 pst
->dependencies
= 0;
1937 for (i
= 0; i
< num_includes
; i
++)
1939 legacy_psymtab
*subpst
=
1940 new legacy_psymtab (include_list
[i
], partial_symtabs
, objfile
->per_bfd
);
1942 subpst
->read_symtab_private
= XOBNEW (&objfile
->objfile_obstack
, xcoff_symloc
);
1943 ((struct xcoff_symloc
*) subpst
->read_symtab_private
)->first_symnum
= 0;
1944 ((struct xcoff_symloc
*) subpst
->read_symtab_private
)->numsyms
= 0;
1946 /* We could save slight bits of space by only making one of these,
1947 shared by the entire set of include files. FIXME-someday. */
1948 subpst
->dependencies
=
1949 partial_symtabs
->allocate_dependencies (1);
1950 subpst
->dependencies
[0] = pst
;
1951 subpst
->number_of_dependencies
= 1;
1953 subpst
->legacy_read_symtab
= pst
->legacy_read_symtab
;
1954 subpst
->legacy_expand_psymtab
= pst
->legacy_expand_psymtab
;
1957 if (num_includes
== 0
1958 && number_dependencies
== 0
1961 /* Throw away this psymtab, it's empty. */
1962 /* Empty psymtabs happen as a result of header files which don't have
1963 any symbols in them. There can be a lot of them. */
1965 partial_symtabs
->discard_psymtab (pst
);
1967 /* Indicate that psymtab was thrown away. */
1973 /* Swap raw symbol at *RAW and put the name in *NAME, the symbol in
1974 *SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over
1975 the symbol and its auxents. */
1978 swap_sym (struct internal_syment
*symbol
, union internal_auxent
*aux
,
1979 const char **name
, char **raw
, unsigned int *symnump
,
1980 struct objfile
*objfile
)
1982 bfd_coff_swap_sym_in (objfile
->obfd
.get (), *raw
, symbol
);
1983 if (symbol
->n_zeroes
)
1985 /* If it's exactly E_SYMNMLEN characters long it isn't
1987 if (symbol
->n_name
[E_SYMNMLEN
- 1] != '\0')
1989 /* FIXME: wastes memory for symbols which we don't end up putting
1990 into the minimal symbols. */
1993 p
= (char *) obstack_alloc (&objfile
->objfile_obstack
,
1995 strncpy (p
, symbol
->n_name
, E_SYMNMLEN
);
1996 p
[E_SYMNMLEN
] = '\0';
2000 /* Point to the unswapped name as that persists as long as the
2002 *name
= ((struct external_syment
*) *raw
)->e
.e_name
;
2004 else if (symbol
->n_sclass
& 0x80)
2006 *name
= XCOFF_DATA (objfile
)->debugsec
+ symbol
->n_offset
;
2010 *name
= XCOFF_DATA (objfile
)->strtbl
+ symbol
->n_offset
;
2013 *raw
+= coff_data (objfile
->obfd
)->local_symesz
;
2014 if (symbol
->n_numaux
> 0)
2016 bfd_coff_swap_aux_in (objfile
->obfd
.get (), *raw
, symbol
->n_type
,
2017 symbol
->n_sclass
, 0, symbol
->n_numaux
, aux
);
2019 *symnump
+= symbol
->n_numaux
;
2020 *raw
+= coff_data (objfile
->obfd
)->local_symesz
* symbol
->n_numaux
;
2025 function_outside_compilation_unit_complaint (const char *arg1
)
2027 complaint (_("function `%s' appears to be defined "
2028 "outside of all compilation units"),
2033 scan_xcoff_symtab (minimal_symbol_reader
&reader
,
2034 psymtab_storage
*partial_symtabs
,
2035 struct objfile
*objfile
)
2037 CORE_ADDR toc_offset
= 0; /* toc offset value in data section. */
2038 const char *filestring
= NULL
;
2040 const char *namestring
;
2045 /* Current partial symtab */
2046 legacy_psymtab
*pst
;
2048 /* List of current psymtab's include files. */
2049 const char **psymtab_include_list
;
2050 int includes_allocated
;
2053 /* Index within current psymtab dependency list. */
2054 legacy_psymtab
**dependency_list
;
2055 int dependencies_used
, dependencies_allocated
;
2058 struct internal_syment symbol
;
2059 union internal_auxent main_aux
[5];
2060 unsigned int ssymnum
;
2062 const char *last_csect_name
= NULL
; /* Last seen csect's name and value. */
2063 unrelocated_addr last_csect_val
= unrelocated_addr (0);
2064 int last_csect_sec
= 0;
2065 int misc_func_recorded
= 0; /* true if any misc. function. */
2066 int textlow_not_set
= 1;
2068 pst
= (legacy_psymtab
*) 0;
2070 includes_allocated
= 30;
2072 psymtab_include_list
= (const char **) alloca (includes_allocated
*
2073 sizeof (const char *));
2075 dependencies_allocated
= 30;
2076 dependencies_used
= 0;
2078 (legacy_psymtab
**) alloca (dependencies_allocated
*
2079 sizeof (legacy_psymtab
*));
2081 set_last_source_file (NULL
);
2083 abfd
= objfile
->obfd
.get ();
2084 next_symbol_text_func
= xcoff_next_symbol_text
;
2086 sraw_symbol
= XCOFF_DATA (objfile
)->symtbl
;
2087 nsyms
= XCOFF_DATA (objfile
)->symtbl_num_syms
;
2089 while (ssymnum
< nsyms
)
2095 bfd_coff_swap_sym_in (abfd
, sraw_symbol
, &symbol
);
2096 sclass
= symbol
.n_sclass
;
2104 /* The CSECT auxent--always the last auxent. */
2105 union internal_auxent csect_aux
;
2106 unsigned int symnum_before
= ssymnum
;
2108 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2110 if (symbol
.n_numaux
> 1)
2112 bfd_coff_swap_aux_in
2113 (objfile
->obfd
.get (),
2114 sraw_symbol
- coff_data (abfd
)->local_symesz
,
2117 symbol
.n_numaux
- 1,
2122 csect_aux
= main_aux
[0];
2124 /* If symbol name starts with ".$" or "$", ignore it. */
2125 if (namestring
[0] == '$'
2126 || (namestring
[0] == '.' && namestring
[1] == '$'))
2129 switch (csect_aux
.x_csect
.x_smtyp
& 0x7)
2132 switch (csect_aux
.x_csect
.x_smclas
)
2135 if (last_csect_name
)
2137 /* If no misc. function recorded in the last
2138 seen csect, enter it as a function. This
2139 will take care of functions like strcmp()
2142 if (!misc_func_recorded
)
2144 record_minimal_symbol
2145 (reader
, last_csect_name
, last_csect_val
,
2146 mst_text
, last_csect_sec
, objfile
);
2147 misc_func_recorded
= 1;
2152 /* We have to allocate one psymtab for
2153 each program csect, because their text
2154 sections need not be adjacent. */
2156 (objfile
, partial_symtabs
, pst
, psymtab_include_list
,
2157 includes_used
, symnum_before
, dependency_list
,
2158 dependencies_used
, textlow_not_set
);
2160 dependencies_used
= 0;
2161 /* Give all psymtabs for this source file the same
2163 pst
= xcoff_start_psymtab
2164 (partial_symtabs
, objfile
,
2169 /* Activate the misc_func_recorded mechanism for
2170 compiler- and linker-generated CSECTs like ".strcmp"
2172 if (namestring
&& (namestring
[0] == '.'
2173 || namestring
[0] == '@'))
2175 last_csect_name
= namestring
;
2176 last_csect_val
= unrelocated_addr (symbol
.n_value
);
2177 last_csect_sec
= symbol
.n_scnum
;
2181 unrelocated_addr highval
2182 = unrelocated_addr (symbol
.n_value
2183 + CSECT_LEN (&csect_aux
));
2185 if (highval
> pst
->unrelocated_text_high ())
2186 pst
->set_text_high (highval
);
2187 unrelocated_addr loval
2188 = unrelocated_addr (symbol
.n_value
);
2189 if (!pst
->text_low_valid
2190 || loval
< pst
->unrelocated_text_low ())
2191 pst
->set_text_low (loval
);
2193 misc_func_recorded
= 0;
2198 /* Data variables are recorded in the minimal symbol
2199 table, except for section symbols. */
2200 if (*namestring
!= '.')
2201 record_minimal_symbol
2202 (reader
, namestring
, unrelocated_addr (symbol
.n_value
),
2203 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2204 symbol
.n_scnum
, objfile
);
2209 warning (_("More than one XMC_TC0 symbol found."));
2210 toc_offset
= symbol
.n_value
;
2212 /* Make TOC offset relative to start address of
2214 bfd_sect
= secnum_to_bfd_section (symbol
.n_scnum
, objfile
);
2216 toc_offset
-= bfd_section_vma (bfd_sect
);
2220 /* These symbols tell us where the TOC entry for a
2221 variable is, not the variable itself. */
2230 switch (csect_aux
.x_csect
.x_smclas
)
2233 /* A function entry point. */
2235 if (first_fun_line_offset
== 0 && symbol
.n_numaux
> 1)
2236 first_fun_line_offset
=
2237 main_aux
[0].x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
;
2239 record_minimal_symbol
2240 (reader
, namestring
, unrelocated_addr (symbol
.n_value
),
2241 sclass
== C_HIDEXT
? mst_file_text
: mst_text
,
2242 symbol
.n_scnum
, objfile
);
2243 misc_func_recorded
= 1;
2247 /* shared library function trampoline code entry
2250 /* record trampoline code entries as
2251 mst_solib_trampoline symbol. When we lookup mst
2252 symbols, we will choose mst_text over
2253 mst_solib_trampoline. */
2254 record_minimal_symbol
2255 (reader
, namestring
, unrelocated_addr (symbol
.n_value
),
2256 mst_solib_trampoline
, symbol
.n_scnum
, objfile
);
2257 misc_func_recorded
= 1;
2261 /* The symbols often have the same names as
2262 debug symbols for functions, and confuse
2268 /* xlc puts each variable in a separate csect,
2269 so we get an XTY_SD for each variable. But
2270 gcc puts several variables in a csect, so
2271 that each variable only gets an XTY_LD. We
2272 still need to record them. This will
2273 typically be XMC_RW; I suspect XMC_RO and
2274 XMC_BS might be possible too. */
2275 if (*namestring
!= '.')
2276 record_minimal_symbol
2277 (reader
, namestring
, unrelocated_addr (symbol
.n_value
),
2278 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2279 symbol
.n_scnum
, objfile
);
2285 switch (csect_aux
.x_csect
.x_smclas
)
2289 /* Common variables are recorded in the minimal symbol
2290 table, except for section symbols. */
2291 if (*namestring
!= '.')
2292 record_minimal_symbol
2293 (reader
, namestring
, unrelocated_addr (symbol
.n_value
),
2294 sclass
== C_HIDEXT
? mst_file_bss
: mst_bss
,
2295 symbol
.n_scnum
, objfile
);
2307 unsigned int symnum_before
;
2309 symnum_before
= ssymnum
;
2310 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2313 /* See if the last csect needs to be recorded. */
2315 if (last_csect_name
&& !misc_func_recorded
)
2317 /* If no misc. function recorded in the last seen csect, enter
2318 it as a function. This will take care of functions like
2319 strcmp() compiled by xlc. */
2321 record_minimal_symbol (reader
, last_csect_name
, last_csect_val
,
2322 mst_text
, last_csect_sec
, objfile
);
2323 misc_func_recorded
= 1;
2328 xcoff_end_psymtab (objfile
, partial_symtabs
,
2329 pst
, psymtab_include_list
,
2330 includes_used
, symnum_before
,
2331 dependency_list
, dependencies_used
,
2334 dependencies_used
= 0;
2336 first_fun_line_offset
= 0;
2338 /* XCOFF, according to the AIX 3.2 documentation, puts the
2339 filename in cs->c_name. But xlc 1.3.0.2 has decided to
2340 do things the standard COFF way and put it in the auxent.
2341 We use the auxent if the symbol is ".file" and an auxent
2342 exists, otherwise use the symbol itself. */
2343 if (!strcmp (namestring
, ".file") && symbol
.n_numaux
> 0)
2345 filestring
= coff_getfilename (&main_aux
[0], objfile
);
2348 filestring
= namestring
;
2350 pst
= xcoff_start_psymtab (partial_symtabs
, objfile
,
2353 last_csect_name
= NULL
;
2359 complaint (_("Storage class %d not recognized during scan"),
2365 /* C_FCN is .bf and .ef symbols. I think it is sufficient
2366 to handle only the C_FUN and C_EXT. */
2380 /* C_EINCL means we are switching back to the main file. But there
2381 is no reason to care; the only thing we want to know about
2382 includes is the names of all the included (.h) files. */
2387 /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be
2391 /* I don't think the name of the common block (as opposed to the
2392 variables within it) is something which is user visible
2400 /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL
2401 so C_LSYM would appear to be only for locals. */
2407 /* We probably could save a few instructions by assuming that
2408 C_LSYM, C_PSYM, etc., never have auxents. */
2409 int naux1
= symbol
.n_numaux
+ 1;
2412 sraw_symbol
+= bfd_coff_symesz (abfd
) * naux1
;
2418 /* Mark down an include file in the current psymtab. */
2419 enum language tmp_language
;
2421 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2424 tmp_language
= deduce_language_from_filename (namestring
);
2426 /* Only change the psymtab's language if we've learned
2427 something useful (eg. tmp_language is not language_unknown).
2428 In addition, to match what start_subfile does, never change
2430 if (tmp_language
!= language_unknown
2431 && (tmp_language
!= language_c
2432 || psymtab_language
!= language_cplus
))
2433 psymtab_language
= tmp_language
;
2435 /* In C++, one may expect the same filename to come round many
2436 times, when code is coming alternately from the main file
2437 and from inline functions in other files. So I check to see
2438 if this is a file we've seen before -- either the main
2439 source file, or a previously included file.
2441 This seems to be a lot of time to be spending on N_SOL, but
2442 things like "break c-exp.y:435" need to work (I
2443 suppose the psymtab_include_list could be hashed or put
2444 in a binary tree, if profiling shows this is a major hog). */
2445 if (pst
&& strcmp (namestring
, pst
->filename
) == 0)
2451 for (i
= 0; i
< includes_used
; i
++)
2452 if (strcmp (namestring
, psymtab_include_list
[i
]) == 0)
2460 psymtab_include_list
[includes_used
++] = namestring
;
2461 if (includes_used
>= includes_allocated
)
2463 const char **orig
= psymtab_include_list
;
2465 psymtab_include_list
= (const char **)
2466 alloca ((includes_allocated
*= 2) *
2467 sizeof (const char *));
2468 memcpy (psymtab_include_list
, orig
,
2469 includes_used
* sizeof (const char *));
2474 /* The value of the C_FUN is not the address of the function (it
2475 appears to be the address before linking), but as long as it
2476 is smaller than the actual address, then find_pc_partial_function
2477 will use the minimal symbols instead. I hope. */
2486 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2489 p
= strchr (namestring
, ':');
2491 continue; /* Not a debugging symbol. */
2493 /* Main processing section for debugging symbols which
2494 the initial read through the symbol tables needs to worry
2495 about. If we reach this point, the symbol which we are
2496 considering is definitely one we are interested in.
2497 p must also contain the (valid) index into the namestring
2498 which indicates the debugging type symbol. */
2503 pst
->add_psymbol (std::string_view (namestring
,
2505 true, VAR_DOMAIN
, LOC_STATIC
,
2506 SECT_OFF_DATA (objfile
),
2507 psymbol_placement::STATIC
,
2508 unrelocated_addr (symbol
.n_value
),
2510 partial_symtabs
, objfile
);
2514 /* The addresses in these entries are reported to be
2515 wrong. See the code that reads 'G's for symtabs. */
2516 pst
->add_psymbol (std::string_view (namestring
,
2518 true, VAR_DOMAIN
, LOC_STATIC
,
2519 SECT_OFF_DATA (objfile
),
2520 psymbol_placement::GLOBAL
,
2521 unrelocated_addr (symbol
.n_value
),
2523 partial_symtabs
, objfile
);
2527 /* When a 'T' entry is defining an anonymous enum, it
2528 may have a name which is the empty string, or a
2529 single space. Since they're not really defining a
2530 symbol, those shouldn't go in the partial symbol
2531 table. We do pick up the elements of such enums at
2532 'check_enum:', below. */
2533 if (p
>= namestring
+ 2
2534 || (p
== namestring
+ 1
2535 && namestring
[0] != ' '))
2537 pst
->add_psymbol (std::string_view (namestring
,
2539 true, STRUCT_DOMAIN
, LOC_TYPEDEF
, -1,
2540 psymbol_placement::STATIC
,
2541 unrelocated_addr (0),
2543 partial_symtabs
, objfile
);
2546 /* Also a typedef with the same name. */
2547 pst
->add_psymbol (std::string_view (namestring
,
2549 true, VAR_DOMAIN
, LOC_TYPEDEF
, -1,
2550 psymbol_placement::STATIC
,
2551 unrelocated_addr (0),
2553 partial_symtabs
, objfile
);
2560 if (p
!= namestring
) /* a name is there, not just :T... */
2562 pst
->add_psymbol (std::string_view (namestring
,
2564 true, VAR_DOMAIN
, LOC_TYPEDEF
, -1,
2565 psymbol_placement::STATIC
,
2566 unrelocated_addr (0),
2568 partial_symtabs
, objfile
);
2571 /* If this is an enumerated type, we need to
2572 add all the enum constants to the partial symbol
2573 table. This does not cover enums without names, e.g.
2574 "enum {a, b} c;" in C, but fortunately those are
2575 rare. There is no way for GDB to find those from the
2576 enum type without spending too much time on it. Thus
2577 to solve this problem, the compiler needs to put out the
2578 enum in a nameless type. GCC2 does this. */
2580 /* We are looking for something of the form
2581 <name> ":" ("t" | "T") [<number> "="] "e"
2582 {<constant> ":" <value> ","} ";". */
2584 /* Skip over the colon and the 't' or 'T'. */
2586 /* This type may be given a number. Also, numbers can come
2587 in pairs like (0,26). Skip over it. */
2588 while ((*p
>= '0' && *p
<= '9')
2589 || *p
== '(' || *p
== ',' || *p
== ')'
2595 /* The aix4 compiler emits extra crud before the
2599 /* Skip over the type (?). */
2603 /* Skip over the colon. */
2607 /* We have found an enumerated type. */
2608 /* According to comments in read_enum_type
2609 a comma could end it instead of a semicolon.
2610 I don't know where that happens.
2612 while (*p
&& *p
!= ';' && *p
!= ',')
2616 /* Check for and handle cretinous dbx symbol name
2618 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
2619 p
= next_symbol_text (objfile
);
2621 /* Point to the character after the name
2622 of the enum constant. */
2623 for (q
= p
; *q
&& *q
!= ':'; q
++)
2625 /* Note that the value doesn't matter for
2626 enum constants in psymtabs, just in symtabs. */
2627 pst
->add_psymbol (std::string_view (p
, q
- p
), true,
2628 VAR_DOMAIN
, LOC_CONST
, -1,
2629 psymbol_placement::STATIC
,
2630 unrelocated_addr (0),
2632 partial_symtabs
, objfile
);
2633 /* Point past the name. */
2635 /* Skip over the value. */
2636 while (*p
&& *p
!= ',')
2638 /* Advance past the comma. */
2646 /* Constant, e.g. from "const" in Pascal. */
2647 pst
->add_psymbol (std::string_view (namestring
,
2649 true, VAR_DOMAIN
, LOC_CONST
, -1,
2650 psymbol_placement::STATIC
,
2651 unrelocated_addr (0),
2653 partial_symtabs
, objfile
);
2659 std::string
name (namestring
, (p
- namestring
));
2660 function_outside_compilation_unit_complaint (name
.c_str ());
2662 pst
->add_psymbol (std::string_view (namestring
,
2664 true, VAR_DOMAIN
, LOC_BLOCK
,
2665 SECT_OFF_TEXT (objfile
),
2666 psymbol_placement::STATIC
,
2667 unrelocated_addr (symbol
.n_value
),
2669 partial_symtabs
, objfile
);
2672 /* Global functions were ignored here, but now they
2673 are put into the global psymtab like one would expect.
2674 They're also in the minimal symbol table. */
2678 std::string
name (namestring
, (p
- namestring
));
2679 function_outside_compilation_unit_complaint (name
.c_str ());
2682 /* We need only the minimal symbols for these
2683 loader-generated definitions. Keeping the global
2684 symbols leads to "in psymbols but not in symbols"
2686 if (startswith (namestring
, "@FIX"))
2689 pst
->add_psymbol (std::string_view (namestring
,
2691 true, VAR_DOMAIN
, LOC_BLOCK
,
2692 SECT_OFF_TEXT (objfile
),
2693 psymbol_placement::GLOBAL
,
2694 unrelocated_addr (symbol
.n_value
),
2696 partial_symtabs
, objfile
);
2699 /* Two things show up here (hopefully); static symbols of
2700 local scope (static used inside braces) or extensions
2701 of structure symbols. We can ignore both. */
2715 case '#': /* For symbol identification (used in
2720 /* It is a C++ nested symbol. We don't need to record it
2721 (I don't think); if we try to look up foo::bar::baz,
2722 then symbols for the symtab containing foo should get
2723 read in, I think. */
2724 /* Someone says sun cc puts out symbols like
2725 /foo/baz/maclib::/usr/local/bin/maclib,
2726 which would get here with a symbol type of ':'. */
2730 /* Unexpected symbol descriptor. The second and
2731 subsequent stabs of a continued stab can show up
2732 here. The question is whether they ever can mimic
2733 a normal stab--it would be nice if not, since we
2734 certainly don't want to spend the time searching to
2735 the end of every string looking for a
2738 complaint (_("unknown symbol descriptor `%c'"), p
[1]);
2740 /* Ignore it; perhaps it is an extension that we don't
2750 xcoff_end_psymtab (objfile
, partial_symtabs
,
2751 pst
, psymtab_include_list
, includes_used
,
2752 ssymnum
, dependency_list
,
2753 dependencies_used
, textlow_not_set
);
2756 /* Record the toc offset value of this symbol table into objfile
2757 structure. If no XMC_TC0 is found, toc_offset should be zero.
2758 Another place to obtain this information would be file auxiliary
2761 XCOFF_DATA (objfile
)->toc_offset
= toc_offset
;
2764 /* Return the toc offset value for a given objfile. */
2767 xcoff_get_toc_offset (struct objfile
*objfile
)
2770 return XCOFF_DATA (objfile
)->toc_offset
;
2774 /* Scan and build partial symbols for a symbol file.
2775 We have been initialized by a call to dbx_symfile_init, which
2776 put all the relevant info into a "struct dbx_symfile_info",
2777 hung off the objfile structure.
2779 SECTION_OFFSETS contains offsets relative to which the symbols in the
2780 various sections are (depending where the sections were actually
2784 xcoff_initial_scan (struct objfile
*objfile
, symfile_add_flags symfile_flags
)
2788 int num_symbols
; /* # of symbols */
2789 file_ptr symtab_offset
; /* symbol table and */
2790 file_ptr stringtab_offset
; /* string table file offsets */
2791 struct xcoff_symfile_info
*info
;
2795 info
= XCOFF_DATA (objfile
);
2796 symfile_bfd
= abfd
= objfile
->obfd
.get ();
2797 name
= objfile_name (objfile
);
2799 num_symbols
= bfd_get_symcount (abfd
); /* # of symbols */
2800 symtab_offset
= obj_sym_filepos (abfd
); /* symbol table file offset */
2801 stringtab_offset
= symtab_offset
+
2802 num_symbols
* coff_data (abfd
)->local_symesz
;
2804 info
->min_lineno_offset
= 0;
2805 info
->max_lineno_offset
= 0;
2806 bfd_map_over_sections (abfd
, find_linenos
, info
);
2808 if (num_symbols
> 0)
2810 /* Read the string table. */
2811 init_stringtab (abfd
, stringtab_offset
, objfile
);
2813 /* Read the .debug section, if present and if we're not ignoring
2815 if (!(objfile
->flags
& OBJF_READNEVER
))
2817 struct bfd_section
*secp
;
2818 bfd_size_type length
;
2819 bfd_byte
*debugsec
= NULL
;
2821 secp
= bfd_get_section_by_name (abfd
, ".debug");
2824 length
= bfd_section_size (secp
);
2828 = (bfd_byte
*) obstack_alloc (&objfile
->objfile_obstack
,
2831 if (!bfd_get_full_section_contents (abfd
, secp
, &debugsec
))
2833 error (_("Error reading .debug section of `%s': %s"),
2834 name
, bfd_errmsg (bfd_get_error ()));
2838 info
->debugsec
= (char *) debugsec
;
2842 /* Read the symbols. We keep them in core because we will want to
2843 access them randomly in read_symbol*. */
2844 val
= bfd_seek (abfd
, symtab_offset
, SEEK_SET
);
2846 error (_("Error reading symbols from %s: %s"),
2847 name
, bfd_errmsg (bfd_get_error ()));
2848 size
= coff_data (abfd
)->local_symesz
* num_symbols
;
2849 info
->symtbl
= (char *) obstack_alloc (&objfile
->objfile_obstack
, size
);
2850 info
->symtbl_num_syms
= num_symbols
;
2852 val
= bfd_read (info
->symtbl
, size
, abfd
);
2854 perror_with_name (_("reading symbol table"));
2856 scoped_free_pendings free_pending
;
2857 minimal_symbol_reader
reader (objfile
);
2859 /* Now that the symbol table data of the executable file are all in core,
2860 process them and define symbols accordingly. */
2862 psymbol_functions
*psf
= new psymbol_functions ();
2863 psymtab_storage
*partial_symtabs
= psf
->get_partial_symtabs ().get ();
2864 objfile
->qf
.emplace_front (psf
);
2865 scan_xcoff_symtab (reader
, partial_symtabs
, objfile
);
2867 /* Install any minimal symbols that have been collected as the current
2868 minimal symbols for this objfile. */
2872 /* DWARF2 sections. */
2874 if (dwarf2_has_info (objfile
, &dwarf2_xcoff_names
))
2875 dwarf2_initialize_objfile (objfile
);
2879 xcoff_symfile_offsets (struct objfile
*objfile
,
2880 const section_addr_info
&addrs
)
2882 const char *first_section_name
;
2884 default_symfile_offsets (objfile
, addrs
);
2886 /* Oneof the weird side-effects of default_symfile_offsets is that
2887 it sometimes sets some section indices to zero for sections that,
2888 in fact do not exist. See the body of default_symfile_offsets
2889 for more info on when that happens. Undo that, as this then allows
2890 us to test whether the associated section exists or not, and then
2891 access it quickly (without searching it again). */
2893 if (objfile
->section_offsets
.empty ())
2894 return; /* Is that even possible? Better safe than sorry. */
2897 = bfd_section_name (objfile
->sections_start
[0].the_bfd_section
);
2899 if (objfile
->sect_index_text
== 0
2900 && strcmp (first_section_name
, ".text") != 0)
2901 objfile
->sect_index_text
= -1;
2903 if (objfile
->sect_index_data
== 0
2904 && strcmp (first_section_name
, ".data") != 0)
2905 objfile
->sect_index_data
= -1;
2907 if (objfile
->sect_index_bss
== 0
2908 && strcmp (first_section_name
, ".bss") != 0)
2909 objfile
->sect_index_bss
= -1;
2911 if (objfile
->sect_index_rodata
== 0
2912 && strcmp (first_section_name
, ".rodata") != 0)
2913 objfile
->sect_index_rodata
= -1;
2916 /* Register our ability to parse symbols for xcoff BFD files. */
2918 static const struct sym_fns xcoff_sym_fns
=
2921 /* It is possible that coff and xcoff should be merged as
2922 they do have fundamental similarities (for example, the extra storage
2923 classes used for stabs could presumably be recognized in any COFF file).
2924 However, in addition to obvious things like all the csect hair, there are
2925 some subtler differences between xcoffread.c and coffread.c, notably
2926 the fact that coffread.c has no need to read in all the symbols, but
2927 xcoffread.c reads all the symbols and does in fact randomly access them
2928 (in C_BSTAT and line number processing). */
2930 xcoff_new_init
, /* init anything gbl to entire symtab */
2931 xcoff_symfile_init
, /* read initial info, setup for sym_read() */
2932 xcoff_initial_scan
, /* read a symbol file into symtab */
2933 xcoff_symfile_finish
, /* finished with file, cleanup */
2934 xcoff_symfile_offsets
, /* xlate offsets ext->int form */
2935 default_symfile_segments
, /* Get segment information from a file. */
2936 aix_process_linenos
,
2937 default_symfile_relocate
, /* Relocate a debug section. */
2938 NULL
, /* sym_probe_fns */
2941 /* Same as xcoff_get_n_import_files, but for core files. */
2944 xcoff_get_core_n_import_files (bfd
*abfd
)
2946 asection
*sect
= bfd_get_section_by_name (abfd
, ".ldinfo");
2948 file_ptr offset
= 0;
2952 return -1; /* Not a core file. */
2954 for (offset
= 0; offset
< bfd_section_size (sect
);)
2960 if (!bfd_get_section_contents (abfd
, sect
, buf
, offset
, 4))
2962 next
= bfd_get_32 (abfd
, buf
);
2964 break; /* This is the last entry. */
2968 /* Return the number of entries, excluding the first one, which is
2969 the path to the executable that produced this core file. */
2970 return n_entries
- 1;
2973 /* Return the number of import files (shared libraries) that the given
2974 BFD depends on. Return -1 if this number could not be computed. */
2977 xcoff_get_n_import_files (bfd
*abfd
)
2979 asection
*sect
= bfd_get_section_by_name (abfd
, ".loader");
2983 /* If the ".loader" section does not exist, the objfile is probably
2984 not an executable. Might be a core file... */
2986 return xcoff_get_core_n_import_files (abfd
);
2988 /* The number of entries in the Import Files Table is stored in
2989 field l_nimpid. This field is always at offset 16, and is
2990 always 4 bytes long. Read those 4 bytes. */
2992 if (!bfd_get_section_contents (abfd
, sect
, buf
, 16, 4))
2994 l_nimpid
= bfd_get_32 (abfd
, buf
);
2996 /* By convention, the first entry is the default LIBPATH value
2997 to be used by the system loader, so it does not count towards
2998 the number of import files. */
2999 return l_nimpid
- 1;
3002 void _initialize_xcoffread ();
3004 _initialize_xcoffread ()
3006 add_symtab_fns (bfd_target_xcoff_flavour
, &xcoff_sym_fns
);