1 /* Read AIX xcoff symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986-2020 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"
51 #include "gdb-stabs.h"
53 /* For interface with stabsread.c. */
54 #include "aout/stab_gnu.h"
57 /* We put a pointer to this structure in the read_symtab_private field
63 /* First symbol number for this file. */
67 /* Number of symbols in the section of the symbol table devoted to
68 this file's symbols (actually, the section bracketed may contain
69 more than just this file's symbols). If numsyms is 0, the only
70 reason for this thing's existence is the dependency list. Nothing
71 else will happen when it is read in. */
75 /* Position of the start of the line number information for this
77 unsigned int lineno_off
;
80 /* Remember what we deduced to be the source language of this psymtab. */
82 static enum language psymtab_language
= language_unknown
;
85 /* Simplified internal version of coff symbol table information. */
90 int c_symnum
; /* Symbol number of this entry. */
91 int c_naux
; /* 0 if syment only, 1 if syment + auxent. */
93 unsigned char c_sclass
;
98 /* Last function's saved coff symbol `cs'. */
100 static struct coff_symbol fcn_cs_saved
;
102 static bfd
*symfile_bfd
;
104 /* Core address of start and end of text of current source file.
105 This is calculated from the first function seen after a C_FILE
109 static CORE_ADDR cur_src_end_addr
;
111 /* Core address of the end of the first object file. */
113 static CORE_ADDR first_object_file_end
;
115 /* Initial symbol-table-debug-string vector length. */
117 #define INITIAL_STABVECTOR_LENGTH 40
119 /* Size of a COFF symbol. I think it is always 18, so I'm not sure
120 there is any reason not to just use a #define, but might as well
121 ask BFD for the size and store it here, I guess. */
123 static unsigned local_symesz
;
125 struct xcoff_symfile_info
127 file_ptr min_lineno_offset
{}; /* Where in file lowest line#s are. */
128 file_ptr max_lineno_offset
{}; /* 1+last byte of line#s in file. */
130 /* Pointer to the string table. */
131 char *strtbl
= nullptr;
133 /* Pointer to debug section. */
134 char *debugsec
= nullptr;
136 /* Pointer to the a.out symbol table. */
137 char *symtbl
= nullptr;
139 /* Number of symbols in symtbl. */
140 int symtbl_num_syms
= 0;
142 /* Offset in data section to TOC anchor. */
143 CORE_ADDR toc_offset
= 0;
146 /* Key for XCOFF-associated data. */
148 static const struct objfile_key
<xcoff_symfile_info
> xcoff_objfile_data_key
;
150 /* Convenience macro to access the per-objfile XCOFF data. */
152 #define XCOFF_DATA(objfile) \
153 xcoff_objfile_data_key.get (objfile)
155 /* XCOFF names for dwarf sections. There is no compressed sections. */
157 static const struct dwarf2_debug_sections dwarf2_xcoff_names
= {
159 { ".dwabrev", NULL
},
162 { NULL
, NULL
}, /* debug_loclists */
163 /* AIX XCOFF defines one, named DWARF section for macro debug information.
164 XLC does not generate debug_macinfo for DWARF4 and below.
165 The section is assigned to debug_macro for DWARF5 and above. */
169 { NULL
, NULL
}, /* debug_str_offsets */
170 { NULL
, NULL
}, /* debug_line_str */
171 { ".dwrnges", NULL
},
172 { NULL
, NULL
}, /* debug_rnglists */
173 { ".dwpbtyp", NULL
},
174 { NULL
, NULL
}, /* debug_addr */
175 { ".dwframe", NULL
},
176 { NULL
, NULL
}, /* eh_frame */
177 { NULL
, NULL
}, /* gdb_index */
178 { NULL
, NULL
}, /* debug_names */
179 { NULL
, NULL
}, /* debug_aranges */
184 bf_notfound_complaint (void)
186 complaint (_("line numbers off, `.bf' symbol not found"));
190 ef_complaint (int arg1
)
192 complaint (_("Mismatched .ef symbol ignored starting at symnum %d"), arg1
);
196 eb_complaint (int arg1
)
198 complaint (_("Mismatched .eb symbol ignored starting at symnum %d"), arg1
);
201 static void xcoff_initial_scan (struct objfile
*, symfile_add_flags
);
203 static void scan_xcoff_symtab (minimal_symbol_reader
&,
206 static const char *xcoff_next_symbol_text (struct objfile
*);
208 static void record_include_begin (struct coff_symbol
*);
211 enter_line_range (struct subfile
*, unsigned, unsigned,
212 CORE_ADDR
, CORE_ADDR
, unsigned *);
214 static void init_stringtab (bfd
*, file_ptr
, struct objfile
*);
216 static void xcoff_symfile_init (struct objfile
*);
218 static void xcoff_new_init (struct objfile
*);
220 static void xcoff_symfile_finish (struct objfile
*);
222 static char *coff_getfilename (union internal_auxent
*, struct objfile
*);
224 static void read_symbol (struct internal_syment
*, int);
226 static int read_symbol_lineno (int);
228 static CORE_ADDR
read_symbol_nvalue (int);
230 static struct symbol
*process_xcoff_symbol (struct coff_symbol
*,
233 static void read_xcoff_symtab (struct objfile
*, legacy_psymtab
*);
236 static void add_stab_to_list (char *, struct pending_stabs
**);
239 static struct linetable
*arrange_linetable (struct linetable
*);
241 static void record_include_end (struct coff_symbol
*);
243 static void process_linenos (CORE_ADDR
, CORE_ADDR
);
246 /* Translate from a COFF section number (target_index) to a SECT_OFF_*
248 static int secnum_to_section (int, struct objfile
*);
249 static asection
*secnum_to_bfd_section (int, struct objfile
*);
251 struct find_targ_sec_arg
256 struct objfile
*objfile
;
259 static void find_targ_sec (bfd
*, asection
*, void *);
262 find_targ_sec (bfd
*abfd
, asection
*sect
, void *obj
)
264 struct find_targ_sec_arg
*args
= (struct find_targ_sec_arg
*) obj
;
265 struct objfile
*objfile
= args
->objfile
;
267 if (sect
->target_index
== args
->targ_index
)
269 /* This is the section. Figure out what SECT_OFF_* code it is. */
270 if (bfd_section_flags (sect
) & SEC_CODE
)
271 *args
->resultp
= SECT_OFF_TEXT (objfile
);
272 else if (bfd_section_flags (sect
) & SEC_LOAD
)
273 *args
->resultp
= SECT_OFF_DATA (objfile
);
275 *args
->resultp
= gdb_bfd_section_index (abfd
, sect
);
276 *args
->bfd_sect
= sect
;
280 /* Search all BFD sections for the section whose target_index is
281 equal to N_SCNUM. Set *BFD_SECT to that section. The section's
282 associated index in the objfile's section_offset table is also
285 If no match is found, *BFD_SECT is set to NULL, and *SECNUM
286 is set to the text section's number. */
289 xcoff_secnum_to_sections (int n_scnum
, struct objfile
*objfile
,
290 asection
**bfd_sect
, int *secnum
)
292 struct find_targ_sec_arg args
;
294 args
.targ_index
= n_scnum
;
295 args
.resultp
= secnum
;
296 args
.bfd_sect
= bfd_sect
;
297 args
.objfile
= objfile
;
300 *secnum
= SECT_OFF_TEXT (objfile
);
302 bfd_map_over_sections (objfile
->obfd
, find_targ_sec
, &args
);
305 /* Return the section number (SECT_OFF_*) that N_SCNUM points to. */
308 secnum_to_section (int n_scnum
, struct objfile
*objfile
)
313 xcoff_secnum_to_sections (n_scnum
, objfile
, &ignored
, &secnum
);
317 /* Return the BFD section that N_SCNUM points to. */
320 secnum_to_bfd_section (int n_scnum
, struct objfile
*objfile
)
325 xcoff_secnum_to_sections (n_scnum
, objfile
, &bfd_sect
, &ignored
);
329 /* add a given stab string into given stab vector. */
334 add_stab_to_list (char *stabname
, struct pending_stabs
**stabvector
)
336 if (*stabvector
== NULL
)
338 *stabvector
= (struct pending_stabs
*)
339 xmalloc (sizeof (struct pending_stabs
) +
340 INITIAL_STABVECTOR_LENGTH
* sizeof (char *));
341 (*stabvector
)->count
= 0;
342 (*stabvector
)->length
= INITIAL_STABVECTOR_LENGTH
;
344 else if ((*stabvector
)->count
>= (*stabvector
)->length
)
346 (*stabvector
)->length
+= INITIAL_STABVECTOR_LENGTH
;
347 *stabvector
= (struct pending_stabs
*)
348 xrealloc ((char *) *stabvector
, sizeof (struct pending_stabs
) +
349 (*stabvector
)->length
* sizeof (char *));
351 (*stabvector
)->stab
[(*stabvector
)->count
++] = stabname
;
356 /* Linenos are processed on a file-by-file basis.
360 1) xlc (IBM's native c compiler) postpones static function code
361 emission to the end of a compilation unit. This way it can
362 determine if those functions (statics) are needed or not, and
363 can do some garbage collection (I think). This makes line
364 numbers and corresponding addresses unordered, and we end up
365 with a line table like:
382 and that breaks gdb's binary search on line numbers, if the
383 above table is not sorted on line numbers. And that sort
384 should be on function based, since gcc can emit line numbers
387 10 0x100 - for the init/test part of a for stmt.
390 10 0x400 - for the increment part of a for stmt.
392 arrange_linetable() will do this sorting.
394 2) aix symbol table might look like:
396 c_file // beginning of a new file
397 .bi // beginning of include file
398 .ei // end of include file
402 basically, .bi/.ei pairs do not necessarily encapsulate
403 their scope. They need to be recorded, and processed later
404 on when we come the end of the compilation unit.
405 Include table (inclTable) and process_linenos() handle
410 /* Given a line table with function entries are marked, arrange its
411 functions in ascending order and strip off function entry markers
412 and return it in a newly created table. If the old one is good
413 enough, return the old one. */
414 /* FIXME: I think all this stuff can be replaced by just passing
415 sort_linevec = 1 to end_symtab. */
417 static struct linetable
*
418 arrange_linetable (struct linetable
*oldLineTb
)
420 int ii
, jj
, newline
, /* new line count */
421 function_count
; /* # of functions */
423 struct linetable_entry
*fentry
; /* function entry vector */
424 int fentry_size
; /* # of function entries */
425 struct linetable
*newLineTb
; /* new line table */
428 #define NUM_OF_FUNCTIONS 20
430 fentry_size
= NUM_OF_FUNCTIONS
;
431 fentry
= XNEWVEC (struct linetable_entry
, fentry_size
);
433 for (function_count
= 0, ii
= 0; ii
< oldLineTb
->nitems
; ++ii
)
435 if (oldLineTb
->item
[ii
].line
== 0)
436 { /* Function entry found. */
437 if (function_count
>= fentry_size
)
438 { /* Make sure you have room. */
440 fentry
= (struct linetable_entry
*)
442 fentry_size
* sizeof (struct linetable_entry
));
444 fentry
[function_count
].line
= ii
;
445 fentry
[function_count
].pc
= oldLineTb
->item
[ii
].pc
;
448 /* If the function was compiled with XLC, we may have to add an
449 extra line entry later. Reserve space for that. */
450 if (ii
+ 1 < oldLineTb
->nitems
451 && oldLineTb
->item
[ii
].pc
!= oldLineTb
->item
[ii
+ 1].pc
)
456 if (function_count
== 0)
461 else if (function_count
> 1)
462 std::sort (fentry
, fentry
+ function_count
,
463 [] (const linetable_entry
<e1
, const linetable_entry
& lte2
)
464 { return lte1
.pc
< lte2
.pc
; });
466 /* Allocate a new line table. */
467 newLineTb
= (struct linetable
*)
469 (sizeof (struct linetable
) +
470 (oldLineTb
->nitems
- function_count
+ extra_lines
) * sizeof (struct linetable_entry
));
472 /* If line table does not start with a function beginning, copy up until
476 if (oldLineTb
->item
[0].line
!= 0)
478 newline
< oldLineTb
->nitems
&& oldLineTb
->item
[newline
].line
; ++newline
)
479 newLineTb
->item
[newline
] = oldLineTb
->item
[newline
];
481 /* Now copy function lines one by one. */
483 for (ii
= 0; ii
< function_count
; ++ii
)
485 /* If the function was compiled with XLC, we may have to add an
486 extra line to cover the function prologue. */
487 jj
= fentry
[ii
].line
;
488 if (jj
+ 1 < oldLineTb
->nitems
489 && oldLineTb
->item
[jj
].pc
!= oldLineTb
->item
[jj
+ 1].pc
)
491 newLineTb
->item
[newline
] = oldLineTb
->item
[jj
];
492 newLineTb
->item
[newline
].line
= oldLineTb
->item
[jj
+ 1].line
;
496 for (jj
= fentry
[ii
].line
+ 1;
497 jj
< oldLineTb
->nitems
&& oldLineTb
->item
[jj
].line
!= 0;
499 newLineTb
->item
[newline
] = oldLineTb
->item
[jj
];
502 /* The number of items in the line table must include these
503 extra lines which were added in case of XLC compiled functions. */
504 newLineTb
->nitems
= oldLineTb
->nitems
- function_count
+ extra_lines
;
508 /* include file support: C_BINCL/C_EINCL pairs will be kept in the
509 following `IncludeChain'. At the end of each symtab (end_symtab),
510 we will determine if we should create additional symtab's to
511 represent if (the include files. */
514 typedef struct _inclTable
516 char *name
; /* include filename */
518 /* Offsets to the line table. end points to the last entry which is
519 part of this include file. */
522 struct subfile
*subfile
;
523 unsigned funStartLine
; /* Start line # of its function. */
527 #define INITIAL_INCLUDE_TABLE_LENGTH 20
528 static InclTable
*inclTable
; /* global include table */
529 static int inclIndx
; /* last entry to table */
530 static int inclLength
; /* table length */
531 static int inclDepth
; /* nested include depth */
533 static void allocate_include_entry (void);
536 record_include_begin (struct coff_symbol
*cs
)
540 /* In xcoff, we assume include files cannot be nested (not in .c files
541 of course, but in corresponding .s files.). */
543 /* This can happen with old versions of GCC.
544 GCC 2.3.3-930426 does not exhibit this on a test case which
545 a user said produced the message for him. */
546 complaint (_("Nested C_BINCL symbols"));
550 allocate_include_entry ();
552 inclTable
[inclIndx
].name
= cs
->c_name
;
553 inclTable
[inclIndx
].begin
= cs
->c_value
;
557 record_include_end (struct coff_symbol
*cs
)
563 complaint (_("Mismatched C_BINCL/C_EINCL pair"));
566 allocate_include_entry ();
568 pTbl
= &inclTable
[inclIndx
];
569 pTbl
->end
= cs
->c_value
;
576 allocate_include_entry (void)
578 if (inclTable
== NULL
)
580 inclTable
= XCNEWVEC (InclTable
, INITIAL_INCLUDE_TABLE_LENGTH
);
581 inclLength
= INITIAL_INCLUDE_TABLE_LENGTH
;
584 else if (inclIndx
>= inclLength
)
586 inclLength
+= INITIAL_INCLUDE_TABLE_LENGTH
;
587 inclTable
= XRESIZEVEC (InclTable
, inclTable
, inclLength
);
588 memset (inclTable
+ inclLength
- INITIAL_INCLUDE_TABLE_LENGTH
,
589 '\0', sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
593 /* Global variable to pass the psymtab down to all the routines involved
594 in psymtab to symtab processing. */
595 static legacy_psymtab
*this_symtab_psymtab
;
597 /* Objfile related to this_symtab_psymtab; set at the same time. */
598 static struct objfile
*this_symtab_objfile
;
600 /* given the start and end addresses of a compilation unit (or a csect,
601 at times) process its lines and create appropriate line vectors. */
604 process_linenos (CORE_ADDR start
, CORE_ADDR end
)
608 = XCOFF_DATA (this_symtab_objfile
)->max_lineno_offset
;
610 /* subfile structure for the main compilation unit. */
611 struct subfile main_subfile
;
613 /* In the main source file, any time we see a function entry, we
614 reset this variable to function's absolute starting line number.
615 All the following line numbers in the function are relative to
616 this, and we record absolute line numbers in record_line(). */
618 unsigned int main_source_baseline
= 0;
623 ((struct symloc
*) this_symtab_psymtab
->read_symtab_private
)->lineno_off
;
625 goto return_after_cleanup
;
627 memset (&main_subfile
, '\0', sizeof (main_subfile
));
630 /* All source lines were in the main source file. None in include
633 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
634 &main_source_baseline
);
638 /* There was source with line numbers in include files. */
641 coff_data (this_symtab_objfile
->obfd
)->local_linesz
;
642 main_source_baseline
= 0;
644 for (ii
= 0; ii
< inclIndx
; ++ii
)
646 struct subfile
*tmpSubfile
;
648 /* If there is main file source before include file, enter it. */
649 if (offset
< inclTable
[ii
].begin
)
652 (&main_subfile
, offset
, inclTable
[ii
].begin
- linesz
,
653 start
, 0, &main_source_baseline
);
656 if (strcmp (inclTable
[ii
].name
, get_last_source_file ()) == 0)
658 /* The entry in the include table refers to the main source
659 file. Add the lines to the main subfile. */
661 main_source_baseline
= inclTable
[ii
].funStartLine
;
663 (&main_subfile
, inclTable
[ii
].begin
, inclTable
[ii
].end
,
664 start
, 0, &main_source_baseline
);
665 inclTable
[ii
].subfile
= &main_subfile
;
669 /* Have a new subfile for the include file. */
671 tmpSubfile
= inclTable
[ii
].subfile
= XNEW (struct subfile
);
673 memset (tmpSubfile
, '\0', sizeof (struct subfile
));
674 firstLine
= &(inclTable
[ii
].funStartLine
);
676 /* Enter include file's lines now. */
677 enter_line_range (tmpSubfile
, inclTable
[ii
].begin
,
678 inclTable
[ii
].end
, start
, 0, firstLine
);
681 if (offset
<= inclTable
[ii
].end
)
682 offset
= inclTable
[ii
].end
+ linesz
;
685 /* All the include files' line have been processed at this point. Now,
686 enter remaining lines of the main file, if any left. */
687 if (offset
< max_offset
+ 1 - linesz
)
689 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
690 &main_source_baseline
);
694 /* Process main file's line numbers. */
695 if (main_subfile
.line_vector
)
697 struct linetable
*lineTb
, *lv
;
699 lv
= main_subfile
.line_vector
;
701 /* Line numbers are not necessarily ordered. xlc compilation will
702 put static function to the end. */
704 struct subfile
*current_subfile
= get_current_subfile ();
705 lineTb
= arrange_linetable (lv
);
708 current_subfile
->line_vector
= (struct linetable
*)
709 xrealloc (lv
, (sizeof (struct linetable
)
710 + lv
->nitems
* sizeof (struct linetable_entry
)));
715 current_subfile
->line_vector
= lineTb
;
718 current_subfile
->line_vector_length
=
719 current_subfile
->line_vector
->nitems
;
722 /* Now, process included files' line numbers. */
724 for (ii
= 0; ii
< inclIndx
; ++ii
)
726 if (inclTable
[ii
].subfile
!= ((struct subfile
*) &main_subfile
)
727 && (inclTable
[ii
].subfile
)->line_vector
) /* Useless if!!!
730 struct linetable
*lineTb
, *lv
;
732 lv
= (inclTable
[ii
].subfile
)->line_vector
;
734 /* Line numbers are not necessarily ordered. xlc compilation will
735 put static function to the end. */
737 lineTb
= arrange_linetable (lv
);
741 /* For the same include file, we might want to have more than one
742 subfile. This happens if we have something like:
750 while foo.h including code in it. (stupid but possible)
751 Since start_subfile() looks at the name and uses an
752 existing one if finds, we need to provide a fake name and
756 start_subfile (inclTable
[ii
].name
);
759 /* Pick a fake name that will produce the same results as this
760 one when passed to deduce_language_from_filename. Kludge on
762 const char *fakename
= strrchr (inclTable
[ii
].name
, '.');
764 if (fakename
== NULL
)
766 start_subfile (fakename
);
767 xfree (get_current_subfile ()->name
);
769 struct subfile
*current_subfile
= get_current_subfile ();
770 current_subfile
->name
= xstrdup (inclTable
[ii
].name
);
775 current_subfile
->line_vector
=
776 (struct linetable
*) xrealloc
777 (lv
, (sizeof (struct linetable
)
778 + lv
->nitems
* sizeof (struct linetable_entry
)));
784 current_subfile
->line_vector
= lineTb
;
787 current_subfile
->line_vector_length
=
788 current_subfile
->line_vector
->nitems
;
789 start_subfile (pop_subfile ());
793 return_after_cleanup
:
795 /* We don't want to keep alloc/free'ing the global include file table. */
800 aix_process_linenos (struct objfile
*objfile
)
802 /* There is no linenos to read if there are only dwarf info. */
803 if (this_symtab_psymtab
== NULL
)
806 /* Process line numbers and enter them into line vector. */
807 process_linenos (get_last_source_start_addr (), cur_src_end_addr
);
811 /* Enter a given range of lines into the line vector.
812 can be called in the following two ways:
813 enter_line_range (subfile, beginoffset, endoffset,
814 startaddr, 0, firstLine) or
815 enter_line_range (subfile, beginoffset, 0,
816 startaddr, endaddr, firstLine)
818 endoffset points to the last line table entry that we should pay
822 enter_line_range (struct subfile
*subfile
, unsigned beginoffset
,
823 unsigned endoffset
, /* offsets to line table */
824 CORE_ADDR startaddr
, /* offsets to line table */
825 CORE_ADDR endaddr
, unsigned *firstLine
)
827 struct objfile
*objfile
= this_symtab_objfile
;
828 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
829 unsigned int curoffset
;
832 struct internal_lineno int_lnno
;
833 unsigned int limit_offset
;
837 if (endoffset
== 0 && startaddr
== 0 && endaddr
== 0)
839 curoffset
= beginoffset
;
840 limit_offset
= XCOFF_DATA (objfile
)->max_lineno_offset
;
844 if (endoffset
>= limit_offset
)
846 complaint (_("Bad line table offset in C_EINCL directive"));
849 limit_offset
= endoffset
;
854 abfd
= objfile
->obfd
;
855 linesz
= coff_data (abfd
)->local_linesz
;
856 ext_lnno
= alloca (linesz
);
858 while (curoffset
<= limit_offset
)
860 bfd_seek (abfd
, curoffset
, SEEK_SET
);
861 bfd_bread (ext_lnno
, linesz
, abfd
);
862 bfd_coff_swap_lineno_in (abfd
, ext_lnno
, &int_lnno
);
864 /* Find the address this line represents. */
865 addr
= (int_lnno
.l_lnno
866 ? int_lnno
.l_addr
.l_paddr
867 : read_symbol_nvalue (int_lnno
.l_addr
.l_symndx
));
868 addr
+= objfile
->text_section_offset ();
870 if (addr
< startaddr
|| (endaddr
&& addr
>= endaddr
))
873 if (int_lnno
.l_lnno
== 0)
875 *firstLine
= read_symbol_lineno (int_lnno
.l_addr
.l_symndx
);
876 record_line (subfile
, 0, gdbarch_addr_bits_remove (gdbarch
, addr
));
880 record_line (subfile
, *firstLine
+ int_lnno
.l_lnno
,
881 gdbarch_addr_bits_remove (gdbarch
, addr
));
887 /* Save the vital information for use when closing off the current file.
888 NAME is the file name the symbols came from, START_ADDR is the first
889 text address for the file, and SIZE is the number of bytes of text. */
891 #define complete_symtab(name, start_addr) { \
892 set_last_source_file (name); \
893 set_last_source_start_addr (start_addr); \
897 /* Refill the symbol table input buffer
898 and set the variables that control fetching entries from it.
899 Reports an error if no data available.
900 This function can read past the end of the symbol table
901 (into the string table) but this does no harm. */
903 /* Create a new minimal symbol (using record_with_info).
905 Creation of all new minimal symbols should go through this function
906 rather than calling the various record functions in order
907 to make sure that all symbol addresses get properly relocated.
911 NAME - the symbol's name (but if NAME starts with a period, that
912 leading period is discarded).
913 ADDRESS - the symbol's address, prior to relocation. This function
914 relocates the address before recording the minimal symbol.
915 MS_TYPE - the symbol's type.
916 N_SCNUM - the symbol's XCOFF section number.
917 OBJFILE - the objfile associated with the minimal symbol. */
920 record_minimal_symbol (minimal_symbol_reader
&reader
,
921 const char *name
, CORE_ADDR address
,
922 enum minimal_symbol_type ms_type
,
924 struct objfile
*objfile
)
929 reader
.record_with_info (name
, address
, ms_type
,
930 secnum_to_section (n_scnum
, objfile
));
933 /* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be
934 nested. At any given time, a symbol can only be in one static block.
935 This is the base address of current static block, zero if non exists. */
937 static int static_block_base
= 0;
939 /* Section number for the current static block. */
941 static int static_block_section
= -1;
943 /* true if space for symbol name has been allocated. */
945 static int symname_alloced
= 0;
947 /* Next symbol to read. Pointer into raw seething symbol table. */
949 static char *raw_symbol
;
951 /* This is the function which stabsread.c calls to get symbol
955 xcoff_next_symbol_text (struct objfile
*objfile
)
957 struct internal_syment symbol
;
960 /* FIXME: is this the same as the passed arg? */
961 if (this_symtab_objfile
)
962 objfile
= this_symtab_objfile
;
964 bfd_coff_swap_sym_in (objfile
->obfd
, raw_symbol
, &symbol
);
967 complaint (_("Unexpected symbol continuation"));
969 /* Return something which points to '\0' and hope the symbol reading
970 code does something reasonable. */
973 else if (symbol
.n_sclass
& 0x80)
975 retval
= XCOFF_DATA (objfile
)->debugsec
+ symbol
.n_offset
;
976 raw_symbol
+= coff_data (objfile
->obfd
)->local_symesz
;
981 complaint (_("Unexpected symbol continuation"));
983 /* Return something which points to '\0' and hope the symbol reading
984 code does something reasonable. */
990 /* Read symbols for a given partial symbol table. */
993 read_xcoff_symtab (struct objfile
*objfile
, legacy_psymtab
*pst
)
995 bfd
*abfd
= objfile
->obfd
;
996 char *raw_auxptr
; /* Pointer to first raw aux entry for sym. */
997 struct xcoff_symfile_info
*xcoff
= XCOFF_DATA (objfile
);
998 char *strtbl
= xcoff
->strtbl
;
999 char *debugsec
= xcoff
->debugsec
;
1000 const char *debugfmt
= bfd_xcoff_is_xcoff64 (abfd
) ? "XCOFF64" : "XCOFF";
1002 struct internal_syment symbol
[1];
1003 union internal_auxent main_aux
;
1004 struct coff_symbol cs
[1];
1005 CORE_ADDR file_start_addr
= 0;
1006 CORE_ADDR file_end_addr
= 0;
1008 int next_file_symnum
= -1;
1009 unsigned int max_symnum
;
1010 int just_started
= 1;
1012 CORE_ADDR fcn_start_addr
= 0;
1013 enum language pst_symtab_language
;
1015 struct coff_symbol fcn_stab_saved
= { 0 };
1017 /* fcn_cs_saved is global because process_xcoff_symbol needs it. */
1018 union internal_auxent fcn_aux_saved
= main_aux
;
1019 struct context_stack
*newobj
;
1021 const char *filestring
= pst
->filename
; /* Name of the current file. */
1023 const char *last_csect_name
; /* Last seen csect's name. */
1025 this_symtab_psymtab
= pst
;
1026 this_symtab_objfile
= objfile
;
1028 /* Get the appropriate COFF "constants" related to the file we're
1030 local_symesz
= coff_data (abfd
)->local_symesz
;
1032 set_last_source_file (NULL
);
1033 last_csect_name
= 0;
1034 pst_symtab_language
= deduce_language_from_filename (filestring
);
1037 start_symtab (objfile
, filestring
, NULL
, file_start_addr
,
1038 pst_symtab_language
);
1039 record_debugformat (debugfmt
);
1040 symnum
= ((struct symloc
*) pst
->read_symtab_private
)->first_symnum
;
1042 symnum
+ ((struct symloc
*) pst
->read_symtab_private
)->numsyms
;
1043 first_object_file_end
= 0;
1045 raw_symbol
= xcoff
->symtbl
+ symnum
* local_symesz
;
1047 while (symnum
< max_symnum
)
1049 QUIT
; /* make this command interruptable. */
1051 /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */
1052 /* read one symbol into `cs' structure. After processing the
1053 whole symbol table, only string table will be kept in memory,
1054 symbol table and debug section of xcoff will be freed. Thus
1055 we can mark symbols with names in string table as
1060 /* Swap and align the symbol into a reasonable C structure. */
1061 bfd_coff_swap_sym_in (abfd
, raw_symbol
, symbol
);
1063 cs
->c_symnum
= symnum
;
1064 cs
->c_naux
= symbol
->n_numaux
;
1065 if (symbol
->n_zeroes
)
1067 symname_alloced
= 0;
1068 /* We must use the original, unswapped, name here so the name field
1069 pointed to by cs->c_name will persist throughout xcoffread. If
1070 we use the new field, it gets overwritten for each symbol. */
1071 cs
->c_name
= ((struct external_syment
*) raw_symbol
)->e
.e_name
;
1072 /* If it's exactly E_SYMNMLEN characters long it isn't
1074 if (cs
->c_name
[E_SYMNMLEN
- 1] != '\0')
1078 p
= (char *) obstack_alloc (&objfile
->objfile_obstack
,
1080 strncpy (p
, cs
->c_name
, E_SYMNMLEN
);
1081 p
[E_SYMNMLEN
] = '\0';
1083 symname_alloced
= 1;
1086 else if (symbol
->n_sclass
& 0x80)
1088 cs
->c_name
= debugsec
+ symbol
->n_offset
;
1089 symname_alloced
= 0;
1093 /* in string table */
1094 cs
->c_name
= strtbl
+ (int) symbol
->n_offset
;
1095 symname_alloced
= 1;
1097 cs
->c_value
= symbol
->n_value
;
1098 cs
->c_sclass
= symbol
->n_sclass
;
1099 cs
->c_secnum
= symbol
->n_scnum
;
1100 cs
->c_type
= (unsigned) symbol
->n_type
;
1102 raw_symbol
+= local_symesz
;
1105 /* Save addr of first aux entry. */
1106 raw_auxptr
= raw_symbol
;
1108 /* Skip all the auxents associated with this symbol. */
1109 for (ii
= symbol
->n_numaux
; ii
; --ii
)
1111 raw_symbol
+= coff_data (abfd
)->local_auxesz
;
1116 /* if symbol name starts with ".$" or "$", ignore it. */
1117 if (cs
->c_name
[0] == '$'
1118 || (cs
->c_name
[1] == '$' && cs
->c_name
[0] == '.'))
1121 if (cs
->c_symnum
== next_file_symnum
&& cs
->c_sclass
!= C_FILE
)
1123 if (get_last_source_file ())
1125 pst
->compunit_symtab
= end_symtab (cur_src_end_addr
,
1126 SECT_OFF_TEXT (objfile
));
1131 start_symtab (objfile
, "_globals_", NULL
,
1132 0, pst_symtab_language
);
1133 record_debugformat (debugfmt
);
1134 cur_src_end_addr
= first_object_file_end
;
1135 /* Done with all files, everything from here on is globals. */
1138 if (cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_HIDEXT
||
1139 cs
->c_sclass
== C_WEAKEXT
)
1141 /* Dealing with a symbol with a csect entry. */
1143 #define CSECT(PP) ((PP)->x_csect)
1144 #define CSECT_LEN(PP) (CSECT(PP).x_scnlen.l)
1145 #define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp))
1146 #define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp))
1147 #define CSECT_SCLAS(PP) (CSECT(PP).x_smclas)
1149 /* Convert the auxent to something we can access.
1150 XCOFF can have more than one auxiliary entries.
1152 Actual functions will have two auxiliary entries, one to have the
1153 function size and other to have the smtype/smclass (LD/PR).
1155 c_type value of main symbol table will be set only in case of
1156 C_EXT/C_HIDEEXT/C_WEAKEXT storage class symbols.
1157 Bit 10 of type is set if symbol is a function, ie the value is set
1158 to 32(0x20). So we need to read the first function auxiliary entry
1159 which contains the size. */
1160 if (cs
->c_naux
> 1 && ISFCN (cs
->c_type
))
1162 /* a function entry point. */
1164 fcn_start_addr
= cs
->c_value
;
1166 /* save the function header info, which will be used
1167 when `.bf' is seen. */
1170 /* Convert the auxent to something we can access. */
1171 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1172 0, cs
->c_naux
, &fcn_aux_saved
);
1175 /* Read the csect auxiliary header, which is always the last by
1177 bfd_coff_swap_aux_in (abfd
,
1179 + ((coff_data (abfd
)->local_symesz
)
1180 * (cs
->c_naux
- 1)),
1181 cs
->c_type
, cs
->c_sclass
,
1182 cs
->c_naux
- 1, cs
->c_naux
,
1185 switch (CSECT_SMTYP (&main_aux
))
1189 /* Ignore all external references. */
1193 /* A section description. */
1195 switch (CSECT_SCLAS (&main_aux
))
1201 /* A program csect is seen. We have to allocate one
1202 symbol table for each program csect. Normally gdb
1203 prefers one symtab for each source file. In case
1204 of AIX, one source file might include more than one
1205 [PR] csect, and they don't have to be adjacent in
1206 terms of the space they occupy in memory. Thus, one
1207 single source file might get fragmented in the
1208 memory and gdb's file start and end address
1209 approach does not work! GCC (and I think xlc) seem
1210 to put all the code in the unnamed program csect. */
1212 if (last_csect_name
)
1214 complete_symtab (filestring
, file_start_addr
);
1215 cur_src_end_addr
= file_end_addr
;
1216 end_symtab (file_end_addr
, SECT_OFF_TEXT (objfile
));
1219 /* Give all csects for this source file the same
1221 start_symtab (objfile
, filestring
, NULL
,
1222 0, pst_symtab_language
);
1223 record_debugformat (debugfmt
);
1226 /* If this is the very first csect seen,
1227 basically `__start'. */
1230 first_object_file_end
1231 = cs
->c_value
+ CSECT_LEN (&main_aux
);
1236 cs
->c_value
+ objfile
->text_section_offset ();
1237 file_end_addr
= file_start_addr
+ CSECT_LEN (&main_aux
);
1239 if (cs
->c_name
&& (cs
->c_name
[0] == '.' || cs
->c_name
[0] == '@'))
1240 last_csect_name
= cs
->c_name
;
1244 /* All other symbols are put into the minimal symbol
1257 /* Ignore the symbol. */
1265 switch (CSECT_SCLAS (&main_aux
))
1267 /* We never really come to this part as this case has been
1268 handled in ISFCN check above.
1269 This and other cases of XTY_LD are kept just for
1275 /* shared library function trampoline code entry point. */
1279 /* The symbols often have the same names as debug symbols for
1280 functions, and confuse lookup_symbol. */
1284 /* xlc puts each variable in a separate csect, so we get
1285 an XTY_SD for each variable. But gcc puts several
1286 variables in a csect, so that each variable only gets
1287 an XTY_LD. This will typically be XMC_RW; I suspect
1288 XMC_RO and XMC_BS might be possible too.
1289 These variables are put in the minimal symbol table
1296 /* Common symbols are put into the minimal symbol table only. */
1304 switch (cs
->c_sclass
)
1308 /* c_value field contains symnum of next .file entry in table
1309 or symnum of first global after last .file. */
1311 next_file_symnum
= cs
->c_value
;
1313 /* Complete symbol table for last object file containing
1314 debugging information. */
1316 /* Whether or not there was a csect in the previous file, we
1317 have to call `end_stabs' and `start_stabs' to reset
1318 type_vector, line_vector, etc. structures. */
1320 complete_symtab (filestring
, file_start_addr
);
1321 cur_src_end_addr
= file_end_addr
;
1322 end_symtab (file_end_addr
, SECT_OFF_TEXT (objfile
));
1325 /* XCOFF, according to the AIX 3.2 documentation, puts the
1326 filename in cs->c_name. But xlc 1.3.0.2 has decided to
1327 do things the standard COFF way and put it in the auxent.
1328 We use the auxent if the symbol is ".file" and an auxent
1329 exists, otherwise use the symbol itself. Simple
1331 if (!strcmp (cs
->c_name
, ".file") && cs
->c_naux
> 0)
1333 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1334 0, cs
->c_naux
, &main_aux
);
1335 filestring
= coff_getfilename (&main_aux
, objfile
);
1338 filestring
= cs
->c_name
;
1341 start_symtab (objfile
, filestring
, NULL
, 0, pst_symtab_language
);
1342 record_debugformat (debugfmt
);
1343 last_csect_name
= 0;
1345 /* reset file start and end addresses. A compilation unit
1346 with no text (only data) should have zero file
1348 file_start_addr
= file_end_addr
= 0;
1352 fcn_stab_saved
= *cs
;
1356 if (strcmp (cs
->c_name
, ".bf") == 0)
1358 CORE_ADDR off
= objfile
->text_section_offset ();
1360 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1361 0, cs
->c_naux
, &main_aux
);
1363 within_function
= 1;
1365 newobj
= push_context (0, fcn_start_addr
+ off
);
1367 newobj
->name
= define_symbol
1368 (fcn_cs_saved
.c_value
+ off
,
1369 fcn_stab_saved
.c_name
, 0, 0, objfile
);
1370 if (newobj
->name
!= NULL
)
1371 SYMBOL_SECTION (newobj
->name
) = SECT_OFF_TEXT (objfile
);
1373 else if (strcmp (cs
->c_name
, ".ef") == 0)
1375 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1376 0, cs
->c_naux
, &main_aux
);
1378 /* The value of .ef is the address of epilogue code;
1379 not useful for gdb. */
1380 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1381 contains number of lines to '}' */
1383 if (outermost_context_p ())
1384 { /* We attempted to pop an empty context stack. */
1385 ef_complaint (cs
->c_symnum
);
1386 within_function
= 0;
1389 struct context_stack cstk
= pop_context ();
1390 /* Stack must be empty now. */
1391 if (!outermost_context_p ())
1393 ef_complaint (cs
->c_symnum
);
1394 within_function
= 0;
1398 finish_block (cstk
.name
, cstk
.old_blocks
,
1399 NULL
, cstk
.start_addr
,
1400 (fcn_cs_saved
.c_value
1401 + fcn_aux_saved
.x_sym
.x_misc
.x_fsize
1402 + objfile
->text_section_offset ()));
1403 within_function
= 0;
1408 /* Begin static block. */
1410 struct internal_syment static_symbol
;
1412 read_symbol (&static_symbol
, cs
->c_value
);
1413 static_block_base
= static_symbol
.n_value
;
1414 static_block_section
=
1415 secnum_to_section (static_symbol
.n_scnum
, objfile
);
1420 /* End of static block. */
1421 static_block_base
= 0;
1422 static_block_section
= -1;
1433 complaint (_("Unrecognized storage class %d."),
1448 /* beginning of include file */
1449 /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted
1450 order. Thus, when wee see them, we might not know enough info
1451 to process them. Thus, we'll be saving them into a table
1452 (inclTable) and postpone their processing. */
1454 record_include_begin (cs
);
1458 /* End of include file. */
1459 /* See the comment after case C_BINCL. */
1460 record_include_end (cs
);
1464 if (strcmp (cs
->c_name
, ".bb") == 0)
1467 newobj
= push_context (depth
,
1469 + objfile
->text_section_offset ()));
1471 else if (strcmp (cs
->c_name
, ".eb") == 0)
1473 if (outermost_context_p ())
1474 { /* We attempted to pop an empty context stack. */
1475 eb_complaint (cs
->c_symnum
);
1478 struct context_stack cstk
= pop_context ();
1479 if (depth
-- != cstk
.depth
)
1481 eb_complaint (cs
->c_symnum
);
1484 if (*get_local_symbols () && !outermost_context_p ())
1486 /* Make a block for the local symbols within. */
1487 finish_block (cstk
.name
,
1488 cstk
.old_blocks
, NULL
,
1491 + objfile
->text_section_offset ()));
1493 *get_local_symbols () = cstk
.locals
;
1498 process_xcoff_symbol (cs
, objfile
);
1503 if (get_last_source_file ())
1505 struct compunit_symtab
*cust
;
1507 complete_symtab (filestring
, file_start_addr
);
1508 cur_src_end_addr
= file_end_addr
;
1509 cust
= end_symtab (file_end_addr
, SECT_OFF_TEXT (objfile
));
1510 /* When reading symbols for the last C_FILE of the objfile, try
1511 to make sure that we set pst->compunit_symtab to the symtab for the
1512 file, not to the _globals_ symtab. I'm not sure whether this
1513 actually works right or when/if it comes up. */
1514 if (pst
->compunit_symtab
== NULL
)
1515 pst
->compunit_symtab
= cust
;
1520 #define SYMBOL_DUP(SYMBOL1, SYMBOL2) \
1521 (SYMBOL2) = new (&objfile->objfile_obstack) symbol (); \
1522 *(SYMBOL2) = *(SYMBOL1);
1525 #define SYMNAME_ALLOC(NAME, ALLOCED) \
1526 ((ALLOCED) ? (NAME) : obstack_strdup (&objfile->objfile_obstack, \
1530 /* process one xcoff symbol. */
1532 static struct symbol
*
1533 process_xcoff_symbol (struct coff_symbol
*cs
, struct objfile
*objfile
)
1535 struct symbol onesymbol
;
1536 struct symbol
*sym
= &onesymbol
;
1537 struct symbol
*sym2
= NULL
;
1543 if (cs
->c_secnum
< 0)
1545 /* The value is a register number, offset within a frame, etc.,
1546 and does not get relocated. */
1552 sec
= secnum_to_section (cs
->c_secnum
, objfile
);
1553 off
= objfile
->section_offsets
[sec
];
1560 initialize_objfile_symbol (sym
);
1562 /* default assumptions */
1563 SET_SYMBOL_VALUE_ADDRESS (sym
, cs
->c_value
+ off
);
1564 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1565 SYMBOL_SECTION (sym
) = secnum_to_section (cs
->c_secnum
, objfile
);
1567 if (ISFCN (cs
->c_type
))
1569 /* At this point, we don't know the type of the function. This
1570 will be patched with the type from its stab entry later on in
1571 patch_block_stabs (), unless the file was compiled without -g. */
1573 sym
->set_linkage_name (SYMNAME_ALLOC (name
, symname_alloced
));
1574 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->nodebug_text_symbol
;
1576 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
1577 SYMBOL_DUP (sym
, sym2
);
1579 if (cs
->c_sclass
== C_EXT
|| C_WEAKEXT
)
1580 add_symbol_to_list (sym2
, get_global_symbols ());
1581 else if (cs
->c_sclass
== C_HIDEXT
|| cs
->c_sclass
== C_STAT
)
1582 add_symbol_to_list (sym2
, get_file_symbols ());
1586 /* In case we can't figure out the type, provide default. */
1587 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->nodebug_data_symbol
;
1589 switch (cs
->c_sclass
)
1592 /* The values of functions and global symbols are now resolved
1593 via the global_sym_chain in stabsread.c. */
1595 if (fcn_cs_saved
.c_sclass
== C_EXT
)
1596 add_stab_to_list (name
, &global_stabs
);
1598 add_stab_to_list (name
, &file_stabs
);
1602 add_stab_to_list (name
, &global_stabs
);
1607 common_block_start (cs
->c_name
, objfile
);
1611 common_block_end (objfile
);
1615 complaint (_("Unexpected storage class: %d"),
1628 sym
= define_symbol (cs
->c_value
+ off
, cs
->c_name
, 0, 0, objfile
);
1631 SYMBOL_SECTION (sym
) = sec
;
1638 /* For xlc (not GCC), the 'V' symbol descriptor is used for
1639 all statics and we need to distinguish file-scope versus
1640 function-scope using within_function. We do this by
1641 changing the string we pass to define_symbol to use 'S'
1642 where we need to, which is not necessarily super-clean,
1643 but seems workable enough. */
1648 pp
= strchr (name
, ':');
1653 if (*pp
== 'V' && !within_function
)
1655 sym
= define_symbol ((cs
->c_value
1656 + objfile
->section_offsets
[static_block_section
]),
1657 cs
->c_name
, 0, 0, objfile
);
1660 SET_SYMBOL_VALUE_ADDRESS (sym
,
1661 SYMBOL_VALUE_ADDRESS (sym
)
1662 + static_block_base
);
1663 SYMBOL_SECTION (sym
) = static_block_section
;
1672 /* Extract the file name from the aux entry of a C_FILE symbol.
1673 Result is in static storage and is only good for temporary use. */
1676 coff_getfilename (union internal_auxent
*aux_entry
, struct objfile
*objfile
)
1678 static char buffer
[BUFSIZ
];
1680 if (aux_entry
->x_file
.x_n
.x_zeroes
== 0)
1681 strcpy (buffer
, (XCOFF_DATA (objfile
)->strtbl
1682 + aux_entry
->x_file
.x_n
.x_offset
));
1685 strncpy (buffer
, aux_entry
->x_file
.x_fname
, FILNMLEN
);
1686 buffer
[FILNMLEN
] = '\0';
1691 /* Set *SYMBOL to symbol number symno in symtbl. */
1693 read_symbol (struct internal_syment
*symbol
, int symno
)
1695 struct xcoff_symfile_info
*xcoff
= XCOFF_DATA (this_symtab_objfile
);
1696 int nsyms
= xcoff
->symtbl_num_syms
;
1697 char *stbl
= xcoff
->symtbl
;
1699 if (symno
< 0 || symno
>= nsyms
)
1701 complaint (_("Invalid symbol offset"));
1702 symbol
->n_value
= 0;
1703 symbol
->n_scnum
= -1;
1706 bfd_coff_swap_sym_in (this_symtab_objfile
->obfd
,
1707 stbl
+ (symno
* local_symesz
),
1711 /* Get value corresponding to symbol number symno in symtbl. */
1714 read_symbol_nvalue (int symno
)
1716 struct internal_syment symbol
[1];
1718 read_symbol (symbol
, symno
);
1719 return symbol
->n_value
;
1723 /* Find the address of the function corresponding to symno, where
1724 symno is the symbol pointed to by the linetable. */
1727 read_symbol_lineno (int symno
)
1729 struct objfile
*objfile
= this_symtab_objfile
;
1730 int xcoff64
= bfd_xcoff_is_xcoff64 (objfile
->obfd
);
1732 struct xcoff_symfile_info
*info
= XCOFF_DATA (objfile
);
1733 int nsyms
= info
->symtbl_num_syms
;
1734 char *stbl
= info
->symtbl
;
1735 char *strtbl
= info
->strtbl
;
1737 struct internal_syment symbol
[1];
1738 union internal_auxent main_aux
[1];
1742 bf_notfound_complaint ();
1746 /* Note that just searching for a short distance (e.g. 50 symbols)
1747 is not enough, at least in the following case.
1750 [many .stabx entries]
1751 [a few functions, referring to foo]
1755 What happens here is that the assembler moves the .stabx entries
1756 to right before the ".bf" for foo, but the symbol for "foo" is before
1757 all the stabx entries. See PR gdb/2222. */
1759 /* Maintaining a table of .bf entries might be preferable to this search.
1760 If I understand things correctly it would need to be done only for
1761 the duration of a single psymtab to symtab conversion. */
1762 while (symno
< nsyms
)
1764 bfd_coff_swap_sym_in (symfile_bfd
,
1765 stbl
+ (symno
* local_symesz
), symbol
);
1766 if (symbol
->n_sclass
== C_FCN
)
1768 char *name
= xcoff64
? strtbl
+ symbol
->n_offset
: symbol
->n_name
;
1770 if (strcmp (name
, ".bf") == 0)
1773 symno
+= symbol
->n_numaux
+ 1;
1776 bf_notfound_complaint ();
1780 /* Take aux entry and return its lineno. */
1782 bfd_coff_swap_aux_in (objfile
->obfd
, stbl
+ symno
* local_symesz
,
1783 symbol
->n_type
, symbol
->n_sclass
,
1784 0, symbol
->n_numaux
, main_aux
);
1786 return main_aux
->x_sym
.x_misc
.x_lnsz
.x_lnno
;
1789 /* Support for line number handling. */
1791 /* This function is called for every section; it finds the outer limits
1792 * of the line table (minimum and maximum file offset) so that the
1793 * mainline code can read the whole thing for efficiency.
1796 find_linenos (struct bfd
*abfd
, struct bfd_section
*asect
, void *vpinfo
)
1798 struct xcoff_symfile_info
*info
;
1800 file_ptr offset
, maxoff
;
1802 count
= asect
->lineno_count
;
1804 if (strcmp (asect
->name
, ".text") != 0 || count
== 0)
1807 size
= count
* coff_data (abfd
)->local_linesz
;
1808 info
= (struct xcoff_symfile_info
*) vpinfo
;
1809 offset
= asect
->line_filepos
;
1810 maxoff
= offset
+ size
;
1812 if (offset
< info
->min_lineno_offset
|| info
->min_lineno_offset
== 0)
1813 info
->min_lineno_offset
= offset
;
1815 if (maxoff
> info
->max_lineno_offset
)
1816 info
->max_lineno_offset
= maxoff
;
1820 xcoff_psymtab_to_symtab_1 (legacy_psymtab
*pst
, struct objfile
*objfile
)
1822 gdb_assert (!pst
->readin
);
1824 /* Read in all partial symtabs on which this one is dependent. */
1825 pst
->read_dependencies (objfile
);
1827 if (((struct symloc
*) pst
->read_symtab_private
)->numsyms
!= 0)
1829 /* Init stuff necessary for reading in symbols. */
1832 scoped_free_pendings free_pending
;
1833 read_xcoff_symtab (objfile
, pst
);
1839 /* Read in all of the symbols for a given psymtab for real.
1840 Be verbose about it if the user wants that. SELF is not NULL. */
1843 xcoff_read_symtab (legacy_psymtab
*self
, struct objfile
*objfile
)
1845 gdb_assert (!self
->readin
);
1847 if (((struct symloc
*) self
->read_symtab_private
)->numsyms
!= 0
1848 || self
->number_of_dependencies
)
1850 next_symbol_text_func
= xcoff_next_symbol_text
;
1852 self
->expand_psymtab (objfile
);
1854 /* Match with global symbols. This only needs to be done once,
1855 after all of the symtabs and dependencies have been read in. */
1856 scan_file_globals (objfile
);
1861 xcoff_new_init (struct objfile
*objfile
)
1863 stabsread_new_init ();
1866 /* Do initialization in preparation for reading symbols from OBJFILE.
1868 We will only be called if this is an XCOFF or XCOFF-like file.
1869 BFD handles figuring out the format of the file, and code in symfile.c
1870 uses BFD's determination to vector to us. */
1873 xcoff_symfile_init (struct objfile
*objfile
)
1875 /* Allocate struct to keep track of the symfile. */
1876 xcoff_objfile_data_key
.emplace (objfile
);
1878 /* XCOFF objects may be reordered, so set OBJF_REORDERED. If we
1879 find this causes a significant slowdown in gdb then we could
1880 set it in the debug symbol readers only when necessary. */
1881 objfile
->flags
|= OBJF_REORDERED
;
1884 /* Perform any local cleanups required when we are done with a particular
1885 objfile. I.E, we are in the process of discarding all symbol information
1886 for an objfile, freeing up all memory held for it, and unlinking the
1887 objfile struct from the global list of known objfiles. */
1890 xcoff_symfile_finish (struct objfile
*objfile
)
1892 /* Start with a fresh include table for the next objfile. */
1898 inclIndx
= inclLength
= inclDepth
= 0;
1903 init_stringtab (bfd
*abfd
, file_ptr offset
, struct objfile
*objfile
)
1907 unsigned char lengthbuf
[4];
1909 struct xcoff_symfile_info
*xcoff
= XCOFF_DATA (objfile
);
1911 xcoff
->strtbl
= NULL
;
1913 if (bfd_seek (abfd
, offset
, SEEK_SET
) < 0)
1914 error (_("cannot seek to string table in %s: %s"),
1915 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1917 val
= bfd_bread ((char *) lengthbuf
, sizeof lengthbuf
, abfd
);
1918 length
= bfd_h_get_32 (abfd
, lengthbuf
);
1920 /* If no string table is needed, then the file may end immediately
1921 after the symbols. Just return with `strtbl' set to NULL. */
1923 if (val
!= sizeof lengthbuf
|| length
< sizeof lengthbuf
)
1926 /* Allocate string table from objfile_obstack. We will need this table
1927 as long as we have its symbol table around. */
1929 strtbl
= (char *) obstack_alloc (&objfile
->objfile_obstack
, length
);
1930 xcoff
->strtbl
= strtbl
;
1932 /* Copy length buffer, the first byte is usually zero and is
1933 used for stabs with a name length of zero. */
1934 memcpy (strtbl
, lengthbuf
, sizeof lengthbuf
);
1935 if (length
== sizeof lengthbuf
)
1938 val
= bfd_bread (strtbl
+ sizeof lengthbuf
, length
- sizeof lengthbuf
, abfd
);
1940 if (val
!= length
- sizeof lengthbuf
)
1941 error (_("cannot read string table from %s: %s"),
1942 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1943 if (strtbl
[length
- 1] != '\0')
1944 error (_("bad symbol file: string table "
1945 "does not end with null character"));
1950 /* If we have not yet seen a function for this psymtab, this is 0. If we
1951 have seen one, it is the offset in the line numbers of the line numbers
1953 static unsigned int first_fun_line_offset
;
1955 /* Allocate and partially fill a partial symtab. It will be
1956 completely filled at the end of the symbol list.
1958 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
1959 is the address relative to which its symbols are (incremental) or 0
1962 static legacy_psymtab
*
1963 xcoff_start_psymtab (struct objfile
*objfile
,
1964 const char *filename
, int first_symnum
)
1966 /* We fill in textlow later. */
1967 legacy_psymtab
*result
= new legacy_psymtab (filename
, objfile
, 0);
1969 result
->read_symtab_private
=
1970 XOBNEW (&objfile
->objfile_obstack
, struct symloc
);
1971 ((struct symloc
*) result
->read_symtab_private
)->first_symnum
= first_symnum
;
1972 result
->legacy_read_symtab
= xcoff_read_symtab
;
1973 result
->legacy_expand_psymtab
= xcoff_psymtab_to_symtab_1
;
1975 /* Deduce the source language from the filename for this psymtab. */
1976 psymtab_language
= deduce_language_from_filename (filename
);
1981 /* Close off the current usage of PST.
1982 Returns PST, or NULL if the partial symtab was empty and thrown away.
1984 CAPPING_SYMBOL_NUMBER is the end of pst (exclusive).
1986 INCLUDE_LIST, NUM_INCLUDES, DEPENDENCY_LIST, and NUMBER_DEPENDENCIES
1987 are the information for includes and dependencies. */
1989 static legacy_psymtab
*
1990 xcoff_end_psymtab (struct objfile
*objfile
, legacy_psymtab
*pst
,
1991 const char **include_list
, int num_includes
,
1992 int capping_symbol_number
,
1993 legacy_psymtab
**dependency_list
,
1994 int number_dependencies
, int textlow_not_set
)
1998 if (capping_symbol_number
!= -1)
1999 ((struct symloc
*) pst
->read_symtab_private
)->numsyms
=
2000 capping_symbol_number
2001 - ((struct symloc
*) pst
->read_symtab_private
)->first_symnum
;
2002 ((struct symloc
*) pst
->read_symtab_private
)->lineno_off
=
2003 first_fun_line_offset
;
2004 first_fun_line_offset
= 0;
2006 end_psymtab_common (objfile
, pst
);
2008 pst
->number_of_dependencies
= number_dependencies
;
2009 if (number_dependencies
)
2012 = objfile
->partial_symtabs
->allocate_dependencies (number_dependencies
);
2013 memcpy (pst
->dependencies
, dependency_list
,
2014 number_dependencies
* sizeof (legacy_psymtab
*));
2017 pst
->dependencies
= 0;
2019 for (i
= 0; i
< num_includes
; i
++)
2021 legacy_psymtab
*subpst
=
2022 new legacy_psymtab (include_list
[i
], objfile
);
2024 subpst
->read_symtab_private
= XOBNEW (&objfile
->objfile_obstack
, symloc
);
2025 ((struct symloc
*) subpst
->read_symtab_private
)->first_symnum
= 0;
2026 ((struct symloc
*) subpst
->read_symtab_private
)->numsyms
= 0;
2028 /* We could save slight bits of space by only making one of these,
2029 shared by the entire set of include files. FIXME-someday. */
2030 subpst
->dependencies
=
2031 objfile
->partial_symtabs
->allocate_dependencies (1);
2032 subpst
->dependencies
[0] = pst
;
2033 subpst
->number_of_dependencies
= 1;
2035 subpst
->legacy_read_symtab
= pst
->legacy_read_symtab
;
2036 subpst
->legacy_expand_psymtab
= pst
->legacy_expand_psymtab
;
2039 if (num_includes
== 0
2040 && number_dependencies
== 0
2041 && pst
->n_global_syms
== 0
2042 && pst
->n_static_syms
== 0)
2044 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2045 it is on the obstack, but we can forget to chain it on the list. */
2046 /* Empty psymtabs happen as a result of header files which don't have
2047 any symbols in them. There can be a lot of them. */
2049 discard_psymtab (objfile
, pst
);
2051 /* Indicate that psymtab was thrown away. */
2057 /* Swap raw symbol at *RAW and put the name in *NAME, the symbol in
2058 *SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over
2059 the symbol and its auxents. */
2062 swap_sym (struct internal_syment
*symbol
, union internal_auxent
*aux
,
2063 const char **name
, char **raw
, unsigned int *symnump
,
2064 struct objfile
*objfile
)
2066 bfd_coff_swap_sym_in (objfile
->obfd
, *raw
, symbol
);
2067 if (symbol
->n_zeroes
)
2069 /* If it's exactly E_SYMNMLEN characters long it isn't
2071 if (symbol
->n_name
[E_SYMNMLEN
- 1] != '\0')
2073 /* FIXME: wastes memory for symbols which we don't end up putting
2074 into the minimal symbols. */
2077 p
= (char *) obstack_alloc (&objfile
->objfile_obstack
,
2079 strncpy (p
, symbol
->n_name
, E_SYMNMLEN
);
2080 p
[E_SYMNMLEN
] = '\0';
2084 /* Point to the unswapped name as that persists as long as the
2086 *name
= ((struct external_syment
*) *raw
)->e
.e_name
;
2088 else if (symbol
->n_sclass
& 0x80)
2090 *name
= XCOFF_DATA (objfile
)->debugsec
+ symbol
->n_offset
;
2094 *name
= XCOFF_DATA (objfile
)->strtbl
+ symbol
->n_offset
;
2097 *raw
+= coff_data (objfile
->obfd
)->local_symesz
;
2098 if (symbol
->n_numaux
> 0)
2100 bfd_coff_swap_aux_in (objfile
->obfd
, *raw
, symbol
->n_type
,
2101 symbol
->n_sclass
, 0, symbol
->n_numaux
, aux
);
2103 *symnump
+= symbol
->n_numaux
;
2104 *raw
+= coff_data (objfile
->obfd
)->local_symesz
* symbol
->n_numaux
;
2109 function_outside_compilation_unit_complaint (const char *arg1
)
2111 complaint (_("function `%s' appears to be defined "
2112 "outside of all compilation units"),
2117 scan_xcoff_symtab (minimal_symbol_reader
&reader
,
2118 struct objfile
*objfile
)
2120 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2121 CORE_ADDR toc_offset
= 0; /* toc offset value in data section. */
2122 const char *filestring
= NULL
;
2124 const char *namestring
;
2129 /* Current partial symtab */
2130 legacy_psymtab
*pst
;
2132 /* List of current psymtab's include files. */
2133 const char **psymtab_include_list
;
2134 int includes_allocated
;
2137 /* Index within current psymtab dependency list. */
2138 legacy_psymtab
**dependency_list
;
2139 int dependencies_used
, dependencies_allocated
;
2142 struct internal_syment symbol
;
2143 union internal_auxent main_aux
[5];
2144 unsigned int ssymnum
;
2146 const char *last_csect_name
= NULL
; /* Last seen csect's name and value. */
2147 CORE_ADDR last_csect_val
= 0;
2148 int last_csect_sec
= 0;
2149 int misc_func_recorded
= 0; /* true if any misc. function. */
2150 int textlow_not_set
= 1;
2152 pst
= (legacy_psymtab
*) 0;
2154 includes_allocated
= 30;
2156 psymtab_include_list
= (const char **) alloca (includes_allocated
*
2157 sizeof (const char *));
2159 dependencies_allocated
= 30;
2160 dependencies_used
= 0;
2162 (legacy_psymtab
**) alloca (dependencies_allocated
*
2163 sizeof (legacy_psymtab
*));
2165 set_last_source_file (NULL
);
2167 abfd
= objfile
->obfd
;
2168 next_symbol_text_func
= xcoff_next_symbol_text
;
2170 sraw_symbol
= XCOFF_DATA (objfile
)->symtbl
;
2171 nsyms
= XCOFF_DATA (objfile
)->symtbl_num_syms
;
2173 while (ssymnum
< nsyms
)
2179 bfd_coff_swap_sym_in (abfd
, sraw_symbol
, &symbol
);
2180 sclass
= symbol
.n_sclass
;
2188 /* The CSECT auxent--always the last auxent. */
2189 union internal_auxent csect_aux
;
2190 unsigned int symnum_before
= ssymnum
;
2192 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2194 if (symbol
.n_numaux
> 1)
2196 bfd_coff_swap_aux_in
2198 sraw_symbol
- coff_data (abfd
)->local_symesz
,
2201 symbol
.n_numaux
- 1,
2206 csect_aux
= main_aux
[0];
2208 /* If symbol name starts with ".$" or "$", ignore it. */
2209 if (namestring
[0] == '$'
2210 || (namestring
[0] == '.' && namestring
[1] == '$'))
2213 switch (csect_aux
.x_csect
.x_smtyp
& 0x7)
2216 switch (csect_aux
.x_csect
.x_smclas
)
2219 if (last_csect_name
)
2221 /* If no misc. function recorded in the last
2222 seen csect, enter it as a function. This
2223 will take care of functions like strcmp()
2226 if (!misc_func_recorded
)
2228 record_minimal_symbol
2229 (reader
, last_csect_name
, last_csect_val
,
2230 mst_text
, last_csect_sec
, objfile
);
2231 misc_func_recorded
= 1;
2236 /* We have to allocate one psymtab for
2237 each program csect, because their text
2238 sections need not be adjacent. */
2240 (objfile
, pst
, psymtab_include_list
,
2241 includes_used
, symnum_before
, dependency_list
,
2242 dependencies_used
, textlow_not_set
);
2244 dependencies_used
= 0;
2245 /* Give all psymtabs for this source file the same
2247 pst
= xcoff_start_psymtab
2253 /* Activate the misc_func_recorded mechanism for
2254 compiler- and linker-generated CSECTs like ".strcmp"
2256 if (namestring
&& (namestring
[0] == '.'
2257 || namestring
[0] == '@'))
2259 last_csect_name
= namestring
;
2260 last_csect_val
= symbol
.n_value
;
2261 last_csect_sec
= symbol
.n_scnum
;
2266 symbol
.n_value
+ csect_aux
.x_csect
.x_scnlen
.l
;
2268 if (highval
> pst
->raw_text_high ())
2269 pst
->set_text_high (highval
);
2270 if (!pst
->text_low_valid
2271 || symbol
.n_value
< pst
->raw_text_low ())
2272 pst
->set_text_low (symbol
.n_value
);
2274 misc_func_recorded
= 0;
2279 /* Data variables are recorded in the minimal symbol
2280 table, except for section symbols. */
2281 if (*namestring
!= '.')
2282 record_minimal_symbol
2283 (reader
, namestring
, symbol
.n_value
,
2284 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2285 symbol
.n_scnum
, objfile
);
2290 warning (_("More than one XMC_TC0 symbol found."));
2291 toc_offset
= symbol
.n_value
;
2293 /* Make TOC offset relative to start address of
2295 bfd_sect
= secnum_to_bfd_section (symbol
.n_scnum
, objfile
);
2297 toc_offset
-= bfd_section_vma (bfd_sect
);
2301 /* These symbols tell us where the TOC entry for a
2302 variable is, not the variable itself. */
2311 switch (csect_aux
.x_csect
.x_smclas
)
2314 /* A function entry point. */
2316 if (first_fun_line_offset
== 0 && symbol
.n_numaux
> 1)
2317 first_fun_line_offset
=
2318 main_aux
[0].x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
;
2320 record_minimal_symbol
2321 (reader
, namestring
, symbol
.n_value
,
2322 sclass
== C_HIDEXT
? mst_file_text
: mst_text
,
2323 symbol
.n_scnum
, objfile
);
2324 misc_func_recorded
= 1;
2328 /* shared library function trampoline code entry
2331 /* record trampoline code entries as
2332 mst_solib_trampoline symbol. When we lookup mst
2333 symbols, we will choose mst_text over
2334 mst_solib_trampoline. */
2335 record_minimal_symbol
2336 (reader
, namestring
, symbol
.n_value
,
2337 mst_solib_trampoline
, symbol
.n_scnum
, objfile
);
2338 misc_func_recorded
= 1;
2342 /* The symbols often have the same names as
2343 debug symbols for functions, and confuse
2349 /* xlc puts each variable in a separate csect,
2350 so we get an XTY_SD for each variable. But
2351 gcc puts several variables in a csect, so
2352 that each variable only gets an XTY_LD. We
2353 still need to record them. This will
2354 typically be XMC_RW; I suspect XMC_RO and
2355 XMC_BS might be possible too. */
2356 if (*namestring
!= '.')
2357 record_minimal_symbol
2358 (reader
, namestring
, symbol
.n_value
,
2359 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2360 symbol
.n_scnum
, objfile
);
2366 switch (csect_aux
.x_csect
.x_smclas
)
2370 /* Common variables are recorded in the minimal symbol
2371 table, except for section symbols. */
2372 if (*namestring
!= '.')
2373 record_minimal_symbol
2374 (reader
, namestring
, symbol
.n_value
,
2375 sclass
== C_HIDEXT
? mst_file_bss
: mst_bss
,
2376 symbol
.n_scnum
, objfile
);
2388 unsigned int symnum_before
;
2390 symnum_before
= ssymnum
;
2391 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2394 /* See if the last csect needs to be recorded. */
2396 if (last_csect_name
&& !misc_func_recorded
)
2398 /* If no misc. function recorded in the last seen csect, enter
2399 it as a function. This will take care of functions like
2400 strcmp() compiled by xlc. */
2402 record_minimal_symbol (reader
, last_csect_name
, last_csect_val
,
2403 mst_text
, last_csect_sec
, objfile
);
2404 misc_func_recorded
= 1;
2409 xcoff_end_psymtab (objfile
, pst
, psymtab_include_list
,
2410 includes_used
, symnum_before
,
2411 dependency_list
, dependencies_used
,
2414 dependencies_used
= 0;
2416 first_fun_line_offset
= 0;
2418 /* XCOFF, according to the AIX 3.2 documentation, puts the
2419 filename in cs->c_name. But xlc 1.3.0.2 has decided to
2420 do things the standard COFF way and put it in the auxent.
2421 We use the auxent if the symbol is ".file" and an auxent
2422 exists, otherwise use the symbol itself. */
2423 if (!strcmp (namestring
, ".file") && symbol
.n_numaux
> 0)
2425 filestring
= coff_getfilename (&main_aux
[0], objfile
);
2428 filestring
= namestring
;
2430 pst
= xcoff_start_psymtab (objfile
,
2433 last_csect_name
= NULL
;
2439 complaint (_("Storage class %d not recognized during scan"),
2445 /* C_FCN is .bf and .ef symbols. I think it is sufficient
2446 to handle only the C_FUN and C_EXT. */
2460 /* C_EINCL means we are switching back to the main file. But there
2461 is no reason to care; the only thing we want to know about
2462 includes is the names of all the included (.h) files. */
2467 /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be
2471 /* I don't think the name of the common block (as opposed to the
2472 variables within it) is something which is user visible
2480 /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL
2481 so C_LSYM would appear to be only for locals. */
2487 /* We probably could save a few instructions by assuming that
2488 C_LSYM, C_PSYM, etc., never have auxents. */
2489 int naux1
= symbol
.n_numaux
+ 1;
2492 sraw_symbol
+= bfd_coff_symesz (abfd
) * naux1
;
2498 /* Mark down an include file in the current psymtab. */
2499 enum language tmp_language
;
2501 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2504 tmp_language
= deduce_language_from_filename (namestring
);
2506 /* Only change the psymtab's language if we've learned
2507 something useful (eg. tmp_language is not language_unknown).
2508 In addition, to match what start_subfile does, never change
2510 if (tmp_language
!= language_unknown
2511 && (tmp_language
!= language_c
2512 || psymtab_language
!= language_cplus
))
2513 psymtab_language
= tmp_language
;
2515 /* In C++, one may expect the same filename to come round many
2516 times, when code is coming alternately from the main file
2517 and from inline functions in other files. So I check to see
2518 if this is a file we've seen before -- either the main
2519 source file, or a previously included file.
2521 This seems to be a lot of time to be spending on N_SOL, but
2522 things like "break c-exp.y:435" need to work (I
2523 suppose the psymtab_include_list could be hashed or put
2524 in a binary tree, if profiling shows this is a major hog). */
2525 if (pst
&& strcmp (namestring
, pst
->filename
) == 0)
2531 for (i
= 0; i
< includes_used
; i
++)
2532 if (strcmp (namestring
, psymtab_include_list
[i
]) == 0)
2540 psymtab_include_list
[includes_used
++] = namestring
;
2541 if (includes_used
>= includes_allocated
)
2543 const char **orig
= psymtab_include_list
;
2545 psymtab_include_list
= (const char **)
2546 alloca ((includes_allocated
*= 2) *
2547 sizeof (const char *));
2548 memcpy (psymtab_include_list
, orig
,
2549 includes_used
* sizeof (const char *));
2554 /* The value of the C_FUN is not the address of the function (it
2555 appears to be the address before linking), but as long as it
2556 is smaller than the actual address, then find_pc_partial_function
2557 will use the minimal symbols instead. I hope. */
2566 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2569 p
= strchr (namestring
, ':');
2571 continue; /* Not a debugging symbol. */
2573 /* Main processing section for debugging symbols which
2574 the initial read through the symbol tables needs to worry
2575 about. If we reach this point, the symbol which we are
2576 considering is definitely one we are interested in.
2577 p must also contain the (valid) index into the namestring
2578 which indicates the debugging type symbol. */
2583 if (gdbarch_static_transform_name_p (gdbarch
))
2584 namestring
= gdbarch_static_transform_name
2585 (gdbarch
, namestring
);
2587 add_psymbol_to_list (gdb::string_view (namestring
,
2589 true, VAR_DOMAIN
, LOC_STATIC
,
2590 SECT_OFF_DATA (objfile
),
2591 psymbol_placement::STATIC
,
2593 psymtab_language
, objfile
);
2597 /* The addresses in these entries are reported to be
2598 wrong. See the code that reads 'G's for symtabs. */
2599 add_psymbol_to_list (gdb::string_view (namestring
,
2601 true, VAR_DOMAIN
, LOC_STATIC
,
2602 SECT_OFF_DATA (objfile
),
2603 psymbol_placement::GLOBAL
,
2605 psymtab_language
, objfile
);
2609 /* When a 'T' entry is defining an anonymous enum, it
2610 may have a name which is the empty string, or a
2611 single space. Since they're not really defining a
2612 symbol, those shouldn't go in the partial symbol
2613 table. We do pick up the elements of such enums at
2614 'check_enum:', below. */
2615 if (p
>= namestring
+ 2
2616 || (p
== namestring
+ 1
2617 && namestring
[0] != ' '))
2619 add_psymbol_to_list (gdb::string_view (namestring
,
2621 true, STRUCT_DOMAIN
, LOC_TYPEDEF
, -1,
2622 psymbol_placement::STATIC
,
2623 0, psymtab_language
, objfile
);
2626 /* Also a typedef with the same name. */
2627 add_psymbol_to_list (gdb::string_view (namestring
,
2629 true, VAR_DOMAIN
, LOC_TYPEDEF
, -1,
2630 psymbol_placement::STATIC
,
2631 0, psymtab_language
, objfile
);
2638 if (p
!= namestring
) /* a name is there, not just :T... */
2640 add_psymbol_to_list (gdb::string_view (namestring
,
2642 true, VAR_DOMAIN
, LOC_TYPEDEF
, -1,
2643 psymbol_placement::STATIC
,
2644 0, psymtab_language
, objfile
);
2647 /* If this is an enumerated type, we need to
2648 add all the enum constants to the partial symbol
2649 table. This does not cover enums without names, e.g.
2650 "enum {a, b} c;" in C, but fortunately those are
2651 rare. There is no way for GDB to find those from the
2652 enum type without spending too much time on it. Thus
2653 to solve this problem, the compiler needs to put out the
2654 enum in a nameless type. GCC2 does this. */
2656 /* We are looking for something of the form
2657 <name> ":" ("t" | "T") [<number> "="] "e"
2658 {<constant> ":" <value> ","} ";". */
2660 /* Skip over the colon and the 't' or 'T'. */
2662 /* This type may be given a number. Also, numbers can come
2663 in pairs like (0,26). Skip over it. */
2664 while ((*p
>= '0' && *p
<= '9')
2665 || *p
== '(' || *p
== ',' || *p
== ')'
2671 /* The aix4 compiler emits extra crud before the
2675 /* Skip over the type (?). */
2679 /* Skip over the colon. */
2683 /* We have found an enumerated type. */
2684 /* According to comments in read_enum_type
2685 a comma could end it instead of a semicolon.
2686 I don't know where that happens.
2688 while (*p
&& *p
!= ';' && *p
!= ',')
2692 /* Check for and handle cretinous dbx symbol name
2694 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
2695 p
= next_symbol_text (objfile
);
2697 /* Point to the character after the name
2698 of the enum constant. */
2699 for (q
= p
; *q
&& *q
!= ':'; q
++)
2701 /* Note that the value doesn't matter for
2702 enum constants in psymtabs, just in symtabs. */
2703 add_psymbol_to_list (gdb::string_view (p
, q
- p
), true,
2704 VAR_DOMAIN
, LOC_CONST
, -1,
2705 psymbol_placement::STATIC
,
2706 0, psymtab_language
, objfile
);
2707 /* Point past the name. */
2709 /* Skip over the value. */
2710 while (*p
&& *p
!= ',')
2712 /* Advance past the comma. */
2720 /* Constant, e.g. from "const" in Pascal. */
2721 add_psymbol_to_list (gdb::string_view (namestring
,
2723 true, VAR_DOMAIN
, LOC_CONST
, -1,
2724 psymbol_placement::STATIC
,
2725 0, psymtab_language
, objfile
);
2731 int name_len
= p
- namestring
;
2732 char *name
= (char *) xmalloc (name_len
+ 1);
2734 memcpy (name
, namestring
, name_len
);
2735 name
[name_len
] = '\0';
2736 function_outside_compilation_unit_complaint (name
);
2739 add_psymbol_to_list (gdb::string_view (namestring
,
2741 true, VAR_DOMAIN
, LOC_BLOCK
,
2742 SECT_OFF_TEXT (objfile
),
2743 psymbol_placement::STATIC
,
2745 psymtab_language
, objfile
);
2748 /* Global functions were ignored here, but now they
2749 are put into the global psymtab like one would expect.
2750 They're also in the minimal symbol table. */
2754 int name_len
= p
- namestring
;
2755 char *name
= (char *) xmalloc (name_len
+ 1);
2757 memcpy (name
, namestring
, name_len
);
2758 name
[name_len
] = '\0';
2759 function_outside_compilation_unit_complaint (name
);
2763 /* We need only the minimal symbols for these
2764 loader-generated definitions. Keeping the global
2765 symbols leads to "in psymbols but not in symbols"
2767 if (startswith (namestring
, "@FIX"))
2770 add_psymbol_to_list (gdb::string_view (namestring
,
2772 true, VAR_DOMAIN
, LOC_BLOCK
,
2773 SECT_OFF_TEXT (objfile
),
2774 psymbol_placement::GLOBAL
,
2776 psymtab_language
, objfile
);
2779 /* Two things show up here (hopefully); static symbols of
2780 local scope (static used inside braces) or extensions
2781 of structure symbols. We can ignore both. */
2795 case '#': /* For symbol identification (used in
2800 /* It is a C++ nested symbol. We don't need to record it
2801 (I don't think); if we try to look up foo::bar::baz,
2802 then symbols for the symtab containing foo should get
2803 read in, I think. */
2804 /* Someone says sun cc puts out symbols like
2805 /foo/baz/maclib::/usr/local/bin/maclib,
2806 which would get here with a symbol type of ':'. */
2810 /* Unexpected symbol descriptor. The second and
2811 subsequent stabs of a continued stab can show up
2812 here. The question is whether they ever can mimic
2813 a normal stab--it would be nice if not, since we
2814 certainly don't want to spend the time searching to
2815 the end of every string looking for a
2818 complaint (_("unknown symbol descriptor `%c'"), p
[1]);
2820 /* Ignore it; perhaps it is an extension that we don't
2830 xcoff_end_psymtab (objfile
, pst
, psymtab_include_list
, includes_used
,
2831 ssymnum
, dependency_list
,
2832 dependencies_used
, textlow_not_set
);
2835 /* Record the toc offset value of this symbol table into objfile
2836 structure. If no XMC_TC0 is found, toc_offset should be zero.
2837 Another place to obtain this information would be file auxiliary
2840 XCOFF_DATA (objfile
)->toc_offset
= toc_offset
;
2843 /* Return the toc offset value for a given objfile. */
2846 xcoff_get_toc_offset (struct objfile
*objfile
)
2849 return XCOFF_DATA (objfile
)->toc_offset
;
2853 /* Scan and build partial symbols for a symbol file.
2854 We have been initialized by a call to dbx_symfile_init, which
2855 put all the relevant info into a "struct dbx_symfile_info",
2856 hung off the objfile structure.
2858 SECTION_OFFSETS contains offsets relative to which the symbols in the
2859 various sections are (depending where the sections were actually
2863 xcoff_initial_scan (struct objfile
*objfile
, symfile_add_flags symfile_flags
)
2867 int num_symbols
; /* # of symbols */
2868 file_ptr symtab_offset
; /* symbol table and */
2869 file_ptr stringtab_offset
; /* string table file offsets */
2870 struct xcoff_symfile_info
*info
;
2874 info
= XCOFF_DATA (objfile
);
2875 symfile_bfd
= abfd
= objfile
->obfd
;
2876 name
= objfile_name (objfile
);
2878 num_symbols
= bfd_get_symcount (abfd
); /* # of symbols */
2879 symtab_offset
= obj_sym_filepos (abfd
); /* symbol table file offset */
2880 stringtab_offset
= symtab_offset
+
2881 num_symbols
* coff_data (abfd
)->local_symesz
;
2883 info
->min_lineno_offset
= 0;
2884 info
->max_lineno_offset
= 0;
2885 bfd_map_over_sections (abfd
, find_linenos
, info
);
2887 if (num_symbols
> 0)
2889 /* Read the string table. */
2890 init_stringtab (abfd
, stringtab_offset
, objfile
);
2892 /* Read the .debug section, if present and if we're not ignoring
2894 if (!(objfile
->flags
& OBJF_READNEVER
))
2896 struct bfd_section
*secp
;
2897 bfd_size_type length
;
2898 bfd_byte
*debugsec
= NULL
;
2900 secp
= bfd_get_section_by_name (abfd
, ".debug");
2903 length
= bfd_section_size (secp
);
2907 = (bfd_byte
*) obstack_alloc (&objfile
->objfile_obstack
,
2910 if (!bfd_get_full_section_contents (abfd
, secp
, &debugsec
))
2912 error (_("Error reading .debug section of `%s': %s"),
2913 name
, bfd_errmsg (bfd_get_error ()));
2917 info
->debugsec
= (char *) debugsec
;
2921 /* Read the symbols. We keep them in core because we will want to
2922 access them randomly in read_symbol*. */
2923 val
= bfd_seek (abfd
, symtab_offset
, SEEK_SET
);
2925 error (_("Error reading symbols from %s: %s"),
2926 name
, bfd_errmsg (bfd_get_error ()));
2927 size
= coff_data (abfd
)->local_symesz
* num_symbols
;
2928 info
->symtbl
= (char *) obstack_alloc (&objfile
->objfile_obstack
, size
);
2929 info
->symtbl_num_syms
= num_symbols
;
2931 val
= bfd_bread (info
->symtbl
, size
, abfd
);
2933 perror_with_name (_("reading symbol table"));
2935 /* I'm not sure how how good num_symbols is; the rule of thumb in
2936 init_psymbol_list was developed for a.out. On the one hand,
2937 num_symbols includes auxents. On the other hand, it doesn't
2939 init_psymbol_list (objfile
, num_symbols
);
2941 scoped_free_pendings free_pending
;
2942 minimal_symbol_reader
reader (objfile
);
2944 /* Now that the symbol table data of the executable file are all in core,
2945 process them and define symbols accordingly. */
2947 scan_xcoff_symtab (reader
, objfile
);
2949 /* Install any minimal symbols that have been collected as the current
2950 minimal symbols for this objfile. */
2954 /* DWARF2 sections. */
2956 if (dwarf2_has_info (objfile
, &dwarf2_xcoff_names
))
2957 dwarf2_build_psymtabs (objfile
);
2959 dwarf2_build_frame_info (objfile
);
2963 xcoff_symfile_offsets (struct objfile
*objfile
,
2964 const section_addr_info
&addrs
)
2966 const char *first_section_name
;
2968 default_symfile_offsets (objfile
, addrs
);
2970 /* Oneof the weird side-effects of default_symfile_offsets is that
2971 it sometimes sets some section indices to zero for sections that,
2972 in fact do not exist. See the body of default_symfile_offsets
2973 for more info on when that happens. Undo that, as this then allows
2974 us to test whether the associated section exists or not, and then
2975 access it quickly (without searching it again). */
2977 if (objfile
->section_offsets
.empty ())
2978 return; /* Is that even possible? Better safe than sorry. */
2980 first_section_name
= bfd_section_name (objfile
->sections
[0].the_bfd_section
);
2982 if (objfile
->sect_index_text
== 0
2983 && strcmp (first_section_name
, ".text") != 0)
2984 objfile
->sect_index_text
= -1;
2986 if (objfile
->sect_index_data
== 0
2987 && strcmp (first_section_name
, ".data") != 0)
2988 objfile
->sect_index_data
= -1;
2990 if (objfile
->sect_index_bss
== 0
2991 && strcmp (first_section_name
, ".bss") != 0)
2992 objfile
->sect_index_bss
= -1;
2994 if (objfile
->sect_index_rodata
== 0
2995 && strcmp (first_section_name
, ".rodata") != 0)
2996 objfile
->sect_index_rodata
= -1;
2999 /* Register our ability to parse symbols for xcoff BFD files. */
3001 static const struct sym_fns xcoff_sym_fns
=
3004 /* It is possible that coff and xcoff should be merged as
3005 they do have fundamental similarities (for example, the extra storage
3006 classes used for stabs could presumably be recognized in any COFF file).
3007 However, in addition to obvious things like all the csect hair, there are
3008 some subtler differences between xcoffread.c and coffread.c, notably
3009 the fact that coffread.c has no need to read in all the symbols, but
3010 xcoffread.c reads all the symbols and does in fact randomly access them
3011 (in C_BSTAT and line number processing). */
3013 xcoff_new_init
, /* init anything gbl to entire symtab */
3014 xcoff_symfile_init
, /* read initial info, setup for sym_read() */
3015 xcoff_initial_scan
, /* read a symbol file into symtab */
3016 NULL
, /* sym_read_psymbols */
3017 xcoff_symfile_finish
, /* finished with file, cleanup */
3018 xcoff_symfile_offsets
, /* xlate offsets ext->int form */
3019 default_symfile_segments
, /* Get segment information from a file. */
3020 aix_process_linenos
,
3021 default_symfile_relocate
, /* Relocate a debug section. */
3022 NULL
, /* sym_probe_fns */
3026 /* Same as xcoff_get_n_import_files, but for core files. */
3029 xcoff_get_core_n_import_files (bfd
*abfd
)
3031 asection
*sect
= bfd_get_section_by_name (abfd
, ".ldinfo");
3033 file_ptr offset
= 0;
3037 return -1; /* Not a core file. */
3039 for (offset
= 0; offset
< bfd_section_size (sect
);)
3045 if (!bfd_get_section_contents (abfd
, sect
, buf
, offset
, 4))
3047 next
= bfd_get_32 (abfd
, buf
);
3049 break; /* This is the last entry. */
3053 /* Return the number of entries, excluding the first one, which is
3054 the path to the executable that produced this core file. */
3055 return n_entries
- 1;
3058 /* Return the number of import files (shared libraries) that the given
3059 BFD depends on. Return -1 if this number could not be computed. */
3062 xcoff_get_n_import_files (bfd
*abfd
)
3064 asection
*sect
= bfd_get_section_by_name (abfd
, ".loader");
3068 /* If the ".loader" section does not exist, the objfile is probably
3069 not an executable. Might be a core file... */
3071 return xcoff_get_core_n_import_files (abfd
);
3073 /* The number of entries in the Import Files Table is stored in
3074 field l_nimpid. This field is always at offset 16, and is
3075 always 4 bytes long. Read those 4 bytes. */
3077 if (!bfd_get_section_contents (abfd
, sect
, buf
, 16, 4))
3079 l_nimpid
= bfd_get_32 (abfd
, buf
);
3081 /* By convention, the first entry is the default LIBPATH value
3082 to be used by the system loader, so it does not count towards
3083 the number of import files. */
3084 return l_nimpid
- 1;
3087 void _initialize_xcoffread ();
3089 _initialize_xcoffread ()
3091 add_symtab_fns (bfd_target_xcoff_flavour
, &xcoff_sym_fns
);